Low-temperature elastic track ball valve with high sealing performance

Abstract

The application belongs to the field of valves, and particularly relates to a high-sealing low-temperature elastic track ball valve. In view of the problem that the sealing performance between a valve clapper and related components is reduced due to thermal expansion and cold contraction of materials under high-temperature or low-temperature environment, the valve is affected, and the limiting structure of the valve is not flexible enough, the following scheme is provided, which comprises a valve body, a cavity is formed in the valve body, a lower mounting plate is integrally formed at the top of the valve body, an upper mounting plate is fixedly connected to the top of the lower mounting plate through a connecting assembly, a strip-shaped plate is integrally formed at the top of the upper mounting plate, support seats are integrally formed at the top of the upper mounting plate on both sides, in the application, the first sealing assembly and the second sealing assembly are arranged, the push ring, the conical block and the conical groove in the first sealing assembly are matched, and the plurality of first sealing gaskets, the packing and the pressing block pressing structure in the second sealing assembly, so that the sealing performance of the valve is effectively improved, and the risk of medium leakage is reduced.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and in particular to a high-sealing, low-temperature elastic ball valve. Background Technology

[0002] In the industrial sector, valves are crucial devices for controlling the flow of fluid media, and their performance is of paramount importance. Existing ball valves present numerous problems in practical applications:

[0003] On the one hand, under high or low temperature environments, the thermal expansion and contraction of materials can lead to a decrease in the sealing performance between the valve disc and related components, affecting the sealing effect of the valve, which may result in media leakage, causing resource waste and safety hazards.

[0004] On the other hand, the valve's limiting structure is not flexible enough and the operation is cumbersome. When it is necessary to open or close the valve, the operation process is relatively complicated, which increases the labor intensity of the staff.

[0005] In addition, the valve's poor insulation performance means that the valve body temperature is easily affected by the external environment during the flow of the medium, which affects the normal flow of the medium and the service life of the valve body.

[0006] Furthermore, the replacement of the internal packing of the valve is inconvenient. When the packing is damaged or aged, it is difficult to replace it quickly and easily, which affects the normal operation of the valve. Summary of the Invention

[0007] The purpose of this invention is to address the shortcomings of existing ball valves. In high- or low-temperature environments, the thermal expansion and contraction of materials can lead to a decrease in the sealing performance between the valve disc and related components, affecting the valve's sealing effect, potentially causing media leakage, resource waste, and safety hazards. Furthermore, the valve's limiting structure is not flexible enough, and operation is cumbersome. Opening or closing the valve is complex, increasing the workload of operators. In addition, the valve's insulation performance is poor; during media flow, the valve body temperature is easily affected by the external environment, impacting normal media flow and the valve's service life. Moreover, replacing the internal packing is inconvenient; when the packing is damaged or aged, it is difficult to replace quickly and easily, affecting the normal operation of the valve. Therefore, this invention proposes a high-sealing, low-temperature elastic ball valve.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A high-sealing, low-temperature elastic ball valve includes a valve body with an internal cavity. A lower mounting plate is integrally formed on the top of the valve body. An upper mounting plate is fixedly connected to the top of the lower mounting plate via a connecting assembly. A strip plate is integrally formed on the top of the upper mounting plate. Support seats are integrally formed on both sides of the top of the upper mounting plate. A valve stem rotatably passes through the interior of each support seat. A receiving cavity is formed on the top of the lower mounting plate. A circular hole is formed inside the strip plate. The bottom of the valve stem passes through the circular hole and extends into the receiving cavity, where a valve core is fixedly connected. The valve core is located inside the cavity and is used to control the opening and closing of the valve body. An operating disc is fixedly sleeved on the top of the valve stem. A first fixing nut is threaded onto the outer wall of the valve stem to fix the operating disc. A limiting assembly for limiting the movement of the operating disc is provided on the outer wall of the support seat.

[0010] The inner wall of the cavity is provided with a longitudinal annular groove, and a first sealing component for improving the sealing performance of the valve is provided inside the longitudinal annular groove.

[0011] The outer wall of the valve body is fixedly covered with a heat insulation cover, and the inside of the heat insulation cover is provided with a heat insulation component for heat preservation of the valve body.

[0012] The cavity is equipped with a second sealing component to improve the valve's sealing performance.

