Anti-deformation structure of ball valve

Abstract

The utility model relates to the field of ball valves, in particular to a ball valve anti-deformation structure which comprises a left valve body, a sealing ring, a ball body, a spiral wound gasket, a full-thread stud, a first hexagon nut and a right valve body. A right valve body is symmetrically arranged on one side of the left valve body, a ball body is installed between the right valve body and the left valve body, and sealing rings are arranged at the joints of the ball body and the left valve body and the right valve body; the ball body is installed inside the valve body, the cylindrical pin penetrates through the second packing and the valve body to be in contact with the ball body, the gland is connected with the valve body through threads and tightly presses the second packing to guarantee sealing, and the vertical position of the cylindrical pin is adjusted through threads of the inner hexagonal flat-end set screw to enable the cylindrical pin to be in contact with the ball body. After adjustment is completed, the second hexagon nut is used for limiting and locking, the cylindrical pin supports the ball body, the situation that the ball body moves downwards due to the gravity to cause plastic deformation of the sealing ring and affect the sealing performance is avoided, abrasion and damage caused by deformation of the ball valve can be reduced, the service life of the ball valve is prolonged, and replacement and maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to ball valve field especially relates to a ball valve anti -deformation structure. BACKGROUND

[0002] Ball valve is a kind of valve that controls fluid on-off by rotating ball, and the movement of floating ball valve mainly depends on its unique structure design, and the ball core is clamped by two valve seat sealing rings, when valve stem is rotated, it drives the ball core to rotate 90 degrees, realizes the switching action of ball valve, and the ball of floating ball valve is not supported by shaft, and is only supported by two valve seats.

[0003] The existing ball valve may be deformed due to external force impact, vibration or excessive pressure during use, and even be broken, so the sealing performance between ball and valve seat may be affected, fluid may leak out from the sealing surface, and deformation may also cause valve seat sealing ring damage or aging, affecting the service life of ball valve.

[0004] Therefore, in view of the above-mentioned problems that the existing ball valve may be deformed due to external force, fluid may leak out from the sealing surface, and deformation may also cause valve seat sealing ring damage or aging, affecting the service life of ball valve, a ball valve anti-deformation structure can be designed, which is provided with an anti-deformation structure on the ball valve to prolong the service life of the ball valve. UTILITY MODEL CONTENTS

[0005] In order to overcome the problems that the existing ball valve may be deformed due to external force, fluid may leak out from the sealing surface, and deformation may also cause valve seat sealing ring damage or aging, affecting the service life of ball valve.

[0006] The utility model discloses a ball valve anti-deformation structure, including left valve body, sealing ring, ball, winding gasket, full thread stud, first hexagon nut and right valve body, the left valve body one side symmetry is equipped with right valve body, and the right valve body is installed with ball between left valve body, and the ball is equipped with sealing ring in the junction of left valve body and right valve body, the ball is equipped with winding gasket outside, and the right valve body is equipped with multiple full thread studs around the junction of right valve body and ball, and the full thread stud is equipped with first hexagon nut outside, the ball lower middle part is equipped with the vertical cylinder pin, and the cylinder pin is equipped with second packing outside, the second packing lower part is equipped with gland, and the gland middle part is equipped with the vertical inner hexagonal flat end set screw that is connected with cylinder pin, and the inner hexagonal flat end set screw is equipped with second hexagon nut outside.

[0007] Preferably, the ball is installed inside the valve body, the cylindrical pin passes through the second packing and the valve body and contacts the ball, the gland is connected with the valve body through threads and presses the second packing to ensure sealing, the up and down positions of the cylindrical pin are adjusted through the threads of the hexagonal flat end set screw so that the cylindrical pin just contacts the ball, after the adjustment is completed, the second hexagonal nut is used for limiting and locking, the ball is supported by the cylindrical pin, the plastic deformation of the sealing ring caused by the downward movement of the ball due to its own gravity is prevented, and the sealing performance is affected.

