Anti-blocking device for underground gangue surge bin of coal mine
By installing the bearing mounting seat assembly and spiral stirring shaft in the underground gangue buffer chamber of coal mine, combined with the annular compressed air fluidization system, the problem of blockage of the discharge port of the gangue buffer chamber is solved, and the smooth flow and stable discharge of the gangue particles are achieved.
Patent Information
- Application Number
- CN202421421521.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-21
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-06-21
AI Technical Summary
Due to the influence of large dust and external water, the underground gangue buffer bins in coal mines often have bridges, arches, and walls of sticky walls, resulting in blockage of the discharge port and affecting the downstream feeding equipment and filling effect.
An anti-blocking device is designed, including installing a bearing mounting assembly and multiple spiral stirring shafts in the middle of the gangue buffer chamber, using the agitation power to destroy the bridge and arching phenomenon of the discharge port, and a ring-shaped compressed air fluidization system is set on the inclined wall of the cone section of the discharge port to generate compressed air air flow to make the gangue particles loose and reduce the flow friction resistance.
It effectively destroys the bridge and arching phenomenon of the discharge port of the gangue buffer bin, prevents blockage, ensures that the gangue particles are easy to flow loosely, and solves the problem that the gangue buffer bin under the coal mine cannot discharge smoothly, continuously and stably.
Smart Images
Figure CN222555628U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an anti-blocking device for a gangue buffer bin in an underground coal mine, belonging to the technical field of coal mine equipment. Background Art
[0002] When continuous mining and continuous filling technology is adopted in coal mines, a gangue buffer bin is usually set up in the coal mine. Its function is to buffer the gangue after ultra-fine crushing by the ground system. In mines with deep coal seams, the drop of gangue entering the buffer bin is large, and the dust generated underground is very large. Therefore, spray dust suppression facilities are set at the feeding port of the gangue buffer bin. When continuous mining and continuous filling technology is adopted, the particle size of the gangue buffered in the gangue buffer is usually less than 20mm. Due to fog, the surface of the gangue in the buffer bin contains a large amount of external water, which often causes bridging, arching, and sticking to the bin wall at the discharge port of the buffer bin. The discharge port of the gangue buffer bin is often blocked, and the discharge is not smooth, which will cause a large fluctuation of the gangue on the feeding equipment and conveying equipment downstream of the bin, and then lead to an unstable ratio when mixed with the slurry, which seriously affects the final filling effect. When the gangue buffer bin cannot discharge normally, workers are often required to clear the blockage, which seriously affects the normal operation of the filling and mining system. At present, the gangue buffer bins in coal mines in China that carry out filling and mining business have not adopted the mature anti-blocking devices currently on the market. The main reason is that the underground environment is special and the inspection and installation and maintenance conditions are limited. Utility Model Content
[0003] In order to solve the technical problems existing in the prior art, the utility model provides an anti-blocking device for a gangue buffer bin in an underground coal mine, which utilizes stirring force to destroy the bridging and arching phenomena of a gangue buffer bin discharge port to prevent blockage.
[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is a device for preventing blocking of gangue buffer bin in underground coal mines, comprising a gangue buffer bin, a bearing mounting seat assembly is installed in the middle of the gangue buffer bin, the bottom of the bearing mounting seat assembly is fixed to the inner wall of the gangue buffer bin through a support rod, and a plurality of spiral stirring shafts are evenly installed in the gangue buffer bin, one end of the spiral stirring shaft is installed on the bearing mounting seat assembly, and the other end is installed on the inner wall of the gangue buffer bin through a bearing, a motor fixing bracket is installed on the outside of the gangue buffer bin, a drive motor is installed on the motor fixing bracket, and the drive motor is connected to the spiral stirring shaft.
[0005] Preferably, the bearing mounting seat assembly includes a mounting groove and a material dividing cone protective cover installed on the top of the mounting groove, and a plurality of bearing seats are evenly installed in the mounting groove. The number of the bearing seats corresponds one-to-one to the spiral stirring shaft, and the spiral stirring shaft is installed on the bearing seat through a bearing.
[0006] Preferably, it further comprises a plurality of annular compressed air fluidization systems installed on the inner wall of the gangue buffer bin, wherein the annular compressed air fluidization systems are located below the spiral stirring shaft and are arranged in sequence from top to bottom along the inner wall of the gangue buffer bin;
[0007] The annular compressed air fluidization system includes an annular right-angle fixed plate installed on the inner wall of the gangue buffer bin and a blowing pipe installed in the annular right-angle fixed plate. A plurality of blowing holes are arranged at the bottom of the blowing pipe. The blowing pipe is connected to a compressed air supply pipe. The compressed air supply pipe is located outside the gangue buffer bin, and a control valve is installed on the compressed air supply pipe.
