Explosion-proof blast hole slag removal and gas concentration monitoring integrated device

Abstract

The invention relates to the technical field of mining equipment, and discloses an explosion-proof blast hole slag removal and gas concentration monitoring integrated device which comprises a slag discharge pipe, a gas injection pipe, a gas guide pipe installed at the lower end of the gas injection pipe, a gas concentration sensor probe installed on one side of the gas guide pipe and a flow dividing assembly. The gas guide pipe is composed of a flow collecting cover and a flow guide cover, a flow dividing channel and a flow collecting channel are formed in the gas guide pipe, the slag discharging pipe is sleeved with the gas injection pipe and connected with the upper end of the flow collecting cover, compressed gas flow in the gas injection pipe passes through the flow dividing channel, then carries rock slag from the lower end of the flow collecting cover, enters the flow collecting channel and is discharged out of the slag discharging pipe, and the turbulent flow assembly is installed in the flow guide cover. According to the explosion-proof blast hole slag removal and gas concentration monitoring integrated device, by controlling the air pressure of the compressed gas and the diameter of the exhaust hole, the effect of increasing the speed of the airflow again is achieved, the airflow can carry large-particle rock slag to be discharged, and the effect of efficiently removing slag in a blast hole is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of mining equipment, in particular to an explosion-proof blasthole slag cleaning and gas concentration monitoring integrated device. Background Art

[0002] Blast hole cleaning is a key process in blasting operations such as mining, tunneling, and geotechnical engineering. It is mainly used to remove rock powder, debris, mud, or accumulated water remaining after drilling is completed, to ensure that the explosives are loaded in place, the blasting effect is controllable, and to ensure operational safety. Its core functions include ensuring the quality of charging: preventing rock powder from clogging the blast hole, ensuring even distribution of explosives, and removing accumulated water in the hole to prevent the explosives from becoming ineffective due to moisture, reducing safety risks, and reducing the threat of pumice at the hole mouth and debris in the hole to subsequent charging personnel. Common hole cleaning methods usually use mechanical cleaning methods, using a spiral hole cleaner to penetrate into the bottom of the hole to remove the rock debris remaining at the bottom. However, this method will leave a lot of rock debris on the hole wall, and the equipment is large and not easy to move. Therefore, the preferred method is to directly blow compressed gas and directly insert the high-pressure pipe into the blast hole. In the process of exhaust, high-speed airflow of compressed gas is used to discharge the rock debris at the bottom of the hole. However, this method can be applied to shallow holes (within 10m) with small apertures (within 100mm). It cannot effectively remove the debris from deep holes (10m-25m) with large apertures (above 150mm). This is mainly because the aperture is large and the air flow speed is reduced during exhaust. In addition, there is also an operation method using negative pressure adsorption, which is also not suitable for deep hole extraction and drainage. The bottom feed port is prone to clogging during extraction, and it also has extremely high requirements on the power of the extraction equipment.

[0003] In view of the above technical problems existing in cleaning blastholes, the explosion-proof blasthole slag cleaning and gas concentration monitoring integrated device provided by the present invention is mainly used to solve the problem that when using air blowing to clean rock debris, due to the large diameter of the blasthole, the speed of the compressed air flow when discharged is low, and only the rock debris particles with smaller particle size can be cleaned. The larger particles of rock debris cannot be discharged from the blasthole due to the reduced air flow speed. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In response to the shortcomings of the existing technology, the present invention provides an integrated explosion-proof blasthole slag cleaning and gas concentration monitoring device, which solves the problem that when using air blowing to clean rock debris, due to the large diameter of the blasthole, the speed of the compressed air flow when discharged is low, and only rock debris particles with smaller particle sizes can be cleaned.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solution: an explosion-proof blasthole slag cleaning and gas concentration monitoring integrated device, comprising a slag discharge pipe, a gas injection pipe, a gas guide pipe installed at the lower end of the gas injection pipe, and a gas concentration sensor probe installed on one side of the gas guide pipe, and further comprising:

[0008] The flow diversion assembly is composed of a collecting cover and a guide cover, and forms a diversion channel and a collecting channel in the air guide pipe. The slag discharge pipe is sleeved in the air injection pipe and connected to the upper end of the collecting cover. The compressed air in the air injection pipe passes through the diversion channel and then enters the collecting channel from the lower end of the collecting cover, carrying rock slag and is discharged from the slag discharge pipe.

[0009] A spoiler assembly is installed in the guide cover, and is used to mix the rock debris in the blasthole with the compressed air flow to form dust that enters the collecting channel. At the same time, the spoiler assembly can be used to assist the diversion assembly in forming a pulsed airflow;

[0010] A fixing assembly is installed on the outside of the gas pipe and uses multiple synchronously retractable arms to fix the gas pipe in the blasthole during slag cleaning;

[0011] The airtight structure is installed on the wall of the gas pipe and is used to seal and maintain pressure between the gas pipe and the blast hole.

