Anti-loose valve stem nut

Abstract

This utility model relates to the field of nut technology, specifically an anti-loosening valve stem nut, including a screw with six slots, a nut on the outer wall of the screw, and a nut body with its inner wall threaded to the screw. The advantages are: by the screw and nut working together, rotating the hexagonal movable block with a tool causes the nut body to rotate and connect with the screw threadedly until the nut body reaches the desired position. Sliding the hexagonal movable block downwards along the sliding groove allows the rotating block to engage with the slot on the screw, quickly fixing and preventing loosening of the nut. During maintenance, simply sliding the hexagonal movable block upwards causes the hexagonal movable block body to press against the spring, pushing the pusher block to contact and rotate the rotating block, disengaging the locking block from the slot, allowing the nut to be removed from the screw, thus improving the efficiency of maintenance personnel.

Description

Technical Field

[0001] This utility model relates to the field of nut technology, specifically to an anti-loosening valve stem nut. Background Technology

[0002] Anti-loosening valve stem nuts are critical fasteners used in valves to prevent them from loosening during operation due to vibration, impact, or other external forces. They are widely used in oil and steam pipeline systems in industries such as petrochemicals and thermal power plants to ensure stable valve operation and safety.

[0003] In existing technologies, anti-loosening valve stem nuts typically employ various anti-loosening mechanisms, such as mechanical anti-loosening, friction anti-loosening, riveting anti-loosening, and structural anti-loosening. Mechanical anti-loosening restricts the relative rotation of the nut pair using locking washers, cotter pins, etc.; friction anti-loosening utilizes elastic washers, double nuts, etc., to increase friction; riveting anti-loosening creates a non-removable connection by disrupting the integrity of the nut pair; and structural anti-loosening relies on the nut's own special structural design to achieve the anti-loosening effect. These technologies solve the problem of nut loosening to some extent, but they also bring difficulties in disassembly.

[0004] With the development of industrial automation and intelligence, the requirements for the efficiency and convenience of valve maintenance are getting higher and higher. Existing anti-loosening technology may not be able to meet the needs of quick disassembly and reinstallation, and disassembly may damage the bolts and the end face of the nut and the surface of the pressed parts. Utility Model Content

[0005] The purpose of this invention is to provide an anti-loosening valve stem nut to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an anti-loosening valve stem nut, comprising a screw, the screw having six slots, a nut being provided on the outer wall of the screw, the nut comprising a nut body, the inner wall of the nut body being threadedly connected to the screw;

[0007] The bottom of the nut body has six rotating grooves, and the inner walls of the six rotating grooves are rotatably connected to rotating blocks. One side of each of the six rotating blocks is fixedly connected to a locking block, and the six locking blocks are engaged with the six locking grooves on the screw.

[0008] Preferably, the nut body has six sliding grooves on its side wall, and a hexagonal movable block is slidably connected to the outer wall of the nut body.

[0009] Preferably, the hexagonal movable block includes a hexagonal movable block body, and six sliding blocks are fixedly connected to the inner wall of the hexagonal movable block body. The sliding blocks are slidably connected to the inner wall of the sliding groove, and six storage slots are provided on the inner wall of the hexagonal movable block body.

[0010] Preferably, the side wall of the nut body is provided with six limiting grooves, and the inner wall of the limiting groove is provided with a spring piece. When the hexagonal movable block is at the bottom of the nut body, the spring piece is engaged with the inner wall of the storage groove.

[0011] Preferably, the inner wall of the limiting groove is provided with a slide rail, the inner wall of the slide rail is slidably connected with a sliding plate, and a pushing block is fixedly connected to one side of the sliding plate.

[0012] Preferably, the top of the locking block is provided with a slope. When the hexagonal movable block is at the top of the nut body, the spring plate extends to make the sliding plate contact the slope of the locking block, pushing the rotating block to rotate and disengage from the locking groove provided on the screw.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This utility model proposes an anti-loosening valve stem nut. The nut is secured by a screw and a rotating hexagonal movable block. A tool rotates the hexagonal movable block, causing the nut body to rotate and connect with the screw thread. Once the nut body reaches the desired position, the hexagonal movable block is slid downwards along a sliding groove, engaging the rotating block into the groove. This engages the locking block with a slot on the screw, quickly securing the nut and preventing loosening. For maintenance, simply slide the hexagonal movable block upwards, causing it to press against a spring, pushing a pusher block to contact and rotate the rotating block, disengaging the locking block from the slot. This allows the nut to be removed from the screw, improving maintenance efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the nut in this practical application;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the nut body of this utility model;

[0018] Figure 4 This is a schematic diagram of the hexagonal movable block structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the screw structure of this utility model.

