A high-safety ball valve with automatic pressure relief

Abstract

The present invention discloses a highly safe ball valve with automatic pressure relief, which relates to the technical field of ball valves. The ball valve includes components such as an inlet connection body, an outlet connection body, a first pressure relief component, a second pressure relief component, a third pressure relief component, a fourth pressure relief component, a fifth pressure relief component, a buffer component, a drive module, a valve stem, an intermediate valve seat, and a connecting rod. The pressure values required to open the first pressure relief component, the second pressure relief component, the third pressure relief component, the fourth pressure relief component, and the fifth pressure relief component increase in sequence. When the first pressure relief component is stably opened, the second pressure relief component begins to open; when the second pressure relief component is stably opened, the third pressure relief component begins to open; when the third pressure relief component is stably opened, the fourth pressure relief component begins to open; after the fourth pressure relief component is stably opened, the fifth pressure relief component is fully opened. The buffer component realizes rapid pressure relief while reducing the impact force of the medium on the ball, ensuring a firm connection between the ball and the valve stem and extending the service life of the ball valve.

Description

Technical Field

[0001] The present invention relates to the technical field of ball valves, and specifically to a highly safe ball valve with automatic pressure relief. Background Art

[0002] A traditional ball valve is a valve that realizes the on-off or regulation of fluid by rotating a sphere with a through hole, and has the advantages of simple structure, good sealing performance, and small flow resistance. However, when a traditional ball valve is in use, the ball valve itself will be subjected to huge pressure. Some valve bodies are impacted for a long time, and the sphere may shift from the valve stem, reducing the service life of the ball valve. Moreover, when the valve is closed, if the medium in the valve cavity expands due to temperature rise or external heat source (such as gasification of liquid medium), overpressure may be formed, threatening the structural safety of the valve and pipeline. It is necessary to relieve the pressure by self-pressure relief to reduce the pressure borne by the ball valve. Therefore, we need a highly safe ball valve with automatic pressure relief to solve the above problems. Summary of the Invention

[0003] The purpose of the present invention is to provide a highly safe ball valve with automatic pressure relief to solve the problems raised in the prior art.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] The ball valve includes an inlet connecting body, an inlet valve seat, an outlet valve seat, a sphere, an outlet connecting body, a first pressure relief component, a second pressure relief component, a third pressure relief component, a fourth pressure relief component, a fifth pressure relief component, a buffer component, a drive module, a valve stem, an intermediate valve seat, and a connecting rod. The connecting rod sequentially passes through the inlet connecting body, the intermediate valve seat, and the outlet connecting body. Both ends of the connecting rod are respectively threadedly connected to nuts. The inlet valve seat is clamped at the outlet end of the inlet connecting body. The outlet valve seat is clamped at the inlet end of the outlet connecting body. The sphere is clamped between the inlet valve seat and the outlet valve seat. The valve stem is inserted into the upper end of the intermediate valve seat and the sphere and is connected by a flat key. The central rotation axes of the valve stem and the sphere coincide. The output part of the drive module is fixedly connected to the top end of the valve stem. The buffer component is inserted into the inlet connecting body, and the buffer component is movably connected to the inlet connecting body. The buffer component is threadedly connected to a part of the drive module, and the buffer component meshes with the output part of the drive module. The first pressure relief component and the second pressure relief component are arranged in the inlet connecting body and are movably connected to the inlet connecting body. The third pressure relief component, the fourth pressure relief component, and the fifth pressure relief component are arranged in the outlet connecting body and are movably connected to the outlet connecting body. The fifth pressure relief component is electrically connected to the drive module.

[0006] The pressure values required to open the first pressure relief component, the second pressure relief component, the third pressure relief component, the fourth pressure relief component, and the fifth pressure relief component increase in sequence. When the first pressure relief component is stably opened, the second pressure relief component begins to open; when the second pressure relief component is stably opened, the third pressure relief component begins to open; when the third pressure relief component is stably opened, the fourth pressure relief component begins to open; after the fourth pressure relief component is stably opened, the fifth pressure relief component is fully opened; when the ball valve is in use, the inlet connector is connected to the inlet pipe, the outlet connector is connected to the outlet pipe, and the medium enters the ball valve from the inlet connector. When the ball valve is closed, the sphere blocks the medium in the inlet connector from flowing into the outlet connector. When the pressure of the medium in the inlet connector increases, it first reaches the pressure value required to open the first pressure relief component, and the medium in the inlet connector enters the intermediate valve seat through the first pressure relief component. The medium passes through the intermediate valve seat and flows to the second pressure relief component, the fourth pressure relief component, and the fifth pressure relief component respectively; when the first pressure relief component is stably opened, the second pressure relief component begins to open, and the medium enters the outlet connector through the second pressure relief component and is discharged from the outlet connector; when the second pressure relief component is stably opened, the third pressure relief component begins to open, and the medium flows from the inlet connector through the third pressure relief component into the intermediate valve seat and then into the outlet connector through the second pressure relief component; when the third pressure relief component is stably opened, the fourth pressure relief component begins to open, and the medium in the intermediate valve seat flows into the outlet connector through the second pressure relief component and the fourth pressure relief component; when the fourth pressure relief component is stably opened, the fifth pressure relief component begins to open. When the fifth pressure relief component is fully opened, the drive module is activated to rotate the sphere to completely connect the inlet connector and the outlet connector for rapid pressure relief. At the same time, the drive module drives the buffer component to move. The buffer component blocks part of the sphere when the ball valve is closed. During the opening process of the ball valve, it gradually contracts to reduce the blockage of the medium flowing from the inlet connector to the outlet connector, achieving rapid pressure relief while reducing the impact force of the medium on the sphere, ensuring a firm connection between the sphere and the valve stem, and extending the service life of the ball valve.

