Proportional valve body, proportional valve and manufacturing method for proportional valve body

Abstract

The present disclosure discloses a proportional valve body, a proportional valve and a manufacturing method for a proportional valve body. The proportional valve body comprises a body extending in an axial direction, the body being provided with a first cavity and a second cavity penetrating therethrough in the axial direction and isolated from each other; the body being further provided with a first through hole penetrating through an outer wall of the body, the first hole being communicated with the first cavity and isolated from the second cavity. In the present disclosure, the first cavity and the second cavity of the proportional valve body penetrate through the body in the axial direction, thus the general structure of the proportional valve body can be obtained by means of extrusion molding. Extrusion molding has the advantages of easy operation, high productivity, and high utilization ratio of raw materials. And the proportional valve body obtained by means of extrusion molding has favorable structural and mechanical properties.

What is claimed is: 
     
         1 . A proportional valve body, comprising a body extending in an axial direction, the body being provided with a first cavity and a second cavity penetrating therethrough in the axial direction and isolated from each other; the body being further provided with a first through hole penetrating through an outer wall of the body, the first hole being communicated with the first cavity and isolated from the second cavity. 
     
     
         2 . The proportional valve body according to  claim 1 , further comprising a second through hole penetrating through the outer wall of the body, the second hole being communicated with the second cavity and isolated from the first cavity. 
     
     
         3 . The proportional valve body according to  claim 1 , wherein the body comprises two ends opposite to each other in the axial direction; a first groove being formed at one end of the body and communicated with the first cavity and the second cavity, respectively. 
     
     
         4 . The proportional valve body according to  claim 3 , wherein a second groove surrounding the first cavity or the second cavity is formed at the other end of the body. 
     
     
         5 . The proportional valve body according to  claim 2 , wherein the first through hole is provided on an outer wall at one side of the body, and the second through hole is provided on an outer wall at the other side of the body. 
     
     
         6 . The proportional valve body according to  claim 1 , wherein the first cavity or the second cavity is located at a center of the body. 
     
     
         7 . The proportional valve body according to  claim 1 , wherein the body is further provided with a third cavity penetrating therethrough in the axial direction and isolated from the first cavity and the second cavity. 
     
     
         8 . A proportional valve, comprising:
 a proportional valve body comprising a body extending in an axial direction, the body being provided with a first cavity and a second cavity penetrating therethrough in the axial direction and isolated from each other; the body being further provided with a first through hole penetrating through an outer wall of the body, the first through hole being communicated with the first cavity and isolated from the second cavity;   a spool assembled to the first cavity or the second cavity; the spool comprising a blocking element provided at one end of the first cavity or the second cavity, an adjusting element connected to the blocking element, and an electromagnet used in cooperation with the adjusting element so as to achieve an adjustment function;   a first sealing element provided at one end of the proportional valve body, and in a sealed connection therewith;   a second sealing element provided at the other end of the proportional valve body, and in a sealed connection therewith; and   a second through hole communicated with the second cavity and isolated from the first cavity.   
     
     
         9 . The proportional valve according to  claim 8 , wherein the second through hole is formed on the body and penetrates through the outer wall of the body. 
     
     
         10 . The proportional valve according to  claim 9 , wherein the proportional valve further comprises a stop valve having an outlet end;
 wherein if the spool is assembled to the first cavity, the outlet end of the stop valve is communicated with the first through hole; or,   if the spool is assembled to the second cavity, the outlet end of the stop valve is communicated with the second through hole.   
     
     
         11 . The proportional valve according to  claim 8 , wherein a fourth cavity is formed by the first sealing element and the proportional valve body, the fourth cavity being communicated with the first cavity and the second cavity, and the blocking element being arranged in the fourth cavity. 
     
     
         12 . The proportional valve according to  claim 8 , wherein the first cavity or the second cavity is located at a center of the proportional valve body. 
     
     
         13 . The proportional valve according to  claim 8 , wherein the proportional valve body is provided with a third cavity penetrating therethrough in the axial direction and isolated from the first cavity and the second cavity. 
     
     
         14 . The proportional valve according to  claim 8 , wherein one end of the body is provided with a first groove, in which the blocking element is arranged. 
     
     
         15 . The proportional valve according to  claim 14 , wherein the other end of the body is provided with a second groove, and the adjusting element comprising a membrane provided at the second groove for sealing the first cavity or the second cavity. 
     
     
         16 . The proportional valve according to  claim 8 , wherein the second through hole is formed on the first sealing element or the second sealing element. 
     
     
         17 . A manufacturing method of a proportional valve body, comprising the steps of:
 extruding a raw material into a section bar of a predetermined shape extending in an axial direction;   the section bar of the predetermined shape having a first cavity and a second cavity penetrating therethrough in the axial direction and isolated from each other;   cutting the section bar of the predetermined shape based on predetermined dimensions; and   providing an outer wall of the section bar with a first through hole communicated with the first cavity and isolated from the second cavity.   
     
     
         18 . The manufacturing method of the proportional valve body according to  claim 17 , further comprising providing an outer wall of the section bar with a second through hole communicated with the second cavity and isolated from the first cavity. 
     
     
         19 . The manufacturing method of the proportional valve body according to  claim 17 , wherein the section bar comprises two ends opposite to each other in the axial direction; a first groove being formed at one end of the section bar, and communicated with the first cavity and the second cavity, respectively. 
     
     
         20 . The manufacturing method of the proportional valve body according to  claim 19 , further comprising forming a second groove at the other end of the first cavity or the second cavity of the section bar, for mounting a membrane. 
     
     
         21 . The manufacturing method of the proportional valve body according to  claim 18 , wherein the first through hole is provided on an outer wall at one side of the section bar, and the second through hole is provided on an outer wall at the other side of the section bar. 
     
     
         22 . The manufacturing method of the proportional valve body according to  claim 17 , wherein the section bar further comprises a third cavity penetrating therethrough in the axial direction and isolated from the first cavity and the second cavity.