Gas phase liquid nitrogen tank

Abstract

The embodiment of the invention discloses a gas-phase liquid nitrogen tank, and relates to but is not limited to a biological sample preservation technology. The gas phase liquid nitrogen tank comprises a tank body provided with a cavity, a neck tube and an injection hole, a rotating assembly comprising a rotating shaft and a storage rack, and a detection mechanism. The detection mechanism comprises a capacitor plate and a rod piece. The capacitor plate is contained in the cavity and electrically connected with the neck tube, the rod piece is contained in the hollow cavity of the rotating shaft and the neck tube and electrically connected with the capacitor plate through the neck tube, and the rod piece is arranged to be capable of transmitting capacitance change signals between the capacitor plate and the rod piece to the outside of the gas phase liquid nitrogen tank. In this way, the detection mechanism and the neck tube can form a capacitive liquid level rod sensor, the neck tube is used as a one-pole design of the capacitive liquid level rod sensor, the requirement for high-precision liquid level monitoring can be met, the original structure and functional integrity of equipment are reserved, maximum reservation and minimum transformation of an existing equipment structure are achieved, and the cost is reduced. The method is economical and efficient.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to, but are not limited to, biological sample preservation technology, and in particular to a gas phase liquid nitrogen tank. Background Art

[0002] In the medical field, a stable supply of liquid nitrogen is an indispensable part of the production process. Liquid nitrogen, with its extremely low temperature characteristics, is widely used in many aspects such as biological sample preservation. Therefore, real-time monitoring of liquid nitrogen capacity to ensure the continuity and adequacy of supply has become the key. The reduction of liquid nitrogen in the gas phase liquid nitrogen tank is a gradual and imperceptible process. If you are not careful, you may ignore this subtle change, which will lead to problems of untimely supply. This will not only affect the normal operation of the production line, but may also cause irreparable damage to biological samples. As a common contact measurement method, capacitive level gauges are convenient, but often difficult to meet high-precision requirements due to environmental sensitivity and accuracy limitations. Especially when it comes to liquid nitrogen, a special medium, its low temperature characteristics and volatile nature have exacerbated the measurement challenges. Summary of the invention

[0003] The present disclosure provides a gas phase liquid nitrogen tank, comprising: The tank body is provided with a cavity, a neck tube connected to the cavity, and an injection hole, wherein the injection hole is configured to allow liquid nitrogen to be injected; A rotating assembly, comprising a rotating shaft and a storage rack, wherein the rotating shaft is vertically disposed in the cavity, and both ends of the rotating shaft are respectively connected to the neck tube and the tank body, the rotating shaft has a hollow cavity and is communicated with the neck tube, the storage rack is accommodated in the cavity, and is rotatably connected to the tank body and the neck tube through the rotating shaft; and The detection mechanism includes a capacitor plate and a rod, wherein the capacitor plate is accommodated in the cavity and electrically connected to the neck tube, the rod is accommodated in the neck tube and the hollow cavity, and electrically connected to the capacitor plate through the neck tube, and the rod is configured to transmit a capacitance change signal between the capacitor plate and the rod to the outside of the gas phase liquid nitrogen tank.

[0004] In some embodiments of the gas phase liquid nitrogen tank, the rod includes a body, an elastic component and a conductive member, the body is provided with a hollow groove extending along the axial direction of the body, the elastic component is arranged on the circumferential outside of the body, the body is accommodated in the neck tube and the hollow cavity, the elastic component is elastically clamped between the neck tube and the body, and the body is spaced apart from the rotating shaft and the neck tube, the conductive member is at least partially accommodated in the hollow groove, the conductive member is electrically connected to the body, and is electrically connected to the capacitor plate through the elastic component and the neck tube in turn, and can transmit the capacitance change signal to the outside of the gas phase liquid nitrogen tank.

[0005] In some embodiments of the gas phase liquid nitrogen tank, the body has a first end and a second end arranged vertically up and down, the hollow groove can form a notch at the first end, the conductive member is exposed in the notch, the second end is provided with a base, the base is made of non-metallic material, and the second end is connected to the tank body through the base; The neck tube is communicated with the cavity through the hollow cavity and the base in sequence.

[0006] In some embodiments of the gas phase liquid nitrogen tank, the body includes a first rod segment and a second rod segment connected in sequence, the first rod segment is made of metal material, and the second rod segment is made of non-metal material; The base is arranged on the first rod segment, and the elastic component is arranged on the second rod segment; The hollow slot passes through the second rod segment and extends to the first rod segment, and the conductive member is electrically connected to the first rod segment.

