High-pressure straight-through valve

Abstract

Disclosed is a high-pressure straight-through valve, comprising a valve body (14) and a movable valve stem (4) arranged in the valve body (14), wherein first sealing members (6) are respectively provided between an upper portion of the movable valve stem (4) and a bushing (5) as well as between the lower end of the movable valve stem (4) and the valve body (14); a first balance groove (4a) and a second balance groove (4b) are annularly provided on the movable valve stem (4) between the two first sealing members (6); and two force-bearing surfaces which are arranged opposite each other and have the same axial projection area are respectively formed on an upper side surface of the first balance groove (4a) and a lower side surface of the second balance groove (4b). The two force-bearing surfaces have the same axial projection area; and after the movable valve stem (4) is sealed, a high-pressure fluid can only act on the movable valve stem (4) by means of the two force-bearing surfaces (s), thereby ensuring that pressure exerted on the movable valve stem (4) is the same in two directions to achieve a self-balancing effect, ensuring that the movable valve stem (4) itself is not affected by the pressure of the high-pressure fluid, and thus achieving enhanced adaptability to high-pressure fluids.

Description

A high-pressure straight-through valve Technical Field

[0001] This application relates to the field of fluid control technology, specifically to a high-pressure straight-through valve. Background Technology

[0002] A high-pressure straight-through valve is an automatic valve powered by electromagnetic force. It utilizes the electromagnetic force generated when the solenoid coil is energized to drive the movement of related parts, thus achieving opening, closing, or switching functions. It is widely used in various fields such as metallurgy, petrochemicals, pharmaceuticals, food, medical, and textiles.

[0003] Currently, existing high-pressure straight-through valves are not well-suited to high-pressure environments, meaning that high-pressure fluids exert enormous pressure on the moving valve stem. If the valve lacks a self-balancing mechanism, this pressure will cause a difference in fluid pressure at both ends of the moving valve stem, resulting in excessive force on one side of the moving valve stem. Consequently, the switching force applied by the solenoid coil / spring is insufficient to counteract this force, causing the valve to fail to open or close properly. Summary of the Invention

[0004] This application provides a high-pressure straight-through valve that can achieve pressure self-balancing, thereby effectively overcoming the technical problem in the prior art where excessive force on the moving valve stem in one direction causes the valve to fail to open and close normally.

[0005] To achieve the above objectives, the technical solution of this application is as follows:

[0006] A high-pressure straight-through valve includes a valve body and a moving valve stem. A mounting cavity extending through the upper and lower ends of the valve body is formed at its center. The moving valve stem passes through the mounting cavity. The valve body has a fluid inlet and two fluid outlets communicating with the mounting cavity. A bushing, an upper support sleeve, an upper inner valve seat, an intermediate support sleeve, a lower inner valve seat, and a lower support sleeve are sequentially fitted onto the moving valve stem in the mounting cavity from top to bottom. First sealing elements are provided between the upper part of the moving valve stem and the bushing, and between the lower end of the moving valve stem and the valve body. A first balancing element is circumferentially formed on the moving valve stem between the two first sealing elements. The first and second balance grooves form a sealing protrusion on the moving valve stem between the first and second balance grooves, which seals with the upper and lower inner valve seats. The inlet end of the fluid inlet communicates with the mounting cavity at the sealing protrusion through a through hole opened in the intermediate support sleeve. Two opposing force-bearing surfaces with the same axial projected area are formed on the upper surface of the first balance groove and the lower surface of the second balance groove. The inlet end of one fluid outlet is connected to the first balance groove through a through hole opened in the upper support sleeve, and the inlet section of the other fluid outlet is connected to the second balance groove through a through hole opened in the lower support sleeve.

