Hydraulic support for fully mechanized coal mining face of coal mine

Abstract

The invention relates to the technical field of coal mining equipment, and discloses a coal mine fully mechanized coal mining face hydraulic support which comprises a base, a stand column, a plurality of supporting beams, a shield beam and a side protection plate and further comprises a plurality of guide blocks which are arranged on the tops of the supporting beams in a splayed mode and used for guiding falling clastic sandstone. A plurality of positioning grooves matched with the guide blocks are formed in the top of the supporting beam, in a conventional supporting state, the guide blocks are located in the positioning grooves, and the top planes of the guide blocks coincide with the top plane of the supporting beam; and the lifting assembly is arranged in the supporting beam and comprises a plurality of synchronous plates, the guide blocks are connected with the synchronous plates through connecting blocks, fixing plates are fixedly connected to the surfaces of the synchronous plates, hydraulic rods are hinged to the interior of the supporting beam, and the output ends of the hydraulic rods are hinged to the fixing plates. The device has the advantages that falling rock fragments are guided and collected, and damage caused by falling of the rock fragments is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of coal mining equipment, and more specifically, to a hydraulic support for a fully mechanized coal mining working face. Background Art

[0002] The hydraulic support for comprehensive mining in coal mines is one of the key equipment for the comprehensive mechanized coal mining face in coal mines. It is mainly used to support the roof of the coal mining face to ensure the safety of coal mining operations. The hydraulic system provides power to realize the lifting, supporting and moving operations of the support.

[0003] At present, in order to adapt to the excavation of the fully mechanized mining face, the hydraulic support needs to move synchronously with the continuous coal mining machine to support the working face. The specific operations are: retract the telescopic beam, side guard plate, etc., lower the main support column, and make the main top beam slightly away from the roof, generally 65 to 200 mm, move the support to the specified position by pulling or hydraulic propulsion, and then lift the main support column to make the main top beam in close contact with the roof to ensure that the initial support force is reached.

[0004] However, in the existing frame shifting process, since the main top beam needs to be lowered, the tunnel roof is temporarily without support at this time, and local collapse and subsidence are prone to occur, especially in soft coal seams and coal seams with developed fractures. The roof is composed of multiple layers of different rock types (such as mudstone, sandstone interlayers, etc.) and has poor adhesion. Specifically, when the frame shifting top beam descends, more debris sandstone falls and continues to pile on the surface of the top beam until it accumulates too much and slides from all sides of the top beam, causing damage to the hydraulic support rods and workers below, which is not conducive to the safe production of coal mines. Summary of the invention

[0005] The present invention provides a hydraulic support for a fully mechanized coal mining working face, which solves the technical problems in the above-mentioned background technology.

[0006] The present invention provides a hydraulic support for a fully mechanized coal mining working face, comprising a base, a column, a plurality of support beams, a shield beam and a protective plate, and also comprising:

[0007] A plurality of guide blocks are arranged in an "eight" shape on the top of the support beam to guide the fallen clastic sandstone. A plurality of positioning grooves adapted to the guide blocks are provided on the top of the support beam. In a conventional support state, a plurality of the guide blocks are located in the positioning grooves, and their top planes coincide with the top plane of the support beam.

[0008] A lifting assembly is arranged in the support beam, the lifting assembly includes a plurality of synchronous plates, the guide block is connected to the synchronous plate through a connecting block, a fixed plate is fixedly connected to the surface of the synchronous plate, a hydraulic rod is hinged in the support beam, and an output end of the hydraulic rod is hinged to the fixed plate;

[0009] It also includes a collection component for collecting the fallen debris.

[0010] Preferably, several of the synchronous plates are hinged to the inner wall of the support beam through a rotating shaft, and the rotating shaft is arranged at one end of the synchronous plate away from the hydraulic rod.

[0011] Preferably, the lengths of several of the guiding blocks gradually increase from the rib protection plate towards the shield beam, and the two opposite guiding blocks gradually approach each other from the rib protection plate towards the shield beam.

