A manually operated opening device for a surface safety valve

Abstract

The application discloses a kind of ground safety valve manual opening device, it includes, rotating joint, rotating hand wheel is connected with the top of rotating joint;Bearing seat, located below rotating joint, bearing seat inside is provided with rotating shaft, rotating shaft is fixedly connected with rotating joint;Ball screw, ball screw top end is located in rotating joint and extends to rotating shaft, rotating shaft is provided with screw nut, ball screw and screw nut are connected by ball;Fixed joint, located below bearing seat and is fixedly connected with bearing seat, ball screw bottom end is located in the guide slot of fixed joint.The safety valve torque of the application is small, and the axial force is large, firm and reliable, easy to install, disassemble and maintain, long service life, wide application range.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and in particular to a manual opening device for a ground safety valve. Background Technology

[0002] The surface safety valve is a crucial component of the oil wellhead. In emergencies such as fires or excessive well pressure, the surface safety valve can quickly close the wellhead by releasing pressure within the actuator cylinder, utilizing spring force. Normally, the surface safety valve is closed during operation. However, when there is no pressure source on the well surface and emergency pressure relief or valve maintenance is required, the surface safety valve can be opened using a manual opening device.

[0003] Currently, manual opening devices for safety valves are difficult or even impossible to open safety valves with excessive axial force. Now, through design improvements, a manual opening device with high load-bearing capacity and low torque has been invented. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A manual opening device for a ground safety valve includes a rotary joint, with a rotary handwheel connected to the top of the rotary joint; a bearing seat located below the rotary joint, with a rotating shaft disposed inside the bearing seat and the rotating shaft fixedly connected to the rotary joint; a ball screw, with the top of the ball screw located inside the rotary joint and extending into the rotating shaft, and a screw nut disposed inside the rotating shaft, the ball screw and the screw nut being connected by balls; and a fixed joint located below the bearing seat and fixedly connected to the bearing seat, with the bottom end of the ball screw located in the guide groove of the fixed joint.

[0006] As a preferred embodiment of the manual opening device for the ground safety valve described in this invention, the rotary joint and the rotary handwheel are provided with pin holes, and the two are fixedly connected by a pin shaft and a cotter pin.

[0007] As a preferred embodiment of the manual opening device for the ground safety valve described in this invention, an O-ring is provided at the connection position between the rotary joint and the rotary handwheel.

[0008] In a preferred embodiment of the manual opening device for the ground safety valve described in this invention, the rotating shaft and the rotating joint are fixedly connected by a first internal hexagon screw, and the lead screw nut is threadedly connected to the rotating shaft.

[0009] As a preferred embodiment of the manual opening device for the ground safety valve described in this invention, the ball screw has a threaded hole at its top end, and a limit ring is fixed to the top end of the ball screw by a second internal hexagon screw, and the radius of the limit ring is larger than the radius of the ball screw.

[0010] As a preferred embodiment of the manual opening device for the ground safety valve described in this invention, an upper bearing is provided between the bearing housing and the rotating shaft, and the upper bearing is installed in the space formed by the bearing housing and the rotating shaft.

[0011] As a preferred embodiment of the manual opening device for the ground safety valve described in this invention, a lower bearing is provided between the bearing housing, the rotating shaft, and the fixed joint, and the lower bearing is installed in the space formed by the bearing housing, the rotating shaft, and the fixed joint.

[0012] As a preferred embodiment of the manual opening device for the ground safety valve described in this invention, the ball screw is provided with symmetrical limit grooves at its bottom end, and a guide block is provided in the limit groove. The guide block is fixedly connected to the ball screw through a pressure cap, and the guide block extends into the guide groove of the fixed joint.

[0013] In a preferred embodiment of the manual opening device for the ground safety valve described in this invention, the fixed joint and the bearing seat are connected by threads and fixed by fastening screws.

[0014] In a preferred embodiment of the manual opening device for the ground safety valve described in this invention, an oil cup is provided on the bearing seat.

[0015] The beneficial effects of this invention are as follows: The manual opening device for the ground safety valve of this invention has a small opening torque, a large axial force bearing capacity, is robust and reliable, is easy to install, disassemble and maintain, has a long service life and a wide range of applications. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the connection structure between the present invention and the driver.

[0019] Figure 3 This is a schematic diagram of the exploded structure of the present invention.

[0020] Figure 4 This is a partial structural diagram of the present invention.

