Suspension rail reciprocating type forepoling device and using method thereof

Abstract

The invention relates to the technical field of coal mine underground supporting equipment, in particular to a suspension rail reciprocating type advance supporting device and a using method thereof. 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. By adopting the suspension rail reciprocating type design and cooperating with the lifting trolley, the problems that in the prior art, the driving efficiency is low, the supporting adaptability is poor, and the collaborative operation capacity is weak are effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of underground support equipment in coal mines, and specifically to a suspended rail reciprocating advanced support device and its use method, which are mainly applicable to the roadway driving and coal mining operations in underground coal mines in the coal industry, especially the advanced support in fully mechanized coal mining faces. Background Technique

[0002] The advanced support device is mainly used for the roof support of the transportation roadway and the return air crossheading in the fully mechanized coal mining face of underground coal mines, and is an important equipment to prevent roof caving. At present, the advanced support technologies at home and abroad are mainly divided into the following categories:

[0003] (1) Single hydraulic prop support

[0004] Single hydraulic props are used in combination with articulated roof beams or I-beams for support. Its structure is simple, the cost is low, and the adaptability is strong. However, it requires manual handling, setting up and recovering the props, resulting in a large labor intensity. As the working face advances, the props need to be repeatedly moved, which affects the coal mining efficiency and the support efficiency is low. Workers need to operate in the non-supported area, which is prone to roof fall accidents and the safety is poor.

[0005] (2) Stepping advanced support hydraulic support

[0006] The hydraulic support structure is adopted and it moves forward by an alternating stepping method. The degree of mechanization is high, reducing manual intervention, with a large support strength, and is suitable for high-stress roadways. However, it is necessary to repeatedly support the roof, and the process of lowering the support - moving the support - raising the support is likely to cause roof fragmentation. Some supports cannot be lowered into the well as a whole and need to be assembled underground. For example:

[0007] The patent with the publication number CN111852531A proposes a roadway advanced support hydraulic support, which adopts double support moving jacks, a pushing support, a fixed roof beam, a protective wall panel and rigid connections between the supports, etc. This hydraulic support is mainly applicable to the fully mechanized mining face with mesh paving, and there are certain limitations in meeting the diverse needs of the advanced support in the fully mechanized coal mining face, and its adaptability to different geological conditions and mining processes is not strong enough. Its forward movement adopts double support moving jacks. Although the movement of the support can be realized, it may cause a certain disturbance to the roof during the movement process, affecting the stability of the roof.

[0008] The patent with the publication number CN111255496A proposes a coal pillar-assisted mine-used advanced temporary support device and its use method, which adopts coal pillar support, cutting drum, stepping pushing mechanism and step-by-step forward movement of the support mechanism, etc. The support for the roof depends on the existence of the coal pillar. When the coal pillar conditions are not good, the support stability will be greatly affected, and there are certain safety hazards. The movement and adjustment of the support device need to cooperate with the operation of the roadheader. For a separate advanced support operation, the flexibility is insufficient and it is difficult to quickly adapt to the changes of the working face.

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

[0010] It adopts a single rail hoist or cantilever beam structure, and the support moves along the track, reducing the repeated support of the roof. The overall movement of the support reduces roof damage and avoids repeated support. Only the lifting of the support frame is realized, and the problem of overall movement is not solved. For example:

[0011] The patent with publication number CN102383815A proposes a suspended roadway tunneling temporary support device and its usage method, which adopts an I-beam suspension beam, a push hydraulic cylinder drive, a fixed lifting platform support, etc. The stability and reliability of this temporary support device in steeply inclined roadways or complex geological conditions need to be improved. It is suspended on the roadway roof through an I-beam suspension beam. For roadways with poor roof conditions or undulating changes, it may not be able to maintain stable support. It is mainly concentrated near the tunneling face of the roadway, and it is difficult to effectively cover the large-scale roof support required for advanced support.

[0012] The patent with publication number CN110578543A proposes a suspended rail wing type support platform, which uses a luffing hydraulic cylinder to drive the wing type support frame to lift, relies on the passive movement of the suspended rail platform, and the side wing support frame is folded by a support hydraulic cylinder, etc. It has poor adaptability to the advanced support of roadways. It is mainly used for operations such as wire mesh support, hoisting, and transportation during roadway tunneling, and it lacks consideration for specific requirements of advanced support in fully mechanized mining faces, such as long-term stable support for the roof and adaptation to mining-induced influence. There are deficiencies in support strength and stability. This support platform mainly relies on the contact between the wing type support frame and the top of the roadway for support. For the situation of broken roof or large pressure, the support effect may not be ideal.

