Intelligent liquid nitrogen tank cover
By integrating a capacitive level sensor and a temperature sensor onto the liquid nitrogen tank lid, the problem of low reliability in liquid nitrogen tank level monitoring is solved, achieving highly adaptable and reliable level monitoring.
Patent Information
- Application Number
- CN202520167645.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-01-24
AI Technical Summary
Existing liquid nitrogen tank level monitoring systems have low reliability and are easily affected by the liquid nitrogen tank itself and the external environment.
It adopts an integrated design of capacitive liquid level sensor and temperature sensor. The capacitive liquid level sensor is in direct contact with liquid nitrogen, and the temperature sensor is flush with the highest point of the liquid surface, realizing dual data measurement and parameter calibration.
It improves the robustness and reliability of liquid level monitoring, reduces the impact of external environment, and does not require modification of liquid nitrogen tanks; the tank lid can be directly replaced.
Smart Images
Figure CN223690856U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to low temperature storage equipment technical field, especially intelligent liquid nitrogen tank cover. BACKGROUND
[0002] In the field of human assisted reproduction, the low temperature frozen preservation of embryos, ova and sperm is an important component, and liquid nitrogen with extremely low temperature can be used as refrigerant to rapidly freeze and preserve embryos, ova and sperm.
[0003] These samples are generally stored in liquid nitrogen tanks and preserved in a liquid nitrogen environment at minus 196 degrees Celsius. The stable low-temperature environment obtained by the samples in the liquid nitrogen tank is the key to affecting the quality of sperm preservation. In order to ensure the quality of the sample, it is necessary to ensure that the liquid level in the liquid nitrogen tank is not lower than the warning value.
[0004] In the prior art, for the liquid level detection of the liquid nitrogen tank, a platinum resistance temperature sensor is placed at a certain position in the liquid nitrogen tank, and the liquid level of the liquid nitrogen is obtained by detecting the change of the resistance value of the platinum resistance temperature sensor when it is immersed in the liquid nitrogen or not. However, this method is easily affected by the tank body of the liquid nitrogen tank and the external environment, and has low reliability. UTILITY MODEL CONTENTS
[0005] The utility model aims at providing a kind of intelligent liquid nitrogen tank cover to solve the problem of low reliability of the liquid level monitoring of existing liquid nitrogen tank.
[0006] To solve the above technical problems, the utility model provides a kind of intelligent liquid nitrogen tank cover, it includes: tank cover main body, capacitive liquid level sensor and temperature sensor;The tank cover main body is used to cover in liquid nitrogen tank;The capacitive liquid level sensor is set to the side of the tank cover main body towards liquid nitrogen tank, and extends towards the direction of the liquid nitrogen tank;The temperature sensor is located at the side of the tank cover main body towards liquid nitrogen tank, and the position is fixed relative to the capacitive liquid level sensor, and the temperature sensor is configured to be flush with the set liquid surface highest point.
[0007] Optionally, the tank cover main body includes upper cover and lower cover connected along the axial direction of itself, and further includes heat preservation foam;The lower cover is connected to the side of the upper cover towards liquid nitrogen tank, and the capacitive liquid level sensor is connected to the lower cover;The heat preservation foam is circumferentially surrounded at least part of the area of the lower cover, and wraps a part of the capacitive liquid level sensor;The radial outer dimension of the heat preservation foam is less than the radial outer dimension of the upper cover.
[0008] Optionally, the intelligent liquid nitrogen tank cover further includes a master control unit, and the master control unit is arranged in the space surrounded by the upper cover and the lower cover, and is electrically connected with the capacitive liquid level sensor and the temperature sensor.
[0009] Optionally, the capacitive liquid level sensor extends along an axial direction of the tank cover body, and the temperature sensor is fixed to the capacitive liquid level sensor.
[0010] Optionally, the temperature sensor is configured to calibrate a measurement parameter of the capacitive liquid level sensor.
[0011] Optionally, the intelligent liquid nitrogen tank cover further comprises a flexible chain, one end of the flexible chain is detachably connected with the liquid nitrogen tank, and the other end is detachably locked with the tank cover body.
