Suspension rail reciprocating type forepoling device

Abstract

The utility model relates to the technical field of coal mine underground supporting equipment, in particular to a suspension rail reciprocating type advance supporting device. The device comprises a front basic frame, a lifting trolley, a forepoling support, a rear basic frame and a suspension rail, the forepoling support is formed by arranging middle frames and located between the front basic frame and the rear basic frame, and the suspension rail is a single rail connected in a segmented telescopic mode and arranged between the front basic frame and the rear basic frame in the horizontal direction. The lifting trolley is mounted on the suspension rail, the middle frame is used for reciprocating transportation, the front compensation rail on the front basic frame is in butt joint with the lifting trolley rail on the foremost middle frame, and the rear compensation rail on the rear basic frame is in butt joint with the lifting trolley rail on the rearmost middle frame. According to the utility model, by adopting the suspension rail reciprocating design and matching with the lifting trolley, the problems of low driving efficiency, poor supporting adaptability and weak collaborative operation capability in the prior art are effectively solved.

Description

Technical Field

[0001] This utility model relates to the technical field of underground support equipment in coal mines, specifically a suspended rail reciprocating advance support device, which is mainly applicable to underground roadway excavation and coal mining operations in the coal industry, especially for advance support of fully mechanized mining faces. Background Technology

[0002] Advanced support systems are crucial equipment primarily used for roof support in haulage roadways and return airways of fully mechanized coal mine faces, preventing roof collapse. Currently, advanced support technologies both domestically and internationally are mainly categorized as follows:

[0003] (1) Single hydraulic prop support

[0004] The use of single hydraulic props in conjunction with articulated roof beams or I-beams for support is simple in structure, low in cost, and highly adaptable. However, it requires manual handling, erection, and retrieval of the props, resulting in high labor intensity. As the working face advances, the props need to be repeatedly moved, affecting coal mining efficiency and leading to low support efficiency. Workers must operate in unsupported areas, increasing the risk of roof collapse and posing a safety hazard.

[0005] (2) Stepping-type advanced support hydraulic support

[0006] It employs a hydraulic support structure, moving forward through alternating steps. It boasts a high degree of mechanization, reducing manual intervention and providing strong support, making it suitable for high-stress roadways. However, it requires repeated roof support, and the process of lowering, moving, and raising the support pillars can easily cause roof breakage. Some supports cannot be lowered into the mine as a whole and require underground assembly. For example:

[0007] Patent CN111852531A discloses a hydraulic support for tunnel pre-support, employing double-moving frame jacks, pushing supports, fixed roof beams, wall panels, and rigid connections between frames. This hydraulic support is mainly suitable for longwall mining faces, but it has certain limitations in meeting the diverse needs of pre-support in fully mechanized mining faces, and its adaptability to different geological conditions and mining processes is not strong enough. While the double-moving frame jacks enable the support to move, they may cause some disturbance to the roof during the movement, affecting its stability.

[0008] Patent CN111255496A discloses a coal pillar-assisted mine pre-support device and its usage method. It employs a coal pillar support, a cutting roller, a stepping pushing mechanism, and a support mechanism that move forward in stages. The roof support relies on the presence of the coal pillar. When the coal pillar conditions are unfavorable, the support stability is significantly affected, posing certain safety hazards. The movement and adjustment of the support device need to be coordinated with the tunneling machine's operation. For standalone pre-support operations, it lacks flexibility and is difficult to quickly adapt to changes in the working face.

[0009] (3) Suspended rail type advanced support device

[0010] Using a monorail or cantilever beam structure, the support frame moves along the track, reducing repeated support of the roof slab. The entire support frame is moved, minimizing damage to the roof slab and avoiding repeated support. However, simply lifting the support frame does not solve the problem of overall relocation. For example:

[0011] Patent CN102383815A discloses a suspended temporary support device for roadway excavation and its usage method. It adopts I-beam suspension beams, hydraulic cylinder drive, and fixed lifting platform support. The stability and reliability of this temporary support device in steep roadways or complex geological conditions need to be improved. It is suspended on the roadway roof by I-beam suspension beams. For roadways with poor roof conditions or undulations, it may not be able to maintain stable support. It is mainly concentrated near the roadway excavation face and cannot effectively cover the large area of ​​roof support required for advance support.

