Device for producing cement paste through compressed air in underground coal mine

Abstract

The utility model discloses a coal mine underground compressed air cement paste device which comprises a cement transportation bin, a paste storage barrel air inlet ball valve and a pneumatic stirring slurrying machine, and the air inlet ball valve is connected with a first air supply pipeline and a second air supply pipeline. The first air supply pipeline is connected to an air inlet of the cement transportation bin, and a discharge port of the cement transportation bin is connected to a stirring bin body of the pneumatic stirring pulping machine through a discharge pipe; and the second air supply pipeline is connected to a pneumatic motor of the pneumatic stirring pulping machine. The first air supply pipeline connects the cement transportation bin with the stirring bin body of the pneumatic stirring pulping machine, and cement can be blown into the stirring machine through underground compressed air to be stirred; the second air supply pipe is connected to the pneumatic stirring slurrying machine and is a pneumatic motor, a power source can be provided for the pneumatic motor through compressed air, investment of electrical equipment is reduced, potential safety hazards are reduced for a high-gas mine, pipeline closed-loop slurrying is achieved, the dust raising phenomenon of manual slurrying is avoided, and an underground environment system is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of underground coal mine pulping equipment, in particular to an underground coal mine compressed air cement pulping device. Background Art

[0002] Grouting engineering technology is to inject different types of slurries into the pores and cracks of coal rock mass by applying a certain pressure. As the grouting pressure increases, the slurry gradually fills, penetrates and splits the coal rock mass, and drives out the moisture, air, etc. in it. Finally, as the slurry solidifies, the broken coal rock mass forms a complete whole, the stability is improved, and the physical and mechanical properties are improved, achieving the purpose of reinforcement and water blocking.

[0003] With the continuous reduction of shallow coal resources, the development of deep resources has become inevitable. In this process, complex strata such as faults and broken zones affect various projects such as mining, excavation, repair, and drilling. Grouting reinforcement is generally used to solve the above problems at home and abroad. At present, underground grouting equipment is mainly mixers and grouting pumps, but the existing equipment and technology can no longer meet the needs of grouting operations. There are mainly the following deficiencies:

[0004] 1. Auxiliary work such as feeding, pulping and cleaning are all done manually, which has high labor intensity, low labor efficiency and high safety risks.

[0005] 2. The parameters of slurry making and grouting are manually adjusted and recorded. The grouting operation is not standardized and it is difficult to precisely control the quality.

[0006] 3. The manual handling of cement and slurry production process generates a lot of dust, which causes pollution to the working environment and nearby air. Utility Model Content

[0007] The technical problem to be solved by the utility model is: how to solve the problem of low efficiency in pulping and grouting in underground coal mines.

[0008] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0009] A compressed air cement slurry device for underground coal mines, comprising a cement transport bin and a slurry storage barrel located at one side of the cement transport bin, and also comprising an inlet ball valve and a pneumatic stirring slurry making machine located at one side of the cement transport bin, wherein the inlet ball valve is connected to a first air supply pipeline and a second air supply pipeline;

[0010] The first air supply pipeline is connected to the air inlet of the cement transport bin, and the discharge port of the cement transport bin is connected to the mixing bin body of the pneumatic mixing pulping machine through the discharge pipe;

[0011] The second air supply pipeline is connected to the pneumatic motor of the pneumatic stirring pulping machine.

[0012] The present application sets a first air supply pipeline and a second air supply pipeline. The first air supply pipeline connects the cement transport bin and the mixing bin body of the pneumatic mixing pulping machine, and can blow the cement into the mixer for mixing through the compressed air underground; the second air supply pipeline is connected to the pneumatic mixing pulping machine as an air motor, and can provide a power source for the air motor through compressed air, thereby reducing the investment in electrical equipment, reducing the labor workload of workers, and improving the pulping efficiency. For high-gas mines, safety hazards are reduced, and the pipeline closed-loop pulping solves the problem of dust from artificial pulping, which is beneficial to the underground environmental system.

[0013] As a further solution of the utility model: the cement transport bin is installed on the first storage vehicle.

[0014] As a further solution of the utility model: the pulp storage barrel and the pneumatic stirring pulping machine are installed on the second storage vehicle, and the bottom liquid outlet of the pneumatic stirring pulping machine is connected to the pulp storage barrel through a pulp discharge pipeline.

[0015] As a further solution of the utility model: a control valve is provided on the slurry discharge pipeline, and a pressure gauge is also provided on the slurry discharge pipeline.

[0016] As a further solution of the utility model: the outer side of the pneumatic stirring pulping machine is installed on the second storage vehicle through a support rod.

[0017] As a further solution of the utility model: the pneumatic stirring pulping machine is arranged higher than the pulp storage barrel.

[0018] As a further solution of the utility model: the second storage vehicle is also provided with an automatic control system computer and a control box, wherein the control box is located below the automatic control system computer and is electrically connected to the automatic control system computer.

