Low-temperature-resistant corrugated pipe stop valve capable of preventing sealing valve seat from deforming and using method of low-temperature-resistant corrugated pipe stop valve

Abstract

The invention discloses a low-temperature-resistant corrugated pipe stop valve capable of preventing a sealing valve seat from deforming and a using method thereof, and relates to the technical field of corrugated pipe stop valves, the low-temperature-resistant corrugated pipe stop valve comprises a valve body, the sealing valve seat and a protective casting, and the sealing valve seat is arranged on the inner wall of the valve body. The first ethylene propylene rubber sealing gasket covering the inner wall of the through groove in the top of the protective casting, the movably-connected sealing block and the first ethylene propylene rubber sealing ring fixed to the outer wall of the sealing block form a multi-layer sealing guarantee, and the second ethylene propylene rubber sealing ring on the outer side of the bottom of the protective casting further enhances the sealing performance; a first hydraulic cylinder and a second hydraulic cylinder which are embedded in the bottom of the valve element drive a first sealing ring, a second sealing ring, a second ethylene propylene rubber sealing gasket and a first stainless steel corrugated pipe to achieve the sealing effect correspondingly, meanwhile, the adopted ethylene propylene rubber and stainless steel materials are low-temperature-resistant materials, and therefore the low-temperature-resistant performance and the sealing performance of the valve are improved; and deformation of the sealing valve seat is effectively prevented, and long-term stable operation of the valve is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of bellows globe valves, and in particular to a cryogenic-resistant bellows globe valve for preventing deformation of a sealing valve seat and a using method thereof. Background Art

[0002] A bellows globe valve, also known as a bellows seal globe valve, forms a metal barrier between a fluid medium and the atmosphere through automatic roll welding to ensure a zero-leakage design of the valve stem. The bellows globe valve adopts a bellows structure inside. The lower end of the stainless steel bellows is welded to the valve stem to prevent the process fluid from corroding the valve stem.

[0003] The defects of the existing cryogenic-resistant bellows globe valves are as follows: 1. The patent document US4986452A discloses a pumping device for a liquid container. However, the device in the above document has the technical problem that it is difficult to ensure the stable operation of the valve in a long-term low-temperature environment; 2. The patent document US4410000A discloses a pressure control device for at least two pressure vessels. However, the device in the above document has the technical problem that during long-term use, the pressure acting on the sealing valve seat cannot be reduced, resulting in deformation of the sealing valve seat; 3. The patent document US4193418A discloses a device for preventing overpressure in a globe valve housing. However, when the globe valve in the above document is in use, there is a technical problem that it is impossible to detect in real time whether the valve stem inside the second stainless steel bellows is immersed in water; 4. The patent document CN102052469A discloses a bellows globe valve. However, when the bellows globe valve in the above document is in use, there is a technical problem that the opening degree of the valve cannot be accurately obtained. Summary of the Invention

[0004] The purpose of the present invention is to provide a cryogenic-resistant bellows globe valve for preventing deformation of a sealing valve seat and a using method thereof, so as to solve the technical problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A cryogenic-resistant bellows globe valve for preventing deformation of a sealing valve seat, comprising a valve body, a sealing valve seat and a protective casting. The inner wall of the valve body is provided with a sealing valve seat. An installation hole is arranged at the top of the sealing valve seat, and a protective casting is connected inside the installation hole by means of threading; A through groove is provided in the middle of the top of the protective casting, the inner wall of the through groove is covered with a first EPDM rubber sealing pad, the inner wall of the first EPDM rubber sealing pad is movably connected with a sealing block, the outer wall of the sealing block is provided with a group of first EPDM rubber sealing rings, and the outer wall of the first EPDM rubber sealing ring is movably connected to the inner wall of the first EPDM rubber sealing pad, a second EPDM rubber sealing ring is provided on the outer side of the bottom of the protective casting, and the bottom of the second EPDM rubber sealing ring is movably connected to the outer wall of the sealing valve seat; A valve core is fixedly connected to the top of the sealing block, and a plurality of first hydraulic cylinders and a plurality of second hydraulic cylinders are embedded on the outer side of the bottom of the valve core. A first sealing ring is fixedly connected to the bottom of the first hydraulic cylinder, and a second sealing ring is fixedly connected to the bottom of the second hydraulic cylinder, and the diameter of the first sealing ring is smaller than the diameter of the second sealing ring. A second EPDM rubber sealing gasket is fixedly connected to the bottom of the first sealing ring and the second sealing ring, and a first stainless steel bellows is fixedly connected to the outer side of the top of the first sealing ring and the second sealing ring.

