A pressure-adjustable quick-on / off valve

Abstract

The present invention relates to the field of valve technology, and more specifically, to a pressure-adjustable quick-on / off valve. The valve block comprises a valve block, an axially-acting valve assembly, and a pressure-control valve assembly. The valve block is used for fluid diversion and includes a fluid inlet and a plurality of fluid outlets. The axially-acting valve assembly is sealedly connected to the fluid outlet of the valve block and is used to control the on / off of the fluid and to unload the rear end of the axially-acting valve assembly. The pressure-control valve assembly is sealedly connected to another fluid outlet of the valve block and is used to unload the front end of the axially-acting valve assembly and regulate the pressure of the fluid flowing into the axially-acting valve assembly. The axially-acting valve assembly includes a solenoid valve, which drives the on / off state by controlling the flow of high-pressure gas into the inner cavity of the axially-acting valve assembly. The pressure-control valve assembly includes a pressure-regulating valve, the outlet of the solenoid valve is also connected to the inlet of the pressure-regulating valve via an air pipe. The outlet of the pressure-regulating valve is in communication with the inner cavity of the pressure-control valve assembly to control the on / off state of the pressure-control valve assembly. The present invention effectively increases the scope of use and service life, while effectively preventing damage to the working pump.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and in particular to a pressure-adjustable quick on-off valve. Background Art

[0002] With the increase in production capacity and production efficiency, the requirements for time are becoming more and more stringent. In order to improve efficiency, uninterrupted production of products has become particularly important. At the same time, the requirements for fluid supply are also becoming higher and higher. Stable and accurate output, rapid fluid access, and unloading of high-pressure fluids at the front and back ends of the valve have become particularly important.

[0003] Currently, the products on the market have the following defects. First, the independent pressure control valve has no fluid on-off function, and the conventional pressure control valve is easy to clog; second, the conventional valve with quick on-off and unloading functions cannot have the specific pressure regulation function at the same time; thus, the processing rhythm is affected and the product production efficiency and quality are reduced.

[0004] During the production process, the switching of valves causes high-pressure fluids, especially liquid fluids, to remain in the pipeline between the valve and the processing end. These fluids often cannot be unloaded at the same time, affecting the replacement of processing tools at the processing end, affecting production efficiency, and easily causing damage to processing equipment. Summary of the Invention

[0005] The technical problem solved by the present invention is to provide an on-off valve which can effectively unload the front and rear ends of the valve and has the advantages of fast on-off and adjustable pressure.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A pressure-adjustable quick on-off valve, comprising a valve block, an axially-acting valve assembly and a pressure control valve assembly; the valve block is used for fluid diversion, comprising a fluid inlet and a plurality of fluid outlets, the axially-acting valve assembly is sealedly connected to the fluid outlet of the valve block, and is used to control the on-off of the fluid, and to unload the rear end of the axially-acting valve assembly, the axially-acting valve assembly adopts a two-way axially-acting valve assembly or a three-way axially-acting valve assembly, the pressure control valve assembly is sealedly connected to another fluid outlet of the valve block, and is used to unload the front end of the axially-acting valve assembly and regulate the fluid pressure flowing into the axially-acting valve assembly; the axially-acting valve assembly comprises a solenoid valve, which drives its on-off by controlling the flow of high-pressure gas into the inner cavity of the axially-acting valve assembly, and the pressure control valve assembly comprises a pressure regulating valve, the outlet of the solenoid valve is also connected to the inlet of the pressure regulating valve through an air pipe, and the outlet of the pressure regulating valve is connected to the inner cavity of the pressure control valve assembly to control the on-off of the pressure control valve assembly.

