Extraterrestrial celestial body sample container

Abstract

The invention discloses an extraterrestrial celestial body sample container. An annular sealing groove is formed in the opening side of a container main body of the container; the metal sealing bush is brazed in the annular sealing groove and is provided with an open slot; the cover body is provided with a knife edge with a hollow structure; the heating element is embedded in the hollow structure of the knife edge; when the cover body seals the opening of the container main body, the knife edge is extruded into the opening groove of the metal sealing bush, the heating element heats to melt the metal sealing bush, and after the metal sealing bush is melted to form molten metal, the molten metal flows in the annular sealing groove and completely fills a gap between the knife edge and the container main body. And the heating element stops heating, the molten metal is cooled and solidified, the knife edge and the container body are sealed and brazed together, and a sealing structure is formed between the container body and the cover body to achieve sealing. The container is sealed through metal, the sealing leakage rate can be better than 1 * 10 <-9 > Pa.m < 3 > / s, and the container can also adapt to the temperature environment of the surface of spark.

Description

Technical Field

[0001] The invention belongs to the technical field of sealing and packaging of extraterrestrial body samples, and in particular relates to an extraterrestrial body sample container. Background Art

[0002] For the first Mars sample return mission, a sealing solution suitable for Martian samples needs to be designed.

[0003] In order to ensure that the collected samples are not contaminated, a higher sealing leakage rate is required. At the same time, since the surface temperature of Mars is as low as -130°C, conventional non-metallic sealing materials cannot be used at this temperature. Drawing on the extraterrestrial sample sealing technology at home and abroad, the present invention designs a sample sealing solution using low-melting-point metals as sealing elements. Summary of the invention

[0004] Aiming at the first Mars sampling and return mission, the present invention provides an extraterrestrial sample container, which adopts metal sealing and can achieve a sealing leakage rate better than 1x10 -9 Pa.m 3 / s, and can also adapt to the temperature environment on the surface of Mars.

[0005] In order to achieve the above object, the present invention adopts the following specific technical solutions:

[0006] An extraterrestrial body sample container, comprising a container body, a cover body, a metal sealing sleeve and a heating element;

[0007] An annular sealing groove is provided on the opening side of the container body;

[0008] The metal sealing bushing is brazed in the annular sealing groove and is provided with an open groove;

[0009] The cover body is provided with a knife edge, and the knife edge is a hollow structure;

[0010] The heating element is embedded in the hollow structure of the knife edge and is used to heat the metal sealing bushing to melt it;

[0011] When the cover seals the opening of the container body, the blade is squeezed into the opening groove of the metal sealing bushing, and the heating element heats the metal sealing bushing to melt it. After the metal sealing bushing melts to form molten metal, the molten metal flows in the annular sealing groove and completely fills the gap between the blade and the container body. The heating element stops heating, and the molten metal cools and solidifies to seal and braze the blade and the container body together, forming a sealing structure between the container body and the cover to achieve sealing of the sample.

[0012] Furthermore, the metal sealing bushing is made of low melting point metal.

[0013] Furthermore, the cross-sectional shape of the metal sealing bushing is U-shaped.

[0014] Furthermore, it also includes sealing rings arranged on both sides of the knife edge;

[0015] When the knife edge is squeezed into the open groove of the metal sealing bushing, the sealing ring is squeezed and deformed and sealed between the container body and the cover body, thereby sealing the annular sealing groove to form a closed molten pool. The molten metal can flow in the molten pool, and the sealing ring prevents the molten metal from flowing out of the outside of the annular sealing groove.

[0016] Furthermore, the sealing ring is bonded to the cover body by vulcanization.

[0017] Furthermore, the outer peripheral surface of the blade is provided with an embedding groove for limiting the sealing ring.

[0018] Furthermore, it also includes a cover pressing mechanism installed on the cover and the container body, and the cover pressing mechanism is used to drive the cover to move toward the container body, so as to press the cover to the container body.

[0019] Furthermore, after the container body and the cover are sealed, the sealing leakage rate of the container is not higher than 1×10 - 9 Pa.m 3 / s.