[0006] Preferably, the valve body, the sealing valve seat, the protective casting and the valve core are all made of low-temperature resistant alloys, and the low-temperature resistant alloys used include nickel-based alloys or titanium alloys.

[0007] Preferably, a plurality of reinforcing plates are fixedly connected to the outer wall of the sealing valve seat, and the other end of the reinforcing plate is fixedly connected to the inner wall of the valve body.

[0008] Preferably, a connecting seat is provided on the top of the valve body, a valve cavity is provided inside the connecting seat, and the bottom of the valve cavity is penetrated and arranged on the top of the valve body, a fixed disc is fixedly connected to the inner wall of the valve cavity, a second stainless steel bellows is fixedly connected to the outer side of the bottom of the fixed disc, and the other end of the second stainless steel bellows is fixedly connected to the outer side of the top of the valve core.

[0009] Preferably, a connecting groove is provided in the middle of the top of the valve core, the inner wall of the connecting groove is movably connected to a connecting block, the top of the connecting block is fixedly connected to a valve stem, and the outer wall thread of the valve stem penetrates the fixed disc, a water immersion sensor component is provided on the top of the valve core, and the position of the water immersion sensor component is located inside the second stainless steel bellows, and one end of the valve stem is fixedly connected to a rotating disc.

[0010] Preferably, the top of the connecting seat is fixedly connected to a fixing plate, the top of the fixing plate is connected to a storage plate by bolts, the front end and the tail end of the top of the storage plate are fixedly connected to a supporting plate, the top of the supporting plate is fixedly connected to a top plate, a protective box is provided on the top of the top plate, the top of the protective box is fixedly connected to a limiting frame, and threaded holes are provided in the middle of the tops of the connecting seat, the fixing plate, the storage plate, the top plate and the limiting frame, and the inner wall of the threaded hole is threadedly connected to the outer wall of the valve stem.

[0011] Preferably, a controller component is provided on the inner wall of the protective box, a through hole is provided on the top of the controller component, and the inner wall of the through hole is movably connected to the outer wall of the valve stem, laser ranging components are embedded on both sides of the bottom of the controller component, and the bottom of the laser ranging component passes through the top of the top plate, a data collection component is provided inside the controller component, and the data collection component is used to collect data sent by the water immersion sensor component and the laser ranging component, a communication component is provided inside the controller component, and the communication component is electrically connected to the data collection component, and the communication component is used to send the data collected by the data collection component to the staff by wired or wireless means.

[0012] Preferably, the outer wall of the valve stem is fixedly connected to a limiting disk, a reflecting ring is embedded on the outer side of the top of the limiting disk, and the reflecting ring is located below the laser ranging component.

[0013] Preferably, the working steps of the low-temperature resistant bellows stop valve for preventing the sealing valve seat from deforming are as follows: S1. Turn the rotating disk to drive the connecting block and valve core upward through the valve stem, thereby opening the valve; S2, the rotating disk is rotated in the opposite direction, and the connecting block and the valve core are driven to move downward through the valve stem, thereby closing the valve. During the movement of the valve core, the first hydraulic cylinder and the second hydraulic cylinder drive the first sealing ring, the second sealing ring, the second EPDM rubber sealing pad and the first stainless steel bellows to form a multi-layer sealing structure; S3, the water immersion sensor component will continuously monitor the leakage inside the second bellows. Once a leakage is detected, the water immersion sensor component will send out a signal to alarm; S4. The laser ranging component measures the position of the reflective ring periodically or as needed, thereby indirectly monitoring the position and movement of the valve core.