[0012] Optionally, the tank cover body comprises an electromagnetic lock, the flexible chain comprises a lock catch matched with the electromagnetic lock, and the lock catch is used to lock with the electromagnetic lock.
[0013] Optionally, the tank cover body further comprises a mechanical lock, and the mechanical lock is used to unlock the electromagnetic lock and the lock catch.
[0014] Optionally, the flexible chain comprises a clamping portion, and the clamping portion comprises at least two clamping blocks used to clamp a handle of the liquid nitrogen tank.
[0015] Optionally, the flexible chain comprises a folding arm, a clamping portion and a lock catch, the folding arm is connected with the clamping portion and the lock catch at two ends of the folding arm along an axial direction of the folding arm, the folding arm comprises two arm segments oppositely arranged along the axial direction of the folding arm, and axial opposite positions of the two arm segments are adjustably arranged to adjust relative distances between the clamping portion and the lock catch.
[0016] In summary, the intelligent liquid nitrogen tank cover comprises a tank cover body, a capacitive liquid level sensor and a temperature sensor, the tank cover body is used to cover the liquid nitrogen tank, the capacitive liquid level sensor is arranged on one side of the tank cover body facing the liquid nitrogen tank and extends towards the liquid nitrogen tank, the temperature sensor is located on one side of the tank cover body facing the liquid nitrogen tank and is fixed relative to the capacitive liquid level sensor, and the temperature sensor is configured to be flush with a set highest liquid level.
[0017] So configured, the first aspect adopts a capacitive liquid level sensor, a surface of the capacitive liquid level sensor directly contacts liquid nitrogen, a change in the liquid level height causes a change in the contact area of the capacitive liquid level sensor with the liquid nitrogen, direct change data of the capacitance value is obtained, and the liquid level height value is corresponded, and the liquid level height value is not susceptible to the influence of the external environment. The second aspect, the temperature sensor and the capacitive liquid level sensor can realize double data measurement, and the robustness is effectively improved. The third aspect, the temperature sensor is arranged at the highest point of the liquid surface, and can assist in calibrating the capacitive liquid level sensor, correcting the parameter drift of the capacitive liquid level sensor during long-term use, and improving the reliability of liquid level monitoring. The fourth aspect, the tank cover body, the capacitive liquid level sensor and the temperature sensor are integrated and designed as a whole, without the need to modify the liquid nitrogen tank, without damaging the original liquid nitrogen tank, and can be directly replaced with the tank cover of the liquid nitrogen tank, and the adaptability is high. BRIEF DESCRIPTION OF DRAWINGS
[0018] Those skilled in the art will understand that the provided drawings are for the purpose of better illustrating the present utility model and do not constitute any limitation on the scope of the present utility model.
[0019] Figure 1 is a schematic diagram of a liquid nitrogen tank system of an embodiment of the present utility model.
[0020] Figure 2 is a schematic diagram of an intelligent liquid nitrogen tank cover of an embodiment of the present utility model.
[0021] Figure 3 is a schematic diagram of a tank cover body, a capacitive liquid level sensor and a temperature sensor of an embodiment of the present utility model.
[0022] Figure 4 is a side view of a tank cover body, a capacitive liquid level sensor and a temperature sensor of an embodiment of the present utility model.
[0023] Figure 5 is a top view of a tank cover body of an embodiment of the present utility model.
[0024] Figure 6 is an exploded schematic diagram of a lower cover, a capacitive liquid level sensor and a temperature sensor of an embodiment of the present utility model.
[0025] Figure 7 is a schematic diagram of a soft chain of an embodiment of the present utility model.
[0026] Figure 8 is a side view of a soft chain of an embodiment of the present utility model.
[0027] In the drawings:
[0028] 01-intelligent liquid nitrogen tank cover; 011-handle; 02-liquid nitrogen tank; 10-tank cover main body; 11-upper cover; 111-lifting handle; 112-removable battery; 113-screen; 114-USB interface; 115-indicator light assembly; 116-bolt; 12-lower cover; 121-connection part; 122-sensor support; 13-thermal insulation foam; 14-electromagnetic lock; 15-mechanical lock; 20-capacitive liquid level sensor; 30-temperature sensor; 40-main control unit; 50-soft chain; 51-lock catch; 52-clamping part; 521-clamping block; 53-folding arm; 531-arm section; 532-adjusting hole. DETAILED DESCRIPTION
[0029] In order to make the purpose, advantages and characteristics of the present application more clear, the present application will be further described in detail below in combination with the drawings and specific embodiments. It should be noted that the drawings are all very simplified and not drawn in proportion, and are only used to facilitate and clarify the purpose of assisting the description of the embodiments of the present application. In addition, the structures shown in the drawings are often part of the actual structure. In particular, the emphasis of each drawing needs to be different, and sometimes different proportions are used.
