High-performance floating type soft sealing ball valve

Abstract

The utility model discloses a high-performance floating type soft sealing ball valve which comprises a valve body, the right side of the valve body is connected with a valve side body through a nut, a valve body sealing gasket is arranged between the valve body and the valve side body, a mounting seat is arranged on the upper side of the valve body, a valve rod is rotationally connected in the mounting seat, a ball body is rotationally connected in the valve body, and a valve rod is arranged in the ball body. A groove is formed in the upper side of the ball body, the lower end of the valve rod is embedded into the connecting groove, a valve seat sealing gasket is arranged at the connecting position of the ball body, the valve body and the valve side body, the valve rod is sequentially provided with a thrust gasket and an O-shaped ring from bottom to top, the thrust gasket is fixedly connected with the valve rod, the O-shaped ring is connected with the valve rod in a sleeved mode, and the portion, located on the upper side of the O-shaped ring, of the installation seat is filled with padding. The valve rod located on the upper side of the padding is sleeved with a padding pressing sleeve, and a belleville spring and a padding gland are arranged on the upper side of the padding pressing sleeve. Through the structure, the problems that the sealing performance is poor and the sealing performance of the ball valve cannot be adjusted according to the environment are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a high-performance floating soft-sealing ball valve. Background Art

[0002] A floating soft-sealed ball valve is generally composed of a valve body, a valve seat, a ball, a valve stem, and a transmission mechanism. The ball adopts a floating structure, and its upper end is connected to the transmission mechanism through the valve stem. The valve seat adopts a soft sealing structure and is installed in the inlet and outlet channels of the valve body to form a soft sealing pair with the ball.

[0003] The sealing performance of the existing ball valve deteriorates after long-term use, and the sealing performance of the ball valve cannot be adjusted according to the environment, such as in a cold environment, a high-temperature environment, etc. Therefore, a high-performance floating soft-sealed ball valve is proposed. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a high-performance floating soft-sealed ball valve, which solves the problems of poor sealing and inability to adjust the sealing performance of the ball valve according to the environment.

[0005] The utility model also provides the above-mentioned high-performance floating soft-sealed ball valve, comprising a valve body, the right side of the valve body is connected to the valve side body by a nut, a valve body sealing gasket is arranged between the valve body and the valve side body, a mounting seat is arranged on the upper side of the valve body, a valve stem is rotatably connected in the mounting seat, a ball is rotatably connected in the valve body, a groove is arranged on the upper side of the ball, the lower end of the valve stem is embedded in the connecting groove, a valve seat sealing gasket is arranged at the connection between the ball, the valve body and the valve side body, the valve stem is provided with a thrust pad and an O-ring in sequence from bottom to top, the thrust pad is fixedly connected to the valve stem, the O-ring is sleeved on the valve stem, the mounting seat located on the upper side of the O-ring is filled with packing, a packing gland is sleeved on the valve stem located on the upper side of the packing, a disc spring and a packing gland are arranged on the upper side of the packing gland.

[0006] According to the high-performance floating soft-sealed ball valve, the upper end of the valve stem is connected to a handle via a nut, and a rubber sleeve is sleeved on the handle.

[0007] According to the high-performance floating soft-sealed ball valve, a positioning piece is provided on the valve stem below the connection between the mounting seat and the handle.

[0008] According to the high-performance floating soft-sealed ball valve, a locking nut is provided on the front side of the mounting seat.

[0009] According to the high-performance floating soft-sealed ball valve, the packing gland is located on the upper side of the disc spring.

[0010] According to the high-performance floating soft-sealed ball valve, the valve body and the mounting seat are integrated.

[0011] The utility model has the following beneficial effects:

[0012] 1. In the utility model, the mounting seat is filled with a filler, which is a V-shaped sealing structure, to ensure that the seal between the valve stem and the valve body reaches zero leakage, and the sealing effect is good; at the same time, the filler material can be replaced with other materials. When used in a fireproof environment, the filler material can be changed to flexible graphite, which can withstand a temperature of 800°C and will not be damaged or burned, and has good applicability.

[0013] 2. In the utility model, by providing a thrust pad and an O-ring on the valve stem, the valve stem can be prevented from rushing out of the valve body due to a sudden increase in the pressure in the cavity. At the same time, the O-ring can avoid direct friction between the valve stem and the valve body, and can also play an auxiliary role in the valve stem sealing, reducing the chance of external leakage.

[0014] 3. In the utility model, a disc spring is provided on the packing gland, which can play a compensatory role. When the sealing performance of the ball valve deteriorates after long-term use, the pre-tightening deformation can be released and the packing can be compressed again to ensure long-term reliable sealing and good sealing effect.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0017] Figure 1 This is a structural diagram of a high-performance floating soft-sealed ball valve of the utility model;

[0018] Figure 2 This is a cross-sectional view of a high-performance floating soft-sealed ball valve of the utility model;

[0019] Figure 3 for Figure 2 A magnified view of the structure at center.

