Axial bypass on-off valve

Abstract

The utility model discloses an axial bypass on-off valve which comprises a cylinder body, a lining, a left end cover, a right end cover, a piston, a piston rod, an electromagnetic valve, a magnetic switch, a supporting ring and a sealing gasket. The piston rod is designed to be tubular, the pressure balance cavity is formed in the inner cavity of the left end cover, and therefore pressure balance of the left end and the right end of the piston rod is achieved. And the high-pressure fluid acts on the outer wall of the piston rod to enable the piston rod to be in a suspended state, and the electromagnetic valve can easily drive the piston rod to slide left and right, so that opening and closing of the valve are easily controlled, and the valve can be applied to high-pressure or ultrahigh-pressure fluid. In addition, a supporting ring and a sealing gasket are introduced to serve as a switch assembly of the valve, and stable operation of the on-off valve in high-pressure or ultrahigh-pressure fluid can be guaranteed through matching of the supporting ring and the sealing gasket. The outer surface of the piston rod is tightly attached to the inner wall of the through hole of the supporting ring, stable sliding of the piston rod in the left and right bushings can be guaranteed, and eccentricity of the piston rod during sliding is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and particularly relates to an axial bypass on-off valve. Background Art

[0002] An axial bypass on-off valve is a kind of on-off valve in fluid control engineering. It adopts a pressure balance design, which can reduce resistance and achieve quick on-off. With the technological innovation in all walks of life, the market has higher and higher requirements for high pressure, low leakage, high speed, and high frequency of fluids.

[0003] At present, the existing products on the market have the following defects:

[0004] 1. During use, the axis moves back and forth, and the fluid forms resistance to the axis.

[0005] 2. Under the impact of the fluid, it is extremely easy to damage the seals used in conjunction with the axis, and over time, it will cause medium leakage.

[0006] 3. Especially under the use conditions of high pressure and ultra-high pressure, these defects are even more prominent. They not only affect the service life of the valve, but also cause production waste and even pose potential safety hazards. Content of the Utility Model

[0007] The technical problem solved by the utility model is to provide an axial bypass on-off valve with a long service life and resistance to high pressure and ultra-high pressure.

[0008] The technical solution adopted by the utility model to solve its technical problems is:

[0009] An axial bypass on-off valve includes a cylinder block, a bushing, a left end cover, a right end cover, a piston, a piston rod, an electromagnetic valve, and a magnetic switch;

[0010] The left end cover and the right end cover are respectively connected to the left and right ends of the cylinder block through the bushing and fixed to the left and right ends of the cylinder block by bolts;

[0011] The electromagnetic valve drives the piston to slide left and right in the inner cavity of the cylinder block through the magnetic switch and the magnetic ring. The piston is installed on the piston rod and drives the piston rod to slide left and right. The left and right ends of the piston rod respectively pass through the bushings at the left and right ends of the cylinder block and extend into the inner cavities of the left end cover and the right end cover;

[0012] The electromagnetic valve and the magnetic switch are regularly installed and fixed on the outer surface of the cylinder block. The magnetic ring is nested on the outer surface of the piston, and a piston seal is also nested on the outer surface of the piston. The piston is in contact and sealed with the inner wall of the cylinder block through the piston seal;

[0013] The right end cover is regularly provided with a fluid inlet and a fluid outlet, and the fluid inlet and the fluid outlet communicate with the inner cavity of the right end cover to form a fluid passage;

[0014] The piston rod is a tubular piston rod. The tubular piston rod and a support ring and a gasket cooperate in the inner cavity of the right end cover to form a valve switch assembly. The support ring and the gasket are installed and fixed in the inner cavity of the right end cover. The outer surface of the support ring is closely attached to the inner cavity of the right end cover. The right end of the tubular piston rod passes through the bushing and extends into the support ring. The outer surface of the tubular piston rod is closely attached to the inner wall of the support ring. The right end face of the support ring is designed with an opening to form a water inlet, and a number of water outlets are regularly arranged on its side surface. The water inlet communicates with the fluid inlet, and the plurality of water outlets converge and then communicate with the fluid outlet; The gasket is provided with an opening in the middle and is installed at the water inlet on the right side of the support ring. The tubular piston rod moves to the right and extends into the support ring to contact and cooperate with the gasket to close the water inlet; The tubular piston rod moves to the left and separates from the gasket to open the water inlet, so as to form the fluid passage between the fluid inlet, the through hole of the support ring and the fluid outlet;

[0015] Or the tubular piston rod and the support ring directly cooperate in the inner cavity of the right end cover to form a valve switch assembly. The support ring is installed and fixed in the inner cavity of the right end cover. A second inner cavity is further arranged in the inner cavity of the right end cover. The right end of the tubular piston rod passes through the support ring and extends into the second inner cavity. The outer surface of the tubular piston rod is closely attached to the inner wall of the second inner cavity; A support ring water inlet groove is arranged on the right end face of the support ring, and support ring water outlets are regularly arranged on its side surface. The support ring water inlet groove communicates with the fluid inlet, the support ring water outlets communicate with the fluid outlet, and the support ring water inlet groove communicates with the support ring water outlets; A piston rod water outlet is regularly arranged on the right side surface of the right end of the tubular piston rod. The tubular piston rod moves to the right to extend into the second inner cavity and is closely attached to the inner wall of the second inner cavity to close the piston rod water inlet. The piston rod moves to the left to communicate the piston rod water outlet and the support ring water inlet groove, so as to form a fluid passage between the fluid inlet and the fluid outlet.