[0013] In one possible design, the connecting assembly includes a plurality of first fixing screws threaded through the interior of the lower mounting plate and the upper mounting plate, the outer wall of the first fixing screws being threaded with a second fixing nut, a pressure plate being provided on the top of the strip plate, and two symmetrically arranged second fixing screws being threaded through the interior of the pressure plate, the second fixing screws being threadedly connected to the strip plate for connecting the pressure plate and the strip plate.

[0014] In one possible design, the limiting assembly includes a limiting sleeve that is slidably fitted onto the outer wall of the support base. An inner ring is fixedly connected to the bottom of the limiting sleeve. A first rotating ring is rotatably fitted onto the outer wall of the inner ring. Multiple limiting notches are provided at the top of the limiting sleeve to limit the operation panel. Multiple rectangular cavities are provided inside the limiting sleeve. A horizontal hole is provided on one side of the inner wall of each limiting notch, communicating with the rectangular cavity. Multiple vertical rods are fixedly connected to the top of the first rotating ring. The vertical rods are slidably connected inside the rectangular cavity. An annular block is fixedly connected to the top of each vertical rod. One end of the annular block passes through the horizontal hole and is used to limit the top of the operation panel.

[0015] In one possible design, a fixed circular plate is fixedly connected to the inner wall of the inner ring. A second clearance hole is formed inside the fixed circular plate, which cooperates with the support base. A second circular groove is formed on the top of the pressure plate. A side annular groove is formed on the inner wall of the second circular groove. Two first clearance holes are symmetrically arranged on the top of the pressure plate. The first clearance holes are located on both sides of the second circular groove and are connected to the side annular groove. A second rotating ring is placed inside the second circular groove. Limiting blocks are fixedly connected to both sides of the second rotating ring. The limiting blocks are slidably connected inside the side annular groove and cooperate with the first clearance holes. Sliding rods are rotatably connected to both sides of the second rotating ring. Sliding grooves are formed on the inner walls of both sides of the support base. The sliding rods are slidably connected inside the sliding grooves. A second tension spring is fixedly connected between the top of the second rotating ring and the bottom of the fixed circular plate.

[0016] In one possible design, the first sealing assembly includes a push ring slidably connected to the inner wall of a longitudinal annular groove, a fixed ring fixedly connected to the inner wall of the cavity, a tapered groove formed on one side of the fixed ring, a cross connecting rod fixedly connected to the inner wall of the push ring, a tapered block fixedly connected to one end of the cross connecting rod, the tapered block cooperating with the tapered groove and used to seal the tapered block, and a push rod fixedly connected to one side of the cross connecting rod, the push rod abutting against the valve core.

[0017] In one possible design, a plurality of interconnected first circular grooves are formed on one inner wall of the longitudinal annular groove. A fixed rod slides through the interior of the first circular groove. One end of the fixed rod is fixedly connected to one side of the push ring. A first tension spring is fixedly connected between one end of the fixed rod and one inner wall of the first circular groove. A protrusion is fixedly connected to one side of the push ring.

[0018] In one possible design, the insulation component includes a rectangular hole on one side of the insulation cover, with a transparent window fixedly embedded in the inner wall of the rectangular hole. A second connecting hole is provided on the top side of the insulation cover, and a first connecting hole is provided on the bottom inner wall of the insulation cover. An upper notch is provided on the bottom of the outer wall of the valve body, which communicates with the second connecting hole. A lower notch is provided on the bottom of the valve body, which communicates with the first connecting hole. A push ring is used to block the lower notch, and a protrusion is used to block the upper notch. The lower and upper notches are offset.

[0019] In one possible design, the second sealing assembly includes a plurality of first sealing gaskets located inside the receiving cavity, the plurality of first sealing gaskets being slidably fitted onto the outer wall of the valve stem, and a filler being disposed between the plurality of first sealing gaskets. A pressure block is integrally formed at the bottom of the strip plate for pressing the first sealing gaskets. A second sealing gasket is fixedly fitted onto the outer wall of the valve stem, and the second sealing gasket abuts against the top of the valve core and the inner wall of the receiving cavity.

[0020] In one possible design, a transverse annular groove is formed on the bottom inner wall of the cavity, and a sealing ring is fixedly embedded inside the transverse annular groove. An elastic track body is fixedly connected to the bottom of the valve core, and the elastic track body is rotatably connected inside the transverse annular groove.

