Anti-theft valve for oil extraction wellhead

Abstract

The utility model relates to the technical field of anti-theft valves, in particular to an anti-theft valve for an oil production wellhead, which comprises a valve body, a valve cover, a hand wheel, a valve rod cover, an anti-theft device, a valve rod and a rotating device, a hand wheel is clamped and fixed to the middle of the rotating device, and an inner cavity of the rotating device is fixedly connected with a valve rod. According to the anti-theft valve for the oil extraction wellhead, the anti-theft hole is rotated through a key, the limiting linkage rod is driven to slide in the limiting through groove, the protruding part at the top end of the limiting linkage rod slides in the sliding clamping groove, the anti-theft device is fixedly connected to the top end of the valve rod cover, and the anti-theft device is fixedly connected to the top end of the anti-theft hole. A limiting through groove and a sliding clamping groove contract inwards, the two ends of a limiting linkage rod arranged in a mirror symmetry mode extrude a spring in an anti-theft cylinder, at the moment, a limiting block arranged at the bottom end of the limiting linkage rod limits the valve rod, and the anti-theft effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of anti-theft valves, specifically an anti-theft valve for oil wellheads. Background Technology

[0002] A Chinese patent document with publication number CN216430677U discloses an anti-theft valve for oil wellheads, including a valve body. Valve pipes connected to pipelines are fixedly connected to the left and right sides of the valve body. A fixing frame is fixedly connected to the top of the valve body. A valve block for opening and closing the valve body is slidably connected inside the fixing frame. The beneficial effect is that by adding an anti-theft lock and a stud, the anti-theft lock can be rotated inside the anti-theft block by a key, which in turn rotates the stud. Through the screw connection between the stud and the sleeve rod, and the horizontal sliding restriction structure of the limiting block, the sleeve rod is driven to slide horizontally to the left, abutting the upper right side of the closed valve block, preventing the valve block from rising and opening the valve body.

[0003] While the above-mentioned solutions have a certain positive effect on theft prevention, the external anti-theft structure makes it easy for thieves to use tools to damage the external anti-theft lock, leading to the theft of oil. Therefore, the anti-theft effect has certain defects.

[0004] Therefore, this utility model proposes a fireproof glass partition stable support structure to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide an anti-theft valve for oil wellheads to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an anti-theft valve for oil wellheads mainly includes a valve body, a valve cover, a handwheel, a valve stem cover, an anti-theft device, a valve stem, and a rotating device. The valve cover is threadedly connected to the top of the valve body, and the rotating device is built into the valve cover.

[0007] Preferably, a handwheel is snapped and fixed in the middle part of the rotating device, and a valve stem is fixedly connected to the inner cavity of the rotating device; a valve stem cover is fixedly connected to the top of the rotating device, and an anti-theft device is fixedly connected to the top of the valve stem cover.

[0008] Preferably, the diameter of the valve stem cover end face is greater than the diameter of the valve stem end face; the length of the valve stem cover is the same as the minimum diameter of the outer circular end face of the valve body.

[0009] Preferably, the anti-theft device includes a through hole, an anti-theft cylinder, an anti-theft lock hole, a limiting linkage rod, a bearing, a limiting block, a fixed card seat, a limiting through groove, a bearing hole, a spring, and a sliding card groove.

[0010] Preferably, the top of the anti-theft device is provided with a through hole, an anti-theft cylinder is placed in the through hole, a bearing is connected to the bottom end face of the anti-theft cylinder, an anti-theft lock hole is provided inside the anti-theft cylinder, limit linkage rods are placed mirror-symmetrically at both ends of the anti-theft cylinder, and a spring is placed between the mirror-symmetrically arranged limit linkage rods; a limit block is fixedly connected to the bottom end face of the limit linkage rod.

[0011] Preferably, the limiting linkage rod is placed through the limiting through groove, the limiting through groove is mirror-symmetrically arranged on the end face of the fixed card seat, the center point of the fixed card seat is provided with a bearing hole, and a bearing is connected to the bearing hole.

[0012] Preferably, the upper surface of the anti-theft lock hole and the upper surface of the anti-theft device are on the same plane, and the bottom surface of the anti-theft device is provided with a sliding groove in a mirror-symmetric manner.

