A thermal melting drilling device capable of collecting rock debris in ice holes while drilling

Abstract

The present invention provides a thermal melting drilling device capable of collecting rock debris in ice holes during drilling, belonging to the technical field of polar ice sheet drilling. It includes an outer pipe, a drill bit body, a waterproof motor, a driving screw, a push rod, a first limit switch, a second limit switch, an upper cover, a drill bit body, a heat insulation liner, a core pipe, a hot water pipe, an electric heating drill bit and a joint; when the core pipe moves up to the upper limit position, the inclined surface of the electric heating drill bit just completely enters the heat insulation liner and blocks the internal channel of the heat insulation liner; when the core pipe moves down to the lower limit position, the inclined surface of the electric heating drill bit just completely exposes outside the heat insulation liner, opening the internal channel of the heat insulation liner. The ice core is used to provide thrust for the rock debris, enabling it to enter the core pipe and fall into the interior of the drilling device under the action of the inclined surface of the electric heating drill bit. The structure is simple, and it can collect the rock debris wrapped in the ice core with high efficiency of rock debris collection.

Description

Technical Field

[0001] The present invention belongs to the technical field of polar ice sheet drilling, and relates to a melt drilling device, in particular to a melt drilling device capable of collecting rock debris in an ice hole while drilling. Background Art

[0002] Because the interior of the Antarctic continent is perennially covered by an ice sheet, obtaining subglacial bedrock samples is difficult. Currently, only three countries have obtained subglacial rock samples from the Antarctic margin, while subglacial bedrock sampling in the Antarctic interior remains unsuccessful. The rock fragments contained within the impure ice layer overlying the Antarctic inland subglacial lakes are most likely subglacial rock particles or subglacial sediments entrained during ice sheet movement. Analysis can reveal the lithology and tectonic history of the Antarctic continent's bedrock. Therefore, if the impurities within the ice can be collected during scientific drilling of subglacial lakes, it will provide valuable samples for the study of Antarctic subglacial geology. Currently, no hot melt drilling equipment, domestically or internationally, is capable of collecting rock particles encountered while drilling. Summary of the Invention

[0003] The purpose of the present invention is to solve the problem that rock debris encountered in ice cannot be collected during hot melt drilling, and a hot melt drilling device that can collect rock debris in ice holes while drilling is proposed. The device can simultaneously realize hot melt drilling of ice layers and collection of rock debris in ice while drilling without changing the drill bit, thus solving the problem that rock debris cannot be collected during hot melt drilling.

