阅读说明：本技术 一种液压支架 (Hydraulic support ) 是由 不公告发明人 于 2019-09-24 设计创作，主要内容包括：本发明属于煤矿开采设备技术领域,具体的说是一种液压支架,包括底座、立柱、掩护梁与顶梁；所述顶梁内部设有刮除模块；本发明通过在液压支架的顶梁内设置刮除模块,利用刮除模块中的刮刀对巷道顶板进行刮除与整平,增加了巷道顶板与顶梁顶板的接触面积,大大增强了液压支架的支撑效果,从而有效的提高了矿产作业的安全性；且本发明通过在顶梁上设置有储存腔,在刮刀底部设有刮板,通过刮刀运动带动刮板对顶梁上掉落的土块推动至储存腔内,减少顶梁顶板与巷道顶板之间的杂质,从而增强了顶梁顶板与巷道顶板的接触支撑效果。(The invention belongs to the technical field of coal mining equipment, and particularly relates to a hydraulic support which comprises a base, an upright post, a shield beam and a top beam; a scraping module is arranged inside the top beam; according to the invention, the scraping module is arranged in the top beam of the hydraulic support, and the scraper in the scraping module is used for scraping and leveling the top plate of the roadway, so that the contact area between the top plate of the roadway and the top plate of the top beam is increased, the supporting effect of the hydraulic support is greatly enhanced, and the safety of mineral operation is effectively improved; in addition, the storage cavity is formed in the top beam, the scraper is arranged at the bottom of the scraper, and the scraper is driven by the movement of the scraper to push soil blocks falling from the top beam into the storage cavity, so that impurities between the top beam top plate and the roadway top plate are reduced, and the contact supporting effect of the top beam top plate and the roadway top plate is enhanced.)

1. A hydraulic support comprises a base (1), an upright post (2), a shield beam (3) and a top beam (4), wherein the upright post (2) is positioned at the top end of the base (1), the shield beam (3) is positioned at one side of the base (1), and the top beam (4) is positioned at the top ends of the upright post (2) and the shield beam (3); the method is characterized in that: a scraping module (5) is arranged in the top beam (4), and the scraping module (5) comprises an electric push rod (51), a motor (52), a guide wheel (53) and a guide plate (54); the inner part of the top beam (4) is symmetrically provided with working cavities (6), the bottom ends of the working cavities (6) are provided with electric push rods (51), the top of the electric push rod (51) is connected with a support frame (55), the top of the support frame (55) is provided with a motor (52), the top end of the motor (52) is connected with a rotating shaft, the top of the rotating shaft is connected with a guide wheel (53), a traction rod (56) is arranged on the upper surface of the guide wheel (53), a guide plate (54) is arranged at the top end of the guide wheel (53), the outer end of the guide plate (54) is hinged on the support frame (55), the middle part of the guide plate (54) is provided with a guide groove (541), the draw bar (56) is positioned in the guide groove (541), the inner end of the guide plate (54) is connected with a scraper (7), the top surface of the scraper (7) is flush with the top surfaces of the guide plate (54) and the support frame (55); and a controller is arranged in the working cavity (6) and controls the automatic operation of the hydraulic support.

2. a hydraulic mount according to claim 1 wherein: and a support ring (57) is arranged on the bottom surface of the working cavity (6), and when the bottom end of the support frame (55) is contacted with the top end of the support ring (57), the top surface of the guide plate (54) is flush with the upper surface of the top beam (4).

3. A hydraulic mount according to claim 1 wherein: a group of saw teeth (71) which are uniformly distributed are arranged on two sides of the scraper (7), the cross section of each saw tooth (71) is in the shape of an isosceles triangle, and the angle of the vertex angle of each triangle is smaller than 45 degrees.

4. A hydraulic mount according to claim 3 wherein: the storage cavities (8) are symmetrically arranged on top beams (4) on two sides of the scraper (7), the bottom of the scraper (7) is provided with a scraper (72), and the bottom end of the scraper (72) is provided with an elastic protective layer (73).

5. A hydraulic mount according to claim 3 wherein: the top surface of the saw tooth (71) is flush with the top surface of the scraper (7), the bottom end of the saw tooth (71) is arranged into an oblique angle, and the angle of the oblique angle is less than 30 degrees.