[0007] Furthermore, a bottom sealing seat is installed at the bottom of the mounting cavity, an electromagnetic coil is fixed at the top of the valve body, the upper part of the moving valve stem extends into the electromagnetic coil, a support step is formed at the upper part of the moving valve stem, a spring is fitted on the moving valve stem above the support step, a fixed valve stem is provided in the electromagnetic coil above the moving valve stem, the upper end of the fixed valve stem is fixed by a valve cover, the two ends of the spring abut between the support step and the lower end face of the fixed valve stem, and a wire is electrically connected to the top of the electromagnetic coil.

[0008] Furthermore, the inner wall of the intermediate support sleeve is formed with a groove that corresponds to the sealing protrusion.

[0009] Furthermore, the axial cross-section of the groove is C-shaped.

[0010] Furthermore, the location of the fluid inlet is adapted to the location of the sealing protrusion, and the locations of the two fluid outlets are adapted to the locations of the first balance groove and the second balance groove, respectively.

[0011] Furthermore, anti-slip pipes are installed in both the fluid inlet and the fluid outlet, and the inner ends of the anti-slip pipes extend into the through holes opened in the upper support sleeve, the middle support sleeve, and the lower support sleeve.

[0012] Furthermore, the axial cross-sections of both the first and second balancing grooves are C-shaped.

[0013] Furthermore, a second sealing element is provided between the upper inner valve seat, the lower inner valve seat, and the valve body.

[0014] Furthermore, the second seal is a Glyd ring.

[0015] Furthermore, the first seal is an O-ring. Beneficial effects:

[0016] The high-pressure straight-through valve described in this application seals the upper and lower ends of the moving valve stem with a first sealing element and a sliding sleeve, allowing high-pressure fluid to apply pressure to only one end of the moving valve stem in one direction. Simultaneously, through two force-bearing surfaces with identical structural and axial projection areas, the high-pressure fluid acts on the moving valve stem only through these two force-bearing surfaces after it is sealed, ensuring that the pressure on the moving valve stem is the same in both directions, achieving a self-balancing effect. This ensures that the moving valve stem itself is not affected by the pressure of the high-pressure fluid, thus avoiding the phenomenon where excessive force on one side of the moving valve stem prevents the switching force applied by the electromagnetic coil / spring from being insufficient to offset the pressure, resulting in the valve failing to open or close properly. This design offers greater adaptability to high-pressure fluids. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the structure of this application;

[0018] Figure 2 is a cross-sectional view AA of Figure 1. Detailed Implementation

[0019] The present application will be further described below with reference to the embodiments and accompanying drawings.

[0020] As shown in Figures 1 and 2, this embodiment proposes a high-pressure straight-through valve, including a valve cover 1, a fixed valve stem 2, a spring 3, a moving valve stem 4, a bushing 5, a bottom sealing seat 13, a valve body 14, an electromagnetic coil 19, and a wire 20. A mounting cavity penetrating both the upper and lower ends of the valve body 14 is formed in the center of the valve body 14. The bottom sealing seat 13 is installed at the bottom of the mounting cavity. The moving valve stem 4, within the mounting cavity, is fitted sequentially from top to bottom with the bushing 5, an upper support sleeve 18, an upper inner valve seat 8, a middle support sleeve 9, a lower inner valve seat 11, and a lower support sleeve 15. The upper part of the moving valve stem 4 is positioned between the bushing 5 and the bushing 5, and the lower end of the moving valve stem 4 is positioned between the valve body 14 and the valve body 14. Each valve body 14 is equipped with a first sealing element 6. An electromagnetic coil 19 is fixed on the top of the valve body 14. The upper part of the moving valve stem 4 extends into the electromagnetic coil 19. A support step is formed on the upper part of the moving valve stem 4. A spring 3 is fitted on the moving valve stem 4 above the support step. A fixed valve stem 2 is provided in the electromagnetic coil 19 above the moving valve stem. The upper end of the fixed valve stem 2 is fixed by the valve cover 1. The two ends of the spring 3 abut between the support step and the lower end face of the fixed valve stem 2. A wire 20 is electrically connected to the top of the electromagnetic coil 19. A fluid inlet 16 and two fluid outlets 7 communicating with the mounting cavity are provided on the valve body 14.

