A low temperature chamber rapid sample changing device

Abstract

The present application discloses a low-temperature cavity rapid sample exchange device, which relates to the technical field of low-temperature detection equipment, wherein a heat-conducting seat is provided in the detection cavity, and a sample transfer channel is provided in the detection cavity. The sample support can carry the sample in and out of the detection cavity through the sample transfer channel. The sample support includes a sample holder and a mounting seat, and the mounting seat is provided with a second connection part; the mounting seat rotates in a first direction relative to the heat-conducting seat, and the first connection part is matched with the second connection part, so that the mounting seat and the heat-conducting seat are locked, and the mounting seat rotates in a second direction relative to the heat-conducting seat, and the first connection part is separated from the second connection part, so that the mounting seat and the heat-conducting seat are unlocked; the valve is used to open or close the sample transfer channel. This solution reduces the problem of inefficiency caused by the limitation of the operating space for changing samples. When taking out the sample, there is no need to heat up the detection cavity and / or the sample support, and when putting in a new sample, there is no need to cool down the detection cavity, which effectively shortens the sample change time and improves the sample change efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of low-temperature detection equipment, and in particular to a low-temperature cavity rapid sample changing device. Background Art

[0002] In scientific research and industrial production, it is very important to detect the performance and characteristics of the sample under test in a low temperature or variable temperature environment. To this end, the existing technology usually uses a low temperature cavity or a vacuum cavity as a detection cavity, and the sample under test is carried by a sample holder arranged in the detection cavity, and the temperature of the sample holder and / or the environment in the detection cavity are controlled to meet the corresponding detection requirements.

[0003] In order to detect the performance of the sample under test at low temperature, the sample under test needs to be cooled to make its temperature reach the temperature required for the test. In the prior art, the coldness of the refrigerant is generally transferred to the sample holder in the test chamber through a heat-conducting structure, so that the sample holder transfers coldness to the sample and the sample under test is kept in a low temperature state; at the same time, in order to prevent the external environment from exchanging heat with the low-temperature sample under test and interfering with the temperature state of the sample under test, the test chamber is usually required to be evacuated.

[0004] For example, a low-temperature magnetic field probe station cooling structure disclosed in patent application number 202321643281.3 transfers cold energy to the sample holder through a cold source component and a cooling component to achieve performance and characteristic detection of the sample under low temperature conditions. After the test sample is tested, it is necessary to remove or replace the test sample. Since the space in the test chamber is usually small and the placement and replacement of the test sample on the sample holder requires manual operation, when replacing the test sample, it is necessary to open the cover of the test chamber for easy operation. In this process, in order to avoid damage to the operator due to low temperature, it is necessary to shut down the entire low-temperature system to restore it to normal temperature; after replacing the test sample, the test chamber needs to be cooled down again to the temperature required for detection, which greatly reduces the detection efficiency. Summary of the invention

[0005] The present application provides a low-temperature cavity rapid sample changing device to solve the current technical problem of taking too long to change the sample to be tested.

[0006] The technical solution adopted in this application is:

[0007] A low-temperature cavity rapid sample exchange device comprises a detection cavity, a sample support and a valve, wherein a heat-conducting seat is arranged in the detection cavity, the heat-conducting seat is provided with a first connecting portion, the detection cavity is provided with a sample transfer channel, the sample support can carry the sample in and out of the detection cavity through the sample transfer channel, the sample support comprises a sample holder and a mounting seat rotatably connected to the sample holder, the mounting seat is provided with a second connecting portion; the mounting seat rotates in a first direction relative to the heat-conducting seat, the first connecting portion cooperates with the second connecting portion, and the mounting seat is locked with the heat-conducting seat; the mounting seat rotates in a second direction relative to the heat-conducting seat, the first connecting portion is separated from the second connecting portion, and the mounting seat is unlocked with the heat-conducting seat, and the valve is used to open or close the sample transfer channel.

[0008] The low temperature chamber rapid sample changing device provided in this application also includes the following additional technical features:

[0009] The low-temperature chamber rapid sample changing device also includes a sample transfer rod, which is used to drive the sample support member in and out of the detection chamber and can drive the mounting seat to rotate so that the mounting seat and the thermal conductive seat are locked or unlocked; the sample transfer rod is detachably connected to the sample support member so that the mounting seat can be locked to the thermal conductive seat and then detached from the sample support member and withdrawn from the detection chamber.

[0010] The sample transfer rod is rotatably matched with the sample holder, the sample transfer rod is provided with an active bevel gear, and the mounting seat is provided with a driven bevel gear. When the sample transfer rod rotates relative to the sample holder, the mounting seat is driven to rotate through the meshing transmission of the active bevel gear and the driven bevel gear.

[0011] The sample transfer rod includes an operating section, a driving section and a rotating section in sequence along the axial direction. The active bevel gear is formed on the outer periphery of the driving section. The sample holder is provided with a rotating hole for rotating with the rotating section. The rotating section is inserted into the rotating hole in the horizontal direction. The central axis of the driven bevel gear extends in the vertical direction.

[0012] The sample holder is provided with a limiting hole connected with the rotating hole, the rotating section is provided with a limiting groove extending in the circumferential direction, a limiting structure is provided in the limiting hole, the limiting structure comprises a connecting piece, an elastic piece and a limiting piece, the connecting piece is relatively fixed to the sample holder, one end of the elastic piece is connected to the connecting piece, and the other end is connected to the limiting piece, the elastic piece can apply a force to the limiting piece, so that the limiting piece cooperates with the limiting groove to make the rotating section and the rotating hole relatively fixed along the axial direction.

[0013] The mounting seat includes an annular top wall and an annular side wall surrounding the annular top wall and extending downwardly, the annular top wall is rotatably sleeved on the sample holder, the first connecting portion is configured as an external thread formed on the thermally conductive seat, and the second connecting portion is configured as an internal thread formed on the annular side wall, and when the external thread and the internal thread are tightened, the top surface of the thermally conductive seat is against the bottom surface of the sample holder in the annular side wall.