[0020] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0021] The extraterrestrial body sample container of the present invention is provided with a knife edge of a hollow structure on the cover body, and a heating element is embedded in the hollow structure of the knife edge. The metal sealing bushing installed in the annular sealing groove of the container body is heated by the heating element to melt it. After melting, the molten metal flows in the annular sealing groove to fill the gap between the knife edge and the container body. After the heating element stops heating, the molten metal cools and solidifies to seal and braze the knife edge and the container body together, thereby forming a metal sealing structure between the container body and the cover body to achieve sealing of the sample. The container adopts metal sealing to achieve low leakage rate sealing of the sample and adaptability to the low temperature environment on the surface of Mars, and can make the sealing leakage rate of the container better than 1x10 -9 Pa.m 3 / s, which solves the problem that existing conventional non-metallic sealing materials cannot be used on the Martian surface at -130℃. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The state of the extraterrestrial body sample container before sealing of the present invention;

[0023] Figure 2 This is the sealed state of the extraterrestrial body sample container of the present invention.

[0024] Figure numerals: 1-container body; 2-metal sealing bushing; 3-sealing ring; 4-cover body; 5-heating element; 6-cover body clamping mechanism. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] like Figure 1 and Figure 2 As shown in the structure, an embodiment of the present invention provides an extraterrestrial sample container, which includes a container body 1, a cover body 4, a metal sealing sleeve 2 and a heating element 5; Figure 1 and Figure 2 As shown, the container body 1 may be a cylindrical structure with an open top and a closed bottom; the cover body 4 can be openably and closably disposed on the top of the container body 1 to control the opening and closing of the top opening;

[0027] An annular sealing groove is provided on the opening side of the container body 1, and a metal sealing bushing 2 is brazed in the annular sealing groove; the cross-sectional shape of the metal sealing bushing 2 can be U-shaped, and an open groove is provided on the side facing the cover body 4, and the cross-sectional shape of the open groove can be rectangular, U-shaped, semicircular, etc. The metal sealing bushing 2 is made of a low melting point metal.

[0028] The cover body 4 is provided with a knife edge on one side facing the annular sealing groove, and the knife edge is a hollow structure for installing the heating element 5; the heating element 5 is embedded in the hollow structure of the knife edge, and is used to heat the metal sealing bushing 2 to melt it; the heating element 5 can be an electric heating element 5; the knife edge with a hollow structure is adopted, so that the heating element 5 is installed in the hollow structure of the knife edge, which not only realizes the hidden installation of the heating element 5, but also makes the heating element 5 as close as possible to the metal sealing bushing 2 that needs to be melted and sealed, and avoids the defect of increasing the complexity of the structure by setting the heating element 5 separately.

[0029] like Figure 2As shown in the figure, when the cover 4 seals the opening of the container body 1, the knife edge is squeezed into the opening groove of the metal sealing bushing 2, and the heating element 5 heats the metal sealing bushing 2 to melt it. After the metal sealing bushing 2 melts to form molten metal, the molten metal flows in the annular sealing groove and completely fills the gap between the knife edge and the container body 1. The heating element 5 stops heating, and the molten metal cools and solidifies to seal and braze the knife edge and the container body 1 together, forming a sealing structure between the container body 1 and the cover 4 to achieve the sealing of the sample. After the container body 1 and the cover 4 are sealed, the sealing leakage rate of the container is not higher than 1x10 - 9 Pa.m 3 / s.

[0030] The above-mentioned extraterrestrial body sample container is provided with a hollow knife edge on the cover body 4, and a heating element 5 is embedded in the hollow structure of the knife edge. The metal sealing bushing 2 installed in the annular sealing groove of the container body 1 is heated by the heating element 5 to melt it. After melting, the molten metal flows in the annular sealing groove to fill the gap between the knife edge and the container body 1. After the heating element 5 stops heating, the molten metal cools and solidifies to seal and braze the knife edge and the container body 1 together, thereby forming a metal sealing structure between the container body 1 and the cover body 4 to achieve the sealing of the sample; the container adopts metal sealing to achieve low leakage rate sealing of the sample and adaptability to the low temperature environment on the surface of Mars, and can make the sealing leakage rate of the container better than 1x10 - 9 Pa.m 3 / s, which solves the problem that existing conventional non-metallic sealing materials cannot be used on the Martian surface at -130℃.

