An intelligent grouting station for underground coal mines

Abstract

The present invention discloses an intelligent grouting station for underground coal mines, comprising a mine explosion-proof control cabinet, a dry powder spiral conveying system, a pulping system, a slurry storage system and a grouting system. The mine explosion-proof control cabinet, the dry powder spiral conveying system, the pulping system, the slurry storage system and the grouting system are arranged in a straight line. The dry powder spiral conveying system is connected to the pulping system and conveys dry powder to the pulping system. The pulping system is connected to the slurry storage system and conveys finished slurry to the slurry storage system. The grouting system is connected to the slurry storage system and sucks out the slurry and injects it into the working surface. The dry powder spiral conveying system, the pulping system, the slurry storage system and the grouting system are all electrically connected to the mine explosion-proof control cabinet. The present invention has a high degree of automation by setting an intelligent measurement system and an electric control system, and the slurry is accurately proportioned, the slurry is of better quality, the preparation speed is fast, the manual operation is reduced, the labor intensity of the staff is reduced, and the work efficiency is improved; the modular design of the whole machine is more convenient for assembly and transportation in a narrow environment.

Description

Technical Field

[0001] The invention relates to the technical field of automatic grouting, and in particular to an intelligent grouting station for underground coal mines. Background Art

[0002] At present, the pulping method commonly used in China is to make pulp on the mine, add additives and mix it manually in a barrel after transporting it to the mine. However, the original method of manual mixing in a barrel underground faces problems such as high labor intensity, difficult to control the water-cement ratio and discontinuous pulping. With the popularization of grouting technology, in order to meet the grouting process and the gradual increase in the displacement of the grouting pump, the market urgently needs intelligent pulping equipment with high automation degree of pulping and storage, high efficiency, reduced labor intensity, fast pulping speed, and uniform slurry mixing. Summary of the invention

[0003] The purpose of the present invention is to provide an intelligent grouting station for underground coal mines to solve the problems of low efficiency, high labor intensity and uncontrollable slurry quality of manual bucket mixing and stirring underground.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The present invention discloses an intelligent grouting station for underground coal mines, comprising a mining explosion-proof control cabinet, a dry powder screw conveying system, a pulping system, a slurry storage system and a grouting system. The mining explosion-proof control cabinet, the dry powder screw conveying system, the pulping system, the slurry storage system and the grouting system are arranged in a straight line. The dry powder screw conveying system is connected with the pulping system and conveys dry powder to the pulping system. The pulping system is connected with the slurry storage system and conveys finished slurry to the slurry storage system. The grouting system is connected with the slurry storage system and sucks out the slurry and injects it into a working surface. The dry powder screw conveying system, the pulping system, the slurry storage system and the grouting system are all electrically connected to the mining explosion-proof control cabinet.

[0006] Furthermore, the pulping system includes a first high-speed pulping machine and a second high-speed pulping machine arranged in parallel, a pulp inlet pipeline is provided on one side of the first high-speed pulping machine and the second high-speed pulping machine, a pressure reducing valve and an electromagnetic flowmeter are provided on the pulp inlet pipeline, a ninth electric butterfly valve and an eighth electric butterfly valve are provided at the connection points of the pulp inlet pipeline with the first high-speed pulping machine and the second high-speed pulping machine, respectively, the pulp discharge ports of the first high-speed pulping machine and the second high-speed pulping machine are connected in series through a pulp discharge high-pressure hose, the other end of the pulp discharge high-pressure hose is connected to the pulp storage system through a pulp discharge pipeline, a first weighing module and a second weighing module are provided at the bottom of the first high-speed pulping machine and the second high-speed pulping machine, respectively, a first bottom bracket and a second bottom bracket are provided below the first weighing module and the second weighing module, a first pulp inlet pipeline bracket and a second pulp inlet pipeline bracket are provided below the pulp inlet pipeline, and the bottom ends of the first pulp inlet pipeline bracket and the second pulp inlet pipeline bracket are fixed on the second bottom bracket.

