A long-life pneumatic three-way high-pressure ball valve

Abstract

This invention provides a long-life pneumatic three-way high-pressure ball valve, comprising a ball valve body and a control ball rotatably disposed inside the ball valve body. Two mounting grooves are symmetrically arranged on the inner side of the ball valve body with the control ball as the center of symmetry. Each mounting groove contains a sealing structure, which includes an elastic element, a movable seat, and a sealing bowl sequentially disposed inside the mounting groove. The elastic element applies a spring force to the sealing bowl, pointing towards the control ball, through the movable seat, causing the sealing bowl to abut against the control ball. The elastic element also applies a spring force to the sealing bowl, pointing towards the control ball, through the movable seat, causing the sealing bowl to abut against the movable ball, thereby sealing the gap between the movable ball and the ball valve body. When the sealing bowl wears, the elastic element can use its spring force to drive the movable seat and the sealing bowl towards the control ball, ensuring the sealing bowl remains abutted against the movable ball, thus extending the service life of the high-pressure ball valve.

Description

Technical Field

[0001] This utility model relates to high-pressure ball valves, and more particularly, to a long-life pneumatic three-way high-pressure ball valve. Background Technology

[0002] Currently, Chinese patent CN201610951U discloses a high-pressure ball valve, including a valve body, a float rotatably disposed inside the valve body, a transition joint threaded to the end of the valve body, and a sealing bowl disposed between the float and the transition joint. An upper O-ring is provided at the connection between the transition joint and the valve body, and a lower O-ring is provided between the transition joint and the sealing bowl. However, when this high-pressure ball valve is used in a dry nitrogen or air environment, the sealing bowl is prone to wear due to the lack of a good lubricant inside the valve, which significantly reduces the service life of the high-pressure ball valve. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a long-life pneumatic three-way high-pressure ball valve, which has the advantage of a long service life.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a long-life pneumatic three-way high-pressure ball valve, including a ball valve body and a control ball rotatably disposed inside the ball valve body. The inner side of the ball valve body is symmetrically provided with the control ball as the center of symmetry. Each of the mounting slots is provided with a sealing structure. The sealing structure includes an elastic element, a movable seat, and a sealing bowl arranged sequentially inside the mounting slot. The elastic element applies a spring force to the sealing bowl pointing towards the control ball through the movable seat, so that the sealing bowl and the control ball are tightly pressed together.

[0005] Through the above technical solution, the elastic element applies a spring force to the sealing bowl, pointing towards the control ball, via the movable seat, causing the sealing bowl to abut against the movable ball and sealing the gap between the movable ball and the ball valve body. When the sealing bowl wears, the elastic element can use its spring force to drive the movable seat and the sealing bowl towards the control ball, ensuring that the sealing bowl remains abutted against the movable ball, thereby extending the service life of the high-pressure ball valve.

[0006] Preferably, the elastic element is a butterfly spring, and the outer ring of the butterfly spring abuts against the inner wall of the mounting groove.

[0007] With the above technical solution, the outer ring of the disc spring abuts against the inner wall of the mounting groove. In this way, the extension and contraction of the disc spring will be limited and guided by the inner wall of the mounting groove, making it less likely to bend during the extension and contraction process.

[0008] Preferably, the end of the movable seat is provided with a guide tube, the end of the guide tube extends into the inner hole of the butterfly spring, and the outer wall of the guide tube abuts against the inner ring of the butterfly spring to guide the extension and retraction of the butterfly spring.

[0009] With the above technical solution, the outer wall of the guide tube abuts against the inner ring of the butterfly spring, so that the extension and contraction of the butterfly spring will be limited and guided by the guide tube, and it is not easy for it to bend during the extension and contraction process.

[0010] Preferably, the end of the sealing bowl is provided with a sealing curved surface, which is in close contact with the outer wall of the control sphere.

[0011] Through the above technical solution, the sealing surface can fit snugly against the control ball, making the high-pressure ball valve have more reliable sealing performance.

[0012] Preferably, a sealing ring groove is provided on the inner wall of the mounting groove in a coaxial arrangement, and an O-ring is embedded in the sealing ring groove, with the inner ring of the O-ring abutting against the sealing bowl.

