CN215065676U - Take general low temperature device of storage tank - Google Patents
Take general low temperature device of storage tank Download PDFInfo
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- CN215065676U CN215065676U CN202023303674.9U CN202023303674U CN215065676U CN 215065676 U CN215065676 U CN 215065676U CN 202023303674 U CN202023303674 U CN 202023303674U CN 215065676 U CN215065676 U CN 215065676U
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Abstract
A general low-temperature device with a storage tank comprises a refrigerant component, an instrument skirt, a vacuum cover, the storage tank, a sample seat and a sample holder, wherein the refrigerant component, the instrument skirt and the vacuum cover are sequentially connected from top to bottom; the sample holder is loaded with a sample to be tested and is arranged at the lower part of the sample seat, the sample seat is arranged at the lower part of the storage tank, and the storage tank, the sample holder and the sample seat are arranged in the vacuum cover; the refrigerant assembly includes a liquid nitrogen type assembly and a liquid helium type assembly. Based on the technical scheme of the utility model, can realize rapid cooling, do not have the vibration, the alternating temperature range covers extensively, and the temperature control precision is high, but long-time continuous operation.
Description
Technical Field
The utility model belongs to the technical field of low temperature physics experimental apparatus, a take general type low temperature equipment of storage tank is related to.
Background
With the continuous exploration and innovation of scientific research, people have not satisfied the test and research at room temperature, and have pursued the research and discovery under more extreme conditions. It is well known that changes in temperature may affect the results of testing substances, so testing substances under different temperature conditions may be more helpful to our scientific research.
Liquid helium and liquid nitrogen are very important and efficient refrigerants and can be directly used as cold sources to provide a low-temperature environment. A cryostat made of liquid helium and liquid nitrogen is matched with a thermometer and a heater to carry out temperature changing and controlling, and the cryostat can be widely applied to researches such as spectrum testing, material characteristics, low-temperature imaging and the like.
The traditional cryostat has poor temperature stability, small temperature change range and inconvenient sample replacement, thereby greatly reducing the experimental efficiency. Therefore, a new cryogenic device is needed to solve the above problems.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems existing in the prior art, the utility model aims to provide a take general low temperature equipment of storage tank.
The utility model adopts the following technical proposal:
a universal low-temperature device with a storage tank comprises a refrigerant component, an instrument skirt, a vacuum cover, the storage tank, a sample seat and a sample holder,
the refrigerant assembly, the instrument skirt and the vacuum cover are sequentially connected from top to bottom;
the sample holder is loaded with a sample to be tested and is arranged at the lower part of the sample seat, the sample seat is arranged at the lower part of the storage tank, and the storage tank, the sample holder and the sample seat are arranged in the vacuum cover;
the cryogen assembly includes a liquid nitrogen type assembly and a liquid helium type assembly.
The liquid nitrogen type subassembly includes plug, filling mouth, first annular knurl nut, gas vent, first clamp, pipe and hot displacer, and above-mentioned part top-down links to each other in proper order.
The guide pipe is of a stainless steel hollow structure, and a hole with the diameter of 4mm is reserved on the pipe wall;
the hot displacer is positioned at the bottom of the liquid nitrogen component and is of an inverted stainless steel groove structure;
the conduit and the heat displacer are both located inside the tank.
The liquid helium type component comprises a liquid helium transmission pipeline, a second knurled nut, a three-way pipe, a first safety valve and a second hoop from top to bottom in sequence.
The liquid helium pipeline is a stainless steel corrugated pipe with a vacuum interlayer;
the second knurled nut is used for adjusting the upper and lower positions of the pipe leg part of the liquid helium conveying pipeline;
the three-way pipe is connected with the second knurled nut, the first safety valve and the component inlet through three hoops respectively.
A second safety valve, an electrical connector, a blind plate opening and a vacuumizing connector are arranged on the periphery of the instrument skirt,
the vacuumizing joint comprises a ball valve and a pumping opening;
the electric connector is connected with the sample holder, the thermometer and the heater through the inside of an electric lead, and the outside of the electric connector is connected with a measuring device.
The pumping port is connected with the vacuumizing port of the vacuum pump;
the quick-disassembly type clamp is connected with the lower part of the instrument skirt and the vacuum cover.
The vacuum cover is made of polished stainless steel, and a vacuum cavity is formed inside the vacuum cover;
a predetermined number of optical windows are left around the lower portion of the vacuum enclosure, one of which is located at the bottom of the vacuum enclosure.