[0021] Figure 5 This is a schematic diagram of the exploded structure of the ball screw of the present invention. Detailed Implementation

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0025] Example 1

[0026] Reference Figures 1 to 2 This is the first embodiment of the present invention, which provides a manual opening device for a ground safety valve, comprising a rotary joint 100, a bearing seat 200, a rotating shaft 300, a ball screw 400, a screw nut 500, and a fixed joint 600. A rotating handwheel 101 is connected to the top of the rotary joint 100, and rotating the rotary joint 100 is driven to rotate by rotating the handwheel 101. The bearing seat 200 is located below the rotary joint 100, and the rotating shaft 300 is disposed inside the bearing seat 200. The rotating shaft 300 is fixedly connected to the rotary joint 100, and rotating the rotary joint 100 drives the rotating shaft 300 fixedly connected to it to rotate. The ball screw 400 has a top end... The rotating joint 100 extends into the rotating shaft 300, where a lead screw nut 500 is installed. The ball screw 400 and the lead screw nut 500 are connected by balls. The combination of the ball screw 400 and the lead screw nut 500 results in smooth movement, high transmission efficiency, high precision, and high reliability. It can minimize torque, allowing the ground safety valve with excessive axial force to open more easily and efficiently. The fixed joint 600 is located below the bearing seat 200 and is fixedly connected to the bearing seat 200. The bottom end of the ball screw 400 is located in the guide groove 601 of the fixed joint 600. The guide groove 601 extends downward along the inner wall of the fixed joint 600 to limit the rotation of the ball screw 400.

[0027] During installation, the rotary joint 100 and the rotary handwheel 101 are fixedly connected. The ball screw 400 and the screw nut 500 are connected by ball bearings and can rotate flexibly. The screw nut 500 is installed in the rotating shaft 300. Then, the rotary joint 100 and the rotating shaft 300 are fixedly connected, and the screw nut 500 in the rotating shaft 300 is fixed. At this time, the rotary handwheel 101, rotary joint 100, rotating shaft 300, ball screw 400 and screw nut 500 form a whole, called the rotary assembly. Then, the fixed joint 600 is installed and fixedly connected to the bearing seat 200. The bottom end of the ball screw 400 is located in the guide groove 601 of the fixed joint 600. Finally, the fixed joint is connected to the upper part of the safety valve actuator by thread and fixed with a set screw. The bottom end of the ball screw 400 abuts against the actuator indicator rod.

[0028] When the safety valve needs to be opened, the handwheel 101 is turned. Turning the handwheel 101 drives the rotary joint 100 to rotate, which in turn drives the rotating shaft 300 fixedly connected to it to rotate. The rotating shaft 300 then drives the lead screw nut 500 within it to rotate synchronously. Because the ball screw 400 is in the guide groove 601 of the fixed joint 600, it cannot rotate synchronously with the lead screw nut 500. Under the transmission of the lead screw nut 500, the ball screw 400 moves downwards. This downward movement of the ball screw 400 exerts pressure on the driver indicator rod, forcing... This causes the valve to move downwards synchronously, gradually opening the ground safety valve. When it is necessary to close the safety valve, turn the handwheel 101 in the opposite direction. Turning the handwheel 101 drives the rotary joint 100 to rotate, which in turn drives the rotary shaft 300 fixedly connected to it to rotate. The rotation of the rotary shaft 300 drives the lead screw nut 500 inside it to rotate synchronously. At this time, under the transmission of the lead screw nut 500, the ball screw 400 moves upward. The pressure generated by the upward movement of the ball screw 400 on the driver indicator rod disappears, and the spring of the driver will automatically close the valve by relying on its elastic force.

[0029] This invention uses the rotating handwheel 101 to drive the screw nut 500 to rotate synchronously, causing the ball screw 400 to move downward to open the valve plate. Ultimately, this allows the ground safety valve with excessive axial force to open more easily and efficiently, greatly reducing the opening torque of the safety valve.

[0030] Example 2

[0031] Reference Figures 1 to 5This is the second embodiment of the invention, which differs from the first embodiment in that: pin holes are provided on the rotary joint 100 and the rotary handwheel 101, and the two are fixedly connected by a pin 101a and a cotter pin 101b. An O-ring 102 is provided at the connection position of the rotary joint 100 and the rotary handwheel 101. During installation, the pin holes of the rotary joint 100 and the rotary handwheel 101 are aligned, and the two are connected by the cotter pin 101, and finally locked by the cotter pin 101b. The O-ring 102 is arranged at the connection position of the rotary joint 100 and the rotary handwheel 101, which can effectively prevent dust, water and other impurities from entering the ball screw 400 from the connection gap of the rotary joint 100 and the rotary handwheel 101, so as to prevent the operating force of the ball screw 400 from being affected.