[0008] Furthermore, the pressure control valve assembly includes a pressure valve cylinder, a pressure valve end cover, a pressure valve piston rod, a pressure valve spring, a pressure valve piston, a pressure valve sealing assembly, a pressure valve sleeve, a pressure valve sealing seat and the pressure regulating valve; the pressure valve end cover is arranged at the rear end of the pressure valve cylinder and is statically sealed therewith through a sealing ring, the pressure valve sleeve is installed at the front end of the pressure valve cylinder, the pressure valve sealing seat is arranged at the front end of the pressure valve sleeve and is statically sealed therewith; the pressure valve piston rod, the pressure valve spring and the pressure valve piston are arranged in the inner cavity of the pressure valve cylinder, the pressure valve piston is sleeved on the pressure valve piston rod and is fixedly connected therewith, and the pressure regulating valve The pressure valve spring is arranged between the pressure valve piston and the pressure valve end cover. The front part of the pressure valve piston rod is dynamically sealed with the inner side of the pressure valve bushing through the second dynamic sealing ring, and the rear part is dynamically sealed with the inner side of the pressure valve end cover through the first pressure valve sealing ring and the second pressure valve sealing ring. The pressure valve piston is installed with a first dynamic sealing ring and is dynamically sealed with the inner cavity of the pressure valve cylinder through the first dynamic sealing ring. The pressure valve sealing assembly is fixed to the front end of the pressure valve piston rod, and the pressure valve sealing assembly cooperates with the pressure valve sealing seat to realize the on and off of the pressure valve control assembly; the pressure regulating valve is fixedly connected to the pressure valve cylinder through the pressure valve adapter plate.

[0009] Furthermore, a sealing ring is provided between the pressure valve bushing and the pressure valve sealing seat, and is sealedly connected to the inner side of the fluid outlet of the valve block through the sealing ring.

[0010] Furthermore, the axial valve assembly includes an axial valve cylinder, an axial valve bushing assembly, an axial valve sealing assembly, an axial valve piston, an axial valve spring, an axial valve piston rod, an axial valve end cover and the solenoid valve; the front and rear ends of the axial valve cylinder are both provided with the axial valve bushing assembly to form a front axial valve bushing assembly and a rear axial valve bushing assembly, the axial valve bushing assembly is statically sealed with the axial valve cylinder through a sealing ring, the front end of the front axial valve bushing assembly is provided with the axial valve sealing assembly, the rear axial valve bushing is statically sealed with the axial valve end cover through a sealing ring, the inner cavity of the axial valve cylinder is provided with the axial valve piston, the axial valve The spring and the axial valve piston rod, the axial valve piston is sleeved on the axial valve piston rod and fixedly connected thereto, the axial valve spring is arranged between the axial valve sleeve and the rear axial valve sleeve assembly, the axial valve piston rod is dynamically sealed with the inner side of the axial valve sleeve assembly through the first axial valve sealing ring and the second axial valve sealing ring, a dynamic sealing ring is installed on the axial valve piston, and is dynamically sealed with the inner cavity of the axial valve cylinder body through the dynamic sealing ring, the axial valve sealing assembly cooperates with the axial valve piston rod to realize the on and off of the axial valve assembly; the solenoid valve is fixedly connected to the axial valve cylinder body through the axial valve adapter plate.

[0011] Furthermore, a support ring is provided inside the shaft-actuated valve bushing assembly, and the support ring is dynamically sealed to the shaft-actuated valve piston rod.

[0012] Furthermore, an axial-acting valve C-port end cover is provided between the rear axial-acting valve bushing assembly at the rear end of the axial-acting valve assembly and the axial-acting valve end cover, the inlet of the axial-acting valve C-port end cover is statically sealed with the rear axial-acting valve bushing assembly through a sealing ring, the first outlet of the axial-acting valve C-port end cover is fixedly connected to the axial-acting valve end cover, and the first outlet and the inner side of the axial-acting valve end cover are provided with an axial-acting valve sealing seat, and the axial-acting valve sealing seat is statically sealed with the axial-acting valve C-port end cover and the axial-acting valve end cover through a sealing ring respectively; the axial-acting valve sealing seat is provided with flow holes at front and back, the front end of the flow hole is connected with the inlet and the second outlet of the axial-acting valve C-port end cover, and the rear end thereof is connected with the axial-acting valve end cover, the front end of the axial-acting valve sealing seat is installed with a sealing ring, and the axial-acting valve piston rod cooperates with the axial-acting valve sealing seat to realize unloading of the rear end of the axial-acting valve assembly.

