Microbial pollution protection device of planetary detection sampler

Abstract

A microbial contamination protection device of a planetary detection sampler comprises a bottom frame, an opening and closing device, a locking device and a protective film, the opening and closing device comprises an opening and closing frame, linkage connecting rods, transverse connecting rods and a transmission rotating shaft, the transmission rotating shaft is rotationally connected to the bottom frame, and the same ends of the two linkage connecting rods in each set are connected through the transverse connecting rods; the transmission rotating shaft penetrates through the linkage connecting rods and is fixedly connected with the opening and closing frame. One end of the protective film is connected to one side of the bottom frame, the other end of the protective film is connected with the opening and closing frame, and the protective film is connected with the transverse connecting rods and the linkage connecting rods. An air inlet and a sealed aviation plug interface are formed in one side of the bottom frame, and the sealed aviation plug interface is used for being electrically connected with a sampler mounted on the bottom frame; a pressing lock catch is arranged between the bottom frame and the opening and closing frame, and an axial sealing lock catch is arranged between the opening and closing frame and the transmission rotating shaft, so that the bottom frame and the opening and closing frame are locked, and the opening and closing frame and the transmission rotating shaft are sealed. Microbial contamination of the detector can be protected in operations such as ground testing.

Description

Technical Field

[0001] The invention relates to a microbial contamination protection device for a planetary exploration sampler, belonging to the technical field of aerospace. Background Art

[0002] As human beings continue to explore outer space, the importance of planetary exploration missions has become increasingly prominent. However, with the advancement of space exploration, humans are also facing the great responsibility of protecting and maintaining the outer space environment. Especially in the exploration of planets such as Mars, it is particularly important to protect the ecological environment of the target planet and ensure the effectiveness of the scientific experiments of the probe.

[0003] In planetary exploration missions, key products (samplers) of sampling functions such as sampling robotic arms are widely used to collect samples such as soil and rocks for analysis and research by scientists on Earth. However, these samplers are easily contaminated by various microorganisms present on Earth during the final assembly and integration testing process on Earth. If these samplers are not effectively protected before being transported to the explored planet, they may bring in microorganisms on Earth, thereby contaminating the ecological environment of the target planet and may affect the accuracy and reliability of the collected samples. Summary of the invention

[0004] The technical problem solved by the present application is: to overcome the deficiencies of the prior art and to provide a microbial contamination protection device for a planetary exploration sampler, which is used to protect against microbial contamination in planetary exploration.

[0005] The present invention provides a microbial contamination protection device for a planetary exploration sampler, which uses high temperature resistant materials and has the functions of automatic opening, closing and sealing and locking. Installing this protection device on a planetary exploration machine can effectively isolate the contamination of the robot arm on Earth from the external environment, preventing it from contaminating the ecological environment of Mars and affecting the results of scientific experiments.

[0006] The planetary protection device of the present invention is not only a technological innovation, but also a contribution to the protection of the outer space environment. It provides important technical support for the successful implementation of human deep space exploration missions and is expected to promote more significant achievements in human exploration of outer space.

[0007] The technical solutions provided by this application are as follows:

[0008] A microbial contamination protection device for a planetary exploration sampler comprises a bottom frame, an opening and closing device, a locking device and a protective film, wherein the bottom frame is mounted on a detector substrate; the opening and closing device comprises an opening and closing frame, a linkage connecting rod, a transverse connecting rod and a transmission shaft, wherein the transmission shaft is rotatably connected to the bottom frame, two linkage connecting rods form a group, and the same end of two linkage connecting rods in each group is connected through a transverse connecting rod, and the transmission shaft passes through a plurality of linkage connecting rods and is fixedly connected to the opening and closing frame; one end of the protective film is connected to one side of the bottom frame, and the other end is connected to the opening and closing frame, and the middle part of the protective film is sequentially connected to a plurality of transverse connecting rods and the linkage connecting rod; A clean gas inlet and a sealed aviation plug interface are provided on one side of the bottom frame. A one-way valve is provided at the clean gas inlet, and the sealed aviation plug interface is used for electrical connection with the sampler installed on the bottom frame. A plurality of sets of compression locks are provided between the bottom frame and the opening and closing frame to lock the bottom frame and the opening and closing frame through the compression locks when the opening and closing frame is in a closed state. An axial sealing lock is provided between the opening and closing frame and the transmission shaft to seal the gap between the opening and closing frame and the transmission shaft. The locking device is connected to the compression lock and the axial sealing lock to control the locking and opening of the compression lock and the axial sealing lock.

