Valve rod nut structure

Abstract

The utility model relates to the technical field of valve rod nuts, and discloses a valve rod nut structure which comprises a limiting sleeve, a second threaded sleeve is fixedly connected to the bottom end of the limiting sleeve, an elastic assembly is arranged on the inner wall of the limiting sleeve, a rotating rod is rotationally connected to the rear side of the top end of the limiting sleeve, and a first clamping sleeve is fixedly connected to the outer wall of the rotating rod. The outer wall of the rotating rod is rotatably connected with a rotating sleeve, the outer wall of the rotating sleeve is fixedly connected with a second clamping sleeve, the inner wall of the first clamping sleeve is connected with a first threaded sleeve through a limiting assembly, the front end of the first clamping sleeve is fixedly connected with a first clamping block, the front end of the second clamping sleeve is fixedly connected with a second clamping block, and the second clamping block is connected with the first clamping block through a clamping assembly. In the installation process, due to the design of the spring and the fixing ring, threaded connection of the valve rod nut and the valve body is tighter, and when the first threaded sleeve is abraded due to thread slipping and the like, the whole valve rod nut does not need to be replaced, and only the first threaded sleeve needs to be replaced according to specific steps.

Description

Technical Field

[0001] This utility model relates to the field of valve stem nut technology, and in particular to a valve stem nut structure. Background Technology

[0002] As a key component of valves, the valve stem nut is widely used in various industrial pipeline systems and plays a crucial role in the normal operation of valves. In industries such as petroleum, chemical, and power, valves are extensively used to control the flow rate, pressure, and direction of media. The valve stem nut, through its threaded engagement with the valve stem, enables the valve to open and close. Its performance directly affects the stability and safety of the entire pipeline system.

[0003] In traditional valve stem nut applications, connection is typically achieved solely through the engagement of the threads. This method is inadequate when facing complex operating conditions such as frequent valve opening and closing and fluctuations in media pressure. Due to the lack of an effective auxiliary fastening structure, the valve stem nut is prone to loosening under long-term vibration and pressure changes. Once the valve stem nut loosens, it not only affects the valve's sealing performance, leading to media leakage, but may also cause valve malfunctions or even breakdowns, seriously threatening the normal operation of the entire industrial system and increasing maintenance costs and safety risks. To address this technical problem, this application proposes a new valve stem nut structure. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a valve stem nut structure. During installation, the design of the spring and retaining ring makes the threaded connection between the valve stem nut and the valve body more tight. When the threaded sleeve experiences wear problems such as stripping, it is not necessary to replace the entire valve stem nut; only the threaded sleeve needs to be replaced according to specific steps.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A valve stem nut structure includes a limiting sleeve, a threaded sleeve two fixedly connected to the bottom end of the limiting sleeve, an elastic component provided on the inner wall of the limiting sleeve, a rotating rod rotatably connected to the rear side of the top end of the limiting sleeve, a retaining sleeve one fixedly connected to the outer wall of the rotating rod, and a rotating sleeve rotatably connected to the outer wall of the rotating rod, a retaining sleeve two fixedly connected to the outer wall of the rotating sleeve, a threaded sleeve one connected to the inner wall of the retaining sleeve one through the limiting component, a locking block one fixedly connected to the front end of the retaining sleeve one, a locking block two fixedly connected to the front end of the retaining sleeve two, and the locking block two connected to the locking block one through a locking component.

[0007] Furthermore, the elastic component includes a fixed ring located on the inner wall of the limiting sleeve and connected by a spring, with one end of the spring connected to the inner wall of the limiting sleeve and the other end of the spring connected to the top of the fixed ring.

[0008] Furthermore, the limiting component includes a limiting tenon one and a limiting tenon two located on the outer wall of the screw sleeve one, and the limiting tenon one and the limiting tenon two are disposed in the groove of the sleeve one.

[0009] Furthermore, the engaging assembly includes a nut located on the inner wall of the engaging block two. The nut is rotatably connected to the inner wall of the engaging block two. A screw is threadedly connected to the inner wall of the nut. A washer is fixedly connected to the outer wall of the screw. The washer is located at the left end of the engaging block one.