[0008] Preferably, a valve rod is vertically arranged at the upper middle part of the ball, a thrust washer is arranged outside the valve rod, a first packing is arranged above the thrust washer, and a packing gland is arranged above the first packing.

[0009] Preferably, a limiting plate is arranged above the packing gland, and a first hexagonal cylindrical head screw is vertically arranged at one side of the packing gland.

[0010] Preferably, a lever sleeve is arranged above the limiting plate, a lever is transversely arranged at the middle part of the lever sleeve, a hexagonal head bolt is vertically arranged at the connection part of the lever and the lever sleeve, and a second hexagonal cylindrical head screw is vertically arranged at the connection part of the lever sleeve and the valve rod.

[0011] Preferably, a padlock is arranged at the side, away from the first hexagonal cylindrical head screw, of the packing gland.

[0012] Preferably, an elastic shaft baffle is arranged at the connection part of the lever sleeve and the limiting plate.

[0013] Preferably, an electrostatic spring is arranged at the connection part of the ball and the valve rod, and a steel ball is arranged at one side of the electrostatic spring.

[0014] The ball is installed inside the valve body, the cylindrical pin passes through the second packing and the valve body and contacts the ball, the gland is connected with the valve body through threads and presses the second packing to ensure sealing, the up and down positions of the cylindrical pin are adjusted through the threads of the hexagonal flat end set screw so that the cylindrical pin just contacts the ball, after the adjustment is completed, the second hexagonal nut is used for limiting and locking, the ball is supported by the cylindrical pin, the plastic deformation of the sealing ring caused by the downward movement of the ball due to its own gravity is prevented, and the sealing performance is affected, through this method, the stability and performance of the ball valve are maintained, and the wear and damage of the ball valve caused by deformation are reduced, thereby prolonging the service life of the ball valve and reducing the replacement and maintenance costs. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The overall structure schematic diagram of the anti-deformation structure is shown.

[0016] Figure 2 The overall structure schematic diagram of the anti-deformation structure is shown.

[0017] Figure 3 The anti-deformation structure is shown.Figure 2 Structure schematic diagram at middle A;

[0018] Figure 4 The anti-deformation structure of the ball valve is shown Figure 3 Structure schematic diagram at middle B.

[0019] Explanation of reference numerals: 1, left valve body; 2, sealing ring; 3, ball; 4, winding gasket; 5, full thread stud; 6, first hexagon nut; 7, right valve body; 8, valve rod; 9, thrust washer; 10, first packing; 11, packing gland; 12, limiting plate; 13, first inner hexagonal cylindrical head screw; 14, lever; 15, hexagonal head bolt; 16, second inner hexagonal cylindrical head screw; 17, lever sleeve; 18, padlock; 19, elastic retaining ring for shaft; 20, electrostatic spring; 21, steel ball; 22, second hexagon nut; 23, inner hexagonal flat end set screw; 24, gland; 25, cylindrical pin; 26, second packing. DETAILED DESCRIPTION

[0020] The utility model is further explained below in combination with the drawings and examples.

[0021] Please refer to Figures 1-4 The utility model provides an embodiment: a ball valve anti-deformation structure, including left valve body 1, sealing ring 2, ball 3, winding gasket 4, full thread stud 5, first hexagon nut 6 and right valve body 7, left valve body 1 one side symmetry is equipped with right valve body 7, and the ball 3 is installed between right valve body 7 and left valve body 1, and the ball 3 is equipped with sealing ring 2 at left valve body 1 and right valve body 7 junction, and the ball 3 is equipped with winding gasket 4 outside the sleeve, and the right valve body 7 is equipped with multiple full thread studs 5 around the wearing of ball 3 junction, and the full thread stud 5 is equipped with first hexagon nut 6 outside the sleeve, and the ball 3 lower middle part is vertically equipped with cylindrical pin 25, and the cylindrical pin 25 is equipped with second packing 26 outside the sleeve, and the second packing 26 lower part is equipped with gland 24, and the gland 24 middle part is vertically equipped with the inner hexagonal flat end set screw 23 of the adhesion connection of cylindrical pin 25, and the inner hexagonal flat end set screw 23 is equipped with second hexagon nut 22 outside the sleeve.

