65results about How to "Improve field applicability" patented technology

The invention discloses a method for evaluating the insulation state of electrical equipment. A matrix beam algorithm is utilized to identify equivalent circuit parameters of an expanded Debye model of the electrical equipment according to polarization and depolarization current for time-domain dielectric response of the electrical equipment, and then insulation state parameters such as a dielectric loss are calculated to evaluate the insulation state of the electrical equipment. The method comprises the following steps of firstly, measuring the polarization and depolarization current of the electrical equipment and then constructing a Hankel matrix by using the depolarization current as parameters; secondly, carrying out singular value decomposition on the Hankel matrix and judging a signal subspace and a noise subspace according to a singular value in a singular value curve in order to determine the number of relaxation branches and relaxation parameters of the expanded Dubai model;finally, using the determined relaxation branches for constructing the insulation-expanded Debye model of the electrical equipment and calculating the insulation state parameters such as the dielectric loss according to the model. Therefore, an accurate and reliable diagnosis method is provided for evaluating the insulation state of the electrical equipment.

The invention discloses an anti-swelling swelling shrinkage agent and a preparation method thereof, and solves the problem that the existing clay inhibitor cannot have anti-swelling and swelling shrinkage properties at the same time. The anti-swelling and swelling shrinkage agent provided by the invention is composed of 65ml of 30% hydrochloric acid, 100ml of 33% trimethylamine solution, 0.5g of a cetyl trimethyl ammonium bromide solid and 45g of an epoxy chloropropane liquid. The anti-swelling and swelling shrinkage agent not only has inhibiting effect on the expansion of clay, but also can shrink the expanded clay particles, so as to effectively improve the permeability of an oil reservoir.

The invention relates to a large-torque equal-wall-thickness screw drilling tool with motors in serial connection. The drilling tool is mainly composed of a by-pass valve assembly, an anti-falling assembly, a motor assembly, a cardan shaft assembly I, a hollow rotor motor assembly, a cardan shaft assembly II and a transmission shaft assembly; when the drilling tool works, drilling fluid flows to a power part, in the process that the high-pressure drilling fluid moves from an inlet of the motor to an outlet, the water power of the high-pressure drilling fluid is consumed to apply work to a hollow rotor, and the pressure energy of the drilling fluid can be converted into the rotating mechanical energy of the hollow rotor; under the cooperation functions of a solid rotor and the hollow rotor, the whole screw drilling tool weakens the sensitivity of the output rotational speed to the drilling pressure, and compared with an independent solid rotor motor or an independent hollow rotor motor, the drilling tool shows obvious superiority; in cooperation with a centralizer, the drilling tool achieves the function of transferring large torque at a place near a drilling bit, and is suitable for drilling large-displacement directional wells and horizontal wells.

The invention discloses a high-voltage single-core cable protective covering grounding online monitoring device and a control method. The high-voltage single-core cable protective covering grounding online monitoring device comprises an A phase current transformer, a B phase current transformer, a C phase current transformer, an A phase temperature sensor, a B phase temperature sensor, a C phase temperature sensor, a data collecting controller, a GPRS data transmission module and a monitoring device body. The high-voltage single-core cable protective covering grounding online monitoring device and the control method have the following advantages of being safe and reliable, strong in site adaptability and convenient and fast to use, and more specifically, diagnosis of grounding system faults is realized through the comparison of a grounding current monitoring value and a computed value, theoretical foundation and reference data for high-voltage cable operation monitoring are provided, so that cable accident risk is reduced, the safety and the reliability of city power grid operation are improved, and the probability that the cable grounding device is damaged is lowered to the minimum; the device is applicable to different types of grounding boxes with different grounding modes and mounting positions, has universal applicability, and is convenient to operate and simple and convenient to install; the cost of a cable terminal tower grounding system is greatly lowered, a detecting period is shortened, and manpower and material resources are saved.