[0010] Furthermore, a handle is fixedly connected to the left end of the screw.

[0011] Furthermore, the inner wall of the first threaded sleeve is provided with a threaded groove, and the outer wall of the second threaded sleeve is provided with a threaded groove.

[0012] Furthermore, the second limiting tenon is horizontally disposed on the outer wall of the first threaded sleeve, and the first limiting tenon is vertically disposed on the outer wall of the first threaded sleeve.

[0013] Furthermore, the gasket is made from rubber.

[0014] This utility model has the following beneficial effects:

[0015] 1. In this utility model, during installation, the design of the spring and the retaining ring makes the valve stem nut and the valve body threaded connection tighter. This structure effectively avoids the valve stem nut from loosening under complex working conditions such as frequent opening and closing of the valve and fluctuation of medium pressure, thus ensuring the normal operation of the valve.

[0016] 2. In this utility model, when the threaded sleeve 1 experiences wear problems such as stripping, it is not necessary to replace the entire valve stem nut; only the threaded sleeve 1 needs to be replaced according to specific steps. This design of replaceable worn parts greatly saves maintenance costs, shortens maintenance time, improves valve maintenance efficiency, and reduces production interruption time caused by valve repair. Attached Figure Description

[0017] Figure 1 This is a perspective view of a valve stem nut structure proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the rotating rod structure of a valve stem nut structure proposed in this utility model;

[0019] Figure 3 This is a schematic diagram of the limiting tenon structure of a valve stem nut structure proposed in this utility model;

[0020] Figure 4 for Figure 3 Enlarged view of point A;

[0021] Figure 5 This is a schematic diagram of the spring structure of a valve stem nut structure proposed in this utility model.

[0022] Legend:

[0023] 1. Sleeve 1; 2. Clamping block 1; 3. Rotating rod; 4. Rotating sleeve; 5. Sleeve 2; 6. Clamping block 2; 7. Limiting tenon 1; 8. Limiting tenon 2; 9. Threaded sleeve 1; 10. Nut; 11. Threaded rod; 12. Handle; 13. Washer; 14. Limiting sleeve; 15. Threaded sleeve 2; 16. Spring; 17. Retaining ring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Reference Figure 1 , Figure 2 and Figure 5 The present invention provides an embodiment of a valve stem nut structure, including a limiting sleeve 14, a threaded sleeve 15 fixedly connected to the bottom end of the limiting sleeve 14, a spring 16 and a fixing ring 17 provided on the inner wall of the limiting sleeve 14, a rotating rod 3 rotatably connected to the rear side of the top end of the limiting sleeve 14, a retaining sleeve 1 fixedly connected to the outer wall of the rotating rod 3, and a rotating sleeve 4 rotatably connected to the outer wall of the rotating rod 3, a retaining sleeve 2 5 fixedly connected to the outer wall of the rotating sleeve 4, a threaded sleeve 9 connected to the inner wall of the retaining sleeve 1 through a limiting tenon 1 and a limiting tenon 2 8, a retaining block 2 fixedly connected to the front end of the retaining sleeve 1, a retaining block 2 6 fixedly connected to the front end of the retaining sleeve 2 5, and a retaining block 2 6 connected to the retaining block 2 through a nut 10, a screw 11 and a washer 13;

