Flat gate valve of fixed gate plate

Abstract

Guide rail ribs are arranged on the inner side wall of a valve body, guide rail grooves are formed in the side wall of the gate plate, the guide rail ribs are correspondingly located in the guide rail grooves, gaps X exist between the guide rail ribs and the guide rail grooves, and movement of the gate plate can be limited through the guide rail ribs and the guide rail grooves. Meanwhile, the flashboard can be prevented from being excessively limited to influence normal movement through the gap X; the fixing assembly is arranged between the flashboard space and the flashboard sealing face to enhance the sealing effect of the flashboard, the gap Y exists between the fixing assembly and the valve body, and when the fixing assembly is extruded by the flashboard, the pressure borne by the fixing assembly can be reduced through the gap Y; the flashboard is relatively fixed in the valve body, and the size of the gap X is smaller than that of the gap Y, so that the force of a medium acting on the flashboard is not transmitted to the sealing surface of the fixing assembly and can only be transmitted to the guide rail rib of the valve body through the guide rail groove of the flashboard, the specific pressure of the sealing surface of the fixing assembly is reduced, and the service life of the fixing assembly is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to a flat gate valve with a fixed gate plate. Background Art

[0002] The flat gate valve is a sliding valve with a parallel gate as the closing part. Its closing part can be a single gate or a double gate with a propping mechanism in between. The pressing force of the gate to the valve seat is controlled by the medium pressure acting on the floating gate or floating valve seat.

[0003] When the flat gate valve is opened and closed, the force generated by the upstream medium will be directly transmitted to the sealing surface of the downstream gate. Generally, in order to enhance the sealing performance of the gate, a sealing structure will be set between the gate sealing surface and the valve. Since the gate sealing surface is in direct contact with the sealing structure on the valve, the force generated by the upstream medium will be transmitted to the sealing structure through the gate sealing surface and squeeze the sealing structure. Since the gate will also generate friction with the sealing structure when the valve is opened and closed, the sealing structure will accelerate wear when subjected to friction and excessive squeezing force at the same time, and its service life will be greatly shortened. The sealing performance between the gate and the valve will also be affected. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is that the sealing structure of the flat gate valve in the prior art will accelerate wear and shorten the service life when subjected to friction and excessive extrusion force at the same time, so as to provide a flat gate valve with a fixed gate.

[0005] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0006] A flat gate valve with a fixed gate plate, comprising:

[0007] A valve body, wherein a gate space is provided inside, and a protruding guide rib is provided at a position of an inner side wall of the valve body corresponding to the gate space;

[0008] The gate is arranged inside the valve body through the valve stem and is located inside the gate space. A guide rail groove corresponding to the guide rail rib is opened on the side wall of the gate. The guide rail rib is correspondingly located in the guide rail groove, and there is a gap X between the guide rail rib and the guide rail groove.

[0009] A fixing component is arranged between the gate plate space and the sealing surface of the gate plate. The sealing surface of the fixing component close to the gate plate is tightly fitted with the sealing surface of the gate plate. There is a gap Y between the fixing component and the inner wall at the gate plate space position, and the size of the gap X is smaller than the gap Y.

[0010] Furthermore, the guide rail ribs are arranged on the two opposite side walls of the valve body, the guide rail grooves are opened on the two opposite side walls of the gate plate, and the two guide rail ribs and the two guide rail grooves are arranged in one-to-one correspondence.

[0011] Furthermore, the fixing assembly includes a fixer, a side of the fixer away from the gate is connected to the inner wall of the gate space through a spring, and there is a gap Y between the side of the fixer provided with the spring and the inner wall of the gate space.

[0012] Furthermore, the fixing assembly also includes a sealing ring located between the fixer and the gate plate, one end of the sealing ring away from the gate plate is embedded in a side of the fixer away from the spring, and the other end of the sealing ring abuts against the sealing surface of the gate plate.

[0013] Furthermore, the fixing assembly also includes an O-ring located between the fixer and the gate space, one end of the O-ring is embedded in a side of the fixer away from the gate space, and the other end of the O-ring abuts against the inner wall of the valve body.

