CN114486980A - Thermal switching device and low-temperature test equipment - Google Patents
Thermal switching device and low-temperature test equipment Download PDFInfo
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- CN114486980A CN114486980A CN202011147201.6A CN202011147201A CN114486980A CN 114486980 A CN114486980 A CN 114486980A CN 202011147201 A CN202011147201 A CN 202011147201A CN 114486980 A CN114486980 A CN 114486980A
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- 238000012360 testing method Methods 0.000 title claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 50
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- 230000000670 limiting effect Effects 0.000 claims description 51
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- 229910052751 metal Inorganic materials 0.000 claims description 16
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- 239000010931 gold Substances 0.000 claims description 4
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- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
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- 229910002804 graphite Inorganic materials 0.000 description 1
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Abstract
The invention relates to the technical field of thermal switches, in particular to a thermal switch device and low-temperature test equipment. The thermal switch device comprises an adjusting mechanism, a clamping mechanism and a radiation shield, wherein the clamping mechanism comprises two positioning plates, two first connecting plates, two second connecting plates, two clamping parts and a fixing part, the fixing part is respectively and rotatably connected with the upper ends of the two first connecting plates through a first rotating shaft, the lower ends of the two first connecting plates are respectively and rotatably connected with the upper ends of the two second connecting plates through second rotating shafts, the two second connecting plates are rotatably connected with each other through third rotating shafts in an intercrossing manner, the lower ends of the two second connecting plates are respectively and fixedly connected with the two clamping parts, the upper ends of the two positioning plates are respectively and fixedly connected with an upper top plate of the radiation shield, and the lower ends of the two positioning plates are respectively and fixedly connected with the two ends of the third rotating shafts. The invention is suitable for the cooling control of the suspended sample, and has simple structure and convenient operation.
Description
Technical Field
The invention relates to the technical field of thermal switches, in particular to a thermal switch device and low-temperature test equipment.
Background
Currently, in the low temperature test equipment, a thermal switch plays a key role, in the low temperature test process, a sample is firstly taken to obtain the temperature of a liquid pool, and then the heat insulation is carried out, and the process needs to be realized through the thermal switch. Thermal switches are also used to control the thermal connection between different stages in operations such as cryogenic adiabatic demagnetization. The types of thermal switches used in different temperature zones are also different. According to different thermal switch principles and structures, the thermal switch can be divided into a mechanical contact type thermal switch, a gas thermal switch, a superconducting thermal switch, a graphite thermal switch and other thermal switches.
Mechanical contact is the simplest type of thermal switch in principle, widely used in laboratories and in practical devices, where the switching of the thermal switch state is achieved by contact or disconnection of a movable surface. The main advantage of mechanical thermal switches is that the thermal contact can be completely broken when opened, and is therefore often used in thermal measurements. The conventional mechanical contact type thermal switch is a flat plate, and the sample is contacted with a plane with the temperature of a liquid pool by external pressure or the dead weight of the sample, and is separated after the sample is cooled.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art.
Therefore, the invention provides a thermal switch device which can solve the problem that the existing mechanical thermal switch cannot be applied to hanging samples.
The invention also provides low-temperature test equipment.
According to the thermal switch device of the embodiment of the first aspect of the invention, the thermal switch device comprises an adjusting mechanism, a clamping mechanism and a radiation shield, wherein the clamping mechanism is arranged inside the radiation shield; the radiation shield comprises a radiation shield body and an upper top plate arranged at an opening at the upper end of the radiation shield body; the adjusting mechanism comprises a lifting rod, the upper top plate is provided with a first through hole for the lifting rod to pass through, and the lower end of the lifting rod passes through the first through hole and is connected with the clamping mechanism;
fixture includes two locating plates, two first connecting plates, two second connecting plates, two clamping parts and a fixed part, the fixed part with the lower extreme of lifter is fixed continuous, the fixed part respectively with two through first axis of rotation the upper end of first connecting plate is rotated and is connected, two the lower extreme of first connecting plate respectively through second axis of rotation and two the upper end of second connecting plate corresponds to rotate and is connected, two through third axis of rotation intercrossing rotation between the second connecting plate is connected, two the lower extreme of second connecting plate respectively with two the clamping part corresponds fixed connection, two the upper end of locating plate respectively with go up top plate fixed connection, two the lower extreme of locating plate respectively with the both ends of third axis of rotation correspond fixed connection.
