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47results about How to "Guaranteed sampling quality" patented technology

Non-destructive detection method and device for agricultural and animal products based on hyperspectral image technology

The invention relates to high optical spectral image technique without harm to agricultural products. It can reflect the appearance of the agriculture products like color, shape, texture, dimension, scar and son on, and internal features like hardness, protein content and connected with knowledge base and experience of experts to make judgment. It can make quick, accurate, timely judgment of products, controlling the overall production with guarantee of the agriculture quality.
Owner:JIANGSU UNIV

Mechanical soil-sampling device

ActiveCN102661875AEasy to sampleSampling is convenient and effectiveWithdrawing sample devicesEngineeringDrill
The invention discloses a mechanical soil-sampling device. The mechanical soil-sampling device comprises motors, a soil-sampling drill, a soil collection disc and a fixing box. A spiral inner groove is arranged at a lower end of the soil-sampling drill; outer edges of the spiral inner groove are provided with extended small flanges; the bottom end of the soil-sampling drill is processed into a cone-shaped drill head; an upper end of the soil-sampling drill is provided with a driven spur gear; the driven spur gear and a driving spur gear cooperate with each other thereby moving; the driving spur gear is installed on a main shaft of a first decelerator; the first decelerator is connected to an output shaft of a first motor; the main shaft of the first decelerator is fixedly connected to the upper end of the soil-sampling drill; the soil-sampling drill vertically and rotatingly move to pass through one of soil collection chambers; a baffle is installed in the fixing box and is located above the soil collection disc; and an end of the baffle extends into the spiral inner groove of the soil-sampling drill. The mechanical soil-sampling device has the advantages of convenient use, reliable running, simple structure, high efficiency and good applicability.
Owner:ZHEJIANG UNIV OF TECH

Agricultural and animal product nondestrctive detection method based on electronic visual sense and smell sense fusion technology and its device

Images of farm animal products taken by CCD camera through image acquisition card are transferred to computer. Under certain condition (temperature, humidity and flow rate), smells emitted from farm animal products through mini pump with no oil are sucked into reaction chamber, where signals are generated by array of gas sensor. The said signals through conditioning circuit, A / D acquisition card are transferred to computer. Computer for simulating human brain to treat vision data and smell data carries out syncretizing and pattern recognition processing. Combining with experts' knowledge in knowledge base as well as experiences, computer makes judgment for qualities of garden spgarden stuff, meat and corns etc. synthetically.
Owner:JIANGSU UNIV

Mechanical type soil sampling apparatus

The invention relates to a soil sampling device for measuring the bulk density of soil. The invention adopts a mechanical soil sampling device which is provided with a machine frame, wherein one end of the machine frame is provided with a longitudinal cutting mechanism, the middle part of the machine frame is provided with a soil sampler bracket, the bracket is provided with a soil sampler, and the other end of the machine frame is provided with a transverse feeding mechanism. The soil sampler is composed of a soil sampling pipe, a ring-shaped cutter, a soil sampling pipe shoe and a cutter-pushing ring, wherein the interior of the soil sampling pipe is provided with a plurality of ring-shaped cutters, one end of the ring-shaped cutter in the soil sampling pipe is provided with the cutter-pushing ring, a gap is arranged between the soil sampling pipe and the ring-shaped cutter, one end of the soil sampling pipe is provided with a convex ring matched with the soil sampler bracket, the other end of the soil sampling pipe is provided with the soil sampling pipe shoe, the soil sampling pipe shoe is connected with the screw thread of the outer wall of the soil sampling pipe, and the outer wall of the soil sampling pipe is provided with a scale. The invention has the advantages of the simple structure, the convenient use, the reliable operation, gaining a plurality of layers of soil sample once, the high efficiency, and ensuring the sampling quality.
Owner:CHINA AGRI UNIV

