Ball valve sealing structure and ball valve

Abstract

The ball valve sealing structure comprises a valve body and a valve seat installed in the valve body, a valve rod is installed on the valve body, a ball body in sealing fit with the valve seat is arranged on the valve rod in a hinged mode, a sealing ring is arranged between the valve seat and the ball body, the sealing ring is arranged on the valve seat in a sliding mode, and the valve seat is arranged on the valve rod. An elastic part is clamped between the sealing ring and the valve seat, a sliding assembly is installed on the valve seat and comprises a positioning panel and an elastic element, the positioning panel is arranged on one side of the sealing ring in a sliding mode, and the elastic element is clamped between the positioning panel and the valve seat. According to the ball valve sealing structure and the ball valve, the sealing ring can be rapidly replaced and detached, and the replacement efficiency of operators is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a ball valve sealing structure and a ball valve. Background Art

[0002] A ball valve is a valve in which the opening and closing member (ball) is driven by a valve stem and rotates around the axis of the ball valve. It can be used for regulating and controlling fluids. In the prior art, a common ball valve sealing structure is that a sealing ring is embedded in a supporting ring, and the supporting ring is fixed to the valve cover by bolts. This traditional sealing form has great shortcomings. If the seal is slightly worn, the sealing ring and the ball will no longer be in contact, resulting in sealing failure, resulting in a high probability of replacing the sealing ring. In addition, the ball, valve cover, valve stem and other related structures need to be disassembled in order to maintain and replace the sealing ring, which is very cumbersome. Utility Model Content

[0003] The utility model aims to provide a ball valve sealing structure and a ball valve, which can quickly replace and disassemble the sealing ring and improve the replacement efficiency of operators.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a ball valve sealing structure and a ball valve, comprising a valve body and a valve seat installed in the valve body, a valve stem is installed on the valve body, a ball is hingedly provided on the valve stem to form a sealing fit with the valve seat, a sealing ring is provided between the valve seat and the ball, the sealing ring is slidably provided on the valve seat, an elastic member is clamped between the sealing ring and the valve seat, a sliding assembly is installed on the valve seat, the sliding assembly comprises a positioning panel and an elastic element, the positioning panel is slidably provided on one side of the sealing ring, and the elastic element is clamped between the positioning panel and the valve seat.

[0005] Preferably, the valve seat is provided with a plurality of first mounting holes arranged in a circular array, the valve body is provided with corresponding second mounting holes, the first mounting holes are provided with fasteners, and the fasteners sequentially pass through the first mounting holes and are screwed into the second mounting holes.

[0006] Preferably, a telescopic groove is provided on the valve seat, and an elastic member, a slider and a sealing ring are sequentially arranged in the telescopic groove. The elastic member is tightly arranged in the telescopic groove, and the slider is clamped between the elastic member and the sealing ring. One end of the sealing ring is in contact with the slider and the other end is tightly arranged on the ball.

[0007] Preferably, a plurality of positioning flanges are provided on the sliding block in a ring array, the positioning flanges are extended toward one side of the elastic member, and one end of the elastic member is sleeved on the positioning flange.

[0008] Preferably, a plurality of sealing flanges are arranged on the side of the sealing ring facing the sphere, one end of the sealing flange is connected to the sealing ring, and the other end protrudes toward the side of the sphere, and the sealing flange is arranged in a semicircular shape.

[0009] Preferably, the valve seat is provided with a giveway groove on one side of the elastic member, a slide groove is provided on one side of the giveway groove, a positioning portion and an extended support leg are provided on the positioning panel, an elastic element is tightly arranged between the positioning portion and the giveway groove, one end of the extended support leg is connected to the positioning portion, and the other end is slidably arranged in the slide groove.

[0010] Preferably, the extended leg is provided with a clearance hole, the valve seat is provided with a positioning hole, the clearance hole is provided with a screw, and the screw is installed in the clearance hole and tightened on the positioning hole.

[0011] Compared with the prior art, the beneficial effects of the utility model are: the sealing ring achieves flexible sealing with the ball through the elastic piece on one side of the slider, thereby reducing the sealing wear between the sealing ring and the ball and improving the service life of the sealing ring; and when the sealing ring meets the replacement requirements, the positioning panel is slid toward the side away from the ball to remove and replace the sealing ring; after completing the replacement operation, it is only necessary to loosen the positioning panel and use the elastic element to reset it; at the same time, screws for limiting the positioning panel are provided on the extended support feet to prevent the positioning panel from abutting against the ball, thereby causing scratches and damage to the ball; the overall structure realizes rapid replacement and disassembly of the sealing ring, greatly improving the replacement efficiency of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is an enlarged view of part A of the present utility model.

