Coal mine working face support

Abstract

The utility model discloses a coal mine working face support which comprises a hydraulic support base, the top of the hydraulic support base is horizontally connected with a transverse top plate through a hydraulic cylinder, the transverse top plate is arranged right above the hydraulic support base correspondingly, and one side of the top of the hydraulic support base is provided with an inclined top plate through a connecting rod. A first driving rotating disc, a driven rotating disc and a second driving rotating disc which are driven by a synchronous motor are arranged above a hydraulic support base, and a first crushing hydraulic cylinder and a second crushing hydraulic cylinder are rotationally installed on rotating shafts arranged in the middle of the driving rotating disc. When the motor is started, the first crushing hydraulic cylinder and the second crushing hydraulic cylinder can alternately and upwards jack and beat a coal seam at a high position so as to crush the coal seam, and since beating and crushing of the coal seam at the high position are automatically completed by the equipment, potential safety hazards cannot be caused to personnel, and harm caused by excessive coal caving can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mining support, in particular to a coal mine working face support. Background Art

[0002] In the process of modern coal mining, if a thick coal seam is encountered, most of them will adopt the top coal caving process for mining. The top coal caving mining method is to arrange a long wall working face with a mining height of 2-3 meters along the coal seam or the bottom in the thick coal seam, and use a comprehensive mechanized coal mining process to recover the top coal above the support by using the effect of mine pressure or by artificial loosening to break it into loose bodies and then release it from the rear of the support and recycle it. A Chinese patent (publication number: CN102352762A) discloses a low-position top coal caving hydraulic support, also known as a two-stage telescopic plug-in type top coal caving hydraulic support, which is composed of a top beam, a column, a base, a shield beam 2, a four-bar mechanism, and a coal caving mechanism composed of a tail beam and a plug-in plate. Its coal caving mechanism is a two-stage telescopic plug-in type coal caving mechanism, which is composed of a tail beam, a first-level plug-in plate, a second-level plug-in plate, and a double telescopic jack. The first-stage plug plate is embedded on the slideway in the tail beam body, the second-stage plug plate is embedded on the slideway in the first-stage plug plate, and the double telescopic jack is hinged between the tail beam and the second-stage plug plate. The double telescopic jack can be controlled to push the two-stage plug plates to extend and close or open the coal discharge port.

[0003] However, the hydraulic supports used in the existing top coal caving process have some disadvantages when used, such as:

[0004] The hydraulic supports used in the existing top coal caving process can complete daily coal mining work well. However, if the coal is excessively caving during use, the crushed coal seam on the top of the support will be completely released, while the higher coal seams or gangue cannot fall because they are not crushed or because they are too large to squeeze each other. At this time, there is coal seam pressure at one end of the top of the hydraulic support, while there is no coal seam pressure at the other end, resulting in uneven force on the support and causing it to tilt or tip over. Even if the support does not tip over, when the coal seam on the top that has not fallen suddenly falls, due to the lack of buffering of the crushed coal seam, the suddenly falling coal seam will hit the hydraulic support hard under the acceleration of gravity, thereby causing damage to the support. Therefore, a device that can crush the top coal seam in time and is set with the hydraulic support is needed. Utility Model Content

[0005] The utility model aims to provide a support for a coal mine working face to solve the problem that "the hydraulic support used in the existing top coal caving process can well complete daily coal mining work, but if the coal is excessively caved during use, the coal seam that has been crushed on the top of the support will be completely released, while the higher coal seam or gangue cannot fall down due to not being crushed or squeezing each other due to being too large. At this time, there is coal seam pressure at one end of the top of the hydraulic support, while there is no coal seam pressure at the other end, resulting in uneven force on the support and causing skewness or tipping. Even if the support does not tip over, when the coal seam that has not fallen on the top suddenly falls, due to the lack of buffering of the broken coal seam, the suddenly falling coal seam will hit the hydraulic support hard under the acceleration of gravity, thereby causing damage to the support. Therefore, a device that can crush the top coal seam in time and is set with the hydraulic support is needed."

