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44results about How to "Solve tough problems" patented technology

Authentication group key management method based on identity

The present invention discloses a identity-based authentication group key management method which comprises the following steps: embedding ID into key with bilinear pairing in elliptic curve; generating Ci as part of main key ui according to the secret key and ID of group member ui by key generating center, and transmitting the Ci to ui through overt channel; generating main key according to Ci and its own secret key by each group member ui; calculating overt key verification information according to Hash value of main key and over key by each group member, and broadcasting the link between over key and verification information inside the group; calculating the secret value sharing with left and right neighbors when the received information is verified to be true by each group member, and calculating the group member information Xi included in group session key according to the secret value, and then broadcasting the Xi inside the group; calculating group session key K according to all Xj, j=1, ...,n, by each group member. The invention has the advantages of no key escrow and no need of secure channel, which can be applied in coordination and distributed network as secure reliable group communication.
Owner:XIDIAN UNIV

Electrical equipment operation condition classification method

The invention relates to an electrical equipment operation condition classification method, which comprises the steps of building training data of a mean clustering model; pre-processing the training data, deleting invalid data and carrying out normalization processing; adopting a K-means++ algorithm for determining an initial clustering center; determining upper and lower limitations of clustering classification categories; circularly realizing a clustering process of multiple categories; carrying out evaluation analysis on a clustering result, and determining an optimal clustering category number K value; selecting an optimal K value model as an optimal condition classification result, so that the efficiency and the accuracy are improved.
Owner:SHANDONG LUNENG SOFTWARE TECH

Hyper-gravity reactor and reaction method

The invention discloses a hyper-gravity reactor and a reaction method. The hyper-gravity reactor is provided with two liquid inlets. Two liquid inlets are respectively connected to responding liquid distributors. The spraying pipes of two liquid distributors are separated and arranged on concentric rings, which take the middle shaft of a rotation bed as the center. The reaction method comprises the following steps: feeding a reaction material and a catalyst or two reaction materials into the hyper-gravity reactor from the two liquid inlets, then spraying the reaction material and the catalyst or two reaction materials on the internal edges of rotating filling materials or solid catalysts from two individual spraying pipes so as to mix the reaction material and the catalyst or two reaction materials, carrying out reactions by contacting the reaction material and the catalyst or two reaction materials, or carrying out reactions by contacting the mixture with gas. The structure and distribution of the liquid inlets and spraying pipes of the hyper-gravity reactor are both improved so as to mix the liquid catalyst and liquid reactant in a hyper-gravity field, because the mixing effect is good in a hyper-gravity field. At the same time the problems of the post treatment for separating the liquid catalyst and the liquid products are also solved and simplified.
Owner:CHINA PETROLEUM & CHEM CORP +1

Public traffic system and construction method thereof

The invention relates to the technical fields of traffic engineering and civil engineering, and discloses a public traffic system and a construction method thereof. The public traffic system comprises at least one of the following systems of a lane traffic system (2) and an overhead track traffic system (3). The public traffic system is characterized in that the lane traffic system (2) or the overhead track traffic system (3) comprises an intersection node commercial traffic hub transfer building (4); crossings are intersection nodes of lanes (21); the lanes (21) comprise at least one type of motor vehicle lanes (21.1), non-motor vehicle lanes (21.2), ground walkways (21.3), overpasses (22) and tunnels (23); and the intersection node commercial traffic hub transfer building (4) is arranged in at least one of the following lane (21) crossing positions of crossing centers, crossing corners, interiors and exteriors of crossing edges, parts above the crossings, and parts below the crossings. The public traffic system needs a small investment or does not need a government investment, allows low operation and maintenance costs, has a short construction period, and can fully develop subway functions of a high speed and a large passenger transport amount. Therefore, the public traffic system perfectly solves public traffic problems.
Owner:吕怀民 +1

Low-alloyed degradable miniature inner fixed assembly, magnesium alloy preparation method and magnesium alloy material

