Leak-proof double-gate airlock wear-resistant valve
By designing dustproof box and wear-resistant plate in the air lock valve, combined with the structure of a compensation spring and a fixed-angle block, the problem of extrusion of materials on the dustproof ring when the piston rod is retracted is solved, and higher wear resistance and sealing performance are achieved.
Patent Information
- Application Number
- CN202510521916.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-24
- Publication Date
- 2025-06-06
AI Technical Summary
During the retraction of the piston rod of the existing air lock valve, the material squeezes the dust ring, causing the dust ring to wear, and dust will appear at the sliding fit between the piston rod and the valve body.
An anti-leakage double-lock air lock wear-resistant valve is designed, using an internal hollow dustproof box and wear-resistant plate. By compensating for the action of the pressure spring, the wear-resistant plate is always close to the outer wall of the piston rod, and is used to scrape away the materials attached to the piston rod with a fixed angle block to avoid the material from squeezing the dustproof ring.
It effectively avoids the extrusion and wear of the dust ring by materials, reduces the ash phenomenon at the sliding fit between the piston rod and the valve body, and improves the wear resistance and sealing performance of the valve.
Smart Images
Figure CN120100947A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of valve airtightness technology, and in particular to a leak-proof double-gate air-lock wear-resistant valve. Background Art
[0002] The gas lock valve is an instrument auxiliary device. Its main function is to cut off the valve control channel when the compressed gas source fails and stops supplying gas, so that the valve position remains in the state before the gas is cut off. This design can ensure the normal progress of the process. The gas lock valve will not open the channel and restore normal control until the accident in the system is eliminated and gas is supplied again.
[0003] The related technology discloses an air lock valve, comprising a valve body and a valve core arranged in the valve body. A telescopic cylinder electrically connected to a control system is arranged outside the valve body. The piston rod of the telescopic cylinder extends into the valve body and is connected to the valve core. The opening and closing of the air lock valve is achieved by the telescopic movement of the piston rod. A dust ring is arranged at the sliding fit between the piston rod and the valve body.
[0004] Since the working conditions of conveying materials may be different, some materials will adhere to the piston rod. During the process of piston rod retraction and restoration, the material will squeeze the dust ring. After a long time, the dust ring will wear, causing dust to appear at the sliding fit between the piston rod and the valve body, which is an obvious deficiency. Summary of the invention
[0005] In order to improve the problem of dust emission at the sliding fit between the piston rod and the valve body, the present application provides a leak-proof double-gate air-lock wear-resistant valve.
[0006] The present application provides a leak-proof double-gate air-lock wear-resistant valve adopts the following technical solution: A leak-proof double-gate air-lock wear-resistant valve comprises an internally hollow valve body and a telescopic cylinder arranged outside the valve body, the piston rod of the telescopic cylinder slides into the valve body, an internally hollow dust box is placed in the valve body, the dust box comprises a box body with openings on two opposite sides and side covers detachably connected to the openings of the box body, the piston rod slides through the two side covers, four fixed right-angle blocks tightly attached to the piston rod are arranged in the dust box in the circumferential direction relative to the piston rod, a wear-resistant abutment plate tightly attached to the circumferential outer wall of the piston rod is slidably arranged between two circumferentially adjacent fixed right-angle blocks, and a compensating compression spring is supported between the wear-resistant abutment plate and the inner wall of the dust box.
[0007] By adopting the above technical solution, under the action of the compensating compression spring, the wear-resistant butt plate is always in close contact, and the wear-resistant butt plate and the fixed right-angle block circumferentially cover the piston rod of the telescopic cylinder. During the telescopic movement of the piston rod, the wear-resistant butt plate and the fixed right-angle block cooperate to scrape off the material attached to the piston rod, thereby avoiding the possibility of the material squeezing the dust ring and causing it to be damaged.
[0008] Optionally, a partition is arranged in the box body, the piston rod slides through the partition, and a group of wear-resistant abutment plates and fixed right-angle blocks are arranged on opposite sides of the partition, and the two groups of wear-resistant abutment plates and fixed right-angle blocks are circumferentially staggered.
[0009] By adopting the above technical solution, the two sets of wear-resistant abutment plates and the fixed right-angle blocks cooperate to improve the scraping effect of the material attached to the piston rod.
[0010] Optionally, the partition extends to be in close contact with the inner wall of the valve body, and pre-support components are arranged on both sides of the partition relative to the axial direction of the piston rod, and the pre-support components include four support plates distributed in a rectangular shape, and two hinge plates are hinged at both ends of the support plate, and two hinge plates between two circumferentially adjacent support plates are hinged to each other, the compensating compression spring is supported on the support plate, and the side cover is provided with a tightening member for pressing the support plate against the outer wall of the box body.