According to an embodiment of the invention, the adjusting mechanism further comprises a driving mechanism for driving the lifting rod to perform lifting movement.
According to one embodiment of the invention, the radiation shield is externally provided with a vacuum shield comprising a vacuum shield upper flange arranged above the upper top plate;
the driving mechanism comprises an adjusting rod, a fixed disc and an adjusting disc, a second through hole for the adjusting rod to pass through is formed in the upper flange of the vacuum cover, the fixed disc is arranged outside the vacuum cover, and the adjusting disc is arranged inside the vacuum cover; the fixed disk is fixedly arranged above the flange on the vacuum cover, the lower end of the adjusting rod is fixedly connected with the adjusting disk, the upper end of the adjusting rod penetrates through the second through hole to be in threaded connection with the fixed disk, and the upper end of the lifting rod is rotatably connected with the adjusting disk.
According to one embodiment of the invention, a shielding cover is fixedly arranged between the radiation shielding cover and the vacuum cover, the shielding cover comprises an upper shielding cover flange, the upper shielding cover flange is positioned between the upper vacuum cover flange and the upper top plate, and the upper shielding cover flange is provided with a third through hole for the lifting rod to pass through;
the adjusting mechanism further comprises a limiting mechanism, the limiting mechanism comprises a limiting block, the limiting block is fixedly arranged at a position, corresponding to the flange on the shielding cover, on the lifting rod, and the flange on the shielding cover is provided with a limiting groove for limiting the limiting block to move up and down.
According to one embodiment of the invention, the adjusting disc comprises an adjusting disc body, the adjusting disc body is provided with a through hole, the through hole penetrates through the end faces of the upper end and the lower end of the adjusting disc body, and the inner side wall of the through hole is provided with a circle of limiting bosses; the lower end of the adjusting rod is a hollow cylindrical barrel, the lower end of the adjusting rod extends into the through hole, and the lower end of the adjusting rod is fixedly connected with the upper surface of the limiting boss, so that a limiting cavity is formed by enclosing the adjusting rod and the limiting boss; the upper end of lifter is equipped with spacing cylinder, spacing cylinder set up in the inside of spacing cavity, just the diameter of spacing cylinder is greater than the internal diameter of spacing boss, being greater than of spacing boss the external diameter of lifter.
According to one embodiment of the invention, the fixed disk is mounted above the upper flange of the vacuum cover through a fixed seat, the fixed seat comprises a fixed seat body, the fixed seat body is fixedly mounted on the upper surface of the upper flange of the vacuum cover, and the fixed seat body is provided with a fourth through hole correspondingly connected with the second through hole; a plurality of support rods are connected between the upper surface of the fixed seat body and the lower surface of the fixed disk, and the support rods are arranged around the periphery of the adjusting rod.
According to one embodiment of the invention, the flange on the vacuum cover is respectively provided with a vacuum pump interface and a vacuum meter interface, and the vacuum pump interface and the vacuum meter interface are respectively communicated with the inner cavity of the vacuum cover.
According to an embodiment of the invention, the metal top plate further comprises two metal braided belts, the upper ends of the two metal braided belts are respectively connected with the upper top plate, and the lower ends of the two metal braided belts are respectively correspondingly connected with the two clamping parts.
According to an embodiment of the invention, the outer surface of the clamping portion is provided with a gold plating.
The low temperature test equipment according to the second aspect of the embodiment of the invention comprises the thermal switch device of the above embodiment.
