High-pressure-resistant axial bypass on-off valve

Abstract

The invention discloses a high-pressure-resistant 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. 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. Therefore, opening and closing of the valve can be easily controlled, and the valve can be applied to high-pressure fluid or ultrahigh-pressure fluid. A supporting ring and a sealing gasket are introduced to serve as a switch assembly of the valve, and through cooperation of the supporting ring and the sealing gasket, it can be ensured that the on-off valve stably operates in high-pressure or ultrahigh-pressure fluid. 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 invention relates to the technical field of valves, and in particular to a high-pressure resistant axial bypass on-off valve. Background Art

[0002] The axial bypass on-off valve is a switch valve in fluid control engineering. It adopts a pressure balance design to reduce resistance and quickly switch on and off. With the technological innovation of various industries, the market has higher and higher requirements for high pressure, low leakage, high speed and high frequency of fluids.

[0003] 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 on the axis.

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

[0006] 3. These defects are particularly prominent under high-pressure and ultra-high-pressure conditions, which not only affect the service life of the valve, but also cause production waste and even pose a safety hazard. Summary of the invention

[0007] The technical problem solved by the invention is to provide an axial bypass on-off valve which has a long service life and is resistant to high pressure and ultra-high pressure.

[0008] The technical solution adopted by the present invention to solve its technical problem is:

[0009] A high-pressure resistant axial bypass on-off valve comprises a cylinder body, a bushing, a left end cover, a right end cover, a piston, a piston rod, a solenoid valve and a magnetic switch, a support ring and a sealing gasket;

[0010] The bushing is installed in the left and right ports of the cylinder body to form left and right bushings, which respectively serve as connecting pieces between the left end cover and the right end cover and the cylinder body, and the outer surface of the bushing is tightly fitted with the inner wall of the left end cover, the cylinder body and the right end cover, and 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;

[0011] A left end cover inner cavity is regularly arranged on a side of the left end cover facing the cylinder body, and a right end cover inner cavity is regularly arranged on a side of the right end cover facing the cylinder body;

[0012] A piston seal and a magnetic ring are regularly installed on the outer surface of the piston, and the piston is slidably arranged in the inner cavity of the cylinder body through the piston seal, and the piston seal is tightly attached to and sealed with the inner wall of the inner cavity of the cylinder body; the solenoid valve drives the piston to slide left and right in the inner cavity of the cylinder body through the cooperation of the magnetic switch and the magnetic ring, and the piston is installed on the piston rod, and drives the piston rod to slide left and right;

[0013] The left and right ends of the piston rod pass through the left and right bushings respectively and are slidably arranged in the left and right bushings. The left end of the piston rod passes through the left bushing and extends into the inner cavity of the left end cover, and the right end of the piston rod passes through the right bushing and extends into the inner cavity of the right end cover. The outer surface of the piston rod is tightly fitted with the inner walls of the left and right bushings, and one or more sealing rings for sealing are regularly arranged therebetween.

[0014] The right end cover is also regularly provided with an inflow channel for facilitating the inflow of high-pressure fluid and an outflow channel for facilitating the outflow of the high-pressure fluid, and the inflow channel and the outflow channel are connected with the inner cavity of the right end cover, so as to form a high-pressure fluid channel between the inflow channel, the inner cavity of the right end cover and the outflow channel;

[0015] The support ring and the sealing gasket are installed and fixed in the inner cavity of the right end cover, and are pressed and fixed in the inner cavity of the right end cover by the right bushing, and the outer surface of the support ring is in close contact with the inner wall of the inner cavity of the right end cover;

[0016] The left and right end faces of the support ring are connected to form a support ring through hole, the opening of the right end face forms a support ring water inlet, and the side face is regularly perforated to form a plurality of support ring water outlets arranged in a circle, the support ring water inlet is connected to the inflow channel, the plurality of support ring water outlets are connected to the outflow channel, and the inflow channel on the right end cover is connected to the outflow channel through the support ring water inlet, the support ring through hole and the plurality of support ring water outlets in sequence;

[0017] The sealing gasket is arranged between the right end surface of the support ring and the inner cavity of the right end cover, and the middle opening of the sealing gasket is arranged to connect the inflow channel on the right end cover with the through hole of the support ring, thereby forming a water inlet;

[0018] The piston rod is a tubular piston rod, the right end of which passes through the right bushing and extends into the support ring through hole, and the right end of the tubular piston rod cooperates with the sealing gasket to form a switch assembly of the valve; the tubular piston rod moves to the right and extends into the support ring through hole to contact and seal with the sealing gasket to close the water inlet; the piston rod moves to the left to open the water inlet, thereby forming a fluid channel between the inlet channel, the support ring through hole and the outflow channel;

[0019] A pressure balance chamber is also provided in the inner cavity of the left end cover, and the left end of the tubular piston rod passes through the left bushing and extends into the pressure balance chamber, and moves in the pressure balance chamber.

[0020] Furthermore, water outlet grooves are regularly arranged on the support ring or on the inner wall of the inner cavity of the right end cover at the positions of the several support ring water outlets arranged around the circumference, and the support ring through hole is connected to the water outlet groove through the several support ring water outlets, and is connected to the outflow channel through the water outlet groove.