[0012] As a further description of the above technical solution, the diversion assembly is composed of a flow guide cover, a collecting cover and an air guide pipe, which are connected in sequence from the inside out. The upper end of the air guide pipe is provided with a bundle mouth portion connected to the main air pipe, and the lower end of the air guide pipe is provided with a flared portion matching the diameter of the blasthole. The upper end of the collecting cover is a conical structure and is provided with a connecting portion connected to the slag discharge pipe. The lower end of the collecting cover is provided with a bell mouth matching the flared portion. The side wall of the collecting cover is fixedly connected to a plurality of connecting blocks with threaded holes along the circumferential direction, and the side wall of the air guide pipe is connected to the plurality of connecting blocks by bolts.

[0013] The deflector cover is a shuttle-shaped structure, and the lower end thereof is fixed to the bell mouth of the collecting cover through a bracket.

[0014] As a further description of the above technical solution, the spoiler assembly includes a fixed plate, a side wall of the fixed plate is provided with a plurality of circular holes, a hollow shaft is rotatably connected between the air guide cover and the fixed plate through a sealed bearing, the side wall of the hollow shaft is fixedly connected to the spoiler assembly, the lower end of the hollow shaft is fixedly connected to a spoiler blade, the upper end of the fixed plate is fixedly connected to a first motor, and the output end of the first motor is fixedly connected to the upper end of the hollow shaft;

[0015] The upper end of the collecting cover is connected with a plurality of fixing bolts with holes through circular holes, the side wall of the guide cover is fixedly connected to the fixing bolts through threaded holes, the shaft wall of the hollow shaft is provided with two air inlet holes located inside the guide cover, and the shaft wall of the hollow shaft is provided with two air outlet holes located outside the guide cover for providing compressed gas to the spoiler assembly, and the spoiler assembly is arranged at the lower end of the air guide pipe and the collecting cover.

[0016] As a further description of the above technical solution, the spoiler assembly includes an air distribution plate, which is a hollow structure. Two guide holes that match the air outlet holes are opened on the inner side of the air distribution plate. A plurality of spoiler tubes are fixedly connected to the circumference of the air distribution plate at an angle, and the circumference of the air distribution plate is connected to the spoiler tube by setting air holes. The plurality of spoiler tubes are fixedly connected to an air distribution ring, and the air distribution ring is sleeved on the diversion channel between the air guide tube and the collecting cover;

[0017] The spoiler tube is a rectangular structure, and a plurality of radiation holes are provided on the four side walls thereof. A spoiler plate with a triangular structure is fixedly connected to the tube wall of the spoiler tube.

[0018] As a further description of the above technical solution, a circular ring in contact with the upper end of the air distribution ring is provided in the diversion channel, the inner side of the circular ring is fixed to the lower end of the collecting cover, the side wall of the air guide pipe is fixedly connected to the side wall of the fixing ring by bolts, and a plurality of vertically arranged diversion holes are opened through the side wall of the circular ring, a plurality of inverted Y-shaped air distribution grooves are opened on the inner side of the air distribution ring, and a plurality of L-shaped air distribution holes are opened on the air distribution ring, and the air distribution holes and the air distribution grooves are staggered.

[0019] As a further description of the above technical solution, the spoiler blade is provided with multiple spoiler parts, each of which is provided with an upward bending part and a downward inclined part, and the lower end of the inclined part is lower than the lower end of the air guide tube.

[0020] Preferably, the fixing assembly includes a fixing cover, the fixing cover is sleeved on the side wall of the air duct and fixed by bolts, a plurality of rotating shafts are rotatably connected to the fixing cover through a bearing seat, a plurality of support arms are respectively fixed to the plurality of rotating shafts in groups of two, a plurality of strip-shaped holes matching the support arms are opened on the side wall of the fixing cover, a second motor is fixedly connected to the inner side of the fixing cover, a worm is fixedly connected to the output end of the second motor, a worm is meshed with a worm wheel on the worm, and the worm wheel is fixedly connected to the upper end of one of the rotating shafts;

[0021] A synchronous belt with teeth on the inner side is arranged in the fixed cover, and a plurality of synchronous pulleys with teeth are wound around the inner side of the synchronous belt. The plurality of synchronous pulleys are respectively fixed on the shaft walls of the plurality of rotating shafts.

[0022] As a further description of the above technical solution, the airtight structure includes a connecting cover, and a rubber tube is fixedly connected between the side wall of the connecting cover and the side wall of the air guide pipe through a clamp. A high-pressure air pipe is fixedly connected to one side of the connecting cover, and one end of the high-pressure air pipe passes through the air guide pipe and extends into the air injection pipe.

[0023] As a further description of the above technical solution, the upper end of the gas injection pipe is fixedly connected to an end cap, and a gas injection joint connected to the gas source is fixed on one side of the end cap. The upper end of the slag discharge pipe passes through the top of the end cap, and the connection is sealed.

