CN208735963U - A kind of drag link mechanism for cryostat - Google Patents
A kind of drag link mechanism for cryostat Download PDFInfo
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- CN208735963U CN208735963U CN201821323271.0U CN201821323271U CN208735963U CN 208735963 U CN208735963 U CN 208735963U CN 201821323271 U CN201821323271 U CN 201821323271U CN 208735963 U CN208735963 U CN 208735963U
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- pull rod
- connecting base
- cold screen
- cryostat
- plate
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Abstract
The utility model discloses a kind of drag link mechanism for cryostat, comprising: upper fixed structure, cold screen pull rod, lower fixed structure, rotary regulating structure；Upper fixed mechanism includes upper connecting base, and upper connecting base is fixedly connected by the first bolt, the first nut with the upper end of cold screen pull rod；Lower fixed mechanism includes: lower connecting base, spacer pin, the first Circular Plate, the second Circular Plate, spring；Rotary regulating structure includes: to adjust screw, third nut, adjusts upper end and the second Circular Plate face contact of screw；The top of Dewar upper plate is equipped with GM refrigeration machine by screw, and the lower end of Dewar upper plate is equipped with the first vacuum separation body, the second vacuum separation body；Helium tank pull rod is connected between the bottom plate and helium tank of lower connecting base.The utility model not only solves refrigeration machine later maintenance difficult problem, also solves the problem of helium tank pull rod hangs over cold screen upper plate and leads to cold screen upper plate insufficient rigidity, refrigeration machine dismounting is easy to maintain, without destroying vacuum environment.
Description
Technical field
The utility model relates to cryostat fields, and in particular to a kind of drag link mechanism for cryostat.
Background technique
In low temperature area research, cryostat be widely used under the conditions of cryogenic thermostat sample it is various low
Warm nature can be carried out test, such as magnetic heating performance, the test of superconductivity, optical physics performance, mechanical performance, physical property.Low temperature
Thermostat is a kind of equipment for being able to maintain cryogenic thermostat condition to carry out low-temperature test.Cryostat can be divided by working principle
Are as follows: liquid storage type cryostat, continuous flowing type cryostat and the cryostat with refrigeration machine.
In cryostat design process, the quality of Tiebar structure be very crucial problem and insider not
One of the key technology of disconnected research, because drag link mechanism not only subjects the gravity and other various physics of entire cold screen and medium
The effect of power, and need to play good thermal insulation in the cold and hot end of thermostat.Refrigeration machine is often dismantled for needs
Cryostat, often there is problems, such as destroy vacuum, dismounting trouble.Therefore, it is necessary to design a set of be applicable in
In the cryostat pull rod of often disassembly refrigeration machine.
Utility model content
The purpose of this utility model is to provide a kind of drag link mechanisms for cryostat, on the one hand solve to system
Cold later maintenance difficult problem；On the other hand it solves helium tank pull rod to hang over cold screen upper plate and lead on cold screen panel stiffness not
The problem of foot.
The purpose of this utility model can be achieved through the following technical solutions:
The utility model provides a kind of drag link mechanism for cryostat, comprising: upper fixed structure, Leng Pingla
Bar, lower fixed structure, rotary regulating structure；Fixed mechanism includes upper connecting base, and the upper end of upper connecting base is welded with Du
Watt upper plate, upper connecting base are fixedly connected by the first bolt, the first nut with the upper end of cold screen pull rod；
The lower fixed mechanism includes: lower connecting base, spacer pin, the first Circular Plate, the second Circular Plate, spring, lower connection
Seat is fixedly connected by the second bolt, the second nut with the lower end of cold screen pull rod, and spacer pin passes through the radial hole of lower connecting base；The
One Circular Plate and the second Circular Plate are arranged from top to bottom and are socketed on lower connecting base, and spring pocket is set on lower connecting base, bullet
Spring is between the first Circular Plate and the second Circular Plate and is in compressive state；
The rotary regulating structure includes: to adjust screw, third nut, and the bottom thread for adjusting screw and lower connecting base connects
It connects, adjusts upper end and the second Circular Plate intimate contact of screw；
The top of the Dewar upper plate is equipped with GM refrigeration machine by screw, the lower end of Dewar upper plate be equipped with the first vacuum every
Disconnected body, the second vacuum separation body, the upper end of the first vacuum separation body and Dewar upper plate weld, the lower end of the first vacuum separation body with
Cold screen upper plate welding；
The upper end of the second vacuum separation body is connect with cold screen upper plate, and lower end is welded with helium tank, the cold screen upper plate
Upper end be equipped with GM refrigeration machine level-one cold head with cold screen upper plate face contact, connect between the bottom plate and helium tank of the lower connecting base
It is connected to helium tank pull rod.