[0030] As used in the present utility model, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. The term "or" is generally employed in its sense including "and / or" unless the context clearly dictates otherwise. The term "plurality" is generally employed in its sense including "two or more" unless the context clearly dictates otherwise. The terms "first," "second," "third," etc. are used only to describe different instances and do not imply or suggest relative importance or an implied indication of the number of the technical features indicated. Thus, features qualified with "first," "second," "third" can explicitly or implicitly include one or at least two of the features. The terms "one end" and "the other end" and "proximal end" and "distal end" generally refer to two corresponding parts, which include not only the end points. In addition, as used in the present utility model, "mounting", "connection", "connection", "one element is provided in another element" should be understood broadly, and generally only indicates that there is a connection, coupling, cooperation or transmission relationship between the two elements, and the two elements can be directly or indirectly connected, coupled, cooperated or transmitted through intermediate elements, and cannot be understood as indicating or suggesting the spatial position relationship between the two elements, that is, one element can be in any direction inside, outside, above, below or one side of another element, unless the content is otherwise clearly indicated. For ordinary skilled persons in the art, the specific meaning of the above terms in the present utility model can be understood according to the specific circumstances. In addition, directional terms such as above, below, up, down, upward, downward, left, right, etc. are used with respect to the exemplary embodiments as they are shown in the drawings, upward or upward direction is towards the top of the corresponding drawing, and downward or downward direction is towards the bottom of the corresponding drawing.
[0031] The utility model aims at providing a kind of intelligent liquid nitrogen tank cover to solve the problem of low reliability of the liquid level monitoring of existing liquid nitrogen tank.
[0032] Please refer to Figures 1 to 8 The utility model embodiment provides a kind of liquid nitrogen tank system, it includes intelligent liquid nitrogen tank cover 01 and liquid nitrogen tank 02.The specific structure and principle of liquid nitrogen tank 02 can refer to prior art, and the caliber of its tank mouth can be 50mm, 80mm, 125mm or 216mm, for example.
[0033] Please refer to Figure 1 And Figure 2The utility model embodiment provides a kind of intelligent liquid nitrogen tank cover 01, it includes tank cover main body 10, capacitance liquid level sensor 20 and temperature sensor 30;The tank cover main body 10 is used to cover in liquid nitrogen tank 02;Capacitance liquid level sensor 20 is set to the side of the tank cover main body 10 towards liquid nitrogen tank 02, and extend towards the direction in the liquid nitrogen tank 02;Temperature sensor 30 is located the side of the tank cover main body 10 towards liquid nitrogen tank 02, and relative to the position of capacitance liquid level sensor 20 fixed, temperature sensor 30 is configured to be flush with the set liquid surface highest point.
[0034] The size of tank cover main body 10 can be matched according to the caliber of the tank opening of liquid nitrogen tank 02, which can be covered in the tank opening of liquid nitrogen tank 02. Capacitance liquid level sensor 20 and temperature sensor 30 are both arranged on the inner side of the tank cover main body 10 towards liquid nitrogen tank 02. Among them, capacitance liquid level sensor 20 is used to extend into liquid nitrogen tank 02 and partially immerse in liquid nitrogen, the surface of capacitance liquid level sensor 20 directly contacts with liquid nitrogen, and the change of liquid level height causes the change of contact area of capacitance liquid level sensor 20 with liquid nitrogen, so as to obtain direct capacitance value change data corresponding to liquid level height value, which is not easily affected by external environment.
