A dustproof air pressure drilling equipment for rock-soil body and a dust removal method

Abstract

The application discloses a rock-soil dustproof air pressure drilling equipment and a dust removal method. The equipment comprises a drill bit, a dust removal spray pipe and a liquid storage tank. The drill bit is provided with a drill rod. The dust removal spray pipe is located on one side of the drill rod and parallel to the drill rod, and moves synchronously with the drill rod to the drilling direction. The length of the dust removal spray pipe in the axial direction is less than the length of the drill rod, so that the free end of the dust removal spray pipe sprays liquid dust removal outside the drilling hole or sprays liquid into the drilling hole along with the drill rod, and the liquid is bonded with dust to form wet rock-soil particles and is discharged in the form of mud. The liquid storage tank is connected with the dust removal spray pipe through a pipeline to transport liquid to the dust removal spray pipe and spray the liquid out through the free end of the dust removal spray pipe. The dust removal spray pipe is arranged on one side of the drill rod and moves synchronously with the drill rod, so that the dust removal spray pipe is integrated with the drill bit, the volume is reduced, and the movement is facilitated.

Description

Technical Field

[0001] This application relates to the field of pneumatic drilling machine technology, and in particular to a dust-proof pneumatic drilling device and dust removal method for rock and soil. Background Technology

[0002] Rock and soil masses are often reinforced using anchor bolts and cables, and drilling is done using pneumatic drills, which generate significant dust and pollute the environment. This is particularly problematic in urban areas and surrounding residential sites, where dust control is difficult, affecting the quality of dust control, failing to meet environmental protection requirements, and impacting the overall project schedule.

[0003] When using pneumatic drills, if the airflow is too low, it's difficult to blow out the crushed rock and soil particles. As the drilling depth increases, the airflow also increases, which can blow out the rock and soil particles, but this leads to a wider dust dispersion area. Traditional spray dust suppression is difficult to effectively control dust, or requires multiple fog cannons to suppress dust simultaneously. Solving the dust problem entirely with industrial dust collectors requires large, high-powered equipment, significantly increasing processing costs. Installing and moving large-volume industrial dust collectors on-site is also inconvenient; furthermore, the uneven surface of rock and soil makes it difficult to seal and collect dust before it enters the dust collection equipment.

[0004] Therefore, it is urgent to solve the dust problem caused by air pressure drilling in rock and soil. Summary of the Invention

[0005] This application provides a dust-proof pneumatic drilling device and dust removal method for rock and soil. By setting a parallel dust removal nozzle on one side of the drill rod and moving synchronously with the drill rod, the dust removal nozzle and the drill bit are integrated into one unit, reducing the size and facilitating movement. The technical solution is as follows:

[0006] The first aspect of this application provides a pneumatic drilling device for dust suppression in rock and soil, including a drill bit, a dust suppression nozzle, and a liquid storage tank. The drill bit has a drill rod. The dust suppression nozzle is located on one side of the drill rod and parallel to the drill rod, and moves synchronously with the drill rod towards the drilling direction. The axial length of the dust suppression nozzle is less than the length of the drill rod, so that the free end of the dust suppression nozzle can spray liquid outside the borehole to remove dust or extend into the borehole with the drill rod to spray liquid and bind it with dust into moist rock and soil particles, which are discharged in the form of mud. The liquid storage tank is connected to the dust suppression nozzle through a pipeline to deliver liquid to the dust suppression nozzle and spray it out through the free end of the dust suppression nozzle.

[0007] For example, in one embodiment of the rock and soil dust suppression pneumatic drilling equipment, a telescopic mechanism is further included, which is detachably connected to the end of the dust suppression nozzle away from the free end of the dust suppression nozzle, and drives the dust suppression nozzle to move axially; wherein, the sum of the maximum telescopic length of the telescopic mechanism and the axial length of the dust suppression nozzle is less than the length of the drill rod.

[0008] For example, in one embodiment of the gas pressure drilling equipment for dust control in soil and rock, an automatic dosing device is also included. The automatic dosing device is connected to the storage tank to add dust removal agent to the storage tank, thereby increasing the particle size and strength of the soil and rock particles that are bonded together with the aqueous solution containing the dust removal agent.

