Die forging and steel forging two-piece type fixed ball valve

Abstract

The utility model discloses a die forging and steel forging two-piece type 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 installed in the valve body, a valve rod is installed above the ball body, and a supporting shaft is installed below the ball body. According to the die forging and steel forging two-piece type fixed ball valve, the valve rod, the supporting shaft, the stuffing box, the top flange, the metal valve seat and the soft valve seat are used in cooperation, the valve rod designed in a stepped structure is positioned by the stuffing box, so that the product completely meets the safety design requirement for preventing the valve rod from being blown out, and the stress of the metal valve seat is more uniform than that of a traditional design; the soft valve seat is made of high-performance DEVLON materials, has good elastic compensation performance and is attached to the surface of the ball body in a sealed mode, so that the soft valve seat has reliable, stable and efficient sealing performance, meanwhile, sealing can still be guaranteed when the surface of the ball body is slightly damaged, the device is easy and convenient to disassemble and assemble, and maintenance cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of valve-related technology, specifically a two-piece fixed ball valve made of forged steel. Background Technology

[0002] Existing ball valves suffer from poor sealing performance and are difficult to disassemble and assemble. Therefore, this application provides a two-piece fixed ball valve made of forged steel to meet the requirements. Utility Model Content

[0003] The purpose of this invention is to provide a two-piece fixed ball valve made of forged steel to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a two-piece fixed ball valve made of forged steel, comprising a valve body, a valve cover installed on the outer side of the valve body, a ball installed inside the valve body, a valve stem installed above the ball, a support shaft installed below the ball, a stuffing box installed above the valve body, a top flange installed above the stuffing box, a metal valve seat installed below the ball, a flexible valve seat provided above the metal valve seat, and a valve seat spring and graphite packing installed on the outer side of the metal valve seat.

[0005] Preferably, the valve stem has a stepped structure and is positioned by a stuffing box.

[0006] Preferably, the flexible valve seat is made of high-performance DEVLON material, and the flexible valve seat is in close contact and sealed with the surface of the ball.

[0007] Preferably, an O-ring one is provided on the inner side of the valve cover, and an O-ring two is provided on the inner side of the metal valve seat.

[0008] Preferably, an O-ring three is provided on the outer side of the stuffing box, and an O-ring four is provided on the outer side of the valve stem.

[0009] Preferably, an oil injection valve is installed on one side of the valve stem, and a first grease injection valve and a second grease injection valve are respectively installed on the outer side of the metal valve seat.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. This two-piece fixed ball valve made of forged steel utilizes a combination of a valve stem, support shaft, stuffing box, top flange, metal valve seat, and soft valve seat. The stepped design of the valve stem, positioned by the stuffing box, ensures that the product fully meets the safety design requirements for preventing valve stem blowout. The metal valve seat experiences more uniform force than traditional designs, thereby reducing the overall torque of the valve body. The soft valve seat is made of high-performance DEVLON material, which has excellent elasticity and compensating properties. It fits snugly against the ball surface for a seal, thus providing reliable, stable, and efficient sealing performance. Furthermore, it can still ensure a seal even with minor damage to the ball surface. The device is easy to assemble and disassemble, saving maintenance costs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the oil injection valve of this utility model.

[0014] In the diagram: 1. Valve body; 2. Valve cover; 3. Ball; 4. Valve stem; 5. Support shaft; 6. Packing box; 7. Top flange; 8. Metal valve seat; 9. Flexible valve seat; 10. O-ring one; 11. O-ring two; 12. O-ring three; 13. O-ring four; 14. Oil injection valve; 15. First grease injection valve; 16. Second grease injection valve; 17. Valve seat spring; 18. Graphite packing. Detailed Implementation

[0015] 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.