[0016] Further, the bushing includes a cylinder body connection boss for being clamped into the inner cavity of the cylinder body and an end cover connection boss for being clamped into the inner cavity of the left end cover or the inner cavity of the right end cover. The cylinder body connection boss is clamped into the inner cavity of the cylinder body and is closely attached to its inner wall. The end cover connection boss is clamped into the inner cavity of the left end cover or the inner cavity of the right end cover and is closely attached to its inner wall.

[0017] Preferably, the distance between the cylinder block connection boss and the end cover connection boss is less than the diameter of the bushing itself.

[0018] Furthermore, one or more sealing rings for sealing are regularly arranged between the bushing and the cylinder block, the left end cover, and the right end cover; one or more sealing rings for sealing are also regularly arranged between the outer surface of the piston rod and the inner walls of the left and right bushings.

[0019] Furthermore, on the side of the gasket facing the right port of the piston rod, there is a convex gasket boss regularly arranged. The right port of the piston rod is designed with a cutting edge to form a right end cutting edge of the piston rod. A line seal plus a surface gasket design is adopted between the right end cutting edge of the piston rod and the gasket boss to achieve tight fitting and sealing between the right end cutting edge of the piston rod and the gasket boss.

[0020] Furthermore, a spring is arranged between the piston and the bushing at the left end of the cylinder block;

[0021] Furthermore, the several water outlet holes on the side surface of the support ring are arranged by drilling holes around the side surface of the support ring and are evenly arranged in a circle on the side surface of the support ring.

[0022] Furthermore, a ring-shaped water outlet groove is also regularly arranged on the side surface of the support ring. The several water outlet holes are regularly arranged in the ring-shaped water outlet groove, and the ring-shaped water outlet groove is communicated with the fluid outlet.

[0023] The beneficial effects of the present utility model are:

[0024] 1. By designing the piston rod to be tubular and arranging a pressure balance cavity in the inner cavity of the left end cover, the present utility model realizes the pressure balance at both ends of the piston rod. And the action of high-pressure fluid on the outer wall of the piston rod makes it in a suspended state, and the solenoid valve can easily drive the piston rod to slide left and right. Thus, the opening and closing of the valve can be easily controlled, and the valve can be applied to high-pressure fluids or ultra-high-pressure fluids.

[0025] 2. By introducing a support ring and a gasket as the switching components of the valve, through the cooperation of the support ring and the gasket, the present utility model can ensure the stable operation of the on-off valve in high-pressure or ultra-high-pressure fluids. The outer surface of the piston rod is in close fit with the inner wall of the through hole of the support ring. The support ring, as a support member of the piston rod, can ensure the stable sliding of the piston rod in the left and right bushings and avoid eccentricity of the piston rod during sliding.

[0026] 3. When the on-off valve of the present utility model is switched on and off instantaneously by the piston rod, high-pressure fluid will generate a huge impact force on the piston rod. By introducing a support ring, the eccentric vibration caused by the impact force of the high-pressure fluid can be corrected. At the same time, it can also reduce the wear of the piston rod's self-weight on the bushing and the wear of the sealing ring between the bushing and the piston rod, greatly reducing the risk of leakage.

[0027] 4. Through the setting of the pressure balance cavity in the present utility model, the pressure balance of the tubular piston rod is maintained. The sealing gasket cooperating with the piston rod is surrounded by high-pressure fluid both before and after, which ensures uniform force and can avoid the instantaneous impact of high-pressure fluid, solving the bursting risk brought by the instantaneous impact of high-pressure fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of the present utility model;

[0029] Figure 2 is a schematic external structure diagram of the present utility model;

[0030] Figure 3 is Figure 1 a split view of;

[0031] Figure 4 is Figure 1 a structural diagram of the internal partial components in;

[0032] Figure 5 is Figure 3 a structural diagram of the right-side partial components in;

[0033] Figure 6 is Figure 1 a diagram of the valve closed state and fluid flow direction in;

[0034] Figure 7 is Figure 1 a diagram of the valve open state and fluid flow direction in;

[0035] Figure 8 is a schematic diagram of another deformed structure of the present utility model;

[0036] Figure 9 is Figure 8 a split view of;

[0037] Figure 10 is Figure 8 a structural diagram of the internal partial components in;

[0038] Figure 11 is Figure 10 a three-dimensional structural diagram of the support ring in;

[0039] Figure 12 is Figure 8Valve closed state and fluid flow diagram therein;

[0040] Figure 13 For Figure 8 Valve open state and fluid flow diagram therein.