[0007] Further, a first channel and a third channel are provided in the inlet connector. The first channel connects the inlet connector and the intermediate valve seat. The first pressure relief component is arranged in the first channel and is connected to the first channel. The third channel connects the inlet connector and the intermediate valve seat. The third pressure relief component is arranged in the third channel and is rotationally connected to the third channel.

[0008] The first channel and the third channel provide two different pressure relief paths for the inlet connector to communicate with the intermediate valve seat. The first pressure relief component and the third pressure relief component block the first channel and the third channel respectively in the initial state, preventing the medium from flowing into the intermediate valve seat and ensuring the sealing performance of the ball valve. When the medium pressure in the inlet connector reaches the pressure value required for the third pressure relief component to open, the first pressure relief component opens stably, and the third pressure relief component begins to open gradually. The medium flows into the intermediate valve seat through the first pressure relief component and the third pressure relief component.

[0009] Further, a second channel, a fourth channel, and a fifth channel are provided in the outlet connector. The second channel connects the outlet connector and the intermediate valve seat. The second pressure relief component is arranged in the second channel and is connected to the second channel. The fourth channel connects the outlet connector and the intermediate valve seat. The fourth pressure relief component is arranged in the fourth channel and is rotatably connected to the fourth channel. The fifth channel communicates with the intermediate valve seat. The fifth pressure relief component is arranged in the fifth channel and is rotatably connected to the fifth channel.

[0010] The second channel and the fourth channel provide two different pressure relief paths for the outlet connector to communicate with the intermediate valve seat. The second pressure relief component and the fourth pressure relief component block the second channel and the fourth channel respectively in the initial state, preventing the medium from flowing into the outlet connector and ensuring the sealing performance of the ball valve. When the medium pressure in the intermediate valve seat reaches the pressure value required for the fourth pressure relief component to open, the second pressure relief component opens stably, and the fourth pressure relief component begins to open gradually. The medium flows into the outlet connector through the second pressure relief component and the fourth pressure relief component and then is discharged through the outlet connector. When the fourth pressure relief component opens stably, the fifth pressure relief component opens completely.

[0011] Further, the first pressure relief component includes a first spring and a first slider. One end of the first spring is fixedly connected to the first channel, and the other end of the first spring is fixedly connected to one end of the first slider. The other end of the first slider is conical, and both the upper and lower end faces are inclined planes. The first slider is slidably connected to the first channel.

[0012] In the initial state, the first slider completely blocks the first channel, preventing the medium from flowing from the inlet connector into the intermediate valve seat through the first channel. The other end of the first slider is conical, and both the upper and lower end faces are inclined planes. When the medium reaches the set pressure value, it is easier to push the first slider, compress the first spring, and open the first channel, thus connecting the inlet connector and the intermediate valve seat.

[0013] Further, the second pressure relief component includes a second spring and a second slider. One end of the second spring is fixedly connected to the second channel, and the other end of the second spring is fixedly connected to one end of the second slider. The other end of the second slider is conical, and both the upper and lower end faces are inclined planes. The second slider is slidably connected to the second channel.

[0014] In the initial state, the second slider completely blocks the second channel, and the medium cannot flow from the intermediate valve seat into the outlet connector through the second channel. When the compression amount of the first spring is stable, the medium pushes the second slider, compressing the second spring and opening the second channel, so that the outlet connector communicates with the intermediate valve seat.

[0015] Further, the third pressure relief component includes a first plug, a first rotating plate, and a first counterweight. The first plug is disposed on the surface of the first rotating plate facing the inlet connector. The first plug is fixedly connected to one end of the first rotating plate, and the first counterweight is fixedly connected to the other end of the first rotating plate. The first counterweight and the first plug are disposed on the same end face of the first rotating plate. A through hole in the same direction as the long axis of the first rotating plate is provided on the first counterweight. The first rotating plate is disposed in the third channel. The center point of the first rotating plate in the long axis direction is rotatably connected to the third channel. The peripheral end faces of the first rotating plate are hermetically fitted with the peripheral wall surfaces of the third channel.

[0016] In the initial state, the first counterweight causes the end of the first rotating plate where the first plug is located to tilt upward by its own gravity, and the first plug completely blocks the inlet of the third channel. When the compression amount of the second spring is stable, the medium begins to press down on the first plug, causing the end of the first rotating plate where the first counterweight is located to tilt upward, and the first plug no longer blocks the inlet of the third channel. The medium flows into the intermediate valve seat through the through hole in the first counterweight and the third channel.

[0017] Further, the fourth pressure relief component includes a second plug, a second rotating plate, and a second counterweight. The second plug is disposed on the surface of the second rotating plate facing the outlet connector. The second plug is fixedly connected to one end of the second rotating plate, and the second counterweight is disposed on the same end face of the second rotating plate as the second plug. A through hole in the same direction as the long axis of the second rotating plate is provided on the second counterweight. The second counterweight is fixedly connected to the other end of the second rotating plate. The second rotating plate is disposed in the fourth channel. The second rotating plate is rotatably connected to the third channel at a point deviating from the center point in the long axis direction and close to the second counterweight. The peripheral end faces of the second rotating plate are hermetically fitted with the peripheral wall surfaces of the fourth channel.

[0018] In the initial state, the second counterweight causes the end of the second rotating plate where the second blocking block is located to tilt upward due to its own gravity. The second blocking block completely blocks the entrance of the fourth channel. When the first rotating plate tends to stabilize and stops rotating, the medium begins to press down on the second blocking block, causing the end of the second rotating plate where the second counterweight is located to tilt upward. The second blocking block no longer blocks the entrance of the fourth channel, and the medium in the intermediate valve seat flows into the outlet connector through the through hole in the second counterweight and the fourth channel.

