Anti-static ball valve

Abstract

The utility model provides a kind of anti-static ball valve, it is related to the technical field of ball valve, including bottom cover, bottom cover top is fixedly provided with valve body by screw, the side of valve body is provided with valve cover, and it is fixedly connected between valve body and valve cover by full thread stud bolt and hexagon head nut, and the inside of valve body is provided with sphere, and it is provided with sealing ring between sphere and valve body, and the top of sphere is fixedly connected with valve rod, and the upper portion of valve rod passes through the top of valve body, and the top of valve body is provided with packing gland, and packing gland is fixedly connected with valve body by internal hexagonal cylindrical screw, and the upper portion of valve rod passes through packing gland, and it is provided with anti-static device between valve rod and packing gland, and anti-static device is used to make contact connection between valve rod and packing gland. Its simple structure changes the structure and position of existing antistatic assembly, avoids the contact between anti-static device and conveying medium, is not easy to be corroded, and reduces the number of parts of antistatic assembly, reduces the processing difficulty, improves the stability and durability of electrostatic protection function.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, and in particular to an anti-static ball valve. Background Technology

[0002] During operation, existing ball valves are prone to static electricity generation due to friction between the ball (metal component) and the plastic seal inside the valve seat. This static electricity can pose a safety risk, especially when conveying flammable and explosive media such as gases and oils. The ball and valve stem are connected by a connector, and the valve stem also accumulates static electricity. To eliminate this static electricity, an anti-static component is usually installed between the valve stem and the valve body to conduct the static electricity into the valve body and release it to the outside through a grounding device, thereby reducing the harm of static electricity to the system. However, the anti-static component installed between the valve stem and the valve body is prone to contact with the conveyed medium. If the conveyed medium is corrosive, the anti-static component may be corroded and damaged, resulting in a reduction or even failure of its anti-static function. In this case, the static electricity cannot be effectively conducted into the valve body and grounded, which may increase the risk of static electricity accumulation and thus endanger safety. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies. Existing ball valves have an antistatic component between the valve body and the valve stem. This antistatic component is prone to contact with the conveying medium. When the conveying medium is corrosive, the antistatic component may be corroded and damaged, leading to a reduction or even failure of its antistatic function. The antistatic ball valve provided by this invention has a simple structure, changes the structure and position of the existing antistatic component, avoids its contact with the conveying medium, is not easily corroded, and reduces the number of parts in the antistatic component, thereby reducing the processing difficulty and improving its service life.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an anti-static ball valve, comprising a bottom cover, a valve body fixedly mounted on the top of the bottom cover by screws, a valve cover mounted on one side of the valve body, the valve body and the valve cover being fixedly connected by a fully threaded stud and a hexagonal head nut, a ball disposed inside the valve body, a sealing ring disposed between the ball and the valve body, a valve stem fixedly connected to the top of the ball, the upper part of the valve stem passing through the top of the valve body, a packing gland disposed on the top of the valve body, the packing gland being fixedly connected to the valve body by an internal hexagonal head screw, the upper part of the valve stem passing through the packing gland, and an anti-static device disposed between the valve stem and the packing gland, the anti-static device being used to ensure contact connection between the valve stem and the packing gland.

[0005] In a preferred embodiment, the antistatic device is a metal sheet with protrusions on both sides.

[0006] In a preferred embodiment, the inner wall of the packing gland is provided with a groove, and the antistatic device is placed in the groove.

[0007] In a preferred embodiment, packing is provided between the valve stem and the valve body at the lower part of the packing gland.

[0008] In a preferred embodiment, a center sealing gasket is provided between the valve body and the valve cover.

[0009] In a preferred embodiment, an anti-flying nut is provided between the lower part of the valve stem and the valve body.

[0010] In a preferred embodiment, a positioning block is provided on the top of the packing gland, and the positioning block is sleeved on the valve stem.