[0012] Patent CN110578543A discloses a suspended rail wing-type support platform. It employs a variable-amplitude hydraulic cylinder to drive the wing-type support frame's lifting and lowering, relies on the suspended rail platform for passive movement, and uses support cylinders to fold the side wing supports. However, it has poor adaptability to pre-support in roadways. It is mainly used for mesh support, hoisting, and transportation during roadway excavation, and does not adequately consider the specific requirements of pre-support in fully mechanized mining faces, such as long-term stable roof support and adaptation to mining-induced impacts. Furthermore, it has shortcomings in support strength and stability. This support platform mainly relies on the wing-type support frame contacting the roadway roof for support; in situations with a fractured roof or high pressure, the support effect may be insufficient.

[0013] Patent CN216198209U discloses a pre-support device for coal mine roadways based on a monorail. The device consists of a monorail with tracks on both outer walls and two suspension anchors fixedly connected to the top outer wall of the monorail. Connecting plates are welded to the outer walls at both ends of the monorail's top. One end of the monorail has two moving mechanisms, each consisting of two wheels that are rolled within the tracks on either side of the monorail. This device primarily provides support via the monorail and hydraulic cylinders. However, for roadways with high roof pressure, the support strength may be insufficient. Utility Model Content

[0014] In order to solve the technical problems existing in the prior art, the purpose of this utility model is to provide a suspended rail reciprocating advanced support device and its usage method. By adopting a suspended rail reciprocating design and cooperating with a hoisting trolley, it effectively solves the problems of low driving efficiency, poor support adaptability and weak collaborative operation capability in the prior art. It can flexibly adjust the support position according to the roadway conditions and roof conditions to achieve stable support for the roof and is suitable for a variety of complex geological conditions.

[0015] The technical solution of this utility model is:

[0016] A reciprocating pre-support device with suspension rails includes a front base frame, a hoisting trolley, a pre-support bracket, a rear base frame, and suspension rails. The pre-support brackets are formed by intermediate frames arranged between the front and rear base frames. The suspension rails are segmented telescopically connected single rails arranged horizontally between the front and rear base frames. The hoisting trolley is mounted on the suspension rails and is an intermediate frame used for reciprocating transport. The front compensation rail on the front base frame is connected to the hoisting trolley rail on the foremost intermediate frame, and the rear compensation rail on the rear base frame is connected to the hoisting trolley rail on the rearmost intermediate frame.

[0017] The aforementioned reciprocating anti-slip support device has two states for each intermediate frame: one is working state A, where the top beam extends upward to provide support, and the other is movable state B, where the top beam retracts downward in preparation for reciprocating transport via a hoisting trolley.

[0018] The aforementioned reciprocating suspension support device includes a hoisting trolley comprising a first pin, a brake arm, a second pin, a frame, a first drive unit, a third pin, a rotary reducer, a motor, a second drive unit, a brake wheel, a brake pin, a brake shaft, and a spring. The specific structure is as follows:

[0019] The first drive unit and the second drive unit are symmetrically installed on the frame. The first drive unit and the second drive unit are set on both sides of the hoisting trolley track by rollers. The motor output shaft is connected to the input shaft of the rotary reducer through a coupling. The power is transmitted to the first drive unit and the second drive unit by the output shaft of the rotary reducer after passing through the rotary reducer. Brake arms are symmetrically arranged on both sides of the frame. Each brake arm is equipped with a first pin, a second pin, and a third pin from top to bottom. The brake arm swings around the second pin located in the middle. The first pin located at the top is hinged to one end of the brake shaft. The other end of the brake shaft is equipped with a brake wheel through a brake pin. The brake wheel corresponds to the side of the hoisting trolley track. The third pins of the two brake arms are connected by a spring.

[0020] The aforementioned suspended rail reciprocating advanced support device has a hanger installed at the bottom of the frame, and the hoisting trolley is connected to the intermediate frame through the hanger.

