Chemical storage tank

Abstract

A chemical storage tank includes at least a main body and two sealing members combined together with each other. The main body is formed as a cylinder or other shapes, integrally made of acid-proof and alkali-proof plastic materials, with a storage space formed inside it for storing any chemical material or product, and with a circumferential wall having its upper and its lower end respectively formed with a connecting opening. The sealing members are integrally made of the same plastic material of the main body, respectively combined together with the upper and the lower connecting opening of the main body by plastic welding. Thus, the welding portions between the main body and the sealing members are located around the circumferential wall, able to prevent pressure in the tank from damaging the chemical storage tank to insure safety.

1 . A chemical storage tank comprising:
 at least a main body integrally made of acid-proof and alkali-proof plastics and provided with a storage space formed inside it, a connecting opening formed in two ends of a circumferential wall of said main body; and   at least two sealing members integrally made of acid-proof and alkali-proof plastics and respectively provided with a circumferential wall having a connecting opening formed in its two ends respectively, said connecting opening combined together with said connecting opening of said main body by plastic welding.   
   
   
       2 . The chemical storage tank as claimed in  claim 1 , wherein said main body and said sealing members are made of a same material. 
   
   
       3 . The chemical storage tank as claimed in  claim 1 , wherein each of said sealing members is provided with a linking portion formed with an arc for jointing its circumferential wall and its top portion. 
   
   
       4 . The chemical storage tank as claimed in  claim 1 , wherein each of said sealing members is provided with plural reinforcing ribs positioned spaced apart equidistantly in said top portion.