Retractable winged support for fully mechanized coal mining face

Abstract

The utility model is telescopic wing type support of fully mechanized working face, its structure includes roof, base and the telescopic height adjustable front stand and rear stand of connecting both; the roof is constituted by middle fixed roof beam and left and right movable roof beam, and the fixed roof beam front end is equipped with the extensible plate which can extend and contract; the base is constituted by middle fixed floor beam and left and right movable floor beam. The front baffle is hinged with the extensible plate and the length is adjustable, and realizes synchronous expansion through linkage structure; the rear baffle is detachably hinged between the roof and the base, and the height is adjusted through the pull-out type inner plate and outer plate; another height adjustable rear auxiliary baffle is arranged. The support realizes self -adaptation telescopic through the left and right movement of roof beam and floor beam and the multistage linkage of extensible plate and baffle, effectively improves the support flexibility and operation safety, ensures the dynamic controllability of coal mining space, and adapts to the efficient fully mechanized mining demand under complex geological conditions.

Description

Technical Field

[0001] This utility model relates to a coal mining equipment, and more particularly to a retractable wing-type hydraulic support for fully mechanized mining faces. Background Technology

[0002] As fully mechanized mining operations move towards intelligent and efficient development, traditional hydraulic supports have revealed problems such as poor adaptability and low support efficiency when dealing with dynamic changes in the length of the working face. Especially during the advancement of working faces of unequal length, the end and middle supports of the supports are difficult to adjust synchronously, easily creating support blind spots and increasing the risk of roof collapse. Existing supports mostly adopt fixed structures with poor self-adaptability, failing to adjust the support range before and after the face according to the complex conditions of the coal mining face, thus affecting safe production. Therefore, there is an urgent need for a hydraulic support structure with multi-degree-of-freedom adjustment capabilities, capable of real-time expansion and contraction as the working face advances, to improve the flexibility and reliability of the support system and meet the needs of efficient fully mechanized mining operations under complex geological conditions. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a telescopic wing-type support for fully mechanized mining faces.

[0004] The present invention relates to a telescopic wing-type support for a fully mechanized mining face, comprising a top plate and a base.

[0005] The rear is defined as the side closest to the goaf during operation, the front is the side facing the coal face, the left is the side adjacent to the roadway, and the right is the side adjacent to the hydraulic support.

[0006] The top plate consists of a fixed top beam in the middle and movable top beams on the left and right sides of the fixed top beam that can move in the left and right directions.

[0007] The base consists of a fixed base beam in the middle and movable base beams on the left and right sides of the fixed base beam that can move in the left and right directions.

[0008] And a telescopic, height-adjustable front column and a rear column connecting the top plate and the base; the upper and lower ends of the front column are hinged to the top plate and the base respectively; the upper end of the rear column is hinged to the top plate.

[0009] The fixed top beam has an extension plate at its front end that can be extended and retracted.

[0010] It has a front baffle, one edge of which is hinged to the front edge of the extension plate;

[0011] The hinged edge of the front baffle is the first side of the front baffle, and the side opposite to the first side of the front baffle is the second side of the front baffle. The length from the first side of the front baffle to the second side of the front baffle is adjustable.

[0012] It has a rear baffle; the lower edge of the rear baffle is detachably hinged to the base, and the upper edge of the rear baffle is detachably hinged to the top plate, and at least one of the lower edge and the upper edge of the rear baffle is kept in a hinged state; the width between the lower edge and the upper edge of the rear baffle is adjustable.

[0013] As described above, in the telescopic wing-type support for the fully mechanized mining face, the fixed top beam includes a cover plate, with a left movable beam and a right movable beam located to the left and right below the cover plate, respectively; a top plate groove is provided between the left and right movable beams, and a top plate connecting plate is installed in the top plate groove to connect the left and right movable beams.

[0014] As described above, the telescopic wing-type support for the fully mechanized mining face has a hollow structure for the left and right movable beams. The plates on the left and right sides of the extension plate are inserted into the left and right movable beams, and the middle plate is inserted into the top plate groove below the cover plate. The plates on the left and right sides and the middle plate are fixed as a whole at the front edge by a crossbeam.

