Device and method for exploiting water and ice resources in permanent shadow area of moon

Abstract

The invention discloses a device and a method for exploiting water-ice resources in a permanent shadow area of the moon, and belongs to the field of utilization of in-situ resources of the moon. The water and ice resource mining device for the permanent shadow area of the moon is arranged on one side of a movable platform and comprises a feeding mechanism, the feeding mechanism comprises a nut movable plate capable of ascending and descending, and a rotary driving mechanism and a heating extraction mechanism are arranged on the nut movable plate; the heating extraction mechanism comprises a plurality of drill pins which are uniformly distributed in the circumferential direction, and the outer sides of the drill pins are sleeved with alternating coils; the rotary driving mechanism comprises a rotary driving motor capable of driving the drill point to rotate; after the drill point drills into lunar soil, heating to volatilize and vaporize ice; the device further comprises a water vapor transfer mechanism and a condensation collection mechanism, and the water vapor transfer mechanism is located at the lower end of the device and can guide water vapor into the condensation collection mechanism to be condensed and collected. The problems that an existing lunar soil water-ice mining method is small in effective heating range of deep lunar soil, low in water-ice mining efficiency and difficult to be suitable for large-scale water-ice extraction of the moon are solved.

Description

Technical Field

[0001] The present invention belongs to the field of lunar in-situ resource utilization, and specifically relates to a device and method for exploiting water ice resources in a permanent shadow zone of the moon. Background Art

[0002] As an important resource of the moon, water ice is the basic guarantee for the construction and operation of the future lunar base. Developing the water ice resources on the moon can solve the problem of water supply for astronauts during exploration missions. At the same time, after water is decomposed into hydrogen and oxygen, hydrogen can be used as liquid hydrogen or hydrogen-based propellant, a reducing agent for extracting oxygen or making water from lunar soil, and oxygen can be used as an oxidant in life support materials or propellants.

[0003] According to remote sensing detection, sample analysis and theoretical speculation, lunar water ice resources may exist in large quantities in the permanent shadow craters in the polar regions, and are dispersed in the subsurface lunar soil within a meter range from the lunar surface. However, there is no sunlight in the permanent shadow area all year round, and the temperature is as low as about 40K. The harsh environment poses a great challenge to the mining and extraction of water ice resources.

[0004] In recent years, domestic and foreign research teams have proposed various technical solutions for the exploitation of water ice resources in permanent shadow areas. The mainstream methods include two: one is to extract the lunar soil by centralized heating in a different place after mining, that is, to mine the lunar soil by mechanical means and transfer it to a specific device for centralized heating to collect volatile water vapor. This method needs to overcome the mechanical strength of the lunar soil permafrost, which is equivalent to that of rock, which increases the difficulty of developing mining equipment and is not suitable for large-scale mining; the second is in-situ extraction in the pit. The principle is to volatilize the water ice in the lunar soil by in-situ heating, and then collect it through a capture module. Typical cases include tent-type thermal extraction schemes and drilling heating extraction schemes. Among them, the tent-type thermal extraction has defects such as poor device mobility and can only heat the surface of the lunar soil. The existing device design in the drilling heating scheme usually uses a single spiral rod to drill into the lunar soil, and the sampling is sealed and heated for collection. There are problems such as complex structure and operating procedures and small sampling volume in a single operation, which makes it difficult to meet the needs of large-scale mining.

[0005] Therefore, there is an urgent need for a water ice mining device that is suitable for large-scale water ice mining and has high extraction efficiency. Summary of the invention

[0006] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a device and method for exploiting water ice resources in the permanent shadow zone of the moon, which solves the problems in the prior art.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] A water ice resource mining device in a permanent shadow area of ​​the moon is arranged on one side of a mobile platform, comprising a feeding mechanism, the feeding mechanism comprising a screed movable plate capable of being raised and lowered, a rotary driving mechanism and a heating and extracting mechanism being arranged on the screed movable plate; the heating and extracting mechanism comprising a plurality of drill needles uniformly distributed in the circumferential direction, an alternating coil being arranged on the outer side of the drill needle; the rotary driving mechanism comprising a rotary driving motor capable of driving the drill needle to rotate; the drill needle drilling into the ice-containing lunar soil can vaporize the ice water;

[0009] The device also includes a water vapor transfer mechanism and a condensation collection mechanism. The water vapor transfer mechanism is located at the lower end of the device and can guide water vapor into the condensation collection mechanism for condensation recovery.