[0009] Any two adjacent linkage links or the opening and closing frame and the adjacent linkage links are linked by traction teeth and traction grooves; the two adjacent linkage links or the adjacent opening and closing frame and the linkage links are rod A and rod B respectively, and a traction groove is provided on the side of rod A facing rod B, and the traction groove includes an annular groove coaxial with the hole through which the transmission shaft passes and an arc groove located at the edge of the annular groove; a traction tooth is provided on the side of rod B facing rod A, and the traction tooth includes an annular portion and a protrusion connected to the outer side of the annular portion, the annular portion cooperates with the annular groove, the protrusion is located in the arc groove, and the width of the arc groove along the circumferential direction of the annular groove is greater than the width of the protrusion.

[0010] The contact surface between the opening and closing frame and the bottom frame is provided with a sealing rubber ring, and the matching surface between the bottom frame and the opening and closing frame is arranged with a sealing rubber pad, the surface of the sealing rubber pad has a groove, and the shape and size of the groove correspond to the sealing rubber ring.

[0011] The locking device drives the lower lock buckle to move to realize locking and opening with the upper lock buckle.

[0012] The clamping lock also includes a sliding shaft, a limiting spring and a limiting boss. Both ends of the sliding shaft are fixedly connected in the sliding groove. The sliding shaft passes through the end of the lower lock buckle located in the sliding groove and is slidably connected to the lower lock buckle. The limiting spring is sleeved on the outside of the sliding shaft and is located on the side of the lower lock buckle facing the upper lock buckle. When the lower lock buckle moves, the direction in which the limiting spring is gradually compressed is the locking direction; the limiting boss is fixedly connected to the clamping lock buckle base. When the opening and closing frame contacts the bottom frame and is closed, the limiting boss is located on the side of the upper lock buckle away from the lower lock buckle.

[0013] The axial sealing lock comprises an axial locking base, an axial locking slider and an axial sealing end cover, wherein the axial locking base is fixedly connected to the bottom frame, a groove is provided on the side of the axial locking base away from the bottom frame, one end of the axial locking slider is located in the groove and is slidably connected to the axial locking base along the length direction of the groove; the transmission shaft is rotatably connected to the axial locking base, one end of the transmission shaft passes through a plurality of linkage connecting rods and an opening and closing frame and is fixedly connected to the axial sealing end cover, and a large diameter end is provided at the other end as a driven end, a step surface is formed between the large diameter end and the transmission shaft, and an arc-shaped transition is formed between the edge of the step surface and the outer peripheral surface of the large diameter end;

[0014] The direction in which the axial locking slider gradually approaches the axis of the transmission shaft is the locking direction, and the locking device drives the axial locking slider to move toward or away from the axis of the transmission shaft.

[0015] The axial sealing lock buckle also includes an axial sealing rubber, which is arranged on the side of the axial sealing end cover facing the opening and closing frame. The axial sealing rubber is a plurality of closed rings that are sleeved in sequence, and the end of the transmission shaft is located inside the smallest closed ring.

[0016] The locking device includes a wire rope, a pulley, a locker and a relaxer. The locker is fixedly connected to one end of the bottom frame and is located on the side of the transmission shaft away from the compression lock buckle. The relaxer is fixedly connected to the other end of the bottom frame and is located on the side of the transmission shaft away from the compression lock buckle. The pulley is rotatably connected to the bottom frame and is in contact with the bottom frame when the opening and closing frame is in a closed state. One end of the wire rope is connected to the locker, the middle part of the wire rope bypasses the pulley and is connected in series with the compression lock buckle and the axial sealing lock buckle, and the other end of the wire rope is connected to the relaxer; the locker is used to drive the wire rope to wind in one direction, so that the compression lock buckle and the axial sealing lock buckle driven by the wire rope are locked; the relaxer is used to drive the wire rope to wind in the opposite direction, so that the compression lock buckle and the axial sealing lock buckle driven by the wire rope are opened.

[0017] The lock comprises a locking drive motor, a ratchet lock, a locking device winding wheel and an electric telescopic rod. The locking drive motor is fixedly connected to the bottom frame and is located on the side of the transmission shaft away from the compression lock buckle. The output shaft of the locking drive motor is connected to the locking device winding wheel, the wire rope is fixed to the locking device winding wheel, the ratchet lock comprises a ratchet, the ratchet is coaxially fixed outside the rotating shaft of the locking device winding wheel, the electric telescopic rod is fixedly connected to the bottom frame, the electric telescopic rod cooperates with the ratchet, the electric telescopic rod is extended, the ratchet is locked, and the locking device winding wheel can only rotate in the winding direction. At this time, the compression lock buckle and the axial sealing lock buckle are locked, the electric telescopic rod is retracted, the ratchet is released, and the locking device winding wheel can rotate in the opposite direction of the winding direction.

