Leakage-free ball valve

Abstract

The utility model provides a non-leakage ball valve which comprises a valve shell, a valve rod, a rotating handle, a pair of valve seats and a ball body, a rotating groove is formed in the ball body, the valve shell comprises a base shell and an installation shell, the base shell and the installation shell are matched and fixed through threads, and a rotating cavity used for installing the ball body is formed between the base shell and the installation shell. The base shell and the mounting shell are respectively provided with a first mounting groove, a rubber block is arranged on the tail portion of the valve seat, and when the base shell and the mounting shell are fixed in a threaded mode, the rubber block abuts against the valve seat and clamps the ball body, and the rubber block is arranged on the tail portion of the valve seat and enables the base shell and the mounting shell to be fixed in a matched mode through threads. Therefore, when the base shell and the mounting shell are rotationally matched and fixed, the valve seat is pressed on the ball body, the sealing performance between the ball body and the valve seat is improved, meanwhile, reverse pressure is provided through the elastic force of the rubber block, and the base shell and the mounting shell are not prone to loosening.

Description

Technical Field

[0001] This utility model relates to valve bodies, and more particularly to a leak-free ball valve. Background Technology

[0002] Currently, Chinese patent CN221121003U discloses a wear-resistant ball valve, including a valve body, a valve cover, a valve stem, and a ball. The valve cover is installed on the upper part of the valve body, and the valve stem passes through the valve cover. The inner end of the valve stem extends into the valve body and is linked to the ball. Valve seats are installed in the valve body at positions corresponding to both sides of the ball to form a sealing fit with the ball when the valve is closed. The inner wall of the valve body is provided with a mounting groove for embedding the valve seat. Multiple spring grooves are opened on the inner end face of the mounting groove. Compression springs and floating blocks are installed in the spring grooves. The springs abut against the floating blocks and press the valve seat against the ball.

[0003] The aforementioned patent still has shortcomings. The ball valve is sealed only by the valve seat, which is prone to wear after long-term use, resulting in leakage of liquid inside the valve. At the same time, the ball is held in place by a spring and a floating block, which makes it difficult to replace the valve seat later and cannot guarantee the sealing performance after replacement. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a leak-free ball valve with the advantage of high sealing performance.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a leak-free ball valve, comprising a valve body, a valve stem, a rotating handle, a pair of valve seats, and a ball. The ball has a rotating groove, and the bottom of the valve stem is provided with a square rotating rod inserted into the rotating groove. The valve body includes a base shell and a mounting shell, which are fixed by threaded engagement. A rotating cavity for mounting the ball is formed between the base shell and the mounting shell. The base shell and the mounting shell are each provided with a mounting groove. The two valve seats are respectively disposed in the two mounting grooves. A rubber block is provided at the tail of the valve seat. When the base shell and the mounting shell are threadedly fixed, the rubber block abuts against the valve seat and clamps the ball.

[0006] By using the above-mentioned technical means, a rubber block is set at the tail of the valve seat, and the base shell and the mounting shell are fixed by threaded engagement. When the base shell and the mounting shell are rotated and fixed, the valve seat is pressed onto the ball, thereby increasing the sealing between the ball and the valve seat. At the same time, the elasticity of the rubber block provides reverse pressure, so that the base shell and the mounting shell will not easily loosen.

[0007] Preferably, the valve stem has several annular grooves, and a sealing ring is provided in each annular groove.

[0008] The above-mentioned technical means are used to increase the sealing performance between the valve stem and the base shell.

[0009] Preferably, the bottom of the base shell has a through hole, a threaded rod is provided in the through hole, the bottom of the sphere has a positioning hole, the threaded rod is threadedly engaged with the through hole, the bottom of the threaded rod is inserted into the positioning hole, a second sealing ring is provided on the threaded rod, and a second sealing gasket is provided between the top of the threaded rod and the base shell.