Provided are a high-voltage single-core cable sheath grounding current on-line monitoring device and a control method. The high-voltage single-core cable sheath grounding current on-line monitoring device comprises an A-phase current transformer, a B-phase current transformer, a C-phase current transformer, a current data acquirer, a general packet radio service (GPRS) data transmission module and a monitoring device, wherein the A-phase current transformer, the B-phase current transformer and the C-phase current transformer are installed a sheath grounding layer ground wires of an A-phase single-core cable, a B-phase single-core cable and a C-phase single-core cable. Three input ends of the current data acquirer are connected with the A-phase current transformer, the B-phase current transformer and the C-phase current transformer respectively, and the output end of the current data acquirer is connected with the GPRS data transmission module. The GPRS data transmission module is connected with the monitoring device in a wireless mode. The high-voltage single-core cable sheath grounding current on-line monitoring device and the control method have the advantages of being safe, reliable, strong in site applicability, convenient and quick.

The invention discloses a method and a system for preparing a nitrogen-inhibiting vapor mist for preventing coal spontaneous combustion in an underground goaf. The system includes a water supply pipeline, a nitrogen injection pipeline, an inhibitor liquid storage tank, a suction hose, and an inhibitor adding device , spiral atomization device, observation hole and perfusion pipeline; the inhibitor adding device uses the principle of high-speed water jet vaporization to add the inhibitor accurately and quantitatively. This method ensures the stable and reliable addition of the inhibitor and overcomes the conventional addition method It is greatly affected by pressure fluctuations and the system is unstable; it has strong intrinsic safety in the underground, and the whole set of resistance vapor mist preparation device has the characteristics of small size, light weight, simple operation and high reliability. Assembly, movement and maintenance It is very convenient, greatly simplifies the operation of the preparation process of underground nitrogen gas resistance vapor mist, improves the field applicability of resistance gas mist fire extinguishing technology, and the large flow resistance vapor mist produced is very suitable for controlling coal spontaneous combustion hidden fires in underground goafs source.

The invention discloses a real-time measurement method and device for geometric parameters of an overhead line system based on a single monitoring camera, and relates to the technical field of overhead line system measurement. The method comprises an image input step, a pantograph positioning step, a pantograph slider contour extraction step, a contact line extraction step, an intersection point calculation step and a lead height and pull-out value calculation step. The method for measuring the geometric parameters of the overhead line system can be suitable for application scenes under different illumination conditions and different background conditions, the wire, the carrier cable and the dropper can be well distinguished, the requirements for the frame rate and pixels of a camera are reduced, and the geometric parameters of the overhead line system are accurately measured.

The invention relates to a combined PDC-thrust ball bearing long-life transmission shaft assembly. The combined PDC-thrust ball bearing long-life transmission shaft assembly comprises a transmission shaft, a lower TC movable sleeve, a lower TC static sleeve, a thrust ball bearing group, a PDC bearing group, an upper TC movable sleeve, an upper TC static sleeve and a transmission shaft shell, wherein the lower TC movable sleeve sleeves part of the shaft head of the transmission shaft; the lower part of the lower TC movable sleeve is connected with the transmission shaft; the lower TC static sleeve is mounted on the outer circumference of the lower TC movable cover in a matched manner; the lower TC static sleeve is connected with the lower end of the transmission shaft shell arranged at the outer circumference of the lower TC static sleeve; an anti-falling half ring, which is coaxial with the lower TC movable sleeve, is arranged at the upper end of the lower TC movable sleeve; the thrust ball bearing group and the PDC bearing group are sequentially mounted on the transmission shaft from top to bottom in a matched manner; the upper TC movable sleeve sleeves the upper part of the transmission shaft; the upper part of the upper TC movable sleeve is connected with that of the transmission shaft; the upper TC static sleeve is mounted on the outer circumference of the upper TC movable sleeve in a matched manner; a universal water-saving cap is also fixed at the upper end of the transmission shaft. The combined PDC-thrust ball bearing long-life transmission shaft assembly has the advantage that the overall service life of a screw drill can be effectively prolonged.

The invention relates to the technical field of pantograph anomaly detection, and discloses a pantograph slide plate unparallelism detection method. The method comprises the following steps: inputtingdifferent types of pantograph images in real time; performing filtering and denoising processing on the pantograph image through a Gaussian smoothing method; removing contour interference in the vertical direction through gradient calculation, conducting morphological processing and texture feature calculation, and extracting a pantograph image contour; screening out interference straight lines,carrying out straight line clustering judgment, and extracting a pantograph pan image; acquiring spatial geometrical characteristics of the skateboard according to the pantograph skateboard image, andjudging the abnormal state of the skateboard. The technical scheme is insensitive to a light source and is suitable for different illumination conditions; algorithm parameters are convenient to modify and can also be operated by non-professionals; the on-site applicability is high, and the method is suitable for extracting different types of pantographs under multiple different on-site conditions; the detection accuracy is high, and the false detection rate and the missing detection rate are low.

