121results about How to "Achieve pressure relief" patented technology

The invention discloses a control valve with a cold water drainage function and a switching valve device. The control valve comprises a valve body part, a piston, a sliding pipe, a temperature-sensitive part, a back pressure spring and a handle mechanism. The valve body part is provided with an air inlet and an air outlet. The piston is slidably connected into the valve body part along an X direction. The sliding pipe is slidably connected into the valve body part along an X direction and sleeves outside the piston. Relative sliding between the sliding pipe and the piston is achieved. A connection and blockage passage connecting a water inlet with a water outlet is formed between the piston and the sliding pipe. Connection and blockage of the connection and blockage passage can be controlled by relative sliding of the sliding pipe and the piston. The temperature-sensitive part is installed in the valve part body and capable of abutting against the piston in order to generate abutting force. The back pressure spring is installed in the valve body part and capable of abutting against the piston in order to generate elasticity. The elasticity and abutting force are reversely arranged along an X direction. The sliding pipe is driven to slide by the handle mechanism. The control valve with the cold water drainage function and the switching valve device have following technical effects: the cold water drainage function is fulfilled; the function of opening or stopping hot water or cold water is achieved; and a compact structure is obtained.

The invention provides a vehicle oil tank lock control method and device, a controller and a readable storage medium, and relates to the technical field of vehicles. The method comprises the steps that if a vehicle control unit receives a refueling request signal sent by a vehicle machine controller, whether a vehicle meets a preset first refueling condition or not is judged; if yes, a pressure relief instruction is sent to an engine controller; and if it is detected that pressure relief of the high-pressure oil tank is completed, an unlocking instruction is sent to the vehicle body controllerand used for indicating the vehicle body controller to unlock an oil tank lock of the high-pressure oil tank. Whether a vehicle meets a first refueling condition or not is judged; the high-pressure oil tank is subjected to pressure relief on the basis that the vehicle meets the first oiling condition, and finally the oil tank lock of the high-pressure oil tank is opened after pressure relief is completed, so that the situation that the oil tank lock and the oil tank isolation valve are opened at the same time is avoided, the oiling risk of the high-pressure oil tank is reduced, and the oilingsafety of the high-pressure oil tank is improved.

The invention relates to a soft sealing safety valve. The soft sealing safety valve comprises a barrel-shaped valve body, a left blocking cap and a right blocking cap, wherein the left blocking cap and the right blocking cap are correspondingly fixed to the left end and the right end of the valve body; the valve body is provided with a first oil port and a second oil port; a tapered valve element is arranged in the middle of an inner cavity of the valve body, a spring is arranged between the tapered valve element and the left blocking cap, and a valve base is fixed between the tapered valve element and the right blocking cap; a stepped hole is formed in the valve base, a soft sealing ring is fixed into the stepped hole through a screw plug, and the screw plug is provided with a through hole along the central axis of the screw plug; the tip of the tapered valve element stretches into an inner hole of the soft sealing ring; the first oil port communicates with the right end of the stepped hole of the valve base, and the second oil port communicates with the portion, between the tapered valve element and the left blocking cap, of the inner cavity of the valve body. The soft sealing safety valve has the advantages of being simple in structure, safe, reliable, good in sealing effect and adjustable in switch-on pressure.

The invention provides an automatic verification system and method for a pressure transmitter. The automatic verification system and method are used for automatically verifying indication errors and return stroke errors of the pressure transmitter. The system comprises a pressure pump, a stepping motor, a standard pressure gauge, a digital multimeter and a computer; the computer is used as a corecontrol unit, and according to an input set pressure value, the computer can control forward (reverse) rotation of the stepping motor by analyzing a difference value between the set pressure value anda current pressure value so as to increase (reduce) the pressure of the system to the set pressure value. The system pressure can be maintained within a certain error range through a certain closed-loop control algorithm, and then a reference pressure source is provided for the detected pressure transmitter. After the system pressure is stabilized, the computer reads the output current value of the pressure transmitter from the digital multimeter and records the verification data of each verification point according to the format required by the verification regulation. Finally, the automaticverification of the indication error and the return error of the pressure transmitter is completed.