[0007] In some embodiments of the gas phase liquid nitrogen tank, the elastic component includes a sleeve portion and a plurality of elastic arms, the sleeve portion is sleeved on the second rod segment and electrically connected to the conductive member; The plurality of elastic arms are uniformly arranged on the sleeve portion around the axial direction of the second rod segment and elastically abut against the neck tube.

[0008] In some embodiments of the gas phase liquid nitrogen tank, the circumferential outer side of the second rod segment is provided with an annular groove axially arranged around the second rod segment and a plurality of guide grooves extending along the axial direction of the second rod segment; The sleeve portion is annular and at least partially embedded in the annular groove; The multiple elastic arms are arranged in one-to-one correspondence with the multiple guide grooves, and the elastic arm includes a connecting portion, an arc-shaped portion and a guide portion which are connected in sequence, the connecting portion is arranged on the sleeve portion and is partially embedded in the guide groove, the arc-shaped portion protrudes to the side away from the second rod segment and elastically abuts against the neck tube, the guide portion is embedded in the guide groove and can slide relative to the guide groove according to the deformation degree of the arc-shaped portion.

[0009] In some embodiments of the gas phase liquid nitrogen tank, the gas phase liquid nitrogen tank further includes a first temperature sensor, which is accommodated in the hollow groove and electrically connected to the sleeve portion, and the first temperature sensor is configured to monitor temperature changes of the sleeve portion.

[0010] In some embodiments of the gas phase liquid nitrogen tank, the gas phase liquid nitrogen tank further includes a second temperature sensor, an installation groove is provided on the axial outer side of the first rod segment, the second temperature sensor is installed in the installation groove and is electrically connected to the conductive member.

[0011] In some embodiments of the gas phase liquid nitrogen tank, the rod further includes a cover body, and the cover body is disposed on the notch; The cover body is provided with a first through hole and a second through hole which are isolated from each other, the conductive member is passed through the first through hole, and the second through hole is configured to have a space for a tool to enter the hollow groove for temperature measurement.

[0012] In some embodiments of the gas-phase liquid nitrogen tank, the first rod segment and the second rod segment partially overlap, and the size of the overlapping position can be adjusted along the vertical direction.

[0013] In some embodiments of the gas phase liquid nitrogen tank, the circumferential outer side of the neck tube is wrapped with an insulating member, and the capacitor plate is integrated with the insulating member.

[0014] The disclosed embodiment includes a tank body provided with a cavity, a neck tube and an injection hole, a rotating assembly including a rotating shaft and a storage rack, and a detection mechanism. Among them, the detection mechanism includes a capacitor plate and a rod. The capacitor plate is accommodated in the cavity and electrically connected to the neck tube, the rod is accommodated in the hollow cavity of the rotating shaft and the neck tube, and is electrically connected to the capacitor plate through the neck tube, and the rod is configured to be able to transmit the capacitance change signal between the capacitor plate and the rod to the outside of the gas phase liquid nitrogen tank, so that the detection mechanism can form a capacitive liquid level rod sensor with the neck tube. The design of using the neck tube as one pole of the capacitive liquid level rod sensor can not only meet the needs of high-precision liquid level monitoring, but also retain the original structure and functional integrity of the equipment, and realize the maximum retention and minimum modification of the existing equipment structure, which is both economical and efficient.

[0015] As a low-temperature storage device, the neck tube of the gas phase liquid nitrogen tank plays the role of supporting and controlling the rotation of the shaft, and undertakes the important task of connecting the inside and outside and maintaining pressure balance. The capacitive liquid level sensor is widely favored in the field of liquid level monitoring due to its advantages of high precision, high stability and non-contact measurement. The two are cleverly combined, and the neck tube becomes the core component of the capacitive liquid level sensor, realizing the measurement of capacitance without increasing heat conduction and evaporation.

[0016] The disclosed embodiment can not only achieve accurate measurement of liquid nitrogen level, but also effectively avoid the need for additional hole opening or modification caused by the installation of traditional liquid level gauges, reducing maintenance costs and operational complexity. At the same time, the high sensitivity and long life of the capacitive liquid level rod sensor ensure the accuracy of monitoring data and the stability of equipment operation, providing reliable protection for production.

