347results about How to "Work reliably" patented technology

The invention belongs to the technical field of agricultural machinery, and particularly relates to an automatic artemisia selengensis planting machine which comprises a frame, a screening seedling feeding device, a screening seedling feeding power system, an eccentric wheel reciprocating intermittent planting mechanism and an advancing mechanism. The vehicle frame comprises a vehicle body, a seedling straightening baffle and a front end baffle, and the width of the vehicle body is 0.8-1.0 m; the four screening seedling feeding devices are all mounted on the seedling straightening baffle, and a seedling receiving funnel is arranged at the bottom of each screening seedling feeding device; the two eccentric wheel reciprocating intermittent seeding mechanisms are mounted on the top surface of the front-end baffle plate; the advancing mechanism comprises a plurality of farming wheels and a transmission system used for synchronously driving the farming wheels to rotate and the eccentric wheel reciprocating intermittent seeding mechanism to press seedlings. Due to the size design and the arrangement structure of the vehicle body, the whole machine is compact in structure, based on the fact that the width of an existing furrow surface in a greenhouse is 2-3 m, the compact type planting machine is highly matched with the working environment in the greenhouse, has enough operation space in the greenhouse, can efficiently execute automatic seeding operation, and is particularly suitable for small-scale planting of farmers.

The invention relates to an electric vehicle charging interface identification and positioning system for a charging robot. The system comprises a data acquisition module, a preprocessing module, a charging interface identification module, a positioning module, a posture estimation module, a control module, an environment adaptation module and an automatic learning module. According to the system, images and three-dimensional point cloud data of a vehicle are collected through a camera and a laser radar, the two-dimensional position of a charging interface is automatically recognized through preprocessing and a deep learning model, and the spatial position and posture of the interface are accurately positioned by combining a least square method with three-dimensional coordinates. The control module drives the mechanical arm to be in butt joint with the plug through PID feedback control and A * path planning, and automatic charging is achieved. And the environment adaptation module combines data enhancement and adaptive correction to improve the recognition stability of the system in complex environments such as illumination and background change. The method improves the recognition precision and real-time performance of the charging robot in different environments, and is suitable for an unattended automatic charging scene.

The invention discloses a target bounding box detection system and method based on a millimeter wave radar, and the system comprises a point cloud data generation module which collects a millimeter wave intermediate frequency signal through the millimeter wave radar, and generates the point cloud data of a target; the data optimization module is used for removing noise in the point cloud data by using a reflection saliency coefficient and enhancing the point cloud by using a cumulative matrix; the frame detection module is used for carrying out receiving end beam forming on the millimeter wave intermediate frequency signal to obtain a target reflection energy spatial distribution map, fusing the target reflection energy spatial distribution map and the optimized point cloud data to obtain a fused multichannel feature map, and inputting the fused multichannel feature map into a two-dimensional contour prediction neural network to obtain a two-dimensional contour image of the target; and finally detecting a bounding box of the target in combination with the optimized point cloud data. According to the method, the applicability and reliability of target bounding box detection are improved, and the method can reliably work in various environments with poor light conditions by utilizing millimeter wave radar related algorithm design.

The invention provides a high-reliability servo actuating device which comprises an actuator body, the outer end of a piston rod of the actuator body penetrates out of a connecting part at a port of the actuator body, a locking plate and a limiting thread sleeve are arranged on the outer side of the connecting part, and the locking plate can move in the length direction of the connecting part. A first limiting nut is further connected to the connecting position of the outer end of the piston rod and the connecting base in a screwed mode, an emergency centering groove is formed in the position, corresponding to the piston cavity, of the inner wall of a shell of the actuator body, an emergency centering opening is formed in the surface of the shell, and the emergency centering groove is communicated with the emergency centering opening through a centering channel arranged in the side wall of the shell. The device has the beneficial effects that the stroke is adjustable through the limiting screw sleeve and the locking plate; high-pressure oil can be led out of the shell through the emergency centering groove, and the requirement for the opening degree of a vector nozzle of an engine can be met.