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a coal mine working face support, comprising: a hydraulic support base, the top of the hydraulic support base is horizontally connected to a transverse top plate through a hydraulic cylinder, the transverse top plate is arranged corresponding to the top of the hydraulic support base, an inclined top plate is installed on one side of the top of the hydraulic support base through a connecting rod, the transverse top plate and the inclined top plate are rotatably connected by pins, synchronous motors are fixedly installed on the inner walls on both sides of the gap above the hydraulic support base, one of the synchronous motor power output ends is fixedly welded with a first driving turntable, and the other synchronous motor power output end is fixedly welded with a second driving turntable, a driven turntable is arranged between the first driving turntable and the second driving turntable, and the The first driving turntable, the driven turntable and the second driving turntable are of the same size and are arranged equidistantly from each other. A rotating shaft is fixedly welded at one edge between the first driving turntable and the driven turntable, and a rotating shaft is also fixedly welded at another edge between the driven turntable and the second driving turntable. A first crushing hydraulic cylinder is rotatably mounted on the rotating shaft arranged between the first driving turntable and the driven turntable, and a power output end of the first crushing hydraulic cylinder passes through the inclined top plate. A second crushing hydraulic cylinder is rotatably mounted on the rotating shaft arranged between the driven turntable and the second driving turntable, and a power output end of the second crushing hydraulic cylinder passes through the horizontal top plate.

[0007] Furthermore, the rotating shaft between the first driving turntable and the driven turntable is arranged at the edge of one side of the driven turntable, and the rotating shaft between the driven turntable and the second driving turntable is arranged at the edge of the other side of the driven turntable, the two rotating shafts are respectively arranged on the two side surfaces of the driven turntable, and the two rotating shafts are respectively symmetrically arranged on the edges of the driven turntable in two opposite directions.

[0008] Furthermore, it also includes: a first breaker hammer and a second breaker hammer, the first breaker hammer and the second breaker hammer are both in the shape of a teardrop, the first breaker hammer is fixedly welded to the power output end of the first breaker hydraulic cylinder, and the second breaker hammer is fixedly welded to the power output end of the second breaker hydraulic cylinder.

[0009] Furthermore, it also includes: a first one-way valve plate and a second one-way valve plate, the first one-way valve plate is arranged on the inclined top plate, the first one-way valve plate is arranged corresponding to the first crushing hydraulic cylinder, the first one-way valve plate is used to close the hole of the first crushing hydraulic cylinder penetrating the inclined top plate, the second one-way valve plate is arranged on the transverse top plate, the second one-way valve plate is arranged corresponding to the second crushing hydraulic cylinder, the second one-way valve plate is used to close the hole of the second crushing hydraulic cylinder penetrating the transverse top plate, and the first one-way valve plate and the second one-way valve plate are both used to prevent broken coal blocks from falling.

[0010] Furthermore, it also includes: a first limit ring and a second limit ring, the first limit ring is fixedly connected to the lower surface of the inclined top plate, the first limit ring is arranged corresponding to the first one-way valve plate, the power output end of the first crushing hydraulic cylinder passes through the first limit ring, and the first limit ring is used to provide a swing fulcrum for the first crushing hydraulic cylinder, the second limit ring is fixedly connected to the lower surface of the horizontal top plate, the second limit ring is arranged corresponding to the second one-way valve plate, the power output end of the second crushing hydraulic cylinder passes through the second limit ring, and the second limit ring is used to provide a swing fulcrum for the second crushing hydraulic cylinder.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model arranges a first driving turntable, a driven turntable and a second driving turntable driven by a synchronous motor above the hydraulic support base, and rotatably installs a first crushing hydraulic cylinder and a second crushing hydraulic cylinder on a rotating shaft arranged in the middle thereof, so that when the motor is started, the first crushing hydraulic cylinder and the second crushing hydraulic cylinder can alternately lift up and knock the high coal seam to crush it. Since the knocking and crushing of the high coal seam is completed by the equipment itself, it will not cause safety hazards to personnel and can effectively reduce the harm caused by excessive coal placement. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of a three-dimensional structure of a product in an embodiment of the utility model, viewed from the left side;

