A V-type ball valve with good sealing performance

Abstract

This utility model discloses a V-type ball valve with good sealing performance. A ball cavity is set in the center of the valve seat, and the ball valve body is rotatably set in the ball cavity. A first flange and a second flange are set at both ends of the valve seat. A first groove and a second groove are continuously formed on the inner wall of the valve seat at the first flange end. A pressure ring is movably set in the first groove, and a pressing sleeve is set in the second groove. Several first spring grooves and guide grooves are formed on the end of the pressure ring near the pressing sleeve. Several second spring grooves and guide posts are formed on the end of the pressing sleeve near the pressure ring. The first spring grooves and second spring grooves correspond one-to-one and are provided with springs inside. The guide posts are guided and cooperate with the guide grooves. A sealing ring is set in the annular groove at the end of the pressure ring away from the pressing sleeve. The sealing ring is tightly connected to the ball valve body. This utility model has a reasonable structure. The sealing ring can tightly press the surface of the ball valve body, greatly improving the sealing performance and solving the problem of reduced life due to long-term friction between the ball valve body and the valve seat.

Description

Technical Field

[0001] This utility model relates to the field of machinery, and more particularly to valve technology, specifically a V-type ball valve with good sealing performance. Background Technology

[0002] The V-type ball valve is a fixed ball valve characterized by excellent regulating performance, equal percentage flow characteristics, and an adjustable ratio of up to 100:1. Its shearing action between the V-shaped notch and the metal seat is suitable for media containing fibers, small solid particles, slurries, etc. This valve is suitable for frequent operation and offers advantages such as rapid opening and closing, ease of use, simple structure, low fluid resistance, small size, light weight, easy maintenance, good sealing performance, no installation direction restrictions, arbitrary media flow direction, vibration-free operation, and low noise.

[0003] Traditional V-type ball valves mostly adopt an eccentric structure. When the V-type ball valve is opened, the ball valve body separates from the inner wall of the valve seat. When the V-type ball valve is closed, there is hard friction between the arc surface of the ball valve body and the valve seat, which greatly reduces the service life of the valve seat. Therefore, there is an urgent need for an improved technology to solve the above-mentioned problems in the existing technology. Utility Model Content

[0004] The purpose of this invention is to provide a V-type ball valve with good sealing performance to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a V-type ball valve with good sealing performance, comprising a valve seat, a ball valve body, and a sealing assembly;

[0006] A ball cavity is provided at the center of the valve seat, and the ball valve body is rotatably disposed in the ball cavity. A first cylinder is provided at the top of the valve seat, and a second cylinder is provided coaxially with the first cylinder at the bottom of the valve seat. A V-shaped groove is provided on the ball valve body. A valve stem is connected to the top of the ball valve body, and a shaft is connected to the bottom of the ball valve body. The valve stem is rotatably disposed in the first cylinder, and the shaft is rotatably disposed in the second cylinder. A first flange and a second flange are provided at both ends of the valve seat. A first groove and a second groove are continuously provided on the inner wall of the valve seat at one end of the first flange.

[0007] The sealing assembly includes a pressure ring, a pressing sleeve, and a sealing ring. The pressure ring is movably disposed in a first groove, and the pressing sleeve is disposed in a second groove. The pressure ring has several first spring grooves and guide grooves at the end near the pressing sleeve, and the pressing sleeve has several second spring grooves and guide posts at the end near the pressure ring. The first spring grooves and second spring grooves correspond one-to-one and each contains a spring. The two ends of each spring are supported in the first spring groove and the second spring groove, respectively. The guide posts correspond one-to-one with the guide grooves and provide guiding engagement. The pressure ring has an annular groove at the end away from the pressing sleeve, and a sealing ring is disposed in the annular groove. The sealing ring is tightly connected to the ball valve body.

[0008] Preferably, the present invention provides a V-type ball valve with good sealing performance, wherein the bottom of the second cylinder is provided with a bottom cover by bolts, the bottom cover is provided with a protrusion, and the protrusion is supported on the bottom of the shaft.

