Automatic deep cold treatment device

Abstract

The present invention discloses an automatic cryogenic treatment device, which relates to the technical field of sample treatment, including a segmented sampling mechanism for selectively taking out samples in batches or at one time according to sampling requirements, and a liquid level detection mechanism for detecting the liquid nitrogen liquid level after all sampling. By controlling the driving gap of the driving motor in the segmented sampling mechanism, the sample immersion time can be controlled, and the driving motor is started after the time is up, and the sample can be lifted up and separated from the liquid nitrogen, and in the process of sampling, which samples can be selectively taken out, and when a sample is taken out, when the next sample is taken out, the taking out and placing between the samples are independently operated, and the sample taken out can still be returned to the liquid nitrogen for a second or even multiple cryogenic treatment, and when all the samples are taken out, the liquid nitrogen content can be detected in real time by using the liquid level detection mechanism to avoid low liquid nitrogen content and affect the subsequent cryogenic treatment of samples.

Description

Technical Field

[0001] The invention relates to the technical field of sample processing, and in particular to an automatic deep-freezing processing device. Background Art

[0002] Cryogenic treatment refers to a method of treating workpieces at temperatures below -130°C using liquid nitrogen as a refrigerant. Some materials require cryogenic treatment during the testing process.

[0003] During the cryogenic treatment of materials, some of them need to be processed for a long time, while the existing cryogenic treatment equipment is relatively simple. When doing cryogenic treatment of materials, some cryogenic treatments involve the problem of timed sampling, and the existing cryogenic treatment equipment cannot automatically perform sampling. Some sampling times may be late at night, resulting in units or individuals not being able to take out samples immersed in liquid nitrogen in time, causing forgetfulness and leading to experimental failure. In addition, even if sampling is done at night, it will increase the workload of the staff. At the same time, the existing cryogenic treatment equipment does not have the function of liquid level detection, and requires manual judgment. At this time, if there is less liquid nitrogen, it will affect the effect of cryogenic treatment. Summary of the invention

[0004] The technical solution of the present invention aims at the technical problem that the existing technical solution is too single, and provides a solution that is significantly different from the existing technology. The embodiment of the present invention provides an automatic cryogenic treatment device to solve the technical problem that the existing cryogenic treatment equipment is inconvenient when sampling because it does not have an automatic sampling function.

[0005] The embodiment of the present invention adopts the following technical scheme: an automatic cryogenic treatment device, including a liquid storage tank containing prepared liquid nitrogen, a supply pump for conveying the liquid nitrogen in the liquid storage tank, a placement rack for placing multiple components, a placement box for accumulating liquid nitrogen and a sample placement rack for placing samples, including a segmented sampling mechanism for selectively taking out samples in batches or all at once according to sampling requirements, a placement box for sampling in cooperation with the segmented sampling mechanism, and a liquid level detection mechanism for detecting the liquid level of the liquid nitrogen after all samplings, wherein the liquid storage tank, the supply pump and the placement box are directly placed on the placement rack, and the liquid storage tank and the placement box are connected via the supply pump.

[0006] Furthermore, the projection box is hollow, and a plurality of through grooves are provided on the side walls of the projection box, a channel is provided on the bottom of the projection box, a connecting rod is provided in the channel at the bottom of the projection box, the connecting rod and the projection box are connected by a reset spring, and the connecting rod passes through the projection box, a matching groove is provided on the side walls of the bottom of the projection box, and a connecting rack and a friction strip are respectively provided on the back side of the projection box.

[0007] Furthermore, a floating resistance block is provided on the surface of the placement box, an extrusion head is provided in the middle position of the floating resistance block, the floating resistance block is U-shaped, and the position of the floating resistance block corresponds to the position of the matching groove, the position of the extrusion head corresponds to the position through which the connecting rod passes, the contact surface between the floating resistance block and the matching groove is an arc surface, and a plurality of position detectors are provided on the surface of the placement box, and each position detector corresponds to the layout box.

