Novel three-piece forged steel double-ball fixed ball valve

Abstract

The utility model discloses a novel three-piece forged steel double-ball fixed ball valve which comprises a valve body, a valve cover is installed on the outer side of the valve body, a ball body is fixed in the valve body, a valve rod is installed above the ball body, a supporting shaft is installed below the ball body, and a stuffing box is arranged on one side of the upper portion of the ball body. According to the novel three-piece type forged steel double-ball fixed ball valve, the valve deck, the ball body, the valve rod, the supporting shaft and the stuffing box are used in cooperation, the ball body is of a supporting shaft structure, the ball body is more stable, good in sealing performance and excellent in zero leakage performance, the ball body is sealed in a soft mode, and meanwhile a fireproof structure is designed; the sealing requirement can be met under the condition that the soft valve seat is burnt out, the sealing requirement can be met under the condition that the valve rod rotates for a long time, the opening torque of the valve rod is small, the valve rod is provided with an anti-rushing-out structure, safety and reliability are achieved, the device is wide in applicable working condition range, long in service life and easy and convenient to disassemble and assemble, and maintenance cost is saved.

Description

Technical Field

[0001] This utility model relates to the technical field of ball valves, specifically a novel three-piece forged steel double-ball fixed ball valve. Background Technology

[0002] A ball valve is a type of valve that controls the flow of fluid by rotating a ball. The opening and closing element of a ball valve is a ball with a circular through hole. The ball is driven by the valve stem and rotates around the axis of the ball valve. When the ball rotates to a specific position, the hole on it aligns with or offsets with the channel of the valve body, thereby realizing the flow of fluid. Ball valves are widely used in industries such as petroleum refining, long-distance pipelines, chemical industry, papermaking, pharmaceutical industry, water conservancy, power, municipal engineering, and steel, and occupy a pivotal position in the national economy.

[0003] The connection between two valves in traditional pipelines is relatively complex, and the valves have poor stability and sealing performance. Therefore, this application provides a novel three-piece forged steel double-ball fixed ball valve to meet the requirements. Utility Model Content

[0004] The purpose of this utility model is to provide a novel three-piece forged steel double-ball fixed ball valve to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a novel three-piece forged steel double-ball fixed ball valve, comprising a valve body, a valve cover installed on the outer side of the valve body, a ball fixed inside the valve body, a valve stem installed above the ball, a support shaft installed below the ball, a stuffing box provided on one side above the ball, a metal valve seat installed below the outer side of the ball, a flexible valve seat provided between the metal valve seat and the ball, a braided packing graphite rope provided between the metal valve seat and the valve cover, a gearbox provided above the valve stem, a flat key installed inside the gearbox, hexagonal socket screws provided on both sides of the valve cover, and a valve seat spring installed below the metal valve seat.

[0006] Preferably, an O-ring and a metal-graphite spiral wound gasket are provided between the valve body and the valve cover, and an O-ring and a metal-graphite spiral wound gasket are provided between the valve body and the support shaft.

[0007] Preferably, an O-ring is provided between the valve body and the stuffing box, and a metal graphite spiral wound gasket is also provided between the valve body and the stuffing box.

[0008] Preferably, the valve stem is connected to the gearbox via a flat key, and the valve stem has a stepped structure design.

[0009] Preferably, an antistatic spring is provided between the ball and the valve stem, and an antistatic ball is provided between the valve stem and the stuffing box.

[0010] Preferably, a bearing one and a thrust washer are provided at the valve stem and stuffing box, and a bearing two is provided between the ball and the support shaft.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This novel three-piece forged steel double-ball fixed ball valve utilizes the cooperation of the valve cover, ball, stem, support shaft, and stuffing box. The ball adopts a support shaft structure, making it more stable and providing excellent sealing performance and zero leakage. The ball seal uses a soft seal and is designed with a fireproof structure, ensuring sealing requirements are met even if the soft valve seat burns out. The stem maintains sealing requirements under long-term rotation and has a low opening torque. The stem also features an anti-blowout structure, ensuring safety and reliability. This device is applicable to a wide range of working conditions, has a long service life, is easy to disassemble and assemble, and saves maintenance costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a side view of the structure of this utility model;

[0015] Figure 3 This is a top view of the structure of this utility model.

[0016] In the diagram: 1. Valve body; 2. Valve cover; 3. Ball; 4. Valve stem; 5. Support shaft; 6. Packing box; 7. Metal valve seat; 8. Flexible valve seat; 9. O-ring one; 10. O-ring two; 11. O-ring three; 12. Braided packing graphite rope; 13. Metal graphite spiral wound gasket one; 14. Metal graphite spiral wound gasket two; 15. Metal graphite spiral wound gasket three; 16. Gearbox; 17. Flat key; 18. Antistatic spring; 19. Hex socket head cap screw; 20. Antistatic ball; 21. Valve seat spring; 22. Bearing one; 23. Thrust washer; 24. Bearing two. Detailed Implementation

[0017] 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.

