Liquid nitrogen container cover and liquid nitrogen container

Abstract

The utility model discloses a liquid nitrogen container cover and a liquid nitrogen container, the liquid nitrogen container cover comprises a cover body, a liquid preparation tank, a locking piece, a liquid level meter and a controller, the top of the cover body is provided with an insertion opening, and an electric control valve is arranged in the insertion opening; a liquid inlet and outlet pipe is arranged at the bottom end of the liquid preparation tank, a valve is arranged on the liquid inlet and outlet pipe, and the liquid inlet and outlet pipe is inserted into the insertion opening; the locking piece is arranged between the cover body and the liquid preparation tank and is used for locking and sealing; the liquid level meter is arranged on the cover body; and the controller is electrically connected with the electric control valve and the liquid level meter. The liquid preparation tank, the locking piece, the liquid level meter and the controller are arranged on the cover body, liquid level detection and automatic liquid supplementing of the liquid nitrogen container are integrated on the cover body, and the liquid preparation tank can be detached and replaced, so that a liquid level monitoring element is prevented from being arranged in the tank body, and automatic liquid supplementing can be performed without pipeline laying.

Description

Technical Field

[0001] The utility model relates to the technical field of cryopreservation equipment, in particular to a lid of a liquid nitrogen container and a liquid nitrogen container. Background Art

[0002] Liquid nitrogen tanks can generally be divided into two types: liquid nitrogen storage tanks and liquid nitrogen transportation tanks. The storage tank is mainly used for static storage of liquid nitrogen indoors. Its structure is simple and its function is single. It requires manual pouring of liquid nitrogen for injection to store refrigerated samples at low temperature inside. Due to the volatility of liquid nitrogen, it is necessary to frequently replenish liquid nitrogen. However, it is difficult for the human eye to effectively judge the height of the liquid nitrogen level in the liquid nitrogen tank. Therefore, there are liquid nitrogen tanks with liquid level detection. For example, Chinese Patent No. 202123433101.2 discloses a liquid nitrogen tank, including a tank body; an exhaust pipe, with the inlet end arranged inside the tank body and the outlet end arranged outside the tank body; a temperature monitoring element arranged in the tank body; and a liquid level monitoring element arranged in the tank body.

[0003] For the above-mentioned existing technologies, there are still the following problems: When replenishing the liquid nitrogen tank with a liquid replenishing pipeline, additional corresponding pipelines need to be laid. Limited by the site, the versatility is not high. Therefore, how to perform automatic liquid replenishment without pipeline laying is a technical problem to be solved. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the above technical deficiencies, and propose a lid of a liquid nitrogen container and a liquid nitrogen container to solve the technical problem of how to avoid arranging the liquid level monitoring element inside the tank and perform automatic liquid replenishment without pipeline laying in the existing technology.

[0005] To achieve the above technical purpose, the utility model adopts the following technical solutions:

[0006] In the first aspect, the utility model provides a lid of a liquid nitrogen container, including:

[0007] A cover body, with a socket opened at the top, and an electric control valve is arranged inside the socket;

[0008] A liquid preparation tank, with an inlet and outlet pipe arranged at the bottom end, a valve is arranged on the inlet and outlet pipe, and the inlet and outlet pipe is inserted into the socket;

[0009] A locking member, which is arranged between the cover body and the liquid preparation tank for locking and sealing;

[0010] A liquid level gauge, which is arranged on the cover body; and

[0011] A controller, which is electrically connected to both the electric control valve and the liquid level gauge, is used to receive the liquid level signal of the liquid level gauge, and control the opening and closing of the electric control valve according to the liquid level signal.

[0012] In some embodiments, a diversion hole extending through to the bottom of the cover body is provided at the bottom of the socket.

[0013] In some embodiments, the socket is circular in shape.

[0014] In some embodiments, the locking member includes a seat body, a connecting sleeve, a limiting ring and a sealing ring. The seat body is concentrically arranged on the top of the cover body with the socket. The connecting sleeve is sleeved on the outer side of the liquid inlet and outlet pipe. The limiting ring is arranged on the outer side of the liquid inlet and outlet pipe. The sealing ring is arranged at the bottom of the limiting ring. The sealing ring abuts against the top of the seat body. The connecting sleeve is threadedly connected with the seat body. The limiting ring abuts against the inner top wall of the connecting sleeve.

