Coal mine fully mechanized mining paste filling working face tail slurry activator adding device

Abstract

The present application relates to coal mine paste filling technical field, especially to coal mine fully mechanized paste filling working face tail slurry activator adding device, adding device includes stirring tank, pivot, stirring tooth, large wheel, small wheel, liquid inlet part and L type liquid outlet pipe, pivot is arranged in stirring tank along vertical direction, stirring tooth is fixed on pivot, large wheel is concentrically arranged on the upper end of pivot with fixed structure, the circumferential rotation of large wheel drives the circumferential rotation of small wheel through corresponding transmission structure, the vertical section of liquid outlet pipe is connected with the liquid inlet part outside through small wheel, and the vertical section of liquid outlet pipe is connected with small wheel in fixed structure, the horizontal section of liquid outlet pipe can rotate with vertical section as axis, the side wall of horizontal section away from vertical section is provided with outlet, sliding plug for controlling outlet discharge is arranged in horizontal section in sliding structure, spring for resetting sliding plug is arranged in horizontal section, the addition of activator is controlled by rotating speed, which is easy to control without complex control system, and is more suitable for underground environment.

Description

Technical fields:

[0002] This invention relates to the field of coal mine paste filling technology, and in particular to a device for adding activator to tailings slurry in fully mechanized coal mining paste filling faces. Background technology:

[0004] As one of the green mining technology systems in coal mines, the main purpose of fully mechanized paste filling technology is to solve the problem of coal pressure caused by the "three downs and one up" (referring to coal mining, coal gangue, and coal seam), treat solid waste coal gangue and mine water, improve the coal resource recovery rate, and extend the service life of the mine.

[0005] Currently, in the application of fully mechanized coal mining paste backfilling technology, at the end of the backfilling operation, because the volume of the goaf cannot be accurately measured, in order to ensure the filling rate of the goaf, the total amount of backfill slurry prepared is often greater than the amount of goaf to be filled. As a result, excess backfill slurry is discharged to sedimentation tanks outside the working face, causing a waste of resources. The corresponding workload of cleaning the sedimentation tanks is large, and the waste material after cleaning is transported to the surface and discharged, causing environmental pollution. Therefore, the secondary resource utilization of tailings slurry from fully mechanized coal mining paste backfilling technology has become an urgent problem to be solved by those skilled in the art.

[0006] After discovering the above problems, our company established a special research group to find solutions. However, when the paste slurry reaches the initial setting time after being left for the appropriate period of time, it cannot meet the requirements and a specific activator needs to be added. This requires a separate addition device, which is cumbersome and cannot meet the needs of the complex environment downhole. Summary of the Invention:

[0008] To solve the above-mentioned technical problems, this invention provides a tailings slurry activator addition device for fully mechanized coal mining paste filling faces. The technical problem solved is that a separate addition control device needs to be designed, resulting in a complex structure that cannot adapt to the complex underground environment. To solve the above-mentioned technical problems, the technical solution adopted by this invention is:

[0009] A tailings slurry activator addition device for fully mechanized coal mining paste filling face, the addition device includes a mixing tank, a rotating shaft, mixing teeth, a large wheel, a small wheel, a liquid inlet and an L-shaped liquid outlet pipe, the rotating shaft is vertically arranged inside the mixing tank, and the mixing teeth are fixed on the rotating shaft;

[0010] The large wheel is concentrically mounted on the upper end of the rotating shaft with a fixed structure, and the circumference of the large wheel drives the circumference of the small wheel to rotate through a corresponding transmission structure.

[0011] The vertical section of the outlet pipe passes through the small wheel and is connected to the external inlet. The vertical section of the outlet pipe and the small wheel are connected in a fixed manner. The horizontal section of the outlet pipe can rotate around the vertical section as an axis. An outlet is provided on the side wall of the horizontal section away from the vertical section. A sliding plug for controlling the discharge of the outlet is provided in the horizontal section in a sliding manner. A spring for resetting the sliding plug is also provided in the horizontal section.

[0012] Furthermore, the large wheel drives the small wheel to rotate through a tooth meshing structure.

[0013] Furthermore, the large wheel drives the small wheel to rotate via a belt.

[0014] Furthermore, a sealing ring is provided between the sliding plug and the inner wall of the horizontal section.

