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CN-224201237-U - Antitheft valve for oil extraction wellhead

CN224201237UCN 224201237 UCN224201237 UCN 224201237UCN-224201237-U

Abstract

The utility model relates to the technical field of anti-theft valves, in particular to an anti-theft valve for an oil extraction 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, wherein the valve cover is connected with the upper part of the valve body through threads, and the rotating device is arranged in the valve cover; the utility model discloses an anti-theft valve for an oil extraction wellhead, which mainly comprises a key for rotating an anti-theft hole to drive a limit linkage rod to slide in a limit through groove, wherein a protruding part at the top end of the limit linkage rod slides in a sliding clamping groove and is contracted inwards through the limit through groove and the sliding clamping groove, two ends of the limit linkage rod which are arranged in a mirror symmetry manner squeeze a spring in an anti-theft cylinder, and a limit block arranged at the bottom end of the limit linkage rod limits the valve rod at the moment to realize an anti-theft effect.

Inventors

  • QI ZHENGJUN
  • SHEN WENHE
  • DING TINGTING

Assignees

  • 盐城市煜洋石油机械有限公司

Dates

Publication Date
20260505
Application Date
20250707

Claims (7)

  1. 1. The anti-theft valve for the oil extraction wellhead comprises a valve body (1), a valve cover (2), a hand wheel (3), a valve rod cover (4), an anti-theft device (5), a valve rod (6) and a rotating device (7), wherein the valve cover (2) is connected with the upper side of the valve body (1) in a threaded manner, and the rotating device (7) is arranged in the valve cover (2); The anti-theft device is characterized in that a hand wheel (3) is fixedly clamped at the middle part of the rotating device (7), the inner cavity of the rotating device (7) is fixedly connected with a valve rod (6), the top end of the rotating device (7) is fixedly connected with a valve rod cover (4), and the top end of the valve rod cover (4) is fixedly connected with an anti-theft device (5).
  2. 2. The antitheft valve for the oil extraction wellhead is characterized in that the diameter of the end face of the valve rod cover (4) is larger than that of the end face of the valve rod (6), and the length of the valve rod cover (4) is the same as the minimum diameter length of the circular end face on the outer side of the valve body (1).
  3. 3. The antitheft valve for the oil extraction wellhead according to claim 1, characterized in that the antitheft device (5) comprises a through hole (501), an antitheft cylinder (502), an antitheft lock hole (503), a limiting linkage rod (504), a bearing (505), a limiting block (506), a fixed clamping seat (507), a limiting through groove (508), a bearing hole (509), a spring (510) and a sliding clamping groove (511).
  4. 4. The antitheft valve for the oil extraction wellhead is characterized in that a through hole (501) is formed in the top end of the antitheft device (5), an antitheft cylinder (502) is arranged in the through hole (501), a bearing (505) is arranged on the bottom end face of the antitheft cylinder (502) in a connecting mode, an antitheft lock hole (503) is formed in the antitheft cylinder (502), limit linkage rods (504) are symmetrically arranged at two ends of the antitheft cylinder (502) in a mirror symmetry mode, springs (510) are arranged between the limit linkage rods (504) in a mirror symmetry mode, and limiting blocks (506) are fixedly connected to the bottom end face of the limit linkage rods (504).
  5. 5. The antitheft valve for the oil extraction wellhead is characterized in that the limiting linkage rod (504) is arranged in a limiting through groove (508) in a penetrating mode, the limiting through groove (508) is arranged on the end face of the fixed clamping seat (507) in a mirror symmetry mode, a bearing hole (509) is formed in the center point of the fixed clamping seat (507), and a bearing (505) is arranged in a connecting mode through the bearing hole (509).
  6. 6. The antitheft valve for the oil extraction wellhead according to claim 3, characterized in that the upper end face of the antitheft lock hole (503) and the upper end face of the antitheft device (5) are on the same plane, and the bottom end face of the antitheft device (5) is provided with sliding clamping grooves (511) in mirror symmetry.
  7. 7. The antitheft valve for the oil extraction wellhead of claim 5, wherein the protruding height of the top end of the limiting linkage rod (504) is the same as the height of the groove of the sliding clamping groove (511), and the top end of the limiting linkage rod (504) slides in the sliding clamping groove (511).

