Blowout hole prevention gas extraction device capable of dynamically separating gas, water and slag

Abstract

The utility model relates to the technical field of gas extraction, and discloses a gas-water-slag dynamic separation blowout prevention hole gas extraction device which comprises a drilling machine, a blowout prevention hole sleeve and a gas-water-slag separation device, the front end of the blowout prevention hole sleeve is tightly embedded into surrounding rock, and a drill rod of the drilling machine movably penetrates through the blowout prevention hole sleeve in a sealed mode to drill into a coal seam; a slag outlet and a gas extraction opening are further formed in the blowout prevention hole sleeve, and the gas extraction opening is connected with an extraction pipeline through a first exhaust hose; the gas-water-slag separation device comprises a separation box and a slag discharging device arranged in the separation box, a slag inlet is formed in the bottom of the separation box, a slag outlet of the blowout prevention sleeve is connected with the slag inlet through a slag discharging hose, and the top of the separation box is connected with an extraction pipeline through a second exhaust hose. And the slag discharging device is used for discharging coal rock slag deposited in the separation box. According to the utility model, orifice blowout prevention, dynamic separation of gas, water and slag and efficient transportation and cleaning of coal and rock slag are realized, and the life safety of operators and a good construction environment are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of gas extraction, in particular to a gas extraction device for preventing gas from being extracted through blowout holes with dynamic separation of gas, water and slag. Background Art

[0002] As the depth of coal mining continues to increase, affected by ground stress and gas pressure, the gas pressure and gas content of coal seams will continue to increase. When constructing a protruding coal seam, when the borehole penetrates the coal seam or rock formation, due to the high gas pressure in the coal seam or rock formation, a large amount of coal and gas may quickly spray out of the borehole to form a blowout phenomenon. The sprayed gas carries coal powder or rock fragments with great impact and destructive power. Therefore, during the current drilling construction, a blowout prevention device needs to be installed at the hole mouth. The traditional blowout prevention device has the following defects:

[0003] 1. When a strong blowout occurs in a borehole, it will generate excessive impact force, causing the traditional orifice blowout prevention device to fail to function and become ineffective, posing a serious threat to the life safety of on-site workers and causing damage to equipment. Gas will flow into the tunnel through the cracks in the orifice wall, causing the gas concentration at the working point to increase;

[0004] 2. The traditional gas-slag separation barrel is limited by the space of the separation box and cannot handle the large amount of coal-rock slag that suddenly appears in a short period of time. Operators are also required to clean the coal-rock slag in the separation barrel regularly. There are certain shortcomings, which affect the progress of on-site construction.

[0005] Based on this, in order to prevent the loss of property, time, etc. caused by the blowout phenomenon, it is necessary to design an efficient integrated device for underground coal mine collection hole blowout prevention, dynamic gas-water-slag separation, and efficient transportation and cleaning of coal-rock slag to ensure the safety of workers and a good construction environment. Utility Model Content

[0006] The utility model aims to solve the technical problems existing in the prior art. To this end, the utility model provides a gas extraction device for blowout prevention holes with dynamic separation of gas, water and slag, which realizes blowout prevention at the hole mouth, dynamic separation of gas, water and slag, and efficient transportation and cleaning of coal and rock slag, ensuring the life safety of operators and a good construction environment.

[0007] The technical solution adopted by the utility model to solve its technical problems is:

[0008] Provided is a blowout-proof hole gas extraction device with dynamic separation of gas, water and slag, comprising a drilling rig, a blowout-proof hole sleeve and a gas-water-slag separation device, wherein the front end of the blowout-proof hole sleeve is tightly embedded in the surrounding rock, and the drill rod of the drilling rig movably and sealedly passes through the blowout-proof hole sleeve to drill into the coal seam; the blowout-proof hole sleeve is also provided with a slag outlet and a gas extraction port, and the gas extraction port is connected to a extraction pipeline via a first exhaust hose; the gas-water-slag separation device comprises a separation box and a slag outlet device arranged in the separation box, a slag inlet is provided at the bottom of the separation box, the slag outlet of the blowout-proof hole sleeve is connected to the slag inlet via a slag outlet hose, and the top of the separation box is connected to the extraction pipeline via a second exhaust hose, and the slag outlet device is used for discharging coal-rock slag deposited in the separation box.

[0009] In a preferred embodiment, the separation box includes a water storage chamber and a separation chamber which is arranged on one side of the top of the water storage chamber and is connected to the water storage chamber. The slag inlet is arranged on the side wall of the water storage chamber below the separation chamber. The top plate of the water storage chamber is also provided with a partition extending below the liquid level, which is used to separate the part of the water storage chamber above the liquid level from the separation chamber to prevent gas from escaping from the slag outlet of the water storage chamber.