[0008] Further, the segmented sampling mechanism includes a driving motor and a locking assembly, a plurality of driving rods are provided at the output end of the driving motor, each of the driving rods is connected to each other, each of the driving rods corresponds to the sample box, a snap-fitting groove and a guide limit block are sequentially provided on the driving rod, a movable spring plate slidably connected to the driving rod is provided outside the guide limit block, a fixed plate is provided at the end of the driving rod, the movable spring plate is connected to the fixed plate by a spring, a rotating motor is provided on the surface of the movable spring plate, the locking component includes a screw sleeve, the screw sleeve is connected to the output end of the rotating motor, an insertion block that moves back and forth is provided in the screw sleeve, the insertion block and the screw sleeve are connected by an electric telescopic rod, a screw head is provided in the screw sleeve, an insertion groove is provided on the end face of the screw head, a screw rod is provided on one side of the screw head, a rotating sleeve is provided at the outer sleeve at the position corresponding to the snap-fitting groove of the driving rod, a rotating groove is provided in the rotating sleeve, one side of the rotating groove is connected to the snap-fitting block, and the other side of the rotating groove is connected to the limit spring sleeve, the threaded rod is connected to the rotating sleeve, and a transmission tooth is provided on the end face of the rotating sleeve.

[0009] Furthermore, the cross section of the rotating groove is in the shape of an elongated strip and the end surface is in the shape of an arc, and the length of the rotating groove is greater than the outer diameter of the driving rod.

[0010] Furthermore, the contact surface between the engaging block and the engaging groove is an arc surface, and the contact end surface between the inserting block and the screw head is an arc surface.

[0011] Furthermore, the transmission tooth is connected to the connecting rack, and the end point value of the side wall of the screw sleeve is greater than the end point value of the side wall of the rotating sleeve so that the screw sleeve contacts the friction strip while the rotating sleeve does not contact the friction strip.

[0012] Furthermore, the liquid level detection mechanism includes a fixed plate, which is connected to the inner wall of the placement box, a floating plate is arranged below the fixed plate, the fixed plate and the floating plate are connected by a telescopic sleeve rod, a detection box is arranged on the surface of the placement box, a movable plate is arranged in the detection box, a pressure detector is arranged between the movable plate and the detection box, a spring is arranged between the movable plate and the bottom surface of the detection box, and the detection box and the telescopic sleeve rod are connected by a connecting pipe.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] Firstly, through the segmented sampling mechanism provided in the present application, when extracting several sample boxes placed in the placement box, it is possible to selectively select which sample box to sample. When performing cryogenic treatment, different materials may be cryogenically treated at the same time. Different materials will cause the cryogenic treatment time to vary. Different cryogenic treatment times will result in the need to take out different sampling boxes at different time periods (e.g., after a sampling box is taken out from the placement box, the next sampling box is taken out, and the previous sampling box cannot be affected by the next sampling). When sampling is performed using the segmented sampling mechanism, after a sampling box is sampled, Placed on the surface of the placement box, the segmented sampling mechanism will automatically disconnect from the sampling box, so that the segmented sampling mechanism will not affect the sampling box that has been taken out when performing the next work, thereby achieving the effect of segmented sampling without interference, and when the segmented sampling mechanism is sampling, one or more can be selectively controlled. At the same time, when the sample is taken out and tested, if it needs to be deep-cooled for a second time, the segmented sampling mechanism is manually controlled to be connected with the placement box, and the sampling box can be driven to enter the placement box for a second time by controlling the rotation of the driving motor, so that the product can be taken out and returned to the liquid nitrogen for a second or even multiple deep-cooling treatments;

