Manual auxiliary opening device for safety shut-off valve of gas field wellhead

Abstract

The utility model discloses a manual auxiliary opening device for gas field wellhead safety cut -out valve, including support, the support is hollow cylindrical, support axial lower part connects cut -out valve, and the inside sleeve joint screw rod of support, and the top of screw rod penetrates and stretches out support, and the top axle of screw rod is connected hand wheel. The utility model discloses have solved the current wellhead safety cut -out valve after maintenance, debugging or system pressure -loss, need to open it again, once wellhead cut -out valve control system or driver appears the situation of abnormality, will lead to the problem of valve unable normal opening.

Description

Technical Field

[0001] This utility model belongs to the field of shut-off valve technology, specifically relating to a manual auxiliary opening device for a gas field wellhead safety shut-off valve. Background Technology

[0002] Gas field wellhead safety shut-off valves are important safety protection devices at gas production sites. They mainly function to protect against high and low leakage in gas well production, remotely switch on / off, and automatically switch production gaps based on the operating conditions at the gas field wellhead. They can automatically shut off the pipeline when it is over-pressured or under-pressured, or remotely shut off the pipeline through the intervention of the control system, thereby protecting downstream pipelines and wellhead equipment. This is of great significance for ensuring the safe production of the site.

[0003] Gas field wellhead safety shut-off valves are typically installed between the gas wellhead and surface station equipment or gas pipelines. When the over / under pressure control unit detects that the pressure change in the pipeline exceeds the allowable value, the pressure sensor of the over / under pressure control unit transmits the pressure signal to the push rod, causing the push rod to move. The original balance of the balance block is broken, and the balance bar rotates around the balance bar pin. The pin is pushed to move, thereby breaking the original locked state of the balance block. The energy storage spring resets, driving the valve core to move, and the valve closes. When the gas transmission pressure (signal pressure) reaches or exceeds the set pressure (the rated bearing capacity of the station equipment or gas pipeline) or when the station pipeline experiences a sudden pressure drop due to rupture and leakage, the control system will quickly and automatically close the hydraulic shut-off valve to cut off the gas supply at the wellhead, thereby automatically protecting the surface station equipment and gas pipelines.

[0004] Gas wells primarily utilize remote-controlled emergency shut-off valves and wellhead electromagnetic shut-off valves to achieve emergency shut-off and remote well opening / closing functions. These valves automatically close when pipeline pressure is abnormal, ensuring safety and offering advantages in operational stability, reliability, and sealing. However, existing wellhead safety shut-off valves require reopening after maintenance, commissioning, or system depressurization. If the wellhead shut-off valve control system or actuator malfunctions, the valve may fail to open normally, necessitating manual opening on-site. This interruption of system operation poses a significant threat to the safe operation of pipelines and related equipment, potentially triggering a chain reaction of abnormal pressure and interrupted media delivery, or even escalating into a safety production accident that impacts production operations. Utility Model Content

[0005] The purpose of this invention is to provide a manual auxiliary opening device for gas field wellhead safety shut-off valves, which solves the problem that existing wellhead safety shut-off valves need to be reopened after maintenance, debugging, or system pressure loss, and that the valve cannot be opened normally if the wellhead shut-off valve control system or actuator malfunctions.

[0006] The technical solution adopted in this utility model is a manual auxiliary opening device for a gas field wellhead safety shut-off valve, including a support, which is a hollow cylinder. The shut-off valve is connected to the lower part of the support shaft. A screw rod is sleeved inside the support, and the top of the screw rod extends through the support. A handwheel is connected to the top axis of the screw rod.

[0007] The technical solution of this utility model is also characterized by the following: The upper part of the support is equipped with a three-tiered stepped structure, with the diameter of each tier increasing from top to bottom.

[0008] The bottom of the support is provided with a single-step structure, and the diameter of the single-step structure is not less than the diameter of the bottom layer of the three-step structure.

[0009] The inner wall of the first-stage stepped structure is provided with a fixing thread, which matches the outer thread on the top of the wellhead shut-off valve.

[0010] The inner wall of the three-step structure has internal threads, which are connected to the external threads on the outer surface of the lead screw.

[0011] The bottom of the lead screw is connected to the bearing housing, and a top rod is vertically installed in the center of the bearing housing. The diameter of the bearing housing matches the diameter of the bottom layer of the three-stage stepped structure, and the bearing housing can move towards the bottom of the support along with the lead screw.

[0012] Several through holes are evenly opened around the outer wall of the first-stage stepped structure. Limiting screws are fitted into the through holes to fix the support to the top of the shut-off valve.

[0013] The handwheel includes an outer ring and an inner disc, as well as several support rods connecting the outer ring and the inner disc. The support rods are evenly distributed circumferentially between the outer ring and the inner disc, and the angles between the support rods are the same.

[0014] A connecting hole is made at the top center of the lead screw, and a corresponding fixing hole is made at the center of the inner disc. Fixing nuts are fitted into the connecting hole and the fixing hole, and the handwheel is fixed to the outer side of the top of the lead screw by the fixing nuts.

[0015] Several weight-reducing grooves are opened through the middle of the outer wall of the support, and the weight-reducing grooves are evenly distributed in the middle of the outer wall of the support 100.

[0016] The outer ring of the handwheel is fitted with an anti-slip sleeve.

[0017] The beneficial effects of this utility model are that the manual auxiliary opening device for the gas field wellhead safety shut-off valve has the following advantages. (1) Reliable forced opening: Through the threaded transmission, the rotational force of the handwheel is converted into a huge linear thrust, which is directly applied to the valve stem or valve plate of the shut-off valve through the push rod, which can effectively overcome the pre-tightening force and medium pressure in the valve closed state and realize forced opening.

[0018] (2) The structure is simple and compact; the whole set of tools consists of a small number of parts, the structure is reasonably designed, the functions of each component are clear, the manufacturing cost is low, and the failure rate is low.

[0019] (3) Convenient and safe operation; the tool is directly fixed to the valve by threads, ensuring a stable connection. Manual operation requires no external power and is highly adaptable. The bearing design between the push rod and the lead screw avoids torsional damage, making the operation process safe and controllable.

[0020] (4) Portable and practical; the weight reduction groove design reduces the weight of the tool, making it very easy to carry to the well site for use, which is conducive to its promotion and popularization. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model; Figure 2 This is a bottom view of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model; Figure 3 This is a side view of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model; Figure 4 This is a utility model Figure 3 Sectional view along the middle AA.

[0023] In the diagram, 100 is the support, 101 is the fixing thread, 102 is the weight reduction groove, 200 is the lead screw, 300 is the handwheel, 400 is the fixing nut, 500 is the push rod, and 600 is the bearing housing. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Example 1 This utility model relates to a manual auxiliary opening device for a gas field wellhead safety shut-off valve, such as... Figure 1 and Figure 2As shown, it includes a support 100, which is a hollow cylinder. The support 100 is connected to a shut-off valve at its axial lower part. A screw 200 is sleeved inside the support 100. The top of the screw 200 extends through the support 100, and a handwheel 300 is connected to the top axis of the screw 200.

[0030] This embodiment represents only a preferred implementation of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model. Any manual auxiliary opening device for the gas field wellhead safety shut-off valve designed with similar technical features to this utility model will fall within the protection scope of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model.

[0031] Example 2 This utility model relates to a manual auxiliary opening device for a gas field wellhead safety shut-off valve, comprising a support 100, which is a hollow cylinder. The shut-off valve is connected axially to the lower part of the support 100. A lead screw 200 is sleeved inside the support 100, with its top extending through the support 100. A handwheel 300 is axially connected to the top of the lead screw 200. Based on embodiment 1, this embodiment features a three-tiered stepped structure on the upper part of the support 100, with the diameter increasing progressively from top to bottom.

[0032] This embodiment represents only a preferred implementation of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model. Any manual auxiliary opening device for the gas field wellhead safety shut-off valve designed with similar technical features to this utility model will fall within the protection scope of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model.

[0033] Example 3 This utility model relates to a manual auxiliary opening device for a gas field wellhead safety shut-off valve, comprising a support 100, which is a hollow cylinder. The shut-off valve is connected axially to the lower part of the support 100. A threaded rod 200 is sleeved inside the support 100, with its top extending through the support 100. A handwheel 300 is axially connected to the top of the threaded rod 200. The upper part of the support 100 has a three-tiered stepped structure, with the diameter increasing progressively from top to bottom. Based on embodiment 2, this embodiment adds a single-tiered stepped structure at the bottom of the support 100, the diameter of which is not less than the diameter of the lowest tier of the three-tiered structure.

