Sealing package box pressure control device

Abstract

The invention provides a sealing package box pressure control device, which comprises an inflation and pressure supplement unit, a pressure discharge unit and a computer control unit. The inflation and pressure supplement unit comprises a reducing valve, an inflation solenoid valve, a pressure regulator, a pressure supplement solenoid valve and a pressure sensor which are sequentially connected in series into a pipeline communicating with an air inlet end of a sealing package box. An air inlet end of the reducing valve communicates with an air source. The pressure discharge unit comprises a pressure discharge solenoid valve connected in series into a pipeline communicating with an air outlet end of the sealing package box. The inflation solenoid valve, the pressure regulator, the pressure supplement solenoid valve, the pressure discharge solenoid valve and the pressure sensor are all electrically connected with the computer control unit. According to the invention, the sealing package box pressure control device increases the working efficiency and pressure control accuracy, is capable of real-time pressure regulation inside the package box so as to keep balanced pressure, and provides reliable guarantee for the transport of large valuable and precise items which are sensitive to pressure change and have special requirements.

Description

technical field [0001] The invention relates to a device capable of real-time control of the pressure inside a sealed packing box so as to keep the pressure in a balanced state all the time. Background technique [0002] For expensive, sophisticated and large items with special requirements, the internal pressure of the packaging box is often changing due to factors such as altitude and air pressure during transportation, and changes in pressure will cause damage to the items to a certain extent; keep the sealed packaging box Always maintaining a defined equilibrium of pressure is a prerequisite for the safe transport of such items. [0003] At present, the commonly used pressure control methods are the pointer reading inflation and exhaust method and the feedback control overpressure inflation and exhaust method. The exhaust operation keeps the pressure inside the tank in a stable range. The whole process is carried out manually, which has the disadvantages of low precisio...

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used pressure control methods are the pointer reading inflation and exhaust method and the feedback control overpressure inflation and exhaust method. The exhaust operation keeps the pressure in the box in a stable range. The whole process is carried out manually, which has the disadvantages of low precision, high cost, low efficiency, and potential safety hazards.

Feedback control overpressure charging and exhausting is to use high-pressure gas to supplement the air pressure in the tank. It is necessary to switch the filling and exhausting valves frequently to ensure the stability of the pressure in the tank. Further changes in pressure will increase the frequency of switching valves, seriously affecting the service life of equipment

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