Leakage-proof petroleum wellhead gate valve

Abstract

The utility model discloses an anti-leakage petroleum wellhead gate valve which comprises a gate valve body, an upper mounting seat and a lower mounting seat are mounted on the gate valve body, the upper mounting seat is located above the lower mounting seat, and a lower extension plate is fixedly connected to the bottom of the upper mounting seat. The lower extension plate is inserted into the lower mounting seat, limiting plates are symmetrically and fixedly connected to the bottom of the lower extension plate, a plurality of groups of sealing plates are arranged above the limiting plates, the sealing plates are slidably connected to the lower end part of the lower extension plate, and limiting rings are arranged in the sealing plates; and the limiting ring is in threaded connection with the inner side of the lower extension plate, so that the contact area of the joint of the upper mounting seat and the lower mounting seat can be increased, meanwhile, the path of internal oil liquid leaking to the outside can form a labyrinth path, the difficulty of the internal oil liquid leaking to the outside is increased, and therefore the sealing effect of the whole gate valve is improved.

Description

Technical Field

[0001] The utility model relates to an anti-leakage oil wellhead gate valve, belonging to the technical field of oil wellhead gate valves. Background Art

[0002] Wellhead gate valve is an important device for controlling the flow and pressure of oil wellhead. It is usually installed on the wellhead pipeline and is a tool to control the flow of oil by opening and closing the gate valve. At present, in order to improve the sealing performance of the gate valve during use, various sealing structures are set at the connection between the gate valve and the pipeline on the market. Although the sealing effect of the connection between the gate valve and the pipeline has been improved, the sealing reinforcement of the gate valve connection has been neglected, resulting in oil leakage due to aging of the gate valve connection during long-term use. Utility Model Content

[0003] The utility model aims to provide a leakage-proof petroleum wellhead gate valve to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-leakage oil wellhead gate valve, comprising a gate valve body, an upper mounting seat and a lower mounting seat are installed on the gate valve body, and the upper mounting seat is located above the lower mounting seat, the bottom of the upper mounting seat is fixedly connected with a lower extension plate, and the lower extension plate is inserted into the interior of the lower mounting seat, the bottom of the lower extension plate is symmetrically fixedly connected with a limit plate, a plurality of groups of sealing plates are arranged above the limit plate, and the sealing plate is slidably connected to the lower end of the lower extension plate, a limit ring is arranged inside the sealing plate, and the limit ring is threadedly connected to the inner side of the lower extension plate.

[0005] Furthermore, a return spring is fixedly connected to the outer end of the sealing plate, and a connecting and mounting groove is provided on one side of the lower extension plate.

[0006] Furthermore, a connecting seat is fixedly connected between the inner cavity of the connecting and mounting groove and the reset spring.

[0007] Furthermore, an upper extension plate is symmetrically fixedly connected to the top of the lower mounting seat, and the upper extension plate is inserted into the bottom of the upper mounting seat.

[0008] Furthermore, a limited mounting groove is provided at the bottom of the upper mounting seat, and the upper extension plate is located inside the limited mounting groove.

[0009] Furthermore, an edge sealing gasket is provided between the edges of the upper mounting seat and the lower mounting seat.

[0010] Furthermore, the upper mounting seat and the lower mounting seat are both provided with a communicating groove.

[0011] The beneficial effect of the utility model is that the utility model can increase the contact area at the connection between the upper mounting seat and the lower mounting seat through the mutual cooperation of the lower extension plate, the limit plate, the limit ring, the sealing plate, the upper extension plate and the connecting groove, and at the same time can form a labyrinthine path for the internal oil to leak to the outside, thereby increasing the difficulty of the internal oil to leak to the outside, thereby improving the sealing effect of the entire gate valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the specific embodiments of the present invention and do not constitute a limitation to the present invention.

