Closed dedusting deslagging blowout prevention hole system buffer device and using method thereof

Abstract

The invention discloses a closed dedusting deslagging blowout prevention system buffer device and a using method thereof.The closed dedusting deslagging blowout prevention system buffer device comprises a box body, a high negative pressure pipeline connector, a low negative pressure pipeline connector and a box body spraying device are arranged on the left side and the right side of the top of the box body respectively, and the high negative pressure pipeline connector and the low negative pressure pipeline connector are connected to a high negative pressure pipe and a low negative pressure pipe respectively; the left side of the box body is provided with a slag and water discharging port, and the right side of the box body is sequentially provided with a dust removal device negative pressure pumping port, an orifice slag discharging and conveying port and a sewage high-pressure water switching port from top to bottom, and the dust removal device negative pressure pumping port, the orifice slag discharging and conveying port and the sewage high-pressure water switching port are connected to a dust discharging pipe of a hole spraying prevention dust remover, a slag discharging pipe of a drilling machine and a high-pressure water pipe respectively. The anti-spraying hole dust remover is connected to a dust collecting pipe connected with the drilling machine. Drilling cuttings generated in the drilling construction process, compressed air used for deslagging and gas enter the buffer box in a unified mode, centralized treatment is carried out, and the problems that in the drilling process, dust prevention and control are difficult, gas fluctuates, and an extraction pipeline is blocked by accumulated slag are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of dust removal, slag discharge and anti-spray hole system buffer equipment, and in particular to a closed dust removal, slag discharge and anti-spray hole system buffer device and a use method thereof. Background Art

[0002] Most of the mines in southwest my country are close-range coal seam groups, and most of them are coal and gas outburst coal seams. The geological structure of coal mines is complex, the gas pressure is high, the gas content is high, the permeability is low, and the risk of outburst is strong. The importance of mine outburst prevention is increasing day by day. At this stage, the gas in the coal body is mainly extracted by drilling holes during construction. Gas extraction has become an important basis for judging the implementation of "one mine, one policy" and "one face, one policy", and it is also an important link to ensure safe production.

[0003] Gas extraction is the most important measure for gas control in coal mining, and drilling is the prerequisite for gas extraction. Affected by geological conditions, the use of high-pressure water as a slag removal medium during drilling construction results in insufficient water pressure and poor slag removal effect, or the coal rock layer expands when exposed to water and often collapses, and the borehole pipe rate does not meet the design requirements, which cannot meet the current gas control and coal and gas outburst prevention requirements, seriously restricting mine safety production; high-pressure water used for slag removal is not easy to collect during the drilling process, which increases the difficulty of underground water control and the creation of a safe working environment, and infiltrates into the bottom plate to accelerate the speed of tunnel bottom drum, increasing the amount of engineering work for later mine production and maintenance tunnel space; secondly, when high-pressure water is used as a slag removal medium, the collapse of the borehole and deep hole drilling are seriously affected by water pressure and water volume, and it is very easy to have abnormal slag return, resulting in the inability to release gas in the borehole, and it is very easy to have a spray hole phenomenon in the high gas storage area, causing gas fluctuations or even exceeding the limit.

[0004] When compressed air is used as the slag removal medium, a large amount of coal dust or rock dust (collectively referred to as dust) is generated during the drilling process, which far exceeds the national working environment sanitation standards. Usually, the dust concentration behind the working point reaches more than 3000mg / m³, seriously polluting the working environment. The visibility is less than 5m, and the pollution range can reach hundreds of meters, which buries safety hazards for production. On the other hand, the dust generated by drilling has a high degree of dispersion, and the proportion of 2-5μm dust that is inhaled by the human body and causes pneumoconiosis is relatively high. The sedimentation rate is extremely slow, and its hydrophilicity decreases. It is extremely difficult to control after spreading to the working space. At the same time, during the pre-extraction of gas in drilling construction, some drill cuttings enter the extraction pipeline under the influence of the negative pressure of the extraction system, causing slag accumulation in the extraction system to affect the gas extraction mixing volume, and water accumulation to reduce the negative pressure of gas extraction, affecting the extraction effect. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a closed dust removal, slag discharge and anti-spray hole system buffer device and a use method thereof, so as to solve the technical problems existing in the prior art.