[0016] Please see Figure 1-2This utility model provides a technical solution: a two-piece fixed ball valve made of forged steel, including a valve body 1, a valve cover 2 installed on the outside of the valve body 1, a ball 3 installed inside the valve body 1, a valve stem 4 installed above the ball 3, the valve stem 4 having a stepped structure, the valve stem 4 being positioned by a stuffing box 6, the stepped structure of the valve stem 4, under the positioning of the stuffing box 6, ensures that the product fully meets the safety design requirements for preventing the valve stem 4 from being blown out, a support shaft 5 installed below the ball 3, a stuffing box 6 installed above the valve body 1, a top flange 7 installed above the stuffing box 6, a metal valve seat 8 installed below the ball 3, and a flexible valve seat 9 installed above the metal valve seat 8, the flexible valve seat 9 being made of high-performance DEVLON material, the flexible valve seat 9 being in close contact and sealing with the surface of the ball 3, the flexible valve seat 9... The material is high-performance DEVLON material, which has excellent elasticity and can be tightly sealed to the surface of the ball 3, thus providing reliable, stable, and efficient sealing performance. An O-ring 10 is installed on the inner side of the valve cover 2, and an O-ring 21 is installed on the inner side of the metal valve seat 8, making the valve body 1 more reliably sealed. An O-ring 32 is installed on the outer side of the stuffing box 6, and an O-ring 43 is installed on the outer side of the valve stem 4, further ensuring the sealing effect. An oil injection valve 14 is installed on one side of the valve stem 4, and a first grease injection valve 15 and a second grease injection valve 16 are installed on the outer side of the metal valve seat 8, for temporary sealing in emergency situations, ensuring safety while buying time for subsequent work. A valve seat spring 17 and a graphite packing 18 are installed on the outer side of the metal valve seat 8.

[0017] Working principle: When using this die-forged steel two-piece fixed ball valve, the stepped structure design of the valve stem 4, under the positioning of the stuffing box 6, ensures that the product fully meets the safety design requirements for preventing the valve stem 4 from being blown out. The metal valve seat 8 experiences more uniform force than the traditional design, thereby reducing the overall torque of the valve body 1. At the same time, the metal valve seat 8 adopts a valve seat spring 17 compensation structure, which provides the initial pre-tight sealing pressure. In the event of a fire, after the soft valve seat 9 and O-ring 11 fail, the valve seat spring 17 pushes the metal valve seat 8 to fit against the ball 3, and the graphite packing 18 achieves a sealing effect, preventing media leakage. This completes the operation of the die-forged steel two-piece fixed ball valve.

[0018] 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.

[0019] 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 two-piece fixed ball valve made of forged steel, 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 installed 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 installed above the valve body (1), a top flange (7) is installed above the stuffing box (6), a metal valve seat (8) is installed below the ball (3), a soft valve seat (9) is provided above the metal valve seat (8), and a valve seat spring (17) and a graphite packing (18) are installed on the outside of the metal valve seat (8).

2. The two-piece fixed ball valve made of forged steel according to claim 1, characterized in that, The valve stem (4) is a stepped structure and is positioned by a stuffing box (6).

3. The two-piece fixed ball valve made of forged steel according to claim 1, characterized in that, The soft valve seat (9) is made of high-performance DEVLON material, and the soft valve seat (9) is in contact with and sealed to the surface of the ball (3).

4. The two-piece fixed ball valve made of forged steel according to claim 1, characterized in that, The valve cover (2) is provided with an O-ring one (10) on the inner side, and the metal valve seat (8) is provided with an O-ring two (11) on the inner side.

5. A two-piece fixed ball valve made of forged steel according to claim 1, characterized in that, The outer side of the stuffing box (6) is provided with O-ring three (12), and the outer side of the valve stem (4) is provided with O-ring four (13).

6. A two-piece fixed ball valve made of forged steel according to claim 1, characterized in that, An oil injection valve (14) is installed on one side of the valve stem (4), and a first grease injection valve (15) and a second grease injection valve (16) are respectively installed on the outside of the metal valve seat (8).

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