As further program of the utility model, the cold screen pull rod includes that the connector of pull rod at both ends is arranged in and sets
The pull rod main body between connector of pull rod is set, the sectional area of connector of pull rod is greater than the sectional area of pull rod main body and the two passes through
Round-corner transition.
As further program of the utility model, the connector of pull rod be equipped with for the first bolt and the second spiral shell
Tether the circular hole connect.
As further program of the utility model, the upper connecting base includes a cylindrical body and connector, on connector
Square groove, the first threaded hole through connector are offered, the first bolt passes through the first threaded hole and by the first nut to upper company
Joint chair is fastened.
As further program of the utility model, the cold screen upper plate middle position offers a through-hole, non-central
Position offers three or four equally distributed through-holes for lower connecting base installation.
As further program of the utility model, set on the Dewar upper plate there are three equally distributed locating slot and eight
A equally distributed screw hole, screw hole are used for the installation of GM refrigeration machine.
As further program of the utility model, the axial direction of the lower connecting base upper end is provided with square groove and three ring array
The threaded hole of column distribution；Lower connecting base is provided with limit hole between cold screen upper plate and cold screen pull rod.
As further program of the utility model, the first vacuum separation body and the second vacuum separation body are all made of wave
Line tube assembly.
As further program of the utility model, the helium tank pull rod and vertical direction have inclination angle, and section is
Round or rectangle, helium tank pull rod are evenly distributed between lower connecting base bottom plate and helium tank.
The utility model has the beneficial effects that
1, the drag link mechanism for cryostat of the utility model, by be arranged upper fixed structure, cold screen pull rod, under
Fixed mechanism, rotary regulating structure, when refrigeration machine is installed, turning adjusting screw squeezes the second Circular Plate and spring, subtracts
Small first Circular Plate is at a distance from cold screen upper plate, and spacer pin can also be used in the movement for limiting cold screen upper plate, to the first vacuum separation
Body and the second vacuum separation body are protected；When refrigeration machine needs to safeguard disassembly, directly dismantle screw and sealing ring, nothing
Vacuum need to be destroyed, it is easy to operate, solve the problems, such as that helium tank pull rod hangs over cold screen upper plate and cause cold screen upper plate insufficient rigidity,
Refrigeration machine dismounts defect easy to maintain.The mechanism not only meets Functional Requirement and the requirement of good thermal insulation, also has
Advantage quick detachable to refrigeration machine, easy to maintain.
2, cold screen pull rod is made of connector of pull rod and pull rod main body, and the sectional area of connector of pull rod is greater than pull rod main body
Sectional area and the two the intensity of the structure can not only be increased by round-corner transition, but also stress concentration can be reduced, make it
It is strong to the bearing capacity of lower connecting base, cold screen upper plate, it is not easy to break；Pull rod main body sectional area design it is smaller, due to heat output with
Heat-conducting area is directly proportional, so reduces static evaporation capacity, improves heat insulation.
3, the first vacuum separation body and the second vacuum separation body are all made of bellows component, due to heat output and heat-conducting area
Directly proportional and be inversely proportional with thermally conductive length, system leakage heat can be reduced by being designed in this way.
Detailed description of the invention
The utility model will be further described below with reference to the accompanying drawings.
Fig. 1 is structural schematic diagram of the utility model for the drag link mechanism of cryostat.
Fig. 2 is assembly structure figure of the utility model for the drag link mechanism of cryostat.
Fig. 3 is the top view of the utility model upper connecting base.
Fig. 4 is the front view of the utility model upper connecting base.
Fig. 5 is the side view of the utility model upper connecting base.