The invention relates to a hypocycloidal pin gear speed reducer assembly, a speed reducer and application. The speed reducer comprises an input shaft system, a first output shaft system and a second output shaft system; the number ratio of rotors to stators of the input shaft system is N: (N + 1), the section contours of the rotors and the stators are equidistant lines of a pair of conjugated hypocycloids, the rotors do planetary motion in the stators, the rotors rotate around the centers of the rotors and revolve around the centers of the stators at the same time, and the speed ratio of rotation to revolution is (N + 1): N. An input shaft rotates at the revolution speed of the rotors. Output shafts in the first output shaft system and the second output shaft system are connected through splines on the shafts and rotate according to the difference between the rotation speed and the revolution speed of a rotor, the purpose of speed reduction is achieved, and the speed reduction ratio is N: 1; and the rotor and the stator are made of steel with the hardness of over HRC58. The hypocycloid pin wheel speed reducer has the advantages of being high in transmission efficiency, stable in operation and long in service life, the outer diameter of the hypocycloid pin wheel speed reducer is smaller than the allowable maximum outer diameter of an oil well shaft, the hypocycloid pin wheel speed reducer can be suitable for screw pump oil extraction, and the technical problem that a pin wheel speed reducer cannot be suitable for an oil well all the time is solved.

The double-track stepping type conveying mechanism comprises a track beam and a double-track track, the double-track track is horizontally installed under the track beam, a walking gap is formed in the extending direction of the double-track track, a double-track pulley hook penetrates through the walking gap from bottom to top, and a walking wheel matched with the double-track track is installed at the top of the double-track pulley hook through a pulley yoke; a poke rod capable of directionally reciprocating in the horizontal direction is arranged in the track beam, a wedge-shaped poke block is connected to the bottom of the poke rod, when the poke rod directionally moves in the extending direction, the wedge-shaped poke block can poke the pulley yoke to directionally move in a stepping mode, and when the poke rod reversely moves, the wedge-shaped poke block can deflect and reversely move to cross the pulley yoke. According to the double-track stepping type conveying mechanism, the carcasses can be conveyed one by one in the pre-cooling room in a stepping mode, the distance between the different carcasses is ensured, the conveying work efficiency is high, the quality of the carcasses can be ensured, and cross contamination between the carcasses is reduced.

The utility model belongs to the technical field of air-conditioning water heaters, in particular to a throttle valve of an air-conditioning water heater, which is characterized in that two parallel pipelines are arranged in a valve body, the first parallel pipeline comprises a first pipeline and a second pipeline, and a first capillary tube and a valve A are connected in the first pipeline; a valve B is connected in the second pipeline; the second parallel pipeline comprises a third pipeline and a fourth pipeline; a valve C is arranged in the third pipeline; and a valve D and a second capillary tube are connected in the fourth pipeline. The utility model further provides the air-conditioning water heater based on the air-conditioning water heater throttle valve. The throttle valve of the air-conditioning water heater and the air-conditioning water heater provided by the utility model are more energy-saving than an air-conditioning water heater system using solar energy, and are realized by installing the throttle valve and a pipeline at the tail end of a compressor pipeline of the air-conditioning water heater.

The invention relates to the technical field of warehouse logistics systems, in particular to an encircling type material box shuffling machine which comprises a machine frame and a controller installed in the machine frame, a driving assembly and a turnover assembly are installed on the machine frame, the output end of the driving assembly is fixed to the turnover assembly, a material box is arranged in the turnover assembly, and the turnover assembly is connected with the controller. A clamping assembly used for fixing the material box is arranged on the overturning assembly, and a clamping control assembly used for driving the clamping assembly is further arranged in the overturning assembly. According to the device, rapid and accurate clamping and overturning of the material box are achieved through an accurate controller instruction, in the process, automatic control over swing of the clamping jaw, rotation of the overturning assembly and starting and stopping of the motor is achieved, the links of manual operation are greatly reduced, the material processing speed is increased, the material processing efficiency is improved, and the labor intensity of workers is relieved. Meanwhile, the overturning shaft with the gravity center offset type rotating structure is adopted, small space can be occupied in the space layout, and the structure is simpler and more compact.