[0019] Further, the fifth pressure relief component includes a third blocking block, a third rotating plate, a third counterweight, and a drive switch. The third blocking block is disposed on the surface of the third rotating plate facing the outlet connector. The third blocking block is fixedly connected to one end of the third rotating plate. The third counterweight and the third blocking block are disposed on the same end surface of the third rotating plate. The third counterweight is fixedly connected to the other end of the third rotating plate. The third rotating plate is disposed in the fifth channel. The center point of the third rotating plate in the long axis direction is rotationally connected to the fifth channel. The peripheral end surfaces of the third rotating plate are hermetically fitted with the peripheral wall surfaces of the fifth channel. The drive switch is fixedly connected to the fifth channel. The drive switch is located below the third blocking block. The third rotating plate separates the drive switch from the third blocking block. The drive switch is electrically connected to the drive module.

[0020] In the initial state, the third counterweight causes the end of the third rotating plate where the third blocking block is located to tilt upward due to its own gravity. The third blocking block completely blocks the entrance of the fifth channel. When the second rotating plate tends to stabilize and stops rotating, the medium begins to press down on the third blocking block, causing the end of the third rotating plate where the third counterweight is located to tilt upward. The third rotating plate at one end of the third blocking block continuously descends until it presses on the drive switch. The third blocking block always blocks the entrance of the fifth channel. After the drive switch is turned on, the drive module starts, the valve stem drives the sphere to rotate, and the ball valve is opened. When the medium pressure is less than the pressure of the third counterweight, the end of the third blocking block on the third rotating plate tilts upward, releasing the drive switch, and the drive module resets. The valve stem rotates the sphere back to close the ball valve.

[0021] Further, the buffer component includes a rotating rod, a driven gear, a pull rod, a buffer plate, and a fixed seat. The rotating rod passes through part of the drive module and is threadedly connected to part of the drive module. The rotating rod sequentially passes through the driven gear and the top of the fixed seat and is rotationally connected to the pull rod. The rotating rod is threadedly connected to the driven gear. The driven gear meshes with the output part of the drive module. The driven gear is rotationally connected to the top of the fixed seat. The fixed seat is fixedly connected to the inlet connector. The pull rod is inserted into the inlet connector and is hinged to one end of the buffer plate. The other end of the buffer plate is hinged to the inner wall surface of the inlet connector.

[0022] When the ball valve is closed, the included angle between the buffer plate and the flow direction of the medium flowing from the inlet connector to the outlet connector is the largest; when the ball valve starts to open, the included angle between the buffer plate and the flow direction of the medium flowing from the inlet connector to the outlet connector gradually decreases. As the valve opens wider, the resistance to the medium flow becomes smaller, protecting the sphere from the impact of the medium while reducing the influence on the flow rate of the medium. The fixed seat is responsible for restricting the displacement of the driven gear along the central axis of the rotating rod. When the drive module is activated, it drives the driven gear to rotate. The driven gear is threadedly connected to the rotating rod, causing the rotating rod to rise. The rotating rod drives the pull rod, and the pull rod pulls the buffer plate. When the ball valve is fully opened, the buffer plate is parallel to the medium flow direction, minimizing the resistance of the buffer plate to the medium flow and facilitating the rapid flow of the medium.

[0023] Furthermore, the drive module includes a drive motor, a fixed plate, and a transmission gear. The output shaft of the drive motor is fixedly connected to the valve stem. The fixed plate is welded to the drive motor. The fixed plate is threadedly connected to the rotating rod. The transmission gear is welded to the output shaft of the drive motor. The transmission gear meshes with the driven gear. The drive motor is electrically connected to the drive switch.

[0024] After the drive switch is turned on, the drive motor starts. The output shaft of the drive motor drives the valve stem to rotate 90°, opening the ball valve. At the same time, the transmission gear on the output shaft drives the driven gear to rotate, causing the rotating rod to rise. When the drive switch is turned off, the output shaft of the drive motor automatically resets, driving the sphere to rotate through the valve stem to close the ball valve.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. The present invention realizes the automatic pressure relief adjustment of the ball valve during the process of increasing medium pressure by setting the medium pressure values for continuous triggering and starting among the first pressure relief component, the second pressure relief component, the third pressure relief component, the fourth pressure relief component, and the fifth pressure relief component;

[0027] 2. The third pressure relief component, the fourth pressure relief component, and the fifth pressure relief component of the present invention all achieve adaptive adjustment during the pressure relief process through the lever principle. As the medium pressure continuously increases, the first plug is continuously pressed down until the first rotating plate is stable, then the second plug is continuously pressed down until the second rotating plate is stable, and then the third plug is continuously pressed down until the drive switch is turned on and the drive motor starts to open the ball valve. After the pressure relief reaches the set value, under the action of the gravity of the third counterweight, the end of the third rotating plate where the third plug is located rises, releasing the drive switch, and the output shaft of the drive motor rotates back to its original position to close the ball valve;

[0028] 3. When the ball valve of the present invention is closed, the included angle between the buffer plate and the flow direction of the medium flowing from the inlet connector to the outlet connector is the largest; when the ball valve starts to open, the included angle between the buffer plate and the flow direction of the medium flowing from the inlet connector to the outlet connector gradually decreases. As the valve opens wider, the resistance to the medium flow becomes smaller, protecting the sphere from the impact of the medium while reducing the influence on the flow rate of the medium; when the ball valve is fully open, the buffer plate is parallel to the medium flow direction, minimizing the resistance of the buffer plate to the medium flow and facilitating the rapid flow of the medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of the overall external structure of a highly safe ball valve with automatic pressure relief according to the present invention;

[0030] Figure 2 is a schematic sectional structure diagram of a highly safe ball valve with automatic pressure relief according to the present invention;

[0031] Figure 3 is another schematic sectional structure diagram of a highly safe ball valve with automatic pressure relief according to the present invention;

[0032] Figure 4 is a schematic diagram of the buffer assembly structure of a highly safe ball valve with automatic pressure relief according to the present invention;

[0033] Figure 5 is a schematic diagram of the drive module structure of a highly safe ball valve with automatic pressure relief according to the present invention;

[0034] Figure 6 is Figure 2 a partially enlarged schematic diagram of A;

[0035] Figure 7 is Figure 2 a partially enlarged schematic diagram of B;

[0036] Figure 8 is Figure 2 a partially enlarged schematic diagram of C.