[0014] Figure 2 for Figure 1 A schematic diagram of a three-dimensional structure of the product in the embodiment, viewed from the top on the right side;

[0015] Figure 3 for Figure 1 A schematic diagram of the three-dimensional structure of the product in the embodiment when viewed from the bottom on the left side;

[0016] Figure 4 for Figure 1 A schematic diagram of a three-dimensional structure of the product in the embodiment when viewed from the bottom on the right side;

[0017] Figure 5 for Figure 1 A schematic diagram of the main structure of the product in the embodiment;

[0018] Figure 6 for Figure 5 AA section structure schematic diagram in;

[0019] Figure 7 for Figure 1 A schematic diagram of the product side structure in the embodiment;

[0020] Figure 8 for Figure 7 Schematic diagram of the BB cross-section structure;

[0021] Fig. 9 for Figure 1 Schematic diagram of the partial three-dimensional structure of the crushing mechanism in the embodiment.

[0022] Figure numerals: 101, hydraulic support base; 102, horizontal top plate; 103, inclined top plate; 201, synchronous motor; 202, first driving turntable; 203, driven turntable; 204, second driving turntable; 205, first crushing hydraulic cylinder; 206, second crushing hydraulic cylinder; 301, first crushing hammer; 302, second crushing hammer; 401, first limiting ring; 402, second limiting ring; 501, first one-way valve plate; 502, second one-way valve plate. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Please also read Figure 1-Figure 9 ,in, Figure 1 This is a schematic diagram of a three-dimensional structure of a product in an embodiment of the utility model, viewed from the left side; Figure 2 for Figure 1 A schematic diagram of a three-dimensional structure of the product in the embodiment, viewed from the top on the right side;

[0025] Figure 3 for Figure 1A schematic diagram of the three-dimensional structure of the product in the embodiment when viewed from the bottom on the left side; Figure 4 for Figure 1 A schematic diagram of a three-dimensional structure of the product in the embodiment when viewed from the bottom on the right side; Figure 5 for Figure 1 A schematic diagram of the main structure of the product in the embodiment;

[0026] Figure 6 for Figure 5 AA section structure schematic diagram in; Figure 7 for Figure 1 A schematic diagram of the product side structure in the embodiment; Figure 8 for Figure 7 Schematic diagram of the BB cross-section structure; Fig. 9 for Figure 1 Schematic diagram of the partial three-dimensional structure of the crushing mechanism in the embodiment.

[0027] A coal mine working face support, comprising: a hydraulic support base 101, the top of the hydraulic support base 101 is horizontally connected to a transverse top plate 102 through a hydraulic cylinder, the transverse top plate 102 is arranged corresponding to the top of the hydraulic support base 101, an inclined top plate 103 is installed on one side of the top of the hydraulic support base 101 through a connecting rod, the transverse top plate 102 and the inclined top plate 103 are rotatably connected through pins, synchronous motors 201 are fixedly installed on the inner walls on both sides of the gap above the hydraulic support base 101, one of the synchronous motors 201 power output end is fixedly welded with a first driving turntable 202, and the other synchronous motor 201 power output end is fixedly welded with a second driving turntable 204, a driven turntable 203 is arranged between the first driving turntable 202 and the second driving turntable 204, the first driving turntable 202, the driven turntable 203 The turntable 203 and the second driving turntable 204 have the same size, and the first driving turntable 202, the driven turntable 203 and the second driving turntable 204 are arranged equidistantly, a rotating shaft is fixedly welded at one edge between the first driving turntable 202 and the driven turntable 203, and a rotating shaft is also fixedly welded at the other edge between the driven turntable 203 and the second driving turntable 204; a first crushing hydraulic cylinder 205 is rotatably mounted on the rotating shaft arranged between the first driving turntable 202 and the driven turntable 203, and the power output end of the first crushing hydraulic cylinder 205 is arranged through the inclined top plate 103, and a second crushing hydraulic cylinder 206 is rotatably mounted on the rotating shaft arranged between the driven turntable 203 and the second driving turntable 204, and the power output end of the second crushing hydraulic cylinder 206 is arranged through the horizontal top plate 102;

