4595results about "Equalizing valves" patented technology

The invention discloses a pressure regulating solenoid valve, which relates to the technical field of solenoid valves, and comprises a valve body, the top of the valve body is provided with a valve seat, the valve seat is internally provided with a cavity, and through the arrangement of a first pressurizing hole, a second pressurizing hole, a flow dividing hole, a first flow dividing pipeline, a second flow dividing pipeline, a first pressurizing cavity and a second pressurizing cavity, the pressure regulating solenoid valve is formed. During use, when unstable high water pressure flows into the valve body, the high water pressure pushes the inner barrel upwards, then the inner barrel moves upwards to drive the flow dividing holes to move upwards, the flow dividing holes are driven to be sequentially in butt joint with the first pressurizing hole and the second pressurizing hole respectively, and then water is divided into the first flow dividing pipeline and the second flow dividing pipeline; then water flows into the first pressurizing cavity or the second pressurizing cavity, then water pressure is dispersed, then the water flowing into the first pressurizing cavity or the second pressurizing cavity downwards compresses the first spring to cause deformation shortening, and meanwhile, a stretched second spring is matched, so that when the water pressure upwards jacks the sleeve and the inner cylinder, buffering protection on the sleeve and the inner cylinder is enhanced.

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

The low-temperature safety valve comprises a valve body shell composed of an installation section, a pressure relief section and a reset section, a pressure relief pipe is fixedly installed on the side face of the pressure relief section, a transversely-arranged partition plate is fixedly installed in the pressure relief section, a heat preservation material is arranged in the pressure relief section, and a communicating hole is formed in the middle of the partition plate; a sealing block matched with the communicating hole is arranged in the pressure relief section, a connecting valve rod is fixedly installed on the upper surface of the sealing block, and a reset spring located on the inner side of the reset section is fixedly installed at the upper end of the connecting valve rod. According to the low-temperature safety valve with the leakage alarm function, the device is integrally installed in a pipeline system through a flange structure of the installation section, when the pressure reaches a set value, the sealing block is jacked up, the purpose of automatic pressure relief is achieved, and in the process, a gas sensor outside the pressure relief section is used for detecting surrounding gas, so that whether gas leakage exists at the joint or not is judged; and a wireless signal is transmitted to a computer so as to achieve the purpose of automatic alarm.

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.

The utility model belongs to the technical field of control valves, and discloses a novel valve seat sleeve of a large-pressure-difference regulating valve, which comprises a regulating valve seat body, an anti-erosion WC (Wolfram Carbide) valve seat sleeve, a compression valve seat sleeve nut and a positioning screw. On the basis of keeping the function of the original valve seat sleeve, the WC hard alloy valve seat sleeve is embedded on the valve seat body, so that the problems of valve seat cavitation, scouring and abrasion failure caused by the use environment of a control valve adjusting core component are solved under the condition of reducing the use amount, the service life of the core component is prolonged, and the service life of the core component is prolonged. And long-period, safe and reliable operation of core components in an application environment is ensured.

The invention discloses a pilot valve for hydraulic adjustment, and relates to the technical field of pilot valves, the pilot valve comprises a main valve sleeve assembly, an electromagnet assembly and a coil assembly which are assembled in sequence, the electromagnet assembly comprises a shell and a driving shaft, the driving shaft is assembled in the shell in a sliding mode, and the main valve sleeve assembly comprises an end cover, a main valve sleeve, a main valve element, a front valve element, a main spring seat and a pilot valve element. The main valve sleeve is fixedly installed in the shell, the end cover is in interference fit with the end, away from the shell, of the main valve sleeve, the main valve element is slidably assembled in the main valve sleeve, the front valve element is slidably assembled in the main valve element, the main spring seat is slidably assembled in the front valve element, and one end of the main spring seat movably penetrates through the front valve element to be in threaded connection with the end cover. A main elastic piece is assembled between the main spring seat and the front valve element, the pilot valve element is assembled between the main valve element and the driving shaft in a sliding mode and located on the moving path of the driving shaft, and a pilot elastic piece is assembled between the pilot valve element and the main valve element. Assembly is easy, machining difficulty is reduced, mass production is facilitated, and cost is reduced.

