CN113295731A - Powder sample thermophysical property testing device and method under low-gravity high-vacuum environment - Google Patents
Powder sample thermophysical property testing device and method under low-gravity high-vacuum environment Download PDFInfo
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- CN113295731A CN113295731A CN202110573325.9A CN202110573325A CN113295731A CN 113295731 A CN113295731 A CN 113295731A CN 202110573325 A CN202110573325 A CN 202110573325A CN 113295731 A CN113295731 A CN 113295731A
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- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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Abstract
The invention provides a device and a method for testing the thermophysical properties of a powder sample in a low-gravity high-vacuum environment, wherein the device comprises the following steps: the heat conduction test system comprises a heat conduction test control module, a sample support, an interrupt probe, a vacuum device and a magnetic gravity system, wherein the interrupt probe comprises a probe line and a plug line, two ends of the plug line are respectively connected with the heat conduction test control module and the vacuum device, one end of the probe line is respectively connected with the sample support, the other end of the probe line is connected with the vacuum device through a vacuum aviation plug, and the sample support is arranged in the vacuum device. The invention has the beneficial effects that: the invention can carry out the composite environment thermophysical property test conditions under different conditions, can be used for testing the thermophysical properties of samples with different pore ratios and particle compositions under a complex environment, is convenient for exploring the thermophysical properties of the planet soil, and has transient thermophysical property test, short time, high precision, no damage to the samples and extremely high economic value.
Description
Technical Field
The invention relates to the technical field of testing devices, in particular to a device and a method for testing the thermophysical properties of a powder sample in a low-gravity high-vacuum environment.
Background
With the continuous development of outer space exploration and development, it is known that when a semi-underground or underground base is constructed, the change of a temperature field directly causes the change of underground constant temperature design, mechanical properties of a star soil bearing layer, basic stability and the like, and thermophysical properties of the star soil under different gravity and vacuum environments are main influence factors of the temperature field. When a thermophysical property test is carried out in a laboratory, different vacuum degrees and gravity are difficult to create and control simultaneously, and the thermophysical property test of a powder sample as a bulk material is more difficult, so that the invention is necessary to invent a device which can be suitable for the thermophysical property test of the magnetic conductive powder sample under different vacuum and different gravity field complex environmental fields.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
Therefore, the technical problem to be solved by the invention is to create and control different vacuum degrees and gravity simultaneously, meet the thermal physical property test tests of the magnetic conductive powder samples under different conditions, and simultaneously protect the probe from being damaged.
In order to solve the technical problems, the invention provides the following technical scheme: the device comprises a heat conduction test control module, a sample support, an interrupt probe, a vacuum device and a magnetic gravity system, wherein the vacuum device is used for providing a vacuum environment, the magnetic gravity system is used for providing a gravity environment, the interrupt probe comprises a probe line and a plug line, two ends of the plug line are respectively connected with the heat conduction test control module and the vacuum device, one end of the probe line is respectively connected with the sample support, the other end of the probe line is connected with the vacuum device through a vacuum aviation plug, and the sample support is arranged in the vacuum device.
The invention relates to a preferable scheme of a powder sample thermophysical property testing device under a low-gravity high-vacuum environment, wherein: the vacuum device is of an L-shaped structure, one side of the vacuum device extends into the magnetic gravity system and is fixedly connected with the magnetic gravity system through a vacuum flange plate, a bottom support is arranged at the end part of the vacuum device, the sample support is placed on the bottom support, a plurality of electric wire cabin penetrating holes are vertically formed in the other edge of the vacuum device, and the vacuum aviation plug is inserted into the electric wire cabin penetrating holes.
The invention relates to a preferable scheme of a powder sample thermophysical property testing device under a low-gravity high-vacuum environment, wherein: the plug end of the plug wire is electrically connected with the heat conduction test control module, the wire head end of the plug wire is connected with the vacuum aviation plug, the probe end of the probe wire is connected to the sample support, the wire head end of the probe wire penetrates through the electric wire cabin penetrating hole to be connected with the vacuum aviation plug, and a gate valve and a deflation valve are further arranged in the vacuum device.
The invention relates to a preferable scheme of a powder sample thermophysical property testing device under a low-gravity high-vacuum environment, wherein: the sample support comprises an upper middle ring and a lower middle ring, an upper cover body and a lower cover body are arranged on the lower portion of the upper middle ring, a groove is concavely carved in the lower cover body, clamping pieces are respectively arranged on one sides of the upper cover body and the lower cover body, and the probe end of the probe line is arranged in the middle of the clamping pieces to be fixed.
The invention relates to a preferable scheme of a powder sample thermophysical property testing device under a low-gravity high-vacuum environment, wherein: the heat conduction test control module is a Hot Disk heat conduction instrument or a heat probe heat conduction instrument.
