Check valve for cryogenic environments

Abstract

The application relates to a check valve for a low-temperature environment, which comprises a valve body, a valve cover connected to the top of the valve body through a pressure-bearing bolt, a valve rod fixedly installed at the top of the valve cover, fixed plates fixedly installed at the left and right sides of the valve cover, a protective cover slidingly arranged outside the fixed plates, the protective cover being located at the periphery of the pressure-bearing bolt and the bottom of the protective cover being attached to the outer surface of the valve cover. The application can guide and limit the condensate water seepage in the ultra-low-temperature environment by means of the isolation baffle, reduces the possibility of the condensate water dropping to the surface of the pressure-bearing bolt, and can protect the pressure-bearing bolt by arranging the protective cover on the outer surface of the pressure-bearing bolt, reduces the possibility of the condensate water splashing to the surface of the pressure-bearing bolt during the dropping process, thereby solving the problems that the condensate water dropping can cause the pressure-bearing bolt to be corroded, the pressure-bearing bolt is affected by the containment force when being used for a long time, the valve cover is easily separated from the valve body, and a safety accident is caused.

Description

Technical Field

[0001] This application relates to the technical field of valves, and in particular to a check valve for use in cryogenic environments. Background Technology

[0002] A valve is a device used to control the flow of fluids (gas, liquid, steam, etc.). It changes the flow rate, pressure, or direction of the fluid by opening, closing, or adjusting the flow channel area. A check valve is an automatic valve used to prevent backflow of the medium in a pipeline and ensure unidirectional flow of the fluid. It is a control component in a fluid transport system and has functions such as shut-off, regulation, flow guidance, backflow prevention, pressure stabilization, flow diversion, or overflow pressure relief. The valve structure mainly includes: valve seat, valve cover, and valve stem. The valve cover and valve seat are mainly connected by pressure-bearing bolts, and the valve stem is threaded onto the valve cover. The valve seat can be opened and closed by turning the valve stem.

[0003] However, in some ultra-low temperature environments, due to environmental influences, condensate will precipitate in the gap between the valve stem and the valve cover. Simultaneously, the condensate will spread upwards and emerge from the top of the gap between the valve stem and the valve cover. As the usage time increases, the amount of condensate gradually increases until it drips. Since the pressure-bearing bolts connecting the valve cover and the valve seat are located below the dripping condensate, the dripping condensate will cause the bolts to corrode. With prolonged use, the bolt holding force will be affected, which can easily cause the valve cover to detach from the valve seat and cause a safety accident. Therefore, it is necessary to propose a check valve for low temperature environments to solve the above problems. Utility Model Content

[0004] To address the problem that in ultra-low temperature environments, condensate seeps out from the top of the gap between the valve stem and the valve cover, dripping onto the pressure bolts and causing corrosion, which, over time, weakens the bolt's holding force and can easily lead to the valve cover detaching from the valve seat, causing a safety accident, this application provides a check valve for cryogenic environments.

[0005] This application provides a check valve for use in low-temperature environments, employing the following technical solution: A check valve for cryogenic environments includes a valve body, a valve cover connected to the top of the valve body by a pressure-bearing bolt, a valve stem fixedly mounted on the top of the valve cover, and fixed plates fixedly mounted on both sides of the valve cover. A protective cover is slidably mounted on the outer side of the fixed plate, the protective cover is located outside the pressure-bearing bolt, and the bottom of the protective cover is in contact with the outer surface of the valve cover. A slider is fixedly mounted on the inner side of the protective cover, the slider is located inside the fixed plate, and a first spring is fixedly mounted inside the fixed plate, the bottom of the first spring being fixedly connected to the slider. A protective plate is provided on the outer side of the protective cover through an adjusting component, the adjusting component being used to adjust and limit the position of the protective plate; an isolation baffle is fixedly mounted on both sides of the valve cover, the isolation baffle being located on the top of the fixed plate.