One or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:
the thermal switch device comprises an adjusting mechanism, a clamping mechanism and a radiation shield, wherein the interior of the radiation shield is used for hanging a sample, the clamping mechanism is arranged in the radiation shield, the adjusting mechanism comprises a lifting rod, the lower end of the lifting rod penetrates through the radiation shield to be connected with the clamping mechanism, the clamping mechanism comprises two positioning plates, two first connecting plates, two second connecting plates, two clamping parts and a fixing part, the fixing part is fixedly connected with the lower end of the lifting rod, the fixing part is respectively and rotatably connected with the upper ends of the two first connecting plates through a first rotating shaft, the lower ends of the two first connecting plates are respectively and rotatably connected with the upper ends of the two second connecting plates through a second rotating shaft, the two second connecting plates are mutually crossed and rotatably connected through a third rotating shaft, and the lower ends of the two second connecting plates are respectively and fixedly connected with the two clamping parts, the upper ends of the two positioning plates are respectively and fixedly connected with the upper top plate, and the lower ends of the two positioning plates are respectively and correspondingly and fixedly connected with the two ends of the third rotating shaft, so that the clamping action of the clamping mechanism is controlled by driving the lifting rod to move up and down; when the lifting rod moves upwards, the fixed part drives the included angle between the two first connecting plates to be reduced, so that the distance between the lower ends of the second connecting plates is reduced, the distance between the two clamping parts is reduced, the suspended sample can be clamped through the two clamping parts, the cold energy of the radiation screen cover is transmitted to the suspended sample through the clamping parts, and the suspended sample is cooled quickly; after the suspended sample is cooled, the lifting rod is moved downwards, so that the two clamping parts are separated from the suspended sample. Therefore, the thermal switch device provided by the embodiment of the invention is suitable for cooling control of a suspended sample, and has the advantages of simple structure, small volume, light weight and convenience in operation.
The low-temperature test equipment provided by the embodiment of the invention comprises the thermal switch device provided by the embodiment. Because the low-temperature test equipment is provided with the thermal switch device of the embodiment, the low-temperature test equipment has all the advantages of the thermal switch device, and the service performance of the low-temperature test equipment is further improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic diagram of a thermal switching apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic view of the structure of the clamping mechanism in the embodiment of the invention;
fig. 3 is a schematic structural diagram of an adjusting disk in the embodiment of the invention.
Reference numerals:
1: suspending the sample; 2: an upper top plate; 3: a lifting rod; 31: a limiting cylinder; 4: positioning a plate; 5: a first connecting plate; 6: a second connecting plate; 7: a clamping portion; 8: a fixed part; 9: a flange is arranged on the vacuum cover; 91: a vacuum pump interface; 92: a vacuum gauge interface; 10: adjusting a rod; 11: fixing the disc; 12: an adjusting disk; 121: a regulating disk body; 122: perforating; 123: a limiting boss; 124: a limiting chamber; 13: an upper flange of the shield case; 14: a limiting block; 15: a fixed seat; 151: a fixed seat body; 152: a support bar; 16: a metal braid; 17: a clamping mechanism.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
As shown in fig. 1 to 3, an embodiment of the present invention provides a thermal switch apparatus, which includes an adjusting mechanism, a holding mechanism 17, and a radiation shield, wherein the interior of the radiation shield is used for placing a suspended sample 1, and the holding mechanism 17 is disposed in the interior of the radiation shield. The radiation shield includes a radiation shield body (not shown) and an upper top plate 2 disposed at an opening at an upper end of the radiation shield body. The adjusting mechanism comprises a lifting rod 3, and the upper top plate 2 is provided with a first through hole for the lifting rod 3 to pass through so that the lower end of the lifting rod 3 can be connected with the clamping mechanism 17 through the first through hole. That is, the lift pins 3 can move up and down with respect to the upper ceiling 2 of the radiation shield.
