Splash-proof liquid adding device

Abstract

The utility model discloses a splash-proof liquid adding device which comprises a liquid storage mechanism, a splash-proof mechanism and a rotary liquid adding mechanism, a liquid storage mechanism is arranged above the liquid storage mechanism, a splash-proof mechanism is arranged above the liquid storage mechanism, a rotary liquid adding mechanism is arranged on the liquid storage mechanism, the liquid storage mechanism can store liquid nitrogen, impact force of the liquid nitrogen can be counteracted through the splash-proof mechanism, the liquid nitrogen is vaporized and discharged, and the rotary liquid adding mechanism can rotate and lift around the liquid storage mechanism and can perform liquid adding operation. The device has the beneficial effects that liquid nitrogen can be subjected to multi-layer buffering and splash prevention through the splash-proof mechanism in the liquid inlet, so that the impact force of the liquid nitrogen is counteracted, gasified nitrogen can be discharged out of the device through the splash-proof mechanism, liquid can be added to a target object through the rotary liquid adding mechanism, and the liquid adding efficiency is improved. And the rotary liquid adding mechanism can be lifted and rotated, so that liquid adding operation can be better carried out on transfer tanks or other target objects at different positions and at different heights.

Description

Technical Field

[0001] The utility model relates to the technical field of sample storage, in particular to a splash-proof liquid adding device. Background Art

[0002] In the field of sample storage, the transfer tank is used to temporarily store biological samples such as blood samples, vaccines, bacteria and viruses at low temperatures, so that the samples are kept in liquid nitrogen for a short period of time to preserve their activity and ensure that the transfer tank maintains the entire cold chain during the transfer process. For this reason, the transfer tank needs to be replenished with liquid nitrogen in a timely manner.

[0003] In the existing liquid adding mechanism, for example, in the patent disclosed in CN202310835987.8, liquid is added to the target container by connecting the liquid nitrogen delivery pipeline and then outputting it from the liquid adding port. The liquid adding component needs to have a passage on the top for discharging vaporized liquid nitrogen. The pressure of liquid nitrogen is relatively high when it flows in the pipeline. When entering the liquid adding component, the liquid nitrogen is still in liquid form and is easy to splash out from the top. For this reason, the inventor has designed a splash-proof liquid adding device. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In view of the above problems or problems existing in the prior art, the present utility model is proposed.

[0006] Therefore, the purpose of the utility model is to provide a splash-proof liquid adding device, which can perform multiple buffering and splash-proofing on liquid nitrogen through the splash-proof mechanism 2 during liquid adding, and the vaporized nitrogen can be discharged outside the equipment, and the target object can be added with liquid through the rotating liquid adding mechanism 3, and the rotating liquid adding mechanism 3 can be driven to rise and fall through the lifting drive mechanism 4, and the rotating liquid adding mechanism 3 can be driven to rotate a certain angle through the rotating mechanism 5.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a splash-proof liquid-adding device, which comprises a liquid storage mechanism 1, a splash-proof mechanism 2, and a rotating liquid-adding mechanism 3; the splash-proof mechanism 2 is arranged above the liquid storage mechanism 1, and the rotating liquid-adding mechanism 3 is arranged on the liquid storage mechanism 1; the liquid storage mechanism 1 can store liquid nitrogen, and the impact force of the liquid nitrogen can be offset and vaporized and discharged through the splash-proof mechanism 2; the rotating liquid-adding mechanism 3 can rotate and rise around the liquid storage mechanism 1, and the rotating liquid-adding mechanism 3 can perform liquid-adding operations.

[0008] As a preferred solution of the splash-proof liquid-adding device of the utility model, the splash-proof mechanism 2 includes a first splash-proof buffer 21 , a first impact hole 22 is formed at the bottom of the first splash-proof buffer 21 , and the first impact hole 22 can prevent liquid nitrogen from splashing.

[0009] As a preferred solution of the splash-proof liquid-adding device of the utility model, the splash-proof mechanism 2 is arranged in a cylindrical shape, and an open end is arranged at the upper end.

[0010] As a preferred solution of the splash-proof liquid-adding device of the utility model, the splash-proof mechanism 2 also includes a second splash-proof buffer 23, which is arranged around the circumference of the first splash-proof buffer 21, and a second buffer chamber 24 is formed between the second splash-proof buffer 23 and the first splash-proof buffer 21.