[0009] For example, in a soil and rock dust suppression pneumatic drilling device provided in one embodiment, a variable frequency water pump is provided on the pipeline connecting the liquid storage tank and the dust suppression nozzle, and the injection volume and pressure of the dust suppression nozzle are controlled by the variable frequency water pump.

[0010] For example, in a rock and soil dust suppression pneumatic drilling device provided in one embodiment, an electrically controlled water inlet flow valve is provided on one side of the liquid storage tank to control the amount of liquid in the liquid storage tank; an electric stirring mechanism is provided in the liquid storage tank to make the dust removal agent in the liquid storage tank evenly mixed.

[0011] For example, in one embodiment of the rock and soil dust-proof pneumatic drilling equipment, an air compressor is also included. The air compressor is CNC connected to the drill bit, and a drilling depth measuring device is provided on the drill bit to detect the drilling depth.

[0012] For example, in one embodiment of the rock and soil dust suppression pneumatic drilling equipment, a control system is also included. The control system is connected to the telescopic mechanism, the variable frequency water pump, the water inlet flow valve, the stirring mechanism and the air compressor via a circuit. The control system controls the opening and closing of the telescopic mechanism, the variable frequency water pump, the water inlet flow valve, the stirring mechanism and the air compressor and their operating parameters to adjust the drilling speed, hole depth, air pressure, air volume, water pressure, water volume and dust removal agent addition amount.

[0013] For example, in a soil and rock dust suppression pneumatic drilling device provided in one embodiment, several injection holes are evenly distributed on the outer wall of the dust removal nozzle near the free end.

[0014] For example, in a rock and soil dust-proof pneumatic drilling device provided in one embodiment, a mudguard is fitted at the connection between the drill rod and the drill bit to block the reverse impact of the mud.

[0015] The second aspect of this application provides a dust removal method using the aforementioned air pressure drilling equipment for soil and rock dust control, comprising the following steps: determining the drilling speed, hole depth, air pressure, air volume, water pressure, water volume, and dust removal agent addition amount according to the properties of the soil and rock to be drilled, and setting the working parameters through a control system; starting the drill bit to drill; when the drilling depth is less than the axial distance between the free end of the dust removal nozzle and the free end of the drill rod, the free end of the dust removal nozzle is located outside the borehole, and dust is removed by water mist sprayed from the dust removal nozzle, or by controlling the movement of the dust removal nozzle through a telescopic mechanism so that the free end of the dust removal nozzle abuts against the borehole opening for dust removal; when the drilling depth is greater than the axial distance between the free end of the dust removal nozzle and the free end of the drill rod, the free end of the dust removal nozzle extends into the borehole, and the depth of the dust removal nozzle extending into the borehole is controlled by a telescopic mechanism, and the water mist sprayed from the dust removal nozzle is forcibly mixed with the dust in the borehole under the action of airflow, agglomerated into moist soil and rock particles, and discharged in the form of mud.

[0016] The beneficial effects of the pneumatic drilling equipment and dust removal method for soil and rock mass provided in some embodiments of this application are as follows: By setting a parallel dust removal nozzle on one side of the drill rod, and the length of the dust removal nozzle in the axial direction is less than the length of the drill rod, that is, the free end of the dust removal nozzle is located behind the drill rod, so that in the shallow hole drilling stage, the dust removal nozzle sprays dust outside the borehole, and in the deep hole drilling stage, the dust removal nozzle extends into the borehole, and the water mist and dust are forcibly mixed by the high-pressure airflow, and finally formed moist soil and rock particles and discharged in the form of mud, with excellent dust removal effect; the dust removal nozzle of the pneumatic drilling equipment for soil and rock mass of this application can be installed on the drill bit, so that the dust removal nozzle and the drill bit are integrated into one piece, reducing the volume and facilitating movement; or the dust removal nozzle and liquid storage tank and other equipment are integrated into a mobile platform, working in conjunction with the drill bit, which is convenient for installation and movement, and construction is convenient. The equipment is a one-time investment, reducing operating costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the dust-proof pneumatic drilling equipment for soil and rock in this application. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0021] The first aspect of this application provides a dust-proof pneumatic drilling device for rock and soil, such as... Figure 1 As shown, the system includes a drill bit 1, a dust removal nozzle 2, and a liquid storage tank 3. The drill bit 1 has a drill rod 11. The dust removal nozzle 2 is located on one side of the drill rod 11 and is parallel to the drill rod 11. It moves synchronously with the drill rod 11 towards the drilling direction. The axial length of the dust removal nozzle 2 is less than the length of the drill rod 11, so that the free end of the dust removal nozzle 2 can spray liquid to remove dust outside the borehole or extend into the borehole with the drill rod 11 to spray liquid and bind it with dust into moist rock and soil particles, which are then discharged in the form of mud. The liquid storage tank 3 is connected to the dust removal nozzle 2 through a pipeline to supply liquid to the dust removal nozzle 2 and spray it out through the free end of the dust removal nozzle 2.