[0015] In some embodiments, a sealing layer is provided on the inner side of the socket.

[0016] In some embodiments, a pressure gauge is provided on the liquid inlet and outlet pipe for detecting the pressure value in the liquid preparation tank.

[0017] In some embodiments, a buzzer is further provided on the cover body, and the buzzer is electrically connected to the controller.

[0018] In some embodiments, a diversion pipe extending downward is provided at the bottom of the diversion hole.

[0019] In some embodiments, the liquid level gauge is fixed to the cover body by bolts.

[0020] In a second aspect, the present utility model further provides a liquid nitrogen container, including the lid of the liquid nitrogen container as described in any one of the above.

[0021] Compared with the prior art, for the lid of the liquid nitrogen container provided by the present utility model, by arranging a liquid preparation tank, a locking member, a liquid level gauge and a controller on the cover body, the liquid level detection and automatic liquid replenishment of the liquid nitrogen container are integrated on the cover body. Moreover, the liquid preparation tank is detachable and replaceable, which not only avoids the liquid level monitoring element being arranged in the tank body, but also can perform automatic liquid replenishment without laying pipelines, improving the safety and controllability of liquid replenishment, avoiding volatilization and danger caused by manual pouring liquid replenishment, facilitating the control of the liquid level height of liquid replenishment, and through the automatic liquid replenishment of the liquid preparation tank, the stable sample storage duration of the liquid nitrogen container can be extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a three-dimensional view of the lid of the liquid nitrogen container provided by an embodiment of the present utility model;

[0023] Figure 2 is an exploded three-dimensional view of the lid of the liquid nitrogen container provided by an embodiment of the present utility model;

[0024] Figure 3 is the front sectional view of the lid of the liquid nitrogen container provided by the embodiment of the present utility model;

[0025] Figure 4 is the three-dimensional schematic diagram of the liquid nitrogen container provided by the embodiment of the present utility model.

[0026] Explanation of the reference numerals in the drawings:

[0027] 1. Lid body; 101. Socket; 1011. Diversion hole; 1012. Sealing layer; 1013. Diversion pipe; 102. Electric control valve; 103. Buzzer;

[0028] 2. Reserve liquid tank; 201. Liquid inlet and outlet pipe; 202. Valve; 203. Pressure gauge;

[0029] 3. Locking member; 31. Base body; 32. Connecting sleeve; 33. Limiting ring; 34. Sealing ring;

[0030] 4. Liquid level gauge; 401. Bolt;

[0031] 5. Controller. Specific embodiments

[0032] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0033] In order to solve the technical problem of how to avoid arranging the liquid level monitoring element in the tank body and automatically replenish the liquid without laying pipelines, the present utility model provides a lid of a liquid nitrogen container and a liquid nitrogen container, which can achieve how to avoid arranging the liquid level monitoring element in the tank body and automatically replenish the liquid without laying pipelines.

[0034] It should be noted that the lid of the liquid nitrogen container described in the present utility model is used for but not limited to liquid nitrogen containers, etc. For the convenience of description, in the present utility model, only the lid of the liquid nitrogen container applied to the liquid nitrogen container is taken as an example for description, and the principle of the lid of the liquid nitrogen container applied to other types of equipment is substantially the same as that applied to the liquid nitrogen container, and will not be elaborated one by one here.