[0021] In one possible design, both ends of the valve body are integrally formed with connecting flanges.

[0022] In this application, when it is necessary to open the valve, the first rotating ring is rotated, which drives multiple vertical rods to rotate. The vertical rods rotate inside the rectangular cavity and drive the annular block to rotate. One end of the annular block retracts from the inside of the limiting notch to the inside of the horizontal hole, thereby releasing the pressing state on the operating panel. At this time, the limiting sleeve can be moved down, and the limiting sleeve drives the fixed circular plate to move down. The fixed circular plate moves down under the tension of the second tension spring, thereby releasing the locking state on the operating panel.

[0023] At this time, the operating panel can be rotated normally. The operating panel drives the valve stem to rotate, and the valve stem drives the valve core to rotate, thereby adjusting the valve from the closed state to the open state. At the same time, the valve core drives the elastic track body to rotate inside the transverse annular groove. The elastic track design features an elastic or arc-shaped guide rail structure in the ball support or valve seat support area to adapt to the thermal expansion and contraction of materials under high or low temperature conditions, and to maintain a tight fit between the valve core and the insulation cover.

[0024] At the same time, while the valve core is rotating, the push rod can be stopped. At this time, the fixed rod moves laterally under the tension of the first tension spring. The fixed rod drives the push ring to move laterally, and the push ring drives the conical block to move laterally. As a result, the conical block is no longer locked with the conical groove, and the normal flow of the internal medium can be completed.

[0025] Multiple first sealing gaskets are installed inside the receiving cavity to improve the sealing performance of the device, and filler is installed inside the upper mounting plate and pressed by pressure blocks. When it is necessary to remove the pressure plate, the pressure plate cannot move upward because the slide rod is slidably connected inside the slide groove.

[0026] At this time, the second rotating ring can be rotated, which drives the limiting block to rotate. The limiting block rotates inside the second fixing screw. When the limiting block moves to one side of the first clearance hole, the slide rod and the second rotating ring can be moved upward, thereby allowing the second rotating ring to move out of the inside of the second circular groove, releasing the limiting of the pressure plate. The second fixing screw can then be rotated to remove the pressure plate and replace the packing.

[0027] When the medium is flowing normally, it enters the interior of the insulation cover sequentially through the upper and lower notches, as well as the second and first connecting holes. The medium fills the interior of the insulation cover. When the valve core is closed, the push ring first blocks the lower notch and then blocks the upper notch, thus leaving some medium inside the insulation cover to achieve the insulation effect. When the valve is opened again, the slightly heated medium will first enter the interior of the lower mounting plate through the first connecting hole and the lower notch, slowly reducing the temperature of the lower mounting plate before a large amount of medium passes through. This avoids excessive temperature difference and extends the service life of the device.

[0028] Beneficial effects: By setting up a first sealing assembly and a second sealing assembly, the push ring, conical block and conical groove in the first sealing assembly cooperate with each other, and multiple first sealing gaskets, packing and pressure block clamping structures in the second sealing assembly effectively improve the sealing performance of the valve, reduce the risk of media leakage, and ensure the safety and stability of media flow.

[0029] The design of elastic or arc-shaped guide rail structures (with the elastic rail body rotating within a transverse annular groove) in the ball support or valve seat support area can adapt to the thermal expansion and contraction of materials under high or low temperature conditions, maintain the tight fit between the valve disc and the insulation cover, and further enhance the sealing performance and stability of the valve.

[0030] The design of the limit assembly makes valve operation more flexible and convenient. By rotating the first and second rotating rings, the pressure on the control panel and the limit position can be easily released, enabling normal opening and closing of the valve and reducing the workload of operators.

[0031] The insulation component is designed so that the medium can fill the inside of the insulation cover during normal flow. When the valve is closed, the push ring first blocks the lower notch and then the upper notch, leaving some medium inside the insulation cover to achieve the insulation effect. When the valve is opened again, the slightly warmed medium will first enter the lower mounting plate through the first connecting hole and the lower notch, slowly lowering the temperature of the lower mounting plate before a large amount of medium flows through, avoiding excessive temperature differences and extending the lifespan of the device.