The number of the optical windows is 1-5.
The storage tank stores liquid nitrogen or liquid helium inside, the bottom of the storage tank is of a groove structure, and the space of the storage tank accommodates the tail end of the heat displacer or the liquid helium transmission pipeline;
the side wall of the storage tank is wrapped with a preset number of layers of heat insulation films;
the bottom of the storage tank is provided with a groove body which is concave inwards, the activated carbon tank is arranged in the groove body, the opening of the activated carbon tank faces the vacuum cavity, and activated carbon particles are filled in the tank body;
the sample seat is made of an oxygen-free copper material, the sample support is made of a gold-plated oxygen-free copper material, and a sample to be detected is mounted on the sample support and is mounted on the lower portion of the sample seat.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the utility model is compatible with liquid nitrogen and liquid helium, changes the temperature of the sample seat in a heat conduction way, and has the characteristics of high efficiency and no vibration; a refrigerant component is introduced, the temperature change range can reach 4K-500K, the temperature control precision can reach +/-30 mK, and the test can be carried out for a long time; for the liquid nitrogen component, the groove at the bottom of the storage tank is designed to adjust the content of liquid nitrogen at the bottom of the storage tank, so that the requirement of a sample on refrigerating capacity is met, the consumption of a sample seat on the liquid nitrogen can be controlled by adjusting a heat exchanger in a high-temperature region, and the consumption of the liquid nitrogen is greatly saved; after liquid nitrogen is filled once, the minimum temperature holding time is up to 13 hours, and the continuity of the experiment is ensured.
Drawings
Fig. 1 is a front view of the main body of the device of the present invention;
FIG. 2 is a front view of the liquid nitrogen assembly of the present invention;
FIG. 3 is a front view of the liquid helium assembly of the present invention;
figure 4 is a top view of the instrument skirt of the present invention,
wherein, 1 is a liquid nitrogen component, 2 is a liquid helium component, 3 is a component inlet, 4 is an instrument skirt, 5 is a quick-release type clamp, 6 is a vacuum cover, 7 is a storage tank, 8 is an activated carbon tank, 9 is a sample seat, 10 is an optical window, 11 is a sample holder, 12 is a plug, 13 is a filling port, 14 is a first knurled nut, 15 is an exhaust port, 16 is a first clamp, 17 is a guide pipe, 18 is a heat displacer, 19 is a liquid helium transmission pipeline, 20 is a second knurled nut, 21 is a three-way pipe, 22 is a first safety valve, 23 is a second clamp, 24 is an electrical connector, 25 is a second safety valve, 26 is a blind plate port, 27 is a ball valve, and 28 is a pumping port.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the drawings in the embodiments of the present invention will be combined below to clearly and completely describe the technical solutions of the present invention. The embodiments described herein are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art without creative efforts will fall within the protection scope of the present invention based on the spirit of the present invention.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
The utility model provides a take general type low temperature equipment of storage tank, the cooling rate is fast, there is not vibration, and the alternating temperature scope covers extensively, and the temperature control precision is high, but long-time continuous operation. The low-temperature device is compatible with liquid nitrogen or liquid helium, the sample holder is subjected to temperature change in a heat transfer mode, the temperature is quickly changed and controlled through the refrigerant assembly matched with a built-in thermometer, a heater and an external temperature controller, vibration is not generated, the temperature change range can reach 4K-500K, the minimum temperature keeping time can reach 13 hours after liquid nitrogen is filled once, and the temperature control precision can reach +/-30 mK.
