Interframe protection device for hydraulic support in extremely thin coal seam

Abstract

The application discloses an inter-stand protection device of an ultra-thin coal seam hydraulic support, and belongs to the technical field of the ultra-thin coal seam hydraulic support, which comprises a movable installation of the inter-stand protection device on the bottom of a top beam of the hydraulic support close to a front end portion and is capable of moving along the length direction of the top beam within a predetermined range, wherein a sliding support block is arranged below the top beam along the length direction of the top beam, the sliding support block is capable of moving within a predetermined length range, a support assembly is arranged on at least one side of the sliding support block and extends to one side of the top beam, and the movable side guard plate on one side of the top beam is supported when the inter-stand gap of the hydraulic support is eliminated and the movable side guard plate moves, especially the part of the movable side guard plate that is suspended is supported, meanwhile, the flying gangue and dust are blocked, and the hydraulic support is protected.

Description

Technical Field

[0001] This invention belongs to the technical field of ultra-thin coal seam hydraulic support, and particularly relates to an inter-support protection device for ultra-thin coal seam hydraulic supports. Background Technology

[0002] my country possesses abundant coal resources, but coal seams exhibit diverse occurrences. Generally, a thickness of 1.3m or 0.8m is used as a boundary; seams less than 1.3m thick are collectively referred to as thin coal seams, while those less than 0.8m are considered extremely thin coal seams. These are widely distributed, particularly in the southwest, east, and northeast regions where thin coal seam reserves are more prominent. The mining of extremely thin coal seams is of great significance for resolving the contradiction between mining continuity, improving resource recovery rates, and alleviating regional coal supply and demand imbalances.

[0003] Hydraulic supports are crucial support equipment in my country's coal mining, playing a vital role in the mining of extremely thin coal seams. The top beam of the hydraulic support supports the roadway roof. During installation, the movable side guards on the sides of the top beam need to be adjusted to shorten the gaps between the hydraulic supports. This supports the roof while preventing rockfall and dust from entering the hydraulic support columns and causing expansion and contraction failures. However, when the side guards move between supports and close the gaps, some sections become suspended, resulting in ineffective roof support. Under sudden increases in roof pressure, these sections are prone to detaching from the top beam. Furthermore, during coal mining, flying rock can easily damage the hydraulic supports. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the present invention provides an inter-frame protection device for ultra-thin coal seam hydraulic supports. The device supports the movable side plate of the top beam between the hydraulic supports, especially the suspended part of the movable side plate, while blocking flying rock and dust, thus protecting the hydraulic supports and solving the problems in the background art.

[0005] The technical solution adopted in this invention is as follows: an inter-support protection device for an ultra-thin coal seam hydraulic support, wherein the inter-support protection device is movably installed at the bottom of the hydraulic support top beam near the front end and can be displaced along the length of the top beam within a predetermined range, including a sliding support block that displaces below the top beam along the length of the top beam. The sliding support block displaces within a predetermined length range, and a support component is installed on at least one side of the sliding support block and extends out of one side of the top beam. When the movable side guard plate of the top beam eliminates the inter-support gap of the hydraulic support and displaces, it supports the movable side guard plate on one side of the top beam.

[0006] Furthermore, a blocking component is assembled at the bottom of the sliding support block. The upper end of the blocking component is suspended from the bottom of the sliding support block by a hanging ring, and the lower end of the blocking component is movably mounted on the side plate of the scraper conveyor connected to the hydraulic support by a clamping component. The blocking component has a predetermined elastic deformation capability. As the scraper conveyor moves and the top beam rises and falls, the upper and lower ends respectively adapt to changes in position and deformation, unfolding on the front side of the hydraulic support to prevent flying coal generated during coal mining from damaging the hydraulic support and to filter the dust generated from entering the column.

[0007] Furthermore, the clamping assembly includes an inverted U-shaped clamp and a fastening bolt located on one side wall of the clamp. The clamp is clamped on both sides of the scraper conveyor side plate, and the clamp is fixed to the side plate by the fastening bolt.

