Pneumatic handheld drilling machine and using method thereof

Abstract

The invention discloses a pneumatic type handheld drilling machine and a using method thereof.The pneumatic type handheld drilling machine comprises a separation drill rod arranged at the end of an extension drill rod and detachably and fixedly connected with the extension drill rod; the plugging drill rod is arranged at the end part of the separating drill rod and is detachably and fixedly connected with the separating drill rod; the detection assembly is arranged in the plugging drill rod and / or the drill bit and used for detecting whether underground water and / or methane exists at the drill bit or not; and the separation assembly is arranged between the plugging drill rod and the separation drill rod and used for separating the extension drill rod from the plugging drill rod when underground water or methane is detected, and the plugging drill rod is reserved in the drill hole to plug the drill hole. According to the pneumatic handheld drilling machine and the using method thereof, the design is reasonable, the condition of underground water at the drill bit can be detected in time, too high experience requirements on workers are avoided, and the personal safety of the workers is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of pneumatic hand drills, and particularly to a pneumatic hand drill and a using method thereof. Background Art

[0002] Flood is a relatively common accident in coal mine production. Such accidents are sudden and cause serious harm to the mine. The occurrence of flood can cause devastating disasters to the mine in a very short time. In the scope of some production mines, there are often many water-filled small kiln old goafs, faults and water-rich aquifers.

[0003] In the prior art, the following methods are usually used to determine whether groundwater is drilled during drilling: 1. Change in the sound of the drill: When the drill bit contacts the aquifer, due to the decrease in resistance, the running sound of the drill will significantly become lighter or there will be a water flow sound; 2. Sudden increase in the penetration rate: When drilling to the aquifer, the rock formation becomes soft, and the penetration rate of the drill bit will suddenly increase, and there may be a water leakage phenomenon.

[0004] The above two methods require workers to have sufficient experience for judgment, and have high requirements for drilling workers; if the workers fail to judge that groundwater has been drilled, the phenomenon of groundwater spraying out from the drill hole will occur when withdrawing the drill pipe, affecting the personal safety of the surrounding workers.

[0005] For the detection of methane, it is necessary to withdraw the drill pipe from the drill hole and let the gas diffuse from the drill hole into the roadway and then detect it through a methane detector, which has a great impact on the physical and mental safety of workers.

[0006] Therefore, it is necessary to improve the pneumatic hand drill and its using method in the prior art. Summary of the Invention

[0007] The purpose of the present invention is to overcome the defects existing in the prior art, and provide a pneumatic hand drill and a using method thereof, which can timely detect the situation of groundwater and methane at the drill bit, avoid excessive requirements for the experience of workers, and ensure the personal safety of workers.

[0008] To solve the above technical problems, the present invention provides a pneumatic hand drill and its use method, including: a frame base; a drill body connected to the frame base; an extension drill rod provided with several and detachably fixedly connected end to end in sequence, and detachably fixedly connected to the rotating shaft of the drill body; a separating drill rod arranged at the end of the extension drill rod and detachably fixedly connected to the extension drill rod; a plugging drill rod arranged at the end of the separating drill rod and detachably fixedly connected to the separating drill rod; a drill bit arranged at the end of the plugging drill rod and detachably fixedly connected to the plugging drill rod; a detection component arranged in the plugging drill rod and / or the drill bit for detecting whether there is groundwater and / or methane at the drill bit; a separation component arranged between the plugging drill rod and the separating drill rod for separating the extension drill rod from the plugging drill rod and leaving the plugging drill rod in the drill hole to plug the drill hole when groundwater or methane is detected.

[0009] According to an embodiment of the present invention, the plugging drill rod is provided with an installation cavity, and a detection channel communicating with the outer wall of the plugging drill rod is arranged; the detection component includes a detection end arranged in the installation cavity, and the detection end includes a water immersion sensor and a methane sensor.

[0010] According to an embodiment of the present invention, the plugging drill rod is provided with a female socket, and the separating drill rod is provided with a male plug that is plugged and matched with the female socket; the separation component includes a limit pin movably connected to the male plug and a limit hole arranged on the side wall of the female socket, and the limit pin is in limit cooperation with the limit hole; the limit pin has two working positions, the first working position: the limit pin is arranged in the limit hole; the second working position, the limit pin is separated from the limit hole.

