Wear-resistant ball valve

Abstract

The utility model discloses a wear-resisting ball valve which comprises a valve body, a flow channel is formed in the valve body, a ball body for controlling the flow channel to be opened and closed is arranged in the flow channel, a valve rod connected with the ball body is further arranged on the valve body, and an actuator which is located outside and controls the ball body is arranged on the valve rod. The ball valve is characterized in that a valve seat tightly attached to the ball body is arranged in the flow channel, a sealing piece for driving the valve seat to be tightly attached to the ball body is arranged in the valve body, the sealing piece comprises a sealing clamping block, a sealing base and a driving block, the ball body rotates on the sealing base, the sealing clamping block is fixed to the ball body, a sealing cavity is formed in the sealing base, and the driving block is arranged in the sealing cavity. A driving cavity is further formed in the valve body, the driving block slides in the driving cavity and is connected with the valve seat, an elastic piece is arranged on the sealing base, and when the ball body cuts off the flow channel, the sealing clamping block is matched with the elastic piece to extrude the sealing cavity and drive the driving block to slide. The valve has the advantages of being high in sealing performance and resistant to abrasion.

Description

Technical Field

[0001] The utility model relates to the field of ball valves, and more specifically, to a wear-resistant ball valve. Background Art

[0002] Ball valves, whose opening and closing parts are driven by the valve stem and rotate around the axis of the ball valve, can also be used for regulating and controlling fluids. The hard-sealed V-type ball valve has a strong shear force between its V-type ball core and the metal valve seat with hard alloy overlay, which is particularly suitable for media containing fibers, tiny solid particles, etc. The valve core of the hard-sealed ball valve is alloy steel spray welding, and the sealing ring is alloy steel overlay, so the hard-sealed ball valve will not produce too much wear when opening and closing. Ball valves are a common structure among valves, and ball valves can well control the on and off of gas or liquid flowing in the pipeline.

[0003] The existing ball valve has a hard seal between the valve seat and the valve ball. Once the valve seat is worn, the sealing performance of the valve ball will be affected. Based on this problem, the sealing structure is improved to enhance the wear resistance of the seal. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a wear-resistant ball valve which is more wear-resistant and has strong sealing performance.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a wear-resistant ball valve, comprising a valve body, a flow channel is formed on the valve body, a ball for controlling the opening and closing of the flow channel is arranged in the flow channel, a valve stem connected to the ball is also arranged on the valve body, and an actuator located outside and controlling the ball is arranged on the valve stem, wherein: a valve seat close to the ball is arranged in the flow channel, a sealing member driving the valve seat close to the ball is arranged in the valve body, the sealing member comprises a sealing block, a sealing base and a driving block, the ball rotates on the sealing base and the sealing block is fixed to the ball, a sealing cavity is formed in the sealing base, a driving cavity is also arranged on the valve body, the driving block slides in the driving cavity and is connected to the valve seat, an elastic member is arranged on the sealing base, but when the ball cuts off the flow channel, the sealing block cooperates with the elastic member to squeeze the sealing cavity and drive the driving block to slide.

[0006] By adopting the above technical solution, a sealing chamber is provided and gas is filled in the sealing chamber, so that when the ball rotates to the cut-off state, the sealing block can squeeze the sealing chamber to enhance the pressure, so that the pressure in the driving chamber increases and then the driving block drives the valve seat to press against the ball to ensure the valve sealing.

[0007] The utility model is further configured as follows: the elastic member includes a sealing plate, a sealing end is provided on the sealing plate, a sealing groove is provided on the sealing base, the sealing end slides in the sealing groove and is located in the outside, the sealing block clamps the sealing end, and the sealing plate squeezes the sealing cavity.

[0008] By adopting the above technical solution, the sealing plate slides in the sealing cavity, and when the sealing end is squeezed, the gas in the sealing cavity can be compressed.

[0009] The utility model is further configured as follows: guiding surfaces are arranged on both ends of the sealing end.