[0032] The design of the connecting components and pressure plate makes packing replacement more convenient and quick. When packing needs to be replaced, simply rotate the second rotating ring to release the pressure plate's limit, and then rotate the second fixing screw to remove the pressure plate and replace the packing, thus improving valve maintenance efficiency.

[0033] The valve body is equipped with connecting flanges at both ends for easy connection to pipelines. The entire ball valve has a reasonable structural design and the components fit together tightly, which improves the overall performance and reliability of the valve. Attached Figure Description

[0034] Figure 1 This is a three-dimensional structural schematic diagram of a high-sealing, low-temperature elastic ball valve proposed in this invention.

[0035] Figure 2 This is a three-dimensional structural schematic diagram from a second perspective of a high-sealing, low-temperature elastic ball valve proposed in this invention.

[0036] Figure 3 An exploded view of a high-sealing, low-temperature elastic ball valve proposed in this invention;

[0037] Figure 4 This is a three-dimensional cross-sectional view of the valve body and insulation cover in a high-sealing, low-temperature elastic ball valve proposed in this invention.

[0038] Figure 5 This is a three-dimensional cross-sectional view of the valve body in a high-sealing, low-temperature elastic ball valve proposed in this invention.

[0039] Figure 6 This is a three-dimensional cross-sectional view of the insulation cover in a high-sealing low-temperature elastic ball valve proposed in this invention.

[0040] Figure 7 This is a three-dimensional structural diagram of the fixed ring and the push ring in a high-sealing low-temperature elastic ball valve proposed in this invention;

[0041] Figure 8 This is an exploded view of the upper mounting plate and the first sealing gasket in a high-sealing, low-temperature elastic ball valve proposed in this invention.

[0042] Figure 9 This is a three-dimensional structural diagram of the pressure plate and operating panel in a high-sealing, low-temperature elastic ball valve proposed in this invention.

[0043] Figure 10 This is an exploded view of the pressure plate and rotating ring in a high-sealing, low-temperature elastic ball valve proposed in this invention.

[0044] Figure 11 Exploded view of the limiting sleeve and operating panel in a high-sealing low-temperature elastic ball valve proposed in this invention;

[0045] Figure 12 This is an exploded view of the limiting sleeve and the first rotating ring in a high-sealing, low-temperature elastic ball valve proposed in this invention.

[0046] In the diagram: 1. Insulation cover; 2. Transparent window; 3. Connecting flange; 4. Upper mounting plate; 5. Pressure plate; 6. Limiting sleeve; 7. Operating panel; 8. Support base; 9. Lower mounting plate; 10. First fixing nut; 11. Valve stem; 12. First sealing gasket; 13. Second fixing nut; 14. First fixing screw; 15. Strip plate; 16. Cavity; 17. Valve core; 18. Push ring; 19. Second sealing gasket; 20. Receiving cavity; 21. Valve body; 22. Elastic track body; 23. Transverse annular groove; 24. Sealing ring; 25. First circular groove; 26. Longitudinal annular groove; 27. Lower notch; 28. Upper notch; 29. ​​Rectangular hole; 30. First 31. Connecting hole; 32. Second connecting hole; 33. Fixing ring; 34. Conical groove; 35. Conical block; 36. Fixing rod; 37. First tension spring; 38. Push rod; 39. Cross connecting rod; 40. Protrusion; 41. Sliding groove; 42. Round hole; 43. Second fixing screw; 44. Pressure block; 45. Second tension spring; 46. Fixing round plate; 47. Inner ring; 48. First rotating ring; 49. First clearance hole; 50. Limiting block; 51. Sliding rod; 52. Second rotating ring; 53. Side annular groove; 54. Second round groove; 55. Annular block; 56. Limiting notch; 57. Second clearance hole; 58. Vertical rod; 59. Horizontal hole; 50. Rectangular cavity. Detailed Implementation