[0004] The technical solution adopted by the present invention to achieve the above object is as follows: A thermal melting drilling device capable of collecting rock debris in an ice hole during drilling, including an outer tube and a drill bit body. The drill bit body is located below the outer tube, and the two are coaxially arranged and fixedly connected. It also includes a waterproof motor, a driving screw, a push rod, a first limit switch, a second limit switch, an upper cover, a drill bit body, a heat insulation liner tube, a core tube, a hot water pipe, an electric heating drill bit, and a joint. The upper end of the driving screw is coaxially connected to the output shaft of the waterproof motor through a coupling. The lower part of the driving screw is processed with threads and is threadedly matched with the central hole of the push rod. When the driving screw rotates, the push rod can move up or down along the driving screw under the action of the thread thrust. The first limit switch and the second limit switch are respectively fixed to the lower part of the push rod through a first limit switch bracket and a second limit switch bracket. The start and stop of the waterproof motor are controlled according to the feedback signals of the first limit switch and the second limit switch, so as to limit the up and down movement range of the push rod. An upper cover is arranged above the drill bit body. The drill bit body and the upper cover are coaxially arranged and are fixed together by screws. The center of the drill bit body and the upper cover has a central hole for the core tube to pass through. The core tube can move up and down freely in the central holes of the drill bit body and the upper cover. Multiple inclined hot water channels are processed inside the drill bit body, and the multiple inclined hot water channels are evenly arranged around the central axis of the drill bit body. The lower part of the upper cover has a boss, and a second sealing ring is installed on the boss. A first sealing ring is installed on the outside of the upper cover to seal the gap between the upper cover and the drill bit body, so as to form a sealed annular cavity between the lower part of the upper cover and the drill bit body. The upper part of the joint is threadedly connected to the hot water pipe. The sealed annular cavity formed among the hot water pipe, the joint, the lower part of the upper cover, and the drill bit body is interconnected with the inclined hot water channels inside the drill bit body. The bottom lip surface of the core tube is arc-shaped, and the outer surface above the bottom lip surface of the core tube is conical, so that the hot water sprayed from the inclined hot water channels of the drill bit body is deflected through the conical surface of the core tube. The inside of the core tube is hollow, and a heat insulation liner tube is coaxially installed on the inner wall of the core tube. The upper part of the core tube is fixedly connected to the second limit switch bracket by screws. The bottom of the electric heating drill bit is a slope, and an electric heating rod is inserted inside the electric heating drill bit. The outer diameter of the electric heating drill bit and the inner diameter of the heat insulation liner tube are in tolerance fit. When the waterproof motor drives the core tube to move up to the upper limit position through the coupling, the driving screw, the push rod, and the second limit switch bracket, the slope of the electric heating drill bit just completely enters the heat insulation liner tube and blocks the internal channel of the heat insulation liner tube. When the waterproof motor drives the core tube to move down to the lower limit position through the coupling, the driving screw, the push rod, and the second limit switch bracket, the slope of the electric heating drill bit just completely exposes outside the heat insulation liner tube, so that the internal channel of the heat insulation liner tube is opened.

[0005] Further, a motor fixing plate and an electric heating drill bit fixing plate are arranged up and down inside the outer tube. The motor fixing plate, the electric heating drill bit fixing plate, and the outer tube are coaxially arranged. The edges of the motor fixing plate and the electric heating drill bit fixing plate are respectively connected to the inner wall of the outer tube by screws.

[0006] A circular hole through which the power supply wires of the electric heating rod, the first limit switch, and the second limit switch pass is provided at the center of the motor fixing plate. A through hole through which the hot water pipe passes is also provided on the motor fixing plate. At the same time, an annular boss is provided on the motor fixing plate, and a bearing for supporting the driving screw is installed inside the annular boss; the waterproof motor is fixed above the annular boss by screws.

[0007] The center of the electric heating drill fixing plate has a central hole through which the electric heating drill passes, and is fixedly connected to the electric heating drill by screws. One side of the electric heating drill fixing plate has a circular hole through which the hot water pipe passes, and the other side has a circular hole through which the push rod passes. A circular hole through which the power supply wires of the first limit switch and the second limit switch pass is provided beside the central hole.

[0008] Further, the upper part of the drill bit body is placed inside the outer pipe, and the upper part of the drill bit body is connected to the outer pipe by screws.

[0009] Further, a circular hole is provided on the upper cover. The upper part of the circular hole is threadedly connected to the joint, and the inside of the joint is communicated with the circular hole. The lower part of the circular hole is communicated with the sealed annular cavity formed between the lower part of the upper cover and the drill bit body.

[0010] Further, when the core tube is in the upper limit position, the hot water jet ejected from the inclined hot water flow channel of the drill bit body will not be blocked by the bottom of the core tube, and the hot water jet directly sprays onto the axis of the drill bit, so that all the ice layers at the bottom of the drill bit are melted by the hot water; when the core tube is in the lower limit position, the hot water jet ejected from the inclined hot water flow channel of the drill bit body will spray onto the conical outer surface of the core tube and be reflected by the conical outer surface to change the flow direction, so that the ice layer protected by the inner hole of the core tube cannot be melted, and thus an ice core is formed.

[0011] When the first limit switch touches the electric heating drill fixing plate, the core tube is in the upper limit position; when the second limit switch touches the upper cover, the core tube is in the lower limit position.