[0015] The upper edges of the opposite surfaces at the front ends of the left and right movable beams are provided with recessed extension plate grooves, which cooperate with the left and right side plates of the extension plate to slide.

[0016] As mentioned above, in the telescopic wing-type support of the fully mechanized mining face, the top plate connecting plate is located below the slide groove of the extension plate, and the top plate connecting plate is fixed to the left and right movable beams by bolts.

[0017] An extension plate push-pull rod is installed inside the top plate groove, and an extension plate push-pull rod hinge seat is provided on the top plate connecting plate.

[0018] One end of the extension plate push-pull rod is connected to the extension plate push-pull rod hinge seat, and the other end is connected to the fixed seat set below the crossbeam.

[0019] As described above, the telescopic wing-type support for the fully mechanized mining face includes a front baffle consisting of a lower plate and an upper plate that are overlapped and nested. The upper plate has guide grooves on both sides, and the lower plate has both sides nested into the guide grooves and sliding with them. A front baffle pushing cylinder is provided, with one end hinged to the lower plate and the other end hinged to the front edge of the upper plate. Through telescopic movement, the upper plate is driven to slide along the guide groove.

[0020] As mentioned above, in the telescopic wing-type support for the fully mechanized mining face, a connecting short arm is provided near the edge of the extension plate on the lower plate, and a connecting short arm hinge seat is provided on the lower surface of the crossbeam. The connecting short arm is connected to the connecting short arm hinge seat through a pin, so that the front baffle and the extension plate form a linkage structure.

[0021] It is equipped with a front baffle linkage push-pull rod, one end of which is connected to the lower surface of the extension plate and the other end is connected to the lower plate of the front baffle. The front baffle is opened or closed synchronously with the extension plate.

[0022] It is equipped with a front baffle hydraulic cylinder.

[0023] A front baffle cylinder hinge seat is provided on the lower surface of the extension plate, and one end of the front baffle cylinder is mounted on the front baffle cylinder hinge seat.

[0024] A front baffle tilting hinge is provided at the rear edge of the lower plate, and the other end of the front baffle cylinder is connected to the tilting hinge.

[0025] As described above, in the telescopic wing-type support for the fully mechanized mining face, a rear baffle tilting cylinder hinge seat is provided in the top plate groove. One end of the rear baffle tilting cylinder is connected to the rear baffle tilting cylinder hinge seat, and the other end is hinged to the rear baffle. It is used to install and push the rear baffle to rotate along one of the rear ends of the fixed bottom beam and the fixed top beam.

[0026] As mentioned above, in the telescopic wing-type support for the fully mechanized mining face, the rear baffle is a pull-out structure, including an inner plate and an outer plate. The inner plate is nested in the outer plate and can slide out or retract along its height direction.

[0027] A rear panel telescopic cylinder is designed between the outer panel and the inner panel. One end of the rear panel telescopic cylinder is connected to the outer panel, and the other end is connected to the lower edge of the inner panel. The telescopic movement drives the inner panel to slide relative to the outer panel.

[0028] The telescopic wing-type support for the fully mechanized mining face described above includes a rear auxiliary baffle, with its upper end hinged to the movable top beam and its lower end hinged to the movable bottom beam; the height of the rear auxiliary baffle is adjustable.

[0029] As mentioned above, the telescopic wing-type support for the fully mechanized mining face has a pull-out structure for the rear auxiliary baffle, which includes an inner plate and an outer plate. The inner plate is nested inside the outer plate and can extend and retract in the vertical direction.

[0030] The beneficial effects of this invention are as follows: it enables the adaptive extension and retraction of the support at the coal mining face, effectively improving support flexibility and operational safety; through multi-level linkage and synchronous action of the front baffle, extension plate, and rear baffle, it ensures dynamic controllability of the coal mining space; the combination of a pull-out structure and hydraulic cylinder drive allows each baffle to adjust its position and height according to working conditions, enhancing the shielding effect; the overall structure is compact and the actions are coordinated, significantly improving the efficiency of fully mechanized mining and adaptability to complex geological conditions. Simultaneously, the coordinated design of the front baffle hydraulic cylinder and extension plate enables automatic deployment and retraction of the front support, significantly reducing the operational risks for workers on the coal face side; the height adjustment function of the rear auxiliary baffle, combined with the pull-out structure, can flexibly adapt to different mining height requirements, improving the sealing of the roof collapse zone at the tail end. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the telescopic wing-type support for the fully mechanized mining face of the present invention.