[0035] Temperature sensor 30 is preferably but not limited to platinum resistance temperature sensor. It is configured to be flush with the set liquid surface highest point, that is, when the liquid level of liquid nitrogen reaches the set highest liquid surface, it can be immersed by liquid nitrogen, and at this time, the temperature measured by temperature sensor 30 is the standard temperature of liquid nitrogen, i.e. -196℃. Therefore, double data measurement can be realized by temperature sensor 30 and capacitance liquid level sensor 20, which effectively improves the robustness of liquid level monitoring.
[0036] Further, the temperature sensor 30 is configured to calibrate the measurement parameters of the capacitance liquid level sensor 20. Since the temperature sensor 30 is configured at the highest liquid level, the detected highest liquid level can be used to compare with the liquid level height value detected by the capacitance liquid level sensor 20 at this time, and then correct the difference. Therefore, temperature sensor 30 is also used to assist in calibrating capacitance liquid level sensor 20, correct the parameter drift of capacitance liquid level sensor 20 during long-term use, and improve the reliability of liquid level monitoring.
[0037] In addition, the tank cover main body 10, capacitance liquid level sensor 20 and temperature sensor 30 of the intelligent liquid nitrogen tank cover 01 of the embodiment are integrated and designed, without modification of liquid nitrogen tank 02, without damage to the original liquid nitrogen tank 02, which can be directly replaced with the tank cover of liquid nitrogen tank 02, with high adaptability.
[0038] Please refer to Figures 3 to 6Optionally, the can cover body 10 comprises an upper cover 11 and a lower cover 12 connected along the axial direction of the body, and a heat preservation foam 13; the lower cover 12 is connected to the side of the upper cover 11 facing the liquid nitrogen tank 02, and the capacitive liquid level sensor 20 is connected to the lower cover 12; the heat preservation foam 13 circumferentially surrounds at least part of the area of the lower cover 12 and wraps part of the capacitive liquid level sensor 20; the radial outer dimension of the heat preservation foam 13 is smaller than the radial outer dimension of the upper cover 11.
[0039] In some embodiments, for the convenience of assembly, the can cover body 10 is divided into an upper cover 11 (see Figure 3 ) and a lower cover 12 (see Figure 6 ) which can be detachably assembled. The outer contour of the upper cover 11 is generally cylindrical, and the side thereof facing the liquid nitrogen tank 02 is detachably assembled and connected with the lower cover 12 along the axial direction, and preferably, after the assembly and connection of the upper cover 11 and the lower cover 12, a certain closed space is formed in the interior thereof. In a preferred exemplary embodiment, the intelligent liquid nitrogen tank cover 01 further comprises a master control unit 40 (see Figure 6 ) which is, for example, a mainboard comprising a single-chip microcomputer or a logic control device. The master control unit 40 is preferably arranged in the space enclosed by the upper cover 11 and the lower cover 12.
[0040] The main body part of the upper cover 11 can be made of resin material, and the upper cover 11 is provided with a handle 111, a detachable battery 112, a screen 113, a USB interface 114 and an indicator light assembly 115, etc. The handle 111 can be made of aluminum alloy material and is configured to be storable for the operator to hold. The detachable battery 112 is used to supply power to the electronic module units such as the capacitive liquid level sensor 20, the temperature sensor 30 and the master control unit 40. The detachable battery 112 is made of resin material and low-temperature battery core, and is preferably provided with a pressing disassembly structure and can be powered on by pressing. The screen 113 is communicatively connected with the master control unit 40 or communicatively connected with the capacitive liquid level sensor 20 and the temperature sensor 30, and is used to display the liquid level data. In an exemplary embodiment, the screen 113 can be a low-energy-consumption electronic ink screen which is only refreshed for display after the data changes. The USB interface 114 is communicatively connected with the master control unit 40 and is used for device debugging or maintenance. The indicator light assembly 115 comprises indicator lights and light guide columns, and the indicator lights can be integrated on the mainboard of the master control unit 40 or attached to the upper cover 11. The indicator light assembly 115 can express some indication signals such as liquid level warning signals through light display.