The invention aims to solve another technical problem of providing a method for testing the thermophysical properties of a powder sample in a low-gravity high-vacuum environment, which comprises the following steps of: firstly, adding magnetic powder into a lower cover of the sample support and controlling the mass and volume of the magnetic powder, then placing the probe end above a sample, fixing the probe end by using the clamping piece, and finally fixing the upper cover body and adding the magnetic powder into the upper cover body;
a wiring step: firstly, placing the sample support filled with powder at the bottom of a small-gravity vacuum cavity in a vacuum system, then, enabling the wire end of the probe wire to penetrate through the circuit cabin penetrating hole in a vacuum flange plate, connecting the probe wire with the vacuum aviation plug through soldering, fixing the probe wire on the vacuum flange plate, and finally, connecting the plug end of the plug wire with the heat conduction test module, wherein the wire end section of the plug wire is connected with the other end of the vacuum aviation plug;
the testing steps are as follows: the method comprises the steps of firstly opening a vacuum pump, obtaining the vacuum degree in a vacuum cavity through an external vacuum meter, closing a gate valve in a vacuum system when the vacuum degree reaches a preset value, keeping the vacuum in the cavity, then opening a magnetic gravity system, adjusting the gravity of an effective magnetic field area, and finally opening a heat conduction test control module for testing.
The invention has the beneficial effects that: the invention can carry out the composite environment thermophysical property test conditions under different conditions, can be used for testing the thermophysical properties of samples with different pore ratios and particle compositions under a complex environment, is convenient for exploring the thermophysical properties of the planet soil, and has transient thermophysical property test, short time, high precision, no damage to the samples and extremely high economic value.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
FIG. 1 is a schematic sectional view of a powder sample thermophysical property testing device under a low-gravity high-vacuum environment according to the invention;
FIG. 2 is a schematic connection diagram of the powder sample thermophysical property testing device under a low-gravity high-vacuum environment according to the invention;
FIG. 3 is an exploded view of a sample holder of the device for testing the thermophysical properties of the powder sample under a low-gravity high-vacuum environment according to the invention;
wherein: the device comprises a heat conduction test control module 1, a sample support 2, an interrupt probe 3, a vacuum device 4, a magnetic gravity system 5, a vacuum aviation plug 6, a vacuum flange 7, a bottom support 8, a wire penetration hole 9, a gate valve 10, a deflation valve 11, an upper middle ring 21, a lower middle ring 22, an upper cover 23, a lower cover 24, a groove 25, a clamping piece 26, a probe wire 31, a plug wire 32, a probe end 311, a wire end 312, a plug end 321 and a wire end 322.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Referring to fig. 1 to 3, this embodiment provides a device for testing the thermal properties of a powder sample in a low-gravity high-vacuum environment, as shown in fig. 1 and 2, the device for testing the thermal properties of a powder sample in a low-gravity high-vacuum environment, comprising: the device comprises a heat conduction test control module 1, a sample support 2, an interrupt type probe 3, a vacuum device 4 and a magnetic gravity system 5, wherein the vacuum device 4 is used for providing a vacuum environment, the magnetic gravity system 5 is used for providing a gravity environment, the interrupt type probe 3 comprises a probe line 31 and a plug line 32, two ends of the plug line 32 are respectively connected with the heat conduction test control module 1 and the vacuum device 4, one end of the probe line 31 is respectively connected with the sample support 2, the other end of the probe line is connected with the vacuum device 4 through a vacuum aviation plug 6, and the sample support 2 is placed in the vacuum device 4.
Specifically, as shown in the figure, the heat conduction test control module 1 is used for analyzing test data, the heat conduction test control module 1 may be a HotDisk heat conduction instrument or a thermal probe heat conduction instrument in the prior art, for the sample holder 2, the heat conduction test control module is used for protecting the probe, loading the pressure and placing the powder sample, the interrupt-type probe 3 is used for connecting each part of the device, the vacuum device 4 is used for providing a vacuum environment, the vacuum device 4 is a mechanical pump and a molecular pump connected in series and can provide a vacuum environment with a limit of 10-5Pa and a controllable range of 10 Pa-1 atm, the magnetic gravity system 5 is used for providing a gravity environment, i.e. providing a small gravity environment of 0-10 g in a stepless adjustment manner, further, for the interrupt-type probe 3, which includes two parts, namely a probe line 31 and a plug line 32, two ends of the plug line 32 are respectively connected with the heat conduction test control module 1 and the vacuum device 4, one end of the probe line 31 is respectively connected with the sample holder 2, the other end is connected with a vacuum device 4 through a vacuum aviation plug 6, further, as shown in fig. 2, a plug end 321 of a plug wire 32 is electrically connected with the heat conduction test control module 1, a wire head end 322 of the plug wire 32 is connected with the vacuum aviation plug 6, a probe end 311 of a probe wire 31 is connected on the sample support 2, a wire head end 312 of the probe wire 31 passes through a wire penetration hole 9 to be connected with the vacuum aviation plug 6, the middle breaking part of the interrupt type probe 3 is matched with the vacuum aviation plug 6 to maintain the vacuum in the cavity, the sample support 2 is placed in the vacuum device 4, and the vacuum device 4 provides a required vacuum environment for the sample in the sample support 2.
