Liquid helium refrigeration ultralow-temperature impact sample transfer device
By designing a liquid helium-cooled cryogenic impact sample transfer device, the sample can be transferred independently and the temperature can be monitored in real time. This solves the problems of liquid helium waste and inaccurate temperature control, and improves the accuracy and efficiency of the experiment.
Patent Information
- Application Number
- CN202420366771.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-27
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-02-27
AI Technical Summary
In existing liquid helium-cooled cryogenic impact tests, the sample transfer method leads to a significant loss of liquid helium and inaccurate temperature control, affecting the test results.
Design a liquid helium-cooled cryogenic impact sample transfer device, including a sample placement tank, a support rod, a handle, and a temperature testing unit. The temperature changes are monitored in real time by a temperature sensor. The support rod is designed as an independent tool to reduce the contact area with liquid helium, and the support rod hook facilitates the suspension of multiple sets of samples, enabling independent transfer.
This achieves the economical use of liquid helium and precise temperature control, improving the accuracy and efficiency of experimental results.
Smart Images
Figure CN222318608U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of steel low-temperature impact test, in particular to a liquid helium refrigeration ultra-low-temperature impact sample transfer device. Background Art
[0002] The emergence of global environmental problems has accelerated the transformation of the energy structure towards reducing dependence on fossil fuels. As a low-carbon energy source, hydrogen energy has the advantages of large reserves, high calorific value, and zero pollution, and has become the focus of development. Liquid hydrogen has many advantages over high-pressure hydrogen, mainly in that liquid hydrogen has a large density, large storage and transportation scale, convenient storage and transportation, lower transportation costs, low working pressure and greater safety, high liquid hydrogen storage-to-weight ratio, which allows vehicles with the same weight of hydrogen tanks to travel longer mileage, and the hydrogen purity of the liquid hydrogen supply system can better meet user needs.
[0003] Low-temperature liquid hydrogen storage means first liquefying hydrogen and then storing it in a low-temperature insulated container. Since liquid hydrogen is flammable, explosive, easy to gasify, and easy to diffuse, the low-temperature insulated container for storing liquid hydrogen must meet the requirements of safety, stability, reliable functions, and low loss. The boiling point of liquid hydrogen is -253°C, which is an ultra-low temperature medium. Ultra-low temperature will cause the material of the storage container to undergo a tough-to-brittle transition, causing the container to rupture and damage, which is very likely to cause safety problems. Therefore, low-temperature toughness is crucial for liquid hydrogen storage and transportation pressure vessels. Steel is usually tested for its low-temperature toughness through low-temperature impact tests. The -269°C low-temperature impact test is used to test the low-temperature toughness of liquid hydrogen containers. The -269°C low-temperature impact test cannot meet the requirements with liquid nitrogen, so it can only be completed with liquid helium. However, due to the high price of liquid helium and inconvenient transportation, it is mostly used in the medical and military fields.
[0004] Due to the low temperature of liquid helium, the existing domestic equipment and tooling cannot directly use cryogenic tanks for cooling, and can only cool the sample in liquid helium medium. It is stipulated that the sample should be placed on the grid in the container, the grid should be at least 25mm higher than the bottom of the container, the height of the liquid helium soaking the sample should be at least 25mm, the sample should be at least 10mm away from the side wall of the container, and it should be kept in the medium for at least 5 minutes before being transferred to the impact position. Since a small change in the test temperature will cause a huge change or abrupt jump in the test data, the results will be inaccurate or even unqualified. Therefore, the standard stipulates that the time from the removal of the sample from the liquid helium to the interruption should not exceed 5s, the design and use of the cooling transfer device should be able to keep the sample temperature within the allowable temperature range, and the ultra-low temperature impact sample transfer tooling that contacts the sample should be cooled together with the sample.
[0005] At present, when using liquid medium cooling, the use of mesh grids will cause a large loss of liquid helium when taking out the sample due to the large area of the sample being placed on the mesh grid, resulting in waste. In addition, since the liquid helium comes into contact with the air, the air will immediately freeze into a hard surface layer on the surface of the liquid helium, making it difficult to clamp the sample and transfer it, making the transfer time exceed 5s, affecting the test results.