[0035] In the first aspect, please refer to Figure 1 and Figure 2 , Figure 1 and Figure 2Respectively are the three-dimensional structure diagram and three-dimensional explosion diagram of the lid of the liquid nitrogen container in an embodiment of the present utility model. The lid of the liquid nitrogen container includes a lid body 1, a liquid preparation tank 2, a locking member 3, a liquid level gauge 4, and a controller 5. A socket 101 is opened at the top of the lid body 1, and the socket 101 communicates to the lower part of the lid body 1. An electric control valve 102 is arranged in the socket 101 to control the on-off of the socket 101. When the electric control valve 102 is opened, the socket 101 penetrates through the top and bottom of the lid body 1. When the electric control valve 102 is closed, the socket 101 is closed; a liquid inlet and outlet pipe 201 is arranged at the bottom end of the liquid preparation tank 2, and a valve 202 is arranged on the liquid inlet and outlet pipe 201. When the valve 202 is opened, the liquid inlet and outlet pipe 201 communicates with the inside of the liquid preparation tank 2. Among them, the liquid inlet and outlet pipe 201 is inserted into the socket 101. At this time, the entire liquid preparation tank 2 is in an inverted state, and the liquid inlet and outlet pipe 201 is butted to the socket 101. When the valve 202 is opened, the liquid nitrogen in the liquid preparation tank 2 is communicated with the socket 101. According to the opening and closing of the electric control valve 102, the replenishment of the liquid preparation tank 2 can be controlled to start and stop; the locking member 3 is arranged between the lid body 1 and the liquid preparation tank 2 for locking and sealing. When the liquid inlet and outlet pipe 201 of the liquid preparation tank 2 is inserted into the socket 101, the connection is tightened and sealed by the locking member 3; the liquid level gauge 4 is arranged on the lid body 1 and penetrates through the lid body 1 from top to bottom for detecting the liquid level height of the liquid nitrogen. Moreover, the liquid level gauge 4 is installed on the lid body 1 and can be detached from the liquid nitrogen container together with the removal of the lid body 1, which is convenient for maintenance and repair, and avoids the detection element being located inside the tank body of the liquid nitrogen container; the controller 5 is electrically connected to both the electric control valve 102 and the liquid level gauge 4, and is used to receive the liquid level signal of the liquid level gauge 4 and control the opening and closing of the electric control valve 102 according to the liquid level signal. By setting a replenishment liquid level value and a stop replenishment liquid level value, when the liquid level gauge 4 detects that the liquid nitrogen value in the liquid nitrogen container drops to this threshold value, it feeds back to the controller 5, and the controller 5 controls the electric control valve 102 to open, and the liquid preparation tank 2 replenishes the liquid.

[0036] In this embodiment, during the use of the liquid preparation tank 2, liquid nitrogen is injected at the liquid nitrogen supply place first. After filling with liquid nitrogen, it can be used as a small transfer and storage device, which can be used both for preparing liquid for the liquid nitrogen container and as an injection device for preventing liquid nitrogen volatilization.

[0037] It can be understood that according to the above principle, a liquid replenishment level value and a stop liquid replenishment level value are set for the prepared liquid. When the liquid level gauge 4 detects that the liquid nitrogen value in the liquid nitrogen container drops to this threshold value, the controller 5 controls the electric control valve 102 to open, and the prepared liquid tank 2 replenishes the liquid. At this time, the prepared liquid tank 2 is used for preparing the liquid nitrogen for the liquid nitrogen container; when liquid nitrogen is first injected into the liquid nitrogen container, it still follows the set liquid replenishment level value and stop liquid replenishment level value. Since there is no solution in it, the liquid level value must be below the liquid replenishment level value, then the electric control valve 102 for liquid replenishment is opened to inject liquid nitrogen. Since the prepared liquid tank 2 is connected to the cover body 1 and is internally connected and not an open way of pouring liquid nitrogen, the volatilization during liquid nitrogen injection can be greatly reduced. When filled to the corresponding liquid level height, the electric control valve 102 is closed, and the liquid nitrogen container is sealed again, and then the prepared liquid tank 2 can be replaced.

[0038] In one embodiment, please refer to Figure 3 , a diversion hole 1011 extending from the bottom of the socket 101 through to the bottom of the cover body 1 is provided. Among them, the aperture of the diversion hole 1011 is smaller than the inner diameter of the socket 101 to avoid weakening the heat preservation performance due to too large an opening. Moreover, the diversion hole 1011 is narrowed to avoid too fast liquid replenishment, resulting in a decrease in liquid level control accuracy.