[0011] As a preferred solution of the splash-proof liquid-adding device of the utility model, the second splash-proof buffer 23 is provided with a second through hole 25 , and the second through hole 25 allows liquid nitrogen or nitrogen gas to pass through.

[0012] As a preferred solution of the splash-proof liquid-adding device of the utility model, the splash-proof mechanism 2 further comprises a third splash-proof buffer 26, which is circumferentially arranged on the side of the second splash-proof buffer 23, and a third buffer chamber 27 is formed between the third splash-proof buffer 26 and the second splash-proof buffer 23, and a vent 28 is provided on the third splash-proof buffer 26, through which nitrogen can pass.

[0013] As a preferred solution of the splash-proof liquid adding device of the utility model, the rotating liquid adding mechanism 3 includes a liquid nitrogen moving cylinder 31, a liquid adding tube 32, and a guide tube 33. The liquid adding tube 32 is arranged on the liquid nitrogen moving cylinder 31, and the guide tube 33 is arranged on the liquid adding tube 32. The liquid nitrogen moving cylinder 31 is connected to the liquid storage mechanism 1, a temperature probe is arranged on the liquid adding tube 32, and a wire can be passed through the guide tube 33.

[0014] As a preferred solution of the splash-proof liquid adding device of the utility model, it further includes a lifting drive mechanism 4 , which can drive the rotating liquid adding mechanism 3 to be lifted and lowered along the liquid storage mechanism 1 .

[0015] As a preferred solution of the splash-proof liquid-adding device of the utility model, the lifting drive mechanism 4 includes a lifting drive member 41, a follower 42, and a connecting member 43. The lower end of the lifting drive member 41 is connected to the follower 42, and the two ends of the connecting member 43 are respectively connected to the rotating liquid-adding mechanism 3 and the follower 42. The rotation of the follower 42 can drive the connecting member 43 to rise and fall.

[0016] As a preferred solution of the splash-proof liquid-adding device of the utility model, it further includes a rotating mechanism 5 , which is arranged on the lifting drive mechanism 4 , and can drive the rotating liquid-adding mechanism 3 to rotate.

[0017] As a preferred solution of the splash-proof liquid-adding device of the utility model, it further includes a limiting mechanism 6 , which is arranged on the lifting drive mechanism 4 , and can limit the rotation angle of the rotating liquid-adding mechanism 3 .

[0018] As a preferred solution of the splash-proof liquid-adding device of the utility model, the limiting mechanism 6 includes a limiting member 61, a rotating limiting member 62, and a liquid nitrogen moving cylinder 31; the limiting member 61 is arranged on the connecting member 43, and the rotating limiting member 62 is arranged on the liquid nitrogen moving cylinder 31, and the limiting member 61 can limit the rotating limiting member 62.

[0019] As a preferred solution of the splash-proof liquid-adding device of the utility model, a sensor assembly 8 is arranged on the side of the rotating mechanism 5 , and the sensor assembly 8 can detect the lifting distance and the rotation angle of the rotating liquid-adding mechanism 3 .

[0020] As a preferred solution of the splash-proof liquid-adding device of the utility model, a liquid inlet 7 is provided on the liquid storage mechanism 1 , and the liquid inlet 7 is communicated with the liquid storage mechanism 1 .

[0021] Beneficial effects of the utility model: the utility model can deliver liquid nitrogen into the liquid storage mechanism 1 through the liquid inlet 7, and can perform multi-layer buffering and splash prevention on the liquid nitrogen through the splash-proof mechanism 2, thereby offsetting the impact force of the liquid nitrogen, and the gasified nitrogen can be discharged out of the equipment through the splash-proof mechanism 2, and the target object can be liquid-added through the rotating liquid-adding mechanism 3, and the rotating liquid-adding mechanism 3 can be lifted and rotated, so as to better perform liquid-adding operations on transfer tanks or other targets at different positions and heights. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0023] Figure 1 It is the overall schematic diagram of the splash-proof liquid adding device.

[0024] Figure 2 This is an overall schematic diagram of the splash-proof liquid adding device from another perspective.

