A high-risk working condition intelligent diagnosis cut-off valve in the field of molten salt

Abstract

The utility model relates to the technical field of fused salt, concretely to a high-risk working condition intelligent diagnosis stop valve in the field of fused salt, including valve body and upper valve body, the upper surface fixed connection of valve body has lower flange, and lower flange and upper valve body are fixed and installed together through fixed bolt, and the medium flow cavity is formed between valve body and upper valve body, the upper surface center of upper valve body is equipped with the work groove that penetrates, and the valve rod is arranged in the work groove, the bottom end of valve rod extends to the inside of medium flow cavity, and the bottom end of valve rod is fixedly connected with the prevention of rotary valve half. The high-risk working condition intelligent diagnosis stop valve in the field of fused salt is equipped with a gas detector, which can monitor in real time whether the key part of the valve has a leakage, and once the bellows is damaged, harmful gas leaks into the work groove and the detection channel, the detector immediately issues an alarm, so that the operator can know the leakage danger in the first time and take emergency measures in time.

Description

Technical Field

[0001] The utility model relates to the technical field of molten salt, in particular to a globe valve for intelligent diagnosis of high-risk working conditions in the molten salt field. Background Technique

[0002] In the field of molten salt-related industrial production, various chemical reactions and material transfer processes are complex and have a high risk coefficient. During the production process, a variety of toxic gases and highly harmful substances such as cyanides are generated. In the conveying and control links of the pipeline system, as a key opening and closing component, the sealing performance of the valve is crucial. Once the valve leaks, it will not only cause material loss and pollute the production environment, but also pose a serious threat to the life and health of on-site operators. At the same time, it may cause damage to production equipment, trigger a chain reaction, and cause huge economic losses and safety hazards.

[0003] When traditional globe valves face highly corrosive, highly toxic and highly permeable media under molten salt working conditions, the sealing structure often fails to maintain reliability for a long time, and lacks real-time monitoring and timely warning functions for leakage situations, making it difficult to meet the strict safety requirements of the production process under such special working conditions. Content of the Utility Model

[0004] The purpose of the utility model is to provide a globe valve for intelligent diagnosis of high-risk working conditions in the molten salt field, so as to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A globe valve for intelligent diagnosis of high-risk working conditions in the molten salt field includes a valve body and an upper valve body. A lower flange is fixedly connected to the upper surface of the valve body, and the lower flange and the upper valve body are fixedly installed together through fixing bolts. A medium flow cavity is formed between the valve body and the upper valve body. A through working groove is opened at the center of the upper surface of the upper valve body. A valve stem is inserted into the working groove. The bottom end of the valve stem extends into the medium flow cavity. A non-rotating valve flap is fixedly connected to the bottom end of the valve stem. The shape of the non-rotating valve flap matches the medium flow cavity and is used to block the air inlet of the medium flow cavity. An elastic corrugated sheet is fixedly installed on the bottom surface of the upper valve body. A bellows is fixedly connected to the elastic corrugated sheet. The bellows is sleeved on the outer surface of the valve stem, and the bottom end of the bellows is welded to the valve stem;

[0007] The upper end of the valve stem extends to the top of the upper valve body. A sealing groove is provided on the upper surface of the working groove. A packing sleeve is installed inside the sealing groove. The packing sleeve is fitted on the outer surface of the valve stem. A valve stem sealing packing is provided inside the packing sleeve and contacts the surface of the valve stem. A sealing flange is fitted on the outer surface of the valve stem. The sealing flange is installed on the upper valve body to compress the packing sleeve. A connecting sleeve is fixedly installed on the upper surface of the sealing flange. A valve stem nut is rotatably installed inside the connecting sleeve. A thread is provided on the outer surface of the top end of the valve stem. The valve stem nut is fitted on the outer surface of the valve stem and is threaded to the valve stem. The top end of the valve stem nut extends to the top of the connecting sleeve, and a handwheel is fixedly installed on its outer surface.

