Linkage brake type dustproof and waterproof double-layer sealing mechanism
Through the linkage gate-type dust-proof and waterproof double-layer sealing mechanism, the use of oil chamber lubricating oil and deformation plate design solves the problems of gate valve stem rust and gate plate wear, and achieves a dust-proof and waterproof double-layer sealing effect.
Patent Information
- Application Number
- CN202422841801.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-11-20
AI Technical Summary
When the existing gate valve is in the fully open state, the valve stem is easily disturbed by external dust and water vapor, resulting in rust or wear, and the gate has poor sealing performance and is prone to wear especially under the impact of water flow.
A linked gate-type dust-proof and waterproof double-layer sealing mechanism is designed, which adopts an oil chamber and lubricating oil to coat the valve stem, and the sleeve and top cover are sealed. The movable rod and deformable sheet are combined to form a double-layer arc-surface gate to reduce water flow impact.
It effectively prevents valve stem from rusting, reduces dust intrusion, improves gate sealing, reduces water flow impact wear, and ensures normal closure of gate valve.
Smart Images
Figure CN223359949U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gate valve sealing mechanisms, in particular to a linked gate type dustproof and waterproof double-layer sealing mechanism. Background Art
[0002] A gate valve is a gate disc that opens and closes. The direction of movement of the disc is usually perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. At the same time, the gate valve is sealed by the contact between the valve seat and the disc, and the sealing surface is usually achieved by various sealing mechanisms, so that the gate valve can be fully closed smoothly to improve the gate valve's flow-blocking capacity.
[0003] However, when the existing gate valve is in the fully open state, the valve stem controlling the gate plate usually extends out of the valve body and is exposed to the outside world, making the valve stem more susceptible to interference from external dust and water vapor, causing the valve stem surface to rust due to accumulated moisture or being unable to descend smoothly due to interference from dust particles, resulting in interference with the normal closing of the gate valve; in addition, the existing gate plate is usually a single-layer non-deformable structure. When the water flow is cut off by the gate plate in the pipeline, one side plane of the gate plate will be impacted by the forward flowing water flow, while the other side plane will be impacted by the backflow formed when part of the water flow is cut off, making the gate plate more susceptible to wear due to the impact on both planes, resulting in weakened sealing of the gate valve gate plate. Utility Model Content
[0004] The purpose of the utility model is to provide a linked gate type dustproof and waterproof double-layer sealing mechanism to solve the problems raised in the above background technology.
[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a linked gate-type dustproof and waterproof double-layer sealing mechanism, comprising a valve body, a bottom cylinder passing through the middle of the valve body, a top cover of the top end of the bottom cylinder being provided with a top cover, a sleeve passing through the middle of the top cover, a vertical rod movably connected to the inner side of the sleeve, an oil chamber is provided at the top inside the bottom cylinder, the interior of the oil chamber is filled with lubricating oil, an opening is provided at the top of the oil chamber, a first clamping block is fixedly connected to the bottom end of the vertical rod, a slide is provided at the middle of the bottom end of the first clamping block, a movable rod is movably connected to the bottom end of the slide, a second clamping block is fixedly connected to the bottom end of the movable rod, and deformation plates are provided on both sides of the first clamping block and the second clamping block.
[0006] Preferably, the top cover is fixedly connected to the connecting flange on the bottom cylinder by fastening bolts, and the sleeve is located directly above the opening.
[0007] Preferably, an air cavity is opened at the bottom of the inner side of the bottom tube, a sealing ring is embedded at the junction of the air cavity and the oil cavity, and the vertical rod is movably connected with the sealing ring.
[0008] Preferably, the vertical rod is movably connected to the oil chamber and the air chamber, and the first clamping block is movably connected to the air chamber through the vertical rod.
[0009] Preferably, the top ends of the two deformable plates are movably connected to the two side walls of the first block, and the bottom ends of the two deformable plates are movably connected to the two side walls of the second block, and both side walls of the two deformable plates are movably connected with connecting plates.
[0010] Preferably, both inner walls of the valve body are fixedly connected with partitions, and the connecting piece is movably connected to the partitions.
