High-sealing-performance low-temperature ball valve

Abstract

The invention provides a high-sealing-performance low-temperature ball valve which comprises a main valve body, a side valve body, a valve rod, a sealing assembly, a plugging assembly, a fixing assembly and a limiting assembly. Stable connection of the valve element and the main valve body is achieved through the connecting assembly, and the sealing performance of the valve is remarkably improved through multiple sealing of the movable sealing semi-ring, the fixed sealing semi-ring, the first sealing gasket and the second sealing gasket. The opening degree of the valve is controllable and easy to observe through the design of the limiting assembly, and meanwhile the heat-preservation sleeve and the heat-preservation cover protect the valve rod from being affected by low temperature. The innovative design of the plugging assembly and the fixing assembly simplifies the valve overhauling process, internal overhauling can be conducted without disassembling the whole valve, time is saved, and the maintenance cost is reduced. The low-temperature ball valve solves the problems that a traditional low-temperature ball valve is insufficient in sealing performance, complex in operation and difficult to overhaul, improves operation convenience and overhaul efficiency, and is suitable for a low-temperature fluid control system.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to a low-temperature ball valve with high sealing performance. Background Art

[0002] In cryogenic fluid control systems, ball valves are key components whose sealing performance and ease of operation are crucial.

[0003] Traditional cryogenic ball valves often face problems such as insufficient sealing performance, complex operation and difficult maintenance during use. Especially when the valve opening and closing status needs to be frequently adjusted or maintenance is required, the sealing components and fixing methods of traditional ball valves often limit the flexibility and efficiency of operation. In addition, the flow of media in low-temperature environments places higher requirements on the low-temperature resistance and sealing of the valve.

[0004] Therefore, it is particularly important to develop a cryogenic ball valve with high sealing performance, convenient operation and easy maintenance. Summary of the invention

[0005] The purpose of the present invention is to solve the problems of insufficient sealing performance, complicated operation and difficult maintenance of traditional cryogenic ball valves in the prior art. In particular, when the valve opening and closing state needs to be frequently adjusted or maintenance is required, the sealing components and fixing methods of traditional ball valves often limit the flexibility and efficiency of operation. In addition, the flow of media in a low-temperature environment places higher requirements on the low-temperature resistance and sealing of the valve, and a high-sealing cryogenic ball valve is proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A high-sealing low-temperature ball valve, comprising a main valve body and two side valve bodies, the two side valve bodies are respectively located at the two ends of the main valve body, the outer walls of the main valve body and the side valve body are integrally formed with a plurality of mounting blocks, a same mounting bolt runs through the plurality of mounting blocks located on the same side, a second fixing nut is threadedly sleeved on the outer wall of the mounting bolt, a second gasket is sleeved on the outer wall of the mounting bolt, for mounting the side valve body and the main valve body together;

[0008] A valve stem is rotatably passed through the top of the main valve body, and a valve core is fixedly connected to the bottom of the valve stem through a connecting component. The valve core is used to adjust the opening and closing state of the valve. Second L-shaped grooves are provided on both sides of the top inner wall of the main valve body, and a sealing component for improving the sealing performance of the valve is provided inside the second L-shaped groove;

[0009] The bottom inner wall of the main valve body is provided with a rectangular installation hole, and a plugging component is arranged inside the rectangular installation hole to facilitate the maintenance process;

[0010] A third L-shaped groove is provided on both sides of the inner wall of the bottom of the main valve body, and a fixing component for fixing the plugging component is provided inside the third L-shaped groove to prevent the plugging component from loosening;

[0011] A limit assembly is arranged on the top of the valve stem, and the limit assembly is used to control the opening degree of the valve.

[0012] In one possible design, the connecting assembly includes a connecting rod fixedly connected to the bottom of the valve stem, a connecting groove is provided on the top of the valve core, a connecting block is fixedly connected to the bottom of the connecting rod, the connecting block is fixedly connected to the connecting groove, and two arc-shaped grooves arranged in an annular manner are provided on the outer wall of the connecting rod.

[0013] In a possible design, two symmetrically arranged first vertical grooves are provided on both sides of the top inner wall of the main valve body, the first vertical groove is connected to the second L-shaped groove, a second rectangular block is slidably connected inside the first vertical groove, a first L-shaped block is fixedly connected to the top of the second rectangular block, a movable sealing half ring is fixedly connected to the bottom of the second rectangular block, a fixed sealing half ring is fixedly connected to the bottom inner wall of the main valve body, the fixed sealing half ring is used together with the movable sealing half ring to improve the sealing performance of the device, a round rod is fixedly connected to one side of the movable sealing half ring, and one end of the round rod extends to the inside of the arc groove.