[0021] The aforementioned reciprocating suspension rail advanced support device includes a rear basic frame comprising a rear track telescopic mechanism, a top-mounted crossbeam, a first top-mounted column, a top-mounted column lifting cylinder, a second top-mounted column, a top beam, a rear compensating track, a top beam lifting cylinder, a telescopic column, a track assembly, and a basic frame base. The specific structure is as follows:

[0022] Two basic frame bases are symmetrically arranged, and each basic frame base is mounted on the track assembly. Two parallel telescopic columns are installed in the middle of each basic frame base. The upper end of the telescopic column is connected to the top beam, and the lower end of the telescopic column is in sliding fit with the middle of the basic frame base. A top beam lifting cylinder is installed vertically between the two telescopic columns. The lower end of the top beam lifting cylinder is connected to the basic frame base, and the upper end of the top beam lifting cylinder is connected to the top beam. Top-connecting columns are installed at the four corners of the top of the top beam through top-connecting column lifting cylinders. Top-connecting crossbeams are installed at the top of the two first top-connecting columns and the two second top-connecting columns. The rear track telescopic mechanism passes through the top beam in the horizontal direction, and a rear compensation track is installed at one end of the rear track telescopic mechanism.

[0023] The aforementioned reciprocating suspension support device has a top-mounted tail beam installed on one side of each base frame via a top-mounted cylinder. The two top-mounted tail beams correspond to each other, with one end of the top-mounted tail beam hinged to the top beam. The lower end of the top-mounted cylinder is connected to the base frame, and the upper end of the top-mounted cylinder is hinged to the middle of the top-mounted tail beam.

[0024] The aforementioned reciprocating suspension support device includes a hoisting trolley track, chain, side top beam, side top beam telescopic sleeve, intermediate top beam, base, column jack, side top beam telescopic cylinder, and cylinder liner in the intermediate frame. The specific structure is as follows:

[0025] Two opposing bases are each equipped with a column jack. A side top beam is installed on the upper end of each column jack. One side top beam has cylinder liners installed parallel to each other on one side, and the two cylinder liners slide in fit with one side of the side top beam telescopic sleeve. The other side top beam has cylinder liners installed parallel to each other on one side, and the two cylinder liners slide in fit with the other side of the side top beam telescopic sleeve. A middle top beam is installed in the middle of the side top beam telescopic sleeve. A side top beam telescopic cylinder is installed between each pair of parallel cylinder liners. The two ends of the side top beam telescopic cylinder are connected to the corresponding side top beam and the middle top beam, respectively. A hoisting trolley track is installed below the middle top beam via a chain.

[0026] The design concept of this utility model is mainly reflected in the following aspects:

[0027] Traditional underground support devices in coal mines suffer from low efficiency and inflexible adjustment during movement, especially in the advanced support of fully mechanized mining faces, where frequent movement and adjustments place higher demands on support efficiency and safety. This invention employs a suspended rail reciprocating design, achieving efficient reciprocating movement of the support device through the cooperation of segmented telescopic suspended rails and a hoisting trolley. This design not only improves the moving speed of the support device but also enables flexible adjustment of the support device between different positions through precise control of the hoisting trolley. The suspended rail adopts a segmented telescopic structure, allowing for flexible adjustment of the track length according to the roadway length and support requirements, ensuring smooth movement of the hoisting trolley on the track. The hoisting trolley, driven by a hydraulic motor and a rotary reducer, efficiently transports the intermediate frame from the rear basic frame to the front basic frame, while also being equipped with a braking device to ensure safety during movement.

[0028] The geological conditions of underground coal mine roadways are complex and variable, with the height, width, and inclination angle of the roadways potentially changing at any time, posing a challenge to the adaptability of support devices. This utility model ensures that the support device can adapt to the support needs under different roadway conditions through the flexible adjustment of the intermediate frame and the multi-functional design of the basic frame. The intermediate frame has two states: working state A (support state) and movable state B (transportation state). In working state A, the top beam of the intermediate frame extends upward, making close contact with the roadway roof to provide stable support; in movable state B, the top beam of the intermediate frame retracts downward, and the base and side top beams retract laterally, facilitating the transport of the hoisting trolley. Both the front and rear basic frames are equipped with telescopic columns, top beam lifting cylinders, and roof-connecting column lifting cylinders, which can adjust the support height according to the roadway height, and simultaneously achieve overall movement through the crawler assembly to adapt to changes in the roadway's inclination angle.