[0011] Preferably, a bottom block is fixedly connected to the middle of the bottom end of the valve body, a clamping groove is provided in the middle of the bottom block, and the second clamping block is movably connected to the clamping groove.
[0012] Compared with the prior art, the beneficial effects of the present invention are:
[0013] 1. This linkage gate-type dust-proof and waterproof double-layer sealing mechanism uses the oil chamber, opening and lubricating oil. When the valve stem extends out of the valve body, it will pass through the oil chamber filled with lubricating oil and then slide out, so that a layer of lubricating oil will be applied to the surface of the valve stem, making it difficult for water vapor to adhere to the surface of the valve stem, reducing the probability of the valve stem rusting due to water vapor accumulation. At the same time, the sleeve and the top cover can seal the connection between the valve body and the valve stem, making it difficult for dust particles to enter the interior of the valve body, reducing the adverse effects of dust particles on the valve stem, and thus reducing the interference with the normal closing of the gate valve.
[0014] 2. This linkage gate-type dust-proof and waterproof double-layer sealing mechanism, through the movable rod, slide, first clamping block, second clamping block and deformation piece, changes the gate plate in the gate valve from a single-layer design to a double-layer separated design. At the same time, it can be bent and deformed through the extension and contraction of the movable rod, changing the original flat surface into an arc surface with an arc. Since the impact force of water flow on the flat surface is greater than the impact force on the arc surface, the impact force of water flow on the gate plate becomes smaller, thereby reducing the wear of the gate plate caused by the impact of water flow and improving the sealing performance of the gate plate. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0016] Figure 2 This is a schematic diagram of the oil chamber and slot structure of the utility model;
[0017] Figure 3 This is a schematic structural diagram of the deformable piece and the connecting piece of the utility model;
[0018] Figure 4 This is a structural schematic diagram of the first clamping block and the movable rod of the utility model.
[0019] In the figure: 1. vertical rod; 2. sleeve; 3. top cover; 4. bottom cylinder; 5. oil chamber; 6. opening; 7. lubricating oil; 8. sealing ring; 9. air chamber; 10. first clamping block; 11. slideway; 12. movable rod; 13. deformation plate; 14. second clamping block; 15. clamping groove; 16. valve body; 17. partition; 18. bottom block; 19. connecting plate. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0022] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean 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 an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0023] like Figures 1 to 4 As shown, the linked gate-type dust-proof and waterproof double-layer sealing mechanism of this embodiment includes a valve body 16, a bottom cylinder 4 is passed through the middle of the valve body 16, the top cover of the bottom cylinder 4 is provided with a top cover 3, the middle of the top cover 3 is passed through a sleeve 2, the inner side of the sleeve 2 is movably connected with a vertical rod 1, an oil chamber 5 is provided at the top of the inner side of the bottom cylinder 4, the interior of the oil chamber 5 is filled with lubricating oil 7, an opening 6 is provided at the top of the oil chamber 5, the bottom end of the vertical rod 1 is fixedly connected with a first clamping block 10, a slide 11 is provided in the middle of the bottom end of the first clamping block 10, the bottom of the slide 11 is movably connected with a movable rod 12, the bottom end of the movable rod 12 is fixedly connected with a second clamping block 14, and deformation plates 13 are provided on both sides of the first clamping block 10 and the second clamping block 14.