[0013] Preferably, the protruding height of the top of the limiting linkage rod is the same as the groove height of the sliding slot, and the top of the limiting linkage rod slides within the sliding slot.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] The anti-theft valve for oil wellheads proposed in this utility model mainly works by turning the anti-theft hole with a key, which drives the limiting linkage rod to slide in the limiting through groove. The protruding part at the top of the limiting linkage rod slides in the sliding slot. By contracting inward through the limiting through groove and the sliding slot, the two ends of the mirror-symmetrically arranged limiting linkage rod compress the spring in the anti-theft cylinder. At this time, the limiting block set at the bottom of the limiting linkage rod limits the valve rod, thus achieving the anti-theft function. Since the upper end face of the anti-theft lock hole is on the same plane as the upper end face of the anti-theft device, the anti-theft device is built-in, achieving a better anti-theft effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional view of the structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the anti-theft device of this utility model;

[0019] Figure 4 This is a schematic diagram of the connection structure of the anti-theft device of this utility model.

[0020] In the diagram: Valve body 1, Valve cover 2, Handwheel 3, Valve stem cover 4, Anti-theft device 5, Valve stem 6, Rotating device 7, Through hole 501, Anti-theft cylinder 502, Anti-theft lock hole 503, Limit linkage rod 504, Bearing 505, Limit block 506, Fixed card seat 507, Limit through groove 508, Bearing hole 509, Spring 510 and Sliding slot 511. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] The present invention provides the following embodiments:

[0023] Example 1, please refer to Figures 1-2 An anti-theft valve for oil wellheads includes a valve body 1, a valve cover 2, a handwheel 3, a valve stem cover 4, an anti-theft device 5, a valve stem 6, and a rotating device 7. The valve cover 2 is threadedly connected to the top of the valve body 1, and the rotating device 7 is built into the valve cover 2.

[0024] A handwheel 3 is snapped and fixed in the middle part of the rotating device 7, and a valve stem 6 is fixedly connected to the inner cavity of the rotating device 7; a valve stem cover 4 is fixedly connected to the top of the rotating device 7, and an anti-theft device 5 is fixedly connected to the top of the valve stem cover 4; the diameter of the end face of the valve stem cover 4 is greater than the diameter of the end face of the valve stem 6; the length of the valve stem cover 4 is the same as the minimum diameter of the outer circular end face of the valve body 1.

[0025] In actual use, by rotating the handwheel 3 counterclockwise, the rotating device 7 is driven to rotate, and the valve stem 6 moves upward. When the handwheel 3 is rotated clockwise, the rotating device 7 is driven to rotate, and the valve stem 6 moves downward to the bottom. At this time, the anti-theft device 5 is rotated to limit the top of the valve stem 6.

[0026] Example 2, based on Example 1, please refer to... Figure 3 The anti-theft device 5 includes a through hole 501, an anti-theft cylinder 502, an anti-theft lock hole 503, a limit linkage rod 504, a bearing 505, a limit block 506, a fixed card seat 507, a limit through groove 508, a bearing hole 509, a spring 510, and a sliding card groove 511.

[0027] The anti-theft device 5 has a through hole 501 at its top, and an anti-theft cylinder 502 is placed inside the through hole 501. A bearing 505 is connected to the bottom end of the anti-theft cylinder 502. An anti-theft lock hole 503 is provided inside the anti-theft cylinder 502. Limiting linkage rods 504 are placed in mirror image symmetrically at both ends of the anti-theft cylinder 502. A spring 510 is placed between the mirror image symmetrically placed limiting linkage rods 504. A limiting block 506 is fixedly connected to the bottom end of the limiting linkage rod 504.

[0028] In actual use, the key is inserted into the anti-theft lock hole 503 and rotated counterclockwise, which drives the anti-theft cylinder 502 to rotate under the action of the bearing 505. The limit linkage rods 504, which are locked at both ends of the anti-theft cylinder 502, rotate counterclockwise. At this time, the limit block 506 at the bottom of the limit linkage rod 504 limits the top of the valve stem 6.

