High-frequency switch wear-resistant ball valve

Abstract

The utility model relates to the technical field of valves, and discloses a high-frequency switch wear-resistant ball valve. The check valve comprises a valve body internally provided with padding, a gland and an opening and closing ball, a valve rod and a fixing shaft are arranged at the top and the bottom of the opening and closing ball respectively, movable valve seat sealing rings capable of rebounding are attached to the two sides of the opening and closing ball respectively, the valve rod and the fixing shaft are each provided with two protruding blocks, and the protruding blocks are arranged on the valve rod and the fixing shaft respectively. Four shifting rods used for shifting the valve seat sealing ring are movably installed in the valve body, and one ends of the four shifting rods make contact with the valve rod and the fixing shaft respectively. When the opening and closing ball rotates, the valve seat sealing ring can be temporarily separated from the opening and closing ball, so that abrasion between the valve seat sealing ring and the opening and closing ball is reduced, and the service life of the ball valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a high-frequency switching wear-resistant ball valve. Background Art

[0002] A ball valve is a type of valve, which is mainly composed of a valve body, a valve stem, an opening and closing ball with a through hole, and a valve seat sealing ring. Its opening and closing is mainly achieved by the valve stem driving the opening and closing ball to rotate. The valve seat sealing ring is generally located on both sides of the opening and closing ball and fits with the opening and closing ball to ensure the sealing of the opening and closing ball when it is closed. However, when the opening and closing ball rotates, it will produce friction with the valve seat sealing ring. When the switching frequency of the ball valve is high, the opening and closing ball will accelerate the wear of the valve seat sealing ring, resulting in a reduction in the service life of the ball valve. Therefore, it is necessary to propose a high-frequency switching wear-resistant ball valve. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a high-frequency switching wear-resistant ball valve.

[0004] The utility model is implemented by the following technical scheme: a valve body is provided with packing, a pressure cover and an opening and closing ball inside, a valve stem and a fixed shaft are provided at the top and the bottom of the opening and closing ball respectively, movable and reboundable valve seat sealing rings are fitted on both sides of the opening and closing ball, two protrusions are provided on the valve stem and the fixed shaft, four levers for moving the valve seat sealing rings are movably installed in the valve body, and one end of the four levers is in contact with the valve stem and the fixed shaft respectively.

[0005] As a further improvement of the above scheme, annular grooves are provided on the inner walls of both sides of the valve body, four first sliding grooves distributed in an annular shape are provided on the inner walls of the two annular grooves, positioning rods are slidably installed in the eight first sliding grooves, a detachable fixing ring is installed on one side of the two valve seat sealing rings, one side of the two fixing rings is respectively fixedly connected to the corresponding four positioning rods, and springs are slidably sleeved on the eight positioning rods, and both ends of the springs are respectively against the inner wall of the annular groove and the fixing ring.

[0006] As a further improvement of the above solution, an isolating ring is fixedly installed inside the fixing ring, and the position of the isolating ring coincides with that of the annular groove.

[0007] As a further improvement of the above scheme, two second slide grooves are provided on both sides of the valve body, one end of the four shift rods respectively extend into the corresponding second slide grooves and are slidably connected with the corresponding second slide grooves, the shift rods are composed of two parts, the rod body and the shift block, and the shift block is in contact with the valve seat sealing ring.

[0008] As a further improvement of the above solution, a pulley is rotatably mounted on one end of the lever, and the valve stem and the fixed shaft are in contact with the corresponding pulleys respectively.

