Pipeline cleaning device for tailing filling

Abstract

The pipeline cleaning device comprises a water inlet pipe (1), a filling pipe (5) and an air inlet pipe (6), the filling pipe (5) is located on the upper portion of the earth surface and communicated with the outlet end of the water inlet pipe (1), an outlet of the filling pipe (5) is connected with an underground filling stope, and the underground portion of the filling pipe (5) is provided with a control electric gate valve (9). An air inlet electric gate valve (7) is arranged on the air inlet pipe (6), one end of the air inlet pipe (6) is connected with an air compressor, and the other end of the air inlet pipe (6) is communicated with the middle part of the water inlet pipe (1); a water inlet electric gate valve (2) is arranged on a water inlet section of the water inlet pipe (1), and an exhaust flange (3) is arranged on a water outlet section of the water inlet pipe (1). The filling pipe is used as a gas-liquid mixing container, and under the action of natural pressure difference and wind pressure, pipe washing water in the filling pipe flows at a high speed, and residues in the pipe are flushed out of the pipe; meanwhile, the vertical pressure difference of pipe washing water is provided through the height of the filling pipe, and the pipe washing effect is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of underground mine tailings filling, and in particular relates to a pipeline cleaning device for tailings filling, which is particularly suitable for pipeline cleaning for full-pipe-flow tailings filling. Background Art

[0002] After the filling work of the filling system is completed, a large amount of filling slurry still remains in the conveying pipeline. The conventional practice in the industry is to stop adding aggregates and cement powder in the mixing system, and only add water. Use water to clean the mixer and filling pump hopper, and use the power of the filling pump or gravity to clean the filling pipeline. The disadvantage of this method is that the filling area needs to deal with a large amount of wastewater generated by pipe washing, and the slurry bonded to the inner wall of the pipe is difficult to be washed clean by water.

[0003] If these waters are directly discharged into the mining area, the concentration of the filling slurry will be greatly reduced. Especially for the mining area with layered filling method, the pipe washing water has a more obvious effect on the concentration of the pouring surface layer, which will reduce the concentration of 3 to 4 points of the pouring surface layer, causing the slurry to segregate. Fine particles of cement are carried by the seepage water to float on the surface of the slurry, while coarse particles of aggregates such as tailings settle at the bottom. Whether it is tailings without cement or cement without aggregates, the strength is not high, and the exposed filling body has obvious segregation and stratification, that is, a large amount of pipe washing water entering the mining area will greatly reduce the quality of the filling body. In addition, the pipe washing water is discharged to the outside of the mining area through the filter pipe or the rock joints and fissures. The filtered water with a large amount of fine particles of tailings and cement will also pollute the underground environment and cause harm to the underground drainage system.

[0004] Domestic mines mainly use the following methods to deal with such technical problems:

[0005] (1) Ball pressing method

[0006] A high-density sponge ball is inserted into the pipeline. The diameter of the sponge ball is slightly smaller than the filling pipeline. After insertion, water is used to push the high-density sponge ball forward along the filling pipeline to clean the filling slurry attached to the pipe wall. This method is often used for concrete transportation. The disadvantage is that it is easy to block the pipe and is not suitable for long-distance transportation.

[0007] (2) Use a three-way valve to discharge the mining area

[0008] In order to prevent pipe washing water from entering the mining area and affecting the quality of the filling body, some mines consider using a three-way valve to discharge the pipe washing water outside the mining area, that is, close the drainage valve during filling, open the slurry discharge valve to the mining area, and at the end of filling, open the drainage valve first, then close the slurry discharge valve to discharge the pipe washing water outside the mining area. This treatment method is often difficult to use because the drainage valve is blocked by the solidified slurry, and the valve has high requirements, high pressure and wear resistance, and is difficult to operate. A slight carelessness will cause pipe blockage or pipe burst accidents. This method is rarely promoted and used. Even if a small number of mines use it, the effect is very poor and it is difficult to achieve the expected effect.

[0009] (3) High-pressure air method

[0010] Some mines consider using high-pressure air to wash pipes, but the flushing effect of high-pressure air is poor, especially for slurries adhering to fine particles. It is usually combined with water. High-pressure air is first used for washing, and then flushed with a large flow of water to effectively clean the pipes. Although the water consumption is reduced compared to pure water flushing, the amount of water used for pipe washing is still not small.

