Hydraulic support adjusting and moving device for coal mine underground roadway

Abstract

The hydraulic support adjusting and moving device comprises a main arm beam (1), a direction adjusting fixed pulley (2) and a long chain (3), a power oil cylinder (10) and a main arm sliding rail (13) are arranged on the main arm beam (1), and a main arm sliding block (12) embedded in the main arm sliding rail (13) is installed at the power output end of the power oil cylinder (10). The power output end of the power oil cylinder (10) can drive the main arm sliding block (12) to linearly reciprocate on the main arm sliding rail (13). The direction adjusting fixed pulley (2) used for changing the direction of pulling force is arranged on the inner side of the main arm beam (1) and is close to a cylinder body of the power oil cylinder (10), and the long chain (3) bypassing the direction adjusting fixed pulley (2) can pull out the to-be-withdrawn support (7) when the power output end of the power oil cylinder (10) extends out. The hydraulic support withdrawing device can reasonably utilize the pulleys to achieve guiding, range extending and force increasing, is good in flexibility and is suitable for withdrawing various hydraulic supports.

Description

Technical Field

[0001] This invention belongs to the field of mining equipment technology, specifically a hydraulic support adjustment device for underground coal mine roadways. Background Technology

[0002] After the mining work at a working face is completed, the hydraulic supports, which were arranged laterally and closely along the roadway before mining for roof support, need to be pulled out from the arrangement from the inside out and then transported out of the working face by transportation equipment (monorail crane, flatbed car, rubber-tired car, etc.). This process is repeated until all hydraulic supports are removed. To solve the problem of removing hydraulic supports, hydraulic support relocation devices have been developed.

[0003] Existing equipment, such as the folding and adjusting platform shown in patent publication number CN209976565U, involves a folding and adjusting platform that is rotatably connected to a guide platform via a guide member. The guide platform is detachably connected to a pulling platform. A limit component is installed on the pulling platform to prevent the hydraulic support from falling off when being pulled onto it. A rotating shaft is provided between the guide plate, the lifting and turning platform, and the pulling platform. An anti-torsion device is installed on the side of the pulling platform closest to the hydraulic support. The pulling device drags the hydraulic support along the guide plate to the lifting and turning platform, and then from the lifting and turning platform forward to the pulling platform, ready to be delivered to a retraction forklift.

[0004] Another example is a coal mine underground directional platform with a track-type hydraulic lifting arm structure, as shown in patent publication number CN119878265A. This platform consists of modular folding structure platform units arranged in an "L" shape, along with a support transport mechanism. The platform units are arranged in an "L" shape in the order of a guide frame platform, a transition platform, a steering platform, and a loading platform. The guide frame platform, transition platform, steering platform, and loading platform are hinged to each other, and can be folded towards the steering platform. The support transport mechanism is located on the loading platform and includes a flatbed truck and a hydraulic lifting mechanism. The flatbed truck can travel on the loading platform.

[0005] Both of the aforementioned devices employ an L-shaped design with a ramp. They use multi-part hinged joints to pull the hydraulic support to be removed from the roadway support array. Movement relies on the self-movement of the lateral shield support and requires significant thrust. Furthermore, these devices are complex in structure and relatively large in size, generally suitable for large hydraulic supports, and have high requirements for the condition of the working face floor and the slope. Summary of the Invention

[0006] The purpose of this invention is to address the problems existing in the prior art by providing a hydraulic support adjustment device for underground coal mine roadways.

[0007] The objective of this invention is achieved through the following technical solution:

[0008] A hydraulic support adjustment device for underground coal mine roadways is characterized in that: the hydraulic support adjustment device includes an I-shaped main boom beam, a directional pulley, and a long chain; a power cylinder and a main boom slide rail are installed on the main boom beam; a main boom slider embedded in the main boom slide rail is installed at the power output end of the power cylinder, and the power output end of the power cylinder can drive the main boom slider to move linearly back and forth on the main boom slide rail; the directional pulley for changing the direction of the pulling force is arranged on the inner side of the main boom beam and adjacent to the cylinder body of the power cylinder; the long chain passing around the directional pulley can pull out the support to be removed when the power output end of the power cylinder extends.