[0007] Furthermore, a reflux pipeline is connected to the pipeline between the pressure reducing valve and the electromagnetic flowmeter, and a seventh electric butterfly valve is arranged on the reflux pipeline.

[0008] Furthermore, a third electric butterfly valve is arranged on the slurry circulation pipeline of the first high-speed pulping machine, and a fourth electric butterfly valve is arranged at the slurry discharge port of the first high-speed pulping machine; a fifth electric butterfly valve is arranged on the slurry circulation pipeline of the second high-speed pulping machine, and a sixth electric butterfly valve is arranged at the slurry discharge port of the second high-speed pulping machine.

[0009] Furthermore, the slurry storage system includes a slurry storage tank, a slurry tank bottom bracket is provided at the bottom of the slurry storage tank, a slurry suction groove is provided inside the slurry storage tank, a first stirring motor and a second stirring motor are installed on the upper part of the slurry storage tank, the output shafts of the first stirring motor and the second stirring motor are both connected with a reducer, the reducer is installed on the channel steel bracket, the working end of the reducer is connected to a stirring shaft, a plurality of stirring blades are evenly welded on the outer side of the stirring shaft, and a liquid level sensor is also provided on the upper part of the slurry storage tank.

[0010] Furthermore, the dry powder screw conveying system includes a dry powder storage tank, a first screw conveyor, a second screw conveyor and a third screw conveyor. The first screw conveyor is arranged below the dry powder storage tank, the second screw conveyor is vertically connected to one side of the first screw conveyor, the third screw conveyor is vertically connected above the second screw conveyor, and two conveying outlets are arranged at the bottom of the third screw conveyor, and the two conveying outlets are respectively connected to the first high-speed pulping machine and the second high-speed pulping machine.

[0011] Furthermore, a first electric butterfly valve is provided at the delivery outlet communicated with the first high-speed pulping machine, and a second electric butterfly valve is provided at the delivery outlet communicated with the second high-speed pulping machine.

[0012] Furthermore, a dry powder reserve tank bottom bracket is provided below the dry powder reserve tank, and a first support rod and a second support rod are provided below the third screw conveyor, and the bottom ends of the first support rod and the second support rod are both fixed on the first bottom bracket.

[0013] Furthermore, the grouting system includes a grouting pump, and the grouting pump is connected to the grout suction groove.

[0014] Furthermore, the number of the grouting pumps is set to two.

[0015] Compared with the prior art, the beneficial technical effects of the present invention are:

[0016] The present invention discloses an intelligent grouting station for underground coal mines, comprising a mine explosion-proof control cabinet, a dry powder screw conveying system, a pulping system, a slurry storage system and a grouting system. The mine explosion-proof control cabinet, the dry powder screw conveying system, the pulping system, the slurry storage system and the grouting system are arranged in a straight line. The dry powder screw conveying system is connected with the pulping system and conveys dry powder to the pulping system. The pulping system is connected with the slurry storage system and conveys finished slurry to the slurry storage system. The grouting system is connected with the slurry storage system and sucks out the slurry and injects it into the working surface. The dry powder screw conveying system, the pulping system, the slurry storage system The system and the grouting system are electrically connected to the mining explosion-proof control cabinet; after the three media pass through the intelligent pulping station, the present invention is controlled by PLC, and automatically measures and calculates to automatically proportion cement dry powder. The high-speed pulping machine makes the finished slurry and then transports it to the slurry storage tank, and then the grouting system injects the slurry into the working face; through the intelligent measurement system and the electronic control system, the slurry produced by the present invention has accurate proportions, better slurry quality, fast preparation speed, high degree of automation, reduced manual operation and higher efficiency; the modular design of the whole machine is more convenient for assembly and transportation in narrow environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the structure of an intelligent grouting station for underground coal mines according to the present invention;

[0019] Figure 2 This is a schematic diagram of the stirring structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the explosion-proof control cabinet for mining of the present invention.