[0018] The relaxer comprises a relaxer drive motor and a relaxer winding wheel. The relaxer drive motor is fixedly connected to the bottom frame, the output shaft of the relaxer drive motor is connected to the relaxer winding wheel, and one end of the wire rope is fixedly connected to the relaxer winding wheel.

[0019] In summary, this application at least includes the following beneficial technical effects:

[0020] a. By using this device, a closed protective cavity that fits the space can be customized according to the shape of the sampler, which is convenient for installation on the outer surface of the spacecraft without affecting the normal operation of other equipment;

[0021] b. The device has good air tightness and can monitor air pressure, which can achieve long-term positive pressure in the cavity to ensure that external microorganisms do not enter, thereby reducing microbial contamination;

[0022] c. The device uses a transparent protective film made of high temperature resistant material to achieve visibility of the sampler during protection, and can perform sterilization operations such as ultraviolet and high temperature gas in a closed state;

[0023] d. The device is provided with internal and external electrical connectors to realize electrical testing of the sampler when the device is closed;

[0024] eThe device has an electronically controlled opening and closing function. When the sampler needs to be tested or operated, program drive is implemented to facilitate the operation of the sampler. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the microbial contamination protection device for planetary exploration samplers;

[0026] Figure 2 This is a schematic diagram of the bottom frame installation;

[0027] Figure 3 It is a schematic diagram of the rear end surface of the bottom frame;

[0028] Figure 4 is a schematic diagram of the opening and closing device;

[0029] Figure 5 Schematic diagram of traction teeth / grooves, wherein the left figure is a schematic diagram of the traction groove, and the right figure is a schematic diagram of the traction teeth;

[0030] Figure 6 It is a schematic diagram of linkage principle;

[0031] Figure 7 It is a schematic diagram of the open and closed end face seal;

[0032] Figure 8 This is a schematic diagram of the protective cover device in the open state;

[0033] Fig. 9 is a schematic diagram of a locking device;

[0034] Fig.10 is a schematic diagram of a locking device;

[0035] Fig.11 It is a schematic diagram of pressing the lock;

[0036] Fig.12 This is a schematic diagram of the installation of the compression lock;

[0037] Fig.13 Schematic diagram of the axial sealing lock, wherein the right figure is a schematic diagram of the structure of the axial sealing lock, and the left figure is a cross-sectional view of the right figure through the axis of the transmission shaft;

[0038] Fig.14 The diagram is a schematic diagram of the axial locking principle, where the left diagram is a schematic diagram of the locked state, and the right diagram is a schematic diagram of the open state;

[0039] Fig.15 Schematic diagram of the transmission shaft, wherein the left figure is a schematic diagram of the three-dimensional structure of the transmission shaft, and the right figure is a front view of the left figure;

[0040] Fig.16 This is a schematic diagram of a relaxer;

[0041] Fig.17 This is a schematic diagram of the device usage environment. DETAILED DESCRIPTION

[0042] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments disclosed in the present invention will be further described in detail below with reference to the accompanying drawings.

[0043] The present application embodiment discloses a microbial contamination protection device for a planetary exploration sampler, such as Figure 1 As shown, it includes: a bottom frame 1, an opening and closing device 2, a locking device 3, and a protective film 4.

[0044] like Figure 2As shown, the bottom frame 1 is installed on the detector substrate 5, and a sealing rubber pad 15 is arranged at the bottom of the bottom frame 1 to seal between the bottom frame 1 and the detector substrate 5 so as to seal the bottom frame 1. The rear end plate of the bottom frame 1 is provided with a clean gas inlet 11, a sealed aviation plug interface 12 and a barometer 13, as shown in FIG. Figure 3 A one-way valve is provided at the air inlet 11, so that gas can only enter but not exit; a sealed aviation plug interface 12 is used for electrical connection; and a barometer 13 is connected to the inside to monitor the air pressure inside the protective cover.

[0045] When the sampler needs to be tested or other actions are performed on the ground, the sampler is fixed on the bottom frame 1, and the sampler is connected to the sealed aviation plug interface 12. A closed space is formed with the bottom frame 1 through the opening and closing device 2 and the protective film 4. The sampler is located in the closed space. At this time, the sampler can be controlled through the sealed aviation plug interface 12 to complete ground testing and other actions, thereby avoiding the sampler being contaminated by microorganisms during ground work.