6. A hydraulic mount according to claim 5 wherein: the sawteeth (71) are made of high-carbon high-chromium martensitic stainless steel, and the protective layer (73) is made of butadiene rubber material.

Technical Field

The invention belongs to the technical field of coal mining equipment, and particularly relates to a hydraulic support.

Background

The hydraulic support is a hydraulic power device which utilizes hydraulic pressure to generate supporting force and realizes automatic movement to support and manage a top plate, and is indispensable corollary equipment for comprehensive mechanized mining. The mining face mine pressure acts on the hydraulic support in the form of external load. From the middle of the 90 s of the last century, hydraulic supports in China enter a rapid development stage. At the moment, the fully mechanized mining technology is popularized, the number of the fully mechanized mining working faces in China is greatly improved, meanwhile, the service performance, technical parameters, stability and reliability of the hydraulic support are also obviously improved, and the support is continuously rich in frame types.

But when the geological hardness is great, the clod on the tunnel roof is difficult to get rid of and leads to often appearing unevenness on the tunnel roof, and when the roof of back timber contacted the tunnel roof and supported, unevenness's tunnel roof made the effective supporting area reduction between tunnel roof and the back timber roof, greatly reduced hydraulic support's supporting effect to make mineral production have very big potential safety hazard.

In view of this, the invention provides a hydraulic support, which can effectively increase the contact area between a top beam top plate and a roadway top plate, thereby enhancing the supporting effect of the hydraulic support and improving the safety of mineral operation.

Disclosure of Invention

in order to make up for the defects of the prior art, the invention provides the hydraulic support, which can effectively increase the contact area between the top beam top plate and the roadway top plate, thereby enhancing the supporting effect of the hydraulic support and improving the safety of mineral operation.

The technical scheme adopted by the invention for solving the technical problems is as follows: a hydraulic support comprises a base, an upright post, a shield beam and a top beam, wherein the upright post is positioned at the top end of the base, the shield beam is positioned on one side of the base, and the top beam is positioned at the top ends of the upright post and the shield beam; a scraping module is arranged in the top beam and comprises an electric push rod, a motor, a guide wheel and a guide plate; working cavities are symmetrically arranged in the top beam, electric push rods are mounted at the bottom ends of the working cavities, a support frame is connected to the tops of the electric push rods, a motor is arranged at the top of the support frame, a rotating shaft is connected to the top end of the motor, a guide wheel is connected to the top of the rotating shaft, a traction rod is arranged on the upper surface of the guide wheel, a guide plate is arranged at the top end of the guide wheel, the outer end of the guide plate is hinged to the support frame, a guide groove is formed in the middle of the guide plate, the traction rod is located in the guide groove, a scraper is connected to the inner end of the guide plate; a controller is arranged in the working cavity and controls the automatic operation of the hydraulic support; when the hydraulic support works, when the ground hardness is high, soil blocks on a roadway top plate are difficult to remove, so that the roadway top plate is often uneven, when the top plate of the top beam supports the roadway top plate in a contact manner, the effective supporting area between the roadway top plate and the top beam top plate is reduced by the uneven roadway top plate, and the supporting effect of the hydraulic support is greatly reduced, so that great potential safety hazards exist in mineral production, and the contact area between the top beam top plate and the roadway top plate is effectively increased by the hydraulic support, so that the supporting effect of the hydraulic support is enhanced; when the support is in operation, before the top beam top plate supports the roadway top plate, the controller controls the electric push rod to work, so that the electric push rod pushes the support frame connected with the top part out of the working cavity, when a scraper at the top part of the support frame is in contact with the roadway top plate, the controller controls the motor to work at the moment, the motor drives the connected rotating shaft to rotate when working, the rotating shaft drives the guide wheels connected with the top part to synchronously move when rotating, so that the rotating guide wheels drive the connected traction rod to move in the guide grooves on the guide plates, the side walls of the guide grooves are extruded when the traction rod rotates, so that the external guide plates are driven to rotate when the traction rod rotates, meanwhile, the guide grooves arranged on the guide plates play a role of guiding the movement of the guide plates, and the guide plates positioned at the outer ends of the traction rod swing back and forth by taking a hinge point as, when the guide plate swings back and forth, the scraper on one side is driven to swing synchronously, so that the scraper scrapes off the soil blocks protruding from the top of the roadway; when the scraper scrapes and levels the roadway top plate, the scraper is located at the top of the working cavity, the controller controls the electric push rod to drive the supporting frame at the top to move downwards, so that the guide plate and the scraper at the top of the supporting frame are contained into the working cavity, contact extrusion of the roadway top plate on the guide plate and the scraper is reduced, and damage to the outer portions of the guide plate and the scraper is reduced; the beneficial effects of the invention are as follows: through set up the module of striking off in hydraulic support's back timber, utilize the scraper of striking off in the module to strike off and the flattening to the tunnel roof, increased the area of contact of tunnel roof and back timber roof, strengthened hydraulic support's supporting effect greatly to the effectual security that improves mineral operation.