[0014] In the figure: 1. valve body; 2. valve seat; 3. valve stem; 4. ball; 5. sealing ring; 8. elastic member; 9. sliding assembly; 10. positioning panel; 11. elastic element; 12. first mounting hole; 13. second mounting hole; 14. fastener; 15. telescopic slot; 17. slider; 19. positioning flange; 20. sealing flange; 21. clearance slot; 23. slide slot; 24. positioning part; 25. extension leg; 27. clearance through hole; 28. positioning hole; 29. ​​screw. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] Example: As attached Figures 1-2 A ball valve sealing structure and a ball valve shown in the figure include a valve body 1 and a valve seat 2 installed in the valve body 1, a valve stem 3 is installed on the valve body 1, a ball 4 is hingedly arranged on the valve stem 3 to form a sealing match with the valve seat 2, a sealing ring 5 (made of rubber) is arranged between the valve seat 2 and the ball 4, the sealing ring 5 is slidably arranged on the valve seat 2, an elastic member 8 (specifically a compression spring) is sandwiched between the sealing ring 5 and the valve seat 2, a sliding assembly 9 is installed on the valve seat 2, the sliding assembly 9 includes a positioning panel 10 and an elastic element 11 (specifically a spring), the positioning panel 10 is slidably arranged on one side of the sealing ring 5, and the elastic element 11 is sandwiched between the positioning panel 10 and the valve seat 2, so as to seal The ring 5 achieves flexible sealing with the sphere 4 through the elastic member 8 on one side of the slider 17, thereby reducing the sealing wear between the sealing ring 5 and the sphere 4 and improving the service life of the sealing ring 5. When the sealing ring 5 meets the replacement requirements, the positioning panel 10 is slid toward the side away from the sphere 4 to remove and replace the sealing ring 5. After the replacement operation is completed, it is only necessary to loosen the positioning panel 10 and use the elastic element 11 to reset it. At the same time, the extended support foot 25 is provided with a screw 29 for limiting the positioning panel 10 to prevent the positioning panel 10 from abutting against the sphere 4, thereby causing scratches and damage to the sphere 4. The overall structure realizes rapid replacement and disassembly of the sealing ring 5, greatly improving the replacement efficiency of the operator.

[0017] As attached Figure 2 As shown, the valve seat 2 is provided with a plurality of first mounting holes 12 arranged in a circular array, the valve body 1 is provided with corresponding second mounting holes 13, the first mounting holes 12 are provided with fasteners 14 (specifically bolts), the fasteners 14 pass through the first mounting holes 12 in sequence and are tightened in the second mounting holes 13. The overall structure is simple, the installation is portable, and it is convenient for later maintenance and disassembly.

[0018] As attached Figure 2As shown, a telescopic groove 15 is provided on the valve seat 2, and an elastic member 8, a slider 17 and a sealing ring 5 are sequentially arranged in the telescopic groove 15. The elastic member 8 is tightly arranged in the telescopic groove 15, and the slider 17 is clamped between the elastic member 8 and the sealing ring 5. One end of the sealing ring 5 is in contact with the slider 17 and the other end is tightly pressed against the ball 4, which can reduce the sealing wear between the sealing ring 5 and the ball 4 and achieve flexible sealing with good sealing performance.

[0019] As attached Figure 2 As shown, a plurality of positioning flanges 19 (an integrated structure) are arranged in a circular array on the slider 17. The positioning flange 19 is extended toward one side of the elastic member 8. One end of the elastic member 8 is sleeved on the positioning flange 19. The positioning flange 19 is arranged to stabilize the contraction and recovery of the elastic member 8 to prevent the elastic member 8 from twisting and deformation during operation.

[0020] As attached Figure 2 As shown, the sealing ring 5 is provided with a plurality of sealing flanges 20 (an integrated structure) on the side facing the sphere 4. One end of the sealing flange 20 is connected to the sealing ring 5, and the other end protrudes toward the side of the sphere 4. The sealing flange 20 is provided in a semicircular shape. The provision of a plurality of sealing flanges 20 can achieve a multi-stage sealing effect with the sphere 4, thereby enhancing the sealing effect of the sealing ring 5.