Microorganism aerosol sampling device

The invention relates to a microorganism aerosol sampling device which comprises a microorganism solution atomization generation device, a compressed air gasification device, a microorganism aerosol generation device and a sampling vessel, wherein the microorganism solution atomization generation device is connected and mixed with the compressed air gasification device and then connected with the front end of the microorganism aerosol generation device; the sampling vessel is connected onto the tail end of the microorganism aerosol generation device. According to the invention, the microorganism solution atomization generation device, the compressed air gasification device, the microorganism aerosol generation device and the sampling vessel are adopted, and through arrangement of quincuncial spraying holes and refining spray nozzles, the generation quality of microorganism aerosol is ensured; through arrangement of a boosting cylinder, a primary filter cartridge and a pressure stabilization cylinder, the quality and precision of air obtained through compression of the compressed air gasification device are ensured, and the generation quality of microorganism aerosol is further ensured; a sampling film and normal saline are adopted for sampling, so that the sampling quality and sampling rate are ensured, and the sampling capacity is improved.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)

Hydrogeological water quality sampling device and using method thereof

The invention discloses a hydrogeological water quality sampling device and a using method thereof. The device comprises a base, a sampling pipe and an electromagnetic valve, wherein the sampling pipeis connected to the upper end of the base through a clamping groove, a water inlet is formed in one side wall of the sampling pipe, the electromagnetic valve is connected to the water inlet through apipe hoop, and a cover plate is connected to the upper end of the sampling pipe through a clamping groove. The device has the beneficial effects that the structure is novel, and the operation is convenient; as the base, the cover plate, the sampling pipe and the electromagnetic valve are arranged, a large number of sampling specimens can be accommodated; water areas with different depths can be sampled, research data are enriched, the accuracy of research results is guaranteed, a sampling specimen can be protected by arranging a protection box, a floating plate, a box door and an electric push rod, meanwhile, the sampling specimen can be prevented from being polluted by external soil, air and the like in the lifting process, and the safety of the sampling specimen is guaranteed.
Owner:中煤地一七三勘探队涿州有限责任公司

Hydraulic fixing type sampler and sampling method thereof

The invention provides a novel hydraulic fixing type sampler and a sampling method thereof. The sampler comprises the following components from up to bottom in order: a drill pipe joint, an annular sealing cap, a vacuum inner pipe, an annular piston, a cylinder, a piston rod, a fixing pipe, a fixing ring, a top board and a sampling pipe; a cylinder is internally distributed with a pressure releasehole and a drain hole; a hydraulic transmission system is connected with a sampler at the upper part of the drill pipe joint through a drill pipe. The novel hydraulic fixing type sampler has the advantages of simple structure, rapid sampling speed, simple operation, high sampling quality, and low sampling cost; and a prospecting tool for civil engineering ground investigation.
Owner:SOUTHEAST UNIV

Detection method and detection kit for oligonucleotides of leukemia MEF2D-BCL9 fusion gene at different sites

The invention relates to a detection method and kit for oligonucleotides of a leukemia MEF2D-BCL9 fusion gene at different sites. The kit comprises a detection system PRC reaction solution, a primer pair, probes, a positive control and a negative control. A Taqman probe technology in real-time fluorescence PCR is used for detecting the expression condition of the MEF2D-BCL9 fusion gene in a patient and performing more accurate screening and identification on high risk groups, the kit has good specificity and high sensitivity, and the method has the characteristics of convenience and high efficiency.
Owner:ZHUJIANG HOSPITAL SOUTHERN MEDICAL UNIV +1

Underground water stratified sampling device and use method thereof

According to an underground water stratified sampling device and the using method thereof, impurities can be prevented from being attached to the outer side of a filtering structure through rotation of an external structure, the problem of blockage of filtering holes is effectively solved through cooperation with a mesh blockage clearing structure, the normal water pumping efficiency during sampling is guaranteed, and meanwhile through a sampling mode of time division mistake, permeated mixed groundwater is conveniently isolated after comparison and sampling quality is ensured. The device is characterized in that the cross section of a lifting mechanism is triangular, a traction rope is arranged in the lifting mechanism through a pulley, one end of a connecting rod is fixedly arranged at the end of the traction rope, an upper sealing air bag is arranged in the middle of the connecting rod in a penetrating mode. A pressurizing air pipe is fixedly arranged at the top of the upper sealing air bag, a fixing plate is fixedly arranged at the other end of the connecting rod and is of a circular plate-shaped structure, at least six electric expansion pieces are circumferentially arranged at the bottom of the fixing plate, the bottoms of the electric expansion pieces are connected with a sampling barrel through piston rods, and the sampling barrel is hollow.
Owner:INST OF HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CHINESE ACAD OF GEOLOGICAL SCI