[0029] Traditional support devices may disturb the roadway roof during movement, affecting its stability and increasing the risk of roof collapse. This invention reduces direct contact and disturbance to the roof during movement by utilizing the support and guidance of a dedicated monorail. It also optimizes the structural design of the support device, improving its strength and stability. The hoisting trolley moves along the dedicated monorail, whose support and guidance ensure that the impact of the support device on the roof is minimized during movement, protecting the roof's integrity. The intermediate frame employs a double telescopic column and side roof beam telescopic cylinder design, which can adjust the support force according to the pressure and shape of the roadway roof, ensuring effective roof support and reducing roof subsidence and deformation.

[0030] The advantages and beneficial effects of this utility model are:

[0031] 1. Highly efficient mobility: This utility model support device can be quickly moved from one position to another, which greatly improves support efficiency and reduces the time spent on moving the support device, thereby improving the working efficiency of tunnel excavation or coal mining.

[0032] 2. High adaptability: The suspended rail reciprocating design of this utility model can adapt to different roadway conditions, including changes in roadway width, height, and inclination angle. By adjusting the suspension position and angle of the rail, the support device can better adapt to complex roadway environments, ensuring stable operation under various geological conditions.

[0033] 3. In underground coal mine operations, support devices need to work in coordination with equipment such as coal mining machines and scraper conveyors. However, the movement and adjustment of traditional support devices often affect overall operational efficiency. This utility model achieves rapid movement and flexible adjustment of support devices through a suspended rail reciprocating design and efficient transport by a hoisting trolley, ensuring that the support devices can work in coordination with coal mining equipment and improving the overall operational efficiency of the fully mechanized mining face. The hoisting trolley can quickly transport the intermediate frame from the rear basic frame to the front basic frame, reducing the time spent on moving the support devices and improving the efficiency of roadway excavation or coal mining. The movement and adjustment of the front and rear basic frames are matched with the operating rhythm of the coal mining machine and scraper conveyor, ensuring a smooth and efficient operation of the entire fully mechanized mining face.

[0034] 4. The hoisting trolley of this utility model is equipped with braking devices such as a brake arm, brake wheel and spring, which can quickly brake in emergency situations and ensure safety during the movement process.

[0035] 5. This utility model achieves efficient movement and flexible adjustment of the support device through the reciprocating design of the suspended rail and the efficient transportation of the hoisting trolley; it adapts to complex geological conditions through the multi-state design of the intermediate frame and the multi-functional design of the basic frame; and it reduces roof disturbance and improves support stability through the support and guidance of the monorail's dedicated track. Attached Figure Description

[0036] Figures 1-3 This is a structural schematic diagram of the suspended rail reciprocating advanced support device of this utility model. Wherein, Figure 1 Main view, Figure 2 This is a top view. Figure 3 This is a side view.

[0037] Figures 4-7 This is a structural schematic diagram of the hoisting trolley of this utility model. Wherein, Figure 4 Main view, Figure 5 This is a top view. Figure 6 This is a side view. Figure 7 for Figure 4 AA section view in the image.

[0038] Figures 8-10 This is a schematic diagram of the rear basic frame of this utility model. Wherein, Figure 8 Main view, Figure 9 This is a top view. Figure 10 for Figure 8 BB view in the middle.

[0039] Figures 11-13 This is a schematic diagram of the intermediate frame of this utility model. Wherein, Figure 11 Main view, Figure 12 This is a top view. Figure 13 This is a side view.

[0040] In the diagram, 1 is the front basic frame, 101 is the front track telescopic mechanism, and 102 is the front compensating track; 2 is the hoisting trolley, 201 is the first pin, 202 is the brake arm, 203 is the second pin, 204 is the frame body, 205 is the first drive unit, 206 is the third pin, 207 is the hanger, 208 is the rotary reducer, 209 is the motor, 210 is the second drive unit, 211 is the brake wheel, 212 is the brake pin, 213 is the brake shaft, and 214 is the spring; 3 is the intermediate frame, 301 is the hoisting trolley track, 302 is the chain, 303 is the side top beam, and 3 is the... 04 Side top beam telescopic sleeve, 305 Intermediate top beam, 306 Base, 307 Column jack, 308 Side top beam telescopic cylinder, 309 Cylinder liner; 4 Rear basic frame, 401 Rear track telescopic mechanism, 402 Tail beam connecting cylinder, 403 Connecting tail beam, 404 Connecting crossbeam, 405 First connecting column, 406 Connecting column lifting cylinder, 407 Second connecting column, 408 Top beam, 409 Rear compensating track, 410 Top beam lifting cylinder, 411 Telescopic column, 412 Track assembly, 413 Basic frame base. Detailed Implementation

