1277 results about "Safety valve" patented technology

Provided is a safety valve, a well system, and a method. The safety valve, in one aspect, includes a first portion, the first portion including a safety valve sub having a sliding sleeve, the first portion configured to be run-in-hole as part of wellbore tubing. The safety valve, in accordance with this aspect, further includes a second portion, the second portion configured to be run-in-hole after the first portion. The safety valve, in accordance with this aspect, further includes a third portion, the third portion including a mechanical connecting apparatus, the third portion configured to be run-in-hole after the second portion, the mechanical connecting apparatus configured to couple with the sliding sleeve of the first portion and the bore flow management actuator of the second portion to axially fix together the sliding sleeve and at least a portion of the bore flow management actuator.

Provided is a smart gas Internet of Things (IoT) system for gas safety management. The system includes a smart gas user platform, a smart gas service platform, a smart gas safety management platform, a smart gas indoor device sensing network platform, and a smart gas indoor device object platform. The smart gas user platform is configured as a terminal device; the smart gas indoor device sensing network platform is configured as a plurality of groups of gateway servers or a plurality of groups of intelligent routers; the smart gas indoor device object platform includes a safety valve control device object sub-platform, the safety valve control device object sub-platform is configured as indoor gas devices and gas safety detection devices; and the smart gas safety management platform includes a smart gas indoor safety management sub-platform and a smart gas data center.

The utility model discloses a hydraulic logic control system for a sidesway distance adjusting fork. Comprising an oil pump, a safety valve, a first reversing valve plate, a logic control valve block, a first hydraulic control one-way valve, a first three-way pipe, a right pallet fork distance adjusting oil cylinder, a left pallet fork distance adjusting oil cylinder, a first overload valve, a second hydraulic control one-way valve, a second three-way pipe, a third three-way pipe, a third hydraulic control one-way valve, a throttling valve, a second reversing valve plate and a second overload valve. The logic control valve block comprises a second hydraulic control one-way valve, a third hydraulic control one-way valve, a throttling valve and a second overload valve, and the second hydraulic control one-way valve, the third hydraulic control one-way valve, the throttling valve and the second overload valve are communicated through pipelines. And the first reversing valve plate is communicated with the second reversing valve plate. According to the hydraulic logic control system for the laterally-moving distance adjusting fork, the purpose of hydraulic oil way regulation and control is achieved through the arrangement of the structure.

The invention discloses a safety valve service life evaluation method based on pressure history statistics and dynamic damage accumulation. According to the method, only safety valve inlet pressure time sequence data is needed, a load cycle is extracted through an improved rain flow counting method, and the nonlinear damage increment is calculated according to an S-N curve model dynamically degraded along with the accumulated damage degree. According to the method, a self-adaptive failure probability threshold is established based on historical failure data, and probabilistic prediction of the residual life is realized. The model is clear in physical significance, only needs a single data source, significantly reduces the implementation complexity and cost, greatly improves the precision of life prediction by considering the degradation of material performance, and is especially suitable for predicting the accelerated failure risk of the safety valve in the later period of long-term service.

The invention discloses an AI-assisted self-adaptive control method and system for a gas safety valve, and relates to the technical field of gas safety control, and the method comprises the following steps: connecting the output end of an SEPIC circuit containing a continuous current mode and a discontinuous current mode with a coil of the gas safety valve; according to preset electrical and gas safety indexes, asynchronous data acquisition is carried out on the electrical and gas safety indexes, and an electrical and gas safety index sequence is obtained; utilizing an AI fusion analyzer on the edge MCU to perform interactive feature fusion analysis on the two types of sequences, and determining a self-adaptive control scheme of the gas safety valve; circuit modes are switched based on the control scheme, and the safety valve is driven to execute according to the switched SEPIC circuit. The technical problems that in traditional gas safety valve control, electric parameters and gas safety indexes are analyzed in a split mode, the circuit operation mode is single, and control response is inaccurate are solved, and the technical effects that efficient and reliable self-adaptive driving of the gas safety valve is achieved, and gas use safety and control flexibility are improved are achieved.