Fig. 6 is the bottom view of the utility model lower connecting base.
Fig. 7 is the side view of the utility model lower connecting base.
Fig. 8 is the front view of the utility model lower connecting base.
Fig. 9 is the sectional view of the cold screen pull rod of the utility model.
Specific embodiment
Below in conjunction with the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out clear, complete
Site preparation description, it is clear that the described embodiments are only a part of the embodiments of the utility model, instead of all the embodiments.
Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, fall within the protection scope of the utility model.
It please refers to shown in Fig. 1-2, a kind of drag link mechanism for cryostat, comprising: upper fixed structure, cold screen pull rod
4, lower fixed structure, rotary regulating structure.Upper fixed mechanism includes upper connecting base 2, and the upper end of upper connecting base 2 is welded on Dewar
Plate 14, upper connecting base 2 are fixedly connected by the first bolt 1, the first nut 3 with the upper end of cold screen pull rod 4.The material of cold screen pull rod 4
Material is G10 glass fibre, it is possible to reduce leakage heat.It is set on Dewar upper plate 14 there are three equally distributed locating slot, convenient on Dewar
Plate 14 is connect with upper connecting base 2.
As shown in fig.9, cold screen pull rod 4 includes that the connector of pull rod 41 at both ends is arranged in and is arranged in connector of pull rod 41
Between pull rod main body 42, the sectional area of connector of pull rod 41 is greater than the sectional area of pull rod main body 42 and the two passes through fillet mistake
It crosses, purpose of design is to increase structural strength and reduce stress to concentrate.The sectional area design of pull rod main body 42 is smaller, due to heat transfer
Amount is directly proportional to heat-conducting area, so reduces static evaporation capacity, improves heat insulation.Connector of pull rod 41 is equipped with circular hole,
Connection for the first bolt 1 and the second bolt 6.
Refering to shown in Fig. 3-5, upper connecting base 2 includes a cylindrical body and connector, square groove is offered on connector, through company
First threaded hole of junctor, the first bolt 1 pass through the first threaded hole and are fastened by the first nut 3 to upper connecting base 2.
Refering to fig. 1 shown in -2, lower fixed mechanism includes: lower connecting base 12, spacer pin 7, the first Circular Plate 8, the second annulus
Plate 9, spring 13, lower connecting base 12 are fixedly connected by the second bolt 6, the second nut 5 with the lower end of cold screen pull rod 4, spacer pin
7 pass through the radial hole of lower connecting base 12.First Circular Plate 8 and the second Circular Plate 9 are arranged from top to bottom and are socketed on lower connection
On seat 12, spring 13 is sheathed on lower connecting base 12, and spring 13 is between the first Circular Plate 8 and the second Circular Plate 9.Lower company
Joint chair 12 is provided with limit hole between cold screen upper plate 19 and cold screen pull rod 4.Rotary regulating structure includes: to adjust screw 11, third
Nut 10 adjusts screw 11 and connect with the bottom thread of lower connecting base 12, adjusts the upper end and 9 face of the second Circular Plate of screw 11
Contact, the quantity for adjusting screw 11 is three.Cold screen upper plate 19 is equipped between spacer pin 7 and the first Circular Plate 8, spacer pin 7 has
The effect of limited 19 shift motion of refrigeration screen upper plate.
