Online weighing device for low-temperature container

Abstract

An online weighing device for a low-temperature container comprises a connecting pipe, an electronic scale, a container and a refrigeration box body, the connecting pipe is installed at the top of the container, concentric circular holes are formed in the center of the electronic scale and the center of the top of the refrigeration box body, the container is inserted into the refrigeration box body through the circular holes, and the container is connected with the electronic scale. And the container is connected with the electronic scale through the connecting device. Compared with the original material receiving and weighing equipment and method, the online weighing device for the low-temperature container has the advantages that the reading deviation of the weighing in the material receiving process can be eliminated, the weighing deviation of the container is reduced, the repeated weighing and repeated filling frequency of the container is greatly reduced, the working efficiency of workers is improved, and the labor intensity of the workers is reduced. And meanwhile, the working time of workers in a severe environment is shortened, the irradiation dose borne by the workers is reduced, and the labor cost of production is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of weighing devices, in particular to an online weighing device for a low-temperature container. Background Art

[0002] At present, according to the production needs of centrifuge factories, products must be collected quantitatively according to requirements; products enter the sub-packaging or receiving container through fixed pipelines, and the sub-packaging or receiving container is frozen in a low-temperature environment of liquid nitrogen at -196℃, so that the working material condenses in the container. In order to achieve quantitative collection, process personnel often weigh the Diva bottle and the container together on a scale, and the weighing data often has a large deviation.

[0003] Before receiving the material, place the container in the Diva bottle, and connect the container to the system through a connecting pipe. After the vacuum is qualified, add liquid nitrogen at a specified level into the Diva bottle, record the scale reading at this time, and then record M1. The container needs to maintain the liquid nitrogen level of -196℃ at the specified scale throughout the process to ensure the low temperature state of the sub-packaging container and the relative accuracy of the scale data. The parameter at the end of receiving the material is recorded as M2. When the difference between M2 and M1 meets the required loading amount, stop receiving the material.

[0004] The current weighing process has the following defects: ① Liquid nitrogen level deviation has a great impact on weighing data. ② Frosting of the container has a great impact on weighing data. ③ The weighing accuracy of the platform scale is low and the weighing deviation is large. Utility Model Content

[0005] The purpose of the utility model is to optimize and improve the current material receiving and weighing method, and to design a device that can weigh the online working container in real time in view of the problem of repeated filling and weighing caused by the current container filling amount deviation, so as to avoid the weighing deviation caused by the different liquid nitrogen levels in the container and reduce the influence of the container frosting on the weighing data.

[0006] The utility model provides the following technical solution: an online weighing device for a low-temperature container, comprising a connecting pipe, an electronic scale, a container, and a refrigeration box, wherein the connecting pipe is installed on the top of the container, the center of the electronic scale and the top center of the refrigeration box are both provided with concentric circular holes, the container is inserted into the refrigeration box through the circular holes, and the container is connected to the electronic scale.

[0007] The utility model also comprises a connecting device, through which the container is connected to the electronic scale.

[0008] The electronic scale is provided with a heating device for heating the part of the container outside the refrigeration box.

[0009] The heating temperature of the electronic scale heating device is 50°C.

[0010] The refrigeration box provides a low temperature environment for the container.

[0011] The relationship between the diameter D of the concentric circular hole between the center of the electronic scale and the top center of the refrigeration box and the diameter d of the container is: (d+5)mm≤D≤(d+10)mm.

[0012] The weighing accuracy of the electronic scale is less than 2g.

[0013] The electronic scale has the functions of zeroing and tare.

[0014] The electronic scale has the functions of setting alarm value and alarm.