Myriametre-scale deep sea autonomous bottom sediment detecting and obtaining device

The invention relates to the technical field of deep sea sampling, in particular to a myriametre-scale deep sea autonomous bottom sediment detecting and obtaining device. A sampling cavity is arranged along the vertical direction, and an upper end cover and a lower end cover are respectively arranged at an opening formed in the upper part of the sampling cavity and an opening formed in the lower part of the sampling cavity; the upper end cover is connected with the upper end of the sampling cavity by a spring; an acoustic release transponder is fixedly arranged in a main body frame, and comprises a release device I and a release device II; a fixed end of the upper end cover is hinged to the sampling cavity, and a free end of the upper end cover is connected with the release device I by a thin mooring rope; a load rejection balancing weight is arranged under the main body frame, and is connected with the release device II by a hook; the lower end cover comprises a rotary bracket and a sealed spring sheet; one end of the rotary bracket is hinged to the upper end of the sampling cavity, and the other end of the rotary bracket is fixedly provided with the sealed spring sheet; the rotary bracket is connected with the release device I by a thin mooring rope. The myriametre-scale deep sea autonomous bottom sediment detecting and obtaining device has autonomous floating ability, can dive by loading the balancing weight, and touches the sea bottom for sampling by means of gravity; the device is easy to manufacture, low in production cost, simple and convenient to install, high in efficiency, safe and reliable.
Owner:NAT DEEP SEA CENT

Seawater sediment pore water sampling device

The invention provides a seawater sediment pore water sampling device. According to the seawater sediment pore water sampling device provided by the invention, sampling of deep-sea sediment pore watercan be effectively realized, a sampling pipe requires not to return an initial position after sampling is completed, sample recycling can be realized by directly lifting up the seawater sediment porewater sampling device, samples are enabled not to be polluted during recycling of the seawater sediment pore water sampling device, and the sampling operation is simplified. The technical scheme is characterized in that the seawater sediment pore water sampling device comprises an outer sleeve, an isolation sleeve and a sampling pipe assembly, wherein two ends of the sampling pipe assembly are sealed; through holes are formed in the side wall of the sampling pipe assembly; first one-way valves are arranged in the through holes; the first one-way valves are capable of enabling a sample outsidethe sampling pipe assembly to enter the inner part of the sampling pipe assembly; the isolation sleeve is arranged outside the sampling pipe assembly in a sleeving way; the outer sleeve is arranged outside the isolation sleeve in the sleeving way; the sampling pipe assembly and the isolation sleeve as well as the isolation sleeve and the outer sleeve can be in coaxial relative movement; an annular boss is arranged on the inner wall of the outer sleeve; the inner wall of the annular boss is fitted with the outer wall of the isolation sleeve; a limiting device is arranged on the outer wall of the isolation sleeve and is used for limiting the annular boss.
Owner:WUHAN PENESON GEOLOGICAL SURVEY TECHNICAL CO LTD

Offline information setting method and device for realizing event conversion probability prediction

The invention discloses an offline information setting method and device for realizing event conversion probability prediction. The method comprises the steps of obtaining event occurrence probabilities corresponding to a plurality of first event conversion probability prediction samples in a first sample set; compressing the feature space formed by the features contained in the plurality of firstevent conversion probability prediction samples to obtain a plurality of second event conversion probability prediction samples to form a second sample set; according to the event occurrence probability, screening out a second event conversion probability prediction sample of which the event occurrence probability meets a predetermined requirement from a second sample set; generating a predictionset according to the screened second event conversion probability prediction samples; predicting the event conversion probability of each event conversion probability prediction sample in the prediction set, and forming offline information for predicting the event conversion probability. According to the invention, offline information used for predicting the event conversion probability can be generated rapidly and conveniently, so that the probability of further conversion of the to-be-predicted sample can be improved.
Owner:KE COM (BEIJING) TECHNOLOGY CO LTD