Refering to shown in Fig. 6-8, the axial direction of 12 upper end of lower connecting base is provided with square groove, and axial direction opens up that there are three circle ring arrays point
The threaded hole of cloth, for adjusting the installation of screw 11.Refering to fig. 1 shown in -2, the top of Dewar upper plate 14 is installed by screw 21
Have a GM refrigeration machine 22, the lower end of Dewar upper plate 14 is equipped with the first vacuum separation body 20, the second vacuum separation body 17, the first vacuum every
The upper end of disconnected body 20 and Dewar upper plate 14 weld, and the lower end of the first vacuum separation body 20 and cold screen upper plate 19 weld.First vacuum
Partition body 20 and the second vacuum separation body 17 are all made of bellows component, are used for Dewar upper plate 14, cold screen upper plate 19 and helium tank
Bit shift compensation and cold and hot shrinkage-compensating between 16.Such structure design, not only increases pull rod intensity, can carry entire cold screen
With the effect of the gravity of medium and other various physical forces, also there is good heat-insulating property.Second vacuum separation body 17 it is upper
End is connect with cold screen upper plate 19, and lower end is welded with helium tank 16.The upper end of cold screen upper plate 19 is equipped with and cold 19 face contact of screen upper plate
GM refrigeration machine level-one cold head 18.Helium tank pull rod 15 is connected between the bottom plate and helium tank 16 of lower connecting base 12.Helium tank
Pull rod 15 and vertical direction have inclination angle, and section is round or rectangle, totally three or four groups and are uniformly distributed.Helium tank pull rod 15 is
Stainless steel material can reduce leakage heat using elongated shape.The second Circular Plate 9 is squeezed by turning adjusting screw 11, to subtract
Small first Circular Plate 8 between cold screen upper plate 19 at a distance from.Spacer pin 7 is used to limit the shift motion of cold screen upper plate 19, to first
Vacuum separation body 20 and the second vacuum separation body 17 are protected.
When cryostat does not install refrigeration machine structure, due to the effect of spring 13, the first vacuum separation body 20 and
The distribution of two vacuum separation bodies 17 will receive pulling force and pressure effect and generate deformation.First vacuum separation body 20 and the second vacuum
The material for separating body 17 is bellows.If the deflection of bellows is more than its allowed band, plastic deformation can be generated and failed.
For protecting to the first vacuum separation body 20 and the second vacuum separation body 17, which is provided with spacer pin 7.Limit
Pin 7 limits the deformation of the first vacuum separation body 20 and the second vacuum separation body 17 by the shift motion of the cold screen upper plate 19 of control
Amount, to reach protective effect.
When first time installing GM refrigeration machine 22, GM refrigeration machine second level cold head 18 passes through 14 center hole of Dewar upper plate and arrives
Reach and with 19 upside of cold screen upper plate.After tightening eight screws 21 and sealing ring, due to the effect of spring 13, GM refrigeration machine second level
Cold head 18 is adequately contacted with cold screen upper plate 19, therefore is kept good before the two and passed cold property.First vacuum separation body
It is the material of bellows with the second vacuum separation body, the displacement of cold screen upper plate 19 can be compensated.During the test, true by taking out
Empty and down force caused by cooling down may be greater than the upper pressure of spring 13, and lead to GM refrigeration machine second level cold head 18 and cold
Shield upper plate 19 to separate, so that is both influenced wears cold property.This problem occurs in order to prevent, tightens adjusting screw 11 and kills bullet
Then spring 13 carries out the assembly of cryostat other component again.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one of the utility model
In embodiment or example.In the present specification, schematic expression of the above terms be not necessarily referring to identical embodiment or
Example.Moreover, particular features, structures, materials, or characteristics described can be in any one or more embodiment or examples
In can be combined in any suitable manner.
Above content is only to the utility model structure example and explanation, the technology people of affiliated the art
Member makes various modifications or additions to the described embodiments or is substituted in a similar manner, without departing from reality
With novel structure or beyond the scope defined by this claim, all should belong to the protection range of the utility model.
Claims (9)
1. a kind of drag link mechanism for cryostat characterized by comprising upper fixed structure, cold screen pull rod (4), under
Fixed structure, rotary regulating structure；Fixed mechanism includes upper connecting base (2), and the upper end of upper connecting base (2) is welded with Du
Watt upper plate (14), upper connecting base (2) are fixedly connected by the first bolt (1), the first nut (3) with the upper end of cold screen pull rod (4)；
The lower fixed mechanism includes: lower connecting base (12), spacer pin (7), the first Circular Plate (8), the second Circular Plate (9), bullet
Spring (13), lower connecting base (12) are fixedly connected by the second bolt (6), the second nut (5) with the lower end of cold screen pull rod (4), limit
Position pin (7) passes through the radial hole of lower connecting base (12)；First Circular Plate (8) and the second Circular Plate (9) setting from top to bottom and
Be socketed on lower connecting base (12), spring (13) is sheathed on lower connecting base (12), spring (13) be located at the first Circular Plate (8) with
Between second Circular Plate (9) and it is in compressive state；
The rotary regulating structure includes: to adjust screw (11), third nut (10), adjusts screw (11) and lower connecting base (12)
Bottom thread connection, adjust screw (11) upper end and the second Circular Plate (9) intimate contact；
The top of the Dewar upper plate (14) is equipped with GM refrigeration machine (22) by screw (21), and the lower end of Dewar upper plate (14) is set
There are the first vacuum separation body (20), the second vacuum separation body (17), the upper end of the first vacuum separation body (20) and Dewar upper plate
(14) it welds, the lower end of the first vacuum separation body (20) and cold screen upper plate (19) are welded；
The upper end of the second vacuum separation body (17) is connect with cold screen upper plate (19), and lower end is welded with helium tank (16), described
The upper end of cold screen upper plate (19) is equipped with the GM refrigeration machine level-one cold head (18) with cold screen upper plate (19) face contact, the lower connecting base
(12) helium tank pull rod (15) is connected between bottom plate and helium tank (16).