[0011] According to an embodiment of the present invention, the separation component includes a pulling component for separating the limit pin from the limit hole, and the separation component further includes an elastic member for pressing the limit pin tightly in the limit hole in the natural state.

[0012] According to an embodiment of the present invention, the pulling component includes a pin shaft seat, the separating drill rod is provided with a sliding groove, and the extending direction of the sliding groove is parallel to the axis direction of the separating drill rod, and the pin shaft seat is slidably connected to the sliding groove; in the first working position, the pin shaft seat is adjacent to one end of the sliding groove; in the second working position, the pin shaft seat is adjacent to the other end of the sliding groove.

[0013] According to an embodiment of the present invention, the pin shaft seat is provided with an inclined groove, the inclined groove is inclined and its inclined direction faces the plugging drill pipe, and the limit pin is slidably connected with the inclined groove; in the first working position, the sliding end of the limit pin is arranged adjacent to the notch of the inclined groove; in the second working position, the sliding end of the limit pin is arranged adjacent to the bottom of the inclined groove.

[0014] According to an embodiment of the present invention, the limit pin is provided with a guide groove, the extending direction of the guide groove is perpendicular to the axial direction of the limit groove, a compression spring seat is slidably arranged in the guide groove, and the elastic member is clamped between the compression spring seat and the bottom of the inclined groove.

[0015] According to an embodiment of the present invention, the disengaging drill pipe is provided with a blind hole, and in the second working position, the limit pin is in limit cooperation with the blind hole.

[0016] According to an embodiment of the present invention, a push-pull rod is arranged at the end of the pin shaft seat, and the push-pull rod penetrates through the disengaging drill pipe; an extension rod is further included, and a plurality of the extension rods are detachably fixedly connected end to end in sequence, the extension rod is detachably fixedly connected with the push-pull rod, and the extension rod penetrates through the extension drill pipe.

[0017] According to an embodiment of the present invention, the two ends of the extension drill pipe are provided with a first female port and a first male head, a first jack is arranged on the side wall of the first female port, a first elastic pin is arranged on the side wall of the first male head, and the first elastic pins of adjacent two extension drill pipes are in limit cooperation with the first jacks.

[0018] According to an embodiment of the present invention, the two ends of the extension rod are provided with a second female port and a second male head, a second jack is arranged on the side wall of the second female port, a second elastic pin is arranged on the side wall of the second male head, and the second elastic pins of adjacent two extension rods are in limit cooperation with the second jacks.

[0019] According to an embodiment of the present invention, the second elastic pin and the first jack are arranged coaxially.

[0020] According to an embodiment of the present invention, the extension drill pipe is provided with a through hole, and the extension rod penetrates through the through hole.

[0021] The present invention also provides a use method of a pneumatic hand-held drill, including the following steps: S100, fixing the frame seat tightly against the side wall of the roadway; S200, fixing the drill body on the frame seat; S300, fixedly connecting the drill bit with the plugging drill pipe, and then starting the drill body to perform drilling operation on the side wall of the roadway; S400. As the drilling continues deeper, separate the plugging drill pipe from the drill rig body, connect a disengaging drill pipe to the end of the plugging drill pipe to continue the drilling operation, and the disengaging drill pipe is connected to the drill rig body; S500. As the drilling continues deeper, separate the disengaging drill pipe from the drill rig body, connect an extension drill pipe to the end of the disengaging drill pipe, the extension drill pipe is connected to the drill rig body, and continue the drilling operation; S600. As the drilling continues deeper, continuously connect one section of extension drill pipe after another; S700. When the detection end detects groundwater or methane, stop the drilling operation; S800. Separate the disengaging drill pipe from the plugging drill pipe, and the plugging drill pipe remains in the drill hole to play a plugging role.

