Large-dip-angle fully-mechanized face guniting device

Abstract

The invention relates to the technical field of coal mine construction, and discloses a large-dip-angle fully-mechanized face guniting device which comprises a mechanical arm, the output end of the mechanical arm is fixedly connected with a main pipe and a synchronizing mechanism through a clamping block, and the large-dip-angle fully-mechanized face guniting device comprises a fixed pipe fixedly connected to the surface of the main pipe, a plurality of equally-divided mechanisms arranged on the surface of the fixed pipe with the fixed pipe as the axis and a grouting mechanism. The grouting mechanism is arranged at a main pipe guniting port and changes the flow speed of slurry at the port based on the construction condition in the working state, and the matching mechanism is arranged on the main pipe equally-dividing mechanism and is matched with the equally-dividing mechanism to enable the grouting mechanism to be close to or away from the grouting mechanism. The arc-shaped pieces are combined into a conical pipeline through the circular springs according to micro-crack operation, the grouting radius of the conical pipeline is decreased, the flow speed is increased, the micro-cracks can be better filled with grout, and when wide cracks are treated, the displacement pipes do not make contact with the arc-shaped pieces, and wide-area covering and grout spraying are conducted on crack opening areas.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine construction, and more particularly to a large-angle fully-mechanized mining face grouting device. Background Art

[0002] In the construction environment of a high-angle fully-mechanized mining face, due to the large inclination of the coal seam (usually exceeding 45°), the stability of the working face roof, side walls and surrounding rock of the goaf is significantly reduced. Under such working conditions, traditional support methods are easily affected by the gravity component, resulting in structural failure. The application of shotcrete devices can effectively improve the mechanical properties of the surrounding rock through active reinforcement technology, becoming a key process link to ensure construction safety.

[0003] Currently, the device is mounted on a mobile carrier by a robotic arm, and then the material is passed into the device by a high-pressure device, and then the top of the U-shaped mining hole wall and the side walls of the mining area are sprayed.

[0004] Although the above technical solution has solved the problem well, in the actual operation process, under complex geological conditions, there are still the following technical defects that need to be solved urgently. Since some fully mechanized mining faces are inclined and the inclination is too large, it is extremely difficult to spray the top of the cave wall. The slurry rebound rate is as high as 15% to 25% during high-pressure spraying, resulting in material waste. Although the pressure-reduced spraying technology can reduce splashing, it leads to a decrease in the density of the spray layer (porosity > 12%), which cannot meet the anti-seepage requirements. Summary of the Invention

[0005] The present invention discloses a large-angle fully-mechanized mining face spraying device, which solves the technical problem in the above-mentioned background technology that the spraying effect on the inclined fully-mechanized mining face is weak and difficult to control.

[0006] The present invention discloses a large-angle fully-mechanized mining face spraying device, comprising:

[0007] A robotic arm, wherein an output end of the robotic arm is fixedly connected to a main pipe via a clamping block;

[0008] The synchronization mechanism includes a fixed pipe fixedly connected to the surface of the main pipe;

[0009] Several groups of equally divided mechanisms are arranged on the surface of the fixed tube with the fixed tube as the axis;

[0010] The grouting mechanism is set at the main spraying port. When in working state, the slurry flow rate at the port is changed based on the construction situation.

[0011] The cooperating mechanism is arranged on the main dividing mechanism, and the cooperating dividing mechanism is close to or far away from the grouting mechanism.

[0012] As a preferred embodiment of the shotcreting device for a fully mechanized coal mining face with a large dip angle in the present invention, the following components are included: the equal division mechanism comprises a limiting block arranged on the surface of the fixed pipe, a long rod arranged inside the limiting block, and a short rod rotatably connected inside the long rod. A group of oil cloths is arranged on the surface of every two long rods, and a group of retaining nets is arranged on the surface of every two short rods. A fitting is also arranged inside the fixed pipe.

[0013] As a preferred embodiment of the shotcreting device for a fully mechanized coal mining face with a large dip angle in the present invention, the fixed pipe is threadedly connected to the main pipe. In the initial state, each long rod is inclined and forms an acute angle with the limiting block.