[0013] Furthermore, an axially-actuated valve connecting plate is provided on the outer side of the axially-actuated valve end cover.

[0014] Furthermore, a sealing ring is installed on the outer side of the front axle dynamic valve bushing, and is sealed and connected to the inner side of the fluid outlet of the valve block through the sealing ring.

[0015] Furthermore, the pressure regulating valve is a manual pressure regulating valve or an electric pressure regulating valve.

[0016] The beneficial effects of the present invention are:

[0017] The present invention is a pressure-adjustable on-off valve for fluid control engineering. It integrates an on-off axial valve assembly and a pressure control valve assembly. It has a wide range of applications and can effectively output stable pressure. The two-way axial valve assembly quickly controls the flow of fluids. The pressure control valve assembly combines pressure regulation and drainage functions, achieving continuous water flow and rapid on-off switching. The two-way axial valve assembly can also be improved to a three-way axial valve assembly to quickly control the flow of fluids. High-pressure fluids at the rear end of the valve can be unloaded using the C port. The fluid and pipeline are coaxially mounted, allowing for rapid switching. This effectively extends the range of use and service life, while effectively preventing damage to the working pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of Example 1 of the present invention;

[0019] Figure 2 This is a structural diagram of Example 2 of the present invention;

[0020] Figure 3 for Figure 1 The structure diagram marked as 3;

[0021] Figure 4 for Figure 1 The structure diagram marked as 2;

[0022] Figure 5 for Figure 4 An enlarged structural diagram marked as 202;

[0023] Figure 6 for Figure 2 The structure diagram marked as 2;

[0024] The following are marked in the figure:

[0025] 1. Valve block, 2. Axial valve assembly, 3. Pressure control valve assembly, 4. Air pipe; 201. Axial valve cylinder, 202. Axial valve bushing assembly, 203. Axial valve sealing assembly, 204. Axial valve piston, 205. Axial valve spring, 206. Axial valve piston rod, 207. Axial valve end cover, 208. Axial valve connecting plate, 209. Axial valve adapter plate, 210. Solenoid valve, 211. Axial valve C-port end cover, 212. Axial valve sealing seat; 301. Pressure valve cylinder, 302. Pressure valve end cover, 303. Pressure valve piston rod, 304. Pressure valve spring , 305, pressure valve piston, 306, pressure valve sealing assembly, 307, pressure valve bushing, 308, pressure valve sealing seat, 309, pressure valve adapter plate, 310, pressure regulating valve; 2011, axial valve left chamber, 2012, axial valve right chamber, 2021, first axial valve sealing ring, 2022, second axial valve sealing ring, 2023, support ring, 3011, pressure valve upper chamber, 3012, pressure valve lower chamber, 3021, first pressure valve sealing ring, 3022, second pressure valve sealing ring, 3051, first dynamic sealing ring, 3071, second dynamic sealing ring. DETAILED DESCRIPTION

[0026] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] It should be noted that when an element is referred to as being “fixed to” another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] A pressure-adjustable quick-on / off valve, such as Figure 1-6 As shown, the valve block 1 includes a valve block 1, an axial valve assembly 2, and a pressure control valve assembly 3. The valve block 1 is used for fluid diversion and includes a fluid inlet and several fluid outlets. The axial valve assembly 2 is sealed with the fluid outlet of the valve block 1 to control the flow of fluid and unload the rear end of the axial valve assembly 2. The axial valve assembly 2 adopts a two-way axial valve assembly or a three-way axial valve assembly. The pressure control valve assembly 3 is sealed with the other fluid outlet of the valve block 1 to unload the front end of the axial valve assembly 2 and regulate the pressure of the fluid flowing into the axial valve assembly 2. The axial valve assembly 2 includes a solenoid valve, which controls the flow of high-pressure gas into the inner cavity of the axial valve assembly to drive its on and off. The pressure control valve assembly 3 includes a pressure regulating valve. The outlet of the solenoid valve is also connected to the inlet of the pressure regulating valve via an air pipe 4. The outlet of the pressure regulating valve is in communication with the inner cavity of the pressure control valve assembly 3 to control the flow of pressure control valve assembly 3.