[0024] Specifically, the valve body 16 is a tubular structure with connecting flanges welded at both ends for connection to the pipeline. The bottom of the bottom cylinder 4 is communicated with the interior of the valve body 16, and the interior of the air cavity 9 is also communicated with the interior of the valve body 16. The function of the top cover 3 is to close the opening 6 of the oil cavity 5 at the top of the bottom cylinder 4, so that the inner diameter of the opening 6 is reduced to the same size as the inner diameter of the sleeve 2, so that external water vapor and dust particles are not easy to enter the interior of the oil cavity 5 and the air cavity 9. The outer diameter of the vertical rod 1 is adapted to the inner diameter of the sleeve 2, so that the vertical rod 1 can maintain better stability when sliding through the top cover 3, while reducing the gap between the vertical rod 1 and the top cover 3. The oil cavity 5 is located at the top of the inner side of the bottom cylinder 4. In addition to lubricating the outer wall of the vertical rod 1, the lubricating oil in the oil cavity 5 7 can play the role of oil seal on the top of the valve body 16, so that the top of the valve body 16 is not easily invaded by water vapor and dust particles, so as to reduce the interference of the vertical rod 1 in the valve body 16. The function of the opening 6 is to facilitate the replenishment of lubricating oil 7 into the oil chamber 5, so that there is enough lubricating oil 7 in the oil chamber 5. The inner diameter of the slide 11 is adapted to the outer diameter of the movable rod 12, so that the top of the movable rod 12 can slide into the interior of the slide 11. The function of the second clamping block 14 is to push the movable rod 12 so that the movable rod 12 can realize the extrusion of the deformation piece 13 by the second clamping block 14 by extending into the slide 11, so that the deformation piece 13 bends and deforms into a curved surface structure. The deformation piece 13 is a flexible metal material and can be deformed after being squeezed by external force. It is corrosion-resistant and not easy to wear.
[0025] Furthermore, the top cover 3 is fixedly connected to the connecting flange on the bottom cylinder 4 by fastening bolts, the sleeve 2 is located directly above the opening 6, and the top cover 3 is a detachable structure, which facilitates the opening 6 at the top of the bottom cylinder 4 and facilitates the replenishment of lubricating oil 7 into the opening 6.
[0026] Furthermore, an air cavity 9 is opened at the bottom of the inner side of the bottom tube 4, and a sealing ring 8 is embedded in the junction of the air cavity 9 and the oil cavity 5. The vertical rod 1 and the sealing ring 8 are movably connected. The function of the air cavity 9 is to facilitate the retraction of the first block 10 and the second block 14 when the valve body 16 is fully opened, thereby realizing the full opening of the valve body 16. The function of the sealing ring 8 is to prevent the lubricating oil 7 in the oil cavity 5 from leaking into the air cavity 9, and at the same time enable the vertical rod 1 to smoothly pass through the junction of the oil cavity 5 and the air cavity 9.
[0027] Furthermore, the vertical rod 1 is movably connected to the oil chamber 5 and the air chamber 9, and the first clamping block 10 is movably connected to the air chamber 9 through the vertical rod 1. When the valve body 16 is in a fully open state, the bottom end of the vertical rod 1 will be at the sealing ring 8. At the same time, the first clamping block 10 and the second clamping block 14 are both located in the air chamber 9, and the bottom end of the movable rod 12 is located at the bottom of the slide 11.
[0028] Furthermore, the top ends of the two deformable sheets 13 are movably connected to the two side walls of the first block 10, and the bottom ends of the two deformable sheets 13 are movably connected to the two side walls of the second block 14. The two side walls of the two deformable sheets 13 are movably connected with connecting sheets 19. The function of the connecting sheet 19 is to enable the two deformable sheets 13 to form a complete gate structure to achieve sealing of the valve body 16.
[0029] Furthermore, the inner walls on both sides of the valve body 16 are fixedly connected with partitions 17, and the connecting piece 19 is movably connected to the partition 17. The surface of the connecting piece 19 can fit with the partition 17, so that the interior of the valve body 16 can be fully closed when it needs to be closed.
[0030] Furthermore, a bottom block 18 is fixedly connected to the middle of the bottom end of the valve body 16, and a slot 15 is provided in the middle of the bottom block 18. The second block 14 is movably connected to the slot 15. The function of the slot 15 is to facilitate the insertion of the second block 14 so that the bottom of the valve body 16 can be completely closed.