The invention discloses a safe exhaust valve. The safe exhaust valve comprises a valve body, a valve cover, a housing, a first spring, a second spring, a first movable baffle, a second movable baffle, an air inlet, an air outlet, a release channel, an air pressure monitor control system, an inflating pump, a cylinder pushing device and a sealing ring. The bottom of the valve body is provided with the air inlet, the top of the valve body is provided with the valve cover, and the side wall of the valve body is provided with the air outlet; the first movable baffle capable of moving up and down is arranged in the axial direction of the valve body and above the air inlet; the second movable baffle is arranged above the first movable baffle; the release channel is arranged between the air outlet and the air inlet; one side of the air inlet is provided with an air pressure monitor which is connected with the inflating pump through the control system; the inflating pump is connected with the cylinder pushing device; the cylinder pushing device is composed of a piston and a piston rod. Compared with the prior art, the safe exhaust valve has the advantages of being simple in structure, still usable after the springs are damaged, and accordingly low in cost, capable of exhausting high-pressure gas, safe and reliable.

The invention discloses an unloading valve component for an air conditioner and the air conditioner, relates to the technical field of air conditionings and is invented aiming at solving the problem that the traditional unloading valve cannot carry out pressure protection on a refrigerating system when the pressure value exceeds the maximum bearing value of the refrigerating system. The unloading valve component for the air conditioner is used for carrying out pressure protection on a refrigerant circulating system of the air conditioner and comprises an unloading valve and an overpressure protection component; the unloading valve is connected in the refrigerant circulating system, and pressure release is carried out on a refrigerant in the refrigerant circulating system by the unloading valve when the pressure of the refrigerant in the refrigerant circulating system is larger than a first preset pressure; the overpressure protection component is composed of a pressure control switch and a pressure sensor; and the pressure sensor can detect the pressure of the refrigerant at the outlet of the unloading valve and transfers a detected refrigerant pressure value to the pressure control switch, and the pressure control switch controls the refrigerant circulating system to stop working when the pressure of the refrigerant at the outlet of the unloading valve is larger than a second preset value. The unloading valve component can be used for the air conditioner.

The invention discloses an automatic urinary sediment rinsing machine with a negative pressure decompression protection function. The machine comprises an automatic rinsing component and an automaticflow guide component. The automatic rinsing component comprises a solution bottle or a solution bag which is filled with rinsing fluid and a peristaltic pump which provides power, and the peristalticpump and the solution bottle or the solution bag are connected through a rinsing pipe component; the automatic flow guide component comprises a fluid collection device which is used for containing waste fluid and a flow guide pipe component which is matched with the fluid collection device; the rinsing pipe component and the flow guide pipe component are communicated with a urinary catheterizationcomponent through a tee coupling. A negative pressure decompression valve which conducts decompression protection on negative pressure in the fluid collection device is arranged on the negative pressure pump. According to the automatic urinary sediment rinsing machine with the negative pressure decompression protection function, the whole ringing process is automatically conducted by the machine,manual operation is not needed, the pouring pressure of the rinsing fluid is constant, and the clinical working intensity is low; a catheter is not needed to be subjected to any operation in the whole rinsing process, a urethral catheter cannot be shifted, and the rinsing fluid or waste fluid cannot overflow in the rinsing process.

The invention belongs to the technical field of vehicles and discloses a closed type circular breathing system and an automobile. The closed type circular breathing system comprises an engine, an oil-gas separator, a supercharger and a one-way valve; one end of the oil-gas separator communicates with a crankcase of the engine; the other end of the oil-gas separator communicates with an air inlet pipeline through an air outlet pipeline; the air inlet pipeline communicates with the supercharger; the supercharger communicates with the engine; the inlet end of a bypass pipeline communicates with the air outlet pipeline; the outlet end of the bypass pipeline communicates with the supercharger and the engine correspondingly; and the one-way valve is arranged on the bypass pipeline, and is configured to be selectively opened, so that gas separated by the oil-gas separator can return to the engine through the bypass pipeline for pressure relief of the crankcase. The closed type circular breathing system is simple and reliable in structure, the risk of engine damage caused by sudden increase of engine pressure is reduced, effective protection of the engine is realized, and the service lifeof the engine is prolonged.

The invention discloses an energy storage box transformer substation fire extinguishing system which comprises a prefabricated cabin body. A fire extinguishing battery rack is arranged in the prefabricated cabin body, a fire extinguishing water tank is arranged below the bottom of the prefabricated cabin body, an anti-condensation isolation device which is separated from the fire extinguishing water tank is arranged at the bottom of the prefabricated cabin body and located on one side of the fire extinguishing battery rack, a corridor telescopic pedal device is arranged above the anti-condensation isolation device, and an explosion-proof pressure relief device is arranged at the top of the prefabricated cabin body. The energy storage box transformer substation fire extinguishing system is safe, reliable, low in cost, economical and practical, water-immersed fire extinguishing is well applied to an energy storage box transformer substation, and a good safety guarantee is provided for the energy storage box transformer substation.

