CN-122016378-A - In-situ solidification sampling capsule and sampling system for wall of lunar lava pipe

CN122016378ACN 122016378 ACN122016378 ACN 122016378ACN-122016378-A

Abstract

The application relates to an in-situ solidification sampling capsule and sampling system for a lunar lava pipe rock wall, which comprise a penetrating shell, a mixing driving mechanism, a plurality of storage barrels with piston structures, static mixing nozzles and an anchoring structure, wherein a porous injection area which is communicated with the external environment and independent of a containing space is arranged in the middle of the penetrating shell, the mixing driving mechanism is used for driving the piston structures to move in the storage barrels along one end far away from the mixing driving mechanism, the static mixing nozzles are used for mixing multicomponent reagents and then injecting the multicomponent reagents into the rock wall, the solidification effect is improved, the anchoring structure is used for being triggered when the penetrating shell impacts a target rock wall, and is mechanically meshed with rock mass pores and cracks in the rock wall, so that the capsule displacement in the sampling process is prevented. The application solves the technical problems of limited sampling range, low sample fidelity, high operation risk and insufficient recovery reliability in the special lunar environment in the prior art, and improves the sampling capability of steep rock wall and internal rock wall sections.

Inventors

FENG YUJIE
PAN PENGZHI
Mei Wanquan
LIU XUFENG
WANG ZHAOFENG
ZHENG QINGSONG
WANG YAGE

Assignees

中国科学院武汉岩土力学研究所

Dates

Publication Date: 20260512
Application Date: 20260206

Claims (10)