[0028] The synchronous motor 201 is a DC motor, and the rotation directions of the two motors are adjusted to opposite directions during installation. When the motors are started, the two synchronous motors 201 are started at the same time. Since the two synchronous motors 201 are installed opposite to each other, the three turntables can be driven in the same direction when the two motors rotate in opposite directions. The purpose of using two motors is to increase the torque when the turntable rotates, so that the lifting action of the two crushing hydraulic cylinders is more powerful.

[0029] Among them, since the width of the coal seam that can be reached by a single crushing hydraulic cylinder is limited, when implementing this scheme, several more sets of crushing hydraulic cylinders can be added according to actual conditions, so as to crush coal seams in more areas;

[0030] When in use, first start the two synchronous motors 201, which will drive the first driving turntable 202, the driven turntable 203 and the second driving turntable 204 to rotate simultaneously. Due to the rotation of the three turntables, the first crushing hydraulic cylinder 205 and the second crushing hydraulic cylinder 206 installed on the shaft are lifted up, and the two crushing hydraulic cylinders will swing due to the limitation of the two limiting rings during the rotation of the turntables. Then, slowly start the first crushing hydraulic cylinder 205 and the second crushing hydraulic cylinder 206, so that the power output ends of the two crushing hydraulic cylinders are slowly extended until the power output ends of the two crushing hydraulic cylinders can touch the top coal seam, thereby achieving the percussion crushing of the top coal seam.

[0031] The utility model arranges a first driving turntable 202, a driven turntable 203 and a second driving turntable 204 driven by a synchronous motor 201 above a hydraulic support base 101, and rotatably installs a first crushing hydraulic cylinder 205 and a second crushing hydraulic cylinder 206 on a rotating shaft arranged in the middle thereof, so that when the motor is started, the first crushing hydraulic cylinder 205 and the second crushing hydraulic cylinder 206 can alternately lift up and knock the high coal seam, thereby crushing it. Since the knocking and crushing of the high coal seam is completed by the equipment itself, it will not cause safety hazards to personnel, and can effectively reduce the harm caused by excessive coal placement.

[0032] Furthermore, the rotating shaft between the first driving turntable 202 and the driven turntable 203 is arranged at the edge of one side of the driven turntable 203, and the rotating shaft between the driven turntable 203 and the second driving turntable 204 is arranged at the edge of the other side of the driven turntable 203. The two rotating shafts are respectively arranged on the two side surfaces of the driven turntable 203, and the two rotating shafts are respectively symmetrically arranged on the edges of the driven turntable 203 in two opposite directions.

[0033] Furthermore, it also includes: a first breaker hammer 301 and a second breaker hammer 302, the first breaker hammer 301 and the second breaker hammer 302 are both in the shape of a teardrop, the first breaker hammer 301 is fixedly welded to the power output end of the first crushing hydraulic cylinder 205, and the second breaker hammer 302 is fixedly welded to the power output end of the second crushing hydraulic cylinder 206;

[0034] Among them, the setting of the first breaker 301 and the second breaker hammer 302 can increase the impact force on the coal seam and improve the crushing effect on the coal seam. In addition, setting the first breaker hammer 301 and the second breaker hammer 302 into a water drop shape is conducive to retracting the first breaker hammer 301 and the second breaker hammer 302 from the first one-way valve plate 501 and the second one-way valve plate 502.

