An adjustable self-closing gate valve

Abstract

This utility model relates to the field of gate valve technology and discloses an adjustable self-closing gate valve, including a valve body. A first gate valve tube and a second gate valve tube are respectively installed on the left and right sides of the valve body. A movable port is provided on the outer side of the second gate valve tube. An adjusting component is provided inside the second gate valve tube and the movable port. A support frame is fixedly installed on the top of the valve body. A threaded rod is movably installed inside the support frame. A handwheel is threadedly connected to the outer side of the top of the threaded rod, and a gate plate is fixedly connected to the bottom of the threaded rod. This utility model, through the cooperation of the connecting plate, the limiting hole, and the fixing hole, allows adjustment of the relative position of the second gate valve tube and the movable port, achieving stepless adjustment (±50mm) of the distance between the inlet and outlet ends of the valve body. This design solves the problem of difficult pipe flange alignment caused by the fixed length of traditional gate valves, reduces the use of expansion joints or custom pipes, thereby reducing installation costs. Simultaneously, the stepless adjustment of the valve body distance significantly improves installation adaptability.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, specifically to an adjustable self-closing gate valve. Background Technology

[0002] A gate valve is an opening and closing element consisting of a gate. The direction of the gate's movement is perpendicular to the direction of fluid flow. Gate valves can only be fully open or fully closed; they cannot be used for regulation or throttling. Gates can be rigid or resilient, and based on the type of gate, gate valves are classified as rigid gate valves or resilient gate valves.

[0003] Existing self-closing gate valves typically employ a fixed-length valve body structure, meaning the distance between the inlet and outlet ends (valve body length) is determined during manufacturing and cannot be adjusted according to on-site pipeline installation requirements. This design presents the following problems in practical applications:

[0004] Poor installation compatibility

[0005] Since the valve body length is fixed, when the pipe flange spacing does not match the valve size, it is necessary to install additional expansion joints, compensators, or custom pipes, which increases the installation cost and complexity.

[0006] In space-constrained environments (such as densely populated equipment areas), valves may be unable to be installed due to being too long or too short.

[0007] Difficult to maintain and replace

[0008] If a valve is damaged and needs to be replaced, the length of the new valve must be exactly the same as the original valve; otherwise, the pipeline layout will need to be readjusted, affecting the system's operating efficiency. Utility Model Content

[0009] The purpose of this invention is to provide an adjustable self-closing gate valve to solve the problems mentioned in the background art.

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] An adjustable self-closing gate valve includes a valve body, characterized in that: a first gate valve tube and a second gate valve tube are respectively installed on the left and right sides of the valve body; a movable port is provided on the outer side of the second gate valve tube; an adjustment component is provided inside the second gate valve tube and the movable port; a support frame is fixedly installed on the top of the valve body; a threaded rod is movably installed inside the support frame; a handwheel is threadedly connected to the outer side of the top of the threaded rod; and a gate plate is fixedly connected to the bottom of the threaded rod.

[0012] Furthermore, the adjusting assembly includes a connecting plate, which is fixedly installed on the outside of the second gate valve pipe. The inner side of the movable port is provided with a connecting groove that matches the connecting plate. The inside of the connecting plate is provided with a plurality of limiting holes. The side of the movable port is provided with a fixing hole, and the limiting hole matches the fixing hole.

[0013] Furthermore, the valve body is an integral forged structure of A105 forged steel that has undergone normalizing and tempering treatment, the inner wall of the valve body is coated with epoxy resin, and the wall thickness of the valve body is ≥50mm.

[0014] Furthermore, the outer side of the second gate valve tube and the inner side of the active port are coated with sealant, which is made of silicone sealant.

[0015] Furthermore, both the first gate valve tube and the active port have placement grooves on their sides, and flexible graphite rings are embedded inside the placement grooves.

[0016] Furthermore, a sealing gasket is fixedly installed on the top of the valve body and the bottom of the support frame, and the sealing gasket is made of nitrile rubber material.

