4483 results about "Relief valve" patented technology

An incubator can include a body, a bed supported by the body, and a canopy defining an interior chamber that includes the bed. The incubator can include any combination of various features configured to reduce sound energy inside the incubator. The incubator can include a passive radiator, a Helmholtz resonator, a meta material absorber, an active noise cancelation system, a vented door latch assembly, an acoustically permeable seal, a pressure relief valve, a lift mechanism that uses a belt drive, double paned canopy walls, a bin with insulating compliant elements, a manual pressure release valve, a pressure differential notification system, non-parallel or curved canopy walls, a mattress with reticulated foam, and / or an acoustic filter.

A pump system includes a housing defining a first internal volume and a second internal volume, a first piston positioned to separate the first internal volume into a first chamber and a second chamber, a second piston positioned to separate the second internal volume into a third chamber and a fourth chamber, a first inlet check valve configured to permit fluid flow into the first chamber, a second inlet check valve configured to permit fluid flow into the third chamber, a directional control valve (DCV) repositionable between (a) a first position where the DCV is configured to fluidly couple the second chamber to a high pressure fluid source and (b) a second position where the DCV is configured to fluidly couple the fourth chamber to the high pressure fluid source, and a relief valve configured to supply a fluid to the DCV through an orifice to move the DCV.

The invention discloses a pipeline pressure relief structure and a pressure relief valve with the pressure relief structure, and relates to the field of pressure relief valves, the pipeline pressure relief structure comprises a main valve, a tower-shaped valve core, a pressure gauge, an amplification gear and a labor-saving lever, and changes the situation that in the prior art, precision of a pilot valve is adjusted through a needle valve, and the needle valve and the pilot valve need to continuously play a sensing role through similar structures such as springs; a tower-shaped valve element is arranged in a main valve to conduct multi-section control over flow, then driving force on the tower-shaped valve element is amplified in a multiplied mode through a hinge rod, an amplification gear and a labor-saving lever, accurate adjustment of the tower-shaped valve element is guaranteed, and the control precision of equipment is guaranteed. In addition, the pressure gauge is connected in the pilot valve through the oil bag, and the carry block facilitating adjustment of the elastic force of the piston by the spring is arranged, so that the pilot valve can be calibrated according to the display of the pressure gauge and the flow change of the main valve, the service life of the pressure relief valve structure is prolonged, and more accurate adjustment and use of the pressure relief structure are ensured.

The invention provides a pressure release valve with an active silencing function, which comprises a valve body provided with a liquid inlet cavity and a pressure release cavity which are communicated with each other; the bypass pipe is communicated with the liquid inlet cavity; the pressure relief assembly comprises an adjusting part, a pressure relief elastic part and a pressure relief valve element, the pressure relief valve element and the pressure relief elastic part are arranged in the pressure relief cavity, the adjusting part is movably arranged on the valve body, and the pressure relief elastic part is arranged between the adjusting part and the pressure relief valve element in a pressed mode; the piezoelectric actuator is arranged on the liquid inlet cavity, the noise reduction elastic piece is arranged between the driving end of the piezoelectric actuator and the pressure relief valve element in a pressed mode, and the piezoelectric actuator is configured to drive the noise reduction elastic piece. According to the pressure release valve with the active noise elimination function, an active noise elimination technology is introduced into pulsating noise control of the pressure release valve in the mode of arranging the piezoelectric actuator, and the acting force applied to the pressure release valve element can be adjusted through the noise reduction elastic piece so that transient noise caused by pulsating pressure when the pressure release valve element moves can be eliminated.

The invention discloses horizontal rotary fermentation equipment for food processing and a fermentation method, and relates to the technical field of food processing ferment.The horizontal rotary fermentation equipment comprises a tank body, a feeding hopper, a discharging pipe, a barometer, an exhaust pipe and a pressure relief valve, the circumferential outer wall of the tank body is fixedly connected with a fixing frame, and a supporting frame is arranged below the tank body; the fixing frame is fixedly connected with the supporting frame, and a first stirring assembly and a second stirring assembly which are used for fully fermenting materials are arranged in the tank body. According to the invention, through the arrangement of the first stirring assembly and the second stirring assembly, under the synergistic effect of the driving force provided by the power assembly and the stirring direction changed by the reversing assembly, efficient stirring of materials is realized, and good conditions are created for fermentation; the defoaming assembly is arranged, so that the problem that the fermentation quality is influenced by excessive bubbles during stirring of traditional horizontal fermentation equipment is effectively solved, and the stability and high efficiency of the food processing and fermentation process are guaranteed on the whole.

