Method of manufacturing plunger pump and plunger pump

Abstract

A method of manufacturing a plunger pump includes a temperature difference generation process of generating a difference in temperature with respect to a normal temperature state for either one of an outer cylinder or an inner cylinder, a cylinder insertion process of inserting the inner cylinder inside the outer cylinder in a state in which the inner cylinder has a smaller outer diameter than an inner diameter of the outer cylinder as a result of the temperature difference generated by the temperature difference generation process, an elimination process of eliminating the generated temperature difference, and a plunger placement process of placing a circular tube-shaped plunger in a pressure chamber of the inner cylinder so as to enable of reciprocating motion by the plunger.

1 . A method of manufacturing a plunger pump for connection to a pulverizer, the pulverizer including a pulverization flow path through which a preparation is passed in order to pulverize the preparation, the plunger pump being configured to feed the preparation into the pulverizer under high pressure and being configured from an outer cylinder and an inner cylinder formed with a circular tube-shaped pressure chamber, the method comprising:
 a temperature difference generation process of generating a difference in temperature with respect to a normal temperature state for either one of the outer cylinder or the inner cylinder;   a cylinder insertion process of inserting the inner cylinder inside the outer cylinder in a state in which the inner cylinder has a smaller outer diameter than an inner diameter of the outer cylinder as a result of the temperature difference generated by the temperature difference generation process;   an elimination process of eliminating the generated temperature difference; and   a plunger placement process of placing a circular tube-shaped plunger in the pressure chamber of the inner cylinder so as to enable reciprocating motion by the plunger.   
     
     
         2 . The method of manufacturing a plunger pump of  claim 1 , wherein:
 the temperature difference generation process includes a heating process of heating the outer cylinder;   in the cylinder insertion process, the inner cylinder is inserted into the outer cylinder in a state in which the inner diameter of the outer cylinder has become larger than the outer diameter of the inner cylinder; and   the elimination process includes a cooling process of cooling the outer cylinder.   
     
     
         3 . The method of manufacturing a plunger pump of  claim 1 , wherein:
 the temperature difference generation process includes a cooling process of cooling the inner cylinder;   in the cylinder insertion process, the inner cylinder is inserted into the outer cylinder in a state in which the outer diameter of the inner cylinder has become smaller than the inner diameter of the outer cylinder; and   the elimination process includes a heating process of heating the inner cylinder.   
     
     
         4 . The method of manufacturing a plunger pump of  claim 1 , wherein:
 the temperature difference generation process includes:
 a heating process of heating the outer cylinder, and 
 a cooling process of cooling the inner cylinder; 
   in the cylinder insertion process, the inner cylinder is inserted into the outer cylinder in a state in which the inner diameter of the outer cylinder has become larger than the outer diameter of the inner cylinder; and   the elimination process includes:
 a cooling process of cooling the outer cylinder, and 
 a heating process of heating the inner cylinder. 
   
     
     
         5 . The method of manufacturing a plunger pump of  claim 2 , wherein the inner cylinder is press-fitted inside the outer cylinder in the cylinder insertion process. 
     
     
         6 . A plunger pump for connection to a pulverizer, the pulverizer including a pulverization flow path through which a preparation is passed in order to pulverize the preparation, and the plunger pump being configured to feed the preparation into the pulverizer under high pressure, the plunger pump comprising:
 an outer cylinder;   an inner cylinder that is inserted inside the outer cylinder and that is formed with a circular tube-shaped internal pressure chamber; and   a circular tube-shaped plunger that is placed in the pressure chamber of the inner cylinder so as to be capable of reciprocating motion,   the inner cylinder being configured so as to be compressed by the outer cylinder.   
     
     
         7 . The method of manufacturing a plunger pump of  claim 3 , wherein the inner cylinder is press-fitted inside the outer cylinder in the cylinder insertion process. 
     
     
         8 . The method of manufacturing a plunger pump of  claim 4 , wherein the inner cylinder is press-fitted inside the outer cylinder in the cylinder insertion process.