[0010] Furthermore, the feeding mechanism includes a lead screw and a guide rod. The guide rod penetrates the nut movable plate along the vertical direction and is slidably connected thereto. The lead screw penetrates the nut movable plate along the vertical direction and is threadedly connected thereto. A driving motor is provided at the top of the lead screw to drive the lead screw to rotate.

[0011] Furthermore, the rotary drive mechanism further comprises a constant force coil spring, the end of which is fixed to the rotary drive motor, and the starting end of which is fixed to the nut movable plate;

[0012] When drilling operations are not carried out, under the action of the constant force coil spring, the rotary drive motor is tightly attached to the nut movable plate; during drilling operations, the drill needle is subjected to resistance from the lunar soil, causing the rotary drive motor to overcome the pulling force of the constant force coil spring and be lifted up, and the constant force coil spring is pulled and unfolded.

[0013] Furthermore, the heating and extraction mechanism also includes an induction heating controller, which generates an alternating current to control the alternating coil to heat the drill needle passing through it.

[0014] Furthermore, a cutting edge is arranged at one end of the drill needle close to the lunar surface, and a copper core is embedded in the drill needle.

[0015] Furthermore, the water vapor transfer mechanism includes a water vapor transfer cavity arranged at the lower end of the device, and the interior of the water vapor transfer cavity is a hemispherical dome chamber; a water vapor inlet is opened at the top of the water vapor transfer cavity, and the water vapor inlet is connected to a water vapor diffusion channel; water vapor enters the water vapor transfer cavity, and is introduced into the condensation collection mechanism through the water vapor diffusion channel for condensation recovery.

[0016] Furthermore, the condensation collection mechanism includes a water vapor collection valve, condensation fins and heat dissipation fins. The water vapor collection valve is installed on the water vapor diffusion channel to control the flow of water vapor; the condensation fins convert the water vapor into a solid state for capture, and the heat dissipation fins are distributed on the outer surface of the collection mechanism to dissipate heat into the universe through thermal radiation, thereby reducing the temperature of the condensation fins.

[0017] Furthermore, the outer sides of the water vapor diffusion channel, the water vapor transfer cavity, and the water vapor collection valve are all provided with a heat-insulating layer, and an outer heating power supply is provided to heat and insulate the heat-insulating layer.

[0018] A method for mining water ice resources in a permanent shadow area of ​​the moon, using the above-mentioned device for mining water ice resources in a permanent shadow area of ​​the moon, comprises the following steps:

[0019] S1, driving the mining device to descend to the lunar surface as a whole, with the lower end of the water vapor transfer chamber embedded in the surface layer of lunar soil containing ice, forming a quasi-enclosed space;

[0020] S2, start driving the drill pipe to start rotating;

[0021] S3, drive the nut movable plate down, and the drill bit drills into the icy lunar soil;

[0022] S4, after the drill needle reaches the target drilling depth, the drill needle is controlled to stop feeding and rotating, and the AC coil is energized to intermittently heat the drill needle. The solid in the icy lunar soil around the drill needle sublimates to form water vapor. The water vapor is driven by the pressure difference to diffuse upward to the water vapor transfer cavity and enter the water vapor transfer channel through the water vapor inlet on the top of the cavity;

[0023] S5, turning on the outer heating power supply to heat the insulation layer to 30°C and maintaining it at 25-30°C; turning on the water vapor collection valve, the water vapor is induced by the temperature field and the pressure difference, flows through the water vapor transfer channel to the condensation collection mechanism, and is captured by the condensation fins to condense;

[0024] S6, when the pressure in the condensation collection mechanism is stable, the water vapor collection valve is closed, thereby completing the water ice collection;

[0025] S7, starts driving the drill bit to reverse and rise, and the drill bit separates from the lunar soil and returns to the initial position.

[0026] Further, in S2, the rotation speed of the drill bit is 200 rpm;

[0027] In S3, the descending speed of the nut movable plate is 150mm / min; the maximum drilling pressure of the drill needle is 40N, and the drilling depth is 300mm;

[0028] In S4, the heating temperature of the drill bit is 300°C.