The invention discloses a vacuum breaker device with a self-adaptive variable stroke and an anti-backflow function, and relates to the technical field of valve switches, the vacuum breaker device comprises a valve body and an anti-siphon assembly, a flow channel, an inlet, an outlet and a supplementary air inlet are formed in the valve body, and the inlet, the outlet and the supplementary air inlet are communicated with the flow channel; the anti-siphon assembly comprises a first sealing core, a second sealing core and an elastic piece, and the first sealing core is connected with the second sealing core through the elastic piece, so that the vacuum breaker device has an initial state, a positive pressure state and a siphon state; in an initial state, the first sealing core blocks the air supplementing inlet, and the second sealing core blocks the inlet; in a positive pressure state, the first sealing core blocks the supplementary air inlet, and the inlet communicates with the outlet; in a siphon state, the second sealing core blocks the inlet, and the supplementary air inlet communicates with the outlet; according to the technical scheme provided by the invention, the structure of the vacuum breaker device can be simplified, and meanwhile, the self-adaptability of the vacuum breaker device under different working conditions is improved.

The invention belongs to the technical field of automobile shock absorber electromagnetic valves, and particularly relates to a hydraulic shock absorber electromagnetic valve for vehicle testing, which controls whether a liquid inlet hole is directly communicated with a main liquid cavity or not through an elastic valve plate, and controls whether the main liquid cavity is communicated with a liquid outlet hole or not through a pressurizing seat. The pressure of oil entering the liquid inlet must overcome the tension of the elastic valve block, the supporting force of the elastic supporting piece can push the elastic valve block and the pressurizing base to move in the direction away from the main valve body, then the oil can flow back to the shock absorber through the liquid outlet hole, and the resistance borne by the oil in the electromagnetic valve is increased. And large damping force is provided for the vibration damper. By arranging the pressurizing cavity, when the electromagnetic coil is powered on, the pilot valve element blocks the overflow hole, oil in the overflow hole applies pressure to the pressurizing base, the oil does not easily push away the pressurizing base and the elastic valve block in the direction away from the main valve body, and oil resistance is further increased. The electromagnetic valve consumes less electric energy, and the vehicle research and development test efficiency is improved.

The invention relates to the technical field of gate valve equipment, and discloses a meter-front copper gate valve with a magnetic lockable structure, which comprises a valve body which is used as a basic component of the whole device and is used for assembling and bearing all mechanisms and subordinate lower structural parts; the valve basic mechanism is arranged on the valve body and used for being matched with other structural parts to execute basic operation treatment of the valve; and the locking protection mechanism is arranged at the upper part of the valve body. By adding and arranging an extreme protection mechanism, under the extreme working condition, a thermosensitive alloy sleeve of the mechanism expands in a high-temperature environment to push a locking pin rod to be inserted into a valve rod locking hole, a valve rod is mechanically locked, and fluid leakage caused by high-temperature damage of the valve under the extreme conditions such as a fire disaster is prevented; after the temperature is reduced, the pin rod is automatically reset, locking is relieved, follow-up normal operation is not affected, the valve body can be actively protected under the extreme working condition through the treatment mode, and the accident risk is prevented from being increased due to valve failure.

