Pump device and valve module

Abstract

A pump device includes a pump head and a device main body part. The pump head includes: a valve module having a guide holding suction and discharge valves and having a side flow path allowing communicating with an outer lateral surface; a first block including a first accommodation chamber accommodating a valve module lower part, a suction port, a suction-side flow path connecting the suction port and valve, a pump chamber, and a pump chamber communication flow path connecting the pump chamber to the side flow path; a second block including a second accommodation chamber accommodating a valve module upper part, a discharge port, and a discharge-side flow path connecting the discharge port to a discharge valve upper part; and a coupling device for coupling the blocks. The device main body part includes a diaphragm in the first block pump chamber and an actuator driving the diaphragm to reciprocate.

1 . A pump device comprising:
 a pump head; and   a device main body part to which the pump head is to be detachably attached, wherein   the pump head includes:
 a valve module including a suction valve, a discharge valve, and a module guide that integrally holds the suction valve and the discharge valve while the suction valve is located at a lower side and the discharge valve is located at an upper side so as to transport a transport fluid from the lower side to the upper side and that has a side flow path allowing an inter-valve flow path formed between the suction valve and the discharge valve to communicate with an outer lateral surface; 
 a first block including a first accommodation chamber accommodating a lower part of the valve module, a suction port through which the transport fluid is suctioned, a suction-side flow path that connects the suction port to a lower part of the suction valve, a pump chamber of which an upper part is positioned below the side flow path of the valve module, and a pump chamber communication flow path that connects the pump chamber to the side flow path of the valve module; 
 a second block including a second accommodation chamber accommodating an upper part of the valve module, a discharge port through which the transport fluid is discharged, and a discharge-side flow path that connects the discharge port to an upper part of the discharge valve; and 
 coupling means for coupling the first block and the second block together, while the valve module is accommodated inside, and 
   the device main body part includes a diaphragm accommodated in the pump chamber of the first block and an actuator that drives the diaphragm to reciprocate.   
     
     
         2 . The pump device according to  claim 1 , comprising:
 a plurality of valve modules each being the valve module; a plurality of first accommodation chambers each being the first accommodation chamber and a plurality of second accommodation chambers each being the second accommodation chamber accommodating the plurality of valve modules; and a plurality of pump chambers each being the pump chamber, a plurality of diaphragms each being the diaphragm, and a plurality of actuators each being the actuator corresponding to the plurality of valve modules, wherein   the plurality of valve modules are arranged along a horizontal direction,   the suction port is formed in a lateral surface of the first block,   the suction-side flow path includes a first suction-side flow path extending horizontally and communicating with the suction port and a plurality of second suction-side flow paths that allow the first suction-side flow path to vertically communicate with the plurality of first accommodation chambers,   the discharge port is formed in a lateral surface of the second block,   the discharge-side flow path includes a first discharge-side flow path extending horizontally and communicating with the discharge port and a plurality of second discharge-side flow paths that allow the first discharge-side flow path to vertically communicate with the plurality of second accommodation chambers, and   the actuators drive the plurality of diaphragms individually in a phase shifted manner.   
     
     
         3 . The pump device according to  claim 1 , comprising:
 a plurality of valve modules each being the valve module; a plurality of first accommodation chambers each being the first accommodation chamber and a plurality of second accommodation chambers each being the second accommodation chamber accommodating the plurality of valve modules; and a plurality of pump chambers each being the pump chamber, a plurality of diaphragms each being the diaphragm, and a plurality of actuators each being the actuator corresponding to the plurality of valve modules, wherein   the plurality of valve modules are arranged along a horizontal direction,   the suction port is formed in a lateral surface of the first block,   the suction-side flow path includes a first suction-side flow path extending horizontally and communicating with the suction port and a plurality of second suction-side flow paths that allow the first suction-side flow path to vertically communicate with the plurality of first accommodation chambers,   the discharge port is formed in an upper surface of the second block,   the discharge-side flow path is provided so as to allow the discharge port to diagonally communicate with each of the plurality of second accommodation chambers, and   the actuators drive the plurality of diaphragms individually in a phase shifted manner.   
     