[0022] According to the above embodiments, the dust-suppressing pneumatic drilling equipment for soil and rock in this application has a parallel dust-suppressing nozzle 2 set on one side of the drill rod 11, and the length of the dust-suppressing nozzle 2 in the axial direction is less than the length of the drill rod 11, that is, the free end of the dust-suppressing nozzle 2 is located behind the drill rod 11. This allows the dust-suppressing nozzle 2 to spray dust outside the borehole during the shallow hole drilling stage, and to extend into the borehole during the deep hole drilling stage. The high-pressure airflow forces the water mist and dust to mix, ultimately forming moist soil and rock particles that are discharged in the form of mud, resulting in excellent dust removal effect. The dust-suppressing nozzle 2 and the drill rod 11 are independent of each other and do not affect each other's operation. In the dust-suppressing pneumatic drilling equipment for soil and rock in this application, the dust-suppressing nozzle can be installed on the drill bit, so that the dust-suppressing nozzle and the drill bit are integrated into one unit, reducing the volume and facilitating movement; or the dust-suppressing nozzle 2 and the liquid storage tank 3 and other equipment can be integrated onto a mobile platform to work with the drill bit, which is convenient for installation and movement, and construction is convenient. The equipment is a one-time investment, reducing operating costs.

[0023] For example, in a soil and rock dust-proof pneumatic drilling device provided in one embodiment, such as Figure 1 As shown, it also includes a telescopic mechanism 4, which is detachably connected to the end of the dust removal nozzle 2 away from the free end of the dust removal nozzle 2, and drives the dust removal nozzle 2 to move axially; wherein, the sum of the maximum telescopic length of the telescopic mechanism 4 and the axial length of the dust removal nozzle 2 is less than the length of the drill rod 11.

[0024] For drilling rigs using tracked bases, the telescopic mechanism 4 and dust removal nozzle 2 can be directly installed on the drill bit; for small manually operated mobile drilling rigs, dust removal equipment can be integrated into a mobile platform for easy movement or hoisting.

[0025] The dust removal nozzle 2 is installed on the telescopic mechanism 4, which has a telescopic range of 1-2m. The dust removal nozzle 2 is made of steel pipe. The dust removal nozzle 2 is detachably connected to the telescopic mechanism 4, making it easy to replace the dust removal nozzle 2.

[0026] For example, in a soil and rock dust-proof pneumatic drilling device provided in one embodiment, such as Figure 1 As shown, it also includes an automatic dosing device 5, which is connected to the storage tank 3 to add dust-removing agent to the storage tank 3. This increases the particle size and strength of the particles that bind the dust in the borehole with the aqueous solution containing the dust-removing agent to form soil particles. According to the above embodiment, by adding dust-removing agent through the automatic dosing device 5 and determining the amount of dust-removing agent added based on the properties of the soil, the dust-removing agent can increase the particle size of the wetted particles, and after drying, the particles form a whole with a certain strength, preventing particles that fall to the ground from forming dust again during construction, increasing dust removal efficiency, and reducing water consumption.

[0027] For example, in a soil and rock dust-proof pneumatic drilling device provided in one embodiment, such as Figure 1 As shown, a variable frequency water pump 31 is provided on the pipeline connecting the liquid storage tank 3 and the dust removal spray pipe 2, and the spray volume and pressure of the dust removal spray pipe 2 are controlled by the variable frequency water pump 31.