[0012] Through the above design, the present invention can bring the following beneficial effects:

[0013] The hot melting drilling device provided by the present invention for collecting rock debris in the ice hole during drilling uses the up and down movement of the core tube to change the hot water melting ice range, and can realize full-hole hot water drilling and collection of rock debris heated and melted by hot water during drilling without changing the drill bit.

[0014] The present invention uses the ice core to provide thrust for the rock debris, so that the rock debris enters the core tube and falls into the inside of the drilling device under the action of the inclined surface of the electric heating drill. The structure is simple, and the rock debris wrapped in the ice core can be collected, and the collection efficiency of the rock debris is high.

[0015] The present invention solves the problem that rock debris cannot be collected during hot-melt drilling, fills the gap in the device for collecting rock debris while drilling in ice, and the obtained samples can provide valuable samples for the study of subglacial geology in Antarctica. Description of the Drawings

[0016] The drawings described herein are used to provide a further understanding of the present invention, form a part of this application, and the illustrative embodiments and descriptions of the present invention are used to understand the present invention, and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 is a schematic structural diagram of a hot-melt drilling device for collecting rock debris in an ice hole while drilling proposed by the present invention;

[0018] Figure 2 is a schematic structural diagram of the hot-melt drilling device for collecting rock debris in an ice hole while drilling of the present invention when collecting rock debris.

[0019] The marks in the figure are as follows: 1 - outer pipe; 2 - waterproof motor; 3 - coupling; 4 - motor fixing plate; 5 - bearing; 6 - driving screw; 7 - push rod; 8 - electric heating drill fixing plate; 9 - first limit switch; 10 - first limit switch bracket; 11 - second limit switch bracket; 12 - second limit switch; 13 - upper cover; 14 - drill body; 15 - heat insulation lining pipe; 16 - core pipe; 17 - hot water pipe; 18 - electric heating rod; 19 - electric heating drill; 20 - joint; 21 - first sealing ring; 22 - second sealing ring; 23 - inclined hot water flow channel. Detailed Embodiments

[0020] To more clearly illustrate the present invention, the present invention will be further described below in conjunction with preferred embodiments and drawings. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not be used to limit the protection scope of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should have the ordinary meaning understood by those of ordinary skill in the art to which the present invention belongs.

[0021] In order to avoid confusing the essence of the present invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0022] Such as Figure 1 and Figure 2As shown in the figure, a thermal melting drilling device capable of collecting rock debris in an ice hole during drilling includes an outer pipe 1, a waterproof motor 2, a coupling 3, a motor fixing plate 4, a bearing 5, a driving screw 6, a push rod 7, an electric heating drill fixing plate 8, a first limit switch 9, a first limit switch bracket 10, a second limit switch bracket 11, a second limit switch 12, an upper cover 13, a drill bit body 14, a heat insulation lining pipe 15, a core pipe 16, a hot water pipe 17, an electric heating rod 18, an electric heating drill 19, a joint 20, a first sealing ring 21 and a second sealing ring 22.

[0023] The motor fixing plate 4 and the electric heating drill fixing plate 8 are located inside the outer pipe 1 and are coaxially arranged. The edges of the motor fixing plate 4 and the electric heating drill fixing plate 8 are connected to the inner wall of the outer pipe 1 by screws. Circular holes are provided at the center and one side of the motor fixing plate 4. The circular hole at the center of the motor fixing plate 4 is used for the power supply wires of the electric heating rod 18, the first limit switch 9 and the second limit switch 12 to pass through, and the circular hole at one side of the motor fixing plate 4 is used for the hot water pipe 17 to pass through. An annular boss is provided on the other side of the motor fixing plate 4 for connecting the waterproof motor 2, and a bearing 5 is installed inside the annular boss for supporting the driving screw 6. The waterproof motor 2 is fixed on the annular boss of the motor fixing plate 4 by screws. The output shaft of the waterproof motor 2 is coaxially connected to the driving screw 6 through the coupling 3 and can drive the coupling 3 and the driving screw 6 to rotate. The lower part of the driving screw 6 is processed with threads and is in threaded cooperation with the central hole of the push rod 7. When the driving screw 6 rotates, the push rod 7 will move up or down along the driving screw 6 under the action of the threads. The center of the electric heating drill fixing plate 8 has a central hole for the electric heating drill 19 to pass through and is fixed to the electric heating drill 19 by screws. A circular hole for the hot water pipe 17 to pass through is provided on one side of the electric heating drill fixing plate 8, and a circular hole for the push rod 7 to pass through is provided on the other side. A circular hole for the power supply wires of the first limit switch 9 and the second limit switch 12 to pass through is provided beside the central hole. Four deep holes for inserting the electric heating rods 18 are provided inside the electric heating drill 19, and the four electric heating rods 18 are respectively inserted into the electric heating drill 19. The bottom of the electric heating drill 19 is a bevel. The lower part of the push rod 7 is respectively fixed to the first limit switch bracket 10 and the second limit switch bracket 11 by screws. The first limit switch 9 is fixed to the first limit switch bracket 10 by threads, and the second limit switch 12 is fixed to the second limit switch bracket 11 by threads. The feedback signals of the first limit switch 9 and the second limit switch 12 will be used to control the start and stop of the waterproof motor 2, so as to limit the moving range of the push rod 7 up and down.