[0014] In one possible design, the sealing assembly includes a first L-shaped plate slidably connected to the inside of a second L-shaped groove, a trapezoidal hole is provided on the top of the first L-shaped plate, the trapezoidal hole is used in conjunction with a first L-shaped block, the first L-shaped block is used to push the first L-shaped plate to move laterally, a first spring is fixedly connected between one end of the first L-shaped plate and an inner wall of one side of the second L-shaped groove, a first sealing gasket is fixedly connected to the bottom of the first L-shaped plate, a second sealing gasket is fixedly connected to the inner wall of the main valve body, and the second sealing gasket is located between the first sealing gasket and the movable sealing half ring.

[0015] In a possible design, the blocking assembly includes a blocking block, which is engaged with the mounting rectangular hole, and the bottom of the blocking block is provided with two symmetrically arranged L-shaped holes, and two symmetrically arranged U-shaped plates are slidably connected between the inner walls on both sides of the L-shaped hole, and the same second spring is fixedly connected between one side of the U-shaped plate and the inner wall of one side of the L-shaped hole, and rectangular grooves are provided on the inner walls on both sides of the mounting rectangular hole, and the rectangular grooves are engaged with the U-shaped plates, and a positioning groove is provided on the top of the U-shaped plate.

[0016] In one possible design, the fixing assembly includes a second L-shaped block slidably connected to the inside of the third L-shaped groove, a slot is provided at the bottom of the second L-shaped block, a second vertical groove connected to the third L-shaped groove is provided on the bottom inner wall of the main valve body, the second vertical groove is in a vertical state, a connected transverse groove is provided on one side inner wall of the second vertical groove, the transverse groove is in a horizontal state and is arranged parallel to the top of the third L-shaped groove, and clearance holes are provided on both sides of the second L-shaped block.

[0017] In a possible design, a same U-shaped block is slidably connected between the inner walls on both sides of the second vertical groove, a fixing screw is passed through the bottom thread of the main valve body, the top of the fixing screw is rotatably connected to the bottom of the U-shaped block, a cross plate is fixedly connected to one side of the U-shaped block, the cross plate is slidably connected to the inside of the cross groove, a positioning block is fixedly connected to the bottom of the cross plate, the bottom of the positioning block extends to the inside of the rectangular groove and engages with the positioning groove, and an insert block is fixedly connected to the bottom inner wall of the U-shaped block, and the insert block is used in conjunction with the slot.

[0018] In a possible design, the limit assembly includes two grooves respectively opened on both sides of the valve stem, the outer wall of the valve stem is clamped with an operating plate, the interior of the operating plate is provided with a strip hole used in conjunction with the groove, the outer wall of the valve stem is sleeved with a first gasket, the outer wall of the valve stem is threadedly sleeved with a first fixing nut, and the outer wall fixing sleeve of the operating plate is provided with an anti-slip sleeve.

[0019] In a possible design, the top of the main valve body is fixedly connected to a thermal insulation sleeve, the thermal insulation sleeve is located outside the valve stem, the interior of the thermal insulation sleeve is fixedly provided with a thermal insulation cover, the thermal insulation cover is sleeved on the outside of the valve stem, the top of the thermal insulation sleeve is fixedly connected to a mounting ring, the mounting ring is located outside the valve stem, the outer wall of the mounting ring is fixedly connected to two first limit rods, the outer wall of the mounting ring is fixedly connected to two first rectangular blocks, one end of the operating panel is fixedly connected to a hook plate, the hook plate is located between the two first limit rods.

[0020] In a possible design, a first latch hole is provided inside the operating panel, a rectangular sleeve is slidingly provided on the outer wall of the operating panel, a connecting plate is fixedly connected to the bottom of the rectangular sleeve, a second latch hole is provided inside the connecting plate, the same latch is inserted into the second latch hole and the first latch hole, second limit rods are fixedly connected to both sides of the bottom of the connecting plate, and the second limit rods are used in conjunction with the first rectangular block.