[0022] Please refer to Figures 3-4In this embodiment, the valve stem 8 is vertically arranged in the middle of the sphere 3, the thrust washer 9 is arranged outside the valve stem 8, the first packing 10 is arranged above the thrust washer 9, and the packing gland 11 is arranged above the first packing 10. The valve stem 8 is movably connected with the sphere 3 through the first packing 10 and the valve body, the packing gland 11 is connected with the valve body through threads and tightly presses the first packing 10 to ensure sealing, the limiting plate 12 is arranged above the packing gland 11, the first inner hexagonal cylindrical head screw 13 is vertically arranged on one side of the packing gland 11, the handle lever sleeve 17 is installed above the limiting plate 12, the handle lever 14 is transversely arranged in the middle of the handle lever sleeve 17, the hexagonal head bolt 15 is vertically arranged at the connection between the handle lever 14 and the handle lever sleeve 17, the second inner hexagonal cylindrical head screw 16 is vertically arranged at the connection between the handle lever sleeve 17 and the valve stem 8, the handle lever 14 is lifted and passed through the handle lever sleeve 17, and then is fastened by the hexagonal head bolt 15, the padlock 18 is arranged on the side of the packing gland 11 away from the first inner hexagonal cylindrical head screw 13, the padlock 18 is used to lock the position of the valve stem 8 or the valve body to prevent misoperation, the shaft elastic retainer 19 is arranged at the connection between the handle lever sleeve 17 and the limiting plate 12, the shaft elastic retainer 19 is used to fix and support the valve stem 8 or other components to prevent loosening or falling off, and the electrostatic spring 20 is arranged at the connection between the sphere 3 and the valve stem 8, the steel ball 21 is arranged on one side of the electrostatic spring 20, and the electrostatic spring 20 and the steel ball 21 can form part of an anti-static device and are used to prevent static electricity accumulation and discharge.

[0023] In operation, the sphere 3 is first installed in the left valve body 1 and the right valve body 7, the left valve body 1 and the right valve body 7 are placed in abutment, then the all-thread stud 5 is connected with the right valve body 7 through the connection between the sphere 3 and the right valve body 7, and then is fastened by the first hexagonal nut 6, in this process, the wound gasket 4 can provide additional sealing effect, then the valve stem 8 is movably connected with the sphere 3 through the first packing 10 and the valve body, the packing gland 11 is connected with the valve body through threads and tightly presses the first packing 10 to ensure sealing, and is fastened by the first inner hexagonal cylindrical head screw 13, finally the handle lever 14 is lifted and passed through the handle lever sleeve 17, and then is fastened by the hexagonal head bolt 15;

[0024] When the control part is installed, the cylindrical pin 25 is lifted and passed through the second packing 26 and the valve body and contacts the sphere 3, the gland 24 is connected with the valve body through threads and tightly presses the second packing 26 to ensure sealing, the up-and-down position of the cylindrical pin 25 is adjusted by the threads of the inner hexagonal flat end set screw 23 so that the cylindrical pin 25 just contacts the sphere 3, after the adjustment is completed, the second hexagonal nut 22 is used for limiting and locking, the sphere 3 is supported by the cylindrical pin 25, and plastic deformation of the sealing ring 2 caused by downward movement of the sphere 3 due to its own gravity is prevented, and the sealing performance is affected;

[0025] When the valve needs to be opened, the valve stem 8 is rotated by the lever 14, the valve stem 8 drives the ball 3 to rotate, the flow hole of the ball 3 is aligned with the valve passage hole, and the fluid can flow freely. When the valve needs to be closed, the valve stem 8 is rotated in the opposite direction by the lever 14, the valve stem 8 drives the ball 3 to rotate 90 degrees, the flow hole of the ball 3 is perpendicular to the valve passage hole, the ball 3 is pushed to the valve seat at the outlet end of the valve under the action of fluid pressure, and the sealing effect is achieved.