[0035] Furthermore, it also includes: a first one-way valve plate 501 and a second one-way valve plate 502, wherein the first one-way valve plate 501 is arranged on the inclined top plate 103, the first one-way valve plate 501 is arranged corresponding to the first crushing hydraulic cylinder 205, and the first one-way valve plate 501 is used to close the hole of the first crushing hydraulic cylinder 205 penetrating the inclined top plate 103, the second one-way valve plate 502 is arranged on the transverse top plate 102, the second one-way valve plate 502 is arranged corresponding to the second crushing hydraulic cylinder 206, and the second one-way valve plate 502 is used to close the hole of the second crushing hydraulic cylinder 206 penetrating the transverse top plate 102, and the first one-way valve plate 501 and the second one-way valve plate 502 are both used to prevent the broken coal blocks from falling;

[0036] Among them, the first one-way valve plate 501 and the second one-way valve plate 502 are set to a state that they can only be opened upward but not downward. The purpose of this setting is to allow the power output ends of the first crushing hydraulic cylinder 205 and the second crushing hydraulic cylinder 206 to extend out of the hydraulic support for crushing, while preventing the coal blocks on the top of the hydraulic support from falling from the hole. The first one-way valve plate 501 and the second one-way valve plate 502 are set at the closed middle part to facilitate the retraction of the first breaker 301 and the second breaker 302, thereby facilitating the retraction of the first breaker 301 and the second breaker 302.

[0037] Furthermore, it also includes: a first limit ring 401 and a second limit ring 402, the first limit ring 401 is fixedly connected to the lower surface of the inclined top plate 103, the first limit ring 401 is arranged corresponding to the first one-way valve plate 501, the power output end of the first crushing hydraulic cylinder 205 is arranged through the first limit ring 401, the first limit ring 401 is used to provide a swing fulcrum for the first crushing hydraulic cylinder 205, the second limit ring 402 is fixedly connected to the lower surface of the horizontal top plate 102, the second limit ring 402 is arranged corresponding to the second one-way valve plate 502, the power output end of the second crushing hydraulic cylinder 206 is arranged through the second limit ring 402, and the second limit ring 402 is used to provide a swing fulcrum for the second crushing hydraulic cylinder 206.

[0038] In summary, the utility model provides a coal mine working face support. When working, first start the two synchronous motors 201. The synchronous motors 201 will drive the first driving turntable 202, the driven turntable 203 and the second driving turntable 204 to rotate simultaneously. Due to the rotation of the three turntables, the first crushing hydraulic cylinder 205 and the second crushing hydraulic cylinder 206 installed on the rotating shaft are lifted up, and the two crushing hydraulic cylinders will swing due to the limitation of the two limiting rings during the rotation of the turntables. Then, slowly start the first crushing hydraulic cylinder 205 and the second crushing hydraulic cylinder 206, so that the power output ends of the two crushing hydraulic cylinders are slowly extended until the power output ends of the two crushing hydraulic cylinders can touch the top coal seam, so as to achieve the percussion crushing of the top coal seam.