Preferably, a support ring is arranged on the bottom surface of the working cavity, and when the bottom end of the support frame is contacted with the top end of the support ring, the top surface of the guide plate is flush with the upper surface of the top beam; when the device works, after the scraper scrapes and levels a roadway roof, the electric push rod drives the support frame to recover towards the inside of the working cavity, when the bottom end of the support frame is in contact with the top end of the support ring, the top surface of the guide plate is flush with the upper surface of the top beam, namely the top surfaces of the guide plate, the support frame and the scraper are flush with the upper surface of the top beam, so that the upper surface of the top beam is more level and smooth to be in contact with the roadway roof for supporting, and the phenomenon that the roadway roof is supported unevenly by the top beam due to insufficient or excessive income of the guide plate into the working cavity; simultaneously deflector, support frame and scraper top also can support the tunnel roof of contact, and the support ring that sets up can support the support frame of top contact to the support effect of support frame to top tunnel roof has been strengthened.

Preferably, a group of uniformly distributed saw teeth are arranged on two sides of the scraper, the cross section of each saw tooth is in an isosceles triangle shape, and the angle of the vertex angle of each triangle is smaller than 45 degrees; when the scraper works, the contact area between the scraper and a scraped soil block can be effectively reduced by the sawteeth arranged on the two sides of the scraper, so that the cutting force of the scraper on the soil block is increased, meanwhile, the crushing effect of the soil block can be enhanced by the uniformly arranged sawteeth, the soil block is cut into finer pieces, and the impact on a top beam when the soil block with large volume falls is reduced; and the sawtooth that sets up to isosceles triangle can be even cuts the clod, reduces the local damage that the local atress of sawtooth is too violent to lead to, and the apex angle of this sawtooth is less than 45 for the cutting plane of sawtooth is more sharp-pointed, thereby has strengthened the cutting effect of scraper to the clod.

Preferably, the top beams on two sides of the scraper are symmetrically provided with storage cavities, the bottom of the scraper is provided with a scraper, and the bottom end of the scraper is provided with an elastic protective layer; when the scraper is used for cutting soil blocks of a roadway top plate, the scraped soil blocks are accumulated on the top beam top plate, and when the top beam top plate supports the roadway top plate, the soil blocks falling between the top beam top plate and the top beam top plate reduce the contact area of the top beam top plate to the roadway top plate, so that the supporting effect of the top beam top plate to the roadway top plate is reduced; at the moment, the scraper arranged at the bottom of the scraper pushes and collects the soil blocks falling from the top beam top plate, and the collected soil blocks are intensively pushed into the storage cavities at two sides of the scraper, so that impurities between the top beam top plate and the roadway top plate are reduced, and the contact supporting effect of the top beam top plate and the roadway top plate is enhanced; and the elastic protection layer arranged at the bottom end of the scraper can effectively reduce the direct contact between the scraper and the top beam and reduce the damage of the friction of the scraper, thereby prolonging the service life of the scraper and improving the working stability.

Preferably, the top surface of the sawtooth is flush with the top surface of the scraper, the bottom end of the sawtooth is set to be an oblique angle, and the angle of the oblique angle is smaller than 30 degrees; when the device works, the top surfaces of the sawteeth are flush with the top surface of the scraper, so that the sawteeth can cut off the roadway top plate at the top of the scraper more smoothly, the roadway top plate is more smooth, and the contact and support effects of the top beam top plate and the roadway top plate are further enhanced; and the bottom of sawtooth sets to the bevel angle, and the angle of this bevel angle is less than 30 and makes the cutting plane of sawtooth sharper to the excision effect of scraper to the clod has further been strengthened.