In addition, as shown in fig. 1 and fig. 2, the vacuum device 4 is an L-shaped structure, one side of the vacuum device 4 extends into the magnetic gravity system 5 and is fixedly connected through a vacuum flange 7, the shape of one side of the vacuum device 4 is completely matched with the shape structure of the magnetic gravity system 5, so that the effect of coupling two physical fields can be achieved, meanwhile, a bottom support 8 is arranged at the bottom end position of the vacuum device 4, the sample holder 2 is placed on the bottom support 8, one side vacuum cavity of the vacuum device 4 is placed in the magnetic gravity system 5, namely, a sample in the sample holder 2 is in a high vacuum and low gravity environment, a plurality of wire penetration holes 9 are vertically arranged at the other side of the vacuum device 4, the vacuum aviation plug 6 is inserted in the wire penetration holes 9, namely, two sides of the vacuum aviation plug 6 are respectively connected with the wire end 322 of the plug wire 32 and the wire end 312 of the probe wire 31, to the electric wire interlining hole 9 that sets up, its outside is connected with the vacuum gauge, the electric wire interlining hole 9 of vacuum gauge can directly connect through the welding, need not dismantle, in order to satisfy the needs of sample holder 2 dress appearance repeatedly, still be provided with push-pull valve 10 and bleed valve 11 in the vacuum apparatus 4, when carrying out vacuum operation, the vacuum pump work, obtain the vacuum in the 4 cavitys of vacuum apparatus through external vacuum gauge, when the vacuum degree reaches the predetermined value, close push-pull valve 10 in the vacuum apparatus 4, keep the intracavity vacuum, bleed valve 11 is used for the test to resume the intracavity air pressure after finishing, i.e. push-pull valve 10 and bleed valve 11 are used for adjusting the vacuum in the control vacuum apparatus 4.
As shown in fig. 3, the sample holder 2 includes an upper middle ring 21 and a lower middle ring 22, the lower portion of the upper middle ring 21 is provided with an upper cover body 23 and a lower cover body 24, the lower cover body 24 is concavely carved with a groove 25, the upper cover body 23 and the lower cover body 24 are respectively provided with a clamping piece 26 at one side, the probe end 311 of the probe wire 31 is arranged in the middle of the clamping piece 26 for fixing, the sample holder 2 is made of non-magnetic stainless steel, and it should be noted that for the sample, the sample powder is powder with magnetic permeability, in use, the lower middle ring 22 is firstly placed on the step of the lower cover body 24, then the magnetic conductive powder sample is added into the lower cover body 24 of the sample support 2 and the mass volume of the sample is controlled, the probe end 311 of the probe wire 31 is then placed over the sample and secured with the clip 26, and finally the upper cover 23 is secured and the magnetically conductive powder is added thereto and pressurized with the upper middle 21.
The invention also provides a powder sample thermophysical property test method under the low-gravity high-vacuum environment, and the method adopts the test device and comprises the following steps:
(1) sample loading: firstly, adding magnetic powder into the lower cover 24 of the sample support 2 and controlling the mass and volume of the magnetic powder, then placing the probe end 311 above the sample and fixing the probe end by using the clamping piece 26, and finally fixing the upper cover body 23 and adding the magnetic powder into the upper cover body;
(2) a wiring step: firstly, placing a sample bracket 2 filled with powder at the bottom of a small-gravity vacuum cavity in a vacuum system, then, enabling a wire end 32 of a probe wire 31 to penetrate through a circuit cabin penetrating hole 9 on a vacuum flange plate, connecting the wire end with a vacuum aviation plug 6 through soldering, fixing the wire end on the vacuum flange plate, finally, connecting a plug end 321 of the plug wire 32 with a heat conduction test module 1, and connecting a wire end section 322 of the plug wire 32 with the other end of the vacuum aviation plug 6;
(3) the testing steps are as follows: the method comprises the steps of firstly opening a vacuum pump, obtaining the vacuum degree in a vacuum cavity through an external vacuum gauge, closing a gate valve 10 in a vacuum system when the vacuum degree reaches a preset value, keeping the vacuum in the cavity, then opening a magnetic gravity system 5, adjusting the gravity of an effective magnetic field area, and finally opening a heat conduction test control module 1 for testing.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (6)
1. The utility model provides a powder sample thermophysical property testing arrangement under high vacuum environment of low gravity which characterized in that: the device comprises a heat conduction test control module (1), a sample support (2), an interrupted probe (3), a vacuum device (4) and a magnetic gravity system (5), wherein the vacuum device (4) is used for providing a vacuum environment, the magnetic gravity system (5) is used for providing a gravity environment, the interrupted probe (3) comprises a probe wire (31) and a plug wire (32), two ends of the plug wire (32) are respectively connected with the heat conduction test control module (1) and the vacuum device (4), one end of the probe wire (31) is respectively connected with the sample support (2), the other end of the probe wire is connected with the vacuum device (4) through a vacuum aviation plug (6), and the sample support (2) is arranged in the vacuum device (4).
