Low-temperature valve with good connection sealing performance

Abstract

The utility model provides a low-temperature valve with good connection sealing performance, and relates to the technical field of low-temperature valves. The low-temperature valve with the good connection sealing performance comprises an upper sealing seat, a valve body is installed at the bottom of the upper sealing seat, a valve rod is installed in the upper sealing seat, a hand wheel is installed at the top of the valve rod, the outer side of the valve rod is sleeved with a filler pressing plate, and supporting convex frames are fixedly connected to the two sides of the upper sealing seat correspondingly; and a rotating block is rotationally connected into the supporting convex frame, and a bolt is fixedly connected to the top of the rotating block. According to the low-temperature valve with the good connection sealing performance, a rotating disc is rotated through a push rod, the rotating disc pulls pull plates through two connecting blocks, the two pull plates pull two sliding rods to move in the opposite directions through the other two connecting blocks, the two sliding rods slide on two square rods, and two first reset springs are elastically compressed; and the two sliding rods drive the two clamping blocks to be away from the two special nuts correspondingly, so that limiting of the two special nuts is relieved, and by means of the structure, personnel operation is facilitated.

Description

Technical Field

[0001] The utility model relates to a cryogenic valve with good sealing performance, specifically to a cryogenic valve with good connection sealing performance, belonging to the technical field of cryogenic valves. Background Technique

[0002] Cryogenic valves include cryogenic ball valves, cryogenic gate valves, cryogenic globe valves, cryogenic safety valves, cryogenic check valves, cryogenic butterfly valves, cryogenic needle valves, cryogenic throttle valves, cryogenic pressure reducing valves, etc.

[0003] A currently announced cryogenic valve sealing structure with the publication number CN219975596U includes an upper sealing seat, a valve stem, a support convex frame and a packing gland. The valve stem penetrates through the top of the upper sealing seat, and a packing box assembly is installed on the outer wall of the valve stem. The packing box assembly includes a support convex frame, the outer wall of the support convex frame is connected to the outer wall of the upper sealing seat, and a loose joint bolt is installed on the inner wall of the support convex frame through a shaft.

[0004] In the above solution, although there are many benefits, there are also the following disadvantages: Rotate the special nut to the designated position of the loose joint bolt, and the fixed block can be stuck into the fixed hole, thereby enhancing the stability of the special nut and ensuring the sealing performance of the cryogenic valve. However, although this operation method realizes the limit of the special nut, when installing or disassembling two special nuts, personnel need to press the fixed block, which is rather troublesome for personnel to operate and affects the effect of the special nut. Content of the Utility Model

[0005] (1) Technical Problem to be Solved

[0006] The purpose of the present utility model is to provide a cryogenic valve with good connection sealing performance to solve the above problems, that is, to solve the problem that although the limit of the special nut is realized in the prior art, when installing or disassembling two special nuts, personnel need to press the fixed block, which is rather troublesome for personnel to operate and affects the effect of the special nut.

[0007] (2) Technical Solution

[0008] The utility model is realized through the following technical solutions: a cryogenic valve with good connection sealing performance, including an upper sealing seat, a valve body is installed at the bottom of the upper sealing seat, a valve stem is installed inside the upper sealing seat, a handwheel is installed at the top of the valve stem, a packing gland is sleeved outside the valve stem, support convex frames are fixedly connected to both sides of the upper sealing seat, a rotating block is rotatably connected inside the support convex frame, a bolt is fixedly connected to the top of the rotating block, the top end of the bolt extends to the top of the packing gland, a special nut is threadedly connected to the outside of the bolt, a first clamping hole is opened on the outside of the bolt, a second clamping hole is opened on the outside of the special nut, the first clamping hole corresponds to the second clamping hole, a fixed cylinder is fixedly connected to the top of the packing gland, the fixed cylinder is sleeved outside the valve stem, a turntable is rotatably connected to the outside of the fixed cylinder, a push rod is fixedly connected to the outside of the turntable, sliding rods are arranged on both sides of the fixed cylinder, a clamping block is fixedly connected to one side of the bottom of the sliding rod, the clamping block passes through the second clamping hole and extends into the first clamping hole, a pull plate is arranged between the sliding rod and the turntable, connecting blocks are rotatably connected to both ends of the pull plate, the two connecting blocks are respectively fixedly connected to the sliding rod and the turntable, and a sliding assembly is arranged between the sliding rod and the fixed cylinder.