[0041] The markings in the figure are:

[0042] 1. Cylinder block; 101. Left chamber of the cylinder block; 102. Right chamber of the cylinder block;

[0043] 2. Bushing; 201. Cylinder block connection boss; 202. End cover connection boss;

[0044] 3. Left end cover; 301. Inner cavity of the left end cover; 3011. Bushing slot; 3012. Pressure balance cavity;

[0045] 4. Right end cover; 401. Inner cavity of the right end cover; 402. Fluid inlet; 403. Fluid outlet; 4021. Inflow channel; 4031. Outflow channel; 4011. Outer inner cavity of the right end cover; 4012. Inner inner cavity of the right end cover;

[0046] 5. Piston; 501. Piston seal;

[0047] 6. Piston rod; 601. Piston rod through hole; 602. Right port of the piston rod; 603. Water outlet of the piston rod;

[0048] 7. Support ring; 701. Support ring through hole; 7011. Sealing gasket slot, 702. Water inlet, 703. Water outlet; 704. Water outlet groove; 705. Support ring water inlet groove; 706. Support ring water outlet;

[0049] 8. Sealing gasket; 801. Sealing gasket boss;

[0050] 9. Spring; 10. Solenoid valve; 11. Silencer; 12. Magnetic ring; 13. Sealing ring; 14. Magnetic switch; 15. Stud. Detailed implementation manners

[0051] To make the above objects, features and advantages of the present utility model more obvious and understandable, the following will make a detailed description of the specific implementation manners of the present utility model with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this utility model belongs. The terms used in the description of this utility model herein are for the purpose of describing specific embodiments only and are not intended to limit this utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0053] As Figures 1 - 7 shown, this utility model provides an axial bypass on-off valve, which includes a cylinder block 1, a bushing 2, a left end cover 3, a right end cover 4, a piston 5, a piston rod 6, a support ring 7, a gasket 8, a spring 9, a solenoid valve 10 and a magnetic switch 14.

[0054] As Figure 1 shown, the bushing 2 is installed and fixed at both left and right ends of the cylinder block 1 to form left and right bushings. The left and right bushings respectively serve as connectors and seals between the left and right end covers (i.e., the left end cover 3 and the right end cover 4) and the cylinder block 1, and also serve as seals between the piston rod 6 and the left end cover 3, the cylinder block 1, and the right end cover 4. Among them, the left bushing is used to seal and connect the left end of the left end cover 3 and the cylinder block 1, and the left end cover 3 is installed and fixed at the left end of the cylinder block 1 through a stud 15; the right bushing is used to seal and connect the right end of the right end cover 4 and the cylinder block 1, and the right end cover 4 is installed and fixed at the right end of the cylinder block 1 through a stud.

[0055] Further, as Figure 3 shown, the bushing 2 includes a cylinder block connection boss 201 for fitting with the inner wall of the cylinder block and an end cover connection boss 202 for fitting with the inner wall of the left end cover or the right end cover. Among them, the cylinder block connection boss 201 is snapped into the inner cavity of the cylinder block and fits tightly with its inner wall; the end cover connection boss 202 is snapped into the card slot of the left end cover or the right end cover and fits tightly with its inner wall. Through the transfer of the bushing 2, the left end cover 3 and the right end cover 4 are installed and fixed at both left and right ends of the cylinder block 1, and internal sealing treatment of the cylinder block 1, the left end cover 3 and the right end cover 4 is realized, forming a sealed environment inside.

[0056] Further, the diameters of the cylinder block connection boss 201 and the end cover connection boss 202 are smaller than the diameter of the bushing itself, so as to form a baffle that separates them between the cylinder block connection boss and the end cover connection boss. Through the baffle, the inner cavity of the cylinder block can be independently separated and sealed, preventing the pressure source in the inner cavity of the cylinder block from leaking into the left end cover or the right end cover, and also preventing the high-pressure fluid in the inner cavities of the left end cover and the right end cover from leaking into the cylinder block.

[0057] Further, one or more sealing rings 13 for sealing are provided between the cylinder block 1, the left end cover 3, the right end cover 4 and the bushing 2.

[0058] As Figure 3As shown, in one embodiment, seal grooves for installing the seal ring 13 are regularly arranged on the peripheries of the cylinder block connecting boss 201 and the end cover connecting boss 202. The seal ring 13 is fixedly installed in the seal groove on the periphery of the bushing 2.

[0059] Furthermore, as Figure 1 shown, the left and right ends of the piston rod 6 respectively pass through the left and right bushings and cooperate with them, and are slidably arranged in the left and right bushings. Among them, the left end of the piston rod 6 passes through the left bushing and extends into the inner cavity 301 of the left end cover, and the right end of the piston rod passes through the right bushing and extends into the inner cavity 401 of the right end cover.

[0060] Furthermore, a seal ring 13 for sealing is also arranged between the bushing 2 and the piston rod 6. Among them, by regularly arranging one or more seal grooves in the inner wall of the bushing 2 and fittingly installing the seal ring 13, the sealing between the bushing 2 and the piston rod 6 is realized. Through the sealing treatment between the left and right bushings and the piston rod, the inner cavities of the left end cover, the cylinder block, and the right end cover are respectively sealed and separated.