[0041] Please refer to Figure 6In one example, the lower cover 12 comprises a connecting portion 121 and a sensor holder 122 arranged in sequence along the axial direction. The connecting portion 121 and the sensor holder 122 are preferably coaxially arranged. The connecting portion 121 has a relatively large radial dimension, and the sensor holder 122 has a relatively small radial dimension. The connecting portion 121 is used for assembly connection with the upper cover 11. Please refer to Figure 3 For example, in one example, the connecting portion 121 is assembled with the upper cover 11 by means of the bolt 116. After the assembly of the connecting portion 121 and the upper cover 11, a closed space for accommodating the main control unit 40 is formed. Further, after the assembly of the connecting portion 121 and the upper cover 11, the sealing effect can be further improved by gluing. The capacitive liquid level sensor 20 is connected to the sensor holder 122 and electrically connected to the main control unit 40. For example, the capacitive liquid level sensor 20 extends into the connecting portion 121 through a wire and is connected to the main control unit 40. Optionally, the connecting portion 121 and the sensor holder 122 are preferably made of resin material.
[0042] The heat preservation foam 13 circumferentially surrounds at least part of the lower cover 12. Please refer to Figure 4 In one example, the heat preservation foam 13 can wrap the sensor holder 122. The top end of the heat preservation foam 13 is flush with the lower end of the connecting portion 121 (i.e. the lower end of the upper cover 11). The heat preservation foam 13 further extends towards the inside of the liquid nitrogen tank 02 and wraps part of the capacitive liquid level sensor 20. The radial outer dimension of the heat preservation foam 13 matches the inner diameter of the tank opening of the liquid nitrogen tank 02. The heat preservation foam 13, for example, can be made of high-density eps material, which has the characteristics of high strength, light weight, and excellent heat preservation performance. The radial outer dimension of the heat preservation foam 13 is smaller than the radial outer dimension of the upper cover 11, so that after assembly, the entire intelligent liquid nitrogen tank cover 01 will not fall into the liquid nitrogen tank 02 when it is closed on the tank opening of the liquid nitrogen tank 02.
[0043] In one preferred example, the capacitive liquid level sensor 20 extends along the axial direction of the tank cover body 10, and the temperature sensor 30 is fixed on the capacitive liquid level sensor 20. Further, the temperature sensor 30 is electrically connected to the main control unit 40. For example, the capacitive liquid level sensor 20 extends into the connecting portion 121 through a wire and is connected to the main control unit 40.
[0044] In one example, the main control unit 40 is built-in with a program which, when executed, measures the liquid level in the liquid nitrogen tank 02 and the temperature at a fixed position in the tank (at the position of the temperature sensor 30) periodically; when the liquid level or the temperature exceeds a set threshold, an alarm is triggered, such as a warning sound or a flashing light assembly 115. Further, in some embodiments, the main control unit 40 further comprises a wireless transmission module (not shown, such as a 433 module or a Bluetooth module, etc.) which can communicate wirelessly with a software client for the operator to monitor in real time synchronously in the software client. Further, the set threshold of the liquid level and the temperature can be set in the software client. Thus, the daily inspection workload of the operator is reduced, the work efficiency is improved, and the safety of the sample is improved.
[0045] Please refer to Figure 7 and Figure 8 , and in combination with reference to Figures 1 to 3 , the intelligent liquid nitrogen tank cover 01 further comprises a soft chain 50; one end of the soft chain 50 is used for detachable connection with the liquid nitrogen tank 02, and the other end is detachably locked with the tank cover body 10. In order to facilitate the fixation and replacement of the intelligent liquid nitrogen tank cover 01, the intelligent liquid nitrogen tank cover 01 provided in the embodiment further comprises a soft chain 50. One end of the soft chain 50 can be assembled and fixed with the existing liquid nitrogen tank 02, and the other end can be used to lock the tank cover body 10, so that the intelligent liquid nitrogen tank cover 01 can be reliably locked on the liquid nitrogen tank 02. And the soft chain 50 has good adaptability and can be adapted to different liquid nitrogen tanks 02, facilitating popularization and application.
