The sand dust test box is called "sand dust test box", which simulates the damage of natural sand climate to the products. It is suitable for testing the sealing performance of the product's shell. It is mainly used for ip5x and ip6x tests specified in the shell protection level standard. Air flow with dust vertical circulation on the equipment, and dust for test can be recycled The whole air duct is made of imported high-grade stainless steel plate, the bottom of the air duct is connected with the conical hopper interface, the air inlet and outlet of the fan are directly connected with the air duct, and then the diffusion port on the top of the working chamber is connected with the working chamber body at a proper position, forming an "O" type closed vertical dust blowing circulation system, so that the air flow can flow smoothly and the dust can be distributed evenly as far as possible. A single high-power and low-noise centrifugal fan is used, and a frequency converter is used to adjust the wind speed according to the test requirements.


ST12 cold rolled plate is used for the outer box of the sand dust test box. After phosphating, the surface of the outer box is electrostatically sprayed. The whole outer box is directly welded and fixed on the base of the test box, which has the characteristics of firm structure and elegant appearance. The base of the test chamber is welded with high-strength channel steel.

A box door is set on the outer box of the sand dust test box. The box door is a single left box door. Its unique door lock can ensure smooth opening and closing, and adjust the tightness of the door and the sealing strip to prevent the leakage of sand dust. There is a window on the door of the box, which is made of toughened glass. The large area of the window is used to see the working condition easily. The windows are equipped with PU fluorescent lamps for lighting purposes.

3. Studio

The working room of sand dust test chamber is made of SUS304 stainless steel plate. The top of the working chamber is the air outlet of the sand dust air flow, and the bottom shape is a cone. The four planes are inclined, which is conducive to the fall of sand and dust, not to accumulate at the bottom. There are two shelves in the working room, and the upper and lower positions of the shelves can be adjusted. The shelves are also made of stainless steel. Another square screen made of stainless steel is set in the working room. The purpose of the square screen is to effectively pass through the dust and repeatedly blow the dust. Large dust or other falling parts (or impurities) are blocked, so that the dust blowing can be carried out smoothly. A test hole is arranged on the left side of the working room, which is directly connected with the external box body, so that the power line or signal line can enter the working room smoothly.

Silicone rubber sealing strip is used for the working room and the box door to ensure that the working room does not leak.

4. Dust blowing system

The dust blowing system of sand dust test chamber includes dust blowing, vibration and dust drying.

The dust blowing part is mainly composed of a fan, a dust blowing circulating air duct and a dust blowing air flow direction adjustment.

The dust blower is installed on the base of the test box, and its working parts are made of stainless steel. The air inlet of the fan is connected with the air outlet at the bottom of the studio, the air outlet of the fan is connected with the air duct, the other end of the air duct is the air outlet, and the air outlet is directly installed on the top of the studio. The air outlet is provided with an adjusting device for adjusting the air flow direction of dust blowing. The purpose of the regulating device is to blow dust more evenly. The direction of air circulation is clockwise vertical air flow from top to bottom. The connection flange of the whole dust blowing cycle is provided with sealing gasket.

The purpose of vibration is not to deposit sand dust at the bottom of the working room, so that sand dust can be recycled more effectively. The vibrator is installed on the outer surface of the inclined bottom surface of the working chamber. The vibration mode is unbalanced vibration of motor. In order to ensure that the vibration can be effectively carried out. The bottom part of the studio is connected with the studio by soft connection. When the bottom vibrates, try to reduce the influence on the working room and even on the test piece.

Due to long-term non use or the influence of climate factors (such as "plum rain" season), sand dust will contain a certain amount of water and become humid. At this time, the dust is not conducive to the test. Therefore, the dust must be dried. The main purpose of dust drying is to heat the air stream of blowing dust and to heat the dust. The heater is made of stainless steel, which is directly installed in the dust blowing circulating air duct. The heating temperature can be directly set and controlled by the instrument.

5. Electrical control system

The electrical control system of the sand dust test chamber is located on the right side of the front of the chamber. The control circuit board is located in the cabinet, and the control panel is equipped with dust drying temperature, total timing, dust blowing cycle and switch indicator lights for various functions.