CN202317426U - Explosive welding compound material low temperature refrigerator cold head - Google Patents
Explosive welding compound material low temperature refrigerator cold head Download PDFInfo
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- CN202317426U CN202317426U CN2011204601659U CN201120460165U CN202317426U CN 202317426 U CN202317426 U CN 202317426U CN 2011204601659 U CN2011204601659 U CN 2011204601659U CN 201120460165 U CN201120460165 U CN 201120460165U CN 202317426 U CN202317426 U CN 202317426U
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Abstract
The utility model discloses an explosive welding compound material low temperature refrigerator cold head, which is formed by welding an explosive welding compound material cold cylinder plug and a thin-wall stainless steel cold cylinder. The explosive welding compound material cold cylinder plug is formed by a high heat conduction cold head heat exchanger and a stainless steel transition connection part explosive welding compound material, and a thin-wall stainless steel cold cylinder is integrally welded with a transition connection part. The welding portions of the cold cylinder plug and the cold cylinder are stainless steel. The explosive welding compound material low temperature refrigerator cold head is in welding connection and simple in structure.
Description
Technical field
The utility model belongs to the refrigeration machine of refrigeration technology field, particularly a kind of explosive welding (EW) composite Cryo Refrigerator cold head.
Background technology
Along with development of modern science and technology such as space technology, infrared technique, atomic energy technology, superconductor technology and low-temperature electronics, low-temperature physics, cryogenic medicine and cryobiology, the cryogenic refrigeration machine technology has obtained developing rapidly.Can say so, not have reliable small-sized Cryo Refrigerator, just not have current flourishing space technology, also not have the information revolution and the information industry of making rapid progress.Along with development of times and progress, small-sized Cryo Refrigerator plays an important role in increasing high-tech area.
Cold head is the key component of various Cryo Refrigerators, and cold head is made up of cooling cylinder and cooling cylinder plug usually.The cooling cylinder plug is the parts of refrigeration machine and thermal force positive energy exchange, effectively passes to thermal force in order to spend the cold that makes than big cost, and the material of cooling cylinder plug is selected the higher metal materials of thermal conductivity such as oxygen-free copper usually.Because the Cryo Refrigerator cooling cylinder two ends temperature difference is bigger, and in order to reduce the conductive heat loss in refrigeration machine cold junction and hot junction, the cooling cylinder of Cryo Refrigerator is generally thin-wall stainless steel structure (wall thickness is less than 1mm, and the refrigeration machine cooling cylinder wall thickness that has is less than 0.2mm).Owing to be the welding between the foreign material, distortion has strict demand (axiality is more than 6 grades) to the thin-walled cooling cylinder to postwelding, and refrigeration machine has strict demand to the postwelding leak rate (require 3MPa usually, leak rate is lower than 1 * 10 in addition
-9Pam
3S
-1), make that the welding difficulty of cooling cylinder and cold head is bigger, become a technology bottleneck of refrigeration machine through engineering approaches.As Chinese patent (patent No.: 200710041611.0), cold head adopts the red copper material, adopts silver soldering with the welding of cooling cylinder because stainless fusing point and silver solder differ greatly, the bad grasp of the duration and degree of heating, weld strength possibly not reach yet.Electron beam welding also is a kind of welding procedure of frequent employing, because cold head is welded as dissimilar metal, and high to welding requirements, adopt electron beam welding also to have the low problem of solder yield, welding cost is higher simultaneously.How to improve the cold head solder yield, reduce welding cost, significant to the through engineering approaches of Cryo Refrigerator.
The utility model content
The purpose of the utility model is to provide a kind of simple in structure, welding explosive welding (EW) composite Cryo Refrigerator cold head that difficulty is low, qualification rate is high.
The technical solution that realizes the utility model purpose is: a kind of explosive welding (EW) composite Cryo Refrigerator cold head; Be welded by explosive welding (EW) composite cooling cylinder plug and thin-wall stainless steel cooling cylinder; Explosive welding (EW) composite cooling cylinder plug is made up of high heat conductance cold header heat exchanger and stainless steel transition piece explosive welding (EW) composite, and thin-wall stainless steel cooling cylinder and transition piece is integrally welded.
