Automatic ammonia shut-off valve

Abstract

The utility model discloses an ammonia gas automatic stop valve which comprises a valve body, a flow channel, a valve rod, a valve clack, an installation frame, an actuator, a directional locking component, a locking protrusion, an execution unit and a transverse moving unit. The utility model has the following advantages and effects: after the flow channel is completely cut off by the valve clack, the locking bulge is aligned with the extrusion area and enters the extrusion area, and then the three extrusion blocks are kept fit with the locking bulge, so that the purpose of locking the locking bulge is achieved, and the valve rod can be further prevented from being slightly deviated in the vertical direction, so that the valve rod is prevented from being damaged. A small gap is formed in the sealing surface between the valve clack and the valve seat to cause leakage, so that the stability and the safety are improved; and meanwhile, misoperation of an operator on the actuator can be prevented, and the operation is more reliable.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to an automatic ammonia shut-off valve. Background Technology

[0002] Ammonia, as an important chemical raw material, is widely used in industries such as refrigeration, fertilizer, and pharmaceuticals. Due to its strong irritant and toxic properties, strict safety controls must be implemented during its transportation and storage. Therefore, ammonia pipeline systems are often equipped with shut-off valves to quickly close the pipeline in abnormal operating conditions, preventing ammonia leakage and ensuring the safety of personnel and equipment.

[0003] While existing ammonia shut-off valves structurally achieve basic opening and closing functions, certain safety hazards still exist during actual use. In particular, when subjected to external mechanical impacts or vibrations, the valve stem inside the shut-off valve may experience a slight vertical shift. Although this shift is difficult to detect, it can cause a small gap between the valve disc and the valve seat, preventing the flow channel from completely closing and ultimately leading to a slow leakage of ammonia. Long-term accumulation not only pollutes the environment but also poses serious safety hazards such as explosions and poisoning.

[0004] Therefore, there is an urgent need for an automatic ammonia shut-off valve with a more stable structure that can maintain a tight seal even under external impact, in order to improve the overall safety performance of the system. Utility Model Content

[0005] The purpose of this invention is to provide an automatic ammonia shut-off valve to solve the problems mentioned in the background art.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] An automatic ammonia shut-off valve includes a valve body with a flow channel inside the valve body, a valve stem that can move vertically inside the valve body, and a valve disc that can cut off the flow channel fixedly at the lower end of the valve stem; a mounting bracket is fixedly installed at the upper end of the valve body, the valve stem extends upward into the mounting bracket, and an actuator that provides a driving force for vertical movement of the valve stem is fixedly installed at the upper end of the mounting bracket.

[0008] The mounting bracket is equipped with a directional locking component, and a locking protrusion is fixedly provided on the left side of the valve stem. After the valve disc completely cuts off the flow channel, the locking protrusion aligns with the directional locking component, and the directional locking component locks the locking protrusion in place, so that the valve stem will not deviate.

[0009] The directional locking component includes an execution unit that cooperates with the locking protrusion to lock it in place;

[0010] The directional locking component also includes a lateral movement unit that drives the actuator to move closer to or further away from the valve stem.

[0011] A further configuration is that the execution unit includes an execution disk, and the execution disk has three regularly opened side grooves. Each side groove is provided with a fixed base, and each fixed base is fixed with a pressing block by bolts. A pressing area is formed between the three pressing blocks for the locking protrusion to enter, and after the locking protrusion enters the pressing area, the inner side of each pressing block is in contact with the locking protrusion.

[0012] A further feature is that the cross-sectional shape of the locking protrusion is circular, and the inner side of each of the extrusion blocks has an arc-shaped surface adapted to the outer peripheral wall of the locking protrusion and a bearing section that contacts the end of the locking protrusion.

[0013] A further configuration is that the execution disk has three regular arc-shaped blocks inside, and a side groove is formed between adjacent arc-shaped blocks. An inner groove is formed in the middle of the three arc-shaped blocks, and an inner filling block is provided in the inner groove. The inner filling block has three T-shaped grooves regularly opened on its side. Each fixed base has a T-shaped block fixedly installed in the corresponding T-shaped groove on its inner side.

[0014] The execution disk is covered with a cover plate by screws, and the cover plate presses on the inner filling block to fix the inner filling block.