[0009] As a further improvement of the above solution, the second sliding groove is a rectangular groove, and the cross section of the shifting rod is a rectangle.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] The utility model can simultaneously push away the two valve seat sealing rings attached to the opening and closing ball when the opening and closing ball is rotated, so as to avoid the opening and closing ball from continuously rubbing against the valve seat sealing ring when rotating, thereby reducing the wear of the valve seat sealing ring by the opening and closing ball when rotating, thereby improving the wear resistance of the ball valve, so that the service life of the ball valve can still be guaranteed under the condition of high frequency use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a first cross-sectional structural diagram of the high-frequency switch wear-resistant ball valve of the utility model;

[0013] Figure 2 This is a second cross-sectional structural diagram of the high-frequency switch wear-resistant ball valve of the utility model;

[0014] Figure 3 This is a planar cross-sectional view of the high-frequency switch wear-resistant ball valve of the utility model;

[0015] Figure 4 This is a planar cross-sectional view showing the internal structure of the high-frequency switch wear-resistant ball valve of the utility model;

[0016] Figure 5 This is a top view of the internal structure of the high-frequency switching wear-resistant ball valve of the utility model.

[0017] Description of main symbols:

[0018] 1. Valve body; 2. Packing; 3. Gland; 4. Opening and closing ball; 5. Valve stem; 6. Fixed shaft; 7. Annular groove; 8. First slide groove; 9. Positioning rod; 10. Fixed ring; 11. Valve seat sealing ring; 12. Spring; 13. Second slide groove; 14. Push rod; 15. Push block; 16. Pulley; 17. Bump; 18. Isolation ring. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0020] Please combine Figures 1 to 5The high-frequency switch wear-resistant ball valve of this embodiment includes: a valve body 1 with a packing 2, a pressure cover 3 and an opening and closing ball 4 arranged inside, a valve stem 5 and a fixed shaft 6 are respectively arranged on the top and bottom of the opening and closing ball 4, and a movable and reboundable valve seat sealing ring 11 is attached to both sides of the opening and closing ball 4. Two protrusions 17 are arranged on the valve stem 5 and the fixed shaft 6. The protrusion 17 can drive the lever 14 to move by extrusion as the fixed shaft 6 and the valve stem 5 rotate. Four levers 14 for moving the valve seat sealing ring 11 are movably installed in the valve body 1, and one end of the four levers 14 is respectively in contact with the valve stem 5 and the fixed shaft 6.

[0021] Annular grooves 7 are provided on the inner walls of both sides of the valve body 1, and four first slide grooves 8 distributed in an annular shape are provided on the inner walls of the two annular grooves 7. Positioning rods 9 are slidably installed in the eight first slide grooves 8. A detachable fixing ring 10 is installed on one side of the two valve seat sealing rings 11. One side of the two fixing rings 10 is fixedly connected to the corresponding four positioning rods 9 respectively. Springs 12 are slidably sleeved on the eight positioning rods 9, and both ends of the spring 12 are respectively against the inner wall of the annular groove 7 and the fixing ring 10.

[0022] Through the above technical scheme, the annular groove 7 allows the valve seat sealing ring 11 to have space to retreat in the valve body 1 after being squeezed, and the first slide groove 8 can limit the positioning rod 9 without affecting the extension and retraction of the positioning rod 9, thereby ensuring the stability of the positioning rod 9, and the fixing ring 10 cooperates with the four positioning rods 9 and the spring 12 to form a rebound mechanism of the valve seat sealing ring 11, ensuring that the valve seat sealing ring 11 can always be tightly attached to the opening and closing ball 4 in the closed state, thereby ensuring the sealing between the two, and when the valve seat sealing ring 11 is excessively worn, the valve seat sealing ring 11 can also be removed and replaced.

[0023] An isolating ring 18 is fixedly installed in the fixing ring 10 , and the position of the isolating ring 18 coincides with the position of the annular groove 7 .

[0024] Through the above technical solution, the isolation ring 18 can shield the spring 12 to prevent excessive impurities from assisting the spring 12 and affecting the normal movement and rebound of the valve seat sealing ring 11 .

[0025] Two second slide grooves 13 are provided on both sides of the valve body 1. One end of four levers 14 extends into the corresponding second slide grooves 13 respectively and is slidably connected with the corresponding second slide grooves 13. The lever 14 consists of two parts: a rod body and a lever block 15. The lever block 15 is in contact with the valve seat sealing ring 11.