[0014] The sample holder is provided with a positioning groove extending in the circumferential direction, the annular top wall is provided with a positioning protrusion adapted to the positioning groove, and the positioning protrusion is embedded in the positioning groove so that the mounting seat and the sample holder are relatively fixed in the axial direction.

[0015] The low-temperature chamber rapid sample changing device also includes a sample changing chamber. When the valve closes the sample transfer channel, the detection chamber is isolated from the sample changing chamber. When the valve opens the sample transfer channel, the sample transfer channel connects the detection chamber with the sample changing chamber. The sample changing chamber is provided with a sample changing port that can be opened or closed. The sample holder and the sample enter and exit the sample changing chamber through the sample changing port, and enter and exit the detection chamber through the sample transfer channel in the sample changing chamber.

[0016] The sample exchange chamber opens or closes the sample exchange port through a door body. When the door body closes the sample exchange port and the valve closes the sample transfer channel, the sample exchange chamber and the detection chamber are respectively sealed as vacuum-evacuable closed cavities, and the valve is configured as a gate valve.

[0017] The top and / or side of the detection cavity is provided with a transparent observation window.

[0018] Due to the adoption of the above technical solution, the technical effects achieved by this application include at least:

[0019] 1. The low-temperature cavity rapid sample changing device provided in the present application, the detection cavity can be used as a closed cavity for testing the performance and characteristics of samples under low temperature and / or vacuum environment, and a heat conductive seat is provided in the detection cavity, which can be connected to a cold source and transfer cold energy to the sample support, so as to cool down or control the temperature of the sample being tested by cooling the sample support, so as to achieve a low temperature effect for the sample being tested. In this solution, the detection chamber is provided with a sample transfer channel connected to the outside. The sample holder can carry the sample in and out of the detection chamber through the sample transfer channel. The sample holder can be locked or unlocked through the mounting seat and the thermal seat, so that after the previous sample is tested at low temperature, the valve can be opened and the mounting seat and the thermal seat can be operated to unlock. The sample holder and the tested sample are then removed from the thermal seat and taken out of the detection chamber through the sample transfer channel. The replaced sample and sample holder are then replaced into the detection chamber, eliminating the need for operators to replace samples in the detection chamber, reducing the problem of inefficiency caused by the limitation of the operating space for sample replacement, and avoiding equipment damage due to the operation of sample replacement. At the same time, the operator will not suffer frostbite from touching the detection chamber and / or the sample holder, which greatly shortens the sample replacement time and improves the sample replacement efficiency. The mounting seat and the thermally conductive seat are unlocked or locked by relative rotation of the first connecting part and the second connecting part, and a wide range of options are available for driving the mounting seat to rotate relative to the thermally conductive seat, which helps to select a low-cost, reliable, easy-to-operate, and ergonomic method to drive the mounting seat to rotate. In addition, the mounting seat and the thermally conductive seat are locked to achieve relative fixation, which helps to place the sample to be tested and other objects that need to be placed on the sample holder for auxiliary detection stably, and can also ensure that the process of the tool used to send the sample support into the detection chamber and lock it away from the sample support will not drive the sample support to separate from the thermally conductive seat. Furthermore, through the reliable locking of the mounting seat and the thermally conductive seat, the two are closely fitted and the matching gap is reduced, which helps to improve the efficiency and effect of cold transfer from the thermally conductive seat to the sample support, reduce the temperature difference between the two, and thus facilitate the control of the temperature of the sample support and the sample to be tested it carries, thereby helping to improve the temperature control accuracy and temperature adjustment efficiency. In addition, the mounting seat and the sample holder are in a rotational connection relationship, so that when the mounting seat is rotated to unlock or lock, the sample holder can maintain a relatively fixed posture, ensuring the stability of the sample position and effectively preventing the sample from falling off due to the rotation of the sample holder with the mounting seat. After the sample holder is fixed in the detection chamber, the valve is controlled to close the sample transfer channel to form a closed cavity in the detection chamber. In a feasible manner, it is convenient to maintain a low-temperature vacuum environment in the detection chamber or re-form a low-temperature vacuum environment to prevent the external environment of the detection chamber from affecting the environment of the sample inside the detection chamber, and to facilitate the detection of sample performance and characteristics under low temperature and / or vacuum conditions.

[0020] 2. As a preferred method of the present application, the sample transfer rod is used to drive the sample holder in and out of the detection chamber and can drive the mounting seat to rotate so that the mounting seat and the thermal conductive seat are locked or unlocked, replacing the existing operation method in which the operator puts his hand into the detection chamber to achieve sample replacement, avoiding the risk of low-temperature damage, and improving the convenience of operation and sample replacement efficiency. Moreover, the sample transfer rod is more resistant to low temperatures than the human body, so that there is no need to heat the sample to a temperature range that the human body can touch, and the sample holder and the sample in a relatively low temperature state can be taken out of the detection chamber through the sample transfer rod, and there is no need to heat the sample, further improving the sample replacement efficiency. The sample holder can be directly put into and out of the detection chamber by the sample transfer rod outside the detection chamber, and the mounting seat and the thermal conductive seat can be driven to lock or unlock by the sample transfer rod, realizing the integration of multiple functions on the sample transfer rod, which helps to simplify the structure of the sample replacement device and improve the sample replacement efficiency. The sample transfer rod is detachably connected to the sample holder, so that after the sample for the next round of detection and another sample holder are replaced in the detection chamber, the sample transfer rod can be withdrawn from the detection chamber to avoid interfering with the detection process. The valve is also allowed to close the sample transfer channel to facilitate the realization of a low temperature and / or vacuum environment in the detection chamber through technology.