[0047] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0048] Example 1

[0049] Reference Figure 1-12A ball valve includes: a valve body 21, with a cavity 16 inside the valve body 21; a lower mounting plate 9 integrally formed on the top of the valve body 21; an upper mounting plate 4 fixedly connected to the top of the lower mounting plate 9 via a connecting assembly; the connecting assembly includes multiple first fixing screws 14 threaded through the interior of the lower mounting plate 9 and the upper mounting plate 4; second fixing nuts 13 threaded onto the outer wall of the first fixing screws 14; a pressure plate 5 disposed on the top of a strip plate 15; two symmetrically arranged second fixing screws 42 threaded through the interior of the pressure plate 5; the second fixing screws 42 threadedly connected to the strip plate 15 for connecting the pressure plate 5 and the strip plate 15; a strip plate 15 integrally formed on the top of the upper mounting plate 4; and support seats integrally formed on both sides of the top of the upper mounting plate 4. 8. A valve stem 11 is rotatably inserted through the interior of the support base 8. A receiving cavity 20 is opened at the top of the lower mounting plate 9. A circular hole 41 is opened inside the strip plate 15. The bottom of the valve stem 11 passes through the circular hole 41 and extends into the interior of the receiving cavity 20, where a valve core 17 is fixedly connected. The valve core 17 is located inside the cavity 16 and is used to control the opening and closing of the valve body 21. An operating disc 7 is fixedly sleeved on the top of the valve stem 11. A first fixing nut 10 is threaded onto the outer wall of the valve stem 11 to fix the operating disc 7. A limiting component for limiting the operation disc 7 is provided on the outer wall of the support base 8. The limiting component includes a limiting sleeve 6 that slides on the outer wall of the support base 8. An inner ring 46 is fixedly connected to the bottom of the limiting sleeve 6. The outer wall is fitted with a first rotating ring 47. The top of the limiting sleeve 6 has multiple limiting notches 55, which limit the operation panel 7. The limiting sleeve 6 has multiple rectangular cavities 59 inside. A horizontal hole 58 is formed on one inner wall of each limiting notch 55, communicating with the rectangular cavity 59. Multiple vertical rods 57 are fixedly connected to the top of the first rotating ring 47, and these rods slidably connect to the inside of the rectangular cavity 59. An annular block 54 is fixedly connected to the top of each vertical rod 57, with one end of the annular block 54 passing through the horizontal hole 58 and limiting the top of the operation panel 7. When the valve needs to be opened, the first rotating ring 47 is rotated, causing the multiple vertical rods 57 to rotate. The vertical rods 57 rotate inside the rectangular cavity 59. Rod 57 drives the annular block 54 to rotate. One end of the annular block 54 retracts from the inside of the limiting notch 55 to the inside of the transverse hole 58, thereby releasing the pressing state on the operating disc 7. At this time, the limiting sleeve 6 can be moved down, and the limiting sleeve 6 drives the fixed circular plate 45 to move down. The fixed circular plate 45 moves down under the tension of the second tension spring 44, thereby releasing the locking state on the operating disc 7. The inner wall of the inner ring 46 is fixedly connected to the fixed circular plate 45. The inside of the fixed circular plate 45 is provided with a second clearance hole 56. The second clearance hole 56 is used in conjunction with the support base 8. The top of the pressure plate 5 is provided with a second circular groove 53. The inner wall of the second circular groove 53 is provided with a connected side annular groove 52. The top of the pressure plate 5 is provided with two symmetrically arranged first clearance holes 48.The first clearance hole 48 is located on both sides of the second circular groove 53 and communicates with the side annular groove 52. A second rotating ring 51 is placed inside the second circular groove 53. Limiting blocks 49 are fixedly connected to both sides of the second rotating ring 51. The limiting blocks 49 are slidably connected inside the side annular groove 52 and cooperate with the first clearance hole 48. Sliding rods 50 are rotatably connected to both sides of the second rotating ring 51. Sliding grooves 40 are opened on the inner walls of both sides of the support base 8. The sliding rods 50 are slidably connected inside the sliding grooves 40. A second tension spring 44 is fixedly connected between the top of the second rotating ring 51 and the bottom of the fixed circular plate 45. Multiple first sealing gaskets 12 are provided inside the receiving cavity 20 to improve the sealing performance of the device. Filler is provided inside the upper mounting plate 4 and is pressed tightly by the pressure block 43. When it is necessary to disassemble the pressure plate 5, the pressure plate 5 cannot move upwards because the sliding rods 50 are slidably connected inside the sliding grooves 40.

