Valve rod nut convenient to lubricate

Abstract

The utility model relates to the technical field of valve rod nuts, and discloses a valve rod nut convenient to lubricate, which comprises an upper nut body, a lower nut body is arranged at the bottom end of the upper nut body, threaded sleeves are arranged on the inner walls of the upper nut body and the lower nut body, and oil storage cavities are formed in the inner walls of the threaded sleeves. An oil outlet hole is formed in the end, opposite to the inner side of the oil storage cavity, of the threaded sleeve, connecting cylinders are fixedly connected to the left and right ends of the threaded sleeve, and pressing plates are slidably connected to the inner walls of the connecting cylinders. According to the utility model, by pressing the pressing block, the inner cavity of the hollow connecting pipe can squeeze lubricating oil on the inner wall of the connecting cylinder into the oil outlet through the oil storage cavity, and the lubricating oil is smeared on the inner wall of the threaded sleeve through the oil outlet, so that the valve rod is lubricated, the friction between the valve rod and the threaded sleeve is reduced, and the rotation flexibility of the valve rod is improved; the phenomenon of unsmooth rotation or jamming caused by increased friction between the valve rod nut and the valve rod is avoided, and the service life of the valve is prolonged.

Description

Technical Field

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

[0002] The valve stem nut is an important component of a valve. It is usually installed at the end of the valve stem and is used to regulate and control the opening and closing of the valve. The main function of the valve stem nut is to connect the valve stem to the actuator (such as a handwheel, gear, motor, etc.) and drive the valve stem to move up and down by rotation, thereby realizing the opening and closing of the valve.

[0003] According to the announcement number CN213575852U, the valve stem nut and valve cover assembly structure for a gate valve includes a valve cover. An annular structure is integrally formed on the top of the valve cover. The annular structure is hollow inside for inserting a valve stem. A convex ring is formed inward from the bottom of the inner edge of the annular structure. The upper end face of the convex ring and the inner edge of the annular structure form an opening groove. A valve stem nut is embedded in the groove. The valve stem nut is fixed in the groove by an upper cover. A through hole is formed in the middle of the upper cover. In the assembled state, the upper end of the valve stem nut protrudes from the through hole formed in the upper cover for installation with a handwheel.

[0004] Based on the aforementioned patent, by modifying the existing annular structure above the valve cover, a convex ring is created on its inner edge, forming a columnar groove inside. During use, it is fitted with a corresponding valve stem nut, replacing the traditional structure where the lower end inserts and the upper end is fixed. This eliminates the influence of the handwheel and its own weight during rotation, resulting in greater flexibility. The valve stem nut is secured using a hexagonal thread and annular structure, effectively preventing it from coming off and allowing adjustment of the gap between the bottom of the hexagonal thread and the upper surface of the convex ring, ensuring smooth rotation. However, this solution still has shortcomings in lubrication, especially after prolonged use, as increased friction between the valve stem nut and the valve stem can easily lead to poor rotation or jamming, affecting the normal use and lifespan of the valve.

[0005] In response to this technical problem, this application proposes a valve stem nut that is easy to lubricate. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a valve stem nut that facilitates lubrication. By pressing the actuating block, the hollow cavity inside the connecting tube can squeeze the lubricating oil from the inner wall of the connecting sleeve through the oil storage chamber into the oil outlet. The oil outlet then coats the inner wall of the threaded sleeve with the lubricating oil, thereby lubricating the valve stem, reducing friction between the valve stem and the threaded sleeve, improving the flexibility of valve stem rotation, and preventing the valve stem nut from becoming difficult to rotate or jamming due to increased friction with the valve stem stem, thus extending the service life of the valve.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A valve stem nut that is easy to lubricate includes an upper nut body, a lower nut body at the bottom of the upper nut body, a threaded sleeve on the inner wall of the upper nut body and the lower nut body, an oil storage cavity in the inner wall of the threaded sleeve, an oil outlet hole in one end of the threaded sleeve relative to the inner side of the oil storage cavity, and connecting cylinders fixedly connected to the left and right ends of the threaded sleeve.

[0009] Furthermore, a pressure plate is slidably connected to the inner wall of the connecting cylinder, a hollow connecting pipe is fixedly connected to the inner wall of the pressure plate, a pressing block is fixedly connected to the outer wall of the right end of the hollow connecting pipe, and the pressure plate and the inner wall of the connecting cylinder are connected by a tension spring.

[0010] Furthermore, the oil storage cavity is connected to the inner wall of the connecting cylinder.

[0011] Furthermore, one end of the tension spring is connected to the pressure plate, and the other end of the tension spring is connected to the inner wall of the connecting cylinder.

[0012] Furthermore, the hollow connecting pipe has a cavity in its inner wall, and a sealing plug is provided at the right end of the hollow connecting pipe.