[0021] 3. As a preferred method of the present application, the sample transfer rod rotates with the sample holder, and when rotating relative to the sample holder, the mounting seat is driven to rotate through the meshing transmission of the active bevel gear and the driven bevel gear. Therefore, the mounting seat and the heat-conducting seat can be unlocked or locked by only controlling the rotation of the sample transfer rod, which improves the convenience of operation and sample changing efficiency. Moreover, the sample transfer rod rotates relative to the sample holder and still allows the sample holder to maintain a relatively fixed posture, and does not cause the sample holder to rotate and generate centrifugal force that causes the sample to separate from the sample holder. The meshing transmission of the active bevel gear and the driven bevel gear is stable and reliable, does not cause shaking in other directions, and is also relatively friendly to the stability of the sample placed on the sample holder. In addition, the central axes of the active bevel gear and the driven bevel gear in the meshing state are generally in a vertical relationship. Therefore, the sample changing operation process can be optimized by utilizing this vertical relationship. For example, the central axis of the active bevel gear set on the sample transfer rod is along the horizontal direction, and the central axis of the driven bevel gear set on the mounting seat is along the vertical direction. Through this design, it is convenient for the sample transfer rod to enter and exit the detection cavity in the horizontal direction, and the convenience of rotation is improved, and the mounting seat can be locked or unlocked with the heat conductive seat in the vertical direction during rotation, which is convenient for the disassembly and assembly of the sample support.

[0022] 4. As a preferred embodiment of the present application, the first connecting portion is set as an external thread and the second connecting portion is set as an internal thread. When the sample transfer rod drives the mounting seat to rotate along a first direction, the mounting seat and the thermal conductive seat threads are tightened to achieve locking, thereby ensuring the reliability of the locking of the two. Moreover, the engagement of the external thread and the internal thread can effectively increase the matching area of ​​the mounting seat and the thermal conductive seat, thereby helping to increase the heat transfer area, helping to improve the efficiency and effect of cold transfer from the thermal conductive seat to the sample support, reducing the temperature difference between the two, and improving the temperature control accuracy; when the mounting seat is driven to rotate in a second direction opposite to the first direction, the mounting seat and the thermal conductive seat threads are loosened to achieve unlocking. When the external thread and the internal thread are tightened, the top surface of the thermal seat is against the bottom surface of the sample holder in the annular side wall. On the one hand, it provides a hand feeling prompt that the mounting seat and the thermal seat have been screwed into place. On the other hand, the thermal seat can also be used to provide reliable support for the sample holder to prevent the bottom surface of the sample holder from being suspended in the air. In addition, the direct contact between the top surface of the thermal seat and the bottom surface of the sample holder can also enable the cold source to directly transfer cold to the sample holder through the thermal seat, so that the temperature of the sample holder can be reliably and accurately controlled, and the sample holder can be quickly cooled to the temperature required for sample detection.

[0023] 5. As a preferred embodiment of the present application, the sample holder and the sample enter and exit the sample exchange chamber through the sample exchange port, and enter and exit the detection chamber through the sample transfer channel in the sample exchange chamber. When it is necessary to replace the sample and the sample holder that participated in the previous round of detection in the detection chamber, the sample exchange chamber and the detection chamber can be kept in the same chamber environment (such as the same air pressure environment, the same temperature environment, etc.) in advance by technical means, and then the valve is opened to unlock the mounting seat and the heat-conducting seat through the sample transfer rod, and then the sample holder and the sample are taken out from the detection chamber to the sample exchange chamber. Because the sample exchange chamber and the detection chamber have the same chamber environment , so that the environment in the detection chamber will basically not change when the valve is opened. After the sample holder and the sample enter the sample changing chamber, the valve is controlled to be closed to avoid the outside atmosphere affecting the environment in the detection chamber when the sample changing port is opened. After the sample changing port is opened, the sample is taken out of the sample changing chamber. At this time, the next sample can be placed in the sample changing chamber, and then the sample changing port is closed to convert the sample changing chamber to the same chamber environment as the detection chamber. Then the valve is controlled to open, and the sample and the sample holder are sent into the detection chamber through the sample transfer rod, and then the mounting seat and the heat transfer seat are locked. Finally, the sample transfer rod is withdrawn from the detection chamber and the valve is closed. Therefore, by designing the sample changing chamber, the chamber environment in the detection chamber will basically not change during the entire sample changing process, eliminating the existing process of opening the cover of the detection chamber to change the sample and re-vacuuming. After replacing the next sample and the sample holder, the detection process can be quickly entered, effectively improving the sample changing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0025] Figure 1 A schematic diagram of a low-temperature chamber rapid sample changing device provided in an embodiment of the present application;

[0026] Figure 2 An assembly diagram of the sample transfer rod, heat-conducting seat and sample support provided in the embodiment of the present application;

[0027] Figure 3 A cross-sectional view of an assembly formed by a sample transfer rod, a heat-conducting seat and a sample support provided in an embodiment of the present application;

[0028] Figure 4 A cross-sectional view of an assembly formed by a sample transfer rod, a heat-conducting seat, a sample support member and a limiting structure provided in an embodiment of the present application;

[0029] Figure 5 A schematic diagram of the structure of a sample support provided in an embodiment of the present application;

[0030] Figure 6 A cross-sectional view of an assembly component formed by a sample support and a limiting structure provided in an embodiment of the present application;

[0031] Figure 7 A cross-sectional view of a sample holder provided in an embodiment of the present application;

[0032] Figure 8 A schematic diagram of the structure of the sample transfer rod provided in the embodiment of the present application;

[0033] Fig. 9 A schematic diagram of the structure of the sample holder provided in the embodiment of the present application;

[0034] Fig.10 A schematic diagram of the structure of the mounting base provided in the embodiment of the present application;

[0035] Fig.11 This is a schematic diagram of the structure of the thermally conductive seat provided in an embodiment of the present application.