[0008] A detection channel is provided on the side of the upper valve body. One end of the detection channel is connected to the working groove. A gas detector is fixedly installed on the side of the upper valve body. The detection end of the gas detector is sealed and installed inside the detection channel.

[0009] Preferably, a sealing ring is fixedly connected to the bottom surface of the upper valve body, and an elastic corrugated sheet is fixedly installed on the sealing ring. A groove is provided on the upper surface of the valve body to accommodate the sealing ring and the elastic corrugated sheet. A graphite sealing gasket is fixedly installed inside the groove. The graphite sealing gasket abuts against the elastic corrugated sheet. A dead seal is formed between the sealing ring, the groove, the elastic corrugated sheet and the graphite sealing gasket to prevent harmful gases from flowing out from the gap between the lower flange and the upper valve body.

[0010] Preferably, a metal seal is installed between the upper valve body and the elastic bellows, the metal seal is sleeved on the outer surface of the valve stem, and there is an adjustment space between the metal seal and the upper valve body.

[0011] Preferably, an upper connecting flange is fixedly connected to the top outer surface of the upper valve body, and multiple fixing bolts are fixedly installed on the upper surface of the upper connecting flange. The top of each fixing bolt extends to the upper surface of the sealing flange, and nuts are screwed onto the top outer surface of each fixing bolt for fixing the sealing flange onto the upper connecting flange.

[0012] Preferably, a spring is provided between the nut and the sealing flange, and the spring is sleeved on the outer surface of the fixing bolt.

[0013] Compared with the prior art, this utility model provides a shut-off valve for intelligent diagnosis of high-risk working conditions in the molten salt field, which has the following beneficial effects:

[0014] This intelligent diagnostic gate valve for high-risk operating conditions in the molten salt field employs a multi-seal structure, including elastic bellows, bellows, graphite gaskets, metal seals, packing sleeves, and valve stem sealing packing, which seal the valve from different positions and directions. These components work together to greatly enhance the valve's sealing performance under long-term high temperature, high pressure, and highly corrosive media impacts in molten salt conditions, effectively preventing the leakage of harmful gases and ensuring the safety of the production environment.

[0015] This intelligent diagnostic shut-off valve for high-risk operating conditions in the molten salt field is equipped with a gas detector that can monitor key parts of the valve for leaks in real time. Once the bellows is damaged and harmful gases leak into the working tank and detection channel, the detector will immediately issue an alarm, enabling operators to be aware of the leak hazard at the first opportunity and take timely emergency measures, such as closing relevant valves, evacuating personnel, and carrying out maintenance, to prevent the accident from escalating and minimize the losses to personnel, equipment, and production caused by the leak. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 for Figure 1 Enlarged view of the structure at point A in the middle;

[0018] Figure 3 for Figure 1 Enlarged view of the structure at point B in the middle.

[0019] In the diagram: 1. Valve body; 2. Lower flange; 3. Upper valve body; 4. Valve stem; 5. Anti-rotation valve disc; 6. Bellows; 7. Metal seal; 8. Packing sleeve; 9. Elastic bellows; 10. Graphite gasket; 11. Valve stem sealing packing; 12. Fixing bolt; 13. Detection channel; 14. Gas detector; 15. Upper connecting flange; 16. Fixing bolt II; 17. Nut; 18. Spring; 19. Connecting sleeve; 20. Valve stem nut; 21. Handwheel; 22. Sealing flange. Detailed Implementation