[0014] Preferably, the step S2 further includes the following steps: S21. The first EPDM rubber sealing pad covering the inner wall of the top through groove of the protective casting and the movably connected sealing block and the first EPDM rubber sealing ring fixed to the outer wall form a multi-layer sealing guarantee, and the second EPDM rubber sealing ring on the outer side of the bottom of the protective casting further enhances the sealing performance.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the settings of the valve body, sealing valve seat, mounting hole and protective casting, the first ethylene propylene diene monomer (EPDM) rubber gasket covering the inner wall of the through groove at the top of the protective casting, the sealing block connected movably, and the first EPDM rubber sealing ring fixed to its outer wall form a multi-layer sealing guarantee. The second EPDM rubber sealing ring on the outer side of the bottom of the protective casting further enhances the sealing performance. The first hydraulic cylinder and the second hydraulic cylinder embedded at the bottom of the valve core drive the first sealing ring, the second sealing ring, the second EPDM rubber gasket and the first stainless steel bellows respectively to achieve the sealing effect. At the same time, the EPDM rubber and stainless steel materials used are both low-temperature resistant materials. Therefore, not only the low-temperature resistance and sealing performance of the valve are improved, but also the deformation of the sealing valve seat is effectively prevented, ensuring the long-term stable operation of the valve; 2. Through the setting of the multi-layer sealing structure formed by the mounting hole, the protective casting, the first EPDM rubber gasket, the sealing block and the first EPDM rubber sealing ring, not only can the sealing performance of the valve be enhanced, but also the effect of dispersing pressure and stress can be achieved, reducing the pressure directly acting on the sealing valve seat, and then reducing the risk of deformation of the sealing valve seat; 3. Through the settings of the valve cavity, the fixed disc and the second stainless steel bellows, not only the connection stability between the valve core and the valve body is enhanced, but also through the elastic setting of the second stainless steel bellows, additional deformation compensation ability is provided for the valve, which helps to prevent seal failure caused by pressure or temperature changes. Furthermore, through the water immersion sensor component installed at the top of the valve core, whose position is inside the second stainless steel bellows, it can monitor in real time whether there is water intrusion inside the second stainless steel bellows, so as to give early warning of potential leakage risks in a timely manner, which is beneficial to improving the sealing performance, operation convenience and safety of the valve, ensuring the long-term stable operation of the valve under extreme conditions; 4. Through the settings of the fixed plate, the storage plate, the support plate, the top plate and the protective box on the top of the connecting seat, not only a solid installation foundation is provided for the valve, but also it is tightly connected with the valve rod through the threaded holes opened, ensuring the stable operation of the valve. The controller component in the protective box can monitor the positions of the valve rod and the limit disc in real time through the laser ranging component embedded at its bottom, realizing the precise control of the opening degree of the valve. The data collection component inside the controller component can efficiently collect the data of the water immersion sensor component, while the communication component is responsible for sending these data to the staff in real time, ensuring the timely monitoring of the valve state. In addition, the design of the reflection ring on the top of the limit disc further enhances the ranging accuracy of the laser ranging component, and thus can improve the operation convenience, monitoring accuracy and intelligent level of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the schematic diagram of the overall structure of the present invention; Figure 2 is the sectional schematic diagram of the overall structure of the present invention; Figure 3 Structural schematic diagram of part A in Figure 2 the present invention; Figure 4 Structural schematic diagram of the second ethylene-propylene rubber gasket in the present invention; Figure 5 Structural schematic diagram of one side of the whole of the present invention; Figure 6 Structural schematic diagram of part B in Figure 5 the present invention; Figure 7 Schematic flow diagram of the controller component of the present invention; Figure 8 Schematic flow diagram of the working steps of the present invention.