[0021] In the present application, when it is necessary to control the flow of the medium, the latch can be firstly taken out from the second latch hole and the first latch hole, thereby releasing the braking state of the operating plate and the connecting plate, and the rectangular sleeve is slid upward along the operating plate, at which time the rectangular sleeve drives the connecting plate to move, and the connecting plate drives the second limiting rod to move, and the second limiting rod moves out from both sides of the first rectangular block, thereby releasing the braking state between the mounting ring and the operating plate;

[0022] At this time, the operating plate can be rotated, the operating plate drives the valve stem to rotate, the valve stem drives the connecting rod to rotate, the connecting rod drives the connecting block to rotate, and the connecting block drives the valve core to rotate. At this time, the valve core can be adjusted to a closed state, and at the same time, the hook plate moves between the two first limit rods, thereby ensuring the rotation angle of the valve stem. The degree of opening of the valve can be understood by whether the hook plate conflicts with one side of the two first limit rods;

[0023] When the connecting rod rotates, since one end of the round rod is always inside the arc groove, the arc groove will drive the round rod to move downward when it rotates, and the round rod drives the movable sealing half ring to move downward. At this time, the movable sealing half ring conflicts with the corresponding fixed sealing half ring, thereby improving the sealing performance of the valve core;

[0024] When the movable sealing half ring moves downward, it can also drive the second rectangular block to move downward, and the second rectangular block drives the first L-shaped block to move downward. One side of the first L-shaped block pushes the inclined surface of the trapezoidal hole, thereby driving the first L-shaped plate to move laterally. The first L-shaped plate squeezes the first spring and drives the first sealing gasket to move laterally. The first sealing gasket squeezes the second sealing gasket, and one side of the first sealing gasket contacts the valve core, thereby further improving the sealing performance of the device.

[0025] At this time, the first sealing gasket can also drive the second L-shaped block below to move horizontally. After the second L-shaped block moves, the slot and the plug block correspond to each other. If the valve needs to be repaired at this time, the fixing screw can be turned, and the fixing screw drives the U-shaped block to rise, and the U-shaped block drives the plug block to rise, and the plug block enters the interior of the slot. At the same time, the U-shaped block drives the horizontal plate to move up, and the horizontal plate drives the positioning block to move up;

[0026] At this time, the positioning block moves out from the inside of the positioning groove, and the state of the blocking block can be released. The two U-shaped plates are pressed, and the two U-shaped plates are close to each other. The two U-shaped plates squeeze the second spring. At this time, one end of the U-shaped plate moves out from the inside of the rectangular groove, and the blocking block can be separated from the main valve body. The blocking block can be taken out, and the staff can check the condition of the valve core conveniently.

[0027] Beneficial effects: Through the ingenious design of the connection components and the sealing components, multiple seals are achieved between the valve core and the main valve body. The coordinated use of the mobile sealing half ring and the fixed sealing half ring, as well as the double protection of the first sealing gasket and the second sealing gasket, significantly improve the sealing performance of the valve and ensure that the low-temperature medium does not leak when the valve is closed.

[0028] The design of the limit assembly makes the opening degree of the valve controllable and easy to observe. Through the cooperation of the latch and the rectangular sleeve, the braking state of the operating plate and the connecting plate can be easily released, thereby adjusting the opening and closing state of the valve core. In addition, the setting of the anti-slip sleeve improves the stability and convenience of operation.

[0029] The innovative design of the plugging assembly and the fixing assembly makes the valve maintenance process simple and efficient. Through the cooperation of the fixing screws and the U-shaped block, the block can be easily fixed and released, and the internal maintenance can be carried out without disassembling the entire valve. This not only saves maintenance time, but also reduces maintenance costs.

[0030] The setting of the insulation sleeve and insulation cover effectively protects the valve stem from the influence of low temperature environment and ensures the long-term stable operation of the valve. This is crucial for low-temperature fluid control systems and helps to extend the service life of the valve and improve its reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the three-dimensional structure of a high-sealing cryogenic ball valve proposed by the present invention;

[0032] Figure 2 An exploded view of a heat preservation sleeve and an operating panel in a high-sealing low-temperature ball valve proposed by the present invention;

[0033] Figure 3 This is a three-dimensional structural schematic diagram of an operating plate and a mounting ring in a high-sealing cryogenic ball valve proposed by the present invention;

[0034] Figure 4 This is a three-dimensional structural schematic diagram of the mounting bolts and the main valve body in a high-sealing cryogenic ball valve proposed by the present invention;