[0011] Therefore, it is urgent to develop a pipeline cleaning device for tailings filling that is highly practical and can efficiently complete the filling pipeline cleaning work. Summary of the invention

[0012] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical scheme for a pipeline cleaning device for tailings filling:

[0013] The utility model discloses a pipeline cleaning device for tailings filling, which comprises a water inlet pipe and a filling pipe. The filling pipe refers to a vertical pipeline in the filling system, which is generally connected to the underground through a surface filling well or a filling borehole. The filling pipe is located at the upper part of the surface and is connected to the outlet end of the water inlet pipe. The outlet of the filling pipe is connected to the underground filling stope. The filling pipe is located at the underground part and is provided with a control electric gate valve. The utility model is characterized in that: it is also provided with an air inlet pipe, on which an air inlet electric gate valve is provided, one end of the air inlet pipe is connected to an air compressor, the air inlet electric gate valve is used to control the supply of high-pressure gas, the air compressor is used to supply high-pressure gas, and the other end of the air inlet pipe is connected to the middle part of the water inlet pipe; an inlet electric gate valve is provided on the water inlet section of the water inlet pipe to control the supply of pipe washing water; an exhaust flange is provided on the water outlet section of the water inlet pipe, the exhaust flange is used to discharge excess air when water is inlet, and also serves as a gas safety outlet. When the air pressure in the pipeline is relatively large, the exhaust flange is opened to release the pressure and exhaust.

[0014] Furthermore, a one-way valve is provided on the air inlet pipe to prevent the gas from being transported in the reverse direction and affecting the stability of the system.

[0015] Furthermore, a pressure gauge is provided on the water outlet section of the water inlet pipe, and the pressure gauge is used to monitor the air pressure in the pipe. When the air pressure reaches the set requirement, the next step of operation can be carried out.

[0016] Furthermore, the control electric gate valve is arranged in the horizontal section of the filling pipe downhole part to control the opening or closing of the entire pipe washing device.

[0017] In practical applications, the slurry pipe of the original filling system can be used as the water inlet pipe, or a separate water inlet pipe can be set up to communicate with the filling pipe.

[0018] The control electric gate valve is arranged on the horizontal section of the underground filling pipe and is used to control the opening or closing of the entire pipe washing device.

[0019] The technical principle of the utility model of a pipeline cleaning device for tailings filling is that after filling, part of the filling slurry will adhere to the wall of the filling pipe, and part will settle at the bottom of the filling pipe. If it is directly flushed with water, the flow rate of the pipe washing water cannot effectively flush the pipeline. The utility model adopts full pipe flow pipe washing, uses the filling pipe as a container for gas-liquid mixing, uses the vertical section in the filling pipeline to form a vertical pressure difference, and uses high-pressure wind to form a wind-water mixed flow. Under the action of natural pressure difference and wind pressure, the pipe washing water in the filling pipe forms a high-speed flow, which exceeds the critical flow rate of the filling slurry, and can flush the pipeline residue out of the pipeline, while saving a lot of pipe washing water.

[0020] The implementation method of the utility model is:

[0021] ① First, close the underground control electric gate valve, open the exhaust flange, open the water inlet electric gate valve, and water will enter the filling pipe from the water inlet pipe. According to the height of the filling pipe, select the water inlet volume, which is generally controlled at 1-2m 3 .

[0022] ②Then close the exhaust flange, close the water inlet electric gate valve, open the air inlet electric gate valve, and start air intake; high-pressure gas enters the entire system from the air intake pipe 6. By observing the pressure gauge, it can be judged whether the pressure in the system meets the requirements. The general pressure value is set at 0.7~0.8Mpa.

[0023] ③ Then wait for the pipe washing water and high-pressure gas to be fully mixed in the filling pipe. This process takes about 3 to 5 minutes. After completion, open the control electric gate valve to allow the pipe washing water to fully flush the entire filling pipeline under the action of high-pressure gas and deadweight. There will be no situation where the pipe washing water flows slowly or can only fill half of the pipe section.

[0024] ④Finally, when all the pipe cleaning water flows out from the end of the filling pipeline, close the air inlet electric gate valve and the control electric gate valve, and the pipeline cleaning is completed.

[0025] After adopting the above technical scheme, the pipeline cleaning device for tailings filling of the utility model has the following beneficial effects:

[0026] (1) The filling pipe is used as a container for gas-liquid mixing. The pipe-washing water and high-pressure gas form a wind-water mixed flow in the filling pipe. Under the action of natural pressure difference and wind pressure, the pipe-washing water in the filling pipe forms a high-speed flow, which exceeds the critical flow rate of the filling slurry and can flush the pipe residue out of the pipeline. At the same time, the height of the filling pipe is used to provide a vertical pressure difference for the pipe-washing water, and the pipe-washing effect is good!

[0027] (2) The exhaust flange is set to discharge excess air when water is entering, and also serves as a gas safety outlet. When the air pressure in the pipeline is high, open the exhaust flange to release the pressure and exhaust.

[0028] (3) The use of a one-way valve can prevent gas from being transported in reverse, thus ensuring the stability of the system.

[0029] (4) Clean the pipeline quickly and thoroughly, with each cleaning taking about 30 minutes.

[0030] (5) Save water, the water consumption for each pipeline cleaning is 1-2m 3 , saving water for filling and washing pipes.

[0031] (6) The structure is exquisite, easy to process and install, and convenient for transforming the existing filling system; it is easy to operate and can be remotely controlled automatically. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The utility model is a top view of a pipeline cleaning device for tailings filling.

[0033] Figure 2 This is a running diagram of a pipeline cleaning device for tailings filling according to the utility model.