The invention discloses a method for rapidly modifying cellulose fiber by microwave and an application thereof. Functional molecules are grafted to the surface of crosslinked cellulose fiber by assisted microwave, the modified cellulose fiber containing a large amount of amine groups for adsorbing arsenic ions with a high adsorption capacity is prepared, and the modified cellulose fiber is used for arsenic pollution of underground water and conventional arsenic waste water treatment for effectively removing arsenic pollution in water body. The method can be used for rapidly preparing the biomass adsorption material with good on-site emergency disposal applicability and environmental friendliness; the cellulose fiber which is prepared by cellulose is used as a raw material, wherein a large amount of cellulose exists in the nature, so that waste is changed into valuables; the microwave-assisted method is used for modification, raw materials are saved and preparation time is greatly shortened, industrialization is easy to realize, and emergency disposal requirements are met.

The invention discloses a solar moth-killing lamp, which is characterized in that the top of a lamp body is provided with a solar photovoltaic panel, the lower end of the solar photovoltaic panel is provided with a photosensitive machine core box, the lower end of the photosensitive machine core box is provided with a LED ultraviolet lamp tube and a LED white light tube which are perpendicular and parallel to each other, the ultraviolet lamp tube and the white light tube are covered by a high-voltage fence, the lower ends of the tubes are provided with battery cases, and the lower end of the battery case is connected with a necro-insect collecting device. The invention has the advantages of adequately using the solar energy resources, realizing energy self-sufficiency because of generating and storing power in the daytime and using the power in the evening, enhancing the lethality of the high-voltage fence without pulling out the wires and carrying out manual custody, improving the field applicability, realizing environmental protection and energy conservation, and improving the deinsectization effect significantly because the solar moth-killing lamp is closed in the daytime and opened in the evening automatically and the lamp is a waterproof sealing protection device. The LED ultraviolet lamp tube and the LED white light tube are used for expanding the spectral range and increasing the species of trapped pests and the trapping effects thereof. The necro-insect collecting device arranged at the bottom of the solar moth-killing lamp can prevent the pests from escaping again, thereby enabling the killing and damaging performance of the lamp to be over 98 percent.

The invention discloses an unmanned-aerial-vehicle airborne tree-barrier clipping device, and belongs to the field of tree clipping. The unmanned-aerial-vehicle airborne tree-barrier clipping device comprises a multi-rotary-wing unmanned aerial vehicle, a power system, a control system, an insulation supporting rod, a transmission shaft, a reversing transmission device, an unmanned-aerial-vehicleconnecting frame and a cutter bit; the power system is fixedly arranged at one end of the insulation supporting rod, the reversing transmission device is fixedly arranged at the other end of the insulation supporting rod, the multi-rotary-wing unmanned aerial vehicle is fixed to the end, close to the power system, of the insulation supporting rod through the unmanned-aerial-vehicle connecting frame, a multi-rotary-wing unmanned aerial vehicle support is arranged on the multi-rotary-wing unmanned aerial vehicle, the transmission shaft penetrates through the insulation supporting rod, one end ofthe transmission shaft is connected with the power system, the other end of the transmission shaft is connected with the reversing transmission device, the cutter bit is connected below the reversingtransmission device, the control system is electrically connected with the power system, and the power system is also sued for driving the multi-rotary-wing unmanned aerial vehicle. The multi-rotary-wing unmanned aerial vehicle carries a custom electric saw to reach a high-altitude tree-barrier position, the power system drives the cutter bit to rapidly remove tree barriers or clip ultrahigh trees.