[0009] Preferably, the present invention provides a V-type ball valve with good sealing performance, wherein the first cylinder is provided with packing, and the valve stem is tightly fitted with the packing.

[0010] Preferably, the present invention provides a V-type ball valve with good sealing performance, wherein square holes are provided at the center of the top and bottom of the ball valve body, the bottom of the valve stem is inserted into the square hole at the top of the ball valve body, and the top of the shaft is inserted into the square hole at the bottom of the ball valve body.

[0011] Preferably, the present invention provides a V-type ball valve with good sealing performance, wherein the pressing sleeve has several countersunk holes, and the countersunk holes of the pressing sleeve are fastened to the first flange of the valve seat by bolts.

[0012] Preferably, in the V-type ball valve with good sealing performance provided by this utility model, the length of the first groove along the axial direction is greater than the thickness of the pressure ring.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The valve seat has a first groove and a second groove inside, located at one end of the first flange. The pressure ring is movably disposed in the first groove. Several springs are arranged between the pressure ring and the pressing sleeve and guided by guide posts. A sealing ring is arranged in the annular groove on the inner side of the pressure ring. The springs cause the pressure ring to be subjected to a force pointing towards the ball valve body. The sealing ring can tightly press the surface of the ball valve body, greatly improving the sealing performance. In addition, the sealing ring solves the problem of reduced lifespan caused by long-term friction between the ball valve body and the valve seat. At the same time, the pressure spring is pressed by the pressing sleeve, which is connected to the valve seat by bolts, thus facilitating the replacement of the sealing ring and greatly improving convenience. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the cross-sectional structure of the present invention;

[0016] Figure 2 For the appendix Figure 1 Enlarged structural diagram of point A in the middle;

[0017] Figure 3 For the appendix Figure 2 Enlarged structural diagram of point B in the middle;

[0018] Figure 4 This is a schematic diagram of the valve seat cross-section structure;

[0019] Figure 5 This is a schematic diagram of the cross-sectional structure of the pressure ring and the pressing sleeve of this utility model;

[0020] Figure 6 This is a schematic diagram of the front view of the pressure ring structure;

[0021] Figure 7 For the appendix Figure 6 A schematic diagram of the rear view structure;

[0022] Figure 8 A front view schematic diagram of the pressing sleeve structure.

[0023] In the diagram: 1. Valve seat; 2. Ball valve body; 3. First cylinder; 4. Second cylinder; 5. V-groove; 6. Valve stem; 7. First flange; 8. Second flange; 9. First groove; 10. Second groove; 11. Pressure ring; 12. Pressing sleeve; 13. Sealing ring; 14. First spring groove; 15. Guide groove; 16. Second spring groove; 17. Guide post; 18. Annular groove; 19. Spring; 20. Bottom cover; 21. Protrusion; 22. Packing; 23. Square hole; 24. Countersunk hole; 25. Detailed Implementation

[0024] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] It should be noted that in the description of this utility model, the terms "inner", "outer", "upper", "lower", "both sides", "one end", "the other end", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Please see Figure 1-8 This utility model provides a technical solution: a V-type ball valve with good sealing performance, including a valve seat 1, a ball valve body 2 and a sealing assembly;