[0039] The utility model arranges a first driving turntable 202, a driven turntable 203 and a second driving turntable 204 driven by a synchronous motor 201 above a hydraulic support base 101, and rotatably installs a first crushing hydraulic cylinder 205 and a second crushing hydraulic cylinder 206 on a rotating shaft arranged in the middle thereof, so that when the motor is started, the first crushing hydraulic cylinder 205 and the second crushing hydraulic cylinder 206 can alternately lift up and knock the high coal seam, thereby crushing it. Since the knocking and crushing of the high coal seam is completed by the equipment itself, it will not cause safety hazards to personnel, and can effectively reduce the harm caused by excessive coal placement.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coal mine working face support, comprising: A hydraulic support base (101), wherein the top of the hydraulic support base (101) is horizontally connected to a transverse top plate (102) through a hydraulic cylinder, the transverse top plate (102) is arranged corresponding to the top of the hydraulic support base (101), an inclined top plate (103) is installed on one side of the top of the hydraulic support base (101) through a connecting rod, and the transverse top plate (102) and the inclined top plate (103) are rotatably connected through a pin, and it is characterized in that synchronous motors (201) are fixedly installed on the inner walls on both sides of the gap above the hydraulic support base (101), one of the synchronous motors (201) is fixedly welded with a first driving turntable (202) at the power output end, and the other synchronous motor (201) is fixedly welded with a second driving turntable (204) at the power output end, and a driven turntable (203) is arranged between the first driving turntable (202) and the second driving turntable (204), and the first driving turntable (202) and the driven turntable (204) are connected to each other. The first driving turntable (202), the driven turntable (203) and the second driving turntable (204) are of the same size, and the first driving turntable (202), the driven turntable (203) and the second driving turntable (204) are arranged equidistantly, a rotating shaft is fixedly welded at one edge between the first driving turntable (202) and the driven turntable (203), and a rotating shaft is also fixedly welded at the other edge between the driven turntable (203) and the second driving turntable (204); a first crushing hydraulic cylinder (205) is rotatably mounted on the rotating shaft arranged between the first driving turntable (202) and the driven turntable (203), and a power output end of the first crushing hydraulic cylinder (205) is arranged through the inclined top plate (103), and a second crushing hydraulic cylinder (206) is rotatably mounted on the rotating shaft arranged between the driven turntable (203) and the second driving turntable (204), and a power output end of the second crushing hydraulic cylinder (206) is arranged through the transverse top plate (102).

2. A coal mine working face support according to claim 1, characterized in that: The rotating shaft between the first driving rotating disk (202) and the driven rotating disk (203) is arranged at the edge of one side of the driven rotating disk (203), and the rotating shaft between the driven rotating disk (203) and the second driving rotating disk (204) is arranged at the edge of the other side of the driven rotating disk (203). The two rotating shafts are respectively arranged on the two side surfaces of the driven rotating disk (203), and the two rotating shafts are respectively symmetrically arranged on the edges of the driven rotating disk (203) in two opposite directions.

3. A coal mine working face support according to claim 1, characterized in that: Also includes: A first breaker hammer (301) and a second breaker hammer (302), wherein the first breaker hammer (301) and the second breaker hammer (302) are both in the shape of a teardrop, the first breaker hammer (301) is fixedly welded to the power output end of the first breaker hydraulic cylinder (205), and the second breaker hammer (302) is fixedly welded to the power output end of the second breaker hydraulic cylinder (206).

4. A coal mine working face support according to claim 1, characterized in that: Also includes: A first one-way valve plate (501) and a second one-way valve plate (502), wherein the first one-way valve plate (501) is arranged on the inclined top plate (103), the first one-way valve plate (501) is arranged corresponding to the first crushing hydraulic cylinder (205), and the first one-way valve plate (501) is used to close the hole of the first crushing hydraulic cylinder (205) penetrating the inclined top plate (103); the second one-way valve plate (502) is arranged on the transverse top plate (102), the second one-way valve plate (502) is arranged corresponding to the second crushing hydraulic cylinder (206), and the second one-way valve plate (502) is used to close the hole of the second crushing hydraulic cylinder (206) penetrating the transverse top plate (102); the first one-way valve plate (501) and the second one-way valve plate (502) are both used to prevent the broken coal from falling.

5. A coal mine working face support according to claim 4, characterized in that: Also includes: A first limiting ring (401) and a second limiting ring (402), wherein the first limiting ring (401) is fixedly connected to the lower surface of the inclined top plate (103), the first limiting ring (401) is arranged corresponding to the first one-way valve plate (501), the power output end of the first crushing hydraulic cylinder (205) is arranged through the first limiting ring (401), and the first limiting ring (401) is used to provide a swing fulcrum for the first crushing hydraulic cylinder (205), the second limiting ring (402) is fixedly connected to the lower surface of the horizontal top plate (102), the second limiting ring (402) is arranged corresponding to the second one-way valve plate (502), the power output end of the second crushing hydraulic cylinder (206) is arranged through the second limiting ring (402), and the second limiting ring (402) is used to provide a swing fulcrum for the second crushing hydraulic cylinder (206).

Images