[0061] As Figure 1 shown, the piston 5 is fixedly installed on the piston rod 6 to drive the piston rod 6 to slide in the left and right bushings. Among them, a piston seal groove is arranged on the periphery of the piston 5, and a piston seal 501 is fittingly installed. The piston 5 contacts the inner wall of the cylinder block 1 through the piston seal 501, so that the inner cavity of the cylinder block 1 is divided into two parts by the piston seal 501, forming the left and right chambers of the cylinder block (i.e., the left chamber 101 of the cylinder block and the right chamber 102 of the cylinder block).

[0062] Furthermore, the solenoid valve 10 is fixedly installed on the cylinder block 1 and is respectively communicated with the left and right chambers of the cylinder block through the air inlet holes on the cylinder block 1. Thus, a pressure source is conveyed or released into the left and right chambers of the cylinder block through the solenoid valve to control the left and right sliding of the piston 5 in the inner cavity of the cylinder block 1, and finally drive the piston rod 6 to slide left and right in the inner cavity of the cylinder block 1.

[0063] As Figure 1 and 2 shown, a magnetic ring groove is also arranged on the periphery of the piston 5, and a magnetic ring 12 is fittingly installed. Magnetic switches 14 are respectively installed on the outer surfaces of the cylinder block 1 and the left end cover 3, and between the cylinder block 1 and the right end cover 4. The magnetic switches 14 transmit signals with the magnetic ring 12, and through the cooperation of the magnetic switches and the magnetic ring, it is convenient for the solenoid valve 10 to control the movement of the piston 5.

[0064] Furthermore, as Figure 1 shown, a spring 9 is also arranged between the piston 5 and the left bushing. Figure 1The middle shows the initial state of the on-off valve (i.e., the valve closed state). The spring 9 provides an elastic force to the right for the piston 5 to drive the piston 5 to move to the right. The piston 5 drives the piston rod 6 to move to the right to press against the sealing gasket 8, thereby closing the water inlet and outlet on the support ring 7 to close the valve.

[0065] Furthermore, as Figure 3 shown, on the right end cover 4, there are regularly arranged a right end cover inner cavity 401, a fluid inlet 402, and a fluid outlet 403. Among them, the fluid inlet 402 and the fluid outlet 403 are respectively communicated with the right end cover inner cavity 401. The high-pressure fluid flows in from the fluid inlet 402, passes through the right end cover inner cavity 401, and finally flows out from the fluid outlet 403.

[0066] Furthermore, the support ring 7 and the sealing gasket 8 are installed and fixed in the right end cover inner cavity 401 and are pressed and fixed in the right end cover inner cavity 401 through the end cover connection boss 202 of the right bushing. Among them, the outer surface of the support ring 7 contacts and closely fits with the inner wall of the right end cover inner cavity 401.

[0067] Furthermore, the support ring 7 and the sealing gasket 8 cooperate as the switch assembly of the valve. The fluid inlet 402 communicates with the fluid outlet 401 through the support ring 7 and the sealing gasket 8.

[0068] In the high-pressure resistant axial bypass on-off valve of the present utility model, by arranging the fluid inlet 402 and the fluid outlet 403 on the same side end, that is, on the right end cover, an axial bypass on-off valve is formed.

[0069] As Figure 3 shown, in an embodiment, the left end of the right end cover 4 is grooved inward to form the right end cover inner cavity 401. The fluid inlet 402 horizontally penetrates the right end of the right end cover and penetrates into the right end cover inner cavity 401, thereby communicating the fluid inlet 402 and the right end cover inner cavity 401 and forming an inflow channel 4021 between the fluid inlet 402 and the right end cover inner cavity 401. The fluid outlet 403 vertically penetrates the lower end of the right end cover and penetrates into the right end cover inner cavity 401, thereby communicating the right end cover inner cavity 401 and the fluid outlet 403 and forming an outflow channel 4031 between the right end cover inner cavity 401 and the fluid outlet 403.

[0070] Furthermore, the support ring 7 is installed and fixed in the right end cover inner cavity 401. On the one hand, it serves as the switch assembly between the inflow channel 4021 and the outflow channel 4031, and on the other hand, it serves as the support assembly for the piston rod 6.

[0071] As Figures 3 - 5As shown, the left and right end faces of the support ring 7 are provided with through holes, forming a support ring through hole 701 for the piston rod 6 to pass through conveniently. Among them, the aperture of the support ring through hole 701 is the same as that of the bushing 2, so that the piston rod 6 can be in close contact with the support ring 7, thereby further improving the stability of the piston rod through the support ring and avoiding the eccentricity of the piston rod.

[0072] Furthermore, the piston rod 6 extends into the support ring through hole 701 and slides left and right in the support ring through hole 701, so as to be slidably arranged in the support ring 7. Among them, the outer surface of the piston rod 6 contacts and fits tightly with the inner wall of the support ring through hole 701. The support ring 7, as a support for the piston rod 6, can ensure that the piston rod 6 slides stably in the left and right bushings and avoid eccentricity when the piston rod slides.