[0006] The technical solution adopted by the present invention is: a closed dust removal, slag discharge and anti-blowout hole system buffer device, comprising a box body, a high negative pressure pipeline interface, a low negative pressure pipeline interface and a box spray device are respectively arranged on the left and right sides of the top of the box body, the high negative pressure pipeline interface and the low negative pressure pipeline interface are respectively connected to the high negative pressure pipe and the low negative pressure pipe, a slag discharge outlet is arranged on the left side of the box body, and a dust removal device negative pressure extraction port, a hole slag discharge and slag conveying port and a sewage high-pressure water switching port are arranged on the right side from top to bottom in sequence, the dust removal device negative pressure extraction port, the hole slag discharge and slag conveying port and the sewage high-pressure water switching port are respectively connected to the dust discharge pipe of the anti-blowout hole dust collector, the slag discharge pipe and the high-pressure water pipe of the drilling rig, the anti-blowout hole dust collector is connected to the dust collecting pipe connected to the drilling rig, and also includes a slag discharge device installed at the bottom of the box body, the slag discharge device is used to discharge mud and drill cuttings at the bottom of the box body.

[0007] Furthermore, the above-mentioned slag discharge device includes a conveying screw shaft, a conveying trough and a collecting plate. The collecting plate is composed of two pieces, which are symmetrically arranged front and back at the bottom of the box body and inclined toward the middle. The conveying trough is located in the middle of the two collecting plates. The conveying screw shaft cooperates with the conveying trough and one end extends out of the slag discharge pipe. A discharge pipe with a valve is provided at the bottom of the slag discharge pipe. The two ends of the conveying screw shaft are respectively rotatably connected to the outer end of the slag discharge pipe and the side wall of the box body and one end extending out of the slag discharge pipe is connected to the pneumatic motor.

[0008] Furthermore, a guide plate is installed on the top of the box body, the guide plate is inclined to the lower left and is located on the left side of the box body spray device and can close the front and rear sides of the box body.

[0009] Furthermore, a shielding portion is provided at the lower end of the guide plate and extends horizontally to the lower left.

[0010] Furthermore, the cross section of the guide plate is an arc-shaped structure.

[0011] Furthermore, the nozzles of the box spray device are arranged in at least 2 rows, staggered toward the lower right.

[0012] Furthermore, a sealing flange is arranged on the front side of the box body, and the sealing flange is detachably and sealingly connected to a sealing disc.

[0013] A method for using a closed dust removal, slag discharge and anti-blowout hole system buffer device, the method comprising: before drilling construction, connecting a multifunctional device for storing water and slag in an extraction pipeline to a drilling construction system, that is, connecting a low negative pressure pipeline interface to a low negative pressure anti-blowout hole pipeline, and connecting a high negative pressure pipeline interface to a high negative pressure pipeline for drilling extraction, providing a negative pressure for the multifunctional device for storing water and slag in the extraction pipeline and controlling it through a valve; connecting high pressure gas and high pressure water used by the nozzle to a box spray device, and opening the valve for spraying; connecting a dust removal device to a negative pressure extraction port of the dust removal device with a hose, and connecting a slag discharge port at the orifice to a slag discharge and slag delivery port at the orifice through a hose, forming a closed management of drilling construction; closing the sewage and high pressure water switching ports, the automatic slag discharge port, and the slag discharge water port, forming a closed state of the device; installing an air motor and connecting it to the slag discharge device, and completing the drilling preparation work; After the device is connected, the dust-containing airflow after dust removal is introduced into the box through the negative pressure inlet of the dust removal device during drilling, and the drill cuttings are discharged into the box through the orifice slag discharge port. Secondary dust removal is carried out under the action of the box spray device, and the mud and drill cuttings formed fall into the collecting plate. The pneumatic motor rotates to drive the slag discharge device to remove the mud and drill cuttings. After the device is connected, the negative pressure condition in the box is changed during the drilling process by adjusting the high and low negative pressure extraction pipeline valves to ensure that the negative pressure suction volume required for compressed air drilling, slag removal, dust removal, and air flow injection meets the requirements to prevent dust and gas from spreading into the working space with the gas; After the drilling construction is completed, close the vacuum extraction port of the dust removal device, the slag discharge port at the hole, the high vacuum pipeline interface, the low vacuum pipeline interface, and the valve at the box spray device, and stop the operation of the pneumatic motor. Connect the sewage and high-pressure water switching port to the high-pressure water pipe (the valve can be opened for sewage discharge), open the slag discharge port, and remove the silt and drilling cuttings at the bottom of the box under the action of high-pressure water flushing; When the aggregate plate or guide plate inside the box fails and needs to be repaired, or when the drill cuttings (mud) at the bottom of the box solidifies and cannot be discharged under the action of high-pressure water, remove the sealing device on the front side of the box for treatment and reinstall it after the treatment is completed.