[0035] Figure 5 An exploded view of a main valve body and a side valve body in a high-sealing cryogenic ball valve proposed by the present invention;

[0036] Figure 6 This is a schematic diagram of a three-dimensional cross-sectional structure of a main valve body in a high-sealing cryogenic ball valve proposed by the present invention;

[0037] Figure 7 An exploded view of a valve core and a valve stem in a high-sealing cryogenic ball valve proposed by the present invention;

[0038] Figure 8 A schematic diagram of a three-dimensional cross-sectional structure of a main valve body and a first L-shaped plate in a high-sealing cryogenic ball valve proposed by the present invention;

[0039] Fig. 9 An exploded view of a main valve body and a first L-shaped plate of a high-sealing cryogenic ball valve proposed by the present invention;

[0040] Fig.10 This is a three-dimensional cross-sectional structural schematic diagram of a main valve body and a blocking block in a high-sealing cryogenic ball valve proposed by the present invention;

[0041] Fig.11 This is an exploded view of a main valve body and a blocking block in a high-sealing cryogenic ball valve proposed by the present invention;

[0042] Fig.12 This is an exploded view of the main valve body and the second L-shaped plate in a high-sealing cryogenic ball valve proposed by the present invention.

[0043] In the figure: 1, main valve body; 2, side valve body; 3, insulation sleeve; 4, operating panel; 5, insulation cover; 6, valve stem; 7, rectangular sleeve; 8, anti-slip sleeve; 9, first latch hole; 10, strip hole; 11, first fixing nut; 12, first gasket; 13, groove; 14, mounting ring; 15, first limit rod; 16, first rectangular block; 17, second limit rod; 18, second latch hole; 19, connecting plate; 20, second fixing nut; 21, second gasket; 22, mounting block; 23, mounting bolt; 24, first sealing gasket; 25, valve core; 26, movable sealing half ring; 27, second sealing gasket; 28, fixed sealing half ring; 29, round rod; 30. arc groove; 31. connecting rod; 32. connecting block; 33. connecting groove; 34. first L-shaped plate; 35. trapezoidal hole; 36. first L-shaped block; 37. second rectangular block; 38. first spring; 39. first vertical groove; 40. second L-shaped groove; 41. second L-shaped block; 42. fixing screw; 43. U-shaped plate; 44. blocking block; 45. mounting rectangular hole; 46. positioning groove; 47. second spring; 48. L-shaped hole; 49. slot; 50. plug-in block; 51. U-shaped block; 52. positioning block; 53. horizontal plate; 54. third L-shaped groove; 55. rectangular groove; 56. horizontal groove; 57. second vertical groove; 58. clearance hole; 59. hook plate. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0045] Example 1

[0046] Traditional cryogenic ball valves often face problems such as insufficient sealing performance, complex operation and difficult maintenance during use. Especially when the valve opening and closing status needs to be frequently adjusted or maintenance is required, the sealing components and fixing methods of traditional ball valves often limit the flexibility and efficiency of operation. In addition, the flow of media in low-temperature environments places higher requirements on the low-temperature resistance and sealing of the valve.

[0047] Based on this, it is particularly important to develop a cryogenic ball valve with high sealing performance, convenient operation and easy maintenance.

[0048] Reference Figure 1-12 A ball valve comprises a main valve body 1 and two side valve bodies 2, the two side valve bodies 2 are respectively located at the two ends of the main valve body 1, the outer walls of the main valve body 1 and the side valve bodies 2 are integrally formed with a plurality of mounting blocks 22, a same mounting bolt 23 is passed through the plurality of mounting blocks 22 located on the same side, a second fixing nut 20 is threadedly sleeved on the outer wall of the mounting bolt 23, and a second gasket 21 is sleeved on the outer wall of the mounting bolt 23 for mounting the side valve body 2 and the main valve body 1 together;