The invention discloses a double-tension-interval-based film feeding system for a multi-column packaging machine, which comprises a paper roll mechanism arranged at the bottom of a rack, and a paper film changing mechanism, a film feeding device, a swing shaft roller tensioning mechanism, a laser coding mechanism, a laser coding position adjusting mechanism and a damping mechanism are sequentially arranged at the downstream of the paper roll mechanism according to the film feeding direction, an encoder alarm device and a mark tracking photoelectric sensor mark position adjusting mechanism are further arranged on the machine frame. During working, the film feeding device pulls out a paper film from a paper film roll of the paper roll mechanism, and the brake shaft is braked by the brake block, so that the paper film forms a first tension interval between the paper roll mechanism and the film feeding device; the damping mechanism is located at the output end of the film feeding system, the paper film is wound in a swing tensioning roller shaft system of the swing shaft roller tensioning mechanism, and the swing tensioning roller shaft system droops under the action of gravity, so that the paper film forms a second tension interval between the film feeding device and the damping mechanism. The film feeding device can be matched with a multi-column packaging machine, can continuously feed films and is stable in tension.

The present invention relates to an automatic water profile observation system based on wave energy, belonging to the field of ocean observation technology. The system includes a water surface buoy unit, a cable and a weight connected in sequence, and the cable is provided with two baffles respectively located at the upper and lower ends of the cable and an automatic profile observation platform located between the two baffles; the automatic profile observation platform is used to monitor ocean parameters, and it has two cams relatively arranged on both sides of the cable, a vertically arranged slide cylinder and a slide rod arranged in the slide cylinder, and the two cams are connected to the slide rod. When the slide rod moves up and down, the slide rod drives the raised ends of the two cams to clamp or release the cable, and the side wall of the slide rod is provided with an elastic protrusion structure, and the inner wall of the slide cylinder is provided with a limiting structure. The limiting structure and the elastic protrusion structure cooperate with each other to limit the movement of the slide rod, and always keep one end of the slide rod extending from the slide cylinder and able to collide with the baffle. The system is suitable for a wide range of water monitoring needs.

A physical information machine learning design method of a multi-component composite high-thermal-conductivity filler belongs to the technical field of composite high-thermal-conductivity filler design, and comprises the following steps: S1, establishing a material intrinsic attribute data set; s2, establishing a three-dimensional space closest packing model; s3, setting boundary constraint conditions; s4, optimizing a machine learning algorithm; and S5, carrying out proportion conversion. According to the method, an existing machine learning technology is utilized, a comprehensive data set is constructed, a machine learning algorithm is applied, the porosity is reduced and heat conduction paths are increased through accurate material particle size matching, and different three-dimensional space closest packing theoretical models are correspondingly selected according to material intrinsic attributes; therefore, on the basis of optimizing the stacking structure of the optimal filler of the heat-conducting polymer composite material, forming an efficient heat-conducting path and keeping the processing performance of the heat-conducting polymer composite material, the design and manufacturing processes are simplified, the production efficiency is improved, and powerful technical support is provided for effective heat dissipation and reliable and stable work of electronic equipment.

The invention discloses a tilting type electric vertical take-off and landing aircraft with foldable airfoils and an operation method. Comprising a fuselage, a fixed section wing arranged on the fuselage, a folding section wing connected to the fixed section wing through a wing folding assembly, a vertical fin arranged at the tail of the fuselage, a fixed section horizontal tail arranged on the vertical fin and a folding section horizontal tail connected to the fixed section horizontal tail through a horizontal tail folding assembly. The conversion of the aircraft among a folding mode, a helicopter mode and a fixed-wing aircraft mode can be realized under the action of the wing folding assembly and the horizontal tail folding assembly, a front-end rotor wing is arranged on the fixed-section wing, a middle-end rotor wing is arranged on the folding-section wing, and a rear-end rotor wing is arranged on the folding-section horizontal tail. When the aircraft is parked on the ground, the folding section wings and the folding section horizontal tail can be folded, so that the parking space needed by the aircraft is reduced, the requirement for special infrastructures is lowered, the cost is saved, the aircraft can be more easily integrated into the current limited space of a city, and the operation flexibility is enhanced.