[0010] In a preferred embodiment, a plurality of overflow ports are provided on the water storage chamber on the side of the partition away from the separation chamber, and a filter screen is provided on the inner wall of the water storage chamber, and the overflow ports are connected to a circulating water tank or a drainage ditch through a pipe.

[0011] In a preferred embodiment, the water storage chamber is provided with a plurality of slag inlets, which can be respectively connected to the slag outlets on the plurality of anti-spout hole sleeves, and the slag inlets not connected to the slag outlets are blocked by sealing plates.

[0012] In a preferred embodiment, the drilling rig adopts pneumatic slag removal or hydraulic slag removal for drilling holes. When pneumatic slag removal is adopted, the slag inlet is located below the liquid level of the water storage chamber.

[0013] In a preferred embodiment, the slag discharge device is a crawler-lifting type slag discharge device.

[0014] In a preferred embodiment, it also includes a pneumatic crawler transport device for receiving the coal rock slag discharged by the slag discharge device.

[0015] In a preferred embodiment, a switch valve is provided on the second exhaust hose.

[0016] In a preferred embodiment, the anti-spray hole sleeve is also provided with a pressure relief port, and the pressure relief port is provided with a collapsed bladder.

[0017] In a preferred embodiment, a hydraulic support is further included, wherein a top rod of the hydraulic support is hingedly connected to the outer wall of the anti-blowout hole sleeve for supporting the anti-blowout hole sleeve.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. The gas-water-slag separation device designed in the utility model realizes the dynamic separation of gas-water-slag. Compared with the traditional gas-slag separation barrel, its dynamic slag cleaning function will no longer be limited by the size of the slag carrying space of the traditional separation barrel, thereby improving the coal-rock slag processing efficiency; at the same time, one gas-water-slag separation device can meet the gas-water-slag separation of multiple drilling rigs, greatly improving the construction efficiency.

[0020] 2. The anti-spray hole sleeve is equipped with a retracted bag. When the amount of coal and gas sprayed and the intensity of the spray hole exceed the dynamic cleaning capacity of the device, the bag will automatically open to accommodate the excess coal and gas sprayed, preventing them from pouring into the workplace and avoiding safety accidents;

[0021] 3. The design of the hydraulic support can effectively avoid unexpected situations such as insufficient support force causing the orifice anti-blowout hole sleeve to detach and the anti-blowout effect to fail when strong blowout occurs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0023] Figure 1 It is a structural schematic diagram of a gas extraction device for preventing gas from being sucked out of a blowout hole with dynamic separation of gas, water and slag provided by the utility model;

[0024] Figure 2 yes Figure 1 A schematic structural diagram of a gas-water-slag separation device is provided.

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 1—drilling rig, 2—blowout prevention sleeve, 3—separation box, 3a—water storage chamber, 3b—separation chamber, 3.1—slag inlet, 3.2—partition, 3.3—overflow outlet, 4—slag discharge device, 5—slag discharge hose, 6—first exhaust hose, 7—second exhaust hose, 8—extraction pipeline, 9—pneumatic crawler transport device, 10—bladder bag, 11—hydraulic support. DETAILED DESCRIPTION

[0027] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only 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.

[0029] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating positions or positional relationships are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific position, be constructed and operate in a specific position, and therefore should not be understood as limiting the present invention;

[0030] In addition, the descriptions involving the terms "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. The terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] Embodiment 1

[0033] like Figure 1 and attached Figure 2 As shown, a gas extraction device for blowout prevention holes with dynamic separation of gas, water and slag comprises a drilling rig 1, a blowout prevention hole sleeve 2 and a gas, water and slag separation device, wherein:

[0034] The front end of the blowout prevention hole sleeve 2 is embedded in the surrounding rock to a certain depth and fits tightly with the hole wall to ensure its stability on the surrounding rock, while reducing the gas flowing into the tunnel along the cracks in the hole wall, which can effectively reduce the gas outflow at the work site and avoid gas exceeding the limit; the blowout prevention hole sleeve 2 is also provided with a slag outlet and a gas extraction port, and the gas extraction port is connected to the extraction pipeline 8 through a first exhaust hose 6;

[0035] The gas-water-slag separation device includes a separation box 3 and a slag discharge device 4 arranged in the separation box. A slag inlet 3.1 is provided at the bottom of the separation box 3. The slag discharge port of the anti-blowout hole sleeve 2 is connected to the slag inlet 3.1 through a slag discharge hose 5. The top of the separation box 3 is connected to the extraction pipeline 8 through a second exhaust hose 7. The slag discharge device 4 is preferably a pneumatic crawler lifting slag discharge device, which is used to discharge the coal and rock slag deposited in the separation box to avoid excessive storage of coal and rock slag in the water storage chamber causing the separation function to fail, solves the problem of limited slag storage space in the water storage chamber, does not require manual slag cleaning, reduces labor, and improves work efficiency.