[0073] Furthermore, as Figure 4 and Figure 5 shown, a gasket groove 7011 for installing the gasket 8 is formed by inwardly grooving on the right end face of the support ring through hole 701, and the gasket 8 is installed and fixed in the gasket groove 7011. When the support ring 7 is installed and fixed in the inner cavity 401 of the right end cover, the end cover connection boss at the right end of the right bushing presses the support ring 7 and the gasket 8, so as to press and fix the gasket 8 in the gasket groove 7011 and the inner cavity 401 of the right end cover to prevent the gasket 8 from falling off.

[0074] Furthermore, as Figure 5 shown, the left and right end faces of the gasket 8 are provided with through openings, so as to open up the inflow channel 4021 and the support ring through hole 701, forming a water inlet 702 for the high-pressure fluid to flow in conveniently. The high-pressure fluid flows from the fluid inlet 402 into the inflow channel 4021, and then flows into the support ring through hole 701 through the water inlet 702 on the gasket.

[0075] Furthermore, in order to discharge the high-pressure fluid from the fluid outlet 403, a number of water outlets 703 are regularly arranged on the periphery of the support ring 7. Among them, the number of water outlets is arranged by drilling holes around the side surface of the support ring 7, so as to be evenly arranged in a circle on the support ring and penetrate through the inner wall of the support ring and communicate with the internal support ring through hole 701, thereby forming a channel for the high-pressure fluid to flow conveniently between the water inlet 701 and the water outlets 703.

[0076] Furthermore, as Figure 3 and Figure 4As shown, a ring-shaped water outlet groove 704 that is recessed inward is regularly arranged on the outer periphery of the support ring 7. A number of water outlet ports 703 are regularly arranged in the ring-shaped water outlet groove 704 and are arranged around the ring-shaped water outlet groove 704. By arranging a number of water outlet ports 703 around the ring-shaped water outlet groove 704, the high-pressure fluid in the support ring through-hole 701 can be radially ejected through a number of annularly arranged water outlet diameters and converge into the ring-shaped water outlet groove 704. Then, it flows into the outflow channel 4031 through the ring-shaped water outlet groove 704 and finally flows out from the fluid outlet 403 on the right end cover.

[0077] At the same time, the circumferences of a number of water outlet ports 703 are evenly distributed, which can ensure uniform water outlet and ensure that the inner circumferences of the support ring 7 and the piston rod 6 are balanced under fluid pressure.

[0078] As Figure 5 shown, a raised gasket boss 801 is arranged on the left side of the gasket 8 along the direction of the support ring through-hole 701. Among them, the left and right end faces of the gasket 8 are provided with through holes, forming a gasket through-hole. The gasket through-hole penetrates the gasket boss 801, thereby penetrating the gasket 8 and forming a water inlet 702 in the middle of it.

[0079] Furthermore, as Figure 4 shown, the piston rod 6 adopts a tubular piston rod, and through holes are arranged through the left and right end faces, forming a piston rod through-hole 601. Among them, the right end of the piston rod 6 is the right port 602 of the piston rod. The right port 602 of the piston rod adopts a blade design, and the right end blade of the piston rod cooperates with the gasket boss 801 for sealing, thereby sealing and closing the water inlet 701 to close the valve.

[0080] Furthermore, a design of line seal plus surface seal is adopted between the piston rod 6 and the gasket 8. The gasket 8 adopts a through structure, which can not only seal with the piston rod but also be in communication with the inner wall of the piston rod.

[0081] As Figure 3 shown, a left end cover inner cavity 301 is regularly arranged on the left end cover. The left end cover inner cavity 301 is a stepped inner cavity, which is divided into an outer inner cavity and an inner inner cavity. The diameter of the inner inner cavity is smaller than that of the outer inner cavity, so it is stepped and arranged inside the outer inner cavity. Among them, the outer inner cavity serves as a bushing clamping groove 3011 for the clamping connection of the end cover connection boss 202; its inner inner cavity serves as a pressure balance cavity 3012 for balancing the pressures at the left and right ends of the piston rod 6.

[0082] Furthermore, the left end of the piston rod 6 passes through the left bushing and extends into the pressure balance cavity 3012, and the right end of the piston rod passes through the right bushing and extends into the support ring through-hole 701 of the support ring. Among them, the pressure balance cavity 3012 is communicated with the support ring through-hole 701 through the piston rod through-hole 601.

[0083] AsFigure 6 and Figure 7 As shown, they are the schematic diagrams of the switch, fluid flow direction, and working principle of the high-pressure resistant axial bypass on-off valve of the present utility model.

[0084] As Figure 6 and Figure 4 As shown, they are the initial state and closed state diagrams of the valve. In the initial state of the valve, the spring 9 provides a rightward elastic force for the piston 5, driving the piston 5 to slide rightward. The piston 5 drives the piston rod 6 to slide rightward. The piston rod 6 slides in the left and right bushings and the support ring 7. The right end edge of the piston rod 6 is in close contact with the boss of the gasket 8 to achieve tight sealing, thereby closing the high-pressure fluid passage between the water inlet 702 and the water outlet 703.