The invention relates to the technical field of valve bodies, and provides a pressure reducing valve with emergency shutoff and backflow prevention functions, which comprises a main valve body, a main valve membrane and a valve core assembly, the main valve body comprises a valve cavity with a water inlet end and a water outlet end, and the main valve membrane is arranged in the valve cavity and divides the valve cavity into a control cavity and an overflowing cavity; the pressure reducing valve is in a pressure reducing dynamic adjusting state, when the pressure reducing valve is in the pressure reducing dynamic adjusting state, the shut-off reversing valve changes the position so as to close the pressure reducing pilot valve to be communicated with the water outlet end, and the pressure reducing valve is switched to an emergency shut-off state so as to be closed. When the pressure reducing valve is in the pressure reducing dynamic adjusting state, the anti-backflow reversing valve changes the position to close communication between the water inlet end and the control cavity and enable the water outlet end to communicate with the control cavity, and the pressure reducing valve is switched to be in the anti-backflow state so as to be closed. The problem that in the prior art, downstream leakage or backflow of a traditional pressure reducing valve cannot be blocked in time is 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 invention relates to the technical field of balance valves, and discloses a load compensation balance valve which comprises a balance valve body and an adjusting nut, a locking cap is in threaded connection with the outer arc surface of the adjusting nut, the right side of the locking cap is in contact with a main valve element spring, and the end, away from the locking cap, of the main valve element spring is in contact with a tip cone. The function of a one-way valve of one balance valve element assembly is canceled, so that oil inlet from a V port to a C port depends on the pressure of a control oil port and generates driving pressure through a throttling network composed of a specific throttling hole, the one-way valve and a bypass throttling hole, and the other balance valve element assembly obtains the driving pressure equal to the pressure of the control oil port through an independent throttling hole. A pressure difference is formed to realize sequential opening of the two assemblies; the linkage logic inhibits the jitter of the multiple feedback system under the negative load, stabilizes the falling speed of the arm support, and avoids the risk of overturning of the whole machine caused by the dynamic load.

The utility model relates to a safety valve. A safety valve comprises a valve body, a water inlet is formed in the lower end of the valve body, and a pressure relief opening is formed in the right end of the valve body. A hollow diaphragm is arranged in the valve body, a piston is arranged in the diaphragm, a spring is arranged in the piston, a spring support is arranged in the spring, and a valve bonnet is arranged at the upper end of the spring support. Under the action of the spring, the diaphragm can move up and down, so that the water inlet is closed and opened. An annular boss is arranged at the bottom in the valve body, and the outer wall of the upper end of the annular boss is designed to be an annular conical face with the small upper portion and the large lower portion. According to the structure, when the safety valve is opened, the gap between the annular boss and the diaphragm can be increased, and the flow of water flowing through is remarkably increased, so that the pressure relief capacity of the safety valve is improved, and the safety of a pipeline is guaranteed. The safety valve is optimized in structure and reliable in performance, and solves the problems that in the prior art, pressure relief performance is insufficient, installation and adjustment are inconvenient, and sealing performance is poor.

The invention discloses high-pressure fuel gas pressure regulating equipment in the technical field of fuel gas pressure regulating equipment, which comprises a valve body, and a valve rod, a reset spring and a gas inlet box which are arranged on the valve body, a valve seat and a diaphragm are arranged on the valve rod, the gas inlet box is communicated with a gas outlet of the valve body through a guide pipe, and a detection assembly is arranged in the gas inlet box; the detection assembly comprises an air pressure detection piece and a displacement detection piece, and a warning indicator is arranged on the air inlet box and used for giving an alarm when the air pressure detection piece detects that the air pressure below an inner cavity of the air inlet box is lower than a threshold value and the displacement detection piece does not detect that the valve rod moves. The high-pressure gas pressure regulating equipment is detected through the detection assembly, when the air pressure detection piece detects that the air pressure below the inner cavity of the gas inlet box is lower than a threshold value and the displacement detection piece does not detect that the valve rod moves, the warning indicator gives an alarm to remind a user, so that problems can be found in time, further deterioration of the faults is avoided, and the service life of the user is prolonged. And the probability of potential safety hazards is reduced.

The safety-level high-precision air volume control valve comprises a valve body assembly, the valve body assembly comprises a frame, blades, a rotating shaft and a driving structure, the frame is hollow to form a cavity, openings are formed in the two sides of the cavity in the first direction respectively, the rotating shaft extends in the second direction, the blades are connected into the cavity through the rotating shaft, and the driving structure is in driving connection with the rotating shaft; the second direction is perpendicular to the first direction; the flow measuring assembly comprises a flow measuring frame and a flow measuring element, the flow measuring frame is hollow to form a flow measuring cavity, the flow measuring frame is connected with one side face of the frame, the flow measuring cavity is communicated with the cavity, the flow measuring element is arranged in the flow measuring cavity and used for obtaining airflow parameter information of the flow measuring cavity, and the flow measuring element is electrically connected with the driving structure; the driving structure is configured to control the rotating shaft to drive the blades to rotate according to airflow parameter information acquired by the flow measuring element. High-precision control and adjustment of the air volume can be achieved.