A pressure monitor for vehicle tire inflation includes a hollow hand-held portion, a pressure digital indicator, an airflow control valve sleeve, a quick fit interface, an inflation hose, a valve core joint assembly and an air relief valve, wherein the hollow hand-held portion has a top end threaded with the pressure digital indicator and a bottom end provided with a dual end threaded part, a lower portion of the dual end threaded part is threadably provided with the airflow control valve sleeve, an end of the airflow control valve sleeve is provided with the quick fit interface, the inflation hose is hermetically connected and provided at one side of a top portion of the hollow hand-held portion, an end of the inflation hose is provided with a quick connect threaded part, and the valve core joint assembly is provided at an end of the quick connect threaded part.

The invention relates to the technical field of transformers, in particular to an oil-immersed power transformer which comprises a hollow rod, a first round rod, a first piston, a first spring, a cylinder, a second round rod, a second piston, a limiting block and a ventilation assembly. A hollow rod is fixedly connected to the diaphragm; a first round rod is slidably connected to the hollow rod. A first piston is fixedly connected to the first round rod and makes contact with the lower end of the hollow rod. A cylinder is fixedly connected to the box body; through cooperation of the hollow rod, the first round rod, the first piston, the first spring, the cylinder, the second round rod, the second piston, the second spring and the limiting block, pressure relief operation can be automatically completed when pressure in the transformer body is increased abnormally, and therefore the transformer body can be protected; and the transformer oil sprayed out at a high speed can be intercepted and prevented from being sprayed to the outside to pollute the environment, the intercepted transformer oil is gathered on the upper side of the diaphragm, manual collection of the transformer oil can be facilitated, and waste is avoided.

The invention provides a liquid cooling CDU system with an intelligent pressure balance tank, and relates to the technical field of electronic equipment heat dissipation, and the system comprises a main circulation loop, the intelligent pressure balance tank, a liquid supplementing loop, a control system and a monitoring module. The intelligent pressure balance tank is provided with a liquid level sensor set, an exhaust valve installed on the non-top portion and a mechanical pressure release valve. The installation height of the exhaust valve is preset so that a buffer air layer can be reserved. The control system responds to signals of the liquid level sensor and controls opening and closing of the liquid supplementing loop and the exhaust valve. Through the design of a buffer air layer and a non-top valve group of the intelligent pressure balance tank, automatic liquid supplementing and graded pressure protection logic are combined, the problems of manual liquid supplementing lag, large pressure fluctuation, high safety risk and the like of a traditional liquid cooling CDU system are solved, and the liquid cooling CDU system is suitable for efficient heat dissipation of a data center and high-power electronic equipment.

The invention relates to a scroll compressor. The scroll compressor comprises a static scroll plate, a dynamic scroll plate, a high-pressure partition plate, a high-pressure cover plate, an exhaust valve and a pressure release valve. Wherein the orbiting scroll is configured to be matched with the static scroll to form a compression cavity with variable volume; the high-pressure partition plate is arranged on the static scroll plate; the high-pressure cover plate is connected with the high-pressure partition plate to form an exhaust cavity; the exhaust valve is configured to be communicated with the compression cavity and the exhaust cavity when the exhaust pressure of the compressor is reached; the pressure release valve is arranged on the high-pressure partition plate and is configured to communicate the compression cavity with the exhaust cavity when the pressure in the compression cavity exceeds the exhaust pressure. According to the scroll compressor disclosed by the invention, the pressure release valve is arranged on the high-pressure partition plate, and high pressure in the exhaust cavity directly acts on the high-pressure partition plate instead of directly acting on the static scroll plate, so that the acting force on the static scroll plate is relatively reduced, the risk that the scroll blades of the static scroll plate are stressed and deformed is reduced, and the service life of the scroll compressor is prolonged. And the service life, the performance and the reliability are ensured.

The invention discloses a load simulation loading system based on an engineering mechanical power system and a control method thereof, and relates to the technical field of mechanical power system simulation. The load simulation loading system comprises an engineering machinery power system, a load loading system, a whole vehicle control unit and an upper computer platform. The engineering machinery power system comprises a first oil tank, a main pump, a pilot pump, a pilot control handle, a signal control valve and a multi-way valve. The load loading system comprises a three-position four-way reversing valve, a proportional overflow valve, a first proportional throttle valve, a second proportional throttle valve, an electromagnetic valve, a third proportional throttle valve and a variable pump, wherein the three-position four-way reversing valve, the proportional overflow valve and the first proportional throttle valve are connected to the multi-way valve, the second proportional throttle valve and the electromagnetic valve are connected to an outlet of the proportional overflow valve, and the third proportional throttle valve is connected between the second proportional throttle valve and the second oil tank. And the three-position four-way reversing valve is constructed to enable an inlet of the proportional overflow valve to be communicated with one of the oil port A and the oil port B of the multi-way valve in a switching manner, and an outlet of the proportional overflow valve to be communicated with the other one of the oil port A and the oil port B in a switching manner.

