Moon water-ice in-situ drilling and heating drilling tool and water-ice resource mining device

Abstract

The invention discloses a lunar water-ice in-situ drilling and heating drilling tool and a water-ice resource mining device, and relates to the technical field of in-situ water-ice resource mining. The device comprises a drill rod, the diameter of the drill rod is gradually increased from the bottom end to the top end, a drill bit is detachably installed at the bottom end of the drill rod, double-spiral groove structures are formed in the outer surface of the drill bit and the outer surface of the drill rod, and the double-spiral groove structures of the drill bit and the drill rod are matched with each other after installation. Through the variable-diameter structural design of the drill rod, the outer diameter of the drill rod is gradually enlarged from the bottom to the top, in the drilling process, the lunar soil on the hole wall is effectively compacted by utilizing the lateral extrusion force of the subsequent large-diameter rod section on the formed drill hole, and the gap between the drill rod and the hole wall is eliminated; the problem of heat loss caused by extremely low lunar soil heat conductivity and a vacuum gap thermal resistance effect is solved, meanwhile, the scheme that a heating rod and a segmented thermocouple are arranged in a hollow drill rod is adopted, uniform heating of the whole drill rod is achieved, and key information such as water and ice escape time inversion is achieved through temperature change measured by the thermocouple.

Description

Technical Field

[0001] This invention relates to the field of in-situ water ice resource extraction technology, specifically to a lunar water ice in-situ drilling heating drill and water ice resource extraction device. Background Technology

[0002] Lunar water ice is considered a crucial in-situ resource for supporting long-term lunar habitation and deep space exploration missions. Water can not only serve as a direct source of drinking water and oxygen for astronauts' life support systems, but it can also be used to produce liquid hydrogen and liquid oxygen propellants through electrolysis, significantly reducing dependence on Earth resupply. Furthermore, it has significant applications in water resource thermal management and the preparation of lunar soil-based building materials. Comprehensive studies based on lunar remote sensing, isotope analysis of returned samples, and inversion of lunar crater radar data indicate that lunar water ice mainly exists in the permanently shadowed regions at the lunar poles in the form of surface frost and ice-soil mixtures.

[0003] For in-situ exploration and extraction of deep lunar water ice, the mainstream international technical approach currently employs a coupled scheme of "mechanical drilling sampling + in-situ thermally stimulated volatilization". Key technical units involved include modules for drill bit rotation drive, feed pressurization, in-hole heating, and volatile substance capture. In terms of heating methods, existing technical solutions can be summarized into three categories: (1) After the drill bit is drilled to the target depth, the drill rod exposed on the lunar surface is heated by an external heating device. The heat is conducted along the drill rod axis to the ice soil at the bottom of the hole. This method has a long heat transfer path and large heat loss; (2) The resistance heating element is integrated on the outside of the drill rod or drill bit and directly contacts the ice soil in the hole for heating. Although the heat transfer path is shortened, the heating unit is subjected to high contact stress, abrasive wear and alternating hot and cold loads during the drilling process, which poses reliability risks such as insulation failure and short circuit; (3) The indirect heating scheme with a hollow drill rod and a built-in heating rod is adopted. The heat is conducted to the ice soil through the drill rod wall. Although the heating element is protected, its heating efficiency is highly dependent on the thermal conductivity of the drill rod material and the contact state between the drill rod and the hole wall.

[0004] The aforementioned technical approaches all face two common technical bottlenecks: First, the drill bit adopts a cantilever beam working posture, which is prone to lateral swaying during drilling, and the random intrusion of lunar regolith particles causes irregular gaps to form between the drill rod and the borehole wall. In the high vacuum environment of the lunar surface, the thermal resistance effect of these gaps is significant, reducing heat conduction efficiency and severely restricting the thermally induced volatilization efficiency of water ice; Second, existing drill bits lack the ability to perceive the phase change process of ice and regolith in the borehole in real time, and cannot obtain key parameters such as the amount and time of water vapor escape.