[0034] This embodiment represents only a preferred implementation of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model. Any manual auxiliary opening device for the gas field wellhead safety shut-off valve designed with similar technical features to this utility model will fall within the protection scope of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model.

[0035] Example 4 This utility model relates to a manual auxiliary opening device for a gas field wellhead safety shut-off valve, comprising a support 100, which is a hollow cylinder. The shut-off valve is axially connected to the lower part of the support 100. A threaded rod 200 is sleeved inside the support 100, with its top extending through the support 100. A handwheel 300 is axially connected to the top of the threaded rod 200. The upper part of the support 100 has a three-stage stepped structure, with the diameter increasing progressively from top to bottom. The bottom of the support 100 has a single-stage stepped structure, the diameter of which is not less than the diameter of the lowest stage of the three-stage stepped structure. Based on embodiment 3, this embodiment features a fixing thread 101 on the inner wall of the single-stage stepped structure. The fixing thread 101 matches the outer thread on the top of the wellhead shut-off valve. During use, the fixing thread 101 facilitates the disassembly and installation of the support 100 on the wellhead shut-off valve.

[0036] This embodiment represents only a preferred implementation of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model. Any manual auxiliary opening device for the gas field wellhead safety shut-off valve designed with similar technical features to this utility model will fall within the protection scope of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model.

[0037] Example 5 This utility model relates to a manual auxiliary opening device for a gas field wellhead safety shut-off valve, comprising a support 100, which is a hollow cylinder. The shut-off valve is axially connected to the lower part of the support 100. A threaded rod 200 is sleeved inside the support 100, with its top extending through the support 100. A handwheel 300 is axially connected to the top of the threaded rod 200. The upper part of the support 100 has a three-stage stepped structure, with the diameter increasing progressively from top to bottom. The bottom of the support 100 has a single-stage stepped structure, the diameter of which is not less than the diameter of the lowest stage of the three-stage stepped structure. A fixing thread 101 is formed on the inner wall of the single-stage stepped structure, matching the outer thread on the top of the wellhead shut-off valve. During use, the fixing thread 101 facilitates the disassembly and installation of the support 100 on the wellhead shut-off valve. Based on embodiment 4, this embodiment... Figure 3 and Figure 4 As shown, the inner wall of the three-stage stepped structure has an internal thread, which is connected to the external thread on the outer surface of the lead screw 200.

[0038] This embodiment represents only a preferred implementation of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model. Any manual auxiliary opening device for the gas field wellhead safety shut-off valve designed with similar technical features to this utility model will fall within the protection scope of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model.

[0039] Example 6 This utility model relates to a manual auxiliary opening device for a gas field wellhead safety shut-off valve, comprising a support 100, which is a hollow cylinder. The shut-off valve is axially connected to the lower part of the support 100. A lead screw 200 is sleeved inside the support 100, with its top extending through the support 100. A handwheel 300 is connected to the top axis of the lead screw 200. The upper part of the support 100 has a three-stage stepped structure, with the diameter increasing progressively from top to bottom. The bottom of the support 100 has a single-stage stepped structure, the diameter of which is not less than the diameter of the lowest stage of the three-stage stepped structure. A fixing thread 101 is formed on the inner wall of the single-stage stepped structure, matching the outer thread on the top of the wellhead shut-off valve. During use, the fixing thread 101 facilitates the disassembly and installation of the support 100 on the wellhead shut-off valve. The inner wall of the three-stage stepped structure has an internal thread, which engages with the external thread on the outer surface of the lead screw 200. Based on embodiment 5, in this embodiment, the bottom of the lead screw 200 is connected to the bearing seat 600, and the top rod 500 is vertically arranged at the center of the bearing seat 600.

[0040] This embodiment represents only a preferred implementation of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model. Any manual auxiliary opening device for the gas field wellhead safety shut-off valve designed with similar technical features to this utility model will fall within the protection scope of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model.

[0041] Example 7 This utility model relates to a manual auxiliary opening device for a gas field wellhead safety shut-off valve, comprising a support 100, which is a hollow cylinder. The shut-off valve is axially connected to the lower part of the support 100. A lead screw 200 is sleeved inside the support 100, with its top extending through the support 100. A handwheel 300 is connected to the top axis of the lead screw 200. The upper part of the support 100 has a three-stage stepped structure, with the diameter increasing progressively from top to bottom. The bottom of the support 100 has a single-stage stepped structure, the diameter of which is not less than the diameter of the lowest stage of the three-stage stepped structure. A fixing thread 101 is formed on the inner wall of the single-stage stepped structure, matching the outer thread on the top of the wellhead shut-off valve. During use, the fixing thread 101 facilitates the disassembly and installation of the support 100 on the wellhead shut-off valve. The inner wall of the three-stage stepped structure has an internal thread, which engages with the external thread on the outer surface of the lead screw 200. The bottom of the lead screw 200 is connected to the bearing housing 600, and the top rod 500 is vertically installed at the center of the bearing housing 600. Based on embodiment 6, in this embodiment, the diameter of the bearing housing 600 matches the diameter of the bottom layer of the three-step structure, and the bearing housing 600 can move towards the bottom of the support 100 along with the lead screw 200.

[0042] This embodiment represents only a preferred implementation of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model. Any manual auxiliary opening device for the gas field wellhead safety shut-off valve designed with similar technical features to this utility model will fall within the protection scope of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model.

[0043] Example 8 This utility model relates to a manual auxiliary opening device for a gas field wellhead safety shut-off valve, comprising a support 100, which is a hollow cylinder. The shut-off valve is axially connected to the lower part of the support 100. A lead screw 200 is sleeved inside the support 100, with its top extending through the support 100. A handwheel 300 is connected to the top axis of the lead screw 200. The upper part of the support 100 has a three-stage stepped structure, with the diameter increasing progressively from top to bottom. The bottom of the support 100 has a single-stage stepped structure, the diameter of which is not less than the diameter of the lowest stage of the three-stage stepped structure. A fixing thread 101 is formed on the inner wall of the single-stage stepped structure, matching the outer thread on the top of the wellhead shut-off valve. During use, the fixing thread 101 facilitates the disassembly and installation of the support 100 on the wellhead shut-off valve. The inner wall of the three-stage stepped structure has an internal thread, which engages with the external thread on the outer surface of the lead screw 200. The bottom of the lead screw 200 is connected to the bearing housing 600, and a top rod 500 is vertically installed at the center of the bearing housing 600. The diameter of the bearing housing 600 matches the diameter of the lowest level of the three-stage stepped structure, and the bearing housing 600 can move towards the bottom of the support 100 along with the lead screw 200. Based on embodiment 7, in this embodiment, several through holes are evenly opened circumferentially on the outer wall of the first-stage stepped structure, and limiting screws are sleeved in the through holes to further fix the support 100 to the top of the shut-off valve. The fixing thread 101 at the bottom of the support 100 is screwed into the outer thread of the top of the wellhead shut-off valve to prevent the support 100 from rotating when the lead screw 200 rotates.

[0044] This embodiment represents only a preferred implementation of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model. Any manual auxiliary opening device for the gas field wellhead safety shut-off valve designed with similar technical features to this utility model will fall within the protection scope of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model.

[0045] Example 9 This utility model relates to a manual auxiliary opening device for a gas field wellhead safety shut-off valve, comprising a support 100, which is a hollow cylinder. The shut-off valve is axially connected to the lower part of the support 100. A lead screw 200 is sleeved inside the support 100, with its top extending through the support 100. A handwheel 300 is connected to the top axis of the lead screw 200. The upper part of the support 100 has a three-stage stepped structure, with the diameter increasing progressively from top to bottom. The bottom of the support 100 has a single-stage stepped structure, the diameter of which is not less than the diameter of the lowest stage of the three-stage stepped structure. A fixing thread 101 is formed on the inner wall of the single-stage stepped structure, matching the outer thread on the top of the wellhead shut-off valve. During use, the fixing thread 101 facilitates the disassembly and installation of the support 100 on the wellhead shut-off valve. The inner wall of the three-stage stepped structure has an internal thread, which engages with the external thread on the outer surface of the lead screw 200. The bottom of the lead screw 200 is connected to the bearing housing 600, and a top rod 500 is vertically installed at the center of the bearing housing 600. The diameter of the bearing housing 600 matches the diameter of the lowest layer of the three-stage stepped structure, and the bearing housing 600 can move towards the bottom of the support 100 along with the lead screw 200. Several through holes are evenly opened circumferentially on the outer wall of the first-stage stepped structure, and limiting screws are sleeved in the through holes to further fix the support 100 to the top of the shut-off valve. The fixing thread 101 at the bottom of the support 100 is screwed into the outer thread of the top of the wellhead shut-off valve to prevent the support 100 from rotating when the lead screw 200 rotates. Based on embodiment 8, in this embodiment, the handwheel 300 includes an outer ring and an inner disc, as well as several support rods connecting the outer ring and the inner disc, and the several support rods are evenly distributed circumferentially between the outer ring and the inner disc.

