Negative angle deep hole intelligent gas extraction and drainage device for coal mines

Abstract

The negative angle deep hole intelligent gas extraction and drainage device for coal mines relates to coal mine drainage and gas extraction equipment; the end of the main pipe is connected to the gas extraction pipe, a main pipe valve is arranged on the main pipe, a bypass pipe is arranged at the main pipe valve, the front and rear ends of the bypass pipe are placed in the main pipe, the front end of the bypass pipe is connected to the rear end of the water extraction pipe, the rear part of the water extraction pipe is placed in the main pipe, and extends forward from the main pipe to be placed in the water in the borehole; there is a sealing ring between the main pipe mouth and the borehole; the rear part of the main pipe is connected to the drain; the main pipe in front of the main pipe valve is connected to the air intake pipe, and an air intake pipe valve is arranged on the air intake pipe; the switches of the main pipe valve and the air intake pipe valve are controlled by the timing conversion switch in the control box; the main pipe valve is closed / opened synchronously with the air intake pipe valve. The beneficial effects of the present invention are: the casing technology is adopted to combine positive pressure drainage and negative pressure gas extraction into one, so as to realize automatic and efficient gas extraction and drainage of the borehole, thereby improving the working efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine machinery, and further relates to a coal mine water and gas extraction device, in particular to a negative angle deep hole intelligent gas extraction and drainage device for coal mines. Background Art

[0002] Coal mining must ensure the safety and efficiency of the mine. In the process of coal mining, in order to reduce the gas content during coal seam mining, coal seam gas advance discharge has been widely used. The method adopted is to drill gas extraction holes on the coal wall, where there will be problems with gas and water; gas extraction and water extraction are required.

[0003] The existing technology of drilling and gas extraction and drainage is not mature yet. In many equipments, gas extraction and drainage are separated, which is inefficient, affecting the progress of operations and further affecting the economic income of coal mines. Summary of the invention

[0004] The purpose of the present invention is to provide a negative angle deep hole intelligent gas extraction and drainage device for coal mines, which can automatically and efficiently perform gas extraction and drainage work in drilling holes.

[0005] The object of the present invention is achieved through the following solutions:

[0006] A negative angle deep hole intelligent gas extraction and drainage device for coal mines comprises a gas extraction pipe, a main pipe and a water pumping pipe, the end of the main pipe is connected to the gas extraction pipe, and the gas extraction pipe is connected to the exhaust device; the characteristic is that: a main pipe valve is arranged on the main pipe, a bypass pipe is arranged at the main pipe valve, the front end and rear end of the bypass pipe are arranged in the main pipe, the front end of the bypass pipe is connected to the rear end of the water pumping pipe, the rear part of the water pumping pipe is arranged in the main pipe, and extends forward from the main pipe to be placed in the water in the borehole; the front end of the main pipe extends into the borehole, and a sealing ring is arranged between the main pipe mouth of the main pipe and the orifice of the borehole; the rear part of the main pipe is connected to a drain; the main pipe in front of the main pipe valve is connected to the air intake pipe, the air intake pipe leads to the gas source, and an air intake pipe valve is arranged on the air intake pipe; the switch of the main pipe valve and the air intake pipe valve is controlled by the timing conversion switch in the control box; the closing / opening of the main pipe valve is synchronized with the opening / closing of the air intake pipe valve.

[0007] further:

[0008] The timing conversion switch refers to an electronically controlled timing converter, and its specific structure is: the timing device controls the solenoid valve, and the solenoid valve has two controls, one is: the main valve is closed and the intake pipe valve is opened at the same time, thereby starting the water pumping operation; the other is: the main valve is opened and the intake pipe valve is closed at the same time, thereby starting the gas pumping operation.

[0009] The timing conversion switch refers to a gas-controlled timing converter, and its specific structure is: the automatic switch is connected to the gas source through the gas source pipe on the one hand, and the automatic switch outputs gas through six channels on the other hand, and the six channels are respectively connected to: one interface of the timer A, the timer B, the gas-controlled valve A, the gas-controlled valve B, and the gas-controlled valve C; the other four interfaces of the gas-controlled valve C are respectively connected to one interface of the timer A, the timer B, the three-way A, and the three-way B, and the other two interfaces of the three-way A are respectively connected to the timer A and the gas-controlled valve A; the other two interfaces of the three-way B are respectively connected to the delay B and the gas-controlled valve B; the other two interfaces of the gas-controlled valve A are respectively connected to the gas-controlled pipe A and the gas-controlled pipe B; the gas-controlled pipe A and the gas-controlled pipe B lead to the actuator, and the switch of the main valve is controlled by the actuator; the other two interfaces of the gas-controlled valve B are respectively connected to the gas-controlled pipe C and the gas-controlled pipe D; the gas-controlled pipe C and the gas-controlled pipe D lead to the intake pipe valve and control the switch of the intake pipe valve.