The invention discloses a low-alloyed degradable miniature inner fixed assembly, a magnesium alloy preparation method and a magnesium alloy material. The low-alloyed magnesium alloy material which ismicro in impurity content and low in degrading rate is obtained by means of the preparation methods of smelting, solution heat treatment and the like. Different strength and plasticity are matched bymeans of adjusting and rolling and post-rolling annealing process of the magnesium alloy material, so as to prepare medical implant miniature inner fixed assemblies which have different demands on strength and plasticity.
Owner:西安卓恰新材料科技有限公司

Making method of flavor fish product

The invention relates to a flavor fish product and a making method thereof. The method provided by the invention comprises the steps of: raw material treatment, curing, fermenting, drying, packaging and sterilizing. The method applies different strains, like lactobacillus plantarum and yeast to fermentation of fish so as to obtain a natural sweet and sour flavor product, and mixing the product with lemon juice and honey. The product is unique in flavor, and is nutritive and healthy. Compared with traditional dried products, the fermented dried fish has reduced fleshy roughness, more delicate taste, higher moisture content, and extended shelf life, and is more conducive to product circulation.
Owner:DALIAN POLYTECHNIC UNIVERSITY +1

Y2 O3 nanometer carrier Ag catalyst, its synthesis and use

A Y2O3 nanobelt carried Ag catalyst for catalytic hydrogenation reaction with high activity, selectivity and safety is prepared through proportionally adding hexahydrated yttrium nitrate solid, dodecylamine and octadecene into reactor, heating to 300-320 deg.C at the speed of 5-15 deg.C per min, reacting, quickly adding AgNO3, continuous reacting, natural cooling, washing with heptane and alcohol 5-7 times, and vacuum drying.
Owner:NANJING UNIV

AC frequency conversion speed regulation method simulating series excitation DC motor soft features

ActiveCN105162383AImprove battery lifeSoftening mechanical characteristic curveAC motor controlFrequency changerControl vector
The invention relates to the frequency conversion speed regulation technology for a mine special battery vehicle, and particularly relates to an AC frequency conversion speed regulation method simulating series excitation DC motor soft features, so as to solve the problem that the mechanical feature curve of the existing low-voltage DC / AC frequency conversion speed regulation system is over rigid. The method is realized by adopting the following steps: 1) the input end of the AC motor and the output end of a frequency converter are connected; 2) when the AC motor is used for heavy-load starting and full-load climbing, the frequency converter adopts a torque vector control mode to control the torque of the AC motor to be maintained as the maximal torque; 3) when the AC motor is used for full-load level road driving, the frequency converter adopts a frequency given control mode to control the power of the AC motor to be the rated power; and 4) when the AC motor is used for idling driving, the frequency converter adopts a torque given control mode to control the torque of the AC motor to be maintained to be constant. The method of the invention is applied to the mine special battery vehicle.
Owner:TAIYUAN INST OF CHINA COAL TECH & ENG GROUP +1

Magnetic attraction type self-adapting wall surface moving robot

The invention provides a magnetic attraction type self-adapting wall surface moving robot. The magnetic attraction type self-adapting wall surface moving robot comprises a bottom plate and driving devices. A plurality of magnetic rolling wheels are all hinged to the bottom plate, the driving devices are mounted on the bottom plate and connected with the magnetic rolling wheels so as to drive the magnetic rolling wheels to rotate. The magnetic attraction type self-adapting wall surface moving robot is attracted on the wall surface through magnetic force between the magnetic rolling wheels and the wall surface, attraction force is large, and thus falling is avoided; the attraction mode is simple and convenient, attraction is conducted directly through the magnetic force between the multiplemagnetic rolling wheels and the wall surface, and other attraction devices do not need to be additionally arranged; according to the magnetic attraction type self-adapting wall surface moving robot, through hinging between the magnetic rolling wheels and the bottom plate, the hinged position of each magnetic rolling wheel and the bottom plate is equivalent to a joint of the robot; the magnetic rolling wheels can rotate relative to the bottom plate so as to adapt to wall surfaces at different conditions, and therefore, the wall surface moving robot has the function of climbing on the wall surfaces of different curvatures flexibly and freely and is high in adaptability.
Owner:CHANGSHA ZHIWEI ELECTRONICS TECH CO LTD

Preparation method of unsaturated ester containing alcohol amine group, obtained product and application thereof