[0036] List of parts and reference numerals:

[0037] 1 detection chamber, 11 sample transfer channel, 12 observation window;

[0038] 2 heat conducting seat, 21 external thread, 22 step surface;

[0039] 3 sample support, 31 sample support, 311 rotation hole, 312 limiting hole, 313 positioning groove, 32 mounting seat, 321 annular top wall, 3211 driven bevel gear, 3212 positioning protrusion, 322 annular side wall, 3221 internal thread;

[0040] 4 valves;

[0041] 5, a sample transfer rod, 51, an operating section, 52, a driving section, 521, a driving bevel gear, 53, a rotating section, 531, a limiting groove;

[0042] 61 connecting member, 62 elastic member, 63 limiting member;

[0043] 7 a sample changing cavity, 71 a through hole, 72 a sample changing port;

[0044] 8 doors. DETAILED DESCRIPTION

[0045] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0046] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0047] In addition, in the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "lateral", "longitudinal", etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0048] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0050] In the embodiment of the present application, a low temperature chamber rapid sample changing device is provided. For the convenience of explanation and understanding, the following contents provided in the present application are all described on the basis of the illustrated product structure. Of course, those skilled in the art can understand that the above structure is only used as a specific example and schematic description, and cannot constitute a specific limitation on the technical solution provided in the present application.

[0051] like Figures 1 to 11 As shown, a low-temperature cavity rapid sample changing device provided in the present application comprises a detection cavity 1, a sample supporting member 3 and a valve 4, a heat conducting seat 2 is provided in the detection cavity 1, the heat conducting seat 2 is provided with a first connecting portion, the detection cavity 1 is provided with a sample transfer channel 11, the sample supporting member 3 can carry the sample in and out of the detection cavity 1 through the sample transfer channel 11, the sample supporting member 3 comprises a sample holder 31 and a mounting seat 32 rotatably connected to the sample holder 31, the mounting seat 32 is provided with a second connecting portion; the mounting seat 32 rotates relative to the heat conducting seat 2 along a first direction to match the first connecting portion with the second connecting portion, thereby locking the mounting seat 32 with the heat conducting seat 2; the mounting seat 32 rotates relative to the heat conducting seat 2 along a second direction to separate the first connecting portion from the second connecting portion, thereby unlocking the mounting seat 32 with the heat conducting seat 2, and the valve 4 is used to open or close the sample transfer channel 11.

[0052] The low-temperature cavity rapid sample changing device provided in the present application, the detection cavity 1 can be used as a closed cavity for performing performance and characteristic testing of samples under low temperature and / or vacuum environment, a thermal conductive seat 2 is provided in the detection cavity 1, the thermal conductive seat 2 can be connected to a cold source and transfer cold energy to a sample support 3, the cold source transfers the cold energy to the thermal conductive seat 2, and the thermal conductive seat 2 transfers the cold energy to the sample support 3, so as to cool down or control the temperature of the sample to be tested by cooling the sample support 3, so as to achieve a low temperature effect of the sample to be tested.

[0053] In this solution, the detection chamber 1 is provided with a sample transfer channel 11 connected to the outside. The sample holder 3 can carry the sample in and out of the detection chamber 1 through the sample transfer channel 11. The sample holder 3 can be locked or unlocked with the heat-conducting seat 2 through the mounting seat 32, so that after the previous sample is tested at low temperature, the valve 4 can be opened and the mounting seat 32 can be operated to unlock the heat-conducting seat 2, and then the sample holder 3 and the tested sample are removed from the heat-conducting seat 2 and taken out of the detection chamber 1 through the sample transfer channel 11, and then the replaced sample and the sample holder 3 are replaced into the detection chamber 1, eliminating the need for operators to enter the detection chamber 1. The operation of replacing samples can avoid frost on the inside of the detection chamber 1 caused by replacing samples in the detection chamber 1 in a low-temperature state, thereby avoiding equipment damage such as damage to the electrical connectors in the detection chamber 1 and corrosion of the metal surface. It can also reduce the inefficiency caused by the limitation of the operating space for replacing samples. At the same time, the operator will not suffer frostbite from touching the detection chamber 1 and / or the sample support 3. There is no need to heat up the detection chamber 1 and / or the sample support 3 when taking out the sample, and there is no need to cool down the detection chamber 1 when putting in a new sample, which greatly shortens the sample replacement time and improves the sample replacement efficiency.

[0054] The mounting seat 32 and the heat-conducting seat 2 are unlocked or locked by the relative rotation of the first connecting part and the second connecting part. The method for driving the mounting seat 32 to rotate relative to the heat-conducting seat 2 is highly selective, which helps to select a low-cost, reliable, easy-to-control, and ergonomic method to drive the mounting seat 32 to rotate. For example, the mounting seat 32 can be driven to rotate by a motor or by manual drive and transmission mechanism. In addition, the mounting seat 32 and the heat-conducting seat 2 are locked to achieve relative fixation, which helps to place the sample to be tested steadily, and can also ensure that the process of the tool used to send the sample support 3 into the detection chamber 1 and lock it away from the sample support 3 will not drive the sample support 3 away from the heat-conducting seat 2. Moreover, through the reliable locking of the mounting seat 32 and the heat-conducting seat 2, the two are closely fitted, the matching gap is reduced, which helps to improve the efficiency and effect of cold transfer from the heat-conducting seat 2 to the sample support 3, reduce the temperature difference between the two, and then facilitate the control of the temperature of the sample support 3 and the sample to be tested carried by it, thereby helping to improve the temperature control accuracy and temperature adjustment efficiency. It should be noted that the present application does not limit the manner of rotational locking cooperation between the first connection portion and the second connection portion. For example, threaded cooperation, rotational snap-fit ​​cooperation, etc. may be adopted.