[0029] Beneficial effects of the present invention:

[0030] 1. The thermal conductivity of lunar soil is extremely low, and the mechanical strength of ice-containing lunar soil at low temperatures is very high. The present invention proposes a group-needle type lunar soil water ice mining and extraction device, which uses multiple hard and slender drill needles to construct a coupled temperature field deep in the lunar soil in a spatial arrangement of circumferential uniform distribution + central coupling. This can avoid problems such as low water ice volatilization efficiency and difficulty in extraction caused by the low thermal conductivity of the lunar soil.

[0031] 2. The feed drive designed in the present invention is equipped with an independent constant force drilling drive for each drill bit, which can realize the synchronous drilling of multiple drill bits into the lunar soil profile under a single drive control path. When a drill bit encounters hard rock and the resistance and drilling pressure reach a balance, it can stop drilling alone, while the remaining drill bits can be fed and drilled normally, which improves the reliability of a single water ice mining operation.

[0032] 3. High-temperature water vapor exchanges heat with low-temperature fins inside the condenser. As the temperature decreases, the water vapor changes into a solid frost layer and adsorbs on the fin surface. The present invention adopts a circumferentially distributed condensing fin structure design, which significantly increases the heat transfer specific surface area, effectively reduces the water vapor partial pressure, and improves the water vapor condensation efficiency and the working stability of the device. At the same time, vertical heat dissipation fins are set on the outer surface of the condenser to further increase the radiation cooling area, accelerate the reduction of the condenser temperature, and ensure that the water vapor can be continuously captured by the fin cold trap without an additional cold source.

[0033] 4. The device design of the present invention adopts a group-needle type in-situ heating extraction. Compared with the existing technical solutions, the single water ice mining volume is larger, and it is carried on a mobile platform, which can realize mobile water ice mining operations in the permanent shadow area of ​​the moon. It has more advantages than the existing technical solutions in meeting the needs of future large-scale water ice mining tasks. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 It is a schematic diagram of the overall structure of the water ice resource exploitation device of the present invention;

[0036] Figure 2 It is a schematic cross-sectional structure diagram of the water ice resource exploitation device of the present invention;

[0037] Figure 3 It is a schematic diagram of the internal structure of the condensation collection mechanism of the present invention;

[0038] Figure 4 is a bottom view schematic diagram of the internal structure of the water vapor transfer mechanism of the present invention;

[0039] Figure 5 It is a schematic diagram of the operation process of the water ice resource exploitation device of the present invention.

[0040] In the figure: 1-feeding mechanism, 11-driving motor, 12-lead screw, 13-nut movable plate, 2-drilling drive mechanism, 21-rotation drive motor, 22-constant force coil spring, 3-heating extraction mechanism, 31-drill needle, 32-alternating coil, 33-induction heating controller, 4-water vapor transfer mechanism, 41-water vapor diffusion channel, 42-water vapor inlet, 43-water vapor transfer cavity, 5-condensation collection mechanism, 51-water vapor collection valve, 52-condensation fins, 53-heating fins, 6-ice-containing lunar soil, 7-mobile platform. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] Example 1

[0043] like Figure 1 to Figure 2 As shown, a water ice resource mining device for the permanent shadow area of ​​the moon is installed on one side of a mobile platform 7, and includes a feeding mechanism 1, a rotary driving mechanism 2 and a heating and extracting mechanism 3. The feeding mechanism 1 can drive the heating and extracting mechanism 3 to rise and fall and drill, and the rotary driving mechanism 2 provides a rotary force for the drill needle in the heating and extracting mechanism 3, so that the drill needle in the heating and extracting mechanism 3 can drill into the ice lunar soil for heating and extraction;

[0044] The feeding mechanism 1 includes a nut movable plate 13 that can be raised and lowered, the rotary drive mechanism 2 is installed on the nut movable plate 13, the heating and extraction mechanism 3 includes a plurality of drill pins 31 that are evenly distributed in the circumferential direction, and an alternating coil 32 is sleeved on the outer side of the drill pins 31 to heat the drill pins 31. The nut movable plate 13 descends, driving the plurality of drill pins 31 to descend and drill, and under the action of the rotary drive mechanism 2, the drill pins 31 are heated and drilled into the icy lunar soil, and the icy lunar soil 6 around the drill pins 31 is heated and vaporized;

