Hard sealing high-performance ball valve seat

Abstract

The utility model discloses a hard sealing high-performance ball valve seat which comprises a valve seat body, a mounting groove, an elastic sealing block, a hard contact section, a side open groove, an air guide sealing unit, an air guide recess and an internal channel. The ball valve has the following advantages and effects that the hard contact sections on the elastic sealing blocks and the ball body can form stable sealing, and the hard contact sections have wear-resistant characteristics, so that wear under long-term working conditions can be effectively avoided; the air guide sealing unit can introduce air into the air guide recess through the internal channel, so that the elastic sealing block is expanded, the hard contact section is tightly attached to the ball body, the air guide sealing unit can also prevent the air introduced into the air guide recess from leaking, and then it is guaranteed that the elastic sealing block is in an expanded state.

Description

Technical Field

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

[0002] The working principle of the ball valve is to use a driving device to apply a certain torque to the upper end of the valve stem and transmit it to the ball, so that it rotates 90 degrees to complete the action of opening or closing the valve; the sealing of the ball valve is generally achieved through the ball and the valve seat. The existing valve seat has the following defects: ① The contact surface between the valve seat and the ball is prone to wear under long-term working conditions, causing the seal between the two to fail; ② The contact between the valve seat and the ball will produce a gap under long-term working conditions, affecting the actual sealing effect. Utility Model Content

[0003] The utility model aims to provide a hard-sealed high-performance ball valve seat to solve the problems raised in the background technology.

[0004] The above technical objectives of the utility model are achieved through the following technical solutions:

[0005] A hard-sealed high-performance ball valve seat, comprising a valve seat body, wherein two mounting grooves are provided on a side of the valve seat body close to the ball, the two mounting grooves respectively corresponding to the upper part and the lower part of the ball, elastic sealing blocks are fixedly arranged in the two mounting grooves, and a wear-resistant hard contact section is fixedly arranged on the side of the elastic sealing block facing the ball;

[0006] Two side grooves are provided on the left side of the valve seat body, and the two side grooves correspond to the positions of the two installation grooves respectively, and air-guiding sealing units are arranged in the two side grooves; an air-guiding recess is provided in the area of ​​the elastic sealing block away from the sphere, and an internal channel connecting the air-guiding sealing unit and the air-guiding recess is provided inside the valve seat body; the air-guiding sealing unit can introduce gas into the air-guiding recess through the internal channel, so that the elastic sealing block expands and the hard contact section is tightly attached to the sphere, and the air-guiding sealing unit can also prevent the gas introduced into the air-guiding recess from leaking.

[0007] A further configuration is that the cross-sectional shape of the air guide recess is a sector.

[0008] Further configuration is: the air-guiding sealing unit includes a base fixed at the bottom of the side groove, the left side of the side groove is a groove and a cover plate is fixedly arranged, an inner cavity is formed between the cover plate and the base, and a sliding block is slidably arranged in the inner cavity; a transverse through hole is opened in the cover plate, a transverse pull plate is fixedly arranged on the left side of the sliding block, the transverse pull plate passes through the through hole to the left and extends to the outside of the valve seat body; one end of the transverse pull plate is in contact with the inner wall of the through hole, and an air-guiding block is filled between the other end of the transverse pull plate and the inner wall of the through hole, and the air-guiding block is fixed on the cover plate.

[0009] Further configuration is: a large spring is compressed and arranged between the sliding block and the base, and the sliding block maintains a tendency to move to the left based on the push of the large spring; a flexible gasket is fixedly arranged on the right side of the cover plate, and the sliding block will resist the flexible gasket under the push of the large spring; a spacing area is provided between the air guide block and the sliding block, and when the sliding block resists the flexible gasket, the spacing area still exists, and the spacing area remains connected with the air guide block; a transversely penetrating inner hole is provided in the sliding block, and an upper air guide area is provided between the sliding block and the base, and the inner hole, the upper air guide area and the internal channel are connected in sequence.

[0010] A further configuration is that: corresponding first limit grooves and second limit grooves are respectively provided on the left side of the base and the right side of the sliding block, an inner baffle is provided between the first limit groove and the second limit groove, a small spring is provided in the first limit groove, the right side of the inner baffle extends into the first limit groove and contacts with the small spring, and the left side of the inner baffle is kept against the bottom of the second limit groove under the push of the small spring; the inner baffle divides the area between the sliding block and the base into a lower sealing area and the upper air guide area, and the large spring is located in the lower sealing area.