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.

Disclosed in the present disclosure is a multi-position controlled airway valve, including a venting control member; a valve body, provided with a fluid channel and a venting channel, in which the venting control member is provided on the venting channel; a valve core assembly, mounted in the fluid channel, controlling the fluid channel to switch between a connected state and a sealed state, wherein the valve core assembly in a filling mode controls the fluid channel to be in the connected state and abuts against the venting control member so as to keep the venting channel to be in a ventilated state. Disclosed is also a refilling device applied with the multi-position controlled airway valve and a refilling system applied with the refilling device, so as to achieve the objective of removing air and residual gases promptly when refilling with new fuels.

The utility model discloses a double-adjustment check valve, which belongs to the technical field of check valves, and comprises a valve body, a check assembly and an adjustment assembly, two ends of the valve body are respectively provided with a water inlet channel and a water outlet channel, a valve hole is arranged in the valve body and between the water inlet channel and the water outlet channel, the top of the valve body is fixedly provided with a valve cover, and the valve cover is fixedly provided with a valve core. The non-return assembly comprises a limiting block installed in the valve deck in a sliding mode, a spring is fixedly connected to the bottom of the limiting block, a valve element is fixedly connected to the lower end of the spring, the adjusting assembly comprises a supporting cylinder fixedly connected to the valve deck, and the inner top wall of the supporting cylinder is in threaded connection with a screw rod. The screw rod is inserted into the limiting block and is in threaded connection with the limiting block; through the arrangement of the adjusting assembly, the initial compression amount of the spring can be controlled, the pressure needed for overcoming the elastic force of the spring can also change, and the opening water pressure corresponding to the check valve can be adjusted so as to adapt to various requirements under different working conditions.

According to the overflow valve with the pressure relief function, a limiting structure is arranged in an overflow pressure adjusting cavity, by limiting the moving distance of an overflow piston, when the pressure at the front end of a pipeline is too large, the pressure relief piston is pushed to move, and then a pressure relief valve is opened; according to the pressure relief valve, the overflow piston is arranged in the pressure relief channel, so that overlarge gas pressure passes through the pressure relief channel, the pressure relief valve port and the cavity between the pressure relief piston and the overflow piston and then is exhausted through the pressure relief exhaust port, the gas pressure at the front end of a pipeline is reduced, that is, overlarge pressure in the corresponding pipeline is reduced, and the problem of gas explosion of the pipeline is avoided.

The utility model relates to the technical field of lithium batteries, in particular to an anti-explosion pressure release valve of a lithium battery. Comprising a cylindrical valve body, a sealing groove is formed in the inner wall of the valve body, a sealing ring is arranged in the sealing groove, an inserting groove penetrating through the two sides of the valve body is formed in one end of the valve body, a piston is inserted into the valve body and is in sliding connection with the sealing ring, a protruding column is arranged at one end of the piston, and the diameter of the protruding column is smaller than that of the piston. Elastic pieces are arranged on the two sides of the end, away from the piston, of the protruding column, the elastic pieces are inserted into the inserting grooves, and a blocking plate is arranged on the inner side of the end, provided with the inserting grooves, of the valve body. Whether the internal pressure of the battery is abnormal or not can be judged by observing whether the piston moves outwards or not.

Disclosed are an oilproof assembly, an oilproof vent valve, and a device with an oil tank. The oilproof assembly includes: a valve body, wherein a cavity is formed in the middle, the valve body includes a first end and a second end; a first filter element arranged in the cavity at the first end; a limiting part arranged in the cavity at the second end; and an elastic part arranged between the first filter element and the limiting part and configured to apply a thrust to the filter element after the first filter element absorbs oil to swell, so that at least part of oil absorbed in the first filter element can be extruded by the thrust of the elastic part. According to the oilproof assembly, the oilproof vent valve, and the device with the oil tank, the maintenance cost can be reduced, and the service life can be prolonged.