[0024] As a further description of the above technical solution, multiple annular rubber frames need to be configured in the air injection pipe. The multiple annular rubber frames are arranged at intervals according to the length of the air injection pipe. The outer side of the annular rubber frame is interference fit with the inner side of the air injection pipe. The inner side of the annular rubber frame is provided with multiple fixing parts for fixing pipes, signal lines and cables.

[0025] (3) Beneficial effects

[0026] Compared with the prior art, the present invention provides an integrated explosion-proof blasthole slag cleaning and gas concentration monitoring device, which has the following beneficial effects:

[0027] This solution can solve the problem in the prior art of using air blowing to clean rock debris in large-caliber blastholes. Due to the large diameter of the blasthole, the speed of the compressed air flow when discharged is low, and only rock debris particles with smaller particle sizes can be cleaned. Larger rock debris particles cannot be discharged from the blasthole due to the reduced air flow speed. It mainly uses pressurized air injection through the air injection pipe, and reduces the air flow passage area at the exhaust end through the diverter component at the lower end. Under the condition of constant pressure, the air flow can be accelerated again in the small-caliber slag discharge pipe, so that the air flow can entrain larger particles of rock debris for discharge, thereby improving the effect of efficient slag cleaning in the blasthole.

[0028] By using large-diameter pipes for pressurized air injection and small-diameter pipes to increase the exhaust speed, the airflow in the large-diameter gun barrel can be accelerated, and the acceleration part is on the surface of the rock chips at the bottom of the hole, so that the airflow can carry away the rock chips and discharge them quickly. At the same time, the airflow can stir the rock chips at the bottom of the hole, and a pulse airflow can be formed to cause the rock chips to form dust before entering the slag discharge pipe, avoiding rock chips from clogging in the slag discharge pipe, thereby improving the efficiency and reliability of slag cleaning. At the same time, the gas concentration sensor probe is arranged in a way that reaches the bottom of the hole directly, and the gas concentration in the bottom of the hole is monitored in real time by the probe, thereby improving the safety of slag cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic structural diagram of the explosion-proof blasthole slag cleaning and gas concentration monitoring integrated device proposed by the present invention;

[0030] Figure 2 This is a cross-sectional view of the explosion-proof blasthole slag cleaning and gas concentration monitoring integrated device proposed by the present invention;

[0031] Figure 3 This is a schematic structural diagram of the gas guide pipe, the flow collecting cover and the flow guide cover in the explosion-proof blasthole slag cleaning and gas concentration monitoring integrated device proposed by the present invention;

[0032] Figure 4 This is a schematic structural diagram of the end cap in the explosion-proof blasthole slag cleaning and gas concentration monitoring integrated device proposed by the present invention;

[0033] Figure 5 This is a schematic structural diagram of the flow disturbance component in the explosion-proof blasthole slag cleaning and gas concentration monitoring integrated device proposed by the present invention;

[0034] Figure 6 This is a schematic structural diagram of the gas distribution plate, hollow shaft and spoiler tube in the explosion-proof blasthole slag cleaning and gas concentration monitoring integrated device proposed by the present invention;

[0035] Figure 7 This is a schematic diagram of the structure of the spoiler blades in the explosion-proof blasthole slag cleaning and gas concentration monitoring integrated device proposed by the present invention;

[0036] Figure 8 This is a schematic diagram of the structure of the fixed components in the fixed cover of the explosion-proof blasthole slag cleaning and gas concentration monitoring integrated device proposed by the present invention;

[0037] Figure 9 This is a schematic structural diagram of the gas distribution ring and the circular ring in the explosion-proof blasthole slag cleaning and gas concentration monitoring integrated device proposed by the present invention;

[0038] Figure 10 This is a schematic structural diagram of the gas guide pipe in the explosion-proof blasthole slag cleaning and gas concentration monitoring integrated device proposed by the present invention;

[0039] Figure 11 This is a schematic structural diagram of the collecting cover in the explosion-proof blasthole slag cleaning and gas concentration monitoring integrated device proposed by the present invention;

[0040] Figure 12 This is a schematic structural diagram of the flow guide cover of the explosion-proof blasthole slag cleaning and gas concentration monitoring integrated device proposed by the present invention;

[0041] Figure 13 This is a rendering of the explosion-proof blasthole slag cleaning and gas concentration monitoring integrated device proposed by the present invention in a blasthole;

[0042] Figure 14 This is a structural schematic diagram of the connection between the explosion-proof blasthole slag cleaning and gas concentration monitoring integrated device proposed by the present invention and external energy supply equipment.