Wherein, fixture 17 adopts the metal to make, fixture 17 includes two locating plates 4, two first connecting plates 5, two second connecting plates 6, two clamping parts 7 and a fixed part 8, fixed part 8 is fixed with the lower extreme of lifter 3 and links to each other, fixed part 8 rotates with the upper end of two first connecting plates 5 respectively through first axis of rotation and is connected, the lower extreme of two first connecting plates 5 corresponds the rotation through the second axis of rotation and the upper end of two second connecting plates 6 respectively and is connected, rotate through the intercrossing of third axis of rotation and connect between two second connecting plates 6, the lower extreme of two second connecting plates 6 corresponds fixed connection with two clamping parts 7 respectively, the upper end of two locating plates 4 respectively with last top plate 2 fixed connection, the lower extreme of two locating plates 4 corresponds fixed connection with the both ends of third axis of rotation respectively. Wherein, can restrict the rigidity of third axis of rotation unchangeably through two locating plates 4, can the rotation each other between two first connecting plates 5, can the rotation each other between two second connecting plates 6, two clamping part 7 are located the left and right sides that hangs sample 1. That is, the vertical movement of the elevating rod 3 is driven to control the holding operation of the holding mechanism 17 for the suspended sample 1.
When the lifting rod 3 moves upwards, the two first connecting plates 5 are driven to move through the fixing portion 8, so that the included angle between the two first connecting plates 5 is reduced, the two first connecting plates 5 can drive the two second connecting plates 6 to move along with the two first connecting plates, the lower end distance of the second connecting plates 6 is reduced, the distance between the two clamping portions 7 is driven to be reduced through the two second connecting plates 6, and then the suspended sample 1 can be clamped through the two clamping portions 7. Conversely, when the lifting rod 3 moves downwards, the two clamping parts 7 are separated from the suspended sample 1.
Because fixture 17 adopts the metal to make to fixture 17 is through two locating plates 4 and the last roof 2 lug connection of radiation screen cover, consequently when the radiation screen cover is in the low temperature state, carries out the centre gripping contact with two clamping parts 7 with hanging sample 1, then the cold volume of radiation screen cover can be transmitted to hanging sample 1 through two clamping parts 7 rapidly, thereby carries out rapid cooling to hanging sample 1. After the suspended sample 1 is cooled, the two clamping parts 7 are controlled to be separated from the suspended sample 1, and the transmission state of the cold energy from the radiation shield to the suspended sample 1 can be interrupted.
Therefore, the thermal switch device provided by the embodiment of the invention is suitable for cooling control of the suspended sample 1, and has the advantages of simple structure, small volume, light weight and convenience in operation.
Specifically, a vacuum cover is arranged outside the radiation shield, the vacuum cover comprises a vacuum cover body (not shown) arranged outside the radiation shield body and a vacuum cover upper flange 9 arranged above the upper top plate 2, and the vacuum cover upper flange 9 is arranged at an opening at the upper end of the vacuum cover body. A vacuum environment can be provided for low-temperature testing through the vacuum cover.
In a further embodiment of the invention, the adjustment mechanism further comprises a drive mechanism for driving the lifting rod 3 in a lifting movement.
In a specific embodiment, the driving mechanism comprises an adjusting rod 10, a fixed disk 11 and an adjusting disk 12, and the vacuum hood upper flange 9 is provided with a second through hole for the adjusting rod 10 to pass through so that the adjusting rod 10 can move up and down and rotate relatively to the vacuum hood upper flange 9.
Wherein the fixed disk 11 is arranged outside the vacuum housing, and the adjusting disk 12 is arranged inside the vacuum housing. The fixed disc 11 is fixedly arranged above the upper flange 9 of the vacuum cover, the lower end of the adjusting rod 10 is fixedly connected with the adjusting disc 12, the upper end of the adjusting rod 10 penetrates through the second through hole to be in threaded connection with the fixed disc 11, and the upper end of the lifting rod 3 is rotatably connected with the adjusting disc 12. That is, the adjusting rod 10 is rotated outside the vacuum hood, so that the up-and-down movement of the adjusting rod 10 is realized through the thread matching mode between the adjusting rod 10 and the fixed disk 11, the up-and-down movement of the adjusting rod 10 can drive the lifting rod 3 to move up and down, and the clamping mechanism 17 is controlled to clamp or separate the suspended sample 1.
