Pneumatic soft sealing fixed adjusting ball valve

Abstract

The utility model belongs to the technical field of pneumatic adjusting ball valves, and discloses a pneumatic soft seal fixed adjusting ball valve which comprises a pneumatic actuating mechanism, and a support is arranged below the pneumatic actuating mechanism. A sealing body is arranged in the upper end of the valve body, and an upper valve shaft and a lower valve shaft are arranged in the lower end of the valve body; the upper valve shaft and the lower valve shaft are rotationally connected with the ball core, and a sealing ring is arranged on the periphery of the ball core and connected with a sealing seat. The valve body is connected with the valve deck, a flange inlet is formed in the side face of the valve deck, and a flange outlet is formed in the side face of the valve body. The bottom of the valve body is further connected with a lower cover. The pneumatic ball valve has the advantages of being compact in structure, good in sealing effect, long in service life and the like, and can be widely applied to the technical field of pneumatic ball valve production of electric power, steam conveying, biochemical engineering and the like.

Description

Technical Field

[0001] This utility model belongs to the field of pneumatic regulating ball valve technology, specifically relating to a pneumatic soft-seal fixed regulating ball valve. Background Technology

[0002] A regulating ball valve typically consists of two parts: a GT pneumatic piston actuator (single or double-acting) and a V-shaped ball valve. It belongs to the category of rotary shut-off regulating valves. The regulating ball valve employs a right-angle rotary structure internally, and its sealing methods primarily include soft seals and metal hard seals. Due to the right-angle rotary structure of the pneumatic V-shaped regulating ball valve, the valve core exhibits strong shearing action when rotating relative to the valve seat. Therefore, it is particularly suitable for regulating media containing fibers and small particles, and is widely used in industries such as petroleum, chemical, power, papermaking, and metallurgy.

[0003] Patent application number "20222325751.0" describes a soft-seal ball valve, including a valve body with a valve cover, a fluid channel within the valve body, a valve ball at the center of the fluid channel, and valve seats on both sides of the valve ball. A soft-seal structure is provided between a fixed ring and a movable ring, and after assembly, the valve ball, fixed ring, and movable ring fit tightly together, ensuring a tight seal between the valve ball and the movable ring. Patent application number "202223481914.3" describes an integrated ball-seat soft-seal ball valve, including a soft-seal ball valve body. Both ends of the soft-seal ball valve body are connected to water pipe joints. A flexible material buffer assembly is installed at the bottom of the support component, and the base plate of the buffer assembly is fixedly connected to the support surface, improving the stability of the soft-seal ball valve body in the pipeline. However, the valve core and seat of existing pneumatic soft-seal regulating ball valves mostly adopt a straight-cylinder tight-fitting structure. After long-term use and wear, their flow control stability becomes poor, and they are even prone to leakage. Furthermore, the sealing rings of existing soft-seal regulating ball valves are not sufficiently designed, resulting in poor sealing performance for high-temperature gases. Therefore, the structure of existing soft-seal regulating ball valves needs further improvement. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a pneumatic soft-seal fixed regulating ball valve, which has the characteristics of compact structure, good sealing effect and long service life, and can be widely used in the production technology field of pneumatic ball valves in power, steam transmission, biochemical and other fields.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a pneumatic soft-seal fixed regulating ball valve, comprising a pneumatic actuator, with a support below the pneumatic actuator; a valve body is connected below the support, a sealing body is provided inside the upper end of the valve body, and an upper valve shaft and a lower valve shaft are provided inside the lower end; the upper valve shaft and the lower valve shaft are rotatably connected to a ball core, a sealing ring is provided around the ball core, and the sealing ring is connected to a sealing seat; the valve body is connected to a valve cover, a flange inlet is provided on the side of the valve cover, and a flange outlet is provided on the side of the valve body; a lower cover is also connected to the bottom of the valve body.

[0006] As an improvement, a connector is provided inside the upper part of the bracket, through which the pneumatic actuator at the top is connected.

[0007] As an improvement, the connector is connected to the upper valve shaft, thereby controlling the rotation angle of the upper valve shaft to achieve flow control.

[0008] As an improvement, a pressure plate is provided at the bottom inside the bracket, and the surface of the pressure plate is provided with evenly distributed long bolts, which are fixedly connected to the valve body.

[0009] As an improvement, a packing sleeve is provided below the pressure plate, and packing is provided below the packing sleeve. The bracket is sealed to the valve body through the packing, and the packing is located inside the sealing body.

[0010] As an improvement, the inner and outer surfaces of the sealing body are provided with multiple grooves, and O-rings are provided at each groove.

[0011] As an improvement, the upper valve shaft is connected to the upper sleeve of the valve shaft, and the lower valve shaft is connected to the lower sleeve of the valve shaft.

[0012] As an improvement, the bottom of the lower valve shaft is provided with an adjusting pad and a bottom O-ring seal. The valve body is connected to the lower cover through the adjusting pad and the bottom O-ring seal, which facilitates the adjustment of the overall ball valve's level performance during installation.