[0043] In the figure: 1, flaring part; 2, rubber tube; 3, connecting cover; 4, fixing cover; 5, constricting part; 6, air injection pipe; 7, high-pressure air pipe; 8, slag discharge pipe; 9, air injection joint; 10, end cap; 11, strip hole; 12, diverter hole; 13, support arm; 14, rotating shaft; 15, air guide pipe; 16, collecting cover; 17, guide cover; 18, circular ring; 19, air distribution ring; 20, spoiler blade; 21 , spoiler tube; 22. Hollow shaft; 23. Fixed plate; 24. First motor; 25. Fixed bolt; 26. Second motor; 27. Gas concentration sensor probe; 28. Annular rubber frame; 29. ​​Spoiler; 30. Air distribution groove; 31. Air distribution disc; 32. Bending part; 33. Synchronous pulley; 34. Worm; 35. Worm wheel; 36. Synchronous belt; 37. Air distribution hole; 38. Inclined part. DETAILED DESCRIPTION

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0045] like Figures 1-14 The present invention provides an integrated explosion-proof blasthole slag cleaning and gas concentration monitoring device, comprising a slag discharge pipe 8, an air injection pipe 6, an air guide pipe 15 installed at the lower end of the air injection pipe 6, and a gas concentration sensor probe 27 installed on one side of the air guide pipe 15, and further comprising:

[0046] The flow diversion assembly is composed of a collecting cover 16 and a guide cover 17, and forms a diversion channel and a collecting channel in the air guide pipe 15. The slag discharge pipe 8 is sleeved in the air injection pipe 6 and connected to the upper end of the collecting cover 16. The compressed air in the air injection pipe 6 passes through the diversion channel and then enters the collecting channel from the lower end of the collecting cover 16, carrying rock slag and is discharged from the slag discharge pipe 8.

[0047] The spoiler assembly is installed in the guide cover 17. The spoiler assembly is used to mix the rock debris in the blasthole with the compressed air flow to form dust that enters the collecting channel. At the same time, the spoiler assembly can be used to assist the diversion assembly in forming a pulsed airflow;

[0048] The fixing assembly is installed on the outside of the air guide tube 15, and uses multiple synchronously telescopic support arms 13 to fix the air guide tube 15 in the blast hole during slag cleaning;

[0049] The airtight structure is installed on the wall of the gas pipe 15 and is used to seal and maintain pressure between the gas pipe 15 and the blast hole.

[0050] This solution can solve the problem in the prior art of using air blowing to clean rock debris in large-caliber blastholes. Due to the large diameter of the blasthole, the speed of the compressed air flow when discharged is low, and only the rock debris particles with smaller particle sizes can be cleaned. The larger particles of rock debris cannot be discharged from the blasthole due to the reduced air flow speed. The solution mainly uses pressurized air injection through the air injection pipe 6, and reduces the air flow passage area at the exhaust end through the diverter component at the lower end. Under the condition of unchanged pressure, the air flow can be accelerated again in the small-caliber slag discharge pipe 8, so that the air flow can entrain larger particles of rock debris for discharge, thereby improving the effect of efficient slag cleaning in the blasthole.

[0051] Specifically, the air injection pipe 6 and the slag discharge pipe 8 cooperate with each other to achieve pressurized air injection through a large-diameter pipe and increased exhaust speed through a small-diameter pipe, thereby achieving an acceleration effect on the airflow in the large-diameter gun barrel, and the acceleration part is on the surface of the rock chips at the bottom of the hole, so that the airflow can carry away the rock chips and discharge them quickly. At the same time, the airflow can stir the rock chips at the bottom of the hole, and a pulse airflow can be formed to cause the rock chips to form dust before entering the slag discharge pipe 8, thereby avoiding rock chips from being blocked in the slag discharge pipe 8, thereby improving the efficiency and reliability of slag cleaning. At the same time, the gas concentration sensor probe 27 is arranged in a way that reaches the bottom of the hole directly, and the probe is used to monitor the gas concentration in the bottom of the hole in real time, thereby improving the safety of slag cleaning.

[0052] The details of the above technical solution are as follows: Figure 2 and Figure 3 As shown, the diversion assembly is composed of a guide cover 17, a collecting cover 16 and an air guide pipe 15 that are sequentially connected from the inside out. A diversion channel that can discharge gas along the circumferential direction is formed between the air guide pipe 15 and the collecting cover 16. The gap of the diversion channel is in the range of 1-1.5 cm. A collecting channel is formed between the collecting cover 16 and the guide cover 17. The gap of the collecting channel is in the range of 0.5-0.8 cm. The upper end of the air guide pipe 15 is provided with a bundle portion 5 connected to the main air pipe. The lower end of the tube 15 is provided with a flared portion 1 that matches the diameter of the blast hole. The upper end of the collecting cover 16 is a conical structure and is provided with a connecting portion connected to the slag discharge pipe 8. The lower end of the collecting cover 16 is provided with a bell mouth that matches the flared portion 1. The side wall of the collecting cover 16 is fixedly connected to a plurality of connecting blocks with threaded holes along the circumferential direction. The side wall of the air guide pipe 15 is connected to the plurality of connecting blocks by bolts. The guide cover 17 is a shuttle-shaped structure, and its lower end is fixed to the bell mouth of the collecting cover 16 by a bracket.

