Hydraulic support base plug and hydraulic support thereof

Abstract

The utility model relates to the technical field of coal mine machinery, and disclose a kind of hydraulic support base plug and its hydraulic support, including plug body, the outer ring of plug body is provided with plugging air bag, the middle part of plug body one end is provided with handle, the middle part of plug body is provided with cavity, the one end of handle and cavity is movably connected, the handle includes driving rod and driven rod movably connected with the inner cavity of driving rod, the driving rod is connected with driven rod by first torsional spring, the one end of driving rod close to driven rod is evenly provided with clamping column, the one end of driving rod away from driven rod is provided with handle. The present application can control the expansion volume of plugging air bag by the transfer of quantitative gas, constrain the extrusion force of plugging air bag to interface, avoid interface structure damage due to excessive extrusion force, and ensure the reliability of plug use and plugging effect.

Description

Technical Field

[0001] This utility model relates to the field of coal mining machinery technology, specifically to a hydraulic support base plug and its hydraulic support. Background Technology

[0002] Hydraulic supports are the core support equipment in fully mechanized coal mining faces. Together with coal mining machines and scraper conveyors, they are known as the "three machines of fully mechanized mining." They bear the heavy responsibility of supporting the roof, isolating goaf areas, and ensuring the safety of workers and equipment. Hydraulic support base plugs are functional parts of the hydraulic support base components in fully mechanized coal mining faces. They are mainly used to seal or plug specific interfaces, holes, or pipelines on the base to prevent liquid leakage, impurity intrusion, or entry of irrelevant media, thus ensuring the normal operation of the hydraulic supports.

[0003] In existing technologies, the sealing solutions for the reserved interfaces of hydraulic support bases mainly include the following forms: 1. Screwing the plug with the base interface through a threaded joint, using the preload force between the threads to compress the sealing surface and achieve a seal; 2. Using the interference fit between the outer diameter of the plug and the inner diameter of the interface, using the elastic deformation of the material to generate radial pressure, making the plug and the interface fit tightly together and achieve a seal; 3. Using the radial contraction force of a ferrule, etc., to press the plug against the inner wall of the interface, combined with the end face seal to achieve a seal. When using the above methods, there is a high risk of damage to the interface / plug: the interference fit can easily scratch the inner wall of the interface during disassembly and assembly; uneven force during threading may cause stripping; improper control of the radial contraction force of the ferrule can easily cause deformation of the inner wall of the interface, affecting the accuracy of repeated use of the interface. In addition, in order to reduce the difficulty of disassembly and assembly, the above solutions mostly adopt an exposed structural design (such as the threaded end, the ferrule operating ring, the plug end, etc.). Exposed parts are prone to scratching other equipment or tripping hazards. Based on this, this application proposes a hydraulic support base plug and its hydraulic support. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a hydraulic support base plug and its hydraulic support, which solves the safety hazards mentioned in the background art, such as the externally exposed plug component being prone to scraping against adjacent equipment in narrow downhole spaces or causing personnel to trip, and the high risk of damage to the interface or itself during plug disassembly and assembly.

[0005] This utility model provides the following technical solution: a hydraulic support base plug, comprising a plug body, a sealing airbag disposed on the outer ring of the plug body, a handle disposed at the middle of one end of the plug body, a cavity disposed in the middle of the plug body, the handle being movably connected to one end of the cavity, the handle comprising a driving rod and a driven rod movably connected to the inner cavity of the driving rod, the driving rod and the driven rod being connected by a first torsion spring, the driving rod having evenly distributed locking pins at the end near the driven rod, and a handle disposed at the end of the driving rod away from the driven rod, and the handle being provided with... The cavity has a groove; a limiting structure is provided inside the cavity, the limiting structure includes a limiting block, a rotating tube, and a fixed tube that are movably connected to the cavity. The limiting block is connected to the cavity via a second spring. A limiting groove adapted to the limiting block is provided on the side of the driven rod near the limiting block. The driven rod is movably connected to the inner cavity of the rotating tube. A slot adapted to the driving rod is provided on the side of the rotating tube near the handle. The slot is evenly provided with slots adapted to the locking pins. The limiting block is connected to the outer ring of the rotating tube via a pull rope. The rotating tube is connected to the fixed tube via a second torsion spring.

