Trough connection method

Abstract

The invention relates to a trough connection method. A trough is made of PVC material. In the method, a C-shaped pipe made of the PVC material is clamped at the joint of two adjacent troughs in a downward opening manner; then two sides of the opening of the C-shaped pipe are welded on the two troughs by using welding rods made of the PVC material; and the C-shaped pipe is completely sealed with the troughs. By using the connection method, when the trough containing etching liquid deforms due to thermal expansion and cold contraction, the C-shaped PVC pipe deforms with the deformation of the trough, so that the etching liquid can not leak off from the joint of welding seams, thus avoiding the corrosion to peripheral equipment.

Description

technical field [0001] The invention relates to a tank body connection method, in particular to a tank body connection method for preventing liquid leakage at the joint of etching liquid tank bodies. Background technique [0002] Now it is used to hold the etching solution (the main component is H 2 o 2 , HCl, etc.) is generally PVC (polyvinyl chloride) material, such as attached figure 1 As shown, in the prior art, the joints of the tank body are usually covered with silica gel first, and then U-shaped PE (polyethylene) clips are pressed. Because this kind of tank is made of PVC material, the temperature in the tank is above 50°C during normal production. When the tank is maintained or shut down for a long time, the temperature will drop. The tank will be deformed due to shrinkage, and the connection will be separated during maintenance. It is soft, while the PVC tank is hard, and the expansion and contraction coefficients are different, which leads to poor sealing. In a...

AI Technical Summary

Problems solved by technology

Because this kind of tank is made of PVC material, the temperature in the tank is above 50°C during normal production. When the tank is maintained or shut down for a long time, the temperature will drop. The tank will be deformed due to shrinkage, and the connection will be separated during maintenance. It is soft, while the PVC tank is hard, and the expansion and contraction coefficients are different, which leads to poor sealing. In addition, the PE card strip will also arch due to heat deformation

The etchant in the tank is highly volatile, and will come out from a small gap to form crystals, which makes it difficult to deal with the leakage at the joint of the tank and causes corrosion to peripheral equipment.

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