[0017] Moreover, as the other pole of the capacitive liquid level rod sensor, the integral one-piece rod abandons the possible drawbacks of the traditional liquid level rod, such as split assembly and complex interface, avoids looseness and wear between components, and improves the service life and reliability of the capacitive liquid level rod sensor. Through integrated molding, the structure is compact and stable. The integral one-piece rod is not only easy to install, reducing the difficulty and risk of on-site construction, but also greatly simplifies the subsequent maintenance work and improves work efficiency.

[0018] Other features and advantages of the present disclosure will be described in the following description, and partly become apparent from the description, or be understood by implementing the present disclosure. Other advantages of the present disclosure can be realized and obtained by the schemes described in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide an understanding of the technical solution of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the technical solution of the present disclosure and do not constitute a limitation on the technical solution of the present disclosure.

[0020] Figure 1 is a schematic diagram of a gas phase liquid nitrogen tank in an embodiment of the present disclosure; Figure 2 for Figure 1 Middle AA section view; Figure 3 for Figure 2 The enlarged structural diagram of the middle B part; Figure 4 for Figure 2 The enlarged structural diagram of the middle C part; Figure 5 is a schematic cross-sectional view of a rod member in an embodiment of the present disclosure; Figure 6 It is a schematic diagram of the exploded structure of the rod in the embodiment of the present disclosure; Figure 7 for Figure 3 The enlarged structural diagram of the middle D part; Figure 8 for Figure 3 The enlarged structural diagram of the middle E part; Fig. 9 for Figure 3 The enlarged structural diagram of the middle F part; Fig.10 for Figure 3 The enlarged structural diagram of the middle G part; Fig.11 for Figure 3 Schematic diagram of the enlarged structure of the middle H part; Fig.12 It is a schematic diagram of the connection between the main body, conductive parts and control system in the embodiment of the present disclosure.

[0021] Description of Figure Numbers: 10. tank body; 11. inner cylinder; 12. outer cylinder; 20. rotating assembly; 21. rotating shaft; 22. rack; 30. detection mechanism; 31. rod; 311. body; 3111. first rod segment; 3112. second rod segment; 312. elastic assembly; 3121. sleeve portion; 3122. elastic arm; 31221. connecting portion; 31222. arc portion; 31223. guide portion; 313 , conductive part; 314, base; 315, cover body; 40, neck tube; 41, insulating part; 50, control system; 60, first temperature sensor; 70, second temperature sensor; 100, cavity; 200, injection hole; 300, hollow cavity; 400, hollow groove; 401, notch; 500, annular groove; 600, guide groove; 700, mounting groove; 800, first through hole; 900, second through hole. DETAILED DESCRIPTION

[0022] The present disclosure describes multiple embodiments, but the description is exemplary rather than restrictive, and it is obvious to those skilled in the art that there may be more embodiments and implementations within the scope of the embodiments described in the present disclosure. Although many possible feature combinations are shown in the drawings and discussed in the specific embodiments, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with any other feature or element in any other embodiment, or may replace any other feature or element in any other embodiment.

[0023] The present disclosure includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The disclosed embodiments, features, and elements of the present disclosure may also be combined with any conventional features or elements to form a unique invention scheme. Any features or elements of any embodiment may also be combined with features or elements from other invention schemes to form another unique invention scheme. Therefore, it should be understood that any feature shown and / or discussed in the present disclosure may be implemented individually or in any appropriate combination. Therefore, except for the limitations made according to the attached claims and their equivalents, the embodiments are not subject to other restrictions. In addition, various modifications and changes may be made within the scope of protection of the attached claims.

[0024] In addition, when describing representative embodiments, the specification may have presented the method and / or process as a specific sequence of steps. However, to the extent that the method or process does not rely on the specific order of the steps described in the present disclosure, the method or process should not be limited to the steps in the specific order described. As will be understood by those of ordinary skill in the art, other orders of steps are also possible. Therefore, the specific order of the steps set forth in the specification should not be interpreted as a limitation on the claims. In addition, the claims for the method and / or process should not be limited to the steps performed in the order written, and those skilled in the art can easily understand that these orders can be changed and still remain within the spirit and scope of the embodiments of the present disclosure.

[0025] In the medical field, a stable supply of liquid nitrogen is an indispensable part of the production process. Liquid nitrogen, with its extremely low temperature characteristics, is widely used in many aspects such as biological sample preservation. Therefore, real-time monitoring of liquid nitrogen capacity to ensure the continuity and adequacy of supply has become the key. The reduction of liquid nitrogen in the gas phase liquid nitrogen tank is a gradual and imperceptible process. If you are not careful, you may ignore this subtle change, which will lead to problems of untimely supply. This will not only affect the normal operation of the production line, but may also cause irreparable damage to biological samples. As a common contact measurement method, capacitive level gauges are convenient, but often difficult to meet high-precision requirements due to environmental sensitivity and accuracy limitations. Especially when it comes to liquid nitrogen, a special medium, its low temperature characteristics and volatile nature have exacerbated the measurement challenges.