[0021] Preferably, the water outlet groove is regularly arranged on the periphery of the support ring to form a ring-shaped water outlet groove, and the plurality of water outlets are regularly arranged in a circle in the ring-shaped water outlet groove; the high-pressure fluid flows into the water outlet groove through the plurality of water outlets, and after converging in the water outlet groove, flows into the outflow channel on the right end cover.

[0022] Furthermore, a raised sealing gasket boss is regularly arranged on one side of the sealing gasket facing the direction of the support ring through hole, and the right end port of the piston rod adopts a cutting edge design to form a cutting edge at the right end of the piston rod, and a line seal plus surface sealing gasket design is adopted between the cutting edge at the right end of the piston rod and the sealing gasket boss to achieve a tight fit and seal between the cutting edge at the right end of the piston rod and the sealing gasket boss.

[0023] Furthermore, the diameter of the water inlet is larger than the diameter of the inflow channel, so that the opening of the sealing gasket is arranged away from the inflow channel.

[0024] Furthermore, a spring is arranged between the piston and the left bushing.

[0025] Furthermore, the bushing includes a cylinder connecting boss for snapping into the inner cavity of the cylinder body and an end cover connecting boss for snapping into the inner cavity of the left end cover or the inner cavity of the right end cover, the cylinder connecting boss is snapped into the inner cavity of the cylinder body and fits tightly with its inner wall, and the end cover connecting boss is snapped into the inner cavity of the left end cover or the inner cavity of the right end cover and fits tightly with its inner wall.

[0026] Furthermore, the inflow channel is horizontally arranged in the right end cover and passes through the right end of the right end cover to form a fluid inlet at the right end of the right end cover; the outflow channel is vertically arranged in the right end cover and passes through the lower end of the right end cover to form a fluid outlet at the lower end of the right end cover.

[0027] A novel high-pressure resistant axial bypass on-off valve comprises the above-mentioned cylinder body, bushing, left end cover, piston, piston seal, magnetic ring, spring, solenoid valve and magnetic switch, and also comprises a deformed right end cover, a deformed support ring and a deformed piston rod;

[0028] The deformed right end cover comprises a deformed right end cover inner cavity, the deformed right end cover inner cavity is arranged in steps, including an outer inner cavity of the right end cover and an inner inner cavity of the right end cover, the outer inner cavity of the right end cover serves as a mounting slot of the support ring, and is used to mount and fix the deformed support ring, the inner cavity of the right end cover has a smaller diameter than the outer inner cavity of the right end cover, and is regularly arranged on the inner side of the outer inner cavity of the right end cover;

[0029] The deformed piston rod is also a tubular piston rod, and its left and right end faces are connected to form a piston rod through hole. The right end face of the piston rod is opened to form a piston rod water inlet, and a plurality of piston rod water outlets are regularly arranged on the side of the right end, and the plurality of piston rod water outlets are also arranged in a circumferential pattern.

[0030] The deformed support ring is installed and fixed in the outer inner cavity of the right end cover, and its right end surface is regularly grooved to form a support ring water inlet groove, and its side surface is regularly opened to form a support ring water outlet. The support ring water inlet groove is arranged facing the inner cavity of the right end cover and is connected thereto, and the support ring water outlet is arranged facing the outflow channel and is connected thereto;

[0031] The left end of the deformed piston rod passes through the left bushing and extends into the pressure balance chamber, and the right end of the deformed piston rod passes through the right bushing and the support ring in turn and extends into the inner cavity of the right end cover, and is tightly fitted and sealed with the inner wall of the inner cavity of the right end cover, thereby cooperating with the inner cavity of the right end cover and the deformed support ring to form a switch assembly of the valve; the deformed piston rod moves to the right to drive the piston rod water outlet to move into the inner cavity of the right end cover to seal and close the piston rod water outlet; the piston rod moves to the left to drive the piston rod water outlet to move out of the inner cavity of the right end cover and communicate with the support ring water inlet groove to open the piston rod water outlet, thereby forming the fluid channel between the inflow channel, the piston rod through hole, the support ring water inlet groove and the outflow channel;

[0032] One or more sealing rings for sealing are also regularly arranged between the inner cavity of the right end cover and the outer surface of the right end of the piston rod.

[0033] Furthermore, the caliber of the inflow channel is smaller than the pore diameter of the inner cavity on the right end cover.

[0034] Furthermore, the diameter of the water outlet of the support ring is smaller than the diameter of the outflow channel.

[0035] Furthermore, the diameter of the water outlet of the piston rod is smaller than the depth of the water inlet groove of the support ring.

[0036] The beneficial effects of the present invention are:

[0037] 1. The present invention realizes pressure balance at the left and right ends of the piston rod by designing the piston rod into a tubular shape and setting a pressure balance chamber in the inner cavity of the left end cover. The high-pressure fluid acts on the outer wall of the piston rod to make it suspended, 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, so that the valve can be applied to high-pressure fluid or ultra-high-pressure fluid.