[0053] Taking the 250mm diameter blasting hole commonly used in open-pit mines as an example, the outer diameter of the lower end of the collecting cover 16 can be designed to be 2-22cm, reserving a certain amount so that the equipment can smoothly reach the surface of the rock cuttings at the bottom of the hole, so as to adapt to the 250mm blast hole commonly used in open-pit mines. The air injection pipe 6 and the slag discharge pipe 8 can both use a hose with a reinforced steel wire inside, which will not deform under an air pressure of 1.5MPa. The diameter of the slag discharge pipe 8 is in the range of 2-3cm, and the diameter of the air injection pipe is in the range of 8-10cm.

[0054] The above technical solution can be adapted to blastholes within the range of 120 mm to 400 mm by configuring multiple diversion components with different diameters. The gas injection pipe 6 and the slag discharge pipe 8 adopt a unified and universal diameter.

[0055] The details of the above technical solution are as follows: Figure 5-Figure 7 As shown, the spoiler assembly includes a fixed plate 23, the side wall of the fixed plate 23 is provided with a plurality of circular holes, a hollow shaft 22 is rotatably connected between the air guide cover 17 and the fixed plate 23 through a sealed bearing, the side wall of the hollow shaft 22 is fixedly connected to the spoiler assembly, the lower end of the hollow shaft 22 is fixedly connected to the spoiler blade 20, the spoiler blade 20 is provided with a plurality of spoilers, wherein each spoiler is provided with an upward bending portion 32 and a downward inclined portion 38, the lower end of the inclined portion 38 is lower than the lower end of the air guide tube 15, the upper end of the fixed plate 23 is fixedly connected to the first motor 24, and the output end of the first motor 24 is fixedly connected to the upper end of the hollow shaft 22;

[0056] The upper end of the collecting cover 16 is connected with a plurality of fixing bolts 25 with holes through a circular hole, and the side wall of the guide cover 17 is fixedly connected to the fixing bolts 25 through a threaded hole. Two air inlet holes are opened on the shaft wall of the hollow shaft 22, and two air outlet holes for providing compressed gas to the spoiler assembly are opened on the shaft wall of the hollow shaft 22 outside the guide cover 17. The spoiler assembly is arranged at the lower end of the air guide pipe 15 and the collecting cover 16.

[0057] The advantage of this technical solution is that the first motor 24 drives the spoiler assembly to stir the rock chips at the bottom of the blasthole, so that the deposited rock chips can be mixed with the air flow to form dust, and the spoiler assembly has an exhaust function that generates pulsed airflow, so that the airflow is blown irregularly to the rock chips at the bottom of the hole, and under the stirring of the spoiler blades, the rock chips far away from the air outlet position can be stirred and mixed with the air flow to form dust, and the dust airflow can then enter the collecting channel and be discharged from the slag discharge pipe 8.

[0058] Furthermore, the spoiler assembly used in the above scheme includes an air distribution disc 31, which is a hollow structure. Two guide holes that match the air outlet holes are opened on the inner side of the air distribution disc 31. A plurality of spoiler tubes 21 are fixedly connected to the peripheral side of the air distribution disc 31 at an angle, and the peripheral side of the air distribution disc 31 is connected to the spoiler tube 21 by setting air holes. The plurality of spoiler tubes 21 are fixedly connected to the air distribution ring 19. The air distribution ring 19 is sleeved on the diversion channel between the air guide tube 15 and the collecting cover 16. The spoiler tube 21 is a rectangular structure and has a plurality of radiation holes on its four side walls. A spoiler plate 29 with a triangular structure is fixedly connected to the tube wall of the spoiler tube 21.

[0059] When the first motor 24 drives the hollow shaft 22 to rotate the gas distribution disk 31, the gas distribution disk 31 drives the multiple spoiler tubes 21 to rotate. At this time, the gas in the diversion channel enters the guide cover 17 through the fixing bolts 25 with holes. At this time, the gas enters from the air outlet on the hollow shaft 22 and is discharged from the air outlet to the gas distribution disk 31. After being diverted by the gas distribution disk 31, it is evenly discharged from the multiple radiation holes on the spoiler tube 21. In this way, the rock chips stirred by the spoiler blades 20 can be mixed with the radiated airflow.

[0060] In order to clean the wet rock cuttings, pulse airflow can be further applied to the surface of the rock cuttings. Compared with the traditional pulse airflow applied at the gas source end, when the blast hole is deep (15m-20m), the impact force of the pulse airflow is greatly reduced when the pulse airflow reaches the bottom of the hole. The solution here is to set a circular ring 18 in the diversion channel that contacts the upper end of the gas distribution ring 19. The inner side of the circular ring 18 is fixed to the lower end of the collecting cover 16. The side wall of the air guide tube 15 is fixedly connected to the side wall of the fixing ring by bolts. A plurality of vertically arranged diversion holes 12 are opened through the side wall of the circular ring 18, and a plurality of inverted Y-shaped gas distribution grooves 30 are opened on the inner side of the gas distribution ring 19, and a plurality of L-shaped gas distribution holes 37 are opened on the gas distribution ring 19, and the gas distribution holes 37 and the gas distribution grooves 30 are staggered.

