124results about How to "Guaranteed operational reliability" patented technology

The invention discloses a fuel cell system and a control method thereof. The fuel cell system is applied to a vehicle and comprises a hydrogen supply component, an air supply component, an electric pile, a water segregator and a heat management component. The hydrogen supply component comprises a hydrogen storage mechanism, a pressure reducing valve, a plate heat exchanger, a proportioning valve and an ejector; the air supply component comprises an air filter, an air compressor, an intercooler and an inlet butterfly valve; the plate heat exchanger and the intercooler are arranged in an attached mode, an air flow channel of the intercooler is connected with the air compressor and the inlet butterfly valve, and a cooling liquid flow channel of the intercooler is connected with a low-temperature heat dissipation loop of the vehicle. The electric pile is connected with the ejector, the inlet butterfly valve and the outlet butterfly valve; the water segregator is respectively connected with the electric pile, the ejector, the nitrogen discharge valve and the water discharge valve; the heat management component is connected with a cooling liquid inlet and a cooling liquid outlet of the electric pile respectively, and the heat management component is used for forming a high-temperature heat dissipation loop of the vehicle. According to the embodiment of the invention, the operation reliability of the fuel cell system in a low-temperature environment can be improved.

The invention discloses a rapid fault isolation method and device for a power network powered by a power electronic power supply, and the method comprises the steps: respectively obtaining the grid-connected point voltage values of a plurality of pieces of power electronic power supply equipment at the same preset time when the grid-connected point voltage is abnormal, and sorting the grid-connected point voltage values from small to large; based on the topological structure of the power network, determining the bus corresponding to the minimum voltage value of the grid-connected point as the first bus closest to the fault point of the power network in combination with the sorting result; and locking a power electronic power supply equipment trigger pulse corresponding to the first bus, determining an opposite-end bus connected with the first bus as a second bus according to the grid-connected point voltage value variation before and after locking, and isolating a fault line between the first bus and the second bus. By adopting a multi-point voltage amplitude sorting comparison criterion, the requirements on data synchronization and data precision are relatively low; rapid isolation of internal faults of a renewable energy local power grid or a regional energy autonomous power grid is realized, and a guarantee is provided for continuous power supply of a non-fault region.

The invention relates to a two-stage three-level high-voltage battery charging and discharging device and a control method. The two-stage three-level high-voltage battery charging and discharging device comprises an ACDC circuit connected with a power grid and used for converting alternating current into direct current; the DCDC circuit comprises a first capacitor, a second capacitor, a third capacitor and a first flying capacitor control circuit; the anode of the first capacitor is connected to the first flying capacitor control circuit through a first connection point, and the cathode of the first capacitor is connected with the anode of the second capacitor; the negative electrode of the second capacitor is connected to the first flying capacitor control circuit through a third connection point; the positive electrode of the third capacitor is connected to the first flying capacitor control circuit through a fourth connection point, and the negative electrode of the third capacitor is connected to the first flying capacitor control circuit through a fifth connection point; the first flying capacitor control circuit is connected to the ACDC circuit through a second connection point; and the LC filter circuit is connected with the DCDC circuit. The system stability and reliability are enhanced, and the test requirements of the high-voltage battery are met.

The invention belongs to the technical field of lunar exploration space, and particularly relates to a manned lunar rover driving operation platform. The platform comprises a central processing module, a main display screen, an operation panel, a foldable force feedback control module, an auxiliary control panel, a sensing module and a voice control module. A comfortable and intelligent driving operation space is created for a lunar rover driver, intelligent perception and panoramic display of the surrounding lunar surface environment are provided, the driving experience is optimized, and the reliability and safety of driving operation are guaranteed.