[0013] The patent with publication number CN216198209U proposes a coal mine roadway advanced support device based on a single rail hoist, including a single rail hoist with tracks on both outer walls and two suspension bolts respectively fixedly connected to the outer wall of the top of the single rail hoist. Connecting plates are welded on the outer walls at both ends of the top of the single rail hoist. There are two moving mechanisms at one end of the single rail hoist, and each moving mechanism includes two walking wheels respectively rolling and installed in the tracks on both sides of the single rail hoist. This device mainly conducts support through the single rail hoist and hydraulic cylinders. For roadways with large roof pressure, the support strength may be insufficient. Summary of the Invention

[0014] In order to solve the technical problems existing in the prior art, the purpose of the present invention is to provide a suspended rail reciprocating type 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 cooperative operation ability in the prior art. It can flexibly adjust the support position according to roadway conditions and roof conditions, realize stable support for the roof, and is applicable to various complex geological conditions.

[0015] The technical solution of the present invention is as follows:

[0016] A suspended rail reciprocating advanced support device, which includes a front basic frame, a hoisting trolley, an advanced support bracket, a rear basic frame and a suspended rail. The advanced support bracket is formed by arranging intermediate frames and is located between the front basic frame and the rear basic frame. The suspended rail is a single track connected in a segmented telescopic manner and is arranged horizontally between the front basic frame and the rear basic frame. The hoisting trolley is installed on the suspended rail and is used for reciprocating transportation of the intermediate frames. The front compensation track on the front basic frame is docked with the hoisting trolley track on the frontmost intermediate frame, and the rear compensation track on the rear basic frame is docked with the hoisting trolley track on the rearmost intermediate frame.

[0017] For the above-mentioned suspended rail reciprocating advanced support device, each intermediate frame has two states: one is the working state A in which the roof beam extends upward for roof support, and the other is the movable state B in which the roof beam contracts downward to prepare for reciprocating transportation through the hoisting trolley.

[0018] For the above-mentioned suspended rail reciprocating advanced support device, the hoisting trolley includes a first pin shaft, a brake arm, a second pin shaft, a frame body, a first driving unit, a third pin shaft, a rotary reducer, a motor, a second driving unit, a brake wheel, a brake pin, a brake shaft, and a spring. The specific structure is as follows:

[0019] The first driving unit and the second driving unit are symmetrically installed on the frame body. The first driving unit and the second driving unit are arranged on both sides of the hoisting trolley track through rollers. The output shaft of the motor is connected to the input shaft of the rotary reducer through a coupling. After the power passes through the rotary reducer, it is transmitted from the output shaft of the rotary reducer to the first driving unit and the second driving unit. Brake arms are symmetrically arranged on both sides of the frame body. Each brake arm is provided with a first pin shaft, a second pin shaft, and a third pin shaft from top to bottom. The brake arm swings around the second pin shaft located in the middle. The first pin shaft located in the upper part is hinged to one end of the brake shaft. The other end of the brake shaft is installed with a brake wheel through a brake pin. The brake wheel corresponds to the side surface of the hoisting trolley track. The third pin shafts of the two brake arms are connected by a spring.

[0020] For the above-mentioned suspended rail reciprocating advanced support device, a hanging bracket is installed at the bottom of the frame body, and the hoisting trolley is connected to the intermediate frame through the hanging bracket.

[0021] For the above-mentioned suspended rail reciprocating advanced support device, the rear basic frame includes a rear track telescoping mechanism, a roof connecting cross beam, a first roof connecting column, a roof connecting column lifting cylinder, a second roof connecting column, a roof beam, a rear compensation track, a roof beam lifting cylinder, a telescopic column, a crawler assembly, and a basic frame base. The specific structure is as follows:

[0022] The two basic frame bases are symmetrically arranged, and each basic frame base is installed on the crawler assembly. Two parallel telescopic columns are installed in the middle of each basic frame base. The upper ends of the telescopic columns are connected to the top beam, and the lower ends of the telescopic columns are in sliding fit with the middle of the basic frame base. A top beam lifting cylinder is arranged 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. The four corners of the top of the top beam are respectively installed with roof contact columns through roof contact column lifting cylinders. The tops of the two first roof contact columns and the two second roof contact columns are respectively provided with roof contact cross beams; the rear track telescopic mechanism is horizontally arranged through the top beam, and one end of the rear track telescopic mechanism is installed with a rear compensation track.

[0023] In the described suspended rail reciprocating advanced support device, on one side above each basic frame base, a roof contact tail beam is installed through a tail beam roof contact cylinder. The two roof contact tail beams correspond to each other. One end of the roof contact tail beam is hinged to the top beam. The lower end of the tail beam roof contact cylinder is connected to the basic frame base, and the upper end of the tail beam roof contact cylinder is hinged to the middle of the roof contact tail beam.