The invention discloses a pressure release valve for blood purification, which comprises an upper valve body and a lower valve body. The upper valve body and the lower valve body are connected by a fastening screw; a screw hole is formed on the top of the upper valve body; an adjusting screw is arranged inside the screw hole; and a secondary through hole is formed in the adjusting screw axially. A guide valve rod is arranged inside the secondary through hole; the lower end of the guide valve rod extends into a secondary counter bore on the lower part of the upper valve body; a mounting table is arranged at the lower end of the guide valve rod; a spring is sleeved on the guide valve rod; the lower end of the spring is propped against the upper end face of the mounting table; the mounting table is arranged on the upper part of a packing leather; the lower edge of the packing leather is fixed between a first-level counter bore of the secondary counter bore and a first annular lug boss; a cavity is formed between the lower surface of the packing leather and the upper surface of the lower valve body at the bottom of the first annular lug boss; and a liquid inlet pipe is communicated with the cavity to seal a liquid outlet. The pressure release valve for blood purification has the advantages of small volume, simple and reliable structure, material conservation, no fluid pollution, and good sealing effect.

The invention discloses a calibrator for a hydraulic bolt tensioning jack. The calibrator comprises a testing tool, a protection unit, an ultrahigh-pressure oil source and a control unit; the testingtool comprises a top cover, a supporting part, a base, a working force sensor, a testing bolt mounting support and a testing bolt, wherein the top cover, the supporting part and the base form a closedshell, the working force sensor is fixed on the base, the testing bolt mounting support is fixed to the top end of the working force sensor, a threaded hole is arranged in the testing bolt mounting support, the central axis of the threaded hole is coaxial with the central axis of the working force sensor, and the testing bolt is a double-head bolt with threads at the two ends, one end of the testing bolt penetrates through the top cover to be screwed into the threaded hole of the testing bolt installation support, and the other end of the testing bolt is in threaded connection with a piston of the hydraulic bolt tensioning jack, the cylinder body of the hydraulic cylinder of the hydraulic bolt tensioning jack is seated on the upper surface of the top cover, and the protection unit is fixed on the top cover. According to the instrument, various specifications calibration and even large-load bolt tensioning jack calibration can be realized.

The invention discloses a multi-functional oil supplementary valve for a diaphragm pump. The multi-functional oil supplementary valve comprises a valve body, a valve seat and an oil inlet joint. The valve body is provided with a valve seat step hole, the valve seat is installed in the valve seat step hole, the valve seat is provided with three passages communicating with each other through an internal chamber, the upper end of an ejecting rod extends into the oil inlet passage and forms an oil passage gap, the oil passage gap is always in communication with the oil outlet passage, and the lower end of the ejecting rod penetrates out of the valve seat. A rotatable lever is mounted on the valve body, one end of the lever is used for being in contact with a diaphragm guide rod, and the otherend of the lever abuts against the lower end of the ejecting rod; and an oil chamber formed by a small hole of the valve seat step hole communicates with the oil inlet joint through an oil hole. A first spring and a first valve ball are arranged in the oil chamber, and the first valve ball is used for closing an opening part of the oil inlet passage of the valve seat; and the upper end of the ejecting rod abuts against the first valve ball. The oil supplementary valve can automatically supplement a hydraulic oil chamber of the diaphragm pump for oil, manual intervention can be carried out foroften oil replenishment, the short-term special working condition needs are met, and the pressure-reducing oil amount can be adjusted online.

The invention relates to a double-acting pressure relief blowout preventer, which includes an overflow pipeline, a valve body and a valve driver. The valve body includes a valve body pipeline. A pressure-sensing reed is sealed at the top of the pressure-sensing tube, a partition block is connected to the other end of the pressure-sensing tube, and a floating piston is connected to the other end of the pressure-sensing tube through the partition block, and the floating piston is slidingly connected to the partition block through a push rod. A valve block is fixed on the end of the push rod, connecting nozzles are provided at both lateral ends of the flow passage, a sliding hole is provided in the middle of the flow passage, and an annular conduction groove is provided on the valve block. A pressure relief pipeline and a pressure relief pipeline communicating with the connecting nozzle are arranged in the overflow pipeline, and the diameter of the pressure relief pipeline corresponds to the width of the conduction groove; a pressure sensing plate is connected to the top of the pressure sensing tube; A pressure-sensing cavity is provided at the end of the valve body pipeline facing away from the flow-through pipeline, and the pressure-sensing cavity is connected with the oil pipeline, and a pressure-discharging hole is provided in the middle of the pressure-sensing plate.