[0032] Figure 2This is a partially enlarged view of the linkage structure between the front baffle and the extension plate.

[0033] Figure 3 This is a partial schematic diagram of the rear bumper and rear auxiliary bumper;

[0034] Figure 4 This is a partial schematic diagram of the rear bumper and rear auxiliary bumper from another angle.

[0035] The components include: front baffle 1; rear baffle 2; auxiliary baffle 3; top plate 4; bottom plate 5; front column 6; rear column 7; movable beam 8; fixed top beam 9; upper plate 10; lower plate 11; front plate telescopic push-pull rod 12; short arm 13; front baffle flip push-pull rod 14; guide groove 15; extension plate push-pull rod 16; top plate connecting plate 17; crossbeam 18; and extension plate 19.

[0036] Outer panel 20; Inner panel 21; Edge panel 23; Rear panel telescopic push-pull rod 24; Rear baffle upper hinge seat 25; Rear baffle lower hinge seat 26; Inner piece 30; Outer piece 31. Detailed Implementation

[0037] In the description of the embodiments of this patent, terms related to location such as "front end," "rear end," "upper part," and "lower part" are used, all of which are attached to the appendix. Figure 1 The positional relationship of the supports relative to the coal mining direction under normal working conditions in the structure shown is a reference, and not a limitation on the scope of protection of this invention. Specifically, during operation, the side closer to the goaf is considered rear, the side facing the coal face is considered front, the side adjacent to the roadway is considered left, and the side adjacent to the hydraulic support is considered right; this defines the spatial layout and movement direction of each component.

[0038] The telescopic wing-type support for fully mechanized mining faces of this utility model includes a roof plate assembly that bears the pressure of the roof plate, a base assembly that provides bottom support, and a column support system that connects the two.

[0039] The top plate consists of a fixed top beam 9 in the middle and movable top beams on the left and right sides of the fixed top beam 9 that can move in the left and right directions.

[0040] The base consists of a fixed base beam in the middle and movable base beams on the left and right sides of the fixed base beam that can move in the left and right directions.

[0041] The column support system base consists of a fixed base beam 9 in the middle and movable base beams on the left and right sides of the fixed base beam 9 that can move in the left and right directions.

[0042] The front uprights are hinged at their upper and lower ends to the upright cap at the bottom of the roof and the upright socket at the top of the base via hinge seats, with a hinge angle range of ±15°. The rear upright is connected to the roof at its upper end via a hinge seat, and to the base at its lower end via a fixed hinge, forming a triangular stable support structure. The two sets of uprights work together to achieve stepless adjustment of the roof height from 1.8 to 4.5 meters. Through the coordinated action of the upright support system, both the spacing and angle between the roof and the base can be adjusted to adapt to the roof support requirements of coal seams with different dip angles, ensuring the stability of the support structure.

[0043] The stability and load-bearing capacity of the support under complex geological conditions are ensured. The electro-hydraulic control system precisely drives the expansion and contraction of the movable top and bottom beams, and, in conjunction with the column pressure feedback mechanism, achieves dynamic balance of support resistance. Due to changes in the height of the coal face, gradual adjustment of the support height is required during transitional sections to prevent roof collapse caused by sudden changes in roof stress. At this time, the double expansion and contraction structure of the rear column extends or shortens synchronously under the command of the electro-hydraulic control system, and, in conjunction with the hinge angle of the front column, adaptively adjusts the inclination and height of the roof, ensuring optimal support between the roof and the base at all times.

[0044] Example 1:

[0045] The fixed top beam 9 includes a cover plate, with a left movable beam 8 and a right movable beam located to the left and right below the cover plate, respectively. A top plate groove is provided between the left movable beam 8 and the right movable beam, and a top plate connecting plate is installed in the top plate groove to connect the left movable beam 8 and the right movable beam. Multiple top plate connecting plates are connected and fixed to the left and right movable beams by bolts to ensure the stability and torsional resistance of the overall structure.