[0021] Explanation of the reference numerals: 1. Mining explosion-proof control cabinet; 2. Dry powder screw conveying system; 3. Dry powder storage tank; 4. First screw conveyor; 5. Bottom bracket of dry powder storage tank; 6. Second screw conveyor; 7. Third screw conveyor; 8. First electric butterfly valve; 9. Second electric butterfly valve; 10. First support rod; 11. Second support rod; 12. First high-speed pulping machine; 13. Second high-speed pulping machine; 14. First bottom bracket; 15. Second bottom bracket; 16. First weighing module; 17. Second weighing module; 18. Third electric butterfly valve; 19. Fourth electric butterfly valve; 20. Fifth electric butterfly valve ; 21. The sixth electric butterfly valve; 22. The slurry inlet pipeline; 23. The pressure reducing valve; 24. The seventh electric butterfly valve; 25. The electromagnetic flowmeter; 26. The eighth electric butterfly valve; 27. The ninth electric butterfly valve; 28. The slurry discharge high-pressure hose; 29. ​​The slurry discharge pipeline; 30. The first slurry inlet pipeline bracket; 31. The second slurry inlet pipeline bracket; 32. The slurry storage tank; 33. The bottom bracket of the slurry storage tank; 34. The first stirring motor; 35. The second stirring motor; 36. The liquid level sensor; 37. The slurry suction trough; 38. The grouting pump; 39. The return pipeline; 40. The reducer; 41. The stirring shaft; 42. The stirring blade; 43. The channel steel bracket. DETAILED DESCRIPTION

[0022] like Figure 1-3 As shown, an intelligent grouting station for underground coal mines includes a mining explosion-proof control cabinet 1, a dry powder screw conveying system 2, a pulping system, a slurry storage system and a grouting system. The mining explosion-proof control cabinet 1, the dry powder screw conveying system 2, the pulping system, the slurry storage system and the grouting system are arranged in a straight line. The dry powder screw conveying system 2 is connected to the pulping system and conveys dry powder to the pulping system. The pulping system is connected to the slurry storage system and conveys finished slurry to the slurry storage system. The grouting system is connected to the slurry storage system and sucks out the slurry and injects it into the working surface. The dry powder screw conveying system 2, the pulping system, the slurry storage system and the grouting system are arranged in a straight line. The grouting systems are all electrically connected to the mining explosion-proof control cabinet 1; the present invention passes three kinds of media through the intelligent pulping station, which is controlled by PLC, and automatically measures and calculates to automatically proportion cement dry powder. The finished slurry is made by the high-speed pulping machine and then transported to the slurry storage tank, and then the slurry is injected into the working face by the grouting system; the present invention uses an intelligent measurement system and an electronic control system to ensure that the slurry is accurately proportioned, the slurry quality is better, the preparation speed is fast, the degree of automation is high, manual operation is reduced, and the efficiency is higher; the whole machine is modularly designed, and the mining explosion-proof control cabinet 1, the dry powder spiral conveying system 2, the pulping system, the slurry storage system and the grouting system are arranged in a straight line, which is more convenient for assembly and transportation in a narrow environment.

