4684 results about "High pressure gas" patented technology

The present invention relates to the technical field of waste heat recovery equipment, and specifically discloses a waste heat recovery device for flue gas in a thermal power plant. It includes a box body with an upper smoke chamber, a heat exchange chamber and a lower smoke chamber inside. A number of smoke pipes connecting the upper smoke chamber and the lower smoke chamber are fixed in the heat exchange chamber; above the smoke pipes, there is a piston cylinder fixed by the box body; the upper end of the piston cylinder is connected to a high-pressure gas supply pipe, and a piston is arranged inside. The piston is connected with a scraping head through a push rod; side holes are provided on the push rod; when the high-pressure gas drives the piston to move downward, the scraping head moves along the inner wall of the smoke pipe to scrape off the ash slag. The waste heat recovery device for flue gas in this thermal power plant has a cleaning function and a better cleaning effect, high heat exchange efficiency and good waste heat recovery effect. The waste heat recovery device for flue gas in this thermal power plant can be automatically cleaned without disassembling components, is fast and efficient, and can be operated online. The ash slag scraped off during the cleaning process can be centrally recovered, avoiding re-mixing into the flue gas again, reducing the workload in the flue gas dust treatment link, and saving the subsequent environmental protection treatment cost.

The invention relates to the technical field of wharf loading and unloading, and discloses a bulk grain wharf ship loading and unloading dual-purpose machine which comprises a conveyor main body and a frame, a discharging hopper is fixedly connected to the top of the conveyor main body, the bottom of the conveyor main body is rotationally connected with the outer wall of the frame, and a supporting frame is rotationally connected to the bottom of the conveyor main body; when a ship needs to be unloaded, a conveying pipeline enters a cabin through a moving assembly, then when a first motor is started to enable a rotating rod to rotate, a connecting rod can be driven to rotate, a concave-convex ring rotates, an extrusion pushing assembly ascends and extrudes gas, and finally high-pressure gas is sprayed out towards grain particles and permeates into gaps of the grain particles to form an air cushion effect; the friction force among grain particles is reduced, the mobility of the grain particles is enhanced, the grains are conveniently conveyed by the spiral auger, the situation that the grains are accumulated at the bottom of the spiral auger due to poor mobility of the grain particles, the grains are extruded and are prone to being damaged is effectively prevented, and the integrity of the grain particles is ensured.

The invention provides an excitation fuse with active and passive integrated protection and a related device. The excitation fuse is applied to a protected circuit. The active and passive integrated protection excitation fuse comprises a fuse shell, an impact device, a first melt, a second melt, a first conductor, a second conductor and at least one excitation source, the excitation fuse is connected in series in a protected circuit through the first conductor and the second conductor; the first melt and the second melt are connected in parallel between the first conductor and the second conductor; when the voltage of the first melt is higher than the trigger voltage of any excitation source in the at least one excitation source, the corresponding excitation source is triggered to release high-pressure gas into the penetrating cavity; or any excitation source in the at least one excitation source releases the high-pressure gas into the penetrating cavity when receiving the control signal of the control circuit; and then the impact device is pushed to impact the first melt and / or the second melt along the movable cavity so as to cut off the first melt and / or the second melt.

The invention relates to the technical field of machine shell casting, and discloses a combined pump body machine shell casting mold and a using method thereof.The combined pump body machine shell casting mold comprises a base, a telescopic rod is fixedly connected to the top of the base, and a mounting plate is fixedly connected to the end, away from the base, of the telescopic rod; when the first piston block moves upwards, the first piston block drives the second piston block to move upwards along the inner wall of the hydraulic cylinder through the fixing rod, so that a solution in the hydraulic cylinder enters the first hydraulic telescopic rod, and the first hydraulic telescopic rod extends outwards; a first hydraulic telescopic rod drives a cross-shaped blocking plate to slide downwards along the inner wall of a second fixing plate through a pulling frame, high-pressure gas in an exhaust groove can be sprayed out through a gap between the cross-shaped blocking plate and the second fixing plate, the high-pressure gas acts on the bottom of a shell, and gas demolding is replaced with the high-pressure gas; and the pressure on the outer wall during demolding of the shell is effectively reduced.