[0014] Beneficial effects of the present invention: Compared with the prior art, the present invention aims at dust control during drilling, gas escape carried by compressed air, and drilling cuttings and dust entering the extraction pipeline. By designing a buffer device, the drilling cuttings, compressed air used for slag discharge, and gas generated during the drilling construction process are uniformly sent into the buffer box for centralized treatment, thereby overcoming the difficulties of dust control, gas fluctuation, and slag accumulation and blockage in the extraction pipeline during drilling, improving the drilling management level, and creating a good working environment. The specific effects are as follows: 1) After connecting to the dust removal device used for drilling construction, use the device to provide storage space for compressed air used for slag discharge, induced air flow, steam-water two-phase spray, etc., to prevent the compressed air from carrying drilling gas to the working space during the drilling construction process to cause gas fluctuations. When the drilling hole sprays, a certain amount of gas can be stored in the box space of this device to prevent instantaneous gas outflow and cause gas over-limit accidents; 2) A conventional connection port for the low negative pressure pipeline used for drilling construction is installed above the device, and a high negative pressure pipeline connection port is also provided. When the gas outflow in the borehole is high, or the extraction negative pressure suction volume does not match the compressed air volume used for slag discharge, induced air flow, steam-water two-phase spray, etc., the negative pressure suction volume and the compressed air volume can be balanced by adjusting the high and low negative pressure valves to prevent the gas from carrying gas and spreading.

[0015] 3) A steam-water two-phase spray is installed above the device, and a guide plate is added at the high and low negative pressure extraction positions. During the drilling construction, the drill cuttings are discharged into the device through the slag discharge pipe and scattered to generate some dust. The dust-laden airflow after the drilling dust removal device cannot be completely purified, resulting in some dust entering the extraction pipeline with the gas under the action of the extraction negative pressure. The steam-water two-phase spray on the upper part of the box is used for secondary purification and dust removal, and the dust-laden airflow and the spray are fully mixed under the action of the guide plate, thereby improving the secondary purification efficiency and preventing the spray from directly entering the extraction pipeline; 4) An automatic slag discharge device is installed near the bottom of the device. The drill cuttings entering the device fall into the collecting plate. The collecting plate is at a certain angle to make the drill cuttings slide to the center for collection. A screw conveyor shaft is installed at the center of the collecting plate. A pneumatic motor is connected to one end of the screw conveyor shaft. After starting, the mud and drill cuttings in the box are automatically discharged under the condition of rotation and thrust. 5) A slag discharge outlet and sewage and high-pressure water switching ports are installed near the bottom of the device. To solve the problems that mud entering the box and drill cuttings scattered to the outside of the receiving plate cannot be automatically discharged and are difficult to clean, high-pressure water is used for flushing and the device is discharged through the slag discharge outlet to effectively protect the internal space of the box.