[0009] Preferably, two positioning components are arranged at the bottom of the packing gland, and a packing sleeve is arranged between the two positioning components.

[0010] Preferably, through holes are opened on both sides of the top of the packing gland, and the top ends of the two bolts respectively pass through the two through holes.

[0011] Preferably, the sliding assembly includes a square rod, the square rod is fixedly connected to the outside of the fixed cylinder, a limiting groove is opened inside the sliding rod, one end of the square rod is arranged inside the limiting groove and is slidably connected to the sliding rod, and the limiting groove is opened to facilitate the sliding of the sliding rod on the square rod.

[0012] Preferably, the sliding assembly further includes a first return spring, the first return spring is sleeved outside the square rod, and both ends of the first return spring are respectively fixedly connected to the sliding rod and the fixed cylinder. The setting of the first return spring plays a role of elastic compression and elastic reset.

[0013] Preferably, a circular pull block is arranged at the top of one of the sliding rods, a plug rod is fixedly connected to the bottom of the circular pull block, the bottom end of the plug rod passes through the top of one of the sliding rods and extends into one of the limiting grooves, the plug rod is slidably connected to one of the sliding rods, a second return spring is sleeved outside the plug rod, and both ends of the second return spring are respectively fixedly connected to one of the sliding rods and the circular pull block.

[0014] Preferably, an arc-shaped groove is formed at the top of one of the square rods, and the insertion rod is arranged inside the arc-shaped groove and is in sliding contact with one of the square rods. A circular groove is formed at the bottom end inside the arc-shaped groove. The arrangement of the insertion rod and the circular groove limits the two clamping blocks after pulling them to a certain position.

[0015] The utility model provides a cryogenic valve with good connection sealing performance, and the beneficial effects thereof are as follows:

[0016] 1. For the cryogenic valve with good connection sealing performance, by rotating the turntable with the push rod, the turntable pulls the pull plate through two of the connecting blocks, and the two pull plates pull the two sliding rods to move in opposite directions through the other two connecting blocks. The two sliding rods slide on the two square rods, and the two first return springs are elastically compressed. The two sliding rods respectively drive the two clamping blocks away from the two special nuts, thereby releasing the limit on the two special nuts. This structure facilitates the operation of personnel.

[0017] 2. For the cryogenic valve with good connection sealing performance, when the two sliding rods move in opposite directions, one of the sliding rods drives the insertion rod to slide in the arc-shaped groove. When the insertion rod slides to the position of the circular groove, the second return spring elastically resets, and the insertion rod is inserted into the circular groove, thereby realizing the limit on the two clamping blocks. This design facilitates the disassembly of the two special nuts by personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 is a schematic diagram of the bolt and special nut structure of the utility model;

[0020] Figure 3 is an enlarged view of the fixed cylinder structure of the utility model;

[0021] Figure 4 is a schematic diagram of the insertion rod structure of the utility model.

[0022]

SYMBOLS OF MAIN COMPONENTS

[0023] 1. Upper sealing seat; 2. Valve body; 3. Valve stem; 4. Handwheel; 5. Support convex frame; 6. Rotating block; 7. Packing pressing plate; 71. Packing sleeve; 8. Positioning component; 9. Bolt; 10. Special nut; 11. Fixed cylinder; 12. Turntable; 13. Push rod; 14. Square rod; 15. Sliding rod; 16. Clamping block; 17. First return spring; 18. Pull plate; 19. Connecting block; 20. Arc-shaped groove; 21. Circular groove; 22. Insertion rod; 23. Second return spring; 91. First card hole; 101. Second card hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] An embodiment of the utility model provides a cryogenic valve with good connection sealing performance.