[0046] This embodiment represents only a preferred implementation of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model. Any manual auxiliary opening device for the gas field wellhead safety shut-off valve designed with similar technical features to this utility model will fall within the protection scope of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model.

[0047] Example 10 This utility model relates to a manual auxiliary opening device for a gas field wellhead safety shut-off valve, comprising a support 100, which is a hollow cylinder. The shut-off valve is axially connected to the lower part of the support 100. A lead screw 200 is sleeved inside the support 100, with its top extending through the support 100. A handwheel 300 is connected to the top axis of the lead screw 200. The upper part of the support 100 has a three-stage stepped structure, with the diameter increasing progressively from top to bottom. The bottom of the support 100 has a single-stage stepped structure, the diameter of which is not less than the diameter of the lowest stage of the three-stage stepped structure. A fixing thread 101 is formed on the inner wall of the single-stage stepped structure, matching the outer thread on the top of the wellhead shut-off valve. During use, the fixing thread 101 facilitates the disassembly and installation of the support 100 on the wellhead shut-off valve. The inner wall of the three-stage stepped structure has an internal thread, which engages with the external thread on the outer surface of the lead screw 200. The bottom of the lead screw 200 is connected to the bearing seat 600, and a top rod 500 is vertically installed at the center of the bearing seat 600. The diameter of the bearing seat 600 matches the diameter of the lowest level of the three-stage stepped structure, and the bearing seat 600 can move towards the bottom of the support 100 along with the lead screw 200. Several through holes are evenly opened circumferentially on the outer wall of the first-stage stepped structure, and limiting screws are sleeved in the through holes to further fix the support 100 to the top of the shut-off valve. The fixing thread 101 at the bottom of the support 100 is screwed into the outer thread of the top of the wellhead shut-off valve to prevent the support 100 from rotating when the lead screw 200 rotates. The handwheel 300 includes an outer ring and an inner disc, as well as several support rods connecting the outer ring and the inner disc. The support rods are evenly distributed circumferentially between the outer ring and the inner disc. Based on embodiment 9, the included angles between the support rods in this embodiment are the same.

[0048] This embodiment represents only a preferred implementation of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model. Any manual auxiliary opening device for the gas field wellhead safety shut-off valve designed with similar technical features to this utility model will fall within the protection scope of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model.

[0049] Example 11 This utility model relates to a manual auxiliary opening device for a gas field wellhead safety shut-off valve, comprising a support 100, which is a hollow cylinder. The shut-off valve is axially connected to the lower part of the support 100. A lead screw 200 is sleeved inside the support 100, with its top extending through the support 100. A handwheel 300 is connected to the top axis of the lead screw 200. The upper part of the support 100 has a three-stage stepped structure, with the diameter increasing progressively from top to bottom. The bottom of the support 100 has a single-stage stepped structure, the diameter of which is not less than the diameter of the lowest stage of the three-stage stepped structure. A fixing thread 101 is formed on the inner wall of the single-stage stepped structure, matching the outer thread on the top of the wellhead shut-off valve. During use, the fixing thread 101 facilitates the disassembly and installation of the support 100 on the wellhead shut-off valve. The inner wall of the three-stage stepped structure has an internal thread, which engages with the external thread on the outer surface of the lead screw 200. The bottom of the lead screw 200 is connected to the bearing housing 600, and a top rod 500 is vertically installed at the center of the bearing housing 600. The diameter of the bearing housing 600 matches the diameter of the lowest layer of the three-stage stepped structure, and the bearing housing 600 can move towards the bottom of the support 100 along with the lead screw 200. Several through holes are evenly opened circumferentially on the outer wall of the first-stage stepped structure, and limiting screws are fitted into the through holes to further fix the support 100 to the top of the shut-off valve. The fixing thread 101 at the bottom of the support 100 is screwed into the outer thread of the top of the wellhead shut-off valve to prevent the support 100 from rotating when the lead screw 200 rotates. The handwheel 300 includes an outer ring and an inner disc, as well as several support rods connecting the outer ring and the inner disc. The support rods are evenly distributed circumferentially between the outer ring and the inner disc, and the included angles between the support rods are the same. Based on Example 10, this example has three support rods: an outer ring and an inner disc, and several support rods connecting the outer ring and the inner disc are integrally welded together.

[0050] This embodiment represents only a preferred implementation of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model. Any manual auxiliary opening device for the gas field wellhead safety shut-off valve designed with similar technical features to this utility model will fall within the protection scope of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model.

[0051] Example 12 This utility model relates to a manual auxiliary opening device for a gas field wellhead safety shut-off valve, comprising a support 100, which is a hollow cylinder. The shut-off valve is axially connected to the lower part of the support 100. A lead screw 200 is sleeved inside the support 100, with its top extending through the support 100. A handwheel 300 is connected to the top axis of the lead screw 200. The upper part of the support 100 has a three-stage stepped structure, with the diameter increasing progressively from top to bottom. The bottom of the support 100 has a single-stage stepped structure, the diameter of which is not less than the diameter of the lowest stage of the three-stage stepped structure. A fixing thread 101 is formed on the inner wall of the single-stage stepped structure, matching the outer thread on the top of the wellhead shut-off valve. During use, the fixing thread 101 facilitates the disassembly and installation of the support 100 on the wellhead shut-off valve. The inner wall of the three-stage stepped structure has an internal thread, which engages with the external thread on the outer surface of the lead screw 200. The bottom of the lead screw 200 is connected to the bearing housing 600, and a top rod 500 is vertically installed at the center of the bearing housing 600. The diameter of the bearing housing 600 matches the diameter of the lowest level of the three-stage stepped structure, and the bearing housing 600 can move towards the bottom of the support 100 along with the lead screw 200. Several through holes are evenly opened circumferentially on the outer wall of the first-stage stepped structure, and limiting screws are fitted into the through holes to further fix the support 100 to the top of the shut-off valve. The fixing thread 101 at the bottom of the support 100 is screwed into the outer thread of the top of the wellhead shut-off valve to prevent the support 100 from rotating when the lead screw 200 rotates. The handwheel 300 includes an outer ring and an inner disc, as well as several support rods connecting the outer ring and the inner disc. The support rods are evenly distributed circumferentially between the outer ring and the inner disc, and the included angles between the support rods are the same. There are three support rods, and the outer ring and the inner disc, as well as several support rods connecting the outer ring and the inner disc, are integrally welded together. Based on embodiment 11, in this embodiment, a connecting hole is opened at the top axis of the lead screw 200, and a fixing hole is opened at the center of the inner disc. A fixing nut 400 is sleeved in the connecting hole and the fixing hole. The handwheel 300 is fixed to the outer side of the top of the lead screw 200 by the fixing nut 400. The use of the fixing nut 400 facilitates the disassembly and installation of the handwheel 300 on the top of the lead screw 200.

[0052] This embodiment represents only a preferred implementation of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model. Any manual auxiliary opening device for the gas field wellhead safety shut-off valve designed with similar technical features to this utility model will fall within the protection scope of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model.