[0036] The drill rod of the drilling rig 1 is movably sealed and passes through the blowout prevention sleeve 2 to drill into the coal seam.

[0037] During the specific implementation, the blowout prevention hole sleeve is first embedded in the surrounding rock, the slag discharge hose is connected to the slag discharge port of the blowout prevention hole sleeve and the slag inlet of the separation box, the second exhaust hose is connected to the separation box and the extraction pipeline, the first exhaust hose is connected to the gas extraction port of the blowout prevention hole sleeve and the extraction pipeline, and finally the drill rod of the drilling rig is passed through the blowout prevention hole sleeve and drilled into the coal seam. The coal rock slag produced during the drilling process is processed by the gas-water-slag separation device, and the gas enters the extraction pipeline.

[0038] Preferably, the separation box 3 includes a water storage chamber 3a and a separation chamber 3b connected to the water storage chamber and arranged on one side of the top of the water storage chamber 3a. The slag inlet 3.1 is arranged on the side wall of the water storage chamber 3a below the separation chamber 3b. The top plate of the water storage chamber 3a is also provided with a partition 3.2 extending below the liquid level, which is used to separate the part of the water storage chamber above the liquid level from the separation chamber to prevent gas from escaping from the slag outlet of the water storage chamber. This separation box is designed to separate gas and slag by density. The gas enters the extraction pipeline through the separation chamber, and the coal rock slag enters the water storage chamber and is deposited at the bottom of the water storage chamber. This separation method will not generate dust.

[0039] Specifically, when the drilling rig 1 uses wind-driven slag removal when drilling a hole, the slag inlet 3.1 is located below the liquid level of the water storage chamber 3a. When the gas enters the water storage chamber, it will float to the surface and enter the extraction system through the closed separation chamber, while the coal-rock slag sinks to the bottom of the water storage chamber to complete the gas-water-slag separation. This design can remove dust entrained in the gas. When the drilling rig 1 uses hydraulic slag removal when drilling a hole, the slag inlet 3.1 can be located above or below the water level, or at the water level. In this embodiment, it is preferably located above or at the water level.

[0040] Preferably, the water storage chamber 3a is provided with a plurality of overflow ports 3.3 on the side of the partition 3.2 away from the separation chamber 3b, and the overflow ports 3.3 are provided with a filter screen on the inner wall of the water storage chamber 3a, and the overflow ports 3.3 are connected to the circulating water tank or the drainage ditch through a pipe. This design allows the excess water in the water storage chamber to flow out through the overflow ports into the drainage ditch or into the circulating water tank for recycling, and the filter screen can prevent the coal slag from being discharged and clogging the drainage ditch or the circulating water system.

[0041] Preferably, the water storage chamber 3a is provided with a plurality of slag inlets 3.1, which can be respectively connected to the slag outlets on the plurality of anti-blowout hole sleeves 2, and the slag inlets not connected to the slag outlets are blocked by sealing plates. This design enables one gas-water-slag separation device to meet the gas-water-slag separation of multiple drilling rigs, greatly improving the construction efficiency.

[0042] Preferably, it also includes a pneumatic crawler transport device 9 for receiving the coal-rock slag discharged by the slag discharge device 4. Specifically, the designed carrying capacity can reach more than 1 t, and the coal-rock slag transmitted from the gas-water slag separation device can be transported to a transport belt or other locations to avoid the accumulation of coal-rock slag on site and polluting the environment. The device is equipped with a slag storage dump bucket, and the coal-rock slag can be automatically unloaded through the control console.

[0043] Preferably, a switch valve is provided on the second exhaust hose 7. When the drilling is completed, the switch valve can be closed and the drilling rig, i.e., the gas-water-slag separation device, can be removed. At the same time, a second exhaust hose with a switch valve is provided on the extraction pipeline, which can quickly connect it to the gas-water-slag separation device.

[0044] Preferably, the anti-blowout hole sleeve 2 is also provided with a pressure relief port, and a retracted bag 10 is provided on the pressure relief port. When the amount of coal and gas sprayed and the intensity of the blowout hole exceed the dynamic cleaning capacity of the device, the bag automatically opens to accommodate the excess coal and gas sprayed, preventing them from flowing into the workplace and avoiding safety accidents.

[0045] Furthermore, it also includes a hydraulic support 11, and the hydraulic support is preferably a foot-operated hydraulic support. The top rod of the hydraulic support is hingedly connected to the outer wall of the anti-blowout hole sleeve, which is used to support the anti-blowout hole sleeve. It can effectively avoid unexpected situations such as the anti-blowout hole sleeve being detached from the orifice due to insufficient supporting force when strong spraying occurs, and the anti-blowout effect failing.