The invention discloses a roadside support method for a tight roof constant-resistance yielding roadway. A support device comprises a plurality of units of a split structure. Each unit comprises two parts of a constant-resistance yielding pad and a filler which are combined for use, wherein the constant-resistance yielding pad is an outer injection type single-body hydraulic supporting pillar which is provided with a short and thick plunger and of a deformation structure and is installed above the filler, and the sum of the highest lifting height of the constant-resistance yielding pad and the height of the filler is equal to the initial height of the roadway. Preset deformation control is carried out over a roof through the constant-resistance characteristic of the constant-resistance yielding pad; the roof is taken out in time when sinking to the compression limit of the constant-resistance yielding pad, and the filler is used for carrying out limiting deformation control over the roof. The roadside support method for the tight roof constant-resistance yielding roadway has the advantages of being good in adaptation deformation capacity, good in roadway forming performance, easy to operate, low in supporting cost, good in roadway safety and the like, and is particularly suitable for roadside support of the roadway with the tight roof in the gob-side entry retaining process.

The invention relates to a screw drill transmission shaft bearing which is used for petroleum drilling or workover and has long service life and high performance. The screw drill transmission shaft bearing improves the structure of a centripetal thrust ball bearing into the combination structure of each two or the three out of a centripetal thrust ball bearing, a centripetal cylindrical thrust bearing and a centripetal dual-truncated cone roller bearing. The screw drill transmission shaft bearing is characterized in that the screw drill transmission shaft bearing consists of the centripetal thrust ball bearing, the centripetal cylindrical thrust bearing and the centripetal dual-truncated cone roller bearing, or consists of the centripetal thrust ball bearing and the centripetal cylindrical thrust bearing, or consists of the centripetal thrust ball bearing and the centripetal dual-truncated cone roller bearing; each thrust bearing line consists of 15-35 rolling balls, rolling columns or dual truncated cones and corresponding internal rings and external rings of the bearing; each rolling column or the dual truncated cone is chamfered by a transition fillet; the end surfaces of the internal ring and the external ring of the bearing are chamfered by the transition fillet. The screw drill transmission shaft bearing can effectively increase the contact area between the contact pairs, reduces the contact stress, gains the bearing with flexible rotation and strong bearing capability, has simple structure and easy implementation, can greatly prolongs the service life of the bearing group and can be applied to oil and gas fields.

An auxiliary climbing tool of a steel pipe tower of an electric transmission line comprises a ladder stand pipe, installed on the side wall and according to the needed size, of drill holes; shackle seats are inserted into the drill holes in a welded and positioning mode, shackles capable of being vertically bent and with circular arc grooves are installed on the shackle seats through bolts, and meanwhile, positioning devices being composed of steel balls, springs and spring seats are further installed on the shackle seats; when the shackles are unbent, the steel balls of the positioning devices are exactly clamped into the circular arc grooves corresponding to the shackles, and unbent positioning is achieved; when the shackles are upwards bent, the steel balls of the positioning devices are also exactly clamped into the circular arc grooves, and bent positioning is achieved; and the drill holes are formed in the ladder stand pipe in a left-right symmetrical and vertically-staggered mode, hooks capable of directly hanging the ladder stand pipe on ladder stand shackles of an original steel pipe tower are fixed to the upper end of the ladder stand pipe through bolts, and a connecting pipe capable of connecting the multiple ladder stand pipes so as to form the assembly type auxiliary climbing tool is installed at the lower end of the ladder stand pipe.

The invention provides a welding repair method and system for a hub of a wind generating set. The method comprises the steps that a groove is machined in the crack position of the hub; a welding rod is baked; and the groove is directly subjected to filling welding through the baked welding rod.

The invention discloses a method for detecting the on-site three-dimensional imaging of a GIS center conductive member. The method comprises the following steps: 1, arranging an X-ray source and a detector on both sides of an object to be detected respectively, wherein the X-ray source emits X-rays with the intensity of I0, and the intensity of the X-rays is I after passing through the object to be detected to the detector; 2, carrying out synchronized translation of the X-ray source and the detector by a certain number of step Nt, conducting same measurements on each translation step, and measuring the intensity I0 of the X-rays emitting from the X-ray source and intensity I of the X-rays when the X-rays reach the detector; 3, setting the coefficient of linear attenuation, caused by the object to be detected, of the X-rays as Mu; 4, solving the linear attenuation coefficient Mu of each point of the cross section in a ray projection group to know the distribution of linear attenuation coefficient Mu so as to obtain the three-dimensional image of the cross section; 5, forming the three-dimensional spatial data and images of the object to be detected. A conventional digital radiographic testing equipment is adopted for conducting three-dimensional imaging of a GIS device without power failure and dismantling, and monitoring, controlling and measuring of the on-site condition of the GIS center conductive member are thus achieved.