[0053] Example 13 This utility model relates to a manual auxiliary opening device for a gas field wellhead safety shut-off valve, comprising a support 100, which is a hollow cylinder. The shut-off valve is axially connected to the lower part of the support 100. A lead screw 200 is sleeved inside the support 100, with its top extending through the support 100. A handwheel 300 is connected to the top axis of the lead screw 200. The upper part of the support 100 has a three-stage stepped structure, with the diameter increasing progressively from top to bottom. The bottom of the support 100 has a single-stage stepped structure, the diameter of which is not less than the diameter of the lowest stage of the three-stage stepped structure. A fixing thread 101 is formed on the inner wall of the single-stage stepped structure, matching the outer thread on the top of the wellhead shut-off valve. During use, the fixing thread 101 facilitates the disassembly and installation of the support 100 on the wellhead shut-off valve. The inner wall of the three-stage stepped structure has an internal thread, which engages with the external thread on the outer surface of the lead screw 200. The bottom of the lead screw 200 is connected to the bearing housing 600, and a top rod 500 is vertically installed at the center of the bearing housing 600. The diameter of the bearing housing 600 matches the diameter of the lowest level of the three-stage stepped structure, and the bearing housing 600 can move towards the bottom of the support 100 along with the lead screw 200. Several through holes are evenly opened circumferentially on the outer wall of the first-stage stepped structure, and limiting screws are fitted into the through holes to further fix the support 100 to the top of the shut-off valve. The fixing thread 101 at the bottom of the support 100 is screwed into the outer thread of the top of the wellhead shut-off valve to prevent the support 100 from rotating when the lead screw 200 rotates. The handwheel 300 includes an outer ring and an inner disc, as well as several support rods connecting the outer ring and the inner disc. The support rods are evenly distributed circumferentially between the outer ring and the inner disc, and the included angles between the support rods are the same. There are three support rods, and the outer ring and the inner disc, as well as several support rods connecting the outer ring and the inner disc, are integrally welded together. A connecting hole is formed at the top center of the lead screw 200, and a corresponding fixing hole is formed at the center of the inner disc. A fixing nut 400 is fitted into both the connecting hole and the fixing hole. The handwheel 300 is fixed to the outer side of the top of the lead screw 200 by the fixing nut 400. The use of the fixing nut 400 facilitates the removal and installation of the handwheel 300 on the top of the lead screw 200. Based on embodiment 12, in this embodiment, several weight-reducing grooves 102 are formed through the middle of the outer wall of the support 100.

[0054] This embodiment represents only a preferred implementation of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model. Any manual auxiliary opening device for the gas field wellhead safety shut-off valve designed with similar technical features to this utility model will fall within the protection scope of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model.

[0055] Example 14 This utility model relates to a manual auxiliary opening device for a gas field wellhead safety shut-off valve, comprising a support 100, which is a hollow cylinder. The shut-off valve is axially connected to the lower part of the support 100. A lead screw 200 is sleeved inside the support 100, with its top extending through the support 100. A handwheel 300 is connected to the top axis of the lead screw 200. The upper part of the support 100 has a three-stage stepped structure, with the diameter increasing progressively from top to bottom. The bottom of the support 100 has a single-stage stepped structure, the diameter of which is not less than the diameter of the lowest stage of the three-stage stepped structure. A fixing thread 101 is formed on the inner wall of the single-stage stepped structure, matching the outer thread on the top of the wellhead shut-off valve. During use, the fixing thread 101 facilitates the disassembly and installation of the support 100 on the wellhead shut-off valve. The inner wall of the three-stage stepped structure has an internal thread, which engages with the external thread on the outer surface of the lead screw 200. The bottom of the lead screw 200 is connected to the bearing housing 600, and a top rod 500 is vertically installed at the center of the bearing housing 600. The diameter of the bearing housing 600 matches the diameter of the lowest level of the three-stage stepped structure, and the bearing housing 600 can move towards the bottom of the support 100 along with the lead screw 200. Several through holes are evenly opened circumferentially on the outer wall of the first-stage stepped structure, and limiting screws are fitted into the through holes to further fix the support 100 to the top of the shut-off valve. The fixing thread 101 at the bottom of the support 100 is screwed into the outer thread of the top of the wellhead shut-off valve to prevent the support 100 from rotating when the lead screw 200 rotates. The handwheel 300 includes an outer ring and an inner disc, as well as several support rods connecting the outer ring and the inner disc. The support rods are evenly distributed circumferentially between the outer ring and the inner disc, and the included angles between the support rods are the same. There are three support rods, and the outer ring and the inner disc, as well as several support rods connecting the outer ring and the inner disc, are integrally welded together. A connecting hole is opened at the top center of the lead screw 200, and a corresponding fixing hole is opened at the center of the inner disc. A fixing nut 400 is fitted into the connecting hole and the fixing hole. The handwheel 300 is fixed to the outer side of the top of the lead screw 200 by the fixing nut 400. The use of the fixing nut 400 facilitates the disassembly and installation of the handwheel 300 on the top of the lead screw 200. Several weight-reducing grooves 102 are opened through the middle of the outer wall of the support 100. Based on embodiment 13, the weight-reducing grooves 102 in this embodiment are evenly distributed in the middle of the outer wall of the support 100. The use of the weight-reducing grooves 102 reduces the weight of the support 100 itself, making it easier to carry.

[0056] This embodiment represents only a preferred implementation of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model. Any manual auxiliary opening device for the gas field wellhead safety shut-off valve designed with similar technical features to this utility model will fall within the protection scope of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model.

[0057] Example 15 This utility model relates to a manual auxiliary opening device for a gas field wellhead safety shut-off valve, comprising a support 100, which is a hollow cylinder. The shut-off valve is axially connected to the lower part of the support 100. A lead screw 200 is sleeved inside the support 100, with its top extending through the support 100. A handwheel 300 is connected to the top axis of the lead screw 200. The upper part of the support 100 has a three-stage stepped structure, with the diameter increasing progressively from top to bottom. The bottom of the support 100 has a single-stage stepped structure, the diameter of which is not less than the diameter of the lowest stage of the three-stage stepped structure. A fixing thread 101 is formed on the inner wall of the single-stage stepped structure, matching the outer thread on the top of the wellhead shut-off valve. During use, the fixing thread 101 facilitates the disassembly and installation of the support 100 on the wellhead shut-off valve. The inner wall of the three-stage stepped structure has an internal thread, which engages with the external thread on the outer surface of the lead screw 200. The bottom of the lead screw 200 is connected to the bearing housing 600, and a top rod 500 is vertically installed at the center of the bearing housing 600. The diameter of the bearing housing 600 matches the diameter of the lowest level of the three-stage stepped structure, and the bearing housing 600 can move towards the bottom of the support 100 along with the lead screw 200. Several through holes are evenly opened circumferentially on the outer wall of the first-stage stepped structure, and limiting screws are fitted into the through holes to further fix the support 100 to the top of the shut-off valve. The fixing thread 101 at the bottom of the support 100 is screwed into the outer thread of the top of the wellhead shut-off valve to prevent the support 100 from rotating when the lead screw 200 rotates. The handwheel 300 includes an outer ring and an inner disc, as well as several support rods connecting the outer ring and the inner disc. The support rods are evenly distributed circumferentially between the outer ring and the inner disc, and the included angles between the support rods are the same. There are three support rods, and the outer ring and the inner disc, as well as several support rods connecting the outer ring and the inner disc, are integrally welded together. A connecting hole is opened at the top center of the lead screw 200, and a corresponding fixing hole is opened at the center of the inner disc. A fixing nut 400 is fitted into both the connecting hole and the fixing hole. The handwheel 300 is fixed to the outer side of the top of the lead screw 200 by the fixing nut 400. The fixing nut 400 facilitates the removal and installation of the handwheel 300 on the top of the lead screw 200. Several weight-reducing grooves 102 are evenly distributed in the middle of the outer wall of the support 100. The weight-reducing grooves 102 reduce the weight of the support 100 itself, making it easier to carry. Based on embodiment 14, the number of weight-reducing grooves 102 can be arbitrarily selected to ensure normal use. In this embodiment, four weight-reducing grooves 102 are used.

[0058] This embodiment represents only a preferred implementation of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model. Any manual auxiliary opening device for the gas field wellhead safety shut-off valve designed with similar technical features to this utility model will fall within the protection scope of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model.