The invention discloses an online cable sheath circulating current monitoring system and method, and relates to the technical field of cable sheath circulating current monitoring, and the method comprises the following steps: installing a high-precision sensor outside a cable sheath for continuously monitoring a current signal of sheath circulating current, and carrying out the noise reduction and cleaning of collected data; key features reflecting abnormal tiny circulating current accumulation are extracted from the preprocessed current signals, the extracted features are further processed in a set monitoring window, and the processed features serve as an input feature set. Through a high-precision sensor, a deep convolutional neural network and a clustering algorithm, tiny circulation anomalies in a cable sheath are accurately identified and classified, the tiny circulation anomalies are subdivided into an accumulation appearance type, a distributed appearance type and an accidental appearance type, an alarm is given in time when risk accumulation occurs, false alarms are reduced, the monitoring efficiency and the safety of the cable sheath are improved, and the safety of the cable sheath is improved. Faults caused by heat accumulation are prevented, and stable operation and power supply reliability of a cable system are ensured.

The invention discloses an intelligent opening and closing method and system for a reclosing circuit breaker based on an electromagnet, and relates to the field of intelligent control, and the method comprises the steps: monitoring a line current in real time, comparing the line current with a preset threshold value, and carrying out the opening after the overcurrent abnormality is detected. Entering a first time delay stage after opening, comprehensively evaluating the states of the circuit breaker and the circuit, and constructing a dynamic weight index system to calculate an evaluation score; if the score exceeds a threshold value, closing is carried out after time delay is finished, otherwise, an alarm is triggered. And entering a second delay stage after switching on, continuously monitoring the electric parameters and establishing an anomaly judgment mechanism, forming a closed-loop protection process of monitoring, switching off, evaluating, switching on and re-monitoring, and realizing intelligent linkage of overcurrent protection and state self-adaption. The method has the advantages that through real-time line electric parameter monitoring, multi-dimensional state evaluation and an intelligent decision-making mechanism, precise opening and closing of the circuit breaker are achieved, the power supply reliability is improved, the power failure time is shortened, and the misoperation risk is reduced.

The utility model discloses bus strength stress test equipment, which comprises a detection support, a fixed processing structure and a stretching and bending structure, the fixed processing structure and the stretching and bending structure are mounted on the detection support, and relates to the technical field of bus testing, in particular to a self-adaptive clamping system. An electromagnetically driven arc extrusion block is adopted to be matched with a liftable convex block, stepless pressure adjustment is realized through magnetic force conduction, and a horizontal telescopic spring buffer mechanism is combined, so that a bus can be tightly fixed, machining impact can be absorbed, and clamping stability is ensured; multi-dimensional deformation control is achieved, a cross-shaped extrusion support is carried on a rotary extrusion circular ring pipe, 360-degree dynamic extrusion can be conducted on a bus in cooperation with four sets of concave wheels driven by electromagnetic repulsion, and precise closed-loop control over the stretching strength is achieved in cooperation with real-time monitoring of a pressure sensor.

The present invention relates to an integrated buoyancy and attitude adjustment system for a manned submersible, comprising a manned submersible, a ballast tank unit, a main pumping assembly, an external circulation switch valve and a first switch valve, wherein one end of the external circulation switch valve is connected to the ballast tank unit in a one-to-one correspondence, and the other end is connected to the main pumping assembly, the other end of the main pumping assembly is connected to the first switch valve, and the other end of the first switch valve is communicated with an open sea environment; an internal circulation switch valve, wherein one end of the internal circulation switch valve is connected to the ballast tank unit in a one-to-one correspondence, and the other end is connected to a pipeline between the main pumping assembly and the first switch valve; the external circulation switch valve cooperates with the main pumping assembly and the first switch valve to inject or discharge seawater into or out of the ballast tank unit; the internal circulation switch valve cooperates with the main pumping assembly, the first switch valve and the external circulation switch valve to complete water injection and drainage between each ballast tank unit; the present invention overcomes the problems of complex design, high cost, high energy consumption, short endurance and low reliability of the buoyancy and attitude adjustment system.