[0046] like Figure 4 As shown, the opening and closing device 2 includes: a driving device 21, an opening and closing frame 22, a linkage connecting rod 23, a transverse connecting rod 24, and a transmission shaft 25. The driving device 21 is a motor, and the driving device 21 is fixedly connected to the bottom frame 1 through a flange. The output shaft of the driving device 21 is connected to the opening and closing frame 22 through the driving transmission shaft 25, and the rotation of the driving device 21 is converted into the rotation of the opening and closing frame 22. A plurality of linkage connecting rods 23 are installed on the transmission shaft 25. In this embodiment, the linkage connecting rods include linkage connecting rods 231-235, and the linkage is realized by the traction teeth and traction grooves between the linkage connecting rods, as shown in FIG. Figure 5 The left and right pictures and Figure 6 As shown. The linkage link is connected to the opening and closing frame 22 through a traction tooth / groove combination. After the opening and closing frame 22 rotates, the linkage links 231-235 are driven to rotate in sequence through the traction teeth / groove. The driving device 21 and the linkage links 231-235 are symmetrically installed on both sides of the device of the present invention, and the symmetrical linkage links 231-235 are connected by a transverse link 24. The end face of the opening and closing frame 22 is provided with a sealing rubber ring. In the present embodiment, two groups of sealing rubber rings are provided, namely a first sealing rubber ring 221 and a second sealing rubber ring 222 which are parallel to each other. The first sealing rubber ring 221 is located on the side of the second sealing rubber ring 222 facing the sealing cavity. The cross-sections of the first sealing rubber ring 221 and the second sealing rubber ring 222 are semicircular, and the cross-sectional diameter of the first sealing rubber ring 221 is larger than that of the second sealing rubber ring 222. A sealing rubber pad 14 is arranged on the upper end face of the opening and closing of the bottom frame 1, and the sealing rubber pad 14 has a groove, and the shape and size correspond to the two groups of the first sealing rubber ring 221 and the second sealing rubber ring 222, as shown Figure 7 As shown, the sealing effect is ensured by the above-mentioned double-pass sealing.

[0047] like Figure 2 and Figure 8 As shown, the protective film 4 is pasted and fixed to the bottom frame 1, the opening and closing frame 22, the linkage rods 231-235 and the inner side of the transverse link 24. When the opening and closing frame 22 moves toward the bottom frame 1, the protective film 4 is pulled by the link to gradually form a closed protective cavity (i.e. Figure 2 When the opening and closing frame 22 gradually moves in the opposite direction of the bottom frame 1, the protective film 4 is gradually folded by the pulling of the connecting rod, and the protective cover device opens.

[0048] A plurality of sets of compression lock buckles 35 are arranged between the bottom frame 1 and the opening and closing frame 22, so as to lock the bottom frame 1 and the opening and closing frame 22 by means of the compression lock buckles 35 when the opening and closing frame 22 is in a closed state, and an axial sealing lock buckle 33 is arranged between the opening and closing frame 22 and the linkage connecting rod and the transmission shaft 25. The compression lock buckle 35 and the axial sealing lock buckle 33 are provided with a locking device 3, and the locking device 3 is used to control the compression lock buckle 35 and the axial sealing lock buckle 33 to be automatically locked.

[0049] like Fig. 9 As shown, the locking device 3 is located at the front end face of the bottom frame 1, and the locking device 3 includes a steel wire rope 36, multiple groups of pulleys 34, a group of lockers 32 and a group of relaxers 31. The pulley 34 is rotatably connected to the bottom frame 1 and is located on the side that contacts the bottom frame 1 when the opening and closing frame 22 is closed. The locker 32 and the relaxer 31 are installed on the bottom frame 1. One end of the steel wire rope 36 is connected to the locker 32, and the other end is connected to the relaxer 31. The steel wire rope 36 is connected in series with multiple groups of compression lock buckles 35 and two groups of axial sealing lock buckles 33 connected to the bottom frame 1. At the same time, the steel wire rope passes around the outer sides of multiple groups of pulleys 34, and the pulleys 34 play a transmission and guiding role for the steel wire rope.

[0050] like Fig.10As shown, the locker 32 includes: a locking drive motor 321, a coupling locker 322, a ratchet locker 323, a locker winding wheel 324, a locker fixing bracket 325 and an electric telescopic rod 326. The locking drive motor 321 is fixedly connected to the bottom frame 1 through a flange plate and is located on the side of the driving device 21 away from the pressing lock 35. The output shaft of the locking drive motor 321 is connected to the locking winding wheel 324 through the locking coupling 322. The locking winding wheel 324 passes through the ratchet locker 323. The ratchet locker 323 includes a ratchet, a locking switch and a housing. The ratchet is fixed on the shaft of the locking winding wheel 324. The wire rope 36 is fixed to the locking device winding wheel 324. When the locking drive motor 321 rotates, it drives the locking device winding wheel 324 to wind the wire rope 36 around the locking device winding wheel 324, so as to pull the parts connected in series on the wire rope 36 to move in the locking direction. The locking device fixing bracket 325 is fixedly connected to the bottom frame 1. The housing of the ratchet locker 323 is fixed to the locking device fixing bracket 325. The locking switch of the ratchet locker 323 is connected to the electric telescopic rod 326. The electric telescopic rod 326 extends to drive the ratchet locker 323 switch, the ratchet locker 323 is locked, and the locking device winding wheel 324 rotates in the winding direction; the telescopic rod 326 retracts to drive the ratchet locker 323 switch in the reverse direction, the ratchet locker 323 is released, and the locking device winding wheel 324 can rotate in the reverse direction of the winding direction.