[0005] Therefore, this invention proposes a heating drill for in-situ drilling of lunar water ice and a device for mining water ice resources. Summary of the Invention

[0006] The purpose of this invention is to provide a heating drill bit for in-situ drilling of lunar water ice and a water ice resource extraction device to solve the problems mentioned in the background art.

[0007] According to a first aspect of the present invention, in order to achieve the above-mentioned objective, the present invention provides the following technical solution: a lunar water ice in-situ drilling and heating drill bit, comprising a drill rod, wherein the diameter of the drill rod gradually increases from the bottom end to the top end, and a drill bit is detachably installed at the bottom end of the drill rod, wherein the outer surfaces of the drill bit and the drill rod are provided with a double helical groove structure, and the double helical groove structures of the drill bit and the drill rod are mutually compatible after installation. The drill rod has a hollow cavity inside, and a heating rod is coaxially fixed inside the hollow cavity to heat the entire section of the drill rod. Multiple thermocouples are also fixed inside the hollow cavity to monitor the temperature of different areas of the drill rod.

[0008] Furthermore, the drill rod has an overall conical shape, with the difference between the outer diameter of the bottom and top of the drill rod being no less than 2 mm, and the difference in depth between the double helical grooves at the bottom and top being no less than 0.5 mm.

[0009] Furthermore, the top of the drill bit is fixedly connected to a mounting post, and the bottom end of the drill rod is provided with a mounting groove that matches the mounting post. The mounting post and the mounting groove are provided with pin holes at corresponding positions. The mounting post is detachably fixed to the drill rod by means of a pin shaft and pin holes.

[0010] Furthermore, the drill bit is made of GH4169 material, the drill rod is made of 20Cr material, and the bottom end of the drill bit is welded with a drill bit, which is made of Yg6x material.

[0011] Furthermore, the heating rod is arranged along the axial direction of the drill rod, with a distance of 30-60mm between its front end and the drill bit, and the heating rod extends all the way to the helical stop at the end of the drill rod.

[0012] Furthermore, the number of thermocouples is set to three, with the three thermocouples located at the bottom, middle and top of the drill rod, respectively, and holes for installing thermocouples are provided on the side wall of the heating rod.

[0013] Furthermore, the holes for installing the three thermocouples are located at one within a range of 30-60mm from the drill bit, one within a range of 150-200mm from the drill bit, and one within a range of 10-50mm from the spiral stop at the end of the drill rod.

[0014] Furthermore, the heating rod and the thermocouple are fixedly connected by polyimide tape.

[0015] Furthermore, the inner wall of the hollow cavity is filled with thermally conductive silicone grease, and the heating rod and thermocouple are fixed together in the hollow cavity by the thermally conductive silicone grease.

[0016] According to a second aspect of the present invention, the present invention provides a lunar in-situ water ice resource extraction device, comprising a lunar water ice in-situ drilling and heating drill bit described in the first aspect, and further comprising a drive mechanism, wherein the top end of the drill bit rod is mounted on the output end of the drive mechanism.

[0017] The present invention has at least the following beneficial effects: 1. This invention uses a drill rod diameter-adjusting structure design to gradually increase the outer diameter of the drill rod from bottom to top. During drilling, the lateral extrusion force of the subsequent large-diameter rod section on the formed borehole effectively compacts the borehole wall soil, eliminates the gap between the drill rod and the borehole wall, and solves the problem of heat loss caused by the thermal resistance effect of the vacuum gap. At the same time, the hollow drill rod with built-in heating rod is adopted to achieve uniform heating of the entire drill rod, so that the heat can be quickly conducted to the bottom of the borehole.

[0018] 2. This invention adopts a separate design for the drill bit, drill blade, and drill rod. The drill blade is made of GH4169 nickel-based high-temperature alloy material, which, with its high hardness, high strength, and excellent low-temperature toughness and wear resistance, significantly improves the drill bit's ability to break up high-hardness water ice, ice-soil mixtures, and intrusive rock blocks. The drill rod is made of 20Cr material and equipped with a double-starting spiral groove structure, which provides two parallel chip removal channels compared to a single spiral groove, improving chip removal efficiency, enhancing anti-clogging ability, and improving load distribution symmetry, effectively protecting the internal heating rod and thermocouple assembly from circumferential stress damage. The drill blade is made of YG6X cemented carbide material, which has high hardness and excellent wear resistance, and can effectively break up hard particles and intrusive rock blocks in lunar water ice and ice-soil mixtures, significantly improving the drill bit's cutting ability and rock breaking efficiency.

