A lunar permanent shadow area water ice resource exploitation device and method

Abstract

The application discloses a lunar permanent shadow area water ice resource exploitation device and method, and belongs to the field of lunar in-situ resource utilization. The device is arranged on one side of a moving platform and comprises a feeding mechanism. The feeding mechanism comprises a lifting screw nut movable plate, a rotary drive mechanism and a heating extraction mechanism are arranged on the screw nut movable plate. The heating extraction mechanism comprises a plurality of circumferentially uniformly distributed drill needles, and an alternating coil is arranged on the outer side of the drill needle. The rotary drive mechanism comprises a rotary drive motor capable of driving the drill needle to rotate. After the drill needle is drilled into the lunar soil, the ice is heated to evaporate and vaporize. The device further comprises 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 the water vapor into the condensation collection mechanism for condensation collection. The device overcomes the problem that the existing lunar soil water ice exploitation method has a small effective heating range for deep lunar soil, low water ice exploitation efficiency and difficulty in being applied to lunar large-scale water ice extraction.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of lunar in-situ resource utilization, and particularly relates to a lunar permanent shadow area water ice resource mining device and method. BACKGROUND

[0002] Water ice, as an important resource of the moon, is a basic guarantee for the construction and operation of future lunar bases. Developing the water ice resources of the moon can solve the problem of water supply for astronauts in exploration missions. 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 water from lunar soil, and oxygen can be used as a life support material or an oxidizing agent in 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 dispersedly present in the subsoil lunar soil within a meter range from the lunar surface. However, the permanent shadow area is always in the dark, and the temperature is as low as about 40K, which poses great challenges to the mining and extraction of water ice resources in the harsh environment.

[0004] In recent years, domestic and foreign research teams have proposed various technical solutions for the mining of water ice resources in the permanent shadow area. The mainstream methods include two kinds. One is to mine lunar soil and extract it in a different place by centralized heating, that is, to mine lunar soil by mechanical means and transfer it to a specific device for centralized heating to collect the volatilized water vapor. This method needs to overcome the mechanical strength of lunar soil permafrost and rock, which increases the difficulty of developing mining equipment and is not suitable for large-scale mining. The other is in-situ extraction in the crater, which is based on the principle of heating the water ice in the lunar soil to volatilize it in-situ, and then collecting it through a capture module. Typical cases include the tent-type heat extraction scheme and the drilling and heating extraction scheme. The tent-type heat extraction has defects such as poor mobility of the device, and can only heat the surface layer of lunar soil. The existing device design in the drilling and heating scheme usually uses a single spiral rod to drill into the lunar soil, and the method of sealing and heating collection after sampling. This method has problems such as complex structure and operation procedure, and small sampling amount per operation, which makes it difficult to meet the demand of large-scale mining.

[0005] Therefore, there is an urgent need for a water ice mining device suitable for large-scale water ice mining and high extraction efficiency. SUMMARY

[0006] In view of the deficiencies of the prior art, the purpose of the present application is to provide a lunar permanent shadow area water ice resource mining device and method to solve the problems in the prior art.

[0007] The purpose of the present application can be achieved by the following technical solutions:

[0008] The application discloses a device for exploiting water ice resources in a lunar permanent shadow area, which is arranged on one side of a mobile platform and comprises a feeding mechanism, wherein the feeding mechanism comprises a lifting screw nut movable plate, a rotary drive mechanism arranged on the lifting screw nut movable plate and a heating and extracting mechanism; the heating and extracting mechanism comprises a plurality of drill needles which are uniformly distributed in a circumferential direction, and an alternating coil is arranged outside the drill needles; the rotary drive mechanism comprises a rotary drive motor which can drive the drill needles to rotate; and the drill needles can vaporize ice water when drilling into ice-containing lunar soil.

[0009] The device further comprises a water vapor transfer mechanism and a condensation and collection mechanism, wherein the water vapor transfer mechanism is arranged at a lower end of the device and can guide water vapor into the condensation and collection mechanism to be condensed and recovered.

[0010] Further, the feeding mechanism comprises a lead screw and a guide rod, wherein the guide rod penetrates through the lifting screw nut movable plate in a vertical direction and is slidably connected with the lifting screw nut movable plate, the lead screw penetrates through the lifting screw nut movable plate in the vertical direction and is threadedly connected with the lifting screw nut movable plate, and a driving motor is arranged at a top of the lead screw to drive the lead screw to rotate.