[0041] like Figures 1-10 As shown, this utility model proposes a suspended rail reciprocating advanced support device, including a front basic frame 1, a hoisting trolley 2, an advanced support bracket, a rear basic frame 4, and a suspended rail. The advanced support bracket is composed of multiple intermediate frames 3 arranged with a spacing of 1 to 2 meters, and is located between the front basic frame 1 and the rear basic frame 4. The suspended rail is a single track with segmented telescopic connection, and is set horizontally between the front basic frame 1 and the rear basic frame 4. The hoisting trolley 2 is installed on the suspended rail and is used for reciprocating transport of the intermediate frames 3. The front compensation track 102 on the front basic frame 1 is connected to the hoisting trolley track 301 on the foremost intermediate frame 3, and the rear compensation track 409 on the rear basic frame 4 is connected to the hoisting trolley track 301 on the last intermediate frame 3.

[0042] Figure 1In the diagram, each intermediate frame 3 is given two states: one is working state A, where the top beams (side top beams 303 and intermediate top beams 305) extend upwards for jacking support; the other is movable state B, where the top beams (side top beams 303 and intermediate top beams 305) retract downwards in preparation for reciprocating transport via the hoisting trolley 2.

[0043] In working state A, the hoisting trolley tracks 301 on the adjacent intermediate frames 3 are connected one by one to form a suspension rail, which allows the hoisting trolley 2 to move back and forth on the suspension rail;

[0044] In the movable state B, after the coal mining machine has finished cutting the coal wall from the tail, the scraper conveyor moves forward, and the front basic frame 1 lowers its top-connecting part. The crawler assembly on it drives the front basic frame 1 to a suitable position. The front compensation track 102 is retracted via the front track telescopic mechanism 101 on the front basic frame 1, leaving sufficient space for the intermediate frame 3 to be moved forward. The rear intermediate frame 3 is transported to the front using the hoisting trolley 2. The connecting pin of the hoisting trolley track 301 of the rear intermediate frame 3 is removed, and the intermediate frame 3 is lowered to the appropriate height connected to the hoisting trolley 2. The rear compensation track 409 of the rear basic frame 4 extends and connects to the corresponding hoisting trolley track 301. The hoisting trolley 2 moves above the intermediate frame 3 and connects to the intermediate frame 3 via the hanger 207. The base 306 of the intermediate frame 3 retracts horizontally, and the intermediate frame retracts laterally. The side top beam 303 of 3 is then fully retracted, and the base 306 is completely retracted. The rotary reducer 208 of the hoisting trolley 2 is started to hoist the intermediate frame 3 to the most suitable position at the front. At the same time, the rear basic frame 4 lowers the top part, and the track assembly 412 on it drives the rear basic frame 4 to move forward to the suitable position. The rear basic frame 4 raises the top part, and the rear track telescopic mechanism 401 on it pushes the rear compensation track 409 to extend and connect with the hoisting trolley track 301 on the corresponding intermediate frame 3. The hoisting trolley 2 transports the last intermediate frame 3 to a suitable position between the front basic frame 1 and the intermediate frame 3. The side top beam 303 of the intermediate frame 3 is then horizontally unfolded, and the base 306 of the intermediate frame 3 is lowered to the ground. The hoisting frame 207 of the hoisting trolley 2 is disconnected from the intermediate frame 3 connected to it. The hoisting trolley 2 moves to the middle position of the suspension rail, and the top part of the intermediate frame 3 is raised. The two ends of the hoisting trolley track 301 on the intermediate frame 3 are respectively connected to the corresponding front compensation track 102 and the hoisting trolley track 301, and the next working state A is entered.