The invention discloses a belt conveyor which comprises a conveying belt, a conveying belt bearing mechanism, a conveying belt driving mechanism and a conveying belt tensioning mechanism, and the conveying belt bearing mechanism at least comprises a carrier roller bearing section and a carrier vehicle bearing section; the trailer bearing section comprises a trailer, a bearing rail and a swing mechanism, and the discharging end and the discharging end of the belt conveyor are arranged on the carrier roller bearing section. According to the belt conveyor, the carrier roller bearing section and the carrier vehicle bearing section are arranged, connection between the two bearing sections is optimized, the overall energy consumption of the conveyor can be reduced, meanwhile, the running reliability of the conveying belt is guaranteed, and damage to the conveying belt is reduced.

The utility model relates to the field of starters, in particular to a planetary speed reduction type automobile starter which comprises a base, a direct current motor is arranged on the base, a rotor and a stator part are arranged on the direct current motor, the stator part comprises a stator body and magnetic shoe parts, and the magnetic shoe parts are evenly arranged on the inner wall of the stator body at intervals in the circumferential direction. A positioning plate is installed in a gap between the magnetic tile pieces, a positioning groove is formed in the bottom of the positioning plate, a positioning protruding block matched with the positioning groove is arranged on the inner wall of the stator body, and the positioning groove is arranged on the positioning protruding block in a clamping mode. According to the structure, the magnetic tile pieces can be reliably installed on the inner wall of the stator body through the positioning plates, and when the magnetic tile pieces are installed, the magnetic tile pieces can slide into the clamping grooves between the positioning plates by compressing the side walls of the positioning plates, so that the installation is more convenient and faster, and the installation efficiency of the magnetic tile pieces is effectively improved; therefore, the technical effects of reliable positioning and convenient installation of the magnetic shoe piece are realized, and the operation reliability of the rotor is ensured.

The utility model belongs to the technical field of motor detection, and particularly relates to a thermal protection detection system for a motor stator assembly. In order to overcome the defect that the thermal protection of a motor stator is not detected in the existing motor production process, the utility model adopts the following technical scheme: the thermal protection detection system for the motor stator assembly comprises a detection platform; a coil winding joint; a thermistor joint; a thermal protector joint; a DC power source; a voltage and current module; the main control board is used for switching on a direct-current power supply, switching off the direct-current power supply according to the state of the thermal protector, receiving voltage and current signals before and after the coil winding is electrified, calculating the temperature rise of the coil winding and receiving a thermistor temperature signal; and finally, comparing the received temperature of the thermistor with the temperature after the temperature rise of the coil winding and the allowable temperature range of the thermal protector. The beneficial effects of the utility model are that the detection of the thermistor and the thermal protector of the motor stator assembly to be detected is realized, and the operation reliability of the motor after the motor is offline is finally ensured.

The utility model provides a kind of integrated spray channel and air duct's shelf and cleaning device, wherein spray channel includes shelf body, and spray part is equipped on shelf body, and spray part contains the protruding edge of the spray pipeline shell and shelf body bottom integrated molding, and spray pipeline shell is located below shelf body, and its top edge is coincident with protruding edge and is connected with shelf body bottom;Shelf body and spray pipeline shell are connected to form spray cavity, and multiple groups of spray nozzles are equipped on shelf body, and spray nozzle is through with spray cavity, and multiple groups of spray nozzles form spray channel by spray cavity.The design is through the cooperation of shelf body and spray pipeline shell to build spray channel, utilize protruding edge to improve the sealing property of spray cavity, realize water flow uniform spray by multiple groups of spray nozzles, can reduce the space occupation of spray channel, lay foundation for subsequent integrated air duct, solve the problem that traditional cleaning device shelf spray channel independent layout occupies space, influence cleaning effect.

The embodiment of the invention provides a ship control method, device and equipment and a medium, and relates to the technical field of control, the method is applied to the ship control equipment, and the method comprises the steps that in the ship navigation process, the obstacle height of a height-limited object to be passed within a set distance range is detected, and under the condition that the passing height of a ship is larger than the obstacle height, the ship is controlled to pass through the height-limited object; and determining the target water level of the ballast water tank cabin required by the ship to pass through the height limiting object. And controlling the ballast water system to supplement water to the ballast water tank, so that the water level of the ballast water tank reaches the target water level, and the passing height re-determined based on the target water level is smaller than the obstacle height, thereby ensuring the operation reliability of the ship.