[0055] In addition, the mounting seat 32 and the sample holder 31 are also in a rotational connection relationship, so that when the mounting seat 32 rotates to unlock or lock, the sample holder 31 can maintain a relatively fixed posture, ensuring the stability of the sample position, and effectively preventing the sample from being thrown off due to the rotation of the sample holder 31 with the mounting seat 32. After the sample holder 3 is fixed in the detection chamber 1, the valve 4 is controlled to close the sample transfer channel 11, so that the detection chamber 1 forms a closed cavity. In a feasible manner, it is convenient to maintain a low-temperature vacuum environment in the detection chamber 1 or re-form a low-temperature vacuum environment to prevent the external environment of the detection chamber 1 from affecting the environment of the sample inside the detection chamber 1, so as to facilitate the detection of sample performance and characteristics under low temperature and / or vacuum conditions.

[0056] As a preferred implementation of the present application, Figures 1 to 4As shown, the low-temperature chamber rapid sample changing device also includes a sample transfer rod 5, which is used to drive the sample support 3 in and out of the detection chamber 1 and can drive the mounting seat 32 to rotate so that the mounting seat 32 and the thermal conductive seat 2 are locked or unlocked; the sample transfer rod 5 is detachably connected to the sample support 3 so that the mounting seat 32 can be locked to the thermal conductive seat 2 and then detached from the sample support 3 and withdrawn from the detection chamber 1. When changing samples, it is necessary to first carry out the sampling stage and then the sample placement stage. In the sampling stage, the sample transfer rod 5 needs to be extended into the detection chamber 1 through the sample transfer channel 11 to first unlock the mounting seat 32 and the thermal conductive seat 2, and then the sample support 3 and the sample are taken out through the sample transfer channel 11. At this time, the sample placement stage can be carried out. Specifically, the sample support 3 and the sample participating in the next round of detection are installed on the sample transfer rod 5 outside the detection chamber 1, and finally, the sample transfer rod 5 drives the sample support 3 and the sample into the detection chamber 1 through the sample transfer channel 11 and locks the mounting seat 32 and the thermal conductive seat 2, and then the sample transfer rod 5 is withdrawn from the detection chamber 1. It can be understood by those skilled in the art that the sample transfer rod 5 is used to drive the sample support 3 in and out of the detection chamber 1 and can drive the mounting seat 32 to rotate so that the mounting seat 32 and the thermal conductive seat 2 are locked or unlocked, replacing the existing operation mode in which the operator puts his hand into the detection chamber 1 to achieve sample replacement, avoiding the risk of low temperature damage, and improving the convenience of operation and sample replacement efficiency. Moreover, the sample transfer rod 5 is more resistant to low temperatures than the human body, so that the sample support 3 and the sample in a relatively low temperature state can be taken out of the detection chamber 1 through the sample transfer rod 5 without heating the sample to a temperature range that the human body can touch, and the sample heating process of the sample is not required, further improving the sample replacement efficiency. The sample support 3 is directly transferred to and from the detection chamber 1 through the sample transfer rod 5 outside the detection chamber 1, and the mounting seat 32 can be driven to lock or unlock with the thermal conductive seat 2 through the sample transfer rod 5, realizing the integration of multiple functions on the sample transfer rod 5, which helps to simplify the structure of the sample replacement device and improve the sample replacement efficiency. The sample transfer rod 5 is detachably connected to the sample holder 3, so that after the sample for the next round of detection and another sample holder 3 are replaced in the detection chamber 1, the sample transfer rod 5 can be withdrawn from the detection chamber 1 to avoid interfering with the detection process. The valve 4 is also allowed to close the sample transfer channel 11, so as to achieve a low temperature and / or vacuum environment in the detection chamber 1 through technology.

[0057] Furthermore, if Figure 2 , Figure 8 and Fig.10As shown, the sample transfer rod 5 is rotatably matched with the sample holder 31, the sample transfer rod 5 is provided with an active bevel gear 521, and the mounting seat 32 is provided with a driven bevel gear 3211. When the sample transfer rod 5 rotates relative to the sample holder 31, the mounting seat 32 is driven to rotate by the meshing transmission of the active bevel gear 521 and the driven bevel gear 3211. It can be understood by those skilled in the art that when the sample transfer rod 5 rotates relative to the sample holder 31, the mounting seat 32 is driven to rotate by the meshing transmission of the active bevel gear 521 and the driven bevel gear 3211. Therefore, the mounting seat 32 and the heat conducting seat 2 can be unlocked or locked by only controlling the rotation of the sample transfer rod 5, which improves the convenience of operation and the sample changing efficiency. Moreover, the sample transfer rod 5 rotates relative to the sample holder 31, and the sample holder 31 is still allowed to maintain a relatively fixed posture, and the sample holder 31 will not generate a centrifugal force that causes the sample to be separated from the sample holder 31 as it rotates. The meshing transmission between the active bevel gear 521 and the driven bevel gear 3211 is stable and reliable, and will not produce shaking in other directions, which is also friendly to the stability of the sample placed on the sample holder 31. In addition, the central axes of the active bevel gear 521 and the driven bevel gear 3211 in the meshing state are generally in a vertical relationship. Therefore, the sample changing operation process can be optimized by using this vertical relationship. For example, the central axis of the active bevel gear 521 set on the sample transfer rod 5 is in the horizontal direction, and the central axis of the driven bevel gear 3211 set on the mounting seat 32 is in the vertical direction. Through this design, it is convenient for the sample transfer rod 5 to enter and exit the detection chamber 1 in the horizontal direction, and the convenience of rotation is improved, and the mounting seat 32 is locked or unlocked with the heat conductive seat 2 in the vertical direction during the rotation process, which is convenient for the sample support 3 to be disassembled and assembled.

