Compressor

Abstract

A compressor includes: a cylinder main body; a valve block; a cylinder head; a first seal group composed of a plurality of seal parts; and a second seal group composed of a plurality of seal parts. The valve block includes a guide-out flow passage which opens between the seal parts composing the first seal group and opens between the seal parts composing the second seal group. The guide-out flow passage is linked to an outer pipe for conveying a leaked gas from a compression chamber to a predetermined place.

1 . A compressor of a reciprocating type for compressing a combustible gas, the compressor comprising:
 a piston;   a cylinder main body which receives the piston inserted therein;   a valve block fixedly attached to the cylinder main body at a portion thereof closer to a leading end of the piston and formed with a through hole;   a cylinder head fixedly attached to the valve block at a portion thereof opposite to the cylinder main body and including an insertion part to be inserted in the through hole;   a first seal group composed of a plurality of seal parts arranged between the valve block and the cylinder main body; and   a second seal group composed of a plurality of seal parts arranged between the valve block and the insertion part of the cylinder head, wherein the piston, the cylinder main body, the insertion part, and the valve block define a compression chamber thereamong, and   the valve block has a guide-out flow passage which opens between the seal parts composing the first seal group arranged between the valve block and the cylinder main body, and opens between the seal parts composing the second seal group arranged between the valve block and the insertion part,   the guide-out flow passage being linked to a pipe for conveying a leaked gas to a predetermined place.   
     
     
         2 . The compressor according to  claim 1 , wherein
 the guide-out flow passage includes:
 a first flow passage extending in one direction from a region between the valve block and the cylinder main body; 
 a second flow passage extending in the one direction from a region between the valve block and the insertion part of the cylinder head; and 
 a connection flow passage connecting the first flow passage and the second flow passage with each other and linked to the pipe. 
   
     
     
         3 . The compressor according to  claim 2 , wherein
 the connection flow passage has a section allowing a leaked gas from the first flow passage and a leaked gas from the second flow passage to marge therein and the merged gas to flow therethrough, the section having an inner diameter larger than an inner diameter of each of the first flow passage and the second flow passage.   
     
     
         4 . The compressor according to  claim 1 , wherein
 a first widen part is defined between the valve block and the cylinder main body so as to extend in a circumferential direction and form a gap between the valve block and the cylinder main body, and   the guide-out flow passage opens to the first widen part.   
     
     
         5 . The compressor according to  claim 1 , wherein
 a second widen part is defined between the valve block and the insertion part of the cylinder head so as to extend in a circumferential direction and form a gap between the valve block and the insertion part, and   the guide-out flow passage opens to the second widen part.   
     
     
         6 . The compressor according to  claim 1 , wherein
 at least one of a seal part located closer to the compression chamber than a position where the guide-out flow passage opens among the seal parts composing the first seal group and a seal part located closer to the compression chamber than another position where the guide-out flow passage opens among the seal parts composing the second seal group has a sealing member and a backup ring disposed adjacent to the sealing member.