[0050] The inner wall of cavity 16 has a longitudinal annular groove 26. A first sealing assembly for improving valve sealing performance is disposed inside the longitudinal annular groove 26. The first sealing assembly includes a push ring 18 slidably connected to the inner wall of the longitudinal annular groove 26. A fixing ring 32 is fixedly connected to the inner wall of cavity 16. A conical groove 33 is formed on one side of the fixing ring 32. A cross connecting rod 38 is fixedly connected to the inner wall of the push ring 18. A conical block 34 is fixedly connected to one end of the cross connecting rod 38. The conical block 34 cooperates with the conical groove 33 and is used to seal the conical block 34. A push rod 37 is fixedly connected to one side of the cross connecting rod 38. The push rod 37 abuts against the valve core 17. A first sealing assembly is formed on one side of the inner wall of the longitudinal annular groove 26. There are multiple interconnected first circular grooves 25. A fixed rod 35 slides through the inside of the first circular groove 25. One end of the fixed rod 35 is fixedly connected to one side of the push ring 18. The same first tension spring 36 is fixedly connected between one end of the fixed rod 35 and the inner wall of one side of the first circular groove 25. A protrusion 39 is fixedly connected to one side of the push ring 18. At the same time, when the valve core 17 rotates, the push rod 37 can be stopped. At this time, the fixed rod 35 moves laterally under the tension of the first tension spring 36. The fixed rod 35 drives the push ring 18 to move laterally. The push ring 18 drives the conical block 34 to move laterally. As a result, the conical block 34 is no longer engaged with the conical groove 33, and the normal flow of the internal medium can be completed.

[0051] The outer wall of the valve body 21 is fixedly covered with a heat insulation cover 1. The heat insulation cover 1 contains a heat insulation component for heat preservation of the valve body 21. The heat insulation component includes a rectangular hole 29 on one side of the heat insulation cover 1, with a transparent window 2 fixedly embedded in the inner wall of the rectangular hole 29. A second connecting hole 31 is provided on the top side of the heat insulation cover 1, and a first connecting hole 30 is provided on the bottom inner wall of the heat insulation cover 1. An upper notch 28 is provided at the bottom of the outer wall of the valve body 21, communicating with the second connecting hole 31. A lower notch 27 is provided at the bottom of the valve body 21, communicating with the first connecting hole 30. A push ring 18 is used to seal the lower notch 27, and a protrusion 39 is used to seal the upper notch 28, lower notch 27, and upper notch 29. The 8-positioned design, when the medium is flowing normally, will enter the interior of the insulation cover 1 through the upper notch 28 and lower notch 27, as well as the second connecting hole 31 and the first connecting hole 30 in sequence. The medium will fill the interior of the insulation cover 1. When the valve core 17 is closed, the push ring 18 will first block the lower notch 27 and then block the upper notch 28, so that some medium remains inside the insulation cover 1 to achieve the insulation effect. When it is opened again, the slightly heated medium inside will first enter the interior of the lower mounting plate 9 through the lower first connecting hole 30 and lower notch 27, slowly reducing the temperature of the lower mounting plate 9, and then a large amount of medium will pass through. This can avoid excessive temperature difference and extend the service life of the device.

[0052] The cavity 20 is equipped with a second sealing assembly to improve the valve sealing performance. The second sealing assembly includes multiple first sealing gaskets 12 located inside the cavity 20. The multiple first sealing gaskets 12 are slidably sleeved on the outer wall of the valve stem 11. Packing is provided between the multiple first sealing gaskets 12. A pressure block 43 is integrally formed at the bottom of the strip plate 15. The pressure block 43 is used to press the first sealing gaskets 12. A second sealing gasket 19 is fixedly sleeved on the outer wall of the valve stem 11. The second sealing gasket 19 abuts against the top of the valve core 17 and the inner wall of the cavity 20. At this time, the second rotating ring 51 can be rotated. The second rotating ring 51 drives the limiting block 49 to rotate. The limiting block 49 rotates inside the second fixing screw 42. When the limiting block 49 moves to one side of the first clearance hole 48, the slide rod 50 and the second rotating ring 51 can be moved upward, so that the second rotating ring 51 can be moved out of the second circular groove 53, releasing the limiting of the pressure plate 5. The second fixing screw 42 can be rotated to remove the pressure plate 5 and replace the packing.

[0053] This application can be used in the field of valves, or in other fields applicable to this application.

