Gangue grouting system

Abstract

The utility model discloses a coal gangue grouting system which comprises a ball mill, a reservoir, a slurrying tank and a plurality of grouting wells. The device has the advantages that the first concentration meter and the second concentration meter are arranged to detect the outlet slurry concentrations of the ball mill and the slurrying tank respectively, and the opening degrees of the first adjusting valve and the second adjusting valve are convenient to adjust; by arranging the flow sensor at the grouting well, the blocking condition of the branch pipe can be detected, when the branch pipe is blocked, the second control valve is closed, the third adjusting valve is opened, water in the reservoir can be introduced into the branch pipe to achieve dredging, and the automation degree is high.

Description

Technical field:

[0001] The utility model relates to the technical field of coal gangue grouting, in particular to a coal gangue grouting system. Background technology:

[0002] During coal mining, the overlying rock strata are affected by mining, ground pressure, and the weight of the rock, causing deformation. This can lead to ground subsidence, groundwater level decline, and geological disasters. Consequently, mine-backfill technology has been proposed. This technology involves slurrying solid waste, such as gangue, into the goaf or the absorptive space of the mining area through a slurrying system. This method effectively disposes the gangue and promotes sustainable mine development. Existing gangue slurrying systems primarily crush the gangue, milling it in a ball mill, then transferring it to a slurrying tank for slurrying. After slurrying, the slurry is directly pumped to various grouting wells for grouting. However, as the system operates, the grouting pipes between the slurry pumps and the grouting wells are prone to blockage, hindering smooth grouting. Furthermore, existing grouting wells are primarily vertically positioned. Complex terrain above the absorptive space can complicate vertical drilling. Furthermore, if farmland or buildings are located above the absorptive space, land acquisition compensation issues may arise, increasing production costs. Utility model content:

[0003] The purpose of the utility model is to provide a coal gangue grouting system.

[0004] The purpose of the utility model is implemented by the following technical solutions: a coal gangue grouting system, which includes a ball mill, a water reservoir, a slurry tank and several grouting wells,

[0005] The outlet of the ball mill is connected to the inlet of the three-way distributing valve, and a first concentration meter is installed at the outlet of the ball mill; the two outlets of the three-way distributing valve are respectively connected to the inlets of the two slurrying tanks, and the outlets of the two slurrying tanks are respectively connected to the inlet of the main pipeline through a first pipeline, and a first control valve and a second concentration meter are sequentially installed on the first pipeline. The main pipeline is connected to the inlet of the grouting pipe of each grouting well through a branch pipe, and a second control valve and a slurry pump are sequentially provided on the branch pipe;

[0006] The outlet of the water reservoir is connected to the inlet of the first water pump and the second water pump respectively. The outlet of the first water pump is connected to the water inlet of the ball mill through a first water pipe, and a first regulating valve is provided on the first water pipe; the outlet of the second water pump is connected to the water inlet of each pulping tank through a second water pipe, and a second regulating valve is installed on the second water pipe; the outlet of the water reservoir is connected to the branch pipe on the outlet side of each second control valve through a third water pipe, and a third regulating valve is installed on the third water pipe; the first concentration meter and the second concentration meter are both connected to the input end of the controller, and the output end of the controller is connected to the first regulating valve and the second regulating valve respectively.

[0007] Furthermore, the grouting well includes a delivery pipe, an outer casing, a grouting pipe and a grouting inclined hole connected to the grouting space, the grouting inclined hole includes a mounting hole and an inclined hole connected up and down, the outer casing is fixed on the inner wall of the mounting hole, and the delivery pipe is separately arranged inside the outer casing; an inlet fixed well is provided at the orifice position of the mounting hole, the top end of the outer casing and the grouting pipe are buried in the inlet fixed well, and the bottom outlet of the grouting pipe is connected to the inlet of the inlet fixed well; an outlet fixed well is fixed between the bottom inner wall of the outer casing and the bottom outer wall of the delivery pipe, and the bottom end of the outlet fixed well is connected to the orifice of the inclined hole; a control valve is provided on the grouting pipe, and a flow sensor is provided on the grouting pipe below the control valve, the flow sensor is connected to the input end of the controller, and the output end of the controller is connected to the second control valve and the third regulating valve.