[0017] Furthermore, the flange neck of the first gate valve pipe and the active port is provided with annular reinforcing ribs. The height of the reinforcing ribs is 1.2 times the wall thickness of the valve body, and the width is 0.8 times the wall thickness. The reinforcing ribs and the valve body are formed by integral forging.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. This utility model, through the cooperation of the connecting plate, limiting hole, and fixing hole, allows for adjustment of the relative position of the second gate valve pipe and the movable port, achieving stepless adjustment (±50mm) of the distance between the valve body inlet and outlet ends. This design solves the problem of difficult pipe flange alignment caused by the fixed length of traditional gate valves, reducing the use of expansion joints or custom pipes, thereby lowering installation costs. Simultaneously, the stepless adjustment of the valve body distance significantly improves installation adaptability. Furthermore, the mating surface between the second gate valve pipe and the movable port is coated with high-temperature resistant (-60℃~250℃) silicone sealant to fill microscopic gaps and prevent media leakage. The movable port and adjustment components adopt a modular design, allowing for quick disassembly and facilitating the replacement of seals or cleaning of the valve cavity.

[0020] 2. The reinforcing ribs on the flange neck of this utility model (with a height 1.2 times the valve body wall thickness and a width 0.8 times the wall thickness) significantly improve the resistance to bending stress and extend the valve's lifespan. Simultaneously, the flexible graphite rings embedded in the groove maintain a seal even after the spacing is adjusted, effectively preventing leakage risks caused by pipeline misalignment. Attached Figure Description

[0021] Figure 1This is a schematic diagram of the overall structure of this utility model. Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the overall structure of this utility model. Figure 2 ;

[0023] Figure 3 This is a schematic diagram of the valve body and movable port of this utility model after disassembly;

[0024] Figure 4 This is a cross-sectional structural diagram of the overall structure of this utility model;

[0025] Figure 5 This is a utility model Figure 4 Enlarged view of point A in the middle.

[0026] Reference numerals: 1. Valve body; 2. First gate valve tube; 3. Second gate valve tube; 4. Movable port; 5. Adjustment assembly; 501. Connecting plate; 502. Connecting groove; 503. Limiting hole; 504. Fixing hole; 6. Placement groove; 7. Support frame; 8. Sealing gasket; 9. Threaded rod; 10. Handwheel; 11. Gate plate. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the above description of this utility model, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0032] Figures 1-5 This is the preferred embodiment of the present invention, which is described below in conjunction with... Figures 1-5 The present invention will be further described below.

[0033] An adjustable self-closing gate valve includes a valve body 1, with a first gate valve pipe 2 and a second gate valve pipe 3 installed on the left and right sides of the valve body 1, respectively. A movable port 4 is provided on the outer side of the second gate valve pipe 3. An adjusting component 5 is provided inside the second gate valve pipe 3 and the movable port 4. A support frame 7 is fixedly installed on the top of the valve body 1. A threaded rod 9 is movably installed inside the support frame 7. A handwheel 10 is threadedly connected to the outer side of the top of the threaded rod 9. A gate plate 11 is fixedly connected to the bottom of the threaded rod 9. Specifically, the relative position of the second gate valve pipe 3 and the movable port 4 can be adjusted by the adjusting component 5 to achieve stepless adjustment (±50mm) of the distance between the inlet end and the outlet end of the valve body.

[0034] The adjusting assembly 5 includes a connecting plate 501, which is fixedly installed on the outside of the second gate valve pipe 3. The inner side of the movable port 4 is provided with a connecting groove 502 that is adapted to the connecting plate 501. The inside of the connecting plate 501 is provided with several limiting holes 503. The side of the movable port 4 is provided with a fixing hole 504, which is adapted to the limiting hole 503. Specifically, by sliding the movable port 4 on the outside of the connecting plate 501, the movable port 4 is moved to a suitable position, and then the fixing bolt is fixed in the fixing hole 504 and the corresponding limiting hole 503 to fix the movable port 4.

[0035] The valve body 1 is an integral forged structure made of A105 forged steel after normalizing and tempering. The inner wall of the valve body 1 is coated with epoxy resin, and the wall thickness of the valve body 1 is ≥50mm. Specifically, the valve body 1, which is an integral forged structure made of A105 forged steel after normalizing and tempering, is suitable for high-pressure conditions (PN40 and above). The design of the valve body 1 wall thickness ≥50mm ensures that the valve will not deform under extreme pressure (such as 10MPa).

[0036] The outer side of the second gate valve pipe 3 and the inner side of the movable port 4 are coated with sealant, which is made of silicone sealant. Specifically, the mating surface between the second gate valve pipe 3 and the movable port 4 is coated with high-temperature resistant (-60℃~250℃) silicone sealant, which can fill micro gaps and prevent media leakage.

[0037] The first gate valve pipe 2 and the movable port 4 are both provided with placement grooves 6 on their sides, and flexible graphite rings are embedded inside the placement grooves 6. Specifically, the flexible graphite rings embedded in the placement grooves 6 can still maintain a seal after the spacing is adjusted, so as to avoid the risk of leakage caused by pipe misalignment.