Vacuum centrifugal machine

PendingCN111185309AConsistent centrifugal effectAvoid sex changeCentrifugesRotational axisEngineering
The invention discloses a vacuum centrifugal machine, and belongs to the technical field of centrifugal machines. The vacuum centrifugal machine comprises a centrifugal machine body, a rotor and a vacuum pump. A centrifugal cavity is formed in the centrifugal machine body. The rotor is arranged in the centrifugal cavity and provided with a plurality of containing grooves. Hanging baskets are clamped in the containing grooves and used for containing to-be-centrifuged samples and can centrifuge the multiple samples at the same time without mutual interference. The distances between the hanging baskets and the rotating axis of the rotor are the same, so that the centrifugal effect of all the samples is consistent, the centrifugal efficiency is high, and installing and using are convenient. The vacuum pump is connected with the centrifugal machine body and used for pumping and draining gas in the centrifugal cavity, so that the temperature in the centrifugal cavity is lowered, the degeneration of the samples is prevented, and the quality of the centrifuged samples is ensured. The vacuum centrifugal machine is high in efficiency, the quality of the samples is not affected before and after centrifuging, the centrifugal effect is good, and the internal structure and installation are simple.
Owner:广州高盛生物科技有限公司

Frequency domain-based frequency spectrum data cleaning method in civil aviation very high frequency communication

The invention discloses a frequency domain-based frequency spectrum data cleaning method in civil aviation very high frequency communication, and relates to the field of civil aviation radio signal processing, and the method comprises the steps: S1, carrying out the smooth processing of an original frequency spectrum signal, and obtaining a first frequency spectrum signal; s2, roughly judging whether noisy signals of all frequency points exist or not; s3, counting the maximum value position of each frequency point in the first frequency spectrum data in a frequency domain; s4, screening the spectrum data of the corresponding frequency points; s5, slicing and recombining all frequency point data and forming tensors; after data cleaning is carried out on the frequency spectrum data, frequency spectrum prediction data with higher quality can be obtained, so that the quality of a frequency spectrum data sample for subsequently training an intelligent frequency spectrum prediction neural network model is ensured, and the prediction capability of the intelligent frequency spectrum prediction neural network in a complex electromagnetic environment is improved; finally, the purpose of improving the accuracy and reliability of intelligent spectrum occupancy prediction is achieved, and important technical support is provided for improving the very high frequency voice communication frequency utilization rate of an airport terminal area and guaranteeing the aviation operation safety of the airport terminal area.
Owner:三亚航空旅游职业学院

A gas-propelled underground fluid layered sampling device

The invention discloses a gas pushing type underground fluid stratified sampling device. The end port of a simple packer system is inserted into a pipe of a shaft system to perform embedding and fixedly riveted with the pipe through screws to form an integral cylindrical structure. The integral cylindrical structure is buried in the stratum through drilled holes, and a guide pipe in the integral cylindrical structure penetrates through small holes preserved in simple packers to be connected with a U-shaped pipe underground fluid sample feeding system. The guide pipe penetrates through the small hole preserved in a first simple packer to be connected with a gas phase filter and a gas phase check valve of a soil gas sampling system and penetrates through the first simple packer to be connected with a needle valve on the ground and a fluid sampling container. A gas pushing type ground fluid sampling system penetrates through the small hole preserved in the first simple packer to be connected with the U-shaped underground fluid sample feeding system. The gas pushing type underground fluid stratified sampling device is ingenious and novel in structure, low in cost, excellent in durability, strong in field adaptability, wide in application fields, strong in project demands and good in application prospect and commercial value.
Owner:INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI

Electric control constant-temperature asphalt fume sampling gun

The invention discloses an electric control constant-temperature asphalt fume sampling gun, and belongs to the field of sample collection. The gun comprises a shell, wherein a horizontal rotating shaft is rotationally connected to the bottom of the shell, right threads are fixedly connected to the right side of the horizontal rotating shaft, the outer sides of the right threads are in threaded connection with a right rotating sleeve, the left side of the horizontal rotating shaft is fixedly connected with left threads, the outer sides of the left threads are in threaded connection with a leftrotating sleeve, the left threads and the right threads are same in thread pitch and opposite in spiral direction, inclined rotating rods are rotationally connected to the upper side of the left rotating sleeve and the upper side of the right rotating sleeve, limiting sliding grooves are formed in the middles of the left side and the right side of the inner wall of the shell, a limiting sliding block is slidably connected inside each limiting sliding groove, and a horizontal sliding plate is fixedly connected between the limiting sliding blocks on the two sides. Compared with the prior art, the gun has the beneficial effects that structure is simple, use is convenient, during use, asphalt is heated through a heating supporting plate made of a ceramic material, it is guaranteed that the heating temperature of the asphalt is stable, so that the sampling gun can accurately sample asphalt fume at the temperature of 42 + / -10 DEG C, and the sampling quality is ensured.
Owner:江西索立德环保服务有限公司