The pressure release valve comprises a shell and a fixing sleeve arranged on the shell, an installation cavity is formed in the shell, an electromagnetic coil assembly is arranged in the installation cavity, the magnetic isolation sleeve is inserted in the installation cavity, the magnetic isolation sleeve is connected between the shell and the fixing sleeve in an abutting mode and isolates the installation cavity, and the electromagnetic coil assembly is arranged in the magnetic isolation sleeve. A movable valve element is arranged on the magnetism isolating sleeve in a sliding mode, and the end of the movable valve element is connected with a sealing piece.

The utility model relates to a water supply pipeline quality detection device, and relates to the technical field of pipeline quality detection. According to the device for detecting the quality of the water supply pipeline, after the water conveying pipe, the first connecting pipe, the circulating pump, the water supply pipeline, the connecting bin, the water outlet pipe and the water return pipe are sequentially communicated, a water circulation loop can be formed for detecting the water supply pipeline; an adjusting mechanism limiting spring is arranged in the connecting bin, and water is continuously injected into the water supply pipeline section in cooperation with a circulating pump, so that the water pressure in the water supply pipeline section is increased till water can pass through the connecting bin, and at the moment, the water pressure in the water supply pipeline section is stable; the quality of the water supply pipeline under the conditions of stable water pressure and water flowing can be detected, and normal operation of a water supply system is effectively guaranteed.

A breakaway valve for a cryogenic fluid tank includes a tank-side valve and a nozzle-side valve. The tank-side valve is connected to and forms a first vacuum-insulation layer with a first jacketed hose. The first jacket support includes first bellows configured to reduce heat transfer with the first vacuum-insulation layer and one or more first bellow supports that include first teeth inserted between and engaging the first bellows to provide structural support to the first bellows. The nozzle-side valve is connected to and forms a second vacuum-insulation layer with a second jacketed hose. The second jacket support includes second bellows configured to reduce heat transfer with the second vacuum-insulation layer and one or more second bellow supports that include second teeth inserted between and engaging the second bellows to provide structural support to the second bellows.

The invention discloses a single-action pressure reduction diaphragm type pressure flow amplifier in the field of industrial flow control. The single-action pressure reduction diaphragm type pressure flow amplifier comprises a machine body, a valve core, a flexible diaphragm, an exhaust assembly, a large pressure reduction device and a small pressure reduction device. An adjusting cavity, an air inlet cavity, an air outlet cavity, an air inlet channel and an air outlet channel are formed in the machine body, the air inlet channel is communicated with the air inlet cavity, the air outlet cavity is communicated with the air outlet channel, the valve core is arranged between the air inlet cavity and the air outlet cavity, the valve core is pushed through the flexible diaphragm and the exhaust assembly, and the compressed air flow and pressure intensity between the air inlet cavity and the air outlet cavity can be adjusted; when the pressure intensity of the adjusted air is relatively low, the small pressure reducing device is used for reducing pressure; and when the pressure intensity is high, the large pressure reducing device is used for reducing pressure. The diaphragm structure design is adopted, the flow and the pressure intensity of compressed air are adjusted through reciprocating motion of the flexible diaphragm, the pressure intensity of the adjusted air is reduced through the two pressure reducing devices, and the diaphragm structure can be better suitable for application scenes where the pressure intensity of the adjusted air is high.