[0026] Please combine Figures 1 to 6 Now, a gas phase liquid nitrogen tank disclosed in an embodiment of the present disclosure is described. The gas phase liquid nitrogen tank includes a tank body 10, a rotating assembly 20 and a detection mechanism 30.

[0027] The tank body 10 is provided with a cavity 100, a neck tube 40 connected to the cavity 100, and an injection hole 200, wherein the injection hole 200 is configured to provide liquid nitrogen injection. The tank body 10 includes an inner cylinder 11 and an outer cylinder 12. Mounting holes are provided at the top center positions of the inner cylinder 11 and the outer cylinder 12. The mounting holes of the outer cylinder 12 and the inner cylinder 11 are both fixedly connected to the neck tube 40. A vacuum cavity is provided between the inner cylinder 11 and the outer cylinder 12. The outer cylinder 12 and the neck tube 40 are also provided with reinforcing ribs to improve the bearing capacity of the outer cylinder 12.

[0028] The rotating assembly 20 includes a rotating shaft 21 and a rack 22. The rotating shaft 21 is vertically disposed in the cavity 100, and the two ends of the rotating shaft 21 are respectively connected to the neck tube 40 and the tank body 10. The rotating shaft 21 has a hollow cavity 300 and is in communication with the neck tube 40. The rack 22 is accommodated in the cavity 100 and is rotatably connected to the tank body 10 and the neck tube 40 through the rotating shaft 21. The rotating shaft 21 can be fixedly connected to the tank body 10 and the neck tube 40. In this case, the rack 22 can be rotatably connected to the rotating shaft 21, so that the rack 22 can rotate relative to the tank body 10 and the neck tube 40. The rotating shaft 21 can also be rotatably connected to the tank body 10 and the neck tube 40. In this case, the rack 22 can be fixedly connected to the rotating shaft 21, so that the rack 22 can rotate relative to the tank body 10 and the neck tube 40 with the rotating shaft 21. The rack 22 can be used to place biological samples, and liquid nitrogen can be injected into the cavity 100 through the injection hole 200 to protect the biological samples.

[0029] In the disclosed embodiment, the rotating shaft 21 can be rotatably connected to the inner cylinder 11 and the neck tube 40 through a bearing. A guide groove is provided at the center of the bottom of the inner cylinder 11, and the rotating shaft 21 can be inserted into the guide groove and rotatably connected to the inner cylinder 11. The setting of the guide groove can limit the swing of the rotating shaft 21 through the inner cylinder 11.

[0030] The detection mechanism 30 includes a capacitor plate and a rod 31. The capacitor plate is accommodated in the cavity 100 and is electrically connected to the neck tube 40. The rod 31 is accommodated in the neck tube 40 and the hollow cavity 300, and is electrically connected to the capacitor plate through the neck tube 40. The rod 31 is configured to transmit the capacitance change signal between the capacitor plate and the rod 31 to the outside of the gas phase liquid nitrogen tank. When the liquid nitrogen level in the cavity 100 changes, the dielectric constant between the capacitor plate and the rod 31 changes accordingly, thereby causing a change in capacitance. This change is converted into a capacitance change signal through the circuit and transmitted to the outside of the gas phase liquid nitrogen tank through the rod 31. After the capacitance change signal is received, real-time monitoring of the liquid nitrogen level can be achieved. Fig.12 As shown, the rod 31 can transmit the capacitance change signal to the control system 50 located outside the gas phase liquid nitrogen tank. The control system 50 can collect the capacitance change signal and also transmit electrical energy to the two poles of the capacitive liquid level rod sensor.

[0031] The detection mechanism 30 can measure and feedback the liquid level information of liquid nitrogen in the cavity 100 in real time. In the cavity 100, as the liquid nitrogen is consumed or replenished, the interface position between the liquid nitrogen and the vapor will change, and this change is accurately captured and converted into a measurable capacitance change signal through the change of the capacitance value. The rod 31 acts as a bridge between the capacitor plate and the control system 50, and bears the heavy responsibility of signal transmission. The rod 31 transmits the capacitance change signal to the control system 50, and the control system 50 quickly analyzes, processes and makes decisions on the received capacitance change signal. When the detection mechanism 30 detects that the liquid level is abnormal, this information is quickly transmitted to the control system 50 through the rod 31, and the control system 50 immediately initiates corresponding measures, such as activating an alarm device or performing other emergency operations to ensure the safe operation of the liquid nitrogen tank.