[0025] Figure 3 for Figure 1Enlarged view of F1 of the splash-proof liquid adding device.

[0026] Figure 4 for Figure 2 Enlarged view of F2 of the splash-proof dosing device.

[0027] Figure 5 This is the left side view of the splash-proof filling device.

[0028] Figure 6 for Figure 5 Cross-sectional view at AA of the splash-proof liquid-filling device.

[0029] Figure 7 for Figure 6 Schematic diagram of F3 with splash-proof liquid adding device.

[0030] Figure numerals: liquid storage mechanism, 1; splash-proof mechanism, 2; rotary liquid-adding mechanism, 3; first splash-proof buffer, 21; first impact hole, 22; second splash-proof buffer, 23; second buffer chamber, 24; second through hole, 25; third splash-proof buffer, 26; third buffer chamber, 27; vent, 28; liquid nitrogen moving cylinder, 31; liquid-adding pipe, 32; guide pipe, 33; lifting drive mechanism, 4; lifting drive member, 41; driven member, 42; connecting member, 43; rotating mechanism, 5; limiting mechanism, 6; limiting member, 61; rotating limiting member, 62; liquid inlet, 7; sensor assembly, 8; DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0034] Example 1

[0035] Reference Figures 1-2, which is the first embodiment of the utility model, and this embodiment provides a splash-proof liquid-adding device, which includes a liquid storage mechanism 1, a splash-proof mechanism 2, and a rotary liquid-adding mechanism 3. The rotary liquid-adding mechanism 3 is arranged below the liquid storage mechanism 1, and the liquid storage mechanism 1 can supply liquid nitrogen to the rotary liquid-adding mechanism 3. The target object can be added with liquid through the rotary liquid-adding mechanism 3. The splash-proof mechanism 2 can prevent splashing during the liquid-adding process, and can offset the impact force of the liquid nitrogen. The vaporized nitrogen is discharged to the outside of the device through the splash-proof mechanism 2.

[0036] Specifically, it includes a liquid storage mechanism 1, an anti-splash mechanism 2, and a rotating liquid adding mechanism 3; the anti-splash mechanism 2 is arranged above the liquid storage mechanism 1, and the rotating liquid adding mechanism 3 is arranged on the liquid storage mechanism 1. The liquid storage mechanism 1 can store liquid nitrogen, and the anti-splash mechanism 2 can offset the impact force of the liquid nitrogen and vaporize and discharge it. The rotating liquid adding mechanism 3 can rotate and rise around the liquid storage mechanism 1, and the rotating liquid adding mechanism 3 can perform liquid adding operations.

[0037] In summary, the utility model can store liquid nitrogen through the liquid storage mechanism 1 and supply the liquid nitrogen to the rotating liquid adding mechanism 3. The target object can be rotated and lifted through the rotating liquid adding mechanism 3, and liquid adding operations can be performed on targets at different heights and positions. The anti-splash mechanism 2 can offset the impact force generated by the liquid nitrogen and prevent splashing, and the liquid nitrogen can be discharged from the equipment through the anti-splash mechanism 2 after being vaporized.

[0038] Example 2

[0039] Reference Figures 1 to 7 , which is the second embodiment of the utility model. In the previous embodiment, the splash-proof liquid-adding device includes a liquid storage mechanism 1, a splash-proof mechanism 2, and a rotary liquid-adding mechanism 3. The rotary liquid-adding mechanism 3 is arranged below the liquid storage mechanism 1. The liquid storage mechanism 1 can supply liquid nitrogen to the rotary liquid-adding mechanism 3, and the target object can be added with liquid through the rotary liquid-adding mechanism 3. The splash-proof mechanism 2 can prevent splashing during the liquid-adding process, offset the impact force of the liquid nitrogen, and the vaporized nitrogen is discharged outside the equipment through the splash-proof mechanism 2.

[0040] Specifically, it includes a liquid storage mechanism 1, an anti-splash mechanism 2, and a rotating liquid adding mechanism 3; the anti-splash mechanism 2 is arranged above the liquid storage mechanism 1, and the rotating liquid adding mechanism 3 is arranged on the liquid storage mechanism 1. The liquid storage mechanism 1 can store liquid nitrogen, and the anti-splash mechanism 2 can offset the impact force of the liquid nitrogen and vaporize and discharge it. The rotating liquid adding mechanism 3 can rotate and rise around the liquid storage mechanism 1, and the rotating liquid adding mechanism 3 can perform liquid adding operations.

