Spacing-adjustable heat conduction mechanism and extremely-low-temperature refrigeration equipment

Abstract

The invention relates to the technical field of extremely-low-temperature refrigeration, and provides a spacing-adjustable heat conduction mechanism which comprises at least two layers of cooling plates, and at least three sets of supporting assemblies are connected between every two adjacent cooling plates. The supporting assembly comprises an adjusting rod which is in threaded connection with the supporting rod. The adjusting rods and the supporting rods are fixedly connected with the cooling discs on the corresponding sides respectively. Adjusting holes are formed in the supporting rods, and threaded rods in threaded fit with the adjusting holes are fixedly arranged at the ends, facing the supporting rods, of the adjusting rods; the supporting rod is further sleeved with an anti-loose sleeve. The anti-loose sleeve is configured to move in the axial direction of the supporting rod and form surface contact fit with the adjusting rod, and then static friction force is generated between the anti-loose sleeve and the adjusting rod. Therefore, the total length of the adjusting rod and the supporting rod can be changed through threaded fit of the adjusting rod and the supporting rod, and then the distance between the two cooling discs is adjusted. Adjusting operation is convenient, and adjusting precision is high. The invention further provides the extremely-low-temperature refrigeration equipment which is provided with the distance-adjustable heat conduction mechanism.

Description

Technical Field

[0001] The invention belongs to the technical field of extremely low temperature refrigeration, and in particular relates to a spacing-adjustable heat conduction mechanism and extremely low temperature refrigeration equipment. Background Art

[0002] The main structure of a cryogenic refrigerator is usually composed of multiple cold plates. The cold plates are connected by support rods. Currently, the support rods of refrigerators are usually of fixed length. However, during the installation process or when replacing parts between cold plates, the spacing will change, and the spacing of the cold plates needs to be adjusted to match. However, the fixed length of the support rods makes it difficult to adjust the spacing, and in serious cases, the support rods may even need to be replaced.

[0003] In addition, a thermometer lead heat sink is usually provided on the cold plate of an existing ultra-low temperature refrigerator to improve the temperature measurement accuracy. However, the lead heat sink occupies a part of the space in the cold plate, thereby increasing the cold plate area and thus the cost.

[0004] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the invention

[0005] In view of the above-mentioned defects, the present invention mainly provides a spacing-adjustable heat conduction mechanism to solve the technical problem that the spacing between cold plates cannot be adjusted.

[0006] In order to solve the above problems, the present invention provides a spacing-adjustable heat-conducting mechanism, comprising at least two layers of cold plates, at least three groups of supporting components are connected between two adjacent cold plates;

[0007] The support assembly comprises an adjusting rod, and the adjusting rod is screwed to the supporting rod; the adjusting rod and the supporting rod are respectively fixed to the cold plate on the corresponding side.

[0008] According to the spacing-adjustable heat-conducting mechanism of the present invention, an adjustment hole is provided on the support rod, and a threaded rod screwed with the adjustment hole is fixedly arranged at one end of the adjustment rod toward the support rod; an anti-loosening sleeve is also sleeved on the outside of the support rod; the anti-loosening sleeve is configured to be able to move along the axial direction of the support rod and form a surface contact with the adjustment rod, thereby generating static friction between the anti-loosening sleeve and the adjustment rod.

[0009] According to the spacing-adjustable heat-conducting mechanism of the present invention, a clamping sleeve having a regular polygonal cross-section is fixedly arranged on the outer side surface of the anti-loosening sleeve.

[0010] According to the spacing-adjustable heat-conducting mechanism of the present invention, the anti-loosening sleeve moves along the axial direction of the support rod in a continuous or step-by-step manner.

[0011] According to the spacing-adjustable heat-conducting mechanism of the present invention, the anti-loosening sleeve moves along the axial direction of the support rod in a continuous manner; and the anti-loosening sleeve is threadedly sleeved with the support rod.