[0019] 3. By continuously monitoring the temperature data of thermocouples at the bottom, middle, and top, and especially by analyzing the emergence of specific temperature plateaus and instantaneous changes in temperature differences, this invention can infer the moment when water ice begins to sublimate and preliminarily estimate the rate and total amount of water vapor escape. This makes the phase change process, which was originally difficult to observe directly, measurable and assessable, providing indispensable data support for judging the heating effect and optimizing subsequent extraction processes, and greatly improving the scientific nature and operability of the entire resource utilization task.

[0020] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Enlarged view of the structure at point A in the middle; Figure 3 For the present invention Figure 1 Enlarged view of the structure at point B; Figure 4 This is a side view of the drill pipe structure of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of the structure at point C; Figure 6 For the present invention Figure 4 Enlarged view of the structure at point D; Figure 7 This is a schematic diagram of the drill bit structure of the present invention.

[0022] Figure label: 1. Drill rod; 2. Drill bit; 3. Double helical groove structure; 4. Hollow cavity; 5. Heating rod; 6. Thermocouple; 7. Mounting post; 8. Mounting groove; 9. Pin; 10. Pin hole; 11. Drill cutting edge. Detailed Implementation

[0023] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0024] Please see Figures 1-7 The present invention provides a technical solution: a lunar water ice in-situ drilling and heating drill tool, including a drill rod 1, the diameter of the drill rod 1 gradually increases from the bottom end to the top end, and a drill bit 2 is detachably installed at the bottom end of the drill rod 1. Both the drill bit 2 and the drill rod 1 have double helical groove structures 3 on their outer surfaces, and after the drill bit 2 and the drill rod 1 are installed, the double helical groove structures 3 of the two are mutually compatible. The drill rod 1 has a hollow cavity 4 inside, and a heating rod 5 is coaxially fixed inside the hollow cavity 4 to heat the entire section of the drill rod 1. Multiple thermocouples 6 are also fixedly installed inside the hollow cavity 4 to monitor the temperature of different areas of the drill rod 1.

[0025] The drill rod 1 has an overall conical shape. The difference between the outer diameter of the bottom and top of the drill rod 1 is not less than 2 mm, and the difference between the depth of the double helical grooves at the bottom and top is not less than 0.5 mm. In the technical solution of this embodiment, the outer diameter of the bottom of the drill rod 1 is set to 9 mm, the depth of the double helical groove structure 3 is 0.75 mm, the outer diameter of the top of the drill rod 1 is set to 12 mm, and the depth of the double helical groove structure 3 is extended to 1.25 mm. With this design, the overall shape of the drill rod 1 is conical. During the drilling process, the later-entering, larger-diameter part of the drill rod 1 will generate a continuous, outward lateral squeezing force on the hole wall formed by the previously smaller-diameter drill rod 1. This dynamic "filling and compaction" effect can eliminate the gap between the drill rod 1 and the hole wall to the maximum extent, ensuring that the outer wall of the drill rod 1 is in close contact with the surrounding water-ice-moon soil mixture. Furthermore, the synchronous increase in the depth of the spiral grooves, in conjunction with the change in diameter, ensures the unobstructed and consistent chip removal channel throughout the entire drilling depth. The gradually increasing depth of the spiral grooves provides a stronger chip removal capacity, enabling timely transport of debris from the bottom of the borehole to the surface. This effectively prevents the risk of drill string "jamming" or blockage caused by poor chip removal in narrow borehole conditions. Secondly, the dual-starting spiral groove design, compared to a single spiral structure, provides a more symmetrical force distribution along the circumference. This symmetry significantly reduces the potential swaying or vibration of the drill string when drilling in high-hardness water ice, improving the stability of the drilling process. This not only protects the delicate heating and temperature sensing elements inside drill pipe 1 from damage by asymmetrical loads but also enhances the robustness of the entire drilling system in complex working conditions in the unknown lunar soil environment.

