Multi-stage sealing device for moon-based vacuum degree preservation

Abstract

The utility model relates to a lunar-based vacuum degree keeping multistage sealing device which comprises a sealing cabin, the sealing cabin comprises an outer cylinder and a sealing plug, one end of the outer cylinder is a closed end, and the other end of the outer cylinder is an open end; the sealing plug is matched with the opening end of the outer cylinder and is used for operably sealing the opening of the outer cylinder; one of the outer cylinder and the sealing plug is provided with an O-shaped sealing ring, and the other one of the outer cylinder and the sealing plug is provided with a sealing surface matched with the O-shaped sealing ring; one of the outer cylinder and the sealing plug is provided with an axial annular cutting edge, and the other one of the outer cylinder and the sealing plug is provided with an annular soft metal sealing strip matched with the annular cutting edge; when the sealing plug is installed in place, first sealing between the sealing plug and the outer cylinder is achieved through the O-shaped sealing ring, and second sealing between the sealing plug and the outer cylinder is achieved by inserting the annular cutting edge into the annular soft metal sealing strip. According to the device, the core barrel can be sealed and stored in a sealed mode, a common lunar soil / lunar rock sample can still be kept in the in-situ pressure environment of the moon after being brought back to the earth, more real scientific data can be conveniently obtained, and deep research on the moon is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of fidelity coring, in particular to a multi-stage sealing device for maintaining vacuum degree on a lunar base. Background Art

[0002] The Chang'e-5 mission of the third phase of the lunar exploration project has achieved my country's first lunar sample return, round-trip space flight and soft landing, lunar sample collection and ground storage missions, with the acquisition and return of lunar samples as the symbol of success, while also carrying out lunar scientific exploration and ground analysis of lunar samples. Before conducting scientific research on the returned lunar samples, how to maximize the protection of lunar samples from the influence of earth factors is a very critical issue, so it is necessary to collect and package lunar soil samples on the lunar surface. After the fidelity corer is drilled, a self-locking claw is installed at the bottom of the core barrel, which can break the lunar rock and recover it to the lunar surface through the corer's retracting mechanism for packaging and storage.

[0003] Existing packaging devices have complex structures and cumbersome operating steps. However, in the complex and extreme external environment of the moon, the simpler the operation, the higher the success rate and the more reliable it is. Utility Model Content

[0004] The utility model provides a multi-stage sealing device for maintaining the vacuum degree of the moon, which is used in the moon sampling and returning mission to realize the primary forming, storage and sealed packaging of the stellar soil samples.

[0005] The utility model is realized by the following technical solutions:

[0006] A multi-stage sealing device for maintaining vacuum degree on a lunar base comprises a sealed cabin, the sealed cabin comprises an outer cylinder and a sealing plug, one end of the outer cylinder is a closed end, and the other end of the outer cylinder is an open end; the sealing plug is adapted to the open end of the outer cylinder and is used to operably seal the opening of the outer cylinder, so that a closed space is formed inside the sealed cabin;

[0007] One of the outer cylinder and the sealing plug is provided with an O-type sealing ring, and the other is provided with a sealing surface adapted to the O-type sealing ring;

[0008] One of the outer cylinder and the sealing plug is provided with an axial annular blade, and the other is provided with an annular soft metal sealing strip adapted to the annular blade;

[0009] When the sealing plug is installed in place, the O-ring realizes the first seal between the sealing plug and the outer tube, and the annular blade cuts into the annular soft metal sealing strip to realize the second seal between the sealing plug and the outer tube.

[0010] Optionally, the sealing surface is a conical surface.

[0011] Optionally, the open end of the outer cylinder has an annular inner step surface coaxial with the outer cylinder, and the annular soft metal sealing strip is mounted on the annular inner step surface.

[0012] Optionally, an annular groove is provided on the annular inner step surface, and the annular soft metal sealing strip is arranged in the annular groove.

[0013] Optionally, the annular soft metal sealing strip is welded in the annular groove.

[0014] Optionally, the sealing plug has an outer step matched with the annular inner step surface, the annular blade is located on the outer step, and the annular blade is made integrally with the outer step and the sealing plug.

[0015] Preferably, the annular soft metal sealing strip is an indium silver alloy.