[0009] The tail end of the main boom slider is connected to the power output end of the power cylinder via a pin mounting seat, and the tail end of the power cylinder body is connected to the power cylinder seat fixedly installed on the top of the main boom beam via a pin.

[0010] The main boom beam has a main boom connecting seat at its end. The main boom connecting seat is connected to the telescopic push-pull cylinder at the bottom of the shield hydraulic support through a one-step crossbeam, so that the entire hydraulic support adjustment device can move with the shield hydraulic support. The main boom connecting seat is mounted on the one-step crossbeam through a pin.

[0011] The inner side of the main boom beam is provided with a side support sleeve. The two ends of the side support sleeve are respectively connected to the middle part of the main boom beam and the one-step crossbeam used to support and position the main boom beam through a pin and pin seat assembly.

[0012] A bottom jack is installed below the main boom beam. The bottom jack is located inside the main boom slide rail and is close to the cylinder body of the power cylinder. The bottom jack can lift the inner side of the main boom beam, so that the main boom beam can rotate 0-20° relative to the working surface floor.

[0013] The directional pulley is installed on the top of the pulley seat, and the pulley seat located next to the cylinder body of the power cylinder is fixedly installed on the inner side of the main boom beam.

[0014] The main boom slider is equipped with a main boom movable pulley, and a main boom hook is arranged on the main boom beam outside the main boom slide rail. A long chain with one end fixedly connected to the main boom hook passes through the main boom movable pulley and the directional fixed pulley in sequence, and the other end of the long chain is fixedly connected to the support to be removed.

[0015] The main arm slider is provided with a slider handle, which is used to fix one end of the long chain and the other end of the long chain passes around the main arm movable pulley and the directional fixed pulley on the main arm slider and is then fixedly connected to the support to be removed, or the other end of the long chain passes around the directional fixed pulley alone and is then fixedly connected to the support to be removed.

[0016] The hydraulic support adjustment device includes a cantilever beam capable of rotating 0-90° relative to the main boom beam. A swivel arm slide rail and a swivel arm hook are arranged on the cantilever beam. A swivel arm movable pulley is arranged in the swivel arm slider embedded in the swivel arm slide rail, and a slider pin seat is arranged at the end of the swivel arm slider. The slider pin seat is fixedly connected to the support to be removed through a short chain. The swivel arm hook is arranged on the outer side of one end of the swivel arm slide rail near the rotating end of the cantilever beam. One end of a long chain is fixedly connected to the swivel arm hook. Then, the other end of the long chain passes through the swivel arm movable pulley and the directional fixed pulley in sequence and is connected to the main boom slider. Alternatively, the other end of the long chain passes through the swivel arm movable pulley, the directional fixed pulley, and the main boom movable pulley on the main boom slider in sequence and is connected to the main boom hook arranged on the main boom beam.

[0017] The rotating end of the cantilever beam is installed in the inner cavity of the main boom beam away from the main boom slide rail via a pin, and the protruding steering cantilever of the rotating end of the cantilever beam is connected to the power output end of the rotary cylinder via a pin. The tail of the rotary cylinder body is connected to the rotary cylinder seat fixedly installed in the inner cavity of the main boom beam via a pin. When the power output end of the rotary cylinder extends, it can drive the cantilever beam to rotate 0-90°. When the power output end of the rotary cylinder retracts completely, it can keep the combined structure of the main boom beam and the cantilever beam in an I-shape.

[0018] The inner side of the main boom beam is provided with a cantilever beam positioning pin seat that limits the rotation angle of the cantilever beam; the cantilever beam positioning pin seat is installed on the extension plate at the bottom of the outer side of the fixed pulley seat.