[0058] Furthermore, if Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, the sample transfer rod 5 includes an operating section 51, a driving section 52 and a rotating section 53 in sequence along the axial direction, and an active bevel gear 521 is formed on the outer periphery of the driving section 52. The sample holder 31 is provided with a rotating hole 311 for rotating with the rotating section 53. The rotating section 53 is inserted into the rotating hole 311 in the horizontal direction, and the central axis of the driven bevel gear 3211 extends in the vertical direction. Specifically, in the process of taking out the sample from the detection chamber 1 and putting the sample into the detection chamber 1, the rotating section 53 needs to be inserted into the rotating hole 311 of the sample holder 31. When the rotating section 53 is inserted into the rotating hole 311, the active bevel gear 521 and the driven bevel gear 3211 are just in a meshing state, and the active bevel gear 521 can drive the driven bevel gear 3211 to rotate by rotating the sample transfer rod 5, thereby driving the mounting seat 32 to rotate relative to the sample holder 31. The operating section 51 is convenient for the testing personnel to hold the operating section 51 outside the testing cavity 1 to control the sample transfer rod 5 to enter and exit the testing cavity 1 and to rotate in two opposite directions, thereby improving the convenience of operation.

[0059] In some cases, a slide groove may be provided on the sample transfer rod 5 to prevent the sample transfer rod 5 from rotating when the sample transfer rod 5 drives the sample support 3 to move, thereby preventing the sample from falling off due to the rotation of the sample support 3 during the movement.

[0060] Further, in order to ensure the stability of the rotating section 53 after being inserted into the rotating hole 311, in a preferred embodiment, Figure 4 , Figure 6 , Figure 7 and Figure 8 As shown, the sample holder 31 is provided with a limiting hole 312 connected to the rotating hole 311, the rotating section 53 is provided with a limiting groove 531 extending in the circumferential direction, and a limiting structure is provided in the limiting hole 312. The limiting structure includes a connecting member 61, an elastic member 62 and a limiting member 63. The connecting member 61 is relatively fixed to the sample holder 31, one end of the elastic member 62 is connected to the connecting member 61, and the other end is connected to the limiting member 63. The elastic member 62 can apply a force to the limiting member 63, so that the limiting member 63 cooperates with the limiting groove 531 to make the rotating section 53 and the rotating hole 311 relatively fixed along the axial direction. Specifically, before the rotating section 53 is inserted into the rotating hole 311, the limiting member 63 at least partially extends into the rotating hole 311 from the limiting hole 312 under the action of the elastic member 62. During the process of inserting the rotating section 53 into the rotating hole 311, the limiting member 63 is first pushed to retract into the limiting hole 312 until the rotating section 53 completely enters the rotating hole 311, so that the limiting member 63 is directly opposite to the limiting groove 531 on the rotating section 53. At this time, the elastic member 62 pushes the limiting member 63 into the limiting groove 531, thereby applying a force to limit the axial movement of the rotating section 53, forming an axial limit on the rotating section 53, preventing the rotating section 53 from easily and arbitrarily disengaging from the rotating hole 311, and ensuring that the sample transfer rod 5 is relatively fixed axially with the rotating hole 311 during rotation. Only when the rotating section 53 is operated to force the limiting member 63 to be retracted into the limiting hole 312 again and disengage from the limiting groove 531, can the rotating section 53 be drawn out of the rotating hole 311. Specifically, the elastic member 62 may be a spring, both ends of which are respectively connected to the connecting member 61 and the limiting member 63 . The connecting member 61 may be relatively fixed to the sample holder 31 in the limiting hole 312 by means of threaded fit, snap fit, interference fit, etc.

[0061] As a preferred implementation of the present application, Figure 6 , Figure 7 , Fig.10 and Fig.11As shown, all the aforementioned embodiments and examples of the present application can further enable the mounting seat 32 to include an annular top wall 321 and an annular side wall 322 surrounding the annular top wall 321 and extending downwardly, the annular top wall 321 can be rotatably sleeved on the sample holder 31, the first connecting portion is configured as an external thread 21 formed on the thermal seat 2, and the second connecting portion is configured as an internal thread 3221 formed on the annular side wall 322, and when the external thread 21 and the internal thread 3221 are tightened, the top surface of the thermal seat 2 is against the bottom surface of the sample holder 31 in the annular side wall 322. Specifically, the top of the thermal seat 2 can be set as a threaded column with an external thread 21, and the thermal seat 2 is provided with a step surface 22 surrounding the threaded column. During the screwing process of the external thread 21 and the internal thread 3221, when the annular side wall 322 and the step surface 22 abut against each other, it means that the external thread 21 and the internal thread 3221 have been tightened. In some cases, the thermal seat 2 and the sample support 3 can also be configured so that the top plane of the threaded column with the external thread 21 of the thermal seat 2 at this time abuts against the bottom surface of the sample support 31 located in the annular side wall 322. Those skilled in the art can understand that, the first connection portion is set as an external thread 21, and the second connection portion is set as an internal thread 3221. When the sample transfer rod 5 drives the mounting seat 32 to rotate along a first direction, the mounting seat 32 and the thermal conductive seat 2 are screwed together to achieve locking, thereby ensuring the reliability of the locking of the two. Moreover, the engagement of the external thread 21 and the internal thread 3221 can effectively increase the matching area of ​​the mounting seat 32 and the thermal conductive seat 2, thereby helping to increase the heat transfer area, helping to improve the efficiency and effect of cold transfer from the thermal conductive seat 2 to the sample support 3, reducing the temperature difference between the two, and improving the temperature control accuracy; when the mounting seat 32 is driven to rotate in a second direction opposite to the first direction, the mounting seat 32 and the thermal conductive seat 2 are screwed together to achieve unlocking. When the external thread 21 and the internal thread 3221 are tightened, the top surface of the thermal seat 2 is against the bottom surface of the sample holder 31 in the annular side wall 322. On the one hand, it provides a hand feeling prompt that the mounting seat 32 and the thermal seat 2 have been screwed into place. On the other hand, the thermal seat 2 can also be used to provide reliable support for the sample holder 31 to prevent the bottom surface of the sample holder 31 from being suspended in the air. In addition, the direct contact between the top surface of the thermal seat 2 and the bottom surface of the sample holder 31 can also enable the cold source to directly transfer cold to the sample holder 31 through the thermal seat 2, so that the temperature of the sample holder 31 can be reliably and accurately controlled, so that the sample holder 31 can be quickly cooled to the temperature required for sample detection.