[0027] A ball cavity is located at the center of the valve seat 1. The ball valve body 2 is rotatably disposed within the ball cavity. A first cylindrical body 3 is located at the top of the valve seat 1, and a second cylindrical body 4 is coaxially disposed at the bottom of the valve seat 1 with the first cylindrical body 3. The ball valve body 2 has a V-groove 5. A valve stem 6 is connected to the top of the ball valve body 2, and a shaft 7 is connected to the bottom of the ball valve body 2. Square holes 24 are located at the center of both the top and bottom of the ball valve body 2. The bottom of the valve stem 6 is inserted into the square hole 24 at the top of the ball valve body 2, and the top of the shaft 7 is inserted into the square hole 24 at the bottom of the ball valve body 2. The valve stem 6 drives the ball valve body 2 to rotate through the square holes 24. The valve stem 6 is rotatably disposed within the first cylindrical body 3. The valve stem 6 is tightly fitted with packing 23, which ensures the sealing of the valve stem 6. The packing 23 is limited and pressed by the flange of the external bracket, which is used to install the electric / pneumatic actuator. The shaft 7 is rotatably mounted in the second cylinder 4. The bottom of the second cylinder 4 is bolted to a bottom cover 21 with a protrusion 22. The protrusion 22 supports the bottom of the shaft 7. The bottom cover 21 achieves sealing at the second cylinder 4 and supports the shaft 7. The valve seat 1 is provided with a first flange 8 and a second flange 9 at both ends. The inner wall of the valve seat 1 at the first flange 8 end is continuously provided with a first groove 10 and a second groove 11.

[0028] The sealing assembly includes a pressure ring 12, a pressing sleeve 13, and a sealing ring 14. The pressure ring 12 is movably disposed within a first groove 10, the axial length of which is greater than the thickness of the pressure ring 12, to ensure that the pressure ring 12 can slide within the first groove 10. The pressing sleeve 13 is disposed within a second groove 11 and has several countersunk holes 25. The countersunk holes 25 of the pressing sleeve 13 are fastened to the first flange 8 of the valve seat 1 by bolts. The countersunk holes 25 conceal the bolt heads, preventing the first flange 8 from being unable to connect to the pipeline. The pressure ring 12 is close to the pressing sleeve 14. The sleeve 13 has several first spring grooves 15 and guide grooves 16 at one end. The pressing sleeve 13 has several second spring grooves 17 and guide posts 18 at the end near the pressure ring 12. The first spring grooves 15 and second spring grooves 17 correspond one-to-one and are provided with springs 20 inside. The two ends of the springs 20 are respectively supported in the first spring grooves 15 and second spring grooves 17. The guide posts 18 correspond one-to-one with the guide grooves 16 and are guided and engaged. The pressure ring 12 has an annular groove 19 at the end away from the pressing sleeve 13. A sealing ring 14 is provided in the annular groove 19 and is tightly connected to the ball valve body 2.

[0029] Installation method and operating principle: After laying the ball valve body 2 horizontally, insert it into the ball cavity of the valve seat 1 from one end of the second flange 9. Then rotate the ball valve body 2 so that the square holes 24 at both ends correspond to the first cylinder 3 and the second cylinder 4 respectively. Pass the valve stem 6 through the first cylinder 3 and insert it into the square hole 24 at the top of the ball valve body 2. Insert the shaft 7 into the second cylinder 4 and insert it into the square hole 24 at the bottom of the ball valve body 2. At the same time, connect the bottom cover 21 to the second cylinder 4 with bolts. Place the sealing ring 14 into the annular groove 19 of the pressure ring 12, then place the springs 20 into the first spring grooves 15 of the pressure ring 12, and simultaneously insert the outer ends of each spring 20 into the second spring grooves 17 of the pressing sleeve 13. Connect the guide post 18 of the pressing sleeve 13 to the guide groove 16 of the pressure ring 12. At this time, due to the elastic force of the springs 20, a gap is left between the pressure ring 12 and the pressing sleeve 13. Then, insert the pressure ring 12 into the first groove 10 from one end of the first flange 8, and insert the pressing sleeve 13 into the second groove 11 until the pressure ring 12 abuts against the inner end of the first groove 10. Finally, fasten the pressing sleeve 13 to the first flange 8 of the valve seat 1 with bolts. At this time, the sealing ring 14 is tightly connected to the ball valve body 2, and the installation is completed. Before use, the valve stem is connected to the first cylinder 3 via a bracket. The output shaft of the electric actuator is connected to the top of the valve stem 6 via a coupling. The electric actuator drives the valve stem 6 to rotate, and the valve stem 6 drives the ball valve body 2 to rotate. The opening and closing of the entire V-type ball valve is achieved by the rotation of the V-groove. This utility model has a reasonable structure. The valve seat 1 has a first groove 10 and a second groove 11 inside and at one end of the first flange 8. The pressure ring 12 is movably disposed in the first groove 10. Several springs 20 are disposed between the pressure ring 12 and the pressing sleeve 13 and are guided by the guide post 18. A sealing ring 14 is disposed in the annular groove 19 on the inner side of the pressure ring 12. The springs 20 cause the pressure ring 12 to be subjected to a force pointing towards the ball valve body 2. The sealing ring 14 can tightly press the surface of the ball valve body 2, greatly improving the sealing performance. In addition, the sealing ring 14 solves the problem of reduced lifespan caused by long-term friction between the ball valve body 2 and the valve seat 1. At the same time, the pressure spring is pressed by the pressing sleeve 13, which is connected to the valve seat 1 by bolts, so as to facilitate the replacement of the sealing ring 14 and greatly improve the convenience.