[0010] The bypass pipe has a structure of two front and rear Z-shaped transparent pipes, wherein the rear end of the front Z-shaped transparent pipe is placed outside the main pipe and the front end is placed inside the main pipe; the rear end of the rear Z-shaped transparent pipe is placed inside the main pipe and the front end is placed outside the main pipe.

[0011] The front end of the water pumping pipe is provided with a filter hole.

[0012] The front part of the main pipe adopts curved pipes with different curvatures or is connected to the main pipe opening through a movable curved pipe.

[0013] A purifier is arranged at the air inlet of the air source pipe.

[0014] An observation tube is installed between the rear end of the front Z-shaped transparent tube and the front end of the rear Z-shaped transparent tube.

[0015] A three-way pipe is arranged at the observation pipe.

[0016] The design principle of the present invention is: open the positive pressure air intake pipeline, the positive pressure air intake pipeline and the negative pressure extraction pipeline work together to achieve drainage; close the positive pressure air intake pipeline, and the negative pressure extraction pipeline is used to extract gas; drainage and gas extraction are automatically performed alternately.

[0017] The beneficial effect of the present invention is that the casing technology is adopted to combine positive pressure drainage and negative pressure gas extraction into one, so as to realize automatic and efficient gas extraction and drainage work of drilling holes, thereby improving the working efficiency. It is suitable for gas extraction and drainage work of drilling holes inclined downward (i.e., drilling holes at negative angles) in coal mines.

[0018] In order to enable those skilled in the art to better understand the scheme of the present invention and to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the present invention is further described in detail below in conjunction with embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1is a schematic diagram of the structure of the present invention, Figure 2 This is the working block diagram of the electronically controlled timing converter of the control box of the present invention. Figure 3 This is a schematic diagram of the structure of the gas-controlled timing converter of the control box of the present invention. Figure 4 It is a schematic diagram of the installation position of the tee C of the present invention.

[0020] In the figure: 1 is a gas extraction pipe, 2 is a main pipe, 3 is a drain, 4 is a rear Z-type through-tube, 5 is an observation pipe, 6 is a front Z-type through-tube, 7 is a main valve, 8 is an actuator, 9 is an air control pipe A, 10 is an air control pipe B, 11 is a control box, 12 is an air source pipe, 13 is a purifier, 14 is an air source interface, 15 is an air intake pipe, 16 is an air intake pipe valve, 17 is an air control pipe C, 18 is an air control pipe D, 19 is a sealing ring, 20 is a main pipe port, 21 is a borehole, 22 is a water extraction pipe, 31 is an automatic switch, 32 is a six-way, 33 is a delay device A, 34 is a delay device B, 35 is a three-way A, 36 is a three-way B, 37 is an air control valve A, 38 is an air control valve B, 39 is an air control valve C, and a three-way C41. DETAILED DESCRIPTION