Preferably, the saw teeth are made of high-carbon high-chromium martensitic stainless steel, and the protective layer is made of butadiene rubber material; when the high-carbon high-chromium martensitic stainless steel works, the high-carbon high-chromium martensitic stainless steel has high hardness, high wear resistance and corrosion resistance, so that the sawteeth made of the high-carbon high-chromium martensitic stainless steel can cut the bumps more quickly and effectively, and meanwhile, the service life of the sawteeth in a severe environment is prolonged; and the butadiene rubber material has higher wear resistance, so that the protective layer made of the butadiene rubber material can still keep the working stability when repeatedly rubbing with the top beam, the cleaning effect of the scraper on soil blocks is improved, and the supporting effect of the hydraulic support is further improved.

The invention has the following beneficial effects:

1. According to the invention, the scraping module is arranged in the top beam of the hydraulic support, and the scraper in the scraping module is used for scraping and leveling the top plate of the roadway, so that the contact area between the top plate of the roadway and the top beam is increased, the supporting effect of the hydraulic support is greatly enhanced, and the safety of mineral operation is effectively improved.

2. According to the invention, the storage cavity is arranged on the top beam, the scraper is arranged at the bottom of the scraper, and the scraper is driven by the movement of the scraper to push soil blocks falling from the top beam into the storage cavity, so that impurities between the top beam top plate and the roadway top plate are reduced, and the contact supporting effect of the top beam top plate and the roadway top plate is enhanced.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is an enlarged view at A in FIG. 2;

FIG. 4 is a top view of a doctor blade of the present invention;

FIG. 5 is a cross-sectional view taken at B-B of FIG. 4;

In the figure: the device comprises a base 1, a vertical column 2, a shield beam 3, a top beam 4, a scraping module 5, an electric push rod 51, a motor 52, a guide wheel 53, a guide plate 54, a guide groove 541, a support frame 55, a traction rod 56, a support ring 57, a working cavity 6, a scraper 7, sawteeth 71, a scraper 72, a protective layer 73 and a storage cavity 8.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the following embodiments.

As shown in fig. 1 to 5, the hydraulic support of the present invention includes a base 1, an upright 2, a shield beam 3 and a top beam 4, wherein the upright 2 is located at the top end of the base 1, the shield beam 3 is located at one side of the base 1, and the top beam 4 is located at the top ends of the upright 2 and the shield beam 3; a scraping module 5 is arranged in the top beam 4, and the scraping module 5 comprises an electric push rod 51, a motor 52, a guide wheel 53 and a guide plate 54; the top beam 4 is symmetrically provided with working chambers 6 inside, the bottom ends of the working chambers 6 are provided with electric push rods 51, the tops of the electric push rods 51 are connected with supporting frames 55, the tops of the supporting frames 55 are provided with motors 52, the top ends of the motors 52 are connected with rotating shafts, the tops of the rotating shafts are connected with guide wheels 53, the upper surfaces of the guide wheels 53 are provided with traction rods 56, the top ends of the guide wheels 53 are provided with guide plates 54, the outer ends of the guide plates 54 are hinged on the supporting frames 55, the middle parts of the guide plates 54 are provided with guide grooves 541, the traction rods 56 are positioned inside the guide grooves 541, the inner ends of the guide plates 54 are connected with scrapers 7, and the top surfaces; a controller is arranged in the working cavity 6 and controls the automatic operation of the hydraulic support; when the hydraulic support works, when the ground hardness is high, soil blocks on a roadway top plate are difficult to remove, so that the roadway top plate is often uneven, when the top plate of the top beam 4 supports the roadway top plate in a contact manner, the effective supporting area between the roadway top plate and the top plate of the top beam 4 is reduced by the uneven roadway top plate, and the supporting effect of the hydraulic support is greatly reduced, so that great potential safety hazards exist in mineral production, and the contact area between the top plate of the top beam 4 and the roadway top plate is effectively increased by the hydraulic support, so that the supporting effect of the hydraulic support is enhanced; when the controller controls the electric push rod 51 to work before the top beam 4 supports the roadway roof, so that the electric push rod 51 pushes the support frame 55 connected with the top part out of the working cavity 6, when the scraper 7 at the top part of the support frame 55 contacts with the roadway roof, the controller controls the motor 52 to work, the motor 52 drives the connected rotating shaft to rotate when working, the rotating shaft drives the guide wheel 53 connected with the top part to synchronously move when rotating, so that the rotating guide wheel 53 drives the connected traction rod 56 to move in the guide groove 541 on the guide plate 54, the side wall of the guide groove 541 is extruded when the traction rod 56 rotates, so that the outer guide plate 54 is driven to rotate when the traction rod 56 rotates, meanwhile, the guide groove 541 arranged on the guide plate 54 plays a role of guiding the movement of the guide plate 54, and the guide plate 54 positioned at the outer end of the traction rod 56 swings back and forth by taking a hinge point as a center, when the guide plate 54 swings back and forth, the scraper 7 on one side is driven to swing synchronously, so that the scraper 7 scrapes off the soil blocks protruding from the top of the roadway; when the scraper 7 scrapes and levels the roadway top plate, the scraper 7 is located at the top of the working chamber 6, the controller controls the electric push rod 51 to drive the supporting frame 55 at the top to move downwards, so that the guide plate 54 and the scraper 7 at the top of the supporting frame 55 are contained in the working chamber 6, contact extrusion of the roadway top plate on the guide plate 54 and the scraper 7 is reduced, and damage to the guide plate 54 and the outer part of the scraper 7 is reduced; the beneficial effects of the invention are as follows: scraping module 5 is set up through the back timber 4 at hydraulic support, utilizes scraping scraper 7 in the module 5 to strike off and the flattening to the tunnel roof, has increased the area of contact of tunnel roof and back timber 4 roof, has strengthened hydraulic support's supporting effect greatly to the effectual security that improves the mineral operation.