[0008] Furthermore, the blocking assembly includes a barrier plate, which is suspended from the bottom of the sliding support block by a hanging ring and moves with the sliding support block. An elastic net is fixedly connected to the bottom of the barrier plate and is connected to one side of the clamping assembly. When the side plate of the scraper conveyor is pushed, the elastic net undergoes a predetermined deformation to block dust and flying debris.

[0009] Furthermore, an energy-absorbing airbag is fixedly mounted on the rear side of the barrier plate to absorb energy and unload force when impacted by flying debris, thereby slowing down the impact speed of the flying debris and separating the electrical components inside the hydraulic support from the barrier plate.

[0010] Furthermore, the support assembly includes a connecting plate fixedly mounted on one side of the sliding support block. One end of the connecting plate extends out of a predetermined distance from one side of the top beam. A pressure support plate is erected above the extended end of the connecting plate via a telescopic rod. Both ends of the pressure support plate extend along the length of the top beam, supporting the movable side guard plate on the side of the top beam from below.

[0011] Furthermore, the upper end face of the pressure support plate is recessed to form an elongated movable groove. Rollers are installed at intervals along the length of the top beam in the movable groove to form a support surface with a low coefficient of friction. A pressure sensor is installed inside the support surface. The pressure sensor is electrically connected to the control system of the hydraulic support to monitor the pressure of the top plate borne by the movable side plate.

[0012] Furthermore, the fixing cylinder of the telescopic rod is fixed to the bottom of the connecting plate, the telescopic end extends out of the upper end of the connecting plate, and a support spring is fixedly mounted on the connecting plate. The support spring is located between the bottom of the pressure support plate and the upper end of the connecting plate, and the support spring is located on both sides of the telescopic end of the telescopic rod.

[0013] Furthermore, flexible baffles are arranged in an array at intervals on both sides of the barrier plate. The flexible baffles extend between the hydraulic support frames, and the flexible baffles on both sides of the barrier plate are arranged in an alternating pattern to form an alternating flexible barrier area between the two sets of hydraulic support frames.

[0014] Furthermore, a fixed vertical plate is fitted at the bottom of the top beam of the hydraulic support, and a support crossbar is set between the fixed vertical plates. The sliding support block moves along the support crossbar, and the range of movement of the sliding support block is limited between the fixed vertical plates. A compression spring is wound around the support crossbar, and the compression springs are respectively placed on both sides of the sliding support block to prevent the sliding support block from suddenly accelerating along the support crossbar.

[0015] The beneficial effects of the present invention after adopting the above structure are as follows:

[0016] (1) By setting the sliding support block and the support component installed on the side of the sliding support block, the movable side guard plate of the top beam is supported, avoiding the problem of insufficient support force of the suspended movable side guard plate, and increasing the allowable error of the distance between the hydraulic support frames;

[0017] (2) By setting up the blocking components, the flying gangue and dust generated during the coal mining process are blocked to prevent the flying gangue from damaging the hydraulic support and to block the dust from entering the column (hydraulic column); the blocking components can move with the position of the scraper conveyor to avoid the blocking gap between the scraper conveyor and the hydraulic support, and the blocking components can deform to a certain extent and act as the driving force for the displacement of the sliding support block during the displacement process;

[0018] (3) When the hydraulic support pushes the scraper conveyor, the barrier plate connected by the elastic net is pulled by the elastic net, and the barrier plate pulls the sliding support to move. When the sliding support block moves, the sudden acceleration displacement of the sliding support block is avoided by the compression spring. At the same time, the connecting plate carries the pressure support plate to move. The support surface of the pressure support plate monitors the pressure and provides an early warning of the top plate situation. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0020] Figure 1 This is a schematic diagram of the overall structure of an inter-support protection device for an ultra-thin coal seam hydraulic support proposed in this invention;

[0021] Figure 2 This is a side view of an inter-support protection device for an ultra-thin coal seam hydraulic support proposed in this invention;

[0022] Figure 3This is a schematic diagram of the overall structure of an ultra-thin coal seam hydraulic support inter-frame protection device proposed in this invention from another angle;

[0023] Figure 4 This is a diagram showing the state of the movable side guard plate when the inter-frame protection device of the ultra-thin coal seam hydraulic support proposed in this invention is supporting it.

