Novel liquid leakage prevention ball valve structure

Abstract

The utility model relates to the technical field of ball valve equipment, in particular to a novel liquid leakage prevention ball valve structure. Comprising a ball valve body, a butterfly-shaped handle is rotationally connected to the upper portion of the ball valve body, a valve rod is further arranged between the ball valve body and the butterfly-shaped handle, one side of the valve rod is fixedly connected with the butterfly-shaped handle, and the other side of the valve rod is inserted into a through hole in the upper portion of the ball valve body. The valve rod is sleeved with a compression nut, a first valve rod gasket, padding, a first O-shaped ring and a second valve rod gasket from the upper side to the lower side. The device can ensure the sealing reliability of the ball valve.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valve equipment, in particular to a novel anti-liquid leakage ball valve structure. Background Art

[0002] With the continuous development of energy storage technology, the size of equipment is shrinking and the power of equipment is increasing. Traditional air cooling can no longer meet the cooling needs of energy storage batteries. In order to ensure the continuous, reliable and stable operation of the equipment, the thermal management of core components is extremely important. Under such high power density conditions, liquid cooling technology must be used to ensure that the operating temperature of the core component battery is within the appropriate range. In order to extend the service life of the battery, many valves are required in the liquid cooling system to open and close the fluid to ensure the stable operation of the energy storage battery components.

[0003] At present, the ball valves on the market use polytetrafluoroethylene (PTFE) seals at the end covers and valve stems. As the ball valve is used for a long time, the PTFE material itself is prone to cold flow collapse, resulting in insufficient compression of the seal, gradually losing its sealing function and causing leakage in the liquid cooling system, affecting the normal use of the equipment, and even causing lithium batteries to burn and explode, causing property loss or personal injury.

[0004] Based on the above problems, there is an urgent need for a ball valve sealing structure that can ensure that the ball valve will not lose its sealing function after long-term use, resulting in leakage in the liquid cooling system. Utility Model Content

[0005] The polytetrafluoroethylene sealing material of the current ball valve structure is prone to lose its sealing effect after long-term use. The present application provides a new type of leak-proof ball valve structure to solve the above problem.

[0006] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0007] An embodiment of the present application discloses a novel anti-leakage ball valve structure, including a ball valve body, a butterfly handle rotatably connected to the top of the ball valve body, a valve stem is also arranged between the ball valve body and the butterfly handle, one side of the valve stem is fixedly connected to the butterfly handle, and the other side is inserted into a through hole above the ball valve body, and the valve stem is sleeved with a clamping nut, a first valve stem gasket, a packing, a first O-ring and a second valve stem gasket from the upper side to the lower side.

[0008] Optionally, a welded three-piece valve cover is provided below the ball valve body, and a guide groove is provided above the welded three-piece valve cover.

[0009] Optionally, a welded three-piece valve body is provided at the bottom of the welded three-piece valve cover.

[0010] Optionally, a straight-through ball core is provided on the top surface of the welded three-piece valve body, and a straight-through valve seat is provided on one side of the straight-through ball core.

[0011] Optionally, a second O-ring is provided between the welded three-piece valve body and the welded three-piece valve cover.

[0012] Optionally, a hexagonal head bolt is passed through one side of the welded three-piece valve cover, and a hexagonal nut, a flat washer and an elastic washer are arranged above the hexagonal head bolt.

[0013] The beneficial effects of the utility model are:

[0014] The traditional ball valve uses a complete PTFE seal on the valve stem, while the present application uses an O-ring + PTFE double seal. The traditional PTFE seal uses a nut to compress the PTFE packing 11. With repeated opening and closing, the PTFE wears and causes the gap between the valve stem and the PTFE to increase, thereby causing leakage. The structure of the present application adds an O-ring seal. Although the ball valve is repeatedly opened and closed, the O-ring itself is elastic and has a 3% elongation rate. It tightly hugs the valve stem and has a 25% compression rate with the inner wall of the shell, ensuring the reliability of the seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a schematic diagram of the structure of the anti-leakage ball valve for this application;

[0017] In the figure:

[0018] 1. Ball valve body; 2. Butterfly handle; 3. Valve stem; 4. Compression nut; 5. First valve stem gasket; 6. Packing; 7. First O-ring; 8. Second valve stem gasket; 9. Welded three-piece valve cover; 10. Guide groove; 11. Welded three-piece valve body; 12. Straight-through ball core; 13. Straight-through valve seat; 14. Second O-ring; 15. Hexagon bolt; 16. Hexagon head nut; 17. Elastic gasket. DETAILED DESCRIPTION