The invention relates to a desert sand grading cleaning and sewage treatment system which comprises a frame base, a support and three grading cleaning tanks are installed at the top of the frame base, a material guiding inclined plate is installed at the top of each grading cleaning tank, a vibration screening machine frame is installed at the top of the support, and the vibration screening machine frame is designed to conduct vibration screening in the vertical direction. By designing the vibration screening machine frame, related assemblies of the vibration screening machine frame and the sand crushing assembly, during working, the three material guiding inclined plates can receive sand and stone particles of different sizes and grades, and finally the sand and stone particles are conveyed into the three grading cleaning tanks to complete grading cleaning; when the vibrating screening machine frame moves up and down, half teeth drive a rotating rod to rotate back and forth, so that a beating and crushing plate periodically beats the gravel, the caked gravel is beaten and crushed, and then the caked gravel enters three cleaning tanks to be cleaned after being beaten and crushed; the defect that in the prior art, grading and fragmenting operation cannot be completed in the cleaning process is effectively overcome.

The utility model belongs to the technical field of packaging mechanical equipment, and relates to a bag feeding mechanism which comprises a bag feeding swing arm, the upper portion of the bag feeding swing arm is rotationally connected with a rack, and the two ends of a mounting rod on the lower portion of the bag feeding swing arm are each provided with a clamping jaw assembly. The clamping jaw assembly comprises a clamping jaw mounting seat, a driving gear and a driven gear are rotationally arranged on the clamping jaw mounting seat, the driving gear is meshed with the driven gear, the driving gear drives the front bag clamping jaw to rotate synchronously, the driven gear drives the rear bag clamping jaw to rotate synchronously, and the front bag clamping jaw and the rear bag clamping jaw are matched with each other to clamp a bag; and the driving gear is driven by a driving component mounted on the clamping jaw mounting seat to operate. The bag feeding mechanism is reasonable and ingenious in structure, a bag can be reliably clamped through the front bag clamping claw and the rear bag clamping claw which are matched with each other, the front bag clamping claw and the rear bag clamping claw are matched with each other, and action is reliable and accurate; and the swing amplitude of the swing arm can be effectively reduced by matching with the bag feeding swing arm with a special structure.

The utility model relates to the field of switching devices, in particular to a switching unit of a switching device and the switching device, the switching unit comprises a movable contact part, a static contact part and an arc extinguishing assembly, the movable contact part is arranged on an action execution assembly, the arc extinguishing assembly is linked with the action execution assembly, and the arc extinguishing assembly is linked with the action execution assembly along with closing or breaking of the movable contact part and the static contact part. The arc isolating part of the arc extinguishing assembly is selectively positioned at the avoiding position or the arc extinguishing position, so that the arc isolating part forms physical isolation of the movable contact part and the static contact part at the arc extinguishing position to extinguish the arc; the arc extinguishing assembly and the action execution assembly form linkage through a tooth-shaped transmission mechanism. The switching device is provided with the switching unit. The arc extinguishing assembly and the action execution assembly are linked to enable the arc isolating part to move along with the movement of the action execution assembly, effective arc extinguishing can be realized, timely abdication can be realized to facilitate reliable closing of the movable contact part and the static contact part, the tooth-shaped transmission mechanism works reliably, the working reliability of the arc extinguishing assembly is improved, and the service life of the arc extinguishing assembly is prolonged. And the switch unit is ensured to have a good arc extinguishing effect.

The utility model relates to the technical field of diaphragm pumps, and discloses a thermal stress and thermal deformation self-adaptive fluid end base which comprises a horizontal base and a vertical support, the horizontal base is in a rectangular frame shape, a connecting hole is formed in the bottom end of the horizontal base, and the vertical support is connected to the upper end of the horizontal base and comprises a fixing plate, a supporting plate and a connecting plate. The fixing plate is connected to the horizontal base, the supporting plate is in an arch shape, the bottom of the supporting plate is provided with a supporting section connected with the fixing plate, and the top of the supporting plate is provided with a leading-in angle for fixing the connecting plate. The diaphragm pump fluid end base can solve the problem that an existing conventional diaphragm pump fluid end base cannot meet the requirements for thermal stress and thermal deformation under the high-temperature working condition.

The anti-slip device and tubing string are characterized by comprising an integrated U-shaped injection valve, an integrated U-shaped injection control valve, tubing, etc. Several integrated U-shaped injection valves spaced several meters apart are connected to the tubing string, and multiple integrated U-shaped injection control valves spaced several meters apart are connected to the tubing string, forming the anti-slip device and tubing string. Within the anti-slip device and tubing string, there are several U-shaped injection ports and multiple channels, as well as several upward-vertical-downward-vertical-upward U-shaped channels and gas-liquid mutually sealed end faces, forming a gas-driven liquid flow pattern. This prevents liquid backflow and slippage while retaining the rising gas. The channels of the integrated U-shaped injection control valve are used to introduce gas from outside the integrated U-shaped injection control valve into it to reduce the density of the fluid passing through it. This achieves the purpose of lifting, producing, and discharging deep-well liquids with lower gas pressure and volume, preventing liquid slippage and backflow, and improving the efficiency of gas lift liquid production and discharge.