[0032] The embodiment of the present disclosure includes a tank body 10 provided with a cavity 100, a neck tube 40 and an injection hole 200, a rotating assembly 20 including a rotating shaft 21 and a storage rack 22, and a detection mechanism 30. Among them, the detection mechanism 30 includes a capacitor plate and a rod 31. The capacitor plate is accommodated in the cavity 100 and is electrically connected to the neck tube 40. The rod 31 is accommodated in the hollow cavity 300 of the rotating shaft 21 and the neck tube 40, and is electrically connected to the capacitor plate through the neck tube 40. The rod 31 is configured to be able to transmit the capacitance change signal between the capacitor plate and the rod 31 to the outside of the gas phase liquid nitrogen tank, so that the detection mechanism 30 can form a capacitive liquid level rod sensor with the neck tube 40. The design of using the neck tube 40 as one pole of the capacitive liquid level rod sensor can not only meet the needs of high-precision liquid level monitoring, but also retain the original structure and functional integrity of the equipment, and realize the maximum retention and minimum modification of the existing equipment structure, which is both economical and efficient.

[0033] As a low-temperature storage device, the neck tube 40 of the gas phase liquid nitrogen tank supports and controls the rotation of the shaft 21, and undertakes the important task of connecting the inside and the outside and maintaining pressure balance. The capacitive liquid level sensor is widely favored in the field of liquid level monitoring due to its advantages of high precision, high stability and non-contact measurement. The two are cleverly combined, and the neck tube 40 becomes the core component of the capacitive liquid level sensor, realizing the measurement of capacitance without increasing heat conduction and evaporation.

[0034] The disclosed embodiment can not only achieve accurate measurement of liquid nitrogen level, but also effectively avoid the need for additional hole opening or modification caused by the installation of traditional liquid level gauges, reducing maintenance costs and operational complexity. At the same time, the high sensitivity and long life of the capacitive liquid level rod sensor ensure the accuracy of monitoring data and the stability of equipment operation, providing reliable protection for production.

[0035] Moreover, the integral one-piece rod 31, as the other pole of the capacitive liquid level rod sensor, abandons the disadvantages of the traditional liquid level rod, such as split assembly and complex interface, avoids looseness and wear between components, and improves the service life and reliability of the capacitive liquid level rod sensor. Through integrated molding, the structure is compact and stable. The integral one-piece rod 31 is not only easy to install, reducing the difficulty and risk of on-site construction, but also greatly simplifies the subsequent maintenance work and improves work efficiency.

[0036] In the exemplary embodiment, please combine Figures 3 to 6 and Fig. 9 The rod 31 includes a body 311, an elastic component 312 and a conductive member 313. The body 311 is provided with a hollow groove 400 extending along the axial direction of the body 311, and the elastic component 312 is arranged on the circumferential outer side of the body 311. The body 311 is accommodated in the neck tube 40 and the hollow cavity 300, and the elastic component 312 is elastically clamped between the neck tube 40 and the body 311, so that the body 311 is spaced from the rotating shaft 21 and the neck tube 40. In this way, by setting the elastic component 312, the body 311 and the neck tube 40 can be fixed by utilizing the elastic deformation ability of the elastic component 312, thereby ensuring the position stability of the rod 31. Moreover, it is also convenient to detachably connect the rod 31 and the neck tube 40, and to facilitate the disassembly, assembly, replacement and maintenance of the rod 31. The conductive member 313, as a bridge between the body 311 and the control system 50, undertakes the important task of signal transmission.

[0037] The conductive member 313 is at least partially contained in the hollow groove 400. The conductive member 313 is electrically connected to the body 311, and is electrically connected to the capacitor plate through the elastic component 312 and the neck tube 40 in turn, and can transmit the capacitance change signal to the outside of the gas phase liquid nitrogen tank. In this way, the elastic component 312 has the function of connecting the rod 31 to the neck tube 40, and can also play a conductive role, and can lead out one pole of the capacitive liquid level rod sensor. While the elastic deformation ability of the elastic component 312 is used to ensure the stability of the mechanical connection, the stability of the electrical connection can also be ensured, which simplifies the circuit layout and ensures the stable operation of the capacitive liquid level rod sensor.