The invention relates to the technical field of pressure release valves, in particular to a fire-fighting pipeline linear adjusting pressure release valve and a method, the fire-fighting pipeline linear adjusting pressure release valve comprises a first valve body, and further comprises a third valve body, a second valve body, a third valve core assembly, a second valve core assembly and a third valve core assembly, the second valve body is fixedly connected to the top of the third valve body, and a second valve element assembly is connected to the interior of the second valve body; and the pressure regulating mechanism comprises a pressure assembly communicating with the water outlet end of the first valve body, and the top of the second valve body is connected with an elastic assembly. By arranging the pressure adjusting mechanism, a traditional single spring adjusting mode is broken through, the water pressure in the sealing cover and the mechanical pressure of the adjusting screw rod and the first spring are superposed to form a composite pressure relief threshold value, and a method for linearly and finely adjusting the pressure relief threshold value is added; incompressibility of a water medium is utilized, instantaneous pressure fluctuation is absorbed, fatigue failure of the spring under high-frequency impact is effectively avoided, and the device is suitable for starting and stopping of a fire pump or scenes where water hammers frequently occur.

An adding system for fire-extinguishing units includes a motor, which can be driven by an extinguishing agent stream, an adding pump, which can be driven by the motor, an adding line, and an extinguishing agent additive line. The outer wall of the working chamber of the motor is in the form of a rotation motor, which can also have the shape of a logarithmic spiral. Furthermore, the wall of the drainage housing of the motor, which is in the form of a rotation motor, can have a through-slot for letting the extinguishing agent in and / or out. Moreover, the inlet of the adding pump can be arranged such that the extinguishing agent additive can flow into the adding pump substantially parallel to the movement direction of the pistons of the adding pump. Finally, the adding pump can have an integrated relief valve.

The utility model provides a rock drill impact hydraulic control valve group and a rock drill, the valve group comprises a hydraulic control reversing valve, a first throttling hole, an electric proportional overflow valve, an overflow valve, a second throttling hole, a valve body and an electromagnetic reversing valve, the valve body is provided with a pressure oil port P, an oil return port T, an oil drainage port L, an LS oil port and a working oil port A; the pressure oil port P is communicated with an oil inlet of the overflow valve and an oil inlet of the second throttling hole through a hole channel in the valve body. An oil outlet of the second throttling hole is communicated with an oil inlet of the electromagnetic reversing valve; a working oil port of the electromagnetic reversing valve is communicated with a control oil port of the hydraulic control reversing valve; the oil return port T is communicated with an oil outlet of the overflow valve; and the oil drainage port L is communicated with an oil drainage port of the electromagnetic reversing valve, and is communicated with an oil drainage port of the hydraulic control reversing valve, an oil outlet of the electric proportional overflow valve and a control oil port at the same time. Damage of pressure building to a system and elements is eliminated, and residual impact pressure existing after oil cut-off is eliminated.

The utility model discloses a device for restraining thermal runaway of an energy storage box, which comprises a fire extinguishing agent storage tank arranged on the inner side or the outer side of a box body, a plurality of batteries are arranged in the box body, the output end of the fire extinguishing agent storage tank is respectively connected with one end of a fire detection pipe and one end of a blow-off pipe through a bottle valve, and a detection box is arranged above a pressure release valve of each battery. The plurality of detection boxes are communicated with one another, one of the detection boxes is communicated with the other end of the fire detection tube, the detection boxes and the fire detection tube are filled with inert gas, the other end of the blowing tube extends and is wound around the battery, and a plurality of nozzles are arranged on the surface of the blowing tube; the device is simple in structure, does not need a corresponding electric control mechanism to maintain the normal operation of the fire extinguishing device, is low in cost, and is beneficial to application and popularization in the field of energy storage.