[0037] In the figure: 1. Inlet connector; 2. Inlet valve seat; 3. Outlet valve seat; 4. Sphere; 5. Outlet connector; 6. First pressure relief component; 7. Second pressure relief component; 8. Third pressure relief component; 9. Fourth pressure relief component; 10. Fifth pressure relief component; 11. Buffer component; 12. Drive module; 13. Valve stem; 14. Intermediate valve seat; 15. Connecting rod; 51. Second channel; 52. Fourth channel; 53. Fifth channel; 61. First spring; 62. First slider; 71. Second spring; 72. Second slider; 81. First plug; 82. First rotating plate; 83. First counterweight; 91. Second plug; 92. Second rotating plate; 93. Second counterweight; 101. Third plug; 102. Third rotating plate; 103. Third counterweight; 104. Drive switch; 111. First channel; 112. Third channel; 113. Rotating rod; 114. Driven gear; 115. Pull rod; 116. Buffer plate; 117. Fixed seat; 121. Drive motor; 122. Fixed plate; 123. Driving gear. Detailed implementation manners

[0038] Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] Embodiment: As Figure 1 - Figure 8 shown, the present invention provides a technical solution for a highly safe ball valve with automatic pressure relief:

[0040] As Figures 1 to 3As shown in the figure, the ball valve includes an inlet connection body 1, an inlet valve seat 2, an outlet valve seat 3, a ball 4, an outlet connection body 5, a first pressure relief component 6, a second pressure relief component 7, a third pressure relief component 8, a fourth pressure relief component 9, a fifth pressure relief component 10, a buffer component 11, a drive module 12, a valve stem 13, an intermediate valve seat 14 and a connecting rod 15. The connecting rod 15 sequentially passes through the inlet connection body 1, the intermediate valve seat 14 and the outlet connection body 5. Both ends of the connecting rod 15 are respectively threadedly connected to nuts. The inlet valve seat 2 is snap-connected to the outlet end of the inlet connection body 1. The outlet valve seat 3 is snap-connected to the inlet end of the outlet connection body 5. The ball 4 is snap-connected between the inlet valve seat 2 and the outlet valve seat 3. The valve stem 13 is inserted into the intermediate valve seat 14 and is connected to the upper end of the ball 4 by a flat key. The central rotation axes of the valve stem 13 and the ball 4 coincide. The output part of the drive module 12 is fixedly connected to the top end of the valve stem 13. The buffer component 11 is inserted into the inlet connection body 1. The buffer component 11 is movably connected to the inlet connection body 1. The buffer component 11 is threadedly connected to a part of the drive module 12. The buffer component 11 meshes with the output part of the drive module 12. The first pressure relief component 6 and the second pressure relief component 7 are arranged in the inlet connection body 1 and are movably connected to the inlet connection body 1. The third pressure relief component 8, the fourth pressure relief component 9 and the fifth pressure relief component 10 are arranged in the outlet connection body 5 and are movably connected to the outlet connection body 5. The fifth pressure relief component 10 is electrically connected to the drive module 12.

[0041] The pressure values required for the first pressure relief component 6, the second pressure relief component 7, the third pressure relief component 8, the fourth pressure relief component 9, and the fifth pressure relief component 10 to open increase in sequence. When the first pressure relief component 6 is stably opened, the second pressure relief component 7 starts to open; when the second pressure relief component 7 is stably opened, the third pressure relief component 8 starts to open; when the third pressure relief component 8 is stably opened, the fourth pressure relief component 9 starts to open; after the fourth pressure relief component 9 is stably opened, the fifth pressure relief component 10 is fully opened; when the ball valve is in use, the inlet connector 1 is connected to the inlet pipe, the outlet connector 5 is connected to the outlet pipe, the medium enters the ball valve from the inlet connector 1. When the ball valve is closed, the sphere 4 blocks the medium in the inlet connector 1 from flowing into the outlet connector 5. When the pressure of the medium in the inlet connector 1 increases, first it reaches the pressure value required for the first pressure relief component 6 to open, and the medium in the inlet connector 1 enters the intermediate valve seat 14 through the first pressure relief component 6. The medium passes through the intermediate valve seat 14 and flows to the second pressure relief component 7, the fourth pressure relief component 9, and the fifth pressure relief component 10 respectively; as the pressure value continues to increase and reaches the pressure value required for the second pressure relief component 7 to open, the medium enters the outlet connector 5 through the second pressure relief component 7 and is discharged from the outlet connector 5; as the pressure value continues to increase and reaches the pressure value required for the third pressure relief component 8 to open, the medium in the inlet connector 1 flows into the intermediate valve seat 14 through the third pressure relief component 8 and then flows into the outlet connector 5 through the second pressure relief component 7; as the pressure value continues to increase and reaches the pressure value required for the fourth pressure relief component 9 to open, the medium in the intermediate valve seat 14 flows into the outlet connector 5 through the second pressure relief component 7 and the fourth pressure relief component 9; as the pressure value continues to increase and reaches the pressure value required for the fifth pressure relief component 10 to open, when the fifth pressure relief component 10 is fully opened, the drive module 12 is activated to rotate the sphere 4 to completely connect the inlet connector 1 and the outlet connector 5 for rapid pressure relief. At the same time, the drive module 12 drives the buffer component 11 to move. The buffer component 11 blocks part of the sphere 4 when the ball valve is closed. During the opening process of the ball valve, it gradually contracts to reduce the blockage of the medium flowing from the inlet connector 1 to the outlet connector 5, achieving rapid pressure relief while reducing the impact force of the medium on the sphere 4, ensuring the stable connection between the sphere 4 and the valve stem 13, and extending the service life of the ball valve.