[0015] Secondly, the liquid nitrogen remaining in the placement box can be detected by the liquid level detection mechanism. When detecting the liquid level, in order to ensure the accuracy of the detection, the detection should be carried out after all samples are taken out (because if there is still a sample box in the box, the liquid level will rise due to the volume of the sample box itself, and the more the number of samples placed, the higher the liquid level rises, and the liquid level is not the actual liquid level height, which can be understood as floating). When staking out, multiple samples may not be placed at the same time. Therefore, what needs to be measured should be the liquid level height without a sample box. Therefore, the liquid level detection mechanism will only perform the detection after all the sample boxes are taken out, and a sealed cover plate will be formed between the bottom of the sample box and the top of the placement box to prevent the volatilization and loss of liquid nitrogen;

[0016] To sum up, during the use of the device, the sample immersion time can be controlled by controlling the driving gap of the driving motor in the segmented sampling mechanism. After the time is up, the driving motor is started, and the sample can be lifted up and separated from the liquid nitrogen. In the sampling process, several samples can be selectively taken out, and when one sample is taken out, when the next sample is taken out, the taking out and placing of the samples are operated independently. The taken samples can still be returned to the liquid nitrogen for a second or even multiple deep-cold treatments, and when all the samples are taken out, the liquid level detection mechanism can be used to perform real-time detection of the liquid nitrogen content to avoid low liquid nitrogen content affecting subsequent deep-cold treatments of the samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of the placement box of the present invention;

[0020] Figure 3 It is a schematic diagram of the internal structure of the placement box of the present invention;

[0021] Figure 4 It is a schematic diagram of the structure of the liquid level detection mechanism of the present invention;

[0022] Figure 5 It is a schematic diagram of the relative position structure of the sample box and the liquid level detection mechanism of the present invention;

[0023] Figure 6 For the present invention Figure 5 The enlarged structural diagram at A in the middle;

[0024] Figure 7 It is a schematic diagram of the internal structure of the lofting box of the present invention;

[0025] Figure 8 It is a schematic diagram of the connection structure between the sample box and the segmented sampling mechanism of the present invention;

[0026] Fig. 9 It is a schematic diagram of the explosion structure of the segmented sampling mechanism of the present invention;

[0027] Fig.10 For the present invention Fig. 9 Enlarged structural diagram at B in the middle.

[0028] Reference numerals:

[0029] 1. Placement rack; 11. Liquid storage tank; 12. Supply pump; 13. Placement box; 21. Sample box; 22. Connecting rod; 23. Reset spring; 24. Position detector; 25. Matching groove; 26. Resistance block; 27. Extrusion head; 28. Connecting rack; 29. ​​Friction strip; 3. Segmented sampling mechanism; 31. Driving rod; 311. Engagement groove; 312. Guide limit block; 32. Rotating sleeve; 322. Transmission gear; 323. Engagement block; 324. Limit spring sleeve; 33. Locking assembly; 331. Electric telescopic rod; 332. Insertion block; 333. Threaded rod; 334. Screw head; 335. Screw sleeve; 34. Rotating motor; 35. Movable spring plate; 4. Liquid level detection mechanism; 41. Floating plate; 42. Telescopic sleeve rod; 43. Fixed plate; 44. Movable plate; 45. Detection box; 46. Pressure detector. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0031] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0032] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, 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 communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Combine the following Figures 1 to 10 As shown, an embodiment of the present invention provides an automatic cryogenic treatment device, including a liquid storage tank 11 for storing prepared liquid nitrogen, a supply pump 12 for conveying the liquid nitrogen in the liquid storage tank 11, a placement rack 1 for placing multiple components, and also includes a placement box 13 for accumulating liquid nitrogen and a placement box 21 for placing samples, including a segmented sampling mechanism 3 for selectively taking out samples in batches or all at once according to sampling requirements, a placement box 13 for sampling in cooperation with the segmented sampling mechanism 3, and a liquid level detection mechanism 4 for detecting the liquid level of all liquid nitrogen after sampling. The liquid storage tank 11, the supply pump 12 and the placement box 13 are placed on the placement rack 1, and the liquid storage tank 11 and the placement box 13 are connected through the supply pump 12.