[0010] By employing the aforementioned technical means, and by setting a threaded insert rod, the ball's installation position is ensured to remain fixed during installation, facilitating subsequent valve stem installation. Furthermore, by setting a second sealing ring and a second sealing gasket, the ball valve's sealing performance is guaranteed.

[0011] Preferably, a filter screen is provided at the bottom of the square rotating rod, and the filter screen is fixed to the square rotating rod by screws. A second mounting groove is also provided at the bottom of the rotating groove, and the filter screen is placed in the second mounting groove.

[0012] By employing the aforementioned technical means and installing a filter screen, the ball valve gains a filtering function. The filter screen is placed at the bottom of the square rotating rod and fixed with screws, allowing the valve stem to be removed when the filter screen needs cleaning or replacement.

[0013] Preferably, the valve stem is further provided with a flange ring, the rotating handle is provided with a sleeve hole, the rotating handle is sleeved on the valve stem through the sleeve hole and abuts against the flange ring, the upper end of the valve stem is also provided with a nut, the nut cooperates with the flange ring to clamp the rotating handle, the bottom of the flange ring is provided with a suction cup, the flange ring abuts against the suction cup to fix it on the base shell.

[0014] Using the aforementioned technical means, the handle is fixed to the valve stem by the cooperation of the flange ring and the nut. By setting a suction cup, the valve stem can be fixed when it is inserted into the base shell.

[0015] Preferably, a sealing gasket is provided between the valve stem and the base shell.

[0016] By using the above-mentioned technical means and by setting a sealing gasket, a certain buffer space is provided when the valve stem is pressed downwards, which facilitates the suction cup to grip the base shell tightly.

[0017] Preferably, the rotating handle includes a handle base and a handle rod, wherein the handle base and the handle rod are hinged together.

[0018] By employing the aforementioned technical means and through the hinged connection between the handle base and the handle lever, the handle lever can be lifted without rotating the valve body, thus reducing the chance of accidental activation.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. By setting a rubber block at the tail of the valve seat and fixing the base shell and the mounting shell with threads, the valve seat is pressed on the ball when the base shell and the mounting shell are rotated and fixed, thereby increasing the sealing between the ball and the valve seat. At the same time, the elasticity of the rubber block provides reverse pressure, making the base shell and the mounting shell easily loosen.

[0021] 2. By setting a threaded insert, the ball body is guaranteed not to shift during installation, which facilitates the subsequent installation of the valve stem. By setting a second sealing ring and a second sealing gasket, the sealing performance of the ball valve is guaranteed. When the filter screen needs to be replaced or cleaned, the ball body will not shift after the filter screen is pulled out. Attached Figure Description

[0022] Figure 1 This is a cross-sectional structural diagram of an embodiment;

[0023] Figure 2 for Figure 1 Schematic diagram of Part A;

[0024] Figure 3 for Figure 2 Schematic diagram of Part B;

[0025] Figure 4 This is a schematic diagram of the valve stem structure;

[0026] Figure 5 This is a schematic diagram of the filter screen structure;

[0027] Figure 6 This is a schematic diagram of the structure of a sphere.

[0028] Reference numerals: 1. Valve body; 2. Valve stem; 3. Rotary handle; 4. Valve seat; 5. Ball; 6. Rotary groove; 7. Square rotating rod; 8. Flow channel; 9. Base shell; 10. Mounting shell; 11. Mounting groove one; 12. Rubber block; 13. Insertion hole; 14. Ring groove; 15. Sealing ring one; 16. Through hole; 17. Threaded insert rod; 18. Sealing ring two; 19. Sealing gasket two; 20. Filter screen; 21. Mounting groove two; 22. Flange ring; 23. Sleeve hole; 24. Nut; 25. Suction cup; 26. Sealing gasket one; 27. Handle base; 28. Handle rod; 29. ​​Positioning hole. Detailed Implementation

[0029] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this utility model can be more easily understood and mastered.