[0024] In the described suspended rail reciprocating advanced support device, the intermediate frame includes a hoisting trolley track, a chain, a side top beam, a side top beam telescopic sleeve, an intermediate top beam, a base, a column jack, a side top beam telescopic cylinder, and a cylinder sleeve. The specific structure is as follows:

[0025] Column jacks are respectively installed on two relatively arranged bases. The upper end of each column jack is installed with a side top beam. Among them: on one side of one side top beam, two cylinder sleeves are installed in parallel. The two cylinder sleeves are in sliding fit with one side of the side top beam telescopic sleeve; on one side of the other side top beam, two cylinder sleeves are installed in parallel. The two cylinder sleeves are in sliding fit with the other side of the side top beam telescopic sleeve; the intermediate top beam is installed in the middle of the side top beam telescopic sleeve. A side top beam telescopic cylinder is arranged between each group of two parallel cylinder sleeves. The two ends of the side top beam telescopic cylinder are respectively connected to the corresponding side top beam and the intermediate top beam. The hoisting trolley track is installed below the intermediate top beam through a chain.

[0026] A usage method of a suspended rail reciprocating advanced support device, in which the working state A and the movable state B alternate in a cycle to realize the dynamic support of the roof of the coal mine roadway.

[0027] In the usage method of the described suspended rail reciprocating advanced support device, working state A: the top beam of the intermediate frame extends upward and is in close contact with the roof of the roadway to carry out roof contact support, providing a stable supporting force for the roadway; the hoisting trolley tracks on adjacent intermediate frames are docked one by one to form a complete suspended rail, and the hoisting trolley can reciprocate between each intermediate frame along this suspended rail to continuously and stably support the roof in different areas.

[0028] The method for using the suspended rail reciprocating advance support device is as follows: movable state B: when the coal mining machine completes coal wall cutting from the tail of the machine and the scraper conveyor moves forward, the device enters this state; first, the front basic frame lowers the top connection part and uses the crawler assembly thereon to drive itself forward, and then retracts the front compensation rail through the front rail telescopic mechanism, thereby freeing up enough space for the intermediate frame to be moved forward; then, the lifting trolley starts working and lifts the intermediate frame in the rear position to the front for installation; first remove the lifting trolley track connecting pin of the rearmost intermediate frame, and lower the intermediate frame to a height at which the lifting trolley can be connected; at the same time, the rear compensation rail of the rear basic frame extends out and is connected to the corresponding lifting trolley track; the lifting trolley moves to the top of the intermediate frame, connects to the intermediate frame through the hanger, and then shrinks the base of the intermediate frame in the horizontal direction and retracts it laterally. Retract the side top beams, then completely retract the base, start the rotary reducer of the lifting trolley, and lift the intermediate frame to the front; in this process, the rear basic frame moves synchronously, lowers the top connection part, drives itself forward through the crawler assembly, and then lifts the top connection part, uses the rear track telescopic mechanism to push the rear compensation track out, and connects with the lifting trolley track on the corresponding intermediate frame; the lifting trolley transports the rearmost intermediate frame to the front between the front basic frame and the intermediate frame, horizontally unfolds the side top beams of the intermediate frame, drops the base of the intermediate frame to the ground, disconnects the connection between the lifting trolley's hanger and the intermediate frame, moves the lifting trolley to the middle position of the suspension rail, lifts the top connection part of the intermediate frame, and the two ends of the lifting trolley track on the intermediate frame are respectively docked with the corresponding front compensation track and the lifting trolley track. At this point, the device re-enters working state A and continues to support the top plate.

[0029] The design concept of the present invention is mainly reflected in the following aspects:

[0030] The traditional underground support device in coal mines has problems of low efficiency and inflexible adjustment during movement, especially in the advanced support of the fully mechanized mining face, where frequent movement and adjustment put forward higher requirements on support efficiency and safety. The present invention adopts a reciprocating design of the suspended rail, and realizes efficient reciprocating movement of the support device through the cooperation of the segmented telescopic suspended rail and the lifting trolley. This design not only improves the moving speed of the support device, but also realizes the flexible adjustment of the support device between different positions through the precise control of the lifting trolley. The suspended rail adopts a segmented telescopic structure, and the track length can be flexibly adjusted according to the length of the tunnel and the support requirements, ensuring that the lifting trolley can move smoothly on the track. The lifting trolley is driven by a hydraulic motor and a rotary reducer, which can efficiently transport the intermediate frame from the rear basic frame to the front basic frame, and is equipped with a braking device to ensure the safety of the moving process.