[0016] 6) A plugging device is installed on the front side of the device. The internal guide plate, automatic slag discharge device and internal solidified drill cuttings can be maintained by dismantling the plugging device to ensure that the device can maximize the sealing, dust removal and slag discharge functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural diagram of the buffer device of the closed dust removal, slag discharge and anti-spray hole system; Figure 2 It is a schematic diagram of the front view structure of the buffer device of the closed dust removal, slag discharge and anti-spray hole system; Figure 3 yes Figure 2 Schematic diagram of the AA section structure; Figure 4This is a left-view structural diagram of the buffer device of the closed dust removal, slag discharge and anti-spray hole system; Figure 5 yes Figure 4 Schematic diagram of the structure of the middle BB section; Figure 6 This is a three-dimensional structural diagram of the buffer device of the closed dust removal, slag discharge and anti-spray hole system (removing the left panel of the box); Figure 7 It is a schematic diagram of the installation structure of the buffer device of the closed dust removal, slag discharge and anti-spray hole system. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with specific embodiments.

[0019] Example 1: Figure 1-7 As shown, a closed dust removal, slag discharge and anti-blowout hole system buffer device comprises a box body 1, a high negative pressure pipeline interface 2, a low negative pressure pipeline interface 3 and a box spray device 4 are respectively arranged on the left and right sides of the top of the box body 1, the high negative pressure pipeline interface 2 and the low negative pressure pipeline interface 3 are respectively connected to the high negative pressure pipe 9 and the low negative pressure pipe 10, a slag discharge and water outlet 5 is arranged on the left side of the box body 1, and a dust removal device negative pressure extraction port 6, a hole slag discharge and slag conveying port 7 and a sewage high-pressure water switching port 8 are arranged on the right side from top to bottom in sequence, the dust removal device negative pressure extraction port 6, the hole slag discharge and slag conveying port 7 and the sewage high-pressure water switching port 8 are respectively connected to the dust discharge pipe 11 of the anti-blowout hole dust collector, the slag discharge pipe and the high-pressure water pipe of the drilling rig, the anti-blowout hole dust collector is connected to the dust collecting pipe connected to the drilling rig, and also includes a slag discharge device 12 installed at the bottom of the box body 1, the slag discharge device 12 is used to discharge mud and drill cuttings at the bottom of the box body 1.

[0020] Furthermore, the above-mentioned slag discharge device 12 includes a conveying screw shaft 1201, a conveying trough 1202 and a collecting plate 1203. The collecting plate 1203 is composed of two pieces, which are symmetrically arranged at the bottom of the box body 1 and inclined toward the middle. The conveying trough 1202 is located in the middle of the two collecting plates 1203. The conveying screw shaft 1201 cooperates with the conveying trough 1202 and one end extends out of the slag discharge pipe 1204. A discharge pipe 1205 is arranged at the bottom of the slag discharge pipe 1204. Both ends of the conveying screw shaft 1201 are respectively rotatably connected to the outer end of the slag discharge pipe 1204 and the side wall of the box body 1 and one end extending out of the slag discharge pipe 1204 is connected to the pneumatic motor 1205. The pneumatic motor 1205 is installed on the pneumatic motor 1205 through a frame.

[0021] The guide plate can block the sprayed dust or wetted mud from falling into the bottom and also avoid entering the negative pressure pipe. A guide plate 13 is installed on the top of the box 1. The guide plate 13 is inclined to the lower left and is located on the left side of the box spray device 4 and can close the front and back sides of the box 1. The inclined guide plate is convenient for blocking the sprayed dust or wetted mud from falling into the slag discharge device at the bottom of the box. The thin plate with an inclined structure has an elastic buffering effect, which increases the service life of the guide plate.

[0022] In order to further reduce the possibility of dust and mud entering the negative pressure pipe, a shielding portion 14 is provided at the lower end of the guide plate 13 and extends horizontally to the lower left. On the one hand, it reduces the inlet gap between the airflow and the negative pressure pipe. On the other hand, the inclined structure is also more conducive to further shielding dust and mud from falling.

[0023] In order to further achieve elastic buffering and flow collection, the cross section of the guide plate 13 is an arc-shaped structure.

[0024] In order to improve the spray effect, the box spray device 4 adopts a water vapor spray device, and its nozzles are arranged in at least 2 rows, which are staggered toward the lower right. The staggered spray can increase the possibility of dust entering and being wetted into mud by the spray, thereby achieving a better dust removal effect.