[0038] 2. The present invention introduces a support ring and a sealing gasket as the switch component of the valve. Through the cooperation of the support ring and the sealing gasket, the on-off valve can be ensured to operate stably in high-pressure or ultra-high-pressure fluids. The outer surface of the piston rod fits tightly 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 prevent the piston rod from being eccentric when sliding.

[0039] 3. When the piston rod of the on-off valve of the present invention is switched on and off, the high-pressure fluid will generate a huge impact force on the piston rod. By introducing the support ring, the eccentric vibration caused by the impact force of the high-pressure fluid can be corrected. At the same time, the wear of the bushing caused by the deadweight of the piston rod and the wear of the sealing ring between the bushing and the piston rod can be reduced, greatly reducing the risk of leakage.

[0040] 4. The present invention maintains the pressure balance of the tubular piston rod by setting up a pressure balance chamber. The sealing gasket matched with the piston rod is also surrounded by high-pressure fluid in front and behind, thus ensuring uniform force, avoiding instantaneous impact of high-pressure fluid, and solving the risk of explosion caused by instantaneous impact of high-pressure fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural schematic diagram of the present invention;

[0042] Figure 2 It is a schematic diagram of the external structure of the present invention;

[0043] Figure 3 for Figure 1 Split diagram of ;

[0044] Figure 4 for Figure 1 Structural diagram of some internal components;

[0045] Figure 5 for Figure 3 The structural diagram of some components on the right side of the middle;

[0046] Figure 6 for Figure 1 The valve closing state and fluid flow diagram in the figure;

[0047] Figure 7 for Figure 1 The valve opening state and fluid flow diagram in the figure;

[0048] Figure 8 It is a schematic diagram of another modified structure of the present invention;

[0049] Fig. 9 for Figure 8 Split diagram of ;

[0050] Fig.10 for Figure 8 Structural diagram of some internal components;

[0051] Fig.11 for Fig.10 Schematic diagram of the three-dimensional structure of the middle support ring;

[0052] Fig.12 for Figure 8 The valve closing state and fluid flow diagram in the figure;

[0053] Fig.13 for Figure 8 The valve opening state and fluid flow diagram in.

[0054] The markings in the figure are:

[0055] 1. Cylinder body; 101. Left chamber of the cylinder body; 102. Right chamber of the cylinder body;

[0056] 2. Bushing; 201. Cylinder body connecting boss; 202. End cover connecting boss;

[0057] 3. Left end cover; 301. Inner cavity of left end cover; 3011. Bushing slot; 3012. Pressure balance chamber;

[0058] 4. right end cover; 401. inner cavity of right end cover; 402. fluid inlet; 403. fluid outlet; 4021. inflow channel; 4031. outflow channel; 4011. outer inner cavity of right end cover; 4012. inner cavity of right end cover;

[0059] 5. Piston; 501. Piston seal;

[0060] 6. Piston rod; 601. Piston rod through hole; 602. Piston rod right end port; 603. Piston rod water outlet;

[0061] 7. Support ring; 701. Support ring through hole; 7011. Sealing pad slot; 702. Water inlet; 703. Water outlet; 704. Water outlet trough; 705. Support ring water inlet trough; 706. Support ring water outlet;

[0062] 8. Sealing gasket; 801. Sealing gasket boss;

[0063] 9. Spring; 10. Solenoid valve; 11. Muffler; 12. Magnetic ring; 13. Sealing ring; 14. Magnetic switch; 15. Stud. DETAILED DESCRIPTION

[0064] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0065] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0066] like Figure 1-Figure 7 As shown, the present invention provides a high-pressure resistant axial bypass on-off valve, including a cylinder body 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 sealing gasket 8, a spring 9, a solenoid valve 10 and a magnetic switch 14.

[0067] like Figure 1 As shown, the bushing 2 is installed and fixed at the left and right ends of the cylinder body 1 to form left and right bushings, which respectively serve as connectors and seals between the left and right end caps (i.e., the left end cap 3 and the right end cap 4) and the cylinder body 1, and as seals between the piston rod 6 and the left end cap 3, the cylinder body 1, and the right end cap 4. Among them, the left bushing is used to seal the left end cap 3 and the left end of the cylinder body 1, and the left end cap 3 is installed and fixed to the left end of the cylinder body 1 through the stud 15; the right bushing is used to seal the right end cap 4 and the right end of the cylinder body 1, and the right end cap 4 is installed and fixed to the right end of the cylinder body 1 through the stud.

[0068] Further, such as Figure 3 As shown, the bushing 2 includes a cylinder body connection boss 201 for fitting with the inner wall of the cylinder body and an end cover connection boss 202 for fitting with the inner wall of the left end cover or the right end cover. The cylinder body connection boss 201 is inserted into the inner cavity of the cylinder body and fits tightly with its inner wall; the end cover connection boss 202 is inserted 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 the left and right ends of the cylinder body 1, and the internal sealing treatment of the cylinder body 1, the left end cover 3 and the right end cover 4 is realized, forming a sealed environment inside.

[0069] Furthermore, the diameters of the cylinder body connecting boss 201 and the end cover connecting boss 202 are smaller than the diameter of the bushing itself, so that a baffle is formed between the cylinder body connecting boss and the end cover connecting boss to separate them. The baffle can be used to independently separate and seal the inner cavity of the cylinder body, thereby preventing the pressure source in the inner cavity of the cylinder body from leaking into the left end cover or the right end cover, and also preventing the high-pressure fluid in the inner cavity of the left end cover and the right end cover from leaking into the cylinder body.