[0031] The geological conditions of the roadway in the coal mine are complex and changeable. The height, width, and inclination angle of the roadway may change at any time, which poses challenges to the adaptability of the support device. Through the flexible adjustment of the intermediate frame and the multi-functional design of the basic frame, the present invention ensures that the support device can meet the support requirements under different roadway conditions. The intermediate frame has two states: working state A (support state) and movable state B (transport state). In working state A, the top beam of the intermediate frame extends upward and closely contacts the roadway roof to provide stable support. In movable state B, the top beam of the intermediate frame contracts downward, and the base and side top beams contract laterally to facilitate the transportation of the hoisting trolley. Both the front basic frame and the rear basic frame are equipped with telescopic columns, top beam lifting cylinders, and roof contact column lifting cylinders, which can adjust the support height according to the roadway height and achieve overall movement through the crawler assembly to adapt to the change of the inclination angle of the roadway.

[0032] Traditional support devices may cause disturbances to the roadway roof during movement, affecting the stability of the roof and increasing the risk of roof fall accidents. Through the support and guiding functions of the special monorail crane track, the present invention reduces the direct contact and disturbance of the support device to the roof during movement. At the same time, the structural design of the support device is optimized to improve the support strength and stability. The hoisting trolley moves along the special monorail crane track, and the support and guiding functions of the track ensure that the influence of the support device on the roof during movement is minimized, protecting the integrity of the roof. The intermediate frame adopts a double telescopic column and side top beam telescopic cylinder design, which can adjust the support force according to the pressure and shape of the roadway roof to ensure that the roof is effectively supported and reduce roof subsidence and deformation.

[0033] The advantages and beneficial effects of the present invention are as follows:

[0034] 1. Efficient movement: The support device of the present invention can quickly move from one position to another, greatly improving the support efficiency, reducing the time occupied by the movement of the support device, and thus improving the working efficiency of roadway driving or coal mining.

[0035] 2. Strong adaptability: The suspended rail reciprocating design of the present invention can adapt to different roadway conditions, including changes in the width and height of the roadway and the inclination angle of the roadway. By adjusting the suspension position and angle of the track, the support device can better adapt to the complex roadway environment and ensure stable operation under various geological conditions.

[0036] 3. During underground coal mine operations, the support device needs to cooperate with equipment such as shearer and scraper conveyor. However, the movement and adjustment of traditional support devices often affect the overall operation efficiency. The present invention realizes the rapid movement and flexible adjustment of the support device through the reciprocating design of the suspension track and the efficient transportation of the hoisting trolley, ensuring that the support device can cooperate with the coal mining equipment and improving the overall operation efficiency of the fully mechanized coal mining face. The hoisting trolley can quickly transport the intermediate frame from the rear basic frame to the front basic frame, reducing the time occupied by the movement of the support device and improving the working efficiency of roadway driving or coal mining. The movement and adjustment of the front basic frame and the rear basic frame match the operation rhythm of the shearer and the scraper conveyor, ensuring the smooth and efficient operation process of the entire fully mechanized coal mining face.

[0037] 4. The hoisting trolley of the present invention is equipped with braking devices such as a braking arm, a braking wheel, and a spring, which can quickly brake in case of emergency to ensure the safety of the moving process.

[0038] 5. The present invention realizes the efficient movement and flexible adjustment of the support device through the reciprocating design of the suspension track and the efficient transportation of the hoisting trolley; adapts to complex geological conditions through the multi-state design of the intermediate frame and the multi-functional design of the basic frame; reduces roof disturbance and improves support stability through the support and guiding functions of the special monorail crane track. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figures 1 - 3 It is a schematic structural diagram of the reciprocating advanced support device with a suspension track of the present invention. Among them, Figure 1 is the front view, Figure 2 is the top view, Figure 3 is the side view.

[0040] Figures 4 - 7 It is a schematic structural diagram of the hoisting trolley of the present invention. Among them, Figure 4 is the front view, Figure 5 is the top view, Figure 6 is the side view, Figure 7 is Figure 4 the A-A sectional view in

[0041] Figures 8 - 10 It is a schematic structural diagram of the rear basic frame of the present invention. Among them, Figure 8 is the front view, Figure 9 is the top view, Figure 10 is Figure 8 the B-B view in

[0042] Figures 11 - 13 It is a schematic structural diagram of the intermediate frame of the present invention. Among them, Figure 11 is the front view, Figure 12 is the top view, Figure 13 is the side view.