The invention discloses an unsaturated ester containing an alcohol amine group, and a preparation method and an application thereof. The unsaturated ester containing the alcohol amine group is formedby esterification reaction of an alcohol amine compound and unsaturated anhydride. The preparation method is simple, the preparation process is easy to control, the yield is high, and industrialized production is convenient. The early strength of a cement-based material can be significantly improved by introducing the unsaturated ester containing the alcohol amine group into molecules of a polycarboxylic water reducer. Carboxylic groups and ester groups of unsaturated monomers can make the polycarboxylic water reducer have good dispersibility and dispersion retention property; the alcohol amine group can be complexed with metal ions in cement slurry and forms stable complexes with the metal ions, so the hydration of cement minerals can be promoted, ettringite is generated, the diffusion rate of hydration products is improved, the hydration accelerating period of cement is accelerated to enter, the setting time is shortened, and the early strength of the cement-based material is increased.
Owner:UNIV OF JINAN +1

Operating method for grinding periphery of thin-wall part

The invention relates to the technical field of processing of parts, in particular to an operating method for grinding the periphery of a thin-wall part. The method comprises the following steps: (1) installing an angle iron device on a working platform removing a magnetic sucker; (2) using the angle iron device to press the thin-wall part; (3) carrying out grinding processing on the thin-wall part; (4) taking down the thin-wall part from the angle iron device, and carrying out grinding processing on another surface; and (5) repeating the step (4) till the peripheral surfaces of the thin-wall part are respectively ground and processed. The angle iron device can guarantee peripheral grinding of the long and high thin-wall part, achieves the requirement of paper size, and reduces the processing deformation. The operating method can solve certain troublesome problems and can grind the peripheral edges of a plurality of thin-wall parts with high efficiency.
Owner:CRRC QISHUYAN CO LTD

Customer service demand identification method and device

One or more embodiments of the present specification provide a customer service demand identification method and device. The method comprises the following steps of acquiring application usage information of a target user, with the application usage information comprising at least one of application operation behavior data, application operation interface screenshots, and application exception detection information; based on the application use information of the target user, intelligently identifying whether the target user has a customer service demand or not; when determining that the target user needs customer service, automatically pushing customer service to the target user. Therefore, the customer service entrance does not need to be arranged at a significant position; even if the customer service entrance is arranged at a relatively hidden position, the target user can still be ensured to quickly enter the customer service module, so that the target user is ensured to enjoy thecorresponding customer service in time, the troublesome problem encountered by the target user is solved in time through customer service intervention, and the user experience is improved.
Owner:ADVANCED NEW TECH CO LTD

Face cartoon image design method

The invention provides a face cartoon image design method, and the method comprises the steps: 1, obtaining a face image; 2, collecting a plurality of feature points of the image, constructing a feature vector of a human face through the feature points, and constructing a face attribute topological graph which represents the topological structure of all organs of the human face and has certain tolerance to the deformation of the human face, wherein each top point in the topological graph represents one feature vector which is used for recording the feature information of the feature points nearby the top point; 3, building a cartoon image database through combining the feature vectors of the human face, the face attribute topological graph and a curvature line of the contour line of the human face; 4, comparing the feature points with the database, and extracting a cartoon image; 5, carrying out the rendering and special effect processing of the cartoon image, and generating a face ofa cartoon figure model; 6, detecting the key information of the face of the cartoon figure model, and outputting the key information to a mobile terminal. The method achieves the visualization of theface cartoon, solves problems of rigid and inflexible lines of faces, and meets the entertainment demands of users.
Owner:TIANJIN HAOBAOFENG TECH CO LTD

Full-automatic humidity sensor and related system and method

The invention provides an inductor capable of realizing full-automatic contact type moisture detection. The inductor comprises a flat-like appearance, which is used for being inserted into an invisible pocket of an intelligent absorption article comprising a first induction line and a second induction line in a barrier-free manner, and comprises a first flat surface and a second flat surface, wherein the first flat surface comprises a first contact and a second contact which are slightly raised, so that when the inductor is inserted, the invisible pocket is deformed and stretched to generate tension to clamp the invisible pocket, and the induction line is tightly attached to the contact to realize electric connection; the inductor further comprises an insertion detection device and an automatic startup and shutdown control device, which are used for automatically activating the inductor to enter a working state when the inductor is inserted and automatically shielding the inductor to enter a standby dormant state when the inductor is taken out from the invisible pocket; the inductor further comprises a parameter detection device which is used for achieving humidity detection of the intelligent absorption article. The invention further provides a full-automatic absorption article humidity monitoring system device and a method for achieving full-automatic humidity monitoring and energy consumption management.
Owner:SHENZHEN CDIAPER TECH LTD