[0014] Furthermore, a bracket is arranged on the top of the valve body, and a transparent dust cover is arranged on the top of the bracket.

[0015] Furthermore, the gate plate is connected to the valve stem via a T-shaped head, a hand wheel is provided on the outer side wall of the bracket, and one end of the valve stem away from the gate plate is connected to the hand wheel via a gear part.

[0016] Furthermore, a nut is fixedly provided on one end of the valve stem away from the gate plate, and the nut is meshed with the gear member.

[0017] Furthermore, a valve cover is provided on the top of the valve body, and the bracket is connected to the top of the valve cover by bolts.

[0018] The technical solution of the present invention has the following advantages:

[0019] 1. The flat gate valve with a fixed gate provided by the present invention is provided with a guide rib on the inner side wall of the valve body corresponding to the spatial position of the gate, and a guide groove is provided on the side wall of the gate, the guide rib is correspondingly located in the guide groove, and there is a gap X between the guide rib and the guide groove. With such a configuration, the movement of the gate can be limited by the guide rib and the guide groove, and at the same time, the gap X can avoid excessive limitation of the gate to affect its normal movement and use; a fixed component is provided between the valve body and the gate sealing surface, which can enhance the sealing effect of the gate, and there is a gap Y between the fixed component and the valve body, and the pressure on the fixed component can be reduced by the gap Y when the fixed component is squeezed by the gate; the gate is relatively fixed in the valve body, and because the size of the gap X is smaller than the size of the gap Y, the force of the medium acting on the gate will not be transmitted to the sealing surface of the downstream fixed component, but can only be transmitted to the guide rib of the valve body through the guide groove of the gate, and when the gate sealing surface moves in contact with the sealing surface of the fixed component, the specific pressure of the sealing surface of the fixed component is reduced, thereby increasing the service life of the fixed component.

[0020] 2. The flat gate valve with a fixed gate provided by the present invention has guide rails on both sides of the valve body, and guide rail grooves on both sides of the gate. The two guide rails are arranged in a one-to-one correspondence with the two guide rail grooves. This arrangement can improve the stability of the gate when it moves.

[0021] 3. The flat gate valve with a fixed gate provided by the present invention has a fixing assembly including a fixing device, the side of the fixing device away from the gate is connected to the inner wall of the gate space through a spring, and there is a gap Y between the side of the fixing device provided with the spring and the inner wall of the gate space. In this arrangement, by making the spring located in the gap Y, the fixing assembly can be buffered by the spring stress when the fixing assembly is squeezed by the gate, reducing the pressure on the fixing assembly, and at the same time reducing the resistance on the gate, thereby extending the service life of the fixing assembly and the gate.

[0022] 4. The fixed gate plate gate valve provided by the present invention has a fixing assembly further including a sealing ring located between the fixing device and the gate plate, wherein one end of the sealing ring away from the gate plate is embedded in the side of the fixing device away from the spring, and the other end of the sealing ring abuts against the sealing surface of the gate plate. With such an arrangement, the sealing ring can strengthen the sealing performance of the connection between the gate plate and the fixing device, thereby ensuring the sealing performance of the valve body in a sealed state.

[0023] 5. The fixed gate plate gate valve provided by the present invention, the fixing assembly also includes an O-ring located between the holder and the gate plate space, one end of the O-ring is embedded in the side away from the gate plate space, and the other end of the O-ring abuts against the inner wall of the gate plate space. In this way, the O-ring can strengthen the tightness of the connection between the gate plate and the holder, thereby ensuring the sealing of the valve body in a sealed state.

[0024] 6. The flat gate valve with a fixed gate provided by the present invention has a transparent dust cover on the top of the bracket. With this arrangement, the position state of the gate plate when the valve stem drives the gate plate to move can be easily observed through the transparent dust cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic structural diagram of a flat gate valve with a fixed gate provided by an embodiment of the present invention;

[0027] Figure 2 for Figure 1 An enlarged schematic diagram of point B shown in FIG.