[0054] Example 2

[0055] refer to Figure 1-12Based on Example 1, an improvement is made to a high-sealing, low-temperature elastic track ball valve, which is applied in the valve field. The bottom inner wall of the cavity 16 is provided with a transverse annular groove 23, and a sealing ring 24 is fixedly embedded inside the transverse annular groove 23. The bottom of the valve core 17 is fixedly connected to an elastic track body 22, which is rotatably connected inside the transverse annular groove 23. Both ends of the valve body 21 are integrally formed with connecting flanges 3. At this time, the operating disc 7 can be rotated normally. The operating disc 7 drives the valve stem 11 to rotate, and the valve stem 11 drives the valve core 17 to rotate, thereby adjusting the valve from the closed state to the open state. At the same time, the valve core 17 drives the elastic track body 22 to rotate inside the transverse annular groove 23. The elastic track design is as follows: an elastic or arc-shaped guide rail structure is designed in the ball support or valve seat support area to adapt to the thermal expansion and contraction of materials under high or low temperature conditions, and to maintain the tight fit between the valve core 17 and the heat insulation cover 1.

[0056] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0057] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-sealing, low-temperature elastic ball valve, characterized in that, include: The valve body (21) has a cavity (16) inside. A lower mounting plate (9) is integrally formed on the top of the valve body (21). An upper mounting plate (4) is fixedly connected to the top of the lower mounting plate (9) through a connecting assembly. A strip plate (15) is integrally formed on the top of the upper mounting plate (4). Support seats (8) are integrally formed on both sides of the top of the upper mounting plate (4). A valve stem (11) rotatably passes through the inside of the support seat (8). A receiving cavity (20) is formed on the top of the lower mounting plate (9). A cavity (20) is formed inside the strip plate (15). A circular hole (41) is provided. The bottom of the valve stem (11) passes through the circular hole (41) and extends into the cavity (20) and is fixedly connected to the valve core (17). The valve core (17) is located inside the cavity (16) and is used to control the opening and closing of the valve body (21). The top of the valve stem (11) is fixedly fitted with an operating disc (7). The outer wall of the valve stem (11) is threaded with a first fixing nut (10). The first fixing nut (10) is used to fix the operating disc (7). The outer wall of the support base (8) is provided with a limiting component for limiting the operation disc (7). The inner wall of the cavity (16) is provided with a longitudinal annular groove (26). The interior of the longitudinal annular groove (26) is provided with a first sealing component for improving the sealing performance of the valve. The first sealing component includes a push ring (18) slidably connected to the inner wall of the longitudinal annular groove (26). A fixing ring (32) is fixedly connected to the inner wall of the cavity (16). A conical groove (33) is provided on one side of the fixing ring (32). A cross connecting rod (38) is fixedly connected to the inner wall of the push ring (18). A conical block (34) is fixedly connected to one end of the cross connecting rod (38). The conical block (34) is used in conjunction with the conical groove (33). And used to block the conical block (34), a push rod (37) is fixedly connected to one side of the cross connecting rod (38), the push rod (37) abuts against the valve core (17), a plurality of interconnected first circular grooves (25) are opened on one side of the inner wall of the longitudinal annular groove (26), a fixed rod (35) slides through the inside of the first circular groove (25), one end of the fixed rod (35) is fixedly connected to one side of the push ring (18), and the same first tension spring (36) is fixedly connected between one end of the fixed rod (35) and one side of the inner wall of the first circular groove (25), and a protrusion (39) is fixedly connected to one side of the push ring (18). The outer wall of the valve body (21) is fixedly covered with a heat insulation cover (1). The heat insulation cover (1) is provided with a heat insulation component for heat insulation of the valve body (21). The heat insulation component includes a rectangular hole (29) opened on one side of the heat insulation cover (1). A transparent window (2) is fixedly embedded in the inner wall of the rectangular hole (29). A second connecting hole (31) is opened on the top side of the heat insulation cover (1). A first connecting hole (30) is opened on the bottom inner wall of the heat insulation cover (1). An upper notch (28) is opened at the bottom of the outer wall of the valve body (21). The upper notch (28) is connected to the second connecting hole (31). A lower notch (27) is opened at the bottom of the valve body (21). The lower notch (27) is connected to the first connecting hole (30). The push ring (18) is used to block the lower notch (27). The protrusion (39) is used to block the upper notch (28). The lower notch (27) and the upper notch (28) are misaligned. The cavity (20) is provided with a second sealing component for improving the valve sealing performance.