[0029] Example 3, based on Example 2, please refer to... Figure 4 The limiting linkage rod 504 is placed through the limiting through groove 508. The limiting through groove 508 is mirror-symmetrically arranged on the end face of the fixed card seat 507. The center point of the fixed card seat 507 is provided with a bearing hole 509, and a bearing 505 is connected to the bearing hole 509.

[0030] The upper surface of the anti-theft lock hole 503 is on the same plane as the upper surface of the anti-theft device 5. The bottom surface of the anti-theft device 5 is mirror-symmetrically provided with a sliding groove 511. The protruding height of the top of the limiting linkage rod 504 is the same as the groove height of the sliding groove 511, and the top of the limiting linkage rod 504 slides in the sliding groove 511.

[0031] In actual use, since the limiting through groove 508 and the sliding slot 511 are inwardly retracted, when the anti-theft cylinder 502 is rotated, the limiting linkage rod 504 will retract inward under the action of the limiting through groove 508 and the sliding slot 511. The inner end of the limiting linkage rod 504, which is mirror-symmetrically arranged, presses against the spring 510 placed between the two, thereby realizing the inward retraction of the limiting linkage rod 504. At this time, the limiting block 506 at the bottom of the limiting linkage rod 504 has an obstructive effect on the movement of the valve stem 6.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An anti-theft valve for oil wellheads, comprising a valve body (1), a valve cover (2), a handwheel (3), a valve stem cover (4), an anti-theft device (5), a valve stem (6), and a rotating device (7), wherein the valve cover (2) is threadedly connected to the upper part of the valve body (1), and the rotating device (7) is built into the valve cover (2); Its features are: The middle part of the rotating device (7) is fixedly fitted with a handwheel (3), and the inner cavity of the rotating device (7) is fixedly connected with a valve stem (6); the top of the rotating device (7) is fixedly connected with a valve stem cover (4), and the top of the valve stem cover (4) is fixedly connected with an anti-theft device (5).

2. The anti-theft valve for oil wellheads according to claim 1, characterized in that: The diameter of the end face of the valve stem cover (4) is greater than the diameter of the end face of the valve stem (6); the length of the valve stem cover (4) is the same as the minimum diameter of the outer circular end face of the valve body (1).

3. The anti-theft valve for oil wellheads according to claim 1, characterized in that: The anti-theft device (5) includes a through hole (501), an anti-theft cylinder (502), an anti-theft lock hole (503), a limit linkage rod (504), a bearing (505), a limit block (506), a fixed card seat (507), a limit through groove (508), a bearing hole (509), a spring (510), and a sliding card groove (511).

4. The anti-theft valve for oil wellheads according to claim 3, characterized in that: The anti-theft device (5) has a through hole (501) at the top, an anti-theft cylinder (502) is placed inside the through hole (501), a bearing (505) is connected to the bottom end of the anti-theft cylinder (502), an anti-theft lock hole (503) is provided inside the anti-theft cylinder (502), and limit linkage rods (504) are placed symmetrically at both ends of the anti-theft cylinder (502). A spring (510) is placed between the symmetrically arranged limit linkage rods (504); a limit block (506) is fixedly connected to the bottom end of the limit linkage rod (504).

5. The anti-theft valve for oil wellheads according to claim 3, characterized in that: The limiting linkage rod (504) is placed through the limiting through groove (508). The limiting through groove (508) is mirror-symmetrically arranged on the end face of the fixed card seat (507). The center point of the fixed card seat (507) is provided with a bearing hole (509), and a bearing (505) is connected to the bearing hole (509).

6. The anti-theft valve for oil wellheads according to claim 3, characterized in that: The upper surface of the anti-theft lock hole (503) and the upper surface of the anti-theft device (5) are on the same plane, and the bottom surface of the anti-theft device (5) is provided with a sliding slot (511) in a mirror symmetrical manner.

7. The anti-theft valve for oil wellheads according to claim 5, characterized in that: The protruding height of the top of the limiting linkage rod (504) is the same as the groove height of the sliding slot (511), and the top of the limiting linkage rod (504) slides within the sliding slot (511).

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