[0049] The top of the main valve body 1 is rotatably penetrated by a valve stem 6, and the bottom of the valve stem 6 is fixedly connected to a valve core 25 through a connecting assembly. The connecting assembly includes a connecting rod 31 fixedly connected to the bottom of the valve stem 6, and a connecting groove 33 is provided on the top of the valve core 25. A connecting block 32 is fixedly connected to the bottom of the connecting rod 31, and the connecting block 32 is fixedly connected to the connecting groove 33. The outer wall of the connecting rod 31 is provided with two annular arc grooves 30, and two first vertical grooves 39 are symmetrically provided on both sides of the top inner wall of the main valve body 1. The first vertical groove 39 is connected to the second L-shaped groove 40, and the interior of the first vertical groove 39 is slidably connected to a second rectangular block 37, and the top of the second rectangular block 37 is fixedly connected to the first L The bottom of the second rectangular block 37 is fixedly connected with a movable sealing half ring 26, and the bottom inner wall of the main valve body 1 is fixedly connected with a fixed sealing half ring 28. The fixed sealing half ring 28 is used in conjunction with the movable sealing half ring 26 to improve the sealing performance of the device. A round rod 29 is fixedly connected to one side of the movable sealing half ring 26, and one end of the round rod 29 extends to the inside of the arc groove 30. The valve core 25 is used to adjust the opening and closing state of the valve. When the connecting rod 31 rotates, since one end of the round rod 29 is always in the inside of the arc groove 30, the arc groove 30 will drive the round rod 29 to move downward when it rotates, and the round rod 29 drives the movable sealing half ring 26 to move downward. At this time, the movable sealing half ring 26 and the corresponding The fixed sealing half ring 28 conflicts with the fixed sealing half ring 28, thereby improving the sealing performance of the valve core 25. When the movable sealing half ring 26 moves downward, it can also drive the second rectangular block 37 to move downward. The second rectangular block 37 drives the first L-shaped block 36 to move downward. One side of the first L-shaped block 36 pushes the inclined surface of the trapezoidal hole 35, thereby driving the first L-shaped plate 34 to move laterally. The first L-shaped plate 34 squeezes the first spring 38 and drives the first sealing gasket 24 to move laterally. The first sealing gasket 24 squeezes the second sealing gasket 27. One side of the first sealing gasket 24 conflicts with the valve core 25, thereby further improving the sealing performance of the device. Second L-shaped grooves 40 are provided on both sides of the top inner wall of the main valve body 1. The second L-shaped grooves 40 are provided on both sides of the top inner wall of the main valve body 1. 0 is provided with a sealing assembly for improving the sealing performance of the valve, the sealing assembly includes a first L-shaped plate 34 slidably connected to the inside of the second L-shaped groove 40, a trapezoidal hole 35 is provided on the top of the first L-shaped plate 34, the trapezoidal hole 35 is used in conjunction with a first L-shaped block 36, the first L-shaped block 36 is used to push the first L-shaped plate 34 to move laterally, a first spring 38 is fixedly connected between one end of the first L-shaped plate 34 and an inner wall of one side of the second L-shaped groove 40, a first sealing gasket 24 is fixedly connected to the bottom of the first L-shaped plate 34, a second sealing gasket 27 is fixedly connected to the inner wall of the main valve body 1, and the second sealing gasket 27 is located between the first sealing gasket 24 and the movable sealing semi-ring 26;

[0050] The bottom inner wall of the main valve body 1 is provided with a mounting rectangular hole 45, and a plugging component for facilitating the maintenance process is provided inside the mounting rectangular hole 45. The plugging component includes a blocking block 44, which is engaged with the mounting rectangular hole 45. The bottom of the blocking block 44 is provided with two symmetrically arranged L-shaped holes 48, and two symmetrically arranged U-shaped plates 43 are slidably connected between the inner walls on both sides of the L-shaped hole 48. The same second spring 47 is fixedly connected between one side of the U-shaped plate 43 and the inner wall on one side of the L-shaped hole 48. The inner walls on both sides of the mounting rectangular hole 45 are provided with There is a rectangular groove 55, which is engaged with the U-shaped plate 43. A positioning groove 46 is provided on the top of the U-shaped plate 43. At this time, the positioning block 52 is moved out from the inside of the positioning groove 46, and the state of the blocking block 44 can be released. The two U-shaped plates 43 are pressed, and the two U-shaped plates 43 are close to each other. The two U-shaped plates 43 squeeze the second spring 47. At this time, one end of the U-shaped plate 43 is moved out from the inside of the rectangular groove 55, and the blocking block 44 can be separated from the main valve body 1. The blocking block 44 can be taken out, which makes it convenient for the staff to check the condition of the valve core 25;

