Flange type soft sealing ball valve

Abstract

The flange type soft sealing ball valve comprises a valve body, a valve element is contained in the middle of the valve body and rotationally connected with the middle of the valve body, a valve handle is fixed to the top end of the valve element, the valve body extends towards the two sides, flanges are fixed to the extending ends of the two sides of the valve body, rubber inner cylinders are contained in the extending ends of the valve body respectively, and the two ends of each rubber inner cylinder abut against the two sides of the valve element respectively; the side, away from the ball valve, of the rubber inner cylinder is fixed to the valve body, the side, close to the ball valve, of the rubber inner cylinder is rotationally connected to the valve body, and a driving structure is arranged at the rotating end of the rubber inner cylinder. A pressure applying structure is arranged on the side, opposite to the valve element, of the rubber inner cylinder rotating end. The sealing ring has the effect of preventing untight sealing caused by eccentric wear of the sealing ring.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of ball valves, in particular to a flange type soft sealing ball valve. BACKGROUND

[0002] The ball valve is a valve in which the opening and closing member is rotated around the ball valve axis by the valve rod, and the ball valve is a soft sealing ball valve and a hard sealing ball valve.

[0003] The soft sealing ball valve has good sealing performance, but in use, the sealing surface is in the form of extrusion and forms a seal with the valve core, and in the process of sliding opening and closing, eccentric wear is prone to occur, and the application provides a soft sealing ball valve capable of preventing the sealing ring from being eccentrically worn. CONTENT OF THE UTILITY MODEL

[0004] In order to prevent the sealing ring from being eccentrically worn and causing a leak, the application provides a flange type soft sealing ball valve.

[0005] The flange type soft sealing ball valve provided by the application adopts the following technical scheme:

[0006] The flange type soft sealing ball valve comprises a valve body, a valve core accommodated and rotationally connected in the middle of the valve body, a valve handle fixed at the top end of the valve core, flanges fixed at the two extending ends of the valve body, rubber inner sleeves respectively accommodated in the extending ends of the valve body, and the two ends of the rubber inner sleeves abutting against the two sides of the valve core; the rubber inner sleeve away from the ball valve is fixed to the valve body, the rubber inner sleeve close to the ball valve is rotationally connected to the valve body, and a driving structure is arranged on the rotating end of the rubber inner sleeve; and a pressing structure is arranged on the side of the rotating end of the rubber inner sleeve relative to the valve core.

[0007] By adopting the above technical scheme, the friction between the valve core and the rubber inner sleeve is changed from the original simple rotating friction to rotating friction, the friction area is larger and more uniform, and the rubber inner sleeve can maintain a standard pressure when rubbing against the valve core, the pressure is increased after the valve core is closed, and the occurrence of a leak is prevented.

[0008] Preferably, the driving structure comprises a driving bevel gear and a driven bevel gear, the driving bevel gear is coaxially fixed to the valve core and accommodated in the gap between the valve body and the valve core, the driven bevel gears are respectively fixed to the rotating ends of the rubber inner sleeves and correspondingly arranged on the driving bevel gear, and the driving bevel gear is engaged with the two driven bevel gears.

[0009] By adopting the above technical scheme, the driving structure is small and simple, does not affect the sealing structure of the valve core, and is reliable and stable in operation.

[0010] Preferably, the pressure applying structure comprises a telescopic sleeve, a threaded ring and a pressure spring, the telescopic sleeve is fixed to the side opposite to the driven bevel gear of the rotating end of the rubber inner cylinder and is accommodated between the rubber inner cylinder and the valve body; the threaded ring is accommodated between the rubber inner cylinder and the valve body and is screwed to the inner side wall of the valve body, the telescopic sleeve is slidingly connected to the threaded ring along the extension direction of the valve body, and a gap is left between the telescopic sleeve and the threaded ring; one end of the pressure spring abuts against the telescopic sleeve and the other end drives the rubber inner cylinder to be close to the valve core.

[0011] By adopting the above technical scheme, the telescopic sleeve controls the position of the threaded ring by utilizing the rotating angle of the rubber inner cylinder, so that the rubber inner cylinder is kept at a standard abutting force when the valve is opened and the pressure is increased to keep sealing when the valve is closed.

[0012] Preferably, the driven bevel gear is fixed to the telescopic sleeve, and the telescopic sleeve is rotationally connected to the inner side wall of the valve body.