[0045] like Figures 4-7 As shown, the hoisting trolley 2 mainly includes a first pin 201, a brake arm 202, a second pin 203, a frame 204, a first drive unit 205, a third pin 206, a lifting frame 207, a rotary reducer 208, a motor 209, a second drive unit 210, a brake wheel 211, a brake pin 212, a brake shaft 213, and a spring 214. The specific structure is as follows:

[0046] The first drive unit 205 and the second drive unit 210 are symmetrically installed on the frame 204. The first drive unit 205 and the second drive unit 210 are set on both sides of the hoisting trolley track 301 by rollers. The output shaft of the motor 209 is connected to the input shaft of the rotary reducer 208 through a coupling. After passing through the rotary reducer 208, the power is transmitted to the first drive unit 205 and the second drive unit 210 by the output shaft of the rotary reducer 208. Brake arms 202 are symmetrically arranged on both sides of the frame 204. Each brake arm 202 is equipped with a first pin 201, a second pin 203, and a third pin 206 from top to bottom. The brake arm 202 swings around the second pin 203 located in the middle. The first pin 201 located at the top is hinged to one end of the brake shaft 213. The other end of the brake shaft 213 is equipped with a brake wheel 211 through a brake pin 212. The brake wheel 211 corresponds to the side of the hoisting trolley track 301. The third pins 206 of the two brake arms 202 are connected by a spring 214. A hanger 207 is installed at the bottom of the frame 204, and the hoisting trolley 2 is connected to the intermediate frame 3 through the hanger 207.

[0047] like Figures 8-10 As shown, the rear basic frame 4 mainly includes a rear track telescopic mechanism 401, a tail beam top-connecting cylinder 402, a top-connecting tail beam 403, a top-connecting crossbeam 404, a first top-connecting column 405, a top-connecting column lifting cylinder 406, a second top-connecting column 407, a top beam 408, a rear compensation track 409, a top beam lifting cylinder 410, a telescopic column 411, a track assembly 412, and a basic frame base 413. The specific structure is as follows:

[0048] Two basic frame bases 413 are symmetrically arranged, and each basic frame base 413 is mounted on the track assembly 412. Two parallel telescopic columns 411 are installed in the middle of each basic frame base 413. The upper end of the telescopic column 411 is connected to the top beam 408, and the lower end of the telescopic column 411 is in sliding fit with the middle of the basic frame base 413. A top beam lifting cylinder 410 is arranged vertically between the two telescopic columns 411. The lower end of the top beam lifting cylinder 410 is connected to the basic frame base 413, and the upper end of the top beam lifting cylinder 410 is connected to the top beam 408. Top columns (one set of first top columns 405 and one set of second top columns 407) are installed at the top four corners of the top of the top beam 408 through top column lifting cylinders 406. Top crossbeams 404 are respectively set on the top of the two first top columns 405 and the two second top columns 407. The rear track telescopic mechanism 401 is horizontally mounted on the top beam 408, and a rear compensating track 409 is installed at one end of the rear track telescopic mechanism 401. A top-connecting tail beam 403 is installed above one side of each base frame 413 via a tail beam top-connecting cylinder 402. The two top-connecting tail beams 403 correspond to each other. One end of the top-connecting tail beam 403 is hinged to the top beam 408, the lower end of the tail beam top-connecting cylinder 402 is connected to the base frame 413, and the upper end of the tail beam top-connecting cylinder 402 is hinged to the middle of the top-connecting tail beam 403.

[0049] In this utility model, the front basic frame 1 and the rear basic frame 4 have basically the same structure, the main difference being that the rear basic frame 4 has a top-mounted tail beam 403 and its corresponding installation structure.

[0050] like Figures 11-13 As shown, the intermediate frame 3 mainly includes a hoisting trolley track 301, a chain 302, a side top beam 303, a side top beam telescopic sleeve 304, an intermediate top beam 305, a base 306, a column jack 307, a side top beam telescopic cylinder 308, and a cylinder liner 309. The specific structure is as follows:

[0051] Two opposing bases 306 are each equipped with a column jack 307. A side top beam 303 is installed on the upper end of each column jack 307. Cylinder liners 309 are installed parallel to each other on one side of one side top beam 303, and the two cylinder liners 309 are slidably engaged with one side of the side top beam telescopic sleeve 304. Cylinder liners 309 are installed parallel to each other on one side of the other side top beam 303, and the two cylinder liners 309 are slidably engaged with the other side of the side top beam telescopic sleeve 304. An intermediate top beam 305 is installed in the middle of the side top beam telescopic sleeve 304. A side top beam telescopic cylinder 308 is set between each pair of parallel cylinder liners 309. The two ends of the side top beam telescopic cylinder 308 are connected to the corresponding side top beam 303 and intermediate top beam 305, respectively. A hoisting trolley track 301 is installed below the intermediate top beam 305 via a chain 302.