The application provides a linear motion test system of a multi-channel inductive proximity sensor, relates to the technical field of aviation sensor testing, and comprises a base, a plurality of linear motion platforms installed on the base, a plurality of targets fixed on the linear motion platforms through target supports, a plurality of proximity sensors fixed on the base through sensor supports, a plurality of stepping motors for driving the linear motion platforms to move along a straight line, and an upper computer connected with the stepping motors through a CAN bus via a CAN distributor, for sending position control instructions to the stepping motors, so that the stepping motors drive the linear motion platforms to drive the targets to move, the distance between the targets and the proximity sensors is adjusted, the inductance values of the plurality of proximity sensors are collected by a measured controller, and performance verification is completed. The application realizes automatic and accurate control, reproduces real working conditions, improves the reliability of test data, adapts to the testing requirements of multiple scenes, and guarantees the operation reliability of aviation key systems.

The present application relates to the technical field of energy storage, in particular to a circuit board heat dissipation assembly, a preparation method thereof, and an energy storage system, the circuit board heat dissipation assembly comprising a circuit board, a frame, a heat-conducting glue, and a functional component; the circuit board has a heat dissipation area and a connecting area, and the connecting area is arranged around the heat dissipation area; the frame is formed with a heat dissipation cavity; the functional component covers a first open end of the heat dissipation cavity, the circuit board is arranged in the frame through the connecting area to cover a second open end of the heat dissipation cavity, and the heat dissipation area is communicated with the heat dissipation cavity; the heat dissipation area is provided with a glue pouring hole and a glue overflow hole communicated with the heat dissipation cavity; the heat-conducting glue is configured to be injected into the heat dissipation cavity through the glue pouring hole when in a liquid state and solidified, and the heat-conducting glue is fixed to the heat dissipation area and the functional component, respectively. Through the arrangement of the frame and the heat-conducting glue, a heat conduction path is formed between the circuit board and the functional component, heat generated by the circuit board or the functional component can be efficiently conducted and dissipated through the heat-conducting glue, and the operation reliability of the circuit board and the functional component is ensured.

The application relates to a double-tank structure and an automatic detection device, the double-tank structure comprising a double tank, a variable-diameter column pin and a liquid inlet joint, the double tank comprising a first tank and a second tank arranged side by side, the first tank and the second tank being communicated through an overflow groove; a plunger hole is formed in the double tank, a part of the plunger hole is located at the position of the overflow groove and extends along the depth direction of the overflow groove to penetrate the double tank; a through hole communicated with the plunger hole is formed in the tank wall of the first tank; the variable-diameter column pin is slidably inserted into the plunger hole and can be sealed with the hole wall of the plunger hole; a ring groove is formed in the variable-diameter column pin; the liquid inlet joint is fixedly inserted into the plunger hole and located below the variable-diameter column pin; wherein the variable-diameter column pin can slide relative to the double tank under the push of the medium injected by the liquid inlet joint, so that the liquid inlet joint, the first tank, the ring groove and the second tank are sequentially communicated.

The invention discloses aluminum plate strip processing surface washing decontamination equipment, and belongs to the technical field of aluminum plate strip processing, the aluminum plate strip processing surface washing decontamination equipment comprises a washing tank, two ends of the washing tank are provided with openings for an aluminum plate strip to penetrate in and out, a partition plate is fixedly arranged in the washing tank, and the interior of the washing tank is divided into a scrubbing bin and a rinsing bin by the partition plate; a plurality of first guide rollers are rotationally connected into the scrubbing bin and the rinsing bin, a drying assembly for drying the aluminum plate strip is arranged at an opening in one end of the washing tank, and a filtering assembly for treating sewage is arranged on the rear side of the washing tank. Floating dust and impurities are stripped through high-pressure spraying of the spray head, stubborn stains are removed through mechanical brushing of the brush, deep purification is conducted through the rinsing bin, continuous operation is conducted in the whole process, the surface cleanliness and cleaning uniformity of the aluminum plate strip are greatly improved, and the high-precision surface treatment requirement is met.