[0012] Preferably, the collection component includes a collection piece arranged on the surface of the shield beam. The collection piece is open on one side close to the support beam, and the collection piece is connected to the support beam through a traction component.

[0013] Preferably, the traction component includes an auxiliary rod rotatably connected to the inner wall of the support beam. A plurality of wire reels are fixedly connected to the surface of the auxiliary rod, and a pulling rope is wound around the wire reels. One end of the pulling rope away from the wire reel is connected to the collection piece, and the wire reel is connected to the support beam through a torsion spring.

[0014] Preferably, one end of the auxiliary rod penetrates through one side of the support beam and is fixedly connected to a rotating cap, and an internal hexagonal hole is provided on the surface of the rotating cap.

[0015] Preferably, a positioning gear is fixedly connected to the surface of the auxiliary rod. A connecting rod is hinged inside the support beam. One end of the connecting rod is provided with a ratchet tooth adapted to the positioning gear, and the other end of the connecting rod is fixedly connected to an insertion rod. Both ends of the insertion rod are connected to two synchronous plates.

[0016] Preferably, the ratchet tooth is hinged to one end of the connecting rod, and the ratchet tooth is connected to the connecting rod through a spring.

[0017] Preferably, a baffle is hinged to one side of the support beam close to the shield beam. In the normal state, the surface of the baffle is flush with the inner surface of the collection piece.

[0018] Preferably, two stoppers are fixedly connected to the surface of the baffle.

[0019] The beneficial effects of the present invention are as follows:

[0020] By providing several guiding blocks in a "V" shape, specifically, during the process of lowering and moving the support beam, part of the support beam is inclined. At this time, the guiding blocks play a guiding role in the falling trajectory of the caving roof rock, guiding it to a preset area, avoiding accumulation on the top of the support beam and scattering around. In addition, a stepped guiding block with a gradually increasing height in multiple levels is arranged along the falling path, and the kinetic energy of the rock is consumed through continuous collisions, promoting its fragmentation, effectively reducing the damage caused by its falling, and improving the safety and stability to a certain extent during the entire support moving process.

[0021] The present invention provides a collecting piece, which is a pocket-shaped collecting piece with an open side to effectively collect the rock fragments that are guided to roll down. The buffering of the torsion spring offsets the kinetic energy of the rock falling. The collecting piece gradually slides downward due to the increase in weight, which can also increase the rock fragment accumulation path, improve the collection effect, and facilitate subsequent cleaning, thereby improving the overall efficiency of the entire hydraulic support frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the structure of the present invention viewed from above;

[0024] Figure 3 It is a schematic diagram of the internal structure of the support beam of the present invention for showing a normal supporting state;

[0025] Figure 4 The present invention Figure 3 A in the enlarged view;

[0026] Figure 5 It is a schematic diagram of the internal structure of the present invention for showing the support beam shifting frame when it is lowered and tilted;

[0027] Figure 6 It is a schematic diagram of the present invention for showing the connection relationship between the synchronization plate and the guide block;

[0028] Figure 7 is a schematic diagram of the present invention for illustrating a traction assembly;

[0029] Figure 8 It is a schematic diagram of the present invention for separately showing the connection relationship between the traction component and the collection component.

[0030] In the figure: 1. base; 11. column; 12. support beam; 13. shield beam; 14. guard plate; 2. guide block; 21. connecting block; 22. synchronization plate; 221. hydraulic rod; 222. rotating shaft; 223. fixed plate; 3. auxiliary rod; 31. positioning gear; 311. connecting rod; 312. plug rod; 313. ratchet; 314. spring; 32. winding drum; 321. pull rope; 322. torsion spring; 323. rotating cap; 33. collecting piece; 34. baffle; 341. block. DETAILED DESCRIPTION

[0031] Reference will now be made to example embodiments to discuss the subject matter described herein. It should be understood that discussing these embodiments is only to enable those skilled in the art to better understand and thus implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the content of this specification. Each example may omit, substitute, or add various processes or components as needed. In addition, the features described in some examples may also be combined in other examples.