[0059] Example 16 This utility model relates to a manual auxiliary opening device for a gas field wellhead safety shut-off valve, comprising a support 100, which is a hollow cylinder. The shut-off valve is axially connected to the lower part of the support 100. A lead screw 200 is sleeved inside the support 100, with its top extending through the support 100. A handwheel 300 is connected to the top axis of the lead screw 200. The upper part of the support 100 has a three-stage stepped structure, with the diameter increasing progressively from top to bottom. The bottom of the support 100 has a single-stage stepped structure, the diameter of which is not less than the diameter of the lowest stage of the three-stage stepped structure. A fixing thread 101 is formed on the inner wall of the single-stage stepped structure, matching the outer thread on the top of the wellhead shut-off valve. During use, the fixing thread 101 facilitates the disassembly and installation of the support 100 on the wellhead shut-off valve. The inner wall of the three-stage stepped structure has an internal thread, which engages with the external thread on the outer surface of the lead screw 200. The bottom of the lead screw 200 is connected to the bearing housing 600, and a top rod 500 is vertically installed at the center of the bearing housing 600. The diameter of the bearing housing 600 matches the diameter of the lowest level of the three-stage stepped structure, and the bearing housing 600 can move towards the bottom of the support 100 along with the lead screw 200. Several through holes are evenly opened circumferentially on the outer wall of the first-stage stepped structure, and limiting screws are fitted into the through holes to further fix the support 100 to the top of the shut-off valve. The fixing thread 101 at the bottom of the support 100 is screwed into the outer thread of the top of the wellhead shut-off valve to prevent the support 100 from rotating when the lead screw 200 rotates. The handwheel 300 includes an outer ring and an inner disc, as well as several support rods connecting the outer ring and the inner disc. The support rods are evenly distributed circumferentially between the outer ring and the inner disc, and the included angles between the support rods are the same. There are three support rods, and the outer ring and the inner disc, as well as several support rods connecting the outer ring and the inner disc, are integrally welded together. A connecting hole is opened at the top center of the lead screw 200, and a corresponding fixing hole is opened at the center of the inner disc. A fixing nut 400 is fitted into the connecting hole and the fixing hole. The handwheel 300 is fixed to the outer side of the top of the lead screw 200 by the fixing nut 400. The fixing nut 400 facilitates the removal and installation of the handwheel 300 on the top of the lead screw 200. Several weight-reducing grooves 102 are evenly distributed in the middle of the outer wall of the support 100. The weight-reducing grooves 102 reduce the weight of the support 100 itself, making it easier to carry. The number of weight-reducing grooves 102 can be arbitrarily selected to ensure normal use; in this embodiment, four weight-reducing grooves 102 are used. Based on embodiment 14, the outer ring of the handwheel 300 in this embodiment is fitted with an anti-slip sleeve. The outer ring of the handwheel 300 is held and rotated by the worker. The anti-slip sleeve prevents slippage when rotating the handwheel 300, thus preventing interference with normal use.

[0060] This embodiment represents only a preferred implementation of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model. Any manual auxiliary opening device for the gas field wellhead safety shut-off valve designed with similar technical features to this utility model will fall within the protection scope of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model.

[0061] Example 17 This utility model relates to a manual auxiliary opening device for a gas field wellhead safety shut-off valve, comprising a support 100, which is a hollow cylinder. The shut-off valve is axially connected to the lower part of the support 100. A lead screw 200 is sleeved inside the support 100, with its top extending through the support 100. A handwheel 300 is axially connected to the top of the lead screw 200. The upper part of the support 100 has a three-stage stepped structure, with the diameter increasing progressively from top to bottom. The bottom of the support 100 has a single-stage stepped structure, the diameter of which is not less than the diameter of the lowest stage of the three-stage stepped structure. A fixing thread 101 is formed on the inner wall of the single-stage stepped structure, matching the outer thread on the top of the wellhead shut-off valve. During use, the fixing thread 101 facilitates the disassembly and installation of the support 100 on the wellhead shut-off valve. The inner wall of the three-stage stepped structure has an internal thread, which engages with the external thread on the outer surface of the lead screw 200. The bottom of the lead screw 200 is connected to the bearing housing 600, and a top rod 500 is vertically installed at the center of the bearing housing 600. The diameter of the bearing housing 600 matches the diameter of the lowest level of the three-stage stepped structure, and the bearing housing 600 can move towards the bottom of the support 100 along with the lead screw 200. Several through holes are evenly opened circumferentially on the outer wall of the first-stage stepped structure, and limiting screws are fitted into the through holes to further fix the support 100 to the top of the shut-off valve. The fixing thread 101 at the bottom of the support 100 is screwed into the outer thread of the top of the wellhead shut-off valve to prevent the support 100 from rotating when the lead screw 200 rotates. The handwheel 300 includes an outer ring and an inner disc, as well as several support rods connecting the outer ring and the inner disc. The support rods are evenly distributed circumferentially between the outer ring and the inner disc, and the included angles between the support rods are the same. There are three support rods, and the outer ring and the inner disc, as well as several support rods connecting the outer ring and the inner disc, are integrally welded together. A connecting hole is opened at the top center of the lead screw 200, and a corresponding fixing hole is opened at the center of the inner disc. A fixing nut 400 is fitted into both the connecting hole and the fixing hole. The handwheel 300 is fixed to the outer side of the top of the lead screw 200 by the fixing nut 400. The fixing nut 400 facilitates the removal and installation of the handwheel 300 on the top of the lead screw 200. Several weight-reducing grooves 102 are evenly distributed in the middle of the outer wall of the support 100. The weight-reducing grooves 102 reduce the weight of the support 100 itself, making it easier to carry. The number of weight-reducing grooves 102 can be arbitrarily selected to ensure normal use; in this embodiment, four weight-reducing grooves 102 are used. An anti-slip sleeve is fitted onto the outer ring of the handwheel 300. The outer ring of the handwheel 300 is gripped and rotated by the worker. The anti-slip sleeve prevents slippage when rotating the handwheel 300, thus preventing interference with normal use. A washer is threaded onto the outer side of the top of the wellhead shut-off valve. During use, the washer protects the top of the wellhead shut-off valve from wear and extends its service life.

[0062] This embodiment represents only a preferred implementation of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model. Any manual auxiliary opening device for the gas field wellhead safety shut-off valve designed with similar technical features to this utility model will fall within the protection scope of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model.

[0063] Example 18 This utility model relates to a manual auxiliary opening device for a gas field wellhead safety shut-off valve, comprising a support 100, which is a hollow cylinder. The shut-off valve is axially connected to the lower part of the support 100. A lead screw 200 is sleeved inside the support 100, with its top extending through the support 100. A handwheel 300 is connected to the top axis of the lead screw 200. The upper part of the support 100 has a three-stage stepped structure, with the diameter increasing progressively from top to bottom. The bottom of the support 100 has a single-stage stepped structure, the diameter of which is not less than the diameter of the lowest stage of the three-stage stepped structure. A fixing thread 101 is formed on the inner wall of the single-stage stepped structure, matching the outer thread on the top of the wellhead shut-off valve. During use, the fixing thread 101 facilitates the disassembly and installation of the support 100 on the wellhead shut-off valve. The inner wall of the three-stage stepped structure has an internal thread, which engages with the external thread on the outer surface of the lead screw 200. The bottom of the lead screw 200 is connected to the bearing housing 600, and a top rod 500 is vertically installed at the center of the bearing housing 600. The diameter of the bearing housing 600 matches the diameter of the lowest level of the three-stage stepped structure, and the bearing housing 600 can move towards the bottom of the support 100 along with the lead screw 200. Several through holes are evenly opened circumferentially on the outer wall of the first-stage stepped structure, and limiting screws are fitted into the through holes to further fix the support 100 to the top of the shut-off valve. The fixing thread 101 at the bottom of the support 100 is screwed into the outer thread of the top of the wellhead shut-off valve to prevent the support 100 from rotating when the lead screw 200 rotates. The handwheel 300 includes an outer ring and an inner disc, as well as several support rods connecting the outer ring and the inner disc. The support rods are evenly distributed circumferentially between the outer ring and the inner disc, and the included angles between the support rods are the same. There are three support rods, and the outer ring and the inner disc, as well as several support rods connecting the outer ring and the inner disc, are integrally welded together. A connecting hole is opened at the top center of the lead screw 200, and a corresponding fixing hole is opened at the center of the inner disc. A fixing nut 400 is fitted into the connecting hole and the fixing hole. The handwheel 300 is fixed to the outer side of the top of the lead screw 200 by the fixing nut 400. The use of the fixing nut 400 facilitates the disassembly and installation of the handwheel 300 on the top of the lead screw 200. Several weight-reducing grooves 102 are evenly distributed in the middle of the outer wall of the support 100. The use of the weight-reducing grooves 102 reduces the weight of the support 100 itself, making it easier to carry. The number of weight-reducing grooves 102 can be arbitrarily selected to ensure normal use. In this embodiment, four weight-reducing grooves 102 are used. The outer ring of the handwheel 300 is fitted with an anti-slip sleeve. The bottom of the lead screw 200 is integrally connected to the bearing seat 600. A top rod 500 is vertically set in the center of the bearing seat 600. The bottom of the top rod 500 is wrapped with a buffer pad to reduce impact damage to the shut-off valve.