[0006] Preferably, the other end of the cavity is provided with an inflatable airbag and a positioning tube. The inner cavity of the inflatable airbag is connected to the inner cavity of the sealing airbag through a connecting channel. The inner cavity of the positioning tube is provided with a first spring. The end of the first spring near the handle is connected to a push plate. The end of the push plate near the handle is provided with a positioning plate. The inflatable airbag and the end of the push plate away from the handle are in a tight fit.

[0007] Preferably, the driven rod has a protrusion at the end away from the driving rod, and a guide groove adapted to the protrusion is provided in the cavity.

[0008] Preferably, a guide wheel is provided inside the cavity, the pull rope is wound around the guide wheel, the pull rope is in contact with the top of the guide wheel, and the two ends of the pull rope are located on the same side of the guide wheel.

[0009] Preferably, when the limiting block is inserted into the limiting groove, the distance between the positioning plate and the limiting block is less than the length of the locking post, and the maximum distance between the end of the guide groove near the handle and the protrusion is not less than the thickness of the handle and greater than the length of the locking post.

[0010] A hydraulic support includes a base with a reserved interface, which is sealed by a hydraulic support base plug.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. By transferring a fixed amount of gas, the expansion volume of the sealing airbag can be controlled, the squeezing pressure of the sealing airbag on the interface can be constrained, and damage to the interface structure due to excessive squeezing pressure can be avoided, thus ensuring the reliability of the plug and the sealing effect.

[0013] 2. When the limiting block is inserted into the limiting groove and restricts the handle, the positioning plate moves with the handle to the side position of the limiting block. At this time, the locking pin is just embedded in the corresponding slot, forming the first layer of locking. If an external force attempts to pull the handle outward, the positioning plate will abut against the side wall of the limiting block, continuously restricting the outward movement of the handle. During this process, the locking pin remains in the engagement state with the slot, enhancing the locking reliability and thus ensuring the reliability of the connection between the plug and the reserved interface. Attached Figure Description

[0014] Figure 1 This is a cross-sectional schematic diagram of a hydraulic support base plug according to the present invention during use;

[0015] Figure 2 This is a cross-sectional view of the handle structure of this utility model;

[0016] Figure 3 This is a right view of the structure of this utility model when the rotating tube and the fixed tube are connected;

[0017] Figure 4 This is a schematic diagram of a hydraulic support proposed in this utility model.

[0018] In the diagram: 1. Base; 2. Reserved interface; 3. Plug body; 4. Sealing airbag; 5. Handle; 6. Groove; 7. Driving rod; 8. Driven rod; 9. Limiting block; 10. Rotating tube; 11. Fixing tube; 12. Connecting channel; 13. Inflatable airbag; 14. Positioning tube; 15. First spring; 16. Positioning plate; 17. Second spring; 18. Pull rope; 19. Guide wheel; 20. Protrusion; 21. Limiting groove; 22. First torsion spring; 23. Locking post; 24. Slot; 25. Second torsion spring; 26. Push plate. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1-4A hydraulic support base plug includes a plug body 3, with a sealing airbag 4 disposed on the outer ring of the plug body 3. A handle is disposed in the middle of one end of the plug body 3, and a cavity is disposed in the middle of the plug body 3. The handle is movably connected to one end of the cavity. The handle includes an active rod 7 and a driven rod 8 movably connected to the inner cavity of the active rod 7. Under the action of external force, the active rod 7 can rotate relative to the driven rod 8. The active rod 7 and the driven rod 8 are connected by a first torsion spring 22. With the setting of the first torsion spring 22, when the position of the driven rod 8 remains unchanged, after the active rod 7 rotates, the restriction on the active rod 7 is released. Under the action of the rebound force of the first torsion spring 22, the first torsion spring 22 can drive the active rod 7 to reset.

[0021] The active rod 7 is provided with locking pins 23 evenly distributed at one end near the driven rod 8, and a handle 5 is provided at the other end of the active rod 7 away from the driven rod 8. The handle 5 is provided with a groove 6. In embodiment 1, the groove 6 is adapted to the screwdriver tip. After the user inserts the screwdriver tip into the groove 6 and screws the screwdriver, the screwdriver can drive the handle 5 to rotate, and the handle 5 can drive the active rod 7 to rotate.