     
         4 . The pump device according to  claim 1 , wherein
 the valve module includes a gasket that is provided in an integral manner with the module guide at a lower end of the module guide,   the module guide is formed to have a shape of a stepped circular cylinder including: a first guide part that is to be fitted in the first accommodation chamber and is positioned on the suction valve side; and a second guide part that is to be fitted in the second accommodation chamber, is positioned on the discharge valve side, and has a smaller diameter than an outside diameter of the first guide part, and   a sealing member is provided between an upper end of the first guide part and the second block.   
     
     
         5 . The pump device according to  claim 4 , wherein
 the gasket has a circular cylindrical part and a flange part that sticks out from a lower end of the circular cylindrical part outwardly in a horizontal direction,   the circular cylindrical part is attached to an inner circumferential side of the module guide, and   the flange part is positioned along a lower end part of the module guide.   
     
     
         6 . The pump device according to  claim 4 , wherein
 the module guide includes a plurality of side flow paths each being the side flow path and a guide flow path structured with an annular groove that is formed in an outer circumferential part of the first guide part and that keeps the plurality of side flow paths in communication with one another.   
     
     
         7 . The pump device according to  claim 1 , wherein
 the pump chamber is provided on a lateral surface of the first block, and   the actuator drives the diaphragm to reciprocate in horizontal direction.   
     
     
         8 . The pump device according to  claim 1 , wherein
 the pump chamber is provided on a lower surface of the first block, and   the actuator is provided in a position below the valve module and drives the diaphragm to reciprocate in vertical direction.   
     
     
         9 . The pump device according to  claim 8 , comprising:
 a plurality of valve modules each being the valve module; a plurality of first accommodation chambers each being the first accommodation chamber and a plurality of second accommodation chambers each being the second accommodation chamber accommodating the plurality of valve modules; and a plurality of pump chambers each being the pump chamber, a plurality of pump chamber communication flow paths each being the pump chamber communication flow path, a plurality of diaphragms each being the diaphragm, and a plurality of actuators each being the actuator corresponding to the plurality of valve modules, wherein   the plurality of valve modules are arranged along a horizontal direction, and   the plurality of actuators are arranged along a horizontal direction intersecting the arrangement direction of the valve modules, in such a manner that the plurality of valve modules are interposed therebetween when being viewed in a vertical direction.   
     
     
         10 . A valve module comprising:
 a suction valve;   a discharge valve; and   a module guide that integrally holds the suction valve and the discharge valve, while the suction valve is positioned on a transport fluid suction side, whereas the discharge valve is positioned on a transport fluid discharge side, wherein   the module guide is formed to have a shape of a stepped circular cylinder including: a first guide part that has a first outside diameter and is positioned on the suction valve side; and a second guide part that has a second outside diameter smaller than the first outside diameter and is positioned on the discharge valve side,   the module guide includes an inter-valve flow path provided between the suction valve and the discharge valve and a side flow path that connects the inter-valve flow path to an outer lateral surface of the first guide part, and   the side flow path communicates with the pump chamber, when the valve module is attached to a pump head.   
     
     
         11 . The valve module according to  claim 10 , further comprising: a gasket provided on the transport fluid suction side of the module guide, wherein
 the gasket has a circular cylindrical part and a flange part that sticks out from one end of the circular cylindrical part outwardly in a radial direction,   the circular cylindrical part is attached to an inner circumferential side of the module guide, and   the flange part is positioned along a suction-side end part of the module guide.   
     
     
         12 . The valve module according to  claim 10 , wherein
 the module guide includes a plurality of side flow paths each being the side flow path and a guide flow path structured with an annular groove that is formed in an outer circumferential part of the first guide part and that keeps the plurality of side flow paths in communication with one another.   
     
     
         13 . The valve module according to  claim 11 , wherein
 the suction valve is held by the module guide via a valve holder.   
     
     
         14 . The valve module according to  claim 10 , wherein
 the suction valve and the discharge valve are each structured by using one of a ball valve, an umbrella-type valve, and a poppet valve.