[0030] like Figure 3As shown, the pressure control valve assembly 3 includes a pressure valve cylinder 301, a pressure valve end cover 302, a pressure valve piston rod 303, a pressure valve spring 304, a pressure valve piston 305, a pressure valve sealing assembly 306, a pressure valve sleeve 307, a pressure valve sealing seat 308 and a pressure regulating valve 310. The pressure valve end cover 302 is arranged at the rear end of the pressure valve cylinder 301 and is statically sealed therewith through a sealing ring. The pressure valve sleeve 307 is installed at the front end of the pressure valve cylinder 301. The pressure valve sealing seat 308 is arranged at the front end of the pressure valve sleeve 307 and is statically sealed therewith. The pressure valve piston rod 303, the pressure valve spring 304 and the pressure valve piston 305 are arranged in the inner cavity of the pressure valve cylinder 301. The pressure valve piston 305 is sleeved on the pressure valve piston rod 303 and fixedly connected therewith. The pressure valve piston and the pressure valve piston rod 303 are fixedly connected by shrink fitting. The pressure valve spring 304 is arranged between the pressure valve piston 305 and the pressure valve end cover 302. The front part of the pressure valve piston rod 303 is dynamically sealed to the inner side of the pressure valve sleeve 307 through the second dynamic sealing ring 3071, and the rear part is dynamically sealed to the inner side of the pressure valve end cover 302 through the first pressure valve sealing ring 3021 and the second pressure valve sealing ring 3022. A first dynamic seal ring 3051 is mounted on the pressure valve piston 305, which is dynamically sealed to the interior of the pressure valve cylinder 301 via the first dynamic seal ring 3051. A pressure valve seal assembly 306 is fixed to the front end of the pressure valve piston rod 303. The pressure valve seal assembly 306 cooperates with the pressure valve seal seat 308 to enable and disable the pressure valve control assembly 3. The pressure regulating valve 310 is fixedly connected to the pressure valve cylinder 301 via a pressure valve adapter plate 309. A seal ring is provided between the pressure valve bushing 307 and the pressure valve seal seat 308, which is then sealed to the inside of the fluid outlet of the valve block 1.

[0031] The first pressure valve sealing ring 3021 and the second pressure valve sealing ring 3022 are used to seal gas and liquid respectively, and effectively prevent gas and liquid leakage through the two-stage linkage. The pressure valve piston 305 divides the pressure valve cylinder 301 into the pressure valve upper chamber 3011 and the pressure valve lower chamber 3012 through the first dynamic sealing ring 3051. In the present invention, the pressure valve lower chamber 3012 is connected to the outlet of the pressure regulating valve 310 through the pressure valve adapter plate 309. The pressure regulating valve 310 drives the pressure valve piston 305 to move up and down by controlling the pressure entering the pressure valve lower chamber 3012. If Figure 3As shown, when the pressure is increased, the pressure in the lower chamber 3012 of the pressure valve increases, driving the pressure valve piston 305 to move upward, and the pressure valve piston 305 drives the pressure valve piston rod 303 to move upward, and the pressure valve sealing assembly 306 at the front end (upper end) of the pressure valve piston rod 303 cooperates with the pressure valve sealing seat 308 to seal. When the pressure is reduced, the pressure valve spring is reset, driving the pressure valve piston 305 to move downward, and the pressure valve piston 305 drives the pressure valve piston rod 303 to move downward, and the pressure valve sealing assembly and the pressure valve sealing seat 308 are separated and opened. The pressure in the lower chamber 3012 of the pressure valve is controlled by the pressure regulating valve 310 to control the opening and closing of the pressure valve sealing assembly 306 and the pressure valve sealing seat 308. The pressure valve sealing seat 308 is provided with a hole. The pressure valve sealing assembly 306 includes a sealing ring, which is fixed to the front end (upper end) of the pressure valve piston rod 303 by bolts. The pressure valve piston rod 303 is also provided with flow holes at the top and bottom. When the pressure valve sealing assembly 306 and the pressure valve sealing seat 308 are opened, high-pressure fluid flows in from the pressure valve sealing seat 308, flows through the pressure valve piston rod 303, and flows out from the pressure valve end cover 302.