[0041] Furthermore, the splash-proof mechanism 2 includes a first splash-proof buffer 21 , and a first impact hole 22 is formed at the bottom of the first splash-proof buffer 21 . The first impact hole 22 can prevent liquid nitrogen from splashing.

[0042] Preferably, the liquid nitrogen can enter the first splash-proof buffer 21 through the first impact hole 22 , so as to provide a first buffer and splash-proof effect on the liquid nitrogen, and a part of the impact force of the liquid nitrogen can be offset by the first splash-proof buffer 21 .

[0043] Furthermore, the splash-proof mechanism 2 is arranged in a cylindrical shape, and an open end is arranged at the upper end.

[0044] Preferably, the purpose of setting an open end at the upper end of the splash-proof mechanism 2 is mainly to allow the liquid nitrogen that cannot be offset to enter the second splash-proof buffer 23 for a second buffering.

[0045] Furthermore, the splash-proof mechanism 2 further includes a second splash-proof buffer 23 , which is disposed around the circumference of the first splash-proof buffer 21 , and a second buffer chamber 24 is formed between the second splash-proof buffer 23 and the first splash-proof buffer 21 .

[0046] Preferably, the liquid nitrogen can enter the second buffer chamber 24 through the upper end of the first splash-proof buffer 21, and the liquid nitrogen can be further buffered by the second splash-proof buffer 23, thereby relieving a part of the impact force of the liquid nitrogen.

[0047] Furthermore, a second through hole 25 is formed on the second anti-splash buffer 23 , and the second through hole 25 allows liquid nitrogen or nitrogen gas to pass through.

[0048] Preferably, the liquid nitrogen in the second anti-splash buffer 23 can enter the third anti-splash buffer 26 through the second through hole 25. Therefore, the impact force of the liquid nitrogen can be offset in sequence by setting the three-level buffer, and the liquid nitrogen can be splash-proof.

[0049] Furthermore, the splash-proof mechanism 2 also includes a third splash-proof buffer 26, which is circumferentially arranged on the side of the second splash-proof buffer 23, and a third buffer chamber 27 is formed between the third splash-proof buffer 26 and the second splash-proof buffer 23. The third splash-proof buffer 26 is provided with a vent hole 28, and the vent hole 28 allows nitrogen to pass through.

[0050] Preferably, the liquid nitrogen in the third splash buffer 26 can be discharged to the outside of the device through the vent 28 after being vaporized.

[0051] Preferably, the liquid nitrogen is buffered and offset by the first splash-proof buffer 21, the second splash-proof buffer 23, and the third splash-proof buffer 26 in sequence, so that the impact force of the liquid nitrogen can be eliminated and the liquid nitrogen can be prevented from splashing to the outside.

[0052] Furthermore, the rotating liquid adding mechanism 3 includes a liquid nitrogen moving cylinder 31, a liquid adding tube 32, and a guide tube 33. The liquid adding tube 32 is arranged on the liquid nitrogen moving cylinder 31, and the guide tube 33 is arranged on the liquid adding tube 32. The liquid nitrogen moving cylinder 31 is connected to the liquid storage mechanism 1, a temperature probe is arranged on the liquid adding tube 32, and a wire can be passed through the guide tube 33.

[0053] Preferably, the liquid nitrogen moving cylinder 31 is docked with the liquid storage mechanism 1 , and the liquid nitrogen moving cylinder 31 can be fitted with the liquid storage mechanism 1 , and the liquid nitrogen moving cylinder 31 can be raised and lowered along the liquid storage mechanism 1 , and the liquid nitrogen moving cylinder 31 can also be rotated along the liquid storage mechanism 1 .

[0054] Preferably, a temperature probe is provided at the front end of the liquid adding tube 32 to detect the temperature in the target container.

[0055] Preferably, a wire can be threaded into the guide tube 33 and connected to the temperature probe.

[0056] Preferably, the liquid adding pipe 32 can be used to add liquid nitrogen into the target object.