[0024] In the attached diagram: 1. Top beam, 2. Movable side guard plate, 3. Sliding support block, 4. Hanging ring, 5. Clamp, 6. Fastening bolt, 7. Barrier plate, 8. Elastic net, 9. Energy-absorbing airbag, 10. Connecting plate, 11. Pressure support plate, 12. Telescopic rod, 13. Movable groove, 14. Roller, 15. Support spring, 16. Flexible stop, 17. Fixed vertical plate, 18. Support crossbar, 19. Compression spring, 20. Connecting rod. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Example 1

[0028] In the mining of extremely thin coal seams, when installing hydraulic supports, the movable side guard plate 2 on the side of the hydraulic support top beam 1 is moved and adjusted to shorten the gap between the hydraulic supports and to prevent gangue and dust from falling from the roof into the hydraulic supports. However, after the adjustment, part of the movable side guard plate 2 is suspended, resulting in insufficient support for the roof. Based on this, the inventors proposed a protective device between hydraulic supports in extremely thin coal seams, such as... Figures 1-4As shown, a sliding support block 3 is movably installed at the bottom of the hydraulic support top beam 1 near the front end and can be displaced along the length of the top beam 1 within a predetermined range. The sliding support block 3 is displaced below the top beam 1 along the length of the top beam 1. The sliding support block 3 is displaced within a predetermined length range. A support assembly is installed on at least one side of the sliding support block 3 and extends out of one side of the top beam 1. When the movable side guard plate 2 of the top beam 1 eliminates the gap between the hydraulic support frames and displaces, it supports the movable side guard plate 2 on one side of the top beam 1.

[0029] The support assembly includes a connecting plate 10 fixedly mounted on one side of the sliding support block 3. One end of the connecting plate 10 extends a predetermined distance from one side of the top beam 1, so that the pressure support plate 11 is placed below the movable side guard plate 2. The pressure support plate 11 is supported above the extended end of the connecting plate 10 by a telescopic rod 12. Both ends of the pressure support plate 11 extend along the length direction of the top beam 1, supporting the movable side guard plate 2 on the side of the top beam 1 from below. In this embodiment, preferably, the fixing cylinder of the telescopic rod 12 is fixed to the bottom of the connecting plate 10, the telescopic end extends out of the upper end of the connecting plate 10, and a support spring 15 is fixedly mounted on the connecting plate 10. The support spring 15 is located between the bottom of the pressure support plate 11 and the upper end of the connecting plate 10, and the support spring 15 is located on both sides of the telescopic end of the telescopic rod 12.

[0030] It should be noted that the upper end face of the pressure support plate 11 is recessed to form an elongated movable groove 13. Roller shafts 14 are installed at intervals along the length of the top beam 1 in the movable groove 13 to form a support surface with a low coefficient of friction. A pressure sensor is installed inside the support surface. The pressure sensor is electrically connected to the control system of the hydraulic support to monitor the pressure of the top plate borne by the movable side plate.

[0031] In designing the installation method of the sliding support block 3, in this embodiment, it is preferable that a fixed vertical plate 17 is assembled at the bottom of the top beam 1 of the hydraulic support, and a support crossbar 18 is arranged between the fixed vertical plates 17. The sliding support block 3 moves along the support crossbar 18, and the range of movement of the sliding support block 3 is limited between the fixed vertical plates 17. A compression spring 19 is wound around the support crossbar 18, and the compression spring 19 is respectively placed on both sides of the sliding support block 3 to prevent the sliding support block 3 from suddenly accelerating along the support crossbar 18.