[0013] Furthermore, the cavity inside the hollow connecting pipe is connected to the inner wall of the connecting cylinder.

[0014] Furthermore, an upper connecting ring is fixedly connected to the outer wall of the bottom end of the upper nut body, and a lower connecting ring is fixedly connected to the outer wall of the top end of the lower nut body.

[0015] Furthermore, the upper connecting ring and the lower connecting ring are connected by bolts.

[0016] This utility model has the following beneficial effects:

[0017] 1. In this utility model, by pressing the actuating block, the lubricating oil inside the hollow connecting pipe can be squeezed from the inner wall of the connecting cylinder into the oil outlet through the oil storage chamber. The oil outlet applies the lubricating oil to the inner wall of the threaded sleeve, thereby lubricating the valve stem, reducing the friction between the valve stem and the threaded sleeve, improving the flexibility of valve stem rotation, avoiding the phenomenon of poor rotation or jamming caused by increased friction between the valve stem nut and the valve stem, and extending the service life of the valve.

[0018] 2. In this utility model, the upper nut body and the lower nut body are connected by an upper connecting ring, a lower connecting ring, and bolts, which allows for quick disassembly and replacement of damaged threaded sleeves, improving the convenience of maintenance and reducing maintenance costs. Attached Figure Description

[0019] Figure 1 This is a perspective view of a valve stem nut that is easy to lubricate, as proposed in this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of a threaded sleeve in a valve stem nut that facilitates lubrication, as proposed in this utility model.

[0021] Figure 3 This is a schematic diagram of the structure of the pressure plate in a valve stem nut that is easy to lubricate, as proposed in this utility model.

[0022] Figure 4 This is a schematic diagram of the sealing plug in a valve stem nut that is easy to lubricate, as proposed in this utility model.

[0023] Legend:

[0024] 1. Upper nut body; 2. Lower nut body; 3. Threaded sleeve; 4. Oil reservoir; 5. Oil outlet; 6. Connecting cylinder; 7. Pressure plate; 8. Hollow connecting pipe; 9. Press block; 10. Tension spring; 11. Sealing plug; 12. Upper connecting ring; 13. Lower connecting ring; 14. Bolt. Detailed Implementation

[0025] 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.

[0026] Reference Figure 1 , Figure 3 and Figure 4 An embodiment of this utility model provides a valve stem nut that is easy to lubricate, including an upper nut body 1, a lower nut body 2 at the bottom of the upper nut body 1, a threaded sleeve 3 on the inner wall of the upper nut body 1 and the lower nut body 2, an oil storage cavity 4 on the inner wall of the threaded sleeve 3, an oil outlet hole 5 at one end of the threaded sleeve 3 relative to the inner side of the oil storage cavity 4, a connecting cylinder 6 fixedly connected to the left and right ends of the threaded sleeve 3, a pressure plate 7 slidably connected to the inner wall of the connecting cylinder 6, a hollow connecting pipe 8 fixedly connected to the inner wall of the pressure plate 7, a pressing block 9 fixedly connected to the outer wall of the right end of the hollow connecting pipe 8, the pressure plate 7 and the inner wall of the connecting cylinder 6 connected by a tension spring 10, the oil storage cavity 4 communicating with the inner wall of the connecting cylinder 6, one end of the tension spring 10 connected to the pressure plate 7, the other end of the tension spring 10 connected to the inner wall of the connecting cylinder 6, a cavity on the inner wall of the hollow connecting pipe 8, a sealing plug 11 at the right end of the hollow connecting pipe 8, and the cavity inside the hollow connecting pipe 8 communicating with the inner wall of the connecting cylinder 6;

[0027] Specifically, during operation, when the valve stem passes through the threaded sleeve 3 and needs to rotate, the operator can manually press the actuating block 9. When the actuating block 9 is pressed, it causes the hollow connecting pipe 8 and the pressure plate 7 to slide on the inner wall of the connecting cylinder 6, simultaneously stretching the tension spring 10. At this time, the inner cavity of the hollow connecting pipe 8 will squeeze the lubricating oil on the inner wall of the connecting cylinder 6 through the oil storage chamber 4 to the oil outlet 5. The oil outlet 5 applies lubricating oil to the inner wall of the threaded sleeve 3, thereby lubricating the valve stem, reducing friction between the valve stem and the threaded sleeve 3, and improving the flexibility of valve stem rotation. When the actuating block 9 is released, the elastic force of the tension spring 10 will pull the pressure plate 7 and the hollow connecting pipe 8 back to their original positions, and the sealing plug 11 will seal the right end of the hollow connecting pipe 8 to prevent lubricating oil leakage. Furthermore, lubricating oil can be added to the oil storage chamber 4 by opening the sealing plug 11. This device can effectively lubricate the valve stem, improve its rotational flexibility, and avoid the phenomenon of poor rotation or jamming caused by increased friction between the valve stem nut and the valve stem, thereby extending the service life of the valve.