[0042] As Figure 2 , Figure 3 and Figure 6 shown, a first channel 111 and a third channel 112 are provided in the inlet connector 1. The first channel 111 connects the inlet connector 1 and the intermediate valve seat 14. The first pressure relief component 6 is arranged in the first channel 111, and the first pressure relief component 6 is connected to the first channel 111. The third channel 112 connects the inlet connector 1 and the intermediate valve seat 14. The third pressure relief component 8 is arranged in the third channel 112, and the third pressure relief component 8 is rotatably connected to the third channel 112.

[0043] The first channel 111 and the third channel 112 provide two different pressure relief paths for the inlet connector 1 to communicate with the intermediate valve seat 14. The first pressure relief component 6 and the third pressure relief component 8 block the first channel 111 and the third channel 112 respectively in the initial state, so that the medium cannot flow into the intermediate valve seat 14, ensuring the sealing performance of the ball valve. When the medium pressure in the inlet connector 1 reaches the pressure value required for the third pressure relief component 8 to open, the first pressure relief component 6 opens stably, and the third pressure relief component 8 begins to open gradually. The medium flows into the intermediate valve seat 14 through the first pressure relief component 6 and the third pressure relief component 8.

[0044] As Figure 2 、 Figure 6 、 Figure 7 and Figure 8 shown, the outlet connector 5 is provided with a second channel 51, a fourth channel 52 and a fifth channel 53. The second channel 51 communicates the outlet connector 5 with the intermediate valve seat 14. The second pressure relief component 7 is arranged in the second channel 51, and the second pressure relief component 7 is connected to the second channel 51. The fourth channel 52 communicates the outlet connector 5 with the intermediate valve seat 14. The fourth pressure relief component 9 is arranged in the fourth channel 52, and the fourth pressure relief component 9 is rotatably connected to the fourth channel 52. The fifth channel 53 communicates with the intermediate valve seat 14. The fifth pressure relief component 10 is arranged in the fifth channel 53, and the fifth pressure relief component 10 is rotatably connected to the fifth channel 53.

[0045] The second channel 51 and the fourth channel 52 provide two different pressure relief paths for the outlet connector 5 to communicate with the intermediate valve seat 14. The second pressure relief component 7 and the fourth pressure relief component 9 block the second channel 51 and the fourth channel 52 respectively in the initial state, so that the medium cannot flow into the outlet connector 5, ensuring the sealing performance of the ball valve. When the medium pressure in the intermediate valve seat 14 reaches the pressure value required for the fourth pressure relief component 9 to open, the second pressure relief component 7 opens stably, and the fourth pressure relief component 9 begins to open gradually. The medium flows into the outlet connector 5 through the second pressure relief component 7 and the fourth pressure relief component 9, and then is discharged through the outlet connector 5. When the fourth pressure relief component 9 opens stably, the fifth pressure relief component 10 opens completely.

[0046] As Figure 3 shown, the first pressure relief component 6 includes a first spring 61 and a first slider 62. One end of the first spring 61 is fixedly connected to the first channel 111, and the other end of the first spring 61 is fixedly connected to one end of the first slider 62. The other end of the first slider 62 is conical, and both the upper and lower end faces are inclined planes. The first slider 62 is slidably connected to the first channel 111.

[0047] In the initial state, the first slider 62 completely blocks the first channel 111, and the medium cannot flow from the inlet connector 1 into the intermediate valve seat 14 through the first channel 111. The other end of the first slider 62 is conical, and both the upper and lower end faces are inclined planes. When the medium reaches the set pressure value, it is easier to push the first slider 62, compress the first spring 61, open the first channel 111, and connect the inlet connector 1 and the intermediate valve seat 14.

[0048] As Figure 3 shown, the second pressure relief component 7 includes a second spring 71 and a second slider 72. One end of the second spring 71 is fixedly connected to the second channel 51, and the other end of the second spring 71 is fixedly connected to one end of the second slider 72. The other end of the second slider 72 is conical, and both the upper and lower end faces are inclined planes. The second slider 72 is slidably connected to the second channel 51.

[0049] In the initial state, the second slider 72 completely blocks the second channel 51, and the medium cannot flow from the intermediate valve seat 14 into the outlet connector 5 through the second channel 51. When the compression amount of the first spring 61 is stable, the medium pushes the second slider 72, compresses the second spring 71, opens the second channel 51, and connects the outlet connector 5 and the intermediate valve seat 14.

[0050] As Figure 6 shown, the third pressure relief component 8 includes a first plug 81, a first rotating plate 82, and a first counterweight 83. The first plug 81 is disposed on the surface of the first rotating plate 82 facing the inlet connector 1. The first plug 81 is fixedly connected to one end of the first rotating plate 82, and the first counterweight 83 is fixedly connected to the other end of the first rotating plate 82. The first counterweight 83 and the first plug 81 are disposed on the same end face of the first rotating plate 82. A through hole in the same direction as the long axis of the first rotating plate 82 is provided on the first counterweight 83. The first rotating plate 82 is disposed in the third channel 112. The center point of the first rotating plate 82 in the long axis direction is rotatably connected to the third channel 112. The peripheral end faces of the first rotating plate 82 are hermetically fitted with the peripheral wall surfaces of the third channel 112.

[0051] In the initial state, the first counterweight 83 causes the end of the first rotating plate 82 where the first plug 81 is located to tilt by its own gravity, and the first plug 81 completely blocks the inlet of the third channel 112. When the compression amount of the second spring 71 is stable, the medium begins to press down on the first plug 81, causing the end of the first rotating plate 82 where the first counterweight 83 is located to tilt, and the first plug 81 no longer blocks the inlet of the third channel 112. The medium flows into the intermediate valve seat 14 through the through hole in the first counterweight 83 and the third channel 112.