[0046] The extension plate is set at the front end of the fixed top beam 9. The extension plate can extend forward or retract to adapt to the coal wall advance speed and support the newly exposed roof area in a timely manner.

[0047] The left movable beam 8 and the right movable beam are hollow structures. The plates on the left and right sides of the extension plate have the same width as the hollow structure and a length of about 30% of the length of the fixed top beam 9. The plates on both sides are embedded in the hollow structure of the left and right movable beams and achieve sliding fit.

[0048] The middle plate of the extension plate is inserted into the groove of the top plate, below the cover plate and above the top plate connecting plate (there is a gap between the bottom of the cover plate and the top plate connecting plate). This gap provides space for the extension plate to slide back and forth. The left and right plates and the middle plate are fixed as a whole at the front edge by a crossbeam. In order to enhance the strength of the extension plate, the inner cavity height of the hollow structure is set at 10cm. The thickness of the left and right plates of the extension plate is slightly less than the inner cavity height of the hollow structure. Therefore, the left and right plates of the extension plate can actually be a rectangular box structure with reinforcing ribs inside to improve bending resistance. The outer surface of the box forms a sliding fit with the inner wall of the hollow structure, which actually constitutes a drawer-type telescopic structure with the hollow structure.

[0049] The left and right movable beams 8 and 8 have recessed extension plate grooves on their upper edges near the front ends of their opposite faces. The left and right side plates of the extension plate slide in cooperation with these grooves. Specifically, the front ends of the left and right movable beams 8 and 8 have lips formed by reinforcing ribs, and the edges of these lips have notches that function as extension plate grooves. These notches fit into the left and right side plates of the extension plate.

[0050] An extension plate push-pull rod is installed within the top plate groove. A hinge seat for the extension plate push-pull rod is located on one of the top plate connecting plates, approximately 30% of the length of the front end of the top plate within the top plate groove. One end of the extension plate push-pull rod is connected to the hinge seat, and the other end is connected to a fixed seat located below the crossbeam. The fixed seat below the crossbeam protrudes approximately 15cm from below the crossbeam. The extension plate push-pull rod is parallel to the fixed top beam 9, facilitating smooth extension and retraction of the extension plate. Driven by a hydraulic cylinder, the extension plate push-pull rod moves the crossbeam back and forth, thus achieving synchronous extension and retraction of the entire extension plate. Therefore, the connection between the two ends of the extension plate push-pull rod requires leveling using the fixed seat below the crossbeam and the hinge seat.

[0051] One example is a design with two extension plate push-pull rods arranged in parallel, symmetrically positioned on both sides of the top plate groove near the left movable beam 8 and the right movable beam, respectively. The two extension plate push-pull rods ensure uniform force distribution and synchronized extension and retraction, effectively preventing the extension plate from tilting during movement.

[0052] The extension plate can extend to a length of 30-50cm, and the extension plate push-pull rod has a stroke of 40-60cm.

[0053] Equipped with a front baffle, which is a further extension of the support based on the extension plate 19, the front baffle 1 is used to prevent coal fragments or rocks generated by coal wall spalling from flowing into the working area in front of the support, ensuring the safety of personnel and equipment. The cooperation of the extension plate 19 and the front baffle 1 effectively covers the area of ​​the newly exposed roof 4 after the coal mining machine cuts the coal. When the front baffle 1 is unfolded and in a horizontal position parallel to the roof 4, the side closer to the coal wall of the working face is the second side of the front baffle 1, the plate closer to the coal wall is the upper plate 10 of the front baffle 1, and the plate closer to the extension plate 19 is the lower plate 11.

[0054] One edge of the front baffle 1 is hinged to the front edge of the extension plate 19; the front baffle 1 can be adjusted in the range of 0° to 90° by the front baffle flipping push rod 14 (0° is the state when the top plate 4 is parallel and basically at the same horizontal plane, and 90° is the state when the second side of the front baffle 1 hangs down to form a right angle with the top plate 4); when the coal mining machine passes, the front baffle 1 is quickly unfolded under the push of the front baffle flipping push rod 14, covering the newly exposed area of ​​the top plate 4, effectively preventing spalling and collapse.