[0013] Preferably, an arc-shaped supporting cylinder is fixed in the valve body, the arc-shaped supporting cylinder is sleeved on the rubber inner cylinder, and the inner side wall of the arc-shaped supporting cylinder is outwardly arc-shaped expanded, and the rubber inner cylinder extends along the inner side wall of the arc-shaped supporting cylinder.

[0014] In summary, the present application has at least one of the following beneficial technical effects:

[0015] The friction between the valve core and the rubber inner cylinder is changed from simple rotating friction to rotating friction, so that the friction area is larger and more uniform, and at the same time, the rubber inner cylinder can maintain a standard pressure with the valve core during friction, and after the valve core is closed, the pressure is increased to prevent the sealing from being not tight;

[0016] The driving structure is small and simple and does not affect the sealing structure of the valve core, and is reliable and stable in operation;

[0017] The telescopic sleeve controls the position of the threaded ring by utilizing the rotating angle of the rubber inner cylinder, so that the rubber inner cylinder is kept at a standard abutting force when the valve is opened and the pressure is increased to keep sealing when the valve is closed. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic diagram of an embodiment of the present application;

[0019] Figure 2 is a partial sectional view of an embodiment of the present application showing the internal structure;

[0020] Figure 3 is a schematic diagram of an embodiment of the present application showing the internal structure with the valve body hidden.

[0021] Explanation of reference signs: 1, valve body; 2, valve core; 3, valve handle; 4, flange; 5, rubber inner cylinder; 6, driving structure; 61, driving bevel gear; 62, driven bevel gear; 7, pressure applying structure; 71, telescopic sleeve; 72, threaded ring; 73, pressure spring; 8, arc-shaped supporting cylinder. DETAILED DESCRIPTION

[0022] The application will be further described in detail below with reference to the accompanying drawings.

[0023] The application discloses a flange 4 type soft sealing ball valve, referring to Figure 1 , 2 , which comprises a valve body 1, a valve core 2 accommodated and rotationally connected in the middle of the valve body 1, and a valve handle 3 fixed at the top end of the valve core 2.

[0024] Referring to Figure 2 , 3 , the valve body 1 extends towards both sides, flanges 4 are fixed at the extending ends of the valve body 1, and rubber inner cylinders 5 are respectively accommodated in the extending ends of the valve body 1, with the two ends of each rubber inner cylinder 5 abutting against the two sides of the valve core 2; the rubber inner cylinder 5 away from the ball valve is fixed to the valve body 1, and the rubber inner cylinder 5 close to the ball valve is rotationally connected to the valve body 1 through a driving structure 6.

[0025] Referring to Figure 2 , 3 , the driving structure 6 comprises a driving bevel gear 61 and a driven bevel gear 62, the driving bevel gear 61 is coaxially fixed to the valve core 2 and accommodated in the gap between the valve body 1 and the valve core 2, and the driven bevel gears 62 are respectively fixed to the rotating ends of the rubber inner cylinders 5 and correspondingly arranged with the driving bevel gear 61, with the driving bevel gear 61 meshing with the two driven bevel gears 62.

[0026] Referring to Figure 2 , 3 , the driven bevel gears 62 are stably rotated through a pressure applying structure 7, the pressure applying structure 7 comprises a telescopic sleeve 71, a threaded ring 72 and a pressure spring 73, the telescopic sleeve 71 is fixed to the side of the rotating end of the rubber inner cylinder 5 opposite to the driven bevel gear 62, the driven bevel gear 62 is fixed to the telescopic sleeve 71, the telescopic sleeve 71 is rotationally connected to the inner side wall of the valve body 1, and the telescopic sleeve 71 is accommodated between the rubber inner cylinder 5 and the valve body 1.

[0027] Referring to Figure 2 , 3 , the threaded ring 72 is accommodated between the rubber inner cylinder 5 and the valve body 1, and is screwed to the inner side wall of the valve body 1, the telescopic sleeve 71 is slidingly connected to the threaded ring 72 along the extending direction of the valve body 1, and a gap is left between the telescopic sleeve 71 and the threaded ring 72; one end of the pressure spring 73 abuts against the telescopic sleeve 71, and the other end drives the rubber inner cylinder 5 to be close to the valve core 2.

[0028] Referring to Figure 2 ,3 The valve body 1 is fixed with an arc-shaped supporting cylinder 8, the arc-shaped supporting cylinder 8 is sleeved on the rubber inner cylinder 5, and the inner side wall of the arc-shaped supporting cylinder 8 is outwardly arc-shaped expanded. The rubber inner cylinder 5 extends along the inner side wall of the arc-shaped supporting cylinder 8, so that the length of the rubber inner cylinder 5 is greater than the corresponding length of the valve body 1, and the rubber inner cylinder 5 has a length for rotation, and the rubber inner cylinder 5 is supported.