[0006] In view of the above reasons, the utility model proposes a liquid helium refrigeration ultra-low temperature impact sample transfer device to solve the above technical problems. Utility Model Content
[0007] The utility model aims to provide a liquid helium refrigeration ultra-low temperature impact sample transfer device, which can realize independent transfer of samples, has a small contact area, avoids causing a large loss of liquid helium, and can observe temperature changes in real time, so as to control the test temperature more accurately.
[0008] The utility model provides a liquid helium refrigeration ultra-low temperature impact sample transfer device, comprising: a sample placement groove, a support rod, a handle and a temperature testing unit, wherein the bottom end of the support rod is fixedly connected to one side of the sample placement groove, the top end of the support rod is fixedly connected to the handle, the temperature testing unit is installed at the end of the handle, a temperature sensor is arranged on one side of the sample placement groove, and the temperature sensor is electrically connected to the temperature testing unit.
[0009] Preferably, the temperature testing unit comprises a processor, a temperature receiving module, a display, an automatic timing module and a power supply module.
[0010] Preferably, the temperature receiving module is electrically connected to the temperature sensor via a wire, and the processor is electrically connected to the temperature receiving module, the display and the automatic timing module.
[0011] Preferably, the processor, the temperature receiving module, the display and the automatic timing module are all electrically connected to the power module.
[0012] Preferably, the power module is connected to a power cord, and the power module is configured with a charging interface.
[0013] Preferably, a hook is provided on one side of the support rod.
[0014] Preferably, the support rod is vertically connected to one side of the sample placement groove.
[0015] Preferably, baffles are provided on both sides of the sample placement groove.
[0016] Preferably, the baffle is arranged in a U shape.
[0017] Preferably, a positioning hole is provided at the bottom of the sample placement groove.
[0018] Compared with the prior art, the utility model has the following beneficial effects:
[0019] 1. The existing sample transfer method of the entire grid raises the whole grid, which causes a large loss of liquid helium due to the large contact area. The utility model can realize the independent transfer of a single sample with a small contact area, thus avoiding the waste of liquid helium as much as possible. At the same time, multiple groups of samples can be hung around the container to improve the transfer efficiency;
[0020] 2. Through the temperature sensor and temperature test unit, the temperature change can be observed in real time, and it can be judged whether the sample has reached the test temperature and whether the cooling time is maintained for 5 minutes when cooling again, so as to control the test temperature more accurately. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0022] Figure 1 It is a structural schematic diagram of the device of the utility model;
[0023] Figure 2 This is a connection schematic diagram of the temperature test unit in the utility model;
[0024] Description of reference numerals:
[0025] 1: sample placement slot; 2: support rod; 3: handle; 4: temperature test unit; 41: processor; 42: temperature receiving module; 43: display; 44: automatic timing module; 45: power module; 5: temperature sensor; 6: hook. DETAILED DESCRIPTION
[0026] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0029] like Figure 1 , 2 As shown, the utility model provides a liquid helium refrigeration ultra-low temperature impact sample transfer device, comprising: a sample placement slot 1, a support rod 2, a handle 3 and a temperature testing unit 4, wherein the sample placement slot 1 is used to hold the sample, the bottom end of the support rod 2 is fixedly connected to one side of the sample placement slot 1, the top end of the support rod 2 is fixedly connected to the handle 3, the temperature testing unit 4 is installed at the end of the handle, and a temperature sensor 5 is provided on one side of the sample placement slot 1, and the temperature sensor 5 is electrically connected to the temperature testing unit 4.
[0030] Specifically, the temperature testing unit 4 includes a processor 41, a temperature receiving module 42, a display 43, an automatic timing module 44 and a power module 45. Among them, the temperature receiving module 42 is electrically connected to the temperature sensor 5 through a wire, and the processor 41 is electrically connected to the temperature receiving module 42, the display 43 and the automatic timing module 44. The processor 41, the temperature receiving module 42, the display 43 and the automatic timing module 44 are all electrically connected to the power module 45, and they are powered by the power module 45. The power module 45 is connected to a power cord, and the power module 45 is configured with a charging interface, through which the power module 45 can be charged, and can also be directly powered by connecting an external power supply through the power cord.