[0070] Furthermore, one or more sealing rings 13 for sealing are disposed between the cylinder body 1 , the left end cover 3 , the right end cover 4 and the bushing 2 .

[0071] like Figure 3 As shown, in one embodiment, a sealing ring groove for installing the sealing ring 13 is regularly formed on the periphery of the cylinder body connecting boss 201 and the end cover connecting boss 202, and the sealing ring 13 is installed and fixed in the sealing ring groove on the periphery of the bushing 2.

[0072] Further, such as Figure 1 As shown, the left and right ends of the piston rod 6 pass through the left and right bushings respectively, 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.

[0073] Furthermore, a sealing ring 13 for sealing is also provided between the bushing 2 and the piston rod 6. The bushing 2 and the piston rod 6 are sealed by regularly providing one or more sealing ring grooves in the inner wall thereof and matching the sealing ring 13. The inner cavity of the left end cover, the inner cavity of the cylinder body and the inner cavity of the right end cover are sealed and isolated respectively by the sealing between the left and right bushings and the piston rod.

[0074] like Figure 1 As shown, the piston 5 is fixed on the piston rod 6 to drive the piston rod 6 to slide in the left and right bushings. The piston 5 is provided with a piston seal groove on its periphery and matched with a piston seal 501. The piston 5 contacts the inner wall of the cylinder 1 through the piston seal 501, thereby dividing the inner cavity of the cylinder 1 into two through the piston seal 501, forming the left and right chambers of the cylinder (i.e., the left chamber 101 of the cylinder and the right chamber 102 of the cylinder).

[0075] Furthermore, the solenoid valve 10 is fixedly mounted on the cylinder body 1 and communicates with the left and right chambers of the cylinder body through the air inlet holes on the cylinder body 1. Thus, the pressure source is delivered or released to the left and right chambers of the cylinder body through the solenoid valve to control the piston 5 to slide left and right in the inner cavity of the cylinder body 1, and finally drives the piston rod 6 to slide left and right in the inner cavity of the cylinder body 1.

[0076] like Figure 1 and 2As shown, the periphery of the piston 5 is also provided with a magnetic ring groove, and a matching magnetic ring 12 is installed. A magnetic switch 14 is installed on the outer surface of the cylinder body 1 and the left end cover 3, and the outer surface of the cylinder body 1 and the right end cover 4. The magnetic switch 14 transmits signals with the magnetic ring 12, and the electromagnetic valve 10 controls the movement of the piston 5 by cooperating with the magnetic switch and the magnetic ring.

[0077] Further, such as Figure 1 As shown, a spring 9 is also provided between the piston 5 and the left bushing. Figure 1 The middle is the initial state of the on-off valve (i.e., the valve closed state). The spring 9 provides the piston 5 with a rightward elastic force 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 the sealing gasket 8, thereby closing the water inlet and outlet on the support ring 7 to close the valve.

[0078] Further, such as Figure 3 As shown, the right end cover 4 is regularly provided with a right end cover inner cavity 401, a fluid inlet 402 and a fluid outlet 403. The fluid inlet 402 and the fluid outlet 403 are respectively connected with the right end cover inner cavity 401, and 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.

[0079] 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 connecting boss 202 of the right bushing. The outer surface of the support ring 7 contacts and fits tightly with the inner wall of the right end cover inner cavity 401.

[0080] Furthermore, the support ring 7 and the sealing gasket 8 cooperate to serve as a switch component of the valve. The fluid inlet 402 is connected to the fluid outlet 401 through the support ring 7 and the sealing gasket 8 .

[0081] In the high-pressure resistant axial bypass on-off valve of the present invention, the fluid inlet 402 and the fluid outlet 403 are arranged on the same side end, that is, on the right end cover, thereby forming an axial bypass on-off valve.

[0082] like Figure 3 As shown, in one embodiment, the left end of the right end cover 4 is grooved inward to form a 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 connecting 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 connecting 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.

[0083] Furthermore, the support ring 7 is installed and fixed in the inner cavity 401 of the right end cover, and on the one hand, it serves as a switch component between the inflow channel 4021 and the outflow channel 4031, and on the other hand, it serves as a support component for the piston rod 6.

[0084] like Figure 3-Figure 5 As shown, the left and right end faces of the support ring 7 are through-set to form a support ring through hole 701 for the piston rod 6 to pass through. The aperture of the support ring through hole 701 is consistent with the aperture of the bushing 2, so that the piston rod 6 can be closely contacted and fitted 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.

[0085] Furthermore, the piston rod 6 extends into the support ring through hole 701, slides left and right in the support ring through hole 701, and is slidably arranged in the support ring 7. 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 member for the piston rod 6, can ensure that the piston rod 6 slides stably in the left and right bushings, and prevents the piston rod from being eccentric when sliding.