[0013] As an improvement, the lower cover surface is provided with four symmetrically distributed fixing bolts, which are used to fix the entire regulating ball valve to the support frame, thus avoiding gas leakage caused by insufficient flange connection force.

[0014] As an improvement, the O-ring and the bottom O-ring are made of either nitrile rubber or polytetrafluoroethylene.

[0015] The beneficial effects achieved by this utility model are as follows: A pneumatic soft-seal fixed regulating ball valve has the characteristics of compact structure, good sealing effect, and long service life; by setting a groove-type sealing body structure at the upper end of the valve body and setting multiple sealing rings in the groove, the sealing performance inside the valve body is greatly improved, and it also has good and durable sealing performance for the valve shaft to rotate inside for a long time; by setting an adjusting pad and an O-ring at the bottom of the lower valve shaft, it is convenient to adjust the overall level of the ball valve after installation, ensuring the stability of the inlet and outlet flow, and improving the rotational sealing performance of the lower valve shaft, thus increasing the service life of the ball valve; in addition, by setting a fixing bolt at the bottom of the lower cover, the fixed connection of the ball valve is facilitated, avoiding the problem of internal gas leakage caused by insufficient connection force or excessive force of the inlet and outlet flanges, and reducing safety hazards. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the pneumatic soft-seal fixed regulating ball valve of this utility model.

[0017] In the diagram: 1. Pneumatic actuator; 2. Bracket; 3. Valve body; 4. Sealing body; 5. Upper valve shaft; 6. Lower valve shaft; 7. Ball core; 8. Sealing ring; 9. Sealing seat; 10. Valve cover; 11. Flange inlet; 12. Flange outlet; 13. Lower cover; 14. Connecting piece; 15. Pressure plate; 16. Long bolt; 17. Packing; 18. O-ring seal; 19. Upper valve shaft sleeve; 20. Lower valve shaft sleeve; 21. Adjusting shim; 22. Bottom O-ring seal; 23. Fixing bolt; 24. Adjusting nut; 25. Packing gland. Detailed Implementation

[0018] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0019] like Figure 1 As shown, a pneumatic soft-seal fixed regulating ball valve of this embodiment includes a pneumatic actuator 1, with a bracket 2 below the pneumatic actuator 1; a valve body 3 is connected below the bracket 2, and a sealing body 4 is provided inside the upper end of the valve body 3, while an upper valve shaft 5 and a lower valve shaft 6 are provided inside the lower end; the upper valve shaft 5 and the lower valve shaft 6 are rotatably connected to a ball core 7, and a sealing ring 8 is provided around the ball core 7, which is connected to a sealing seat 9; a valve cover 10 is connected to the valve body 3, and a flange inlet 11 is provided on the side of the valve cover 10, which is connected to an air inlet pipe through a corresponding flange; a flange outlet 12 is provided on the side of the valve body 3, which is connected to an air outlet pipe through a corresponding flange, and the air inlet flow is precisely adjusted by the pneumatic actuator 1, and after being adjusted to a specified flow rate, it is discharged from the flange outlet to the air outlet pipe, thus realizing the function of flow regulation; a lower cover 13 is also connected to the bottom of the valve body 3.

[0020] Furthermore, a connector 14 is provided inside the upper part of the bracket 2, which is connected to the pneumatic actuator 1 at the top. Specifically, the pneumatic actuator 1 is connected to the air inlet pipe and operates by inputting a constant air pressure of 0.8MPa. An adjusting nut 24 is provided at the top for adjusting the air inlet pressure. Specifically, the connector 14 is connected to the upper valve shaft 5, thereby controlling the rotation angle of the upper valve shaft 5 to achieve flow control.

[0021] Furthermore, a pressure plate 15 is provided at the lower interior of the bracket 2, and long bolts 16 are evenly distributed on the surface of the pressure plate 15. The long bolts 16 are used to fix the bracket to the valve body 3. Specifically, there are four long bolts 16, which are evenly distributed at the four corners of the pressure plate 15, thus facilitating the fixation of the bracket to the valve body. More specifically, a packing sleeve 25 is provided below the pressure plate 15, and a packing 17 is provided below the packing sleeve 16. The bracket 2 achieves a sealed connection with the valve body 3 through the packing 17, and the packing 17 is located inside the sealing body 4, which solves the gap problem caused by hard contact between the packing sleeve 25 and the sealing body 4. Specifically, the packing 17 is made of soft graphite material, which can ensure better sealing and high temperature resistance.

[0022] Furthermore, the inner and outer surfaces of the sealing body 4 are provided with multiple grooves, and each groove is provided with an O-ring 18; specifically, the O-ring 18 is made of either nitrile rubber or polytetrafluoroethylene, preferably nitrile rubber.