The invention provides an anti-freezing and anti-crystallization hydraulic breather valve and a control method thereof, and belongs to the technical field of breather valves, the anti-freezing and anti-crystallization hydraulic breather valve comprises a valve body and an upper valve box, the valve body is internally provided with a main valve cavity, the main valve cavity is internally provided with an inner valve body, the inner valve body is internally provided with a negative pressure valve assembly, and the negative pressure valve assembly comprises a negative pressure valve seat, a negative pressure diaphragm, a negative pressure valve disc and a negative pressure valve rod; an upper diaphragm is arranged between the upper valve box and the valve body, a valve seat part is arranged at the upper end of the valve body, an anti-freezing solution is arranged in the upper valve box, and the upper diaphragm and the valve seat part are sealed under the gravity of the anti-freezing solution; through the synergistic effect of anti-freezing solution gravity sealing and hydraulic self-balancing design, compared with a traditional breather valve which depends on elastic elements such as a spring to maintain sealing pressure, the technical problems of sealing failure, complex mechanical structure, dynamic response lag and the like in a low-temperature environment are solved; high reliability, long service life and rapid pressure response of the breather valve are achieved, and the breather valve is particularly suitable for the extremely low-temperature working condition.

The invention belongs to the technical field of ball valves, and particularly relates to an overpressure emergency self-pressure-relief ball valve which comprises a ball valve shell, a driving assembly is installed at the top end of the ball valve shell, a valve element is rotationally connected into the ball valve shell, the top end of the valve element is fixedly connected with the end of a rotating shaft of the driving assembly, and a liquid outlet is formed in one side of the ball valve shell. A butt joint shell is installed on the side, away from the liquid outlet, of the ball valve shell, a first pressure relief shell is fixed to the top end of the butt joint shell, a first spring is arranged in the first pressure relief shell, a first pressure relief block is fixed to the bottom end of the first spring, and a liquid inlet pipe is fixed to one end of the first pressure relief shell; by screwing the stud, the push block can be driven to extrude the first spring, meanwhile, under the limiting effect of the limiting block and the guide groove on the first pressure relief block, the pushing pressure of the first pressure relief block can be adjusted, and the first spring can be adjusted to the corresponding pressure according to the use scene.

The utility model belongs to the technical field of pressure and flow stabilizing devices, and particularly relates to a gas pressure and flow stabilizing device which comprises a valve body, a pressure regulating valve module, a gas flow stabilizing valve module and a flow regulating valve module. A pressure stabilizing structure cavity and a flow stabilizing structure cavity are formed in the valve body, and the pressure regulating valve module is arranged in the pressure stabilizing structure cavity and divides the interior of the pressure stabilizing structure cavity into a lower air inlet cavity and an upper pressure stabilizing cavity. The airflow stabilizing valve module is arranged in the flow stabilizing structure cavity; the flow regulating valve module is arranged on the three-way connecting pipeline and is used for regulating the flow of the gas conveyed to the flow stabilizing structure cavity; the pressure regulating valve module is linked with the air flow stabilizing valve module, so that the demand quantity of air during welding can be reduced to the minimum through automatic regulation of air pressure and air flow in the pressure and flow stabilizing device under different pressures, and meanwhile, the requirement of air consumption during welding can be met.

The invention provides a high-pressure cavitation valve which comprises a valve body, a valve core, a valve core, a valve core, a valve core, a valve core, a valve core, a valve core and a valve core, and is characterized in that the valve body is internally provided with a mounting cavity and is provided with a flow inlet channel and a flow outlet channel; the valve cover is arranged at the upper part of the valve body and used for covering the upper side of the mounting cavity; the valve assembly comprises a valve element, a valve rod, a mounting seat, a valve seat and a throttling module, the mounting seat, the throttling module and the valve seat are sequentially arranged from top to bottom, a movable cavity of the valve element is formed in the mounting seat and the throttling module, the valve element is mounted in the movable cavity and used for acting up and down to be matched with the valve seat to open and close the valve, and the valve rod penetrates through the valve cover and then is connected with the valve element; the throttling module at least comprises two round throttling laminations which are arranged in an up-down overlapped mode, a center hole is formed in the center of each throttling lamination in a penetrating mode, a labyrinth flow channel used for reducing pressure and noise of media is formed between every two adjacent throttling laminations, and the labyrinth flow channels are not communicated with one another at the overlapped portions of the throttling laminations. The throttling module in the scheme can effectively play roles of throttling, pressure reduction and the like.