The invention belongs to the technical field of compressed air control, and particularly relates to a compressed air energy storage power station multistage protection and controlled discharge control method and system. Comprising the steps that a compressed air energy storage power station system comprising a discharge bypass and a discharge valve and a safety valve which are arranged on the downstream of the discharge bypass is built; when pressure abnormity occurs, first-stage response is started, operation parameters of the compressed air energy storage power station system are adjusted, or a discharge bypass is started in an overlapped mode, and the pressure abnormity trend is restrained; when the first-stage response cannot restrain pressure abnormity, the second-stage response is started, the opening degree of the release valve is adjusted, and gas release is conducted; and when the second-level response cannot restrain pressure abnormity, third-level response is started, a stepped release sequence is adopted, the opening degree of a release valve is increased, meanwhile, the opening degree of a safety valve is gradually increased to conduct gas release, and finally final release is conducted by triggering a rupture disk. According to the invention, through a stepped control strategy, the defects that a single protection device is single in protection means and easy to over-excite protection are avoided.

The invention provides an integrated pressure protection double-layer corrugated pipe vibration reduction pipe, and belongs to the field of vibration absorbers. An interlayer cavity is formed in the pipe wall of the vibration reduction pipe; gap grooves are formed in the middles of the outer end faces of the flange plates, so that steps are formed on the outer end faces of the flange plates around the edge portions of the gap grooves, and inlet holes and outlet holes are formed in the gap grooves of the two flange plates respectively. The safety valve and the one-way valve are arranged in the interlayer cavity and connected to the inlet hole and the outlet hole, the safety valve allows or limits the medium to enter the interlayer cavity through the inlet hole according to whether the external pressure exceeds the preset pressure, and the one-way valve limits the medium to flow out of the interlayer cavity only through the outlet hole. The safety valve is arranged, so that a medium in the inner layer of the pipeline enters the interlayer cavity, the pressure value in the inner layer of the pipeline is reduced, the pressure of the medium is prevented from exceeding the yield limit of an inner-layer corrugated pipe material, and the medium entering the interlayer cavity can flow back to a low-pressure area through the one-way valve; and the safety and the reliability of the double-layer corrugated pipe vibration reduction pipeline are improved.

The invention provides an extra-high pressure safety valve off-line detection method and system, and belongs to the technical field of off-line detection, and the method comprises the steps: detection preparation, starting pressure detection, pressure maintaining performance detection and safety control, and in the detection process, if the system pressure exceeds an overpressure protection value, pressurization is automatically stopped, and an alarm is triggered. Through precise detection process, multi-dimensional safety guarantee and full-process data management and control, deep detection and reliable evaluation of the safety valve performance are realized, a defense line is built for safe operation of extra-high voltage equipment, and the system has significant practical value and technical advantages.

The invention discloses a pipeline gas safety valve control method and system, and relates to the technical field of gas safety control, and the method comprises the following steps: obtaining the operation data of a gas pipeline, constructing a gas pipeline operation state portrait, extracting evolution characteristics, and generating an operation state characteristic vector; according to the running state feature vector, grading the running state, dynamically correcting a division threshold value according to historical running data, and outputting a corresponding safety valve control decision instruction; the safety valve is driven to execute opening and closing actions according to the safety valve control decision instruction, the consistency between the actual action state of the valve and the control instruction is verified, and valve execution result data is generated; writing back and updating the operation state feature construction process according to the valve execution result data; through the running state portrait and closed-loop feedback control, the problems that in traditional pipeline gas safety valve control, the control decision adaptability is not high, and the execution result lacks feedback are solved.