[0055] The first side of the front baffle 1 is hinged to the extension plate 19, and the second side of the front baffle 1 is opposite to the first side of the front baffle 1. The length from the first side to the second side of the front baffle 1 is adjustable. Specifically, the front baffle 1 is composed of a lower plate 11 and an upper plate 10 that are overlapped and nested. The upper plate 10 has guide grooves 15 on both sides (formed by rolling or adding guide grooves 15). The two sides of the lower plate 11 are nested into the guide grooves 15 and slide with them. A front plate telescopic push-pull rod 12 is provided, one end of which is hinged to the lower plate 11 near the first side, and the other end is hinged to the front edge of the upper plate 10. The telescopic action drives the upper plate 10 to slide along the guide grooves 15.

[0056] The connecting short arm 13 is located on the lower surface of the lower plate 11 and extends towards the lower surface of the crossbeam 18, forming a 45° angle with the lower plate 11. The lower surface of the crossbeam 18 is provided with a connecting short arm hinge seat. The connecting short arm 13 is connected to the connecting short arm hinge seat through a pin, so that the front baffle 1 and the extension plate form a linkage structure.

[0057] A front baffle linkage push-pull rod is provided, with one end connected to the lower surface of the extension plate and the other end connected to the lower plate 11 of the front baffle 1. The rod extends forward and expands or retracts backward and closes in sync with the extension plate.

[0058] A front baffle push-pull rod is provided, and a front baffle push-pull rod hinge seat is provided on the lower surface of the extension plate. One end of the front baffle push-pull rod is installed on the front baffle push-pull rod hinge seat, and a front baffle flip hinge seat is provided at the rear edge of the lower plate 11. The other end of the front baffle push-pull rod is connected to the flip hinge seat. Therefore, the front baffle push-pull rod and the front baffle push-pull rod hinge seat move synchronously with the extension plate as it extends forward or retracts backward. The front baffle flip hinge seat together constitute the flipping drive mechanism of the front baffle 1. By controlling the extension and retraction of the front baffle push-pull rod, the front baffle 1 is driven to rotate around the flip hinge seat; the flipping angle of the front baffle 1 is adjustable between a horizontal position parallel to the top plate 4 and a vertical position perpendicular to the top plate 4. Under the push of the front baffle push-pull rod, the extension and retraction length of the upper plate 10 is 0 to 0.5 meters, realizing the dynamic adjustment of the overall length of the front baffle 1 to adapt to the coverage requirements of the top plate 4 under different cutting progress.

[0059] Example 2:

[0060] The system includes a rear baffle 2. The lower edge of the rear baffle 2 is detachably hinged to the base. An upwardly protruding lower rear baffle hinge seat 26 is provided on the upper surface of the rear end of the fixed bottom beam of the base. A rear baffle lower hinge seat hinge lug is provided near the lower edge of the rear baffle 2 (approximately 10cm away) and connected to the rear baffle lower hinge seat 26 by a pin, allowing the rear baffle 2 to rotate around the hinge point. Similarly, a downwardly protruding upper rear baffle hinge seat 25 is provided on the lower surface of the rear end of the fixed top beam 9. A rear baffle upper hinge seat hinge lug 25 is provided at the upper edge of the rear baffle 2 and connected by a pin, forming a rotation fulcrum on the upper part of the rear baffle 2. The rear baffle 2 can be hinged on one side (lower edge or upper edge) or both sides. For example, when both sides are hinged, the rear baffle 2 is vertically positioned to fully resist the pressure of gangue from the goaf. In this case, the rear baffle 2 forms a stable support structure, effectively preventing gangue from entering the working face. When the upper side is hinged and the lower side is not, the rear baffle 2 can be pushed off the support surface by the rear baffle flipping push rod 14, allowing it to flip upwards and facilitating the smooth sliding of gangue during roof caving operations. When the lower side is hinged and the upper side is not, the rear baffle 2 can tilt towards the goaf side, allowing it to hold back gangue during forward frame movement and preventing accumulated gangue from entering the lower outlet, achieving dynamic protection during frame movement. One end of the rear baffle flipping push rod 14 is hinged to a push rod support on the fixed bottom beam.