[0016] Optionally, a limiting structure is provided between the sealing plug and the outer tube, and the limiting structure includes a self-locking buckle and a limiting slot adapted to the self-locking buckle;

[0017] One of the sealing plug and the outer tube is equipped with at least two self-locking buckles, and the other is equipped with a limiting groove adapted to the self-locking buckle, and the limiting groove is annular; the sealing plug is installed into the outer tube, and when the self-locking buckle is inserted into the limiting groove, the sealing plug is installed in place.

[0018] Optionally, the self-locking buckle includes a slider and a spring, and the sealing plug is provided with an installation cavity for installing the self-locking buckle, and the slider and the spring are installed in the installation cavity; under the action of the spring, one end of the slider extends out of the installation cavity, and when the sealing plug is pushed toward the outer tube, the slider compresses the spring and enters the installation cavity; when the self-locking buckle moves to the limit slot, the spring recovers and pushes the slider into the limit slot.

[0019] Optionally, the outer tube includes a first section, a second section, a third section and a fourth section which are connected in sequence, one end of the first section is closed, and the other end of the first section is connected to the second section;

[0020] The inner diameter of the third section is greater than the inner diameter of the first section; the inner wall of the second section is a second inner conical surface, which is used to connect the first section and the third section.

[0021] Optionally, the third section is threadedly connected to the fourth section, the first inner conical surface and the limit groove are arranged on the fourth section, and the third section is threadedly connected to the fourth section.

[0022] Compared with the prior art, this application has at least the following beneficial effects:

[0023] The utility model has simple operation steps and high reliability. In the extremely complex environment of the moon, the core barrel can be sealed and stored only by pressing one action of the manipulator, which is convenient for obtaining more realistic scientific data and conducive to in-depth research on the moon. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is a front view of a multi-stage sealing device for maintaining vacuum degree on a lunar base in an embodiment;

[0026] Figure 2 It is a side view of a multi-stage sealing device for maintaining vacuum degree on a lunar base in an embodiment;

[0027] Figure 3 for Figure 1 Sectional view at AA in the middle;

[0028] Figure 4 for Figure 2 Sectional view at the middle BB;

[0029] Figure 5 It is a top view of a multi-stage sealing device for maintaining vacuum degree on a lunar base in an embodiment;

[0030] Figure 6 for Figure 4 A partial enlarged view of point C in the middle;

[0031] Figure 7 It is a partial structural schematic diagram of a multi-stage sealing device for maintaining vacuum degree at the monthly base after the sealing plug is installed in place in the embodiment;

[0032] Figure 8 is a schematic diagram of the structure of the sealing plug in the embodiment;

[0033] Fig. 9 Schematic diagram of the structure of the outer cylinder in the embodiment. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other.

[0036] In the description of the present utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, or the orientation or position relationship commonly understood by those skilled in the art, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] like Figure 1-Figure 7 As shown, the present embodiment discloses a multi-stage sealing device for maintaining vacuum degree on a lunar base, comprising a sealed cabin, wherein the sealed cabin comprises an outer cylinder 1 and a sealing plug 2, wherein one end of the outer cylinder 1 is a closed end, and the other end of the outer cylinder 1 is an open end; the sealing plug 2 is adapted to the opening of the open end of the outer cylinder 1, and is used to operably seal the opening, so that a closed space is formed inside the sealed cabin.

[0039] When the sealing plug 2 is installed in place, at least two sealing pairs are formed between the sealing plug 2 and the outer tube 1 .

[0040] The outer tube 1 and the sealing plug 2 have an annular groove 22 on one of them, an O-type sealing ring 41 is installed in the annular groove 22, and the other has a sealing surface adapted to the O-type sealing ring 41;

[0041] The outer cylinder 1 and the sealing plug 2 have an axial annular blade 21 on one of them, and an annular soft metal sealing strip 42 adapted to the annular blade 21 on the other;

[0042] When the sealing plug 2 is installed in place, the O-ring 41 realizes the first seal between the sealing plug 2 and the outer tube 1 , and the annular blade 21 cuts into the annular soft metal sealing strip 42 to realize the second seal between the sealing plug 2 and the outer tube 1 .

[0043] In one possible design, the open end of the outer cylinder 1 has a first inner conical surface 11 coaxial with the outer cylinder 1, the sealing plug 2 has an outer conical surface adapted to the first inner conical surface 11, and the O-ring 41 is installed on the first inner conical surface 11 of the outer cylinder 1, or the O-ring 41 is installed on the outer conical surface of the sealing plug 2.