[0008] Furthermore, it also includes an axle seat, a rotating shaft and a pull rope. The axle seat is fixed on the outer wall of the grouting pipe, and the rotating shaft arranged laterally is rotatable on the axle seat, and a torsion spring is arranged between the rotating shaft and the axle seat; one end of the pull rope is wrapped around the outside of the rotating shaft, and the other end of the pull rope is fixedly connected to the outer wall of the bottom end of the conveying pipe; an angle sensor is installed at the end of the rotating shaft, and the angle sensor is connected to the input end of the controller, and the output end of the controller is connected to the slurry pump and the second control valve.

[0009] Furthermore, a guide wheel for guiding the pull rope is installed on the shaft seat below the rotating shaft.

[0010] Furthermore, a one-way valve is installed at the bottom end of the delivery pipe.

[0011] Furthermore, a plurality of guide structures that are in movably contact with the inner wall of the outer sleeve are provided on the lower outer wall of the delivery pipe.

[0012] Furthermore, the guide structure includes a fixed ring and rollers. The fixed ring is fixedly sleeved on the outer wall of the outer sleeve. Several rollers are rotatably provided on the outer wall of the fixed ring and are in rolling contact with the inner wall of the outer sleeve. The rollers are evenly arranged along the circumferential direction of the fixed ring.

[0013] The advantages of the present invention are as follows: by setting a first concentration meter and a second concentration meter to detect the outlet slurry concentration of the ball mill and the slurry tank respectively, it is convenient to adjust the opening of the first regulating valve and the second regulating valve; by setting a flow sensor at the grouting well, the blockage of the branch pipe can be detected. When the branch pipe is found to be blocked, the second control valve can be closed and the third regulating valve can be opened to introduce water from the reservoir into the branch pipe to achieve dredging, and the degree of automation is high. By setting an inclined grouting hole, the grouting well can be inclinedly drilled according to the actual terrain, solving the problems of difficulty and high cost in vertical drilling. In addition, an angle sensor is set at the grouting well. When the inclined grouting hole is broken, the angle information can be sent in time, and then the corresponding second control valve and slurry pump can be cut off to stop grouting, avoid slurry overflow, and reduce losses. Description of the drawings:

[0014] Figure 1 Schematic diagram of the overall structure of this embodiment.

[0015] Figure 2 Schematic diagram of the grouting well structure.

[0016] Figure 3 for Figure 2 A partial enlarged view of .

[0017] Figure 4 Schematic diagram of the structure of the guide structure.

[0018] Figure 5 This is a diagram of the controller connection.

[0019] Ball mill 1, water reservoir 2, slurry making tank 3, grouting well 4, delivery pipe 41, outer casing 42, grouting pipe 43, grouting inclined hole 44, inlet fixed well 45, outlet fixed well 46, control valve 47, flow sensor 48, shaft seat 49, rotating shaft 410, pull rope 411, torsion spring 412, angle sensor 413, guide wheel 414, one-way valve 415, guide structure 416, fixing ring 4161, roller 4162, three-way dispensing valve 5, first concentration meter 6, first pipeline 7, main pipeline 8, first control valve 9, second concentration meter 10, branch pipe 11, second control valve 12, slurry pump 13, first water pump 14, second water pump 15, first water pipe 16, first regulating valve 17, second water pipe 18, third water pipe 19, third regulating valve 20, controller 21, second regulating valve 22. Specific implementation method:

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] like Figures 1 to 5 As shown, the gangue grouting system includes a ball mill 1, a water reservoir 2, a slurry tank 3 and several grouting wells 4. The outlet of the ball mill 1 is connected to the inlet of a three-way material distribution valve 5, and a first concentration meter 6 is installed at the outlet of the ball mill 1; the two outlets of the three-way material distribution valve 5 are respectively connected to the inlets of the two slurry tanks 3, and the outlets of the two slurry tanks 3 are respectively connected to the inlet of the main pipeline 8 through a first pipeline 7, and a first control valve 9 and a second concentration meter 10 are sequentially installed on the first pipeline 7. The main pipeline 8 is connected to the inlet of the grouting pipe of each grouting well 4 through a branch pipe 11, and a second control valve 12 and a slurry pump 13 are sequentially provided on the branch pipe 11; the outlet of the water reservoir 2 is respectively connected to the first water pump 14, the second water pump 15 and the second water pump 16. The inlet of the pump 15 is connected, and the outlet of the first water pump 14 is connected to the water inlet of the ball mill 1 through the first water pipe 16, and a first regulating valve 17 is provided on the first water pipe 16; the outlet of the second water pump 15 is connected to the water inlet of each pulping tank 3 through the second water pipe 18, and a second regulating valve 22 is installed on the second water pipe 18; the outlet of the water reservoir 2 is connected to the branch pipe 11 on the outlet side of each second control valve 12 through the third water pipe 19, and a third regulating valve 20 is installed on the third water pipe 19; the first concentration meter 6 and the second concentration meter 10 are both connected to the input end of the controller 21, and the output end of the controller 21 is connected to the first regulating valve 17 and the second regulating valve 22 respectively. The ball mill 1 is a wet ball mill. The slurry discharged from the ball mill 1 is distributed to the slurry tank 3 through the three-way distribution valve 5. The two slurry tanks 3 serve as backup for each other. The second water pump 15 sends the water in the water reservoir 2 to the slurry tank 3 to adjust the slurry concentration to the process concentration. The slurry is then sent to the main pipeline 8 through the corresponding first pipeline 7, and then distributed to each grouting well 4 through each branch pipe 11 for grouting.

[0022] The grouting well 4 includes a delivery pipe 41, an outer sleeve 42, a grouting pipe 43 and a grouting inclined hole 44 connected to the grouting space. The grouting inclined hole 44 includes a mounting hole 441 and an inclined hole 442 connected up and down. The outer sleeve 42 is fixed on the inner wall of the mounting hole 441, and the delivery pipe 41 is separately arranged inside the outer sleeve 42; an inlet fixed well 45 is provided at the orifice position of the mounting hole 441, the top ends of the outer sleeve 42 and the grouting pipe 43 are buried in the interior of the inlet fixed well 45, and the bottom outlet of the grouting pipe 43 is connected to the inlet of the inlet fixed well 45; an outlet fixed well 46 is fixed between the bottom inner wall of the outer sleeve 42 and the bottom outer wall of the delivery pipe 41, and the bottom end of the outlet fixed well 46 is connected to the orifice of the inclined hole 442; the grouting inclined hole 44 is arranged at an angle and connected to the grouting space (the delamination space in the mining area) to realize grouting without vertical drilling, which can solve the influence of complex terrain or ground buildings on vertical drilling, and is more flexible and highly applicable. A one-way valve 415 is installed at the bottom end of the delivery pipe 41. Since the later stage of grouting is a pressurized operation, the one-way valve 415 can prevent the slurry from flowing back up. At the same time, if the delivery pipe 41 breaks, it can prevent the slurry in the grouting space from flowing back up to the delivery pipe 41 and then leaking out of the break. A control valve 47 is installed on the grouting pipe 43 to control the opening and closing of the grouting pipe 43. A flow sensor 48 is installed on the grouting pipe 43 below the control valve 47. The flow sensor 48 is connected to the input end of the controller 21, and the output end of the controller 21 is connected to the second control valve 4712 and the third regulating valve 20. The flow rate in the grouting pipe 43 is detected by the flow sensor 48, and the detected flow rate information is transmitted to the controller 21. When the detected flow rate is lower than the set flow rate, it indicates that the branch pipe 11 is blocked. At this time, the second control valve 12 is closed, the third regulating valve 20 is opened, and the water in the water reservoir 2 is introduced into the branch pipe 11 through the third water pipe 19 for unblocking. When the flow sensor 48 detects that the flow rate has returned to the set value, the third regulating valve 20 is closed and the second control valve 12 is opened. Several guide structures 416 are provided on the lower outer wall of the delivery pipe 41, which are in active contact with the inner wall of the outer sleeve 42 to facilitate the installation of the delivery pipe 41. Specifically, the guide structures 416 include a fixed ring 4161 and rollers 4162. The fixed ring 4161 is fixedly mounted on the outer wall of the outer sleeve 42, and a plurality of rollers 4162 are rotatably provided on the outer wall of the fixed ring 4161, which are in rolling contact with the inner wall of the outer sleeve 42. The rollers 4162 are evenly arranged along the circumference of the fixed ring 4161. During the process of lowering the delivery tube 41 , the roller 4162 rolls along the inner wall of the outer sleeve 42 , which can prevent the delivery tube 41 from getting stuck in the outer sleeve 42 and enable the delivery tube 41 to be lowered smoothly.