[0032] In one embodiment of the present invention, a hydraulic support for a fully mechanized coal mining face is disclosed. As Figure 1 - Figure 2 shown, it includes a base 1, columns 11, a plurality of support beams 12, a shield beam 13, and a side protection plate 14. Among them, the base 1 is used to support the entire device. The column 11 is a hydraulic multi-section column 11, which is pressurized by hydraulic equipment. At least two columns 11 should be provided. In this application, four columns are provided to provide the supporting force and the inclination effect of the support beam 12. The shield beam 13 is arranged on the side of the support beam 12 close to the goaf, and the side protection plate 14 is hinged on the side of the support beam 12 close to the driving area to assist in supporting the roadway side and is supported by the hydraulic support.

[0033] Specifically, when moving the support, the column 11 is lowered to make the support beam 12 descend and no longer support the roof. Subsequently, the base 1 is moved forward through a traction mechanism or a pushing mechanism. Immediately afterwards, the column 11 is raised to enable the support beam 12 to promptly restore the initial support force on the roof, and the side protection plate 14 is pushed out to support the side.

[0034] It also includes a plurality of guiding blocks 2, which are arranged in a "V" shape on the top of the support beam 12. The guiding blocks 2 should be provided in at least two rows, and the guiding blocks 2 are all arranged to be inclined towards the center position of the support beam 12, showing a "V" shape cross with respect to the opposite guiding blocks 2, but the ends do not cross, and they are only used for guiding rocks and are used to guide the falling clastic sandstone. A plurality of positioning grooves adapted to the guiding blocks 2 are opened on the top of the support beam 12. In the normal support state, a plurality of the guiding blocks 2 are located in the positioning grooves, and their top planes coincide with the top plane of the support beam 12.

[0035] Specifically, since the relative guiding blocks 2 are all inclined towards the position close to the center of the support beam 12, the rock debris falling at the center position of the support beam 12 will be blocked by the guiding blocks 2 and move towards the center direction of the support beam 12 along their inclined positions, so as to achieve the effect of summarizing and centering the falling rock debris. Further, when the support beam 12 is lowered during the operation of moving the support, the support beam 12 can be lowered and inclined, and the specific inclination direction is towards the gob area behind the support, so that the falling rock debris rolls towards the gob area by its own gravity, avoiding the rock debris from falling forward into the tunneling area and mixing into the coal blocks to form impurities. In addition, in the normal state, the guiding blocks 2 will be retracted into the support beam 12 to avoid hindering the support beam 12 from supporting the roof, and the guiding blocks 2 only lift when the support beam 12 is lowered without supporting, each performing its own functions and effectively improving the overall flexibility.

[0036] It should be noted that the guiding blocks 2 arranged in multiple rows can continuously block the rock impurities during the rolling process, and the continuously colliding rock debris will gradually break and crack, forming smaller solid impurities, reducing the damage degree that may be caused by their falling.

[0037] Such as Figure 3 、 Figure 5 and Figure 6 As shown, in this embodiment, it includes a lifting component arranged in the support beam 12. The lifting component includes a number of synchronous plates 22. At least one group of synchronous plates 22 should be provided. In this solution, two groups are provided, respectively located below two rows of guiding blocks 2. The guiding blocks 2 are connected to the synchronous plates 22 through connecting blocks 21. The number of connecting blocks 21 provided is equivalent to the number of guiding blocks 2 and is fixedly connected to the guiding blocks 2. Correspondingly, the connecting blocks 21 can be fixedly connected to the surface of the synchronous plates 22 here. A fixing plate 223 is fixedly connected to the surface of the synchronous plates 22. A hydraulic rod 221 is hinged in the support beam 12. The output end of the hydraulic rod 221 is hinged to the fixing plate 223. It also includes a collecting component for collecting the falling debris.