[0024] The drill bit body 14 is located below the outer pipe 1 and they are coaxially arranged. The upper part of the drill bit body 14 is placed inside the outer pipe 1, and the upper part of the drill bit body 14 is connected to the outer pipe 1 by screws. Above the drill bit body 14 is coaxially arranged with the upper cover 13, and the upper cover 13 is fixed on the drill bit body 14 by screws. The drill bit body 14 and the upper cover 13 have a central hole for the core pipe 16 to pass through. The core pipe 16 can move freely up and down in the central holes of the drill bit body 14 and the upper cover 13. Inside the drill bit body 14, a plurality of inclined hot water channels 23 are machined so that hot water can flow through them and spray out of the drill bit body 14. The plurality of inclined hot water channels 23 are evenly arranged around the central axis of the drill bit body 14. It should be noted that in the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. The lower part of the upper cover 13 has a boss, and a second sealing ring 22 is installed on the boss. A first sealing ring 21 is installed on the outside of the upper cover 13 to seal the gap between the upper cover 13 and the drill bit body 14, so as to form a sealed annular cavity between the lower part of the upper cover 13 and the drill bit body 14. One side of the upper cover 13 has a round hole. The upper part of the round hole is threadedly connected to the joint 20, and the lower part of the round hole is connected to the sealed annular cavity formed between the lower part of the upper cover 13 and the drill bit body 14. The joint 20 is threadedly connected to the hot water pipe 17 above. The sealed annular cavity formed among the hot water pipe 17, the joint 20, the lower part of the upper cover 13 and the drill bit body 14 is interconnected with the inclined hot water channels 23 of the drill bit body 14.

[0025] The bottom lip surface of the core pipe 16 is arc-shaped, so that after encountering rock debris during drilling, the arc-shaped bottom lip surface can provide a certain guiding effect for the rock debris, enabling it to smoothly enter the core pipe 16. The outer surface above the bottom lip surface of the core pipe 16 is conical. The hot water sprayed out from the inclined hot water channels 23 of the drill bit body 14 is deflected through the conical surface of the core pipe 16. The inside of the core pipe 16 is hollow, and a heat insulation lining pipe 15 is coaxially installed on the inner wall of the core pipe 16 to protect the ice core entering the core pipe 16 and prevent the ice core from melting excessively. The upper part of the core pipe 16 is fixedly connected to the second limit switch bracket 11 by screws.

[0026] The outer diameter of the electric drill bit 19 and the inner diameter of the heat insulation lining pipe 15 are in tolerance fit. When the waterproof motor 2 drives the core pipe 16 to move up to the upper limit position through the coupling 3, the drive screw 6, the push rod 7 and the second limit switch bracket 11, the inclined surface of the electric drill bit 19 just completely enters the heat insulation lining pipe 15 and blocks the internal channel of the heat insulation lining pipe 15. When the waterproof motor 2 drives the core pipe 16 to move down to the lower limit position through the coupling 3, the drive screw 6, the push rod 7 and the second limit switch bracket 11, the inclined surface of the electric drill bit 19 just completely exposes outside the heat insulation lining pipe 15, opening the internal channel of the heat insulation lining pipe 15.

