Multi-seal single hydraulic prop for coal mine underground coal mining face roof support

Abstract

The utility model relates to hydraulic prop technical field, concretely is used for coal mine underground coal face roof support's many seal single body hydraulic prop, including cylinder body, the upper surface embedding movable connection of cylinder body has movable column, the upper end fixedly connected with support disc of movable column, the outer surface of movable column is matched with one no.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic support technology, specifically a multi-sealed single hydraulic support for roof support of underground coal mining faces. Background Technology

[0002] A single hydraulic prop is a retractable prop that uses liquid pressure to generate working resistance and achieves lifting and unloading. As the most common support equipment in coal mining faces, single hydraulic props are widely used in the exits of two roadways, advance support, and other temporary roadway support. Some technical solutions have also emerged in the existing technology, such as the mining single hydraulic prop described in announcement number CN223190451U, which includes a deformable base, a cylinder, a top column, and a support seat. The cylinder is a column with a shell at the top. The deformable base is set on the bottom surface of the cylinder. The lower end of the top column is set in the inner cavity of the cylinder. The top column is a columnar structure with a cross-section that matches the shape and size of the cylinder opening. The deformable base has a variable bottom contact surface shape. A support structure is set between the outer periphery of the deformable base contact surface and the outer wall of the cylinder. The support seat is set on the top surface of the top column. Although the above-mentioned device can increase the grounding area and improve the stability of the device, the surface of the movable column is exposed after it extends out. The environment inside the frame is relatively complex, and the exposed surface coating is easily damaged. Later, coal dust can easily enter the inner cavity of the oil cylinder, leading to damage to the device. Utility Model Content

[0003] The purpose of this invention is to provide a multi-sealed single hydraulic prop for roof support in underground coal mining faces, in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A multi-sealed single hydraulic prop for roof support of underground coal mining face includes a cylinder body, a movable column embedded in the upper surface of the cylinder body, and a support plate fixedly connected to the upper end of the movable column. The outer surface of the movable column is engaged with a clamp assembly No. 1. The clamp assembly No. 1 includes a first half clamp and a hinged column. The first half clamp is engaged with the outer surface of the movable column, and the hinged column is hinged to the lower surface of the first half clamp. A connecting rod is threaded to the lower end of the hinged column. The outer surface of the cylinder is engaged with a second clamp assembly, which includes a second half clamp, a support leg, a limit bolt, an anti-slip sleeve, and a guide plate. The second half clamp is engaged with the outer surface of the cylinder, the support leg is hinged to the outer surface of the second half clamp, the limit bolt is threaded to the outer surface of the support leg, the anti-slip sleeve is nested to the end of the support leg, and the outer surface of the anti-slip sleeve is fixedly connected with a rod and a guide plate, which are fixedly connected to the upper surface of the second half clamp. A corrugated pipe is fixedly connected between the second half-hoop and the first half-hoop.

[0005] Furthermore, the outer surface of the cylinder is fixedly connected to a first limiting block, the outer surface of the movable column is fixedly connected to a second limiting block, and the inner surfaces of the first and second half-hoops are both provided with limiting grooves. The limiting grooves match the first and second limiting blocks, and adjacent first half-hoops are connected by threaded assemblies, and the same applies to the second half-hoops.

[0006] Furthermore, a handle is fixedly connected to the outer surface of the cylinder body, and a slot is opened on the outer surface of the handle, with the support leg engaging with the slot.

[0007] Furthermore, a valve assembly is embedded in the outer surface of the movable column.

[0008] Furthermore, the upper surface of the first half-hoop is provided with an insertion hole, and the insertion hole and the insertion rod are inserted into it.

[0009] Furthermore, both ends of the bellows are fixedly connected to flanges, and the flanges and the second and first half-hoops are matched.

[0010] Furthermore, the connecting rod passes through the guide plate and is slidably connected to the guide plate. Both ends of the connecting rod are fixedly connected to threaded posts, and the connecting rod is fixedly connected through the threaded posts and hinged posts.

[0011] Compared with the prior art, the beneficial effects of this utility model are: The bellows seals the exposed parts of the movable column after it extends out, reducing the possibility of damage to the exposed parts. The hinged column, together with the connecting rod, passes through the guide plate to assist in guiding the lifting and lowering of the movable column. The support leg can be flipped up and down. When the support leg is in the flipped-up state, the plug rod and plug hole on the anti-slip sleeve are inserted to limit the support leg. The support leg is located outside the bellows. When the hydraulic support is laid flat, it prevents the bellows from being directly squeezed by the external environment and can protect the bellows. The limiting bolt, pushed by the thread, abuts against the inner wall of the handle, exerting a reaction force on the support leg and the handle, making the connection between the two more stable. The line connecting the projections of the four anti-slip sleeves on the plane is a quadrilateral. Compared with the circular projection of the cylinder, the former has a larger area, making it less likely for the vertical line of the device's center of gravity to fall outside the polygon, further improving the stability of the device. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the storage structure of this utility model; Figure 2 This is a schematic diagram of the unfolded state of this utility model; Figure 3 This is a schematic diagram of the disassembled structure of this utility model; Figure 4 This is a schematic diagram of the combined structure of this utility model.