[0039] It can be understood that the diversion hole 1011 is a part of the socket 101. The socket 101 is the part close to the top of the cover body 1, mainly used for inserting the liquid inlet and outlet pipe 201, while the diversion hole 1011 is the lower half of the socket 101, mainly used for penetrating to the bottom of the cover body 1 to conduct and introduce liquid nitrogen into the tank body of the liquid nitrogen container.

[0040] Furthermore, the socket 101 is circular in shape, which is convenient for insertion.

[0041] It can be understood that the socket 101 can also be square, polygonal or other shapes, which are not limited herein.

[0042] In one embodiment, please refer to Figure 2 and Figure 3 , in order to lock the cover body 1 and the prepared liquid tank 2, the locking member 3 includes a seat body 31, a connecting sleeve 32, a limiting ring 33 and a sealing ring 34. The seat body 31 is concentrically arranged on the top of the cover body 1 with the socket 101. The seat body 31 is circular, and an external thread is provided on its outer side. The connecting sleeve 32 is sleeved on the outer side of the liquid inlet and outlet pipe 201 and can slide along the liquid inlet and outlet pipe 201, and an internal thread is provided therein. The limiting ring 33 is arranged on the outer side of the liquid inlet and outlet pipe 201 and is located below the connecting sleeve 32. The sealing ring 34 is arranged at the bottom of the limiting ring 33. During installation, the sealing ring 34 abuts against the top of the seat body 31, the connecting sleeve 32 is threadedly connected to the seat body 31, and the limiting ring 33 abuts against the inner top wall of the connecting sleeve 32.

[0043] It can be understood that the liquid inlet and outlet pipe 201 is first inserted into the socket 101, the limiting ring 33 presses the sealing ring 34 against the top of the seat body 31, and then the connecting sleeve 32 is rotated and connected to the seat body 31, and its inner top wall presses down on the limiting ring 33 for locking and sealing.

[0044] Furthermore, in order to improve the sealing performance, a sealing layer 1012 is provided on the inner side of the socket 101.

[0045] In one embodiment, please refer to Figure 2 , a pressure gauge 203 is provided on the liquid inlet and outlet pipe 201 for detecting the pressure value in the liquid storage tank 2, which can facilitate observing the remaining liquid nitrogen in the liquid storage tank 2 so as to replace the liquid storage tank 2.

[0046] In one embodiment, please refer to Figure 2 , a buzzer 103 is further provided on the cover body 1, and the buzzer 103 is electrically connected to the controller 5. In order to prevent forgetting to replace the liquid storage tank 2, it has a certain reminder function. When the liquid level gauge 4 detects that the liquid nitrogen value in the liquid nitrogen container drops to the threshold value, the controller 5 controls the electric control valve 102 to open, and the liquid storage tank 2 is replenished with liquid. If the liquid level gauge 4 fails to detect the liquid level change all the time, the controller 5 controls the buzzer 103 to start, reminding that the liquid storage tank 2 is empty, and closes the electric control valve 102.

[0047] In one embodiment, please refer to Figure 3 , a diversion pipe 1013 extending downward is provided at the bottom of the diversion hole 1011, and the diversion pipe 1013 is used to control the height difference between the bottom end of the liquid injection and the highest liquid level of the injected liquid nitrogen.

[0048] In one embodiment, please refer to Figure 2 , the liquid level gauge 4 is fixed to the cover body 1 through bolts 401, and the liquid level gauge 4 can be disassembled by removing the bolts 401.

[0049] It can be understood that the fixation of the bolts 401 is only one installation method for the detachable liquid level gauge 4. The liquid level gauge 4 can be adaptively installed in other ways according to its model and category, which is not limited herein.