The invention provides an on-line monitoring device for temperatures of grounding wires of high-voltage single-core cable sheaths, and a control method. The device comprises an A-phase temperature sensor, a B-phase temperature sensor, a C-phase temperature sensor, a temperature data acquisition device, a GPRS (General Packet Radio Service) data transmission module and monitoring equipment, wherein the A-phase temperature sensor, the B-phase temperature sensor and the C-phase temperature sensor are mounted on the grounding wires of the A-phase single-core cable sheath, the B-phase single-core cable sheath and the C-phase single-core cable sheath respectively; three input ends of the temperature data acquisition device are connected with the A-phase temperature sensor, the B-phase temperature sensor and the C-phase temperature sensor respectively; an output end of the temperature data acquisition device is connected with the GPRS data transmission module; the GPRS data transmission module is wirelessly connected with the monitoring equipment; and the monitoring equipment comprises a monitoring computer and a mobile phone terminal which are arranged in a power grid monitoring center. The on-line monitoring device for the temperatures of the grounding wires of the high-voltage single-core cable sheaths, and the control method have the following advantages of safety, reliability, high field applicability, convenience and rapidity.

The invention relates to the technical field of cable fault monitoring, in particular to a cable joint monitoring system based on a multi-parameter sensing explosion-proof box. An acquisition module is arranged in the explosion-proof box and is connected with a processing module through a transmission module, and the acquisition module comprises a temperature sensor and a pressure sensor, which are respectively used for acquiring the surface temperature of the cable joint and the pressure in the explosion-proof box; the communication data line is connected with the acquisition modules and the converter, and the wireless transmitter and the wireless receiver are respectively connected with the converter and the upper computer. The explosion-proof box is arranged at a cable joint section to ensure the safety of a cable joint, and the electronic tag and the sensor arranged on the explosion-proof box are matched to monitor the temperature, the pressure and the physical position characteristic quantity of the cable intermediate joint, so the middle box body and the end box body of the fault monitoring explosion-proof box for sensing the multi-parameter state of the joint are connected through the flexible part; therefore, the cable bending device can meet the requirement for the bending environment of on-site cables, and is easy to mount and dismount, convenient to operate and high in on-site applicability.

The invention discloses an ash conveying system of a coal-fired power plant. The system comprises a plurality of ash buckets, a bin pump feeding valve, a first ash discharging connecting pipe which isconnected to the bin pump feeding valve, and a bin pump ash storing tank, wherein a compressed air connector is arranged on the bin pump ash storing tank; a discharging valve is arranged on the bin pump ash storing tank; a pressure ash conveying pipe is connected to a plurality of discharging valves and a pneumatic conveying ash storage; a first discharging valve is arranged at the bottom part ofthe pneumatic conveying ash storage; an additional ash conveying bypass system is mounted on an original bin pump type pneumatic ash conveying system, namely, the additional ash conveying bypass system is connected to a tooth cable type ash conveyor; the plurality of ash buckets for collecting coal ash of an electric dust collecting device are connected to the tooth cable type ash conveyor; an output port is formed in one end, far away from the plurality of ash buckets, of the tooth cable type ash conveyor; an automatic constant-force tensioning device is arranged at one end, far away from the output port, of the tooth cable type powder conveyor; and an extending section out of a section where a sealing box body is connected to each ash bucket is upwards inclined. With the adoption of theash conveying system of the coal-fired power plant, the electricity consumption cost is greatly decreased, and moreover, the production can be normally carried out without being influenced in the repairing period.

The invention relates to the technical field of soil heavy metal pollution remediation, in particular to a method for removing soil heavy metal by utilizing agricultural and forestry waste leaching liquor. The agricultural and forestry waste leaching solution is used as a leaching solution for removing heavy metals in the polluted soil, wherein the agricultural and forestry waste leach liquor is obtained by leaching agriculture and forestry waste with water or citric acid. The agricultural and forestry wastes are selected as leaching remediation raw materials, so that the method has the advantages of low cost, environmental protection, high efficiency, short remediation period, no damage to the soil environment and the like, and remediation of the heavy metal contaminated soil and resource recycling of the agricultural and forestry wastes are realized; meanwhile, the risk of secondary pollution of the leaching waste liquid to the soil or underground water is solved by utilizing the leaching residues, and conditions are created for environment-friendly integrated rapid repair and application of the heavy metals in the farmland soil-waste liquid.