[0052] like Figures 1-13As shown, the working process of this utility model is divided into working state A and movable state B, which alternate in a cycle to achieve dynamic support for the roof of underground roadways in coal mines.

[0053] Working State A: At this time, the top beams (side top beams 303 and intermediate top beams 305) of multiple intermediate frames 3 extend upwards, making close contact with the roadway roof to provide roof support and stable support for the roadway. The hoisting trolley tracks 301 on adjacent intermediate frames 3 are connected one by one to form a complete suspension rail. The hoisting trolley 2 can move back and forth along this suspension rail between intermediate frames, flexibly adjusting the support position to provide continuous and stable support for the roof in different areas.

[0054] Movable State B: After the coal mining machine completes coal wall cutting from the tail and the scraper conveyor advances forward, the device enters this state. First, the front basic frame 1 lowers its roof-connecting section, using its track assembly to move itself to a suitable position. Then, the front compensation track 102 is retracted via the front track telescopic mechanism 101, thus creating sufficient space for the intermediate frame 3 to be moved forward. Subsequently, the hoisting trolley 2 begins operation, hoisting the intermediate frame 3 from its rearmost position to the front for installation. First, the connecting pin of the hoisting trolley track 301 of the rearmost intermediate frame 3 is removed, and the intermediate frame 3 is lowered to a suitable height for the hoisting trolley 2 to connect. At the same time, the rear compensation track 409 of the rear basic frame 4 extends and connects with the corresponding hoisting trolley track 301. The hoisting trolley 2 moves above the intermediate frame 3 and connects to it via the lifting frame 207. Then, it retracts the base 306 of the intermediate frame 3 horizontally and the side top beam 303 laterally. Finally, it fully retracts the base 306 and starts the rotary reducer 208 of the hoisting trolley 2 to hoist the intermediate frame 3 to the appropriate forward position. During this process, the rear base frame 4 moves synchronously, lowering its top-mounted section and advancing to the appropriate position via the track assembly 412. Then, it raises its top-mounted section and uses the rear track extension mechanism 401 to push the rear compensating track 409 out, connecting it to the corresponding hoisting trolley track 301 on the intermediate frame 3. After the hoisting trolley 2 transports the last intermediate frame 3 to a suitable position between the front basic frame 1 and the intermediate frame 3, it laterally unfolds the side top beam 303 of the intermediate frame 3, lowers the base 306 of the intermediate frame 3 to the ground, disconnects the connection between the hoisting trolley 2's hanger 207 and the intermediate frame 3, moves the hoisting trolley 2 to the middle position of the suspension rail, raises the top part of the intermediate frame 3, and connects the two ends of the hoisting trolley track 301 on the intermediate frame 3 with the corresponding front compensation track 102 and the hoisting trolley track 301 respectively. At this point, the device re-enters working state A and continues to support the top plate.

[0055] The implementation results show that the working process of this utility model is closely coordinated with the coal mining technology, with working state A and movable state B alternating cyclically. After the coal mining machine cuts the coal face and the scraper conveyor moves forward, the device can quickly enter movable state B. The front and rear basic frames move via the crawler assembly, and the hoisting trolley efficiently transports the intermediate frame, quickly completing the position adjustment of the support frame. Subsequently, it enters working state A to continue support. The entire process has a high degree of automation, seamlessly connects with coal mining operations, reduces waiting time between processes, ensures the continuity of coal mining operations, and improves the overall efficiency of coal mining.

Claims

1. A suspended rail reciprocating advanced support device, characterized in that, The device includes a front basic frame, a hoisting trolley, an advanced support frame, a rear basic frame, and a suspension rail. The advanced support frame is composed of intermediate frames arranged between the front and rear basic frames. The suspension rail is a segmented telescopic connection of individual rails, arranged horizontally between the front and rear basic frames. The hoisting trolley is mounted on the suspension rail and is an intermediate frame used for reciprocating transport. The front compensation rail on the front basic frame connects to the hoisting trolley rail on the foremost intermediate frame, and the rear compensation rail on the rear basic frame connects to the hoisting trolley rail on the rearmost intermediate frame.

