A leak-proof oil production valve

Abstract

The utility model discloses a kind of anti-leakage oil exploitation valves, relating to oil exploitation field, including valve body, the valve body top is equipped with connecting flange, and connecting flange outer wall is equipped with valve cover, and valve cover outer wall is equipped with valve rod, the valve rod end portion is fixedly installed with hand wheel, the valve body outer wall is equipped with anti-leakage structure, the anti-leakage structure includes the sealing flange being arranged in the inner wall of connecting flange and valve cover, the inner wall of valve cover is equipped with sealing lug, and the inner wall of valve cover is equipped with sealing pad, the valve cover top is equipped with the limiting structure for preventing valve rod accidental rotation. The anti-leakage oil exploitation valve, further improve sealing effect by anti-leakage structure, effectively solve the problem that single sealing pad is easily leaked in prior art, limiting structure can effectively prevent leakage caused by valve rod accidental rotation leading to valve piece slightly opening, improve the security of valve use, further prevent leakage from occurring.

Description

Technical Field

[0001] This utility model relates to the field of oil extraction technology, specifically to a leak-proof oil extraction valve. Background Technology

[0002] In the oil extraction process, oil extraction valves are key equipment for controlling the flow of oil, and their sealing performance directly affects the safety and economy of oil extraction.

[0003] In the prior art, Chinese Patent No. CN216407742U discloses an oil extraction regulating valve, including a valve seat and a valve body. A valve stem is installed inside the valve body, and a valve plug is installed at the bottom of the valve stem. A pair of baffles are installed inside the valve body, with the top of the valve plug abutting against the bottom of the baffles. An upper abutment block, a lower abutment block, a diaphragm, and a collar are sequentially fitted onto the outer side of the valve stem from top to bottom. A first spring connects the upper and lower abutment blocks and is fitted onto the outer side of the valve stem. The collar has a through hole inside. The outer sides of the lower abutment block, diaphragm, and collar are fitted against the inner wall of the valve body. One end of the valve stem passes through the valve body, and a handwheel, a protective sleeve, and a pair of first flanges are sequentially fitted onto the outer side of the valve stem from top to bottom. The bottom of the first flanges is connected to the top of the valve body. This oil extraction regulating valve can quickly regulate the pressure inside the valve body, has high stability, a simple and reasonable structure, high practicality, and is easy to widely promote and use.

[0004] Based on the above information, existing oil extraction valves typically use a single sealing gasket at the connection between the valve cover and the valve body, which is prone to leakage. Furthermore, the valve stem handwheel lacks corresponding limit switches, making it easy for it to rotate accidentally, causing the valve plate to open slightly, affecting fluid control and leading to leakage. Therefore, we propose a leak-proof oil extraction valve. Utility Model Content

[0005] The purpose of this utility model is to provide a leak-proof oil extraction valve to solve the problems mentioned in the background art. In the prior art, oil extraction valves usually use a single sealing gasket at the connection between the valve cover and the valve body, which is prone to leakage. Furthermore, the valve stem handwheel lacks corresponding limit, which can easily cause accidental rotation, resulting in slight opening of the valve plate, affecting the control of the fluid and easily leading to leakage.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a leak-proof oil extraction valve, comprising a valve body, a connecting flange at the top of the valve body, a valve cover on the outer wall of the connecting flange, a valve stem on the outer wall of the valve cover, a handwheel fixedly installed at the end of the valve stem, a leak-proof structure on the outer wall of the valve body, the leak-proof structure including a sealing flange provided on the inner wall of the connecting flange and the valve cover, a sealing protrusion on the inner wall of the valve cover, a sealing gasket on the inner wall of the valve cover, and a limiting structure at the top of the valve cover to prevent accidental rotation of the valve stem.

[0007] Furthermore, the valve cover has a U-shaped cross-section and wraps around the connecting flange. The valve cover is fixed to the connecting flange by bolts. The sealing protrusion has an overall frustum-shaped design and abuts against the inner wall of the connecting flange.