[0038] A sealing gasket 8 is fixedly installed on the top of the valve body 1 and the bottom of the support frame 7. The sealing gasket 8 is made of nitrile rubber material. Specifically, the top of the valve body 1 and the bottom of the support frame 7 use oil-resistant nitrile rubber (NBR) sealing gaskets, which are suitable for various media such as water, oil, and gas.

[0039] The flange necks of the first gate valve pipe 2 and the movable port 4 are provided with annular reinforcing ribs. The height of the reinforcing ribs is 1.2 times the wall thickness of the valve body, and the width is 0.8 times the wall thickness. The reinforcing ribs and the valve body 1 are formed by integral forging. Specifically, the reinforcing ribs of the flange neck (height 1.2 times the wall thickness, width 0.8 times the wall thickness) significantly improve the resistance to bending stress and extend the valve life.

[0040] The working principle and usage process of this utility model are as follows: During installation, the first gate valve pipe 2 is first connected to the upstream pipeline flange, and the movable port 4 is temporarily fixed to the downstream pipeline flange. Before fixing, a flexible graphite ring needs to be embedded in the placement groove 6. Then, the fixing bolts of the movable port 4 are loosened, allowing it to slide axially along the second gate valve pipe 3 to the matching position with the downstream pipeline flange. The connection is then secured with bolts through the alignment of the limiting hole 503 and the fixing hole 504. This adjustment mechanism can achieve stepless adjustment of the distance between the inlet and outlet ends of the valve body 1 within a range of ±50mm. This design solves the problem of difficult pipeline flange alignment caused by the fixed length of traditional gate valves, reduces the use of expansion joints or customized pipelines, thereby reducing installation costs. At the same time, the stepless adjustment of the distance between the valve body 1 significantly improves installation adaptability. In addition, the mating surface of the second gate valve pipe 3 and the movable port 4 is sprayed with high-temperature resistant (-60℃~250℃) silicone sealant to fill microscopic gaps and prevent media leakage. The movable port 4 and the adjustment component 5 adopt a modular design, which can be quickly disassembled for easy replacement of seals or cleaning of the valve cavity.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An adjustable self-closing gate valve comprising a valve body (1), characterized in that: The valve body (1) is equipped with a first gate valve tube (2) and a second gate valve tube (3) on its left and right sides respectively. The second gate valve tube (3) has a movable port (4) on its outer side. An adjustment assembly (5) is provided inside the second gate valve tube (3) and the movable port (4). A support frame (7) is fixedly installed on the top of the valve body (1). A threaded rod (9) is movably installed inside the support frame (7). A handwheel (10) is threadedly connected to the outer side of the top of the threaded rod (9). A gate plate (11) is fixedly connected to the bottom of the threaded rod (9). The adjustment assembly (5) includes a connecting... The connecting plate (501) is fixedly installed on the outside of the second gate valve pipe (3). The inner side of the movable port (4) is provided with a connecting groove (502) that is compatible with the connecting plate (501). The connecting plate (501) is provided with a plurality of limiting holes (503) inside. The side of the movable port (4) is provided with a fixing hole (504). The limiting hole (503) is compatible with the fixing hole (504). The outer side of the second gate valve pipe (3) and the inner side of the movable port (4) are sprayed with sealant, which is made of silicone sealant.

2. An adjustable self-closing gate valve according to claim 1, characterized in that: The valve body (1) is an integral forged structure of A105 forged steel after normalizing and tempering treatment. The inner wall of the valve body (1) is coated with epoxy resin, and the wall thickness of the valve body (1) is ≥50mm.

3. An adjustable, self-closing gate valve according to claim 1, characterized in that: The first gate valve pipe (2) and the active port (4) are both provided with placement grooves (6), and flexible graphite rings are embedded inside the placement grooves (6).

4. An adjustable, self-closing gate valve according to claim 1, characterized in that: A sealing gasket (8) is fixedly installed on the top of the valve body (1) and the bottom of the support frame (7), and the sealing gasket (8) is made of nitrile rubber material.

5. An adjustable, self-closing gate valve according to claim 1, characterized in that: The flange necks of the first gate valve pipe (2) and the active port (4) are provided with annular reinforcing ribs. The height of the reinforcing ribs is 1.2 times the wall thickness of the valve body, and the width is 0.8 times the wall thickness. The reinforcing ribs and the valve body (1) are formed by integral forging.

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