[0026] Specifically, when installing the valve stem nut, it is connected to the valve body via the threaded sleeve 15. As the valve stem nut gradually approaches and screws into the valve body, the valve body first contacts the retaining ring 17. As installation progresses, the valve body continuously compresses the retaining ring 17, thereby compressing the spring 16. When the valve stem nut is fully installed, the spring 16, due to its own elastic restoring force, pushes the retaining ring 17, making the threaded connection between the valve stem nut and the valve body tighter, enhancing the stability and sealing of the connection, and effectively preventing the valve stem nut from loosening due to vibration or other factors during valve operation. In subsequent use of the valve stem nut, if the threaded sleeve 9 shows signs of wear such as stripping, affecting normal use, the operator can hold the handle 12 and rotate it. The handle 12 drives the screw 11 to rotate synchronously. 11 and nut 10 are threaded together. The rotation of screw 11 will cause it to move inside nut 10, thereby gradually increasing the distance between washer 13 and nut 10. Washer 13 is fixed on screw 11. Engaging block 12 contacts washer 13, and engaging block 2 is connected to nut 10. Therefore, the increase in the distance between washer 13 and nut 10 will also increase the distance between engaging block 12 and engaging block 2. At this time, nut 10 can be rotated to separate washer 13 from engaging block 12. Then, sleeve 1 and sleeve 2 5 are rotated. Since limiting tenon 1 7 and limiting tenon 2 8 are respectively set in the groove of sleeve 1, rotating sleeve 1 and sleeve 2 5 can disengage limiting tenon 1 7 and limiting tenon 2 8 from the groove of sleeve 1, so that worn sleeve 1 9 can be removed.

[0027] Reference Figures 3-5 The fixed ring 17 is located on the inner wall of the limiting sleeve 14 and connected by a spring 16. One end of the spring 16 is connected to the inner wall of the limiting sleeve 14, and the other end of the spring 16 is connected to the top of the fixed ring 17. The limiting tenon 1 7 and the limiting tenon 2 8 are located on the outer wall of the screw sleeve 1 9 and are set in the groove of the clamping sleeve 1. The nut 10 is located on the inner wall of the clamping block 2 6 and is rotatably connected to the inner wall of the clamping block 2 6. The inner wall of the nut 10 is threadedly connected to the screw rod 11. The outer wall of the screw rod 11 is fixedly connected to the washer 13. The washer 13 is located at the left end of the clamping block 2. The left end of the screw rod 11 is fixedly connected to the handle 12. The inner wall of the screw sleeve 1 9 is provided with a threaded groove. The outer wall of the screw sleeve 2 15 is provided with a threaded groove. The limiting tenon 2 8 is set horizontally on the outer wall of the screw sleeve 1 9, and the limiting tenon 1 7 is set vertically on the outer wall of the screw sleeve 1 9. The washer 13 is made of rubber.

[0028] Specifically, when installing the new threaded sleeve 9, firstly, insert the limiting tenon 7 and limiting tenon 8 on the new threaded sleeve 9 into the corresponding grooves on the retaining sleeve 1. Then, merge retaining sleeve 1 and retaining sleeve 2 5, so that the threaded sleeve 9 is limited between retaining sleeve 1 and retaining sleeve 2 5. After that, rotate the screw 11 so that the washer 13 is engaged with the left side of the engaging block 2. At the same time, continue to rotate the handle 12, causing the screw 11 to rotate inside the nut 10. As the screw 11 rotates, the distance between the washer 13 and the nut 10 decreases. Through the interaction between the washer 13 and the nut 10, the distance between engaging block 1 2 and engaging block 2 6 is brought closer, thereby fixing retaining sleeve 1 and retaining sleeve 2 5 and completing the installation of the new threaded sleeve 9. The limiting tenon 7 is vertically set on the outer wall of the threaded sleeve 9 and is engaged with the groove of retaining sleeve 1. The fittings restrict the position of the threaded sleeve 19 within the retaining sleeve 1, preventing displacement of the threaded sleeve 19 when not being replaced and ensuring its normal operation. The limiting tenon 2 8 is laterally positioned on the outer wall of the threaded sleeve 19, working together with the limiting tenon 1 7 to further enhance the limiting effect of the threaded sleeve 19 within the retaining sleeve 1, keeping it stable in the valve stem nut structure. The handle 12 is fixed to the left end of the screw 11, making it convenient for the operator to hold and rotate the screw 11, providing an operating point for adjusting the distance between the retaining block 1 2 and the retaining block 2 6 and replacing the threaded sleeve 19. The gasket 13 is made of rubber and has a certain degree of elasticity. It is positioned at the left end of the retaining block 1 2, playing a buffering and sealing role when the retaining block 1 2 and the retaining block 2 6 are connected, while also enhancing the stability of the connection and preventing loosening due to vibration or other factors.