[0011] By adopting the above technical solution, during installation, the worker first passes the piston rod through the dustproof box. During this process, the wear-resistant plate is located outside the range of the piston rod, which makes installation easier. After that, the worker manually presses the support plate close to the outer wall of the support plate, and the support plate squeezes the compensating compression spring into the box body. Only then does the compensating compression spring push the wear-resistant plate to press against the outer wall of the piston rod. After it is pressed in place, the tightening piece limits the position of the support plate, reducing the possibility that the wear-resistant plate is too close to the center of the box body in advance, resulting in the piston rod being installed unchanged.
[0012] Optionally, deformation grooves are provided at the four top corners of the side plate relative to the radial direction of the piston rod, the abutment member includes a barb strip located on the side of the side plate facing the partition and located on its edge, and the support plate is located between the outer wall of the box body and the barb strip.
[0013] By adopting the above technical solution, when a worker manually presses the support plate close to the outer wall of the box body, the support plate squeezes the edge of the side plate. Due to the presence of the deformation groove, the side plate near the edge is bent and deformed, so that the support plate can be tightly attached to the outer wall of the shell. At this time, the barb strip can hook the support plate, so that the support plate remains in a close contact with the outer wall of the shell.
[0014] Optionally, an elastic sealing gasket is sandwiched between the support plate and the outer side wall of the box body.
[0015] By adopting the above technical solution, when the support plate is pressed against the outer wall of the box body, the support plate and the outer wall of the box body cooperate to squeeze the elastic sealing gasket, thereby improving the sealing performance between the support plate and the outer wall of the box body.
[0016] Optionally, the dustproof box, the wear-resistant abutment plate and the fixed right-angle block are all made of PTFE material.
[0017] By adopting the above technical solution, the PTFE material has strong stability and can adapt to acidic and alkaline working environments. In addition, its surface is smooth, and when used in the valve body, the material is not easy to adhere to the PTFE material.
[0018] Optionally, the side cover is bolted to the box body.
[0019] By adopting the above technical solution, workers can easily separate the side cover from the box body, thereby facilitating the replacement of the worn wear-resistant plate.
[0020] In summary, the present application includes at least one of the following beneficial technical effects: 1. Under the action of the compensating compression spring, the wear-resistant plate is always in close contact with the piston rod of the telescopic cylinder. The wear-resistant plate and the fixed right-angle block cover the piston rod of the telescopic cylinder circumferentially. During the telescopic movement of the piston rod, the wear-resistant plate and the fixed right-angle block cooperate to scrape off the material attached to the piston rod, thereby avoiding the possibility of the dust ring being squeezed by the material and thus damaged; 2. During installation, the worker first passes the piston rod through the dustproof box. During this process, the wear-resistant plate is located outside the range of the piston rod, which makes installation easier. After that, the worker manually presses the support plate close to the outer wall of the support plate, and the support plate squeezes the compensating spring into the box body. The compensating spring then pushes the wear-resistant plate against the outer wall of the piston rod. After it is in place, the support piece limits the position of the support plate, reducing the possibility that the wear-resistant plate is too close to the center of the box body in advance, resulting in the piston rod being installed unchanged; 3. When the worker manually presses the support plate close to the outer wall of the box body, the support plate squeezes the edge of the side plate. Due to the existence of the deformation groove, the side plate near the edge is bent and deformed, so that the support plate can be close to the outer wall of the shell. At this time, the barb strip can hook the support plate, so that the support plate remains in close contact with the outer wall of the shell. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a cross-sectional view of an embodiment of the present application.
[0022] Figure 2 It is an exploded view of the positional relationship between the box body, the support plate and the side plates in the embodiment of the present application.
[0023] Figure 3 It is a cross-sectional view showing the positional relationship between the barb strip, the elastic sealing pad and the box body in the embodiment of the present application.
[0024] Explanation of the reference numerals in the accompanying drawings: 1. valve body; 2. telescopic cylinder; 3. piston rod; 41. box body; 42. side cover; 421. deformation groove; 5. fixed right-angle block; 6. wear-resistant abutment plate; 7. compensation compression spring; 8. partition; 9. support plate; 10. hinge plate; 11. barb strip; 12. elastic sealing gasket. DETAILED DESCRIPTION
[0025] The following is combined with Figure 1-3 This application is described in further detail.
[0026] The embodiment of the present application discloses a leak-proof double-gate air-lock wear-resistant valve.