The invention belongs to the technical field of capacitor protection, and particularly discloses an ultralow-temperature ox horn capacitor which comprises an aluminum capacitor shell, a base plate is fixed between the inner walls of the aluminum capacitor shell, a sealing plate is fixed to the position, close to the bottom edge, between the inner walls of the aluminum capacitor shell, and a bent pull-up edge is arranged on the outer surface of the aluminum capacitor shell. The bent pull-up edge is located between the base plate and the sealing plate, and a neutralizing device is arranged between the bottom of the base plate and the top of the sealing plate; according to the aluminum capacitor shell, the explosion-proof cavity and the bent pull-up edge are arranged in the aluminum capacitor shell, so that the volume of the explosion-proof cavity is increased by straightening the bent pull-up edge under the action of high-pressure gas when the high-pressure gas is generated in the aluminum capacitor shell, the high-pressure gas is buffered, and a circuit is cut off at the same time; and the driving assembly is triggered to position the capacitor, and meanwhile, the neutralizing device is triggered to neutralize the generated corrosive gas and then discharge the corrosive gas.

The invention relates to the technical field of valve machining, and discloses an auxiliary machining device for valve blank forging and a using method thereof.The auxiliary machining device comprises a forging table, a motor is fixedly connected to the side wall of the forging table, a swing rotating rod is rotatably connected to the inner wall of the forging table, and a forging block is slidably connected to the inner wall of the forging table; a servo motor is started to drive a gear rod to rotate, a gear ring is made to rotate, a fixing frame is made to rotate, balls on the top of a spring pressing plate are made to make contact with the inclined face of an inclined face ring, the spring pressing plate descends to extrude gas in the fixing frame, and the gas rises under extrusion pressure till high-pressure gas can push a piston push rod to move and drive a spring clamping block to move; the blank is located in the center of the forging table through cooperative pushing of the three spring clamping blocks, the blank is driven to rotate through application of the assemblies, the clamping force on the blank can be reduced when the blank is forged, and the situation that the size of the blank is affected due to the fact that the clamping force on the blank is too large is effectively prevented.

The invention relates to the technical field of chemical reaction kettles, and relates to a chemical reaction kettle for preventing material adhesion, the chemical reaction kettle comprises a reaction kettle body, a power assembly, an adjusting assembly and a matching assembly, in the power assembly, a motor drives an outer cylinder to rotate and stir and drives an inflation assembly at the same time, so that a one-way nozzle sprays air into the reaction kettle; the adjusting assembly can automatically adjust the angle of the stirring blade according to the air pressure, adapt to the viscosity change of the solution in the stirring process and improve the stirring effect, and the matching assembly can introduce the high-pressure gas in the reaction kettle into the material box when the air pressure is increased; the high-pressure gas quickly disperses and sprays out the powder, so that the mixing time is shortened, the agglomeration probability is reduced, and the material mixing uniformity and the reaction efficiency are remarkably improved.

The invention discloses a multi-head gas analysis device, and relates to the technical field of infrared gas analyzers, the multi-head gas analysis device comprises a sampling joint body, and the sampling joint body comprises a sampling tube, a threaded port, a double-head connecting tube, an upper steel ball and an upper spring. In the using process, through the structural arrangement that the multiple sets of sampling connector bodies are arranged on the side end edge of the infrared gas analyzer side by side, the sampling requirements of the multiple sets of sampling tank bodies can be met, and the number of to-be-detected samples and the detection efficiency are effectively improved; the establishment of a gas passage from the sampling tank body to the sampling pipe is controlled through gas pressure, so that the to-be-detected gas samples in the sampling tank body at multiple positions can be sequentially detected, and the gas samples in the sampling cavity can be uniformly and thoroughly discharged into the infrared gas analyzer to be detected; and the to-be-detected gas sample in the sampling cavity is isolated from the introduced high-pressure gas by the piston plate, so that the detection precision of the to-be-detected gas sample can be guaranteed.

The invention discloses a pilot-operated type self-driving fluid release valve, and belongs to the field of control valves. Comprising a main valve assembly, a pilot valve assembly and a one-way valve assembly. Valve bodies of the pilot valve assembly and the one-way valve assembly are integrated on a main valve body of the main valve assembly; the main valve assembly comprises a main valve body, a main valve piston, a main valve element and a main valve spring. The pilot valve assembly comprises a pilot valve air control opening, a pilot valve inlet, a pilot valve outlet channel and a pilot valve pressure relief opening. The one-way valve assembly is arranged at an outlet of the main valve and used for blocking medium backflow. Through mechanical configuration reconstruction and system integration innovation, the technical contradiction of the liquid rocket engine high-pressure gas control valve in weight, response speed and reliability is thoroughly solved.