[0031] The method of using this embodiment is as follows: when using this linked gate-type dust-proof and waterproof double-layer sealing mechanism, it is necessary to first connect the valve body 16 and the fluid pipeline through the connecting flange, and at the same time, it is necessary to inject an appropriate amount of lubricating oil 7 into the oil chamber 5, then pass the sleeve 2 on the top cover 3 through the top of the vertical rod 1, and then use the fastening bolts to fix the top cover 3 and the top of the bottom cylinder 4, so that the opening 6 at the top of the oil chamber 5 is closed. When the gate valve is opened, the vertical rod 1 will be lifted, so that the part of the vertical rod 1 originally immersed in the lubricating oil 7 of the oil chamber 5 will pass through the sleeve 2 at the top of the top cover 3 and then enter the outside world. At this time, a layer of lubricating oil 7 film will be attached to the outer wall of the vertical rod 1, and lubricating oil 7 will also accumulate at the connection between the sleeve 2 and the vertical rod 1, so that external water vapor and dust particles are not easy to enter the valve body 16. The first block 10 and the second block 14 at the bottom of the vertical rod 1 will be brought into the air cavity 9. At this time, the interior of the valve body 16 is in a fully open state. When the vertical rod 1 moves downward, it will push the first block 10, the second block 14 and the deformation piece 13 to move downward. At this time, the top of the movable rod 12 is at the bottom of the slide 11. Until the second block 14 is pushed into the slot 15 of the bottom block 18, the second block 14 will be pushed by the slot 15 to push the movable rod 12, so that the top of the movable rod 12 moves from the bottom of the slide 11 to the top of the slide 11, and at the same time drives the deformation piece 13 to bend and deform, so that the curvature of the surface of the deformation piece 13 becomes larger, thereby prompting the surface of the deformation piece 13 to form a curved surface, so that the impact force of the cut-off water flow on the deformation piece 13 becomes smaller.
[0032] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.
Claims
1. A linked gate-type dustproof and waterproof double-layer sealing mechanism, comprising a valve body (16), characterized in that: The middle of the valve body (16) is penetrated by a bottom cylinder (4), the top cover of the bottom cylinder (4) is provided with a top cover (3), the middle of the top cover (3) is penetrated by a sleeve (2), the inner side of the sleeve (2) is movably connected to a vertical rod (1), the top of the inner side of the bottom cylinder (4) is provided with an oil chamber (5), the interior of the oil chamber (5) is filled with lubricating oil (7), the top of the oil chamber (5) is provided with an opening (6), the bottom end of the vertical rod (1) is fixedly connected to a first clamping block (10), the middle of the bottom end of the first clamping block (10) is provided with a slideway (11), the bottom of the slideway (11) is movably connected to a movable rod (12), the bottom end of the movable rod (12) is fixedly connected to a second clamping block (14), and both sides of the first clamping block (10) and the second clamping block (14) are provided with deformation plates (13).
2. The linkage gate type dustproof and waterproof double-layer sealing mechanism according to claim 1, characterized in that: The top cover (3) is fixedly connected to the connecting flange on the bottom cylinder (4) via fastening bolts, and the sleeve (2) is located directly above the opening (6).
3. The linkage gate type dustproof and waterproof double-layer sealing mechanism according to claim 1, characterized in that: An air cavity (9) is provided at the bottom of the inner side of the bottom cylinder (4), a sealing ring (8) is embedded at the junction of the air cavity (9) and the oil cavity (5), and the vertical rod (1) is movably connected to the sealing ring (8).
4. The linkage gate type dustproof and waterproof double-layer sealing mechanism according to claim 3, characterized in that: The vertical rod (1) is movably connected to the oil chamber (5) and the air chamber (9), and the first clamping block (10) is movably connected to the air chamber (9) through the vertical rod (1).
5. The linkage gate type dustproof and waterproof double-layer sealing mechanism according to claim 1, characterized in that: The top ends of the two deformable sheets (13) are movably connected to the two side walls of the first clamping block (10), and the bottom ends of the two deformable sheets (13) are movably connected to the two side walls of the second clamping block (14). Both side walls of the two deformable sheets (13) are movably connected to connecting sheets (19).
6. The linkage gate type dustproof and waterproof double-layer sealing mechanism according to claim 5, characterized in that: The inner walls on both sides of the valve body (16) are fixedly connected with partitions (17), and the connecting piece (19) is movably connected to the partitions (17).
7. The linkage gate type dustproof and waterproof double-layer sealing mechanism according to claim 1, characterized in that: The middle of the bottom end of the valve body (16) is fixedly connected to a bottom block (18), a clamping groove (15) is provided in the middle of the bottom block (18), and the second clamping block (14) is movably connected to the clamping groove (15).