Impact power head and audio frequency power head integrated vehicle-mounted drilling machine

The invention discloses an impact power head and audio frequency power head integrated vehicle-mounted drilling machine. The drilling machine comprises a power driving device, a connecting device anda power head device. The power driving device is connected with the connecting device and the power head device. The power head device is connected with the connecting device, and the connecting device can be used for adjusting the state of the power head device. The power head device comprises an audio frequency drill bit and an impact drill bit. When the drilling machine works, the two kinds ofdrill bits can be switched to be used, the defects that when a direct push type technology is adopted, the sampling depth is small and the stratum adaptability is poor are overcome, and the defect that when a single audio frequency technology is adopted, the sampling price is high is also overcome; and under the condition that the maximum stratum adaptability, sampling quality and sampling depth are ensured, optimization of economy and maximization of efficiency can be achieved.
Owner:南京贻润环境科技有限公司 +1

Preparation method of metallographic specimen of oriented silicon steel continuous casting billet

The invention relates to a preparation method of a metallographic specimen of an oriented silicon steel continuous casting billet. The preparation method comprises the following steps: 1) performing blank processing; 2) performing acid etching; 3) preparing mixed powder; 4) sample loading; 5) mounting a sample; 6) grinding the sample; 7) roughly polishing the sample; 8) finely polishing the sample. The metallographic specimen is inlaid by adopting mixed powder consisting of micron-sized metal powder and micron-sized bakelite powder; in the sample preparation process, it is ensured that microcracks of oriented silicon steel are filled with molten mixed powder inserts, the cleanliness of a polished surface cannot be affected by the microcracks in the subsequent sample grinding and polishingprocess, and therefore the quality of a metallographic sample is ensured; the polished metallographic specimen can be directly subjected to inclusion observation or structure observation after corrosion, and an accurate analysis result is provided for scientific research and production.
Owner:ANGANG STEEL CO LTD

Sampler for chemical petroleum low liquid level sampling

The invention discloses a sampler for chemical petroleum low liquid level sampling, which comprises a sample storage cylinder, a sealing cover body, a liquid inlet adjusting assembly and a traction rod assembly, wherein the sealing cover body is coaxially arranged with the sample storage cylinder, the liquid inlet adjusting assembly is connected with the sample storage cylinder in a relative sliding manner through the sealing cover body, the traction rod assembly is fixedly connected with the sample storage cylinder; the sample storage cylinder, the sealing cover body, the liquid inlet adjusting assembly and the traction rod assembly form a sampler body; the liquid inlet adjusting assembly is used for controlling a petroleum sample entering the sample storage cylinder, and the traction rodassembly is used for being connected with an external traction device. The sampler of the invention is convenient for workers to carry on the premise of ensuring the collection quality of petroleum samples, thereby effectively ensuring the working efficiency of the workers; in addition, the sampler body is designed in a split mode, so that the sampler body can be conveniently cleaned in all directions, and the accuracy of experimental data is effectively guaranteed.
Owner:孙佳楠

Switching-on control method and switching-on control circuit for alternating-current switch of grid-connected inverter

The invention provides a switching-on control method for an alternating-current switch of a grid-connected inverter. The switching-on control method comprises the following steps: real-time sampling is performed on power grid voltage and inversion current; coordinate transformation is carried out on the power grid voltage and the inverter current to obtain a voltage component and a current component; the current component is processed through a virtual impedance loop to obtain a corresponding output current component; the voltage component of the power grid voltage and the output current component are superposed to obtain a modulated wave component; coordinate transformation is carried out on the modulated wave component to obtain a multi-phase power grid voltage modulated wave, and pulsewidth modulation is carried out on the multi-phase power grid voltage modulated wave to generate inverter circuit drive; the voltage difference between the voltages at the two ends of the AC switch and the power grid voltage is determined to be within the preset range, the AC switch is controlled to be switched on, the problem that the AC switch has no impact current is solved, and the technical problem of large open-loop control inductive current is solved.
Owner:GOODWE (GUANGDE) POWER SUPPLY TECH CO LTD