[0012] According to the spacing-adjustable heat-conducting mechanism of the present invention, the anti-loosening sleeve moves along the axial direction of the support rod in a step-by-step manner; at least two groups of step components are evenly arranged on the outer surface of the support rod; each group of step components includes multiple layers of stop parts distributed along the axial direction of the support rod; and the inner wall of the anti-loosening sleeve is provided with positioning blocks that are the same in number as the step components and are used to abut and cooperate with the stop parts.

[0013] According to the adjustable spacing heat conduction mechanism of the present invention, each stopper of the step assembly is a grading plate, and each grading plate is arranged in parallel at equal intervals along the axial direction of the support rod; the positioning block of the anti-loosening sleeve is in the shape of a slat, and the thickness is less than the spacing between two adjacent grading plates;

[0014] The step assembly also includes a limit bar fixed on the outer side surface of the support rod and parallel to the axial direction of the support rod; the same end of each grading plate is fixedly connected to the limit bar.

[0015] According to the spacing-adjustable heat-conducting mechanism of the present invention, the stopper of the step assembly is a step block, and each layer of step blocks is fixedly arranged on the outer surface of the support rod in a spiral manner in sequence; the positioning block is arranged to pass through the axis parallel to the anti-loosening sleeve.

[0016] According to the adjustable spacing heat conduction mechanism of the present invention, the support rod and the adjustment rod are both fixedly connected to the fixing seat; the fixing seat is fixedly connected to the cold plate; the fixing seat is threadedly connected to the fastening bolt; the bolt head of the fastening bolt and the fixing seat are respectively arranged on both sides of the cold plate; a gasket is arranged between the bolt head and the cold plate;

[0017] The support rod is also fixedly connected to a heat-conducting column, and the heat-conducting column is fixedly connected to the fixing seat; a lead wire is wound around the heat-conducting column, and the lead wire is also connected to a temperature sensor arranged on the cold plate; two clamping rings that are butt-jointed are also sleeved on the outer wall of the heat-conducting column.

[0018] A very low temperature refrigeration device comprises the above-mentioned heat conduction mechanism with adjustable spacing.

[0019] In summary, the adjustable spacing heat conduction mechanism of the present invention can change the total length of the adjustment rod and the support rod by threaded cooperation between the two, thereby adjusting the spacing between the two cold plates. The adjustment operation is convenient and the adjustment accuracy is high. The present invention also provides a very low temperature refrigeration device having the adjustable spacing heat conduction mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the spacing-adjustable heat-conducting mechanism of the present invention;

[0021] Figure 2 yes Figure 1 Schematic diagram of the exploded structure of the middle support assembly;

[0022] Figure 3 is a structural schematic diagram of an embodiment of a support rod of the present invention;

[0023] Figure 4 is a structural schematic diagram of an embodiment of a support rod of the present invention;

[0024] Figure 5 It is a structural schematic diagram of an embodiment of a release sleeve of the present invention;

[0025] Figure 6 is a structural schematic diagram of an embodiment of a support rod of the present invention;

[0026] Figure 7 It is a structural schematic diagram of an embodiment of a release sleeve of the present invention;

[0027] In the figure: 1-cold plate, 11-temperature sensor, 12-lead; 2-adjusting rod, 21-threaded rod; 3-fixed seat, 31-fastening bolt, 32-gasket; 4-anti-loosening sleeve, 41-clamping sleeve, 42-positioning block; 5-clamping ring, 6-support rod, 61-adjusting hole, 62-heat conducting column, 63-grading plate, 64-limiting strip, 65-step block. DETAILED DESCRIPTION

[0028] See also Figure 1 , the present invention provides a spacing-adjustable heat-conducting mechanism, comprising at least two layers of cold plates 1, at least three groups of supporting components are connected between two adjacent cold plates 1;

[0029] See also Figure 2 The support assembly includes an adjusting rod 2, and the adjusting rod 2 is screwed to a supporting rod 6; the adjusting rod 2 and the supporting rod 6 are respectively fixed to the cold plate 1 on the corresponding side;

[0030] The total length of the adjusting rod 2 and the supporting rod 6 can be changed by threaded cooperation between the two rods, thereby adjusting the distance between the two cold plates 1 .