[0030] A leak-free ball valve includes a valve body 1, a valve stem 2, a rotating handle 3, a pair of valve seats 4, and a ball 5. The ball 5 has a rotating groove 6. A square rotating rod 7 is provided at the bottom of the valve stem 2 and inserted into the rotating groove 6. A flow channel 8 is provided in the middle of the ball 5. When the flow channel 8 communicates with the flow channel 8 inside the valve body 1, the ball valve is open. The valve body 1 includes a base shell 9 and a mounting shell 10, which are fixed by a threaded connection. A rubber gasket is provided between the base shell 9 and the mounting shell 10 to ensure sealing. A rotating cavity for mounting the ball 5 is formed between the base shell 9 and the mounting shell 10. The base shell 9 and the mounting shell 10 are respectively provided with... There is an installation groove 11, and two valve seats 4 are respectively set in the two installation grooves 11. A rubber block 12 is set at the tail of the valve seat 4. When the base shell 9 and the mounting shell 10 are threadedly fixed, the rubber block 12 abuts against the valve seat 4 and clamps the ball 5. By setting the rubber block 12 at the tail of the valve seat 4 and fixing the base shell 9 and the mounting shell 10 through the threaded engagement, the valve seat 4 is pressed on the ball 5 when the base shell 9 and the mounting shell 10 are rotated and fixed, thereby increasing the sealing between the ball 5 and the valve seat 4. At the same time, the elasticity of the rubber block 12 provides reverse pressure, making the base shell 9 and the mounting shell 10 easily loosen.

[0031] The top of the base shell 9 has an insertion hole 13 for the valve stem 2 to pass through. The valve stem 2 has several annular grooves 14, and a sealing ring 15 is provided in the annular grooves 14. When the valve stem 2 is installed in the insertion hole 13, the sealing ring 15 undergoes elastic deformation, thereby increasing the sealing between the valve stem 2 and the base shell 9.

[0032] The bottom of the base shell 9 has a perforation 16, and a threaded rod 17 is installed in the perforation 16. The threaded rod 17 is similar to a bolt. The bottom of the sphere 5 has a positioning hole 29. The threaded rod 17 is threadedly engaged with the perforation 16. The bottom of the threaded rod 17 is a smooth rod that is inserted into the positioning hole 29. A second sealing ring 18 is installed on the threaded rod 17. A second sealing gasket 19 is installed between the top of the threaded rod 17 and the base shell 9. When the threaded rod 17 is threadedly engaged with the perforation 16, both the second sealing ring 18 and the second sealing gasket 19 are in a compressed state, ensuring that water will not flow out from the perforation 16.

[0033] A filter screen 20 is provided at the bottom of the square rotating rod 7. The filter screen 20 is fixed to the square rotating rod 7 with screws. The bottom of the rotating groove 6 is also provided with a second mounting groove 21. The filter screen 20 is placed in the second mounting groove 21. By setting the filter screen 20, the ball valve has a filtering function. By setting the filter screen 20 at the bottom of the square rotating rod 7 and fixing it with screws, the valve stem 2 can be removed when the filter screen 20 needs to be cleaned or replaced. By setting the threaded insertion rod 17, the position of the ball 5 will not be shifted after the filter screen 20 is pulled out.

[0034] A flange ring 22 is also provided on the valve stem 2. A sleeve hole 23 is provided on the rotating handle 3. The rotating handle 3 is sleeved on the valve stem 2 through the sleeve hole 23 and abuts against the flange ring 22. A nut 24 is also provided at the upper end of the valve stem 2. The nut 24 cooperates with the flange ring 22 to clamp the rotating handle 3. A suction cup 25 is sleeved at the bottom of the flange ring 22. The flange ring 22 abuts against the suction cup 25 to fix it on the base shell 9. When installing the valve stem 2, the square rotating rod 7 is aligned with the rotating groove 6 and inserted to the bottom. At this time, the suction cup 25 expels air and is sucked tightly on the base shell 9. While fixing the valve stem 2, it also plays a certain sealing role. A sealing gasket 26 is provided between the valve stem 2 and the base shell 9. So when the valve stem 2 is pressed down, the deformation of the sealing gasket gives the suction cup 25 a certain buffer space, which makes it easy for the suction cup 25 to suck the base shell 9 tightly.