[0045] In this embodiment, the feeding mechanism 1 includes a lead screw 12 and a guide rod, which penetrates the nut movable plate 13 in the vertical direction and is slidably connected thereto, and is used to guide the lifting and lowering movement of the nut movable plate 13. The lead screw 12 penetrates the nut movable plate 13 in the vertical direction and is threadedly connected thereto, and a driving motor 11 is provided at the top of the lead screw 12 to drive the lead screw 12 to rotate, thereby driving the lifting and lowering movement of the nut movable plate 13, so as to realize the synchronous drilling of multiple drill needles 31 under a single driving control path;

[0046] In this embodiment, the rotary drive mechanism 2 includes a rotary drive motor 21 and a constant force coil spring 22. The drive shaft of the rotary drive motor 2 is fixed to the drill needle 31 and drives the drill needle 31 to rotate. The end (i.e., the inner end) of the constant force coil spring 22 is fixed to the rotary drive motor 21, and the starting end is fixed to the nut movable plate 13.

[0047] When the drilling operation is not performed, under the action of the constant force coil spring 22, the rotary drive motor 21 is closely attached to the nut movable plate 13; Figure 5 As shown, during the drilling operation, the drill needle 31 receives resistance from the lunar soil, causing the rotary drive motor 21 to overcome the pulling force of the constant force coil spring 22 and be lifted up. The constant force coil spring 22 is pulled and unfolded, and at this time the drill needle 31 is subjected to downward drilling pressure.

[0048] In this embodiment, the heating extraction mechanism 3 also includes an induction heating controller 33, which generates an alternating current to control the alternating coil 32 to heat the drill needle 31 passing through its center, and the heating parameters such as frequency, time, and power are adjustable.

[0049] In addition, in this embodiment, the number of the drill needles 31 is five, which respectively pass through the circular holes on the nut movable plate 13 and are distributed in a circular form on the outside of the lead screw 12, so that each drill needle can drill independently. The drill needle 31 is provided with a cutting edge at one end close to the lunar surface, so that it can drill into the lunar soil to the depth of water ice storage; the drill needle 31 is embedded with a copper core, so that the drill needle can achieve efficient heat transfer under vacuum and low temperature. And the device is mounted at the end of the mobile platform 7, which can realize mobile and repeated operations in the permanent shadow area of ​​the moon.

[0050] The device for exploiting water ice resources in the permanent shadow area of ​​the moon also includes a water vapor transfer mechanism 4 and a condensation collection mechanism 5. The water vapor transfer mechanism 4 is located at the lower end of the device and can guide water vapor into the condensation collection mechanism 5 for condensation recovery.

[0051] like Figure 4 As shown, the water vapor transfer mechanism 4 includes a water vapor transfer cavity 43 arranged at the lower end of the device, the interior of the water vapor transfer cavity 43 is a hemispherical dome cavity, and the inner surface is smooth; a water vapor inlet 42 is opened at the top of the water vapor transfer cavity 43, and the water vapor inlet 42 is connected to a water vapor diffusion channel 41; the ice in the ice-containing lunar soil 6 is heated and vaporized by the drill needle 31, enters the water vapor transfer cavity 43, and is introduced into the condensation collection mechanism 5 through the water vapor diffusion channel 41 for condensation recovery;

[0052] In this embodiment, a multi-stage flexible sealing ring design is adopted on the lunar soil side of the water vapor transfer cavity 43, which can be embedded in the lunar soil surface and form a seal to prevent water vapor from escaping.

[0053] like Figure 3As shown, the condensation collection mechanism 5 includes a water vapor collection valve 51, a condensation fin 52 and a heat dissipation fin 53. The condensation fin 52 is used to capture the water vapor inside the condensation collection mechanism. The heat dissipation fin 53 is used to reduce the temperature of the condensation fin 52 by radiation heat dissipation. The water vapor collection valve 51 is installed on the water vapor diffusion channel 41 to control the flow of water vapor;

[0054] In this embodiment, the condensing fins 52 adopt a louver-shaped pleated design, which effectively increases the specific surface area and can achieve continuous condensation of water vapor.

[0055] In addition, the outer sides of the water vapor diffusion channel 41, the water vapor transfer cavity 43, and the water vapor collection valve 51 are all provided with insulation layers, and by providing an outer heating power supply, the entire process of water vapor transfer and transportation is heated and insulated to prevent the water vapor from liquefying or condensing before reaching the condensation collection mechanism.