[0020] In the diagram: 1. Screw; 2. Nut; 21. Nut body; 22. Sliding groove; 23. Rotating groove; 24. Rotating block; 25. Limiting groove; 26. Spring piece; 27. Hexagonal movable block; 28. Locking block; 29. ​​Sliding plate; 210. Pushing block; 211. Slide rail; 271. Hexagonal movable block body; 272. Sliding block; 273. Storage groove. Detailed Implementation

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

[0022] Please see the appendix Figure 1-5 This application provides the following technical solutions.

[0023] A valve stem nut designed to prevent loosening includes a screw 1 with six slots. A nut 2 is mounted on the outer wall of the screw 1. The nut 2 includes a nut body 21, the inner wall of which is threaded to the screw 1. The bottom of the nut body 21 has six rotating grooves 23. Rotating blocks 24 are rotatably connected to the inner walls of the six rotating grooves 23. A locking block 28 is fixedly connected to one side of each of the six rotating blocks 24. The six locking blocks 28 engage with the six slots on the screw 1. The side wall of the nut body 21 has six sliding grooves 22. A hexagonal movable block 27 is slidably connected to the outer wall of the nut body 21. The hexagonal movable block 27 includes a hexagonal movable block body 271. Six sliding blocks 272 are fixedly connected to the inner wall of the hexagonal movable block body 271. The sliding blocks 272 are slidably connected to the inner walls of the sliding grooves 22. The inner wall of the hexagonal movable block body 271 has six storage slots 273.

[0024] It should be noted that during use, the operator places the nut 2 on top of the screw 1, uses a tool to fasten it to the outer wall of the hexagonal movable block 27, and rotates the hexagonal movable block 27 to drive the nut body 21 to rotate, causing the inner wall of the nut body 21 to make threaded movement with the screw 1. The nut body 21 moves on the screw 1 until it reaches the desired fixed position. The operator can slide the hexagonal movable block 27 upward along the inner wall of the sliding groove 22 through the sliding block 272 until the spring piece 26 is inserted into the inner wall of the storage groove 273. At this time, the hexagonal movable block body 271 pushes and squeezes the rotating block 24, causing the rotating block 24 to rotate in the inner wall of the rotating groove 23, driving the locking block 28 to be inserted into the locking groove set on the screw 1, so that the nut body 21 cannot rotate. At the same time, the spring piece 26 makes it difficult for the hexagonal movable block 27 to slide, thus realizing the quick installation of the nut 2 and the screw 1.

[0025] The nut body 21 has six limiting grooves 25 on its side wall. The inner wall of the limiting groove 25 is provided with a spring piece 26. When the hexagonal movable block 27 is at the bottom of the nut body 21, the spring piece 26 is engaged with the inner wall of the storage groove 273. The inner wall of the limiting groove 25 is provided with a slide rail 211. The inner wall of the slide rail 211 is slidably connected with a sliding plate 29. A push block 210 is fixedly connected to one side of the sliding plate 29. The top of the locking block 28 is provided with a slope. When the hexagonal movable block 27 is at the top of the nut body 21, the spring piece 26 extends to make the sliding plate 29 contact the slope of the locking block 28, pushing the rotating block 24 to rotate and disengage from the locking groove provided on the screw 1.

[0026] It should be noted that when valve maintenance is required, the operator pulls the hexagonal movable block 27 and slides it upward on the inner wall of the sliding groove 22 via the sliding block 272, causing the spring piece 26 to disengage from the inside of the receiving groove 273 and be squeezed by the hexagonal movable block body 271. At this time, the spring piece 26 moves downward on the inner wall of the limiting groove 25, pushing the sliding plate 29 to slide on the inner wall of the slide rail 211. At the same time, the sliding plate 29 pushes the pushing block 210 to move. The pushing block 210 contacts the slope on the locking block 28 and moves on the slope, pushing the rotating block 24 to rotate inside the rotating groove 23, causing the locking block 28 to disengage from the inner wall of the locking groove opened on the screw 1. At this time, the operator can use a tool to rotate the hexagonal movable block 27 to drive the nut body 21 to rotate, so that the nut body 21 and the screw 1 make threaded movements until the nut 2 disengages from the screw 1.