[0086] Further, such as Figure 4 and Figure 5 As shown, the right end surface of the support ring through hole 701 is grooved inwardly to form a sealing gasket clamping groove 7011 for mounting the sealing gasket 8, and the sealing gasket 8 is mounted and fixed in the sealing gasket clamping groove 7011. When the support ring 7 is mounted and fixed in the inner cavity 401 of the right end cover, the end cover connecting boss at the right end of the right bushing presses the support ring 7 and the sealing gasket 8, thereby pressing and fixing the sealing gasket 8 in the sealing gasket clamping groove 7011 and the inner cavity 401 of the right end cover to prevent the sealing gasket 8 from falling off.

[0087] Further, such as Figure 5 As shown, the left and right end surfaces of the sealing gasket 8 are provided with through openings, thereby opening the inflow channel 4021 and the support ring through hole 701, forming a water inlet 702 for facilitating the inflow of high-pressure fluid. 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 sealing gasket.

[0088] Furthermore, in order to allow the high-pressure fluid to flow out of the fluid outlet 403, a plurality of water outlets 703 are regularly arranged on the periphery of the support ring 7. The plurality of water outlets are arranged around the side of the support ring 7 by perforating, so as to be evenly arranged around the circumference of the support ring, and penetrate the inner wall of the support ring to communicate with the support ring through hole 701 inside the support ring, so as to form a channel between the water inlet 701 and the water outlet 703 for the flow of high-pressure fluid.

[0089] Further, such as Figure 3 and Figure 4As shown, the periphery of the support ring 7 is also regularly provided with an annular water outlet groove 704 that is recessed inward. A plurality of water outlets 703 are regularly arranged in the annular water outlet groove 704 and are arranged around the annular water outlet groove 704. The present invention arranges a plurality of water outlets 703 around the annular water outlet groove 704, so that the high-pressure fluid in the support ring through hole 701 can be radially ejected through the plurality of annularly arranged water outlets and converge into the annular water outlet groove 704. Then, the fluid flows into the outflow channel 4031 through the annular water outlet groove 704, and finally flows out from the fluid outlet 403 on the right end cover.

[0090] At the same time, the even distribution of the circumferences of the plurality of water outlets 703 can ensure uniform water discharge and ensure that the fluid pressure on the circumferences of the inner walls of the support ring 7 and the piston rod 6 is balanced.

[0091] like Figure 5 As shown, a raised sealing pad boss 801 is provided on the left side of the sealing pad 8 along the direction of the support ring through hole 701. The left and right end surfaces of the sealing pad 8 are provided with through holes to form a sealing pad through hole, and the sealing pad through hole penetrates the sealing pad boss 801, thereby opening up the sealing pad 8 and forming a water inlet 702 in the middle thereof.

[0092] Further, such as Figure 4 As shown, the piston rod 6 is a tubular piston rod, and the left and right end surfaces thereof are penetrated with openings to form a piston rod through hole 601. The right end of the piston rod 6 is a piston rod right port 602, and the piston rod right port 602 is designed with a cutting edge. The cutting edge of the right end of the piston rod cooperates with the sealing pad boss 801 to seal, thereby sealing and closing the water inlet 701 to close the valve.

[0093] Furthermore, a line seal plus a surface seal design is adopted between the piston rod 6 and the sealing gasket 8. The sealing gasket 8 adopts a centrally-through structure, which can be sealed with the piston rod and communicated with the inner wall of the piston rod.

[0094] like Figure 3 As shown, the left end cap is regularly provided with a left end cap inner cavity 301, which is a stepped inner cavity, divided into an outer inner cavity and an inner inner cavity, and the inner inner cavity is smaller in diameter than the outer inner cavity, so it is stepped inside the outer inner cavity. The outer inner cavity is used as a bushing slot 3011 for the end cap to connect the boss 202; and the inner inner cavity is used as a pressure balance cavity 3012 for balancing the pressure at the left and right ends of the piston rod 6.

[0095] Furthermore, the left end of the piston rod 6 extends through the left bushing into the pressure balance chamber 3012, and the right end of the piston rod extends through the right bushing into the support ring through hole 701 of the support ring. The pressure balance chamber 3012 is connected with the support ring through hole 701 through the piston rod through hole 601.

[0096] like Figure 6 and Figure 7 As shown, there is a switch schematic diagram, a fluid flow diagram and a working principle diagram of the high-pressure resistant axial bypass on-off valve of the present invention.

[0097] like Figure 6 and Figure 4 The diagrams shown are the initial state and the closed state of the valve. In the initial state of the valve, the spring 9 provides the piston 5 with a rightward elastic force, driving the piston 5 to slide to the right, and the piston 5 drives the piston rod 6 to slide to the right. The piston rod 6 slides in the left and right bushings and the support ring 7, and the right end edge of the piston rod 6 contacts the boss of the sealing gasket 8 to seal tightly, thereby closing the high-pressure fluid channel between the water inlet 702 and the water outlet 703.

[0098] After the valve is activated, the solenoid valve delivers high-pressure fluid to the left chamber 101 of the cylinder body to increase the pressure in the left chamber of the cylinder body, thereby driving the piston 5 to move rightward, and the piston 5 drives the piston rod 6 to press the sealing gasket 8 to the right. At this time, the high-pressure fluid flows in from the fluid inlet 402, passes through the inlet channel 4021 and the water inlet 702, enters the piston rod through hole 601, and then flows into the pressure balance chamber 3012 in the left end cover 3 through the piston rod through hole 601.