[0052] As Figure 7As shown, the fourth pressure relief component 9 includes a second plug 91, a second rotating plate 92, and a second counterweight 93. The second plug 91 is disposed on the surface of the second rotating plate 92 facing the inside of the outlet connector 5. One end of the second plug 91 is fixedly connected to the second rotating plate 92. The second counterweight 93 and the second plug 91 are disposed on the same end surface of the second rotating plate 92. A through hole in the same direction as the long axis of the second rotating plate 92 is provided on the second counterweight 93. The other end of the second counterweight 93 is fixedly connected to the second rotating plate 92. The second rotating plate 92 is disposed in the fourth channel 52. The second rotating plate 92 is rotatably connected to the third channel 112 at a position deviating from the center point in the long axis direction and close to the second counterweight 93. The peripheral end surfaces of the second rotating plate 92 are in sealing fit with the peripheral wall surfaces of the fourth channel 52.

[0053] In the initial state, the second counterweight 93 causes one end of the second rotating plate 92 where the second plug 91 is located to tilt by its own gravity, and the second plug 91 completely blocks the inlet of the fourth channel 52. When the first rotating plate 82 tends to be stable and stops rotating, the medium begins to press down on the second plug 91, causing the end of the second rotating plate 92 where the second counterweight 93 is located to tilt. The second plug 91 no longer blocks the inlet of the fourth channel 52, and the medium in the intermediate valve seat 14 flows into the outlet connector 5 through the through hole in the second counterweight 93 and the fourth channel 52.

[0054] As Figure 8 As shown, the fifth pressure relief component 10 includes a third plug 101, a third rotating plate 102, a third counterweight 103, and a drive switch 104. The third plug 101 is disposed on the surface of the third rotating plate 102 facing the inside of the outlet connector 5. One end of the third plug 101 is fixedly connected to the third rotating plate 102. The third counterweight 103 and the third plug 101 are disposed on the same end surface of the third rotating plate 102. The other end of the third counterweight 103 is fixedly connected to the third rotating plate 102. The third rotating plate 102 is disposed in the fifth channel 53. The center point of the third rotating plate 102 in the long axis direction is rotatably connected to the fifth channel 53. The peripheral end surfaces of the third rotating plate 102 are in sealing fit with the peripheral wall surfaces of the fifth channel 53. The drive switch 104 is fixedly connected to the fifth channel 53. The drive switch 104 is located below the third plug 101. The third rotating plate 102 separates the drive switch 104 from the third plug 101. The drive switch 104 is electrically connected to the drive module 12.

[0055] In the initial state, the third counterweight 103 causes the end of the third rotating plate 102 where the third blocking block 101 is located to tilt upward by its own gravity. The third blocking block 101 completely blocks the entrance of the fifth channel 53. When the second rotating plate 92 tends to stabilize and stop rotating, the medium begins to press down on the third blocking block 101, causing the end of the third rotating plate 102 where the third counterweight 103 is located to tilt upward. The third rotating plate 102 at one end of the third blocking block 101 continuously descends until it presses on the drive switch 104. The third blocking block 101 always blocks the entrance of the fifth channel 53. After the drive switch 104 is turned on, the drive module 12 starts, the valve stem 13 drives the sphere 4 to rotate, and the ball valve is opened. When the medium pressure is less than the pressure of the third counterweight 103, one end of the third blocking block 101 on the third rotating plate 102 tilts upward, releasing the drive switch 104, and the drive module 12 resets. The valve stem 13 rotates the sphere 4 back to close the ball valve.

[0056] As Figure 3 and Figure 4 shown, the buffer assembly 11 includes a rotating rod 113, a driven gear 114, a pull rod 115, a buffer plate 116, and a fixed seat 117. The rotating rod 113 passes through part of the drive module 12 and is threadedly connected to part of the drive module 12. The rotating rod 113 sequentially passes through the driven gear 114 and the top of the fixed seat 117 and is rotatably connected to the pull rod 115. The rotating rod 113 is threadedly connected to the driven gear 114. The driven gear 114 meshes with the output part of the drive module 12. The driven gear 114 is rotatably connected to the top of the fixed seat 117. The fixed seat 117 is fixedly connected to the inlet connecting body 1. The pull rod 115 is inserted into the inlet connecting body 1 and is hinged to one end of the buffer plate 116. The other end of the buffer plate 116 is hinged to the inner wall surface of the inlet connecting body 1.

[0057] When the ball valve is closed, the included angle between the buffer plate 116 and the flow direction of the medium flowing from the inlet connecting body 1 to the outlet connecting body 5 is the largest; when the ball valve starts to open, the included angle between the buffer plate 116 and the flow direction of the medium flowing from the inlet connecting body 1 to the outlet connecting body 5 gradually decreases. The larger the valve opens, the smaller the resistance to the medium flow, protecting the sphere 4 from the impact of the medium while reducing the influence on the flow rate of the medium. The fixed seat 117 is responsible for restricting the displacement of the driven gear 114 along the central axis of the rotating rod 113. When the drive module 12 starts, it drives the driven gear 114 to rotate. The driven gear 114 is threadedly connected to the rotating rod 113, causing the rotating rod 113 to rise. The rotating rod 113 drives the pull rod 115, and the pull rod 115 pulls the buffer plate 116. When the ball valve is fully opened, the buffer plate 116 is parallel to the medium flow direction, minimizing the resistance of the buffer plate 116 to the medium flow and facilitating the rapid flow of the medium.

[0058] As Figure 1 and Figure 5As shown, the driving module 12 includes a driving motor 121, a fixing plate 122 and a transmission gear 123. The output shaft of the driving motor 121 is fixedly connected to the valve stem 13. The fixing plate 122 is welded to the driving motor 121. The fixing plate 122 is threadedly connected to the rotating rod 113. The transmission gear 123 is welded to the output shaft of the driving motor 121. The transmission gear 123 meshes with the driven gear 114. The driving motor 121 is electrically connected to the driving switch 104.