[0038] In the exemplary embodiment, please combine Figure 6 , Figure 7 and Fig.11The body 311 has a first end and a second end arranged vertically up and down, and the hollow groove 400 can form a notch 401 at the first end, and the conductive member 313 is exposed in the notch 401 to facilitate the lead-out of the conductive member 313. The second end is provided with a base 314, and the base 314 is made of non-metallic material. The second end is connected to the tank body 10 through the base 314, which realizes the effective isolation of the rod 31 and the tank body 10, which not only ensures the accuracy of the measurement, but also plays a role in stabilizing the rod 31, which not only enhances the stability of the rod 31, but also avoids the heat conduction problem that may be caused by metal materials, and further ensures the storage efficiency of liquid nitrogen.

[0039] The neck tube 40 is connected to the chamber body 100 through the hollow cavity 300 and the base 314 in sequence. Liquid nitrogen may enter the hollow cavity 300 through the hole provided in the base 314 and contact the rod 31.

[0040] In the exemplary embodiment, please combine Figure 5 and Figure 6 The body 311 includes a first rod section 3111 and a second rod section 3112 connected in sequence, and the first rod section 3111 is made of metal. The first rod section 3111 and the neck tube 40 can be used as the two poles of the capacitive liquid level rod sensor. The second rod section 3112 is made of non-metallic material. The base 314 is arranged on the first rod section 3111.

[0041] The elastic component 312 is arranged on the second rod segment 3112, so that the first rod segment 3111 and the capacitor plate can form the two poles of the capacitive liquid level rod sensor. The hollow groove 400 runs through the second rod segment 3112 and extends to the first rod segment 3111, and the conductive member 313 is electrically connected to the first rod segment 3111. In addition, the main body 311 uses rod segments of different materials, which also enables the upper part of the main body 311 made of non-metallic material (for example, plastic material) to reduce heat loss, while the lower part of the main body 311 made of metal material (for example, stainless steel material) can ensure the overall rigidity of the main body 311. This upper and lower combined material design not only ensures the durability of the main body 311, but also effectively reduces the evaporation rate of liquid nitrogen and reduces unnecessary waste.

[0042] In an exemplary embodiment, Fig. 9 As shown, the elastic component 312 includes a sleeve portion 3121 and a plurality of elastic arms 3122, and the sleeve portion 3121 is sleeved on the second rod segment 3112 and electrically connected to the conductive member 313. Thus, the sleeve portion 3121 can increase the connection surface area between the elastic component 312 and the second rod segment 3112, thereby improving the connection stability.

[0043] The multiple elastic arms 3122 are evenly arranged on the sleeve portion 3121 around the axial direction of the second rod segment 3112 and elastically abut against the neck tube 40, so that the second rod segment 3112 is more evenly subjected to the force of the multiple elastic arms 3122, thereby ensuring the position stability of the rod 31.

[0044] In the exemplary embodiment, please combine Figure 8 and Fig. 9 The circumferential outer side of the second rod segment 3112 is provided with an annular groove 500 axially arranged around the second rod segment 3112 and a plurality of guide grooves 600 extending along the axial direction of the second rod segment 3112 .

[0045] The sleeve portion 3121 is annular and at least partially embedded in the annular groove 500, which can further improve the connection stability between the sleeve portion 3121 and the second rod segment 3112 and avoid the axial movement of the sleeve portion 3121 along the second rod segment 3112, which would cause an unstable connection between the rod 31 and the neck tube 40.

[0046] The plurality of elastic arms 3122 are arranged in one-to-one correspondence with the plurality of guide slots 600, and the elastic arm 3122 includes a connecting portion 31221, an arc portion 31222 and a guide portion 31223 which are connected in sequence. The connecting portion 31221 is arranged on the sleeve portion 3121 and is partially embedded in the guide slot 600 to ensure the position accuracy of the connecting portion 31221 relative to the second rod segment 3112, and can cooperate with the second rod segment 3112 to limit the sleeve portion 3121 from rotating along the axial direction of the second rod segment 3112.

[0047] The arc portion 31222 protrudes away from the second rod section 3112 and elastically contacts the neck tube 40. The arc portion 31222 can ensure the elastic deformation performance of the elastic arm 3122, thereby ensuring that the elastic arm 3122 can generate a large elastic force and ensure the connection stability between the rod 31 and the neck tube 40.