[0099] Because the fluid flowing into the pressure balance chamber 3012 is also a high-pressure fluid, the pressure balance chamber 3012 is also in a high-pressure state. In this way, both the left and right ends of the piston rod 6 are in high-pressure fluid. In addition, because the piston rod 6 adopts a through-tube design and is a tubular piston rod, the cross-sectional force-bearing area of ​​the left and right ends is very small, so 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.

[0100] Furthermore, the high-pressure fluid acts on the outer wall of the piston rod, so that the piston rod is in a suspended state. At the same time, due to the fluid pressure, the movement resistance of the piston rod can be reduced to a minimum, 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 tightly fitted 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.

[0101] like Figure 7As shown, it is the opening state diagram of the valve and the fluid flow diagram. Because the left and right ends of the piston rod 6 are balanced, and the high-pressure fluid acts on the outer wall of the piston rod, so that the piston rod is in a suspended state, and its movement resistance can be reduced to a 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 separate from the sealing 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 flows into the support ring through hole 701. The high-pressure fluid in the support ring through hole 701 is sprayed to the surroundings through a number of water outlets 703 evenly arranged around the circumference, thereby flowing into the annular water outlet groove 704, and 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.

[0102] At the moment of opening and closing the piston rod 6 of the on-off valve of the present invention, 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 reduce the wear of the bushing 2 caused by the deadweight of the piston rod, and reduce the wear of the sealing ring between the bushing and the piston rod, greatly reducing the risk of leakage.

[0103] At the same time, when the high-pressure fluid passes through the sealing gasket 8, the right end edge of the piston rod 6 hits the sealing gasket 8, and the sealing gasket 8 will vibrate. Because the sealing gasket 8 is surrounded by high-pressure fluid in front and behind, it is guaranteed that the force is evenly applied, which can avoid the instantaneous impact of the fluid and solve the risk of explosion caused by the instantaneous impact of the high-pressure fluid.

[0104] like Figure 8-13 As shown, based on the above-mentioned deformation design of the high-pressure resistant axial bypass on-off valve, the present invention also provides a new type of high-pressure resistant axial bypass on-off valve, including a cylinder body 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 sealing gasket 8 is omitted, and the piston rod 6, the support ring 7 and the right end cover 4 are deformed, and the other structural components remain unchanged.

[0105] Further, such as Fig. 9 As shown, the right end cap inner cavity 401 on the left side of the right end cap 4 adopts a stepped inner cavity, including a right end cap outer inner cavity 4011 and a right end cap inner inner cavity 4012. Among them, the diameter of the right end cap inner inner cavity 4012 is smaller than the diameter of the right end cap outer inner cavity 4011, and is regularly arranged on the inner side of the right end cap outer inner cavity.

[0106] Furthermore, the outer inner cavity 4011 of the right end cover serves as a slot for the support ring 7. The support ring 7 is inserted and installed in the outer inner cavity of the right end cover, and is pressed and fixed by the end cover connecting boss 202 on the right bushing.

[0107] Furthermore, the right end of the piston rod 6 passes through the right bushing 2 and the support ring 7 in sequence and extends into the inner cavity 4012 on the right end cover.

[0108] Furthermore, the outer surface of the piston rod 6 is closely fitted with the inner wall of the inner cavity 4012 of the right end cover, and a sealing ring is regularly arranged for sealing. In one embodiment, a sealing ring groove is provided 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 achieve the sealing treatment between the piston rod 6 and the inner cavity 4012 of the right end cover.

[0109] Furthermore, 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 .

[0110] like Fig.10 As shown, the piston rod 6 is a tubular piston rod, and its left and right end faces are provided with through openings to form a piston rod through hole 601. In this example, the openings at the left and right ends of the piston rod have the same diameter, so that the pressure difference at the left and right ends of the piston rod can be eliminated as much as possible to balance the pressure.

[0111] Furthermore, the right end of the piston rod serves as a water inlet and is connected to the inner cavity 4012 of the right end cover, and a plurality of piston rod water outlets 603 are regularly arranged on the right end side surface, and the plurality of piston rod water outlets 603 are connected to the water inlet at the 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 circle and are arranged around the right end side surface of the piston rod.

[0112] Further, such as Fig.10 and Fig.11 As shown, in this embodiment, the right end surface of the support ring 7 is grooved to form a support ring water inlet groove 705, and its side is also opened to form a support ring water outlet 706. The support ring water inlet groove 705 is connected with the support ring water outlet 706 to form a support ring flow channel. The support ring water inlet groove 705 is arranged facing the inner cavity 4011 of the right end cover and is connected thereto; the support ring water outlet 706 is arranged facing the lower end of the right end cover and is connected to the outflow channel 4031 at the lower end of the right end cover.

[0113] Furthermore, the right end of the piston rod 6 passes through the support ring 7 and is slidably disposed in the support ring 7. The outer surface of the piston rod is closely fitted with the inner wall of the support ring 7. Therefore, the piston rod 6 serves as a switch component of the support annular flow channel, thereby controlling the opening and closing of the valve.