[0014] As a preferred embodiment of the shotcreting device for a fully mechanized coal mining face with a large dip angle in the present invention, the grouting mechanism comprises a flow-through pipe arranged at the port of the main pipe. Inside the flow-through pipe, several groups of installation slots are opened with the flow-through pipe as the axis, and an arc-shaped piece is rotatably connected inside each installation slot.

[0015] Several groups of arc-shaped pieces are separated from each other and do not contact in the initial state, and approach each other to form a relatively airtight cone in the working state.

[0016] As a preferred embodiment of the shotcreting device for a fully mechanized coal mining face with a large dip angle in the present invention, the matching mechanism comprises a rectangular block rotatably connected to the surface of the short rod. A displacement pipe is arranged inside the rectangular block. The displacement pipe is conical, and an annular groove is opened on the surface close to the arc-shaped piece. A circular spring is arranged inside the annular groove.

[0017] As a preferred embodiment of the shotcreting device for a fully mechanized coal mining face with a large dip angle in the present invention, the fitting comprises a bottom plate arranged inside the fixed pipe. A cylinder and a telescopic cylinder body are respectively arranged on the surface of the bottom plate. The output end of the telescopic cylinder body is provided with a contact block, and a liquid inlet hole is opened on the side of the telescopic cylinder body far from the contact block.

[0018] As a preferred embodiment of the shotcreting device for a fully mechanized coal mining face with a large dip angle in the present invention, the end of the telescopic cylinder body is fixedly connected to the contact block, and the contact block contacts the rectangular block in the working state.

[0019] As a preferred embodiment of the shotcreting device for a fully mechanized coal mining face with a large dip angle in the present invention, a negative pressure pipe is fixedly connected inside the other end of the telescopic cylinder body. When the liquid inlet hole is in a vertical state with respect to the center of gravity of the telescopic cylinder body and the ground, the horizontal height is higher than that of the fixed pipe.

[0020] As a preferred embodiment of the shotcreting device for a fully mechanized coal mining face with a large dip angle in the present invention, both the retaining net and the oil cloth are made of flexible materials, and each oil cloth and the long rod are installed to form a complete chamber.

[0021] The beneficial effects of the present invention are as follows: Through the setting of the grouting mechanism and the matching mechanism, when the device performs spraying, for micro-cracks, the circular spring combines the arc-shaped pieces into a conical pipe, reducing the grouting radius and increasing the flow rate, so that the slurry can better fill the micro-cracks. When dealing with wide cracks, the displacement pipe does not contact the arc-shaped pieces, and wide-area spraying is carried out on the crack opening area.

[0022] Furthermore, when dealing with micro-cracks, the grouting mechanism is pushed by the matching part to spray on the top of the roadway curve. While the flow rate increases, the oilcloth intercepts the spraying liquid, and the gravel falling due to pressure impact on the fully-mechanized mining face is intercepted by the net. When dealing with wide cracks, the flow rate becomes relatively slow, and the oilcloth and the net will open to form a wide-range interception space to protect the construction workers.

[0023] Furthermore, during interception, the impurities in the spraying liquid are separated from the slurry. The slurry is stored inside the chamber formed by the oilcloth. Subsequently, the telescopic cylinder is driven by the cylinder to move. Since the position of the liquid inlet hole is relatively high, the spraying liquid will be screened for the second time. The heavier slurry particles fall inside the chamber and do not enter the liquid inlet hole for circulation, saving the consumption of materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the overall schematic diagram of the device of the present invention;

[0025] Figure 2 is a perspective view of a partial section of the present invention;

[0026] Figure 3 is another perspective view of a partial section of the present invention;

[0027] Figure 4 is a third perspective view of a partial section of the present invention;

[0028] Figure 5 is the schematic diagram of the grouting mechanism and the matching mechanism of the present invention;

[0029] Figure 6 is the schematic diagram of the grouting mechanism of the present invention;

[0030] Figure 7 is the schematic diagram of the matching part of the present invention.

