Liquid nitrogen filling device convenient to adjust

Abstract

The utility model discloses a liquid nitrogen filling device convenient to adjust, and relates to the technical field of liquid nitrogen filling, the liquid nitrogen filling device comprises a placing table, a liquid nitrogen box is arranged on the upper surface of the placing table, and a filling assembly is arranged on one side of the upper surface of the liquid nitrogen box; the filling assembly comprises a liquid nitrogen conveying pump, the liquid nitrogen conveying pump is fixedly connected with one side of the upper surface of the liquid nitrogen box, the output end of the liquid nitrogen conveying pump is fixedly connected with a liquid conveying pipe, the lower end of the liquid conveying pipe is fixedly connected with a liquid conveying sealing head, a vacuum pump is arranged on one side of the liquid nitrogen conveying pump, and the input end of the vacuum pump is fixedly connected with an air suction pipe. A detection assembly is arranged at the lower end of the exhaust pipe. Through the arrangement of the filling assembly, the adjusting effect of the device is effectively improved, so that the filling safety of the device is improved, and the using effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid nitrogen filling technology field, concretely is a liquid nitrogen filling device convenient to adjust. BACKGROUND

[0002] In stem cell storage, liquid nitrogen storage tank is the most effective long-term preservation method, and the temperature can reach -196 DEG C. The liquid nitrogen storage tank has high heat insulation performance and stable temperature control system, and can ensure that the stem cells remain active at extremely low temperature. At present, stem cell storage mainly uses liquid phase and gas phase two types of liquid nitrogen tank, wherein the liquid phase liquid nitrogen tank has advantages in preventing cross contamination between samples, reducing the risk of sample pipe burst and loss.

[0003] But the current liquid nitrogen filling is one-way pipeline, and does not have the function of filling detection, which leads to the situation of filling sputtering if the internal gas is not excluded before filling, and the situation occurs when the filling rate is too fast, which leads to the sputtering situation when filling is about to be completed, causing liquid nitrogen waste or sputtering frostbite of the staff.

[0004] Based on this, a liquid nitrogen filling device convenient to adjust is provided, which can eliminate the disadvantages of the existing device. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a liquid nitrogen filling device convenient to adjust to solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A liquid nitrogen filling device convenient to adjust, comprising a placing table, the upper surface of the placing table is provided with a liquid nitrogen tank, and the upper surface of the liquid nitrogen tank is provided with a filling assembly on one side;

[0008] The filling assembly comprises a liquid nitrogen delivery pump, the liquid nitrogen delivery pump is fixedly connected with the upper surface of the liquid nitrogen tank on one side, the output end of the liquid nitrogen delivery pump is fixedly connected with a liquid delivery pipe, the input end of the liquid nitrogen delivery pump is fixedly connected with a delivery pipe, the lower end of the delivery pipe penetrates through the bottom of the liquid nitrogen tank, the lower end of the liquid delivery pipe is fixedly connected with a liquid delivery sealing head, the liquid nitrogen delivery pump is provided with a vacuum pump on one side, the input end of the vacuum pump is fixedly connected with a gas extraction pipe, and the lower end of the gas extraction pipe is provided with a detection assembly.

[0009] On the basis of the above technical scheme, the utility model also provides the following optional technical scheme:

[0010] In an alternative: the sealing assembly comprises sealing blocks, the sealing blocks are provided with two and are respectively slidingly arranged on both sides of the infusion sealing head, a plurality of springs are fixedly connected to the sealing blocks adjacent to the infusion sealing head, one end of the infusion sealing head is slidingly connected with a limiting ring, and the limiting ring is fixedly connected with a push plate at an end away from the infusion sealing head.

[0011] In an alternative: the detection assembly comprises an air extraction sealing head, the air extraction sealing head is fixedly connected with an electromagnetic valve at the middle part, and the air extraction sealing head is provided with a gas pressure sensor at the lower end.

[0012] In an alternative: the vacuum pump output end is fixedly connected with an air outlet pipe and is connected with the gas collecting mechanism through the air outlet pipe.

[0013] In an alternative: the filling assembly is provided with a protection assembly on one side.

[0014] In an alternative: the protection assembly comprises a protection box, the protection box is fixedly connected with the upper surface of the liquid nitrogen tank, a side door is hingedly connected to the upper surface of the protection box through a hinge, and two limiting grooves are formed in the side of the protection box adjacent to the filling assembly.

[0015] In an alternative: the liquid nitrogen tank is provided with a liquid adding port at the upper end.

[0016] In an alternative: the placing table is provided with moving wheels at the lower end.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0018] The filling assembly is arranged, the air in the storage tank is first extracted before filling, the gas residual condition in the interior can be monitored in real time through the gas pressure sensor to prevent the residual gas from causing the sputtering of liquid nitrogen filling, the filling condition of liquid nitrogen is monitored through the infusion sealing head and the internal flow meter, and the sealing assembly can prevent the infusion sealing head from being lifted due to the increase of the gas pressure in the liquid nitrogen, thereby further improving the safety effect of liquid nitrogen filling, effectively improving the adjusting effect of the device, thereby improving the filling safety of the device and the use effect. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a whole structure schematic view of the utility model.