[0051] Third L-shaped grooves 54 are provided on both sides of the bottom inner wall of the main valve body 1, and a fixing component for fixing the blocking component is arranged inside the third L-shaped groove 54 to prevent the blocking component from loosening. The fixing component includes a second L-shaped block 41 slidably connected to the inside of the third L-shaped groove 54, and a slot 49 is provided at the bottom of the second L-shaped block 41. A second vertical groove 57 connected to the third L-shaped groove 54 is provided on the bottom inner wall of the main valve body 1, and the second vertical groove 57 is in a vertical state. A connected transverse groove 56 is provided on one side inner wall of the second vertical groove 57, and the transverse groove 56 is in a horizontal state and is arranged parallel to the third L-shaped groove 54. A clearance hole 58 is provided on both sides of the second L-shaped block 41, and the same U-shaped block 51 is slidably connected between the inner walls on both sides of the second vertical groove 57. A fixing screw 42 is passed through the bottom thread of the main valve body 1, and the top of the fixing screw 42 is aligned with the U-shaped The bottom of the block 51 is rotatably connected, and a transverse plate 53 is fixedly connected to one side of the U-shaped block 51. The transverse plate 53 is slidably connected to the inside of the transverse groove 56. A positioning block 52 is fixedly connected to the bottom of the transverse plate 53. The bottom of the positioning block 52 extends to the inside of the rectangular groove 55 and engages with the positioning groove 46. An insert block 50 is fixedly connected to the bottom inner wall of the U-shaped block 51. The insert block 50 is used in conjunction with the slot 49. At this time, the first sealing gasket 24 can also drive the second L-shaped block 41 below to move horizontally. After the second L-shaped block 41 moves, the slot 49 corresponds to the insert block 50. If the valve needs to be repaired at this time, the fixing screw 42 can be rotated, and the fixing screw 42 drives the U-shaped block 51 to rise, and the U-shaped block 51 drives the insert block 50 to rise, and the insert block 50 enters the inside of the slot 49. At the same time, the U-shaped block 51 drives the transverse plate 53 to move up, and the transverse plate 53 drives the positioning block 52 to move up;

[0052] A limit assembly is provided at the top of the valve stem 6, and the limit assembly is used to control the opening degree of the valve. The limit assembly includes two grooves 13 respectively opened on both sides of the valve stem 6, the outer wall of the valve stem 6 is clamped with an operating plate 4, and the interior of the operating plate 4 is provided with a strip hole 10 used in conjunction with the groove 13, the outer wall of the valve stem 6 is sleeved with a first gasket 12, the outer wall of the valve stem 6 is threadedly sleeved with a first fixing nut 11, the outer wall of the operating plate 4 is fixedly sleeved with an anti-slip sleeve 8, the top of the main valve body 1 is fixedly connected with a heat preservation sleeve 3, the heat preservation sleeve 3 is located on the outside of the valve stem 6, the heat preservation cover 5 is fixedly provided inside the heat preservation sleeve 3, and the heat preservation cover 5 is sleeved on the outside of the valve stem 6, the top of the heat preservation sleeve 3 is fixedly connected with a mounting ring 14, and the mounting ring 14 is located on the valve stem 6, the outer wall of the mounting ring 14 is fixedly connected to two first limit rods 15, the outer wall of the mounting ring 14 is fixedly connected to two first rectangular blocks 16, one end of the operating plate 4 is fixedly connected to a hook plate 59, the hook plate 59 is located between the two first limit rods 15, at this time, the operating plate 4 can be rotated, the operating plate 4 drives the valve stem 6 to rotate, the valve stem 6 drives the connecting rod 31 to rotate, the connecting rod 31 drives the connecting block 32 to rotate, and the connecting block 32 drives the valve core 25 to rotate, at this time, the valve core 25 can be adjusted to a closed state, and at the same time, the hook plate 59 moves between the two first limit rods 15, thereby ensuring the rotation angle of the valve stem 6, and the degree of opening of the valve can be understood by whether the hook plate 59 conflicts with one side of the two first limit rods 15.

[0053] The present application can be used in the valve field, and can also be used in other fields applicable to the present application.