[0011] A further configuration is that an embedding protrusion is fixedly provided on the left side of the sliding block, an embedding recess adapted to the embedding protrusion is provided on the right side of the flexible gasket, and the cross-sectional shape of the embedding protrusion is semicircular.

[0012] The beneficial effects of the utility model are:

[0013] 1. In the utility model, the elastic sealing block is installed by setting the installation groove, and the hard contact section on the elastic sealing block can form a stable seal with the sphere; and the hard contact section has wear-resistant characteristics, which can effectively avoid wear under long-term working conditions; at the same time, the air guide sealing unit is installed by setting the side groove, and the air guide sealing unit can pass gas into the air guide recess through the internal channel, so that the elastic sealing block is expanded, allowing the hard contact section to fit tightly with the sphere, and the air guide sealing unit can also prevent the gas introduced into the air guide recess from leaking, thereby ensuring that the elastic sealing block is in an expanded state.

[0014] 2. In the utility model, the cover plate can close the notch of the side slot, and the inner cavity formed between the cover plate and the base is for placing the sliding block; a horizontal pull plate is arranged on the left side of the sliding block, and an air guide block is fixedly arranged between the horizontal pull plate and the inner wall of the through hole, and the air guide block can be connected to an external air pump to introduce gas; the gas introduced from the air guide block can be introduced into the spacing area, and then push the sliding block to move right, and then gradually pass through the space between the sliding block and the flexible gasket, and then pass through the inner hole, the upper air guide area, and the internal channel into the air guide depression.

[0015] 3. In the utility model, the setting of the large spring can achieve rapid reset. After the ventilation is completed, the sliding block will be pushed against the flexible gasket by the large spring, thereby squeezing the space between the sliding block and the flexible gasket to eliminate the purpose of cutting off the inner hole and avoiding gas leakage into the gas guide recess.

[0016] 4. In the utility model, the first limit groove and the second limit groove are used to install the inner baffle plate and the small spring. The inner baffle plate will remain against the bottom of the second limit groove under the push of the small spring, so that the area between the sliding block and the base can be divided into a lower sealing area and an upper air guiding area. The upper air guiding area is connected to the internal channel for air guiding, and the lower sealing area is separated from the upper air guiding area, thereby preventing the gas in the upper air guiding area from leaking to the lower sealing area and affecting the normal movement of the sliding block.

[0017] 5. In the present invention, the sealing performance between the sliding block and the flexible gasket is further improved by the cooperation of the embedded protrusion and the embedded recess. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an embodiment;

[0019] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0020] Figure 3 for Figure 2 Enlarged view of part B in the middle.

[0021] In the figure: 11, valve seat body; 12, ball; 21, installation groove; 22, elastic sealing block; 23, hard contact section; 24, air guide depression; 25, internal channel; 31, side slot; 32, base; 33, cover plate; 34, sliding block; 41, through hole; 42, horizontal pull plate; 43, air guide block; 51, large spring; 61, flexible gasket; 71, spacer area; 72, inner hole; 73, upper air guide area; 74, lower sealing area; 81, first limiting groove; 82, second limiting groove; 83, inner baffle; 84, small spring; 91, embedded protrusion; 92, embedded depression. DETAILED DESCRIPTION

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0023] As attached Figures 1 to 3 As shown;

[0024] The present embodiment discloses a hard-sealed high-performance ball valve seat, comprising a valve seat body 11, wherein two mounting grooves 21 are provided on one side of the valve seat body 11 close to the ball 12, wherein the two mounting grooves 21 correspond to the upper part and the lower part of the ball 12 respectively, wherein elastic sealing blocks 22 are fixedly arranged in the two mounting grooves 21, and a wear-resistant hard contact section 23 is fixedly arranged on the side of the elastic sealing block 22 facing the ball 12;

[0025] Two side grooves 31 are provided on the left side of the valve seat body 11, and the two side grooves 31 correspond to the positions of the two installation grooves 21 respectively, and air-guiding sealing units are arranged in the two side grooves 31; an air-guiding recess 24 is provided in the area of ​​the elastic sealing block 22 away from the spherical body 12, and an internal channel 25 connecting the air-guiding sealing unit and the air-guiding recess 24 is provided inside the valve seat body 11. The air-guiding sealing unit can pass gas into the air-guiding recess 24 through the internal channel 25, so that the elastic sealing block 22 expands, allowing the hard contact section 23 to be tightly attached to the spherical body 12, and the air-guiding sealing unit can also prevent the gas passed into the air-guiding recess 24 from leaking.