Intelligent absorption article comprising induction line and invisible pocket

The invention provides an intelligent absorption article. The intelligent absorption article comprises a paper diaper, an induction line and an invisible pocket, wherein the paper diaper comprises a surface layer, an absorption layer, a bottom film, an outer-layer non-woven fabric, a left sticker, a right sticker and a front abdomen sticker; the invisible pocket comprises an opening, is arranged below the front abdomen sticker and is used for containing an inductor and bearing an acting force component which is generated by the front abdomen sticker, the left sticker and the right sticker and is vertical to the front abdomen of a user in a utilization process of the paper diaper; and under the action of the acting force component, a contact of the inductor is in tight contact with the induction line of the paper diaper and reliable electric connection is realized. The invention further provides an intelligent absorption article moisture monitoring system; the intelligent absorption article moisture monitoring system comprises an absorption article, the induction line, the invisible pocket and the inductor; the inductor is of a flat streamline-shaped appearance structure; the invisible pocket comprises the opening; after the inductor is inserted, the invisible pocket is deformed and stretched and elastic force is generated to clamp and fix the inductor; and meanwhile, the elastic force also enables the induction line to be tightly fitted with the contact of the inductor and the reliable electric connection is realized.
Owner:SHENZHEN CDIAPER TECH LTD

Traditional Chinese medicine bacterial fertilizer produced by utilizing traditional Chinese medicine waste residues and preparation method thereof

The invention provides a traditional Chinese medicine bacterial fertilizer produced by utilizing traditional Chinese medicine waste residues. The traditional Chinese medicine bacterial fertilizer comprises the following raw materials in parts by weight: 60-80 parts of traditional Chinese medicine waste residues with water content of 70-80%; 20-40 parts of a wet auxiliary material with a water content of 50%-75%; 30-50 parts of a dry auxiliary material with a water content of 0.1%-20%; 5-10 parts of trace elements; 5-10 parts of a fermentation inoculant; 1-2 parts of beneficial viable bacteria; and 5-10 parts of potassium fulvate. The preparation method of the traditional Chinese medicine bacterial fertilizer comprises the following steps: determining a ratio, mixing materials, fermenting, crushing and refining, granulating and supplementing bacteria. The traditional Chinese medicine waste residues serve as fermentation main materials, the water content of the fermentation raw materials is controlled within a suitable range by adding the dry auxiliary materials and the wet auxiliary materials, the drying link is omitted in the middle, the fermentation time is greatly shortened, the energy consumption and the labor cost are saved, and meanwhile the preparation method is not limited by regions and weather and is wider in applicability.
Owner:天津市农业科学院

Generation and authentication method of self-certified public key of mobile self-organized network

The invention discloses a management method of self-certified public key of a mobile self-organized network on the basis of ECC, comprising the following steps: a shared key is distributed to n virtual central nodes by threshold cryptology; a user chooses a secret random number to calculate a public parameter, and identity and the public parameter are sent to a nearby virtual central node A1; A1 contacts with other virtual central nodes and sends the user information to the nodes; each publisher Ai chooses a random secret integer and calculates as well as broadcasts a self-certified public key subblock Qi to other publishers according to the secret integers and parameters published by the user; each publisher Ai calculates a self-certified public key Q, a sub-signature xi and an intermediate quantity Ri and sends (r, I, xi and Ri) to a synthesizer; the synthesizer calculates and synthesizes a signature x after all sub-signatures are qualified after authentication and sends Q and x to the user; the user calculates a secret key s according to the x; and the authenticity of the self-certified public key of the user is verified. The invention has no certificate management, no key escrow and no secure channel, so that the invention is suitable for the safe communication of the mobile self-organization network with limited resource.
Owner:XIDIAN UNIV