[0046] Optionally, the tank cover body 10 comprises an electromagnetic lock 14, and the soft chain 50 comprises a lock catch 51 matched with the electromagnetic lock 14, and the lock catch 51 is used for locking with the electromagnetic lock 14. The electromagnetic lock 14 can be provided on the top surface of the upper cover 11 or the inner wall of the side edge, which is in communication connection with the main control unit 40 and is used for being opened and locked under the control of the main control unit 40. The operator can control the electromagnetic lock 14 through the software client. When the lock catch 51 of the soft chain 50 is inserted into the electromagnetic lock 14 and the electromagnetic lock 14 is locked under the control of the main control unit 40, the lock catch 51 is locked in the electromagnetic lock 14 and cannot be taken out, at this time the intelligent liquid nitrogen tank cover 01 is locked on the liquid nitrogen tank 02. When the electromagnetic lock 14 is opened under the control of the main control unit 40, the locking of the lock catch 51 is released, and the lock catch 51 can be taken out of the electromagnetic lock 14, so that the locking relationship between the intelligent liquid nitrogen tank cover 01 and the liquid nitrogen tank 02 is released, and the operator can hold the handle 111 to separate the intelligent liquid nitrogen tank cover 01 from the liquid nitrogen tank 02.
[0047] Please refer to Figure 3Further, the can lid body 10 further comprises a mechanical lock 15, which is used to unlock the electromagnetic lock 14 and the lock catch 51. The mechanical lock 15 is preferably equipped with a unified key, which is used to open the electromagnetic lock 14 in special cases, so as to release the locking of the lock catch 51 by the electromagnetic lock 14. The priority of the mechanical lock 15 is higher than that of the electromagnetic lock 14. In some special cases, for example, when the electric quantity of the detachable battery 112 is exhausted, and the electromagnetic lock 14 is locked to the lock catch 51, the mechanical lock 15 with higher priority can be used to open the electromagnetic lock 14 and release the locking of the lock catch 51. A plurality of intelligent liquid nitrogen can lids 01 can be equipped with a unified key, which is convenient for the operator to manage.
[0048] Optionally, the soft chain 50 comprises a clamping portion 52; the clamping portion 52 comprises at least two clamping blocks 521, and the at least two clamping blocks 521 are used to clamp the handle 011 of the liquid nitrogen can 01. Please refer to Figure 1 and Figure 7 The liquid nitrogen can 01 in the prior art is usually provided with a handle 011 for convenient carrying. The clamping portion 52 is fixed on the handle 011 by clamping, so that one end of the soft chain 50 is connected to the liquid nitrogen can 01.
[0049] In the exemplary embodiment shown in Figure 7 and Figure 8 The clamping portion 52 comprises two clamping blocks 521, which are arranged in opposite positions and can be fastened to each other by screws, so as to be reliably clamped on the handle 011. In other embodiments, the clamping portion 52 is not limited to comprising only two clamping blocks 521, but can comprise a plurality of clamping blocks, which can be fastened by a circumferential hoop. The present embodiment is not limited in this regard.
[0050] Optionally, the soft chain 50 further comprises a folding arm 53, which is connected to the clamping portion 52 and the lock catch 51 at two ends along the axial direction of the folding arm 53; the folding arm 53 comprises two arm segments 531 arranged in opposite positions along the axial direction, and the axial opposite positions of the two arm segments 531 are adjustably arranged, so as to adjust the relative distance between the clamping portion 52 and the lock catch 51. In an exemplary embodiment, a plurality of adjustment holes 532 are arranged on the two arm segments 531. By aligning and locking different adjustment holes 532, the axial opposite positions of the two arm segments 531 can be adjusted, which is equivalent to adjusting the length of the folding arm 53 along the axial direction. In this way, the folding arm 53 can be adapted to liquid nitrogen cans 01 of different models and different sizes, and to different installation positions of the handle 011.
[0051] In summary, the intelligent liquid nitrogen tank cover provided by the utility model comprises a tank cover main body, a capacitive liquid level sensor and a temperature sensor; the tank cover main body is used for covering the liquid nitrogen tank; the capacitive liquid level sensor is arranged on the side of the tank cover main body facing the liquid nitrogen tank and extends towards the liquid nitrogen tank; the temperature sensor is located on the side of the tank cover main body facing the liquid nitrogen tank and is fixed relative to the position of the capacitive liquid level sensor, and the temperature sensor is configured to be flush with the highest liquid level. In this way, the first aspect adopts the capacitive liquid level sensor, the surface of the capacitive liquid level sensor directly contacts the liquid nitrogen, the change of the liquid level height causes the change of the contact area of the capacitive liquid level sensor and the liquid nitrogen, direct change data of the capacitance value is obtained, the liquid level height value is corresponded, and the liquid level height value is not easily affected by the external environment. The second aspect, the temperature sensor and the capacitive liquid level sensor can realize double data measurement, and the robustness is effectively improved. The third aspect, the temperature sensor is configured at the highest liquid level, can assist in calibrating the capacitive liquid level sensor, corrects the parameter drift of the capacitive liquid level sensor during long-term use, and improves the reliability of the liquid level monitoring. The fourth aspect, the tank cover main body, the capacitive liquid level sensor and the temperature sensor are integrated and designed, the liquid nitrogen tank does not need to be modified, the original liquid nitrogen tank is not damaged, the tank cover of the liquid nitrogen tank can be directly replaced, and the adaptability is high.