[0051] like Fig.11 and Fig.12As shown, the pressing lock 35 includes: a pressing lock base 351, a sliding shaft 352, a lower lock 353, a limiting spring 354, an upper lock 355, and a limiting boss 356. The pressing lock base 351 is installed on the bottom frame 1, and the upper lock 355 is installed on the opening and closing frame 22. The pressing lock base 351 is provided with a slide groove, and both ends of the sliding shaft 352 are fixedly connected in the slide groove. One end of the lower lock 353 is located in the slide groove, and the sliding shaft 352 passes through the end of the lower lock 353 located in the slide groove and is slidably connected to the lower lock 353. The limiting spring 354 is sleeved on the outer side of the sliding shaft 352 and is located on the side of the lower lock 353 facing the upper lock 355. When the lower lock 353 moves, the direction in which the limiting spring 354 is gradually compressed is the locking direction; the limiting boss 356 It is fixedly connected to the clamping lock base 351. When the opening and closing frame 22 contacts the bottom frame and is closed, the limiting boss 356 is located on the side of the upper lock buckle 355 away from the lower lock buckle 353. The limiting boss 356 is used to limit the upper lock buckle 355; the upper lock buckle 355 is laterally bent toward one end of the bottom frame 1 to form an upper locking portion, and the end of the upper locking portion is an arc shape. The lower lock buckle 353 is bent toward one end of the opening and closing frame 22 in a direction opposite to the upper locking portion to form a lower locking portion. When the opening and closing frame 22 contacts the bottom frame and is closed, the lower locking portion is located above the upper locking portion; the lower lock buckle 353 is fixed to the wire rope 36. When working, the locker 32 pulls the wire rope 36 to move in the locking direction, and the wire rope 36 drives the lower lock buckle 353 to move in the locking direction. The lower lock buckle 353 cooperates with the upper lock buckle 355 through the arc-shaped contact surface between them. When the lower lock buckle 353 moves in the locking direction, the upper lock buckle 355 is pressed downward through the cooperation of the arc-shaped contact surface. The movement of the upper lock buckle 355 drives the opening and closing frame 22 fixed thereto to be pressed downward, thereby realizing the clamping action of the opening and closing frame 22.

[0052] like Fig.13 As shown in the left and right figures, the axial sealing lock 33 includes: an axial lock base 331, an axial lock base cover 332, an axial lock slider 333, a transmission shaft 25, an axial sealing rubber 334, and an axial sealing end cover 335. The axial lock base 331 is fixedly connected to the bottom frame 1, and a groove is provided on the side of the axial lock base 331 away from the bottom frame 1. One end of the axial lock slider 333 is located in the groove and is slidably connected to the axial lock base 331 along the groove. The axial lock base cover 332 is installed on the outer side of the axial lock base 331 away from the bottom frame 1, and the other end of the axial lock slider 333 passes through the axial lock base cover 332. The transmission shaft 25 is rotatably connected to the axial lock base 331. A large diameter end is provided at the end of the transmission shaft 25 connected to the drive device 21, and a step surface is formed between the large diameter end and the transmission shaft 25. There is an arc-shaped transition between the edge of the step surface and the outer peripheral surface of the large diameter end, as shown in FIG. Fig.15As shown in the left and right figures; the end of the transmission shaft 25 away from the driving device 21 passes through a plurality of linkage connecting rods and the opening and closing frame 22 in sequence, and the end of the transmission shaft 25 passing through the opening and closing frame 22 is fixed to the axial sealing end cover 335. The axial sealing end cover 335 is arranged with an axial sealing rubber 334 on the side facing the opening and closing frame 22. The axial sealing rubber 334 is a plurality of closed circles that are sleeved in sequence, and the end of the transmission shaft 25 is located inside the smallest closed circle. In this embodiment, the axial sealing rubber 334 is two closed rectangular circles that are sleeved in sequence. The axial locking slider 333 is located on the side of the step surface facing the linkage connecting rod. There is a chamfer between the end of the axial locking slider 333 and the surface close to the step surface. The direction in which the axial locking slider 333 gradually approaches the axis of the transmission shaft 25 is the locking direction. The axial locking slider 333 is fixed to the wire rope 36. When locking, the locker 32 pulls the wire rope 36 to move in the locking direction, and the axial locking slider 333 moves under the drive of the wire rope 36, as shown in FIG. Fig.14 As shown in the left and right figures, the axial locking slider 333 drives the transmission shaft 25 and the axial sealing end cover 335 to move by cooperating with the arc surface of the transmission shaft 25, and the axial sealing rubber 334 on the axial sealing end cover 335 is squeezed and deformed by the axial sealing end cover 335 and the end faces of the opening and closing frame 22 and the bottom frame 1, thereby pressing and sealing the space between the transmission shaft 25 and the opening and closing frame 22.