[0017] In the figure: 1. Valve body; 2. Sealing valve seat; 3. Protective casting; 4. Mounting hole; 5. Through groove; 6. First ethylene-propylene rubber gasket; 7. Sealing block; 8. First ethylene-propylene rubber sealing ring; 9. Second ethylene-propylene rubber sealing ring; 10. Valve core; 11. First hydraulic cylinder; 12. Second hydraulic cylinder; 13. First sealing ring; 14. Second sealing ring; 15. Second ethylene-propylene rubber gasket; 16. First stainless steel bellows; 17. Reinforcing plate; 18. Connecting seat; 19. Valve cavity; 20. Fixed disc; 21. Second stainless steel bellows; 22. Connecting groove; 23. Connecting block; 24. Valve rod; 25. Water immersion sensor component; 26. Fixed plate; 27. Storage plate; 28. Support plate; 29. Top plate; 30. Protective box; 31. Limiting frame; 32. Threaded hole; 33. Controller component; 34. Through hole; 35. Laser ranging component; 36. Data collection component; 37. Communication component; 38. Limiting disc; 39. Reflective ring; 40. Rotating disc. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] Example 1: Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The present invention provides an embodiment: a low-temperature resistant bellows stop valve for preventing deformation of a sealing valve seat, comprising a valve body 1, a sealing valve seat 2 and a protective casting 3, wherein the inner wall of the valve body 1 is provided with a sealing valve seat 2, the top of the sealing valve seat 2 is provided with a mounting hole 4, and the interior of the mounting hole 4 is connected with the protective casting 3 through a thread; A through groove 5 is provided in the middle of the top of the protective casting 3, the inner wall of the through groove 5 is covered with a layer of a first EPDM rubber sealing pad 6, the inner wall of the first EPDM rubber sealing pad 6 is movably connected with a sealing block 7, the outer wall of the sealing block 7 is provided with a group of first EPDM rubber sealing rings 8, and the outer wall of the first EPDM rubber sealing ring 8 is movably connected to the inner wall of the first EPDM rubber sealing pad 6, a second EPDM rubber sealing ring 9 is provided on the outer side of the bottom of the protective casting 3, and the bottom of the second EPDM rubber sealing ring 9 is movably connected to the outer wall of the sealing valve seat 2; The top of the sealing block 7 is fixedly connected with a valve core 10, and the outer side of the bottom of the valve core 10 is embedded with a plurality of first hydraulic cylinders 11 and a plurality of second hydraulic cylinders 12. The bottom of the first hydraulic cylinder 11 is fixedly connected with a first sealing ring 13, and the bottom of the second hydraulic cylinder 12 is fixedly connected with a second sealing ring 14, and the diameter of the first sealing ring 13 is smaller than the diameter of the second sealing ring 14. The bottoms of the first sealing ring 13 and the second sealing ring 14 are both fixedly connected with a second EPDM rubber gasket 15, and the outer sides of the tops of the first sealing ring 13 and the second sealing ring 14 are both fixedly connected with a first stainless steel bellows 16; Furthermore, through the arrangement of the valve body 1, the sealing valve seat 2, the mounting hole 4 and the protective casting 3, the first EPDM rubber sealing pad 6 covered on the inner wall of the through groove 5 at the top of the protective casting 3 and the movably connected sealing block 7 and the first EPDM rubber sealing ring 8 fixed on the outer wall form a multi-layer sealing guarantee, and the second EPDM rubber sealing ring 9 on the outer side of the bottom of the protective casting 3 further enhances the sealing performance. The first hydraulic cylinder 11 and the second hydraulic cylinder 12 embedded in the bottom of the valve core 10 respectively drive the first sealing ring 13, the second sealing ring 14, the second EPDM rubber sealing pad 15 and the first stainless steel bellows 16 to achieve the sealing effect. At the same time, the EPDM rubber and stainless steel materials used are both low-temperature resistant materials, which not only improves the low-temperature resistance and sealing performance of the valve, but also effectively prevents the deformation of the sealing valve seat 2, ensuring the long-term stable operation of the valve; The arrangement of the multi-layer sealing structure formed by the mounting hole 4, the protective casting 3, the first EPDM rubber sealing pad 6, the sealing block 7 and the first EPDM rubber sealing ring 8 can not only enhance the sealing performance of the valve, but also achieve the effect of dispersing pressure and stress, reduce the pressure directly acting on the sealing valve seat 2, and thereby reduce the risk of deformation of the sealing valve seat 2.

[0022] Example 2: Please refer to Figure 2 , an embodiment provided by the present invention: the valve body 1, the sealing valve seat 2, the protective casting 3 and the valve core 10 are all made of low-temperature resistant alloy, and the low-temperature resistant alloy used includes nickel-based alloy or titanium alloy; A plurality of reinforcing plates 17 are fixedly connected to the outer wall of the sealing valve seat 2, and the other end of the reinforcing plate 17 is fixedly connected to the inner wall of the valve body 1; Furthermore, by using low-temperature resistant nickel-based alloy or titanium alloy to prepare the valve body 1, sealing valve seat 2, protective casting 3 and valve core 10, the strength and toughness of the valve in a low-temperature environment can be improved, ensuring its stable operation under extreme conditions. At the same time, the reinforcing plate 17 fixedly connected to the outer wall of the sealing valve seat 2 not only enhances the connection strength between the sealing valve seat 2 and the valve body 1, but also improves the overall structural stability of the valve, effectively preventing the deformation of the sealing valve seat 2 caused by temperature changes or pressure fluctuations, thereby enabling the stop valve to have higher reliability and durability while maintaining excellent sealing performance and flexible flow control, and is suitable for various harsh industrial application environments.

