Rain box capable of accurately controlling rainfall and test method for accurately controlling rainfall of rain box

Abstract

The invention discloses a rain box capable of accurately controlling rainfall and a test method for accurately controlling rainfall of the rain box, the rain box comprises a test box body, the test box body comprises a rain disc, a sample turntable and a water tank, the water tank comprises various functional holes, and circulating water is adopted in a rain test. The waterway principle of the method for accurately controlling the rainfall comprises a ball valve, a water pump, a bypass proportional valve, a flow meter, a precision filter, a pressure sensor, a water inlet electromagnetic valve,a rain tray, a needle head, a liquid level floating ball, an emptying electromagnetic valve, a ventilation electromagnetic valve and an air pressure regulator. The beneficial effects of the inventionare that the rainfall control method achieves the PID automatic and precise regulation and control of the rainfall; the first water supplementing time problem is solved; after water is replenished, the water in the water disc can be locked, and when a sample is replaced or other rainfall tests are set, the test can be directly started without replenishing water again.

Description

technical field [0001] The invention relates to the field of rain test equipment, in particular to a rain box capable of precisely controlling rainfall and a test method for precisely controlling rainfall in the rain box. Background technique [0002] In the waterproof test, the artificial rain method is used to test the waterproof grades of IPX1 and IPX2. In the military standard rain, it also involves the use of rain disks for rainfall simulation to test the use and preservation of equipment or components in simulated rainfall. Whether it is the national standard waterproof test or the military standard rain test, it involves a simulated test of rainfall. [0003] In the existing technology, the rainfall is controlled by controlling the height of the liquid level in the rain tray. There is a corresponding relationship between height and rainfall in the national standard. How to accurately control the rainfall is not mentioned in many patents. The waterproof test equipment...

AI Technical Summary

Problems solved by technology

[0004] 1. The floating ball is used as the sensor to control the liquid level, and the position of the floating ball needs to be installed accurately. If there are several kinds of rainfall, the number of floating balls may be increased to control multiple liquid level heights, which will increase the complexity of equipment control

[0005] 2. When the liquid level is used as the control rainfall, the liquid level will float up and down on the target liquid level, the pump will face frequent start and stop, poor control accuracy and affect the service life of the pump

[0006] 3. When the height of the liquid level is used as the control rainfall, the incomplete level of the rain plate will lead to uneven rainfall, which is more obvious on the military standard rain box (because it involves the lifting of the rain plate and the height of 3m)

[0008] 5. It takes a long time to replenish water for the first time. Even if the test is continued or the sample is replaced, the water will be replenished to the specified liquid level.

Images