Fig. 1 is a front view of the main body of the device of the present invention; FIG. 2 is a front view of the liquid nitrogen assembly of the present invention; FIG. 3 is a front view of the liquid helium assembly of the present invention; fig. 4 is a plan view of the instrument skirt of the present invention. The utility model provides a take general low temperature equipment structure of storage tank is, refrigerant subassembly, instrument skirt 4, vacuum hood 6 top-down connect gradually. The storage tank 7, the sample seat 9 and the sample support 11 are tightly connected from top to bottom, and the storage tank 7, the sample seat 9 and the sample support 11 are positioned inside the vacuum cover 6. The liquid nitrogen component 1 comprises a plug 12, a filling port 13, a first knurled nut 14, an exhaust port 15, a first clamp 16, a guide pipe 17 and a hot displacer 18, which are sequentially connected from top to bottom. The conduit 17 is a stainless steel hollow structure, and a small hole is reserved on the wall of the conduit. The hot displacer 18 is located at the bottom of the liquid nitrogen component 1 and is of an inverted stainless steel groove structure. Both the conduit 17 and the hot displacer 18 are located inside the tank 7. The liquid helium component 2 comprises a liquid helium transmission pipeline 19, a second knurled nut 20, a three-way pipe 21, a first safety valve 22 and a second hoop 23 from top to bottom in sequence. The liquid helium line is a stainless steel bellows with a vacuum interlayer. The second knurled nut 20 is used to adjust the up and down position of the leg portion of the liquid helium transfer line 19. And the three-way pipe 21 is connected with the second knurled nut 20, the first safety valve 22 and the component inlet 3 through three hoops respectively. The first relief valve 22 can withstand a threshold pressure of 4 PSI. The instrument skirt 4 is provided with a second safety valve 25, an electrical connector 24, a blind flange opening 26 and a vacuum connector which comprises a ball valve 27 and a pumping opening 28. The electric connector 24 is connected to the sample holder 11, the thermometer and the heater via an electric lead, and is connected to the measuring device from the outside. The second relief valve 25 can withstand a maximum pressure of 4 PSI. The ball valve 27 is used for controlling the communication and closing of the external suction pipeline and the vacuum cavity. The pumping port 28 is connected to an external vacuum pump. And a quick-disassembly type clamp 5 is used for fixing the lower part of the instrument skirt 4 and the vacuum cover 6 together. The vacuum cover 6 is made of high polishing stainless steel and is internally provided with a vacuum cavity. Optical windows 10 are reserved at the lower part of the vacuum cover 6, the number of the optical windows 10 can be 1-5, and one of the optical windows can be positioned at the bottom of the vacuum cover 6. Blind plates or louvers may be used to vacuum seal the window as required by the experiment. The storage tank 7 is a high-polishing stainless steel tank with the volume of 0.4L, liquid nitrogen or liquid helium is stored inside the tank, the bottom of the tank is of a groove structure, the space of the tank is just used for accommodating the tail end of a heat displacer 18 or a liquid helium transmission pipeline 19, and the side wall of the storage tank 7 is wrapped by a plurality of layers of super-insulating films. The bottom of the storage tank 7 is additionally provided with an internally concave tank body for installing an activated carbon tank 8, the tank opening faces the vacuum cavity, and activated carbon particles are filled in the tank. The sample seat 9 is made of high-purity oxygen-free copper material, the sample support 11 is made of gold-plated oxygen-free copper material, and a sample to be detected is mounted on the sample support 11 and is mounted on the lower portion of the sample seat 9. The sample to be measured is centered on the optical window 10.
When the low-temperature device works, firstly, the low-temperature device is vacuumized, specifically, the pumping port 28 is connected with a vacuum pump, the vacuum pump is started, the ball valve 27 on the low-temperature device is opened, the pumping is continuously performed, and the vacuum degree is reduced to 10-5When mbar is in magnitude, the ball valve 27 and the vacuum pump are closed. Secondly, pre-cooling the low-temperature device,specifically, the cryogenic device body portion and the refrigerant assembly are connected, and only the clamp at the assembly inlet 3 needs to be opened and fixed at this time. 1) For the liquid nitrogen component 1, the plug 12 needs to be pulled out, the funnel is placed at the filling port 13, liquid nitrogen is filled, after the temperature is reduced to the lowest temperature, the liquid nitrogen is kept for half an hour, and then the liquid nitrogen is continuously filled until the liquid nitrogen storage tank 7 is full; 2) for liquid helium assembly 2, liquid helium delivery line 19 is connected to an external liquid helium dewar, and liquid helium is slowly introduced into storage tank 7, with the flow of liquid helium being appropriately reduced and maintained at the lowest temperature after the lowest temperature is reached. In addition, the liquid helium component 2 can be used for the experiment of the liquid nitrogen temperature zone, and the liquid nitrogen in the liquid nitrogen Dewar can be led into the storage tank 7 through the liquid helium conveying pipeline 19. And finally, changing the temperature and controlling the temperature according to the experimental requirements, specifically, adjusting a knurled nut, and lifting and pulling the guide pipe 17 of the liquid nitrogen component 1 up and down so as to change the content of the liquid nitrogen in the groove at the bottom of the storage tank 7, and matching with a thermometer, a heater and a temperature controller to change the temperature and control the temperature. The liquid helium component 2 cannot assist in temperature control and is only used for conveying and filling liquid helium and liquid nitrogen. For the liquid nitrogen component 1, if the liquid nitrogen needs to be supplemented for a long-time test, the plug 12 can be directly opened to fill the liquid nitrogen, and the continuity of the test is not influenced.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents of the embodiments of the invention may be made without departing from the spirit and scope of the invention, which should be construed as falling within the scope of the claims of the invention.