[0019] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0020] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0021] See also Figure 1 , like the original ball valve structure, the ball valve uses polytetrafluoroethylene (PTFE) seals at the end cover and valve stem 3. As the ball valve is used for a long time, the PTFE material itself is prone to cold flow collapse, resulting in insufficient compression of the seal, gradually losing the sealing function, resulting in leakage of the liquid cooling system, affecting the normal use of the equipment, and even causing lithium batteries to burn and explode, causing property loss or personal injury. Based on the above problems, the embodiment of the present application discloses a new type of leak-proof ball valve structure, including a ball valve body 1, a butterfly handle 2 is rotatably connected to the top of the ball valve body 1, and a valve stem 3 is also arranged between the ball valve body 1 and the butterfly handle 2. One side of the valve stem 3 is fixedly connected to the butterfly handle 2, and the other side is inserted into the through hole above the ball valve body 1. The valve stem 3 is sleeved with a clamping nut 4, a first valve stem gasket 5, a packing 6, a first O-ring 7 and a second valve stem gasket 8 from the upper side to the lower side. The present application uses a double sealing structure sealed by the first valve stem gasket 5 and the packing 6 made of PTFE material, and the performance is more reliable. The compression rate of traditional PTFE in sealing is only 5%-7%, which is low, and PTFE is prone to cold flow. With the passage of time and changes in temperature, its compression rate will decrease, resulting in the attenuation of the sealing effect of the end face seal, thereby causing leakage. The present application adopts a double seal of the first O-ring 7 made of PTFE+EPDM material. The compression rate of the first O-ring 7 is between 20%-35%, and the first O-ring 7 does not have the cold flow phenomenon similar to PTFE, and the sealing is more reliable.

[0022] A welded three-piece valve cover 9 is provided below the ball valve body 1, and a guide groove 10 is provided above the welded three-piece valve cover 9. The present application provides a guide groove 10 above the three-piece valve cover. The design of the guide groove 10 is more conducive to the assembly of the ball valve. The suspended PTFE structure used in the traditional ball valve not only has a poor sealing effect, but also is easy to be side-loaded during assembly. The new structure is an inserted guide structure, which is easier to install and will not have a side-load situation. The reliability of the ball valve is ensured.

[0023] The bottom of the welded three-piece valve cover 9 is provided with a welded three-piece valve body 11. The traditional welded ball valve is prone to heat accumulation at the welding point, resulting in cracking. The traditional structural connection is a vertical platform structure, and the present application is a 5-degree groove structure. It is not easy to cause heat accumulation at the step during welding, which leads to cracking of the interface. The 5-degree groove design can better release the stress of welding.

[0024] A through ball core 12 is disposed on the top surface of the welded three-piece valve body 11 , and a through valve seat 13 is disposed on one side of the through ball core 12 .

[0025] A second O-ring 14 is arranged between the welded three-piece valve body 11 and the welded three-piece valve cover 9 .

[0026] A hexagonal bolt 15 is passed through one side of the welded three-piece valve cover 9 , and a hexagonal nut 16 , a flat washer and an elastic washer 17 are arranged above the hexagonal bolt 15 .

[0027] Unless otherwise specified, the device components involved in the above embodiments are all conventional device components, and the connection methods and control methods involved are all conventional connection methods and control methods unless otherwise specified.

[0028] The present invention has been described in detail above in conjunction with the embodiments. However, those skilled in the art will appreciate that, without departing from the spirit of the present invention, the specific parameters in the embodiments described above may be changed to form a plurality of specific embodiments, which are all within the common variation range of the present invention and will not be described in detail herein.

Claims

1. A new type of anti-leakage ball valve structure, characterized in that: The invention comprises a ball valve body (1), a butterfly handle (2) being rotatably connected to the top of the ball valve body (1), a valve stem (3) being arranged between the ball valve body (1) and the butterfly handle (2), one side of the valve stem (3) being fixedly connected to the butterfly handle (2), and the other side of the valve stem (3) being inserted into a through hole above the ball valve body (1), and the valve stem (3) being sleeved with a clamping nut (4), a first valve stem gasket (5), a packing (6), a first O-ring (7) and a second valve stem gasket (8) from the upper side to the lower side.

2. A novel anti-leakage ball valve structure according to claim 1, characterized in that: A welded three-piece valve cover (9) is provided below the ball valve body (1), and a guide groove (10) is provided above the welded three-piece valve cover (9).

3. A novel anti-leakage ball valve structure according to claim 2, characterized in that: A welded three-piece valve body (11) is provided at the bottom of the welded three-piece valve cover (9).

4. A novel anti-leakage ball valve structure according to claim 3, characterized in that: A straight-through ball core (12) is provided on the top surface of the welded three-piece valve body (11), and a straight-through valve seat (13) is provided on one side of the straight-through ball core (12).

5. The novel anti-leakage ball valve structure according to claim 3 is characterized in that: A second O-ring (14) is provided between the welded three-piece valve body (11) and the welded three-piece valve cover (9).

6. A novel anti-leakage ball valve structure according to claim 2, characterized in that: A hexagonal bolt (15) passes through one side of the welded three-piece valve cover (9), and a hexagonal nut (16), a flat washer and an elastic washer (17) are arranged above the hexagonal bolt (15).

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