[0008] Furthermore, the sealing gasket is located between the connecting flange and the valve cover, and the sealing gasket covers the inner wall of the valve cover and the outer wall of the sealing protrusion. The sealing gasket is made of rubber. The sealing flange is designed in a circular shape, and the sealing flanges are distributed at equal intervals. The diameter of the sealing flange gradually increases radially along the connecting flange and the valve cover.

[0009] Furthermore, the limiting structure includes a limiting spline fixedly installed on the top of the valve cover, and a guide block is provided at the end of the limiting spline. An unlocking turntable is slidably installed on the outer wall of the valve stem, and a limiting sleeve is provided at the center of the unlocking turntable. A limiting groove is opened on the outer wall of the limiting sleeve. A limiting slide rod is fixedly installed on the outer wall of the unlocking turntable, and a compression spring is sleeved on the outer wall of the limiting slide rod.

[0010] Furthermore, the guide block is cylindrical in shape, and the corner of the guide block away from the limiting spline is angled. A through hole for the valve stem to pass through is provided at the center of the limiting spline and the center of the guide block.

[0011] Furthermore, the unlocking turntable is located between the handwheel and the limit spline, the limit sleeve is slidably connected to the valve stem, and the outer diameter of the limit sleeve is larger than the diameter of the limit spline, and the limit groove is adapted to the limit spline.

[0012] Furthermore, the limiting slide bar has a T-shaped cross-section and is slidably connected to the handwheel. The limiting slide bar is set at an equal angle at the top of the unlocking turntable. The top end of the compression spring abuts against the bottom outer wall of the handwheel, and the bottom end of the compression spring abuts against the top outer wall of the unlocking turntable.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This leak-proof oil extraction valve features a leak-proof structure consisting of a sealing flange, a sealing bump, and a sealing gasket. The multi-seal design enhances the sealing performance between the connecting flange and the valve cover. The frustoconical sealing bump abuts against the inner wall of the connecting flange to form a preliminary seal, while the rubber sealing gasket covers the contact surface to form a secondary seal. The annular sealing flange with a gradually changing diameter further improves the sealing effect, effectively solving the problem of easy leakage with a single sealing gasket in existing technologies.

[0014] 2. By setting a limit structure, the valve stem can be effectively prevented from rotating accidentally. Under the action of the compression spring, the limit groove on the limit sleeve and the limit spline are tightly matched to lock the handwheel. When operation is required, simply pull the unlocking turntable upward to release the lock. The operation is convenient and can avoid leakage caused by the valve plate being slightly opened due to accidental contact, thus improving the safety of valve use.

[0015] 3. The valve cover adopts a U-shaped design to wrap around the connecting flange, and the connection stability is enhanced by bolt fixing. The cooperation of various sealing components and limit structure not only improves the sealing performance and the ability to prevent misoperation, but also facilitates installation and maintenance. It is suitable for scenarios with high sealing requirements, such as oil extraction, and has strong practicality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the cross-sectional structure of the valve cover of this utility model; Figure 3 This is a schematic diagram of the valve cover structure of this utility model; Figure 4 This is a schematic diagram of the cross-sectional structure of the unlocking turntable of this utility model; Figure 5 This is a schematic diagram of the internal structure of the limiting sleeve of this utility model; Figure 6 This is a schematic diagram of the unlocking turntable, limiting sleeve, and limiting slide bar of this utility model.

[0017] In the diagram: 1. Valve body; 101. Connecting flange; 2. Valve cover; 201. Sealing protrusion; 3. Valve stem; 301. Handwheel; 4. Sealing gasket; 5. Sealing flange; 6. Limiting spline; 601. Guide block; 7. Unlocking turntable; 701. Limiting sleeve; 702. Limiting groove; 8. Limiting slide bar; 801. Compression spring. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example 1: Please refer to Figures 1-3 The present invention provides the following technical solution: a leak-proof oil extraction valve, comprising a valve body 1, a connecting flange 101 on the top of the valve body 1, a valve cover 2 on the outer wall of the connecting flange 101, a valve stem 3 on the outer wall of the valve cover 2, a handwheel 301 fixedly installed at the end of the valve stem 3, a leak-proof structure on the outer wall of the valve body 1, the leak-proof structure comprising a sealing flange 5 disposed on the inner wall of the connecting flange 101 and the valve cover 2, a sealing protrusion 201 disposed on the inner wall of the valve cover 2, and a sealing gasket 4 disposed on the inner wall of the valve cover 2.