[0020] Please see Figure 1-3A shut-off valve for intelligent diagnosis of high-risk working conditions in molten salt fields includes a valve body 1 and an upper valve body 3. A lower flange 2 is fixedly connected to the upper surface of the valve body 1. The lower flange 2 and the upper valve body 3 are fixedly installed together by fixing bolts 12, forming a medium flow cavity between the valve body 1 and the upper valve body 3. A through working groove is opened at the center of the upper surface of the upper valve body 3. A valve stem 4 is inserted inside the working groove. The bottom end of the valve stem 4 extends into the interior of the medium flow cavity. An anti-rotation valve disc 5 is fixedly connected to the bottom end of the valve stem 4. The shape of the anti-rotation valve disc 5 matches the medium flow cavity and is used to block the air inlet of the medium flow cavity. An air outlet is provided on the back of the valve body 1. When the valve stem 4 drives the anti-rotation valve disc 5 to move upward, it opens the air inlet. When the valve is in the open state, the air inlet, the medium flow chamber and the air outlet form a channel. When the valve stem 4 moves downward, the valve is in the closed state to prevent the valve disc 5 from sticking to the medium flow chamber and blocking the air inlet. An elastic bellows 9 is fixedly installed on the bottom surface of the upper valve body 3. A bellows 6 is fixedly connected to the elastic bellows 9. The elastic bellows 9 has a certain elasticity, which can support the bellows 6 and isolate the medium flow chamber from the upper working groove, and facilitate the sealing of the medium flow chamber. The bellows 6 is sleeved on the outer surface of the valve stem 4. The bottom end of the bellows 6 is welded to the valve stem 4, which can isolate the working groove and the medium flow chamber and prevent harmful gases from flowing out through the gap between the working groove and the valve stem 4.

[0021] A temperature sensor is also installed on the outer surface of the valve body 1 to detect the surface temperature of the valve body 1 during operation. When the surface of the valve body 1 is overheated, an alarm is issued to remind the staff. The outer surface of the shut-off valve can also be covered with an insulation sleeve to prevent the valve body 1 from being too cold and affecting the flow of the medium.

[0022] The upper valve body 3 has a sealing ring fixedly connected to its bottom surface, and an elastic corrugated sheet 9 is fixedly installed on the sealing ring. The upper surface of the valve body 1 has a groove for accommodating the sealing ring and the elastic corrugated sheet 9. A graphite sealing gasket 10 is fixedly installed inside the groove. The graphite sealing gasket 10 abuts against the elastic corrugated sheet 9. A dead seal is formed between the sealing ring, the groove, the elastic corrugated sheet 9, and the graphite sealing gasket 10 to prevent harmful gases from flowing out from the gap between the lower flange 2 and the upper valve body 3. A metal seal 7 is installed between the upper valve body 3 and the elastic corrugated sheet 9. The metal seal 7 is sleeved on the outer surface of the valve stem 4. There is an adjustment space between the metal seal 7 and the upper valve body 3.

[0023] During the operation of the gate valve, the bellows 6 extends and retracts with the movement of the valve stem 4. The multiple sealing lines formed by the bellows 6, the elastic bellows 9, the graphite gasket 10, and the metal seal 7 can effectively prevent harmful gases from leaking from the gap between the valve stem 4 and the upper valve body 3, as well as the gap between the lower flange 2 and the upper valve body 3.

[0024] The upper end of the valve stem 4 extends above the upper valve body 3. A sealing groove is provided on the upper surface of the working groove. A packing sleeve 8 is installed inside the sealing groove. The packing sleeve 8 is fitted on the outer surface of the valve stem 4. A valve stem sealing packing 11 is provided inside the packing sleeve 8 and contacts the surface of the valve stem 4. A sealing flange 22 is fitted on the outer surface of the valve stem 4. The sealing flange 22 is installed on the upper valve body 3 to compress the packing sleeve 8. A connecting sleeve 19 is fixedly installed on the upper surface of the sealing flange 22. A valve stem nut 20 is rotatably installed inside the connecting sleeve 19. A thread is provided on the outer surface of the top end of the valve stem 4. The valve stem nut 20 is fitted on the outer surface of the valve stem 4 and is threadedly connected to the valve stem 4. The top end of the valve stem nut 20 extends above the connecting sleeve 19, and a handwheel 21 is fixedly installed on its outer surface.