[0032] Example 1:

[0033] like Figure 4 、 5 As shown, the axial valve assembly 2 adopts a two-way axial valve assembly, including an axial valve cylinder body 201, an axial valve bushing assembly 202, an axial valve sealing assembly 203, an axial valve piston 204, an axial valve spring 205, an axial valve piston rod 206, an axial valve end cover 207 and a solenoid valve 210. The front and rear ends of the axial valve cylinder 201 are both provided with axial valve bushing assemblies 202 to form a front axial valve bushing assembly and a rear axial valve bushing assembly. The axial valve bushing assembly 202 is statically sealed with the axial valve cylinder 201 through a sealing ring. The front end of the front axial valve bushing assembly is provided with an axial valve sealing assembly 203, and the rear axial valve bushing is statically sealed with the axial valve end cover 207 through a sealing ring. The inner cavity of the axial valve cylinder 201 is provided with an axial valve piston 204, an axial valve spring 205 and an axial valve piston rod 206. The axial valve piston 204 is sleeved on the axial valve piston rod 206 and fixedly connected thereto. It is the same as the pressure valve control assembly 3. The axial valve piston 20 4 is fixedly connected to the axial valve piston rod 206 by shrink fitting, the axial valve spring 205 is arranged between the axial valve bushing 204 and the rear axial valve bushing assembly, the axial valve piston rod 206 is dynamically sealed with the inner side of the axial valve bushing assembly 202 through the first axial valve sealing ring 2021 and the second axial valve sealing ring 2022, the axial valve piston 204 is installed with a dynamic sealing ring, and is dynamically sealed with the inner cavity of the axial valve cylinder body 201 through the dynamic sealing ring, the axial valve sealing assembly 203 cooperates with the axial valve piston rod 206 to realize the on and off of the axial valve assembly 2; the solenoid valve 210 is fixedly connected to the axial valve cylinder body 201 through the axial valve adapter plate 209.

[0034] The first and second axially-acting valve sealing rings 2021 and 2022 are used to seal air and liquid, respectively, effectively preventing gas and liquid leakage through a two-stage linkage. The axially-acting valve piston 204 divides the axially-acting valve cylinder 201 into a left axially-acting valve chamber 2011 and a right axially-acting valve chamber 2012 via a dynamic sealing ring. Similar to the on-off principle of the pressure control valve assembly 3, the axially-acting valve assembly 2 is connected to the left and right axially-acting valve chambers 2011 and 2012 respectively via a solenoid valve 210, controlling the high-pressure gas to enter the left and right axially-acting valve chambers, thereby driving the axially-acting valve piston 204 to move left and right. As shown in the figure, when moving left, the axially-acting valve piston 204 drives the axially-acting valve piston rod 206 to move left, cooperating with the axially-acting valve sealing assembly 203 to seal. When moving right, the axially-acting valve piston drives the axially-acting valve piston rod to move right, separating the axially-acting valve piston rod 206 from the axially-acting valve sealing assembly 203 and opening. The axial-acting valve seal assembly 203 includes a sealing ring secured by bolts and having front and rear (left and right) flow holes. The axial-acting valve piston rod 206 also has front and rear (left and right) flow holes. When the axial-acting valve piston rod 206 moves left, the sealing ring of the axial-acting valve seal assembly 203 blocks the flow holes of the axial-acting valve piston rod 206, closing the axial-acting valve assembly. When the axial-acting valve piston rod 206 moves right, fluid flows into the flow holes of the axial-acting valve seal assembly 203, flows through the flow holes of the axial-acting valve piston rod 206, and flows out of the axial-acting valve end cover 207. The opening and closing of the axial-acting valve assembly 2 is controlled by a solenoid valve 210.