Device and method for making vibration reduction clad sheet steel T-shaped peeling strength sample

ActiveCN109490198ATruly reflect the peel strength valueImprove flatnessUsing mechanical meansMaterial analysisSheet steelMaterial removal
The invention relates to a device and a method for making a vibration reduction clad sheet steel T-shaped peeling strength sample, comprising a rack, wherein an electronic control vise, a damping bonding material removal device and a bent T-shaped device which are all fixed on the top surface of the rack; the electronic control vise is located between the damping bonding material removal device and the bent T-shaped device; a PLC is fixed on the rack; the PLC stores a control program for making the vibration reduction clad sheet steel T-shaped peeling strength sample; the PLC executes the control program, the electronic control vise clamps a to-be-clamped sample, a band saw blade on the damping bonding material removal device gradually removes part of the damping bonding material downwards, a spile oscillating deck on the bent T-shaped device is inserted into a cavity, with damping bonding material removed, of the to-be-made sample, and and bends steel plates at two sides of the to-be-made sample. For the sample made by adopting the technical scheme, the remaining damping bonding material and the steel plate retain the original state, the steel plates at two sides are bent symmetrically, and the T-shaped surface flatness is good.
Owner:济南恒辰机械配件有限公司

Surface water sampling device for water quality detection

The invention discloses a surface water sampling device for water quality detection. The device comprises a cylinder body, a telescopic mechanism positioned in the cylinder body and an opening mechanism positioned on one side of the cylinder body. Compared with the prior art, the surface water sampling device for water quality detection adopts a telescopic spring to ensure that a cover body shields an opening, so that when the device enters water, surface water cannot enter a water storage layer; a floating ball in a second cavity is lifted upwards after being stressed, the telescopic spring is pressed to bend a bending mechanism, a second connecting rod is pushed to move rightwards to drive the cover body and a communicating pipe to move rightwards to open the opening in the communicatingpipe, so that the communicating pipe communicates with a water inlet passage, water enters the water storage layer through the opening mechanism, and the device is reasonable in structure, has a delayed sampling function, guarantees the water sampling quality and is suitable for popularization.
Owner:烟台市帅恒机械科技有限公司

Extensible large-scale biomedical sample management and visualization platform

The invention is an extensible large-scale biomedical sample visualization platform. The platform comprises a sample statistics module, a visualization module, a retrieval module and a mongodb database system. And the user logs in the platform to carry out identity and authority verification, and after the user completes the authority verification, the user adds data information to the platform and uploads the data information. And carrying out quality inspection on the added data information, and storing the data information passing the quality inspection into a mongodb database system. And the user comprehensively retrieves the sample information existing in the mongodb database through multiple conditions, and checks the statistics of the retrieval result. And after the retrieval is completed, the platform counts the sample search results and presents the sample search results to the user in the forms of a visual chart and the like. Aiming at mass biomedical samples, more convenientdistributed deployment and extensible storage are realized, more convenient operation can be provided, and the biomedical sample management and use efficiency is greatly improved.
Owner:HARBIN INST OF TECH

Riverbed sampling device

The riverbed sampling device comprises a machine body, and sliding grooves and the like are formed in the left side and the right side of the machine body. According to the invention, batch sediment particle image collection can be carried out. According to the invention, the images can be quickly and efficiently spliced, the definition and contrast of the spliced images can be obviously improved,the image data rate is greatly reduced, the sediment particle image information is accurately acquired, and the effect of conveniently ensuring the sampling speed by workers is achieved by improvingthe stability, so that the effect of improving the working efficiency is achieved.
Owner:叶官兵

A real-time sampling device for coalbed methane production well packing methane detection and its application

The invention provides a real-time sampling device for detection of methane at a packing of a coalbed gas production well and application thereof. The sampling device is a columnar methane trapping device, wherein the columnar methane trapping device is formed by combining a left half column body and a right half column body in a sealing way; one side of each of the two half column bodies is connected by a hinge at the sealed combining part, and the other side of each of the two half column bodies is connected by an openable latch to form the columnar methane trapping device in a sealed combining way; each of the two half column bodies is respectively provided with an upper bottom surface and a lower bottom surface, and the inner edge line of the upper bottom surface or the lower bottom surface of each of the two half column bodies is respectively provided with a groove; after the two half column bodies are combined in a sealing way, the grooves on the inner edge lines of the upper bottom surfaces of the two half column bodies are combined into a circular hole, and a water suction rod of an oil pumping unit penetrates through the circular hole; the grooves on the inner edge lines of the lower bottom surfaces of the two half column bodies are combined into the other circular hole, and a casing of the production well penetrates through the circular hole. The real-time sampling device for detection of methane at the packing of the coalbed gas production well has the advantage that the field detection is rapid, quick and real-time.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1