[0026] Regarding the technical solution of this embodiment, the top of the drill bit 2 is fixedly connected with a mounting post 7, and the bottom end of the drill rod 1 is provided with a mounting groove 8 that is compatible with the mounting post 7. The mounting post 7 and the mounting groove 8 are provided with pin holes 10 at corresponding positions. The mounting post 7 is detachably fixed to the drill rod 1 by a pin shaft 9 and a pin hole 10. Specifically, drill rod 1 and drill bit 2 adopt a split design, allowing each to independently select the best-performing materials according to their distinct working conditions. For example, drill bit 2 is made of GH4169 material, while drill rod 1 is made of 20Cr material. Drill bit 2 directly impacts and breaks hard water ice and lunar soil, requiring extremely high hardness, wear resistance, and impact toughness. Therefore, high-temperature alloys like GH4169 are used to ensure the sharpness and durability of its "teeth." On the other hand, the core task of drill rod 1 is to efficiently conduct heat and remove debris, requiring excellent thermal conductivity and a certain torsional strength. Therefore, materials with better thermal conductivity, such as 20Cr, can be selected. Through the precise matching of mounting post 7 and mounting groove 8, and then fastened with pin 9, these two material components with different properties are successfully and firmly combined into a whole, achieving a perfect unity of "drilling performance" and "heating efficiency." Compared with an integral structure, it has significant advantages in drilling effect and later disassembly and maintenance. Furthermore, the bottom end of the drill bit 1 is fixedly connected to a drill bit 11, which is made of YG6x material. YG6X (WC-Co cemented carbide): its chemical composition is mainly WC (tungsten carbide) and Co is used as a binder. It is formed into a hard and brittle ceramic-metal composite through powder metallurgy sintering. It has strong wear resistance and is suitable for use as a cutting edge. Therefore, the drill bit 11 is made of YG6x material, which can effectively break hard particles and intrusive rocks in lunar water ice and ice-soil mixtures, and significantly improve the drilling tool's cutting ability and rock breaking efficiency.

[0027] Furthermore, the reason why the pin 9 and the pin hole 10 are used to achieve the connection in this embodiment is that the cooperation between the mounting post 7 and the mounting groove 8 provides stable radial positioning, effectively resists bending moment, and the pin 9 can bear the main shearing action, efficiently transmitting the drilling torque from the drill rod 1 to the drill bit 2. This connection form avoids the loosening and seizing problems that may exist with threaded connections, and also overcomes the compatibility problems between different materials and the defects of non-repairability that may occur with welded connections.

[0028] The heating rod 5 is arranged along the axial direction of the drill rod 1, with a distance of 30-60mm between its front end and the drill bit 2. In the technical solution of this embodiment, its front end is 30mm away from the drill bit 2 and extends to the spiral stop at the end of the drill rod 1. This layout can form a uniform, stable and axially wide columnar thermal field around the drill rod 1. The heat can diffuse radially and uniformly outward, allowing water ice in a larger volume range to synchronously and stably heat up and undergo phase change, greatly improving the utilization efficiency of thermal energy and the integrity of the volatilization process. The reason for setting a distance between the heating rod 5 and the drill bit 2 is that this distance provides a valuable thermal buffer for the drill bit 2, which bears the most severe mechanical impact. This effectively prevents the material from annealing and softening that may occur when the drill bit 2 is too close to the heat source during drilling, thereby always maintaining the high hardness and rock-breaking ability of its tip. Furthermore, this built-in layout, combined with the variable diameter design of drill pipe 1 and the separate material selection for drill pipe 1 and drill bit 2, creates a perfect synergy. The high thermal conductivity of drill pipe 1 helps dissipate heat from the heating rod 5 to the surrounding environment, while the variable diameter design ensures close contact between drill pipe 1 and the borehole wall, minimizing contact thermal resistance. This allows heat energy to be transferred most efficiently from the internal heat source to the external target, rather than being dissipated in vain. Thus, energy efficiency is maximized under the harsh conditions of extremely low temperatures and high vacuum on the lunar surface. At the same time, the drill bit 11 welded to the bottom of drill bit 1 has high bonding strength and can withstand impact loads and alternating stresses during drilling, preventing the cutting edge from falling off or cracking. Meanwhile, the good rigidity of cemented carbide helps maintain the stability of the drilling direction, reduces vibration damage to the internal heating rod and thermocouple, and improves overall reliability.