[0035] At the moment of switching, the axial valve piston rod 206 is easily worn due to the impact of high-pressure fluid, which reduces its service life. In order to correct the eccentricity and vibration of the axial valve piston rod 206 caused by the impact force of the high-pressure fluid, a support ring 2023 is further provided on the inner side of the axial valve bushing assembly 202, and the support ring 2023 is dynamically sealed with the axial valve piston rod 206.

[0036] Example 2:

[0037] like Figure 2 、 6As shown, the axial valve assembly 2 adopts a three-way axial valve assembly, and an axial valve C-port end cover 211 is provided between the rear axial valve bushing assembly and the axial valve end cover 207 at the rear end. The inlet of the axial valve C-port end cover 211 is statically sealed with the rear axial valve bushing assembly through a sealing ring, and the first outlet of the axial valve C-port end cover 211 is fixedly connected to the axial valve end cover 207. An axial valve sealing seat 212 is provided on the first outlet and the inner side of the axial valve end cover 207. The sealing seat 212 is statically sealed with the axial valve C-port end cover 211 and the axial valve end cover 207 through sealing rings respectively; the axial valve sealing seat 212 is provided with flow holes at the front and back, the front end of the flow hole is connected with the inlet and the second outlet of the axial valve C-port end cover 211, and the rear end is connected with the axial valve end cover 207, a sealing ring is installed at the front end of the axial valve sealing seat 212, and the axial valve piston rod 206 cooperates with the axial valve sealing seat 212 to realize the unloading of the rear end of the axial valve assembly 2.

[0038] like Figure 5 、 6 As shown, in order to facilitate the installation of the present invention, an axial valve connecting plate 208 is provided on the outside of the axial valve end cover 207. At the same time, a sealing ring is installed on the outside of the front axial valve bushing and is sealed with the inside of the fluid outlet of the valve block 1 through the sealing ring.

[0039] In the present invention, the pressure regulating valve adopts a manual pressure regulating valve or an electric pressure regulating valve. The selection is based on actual production needs to expand the scope of application. When the electric pressure regulating valve is selected, the electric pressure regulating valve can receive an analog signal. When the analog signal is received, the pressure regulating valve will output the corresponding air source pressure according to the received analog signal. According to the different air source pressures, the pressure control valve assembly 3 outputs the corresponding fluid pressure. In combination with the axial valve assembly 2, the pressure-adjustable quick on-off valve can complete the output pressure proportional adjustment output and quickly realize the channel and unloading functions.

[0040] The present invention unloads the front and rear ends of the axial valve as follows:

[0041] like Figure 1As shown, when the quick on-off valve of the two-way axial valve assembly is working, working gas is provided to the load solenoid valve, and the pressure regulating valve is adjusted to a suitable working pressure. The fluid input is connected to the fluid inlet of the valve port, the solenoid valve is energized, and the two-way axial valve assembly and the pressure control valve assembly work simultaneously. The two-way axial valve assembly controls the on-off of the fluid, and the pressure control valve assembly controls the fluid pressure entering the two-way axial valve assembly by diverting the fluid. The fluid is connected to the working end through the axial valve end cover of the two-way axial valve assembly. When switching is required, the solenoid valve is powered off, the two-way axial valve assembly is shut off, and at the same time, the working gas of the pressure control valve assembly is discharged through the air pipe via the solenoid valve. The pressure control valve assembly is now fully opened, and the fluid flows back to the initial end through the pressure control valve assembly. This can effectively unload the front end of the two-way axial valve assembly, avoiding the loss of high-pressure fluid to the two-way axial valve assembly due to rapid startup. On the one hand, it can improve the service life, and on the other hand, it can improve the service life of the working pump. In actual use, the quick on-off valve of the present invention is generally connected to the high-pressure fluid to control the rapid on and off of the high-pressure fluid. The high-pressure fluid is output through the working pump. When quickly shutting down, if there is no effective unloading, it is easy to cause the working pump to suffocate and burn. Through the pressure valve control assembly, the high-pressure fluid can be effectively unloaded to protect the working pump.