The invention discloses a flexible transmission structure of a circular cooler. Comprising a flexible base, a driving component is arranged on the flexible base, and a transmission pin gear is arranged on an output shaft of the driving component. Self-adaptive adjustment of the driving component in the radial direction of the rotary body can be achieved, so that tight meshing of the transmission pin gear and the rotary body pin teeth is ensured. The device is high in impact load resistance, reliable in work, compact in structure and convenient to install and maintain.

The application relates to a full-mechanical automatic tracking self-balancing variable current voltage stabilizing device and a use method thereof, which comprises a main pipe and two gear connecting rod combined mechanisms arranged on the two sides of the main pipe respectively; the gear connecting rod combined mechanism comprises a bellows, a pressing plate pressed on one end of the bellows far from a water inlet pipe, and a pressing rod pressed on the hose; one end of the bellows is sealingly connected with the pipe wall of the water inlet pipe, the other end is sealingly fixedly connected with the pressing plate, a supporting rod extending away from the bellows is fixed on the pressing plate, a spring is connected with one end of the supporting rod far from the pressing plate, and the other end of the spring far from the supporting rod is fixedly arranged; the gear connecting rod combined mechanism further comprises a driving gear and a driven gear which are mutually meshed. The application changes the flow area of the hose through the gear transmission mechanism of each connecting rod and the expansion and contraction of the bellows when the water pressure changes, so that the flow is stored and the pressure is increased when the pressure is low, the municipal end water pressure is prevented from being lower than the minimum allowable value due to excessive secondary water supply and water taking, no external power is needed, and the automatic tracking and self-balancing functions are achieved.

The invention provides a surge eliminating circuit capable of being used for a satellite-borne refrigerator power supply input port. A carrier wave generating circuit generates a fixed-frequency periodic carrier wave; the modulating wave generating circuit generates output voltage which rises according to an exponential rule through charging and discharging and serves as a modulating wave. The comparison driving circuit compares the periodic carrier waves with the modulation waves rising according to the exponential law to generate a pulse sequence with the duty ratio gradually increased, the pulse sequence is applied to a grid electrode of the surge suppression MOS tube, and then the surge suppression MOS tube is controlled to slowly charge an L-C array at the rear stage of a satellite-borne refrigerator power supply. According to the invention, the surge current at the start-up moment can be suppressed, and the surge current impact of the L-C array on the bus at the start-up moment is reduced to the greatest extent.

The invention relates to the technical field of metal materials, and discloses a shape memory alloy film and a preparation method and application thereof. The shape memory alloy film comprises the following components: 50-55 at.% of Ni, 40-45 at.% of Ti, 3-5 at.% of Cu and 2-4 at.% of M, and M is selected from one or more of Zr, Hf and Nb. The shape memory alloy film has remarkable superelasticity, the recoverable strain of the shape memory alloy film can reach 8% or above, meanwhile, the compressive yield stress exceeds 1.5 GPa, and the shape memory alloy film shows excellent cycle stability. The preparation method is simple in process and high in controllability, a new scheme is provided for solving the problem of unstable performance of an existing NiTi-based film, and the preparation method is particularly suitable for high-performance micro devices such as a micro electro mechanical system.

The present application relates to the technical field of banana picking equipment, and discloses a radial self-adaptive device for banana mechanical carding, wherein a mounting plate with a through hole is connected to a supporting table through a lifting mechanism, a plurality of cutter radial adjustment devices are arranged on the mounting plate in the circumferential direction of the through hole, the cutter radial adjustment device comprises a support frame fixed to the mounting plate, a sliding table is fixed to the top of the support frame, the sliding table is provided with a sliding groove matched with a sliding block, the front end of the sliding block is fixed to a cutter, the rear end of the sliding block is hinged to a connecting rod, the other end of the connecting rod is hinged to a swing rod, the other end of the swing rod is hinged to the support frame, a pressing rod is fixed to the end of the swing rod away from the connecting rod, a shaft rod is arranged below the pressing rod, a cam set is slidably arranged on the shaft rod, an elastic part is arranged on the support frame and used for driving the end of the pressing rod to abut against the cam set, and a sliding positioning mechanism is arranged and used for driving the cam set to slide and position on the shaft rod. The device can realize radial self-adaptive adjustment of the cutter to banana stems with different diameters, and has the advantages of simple and quick adjustment, high practicability and high carding efficiency.