[0006] By installing an isolation baffle, the leakage of condensate in ultra-low temperature environments can be guided and limited. The outer length of the isolation baffle extends to the outside of the pressure-bearing bolt, thus guiding the condensate to the outside of the bolt and reducing the possibility of condensate dripping onto its surface. However, as the condensate drips downwards, it may splash everywhere, potentially flowing down the outer wall of the valve cover and onto the pressure-bearing bolt surface. This application addresses this by installing a protective cover and a protective plate. By placing the protective cover on the outer surface of the pressure-bearing bolt, the bolt is waterproofed, reducing the risk of condensate dripping. This design eliminates the possibility of condensate splashing onto the surface of the pressure bolts during the process, thus solving the problem that condensate dripping can cause corrosion of the pressure bolts. Furthermore, over time, the reduced clamping force of the pressure bolts can easily lead to the valve cover detaching from the valve body, causing safety accidents. Through the cooperation between the fixing plate and its internal structure, the pressure bolts can be exposed by pushing the protective cover upwards, facilitating disassembly and assembly. This makes it easier to install, remove, and maintain the valve cover and valve body. After the pressure bolts are installed, the first spring's own elasticity compresses the slider downwards, ensuring a tight fit between the protective cover and the valve cover surface, thus protecting the pressure bolts.

[0007] A further improvement of the technical solution of this application is that: the adjusting component includes a fixing block, the fixing block is fixedly connected to the outside of the protective cover, and a sliding groove is opened inside the protective plate, and the fixing block is slidably connected to the inside of the sliding groove; Inside the protective cover, a connecting plate is slidably installed via a second spring. A sliding rod is fixedly installed on the top of the connecting plate inside the second spring. A rotating plate is provided on the top of the protective cover. The top of the sliding rod passes through the interior of the rotating plate and is fixedly installed with a top plate. A limiting plate is fixedly installed on the outside of the rotating plate. The limiting plate is in contact with the top of the protective plate. A pair of blocking blocks are fixedly installed on the top of the protective cover. The blocking blocks are in contact with the front and rear sides of the limiting plate.

[0008] The above technical solution involves adjusting the cooperation between components. A fixed block and a sliding groove are used, with the sliding groove sliding along the outer surface of the fixed block to connect the protective plate to the protective cover. This guides and limits the sliding trajectory of the protective plate. Pushing the protective plate upwards exposes the outer side of the protective cover, increasing the opening size and facilitating the installation and removal of the pressure bolts. The second spring's elastic force on the connecting plate causes the top plate to press and limit the rotating plate. Simultaneously, blocking blocks limit the limiting plate from both the front and rear sides, causing it to engage with the top of the protective plate, thus protecting the periphery of the pressure bolts. Pulling the limiting plate upwards separates it from the blocking block, and then rotating it horizontally moves it away from the top of the protective plate, facilitating vertical movement of the protective plate.

[0009] A further improvement to the technical solution of this application is that a sealing strip is inserted into the top of the protective cover at the bottom of the limiting plate, and the sealing strip is tightly fitted to the upper surface of the protective plate.

[0010] By adopting the above technical solution, the gap between the protective cover and the protective plate can be sealed by setting a sealing strip, which reduces the possibility of condensate entering the surface of the pressure bolt through the gap.

[0011] A further improvement of the technical solution of this application is that: the inner surface of the sealing strip is provided with a plurality of first protrusions, and the first protrusions are in close contact with the surface of the protective cover.

[0012] By adopting the above technical solution, the inner surface of the sealing strip can be changed from a flat surface to an arc surface by setting the first convex strip, thereby increasing the contact area between the sealing strip and the protective cover, further improving the sealing effect, and further reducing the possibility of condensate water penetrating into the surface of the pressure bolt through the gap.

[0013] A further improvement of the technical solution of this application is that: a plurality of second protrusions are provided on the outer surface of the sealing strip, and the second protrusions are in close contact with the surface of the protective plate.

[0014] By adopting the above technical solution, the outer surface of the sealing strip can be changed from a flat surface to an arc surface by setting a second convex strip, thereby increasing the contact area between the sealing strip and the protective plate, further improving the sealing effect, and further reducing the possibility of condensate entering the surface of the pressure bolt through the gap.

[0015] A further improvement of the technical solution of this application is that guide blocks are fixedly installed on both the front and rear sides of the slider, and the guide blocks are slidably connected to the inside of the fixed plate.

[0016] The above technical solution guides and limits the sliding trajectory of the slider inside the fixed plate by setting a guide block, preventing the slider from detaching from the inside of the fixed plate during sliding and ensuring that the protective cover can maintain linear movement.

[0017] A further improvement to the technical solution of this application is that side plates are fixedly installed on both the front and rear sides of the isolation baffle.

[0018] By adopting the above technical solution, the isolation baffle can be raised from both the front and rear sides by installing side plates, which reduces the possibility of condensate seeping out from both the front and rear sides after flowing to the surface of the isolation baffle, and ensures that the condensate can be guided out to the left and right sides.