The invention discloses a power plant automatic gas pipeline and a pressure control method thereof, the power plant automatic gas pipeline comprises a main pipeline, one end of the main pipeline is provided with a conveying pipeline and a pressure relief pipe, and the inside of the main pipeline can be conveyed to the inside of the conveying pipeline or the pressure relief pipe; a pressure relief valve shell is arranged at the top of the main pipeline, a pressure relief pipe is arranged on the pressure relief valve shell, and the pressure relief valve shell and the pressure relief pipe are at least used for dividing pressure of high-pressure steam in the main pipeline and conveying the high-pressure steam into the conveying pipeline or the pressure relief pipe; a stop valve is arranged on the main pipeline and is at least used for changing the flow of steam in the main pipeline; a valve element is arranged in the pressure relief valve shell in a sliding mode and at least used for controlling opening and closing of the pressure relief pipe. According to the pressure relief valve shell, when the steam pressure in the main pipeline rises, steam can enter the pressure relief pipe through the valve element and is discharged from the connecting pipe and the branch pipe, and the good protection effect on the main pipeline is achieved.

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 invention relates to the technical field of pressure relief valves, in particular to a safety pressure relief valve for a water heater, which comprises a non-return device, an isolation device, a pressure relief device and a main valve body, the pressure relief device is arranged at one end of the main valve body, and the other end of the main valve body (6) is connected with a pressure relief interface 7; a non-return device is arranged on the side, close to the pressure relief device, of the interior of the main valve body, an isolation device is arranged at the bottom, close to the non-return device, of the interior of the main valve body, the pressure relief device is used for conducting pressure relief when the pressure in the water heater is too large, and the non-return device is used for preventing water in the water heater from flowing back into the water inlet pipe. The isolating device, the non-return device and the pressure relief device are integrated in the same valve, and the number of valves in a traditional water heater pipeline is reduced, so that the pipeline does not need to be cut into multiple sections when the valve is installed, the installation steps are simplified, and the valve is easy to install.

The utility model relates to the technical field of valves, in particular to a pressure holding and releasing valve with a shock absorption function, which comprises a valve body, a valve cover, a pressure releasing guide valve, a valve rod, a main valve clack, a reset spring and a buffer mechanism, and adopts a mode of buffering rebound of the valve rod to effectively relieve impact force of the main valve clack on the valve body, reduce vibration frequency of the valve and peripheral pipelines and improve safety of the valve. The service life of the valve and the pipeline is prolonged, the sealing performance of the valve body is guaranteed, and the technical problem that the service life of the pressure maintaining and releasing valve and the peripheral pipeline is easily affected by vibration generated by frequent opening and closing conversion of the valve in the prior art is effectively solved.

The embodiment of the invention provides a pressure release valve for a train, and relates to the technical field of pressure release valves. A pressure relief valve for a train comprises an outer shell, an inner shell, a first pressure relief valve plate, a second pressure relief valve plate and a third pressure relief valve plate, the first pressure relief valve plate, the second pressure relief valve plate and the third pressure relief valve plate are sequentially mounted on the inner side of the inner shell from top to bottom, a first pressure relief spring is mounted between the first pressure relief valve plate and the second pressure relief valve plate, and a second pressure relief spring is mounted between the second pressure relief valve plate and the third pressure relief valve plate. The side end of the top of the outer shell fixedly communicates with a guide pipe, a vent hole is formed in the side end of the bottom of the inner shell, an adjusting mechanism for adjusting the pressure of the first pressure relief spring and the pressure of the second pressure relief spring is installed on the outer shell, and the two-way synchronous adjusting mechanism is arranged so that the pressure relief valve can adjust different pressures needed by different latitudes conveniently. The pressure cover is prevented from being replaced in a high-latitude area, meanwhile, the adjusting pressure of a single pressure relief spring can be relieved, fatigue damage of the pressure relief spring is reduced, aging of the pressure relief spring is slowed down, and therefore the overall service life of the pressure relief valve is prolonged.

To provide a hydraulic vibration isolator having a poppet valve, which comprises a safety function for preventing damage due to overload, and can be easily replaced with an existing product without increasing the size of the existing product.SOLUTION: A poppet valve device 9 comprises a valve case 11, a valve body 13 that opens and closes a valve seat 11a opening into the valve case 11, and a spring 14 that biases the valve body 13 in an opening direction. The valve case 11 comprises: a flange part 11b that is housed in an outer case 10 communicating with an oil passage 8, slidably penetrates a relief valve seat 10a that opens into the outer case 10 to branch off and merge with the oil passage 8, and abuts against the opening peripheral edge of the relief valve seat 10a; and a relief oil passage 11c formed between a side part and an inner wall of the outer case 10 by cutting out a side part. The valve case 11 is biased by a spring 12 in a direction of closing the relief valve seat 10a. In the poppet valve device 9, excessive oil pressure causes the flange part 11b of the valve case 11 to separate from a valve seat 10a of the outer case 10, and the oil pressure is released through the relief oil passage 11c.SELECTED DRAWING: Figure 5