[0085] After the valve is started, the solenoid valve conveys high-pressure fluid into the left chamber 101 of the cylinder block to increase the pressure in the left chamber of the cylinder block, thereby driving the piston 5 to move rightward. The piston 5 drives the piston rod 6 to press the gasket 8 tightly to the right. At this time, the high-pressure fluid flows in from the fluid inlet 402, passes through the inflow passage 4021 and the water inlet 702, and then enters the piston rod through-hole 601. Then, it flows through the piston rod through-hole 601 into the pressure balance chamber 3012 in the left end cover 3.

[0086] Because the fluid flowing into the pressure balance chamber 3012 is also high-pressure fluid, the pressure balance chamber 3012 is also in a high-pressure state. In this way, both ends of the piston rod 6 are in high-pressure fluid. Also, because the piston rod 6 adopts a through-tube design and is a tubular piston rod, the cross-sectional force-bearing areas at its left and right ends are very small. Therefore, the pressure difference between the left and right ends of the piston rod can be ignored, thereby ensuring force balance on its left and right end faces.

[0087] Furthermore, the high-pressure fluid acts on the outer wall of the piston rod, making the piston rod in a suspended state. At the same time, due to the fluid pressure, the movement resistance of the piston rod can be reduced to the lowest level, thereby reducing the vibration of the piston rod and the degree of wear of the piston rod. Moreover, the outer surface of the piston rod 6 is in close fit with the inner wall of the support ring 7, and the support ring 7 can better ensure the stability of the piston rod 6 and prevent the piston rod 6 from sliding eccentrically.

[0088] As Figure 7As shown, it is the opening state diagram of the valve and the fluid flow diagram. Since the left and right ends of the piston rod 6 are in force balance, and the high-pressure fluid acts on the outer wall of the piston rod, the piston rod is in a suspended state, and its movement resistance can be reduced to the minimum. Therefore, the solenoid valve 10 can easily drive the piston rod to slide to the left, thereby sliding the piston rod to the left to open and separating it from the gasket 8. At this time, the high-pressure fluid flows in from the fluid inlet 402, passes through the inflow channel 4021 and the water inlet 702, and then flows into the support ring through hole 701. The high-pressure fluid in the support ring through hole 701 sprays out in all directions through a number of water outlets 703 evenly arranged in the circumference, and thus flows into the annular water outlet groove 704. After converging in the annular water outlet groove 704, it flows into the outflow channel 4031 and finally flows out through the liquid outlet 403.

[0089] In the on-off valve of the present utility model, at the moment when the piston rod 6 is switched on and off, the high-pressure fluid will generate a huge impact force on the piston rod. At this time, the support ring 7 can correct the eccentric vibration caused by the impact force of the high-pressure fluid. At the same time, it can also reduce the wear of the piston rod self-weight on the bushing 2 and the wear of the sealing ring between the bushing and the piston rod, greatly reducing the risk of leakage.

[0090] At the same time, when the high-pressure fluid passes through the gasket 8, the right end edge of the piston rod 6 impacts the gasket 8, and the gasket 8 will vibrate. Since there is high-pressure fluid surrounding both the front and back of the gasket 8, ensuring uniform force on it, it can avoid the instantaneous impact of the fluid and solve the bursting risk brought by the instantaneous impact of the high-pressure fluid.

[0091] As Figures 8 - 13 shown, it is a deformation design based on the above axial bypass on-off valve. The present utility model also provides a new type of high-pressure-resistant axial bypass on-off valve, which includes a cylinder block 1, a bushing 2, a left end cover 3, a right end cover 4, a piston 5, a piston rod 6, a support ring 7, a spring 9, a solenoid valve 10 and a magnetic switch 14. Among them, the gasket 8 is omitted, and the piston rod 6, the support ring 7 and the right end cover 4 are deformed and designed, and the rest of the structural components remain unchanged.

[0092] Furthermore, as Figure 9 shown, the inner cavity 401 on the left side of the right end cover 4 adopts a stepped inner cavity, including an outer cavity 4011 of the right end cover and an inner cavity 4012 of the right end cover. Among them, the diameter of the inner cavity 4012 of the right end cover is smaller than that of the outer cavity 4011 of the right end cover, and it is regularly arranged inside the outer cavity of the right end cover.

[0093] Furthermore, the outer cavity 4011 of the right end cover serves as a clamping groove for the support ring 7. The support ring 7 is clamped and installed in the outer cavity of the right end cover and is tightly fixed by the end cover connection boss 202 on the right bushing.

[0094] Further, the right end of the piston rod 6 sequentially passes through the right bushing 2 and the support ring 7 and extends into the inner cavity 4012 of the right end cover.

[0095] Further, the outer surface of the piston rod 6 is in close fit with the inner wall of the inner cavity 4012 of the right end cover, and a sealing ring is regularly arranged for sealing treatment. Among them, in one embodiment, a sealing ring groove is formed on the inner wall of the inner cavity 4012 of the right end cover, and a sealing ring is matched and installed, so as to realize the sealing treatment between the piston rod 6 and the inner cavity 4012 of the right end cover.