[0028] Figure 3 Schematic diagram of the positional relationship between the guide rail ribs and the guide rail grooves in the present invention;

[0029] Figure 4 is a cross-sectional view of the gate plate in the present invention;

[0030] Figure 5 for Figure 4 An enlarged schematic diagram of C shown in FIG.

[0031] Figure 6 A schematic diagram of force transmission inside the valve body provided by the present invention;

[0032] Figure 7 It is a schematic diagram of force transmission inside a valve body provided in the prior art.

[0033] Explanation of the accompanying reference numerals: 1. valve body; 2. guide rib; 3. gate; 4. valve stem; 5. guide groove; 6. gap X; 7. gap Y; 8. retainer; 9. spring; 10. sealing ring; 11. O-ring; 12. bracket; 13. transparent dust cover; 14. T-head; 15. hand wheel; 16. gear part; 17. valve cover. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] like Figure 1-6 A flat gate valve with a fixed gate shown in the figure comprises a valve body 1, a gate plate 3 and a fixed component. Specifically, a gate plate space is provided inside the valve body 1, and a protruding guide rail rib 2 is provided at a position on the inner wall of the valve body 1 corresponding to the gate plate space; the gate plate 3 is arranged inside the valve body 1 through a valve stem 4 and is located on the gate plate space, and a guide rail groove 5 corresponding to the guide rail rib 2 is opened on the side wall of the gate plate 3; the guide rail rib 2 is correspondingly located in the guide rail groove 5, and a gap X6 is provided between the guide rail rib 2 and the guide rail groove 5; the fixed component is provided between the gate plate space and the sealing surface of the gate plate 3, and the sealing surface of the fixed component close to the gate plate 3 is tightly fitted with the sealing surface of the gate plate 3, and a gap Y7 is provided between the other side of the fixed component and the inner wall of the valve body 1 where the gate plate space is provided, and the size of the gap X6 is smaller than the gap Y7.

[0039] This flat gate valve with a fixed gate is provided with a guide rib 2 on the inner wall of the valve body 1 on the side corresponding to the gate space position, and a guide groove 5 is provided on the side wall of the gate 3. The guide rib 2 is correspondingly located in the guide groove 5, and there is a gap X6 between the guide rib 2 and the guide groove 5. In this way, the movement of the gate 3 can be limited by the guide rib 2 and the guide groove 5, and at the same time, the gap X6 can avoid excessive limitation of the gate 3 to affect its normal movement and use; a fixed component is provided between the gate space and the sealing surface of the gate 3, which can enhance the sealing effect of the gate 3. As a result, there is a gap Y7 between the fixed component and the valve body 1, and the gap Y7 can be used to reduce the pressure on the fixed component when the fixed component is squeezed by the gate plate 3; the gate plate 3 is relatively fixed in the valve body 1, and because the size of the gap X6 is smaller than the size of the gap Y7, the force of the medium acting on the gate plate 3 will not be transmitted to the sealing surface of the fixed component, but can only be transmitted to the guide rail rib 2 of the valve body 1 through the guide rail groove 5 of the gate plate 3. When the sealing surface of the gate plate 3 moves in contact with the sealing surface of the fixed component, the specific pressure of the sealing surface of the fixed component is reduced, thereby increasing the service life of the fixed component.

[0040] In this embodiment, guide rail ribs 2 extending along the height direction of the gate plate 3 are provided on the opposite side walls of the valve body 1, and guide rail grooves 5 are provided on the opposite side walls of the gate plate 3. The two guide rail ribs 2 are respectively provided in a one-to-one correspondence with the two guide rail grooves 5. Such a configuration can improve the stability of the gate plate 3 when it moves up and down in the valve body 1.

[0041] In this embodiment, the fixing assembly includes a fixing device 8, and the side of the fixing device 8 away from the gate plate 3 is connected to the inner wall of the gate plate space through a spring 9, and there is a gap Y7 between the side of the fixing device 8 on which the spring 9 is provided and the inner wall of the gate plate space. In this arrangement, by making the spring 9 located in the gap Y7, the fixing assembly can be buffered by the stress of the spring 9 when the fixing assembly is squeezed by the gate plate 3, thereby reducing the pressure on the fixing assembly, and at the same time, reducing the resistance on the gate plate 3, thereby extending the service life of the fixing assembly and the gate plate 3.