[0053] like Fig.16 As shown, the relaxer 31 includes: a relaxer drive motor 311, a relaxer coupling 312, a relaxer fixing bracket 313, and a relaxer winding wheel 314. Fig.16 As shown. The relaxer fixing bracket 313 is fixedly connected to the bottom frame 1, the relaxer driving motor 311 is fixedly connected to the bottom frame 1 through a flange, the output shaft of the relaxer driving motor 311 is connected to the relaxer winding wheel 314 through the relaxer coupling 312, and one end of the wire rope 36 is fixedly connected to the relaxer winding wheel 314. During operation, when the locking device ratchet locking switch is closed, the relaxer driving motor 311 drives the relaxer winding wheel 314 to rotate, and the relaxer winding wheel 314 fixes the wire rope 36, so that the wire rope 36 moves in the opposite direction of the locking direction (i.e., the opening direction).

[0054] The specific working process is:

[0055] The sampler is installed on the end surface of the detector. After the microorganisms are cleaned, the protective cover is installed on the end surface of the detector to cover the sampler. Fig.17 shown.

[0056] The steps to close and lock the protective cover are as follows:

[0057] Step 1: The color opening and closing drive devices on both sides of the protective cover rotate in the closing direction, and the opening and closing frame is driven to rotate in the closing direction through the transmission shaft until the protective cover is fully opened. During the process, the linkage rod and the protective film follow the movement;

[0058] Step 2: After fully closed, the driving motor of the lock rotates to drive the winding wheel to rotate, and the rotation of the winding wheel pulls the wire rope toward the locker. The wire rope pulls the lower lock buckle of the compression lock buckle and the axial lock buckle slider of the axial sealing lock buckle to move in the locking direction until the lower lock buckle completely locks the upper lock buckle and the axial lock buckle slider completely locks the transmission shaft, and the locking is completed.

[0059] Before testing the equipment, the equipment is in storage state. It is necessary to observe the air pressure gauge of the protective cover to ensure that the inside of the protective cover always maintains a positive pressure relative to the outside world. If the air pressure inside the protective cover decreases, clean gas is added through the air inlet.

[0060] When testing the equipment, you need to open the protective cover. Opening the protective cover is divided into the following steps:

[0061] Step 1: The electric telescopic rod of the locker works, releasing the ratchet locker switch;

[0062] Step 2: The relaxer relaxation drive motor rotates, driving the relaxer winding wheel to rotate. The rotation of the winding wheel pulls the wire rope toward the relaxer. The wire rope pulls the lower lock buckle of the compression lock buckle and the axial lock buckle slider of the axial sealing lock buckle to move in the unlocking direction until the lower lock buckle is completely away from the upper lock buckle and the axial lock buckle slider is completely away from the transmission shaft, and the unlocking is completed.

[0063] Step 3: After unlocking, the color opening and closing drive devices on both sides of the protective cover rotate in the opening direction, and the opening and closing frame rotates through the transmission shaft until the protective cover is fully opened. During the process, the linkage rod and the protective film follow the movement.

[0064] The contents not described in detail in this application specification belong to the common knowledge of those skilled in the art.

[0065] The present application is described in detail above in conjunction with specific implementation methods and exemplary examples, but these descriptions cannot be understood as limiting the present application. Those skilled in the art understand that, without departing from the spirit and scope of the present application, a variety of equivalent replacements, modifications or improvements can be made to the technical solution of the present application and its implementation methods, all of which fall within the scope of the present application. The scope of protection of the present application shall be subject to the attached claims.