[0029] Working principle: The valve stem nut is installed onto the valve body via the threaded sleeve 15. As the valve stem nut slowly moves through the threaded sleeve 15, the valve body first contacts the retaining ring 17. During installation, the retaining ring 17 compresses the spring 16. When the valve stem nut is fully installed onto the valve body, the elasticity of the spring 16 makes the valve stem nut and valve body threads tighter. In subsequent use, if the threaded sleeve 9 strips, simply grasp the handle 12 and rotate it to rotate the screw 11, gradually increasing the distance between the washer 13 and the nut 10. This increases the distance between the locking block 2 and the locking block 6, allowing the nut 10 to be rotated, separating the washer 13 from the locking block 2. Then, rotate sleeve 1 and sleeve 2 5 to separate the limiting tenon 1 7 and limiting tenon 2 8 from the groove of sleeve 1, so that the threaded sleeve 9 can be removed and replaced. When installing the new threaded sleeve 9, insert the limiting tenon 1 7 and limiting tenon 2 8 on the threaded sleeve 9 into the corresponding groove on sleeve 1. Then, merge sleeve 1 and sleeve 2 5 to limit the threaded sleeve 9 within sleeve 1 and sleeve 2 5. Then, rotate screw 11 to snap washer 13 into the left side of locking block 2. At the same time, rotate handle 12 to rotate screw 11 within nut 10. Through washer 13 and nut 10, the distance between locking block 2 and locking block 2 6 is reduced, thereby fixing sleeve 1 and sleeve 2 5 and completing the installation of threaded sleeve 9.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A valve stem nut structure characterized by: Includes a limiting sleeve (14), the bottom end of which is fixedly connected to a threaded sleeve (15), the inner wall of which is provided with an elastic component, the rear side of the top end of which is rotatably connected to a rotating rod (3), the outer wall of which is fixedly connected to a retaining sleeve (1), and the outer wall of which is rotatably connected to a rotating sleeve (4), the outer wall of which is fixedly connected to a retaining sleeve (5), the inner wall of which is connected to a threaded sleeve (9) through a limiting component, the front end of which is fixedly connected to a locking block (2), the front end of which is fixedly connected to a locking block (6), and the locking block (6) is connected to the locking block (2) through a locking component.

2. A valve stem nut structure according to claim 1, wherein: The elastic component includes a fixed ring (17) located on the inner wall of the limiting sleeve (14) and connected by a spring (16). One end of the spring (16) is connected to the inner wall of the limiting sleeve (14), and the other end of the spring (16) is connected to the top of the fixed ring (17).

3. A valve stem nut structure according to claim 1, wherein: The limiting component includes a limiting tenon 1 (7) and a limiting tenon 2 (8) located on the outer wall of the screw sleeve 1 (9), and the limiting tenon 1 (7) and the limiting tenon 2 (8) are arranged in the groove of the sleeve 1 (1).

4. A valve stem nut structure according to claim 1, wherein: The engaging assembly includes a nut (10) located on the inner wall of engaging block two (6). The nut (10) is rotatably connected to the inner wall of engaging block two (6). A screw (11) is threadedly connected to the inner wall of the nut (10). A washer (13) is fixedly connected to the outer wall of the screw (11). The washer (13) is located at the left end of engaging block one (2).

5. A valve stem nut structure according to claim 4, wherein: A handle (12) is fixedly connected to the left end of the screw (11).

6. A valve stem nut structure according to claim 1 wherein: The inner wall of the first threaded sleeve (9) is provided with a threaded groove, and the outer wall of the second threaded sleeve (15) is provided with a threaded groove.

7. A valve stem nut structure according to claim 3 wherein: The limiting tenon 2 (8) is horizontally arranged on the outer wall of the threaded sleeve 1 (9), and the limiting tenon 1 (7) is vertically arranged on the outer wall of the threaded sleeve 1 (9).

8. A valve stem nut structure according to claim 4 wherein: The gasket (13) is made from rubber.

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