The invention provides an experiment control device for researching an ejection system. The experiment control device comprises a high-pressure power source pipeline, a multi-stage ejector pipeline and a control and data acquisition system, the high-pressure power source pipeline is used for providing high-pressure gas for the multi-stage ejector pipeline, so that each stage of ejector in the multi-stage ejector pipeline can work normally; the multi-stage ejector pipeline comprises a first-stage ejector pipeline to an nth-stage ejector pipeline, and all the stages of ejector pipelines are sequentially connected in a cascade form; and the control and data acquisition system is used for controlling the multi-stage ejector pipeline and acquiring data. According to the experimental control device for studying the injection system, the performance of various ejector systems can be studied, so that the ejector systems meet the design target and adapt to various variable working conditions, and the injection performance is improved.

The invention relates to the technical field of valve leakage detection, and particularly discloses an ultrahigh pressure gas valve leakage detection method and system. According to the method, a unified leakage feature vector is obtained through multi-source acquisition and processing; capturing a time sequence dependency relationship, and determining a micro leakage mode; carrying out abnormal peak detection to obtain a preliminary leakage probability; combining the initial leakage probability with real-time environmental parameters, and dynamically adjusting a judgment standard; comparing the unified leakage feature vectors through a judgment standard, fusing position coordinate triangulation positioning, judging whether micro crack leakage occurs or not, and obtaining leakage position estimation; the historical data sequence is fused, the micro crack development trend is predicted, and the early warning level is determined; and generating a corresponding response signal according to the early warning level, and outputting micro crack leakage early warning. Multi-source data fusion, dynamic threshold adjustment and position prediction can be carried out, the accuracy and robustness of micro crack leakage detection are remarkably improved, and efficient guarantee is provided for safe operation of a pipeline.

The invention discloses a current-adjustable welding machine contact tube and a using method thereof, and the current-adjustable welding machine contact tube is applied to the technical field of welding machine contact tubes. A contact tube main body is composed of a connecting section, an external thread cylinder and an extending section, and the connecting section and the extending section are designed to be detachable; according to the electric conduction nozzle, the welding wire channel in the electric conduction nozzle body can be conveniently cleaned, the abraded extending section part can be conveniently replaced, and therefore the overall replacement cost is reduced, the cleaning structure composed of the surrounding assembly and the blowing assembly is arranged, the surface of the welding wire can be wiped through the surrounding assembly when the welding wire passes through the cleaning structure, and the welding wire can be conveniently cleaned. And impurities such as burrs are removed, and dirt on the surface of the welding wire is further removed in cooperation with the injection assembly connected with high-pressure gas, so that the impurities and the dirt on the surface of the welding wire are removed before the welding wire enters the extension section, and the abrasion to the interior of the contact tube main body and the influence on the welding quality are reduced.

The invention relates to the technical field of cable bridges, and discloses a cable bridge with expansion joints, which comprises two cable bridge main bodies, expansion joint main bodies are slidably connected to the outer walls of the two cable bridge main bodies, and three air pressure sleeves are fixedly connected to the tops of the expansion joint main bodies. First air pressure cavities are formed in the inner walls of the three air pressure sleeves correspondingly, air in the first air pressure cavities and the second air pressure cavities is extruded by the extrusion assembly under the influence of the weight of the cable, so that air at the top and the bottom of a piston rod is in a high-pressure state, and when the cable at the main body part of the expansion joint vibrates, generated vibration is transmitted to a supporting plate; by means of compressibility of high-pressure gas on the two sides of the piston rod, vibration generated by the cable is absorbed, the vibration amplitude of the cable is reduced, and the situation that flexible connection between the expansion joint body and the cable bridge body easily causes increase of the vibration amplitude of the cable at the position, large pulling force is applied to the cable at the position, and the cable is easily damaged is effectively prevented.