As an embodiment of the present invention, a support ring 57 is disposed on the bottom surface of the working chamber 6, and when the bottom end of the support frame 55 contacts the top end of the support ring 57, the top surface of the guide plate 54 is flush with the upper surface of the top beam 4; when the device works, after the scraper 7 scrapes and levels the roadway roof, the electric push rod 51 drives the support frame 55 to recover towards the inside of the working cavity 6, when the bottom end of the support frame 55 is contacted with the top end of the support ring 57, the top surface of the guide plate 54 is flush with the upper surface of the top beam 4, namely the guide plate 54, the support frame 55 and the top surface of the scraper 7 are flush with the upper surface of the top beam 4, so that the upper surface of the top beam 4 is more smoothly contacted and supported with the roadway roof, and the phenomenon that the roadway roof is supported by the top beam 4 unevenly due to insufficient or excessive income of the guide plate 54 into the working cavity 6 is reduced, so that the; simultaneously deflector 54, support frame 55 and scraper 7 top also can support the tunnel roof of contact, and the support ring 57 that sets up can support the support frame 55 of top contact to the support effect of support frame 55 to top tunnel roof has been strengthened.

As an embodiment of the invention, a group of saw teeth 71 which are uniformly distributed are arranged on two sides of the scraper 7, the cross section of each saw tooth 71 is shaped as an isosceles triangle, and the vertex angle of the isosceles triangle is less than 45 degrees; during working, the contact area between the scraper 7 and a scraped soil block can be effectively reduced by the sawteeth 71 arranged on the two sides of the scraper 7, so that the cutting force of the scraper 7 on the soil block is increased, meanwhile, the crushing effect of the soil block can be enhanced by the uniformly arranged sawteeth 71, the soil block is cut into finer pieces, and the impact on the top beam 4 when the soil block with large volume drops is reduced; and the sawtooth 71 that sets up to isosceles triangle can be even cuts the clod, reduces the local damage that the local too violent leaded to of atress of sawtooth 71, and the apex angle of this sawtooth 71 is less than 45 for the cutting plane of sawtooth 71 is more sharp-pointed, thereby has strengthened the cutting effect of scraper 7 to the clod.