[0032] Example 2

[0033] Furthermore, based on Embodiment 1, in order to solve the problem of flying coal and dust entering the hydraulic support during coal mining, the inventors, starting from this point, installed a blocking component at the bottom of the sliding support block 3. The upper end of the blocking component is suspended from the bottom of the sliding support block 3 by a hanging ring 4, and the lower end of the blocking component is movably mounted on the side plate of the scraper conveyor connected to the hydraulic support by a clamping component. The blocking component has a predetermined elastic deformation capacity. As the scraper conveyor moves and the top beam 1 rises and falls, the upper and lower ends adapt to changes in position and deformation, unfolding on the front side of the hydraulic support to prevent flying coal from damaging the hydraulic support and to filter the generated dust from entering the column. Specifically... In this embodiment, preferably, the blocking component includes a barrier plate 7, which can be made of rubber or rubber material. The barrier plate 7 is suspended from the bottom of the sliding support block 3 by a hanging ring 4 and moves with the sliding support block 3. An elastic net 8 is fixedly connected to the bottom of the barrier plate 7. The elastic net 8 is formed of rubber material with a certain elastic deformation capability. The elastic net 8 is connected to one side of the clamping component. When the side plate of the scraper conveyor is pushed, the elastic net 8 undergoes a predetermined deformation to block dust and flying debris. Furthermore, an energy-absorbing airbag 9 is fixedly installed on the rear side of the barrier plate 7 to absorb energy and unload force when impacted by flying debris, reduce the impact speed of flying debris, and separate the electrical components inside the hydraulic support from the barrier plate 7.

[0034] The clamping assembly includes an inverted U-shaped clamp 5 and a fastening bolt 6 located on one side wall of the clamp 5. The clamp 5 is clamped on both sides of the scraper conveyor side plate, and the clamp 5 is fixed to the side plate by the fastening bolt 6.

[0035] It should be noted that flexible baffles 16 are arranged in a vertically spaced array on both sides of the barrier plate 7. The flexible baffles 16 extend between the hydraulic support frames, and the flexible baffles 16 on both sides of the barrier plate 7 are arranged in a staggered manner, forming a staggered flexible barrier area between the two sets of hydraulic support frames. In addition, a flexible connecting rod 20 is provided at the upper end of the barrier plate 7, and the connecting rod 20 is connected to the lower part of the connecting plate 10.

