Large-caliber, hoop-free and well-sealed plastic barrel

Abstract

A large-caliber, hoop-free and well-sealed plastic barrel, including a barrel body with a rim portion and a cover. The rim portion is provided with a sealing ring, whose outer peripheral surface is a first sealing surface. An outer side of the barrel body is provided with an annular clamp ring, which is arranged below the sealing ring. The cover is provided with a sealing groove fitting the rim portion. An outer surface of an inner side wall of the sealing groove tightly fit an inner wall of the rim portion. An inner surface of an outer side wall of the sealing groove is provided with a second sealing surface in a seal fit with the first sealing surface. An outer peripheral surface of the cover is provided with a hook strip, whose inner side wall is provided with a flange to be clamped with the clamp ring.

What is claimed is: 
     
         1 . A hoop-free plastic barrel, comprising:
 a barrel body with a rim portion; and   a cover configured for sealing the rim portion;   wherein a side edge of the rim portion of the barrel body is provided with a sealing ring; an outer peripheral surface of the sealing ring is a first sealing surface; an outer side of the barrel body is provided with an annular clamp ring; the annular clamp ring is arranged below the sealing ring; the cover is provided with a sealing groove configured for fitting the rim portion; the sealing groove comprises an inner side wall and an outer side wall; wherein the inner side wall of the sealing groove is close to a center of the barrel body, and the outer side wall of the sealing groove is away from the center of the barrel body; pan outer side surface of the inner side wall of the sealing groove tightly fit an inner wall of the rim portion; an inner side surface of the outer side wall of the sealing groove is provided with a second sealing surface in a seal fit with the first sealing surface; an outer peripheral surface of the cover is provided with a hook strip corresponding to the annular clamp ring; and an inner side wall of the hook strip is provided with a flange configured to be clamped with the annular clamp ring.   
     
     
         2 . The hoop-free plastic barrel of  claim 1 , wherein the hook strip is connected to a lower end of the outer side wall of the sealing groove; and an inner side of a connection between the hook strip and the outer side wall of the sealing groove is provided with a tearing groove. 
     
     
         3 . The hoop-free plastic barrel of  claim 2 , wherein the cover is provided with a cover opening wrench; the hook strip is annularly arranged below the outer side wall of the sealing groove; a head end of the hook strip and a tail end of the hook strip are arranged at two sides of the cover opening wrench, respectively; and the head end of the hook strip is provided with a pull strip configured to facilitate tearing away the hook strip. 
     
     
         4 . The hoop-free plastic barrel of  claim 3 , wherein a connection between the cover opening wrench and the outer side wall of the sealing groove is provided with the tearing groove. 
     
     
         5 . The hoop-free plastic barrel of  claim 3 , wherein the outer side of the barrel body is provided with an annular retaining ring; and a lower end of the cover opening wrench extends to an upper end surface of the annular retaining ring. 
     
     
         6 . The hoop-free plastic barrel of  claim 1 , wherein the outer peripheral surface of the sealing ring is vertically provided with the first sealing surface; the inner side surface of the outer side wall of the sealing groove is provided with a protrusion ring; and the protrusion ring is provided with the second sealing surface in a seal fit with the first sealing surface. 
     
     
         7 . The hoop-free plastic barrel of  claim 6 , wherein a thickness of an upper edge of the rim portion is larger than a distance between the first sealing surface and the second sealing surface. 
     
     
         8 . The hoop-free plastic barrel of  claim 7 , wherein the thickness of the upper edge of the rim portion is 0.1-1 mm larger than the distance between the first sealing surface and the second sealing surface. 
     
     
         9 . The hoop-free plastic barrel of  claim 6 , wherein a lower end surface of the protrusion ring is provided with an inclined surface configured to facilitate an installation of the barrel body.