This application discloses an electrostatic chuck voltage filtering method, controller, and electrostatic chuck system. The method includes: acquiring voltage sampling data of the electrostatic chuck; determining the target operating condition type of the electrostatic chuck based on the voltage sampling data; adjusting a preset Kalman filter based on the target operating condition type to obtain an adjusted Kalman filter; and filtering the voltage sampling data based on the adjusted Kalman filter. This application can identify the target operating condition type of the electrostatic chuck and adaptively adjust the filtering parameters of the Kalman filter based on the target operating condition type, so that the driving voltage output by the Kalman filter quickly approaches or matches the actual driving voltage, thereby controlling the operation of the electrostatic chuck in a timely, fast, and high-precision manner, ensuring that the electrostatic chuck can operate reliably, stably, and with high precision.

The invention belongs to the technical field of electronic countermeasures, and particularly relates to a distributed jammer closed-loop coherent control method based on synthesis effect feedback, which comprises the following steps of: modeling signal coherent synthesis efficiency, acquiring coherent synthesis efficiency of a jammer A and a jammer B under different phase differences under an error-free condition, and calculating the coherent synthesis efficiency of the jammer A and the jammer B; establishing a phase difference-coherent combination efficiency mapping relation reference database; a-B jammer phase correction is carried out; and jammer A-C correction is carried out. According to the method, the robustness and the engineering practicability are remarkably improved; the cost, the power consumption and the complexity are effectively reduced; according to the invention, by taking a synthesis effect as a guide, the harsh requirement on the absolute space-time precision of a single node is relaxed, common commercial devices with lower cost and lower precision are allowed to be used for construction, and meanwhile, the complexity of initial calibration and setting is simplified, so that the hardware cost, power consumption and deployment and maintenance difficulty of the whole distributed mode are greatly reduced; and the dynamic self-correction and long-term stability capabilities are endowed.

The invention belongs to the technical field of hydraulic machinery, and particularly relates to a suspended pneumatic hydraulic cylinder which comprises a cylinder barrel assembly, a piston rod assembly, a guide sleeve assembly, a compression valve assembly and a stop valve assembly. In the cylinder barrel assembly, a cylinder barrel and a top cover are fixedly connected together; the spherical support is fixedly connected into the spherical curved surface on the left side of the top cover through the ball head pressing disc, and the valve rod is pressed into a round hole in the center of the right side of the top cover through the valve rod pressing disc. In the piston rod assembly, a piston, a piston rod and a shock absorber partition plate assembly are fixedly connected with a bottom cover, a ball head is supported and pressed in a spherical curved surface of the bottom cover through a ball head pressing disc, and a compression valve assembly and a stop valve assembly are correspondingly installed in shock absorber partition plate holes. And the guide sleeve assembly is screwed in the inner threaded hole of the cylinder barrel. After the piston rod assembly, the cylinder barrel assembly and the guide sleeve assembly are installed in a matched mode, linear reciprocating motion can be achieved under driving of external loads, and meanwhile variable damping adjustment can be achieved in the motion process. The device is reliable in structure integration, large in bearing capacity, reliable in transmission and convenient to repair and maintain.

The utility model belongs to the field of card swiping machine cases, and particularly relates to an outdoor card swiping machine case protection device, a hollow canopy is arranged above a card swiping machine case, hollow triangular inclined struts are arranged on the left side and the right side of the card swiping machine case, air curtain openings are formed in the lower sides of the canopy, the left inclined strut and the right inclined strut, a ventilation box is arranged on the rear side of a main machine case, and hollow cavities of the canopy, the left inclined strut and the right inclined strut are all communicated with the ventilation box. An air blower is arranged at the bottom of the ventilation box, a semiconductor cooler is arranged in the ventilation box, the cooling surface of the semiconductor cooler penetrates through the front side plate of the ventilation box and the rear side plate of the mainframe box to be tightly attached to the heating device of the main control board, and cooling fins are arranged on the rear side cooling surface of the semiconductor cooler and located over an air blowing opening of the air blower. According to the card swiping machine, the protective measures such as the ventilation box, the protective canopy and the airflow air curtain are additionally arranged on the card swiping machine case, the protective effects of rain prevention, sun protection and dust prevention are achieved, heating devices in the card swiping machine case are cooled through the semiconductor cooler, and high-temperature card clamping, crash and component burning can be avoided.