[0011] Further, the rotary drive mechanism further comprises a constant force coil spring, wherein an end of the constant force coil spring is fixed on the rotary drive motor, and a starting end of the constant force coil spring is fixed on the lifting screw nut movable plate.

[0012] When no drilling operation is performed, the rotary drive motor is tightly attached to the lifting screw nut movable plate under the action of the constant force coil spring; when drilling operation is performed, the drill needles are subjected to resistance of the lunar soil, so that the rotary drive motor is lifted up by overcoming the pulling force of the constant force coil spring, and the constant force coil spring is pulled to be unfolded.

[0013] Further, the heating and extracting mechanism further comprises an induction heating controller, which controls the alternating coil to heat the drill needles passing through the alternating coil by generating alternating current.

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

[0015] Further, the water vapor transfer mechanism comprises a water vapor transfer cavity arranged at a lower end of the device, and the water vapor transfer cavity is in a semispherical dome shape; a water vapor inlet is formed at a top of the water vapor transfer cavity, and a water vapor diffusion channel is connected to the water vapor inlet; water vapor enters the water vapor transfer cavity and is guided into the condensation and collection mechanism through the water vapor diffusion channel to be condensed and recovered.

[0016] Further, the condensation and collection mechanism comprises a water vapor collection valve, condensation fins and heat dissipation fins, wherein the water vapor collection valve is arranged on the water vapor diffusion channel to control the flow of water vapor; the condensation fins capture water vapor in a solid state, and the heat dissipation fins are distributed on an outer surface of the collection mechanism to radiate heat to the universe, so that the temperature of the condensation fins is reduced.

[0017] Further, the water vapor diffusion channel, the water vapor transfer cavity and the outer side of the water vapor collection valve are provided with a heat preservation layer, and an outer side heating power supply is arranged to heat the heat preservation layer.

[0018] A lunar permanent shadow water ice resource exploitation method uses the lunar permanent shadow water ice resource exploitation device, and comprises the following steps:

[0019] S1, the whole exploitation device is driven to descend to the lunar surface, the lower end of the water vapor transfer cavity is embedded into the ice-containing lunar soil surface layer to form a quasi-closed space;

[0020] S2, the driving drill rod is started to rotate;

[0021] S3, the driving screw nut movable plate is driven to descend, and the drill needle drills into the ice-containing lunar soil;

[0022] S4, after the drill needle reaches the target drilling depth, the drill needle is controlled to stop feeding and rotating, the alternating current coil is powered on to intermittently heat the drill needle, the solid state of the ice-containing lunar soil around the drill needle sublimates to form water vapor, the water vapor is driven upward to the water vapor transfer cavity under the pressure difference, and the water vapor enters the water vapor transfer channel through the water vapor inlet at the top of the cavity;

[0023] S5, the outer side heating power supply is turned on to heat the heat preservation layer to 30 DEG C and maintain at 25-30 DEG C, and the water vapor collection valve is opened, the water vapor is induced by the temperature field and the pressure difference, flows to the condensation collection mechanism from the water vapor transfer channel, and is captured by the condensation fin to condense;

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

[0025] S7, the driving drill needle is started to reverse and ascend, and the drill needle is separated from the lunar soil to return to the initial position.

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

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

[0028] In S4, the heating temperature of the drill needle is 300 DEG C.

[0029] The present application has the following advantages:

[0030] 1. The thermal conductivity of the lunar soil is extremely low, and the mechanical strength of the ice-containing lunar soil at low temperature is very high, a group needle type lunar water ice exploitation and extraction device is provided in the present application, a plurality of hard and slender drill needles are adopted, a circumferentially uniform and centrally coupled spatial arrangement mode is adopted, a coupled temperature field is constructed in the deep lunar soil, and the problems of low water ice volatilization efficiency and difficult extraction caused by the low thermal conductivity of the lunar soil can be avoided.

[0031] 2、The independent constant force drilling drive of the feeding drive carrying each drill needle is designed in the application, and multiple drill needles can be synchronously drilled into the lunar soil profile under single drive control path. When a drill needle encounters hard rock and the resistance and the drilling pressure reach a balance, the drill needle can stop drilling alone, while the remaining drill needles can normally feed and drill into the lunar soil, thereby improving the reliability of single water-ice mining operation.