The present invention relates to a shaft sealing structure of an air compressor, in particular to an air compressor and a double oil seal sealing structure of an output shaft end thereof, comprising a rotating shaft, a shaft seat, an oil seal sleeve, a first oil seal, a second oil seal and an oil seal seat; the rotating shaft is rotatably arranged on the shaft seat, the oil seal seat is fixedly arranged on the outer side of the shaft seat, and the output end of the rotating shaft extends outward through the shaft seat and the oil seal seat; an oil seal sleeve is coated on the output end of the rotating shaft, and the first oil seal and the second oil seal are coated on the oil seal sleeve from the inside to the outside; the first oil seal and the second oil seal are arranged in the oil seal seat; an annular first cavity is formed between the oil seal sleeve, the first oil seal, the second oil seal and the oil seal seat; a second cavity is formed between the inner side of the oil seal seat and the shaft seat, an oil inlet hole is arranged on the inner side of the oil seal seat, and the oil inlet hole is connected to the first cavity and the second cavity; an oil outlet hole is arranged at the bottom of the first cavity. This patent effectively reduces the pressure acting on the oil seal and prolongs the service life of the oil seal.

The invention relates to the technical field of intelligent air conditioners, and discloses a method and device for controlling an outdoor unit of an air conditioner, the air conditioner and a storage medium. The method comprises the steps that under the condition that it is determined that the air conditioner meets the current operation condition, the current outdoor humidity is obtained; under the condition that the current outdoor temperature is larger than the set humidity value, a current air speed reduction strategy matched with the current outdoor unit operation mode in the current operation condition is determined; and according to the current air speed reducing strategy, controlling the air conditioner outdoor fan to run at reduced speed. Therefore, different reduction strategies are adopted for the outdoor humidity and the outdoor fan, the operation reliability of the air conditioner is guaranteed, the use comfort of a user is met, meanwhile, the performance of the air conditioner is improved, and better energy efficiency is achieved.

The embodiment of the application provides an engine cylinder cover, an engine and a vehicle, the engine cylinder cover comprising: a cylinder cover body, an oil pump support and a cylinder cover cover; the oil pump support is arranged on one side surface of the cylinder cover body; the cylinder cover cover is installed on the top of the oil pump support and the cylinder cover body; the oil pump support and the cylinder cover cover jointly seal the cylinder cover body; a sealing element is arranged between the cylinder cover cover and the cylinder cover body; and / or, arranged between the oil pump support and the cylinder cover body; and / or, arranged between the oil pump support and the cylinder cover cover. Based on the modular design, the oil pump support and the cylinder cover cover jointly seal the cylinder cover body, and a sealing element can be arranged between the three to ensure the sealing performance; and when performing maintenance, the oil pump support and the cylinder cover cover can be replaced separately, so that the whole is not replaced, and the maintenance cost is reduced.

This invention discloses an elevator operation monitoring method and system. The ingenious solution monitors the operating parameters and components of the elevator during operation. When an anomaly occurs, an anomaly operation record is generated to record the operating instructions and parameters at the time of the anomaly. When the elevator is idle, the anomaly operation record is used as a reference for elevator self-checking. By reconstructing the operating condition at the time of the anomaly, monitoring is performed again and relevant monitoring data is obtained, thereby achieving the best possible reproduction of the anomaly. This provides a reference for subsequent elevator maintenance or operational intervention. For some sporadic anomalies, if they can be reproduced multiple times under specific parameters, they have a significant impact on the safe operation of the elevator and can provide a reliable reference for whether to suspend elevator use. For anomalies or jams with less impact on safety, they can provide better maintenance references for maintenance personnel, enabling targeted and focused maintenance.