[0043] In the figure, 1 is the front basic frame, 101 is the front track telescopic mechanism, 102 is the front compensation track; 2 is the hoisting trolley, 201 is the first pin shaft, 202 is the brake arm, 203 is the second pin shaft, 204 is the frame body, 205 is the first driving unit, 206 is the third pin shaft, 207 is the hanging bracket, 208 is the rotary speed reducer, 209 is the motor, 210 is the second driving unit, 211 is the brake wheel, 212 is the brake pin, 213 is the brake shaft, 214 is the spring; 3 is the middle frame, 301 is the hoisting trolley track, 302 is the chain, 303 is the side top beam, 304 is the side top beam telescopic sleeve, 305 is the middle top beam, 306 is the base, 307 is the column jack, 308 is the side top beam telescopic cylinder, 309 is the cylinder sleeve; 4 is the rear basic frame, 401 is the rear track telescopic mechanism, 402 is the tail beam roof contacting cylinder, 403 is the roof contacting tail beam, 404 is the roof contacting cross beam, 405 is the first roof contacting column, 406 is the roof contacting column lifting cylinder, 407 is the second roof contacting column, 408 is the top beam, 409 is the rear compensation track, 410 is the top beam lifting cylinder, 411 is the telescopic column, 412 is the crawler assembly, 413 is the basic frame base. Detailed implementation mode

[0044] As Figures 1 - 10 shown, the present invention provides a suspended track 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 track. The advanced support bracket is composed of a plurality of middle frames 3 arranged at intervals of 1 to 2 meters and is located between the front basic frame 1 and the rear basic frame 4. The suspended track is a single track connected in a segmented telescopic manner and is arranged horizontally between the front basic frame 1 and the rear basic frame 4. The hoisting trolley 2 is installed on the suspended track and is used for the middle frame 3 for reciprocating transportation. The front compensation track 102 on the front basic frame 1 is docked with the hoisting trolley track 301 on the frontmost middle frame 3, and the rear compensation track 409 on the rear basic frame 4 is docked with the hoisting trolley track 301 on the rearmost middle frame 3.

[0045] Figure 1 Among them, each middle frame 3 has two states. One is the working state A in which the top beam (side top beam 303, middle top beam 305) extends upward for roof contacting support, and the other is the movable state B in which the top beam (side top beam 303, middle top beam 305) contracts downward to prepare for reciprocating transportation through the hoisting trolley 2. Among them:

[0046] In the working state A, the hoisting trolley tracks 301 on adjacent middle frames 3 are docked one by one to form a suspended track, which can be used for the hoisting trolley 2 to reciprocate on the suspended track;

[0047] In the movable state B, when the shearer finishes cutting the coal wall from the tail end of the face, the scraper conveyor moves forward. The front main support 1 lowers its roof-contacting part, and drives the front main support 1 forward to a proper position through the crawler assembly thereon. The front track telescoping mechanism 101 on the front main support 1 retracts the front compensation track 102 to leave enough space for the intermediate support 3 to be moved forward. The hoisting trolley 2 is used to transport the last intermediate support 3 to the front for installation. The connecting pin shaft of the hoisting trolley track 301 of the last intermediate support 3 is removed, and the intermediate support 3 is lowered to a proper height connected to the hoisting trolley 2. The rear compensation track 409 of the rear main support 4 extends and is connected to the corresponding hoisting trolley track 301. The hoisting trolley 2 moves above the intermediate support 3 and is connected to the intermediate support 3 through the hanger 207. The base 306 of the intermediate support 3 is contracted horizontally, the side roof beam 303 of the intermediate support 3 is contracted transversely, and then the base 306 is completely retracted. The rotary reducer 208 of the hoisting trolley 2 is started to hoist the intermediate support 3 to a proper position at the front. At the same time, the rear main support 4 lowers its roof-contacting part, and drives the rear main support 4 forward to a proper position through the crawler assembly 412 thereon. The rear main support 4 raises its roof-contacting part, and the rear track telescoping mechanism 401 thereon pushes the rear compensation track 409 to extend and is connected to the hoisting trolley track 301 on the corresponding intermediate support 3. The hoisting trolley 2 drives the last intermediate support 3 to be transported to a proper position between the front main support 1 and the intermediate support 3 at the front. The side roof beam 303 of the intermediate support 3 is expanded transversely, and then the base 306 of the intermediate support 3 is lowered to the ground. The hanger 207 of the hoisting trolley 2 is disconnected from the intermediate support 3 connected thereto. The hoisting trolley 2 moves to the middle position of the suspended track, and the roof-contacting part of the intermediate support 3 is raised. The two ends of the hoisting trolley track 301 on the intermediate support 3 are respectively butted with the corresponding front compensation track 102 and hoisting trolley track 301, and enters the next working state A.