The utility model discloses a methanol fuel supply system of a ship dual-fuel generator, which comprises a methanol fuel supply main pipeline, the methanol fuel supply main pipeline comprises an input pipeline and an FVT input pipeline, and a booster pump, a safety relief valve, a heat exchange system and a filter are sequentially arranged between the input pipeline and the FVT input pipeline. According to the utility model, a high-integration and compact skid-mounted design is adopted, the insufficiency of the ship space is fully considered, and under the condition that the original ship space is utilized, the methanol fuel which is free of impurities and meets the standard can be continuously and stably supplied to the FVT; and a large number of safety measures are designed, so that leakage and seepage of methanol can be effectively handled, and major harm to personnel health and driving safety caused by methanol volatilization is prevented.

The automatic cover plate comprises a base, a seat ring and a toilet cover, the base is provided with an air compression device and a pneumatic limiting device, the air compression device is provided with an air return structure, and the pneumatic limiting device is provided with a slow leakage valve; the seat ring is rotatably mounted on the base, and the seat ring in a seated state can close the slow leakage valve; the barrel cover is rotationally installed on the base and is in transmission fit with the air compression device, a first reset structure matched with the pneumatic limiting device is arranged between the barrel cover and the base, and when the barrel cover rotates from the closed position to the open position, the barrel cover drives the air compression device to exhaust air in the air compression device to the pneumatic limiting device through the first flow channel; the pneumatic limiting device is driven to limit work of the first reset structure. According to the automatic cover plate, the barrel cover can be automatically closed after a period of time of defecation of a user, the problem that the user forgets to cover the barrel cover after defecation is solved, and the user is allowed to open or close the barrel cover at any time according to needs.

A fluid system is provided for an aircraft engine. This fluid system includes a lubricant reservoir and a pressure relief system. The lubricant reservoir includes an internal volume. The pressure relief system includes a sensor system, a pressure relieve valve and a controller. The sensor system is configured to provide sensor data indicative of an air pressure within the internal volume. The pressure relief valve is fluidly coupled with the internal volume. The controller is configured to control operation of the pressure relieve valve based on the sensor data.

The utility model discloses a one-way valve with a pressure relief protection function, and particularly relates to the technical field of one-way valves, which comprises a valve body, a discharge pipe is arranged at one end of the valve body in a penetrating manner, an outer valve sleeve is arranged on one side of the valve body in a penetrating manner, a pressure relief mechanism is arranged in the outer valve sleeve, and the pressure relief mechanism comprises a pressure relief valve seat arranged in the outer valve sleeve. A guide groove is formed in the outer valve sleeve, a guide ring is slidably arranged in the guide groove, a pressure relief valve element is fixedly arranged in the guide ring, a pressure relief spring is fixedly arranged at the top of the pressure relief valve element, an adjusting disc is slidably arranged on the inner wall of the valve body, and a threaded rod is rotatably arranged on one side of the adjusting disc. When the fluid pressure abnormally rises, the pressure relief channel can be automatically opened, the one-way valve and a conveying system are effectively protected, the position of the pressure relief valve element can be conveniently and manually adjusted, pressure relief parameters are flexibly controlled, and the requirements of different working conditions are met.

The utility model discloses a high-pressure inflation pipeline structure wound on an IV-type hydrogen storage cylinder inner container, which comprises a nitrogen cylinder, the output end of the nitrogen cylinder is sequentially connected with a high-pressure reducing valve, a one-way valve, a low-pressure reducing valve, a pressure release valve, a pressure gauge and a stop valve through a high-pressure connecting pipe, and the stop valve is connected with the IV-type hydrogen storage cylinder inner container. The high-pressure inflation pipeline is provided with the high-pressure reducing valve, the one-way valve, the low-pressure reducing valve, the pressure release valve, the pressure gauge and the stop valve, so that the functions of monitoring, adjusting and pressure release of the internal pressure during winding of the IV-type hydrogen storage cylinder liner can be realized, and the problem that the IV-type hydrogen storage cylinder liner is expanded and broken due to overlarge pressure or insufficient support due to oversmall pressure during winding and inflation is avoided; and the normal use and the use safety of the IV-type hydrogen storage bottle liner winding are ensured.