[0028] For example, in a soil and rock dust-proof pneumatic drilling device provided in one embodiment, such as Figure 1 As shown, an electrically controlled water inlet flow valve 32 is provided on one side of the liquid storage tank 3 to control the amount of liquid in the liquid storage tank 3; an electric stirring mechanism 33 is provided in the liquid storage tank 3 to make the dust removal agent in the liquid storage tank 3 evenly mixed.

[0029] The electrically controlled water inlet flow valve 32 works in conjunction with the automatic dosing device 5 to control the concentration of the dust removal liquid and ensure the best dust removal effect.

[0030] For example, in a soil and rock dust-proof pneumatic drilling device provided in one embodiment, such as Figure 1 As shown, it also includes an air compressor 12, which is CNC connected to the drill bit 1. The drill bit 1 is equipped with a drilling depth measuring device to detect the drilling depth.

[0031] Among them, the air compressor 12 has air volume and air pressure control functions.

[0032] For example, in a soil and rock dust-proof pneumatic drilling device provided in one embodiment, such as Figure 1 As shown, the system also includes a control system 6. The control system 6 is electrically connected to the telescopic mechanism 4, the variable frequency water pump 31, the inlet flow valve 32, the stirring mechanism 33, and the air compressor 12. The control system 6 controls the opening and closing of the telescopic mechanism 4, the variable frequency water pump 31, the inlet flow valve 32, the stirring mechanism 33, and the air compressor 12, as well as their operating parameters, to adjust drilling speed, hole depth, air pressure, air volume, water pressure, water volume, and the amount of dust removal agent added. According to the above embodiment, by setting up the control system 6, various parameters can be comprehensively controlled to ensure the normal operation of the drilling rig and the dust removal effect. The control system 6 database can be continuously optimized based on the soil and rock parameters and the construction equipment parameters to optimize the control parameters and ensure the dust removal effect.

[0033] For example, in one embodiment of the gas pressure drilling equipment for dust suppression in soil and rock, several injection holes are evenly distributed on the outer wall of the dust suppression nozzle 2 near its free end. For example, holes are evenly opened within a 1-meter length of the free end of the dust suppression nozzle 2 to facilitate the spraying of dust suppression liquid.

[0034] For example, in a rock and soil dust-proof pneumatic drilling device provided in one embodiment, a mudguard is fitted at the connection between the drill rod 11 and the drill bit 1 to block the reverse impact of the mud.

[0035] The second aspect of this application provides a dust removal method using the aforementioned air pressure drilling equipment for soil and rock dust control, comprising the following steps:

[0036] Based on the properties of the rock and soil mass to be drilled, the drilling speed, hole depth, air pressure, air volume, water pressure, water volume, and dust removal agent addition amount are determined, and the working parameters are set through the control system 6.

[0037] Preparations for water, electricity, and construction roads were completed on site, and drilling rigs and dust removal equipment were in place.

[0038] Start drilling with drill bit 1;

[0039] When the drilling depth is less than the axial distance between the free end of the dust removal nozzle 2 and the free end of the drill rod 11, for example, when the drilling depth is less than 0.5m, the free end of the dust removal nozzle 2 is located outside the borehole. Dust is removed by the water mist sprayed from the dust removal nozzle 2, or by controlling the movement of the dust removal nozzle 2 through the telescopic mechanism 4 so that the free end of the dust removal nozzle 2 abuts against the orifice for dust removal.

[0040] When the drilling depth is greater than the axial distance between the free end of the dust removal nozzle 2 and the free end of the drill rod 11, for example, when the drilling depth is greater than 0.5m, the free end of the dust removal nozzle 2 extends into the borehole. The depth of the dust removal nozzle 2 extending into the borehole is controlled by the telescopic mechanism 4. The water mist sprayed from the dust removal nozzle 2 is forcibly mixed with the dust in the borehole under the action of airflow, and the mixture is bonded into moist rock and soil particles and discharged in the form of mud, thereby effectively controlling the dust.