[0031] As an embodiment, an adjustment hole 61 is opened on the support rod 6, and a threaded rod 21 threadedly engaged with the adjustment hole 61 is fixed to one end of the adjustment rod 2 facing the support rod 6; the total length of the adjustment rod 2 and the support rod 6 can be accurately adjusted through the threaded engagement of the threaded rod 21 and the adjustment hole 61, thereby accurately adjusting the distance between the two cold plates 1.

[0032] Furthermore, in order to fix the adjustment result of the threaded rod 21 and the adjustment hole 61, it is prevented that the two will rotate relative to each other due to external disturbance, thereby changing the adjustment result. Figure 3 The outside of the support rod 6 is also sleeved with an anti-loosening sleeve 4; the anti-loosening sleeve 4 is configured to be able to move along the axial direction of the support rod 6, forming a surface contact with the adjusting rod 2, thereby generating static friction between the anti-loosening sleeve 4 and the adjusting rod 2; thereby preventing the threaded rod 21 and the adjusting hole 61 from rotating relative to each other, and locking the adjustment result.

[0033] As an embodiment, the anti-loosening sleeve 4 moves axially along the support rod 6 in a continuous manner; the anti-loosening sleeve 4 is threadedly sleeved with the support rod 6; after the spacing is adjusted, the anti-loosening sleeve 4 is screwed until it forms a surface contact with the adjustment rod 2.

[0034] Furthermore, a sleeve 41 with a regular polygonal cross-section, such as a regular quadrilateral, a regular pentagon, and a regular hexagon, is fixedly disposed on the outer side of the anti-loosening sleeve 4, so as to facilitate the use of tools to twist the anti-loosening sleeve 4.

[0035] Based on some application scenarios of the heat transfer mechanism of the present invention, the distance adjustment between two adjacent cold plates 1 is discontinuous, and each adjustment amount has specific requirements. During the continuous adjustment process, the operator needs to use a measuring tool to measure, which makes the adjustment process more cumbersome and the adjustment deviation is large.

[0036] To conveniently and accurately adjust the distance between the two cold plates 1, refer to Figure 4 As an embodiment, the anti-loosening sleeve 4 moves along the axial direction of the support rod 6 in a step-by-step manner; at least two groups of step components are evenly arranged on the outer surface of the support rod 6; each group of step components includes multiple layers of stoppers distributed along the axial direction of the support rod 6; combined with Figure 5 The inner wall of the anti-loosening sleeve 4 is provided with positioning blocks 42, the number of which is the same as the number of the step components, for abutting and cooperating with the stopper;

[0037] The anti-loosening sleeve 4 changes its position along the axial direction of the support rod 6 by cooperating with the positioning block 42 of the anti-loosening sleeve 4 and the stopper parts of the step components at different layers.

[0038] The width of the positioning block 42 of the present invention is smaller than the distance between two adjacent step components. During adjustment, the positioning block 42 is located in the gap between the two step components, and the anti-loosening sleeve 4 can move along the axial direction of the support rod 6; the anti-loosening sleeve 4 is rotated to make the positioning block 42 abut against the stopper of the corresponding layer, and the adjustment can be completed.

[0039] When adjusting again, the anti-loosening sleeve 4 is rotated in the reverse direction to make the positioning block 42 disengage from the stopper and enter the gap between the two step components, and then the positioning block 42 can be moved along the axial direction of the support rod 6 again to perform the adjustment operation.

[0040] The distance between two adjacent layers of the stopper of the step assembly can be adaptively set according to the requirements of the actual application scenario. When adjusting the distance between the two cold plates 1, first adjust the position of the anti-loosening sleeve 4 in the axial direction of the support rod 6, then screw the adjustment rod 2 to form a surface contact with the anti-loosening sleeve 4 to complete the adjustment. The operation of adjusting the distance is simplified, and the adjustment result is precisely controllable.