[0015] Furthermore, the liquid inlet is located at the upper end of the adding device. The liquid inlet includes a housing, a liquid inlet pipe, and a rotary joint. The housing is connected to the rotary joint through the liquid inlet pipe, and the other end of the rotary joint is connected to the vertical section of the liquid outlet pipe.

[0016] Furthermore, the addition device is also equipped with a control cabinet, a concentration sensor, and a geared motor that drives the rotating shaft. The control cabinet is electrically connected to the concentration sensor and the geared motor respectively. The concentration sensor is installed inside the mixing tank, and a booster pump is installed on the liquid inlet pipe.

[0017] The beneficial effects of this invention are: the addition device uses rotational speed to control the addition of activator, which is easy to control and does not require a complex control system, making it more suitable for downhole environments; by changing the transmission ratio of the large and small wheels, the rotational speed of the small wheel is increased, thereby increasing the centrifugal force of the sliding plug, opening the outlet for adding activator, making addition convenient, less prone to errors, simple in structure, and effective, greatly saving money. Attached image description:

[0019] Figure 1 This is a partial cross-sectional structural diagram of the stirring and adding device of the present invention;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of some components of the present invention.

[0021] In the picture:

[0022] 1. Mixing tank; 2. Large wheel; 3. Small wheel; 4. Liquid inlet; 41. Tank body; 42. Liquid inlet pipe; 43. Rotary joint; 5. Liquid outlet pipe; 51. Vertical section; 52. Horizontal section; 6. Shaft; 7. Outlet; 8. Sliding plug; 9. Spring; 10. Sealing ring; 11. Booster pump; 12. Pressure sensor; 13. Mixing teeth; 14. Gear motor. Detailed implementation method:

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, reference will now be made to... Figure 1-2 The present invention will be further described in detail below with reference to the embodiments, so that the public can better understand the implementation method of the present invention. The specific implementation method of the present invention is as follows:

[0025] A tailings slurry activator addition device for fully mechanized coal mining paste filling face, the addition device includes a mixing tank 1, a rotating shaft 6, stirring teeth 13, a large wheel 2, a small wheel 3, a liquid inlet 4, and an L-shaped liquid outlet pipe 5. The rotating shaft 6 is vertically arranged inside the mixing tank 1, and the stirring teeth 13 are fixed on the rotating shaft 6.

[0026] The large wheel 2 is concentrically mounted on the upper end of the rotating shaft 6 with a fixed structure. The circumference of the large wheel 2 drives the small wheel 3 to rotate through a corresponding transmission structure. It should be noted that the large wheel 2 drives the small wheel 3 to rotate through a gear meshing structure, or the large wheel 2 drives the small wheel 3 to rotate through a belt. Specifically, the large wheel 2 and the small wheel 3 are connected through a gear meshing structure, or the large wheel 2 and the small wheel 3 are connected through a belt. The rotating shaft 6 drives the small wheel 3 to rotate through the large wheel 2. The transmission ratio is adjusted through this structure to increase the speed of the small wheel 3.

[0027] The vertical section 51 of the outlet pipe 5 passes through the small wheel 3 and is connected to the external inlet 4. The vertical section 51 of the outlet pipe 5 and the small wheel 3 are connected in a fixed structure. The horizontal section 52 of the outlet pipe 5 can rotate around the vertical section 51. An outlet 7 is provided on the side wall of the horizontal section 52 away from the vertical section 51. A sliding plug 8 for controlling the discharge of the outlet 7 is provided in the horizontal section 52 in a sliding structure. A spring 9 for resetting the sliding plug 8 is also provided in the horizontal section 52. A sealing ring 10 is provided between the sliding plug 8 and the inner wall of the horizontal section 52. After the rotation speed of the small wheel 3 increases to the corresponding speed, the sliding plug 8 overcomes the force of the spring 9 and opens the outlet 7, allowing the activator to be sprayed out.

[0028] Specifically, the liquid inlet 4 is located at the upper end of the adding device. The liquid inlet 4 includes a box 41, a liquid inlet pipe 42 and a rotary joint 43. The box 41 is connected to the rotary joint 43 through the liquid inlet pipe 42. The other end of the rotary joint 43 is connected to the vertical section 51 of the liquid outlet pipe 5. The box 41 can hold the activator.

[0029] In other embodiments, the adding device is also provided with a control cabinet, a concentration sensor 12 and a geared motor 14 for driving the rotating shaft 6 to rotate. The control cabinet is electrically connected to the concentration sensor 12 and the geared motor 14 respectively. The concentration sensor 12 is installed in the stirring tank 1, and a booster pump 11 is installed on the liquid inlet pipe 42.