[0021] In this example, the upper support sleeve 18, the upper inner valve seat 8, the middle support sleeve 9, the lower inner valve seat 11, and the lower support sleeve 15 have the same inner and outer diameters, so that the solenoid valve is not affected by fluid pressure during the entire movement process, but is only affected by electromagnetic force and return spring force, ensuring that the solenoid valve can open and close normally under the action of spring force and electromagnetic force, thereby achieving high pressure or even ultra-high pressure.

[0022] Preferably, the upper support sleeve 18, upper inner valve seat 8, intermediate support sleeve 9, lower inner valve seat 11, and lower support sleeve 15 are all made of PEEK material, and the PEEK material used for the upper inner valve seat 8 and lower inner valve seat 11 is of higher specification. Therefore, the above-mentioned split structure can ensure the machinability of the upper inner valve seat 8 and lower inner valve seat 11, making them stress-free and wear-resistant, and can also ensure the convenience of processing.

[0023] In this example, anti-rotation pipes 17 are installed in both the fluid inlet 16 and the fluid outlet 7. The inner ends of the anti-rotation pipes 17 extend into the through holes opened in the upper support sleeve 18, the middle support sleeve 9, and the lower support sleeve 15. By setting the anti-rotation pipes 17, the upper support sleeve 18, the middle support sleeve 9, and the lower support sleeve 15 can be prevented from rotating and blocking the inlet end of the fluid inlet 16 or the fluid outlet 7 during the entire movement of the solenoid valve, thus ensuring that the solenoid valve can open and close normally.

[0024] In this embodiment, a second sealing element 10 is provided between the upper inner valve seat 8, the lower inner valve seat 11, and the valve body 14. A first balance groove 4a and a second balance groove 4b are circumferentially formed on the moving valve stem 4 between the two first sealing elements 6. A sealing protrusion 4c is formed on the moving valve stem 4 between the first balance groove 4a and the second balance groove 4b to seal against the upper inner valve seat 8 and the lower inner valve seat 11. After the moving valve stem 4 moves up or down, it can achieve the sealing cooperation between the sealing protrusion 4c and the upper inner valve seat 8 and the lower inner valve seat 11, thus realizing the fluid inlet 16 and The on / off control between the two fluid outlets 7 is achieved by connecting the inlet end of the fluid inlet 16 to the mounting cavity at the sealing protrusion 4c via a through hole opened in the intermediate support sleeve 9. Two opposing force-bearing surfaces s with the same axial projection area are formed on the upper surface of the first balance groove 4a and the lower surface of the second balance groove 4b. The inlet end of one fluid outlet 7 is connected to the first balance groove 4a via a through hole opened in the upper support sleeve 18, and the inlet end of the other fluid outlet 7 is connected to the second balance groove 4b via a through hole opened in the lower support sleeve 15.

[0025] By using two force-bearing surfaces s, the high-pressure fluid can only act on the moving valve stem 4 through the two force-bearing surfaces after it is sealed. This ensures that the pressure on the moving valve stem 4 is the same in both directions, achieving a self-balancing effect. This ensures that the moving valve stem 4 itself is not affected by the pressure of the high-pressure fluid, thereby avoiding the phenomenon that the valve cannot open or close properly because the force on the moving valve stem 4 in one direction is too large and the switching force applied by the electromagnetic coil / spring is insufficient to offset it.

[0026] As can also be seen from Figure 2, the axial cross-sections of the first balancing groove 4a and the second balancing groove 4b are both C-shaped, which makes it easier to form the force-bearing surface s by grooving and improves the processing convenience.

[0027] Preferably, the opening position of the fluid inlet 16 is adapted to the position of the sealing protrusion 4c, and the opening positions of the two fluid outlets 7 are adapted to the positions of the first balance groove 4a and the second balance groove 4b, respectively.