[0096] Further, the fluid inlet 402 is communicated with the inner cavity 4012 of the right end cover through the inflow channel 4021, and the fluid outlet 403 is communicated with the outer cavity 4011 of the right end cover through the outflow channel 4031.

[0097] As Figure 10 shown, the piston rod 6 adopts a tubular piston rod, and its left and right end faces are provided with through holes, forming a piston rod through hole 601. In this example, the aperture diameters of the openings at the left and right ends of the piston rod are the same, so as to eliminate the pressure difference at the left and right ends of the piston rod as much as possible and make its pressure balanced.

[0098] Further, the right port of the piston rod serves as the water inlet and is communicated with the inner cavity 4012 of the right end cover. A plurality of piston rod water outlets 603 are regularly arranged on its right end side. The plurality of piston rod water outlets 603 are communicated with the water inlet at its right end through the piston rod through hole 601. Among them, the plurality of piston rod water outlets 603 are also evenly distributed in a circumferential circle and are arranged around the right end side of the piston rod.

[0099] Further, as Figure 10 and Figure 11 shown, in this embodiment, the right end face of the support ring 7 is provided with a groove, forming a support ring water inlet groove 705, and its side is also provided with an opening, forming a support ring water outlet 706. Among them, the support ring water inlet groove 705 is communicated with the support ring water outlet 706 to form a support ring flow channel. The support ring water inlet groove 705 faces the inner cavity 4011 of the right end cover and is communicated with it; the support ring water outlet 706 faces the lower end of the right end cover and is communicated with the outflow channel 4031 at the lower end of the right end cover.

[0100] Further, the right end of the piston rod 6 passes through the support ring 7 and is slidably arranged in the support ring 7. The outer surface of the piston rod is in close fit with the inner wall of the support ring 7. Therefore, the piston rod 6 serves as a switch component of the support ring flow channel, so as to control the opening and closing of this valve.

[0101] As Figure 12 and Figure 13 shown, it is the switch schematic diagram, fluid flow direction diagram and working principle diagram of the novel axial bypass on-off valve of the present invention.

[0102] As shown Figure 12 in the figure, it is the initial state and closed state diagram of the novel axial bypass on-off valve of the present utility model.

[0103] In the initial state of the on-off valve, the spring 9 provides elastic force for the piston 5, and the piston 5 drives the piston rod 6 to slide to the right, thereby pushing the right end of the piston rod into the inner cavity 4012 of the right end cover, and pushing a plurality of piston rod water outlets on its right end side into the inner cavity of the right end cover. Thus, a plurality of piston rod water outlets 603 are sealed and closed by the inner wall of the inner cavity 4012 of the right end cover and the sealing ring, thereby closing the valve. At this time, the high-pressure fluid flows in from the fluid inlet 401, flows into the piston rod through hole 601 after passing through the inflow channel 4021, and flows into the pressure balance cavity 3012 of the left end cover through the piston rod through hole 601, thereby realizing the pressure balance between the left and right ends of the piston rod.

[0104] After the valve is started, the solenoid valve increases the pressure in the left chamber 101 of the cylinder block, and the pressure in the left chamber of the cylinder block will maintain the closed state of the piston rod 6. When the solenoid valve unloads the pressure in the left chamber 101 of the cylinder block and increases the pressure source in the right chamber 102 of the cylinder block, the pressure in the right chamber of the cylinder block increases, thereby pushing the piston 5 to move to the left, and the piston 5 drives the piston rod 6 to move to the left. When a plurality of piston rod water outlets 603 on the right side of the piston rod are communicated with the support ring water inlet groove 705 on the support ring 7, the movement stops, thereby opening the inflow channel 4021 and the outflow channel 4031. At this time, the high-pressure fluid flows into the piston rod through hole 601 from the inflow channel 4021, flows into the support ring water inlet groove 705 of the support ring through a plurality of piston rod water outlets 603, and further flows into the outflow channel 4031 through the support ring water outlet 706 on the support ring, and finally flows out from the fluid outlet 403.

[0105] During the working process of the valve, both ends of the piston rod 6 are continuously restricted by the inner walls of the left end cover and the right end cover, so that the piston rod can be prevented from vibrating and eccentric due to fluid impact. At the same time, the sealing ring on the inner cavity of the right end cover can reduce the risk of medium leakage.

[0106] The above water inlet and outlet do not only represent the inflow and outflow of liquid, but can also be used for the inflow and outflow of gas and the air inlet or outlet.