[0031] The temperature sensor 5 can sense the change of the sample temperature in the sample slot 1 in real time, and transmit its signal to the temperature test unit 4 to be received by the temperature receiving module 42. After receiving the signal, the temperature receiving module 42 transmits it to the processor 41 for processing. The processor 41 can be a single-chip microcomputer. The processor 41 can read the time of the automatic timing module 44 and generate temperature and time data or curves for display on the display 43. By observing the temperature change in real time, the control of the test temperature is more accurate, avoiding the failure of the test due to the cooling temperature and time not meeting the specified requirements.
[0032] In this embodiment, a hook 6 is provided at the middle of the support rod 2, and the end of the hook 6 is bent downward. The hook 6 can be used to hang the entire device around the wall of the container, thereby hanging multiple groups of samples. The hook 6 is designed according to the width of the container wall, so that it can be easily removed when hung on the wall and cannot be moved at will. The above structure can prevent the mesh from coming into contact with the air when the mesh is fully raised, and frost from forming between the mesh and the remaining samples, causing the samples to stick to the mesh and making it difficult to remove the samples. Since the utility model device is an independent tooling, it will not affect the remaining samples. At the same time, since the samples are placed independently, there will be no mixing of samples, which makes it difficult to distinguish.
[0033] In this embodiment, the support rod 2 is vertically connected to one side of the sample placement groove 1, baffles are arranged on both sides of the sample placement groove 1, and the baffles are arranged in a U shape. A positioning hole is opened at the bottom of the sample placement groove 1. The position of the sample in the sample placement groove 1 can be fixed by the above structure. The overall height of the device is designed according to the size and height of the tank container to meet the standard requirements. The sample placement groove 1 is designed according to the sample width specified in the standard so that the sample can be properly placed therein and is not easy to tip over.
[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.
Claims
1. A liquid helium refrigeration ultra-low temperature impact sample transfer device, characterized in that: include: A sample placement slot, a support rod, a handle and a temperature testing unit, wherein the bottom end of the support rod is fixedly connected to one side of the sample placement slot, the top end of the support rod is fixedly connected to the handle, the temperature testing unit is installed at the end of the handle, a temperature sensor is provided on one side of the sample placement slot, and the temperature sensor is electrically connected to the temperature testing unit.
2. The liquid helium refrigeration ultra-low temperature impact sample transfer device according to claim 1, characterized in that: The temperature testing unit includes a processor, a temperature receiving module, a display, an automatic timing module and a power supply module.
3. The liquid helium refrigeration ultra-low temperature impact sample transfer device according to claim 2, characterized in that: The temperature receiving module is electrically connected to the temperature sensor via a wire, and the processor is electrically connected to the temperature receiving module, the display and the automatic timing module.
4. The liquid helium refrigeration ultra-low temperature impact sample transfer device according to claim 2, characterized in that: The processor, the temperature receiving module, the display and the automatic timing module are all electrically connected to the power module.
5. The liquid helium refrigeration ultra-low temperature impact sample transfer device according to claim 4, characterized in that: The power module is connected to a power line and is equipped with a charging interface.
6. The liquid helium refrigeration ultra-low temperature impact sample transfer device according to claim 1, characterized in that: A hook is arranged on one side of the support rod.
7. The liquid helium refrigeration ultra-low temperature impact sample transfer device according to claim 1, characterized in that: The support rod is vertically connected to one side of the sample placement groove.
8. The liquid helium refrigeration ultra-low temperature impact sample transfer device according to claim 1, characterized in that: Baffles are arranged on both sides of the sample placement groove.
9. The liquid helium refrigeration ultra-low temperature impact sample transfer device according to claim 8, characterized in that: The baffle is arranged in a U shape.
10. The liquid helium refrigeration ultra-low temperature impact sample transfer device according to claim 1, characterized in that: A positioning hole is provided at the bottom of the sample placement groove.