[0022] Compared with the prior art, the pneumatic hand drill and its use method of the present invention have a reasonable structural design. When the detection components at the drill bit or the plugging drill pipe detect groundwater or methane, the drilling operation can be stopped in time. The disengaging drill pipe is separated from the plugging drill pipe by using the separation component, and the plugging drill pipe remains in the drill hole to plug the drill hole, waiting for subsequent safety treatment, avoiding the phenomenon of groundwater seepage or methane leakage, improving the safety of drilling, and ensuring the personal safety of workers. Description of the Drawings

[0023] Figure 1 is a schematic structural diagram of the pneumatic hand drill and its use method of the present invention; Figure 2 is a schematic structural diagram of the extension drill pipe, the disengaging drill pipe, the plugging drill pipe, and the drill bit connected; Figure 3 is Figure 2 an explosion schematic diagram of; Figure 4 is a schematic structural diagram of the separation component connected to the disengaging drill pipe; Figure 5 is Figure 4 an explosion schematic diagram of; Figure 6 is Figure 4 a cross-sectional view (first working position) of; Figure 7 is a cross-sectional view of the disengaging drill pipe; Figure 8 is a schematic structural diagram of the separation component; Figure 9 is Figure 8 a cross-sectional view of; Figure 10 is Figure 8 an explosion schematic diagram of; Figure 11 is Figure 10 a cross-sectional view of; Figure 12 is a sectional view of the separating component (second working position); Figure 13 is a schematic structural view of the limit pin; Figure 14 is a schematic structural view of the compression spring seat; Figure 15 is a schematic structural view of the extension drill pipe; Figure 16 is Figure 15 sectional view of; Figure 17 is a schematic structural view of the extension rod; Figure 18 is Figure 17 sectional view of; Figure 19 is a schematic structural view of the plugging drill pipe; Figure 20 is Figure 19 sectional view of; Figure 21 is a schematic structural view of the drill bit; Figure 22 is a schematic structural view of the drill rig body; Figure 23 is a schematic internal structural view of the pin shaft seat; Figure 24 is a schematic view of the state during the switching of the separating component from the first working position to the second working position; Figure 25 is a schematic view of the state of the separating component in the second working position; In the figure: 100, frame seat; 200, drill rig body; 210, rotating shaft; 220, receiving hole; 300, extension drill pipe; 310, first female socket; 311, first jack; 320, first male head; 321, first elastic pin; 330, perforation; 400, disengaging drill pipe; 410, plugging male head; 420, sliding groove; 421, blind hole; 430, elastic pressing block; 500, plugging drill pipe; 510, installation cavity; 520, detection channel; 530, plugging female socket; 531, limit hole; 600, drill bit; 700, detection end; 800, separating component; 810, limit pin; 811, guiding groove; 812, compression spring seat; 820, elastic member; 830, pin shaft seat; 831, inclined groove; 832, push-pull rod; 840, extension rod; 841, second female socket; 842, second male head; 843, second jack; 844, second elastic pin. Specific embodiments

[0024] The following combines the accompanying drawings and embodiments to further describe the specific embodiments of the present invention. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0025] As shown Figures 1 - 25 in the figure, the pneumatic hand drill of the present invention includes: a frame base 100; a drill body 200, which is connected to the frame base 100; an extension drill rod 300, which is provided with a plurality of them and is detachably fixedly connected end to end in sequence, and is detachably fixedly connected to the rotating shaft 210 of the drill body 200; a disengaging drill rod 400, which is arranged at the end of the extension drill rod 300 and is detachably fixedly connected to the extension drill rod 300; a plugging drill rod 500, which is arranged at the end of the disengaging drill rod 400 and is detachably fixedly connected to the disengaging drill rod 400; a drill bit 600, which is arranged at the end of the plugging drill rod 500 and is detachably fixedly connected to the plugging drill rod 500; a detection component, which is arranged in the plugging drill rod 500 and / or the drill bit 600 and is used to detect whether there is groundwater and / or methane at the drill bit 600; a separation component 800, which is arranged between the plugging drill rod 500 and the disengaging drill rod 400 and is used to separate the extension drill rod 300 from the plugging drill rod 500 when groundwater or methane is detected, and retain the plugging drill rod 500 in the drill hole to plug the drill hole.

[0026] Through such a design, a detection component is arranged at the drill bit 600 or the plugging drill rod 500 to monitor in real time whether groundwater or methane will appear during drilling; if the detection component detects an abnormal condition, the drilling operation will be immediately stopped, the disengaging drill rod 400 will be separated from the plugging drill rod 500 through the separation component 800, the disengaging drill rod 400 and the extension drill rod 300 will withdraw from the drill hole, and the plugging drill rod 500 will remain in the drill hole for plugging to avoid the overflow of groundwater or methane, and wait for subsequent safety treatment.