[0025] When the valve needs to be closed, turn the handwheel 21. Through the threaded engagement between the valve stem nut 20 and the valve stem 4, the valve stem 4 moves downward, preventing the valve disc 5 from sticking tightly to the medium flow chamber, blocking the air inlet, and preventing the medium from flowing. When the valve is opened, turn the handwheel 21 in the opposite direction. The valve stem 4 moves upward, preventing the valve disc 5 from disengaging from the air inlet, and the medium can flow in the flow chamber.

[0026] The upper valve body 3 is fixedly connected to the top outer surface of the upper connecting flange 15. Multiple fixing bolts 16 are fixedly installed on the upper surface of the upper connecting flange 15. The top of each fixing bolt 16 extends to the upper surface of the sealing flange 22. Nuts 17 are screwed onto the top outer surface of each fixing bolt 16 to fix the sealing flange 22 on the upper connecting flange 15. This facilitates fixing the sealing flange 22 on the upper valve body 3 and also compresses the packing sleeve to prevent air leakage from the gap between the upper opening of the working groove and the valve stem 4, which would affect the sealing effect of the gate valve.

[0027] Furthermore, a spring 18 is provided between the nut 17 and the sealing flange 22. The spring 18 is sleeved on the outer surface of the fixing bolt 16, and the preload is adjusted by means of the spring 18 to ensure that the entire valve structure can remain stable under complex working conditions such as long-term vibration and thermal expansion and contraction, thereby extending the service life of the valve and reducing maintenance and replacement costs.

[0028] A detection channel 13 is provided on the side of the upper valve body 3. One end of the detection channel 13 is connected to the working groove. A gas detector 14 is fixedly installed on the side of the upper valve body 3. The detection end of the gas detector 14 is sealed inside the detection channel 13. When the gas detector 14 detects gas inside the detection channel 13, it will generate an electrical signal. The gas detector 14 is also electrically connected to an alarm. When an electrical signal is generated, the alarm will be activated, triggering an alarm and reminding staff to handle the situation in time.

[0029] If the bellows 6 is damaged, the gas inside the shut-off valve may enter the working tank. The gas detector 14 on the side of the upper valve body 3 monitors the presence of gas in the working tank in real time through the detection channel 13. Once the leaking gas is detected, an alarm is triggered immediately to remind the staff to deal with it in time.

[0030] Working principle: This intelligent diagnostic shut-off valve for high-risk working conditions in the molten salt field operates under molten salt conditions. The valve stem 4 moves up and down, causing the valve disc 5 to control the opening and closing of the air inlet of the medium flow chamber. When the valve needs to be closed, the handwheel 21 is turned, and the valve stem 4 moves downwards through the threaded engagement of the valve stem nut 20 and the valve stem 4, preventing the valve disc 5 from pressing tightly against the medium flow chamber, blocking the air inlet, and preventing medium flow. When the valve is opened, the handwheel 21 is turned in the opposite direction, causing the valve stem 4 to move upwards, preventing the valve disc 5 from disengaging from the air inlet, allowing the medium to flow within the flow chamber.

[0031] Throughout the process, the bellows 6 expands and contracts as the valve stem 4 moves. The multiple sealing lines formed by the bellows 6, the elastic bellows 9, the graphite gasket 10, and the metal seal 7 can effectively prevent harmful gases from leaking from the gap between the valve stem 4 and the upper valve body 3, as well as the gap between the lower flange 2 and the upper valve body 3.

[0032] If the bellows 6 is damaged, the gas inside the shut-off valve may enter the working tank. The gas detector 14 on the side of the upper valve body 3 monitors the presence of gas in the working tank in real time through the detection channel 13. Once leaking gas is detected, an alarm is immediately triggered to remind the staff to deal with it in time.