[0013] Through the above technical solution, the O-ring can seal the gap between the sealing bowl and the inner wall of the mounting groove, further improving the sealing performance of the high-pressure ball valve.

[0014] Preferably, the inner wall of the mounting groove is provided with a guide groove arranged along the axial direction, and the outer wall of the movable seat is provided with a placement groove. A thrust spring and a guide slider are sequentially arranged in the placement groove, and the thrust spring drives the guide slider to extend into the guide groove through its elastic force.

[0015] The above technical solution allows the guide slider and guide groove to cooperate in restricting the circumferential rotation of the movable seat, thereby avoiding the impact of the circumferential rotation of the movable seat on the elastic force of the disc spring. The guide slider is slidably positioned in the placement groove, making the assembly and disassembly of the movable seat more convenient.

[0016] Preferably, the inner sidewall of the movable seat is provided with a threaded assembly groove that is coaxially connected to the placement groove. The width of the threaded assembly groove is greater than the width of the placement groove. A plug is threaded into the threaded assembly groove, and the length of the plug is less than the groove depth of the threaded assembly groove.

[0017] With the above technical solution, the thrust spring and guide slider can be easily disassembled and assembled simply by removing the plug from the threaded assembly groove, making the assembly of the high-pressure ball valve more convenient.

[0018] Preferably, the end of the plug is provided with a push block, which is used to extend into the placement groove and abut against the thrust spring.

[0019] Through the above technical solution, the push block can abut against the push spring to squeeze the push spring, thereby changing the elastic force applied by the push spring to the guide slider. Attached Figure Description

[0020] Figure 1 This is an assembly diagram of an embodiment; Figure 2 This is a cross-sectional schematic diagram of an embodiment; Figure 3 for Figure 2 Enlarged view of part A.

[0021] Reference numerals: 1. Ball valve body; 2. Control ball; 3. Mounting groove; 4. Sealing structure; 41. Elastic element; 42. Movable seat; 43. Sealing bowl; 5. Guide tube; 6. Sealing surface; 7. Sealing ring groove; 8. O-ring; 9. Guide groove; 10. Placement groove; 11. Thrust spring; 12. Guide slider; 13. Threaded assembly groove; 14. Plug; 15. Push block. Detailed Implementation

[0022] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this utility model can be more easily understood and mastered.

[0023] A long-life pneumatic three-way high-pressure ball valve, such as Figures 1 to 3 As shown, the device includes a ball valve body 1 and a control ball 2 rotatably disposed inside the ball valve body 1. The front end of the ball valve body 1 has an axially oriented medium outlet 1, and the rear end of the ball valve body 1 has an axially oriented medium outlet 2, which is coaxially connected to the medium outlet. The lower middle part of the ball valve body 1 has a radially oriented medium inlet, which is perpendicularly connected to both medium outlet 1 and medium outlet 2. An L-shaped connecting channel is disposed throughout the control ball 2. The lower end of the L-shaped connecting channel is connected to the medium inlet, and the upper end of the L-shaped connecting channel is connected to either medium outlet 1 or medium outlet 2.

[0024] Two mounting grooves 3 are symmetrically arranged on the inner side of the ball valve body 1 with the control ball 2 as the center of symmetry. The two mounting grooves 3 are respectively connected to medium outlet one and medium outlet two. Each mounting groove 3 is provided with a sealing structure 4. The sealing structure 4 includes an elastic element 41, a movable seat 42 and a sealing bowl 43 arranged sequentially on the inner side of the mounting groove 3. The elastic element 41 applies a spring force to the sealing bowl 43 through the movable seat 42, pointing towards the control ball 2, so that the sealing bowl 43 abuts against the control ball 2.

[0025] In this embodiment, the elastic element 41 is a butterfly spring. The inner wall of the mounting groove 3 abuts against the outer ring of the butterfly spring to guide the extension and retraction of the butterfly spring. The end of the movable seat 42 is provided with a guide tube 5. The end of the guide tube 5 extends into the inner hole of the butterfly spring, and the outer wall of the guide tube 5 abuts against the inner ring of the butterfly spring to further guide the extension and retraction of the butterfly spring.