[0044] In a possible design, the open end of the outer cylinder 1 has an annular inner step surface 12 coaxial with the outer cylinder 1 , and the annular soft metal sealing strip 42 is mounted on the annular inner step surface 12 .

[0045] Optionally, an annular groove is provided on the annular inner step surface 12 , and the annular soft metal sealing strip 42 is installed in the annular groove, and the top surface of the annular soft metal sealing strip 42 is flush with the annular inner step surface 12 .

[0046] It is worth noting that the material of the annular soft metal sealing strip 42 is reasonably selected according to the needs. Preferably, the annular soft metal sealing strip 42 is an indium silver alloy.

[0047] Optionally, the indium silver alloy is welded in the annular groove before emitting, and the capping surface is flush with the annular groove.

[0048] In a possible design, the sealing plug 2 has an outer step matched with the annular inner step surface 12 , and the annular blade 21 is located on the outer step and is made integrally with the outer step and the sealing plug 2 .

[0049] In one possible design, Figure 6-Figure 8 As shown, in order to prevent the sealing plug 2 from shifting in the opposite direction, a limiting structure is provided between the sealing plug 2 and the outer tube 1 , and the limiting structure includes a self-locking buckle 3 and a limiting groove 13 adapted to the self-locking buckle 3 .

[0050] One of the sealing plug 2 and the outer tube 1 is provided with a self-locking buckle 3, and the other is provided with a limiting card slot 13 adapted to the self-locking buckle 3. The sealing plug 2 is installed into the outer tube 1, and when the self-locking buckle 3 is inserted into the limiting card slot 13, the sealing plug 2 is installed in place.

[0051] It is worth noting that the number of the self-locking buckles 3 is reasonable according to the needs. Generally speaking, it is appropriate to provide at least two self-locking buckles 3, and it is better to arrange at least two self-locking buckles 3 at equal intervals in the circumferential direction.

[0052] Optionally, the self-locking buckle 3 is mounted on the sealing plug 2 and is located at the outer end of the annular blade 21, and the limiting groove 13 is annular.

[0053] Optionally, the inner wall of the outer tube 1 has a guide cone 14 adapted to the self-locking buckle 3 .

[0054] Optionally, for easy operation, a handle 24 is provided at the outer end of the sealing plug 2 .

[0055] Optionally, the self-locking buckle 3 includes a slider 31 and a spring 32 behind the slider 31. There is an installation cavity 23 for installing the self-locking buckle 3 on the sealing plug 2. The slider 31 and the spring 32 are installed in the installation cavity 23. Under the action of the spring 32, one end of the slider 31 extends out of the installation cavity 23. The manipulator pushes down the handle 24, and the slider 31 compresses the spring 32 to enter the installation cavity 23; when it moves to the limit slot 13, the spring 32 recovers and pushes the slider 31 into the limit slot 13 to achieve self-locking.

[0056] In one possible design, Fig. 9 As shown, the outer cylinder 1 includes a first section 101, a second section 102, a third section 103 and a fourth section 104 which are connected in sequence. One end of the first section 101 is closed, and the other end of the first section 101 is connected to the second section 102. The inner diameter of the third section 103 is larger than the inner diameter of the first section 101. The inner wall of the second section 102 is a second inner conical surface 15, which is used to connect the first section 101 and the third section 103. The first inner conical surface 11 and the limit groove 13 are arranged on the fourth section 104. The third section 103 is threadedly connected to the fourth section 104, so that the fourth section 104 can be unscrewed and the core cylinder 5 can be taken out.

[0057] In a possible design, the outer diameters of the first section 101 , the second section 102 , and the third section 103 are equal, and the outer diameter of the fourth section 104 is greater than the outer diameter of the third section 103 .

[0058] The method of using this embodiment is as follows:

[0059] After coring is completed, the core barrel 5 is taken out, which is a conventional technique in the art and will not be described in detail here;

[0060] The core barrel 5 is clamped by the mechanical arm and placed into the outer barrel 1: the inner diameter of the first section 101 is adapted to the outer diameter of the core barrel 5, and the second inner conical surface 15 of the second section 102 can guide the lower end of the core barrel 5 into the first section 101, which can prevent the core barrel 5 from shaking during the return of coring and play a fixing role;

[0061] By applying a downward force F by the manipulator, the annular blade 21 at the bottom of the sealing plug 2 can be cut into the annular soft metal sealing strip 42; forming a double seal with the O-ring 41, the pressure becomes tighter after reaching the earth; and the sealing plug 2 can be clamped and fixed by the self-locking buckle 3 to prevent accidental withdrawal.