[0031] In the figure: 100, robotic arm; 101, main pipe; 200, synchronization mechanism; 201, fixed pipe; 210, limit block; 211, long rod; 212, short rod; 213, oilcloth; 214, net; 220, fitting; 2201, cylinder; 2202, telescopic cylinder body; 2203, contact block; 2204, liquid inlet hole; 300, grouting mechanism; 301, flow-through pipe; 302, installation notch; 303, arc-shaped piece; 400, cooperation mechanism; 401, rectangular block; 402, displacement pipe; 403, circular spring. Detailed implementation mode

[0032] Now, the subject matter described herein will be discussed with reference to example embodiments. 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. Without departing from the scope of protection of the content of this specification, changes can be made to the functions and arrangements of the elements discussed. Each example can omit, substitute, or add various processes or components as needed. Additionally, the features described in some examples can also be combined in other examples.

[0033] In an embodiment of the present invention, a shotcreting device for a fully-mechanized mining face with a large dip angle is disclosed. As Figures 1 to 7 shown, it includes a robotic arm 100, and the output end of the robotic arm 100 is fixedly connected to a main pipe 101 through a chuck;

[0034] A synchronization mechanism 200, including a fixed pipe 201 fixedly connected to the surface of the main pipe 101;

[0035] A number of equal division mechanisms are arranged on the surface of the fixed pipe 201 with the fixed pipe 201 as the axis;

[0036] A grouting mechanism 300 is arranged at the shotcreting port of the main pipe 101. In the working state, it changes the flow rate of the slurry at the port based on the construction situation.

[0037] A cooperation mechanism 400 is arranged on the equal division mechanism of the main pipe 101 to cooperate with the equal division mechanism to move the grouting mechanism 300 closer to or farther away.

[0038] The equal division mechanism includes a limit block 210 arranged on the surface of the fixed pipe 201, a long rod 211 arranged inside the limit block 210, and a short rod 212 rotatably connected inside the long rod 211. A group of oilcloths 213 are arranged on the surface of every two long rods 211, and a group of nets 214 are arranged on the surface of every two short rods 212. A fitting 220 is also arranged inside the fixed pipe 201.

[0039] The fitting 220 drives the fitting mechanism 400 to perform a linear reciprocating motion along the length direction of the main pipe 101. When the cylinder 2201 moves to the maximum stroke, the grouting mechanism 300 will become a combined conical shape. The arc-shaped piece 303 moves in the same direction towards the axis direction of the flow-through pipe 301 under the force of the fitting mechanism 400 until each arc-shaped piece 303 contacts each other.

[0040] The fixed pipe 201 is threadedly connected to the main pipe 101. In the initial state, each long rod 211 is inclined and forms an acute angle with the limit block 210.

[0041] The limit block 210 on the fixed pipe 201 restricts the rotation of the long rod 211. When the cylinder 2201 moves to the maximum stroke, each long rod 211 rotates towards the axis direction of the main pipe 101 and always forms a conical shape during the movement. When the long rod 211 rotates inside the limit block 210, the short rod 212 provides a restriction for the long rod 211 to expand or contract outwards. The maximum opening range of the long rod 211 is smaller than the radius of the short rod 212.

[0042] The grouting mechanism 300 includes a flow-through pipe 301 arranged at the port of the main pipe 101. Inside the flow-through pipe 301, several groups of installation slots 302 are opened with the flow-through pipe 301 as the axis. Each installation slot 302 is rotatably connected with an arc-shaped piece 303. The arc-shaped pieces 303 are close to each other to form a conical shape, and when they rotate away from each other, they are an open circle. The arc-shaped piece 303 rotates in the installation slot 302, and the maximum rotation angle is ninety degrees. The inside of the flow-through pipe 301 is a pipe body for flowing positive-pressure slurry. When the device sprays slurry as a whole, it is inclined towards the large dip angle of the fully-mechanized coal face, and the horizontal plane of the recycled sprayed slurry collected inside is still parallel to the ground.

[0043] Several groups of arc-shaped pieces 303 are away from each other and do not contact in the initial state, and approach each other to form a relatively airtight conical shape in the working state.

[0044] The fitting mechanism 400 includes a rectangular block 401 rotatably connected to the surface of the short rod 212. A displacement pipe 402 is arranged inside the rectangular block 401. The displacement pipe 402 is conical, and an annular groove is opened near the surface of the arc-shaped piece 303. A circular spring 403 is arranged inside the annular groove.