[0019] As a further solution of the utility model: the computer of the automatic control system and the control box are separated by a "U"-shaped bracket.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] First, the present application sets a first air supply pipeline and a second air supply pipeline. The first air supply pipeline connects the cement transport bin and the mixing bin of the pneumatic mixing pulping machine, and can blow the cement into the mixer through the underground compressed air for mixing; the second air supply pipeline is connected to the pneumatic mixing pulping machine as an air motor, and can provide a power source for the air motor through compressed air, thereby reducing the investment in electrical equipment. For high-gas mines, it reduces safety hazards, and the pipeline closed-loop pulping solves the problem of dust from artificial pulping, which is beneficial to the underground environmental system;

[0022] Secondly, the present application sets up a first storage cart and a second storage cart, installs the cement transport bin in the first storage cart, and installs the slurry storage barrel and the pneumatic mixing slurry machine on the second storage cart, and realizes the transportation and supply of cement and equipment through the storage cart, provides convenience for the staff, liberates labor, and improves the slurry quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a device for producing cement slurry with compressed air in underground coal mines according to an embodiment of the utility model;

[0024] Figure 2 This is a schematic structural diagram of a second storage vehicle according to an embodiment of the utility model;

[0025] Figure 3 This is a schematic structural diagram of a first storage cart according to an embodiment of the utility model;

[0026] Explanation of the reference numerals in the accompanying drawings: 1. First storage cart; 2. Cement transport bin; 3. Inlet ball valve; 4. First air supply pipeline; 5. Second air supply pipeline; 6. Discharge pipe; 7. Slurry storage barrel; 8. Second storage cart; 9. Pneumatic mixing pulping machine; 10. Automatic control system computer; 11. Slurry discharge pipeline; 12. Pressure gauge; 13. Control box; 14. Grouting pump. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Reference Figure 1 A compressed air cement slurry device for underground coal mines includes a first storage cart 1 and a second storage cart 8, wherein the second storage cart 8 is located at the rear side of the first storage cart 1, and the first storage cart 1 and the second storage cart 8 are both provided with walking wheels at the bottom, and the first storage cart 1 and the second storage cart 8 can be moved to the required position according to the grouting needs. It should be noted that the table tops of the first storage cart 1 and the second storage cart 8 are flat table tops, which can be used to place the required equipment.

[0029] Reference Figure 3Two cement transport bins 2 are placed on the table of the first storage vehicle 1, which can be used to store cement. With the assistance of the first storage vehicle 1, the cement transport bins 2 can be moved. After being moved to the required position, cement can be imported or exported, which solves the problem that the traditional underground grouting work in coal mines mainly relies on manual transportation of bagged cement and manual bag breaking and pouring. The cement transport bins 2 provide convenience for the staff and save manpower and material resources.

[0030] It should be noted that the cement transport bin 2 of the present application is welded with Q235 steel plates, with a pressure resistance of 0.8kg and a total bulk density of about 3.3 tons. The fluidized bed principle is adopted, and the compressed air can be purified by the oil-water separator and enter the cement transport bin, and flow out through the cement transport bin discharge port. The discharge port of the cement transport bin 2 is connected to the pneumatic mixing pulping machine 9 through a hose, and the hose is connected to the pump in the middle. It is estimated that the cement in the soft pipe can be pumped to form a jet and transported to the mixing barrel of the mixer, thus forming a closed-loop pulping. The compressed air pulping equipment adopts automatic control, which can greatly improve the pulping efficiency and reduce the labor intensity of workers in coal mines; while ensuring the pulping work efficiency, it also improves the pulping quality.

[0031] Reference Figure 1 and Figure 3 The liquid inlet of the cement transport bin 2 is connected to the first air supply pipeline 4, and the other end of the first air supply pipeline 4 is connected to the inlet ball valve 3. The wind of the first air supply pipeline 4 comes from the compressed air in the underground tunnel, and the discharge port of the cement transport bin 2 is connected to the pneumatic mixing pulping machine 9 on the second storage vehicle 8 through the discharge pipe 6. The purpose of the connection here is that the compressed air from the underground tunnel can first enter the cement transport bin 2, and then blow the cement in the cement transport bin 2 into the discharge pipe 6, and then enter the pneumatic mixing pulping machine 9 through the discharge pipe 6. After the cement enters the pneumatic mixing pulping machine 9, it can be mixed by the pneumatic mixing pulping machine 9.

[0032] It should be noted that the pneumatic mixing pulping machine 9 of the present application is driven by an air motor, a main shaft is coaxially arranged on the air motor, and a spiral mixing blade is coaxially arranged on the main shaft. The spiral mixing blade can be used to mix water into cement in the mixing barrel to form a slurry.

[0033] Reference Figure 1 , Figure 2 and Figure 3One end of the second air supply pipeline 5 is also connected to the inlet ball valve, and the seal of the second air supply pipeline also comes from the compressed air in the underground tunnel. The other end of the second air supply pipeline 5 can be connected to the pneumatic motor on the pneumatic mixing pulping machine 9 to provide a power source for the pneumatic motor. It should be noted here that the pneumatic motor is a conventional equipment in this field. This application is only used and no improvement has been made. Therefore, its principle is not described in detail in this application. This application uses the compressed air in the underground air supply pipeline as the power source, which reduces the investment in electrical equipment. As for high-gas mines, it reduces safety hazards.