[0030] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

[0031] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications and equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A V-type ball valve having a good sealing property, characterized by: Includes valve seat (1), ball valve body (2) and sealing assembly; A ball cavity is provided at the center of the valve seat (1), and the ball valve body (2) is rotatably disposed in the ball cavity. A first cylinder (3) is provided at the top of the valve seat (1), and a second cylinder (4) is provided coaxially with the first cylinder (3) at the bottom of the valve seat (1). A V-groove (5) is provided on the ball valve body (2). A valve stem (6) is connected to the top of the ball valve body (2), and a shaft (7) is connected to the bottom of the ball valve body (2). The valve stem (6) is rotatably disposed in the first cylinder (3), and the shaft (7) is rotatably disposed in the second cylinder (4). A first flange (8) and a second flange (9) are provided at both ends of the valve seat (1). A first groove (10) and a second groove (11) are continuously provided on the inner wall of the valve seat (1) at one end of the first flange (8). The sealing assembly includes a pressure ring (12), a pressing sleeve (13), and a sealing ring (14). The pressure ring (12) is movably disposed in a first groove (10), and the pressing sleeve (13) is disposed in a second groove (11). The pressure ring (12) has several first spring grooves (15) and guide grooves (16) at one end near the pressing sleeve (13), and the pressing sleeve (13) has several second spring grooves (17) and guide posts (18) at one end near the pressure ring (12). Spring groove (15) and second spring groove (17) correspond one-to-one and spring (20) is provided inside. The two ends of the spring (20) are respectively supported in the first spring groove (15) and the second spring groove (17). The guide post (18) corresponds one-to-one with the guide groove (16) and guides and cooperates. The pressure ring (12) has an annular groove (19) at the end away from the pressure sleeve (13). A sealing ring (14) is provided in the annular groove (19). The sealing ring (14) is tightly connected to the ball valve body (2).

2. The V-type ball valve with good sealing according to claim 1, characterized in that: The bottom of the second cylinder (4) is provided with a bottom cover (21) by bolts. The bottom cover (21) is provided with a protrusion (22), which is supported on the bottom of the shaft (7).

3. The V-type ball valve with good sealing according to claim 1, characterized in that: The first cylinder (3) is provided with packing (23), and the valve stem (6) is in close contact with the packing (23).

4. The V-type ball valve with good sealing according to claim 1, characterized in that: The ball valve body (2) has square holes (24) at the center of both the top and bottom ends. The bottom end of the valve stem (6) is inserted into the square hole (24) at the top end of the ball valve body (2), and the top end of the shaft (7) is inserted into the square hole (24) at the bottom end of the ball valve body (2).

5. The V-type ball valve with good sealing according to claim 1, characterized in that: The pressing sleeve (13) has several countersunk holes (25), and the countersunk holes (25) of the pressing sleeve (13) are fastened to the first flange (8) of the valve seat (1) by bolts.

6. The V-type ball valve with good sealing according to claim 1, characterized in that: The length of the first groove (10) along the axial direction is greater than the thickness of the pressure ring (12).

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