[0062] Furthermore, if Figure 6 , Figure 7 and Fig. 9 As shown, the sample holder 31 is provided with a positioning groove 313 extending in the circumferential direction, and the annular top wall 321 is provided with a positioning protrusion 3212 adapted to the positioning groove 313. The positioning protrusion 3212 is embedded in the positioning groove 313 to relatively fix the mounting seat 32 and the sample holder 31 in the axial direction, thereby avoiding relative movement of the sample holder 31 and the mounting seat 32 in the axial direction and ensuring that the two are reliably and stably rotationally connected together.

[0063] As a preferred implementation of the present application, Figure 1 As shown, all the aforementioned embodiments and examples of the present application can further enable the low-temperature chamber rapid sample changing device to include a sample changing chamber 7. When the valve 4 closes the sample transfer channel 11, the detection chamber 1 is isolated from the sample changing chamber 7. When the valve 4 opens the sample transfer channel 11, the sample transfer channel 11 connects the detection chamber 1 with the sample changing chamber 7. The sample changing chamber 7 has a sample changing port 72 that can be opened or closed. The sample holder 3 and the sample enter and exit the sample changing chamber 7 through the sample changing port 72, and enter and exit the detection chamber 1 through the sample transfer channel 11 in the sample changing chamber 7. Specifically, taking the technical solution of driving the sample holder 3 to enter and exit the detection chamber 1 through the sample transfer rod 5 and driving the mounting seat 32 to rotate as an example, as shown in FIG. Figure 1 As shown, a through hole 71 for inserting the sample transfer rod 5 can be provided on the wall of the sample exchange chamber 7, and the through hole 71 is arranged opposite to the sample exchange channel. The sample transfer rod 5 can slide along the through hole 71 and carry the sample holder 3 and the sample into and out of the detection chamber 1 through the sample transfer channel 11. It can be understood by those skilled in the art that, through this design, when it is necessary to replace the sample and the sample holder 3 participating in the previous round of detection in the detection chamber 1, the sample exchange chamber 7 and the detection chamber 1 can be kept in the same chamber environment (for example, the same air pressure environment, the same temperature environment, etc.) in advance by technical means, and then the valve 4 is opened to allow the sample transfer rod 5 to enter the detection chamber 1, and the mounting seat 32 is unlocked from the heat-conducting seat 2, and the sample holder 3 and the sample are taken out from the detection chamber 1 to the sample exchange chamber 7. Because the sample exchange chamber 7 and the detection chamber 1 have the same chamber environment, the environment in the detection chamber 1 is basically not affected when the valve 4 is opened. The sample changing chamber 7 changes due to the influence of the sample changing chamber 7. After the sample holder 3 and the sample enter the sample changing chamber 7, the valve 4 is controlled to be closed to prevent the outside atmosphere from affecting the environment in the detection chamber 1 when the sample changing port 72 is opened. After the sample changing port 72 is opened, the sample is taken out of the sample changing chamber 7. At this time, the next sample can be placed in the sample changing chamber 7. After the sample changing port 72 is closed, the sample changing chamber 7 is converted to the same chamber environment as the detection chamber 1. Then the valve 4 is controlled to open, and the sample and the sample holder 3 are sent into the detection chamber 1 through the sample transfer rod 5, and then the mounting seat 32 and the heat transfer seat 2 are locked. Finally, the sample transfer rod 5 is withdrawn from the detection chamber 1 and the valve 4 is closed. Therefore, by designing the sample changing chamber 7, the chamber environment in the detection chamber 1 will basically not change during the entire sample changing process, eliminating the existing process of opening the cover of the detection chamber to change the sample and re-vacuuming, and effectively improving the sample changing efficiency. In some cases, the original sample changing time of 5-7 hours can be shortened to about 2 hours, greatly improving the sample changing efficiency.

[0064] Furthermore, if Figure 1As shown, the sample changing chamber 7 opens or closes the sample changing port 72 through the door body 8. When the door body 8 closes the sample changing port 72 and the valve 4 closes the sample transfer channel 11, the sample changing chamber 7 and the detection chamber 1 are respectively sealed as a closed chamber that can be evacuated, and the valve 4 is set as a gate valve. It can be understood by those skilled in the art that, when the door body 8 closes the sample changing port 72, only the valve 4 needs to be closed to simultaneously achieve the isolation and closure of the detection chamber 1 and the sample changing chamber 7, thereby achieving the functional integration of the valve 4 and simplifying the structure of the sample changing device. Specifically, the sample changing chamber 7 can be installed as a whole on the outer wall of the detection chamber 1, and the edge of the sample changing chamber 7 is sealed with the outer wall of the detection chamber 1. A sealing structure is also provided between the sample transfer rod 5 and the through hole 71 to isolate the outside atmosphere from the sample changing chamber 7. The detection chamber 1 is sealed as a vacuum-evacuable closed chamber, so that the detection chamber 1 can be tested under a vacuum environment to prevent the external atmosphere from interfering with the detection process; the sample exchange chamber 7 is sealed as a vacuum-evacuable closed chamber to optimize the sample exchange process. In the process of moving the sample and the sample support 3 from the detection chamber 1 into the sample exchange chamber 7 and in the process of moving the sample and the sample support 3 from the sample exchange chamber 7 into the detection chamber 1, the sample exchange chamber 7 and the detection chamber 1 can be kept in the same vacuum environment in advance by technical means, so that when the valve 4 is opened, the environment in the detection chamber 1 will not be affected by the sample exchange chamber 7 and change, thereby helping to improve the sample exchange efficiency. The valve 4 is a gate valve, which can well seal the detection chamber 1 and the sample exchange chamber 7 after closing the sample transfer channel 11.