[0034] Reference Figure 2 , from left to right on the platform of the second storage vehicle 8 (left and right here are Figure 1 or Figure 2 As a reference, a slurry storage barrel 7, a pneumatic stirring pulping machine 9, an automatic control system computer 10 and a control box 13 are installed in sequence, wherein the slurry storage barrel 7 is used to store the prepared slurry, the pneumatic stirring pulping machine 9 is used to make pulp, and the automatic control system computer 10 and the control box 13 are used to intelligently control the equipment in grouting.

[0035] Furthermore, the outer side of the pneumatic agitator pulping machine 9 is detachably mounted on the second storage vehicle 8 via a support rod, and the slurry storage barrel 7 is arranged below the pneumatic agitator pulping machine 9, so that the slurry in the pneumatic agitator pulping machine 9 can enter the slurry storage barrel 7 through the slurry discharge pipeline 11. A pressure gauge 12 is also installed on the slurry discharge pipeline 11 to detect the real-time pressure when the slurry is discharged. The pipeline closed-loop pulping of this application solves the problem of dust generation during artificial pulping and is beneficial to the underground environmental system.

[0036] The specific operating principles of this application are as follows:

[0037] The pulping process of the present application can realize one-key automatic control. After one-key start, first open the water inlet ball valve of the pulping mixer 9 (not shown in this article), and then open the air inlet electric ball valve of the pneumatic motor of the stirring pulping machine 9 (not shown in this article), so that water can enter the mixing barrel of the pneumatic stirring pulping machine 9. After that, the weighing system of the stirring pulping machine 9 (the present application installs a load-bearing sensor at the bottom of the pneumatic stirring pulping machine 9 to detect the weight of the pulping machine, which is not shown in this article) detects that the water volume reaches the set value, first open the inlet ball valve 3 and the air inlet valve of the cement transport bin 2 (not shown in this article), and weigh the cement transport bin 2. The silo is restarted, and the discharge ball valve (not shown in this article) of the discharge port of the cement transport silo 2 is opened after a delay of a few seconds, and cement is injected into the pulping mixer 9 through the discharge pipe 6, and the pulp is stirred. After the set cement consumption is met, the slurry discharge valve at the bottom of the pulping mixer 9 is opened, and the slurry flows to the slurry storage barrel 7 through the slurry discharge pipeline 11. A liquid level sensor (not shown in this article) is installed on the top of the slurry storage barrel 7. When the liquid level reaches the upper limit, the grouting is stopped, and the slurry is automatically started at the lower limit; the bottom of the slurry storage barrel 7 of the present application is connected to the slurry suction port of the grouting pump 14 (the grouting pump is used to suck the slurry in the slurry storage barrel 7) by a hose through a flow meter. The grouting pump 14 can be installed on the left side of the slurry storage barrel.

[0038] 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 aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A compressed air cement slurry device for underground coal mines, comprising a cement transport bin (2) and a slurry storage barrel (7) located on one side of the cement transport bin (2), characterized in that: It also includes an air inlet ball valve (3) and a pneumatic stirring pulping machine (9) arranged on one side of the cement transport bin (2), wherein the air inlet ball valve (3) is connected to a first air supply pipeline (4) and a second air supply pipeline (5); The first air supply pipeline (4) is connected to the air inlet of the cement transport bin (2), and the discharge port of the cement transport bin (2) is connected to the mixing bin body of the pneumatic mixing pulping machine (9) through the discharge pipe (6); The second air supply pipeline (5) is connected to the pneumatic motor of the pneumatic stirring pulping machine (9).

2. The device for producing cement slurry by compressed air in underground coal mines according to claim 1, characterized in that: The cement transport bin (2) is installed on the first storage vehicle (1).

3. The device for producing cement slurry by compressed air in underground coal mines according to claim 1, characterized in that: The pulp storage barrel (7) and the pneumatic stirring pulping machine (9) are installed on the second storage vehicle (8), and the bottom liquid outlet of the pneumatic stirring pulping machine (9) is connected to the pulp storage barrel (7) through a pulp discharge pipeline (11).

4. The device for producing cement slurry by compressed air in underground coal mines according to claim 3, characterized in that: The slurry discharge pipeline (11) is provided with a control valve, and a pressure gauge (12) is also provided on the slurry discharge pipeline (11).

5. The device for producing cement slurry by compressed air in underground coal mines according to claim 3, characterized in that: The outer side of the pneumatic stirring pulping machine (9) is mounted on the second storage vehicle (8) via a support rod.

6. The device for producing cement slurry by compressed air in underground coal mines according to claim 3, characterized in that: The pneumatic stirring pulping machine (9) is arranged higher than the pulp storage barrel (7).

7. The device for producing cement slurry by compressed air in underground coal mines according to claim 3, characterized in that: The second storage vehicle (8) is also provided with an automatic control system computer (10) and a control box (13), wherein the control box (13) is located below the automatic control system computer (10) and is electrically connected to the automatic control system computer (10).

8. The device for producing cement slurry by compressed air in underground coal mines according to claim 7, characterized in that: The automatic control system computer (10) and the control box (13) are separated by a "U"-shaped bracket.

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