The present invention discloses a compressor and its motor and rotor balancing block, wherein the rotor balancing block comprises: a base plate, the base plate is an annular structure; a boss, the boss is mounted on the outer annular surface of the annular structure; a fluid passage, the fluid passage passes through the annular wall of the annular structure, and / or the fluid passage passes through the boss; the extension direction of the fluid passage is the same as the rotor rotation direction of the motor. The rotor balancing block provided by the present invention is provided with a fluid passage on the base plate and / or the step, the fluid passage is the same as the rotor rotation direction, that is, the path of the fluid passage is similar to a centrifugal line, when the cooling oil flows in the motor, the design of the fluid passage can significantly speed up the cooling oil flow speed, thereby greatly improving the cooling oil reflux speed, maintaining sufficient oil in the oil pool, and thus ensuring the compressor lubrication effect and operation reliability.

The utility model is applicable to the field of wine storage equipment, and discloses a wine cabinet with a ventilating slot seat on a side wall, which comprises a shell, an air inlet is arranged on the lower portion of the side wall of the shell, the ventilating slot seat is arranged at the air inlet, and a fan and a micro-channel condenser are arranged on one side of the bottom of the shell close to the air inlet. Wherein a fixing plate is further arranged in the shell, one side of the ventilation slot seat is fixedly connected with the fixing plate, the other side of the ventilation slot seat is fixedly connected with the side wall of the shell, and a plurality of air inlet holes are formed in the side, close to the air inlet, of the ventilation slot seat. The ventilation slot base is located on the lower portion of the side wall of the wine cabinet, a condenser product is provided with a micro-channel and a side face air inlet direct blowing micro-channel, and the heat dissipation efficiency is higher compared with the bottom and back hanging. The ventilation slot base is fixedly connected with the fixing plate and the side wall of the wine cabinet, the overall structural stability of the wine cabinet is enhanced, it is guaranteed that the ventilation slot base is not prone to deformation or displacement due to the influence of external force in the using process, and the long-term air inlet effect and operation reliability of the wine cabinet can be kept.

The invention discloses a large-diameter high-temperature steam pipeline heat insulation support, belongs to the technical field of pipeline supports, and aims to solve the problems that the heat insulation function of the support loses efficacy due to the fact that a hard heat insulation block is prone to cracking, breaking and even falling off after being used for a long time, and meanwhile the stress bearing position of a heat insulation material is fixed. The steam pipeline comprises a steam pipeline body, a heat preservation assembly is arranged on the outer wall of the steam pipeline body, a plurality of concrete bases are arranged on one side of the steam pipeline body, rolling assemblies are arranged at the tops of the concrete bases, and two supporting frames are arranged at the tops of the rolling assemblies in parallel; the efficient heat insulation nanometer aerogel heat preservation sleeve is conveniently and stably fixed outside the steam pipeline, heat of the pipeline is effectively prevented from being conducted and dissipated through a support, the problems that a traditional hard heat insulation block is prone to damage, and the heat insulation function is prone to losing efficacy are solved, and the energy-saving effect and the energy efficiency stability of long-distance steam conveying are guaranteed.

The utility model discloses a high accuracy detection equipment with feeding mechanism, including base and detection seat, the top of base is fixed with detection seat, one side of detection seat is provided with the stand, the middle part welding of stand has a plurality of layers of partition board, the top of partition board places the raw board. This high accuracy detection equipment with feeding mechanism drives first screw rod to rotate through first motor, drives first sliding block to move along first sliding slot transversely, realizes the positioning of feeding mechanism in horizontal direction, drives second sliding block to move along second sliding slot vertically through the rotation of second screw rod driven by second motor, realizes accurate material taking and material discharging of feeding plate in vertical direction in combination with the telescopic action of electric telescopic link, can take out raw board from the partition board of stand automatically, and accurate conveying to detection seat carries out high accuracy detection, significantly improves detection efficiency and automation level, reduces manual intervention error.