[0013] In the diagram: 1. Cylinder body; 101. First limiting block; 102. Handle; 103. Slot; 2. Movable column; 201. Second limiting block; 202. Support plate; 203. Valve assembly; 3. First clamp assembly; 301. First half clamp; 302. Hinge column; 303. Connecting rod; 304. Insertion hole; 305. Limiting groove; 4. Second clamp assembly; 401. Second half clamp; 402. Support leg; 403. Limiting bolt; 404. Anti-slip sleeve; 405. Insertion rod; 406. Guide plate; 5. Bellows; 501. Flange. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-4 In this embodiment of the utility model, the multi-sealed single hydraulic prop for roof support of underground coal mining face includes a cylinder body 1, a movable column 2 is embedded and movably connected to the upper surface of the cylinder body 1, and a support plate 202 is fixedly connected to the upper end of the movable column 2. The outer surface of the movable column 2 is engaged with a clamp assembly 3. The clamp assembly 3 includes a first half clamp 301 and a hinge column 302. The first half clamp 301 is engaged with the outer surface of the movable column 2, and the hinge column 302 is hinged to the lower surface of the first half clamp 301. The lower end of the hinge column 302 is threaded with a connecting rod 303. A valve assembly 203 is embedded in the outer surface of the movable column 2. The outer surface of cylinder 1 is engaged with a second clamp assembly 4. The second clamp assembly 4 includes a second half clamp 401, a support leg 402, a limiting bolt 403, an anti-slip sleeve 404, and a guide plate 406. The second half clamp 401 is engaged with the outer surface of cylinder 1. The support leg 402 is hinged to the outer surface of the second half clamp 401. The limiting bolt 403 is threaded to the outer surface of the support leg 402. The anti-slip sleeve 404 is nested at the end of the support leg 402. The outer surface of the anti-slip sleeve 404 is fixedly connected with an insertion rod 405. The guide plate 406 is fixedly connected to the upper surface of the second half clamp 401. The upper surface of the first half clamp 301 is provided with an insertion hole 304, and the insertion hole 304 and the insertion rod 405 are inserted into each other. A corrugated pipe 5 is fixedly connected between the second half-hoop 401 and the first half-hoop 301.

[0016] Specifically, the hydraulic prop consisting of cylinder 1 and movable column 2 is a DN25-250 / 90 internal injection type single hydraulic prop, 2.5 meters, hand-cranked. In addition to the existing seals of the hydraulic prop, a bellows 5 is added for sealing the exposed parts of the movable column 2. During use, the bottom surface of cylinder 1 contacts the ground, and the movable column 2, together with the support plate 202, supports the top plate of the working surface. There are two clamp components 3; the two first half-clamps 301 are engaged with the threaded components to connect to the outer surface of the movable column 2. At the position of the second limiting block 201, the installation of the second clamp assembly 4 is similar. The hinge column 302, together with the connecting rod 303, passes through the guide plate 406 to assist in guiding the lifting and lowering of the movable column 2. The support leg 402 can be flipped up and down. When the support leg 402 is in the flipped-up state, the insert rod 405 on the anti-slip sleeve 404 and the insert hole 304 are inserted to limit the support leg 402. The support leg 402 is located outside the bellows 5. When the hydraulic support is laid flat, it prevents the bellows 5 from being directly squeezed by the outside and can protect the bellows 5. Example 1

[0017] like Figure 1-4 As shown, a first limiting block 101 is fixedly connected to the outer surface of the cylinder body 1, and a second limiting block 201 is fixedly connected to the outer surface of the movable column 2. Limiting grooves 305 are opened on the inner surfaces of the first half-hoop 301 and the second half-hoop 401. The limiting grooves 305 match the first limiting block 101 and the second limiting block 201, and adjacent first half-hoops 301 are connected by threaded assemblies. The same applies to the second half-hoops 401.

[0018] In this embodiment, the width of the limiting groove 305 is 0.1-0.2 mm larger than the thickness of the corresponding first limiting block 101 and second limiting block 201, forming a sliding gap, so that the first half hoop 301 and the second half hoop 401 can be quickly pushed in axially and radially clamped. Example 2

[0019] Based on Embodiment 1, in order to overcome the problem that it is inconvenient to improve the stability of the device in Embodiment 1.