[0022] A limiting structure is provided inside the cavity. The limiting structure includes a limiting block 9, a rotating tube 10, and a fixed tube 11 that are movably connected to the cavity. The rotating tube 10 is movably connected to the plug body 3. The limiting block 9 is connected to the cavity through a second spring 17. A limiting groove 21 that matches the limiting block 9 is provided on the side of the driven rod 8 near the limiting block 9. The driven rod 8 is movably connected to the inner cavity of the rotating tube 10. A slot 24 that matches the driving rod 7 is provided on the side of the rotating tube 10 near the handle 5. Slots that match the locking pins 23 are evenly arranged in the slot 24. The limiting block 9 and the outer ring of the rotating tube 10 are connected by a pull rope 18. A guide wheel 19 is provided inside the cavity. The pull rope 18 is wound around the guide wheel 19. The pull rope 18 contacts the top of the guide wheel 19. The two ends of the pull rope 18 are located on the same side of the guide wheel 19. With the setting of the rotating tube 10, when the locking pin 23 is inserted into the locking groove under the action of external force, when the handle 5 is rotated, the handle 5 can drive the rotating tube 10 to rotate through the active rod 7 and the locking pin 23. The rotation of the rotating tube 10 allows the pull rope 18 to be wound around the outer ring of the rotating tube 10. The end of the pull rope 18 connected to the limiting block 9 can drive the limiting block 9 to move upward, so that the limiting block 9 moves away from the driven rod 8. When the limiting block 9 is separated from the limiting groove 21, the restriction of the limiting block 9 on the driven rod 8 can be released.

[0023] The end of the rotating tube 10 near the handle 5 is located inside the fixed tube 11. The rotating tube 10 and the fixed tube 11 are connected by a second torsion spring 25. The fixed tube 11 is fixedly connected to the plug body 3. With the setting of the second torsion spring 25, when the active rod 7 moves outward until the locking post 23 separates from the locking groove, the rotating tube 10 can be reset under the action of the rebound force of the second torsion spring 25, so as to realize the unwinding of the pull rope 18.

[0024] A protrusion 20 is provided at the end of the driven rod 8 away from the driving rod 7, and a guide groove adapted to the protrusion 20 is provided in the cavity. Under the restriction of the guide groove, the driven rod 8 can only move along a straight trajectory in the cavity, and when the driving rod 7 rotates, the cavity can restrict the driven rod 8 to prevent the driven rod 8 from rotating.

[0025] The maximum distance between the end of the guide groove near the handle 5 and the protrusion 20 is not less than the thickness of the handle 5. The thickness of the handle 5 and the maximum distance between the end of the guide groove near the handle 5 and the protrusion 20 can be set according to requirements and are not limited here. With this setting, when the protrusion 20 contacts the end of the guide groove near the handle 5, the handle 5 can be moved to the outside of the recessed groove, making it convenient for the user to separate the plug body 3 from the interface by using the handle.

[0026] As described above, when the limiting groove 21 is aligned with the limiting block 9, under the action of the return force of the second spring 17, the limiting block 9 can be inserted into the limiting groove 21, thereby limiting the position of the handle. Figure 1 As shown, the end of the plug body 3 near the handle 5 is provided with a recessed groove. When the limiting block 9 limits the handle, the handle 5 is located in the recessed groove, so that when the application is in use, the plug can be completely located in the interface to be sealed, avoiding the plug structure from being exposed. The plug will not cause any additional safety problems when in use.

[0027] The other end of the cavity is provided with an inflatable airbag 13 and a positioning tube 14. The inner cavity of the inflatable airbag 13 is connected to the inner cavity of the sealing airbag 4 through a connecting channel 12. The inflatable airbag 13 is filled with air or other safety gases. When the inflatable airbag 13 is compressed, the gas in the inflatable airbag 13 can enter the sealing airbag 4 through the connecting channel 12, causing the sealing airbag 4 to expand in volume. The sealing airbag 4 can then seal the gap between the plug body 3 and the inner wall of the interface to be sealed, achieving an interference fit between the plug body 3 and the sealing interface, improving the sealing effect of the plug body 3, and removing the restriction on the inflatable airbag 13. Under the action of the rebound force of the sealing airbag 4, the gas in the sealing airbag 4 can flow back into the inflatable airbag 13, and the volume of the sealing airbag 4 shrinks, making it easier to remove the plug. This application controls the expansion volume of the sealing airbag 4 by transferring a fixed amount of gas, thus constraining the compressive force of the sealing airbag 4 on the interface and preventing damage to the interface structure due to excessive compressive force, thereby ensuring the reliability and sealing effect of the plug. The materials of both the sealing airbag 4 and the inflatable airbag 13 can be set according to requirements and are not limited here.