[0062] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-stage sealing device for maintaining vacuum degree on a monthly basis, characterized in that: The sealed cabin comprises an outer cylinder (1) and a sealing plug (2), wherein one end of the outer cylinder (1) is a closed end and the other end of the outer cylinder (1) is an open end; the sealing plug (2) is adapted to the open end of the outer cylinder (1) and is used to operably seal the opening of the outer cylinder (1), so that a closed space is formed inside the sealed cabin; One of the outer cylinder (1) and the sealing plug (2) is provided with an O-type sealing ring (41), and the other is provided with a sealing surface adapted to the O-type sealing ring (41); One of the outer cylinder (1) and the sealing plug (2) is provided with an axial annular blade (21), and the other is provided with an annular soft metal sealing strip (42) adapted to the annular blade (21); When the sealing plug (2) is installed in place, the O-ring (41) realizes the first seal between the sealing plug (2) and the outer tube (1), and the annular blade (21) cuts into the annular soft metal sealing strip (42) to realize the second seal between the sealing plug (2) and the outer tube (1).

2. A multi-stage sealing device for maintaining vacuum degree on a monthly basis according to claim 1, characterized in that: The sealing surface is a conical surface.

3. A multi-stage sealing device for maintaining vacuum degree on a monthly basis according to claim 1, characterized in that: The open end of the outer cylinder (1) has an annular inner step surface (12) coaxial with the outer cylinder (1), and the annular soft metal sealing strip (42) is mounted on the annular inner step surface (12).

4. A multi-stage sealing device for maintaining vacuum degree on a monthly basis according to claim 1, characterized in that: An annular groove is arranged on the annular inner step surface (12), and an annular soft metal sealing strip (42) is arranged in the annular groove.

5. A multi-stage sealing device for maintaining vacuum degree on a monthly basis according to claim 3, characterized in that: The sealing plug (2) has an outer step adapted to the annular inner step surface (12), the annular blade (21) is located on the outer step, and the annular blade (21) is integrally manufactured with the outer step and the sealing plug (2).

6. A multi-stage sealing device for maintaining vacuum degree on a monthly basis according to claim 1, characterized in that: The annular soft metal sealing strip (42) is an indium silver alloy.

7. A multi-stage sealing device for maintaining vacuum degree on a monthly basis according to any one of claims 1 to 6, characterized in that: A limiting structure is provided between the sealing plug (2) and the outer tube (1), wherein the limiting structure comprises a self-locking buckle (3) and a limiting groove (13) adapted to the self-locking buckle (3); One of the sealing plug (2) and the outer tube (1) is provided with at least two self-locking buckles (3), and the other is provided with a limiting groove (13) adapted to the self-locking buckle (3), wherein the limiting groove (13) is annular; The sealing plug (2) is installed into the outer tube (1), and when the self-locking buckle (3) is locked into the limiting groove (13), the sealing plug (2) is installed in place.

8. A multi-stage sealing device for maintaining vacuum degree on a monthly basis according to claim 7, characterized in that: The self-locking buckle (3) comprises a slider (31) and a spring (32); a mounting cavity (23) for mounting the self-locking buckle (3) is provided on the sealing plug (2); the slider (31) and the spring (32) are mounted in the mounting cavity (23); under the action of the spring (32), one end of the slider (31) extends out of the mounting cavity (23); when the sealing plug (2) is pushed into the outer tube (1), the slider (31) compresses the spring (32) and enters the mounting cavity (23); when the self-locking buckle (3) moves to the position of the limiting slot (13), the spring (32) recovers and pushes the slider (31) to be locked into the limiting slot (13).

9. A multi-stage sealing device for maintaining monthly vacuum according to any one of claims 1-6 and 8, characterized in that: The outer cylinder (1) comprises a first section (101), a second section (102), a third section (103) and a fourth section (104) which are connected in sequence, wherein one end of the first section (101) is closed, and the other end of the first section (101) is connected to the second section (102); The inner diameter of the third section (103) is greater than the inner diameter of the first section (101); the inner wall of the second section (102) is a second inner conical surface (15) for connecting the first section (101) and the third section (103).

10. A multi-stage sealing device for maintaining vacuum degree on a monthly basis according to claim 9, characterized in that: The third section (103) is threadedly connected to the fourth section (104), and the first inner conical surface (11) and the limiting groove (13) are arranged on the fourth section (104).

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