[0042] In this embodiment, the fixing assembly further includes a sealing ring 10 located between the holder 8 and the gate 3, one end of the sealing ring 10 away from the gate 3 is embedded in the side of the holder 8 away from the spring 9, and the other end of the sealing ring 10 abuts against the sealing surface of the gate 3. In this arrangement, the sealing ring 10 can strengthen the connection sealing between the gate 3 and the holder 8, thereby ensuring the sealing of the valve body 1 in a sealed state. In this embodiment, the fixing assembly further includes an O-ring 11 located between the holder 8 and the gate space, one end of the O-ring 11 is embedded in the side of the holder 8 away from the gate space, and the other end of the O-ring 11 abuts against the inner wall of the gate space. In this arrangement, the O-ring 11 can strengthen the connection tightness between the gate 3 and the holder 8, thereby ensuring the sealing of the valve body 1 in a sealed state.

[0043] Specifically, during the opening and closing process of the gate plate 3, the left and right sealing surfaces of the gate plate 3 are always in contact with the sealing ring 10. When fully opened and fully closed, the sealing surface of the gate plate 3 and the sealing ring 10 are always in a sealed state. The O-ring 11 on the retainer 8 is always in contact with the gate plate space, and the O-ring 11 is always in a sealed state at the connection with the gate plate space.

[0044] In this embodiment, a bracket 12 is provided on the top of the valve body 1, and a transparent dust cover 13 is provided on the top of the bracket 12. In this way, the position state of the valve stem 4 driving the gate plate 3 to move can be observed through the transparent dust cover 13.

[0045] Specifically, a T-slot is provided on the top of the gate plate 3, a T-head 14 matching the T-slot is provided on the bottom of the valve stem 4, the gate plate 3 is connected to the valve stem 4 through the T-slot and the T-head 14, a nut is fixedly provided on the end of the valve stem 4 away from the gate plate 3, a gear 16 is meshed on the nut, and a handwheel 15 meshed with the gear 16 is provided on the outer wall of the bracket 12. Specifically, a valve cover 17 is connected to the top of the valve body 1, the bracket 12 is connected to the top of the valve cover 17 through bolts, and the end of the valve stem 4 away from the gate plate 3 passes through the valve cover 17 and extends into the bracket 12, and is connected to the gear 16 through the nut. In this way, by rotating the handwheel 15 clockwise to drive the gear 16 to rotate, and then drive the valve stem 4 to descend, the valve stem 4 drives the gate plate 3 to move downward, close the gate plate space, and cut off the medium; by rotating the handwheel 15 counterclockwise, the valve stem 4 rises to drive the gate plate 3 to move upward, open the gate plate space, and allow the medium to flow downstream.

[0046] Specifically, the sealing surface of the gate plate 3 can be made of a soft sealing surface material, or a sealing surface suitable for a hard alloy material. Specifically, the present application is applicable to a flat gate valve structure in which the flow guide hole can be located at the lower part of the gate plate 3, or to a flat gate valve structure in which the flow guide hole is located at the upper part of the gate plate 3 (the flow guide hole is inverted).