[0061] like Figure 9 As shown, the circular ring 18 is a component connecting the collecting cover 16 and the air guide pipe 15, and a plurality of diversion holes 12 are vertically opened on its surface. When the air distribution ring 19 rotates to the notch of the air distribution groove 30, the single air flow is divided into two streams, and the two air flows can be discharged from the corners of the air distribution ring 19. When the air distribution ring 19 rotates to the air distribution hole 37, the air flow is reversed and hits the center of the collecting cover 16, and the area between the air distribution hole 37 and the air distribution groove 30 on the air distribution ring 19 is not exhausted. Therefore, during the alternating process, a brief gas stoppage phenomenon will occur, so that a pulse airflow can be directly formed at the part in contact with the rock chips, which is better than the traditional method of using an electronic pulse valve to control the air intake.

[0062] The details of the above technical solution are as follows: Figure 8 As shown, the fixing assembly includes a fixing cover 4, which is sleeved on the side wall of the air guide tube 15 and fixed by bolts. A plurality of rotating shafts 14 are rotatably connected to the fixing cover 4 through a bearing seat. A plurality of support arms 13 are fixed on the plurality of rotating shafts 14 in groups of two. The number of support arms 13 is set to 8, which can form 8 contact points with the hole wall of the blasthole. The side wall of the fixing cover 4 is provided with a plurality of strip holes 11 that cooperate with the support arms 13. A second motor 26 is fixedly connected to the inner side of the fixing cover 4, and a worm 34 is fixedly connected to the output end of the second motor 26. The worm 34 is meshed with a worm gear 35, and the worm gear 35 is fixedly connected to the upper end of one of the rotating shafts 14. A synchronous belt 36 with inner teeth is provided in the fixing cover 4, and a plurality of toothed synchronous pulleys 33 are wound around the inner side of the synchronous belt 36. The plurality of synchronous pulleys 33 are respectively fixed on the shaft walls of the plurality of rotating shafts 14.

[0063] The second motor 26 drives the worm 34 to rotate the worm wheel 35. When the worm wheel 35 rotates, it drives the rotating shaft 14 to rotate. When the rotating shaft 14 rotates, it drives the support arm 13 to swing and contact the wall of the blast hole. Moreover, through the synchronous transmission action of the synchronous pulley 22 and the synchronous belt 36, the four rotating shafts 14 can rotate at the same speed and in the same direction.

[0064] The details of the above technical solution are as follows: Figure 2 and- Figure 3 As shown, as the core structure of the present technical solution, in order to enable the compressed gas to be reversed in the blasthole, it is necessary to achieve sealing between the device and the hole. The technical solution adopted is that the airtight structure includes a connecting cover 3, and the side wall of the connecting cover 3 and the side wall of the air guide pipe 15 are fixedly connected with a rubber tube 2 through a clamp. One side of the connecting cover 3 is fixedly connected with a high-pressure air pipe 7, and one end of the high-pressure air pipe 7 passes through the air guide pipe 15 and extends into the air injection pipe 6. The gas is directly transported into the rubber tube 2 through the high-pressure air pipe 7. When the air pressure increases, the rubber tube 2 expands and contacts the blasthole. At this time, a sealed space can be formed, so that the compressed gas transported in the air injection pipe 6 can only be discharged from the slag discharge pipe 8. In this way, the exhaust area in the large-caliber blasthole can be reduced, and the purpose of increasing the air flow velocity in the slag discharge pipe 8 can be achieved.

[0065] The details of the above technical solution are as follows: Figure 2 As shown, the upper end of the gas injection pipe 6 is fixedly connected to the end cap 10, and a gas injection joint 9 connected to the gas source is fixed on one side of the end cap 10. The upper end of the slag discharge pipe 8 passes through the top of the end cap 10, and the connection is sealed. A plurality of annular rubber frames 28 need to be configured in the gas injection pipe 6. The plurality of annular rubber frames 28 are arranged at intervals according to the length of the gas injection pipe 6. The outer side of the annular rubber frame 28 is interference fit with the inner side of the gas injection pipe 6, and the inner side of the annular rubber frame 28 is provided with a plurality of fixing parts for fixing pipes, signal lines and cables.

[0066] By setting the end cap 10, gas injection and exhaust can be achieved in the gas injection pipe 6 and the slag discharge pipe 8, and all pipelines and signals can be laid out before cables. The signals of the slag discharge pipe 8, the high-pressure gas pipe 7, the motor wires, and the gas concentration sensor probe 27 are all concentrated in the gas injection pipe 6 first, which not only makes it convenient to store them in a round shape, but also avoids scratches and damages. In addition, the gas concentration sensor probe 27 is directly set at the bottom of the hole, and there is no large airflow in the detection area, so the large airflow velocity can be avoided to affect the gas concentration sensor probe 27's monitoring of gas.