[0015] A further configuration is that the transverse unit includes a side fixing panel fixed to the inner wall of the left side of the mounting frame, a side fixing seat fixed to the right side of the side fixing panel, a movable inner cavity opened in the side fixing seat, a movable inner shaft movably disposed in the movable inner cavity, the right side of the movable inner shaft extending out of the movable inner cavity and fixed to the execution plate, and the execution plate is driven to move closer to or away from the valve stem by controlling the movable inner shaft;

[0016] The right side of the side fixing seat is fixedly provided with a cap that can contact the movable inner shaft to prevent it from completely disengaging from the movable inner cavity.

[0017] A further feature is that the movable inner shaft has a hollow area, within which a spring is disposed. The side fixing panel has an extension section that extends into the hollow area. The extension section contacts the spring and provides support, allowing the spring to remain in a compressed state that provides a rightward moving force to the movable inner shaft.

[0018] A further feature is that the side fixing panel and the mounting bracket are fitted with an inner hole for the moving inner shaft to pass through, the left end of the moving inner shaft protrudes from the inner hole to the outside, and a connecting section is fixedly provided at the left end of the moving inner shaft.

[0019] This utility model has the following beneficial effects:

[0020] 1. After the valve disc completely cuts off the flow channel, the locking protrusion aligns with the compression zone and enters the compression zone. Then, the three compression blocks will keep in contact with the locking protrusion to achieve the purpose of locking the protrusion. This can prevent the valve stem from slight vertical displacement, which could cause a small gap between the valve disc and the valve seat and lead to leakage, thus improving stability and safety. At the same time, it can also prevent operators from misoperating the actuator, making it more reliable.

[0021] 2. The cover plate not only secures the inner filling block, but also facilitates disassembly. The structure can be disassembled by opening the cover plate. When the extrusion block is worn and can no longer fit with the locking protrusion, the cover plate can be removed to replace the extrusion block.

[0022] 3. The left end of the moving inner shaft can extend from the inner hole to the outside, so that the operator can control the lateral movement of the moving inner shaft, so that the actuator can move away from the valve stem, thereby separating the three pressing blocks from the locking protrusion, allowing the valve stem to move vertically normally.

[0023] 4. The connection section not only allows for easy pulling to control the lateral movement of the inner shaft, but also enables the inner shaft to be limited for extended periods by inserting a locking block, making it more convenient and preventing the three pressing blocks from obstructing the normal movement of the valve stem. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0025] Figure 2 for Figure 1 Enlarged view of section A in the middle;

[0026] Figure 3 The structure of the execution unit in this embodiment is schematic. Figure 1 ;

[0027] Figure 4 The structure of the execution unit in this embodiment is schematic. Figure 2 (Hidden cover plate)

[0028] In the diagram: 11. Valve body; 12. Flow channel; 13. Valve stem; 131. Locking protrusion; 14. Valve disc; 15. Mounting bracket; 16. Actuator; 21. Actuating disc; 211. Side groove; 22. Fixed base; 23. Bolt; 24. Extrusion block; 241. Arc-shaped surface; 242. Bearing section; 31. Arc-shaped surrounding block; 32. Inner filling block; 321. T-slot; 41. T-block; 51. Screw; 52. Cover plate; 61. Side fixing panel; 611. Extension section; 62. Side fixing seat; 63. Moving inner cavity; 64. Moving inner shaft; 71. Cap; 81. Hollow area; 82. Spring component; 91. Inner hole; 92. Connecting section. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings.

[0030] As attached Figures 1 to 4 As shown;

[0031] This embodiment discloses an automatic ammonia shut-off valve, including a valve body 11, a flow channel 12 formed within the valve body 11, a valve stem 13 movable in a vertical direction disposed within the valve body 11, and a valve disc 14 fixedly disposed at the lower end of the valve stem 13 to cut off the flow channel 12; a mounting bracket 15 fixedly disposed at the upper end of the valve body 11, the valve stem 13 extending upward into the mounting bracket 15, and an actuator 16 fixedly disposed at the upper end of the mounting bracket 15 to provide driving force for the vertical movement of the valve stem 13. The above describes the basic structure of the automatic ammonia shut-off valve, which belongs to the prior art and will not be elaborated upon here.