The utility model relates to food processing equipment manufacturing technical field especially a gluten roll winding device and including its gluten roll winding machine. Gluten roll winding device includes winding main body, material return cylinder, first drive part and second drive part. Winding main body rotates and produces winding force under the action of first drive part, and material return cylinder is driven axial displacement by second drive part to return material. The winding main body's bearing bearing gluten body, and the material return cylinder cooperates extruding gluten body when returning material, makes its axial folding compact, and simultaneously, the material blocking piece is pushed and is bent in the opposite direction, so that gluten body falls off smoothly. In this way, the problem of traditional gluten roll winding device returning material loose, finished product consistency is poor is solved, and through the cooperation of elastic material blocking piece and material return cylinder, the tightness of gluten roll and the material return efficiency are improved.

This application relates to the field of motor structure technology, and more particularly to a brake motor structure, comprising: a housing, the housing including an inner shell and an outer shell, wherein a plurality of connecting members are evenly distributed circumferentially on the inner wall of the outer shell, the inner shell is integrally connected to the outer shell through the connecting members, one end face of the outer shell is higher than the end face of the inner shell, and a concave mounting cavity is formed between the two end faces; a rear end cover, installed in the mounting cavity and fixedly connected to the end face of the inner shell, wherein a braking cavity is formed inside the rear end cover, and a braking component is provided in the braking cavity, the mounting axis of the braking component being collinear with the axis of the housing. Compared with the prior art, this application eliminates the inherent weakness of multi-part splicing in split design through integrated housing design, while also reducing the number of additional parts and process steps, thereby enhancing the overall structural stability, ensuring operational reliability, and significantly reducing the overall manufacturing cost.

The utility model belongs to the technical field of heating, specifically discloses a kind of solenoid valve, gas distribution device and gas hot water equipment.Electromagnetic valve includes electromagnetic mechanism, multiple valve core and multiple elastic parts, the inside of electromagnetic mechanism has at least two and interval arrangement installation shaft hole, the first end of installation shaft hole is closed and second end open setting, the coil group of electromagnetic mechanism is encircled in the outside of all installation shaft hole;Valve core's first end is coaxial and is slidably inserted in corresponding installation shaft hole, the second end of valve core is stretched out the outside of installation shaft hole and has sealing cap;Elastic part applies elastic force to corresponding valve core away from electromagnetic mechanism, the elastic modulus of all elastic parts is different, when the electromagnetic mechanism stops working, the elastic part is used to reset corresponding valve core.The utility model can realize the on-off control of one solenoid valve to multiple channels, reduce the cost of solenoid valve and gas distribution device, improve use experience.

A double seal ring connector comprises: a first elastic seal ring; a second elastic seal ring partially embedded in the first elastic seal ring; characterized in that the double seal ring connector comprises a receiving part and an insertion part; the shape of the insertion part corresponds to the receiving part and is fitted into the receiving part; the insertion part comprises a joint, a connecting rod and a locking boss; the connecting rod extends in a radial direction, an axial direction or a circumferential direction; the joint is arranged at the end of the connecting rod and is mirror symmetric along its symmetry axis; the locking boss is arranged on both sides of the connecting rod and is spaced a distance from the connecting rod; the locking boss extends in the same direction as the connecting rod, and the length of the locking boss in the extension direction is less than 2 / 3 of the sum of the lengths of the joint and the connecting rod in the extension direction of the connecting rod.

An outdoor self-cleaning power distribution cabinet includes a cabinet body, an air guide assembly, and a dust filter box. The dust filter box includes a box body and multiple piston cylinders installed inside the box body. Each piston cylinder has an air inlet at its bottom, and an exhaust window is provided between any two adjacent piston cylinders. The lower end of each piston cylinder has a mesh screen for airflow. Inside the piston cylinder is a piston that slides back and forth on the inner wall of the mesh screen. As the piston slides, it scrapes away dust adhering to the surface of the mesh screen. The dust filter box with a piston structure at the air inlet ensures that the piston head completes a reciprocating scraping motion within the mesh screen each time the fan starts and stops, automatically removing dust accumulated on the outer surface of the mesh. This process requires no manual intervention, maintaining a clean state and ensuring the normal operating life and reliability of the electrical equipment.