[0026] Through the above steps, the ball 3 is installed in the valve body, the cylindrical pin 25 passes through the second packing 26 and contacts the ball 3, the gland 24 is connected with the valve body by threads and compresses the second packing 26 to ensure sealing, the up and down positions of the cylindrical pin 25 are adjusted by the threads of the inner hexagonal flat end set screw 23 so that the cylindrical pin 25 is in contact with the ball 3, after the adjustment is completed, the second hexagonal nut 22 is used for limiting and locking, the cylindrical pin 25 supports the ball 3, prevents the ball 3 from moving downward due to its own gravity and causing plastic deformation of the sealing ring 2, and affects the sealing performance. Through this method, the stability and performance of the ball valve are maintained, and the wear and damage of the ball valve caused by deformation can be reduced, thereby prolonging the service life of the ball valve, reducing replacement and maintenance costs, to solve the problem that the existing ball valve may be deformed due to external force, causing fluid to leak out between the sealing surfaces, and deformation may also cause damage or aging of the valve seat sealing ring 2, affecting the service life of the ball valve.

Claims

1. A deformation-preventing structure of a ball valve, comprising a left valve body (1); characterized in that: Also include sealing ring (2), ball (3), winding gasket (4), full thread stud (5), the first hexagonal nut (6) and right valve body (7); Left valve body (1) side symmetry is equipped with right valve body (7), ball (3) is installed between right valve body (7) and left valve body (1), ball (3) is equipped with sealing ring (2) at left valve body (1) and right valve body (7) connection, ball (3) is equipped with winding gasket (4) outside, right valve body (7) is equipped with multiple groups of full thread stud (5) around the connection of ball (3), full thread stud (5) is equipped with the first hexagonal nut (6) outside, ball (3) lower middle part is vertically equipped with cylindrical pin (25), cylindrical pin (25) is equipped with second packing (26) outside, second packing (26) is equipped with gland (24) below, gland (24) middle part is vertically equipped with inner hexagonal flat end set screw (23) that is connected with cylindrical pin (25) adhesion, inner hexagonal flat end set screw (23) is equipped with second hexagonal nut (22) outside.

2. The anti-deformation structure of a ball valve according to claim 1, characterized in that: Ball (3) upper middle part is vertically equipped with valve stem (8), valve stem (8) is equipped with thrust washer (9) outside, thrust washer (9) is equipped with first packing (10) above, first packing (10) is equipped with packing gland (11) above.

3. The anti-deformation structure of a ball valve according to claim 2, characterized in that: Packing gland (11) is equipped with limit plate (12) above, packing gland (11) side is vertically equipped with first inner hexagonal cylindrical head screw (13).

4. The anti-deformation structure of a ball valve according to claim 3, characterized in that: Limit plate (12) is equipped with lever sleeve (17) above, lever sleeve (17) middle part is transversely equipped with lever (14), lever (14) and lever sleeve (17) connection part is vertically equipped with hexagonal head bolt (15), lever sleeve (17) and valve stem (8) connection part is vertically equipped with second inner hexagonal cylindrical head screw (16).

5. The anti-deformation structure of a ball valve according to claim 3, characterized in that: Packing gland (11) is equipped with padlock (18) away from first inner hexagonal cylindrical head screw (13) side.

6. The anti-deformation structure of a ball valve according to claim 4, characterized in that: Lever sleeve (17) and limit plate (12) connection part is equipped with shaft elastic retainer (19).

7. The anti-deformation structure of a ball valve according to claim 2, characterized in that: Ball (3) and valve stem (8) connection part is equipped with electrostatic spring (20), electrostatic spring (20) side is equipped with steel ball (21).

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