[0048] The guide portion 31223 is embedded in the guide groove 600 and can slide relative to the guide groove 600 according to the deformation degree of the arc-shaped portion 31222. In this way, the position stability and deformation stability of the elastic arm 3122 can be ensured by the arrangement of the guide portion 31223, so as to prevent the elastic arm 3122 from rotating relative to the sleeve portion 3121 during the elastic deformation process, thereby preventing the connection between the rod 31 and the neck tube 40 from being unstable.

[0049] In the exemplary embodiment, please combine Figure 5 , Figure 6 , Fig. 9 and Fig.10The gas phase liquid nitrogen tank further includes a first temperature sensor 60 , which is received in the hollow groove 400 and electrically connected to the sleeve portion 3121 . The first temperature sensor 60 is configured to monitor temperature changes of the sleeve portion 3121 .

[0050] The gas phase liquid nitrogen tank further includes a second temperature sensor 70 . An installation groove 700 is provided on the axial outer side of the first rod segment 3111 . The second temperature sensor 70 is installed in the installation groove 700 and is electrically connected to the conductive member 313 .

[0051] In this way, the monitoring accuracy can be further improved by setting the first temperature sensor 60 and the second temperature sensor 70. The first temperature sensor 60 and the second temperature sensor 70 are respectively located at the upper part and the bottom plate of the rack 22. This layout fully takes into account the types and height differences of different gas phase liquid nitrogen tanks, making the temperature measurement more accurate and able to be flexibly adjusted according to different situations. At the same time, this also ensures that the same type of gas phase liquid nitrogen tanks can maintain a consistent measurement position when monitoring the temperature, enhancing the comparability and reliability of the data.

[0052] In an exemplary embodiment, Figure 7 As shown, the rod 31 also includes a cover 315. The cover 315 is covered on the notch 401. The cover 315 is provided with a first through hole 800 and a second through hole 900 that are isolated from each other. The conductive member 313 is passed through the first through hole 800, so that the conductive member 313 can be limited by the cover 315, thereby ensuring the stability of the connection between the conductive member 313 and the outside world. The second through hole 900 is configured to have a space for a tool to enter the hollow groove 400 for temperature measurement, so that the user or a third party can perform temperature calibration and measurement work, further improving the convenience of the product.

[0053] In the embodiment of the present disclosure, the conductive member 313 may be a cable, which may have a plurality of conductors, which are electrically connected to the capacitor plate, the first rod segment 3111, the first temperature sensor 60, the second temperature sensor 70, etc., respectively, and can provide electrical energy and transmit electrical signals. The cable may be a coaxial cable, which not only has excellent low temperature resistance, but also can effectively resist electromagnetic interference to ensure the accuracy and stability of the signal during transmission.

[0054] In an exemplary embodiment, Fig. 9As shown, the first rod segment 3111 and the second rod segment 3112 partially overlap, and the size of the overlapping position can be adjusted in the vertical direction to achieve flexible adaptation of gas-phase liquid nitrogen tanks of different heights. No matter what height of the gas-phase liquid nitrogen tank is faced, the rod 31 can be perfectly adapted through simple adjustment without the need to re-prepare materials, which greatly improves the versatility and practicality of the rod 31. In the embodiment of the present disclosure, the overlapping position of the first rod segment 3111 and the second rod segment 3112 is connected by a thread, which not only enhances the stability of the connection between the first rod segment 3111 and the second rod segment 3112, but also gives the rod 31 a certain ability to adjust the height.

[0055] In an exemplary embodiment, the circumferential outer side of the neck tube 40 is wrapped with an insulating member 41 to provide heat insulation to prevent heat from being transferred outward through the neck tube 40, especially the neck tube 40 made of metal (high thermal conductivity). The capacitor plate is integrated with the insulating member 41. The insulating member 41 may be made of glass fiber. The capacitor plate may be connected to the insulating member 41 by interference fit.

[0056] In the description of the present disclosure, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the referred device or element 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 disclosure.

[0057] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include at least one of the features.

[0058] In the description of the present disclosure, “plurality” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0059] In the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connection" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0060] In the present disclosure, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. 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 disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0062] Although the embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure.