[0010] The utility model is further configured as follows: a rotation groove is provided on the sealing base, and the sealing block rotates in the rotation groove.

[0011] By adopting the above technical solution, a guiding inclined surface is provided to facilitate the engagement with the sealing block, and a rotating groove is provided to avoid collision damage.

[0012] The utility model is further configured as follows: a clamping groove is provided on the sealing end, a positioning groove is recessed on the sealing block, a first spring and a clamping ball are provided in the positioning groove, the first spring drives the clamping ball toward the direction of the rotating groove, and when the sealing block is tightly against the sealing end, the clamping ball is clamped in the positioning groove.

[0013] The utility model is further configured as follows: a limiting block is further arranged in the positioning groove, a movable groove is formed in the limiting block, the clamping ball moves in the movable groove, and the first spring is connected to the limiting block.

[0014] By adopting the above technical solution, the clamping ball can move in the movable groove, so that the sealing block rotates in the rotating groove and the clamping ball rotates at the same time, making the ball rotate more smoothly, and can provide a limiting effect when rotating to the positioning groove. The structure is convenient and practical.

[0015] The utility model is further configured as follows: the driving block is provided with a clamping end located in the driving cavity, a sealing groove is directly formed between the clamping end and the driving block, and a sealing ring is provided in the sealing groove.

[0016] By adopting the above technical solution, sealing and limiting are performed at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0018] Figure 2 A three-dimensional diagram of a sealing base according to an embodiment of the utility model;

[0019] Figure 3 A spherical stereogram of an embodiment of the utility model;

[0020] Figure 4 This is a cross-sectional view of the sealing block of the utility model embodiment

[0021] Figure 5 A cross-sectional view of the sealing base of the utility model embodiment;

[0022] Figure 6 This is an enlarged view of part A.

[0023] In the figure: 1. valve body; 12. ball; 13. valve seat; 2. sealing member; 21. sealing block; 22. sealing base; 23. drive block; 24. sealing chamber; 25. drive chamber; 3. elastic member; 31. sealing plate; 32. sealing end; 34. guide surface; 223. rotating groove; 4. snap-fit ​​ball; 41. snap-fit ​​groove; 43. limit block; 5. snap-fit ​​end; 51. sealing ring. DETAILED DESCRIPTION

[0024] Reference Figures 1 to 6 The utility model is further described in detail.

[0025] A wear-resistant ball valve comprises a valve body 1, a flow channel is provided on the valve body 1, a ball 12 for controlling the opening and closing of the flow channel is arranged in the flow channel, a valve stem connected to the ball 12 is also arranged on the valve body 1, an actuator located outside and controlling the ball 12 is arranged on the valve stem, a valve seat 13 close to the ball 12 is arranged in the flow channel, a sealing member 2 for driving the valve seat 13 to be close to the ball 12 is arranged in the valve body 1, the sealing member 2 comprises a sealing card block 21, a sealing base 22 and a driving block 23, the ball 12 rotates on the sealing base 22 and the sealing card The block 21 is fixed to the sphere 12, and a sealing cavity 24 is formed in the sealing base 22. A driving cavity 25 is also provided on the valve body 1. The driving block 23 slides in the driving cavity 25 and is connected to the valve seat 13. An elastic member 3 is provided on the sealing base 22. When the sphere 12 cuts off the flow channel, the sealing block 21 cooperates with the elastic member 3 to squeeze the sealing cavity 24 and drive the driving block 23 to slide. There is gas in the sealing cavity 24. When the sphere 12 rotates to the cut-off state, the sealing base 22 is squeezed to increase the pressure, thereby driving the valve seat 13 to press against the sphere.

[0026] The sealing block 21 is fixed at the lower end of the passage of the ball 12 . When the ball 12 cuts off the valve, the sealing block 21 drives the sealing base 22 to seal between the ball 12 and the valve seat 13 .