2. The high-sealing, low-temperature elastic ball valve according to claim 1, characterized in that, The connecting assembly includes a plurality of first fixing screws (14) threaded through the interior of the lower mounting plate (9) and the upper mounting plate (4). The outer wall of the first fixing screws (14) is threaded with a second fixing nut (13). A pressure plate (5) is provided on the top of the strip plate (15). Two symmetrically arranged second fixing screws (42) are threaded through the interior of the pressure plate (5). The second fixing screws (42) are threaded to the strip plate (15) to connect the pressure plate (5) and the strip plate (15).

3. A high-sealing, low-temperature elastic ball valve according to claim 2, characterized in that, The limiting assembly includes a limiting sleeve (6) that is slidably fitted on the outer wall of the support base (8). The bottom of the limiting sleeve (6) is fixedly connected to an inner ring (46). The outer wall of the inner ring (46) is rotatably fitted with a first rotating ring (47). The top of the limiting sleeve (6) is provided with multiple limiting notches (55). The limiting notches (55) are used to limit the operation panel (7). The inside of the limiting sleeve (6) is provided with multiple rectangular cavities (59). The inner wall of one side of the limiting notch (55) is provided with a horizontal hole (58). The horizontal hole (58) is connected to the rectangular cavity (59). The top of the first rotating ring (47) is fixedly connected with multiple vertical rods (57). The vertical rods (57) are slidably connected inside the rectangular cavity (59). The top of the vertical rods (57) is fixedly connected with an annular block (54). One end of the annular block (54) passes through the horizontal hole (58) and is used to limit the top of the operation panel (7).

4. A high-sealing, low-temperature elastic ball valve according to claim 3, characterized in that, The inner wall of the inner ring (46) is fixedly connected to a fixed circular plate (45). The fixed circular plate (45) has a second clearance hole (56) inside. The second clearance hole (56) is used in conjunction with the support base (8). The top of the pressure plate (5) has a second circular groove (53). The inner wall of the second circular groove (53) has a connected side annular groove (52). The top of the pressure plate (5) has two symmetrically arranged first clearance holes (48). The first clearance holes (48) are located on both sides of the second circular groove (53) and are connected to the side annular groove (52). The second circular groove (53) The second rotating ring (51) is placed inside the support base (8). Limiting blocks (49) are fixedly connected to both sides of the second rotating ring (51). The limiting blocks (49) are slidably connected inside the side annular groove (52) and cooperate with the first clearance hole (48). Sliding rods (50) are rotatably connected to both sides of the second rotating ring (51). Sliding grooves (40) are opened on both sides of the inner wall of the support base (8). The sliding rods (50) are slidably connected inside the sliding grooves (40). The same second tension spring (44) is fixedly connected between the top of the second rotating ring (51) and the bottom of the fixed circular plate (45).

5. A high-sealing, low-temperature elastic ball valve according to claim 1, characterized in that, The second sealing assembly includes a plurality of first sealing gaskets (12) located inside the receiving cavity (20). The plurality of first sealing gaskets (12) are slidably sleeved on the outer wall of the valve stem (11). A packing is provided between the plurality of first sealing gaskets (12). A pressure block (43) is integrally formed on the bottom of the strip plate (15). The pressure block (43) is used to press the first sealing gaskets (12). A second sealing gasket (19) is fixedly sleeved on the outer wall of the valve stem (11). The second sealing gasket (19) abuts against the top of the valve core (17) and the inner wall of the receiving cavity (20).

6. A high-sealing, low-temperature elastic ball valve according to claim 1, characterized in that, The bottom inner wall of the cavity (16) is provided with a transverse annular groove (23), and a sealing ring (24) is fixedly embedded inside the transverse annular groove (23). The bottom of the valve core (17) is fixedly connected to an elastic track body (22), and the elastic track body (22) is rotatably connected inside the transverse annular groove (23).

7. A high-sealing, low-temperature elastic ball valve according to claim 1, characterized in that, Both ends of the valve body (21) are integrally formed with connecting flanges (3).

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