The invention relates to the technical field of bearing detection, and discloses a shield tunneling machine bearing performance testing device which comprises a supporting table, a motor is fixedly connected to the bottom of the supporting table, a placing ring is fixedly connected to the top of the supporting table, and a fixing plate is fixedly connected to the top of the supporting table. A hydraulic cylinder is started to stretch out to drive a pushing ring to descend to make contact with a spring ring, the spring ring descends, a first connecting rod rotates, a clamping block is pushed to move towards the inner wall of a bearing inner ring, the spring ring descends to drive a sliding rod to descend, a sliding ring descends to extrude gas in a fixing barrel, and the clamping block drives a gas conveying pipe to move; when the three clamping blocks make contact with the inner wall of the bearing inner ring preliminarily at the same time, the gas conveying pipe can be separated from the blocking piston, high-pressure gas can enter the gas conveying pipe, the spring pressing plate is pushed to descend, the top of the bearing inner ring is extruded, the bearing inner ring can be further restrained by pressing the clamped position of the bearing inner ring, and the bearing inner ring is prevented from being damaged. And the clamping device is effectively prevented from deviating in the clamping process.

The invention discloses a spiral steel pipe weld defect detection device applied to X-ray detection, and relates to the field of steel pipe weld detection, the spiral steel pipe weld defect detection device comprises a base and a movable platform mounted at the upper end of the base, and the upper end of the base is provided with a steel pipe; a stirring roller and a lifting roller are rotationally installed at the upper end of the movable platform and located below the steel pipe fitting. According to the spiral steel pipe welding seam defect detection device applied to X-ray detection, high-pressure wind power is transmitted to the flow dividing pipeline through the pressurizing air outlet by the air blower, and the transmitted high-pressure air carries pressure to penetrate through an opening gap in the surface of the lifting roller to impact on the surface of a steel pipe; the cleaning brush at the upper end is driven to move back and forth in a reciprocating manner in cooperation with limiting of a movable plate and a limiting rod, so that surface residual impurities generated by contact of a pressurizing air outlet and a steel pipe fitting are subjected to auxiliary guiding and removing work, and flaw detection can be more accurate.

The utility model discloses a busbar, battery module and battery pack, the busbar includes at least two conducting strip, by setting the first weak part and the second weak part above the thinning area, when the pressure is released, the thinning area will be burst open by the high pressure gas in the single battery, and the impact force will break the first weak part and the second weak part. Therefore, the pressure release valve can efficiently and smoothly release pressure; and when the first weak part and the second weak part are disconnected, the circuit connection between the two adjacent single batteries is also disconnected, so that short-circuit protection is realized, and finally, dual protection of pressure relief protection and battery cell short-circuit protection is synchronously realized. In addition, the first weak part and the second weak part are fused due to overcurrent when being subjected to strong current, and dual protection can also be achieved. The battery module with the busbar can realize dual protection of internal pressure relief protection and battery cell short-circuit protection of the battery module. The battery pack with the battery module has higher safety performance.

The utility model provides a fuel gas pressure reducing valve with a pilot-operated type fuel gas cut-off valve, which comprises a valve seat, a valve cover and a piston assembly, a gas inlet and a gas outlet are arranged on the valve seat, and the cut-off valve assembly is arranged on a gas inlet channel communicated between the gas inlet and the piston assembly and used for controlling on-off of gas flow in the pressure reducing valve. A three-way electromagnetic valve assembly is arranged in the valve seat on one side of the stop valve assembly, the three-way electromagnetic valve assembly is provided with an air inlet hole, a second air outlet hole and a third air outlet hole, and high-pressure air entering from the air inlet connector is communicated to the air inlet hole of the three-way electromagnetic valve assembly through a first process hole formed in the valve seat; the third air outlet hole is communicated with the back face of the stop valve assembly through a second process hole formed in the valve seat, and the second air outlet hole is communicated with the air outlet through a third process hole formed in the valve seat. Through the design of the independent three-way electromagnetic valve, a valve element switch is controlled by adopting very small electromagnetic force, so that the airflow direction is controlled, and switch control over the high-pressure main loop stop valve assembly is achieved.