[0032] 3、The high-temperature water vapor exchanges heat with the low-temperature fins inside the condenser, and as the temperature decreases, the water vapor changes into a solid frost layer and is adsorbed on the surface of the fins. The circumferentially distributed condensing fin structure design is adopted in the application, 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 stability of the device. At the same time, the outer surface of the condenser is provided with vertical heat dissipation fins, which further increase the radiation cooling area and accelerate the temperature reduction of the condenser, so that the water vapor can be continuously captured by the fin cold traps without an additional cold source.

[0033] 4、The device designed in the application adopts group needle type in-situ heating extraction, and compared with the prior art, the single water-ice mining amount is larger, and the device is carried on a mobile platform, so that mobile water-ice mining operation in the lunar permanent shadow area can be realized, and the device has more advantages than the prior art in meeting the demand of future large-scale water-ice mining tasks. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0035] Figure 1 is a schematic diagram of the overall structure of the water-ice resource mining device of the application;

[0036] Figure 2 is a schematic diagram of the cross-sectional structure of the water-ice resource mining device of the application;

[0037] Figure 3 is a schematic diagram of the internal structure of the condensing and collecting mechanism of the application;

[0038] Figure 4 is a schematic diagram of the internal structure of the water vapor transfer mechanism of the application;

[0039] Figure 5 is a schematic diagram of the operation process of the water-ice resource mining device of the application.

[0040] In the diagram: 1-Feeding mechanism, 11-Drive motor, 12-Lead screw, 13-Lead screw nut movable plate, 2-Drilling drive mechanism, 21-Rotary drive motor, 22-Constant force coil spring, 3-Heating extraction mechanism, 31-Drill bit, 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-Heat dissipation fins, 6-Ice-containing lunar soil, 7-Moving platform. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Example 1

[0043] like Figures 1 to 2 As shown, a device for mining water ice resources in the permanently shadowed area of ​​the moon is installed on one side of a mobile platform 7. It includes a feeding mechanism 1, a rotary drive mechanism 2, and a heating extraction mechanism 3. The feeding mechanism 1 can drive the heating extraction mechanism 3 to rise and drill. The rotary drive mechanism 2 provides rotational force to the drill bit in the heating extraction mechanism 3, so that the drill bit in the heating extraction mechanism 3 can drill into the lunar ice soil for heating extraction.

[0044] The feeding mechanism 1 includes a movable silk mother plate 13 that can be raised and lowered. The rotary drive mechanism 2 is installed on the movable silk mother plate 13. The heating and extraction mechanism 3 includes a plurality of drill bits 31 that are evenly distributed in the circumference. An alternating coil 32 is sleeved on the outside of the drill bit 31 and heats the drill bit 31. The movable silk mother plate 13 descends, driving the plurality of drill bits 31 to descend and drill. Under the action of the rotary drive mechanism 2, the drill bits 31 are heated and drill into the ice-moon soil, heating and vaporizing the ice-moon soil 6 around the drill bit 31.

[0045] In this embodiment, the feed mechanism 1 includes a lead screw 12 and a guide rod. The guide rod passes through the movable lead screw plate 13 vertically and is slidably connected to it, serving to guide the lifting and lowering movement of the movable lead screw plate 13. The lead screw 12 passes through the movable lead screw plate 13 vertically and is threadedly connected to it. A drive 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 movable lead screw plate 13, so as to realize the synchronous drilling of multiple drill bits 31 under a single drive 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 bit 31 and drives the drill bit 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 drilling is not in progress, the rotary drive motor 21 is pressed tightly against the movable plate 13 of the nut under the action of the constant force coil spring 22; as Figure 5 As shown, during drilling operations, the drill bit 31 receives resistance from the lunar soil, causing the rotary drive motor 21 to overcome the tension of the constant force coil spring 22 and be lifted up. The constant force coil spring 22 is pulled out, and at this time the drill bit 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 center of the drill bit 31, and the heating frequency, time, power and other parameters are adjustable.