The utility model relates to the technical field of pneumatic control systems, in particular to a single-action pneumatic PST system, which comprises a pneumatic actuating mechanism, a cam valve and an explosion-proof junction box, a valve position transponder is arranged at the front end of the pneumatic actuating mechanism, one end of the cam valve is communicated with a filtering pressure reducing valve, one end of the filtering pressure reducing valve is communicated with a safety valve, and the other end of the filtering pressure reducing valve is communicated with an explosion-proof junction box. And one end of the explosion-proof junction box is connected with a first electromagnetic valve and a second electromagnetic valve respectively. According to the improved single-action pneumatic PST system, the first electromagnetic valve, the hand-operated direction valve and the second electromagnetic valve are adopted, and when the single-action pneumatic PST system is used, flexible control can be conducted when the single-action pneumatic PST system faces complex working conditions and different operation requirements; the explosion-proof junction box and the energy accumulator are adopted, when the single-action pneumatic PST system is used, the electrical safety of the system in a dangerous environment can be guaranteed, meanwhile, the pressure of the system can be kept within a relatively stable range, and the stability of the system during use is improved.

The utility model relates to the technical field of pile-up valves, in particular to a pile-up valve for an air compressor, which is characterized in that a cavity is arranged in a main body, an air inlet channel and an air outlet channel which are communicated with the cavity are further arranged in the main body, a one-way valve is arranged in the cavity, and the one-way valve blocks the air inlet channel to enable the air inlet channel to be communicated with the cavity; a pressure relief channel is further arranged in the main body, the air inlet end of the pressure relief channel is communicated with the air inlet channel, and the pressure relief valve is used for blocking the air outlet end of the pressure relief channel; a pressure sensor is arranged in the cavity and is used for sensing the air pressure in the cavity and transmitting a signal to the pressure release valve; according to the integrated valve, the one-way valve, the pressure release valve, the pressure sensor and the safety valve are integrated on the integrated valve body, the structure is compact, the functions are complete, machining and assembling are easy to achieve, and the integrated valve is convenient to use and popularize. The device is suitable for air compressors with small sizes.

The invention discloses an integrated energy-saving load-sensitive multi-way valve and a hydraulic system. The system comprises an oil inlet linkage valve group, a standby linkage valve group, a tipping bucket linkage valve group, a stable module linkage valve group and a movable arm linkage valve group. Valve body oil inlet P flow channels of all the valve groups, signal feedback oil way LS flow channels of all the valve groups, oil discharge L flow channels of all the valve groups, oil return T flow channels of all the valve groups and pilot oil Pst flow channels of all the valve groups are communicated with one another. According to the integrated energy-saving type load-sensitive multi-way valve, a split type structure is adopted, flexible expansion can be achieved according to different configuration requirements of a whole machine, the integrated energy-saving type load-sensitive multi-way valve comprises a dual valve, a triple valve, a quadruple valve and a stable module function valve, and meanwhile the stable module valve, a pilot oil source valve and a pilot hydraulic lock are integrated through the integrated design scheme; and the assembling performance and the maintainability are greatly improved. And meanwhile, various functional valve blocks such as overload oil supplementing valves configured for the tipping bucket unit and the standby unit, large-cavity hydraulic locks of the movable arm unit and the tipping bucket unit and a liquid filling safety valve of the stable module unit are arranged, so that various practical problems in installation application are solved.

The invention provides oxygen cabin equipment and a control system, and relates to the technical field of oxygen cabins, and the oxygen cabin equipment comprises a cabin body which is provided with an observation door; the oxygen cabin main machine device comprises an oxygen generator and a main machine, the oxygen generator is electrically connected with the main machine, and the oxygen generator supplies oxygen to the cabin body through an oxygen inlet valve; the manual safety valve is used for performing manual pressure relief on the cabin body; the automatic constant pressure safety valve is installed in the cabin body, the automatic constant pressure safety valve comprises an automatic pressure detection device and a full-automatic pressure reduction and deflation device, the automatic pressure detection device is used for monitoring the pressure in the cabin body in real time, the full-automatic pressure reduction and deflation device is used for deflating the interior of the cabin body, and the automatic constant pressure safety valve is electrically connected with the host machine. Double safety guarantee is achieved through the manual safety valve and the automatic constant-pressure safety valve. Potential safety hazards caused by the fact that an existing oxygen cabin is not provided with a safety device are effectively avoided, and the safety of the oxygen cabin in the using process is guaranteed.