[0026] The cross-sectional shape of the air guiding recess 24 is a sector.

[0027] Among them, the air-guiding sealing unit includes a base 32 fixed at the bottom of the side groove 31, the left side of the side groove 31 is a groove and a cover plate 33 is fixedly arranged, an inner cavity is formed between the cover plate 33 and the base 32, and a sliding block 34 is slidably arranged in the inner cavity; a transverse through hole 41 is opened in the cover plate 33, and a transverse pull plate 42 is fixedly arranged on the left side of the sliding block 34, and the transverse pull plate 42 passes through the through hole 41 to the left and extends to the outside of the valve seat body 11; one end of the transverse pull plate 42 is in contact with the inner wall of the through hole 41, and an air-guiding block 43 is filled between the other end of the transverse pull plate 42 and the inner wall of the through hole 41, and the air-guiding block 43 is fixed on the cover plate 33.

[0028] Among them, a large spring 51 is compressed and arranged between the sliding block 34 and the base 32. Based on the push of the large spring 51, the sliding block 34 maintains a tendency to move to the left. A flexible gasket 61 is fixedly arranged on the right side of the cover plate 33. The sliding block 34 will be against the flexible gasket 61 under the push of the large spring 51; there is a spacing area 71 between the air guide block 43 and the sliding block 34, and when the sliding block 34 is against the flexible gasket 61, the spacing area 71 still exists, and the spacing area 71 and the air guide block 43 remain connected; a transversely penetrating inner hole 72 is opened in the sliding block 34, and an upper air guide area 73 is provided between the sliding block 34 and the base 32, and the inner hole 72, the upper air guide area 73 and the internal channel 25 are connected in sequence.

[0029] Among them, the left side of the base 32 and the right side of the sliding block 34 are respectively provided with corresponding first limiting grooves 81 and second limiting grooves 82, an inner baffle plate 83 is arranged between the first limiting groove 81 and the second limiting groove 82, a small spring 84 is arranged in the first limiting groove 81, the right side of the inner baffle plate 83 extends into the first limiting groove 81 and contacts with the small spring 84, and the left side of the inner baffle plate 83 is kept against the bottom of the second limiting groove 82 under the push of the small spring 84; the inner baffle plate 83 divides the area between the sliding block 34 and the base 32 into a lower sealing area 74 and the upper air guide area 73, and the large spring 51 is located in the lower sealing area 74.

[0030] An embedding protrusion 91 is fixedly provided on the left side of the sliding block 34 , and an embedding recess 92 adapted to the embedding protrusion 91 is provided on the right side of the flexible gasket 61 . The cross-sectional shape of the embedding protrusion 91 is semicircular.

[0031] The working principle of this embodiment is:

[0032] When the sealing performance between the valve seat body 11 and the ball 12 deteriorates, gas is introduced through the gas guide block 43, and the introduced gas can enter the spacer area 71, and then push the sliding block 34 to move right, and then gradually pass through the space between the sliding block 34 and the flexible gasket 61, and enter the gas guide recess 24 after passing through the inner hole 72, the upper gas guide area 73, and the internal channel 25, so that the elastic sealing block 22 is expanded, and the hard contact section 23 is closely attached to the ball 12, thereby enhancing the sealing performance. After the ventilation is completed, the sliding block 34 will be pushed by the large spring 51 to abut against the flexible gasket 61, thereby squeezing the space between the sliding block 34 and the flexible gasket 61 to disappear, so as to achieve the purpose of cutting off the inner hole 72, avoiding the leakage of the gas introduced into the gas guide recess 24, and thus ensuring that the elastic sealing block 22 is in an expanded state.

[0033] It should be noted that the transverse pull plate 42 in this embodiment passes through the through hole 41 to the left and extends to the outside of the valve seat body 11. By applying internal pressure, the transverse pull plate 42 can open the space between the sliding block 34 and the flexible gasket 61 to achieve manual exhaust.