[0042] like Figure 2 As shown, when the quick on-off valve of the three-way axial valve assembly is working, the on-off and front-end unloading of the three-way axial valve assembly are the same as those of the above-mentioned two-way axial valve assembly. When the solenoid valve is powered off, the pressure control valve assembly is unloaded. At the same time, the three-way axial valve assembly unloads the rear end of the three-way axial valve assembly through the C-port end cover of the axial valve. The high-pressure fluid at the rear end of the three-way axial valve assembly flows back to the initial end through the C-port end cover of the axial valve, thereby achieving the purpose of quickly switching the fluid and quickly unloading the pressure in the pipeline at the rear end of the valve.

[0043] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pressure-adjustable quick-on / off valve, characterized by: The invention comprises a valve block (1), an axial valve assembly (2) and a pressure control valve assembly (3); the valve block (1) is used for fluid diversion, and comprises a fluid inlet and a plurality of fluid outlets; the axial valve assembly (2) is sealedly connected to the fluid outlet of the valve block (1), and is used to control the on-off of the fluid and unload the rear end of the axial valve assembly (2); the axial valve assembly (2) adopts a two-way axial valve assembly or a three-way axial valve assembly; the pressure control valve assembly (3) is sealedly connected to the other fluid outlet of the valve block (1); The invention is used for unloading the front end of the axial valve assembly (2) and regulating the pressure of the fluid flowing into the axial valve assembly (2); the axial valve assembly (2) includes a solenoid valve, which drives the on-off of the axial valve assembly by controlling the high-pressure gas to flow into the inner cavity of the axial valve assembly; the pressure control valve assembly (3) includes a pressure regulating valve, the outlet of the solenoid valve is also connected to the inlet of the pressure regulating valve through an air pipe, and the outlet of the pressure regulating valve is connected to the inner cavity of the pressure control valve assembly (3) to control the on-off of the pressure control valve assembly (3).

2. A pressure-adjustable quick-on / off valve according to claim 1, characterized in that: The pressure control valve assembly (3) comprises a pressure valve cylinder (301), a pressure valve end cover (302), a pressure valve piston rod (303), a pressure valve spring (304), a pressure valve piston (305), a pressure valve sealing assembly (306), a pressure valve bushing (307), a pressure valve sealing seat (308) and the pressure regulating valve (310); the pressure valve end cover (302) is arranged at the rear end of the pressure valve cylinder (301) and is statically sealed therewith via a sealing ring; the pressure valve bushing (307) is mounted at the front end of the pressure valve cylinder (301); the pressure valve sealing seat (308) is arranged at the front end of the pressure valve bushing (307) and is statically sealed therewith; the pressure valve piston rod (303), the pressure valve spring (304) and the pressure valve piston (305) are arranged in the inner cavity of the pressure valve cylinder (301); the pressure valve piston (305) is sleeved on the pressure valve piston The pressure control valve assembly (3) is mounted on the pressure control valve piston (303) and is fixedly connected thereto. The pressure valve spring (304) is arranged between the pressure valve piston (305) and the pressure valve end cover (302). The front portion of the pressure valve piston rod (303) is dynamically sealed with the inner side of the pressure valve bushing (307) via a second dynamic sealing ring 3061, and the rear portion thereof is dynamically sealed with the inner side of the pressure valve end cover (302) via a first pressure valve sealing ring (3021) and a second pressure valve sealing ring (3022). The pressure valve piston (305) is mounted with a first dynamic sealing ring (3051) and is dynamically sealed with the inner cavity of the pressure valve cylinder (301) via the first dynamic sealing ring (3051). The pressure valve sealing assembly (306) is fixed to the front end of the pressure valve piston rod (303). The pressure valve sealing assembly (306) cooperates with the pressure valve sealing seat (308) to realize the on / off of the pressure control valve assembly (3); The pressure regulating valve (310) is fixedly connected to the pressure valve cylinder (301) via a pressure valve adapter plate (309).