[0019] In summary, this application includes at least one of the following beneficial technical effects: 1. This application provides a check valve for cryogenic environments. By installing an isolation baffle, it can guide and limit the leakage of condensate in ultra-low temperature environments, reducing the possibility of condensate dripping onto the surface of the pressure bolt. Furthermore, by setting a protective cover and a protective plate, the pressure bolt can be waterproofed, reducing the possibility of condensate splashing onto the surface of the pressure bolt during dripping. This solves the problem that condensate may splash everywhere during downward dripping, thus easily flowing down the outer wall of the valve cover and potentially flowing onto the surface of the pressure bolt. This solves the problem that condensate dripping can cause corrosion of the pressure bolt, and with prolonged use, the clamping force of the pressure bolt may be affected, easily causing the valve cover to detach from the valve body and leading to safety accidents.

[0020] 2. This application provides a check valve for low-temperature environments. By setting an adjustment component, the position of the protective plate outside the protective cover can be guided and limited. By pushing the protective plate to the top, the outer side of the protective cover is exposed, thereby increasing the size of the opening in the protective cover and further facilitating the installation and removal of the pressure-bearing bolts.

[0021] 3. This application provides a check valve for low-temperature environments. By setting a sealing strip, the gap between the protective cover and the protective plate can be sealed. Furthermore, by setting a first convex strip and a second convex strip, the two sides of the sealing strip can be changed from flat surfaces to arc surfaces, thereby increasing the contact area between the sealing strip and the protective cover and the protective plate, improving the sealing effect, and further reducing the possibility of condensate entering the surface of the pressure bolt through the gap. Attached Figure Description

[0022] Figure 1 This is a perspective view of this application; Figure 2 This is a partial structural diagram of the bearing bolt of this application; Figure 3 This is a partial structural schematic diagram of the cross-section of the fixing plate in this application; Figure 4 This is a partial cross-sectional structural diagram of the protective cover of this application; Figure 5 This is a schematic diagram of the partially exploded cross-section of the protective shield in this application; Figure 6 This application is Figure 4 Enlarged structural diagram at point A in the middle.

[0023] Explanation of reference numerals in the attached drawings: 1. Valve body; 2. Valve cover; 3. Valve stem; 4. Protective cover; 5. Fixing plate; 6. Protective plate; 7. Isolation baffle; 8. Side plate; 9. First spring; 10. Bearing bolt; 11. Sliding block; 12. Guide block; 13. Fixing block; 14. Slide groove; 15. Blocking block; 16. Sealing strip; 17. First protrusion; 18. Second protrusion; 19. Limiting plate; 20. Rotating plate; 21. Slide rod; 22. Top plate; 23. Second spring; 24. Connecting plate. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0025] Example 1 See Figure 1 , Figure 2 and Figure 3 This application provides a check valve for cryogenic environments, comprising a valve body 1, a valve cover 2 connected to the top of the valve body 1 by a pressure-bearing bolt 10, a valve stem 3 fixedly mounted on the top of the valve cover 2, and fixed plates 5 fixedly mounted on both the left and right sides of the valve cover 2. A protective cover 4 is slidably disposed on the outer side of the fixed plate 5, the protective cover 4 is located around the pressure-bearing bolt 10, and the bottom of the protective cover 4 is in contact with the outer surface of the valve cover 2. A slider 11 is fixedly mounted on the inner side of the protective cover 4, the slider 11 is located inside the fixed plate 5, a first spring 9 is fixedly mounted inside the fixed plate 5, and the bottom of the first spring 9 is fixedly connected to the slider 11. A protective plate 6 is disposed on the outer side of the protective cover 4 by an adjusting component, the adjusting component being used to adjust and limit the position of the protective plate 6; and an isolation baffle 7 is fixedly mounted on both the left and right sides of the valve cover 2, the isolation baffle 7 being located on the top of the fixed plate 5.