[0046] Working principle: During the drilling construction process, after entering the anti-blowout hole sleeve, the coal-rock slag and gas enter the water storage chamber of the separation box through the slag discharge hose. Since the gas is not easily soluble in water, it floats to the surface and enters the separation chamber, and enters the extraction pipeline through the second exhaust hose. The coal-rock slag will sink to the bottom in the water storage chamber. The slag discharge device is started to lift the coal-rock slag and transport it to the slag storage dump truck bucket of the pneumatic crawler transport device. During the process of lifting the coal-rock slag, the slag discharge device will remove excess water in the coal-rock slag due to the inclined transmission. When the slag storage dump truck bucket is full, the slag discharge device can be temporarily closed to stop the lifting and transmission of the coal-rock slag, and the operator controls the pneumatic crawler transport device to complete the transfer of the coal-rock slag.

[0047] When the outflow of coal and gas exceeds the dynamic cleaning capacity of the device, the bag will automatically open to contain the excess coal and gas, preventing them from flowing into the workplace and avoiding safety accidents.

[0048] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A gas extraction device for blowout holes with dynamic separation of gas, water and slag, comprising a drilling rig and a blowout hole sleeve, wherein the front end of the blowout hole sleeve is tightly embedded in the surrounding rock, and the drill rod of the drilling rig is movable and sealed through the blowout hole sleeve to drill into the coal seam; characterized in that: The anti-blowout hole sleeve is also provided with a slag outlet and a gas extraction outlet, and the gas extraction outlet is connected to the extraction pipeline through a first exhaust hose; It also includes an air-water-slag separation device, which includes a separation box and a slag discharge device arranged in the separation box. A slag inlet is provided at the bottom of the separation box, and the slag outlet of the anti-blowout hole sleeve is connected to the slag inlet through a slag discharge hose. The top of the separation box is connected to the extraction pipeline through a second exhaust hose. The slag discharge device is used to discharge the coal rock slag deposited in the separation box.

2. The anti-blowout hole gas extraction device with dynamic separation of gas, water and slag according to claim 1 is characterized by: The separation box includes a water storage chamber and a separation chamber which is arranged on one side of the top of the water storage chamber and is connected to the water storage chamber. The slag inlet is arranged on the side wall of the water storage chamber below the separation chamber. The top plate of the water storage chamber is also provided with a partition extending below the liquid level, which is used to separate the part of the water storage chamber above the liquid level from the separation chamber to prevent gas from escaping from the slag outlet of the water storage chamber.

3. The anti-blowout hole gas extraction device with dynamic separation of gas, water and slag according to claim 2 is characterized by: The water storage chamber is also provided with a plurality of overflow ports on the side of the partition away from the separation chamber. The overflow ports are located on the inner wall of the water storage chamber and are provided with a filter screen. The overflow ports are connected to a circulating water tank or a drainage ditch through a pipeline.

4. The anti-blowout hole gas extraction device with dynamic separation of gas, water and slag according to claim 2 is characterized by: The water storage chamber is provided with a plurality of slag inlets, which can be respectively connected to the slag outlets on the plurality of anti-spout hole sleeves, and the slag inlets not connected to the slag outlets are blocked by sealing plates.

5. The anti-blowout hole gas extraction device with dynamic separation of gas, water and slag according to claim 4 is characterized by: The drilling rig adopts pneumatic slag removal or hydraulic slag removal when drilling holes. When pneumatic slag removal is adopted, the slag inlet is located below the liquid level of the water storage chamber.

6. The anti-blowout hole gas extraction device with dynamic separation of gas, water and slag according to claim 1 is characterized by: The slag discharging device adopts a pneumatic crawler lifting type slag discharging device.

7. The anti-blowout hole gas extraction device with dynamic separation of gas, water and slag according to claim 1 is characterized by: It also includes a pneumatic crawler transport device for receiving the coal rock slag discharged by the slag discharge device.

8. The anti-blowout hole gas extraction device with dynamic separation of gas, water and slag according to claim 1 is characterized by: The second exhaust hose is provided with a switch valve.

9. The anti-blowout hole gas extraction device with dynamic separation of gas, water and slag according to claim 1 is characterized by: The anti-spray hole sleeve is also provided with a pressure relief port, and the pressure relief port is provided with a collapsed bladder.

10. The gas extraction device for blowout prevention holes with dynamic separation of gas, water and slag according to any one of claims 1 to 8, characterized in that: It also includes a hydraulic support, the top rod of which is hingedly connected to the outer wall of the anti-blowout hole sleeve and is used to support the anti-blowout hole sleeve.

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