[0057] Furthermore, it also includes a lifting drive mechanism 4, which can drive the rotary liquid adding mechanism 3 to move up and down along the liquid storage mechanism 1.

[0058] Furthermore, the lifting drive mechanism 4 includes a lifting drive member 41, a follower 42, and a connecting member 43. The lower end of the lifting drive member 41 is connected to the follower 42, and the two ends of the connecting member 43 are respectively connected to the rotating liquid adding mechanism 3 and the follower 42. The rotation of the follower 42 can drive the connecting member 43 to rise and fall.

[0059] Preferably, the lifting drive member 41 is driven by a motor, the follower 42 can be a lead screw, the connecting member 43 and the follower 42 are threadedly connected, and the lifting drive member 41 drives the follower 42 to rotate, and the follower 42 cooperates with the connecting member 43 to drive the connecting member 43 to rise and fall.

[0060] Furthermore, it also includes a rotating mechanism 5, which is arranged on the lifting drive mechanism 4, and the rotating mechanism 5 can drive the rotating liquid adding mechanism 3 to rotate.

[0061] Preferably, the rotating mechanism 5 can drive the rotary liquid adding mechanism 3 to rotate, and the rotation angle can be 120° fan-shaped rotation, which greatly increases the applicable scope of liquid adding.

[0062] Furthermore, it also includes a limiting mechanism 6 , which is arranged on the lifting drive mechanism 4 , and the limiting mechanism 6 can limit the rotation angle of the rotating liquid adding mechanism 3 .

[0063] Furthermore, the limiting mechanism 6 includes a limiting member 61, a rotating limiting member 62, and a liquid nitrogen moving cylinder 31; the limiting member 61 is arranged on the connecting member 43, and the rotating limiting member 62 is arranged on the liquid nitrogen moving cylinder 31, and the limiting member 61 can limit the rotating limiting member 62.

[0064] Preferably, the rotation of the liquid nitrogen moving cylinder 31 drives the rotating limit member 62 to rotate, and the rotating limit member 62 stops rotating when encountering the limit member 61. Two groups of limit members 61 can be provided to limit the rotation angle of the rotating limit member 62, thereby limiting the angle of the rotating liquid adding mechanism 3.

[0065] Furthermore, a sensor assembly 8 is provided on the side of the rotating mechanism 5 , and the sensor assembly 8 can detect the lifting distance and the rotation angle of the rotating liquid adding mechanism 3 .

[0066] Furthermore, a liquid inlet 7 is provided on the liquid storage mechanism 1 , and the liquid inlet 7 is communicated with the liquid storage mechanism 1 .

[0067] Preferably, liquid nitrogen can be injected into the liquid storage mechanism 1 through the liquid inlet 7 .

[0068] In summary, the utility model can deliver liquid nitrogen into the liquid storage mechanism 1 through the liquid inlet 7, and can perform multi-layer buffering and splash prevention on the liquid nitrogen through the splash-proof mechanism 2, thereby offsetting the impact force of the liquid nitrogen, and the vaporized nitrogen can be discharged out of the equipment through the splash-proof mechanism 2, and the target object can be added with liquid through the rotating liquid adding mechanism 3, and the rotating liquid adding mechanism 3 can be lifted and rotated, so as to better perform liquid adding operations on transfer tanks or other targets at different positions and heights.

[0069] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and ratio of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also an equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0070] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0071] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but for those of ordinary skill having the benefit of this disclosure, without undue experimentation, the development effort will be a routine task of design, fabrication, and production.

[0072] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A splash-proof liquid adding device, characterized in that: The invention comprises a liquid storage mechanism (1), a splash-proof mechanism (2), and a rotary liquid-adding mechanism (3); the splash-proof mechanism (2) is arranged above the liquid storage mechanism (1), the rotary liquid-adding mechanism (3) is arranged on the liquid storage mechanism (1), the liquid storage mechanism (1) can store liquid nitrogen, the impact force of the liquid nitrogen can be offset by the splash-proof mechanism (2) and the liquid nitrogen can be vaporized and discharged, the rotary liquid-adding mechanism (3) can rotate and rise around the liquid storage mechanism (1), and the rotary liquid-adding mechanism (3) can perform liquid-adding operations.