[0034] It should be noted that the elastic sealing block 22 in this embodiment is made of rubber, and the hard contact section 23 is made of ceramic.

[0035] 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 hard-sealed high-performance ball valve seat, comprising a valve seat body (11), Features: The valve seat body (11) is provided with two installation grooves (21) on one side close to the ball (12), the two installation grooves (21) respectively corresponding to the upper part and the lower part of the ball (12), the two installation grooves (21) are fixedly provided with elastic sealing blocks (22), and the elastic sealing blocks (22) are fixedly provided with a wear-resistant hard contact section (23) on the side facing the ball (12); The valve seat body (11) is provided with two side grooves (31) on the left side, the two side grooves (31) respectively corresponding to the positions of the two mounting grooves (21), and an air guide sealing unit is arranged in each of the two side grooves (31); an air guide recess (24) is arranged in the area of ​​the elastic sealing block (22) away from the spherical body (12), and an internal channel (25) is arranged inside the valve seat body (11) to connect the air guide sealing unit and the air guide recess (24); the air guide sealing unit can pass gas into the air guide recess (24) through the internal channel (25), so that the elastic sealing block (22) expands, allowing the hard contact section (23) to be tightly attached to the spherical body (12), and the air guide sealing unit can also prevent the gas passed into the air guide recess (24) from leaking.

2. A hard-sealed high-performance ball valve seat according to claim 1, Features: The cross-sectional shape of the air guiding recess (24) is fan-shaped.

3. A hard-sealed high-performance ball valve seat according to claim 1, Features: The air guide sealing unit comprises a base (32) fixed to the bottom of the side groove (31); the left side of the side groove (31) is a groove and a cover plate (33) is fixedly arranged thereon; an inner cavity is formed between the cover plate (33) and the base (32); a sliding block (34) is slidably arranged in the inner cavity; a transverse through hole (41) is formed in the cover plate (33); a transverse pull plate (42) is fixedly arranged on the left side of the sliding block (34); the transverse pull plate (42) passes through the through hole (41) to the left and extends to the outside of the valve seat body (11); one end of the transverse pull plate (42) is in contact with the inner wall of the through hole (41); an air guide block (43) is filled between the other end of the transverse pull plate (42) and the inner wall of the through hole (41); the air guide block (43) is fixed on the cover plate (33).

4. A hard-sealed high-performance ball valve seat according to claim 3, Features: A large spring (51) is compressed between the sliding block (34) and the base (32). Based on the push of the large spring (51), the sliding block (34) maintains a tendency to move leftward. A flexible gasket (61) is fixedly arranged on the right side of the cover plate (33). The sliding block (34) will abut against the flexible gasket (61) under the push of the large spring (51). A spacing area (71) is provided between the air guide block (43) and the sliding block (34). When the sliding block (34) abuts against the flexible gasket (61), the spacing area (71) still exists, and the spacing area (71) and the air guide block (43) remain in communication. A transversely penetrating inner hole (72) is provided in the sliding block (34). An upper air guide area (73) is provided between the sliding block (34) and the base (32). The inner hole (72), the upper air guide area (73) and the internal channel (25) are in communication with each other in sequence.

5. A hard-sealed high-performance ball valve seat according to claim 4, Features: The left side of the base (32) and the right side of the sliding block (34) are respectively provided with a corresponding first limiting groove (81) and a second limiting groove (82); an inner baffle plate (83) is arranged between the first limiting groove (81) and the second limiting groove (82); a small spring (84) is arranged in the first limiting groove (81); the right side of the inner baffle plate (83) extends into the first limiting groove (81) and contacts with the small spring (84); the left side of the inner baffle plate (83) is kept against the bottom of the second limiting groove (82) under the push of the small spring (84); the inner baffle plate (83) divides the area between the sliding block (34) and the base (32) into a lower sealing area (74) and the upper air guide area (73); the large spring (51) is located in the lower sealing area (74).

6. A hard-sealed high-performance ball valve seat according to claim 4, Features: An embedding protrusion (91) is fixedly provided on the left side of the sliding block (34), and an embedding recess (92) adapted to the embedding protrusion (91) is provided on the right side of the flexible gasket (61), and the cross-sectional shape of the embedding protrusion (91) is semicircular.

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