Specifically, a shielding cover is fixedly arranged between the radiation shield and the vacuum cover, the shielding cover comprises a shielding cover body (not shown) arranged outside the vacuum cover body and a shielding cover upper flange 13 arranged at an opening at the upper end of the shielding cover body, the shielding cover upper flange 13 is positioned between the vacuum cover upper flange 9 and the upper top plate 2, and the shielding cover upper flange 13 is provided with a third through hole for the lifting rod 3 to pass through. That is, the lift lever 3 can move up and down with respect to the shield upper flange 13.
Further, the adjusting mechanism further comprises a limiting mechanism, the limiting mechanism comprises a limiting block 14, the limiting block 14 is fixedly arranged on the lifting rod 3 at a position corresponding to the upper flange 13 of the shield cover, and the upper flange 13 of the shield cover is provided with a limiting groove (not shown) for limiting the limiting block 14 to move up and down. That is, the lifting rod 3 can only move up and down relative to the shield upper flange 13 but cannot rotate relative to the shield upper flange 13 by the matching mode between the limiting block 14 and the limiting groove.
Accordingly, when the adjustment lever 10 is rotated, the adjustment dial 12 can be driven to rotate synchronously. Due to the rotation matching mode between the adjusting disc 12 and the lifting rod 3 and the limiting effect between the limiting block 14 and the limiting groove, when the adjusting rod 10 rotates, the lifting rod 3 cannot rotate but only moves up and down, and then the clamping action of the clamping mechanism 17 is controlled by the up-and-down movement of the lifting rod 3.
It should be understood that the structural form of the driving mechanism is not limited to the above type, and an air cylinder, an oil cylinder, a linear motor or an electro-hydraulic push rod and the like can be adopted according to the actual use requirement, and the lifting rod 3 can be directly driven to perform lifting movement through the power output end of the driving mechanism.
In some embodiments of the present invention, the adjusting disk 12 includes an adjusting disk body 121, the adjusting disk body 121 is provided with a through hole 122, the through hole 122 penetrates through end surfaces of upper and lower ends of the adjusting disk body 121, and an inner side wall of the through hole 122 is provided with a ring of limiting bosses 123. The lower end of the adjusting rod 10 is a hollow cylindrical body, the lower end of the adjusting rod 10 extends into the through hole 122, and the lower end of the adjusting rod 10 is fixedly connected with the upper surface of the limiting boss 123, so that the limiting chamber 124 is formed between the adjusting rod 10 and the limiting boss 123. The upper end of the lifting rod 3 is provided with a limiting cylinder 31, the limiting cylinder 31 is arranged inside the limiting chamber 124, the diameter of the limiting cylinder 31 is larger than the inner diameter of the limiting boss 123, and the diameter of the limiting boss 123 is larger than the outer diameter of the lifting rod 3. That is, the limit cylinder 31 of the lifting rod 3 is rotatably engaged with the through hole 122 of the adjustment disk 12. When adjusting disk 12 rotates and reciprocates along with adjusting rod 10, lifter 3 can reciprocate along with adjusting disk 12 under the effect of spacing cylinder 31 in step, but lifter 3 can not rotate along with adjusting disk 12 in step under stop gear's limiting displacement for lifter 3 can not exert the rotation effort to fixture 17, and then has ensured fixture 17's job stabilization nature and reliability.