[0114] like Fig.12 and Fig.13 As shown, there is a switch schematic diagram, a fluid flow diagram and a working principle diagram of the new axial bypass on-off valve of the present invention.

[0115] like Fig.12 As shown, there are diagrams of the initial state and the closed state of the new axial bypass on-off valve of the present invention.

[0116] 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 the several piston rod water outlets on the side of the right end into the inner cavity of the right end cover, so that the several piston rod water outlets 603 are sealed and closed through the inner wall and sealing ring of the inner cavity 4012 of the right end cover, 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 chamber 3012 of the left end cover through the piston rod through hole 601, thereby achieving pressure balance at the left and right ends of the piston rod.

[0117] After the valve is started, the solenoid valve increases the pressure in the left chamber 101 of the cylinder body, and the pressure in the left chamber of the cylinder body will keep the piston rod 6 in the closed state. When the solenoid valve releases the pressure in the left chamber 101 of the cylinder body and adds a pressure source to the right chamber 102 of the cylinder body, the pressure in the right chamber of the cylinder body 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 the several piston rod water outlets 603 on the right side of the piston rod are connected 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 from the inflow channel 4021 into the piston rod through hole 601, and flows into the support ring water inlet groove 705 of the support ring through the several 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.

[0118] In this structure, during the operation of the valve, both ends of the piston rod 6 are continuously restricted by the inner walls of the left and right end caps, thereby preventing the piston rod from vibrating and eccentrically due to fluid impact. At the same time, the sealing ring on the inner cavity of the right end cap can reduce the risk of medium leakage.

[0119] The water inlet and water outlet mentioned above 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.

[0120] The above specific embodiments further illustrate the purpose, 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 protection scope of the present invention.

Claims

1. A high-pressure resistant axial bypass on-off valve, comprising a cylinder body, 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: Also included are a support ring and a sealing gasket; The bushing is installed in the left and right ports of the cylinder body to form left and right bushings, which respectively serve as connecting pieces between the left end cover and the right end cover and the cylinder body, and the outer surface of the bushing is tightly fitted with the inner wall of the left end cover, the cylinder body and the right end cover, and 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; A left end cover inner cavity is regularly arranged on a side of the left end cover facing the cylinder body, and a right end cover inner cavity is regularly arranged on a side of the right end cover facing the cylinder body; A piston seal and a magnetic ring are regularly installed on the outer surface of the piston, and the piston is slidably arranged in the inner cavity of the cylinder body through the piston seal, and the piston seal is tightly attached to and sealed with the inner wall of the inner cavity of the cylinder body; the solenoid valve drives the piston to slide left and right in the inner cavity of the cylinder body through the cooperation of the magnetic switch and the magnetic ring, and 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 pass through the left and right bushings respectively and are slidably arranged in the left and right bushings. The left end of the piston rod passes through the left bushing and extends into the inner cavity of the left end cover, and the right end of the piston rod passes through the right bushing and extends into the inner cavity of the right end cover. The outer surface of the piston rod is tightly fitted with the inner walls of the left and right bushings, and one or more sealing rings for sealing are regularly arranged therebetween. The right end cover is also regularly provided with an inflow channel for facilitating the inflow of high-pressure fluid and an outflow channel for facilitating the outflow of the high-pressure fluid, and the inflow channel and the outflow channel are connected with the inner cavity of the right end cover, so as to form a high-pressure fluid channel between the inflow channel, the inner cavity of the right end cover and the outflow channel; The support ring and the sealing gasket are installed and fixed in the inner cavity of the right end cover, and are pressed and fixed in the inner cavity of the right end cover by the right bushing, and the outer surface of the support ring is in close contact with the inner wall of the inner cavity of the right end cover; The left and right end faces of the support ring are connected to form a support ring through hole, the opening of the right end face forms a support ring water inlet, and the side face is regularly perforated to form a plurality of support ring water outlets arranged in a circle, the support ring water inlet is connected to the inflow channel, the plurality of support ring water outlets are connected to the outflow channel, and the inflow channel on the right end cover is connected to the outflow channel through the support ring water inlet, the support ring through hole and the plurality of support ring water outlets in sequence; The sealing gasket is arranged between the right end surface of the support ring and the inner cavity of the right end cover, and the middle opening of the sealing gasket is arranged to connect the inflow channel on the right end cover with the through hole of the support ring, thereby forming a water inlet; The piston rod is a tubular piston rod, the right end of which passes through the right bushing and extends into the support ring through hole, and the right end of the tubular piston rod cooperates with the sealing gasket to form a switch assembly of the valve; the tubular piston rod moves to the right and extends into the support ring through hole to contact and seal with the sealing gasket to close the water inlet; the piston rod moves to the left to open the water inlet, thereby forming a fluid channel between the inlet channel, the support ring through hole and the outflow channel; A pressure balance chamber is also provided in the inner cavity of the left end cover, and the left end of the tubular piston rod passes through the left bushing and extends into the pressure balance chamber, and moves in the pressure balance chamber.