[0021] As attached Figure 2 As shown, the valve seat 2 is provided with a give way groove 21 on one side of the elastic member 8, and a slide groove 23 is provided on one side of the give way groove 21. The positioning panel 10 is provided with a positioning portion 24 and an extension leg 25 (an integrated structure), and an elastic element 11 is tightly arranged between the positioning portion 24 and the give way groove 21. One end of the extension leg 25 is connected to the positioning portion 24, and the other end is slidably arranged in the slide groove 23. The positioning panel 10 forms a sliding fit with the valve seat 2 through the elastic element 11, and is connected to the valve seat 2 to realize the telescopic groove 15 for sliding fit of the sealing ring 5, the slider 17 and the elastic member 8, which is convenient for the later replacement and disassembly of the sealing ring 5, the slider 17 and the elastic member 8.

[0022] As attached Figure 2 As shown, the extended leg is provided with a clearance hole 27, and the valve seat 2 is provided with a positioning hole 28. A screw 29 is installed on the clearance hole 27. The screw 29 is installed in the clearance hole 27 and tightened on the positioning hole 28. The screw 29 is used to limit and fix the positioning panel 10, so as to control the sliding stroke of the positioning panel 10 and avoid the positioning panel 10 from abutting or colliding with the ball 4.

[0023] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention, and do not specifically refer to any part or element in the present invention and cannot be understood as limitations on the present invention.

Claims

1. A ball valve sealing structure and a ball valve, comprising a valve body (1) and a valve seat (2) installed in the valve body (1), a valve stem (3) installed on the valve body (1), a ball (4) hingedly provided on the valve stem (3) to form a sealing fit with the valve seat (2), characterized in that; A sealing ring (5) is arranged between the valve seat (2) and the ball (4); the sealing ring (5) is slidably arranged on the valve seat (2); an elastic member (8) is clamped between the sealing ring (5) and the valve seat (2); a sliding assembly (9) is installed on the valve seat (2); the sliding assembly (9) comprises a positioning panel (10) and an elastic element (11); the positioning panel (10) is slidably arranged on one side of the sealing ring (5); and the elastic element (11) is clamped between the positioning panel (10) and the valve seat (2).

2. A ball valve sealing structure and a ball valve according to claim 1, characterized in that: The valve seat (2) is provided with a plurality of first mounting holes (12) arranged in a ring array, the valve body (1) is provided with corresponding second mounting holes (13), the first mounting holes (12) are provided with fasteners (14), and the fasteners (14) pass through the first mounting holes (12) in sequence and are screwed into the second mounting holes (13).

3. A ball valve sealing structure and a ball valve according to claim 1, characterized in that: The valve seat (2) is provided with a telescopic groove (15), and an elastic member (8), a slider (17) and a sealing ring (5) are sequentially arranged in the telescopic groove (15); the elastic member (8) is tightly arranged in the telescopic groove (15), and the slider (17) is clamped between the elastic member (8) and the sealing ring (5); one end of the sealing ring (5) is in contact with the slider (17) and the other end is tightly arranged on the ball (4).

4. A ball valve sealing structure and a ball valve according to claim 3, characterized in that: The slider (17) is provided with a plurality of positioning flanges (19) in an annular array. The positioning flanges (19) are extended toward one side of the elastic member (8), and one end of the elastic member (8) is sleeved on the positioning flange (19).

5. A ball valve sealing structure and a ball valve according to claim 4, characterized in that: A plurality of sealing flanges (20) are arranged on the side of the sealing ring (5) facing the spherical body (4); one end of the sealing flange (20) is connected to the sealing ring (5) and the other end protrudes toward the side of the spherical body (4); and the sealing flange (20) is arranged in a semicircular shape.

6. A ball valve sealing structure and a ball valve according to claim 1, characterized in that: The valve seat (2) is provided with a clearance groove (21) on one side of the elastic member (8), and a slide groove (23) is provided on one side of the clearance groove (21). A positioning portion (24) and an extended support leg (25) are provided on the positioning panel (10), and an elastic element (11) is tightly arranged between the positioning portion (24) and the clearance groove (21), and one end of the extended support leg (25) is connected to the positioning portion (24), and the other end is slidably arranged in the slide groove (23).

7. A ball valve sealing structure and a ball valve according to claim 6, characterized in that: The extended support leg is provided with a clearance hole (27), the valve seat (2) is provided with a positioning hole (28), a screw (29) is installed on the clearance hole (27), and the screw (29) is installed in the clearance hole (27) and tightened on the positioning hole (28).

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