[0036] Specifically, the lofting box 21 is hollow, and a plurality of through grooves are provided on the side walls of the lofting box 21. A channel is provided on the bottom of the lofting box 21. A connecting rod 22 is provided in the channel at the bottom of the lofting box 21. The connecting rod 22 and the lofting box 21 are connected by a reset spring 23, and the connecting rod 22 passes through the lofting box 21. A matching groove 25 is provided on the side walls of the bottom of the lofting box 21, and a connecting rack 28 and a friction strip 29 are respectively provided on the back side of the lofting box 21.

[0037] During operation, since the bottom of the layout box 21 is provided with a matching groove 25, and there is no matching groove 25 in other positions, the side wall of the layout box 21 abuts against the abutment block 26, so that its interior is always in a tightened state. When the abutment block 26 moves to the bottom, the abutment effect on the abutment block 26 is cancelled, and the abutment block 26 is reset under the action of the spring, thereby driving the extrusion head 27 to synchronously move and abut the connecting rod 22, causing it to move and thereby driving subsequent effects.

[0038] Specifically, a floating resistance block 26 is provided on the surface of the placement box 13, and an extrusion head 27 is provided in the middle position of the floating resistance block 26. The floating resistance block 26 is U-shaped, and the position of the floating resistance block 26 corresponds to the position of the matching groove 25, and the position of the extrusion head 27 corresponds to the penetration position of the connecting rod 22. The contact surface between the floating resistance block 26 and the matching groove 25 is an arc surface. A plurality of position detectors 24 are provided on the surface of the placement box 13, and each position detector 24 corresponds to the layout box 21.

[0039] During operation, the position of the layout box 21 can be detected by the position detector 24 , thereby controlling the working state of the corresponding electrically connected electric telescopic rod 331 , thereby achieving whether the screw head 334 and the screw sleeve 335 are connected.

[0040] Specifically, the segmented sampling mechanism 3 includes a driving motor and a locking assembly 33, a plurality of driving rods 31 are provided at the output end of the driving motor, each of the driving rods 31 is connected to each other, each of the driving rods 31 corresponds to the sample box 21, and a snap-fit ​​groove 311 and a guide limit block 312 are sequentially provided on the driving rod 31, and a movable spring plate 35 slidably connected to the driving rod 31 is provided outside the guide limit block 312, and a fixed plate 43 is provided at the end of the driving rod 31, and the movable spring plate 35 is connected to the fixed plate 43 by a spring, and a rotating motor 34 is provided on the surface of the movable spring plate 35, and the locking component includes a screw sleeve 335, and the screw sleeve 335 is connected to the rotating The output end of the motor 34 is connected, and an insertion block 332 that moves forward and backward is arranged in the screw sleeve 335. The insertion block 332 and the screw sleeve 335 are connected by an electric telescopic rod 331. A screw head 334 is arranged in the screw sleeve 335, and an insertion groove is arranged on the end face of the screw head 334. A screw rod is arranged on one side of the screw head 334. A rotating sleeve 32 is arranged on the outer cover at a corresponding position of the engaging groove 311 of the driving rod 31, and a rotating groove is arranged in the rotating sleeve 32. One side of the rotating groove is connected to the engaging block 323, and the other side of the rotating groove is connected to the limit spring sleeve 324. The threaded rod 333 is connected to the rotating sleeve 32, and a transmission tooth 322 is arranged on the end face of the rotating sleeve 32.