[0034] Figure numerals: 1-water inlet pipe, 2-water inlet electric gate valve, 3-exhaust flange, 4-pressure gauge, 5-filling pipe, 6-air inlet pipe, 7-air inlet electric gate valve, 8-check valve, 9-control electric gate valve. DETAILED DESCRIPTION

[0035] In order to better describe the present invention, a pipeline cleaning device for tailings filling of the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0036] Depend on Figure 1 The utility model is a top view of a pipe cleaning device for tailings filling and combined with Figure 2It can be seen that in the embodiment, the utility model is a pipe cleaning device for tailings filling, which is composed of a water inlet pipe 1, a water inlet electric gate valve 2, an exhaust flange 3, a pressure gauge 4, a filling pipe 5, an air inlet pipe 6, an air inlet electric gate valve 7, a check valve 8, and a control electric gate valve 9. Generally, if the slurry of the original filling system can be transported by gravity, it is more convenient to directly use the slurry pipe of the original filling system as the water inlet pipe 1. If the slurry of the original filling system cannot be transported by gravity, a water inlet pipe 1 can be set up to inlet water. When the water inlet pipe 1 is set up, the pipe diameter is generally DN100. The filling pipe 5 is located at the upper part of the ground surface and is connected to the outlet end of the water inlet pipe 1. The outlet of the filling pipe 5 is connected to the underground filling field. The control electric gate valve 9 is arranged on the horizontal section of the underground part of the filling pipe 5; one end of the air inlet pipe 6 is connected to the air compressor, and the other end of the air inlet pipe 6 is connected to the middle part of the water inlet pipe 1. The air compressor is used to supply high-pressure gas. The air inlet pipe 6 is provided with an air inlet electric gate valve 7 to control the supply of high-pressure gas. The air inlet pipe 6 is also provided with a one-way valve 8 to prevent the reverse transmission of gas; the water inlet electric gate valve 2 is provided on the water inlet section of the water inlet pipe 1, and the exhaust flange 3 and the pressure gauge 4 are provided on the water outlet section of the water inlet pipe 1. The water inlet electric gate valve 2 is used to control the supply of pipe washing water. The electric gate valve is a valve controlled by an electric actuator. It is a common pipeline valve, which is easy to buy and has good sealing. In order to automatically control the entire system, this embodiment uses an electric gate valve, and the electric gate valve can also be replaced with an ordinary gate valve and controlled manually. The pressure gauge 4 is used to monitor the air pressure in the pipe.

[0037] The utility model discloses a pipeline cleaning device for tailings filling, which is operated according to the following steps:

[0038] S1 first closes the underground control electric gate valve 9, opens the exhaust flange 3, opens the water inlet electric gate valve 2, and water enters the full pipe flow tailings filling compressed air cleaning pipeline from the water inlet pipe 1. According to the height of the filling pipe 5, the water inlet volume is selected, which is generally controlled at 1-2m 3 .

[0039] Then close the exhaust flange 3, close the water inlet electric gate valve 2, open the air inlet electric gate valve 7, and start to intake air. High-pressure gas enters the entire system from the air inlet pipe 6. By observing the pressure gauge 4, it can be judged whether the pressure in the system meets the requirements. The general pressure value is set at 0.7-0.8Mpa.

[0040] Then wait for the pipe washing water and high pressure gas to be fully mixed in the filling pipe 5, which takes about 3 to 5 minutes. After completion, open the control electric gate valve 9 to allow the pipe washing water to fully flush the entire filling pipeline under the action of high pressure gas and dead weight, and there will be no situation where the pipe washing water has a slow flow rate or can only fill half of the pipe section.

[0041] Finally, when all the pipe-cleaning water flows out from the end of the filling pipeline, the air inlet electric gate valve 7 is closed, and the control electric gate valve 9 is closed, and the pipeline cleaning is completed.

Claims

1. A pipe cleaning device for tailings filling, comprising a water inlet pipe (1) and a filling pipe (5), wherein the filling pipe (5) is located above the surface and communicates with the outlet end of the water inlet pipe (1), the outlet of the filling pipe (5) is connected to the underground filling field, and the filling pipe (5) is provided with a control electric gate valve (9) in the underground part; characterized in that: It is also provided with an air inlet pipe (6), on which an air inlet electric gate valve (7) is provided, one end of the air inlet pipe (6) is connected to the air compressor, and the other end of the air inlet pipe (6) is communicated with the middle of the water inlet pipe (1); an water inlet electric gate valve (2) is provided on the water inlet section of the water inlet pipe (1), and an exhaust flange (3) is provided on the water outlet section of the water inlet pipe (1).

2. A pipe cleaning device for tailings filling as claimed in claim 1, characterized in that: A one-way valve (8) is also provided on the air inlet pipe (6).

3. A pipe cleaning device for tailings filling as claimed in claim 1 or 2, characterized in that: A pressure gauge (4) is also provided on the water outlet section of the water inlet pipe (1).

4. A pipe cleaning device for tailings filling as claimed in claim 3, characterized in that: The control electric gate valve (9) is arranged on the horizontal section of the downhole part of the filling pipe (5).

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