2. the drag link mechanism according to claim 1 for cryostat, which is characterized in that the cold screen pull rod (4)
Including the pull rod main body (42) that the connector of pull rod (41) at both ends is arranged in and is arranged between connector of pull rod (41), pull rod connects
The sectional area of junctor (41) is greater than the sectional area of pull rod main body (42) and the two passes through round-corner transition.
3. the drag link mechanism according to claim 2 for cryostat, which is characterized in that the connector of pull rod
(41) it is equipped with the circular hole for connecting with the first bolt (1) and the second bolt (6).
4. the drag link mechanism according to claim 1 for cryostat, which is characterized in that the upper connecting base (2)
Including a cylindrical body and connector, square groove, the first threaded hole through connector are offered on connector, the first bolt (1) is worn
It crosses the first threaded hole and upper connecting base (2) is fastened by the first nut (3).
5. the drag link mechanism according to claim 1 for cryostat, which is characterized in that the cold screen upper plate (19)
Middle position offers a through-hole, and non-center position offers three or four equally distributed be used for lower connecting base (12) and installs
Through-hole.
6. the drag link mechanism according to claim 1 for cryostat, which is characterized in that the Dewar upper plate (14)
On set there are three equally distributed locating slot and eight equally distributed screw holes, screw hole is used for the peace of GM refrigeration machine (22)
Dress.
7. the drag link mechanism according to claim 1 for cryostat, which is characterized in that the lower connecting base (12)
The axial direction of upper end is provided with the threaded hole of square groove and the distribution of three circle ring arrays；Lower connecting base (12) is in cold screen upper plate (19) and cold screen
Pull rod is provided with limit hole between (4).
8. the drag link mechanism according to claim 1 for cryostat, which is characterized in that first vacuum separation
Body (20) and the second vacuum separation body (17) are all made of bellows component.
9. the drag link mechanism according to claim 1 for cryostat, which is characterized in that the helium tank pull rod
(15) there is inclination angle with vertical direction, section is that round or rectangle, helium tank pull rod (15) are evenly distributed on lower connecting base
(12) between bottom plate and helium tank (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821323271.0U CN208735963U (en) | 2018-08-16 | 2018-08-16 | A kind of drag link mechanism for cryostat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821323271.0U CN208735963U (en) | 2018-08-16 | 2018-08-16 | A kind of drag link mechanism for cryostat |
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| Publication Number | Publication Date |
|---|---|
| CN208735963U true CN208735963U (en) | 2019-04-12 |
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ID=66029831
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821323271.0U Active CN208735963U (en) | 2018-08-16 | 2018-08-16 | A kind of drag link mechanism for cryostat |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109059331A (en) * | 2018-08-16 | 2018-12-21 | 合肥中科离子医学技术装备有限公司 | A kind of drag link mechanism for cryostat |
-
2018
- 2018-08-16 CN CN201821323271.0U patent/CN208735963U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109059331A (en) * | 2018-08-16 | 2018-12-21 | 合肥中科离子医学技术装备有限公司 | A kind of drag link mechanism for cryostat |
| CN109059331B (en) * | 2018-08-16 | 2024-03-26 | 合肥中科离子医学技术装备有限公司 | Pull rod mechanism for cryostat |
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