Defecation flushing collection equipment for patient lying in bed

PendingCN108294893ASolve the problem of timely cleaning of defecationImprove the quality of lifeNursing urinalsMedical transportEngineeringMechanical engineering
Provided is defecation flushing collection equipment for patients lying in bed. The structure comprises an excrement collecting mechanism, an excrement containing mechanism, an excrement transportingtube, a water supply system, an odour removing system and a controller; the excrement collecting mechanism comprises a defecation pot portion, and the defecation pot portion is provided with a defecation mouth; the odour removing mechanism comprises an exhaust pipe, a gas filtering device and an exhaust and ventilation motor, and an air outlet end of the exhaust pipe extends into the gas filteringdevice; an excrement outlet end of the excrement transporting pipe is slidably sleeved with a sliding annular tube, and the upper and lower end portions of the annular cavity of the sliding annular tube are enclosed; sliding annular tube inlet and outlet used for accessing of the sliding annular tube; an air inlet end of the exhaust pipe extends into the annular cavity of the sliding annular tube, an air inlet through hole is formed in the outer wall body of the annular cavity, when the sliding annular tube enters into an excrement container through the sliding annular tube inlet and outlet,the junction of the air inlet mouth of exhaust pipe and an annular tube is located outside the excrement container, the air inlet through hole is located in the excrement container, and the controlleris used for controlling a water supply mechanism and the exhaust and ventilation motor to be started up and shut down.
Owner:石家庄德度光电科技有限公司

Intelligent inspection equipment system based on robot

The invention relates to an intelligent inspection equipment system based on a robot. The system comprises a browser client for displaying and processing an inspection result, an inspection module subsystem for issuing an inspection task and receiving an inspection result, a drive-by-wire layer platform for managing the inspection module subsystem and interacting with the robot, and an inspectionrobot subsystem for acquiring an inspection result. An intelligent inspection equipment system is composed of the client, an inspection module and the drive-by-wire layer platform, the inspection efficiency is greatly improved by performing unified scheduling and controlling on each machine room robot and feeding back result information to the client in real time, the automation degree is greatlyimproved, and the timeliness of the inspection feedback has the real progress.
Owner:上海玖道信息科技股份有限公司

Preparation method of chiral 1, 4-diphenyl-2-hydroxy-1, 4-dibutanone compound

The invention provides a preparation method of a chiral 1, 4-diphenyl-2-hydroxyl-1, 4-dibutanone compound. The method comprises the following steps: in the presence of a chiral metal compound, mixing silyl enol ether and phenylacetaldehyde monohydrate or substituted phenylacetaldehyde monohydrate in a solvent and performing action to obtain the chiral 1, 4-diphenyl-2-hydroxy-1, 4-dibutanone compound, wherein the reaction equation is as shown in the formula 1; R1 of silyl enol ether is of a phenyl or furan structure, a substituent R2 in substituted phenyl glyoxal monohydrate is selected from one or more of hydrogen atoms, halogen, methyl, methoxyl, nitryl and trifluoromethyl, and the substituent is at the ortho-position, meta-position or para-position of a benzene ring. The chiral metal compound can efficiently and highly enantioselectively catalyze the asymmetric Mukaiyama aldol reaction of the phenylacetaldehyde monohydrate compound, a new method for synthesizing the 1, 4-diphenyl-2-hydroxy-1, 4-dibutanone compound is provided, the problem that conditions are harsh in the original reaction is solved, and the chiral metal compound is more environmentally friendly.
Owner:UNIV OF SCI & TECH OF CHINA

