Liquid nitrogen temperature detection device

Abstract

The utility model discloses a liquid nitrogen temperature detection device, which comprises a liquid nitrogen tank, a mounting pipe fixed at the top of the liquid nitrogen tank, and a thermometer detachably mounted on the mounting pipe, the top of the liquid nitrogen tank is fixedly connected with an insertion sleeve, an insertion rod is movably inserted in the insertion sleeve, the lower end of the insertion rod is fixedly connected with a plurality of positioning strips, and the positioning strips are fixedly connected with the liquid nitrogen tank. An opening is formed in the positioning strip, a stop block is fixedly connected to the inner wall of the opening, a movable strip is rotationally arranged between the inner walls of the opening, and the stop block is located below the movable strip. According to the utility model, the thermometer is arranged to monitor the temperature of liquid nitrogen in the liquid nitrogen tank, the holding rod is pulled upwards to drive the insertion rod to move upwards, the insertion rod drives the positioning strip at the bottom of the insertion rod to move upwards, and the movable strip in the opening is kept in the opening under the pressure of the liquid, so that the liquid nitrogen is pushed upwards; position exchange of upper and lower liquid nitrogen is promoted, and data obtained when the thermometer detects the temperature of the liquid nitrogen is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid nitrogen temperature detection, and particularly relates to a liquid nitrogen temperature detection device. Background Technique

[0002] Liquid nitrogen is the liquid form of nitrogen at extremely low temperatures. Its boiling point is -196°C (-321°F), so under normal temperature and pressure, nitrogen exists in gaseous form. Liquid nitrogen is widely used in cooling and cryogenic experiments, such as material testing, medical applications (e.g., cryotherapy), and freezing processes in the food industry. It is also commonly used in scientific research and industrial applications because it can rapidly cool down and provide an extremely low temperature environment. Liquid nitrogen is stored in special containers to maintain its low temperature state; liquid nitrogen is usually stored inside specially designed containers. To monitor the temperature of liquid nitrogen, a thermometer is usually installed inside the container to monitor the temperature of liquid nitrogen.

[0003] A liquid nitrogen temperature detection system disclosed in Patent Application No. CN202220352396.6 detects the temperature of liquid nitrogen in a storage tank through a temperature detection component. The temperature detection component can move vertically in the tank to improve the detection range. However, the temperature detection component is completely immersed in the liquid nitrogen tank, which will cause damage and make it impossible to take readings. Therefore, it is urgently needed to be changed. Content of the Utility Model

[0004] (I) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the utility model provides a liquid nitrogen temperature detection device, which solves the problems raised in the above background technique.

[0006] (II) Technical Solutions

[0007] To achieve the above objectives, the utility model is realized through the following technical solutions: A liquid nitrogen temperature detection device includes a liquid nitrogen tank, an installation pipe fixed on the top of the liquid nitrogen tank, and a thermometer detachably installed on the installation pipe. A socket is fixedly connected to the top of the liquid nitrogen tank. An insertion rod is movably inserted inside the socket. The lower end of the insertion rod is fixedly connected with a plurality of positioning strips. An opening is formed inside the positioning strip. A stop block is fixedly connected to the inner wall of the opening. A movable strip is rotatably arranged between the inner walls of the opening. The stop block is located below the movable strip. By driving the insertion rod to move vertically back and forth, the movable strip is used to stir the liquid nitrogen.

[0008] Preferably, the upper end of the insertion rod is fixedly connected with a grip rod. The grip rod is perpendicular to the insertion rod and is located above the socket.

[0009] Preferably, a threaded hole is provided on the circumferential side wall at the top end of the insertion rod, a positioning ring is fixedly connected to the top end of the liquid nitrogen tank, a bolt is movably inserted into the positioning ring, and the threaded end of the bolt is threadedly inserted into the threaded hole.

[0010] Preferably, a liquid inlet pipe is fixedly connected to the top of the liquid nitrogen tank, and a sealing plug is inserted at the pipe orifice of the liquid inlet pipe.

[0011] Preferably, two symmetrically distributed handles are fixedly connected to the outer circumferential side wall of the liquid nitrogen tank.