[0028] Reference Figure 1 and Figure 2 The upper nut body 1 has an upper connecting ring 12 fixedly connected to the outer wall of the bottom end, and the lower nut body 2 has a lower connecting ring 13 fixedly connected to the outer wall of the top end. The upper connecting ring 12 and the lower connecting ring 13 are connected by bolts 14.

[0029] Specifically, by cooperating with the upper nut body 1 and the lower nut body 2, as well as the upper connecting ring 12 and the lower connecting ring 13, and then connecting them with bolts 14, quick disassembly and assembly are achieved. This not only facilitates the rapid replacement of damaged threaded sleeves 3, but also significantly improves the convenience of maintenance and effectively reduces maintenance costs.

[0030] Working principle: During use, when the valve stem needs to rotate inside the threaded sleeve 3, the operator can manually press the actuating block 9. The actuating block 9, under force, causes the hollow connecting pipe 8 and the pressure plate 7 to slide on the inner wall of the connecting cylinder 6, while simultaneously stretching the tension spring 10. At this time, the cavity inside the hollow connecting pipe 8 can squeeze the lubricating oil on the inner wall of the connecting cylinder 6 through the oil storage cavity 4 into the oil outlet 5. The oil outlet 5 then coats the inner wall of the threaded sleeve 3 with lubricating oil, thereby lubricating the valve stem and reducing the friction between the valve stem and the threaded sleeve 3. This device improves the flexibility of valve stem rotation. When the push block 9 is released, the elastic force of the tension spring 10 pulls the pressure plate 7 and the hollow connecting pipe 8 back to their original positions. The sealing plug 11 can seal the right end of the hollow connecting pipe 8 to prevent lubricating oil leakage. Furthermore, by opening the sealing plug 11, lubricating oil can be added to the oil storage chamber 4. This device can effectively lubricate the valve stem, improve the flexibility of valve stem rotation, avoid the phenomenon of poor rotation or jamming caused by increased friction between the valve stem nut and the valve stem, and extend the service life of the valve.

[0031] In addition, the upper nut body 1 and the lower nut body 2 are connected by the upper connecting ring 12, the lower connecting ring 13 and the bolt 14, which allows for quick disassembly and replacement of the damaged threaded sleeve 3, improving the convenience of maintenance and reducing maintenance costs.

[0032] 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 for ease of lubrication comprising an upper nut body (1) characterised in that: The lower nut body (2) is provided at the bottom of the upper nut body (1). The inner walls of the upper nut body (1) and the lower nut body (2) are provided with threaded sleeves (3). The inner wall of the threaded sleeve (3) is provided with an oil storage cavity (4). The threaded sleeve (3) is provided with an oil outlet hole (5) at one end relative to the inner side of the oil storage cavity (4). The left and right ends of the threaded sleeve (3) are fixedly connected with connecting cylinders (6).

2. A valve stem nut for facilitating lubrication as defined in claim 1, wherein: The inner wall of the connecting cylinder (6) is slidably connected to a pressure plate (7), the inner wall of the pressure plate (7) is fixedly connected to a hollow connecting pipe (8), the outer wall of the right end of the hollow connecting pipe (8) is fixedly connected to a push block (9), and the pressure plate (7) and the inner wall of the connecting cylinder (6) are connected by a tension spring (10).

3. A valve stem nut for facilitating lubrication as defined in claim 1, wherein: The oil storage chamber (4) is connected to the inner wall of the connecting cylinder (6).

4. A valve stem nut for facilitating lubrication as defined in claim 2 wherein: One end of the tension spring (10) is connected to the pressure plate (7), and the other end of the tension spring (10) is connected to the inner wall of the connecting cylinder (6).

5. A valve stem nut for facilitating lubrication as defined in claim 2 wherein: The hollow connecting pipe (8) has a cavity in its inner wall and a sealing plug (11) is provided at the right end of the hollow connecting pipe (8).

6. A valve stem nut for facilitating lubrication as defined in claim 5, wherein: The hollow cavity of the hollow connecting pipe (8) is connected to the inner wall of the connecting cylinder (6).

7. A valve stem nut for facilitating lubrication as defined in claim 1, wherein: The upper nut body (1) has an upper connecting ring (12) fixedly connected to the outer wall at the bottom end, and the lower nut body (2) has a lower connecting ring (13) fixedly connected to the outer wall at the top end.

8. A valve stem nut for facilitating lubrication as defined in claim 7, wherein: The upper connecting ring (12) and the lower connecting ring (13) are connected by bolts (14).

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