The utility model compared with prior art, its remarkable advantage: the Cryo Refrigerator cold head of (1) the utility model is welded by explosive welding (EW) composite cooling cylinder plug and thin-walled cooling cylinder.Composite is synthetic through explosive welding (EW) by high thermal conductivity material (like oxygen-free copper) and stainless steel.The welding position of cooling cylinder plug and cooling cylinder is stainless steel, and is through being welded to connect, simple in structure.(2) current Cryo Refrigerator cooling cylinder plug adopts high thermal conductivity material (like oxygen-free copper) to make usually, welds with the stainless steel cooling cylinder then; Or high heat conductance cooling cylinder plug elder generation soldering stainless steel transition rings, and then through stainless steel transition rings and the welding of stainless steel cooling cylinder.All there is the welding between the dissimilar metal in such design, makes that the qualification rate of welding is lower and cost is higher.(3) be easy to processing, the Cryo Refrigerator cold head welding cost of employing the utility model is low, qualification rate is high, produces in batches significant to the through engineering approaches of Cryo Refrigerator.
Below in conjunction with accompanying drawing the utility model is described in further detail.
Description of drawings
Fig. 1 is the Cryo Refrigerator cold head that adopts the explosive welding (EW) composite Materials Design.
Fig. 2 is an explosive welding (EW) composite cooling cylinder plug.
Fig. 3 is the two-stage GM refrigeration machine one-level cold head that adopts the explosive welding (EW) composite Materials Design.
Fig. 4 is a two-stage GM refrigeration machine one-level cooling cylinder plug.
The specific embodiment
In conjunction with Fig. 1 and Fig. 2; A kind of explosive welding (EW) composite of the utility model Cryo Refrigerator cold head; Be welded by explosive welding (EW) composite cooling cylinder plug 1 and thin-wall stainless steel cooling cylinder 2; Explosive welding (EW) composite cooling cylinder plug 1 is made up of high heat conductance cold header heat exchanger 101 and stainless steel transition piece 102 explosive welding (EW) composites, and thin-wall stainless steel cooling cylinder 2 and transition piece 102 is integrally welded.
Above-mentioned high heat conductance cold header heat exchanger 101 is that flanged (FLGD) pipe constitutes; Stainless steel transition piece 102 is connected with pipe; the welding transition ring is set on the thin-wall stainless steel cooling cylinder 2; thin-wall stainless steel cooling cylinder 2 inserts in the pipe of stainless steel transition piece 102 and high heat conductance cold header heat exchanger 101, is welded as a whole in the contact site of welding transition ring and stainless steel transition piece 102.
In conjunction with Fig. 3 and Fig. 4; The another kind of explosive welding (EW) composite of the utility model Cryo Refrigerator cold head; Be welded by explosive welding (EW) composite cooling cylinder plug 1 and one-level thin-wall stainless steel cooling cylinder 4 and secondary thin-wall stainless steel cooling cylinder 3; Explosive welding (EW) composite cooling cylinder plug 1 is made up of with one-level cooling cylinder transition connector 104 and secondary cooling cylinder transition connector 103 explosive welding (EW) materials respectively high heat conductance cold header heat exchanger 101 two ends; One-level thin-wall stainless steel cooling cylinder 4 and one-level cooling cylinder transition connector 104 is integrally welded, and secondary thin-wall stainless steel cooling cylinder 3 is integrally welded with secondary cooling cylinder transition connector 103.