[0023] It also includes a shaft seat 49, a rotating shaft 410, and a pull rope 411. The shaft seat 49 is fixed to the outer wall of the grouting pipe 43. The horizontally arranged rotating shaft 410 is rotatably mounted on the shaft seat 49. A torsion spring 412 is disposed between the rotating shaft 410 and the shaft seat 49. One end of the pull rope 411 is wrapped around the outside of the rotating shaft 410, and the other end of the pull rope 411 is fixedly connected to the bottom outer wall of the delivery pipe 41. A guide wheel 414 is mounted on the shaft seat 49 below the rotating shaft 410 to guide the pull rope 411. An angle sensor 413 is mounted at the end of the rotating shaft 410. The angle sensor 413 is connected to the input end of the controller 21. The output end of the controller 21 is connected to the slurry pump 13 and the second control valve 12. After the grouting well 4 is installed, it is possible to determine whether the delivery pipe 41 is broken by observing the displacement of the pull rope 411; when the delivery pipe 41 is broken, the pull rope 13 will drive the rotating shaft 410 to rotate. At this time, the angle sensor 413 will detect the angle signal and send it to the controller 21. At this time, the second control valve 12 will be cut off, and the slurry pump 13 will be shut down to stop grouting.

[0024] The specific process is as follows:

[0025] (1) The controller 21 sets the standard concentration value C1 at the outlet of the ball mill 1, and the first concentration detector detects the outlet slurry concentration of the ball mill 1 in real time, and uploads the detected real-time concentration value C2 to the controller 21;

[0026] When C2>C1, the opening of the first regulating valve 17 is increased until the opening of the first regulating valve 17 is maintained when C2=C1;

[0027] When C2 < C1, the opening of the first regulating valve 17 is reduced until the opening of the first regulating valve 17 is maintained when C2 = C1;

[0028] (2) The controller 21 sets the standard concentration value of the outlet of the pulping tank 3 to C3, and the second concentration detector detects the outlet pulp concentration of the pulping tank 3 in real time, and uploads the detected real-time concentration value C4 to the controller 21;

[0029] When C4>C3, the opening of the second regulating valve 22 is increased until the opening of the second regulating valve 22 is maintained when C2=C1;

[0030] When C4<C3, the opening of the second regulating valve 22 is reduced until C2=C1, at which time the opening of the second regulating valve 22 is maintained.

[0031] (3) The minimum flow value Q1 and the maximum flow value Q2 of the grouting pipe 43 are set by the controller 21, and the flow sensor 48 detects the flow of the grouting pipe 43 in real time and uploads the detected real-time flow value Q3 to the controller 21;

[0032] When Q3 < Q1, the second control valve 12 is closed and the third regulating valve 20 is opened. It is not until Q3 > Q2 that the third regulating valve 20 is closed and the second control valve 12 is opened.