The invention relates to an annular pressure monitoring and controlling device for a wellhead of a deepwater oil-gas well. An upper piston in an upper hydraulic cylinder is connected with a lower piston in a lower hydraulic cylinder through a piston rod; the upper hydraulic cylinder is connected with the lower hydraulic cylinder through a connector; a pressure relief opening is formed in the side wall of the lower hydraulic cylinder; the bottom of the lower hydraulic cylinder is connected with a plurality of annular pressure tubes arranged on the periphery of a device mounting sleeve; an annular fluid inlet of the device mounting sleeve is provided with a pressure sensor; the output end of the pressure sensor is connected with a logic control system, the output end of the logic control system is connected with a hydraulic pump, and an oil outlet of the hydraulic pump is connected with an oil inlet of the upper hydraulic cylinder; when the device is used, the logic control system receives a pressure signal of the pressure sensor, and when the annular pressure signal is lower than a preset lower limit pressure value, the fluid is pressed into a sleeve annulus to be pressurized. The device has the advantages of preventing the situation that the annular air pressure is too low and accordingly oxygen is sucked in and the sleeve is corroded, and improving the air tightness.

The invention discloses an engine fuel oil system. The engine fuel oil system comprises a diesel oil filter, a high-pressure oil pump and a high-pressure oil rail. The diesel oil filter is provided with a first oil inlet and a first oil outlet. The high-pressure oil pump is provided with a second oil inlet and a second oil outlet. The high-pressure oil rail is provided with a third oil inlet and athird oil outlet. The first oil outlet communicates with the second oil inlet through a first pipeline, the second oil outlet communicates with the third oil inlet through a second pipeline, and thethird oil outlet communicates with the first oil inlet through a third pipeline. Compared with the prior art, the engine fuel oil system has the beneficial effects that not-burned fuel oil of the high-pressure oil rail is circularly utilized, the fuel oil flow in the engine fuel oil system can be increased, the fuel oil can be utilized more efficiently, and the dynamic performance and the economical efficiency of a whole vehicle are improved.

The invention discloses a control valve used for an electric heating faucet. The control valve comprises a fixed porcelain piece, a movable porcelain piece, a valve shell and a pressing rod assembly. A fixed porcelain piece groove is formed in the porcelain piece. A water inlet, a first water outlet and a second water outlet are further distributed in the periphery of the fixed porcelain piece groove. A water inlet groove and a water outlet groove are formed in the face, facing the fixed porcelain, of the movable porcelain piece. The pressing rod assembly comprises a pressing rod which controls movement of the movable porcelain piece so that the water inlet groove, the water inlet and the fixed porcelain piece groove can communicate and a regulation groove, the first water outlet and the second water outlet can communicate. By regulating the cooperation between the water inlet groove on the movable porcelain piece, a water inlet groove on the movable porcelain piece, the water inlet on the fixed porcelain piece, the first water outlet on the fixed porcelain piece, the second water outlet on the fixed porcelain piece and the fixed porcelain piece groove on the fixed porcelain piece through the pressing rod, pressure relief is conducted on a pressure cavity by disconnecting the water inlet and the water outlet and communicating the first water inlet and the second water inlet through the control valve in the opened state, and therefore when hot water is switched to cold water, cold water is output in the cold water state.

The invention discloses an emergency control system and a crane. The emergency control system comprises an emergency power module and an emergency control module. A main system control oil way, an auxiliary system control oil way, a supporting leg system control oil way, a rotary system control oil way and a pilot system control oil way are included in the emergency control module. The emergency power module comprises a power device, an emergency main pump, an emergency pilot pump, a first reversing valve and a second reversing valve. The power device is connected with the emergency main pumpand the emergency pilot pump. The emergency power module and the emergency control module are connected through a detachable first connector and a detachable second connector. After passing through the first reversing valve and the first connector, the emergency main pump is connected with the main system control oil way, the auxiliary system control oil way, the supporting leg system control oilway and the rotary system control oil way in the emergency control module. After passing through the second reversing valve and the reversing connector, the emergency pilot pump is connected with thepilot system control oil way in the emergency control module.