[0026] Through the above technical solution, the second slide groove 13 can ensure the stability of the lever 14 without affecting its normal telescopic movement. The lever block 15 is the main component for the lever 14 to drive the valve seat sealing ring 11 to move.

[0027] A pulley 16 is rotatably mounted on one end of the lever 14 , and the valve stem 5 and the fixed shaft 6 are in contact with the corresponding pulley 16 , respectively.

[0028] Through the above technical solution, the pulley 16 can prevent wear between the protrusion 17 and the lever 14 when the protrusion 17 presses the lever 14.

[0029] The second sliding groove 13 is a rectangular groove, and the cross section of the lever 14 is a rectangle.

[0030] Through the above technical solution, the lever 14 will not be affected by external force and will not rotate upside down, thus avoiding structural dislocation that causes the valve seat sealing ring 11 to be unable to move.

[0031] The implementation principle of a high-frequency switch wear-resistant ball valve in the embodiment of the present application is:

[0032] When the opening and closing ball 4 is rotated by the valve stem 5, the valve stem 5, the opening and closing ball 4 and the fixed shaft 6 rotate synchronously. At this time, as the valve stem 5 and the fixed shaft 6 rotate, the two protrusions 17 on the two will push the four levers 14 open. During the movement, the lever 14 will push the valve seat sealing ring 11 through the lever block 15, so that the valve seat sealing ring 11 is separated from the opening and closing ball 4, so as to avoid the friction between the opening and closing ball 4 and the valve seat sealing ring 11 during rotation, causing wear to the valve seat sealing ring. When the valve stem 5, the opening and closing ball 4 and the fixed shaft 6 rotate ninety degrees to complete the opening or closing of the ball valve, the pulley 16 on the lever 14 contacts the valve stem 5 and the fixed shaft 6 again. At this time, under the push of the spring 12, the valve seat sealing ring 11 is again attached to the opening and closing ball 4 to complete the closing work.

[0033] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A high-frequency switch wear-resistant ball valve, characterized in that: include: A valve body is provided with packing, a pressure cover and an opening and closing ball inside, a valve stem and a fixed shaft are respectively provided on the top and bottom of the opening and closing ball, movable and reboundable valve seat sealing rings are fitted on both sides of the opening and closing ball, two protrusions are provided on the valve stem and the fixed shaft, four levers for moving the valve seat sealing rings are movably installed in the valve body, and one end of the four levers is respectively in contact with the valve stem and the fixed shaft.

2. The high-frequency switch wear-resistant ball valve according to claim 1, characterized in that: The inner walls on both sides of the valve body are provided with annular grooves, and four first sliding grooves distributed in an annular shape are provided on the inner walls of the two annular grooves. Positioning rods are slidably installed in the eight first sliding grooves, and a detachable fixing ring is installed on one side of the two valve seat sealing rings. One side of the two fixing rings is respectively fixedly connected to the corresponding four positioning rods, and springs are slidably sleeved on the eight positioning rods, and two ends of the springs are respectively against the inner wall of the annular groove and the fixing ring.

3. The high-frequency switching wear-resistant ball valve according to claim 2, characterized in that: An isolating ring is fixedly installed in the fixing ring, and the position of the isolating ring coincides with the annular groove.

4. The high-frequency switch wear-resistant ball valve according to claim 1, characterized in that: Two second slide grooves are arranged on both sides of the valve body, one end of four shifting rods respectively extends into the corresponding second slide grooves and is slidably connected with the corresponding second slide grooves, the shifting rod is composed of two parts, a rod body and a shifting block, and the shifting block is in contact with the valve seat sealing ring.

5. The high-frequency switching wear-resistant ball valve according to claim 1, characterized in that: A pulley is rotatably mounted on one end of the shifting rod, and the valve stem and the fixed shaft are in contact with the corresponding pulleys respectively.

6. The high-frequency switching wear-resistant ball valve according to claim 4, characterized in that: The second sliding groove is a rectangular groove, and the cross section of the shifting rod is a rectangle.

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