[0029] In this embodiment, the number of thermocouples 6 is set to three. The three thermocouples 6 are located at the bottom, middle and top of the drill rod 1, respectively. The heating rod 5 has holes for installing thermocouples 6 on its side wall. The holes for installing the three thermocouples can be located at one within a range of 30-60mm from the drill bit, one within a range of 150-200mm from the drill bit, and one within a range of 10-50mm from the spiral cut-off end of the drill rod. Furthermore, the holes for installing three thermocouples 6 are located 30 mm from the drill bit, 180 mm from the drill bit, and 36 mm from the top of the drill rod 1, respectively. The three thermocouples 6 form a joint temperature monitoring layout for the bottom, middle, and top regions of the drill rod 1. Due to the thermal volatilization of lunar water ice, the phase transition of water ice and its upward escape in the form of water vapor will cause temperature fluctuations in the area around the drill rod 1. By continuously monitoring the temperature data of the bottom, middle, and top thermocouples 6, especially analyzing the occurrence of specific temperature values ​​and instantaneous changes in temperature differences, the moment when water ice begins to sublimate can be deduced, and the rate and total amount of water vapor escape can be preliminarily estimated. This makes the phase transition process, which was originally difficult to observe directly, measurable and assessable, providing indispensable data support for judging the heating effect and optimizing the subsequent extraction process, and greatly improving the scientificity and operability of the entire resource utilization task. It should be noted that this embodiment does not specifically limit the type, quantity, or installation location of thermocouples 6, and can be adapted to the actual situation. It is worth noting that regardless of the type, quantity, or installation location of thermocouples 6, they all fall within the protection scope of this embodiment.

[0030] In this embodiment, the heating rod 5 and the thermocouple 6 are fixedly connected by polyimide tape to form a whole. During the drilling process of the drill bit into the hard water-ice-moon soil mixture, it will continuously bear complex vibration, impact and torsional stress. The polyimide tape has a certain degree of flexibility and elastic modulus. Its fixing method is not a rigid connection, but forms a flexible "wrap" and "pad". This flexible fixing plays a key role in buffering and damping. It can absorb and attenuate some of the mechanical vibration and impact energy transmitted from the drill rod 1, and prevent these violent forces from acting directly on the brittle heating rod 5 and thermocouple 6, effectively avoiding damage to the heating rod 5 and thermocouple 6.

[0031] Regarding the technical solution of this embodiment, the inner wall of the hollow cavity 4 is filled with thermally conductive silicone grease, which is a paste-like material with a thermal conductivity much higher than that of air. It can perfectly fill all the microscopic and macroscopic assembly gaps between the heating rod 5, the thermocouple 6 and the inner wall of the drill rod 1, so that heat can flow very smoothly from the inside to the entire drill rod 1, and then be tightly transferred to the surrounding lunar regolith water ice through the variable diameter design of the drill rod 1.

[0032] The principle and process of using this invention: First, assemble the drill bit. Use polyimide tape to fix the thermocouple 6 and the heating rod 5. Then, fill the drill rod 1 with thermally conductive silicone grease. Next, push the connected thermocouple 6 and heating rod 5 from the end of the drill rod 1 to the predetermined position at the front end. Then, insert the mounting post 7 of the drill bit 2 into the mounting groove 8 at the end of the drill rod 1. Finally, use the pin 9 to insert into the pin hole 10 to achieve installation and fixation. Subsequently, drilling heating of the drill bit was carried out. First, the drill bit was controlled by an external drive device to drill into the lunar water ice at a rotation speed of 150 rpm and a feed speed of 20 mm / min. After drilling to 300 mm, the rotation was stopped, and then the heating rod 5 was turned on to heat the water ice to a temperature of 300℃. The heat was transferred to the surrounding lunar regolith water ice through the drill rod 1. After the solid water ice reached a certain temperature, it began to sublimate into water vapor and escape upwards. The amount and time of water vapor escape were deduced by the temperature difference of the thermocouple 6.