[0032] Furthermore, the rotating shaft 300 and the rotating joint 100 are fixedly connected by a first hex socket screw 103, and the lead screw nut 500 is threadedly connected to the rotating shaft 300. During installation, the lead screw nut 500 is threadedly connected to the rotating shaft 300, and then the rotating joint 100 is installed on the rotating shaft 300 and fixed by the first hex socket screw 103, while simultaneously fixing the lead screw nut 500.

[0033] Furthermore, a threaded hole 401 is provided at the top of the ball screw 400. A retaining ring 403 is fixed to the top of the ball screw 400 by a second hexagon socket screw 401, and the radius of the retaining ring 403 is larger than the radius of the ball screw 400. After the screw nut 500 and the ball screw 400 are connected by balls and can rotate flexibly relative to each other, the retaining ring 403 is fixedly installed at the top of the ball screw 400 by the second hexagon socket screw 401. Since the radius of the retaining ring 403 is larger than the radius of the ball screw 400, it can effectively prevent the ball screw 400 and the screw nut 500 from disengaging and prevent the balls from falling out.

[0034] Furthermore, an upper bearing 201 is provided between the bearing housing 200 and the rotating shaft 300, and the upper bearing 201 is installed within the space formed by the bearing housing 200 and the rotating shaft 300. A lower bearing 202 is provided between the bearing housing 200, the rotating shaft 300, and the fixed joint 600, and the lower bearing 202 is installed within the space formed by the bearing housing 200, the rotating shaft 300, and the fixed joint 600. The upper bearing 201 and the lower bearing 202 facilitate the rotation of the rotating shaft 300. The upper bearing 201 is installed on the shoulder of the rotating shaft 300, located within the space formed by the bearing housing 200 and the rotating shaft 300. The lower bearing 202 is installed on the upper end face of the fixed joint 600, and the lower bearing 202 is located within the space formed by the bearing housing 200, the rotating shaft 300, and the fixed joint 600.

[0035] Furthermore, the ball screw 400 is symmetrically provided with limiting grooves 404 at its bottom end. A guide block 405 is provided in the limiting groove 404. The guide block 405 is fixedly connected to the ball screw 400 through a pressure cap 406. The guide block 405 extends into the guide groove 601 of the fixed joint 600. During installation, the guide block 405 is installed in the limiting groove 404 at the bottom end of the ball screw 400. Then, the pressure cap 406 is connected to the ball screw 400 by threads to fix the guide block 405. The guide block 405 extends into the guide groove 601 of the fixed joint 600. At this time, under the limiting action of the guide block 405 and the guide groove 601, the ball screw 400 cannot rotate. Thus, when the screw nut 500 rotates, the ball screw 400 moves up and down along the guide groove 601.

[0036] Furthermore, the fixed joint 600 and the bearing housing 200 are connected by threads and secured with fastening screws 602. After the handwheel 101, rotating joint 100, rotating shaft 300, ball screw 400, and screw nut 500 are all installed, the guide block 405 at the bottom of the ball screw 400 is aligned with the guide groove 601 of the fixed joint 600, and then the bearing housing 200 and the fixed joint 600 are connected by threads and secured with fastening screws 602. The bearing housing 200 is equipped with an oil cup 203, allowing for maintenance of the upper bearing 201 and lower bearing 202 without disassembly.

[0037] During installation, the rotary joint 100 and the handwheel 101 are locked together using pin 101a and cotter pin 101b, and the O-ring 102 is installed on the rotary joint 100. The ball screw 400 and screw nut 500 are connected by ball bearings and can rotate flexibly. The limit retaining ring 403 is installed on the upper end of the ball screw 400 and fixed with the second internal hex screw 401. The screw nut 500 is connected to the rotating shaft 300 by threads. The rotary joint 100 is installed on the rotating shaft 300 and fixed with the first internal hex screw 103, simultaneously fixing the screw nut 500. The guide block 405 is installed in the limit groove 404 of the ball screw 400, and the pressure cap 406 is connected to the ball screw 400 by threads to fix the guide block 405. At this time, the first internal hex screw... The rotating assembly consists of a pin 103, a rotating joint 100, an O-ring 102, a pin 101a, a cotter pin 101b, a rotating handwheel 101, a limit retaining ring 403, a second internal hexagon screw 401, a ball screw 400, a screw nut 500, and a rotating shaft 300. The lower bearing 202 is installed on the upper end face of the fixed joint 600. The guide block 405 is aligned with the guide groove 601 of the fixed joint 600, and then the rotating assembly is installed on the fixed joint 600 and the lower bearing 202. The upper bearing 201 is installed on the shoulder of the rotating shaft 300. The dust retainer is installed in the bearing seat groove. The 200 and the fixed joint 600 are connected by threads and secured with fastening screws 602. Finally, the fixed joint 600 is connected to the upper part of the safety valve actuator by threads and secured with set screws.