[0028] The inner cavity of the positioning tube 14 is provided with a first spring 15. A push plate 26 is connected to the end of the first spring 15 near the handle, and a positioning plate 16 is provided to the end of the push plate 26 near the handle. The inflatable airbag 13 and the end of the push plate 26 away from the handle are in close contact. In use, the positioning tube 14 can limit the handle's movement within the cavity. When the push plate 26 is in close contact with the positioning tube 14 under the pressure of the handle, a preset volume of gas in the inflatable airbag 13 enters the sealing airbag 4 through the connecting channel 12. When the restriction on the handle is released, the first spring 15, under the action of its rebound force, can move the handle outward via the push plate 26. The movement of the push plate 26 can also move the positioning plate 16, facilitating the positioning plate 16 to limit the positioner block 9. The rotation angle of the rotating tube 10 can be set as needed and is not limited here. When the rotating tube 10 reaches the preset rotation angle, the positioner block 9 can move above the positioning plate 16.

[0029] When the limiting block 9 is inserted into the limiting groove 21, the distance between the positioning plate 16 and the limiting block 9 is less than the length of the locking post 23. The maximum distance between the end of the guide groove near the handle 5 and the protrusion 20 is not less than the thickness of the handle 5 and greater than the length of the locking post 23. The maximum distance between the end of the guide groove near the handle 5 and the protrusion 20, the length of the locking post 23, and the distance between the positioning plate 16 and the limiting block 9 can be set according to requirements and are not limited here. With this setting, when the limiting block 9 is inserted into the limiting groove 21 and restricts the handle, the positioning plate 16 moves with the handle to the lateral position of the limiting block 9. At this time, the locking post 23 is just embedded in the corresponding slot, forming the first layer of locking.

[0030] If an external force attempts to pull the handle outward, the positioning plate 16 will abut against the side wall of the limiting block 9, continuously restricting the outward movement of the handle. During this process, the locking post 23 remains engaged with the slot, enhancing the locking reliability.

[0031] After the locking pin 23 is completely separated from the slot, the handle can move along a straight trajectory in the cavity until the guide groove limits the protrusion 20. This design avoids accidental unlocking caused by accidental touch of the handle, while retaining the necessary freedom of movement, achieving a balance between "locking stability" and "operational flexibility". Before the locking pin 23 is completely separated from the slot, the end of the positioning plate 16 near the handle 5 will move to the bottom of the limiting block 9 to restrict the limiting block 9 and prevent the position of the limiting block 9 from changing during the reset of the rotating tube 10, so that the second spring 17 is in a compressed state.

[0032] This application also provides a hydraulic support, including a base 1, on which a reserved interface 2 is provided. The reserved interface 2 is sealed by a hydraulic support base plug. When the plug seals the reserved interface 2, the handle 5 is located in the inner cavity of the reserved interface. The reserved interface 2 adapted to the plug body 3 is stepped or conical. The inner diameter of the reserved interface 2 at the end away from the base 1 is larger than the inner diameter at the end close to the base 1.

[0033] In summary, when using this application to seal the reserved interface 2 with the plug, the user inserts the plug body 3 into the inner cavity of the reserved interface 2 until the plug body 3 can no longer move within the reserved interface 2. At this point, the end of the plug body 3 near the handle 5 is flush with the end of the reserved interface 2 away from the base 1. Figure 1 As shown, when the user presses the handle 5 inward, the handle 5 moves the active rod 7 and the driven rod 8. When the driven rod 8 moves, it squeezes the first spring 15 and the inflatable airbag 13 through the push plate 26. When the push plate 26 is tightly attached to the positioning tube 14, the limiting block 9 is aligned with the limiting groove 21. Under the action of the rebound force of the second spring 17, the limiting block 9 is inserted into the limiting groove 21 to limit the handle. A certain amount of gas in the inflatable airbag 13 is squeezed into the sealing airbag 4 through the connecting channel 12. The sealing airbag 4 expands in volume and can then seal the gap between the plug body 3 and the inner wall of the interface to be sealed, achieving an interference fit between the plug body 3 and the sealing interface, improving the sealing effect of the plug body 3. At this time, the handle 5 is located in the inner cavity of the reserved interface 2 to prevent the plug from having any external leakage parts.