[0008] Compared with the prior art, the utility model has the following technical effects: the utility model utilizes a specially designed bearing seat and protective cover to fix the center of the bin, and utilizes the stirring force generated by the horizontal short-axis spiral to destroy the bridge and arch of the discharge port of the gangue buffer bin, and utilizes the compressed air airflow generated by the annular compressed air fluidization system arranged on the inclined wall of the cone section near the outlet of the buffer bin to loosen the gangue particles in the gangue buffer bin close to the discharge port, making the gangue particles easy to flow loosely, reducing the flow friction resistance between the particles, and making the gangue particles adhered to the wall surface of the cone section of the discharge port in a fluidized state, so that they can fall more smoothly into the downstream feeding equipment or conveying equipment, thereby solving the problem that the gangue buffer bin in the coal mine cannot discharge smoothly, continuously and stably. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a structural schematic diagram of the utility model.
[0010] Figure 2 for Figure 1 AA section view in.
[0011] Figure 3 for Figure 1 BB section view in. DETAILED DESCRIPTION
[0012] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0013] like Figures 1 to 3As shown, a device for preventing blocking of a gangue buffer bin in an underground coal mine comprises a gangue buffer bin 1, a bearing mounting seat assembly 2 is installed in the middle of the gangue buffer bin 1, and the bottom of the bearing mounting seat assembly 2 is fixed to the inner wall of the gangue buffer bin 1 through a support rod. A plurality of spiral stirring shafts 3 are evenly installed in the gangue buffer bin 1, one end of the spiral stirring shaft 3 is installed on the bearing mounting seat assembly 2, and the other end is installed on the inner wall of the gangue buffer bin 1 through a bearing. A motor fixing bracket 4 is installed on the outside of the gangue buffer bin 1, and a driving motor 5 is installed on the motor fixing bracket 4, and the driving motor 5 is connected to the spiral stirring shaft 3.
[0014] Among them, the bearing mounting seat assembly 2 includes a mounting groove 6 and a material dividing cone protective cover 7 installed on the top of the mounting groove 6. A plurality of bearing seats 8 are evenly installed in the mounting groove 6. The number of bearing seats 8 corresponds one-to-one to the spiral stirring shaft 3. The spiral stirring shaft 3 is installed on the bearing seat 8 through a bearing.
[0015] In the utility model, the spiral stirring shaft 3 is installed in the gangue buffer bin about 2 meters away from the discharge port. The spiral stirring shaft adopts the installation form of direct connection with the drive motor. The main consideration is that the pressure in the gangue buffer bin is relatively large. The direct connection can improve the efficiency of the transmission. In order to facilitate the later maintenance and replacement of the motor, the drive motor is evenly fixed on the circumference of the gangue buffer bin, so that the force is more uniform during the operation of the device. The spiral stirring shaft 3 is divided into 3 groups. Considering that the horizontal short-axis loose spiral needs to overcome different friction and resistance between different gangue particles, sufficient transmission margin is reserved. The 3 groups of drives can be opened at the same time or 2 groups or 1 group can be opened separately. The drive motor adopts a variable frequency motor. The bearing mounting seat assembly 2 is installed in the center of the gangue buffer bin to fix the bearing seat. The mounting groove 6 adopts a cylindrical structure. The three bearing seats are evenly distributed on the circumference of the cylindrical barrel. A certain gap is left in the design. The material dividing cone protective cover adopts a conical shell structure and is made of wear-resistant alloy steel plate. Such a structure is conducive to reducing the vertical pressure in the bin on the bearing seat and protective cover borne by the gangue particles in the bin, and can also effectively protect the upper part of the central transmission device. In addition, three round tube support rods with the same angle as the spiral arrangement are provided at the bottom of the mounting groove, so that the bearing base is installed in the bin more firmly and stably to avoid deformation caused by long-term use. The spiral stirring shaft adopts a design of three short-axis spirals and is arranged in the same horizontal plane. This design method is more conducive to the horizontal spiral shaft not being easily bent and deformed due to the vertical pressure in the gangue buffer bin. When the three groups of spirals are running at the same time, the gangue materials in the outlet section of the gangue buffer bin can be quickly loosened to achieve the purpose of breaking the arch and destroying the bridge.