[0025] In order to facilitate the cleaning and replacement of the internal guide plate and the cleaning of the internal mud, a sealing flange 15 is provided on the front side of the box body 1. The sealing flange 15 is detachably sealed and connected to a sealing disc 16. By removing the sealing disc, the internal guide plate can be cleaned and replaced, and the internal mud can be cleaned in case of blockage.

[0026] Embodiment 2: A method for using a closed dust removal, slag discharge and anti-blowout hole system buffer device, the method comprising: before drilling construction, connecting the multifunctional device for storing water and slag in the extraction pipeline to the drilling construction system, that is, connecting the low negative pressure pipeline interface to the low negative pressure anti-blowout hole pipeline, and connecting the high negative pressure pipeline interface to the drilling extraction high negative pressure pipeline, providing the multifunctional device for storing water and slag in the extraction pipeline with a negative pressure for extraction and controlling it through a valve; connecting the high pressure gas and high pressure water used by the nozzle to the box spray device, and opening the valve for spraying; connecting the dust removal device to the negative pressure extraction port of the dust removal device with a hose, and connecting the orifice discharge port of the drilling rig to the orifice discharge port through a hose, so as to form a closed management of the drilling construction; closing the sewage, high pressure water switching port, automatic discharge port and discharge port to form a closed state of the device; installing an air motor and connecting it to the discharge device to complete the drilling preparation work; After the device is connected, the dust-containing airflow after dust removal is introduced into the box through the negative pressure inlet of the dust removal device during drilling, and the drill cuttings are discharged into the box through the orifice slag discharge port. Secondary dust removal is carried out under the action of the box spray device, and the mud and drill cuttings formed fall into the collecting plate. The pneumatic motor rotates to drive the slag discharge device to remove the mud and drill cuttings. After the device is connected, the negative pressure condition in the box is changed during the drilling process by adjusting the high and low negative pressure extraction pipeline valves to ensure that the negative pressure suction volume required for compressed air drilling, slag removal, dust removal, and air flow injection meets the requirements to prevent dust and gas from spreading into the working space with the gas; After the drilling construction is completed, close the vacuum extraction port of the dust removal device, the slag discharge port at the hole, the high vacuum pipeline interface, the low vacuum pipeline interface, and the valve at the box spray device, and stop the operation of the pneumatic motor. Connect the sewage and high-pressure water switching port to the high-pressure water pipe (the valve can be opened for sewage discharge), open the slag discharge port, and remove the silt and drilling cuttings at the bottom of the box under the action of high-pressure water flushing; When the aggregate plate or guide plate inside the box fails and needs to be repaired, or when the drill cuttings (mud) at the bottom of the box solidifies and cannot be discharged under the action of high-pressure water, remove the sealing device on the front side of the box for treatment and reinstall it after the treatment is completed.

[0027] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A closed dust removal and slag discharge anti-spray hole system buffer device, Features: The invention comprises a box body (1), wherein a high negative pressure pipeline interface (2) and a low negative pressure pipeline interface (3) and a box body spray device (4) are respectively arranged on the left and right sides of the top of the box body (1), the high negative pressure pipeline interface (2) and the low negative pressure pipeline interface (3) are respectively connected to the high negative pressure pipe (9) and the low negative pressure pipe (10), a slag discharge outlet (5) is arranged on the left side of the box body (1), and a dust removal device negative pressure extraction port (6), a hole slag discharge and slag delivery port (7) and a sewage high pressure water switching port (8) are arranged in sequence from top to bottom on the right side, the dust removal device negative pressure extraction port (6), the hole slag discharge and slag delivery port (7) and the sewage high pressure water switching port (8) are respectively connected to the dust discharge pipe (11) of the anti-blowout hole dust collector, the slag discharge pipe and the high pressure water pipe of the drilling rig, the anti-blowout hole dust collector is connected to the dust collecting pipe connected to the drilling rig, and the invention also comprises a slag discharge device (12) installed at the bottom of the box body (1), the slag discharge device (12) is used to discharge mud and drill cuttings at the bottom of the box body (1).