[0012] Preferably, the positioning strip is horizontally arranged, and the positioning strips are circumferentially and equidistantly distributed at the lower end of the insertion rod.

[0013] (III) Beneficial effects

[0014] The present utility model provides a liquid nitrogen temperature detection device, which has the following beneficial effects:

[0015] 1. In the present utility model, the temperature of the liquid nitrogen inside the liquid nitrogen tank is monitored by setting a thermometer. And by pulling the grip rod upward, the insertion rod is driven to move upward, and the insertion rod drives the positioning strip at its bottom to move upward. The movable strip inside the opening is under the liquid pressure and remains in the opening, pushing the liquid nitrogen upward to promote the position exchange of the upper and lower liquid nitrogen; when the positioning strip moves downward, the movable strip rotates, so that the liquid nitrogen can pass through the opening, preventing the just-lifted liquid nitrogen from being pushed downward again, thus better realizing the up-and-down position exchange of the liquid nitrogen. At this time, the data obtained when the thermometer detects the liquid nitrogen temperature is more accurate.

[0016] 2. In the present utility model, by passing the bolt through the ring opening of the positioning ring and threadedly inserting the end of the bolt into the threaded hole, the purpose of locking the insertion rod is achieved, so that the insertion rod remains in the current position, and then other operations can be carried out. For example, at this time, the sealing plug can be removed to pour out the liquid nitrogen inside the liquid nitrogen tank. Description of the drawings

[0017] Figure 1 is the front view three-dimensional structure diagram of a liquid nitrogen temperature detection device proposed by the present utility model;

[0018] Figure 2 is the sectional three-dimensional structure diagram of a liquid nitrogen temperature detection device proposed by the present utility model;

[0019] Figure 3 is Figure 1 the enlarged structure diagram at A of

[0020] Figure 4 is Figure 2 the enlarged structure diagram at B of

[0021] Figure 5This is a partial structural diagram of a liquid nitrogen temperature detection device proposed by the present utility model.

[0022] In the figure: 1, liquid nitrogen tank; 2, thermometer; 3, installation pipe; 4, socket; 5, plug rod; 501, screw hole; 6, grip rod; 7, positioning strip; 701, opening; 8, movable strip; 9, stop block; 10, positioning ring; 11, bolt; 12, liquid inlet pipe; 13, sealing plug; 14, handle. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0024] Please refer to Figures 1 to 5 , the present utility model provides a technical solution: a liquid nitrogen temperature detection device, including a liquid nitrogen tank 1, an installation pipe 3 fixed to the top of the liquid nitrogen tank 1, and a thermometer 2 detachably installed on the installation pipe 3. The thermometer 2 is usually connected to the installation pipe 3 by a threaded connection, and the probe of the thermometer 2 is located inside the liquid nitrogen tank 1 and contacts the liquid nitrogen to achieve detection. A socket 4 is fixedly connected to the top of the liquid nitrogen tank 1, and a plug rod 5 is movably inserted into the socket 4. A plurality of positioning strips 7 are fixedly connected to the lower end of the plug rod 5. The positioning strips 7 are horizontally arranged, and the positioning strips 7 are circumferentially and equidistantly distributed at the lower end of the plug rod 5. An opening 701 is formed inside the positioning strip 7, a stop block 9 is fixedly connected to the inner wall of the opening 701, and a movable strip 8 is rotatably arranged between the inner walls of the opening 701. The stop block 9 is located below the movable strip 8. By driving the plug rod 5 to move vertically up and down, the movable strip 8 can stir the liquid nitrogen.

[0025] The upper end of the plug rod 5 is fixedly connected with a grip rod 6. The grip rod 6 is perpendicular to the plug rod 5, and the grip rod 6 is located above the socket 4, so as to prevent the plug rod 5 from completely entering the liquid nitrogen tank 1.