[0067] like Figure 14 As shown, this technical solution requires an air compressor, a gas concentration sensor receiver, a power supply for the inner wall equipment, and a control host. The control host controls the on and off of the gas injection and the gas injection pressure through the solenoid valve, and controls the operation of the power motor inside the equipment. It is configured using existing technology and will not be elaborated here.

[0068] During use, as the rock debris is gradually discharged, it is necessary to adjust the position of the device in the hole at intervals. It is only necessary to discharge the compressed gas in the airtight structure, stop the gas injection pipe 6 from injecting gas, and control the fixing assembly to release the fixation. The device will slide down quickly under the action of the gravity of the slag discharge pipe 8, the gas injection pipe 6 and the bottom equipment and come into contact with the rock debris remaining at the bottom. It can then be re-sealed and re-injected, so that the slag cleaning work in the large-diameter blast hole can be achieved.

[0069] As another alternative to the airtight structure, a whole piece of rubber can be directly used. The diameter of the rubber part needs to be larger than the diameter of the blast hole, and the device is sent into the bottom of the blast hole by a straight plug. Of course, this will cause greater wear on the rubber part during the pumping process, and it also needs to be replaced frequently. Therefore, it can only be used as a backup solution when the rubber tube 2 is damaged and cannot be repaired in time.

[0070] It should be noted that the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0071] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof blasthole slag cleaning and gas concentration monitoring integrated device, comprising a slag discharge pipe (8), an air injection pipe (6), an air guide pipe (15) installed at the lower end of the air injection pipe (6), and a gas concentration sensor probe (27) installed on one side of the air guide pipe (15), characterized in that: Also includes: A flow dividing assembly is composed of a collecting cover (16) and a guide cover (17), and a flow dividing channel and a flow collecting channel are formed in the air guide pipe (15); the slag discharge pipe (8) is sleeved in the air injection pipe (6) and connected to the upper end of the flow collecting cover (16); the compressed air in the air injection pipe (6) passes through the flow dividing channel, carries rock slag from the lower end of the flow collecting cover (16), enters the flow collecting channel, and is discharged from the slag discharge pipe (8); A spoiler assembly is installed in the guide cover (17), and the spoiler assembly is used to mix the rock debris in the blast hole with the compressed air flow to form dust that enters the collecting channel. At the same time, the spoiler assembly can be used to assist the diversion assembly in forming a pulsed airflow; A fixing assembly is installed outside the air guide tube (15) and uses a plurality of synchronously retractable supporting arms (13) to fix the air guide tube (15) in the blast hole during slag cleaning; An airtight structure is installed on the wall of the air guide tube (15) and is used to seal and maintain pressure between the air guide tube (15) and the blast hole.

2. The explosion-proof blasthole slag cleaning and gas concentration monitoring integrated device according to claim 1 is characterized in that: The diversion assembly is composed of a flow guide cover (17), a flow collecting cover (16) and an air guide pipe (15) which are connected in sequence from the inside out. The upper end of the air guide pipe (15) is provided with a bundle mouth portion (5) connected to the main air pipe, and the lower end of the air guide pipe (15) is provided with a flaring portion (1) matching the diameter of the blast hole. The upper end of the flow collecting cover (16) is a conical structure and is provided with a connecting portion connected to the slag discharge pipe (8). The lower end of the flow collecting cover (16) is provided with a bell mouth matching the flaring portion (1). The side wall of the flow collecting cover (16) is fixedly connected to a plurality of connection blocks with threaded holes along the circumferential direction, and the side wall of the air guide pipe (15) is connected to the plurality of connection blocks by bolts. The deflector cover (17) is a shuttle-shaped structure, and its lower end is fixed to the bell mouth of the collecting cover (16) through a bracket.

3. The explosion-proof blasthole slag cleaning and gas concentration monitoring integrated device according to claim 1 is characterized in that: The spoiler assembly comprises a fixed plate (23), a side wall of the fixed plate (23) is provided with a plurality of circular holes, a hollow shaft (22) is rotatably connected between the air guide cover (17) and the fixed plate (23) via a sealed bearing, the side wall of the hollow shaft (22) is fixedly connected to the spoiler assembly, a spoiler blade (20) is fixedly connected to the lower end of the hollow shaft (22), a first motor (24) is fixedly connected to the upper end of the fixed plate (23), and an output end of the first motor (24) is fixedly connected to the upper end of the hollow shaft (22); The upper end of the collecting cover (16) is sleeved with a plurality of fixing bolts (25) with holes through a circular hole, and the side wall of the guide cover (17) is fixedly connected to the fixing bolts (25) through a threaded hole. Two air inlet holes are opened on the shaft wall of the hollow shaft (22) and are located inside the guide cover (17). Two air outlet holes for providing compressed gas to the spoiler assembly are opened on the shaft wall of the hollow shaft (22) and are located outside the guide cover (17). The spoiler assembly is arranged at the lower end of the air guide pipe (15) and the collecting cover (16).