2. A high pressure resistant axial bypass on-off valve according to claim 1, characterized in that: Water outlet grooves are regularly arranged on the support ring or on the inner wall of the inner cavity of the right end cover at the positions of the several support ring water outlets arranged in the circumference. The support ring through hole is connected with the water outlet groove through the several support ring water outlets, and is connected with the outflow channel through the water outlet groove.

3. A high pressure resistant axial bypass on-off valve as claimed in claim 2, characterized in that: The water outlet groove is regularly arranged on the periphery of the support ring to form a ring-shaped water outlet groove, and the plurality of water outlets are regularly arranged in a circle in the ring-shaped water outlet groove; the high-pressure fluid flows into the water outlet groove through the plurality of water outlets, and after converging in the water outlet groove, flows into the outflow channel on the right end cover.

4. A high pressure resistant axial bypass on-off valve according to claim 1, characterized in that: A raised sealing pad boss is regularly arranged on one side of the sealing pad facing the direction of the support ring through hole, and the right end port of the piston rod adopts a cutting edge design to form a cutting edge at the right end of the piston rod, and a line seal plus surface sealing pad design is adopted between the cutting edge at the right end of the piston rod and the sealing pad boss to achieve a tight fit and seal between the cutting edge at the right end of the piston rod and the sealing pad boss.

5. The high-pressure resistant axial bypass on-off valve according to claim 1, characterized in that: The diameter of the water inlet is larger than the diameter of the inflow channel, so that the opening of the sealing gasket is arranged away from the inflow channel.

6. A high pressure resistant axial bypass on-off valve according to any one of claims 1 to 4, characterized in that: A spring is also arranged between the piston and the left bushing.

7. A high pressure resistant axial bypass on-off valve according to claim 6, characterized in that: The bushing includes a cylinder connecting boss for snapping into the inner cavity of the cylinder body and an end cover connecting boss for snapping into the inner cavity of the left end cover or the inner cavity of the right end cover. The cylinder connecting boss is snapped into the inner cavity of the cylinder body and fits tightly with its inner wall, and the end cover connecting boss is snapped into the inner cavity of the left end cover or the inner cavity of the right end cover and fits tightly with its inner wall.

8. A high pressure resistant axial bypass on-off valve as claimed in claim 6, characterized in that: The inflow channel is horizontally arranged in the right end cover and passes through the right end of the right end cover to form a fluid inlet at the right end of the right end cover; the outflow channel is vertically arranged in the right end cover and passes through the lower end of the right end cover to form a fluid outlet at the lower end of the right end cover.

9. A novel high-pressure resistant axial bypass on-off valve, comprising a cylinder body, a bushing, a left end cover, a piston, a piston seal, a magnetic ring, a spring, a solenoid valve and a magnetic switch as described in claim 1, characterized in that: Also included are a deformed right end cap, a deformed support ring, and a deformed piston rod; The deformed right end cover comprises a deformed right end cover inner cavity, the deformed right end cover inner cavity is arranged in steps, including an outer inner cavity of the right end cover and an inner inner cavity of the right end cover, the outer inner cavity of the right end cover serves as a mounting slot of the support ring, and is used to mount and fix the deformed support ring, the inner cavity of the right end cover has a smaller diameter than the outer inner cavity of the right end cover, and is regularly arranged on the inner side of the outer inner cavity of the right end cover; The deformed piston rod is also a tubular piston rod, and its left and right end faces are connected to form a piston rod through hole. The right end face of the piston rod is opened to form a piston rod water inlet, and a plurality of piston rod water outlets are regularly arranged on the side of the right end, and the plurality of piston rod water outlets are also arranged in a circumferential pattern. The deformed support ring is installed and fixed in the outer inner cavity of the right end cover, and its right end surface is regularly grooved to form a support ring water inlet groove, and its side surface is regularly opened to form a support ring water outlet. The support ring water inlet groove is arranged facing the inner cavity of the right end cover and is connected thereto, and the support ring water outlet is arranged facing the outflow channel and is connected thereto; The left end of the deformed piston rod passes through the left bushing and extends into the pressure balance chamber, and the right end of the deformed piston rod passes through the right bushing and the support ring in turn and extends into the inner cavity of the right end cover, and is tightly fitted and sealed with the inner wall of the inner cavity of the right end cover, thereby cooperating with the inner cavity of the right end cover and the deformed support ring to form a switch assembly of the valve; the deformed piston rod moves to the right to drive the piston rod water outlet to move into the inner cavity of the right end cover to seal and close the piston rod water outlet; the piston rod moves to the left to drive the piston rod water outlet to move out of the inner cavity of the right end cover and communicate with the support ring water inlet groove to open the piston rod water outlet, thereby forming the fluid channel between the inflow channel, the piston rod through hole, the support ring water inlet groove and the outflow channel; One or more sealing rings for sealing are also regularly arranged between the inner cavity of the right end cover and the outer surface of the right end of the piston rod.

10. A high pressure resistant axial bypass on-off valve according to claim 7, characterized in that: The caliber of the inflow channel is smaller than the aperture of the inner cavity inside the right end cover; the caliber of the support ring water outlet is smaller than the caliber of the outflow channel; the caliber of the piston rod water outlet is smaller than the depth of the support ring water inlet groove.

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