[0035] The rotating handle 3 includes a handle base 27 and a handle rod 28. The handle base 27 and the handle rod 28 are hinged together, so that the handle rod 28 can be lifted when the valve body does not need to be rotated, reducing the chance of accidental operation.

[0036] The following is the installation process: First, install the valve seat 4 into the base shell 9 and the mounting shell 10 respectively. Then, place the ball 5 into the base shell 9. Next, tighten the ball 5 by screwing it into the mounting shell 10. At this time, insert the threaded rod 17 into the ball 5 to ensure that the installation position of the ball 5 is error-free. Then, install the filter screen 20 at the bottom of the valve stem 2 and put the sealing ring 15 on the valve stem 2. At the same time, put the sealing gasket 26 into the insertion hole 13. Then, insert the valve stem 2 into the insertion hole 13 and make the suction cup 25 stick to the base shell 9. Finally, install the rotating handle 3 on the top of the valve stem 2.

[0037] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A leak-free ball valve, comprising a valve body (1), a valve stem (2), a rotating handle (3), a pair of valve seats (4), and a ball (5), wherein the ball (5) has a rotating groove (6), and the bottom of the valve stem (2) is provided with a square rotating rod (7) inserted into the rotating groove (6), characterized in that: The valve housing (1) includes a base housing (9) and a mounting housing (10). The base housing (9) and the mounting housing (10) are fixed by a threaded connection. A rotating cavity for mounting a ball (5) is formed between the base housing (9) and the mounting housing (10). Mounting grooves (11) are respectively provided on the base housing (9) and the mounting housing (10). The two valve seats (4) are respectively set in the two mounting grooves (11). A rubber block (12) is provided at the tail of the valve seat (4). When the base housing (9) and the mounting housing (10) are fixed by threads, the rubber block (12) abuts against the valve seat (4) and clamps the ball (5).

2. The leak-free ball valve according to claim 1, characterized in that: The valve stem (2) has several annular grooves (14), and a sealing ring (15) is provided in the annular grooves (14).

3. The leak-free ball valve according to claim 1, characterized in that: The base shell (9) has a through hole (16) at the bottom, and a threaded rod (17) is provided in the through hole (16). The sphere (5) has a positioning hole (29) at the bottom. The threaded rod (17) is threadedly engaged with the through hole (16). The bottom of the threaded rod (17) is inserted into the positioning hole (29). A sealing ring (18) is provided on the threaded rod (17). A sealing gasket (19) is provided between the top of the threaded rod (17) and the base shell (9).

4. A leak-free ball valve according to claim 1, characterized in that: The square rotating rod (7) is provided with a filter screen (20) at the bottom. The filter screen (20) is fixed to the square rotating rod (7) by screws. The rotating groove (6) is also provided with a second mounting groove (21) at the bottom. The filter screen (20) is placed in the second mounting groove (21).

5. A leak-free ball valve according to claim 4, characterized in that: A flange ring (22) is also provided on the valve stem (2), and a sleeve hole (23) is provided on the rotating handle (3). The rotating handle (3) is sleeved on the valve stem (2) through the sleeve hole (23) and abuts against the flange ring (22). A nut (24) is also provided at the upper end of the valve stem (2). The nut (24) cooperates with the flange ring (22) to clamp the rotating handle (3). A suction cup (25) is sleeved at the bottom of the flange ring (22). The flange ring (22) abuts against the suction cup (25) to fix it on the base shell (9).

6. A leak-free ball valve according to claim 5, characterized in that: A sealing gasket (26) is provided between the valve stem (2) and the base shell (9).

7. A leak-free ball valve according to claim 1, characterized in that: The rotating handle (3) includes a handle base (27) and a handle rod (28), and the handle base (27) and the handle rod (28) are hinged together.

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