[0048] As Figures 4 - 7 shown, the hoisting trolley 2 mainly includes a first pin shaft 201, a brake arm 202, a second pin shaft 203, a frame body 204, a first drive unit 205, a third pin shaft 206, a hanger 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:

[0049] The first driving unit 205 and the second driving unit 210 are symmetrically installed on the frame body 204. The first driving unit 205 and the second driving unit 210 are arranged on both sides of the hoisting trolley track 301 through rollers. The output shaft of the motor 209 is connected to the input shaft of the rotary speed reducer 208 through a coupling. After the power passes through the rotary speed reducer 208, it is transmitted from the output shaft of the rotary speed reducer 208 to the first driving unit 205 and the second driving unit 210. Brake arms 202 are symmetrically arranged on both sides of the frame body 204. A first pin shaft 201, a second pin shaft 203, and a third pin shaft 206 are installed on each brake arm 202 from top to bottom. The brake arm 202 swings around the second pin shaft 203 located in the middle. The first pin shaft 201 located in the upper part is hinged to one end of the brake shaft 213. The other end of the brake shaft 213 is installed with a brake wheel 211 through a brake pin 212. The brake wheel 211 corresponds to the side surface of the hoisting trolley track 301. The third pin shafts 206 of the two brake arms 202 are connected by a spring 214. A hanger 207 is installed at the bottom of the frame body 204. The hoisting trolley 2 is connected to the intermediate frame 3 through the hanger 207.

[0050] As Figures 8 - 10 shown, the rear basic frame 4 mainly includes a rear track telescopic mechanism 401, a tail beam roof contact cylinder 402, a roof contact tail beam 403, a roof contact cross beam 404, a first roof contact column 405, a roof contact column lifting cylinder 406, a second roof contact column 407, a roof beam 408, a rear compensation track 409, a roof beam lifting cylinder 410, a telescopic column 411, a crawler assembly 412, and a basic frame base 413. The specific structure is as follows:

[0051] The two basic frame bases 413 are symmetrically arranged, and each basic frame base 413 is installed on the crawler 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. Four corners of the top of the top beam 408 are respectively installed with roof contacting columns (one set of the first roof contacting column 405 and the second roof contacting column 407 each) through the roof contacting column lifting cylinders 406. The tops of the two first roof contacting columns 405 and the two second roof contacting columns 407 are respectively provided with roof contacting cross beams 404. The rear track telescopic mechanism 401 is arranged horizontally through the top beam 408, and a rear compensation track 409 is installed at one end of the rear track telescopic mechanism 401. Above one side of each basic frame base 413, a roof contacting tail beam 403 is installed through a tail beam roof contacting cylinder 402. The two roof contacting tail beams 403 correspond to each other. One end of the roof contacting tail beam 403 is hinged to the top beam 408. The lower end of the tail beam roof contacting cylinder 402 is connected to the basic frame base 413, and the upper end of the tail beam roof contacting cylinder 402 is hinged to the middle of the roof contacting tail beam 403.

[0052] In the present invention, the structures of the front basic frame 1 and the rear basic frame 4 are basically the same, and the main difference is that the rear basic frame 4 is provided with a roof contacting tail beam 403 and its corresponding installation structure.

[0053] As Figures 11 - 13 shown, the middle frame 3 mainly includes a hoisting trolley track 301, a chain 302, a side top beam 303, a side top beam telescopic sleeve 304, a middle top beam 305, a base 306, a column jack 307, a side top beam telescopic cylinder 308, and a cylinder sleeve 309. The specific structure is as follows:

[0054] Column jacks 307 are respectively installed on two relatively arranged bases 306. The upper end of each column jack 307 is installed with a side top beam 303. Among them: on one side of one side top beam 303, cylinder sleeves 309 are relatively and parallelly installed, and the two cylinder sleeves 309 are in sliding fit with one side of the side top beam telescopic sleeve 304; on one side of the other side top beam 303, cylinder sleeves 309 are relatively and parallelly installed, and the two cylinder sleeves 309 are in sliding fit with the other side of the side top beam telescopic sleeve 304; the middle of the side top beam telescopic sleeve 304 is installed with a middle top beam 305. A side top beam telescopic cylinder 308 is arranged between each group of two parallel cylinder sleeves 309. The two ends of the side top beam telescopic cylinder 308 are respectively connected to the corresponding side top beam 303 and the middle top beam 305. The hoisting trolley track 301 is installed below the middle top beam 305 through the chain 302.

[0055] As Figures 1 - 13As shown, the working process of the present invention is divided into a working state A and a movable state B, which are cyclically alternating to achieve dynamic support of the roof of the underground coal mine tunnel.

[0056] Working state A: At this time, the top beams (side top beams 303, middle top beams 305) of multiple intermediate frames 3 extend upward and are in close contact with the tunnel roof to provide top support and provide stable support for the tunnel. The hoisting trolley tracks 301 on adjacent intermediate frames 3 are connected one by one to form a complete suspension track. The hoisting trolley 2 can move back and forth between the intermediate frames along this suspension track, flexibly adjust the support position, and provide continuous and stable support for the roofs of different areas.