[0023] Furthermore, the upper valve shaft 5 is connected to the upper valve shaft sleeve 19, and the lower valve shaft 6 is connected to the lower valve shaft sleeve 20. Specifically, the lower valve shaft 6 is provided with an adjusting pad 21 and a bottom O-ring seal 22 at its bottom. The valve body 3 is connected to the lower cover 13 through the adjusting pad 21 and the bottom O-ring seal 22. On the one hand, this facilitates the adjustment of the overall ball valve's level during installation, as the adjusting pad 21 can achieve a slight self-adjustment of the level. On the other hand, it improves the rotational sealing performance of the lower valve shaft and increases the overall service life of the ball valve. Specifically, the bottom O-ring seal 22 is made of either nitrile rubber or polytetrafluoroethylene, preferably nitrile rubber.

[0024] Furthermore, the lower cover 13 is provided with four symmetrically distributed fixing bolts 23, which fix the entire regulating ball valve to the support frame, avoiding gas leakage caused by insufficient flange connection force, and further improving the service life of the regulating ball valve.

[0025] This utility model of a pneumatic soft-seal fixed regulating ball valve features a compact structure, excellent sealing effect, and long service life. It achieves an upper soft seal by setting a groove-type sealing body structure at the upper end of the valve body and placing multiple soft sealing rings in the groove. Simultaneously, an adjusting pad and soft sealing ring are placed at the bottom of the lower valve shaft to achieve a lower soft seal. Furthermore, a sealing ring and sealing seat are placed around the ball core to ensure a soft seal even during ball rotation. This reduces frictional resistance and improves the sealing effect, minimizing safety hazards caused by leakage. It is widely used in the production technology of pneumatic ball valves in power, steam transmission, and biochemical industries.

[0026] Finally, it should be noted that the above examples are merely specific embodiments of this utility model. Obviously, this utility model is not limited to the above embodiments and can have many variations. All variations that can be directly derived or conceived by those skilled in the art from the disclosure of this utility model should be considered within the protection scope of this utility model.

Claims

1. A pneumatic soft-seal fixed regulating ball valve, comprising a pneumatic actuator (1), characterized in that, The pneumatic actuator (1) is provided with a bracket (2) below it; the bracket (2) is connected to the valve body (3) below it. The valve body (3) has a sealing body (4) inside the upper end and an upper valve shaft (5) and a lower valve shaft (6) inside the lower end. The upper valve shaft (5) and the lower valve shaft (6) are rotatably connected to the ball core (7). The ball core (7) is provided with a sealing ring (8) around its periphery. The sealing ring (8) is connected to the sealing seat (9). The valve body (3) is connected to the valve cover (10). The valve cover (10) has a flange inlet (11) on its side and a flange outlet (12) on its side. The bottom of the valve body (3) is also connected to a lower cover (13).

2. The pneumatic soft-seal fixed regulating ball valve according to claim 1, characterized in that, The bracket (2) has a connector (14) on the upper part inside, and the pneumatic actuator (1) at the top is connected through the connector (14).

3. The pneumatic soft-seal fixed regulating ball valve according to claim 2, characterized in that, The connector (14) is connected to the upper valve shaft (5), thereby controlling the rotation angle of the upper valve shaft (5) to achieve flow control.

4. The pneumatic soft-seal fixed regulating ball valve according to claim 1, characterized in that, The bracket (2) has a pressure plate (15) at the bottom inside. The surface of the pressure plate (15) is provided with evenly distributed long bolts (16), which are fixedly connected to the valve body (3) through the long bolts (16).

5. The pneumatic soft-seal fixed regulating ball valve according to claim 4, characterized in that, A packing sleeve (25) is provided below the pressure plate (15), and a packing (17) is provided below the packing sleeve (25). The bracket (2) is sealed to the valve body (3) through the packing (17), and the packing (17) is located inside the sealing body (4).

6. The pneumatic soft-seal fixed regulating ball valve according to claim 1, characterized in that, The sealing body (4) has multiple grooves on its inner and outer surfaces, and O-rings (18) are provided at each groove.

7. The pneumatic soft-seal fixed regulating ball valve according to claim 1, characterized in that, The upper valve shaft (5) is connected to the upper valve shaft sleeve (19), and the lower valve shaft (6) is connected to the lower valve shaft sleeve (20).

8. The pneumatic soft-seal fixed regulating ball valve according to claim 7, characterized in that, The lower valve shaft (6) is provided with an adjusting pad (21) and a bottom O-ring seal (22) at the bottom. The valve body (3) is connected to the lower cover (13) through the adjusting pad (21) and the bottom O-ring seal (22).

9. The pneumatic soft-seal fixed regulating ball valve according to claim 8, characterized in that, The lower cover (13) has four symmetrically distributed fixing bolts (23) on its surface. The fixing bolts (23) are used to fix the entire regulating ball valve to the support frame to avoid gas leakage caused by insufficient flange connection force.

10. The pneumatic soft-seal fixed regulating ball valve according to claim 6 or 8, characterized in that, The O-ring (18) and the bottom O-ring (22) are made of either nitrile rubber or polytetrafluoroethylene.

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