The utility model relates to the technical field of waste liquid distillation, in particular to a waste liquid distillation retort which comprises a water container part and an auxiliary evaporation retort part, the water container part comprises a water container barrel and a water container lower sealing head, the water container lower sealing head is welded and fixed at the lower end of the water container barrel, and a transition conical barrel is welded and fixed at the upper end of the water container barrel. Water container supporting legs are fixedly arranged at the lower end of the outer wall of the water container barrel, the auxiliary evaporation tank part comprises an auxiliary evaporation tank barrel, an auxiliary evaporation tank upper sealing head and a steam pipe, a heating device is fixedly arranged on the outer wall of the water container barrel, the heating device comprises a heating pipe, a connecting flange and a heating connecting pipe, and a jacket treatment device is fixedly welded to one side of the water container barrel. The jacket treatment device comprises an integrated connecting pipe, a jacket liquid adding pipe, a pressure detection pipe, a jacket exhaust pipe and a safety valve connecting pipe, the integrated connecting pipe is welded and fixed to the outer wall of the water container barrel and communicated with the interior of the water container barrel, and the jacket liquid adding pipe, the pressure detection pipe, the jacket exhaust pipe and the safety valve connecting pipe are communicated to the upper end of the integrated connecting pipe.

A fail-safety valve unit is for a failure braking function of a pneumatic braking system for a vehicle. The fail-safety valve unit has a first and a second failure brake valve configured as monostable valves, and a main line which pneumatically connects a main port, which provides a first pressure, and a failure port. The first and second failure brake valves are connected pneumatically in series in the main line. The first and the second failure brake valves are controllable by different control units. The failure brake valves are open in an open position when not actuated such that the first pressure prevailing at the main port is provided as a failure brake pressure at the failure port such that, in a fault situation, in an electrical failure, and / or in a diagnostic situation, a failure braking operation is triggered via provision of the failure brake pressure at the failure port.

The invention relates to the technical field of machine learning, and particularly discloses a remote intelligent control method for a gas pipeline multi-branch safety valve based on an AI model, and the method comprises the following steps: obtaining original flow data and pipeline inner wall image data of a plurality of branches of a gas pipeline; inputting the original flow data and the pipeline inner wall image data into a pre-trained flow correction model to obtain corrected flow data of each branch; based on the corrected flow data, a control instruction of each branch safety valve is calculated through a control algorithm, and the control instruction comprises the specific adjustment amount of the opening degree of the safety valve; and sending the control instruction to a safety valve execution device of a corresponding branch through a communication network. The negative influence of the corrosion form on the stability of the flow field is effectively eliminated, precise control over gas conveying under the non-uniform flow field condition is achieved, and the safety of a gas pipeline system and the gas supply stability are guaranteed.

A safe valve can work stably in high and low temperature environment. It relates to the field of safe valve. The existing safe valve causes the steel ball to be stuck due to unreasonable structure, which seriously affects the normal operation of the lubricating oil system. The utility model discloses a safe movable shell, a nut, a sealing ring, a spring, a steel ball, a spring seat, an oil inlet and an oil outlet. The safe movable shell is provided with an oil inlet and an oil outlet respectively. The safe movable shell is fixedly connected with the nut. The sealing ring is arranged between the safe movable shell and the nut. The spring seat is arranged on the end of the nut close to the steel ball. The spring seat is connected with the safe movable shell and the nut respectively. The spring is arranged between the spring seat and the steel ball. The steel ball is assembled in the oil inlet of the safe movable shell through clearance fit and between the spring. The steel ball is pushed by the lubricating oil pressure. The steel ball pushes the spring to compress the spring. The opening and closing of the oil inlet by the steel ball are realized. The utility model is applied to the field of safe valve of lubricating oil system.