[0018] Please see Figure 1-3This utility model provides a technical solution: a novel three-piece forged steel double-ball fixed ball valve, comprising a valve body 1, a valve cover 2 installed on the outside of the valve body 1, a ball 3 fixed inside the valve body 1, a valve stem 4 installed above the ball 3, a support shaft 5 installed below the ball 3, a stuffing box 6 provided on one side above the ball 3, a metal valve seat 7 installed below the outside of the ball 3, a flexible valve seat 8 provided between the metal valve seat 7 and the ball 3, an O-ring 9 and a metal graphite spiral wound gasket 13 provided between the valve body 1 and the valve cover 2, and an O-ring 10 and a metal graphite spiral wound gasket 14 provided between the valve body 1 and the support shaft 5. This double-seal design reduces the possibility of external leakage, providing good sealing performance and excellent zero-leakage performance. An O-ring 11 and a metal graphite spiral wound gasket 15 are also provided between the valve body 1 and the stuffing box 6. The valve stem 4 meets the sealing requirements under long-term rotation. A braided packing graphite rope 12 is installed between the cover 2 and the valve stem 4. A gearbox 16 is installed above the valve stem 4. A flat key 17 is installed inside the gearbox 16. The valve stem 4 is connected to the gearbox 16 through the flat key 17. The valve stem 4 has a stepped structure design. Under the positioning of the packing box 6, the valve stem 4 has an anti-push-out structure, which is safe and reliable. Both sides of the valve cover 2 are provided with internal hexagon screws 19. An anti-static spring 18 is provided between the ball 3 and the valve stem 4. An anti-static ball 20 is provided between the valve stem 4 and the packing box 6 to prevent static electricity from igniting flammable media and ensure safe operation under special working conditions. A valve seat spring 21 is installed below the metal valve seat 7. A bearing 22 and a thrust washer 23 are provided between the valve stem 4 and the packing box 6. A bearing 24 is provided between the ball 3 and the support shaft 5 to reduce the friction torque of the valve stem 4, so that the valve stem 4 can operate smoothly and flexibly for a long time, operate with pure torque, and improve the service life of the valve.

[0019] Working principle: When using this new type of three-piece forged steel double-ball fixed ball valve, the ball 3 adopts the support shaft 5 structure, which makes the ball 3 more stable, with good sealing performance and excellent zero leakage performance. The ball 3 seal adopts a soft seal and is designed with a fireproof structure, which can still meet the sealing requirements even if the soft valve seat 8 is burned. The valve stem 4 meets the sealing requirements under long-term rotation, and the valve stem 4 has a small opening torque. The valve stem 4 also has an anti-blowout structure, which is safe and reliable. In this way, the use process of this new type of three-piece forged steel double-ball fixed ball valve is completed.

[0020] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0021] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A novel three-piece forged steel double-ball fixed ball valve, comprising a valve body (1), characterized in that: A valve cover (2) is installed on the outside of the valve body (1). A ball (3) is fixed inside the valve body (1). A valve stem (4) is installed above the ball (3). A support shaft (5) is installed below the ball (3). A stuffing box (6) is provided on one side above the ball (3). A metal valve seat (7) is installed below the outside of the ball (3). A soft valve seat (8) is provided between the metal valve seat (7) and the ball (3). A braided packing graphite rope (12) is provided between the metal valve seat (7) and the valve cover (2). A gearbox (16) is provided above the valve stem (4). A flat key (17) is installed inside the gearbox (16). Hexagon socket screws (19) are provided on both sides of the valve cover (2). A valve seat spring (21) is installed below the metal valve seat (7).

2. The novel three-piece forged steel double-ball fixed ball valve according to claim 1, characterized in that, An O-ring (9) and a metal graphite spiral wound gasket (13) are provided between the valve body (1) and the valve cover (2), and an O-ring (10) and a metal graphite spiral wound gasket (14) are provided between the valve body (1) and the support shaft (5).

3. A novel three-piece forged steel double-ball fixed ball valve according to claim 1, characterized in that, An O-ring (11) is provided between the valve body (1) and the stuffing box (6), and a metal graphite spiral wound gasket (15) is also provided between the valve body (1) and the stuffing box (6).

4. A novel three-piece forged steel double-ball fixed ball valve according to claim 1, characterized in that, The valve stem (4) is connected to the gearbox (16) via a flat key (17), and the valve stem (4) has a stepped structure design.

5. A novel three-piece forged steel double-ball fixed ball valve according to claim 1, characterized in that, An antistatic spring (18) is provided between the ball (3) and the valve stem (4), and an antistatic ball (20) is provided between the valve stem (4) and the packing box (6).

6. A novel three-piece forged steel double-ball fixed ball valve according to claim 1, characterized in that, A bearing (22) and a thrust washer (23) are provided at the valve stem (4) and the stuffing box (6), and a bearing (24) is provided between the ball (3) and the support shaft (5).

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