[0011] In a preferred embodiment, a wrench is fixedly connected to the top of the valve stem by a hexagonal head bolt.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] This invention utilizes an anti-static device embedded between the packing gland and the valve stem to conduct electricity, connecting the packing gland and the valve stem. Static electricity generated between the ball and the sealing ring is conducted to the valve stem, then through the packing gland to the valve body, and finally discharged through a grounding device connected to the valve body. This effectively prevents static electricity buildup inside the ball valve, reducing safety hazards caused by static electricity. The anti-static device, embedded within the packing gland, avoids direct contact with corrosive transport media, preventing it from failing due to corrosion. This enhances the stability and durability of the static protection function, avoiding potential fire or explosion risks caused by static electricity accumulation, especially during the transport of hazardous media such as gases or oils. It protects not only the equipment itself but also external environmental hazards. The anti-static device design improves the durability and safety of the ball valve, extending its service life. This function is particularly important for systems operating for extended periods. Compared to existing anti-static components, this design reduces the number of parts, lowers processing difficulty, and increases service life. Attached Figure Description

[0014] Figure 1 This utility model provides a structural schematic diagram of an antistatic ball valve;

[0015] Figure 2 This utility model provides a schematic diagram of the antistatic device structure for an antistatic ball valve.

[0016] Legend:

[0017] 1. Bottom cover; 2. Valve body; 3. Valve cover; 4. Hex head nut; 5. Fully threaded stud; 6. Center sealing gasket; 7. Ball; 8. Sealing ring; 9. Valve stem; 10. Anti-fly nut; 11. Packing; 12. Packing gland; 13. Anti-static device; 14. Locating block; 15. Hex head bolt; 16. Wrench; 17. Socket head cap screw. Detailed Implementation

[0018] 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.

[0019] Example

[0020] like Figure 1-2 As shown, this utility model provides a technical solution: an antistatic ball valve, including a bottom cover 1, a valve body 2 fixedly mounted on the top of the bottom cover 1 by screws, a valve cover 3 mounted on one side of the valve body 2, the valve body 2 and the valve cover 3 being fixedly connected by a fully threaded stud 5 and a hexagonal head nut 4, a ball 7 disposed inside the valve body 2, a sealing ring 8 disposed between the ball 7 and the valve body 2, a valve stem 9 fixedly connected to the top of the ball 7, the upper part of the valve stem 9 passing through the top of the valve body 2, a packing gland 12 disposed on the top of the valve body 2, the packing gland 12 being fixedly connected to the valve body 2 by an internal hexagonal head screw 17, the upper part of the valve stem 9 passing through the packing gland 12, and an antistatic device 13 disposed between the valve stem 9 and the packing gland 12, the antistatic device 13 being used to make contact connection between the valve stem 9 and the packing gland 12.

[0021] Working Principle: During the opening and closing of the ball valve, the ball 7 rotates, and friction with the sealing ring 8 easily generates static electricity. Since the valve stem 9, ball 7, etc., do not directly contact the valve body 2, valve cover 3, etc., static electricity accumulates on the valve stem 9, ball 7, and other components inside the ball valve and cannot be effectively discharged. Existing antistatic components are generally placed between the valve stem 9 and the valve body 2, using a compression spring and contact ball structure to ensure contact between the valve stem 9 and the valve body 2, thereby discharging static electricity to the valve body 2, and then discharging it through the grounding device on the valve body 2 to achieve the antistatic effect. However, the antistatic component between the valve stem 9 and the valve body 2 is prone to contact with the conveying medium. When the conveying medium is corrosive, it is easy for the antistatic component to be corroded and fail, causing potential danger. In contrast, the antistatic component 13 of this utility model is located between the packing gland 12 and the valve stem 9, isolating the antistatic component 13 from contact with the conveying medium and avoiding its failure due to corrosion by the conveying medium. When static electricity is generated on the ball 7, it is conducted to the valve stem 9. The valve stem 9 is connected to the packing gland 12 through the anti-static device 13, and then the static electricity is conducted to the packing gland 12. The packing gland 12 is connected to the valve body 2 through the internal hexagonal head screw 17, and then the static electricity is conducted to the valve body 2. Finally, the static electricity is discharged through the grounding device connected to the valve body 2, effectively preventing the accumulation of static electricity in the ball valve.