[0028] Referring to Figure 2, the inner support 9 has a groove inside that is adapted to the sealing protrusion 4c. The longitudinal section of the groove is C-shaped, thereby avoiding collision with the sealing protrusion 4c on the valve stem 4, which would affect the valve's opening and closing effect.

[0029] In this embodiment, the first sealing element 6 is an O-ring; the second sealing element 10 is a Glyd ring.

[0030] An organized gas spring region 12 is formed between the moving valve stem 4 and the bottom sealing seat 13. This arrangement reduces the negative impact of the gas spring effect.

[0031] Based on the above structure, the high-pressure straight-through valve described in this example can be used as both a normally closed valve and an open valve. The specific principle is as follows:

[0032] When used as a normally closed valve, the fluid outlet on the upper right side is blocked with a plug. If the solenoid coil 19 is not energized, the moving valve stem 4 relies on the downward preload from the spring 3. In this state, high-pressure fluid flows in from the fluid inlet 16 on the left side and accumulates in the area above the moving valve stem 4, and the valve is in the closed position. If the solenoid coil 19 is energized, the upward force provided by the solenoid coil 19 overcomes the preload of the upper spring 3, and the moving valve stem 4 is lifted, allowing high-pressure fluid to enter from the left side and flow out through the fluid outlet 7 on the lower right side. That is, in the energized state, the valve is in the open position.

[0033] When used as a normally open valve, the fluid outlet 7 on the lower right side is blocked with a plug. If the solenoid coil 19 is not energized, the moving valve stem 4 relies on the downward preload from the spring 3. In this state, high-pressure fluid flows in from the fluid inlet 16 on the left side and flows out through the fluid outlet 7 on the upper right side. That is, in the energized state, the valve is in the open position. If the solenoid coil 19 is energized, the upward force provided by the solenoid coil 19 overcomes the preload of the upper spring 3, and the moving valve stem 4 is lifted, allowing high-pressure fluid to enter from the left side and accumulate in the area above the moving valve stem 4, and the valve is in the closed position.

[0034] Furthermore, even without any plugs installed, the high-pressure straight-through valve described in this example can still operate normally due to its self-balancing structure. In this case, the valve will become a two-position three-way directional valve: when the solenoid coil 19 is not energized, the downward preload from the spring 3 causes the high-pressure fluid to flow in from the fluid inlet 16 on the left and out through the fluid outlet 7 on the upper right; when the solenoid coil 19 is energized, the downward preload from the spring 3 is overcome by the electromagnetic force, causing gas to enter from the fluid inlet 16 on the left and out through the fluid outlet 7 on the lower right.

[0035] Beneficial effects: The high-pressure straight-through valve described in this embodiment seals the upper and lower ends of the moving valve stem 4 with the first sealing element 6 and a sliding sleeve, so that the high-pressure fluid can only apply pressure to one end of the moving valve stem 4 in one direction. At the same time, through two force-bearing surfaces s with the same structure and axial projection area, the high-pressure fluid can only act on the moving valve stem 4 through the two force-bearing surfaces s after the moving valve stem is sealed, ensuring that the pressure on the moving valve stem 4 is the same in both directions, achieving a self-balancing effect. That is, no matter the position of the moving valve stem 4, the pressure at both ends is always balanced. The only external force affecting the moving valve stem 4 is the force applied to the moving valve stem 4 by the spring 3 or the electromagnetic coil 17. This ensures that the moving valve stem 4 itself is not affected by the pressure of the high-pressure fluid, thereby avoiding the phenomenon that the valve cannot open or close normally due to the excessive force on the moving valve stem 4 in one direction, which makes the switching force applied by the electromagnetic coil / spring insufficient to offset it. This makes it more adaptable to high-pressure fluids.

[0036] Finally, it should be noted that the above description is merely a preferred embodiment of this application. Those skilled in the art, under the guidance of this application, can make various similar representations without departing from the spirit and claims of this application, and all such modifications fall within the protection scope of this application.