[0027] According to an embodiment of the present invention, the plugging drill rod 500 is provided with an installation cavity 510, and a detection channel 520 communicating with the outer wall of the plugging drill rod 500 is arranged; the detection component includes a detection end 700 arranged in the installation cavity 510, and the detection end 700 includes a water immersion sensor and a methane sensor.

[0028] Through such a design, the detection end 700 is arranged in the plugging drill rod 500, which can play a certain protective role for the detection component during drilling operations; the water immersion sensor can be selected as the Linptech RS1 water immersion sensor; the methane sensor can be selected as the infrared methane sensor GW-3000B.

[0029] According to an embodiment of the present invention, the plugging drill pipe 500 is provided with a female socket 530, and the disengaging drill pipe 400 is provided with a male plug 410 that is inserted and mated with the female socket 530; the separating assembly 800 includes a limit pin 810 that is movably connected to the male plug 410, and a limit hole 531 provided on the side wall of the female socket 530, and the limit pin 810 is in limit cooperation with the limit hole 531; the limit pin 810 has two working positions. The first working position: the limit pin 810 is arranged in the limit hole 531; the second working position, the limit pin 810 is separated from the limit hole 531.

[0030] With such a design, during normal drilling operations and when installing the disengaging drill pipe 400, the limit pin 810 is in the first working position; when groundwater or methane is detected, the disengaging drill pipe 400 needs to be separated from the plugging drill pipe 500. At this time, the limit pin 810 is in the second working position, and there is no axial limit between the disengaging drill pipe 400 and the plugging drill pipe 500, and the disengaging drill pipe 400 can be separated from the plugging drill pipe 500.

[0031] According to an embodiment of the present invention, the separating assembly 800 includes a pulling-away assembly for separating the limit pin 810 from the limit hole 531, and the separating assembly 800 further includes an elastic member 820 for pressing the limit pin 810 tightly in the limit hole 531 in the natural state.

[0032] With such a design, the purpose of switching the limit pin 810 between the first working position and the second working position is achieved.

[0033] According to an embodiment of the present invention, the pulling-away assembly includes a pin shaft seat 830, the disengaging drill pipe 400 is provided with a sliding groove 420, and the extending direction of the sliding groove 420 is parallel to the axis direction of the disengaging drill pipe 400. The pin shaft seat 830 is slidably connected to the sliding groove 420; in the first working position, the pin shaft seat 830 is adjacent to one end of the sliding groove 420; in the second working position, the pin shaft seat 830 is adjacent to the other end of the sliding groove 420.

[0034] With such a design, the position of the limit pin 810 is switched by adjusting the position of the pin shaft seat 830.

[0035] According to an embodiment of the present invention, the pin shaft seat 830 is provided with an inclined groove 831. The inclined groove 831 is inclined, and its inclined direction faces the plugging drill pipe 500. The limit pin 810 is slidably connected to the inclined groove 831. In the first working position, the sliding end of the limit pin 810 is adjacent to the notch of the inclined groove 831. In the second working position, the sliding end of the limit pin 810 is adjacent to the bottom of the inclined groove 831.

[0036] With such a design, the limit pin 810 can extend or retract within the pin shaft seat 830, and the inclined groove 831 guides the limit pin 810.

[0037] According to an embodiment of the present invention, the limit pin 810 is provided with a guiding groove 811. The extending direction of the guiding groove 811 is perpendicular to the axial direction of the limiting groove. A compression spring seat 812 is slidably arranged in the guiding groove 811, and the elastic member 820 is clamped between the compression spring seat 812 and the bottom of the inclined groove 831.

[0038] With such a design, during the sliding process of the limit pin 810, it can ensure that the elastic member 820 is always in a vertical state, avoiding the phenomenon of the elastic member 820 being skewed. The elastic member 820 can be a compression spring or the like.

[0039] According to an embodiment of the present invention, the separating drill pipe 400 is provided with a blind hole 421. In the second working position, the limit pin 810 is in limit cooperation with the blind hole 421.

[0040] With such a design, the limit pin 810 is limited in the blind hole 421, avoiding the phenomenon that the pin shaft seat 830 moves during the separation process of the separating drill pipe 400 from the plugging drill pipe 500.