[0023] Specifically, the pulping system includes a first high-speed pulping machine 12 and a second high-speed pulping machine 13 arranged in parallel, a pulp inlet pipeline 22 is provided on one side of the first high-speed pulping machine 12 and the second high-speed pulping machine 13, a pressure reducing valve 23 and an electromagnetic flowmeter 25 are provided on the pulp inlet pipeline 22, and a ninth electric butterfly valve 27 and an eighth electric butterfly valve 26 are provided at the connection points between the pulp inlet pipeline 22 and the first high-speed pulping machine 12 and the second high-speed pulping machine 13, respectively. The pulp discharge ports of the first high-speed pulping machine 12 and the second high-speed pulping machine 13 are connected in series through a pulp discharge high-pressure hose 28, and the other end of the pulp discharge high-pressure hose 28 is connected to the pulp storage system through a pulp discharge pipeline 29, and a first weighing module 16 and a second weighing module 17 are provided at the bottom of the first high-speed pulping machine 12 and the second high-speed pulping machine 13, respectively. The first bottom bracket 14 and the second bottom bracket 15 are respectively arranged below the first weighing module 16 and the second weighing module 17, and the first slurry inlet pipeline bracket 30 and the second slurry inlet pipeline bracket 31 are arranged below the slurry inlet pipeline 22, and the bottom ends of the first slurry inlet pipeline bracket 30 and the second slurry inlet pipeline bracket 31 are fixed on the second bottom bracket 15; the first high-speed pulping machine 12 and the second high-speed pulping machine 13 can work simultaneously or separately, and can be selected according to needs, with strong adaptability; the quality of the actual conveying mud / water and dry powder can be judged by the first weighing module 16 and the second weighing module 17, and the stop of the corresponding conveying electric butterfly valve can be controlled at the same time. Through automatic measurement and calculation, the cement dry powder is automatically proportioned, the proportion of the slurry is more accurate, the quality of the slurry is better, the preparation speed is fast, and the degree of automation is improved.

[0024] A return pipeline 39 is connected to the pipeline between the pressure reducing valve 23 and the electromagnetic flowmeter 25, and a seventh electric butterfly valve 24 is provided on the return pipeline 39; when there is a slurry preparation process in the barrels of the first high-speed pulping machine 12 and the second high-speed pulping machine 13, the seventh electric butterfly valve 24 on the return pipeline 39 is opened, and the slurry transported from the well is input into the return pipeline 39 to reduce the impact on the equipment.

[0025] A third electric butterfly valve 18 is provided on the slurry circulation pipeline of the first high-speed pulping machine 12, and a fourth electric butterfly valve 19 is provided at the slurry discharge port of the first high-speed pulping machine 12; a fifth electric butterfly valve 20 is provided on the slurry circulation pipeline of the second high-speed pulping machine 13, and a sixth electric butterfly valve 21 is provided at the slurry discharge port of the second high-speed pulping machine 13; the first high-speed pulping machine 12 and the second high-speed pulping machine 13 both use the high-speed vortex pulping machine recorded in the patent with application number 201610721314.X, and the specific structure is not repeated here. Through the slurry vortex circulation pipelines of the first high-speed pulping machine 12 and the second high-speed pulping machine 13, the slurry is evenly mixed during the vortex circulation process, thereby completing the preparation of the slurry.

[0026] The slurry storage system includes a slurry storage tank 32, a slurry storage tank bottom bracket 33 is provided at the bottom of the slurry storage tank 32, a slurry suction groove 37 is provided inside the slurry storage tank 32, and a first stirring motor 34 and a second stirring motor 35 are installed on the upper part of the slurry storage tank 32. The output shafts of the first stirring motor 34 and the second stirring motor 35 are both connected with a reducer 40, and the reducer 40 is installed on a channel steel bracket 43 to ensure the stability of the stirring motor. The working end of the reducer 40 is connected to a stirring shaft 41, and a plurality of stirring blades 42 are evenly welded on the outer side of the stirring shaft 41. A liquid level sensor 36 is also provided on the upper part of the slurry storage tank 32; stirring can prevent slurry from settling, and the maximum slurry reserve is controlled by the liquid level sensor.

[0027] The dry powder screw conveying system 2 includes a dry powder reserve tank 3, a first screw conveyor 4, a second screw conveyor 6 and a third screw conveyor 7. The first screw conveyor 4 is arranged below the dry powder reserve tank 3, the second screw conveyor 6 is vertically connected to one side of the first screw conveyor 4, the third screw conveyor 7 is vertically connected above the second screw conveyor 6, and two conveying outlets are arranged at the bottom of the third screw conveyor 7, and the two conveying outlets are respectively connected to the first high-speed pulping machine 12 and the second high-speed pulping machine 13; a new arrangement form is adopted between the first screw conveyor 4, the second screw conveyor 6 and the third screw conveyor 7, which has a compact structure, a reasonable layout, occupies less space, improves space utilization, and is more convenient for assembly and transportation in a narrow environment.

