Mother-child tankThe liquid nitrogen composite container includes a sub-tank, a piping system, an interlayer, a mother tank, a measurement and control system, safety accessories, and an external operating platform. The exterior of the liquid nitrogen composite container is painted and installed on a foundation platform. Five sub-tanks are arranged in a concentric regular polygon, and the piping system is laid out in the area from the five sub-tanks to the center of the mother tank.

The structure of the five sub-tanks is vertical cylindrical, supported by feet at the bottom, and each sub-tank is equipped with a filling port, a vent port, an external pressurization port, and an upper filling port. This utility model can achieve pouring, pressurization, depressurization, and real-time monitoring processes, making it an ideal large-scale liquid nitrogen storage and supply device. The mother-child tank is used for liquid nitrogen storage and supply containers, employing a pressure extrusion method for external liquid discharge operations that are simple and reliable. Pressurized storage reduces discharge losses during the storage period, and manufacturing and installation are easier than spherical tanks, resulting in lower manufacturing and installation costs, thus providing higher safety, stability, and controllability. Now, let's learn about the method of making a mother-child tank!

　　Mother-child tankThe combination container type refers to an inner tank composed of multiple sub-tanks (more than three) in parallel to meet the requirements for large-capacity storage at low-temperature liquid storage stations. Multiple sub-tanks are assembled side by side on the main tank. Its advantages include: no need for a liquid pump for discharge, using a squeezing method for external discharge, simple and reliable operation, pressurized storage reduces discharge losses during the storage period, easier manufacturing and setup compared to spherical tanks, lower manufacturing and setup costs. If this form is used for liquid nitrogen supply containers, it can provide higher economic efficiency, stability, and controllability for large liquid nitrogen storage and supply equipment, but there are major design issues in the current design.

1) Design of the interlayer insulation form for large low-temperature containers and the filling method for pearl interlayers;

2) Generally, a single safety accessory is set, with safety valves being delayed and rupture discs being single-use, which is difficult to meet safety requirements.

3) Design of the mother tank body structure;

4) All liquid phase outlet piping and joint forms of the outer tank;

5) How to improve the convenience of sub-tank operation;

6) For sub-tank liquid delivery, how to avoid excessive local temperature difference stress during filling;

7) A complete main engine system design.

8) For large low-temperature containers, structural design to reduce cold loss;

9) Comprehensive design for small flow filling and large flow filling.

New content of the mother-child tank utility model.

This utility model addresses the problems existing in the prior art by providing a sub-tank type liquid nitrogen composite container, solving the issues present in the existing technology.

To achieve the above objectives, the technical solution of this utility model is as follows:

The mother-child tank is divided into a sub-tank safety protection device, a main tank pressure relief device, and an interlayer protection device. The sub-tank safety protection device is equipped on the five sub-tanks, leading out from the front end of the sub-tank, and the end is connected to a three-way valve in parallel with a safety valve and a rupture disc; the pressure relief device of the mother tank includes the pressure relief device of the outer tank and a breathing valve; the interlayer protection device introduces nitrogen from an external nitrogen source into the interlayer, with a pressure regulating valve and a parallel nitrogen bypass valve installed on the pipeline, and pressure gauges installed at both ends of the pressure regulating valve, with a pressure sensor and analyzer installed at the rear end of the pressure regulating valve.

The above is the introduction of theMother-child tankmethod of making it. If you need to know more, feel free to contact us!