The invention relates to an injurious insect automatic induction detection system and belongs to the injurious insect monitoring field. The system is mainly composed of a current induction device, a motor driving operation device, a circuit adjusting device, a cyclic cleaning device, an error elimination device, a signal recognition device, a data statistics output device and a human body safety current-limiting device. The injurious insect automatic induction detection system is characterized in that the system carries out target object recognition and counting through comparing the current induction values of different substances with the induction set values of target objects. The system has the advantages of high sensitivity in automatic induction, accurate data statistics, firm structure, stable performance and high applicability to field, and can satisfy actual needs of injurious insect monitoring and facilitate the launch of injurious insect prevention and control.

The invention relates to a strip steel sewing machine tool which comprises a rack, an upper stamping mechanism, a lower stamping mechanism and a flattening mechanism. According to the strip steel sewing machine tool, automatic and rapid sewing of strip steel on a cold rolling continuous production line is achieved, the operation efficiency and safety are improved, the labor intensity of manual welding and sewing is relieved, the production preparation time is shortened, and the productivity is improved. Strip steel sewing is conducted in a cold machining stamping mode completely, punching flanging and flattening are achieved through a servo motor and an electric cylinder, light, heat, noise and smoke dust pollution are not generated in the machining process, fluid under pressure is not needed, and the field applicability is higher. In the sewing process, an upper punching head, a lower punching head and a flattening head of different specifications and sizes can be selected and switched according to the minimum bending radius of the sewn strip steel on roller equipment of a production line, and it is guaranteed that the strip steel does not leave a scratch on the roller surface while riveting is conducted.

According to the assembly method of the interference fit steel ring structural member, proper sharp-nose pliers and wrenches are selected according to the size of the clamping ring, and generally, the sharp-nose pliers and the wrenches with the same size are selected. The elastic opening steel ring is placed on the clamping ring, the sharp-nose pliers are used for breaking off the steel ring, the clamping ring is tightly sleeved with the steel ring, the wrench is used for assisting in pressing the steel ring, and after the steel ring is assembled to the boss of the clamping ring, the sharp-nose pliers and / or the wrench are / is used for knocking the steel ring into the groove of the clamping ring. According to the assembling method, complex feature assembling is completed only through the sharp-nose pliers, the wrench and the electric hand drill chuck. By means of the assembling method, for assembling of the interference fit steel ring structural parts, special clamps do not need to be manufactured, the technical effect of a complete set of tools can be achieved only through simple tools, the field applicability is high, the tools can be used at any time, and the problem that the machining efficiency is low due to the fact that the tools cannot move or are difficult to move is solved.

The invention relates to a high-voltage cable joint protection device. According to the technical scheme, the device comprises a protection shell and a protection cover, the edge of the protection shell is provided with a plurality of shell sealing rings, the protection shell is detachably connected with the protection cover, one side of the protection shell is provided with a first connector base, the other side of the protection shell is provided with a replacement groove, and a connector base assembly is inserted into the inner side of the replacement groove in a replaceable mode. The joint protection device has the beneficial effects that the protection shell and the protection cover achieve two-way or three-way cable fixing protection by replacing different connector base assemblies, the connector base assemblies are selected according to the number of field cable connectors and the mode of connector bases, and cable sheaths can be fixed through clamps or cable connectors; different types of cables are fixed through different connector connecting seats, the shell sealing ring and the replacement plate sealing ring ensure that the cable connector protection box body is sealed, waterproof and dustproof, the field applicability is high, different types of protection boxes do not need to be carried, and the field working efficiency is improved.

The invention discloses a multifunctional pest trap, which belongs to the field of pest monitoring, and its components include: an attracting device, an exterminating device, an insect collecting device and a cleaning device. Among them, a specific bait is placed in the lure device; the killing device is a horizontally placed double-layer grid structure, and has an independent counting function; the insect collecting device can adjust the number of insects collected according to needs; the cleaning device realizes the automatic cleaning of the insect killing grid. The invention realizes single trapping of target pests, has the characteristics of perfect counting function and high field adaptability.