[0038] Specifically, through the output of the hydraulic rod 221, the fixing plate 223 is pushed to move upward, and correspondingly, the synchronous plates 22 push the guiding blocks 2 to extend out of the top of the support beam 12. At this time, the several guiding blocks 2 move upward synchronously by the same distance and protrude on the top of the support beam 12, facilitating the guiding and blocking of the falling rock impurities.

[0039] In a parallel embodiment, a plurality of the synchronization plates 22 are hinged to the inner wall of the support beam 12 through a rotating shaft 222. The rotating shaft 222 is arranged at one end of the synchronization plate 22 away from the hydraulic rod 221. At this time, one end of the synchronization plate 22 is restricted by the rotating shaft 222 and can only rotate, rather than moving upward synchronously at both ends. When the hydraulic rod 221 outputs and pushes the fixed plate 223 upward, the synchronization plate 22 rotates around the rotating shaft 222, and the end close to the hydraulic rod 221 moves upward, correspondingly pushing a plurality of guiding blocks 2 upward. At this time, the upward-moving synchronization plate 22 is inclined, which will directly make a plurality of guiding blocks 2 protruding from the top of the support beam 12 show a stepped shape of gradually moving upward, as Figure 5 shown in the state. At this time, since a plurality of guiding blocks 2 are placed in a gradually rising state, the gradually rolling rock debris is blocked step by step. The rock continuously collides on the guiding blocks 2 rising step by step, and each collision loses part of its kinetic energy and generates fragmentation. Since some rock fragments have a relatively large particle size when falling, the relatively low front guiding blocks 2 can prevent the larger particle rock fragments from bouncing to a relatively high height, increasing their kinetic energy and the risk of falling. After gradually rolling down, after the larger particle rock fragments are fragmented, they are more easily intercepted and guided by the relatively higher guiding blocks 2 at the rear, improving the applicability of the entire device.

[0040] Furthermore, in this embodiment, the lengths of a plurality of the guiding blocks 2 gradually increase from the rib protection plate 14 to the shield beam 13 direction, and the two opposite guiding blocks 2 gradually approach each other from the rib protection plate 14 to the shield beam 13 direction. On the rolling path of the rock fragments, the distance between the two opposite guiding blocks 2 is gradually narrowed, thereby gradually concentrating the falling rock fragments to the central area of the support beam 12, so as to prevent the rock fragments from scattering and falling from the periphery of the support beam 12 during the support frame moving process, forming a certain safety hazard.

[0041] As Figure 7 and Figure 8 shown, in this embodiment, the collection assembly includes a collection member 33 arranged on the surface of the shield beam 13. The collection member 33 is a net bag with a width equivalent to that of the shield beam 13. One side of the collection member 33 close to the support beam 12 is open. The collection member 33 is connected to the support beam 12 through a traction assembly. Through this net bag-shaped collection member 33, which is arranged below the rolling path of the rock fragments, the rock fragments guided and dropped into the range of the shield beam 13 will be blocked and intercepted by the collection member 33 and continuously collected, reducing the subsequent processing steps of the rock fragments.

[0042] The traction assembly includes an auxiliary rod 3 rotatably connected to the inner wall of the support beam 12. A plurality of wire reels 32 are fixedly connected to the surface of the auxiliary rod 3, and a pull rope 321 is wound around the wire reels 32. One end of the pull rope 321 away from the wire reel 32 is connected to the collection member 33. The pull rope 321 can be connected to the collection member 33 by separable fastening methods such as hanging through a hanging ring and tying a knot. In this way, the collection member 33 can be removed from the pull rope 321, facilitating subsequent processing of the rock fragments in the collection member 33. The wire reel 32 is connected to the support beam 12 through a torsion spring 322.