[0027] When the core pipe 16 is in the upper limit position, the hot water jet ejected from the inclined hot water flow channel 23 of the drill bit body 14 will not be blocked by the bottom of the core pipe 16, and the hot water jet can directly spray onto the axis of the drill bit body 14, so that all the ice layers at the bottom of the drill bit body 14 are melted by the hot water; when the core pipe 16 is in the lower limit position, the hot water jet ejected from the inclined hot water flow channel 23 of the drill bit body 14 will spray onto the conical outer surface of the core pipe 16 and be reflected by the conical outer surface to change the flow direction, so that the ice layer protected by the inner hole of the core pipe 16 cannot be melted, and then an ice core is formed.

[0028] When the first limit switch 9 touches the electric heating drill bit fixing plate 8, the core pipe 16 is in the upper limit position; when the second limit switch 12 touches the upper cover 13, the core pipe 16 is in the lower limit position.

[0029] Furthermore, both the core pipe 16 and the electric heating drill bit 19 are made of metals with high thermal conductivity coefficients such as copper and aluminum alloy to improve the ice melting rate.

[0030] The working principle of the present invention:

[0031] Before drilling, the heat-melting drilling device provided by the present invention for collecting rock debris in the ice hole during drilling first controls the waterproof motor 2 to drive the coupling 3 and the drive screw 6 to rotate. Under the action of the thread lift force, the push rod 7 will drive the core pipe 16 and the heat insulation liner 15 to move upward through the second limit switch bracket 11. When the first limit switch 9 touches the electric heating drill bit fixing plate 8, a signal will be sent to the waterproof motor 2 to stop the waterproof motor 2 from rotating. At this time, the core pipe 16 is in the upper limit position, and the bottom slope of the electric heating drill bit 19 completely enters the heat insulation liner 15 and seals the heat insulation liner 15.

[0032] When starting to drill, hot water is introduced into the hot water pipe 17. The hot water will flow through the hot water pipe 17 and the joint 20 into the annular cavity formed by the upper cover 13 and the drill bit body 14, and spray from the inclined hot water flow channel 23 of the drill bit body 14 towards the bottom of the drill bit. Since the core pipe 16 is in the upper limit position, the hot water ejected from the inclined hot water flow channel 23 of the drill bit body 14 is not blocked by the core pipe 16, and multiple hot water jets will converge at the center below the core pipe 16 and melt the ice layer to achieve full-hole drilling.

[0033] After encountering rock debris in the ice, due to the scouring action of the hot water jet, the rock debris will be melted out of the ice and deposited at the bottom of the borehole, resulting in a slower drilling speed. At this time, by controlling the waterproof motor 2 to drive the coupling 3 and the drive screw 6 to rotate, under the action of the thread thrust, the push rod 7 will drive the core tube 16 and the heat insulation liner 15 to move downward through the second limit switch bracket 11. When the second limit switch 12 touches the upper cover 13, a signal will be sent to the waterproof motor 2 to stop the waterproof motor 2 from rotating. At this time, the core tube 16 is in the lower limit position, and the bottom slope of the electric heating drill bit 19 is completely exposed from the heat insulation liner 15. At the same time, the power supply of the electric heating rod 18 is controlled to make the electric heating rod 18 heat up and heat the electric heating drill bit 19. At this time, the hot water ejected from the inclined hot water flow channel 23 of the drill bit body 14 will be blocked by the conical outer surface at the lower part of the core tube 16, and the hot water flow direction will change from the original central jet to the jet around the core tube 16, so as to ensure that the ice layer in the center of the core tube 16 is not scoured to form an ice core. The ice layer between the core tube 16 and the hole wall is melted by the hot water, and the core tube 16 heated by the hot water scouring will heat up and melt the ice layer directly below the core tube 16. During the descent of the drilling device, the rock debris deposited at the bottom of the hole will be pushed into the interior of the core tube 16. At this time, since the ice layer protected by the core tube 16 is not scoured by the hot water, an ice core will be formed at the bottom of the hole. During the descent of the drilling device, the ice core will continuously push the rock debris upward until the rock debris reaches the bottom slope position of the electric heating drill bit 19. Under the action of the slope of the electric heating drill bit 19, the rock debris will fall into the annular gap between the core tube 16 and the outer tube 1. At the same time, after the ice core contacts the slope of the electric heating drill bit 19, the ice core will be melted by the electric heating drill bit 19, and the rock debris wrapped in the ice core will be released and fall into the annular gap between the core tube 16 and the outer tube 1, thus realizing the collection of rock debris while drilling.

