High-pressure gas cylinder

Abstract

An improved high-pressure gas cylinder is provided, which includes a container and a plug. The container has an air passage which communicates an interior of the container with an exterior of the container. The plug includes a body and a sealing sheet, wherein the body is fixed in the air passage. The body has a hole which communicates with the interior of the container, and the sealing sheet covers the hole. The body and the sealing sheet are integral. Whereby, the plug is able to tightly seal the container to reduce the possibility of wasting gas; additionally, the manufacturing process would be less complicated and efficient with the simplified plug.

What is claimed is: 
     
         1 . A high-pressure gas cylinder, comprising:
 a container having an air passage which communicates an interior of the container with an exterior of the container; and   a plug comprising a body and a sealing sheet, wherein the body is located in the air passage; the body has a hole which communicates with the interior of the container, and the sealing sheet covers the hole; the body and the sealing sheet are integral.   
     
     
         2 . The high-pressure gas cylinder of  claim 1 , wherein an outer circular groove is formed on an outer wall of the body; the high-pressure gas cylinder further has an outer sealing ring embedded in the outer circular groove, wherein the outer sealing ring abuts against a passage wall of the air passage with an outer surface thereof. 
     
     
         3 . The high-pressure gas cylinder of  claim 1 , wherein an inner circular groove is formed on a wall surrounding the hole of the body; the high-pressure gas cylinder further has an inner sealing ring embedded in the inner circular groove. 
     
     
         4 . The high-pressure gas cylinder of  claim 2 , wherein an inner circular groove is formed on a wall surrounding the hole of the body; the high-pressure gas cylinder further has an inner sealing ring embedded in the inner circular groove. 
     
     
         5 . The high-pressure gas cylinder of  claim 1 , wherein the air passage of the container has a first air passage and a second air passage which communicates with the first air passage; the first air passage communicates with the exterior of the container, and the second air passage communicates with the interior of the container, wherein an internal diameter of the first air passage is greater than that of the second air passage, and a stop surface is formed between the first air passage and the second air passage; the plug is fixed in the first air passage, wherein a bottom surface of the plug contacts the stop surface of the container. 
     
     
         6 . The high-pressure gas cylinder of  claim 5 , wherein the container has a stop ring surrounding an opening of the container, and formed by bending; the body has a first section and a second section connected to the first section, wherein the bottom surface of the plug is formed on the first section; an external diameter of the second section is smaller than that of the first section, and a shoulder is formed between the first section and the second section; the stop ring of the container abuts against the shoulder of the body. 
     
     
         7 . The high-pressure gas cylinder of  claim 1 , wherein the sealing sheet of the plug is provided at a top of the hole of the body; the top of the hole is close to the exterior of the container. 
     
     
         8 . The high-pressure gas cylinder of  claim 1 , wherein the sealing sheet of the plug is provided at a bottom of the hole of the body; the bottom of the hole is close to the interior of the container.