A self-locking ball stop valve

Abstract

This application relates to a self-locking ball stop valve, comprising a valve body, an inlet connector disposed on the valve body, a rotating shaft cavity formed within the valve body, and a valve core disposed within the rotating shaft cavity for controlling the opening and closing of the inlet connector; a valve seat disposed within the rotating shaft cavity, the valve core rotating and being limited on the valve seat; a pressure relief groove disposed on the outer circumferential surface of the valve seat, and a pressure relief hole disposed on the inlet connector, one end of the pressure relief hole communicating with the interior of the inlet connector, and the other end of the pressure relief hole communicating with the pressure relief groove. This application has the effect of reducing the aging and fatigue rate of sealing components, effectively mitigating the adverse effects of pressure buildup on sealing components, extending service life, and improving safety.

Description

Technical Field

[0001] This application relates to the field of gate valve technology, and in particular to a self-locking ball gate valve. Background Technology

[0002] Currently, the self-locking ball valve is a type of valve that combines the features of a ball valve and a gate valve, with a self-locking function. It is mainly used in pipeline systems that require precise flow control, frequent opening and closing, and reliable locking in a specific position.

[0003] Its core component is a perforated sphere that rotates 90 degrees to open and close the valve. When the orifice of the sphere is aligned with the pipe, fluid flows through; when the sphere rotates until the orifice is perpendicular to the pipe, the fluid is cut off. Equipped with mechanical locking devices (such as lock nuts, locating pins, or handle locks), the valve can be locked in the open, closed, or intermediate positions to prevent changes in valve position due to vibration, misoperation, or external impact.

[0004] The self-locking ball valve in the related technology includes a valve seat with an inlet connector at one end. A rotating cavity is formed within the valve seat, and a valve core is rotatably positioned within the rotating cavity. A valve stem is located outside the valve core. When the valve core closes the inlet connector under the drive of the valve stem, some fluid is trapped in the narrow gap formed between the rotating cavity and the outside of the valve core. When the fluid temperature is high, the fluid accumulated in this narrow gap will generate significant pressure. Prolonged pressure buildup will accelerate the aging and fatigue of the sealing components, ultimately affecting its service life. Utility Model Content

[0005] This application provides a self-locking ball gate valve, which can reduce the aging and fatigue rate of sealing components, effectively alleviate the adverse effects of pressure buildup on sealing components, extend service life, and improve safety.

[0006] The self-locking spherical gate valve provided in this application adopts the following technical solution:

[0007] A self-locking ball stop valve includes a valve body, an inlet connector disposed on the valve body, a rotating shaft cavity formed within the valve body, a valve core disposed within the rotating shaft cavity for controlling the opening and closing of the inlet connector, a valve seat disposed within the rotating shaft cavity, the valve core rotating and being limited on the valve seat, a pressure relief groove disposed on the outer circumferential surface of the valve seat, a pressure relief hole disposed on the inlet connector, one end of the pressure relief hole communicating with the interior of the inlet connector, and the other end of the pressure relief hole communicating with the pressure relief groove.

[0008] Preferably, a sealing platform is provided on the outer wall of the valve seat facing the liquid inlet connector, and the sealing platform is in close contact with the outer wall of the liquid inlet connector for sealing; a drain ring groove is formed between the valve seat and the liquid inlet connector, located outside the sealing platform, one side of the drain ring groove is connected to the pressure relief hole, and the other side of the drain ring groove is connected to the pressure relief groove.

[0009] Preferably, a first sealing groove is provided on the inner sidewall of the valve body, and a first sealing ring is fitted on the outer sidewall of the liquid inlet connector and limited to the first sealing groove. The first sealing ring and the inner sidewall of the first sealing groove are fitted together and sealed.

[0010] Preferably, a second sealing groove is provided on the outer wall of the liquid inlet connector, and a second sealing ring is provided in the second sealing groove. The second sealing ring is in contact with and seals the inner wall of the valve body.

[0011] Preferably, a filter element is provided in the outlet of the valve body, and the filter element and the inlet connector are located on opposite sides of the valve core; the filter element has through-holes.

[0012] Preferably, a valve stem is rotatably mounted on the valve body, the valve stem is inserted into the valve core, and a handle is movably mounted on the outside of the valve stem; the handle is provided with a locking hole, the valve body is provided with a positioning pin for insertion into the locking hole, and the valve stem is also provided with a spring located inside the handle, the spring extends and retracts along the sliding direction of the handle, and the spring is used to press the handle tightly against the outer wall of the valve body.