[0030] The slurry in mixing tank 1 is set to 10 m³, and the rotation speed of shaft 6 is set to 10 r / min. When the concentration sensor 12 measures a concentration of 60%, the rotation speed needs to be increased to prevent further sedimentation of the paste material and reduced fluidity. The concentration sensor 12 sends a signal to the control cabinet. After receiving the signal, the control cabinet increases the rotation speed of shaft 6 to 20 r / min to increase the stirring intensity. Driven by the large wheel 2, the small wheel 3 rotates at 200 r / min. At this time, the sliding plug 8 overcomes the force of the spring 9, and the activator is sprayed out from the outlet 7. The flow rate is set to 10 kg / min by the booster pump 11. After the concentration sensor 12 measures a concentration of 73%, it sends a signal to the control cabinet again. After receiving the signal, the control cabinet reduces the rotation speed of shaft 6 to 10 r / min, and the corresponding sliding plug 8 closes the outlet 7 through the force of the spring 9. By adjusting the rotation speed, the amount of activator added can be adjusted. The amount added can also be calculated by the flow rate and the addition time, without the need to redesign the corresponding addition program. This achieves two goals at once and meets the current needs of downhole operations.

[0031] In the description of this invention, it should be understood that the terms "center," "upper," "lower," "left," "right," "front," "rear," "lower left," "upper right," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the stirring and adding device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

Claims

1. A tailings activation agent adding device for fully-mechanized coal mining paste filling working face, characterized in that: The adding device comprises a stirring tank (1), a rotating shaft (6), stirring teeth (13), a large wheel (2), a small wheel (3), a liquid inlet part (4) and an L-shaped liquid outlet pipe (5), the rotating shaft (6) is arranged in the stirring tank (1) in the vertical direction, and the stirring teeth (13) are fixed on the rotating shaft (6); The large wheel (2) is arranged on the upper end of the rotating shaft (6) in a fixed structure and concentrically, the large wheel (2) drives the small wheel (3) to rotate through corresponding transmission structure; The vertical section (51) of the liquid outlet pipe (5) is connected with the liquid inlet part (4) outside through the small wheel (3), and the vertical section (51) of the liquid outlet pipe (5) is connected with the small wheel (3) in a fixed structure, the horizontal section (52) of the liquid outlet pipe (5) can rotate around the vertical section (51) as the axis, the side wall of the horizontal section (52) away from the vertical section (51) is provided with an outlet (7), and the horizontal section (52) is provided with a sliding plug (8) for controlling the outlet (7) to discharge in a sliding structure, and the horizontal section (52) is further provided with a spring (9) for resetting the sliding plug (8).

2. The coal mine fully mechanized coal mining paste backfill working face tail slurry activator adding device according to claim 1, characterized in that: The large wheel (2) drives the small wheel (3) to rotate through the tooth engagement structure.

3. The coal mine fully mechanized coal mining paste backfill working face tail slurry activator adding device according to claim 1, characterized in that: The large wheel (2) drives the small wheel (3) to rotate through the belt.

4. The coal mine fully mechanized coal mining paste backfill working face tail slurry activator adding device according to claim 1, characterized in that: A sealing ring (10) is arranged between the sliding plug (8) and the inner wall of the horizontal section (52).

5. The coal mine fully mechanized coal mining paste backfill working face tail slurry activator adding device according to claim 1, characterized in that: The liquid inlet part (4) is arranged on the upper end of the adding device, the liquid inlet part (4) comprises a box body (41), a liquid inlet pipe (42) and a rotary joint (43), the box body (41) is connected with the rotary joint (43) through the liquid inlet pipe (42), and the other end of the rotary joint (43) is connected with the vertical section (51) of the liquid outlet pipe (5).

6. The coal mine fully mechanized paste filling working face tailings activator adding device according to claim 5, characterized in that: The adding device is further provided with a control cabinet, a concentration sensor (12) and a speed reducer motor (14) for driving the rotating shaft (6) to rotate, the control cabinet is electrically connected with the concentration sensor (12) and the speed reducer motor (14) respectively, the concentration sensor (12) is arranged in the stirring tank (1), and a booster pump (11) is arranged on the liquid inlet pipe (42).

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