1. An in situ solidification sampling capsule for a wall of a moon lava tube, the sampling capsule comprising: the shell is penetrated, an accommodating space is formed in the shell, one end of the shell is in a warhead-shaped structure, a porous injection area is arranged in the middle of the shell, and the porous injection area is communicated with the external environment and independent of the accommodating space; The mixing driving mechanism is fixedly arranged in the accommodating space and is close to the other end of the penetrating shell; The storage barrels are provided with piston structures, the storage barrels are arranged in parallel along the axis direction of the penetrating shell, one end of one piston structure is embedded at one end port of the corresponding storage barrel and is in sliding sealing fit with the inner cavity of the storage barrel, and the other ends of the piston structures are connected with the driving end of the mixing driving mechanism and are used for driving the piston structures to move in the storage barrel along one end far away from the mixing driving mechanism; a rupturable metal film is hermetically arranged at the other end port of each storage cylinder and is used for sealing the reagent in the storage cylinder to prevent premature leakage or reaction; the inlet end of the static mixing nozzle is fixedly connected with the other ends of the plurality of storage barrels, and the outlet end of the static mixing nozzle is communicated with the porous injection area in a sealing way; And the anchoring structure is arranged at one end of the penetrating shell and is used for being triggered when the penetrating shell impacts a target rock wall, and the anchoring structure is mechanically meshed with rock mass pores and cracks in the rock wall.
2. The in situ solidification sampling capsule for a wall of a lunar lava tube of claim 1, wherein: The multi-hole injection area comprises a diversion cavity, a plurality of diversion holes and one-way check micro valves, wherein the number of the diversion holes is matched with that of the diversion holes, the diversion holes are uniformly arranged in the middle area of the penetration shell along the radial interval and penetrate through the side wall of the penetration shell, the diversion cavity communicated with the diversion holes is arranged in the inner corresponding middle area of the penetration shell, the diversion cavity surrounds the accommodating space and is mutually independent of the accommodating space, the outlet end of the static mixing nozzle is fixedly communicated with the diversion cavity through a sealing pipeline, one-way check micro valve is fixedly arranged at the inner side port of each diversion hole, the conduction direction of each one-way check micro valve is from the diversion cavity to the outer rock wall for preventing substances such as outer rock wall chips and dust from entering the multi-hole injection area, and simultaneously preventing a curing mixture in the diversion cavity from flowing back to the static mixing nozzle or the accommodating space.
3. The in situ solidification sampling capsule for a wall of a lunar lava tube of claim 1 or 2, wherein the hybrid drive mechanism comprises: The control module is fixed in the accommodating space and is arranged close to the other end of the penetrating shell; The fixing part of the shape memory alloy is fixedly arranged in the accommodating space and is distributed close to the control module, and one end of the connecting part of the shape memory alloy, which is far away from the fixing part, is fixedly connected with a locking pin; The push rod is arranged along the axial direction of the penetrating shell, one end, close to the shape memory alloy, of the side wall of the push rod is provided with a limiting hole matched with a locking pin, the locking pin is inserted into the limiting hole in a pluggable manner, the spring is fixedly connected between the fixing part of the shape memory alloy and the push rod, and the spring is in a precompaction state; when the shape memory alloy is heated and contracted after being electrified, the locking pin is driven to be pulled out of the limiting hole, and the spring releases elasticity to drive the push rod to axially move.
4. The in-situ solidification sampling capsule for a wall of a lunar lava tube of claim 3, wherein each piston structure comprises an integrally formed piston body and a connecting rod, the piston body is fixedly arranged at one end of the connecting rod, the piston body is coaxially and slidably matched with the inner side wall of the corresponding storage cylinder and keeps a sealing matched state with the inner side wall of the storage cylinder in the sliding process, and the other end of the connecting rod is fixedly connected with one end of the push rod far away from the spring so as to synchronously drive the piston structure to slide along the axial direction of the storage cylinder through axial movement of the push rod.
5. The in situ solidification sampling capsule for a lunar lava tube wall of claim 4 wherein the anchoring structure comprises: the miniature barbs are uniformly arranged on the outer side wall of one end of the penetrating shell along the circumferential direction, and are made of high-elasticity metal and have outward-opening prestress; And the pressure structure is matched with the number of the micro barbs and is used for pressing the micro barbs against the surface of the penetrating shell, and when the sampling capsule impacts the rock wall, the pressure structure is separated from the micro barbs and the penetrating shell, and the micro barbs are unfolded and embedded into the rock mass pore structure.
6. The in situ solidification sampling capsule for a wall of a lunar lava tube of claim 5, wherein: The quantity of the storage barrels is set to be 3, and the storage barrels are respectively a curing agent storage barrel, a crosslinking agent storage barrel and a catalyst storage barrel, wherein the curing agent storage barrels are used for storing curing agent monomers, the crosslinking agent storage barrels are used for storing anhydrous amine crosslinking agents, and the catalyst storage barrels are used for storing latent catalysts.
7. The in situ solidification sampling capsule for a wall of a lunar lava tube of claim 6, wherein: Each storage cylinder consists of a hollow rigid cylinder body and a protective lining, wherein the protective lining is fixedly arranged on the inner side wall of the rigid cylinder body, and is made of flexible fluoropolymer materials, so that good sealing performance and chemical stability can be kept in vacuum and low-temperature environments.
8. The in situ solidification sampling capsule for a wall of a lunar lava tube of claim 7, wherein: The static mixing nozzle is characterized in that a mixing structure is arranged in the static mixing nozzle and comprises a central shaft and helical blades, the central shaft is fixedly arranged along the axis direction of the static mixing nozzle, the helical blades are sleeved on the central shaft and are in undamped rotary connection with the central shaft, and the mixing structure is used for realizing full mixing of curing agents through fluid shearing and segmentation.
9. The in situ solidification sampling capsule for a wall of a lunar lava tube of claim 1 or 8, wherein: The other end of the penetrating shell is provided with a recovery interface which is fixedly connected with a recovery rope.
10. An in situ solidification sampling system for a wall of a moon lava pipe, the sampling system comprising: The in-situ solidification sampling capsule for the lunar lava pipe rock wall comprises a recovery rope, a lunar rover with an ejection mechanism, wherein the in-situ solidification sampling capsule is used for the lunar lava pipe rock wall according to any one of claims 1-9, one end of the recovery rope is fixedly connected with a recovery interface of the sampling capsule, the other end of the recovery rope is fixedly connected with the ejection mechanism of the lunar rover, and the ejection mechanism is used for ejecting the sampling capsule to a target rock wall at a preset controllable speed and angle.