Claims

1. A high-pressure straight-through valve, comprising a valve body (14) and a moving valve stem (4), wherein a mounting cavity penetrating both the upper and lower ends of the valve body (14) is provided at the center of the valve body (14), the moving valve stem (4) is inserted into the mounting cavity, and a fluid inlet (16) and two fluid outlets (7) communicating with the mounting cavity are provided on the valve body (14), characterized in that, A bushing (5), an upper support sleeve (18), an upper inner valve seat (8), an intermediate support sleeve (9), a lower inner valve seat (11), and a lower support sleeve (15) are sequentially fitted onto the moving valve stem (4) in the mounting cavity from top to bottom. First sealing elements (6) are provided between the upper part of the moving valve stem (4) and the bushing (5), and between the lower end of the moving valve stem (4) and the valve body (14). A first balancing groove (4a) and a second balancing groove (4b) are circumferentially formed on the moving valve stem (4) between the two first sealing elements (6). The upper inner valve seat (8) is formed on the moving valve stem (4) between the first balancing groove (4a) and the second balancing groove (4b). The sealing protrusion (4c) of the lower inner valve seat (11) is sealed and fitted. The inlet end of the fluid inlet (16) is connected to the mounting cavity at the sealing protrusion (4c) through the through hole opened by the intermediate support sleeve (9). Two opposing force-bearing surfaces (s) with the same axial projection area are formed on the upper surface of the first balance groove (4a) and the lower surface of the second balance groove (4b). The inlet end of one fluid outlet (7) is connected to the first balance groove (4a) through the through hole opened by the upper support sleeve (18). The inlet section of the other fluid outlet (7) is connected to the second balance groove (4b) through the through hole opened by the lower support sleeve (15).

2. The high-pressure straight-through valve according to claim 1, characterized in that, A bottom sealing seat (13) is installed at the bottom of the mounting cavity, and an electromagnetic coil (19) is fixed at the top of the valve body (14). The upper part of the moving valve stem (4) extends into the electromagnetic coil (19). A support step is formed on the upper part of the moving valve stem (4). A spring (3) is fitted on the moving valve stem (4) above the support step. A fixed valve stem (2) is provided in the electromagnetic coil (19) above the moving valve stem. The upper end of the fixed valve stem (2) is fixed by the valve cover (1). The two ends of the spring (3) abut between the support step and the lower end face of the fixed valve stem (2). A wire (20) is electrically connected to the top of the electromagnetic coil (19).

3. The high-pressure straight-through valve according to claim 1, characterized in that, The inner wall of the intermediate support sleeve (9) is formed with a groove that corresponds to the sealing protrusion (4c).

4. The high-pressure straight-through valve according to claim 3, characterized in that, The axial cross-section of the groove is C-shaped.

5. The high-pressure straight-through valve according to claim 1, characterized in that, The opening position of the fluid inlet (16) is adapted to the position of the sealing protrusion (4c), and the opening positions of the two fluid outlets (7) are adapted to the positions of the first balance groove (4a) and the second balance groove (4b), respectively.

6. The high-pressure straight-through valve according to claim 5, characterized in that, An anti-slip tube (17) is installed in both the fluid inlet (16) and the fluid outlet (7), and the inner end of the anti-slip tube (17) extends into the through hole opened in the upper support sleeve (18), the middle support sleeve (9) and the lower support sleeve (15).

7. The high-pressure straight-through valve according to claim 1, characterized in that, The axial cross-sections of the first balancing groove (4a) and the second balancing groove (4b) are both C-shaped.

8. The high-pressure straight-through valve according to claim 1, characterized in that, A second sealing element (10) is provided between the upper inner valve seat (8), the lower inner valve seat (11), and the valve body (14).

9. The high-pressure straight-through valve according to claim 8, characterized in that, The second seal (10) is a Glyd ring.

10. The high-pressure straight-through valve according to any one of claims 1-9, characterized in that, The first sealing element (6) adopts an O-ring seal.

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