Claims

1. A microbial contamination protection device for a planetary exploration sampler, characterized in that: It comprises a bottom frame (1), an opening and closing device (2), a locking device (3) and a protective film (4), wherein the bottom frame (1) is mounted on a detector substrate (5); The opening and closing device (2) comprises an opening and closing frame (22), a linkage connecting rod (23), a transverse connecting rod (24) and a transmission rotating shaft (25); the transmission rotating shaft (25) is rotatably connected to the bottom frame (1); two linkage connecting rods (23) form a group; the same end of the two linkage connecting rods (23) in each group is connected by a transverse connecting rod (24); the transmission rotating shaft (25) passes through a plurality of linkage connecting rods (23) and is fixedly connected to the opening and closing frame (22); One end of the protective film (4) is connected to one side of the bottom frame (1), and the other end is connected to the opening and closing frame (22); the middle part of the protective film (4) is connected to a plurality of transverse connecting rods (24) and linkage connecting rods (23) in sequence; A sealed aviation plug interface (12) and an air inlet (11) for introducing clean gas are provided on one side of the bottom frame (1), and the sealed aviation plug interface (12) is used to be electrically connected to a sampler installed on the bottom frame (1); A plurality of groups of pressing lock buckles (35) are arranged between the bottom frame (1) and the opening and closing frame (22), so that the bottom frame (1) and the opening and closing frame (22) are locked by the pressing lock buckles (35) when the opening and closing frame (22) is in a closed state; an axial sealing lock buckle (33) is arranged between the opening and closing frame (22) and the transmission shaft (25), so as to seal the gap between the opening and closing frame (22) and the transmission shaft (25); and a locking device (3) is connected to the pressing lock buckle (35) and the axial sealing lock buckle (33), so as to control the locking and opening of the pressing lock buckle (35) and the axial sealing lock buckle (33).

2. The microbial contamination protection device for a planetary exploration sampler according to claim 1, characterized in that: Any two adjacent linkage links (23) or the opening and closing frame (22) and the adjacent linkage links (23) are linked by traction teeth and traction grooves; the two adjacent linkage links (23) or the adjacent opening and closing frame (22) and the linkage links (23) are rod A and rod B respectively; rod A is provided with a traction groove on the side facing rod B, the traction groove comprises an annular groove coaxial with the hole through which the transmission shaft (25) passes and an arc groove located at the edge of the annular groove; rod B is provided with a traction tooth on the side facing rod A, the traction tooth comprises an annular portion and a protrusion connected to the outer side of the annular portion, the annular portion cooperates with the annular groove, the protrusion is located in the arc groove, and the width of the arc groove along the circumferential direction of the annular groove is greater than the width of the protrusion.

3. The microbial contamination protection device for a planetary exploration sampler according to claim 1, characterized in that: The surface of the opening and closing frame (22) in contact with the bottom frame (1) is provided with a sealing rubber ring, and the surface of the bottom frame (1) matching with the opening and closing frame (22) is arranged with a sealing rubber pad (14), and the surface of the sealing rubber pad (14) has a groove, and the shape and size of the groove correspond to the sealing rubber ring.

4. The microbial contamination protection device for a planetary exploration sampler according to claim 3, characterized in that: The clamping lock buckle (35) comprises a clamping lock buckle base (351), a lower lock buckle (353) and an upper lock buckle (355). The clamping lock buckle base (351) is installed on the bottom frame (1), and the upper lock buckle (355) is installed on the opening and closing frame (22). The clamping lock buckle base (351) is provided with a slide groove. One end of the lower lock buckle (353) is located in the slide groove and is slidably connected to the clamping lock buckle base (351) along the direction of the slide groove. The other end of the lower lock buckle (353) is bent transversely to form a lower locking portion. One end of the upper lock buckle (355) facing the bottom frame (1) is bent in a direction opposite to the lower locking portion to form an upper locking portion. When the opening and closing frame (22) contacts the bottom frame and is closed, the lower locking portion is located above the upper locking portion. The ends of the upper locking portion and the lower locking portion that cooperate are arc-shaped, so that when the lower locking buckle (353) moves in the locking direction, the upper locking buckle (355) is pressed downward through the arc-shaped contact surface, and the movement of the upper locking buckle (355) drives the opening and closing frame (22) fixed thereto to be pressed downward, thereby realizing the pressing action of the opening and closing frame (22); The locking device (3) drives the lower lock buckle (353) to move so as to achieve locking and unlocking with the upper lock buckle (355).

5. The microbial contamination protection device for a planetary exploration sampler according to claim 3, characterized in that: The clamping lock (35) further comprises a sliding shaft (352), a limiting spring (354) and a limiting boss (356). Both ends of the sliding shaft (352) are fixedly connected in the slide groove. The sliding shaft (352) passes through the end of the lower lock buckle (353) located in the slide groove and is slidably connected to the lower lock buckle (353). The limiting spring (354) is sleeved on the outer side of the sliding shaft (352) and is located on the side of the lower lock buckle (353) facing the upper lock buckle (355). When the lower lock buckle (353) moves, the direction in which the limiting spring (354) is gradually compressed is the locking direction. The limiting boss (356) is fixedly connected to the clamping lock base (351). When the opening and closing frame (22) contacts the bottom frame and is closed, the limiting boss (356) is located on the side of the upper lock buckle (355) away from the lower lock buckle (353).