The invention belongs to the technical field of natural gas transportation and distribution filtration of natural gas stations, and relates to a filter and a filter element backwashing method thereof without stopping natural gas transportation and distribution filtration. The filter comprises a main cylinder, a main filter element and a backwashing device, wherein the backwashing device comprises an air blowing cylinder arranged in the main filter element, a high-pressure hose used for conveying high-pressure gas into the air blowing cylinder and a driving mechanism used for driving the air blowing cylinder to reciprocate in the main filter element in the axial direction; the air blowing cylinder is of a cylindrical structure with two closed ends, and a plurality of air blowing holes are formed in the side wall; the high-pressure hose is located in the main filter element, the bottom end of the high-pressure hose is connected to the top end of the air blowing cylinder, the top end of the high-pressure hose is externally connected with a high-pressure air supply source, and high-pressure air entering the air blowing cylinder is blown out through the air blowing holes to backwash the main filter element from inside to outside. The air blowing cylinder of the filter can perform movable backwashing in the main filter element, so that the whole main filter element is helped to recover the filtering effect, and the backwashing device can independently operate to backwash the main filter element while the filter continuously filters natural gas.

The invention discloses a power transmission line insulator dual defense system and method, and belongs to the technical field of power transmission line maintenance, in the system, a power supply subsystem generates, stores and conveys high-pressure gas, and a primary defense subsystem and a secondary defense subsystem are respectively communicated with the power supply subsystem through high-pressure conveying hoses to obtain a high-pressure gas source; the first defense subsystem is arranged around an insulator of the power transmission line and forms an annular air curtain to prevent rain and snow from being attached to the surface of the insulator; the secondary defense subsystem detects and removes rain and snow breaking through the annular air curtain; the photovoltaic power supply subsystem is used for providing power for the whole defense system; all the subsystems are electrically connected with the intelligent control subsystem, and the intelligent control subsystem is used for coordinating starting, operation and parameter adjustment of all the subsystems. The problems that an existing anti-icing technology is high in energy consumption and slow in response, an icing micromechanism is difficult to capture, and protection is insufficient due to the fact that extreme working conditions are difficult to reproduce are solved, and efficient blocking and removing of rain and snow are achieved.

The invention provides a hydrogen fuel cell multifunctional detection device, a detection method and a production detection line. In the device, an electric pile code scanning unit scans a bar code on a to-be-detected cell electric pile to obtain identity information of the cell electric pile; the air tightness detection unit conveys high-pressure gas into the battery stack to perform air tightness detection on the battery stack after limiting, fixing and sealing connection are performed on the battery stack; after the screws are connected in series and the positive and negative copper bars of the battery stack are connected, the insulation detection unit obtains the resistance value between the screws, the resistance value of the stack and the current value between the screws and the stack so as to carry out insulation detection on the battery stack; the central control unit controls the airtightness detection unit and the insulation detection unit to perform airtightness and insulation detection; and receiving the identity information, the air tightness detection data of the air tightness detection unit and the insulativity detection data of the insulation detection unit, and obtaining an air tightness detection result and an insulativity detection result of the corresponding electric pile based on the identity information, the air tightness detection data and the insulativity detection data.

The invention provides an intelligent fuse, and belongs to the technical field of circuit protection, and the intelligent fuse is characterized in that an upper housing is provided with at least one excitation chamber, the excitation chamber is internally provided with at least one excitation part and at least one impact part, and the excitation part releases high-pressure gas when receiving any one of an external trigger signal and an internal trigger signal; the lower shell is provided with at least one cooling cavity; the current-conducting plate is arranged between the upper shell and the lower shell, and the impact part moves towards the direction where the cooling cavity is located under the thrust action of the high-pressure gas so as to cut off the current-conducting plate; the self-control module is arranged outside the shell and comprises a current detection unit and a processing unit, and the current detection unit is used for detecting a current signal on the conductive plate; the processing unit is used for generating an internal trigger signal according to the current signal. The beneficial effects of the invention are that a dual-trigger mechanism and redundancy design of an internal trigger signal and an external trigger signal are adopted, so that normal action can still be ensured when any signal fails, and the breaking reliability is improved.