Claims (10)
1. A universal low-temperature device with a storage tank comprises a refrigerant component, an instrument skirt, a vacuum cover, the storage tank, a sample seat and a sample holder,
the refrigerant assembly, the instrument skirt and the vacuum cover are sequentially connected from top to bottom;
the sample holder is loaded with a sample to be tested and is arranged at the lower part of the sample seat, the sample seat is arranged at the lower part of the storage tank, and the storage tank, the sample holder and the sample seat are arranged in the vacuum cover;
the cryogen assembly includes a liquid nitrogen type assembly and a liquid helium type assembly.
2. The universal cryogenic device with a storage tank of claim 1,
the liquid nitrogen type component comprises a plug, a filling opening, a first knurled nut, an exhaust opening, a first clamp, a conduit and a heat exchanger which are sequentially connected from top to bottom.
3. The universal cryogenic device with a storage tank of claim 2,
the guide pipe is of a stainless steel hollow structure, and a hole with the diameter of 4mm is reserved on the pipe wall;
the hot displacer is positioned at the bottom of the liquid nitrogen type component and is of an inverted stainless steel groove structure;
the conduit and the heat displacer are both located inside the tank.
4. The universal cryogenic device with a storage tank of claim 1,
the liquid helium type component comprises a liquid helium transmission pipeline, a second knurled nut, a three-way pipe, a first safety valve and a second hoop from top to bottom in sequence.
5. The universal cryogenic device with a storage tank of claim 4,
the liquid helium transmission pipeline is a stainless steel corrugated pipe with a vacuum interlayer;
the second knurled nut is used for adjusting the upper and lower positions of the pipe leg part of the liquid helium conveying pipeline;
the three-way pipe is connected with the second knurled nut, the first safety valve and the component inlet through three hoops respectively.
6. The universal cryogenic device with a storage tank of claim 1,
a second safety valve, an electrical connector, a blind plate opening and a vacuumizing connector are arranged on the periphery of the instrument skirt,
the vacuumizing joint comprises a ball valve and a pumping opening;
the electric connector is connected with the sample holder, the thermometer and the heater through the inside of an electric lead, and the outside of the electric connector is connected with a measuring device.
7. The universal cryogenic device with a storage tank of claim 6,
the pumping port is connected with the vacuumizing port of the vacuum pump;
the quick-disassembly type clamp is connected with the lower part of the instrument skirt and the vacuum cover.
8. The universal cryogenic device with a storage tank of claim 7,
the vacuum cover is made of polished stainless steel, and a vacuum cavity is formed inside the vacuum cover;
a predetermined number of optical windows are left around the lower portion of the vacuum enclosure, one of which is located at the bottom of the vacuum enclosure.
9. The universal cryogenic device with a storage tank of claim 8,
the number of the optical windows is 1-5.
10. The universal cryogenic device with a storage tank of claim 3,
the storage tank stores liquid nitrogen or liquid helium inside, the bottom of the storage tank is of a groove structure, and the space of the storage tank accommodates the tail end of the heat displacer or the liquid helium transmission pipeline;
the side wall of the storage tank is wrapped with a preset number of layers of heat insulation films;
the bottom of the storage tank is provided with a groove body which is concave inwards, the activated carbon tank is arranged in the groove body, the opening of the activated carbon tank faces the vacuum cavity, and activated carbon particles are filled in the tank body;
the sample seat is made of an oxygen-free copper material, the sample support is made of a gold-plated oxygen-free copper material, and a sample to be detected is mounted on the sample support and is mounted on the lower portion of the sample seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023303674.9U CN215065676U (en) | 2020-12-30 | 2020-12-30 | Take general low temperature device of storage tank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023303674.9U CN215065676U (en) | 2020-12-30 | 2020-12-30 | Take general low temperature device of storage tank |
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| Publication Number | Publication Date |
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| CN215065676U true CN215065676U (en) | 2021-12-07 |
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| CN202023303674.9U Active CN215065676U (en) | 2020-12-30 | 2020-12-30 | Take general low temperature device of storage tank |
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