[0031] like Figure 1 and Figure 2 As shown, the above-mentioned extraterrestrial body sample container further includes sealing rings 3 arranged on both sides of the knife edge, and a cover pressing mechanism 6 installed on the cover body 4 and the container body 1; the cross-sectional shape of the sealing ring 3 can be circular, rectangular, etc. The sealing ring 3 is bonded to the cover body 4 by vulcanization. A sealing ring 3 is respectively arranged on the inner circumference and outer circumference of the knife edge of the cover body 4, and an embedding groove is arranged on the outer circumference of the knife edge, and the sealing ring 3 installed on the outer circumference of the knife edge is limited by the embedding groove, and the sealing ring 3 can be limited in the circumferential direction and axial direction by the embedding groove, so as to ensure the sealing effect.

[0032] When the knife edge is pressed into the open groove of the metal sealing bushing 2, the sealing ring 3 is squeezed and deformed and sealed between the container body 1 and the cover 4, thereby sealing the annular sealing groove to form a closed molten pool, in which the molten metal can flow, and the sealing ring 3 prevents the molten metal from flowing out of the annular sealing groove. The cover pressing mechanism 6 is used to drive the cover 4 to move toward the container body 1, thereby pressing the cover 4 against the container body 1.

[0033] Figure 2 In the sealed state of the extraterrestrial sample container, the cover pressing mechanism 6 drives the cover 4 to move downward, so that the hollow blade enters the groove of the low-melting-point sealing metal. At the same time, the container body 1 and the cover 4 squeeze the sealing ring 3 to form a closed molten pool in the annular sealing groove of the container body 1; the heating element 5 is powered on to heat the blade of the cover 4 and transfer the heat to the low-melting-point metal through the blade. After the heating element 5 is heated at a certain power for a period of time, the low-melting-point metal is completely melted, and the molten metal liquid will flow in the molten pool formed by the sealing ring 3 on both sides of the blade, and completely fill the gap between the blade and the annular sealing groove of the container body 1. After the heating element 5 stops heating, the metal liquid cools and brazes the sealing blade and the container body 1 together to achieve the sealing of the sample.

[0034] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An extraterrestrial sample container, characterized in that: It includes a container body, a cover body, a metal sealing bushing and a heating element; An annular sealing groove is provided on the opening side of the container body; The metal sealing bushing is brazed in the annular sealing groove and is provided with an open groove; The cover body is provided with a knife edge, and the knife edge is a hollow structure; The heating element is embedded in the hollow structure of the knife edge and is used to heat the metal sealing bushing to melt it; When the cover seals the opening of the container body, the blade is squeezed into the opening groove of the metal sealing bushing, and the heating element heats the metal sealing bushing to melt it. After the metal sealing bushing melts to form molten metal, the molten metal flows in the annular sealing groove and completely fills the gap between the blade and the container body. The heating element stops heating, and the molten metal cools and solidifies to seal and braze the blade and the container body together, forming a sealing structure between the container body and the cover to achieve sealing of the sample.

2. The extraterrestrial body sample container according to claim 1, characterized in that: The metal sealing bushing is made of low melting point metal.

3. The extraterrestrial body sample container according to claim 2, characterized in that: The cross-sectional shape of the metal sealing bushing is U-shaped.

4. The extraterrestrial body sample container according to claim 2, characterized in that: It also includes sealing rings arranged on both sides of the knife edge; When the knife edge is squeezed into the open groove of the metal sealing bushing, the sealing ring is squeezed and deformed and sealed between the container body and the cover body, thereby sealing the annular sealing groove to form a closed molten pool. The molten metal can flow in the molten pool, and the sealing ring prevents the molten metal from flowing out of the outside of the annular sealing groove.

5. The extraterrestrial body sample container according to claim 4, characterized in that: The sealing ring is bonded to the cover body by vulcanization.

6. The extraterrestrial body sample container according to claim 4, characterized in that: The outer peripheral surface of the knife edge is provided with an embedding groove for limiting the sealing ring.

7. The extraterrestrial body sample container according to any one of claims 1 to 6, characterized in that: It also includes a cover pressing mechanism installed on the cover and the container body, and the cover pressing mechanism is used to drive the cover to move toward the container body, so as to press the cover against the container body.

8. The extraterrestrial body sample container according to any one of claims 1 to 6, characterized in that: After the container body and the cover are sealed, the sealing leakage rate of the container is not higher than 1x10 -9 Pa.m 3 / s.

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