The invention discloses a novel pneumatic hydraulic jack, which mainly comprises a control handle, a lifting control connecting plate, an air intake control valve seat, a falling control valve seat, ahydraulic oil tank vent valve, a pneumatic hydraulic pump assembly, a hydraulic cylinder, a hydraulic oil tank, a base, a support seat and a moving wheel. Wherein the hydraulic oil tank is connectedwith and fixed to the intake control valve seat through a pneumatic hydraulic pump assembly, Hydraulic tank vent valve, Retreat control valve seat, the oil tank ventilation valve seat, the air intakecontrol valve seat, the drop control valve seat and the hydraulic cylinder are communicated with each other through a pipeline, the hydraulic cylinder and the hydraulic oil tank are connected with each other through a high-pressure pipeline, the lift control connecting plate is fixed above the air intake control valve seat and the drop control valve seat, and the control handle is installed on thelift control connecting plate; An independent intake control valve seat is provided for supplying a pneumatic hydraulic pump assembly as a power source, and an independent drop control valve seat isprovided, which is provided with a slow-speed and a fast-speed two-stage reset needle valve, so as to realize uniform speed descent.

The invention provides a vehicle lifting machine and a double-column vehicle lifting machine and relates to the technical field of lifting equipment. The vehicle lifting machine comprises a vertical column device, a support device, a hydraulic device and a safe lock device, wherein the safe lock device comprises a pressure release mechanism, a locking mechanism and a wrench mechanism; the pressurerelease mechanism is connected with the wrench mechanism through a first connecting rod; the locking mechanism is connected with the wrench mechanism through a second connecting rod; when the wrenchmechanism is pushed upwards, the pressure release mechanism is driven to move through the first connecting rod, and the pressure of the hydraulic device is released through the pressure release mechanism, therefore, the support device is descended to the locking mechanism and is locked by the locking mechanism; when the wrench mechanism is pulled down, the locking mechanism is driven to move through the second connecting rod, the locking action to the support device is released by the locking mechanism, and then the support device is capable of descending in the vertical column device. The double-column vehicle lifting machine comprises the vehicle lifting machine. The problems that in the prior art a lifting mechanism is complex in structure, inconvenient to operate, and the like, can bealleviated.

The invention discloses a high-efficiency and energy-saving TBM (tunnel boring machine) horizontal posture adjustment hydraulic system. The system comprises an oil source system I, a tight propping system II, a propelling system III and an oil tank, wherein the oil source system I is connected with the oil tank through a hydraulic pump oil suction pipeline and an overflow valve oil drain pipeline;the tight propping system II and the propelling system III are connected with the oil source system I through a high-pressure pipeline and connected with the oil tank through an oil return pipeline;and the tight propping system II and the propelling system III are not connected. According to the system, while high-accuracy propelling and horizontal posture adjustment of a TBM are guaranteed, rapid return of a propelling hydraulic cylinder and rapid output and rapid return of a tight propping hydraulic cylinder are realized; and an energy accumulator is adopted to maintain pressure of high-pressure tight propping condition of the propping hydraulic cylinder, and by means of a check valve, the tight propping hydraulic cylinder keeps pressure needed by tight propping all the time in the high-accuracy posture adjustment condition process and energy is saved as well. While forming quality of a tunnel is guaranteed, construction progress is accelerated, and energy is saved,

The invention provides an automobile engine high-pressure oil pump. The automobile engine high-pressure oil pump is simple and compact in structure. The weight, the cost and the technology complexitydegree of the high-pressure oil pump are reduced, and the arrangement space is optimized. The automobile engine high-pressure oil pump comprises an oil pump body. An oil inlet, a working oil cavity, avalve cavity and an oil outlet which sequentially communicate with one another are formed in the oil pump body, an oil pump plunger is movably arranged in the working oil cavity, and a safety valve spring, a safety valve plate, a retainer ring, an outlet valve plate and an outlet valve spring are sequentially arranged in the valve cavity in the direction from the working oil cavity to the oil outlet; an oil supply through hole is formed in the center of the retainer ring, an oil drainage through hole is formed by the side of the oil supply through hole, and the retainer ring is fixedly connected with the valve cavity; and a communicating structure is arranged on the position, corresponding to the oil drainage through hole, of the outlet valve plate, so that the two sides of the outlet valve plate communicate with each other through the communicating structure, a through hole is formed in the center of the safety valve plate, and the oil drainage through hole can be closed when the safety valve plate is tightly attached to the retainer ring. According to the automobile engine high-pressure oil pump, a plurality of parts are omitted, a bypass oil passage does not need to be arranged, the structure is simplified and the difficulty of the production technology is reduced, and the cost is reduced.