[0021] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a negative angle deep hole intelligent gas extraction and drainage device for coal mines is provided, a main pipe valve 7 (gas-controlled butterfly valve) is provided on the main pipe 2 (the main pipe valve 7 can be fixed on the main pipe 2 through a flange), and Z-shaped transparent pipes are provided before and after the main pipe valve 7, respectively, the rear end of the front Z-shaped transparent pipe 6 is placed outside the main pipe 2, and the front end is placed inside the main pipe 2; the rear end of the rear Z-shaped transparent pipe 4 is placed inside the main pipe 2, and the front end is placed outside the main pipe 2; an observation pipe 5 is installed between the rear end of the front Z-shaped transparent pipe 6 and the front end of the rear Z-shaped transparent pipe 4 to observe the pumping situation; the front end of the front Z-shaped transparent pipe 6 is connected to the rear end of the pumping pipe 22, and the pumping The rear end of the water pipe 22 is placed in the main pipe 2 and extends forward from the main pipe 2; due to the need to drill holes at different negative angles, the main pipe 2 can be connected and converted using curved pipes of different curvatures, or it can be connected through a movable curved pipe such as a hose or a telescopic pipe, that is, the rigid main pipe 2 is connected to the curved pipe, hose or telescopic pipe, and then connected to the rigid main pipe 2; the main pipe port 20 at the front end of the main pipe 2 is placed in the borehole 21, and a sealing ring 19 is provided between the main pipe port 20 of the main pipe 2 and the orifice of the borehole 21 to form a closed space, so that the bottom of the borehole 21 is water and gas is stored in the upper part of the borehole 21. The front end of the water extraction pipe 22 is placed in water, and a filter hole is provided at the front end to avoid blockage caused by the inhalation of large particles. A tee C41 can be provided on the observation pipe 5. Normally, the first and second ports of the tee C41 are in a normally open state; the third port of the tee C41 is in a closed state and does not hinder the pumping operation; when the water extraction pipe 22 is blocked, the third port of the tee C41 is opened to clear the blockage (see Figure 4 ).

[0022] The rear part of the main pipe 2 is connected to the drain 3, and the water drawn out from the water extraction pipe 22 bypasses the main pipe valve 7 through the front and rear two Z-shaped transparent pipes and is discharged through the drain 3; the end of the main pipe 2 is connected to the gas extraction pipe 1; the gas extraction pipe 1 is connected to the suction device, thus forming a negative pressure extraction pipeline, which is helpful for drainage.

[0023] During the pumping operation, the main valve 7 is closed and the air inlet valve 16 is opened at the same time, so that the outside air enters the borehole 21 through the air inlet pipe 15, that is, a positive pressure air inlet pipeline is formed. Under the dual action of the positive pressure air inlet pipeline at the front and the negative pressure pumping pipeline at the back, the water in the borehole 21 is smoothly pumped out.

[0024] When the water extraction reaches a certain level, the main valve 7 is opened and the air inlet valve 16 is closed. Under the action of the air suction device of the gas extraction pipe 1, the gas is sucked into the gas extraction pipe 1 and finally collected or discharged. The gas extraction and water extraction operations are performed alternately until the standard is reached.

[0025] One end of the air intake pipe 15 is connected to the main pipe 2 in front of the main valve 7, and the other end is connected to the gas source; the air intake pipe 15 is provided with an air intake pipe valve 16, and the air intake pipe valve 16 is controlled by the control box 11; the gas in the control box 11 comes from the gas source, that is, the gas source is connected to the gas source through the gas source pipe 12, and a purifier 13 is provided at the gas source interface 14 of the gas source pipe 12 to prevent debris from entering.

[0026] The main valve 7 can be a gas-controlled valve or an electric-controlled valve, and the air inlet valve 16 can be a gas-controlled valve or an electric-controlled valve; correspondingly, the control box 11 can be a gas-controlled timing converter or an electric-controlled timing converter.

[0027] like Figure 2 As shown, the control box 11 can be provided with an electronically controlled timing converter, the specific structure of which is:

[0028] The timing device controls the solenoid valve, which has two controls: one is that the main valve is closed while the air inlet valve is opened, thereby starting the water pumping operation; the other is that the main valve is opened while the air inlet valve is closed, thereby starting the gas pumping operation.

[0029] like Figure 3 As shown, the control box 11 can also be provided with a gas-controlled timing converter, the specific structure of which is:

[0030] On the one hand, the automatic switch 31 is connected to the gas source through the gas source pipe 12, and on the other hand, the automatic switch 31 outputs gas through the six-way 32. The output pipes of the six-way 32 are respectively connected to: one interface of the delay device A33, the delay device B34, the gas control valve A37, the gas control valve B38, and the gas control valve C39; the other four interfaces of the gas control valve C39 are respectively connected to one interface of the delay device A33, the delay device B34, the three-way A35, and the three-way B36; the other two interfaces of the three-way A35 are respectively connected to the delay device A33, the gas control valve A37, the gas control valve B38, and the gas control valve C39. 37; the other two interfaces of the three-way B36 are connected to the delay device B34 and the air-controlled valve B38 respectively; the other two interfaces of the air-controlled valve A37 are connected to the air-controlled pipe A9 and the air-controlled pipe B10 respectively; the air-controlled pipe A9 and the air-controlled pipe B10 are connected to the actuator 8 and control the actuator 8; the actuator 8 controls the opening and closing of the main valve 7; the other two interfaces of the air-controlled valve B38 are connected to the air-controlled pipe C17 and the air-controlled pipe D18 respectively; the air-controlled pipe C17 and the air-controlled pipe D18 lead to the intake pipe valve 16 and control the opening and closing of the intake pipe valve 16. Among them, six-way valve 32, three-way valve A35 and three-way valve B36 are unconditionally conductive and only play the role of dividing the gas path; air-controlled valve C39, air-controlled valve A37 and air-controlled valve B38 are conditionally conductive; air-controlled valve C39, air-controlled valve A37, air-controlled valve B38, delay device A33 and delay device B34 all adopt the principle of air pressure balance conversion to realize the conversion of working positions; the air-controlled valve C39 adopts a five-port three-position air-controlled valve, that is, it has 5 air interfaces and 3 working positions, and the commonly used 4A220-08 model on the market can be used (SMS and AIRTAC products are usually used); the air-controlled valve A37 and air-controlled valve B38 both choose a five-port two-position air-controlled valve, that is, it has 5 air interfaces and 2 working positions, and 4 of the air interfaces are selected, and the commonly used 4A210-08 model on the market can be used (SMS and AIRTAC products are usually used).

[0031] The working process of the control box 11 is: the automatic switch 31 is turned on - the six-way 32 is inlet - the air control valve C39A is connected, the timer A33 starts to work, the air control valve A37 forms the air inlet control pipe A9 and the air outlet control pipe B10, and the main valve 7 is closed through the actuator 8; the air inlet pipe valve 16 is turned on, and the drainage operation starts - the timing time is up - the air control valve C39B is connected, the timer B34 starts to work, the air control valve B38 forms the air inlet control pipe C17 and the air outlet control pipe D18, and the air inlet pipe valve 16 is closed; the air control valve A37 forms the air inlet control pipe B10 and the air outlet control pipe A9, and the main valve 7 is opened through the actuator 8, and the gas extraction operation starts - the timing time is up - the air control valve C39A is connected, the timer A33 starts to work, the air control valve A37 forms the air inlet control pipe A9 and the air outlet control pipe B10, and the main valve 7 is closed through the actuator 8; the air inlet pipe valve 16 is turned on, and the drainage operation starts. After that, the cycle continues, controlling the equipment to extract gas and drain water.

[0032] When using:

[0033] 1. Drainage: In the drainage working state, the main valve 7 (air-controlled butterfly valve) remains closed, and the air inlet pipe valve 16 is opened, that is, air enters the main pipe 2 through the air inlet pipe 15, presses against the water surface in the borehole 21, and causes water to enter the water extraction pipe 22. Under the action of the negative pressure extraction pipeline (gas extraction pipe 1), the water passes through the front Z-shaped transparent pipe 6, the observation pipe 5, and the rear Z-shaped transparent pipe 4, and is guided to the main pipe 2 at the rear of the main valve 7, and is discharged through the water discharger 3. That is, the air inlet pipe 15 pressurizes the water surface in the borehole through the main pipe 2, and the gas extraction pipe 1 provides the negative pressure for water extraction, and the two work together to discharge the accumulated water in the borehole.

[0034] 2. Gas extraction: When the gas extraction is in working state, the air inlet valve 16 is closed, the main valve 7 is opened, and the negative pressure of the gas extraction pipeline (gas extraction pipe 1) enters the borehole 21 to extract the gas in the borehole 21.

[0035] 3. Conversion between drainage and gas extraction: The conversion between drainage and gas extraction is controlled by the gas control box 11. The gas control box 11 presets the duration of water extraction and gas extraction. When the water extraction time reaches the preset duration, the intelligent gas control box 11 sends a conversion signal, and the air intake pipe valve 16 (air-controlled ball valve) and the main valve 7 (air-controlled butterfly valve) instantly switch the working state, the air intake pipe valve 16 is closed and the main valve 7 is opened at the same time, and gas extraction is carried out; when the gas extraction reaches the preset duration, the gas control box 11 sends a conversion signal again to switch the work, the air intake pipe valve 16 (air-controlled ball valve) and the main valve 7 (air-controlled butterfly valve) instantly switch the working state, the air intake pipe valve 16 is opened and the main valve 7 is closed at the same time, and drainage is carried out. This method is repeated repeatedly to carry out intermittent drainage and gas extraction.