[0020] like Figure 1-4 As shown, a handle 102 is fixedly connected to the outer surface of the cylinder body 1. A slot 103 is provided on the outer surface of the handle 102, and the support leg 402 is engaged with the slot 103. In this embodiment, after the handle 102 is welded to the cylinder 1, the slot 103 is machined as a whole. After the support leg 402 is flipped downward, the protruding part of the outer surface of the support leg 402 engages with the slot 103. The anti-slip sleeve 404 contacts the ground for anti-slip operation. The limit bolt 403 is manually rotated. Under the push of the thread, the limit bolt 403 abuts against the inner wall of the handle 102, applying a reaction force to the support leg 402 and the handle 102, making the connection between the two more stable. The line connecting the projections of the four anti-slip sleeves 404 on the plane is a quadrilateral. Compared with the circular projection of the cylinder 1, the former has a larger area, making it less likely for the vertical line of the device's center of gravity to fall outside the polygon, further improving the stability of the device.

[0021] like Figure 1-4 As shown, both ends of the bellows 5 are fixedly connected to flanges 501. Flanges 501 and the second half-hoop 401 and the first half-hoop 301 are matched. The connecting rod 303 passes through the guide plate 406 and is slidably connected to the guide plate 406. Both ends of the connecting rod 303 are fixedly connected to threaded columns. The connecting rod 303 is fixedly connected through the threaded columns and the hinge column 302.

[0022] In this embodiment, the upper surfaces of the second half-hoop 401 and the first half-hoop 301 are provided with through holes, and the second half-hoop 401, the first half-hoop 301 and the bellows 5 are connected by threaded components. For the connection between adjacent hinged columns 302, the connecting rod 303 is manually disassembled, and then the two hinged columns 302 are connected together by the threaded columns at both ends of the connecting rod 303. This is suitable for hydraulic supports with the same height and helps to further improve the stability of the two hydraulic supports.

[0023] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0024] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-sealed single hydraulic prop for roof support of underground coal mining face, comprising a cylinder (1), wherein a movable column (2) is embedded and movably connected to the upper surface of the cylinder (1), and a support plate (202) is fixedly connected to the upper end of the movable column (2). Its features are, The outer surface of the movable column (2) is engaged with a clamp assembly (3), which includes: The first half-hoop (301) is engaged with the outer surface of the movable column (2); A hinged post (302) is hinged to the lower surface of the first half hoop (301), and a connecting rod (303) is threaded to the lower end of the hinged post (302). The outer surface of the cylinder (1) is engaged with a second clamp assembly (4), the second clamp assembly (4) comprising: The second half-hoop (401) is engaged with the outer surface of the cylinder body (1); The support leg (402) is hinged to the outer surface of the second half hoop (401); The limiting bolt (403) is threaded to the outer surface of the support leg (402); An anti-slip sleeve (404) is nested and connected to the end of the support leg (402), and a plug rod (405) is fixedly connected to the outer surface of the anti-slip sleeve (404). The guide plate (406) is fixedly connected to the upper surface of the second half hoop (401); A corrugated pipe (5) is fixedly connected between the second half hoop (401) and the first half hoop (301).

2. The multi-sealed single hydraulic prop for roof support in underground coal mining faces according to claim 1, characterized in that, The outer surface of the cylinder (1) is fixedly connected to a first limiting block (101), and the outer surface of the movable column (2) is fixedly connected to a second limiting block (201). The inner surfaces of the first half-hoop (301) and the second half-hoop (401) are both provided with limiting grooves (305), and the limiting grooves (305) match the first limiting block (101) and the second limiting block (201).

3. The multi-sealed single hydraulic prop for roof support in underground coal mining faces according to claim 1, characterized in that, A handle (102) is fixedly connected to the outer surface of the cylinder (1), and a slot (103) is provided on the outer surface of the handle (102). The support leg (402) is engaged with the slot (103).

4. The multi-sealed single hydraulic prop for roof support in underground coal mining faces according to claim 1, characterized in that, A valve assembly (203) is embedded in the outer surface of the movable column (2).

5. The multi-sealed single hydraulic prop for roof support in underground coal mining faces according to claim 1, characterized in that, The upper surface of the first half hoop (301) is provided with a insertion hole (304), and the insertion hole (304) and the insertion rod (405) are inserted into it.

6. The multi-sealed single hydraulic prop for roof support in underground coal mining faces according to claim 1, characterized in that, Both ends of the corrugated pipe (5) are fixedly connected to flanges (501), and the flanges (501) are matched with the second half-hoop (401) and the first half-hoop (301).

7. The multi-sealed single hydraulic prop for roof support in underground coal mining faces according to claim 1, characterized in that, The connecting rod (303) passes through the guide plate (406) and is slidably connected to the guide plate (406). Both ends of the connecting rod (303) are fixedly connected with threaded columns. The connecting rod (303) is fixedly connected through the threaded columns and the hinged column (302).

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