[0020] Figure 2 It is a whole structure side surface schematic view of the utility model.

[0021] Figure 3 It is a filling assembly structure schematic view of the utility model.

[0022] Figure 4 It is a protective component structure schematic view of the utility model.

[0023] Figure 5 It is a sealing component structure schematic view of the utility model.

[0024] Mark annotation: 1, put the table; 2, moving wheel; 3, liquid nitrogen tank; 4, liquid inlet; 5, liquid nitrogen delivery pump; 6, vacuum pump; 7, protection box; 8, side door; 9, infusion tube; 10, suction tube; 11, infusion sealing head; 12, suction sealing head; 13, air pressure sensor; 14, electromagnetic valve; 15, gas outlet pipe; 16, limit groove; 17, hinge; 18, spring; 19, sealing block; 20, limit ring; 21, push plate. DETAILED DESCRIPTION

[0025] In order to make the utility model purposes, technical scheme and advantages more clearly, following combining with the drawing and example, the utility model is further detailed.

[0026] In one embodiment, as shown in Figures 1-4 A kind of liquid nitrogen filling device facilitating adjustment, including placement table 1, the upper surface of the placement table 1 is provided with liquid nitrogen tank 3, the upper surface of the liquid nitrogen tank 3 is provided with filling assembly on one side;

[0027] The filling assembly includes liquid nitrogen delivery pump 5, the upper surface of the liquid nitrogen tank 3 is fixedly connected with liquid nitrogen delivery pump 5 on one side, the output end of the liquid nitrogen delivery pump 5 is fixedly connected with infusion tube 9, the input end of the liquid nitrogen delivery pump 5 is fixedly connected with delivery pipe, the lower end of the delivery pipe is arranged through the bottom of the liquid nitrogen tank 3, to facilitate extraction of liquid nitrogen, the lower end of the infusion tube 9 is fixedly connected with infusion sealing head 11, and the inside of the infusion sealing head 11 is provided with flow meter, one side of the liquid nitrogen delivery pump 5 is provided with vacuum pump 6, the input end of the vacuum pump 6 is fixedly connected with suction tube 10, and the lower end of the suction tube 10 is provided with detection assembly.

[0028] In the embodiment, when using, infusion tube 9 and suction tube 10 are taken out in protection box 7, then infusion sealing head 11 and suction sealing head 12 are connected with the corresponding connecting port of storage tank respectively, then vacuum pump 6 starts to extract the gas in the storage tank, and then the gas is transmitted to the corresponding gas collection mechanism through gas outlet pipe 15, then air pressure sensor 13 detects the internal air pressure to determine whether extraction is clean, after extraction is clean, liquid nitrogen delivery pump 5 starts to pour liquid nitrogen into the storage tank through infusion tube 9, and the flow rate of input is monitored by the flow meter in infusion sealing head 11, when about to fill, the rate of liquid nitrogen delivery pump 5 is reduced to prevent sputtering caused by too fast input of liquid nitrogen.

[0029] In one embodiment, as shown in Figure 5As shown, the sealing assembly includes two sealing blocks 19, which are slidably disposed on both sides of the infusion sealing head 11. Several springs 18 are fixedly connected to the two sealing blocks 19 on the side adjacent to the infusion sealing head 11. A limiting ring 20 is slidably connected to one end of the infusion sealing head 11. A push plate 21 is fixedly connected to the end of the limiting ring 20 away from the infusion sealing head 11. In use, the push plate 21 is pressed, and the other end of the limiting ring 20 is used to squeeze the sealing block 19 into the groove inside the infusion sealing head 11. Then, the infusion sealing head 11 is inserted into the connector. The push plate 21 is released, and the springs 18 rebound the sealing block 19 to seal and fix it to the connector, preventing the infusion sealing head 11 from being pushed open due to the increased gas pressure inside the liquid nitrogen.

[0030] In one embodiment, such as Figure 1 As shown, the detection component includes a vacuum sealing head 12, a solenoid valve 14 is fixedly connected to the middle of the vacuum sealing head 12, and a pressure sensor 13 is provided at the lower end of the vacuum sealing head 12. The pressure is transmitted to the corresponding gas collection mechanism through the air outlet pipe 15. Then, the pressure sensor 13 detects the internal pressure to determine whether the gas has been completely extracted.

[0031] In one embodiment, such as Figure 1 As shown, the output end of the vacuum pump 6 is fixedly connected to an outlet pipe 15 and is connected to a gas collection mechanism through the outlet pipe 15, and the gas is transmitted to the corresponding gas collection mechanism through the outlet pipe 15.