[0015] Beneficial Effects

[0016] Compared with the prior art, the utility model has the following advantages: compared with the original material receiving weighing equipment and method, after adopting the low-temperature container online weighing device, it can eliminate the reading deviation of the scale during the material receiving process, reduce the deviation of the container weighing, greatly reduce the frequency of repeated weighing and repeated filling of the container, improve the work efficiency of the staff, and at the same time reduce the working hours of employees in harsh environments, reduce the radiation dose received by employees, and reduce the labor cost of production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of an online weighing device for a cryogenic container;

[0018] In the figure: connecting pipe 1, electronic scale 2, container 3, connecting device 4, refrigeration box 5. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0021] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] An online weighing device for a low-temperature container comprises a connecting pipe 1, an electronic scale 2, a container 3, a connecting device 4, and a refrigeration box 5. The connecting pipe 1 is installed on the top of the container 3. The center of the electronic scale 2 and the top center of the refrigeration box 5 are both provided with concentric circular holes, and the size of the circular holes matches that of the container 3. The container 3 is inserted into the refrigeration box 5 through the circular holes, and the container 3 is connected to the electronic scale 2 through the connecting device 4, so that the electronic scale 2 can weigh the weight of the container 3.

[0023] The electronic scale 2 has a heating device, which can heat the portion of the container 3 outside the refrigeration box 5;

[0024] There is liquid nitrogen in the refrigeration box 5 for cooling;

[0025] The specific work includes the following steps:

[0026] ① Start electronic scale 2, check and clear the reading;

[0027] ② Place the container 3 into the round hole of the electronic scale 2;

[0028] ③ The connecting pipe 1 of the container 3 is installed and connected, and the vacuum measurement is qualified;

[0029] ④Start electronic scale 2, check and tare the weight;

[0030] ⑤ Put the container 3 into liquid nitrogen or air cooling box for freezing;

[0031] ⑥ Start the heating function of the electronic scale 2 to heat the neck of the container 3 to prevent frost above the neck after the container is frozen; ⑦ After the container 3 is fully frozen, the material is collected and the reading of the electronic scale 2 increases accordingly;

[0032] ⑧When the double reading of the electronic scale reaches the specified loading amount, it stops working.

[0033] According to the above operation, the freezing container can be free from interference from factors such as liquid nitrogen, and there is no influence of frost on the container filling amount, which reduces the interference factors of container weighing, improves the weighing accuracy, and achieves the purpose of reducing the number of repeated fillings.

[0034] During the work, the following aspects are explained:

[0035] ① The new electronic scale weighs the container and has nothing to do with the liquid nitrogen level.

[0036] ②Heating temperature: 50℃.

[0037] ③Electronic scale 2 has the function of setting alarm value and alarm

[0038] ④Weighing accuracy of electronic scale 2: less than 2g.

[0039] ⑤The electronic scale 2 has the functions of zeroing and tare.

[0040] The relationship between the diameter D of the container 3 entrance (i.e., the circular hole at the center of the electronic scale 2 and the top center of the refrigeration box 5) and the diameter d of the container 3 is:

[0041] (d+5)mm≤D≤(d+10)mm.

[0042] The above description is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An online weighing device for a cryogenic container, characterized in that: The invention comprises a connecting pipe (1), an electronic scale (2), a container (3), and a refrigeration box (5), wherein the connecting pipe (1) is installed on the top of the container (3), the center of the electronic scale (2) and the top center of the refrigeration box (5) are both provided with concentric circular holes, the container (3) is inserted into the refrigeration box (5) through the circular holes, and the container (3) is connected to the electronic scale (2); The relationship between the diameter D of the concentric holes at the center of the electronic scale (2) and the top center of the refrigeration box (5) and the diameter d of the container (3) is: (d+5) mm≤D≤(d+10) mm; The weighing accuracy of the electronic scale (2) is less than 2g; The electronic scale (2) has zeroing and tare functions; The electronic scale (2) has a setting alarm value and an alarm function.

2. The online weighing device for cryogenic containers according to claim 1, characterized in that: It also comprises a connecting device (4), and the container (3) is connected to the electronic scale (2) via the connecting device (4).

3. The online weighing device for cryogenic containers according to claim 1, characterized in that: The electronic scale (2) has a heating device for heating the portion of the container (3) outside the refrigeration box (5).

4. The online weighing device for cryogenic containers according to claim 3, characterized in that: The heating temperature of the heating device of the electronic scale (2) is 50°C.

5. The online weighing device for cryogenic containers according to claim 1, characterized in that: The refrigeration box (5) provides a low-temperature environment for the container.

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