Claims

1. A gas phase liquid nitrogen tank, characterized in that: include: The tank body is provided with a cavity, a neck tube connected to the cavity, and an injection hole, wherein the injection hole is configured to allow liquid nitrogen to be injected; A rotating assembly, comprising a rotating shaft and a storage rack, wherein the rotating shaft is vertically disposed in the cavity, and the two ends of the rotating shaft are respectively connected to the neck tube and the tank body, the rotating shaft has a hollow cavity and is communicated with the neck tube, the storage rack is accommodated in the cavity, and is rotatably connected to the tank body and the neck tube through the rotating shaft; and The detection mechanism includes a capacitor plate and a rod, wherein the capacitor plate is accommodated in the cavity and electrically connected to the neck tube, the rod is accommodated in the neck tube and the hollow cavity, and electrically connected to the capacitor plate through the neck tube, and the rod is configured to transmit a capacitance change signal between the capacitor plate and the rod to the outside of the gas phase liquid nitrogen tank.

2. The gas phase liquid nitrogen tank according to claim 1, characterized in that: The rod member includes a body, an elastic component and a conductive member. The body is provided with a hollow groove extending along the axial direction of the body. The elastic component is arranged on the circumferential outer side of the body. The body is accommodated in the neck tube and the hollow cavity. The elastic component is elastically clamped between the neck tube and the body to space the body, the rotating shaft and the neck tube. The conductive member is at least partially accommodated in the hollow groove. The conductive member is electrically connected to the body, and is electrically connected to the capacitor plate through the elastic component and the neck tube in sequence, and can transmit the capacitance change signal to the outside of the gas phase liquid nitrogen tank.

3. The gas phase liquid nitrogen tank according to claim 2, characterized in that: The body has a first end and a second end arranged vertically up and down, the hollow groove can form a notch at the first end, the conductive member is exposed in the notch, the second end is provided with a base, the base is made of non-metallic material, and the second end is connected to the tank body through the base; The neck tube is communicated with the cavity through the hollow cavity and the base in sequence.

4. The gas phase liquid nitrogen tank according to claim 3, characterized in that: The body comprises a first rod segment and a second rod segment connected in sequence, the first rod segment is made of metal material, and the second rod segment is made of non-metal material; The base is arranged on the first rod segment, and the elastic component is arranged on the second rod segment; The hollow slot passes through the second rod segment and extends to the first rod segment, and the conductive member is electrically connected to the first rod segment.

5. The gas phase liquid nitrogen tank according to claim 4, characterized in that: The elastic component comprises a sleeve portion and a plurality of elastic arms, wherein the sleeve portion is sleeved on the second rod segment and electrically connected to the conductive member; The plurality of elastic arms are uniformly arranged on the sleeve portion around the axial direction of the second rod segment and elastically abut against the neck tube.

6. The gas phase liquid nitrogen tank according to claim 5, characterized in that: The circumferential outer side of the second rod segment is provided with an annular groove axially arranged around the second rod segment and a plurality of guide grooves extending along the axial direction of the second rod segment; The sleeve portion is annular and at least partially embedded in the annular groove; The multiple elastic arms are arranged in one-to-one correspondence with the multiple guide grooves, and the elastic arm includes a connecting portion, an arc-shaped portion and a guide portion which are connected in sequence, the connecting portion is arranged on the sleeve portion and is partially embedded in the guide groove, the arc-shaped portion protrudes to the side away from the second rod segment and elastically abuts against the neck tube, the guide portion is embedded in the guide groove and can slide relative to the guide groove according to the deformation degree of the arc-shaped portion.

7. The gas phase liquid nitrogen tank according to claim 6, characterized in that: The gas phase liquid nitrogen tank further includes a first temperature sensor, which is received in the hollow groove and electrically connected to the sleeve portion, and is configured to monitor temperature changes of the sleeve portion.

8. The gas phase liquid nitrogen tank according to claim 6 or 7, characterized in that: The gas phase liquid nitrogen tank further includes a second temperature sensor. An installation groove is provided on the axial outer side of the first rod segment. The second temperature sensor is installed in the installation groove and is electrically connected to the conductive member.

9. The gas phase liquid nitrogen tank according to claim 8, characterized in that: The rod also includes a cover body, and the cover body is covered on the notch; The cover body is provided with a first through hole and a second through hole which are isolated from each other, the conductive member is passed through the first through hole, and the second through hole is configured to have a space for a tool to enter the hollow groove for temperature measurement.

10. The gas phase liquid nitrogen tank according to claim 4, characterized in that: The first rod segment and the second rod segment partially overlap, and the size of the overlapping position can be adjusted along the vertical direction.

11. The gas phase liquid nitrogen tank according to claim 1, characterized in that: The circumferential outer side of the neck tube is wrapped with an insulating member, and the capacitor plate is integrated with the insulating member.

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