3. A pressure-adjustable quick-on / off valve according to claim 2, characterized in that: A sealing ring is provided between the pressure valve bushing (307) and the pressure valve sealing seat (308), and is sealedly connected to the inner side of the fluid outlet of the valve block (1) via the sealing ring.

4. A pressure-adjustable quick-on / off valve according to any one of claims 1 to 3, characterized in that: The axial valve assembly (2) comprises an axial valve cylinder (201), an axial valve bushing assembly (202), an axial valve sealing assembly (203), an axial valve piston (204), an axial valve spring (205), an axial valve piston rod (206), an axial valve end cover (207) and the solenoid valve (210); the front and rear ends of the axial valve cylinder (201) are both provided with the axial valve bushing assembly (202) to form a front axial valve bushing assembly and a rear axial valve bushing assembly; the axial valve bushing assembly (202) is statically sealed with the axial valve cylinder (201) via a sealing ring; the front end of the front axial valve bushing assembly is provided with the axial valve sealing assembly (203); the rear axial valve bushing is statically sealed with the axial valve end cover (207) via a sealing ring; The inner cavity of the axial valve cylinder (201) is provided with the axial valve piston (204), the axial valve spring (205) and the axial valve piston rod (206); the axial valve piston (204) is sleeved on the axial valve piston rod (206) and is fixedly connected thereto; the axial valve spring (205) is provided between the axial valve piston (204) and the rear axial valve bushing assembly; the axial valve piston rod (206) is connected to the axial valve through the first axial valve sealing ring (221) and the second axial valve. The valve sealing ring (2022) is dynamically sealed to the inner side of the axial valve bushing assembly (202); the axial valve piston (204) is provided with a dynamic sealing ring and is dynamically sealed to the inner cavity of the axial valve cylinder (201) through the dynamic sealing ring; the axial valve sealing assembly (203) cooperates with the axial valve piston rod (206) to realize the on-off of the axial valve assembly (2); the solenoid valve (210) is fixedly connected to the axial valve cylinder (201) through the axial valve adapter plate (209).

5. The pressure-adjustable quick-on / off valve according to claim 4, characterized in that: A support ring (2023) is further provided on the inner side of the shaft-actuated valve bushing assembly (202), and the support ring (2023) is dynamically sealedly connected to the shaft-actuated valve piston rod (206).

6. A pressure-adjustable quick-on / off valve according to claim 5, characterized in that: An axial valve C-port end cover (211) is provided between the rear axial valve bushing assembly at the rear end of the axial valve assembly (2) and the axial valve end cover (207). The inlet of the axial valve C-port end cover (211) is statically sealed with the rear axial valve bushing assembly via a sealing ring. The first outlet of the axial valve C-port end cover (211) is fixedly connected to the axial valve end cover (207). An axial valve sealing seat (212) is provided on the inner side of the first outlet and the axial valve end cover (207). The axial valve sealing seat (212) is divided into The axial valve seat (212) is statically sealed with the C-port end cover (211) of the axial valve and the axial valve end cover (207) through sealing rings; the axial valve sealing seat (212) is provided with flow holes at the front and rear ends, the front end of the flow hole is connected to the inlet and the second outlet of the C-port end cover (211) of the axial valve, and the rear end thereof is connected to the axial valve end cover (207); the front end of the axial valve sealing seat (212) is provided with a sealing ring, and the axial valve piston rod (206) cooperates with the axial valve sealing seat (212) to realize the unloading of the rear end of the axial valve assembly (2).

7. A pressure-adjustable quick on-off valve according to any one of claims 5 or 6, characterized in that: An axially-actuated valve connecting plate (208) is provided on the outer side of the axially-actuated valve end cover (207).

8. The pressure-adjustable quick-on / off valve according to claim 7, characterized in that: A sealing ring is installed on the outside of the front axle movable valve bushing, and is sealed and connected to the inside of the fluid outlet of the valve block (1) through the sealing ring.

9. The pressure-adjustable quick-on / off valve according to claim 1, characterized in that: The pressure regulating valve is a manual pressure regulating valve or an electric pressure regulating valve.

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