In some embodiments of the present invention, the mounting plate 11 is mounted above the vacuum housing upper flange 9 by means of a mounting bracket 15. Wherein, fixing base 15 includes fixing base body 151, and fixing base body 151 fixed mounting is in the upper surface of vacuum hood upper flange 9, and fixing base body 151 is equipped with the fourth through-hole that corresponds with the second through-hole and is connected, is convenient for adjust pole 10 and rotates and reciprocate. A plurality of support rods 152 are connected between the upper surface of the fixing base body 151 and the lower surface of the fixing plate 11, and the plurality of support rods 152 are disposed around the adjusting rod 10. Through setting up fixing base body 151 and a plurality of bracing piece 152, can realize that fixed disk 11 is fixed in the stable, reliable installation of vacuum hood upper flange 9 top.
In some embodiments of the present invention, the thermal switch device further includes two metal braids 16, upper ends of the two metal braids 16 are respectively connected to the upper top plate 2, and lower ends of the two metal braids 16 are respectively connected to the two clamping portions 7. Through setting up two metal braid over braid 16, can make the cold volume of roof 2 directly transmit to two clamping parts 7 through two metal braid over braid 16, the sample 1 is hung in two clamping parts 7 transmission of rethread, has further improved cold volume transfer rate.
Specifically, in order to ensure the cold energy transmission performance of the metal braided strap 16, the metal braided strap 16 may be made of copper.
Specifically, a gold plating layer may be provided on each outer surface of the clamping portions 7. The gold plating layer is arranged on the outer surface of the clamping part 7, so that the thermal contact performance can be improved, the intermetallic contact thermal resistance is slowly increased along with the reduction of the temperature, and the device is suitable for a low-temperature environment, so that the cold quantity transfer rate is further improved.
In some embodiments of the present invention, the upper flange 9 of the vacuum housing is further provided with a vacuum pump port 91 and a vacuum gauge port 92, and the vacuum pump port 91 and the vacuum gauge port 92 are respectively communicated with the inner cavity of the vacuum housing. Wherein the vacuum pump interface 91 is used for connecting with a vacuum pump, and the vacuum gauge interface 92 is used for connecting with a vacuum gauge. The vacuum pump can be used for vacuumizing the inside of the vacuum cover, so that a vacuum environment is provided for low-temperature testing, and the vacuum degree data inside the vacuum cover can be detected and acquired through the vacuum gauge.
The embodiment of the invention also provides low-temperature test equipment which comprises the thermal switch device of the embodiment. Because this low temperature test equipment is provided with the thermal switch device of above-mentioned embodiment for this low temperature test equipment has above-mentioned thermal switch device's whole advantages, when carrying out the low temperature test through this low temperature test equipment, can effectively shorten test cycle, and then improved this low temperature test equipment's performance.
The above embodiments are merely illustrative of the present invention and are not to be construed as limiting the invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and the technical solution of the present invention is covered by the claims of the present invention.
Claims (10)
1. A thermal switching apparatus, characterized in that: the radiation screen cover comprises an adjusting mechanism, a clamping mechanism and a radiation screen cover, wherein the clamping mechanism is arranged inside the radiation screen cover; the radiation shield comprises a radiation shield body and an upper top plate arranged at an opening at the upper end of the radiation shield body; the adjusting mechanism comprises a lifting rod, the upper top plate is provided with a first through hole for the lifting rod to pass through, and the lower end of the lifting rod passes through the first through hole and is connected with the clamping mechanism;
fixture includes two locating plates, two first connecting plates, two second connecting plates, two clamping parts and a fixed part, the fixed part with the lower extreme of lifter is fixed continuous, the fixed part respectively with two through first axis of rotation the upper end of first connecting plate is rotated and is connected, two the lower extreme of first connecting plate respectively through second axis of rotation and two the upper end of second connecting plate corresponds to rotate and is connected, two through third axis of rotation intercrossing rotation between the second connecting plate is connected, two the lower extreme of second connecting plate respectively with two the clamping part corresponds fixed connection, two the upper end of locating plate respectively with go up top plate fixed connection, two the lower extreme of locating plate respectively with the both ends of third axis of rotation correspond fixed connection.