Claims

1. A shut-off valve for intelligent diagnosis of high-risk working conditions in molten salt fields, comprising a valve body (1) and an upper valve body (3), wherein a lower flange (2) is fixedly connected to the upper surface of the valve body (1), and the lower flange (2) and the upper valve body (3) are fixedly installed together by fixing bolts (12), and a medium flow cavity is formed between the valve body (1) and the upper valve body (3), characterized in that: A through working groove is provided at the center of the upper surface of the upper valve body (3). A valve stem (4) is inserted inside the working groove. The bottom end of the valve stem (4) extends into the interior of the medium flow cavity. An anti-rotation valve disc (5) is fixedly connected to the bottom end of the valve stem (4). The shape of the anti-rotation valve disc (5) matches the medium flow cavity and is used to block the air inlet of the medium flow cavity. An elastic corrugated sheet (9) is fixedly installed on the bottom surface of the upper valve body (3). A bellows tube (6) is fixedly connected to the elastic corrugated sheet (9). The bellows tube (6) is sleeved on the outer surface of the valve stem (4). The bottom end of the bellows tube (6) is welded to the valve stem (4). The upper end of the valve stem (4) extends to the upper valve body (3). A sealing groove is provided on the upper surface of the working groove. A packing sleeve (8) is installed inside the sealing groove. The packing sleeve (8) is fitted on the outer surface of the valve stem (4). A valve stem sealing packing (11) is provided inside the packing sleeve (8) and contacts the surface of the valve stem (4). A sealing flange (22) is fitted on the outer surface of the valve stem (4). The sealing flange (22) is installed on the upper valve body (3) to compress the packing sleeve (8). A connecting sleeve (19) is fixedly installed on the upper surface of the sealing flange (22). A valve stem nut (20) is rotatably installed inside the connecting sleeve (19). A thread is provided on the outer surface of the top end of the valve stem (4). The valve stem nut (20) is fitted on the outer surface of the valve stem (4) and threadedly connected to the valve stem (4). The top end of the valve stem nut (20) extends to the upper part of the connecting sleeve (19), and a handwheel (21) is fixedly installed on its outer surface. The upper valve body (3) has a detection channel (13) on its side. One end of the detection channel (13) is connected to the working groove. A gas detector (14) is fixedly installed on the side of the upper valve body (3). The detection end of the gas detector (14) is sealed and installed inside the detection channel (13).

2. The shut-off valve for intelligent diagnosis of high-risk working conditions in the molten salt field according to claim 1, characterized in that: A sealing ring is fixedly connected to the bottom surface of the upper valve body (3), and the elastic corrugated sheet (9) is fixedly installed on the sealing ring. A groove is provided on the upper surface of the valve body (1) to accommodate the sealing ring and the elastic corrugated sheet (9). A graphite sealing gasket (10) is fixedly installed inside the groove. The graphite sealing gasket (10) abuts against the elastic corrugated sheet (9). A dead seal is formed between the sealing ring, the groove, the elastic corrugated sheet (9) and the graphite sealing gasket (10) to prevent harmful gases from flowing out from the gap between the lower flange (2) and the upper valve body (3).

3. The shut-off valve for intelligent diagnosis of high-risk working conditions in the molten salt field according to claim 1, characterized in that: A metal seal (7) is installed between the upper valve body (3) and the elastic corrugated sheet (9). The metal seal (7) is sleeved on the outer surface of the valve stem (4). There is an adjustment space between the metal seal (7) and the upper valve body (3).

4. The shut-off valve for intelligent diagnosis of high-risk working conditions in the molten salt field according to claim 1, characterized in that: An upper connecting flange (15) is fixedly connected to the top outer surface of the upper valve body (3). Multiple fixing bolts (16) are fixedly installed on the upper surface of the upper connecting flange (15). The top of each fixing bolt (16) extends to the upper surface of the sealing flange (22). Nuts (17) are screwed onto the top outer surface of each fixing bolt (16) for fixing the sealing flange (22) onto the upper connecting flange (15).

5. The shut-off valve for intelligent diagnosis of high-risk working conditions in the molten salt field according to claim 1, characterized in that: A spring (18) is provided between the nut (17) and the sealing flange (22), and the spring (18) is sleeved on the outer surface of the fixing bolt (16).

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