Pumping mechanism, distributing valve thereof and concrete pumping machine

Abstract

A pumping mechanism and the distributing valve thereof and a concrete pumping machine are disclosed. The distributing valve includes a valve casing ( 100 ) and a valve core ( 200 ) located in the pumping chamber of the valve casing. The valve core is rotatably connected to the valve casing, thus forming a main rotating axis (O). The valve casing has a discharge hole ( 103 ) throughout the casing wall, a first suction hole ( 101 ) and a second suction hole ( 102 ). The valve core has a distributing port ( 202 ) and a feed port ( 201 ) communicated with a material container. A pumping channel is formed between the peripheral face of the valve core and the inner wall face of the pumping chamber. The peripheral face of the valve core is provided with two cutting plates ( 210 ) protruding from two sides of the distributing port respectively. The outer side faces of the two cutting plates are rotatably sealedly matched with the sealing face of the valve casing. In a first state, the distributing port is communicated with the first suction hole through the space between the two cutting plates. In a second state, the distributing port is communicated with the second suction hole through the space between the two cutting plates. The distributing valve has a smaller matching area for cutting so as to ensure better sealing performance whilst have higher driving performance.

1 . A distributing valve of a pumping mechanism, comprising a valve casing ( 100 ) and a valve core ( 200 ) located in the pumping chamber of the valve casing ( 100 ), and the valve core ( 200 ) is rotatably connected to the valve casing ( 100 ), thus forming a main rotating axis (O); the valve casing ( 100 ) has a discharge hole ( 103 ) throughout the casing wall, a first suction hole ( 101 ) and a second suction hole ( 102 ); the valve core ( 200 ) has a distributing port ( 202 ) and a feed port ( 201 ) communicated with a material container; a pumping channel is formed between the peripheral face of the valve core ( 200 ) and the inner wall face of the pumping chamber, wherein, the peripheral face of the valve core ( 200 ) is provided with two cutting plates ( 210 ) protruding from two sides of the distributing port ( 202 ) respectively and being parallel to the main rotating axis (O); the outer side faces of the two cutting plates ( 210 ) are rotatably sealedly matched with the sealing face of the valve casing; in a first state, the distributing port ( 202 ) is communicated with the first suction hole ( 101 ) through the space between the two cutting plates ( 210 ); and in a second state, the distributing port ( 202 ) is communicated with the second suction hole ( 102 ) through the space between the two cutting plates ( 210 ). 
     
     
         2 . The distributing valve of a pumping mechanism according to  claim 1 , wherein, the outer side faces of the cutting plates ( 210 ) is arc-shaped surfaces. 
     
     
         3 . The distributing valve of a pumping mechanism according to  claim 1 , wherein, the valve casing ( 100 ) comprises a valve body ( 110 ) and a seal adjustment plate ( 120 ); the seal adjustment plate ( 120 ) can be radially and slideably mounted within the adjustment plate groove ( 111 ) of the valve body ( 110 ), and the inner side face of the seal adjustment plate ( 120 ) at least forms a part of the sealing face of the valve casing ( 100 ); and the valve casing further comprises an adjustment assembly changing the matching gap between the seal adjustment plate ( 120 ) and the cutting plates ( 210 ). 
     
     
         4 . The distributing valve of a pumping mechanism according to  claim 3 , wherein, when the outer side faces of the cutting plates ( 210 ) match the inner side face of the seal adjustment plate ( 120 ), the seal adjustment plate ( 120 ) corresponding to the matching and the cutting plates ( 210 ) extend in one plane. 
     
     
         5 . The distributing valve of a pumping mechanism according to  claim 3 , wherein, the valve casing ( 100 ) comprises three said seal adjustment plates ( 120 ), and the inner side faces of the three seal adjustment plates ( 120 ) form the sealing face; in the first state, the outer side faces of two said cutting plates ( 210 ) are respectively sealedly matched with the inner side face of a first seal adjustment plate ( 121 ) and the inner side face of a second seal adjustment plate ( 122 ), and in the second state, the outer side faces of two said cutting plates ( 210 ) are respectively sealedly matched with the inner side face of the second seal adjustment plate ( 122 ) and the inner side face of a third seal adjustment plate ( 123 ). 
     