[0107] In the above specific embodiments, the purpose, technical solution and beneficial effects of the present utility model are further described in detail. It should be understood that the above are only specific embodiments of the present utility model, and are not used to limit the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An axial bypass on-off valve, comprising a cylinder block, a bushing, a left end cover, a right end cover, a piston, a piston rod, a solenoid valve and a magnetic switch, characterized in that: The left end cover and the right end cover are respectively connected to the left and right ends of the cylinder block through the bushing and fixed to the left and right ends of the cylinder block by bolts; The solenoid valve drives the piston to slide left and right in the inner cavity of the cylinder block through the magnetic switch and the magnetic ring. The piston is installed on the piston rod and drives the piston rod to slide left and right. The left and right ends of the piston rod respectively pass through the bushings at the left and right ends of the cylinder block and extend into the inner cavities of the left end cover and the right end cover; The solenoid valve and the magnetic switch are regularly installed and fixed on the outer surface of the cylinder block. The magnetic ring is nested on the outer surface of the piston. A piston seal is also nested on the outer surface of the piston. The piston is in contact and fits tightly with the inner wall of the cylinder block through the piston seal for sealing; The right end cover is regularly provided with a fluid inlet and a fluid outlet. The fluid inlet and the fluid outlet are communicated with the inner cavity of the right end cover to form a fluid channel; The piston rod is a tubular piston rod. The tubular piston rod and a support ring and a gasket are matched in the inner cavity of the right end cover to form a valve switch assembly. The support ring and the gasket are installed and fixed in the inner cavity of the right end cover. The outer surface of the support ring is in close fit with the inner cavity of the right end cover. The right end of the tubular piston rod passes through the bushing and extends into the support ring. The outer surface of the tubular piston rod is in close fit with the inner wall of the support ring. The right end face of the support ring is designed with an opening to form a water inlet, and a plurality of water outlets are regularly arranged on its side. The water inlet is communicated with the fluid inlet, and the plurality of water outlets converge and are communicated with the fluid outlet; The gasket is provided with a central opening and is installed at the water inlet on the right side of the support ring. The tubular piston rod moves to the right and extends into the support ring to contact and cooperate with the gasket to close the water inlet; The tubular piston rod moves to the left and separates from the gasket to open the water inlet, so as to form the fluid channel between the fluid inlet, the through hole of the support ring and the fluid outlet; Alternatively, the tubular piston rod forms a valve switch assembly in the inner cavity of the right end cover by directly cooperating with the support ring. The support ring is installed and fixed in the inner cavity of the right end cover. A second inner cavity is further provided in the inner cavity of the right end cover. The right end of the tubular piston rod passes through the support ring and extends into the second inner cavity. The outer surface of the tubular piston rod is in close contact with the inner wall of the second inner cavity. A support ring water inlet groove is provided on the right side end surface of the support ring, and support ring water outlet holes are regularly arranged on its side surface. The support ring water inlet groove is communicated with the fluid inlet, the support ring water outlet holes are communicated with the fluid outlet, and the support ring water inlet groove is communicated with the support ring water outlet holes. Regularly arranged piston rod water outlet holes are provided on the right side surface of the right end of the tubular piston rod. The tubular piston rod moves to the right to extend into the second inner cavity and is in close contact with the inner wall of the second inner cavity to close the piston rod water inlet. The piston rod moves to the left to communicate the piston rod water outlet holes and the support ring water inlet groove, thereby forming a fluid channel between the fluid inlet and the fluid outlet.

2. The axial bypass on-off valve according to claim 1, wherein: The bushing includes a cylinder body connection boss for being snapped into the inner cavity of the cylinder body and an end cover connection boss for being snapped into the inner cavity of the left end cover or the inner cavity of the right end cover. The cylinder body connection boss is snapped into the inner cavity of the cylinder body and is in close contact with its inner wall. The end cover connection boss is snapped into the inner cavity of the left end cover or the inner cavity of the right end cover and is in close contact with its inner wall.

3. The axial bypass on-off valve according to claim 2, wherein: The distance between the cylinder body connection boss and the end cover connection boss is smaller than the diameter of the bushing itself.

4. The axial bypass on-off valve according to claim 1, wherein: One or more sealing rings for sealing are regularly arranged between the bushing and the cylinder body, the left end cover, and the right end cover; one or more sealing rings for sealing are also regularly arranged between the outer surface of the piston rod and the inner walls of the left and right bushings.

5. An axial bypass on-off valve according to claim 1, characterized in that: On the side of the gasket facing the right side port of the piston rod, raised gasket bosses are regularly arranged. The right side port of the piston rod is designed with a cutting edge to form a piston rod right end cutting edge. A linear seal plus a surface gasket seal design is adopted between the piston rod right end cutting edge and the gasket bosses to achieve close contact and sealing between the piston rod right end cutting edge and the gasket bosses.

6. An axial bypass on-off valve according to any one of claims 1-5, characterized in that: A spring is provided between the piston and the bushing at the left end of the cylinder body.

7. The axial bypass on-off valve according to claim 6, wherein: The several water outlet holes on the side surface of the support ring are arranged by drilling holes around the side surface of the support ring and are evenly arranged in a circle on the side surface of the support ring.

8. The axial bypass on-off valve according to claim 7, characterized in that: A ring-shaped water outlet groove is also regularly arranged on the side surface of the support ring. The several water outlet holes are regularly arranged in the ring-shaped water outlet groove. The ring-shaped water outlet groove is communicated with the fluid outlet.

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