[0025] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , which includes an upper sealing seat 1. A valve body 2 is installed at the bottom of the upper sealing seat 1. A valve stem 3 is installed inside the upper sealing seat 1. A handwheel 4 is installed at the top of the valve stem 3. A packing gland 7 is sleeved outside the valve stem 3. Two positioning components 8 are arranged at the bottom of the packing gland 7. A packing sleeve 71 is arranged between the two positioning components 8. Support convex frames 5 are fixedly connected to both sides of the upper sealing seat 1. A rotating block 6 is rotatably connected inside the support convex frame 5. A bolt 9 is fixedly connected to the top of the rotating block 6. Through holes are opened on both sides of the top of the packing gland 7. The top ends of the two bolts 9 respectively pass through the two through holes. The top ends of the bolts 9 extend to the top of the packing gland 7. A special nut 10 is threadedly connected to the outside of the bolt 9. A first clamping hole 91 is opened on the outside of the bolt 9. A second clamping hole 101 is opened on the outside of the special nut 10. The first clamping hole 91 corresponds to the second clamping hole 101. A fixing cylinder 11 is fixedly connected to the top of the packing gland 7. The fixing cylinder 11 is sleeved outside the valve stem 3. A turntable 12 is rotatably connected to the outside of the fixing cylinder 11. A push rod 13 is fixedly connected to the outside of the turntable 12. Sliding rods 15 are arranged on both sides of the fixing cylinder 11. A clamping block 16 is fixedly connected to one side of the bottom of the sliding rod 15. The clamping block 16 passes through the second clamping hole 101 and extends into the first clamping hole 91. A pull plate 18 is arranged between the sliding rod 15 and the turntable 12. Both ends of the pull plate 18 are rotatably connected with connecting blocks 19. The two connecting blocks 19 are respectively fixedly connected with the sliding rod 15 and the turntable 12. A sliding assembly is arranged between the sliding rod 15 and the fixing cylinder 11.

[0026] The sliding assembly includes a square rod 14. The square rod 14 is fixedly connected to the outside of the fixing cylinder 11. A limiting groove is opened inside the sliding rod 15. One end of the square rod 14 is arranged inside the limiting groove and is slidably connected with the sliding rod 15. The sliding assembly further includes a first return spring 17. The first return spring 17 is sleeved outside the square rod 14. Both ends of the first return spring 17 are respectively fixedly connected with the sliding rod 15 and the fixing cylinder 11.

[0027] Specifically, when it is necessary to disassemble the special nut 10, the operator rotates the turntable 12 through the push rod 13. The turntable 12 pulls the pull plate 18 through two of the connecting blocks 19. The two pull plates 18 pull the two sliding rods 15 to move in the opposite direction through the other two connecting blocks 19. The two sliding rods 15 slide on the two square rods 14, and the two first return springs 17 are elastically compressed. The two sliding rods 15 respectively drive the two clamping blocks 16 away from the two special nuts 10, so as to release the limit on the two special nuts 10. This structure is convenient for the operator to operate.

[0028] For the technologies of the positioning component 8 and the packing gland 71, the technical solution in a low-temperature valve sealing structure with the publication number CN219975596U is adopted.

[0029] Please refer to Figure 3 and Figure 4 , a circular pulling block is provided at the top of one of the sliding rods 15, a plug rod 22 is fixedly connected to the bottom of the circular pulling block, the bottom end of the plug rod 22 passes through the top of one of the sliding rods 15 and extends into one of the limiting grooves, the plug rod 22 is slidably connected to one of the sliding rods 15, a second return spring 23 is sleeved outside the plug rod 22, and both ends of the second return spring 23 are fixedly connected to one of the sliding rods 15 and the circular pulling block respectively. An arc-shaped groove 20 is formed at the top of one of the square rods 14, the plug rod 22 is arranged inside the arc-shaped groove 20 and is in sliding contact with one of the square rods 14, and a circular groove 21 is formed at the bottom end inside the arc-shaped groove 20.