[0041] As an embodiment, each stopper of the step assembly is a grading plate 63, and each grading plate 63 is arranged in parallel at equal intervals along the axial direction of the support rod 6; the positioning block 42 of the anti-loosening sleeve 4 is in the shape of a slat, and the thickness is less than the distance between two adjacent layers of grading plates 63;

[0042] During adjustment, the aforementioned adjustment steps are followed to move the positioning block 42 above the predetermined layer of the grading plate 63. After the adjustment rod 2 is tightened, the positioning block 42 and the grading plate 63 form a surface contact fit to lock the adjustment amount.

[0043] Furthermore, the step assembly further includes a limit bar 64 fixed on the outer side of the support rod 6 and parallel to the axial direction of the support rod 6; the same end of each grading plate 63 is fixedly connected to the limit bar 64;

[0044] During adjustment, the anti-loosening sleeve 4 is rotated to allow the positioning block 42 to enter above the grading plate 63 of the predetermined layer; when the grading plate 63 touches the limiting strip 64, the operation of locking the adjustment amount is completed.

[0045] When adjusting again, the anti-loosening sleeve 4 is rotated in the opposite direction. When the positioning block 42 touches another set of limiting strips 64, the positioning block 42 is completely separated from the grading plate 63, and the anti-loosening sleeve 4 can move along the axial direction of the support rod 6.

[0046] See also Figure 6 and Figure 7 As an embodiment, the stopper of the step assembly is a step block 65, and each layer of step blocks 65 is fixedly arranged on the outer surface of the support rod 6 in a spiral manner;

[0047] During adjustment, the aforementioned adjustment steps are followed to move the anti-loosening sleeve 4 along the axial direction of the support rod 6. After reaching the position of the step block 65 of the predetermined layer, the anti-loosening sleeve 4 is rotated to move the positioning block 42 above the step block 65 of the layer. After the adjustment rod 2 is tightened, the positioning block 42 forms a surface contact fit with the step block 65 to lock the adjustment amount.

[0048] When adjusting again, the anti-loosening sleeve 4 is rotated in the reverse direction to disengage the positioning block 42 from the step block 65, and then the above-mentioned operation is performed.

[0049] Furthermore, the positioning block 42 is arranged to penetrate the axial direction of the anti-loosening sleeve 4 in parallel, so as to prevent the positioning block 42 from entering under another group of step blocks 65 when the anti-loosening sleeve 4 rotates in the reverse direction, thereby affecting the adjustment operation.

[0050] As an embodiment, the support rod 6 and the adjustment rod 2 are both fixedly connected to the fixing seat 3; the fixing seat 3 is fixedly connected to the cold plate 1; the fixing seat 3 of the present invention is made of a metal material with high thermal conductivity, such as copper, silver or aluminum.

[0051] The good heat conduction performance of the fixing base 3 can play the role of a heat sink, so that there is no need to set a dedicated heat sink structure on the cold plate 1, thus saving the space of the cold plate 1.

[0052] Preferably, the fixing seat 3 is screwed with a fastening bolt 31; the bolt head of the fastening bolt 31 and the fixing seat 3 are respectively arranged on both sides of the cold plate 1; the fixing seat 3 is fixed on the cold plate 1 for easy disassembly and installation. Further, a gasket 32 ​​is arranged between the bolt head and the cold plate 1.

[0053] As an embodiment, the support rod 6 is also fixedly connected to a heat-conducting column 62, and the heat-conducting column 62 is fixedly connected to the fixing seat 3; a lead wire 12 is wound around the heat-conducting column 62, and the lead wire 12 is also connected to a temperature sensor 11 arranged on the cold plate 1; the heat generated by the lead wire 12 is conducted away by the heat-conducting column 62, so that the temperature detection is more accurate. At the same time, the layout of the lead wire 12 on the cold plate 1 is reduced, and the effective use area of ​​the cold plate 1 is released.

[0054] Furthermore, two mutually butted clamping rings 5 ​​are sleeved on the outer wall of the heat-conducting column 62; the two clamping rings 5 ​​make the lead 12 close to the heat-conducting column 62 to ensure the heat conduction efficiency. Optionally, the two clamping rings 5 ​​of the present invention are connected by bolts.

[0055] The present invention also provides a very low temperature refrigeration device having the above-mentioned adjustable-distance heat conduction mechanism.