2. The suspended rail reciprocating advance support device according to claim 1, characterized in that, Each intermediate frame has two states: one is working state A, where the top beam extends upwards for top support, and the other is movable state B, where the top beam retracts downwards in preparation for reciprocating transportation by a hoisting trolley.

3. The suspended rail reciprocating advance support device according to claim 1, characterized in that, The hoisting trolley includes a first pivot, brake arm, second pivot, frame, first drive unit, third pivot, rotary reducer, motor, second drive unit, brake wheel, brake pin, brake shaft, and spring. Its specific structure is as follows: The first drive unit and the second drive unit are symmetrically installed on the frame. The first drive unit and the second drive unit are set on both sides of the hoisting trolley track by rollers. The motor output shaft is connected to the input shaft of the rotary reducer through a coupling. The power is transmitted to the first drive unit and the second drive unit by the output shaft of the rotary reducer after passing through the rotary reducer. Brake arms are symmetrically arranged on both sides of the frame. Each brake arm is equipped with a first pin, a second pin, and a third pin from top to bottom. The brake arm swings around the second pin located in the middle. The first pin located at the top is hinged to one end of the brake shaft. The other end of the brake shaft is equipped with a brake wheel through a brake pin. The brake wheel corresponds to the side of the hoisting trolley track. The third pins of the two brake arms are connected by a spring.

4. The suspended rail reciprocating advance support device according to claim 3, characterized in that, A hanger is installed at the bottom of the frame, and the hoisting trolley is connected to the intermediate frame through the hanger.

5. The suspended rail reciprocating advance support device according to claim 1, characterized in that, The rear basic frame includes a rear track telescopic mechanism, a top-mounted crossbeam, a first top-mounted column, a top-mounted column lifting cylinder, a second top-mounted column, a top beam, a rear compensating track, a top beam lifting cylinder, telescopic columns, a track assembly, and a basic frame base. The specific structure is as follows: Two basic frame bases are symmetrically arranged, and each basic frame base is mounted on the track assembly. Two parallel telescopic columns are installed in the middle of each basic frame base. The upper end of the telescopic column is connected to the top beam, and the lower end of the telescopic column is in sliding fit with the middle of the basic frame base. A top beam lifting cylinder is installed vertically between the two telescopic columns. The lower end of the top beam lifting cylinder is connected to the basic frame base, and the upper end of the top beam lifting cylinder is connected to the top beam. Top-connecting columns are installed at the four corners of the top of the top beam through top-connecting column lifting cylinders. Top-connecting crossbeams are installed at the top of the two first top-connecting columns and the two second top-connecting columns. The rear track telescopic mechanism passes through the top beam in the horizontal direction, and a rear compensation track is installed at one end of the rear track telescopic mechanism.

6. The suspended rail reciprocating advance support device according to claim 5, characterized in that, A top-connecting tail beam is installed above one side of each basic frame base via a tail beam top-connecting cylinder. The two top-connecting tail beams correspond to each other. One end of the top-connecting tail beam is hinged to the top beam. The lower end of the tail beam top-connecting cylinder is connected to the basic frame base, and the upper end of the tail beam top-connecting cylinder is hinged to the middle of the top-connecting tail beam.

7. The suspended rail reciprocating advance support device according to claim 1, characterized in that, The intermediate frame includes a hoisting trolley track, chain, side top beam, side top beam telescopic sleeve, intermediate top beam, base, column jack, side top beam telescopic cylinder, and cylinder liner. The specific structure is as follows: Two opposing bases are each equipped with a column jack. A side top beam is installed on the upper end of each column jack. One side top beam has cylinder liners installed parallel to each other on one side, and the two cylinder liners slide in fit with one side of the side top beam telescopic sleeve. The other side top beam has cylinder liners installed parallel to each other on one side, and the two cylinder liners slide in fit with the other side of the side top beam telescopic sleeve. A middle top beam is installed in the middle of the side top beam telescopic sleeve. A side top beam telescopic cylinder is installed between each pair of parallel cylinder liners. The two ends of the side top beam telescopic cylinder are connected to the corresponding side top beam and the middle top beam, respectively. A hoisting trolley track is installed below the middle top beam via a chain.

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