[0013] Figure 1 It is a schematic diagram of the cross-sectional structure of the main view of the utility model;

[0014] Figure 2 This utility model Figure 1 A magnified schematic diagram of the details of the middle part A;

[0015] Figure 3 It is a schematic diagram of the main cross-sectional structure when the limit ring is not installed in the utility model;

[0016] Figure 4 This utility model Figure 3 A magnified diagram of the details of part B in the middle.

[0017] Numbers in the figure: 1, gate valve body; 2, upper mounting seat; 21, lower extension plate; 211, connecting mounting groove; 22, limit plate; 23, limit ring; 231, sealing plate; 232, connecting seat; 233, reset spring; 24, limit mounting groove; 3, lower mounting seat; 31, upper extension plate; 4, connecting groove; 5, edge sealing gasket. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the practical embodiment clearer, the technical solutions in the embodiment will be clearly and completely described below in conjunction with the drawings in the practical embodiment. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0020] In the description of this utility, 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 an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this utility can be understood according to specific circumstances.

[0021] Example

[0022] See also Figure 1-Figure 4 According to an embodiment of the utility model, a leak-proof petroleum wellhead gate valve includes a gate valve body 1, on which an upper mounting seat 2 and a lower mounting seat 3 are installed. The gate valve body 1 forms the main body of the entire gate valve under the mutual cooperation of the upper mounting seat 2 and the lower mounting seat 3, wherein the upper mounting seat 2 and the lower mounting seat 3 are respectively used to connect the upper pipeline and the lower pipeline, and the upper mounting seat 2 is located above the lower mounting seat 3, and the bottom of the upper mounting seat 2 is fixedly connected with a lower extension plate 21, and the lower extension plate 21 is used to connect the upper mounting seat 2 and the lower mounting seat 3. At this time, the lower end of the upper mounting seat 2 passes through the lower extension plate 21 and is embedded with the lower mounting seat 3, which can increase the contact area at the connection between the upper mounting seat 2 and the lower mounting seat 3, and at the same time, it can make the internal oil and the outer edge between A labyrinthine outlet is formed to increase the difficulty of internal oil leakage to the outside, thereby improving the sealing effect of the entire gate valve. The lower extension plate 21 is inserted into the interior of the lower mounting seat 3, and the bottom of the lower extension plate 21 is symmetrically fixedly connected to the limiting plate 22, wherein the limiting plate 22 is used to further enhance the labyrinthine sealing effect formed by the lower extension plate 21 inside the lower mounting seat 3. A plurality of groups of sealing plates 231 are provided above the limiting plate 22, and the sealing plate 231 is slidably connected to the lower end of the lower extension plate 21. A limiting ring 23 is provided inside the sealing plate 231, and the limiting ring 23 is threadedly connected to the inner side of the lower extension plate 21. The limiting ring 23, in cooperation with the sealing plate 231, forms a connector for reinforcing the connection between the top of the lower extension plate 21 and the top of the inner cavity of the lower mounting seat 3.

[0023] A return spring 233 is fixedly connected to the outer end of the sealing plate 231 , and a connecting installation groove 211 is opened on one side of the lower extension plate 21 ; wherein the return spring 233 and the connecting installation groove 211 both play a connecting role.

[0024] A connecting seat 232 is fixedly connected between the inner cavity of the connecting mounting groove 211 and the reset spring 233; the connecting seat 232 is used to assist in resetting the sealing plate 231, and at the same time can provide an inward squeezing force on the inner limiting ring 23, which helps to improve the stability of the limiting ring 23.

[0025] The top of the lower mounting seat 3 is symmetrically fixedly connected with an upper extension plate 31, and the upper extension plate 31 is inserted into the bottom of the upper mounting seat 2; wherein the upper extension plate 31 is used to provide a mounting member connecting the top of the lower mounting seat 3 and the bottom of the upper mounting seat 2.

[0026] A limiting installation groove 24 is provided at the bottom of the upper installation seat 2 , and the upper extension plate 31 is located inside the limiting installation groove 24 ; wherein the limiting installation groove 24 is used to provide installation space for the upper extension plate 31 .