[0034] When the plug needs to be removed, the user inserts the screwdriver head that matches the groove 6 into the groove 6, and uses the screwdriver to drive the handle 5 to rotate at a preset angle. The handle 5 drives the active rod 7 to rotate, and the active rod 7 drives the rotating tube 10 to rotate at a preset angle through the locking post 23. One end of the pull rope 18 is wrapped around the rotating tube 10, and the other end of the pull rope 18 drives the limiting block 9 to move up to the top of the positioning plate 16. Under the action of the rebound force of the first spring 15, the first spring 15 can push the handle outward until the protrusion 20 is in contact with the inner wall of the cavity. At this time, the handle 5 moves to the outside of the reserved interface 2, and the gas in the sealing airbag 4 can flow back into the inflation airbag 13. The volume of the sealing airbag 4 is reduced, and the user can remove the plug through the handle.

[0035] All standard parts used in this utility model can be purchased from the market, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The materials and specifications of each component can be selected according to the requirements and are not limited here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art. Although the embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A hydraulic support base plug, comprising a plug body (3), characterized in that: The outer ring of the plug body (3) is provided with a sealing airbag (4). A handle is provided at the middle of one end of the plug body (3). A cavity is provided in the middle of the plug body (3). The handle is movably connected to one end of the cavity. The handle includes an active rod (7) and a driven rod (8) movably connected to the inner cavity of the active rod (7). The active rod (7) and the driven rod (8) are connected by a first torsion spring (22). The active rod (7) near the driven rod (8) is provided with locking pins (23). The active rod (7) away from the driven rod (8) is provided with a handle (5), and the handle (5) is provided with a groove (6). A limiting structure is provided in the cavity. The limiting structure includes a movable part of the cavity. The limiting block (9), rotating tube (10) and fixed tube (11) are connected. The limiting block (9) is connected to the cavity through the second spring (17). The driven rod (8) is provided with a limiting groove (21) that matches the limiting block (9) on the side near the limiting block (9). The driven rod (8) is movably connected to the inner cavity of the rotating tube (10). The rotating tube (10) is provided with a slot (24) that matches the driving rod (7) on the side near the handle (5). The slot (24) is evenly provided with slots that match the locking post (23). The outer ring of the limiting block (9) and the rotating tube (10) is connected by a pull rope (18). The rotating tube (10) and the fixed tube (11) are connected by the second torsion spring (25).

2. The hydraulic support base plug according to claim 1, characterized in that: The other end of the cavity is provided with an inflatable airbag (13) and a positioning tube (14). The inner cavity of the inflatable airbag (13) is connected to the inner cavity of the sealing airbag (4) through a connecting channel (12). The inner cavity of the positioning tube (14) is provided with a first spring (15). The end of the first spring (15) near the handle is connected to a push plate (26). The end of the push plate (26) near the handle is provided with a positioning plate (16). The inflatable airbag (13) and the end of the push plate (26) away from the handle are in a close fit.

3. A hydraulic support base plug according to claim 2, characterized in that: The driven rod (8) is provided with a protrusion (20) at the end away from the driving rod (7), and a guide groove adapted to the protrusion (20) is provided in the cavity.

4. A hydraulic support base plug according to claim 1, characterized in that: A guide wheel (19) is provided inside the cavity, and the pull rope (18) is wound around the guide wheel (19). The pull rope (18) is in contact with the top of the guide wheel (19), and the two ends of the pull rope (18) are located on the same side of the guide wheel (19).

5. A hydraulic support base plug according to claim 3, characterized in that: When the limiting block (9) is inserted into the limiting groove (21), the distance between the positioning plate (16) and the limiting block (9) is less than the length of the locking post (23), and the maximum distance between the end of the guide groove near the handle (5) and the protrusion (20) is not less than the thickness of the handle (5) and greater than the length of the locking post (23).

6. A hydraulic support, comprising a base (1), characterized in that: The base (1) is provided with a reserved interface (2), which is sealed by a hydraulic support base plug as described in claim 1.

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