[0020] like Figures 1-3 As shown, the valve cover 2 has a U-shaped cross-section and wraps around the connecting flange 101. The valve cover 2 is fixedly installed to the connecting flange 101 by bolts. The sealing protrusion 201 has a frustum-shaped design and abuts against the inner wall of the connecting flange 101.

[0021] like Figure 2 and Figure 3 As shown, the sealing gasket 4 is located between the connecting flange 101 and the valve cover 2, and the sealing gasket 4 covers the inner wall of the valve cover 2 and the outer wall of the sealing protrusion 201. The sealing gasket 4 is made of rubber. The sealing flange 5 is designed in a circular shape and is evenly distributed. The diameter of the sealing flange 5 gradually increases radially along the connecting flange 101 and the valve cover 2.

[0022] The leak-proof structure achieves high-efficiency sealing through a multi-seal design. When the connecting flange 101 is assembled with the valve cover 2, the U-shaped valve cover 2 wraps around the connecting flange 101 and is fixed with bolts, so that the frustum-shaped sealing protrusion 201 on the inner wall of the valve cover 2 tightly abuts against the inner wall of the connecting flange 101, forming the first seal. The rubber sealing gasket 4 covers the space between the connecting flange 101 and the valve cover 2, and at the same time fits against the inner wall of the valve cover 2 and the outer wall of the sealing protrusion 201. Under the action of bolt tightening force, it undergoes elastic deformation, filling the gap between the contact surfaces to form the second seal. The annular sealing flanges 5 on the inner walls of the connecting flange 101 and the valve cover 2 are evenly distributed and their diameter gradually increases radially. Under the action of assembly pressure, they interlock and embed with each other to form a multi-labyrinth seal, further blocking the fluid leakage path. The synergistic effect of the triple seals greatly improves the sealing reliability.

[0023] Example 2: Please refer to Figures 1-6Based on Embodiment 1, a limiting structure is also disclosed, the specific structure of which is as follows: The top of the valve cover 2 is provided with a limiting structure to prevent the valve stem 3 from rotating accidentally. The limiting structure includes a limiting spline 6 fixedly installed on the top of the valve cover 2, and a guide block 601 is provided at the end of the limiting spline 6. An unlocking turntable 7 is slidably installed on the outer wall of the valve stem 3, and a limiting sleeve 701 is provided at the center of the unlocking turntable 7. A limiting groove 702 is opened on the outer wall of the limiting sleeve 701. A limiting slide rod 8 is fixedly installed on the outer wall of the unlocking turntable 7, and a compression spring 801 is sleeved on the outer wall of the limiting slide rod 8. The guide block 601 is cylindrical in shape and is located away from the limiting spline. One end of the 6 is designed with an angled corner, and the center of the limiting spline 6 and the guide block 601 is provided with a through hole for the valve stem 3 to pass through. The unlocking turntable 7 is located between the handwheel 301 and the limiting spline 6. The limiting sleeve 701 is slidably connected to the valve stem 3, and the outer diameter of the limiting sleeve 701 is larger than the diameter of the limiting spline 6. The limiting groove 702 is adapted to the limiting spline 6. The limiting slide rod 8 has a T-shaped cross section and is slidably connected to the handwheel 301. The limiting slide rod 8 is set at an equal angle at the top of the unlocking turntable 7. The top of the compression spring 801 abuts against the bottom outer wall of the handwheel 301, and the bottom of the compression spring 801 abuts against the top outer wall of the unlocking turntable 7.