[0033] Example 2: According to a second aspect of the present invention, the present invention provides a lunar in-situ water ice resource extraction device, comprising a lunar water ice in-situ drilling and heating drill bit described in the first aspect, and further comprising a drive mechanism, wherein the top end of the drill bit rod 1 is mounted on the output end of the drive mechanism.

[0034] It should be noted that the lunar water ice in-situ drilling heating drill and other parts of the lunar in-situ water ice resource extraction device provided in this application can be designed, manufactured, and sold separately, or they can be assembled together and then sold as a whole. Whether they are individual units formed before assembly or as a whole formed after assembly, they all fall within the protection scope of this application.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances. When an element is referred to as being "assembled on," "mounted on," "fixed to," or "set on" another element, it may be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0038] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A lunar water ice in-situ drill and heat drill tool comprising a drill pipe, characterized by, The diameter of the drill rod gradually expands from the bottom end to the top end, and the bottom end of the drill rod is detachably mounted with a drill bit, both the drill bit and the outer surface of the drill rod are provided with double helical groove structures, and the double helical groove structures of the drill bit and the drill rod are adapted to each other after installation. The inside of the drill rod is provided with a hollow cavity, and a heating rod is coaxially and fixedly installed in the hollow cavity for heating the whole section of the drill rod, and a plurality of thermocouples are fixedly installed in the hollow cavity for monitoring the temperature of different regions of the drill rod.

2. The lunar water ice in-situ drilling and heating drill tool of claim 1, wherein: The overall configuration of the drill rod is conical, the difference between the outer diameters of the bottom and the top of the drill rod is not less than 2mm, and the difference between the depths of the double helical grooves of the bottom and the top is not less than 0.5mm.

3. The lunar water ice in-situ drill heating drill string of claim 2, wherein: The top of the drill bit is fixedly connected with a mounting column, the bottom end of the drill rod is provided with a mounting groove matched with the mounting column, and the corresponding positions of the mounting column and the mounting groove are provided with pin holes, and the mounting column is detachably fixed on the drill rod through the pin shaft and the pin hole.

4. The lunar water ice in-situ drill heating drill string of claim 3, wherein: The drill bit is made of GH4169 material, the drill rod is made of 20Cr material, the bottom end of the drill bit is welded with a drill blade, and the drill blade is made of Yg6x material.

5. The lunar water ice in-situ drill and heating drill tool of claim 3, wherein: The heating rod is arranged axially along the drill rod, and the distance between the front end of the heating rod and the drill bit is 30-60mm, and the heating rod extends to the helical stop at the end of the drill rod.

6. The lunar water ice in-situ drill heating drill string of claim 5, wherein: The number of thermocouples is three, and the three thermocouples are respectively located at the bottom, middle and top regions of the drill rod, and the side wall of the heating rod is provided with hole positions for installing thermocouples.

7. The lunar water ice in-situ drill heating drill string of claim 6, wherein: The hole positions for installing the three thermocouples are respectively located within 30-60mm from the drill bit, within 150-200mm from the drill bit, and within 10-50mm from the helical stop at the end of the drill rod.

8. The lunar water ice in-situ drill heating drill string of claim 7, wherein: The heating rod and the thermocouples are fixedly connected through a polyimide adhesive tape.

9. The lunar water ice in-situ drill heating drill string of claim 8, wherein: The inner wall of the hollow cavity is filled with thermal conductive silicone grease, and the whole of the heating rod and the thermocouples fixed after the heating rod and the thermocouples are fixed is fixed in the hollow cavity through the thermal conductive silicone grease.

10. A lunar in-situ water ice resource exploitation device comprising a lunar water ice in-situ drilling and heating drill according to any one of claims 1 to 9, characterized in that, Further comprising a driving mechanism, and the top end of the drill rod is mounted on the output end of the driving mechanism.

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