[0054] Example 2

[0055] refer to Figure 1-12 , improved on the basis of Example 1: a high-sealing low-temperature ball valve, which is applied to the field of valves, a first latch hole 9 is opened inside the operating plate 4, a rectangular sleeve 7 is slidably sleeved on the outer wall of the operating plate 4, a connecting plate 19 is fixedly connected to the bottom of the rectangular sleeve 7, a second latch hole 18 is opened inside the connecting plate 19, the second latch hole 18 and the first latch hole 9 are plugged with the same latch, and second limit rods 17 are fixedly connected to both sides of the bottom of the connecting plate 19, and the second limit rod 17 is used in conjunction with the first rectangular block 16. When it is necessary to control the circulation of the medium, the latch can be first taken out from the second latch hole 18 and the first latch hole 9, thereby releasing the braking state of the operating plate 4 and the connecting plate 19, and sliding the rectangular sleeve 7 upward along the operating plate 4, at this time, the rectangular sleeve 7 drives the connecting plate 19 to move, and the connecting plate 19 drives the second limit rod 17 to move, and the second limit rod 17 is moved out from both sides of the first rectangular block 16, thereby releasing the braking state between the mounting ring 14 and the operating plate 4.

[0056] The drawings in the specification of this application are for illustration only, and the sizes and shapes of the components shown therein are not actually limited, but are only for illustration. In the actual implementation process, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0057] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high sealing cryogenic ball valve, characterized in that: include: A main valve body (1) and two side valve bodies (2), wherein the two side valve bodies (2) are respectively located at two ends of the main valve body (1), and the outer walls of the main valve body (1) and the side valve bodies (2) are integrally formed with a plurality of mounting blocks (22), and a same mounting bolt (23) runs through the plurality of mounting blocks (22) located on the same side, and a second fixing nut (20) is threadedly sleeved on the outer wall of the mounting bolt (23), and a second gasket (21) is sleeved on the outer wall of the mounting bolt (23), for mounting the side valve body (2) and the main valve body (1) together; A valve stem (6) is rotatably passed through the top of the main valve body (1), and a valve core (25) is fixedly connected to the bottom of the valve stem (6) via a connecting component. The valve core (25) is used to adjust the opening and closing state of the valve. Second L-shaped grooves (40) are provided on both sides of the inner wall of the top of the main valve body (1), and a sealing component for improving the sealing performance of the valve is provided inside the second L-shaped groove (40); The bottom inner wall of the main valve body (1) is provided with a rectangular installation hole (45), and a plugging component for facilitating the maintenance process is arranged inside the rectangular installation hole (45); A third L-shaped groove (54) is provided on both sides of the inner wall of the bottom of the main valve body (1), and a fixing component for fixing the blocking component is provided inside the third L-shaped groove (54) to prevent the blocking component from loosening; A limit assembly is provided on the top of the valve stem (6), and the limit assembly is used to control the opening degree of the valve.

2. A high sealing cryogenic ball valve according to claim 1, characterized in that: The connecting assembly comprises a connecting rod (31) fixedly connected to the bottom of the valve stem (6); a connecting groove (33) is provided on the top of the valve core (25); a connecting block (32) is fixedly connected to the bottom of the connecting rod (31); the connecting block (32) is fixedly connected to the connecting groove (33); and two arc grooves (30) are provided in an annular arrangement on the outer wall of the connecting rod (31).

3. A high sealing cryogenic ball valve according to claim 2, characterized in that: Two first vertical grooves (39) are symmetrically arranged on both sides of the top inner wall of the main valve body (1), the first vertical groove (39) is connected to the second L-shaped groove (40), the first vertical groove (39) is slidably connected to the inside of the second vertical groove (39), the top of the second rectangular block (37) is fixedly connected to the first L-shaped block (36), the bottom of the second rectangular block (37) is fixedly connected to a movable sealing half ring (26), the bottom inner wall of the main valve body (1) is fixedly connected to a fixed sealing half ring (28), the fixed sealing half ring (28) and the movable sealing half ring (26) are used together to improve the sealing performance of the device, and one side of the movable sealing half ring (26) is fixedly connected to a round rod (29), one end of which extends to the inside of the arc groove (30).

4. A high sealing cryogenic ball valve according to claim 1, characterized in that: The sealing assembly comprises a first L-shaped plate (34) slidably connected inside a second L-shaped groove (40); a trapezoidal hole (35) is provided on the top of the first L-shaped plate (34); the trapezoidal hole (35) is used in conjunction with a first L-shaped block (36); the first L-shaped block (36) is used to push the first L-shaped plate (34) to move laterally; a first spring (38) is fixedly connected between one end of the first L-shaped plate (34) and an inner wall of one side of the second L-shaped groove (40); a first sealing gasket (24) is fixedly connected to the bottom of the first L-shaped plate (34); a second sealing gasket (27) is fixedly connected to the inner wall of the main valve body (1); and the second sealing gasket (27) is located between the first sealing gasket (24) and the movable sealing half ring (26).