[0030] Specifically, when the two sliding rods 15 move towards each other, one of the sliding rods 15 drives the plug rod 22 to slide in the arc-shaped groove 20. When the plug rod 22 slides to the position of the circular groove 21, the second return spring 23 elastically resets, and the plug rod 22 is snapped into the circular groove 21, so as to realize the limitation of the two clamping blocks 16. This design facilitates the disassembly of the two special nuts 10 by personnel.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cryogenic valve with good connection sealing performance, comprising an upper sealing seat (1), characterized in that: A valve body (2) is installed at the bottom of the upper sealing seat (1). A valve rod (3) is installed inside the upper sealing seat (1). A handwheel (4) is installed at the top of the valve rod (3). A packing gland (7) is sleeved outside the valve rod (3). Support brackets (5) are fixedly connected to both sides of the upper sealing seat (1). A rotating block (6) is rotatably connected inside the support bracket (5). A bolt (9) is fixedly connected to the top of the rotating block (6). The top end of the bolt (9) extends to the top of the packing gland (7). A special nut (10) is threadedly connected to the outside of the bolt (9). A first card hole (91) is formed in the outside of the bolt (9). A second card hole (101) is formed in the outside of the special nut (10). The first card hole (91) corresponds to the second card hole (101). A fixed cylinder (11) is fixedly connected to the top of the packing gland (7). The fixed cylinder (11) is sleeved outside the valve rod (3). A turntable (12) is rotatably connected to the outside of the fixed cylinder (11). A push rod (13) is fixedly connected to the outside of the turntable (12). Slide bars (15) are arranged on both sides of the fixed cylinder (11). A block (16) is fixedly connected to one side of the bottom of the slide bar (15). The block (16) passes through the second card hole (101) and extends into the first card hole (91). A pull plate (18) is arranged between the slide bar (15) and the turntable (12). Connecting blocks (19) are rotatably connected to both ends of the pull plate (18). The two connecting blocks (19) are respectively fixedly connected to the slide bar (15) and the turntable (12). A sliding assembly is arranged between the slide bar (15) and the fixed cylinder (11).

2. The cryogenic valve with good connection sealing performance according to claim 1, characterized in that: Two positioning assemblies (8) are arranged at the bottom of the packing gland (7). A packing sleeve (71) is arranged between the two positioning assemblies (8).

3. A cryogenic valve with good connection tightness according to claim 1, characterized in that: Through holes are formed in both sides of the top of the packing gland (7). The top ends of the two bolts (9) respectively pass through the two through holes.

4. A cryogenic valve with good connection tightness according to claim 1, characterized in that: The sliding assembly includes a square rod (14). The square rod (14) is fixedly connected to the outside of the fixed cylinder (11). A limiting groove is formed in the inner side of the slide bar (15). One end of the square rod (14) is arranged inside the limiting groove and is slidably connected to the slide bar (15).

5. The cryogenic valve with good connection tightness according to claim 4, characterized in that: The sliding assembly further includes a first return spring (17). The first return spring (17) is sleeved outside the square rod (14). The two ends of the first return spring (17) are respectively fixedly connected to the slide bar (15) and the fixed cylinder (11).

6. The cryogenic valve with good connection sealing performance according to claim 4, characterized in that: A circular pull block is arranged at the top of one of the slide bars (15). A plug rod (22) is fixedly connected to the bottom of the circular pull block. The bottom end of the plug rod (22) passes through the top of one of the slide bars (15) and extends into one of the limiting grooves. The plug rod (22) is slidably connected to one of the slide bars (15). A second return spring (23) is sleeved outside the plug rod (22). The two ends of the second return spring (23) are respectively fixedly connected to one of the slide bars (15) and the circular pull block.

7. The cryogenic valve with good connection sealing performance according to claim 6, wherein: An arc-shaped groove (20) is formed at the top of one of the square rods (14). The insertion rod (22) is arranged inside the arc-shaped groove (20) and is in sliding contact with one of the square rods (14). A circular groove (21) is formed at the bottom end inside the arc-shaped groove (20).

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