[0013] Preferably, the valve stem end is provided with a pressing seat extending to the outside of the handle, and the pressing seat is provided with a third sealing ring located inside the handle, the third sealing ring being in contact with and sealing the inner sidewall of the handle.

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

[0015] After the valve core adjustment is completed, simply remove the external force applied to the handle. At this time, the handle will automatically press down and reset under the action of the spring force. The self-locking process is quick and easy to operate.

[0016] The medium in the drain ring groove can flow back to the flow channel of the inlet connector through the pressure relief hole, thereby achieving air pressure balance between the flow channel of the inlet connector and the internal gap of the rotating shaft cavity, reducing the aging and fatigue rate of the sealing components, effectively mitigating the adverse effects of pressure buildup on the sealing components, extending service life, and improving safety. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0018] Figure 2This is a schematic diagram highlighting a portion of the valve stem and valve core.

[0019] Figure 3 yes Figure 2 A schematic diagram of a partial structural explosion;

[0020] Figure 4 yes Figure 1 A schematic diagram of a partial structural cross-section;

[0021] Figure 5 yes Figure 4 A magnified structural diagram of point A in the middle.

[0022] Explanation of reference numerals in the attached drawings: 1. Valve body; 10. Rotary shaft cavity; 11. First sealing groove; 2. Liquid inlet connector; 20. Pressure relief hole; 21. Second sealing groove; 3. Valve core; 4. Valve seat; 40. Pressure relief groove; 400. Sealing platform; 41. Drainage ring groove; 5. First sealing ring; 6. Second sealing ring; 7. Filter element; 70. Filter hole; 8. Valve stem; 80. First limiting plane; 81. Press seat; 82. Third sealing ring; 9. Handle; 90. Locking hole; 91. Positioning pin; 92. Second limiting plane; 93. Spring. Detailed Implementation

[0023] The present application will be further described in detail below with reference to the accompanying drawings.

[0024] This application discloses a self-locking spherical shut-off valve.

[0025] Reference Figure 1 , Figure 2 The self-locking ball stop valve includes a valve body 1, one end of which is connected to an inlet connector 2. A rotating shaft cavity 10 is formed inside the valve body 1. Two valve seats 4 are arranged opposite each other inside the rotating shaft cavity 10. A valve core 3 for controlling the opening and closing of the inlet connector 2 is rotatably arranged between the two valve seats 4. The valve core 3 is limited on the valve seats 4.

[0026] like Figure 3 , Figure 4 As shown, a valve stem 8 is rotatably mounted on the valve body 1 to control the rotation of the valve core 3 within the rotating shaft cavity 10. The end of the valve stem 8 is inserted into and limited on the valve core 3, and the valve stem 8 and the rotation axis of the valve core 3 are coaxial. A handle 9 is mounted on the valve stem 8, located outside the valve body 1, and the handle 9 is slidably mounted on the valve stem 8 along its length. A first limiting plane 80 is provided on the outer side wall of the valve stem 8, and a second limiting plane 92, which abuts against the first limiting plane 80, is provided on the inner side wall of the handle 9. The valve stem 8 and the handle 9 rotate synchronously under the combined limitation of the first limiting plane 80 and the second limiting plane 92.

[0027] like Figure 1 , Figure 2As shown, the handle 9 has multiple locking holes 90 arranged circumferentially on the side wall facing the valve body 1. A positioning pin 91 is fixedly installed on the valve body 1 for insertion into the locking holes 90. By interlocking the positioning pin 91 with the locking holes 90, the rotation of the handle 9 and the valve stem 8 can be restricted, thereby achieving self-locking of the valve core 3.

[0028] like Figure 3 , Figure 4 As shown, a spring 93 is sleeved on the outside of the valve stem 8 and located inside the handle 9. The spring 93 extends and retracts along the sliding direction of the handle 9. One end of the spring 93 abuts against the valve stem 8, and the other end of the spring 93 abuts against the inner side wall of the handle 9. The spring 93 is used to press the handle 9 downward against the outer side wall of the valve body 1. When the positioning pin 91 is inserted into the locking hole 90, the elastic force of the spring 93 can effectively prevent the handle 9 from disengaging from the positioning pin 91, ensuring the stability and reliability of the positioning pin 91 and the locking hole 90 when they are inserted into each other.