[0032] The mounting bracket 15 is equipped with a directional locking component, and a locking protrusion 131 is fixedly installed on the left side of the valve stem 13. After the valve disc 14 completely cuts off the flow channel 12, the locking protrusion 131 is aligned with the directional locking component, and the directional locking component will lock the locking protrusion 131 so that the valve stem 13 will not shift.

[0033] The directional locking component includes an actuation unit that cooperates with the locking protrusion 131 to lock it;

[0034] The directional locking component also includes a lateral movement unit that drives the actuator to move closer to or further away from the valve stem 13.

[0035] Specifically, the execution unit includes an execution disk 21. The execution disk 21 has three side grooves 211 regularly opened on its side. Each side groove 211 is provided with a fixed base 22. Each fixed base 22 is fixed with a pressing block 24 by bolts 23. A pressing area is formed between the three pressing blocks 24 for the locking protrusion 131 to enter. After the locking protrusion 131 enters the pressing area, the inner side of each pressing block 24 is in contact with the locking protrusion 131.

[0036] Specifically, the locking protrusion 131 has a circular cross-sectional shape, and each extrusion block 24 has an arc-shaped surface 241 that matches the outer peripheral wall of the locking protrusion 131 and a bearing section 242 that contacts the end of the locking protrusion 131.

[0037] Specifically, the execution disk 21 has three regular arc-shaped blocks 31 inside, and the side grooves 211 are formed between adjacent arc-shaped blocks 31. An inner groove is formed in the middle of the three arc-shaped blocks 31, and an inner filling block 32 is provided in the inner groove. The inner filling block 32 has three regular T-shaped grooves 321 on its side. Each fixed base 22 has a T-shaped block 41 fixedly provided in the corresponding T-shaped groove 321 on its inner side.

[0038] A cover plate 52 is provided on the execution disk 21 by screws 51. The cover plate 52 presses on the inner filling block 32 to fix the inner filling block 32.

[0039] Specifically, the transverse unit includes a side fixing panel 61 fixed on the inner wall of the left side of the mounting bracket 15, a side fixing seat 62 fixed on the right side of the side fixing panel 61, a movable inner cavity 63 is opened in the side fixing seat 62, a movable inner shaft 64 is movably arranged in the movable inner cavity 63, the right side of the movable inner shaft 64 extends out of the movable inner cavity 63 and is fixed on the execution disk 21, and the execution disk 21 is driven to move closer to or away from the valve stem 13 by controlling the movable inner shaft 64;

[0040] A cap 71 is fixedly provided on the right side of the side fixing seat 62, which can contact the movable inner shaft 64 to prevent it from completely disengaging from the movable inner cavity 63.

[0041] Specifically, the movable inner shaft 64 has a hollow area 81, in which a spring member 82 is provided. The side fixed panel 61 has an extension section 611 that extends into the hollow area 81. The extension section 611 contacts the spring member 82 to provide support force, so that the spring member 82 can remain in a compressed state to provide rightward movement force to the movable inner shaft 64.

[0042] Specifically, the side fixing panel 61 and the mounting bracket 15 are fitted with an inner hole 91 for the moving inner shaft 64 to pass through. The left end of the moving inner shaft 64 extends out of the inner hole 91 to the outside, and a connecting section 92 is fixedly provided on the left end of the moving inner shaft 64.

[0043] The working process of this embodiment is as follows:

[0044] In normal conditions, the operator pulls the connecting section 92 to the left and inserts the external locking block to limit the position of the connecting section 92; at this time, there will be a gap between the three pressing blocks 24 and the valve stem 13 and the locking protrusion 131, and the valve stem 13 can move normally in the vertical direction.

[0045] After the valve disc 14 completely cuts off the flow channel 12, the locking protrusion 131 will align with the compression zone. The embedded locking block is removed, and the moving inner shaft 64 will move to the right under the power of the spring 82, so that the locking protrusion 131 enters the compression zone. Then, the three compression blocks 24 will keep in contact with the locking protrusion 131, achieving the purpose of the locking protrusion 131. This can prevent the valve stem 13 from making a slight vertical offset, which would cause a small gap between the valve disc 14 and the valve seat and cause leakage, thus improving stability and safety. At the same time, it can also prevent the operator from misoperating the actuator 16, making it more reliable.