6. The microbial contamination protection device for a planetary exploration sampler according to claim 1, characterized in that: The axial sealing lock (33) comprises an axial locking base (331), an axial locking slider (333) and an axial sealing end cover (335); the axial locking base (331) is fixedly connected to the bottom frame (1); a groove is provided on the side of the axial locking base (331) facing away from the bottom frame (1); one end of the axial locking slider (333) is located in the groove and is slidably connected to the axial locking base (331) along the length direction of the groove; the transmission shaft (25) is rotatably connected to the axial locking base (331); one end of the transmission shaft (25) passes through a plurality of linkage connecting rods (23) and an opening and closing frame (22) and is fixedly connected to the axial sealing end cover (335); the other end is provided with a large diameter end as a driven end; a step surface is formed between the large diameter end and the transmission shaft (25); and a circular arc transition is formed between the edge of the step surface and the outer peripheral surface of the large diameter end; The direction in which the axial locking slider (333) gradually approaches the axis of the transmission shaft (25) is the locking direction, and the locking device (3) drives the axial locking slider (333) to move toward or away from the axis of the transmission shaft (25).

7. The microbial contamination protection device for a planetary exploration sampler according to claim 6, characterized in that: The axial sealing lock buckle (33) further comprises an axial sealing rubber (334), which is arranged on the side of the axial sealing end cover (335) facing the opening and closing frame (22), and the axial sealing rubber (334) is a plurality of closed rings which are sleeved in sequence, and the end of the transmission shaft (25) is located inside the smallest closed ring.

8. The microbial contamination protection device for a planetary exploration sampler according to claim 1, characterized in that: The locking device (3) comprises a steel wire rope (36), a pulley (34), a locker (32) and a relaxer (31); the locker (32) is fixedly connected to one end of the bottom frame (1) and is located on a side of the transmission shaft (25) away from the pressing lock buckle (35); the relaxer (31) is fixedly connected to the other end of the bottom frame (1) and is located on a side of the transmission shaft (25) away from the pressing lock buckle (35); the pulley (34) is rotatably connected to the bottom frame (1) and is in contact with the bottom frame (1) when the opening and closing frame (22) is in a closed state; one end of the steel wire rope (36) is connected to the locker (32), the middle part of the wire rope (36) passes over the pulley (34) and is connected in series with the compression lock buckle (35) and the axial sealing lock buckle (33), and the other end of the wire rope (36) is connected to the relaxer (31); the locker (32) is used to drive the wire rope (36) to wind in one direction, so that the wire rope (36) drives the connected compression lock buckle (35) and the axial sealing lock buckle (33) to be locked; the relaxer (31) is used to drive the wire rope (36) to wind in the opposite direction, so that the wire rope (36) drives the connected compression lock buckle (35) and the axial sealing lock buckle (33) to open.

9. The microbial contamination protection device for a planetary exploration sampler according to claim 8, characterized in that: The locking device (32) comprises a locking drive motor (321), a ratchet locking device (323), a locking device winding wheel (324) and an electric telescopic rod (326); the locking drive motor (321) is fixedly connected to the bottom frame (1) and is located on a side of the transmission shaft (25) away from the pressing lock buckle (35); the output shaft of the locking drive motor (321) is connected to the locking device winding wheel (324); the steel wire rope (36) is fixed to the locking device winding wheel (324); the ratchet locking device (323) comprises a ratchet The ratchet is coaxially fixed to the outside of the rotating shaft of the locking device winding wheel (324), the electric telescopic rod (326) is fixedly connected to the bottom frame (1), the electric telescopic rod (326) cooperates with the ratchet, the electric telescopic rod (326) is extended, the ratchet is locked, and the locking device winding wheel (324) can only rotate in the winding direction. At this time, the clamping lock (35) and the axial sealing lock (33) are locked, the electric telescopic rod (326) is retracted, the ratchet is released, and the locking device winding wheel (324) can rotate in the opposite direction of the winding direction.

10. The microbial contamination protection device for a planetary exploration sampler according to claim 8, characterized in that: The relaxer (31) comprises a relaxer drive motor (311) and a relaxer winding wheel (314); the relaxer drive motor (311) is fixedly connected to the bottom frame (1); the output shaft of the relaxer drive motor (311) is connected to the relaxer winding wheel (314); and one end of the steel wire rope (36) is fixedly connected to the relaxer winding wheel (314).

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