A Dual Hydraulic Pump Cooling Circulation Pressure Keeping System for Pressure Keeping Transfer

The invention relates to the technical field of hydraulic transmission and the technical field of cooling circulation and aims to provide a cooling-circulation pressure maintaining system provided with two hydraulic pumps and used for pressure-maintained transferring. The cooling-circulation pressure maintaining system comprises a cooling system, an electromagnetic valve system and a circulation pressure maintaining system, wherein the cooling system, the electromagnetic valve system and the circulation pressure maintaining system are connected through pipelines. The cooling system comprises acooling device, a cold water box and a first refrigerator. The electromagnetic valve system comprises a first two-position and two-way electromagnetic valve, a second two-position and two-way electromagnetic valve, a third two-position and two-way electromagnetic valve and a fourth two-position and two-way electromagnetic valve. The circulation pressure maintaining system comprises a pressure-maintained transferring system and a secondary pressure-maintained transferring system. According to the cooling-circulation pressure maintaining system provided with the two hydraulic pumps and used forpressure-maintained transferring, the functions of pressure maintaining and temperature control of natural gas hydrate samples are integrated, the two most important parameters for in-situ maintaining of the natural gas hydrate samples are ingeniously controlled, and the cooling-circulation pressure maintaining system is high in novelty and has important reference significance for subsequent designing of a natural gas hydrate sample transferring system.
Owner:ZHEJIANG UNIV

Locking switch driving mechanism and multistage mechanical cooperation type passive intelligent lock

The invention belongs to the technical field of locking accessories, and particularly relates to a locking switch driving mechanism and a multistage mechanical matching type passive intelligent lock.The locking switch driving mechanism comprises a linear moving block and a servo driving assembly, and the servo driving assembly comprises a servo motor, a limiting moving frame and a transmission part; the transmission part is arranged at the output end of the servo motor, the limiting moving frame is arranged at the output end of the transmission part, and the limiting moving frame can be connected with the linear moving block in a clamped mode; the transmission component comprises a rotating shaft and a guide spring, the limiting moving frame is rotationally connected to the rotating shaft, a guide protruding block is arranged on the circumferential side wall of the rotating shaft, the rotating shaft is sleeved with the guide spring, the two ends of the guide spring abut against the limiting moving frame, and the guide protruding block is slidably connected with a threaded groove of the guide spring. A rotating shaft with a protruding block and a spring structure are adopted to simulate a lead screw transmission system, and the situation that the movement path of the switch is affected by deviation of the output end of a linear mechanical telescopic driving structure is avoided.
Owner:GUANGZHOU JINYUDA LOGISTICS CO LTD +1

Net rack type soil test automatic sample separation device

A net rack type soil test automatic sample separation device comprises a steel wire soil cutting net rack, an electric push rod, a combined support and a control cabinet. The steel wire soil cutting net rack consists of a net rack and a plurality of steel wires; the steel wire soil cutting net rack is arranged over the top of the control cabinet and horizontally installed at the piston ends of themultiple vertically-arranged electric push rods. The fixed end of the electric push rod is installed on the control cabinet, the combined support is installed at the top of the control cabinet and corresponds to the steel wire soil cutting net rack up and down, a gap corresponding to a steel wire of the steel wire soil cutting net rack is formed in the combined support, and a control switch and areset switch for controlling the electric push rod are arranged on the control cabinet. The steel wire soil cutting net rack, the electric push rod and the combined support are adopted for automaticcutting and sample separation, and compared with a traditional manual sample separation mode, the labor is reduced, the working efficiency is improved, the automation level of the geotechnical technology is improved, the separation requirements of samples of different sizes can be met, meanwhile, standardization can be achieved, and the sample quality is guaranteed.
Owner:SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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