[0024] The limiting structure prevents the valve stem 3 from rotating accidentally through mechanical locking. Under normal conditions, the compression spring 801 is in a compressed state, and its elastic force pushes the unlocking turntable 7 towards the limiting spline 6, so that the limiting groove 702 on the outer wall of the limiting sleeve 701 precisely engages with the limiting spline 6. The spline engagement restricts the rotation of the valve stem 3, thereby locking the handwheel 301. When it is necessary to operate the valve, the unlocking turntable 7 is pulled upward, which drives the limiting slide bar 8 to slide along the handwheel 301 and compress the compression spring 801, so that the limiting groove 702 separates from the limiting spline 6, releasing the locked state. At this time, the handwheel 301 can be rotated to control the opening and closing of the valve through the valve stem 3. After the operation is completed, the unlocking turntable 7 is released, the compression spring 801 returns to its original position and pushes the unlocking turntable 7 downward. The limiting groove 702 engages with the limiting spline 6 again to restore the lock. The angled design of the guide block 601 ensures that the limiting groove 702 and the limiting spline 6 can be smoothly aligned and engaged.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A leak-proof oil extraction valve, comprising a valve body (1), wherein a connecting flange (101) is provided on the top of the valve body (1), and a valve cover (2) is provided on the outer wall of the connecting flange (101), and a valve stem (3) is provided on the outer wall of the valve cover (2), wherein a handwheel (301) is fixedly installed at the end of the valve stem (3), characterized in that: The valve body (1) has an anti-leakage structure on its outer wall. The anti-leakage structure includes a sealing flange (5) provided on the inner wall of the connecting flange (101) and the valve cover (2). The valve cover (2) has a sealing protrusion (201) on its inner wall and a sealing gasket (4) on its inner wall. The valve cover (2) has a limiting structure on its top to prevent the valve stem (3) from rotating accidentally.

2. The leak-proof oil extraction valve according to claim 1, characterized in that: The valve cover (2) has a U-shaped cross section and wraps around the connecting flange (101). The valve cover (2) is fixedly installed to the connecting flange (101) by bolts. The sealing protrusion (201) has a frustum-shaped design and abuts against the inner wall of the connecting flange (101).

3. The leak-proof oil extraction valve according to claim 1, characterized in that: The sealing gasket (4) is located between the connecting flange (101) and the valve cover (2), and the sealing gasket (4) covers the inner wall of the valve cover (2) and the outer wall of the sealing protrusion (201). The sealing gasket (4) is made of rubber. The sealing flange (5) is designed in a circular shape, and the sealing flanges (5) are distributed at equal intervals. The diameter of the sealing flange (5) gradually increases radially along the connecting flange (101) and the valve cover (2).

4. The leak-proof oil extraction valve according to claim 1, characterized in that: The limiting structure includes a limiting spline (6) fixedly installed on the top of the valve cover (2), and a guide block (601) is provided at the end of the limiting spline (6). An unlocking turntable (7) is slidably installed on the outer wall of the valve stem (3), and a limiting sleeve (701) is provided at the center of the unlocking turntable (7). A limiting groove (702) is opened on the outer wall of the limiting sleeve (701). A limiting slide rod (8) is fixedly installed on the outer wall of the unlocking turntable (7), and a compression spring (801) is sleeved on the outer wall of the limiting slide rod (8).

5. A leak-proof oil extraction valve according to claim 4, characterized in that: The guide block (601) is cylindrical in shape, and the corner of the guide block (601) away from the limiting spline (6) is angled. A through hole for the valve stem (3) to pass through is provided at the center of the limiting spline (6) and the guide block (601).

6. A leak-proof oil extraction valve according to claim 4, characterized in that: The unlocking turntable (7) is located between the handwheel (301) and the limiting spline (6). The limiting sleeve (701) is slidably connected to the valve stem (3), and the outer diameter of the limiting sleeve (701) is larger than the diameter of the limiting spline (6). The limiting groove (702) is adapted to the limiting spline (6).

7. A leak-proof oil extraction valve according to claim 4, characterized in that: The limiting slide bar (8) has a T-shaped cross section and is slidably connected to the handwheel (301). The limiting slide bar (8) is set at an equal angle on the top of the unlocking turntable (7). The top of the compression spring (801) abuts against the bottom outer wall of the handwheel (301), and the bottom of the compression spring (801) abuts against the top outer wall of the unlocking turntable (7).

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