[0036] 4. Preset the duration of two working states; the single effective conversion time of the timer is 0-60min, the drainage time is 0-60min, and the gas extraction time is 0-60min. According to the water storage in the borehole, the duration of the two working states can be appropriately adjusted.

[0037] 5. Usage environment: Negative angle gas extraction holes (downward gas extraction holes) with serious water accumulation. The negative angle refers to horizontal downward.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in the field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A negative angle deep hole intelligent gas extraction and drainage device for coal mines, comprising a gas extraction pipe, a main pipe, and a water extraction pipe. The end of the main pipe is connected to the gas extraction pipe, and the gas extraction pipe is connected to the exhaust device; the characteristics are: The main pipe is provided with a main pipe valve, a bypass pipe is provided at the main pipe valve, the front end and rear end of the bypass pipe are placed in the main pipe, the front end of the bypass pipe is connected to the rear end of the water extraction pipe, the rear end of the water extraction pipe is placed in the main pipe, and extends forward from the main pipe to be placed in the water in the borehole; the front end of the main pipe extends into the borehole, and a sealing ring is provided between the main pipe mouth of the main pipe and the orifice of the borehole; the rear end of the main pipe is connected to the drain; the main pipe in front of the main pipe valve is connected to the air intake pipe, the air intake pipe leads to the air source, and an air intake pipe valve is provided on the air intake pipe; the switches of the main pipe valve and the air intake pipe valve are controlled by the timing conversion switch in the control box; the closing / opening of the main pipe valve is synchronized with the opening / closing of the air intake pipe valve; The bypass pipe has a structure of: two front and rear Z-shaped transparent pipes, the rear end of the front Z-shaped transparent pipe is placed outside the main pipe, and the front end is placed inside the main pipe; the rear end of the rear Z-shaped transparent pipe is placed inside the main pipe, and the front end is placed outside the main pipe; The front end of the water pumping pipe is provided with a filter hole; An observation tube is installed between the rear end of the front Z-shaped transparent tube and the front end of the rear Z-shaped transparent tube; The timing conversion switch is an electronically controlled timing converter, and its specific structure is: the timing device controls the electromagnetic valve, and the electromagnetic valve has two controls, one is: the main valve is closed and the air intake valve is opened, so as to start the water pumping operation; the other is: the main valve is opened and the air intake valve is closed, so as to start the gas pumping operation; Or the timing conversion switch is a gas-controlled timing converter, and its specific structure is: the automatic switch is connected to the gas source through the gas source pipe on the one hand, and the automatic switch outputs gas through six channels on the other hand, and the six channels are respectively connected to: one interface of the timer A, the timer B, the gas-controlled valve A, the gas-controlled valve B, and the gas-controlled valve C; the other four interfaces of the gas-controlled valve C are respectively connected to one interface of the timer A, the timer B, the three-way A, and the three-way B, and the other two interfaces of the three-way A are respectively connected to the timer A and the gas-controlled valve A; the other two interfaces of the three-way B are respectively connected to the delayer B and the gas-controlled valve B; the other two interfaces of the gas-controlled valve A are respectively connected to the gas-controlled pipe A and the gas-controlled pipe B; the gas-controlled pipe A and the gas-controlled pipe B lead to the actuator, and the switch of the main valve is controlled by the actuator; the other two interfaces of the gas-controlled valve B are respectively connected to the gas-controlled pipe C and the gas-controlled pipe D; the gas-controlled pipe C and the gas-controlled pipe D lead to the intake pipe valve and control the switch of the intake pipe valve.

2. The negative angle deep hole intelligent gas extraction and drainage device for coal mines according to claim 1 is characterized in that: The front part of the main pipe adopts curved pipes with different curvatures or is connected to the main pipe opening through a movable curved pipe.

3. The negative angle deep hole intelligent gas extraction and drainage device for coal mine according to claim 1 is characterized in that: A purifier is arranged at the air inlet of the air source pipe.

4. The negative angle deep hole intelligent gas extraction and drainage device for coal mine according to claim 1 is characterized in that: A three-way pipe is arranged at the observation pipe.

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