2. The thermal switch device of claim 1, wherein: the adjusting mechanism further comprises a driving mechanism for driving the lifting rod to move up and down.
3. The thermal switch device of claim 2, wherein: a vacuum cover is arranged outside the radiation shield cover and comprises a vacuum cover upper flange arranged above the upper top plate;
the driving mechanism comprises an adjusting rod, a fixed disc and an adjusting disc, a second through hole for the adjusting rod to pass through is formed in the upper flange of the vacuum cover, the fixed disc is arranged outside the vacuum cover, and the adjusting disc is arranged inside the vacuum cover; the fixed disk is fixedly arranged above the flange on the vacuum cover, the lower end of the adjusting rod is fixedly connected with the adjusting disk, the upper end of the adjusting rod penetrates through the second through hole to be in threaded connection with the fixed disk, and the upper end of the lifting rod is rotatably connected with the adjusting disk.
4. The thermal switch device of claim 3, wherein: a shielding cover is fixedly arranged between the radiation shield cover and the vacuum cover and comprises an upper shielding cover flange, the upper shielding cover flange is positioned between the upper vacuum cover flange and the upper top plate, and the upper shielding cover flange is provided with a third through hole for the lifting rod to pass through;
the adjusting mechanism further comprises a limiting mechanism, the limiting mechanism comprises a limiting block, the limiting block is fixedly arranged at a position, corresponding to the flange on the shielding cover, on the lifting rod, and the flange on the shielding cover is provided with a limiting groove for limiting the limiting block to move up and down.
5. The thermal switch device of claim 3, wherein: the adjusting disc comprises an adjusting disc body, the adjusting disc body is provided with a through hole, the through hole penetrates through the end faces of the upper end and the lower end of the adjusting disc body, and the inner side wall of the through hole is provided with a circle of limiting bosses; the lower end of the adjusting rod is a hollow cylindrical barrel, the lower end of the adjusting rod extends into the through hole, and the lower end of the adjusting rod is fixedly connected with the upper surface of the limiting boss, so that a limiting cavity is formed by enclosing the adjusting rod and the limiting boss; the upper end of lifter is equipped with spacing cylinder, spacing cylinder set up in the inside of spacing cavity, just the diameter of spacing cylinder is greater than the internal diameter of spacing boss, being greater than of spacing boss the external diameter of lifter.
6. The thermal switch device of claim 3, wherein: the fixed disk is arranged above the upper flange of the vacuum cover through a fixed seat, the fixed seat comprises a fixed seat body, the fixed seat body is fixedly arranged on the upper surface of the upper flange of the vacuum cover, and the fixed seat body is provided with a fourth through hole correspondingly connected with the second through hole; a plurality of support rods are connected between the upper surface of the fixed seat body and the lower surface of the fixed disk, and the support rods are arranged around the periphery of the adjusting rod.
7. The thermal switch device of claim 3, wherein: the vacuum cover is characterized in that a vacuum pump interface and a vacuum gauge interface are respectively arranged on the upper flange of the vacuum cover and are respectively communicated with the inner cavity of the vacuum cover.
8. The thermal switch device according to any one of claims 1 to 7, wherein: the upper end of each metal woven belt is connected with the upper top plate, and the lower end of each metal woven belt is correspondingly connected with the two clamping parts.
9. The thermal switch device according to any one of claims 1 to 7, wherein: and a gold plating layer is arranged on the outer surface of the clamping part.
10. A cryogenic test apparatus, characterized by: comprising a thermal switching device according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN114909818A (en) * | 2022-07-18 | 2022-08-16 | 南方科技大学 | Tin separating and combining device for nuclear heat insulation demagnetization refrigeration system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114909818A (en) * | 2022-07-18 | 2022-08-16 | 南方科技大学 | Tin separating and combining device for nuclear heat insulation demagnetization refrigeration system |
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