Description

In-situ solidification sampling capsule and sampling system for wall of lunar lava pipe Technical Field The invention relates to the technical field of deep space exploration and planetary geological sampling, in particular to an in-situ solidification sampling capsule and sampling system for a lunar lava pipe rock wall. Background Lunar lava tubes are considered ideal sites for future lunar base construction because of their ability to provide natural protection against radiation and micro-merle impact. The inner rock wall of a lunar lava pipe usually presents a multilayer structure, comprising loose lunar soil layers, gravel layers and locally compact basalt layers, and the mechanical properties and the structural integrity of the inner rock wall are directly related to the stability of the lava pipe and the safety of the construction of a lunar underground base. The existing moon and celestial body sampling technology relies on mechanical contact operation, drilling or blowing and other modes under ground command, and is directed against the serious challenges in sampling the underground structure of a moon lava pipe, a steep impact pit wall or other low-gravity celestial bodies. Firstly, the sampling of Apollo series, goddess Chang series and other tasks is carried out by contacting a detector with a target surface to sample the surface layer, or by closely operating a mechanical arm, the sampling of areas which cannot be directly contacted, such as steep rock walls, the inside of a lava pipe and the like, is difficult to realize, and the operation is complex and the task cost is high in a high-risk environment. Secondly, most existing sampling schemes are difficult to maintain the original spatial arrangement and particle size distribution information of loose geological media, so that the disintegration, loose substance loss and geological background information damage of a sample in the extraction process are caused, and the integrity and repeatability of scientific analysis are further affected. Finally, conventional sampling is required to obtain samples by mechanical cutting, drilling or pneumatic spraying, and the like, and the recovery stage often requires multiple contact and separation, so that the risk of sample destruction and loss is increased, and the recovery reliability under a long-time and extreme environment is required to be improved. Therefore, how to provide an in-situ solidification sampling capsule for a lunar lava pipe rock wall, which solves the technical problems of limited sampling range, low sample fidelity, high operation risk, insufficient recovery reliability and the like in the prior art, improves the sampling capability of steep rock wall and internal rock wall sections, and is a technical problem to be solved by a person in the art. Disclosure of Invention In view of the above problems, the present invention is directed to providing an in-situ solidification sampling capsule and sampling system for a wall of a lunar lava pipe, which at least solve at least one of the above technical problems. To solve the above technical problem, in a first aspect, the present invention provides an in-situ solidification sampling capsule for a wall of a lunar lava pipe, the sampling capsule comprising: the shell is penetrated, an accommodating space is formed in the shell, one end of the shell is in a warhead-shaped structure, a porous injection area is arranged in the middle of the shell, and the porous injection area is communicated with the external environment and independent of the accommodating space; The mixing driving mechanism is fixedly arranged in the accommodating space and is close to the other end of the penetrating shell; The storage barrels are provided with piston structures, the storage barrels are arranged in parallel along the axis direction of the penetrating shell, one end of one piston structure is embedded at one end port of the corresponding storage barrel and is in sliding sealing fit with the inner cavity of the storage barrel, and the other ends of the piston structures are connected with the driving end of the mixing driving mechanism and are used for driving the piston structures to move in the storage barrel along one end far away from the mixing driving mechanism; a rupturable metal film is hermetically arranged at the other end port of each storage cylinder and is used for sealing the reagent in the storage cylinder to prevent premature leakage or reaction; the inlet end of the static mixing nozzle is fixedly connected with the other ends of the plurality of storage barrels, and the outlet end of the static mixing nozzle is communicated with the porous injection area in a sealing way; And the anchoring structure is arranged at one end of the penetrating shell and is used for being triggered when the penetrating shell impacts a target rock wall, and the anchoring structure is mechanically meshed with rock mass pores and cracks in the rock wall. The porou