[0026] In this embodiment, the installation of the isolation baffle 7 can guide and limit the leakage of condensate in the ultra-low temperature environment. The outer length of the isolation baffle 7 extends to the outer side of the pressure bolt 10, thus guiding the condensate to the outer side of the pressure bolt 10, thereby reducing the possibility of condensate dripping onto the surface of the pressure bolt 10. However, as the condensate drips downwards, there is a possibility of splashing everywhere, which can easily flow downwards along the outer wall of the valve cover 2, and thus there is a possibility of it flowing onto the surface of the pressure bolt 10. In this application, by setting the protective cover 4 and the protective plate 6, and by placing the protective cover 4 on the outer surface of the pressure bolt 10, the pressure bolt 10 can be waterproofed by the protective cover 4, reducing the leakage of condensate during dripping. This design eliminates the possibility of water splashing onto the surface of the pressure bolt 10 during the process, thus solving the problem that condensate dripping can cause corrosion of the pressure bolt 10. Furthermore, over time, the clamping force of the pressure bolt 10 may be affected, easily leading to the valve cover 2 detaching from the valve body 1 and causing a safety accident. Through the cooperation between the fixing plate 5 and its internal structure, the pressure bolt 10 can be exposed by pushing the protective cover 4 upwards, facilitating the disassembly and assembly of the pressure bolt 10. This makes it easier to install, disassemble, and maintain the valve cover 2 and valve body 1. Using the elastic force of the first spring 9, after the pressure bolt 10 is installed, the first spring 9 presses the slider 11 downwards, causing the protective cover 4 to fit tightly against the surface of the valve cover 2, thus protecting the pressure bolt 10.

[0027] Example 2 See Figure 3 , Figure 4 , Figure 5 and Figure 6 Based on Embodiment 1, this application provides a technical solution: Preferably, the adjusting component includes a fixing block 13, which is fixedly connected to the outer side of the protective cover 4. A sliding groove 14 is provided inside the protective plate 6, and the fixing block 13 is slidably connected to the inside of the sliding groove 14. A connecting plate 24 is slidably installed inside the protective cover 4 through a second spring 23. A sliding rod 21 is fixedly installed on the top of the connecting plate 24 inside the second spring 23. A rotating plate 20 is provided on the top of the protective cover 4. The top of the sliding rod 21 passes through the interior of the rotating plate 20 and is fixedly installed with a top plate 22. A limiting plate 19 is fixedly installed on the outer side of the rotating plate 20. The limiting plate 19 is in contact with the top of the protective plate 6. A pair of blocking blocks 15 are fixedly installed on the top of the protective cover 4. The blocking blocks 15 are in contact with both the front and rear sides of the limiting plate 19. A sealing strip 16 is inserted into the top of the protective cover 4 at the bottom of the limiting plate 19. The sealing strip 16 is tightly attached to the upper surface of the protective plate 6. A plurality of first protrusions 17 are provided on the inner surface of the sealing strip 16. The first protrusions 17 are tightly attached to the surface of the protective cover 4. A plurality of second protrusions 18 are provided on the outer surface of the sealing strip 16. The second protrusions 18 are tightly attached to the surface of the protective plate 6.

[0028] In this embodiment, by adjusting the cooperation between the components, wherein a fixing block 13 and a sliding groove 14 are provided, the sliding groove 14 slides along the outer surface of the fixing block 13, which can connect the protective plate 6 to the protective cover 4, and can guide and limit the sliding trajectory of the protective plate 6. By pushing the protective plate 6 to the top, the outer side of the protective cover 4 is exposed, thereby increasing the size of the opening in the protective cover 4, further facilitating the installation and removal of the pressure bolt 10, and the second spring 23 springs the connecting plate 24. The force causes the top plate 22 to press and limit the rotating plate 20, while the blocking block 15 limits the limiting plate 19 from the front and rear sides, so that the limiting plate 19 is engaged with the top of the protective plate 6, which can limit the protective plate 6 and thus protect the periphery of the bearing bolt 10. By pulling the limiting plate 19 to the top, the limiting plate 19 is separated from the blocking block 15, and then the limiting plate 19 is rotated horizontally to move the limiting plate 19 away from the top of the protective plate 6, thus facilitating the up and down movement of the protective plate 6. By setting the sealing strip 16, the gap between the protective cover 4 and the protective plate 6 can be sealed, reducing the possibility of condensate entering the surface of the bearing bolt 10 through the gap. Furthermore, by setting the first protrusion 17 and the second protrusion 18, the two sides of the sealing strip 16 can be changed from flat surfaces to curved surfaces, thereby increasing the contact area between the sealing strip 16 and the protective cover 4 and the protective plate 6, further improving the sealing effect, and further reducing the possibility of condensate entering the surface of the bearing bolt 10 through the gap.

[0029] Example 3 See Figure 1 and Figure 3 Based on Embodiment 2, this application provides a technical solution: preferably, guide blocks 12 are fixedly installed on both the front and rear sides of the slider 11, and the guide blocks 12 are slidably connected to the interior of the fixed plate 5; side plates 8 are fixedly installed on both the front and rear sides of the isolation baffle 7.