[0059] After the driving switch 104 is turned on, the driving motor 121 starts. The output shaft of the driving motor 121 drives the valve stem 13 to rotate 90°, opening the ball valve. At the same time, the transmission gear 123 on the output shaft drives the driven gear 114 to rotate, causing the rotating rod 113 to rise. When the driving switch 104 is turned off, the output shaft of the driving motor 121 automatically resets, driving the sphere 4 to rotate through the valve stem 13 to close the ball valve.

[0060] Working principle of the present invention: The pressure values required for the first pressure relief component 6, the second pressure relief component 7, the third pressure relief component 8, the fourth pressure relief component 9, and the fifth pressure relief component 10 to open increase in sequence. When the first pressure relief component 6 is stably opened, the second pressure relief component 7 starts to open; when the second pressure relief component 7 is stably opened, the third pressure relief component 8 starts to open; when the third pressure relief component 8 is stably opened, the fourth pressure relief component 9 starts to open; after the fourth pressure relief component 9 is stably opened, the fifth pressure relief component 10 is fully opened; when the ball valve is in use, the inlet connector 1 is connected to the inlet pipeline, and the outlet connector 5 is connected to the outlet pipeline. The medium enters the ball valve from the inlet connector 1. When the ball valve is closed, the sphere 4 blocks the medium in the inlet connector 1 from flowing into the outlet connector 5. When the pressure of the medium in the inlet connector 1 increases, first, it reaches the pressure value required for the first pressure relief component 6 to open. The medium in the inlet connector 1 enters the intermediate valve seat 14 through the first pressure relief component 6, and the medium flows to the second pressure relief component 7, the fourth pressure relief component 9, and the fifth pressure relief component 10 respectively through the intermediate valve seat 14; when the first pressure relief component 6 is stably opened, the second pressure relief component 7 starts to open, and the medium enters the outlet connector 5 through the second pressure relief component 7 and is discharged from the outlet connector 5; when the second pressure relief component 7 is stably opened, the third pressure relief component 8 starts to open, and the medium in the inlet connector 1 flows into the intermediate valve seat 14 through the third pressure relief component 8 and then flows into the outlet connector 5 through the second pressure relief component 7; when the third pressure relief component 8 is stably opened, the fourth pressure relief component 9 starts to open, and the medium in the intermediate valve seat 14 flows into the outlet connector 5 through the second pressure relief component 7 and the fourth pressure relief component 9; when the fourth pressure relief component 9 is stably opened, the fifth pressure relief component 10 starts to open. When the fifth pressure relief component 10 is fully opened, the drive module 12 is activated to rotate the sphere 4 to completely connect the inlet connector 1 and the outlet connector 5 for rapid pressure relief. At the same time, the drive module 12 drives the buffer component 11 to move. The buffer component 11 blocks part of the sphere 4 when the ball valve is closed. During the opening process of the ball valve, it gradually contracts to reduce the blockage of the medium flowing from the inlet connector 1 to the outlet connector 5, realizing rapid pressure relief while reducing the impact force of the medium on the sphere 4, ensuring the stable connection between the sphere 4 and the valve stem 13, and extending the service life of the ball valve.

[0061] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high-safety ball valve capable of automatic pressure relief, characterized in that: The ball valve comprises an inlet connector (1), an inlet valve seat (2), an outlet valve seat (3), a ball (4), an outlet connector (5), a first pressure relief assembly (6), a second pressure relief assembly (7), a third pressure relief assembly (8), a fourth pressure relief assembly (9), a fifth pressure relief assembly (10), a buffer assembly (11), a drive module (12), a valve stem (13), an intermediate valve seat (14) and a connecting rod (15), wherein the connecting rod (15) passes through the inlet connector (1), the intermediate valve seat (14) and the outlet connector (5) in sequence, and both ends of the connecting rod (15) are respectively threadedly connected to nuts, the inlet valve seat (2) is clamped at the outlet end of the inlet connector (1), the outlet valve seat (3) is clamped at the inlet end of the outlet connector (5), the ball (4) is clamped between the inlet valve seat (2) and the outlet valve seat (3), and the valve stem (13) is inserted into the intermediate valve seat (14) and The upper end of the sphere (4) is connected by a flat key, the central rotation axis of the valve stem (13) and the sphere (4) coincide, the output portion of the drive module (12) is fixedly connected to the top of the valve stem (13), the buffer component (11) is inserted into the inlet connector (1), the buffer component (11) and the inlet connector (1) are movably connected, the buffer component (11) and a part of the drive module (12) are threadedly connected, the buffer component (11) and the output portion of the drive module (12) are meshed, the first pressure relief component (6) and the second pressure relief component (7) are arranged in the inlet connector (1) and are movably connected to the inlet connector (1), the third pressure relief component (8), the fourth pressure relief component (9) and the fifth pressure relief component (10) are arranged in the outlet connector (5) and are movably connected to the outlet connector (5), and the fifth pressure relief component (10) is electrically connected to the drive module (12); The inlet connecting body (1) is provided with a first groove (111) and a third groove (112); the first groove (111) connects the inlet connecting body (1) and the intermediate valve seat (14); the first pressure relief component (6) is arranged in the first groove (111); the first pressure relief component (6) and the first groove (111) are connected; the third groove (112) connects the inlet connecting body (1) and the intermediate valve seat (14); the third pressure relief component (8) is arranged in the third groove (112); the third pressure relief component (8) and the third groove (112) are rotatably connected; The outlet connecting body (5) is provided with a second groove (51), a fourth groove (52) and a fifth groove (53); the second groove (51) connects the outlet connecting body (5) and the intermediate valve seat (14); the second pressure relief assembly (7) is arranged in the second groove (51); the second pressure relief assembly (7) and the second groove (51) are connected; the fourth groove (52) connects the outlet connecting body (5) and the intermediate valve seat (14); the fourth pressure relief assembly (9) is arranged in the fourth groove (52); the fourth pressure relief assembly (9) and the fourth groove (52) are rotatably connected; the fifth groove (53) and the intermediate valve seat (14) are connected; the fifth pressure relief assembly (10) is arranged in the fifth groove (53); the fifth pressure relief assembly (10) and the fifth groove (53) are rotatably connected.