[0028] A first electric butterfly valve 8 is provided at the delivery outlet connected to the first high-speed pulping machine 12, and a second electric butterfly valve 9 is provided at the delivery outlet connected to the second high-speed pulping machine 13; by providing the first electric butterfly valve 8 and the second electric butterfly valve 9, the dry powder delivery amount of the first high-speed pulping machine 12 and the second high-speed pulping machine 13 can be controlled respectively, thereby realizing automatic control and improving the accuracy of the ratio.

[0029] A dry powder reserve tank bottom bracket 5 is arranged below the dry powder reserve tank 3, and a first support rod 10 and a second support rod 11 are arranged below the third screw conveyor 7. The bottom ends of the first support rod 10 and the second support rod 11 are fixed on the first bottom bracket 14; the third screw conveyor 7 is fixed by the first support rod 10 and the second support rod 11 to increase the stability of the equipment.

[0030] The grouting system includes a grouting pump 38 , and the grouting pump 38 is connected to the grout suction groove 37 .

[0031] The number of the grouting pumps 38 is set to two.

[0032] The use process of the present invention is as follows:

[0033] Step 1: mud / water enters from the slurry inlet pipeline 22. After the pressure is reduced by the pressure reducing valve 23, the PLC controller in the mining explosion-proof control cabinet 1 opens the ninth electric butterfly valve 27 and the eighth electric butterfly valve 26 alternately to send the mud or water to the first high-speed pulping machine 12 and the second high-speed pulping machine 13 respectively. The data measured by the electromagnetic flowmeter 25 during the mud / water passing through the slurry inlet pipeline 22 is transmitted to the PLC controller for data processing. The processing result can control the ratio requirement of the mud / water and dry powder delivered to the first high-speed pulping machine 12 and the second high-speed pulping machine 13. The delivery is stopped after the flow rate of the mud / water reaches the set flow rate of the high-speed pulping machine system; Step 2: According to the calculated ratio requirement, the dry powder spiral conveying system 2 starts to alternately convey the dry powder to the first high-speed pulping machine 12 and the second high-speed pulping machine 13, and at the same time The first weighing module 16 and the second weighing module 17 at the bottom of the first high-speed pulping machine 12 and the second high-speed pulping machine 13 carry out incremental weighing of dry powder, and stop conveying dry powder after reaching the calculated mass of cement powder to be conveyed; Step three, after conveying mud / water and dry powder to reach the calculation result of the PLC controller, the first high-speed pulping machine 12 and the second high-speed pulping machine 13 start pulping through the internal circulation vortex; Step four, after pulping is completed, the finished slurry is alternately conveyed to the slurry storage tank 32 through the slurry discharge port, the first stirring motor 34 and the second stirring motor 35 start stirring, the stirring shaft 41 and a plurality of stirring blades 42 rotate to prevent the slurry from settling, and at the same time, the liquid level sensor 36 installed on the upper part of the slurry storage tank 32 controls the maximum slurry storage volume; Step five, the grouting pump 38 sucks the slurry out of the slurry suction groove 37 in the slurry storage tank 32 and injects it into the working surface.