[0020] Legend:

[0021] 1. Valve body; 2. Valve side body; 3. Valve stem; 4. Ball; 5. Valve seat gasket; 6. Packing; 7. Packing gland; 8. Packing gland; 9. Thrust pad; 10. Handle; 11. Valve body gasket; 12. Disc spring; 13. Positioning piece; 14. O-ring; 15. Mounting seat; 16. Lock nut. DETAILED DESCRIPTION

[0022] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0023] Reference Figure 1-3 The utility model embodiment is a high-performance floating soft-sealed ball valve, which includes a valve body 1. The right side of the valve body 1 is connected to the valve side body 2 through a nut. A valve body sealing gasket 11 is arranged between the valve body 1 and the valve side body 2. The material of the valve body sealing gasket 11 can be a graphite gasket, which can withstand a temperature of 800°C and will not be burned. A mounting seat 15 is arranged on the upper side of the valve body 1. The valve body 1 and the mounting seat 15 are integrally formed. A locking nut 16 is arranged on the front side of the mounting seat 15.

[0024] The valve stem 3 is rotatably connected in the mounting seat 15, and the upper end of the valve stem 3 is connected to the handle 10 through a nut. The handle 10 is provided with a positioning hole, and a rubber sleeve is sleeved at the rear end. A positioning piece 13 is provided on the valve stem 3 below the connection between the mounting seat 15 and the handle 10 to prevent misoperation. The positioning piece 13 is adapted to the positioning hole. A ball 4 is rotatably connected in the valve body 1. A groove is provided on the upper side of the ball 4. The lower end of the valve stem 3 is embedded in the connecting groove. A valve seat sealing gasket 5 is provided at the connection between the ball 4 and the valve body 1 and the valve side body 2. The valve seat sealing gasket 5 is made of PTFE. The valve stem 3 is provided with a thrust pad 9 and an O-ring 14 from bottom to top in sequence. The thrust pad 9 is fixedly connected to the valve stem 3 to prevent the valve stem 3 from rushing out of the valve body 1 due to a sudden increase in the pressure in the cavity. The O-ring 14 is sleeved on the valve stem 3. When the valve stem 3 is subjected to external force, the O-ring 14 can avoid direct friction between the valve stem 3 and the valve body 1, and at the same time can also play an auxiliary role in sealing the valve stem 3 to reduce the chance of leakage.

[0025] The mounting seat 15 located on the upper side of the O-ring 14 is filled with packing 6. The packing 6 has a V-shaped sealing structure to ensure that the seal between it, the valve stem 3 and the valve body 1 reaches zero leakage and has a good sealing effect. A packing sleeve 7 is sleeved on the valve stem 3 located on the upper side of the packing 6. A disc spring 12 and a packing gland 8 are provided on the upper side of the packing sleeve 7. The packing gland 8 is located on the upper side of the disc spring 12 and can play a compensatory role under the action of the disc spring 12. When the sealing performance of the ball valve deteriorates after long-term use, its pre-tightened deformation can be released and the packing 6 can be compressed again to ensure long-term and reliable sealing with a good sealing effect.

[0026] Working principle: When in use, the ball valve is installed on the pipeline through the flanges at both ends of the valve body 1 and the valve side body 2. The packing 6 is a V-shaped sealing structure to ensure that the seal between it and the valve stem 3 and the valve body 1 reaches zero leakage and has a good sealing effect. At the same time, when used in a fire-proof environment, the material of the packing 6 can be changed to flexible graphite, which can withstand a temperature of 800°C and will not be damaged or burned. The packing 6 has good applicability; a disc spring 12 is provided above the packing gland 8. Under the action of the disc spring 12, a compensation effect can be played. When the sealing of the ball valve deteriorates after long-term use, its pre-tightening deformation can be released and the packing 6 can be compressed again to ensure long-term reliable sealing and good sealing effect.

[0027] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A high performance floating soft-sealed ball valve, characterized in that: include: A valve body (1), the right side of the valve body (1) is connected to the valve side body (2) via a nut, a valve body sealing gasket (11) is provided between the valve body (1) and the valve side body (2), a mounting seat (15) is provided on the upper side of the valve body (1), a valve stem (3) is rotatably connected in the mounting seat (15), a ball (4) is rotatably connected in the valve body (1), a groove is provided on the upper side of the ball (4), the lower end of the valve stem (3) is embedded in the connecting groove, and the ball (4) is connected to the valve body (1) and the valve side body (2). A valve seat sealing gasket (5) is provided at the joint, and the valve stem (3) is provided with a thrust pad (9) and an O-ring (14) in sequence from bottom to top, the thrust pad (9) is fixedly connected to the valve stem (3), the O-ring (14) is sleeved on the valve stem (3), a packing (6) is filled in the mounting seat (15) located on the upper side of the O-ring (14), a packing gland (7) is sleeved on the valve stem (3) located on the upper side of the packing (6), and a disc spring (12) and a packing gland (8) are provided on the upper side of the packing gland (7).

2. A high performance floating soft-sealed ball valve according to claim 1, characterized in that: The upper end of the valve stem (3) is connected to a handle (10) via a nut, and a rubber sleeve is sleeved on the handle (10).

3. A high performance floating soft-sealed ball valve according to claim 2, characterized in that: A positioning piece (13) is provided on the valve stem (3) below the connection between the mounting seat (15) and the handle (10).

4. A high performance floating soft-sealed ball valve according to claim 3, characterized in that: A locking nut (16) is provided on the front side of the mounting seat (15).

5. A high performance floating soft-sealed ball valve according to claim 4, characterized in that: The packing gland (8) is located on the upper side of the disc spring (12).

6. A high performance floating soft-sealed ball valve according to claim 5, characterized in that: The valve body (1) and the mounting seat (15) are integrally formed.

Images