[0041] When working, the driving motor is connected to the operator, and the operator is provided with a plurality of time buttons and a numerical panel corresponding to the sample box 21. When all the samples are placed in the placing box 13, the corresponding sample box 21 is selected and the corresponding driving motor interval value is pressed. At this time, the operator distinguishes and presses several driving motor interval values. After reaching the specified time, the driving motor rotates from small to large interval time in sequence after the time is reached. During the rotation process, the corresponding rotating motor 34 of the sample box 21 that needs to be taken out corresponding to different interval times works, so that the corresponding sample box 21 will follow the rotating driving motor after the time is reached. The driving motor rises to automatically sample (such as 3 hours, 6 hours and 9 hours, for example, the corresponding time of the first sample box 21 is 3 hours, that is, the driving motor will rotate after the first sample box 21 reaches 3 hours, and the rotating motor 34 works synchronously at this time, and finally the first sample box 21 is automatically taken out within the set time). At this time, people do not need to stay in front of the equipment all the time. After the set time is reached, the operator sends a signal to the motor controller to drive the motor to work automatically, thereby achieving the effect of automatic sampling. Since the height of the sample box 21 is constant, the working time of the driving motor each time it rotates is also a constant value.

[0042] Specifically, the cross section of the rotation groove is in the shape of an elongated strip and the end surface is in the shape of an arc, and the length of the rotation groove is greater than the outer diameter of the driving rod 31 .

[0043] During operation, the rotation of the driving rod 31 may drive the rotating sleeve 32 to rotate or may not drive the rotating sleeve 32 to rotate, so that the corresponding lofting box 21 can follow the movement or not move.

[0044] Specifically, the contact surface between the engaging block 323 and the engaging groove 311 is an arc surface, and the contact end surface between the inserting block 332 and the screw head 334 is an arc surface.

[0045] During operation, the contact surface is an arc surface for easy insertion, which plays a role of guiding the insertion, and the subsequent vertical surface ensures the limit drive.

[0046] Specifically, the transmission tooth 322 is connected to the connecting rack 28 , and the end point value of the side wall of the screw sleeve 335 is greater than the end point value of the side wall of the rotating sleeve 32 so that the screw sleeve 335 contacts the friction strip 29 while the rotating sleeve 32 does not contact the friction strip 29 .

[0047] During operation, the rotation of the rotating sleeve 32 will drive the screw sleeve 335 to revolve, and the screw sleeve 335 will rotate when in contact with the friction strip 29. The upper and lower heights of the lofting box are constant distances, that is, the upper and lower moving range and the fixed number of rotations of the driving rod 31. Its height is also constant when it is descending.

[0048] Specifically, the liquid level detection mechanism 4 includes a fixed plate 43, which is connected to the inner wall of the placement box 13, a floating plate 41 is arranged below the fixed plate 43, the fixed plate 43 and the floating plate 41 are connected by a telescopic sleeve 42, a detection box 45 is arranged on the surface of the placement box 13, a movable plate 44 is arranged in the detection box 45, a pressure detector 46 is arranged between the movable plate 44 and the detection box 45, a spring is arranged between the movable plate 44 and the bottom surface of the detection box 45, and the detection box 45 and the telescopic sleeve 42 are connected by a connecting pipe.

[0049] At this time, the liquid level detection mechanism 4 can be replaced with a fixed detector (such as a laser level meter, which uses laser ranging technology to judge the liquid level) according to the size of the cryogenically treated material (if the cryogenic material being treated is small, the entry and removal of the cryogenic material will not have a significant impact on the liquid level). The fixed detector is placed on the inner side wall of the placement box 13 at a constant height, and the liquid level can be detected in real time. When it is lower than the set value, the supply pump 12 starts to work and automatically supplies nitrogen to the placement box 13.

[0050] Working principle: Before the cryogenic treatment, the sample box 21 is located at the top of the placement box 13. At this time, the sample is placed in the sample box 21. The controller controls the driving motor to drive the screw sleeve 335 to rotate. In the initial stage, the electric telescopic rod 331 of the insertion block 332 is extended, so that the insertion block 332 is inserted into the screw head 334. At this time, the rotation of the screw sleeve 335 will eventually drive the threaded rod 333 to rotate. The rotation of the threaded rod 333 will be connected with the screw sleeve 335 hole on the rotating sleeve 32, so that the screw sleeve 335 rod is constantly moving inward. Since the rotating motor 34 and the driving rod 31 are connected by a movable spring plate 35, the driving motor is actually constantly moving inward, ensuring that the threaded rod 333 can be rotated into the threaded hole. When the threaded rod 333 is installed in place;

[0051] After the cam 331 is in the state of being moved, the cam 332 is in the state of being moved, and the cam 333 is in the state of being moved, so that the cam 333 is in the state of being moved.