[0043] Specifically, through the setting of the auxiliary rod 3, the wire reel 32 is fixed on the surface of the auxiliary rod 3, and the pull rope 321 on its surface can be pulled out by rotation. With the torsional force of the torsion spring 322, a certain resistance is given to the pulling out of the pull rope 321 and the rotation of the wire reel 32, so that when the collection member 33 is hit by rock fragments, it can be buffered and offset by the torsional force of the torsion spring 322, improving the durability of the collection member 33. In addition, the weight of the rock fragments gradually increasing in the collection member 33 will also gradually increase the pulling force on the pull rope 321, causing the torsion spring 322 to be continuously twisted and compressed, and the collection member 33 will gradually move down on the cover beam 13, thus facilitating reminding the staff and facilitating the staff to remove the collection member 33.

[0044] It should be noted that one end of the auxiliary rod 3 penetrates through one side of the support beam 12 and is fixedly connected to a rotating cap 323. An internal hexagonal hole is provided on the surface of the rotating cap 323. Through the setting of this internal hexagonal hole on the rotating cap 323, the staff can directly insert a wrench into the rotating cap 323 on one side of the support beam 12 without disassembling the support beam 12, and drive the auxiliary rod 3 to rotate by rotation, synchronously winding and tightening the pull rope 321 by the wire reel 32, and resetting the collection member 33 to a predetermined position. This operation is applicable to the situation where the torsion spring 322 cannot completely return the pull rope 321 to the correct position, facilitating manual reset and improving reliability.

[0045] Further, as Figure 4 shown, in this embodiment, a positioning gear 31 is fixedly connected to the surface of the auxiliary rod 3. A connecting rod 311 is hinged inside the support beam 12. One end of the connecting rod 311 is provided with a ratchet tooth 313 adapted to the positioning gear 31. The other end of the connecting rod 311 is fixedly connected to an insertion rod 312. Both ends of the insertion rod 312 are connected to two synchronous plates 22.

[0046] Specifically, in the normal state, the ratchet 313 is clamped in the tooth groove of the positioning gear 31, preventing the positioning gear 31 from rotating, and thus unable to rotate the wire reel 32 to pull out or wind up the drawstring 321, improving stability. Further, when the hydraulic rod 221 outputs and pushes the synchronous plate 22 to rotate and move upward, and the guiding block 2 protrudes from the top of the support beam 12, the synchronous plate 22 will drive the insertion rod 312 to move upward synchronously. Then, in cooperation with the connecting rod 311 hinged in the support beam 12, the ratchet 313 can be disengaged from the surface of the positioning gear 31. At this time, the positioning gear 31 is no longer blocked and can rotate freely, facilitating the collection member 33 to collect the falling rock fragments.

[0047] Among them, the ratchet 313 is hinged to one end of the connecting rod 311, and the ratchet 313 is connected to the connecting rod 311 through a spring 314. Through the setting of the spring 314, the ratchet 313 can perform one-way winding rotation even when it is stuck on the surface of the positioning gear 31. In this way, when the support beam 12 supports the roof, the auxiliary rod 3 can still be driven to rotate by the rotating cap 323, so as to realize the winding of the drawstring 321 by the wire reel 32.

[0048] A baffle 34 is hinged to one side of the support beam 12 close to the shield beam 13. In the normal state, the surface of the baffle 34 is flush with the inner surface of the collection member 33. The baffle 34 is used to protect the connecting shaft at the joint of the support beam 12 and the shield beam 13, preventing rock fragments from rolling down and causing damage to it. In addition, the rolling rock fragments can also pass through the baffle 34, facilitating entry into the collection member 33.

[0049] Further, two stoppers 341 are fixedly connected to the surface of the baffle 34. The two stoppers 341 are used to further limit the rolling rock fragments, facilitating their rolling into the lower collection member 33 for collection.

[0050] The above describes the embodiments of the present invention. However, these embodiments are not limited to the above specific implementation manners. The above specific implementation manners are merely illustrative and not restrictive. Under the inspiration of this embodiment, those of ordinary skill in the art can also make more equivalent embodiments in various forms, all of which fall within the protection scope of this embodiment.