2. The device for testing the thermophysical properties of the powder sample in the low-gravity high-vacuum environment according to claim 1, wherein: the vacuum device (4) is of an L-shaped structure, one side of the vacuum device (4) extends into the magnetic gravity system (5) and is fixedly connected with the magnetic gravity system through a vacuum flange plate (7), a bottom support (8) is arranged at the end of the vacuum device, the sample support (2) is placed on the bottom support (8), a plurality of electric wire cabin penetrating holes (9) are vertically formed in the other edge of the vacuum device (4), and the vacuum aviation plug (6) is inserted into the electric wire cabin penetrating holes (9).
3. The device for testing the thermophysical properties of the powder sample in the low-gravity high-vacuum environment according to claim 2, wherein: the plug end (321) of the plug wire (32) is electrically connected with the heat conduction test control module (1), the line head end (322) of the plug wire (32) is connected with the vacuum aviation plug (6), the probe end (311) of the probe wire (31) is connected to the sample support (2), the line head end (312) of the probe wire (31) penetrates through the wire cabin penetrating hole (9) to be connected with the vacuum aviation plug (6), and a gate valve (10) and a vent valve (11) are further arranged in the vacuum device (4).
4. The device for testing the thermophysical properties of a powder sample in a low-gravity high-vacuum environment according to any one of claims 1 to 3, wherein: the sample support (2) comprises an upper middle ring (21) and a lower middle ring (22), an upper cover body (23) and a lower cover body (24) are arranged on the lower portion of the upper middle ring (21), a groove (25) is concavely carved in the lower cover body (24), clamping pieces (26) are respectively arranged on one sides of the upper cover body (23) and the lower cover body (24), and a probe end (311) of a probe line (31) is arranged in the middle of the clamping pieces (26) to be fixed.
5. The device for testing the thermophysical properties of the powder sample in the low-gravity high-vacuum environment according to claim 4, wherein: the heat conduction test control module (1) is a HotDisk heat conduction instrument or a thermal probe heat conduction instrument.
6. The method for testing the thermophysical properties of the powder sample in the low-gravity high-vacuum environment according to claim 5, wherein the method comprises the following steps:
(1) sample loading: firstly, magnetic powder is added into a lower cover (24) of the sample support (2) and the mass volume of the sample support is controlled, then the probe end (311) is placed above a sample and is fixed by the clamping piece (26), and finally the upper cover body (23) is fixed and the magnetic powder is added into the upper cover body;
(2) a wiring step: firstly, placing the sample support (2) filled with powder at the bottom of a small-gravity vacuum cavity in a vacuum system, then leading the wire end (32) of the probe wire (31) out of the circuit penetration hole (9) on a vacuum flange plate, connecting the wire end with the vacuum aviation plug (6) through soldering, fixing the wire end on the vacuum flange plate, and finally connecting the plug end (321) of the plug wire (32) with the heat conduction test module (1), wherein the wire end section (322) of the plug wire (32) is connected with the other end of the vacuum aviation plug (6);
(3) the testing steps are as follows: the method comprises the steps of firstly opening a vacuum pump, obtaining the vacuum degree in a vacuum cavity through an external vacuum meter, closing a gate valve (10) in the vacuum system when the vacuum degree reaches a preset value, keeping the vacuum in the cavity, then opening a magnetic gravity system (5), adjusting the gravity of an effective magnetic field area, and finally opening a heat conduction test control module (1) for testing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110573325.9A CN113295731A (en) | 2021-05-25 | 2021-05-25 | Powder sample thermophysical property testing device and method under low-gravity high-vacuum environment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110573325.9A CN113295731A (en) | 2021-05-25 | 2021-05-25 | Powder sample thermophysical property testing device and method under low-gravity high-vacuum environment |
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2021
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Application publication date: 20210824 |