[0027] Reference Figure 1 The anti-leakage double-gate air-lock wear-resistant valve comprises a valve body 1 with a hollow interior, a telescopic cylinder 2 bolted to the outside of the valve body 1, and a piston rod 3 of the telescopic cylinder 2 slidingly penetrates into the valve body 1.
[0028] Reference Figure 1 and Figure 2 A hollow dust box is placed inside the valve body 1 , and the dust box includes a box body 41 with openings on two opposite sides, and a side cover 42 bolted to the opening of the box body 41 , and the piston rod 3 slides through the two side covers 42 .
[0029] Reference Figure 1 and Figure 2 A partition plate 8 is integrally formed in the box body 41 , and the piston rod 3 slides through the partition plate 8 . The partition plate 8 extends outside the box body 41 and is used to be in close contact with the inner wall of the valve body 1 .
[0030] Reference Figure 1 and Figure 2 A set of scraper assemblies are arranged on both sides of the box body 41 relative to the partition 8, and the scraper assemblies include four fixed right-angle blocks 5. The four fixed right-angle blocks 5 are evenly distributed circumferentially relative to the piston rod 3, and the right-angle edges of the fixed right-angle blocks 5 are in close contact with the outer circumferential wall of the piston rod 3.
[0031] Reference Figure 1 and Figure 2 A wear-resistant plate 6 is tightly and slidably fitted between two circumferentially adjacent fixed right-angle blocks 5. The wear-resistant plate 6 is arc-shaped and is used to press against the circumferential outer wall of the piston rod 3. The wear-resistant plate 6 moves radially along the piston rod 3. The wear-resistant plates 6 and the fixed right-angle blocks 5 of the two groups of scraper assemblies are circumferentially staggered.
[0032] The side plate, the box body 41, the wear-resistant plate 6 and the fixed right-angle block 5 are all made of PTFE material. On the one hand, the PTFE material has strong stability and can adapt to acidic and alkaline working environments. On the other hand, the surface of the PTFE material is smooth, and when it is used in the valve body 1, the material is not easy to adhere to the PTFE material.
[0033] Reference Figure 1 and Figure 2 A group of pre-support components are arranged at the positions outside the box body 41 on the opposite sides of the partition 8, and one group of pre-support components corresponds to one scraper component.
[0034] Reference Figure 1The pre-support assembly includes four rectangular support plates 9, two hinge plates 10 are hinged at both ends of the support plates 9, and the two hinge plates 10 between two circumferentially adjacent support plates 9 are hinged to each other.
[0035] Reference Figure 1 and Figure 2 One end of the compensating compression spring 7 is connected to the corresponding wear-resistant abutment plate 6 , and the other end passes through the side wall of the box body 41 and is connected to the corresponding support plate 9 .
[0036] Reference Figure 2 and Figure 3 The four top corners of the side plate are all provided with deformation grooves 421 in the radial direction of the piston rod 3, and the side cover 42 is provided with a fastening member for fastening the support plate 9 to the outer wall of the box body 41. The fastening member includes a barb strip 11 integrally formed on the side of the side plate facing the partition plate 8 and located at the edge thereof, and the support plate 9 is located between the outer wall of the box body 41 and the barb strip 11.
[0037] Reference Figure 2 and Figure 3 During assembly, the worker first passes the piston rod 3 of the telescopic cylinder 2 through the dustproof box. During this process, there is a gap between the wear-resistant plate 6 and the piston rod 3.
[0038] Afterwards, the worker manually presses the four support plates 9, and the support plates 9 are close to the outer wall of the box body 41. Due to the existence of the deformation groove 421, the position of the side plate close to the edge is deformed by the support plates 9. After the support plates 9 pass over the hook strips 11, the hook strips 11 hook the support plates 9, and at this time the support plates 9 are close to the outer wall of the shell.
[0039] The support plate 9 pushes the wear-resistant butt plate 6 to approach and press against the outer wall of the piston rod 3 through the compensating compression spring 7. The wear-resistant butt plate 6 cooperates with the fixed right-angle block 5 to achieve circumferentially uninterrupted enclosure of the piston rod 3. When the piston rod 3 makes a telescopic movement, it can scrape off the material attached to the piston rod 3, reducing the possibility of the material squeezing the dust ring and causing it to be damaged.
[0040] Reference Figure 2 and Figure 3 When the valve is used for a long time, the wear-resistant plate 6 will inevitably wear out, so the worker can remove the valve body 1 from the box body 41 and separate the side plate from the box body 41, and then the wear-resistant plate 6 can be replaced.