4. The explosion-proof blasthole slag cleaning and gas concentration monitoring integrated device according to claim 3 is characterized in that: The spoiler assembly includes an air distribution plate (31), the air distribution plate (31) is a hollow structure, two guide holes matching the air outlet holes are provided on the inner side of the air distribution plate (31), a plurality of spoiler tubes (21) are fixedly connected at an angle on the circumference of the air distribution plate (31), and the circumference of the air distribution plate (31) is connected to the spoiler tubes (21) by setting air holes, and the plurality of spoiler tubes (21) are fixedly connected to an air distribution ring (19) in common, and the air distribution ring (19) is sleeved on the diversion channel between the air guide tube (15) and the collecting cover (16); The spoiler tube (21) is a rectangular structure, and a plurality of radiation holes are provided on its four side walls. A spoiler plate (29) with a triangular structure is fixedly connected to the tube wall of the spoiler tube (21).

5. The explosion-proof blasthole slag cleaning and gas concentration monitoring integrated device according to claim 4 is characterized in that: A circular ring (18) in contact with the upper end of the gas distribution ring (19) is provided in the diversion channel, the inner side of the circular ring (18) is fixed to the lower end of the collecting cover (16), the side wall of the air guide pipe (15) is fixedly connected to the side wall of the fixing ring by bolts, a plurality of vertically arranged diversion holes (12) are opened through the side wall of the circular ring (18), a plurality of inverted Y-shaped gas distribution grooves (30) are opened on the inner side of the gas distribution ring (19), and a plurality of L-shaped gas distribution holes (37) are opened on the gas distribution ring (19), and the gas distribution holes (37) and the gas distribution grooves (30) are staggered.

6. The explosion-proof blasthole slag cleaning and gas concentration monitoring integrated device according to claim 3 is characterized in that: The spoiler blade (20) is provided with a plurality of spoiler portions, wherein each spoiler portion is provided with an upward bending portion (32) and a downward inclined portion (38), and the lower end of the inclined portion (38) is lower than the lower end of the air guide pipe (15).

7. The explosion-proof blasthole slag cleaning and gas concentration monitoring integrated device according to claim 1 is characterized in that: The fixing assembly includes a fixing cover (4), the fixing cover (4) is sleeved on the side wall of the air guide tube (15) and fixed by bolts, a plurality of rotating shafts (14) are rotatably connected in the fixing cover (4) through a bearing seat, a plurality of support arms (13) are respectively fixed on the plurality of rotating shafts (14) in groups of two, a plurality of strip holes (11) are opened on the side wall of the fixing cover (4) and matched with the support arms (13), a second motor (26) is fixedly connected to the inner side of the fixing cover (4), an output end of the second motor (26) is fixedly connected to a worm (34), the worm (34) is meshed with a worm wheel (35), and the worm wheel (35) is fixedly connected to the upper end of one of the rotating shafts (14); A synchronous belt (36) with inner teeth is provided in the fixed cover (4), and a plurality of synchronous pulleys (33) with inner teeth are wound around the inner side of the synchronous belt (36). The plurality of synchronous pulleys (33) are respectively fixed on the shaft walls of the plurality of rotating shafts (14).

8. The explosion-proof blasthole slag cleaning and gas concentration monitoring integrated device according to claim 1 is characterized in that: The airtight structure comprises a connecting cover (3), a rubber tube (2) being fixedly connected between the side wall of the connecting cover (3) and the side wall of the air guide pipe (15) via a clamp, a high-pressure air pipe (7) being fixedly connected to one side of the connecting cover (3), and one end of the high-pressure air pipe (7) passing through the air guide pipe (15) and extending into the air injection pipe (6).

9. The explosion-proof blasthole slag cleaning and gas concentration monitoring integrated device according to claim 1 is characterized in that: The upper end of the gas injection pipe (6) is fixedly connected to an end cap (10), and a gas injection joint (9) connected to a gas source is fixed on one side of the end cap (10). The upper end of the slag discharge pipe (8) passes through the top of the end cap (10), and the connection is sealed.

10. The explosion-proof blasthole slag cleaning and gas concentration monitoring integrated device according to claim 1, characterized in that: A plurality of annular rubber frames (28) need to be arranged in the gas injection pipe (6), and the plurality of annular rubber frames (28) are arranged at intervals according to the length of the gas injection pipe (6). The outer side of the annular rubber frame (28) is interference-fitted with the inner side of the gas injection pipe (6), and the inner side of the annular rubber frame (28) is provided with a plurality of fixing parts for fixing pipes, signal lines and cables.

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