[0027] In use, the operator places the nut 2 on top of the screw 1, uses a tool to fasten it to the outer wall of the hexagonal movable block 27, and rotates the hexagonal movable block 27 to drive the nut body 21 to rotate, causing the inner wall of the nut body 21 to make threaded movement with the screw 1. The nut body 21 moves on the screw 1 until it reaches the desired fixed position. The operator can then slide the hexagonal movable block 27 upwards along the inner wall of the sliding groove 22 via the sliding block 272 until the spring piece 26 is engaged in the inner wall of the storage groove 273. At this time, the hexagonal movable block body 271 pushes and squeezes the rotating block 24, causing the rotating block 24 to rotate in the inner wall of the rotating groove 23, driving the locking block 28 to engage in the locking groove set on the screw 1, preventing the nut body 21 from rotating. At the same time, the spring piece 26 prevents the hexagonal movable block 27 from sliding, achieving rapid engagement of the nut 2 and the screw 1. During installation, when valve maintenance is required, the operator pulls the hexagonal movable block 27 and slides it upwards on the inner wall of the sliding groove 22 via the sliding block 272. This causes the spring piece 26 to disengage from the storage groove 273 and be squeezed by the hexagonal movable block body 271. At this time, the spring piece 26 moves downwards and extends on the inner wall of the limiting groove 25, pushing the sliding plate 29 to slide on the inner wall of the slide rail 211. Simultaneously, the sliding plate 29 pushes the pushing block 210 to move. The pushing block 210 contacts the slope on the locking block 28 and moves on the slope, pushing the rotating block 24 to rotate inside the rotating groove 23. This causes the locking block 28 to disengage from the inner wall of the locking groove on the screw 1. At this time, the operator can use a tool to rotate the hexagonal movable block 27 to drive the nut body 21 to rotate, so that the nut body 21 and the screw 1 make threaded movements until the nut 2 disengages from the screw 1.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A valve stem nut for preventing loosening, comprising a screw (1), wherein the screw (1) has six slots, and a nut (2) is provided on the outer wall of the screw (1), wherein the nut (2) comprises a nut body (21), and the inner wall of the nut body (21) is threadedly connected to the screw (1); Its features are: The bottom of the nut body (21) is provided with six rotating grooves (23), and the inner walls of the six rotating grooves (23) are rotatably connected to rotating blocks (24). A locking block (28) is fixedly connected to one side of the six rotating blocks (24), and the six locking blocks (28) are correspondingly engaged with the six locking grooves on the screw (1).

2. The anti-loosening valve stem nut according to claim 1, characterized in that: The nut body (21) has six sliding grooves (22) on its side wall, and a hexagonal movable block (27) is slidably connected to the outer wall of the nut body (21).

3. The anti-loosening valve stem nut according to claim 2, characterized in that: The hexagonal movable block (27) includes a hexagonal movable block body (271), and six sliding blocks (272) are fixedly connected to the inner wall of the hexagonal movable block body (271). The sliding blocks (272) are slidably connected to the inner wall of the sliding groove (22), and six storage slots (273) are opened on the inner wall of the hexagonal movable block body (271).

4. The anti-loosening valve stem nut according to claim 3, characterized in that: The nut body (21) has six limiting grooves (25) on its side wall. The inner wall of the limiting groove (25) is provided with a spring piece (26). When the hexagonal movable block (27) is at the bottom of the nut body (21), the spring piece (26) is engaged with the inner wall of the storage groove (273).

5. The anti-loosening valve stem nut according to claim 4, characterized in that: The inner wall of the limiting groove (25) is provided with a slide rail (211), and a sliding plate (29) is slidably connected to the inner wall of the slide rail (211). A push block (210) is fixedly connected to one side of the sliding plate (29).

6. The anti-loosening valve stem nut according to claim 5, characterized in that: The top of the locking block (28) is provided with a slope. When the hexagonal movable block (27) is on top of the nut body (21), the spring piece (26) extends to make the sliding plate (29) contact the slope of the locking block (28), pushing the rotating block (24) to rotate and disengage from the slot provided on the screw (1).

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