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Matters needing attention when using liquid nitrogen tank to store and transport livestock semen

Time: 2020-09-28 10:21 Source: unknown Author: Bander liquid nitrogen tank Click: second
use liquid nitrogen tank In addition to mastering how to maintain the semen of livestock and poultry during storage and transportation liquid nitrogen tank Besides technology, we should also be clear about it liquid nitrogen tank What should I pay attention to.

The following points should be paid attention to when using liquid nitrogen tank:

l. Before use, a small amount of liquid nitrogen should be injected to make it precooled. When the temperature in the tank reaches the liquid nitrogen temperature, the tank should be filled with liquid nitrogen until it is full.

2. Pay attention to check the amount of liquid nitrogen. The measurement methods of liquid nitrogen are as follows:

(1) Take a wooden stick with a diameter of 5cm and a length of 80em. After peeling off the skin, paint it with black. Set a scale every 5 em from one end. When measuring, insert the zero scale downward from the opening of the liquid nitrogen tank to the bottom of the tank. Take it out after 5-10S. The frosting length is the liquid nitrogen capacity in the tank. If the liquid nitrogen capacity in the tank is less than 1 / 3 of the total capacity, liquid nitrogen should be added.

(2) The weight measurement method first weighs the empty tank, then weighs the weight when filled with liquid nitrogen, and then subtracts the weight of empty tank to get the total weight of liquid nitrogen in the tank. After that, weigh the liquid nitrogen tank every 3-5 days. When the weight of liquid nitrogen in the tank is less than 1 / 3 of the total weight of liquid nitrogen, nitrogen should be filled.

3. When storing semen, the variety, number and date of receiving semen should be marked.

4. When taking and putting semen, the forceps or spoon for semen should be precooled in advance, and then the bucket or semen should be lifted to the neck of liquid nitrogen tank, which should not be exposed outside the neck mouth.

5. Semen should be taken stably, accurately and quickly. The residence time in the neck should not exceed 15s. After semen extraction, it should be covered in time.

6. When transferring preservation containers, the operation time of transferring from one container to another should not exceed 5S, otherwise, semen vitality will be affected and conception rate will be reduced.

7. Pay attention to check the neck plug and the small groove of the neck plug at any time, remove the ice on the plug in time, and do not place plastic cloth on the plug. When it is found that the liquid nitrogen consumption rate is too fast or there are water droplets around the neck mouth of the liquid nitrogen tank, the sealing performance of the liquid nitrogen tank is poor, and the neck plug and small groove should be adjusted.

8. When moving, pay attention to handle with care to prevent collision and extrusion. When moving, do not drag on the ground, but lift up. liquid nitrogen tank

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