[0046] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. An automatic ammonia shut-off valve, comprising a valve body (11), wherein a flow channel (12) is provided inside the valve body (11), and a valve stem (13) capable of moving in a vertical direction is provided inside the valve body (11), wherein a valve disc (14) capable of cutting off the flow channel (12) is fixedly provided at the lower end of the valve stem (13); a mounting bracket (15) is fixedly provided at the upper end of the valve body (11), wherein the valve stem (13) extends upward into the mounting bracket (15), and an actuator (16) providing a driving force for vertical movement of the valve stem (13) is fixedly provided at the upper end of the mounting bracket (15); characterized in that: The mounting bracket (15) is provided with a directional locking component, and a locking protrusion (131) is fixedly provided on the left side of the valve stem (13). After the valve disc (14) completely cuts off the flow channel (12), the locking protrusion (131) is aligned with the directional locking component, and the directional locking component will lock the locking protrusion (131) so that the valve stem (13) will not deviate. The directional locking component includes an execution unit that cooperates with the locking protrusion (131) to lock it; The directional locking component also includes a lateral movement unit that drives the actuator to move closer to or further away from the valve stem (13).

2. The ammonia automatic shut-off valve according to claim 1, characterized in that: The execution unit includes an execution disk (21). The execution disk (21) has three regular side grooves (211) on its side. Each side groove (211) is provided with a fixed base (22). Each fixed base (22) is fixed with a pressing block (24) by bolts (23). A pressing area is formed between the three pressing blocks (24) for the locking protrusion (131) to enter. After the locking protrusion (131) enters the pressing area, the inner side of each pressing block (24) is in contact with the locking protrusion (131).

3. The ammonia automatic shut-off valve according to claim 2, characterized in that: The locking protrusion (131) has a circular cross-sectional shape, and each of the extrusion blocks (24) has an arc-shaped surface (241) that is adapted to the outer peripheral wall of the locking protrusion (131) and a bearing section (242) that contacts the end of the locking protrusion (131).

4. An automatic ammonia shut-off valve according to claim 2, characterized in that: The execution disk (21) has three regular arc-shaped blocks (31) inside. The side groove (211) is formed between adjacent arc-shaped blocks (31). An inner groove is formed in the middle of the three arc-shaped blocks (31). An inner filling block (32) is provided in the inner groove. The inner filling block (32) has three regular T-shaped grooves (321) on its side. A T-shaped block (41) located in the corresponding T-shaped groove (321) is fixedly provided on the inner side of each fixed base (22). The execution disk (21) is covered with a cover plate (52) by screws (51), and the cover plate (52) presses on the inner filling block (32) to fix the inner filling block (32).

5. An automatic ammonia shut-off valve according to claim 2, characterized in that: The transverse unit includes a side fixing panel (61) fixed on the inner wall of the left side of the mounting bracket (15). A side fixing seat (62) is fixedly provided on the right side of the side fixing panel (61). A movable inner cavity (63) is opened in the side fixing seat (62). A movable inner shaft (64) is movably provided in the movable inner cavity (63). The right side of the movable inner shaft (64) extends out of the movable inner cavity (63) and is fixed on the execution disk (21). The execution disk (21) is driven to move closer to or away from the valve stem (13) by controlling the movable inner shaft (64). The right side of the side fixing seat (62) is fixedly provided with a cap (71) that can contact the movable inner shaft (64) to prevent it from being completely dislodged from the movable inner cavity (63).

6. An automatic ammonia shut-off valve according to claim 5, characterized in that: The movable inner shaft (64) has a hollow area (81), and a spring member (82) is provided in the hollow area (81). The side fixed panel (61) has an extension section (611) that extends into the hollow area (81). The extension section (611) contacts the spring member (82) to provide support force, so that the spring member (82) can be kept in a compressed state to provide rightward movement force to the movable inner shaft (64).

7. An automatic ammonia shut-off valve according to claim 6, characterized in that: The side fixing panel (61) and the mounting bracket (15) are provided with an inner hole (91) for the moving inner shaft (64) to pass through. The left end of the moving inner shaft (64) extends out of the inner hole (91) to the outside. A connecting section (92) is fixedly provided on the left end of the moving inner shaft (64).

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