[0052] After descending to the end, the position detector 24 detects that the insertion block 332 and the screw head 334 are in contact again, and the rotating motor 34 rotates, so that the limit between the rotating sleeve 32 and the driving rod 31 is released. At this time, multiple sampling may be required during sampling, and the sampling time between each sampling box is different. At this time, the rotation time of the driving motor is the interval time. When sampling a certain lofting box 21, it is selected whether to connect the threaded rod 333 and the rotating sleeve 32 (that is, to control the position of the threaded rod 333 so as to realize the rotation of the driving rod 31 to drive the rotating sleeve 32 to rotate, and the rotation of the rotating sleeve 32 will control the position lifting of the lofting box 21);

[0053] When one of them is lifted, in the initial state, the threaded rod 333 is connected to the rotating sleeve 32, and the screw sleeve 335 is connected to the screw head 334. At this time, the screw head 334 contacts the friction strip 29, so that the screw head 334 reverses. Due to the rotation of the transmission tooth 322 and the connecting rack 28, the layout box 21 will rise, and the screw head 334 drives the threaded rod 333 to rotate continuously. When it rises to the end, the threaded rod 333 is separated from the rotating sleeve 32, and the abutment block 26 is inserted into the matching groove 25. The extrusion head 27 is reset, thereby driving the extrusion head 27 to reset and contact the connecting rod 22 to displace it. The extrusion head 27 is inserted into the through slot on the connecting rod 22 to fix its position. After the connecting rod 22 is displaced, it contacts the rotating sleeve 32 to displace it. The engaging groove 311 is disengaged from the engaging block 323. At this time, the rotation of the driving rod 31 will not drive the rotating sleeve 32 to rotate. At this time, the electric telescopic rod 331 also works, so that the screw head 334 is disengaged from the screw sleeve 335. When the driving rod 31 rotates next time, the above steps are repeated;

[0054] When all the sample boxes 21 are taken out, the pressure detector 46 detects that a certain pressure of helium is set in the telescopic rod 42. Since the floating plate 41 is always located on the surface of the liquid nitrogen, and the floating plate 41 and the fixed plate 43 are connected by the telescopic rod 42, the less liquid nitrogen is, the longer the telescopic rod 42 is, so that the air pressure in the telescopic rod 42 is smaller. When the pressure detected by the pressure detector 46 is less than a certain value, it means that the liquid nitrogen level is too low, and then the supply pump 12 is driven by the controller to work to supply the placement box 13.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic cryogenic treatment device, comprising a liquid storage tank (11) containing prepared liquid nitrogen, and a supply pump (12) for conveying the liquid nitrogen in the liquid storage tank (11), characterized in that; It also includes a sample placement box (21) for placing samples, including a segmented sampling mechanism (3) for selectively taking out samples in batches or all at once according to sampling requirements, a placement box (13) for accumulating liquid nitrogen and cooperating with the segmented sampling mechanism (3) for sampling, and a liquid level detection mechanism (4) for detecting the liquid level of all liquid nitrogen after sampling. The liquid storage box (11), the supply pump (12) and the placement box (13) are directly placed on the placement rack (1), and the liquid storage box (11) and the placement box (13) are connected via the supply pump (12); A connecting rack (28) is provided on the back side of the layout box (21); The segmented sampling mechanism (3) comprises a driving motor and a locking assembly (33); a plurality of driving rods (31) are arranged at the output end of the driving motor; each of the driving rods (31) is connected to each other; each of the driving rods (31) corresponds to a sample placing box (21); a locking groove (311) and a guide stop block (312) are sequentially provided on the driving rod (31); a movable spring plate (35) slidably connected to the driving rod (31) is arranged outside the guide stop block (312); a fixed plate is arranged at the end of the driving rod (31); the movable spring plate (35) is connected to the fixed plate via a spring; a rotating motor (34) is arranged on the surface of the movable spring plate (35); the locking assembly (33) comprises a screw sleeve (335); the screw sleeve (335) is connected to the output end of the rotating motor (34); a front and rear screw sleeve (335) is arranged inside the screw sleeve (335); A movable insertion block (332) is provided, wherein the insertion block (332) and the screw sleeve (335) are connected via an electric telescopic rod (331); a screw head (334) is provided in the screw sleeve (335); an insertion groove is provided on the end surface of the screw head (334); a threaded rod (333) is provided on one side of the screw head (334); a rotating sleeve (32) is provided on the outer cover at a position corresponding to the engaging groove (311) of the driving rod (31); a rotating groove is provided in the rotating sleeve (32); one side of the rotating groove is connected to the engaging block (323); the engaging block (323) is in contact with the engaging groove (311); the other side of the rotating groove is connected to a limit spring sleeve; the threaded rod (333) is connected to the rotating sleeve (32); a transmission tooth (322) is provided on the end surface of the rotating sleeve (32); and the transmission tooth (322) is connected to a connecting rack (28).