[0064] This embodiment represents only a preferred implementation of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model. Any manual auxiliary opening device for the gas field wellhead safety shut-off valve designed with similar technical features to this utility model will fall within the protection scope of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model.

[0065] Example 19 This utility model relates to a manual auxiliary opening device for a gas field wellhead safety shut-off valve, comprising a support 100, which is a hollow cylinder. The shut-off valve is axially connected to the lower part of the support 100. A lead screw 200 is sleeved inside the support 100, with its top extending through the support 100. A handwheel 300 is connected to the top axis of the lead screw 200. The upper part of the support 100 has a three-stage stepped structure, with the diameter increasing progressively from top to bottom. The bottom of the support 100 has a single-stage stepped structure, the diameter of which is not less than the diameter of the lowest stage of the three-stage stepped structure. A fixing thread 101 is formed on the inner wall of the single-stage stepped structure, matching the outer thread on the top of the wellhead shut-off valve. During use, the fixing thread 101 facilitates the disassembly and installation of the support 100 on the wellhead shut-off valve. The inner wall of the three-stage stepped structure has an internal thread, which engages with the external thread on the outer surface of the lead screw 200. The bottom of the lead screw 200 is connected to the bearing housing 600, and a top rod 500 is vertically installed at the center of the bearing housing 600. The diameter of the bearing housing 600 matches the diameter of the lowest level of the three-stage stepped structure, and the bearing housing 600 can move towards the bottom of the support 100 along with the lead screw 200. Several through holes are evenly opened circumferentially on the outer wall of the first-stage stepped structure, and limiting screws are fitted into the through holes to further fix the support 100 to the top of the shut-off valve. The fixing thread 101 at the bottom of the support 100 is screwed into the outer thread of the top of the wellhead shut-off valve to prevent the support 100 from rotating when the lead screw 200 rotates. The handwheel 300 includes an outer ring and an inner disc, as well as several support rods connecting the outer ring and the inner disc. The support rods are evenly distributed circumferentially between the outer ring and the inner disc, and the included angles between the support rods are the same. There are three support rods, and the outer ring and the inner disc, as well as several support rods connecting the outer ring and the inner disc, are integrally welded together. A connecting hole is opened at the top center of the lead screw 200, and a corresponding fixing hole is opened at the center of the inner disc. A fixing nut 400 is fitted into both the connecting hole and the fixing hole. The handwheel 300 is fixed to the outer side of the top of the lead screw 200 by the fixing nut 400. The fixing nut 400 facilitates the removal and installation of the handwheel 300 on the top of the lead screw 200. Several weight-reducing grooves 102 are evenly distributed throughout the middle of the outer wall of the support 100. These grooves reduce the weight of the support 100, making it easier to carry. The number of weight-reducing grooves 102 can be arbitrarily selected to ensure normal use; in this embodiment, four weight-reducing grooves 102 are used. The outer ring of the handwheel 300 is fitted with an anti-slip sleeve; a dust screen is installed at the bottom of the support 100, which covers the bottom of the support 100 and the weight reduction groove 102. The dust screen prevents large impurities from entering the inside of the gas field wellhead safety shut-off valve manual auxiliary opening device when it is not in use.

[0066] This embodiment represents only a preferred implementation of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model. Any manual auxiliary opening device for the gas field wellhead safety shut-off valve designed with similar technical features to this utility model will fall within the protection scope of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model.

[0067] Example 20 This utility model relates to a manual auxiliary opening device for a gas field wellhead safety shut-off valve, comprising a support 100, which is a hollow cylinder. The shut-off valve is axially connected to the lower part of the support 100. A lead screw 200 is sleeved inside the support 100, with its top extending through the support 100. A handwheel 300 is connected to the top axis of the lead screw 200. The upper part of the support 100 has a three-stage stepped structure, with the diameter increasing progressively from top to bottom. The bottom of the support 100 has a single-stage stepped structure, the diameter of which is not less than the diameter of the lowest stage of the three-stage stepped structure. A fixing thread 101 is formed on the inner wall of the single-stage stepped structure, matching the outer thread on the top of the wellhead shut-off valve. During use, the fixing thread 101 facilitates the disassembly and installation of the support 100 on the wellhead shut-off valve. The inner wall of the three-stage stepped structure has an internal thread, which engages with the external thread on the outer surface of the lead screw 200. The bottom of the lead screw 200 is connected to the bearing housing 600, and a top rod 500 is vertically installed at the center of the bearing housing 600. The diameter of the bearing housing 600 matches the diameter of the lowest level of the three-stage stepped structure, and the bearing housing 600 can move towards the bottom of the support 100 along with the lead screw 200. Several through holes are evenly opened circumferentially on the outer wall of the first-stage stepped structure, and limiting screws are fitted into the through holes to further fix the support 100 to the top of the shut-off valve. The fixing thread 101 at the bottom of the support 100 is screwed into the outer thread of the top of the wellhead shut-off valve to prevent the support 100 from rotating when the lead screw 200 rotates. The handwheel 300 includes an outer ring and an inner disc, as well as several support rods connecting the outer ring and the inner disc. The support rods are evenly distributed circumferentially between the outer ring and the inner disc, and the included angles between the support rods are the same. There are three support rods, and the outer ring and the inner disc, as well as several support rods connecting the outer ring and the inner disc, are integrally welded together. A connecting hole is opened at the top center of the lead screw 200, and a corresponding fixing hole is opened at the center of the inner disc. A fixing nut 400 is fitted into the connecting hole and the fixing hole. The handwheel 300 is fixed to the outer side of the top of the lead screw 200 by the fixing nut 400. The use of the fixing nut 400 facilitates the removal and installation of the handwheel 300 on the top of the lead screw 200. Several weight-reducing grooves 102 are evenly distributed in the middle of the outer wall of the support 100. The use of the weight-reducing grooves 102 reduces the weight of the support 100 itself, making it easier to carry. The number of weight-reducing grooves 102 can be arbitrarily selected to ensure normal use. In this embodiment, four weight-reducing grooves 102 are used. The outer ring of the handwheel 300 is fitted with an anti-slip sleeve. A washer is threaded on the outer side of the top of the wellhead shut-off valve. The bottom of the top rod 500 is wrapped with a buffer pad. A dust screen is set at the bottom of the support 100. The dust screen covers the bottom of the support 100 and the weight-reducing grooves 102. The washer is made of rubber.

[0068] This embodiment represents only a preferred implementation of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model. Any manual auxiliary opening device for the gas field wellhead safety shut-off valve designed with similar technical features to this utility model will fall within the protection scope of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model.

[0069] Example 21 This utility model relates to a manual auxiliary opening device for a gas field wellhead safety shut-off valve, comprising a support 100, which is a hollow cylinder. The shut-off valve is axially connected to the lower part of the support 100. A lead screw 200 is sleeved inside the support 100, with its top extending through the support 100. A handwheel 300 is connected to the top axis of the lead screw 200. The upper part of the support 100 has a three-stage stepped structure, with the diameter increasing progressively from top to bottom. The bottom of the support 100 has a single-stage stepped structure, the diameter of which is not less than the diameter of the lowest stage of the three-stage stepped structure. A fixing thread 101 is formed on the inner wall of the single-stage stepped structure, matching the outer thread on the top of the wellhead shut-off valve. During use, the fixing thread 101 facilitates the disassembly and installation of the support 100 on the wellhead shut-off valve. The inner wall of the three-stage stepped structure has an internal thread, which engages with the external thread on the outer surface of the lead screw 200. The bottom of the lead screw 200 is connected to the bearing housing 600, and a top rod 500 is vertically installed at the center of the bearing housing 600. The diameter of the bearing housing 600 matches the diameter of the lowest level of the three-stage stepped structure, and the bearing housing 600 can move towards the bottom of the support 100 along with the lead screw 200. Several through holes are evenly opened circumferentially on the outer wall of the first-stage stepped structure, and limiting screws are fitted into the through holes to further fix the support 100 to the top of the shut-off valve. The fixing thread 101 at the bottom of the support 100 is screwed into the outer thread of the top of the wellhead shut-off valve to prevent the support 100 from rotating when the lead screw 200 rotates. The handwheel 300 includes an outer ring and an inner disc, as well as several support rods connecting the outer ring and the inner disc. The support rods are evenly distributed circumferentially between the outer ring and the inner disc, and the included angles between the support rods are the same. There are three support rods, and the outer ring and the inner disc, as well as several support rods connecting the outer ring and the inner disc, are integrally welded together. A connecting hole is opened at the top center of the lead screw 200, and a corresponding fixing hole is opened at the center of the inner disc. A fixing nut 400 is fitted into the connecting hole and the fixing hole. The handwheel 300 is fixed to the outer side of the top of the lead screw 200 by the fixing nut 400. The use of the fixing nut 400 facilitates the removal and installation of the handwheel 300 on the top of the lead screw 200. Several weight-reducing grooves 102 are evenly distributed in the middle of the outer wall of the support 100. The use of the weight-reducing grooves 102 reduces the weight of the support 100 itself, making it easier to carry. The number of weight-reducing grooves 102 can be arbitrarily selected to ensure normal use. In this embodiment, four weight-reducing grooves 102 are used. The outer ring of the handwheel 300 is fitted with an anti-slip sleeve. A washer is threaded on the outer side of the top of the wellhead shut-off valve. The bottom of the top rod 500 is wrapped with a buffer pad. A dust screen is set at the bottom of the support 100. The dust screen covers the bottom of the support 100 and the weight-reducing grooves 102. The washer is made of rubber and the buffer pad is made of elastic material.