[0029] like Figure 3 , Figure 4 As shown, a press seat 81, extending outward from the handle 9, is coaxially positioned at the end of the valve stem 8 furthest from the valve core 3. The outer diameter of the press seat 81 is larger than the outer diameter of the valve stem 8. A third sealing ring 82, located inside the handle 9, is fitted and sealed against the inner wall of the handle 9. The third sealing ring 82 enhances the waterproof seal between the handle 9 and the press seat 81, making it difficult for external liquids to enter the handle 9, inhibiting the rate of erosion of the spring 93, and extending the service life of the spring 93.

[0030] When it is necessary to release the lock on the valve stem 8, the operator can press the press seat 81 with their thumb, and then lift the handle 9 upwards until the positioning pin 91 disengages from the locking hole 90. At this time, the spring 93 remains compressed. Then, the valve stem 8 and the valve core 3 can be rotated synchronously by turning the handle 9. After the adjustment of the valve core 3 is completed, simply remove the external force applied to the handle 9. At this time, the handle 9 will automatically press down and reset under the elastic force of the spring 93. The self-locking process is quick and easy to operate.

[0031] like Figure 4 , Figure 5 As shown, the valve seat 4 and the inlet connector 2 are coaxially arranged. A through hole runs through the central axis of the valve seat 4, and the through hole communicates with the interior of the inlet connector 2. When the valve core 3 is rotated to seal the through hole, the inlet connector 2 is in a closed state. Conversely, when the valve core 3 is rotated in the opposite direction to open the through hole, the medium in the inlet connector 2 can flow into the valve core 3 through the through hole and finally be discharged from the outlet of the valve body 1.

[0032] like Figure 3 , Figure 4 as well as Figure 5As shown, multiple pressure relief grooves 40 are arranged in a ring at uniform intervals on the outer circumference of the valve seat 4. In this embodiment, there are four pressure relief grooves 40. A sealing platform 400 is integrally formed on the outer wall of the valve seat 4 facing the liquid inlet connector 2. The sealing platform 400 and the liquid inlet connector 2 are coaxially arranged, and the sealing platform 400 and the outer wall of the liquid inlet connector 2 are in close contact and sealed. A drain ring groove 41 is formed between the outer plates of the valve seat 4 and the liquid inlet connector 2, located outside the sealing platform 400. The pressure relief groove 40 connects the drain ring groove 41 to the rotating shaft cavity 10. When the valve core 3 seals the through hole of the valve seat 4, the medium sealed in the narrow gap between the rotating shaft cavity 10 and the outside of the valve core 3 can be discharged into the drain ring groove 41 through the pressure relief groove 40.

[0033] like Figure 3 , Figure 4 as well as Figure 5 As shown, the inlet connector 2 is provided with multiple pressure relief holes 20 at an angle. One end of each pressure relief hole 20 is connected to the internal flow channel of the inlet connector 2, and the other end is connected to the drain ring groove 41. The medium in the drain ring groove 41 can flow back into the flow channel of the inlet connector 2 through the pressure relief holes 20, thereby achieving air pressure balance between the flow channel of the inlet connector 2 and the internal gap of the rotating shaft cavity 10, reducing the aging and fatigue rate of the sealing components, effectively mitigating the adverse effects of pressure buildup on the sealing components, extending service life, and improving safety.

[0034] like Figure 4 , Figure 5 As shown, a first sealing groove 11 is integrally formed on the inner wall of the valve body 1, and a first sealing ring 5 is fitted and limited within the first sealing groove 11 on the outer wall of the liquid inlet connector 2. The first sealing ring 5 is in close contact with the inner wall of the first sealing groove 11 for sealing. A second sealing groove 21 is integrally formed on the outer wall of the liquid inlet connector 2, and a second sealing ring 6 is disposed within the second sealing groove 21. The second sealing ring 6 is in close contact with the inner wall of the valve body 1 for sealing.

[0035] like Figure 4 As shown, a filter element 7 is internally threaded onto the outlet of the valve body 1. The filter element 7 is coaxially arranged with the valve body 1, and the filter element 7 and the inlet connector 2 are located on opposite sides of the valve core 3. The filter element 7 has a large number of filter holes 70, which are used to filter solid impurities in the medium, thereby improving the cleanliness of the medium.