[0034] When the drilling device completely passes through the ice layer containing rock debris, the waterproof motor 2 can be controlled to rotate to lift the core tube 16 to the upper limit position again to achieve rapid full-hole drilling.

Claims

1. A thermal melting drilling device capable of collecting rock debris in an ice hole during drilling, comprising an outer pipe (1) and a drill bit body (14), the drill bit body (14) being located below the outer pipe (1), the two being coaxially arranged and fixedly connected, characterized in that, It also includes a waterproof motor (2), a drive screw (6), a push rod (7), a first limit switch (9), a second limit switch (12), an upper cover (13), a drill bit body (14), a heat insulation liner (15), a core pipe (16), a hot water pipe (17), an electric heating drill bit (19) and a joint (20); the upper end of the drive screw (6) is coaxially connected to the output shaft of the waterproof motor (2) through a coupling (3), the lower part of the drive screw (6) is processed with threads and is in threaded fit with the central hole of the push rod (7), when the drive screw (6) rotates, the push rod (7) can move up or down along the drive screw (6) under the action of the thread thrust; the first limit switch (9) and the second limit switch (12) are respectively fixed to the lower part of the push rod (7) through a first limit switch bracket (10) and a second limit switch bracket (11), and the start and stop of the waterproof motor (2) are controlled according to the feedback signals of the first limit switch (9) and the second limit switch (12), so as to limit the up and down movement range of the push rod (7); an upper cover (13) is arranged above the drill bit body (14), the drill bit body (14) and the upper cover (13) are coaxially arranged and are fixed together by screws, the center of the drill bit body (14) and the upper cover (13) has a central hole for the core pipe (16) to pass through, the core pipe (16) can move up and down freely in the central holes of the drill bit body (14) and the upper cover (13), and a plurality of inclined hot water channels (23) are processed inside the drill bit body (14), and the plurality of inclined hot water channels (23) are uniformly arranged around the central axis of the drill bit body (14); the lower part of the upper cover (13) has a boss, a second sealing ring (22) is installed on the boss, and a first sealing ring (21) is installed on the outside of the upper cover (13) to seal the gap between the upper cover (13) and the drill bit body (14), so as to form a sealed annular cavity between the lower part of the upper cover (13) and the drill bit body (14); the upper part of the joint (20) is in threaded connection with the hot water pipe (17), and the sealed annular cavity formed among the hot water pipe (17), the joint (20), the lower part of the upper cover (13) and the drill bit body (14) is communicated with the inclined hot water channels (23) inside the drill bit body (14); the bottom lip surface of the core pipe (16) is arc-shaped, the outer surface above the bottom lip surface of the core pipe (16) is conical, so that the hot water ejected from the inclined hot water channels (23) of the drill bit body (14) is deflected through the conical surface of the core pipe (16), the inside of the core pipe (16) is hollow, and a heat insulation liner (15) is coaxially installed on the inner wall of the core pipe (16), and the upper part of the core pipe (16) is fixedly connected to the second limit switch bracket (11) by screws;The bottom of the electric heating drill bit (19) is beveled. An electric heating rod (18) is inserted inside the electric heating drill bit (19). The outer diameter of the electric heating drill bit (19) and the inner diameter of the heat insulation liner (15) are in a tolerance fit. When the waterproof motor (2) drives the core pipe (16) to move upward to the upper limit position through the coupling (3), the drive screw (6), the push rod (7) and the second limit switch bracket (11), the bevel of the electric heating drill bit (19) just completely enters the heat insulation liner (15) and blocks the internal channel of the heat insulation liner (15); when the waterproof motor (2) drives the core pipe (16) to move downward to the lower limit position through the coupling (3), the drive screw (6), the push rod (7) and the second limit switch bracket (11), the bevel of the electric heating drill bit (19) just completely exposes outside the heat insulation liner (15), so that the internal channel of the heat insulation liner (15) is opened.