2. An automatic cryogenic treatment device according to claim 1, characterized in that; The lofting box (21) is hollow, a channel is provided at the bottom of the lofting box (21), a connecting rod (22) is provided in the channel at the bottom of the lofting box (21), the connecting rod (22) and the lofting box (21) are connected via a return spring (23), and the connecting rod (22) passes through the lofting box (21), and a matching groove (25) is provided on the side wall at the bottom of the lofting box (21).

3. An automatic cryogenic treatment device according to claim 2, characterized in that; The surface of the placement box (13) is provided with a floating abutment block (26), and an extrusion head (27) is provided in the middle of the floating abutment block (26). The floating abutment block (26) is U-shaped, and the position of the floating abutment block (26) corresponds to the position of the matching groove (25). The contact surface between the floating abutment block (26) and the matching groove (25) is an arc surface. The position of the extrusion head (27) corresponds to the penetration position of the connecting rod (22). The surface of the placement box (13) is provided with a plurality of position detectors (24), and each position detector (24) corresponds to a lofting box (21). After the lofting box (21) rises to the end, the connecting rod (22) and the rotating sleeve (32) correspond to each other.

4. The automatic cryogenic treatment device according to claim 1, characterized in that The cross section of the rotating groove is long and the end surface is arc-shaped, and the length of the rotating groove is greater than the outer diameter of the driving rod (31).

5. The automatic cryogenic treatment device according to claim 1, characterized in that: The contact surface between the locking block (323) and the locking groove (311) is an arc surface, and the contact end surface between the insertion block (332) and the screw head (334) is an arc surface.

6. The automatic cryogenic treatment device according to claim 1, characterized in that: A friction strip (29) is also provided on the back side of the lofting box (21), and a plurality of through slots are provided on the side wall of the lofting box (21). The transmission teeth (322) are connected to the connecting rack (28), the screw sleeve (335) is in contact with the friction strip (29), and the rotating sleeve (32) is not in contact with the friction strip (29).

7. The automatic cryogenic treatment device according to claim 1, characterized in that: The liquid level detection mechanism (4) comprises a fixed plate (43), the fixed plate (43) being connected to the inner wall of the placement box (13), a floating plate (41) being arranged below the fixed plate (43), the fixed plate (43) and the floating plate (41) being connected via a telescopic sleeve rod (42), a detection box (45) being arranged on the surface of the placement box (13), a movable plate (44) being arranged inside the detection box (45), a pressure detector (46) being arranged between the movable plate (44) and the detection box (45), a spring being arranged between the movable plate (44) and the inner bottom surface of the detection box (45), and the detection box (45) and the telescopic sleeve rod (42) being connected via a connecting pipe.

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