[0019] The present invention has the following advantages over the prior art:

[0020] The hydraulic support adjustment device provided by this invention can make reasonable use of pulleys to achieve guidance, stroke extension and force increase, with good flexibility and is suitable for the withdrawal of various hydraulic supports; it has a lifting mechanism, which can flexibly adjust to special situations such as excessive pressure on the top of the hydraulic support or uneven roadway floor, so as to optimize the force on the hydraulic support.

[0021] The hydraulic support adjustment device provided by this invention has an I-shaped structure along the direction of passage when installed. It has a simple structure and small size, which can effectively reduce the occupation of the passage width and is suitable for most working face environments. Attached Figure Description

[0022] Appendix Figure 1 This is one of the structural schematic diagrams of the hydraulic support adjustment device provided by the present invention;

[0023] Appendix Figure 2 This is the second schematic diagram of the structure of the hydraulic support adjustment device provided by the present invention;

[0024] Appendix Figure 3 This is a schematic diagram of the working state of the hydraulic support adjustment device provided in Embodiment 1 of the present invention;

[0025] Appendix Figure 4 This is a schematic diagram of the working state of the hydraulic support adjustment device provided in Embodiment 2 of the present invention;

[0026] Appendix Figure 5 This is a schematic diagram of the working state of the hydraulic support adjustment device provided in Embodiment 3 of the present invention;

[0027] Appendix Figure 6 A schematic diagram of the structure of the hydraulic support adjustment device provided by the present invention when installed on a protective hydraulic support.

[0028] Wherein: 1—Main boom beam; 10—Power cylinder; 11—Power cylinder seat; 12—Main boom slider; 120—Main boom pulley; 121—Slider handle; 13—Main boom slide rail; 14—Main boom connecting seat; 15—Main boom hook;

[0029] 2—Adjustable pulley; 20—Pulley seat; 21—Cantilever beam positioning pin seat;

[0030] 3—Long chain; 30—Short chain;

[0031] 4—Swing arm beam; 40—Rotary cylinder; 41—Rotary cylinder seat; 42—Steering arm; 43—Swing arm slider; 430—Swing arm movable pulley; 431—Slider pin seat; 44—Swing arm slide rail; 45—Swing arm hook;

[0032] 5—Side support sleeve; 6—Bottom jack; 7—Support to be removed; 8—Covering hydraulic support; 9—One-step crossbeam. Detailed Implementation

[0033] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that the invention will be thorough and complete, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0034] The terms “a,” “one,” “the,” and “the” are used to indicate the existence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended meaning of inclusion and that other elements / components / etc. may exist in addition to the listed elements / components / etc.

[0035] like Figure 1-6The diagram shows a hydraulic support adjustment device for underground coal mine roadways. This device includes an I-shaped main boom beam 1, a directional pulley 2, a long chain 3, a swivel beam 4, side support sleeves 5, and a bottom jack 6. The main boom beam 1, directional pulley 2, and long chain 3 form the main structure; their combination can pull out a light hydraulic support of approximately 20 tons and a medium-weight hydraulic support of approximately 40 tons. The swivel beam 4 is a reinforcing structure; the combination of the main boom beam 1, directional pulley 2, long chain 3, and swivel beam 4 can pull out a heavy hydraulic support of approximately 60 tons or a medium-weight hydraulic support with excessive top pressure. The support frame, a lightweight support frame; the side support sleeve 5 provides lateral support to the main boom beam 1, effectively shortening the lever arm of the main boom beam 1 due to the reaction force perpendicular to the direction of the support to be removed 7 caused by the long chain 3 passing through, thereby reducing the torque and protecting the frame of the main boom beam 1; the bottom jack 6, combined with the pin shaft rotation structure at the end of the main boom beam 1, can make the main boom beam 1 form an angle of up to 20° with the working surface bottom plate. When the hydraulic support adjustment device pulls the bottom recessed support to be removed 7, it tilts the hydraulic support adjustment device away from the support to be removed 7, which can improve the stability of the hydraulic support adjustment device and increase the effective force on the support to be removed 7.