[0029] The working process of the application is as follows: when the valve changes from the open state to the closed state, the valve handle 3 is rotated, the valve handle 3 drives the driving bevel gear 61 to rotate, the driven bevel gear 62 is rotated, the valve core 2 is closed, the driven bevel gear 62 drives the rubber inner cylinder 5 to rotate axially, so that the rubber inner cylinder 5 is rotated and rubbed with the surface of the valve core 2, so that the rubber inner cylinder 5 is uniformly worn, and the sealing is prevented from being not tight due to eccentric wear.

[0030] At the same time, the rubber inner cylinder 5 is arc-shaped extended with the arc-shaped supporting cylinder 8, and the length of the rubber inner cylinder 5 is greater than the corresponding length of the valve body 1, and the rubber inner cylinder 5 can be deformed and twisted with rotation, so that the contraction force is prevented from being generated, and the sealing effect is affected.

[0031] The driven bevel gear 62 drives the telescopic sleeve 71 to rotate at the same time, so as to drive the threaded ring 72 to rotate, the threaded ring 72 moves towards the side close to the valve core 2, the pressure of the pressing spring 73 against the rubber inner cylinder 5 abutting against the valve core 2 is boosted, so as to further improve the sealing effect.

[0032] The above are preferred embodiments of the application, and are not limited to the protection scope of the application, so that: any equivalent changes made according to the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. A flange (4) type soft-seal ball valve, comprising a valve body (1), a valve core (2) rotatably connected and housed in the middle of the valve body (1), and a valve handle (3) fixed to the top of the valve core (2), characterized in that: The valve body (1) extends towards two sides, and flanges (4) are fixed to the two extending ends of the valve body (1), rubber inner sleeves (5) are respectively arranged in the extending ends of the valve body (1), and the two ends of the rubber inner sleeves (5) abut against the two sides of the valve core (2); the rubber inner sleeve (5) fixed to the valve body (1) away from the ball valve, the rubber inner sleeve (5) is rotatably connected to the valve body (1) close to the ball valve, and the rotating end of the rubber inner sleeve (5) is provided with a driving structure (6); the rotating end of the rubber inner sleeve (5) is provided with a pressure applying structure (7) relative to one side of the valve core (2).

2. A soft-seal ball valve of the flanged (4) type according to claim 1, characterized in that: The driving structure (6) comprises a driving bevel gear (61) and a driven bevel gear (62), the driving bevel gear (61) is coaxially fixed to the valve core (2) and arranged in the gap between the valve body (1) and the valve core (2); the driven bevel gear (62) is fixed to the rotating end of the rubber inner sleeve (5) and arranged corresponding to the driving bevel gear (61), and the driving bevel gear (61) is engaged with the two driven bevel gears (62).

3. A soft-seal ball valve of the flanged (4) type according to claim 2, characterized in that: The pressure applying structure (7) comprises a telescopic sleeve (71), a threaded ring (72) and a pressure spring (73), the telescopic sleeve (71) is fixed to the rotating end of the rubber inner sleeve (5) relative to the driven bevel gear (62), and the telescopic sleeve (71) is arranged between the rubber inner sleeve (5) and the valve body (1); the threaded ring (72) is arranged between the rubber inner sleeve (5) and the valve body (1), and the threaded ring (72) is screwed to the inner side wall of the valve body (1), the telescopic sleeve (71) is slidingly connected to the threaded ring (72) along the extending direction of the valve body (1), and a gap is left between the telescopic sleeve (71) and the threaded ring (72); one end of the pressure spring (73) abuts against the telescopic sleeve (71), and the other end drives the rubber inner sleeve (5) to be close to the valve core (2).

4. A soft-seal ball valve of the flanged (4) type according to claim 3, characterized in that: The driven bevel gear (62) is fixed to the telescopic sleeve (71), and the telescopic sleeve (71) is rotatably connected to the inner side wall of the valve body (1).

5. A soft-seal ball valve of the flanged (4) type according to claim 1, characterized in that: The valve body (1) is fixed with an arc-shaped supporting cylinder (8), the arc-shaped supporting cylinder (8) is sleeved on the rubber inner sleeve (5), the inner side wall of the arc-shaped supporting cylinder (8) is outwardly arc-shaped expanded, and the rubber inner sleeve (5) extends along the inner side wall of the arc-shaped supporting cylinder (8).

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