[0041] According to an embodiment of the present invention, an elastic pressing block 430 is arranged between the blind hole 421 and the side wall of the separating drill pipe 400. When the limit pin 810 is limited in the blind hole 421 and the separating drill pipe 400 is pulled out, when the limit pin 810 needs to be reset to the first working position, the elastic pressing block 430 can be used to squeeze the limit pin 810 to separate the limit pin 810 from the blind hole 421. At this time, by pushing the pin shaft seat 830, the limit pin 810 can be moved to the first working position. The setting of the elastic pressing block 430 can also prevent mud and the like from entering the blind hole 421.

[0042] According to an embodiment of the present invention, a push-pull rod 832 is provided at the end of the pin shaft seat 830, and the push-pull rod 832 is inserted into the disengagement drill pipe 400; an extension rod 840 is further included, and a plurality of the extension rods 840 are detachably fixedly connected end to end in sequence, the extension rod 840 is detachably fixedly connected to the push-pull rod 832, and the extension rod 840 is inserted into the extension drill pipe 300.

[0043] The drilling rig body 200 drives the plugging drill pipe 500 and the drill bit 600 to drill holes. As the drilling gradually deepens, the disengagement drill pipe 400 is connected to the end of the plugging drill pipe 500 in sequence, and the extension drill pipe 300 is connected to the end of the disengagement drill pipe 400, and a plurality of extension drill pipes 300 are connected in sequence; before connecting the extension drill pipe 300, it is necessary to first connect the extension rod 840 to the push-pull rod 832, and then the extension drill pipe 300 is sleeved outside the extension rod 840.

[0044] According to an embodiment of the present invention, first female ports 310 and first male heads 320 are provided at both ends of the extension drill pipe 300. A first jack 311 is provided on the side wall of the first female port 310, and a first elastic pin 321 is provided on the side wall of the first male head 320. The first elastic pins 321 of adjacent two extension drill pipes 300 are in limiting cooperation with the first jack 311.

[0045] Through such a design, the purpose of detachably fixedly connecting the extension drill pipes 300 in sequence is achieved.

[0046] According to an embodiment of the present invention, second female ports 841 and second male heads 842 are provided at both ends of the extension rod 840. A second jack 843 is provided on the side wall of the second female port 841, and a second elastic pin 844 is provided on the side wall of the second male head 842. The second elastic pins 844 of adjacent two extension rods 840 are in limiting cooperation with the second jack 843.

[0047] Through such a design, the purpose of detachably fixedly connecting the extension rods 840 in sequence is achieved.

[0048] According to an embodiment of the present invention, the second elastic pin 844 is arranged coaxially with the first jack 311.

[0049] Through such a design, when it is necessary to disassemble the extension rod 840, a long rod hard object such as a screwdriver can be used to extend into the first jack 311 to apply force to the second elastic pin 844, compress the second elastic pin 844, separate the second elastic pin 844 from the second jack 843, and at this time, the extension rod 840 can be pulled out.

[0050] According to an embodiment of the present invention, the extension drill pipe 300 is provided with a perforation 330, and the extension rod 840 is inserted into the perforation 330.

[0051] According to an embodiment of the present invention, the rotating shaft 210 of the drill rig body 200 is provided with a receiving hole 220 for receiving the extension rod 840.

[0052] The present invention also provides a method for using a pneumatic hand drill, including the following steps: S100. Fix the mounting base 100 tightly against the side wall of the roadway; S200. Fix the drill rig body 200 on the mounting base 100; S300. Fix the drill bit 600 and the plugging drill pipe 500 in a connected manner, and then start the drill rig body 200 to perform a drilling operation on the side wall of the roadway; S400. As the drilling continues to deepen, separate the plugging drill pipe 500 from the drill rig body 200, connect the disengaging drill pipe 400 to the end of the plugging drill pipe 500 to continue the drilling operation, and the disengaging drill pipe 400 is connected to the drill rig body 200; S500. As the drilling continues to deepen, the disengaging drill pipe 400 is separated from the drill rig body 200, the extension rod 840 is inserted and connected to the push-pull rod 832, the extension drill pipe 300 is sleeved outside the extension rod 840, connect the extension drill pipe 300 to the end of the disengaging drill pipe 400, and the extension drill pipe 300 is connected to the drill rig body 200 to continue the drilling operation; S600. As the drilling continues to deepen, continuously connect sections of the extension rod 840 and the extension drill pipe 300. The extension rod 840 is fixed by inserting the second jack 843 and the second elastic pin 844; the extension drill pipe 300 is fixed by inserting the first jack 311 and the first elastic pin 321; S700. When the detection end 700 detects groundwater or methane and the signal receiving end outside the drill hole receives the signal sent by the detection end 700, stop the drilling operation; S800. Separate the disengaging drill pipe 400 from the plugging drill pipe 500, and the plugging drill pipe 500 remains in the drill hole to play a plugging role.