[0036] like Figure 1-5 The hydraulic support adjustment device shown has a power cylinder 10 and a main boom slide rail 13 installed on the main boom beam 1. The tail end of the cylinder body of the power cylinder 10 is connected to the power cylinder seat 11 fixedly installed on the top of the main boom beam 1 by a pin. The tail end of the main boom slider 12, which is embedded in the main boom slide rail 13, is connected to the power output end of the power cylinder 10 by a pin mounting seat. The power output end of the power cylinder 10 can drive the main boom slider 12 to move back and forth linearly on the main boom slide rail 13. The directional pulley 2 used to change the direction of the pulling force is installed on the top of the directional pulley seat 20. The directional pulley seat 20 located next to the cylinder body of the power cylinder 10 is fixedly installed on the inner side of the main boom beam 1. The long chain 3 passing around the directional pulley 2 can pull out the support 7 to be removed when the power output end of the power cylinder 10 is extended.

[0037] like Figure 1-6 As shown, a main boom connecting seat 14 is arranged at the end of the main boom beam 1. The main boom connecting seat 14 is mounted on the one-step crossbeam 9 via a pin, and the one-step crossbeam 9 is connected to the telescopic push-slide cylinder at the bottom of the shield hydraulic support 8, so that the entire hydraulic support adjustment device can move with the shield hydraulic support. The side support sleeve 5 is arranged on the inner side of the main boom beam 1. The two ends of the side support sleeve 5 are connected to the middle of the main boom beam 1 and the one-step crossbeam 9 used to support and position the main boom beam 1 via pin and pin seat assemblies, respectively. The bottom jack 6 is arranged below the main boom beam 1. The bottom jack 6 is located on the inner side of the main boom slide rail 13 and is close to the cylinder body of the power cylinder 10. The bottom jack 6 can lift the inner side of the main boom beam 1, so that the main boom beam 1 can rotate 0-20° relative to the working surface floor.

[0038] Furthermore, a main boom movable pulley 120 is provided on the main boom slider 12, and a main boom hook 15 is arranged on the main boom beam 1 outside the main boom slide rail 13. A long chain 3, one end of which is fixedly connected to the main boom hook 15, passes through the main boom movable pulley 120 and the directional fixed pulley 2 in sequence, and the other end of the long chain 3 is fixedly connected to the support 7 to be removed.

[0039] Furthermore, a slider handle 121 is provided on the main arm slider 12. The slider handle 121 is used to fix one end of the long chain 3 and the other end of the long chain 3 passes around the main arm movable pulley 120 and the directional fixed pulley 2 on the main arm slider 12 and is fixedly connected to the support to be removed 7, or the other end of the long chain 3 passes around the directional fixed pulley 2 and is fixedly connected to the support to be removed 7.

[0040] Furthermore, the hydraulic support adjustment device includes a cantilever beam 4 capable of rotating 0-90° relative to the main boom beam 1. The rotating end of the cantilever beam 4 is mounted in the inner cavity of the main boom beam 1 at the end away from the main boom slide rail 13 via a pin. The protruding steering cantilever 42 at the rotating end of the cantilever beam 4 is connected to the power output end of the rotary cylinder 40 via a pin. The tail of the cylinder body of the rotary cylinder 40 is connected to the rotary cylinder seat 41 fixedly installed in the inner cavity of the main boom beam 1 via a pin. When the power output end of the rotary cylinder 40 extends, it can drive the cantilever beam 4 to rotate clockwise 0-90°. When the power output end of the rotary cylinder 40 retracts completely, it can maintain the I-shaped structure of the combined structure of the main boom beam 1 and the cantilever beam 4. A rotary arm slide rail 44 and a rotary arm slide rail are arranged on the cantilever beam 4. The arm hook 45 is embedded in the arm slider 43 on the arm slide rail 44, and the arm movable pulley 430 is arranged in the arm movable pulley 43. The end of the arm movable pulley 43 is arranged with a slider pin seat 431. The slider pin seat 431 is fixedly connected to the bracket to be removed 7 through a short chain 30. The arm hook 45 is arranged on the outer side of one end of the arm slide rail 44 near the rotating end of the cantilever beam 4. One end of the long chain 3 is fixedly connected to the arm hook 45. Then, the other end of the long chain 3 passes through the arm movable pulley 430 and the directional fixed pulley 2 in sequence and is connected to the main arm slider 12. Alternatively, the other end of the long chain 3 passes through the arm movable pulley 430, the directional fixed pulley 2 and the main arm movable pulley 120 on the main arm slider 12 in sequence and is connected to the main arm hook 15 arranged on the main arm beam 1.