[0027] An edge sealing gasket 5 is provided between the edges of the upper mounting seat 2 and the lower mounting seat 3 ; wherein the edge sealing gasket 5 is used to increase the sealing effect between the upper mounting seat 2 and the lower mounting seat 3 .

[0028] The upper mounting seat 2 and the lower mounting seat 3 are both provided with a communication groove 4, wherein the communication groove 4 is used to provide a communication channel for the rotation of the rotating rod in the gate valve.

[0029] Working principle of the utility model: when installing the entire gate valve, first connect the lower mounting seat 3 with the end of the pipeline, and then connect the upper mounting seat 2 with the lower mounting seat 3. During the use of the entire gate valve, the upper mounting seat 2 and the lower mounting seat 3 cooperate with each other through the lower extension plate 21, the limit plate 22, the limit ring 23, the sealing plate 231 and the upper extension plate 31, and the connecting groove 4, so that the connection between the upper mounting seat 2 and the lower mounting seat 3 forms a winding connection surface. When the internal oil wants to leak to the outside through the connection between the upper mounting seat 2 and the lower mounting seat 3, it is necessary to pass through the connection between the sealing plate 231 and the inner cavity of the lower mounting seat 3, the connection between the lower extension plate 21 and the upper extension plate 31, the connection between the upper extension plate 31 and the limit mounting groove 24, and the connection between the edge sealing gasket 5 and the upper mounting seat 2 and the lower mounting seat 3, so that the path when the internal oil leaks to the outside forms a labyrinthine path, thereby achieving the purpose of improving the sealing effect of the entire gate valve.

[0030] The above are preferred implementation modes of the present invention. Technicians in the field to which the present invention belongs can also change and modify the above implementation modes. Therefore, the present invention is not limited to the above specific implementation modes. Any obvious improvements, substitutions or modifications made by technicians in this field on the basis of the present invention belong to the protection scope of the present invention.

Claims

1. A leak-proof petroleum wellhead gate valve, characterized in that: The invention comprises a gate valve body (1), an upper mounting seat (2) and a lower mounting seat (3) being mounted on the gate valve body (1), and the upper mounting seat (2) being located above the lower mounting seat (3), a lower extension plate (21) being fixedly connected to the bottom of the upper mounting seat (2), and the lower extension plate (21) being inserted into the interior of the lower mounting seat (3), a limit plate (22) being symmetrically fixedly connected to the bottom of the lower extension plate (21), a plurality of groups of sealing plates (231) being arranged above the limit plate (22), and the sealing plate (231) being slidably connected to the lower end of the lower extension plate (21), a limit ring (23) being arranged inside the sealing plate (231), and the limit ring (23) being threadedly connected to the inner side of the lower extension plate (21).

2. The anti-leakage petroleum wellhead gate valve according to claim 1, characterized in that: A return spring (233) is fixedly connected to the outer end of the sealing plate (231), and a connection installation groove (211) is provided on one side of the lower extension plate (21).

3. The anti-leakage petroleum wellhead gate valve according to claim 2, characterized in that: A connecting seat (232) is fixedly connected between the inner cavity of the connecting and mounting groove (211) and the return spring (233).

4. The anti-leakage petroleum wellhead gate valve according to claim 1, characterized in that: An upper extension plate (31) is symmetrically fixedly connected to the top of the lower mounting seat (3), and the upper extension plate (31) is inserted into the bottom of the upper mounting seat (2).

5. The anti-leakage petroleum wellhead gate valve according to claim 4, characterized in that: A limit installation groove (24) is provided at the bottom of the upper installation seat (2), and the upper extension plate (31) is located inside the limit installation groove (24).

6. The anti-leakage petroleum wellhead gate valve according to claim 1, characterized in that: An edge sealing gasket (5) is provided between the edges of the upper mounting seat (2) and the lower mounting seat (3).

7. The anti-leakage petroleum wellhead gate valve according to claim 1, characterized in that: The upper mounting seat (2) and the lower mounting seat (3) are both provided with a communicating groove (4).

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