[0047] In summary, in this flat gate valve with a fixed gate, a guide rib 2 is provided on the inner wall of the valve body 1 on the side corresponding to the spatial position of the gate, and a guide groove 5 is provided on the side wall of the gate 3. The guide rib 2 is correspondingly located in the guide groove 5, and there is a gap X6 between the guide rib 2 and the guide groove 5. In this way, the movement of the gate 3 can be limited by the guide rib 2 and the guide groove 5, and at the same time, the gap X6 can avoid excessive limitation of the gate 3 to affect its normal movement and use; a fixed component is provided between the gate space and the sealing surface of the gate 3, which can enhance the sealing effect of the gate 3, and there is a gap Y7 between the fixed component and the valve body 1, and the pressure on the fixed component can be reduced through the gap Y7 when the fixed component is squeezed by the gate 3; compared Figure 7The valve body 1 and valve plate structure in the prior art shown in the figure, the gate plate 3 in the present application is relatively fixed in the valve body 1, and because the size of the gap X6 is smaller than the size of the gap Y7, the force of the medium acting on the gate plate 3 will not be transmitted to the sealing surface of the fixed component, but can only be transmitted to the guide rail rib 2 of the valve body 1 through the guide rail groove 5 of the gate plate 3. When the sealing surface of the gate plate 3 moves in contact with the sealing surface of the fixed component, the specific pressure of the sealing surface of the fixed component is reduced, thereby increasing the service life of the fixed component.

[0048] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A flat gate valve with a fixed gate, characterized in that: include: A valve body (1) is provided with a gate plate space inside, and a protruding guide rib (2) is provided at a position of the inner wall of the valve body (1) corresponding to the gate plate space; A gate plate (3) is arranged inside the valve body (1) through a valve stem (4) and is located inside the gate plate space; a guide rail groove (5) corresponding to the guide rail rib (2) is opened on the side wall of the gate plate (3); the guide rail rib (2) is correspondingly located in the guide rail groove (5), and a gap X (6) exists between the guide rail rib (2) and the guide rail groove (5); A fixing component is arranged between the gate plate space and the sealing surface of the gate plate (3); the sealing surface of the fixing component close to the gate plate (3) is tightly fitted with the sealing surface of the gate plate (3); a gap Y (7) exists between the other side of the fixing component and the inner wall of the valve body (1) where the gate plate space is located; the size of the gap X (6) is smaller than the gap Y (7).

2. According to the flat gate valve with a fixed gate plate as described in claim 1, the guide ribs (2) are arranged on the opposite side walls of the valve body (1), and the guide grooves (5) are opened on the opposite side walls of the gate plate (3), and the two guide ribs (2) and the two guide grooves (5) are arranged in a one-to-one correspondence.

3. The flat gate valve with a fixed gate according to claim 1, characterized in that: The fixing assembly comprises a fixing device (8), wherein a side of the fixing device (8) away from the gate plate (3) is connected to the inner wall of the gate plate space via a spring (9), and a gap Y (7) exists between a side of the fixing device (8) on which the spring (9) is provided and the inner wall of the gate plate space.

4. The flat gate valve with a fixed gate according to claim 3, characterized in that: The fixing assembly also includes a sealing ring (10) located between the fixing device (8) and the gate plate (3), wherein one end of the sealing ring (10) away from the gate plate (3) is embedded in a side of the fixing device (8) away from the spring (9), and the other end of the sealing ring (10) abuts against a sealing surface of the gate plate (3).

5. The flat gate valve with a fixed gate according to claim 3, characterized in that: The fixing assembly further comprises an O-ring (11) located between the fixing device (8) and the gate plate space, one end of the O-ring (11) being embedded in a side of the fixing device (8) away from the gate plate space, and the other end of the O-ring (11) being in contact with the inner wall of the valve body.

6. The flat gate valve with a fixed gate according to claim 1, characterized in that: A bracket (12) is arranged on the top of the valve body (1), and a transparent dust cover (13) is arranged on the top of the bracket (12).

7. The flat gate valve with a fixed gate according to claim 6, characterized in that: The gate plate (3) is connected to the valve stem (4) via a T-shaped head (14); a hand wheel (15) is provided on the outer side wall of the bracket (12); and one end of the valve stem (4) away from the gate plate (3) is connected to the hand wheel (15) via a gear part (16).

8. The flat gate valve with a fixed gate according to claim 7, characterized in that: A nut is fixedly provided at one end of the valve stem (4) away from the gate plate (3), and the nut is meshed with the gear member (16).

9. The flat gate valve with a fixed gate according to claim 6, characterized in that: A valve cover (17) is arranged on the top of the valve body (1), and the bracket (12) is connected to the top of the valve cover (17) by means of bolts.

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