[0023] Example 3: Please refer to Figure 2 , Figure 5 and Figure 6, An embodiment provided by the present invention: A connection seat 18 is provided at the top of the valve body 1. A valve cavity 19 is provided inside the connection seat 18, and the bottom of the valve cavity 19 penetrates through the top of the valve body 1. A fixed disk 20 is fixedly connected to the inner wall of the valve cavity 19. The outer side of the bottom of the fixed disk 20 is fixedly connected to a second stainless steel bellows 21, and the other end of the second stainless steel bellows 21 is fixedly connected to the outer side of the top of the valve core 10; A connection groove 22 is provided in the middle of the top of the valve core 10. A connection block 23 is movably connected to the inner wall of the connection groove 22. A valve rod 24 is fixedly connected to the top of the connection block 23, and the outer wall of the valve rod 24 threadedly penetrates through the fixed disk 20. A water immersion sensor component 25 is provided at the top of the valve core 10, and the position of the water immersion sensor component 25 is inside the second stainless steel bellows 21. One end of the valve rod 24 is fixedly connected to a rotating disk 40; Furthermore, through the settings of the valve cavity 19, the fixed disk 20 and the second stainless steel bellows 21, not only the connection stability between the valve core 10 and the valve body 1 is enhanced, but also through the elastic setting of the second stainless steel bellows 21, additional deformation compensation ability is provided for the valve, which helps to prevent seal failure caused by pressure or temperature changes. Additionally, through the water immersion sensor component 25 installed at the top of the valve core 10, whose position is inside the second stainless steel bellows 21, it can monitor in real time whether there is moisture intrusion inside the second stainless steel bellows 21, thereby warning potential leakage risks in a timely manner, which is beneficial to improving the sealing performance, operation convenience and safety of the valve, and ensuring the long-term stable operation of the valve under extreme conditions.

[0024] Embodiment 4: Please refer to Figure 1 , Figure 2 and Figure 7 , An embodiment provided by the present invention: A fixing plate 26 is fixedly connected to the top of the connection seat 18. A storage plate 27 is bolted to the top of the fixing plate 26. Support plates 28 are fixedly connected to the front end and the rear end of the top of the storage plate 27. A top plate 29 is fixedly connected to the top of the support plates 28. A protection box 30 is provided on the top of the top plate 29. A limiting frame 31 is fixedly connected to the top of the protection box 30. Threaded holes 32 are provided in the middle of the tops of the connection seat 18, the fixing plate 26, the storage plate 27, the top plate 29 and the limiting frame 31, and the inner walls of the threaded holes 32 are threadedly connected to the outer wall of the valve rod 24; The inner wall of the protection box 30 is provided with a controller component 33, the top of the controller component 33 is provided with a through hole 34, and the inner wall of the through hole 34 is movably connected to the outer wall of the valve stem 24, and both sides of the bottom of the controller component 33 are embedded with laser distance measuring components 35, and the bottom of the laser distance measuring component 35 passes through the top of the top plate 29, and the controller component 33 is provided with a data collection component 36 inside, and the data collection component 36 is used to collect data sent by the water immersion sensor component 25 and the laser distance measuring component 35. The controller component 33 is provided with a communication component 37 inside, and the communication component 37 is electrically connected to the data collection component 36, and the communication component 37 is used to send the data collected by the data collection component 36 to the staff by wire or wirelessly; The outer wall of the valve stem 24 is fixedly connected with a limit disc 38, and a reflective ring 39 is embedded on the outer side of the top of the limit disc 38, and the reflective ring 39 is located below the laser distance measuring component 35; Furthermore, by setting the fixing plate 26, the storage plate 27, the support plate 28, the top plate 29 and the protective box 30 on the top of the connecting seat 18, not only a stable installation foundation is provided for the valve, but also it is tightly connected with the valve stem 24 through the threaded hole 32, ensuring the stable operation of the valve. The controller component 33 in the protective box 30 can monitor the position of the valve stem 24 and the limit disk 38 in real time through the laser ranging component 35 embedded in the bottom thereof, thereby realizing precise control of the degree of valve opening. The data collection component 36 inside the controller component 33 can efficiently collect data from the water immersion sensor component 25, and the communication component 37 is responsible for sending this data to the staff in real time, ensuring timely monitoring of the valve status. In addition, the design of the reflective ring 39 on the top of the limit disk 38 further enhances the ranging accuracy of the laser ranging component 35, thereby achieving the goal of improving the operating convenience, monitoring accuracy and intelligence level of the valve.