2. The splash-proof liquid adding device according to claim 1, characterized in that: The splash-proof mechanism (2) comprises a first splash-proof buffer (21), a first impact hole (22) being provided at the bottom of the first splash-proof buffer (21), and the first impact hole (22) can prevent liquid nitrogen from splashing.

3. The splash-proof liquid adding device according to claim 2, characterized in that: The splash-proof mechanism (2) is arranged in a cylindrical shape, and an open end is arranged at the upper end.

4. The splash-proof liquid adding device according to claim 2 or 3, characterized in that: The splash-proof mechanism (2) further comprises a second splash-proof buffer (23), wherein the second splash-proof buffer (23) is arranged around the circumference of the first splash-proof buffer (21), and a second buffer chamber (24) is formed between the second splash-proof buffer (23) and the first splash-proof buffer (21).

5. The splash-proof liquid adding device according to claim 4, characterized in that: The second anti-splash buffer (23) is provided with a second through hole (25), and the second through hole (25) allows liquid nitrogen or nitrogen gas to pass through.

6. The splash-proof liquid adding device according to claim 5, characterized in that: The splash-proof mechanism (2) further comprises a third splash-proof buffer (26), wherein the third splash-proof buffer (26) is circumferentially arranged on the side of the second splash-proof buffer (23), a third buffer chamber (27) is formed between the third splash-proof buffer (26) and the second splash-proof buffer (23), and a vent hole (28) is provided on the third splash-proof buffer (26), wherein the vent hole (28) allows nitrogen to pass through.

7. The splash-proof liquid adding device according to claim 1, characterized in that: The rotary liquid adding mechanism (3) comprises a liquid nitrogen moving cylinder (31), a liquid adding pipe (32), and a guide pipe (33); the liquid adding pipe (32) is arranged on the liquid nitrogen moving cylinder (31); the liquid adding pipe (32) is provided with a guide pipe (33); the liquid nitrogen moving cylinder (31) is connected to the liquid storage mechanism (1); the liquid adding pipe (32) is provided with a temperature probe; and a wire can be passed through the guide pipe (33).

8. The splash-proof liquid adding device according to claim 1, characterized in that: It also comprises a lifting drive mechanism (4), wherein the lifting drive mechanism (4) can drive the rotary liquid adding mechanism (3) to move up and down along the liquid storage mechanism (1).

9. The splash-proof liquid adding device according to claim 8, characterized in that: The lifting drive mechanism (4) comprises a lifting drive member (41), a driven member (42), and a connecting member (43). The lower end of the lifting drive member (41) is connected to the driven member (42), and the two ends of the connecting member (43) are respectively connected to the rotating liquid adding mechanism (3) and the driven member (42). The rotation of the driven member (42) can drive the connecting member (43) to rise and fall.

10. The splash-proof liquid adding device according to claim 9, characterized in that: It also comprises a rotating mechanism (5), wherein the rotating mechanism (5) is arranged on the lifting drive mechanism (4), and the rotating mechanism (5) can drive the rotating liquid adding mechanism (3) to rotate.

11. The splash-proof liquid adding device according to claim 10, characterized in that: It also comprises a limiting mechanism (6), wherein the limiting mechanism (6) is arranged on the lifting drive mechanism (4), and the limiting mechanism (6) can limit the rotation angle of the rotating liquid adding mechanism (3).

12. The splash-proof liquid adding device according to claim 11, characterized in that: The limiting mechanism (6) comprises a limiting member (61), a rotating limiting member (62), and a liquid nitrogen moving cylinder (31); the limiting member (61) is arranged on the connecting member (43), the rotating limiting member (62) is arranged on the liquid nitrogen moving cylinder (31), and the limiting member (61) can limit the rotating limiting member (62).

13. The splash-proof liquid adding device according to claim 12, characterized in that: A sensor assembly (8) is arranged on the side of the rotating mechanism (5), and the sensor assembly (8) can detect the lifting distance and the rotation angle of the rotating liquid adding mechanism (3).

14. The splash-proof liquid adding device according to claim 1, characterized in that: The liquid storage mechanism (1) is provided with a liquid inlet (7), and the liquid inlet (7) is in communication with the liquid storage mechanism (1).

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