Kit for detecting COX-2 gene polymorphism

The invention discloses a kit for detecting COX-2 gene polymorphism. The kit comprises a box body, a box cover, a sponge lining, a freezing box frame and a freezing box, wherein the box cover is connected with the box body through hinging; the box body is internally provided with a first groove; the freezing box frame is vertically arranged at the middle position of the first groove; and the sponge lining is located in the box body. The kit disclosed by the invention is applicable to clinical detection of various sample types and has the advantages of strong specificity, high sensitivity, short experiment period, low cost and the like; the wicked problems in a transportation process of the kit are solved, and the kit can be rapidly taken and is simple and convenient to operate in a testingprocess; the box body of the kit adopts a three-layered structure; an inner layer is made of PS (Polystyrene) and has the advantages of safety and no toxicity, high temperature resistance and easiness for washing; a heat-insulation layer is made of PU (Polyurethane), has a low-temperature heat conduction function, can keep temperature and humidity balance for long time and has vibration-proof andcompression-resisting, waterproof and moisture-proof functions; and an outer layer is made of PE (Polyethylene) and has the advantages of strong chemical stability, safety and environment friendlessand good wear resistance.
Owner:NINGBO AUCHEER BIOTECHNOLOGY CO LTD

Flexible edge processing equipment for hook-and-loop fastener bandage of medical stretcher and process of flexible edge processing equipment

The invention provides flexible edge processing equipment for a hook-and-loop fastener bandage of a medical stretcher and a process of the flexible edge processing equipment. The processing equipment comprises a support; the support comprises a first-layer bottom plate and a second-layer bottom plate; the first-layer bottom plate is sequentially provided with a hook-and-loop fastener bandage box, a set of coating mechanisms, a set of cloth strip boxes and a traction mechanism; the second-layer bottom plate is sequentially provided with a guiding mechanism, a folding mechanism, a pressing mechanism and a sueding mechanism; a bandage roll is mounted on the hook-and-loop fastener bandage box; a cloth roll is mounted on the cloth strip boxes; the set of cloth strip boxes are arranged on the two sides of the hook-and-loop fastener bandage; and the bandage is attached to cloth strips after passing through the coating mechanisms, and the two sides of the bandage are covered with the cloth strips through the traction mechanism, the guiding mechanism, the folding mechanism, the pressing mechanism and the sueding mechanism in sequence. According to the flexible edge processing equipment for the hook-and-loop fastener bandage of the medical stretcher and the process of the flexible edge processing equipment, a boxing mechanism, the coating mechanisms, the traction mechanism, the guiding mechanism, the folding mechanism, the pressing mechanism and the sueding mechanism are sequentially arranged on the double-layer supports, so that flexible edge processing treatment of the two side edges of the hook-and-loop fastener bandage is achieved, and the problem that the side edges of the hook-and-loop fastener bandage are hard and stab the hands is solved.
Owner:绍兴和得织带有限公司

Edge folding device for fishing tackle production

InactiveCN112570522AAdjustable relative distanceRealize the folding operationEdge grinding machinesGrinding drivesMarine engineeringStructural engineering
The invention belongs to the technical field of edge folding devices, and discloses an edge folding device for fishing tackle production. The edge folding device comprises a base, a stand column is fixedly installed on the outer top wall of the base, a top plate is fixedly connected to the end, away from the base, of the stand column, a second air cylinder is movably connected to the outer bottomwall of the top plate, a clamping seat is fixedly installed at the output end of the second air cylinder, an edge folding cutter is movably installed on the side, away from the second air cylinder, ofthe clamping seat, a sliding block is movably connected to the outer bottom wall of the top plate, and a connecting seat is fixedly installed on the side, away from the top plate, of the sliding block. According to the edge folding device, on one hand, the second air cylinder drives the clamping seat and the edge folding cutter to do lifting motion along the earth vertical, on the other hand, a platform is driven by a first air cylinder to penetrate through a through groove to move in the direction of the edge folding cutter, edge folding operation for fishing tackle production can be achieved, meanwhile, the relative distance between the two edge folding cutters can be adjusted through movable connection of the edge folding cutters and sliding grooves, and therefore edge folding operation of various forms can be achieved.
Owner:江门市浩海钓具有限公司

A public transportation system and its construction method

The invention relates to the technical fields of traffic engineering and civil engineering, and discloses a public traffic system and a construction method thereof. The public traffic system comprises at least one of the following systems of a lane traffic system (2) and an overhead track traffic system (3). The public traffic system is characterized in that the lane traffic system (2) or the overhead track traffic system (3) comprises an intersection node commercial traffic hub transfer building (4); crossings are intersection nodes of lanes (21); the lanes (21) comprise at least one type of motor vehicle lanes (21.1), non-motor vehicle lanes (21.2), ground walkways (21.3), overpasses (22) and tunnels (23); and the intersection node commercial traffic hub transfer building (4) is arranged in at least one of the following lane (21) crossing positions of crossing centers, crossing corners, interiors and exteriors of crossing edges, parts above the crossings, and parts below the crossings. The public traffic system needs a small investment or does not need a government investment, allows low operation and maintenance costs, has a short construction period, and can fully develop subway functions of a high speed and a large passenger transport amount. Therefore, the public traffic system perfectly solves public traffic problems.
Owner:吕怀民 +1