[0045] The fitting 220 includes a bottom plate arranged inside the fixed pipe 201. A cylinder 2201 and a telescopic cylinder body 2202 are respectively arranged on the surface of the bottom plate. The output end of the telescopic cylinder body 2202 is provided with a contact block 2203. A liquid inlet hole 2204 is opened on one side of the telescopic cylinder body 2202 away from the contact block 2203. When the liquid surface is readjusted to be perpendicular to the direction of gravity, that is, the horizontal plane, the flow stops and static equilibrium is reached, and the slurry is stored in the oil cloth 213.

[0046] The end of the telescopic cylinder body 2202 is fixedly connected to the contact block 2203. The contact block 2203 is in contact with the rectangular block 401 during operation. The telescopic cylinder body 2202 is composed of a hollow tube body and a solid cylinder. The part in contact with the contact block 2203 is a solid cylinder. The negative pressure pipeline inside the telescopic cylinder body 2202 guides the liquid from the liquid inlet hole 2204 into the interior of the telescopic cylinder body 2202. Subsequently, the cylinder 2201 drives the contact block 2203 to move, thereby driving the solid cylinder of the telescopic cylinder body 2202 to compress towards the negative pressure pipeline, assisting in pressing down the slurry flowing into the liquid inlet hole 2204. When the negative pressure pipeline does not pump, the solid cylinder moves to block the liquid inlet hole 2204, preventing the slurry in the oil cloth 213 from entering the interior of the telescopic cylinder body 2202.

[0047] The other end of the telescopic cylinder body 2202 is fixedly connected with a negative pressure pipeline inside. When the liquid inlet hole 2204 is in a state perpendicular to the center of gravity direction of the telescopic cylinder body 2202 and the ground, the horizontal height is higher than that of the fixed pipe 201.

[0048] Both the retaining net 214 and the oil cloth 213 are made of flexible materials, and each oil cloth 213 and the long rod 211 are installed to form a complete chamber. Specific implementation method;

[0050] Connect the main pipe 101 of the device to the inside of the positive pressure pipeline of the well - stirred slurry. Then, install the robotic arm 100 on the carrier device. Connect the negative pressure pipeline to the pumping device. While the negative pressure device is pumping, the slurry is secondarily processed and then sent into the positive pressure pipeline. Subsequently, shotcreting treatment is carried out on the U - shaped top wall of the roadway in the fully - mechanized coal mining face. When there are many micro - cracks in the top wall, the cylinder 2201 drives the contact block 2203 to move towards the shotcreting direction. Then, the rectangular block 401 starts to move upward. At this time, the solid column part of the telescopic cylinder 2202 starts to move, opening the liquid inlet hole 2204. The rectangular block 401 drives the circular spring 403 to approach the grouting mechanism 300. When the displacement pipe 402 slides on the flow - through pipe 301 and contacts the installation notch 302, the displacement pipe 402 is pushed a small distance by the cylinder 2201 again. The circular spring 403 squeezes the displacement pipe 402, causing each arc - shaped piece 303 to rotate closer to each other until a conical nozzle is formed. The cylinder 2201 stops working. When the cylinder 2201 moves, it not only drives the telescopic cylinder 2202 to move and pushes the matching mechanism 400, but also the included angle between the short rod 212 rotatably connected to the rectangular block 401 becomes smaller, reducing the maximum radius of the cone formed by the long rod 211 and the short rod 212. Each long rod 211 approaches the axis of the main pipe 101. Because the shotcreting flow rate increases, when the shotcrete reaches the micro - cracks, it will hit the U - shaped top wall and then quickly bounce back. Subsequently, the primary screening is carried out by the net 214 connected by the short rod 212. The mixed liquid falling due to the impact is screened, intercepting the coal gangue knocked down by the flow rate and the flaky materials during construction. Then, the shotcrete flows into the chamber formed by the long rod 211 and the oilcloth 213, and then falls to the oilcloth 213 opened by the limit block 210. At this time, the liquid inlet hole 2204 on the telescopic cylinder 2202 has not closed. When the slurry in the chamber accumulates to a certain height, the slurry will enter its interior through the cylinder 2201. The slurry is recovered along the negative pressure pipeline and then sent into the grouting mechanism 300 again through the main pipe 101 for shotcreting;

