Multi-point pressure regulating device and method for external liquid nitrogen storage tank for large space ring mold system

Abstract

The invention discloses an external liquid nitrogen storage tank multi-point pressure regulating device for a large space circular mould system. The external liquid nitrogen storage tank multi-point pressure regulating device comprises liquid nitrogen storage tanks, a pressurizing liquid discharging pipeline, a storage tank pressurizing valve, a bypass pressurizing valve, a bypass pressurizing pipeline, an external pressure regulator, a storage tank pressure sensor, a gas returning pipeline, a storage tank pressurizer, a storage tank gas returning valve, a bypass gas returning valve, a bypass gas returning pipeline, a measuring and controlling cable, a control computer. The control computer controls the external pressure regulator to realize independent pressure controlling over the multiple storage tanks, and the storage tank pressurizing valve, the storage tank pressurizer and the storage tank gas return valve can also independently realize storage tank pressure manual controlling. According to the external liquid nitrogen storage tank multi-point pressure regulating device for the large space circular mould system, a multipled control device of an electromagnetic valve group, a pneumatic regulating valve group and a manual valve group is adopted, a programmed mode and a manual control mode are achieved, stable and efficient pressure automatic controlling can be achieved, and it can be ensured that the system can still work normally and be repaired in time when an electromagnetic valve or a pneumatic valve fails.

Description

technical field [0001] The invention relates to the low temperature field, in particular to an external liquid nitrogen storage tank multi-point pressure regulating device and method for a large space ring mold system. Background technique [0002] Spacecraft generally need to conduct space environment tests. Large-scale space ring mold systems are generally equipped with multiple liquid nitrogen storage tanks. Storage tank pressure control is one of the key factors in the test. At present, the pressure of the liquid nitrogen storage tank used in the large-scale space ring die system is generally adjusted manually or controlled by a simple solenoid valve group, which has poor control accuracy, low degree of automation, and low reliability. Contents of the invention [0003] The problem solved by the present invention is that an automatic, stable and reliable adjustment technology that can realize different pressure requirements of multiple liquid nitrogen storage tanks is ...

AI Technical Summary

Problems solved by technology

At present, the pressure of the liquid nitrogen storage tank used in the large-scale space ring die system is generally adjusted manually or controlled by a simple solenoid valve group, which has poor control accuracy, low degree of automation, and low reliability.

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