2. A closed dust removal and slag discharge anti-spray hole system buffer device according to claim 1, Features: The slag discharge device (12) comprises a conveying screw shaft (1201), a conveying trough (1202) and a collecting plate (1203). Two collecting plates (1203) are used and are symmetrically arranged at the bottom of the box body (1) and inclined toward the middle. The conveying trough (1202) is located in the middle of the two collecting plates (1203). The conveying screw shaft (1201) cooperates with the conveying trough (1202) and one end extends out of the slag discharge pipe (1204). A discharge pipe with a valve is provided at the bottom of the slag discharge pipe (1204). Two ends of the conveying screw shaft (1201) are respectively rotatably connected to the outer end of the slag discharge pipe (1204) and the side wall of the box body (1), and one end extending out of the slag discharge pipe (1204) is connected to a pneumatic motor.

3. A closed dust removal and slag discharge anti-spray hole system buffer device according to claim 1 or 2, Features: A guide plate (13) is installed on the top of the box body (1). The guide plate (13) is inclined downward to the left and is located on the left side of the box body spray device (4) and is capable of closing the front and rear sides of the box body (1).

4. A closed dust removal and slag discharge anti-spray hole system buffer device according to claim 3, Features: A shielding portion (14) is provided at the lower end of the guide plate (13) and extends horizontally to the lower left.

5. A closed dust removal and slag discharge anti-spray hole system buffer device according to claim 3, Features: The cross section of the guide plate (13) is an arc-shaped structure.

6. A closed dust removal and slag discharge anti-spray hole system buffer device according to claim 1, Features: The nozzles of the box spray device (4) are arranged in at least two rows and staggered toward the lower right.

7. A closed dust removal and slag discharge anti-spray hole system buffer device according to claim 1, Features: A sealing flange (15) is provided on the front side of the box body (1), and the sealing flange (15) is detachably sealed and connected to a sealing disc (16).

8. A method for using a closed dust removal and slag discharge anti-spray hole system buffer device according to claim 1, Features: The method is as follows: before drilling construction, the multifunctional device for storing water and slag in the extraction pipeline is connected to the drilling construction system, that is, the low negative pressure pipeline interface is connected to the low negative pressure anti-blowout hole pipeline, and the high negative pressure pipeline interface is connected to the high negative pressure pipeline of the drilling extraction, so as to provide the multifunctional device for storing water and slag in the extraction pipeline with negative pressure for extraction and control it through a valve; the high pressure gas and high pressure water used by the nozzle are connected to the box spray device, and the valve is opened for spraying; the dust removal device is connected to the negative pressure extraction port of the dust removal device with a hose, and the orifice slag discharge of the drilling rig is connected to the orifice slag discharge and slag delivery port through a hose, so as to form a closed management of the drilling construction; the sewage and high pressure water switching ports, the automatic slag discharge port, and the slag discharge water port are closed to form a closed state of the device; an air motor is installed and connected to the slag discharge device to complete the drilling preparation work; After the device is connected, the dust-containing airflow after dust removal is introduced into the box through the negative pressure inlet of the dust removal device during drilling, and the drill cuttings are discharged into the box through the orifice slag discharge port. Secondary dust removal is carried out under the action of the box spray device, and the mud and drill cuttings formed fall into the collecting plate. The pneumatic motor rotates to drive the slag discharge device to remove the mud and drill cuttings. After the device is connected, the negative pressure condition in the box can be changed by adjusting the high and low negative pressure extraction pipeline valves during the drilling process to ensure that the negative pressure suction volume required for compressed air drilling, slag removal, dust removal, and airflow injection meets the requirements; After the drilling construction is completed, close the negative pressure extraction port of the dust removal device, the slag discharge port at the hole, the high negative pressure pipeline interface, the low negative pressure pipeline interface, and the valve at the box spray device, and stop the operation of the pneumatic motor. Connect the sewage and high-pressure water switch port to the high-pressure water pipe, open the slag discharge port, and remove the silt and drilling cuttings at the bottom of the box under the action of high-pressure water flushing; When the aggregate plate or guide plate inside the box fails and needs to be repaired, or when the drill cuttings at the bottom of the box solidify and cannot be discharged under the action of high-pressure water, remove the sealing device on the front side of the box for treatment and reinstall it after the treatment is completed.

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