5. The high sealing cryogenic ball valve according to claim 1, characterized in that: The blocking assembly comprises a blocking block (44), the blocking block (44) is engaged with a mounting rectangular hole (45), two symmetrically arranged L-shaped holes (48) are provided at the bottom of the blocking block (44), two symmetrically arranged U-shaped plates (43) are slidably connected between the inner walls on both sides of the L-shaped hole (48), a second spring (47) is fixedly connected between one side of the U-shaped plate (43) and the inner wall on one side of the L-shaped hole (48), rectangular grooves (55) are provided on the inner walls on both sides of the mounting rectangular hole (45), the rectangular grooves (55) are engaged with the U-shaped plate (43), and a positioning groove (46) is provided on the top of the U-shaped plate (43).

6. A high sealing cryogenic ball valve according to claim 1, characterized in that: The fixing assembly comprises a second L-shaped block (41) slidably connected inside the third L-shaped groove (54); a slot (49) is provided at the bottom of the second L-shaped block (41); a second vertical groove (57) connected to the third L-shaped groove (54) is provided on the inner wall of the bottom of the main valve body (1); the second vertical groove (57) is in a vertical state; a connected transverse groove (56) is provided on the inner wall of one side of the second vertical groove (57); the transverse groove (56) is in a horizontal state and is arranged parallel to the top of the third L-shaped groove (54); and clearance holes (58) are provided on both sides of the second L-shaped block (41).

7. A high sealing cryogenic ball valve according to claim 6, characterized in that: A U-shaped block (51) is slidably connected between the inner walls on both sides of the second vertical groove (57); a fixing screw (42) is threadedly passed through the bottom of the main valve body (1); the top of the fixing screw (42) is rotatably connected to the bottom of the U-shaped block (51); a transverse plate (53) is fixedly connected to one side of the U-shaped block (51); the transverse plate (53) is slidably connected to the inside of the transverse groove (56); a positioning block (52) is fixedly connected to the bottom of the transverse plate (53); the bottom of the positioning block (52) extends to the inside of the rectangular groove (55) and is engaged with the positioning groove (46); an insert block (50) is fixedly connected to the bottom inner wall of the U-shaped block (51); the insert block (50) is used in conjunction with the slot (49).

8. The high sealing cryogenic ball valve according to claim 1, characterized in that: The limit assembly comprises two grooves (13) respectively provided on both sides of the valve stem (6); the outer wall of the valve stem (6) is clamped with an operating plate (4); the interior of the operating plate (4) is provided with a strip hole (10) for use with the groove (13); the outer wall of the valve stem (6) is sleeved with a first gasket (12); the outer wall of the valve stem (6) is threadedly sleeved with a first fixing nut (11); and the outer wall fixing sleeve of the operating plate (4) is sleeved with an anti-slip sleeve (8).

9. A high sealing cryogenic ball valve according to claim 8, characterized in that: The top of the main valve body (1) is fixedly connected with a heat-insulating sleeve (3), the heat-insulating sleeve (3) is located outside the valve stem (6), the interior of the heat-insulating sleeve (3) is fixedly provided with a heat-insulating cover (5), the heat-insulating cover (5) is sleeved outside the valve stem (6), the top of the heat-insulating sleeve (3) is fixedly connected with a mounting ring (14), the mounting ring (14) is located outside the valve stem (6), the outer wall of the mounting ring (14) is fixedly connected with two first limit rods (15), the outer wall of the mounting ring (14) is fixedly connected with two first rectangular blocks (16), and one end of the operating panel (4) is fixedly connected with a hook plate (59), the hook plate (59) is located between the two first limit rods (15).

10. A high sealing cryogenic ball valve according to claim 9, characterized in that: The operating panel (4) is provided with a first latch hole (9) inside, the outer wall of the operating panel (4) is slidably sleeved with a rectangular sleeve (7), the bottom of the rectangular sleeve (7) is fixedly connected with a connecting plate (19), the inside of the connecting plate (19) is provided with a second latch hole (18), the second latch hole (18) and the first latch hole (9) are plugged with the same latch, and both sides of the bottom of the connecting plate (19) are fixedly connected with second limiting rods (17), and the second limiting rods (17) are used in conjunction with the first rectangular block (16).

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