The utility model belongs to the technical field of transformers, and discloses a transformer oil storage assembly and a transformer, the transformer oil storage assembly comprises an oil tank and an oil storage mechanism, the oil tank is provided with an oil storage cavity, the oil tank is provided with a temperature detection piece, the temperature detection piece is used for detecting the temperature of oil in the oil storage cavity, and the oil storage mechanism comprises a first oil conservator and a second oil conservator. The first oil conservator and the second oil conservator are arranged on the oil tank, the first oil conservator is communicated with the oil storage cavity through a first oil conveying pipe, a switch valve is arranged on the first oil conveying pipe, and the second oil conservator is communicated with the oil storage cavity through a second oil conveying pipe. The transformer comprises the transformer oil storage assembly and further comprises a transformer body, and the oil tank is fixedly connected with the transformer body. According to the transformer oil storage assembly, compensation oil supply can be achieved for the oil tank of the transformer, and the temperature of oil in the oil tank is effectively prevented from being too high.

The invention relates to a device for disassembling a clutch, in particular to a device for disassembling a clutch, and aims to solve the problems that an existing clutch is embedded in a shell, the space is narrow, the clutch cannot be disassembled through a tool, the speed is low when the clutch is directly and manually disassembled manually, and the clutch can be damaged. The device comprises a flange, a claw disc, a driving screw rod, a screw rod sleeve and a plurality of claw rods, the screw sleeve is installed at the center of the flange, a plurality of through holes are machined in the flange in the radial direction, the driving screw is installed at the center of the claw disc in a threaded connection mode, one end of the driving screw abuts against the screw sleeve, the claw rods are installed on the claw disc in the radial direction, and the connecting end of each claw rod penetrates through the flange. The invention belongs to the field of disassembly of clutches.

The invention relates to the technical field of photoelectric sensors, and provides a photoelectric sensor which comprises a light emitting device and a light receiving device, the light emitting device is used for emitting light, and the light receiving device is opposite to the light emitting device and receives the light emitted by the light emitting device. Each of the light emitting device and the light receiving device comprises a shell, a light-transmitting piece and a connecting piece, an opening is formed in one side of the shell, the connecting pieces are arranged at the two ends of the light-transmitting piece in the first direction, and at least part of the peripheral side walls of the light-transmitting piece and the connecting pieces are attached to the shell, so that the opening of the shell is closed, and a sealed environment is formed in the shell; the sealing performance of the photoelectric sensor is improved, dust, water vapor, cuttings and the like outside the shell are prevented from entering the shell through the light-transmitting part and the opening of the shell, the environment of the shell is further ensured to be clean and dry, the photoelectric sensor works stably and reliably, and the connecting cost and the sealing cost of the photoelectric sensor are reduced through the arrangement of the connecting part.

This invention discloses a wellbore plugging device and its operating method. The device is used to plug the casing of oil and gas wellheads under high-pressure or ultra-high-pressure testing conditions. It includes a central tube with an upper end and a lower end connected to its upper and lower ends, respectively. From the upper end to the lower end, a first conversion assembly, a sealing assembly with at least one sealing rubber sleeve, an anchoring assembly, and a second conversion assembly are sequentially fitted onto the central tube between the upper and lower ends. The first and second conversion assemblies are threadedly connected to the central tube. When the central tube is rotated clockwise or counterclockwise, the first and second conversion assemblies move towards or away from each other along the axis of the central tube. A volumetric tube is provided between the sealing assembly and the central tube, and is fixedly connected to the central tube. The upper end of the volumetric tube and the lower part of the first conversion assembly cooperate to form a bypass structure. The wellbore plugging device of this invention is reliable in operation and can withstand high-pressure sealing.