     
         6 . The distributing valve of a pumping mechanism according to  claim 3 , wherein, the peripheral face of the upper end portion of the valve core ( 200 ) is in rotating matching with the inner wall face of the upper port of the valve casing ( 100 ); the upper opening of the adjustment plate groove ( 111 ) is located within the upper surface of the valve casing ( 100 ), and the seal adjustment plates ( 120 ) are mounted into the adjustment plate groove ( 111 ) from the upper opening; the upper opening communicates with the upper port of the valve casing ( 100 ), and the thickness of the cutting plates ( 200 ) is not larger than that of the seal adjustment plates ( 120 ). 
     
     
         7 . The distributing valve of a pumping mechanism according to  claim 6 , wherein, the peripheral face of the lower end portion of the valve core ( 200 ) is in rotating matching with the inner wall face of the lower port of the valve casing ( 100 ); and the valve body ( 100 ) is integrally formed. 
     
     
         8 . The distributing valve of a pumping mechanism according to  claim 3 , wherein, the cutting plate ( 210 ) comprises a cutting plate body and a hard alloy sheet fixed on the outer side face of the cutting plate body, and the outer surface of the hard alloy sheet forms the outer side face of the cutting plate ( 210 ); or, the seal adjustment plate ( 120 ) comprises a plate body and a hard alloy sheet fixed at the inner side face of the plate body, and the surface of the hard alloy sheet towards the valve core ( 200 ) forms the inner side face of the seal adjustment plate ( 120 ). 
     
     
         9 . A pumping mechanism, comprising a conveying cylinder, a material container and a distributing valve, and the material container being provided with a discharge port facing downward, wherein, the distributing valve includes a valve casing ( 100 ) and a valve core ( 200 ) located in the pumping chamber of the valve casing ( 100 ), and the valve core ( 200 ) is rotatably connected to the valve casing ( 100 ), thus forming a main rotating axis (O); the valve casing ( 100 ) has a discharge hole ( 103 ) throughout the casing wall, a first suction hole ( 101 ) and a second suction hole ( 102 ); the valve core ( 200 ) has a distributing port ( 202 ) and a feed port ( 201 ) communicated with the discharge port; a pumping channel is formed between the peripheral face of the valve core ( 200 ) and the inner wall face of the pumping chamber, wherein, the peripheral face of the valve core ( 200 ) is provided with two cutting plates ( 210 ) protruding from two sides of the distributing port ( 202 ) respectively and being parallel to the main rotating axis (O); the outer side faces of the two cutting plates ( 210 ) are rotatably sealedly matched with the sealing face of the valve casing; in a first state, the distributing port ( 202 ) is communicated with the first suction hole ( 101 ) through the space between the two cutting plates ( 210 ); and in a second state, the distributing port ( 202 ) is communicated with the second suction hole ( 102 ) through the space between the two cutting plates ( 210 ). 
     
     
         10 . A concrete pumping machine comprising a machine body and a pumping mechanism, wherein, the pumping mechanism is mounted on the machine body and includes a conveying cylinder, a material container and a distributing valve, and the material container being provided with a discharge port facing downward, wherein, the distributing valve includes a valve casing ( 100 ) and a valve core ( 200 ) located in the pumping chamber of the valve casing ( 100 ), and the valve core ( 200 ) is rotatably connected to the valve casing ( 100 ), thus forming a main rotating axis (O); the valve casing ( 100 ) has a discharge hole ( 103 ) throughout the casing wall, a first suction hole ( 101 ) and a second suction hole ( 102 ); the valve core ( 200 ) has a distributing port ( 202 ) and a feed port ( 201 ) communicated with the discharge port; a pumping channel is formed between the peripheral face of the valve core ( 200 ) and the inner wall face of the pumping chamber, wherein, the peripheral face of the valve core ( 200 ) is provided with two cutting plates ( 210 ) protruding from two sides of the distributing port ( 202 ) respectively and being parallel to the main rotating axis (O); the outer side faces of the two cutting plates ( 210 ) are rotatably sealedly matched with the sealing face of the valve casing; in a first state, the distributing port ( 202 ) is communicated with the first suction hole ( 101 ) through the space between the two cutting plates ( 210 ); and in a second state, the distributing port ( 202 ) is communicated with the second suction hole ( 102 ) through the space between the two cutting plates ( 210 ). 
     