2. The hot-melt drilling device capable of collecting rock debris in ice holes while drilling according to claim 1, wherein: Inside the outer tube (1), a motor fixing plate (4) and an electrothermal drill bit fixing plate (8) are arranged vertically. The motor fixing plate (4), the electrothermal drill bit fixing plate (8), and the outer tube (1) are coaxially arranged. The edges of the motor fixing plate (4) and the electrothermal drill bit fixing plate (8) are respectively connected to the inner wall of the outer tube (1) by screws.

3. The hot-melt drilling device capable of collecting rock debris in the ice hole during drilling according to claim 2, wherein: A round hole through which the power supply wires of the heating rod (18), the first limit switch (9), and the second limit switch (12) pass is provided at the center of the motor fixing plate (4). A through hole through which the hot water pipe (17) passes is also provided on the motor fixing plate (4). At the same time, an annular boss is provided on the motor fixing plate (4), and a bearing (5) for supporting the driving screw (6) is installed inside the annular boss; the waterproof motor (2) is fixed above the annular boss by screws.

4. The hot-melting drilling device capable of collecting rock debris in the ice hole during drilling according to claim 2, characterized in that: The center of the electrothermal drill bit fixing plate (8) has a central hole through which the electrothermal drill bit (19) passes and is fixedly connected to the electrothermal drill bit (19) by screws. One side of the electrothermal drill bit fixing plate (8) has a round hole through which the hot water pipe (17) passes, and the other side has a round hole through which the push rod (7) passes. A round hole through which the power supply wires of the first limit switch (9) and the second limit switch (12) pass is provided beside the central hole.

5. The hot-melting drilling device capable of collecting rock debris in the ice hole while drilling according to claim 1, characterized in that: The upper part of the drill bit body (14) is placed inside the outer tube (1), and the upper part of the drill bit body (14) is connected to the outer tube (1) by screws.

6. The hot-melt drilling device capable of collecting rock debris in the ice hole during drilling according to claim 1, wherein: A round hole is provided on the upper cover (13). The upper part of the round hole is threadedly connected to the joint (20), and the inside of the joint (20) is communicated with the round hole. The lower part of the round hole is connected to the sealed annular cavity formed between the lower part of the upper cover (13) and the drill bit body (14).

7. The hot-melt drilling device capable of collecting rock debris in the ice hole while drilling according to claim 1, characterized in that: When the core tube (16) is in the upper limit position, the hot water jet ejected from the inclined hot water flow channel (23) of the drill bit body (14) will not be blocked by the bottom of the core tube (16), and the hot water jet directly sprays onto the drill bit axis, so that all the ice layers at the bottom of the drill bit are melted by the hot water; when the core tube (16) is in the lower limit position, the hot water jet ejected from the inclined hot water flow channel (23) of the drill bit body (14) will spray onto the conical outer surface of the core tube (16) and be reflected by the conical outer surface to change the flow direction, so that the ice layer protected by the inner hole of the core tube (16) cannot be melted, and then an ice core is formed.

8. The hot-melting drilling device capable of collecting rock debris in the ice hole during drilling according to claim 2, characterized in that: When the first limit switch (9) touches the electrothermal drill bit fixing plate (8), the core tube (16) is in the upper limit position; when the second limit switch (12) touches the upper cover (13), the core tube (16) is in the lower limit position.

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