[0025] Example 5: Please refer to Figure 8 , an embodiment provided by the present invention: the working steps of the low-temperature resistant bellows stop valve for preventing the sealing valve seat from deforming are as follows: S1, rotating the rotating disk 40, driving the connecting block 23 and the valve core 10 to move upward through the valve stem 24, thereby opening the valve; S2, the rotating disk 40 is rotated in the reverse direction, and the connecting block 23 and the valve core 10 are driven to move downward through the valve stem 24, thereby closing the valve. During the movement of the valve core 10, the first hydraulic cylinder 11 and the second hydraulic cylinder 12 drive the first sealing ring 13, the second sealing ring 14, the second EPDM rubber sealing pad 15 and the first stainless steel bellows 16 to form a multi-layer sealing structure; S3, the water immersion sensor component 25 will continuously monitor the leakage inside the second bellows. Once a leakage is detected, the water immersion sensor component 25 will send a signal to alarm; S4. The laser ranging component 35 measures the position of the reflection ring 39 regularly or as needed, thereby indirectly monitoring the position and movement of the valve core 10; S5. The communication component 37 sends all the data collected by the data collection component 36 to the staff by wired or wireless means so that they can timely understand the operating state of the valve.

[0026] The following steps are further included in S2: S21. The first ethylene propylene rubber gasket 6 covering the inner wall of the top through groove 5 of the protective casting 3 and the sealing block 7 connected movably and the first ethylene propylene rubber sealing ring 8 fixed to its outer wall form a multi-layer sealing guarantee, and the second ethylene propylene rubber sealing ring 9 on the outer side of the bottom of the protective casting 3 further enhances the sealing performance.

[0027] Working principle: Through the settings of the valve body 1, the sealing valve seat 2, the mounting hole 4, and the protective casting 3, the first ethylene propylene rubber gasket 6 covering the inner wall of the through groove 5 at the top of the protective casting 3 and the sealing block 7 connected movably and the first ethylene propylene rubber sealing ring 8 fixed to its outer wall form a multi-layer sealing guarantee. The second ethylene propylene rubber sealing ring 9 on the outer side of the bottom of the protective casting 3 further enhances the sealing performance. The first hydraulic cylinder 11 and the second hydraulic cylinder 12 fitted at the bottom of the valve core 10 drive the first sealing ring 13, the second sealing ring 14, the second ethylene propylene rubber gasket 15, and the first stainless steel bellows 16 respectively to achieve the sealing effect. At the same time, the ethylene propylene rubber and stainless steel materials used are both low-temperature resistant materials. Thus, not only the low-temperature resistance and sealing performance of the valve are improved, but also the deformation of the sealing valve seat 2 is effectively prevented, ensuring the long-term stable operation of the valve. Through the setting of the multi-layer sealing structure formed by the mounting hole 4, the protective casting 3, the first ethylene propylene rubber gasket 6, the sealing block 7, and the first ethylene propylene rubber sealing ring 8, not only can the sealing performance of the valve be enhanced, but also the effect of dispersing pressure and stress can be achieved, reducing the pressure directly acting on the sealing valve seat 2, and thus reducing the risk of deformation of the sealing valve seat 2. By using low-temperature resistant alloys such as nickel-based alloys or titanium alloys to prepare the valve body 1, the sealing valve seat 2, the protective casting 3, and the valve core 10, the strength and toughness of the valve in a low-temperature environment are improved, ensuring its stable operation under extreme conditions. At the same time, the reinforcing plate 17 fixedly connected to the outer wall of the sealing valve seat 2 not only enhances the connection strength between the sealing valve seat 2 and the valve body 1, but also improves the overall structural stability of the valve, effectively preventing the deformation problem of the sealing valve seat 2 caused by temperature changes or pressure fluctuations. Thus, the globe valve can maintain excellent sealing performance and flexible flow control while having higher reliability and durability, and is suitable for various harsh industrial application environments. Through the settings of the valve cavity 19, the fixed disk 20, and the second stainless steel bellows 21, not only the connection stability between the valve core 10 and the valve body 1 is enhanced, but also through the elastic setting of the second stainless steel bellows 21, an additional deformation compensation ability is provided for the valve, helping to prevent sealing failure caused by pressure or temperature changes. Furthermore, through the water immersion sensor component 25 installed at the top of the valve core 10, whose position is inside the second stainless steel bellows 21, it can monitor in real time whether there is moisture intrusion inside the second stainless steel bellows 21, thus timely warning of potential leakage risks, which is beneficial to improving the sealing performance, operation convenience, and safety of the valve, ensuring the long-term stable operation of the valve under extreme conditions. Through the settings of the fixing plate 26, the placing plate 27, the supporting plate 28, the top plate 29, and the protective box 30 at the top of the connecting seat 18, not only a stable installation foundation is provided for the valve, but also it is tightly connected to the valve rod 24 through the threaded hole 32 opened, ensuring the stable operation of the valve. The controller component 33 in the protective box 30 can monitor the positions of the valve rod 24 and the limit disk 38 in real time through the laser ranging component 35 fitted at its bottom, achieving precise control of the opening degree of the valve.The data collection component 36 inside the controller component 33 can efficiently collect the data of the water immersion sensor component 25, while the communication component 37 is responsible for sending this data to the staff in real time, ensuring the timely monitoring of the valve state. In addition, the design of the reflection ring 39 on the top of the limit disc 38 further enhances the ranging accuracy of the laser ranging component 35, thereby improving the operation convenience, monitoring accuracy and intelligent level of the valve.