[0036] The operating principle is as follows: When it is necessary to release the lock on the valve stem 8, the operator can press the press seat 81 with their thumb, and then lift the handle 9 upwards until the positioning pin 91 disengages from the locking hole 90. At this time, the spring 93 remains compressed. Then, the valve stem 8 and the valve core 3 can be rotated synchronously by turning the handle 9. After the adjustment of the valve core 3 is completed, simply remove the external force applied to the handle 9. At this time, the handle 9 will automatically press down and reset under the elastic force of the spring 93. The self-locking process is quick and easy to operate.

[0037] When the valve core 3 seals the through hole of the valve seat 4, the medium sealed in the narrow gap between the rotating shaft cavity 10 and the outside of the valve core 3 can be discharged into the drain ring groove 41 through the pressure relief groove 40. The medium in the drain ring groove 41 can flow back into the flow channel of the inlet connector 2 through the pressure relief hole 20, thereby achieving air pressure balance between the flow channel of the inlet connector 2 and the internal gap of the rotating shaft cavity 10, reducing the aging and fatigue rate of the sealing components, effectively mitigating the adverse effects of pressure buildup on the sealing components, extending service life, and improving safety.

[0038] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A self-locking ball stop valve, comprising a valve body (1), an inlet connector (2) disposed on the valve body (1), a rotating shaft cavity (10) formed within the valve body (1), and a valve core (3) disposed within the rotating shaft cavity (10) for controlling the opening and closing of the inlet connector (2); characterized in that: A valve seat (4) is provided inside the rotating shaft cavity (10), and the valve core (3) rotates and is limited on the valve seat (4); a pressure relief groove (40) is provided on the outer circumferential surface of the valve seat (4), and a pressure relief hole (20) is provided on the liquid inlet connector (2). One end of the pressure relief hole (20) is connected to the inside of the liquid inlet connector (2), and the other end of the pressure relief hole (20) is connected to the pressure relief groove (40).

2. The self-locking globe valve according to claim 1, characterized in that: A sealing platform (400) is provided on the outer wall of the valve seat (4) facing the liquid inlet connector (2), and the sealing platform (400) and the outer wall of the liquid inlet connector (2) are fitted together and sealed; a drain ring groove (41) is formed between the valve seat (4) and the liquid inlet connector (2) located outside the sealing platform (400), one side of the drain ring groove (41) is connected to the pressure relief hole (20), and the other side of the drain ring groove (41) is connected to the pressure relief groove (40).

3. The self-locking globe valve according to claim 2, characterized in that: The valve body (1) has a first sealing groove (11) on its inner side wall, and the liquid inlet connector (2) has a first sealing ring (5) that is limited to the first sealing groove (11) on its outer side wall. The first sealing ring (5) and the inner side wall of the first sealing groove (11) are fitted together and sealed.

4. The self-sealing globe valve of claim 2, wherein: The outer wall of the liquid inlet connector (2) is provided with a second sealing groove (21), and a second sealing ring (6) is provided in the second sealing groove (21). The second sealing ring (6) is in contact with the inner wall of the valve body (1) for sealing.

5. The self-sealing globe valve of claim 1, wherein: A filter element (7) is provided in the outlet of the valve body (1), and the filter element (7) and the inlet connector (2) are located on both sides of the valve core (3); a filter hole (70) is provided on the filter element (7).

6. The self-locking globe valve according to claim 1, wherein: A valve stem (8) is rotatably mounted on the valve body (1). The valve stem (8) is inserted into the valve core (3). A handle (9) is movably mounted on the outside of the valve stem (8). A locking hole (90) is provided on the handle (9). A positioning pin (91) for inserting into the locking hole (90) is provided on the valve body (1). A spring (93) is also provided on the valve stem (8) located inside the handle (9). The spring (93) extends and retracts along the sliding direction of the handle (9). The spring (93) is used to press the handle (9) against the outer wall of the valve body (1).

7. The self-locking globe valve according to claim 6, characterized in that: The valve stem (8) is provided with a pressing seat (81) extending out of the handle (9) at its end. The pressing seat (81) is provided with a third sealing ring (82) located inside the handle (9). The third sealing ring (82) is in contact with the inner wall of the handle (9) for sealing.

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