The utility model relates to the technical field of livestock and poultry manure fermentation, in particular to a fermentation device for quickly decomposing livestock and poultry manure, which comprises a fermentation tank mounted on a bottom plate, and a pressure relief mechanism for automatically adjusting the pressure in the fermentation tank is arranged on the fermentation tank. A fermentation mechanism for mixing livestock and poultry manure to promote fermentation is arranged in the fermentation tank. The telescopic spring is impacted by high-pressure gas to extend, so that the rubber pad is pushed to slide to the position below the pressure relief hole formed in the pressure relief pipe, the pressure is discharged through the pressure relief hole, and the phenomenon that the tank body is broken due to the fact that the pressure in the fermentation tank is too high is avoided; according to the gas purification device, harmful substances, dissolved in water, in gas are purified, peculiar smell can be removed to a certain degree, the peculiar smell in the gas is adsorbed and removed again in cooperation with the activated carbon plate, and therefore the situation that the peculiar smell of the fermentation gas is dispersed in a fermentation place and pollutes the environment is avoided.

The invention provides an electric pressure cooker. The electric pressure cooker comprises a cooker body and a cooker cover detachably arranged on the top of the cooker body. An air cavity is formed in the cooker cover, and an exhaust valve communicated with the cooker body is mounted in the air cavity; a first air hole for exhausting air is formed in the top of the air cavity; a second air hole and a third air hole are formed in the bottom of the air cavity; the pot body is provided with a second air channel and a third air channel, the air outlet end of the second air channel is located in the middle of the pot body, and the air outlet end of the third air channel is located at the bottom of the pot body; an air exchange mechanism and an air release mechanism are mounted at the air cavity; the ventilation mechanism changes the unblocking and blocking states of the air holes through adjustment, and only outward exhaust is achieved; the gas release mechanism can open the gas release valve through adjustment, so that high-pressure gas in the pot body is discharged; the exhaust direction of high-pressure air leakage can be adjusted and changed, different use environments are met, and the applicability is improved.

The invention discloses a multi-mechanical-arm collaborative insulator mold cleaning method which is specifically implemented according to the following steps that firstly, an insulator mold cleaning assembly is arranged, the assembly comprises an insulator mold to be cleaned and a blowing mechanical arm installed right in front of the insulator mold, and a high-pressure nozzle is arranged at the tail end of the blowing mechanical arm; the high-pressure nozzle is driven by an air pressure system, the air pressure system is connected with the blowing mechanical arm through a pipeline, provides high-pressure gas for the blowing mechanical arm and executes the blowing action, and a pressure sensor is further arranged on the blowing mechanical arm; the device further comprises a projection detection mechanical arm located above the side of the insulator mold, and the projection detection mechanical arm integrates a stripe projector and a camera and is used for detecting the surface cleanliness. The device further comprises a dust-sticking mechanical arm and the like. Then self-adaptive dust blowing is carried out, the mold is cleaned through a dust-sticking mechanical arm, and finally the cleaning effect is evaluated. The problems that in the prior art, the detection precision of the high-reflection three-dimensional complex curved surface is insufficient, and regulation and control in the cleaning process are extensive are solved.

A bleed system including a jet pump system configured to provide a supply gas comprising at least one of a higher pressure gas, a lower pressure gas, or a mixture of the higher pressure gas and the lower pressure gas. A needle body defines a throat region between a nozzle wall and the needle body. The needle body is configured to cause a gap between a rear needle surface of the needle body and the nozzle wall to decrease as the rear needle surface extends toward the throat region. The jet pump system is configured to discharge the higher pressure gas through the throat region and mix the higher pressure gas and the lower pressure gas in a mixing portion of an exhaust portion.

The invention provides low-temperature supersonic airflow collision ultramicro equipment, which belongs to the field of material crushing and processing, and comprises a feeding device, an airflow collision device, a closed-loop type circulation grading device, a material receiving device, a gas cooling device and a gas inlet device, and the gas inlet device is used for providing a high-pressure gas source for the equipment; the gas cooling device cools the high-pressure gas to a preset low temperature, and then the high-pressure gas is fed into the gas flow collision device after being subjected to pressure regulation through the gas feeding pipeline; the airflow collision device comprises a collision chamber and at least one pair of opposite nozzles, the horizontal distance between the paired nozzles can be adjusted, the air supply pipeline and the feeding pipeline are connected with the nozzles after being intersected, and high-pressure air is sprayed out through the nozzles to form supersonic jet flow to drive materials to collide with each other in the collision chamber. And the collided materials are subjected to closed-loop circulation classification and then enter a material receiving device, and large particles are subjected to circulation collision crushing again. The ultramicro equipment disclosed by the invention can be used for crushing various plant raw materials into 1-10 microns, and has a good application prospect.