A device and method for improving multi-effect concentration and evaporation capacity

The invention discloses a device for improving the multi-effect evaporative concentration capacity. A multi-effect heating evaporation mechanism includes a single-effect heating evaporation assembly,a double-effect heating evaporation assembly and a triple-effect evaporation assembly; the single-effect heating evaporation assembly includes a single-effect heater and a single-effect separation chamber, the double-effect heating evaporation assembly includes a double-effect heater and a double-effect separation chamber, the triple-effect evaporation assembly includes a triple-effect heater anda triple-effect separation chamber, the single-effect heater, the double-effect heater and the triple-effect heater are sequentially connected in series through a downstream pipeline, the single-effect separation chamber is respectively connected with the top and the bottom of the single-effect heater, the double-effect separation chamber is respectively connected with the top and the bottom of the double-effect heater, and the triple-effect separation chamber is respectively connected with the top and the bottom of the triple-effect heater; each of the single-effect heating evaporation assembly and the double-effect heating evaporation assembly also includes a steam tube capable of generating steam; the steam tubes are respectively correspondingly connected with the single-effect heater and the double-effect heater; and the device also includes a secondary steam tube, and the double-effect separation chamber is connected to with the triple-effect heater through the secondary steam tube.
Owner:WENGFU DAZHOU CHEM CO LTD

A mold for side punching of U-shaped section products

The invention relates to a die for punching of a side edge of a product with a U-shaped section, comprising a male die, a female die and a lower die plate, wherein a lower die is arranged at the upper end of the lower die plate, a sliding block is arranged at one side of the lower die, the female die is arranged at the upper end of the lower die, a through hole is vertically formed in one end of the female die, the other end of the female die stretches into the side wall of the sliding block to be fixed, the lower die plate is connected with the sliding block by a round-wire spiral spring, the sliding block and the lower die are connected with a fixed plate arranged above the female die by an unloading guide pillar, an unloading plate capable of sliding along the unloading guide pillar is arranged between the fixed plate and the female die, the male die is arranged in the fixed plate, the lower end of the male die slides in a movable slot of the unloading plate, an upper die plate is arranged at the upper end of the fixed plate, an unloading screw is in sliding connection in the upper die plate, and the lower end of the unloading screw penetrates through the fixed plate to be connected with the unloading plate. The die can improve the production efficiency and ensure the dimension precision and surface requirements of products.
Owner:重庆宏协承汽车部件有限公司

Construction method for treating flowing sand of deep foundation pit slope

InactiveCN110644498ASolve the problem of quicksand on the slopeSolve tough problemsExcavationsSoil scienceQuicksand
The invention discloses a construction method for treating flowing sand of a deep foundation pit slope. The essential significance of the construction method is to treat the stagnant water of the deepfoundation pit slope. Since releasable flowing can only occur to a geological sand layer with water under certain conditions inducement, the sand layer is naturally stopped if the water in the sand layer is discharged. The stagnant water in the geological sand layer is formed naturally, the conditions and reserves are both different, and the gushing potential of the flowing sand is different as well. According to the method, two measures are adopted according to the different gushing amounts, wherein the first measure is to use a reverse drainage water filtering channel and is suitable for the situation that the gushing of the flowing sand is small and slow; and the second measure is to use the reverse drainage water filtering channel and infiltrating wells, and is suitable for the case that the gushing of the flowing sand is large and the related section is long. The first measure of using the reverse drainage water filtering channel is characterized by comprising the steps of drilling a plurality of downwardly inclined water through holes in the edge of a trough at the trough slope where the flowing sand gushes, and intercepting the flowing sand water flowing into the foundationpit and draining the flowing sand into the sand layer of the next layer through filtering; and the second measure of using the reverse drainage water filtering channel and the infiltrating wells is characterized in that the water filtering channel is arranged at the trough slope and the plurality of infiltrating wells are additionally arranged at a place slightly away from the trough opening.
Owner:李贺清