[0016] like Figure 1 , Figure 3As shown, a plurality of annular compressed air fluidizing systems 9 are also installed on the inner wall of the gangue buffer bin 1. The annular compressed air fluidizing systems 9 are located below the spiral stirring shaft and are arranged in sequence from top to bottom along the inner wall of the gangue buffer bin 1; the annular compressed air fluidizing system 9 includes an annular right-angle fixing plate 10 installed on the inner wall of the gangue buffer bin 1 and a blowing pipe 11 installed in the annular right-angle fixing plate, a plurality of blowing holes are arranged at the bottom of the blowing pipe 11, the blowing pipe 11 is connected to a compressed air supply pipe 12, the compressed air supply pipe 12 is located outside the gangue buffer bin 1, and a control valve 13 is installed on the compressed air supply pipe 12.
[0017] The annular compressed air fluidization system has three groups of annular compressed air pipes evenly arranged on the inclined section of the silo wall below the short-axis loose spiral. Considering the use conditions of the compressed air pipe in the gangue buffer bin, the blowing holes on the compressed air pipe are easily blocked by gangue particles and dust. Therefore, the angle steel protection plate design is adopted on the compressed air pipe. In addition, the blowing holes on the compressed air pipe are arranged along the inner wall of the bin, with large aperture openings. A plurality of electromagnetic regulating valves are also installed on the compressed air pipe outside the bin wall. During the operation of the anti-blocking device, the compressed air flow rate on each group of annular compressed air pipes can be adjusted at any time to adjust the fluidization state of the gangue particles on the bin wall. When the discharge is not smooth, the compressed air blowing amount can be increased. The purpose of setting the compressed air electromagnetic regulating valve is to learn from other industries to adjust the instantaneous flow rate of compressed air, which is conducive to making the fluidization state of gangue particles within a controllable range. When the discharge is smooth, the compressed air blowing amount is reduced. Such a design is conducive to reducing dust at the discharge port of the gangue buffer bin.
[0018] In addition, the spiral conveying shaft and the annular compressed air fluidizing system can be automatically controlled. By controlling the number of openings of the horizontal short-axis loosening spiral and adjusting the rotation speed, the flow rate of compressed air in the annular compressed air fluidizing system can be controlled so that it can be interlocked with the gangue quantity metering parameters and gangue flow parameters on the conveying equipment downstream of the gangue buffer bin. According to the production operation data, the anti-blocking device can achieve the best operating state to ensure that the discharge port of the gangue buffer bin can discharge materials stably, continuously and smoothly.
[0019] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the scope of the present invention.
Claims
1. A device for preventing blocking of gangue buffer bin in underground coal mines, comprising a gangue buffer bin, characterized in that: A bearing mounting seat assembly is installed in the middle of the gangue buffer bin, and the bottom of the bearing mounting seat assembly is fixed to the inner wall of the gangue buffer bin through a support rod. A plurality of spiral stirring shafts are evenly installed in the gangue buffer bin, one end of the spiral stirring shaft is installed on the bearing mounting seat assembly, and the other end is installed on the inner wall of the gangue buffer bin through a bearing. A motor fixing bracket is installed outside the gangue buffer bin, and a driving motor is installed on the motor fixing bracket, and the driving motor is connected to the spiral stirring shaft.
2. The anti-blocking device for gangue buffer bin in coal mine according to claim 1 is characterized in that: The bearing mounting seat assembly includes a mounting groove and a material dividing cone protective cover installed on the top of the mounting groove. A plurality of bearing seats are evenly installed in the mounting groove. The number of the bearing seats corresponds one-to-one to the spiral stirring shaft. The spiral stirring shaft is installed on the bearing seat through a bearing.
3. The anti-blocking device for gangue buffer bin in coal mine according to claim 1 is characterized in that: It also includes a plurality of annular compressed air fluidization systems installed on the inner wall of the gangue buffer bin, wherein the annular compressed air fluidization systems are located below the spiral stirring shaft and are arranged in sequence from top to bottom along the inner wall of the gangue buffer bin; The annular compressed air fluidization system includes an annular right-angle fixed plate installed on the inner wall of the gangue buffer bin and a blowing pipe installed in the annular right-angle fixed plate. A plurality of blowing holes are arranged at the bottom of the blowing pipe. The blowing pipe is connected to a compressed air supply pipe. The compressed air supply pipe is located outside the gangue buffer bin, and a control valve is installed on the compressed air supply pipe.