[0041] Additionally, a cantilever beam positioning pin seat 21 is arranged on the inner side of the main beam 1 to limit the rotation angle of the cantilever beam 4. The cantilever beam positioning pin seat 21 is installed on the extension plate at the bottom of the outer side of the fixed pulley seat 20.

[0042] In the hydraulic support adjustment device provided by this invention, the pulleys, pins, etc., are all made of 40Cr tempered material to meet strength requirements; the chain uses a φ22 or φ26 round link chain; and the main boom beam cylinder is selected with a specification of φ160-1500. Under any working conditions, all pulleys are ensured to be on the same plane to avoid chain jamming and additional stress caused by height differences between pulleys.

[0043] Example 1

[0044] One end of the long chain 3 is connected to the bracket 7 to be removed, and the other end of the long chain 3 is connected to... Figure 3 The slider handle 121 on the main boom slider 12 is connected and the direction of force is changed midway via the directional pulley 2. Then, the power cylinder 10 (stroke L) pushes the main boom slider 12 to move along the setting direction of the main boom slide rail 13, and the support 7 to be relocated is pulled out via the directional pulley 2 and the long chain 3. The hydraulic support relocation device provided in this embodiment can pull the support 7 to be relocated a distance L of the power cylinder 10 in a single push, and its working state is suitable for medium-weight hydraulic supports (about 40 tons).

[0045] Example 2

[0046] One end of a long chain 3 is connected to the support 7 to be retracted, and the other end of the long chain 3 is fixed to the main boom hook 15. The chain passes through the main boom movable pulley 120 on the main boom slider 12 to multiply the stroke, and changes the direction of force via the adjusting pulley 2. Then, the power cylinder 10 (stroke L) pushes the main boom slider 12 to move along the direction of the main boom slide rail 13, pulling the support 7 to be retracted out via the adjusting pulley 2 and the long chain 3. The hydraulic support retraction device provided in this embodiment can pull the support 7 to be retracted out a distance of 2L from the power cylinder 10 in a single push, and its working state is suitable for light hydraulic supports (around 20 tons).

[0047] Example 3

[0048] First, control the slewing beam 4 to rotate 90°. One end of the short chain 31 is connected to the support 7 to be removed, and the other end is connected to the slider pin seat 431. One end of the long chain 3 is fixed at the slewing hook 45, and passes through the slewing movable pulley 430, the adjusting fixed pulley 2, and the main boom movable pulley 120 in sequence, finally fixing the other end to the main boom hook 15. Then, the power cylinder 10 (stroke L) pushes the main boom slider 12 to move along the setting direction of the main boom slide rail 13, and pulls out the support 7 to be removed through the transmission of the main boom movable pulley 120, the adjusting fixed pulley 2, the slewing movable pulley 430, the long chain 3, and the short chain 31. The hydraulic support adjustment device provided in this embodiment can pull the support 7 to be removed out a distance of about 0.5L from the power cylinder 10 in a single push. This working state is suitable for heavy hydraulic supports of about 60 tons or medium and light supports with excessive top pressure.