[0061] The rear baffle tilting push-pull rod 14 is arranged below the cover body inside the top plate groove. A rear baffle tilting push-pull rod hinge seat is provided on one of the top plate connecting plates 17 inside the top plate groove. One end of the push-pull rod is hinged to it. A tilting drive lug is provided 10cm below the rear baffle hinge lug 25 on the rear baffle 2. It is hinged to the piston rod end of the rear baffle tilting push-pull rod 14 by a pin. When the push-pull rod extends and retracts, it drives the rear baffle 2 to tilt around one of the rear ends of the fixed bottom beam 9 and the fixed top beam 9.

[0062] The width between the lower edge and the upper edge of the rear baffle 2 (based on the arrangement of the rear baffle 2, this width can be understood as the height of the rear baffle 2) is adjustable. The rear baffle 2 is a pull-out structure, including an inner plate 21 and an outer plate 20. The inner plate 21 is nested in the outer plate 20 and can slide out or retract along its height direction. By adjusting the relative position of the inner plate 21 and the outer plate 20, the height of the rear baffle 2 can be dynamically adjusted to adapt to the support requirements of top plates 4 of different thicknesses. The outer plate 20 is on top, and the inner plate 21 is pulled out from top to bottom. The lower hinge lug of the rear baffle is located at the lower edge of the inner plate 21, while the upper hinge lug 25 of the rear baffle is located at the upper edge of the outer plate 20, ensuring that the hinge fulcrum remains effectively connected as the structure expands and contracts. The flip-drive lug is located on the outer plate 20. The width between the left and right sides of the rear baffle 2 is 1.2 meters, which matches the overall width of the support. At the same time, edge plates 23 are also installed on the left and right sides to increase the width of the baffle. Auxiliary baffles 3 can also be added to the upper section on both sides of the rear baffle 2 for fixation. When the impact of the old pond waste is large, spring plates are installed to act as a compression buffer to prevent the rear baffle from being squeezed and deformed.

[0063] The rear baffle 2 is driven by the rear plate telescopic push-pull rod 24 to achieve width adjustment. In conjunction with the telescopic movement of the rear plate telescopic push-pull rod 24, it completes the pull-out movement. Its structure can refer to the structure of "the front baffle 1 consisting of a lower plate 11 and an upper plate 10 that are nested together". The rear plate telescopic push-pull rod 24 pushes the inner plate 21 to slide in the outer plate 20, thereby realizing the dynamic adjustment of the height of the rear baffle 2. One end of the rear plate telescopic push-pull rod 24 is fixedly connected to the middle or top fixed seat of the outer plate 20, and the other end is connected to the lower part of the inner plate 21.

[0064] Example 3:

[0065] A rear auxiliary baffle 3 is provided, with its upper end hinged to the movable top beam 8 and its lower end hinged to the movable bottom beam; the height of the rear auxiliary baffle 3 is adjustable. Instead of a push-pull rod, the rear auxiliary baffle 3 extends and retracts via the lifting action between the top plate 4 and the base. The rear auxiliary baffle 3 is a pull-out structure, comprising an inner piece 30 and an outer piece 31. The inner piece 30 is nested inside the outer piece 31 and can extend and retract vertically. Composed of the nested inner piece 30 and outer piece 31, the inner piece 30 can slide along the outer piece 31 to adjust the overall height. The upper end of the outer piece 31 is hinged to the rear end of the movable top beam 8, and the lower end of the inner piece 30 is hinged to the rear end of the movable bottom beam. As the support rises and falls, the movable top beam 8 and the movable bottom beam move relative to each other. When the top beam rises or falls, it causes the inner piece 30 to extend or retract relative to the outer piece 31. The rear auxiliary baffle 3 increases the protection range of the rear baffle 2, effectively preventing the falling gangue from the top plate 4 from entering the rear of the support. When the movable top beam 8 and the movable bottom beam retract towards the middle (close to the fixed top beam 9 and the fixed bottom beam 9), the rear auxiliary baffle 3 overlaps with the rear baffle 2. In particular, when the movable top beam 8 and the movable bottom beam expand to the left and right, the rear of the movable top beam 8 and the movable bottom beam is mainly closed and protected by the rear auxiliary baffle 3, forming a continuous shielding barrier. Detailed implementation method:

[0067] The working process of the telescopic wing support in this fully mechanized mining face is as follows: In the initial installation stage, the overall width of the support is adjusted to adapt to the length of the working face by the lateral sliding cooperation between the fixed top beam 9 and the movable top beam 8; the front column 6 and the rear column 7 extend and retract synchronously to adjust the height of the roof plate 4 to contact the coal seam roof plate 4 and provide support.

[0068] When the front support range needs to be extended, the extension plate push-pull rod 16 extends under hydraulic drive, pushing the crossbeam 18 to drive the extension plate to slide forward along the extension plate groove. The left and right side plates of the extension plate are smoothly guided within the hollow structure of the left movable beam 8 and the right movable beam. During this process, the connecting short arm 13 forms a lever structure with the connecting short arm hinge seat on the crossbeam 18 through the pin, which, together with the traction action of the front baffle linkage push-pull rod, causes the front baffle 1 to unfold forward synchronously with the extension plate. The extension and retraction of the front baffle push-pull rod can drive the lower plate 11 to rotate around the hinge axis, adjusting the contact angle between the front baffle 1 and the coal wall. The front baffle push-pull rod controls the upper plate 10 to slide along the guide groove 15 of the lower plate 11, further extending the support length.

[0069] For adjusting the support on the goaf side, the rear baffle tilting push-pull rod 14 drives the rear baffle 2 to rotate around the hinge point of the fixed bottom beam 9 or the top plate 4, thereby adjusting the protection angle. When it is necessary to adapt to different mining heights, the rear plate telescopic push-pull rod 24 pushes the inner plate 21 to slide along the height direction of the outer plate 20, changing the overall height of the rear baffle 2. The rear auxiliary baffle 3, through the pull-out structure of the inner plate 30 and the outer plate 31, adaptively adjusts its length when the movable top beam 8 and the movable bottom beam move laterally, ensuring the support continuity between adjacent supports.

[0070] The above description is an exemplary illustration of this utility model and does not constitute a limitation on the technical solution. Any improvements or equivalent substitutions made based on this utility model should fall within the protection scope of this utility model. The descriptions of the above examples each have their own emphasis, and they can be combined and used according to specific circumstances in practical applications.

Claims

1. A telescopic wing-type support for a fully mechanized mining face, characterized in that, Including the top plate and the base; The rear is the side closest to the goaf during operation, the front is the side facing the coal face, the left is the side adjacent to the roadway, and the right is the side adjacent to the hydraulic support. The top plate consists of a fixed top beam in the middle and movable top beams on the left and right sides of the fixed top beam that can move in the left and right directions. The base consists of a fixed base beam in the middle and movable base beams on the left and right sides of the fixed base beam that can move in the left and right directions. And a telescopic, height-adjustable front column and a rear column connecting the top plate and the base; the upper and lower ends of the front column are hinged to the top plate and the base respectively; the upper end of the rear column is hinged to the top plate. Its features are, The front end of the fixed top beam has an extension plate that can be extended and retracted; It has a front baffle, one edge of which is hinged to the front edge of the extension plate; The hinged edge of the front baffle is the first side of the front baffle, and the side opposite to the first side of the front baffle is the second side of the front baffle. The length from the first side of the front baffle to the second side of the front baffle is adjustable. It has a rear baffle; the lower edge of the rear baffle is detachably hinged to the base, and the upper edge of the rear baffle is detachably hinged to the top plate, and at least one of the lower edge and the upper edge of the rear baffle is kept in a hinged state; the width between the lower edge and the upper edge of the rear baffle is adjustable.