Description

Antitheft valve for oil extraction wellhead Technical Field The utility model relates to the field of anti-theft valves, in particular to an anti-theft valve for an oil extraction wellhead. Background The utility model has the beneficial effects that the anti-theft lock is driven to rotate in the anti-theft block by a key through adding the structure of the anti-theft lock and the stud, and drives the stud to rotate, and drives the sleeve to slide horizontally leftwards by a threaded connection structure of the stud and the sleeve rod and a horizontal sliding limiting structure of the limiting block to prop against the upper right of the closed valve block, so that the valve body is prevented from being opened by lifting. In the scheme, although the anti-theft lock has a certain positive effect on theft prevention, the anti-theft lock is easy to damage by a thief using a tool due to the external anti-theft structure, so that petroleum is stolen, and the anti-theft effect has a certain defect. Therefore, the utility model provides a stable supporting structure for a fireproof glass partition, which is used for solving the problems. Disclosure of utility model The utility model aims to provide an anti-theft valve for an oil extraction wellhead, which aims to solve the problems in the background technology. The utility model provides a technical scheme that the antitheft valve for the oil extraction wellhead mainly comprises a valve body, a valve cover, a hand wheel, a valve rod cover, an antitheft device, a valve rod and a rotating device, wherein the valve cover is connected with the upper side of the valve body in a threaded manner, and the rotating device is arranged in the valve cover; Preferably, the middle part of the rotating device is fixedly clamped with a hand wheel, the inner cavity of the rotating device is fixedly connected with a valve rod, the top end of the rotating device is fixedly connected with a valve rod cover, and the top end of the valve rod cover is fixedly connected with an anti-theft device. Preferably, the diameter of the end face of the valve rod cover is larger than that of the end face of the valve rod, and the length of the valve rod cover is the same as the minimum diameter length of the circular end face on the outer side of the valve body. Preferably, the anti-theft device comprises a through hole, an anti-theft barrel, an anti-theft lock hole, a limiting linkage rod, a bearing, a limiting block, a fixing clamping seat, a limiting through groove, a bearing hole, a spring and a sliding clamping groove. Preferably, the top end of the anti-theft device is provided with a through hole, an anti-theft cylinder is arranged in the through hole, the bottom end surface of the anti-theft cylinder is connected with a bearing, an anti-theft lock hole is arranged in the anti-theft cylinder, two ends of the anti-theft cylinder are symmetrically arranged in a mirror image mode, a spring is arranged between the symmetrically arranged limiting linkage rods, and the bottom end surface of the limiting linkage rod is fixedly connected with a limiting block. Preferably, the limiting linkage rod penetrates through and is arranged in the limiting through groove, the limiting through groove is arranged on the end face of the fixing clamping seat in a mirror symmetry mode, a bearing hole is formed in the center point of the fixing clamping seat, and a bearing is arranged in the bearing hole in a connecting mode. Preferably, the upper end face of the anti-theft lock hole and the upper end face of the anti-theft device are arranged on the same plane, and the bottom end face of the anti-theft device is provided with sliding clamping grooves in mirror symmetry. Preferably, the protruding height of the top end of the limiting linkage rod is the same as the height of the groove of the sliding clamping groove, and the top end of the limiting linkage rod slides in the sliding clamping groove. Compared with the prior art, the utility model has the beneficial effects that: The utility model provides an anti-theft valve for an oil extraction wellhead, which mainly rotates an anti-theft hole through a key to drive a limit linkage rod to slide in a limit through groove, a protruding part at the top end of the limit linkage rod slides in a slide clamping groove and is contracted inwards through the limit through groove and the slide clamping groove, the spring is extruded in the anti-theft barrel at the both ends of the spacing gangbar that mirror symmetry set up, and the stopper that spacing gangbar bottom set up carries out spacingly to the valve rod this moment, realizes the effect of theftproof, through theftproof lockhole up end and anti-theft device's up end on the coplanar, makes anti-theft device built-in, realizes having the effect of better theftproof effect. Drawings FIG. 1 is a schematic diagram of the structure of the present utility model; FIG. 2 is a cross-sectional view of the structure of the pres