[0056] Example 2

[0057] Based on the water ice resource mining device in the permanent shadow area of ​​the moon mentioned in Example 1, in this embodiment, a water ice resource mining method in the permanent shadow area of ​​the moon is proposed, which specifically includes the following steps:

[0058] S1, the entire device descends to the lunar surface, and the lower end of the water vapor transfer chamber 43 is embedded in the surface layer of the lunar soil containing ice, forming a quasi-enclosed space.

[0059] S2, start the rotary drive motor 21, and the drill rod 31 starts to rotate at a rotation speed of 200 rpm.

[0060] S3, start the feed drive motor 11, the nut movable plate 13 moves downward along the screw 12, and the feed speed is 150mm / min; the drill needle 31 realizes drilling of the icy lunar soil under the drilling pressure drive and cutting action of the constant force coil spring 22, with a maximum drilling pressure of 40N and a drilling depth of 300mm.

[0061] S4, after the drill needle 31 reaches the target drilling depth, the rotary drive motor 21 and the feed drive motor 11 are turned off, the induction heater 33 is started, and the AC coil 32 is energized. The AC coil 32 intermittently heats the drill needle 31 at a heating temperature of 300°C. The drill needle 31 is pulse-heated, and the heat is transferred to the deep part of the lunar soil. The solid in the surrounding icy lunar soil begins to sublimate to form water vapor. The water vapor is driven by the pressure difference to diffuse upward to the water vapor transfer cavity 43, and enters the water vapor transfer channel 41 through the water vapor inlet 42 at the top of the cavity.

[0062] S5, turn on the external heating power supply to heat the insulation layer to 30°C and maintain it at 25-35°C; open the water vapor collection valve 51 of the condensation collection mechanism 5, and the water vapor is induced by the temperature field and the pressure difference to flow from the water vapor transfer channel 41 to the condensation collection mechanism 5, and is captured by the low-temperature condensation fins 52 to condense.

[0063] S6, when the pressure in the condensation collection mechanism 5 is stable, the water vapor collection valve 51 is closed, thereby completing the water ice collection;

[0064] S7, start the rotary drive motor 21 and the feed drive motor 11, at this time the drill needle 31 reverses, the nut movable plate 13 drives the rotary drive motor 21 and the drill needle 31 to lift up, and the drill needle 31 leaves the lunar soil and returns to the initial position.

[0065] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0066] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A device for exploiting water ice resources in the permanent shadow area of ​​the moon, arranged on one side of a mobile platform (7), characterized in that: The invention comprises a feeding mechanism (1), wherein the feeding mechanism (1) comprises a screed movable plate (13) capable of being raised and lowered, and a rotary drive mechanism (2) and a heating and extraction mechanism (3) are arranged on the screed movable plate (13); the heating and extraction mechanism (3) comprises a plurality of drill needles (31) uniformly distributed in the circumferential direction, and an alternating coil (32) is sleeved on the outer side of the drill needle (31); the rotary drive mechanism (2) comprises a rotary drive motor (21) capable of driving the drill needle (31) to rotate; the drill needle (31) can vaporize ice water by drilling into the ice-containing lunar soil; The device further comprises a water vapor transfer mechanism (4) and a condensation collection mechanism (5); the water vapor transfer mechanism (4) is located at the lower end of the device and is capable of guiding water vapor into the condensation collection mechanism (5) for condensation recovery.

2. The device for exploiting water ice resources in the permanent shadow area of ​​the moon according to claim 1, characterized in that: The feeding mechanism (1) comprises a lead screw (12) and a guide rod, wherein the guide rod penetrates a nut movable plate (13) in a vertical direction and is slidably connected thereto, the lead screw (12) penetrates a nut movable plate (13) in a vertical direction and is threadedly connected thereto, and a driving motor (11) is arranged at the top of the lead screw (12) to drive the lead screw (12) to rotate.

3. The device for exploiting water ice resources in the permanent shadow area of ​​the moon according to claim 1, characterized in that: The rotary drive mechanism (2) further comprises a constant force coil spring (22), the end of the constant force coil spring (22) being fixed to the rotary drive motor (21), and the starting end being fixed to the nut movable plate (13); When drilling is not performed, under the action of the constant force coil spring (22), the rotary drive motor (21) is closely attached to the nut movable plate (13); during drilling, the drill needle (31) is subjected to resistance from the lunar soil, so that the rotary drive motor (21) overcomes the pulling force of the constant force coil spring (22) and is lifted up, and the constant force coil spring (22) is pulled and unfolded.