[0028] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A cryogenic-resistant bellows globe valve for preventing the deformation of a sealing valve seat, comprising a valve body (1), a sealing valve seat (2) and a protective casting (3), characterized in that: The inner wall of the valve body (1) is provided with a sealing valve seat (2), the top of the sealing valve seat (2) is provided with a mounting hole (4), and the interior of the mounting hole (4) is connected to a protective casting (3) via a thread; A through groove (5) is provided in the middle of the top of the protective casting (3), the inner wall of the through groove (5) is covered with a first EPDM rubber sealing pad (6), the inner wall of the first EPDM rubber sealing pad (6) is movably connected to a sealing block (7), the outer wall of the sealing block (7) is provided with a group of first EPDM rubber sealing rings (8), and the outer wall of the first EPDM rubber sealing ring (8) is movably connected to the inner wall of the first EPDM rubber sealing pad (6), and a second EPDM rubber sealing ring (9) is provided on the outer side of the bottom of the protective casting (3), and the bottom of the second EPDM rubber sealing ring (9) is movably connected to the outer wall of the sealing valve seat (2); The top of the sealing block (7) is fixedly connected to a valve core (10), and a plurality of first hydraulic cylinders (11) and a plurality of second hydraulic cylinders (12) are embedded on the outer side of the bottom of the valve core (10). The bottom of the first hydraulic cylinder (11) is fixedly connected to a first sealing ring (13), and the bottom of the second hydraulic cylinder (12) is fixedly connected to a second sealing ring (14), and the diameter of the first sealing ring (13) is smaller than the diameter of the second sealing ring (14). The bottoms of the first sealing ring (13) and the second sealing ring (14) are both fixedly connected to a second EPDM rubber gasket (15), and the tops of the first sealing ring (13) and the second sealing ring (14) are both fixedly connected to a first stainless steel bellows (16).

2. The cryogenic-resistant bellows globe valve for preventing the deformation of the sealing valve seat according to claim 1, wherein: The valve body (1), the sealing valve seat (2), the protective casting (3) and the valve core (10) are all made of a low-temperature resistant alloy, and the low-temperature resistant alloy used includes a nickel-based alloy or a titanium alloy.

3. The cryogenic-resistant bellows globe valve for preventing the deformation of a sealing valve seat according to claim 1, wherein: A plurality of reinforcing plates (17) are fixedly connected to the outer wall of the sealing valve seat (2), and the other end of the reinforcing plate (17) is fixedly connected to the inner wall of the valve body (1).

4. A cryogenic-resistant bellows globe valve for preventing deformation of a sealing valve seat, characterized in that: A connecting seat (18) is provided at the top of the valve body (1), a valve cavity (19) is provided inside the connecting seat (18), and the bottom of the valve cavity (19) is provided through the top of the valve body (1), a fixed disc (20) is fixedly connected to the inner wall of the valve cavity (19), a second stainless steel bellows (21) is fixedly connected to the outer side of the bottom of the fixed disc (20), and the other end of the second stainless steel bellows (21) is fixedly connected to the outer side of the top of the valve core (10).