     
         11 . The pumping mechanism of  claim 9 , wherein, the outer side faces of the cutting plates ( 210 ) are arc-shaped surfaces. 
     
     
         12 . The pumping mechanism of  claim 9 , wherein, the valve casing ( 100 ) comprises a valve body ( 110 ) and a seal adjustment plate ( 120 ); the seal adjustment plate ( 120 ) can be radially and slideably mounted within the adjustment plate groove ( 111 ) of the valve body ( 110 ), and the inner side face of the seal adjustment plate ( 120 ) at least forms a part of the sealing face of the valve casing ( 100 ); and the valve casing further comprises an adjustment assembly changing the matching gap between the seal adjustment plate ( 120 ) and the cutting plates ( 210 ). 
     
     
         13 . The pumping mechanism of  claim 12 , wherein, when the outer side faces of the cutting plates ( 210 ) match the inner side face of the seal adjustment plate ( 120 ), the seal adjustment plate ( 120 ) corresponding to the matching and the cutting plates ( 210 ) extend in one plane. 
     
     
         14 . The pumping mechanism of  claim 12 , wherein, the valve casing ( 100 ) comprises three said seal adjustment plates ( 120 ), and the inner side faces of the three seal adjustment plates ( 120 ) form the sealing face; in the first state, the outer side faces of two said cutting plates ( 210 ) are respectively sealedly matched with the inner side face of a first seal adjustment plate ( 121 ) and the inner side face of a second seal adjustment plate ( 122 ), and in the second state, the outer side faces of two said cutting plates ( 210 ) are respectively sealedly matched with the inner side face of the second seal adjustment plate ( 122 ) and the inner side face of a third seal adjustment plate ( 123 ). 
     
     
         15 . The pumping mechanism of  claim 12 , wherein, the peripheral face of the upper end portion of the valve core ( 200 ) is in rotating matching with the inner wall face of the upper port of the valve casing ( 100 ); the upper opening of the adjustment plate groove ( 111 ) is located within the upper surface of the valve casing ( 100 ), and the seal adjustment plates ( 120 ) are mounted into the adjustment plate groove ( 111 ) from the upper opening; the upper opening communicates with the upper port of the valve casing ( 100 ), and the thickness of the cutting plates ( 200 ) is not larger than that of the seal adjustment plates ( 120 ). 
     
     
         16 . The pumping mechanism of  claim 15 , wherein, the peripheral face of the lower end portion of the valve core ( 200 ) is in rotating matching with the inner wall face of the lower port of the valve casing ( 100 ); and the valve body ( 100 ) is integrally formed. 
     
     
         17 . The pumping mechanism of  claim 12 , wherein, the cutting plate ( 210 ) comprises a cutting plate body and a hard alloy sheet fixed on the outer side face of the cutting plate body, and the outer surface of the hard alloy sheet forms the outer side face of the cutting plate ( 210 ); or, the seal adjustment plate ( 120 ) comprises a plate body and a hard alloy sheet fixed at the inner side face of the plate body, and the surface of the hard alloy sheet towards the valve core ( 200 ) forms the inner side face of the seal adjustment plate ( 120 ). 
     
     
         18 . The concrete pumping machine of  claim 10 , wherein, the outer side faces of the cutting plates ( 210 ) are arc-shaped surfaces. 
     
     
         19 . The concrete pumping machine of  claim 10 , wherein, the valve casing ( 100 ) comprises a valve body ( 110 ) and a seal adjustment plate ( 120 ); the seal adjustment plate ( 120 ) can be radially and slideably mounted within the adjustment plate groove ( 111 ) of the valve body ( 110 ), and the inner side face of the seal adjustment plate ( 120 ) at least forms a part of the sealing face of the valve casing ( 100 ); and the valve casing further comprises an adjustment assembly changing the matching gap between the seal adjustment plate ( 120 ) and the cutting plates ( 210 ). 
     
     
         20 . The concrete pumping machine of  claim 19 , wherein, when the outer side faces of the cutting plates ( 210 ) match the inner side face of the seal adjustment plate ( 120 ), the seal adjustment plate ( 120 ) corresponding to the matching and the cutting plates ( 210 ) extend in one plane.