Vacuum testing box / vacuum test box for tank bottom weld
Vacuum leak detection box evacuator for tank bottom weld is suitable for vacuum leak test
The vacuum leak detection box is made of a thin plate into a bottomless rectangular box. The top of the box is tightly inlaid with a thick glass. The four sides of the bottom of the box are covered with airtight sponge rubber, so that the box is tightly buckled on the bottom plate. The box is painted with reflective white paint. The box is equipped with a short exhaust pipe and an intake valve. When testing the welding seam, first apply soapy water to the welding seam, then buckle the vacuum box, use the vacuum pump to draw the inside of the box to a vacuum of 55kPa, preferably above -70KPa; observe whether there are bubbles in the box, if any Bubbles should be marked and repaired.
Vacuum leak detection box evacuators for tank bottom welds are often used to inspect tank welds, especially circumferential welded parts, and are not often used for the entire tank bottom.
Vacuum leak detection box evacuator at the bottom of the tank is installed outside the vacuum box, and a certain negative pressure value is generated by compressed air of 0.5MPa, generally above -70KPa, to achieve a vacuum leak test of the weld
How to use the vacuum detection box:
1. If the user has a vacuum pump for vacuuming, the test box can be used directly without vacuum ejector;
2. If the compressed air evacuation test is used, the test box and the vacuum ejector must be used together;
3. The bottom of the detection box is sealed with a vacuum rubber sealing strip.
4. The length of welding seam is 600mm.
5. The detection box window is tempered glass.
6. The detection box is equipped with a gas release valve (1/2 ") and a vacuum gauge (Y-60).
7. Size: around 750 * 250 * 150 or 550 * 180 * 142
Basic working principle of the cargo / принцип работы: The vacuum flow rate is generated by the flow rate of compressed air, and the vacuum box is covered on the weld line when using, the compressed air is connected, and the vent valve is closed. Apply soapy liquid to the weld line and observe the surface quality of the weld. If there are pores, bubbles will form on the weld surface. If the welding seam overlap is relatively high, when the vacuum is evacuated, the sealing part of the lower part of the vacuum box is forced to be compacted without leakage, so that the negative pressure will continue to rise. After the pumping is completed, the vent valve is opened, and then the vacuum box can be moved by deflation and pressure relief.
Goods use / Куда иÑпользуетÑÑ: Used to inspect the quality of the weld at the bottom of the tank
Equipment composition: vacuum box (rectangular body); evacuator (three-way air compressor intake pipe); vacuum gauge (Y-60, 0-0.1MPa);
Vent valve (ZG1 / 4 â€); articulation (connecting the vacuum box and the evacuator); sealing strip (two sets, used for sealing the vacuum box and the bottom plate), double-wire joint and valve (for connecting the evacuator and the vacuum box) Above, such as closing the valve when the air compressor is suspended)

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