[0070] This embodiment represents only a preferred implementation of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model. Any manual auxiliary opening device for the gas field wellhead safety shut-off valve designed with similar technical features to this utility model will fall within the protection scope of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model.

[0071] Example 22 This utility model relates to a manual auxiliary opening device for a gas field wellhead safety shut-off valve, comprising a support 100, which is a hollow cylinder. The shut-off valve is axially connected to the lower part of the support 100. A lead screw 200 is sleeved inside the support 100, with its top extending through the support 100. A handwheel 300 is connected to the top axis of the lead screw 200. The upper part of the support 100 has a three-stage stepped structure, with the diameter increasing progressively from top to bottom. The bottom of the support 100 has a single-stage stepped structure, the diameter of which is not less than the diameter of the lowest stage of the three-stage stepped structure. A fixing thread 101 is formed on the inner wall of the single-stage stepped structure, matching the outer thread on the top of the wellhead shut-off valve. During use, the fixing thread 101 facilitates the disassembly and installation of the support 100 on the wellhead shut-off valve. The inner wall of the three-stage stepped structure has an internal thread, which engages with the external thread on the outer surface of the lead screw 200. The bottom of the lead screw 200 is connected to the bearing housing 600, and a top rod 500 is vertically installed at the center of the bearing housing 600. The diameter of the bearing housing 600 matches the diameter of the lowest level of the three-stage stepped structure, and the bearing housing 600 can move towards the bottom of the support 100 along with the lead screw 200. Several through holes are evenly opened circumferentially on the outer wall of the first-stage stepped structure, and limiting screws are fitted into the through holes to further fix the support 100 to the top of the shut-off valve. The fixing thread 101 at the bottom of the support 100 is screwed into the outer thread of the top of the wellhead shut-off valve to prevent the support 100 from rotating when the lead screw 200 rotates. The handwheel 300 includes an outer ring and an inner disc, as well as several support rods connecting the outer ring and the inner disc. The support rods are evenly distributed circumferentially between the outer ring and the inner disc, and the included angles between the support rods are the same. There are three support rods, and the outer ring and the inner disc, as well as several support rods connecting the outer ring and the inner disc, are integrally welded together. A connecting hole is opened at the top center of the lead screw 200, and a corresponding fixing hole is opened at the center of the inner disc. A fixing nut 400 is fitted into the connecting hole and the fixing hole. The handwheel 300 is fixed to the outer side of the top of the lead screw 200 by the fixing nut 400. The use of the fixing nut 400 facilitates the removal and installation of the handwheel 300 on the top of the lead screw 200. Several weight-reducing grooves 102 are evenly distributed in the middle of the outer wall of the support 100. The use of the weight-reducing grooves 102 reduces the weight of the support 100 itself, making it easier to carry. The number of weight-reducing grooves 102 can be arbitrarily selected to ensure normal use. In this embodiment, four weight-reducing grooves 102 are used. The outer ring of the handwheel 300 is fitted with an anti-slip sleeve. A washer is threaded on the outer side of the top of the wellhead shut-off valve. The bottom of the top rod 500 is wrapped with a buffer pad. A dust screen is set at the bottom of the support 100. The dust screen covers the bottom of the support 100 and the weight-reducing grooves 102. The washer is made of rubber, the buffer pad is made of elastic material, and the remaining connecting parts are made of stainless steel.

[0072] This embodiment represents only a preferred implementation of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model. Any manual auxiliary opening device for the gas field wellhead safety shut-off valve designed with similar technical features to this utility model will fall within the protection scope of the manual auxiliary opening device for the gas field wellhead safety shut-off valve of this utility model.

[0073] The working principle of this utility model's manual auxiliary opening device for a gas field wellhead safety shut-off valve is as follows: A screw 200 threaded into a support 100, a handwheel 300 fixed to the top of the screw 200, and a push rod 500 rotatably connected to the bottom of the screw via a bearing seat 600 are used to rotate the handwheel 300, causing the screw 200 to rise or fall, thereby manually opening or closing the valve. A fixed thread 101 matching the outer top of the wellhead shut-off valve is provided on the inner wall of the first-stage stepped structure at the bottom of the support 100. The screw 200 is threaded onto the inner wall of the third-stage stepped structure at the top of the support 100. The bearing seat 600 connects the outer upper part of the push rod 500 to the inner bottom of the screw 200, allowing the push rod 500 to rotate relative to the inner bottom of the screw 200, rather than rotating with it. This facilitates downward movement of the push rod 500, pushing the transmission rod downward without rotation, reliably forcibly opening the valve even without power.

[0074] The working process of this utility model's manual auxiliary opening device for a gas field wellhead safety shut-off valve is as follows: The device includes a support 100, which is a hollow cylinder. The shut-off valve is connected to the lower part of the support 100. A threaded rod 200 is sleeved inside the support 100, with its top extending through the support 100. A handwheel 300 is connected to the top axis of the threaded rod 200. The upper part of the support 100 has a three-stage stepped structure, with the diameter increasing progressively from top to bottom. The bottom of the support 100 has a single-stage stepped structure, the diameter of which is not less than the diameter of the lowest stage of the three-stage stepped structure. A fixing thread 101 is formed on the inner wall of the single-stage stepped structure, matching the outer thread on the top of the wellhead shut-off valve. During use, the fixing thread 101 facilitates the disassembly and installation of the support 100 on the wellhead shut-off valve. The inner wall of the three-stage stepped structure has an internal thread, which engages with the external thread on the outer surface of the threaded rod 200. The bottom of the lead screw 200 is connected to the bearing housing 600, and a top rod 500 is vertically installed at the center of the bearing housing 600. The diameter of the bearing housing 600 matches the diameter of the lowest level of the three-stage stepped structure, and the bearing housing 600 can move towards the bottom of the support 100 along with the lead screw 200. Several through holes are evenly opened circumferentially on the outer wall of the first-stage stepped structure, and limiting screws are fitted into the through holes to further fix the support 100 to the top of the shut-off valve. The fixing thread 101 at the bottom of the support 100 is screwed into the outer thread of the top of the wellhead shut-off valve to prevent the support 100 from rotating when the lead screw 200 rotates. The handwheel 300 includes an outer ring and an inner disc, as well as several support rods connecting the outer ring and the inner disc. The support rods are evenly distributed circumferentially between the outer ring and the inner disc, and the included angles between the support rods are the same. There are three support rods, and the outer ring and the inner disc, as well as several support rods connecting the outer ring and the inner disc, are integrally welded together. A connecting hole is opened at the top center of the lead screw 200, and a corresponding fixing hole is opened at the center of the inner disc. A fixing nut 400 is fitted into both the connecting hole and the fixing hole. The handwheel 300 is fixed to the outer side of the top of the lead screw 200 by the fixing nut 400. The fixing nut 400 facilitates the removal and installation of the handwheel 300 on the top of the lead screw 200. Several weight-reducing grooves 102 are evenly distributed throughout the middle of the outer wall of the support 100. These grooves reduce the weight of the support 100, making it easier to carry. The number of weight-reducing grooves 102 can be arbitrarily selected to ensure normal use; in this embodiment, four weight-reducing grooves 102 are used.The outer ring of handwheel 300 is fitted with an anti-slip sleeve. The outer ring of handwheel 300 is held and rotated by the worker. In use, the support 100 is first fixed to the outside of the top of the wellhead shut-off valve. When the worker manually rotates the outer ring of handwheel 300, rotating handwheel 300 in the forward direction drives screw 200 to rotate in the forward direction on support 100, thereby causing screw 200 to move downward on support 100. The downward movement of screw 200 causes push rod 500 to move downward. The downward movement of push rod 500 contacts the transmission rod inside the wellhead shut-off valve. The bottom end of push rod 500 presses the transmission rod downward, and the downward movement of transmission rod pushes the valve plate downward to open the gate valve. When it is necessary to close, rotate handwheel 300 in the reverse direction, so that the transmission rod is no longer restricted by push rod 500 and moves upward, thereby causing the valve plate to close the gate valve upward.