[0053] Among them, S800 includes the following steps S810. Separate the extension drill pipe 300 from the drill rig body 200; S820. Pull the extension rod 840 in the direction of the drill rig body 200. The extension rod 840 drives the push-pull rod 832 to slide, and the push-pull rod 832 drives the pin shaft seat 830 to slide in the chute 420; S830. Under the axial guiding action of the limiting end of the limiting pin 810 in the limiting hole 531 and the guiding action of the sliding end of the limiting pin 810 in the inclined slot 831, the limiting pin 810 makes an axial sliding motion relative to the limiting hole 531 and an oblique sliding motion relative to the pin shaft seat 830; the elastic member 820 is compressed, and the compression spring seat 812 slides with the limiting pin 810, ensuring that the elastic member 820 is always in the vertical direction, and the compression spring seat 812 is relatively fixed to the pin shaft seat 830; S840. When the limiting end of the limiting pin 810 is separated from the limiting hole 531, at this time the elastic member 820 is compressed to the extreme. As the pin shaft seat 830 continues to slide, the limiting end of the limiting pin 810 abuts against the inner wall of the female socket 530, and then abuts against the inner wall of the separating drill pipe 400; S850. When the pin shaft seat 830 abuts against the end of the sliding groove 420, at this time the limiting pin 810 is coaxial with the blind hole 421, and the force applied to the extension rod 840 is stopped. Under the elastic force of the elastic member 820, the limiting pin 810 is inserted into the blind hole 421; at this time, there is no axial limit between the separating drill pipe 400 and the plugging drill pipe 500; S860. The extension drill pipe 300 is connected to the rotating shaft 210 of the drilling rig body 200. Reverse-rotate the rotating shaft 210 to drive the extension drill pipe 300 and the separating drill pipe 400 to reverse and withdraw from the drilling hole, and the plugging drill pipe 500 remains in the drilling hole to play a plugging role.

[0054] In another specific embodiment, the sensor can replace the wireless signal transmission by means of a wire. The wire is matched with the extension drill pipes 300 one by one, and the signal is transmitted from the deep part of the drilling hole to the vicinity of the drilling rig body by means of wire insertion, facilitating the receiving end outside the drilling hole to receive the signal.

[0055] In yet another specific embodiment, an electrical transmission wire is provided in the extension rod 840, and the extension rod 840 can be used as a carrier for electrical signal transmission.

[0056] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A pneumatic hand drill, characterized in that, Comprising: A pedestal (100); A drill rig body (200), which is connected to the pedestal (100); An extension drill pipe (300), which is provided with a plurality of them and are detachably fixedly connected end to end in sequence, and is detachably fixedly connected to the rotating shaft of the drill rig body (200); A disengaging drill pipe (400), which is arranged at the end of the extension drill pipe (300) and is detachably fixedly connected to the extension drill pipe (300); A plugging drill pipe (500), which is arranged at the end of the disengaging drill pipe (400) and is detachably fixedly connected to the disengaging drill pipe (400); A drill bit (600), which is arranged at the end of the plugging drill pipe (500) and is detachably fixedly connected to the plugging drill pipe (500); A detection assembly, which is arranged inside the plugging drill pipe (500) and / or the drill bit (600) and is used to detect whether there is groundwater and / or methane at the drill bit (600); A separation assembly (800), which is arranged between the plugging drill pipe (500) and the disengaging drill pipe (400) and is used to separate the extension drill pipe (300) from the plugging drill pipe (500) when groundwater or methane is detected, and retain the plugging drill pipe (500) in the drill hole to plug the drill hole.

2. The pneumatic hand drill according to claim 1, characterized in that, The plugging drill pipe (500) is provided with an installation cavity (510), and a detection channel (520) communicating with the outer wall of the plugging drill pipe (500) is arranged on the installation cavity (510); the detection assembly includes a detection end (700) arranged in the installation cavity (510), and the detection end (700) includes a water immersion sensor and a methane sensor.