As an embodiment of the invention, storage cavities 8 are symmetrically arranged on the top beam 4 at both sides of the scraper 7, a scraper 72 is arranged at the bottom of the scraper 7, and a layer of elastic protective layer 73 is arranged at the bottom end of the scraper 72; when the scraper 7 is used for cutting the soil blocks on the top plate of the roadway, the scraped soil blocks are accumulated on the top plate of the top beam 4, and when the top plate of the top beam 4 supports the top plate of the roadway, the soil blocks falling between the top plate and the top plate of the roadway reduce the contact area of the top plate of the top beam 4 on the top plate of the roadway, so that the supporting effect of the top plate of the top beam 4 on the top plate of the roadway is reduced; at the moment, the scraper 72 arranged at the bottom of the scraper 7 pushes and collects the soil blocks falling from the top plate of the top beam 4, and the collected soil blocks are intensively pushed into the storage cavities 8 at two sides of the scraper 7, so that impurities between the top plate of the top beam 4 and the top plate of the roadway are reduced, and the contact supporting effect of the top plate of the top beam 4 and the top plate of the roadway is enhanced; and the elastic protection layer 73 arranged at the bottom end of the scraper 72 can effectively reduce the direct contact between the scraper 72 and the top beam 4 and reduce the friction damage of the scraper 72, thereby prolonging the service life of the scraper 72 and improving the working stability.

As an embodiment of the present invention, the top surface of the sawtooth 71 is flush with the top surface of the scraper 7, the bottom end of the sawtooth 71 is set to be an oblique angle, and the angle of the oblique angle is less than 30 °; when the device works, the top surfaces of the saw teeth 71 are flush with the top surface of the scraper 7, so that the saw teeth 71 can cut off the top plate of the roadway at the top of the scraper 7 more smoothly, the top plate of the roadway is more smooth, and the contact and support effects of the top plate of the top beam 4 and the top plate of the roadway are further enhanced; and the bottom end of the saw tooth 71 is arranged to be an oblique angle, and the angle of the oblique angle is less than 30 degrees, so that the cutting surface of the saw tooth 71 is sharper, and the cutting effect of the scraper 7 on the soil block is further enhanced.

as an embodiment of the present invention, the saw teeth 71 are made of high carbon and high chromium martensitic stainless steel, and the protective layer 73 is made of butadiene rubber material; when the high-carbon high-chromium martensitic stainless steel works, the high-carbon high-chromium martensitic stainless steel has high hardness, high wear resistance and corrosion resistance, so that the sawteeth 71 made of the high-carbon high-chromium martensitic stainless steel can cut the bumps more quickly and effectively, and meanwhile, the service life of the sawteeth 71 in a severe environment is prolonged; and the butadiene rubber material has higher wear resistance, so that the protective layer 73 made of the butadiene rubber material can still keep the working stability when repeatedly rubbing with the top beam 4, the cleaning effect of the scraper 72 on soil blocks is improved, and the supporting effect of the hydraulic support is further improved.

When the device works, the controller controls the electric push rod 51 to work, so that the electric push rod 51 pushes the support frame 55 connected with the top part out of the working cavity 6, when the scraper 7 at the top part of the support frame 55 is in contact with a roadway top plate, the controller controls the motor 52 to work at the moment, the motor 52 drives the rotating shaft connected with the top part to rotate when working, the rotating shaft drives the guide wheel 53 connected with the top part to synchronously move when rotating, so that the rotating guide wheel 53 drives the connecting pull rod 56 to move in the guide groove 541 on the guide plate 54, the side wall of the guide groove 541 is extruded when the pull rod 56 rotates, so that the outer guide plate 54 is driven to rotate when the pull rod 56 rotates, meanwhile, the guide groove 541 arranged on the guide plate 54 plays a role of guiding the movement of the guide plate 54, and the guide plate 54 positioned at the outer end of the pull rod 56 swings back and forth by taking a hinge point as a, when the guide plate 54 swings back and forth, the scraper 7 on one side is driven to swing synchronously, so that the scraper 7 scrapes off the soil blocks protruding from the top of the roadway; when the scraper 7 scrapes and levels the roadway top plate, the scraper 7 is located at the top of the working chamber 6, the controller controls the electric push rod 51 to drive the supporting frame 55 at the top to move downwards, so that the guide plate 54 and the scraper 7 at the top of the supporting frame 55 are contained in the working chamber 6, contact extrusion of the roadway top plate on the guide plate 54 and the scraper 7 is reduced, and damage to the guide plate 54 and the outer part of the scraper 7 is reduced; the beneficial effects of the invention are as follows: scraping module 5 is set up through the back timber 4 at hydraulic support, utilizes scraping scraper 7 in the module 5 to strike off and the flattening to the tunnel roof, has increased the area of contact of tunnel roof and back timber 4 roof, has strengthened hydraulic support's supporting effect greatly to the effectual security that improves the mineral operation.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.