2. A high-safety ball valve capable of automatic pressure relief according to claim 1, characterized in that: The first pressure relief assembly (6) comprises a first spring (61) and a first slider (62); one end of the first spring (61) is fixedly connected to the first groove (111); the other end of the first spring (61) is fixedly connected to one end of the first slider (62); the other end of the first slider (62) is conical, and the upper and lower end surfaces are both inclined surfaces; the first slider (62) is slidably connected to the first groove (111).

3. A high-safety ball valve capable of automatically releasing pressure according to claim 2, characterized in that: The second pressure relief assembly (7) comprises a second spring (71) and a second slider (72); one end of the second spring (71) is fixedly connected to the second groove (51); the other end of the second spring (71) is fixedly connected to one end of the second slider (72); the other end of the second slider (72) is conical, and both the upper and lower end surfaces are inclined surfaces; the second slider (72) is slidably connected to the second groove (51).

4. A high-safety ball valve capable of automatically releasing pressure according to claim 3, characterized in that: The third pressure relief assembly (8) comprises a first blocking block (81), a first rotating plate (82) and a first counterweight (83); the first blocking block (81) is arranged on a surface of the first rotating plate (82) facing the inside of the inlet connector (1); the first blocking block (81) is fixedly connected to one end of the first rotating plate (82); the first counterweight (83) is fixedly connected to the other end of the first rotating plate (82); the first counterweight (83) and the first blocking block (81) are arranged on the same end surface of the first rotating plate (82); a through hole in the same direction as the long axis of the first rotating plate (82) is arranged on the first counterweight (83); the first rotating plate (82) is arranged in the third groove (112); the first rotating plate (82) is rotatably connected to the third groove (112) at a center point in the long axis direction; the peripheral end surfaces of the first rotating plate (82) are sealed and fitted with the peripheral wall surfaces of the third groove (112).

5. A high-safety ball valve capable of automatically releasing pressure according to claim 4, characterized in that: The fourth pressure relief assembly (9) comprises a second blocking block (91), a second rotating plate (92) and a second counterweight block (93); the second blocking block (91) is arranged on a surface of the second rotating plate (92) facing the inside of the outlet connector (5); one end of the second blocking block (91) and the second rotating plate (92) are fixedly connected; the second counterweight block (93) and the second blocking block (91) are arranged on the same end surface of the second rotating plate (92); a through hole in the same direction as the long axis of the second rotating plate (92) is arranged on the second counterweight block (93); the other end of the second counterweight block (93) and the second rotating plate (92) are fixedly connected; the second rotating plate (92) is arranged in the fourth groove (52); the second rotating plate (92) is rotatably connected to the third groove (112) at a position close to the second counterweight block (93) and deviating from the center point in the long axis direction; the peripheral end surfaces of the second rotating plate (92) are sealed and fitted with the peripheral wall surfaces of the fourth groove (52).

6. A high-safety ball valve capable of automatically releasing pressure according to claim 5, characterized in that: The fifth pressure relief assembly (10) comprises a third blocking block (101), a third rotating plate (102), a third counterweight block (103) and a drive switch (104); the third blocking block (101) is arranged on a surface of the third rotating plate (102) facing the inside of the outlet connector (5); one end of the third blocking block (101) and the third rotating plate (102) are fixedly connected; the third counterweight block (103) and the third blocking block (101) are arranged on the same end surface of the third rotating plate (102); the other end of the third counterweight block (103) and the third rotating plate (102) are fixedly connected; The rotating plate (102) is arranged in the fifth groove (53); the third rotating plate (102) is rotatably connected to the fifth groove (53) at the center point in the long axis direction; the peripheral end surfaces of the third rotating plate (102) are sealed and fitted with the peripheral wall surfaces of the fifth groove (53); the driving switch (104) is fixedly connected to the fifth groove (53); the driving switch (104) is located below the third blocking block (101); the third rotating plate (102) separates the driving switch (104) from the third blocking block (101); and the driving switch (104) is electrically connected to the driving module (12).

7. A high-safety ball valve capable of automatically releasing pressure according to claim 6, characterized in that: The buffer assembly (11) comprises a rotating rod (113), a driven gear (114), a pull rod (115), a buffer plate (116), and a fixed seat (117); the rotating rod (113) passes through a portion of the driving module (12) and is threadedly connected to a portion of the driving module (12); the rotating rod (113) passes through the driven gear (114) and the top end of the fixed seat (117) in sequence and is rotatably connected to the pull rod (115); the rotating rod (113) and the driven gear (114) are threadedly connected; the driven gear (114) and the output portion of the driving module (12) are meshed; the driven gear (114) and the top end of the fixed seat (117) are rotatably connected; the fixed seat (117) and the inlet connector (1) are fixedly connected; the pull rod (115) is inserted into the inlet connector (1) and is hinged to one end of the buffer plate (116); and the other end of the buffer plate (116) is hinged to the inner wall surface of the inlet connector (1).

8. A high-safety ball valve capable of automatically releasing pressure according to claim 7, characterized in that: The drive module (12) comprises a drive motor (121), a fixing plate (122) and a transmission gear (123); the output shaft of the drive motor (121) is fixedly connected to the valve stem (13); the fixing plate (122) is welded to the drive motor (121); the fixing plate (122) and the rotating rod (113) are threadedly connected; the transmission gear (123) and the output shaft of the drive motor (121) are welded; the transmission gear (123) and the driven gear (114) are meshed; and the drive motor (121) and the drive switch (104) are electrically connected.

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