A method of AC variable frequency speed regulation for simulating the soft characteristics of series-excited DC motor

ActiveCN105162383BImprove battery lifeSoftening mechanical characteristic curveAC motor controlFrequency changerControl vector
The invention relates to the frequency conversion speed regulation technology for a mine special battery vehicle, and particularly relates to an AC frequency conversion speed regulation method simulating series excitation DC motor soft features, so as to solve the problem that the mechanical feature curve of the existing low-voltage DC / AC frequency conversion speed regulation system is over rigid. The method is realized by adopting the following steps: 1) the input end of the AC motor and the output end of a frequency converter are connected; 2) when the AC motor is used for heavy-load starting and full-load climbing, the frequency converter adopts a torque vector control mode to control the torque of the AC motor to be maintained as the maximal torque; 3) when the AC motor is used for full-load level road driving, the frequency converter adopts a frequency given control mode to control the power of the AC motor to be the rated power; and 4) when the AC motor is used for idling driving, the frequency converter adopts a torque given control mode to control the torque of the AC motor to be maintained to be constant. The method of the invention is applied to the mine special battery vehicle.
Owner:TAIYUAN INST OF CHINA COAL TECH & ENG GROUP +1

Die for punching of side edge of product with U-shaped section

The invention relates to a die for punching of a side edge of a product with a U-shaped section, comprising a male die, a female die and a lower die plate, wherein a lower die is arranged at the upper end of the lower die plate, a sliding block is arranged at one side of the lower die, the female die is arranged at the upper end of the lower die, a through hole is vertically formed in one end of the female die, the other end of the female die stretches into the side wall of the sliding block to be fixed, the lower die plate is connected with the sliding block by a round-wire spiral spring, the sliding block and the lower die are connected with a fixed plate arranged above the female die by an unloading guide pillar, an unloading plate capable of sliding along the unloading guide pillar is arranged between the fixed plate and the female die, the male die is arranged in the fixed plate, the lower end of the male die slides in a movable slot of the unloading plate, an upper die plate is arranged at the upper end of the fixed plate, an unloading screw is in sliding connection in the upper die plate, and the lower end of the unloading screw penetrates through the fixed plate to be connected with the unloading plate. The die can improve the production efficiency and ensure the dimension precision and surface requirements of products.
Owner:重庆宏协承汽车部件有限公司

Pressure relief system for pilot oil of oscillating cylinder hydraulic control valve

The invention relates to the technical field of hydraulics, and especially relates to a pressure relief system for pilot oil of an oscillating cylinder hydraulic control valve. The pressure relief system comprises two oscillating oil cylinders, an oscillating cylinder hydraulic valve, two pumping oil cylinders and a pumping oil cylinder hydraulic valve; a first one-way valve is arranged between anoil outlet A1 of the pumping oil cylinder hydraulic valve and a pilot oil port a2 of the oscillating cylinder hydraulic valve; an inlet of the first one-way valve is connected to the pilot oil port a2 of the oscillating cylinder hydraulic valve and a signal port S1 of the pumping oil cylinder at the same time, and an outlet of the first one-way valve is connected to the oil outlet A1 of the pumping oil cylinder hydraulic valve; a second one-way valve is arranged between an oil outlet B1 of the pumping oil cylinder hydraulic valve and a pilot oil port b2 of the oscillating cylinder hydraulic valve; and an inlet of the second one-way valve is connected to the pilot oil port b2 of the oscillating cylinder hydraulic valve and a signal port S2 of the pumping oil cylinder at the same time, andan outlet of the second one-way valve is connected with the oil outlet B1 of the pumping oil cylinder hydraulic valve. The system provided by the invention is simple in structure, low in cost and capable of achieving the pressure relief problem of the pilot oil by utilizing the pressure difference, and achieves the purpose of rapidly placing an oscillating cylinder in place.
Owner:TIANJIN JIEQIANG POWER EQUIP
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