The invention belongs to the technical field of transformers, and discloses an explosion-proof sealed oil-immersed transformer which comprises an oil-immersed transformer body, a mounting frame is fixedly mounted at the top of the oil-immersed transformer body, an oil conservator is fixedly mounted on the mounting frame, the bottom of the oil conservator communicates with an explosion-proof oil pipe, and the explosion-proof oil pipe communicates with an oil storage tank. The explosion-proof oil pipe penetrates through and extends into the oil-immersed transformer main body, an oil pump is arranged on the explosion-proof oil pipe, an automatic pressure relief mechanism is arranged on the oil-immersed transformer main body, and the automatic pressure relief mechanism comprises a pressure relief valve cylinder. According to the scheme, through a spring-sealing plug linkage structure in the automatic pressure relief mechanism, when the internal pressure exceeds a threshold value, a sealing plug is pressed to move upwards, a pressure relief hole communicates with a pressure relief cavity, high-pressure gas is directionally exhausted through a one-way exhaust valve, and shell burst is avoided; after the pressure recovers, the reset spring automatically resets the sealing plug, the sealing performance is maintained, external impurities are prevented from invading, manual intervention is not needed, and repeated and reliable pressure relief is achieved.

The utility model relates to the technical field of metal mechanical property detection testing equipment, in particular to a metal material and hydrogen environment compatibility testing device which comprises an upper clamp, a vacuum pump and a first gas storage bottle, the first gas storage bottle is used for storing high-pressure gas of types required by testing, one end of the upper clamp is detachably connected with a sample, and the other end of the upper clamp is detachably connected with a second gas storage bottle. The upper clamp is used for blocking a central channel of a sample and forming a first cavity body, the vacuum pump and the first gas storage bottle are respectively communicated with the first cavity body, and during use, the upper clamp can be detached from one end of the sample, and the sealed first cavity body is formed between the upper clamp and the central channel of the sample; the second cavity cools the sample to a required temperature, or the sample is heated to the required temperature through the induction heating coil, so that the temperature control during the test of the sample is realized, the test requirement is met, the test accuracy is improved, the test cost is reduced, and the test safety is guaranteed.

The invention discloses a high-pressure gas high-flow rapid filling connector controller and method.The controller comprises a gas inlet connector pipe, a main valve element set and a movable valve element set are installed in the gas inlet connector pipe, and a main sealing seat is installed in the gas inlet connector pipe; the main valve element set is provided with a valve element main flow channel and a gas channel. The movable valve element set is movably arranged at one end of the main valve element set in a sleeved mode, a main valve sealing gasket is installed on the movable valve element set, and the flow of the gas channel is controlled through the contact degree of the main valve sealing gasket and the main sealing seat. The movable valve element set is provided with a pilot flow channel, the pilot flow channel guides pilot gas to flow in the direction away from the main sealing seat and then converge into the valve element main flow channel, and the pilot gas is a part of gas shunted to the front of the main valve element set from the gas inlet connector pipe. After the valve element is improved, the first flow guide channel is utilized, and by means of the pressure difference between the two ends of the valve element, a worker is assisted in controlling high-pressure gas.

The utility model relates to the technical field of power distribution equipment, specifically a high-safety power distribution cabinet with automatic pressure relief function, including: a cabinet body, a pressure relief device is provided on the top of the cabinet body, and a protective cover is provided on the top of the pressure relief device; the pressure relief device includes a fixed plate and a pressure relief plate, and the fixed plate and the pressure relief plate are connected by a locking assembly; an unlocking assembly is provided in the fixed plate, and the unlocking assembly can release the lock of the locking assembly. The utility model utilizes the connection between the lock tongue and the bypass groove to limit the rotation of the pressure relief plate, and utilizes the elastic force of the locking spring to prevent the lock tongue from moving under normal pressure. By arranging an unlocking assembly in the bypass groove, the unlocking piston is driven by high-pressure gas to move toward the side opening of the bypass groove, thereby driving the lock tongue to separate from the bypass groove, and then the pressure relief plate is driven by high-pressure gas to rotate upward, and the high-pressure gas is discharged from the opening of the pressure relief plate to achieve automatic pressure relief. During the pressure relief process, the pressure relief plate will not be deformed and can be reused, thereby reducing the cost of use and maintenance.