The pressure relief pipe comprises a first pressure relief pipe body and a second pressure relief pipe body, the end face of the outlet end of the first pressure relief pipe body is an inclined face, and the included angle between the end face of the outlet end of the first pressure relief pipe body and the axis of the first pressure relief pipe body is 45 degrees. The end face of the inlet end of the second pressure relief pipe is an inclined face, the included angle between the end face of the inlet end of the second pressure relief pipe and the axis of the second pressure relief pipe is 45 degrees, the outlet end of the first pressure relief pipe and the inlet end of the second pressure relief pipe are connected in a rotating fit mode, and a rotating positioning structure is arranged between the outlet end of the first pressure relief pipe and the inlet end of the second pressure relief pipe. The safety valve group comprises a ball valve, a check valve and a safety valve, a medium outlet of the ball valve is connected with a medium inlet of the check valve, one medium outlet of the check valve is connected with a medium inlet of the safety valve, and a pressure relief opening of the safety valve is connected with the pressure relief pipe. The pressure relief pipe can be converted between a straight pipe and a 90-degree right-angle bent pipe, and is suitable for installation and use of a safety valve group under the two conditions that an inlet of the water heater is horizontally and vertically downward.

The invention relates to a safety valve (1) for an electronic component, wherein the safety valve (1) is designed to be actuated and to achieve a pressure equalization relative to the atmospheric pressure when a predetermined or predeterminable critical internal pressure is reached or exceeded in a housing of the electronic component, wherein the safety valve (1) comprises a membrane (3) and an emergency degassing unit, wherein the emergency degassing unit is designed to pierce and / or cut the membrane (3) when the critical internal pressure is reached or exceeded, such that at least in the pierced and / or cut region of the membrane (3) the fluid permeability of the membrane (3) required and / or desired for the pressure equalization is increased accordingly. According to the invention, in particular, the emergency degassing unit comprises a piercing mechanism in the form of a tooth structure, the piercing mechanism having at least one piercing tooth (5), wherein, viewed in plan view from the at least one piercing tooth (5), the tooth comprises a trilobal, hexagonal, polygonal, star-shaped, quadrangular, X-shaped, K-shaped, C-shaped, Y-shaped or irregular geometric shape.

The utility model discloses a kind of sealing detection devices for safety valve production, belong to safety valve production technical field, its technical scheme main points include base, the top of base is provided with detection mechanism and fixed assembly, the detection mechanism includes support frame and sealing joint, the top of sealing joint is connected with external pipe, the left side of sealing joint is fixedly connected with pressure detector, the right side of sealing joint is fixedly connected with flow detector, solve the safety valve sealing detection device in existing detection process usually relies on artificial observation pressure gauge, artificial observation cannot capture subtle change in pressure in real time, detection precision is insufficient, and visual fatigue is easily generated, and existing detection device usually lacks the flow monitoring of leakage medium, only by pressure change judges sealing property, cannot accurately quantify leakage degree, it is not conducive to subsequent product quality analysis and improvement problem.

The utility model discloses a small caliber high pressure bellows safety valve relates to safety valve technical field, solves the failure problem such as small size valve stem bending easily, the valve piece includes the valve piece of the integral constitution and the recoil disc part, and the lower extreme of bellows is connected with the recoil disc part, the top side of valve piece forms the guide column upwards and extends, and the guide hole of guide bushing slides up and down with the guide column, and the top end of guide column extends to the top hole orifice position of guide hole, and the lower spring seat is equipped with below spring, and the bottom of valve rod is abutted with lower spring seat, and the bottom surface of lower spring seat has the first cone body of the downward convex inverted cone, and the top surface of guide column is equipped with the first taper groove of the first cone body adaptation, and the first cone body is formed positioning into the first taper groove. The overall structural strength and rigidity of valve rod system are strengthened, can bear the high load under the high pressure working condition of small caliber, and the length of guide cooperation is prolonged, and the perpendicularity and stability of valve piece in the movement in the opening and closing process are ensured.