[0032] In one embodiment, such as Figure 1 As shown, a protective component is provided on one side of the filling component.

[0033] In one embodiment, such as Figure 1 As shown, the protective assembly includes a protective box 7, which is fixedly connected to the upper surface of the liquid nitrogen tank 3. A side door 8 is hinged to the upper surface of the protective box 7 via a hinge 17. Two limiting grooves 16 are opened on the side of the protective box 7 adjacent to the filling assembly. After the filling is completed, the infusion tube 9 and the suction tube 10 are stored inside the protective box 7.

[0034] In one embodiment, such as Figure 1 As shown, the liquid nitrogen tank 3 is provided with a liquid filling port 4 at the upper end.

[0035] In one embodiment, such as Figure 1 As shown, the lower end of the placement platform 1 is equipped with casters 2 to facilitate the movement of this device.

[0036] The above embodiment discloses a liquid nitrogen filling device which is convenient to adjust. When in use, the liquid delivery pipe 9 and the gas extraction pipe 10 are taken out from the protection box 7, and then the liquid sealing head 11 and the gas sealing head 12 are connected with the corresponding connecting ports of the storage tank respectively. Then the vacuum pump 6 is started to extract the gas in the storage tank, and then the gas is transmitted to the corresponding gas collection mechanism through the gas outlet pipe 15. Then the gas pressure sensor 13 detects the internal gas pressure to determine whether the extraction is complete. When the extraction is complete, the liquid nitrogen delivery pump 5 is started to start filling liquid nitrogen into the storage tank through the liquid delivery pipe 9. The flow meter in the liquid sealing head 11 monitors the input flow rate. When the storage tank is about to be filled, the liquid nitrogen delivery pump 5 is controlled to reduce the speed to prevent sputtering caused by too fast input of liquid nitrogen. After the filling is completed, the liquid delivery pipe 9 and the gas extraction pipe 10 are stored in the protection box 7.

[0037] The above merely provides a specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A liquid nitrogen filling device convenient to adjust, comprising a placing table (1), the upper surface of the placing table (1) is provided with a liquid nitrogen tank (3), and one side of the upper surface of the liquid nitrogen tank (3) is provided with a filling assembly; characterized in that the filling assembly comprises a liquid nitrogen delivery pump (5), the liquid nitrogen delivery pump (5) is fixedly connected with one side of the upper surface of the liquid nitrogen tank (3), the output end of the liquid nitrogen delivery pump (5) is fixedly connected with a liquid delivery pipe (9), the input end of the liquid nitrogen delivery pump (5) is fixedly connected with a delivery pipe, the lower end of the delivery pipe is arranged through the bottom of the liquid nitrogen tank (3), the lower end of the liquid delivery pipe (9) is fixedly connected with a liquid delivery sealing head (11), one side of the liquid nitrogen delivery pump (5) is provided with a vacuum pump (6), the input end of the vacuum pump (6) is fixedly connected with a gas suction pipe (10), the lower end of the gas suction pipe (10) is provided with a detection assembly, and the inside of the liquid delivery sealing head (11) is provided with a sealing assembly.

2. A liquid nitrogen filling device according to claim 1, wherein, the sealing assembly comprises a sealing block (19), the sealing block (19) is arranged on both sides of the liquid delivery sealing head (11) and is slidably arranged, a plurality of springs (18) are fixedly connected with the adjacent side of the liquid delivery sealing head (11) on both sides of the sealing block (19), one end of the liquid delivery sealing head (11) is slidably connected with a limiting ring (20), and the limiting ring (20) is fixedly connected with a push plate (21) away from one end of the liquid delivery sealing head (11).

3. The liquid nitrogen filling device of claim 1, wherein, the detection assembly comprises a gas suction sealing head (12), the gas suction sealing head (12) is fixedly connected with an electromagnetic valve (14) in the middle, and the lower end of the gas suction sealing head (12) is provided with a gas pressure sensor (13).

4. The liquid nitrogen filling device of claim 1, wherein, the output end of the vacuum pump (6) is fixedly connected with an air outlet pipe (15) and connected with a gas collection mechanism through the air outlet pipe (15).

5. The liquid nitrogen filling device of claim 1, wherein, One side of the filling assembly is provided with a protection assembly.

6. A liquid nitrogen filling device according to claim 5, wherein, the protection assembly comprises a protection box (7), the protection box (7) is fixedly connected with the upper surface of the liquid nitrogen tank (3), a side door (8) is hingedly connected to the upper surface of the protection box (7) through a hinge (17), and two limiting grooves (16) are formed in the adjacent side of the protection box (7) and the filling assembly.

7. The liquid nitrogen filling device of claim 1, wherein, The upper end of the liquid nitrogen tank (3) is provided with a liquid inlet (4).

8. The liquid nitrogen filling device of claim 1, wherein, The lower end of the placing table (1) is provided with a moving wheel (2).

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