[0041] Reference Figure 2 and Figure 3 An elastic sealing pad 12 is sandwiched between the support plate 9 and the outer wall of the box body 41, and the elastic sealing pad 12 is bonded to the outer wall of the box body 41. The support plate 9 and the outer wall of the box body 41 cooperate to squeeze the elastic sealing pad 12, thereby improving the sealing performance between the support plate 9 and the outer wall of the box body 41.
[0042] The implementation principle of the leakage-proof double-gate air-lock wear-resistant valve in the embodiment of the present application is: during assembly, the worker first passes the piston rod 3 of the telescopic cylinder 2 through the dustproof box. During this process, there is a distance between the wear-resistant abutment plate 6 and the piston rod 3.
[0043] Afterwards, the worker manually presses the four support plates 9, and the support plates 9 are close to the outer wall of the box body 41. Due to the existence of the deformation groove 421, the position of the side plate close to the edge is deformed by the support plates 9. After the support plates 9 pass over the hook strips 11, the hook strips 11 hook the support plates 9, and at this time the support plates 9 are close to the outer wall of the shell.
[0044] The support plate 9 pushes the wear-resistant butt plate 6 to approach and press against the outer wall of the piston rod 3 through the compensating compression spring 7. The wear-resistant butt plate 6 cooperates with the fixed right-angle block 5 to achieve circumferentially uninterrupted enclosure of the piston rod 3. When the piston rod 3 makes a telescopic movement, it can scrape off the material attached to the piston rod 3, reducing the possibility of the material squeezing the dust ring and causing it to be damaged.
[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A leak-proof double-gate air-lock wear-resistant valve, comprising a valve body (1) with a hollow interior and a telescopic cylinder (2) arranged outside the valve body (1), wherein a piston rod (3) of the telescopic cylinder (2) slides into the valve body (1), and is characterized in that: An internally hollow dust box is placed in the valve body (1), and the dust box includes a box body (41) with openings on two opposite sides and a side cover (42) detachably connected to the opening of the box body (41). The piston rod (3) slides through the two side covers (42). Four fixed right-angle blocks (5) are arranged circumferentially relative to the piston rod (3) in the dust box and are tightly attached to the piston rod (3). A wear-resistant plate (6) is tightly and slidably arranged between two circumferentially adjacent fixed right-angle blocks (5) and is pressed against the circumferential outer wall of the piston rod (3). A compensating compression spring (7) is supported between the wear-resistant plate (6) and the inner wall of the dust box.
2. The anti-leakage double-gate air-lock wear-resistant valve according to claim 1 is characterized in that: A partition (8) is arranged in the box body (41), and the piston rod (3) slides through the partition (8). A group of wear-resistant abutment plates (6) and fixed right-angle blocks (5) are arranged on opposite sides of the partition (8), and the two groups of wear-resistant abutment plates (6) and fixed right-angle blocks (5) are circumferentially staggered.
3. The anti-leakage double-gate air-lock wear-resistant valve according to claim 2 is characterized in that: The partition (8) extends to be in close contact with the inner wall of the valve body (1), and pre-support components are arranged on both sides of the partition (8) relative to the axial direction of the piston rod (3), and the pre-support components include four support plates (9) distributed in a rectangular shape, and two hinge plates (10) are respectively hinged at both ends of the support plate (9), and the two hinge plates (10) between two circumferentially adjacent support plates (9) are hinged to each other, and the compensating compression spring (7) is supported on the support plate (9), and a tightening member for pressing the support plate (9) against the outer wall of the box body (41) is arranged on the side cover (42).
4. The anti-leakage double-gate air-lock wear-resistant valve according to claim 3 is characterized in that: The four top corners of the side plate are all provided with deformation grooves (421) in the radial direction relative to the piston rod (3), the abutting member comprises a barb strip (11) located on the side of the side plate facing the partition plate (8) and located on its edge, and the support plate (9) is located between the outer wall of the box body (41) and the barb strip (11).
5. The anti-leakage double-gate air-lock wear-resistant valve according to claim 4 is characterized in that: An elastic sealing pad (12) is sandwiched between the support plate (9) and the outer side wall of the box body (41).
6. The anti-leakage double-gate air-lock wear-resistant valve according to claim 1, characterized in that: The dustproof box, the wear-resistant abutment plate (6) and the fixed right-angle block (5) are all made of PTFE material.
7. The anti-leakage double-gate air-lock wear-resistant valve according to claim 1 is characterized in that: The side cover (42) is bolted to the box body (41).