[0057] Movable state B: When the coal mining machine completes the coal wall cutting from the tail of the machine and the scraper conveyor moves forward, the device enters this state. First, the front basic frame 1 lowers the top connection part and uses the crawler assembly thereon to drive itself forward to the appropriate position. Then, the front compensation track 102 is retracted through the front track telescopic mechanism 101, thereby making enough space for the intermediate frame 3 to be moved forward. Subsequently, the lifting trolley 2 starts to work and lifts the intermediate frame 3 in the rear position to the front for installation. First, remove the connecting pin of the lifting trolley track 301 of the rearmost intermediate frame 3, and lower the intermediate frame 3 to a suitable height for the lifting trolley 2 to connect; at the same time, the rear compensation track 409 of the rear basic frame 4 extends out and connects to the corresponding lifting trolley track 301. The hoisting trolley 2 moves to the top of the intermediate frame 3, connects to the intermediate frame 3 through the hanger 207, then shrinks the base 306 of the intermediate frame 3 in the horizontal direction, shrinks the side top beam 303 laterally, and then completely retracts the base 306, starts the rotary reducer 208 of the hoisting trolley 2, and hoists the intermediate frame 3 to the most suitable position at the front. In this process, the rear basic frame 4 moves synchronously, lowers the top connection part, drives itself forward to the suitable position through the crawler assembly 412, and then lifts the top connection part, and uses the rear track telescopic mechanism 401 to push the rear compensation track 409 to extend and connect with the hoisting trolley track 301 on the corresponding intermediate frame 3. After the lifting trolley 2 transports the rearmost 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 horizontally unfolded, the base 306 of the intermediate frame 3 is dropped to the ground, the connection between the hanger 207 of the lifting trolley 2 and the intermediate frame 3 is disconnected, the lifting trolley 2 moves to the middle position of the suspension rail, and the top connecting part of the intermediate frame 3 is raised. The two ends of the lifting trolley track 301 on the intermediate frame 3 are respectively docked with the corresponding front compensation track 102 and the lifting trolley track 301. At this point, the device re-enters the working state A and continues to support the top plate.

[0058] The implementation results show that the working process of the present invention is closely coordinated with the coal mining process, and the working state A and the movable state B alternate cyclically. When the shearer finishes cutting the coal wall and the scraper conveyor moves forward, the device can quickly enter the movable state B. The front basic support and the rear basic support move through the crawler assembly, and the hoisting trolley efficiently transports the intermediate support, quickly completing the position adjustment of the support frame, and then entering the working state A to continue the support. The entire process has a high degree of automation, seamless connection with the coal mining operation, reduces the waiting time between each process, ensures the continuity of the coal mining operation, and improves the overall efficiency of coal mine exploitation.

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 bracket, a rear basic frame and a suspended rail. The advanced support brackets are arranged as intermediate frames and are located between the front basic frame and the rear basic frame. The suspended rail is a single track with segmented telescopic connections and is horizontally arranged between the front basic frame and the rear basic frame. The hoisting trolley is installed on the suspended rail and is used for reciprocating transportation of the intermediate frames. The front compensation track on the front basic frame is docked with the hoisting trolley track on the foremost intermediate frame, and the rear compensation track on the rear basic frame is docked with the hoisting trolley track on the rearmost intermediate frame.

2. The suspended rail reciprocating advanced support device according to claim 1, characterized in that, Each intermediate frame has two states: one is the working state A in which the roof beam extends upward for roof support, and the other is the movable state B in which the roof beam contracts downward to prepare for reciprocating transportation by the hoisting trolley.

3. The overhanging rail reciprocating advanced support device according to claim 1, characterized in that, The hoisting trolley includes a first pin shaft, a braking arm, a second pin shaft, a frame body, a first driving unit, a third pin shaft, a rotary reducer, a motor, a second driving unit, a braking wheel, a braking pin, a braking shaft and a spring. The specific structure is as follows: The first driving unit and the second driving unit are symmetrically installed on the frame body. The first driving unit and the second driving unit are arranged on both sides of the hoisting trolley track through rollers. The output shaft of the motor is connected to the input shaft of the rotary reducer through a coupling. After the power passes through the rotary reducer, it is transmitted from the output shaft of the rotary reducer to the first driving unit and the second driving unit. Braking arms are symmetrically arranged on both sides of the frame body. Each braking arm is equipped with a first pin shaft, a second pin shaft and a third pin shaft from top to bottom. The braking arm swings around the second pin shaft located in the middle. The first pin shaft located in the upper part is hinged to one end of the braking shaft. The other end of the braking shaft is installed with a braking wheel through a braking pin. The braking wheel corresponds to the side surface of the hoisting trolley track. The third pin shafts of the two braking arms are connected by a spring.

4. The suspended rail reciprocating advanced support device according to claim 3, wherein, A suspension bracket is installed at the bottom of the frame body, and the hoisting trolley is connected to the intermediate frame through the suspension bracket.