Claims

1. A hydraulic support for a fully mechanized coal mining face, comprising a base (1), columns (11), a number of support beams (12), a shield beam (13) and a side protection plate (14), characterized in that, It also includes: A number of guiding blocks (2) are arranged in an "eight" shape on the top of the support beam (12) for guiding the falling fragmented sandstone. A number of positioning grooves adapted to the guiding blocks (2) are provided on the top of the support beam (12). In the normal support state, a number of the guiding blocks (2) are located in the positioning grooves, and their top planes coincide with the top plane of the support beam (12); A lifting assembly is arranged in the support beam (12). The lifting assembly includes a number of synchronous plates (22). The guiding blocks (2) are connected to the synchronous plates (22) through connecting blocks (21). A fixed plate (223) is fixedly connected to the surface of the synchronous plates (22). A hydraulic rod (221) is hinged in the support beam (12), and the output end of the hydraulic rod (221) is hinged to the fixed plate (223); It also includes a collection assembly for collecting the fallen debris.

2. The hydraulic support for fully mechanized coal mining face according to claim 1, wherein, A number of the synchronous plates (22) are hinged to the inner wall of the support beam (12) through a rotating shaft (222), and the rotating shaft (222) is arranged at one end of the synchronous plate (22) away from the hydraulic rod (221).

3. The hydraulic support for fully-mechanized coal mining face according to claim 1, wherein The lengths of a number of the guiding blocks (2) gradually increase from the rib protection plate (14) to the shield beam (13), and the relative two guiding blocks (2) gradually approach each other from the rib protection plate (14) to the shield beam (13).

4. A hydraulic support for a fully mechanized coal mining face according to claim 1, characterized in that, The collection assembly includes a collection piece (33) arranged on the surface of the shield beam (13). One side of the collection piece (33) close to the support beam (12) is open, and the collection piece (33) is connected to the support beam (12) through a traction assembly.

5. The hydraulic support for fully mechanized coal mining face according to claim 4, characterized in that The traction assembly includes an auxiliary rod (3) rotatably connected to the inner wall of the support beam (12). A number of wire spools (32) are fixedly connected to the surface of the auxiliary rod (3), and a pull rope (321) is wound around the wire spools (32). One end of the pull rope (321) away from the wire spool (32) is connected to the collection piece (33), and the wire spool (32) is connected to the support beam (12) through a torsion spring (322).

6. The hydraulic support for fully mechanized coal mining face according to claim 5, characterized in that, One end of the auxiliary rod (3) penetrates through one side of the support beam (12) and is fixedly connected to a rotating cap (323), and an internal hexagonal hole is provided on the surface of the rotating cap (323).

7. The hydraulic support for fully mechanized coal mining face according to claim 5, characterized in that, A positioning gear (31) is fixedly connected to the surface of the auxiliary rod (3). A connecting rod (311) is hinged in the support beam (12). One end of the connecting rod (311) is provided with a ratchet tooth (313) adapted to the positioning gear (31), and the other end of the connecting rod (311) is fixedly connected to an insertion rod (312). Both ends of the insertion rod (312) are connected to two synchronous plates (22).

8. A hydraulic support for a fully mechanized coal mining face according to claim 7, characterized in that, The ratchet tooth (313) is hinged to one end of the connecting rod (311), and the ratchet tooth (313) is connected to the connecting rod (311) through a spring (314).

9. The hydraulic support for fully mechanized coal mining face according to claim 1, wherein A baffle (34) is hinged to one side of the support beam (12) close to the shield beam (13). In the normal state, the surface of the baffle (34) is flush with the inner surface of the collection piece (33).

10. The hydraulic support for fully mechanized coal mining face according to claim 9, characterized in that, Two stoppers (341) are fixedly connected to the surface of the baffle (34).

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