[0030] In this embodiment, by setting the guide block 12, the sliding trajectory of the slider 11 inside the fixed plate 5 can be guided and limited, preventing the slider 11 from detaching from the interior of the fixed plate 5 during the sliding process, and ensuring that the protective cover 4 can maintain linear movement; by installing the side plate 8, the isolation baffle 7 can be raised from the front and rear sides, reducing the possibility of condensate seeping out from the front and rear sides after flowing to the surface of the isolation baffle 7, and ensuring that the condensate can be guided out to the left and right sides.

[0031] The working principle of this fully automatic multi-axis winding machine is explained in detail below.

[0032] like Figures 1-6As shown, the operator can pull the limiting plate 19 upwards to separate it from the blocking block 15, then rotate the limiting plate 19 horizontally to move it away from the top of the protective plate 6, then push the protective plate 6 upwards while simultaneously pushing the protective cover 4 upwards to facilitate the installation and removal of the pressure bolt 10. After processing, the operator can release the protective cover 4, and the first spring 9 can press the slider 11 downwards, causing the protective cover 4 to slide and fit tightly against the surface of the valve cover 2. Then, push the protective plate 6 downwards, pull the limiting plate 19 upwards, and rotate the limiting plate 19 horizontally to move it to the top of the protective plate 6 and engage it between the two blocking blocks 15 to limit the protective plate 6, thereby enabling it to cooperate with the isolation baffle 7 to provide waterproof protection for the pressure bolt 10 from the outside.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A check valve for use in cryogenic environments, comprising a valve body (1), characterized in that: The valve body (1) is connected to the top of the valve cover (2) by a pressure bolt (10). The valve cover (2) is fixedly installed with a valve stem (3). The valve cover (2) is fixedly installed with a fixing plate (5) on both the left and right sides. A protective cover (4) is slidably provided on the outside of the fixing plate (5). The protective cover (4) is located outside the pressure bolt (10), and the bottom of the protective cover (4) is in contact with the outer surface of the valve cover (2). A slider (11) is fixedly installed on the inside of the protective cover (4). The slider (11) is located inside the fixing plate (5). A first spring (9) is fixedly installed inside the fixing plate (5). The bottom of the first spring (9) is fixedly connected to the slider (11). A protective plate (6) is provided on the outside of the protective cover (4) through an adjustment component. The adjustment component is used to adjust and limit the position of the protective plate (6). Isolation baffles (7) are fixedly installed on both the left and right sides of the valve cover (2), and the isolation baffles (7) are located on the top of the fixed plate (5).

2. A check valve for low-temperature environments according to claim 1, characterized in that: The adjusting component includes a fixing block (13), which is fixedly connected to the outside of the protective cover (4). The protective plate (6) has a sliding groove (14) inside, and the fixing block (13) is slidably connected to the inside of the sliding groove (14). Inside the protective cover (4), a connecting plate (24) is slidably installed via a second spring (23). A sliding rod (21) is fixedly installed on the top of the connecting plate (24) inside the second spring (23). A rotating plate (20) is provided on the top of the protective cover (4). The top of the sliding rod (21) passes through the interior of the rotating plate (20) and is fixedly installed with a top plate (22). A limiting plate (19) is fixedly installed on the outer side of the rotating plate (20). The limiting plate (19) is in contact with the top of the protective plate (6). A pair of blocking blocks (15) are fixedly installed on the top of the protective cover (4). The blocking blocks (15) are in contact with both the front and rear sides of the limiting plate (19).

3. A check valve for low-temperature environments according to claim 2, characterized in that: A sealing strip (16) is inserted into the top of the protective cover (4) at the bottom of the limiting plate (19), and the sealing strip (16) is in close contact with the upper surface of the protective plate (6).

4. A check valve for low-temperature environments according to claim 3, characterized in that: The inner surface of the sealing strip (16) is provided with a plurality of first protrusions (17), and the first protrusions (17) are in close contact with the surface of the protective cover (4).

5. A check valve for low-temperature environments according to claim 4, characterized in that: The outer surface of the sealing strip (16) is provided with a plurality of second protrusions (18), and the second protrusions (18) are in close contact with the surface of the protective plate (6).

6. A check valve for cryogenic environments according to claim 1, characterized in that: Guide blocks (12) are fixedly installed on both the front and rear sides of the slider (11), and the guide blocks (12) are slidably connected to the interior of the fixed plate (5).

7. A check valve for cryogenic environments according to claim 1, characterized in that: Side plates (8) are fixedly installed on both the front and rear sides of the isolation baffle (7).

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