3. The pneumatic hand drill according to claim 1, characterized in that, The plugging drill pipe (500) is provided with a female socket (530), and the disengaging drill pipe (400) is provided with a male plug (410) that is plugged and matched with the female socket (530); the separation assembly (800) includes a limit pin (810) movably connected to the male plug (410), and a limit hole (531) arranged on the side wall of the female socket (530), and the limit pin (810) is in limit cooperation with the limit hole (531); the limit pin (810) has two working positions. The first working position: the limit pin (810) is arranged in the limit hole (531); The second working position, where the limit pin (810) is separated from the limit hole (531).

4. The pneumatic hand drill according to claim 3, characterized in that, The separation assembly (800) includes a pulling-off assembly for separating the limit pin (810) from the limit hole (531), and the separation assembly (800) further includes an elastic member (820) for pressing the limit pin (810) tightly in the limit hole (531) in the natural state.

5. The pneumatic hand drill according to claim 4, characterized in that, The pulling-away assembly includes a pin shaft seat (830). The separating drill pipe (400) is provided with a sliding groove (420). The extending direction of the sliding groove (420) is parallel to the axial line direction of the separating drill pipe (400). The pin shaft seat (830) is slidably connected to the sliding groove (420). In the first working position, the pin shaft seat (830) is adjacent to one end of the sliding groove (420). In the second working position, the pin shaft seat (830) is adjacent to the other end of the sliding groove (420).

6. The pneumatic hand drill according to claim 5, characterized in that, The pin shaft seat (830) is provided with an inclined groove (831). The inclined groove (831) is inclined and its inclined direction faces the plugging drill pipe (500). The limit pin (810) is slidably connected to the inclined groove (831). In the first working position, the sliding end of the limit pin (810) is adjacent to the notch of the inclined groove (831). In the second working position, the sliding end of the limit pin (810) is adjacent to the bottom of the inclined groove (831).

7. The pneumatic hand drill according to claim 6, wherein, The limit pin (810) is provided with a guiding groove (811). The extending direction of the guiding groove (811) is perpendicular to the axial direction of the limit groove. A compression spring seat (812) is slidably arranged in the guiding groove (811). The elastic member (820) is clamped between the compression spring seat (812) and the bottom of the inclined groove (831).

8. The pneumatic hand drill according to claim 7, characterized in that, The separating drill pipe (400) is provided with a blind hole (421). In the second working position, the limit pin (810) is in limit fit with the blind hole (421).

9. The pneumatic hand drill according to claim 8, characterized in that, The end of the pin shaft seat (830) is provided with a push-pull rod (832). The push-pull rod (832) penetrates through the separating drill pipe (400). An extension rod (840) is further included. A plurality of the extension rods (840) are detachably and fixedly connected end to end in sequence. The extension rod (840) is detachably and fixedly connected to the push-pull rod (832). The extension rod (840) penetrates through the extension drill pipe (300).

10. A method of using a pneumatic hand drill, using the pneumatic hand drill as described in claim 9, characterized in that, It includes the following steps: S100. Fix the frame seat (100) closely against the side wall of the roadway; S200. Fix the drill rig body (200) on the frame seat (100); S300. Fix the drill bit (600) to the plugging drill pipe (500), and then start the drill rig body (200) to perform drilling operations on the side wall of the roadway; S400. As the drilling continues to deepen, separate the plugging drill pipe (500) from the drill rig body (200), connect the separating drill pipe (400) to the end of the plugging drill pipe (500) and continue the drilling operation. The separating drill pipe (400) is connected to the drill rig body (200); S500. As the drilling continues to deepen, separate the separating drill pipe (400) from the drill rig body (200), connect the extension drill pipe (300) to the end of the separating drill pipe (400), and the extension drill pipe (300) is connected to the drill rig body (200) to continue the drilling operation; S600. As the drilling continues to deepen, continuously connect one section of the extension drill pipe (300) after another; S700. When the detection end (700) detects groundwater or methane, stop the drilling operation; S800. Separate the disengaged drill pipe (400) from the plugging drill pipe (500), and the plugging drill pipe (500) remains in the borehole to play a plugging role.

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