[0036] In practical use, after the hydraulic support is installed on site, the second set of hydraulic support is installed. Between the two sets of hydraulic support frames, the position of the movable side guard plate 2 is adjusted to shorten the gap, and the pressure support plate 11 is lifted at the bottom of the movable side guard plate 2 using the telescopic rod 12 to support the movable side guard plate 2. The elastic net 8 is fixed to the side plate connecting the scraper conveyor and the hydraulic support by the clamp 5. When the hydraulic support pushes the scraper conveyor, the barrier plate 7 connected to the elastic net 8 is pulled by the elastic net 8. The barrier plate 7 pulls the sliding support displacement. When the sliding support block 3 moves, the compression spring 19 prevents the sliding support block 3 from suddenly accelerating. At the same time, the connecting plate 10 carries the pressure support plate 11 to displacement. The support surface of the pressure support plate 11 monitors the pressure and provides early warning of the roof condition. During coal mining, the elastic net and the barrier plate 7 block flying gangue and isolate dust.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents. In conclusion, if those skilled in the art, inspired by this description, design similar structural methods and embodiments without departing from the inventive spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A protective device between supports of an ultra-thin coal seam hydraulic support, characterized in that, The inter-frame protection device is movably installed at the bottom of the hydraulic support top beam near the front end and can be displaced along the length of the top beam within a predetermined range. It includes a sliding support block that displaces below the top beam along the length of the top beam. The sliding support block displaces within a predetermined length range. A support assembly is installed on at least one side of the sliding support block and extends out of one side of the top beam. When the movable side guard plate of the top beam eliminates the inter-frame gap of the hydraulic support and displaces, it supports the movable side guard plate on one side of the top beam. The bottom of the sliding support block is equipped with a blocking component. The upper end of the blocking component is suspended from the bottom of the sliding support block by a hanging ring. The lower end of the blocking component is movably mounted on the side plate of the scraper conveyor connected to the hydraulic support by a clamping component. The blocking component has a predetermined elastic deformation capacity. As the scraper conveyor moves and the top beam rises and falls, the upper and lower ends respectively adapt to change position and deform, unfolding on the front side of the hydraulic support to prevent flying coal generated during coal mining from damaging the hydraulic support and to filter the generated dust from entering the column. The support assembly includes a connecting plate fixedly mounted on one side of the sliding support block. One end of the connecting plate extends a predetermined distance beyond one side of the top beam. A pressure support plate is mounted above the extended end of the connecting plate via a telescopic rod. Both ends of the pressure support plate extend along the length of the top beam to support the movable side guard plate of the top beam from below. The fixing cylinder of the telescopic rod is fixed to the bottom of the connecting plate, the telescopic end extends out of the upper end of the connecting plate, and a support spring is fixedly mounted on the connecting plate. The support spring is located between the bottom of the pressure support plate and the upper end of the connecting plate, and the support spring is located on both sides of the telescopic end of the telescopic rod. The bottom of the top beam of the hydraulic support is equipped with a fixed vertical plate, and a support crossbar is set between the fixed vertical plates. The sliding support block moves along the support crossbar, and the range of movement of the sliding support block is limited between the fixed vertical plates.

2. The inter-support protection device for ultra-thin coal seam hydraulic supports according to claim 1, characterized in that, The clamping assembly includes an inverted U-shaped clamp and a fastening bolt located on one side wall of the clamp. The clamp is clamped on both sides of the scraper conveyor side plate, and the clamp is fixed to the side plate by the fastening bolt.

3. The inter-support protection device for ultra-thin coal seam hydraulic supports according to claim 1, characterized in that, The blocking assembly includes a barrier plate, which is suspended from the bottom of the sliding support block by a hanging ring and moves with the sliding support block. An elastic net is fixedly connected to the bottom of the barrier plate and is connected to one side of the clamping assembly. When the side plate of the scraper conveyor is pushed, the elastic net undergoes a predetermined deformation to block dust and flying debris.

4. The inter-support protection device for ultra-thin coal seam hydraulic supports according to claim 3, characterized in that: The barrier plate is fixedly fitted with an energy-absorbing airbag on its rear side. When it is impacted by flying debris, the airbag absorbs energy and reduces the impact speed of the flying debris, and separates the electrical components inside the hydraulic support from the barrier plate.

5. The inter-support protection device for ultra-thin coal seam hydraulic supports according to claim 1, characterized in that: The upper end face of the pressure support plate is recessed to form an elongated movable groove. Rollers are installed at intervals along the length of the top beam in the movable groove to form a support surface with a low coefficient of friction. A pressure sensor is installed inside the support surface. The pressure sensor is electrically connected to the control system of the hydraulic support to monitor the pressure of the top plate borne by the movable side plate.

6. The inter-support protection device for ultra-thin coal seam hydraulic supports according to claim 3, characterized in that: Flexible baffles are arranged in an array at intervals on both sides of the barrier plate. The flexible baffles extend between the hydraulic support frames, and the flexible baffles on both sides of the barrier plate are arranged in an alternating pattern to form an alternating flexible barrier area between the two sets of hydraulic support frames.

7. The inter-support protection device for ultra-thin coal seam hydraulic supports according to claim 1, characterized in that: A compression spring is wound around the support crossbar, and the compression spring is placed on both sides of the sliding support block to prevent the sliding support block from suddenly accelerating along the support crossbar.

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