[0049] The three operating states of the hydraulic support adjustment device provided in the above three embodiments all rely on the power cylinder 10, the main boom slider 12, and the directional pulley 2 on the main boom beam 1. The long chain 3 or short chain 30 connected to the support 7 to be removed needs to pass through the directional pulley 2 to transmit force and change the direction of force transmission. The power cylinder 10 on the main boom beam 1 has a main boom slider 12 equipped with a main boom slide rail 13 at its front end. A main boom movable pulley 120 passes through the center of the main boom slider 12, and a slider handle 121 is fixed to the outer frame of the main boom slider 12. The long chain 3 can pass through the main boom movable pulley 120 or be attached to the slider handle 121. All three operating states are achieved through the slider-rail structure composed of the main boom slider 12 and the main boom slide rail 13. The cantilever beam 4 is installed at the front end of the main boom beam 1 via a pivot or pin. In the working condition provided in Embodiment 3, the cantilever beam 4 is rotated 90° and fixed, and the pull of the support 7 to be removed is achieved by the combination of the long chain 3 and the short chain 30. In other working conditions, the cantilever beam 4 remains vertical to the main boom beam 1.

[0050] like Figure 6 As shown, the hydraulic support adjustment device provided by the present invention is installed on the cover hydraulic support 8. The hydraulic support adjustment device is connected to the telescopic push cylinder at the bottom of the cover hydraulic support 8 through a one-step crossbeam as a supporting component, so that the push cylinder can adjust the position of the main boom beam 1 relative to the cover hydraulic support 8. While fixing the hydraulic support adjustment device provided by the present invention, forward and backward movement can be achieved by adjusting the telescopic movement of the push cylinder of the cover support 8, thus having a certain mobility.

[0051] In this embodiment of the invention, the term "multiple" refers to two or more, unless otherwise explicitly defined. The terms "install," "connect," and "fix" should be interpreted broadly. For example, "connect" can mean a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention based on the specific circumstances.

[0052] In the description of the embodiments of the present invention, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0053] In the description of this specification, the terms "an embodiment," "a preferred embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0054] The above embodiments are merely illustrative of the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solutions based on the technical concept proposed in this invention shall fall within the scope of protection of this invention. Technologies not covered in this invention can be implemented using existing technologies.

Claims

1. A hydraulic support adjustment device for underground coal mine roadways, characterized in that: The hydraulic support adjustment device includes an I-shaped main boom beam (1), a directional pulley (2), and a long chain (3). A power cylinder (10) and a main boom slide rail (13) are installed on the main boom beam (1). The main boom slider (12) embedded in the main boom slide rail (13) is installed at the power output end of the power cylinder (10). The power output end of the power cylinder (10) can drive the main boom slider (12) to move back and forth in a straight line on the main boom slide rail (13). The directional pulley (2) used to change the direction of the pulling force is arranged on the inner side of the main boom beam (1) and is located near the cylinder body of the power cylinder (10). The long chain (3) passing around the directional pulley (2) can pull out the support (7) to be removed when the power output end of the power cylinder (10) is extended. The tail end of the main boom slider (12) is connected to the power output end of the power cylinder (10) through a pin mounting seat, and the tail of the cylinder body of the power cylinder (10) is connected to the power cylinder seat (11) fixedly installed on the top of the main boom beam (1) through a pin.

2. The hydraulic support adjustment device for underground coal mine roadways according to claim 1, characterized in that: The main boom beam (1) is provided with a main boom connecting seat (14) at its end. The main boom connecting seat (14) is connected to the telescopic push-pull cylinder at the bottom of the shield hydraulic support (8) through a one-step crossbeam (9), so that the push-pull cylinder can adjust the position of the main boom beam (1) relative to the shield hydraulic support (8). The main boom connecting seat (14) is installed on the one-step crossbeam (9) through a pin.

3. The hydraulic support adjustment device for underground coal mine roadways according to claim 1, characterized in that: The inner side of the main boom beam (1) is provided with a side support sleeve (5). The two ends of the side support sleeve (5) are respectively connected to the middle part of the main boom beam (1) and the one-step crossbeam (9) used to support and position the main boom beam (1) through the pin shaft and pin seat assembly.