[0049] Furthermore, in this embodiment, there are five drill bits 31, each passing through a circular hole on the lead screw nut movable plate 13 and distributed circumferentially on the outside of the lead screw 12, enabling independent drilling by each drill bit. A cutting edge is provided at the end of the drill bit 31 closest to the lunar surface, allowing drilling into the lunar regolith to the depth where water ice exists. The drill bit 31 has an embedded copper core, enabling efficient heat transfer under vacuum and low temperature conditions. Moreover, this device is mounted at the end of the mobile platform 7, enabling mobile, repetitive operations within the permanently shadowed areas of the moon.

[0050] The lunar permanent shadow area water ice resource mining device 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 and recovery.

[0051] like Figure 4 As shown, the water vapor transfer mechanism 4 includes a water vapor transfer cavity 43 located at the lower end of the device. The interior of the water vapor transfer cavity 43 is a hemispherical dome chamber with a smooth inner surface. A water vapor inlet 42 is opened at the top of the water vapor transfer cavity 43, and a water vapor diffusion channel 41 is connected to the water vapor inlet 42. After the ice in the ice-containing lunar soil 6 is heated and vaporized by the drill bit 31, it enters the water vapor transfer cavity 43 and is guided by the water vapor diffusion channel 41 into the condensation collection mechanism 5 for condensation and recovery.

[0052] In this embodiment, the water vapor transfer cavity 43 near the lunar soil side adopts a multi-stage flexible sealing ring design, which can be embedded into the lunar soil surface to form a seal and 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 for capturing water vapor inside the condensation collection mechanism, and a heat dissipation fin 53 for reducing the temperature of the condensation fin 52 by radiating heat. 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 condensation fin 52 adopts a louver-shaped pleated design to effectively increase the specific surface area and achieve continuous condensation of water vapor.

[0055] In addition, the water vapor diffusion channel 41, the water vapor transfer cavity 43, and the outer side of the water vapor collection valve 51 are each provided with a heat preservation layer, and an external heating power source is provided to heat and preserve the entire water vapor transfer and delivery process, thereby preventing the water vapor from being liquefied or sublimed before reaching the condensation collection mechanism.

[0056] Embodiment 2

[0057] Based on the lunar permanent shadow area water ice resource exploitation device proposed in Embodiment 1, this embodiment proposes a lunar permanent shadow area water ice resource exploitation method, which specifically includes the following steps:

[0058] S1, the device is lowered to the lunar surface, and the lower end of the water vapor transfer cavity 43 is embedded in the ice-containing lunar soil surface layer to form a quasi-closed space.

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

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

[0061] S4, after the drill bit 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 alternating coil 32 is powered on, the alternating coil 32 intermittently heats the drill bit 31, and the heating temperature is 300℃. The drill bit 31 is pulse heated, the heat is conducted to the deep lunar soil, the solid state of the surrounding ice-containing lunar soil begins to sublimate to form water vapor, the water vapor is driven upward by the pressure difference 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, the external heating power source is turned on to heat the heat preservation layer to 30℃ and maintain it at 25-35℃; the water vapor collection valve 51 of the condensation collection mechanism 5 is opened, the water vapor is induced by the temperature field and the pressure difference, flows from the water vapor transfer channel 41 to the condensation collection mechanism 5, and is captured by the low-temperature condensation fin 52 to condense.

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

[0064] S7, the rotary drive motor 21 and the feeding drive motor 11 are started, at this time, the drill needle 31 is reversed, the rotary drive motor 21 and the drill needle 31 are lifted by the screw nut movable plate 13, the drill needle 31 is separated from the moon soil and returns to the initial position.