5. The overhanging rail reciprocating advanced support device according to claim 1, characterized in that, The rear basic frame includes a rear track telescopic mechanism, a roof connecting cross beam, a first roof connecting column, a roof connecting column lifting cylinder, a second roof connecting column, a roof beam, a rear compensation track, a roof beam lifting cylinder, a telescopic column, a crawler 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 installed on the crawler 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 roof beam, and the lower end of the telescopic column is in sliding fit with the middle of the basic frame base. A roof beam lifting cylinder is vertically arranged between the two telescopic columns. The lower end of the roof beam lifting cylinder is connected to the basic frame base, and the upper end of the roof beam lifting cylinder is connected to the roof beam. The four corners of the top of the roof beam are respectively installed with roof connecting columns through roof connecting column lifting cylinders. The tops of the two first roof connecting columns and the two second roof connecting columns are respectively provided with a roof connecting cross beam. The rear track telescopic mechanism is horizontally penetrated through the roof beam, and one end of the rear track telescopic mechanism is installed with a rear compensation track.

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

7. The suspended rail reciprocating advanced support device according to claim 1, characterized in that, The middle frame includes the hoisting trolley track, chain, side top beam, side top beam telescopic sleeve, middle top beam, base, column jack, side top beam telescopic cylinder, and cylinder sleeve. The specific structure is as follows: Column jacks are respectively installed on two oppositely arranged bases, and a side top beam is installed on the upper end of each column jack, wherein: a cylinder sleeve is relatively parallel installed on one side of a side top beam, and the two cylinder sleeves are slidably matched with one side of the telescopic sleeve of the side top beam; a cylinder sleeve is relatively parallel installed on one side of the other side top beam, and the two cylinder sleeves are slidably matched with the other side of the telescopic sleeve of the side top beam; an intermediate top beam is installed in the middle of the telescopic sleeve of the side top beam, and a side top beam telescopic cylinder is arranged between each group of two parallel cylinder sleeves, and the two ends of the side top beam telescopic cylinder are respectively connected with the corresponding side top beam and the intermediate top beam, and a lifting trolley track is installed below the intermediate top beam through a chain.

8. A method of using the suspended rail reciprocating advanced support device according to any one of claims 1 to 7, characterized in that, The working state A and the movable state B are cyclically alternated to realize dynamic support of the roof of the underground coal mine tunnel.

9. The usage method of the suspended rail reciprocating advanced support device according to claim 8, characterized in that, Working state A: The top beam of the intermediate frame extends upward and is in close contact with the roof of the tunnel to provide top support and provide stable support for the tunnel; the hoisting trolley tracks on adjacent intermediate frames are connected one by one to form a complete suspension track. The hoisting trolley can move back and forth between the intermediate frames along this suspension track to provide continuous and stable support for the roofs in different areas.

10. The method of using the suspended rail reciprocating advanced support device according to claim 8, characterized in that, Movable state B: When the coal mining machine completes the coal wall cutting from the tail of the machine and the scraper conveyor moves forward, the device enters this state; first, the front basic frame lowers the top part and uses the crawler assembly on it to drive itself forward, and then the front compensation track is retracted through the front track telescopic mechanism, thereby freeing up enough space for the intermediate frame to be moved forward; Subsequently, the lifting trolley starts to work and lifts the intermediate frame in the last position to the front for installation; first remove the lifting trolley track connecting pin of the rear intermediate frame, and lower the intermediate frame to a height that the lifting trolley can connect; at the same time, the rear compensation track of the rear basic frame extends out and connects with the corresponding lifting trolley track; the lifting trolley moves to the top of the intermediate frame, connects with the intermediate frame through the hanger, and then retracts the base of the intermediate frame in the horizontal direction, retracts the side top beam laterally, and then completely retracts the base, starts the rotary reducer of the lifting trolley, and lifts the intermediate frame to the front; in this process, the rear basic frame moves synchronously, lowers the top connection part, and The assembly drives itself forward, then lifts the top-connecting part, uses the rear track telescopic mechanism to push the rear compensation track out, and connects it with the lifting trolley track on the corresponding intermediate frame; the lifting trolley transports the rear intermediate frame to between the front basic frame and the front intermediate frame, horizontally unfolds the side top beams of the intermediate frame, drops the base of the intermediate frame to the ground, disconnects the connection between the lifting trolley's hanger and the intermediate frame, moves the lifting trolley to the middle position of the hanging rail, lifts the top-connecting part of the intermediate frame, and the two ends of the lifting trolley track on the intermediate frame are respectively docked with the corresponding front compensation track and the lifting trolley track. At this point, the device re-enters working state A and continues to support the top plate.

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