Above-mentioned high heat conductance cold header heat exchanger 101 respectively connects a pipe by the counter flange two ends and constitutes; One-level cooling cylinder transition piece 104 is connected with pipe respectively with secondary cooling cylinder transition piece 103; On one-level thin-wall stainless steel cooling cylinder 4 and the secondary thin-wall stainless steel cooling cylinder 3 the welding transition ring is set respectively; One-level thin-wall stainless steel cooling cylinder 4 inserts in the pipe of one-level cooling cylinder transition piece 104 and high heat conductance cold header heat exchanger 101, is welded as a whole in the contact site of welding transition ring and one-level cooling cylinder transition piece 104; Secondary thin-wall stainless steel cooling cylinder 3 inserts in another pipe of secondary cooling cylinder transition piece 103 and high heat conductance cold header heat exchanger 101, is welded as a whole in the contact site of welding transition ring and secondary cooling cylinder transition piece 103.
The explosive welding (EW) composite Cryo Refrigerator cold head of the utility model can be got by the following steps preparation:
The first step is selected suitable explosive welding (EW) composite, comprises the number of plies (two-layer composite or multilayer materials) of composite, confirms the thickness of high thermal conductivity material (like oxygen-free copper), stainless thickness (about 1-2mm);
Second step; Accomplish the processing of explosive welding (EW) cooling cylinder plug; Specifically promptly, at first on the explosive welding (EW) composite, process the circular hole that can insert cooling cylinder, process ladder column type outer surface then; The connected mode (being threaded or other modes) of last basis and load processes the interface with load in the high heat conductance side, processes the interface that welds with cooling cylinder in the stainless steel side;
The 3rd step, the thin-walled cooling cylinder is inserted in the cold head, weld with the thin-walled cooling cylinder;
In the 4th step, accomplish leak detection accordingly.
Explosive welding (EW) composite Cryo Refrigerator cold head also can be used for multistage Cryo Refrigerator, and its technical scheme is the same.
Embodiment 1: combining Fig. 1, Fig. 2, is example with single-stage sterlin refrigerator cold head, and explosive welding (EW) composite Cryo Refrigerator cold head is welded (as shown in Figure 1) by explosive welding (EW) composite cooling cylinder plug and thin-wall stainless steel cooling cylinder, specifically may further comprise the steps:
The first step is selected two-layer explosive welding (EW) composite, confirms the thickness (like 5-10mm) of high thermal conductivity material (like oxygen-free copper), stainless thickness (like 1-2mm);
Second step; Process cooling cylinder plug endoporus so that insert the thin-walled cooling cylinder; Process the ladder cylindrical outer surface; Process the connecting interface with load in composite cooling cylinder plug high thermal conductivity material heat exchanger side, cooling cylinder plug stainless steel transition piece side stay 1-2mm thick in case with the cooling cylinder welding, explosive welding (EW) composite cooling cylinder plug is as shown in Figure 2;
In the 3rd step, cooling cylinder welds with the cooling cylinder plug after inserting the cooling cylinder plug, owing to be intermetallic welding of the same race, adopts Laser Welding to meet the demands, and qualification rate height and cost are low;
In the 4th step, accomplish leak detection accordingly.
Embodiment 2: in multistage Cryo Refrigerator design, can use the explosive welding (EW) composite equally and make the Cryo Refrigerator cold head.In conjunction with Fig. 3, Fig. 4, be example with two-stage GM refrigeration machine one-level cold head, explosive welding (EW) composite Cryo Refrigerator cold head is welded (as shown in Figure 3) with secondary cooling cylinder and one-level cooling cylinder respectively by explosive welding (EW) composite cooling cylinder plug, specifically may further comprise the steps:
The first step is selected three layers of explosive welding (EW) composite, confirms the thickness of high thermal conductivity material heat exchanger (like oxygen-free copper), the thickness of stainless steel secondary cooling cylinder transition piece and stainless steel one-level cooling cylinder transition piece;
Second step; On composite, process the hole of inserting secondary cooling cylinder and one-level cooling cylinder; On composite, process the ladder external cylindrical surface; The processing of the coupling part of high thermal conductivity material and heat load in the completion composite, the processing of stainless steel parts and corresponding cooling cylinder coupling part in the completion composite, the explosive welding (EW) composite cooling cylinder plug that machines is as shown in Figure 4;
In the 3rd step, respectively secondary cooling cylinder and one-level cooling cylinder insertion composite cooling cylinder plug are welded;
In the 4th step, accomplish leak detection accordingly.