The utility model relates to a storage battery safety valve assembling machine which comprises a first rotating disc, a second rotating disc, a third rotating disc and a fourth rotating disc. The first vibration disc is movably connected with the first rotary disc, and the first vibration disc conveys the vent cock body to the first rotary disc through a finger air cylinder; the clamp is movably connected with the first turntable and is used for mounting a rubber cap; the second vibration disc is movably connected with the first rotary disc, and the second vibration disc is provided with the vent cock front cover through a mechanical arm; the third vibration disc is movably connected with the first rotary disc, and the third vibration disc is provided with a gasket through a manipulator; the fourth vibration disc is movably connected with the fourth rotary disc, and the fourth vibration disc is used for installing a rear cover of the vent cock; the welding device is connected with the air tightness detector through a material belt, and the welding device is used for connecting the vent cock main body and the vent cock front cover. Only a small number of operators are needed, operation is easy, cost is low, and the yield is high.

This hydraulically driven, intelligent paddy field weeding and cultivation unit is an agricultural machine. The unit is equipped with a pressure-fluid source system consisting of a herbicide liquid tank, a pump assembly, a towerless liquid supply unit, a hydraulic sensor, a safety valve, and a hydraulic solenoid valve; a mechanical weeding and cultivation system consisting of flexible hoses, fixed pipe clamps, rigid pipes, a cylindrical shaft, a sleeve, fixed blades, moving blades, a barrel-type nozzle, and spiral blades; a positioning and adjustment mechanism consisting of a micro-screw linear module, a Π-shaped frame, a transverse track, a slider, a motor, cylindrical gears, a base plate, and a rack; a weed identification and positioning system consisting of a weed identification sensor; and an automatic control box assembly. This unit achieves an intelligent combination of hydraulically driven shearing and pulverizing mechanical weeding and chemical weeding through liquid flow delivery. It features a novel, unique, and reasonable structure, excellent weed control effect, low pesticide residue on crops, and minimal environmental pollution.

An oxygen supply pipeline for an oxygen pressure regulator, relating to the technical field of pressure reducing devices, includes a connecting cap, a connector, an oxygen supply hose, and an anti-disconnection device. The anti-disconnection device comprises a quick-connect socket, a locking plate, and a locking spring. The locking plate and locking spring cooperate to achieve automatic locking, preventing oxygen supply interruption. The connecting cap communicates with the low-pressure chamber of the oxygen pressure regulator via a safety valve. The safety valve includes an output housing, a valve core, a pressure adjusting screw, and a pressure adjusting spring, ensuring normal oxygen delivery and preventing safety accidents caused by excessive pressure. This utility model's oxygen supply pipeline has a simple structure, is easy to assemble, has low production costs, and can effectively improve the continuity, stability, and safety of oxygen supply, meeting the oxygen supply needs of different scenarios.

This utility model relates to the field of workpiece disassembly and assembly technology, specifically a disassembly device for a liquefied petroleum gas tanker safety valve. It includes a base plate, a second clamp fixedly connected to the upper surface of the base plate, a first clamp slidably connected to the upper surface of the base plate, a hydraulic jack fixedly connected to the upper surface of the base plate, and a positioning device on the upper surface of the base plate. The positioning device includes a first support plate slidably connected to the upper surface of the base plate, and a second support plate slidably connected to the upper surface of the base plate. A support plate is installed on the side of the first and second support plates that are close to each other. This utility model solves the problem that when disassembling a liquefied petroleum gas tanker safety valve, workers typically need to hold the safety valve to adjust its position and then use clamps to fix it, making the clamping of the safety valve difficult to complete independently and resulting in a complex disassembly process.

The invention provides a multifunctional modular combination valve for a spacecraft cold air pressurization system, which comprises a valve body and a part assembly mounted on the valve body, the part assembly comprises an electric explosion valve, a cushion valve, a pressure reducing valve, a safety valve and a pressure sensor, the valve body is a structural body with a plurality of cavities inside, an air inlet connector and an air outlet connector are formed in one side face of the valve body side by side, installation parts corresponding to the components are arranged outside the valve body, and the components are connected to the valve body in a sealed mode through threads. The structure is compact, the size is small, the structural layout of a pressurization system is simplified, the space envelope size is reduced, the assembly manufacturability is improved, the maintainability is improved, and the requirements for miniaturization, light weight and integration of a new-generation aircraft are met; the number of high-pressure pipelines and weld joints in a pressurization system is reduced, the weight of the system is reduced, and the sealing reliability and the mechanical environment resistance are improved.