[0027] The elastic member 3 includes a sealing plate 31 , a sealing end 32 is provided on the sealing plate 31 , a sealing groove is provided on the sealing base 22 , the sealing end 32 slides in the sealing groove and is located outside, the sealing block 21 clamps the sealing end 32 , and the sealing plate 31 squeezes the sealing cavity 24 .

[0028] The sealing end 32 is provided with guide surfaces 34 at both ends. The sealing base 22 is provided with a rotation groove 223 , and the sealing block 21 rotates in the rotation groove 223 .

[0029] A clamping groove 41 is provided on the sealing end 32, and a positioning groove is recessed on the sealing block 21. A first spring and a clamping ball 4 are provided in the positioning groove. The first spring drives the clamping ball 4 toward the direction of the rotating groove 223. When the sealing block 21 is close to the sealing end 32, the clamping ball 4 is clamped in the positioning groove. A limiting block 43 is also provided in the positioning groove. A movable groove is formed in the limiting block 43. The clamping ball 4 moves in the movable groove, and the first spring is connected to the limiting block 43.

[0030] The driving block 23 is provided with a clamping end 5 located in the driving cavity 25 . A sealing groove is directly formed between the clamping end 5 and the driving block 23 . A sealing ring 51 is provided in the sealing groove.

[0031] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A wear-resistant ball valve, comprising a valve body (1), the valve body (1) being provided with a flow channel, the flow channel being provided with a ball (12) for controlling the opening and closing of the flow channel, the valve body (1) being further provided with a valve stem connected to the ball (12), the valve stem being provided with an actuator located outside and controlling the ball (12), wherein: A valve seat (13) is arranged in the flow channel and is in close contact with the ball (12). A sealing member (2) is arranged in the valve body (1) and is used to drive the valve seat (13) to be in close contact with the ball (12). The sealing member (2) comprises a sealing block (21), a sealing base (22) and a driving block (23). The ball (12) rotates on the sealing base (22) and the sealing block (21) is fixed to the ball (12). A sealing cavity (24) is formed in the sealing base (22). A driving cavity (25) is also arranged on the valve body (1). The driving block (23) slides in the driving cavity (25) and is connected to the valve seat (13). An elastic member (3) is arranged on the sealing base (22). When the ball (12) cuts off the flow channel, the sealing block (21) cooperates with the elastic member (3) to squeeze the sealing cavity (24) and drive the driving block (23) to slide.

2. The wear-resistant ball valve according to claim 1 is characterized in that: The elastic member (3) comprises a sealing plate (31), a sealing end (32) is arranged on the sealing plate (31), a sealing groove is arranged on the sealing base (22), the sealing end (32) slides in the sealing groove and is located outside, the sealing block (21) is clamped with the sealing end (32), and the sealing plate (31) squeezes the sealing cavity (24).

3. The wear-resistant ball valve according to claim 2 is characterized in that: The sealing end (32) is provided with guide surfaces (34) at both ends.

4. The wear-resistant ball valve according to claim 3 is characterized in that: The sealing base (22) is provided with a rotation groove (223), and the sealing block (21) rotates in the rotation groove (223).

5. The wear-resistant ball valve according to claim 4 is characterized in that: The sealing end (32) is provided with a snap-in groove (41), the sealing block (21) is recessed with a positioning groove, a first spring and a snap-in ball (4) are provided in the positioning groove, the first spring drives the snap-in ball (4) toward the direction of the rotating groove (223), and when the sealing block (21) is tightly against the sealing end (32), the snap-in ball (4) is snap-into the positioning groove.

6. The wear-resistant ball valve according to claim 5 is characterized in that: A limiting block (43) is also arranged in the positioning groove, a movable groove is formed in the limiting block (43), the engaging ball (4) moves in the movable groove, and the first spring is connected to the limiting block (43).

7. The wear-resistant ball valve according to claim 6 is characterized in that: The driving block (23) is provided with a clamping end (5) located in the driving cavity (25), the clamping end (5) and the driving block (23) directly form a sealing groove, and a sealing ring (51) is provided in the sealing groove.

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