[0034] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An intelligent grouting station for underground coal mines, characterized in that: It includes a mining explosion-proof control cabinet, a dry powder screw conveying system, a pulping system, a slurry storage system and a grouting system. The mining explosion-proof control cabinet, the dry powder screw conveying system, the pulping system, the slurry storage system and the grouting system are arranged in a straight line. The dry powder screw conveying system is connected with the pulping system and conveys dry powder to the pulping system. The pulping system is connected with the slurry storage system and conveys finished slurry to the slurry storage system. The grouting system is connected with the slurry storage system and sucks out the slurry and injects it into the working face. The dry powder screw conveying system, the pulping system, the slurry storage system and the grouting system are all electrically connected to the mining explosion-proof control cabinet. The pulping system comprises a first high-speed pulping machine and a second high-speed pulping machine arranged in parallel, a pulp inlet pipeline is provided on one side of the first high-speed pulping machine and the second high-speed pulping machine, a pressure reducing valve and an electromagnetic flowmeter are provided on the pulp inlet pipeline, a ninth electric butterfly valve and an eighth electric butterfly valve are provided at the connection points of the pulp inlet pipeline with the first high-speed pulping machine and the second high-speed pulping machine, respectively, the pulp discharge ports of the first high-speed pulping machine and the second high-speed pulping machine are connected in series through a pulp discharge high-pressure hose, the other end of the pulp discharge high-pressure hose is connected to the pulp storage system through a pulp discharge pipeline, a first weighing module and a second weighing module are provided at the bottom of the first high-speed pulping machine and the second high-speed pulping machine, respectively, a first bottom bracket and a second bottom bracket are provided below the first weighing module and the second weighing module, a first pulp inlet pipeline bracket and a second pulp inlet pipeline bracket are provided below the pulp inlet pipeline, and the bottom ends of the first pulp inlet pipeline bracket and the second pulp inlet pipeline bracket are fixed on the second bottom bracket; The slurry storage system comprises a slurry storage tank, a slurry storage tank bottom bracket is arranged at the bottom of the slurry storage tank, a slurry suction groove is arranged inside the slurry storage tank, a first stirring motor and a second stirring motor are installed on the upper part of the slurry storage tank, and a reducer is connected to the output shafts of the first stirring motor and the second stirring motor, and the reducer is installed on the channel steel bracket, and a stirring shaft is connected to the working end of the reducer, and a plurality of stirring blades are uniformly welded on the outer side of the stirring shaft, and a liquid level sensor is also arranged on the upper part of the slurry storage tank; The dry powder screw conveying system includes a dry powder storage tank, a first screw conveyor, a second screw conveyor and a third screw conveyor. The first screw conveyor is arranged below the dry powder storage tank, the second screw conveyor is vertically connected to one side of the first screw conveyor, and the third screw conveyor is vertically connected above the second screw conveyor. Two conveying outlets are arranged at the bottom of the third screw conveyor, and the two conveying outlets are respectively connected to the first high-speed pulping machine and the second high-speed pulping machine.

2. The intelligent grouting station for underground coal mine according to claim 1, characterized in that: A reflux pipeline is connected to the pipeline between the pressure reducing valve and the electromagnetic flowmeter, and a seventh electric butterfly valve is arranged on the reflux pipeline.

3. The intelligent grouting station for underground coal mine according to claim 1, characterized in that: A third electric butterfly valve is arranged on the slurry circulation pipeline of the first high-speed pulping machine, and a fourth electric butterfly valve is arranged at the slurry discharge port of the first high-speed pulping machine; a fifth electric butterfly valve is arranged on the slurry circulation pipeline of the second high-speed pulping machine, and a sixth electric butterfly valve is arranged at the slurry discharge port of the second high-speed pulping machine.

4. The intelligent grouting station for underground coal mine according to claim 1, characterized in that: A first electric butterfly valve is provided at the delivery outlet communicated with the first high-speed pulping machine, and a second electric butterfly valve is provided at the delivery outlet communicated with the second high-speed pulping machine.

5. The intelligent grouting station for underground coal mine according to claim 1, characterized in that: A dry powder storage tank bottom bracket is arranged below the dry powder storage tank, and a first support rod and a second support rod are arranged below the third screw conveyor, and the bottom ends of the first support rod and the second support rod are both fixed on the first bottom bracket.

6. The intelligent grouting station for underground coal mine according to claim 1, characterized in that: The grouting system comprises a grouting pump, and the grouting pump is communicated with the grout suction groove.

7. The intelligent grouting station for underground coal mine according to claim 6, characterized in that: The number of the grouting pumps is set to two.

Images