[0075] This utility model relates to a manual auxiliary opening device for a gas field wellhead safety shut-off valve. The device includes a support 100, which is a hollow cylinder. The shut-off valve is connected to the lower part of the support 100. A lead screw 200 is sleeved inside the support 100, with its top extending through the support 100. A handwheel 300 is connected to the top axis of the lead screw 200. The upper part of the support 100 has a three-stage stepped structure, with the diameter increasing progressively from top to bottom. The bottom of the support 100 has a single-stage stepped structure, the diameter of which is not less than the diameter of the lowest stage of the three-stage stepped structure. A fixing thread 101 is formed on the inner wall of the single-stage stepped structure, matching the outer thread on the top of the wellhead shut-off valve. During use, the fixing thread 101 facilitates the disassembly and installation of the support 100 on the wellhead shut-off valve. The inner wall of the three-stage stepped structure has an internal thread, which engages with the external thread on the outer surface of the lead screw 200. The bottom of the lead screw 200 is connected to the bearing housing 600, and a top rod 500 is vertically installed at the center of the bearing housing 600. The diameter of the bearing housing 600 matches the diameter of the lowest level of the three-stage stepped structure, and the bearing housing 600 can move towards the bottom of the support 100 along with the lead screw 200. Several through holes are evenly opened circumferentially on the outer wall of the first-stage stepped structure, and limiting screws are fitted into the through holes to further fix the support 100 to the top of the shut-off valve. The fixing thread 101 at the bottom of the support 100 is screwed into the outer thread of the top of the wellhead shut-off valve to prevent the support 100 from rotating when the lead screw 200 rotates. The handwheel 300 includes an outer ring and an inner disc, as well as several support rods connecting the outer ring and the inner disc. The support rods are evenly distributed circumferentially between the outer ring and the inner disc, and the included angles between the support rods are the same. There are three support rods, and the outer ring and the inner disc, as well as several support rods connecting the outer ring and the inner disc, are integrally welded together. A connecting hole is opened at the top axis of the lead screw 200, and a corresponding fixing hole is opened at the center of the inner disc. A fixing nut 400 is fitted into the connecting hole and the fixing hole. The handwheel 300 is fixed to the outer side of the top of the lead screw 200 by the fixing nut 400. The use of the fixing nut 400 facilitates the disassembly and installation of the handwheel 300 on the top of the lead screw 200. Several weight-reducing grooves 102 are opened through the middle of the outer wall of the support 100. The outer ring of the handwheel 300 is fitted with an anti-slip sleeve. The operator can turn the handwheel 300 outside the shaft, which provides a large operating space and facilitates the application of force. This not only makes the manual valve easy to open and close, but also reduces the safety hazards of entering and exiting the shaft. Turning the handwheel 300 drives the lead screw 200 to rotate and move downward, pushing the top rod 500 to move straight down and open the valve plate, thereby forcibly opening the shut-off valve.The weight is reduced by the support weight reduction groove 102 and locked by the fixing nut. It features a compact structure, labor-saving operation, and easy portability. It effectively solves the problem of emergency opening of wellhead shut-off valves when there is no power source. This utility model is a manual auxiliary opening device for gas field wellhead safety shut-off valves. It is simple in structure, easy to operate, and easy to carry. It is a manual forced opening tool for wellhead shut-off valves, which is easy to install and disassemble, facilitates regular maintenance of the device, has stable and reliable performance, improves the practical value of the device, improves emergency response time, reduces the risk of overpressure in gathering and transmission pipelines and equipment, ensures the safety of equipment and facilities in the station, and guarantees safe and stable gas use. If its drive system (such as hydraulic or pneumatic system) fails, it is a simple, reliable, portable forced opening tool that can directly act on the valve core, thereby improving safety and stability. At the same time, it realizes the switching between electric and manual operation, meets the needs of different working conditions, and expands the application range of the product.

[0076] Through structural improvements, it has a wide range of applications, more uniform force distribution between contact points, and the handwheel and device are less prone to failure. It has the advantages of making manual valve operation convenient, reducing safety hazards when operating manual valves, wide applicability, and low failure rate.

[0077] The above provides a detailed description of the safe-operating pneumatic emergency shut-off valve device provided by this utility model. Specific examples have been used to illustrate the implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the structure and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this application.

[0078] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A manual auxiliary opening device for a gas field wellhead safety shut-off valve, characterized in that, Includes a support (100), which is a hollow cylinder. The support (100) is connected to a shut-off valve at its lower axial part. A screw (200) is sleeved inside the support (100). The top of the screw (200) extends through the support (100), and a handwheel (300) is connected to the top axis of the screw (200).

2. The manual auxiliary opening device for the gas field wellhead safety shut-off valve according to claim 1, characterized in that, The support (100) is provided with a three-tiered step structure on the upper part, with the diameter of the three-tiered step structure increasing layer by layer from top to bottom.

3. The manual auxiliary opening device for the gas field wellhead safety shut-off valve according to claim 2, characterized in that, The support (100) has a first-level step structure at the bottom, and the diameter of the first-level step structure is not less than the diameter of the bottom layer of the three-level step structure.

4. The manual auxiliary opening device for the gas field wellhead safety shut-off valve according to claim 3, characterized in that, The inner wall of the first-stage stepped structure is provided with a fixed thread (101), which matches the outer thread on the top of the wellhead shut-off valve.

5. The manual auxiliary opening device for the gas field wellhead safety shut-off valve according to claim 4, characterized in that, The inner wall of the three-stage stepped structure is provided with an internal thread, which is connected to the external thread provided on the outer surface of the lead screw (200).

6. The manual auxiliary opening device for the gas field wellhead safety shut-off valve according to claim 5, characterized in that, The bottom of the lead screw (200) is connected to the bearing seat (600), and the center of the bearing seat (600) is vertically provided with a top rod (500). The diameter of the bearing seat (600) matches the diameter of the bottom layer of the three-stage structure. The bearing seat (600) can move towards the bottom of the support (100) along with the lead screw (200).

7. The manual auxiliary opening device for the gas field wellhead safety shut-off valve according to claim 6, characterized in that, The outer wall of the first-stage stepped structure has several through holes evenly spaced around it. Limiting screws are fitted into the through holes to fix the support (100) to the top of the shut-off valve.

8. The manual auxiliary opening device for the gas field wellhead safety shut-off valve according to claim 7, characterized in that, The handwheel (300) includes an outer ring and an inner disc, as well as several support rods connecting the outer ring and the inner disc. The support rods are evenly distributed circumferentially between the outer ring and the inner disc, and the angles between the support rods are the same.

9. The manual auxiliary opening device for the gas field wellhead safety shut-off valve according to claim 8, characterized in that, A connecting hole is opened at the top axis of the lead screw (200), and a fixing hole is opened at the center of the inner disc. A fixing nut (400) is sleeved in the connecting hole and the fixing hole. The handwheel (300) is fixed to the outer side of the top of the lead screw (200) by the fixing nut (400).

10. The manual auxiliary opening device for the gas field wellhead safety shut-off valve according to claim 9, characterized in that, Several weight-reducing grooves (102) are opened through the middle of the outer wall of the support (100), and the weight-reducing grooves (102) are evenly distributed in the middle of the outer wall of the support (100).

11. The manual auxiliary opening device for the gas field wellhead safety shut-off valve according to claim 10, characterized in that, The outer ring of the handwheel (300) is fitted with an anti-slip sleeve.

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