The invention relates to a battery pack and a new energy vehicle. The battery pack comprises a box body, and a battery pack module, an insulating spacer and a liquid cooling plate are sequentially arranged in the box body; a flue and a liquid cooling flow channel are arranged in the liquid cooling plate; a first smoke outlet and a second smoke outlet which are communicated with the flue are respectively formed in the upper surface and the lower surface of the liquid cooling plate; after the explosion-proof valve is opened, gas in the battery cell enters the flue through the first smoke outlet and is discharged outwards along a pressure relief path at the bottom of the battery pack through the second smoke outlet; the pressure relief valve is ingenious in design, it is ensured that gas is effectively discharged in the pressure relief process, and accumulation of internal pressure is reduced; the flue and the liquid cooling flow channel are arranged in the liquid cooling plate at the same time, so that the liquid cooling plate has dual functions of pressure relief and heat dissipation, forced cooling can be performed through cooling liquid while the battery cell is subjected to pressure relief, coordination of thermal runaway suppression and thermal management is realized, and the service life of the battery cell is prolonged; and the battery pack module does not generate short circuit through the insulating sheet when the battery cell is in thermal runaway, so that the smoothness of the pressure relief channel and the electrical safety are ensured.

The invention provides an aviation hydraulic plunger pump fault mode injection simulation hydraulic system and method, and belongs to the field of aerospace. An oil inlet of the aviation hydraulic plunger pump is connected with a fault injector to achieve simulation of various fault modes, and through cooperation of a two-position three-way reversing valve, a related speed regulating valve, an overflow valve, a three-position four-way proportional servo valve and other components, various load conditions and different onboard working conditions can be simulated. In the simulation load branch, a throttling type load, an overflow type load and a throttling-overflow type load can be simulated by adjusting a third proportional speed regulating valve, a second proportional overflow valve and a fourth proportional speed regulating valve; in the reproduction branch of the aircraft wing actuation working condition, an actuation cylinder can be driven by a three-position four-way proportional servo valve to overcome a damping-spring-guide rail load simulation unit, the real working state during wing actuation can be reproduced, and fault reproduction and accurate recognition of an aviation hydraulic plunger pump can be achieved. And the reliability and health state prediction capability of an aviation hydraulic plunger pump fault diagnosis algorithm are improved.

The utility model provides a water heating assembly of an instant electric water heater, which comprises an electric heating component and a heating liner, the heating liner is provided with an inner cavity with an opening at the upper end, the heating end of the electric heating component is inserted into the inner cavity from top to bottom, and the upper end of the electric heating component and the upper end of the heating liner are fixed and peripherally sealed; a water inlet connector and a water outlet connector which are communicated with the inner cavity are formed in the side wall of the heating container; a pressure relief valve seat is arranged on the outer wall of the heating container, a pressure relief channel is formed in the inner side of the pressure relief valve seat, a through hole communicated with the inner cavity and the pressure relief channel is formed in the side wall of the heating container, and a pressure relief hole communicated with the pressure relief channel is formed in the pressure relief valve seat; a valve element assembly is arranged in the pressure relief channel. When the water pressure in the inner cavity exceeds the opening pressure of the valve element assembly, the valve element assembly is opened, and water located in the inner cavity is discharged through the through hole, the pressure relief channel and the pressure relief hole in sequence for pressure relief. According to the utility model, the heating liner can be effectively prevented from bursting, and the potential safety hazard is eliminated.

The invention provides a hydraulic power device for a plate drawing system and a plate drawing control method. The hydraulic power device comprises a first hydraulic pump driven by a motor, a control valve set and an energy accumulator. The control valve group comprises a one-way valve, a first unloading valve, a proportional overflow valve, a proportional servo valve and a second unloading valve; the second end of the first hydraulic pump is connected with an inlet of the one-way valve and the first end of the first unloading valve; an outlet of the one-way valve is connected with the first end of the proportional overflow valve, an oil inlet of the control end of the proportional servo valve, the energy accumulator and the first end of the second unloading valve. The second end of the first unloading valve is connected with the oil tank; the second end of the proportional overflow valve is connected with the oil tank; the execution end of the proportional servo valve is connected with an oil port of an execution oil cylinder of the plate drawing system, and the execution oil cylinder is used for pushing a drawing plate of the plate drawing system; an oil outlet in the control end of the proportional servo valve is connected with the oil tank; the second end of the second unloading valve is connected with the oil tank, and power energy capable of generating instantaneous high pressure can be provided for the drawing plate.