5. A cryogenic-resistant bellows globe valve for preventing deformation of a sealing valve seat, characterized in that: A connecting groove (22) is provided in the middle of the top of the valve core (10); a connecting block (23) is movably connected to the inner wall of the connecting groove (22); a valve stem (24) is fixedly connected to the top of the connecting block (23); and the outer wall of the valve stem (24) is threadedly penetrated through the fixed disc (20); a water immersion sensor component (25) is provided on the top of the valve core (10); and the position of the water immersion sensor component (25) is located inside the second stainless steel bellows (21); and one end of the valve stem (24) is fixedly connected to a rotating disc (40).

6. A cryogenic-resistant bellows globe valve for preventing deformation of a sealing valve seat, characterized in that: The top of the connecting seat (18) is fixedly connected to a fixing plate (26), the top of the fixing plate (26) is connected to a storage plate (27) via bolts, the front end and the rear end of the top of the storage plate (27) are fixedly connected to a support plate (28), the top of the support plate (28) is fixedly connected to a top plate (29), a protection box (30) is arranged on the top of the top plate (29), the top of the protection box (30) is fixedly connected to a limiting frame (31), the middle of the top of the connecting seat (18), the fixing plate (26), the storage plate (27), the top plate (29) and the limiting frame (31) are all provided with a threaded hole (32), and the inner wall of the threaded hole (32) is threadedly connected to the outer wall of the valve stem (24).

7. A cryogenic-resistant bellows globe valve for preventing deformation of a sealing valve seat, characterized in that: The inner wall of the protection box (30) is provided with a controller component (33), the top of the controller component (33) is provided with a through hole (34), and the inner wall of the through hole (34) is movably connected to the outer wall of the valve stem (24), both sides of the bottom of the controller component (33) are embedded with laser distance measuring components (35), and the bottom of the laser distance measuring component (35) penetrates the top of the top plate (29), the controller component (33) is provided with a data collection component (36), the data collection component (36) is used to collect data sent by the water immersion sensor component (25) and the laser distance measuring component (35), the controller component (33) is provided with a communication component (37), and the communication component (37) is electrically connected to the data collection component (36), and the communication component (37) is used to send the data collected by the data collection component (36) to the staff in a wired or wireless manner.

8. A cryogenic-resistant bellows globe valve for preventing deformation of a sealing valve seat, characterized in that: The outer wall of the valve stem (24) is fixedly connected to a limiting disc (38), and a reflecting ring (39) is embedded on the outer side of the top of the limiting disc (38), and the reflecting ring (39) is located below the laser distance measuring component (35).

9. The usage method of a cryogenic-resistant bellows globe valve for preventing deformation of a sealing valve seat according to claim 8, characterized in that, The working steps of the low-temperature resistant bellows stop valve to prevent the deformation of the sealing valve seat are as follows: S1. Rotate the rotating disk (40) to drive the connecting block (23) and the valve core (10) to move upward via the valve stem (24), thereby opening the valve; S2, the rotating disk (40) is rotated in the opposite direction, and the connecting block (23) and the valve core (10) are driven to move downward through the valve stem (24), thereby closing the valve. During the movement of the valve core (10), the first hydraulic cylinder (11) and the second hydraulic cylinder (12) drive the first sealing ring (13), the second sealing ring (14), the second EPDM rubber sealing pad (15) and the first stainless steel bellows (16) to form a multi-layer sealing structure; S3, the water immersion sensor component (25) will continuously monitor the leakage inside the second bellows, and once a leakage is detected, the water immersion sensor component (25) will send a signal to alarm; S4. The laser distance measuring component (35) measures the position of the reflective ring (39) periodically or as needed, thereby indirectly monitoring the position and movement of the valve core (10).

10. The method of using a cryogenic-resistant bellows globe valve for preventing deformation of a sealing valve seat according to claim 9, characterized in that, The step S2 also includes the following steps: S21. The first ethylene-propylene rubber gasket (6) covering the inner wall of the top through groove (5) of the protective casting (3), the sealing block (7) connected movably, and the first ethylene-propylene rubber sealing ring (8) fixed to its outer wall form a multi-layer sealing guarantee, and the second ethylene-propylene rubber sealing ring (9) on the outer side of the bottom of the protective casting (3) further enhances the sealing performance.

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