[0050] For a better understanding of the present invention, the technical solutions of the present invention will be described in detail below in conjunction with Figures 1 to 3 Regarding the installation of the liquid storage tank 2, first invert it as Figure 1In the shown position, the liquid inlet and outlet pipe 201 is at its bottom end. Insert the liquid inlet and outlet pipe 201 into the socket 101, then rotate the connecting sleeve 32 to be threadedly connected with the seat body 31, and press the limiting ring 33 against the top of the seat body 31 to complete the connection. For disassembly and replacement of the liquid storage tank 2, just operate in the reverse according to the above principle. For automatic liquid replenishment, first manually open the valve 202 to connect the liquid storage tank 2, the liquid inlet and outlet pipe 201 with the socket 101. Then, according to the set liquid replenishment liquid level value and the stop liquid replenishment liquid level value, when the liquid level gauge 4 detects that the liquid nitrogen value in the liquid nitrogen container drops to the liquid replenishment liquid level value, the controller 5 controls the electric control valve 102 to open, and the liquid storage tank 2 is connected to the socket 101 to replenish the inside of the liquid nitrogen container through the diversion hole 1011 and the diversion pipe 1013. When the replenishment reaches the stop liquid replenishment liquid level value, the electric control valve 102 is controlled to close.

[0051] It should be noted that in the above embodiments, for the power supply of the electrical components, battery power supply or external power supply can be used. The power supply methods are all prior arts and are not limited herein.

[0052] In a second aspect, please refer to Figure 4 , the present utility model also provides a liquid nitrogen container, including the lid of the liquid nitrogen container in any one of the above embodiments. The lid of the liquid nitrogen container is inserted into the mouth of the liquid nitrogen container. Among them, the liquid level gauge 4 detects the liquid nitrogen level stored inside the liquid nitrogen container. When both the electric control valve 102 and the valve 202 are open, the liquid storage tank 2 replenishes liquid nitrogen into the liquid nitrogen container.

[0053] The specific implementation manners of the present utility model described above do not constitute a limitation to the protection scope of the present utility model. Any other corresponding changes and deformations made according to the technical concept of the present utility model should be included in the protection scope of the claims of the present utility model.

Claims

1. A cover for a liquid nitrogen container, characterized in that: include: The cover body has a socket on the top, and an electric control valve is arranged in the socket; A liquid reserve tank, the bottom of which is provided with a liquid inlet and outlet pipe, the liquid inlet and outlet pipe is provided with a valve, and the liquid inlet and outlet pipe is inserted into the socket; A locking member, which is arranged between the cover body and the reserve liquid tank and is used for locking and sealing; A liquid level gauge, which is arranged on the cover body; as well as A controller is electrically connected to the electric control valve and the liquid level meter, and is used to receive a liquid level signal from the liquid level meter and control the opening and closing of the electric control valve according to the liquid level signal.

2. The cover of the liquid nitrogen container according to claim 1, characterized in that: A guide hole extending from the bottom of the socket and penetrating to the bottom of the cover body is provided.

3. The cover of the liquid nitrogen container according to claim 2, characterized in that: The socket is circular in shape.

4. The cover of the liquid nitrogen container according to claim 3, characterized in that: The locking component includes a seat body, a connecting sleeve, a limiting ring and a sealing ring. The seat body is arranged concentrically with the socket on the top of the cover body, the connecting sleeve is sleeved on the outside of the inlet and outlet pipes, the limiting ring is arranged on the outside of the inlet and outlet pipes, the sealing ring is arranged at the bottom of the limiting ring, the sealing ring abuts against the top of the seat body, the connecting sleeve is threadedly connected to the seat body, and the limiting ring abuts against the inner top wall of the connecting sleeve.

5. The cover of the liquid nitrogen container according to claim 4, characterized in that: A sealing layer is arranged on the inner side of the socket.

6. The cover of the liquid nitrogen container according to claim 5, characterized in that: The inlet and outlet liquid pipes are provided with pressure gauges for detecting the pressure value in the reserve liquid tank.

7. The cover of the liquid nitrogen container according to claim 6, characterized in that: The cover body is also provided with a buzzer, and the buzzer is electrically connected to the controller.

8. The cover of the liquid nitrogen container according to claim 7, characterized in that: A flow guide pipe extending downward is arranged at the bottom of the flow guide hole.

9. The cover of the liquid nitrogen container according to claim 8, characterized in that: The liquid level meter is fixed to the cover body by bolts.

10. A liquid nitrogen container, characterized in that: A cover comprising a liquid nitrogen container according to any one of claims 1 to 9.

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