[0033] (4) The angle sensor 413 is used to detect the rotation angle of the rotating shaft in real time and transmit the detected data to the controller 21. When the controller 21 receives the angle data transmitted by the angle sensor 413 and the data > 0, it controls the slurry pump 13 to stop operating and closes the second control valve 12.

[0034] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. Coal gangue grouting system, characterized in that, It includes a ball mill, a water reservoir, a slurry tank and several grouting wells. The outlet of the ball mill is connected to the inlet of a three-way distributing valve, and a first concentration meter is installed at the outlet of the ball mill; the two outlets of the three-way distributing valve are respectively connected to the inlets of the two slurry tanks, and the outlets of the two slurry tanks are respectively connected to the inlet of the main pipeline through a first pipeline, on which a first control valve and a second concentration meter are sequentially installed. The main pipeline is connected to the inlet of the grouting pipe of each grouting well through a branch pipe, and a second control valve and a slurry pump are sequentially provided on the branch pipe. The outlet of the water reservoir is connected to the inlet of the first water pump and the second water pump respectively. The outlet of the first water pump is connected to the water inlet of the ball mill through a first water pipe, and a first regulating valve is provided on the first water pipe; the outlet of the second water pump is connected to the water inlet of each pulping tank through a second water pipe, and a second regulating valve is installed on the second water pipe; the outlet of the water reservoir is connected to the branch pipe on the outlet side of each second control valve through a third water pipe, and a third regulating valve is installed on the third water pipe; the first concentration meter and the second concentration meter are both connected to the input end of the controller, and the output end of the controller is connected to the first regulating valve and the second regulating valve respectively.

2. The gangue grouting system according to claim 1, characterized in that: The grouting well includes a delivery pipe, an outer casing, a grouting pipe and a grouting inclined hole connected to the grouting space. The grouting inclined hole includes a mounting hole and an inclined hole connected up and down. The outer casing is fixed on the inner wall of the mounting hole, and the delivery pipe is separately arranged inside the outer casing; an inlet fixed well is provided at the orifice position of the mounting hole, the top of the outer casing and the grouting pipe are buried in the inlet fixed well, and the bottom outlet of the grouting pipe is connected to the inlet of the inlet fixed well; an outlet fixed well is fixed between the bottom inner wall of the outer casing and the bottom outer wall of the delivery pipe, and the bottom end of the outlet fixed well is connected to the orifice of the inclined hole; a control valve is provided on the grouting pipe, and a flow sensor is provided on the grouting pipe below the control valve, the flow sensor is connected to the input end of the controller, and the output end of the controller is connected to the second control valve and the third regulating valve.

3. The gangue grouting system according to claim 2, characterized in that: It also includes an axle seat, a rotating shaft and a pull rope. The axle seat is fixed on the outer wall of the grouting pipe, and the horizontally arranged rotating shaft is rotated on the axle seat. A torsion spring is arranged between the rotating shaft and the axle seat; one end of the pull rope is wrapped around the outside of the rotating shaft, and the other end of the pull rope is fixedly connected to the outer wall of the bottom end of the conveying pipe; an angle sensor is installed at the end of the rotating shaft, and the angle sensor is connected to the input end of the controller, and the output end of the controller is connected to the slurry pump and the second control valve.

4. The gangue grouting system according to claim 3, characterized in that: A guide wheel for guiding the pull rope is installed on the shaft seat below the rotating shaft.

5. The gangue grouting system according to claim 2, characterized in that: A one-way valve is installed at the bottom end of the delivery pipe.

6. The gangue grouting system according to claim 2, characterized in that: A plurality of guide structures that are in movably contact with the inner wall of the outer sleeve are arranged on the lower outer wall of the delivery pipe.

7. The gangue grouting system according to claim 6, characterized in that: The guide structure includes a fixed ring and rollers. The fixed ring is fixedly sleeved on the outer wall of the outer sleeve. A plurality of rollers are rotatably provided on the outer wall of the fixed ring and are in rolling contact with the inner wall of the outer sleeve. The plurality of rollers are evenly arranged along the circumferential direction of the fixed ring.

Images