[0065] In the description of the present specification, the description referring to the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative expressions of the above terms do 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 basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only illustrative of the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A device for exploiting water ice resources in the lunar permanent shadow, provided on one side of a mobile platform (7), characterized in that, The device comprises a feeding mechanism (1), the feeding mechanism (1) comprises a liftable nut movable plate (13), a rotary drive mechanism (2) and a heating extraction mechanism (3) are arranged on the nut movable plate (13); the heating extraction mechanism (3) comprises a plurality of circumferentially uniformly distributed drill needles (31), the outer side of the drill needle (31) is sleeved with an alternating coil (32); the rotary drive mechanism (2) comprises a rotary drive motor (21) capable of driving the drill needle (31) to rotate; the drill needle (31) drills into the ice-moon soil to vaporize the ice water; 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 can guide the water vapor into the condensation collection mechanism (5) for condensation and recovery; The water vapor transfer mechanism (4) comprises a water vapor transfer cavity (43) arranged at the lower end of the device, the inside of the water vapor transfer cavity (43) is a semispherical dome chamber; a water vapor inlet (42) is formed at the top of the water vapor transfer cavity (43), and a water vapor diffusion channel (41) is connected to the water vapor inlet (42); the water vapor enters the water vapor transfer cavity (43) and is guided into the condensation collection mechanism (5) through the water vapor diffusion channel (41) for condensation and recovery; The condensation collection mechanism (5) comprises a water vapor collection valve (51), a condensation fin (52) and a heat dissipation fin (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 fin (52) converts the water vapor into a solid state for capture, and the heat dissipation fin (53) is distributed on the outer surface of the condensation collection mechanism (5) to radiate heat to the universe, thereby reducing the temperature of the condensation fin (52).

2. The device for exploiting water ice resources in the permanently shadowed region of the moon according to claim 1, characterized in that, The feeding mechanism (1) comprises a lead screw (12) and a guide rod, the guide rod penetrates through the nut movable plate (13) along the vertical direction and is in sliding connection with the nut movable plate (13), the lead screw (12) penetrates through the nut movable plate (13) along the vertical direction and is in threaded connection with the nut movable plate (13), 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 permanently shadowed region of the moon according to claim 1, characterized in that, The rotary drive mechanism (2) further comprises a constant force coil spring (22), the constant force coil spring (22) is fixed at the end of the rotary drive motor (21) and at the starting end of the nut movable plate (13); When the drilling operation is not performed, the rotary drive motor (21) is tightly attached to the nut movable plate (13) under the action of the constant force coil spring (22); when the drilling operation is performed, the drill needle (31) is subjected to the resistance of the moon soil, so that the rotary drive motor (21) is lifted up by overcoming the tension of the constant force coil spring (22), and the constant force coil spring (22) is pulled and expanded.

4. The device for exploiting water ice resources in the permanently shadowed region of the moon according to claim 1, characterized in that, The heating extraction mechanism (3) further comprises an induction heating controller (33) for controlling the alternating coil (32) to heat the drill needle (31) passing therethrough by generating alternating current.

5. The device for exploiting water ice resources in the permanently shadowed region 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 moon surface, and a copper core is embedded in the drill needle (31).

6. The device for exploiting water ice resources in the permanently shadowed region of the moon according to claim 1, characterized in that, The outer side of the water vapor diffusion channel (41), the water vapor transfer cavity (43) and the water vapor collection valve (51) is provided with a heat preservation layer, and an outer side heating power supply is arranged to heat and preserve the heat preservation layer.

7. A method for exploiting water ice resources in the lunar permanent shadow area, using the device for exploiting water ice resources in the lunar permanent shadow area according to claim 6, characterized in that, The device comprises the following steps: S1, drive the whole mining device to descend to the lunar surface, and embed the lower end of the water vapor transfer cavity (43) into the ice-containing lunar soil surface layer to form a quasi-closed space; S2, start driving the drill needle (31) to begin rotating; S3, drive the silk nut movable plate (13) to descend, and drill the needle (31) into the ice-containing lunar soil; S4, after the drill needle (31) reaches the target drilling depth, control the drill needle (31) to stop feeding and rotating, power on the alternating current coil (32) to intermittently heat the drill needle (31), and the solid state sublimation in the ice-containing lunar soil around the drill needle (31) forms water vapor, which is driven upward by pressure difference to diffuse to the water vapor transfer cavity (43), enters the water vapor transfer channel (41) through the water vapor inlet (42) at the top of the cavity, and is captured by the condensing fin (52) to condense; S5, open the external heating power supply, heat the heat preservation layer to 30°C, and maintain it at 25-35°C; open the water vapor collection valve (51), and the water vapor is induced by the temperature field and pressure difference to flow from the water vapor transfer channel (41) to the condensing collection mechanism (5), and is captured by the condensing fin (52) to condense; S6, after the pressure in the condensing collection mechanism (5) is stable, close the water vapor collection valve (51), 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 to return to the initial position.

8. The method of claim 7, wherein, In S2, the rotating speed of the drill needle (31) is 200 rpm; In S3, the descending speed of the silk 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 needle (31) is 300°C.

Images