[0038] When the safety valve needs to be opened, turn the handwheel 101. Turning the handwheel 101 drives the rotary joint 100 to rotate, which in turn drives the rotary shaft 300 fixedly connected to it to rotate. The rotation of the rotary shaft 300 drives the lead screw nut 500 inside it to rotate synchronously. Because the ball screw 400 is in the guide groove 601 of the fixed joint 600, it cannot rotate synchronously with the lead screw nut 500. At this time, under the transmission of the lead screw nut 500, the ball screw 400 moves downward. The downward movement of the ball screw 400 exerts pressure on the driver indicator rod, forcing it to... It moves down synchronously, thereby gradually opening the ground safety valve; when it is necessary to close the safety valve, turn the handwheel 101 in the opposite direction. Turning the handwheel 101 drives the rotary joint 100 to rotate. The rotation of the rotary joint 100 drives the rotary shaft 300 fixedly connected to it to rotate. The rotation of the rotary shaft 300 drives the lead screw nut 500 inside it to rotate synchronously. At this time, under the transmission of the lead screw nut 500, the ball screw 400 moves upward. The pressure generated by the upward movement of the ball screw 400 on the driver indicator rod disappears, and the spring of the driver will automatically close the valve by relying on its elastic force.

[0039] This device employs a ball screw 400 force-saving mechanism and bearing rotation, significantly reducing the opening torque of the safety valve. It features a guide block 405 and guide groove 601, providing excellent guiding and anti-rotation functions. A dustproof device effectively prevents internal components from getting damp. The bearing housing 200 has an oil cup 203, allowing for bearing maintenance without disassembly. The ball screw 400 has a lead of 6mm, moving 6mm with each rotation, ensuring low torque while improving the safety valve's opening and closing efficiency. Furthermore, its robust structure makes it easy to install and disassemble.

[0040] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A manual opening device for a ground safety valve, characterized in that: include, Rotary joint (100), with a rotating handwheel (101) connected to the top of the rotary joint (100). The bearing housing (200) is located below the rotary joint (100). A rotating shaft (300) is provided inside the bearing housing (200), and the rotating shaft (300) is fixedly connected to the rotary joint (100). A ball screw (400) has its top end located inside a rotary joint (100) and extends into a rotating shaft (300). A screw nut (500) is provided inside the rotating shaft (300). The ball screw (400) and the screw nut (500) are connected by balls. A fixed joint (600) is located below the bearing housing (200) and is fixedly connected to the bearing housing (200). The bottom end of the ball screw (400) is located in the guide groove (601) of the fixed joint (600). An upper bearing (201) is provided between the bearing housing (200) and the rotating shaft (300), and the upper bearing (201) is installed in the space formed by the bearing housing (200) and the rotating shaft (300); A lower bearing (202) is provided between the bearing housing (200), the rotating shaft (300) and the fixed joint (600), and the lower bearing (202) is installed in the space formed by the bearing housing (200), the rotating shaft (300) and the fixed joint (600); The ball screw (400) is symmetrically provided with limiting grooves (404) at the bottom end. A guide block (405) is provided in the limiting groove (404). The guide block (405) is fixedly connected to the ball screw (400) through a pressure cap (406). The guide block (405) extends into the guide groove (601) of the fixed joint (600).

2. The manual opening device for a ground safety valve as described in claim 1, characterized in that: The rotary joint (100) and the rotary handwheel (101) are provided with pin holes, and the two are fixedly connected by a pin (101a) and a cotter pin (101b).

3. The manual opening device for a ground safety valve as described in claim 2, characterized in that: An O-ring (102) is provided at the connection position between the rotary joint (100) and the rotary handwheel (101).

4. The manual opening device for a ground safety valve as described in any one of claims 1-3, characterized in that: The rotating shaft (300) and the rotating joint (100) are fixedly connected by a first internal hex screw (103), and the lead screw nut (500) is connected to the rotating shaft (300) by a thread.

5. The manual opening device for a ground safety valve as described in claim 4, characterized in that: The ball screw (400) has a threaded hole (401) at its top end. A limit ring (403) is fixed to the top end of the ball screw (400) by a second internal hex screw (402), and the radius of the limit ring (403) is greater than the radius of the ball screw (400).

6. The manual opening device for a ground safety valve as described in claim 5, characterized in that: The fixed joint (600) and the bearing housing (200) are connected by threads and fixed together by fastening screws (602).

7. The manual opening device for a ground safety valve as described in claim 6, characterized in that: An oil cup (203) is provided on the bearing housing (200).

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