4. The hydraulic support adjustment device for underground coal mine roadways according to claim 1, characterized in that: A bottom jack (6) is provided below the main boom beam (1). The bottom jack (6) is located inside the main boom slide rail (13) and is located near the cylinder body of the power cylinder (10). The bottom jack (6) can lift the inner side of the main boom beam (1) so that the main boom beam (1) can rotate 0-20° relative to the working surface floor.

5. The hydraulic support adjustment device for underground coal mine roadways according to claim 1, characterized in that: The directional pulley (2) is installed on the top of the pulley seat (20), and the pulley seat (20) located next to the cylinder body of the power cylinder (10) is fixedly installed on the inner side of the main boom beam (1).

6. The hydraulic support adjustment device for underground coal mine roadways according to any one of claims 1-5, characterized in that: The main boom slider (12) is provided with a main boom movable pulley (120) and a main boom hook (15) is arranged on the main boom beam (1) outside the main boom slide rail (13). A long chain (3) with one end fixedly connected to the main boom hook (15) passes around the main boom movable pulley (120) and the directional fixed pulley (2) in sequence, and the other end of the long chain (3) is fixedly connected to the bracket to be removed (7).

7. The hydraulic support adjustment device for underground coal mine roadways according to any one of claims 1-5, characterized in that: The main arm slider (12) is provided with a slider handle (121). The slider handle (121) is used to fix one end of the long chain (3) and the other end of the long chain (3) passes around the main arm movable pulley (120) and the directional fixed pulley (2) on the main arm slider (12) and is fixedly connected to the support to be removed (7), or the other end of the long chain (3) passes around the directional fixed pulley (2) and is fixedly connected to the support to be removed (7).

8. The hydraulic support adjustment device for underground coal mine roadways according to any one of claims 1-5, characterized in that: The hydraulic support adjustment device includes a cantilever beam (4) capable of rotating 0-90° relative to the main boom beam (1). A swivel arm slide rail (44) and a swivel arm hook (45) are arranged on the cantilever beam (4). A swivel arm movable pulley (430) is arranged in the swivel arm slider (43) embedded in the swivel arm slide rail (44), and a slider pin seat (431) is arranged at the end of the swivel arm slider (43). The slider pin seat (431) is fixedly connected to the support to be removed (7) by a short chain (30). A swivel arm is arranged on the outer side of one end of the swivel arm slide rail (44). The arm hook (45) is located near the rotating end of the cantilever beam (4). One end of the long chain (3) is fixedly connected to the arm hook (45). Then, the other end of the long chain (3) passes through the arm movable pulley (430) and the directional fixed pulley (2) in sequence and is connected to the main arm slider (12). Alternatively, the other end of the long chain (3) passes through the arm movable pulley (430), the directional fixed pulley (2), and the main arm movable pulley (120) on the main arm slider (12) in sequence and is connected to the main arm hook (15) arranged on the main arm beam (1).

9. The hydraulic support adjustment device for underground coal mine roadways according to claim 8, characterized in that: The rotating end of the cantilever beam (4) is installed in the inner cavity of the main boom beam (1) away from the main boom slide rail (13) by a pin, and the steering cantilever (42) protruding from the rotating end of the cantilever beam (4) is connected to the power output end of the rotary cylinder (40) by a pin. The tail of the cylinder body of the rotary cylinder (40) is connected to the rotary cylinder seat (41) fixedly installed in the inner cavity of the main boom beam (1) by a pin. When the power output end of the rotary cylinder (40) extends, it can drive the cantilever beam (4) to rotate 0-90°. After the power output end of the rotary cylinder (40) retracts completely, it can keep the combined structure of the main boom beam (1) and the cantilever beam (4) in an I-type structure.

10. The hydraulic support adjustment device for underground coal mine roadways according to claim 8, characterized in that: The inner side of the main boom beam (1) is provided with a cantilever beam positioning pin seat (21) that limits the rotation angle of the cantilever beam (4); the cantilever beam positioning pin seat (21) is installed on the extension plate at the bottom of the outer side of the fixed pulley seat (20).

Images