4. The device for exploiting water ice resources in the permanent shadow area of ​​the moon according to claim 1, characterized in that: The heating and extraction mechanism (3) also includes an induction heating controller (33) which generates an alternating current to control the alternating coil (32) to heat the drill needle (31) passing through the coil.

5. The device for exploiting water ice resources in the permanent shadow area of ​​the moon according to claim 1, characterized in that: The drill needle (31) is provided with a cutting edge at one end close to the lunar surface, and a copper core is embedded in the drill needle (31).

6. The device for exploiting water ice resources in the permanent shadow area of ​​the moon according to claim 1, characterized in that: The water vapor transfer mechanism (4) comprises a water vapor transfer cavity (43) arranged at the lower end of the device, the interior of the water vapor transfer cavity (43) is a hemispherical dome cavity; a water vapor inlet (42) is opened at the top of the water vapor transfer cavity (43), and the water vapor inlet (42) is connected to a water vapor diffusion channel (41); water vapor enters the water vapor transfer cavity (43) and is introduced into the condensation collection mechanism (5) through the water vapor diffusion channel (41) for condensation recovery.

7. The device for exploiting water ice resources in the permanent shadow area of ​​the moon according to claim 6, characterized in that: The condensation collection mechanism (5) comprises a water vapor collection valve (51), condensation fins (52) and heat dissipation fins (53). The water vapor collection valve (51) is installed on the water vapor diffusion channel (41) to control the flow of water vapor; the condensation fins (52) convert the water vapor into a solid state for capture; the heat dissipation fins (53) are distributed on the outer surface of the collection mechanism (5) to dissipate heat to the universe by thermal radiation, thereby reducing the temperature of the condensation fins (52).

8. The device for exploiting water ice resources in the permanent shadow area of ​​the moon according to claim 7, characterized in that: The outer sides of the water vapor diffusion channel (41), the water vapor transfer cavity (43) and the water vapor collection valve (51) are all provided with a heat preservation layer, and an outer heating power source is provided to heat and keep the heat preservation layer.

9. A method for mining water ice resources in the permanent shadow area of ​​the moon, using the device for mining water ice resources in the permanent shadow area of ​​the moon as claimed in claim 8, characterized in that: The following steps are involved: S1, driving the mining device as a whole to descend to the lunar surface, and the lower end of the water vapor transfer cavity (43) is embedded in the surface layer of the lunar soil containing ice, forming a quasi-enclosed space; S2, starting to drive the drill rod (31) to start rotating; S3, driving the nut movable plate (13) to descend, and the drill needle (31) drills into the icy lunar soil; S4, after the drill needle (31) reaches the target drilling depth, the drill needle (31) is controlled to stop feeding and rotating, and the AC coil (32) is energized to intermittently heat the drill needle (31), so that the solid in the icy lunar soil around the drill needle (31) sublimates to form water vapor, and the water vapor is driven by the pressure difference to diffuse upward to the water vapor transfer cavity (43), and enters the water vapor transfer channel (41) through the water vapor inlet (42) at the top of the cavity; S5, turning on the outer heating power supply to heat the insulation layer to 30°C and maintaining it at 25-35°C; turning on the water vapor collection valve (51), and the water vapor, induced by the temperature field and the pressure difference, flows through the water vapor transfer channel (41) to the condensation collection mechanism (5), and is captured by the condensation fins (52) to condense; S6, when the pressure in the condensation collection mechanism (5) is stabilized, the water vapor collection valve (51) is closed, thereby completing the water ice collection; S7, start driving the drill needle (31) to reverse and rise, and the drill needle (31) separates from the lunar soil and returns to the initial position.

10. The method for exploiting water ice resources in the permanent shadow area of ​​the moon according to claim 9, characterized in that: In S2, the rotation speed of the drill bit (31) is 200 rpm; In S3, the descending speed of the nut movable plate (13) is 150 mm / min; the maximum drilling pressure of the drill needle (31) is 40 N, and the drilling depth is 300 mm; In S4, the heating temperature of the drill bit (31) is 300°C.

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