[0022] In one embodiment, the antistatic device 13 is a metal sheet with protrusions on both sides. The metal sheet is embedded between the packing gland 12 and the valve stem 9, making the packing gland 12 and the valve stem 9 in contact and connecting, thus conducting static electricity. The protrusions on both sides of the metal sheet ensure that both sides can effectively contact the packing gland 12 and the valve stem 9 respectively, guaranteeing good contact performance. The ball 7, valve stem 9, packing gland 12, hexagon socket head cap screw 17, and valve body 2 are all made of conductive metal.

[0023] In one embodiment, the inner wall of the packing gland 12 is provided with a groove, and the antistatic device 13 is placed in the groove. This confines the antistatic device 13 within the groove, preventing it from slipping out, ensuring its contact performance, and reducing the chance of contact with external corrosive substances, further ensuring its safe use.

[0024] A packing 10 is provided between the valve stem 9 at the lower part of the packing gland 12 and the valve body 2. A center sealing gasket 6 is provided between the valve body 2 and the valve cover 3.

[0025] In one embodiment, an anti-flying nut is provided between the lower part of the valve stem 9 and the valve body 2. A positioning block 14 is provided on the top of the packing gland 12, and the positioning block 14 is sleeved on the valve stem 9. A wrench 16 is fixedly connected to the top of the valve stem 9 by a hexagonal head bolt 15.

[0026] This invention utilizes an anti-static device 13 embedded between the packing gland 12 and the valve stem 9 to conduct electricity, connecting the packing gland 12 and the valve stem 9. This allows static electricity generated between the ball 7 and the sealing ring 8 to be conducted to the valve stem 9, then through the packing gland 12 to the valve body 2, and finally discharged through a grounding device connected to the valve body 2. This effectively prevents static electricity from accumulating inside the ball valve, thus reducing safety hazards caused by static electricity. The anti-static device 13, embedded within the packing gland 12, avoids direct contact with corrosive transport media, preventing it from failing due to corrosion. This enhances the stability and durability of the static protection function, avoiding potential fire or explosion risks caused by static electricity accumulation, especially during the transport of hazardous media such as gases or oils. It not only protects the equipment itself but also avoids external environmental hazards. The design of the anti-static device 13 improves the durability and safety of the ball valve, extending its service life. This function is particularly important for systems operating for extended periods. Furthermore, compared to existing anti-static components, this design reduces the number of parts, lowers processing difficulty, and increases service life.

[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An antistatic ball valve, comprising a bottom cover (1), characterized in that: A valve body (2) is fixedly mounted on the top of the bottom cover (1) by screws. A valve cover (3) is mounted on one side of the valve body (2). The valve body (2) and the valve cover (3) are fixedly connected by a fully threaded stud (5) and a hexagonal head nut (4). A ball (7) is provided inside the valve body (2). A sealing ring (8) is provided between the ball (7) and the valve body (2). A valve stem (9) is fixedly connected to the top of the ball (7). The upper part of the valve stem (9) passes through the top of the valve body (2). The valve body (2) is provided with a packing gland (12) on the top. The packing gland (12) is fixedly connected to the valve body (2) by an internal hexagonal cylindrical screw (17). The upper part of the valve stem (9) passes through the packing gland (12). An anti-static device (13) is provided between the valve stem (9) and the packing gland (12). The anti-static device (13) is used to make the valve stem (9) and the packing gland (12) make contact connection. The anti-static device (13) is a metal sheet with protrusions on both sides.

2. The antistatic ball valve according to claim 1, characterized in that: The inner wall of the packing gland (12) is provided with a groove, and the antistatic device (13) is placed in the groove.

3. The antistatic ball valve according to claim 1, characterized in that: A packing material (10) is provided between the valve stem (9) at the bottom of the packing gland (12) and the valve body (2).

4. The antistatic ball valve according to claim 1, characterized in that: A central sealing gasket (6) is provided between the valve body (2) and the valve cover (3).

5. The antistatic ball valve according to claim 1, characterized in that: An anti-flying nut is provided between the lower part of the valve stem (9) and the valve body (2).

6. The antistatic ball valve according to claim 1, characterized in that: The top of the packing gland (12) is provided with a positioning block (14), which is sleeved on the valve stem (9).

7. The antistatic ball valve according to claim 1, characterized in that: A wrench (16) is fixedly connected to the top of the valve stem (9) by a hexagonal head bolt (15).

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