[0051] For wide crack shotcreting, the cylinder 2201 moves back towards the fixed pipe 201, pulling back the contact block 2203. At this time, the solid column part inside the telescopic cylinder body 2202 moves towards the liquid inlet hole 2204. Meanwhile, the rectangular block 401 descends, increasing the angle formed by the short rod 212 and the long rod 211, and the radius of the opened oilcloth 213 increases synchronously. Since the short rod 212 is connected to the net 214 and the net 214 is connected to the oilcloth 213, at this time the net 214 descends and gradually fully opens. Since the arc-shaped piece 303 is not restricted by the circular spring 403 at this time, the arc-shaped piece 303 expands coaxially outwards, the shotcreting radius increases, and the flow rate decreases. At the same time, the slurry is sprayed in a scattered state. Due to the decrease in the flow rate, its spraying radius increases, and the opened net 214 and oilcloth 213 provide protection simultaneously. After the shotcreting is completed, the main pipe 101 is closed, and the cylinder 2201 is driven again to move closer to the rectangular block 401, opening the liquid inlet hole 2204. Due to the negative pressure generated by the rise of the solid column part, the slurry performs a third selection of the secondary filtered liquid inside the device. Subsequently, the negative pressure device is turned on to make the negative pressure pipeline work, and the final slurry is pumped. After the pumping is completed, the robotic arm 100 tilts to shake out the coal gangue and flaky building materials on the net 214.

[0052] The embodiments of the present invention have been described above, but 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 shotcreting device for fully mechanized mining face with large dip angle, characterized in that Comprising; (100), the output end of which is fixedly connected with (101) through a clamping block; (200), including (201) fixedly connected to the surface of (101); A number of equal division mechanisms, which are arranged on the surface of (201) with (201) as the axis; (300), which is arranged at the slurry spraying port of (101), and changes the slurry flow rate at the port based on the construction conditions during the working state. (400), which is arranged on the equal division mechanism of (101) and approaches or moves away from (300) in cooperation with the equal division mechanism.

2. The shotcreting device for fully-mechanized mining face with large dip angle according to claim 1, characterized in that The equal division mechanism includes (210) arranged on the surface of (201), (211) arranged inside (210), and (212) rotatably connected inside (211). A group of (213) is arranged on the surface of every two (211), and a group of (214) is arranged on the surface of every two (212). (220) is also arranged inside (201).

3. The shotcreting device for fully-mechanized mining face with large dip angle according to claim 2, wherein, The (201) is threadedly connected with (101). In the initial state, each (211) is inclined and forms an acute angle with (210).

4. The shotcreting device for fully-mechanized mining face with large dip angle according to claim 3, wherein, The (300) includes (301) arranged at the port of (101). Inside (301), a number of groups of (302) are opened with (301) as the axis, and (303) is rotatably connected inside each (302).

5. A shotcreting device for a fully mechanized mining face with a large dip angle according to claim 4, characterized in that, A number of groups of (303) are away from each other and do not contact in the initial state, and approach each other to form a relatively airtight cone in the working state.

6. The shotcreting device for fully-mechanized mining face with large dip angle according to claim 5, characterized in that, The (400) includes (401) rotatably connected to the surface of (212). Inside (401), (402) is arranged. (402) is conical, and a ring-shaped notch is opened on the surface close to (303). (403) is arranged inside the ring-shaped notch.

7. A shotcreting device for a fully mechanized mining face with a large dip angle according to claim 6, characterized in that, The (220) includes a bottom plate arranged inside (201). (2201) and (2202) are respectively arranged on the surface of the bottom plate. The output end of the (2202) is provided with (2203), and a (2204) is opened on the side of the (2202) surface away from (2203).

8. A shotcreting device for a fully mechanized coal mining face with a large dip angle according to claim 7, characterized in that, The end of the (2202) is fixedly connected with the (2203), and the (2203) contacts with the (401) during the working state.

9. The shotcreting device for fully-mechanized mining face with large dip angle according to claim 8, characterized in that, A negative pressure pipeline is fixedly connected inside the other end of the (2202). When the (2204) is in a state perpendicular to the center of gravity direction between the (2202) and the ground, the horizontal height is higher than that of the (201).

10. A shotcreting device for a fully-mechanized mining face with a large dip angle according to claim 9, characterized in that, (214) and (213) are both made of flexible materials, and each (213) and (211) are installed to form a complete chamber.

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