[0041] Although the embodiments of this application have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this application. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this application is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A dust removal method using a pneumatic drilling device for dust control in rock and soil, characterized in that, The dust-proof pneumatic drilling equipment for rock and soil includes: A drill bit, which has a drill rod; The dust removal nozzle is located on one side of the drill rod and parallel to the drill rod, and moves synchronously with the drill rod towards the drilling direction. The length of the dust removal nozzle in the axial direction is less than the length of the drill rod, so that the free end of the dust removal nozzle can spray liquid to remove dust outside the drill hole or extend into the drill hole with the drill rod to spray liquid and bind with dust into moist rock and soil particles and be discharged in the form of mud. A liquid storage tank is connected to the dust removal nozzle via a pipeline to supply liquid to the dust removal nozzle and spray it out through the free end of the dust removal nozzle; The telescopic mechanism is detachably connected to the end of the dust removal nozzle away from the free end of the dust removal nozzle, and drives the dust removal nozzle to move axially. A control system, which is electrically connected to the telescopic mechanism; The dust removal method using the pneumatic drilling equipment for dust control in soil and rock formations includes the following steps: Based on the properties of the rock and soil mass to be drilled, determine the drilling speed, hole depth, air pressure, air volume, water pressure, water volume, and dust removal agent dosage, and set the working parameters through the control system; Start the drill bit and drill a hole; When the drilling depth is less than the axial distance between the free end of the dust removal nozzle and the free end of the drill rod, the free end of the dust removal nozzle is located outside the borehole. Dust is removed by the water mist sprayed from the dust removal nozzle, or by controlling the movement of the dust removal nozzle through the telescopic mechanism so that the free end of the dust removal nozzle comes into contact with the borehole opening for dust removal. When the drilling depth is greater than the axial distance between the free end of the dust removal nozzle and the free end of the drill rod, the free end of the dust removal nozzle extends into the borehole. The depth of the dust removal nozzle extending into the borehole is controlled by the telescopic mechanism. The water mist sprayed from the dust removal nozzle is forcibly mixed with the dust in the borehole under the action of airflow, and the mixture is bonded into moist rock and soil particles and discharged in the form of mud.

2. The dust removal method using pneumatic drilling equipment for dust control in rock and soil as described in claim 1, characterized in that, The sum of the maximum telescopic length of the telescopic mechanism and the axial length of the dust removal nozzle is less than the length of the drill rod.

3. The dust removal method using pneumatic drilling equipment for dust control in rock and soil as described in claim 2, characterized in that, It also includes an automatic dosing device, which is connected to the storage tank to add dust removal agent to the storage tank, thereby increasing the particle size and strength of the dust in the borehole that bonds with the aqueous solution containing the dust removal agent to form soil particles.

4. The dust removal method using pneumatic drilling equipment for dust control in rock and soil as described in claim 3, characterized in that, A variable frequency water pump is installed on the pipeline connecting the liquid storage tank and the dust removal spray pipe, and the spray volume and pressure of the dust removal spray pipe are controlled by the variable frequency water pump.

5. The dust removal method using pneumatic drilling equipment for dust control in rock and soil as described in claim 4, characterized in that, An electrically controlled water inlet flow valve is provided on one side of the liquid storage tank to control the amount of liquid in the tank; an electric stirring mechanism is provided inside the liquid storage tank to ensure that the dust removal agent in the tank is mixed evenly.

6. The dust removal method using pneumatic drilling equipment for dust control in rock and soil as described in claim 5, characterized in that, It also includes an air compressor, which is CNC connected to the drill bit, and the drill bit is equipped with a drilling depth measuring device to detect the drilling depth.

7. The dust removal method using pneumatic drilling equipment for dust control in rock and soil as described in claim 6, characterized in that, The control system is connected to the telescopic mechanism, the variable frequency water pump, the inlet flow valve, the stirring mechanism, and the air compressor via circuitry. The control system controls the opening and closing of the telescopic mechanism, the variable frequency water pump, the inlet flow valve, the stirring mechanism, and the air compressor, as well as their operating parameters, to adjust the drilling speed, hole depth, air pressure, air volume, water pressure, water volume, and the amount of dust removal agent added.

8. The dust removal method using pneumatic drilling equipment for dust control in rock and soil as described in claim 7, characterized in that, Several spray holes are evenly distributed on the outer wall of the dust removal nozzle near the free end.

9. The dust removal method using pneumatic drilling equipment for dust control in rock and soil as described in claim 1, characterized in that, A mudguard is fitted at the connection between the drill rod and the drill bit to prevent the reverse impact of the mud.

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