[0065] As a preferred embodiment, a transparent observation window 12 may be provided on the top and / or side of the detection chamber 1, for example, Figure 1 As shown, an embodiment in which an observation window 12 is provided on the top of the detection chamber 1 is schematically illustrated, and the observation window 12 can be made of transparent glass, transparent plastic or other light-transmitting materials. By providing the transparent observation window 12, on the one hand, it is convenient to observe the state change of the sample during the detection process, and on the other hand, through the observation window 12, it is convenient to observe whether the rotating section 53 of the sample transfer rod 5 is inserted into the rotating hole 311 on the sample holder 31 during sampling, and whether the mounting seat 32 and the thermal conductive seat 2 are unlocked in place by the rotation of the sample transfer rod 5. It is also convenient to observe whether the mounting seat 32 and the thermal conductive seat 2 are locked in position by the rotation of the sample transfer rod 5 during sample placement, which improves the convenience of sample change and avoids the difficulty of sample change due to sample change without field of view.

[0066] In some cases, a corresponding detection device that uses light as a detection means may be arranged at the observation window 12. For example, a magneto-optical Kerr detection device may be arranged at the observation window 12 and the detection light may enter and exit the detection cavity 1 through the observation window 12. Other detection devices may be further arranged inside the detection cavity 1, and the positional relationship between the corresponding detection device and the object to be measured may be observed through the observation window 12. For example, a probe detection device may be further arranged inside the detection cavity 1, and the contact position and contact state of the probe and the object to be measured may be observed through the observation window 12.

[0067] In some cases, a displacement device may be provided to drive the heat-conducting seat 2 to move, thereby facilitating the cooperation between the sample support 3 and the heat-conducting seat 2 .

[0068] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0069] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0070] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A low temperature chamber rapid sample changing device, characterized in that: include: A detection chamber, wherein a heat-conducting seat is provided in the detection chamber, the heat-conducting seat is provided with a first connecting portion, and the detection chamber is provided with a sample transfer channel; A sample support, the sample support can carry the sample into and out of the detection chamber through the sample transfer channel, the sample support includes a sample holder and a mounting seat rotatably connected to the sample holder, the mounting seat is provided with a second connection portion; the mounting seat rotates relative to the heat-conducting seat in a first direction, the first connection portion is matched with the second connection portion, and the mounting seat is locked with the heat-conducting seat; the mounting seat rotates relative to the heat-conducting seat in a second direction, the first connection portion is separated from the second connection portion, and the mounting seat is unlocked from the heat-conducting seat; A valve, the valve is used to open or close the sample transfer channel; A sample transfer rod, the sample transfer rod is used to drive the sample support member in and out of the detection chamber, the sample transfer rod and the sample support are rotatably matched, the sample transfer rod is provided with an active bevel gear, and the mounting seat is provided with a driven bevel gear. When the sample transfer rod rotates relative to the sample support, the mounting seat is driven to rotate through the meshing transmission of the active bevel gear and the driven bevel gear, so that the mounting seat is locked or unlocked with the thermal conductive seat; the sample transfer rod and the sample support member are detachably connected, so that the mounting seat can be locked to the thermal conductive seat and then detached from the sample support member and withdrawn from the detection chamber.

2. The low-temperature chamber rapid sample changing device according to claim 1, characterized in that: The sample transfer rod includes an operating section, a driving section and a rotating section in sequence along the axial direction. The active bevel gear is formed on the outer periphery of the driving section. The sample holder is provided with a rotating hole for rotating with the rotating section. The rotating section is inserted into the rotating hole in the horizontal direction. The central axis of the driven bevel gear extends in the vertical direction.

3. The low temperature chamber rapid sample changing device according to claim 2, characterized in that: The sample holder is provided with a limiting hole connected with the rotating hole, the rotating section is provided with a limiting groove extending in the circumferential direction, a limiting structure is provided in the limiting hole, the limiting structure comprises a connecting piece, an elastic piece and a limiting piece, the connecting piece is relatively fixed to the sample holder, one end of the elastic piece is connected to the connecting piece, and the other end is connected to the limiting piece, the elastic piece can apply a force to the limiting piece, so that the limiting piece cooperates with the limiting groove to make the rotating section and the rotating hole relatively fixed along the axial direction.

4. The low temperature chamber rapid sample changing device according to any one of claims 1 to 3, characterized in that: The mounting seat includes an annular top wall and an annular side wall surrounding the annular top wall and extending downwardly, the annular top wall is rotatably sleeved on the sample holder, the first connecting portion is configured as an external thread formed on the thermally conductive seat, and the second connecting portion is configured as an internal thread formed on the annular side wall, and when the external thread and the internal thread are tightened, the top surface of the thermally conductive seat is against the bottom surface of the sample holder in the annular side wall.

5. The low temperature chamber rapid sample changing device according to claim 4, characterized in that: The sample holder is provided with a positioning groove extending in the circumferential direction, the annular top wall is provided with a positioning protrusion adapted to the positioning groove, and the positioning protrusion is embedded in the positioning groove so that the mounting seat and the sample holder are relatively fixed in the axial direction.

6. The low temperature chamber rapid sample changing device according to any one of claims 1 to 3, characterized in that: The low-temperature cavity rapid sample exchange device further comprises a sample exchange cavity, and when the valve closes the sample transfer channel, the detection cavity is isolated from the sample exchange cavity, and when the valve opens the sample transfer channel, the sample transfer channel connects the detection cavity with the sample exchange cavity; The sample exchange cavity is provided with a sample exchange port which can be opened or closed. The sample support and the sample enter and exit the sample exchange cavity through the sample exchange port, and enter and exit the detection cavity through the sample transfer channel in the sample exchange cavity.

7. The low temperature chamber rapid sample changing device according to claim 6, characterized in that: The sample exchange chamber opens or closes the sample exchange port through a door body. When the door body closes the sample exchange port and the valve closes the sample transfer channel, the sample exchange chamber and the detection chamber are respectively sealed as vacuum-evacuable closed cavities, and the valve is configured as a gate valve.

8. The low temperature chamber rapid sample changing device according to claim 1, characterized in that: The top and / or side of the detection cavity is provided with a transparent observation window.

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