[0056] In summary, the present invention provides a heat conduction mechanism with adjustable spacing, and the total length of the adjusting rod and the supporting rod can be changed by threaded cooperation between the two, thereby adjusting the spacing between the two cold plates. The adjustment operation is convenient and the adjustment accuracy is high. The present invention also provides a very low temperature refrigeration device, which has the above-mentioned heat conduction mechanism with adjustable spacing.

[0057] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A spacing-adjustable heat-conducting mechanism, characterized in that: It comprises at least two layers of cold plates, and at least three groups of supporting components are connected between two adjacent cold plates; The support assembly comprises an adjusting rod, and the adjusting rod is screwed to the supporting rod; the adjusting rod and the supporting rod are respectively fixed to the cold plate on the corresponding side.

2. The adjustable spacing heat conducting mechanism according to claim 1, characterized in that: An adjustment hole is provided on the support rod, and a threaded rod is fixedly arranged at one end of the adjustment rod toward the support rod and is threadedly engaged with the adjustment hole; an anti-loosening sleeve is also sleeved on the outside of the support rod; the anti-loosening sleeve is configured to be able to move along the axial direction of the support rod and form a surface contact with the adjustment rod, thereby generating static friction between the anti-loosening sleeve and the adjustment rod.

3. The adjustable spacing heat conducting mechanism according to claim 2, characterized in that: A clamping sleeve with a regular polygonal cross-section is fixedly arranged on the outer side of the anti-loosening sleeve.

4. The adjustable spacing heat conducting mechanism according to claim 2, characterized in that: The anti-loosening sleeve moves along the axial direction of the support rod in a continuous or step-by-step manner.

5. The adjustable spacing heat conducting mechanism according to claim 4, characterized in that: The anti-loosening sleeve moves in a continuous manner along the axial direction of the support rod; the anti-loosening sleeve is threadedly sleeved with the support rod.

6. The adjustable spacing heat conducting mechanism according to claim 4, characterized in that: The anti-loosening sleeve moves axially along the support rod in a step-by-step manner; at least two groups of step components are evenly arranged on the outer surface of the support rod; each group of step components includes multiple layers of stop parts distributed axially along the support rod; and the inner wall of the anti-loosening sleeve is provided with positioning blocks that are the same in number as the step components and are used to abut and cooperate with the stop parts.

7. The adjustable spacing heat conducting mechanism according to claim 6, characterized in that: Each stopper of the step assembly is a grading plate, and each grading plate is arranged in parallel at equal intervals along the axial direction of the support rod; the positioning block of the anti-loosening sleeve is in the shape of a slat, and the thickness is less than the distance between two adjacent grading plates; The step assembly also includes a limit bar fixed on the outer side surface of the support rod and parallel to the axial direction of the support rod; the same end of each grading plate is fixedly connected to the limit bar.

8. The adjustable spacing heat conducting mechanism according to claim 6, characterized in that: The stopper of the step assembly is a step block, and each layer of the step blocks is fixedly arranged on the outer surface of the support rod in a spiral manner in sequence; the positioning block is arranged to pass through the axial direction of the anti-loosening sleeve in parallel.

9. The adjustable spacing heat conducting mechanism according to claim 2, characterized in that: The support rod and the adjustment rod are both fixedly connected to the fixing seat; the fixing seat is fixedly connected to the cold plate; the fixing seat is threadedly connected to the fastening bolt; the bolt head of the fastening bolt and the fixing seat are respectively arranged on both sides of the cold plate; a gasket is arranged between the bolt head and the cold plate; The support rod is also fixedly connected to a heat-conducting column, and the heat-conducting column is fixedly connected to the fixing seat; a lead wire is wound around the heat-conducting column, and the lead wire is also connected to a temperature sensor arranged on the cold plate; two clamping rings that are butt-jointed are also sleeved on the outer wall of the heat-conducting column.

10. A very low temperature refrigeration device, characterized in that: The invention has a spacing-adjustable heat-conducting mechanism as claimed in any one of claims 1 to 9.

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