Claims (4)
1. explosive welding (EW) composite Cryo Refrigerator cold head; Be welded by explosive welding (EW) composite cooling cylinder plug (1) and thin-wall stainless steel cooling cylinder (2); It is characterized in that explosive welding (EW) composite cooling cylinder plug (1) is made up of high heat conductance cold header heat exchanger (101) and stainless steel transition piece (102) explosive welding (EW) composite, thin-wall stainless steel cooling cylinder (2) and transition piece (102) is integrally welded.
2. explosive welding (EW) composite Cryo Refrigerator cold head according to claim 1; It is characterized in that high heat conductance cold header heat exchanger (101) constitutes for flanged (FLGD) pipe; Stainless steel transition piece (102) is connected with pipe; the thin-wall stainless steel cooling cylinder is provided with the welding transition ring on (2); thin-wall stainless steel cooling cylinder (2) inserts in the pipe of stainless steel transition piece (102) and high heat conductance cold header heat exchanger (101), is welded as a whole in the contact site of welding transition ring and stainless steel transition piece (102).
3. explosive welding (EW) composite Cryo Refrigerator cold head; Be welded by explosive welding (EW) composite cooling cylinder plug (1) and one-level thin-wall stainless steel cooling cylinder (4) and secondary thin-wall stainless steel cooling cylinder (3); It is characterized in that explosive welding (EW) composite cooling cylinder plug (1) is made up of with one-level cooling cylinder transition connector (104) and secondary cooling cylinder transition connector (103) explosive welding (EW) material respectively high heat conductance cold header heat exchanger (101) two ends; One-level thin-wall stainless steel cooling cylinder (4) and one-level cooling cylinder transition connector (104) is integrally welded, and secondary thin-wall stainless steel cooling cylinder (3) is integrally welded with secondary cooling cylinder transition connector (103).
4. explosive welding (EW) composite Cryo Refrigerator cold head according to claim 3; It is characterized in that high heat conductance cold header heat exchanger (101) respectively connects a pipe by the counter flange two ends and constitutes; One-level cooling cylinder transition piece (104) is connected with pipe respectively with secondary cooling cylinder transition piece (103); On one-level thin-wall stainless steel cooling cylinder (4) and the secondary thin-wall stainless steel cooling cylinder (3) the welding transition ring is set respectively; One-level thin-wall stainless steel cooling cylinder (4) inserts in the pipe of one-level cooling cylinder transition piece (104) and high heat conductance cold header heat exchanger (101), is welded as a whole in the contact site of welding transition ring and one-level cooling cylinder transition piece (104); Secondary thin-wall stainless steel cooling cylinder (3) inserts in another pipe of secondary cooling cylinder transition piece (103) and high heat conductance cold header heat exchanger (101), is welded as a whole in the contact site of welding transition ring and secondary cooling cylinder transition piece (103).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204601659U CN202317426U (en) | 2011-11-18 | 2011-11-18 | Explosive welding compound material low temperature refrigerator cold head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204601659U CN202317426U (en) | 2011-11-18 | 2011-11-18 | Explosive welding compound material low temperature refrigerator cold head |
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| Publication Number | Publication Date |
|---|---|
| CN202317426U true CN202317426U (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204601659U Expired - Lifetime CN202317426U (en) | 2011-11-18 | 2011-11-18 | Explosive welding compound material low temperature refrigerator cold head |
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| Country | Link |
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| CN (1) | CN202317426U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106016803A (en) * | 2016-06-29 | 2016-10-12 | 安徽万瑞冷电科技有限公司 | Cooling head of low temperature refrigerating machine |
-
2011
- 2011-11-18 CN CN2011204601659U patent/CN202317426U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106016803A (en) * | 2016-06-29 | 2016-10-12 | 安徽万瑞冷电科技有限公司 | Cooling head of low temperature refrigerating machine |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120711 |
|
| CX01 | Expiry of patent term |