[0026] By setting the thermometer 2 to monitor the temperature of the liquid nitrogen inside the liquid nitrogen tank 1, and by pulling the grip rod 6 upward, driving the plug rod 5 to move upward, the plug rod 5 drives the positioning strip 7 at its bottom to move upward. The movable strip 8 inside the opening 701 is under the liquid pressure and remains in the opening 701, pushing the liquid nitrogen upward to promote the position exchange of the upper and lower liquid nitrogen; when the positioning strip 7 moves downward, the movable strip 8 rotates, so that the liquid nitrogen can pass through the opening 701, avoiding pushing the just-lifted liquid nitrogen back to the lower part again, thereby better realizing the up and down position exchange of the liquid nitrogen. At this time, the data obtained by the thermometer 2 when detecting the liquid nitrogen temperature is more accurate, and more comprehensive temperature data can be obtained.

[0027] A screw hole 501 is formed in the circumferential side wall at the top end of the insertion rod 5. A positioning ring 10 is fixedly connected to the top end of the liquid nitrogen tank 1. A bolt 11 is movably inserted into the positioning ring 10, and the threaded end of the bolt 11 is threadedly inserted into the screw hole 501.

[0028] By passing the bolt 11 through the ring opening of the positioning ring 10 and threadedly inserting the end of the bolt 11 into the screw hole 501, the purpose of locking the insertion rod 5 is achieved, so that the insertion rod 5 remains in the current position.

[0029] A liquid inlet pipe 12 is fixedly connected to the top of the liquid nitrogen tank 1. A sealing plug 13 is inserted at the pipe orifice of the liquid inlet pipe 12. The sealing plug 13 can also be connected to the liquid inlet pipe 12 by means of threaded connection.

[0030] The sealing plug 13 can be removed to pour the liquid nitrogen inside the liquid nitrogen tank 1 or to perform an operation of adding liquid nitrogen to the inside of the liquid nitrogen tank 1.

[0031] Two symmetrically distributed handles 14 are fixedly connected to the outer circumferential side wall of the liquid nitrogen tank 1. By providing the handles 14, it is convenient to carry the liquid nitrogen tank 1.

[0032] The above shows and describes the basic principle, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present utility model and are not used to limit the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A liquid nitrogen temperature detection device, characterized in that: It includes a liquid nitrogen tank (1), an installation pipe (3) fixed to the top of the liquid nitrogen tank (1), and a thermometer (2) detachably installed on the installation pipe (3). A socket (4) is fixedly connected to the top of the liquid nitrogen tank (1). An insertion rod (5) is movably inserted into the socket (4). A plurality of positioning strips (7) are fixedly connected to the lower end of the insertion rod (5). An opening (701) is formed in the positioning strip (7). A stop block (9) is fixedly connected to the inner wall of the opening (701). A movable strip (8) is rotatably arranged between the inner walls of the opening (701). The stop block (9) is located below the movable strip (8). By driving the insertion rod (5) to move vertically back and forth, the movable strip (8) stirs the liquid nitrogen.

2. The liquid nitrogen temperature detection device according to claim 1, characterized in that: A grip rod (6) is fixedly connected to the upper end of the insertion rod (5). The grip rod (6) is perpendicular to the insertion rod (5). The grip rod (6) is located above the socket (4).

3. The liquid nitrogen temperature detection device according to claim 2, characterized in that: A threaded hole (501) is formed in the circumferential side wall of the top end of the insertion rod (5). A positioning ring (10) is fixedly connected to the top end of the liquid nitrogen tank (1). A bolt (11) is movably inserted into the positioning ring (10). The threaded end of the bolt (11) is threadedly inserted into the threaded hole (501).

4. The liquid nitrogen temperature detection device according to claim 1, characterized in that: A liquid inlet pipe (12) is fixedly connected to the top of the liquid nitrogen tank (1). A sealing plug (13) is inserted into the pipe orifice of the liquid inlet pipe (12).

5. The liquid nitrogen temperature detection device according to claim 1, characterized in that: Two symmetrically distributed handles (14) are fixedly connected to the outer circumferential side wall of the liquid nitrogen tank (1).

6. The liquid nitrogen temperature detection device according to claim 1, wherein: The positioning strip (7) is horizontally arranged. The positioning strips (7) are circumferentially and equidistantly distributed at the lower end of the insertion rod (5).

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