The embodiment of the present disclosure provides a safety valve measuring device and method, the safety valve comprises a valve seat and a valve core ball matched with the valve seat, the measuring device comprises a measuring base, a measuring support sleeve and a measuring tool; the measuring support sleeve is arranged on the measuring base, the measuring support sleeve is provided with a first accommodating through hole facing the measuring base and a second accommodating through hole communicating with the first accommodating through hole and away from the measuring base; wherein the size of the first accommodating through hole is matched with the size of the valve core ball to accommodate the valve core ball, and the size of the second accommodating through hole is matched with the size of the valve seat to accommodate the valve seat; the measuring tool is used for size measurement. The embodiment of the present disclosure can obtain the matching size of the valve seat and the valve core ball through the cooperation between the arranged measuring base, the measuring support sleeve and the measuring tool.

The utility model discloses an energy-saving high-speed press hydraulic system, and belongs to the technical field of hydraulic systems. Aiming at the problems of low punching speed and high energy consumption of a traditional press hydraulic system, the system provides an energy-saving and efficient scheme integrating servo motor driving, a bag type energy accumulator and multi-stage valve control. The core of the hydraulic system comprises a vertical pushing and lifting oil cylinder, a hydraulic oil pump driven by a servo motor, a Y-shaped meso-position function electro-hydraulic reversing valve, an H-shaped electromagnetic reversing valve, a bag type energy accumulator and an electric valve, wherein the bag type energy accumulator and the electric valve are connected through a bridge type oil pipe. According to the system, energy is stored in the piston rod recovery stage through the energy accumulator, oil is supplied cooperatively with the hydraulic pump during stamping, and high-flow output under low power is achieved. In addition, the safety and the stability of system operation are guaranteed through multi-stage safety valves, pressure sensors and oil filtering / cooling devices on the main oil pipe and the branch oil pipes. According to the design, the punching speed is remarkably increased, energy consumption is reduced, and the device is suitable for intermittent high-speed punching scenes and has high efficiency and energy saving performance.

The utility model relates to the technical field of pipeline construction, in particular to a movable steam blowing device for installing a small pipeline, which comprises a movable trolley and a protective frame, a steam generator and a water tank are arranged on the movable trolley, a water supply pump is arranged on the water tank, a surge tank is arranged on the steam generator, and the surge tank is connected with the protective frame. A safety valve and a barometer are arranged on the surge tank, and a purging valve is arranged on one side of the surge tank; the steam generator comprises a heating cavity and a boiling cavity, the interior of the heating cavity is in an inverted concave shape, a preheating device is arranged at the bottom of the heating cavity, the boiling cavity is located on the upper side of the heating cavity, the boiling cavity and the heating cavity are communicated through a pipeline, and a temperature control assembly is arranged in the boiling cavity; the steam blowing small pipeline is adopted, the steam generator is provided with the heating cavity and the boiling cavity, water heating is separated, efficiency is improved, meanwhile, the pressure stabilizing tank is arranged, steam pressure fluctuation is reduced, pressure storage and pulse blowing can be achieved, and functionality and practicability of equipment are improved.

The application discloses a fuel step rapid injection device and injection method, and belongs to the field of aero-engine whole machine test, and aims at solving the problems of complex system, high cost, low injection precision and slow response. The device comprises a servo motor, a screw pair, an oil injector, first and second remote switch valves, first and second check valves and a safety valve. The servo motor drives the oil injector piston rod through the screw pair, the oil injector rod cavity is connected with the low-pressure fuel system through the second remote switch valve, and is connected with the engine fuel manifold through the first remote switch valve and the first check valve. A bypass connected with the fuel control device through the second check valve is arranged between the first check valve and the fuel manifold. In normal operation, the fuel control device supplies fuel to the fuel manifold through the second check valve; in step injection, the second remote switch valve is opened, the piston rod is extended to suck oil, then the piston rod is closed, the first remote switch valve is opened, and the piston rod is quickly retracted to inject fuel into the manifold. The application can be used in aero-engine surge test.