[0052] It should be noted that the above several embodiments can be combined with each other. The above description is only a description of the preferred embodiments of the utility model, and does not limit the scope of the utility model in any way. Any modification or modification made by a person skilled in the art according to the above disclosure is within the protection scope of the utility model.
Claims
1. An intelligent liquid nitrogen tank cover, characterized in that, The application relates to an intelligent liquid nitrogen tank cover, which comprises a tank cover body, a capacitive liquid level sensor and a temperature sensor; the tank cover body is used for covering a liquid nitrogen tank; the capacitive liquid level sensor is arranged on the side of the tank cover body facing the liquid nitrogen tank and extends towards the liquid nitrogen tank; the temperature sensor is arranged on the side of the tank cover body facing the liquid nitrogen tank and is fixed relative to the position of the capacitive liquid level sensor, and the temperature sensor is configured to be flush with the highest liquid level. The tank cover body comprises an upper cover and a lower cover connected along the axial direction of the tank cover body, and further comprises heat preservation foam; the lower cover is connected to the side of the upper cover facing the liquid nitrogen tank, and the capacitive liquid level sensor is connected to the lower cover.
2. The intelligent liquid nitrogen tank cover according to claim 1, wherein, The heat preservation foam circumferentially surrounds at least part of the lower cover and wraps part of the capacitive liquid level sensor; the radial outer dimension of the heat preservation foam is smaller than the radial outer dimension of the upper cover. The intelligent liquid nitrogen tank cover further comprises a master control unit arranged in the space surrounded by the upper cover and the lower cover and electrically connected with the capacitive liquid level sensor and the temperature sensor.
3. The intelligent liquid nitrogen tank cover according to claim 2, wherein, The capacitive liquid level sensor extends along the axial direction of the tank cover body, and the temperature sensor is fixed on the capacitive liquid level sensor.
4. The intelligent liquid nitrogen tank cover according to claim 1, wherein, The temperature sensor is configured to calibrate the measurement parameters of the capacitive liquid level sensor.
5. The intelligent liquid nitrogen tank cover according to claim 1, wherein, The intelligent liquid nitrogen tank cover further comprises a soft chain; one end of the soft chain is used for detachably connecting with the liquid nitrogen tank, and the other end is detachably and lockingly connected with the tank cover body.
6. The intelligent liquid nitrogen tank cap of claim 1, wherein, The tank cover body comprises an electromagnetic lock, and the soft chain comprises a lock catch matched with the electromagnetic lock, and the lock catch is used for locking with the electromagnetic lock.
7. The smart liquid nitrogen tank cap of claim 6, wherein, The tank cover body further comprises a mechanical lock used for unlocking the electromagnetic lock and the lock catch.
8. The smart liquid nitrogen tank cap of claim 7, wherein, The soft chain comprises a clamping part; the clamping part comprises at least two clamping blocks used for clamping the handle of the liquid nitrogen tank.
9. The intelligent liquid nitrogen tank cap of claim 6, wherein, The soft chain comprises a folding arm, a clamping part and a lock catch; the two ends of the folding arm along the axial direction of the folding arm are respectively connected with the clamping part and the lock catch; the folding arm comprises two arm segments oppositely arranged along the axial direction of the folding arm, and the axial opposite positions of the two arm segments are adjustably arranged to adjust the relative distance between the clamping part and the lock catch.
10. The intelligent liquid nitrogen tank cap of claim 6, wherein,