2. The telescopic wing-type support for fully mechanized mining faces as described in claim 1, characterized in that, The fixed top beam includes a cover plate, with a left movable beam and a right movable beam on the left and right sides below the cover plate, respectively; a top plate groove is provided between the left movable beam and the right movable beam, and a top plate connecting plate is installed in the top plate groove to connect the left movable beam and the right movable beam.

3. The telescopic wing-type support for fully mechanized mining faces as described in claim 2, characterized in that, The left and right movable beams are hollow structures. The plates on the left and right sides of the extension plate are inserted into the left and right movable beams, and the middle plate is inserted into the top plate groove below the cover plate. The plates on the left and right sides and the middle plate are fixed as a whole at the front edge by a crossbeam. The upper edges of the opposite surfaces at the front ends of the left and right movable beams are provided with recessed extension plate grooves, which cooperate with the left and right side plates of the extension plate to slide.

4. The telescopic wing-type support for fully mechanized mining faces as described in claim 3, characterized in that, Below the extension plate chute is the top plate connecting plate, which is fixed to the left and right movable beams by bolts. An extension plate push-pull rod is installed in the top plate groove, and an extension plate push-pull rod hinge seat is provided on the top plate connecting plate. One end of the extension plate push-pull rod is connected to the extension plate push-pull rod hinge seat, and the other end is connected to the fixed seat provided below the crossbeam.

5. The telescopic wing-type support for fully mechanized mining faces as described in claim 3, characterized in that, The front baffle is composed of a lower plate and an upper plate that are overlapped and nested. The upper plate has guide grooves on both sides, and the lower plate is nested in the guide grooves and slides with them. A front baffle pushing cylinder is provided, one end of which is hinged to the lower plate and the other end is hinged to the front edge of the upper plate. The cylinder drives the upper plate to slide along the guide groove through telescopic movement.

6. The telescopic wing-type support for fully mechanized mining faces as described in claim 5, characterized in that, A connecting short arm is provided on the lower plate near the edge of the extension plate, and a connecting short arm hinge seat is provided on the lower surface of the crossbeam. The connecting short arm is connected to the connecting short arm hinge seat through a pin, so that the front baffle and the extension plate form a linkage structure. It is equipped with a front baffle linkage push-pull rod, one end of which is connected to the lower surface of the extension plate and the other end is connected to the lower plate of the front baffle. The front baffle is opened or closed synchronously with the extension plate. It is equipped with a front baffle hydraulic cylinder. A front baffle cylinder hinge seat is provided on the lower surface of the extension plate, and one end of the front baffle cylinder is mounted on the front baffle cylinder hinge seat. A front baffle tilting hinge is provided at the rear edge of the lower plate, and the other end of the front baffle cylinder is connected to the tilting hinge.

7. The telescopic wing-type support for fully mechanized mining faces as described in claim 2, characterized in that, A rear baffle tilting cylinder hinge seat is provided in the top plate groove. One end of the rear baffle tilting cylinder is connected to the rear baffle tilting cylinder hinge seat, and the other end is hinged to the rear baffle. It is used to install and push the rear baffle to rotate along one of the rear ends of the fixed bottom beam and the fixed top beam.

8. The telescopic wing-type support for fully mechanized mining faces as described in claim 1, characterized in that, The rear baffle is a pull-out structure, including an inner panel and an outer panel. The inner panel is nested in the outer panel and can slide out or retract along its height direction. A rear panel telescopic cylinder is designed between the outer panel and the inner panel. One end of the rear panel telescopic cylinder is connected to the outer panel, and the other end is connected to the lower edge of the inner panel. The telescopic movement drives the inner panel to slide relative to the outer panel.

9. The telescopic wing-type support for fully mechanized mining faces as described in claim 1, characterized in that, It is equipped with a rear auxiliary baffle, the upper end of which is hinged to the movable top beam and the lower end of which is hinged to the movable bottom beam; the height of the rear auxiliary baffle is adjustable.

10. The telescopic wing-type support for fully mechanized mining faces as described in claim 9, characterized in that, The rear auxiliary baffle is a pull-out structure, consisting of an inner piece and an outer piece. The inner piece is nested inside the outer piece and can extend and retract in the vertical direction.

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