[0026] The end of the sealing bowl 43 is provided with a sealing curved surface 6, which is in close contact with the outer wall of the control ball 2.

[0027] The inner wall of the mounting groove 3 is provided with a sealing ring groove 7 arranged coaxially. An O-ring seal 8 is embedded in the sealing ring groove 7, and the inner ring of the O-ring seal 8 is abutted against the sealing bowl 43.

[0028] The inner wall of the mounting groove 3 has an axially oriented guide groove 9, and the outer wall of the movable seat 42 has a placement groove 10. A thrust spring 11 and a guide slider 12 are sequentially arranged in the placement groove 10. The thrust spring 11 drives the guide slider 12 into the guide groove 9 through its elastic force. The inner wall of the movable seat 42 has a threaded assembly groove 13 coaxially connected to the placement groove 10. The width of the threaded assembly groove 13 is greater than the width of the placement groove 10. A plug 14 is threaded into the threaded assembly groove 13, and the length of the plug 14 is less than the groove depth of the threaded assembly groove 13. A push block 15 is provided at the end of the plug 14, which extends into the placement groove 10 and abuts against the thrust spring 11.

[0029] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A long-life pneumatic three-way high-pressure ball valve, comprising a ball valve body (1) and a control ball (2) rotatably disposed inside the ball valve body (1), characterized in that: The inner side of the ball valve body (1) is symmetrically provided with the control ball (2) as the center of symmetry. Each of the mounting slots (3) is provided with a sealing structure (4). The sealing structure (4) includes an elastic element (41), a movable seat (42) and a sealing bowl (43) arranged in sequence on the inner side of the mounting slot (3). The elastic element (41) applies a spring force to the sealing bowl (43) through the movable seat (42) in a direction pointing towards the control ball (2), so that the sealing bowl (43) abuts against the control ball (2).

2. The long-life pneumatic three-way high-pressure ball valve according to claim 1, characterized in that: The elastic element (41) is a butterfly spring, and the outer ring of the butterfly spring abuts against the inner groove wall of the mounting groove (3).

3. A long-life pneumatic three-way high-pressure ball valve according to claim 2, characterized in that: The movable seat (42) is provided with a guide tube (5) at its end. The end of the guide tube (5) extends into the inner hole of the butterfly spring, and the outer wall of the guide tube (5) abuts against the inner ring of the butterfly spring to guide the extension and retraction of the butterfly spring.

4. A long-life pneumatic three-way high-pressure ball valve according to claim 1, characterized in that: The sealing bowl (43) has a sealing curved surface (6) at its end, and the sealing curved surface (6) is in close contact with the outer wall of the control ball (2).

5. A long-life pneumatic three-way high-pressure ball valve according to claim 1, characterized in that: The inner wall of the mounting groove (3) is provided with a sealing ring groove (7) arranged coaxially. An O-ring (8) is embedded in the sealing ring groove (7), and the inner ring of the O-ring (8) abuts against the sealing bowl (43).

6. A long-life pneumatic three-way high-pressure ball valve according to claim 1, characterized in that: The inner wall of the mounting groove (3) is provided with a guide groove (9) arranged along the axial direction, and the outer wall of the movable seat (42) is provided with a placement groove (10). A thrust spring (11) and a guide slider (12) are arranged in sequence in the placement groove (10). The thrust spring (11) drives the guide slider (12) to extend into the guide groove (9) by elastic force.

7. A long-life pneumatic three-way high-pressure ball valve according to claim 6, characterized in that: The inner side wall of the movable seat (42) is provided with a threaded assembly groove (13) that is coaxially connected to the placement groove (10). The width of the threaded assembly groove (13) is greater than the width of the placement groove (10). A plug (14) is threadedly connected in the threaded assembly groove (13). The length of the plug (14) is less than the groove depth of the threaded assembly groove (13).

8. A long-life pneumatic three-way high-pressure ball valve according to claim 7, characterized in that: The end of the plug (14) is provided with a push block (15), which is used to extend into the placement groove (10) and abut against the thrust spring (11).

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