Switching valve for flow type analysis apparatus

Patent metadata

Field	Value
Publication number	US-9841406-B2
Application number	US-201414786397-A
Country	US
Kind code	B2
Filing date	Apr 22, 2014
Priority date	Apr 22, 2013
Publication date	Dec 12, 2017
Grant date	Dec 12, 2017

Abstract

A switching valve includes: (A) a rotor including: (1) a center pipe connection port, (2) a first in-valve flow path in communication with the center pipe connection port, and (3) an arc-like second in-valve flow path; (B) a stator including: (4) a first pipe connection port group which is brought into communication independently with the center pipe connection port via the first in-valve flow path when the rotor is turned, and (5) a second pipe connection port group which is brought into mutual communication via the second in-valve flow path when the rotor is turned; and (C) an arrangement of the rotor and the stator satisfying the following relationship: the state of communication or non-communication among the second pipe connection port group via the second in-valve flow path is switched in accordance with the state of communication between the first pipe connection port group and the center pipe connection port.

First claim

The invention claimed is:

1. A switching valve for a flow type analysis apparatus comprising:
(A) a rotor comprising:
(1) at least one center pipe connection port;
(2) at least one first in-valve flow path in communication with the center pipe connection port; and
(3) at least one arc-like second in-valve flow path turning in accordance with turning of the first in-valve flow path and have a flow path length equal to or greater than a distance travelled by one motion of the turning;

(B) a stator comprising:
(4) a first pipe connection port group having at least two pipe connection ports independently and respectively in communication with the center pipe connection port via the first in-valve flow path when the first in-valve flow path of the rotor turns and of which connection positions exist on one circumference around a central axis of the rotor; and
(5) a second pipe connection port group having positions of connection with the arc-like second in-valve flow path on a circumference of a circle coaxial in relation to and having a diameter different from the circumference on which positions of connection between the first in-valve flow path of the rotor and the first pipe connection port group exist, the second pipe connection port group having two or more pipe connection ports that are to be brought into mutual communication when the arc-like second in-valve flow path is turned; and

(C) an arrangement of the rotor and the stator that satisfies the following relationships (6) and (7):
(6) at at least one of the pipe connection ports, of the first pipe connection port group of the stator that is brought into communication independently with the first in-valve flow path of the rotor, when the center pipe connection port and the pipe connection port are brought into mutual communication, at least two mutually adjacent pipe connection ports of the second pipe connection port group are brought into mutual communication via the arc-like second in-valve flow path; and
(7) at the other pipe connection port of the first pipe connection port group, when the center pipe connection port and the pipe connection port are brought into mutual communication, the mutually adjacent pipe connection ports of the second pipe connection port group are not to be brought into mutual communication via the arc-like second in-valve flow path.

2. The switching valve according to claim 1 , wherein the arc-like second in-valve flow path of the rotor has a flow path length greater than a distance travelled by one motion of the turning.

3. The switching valve according to claim 1 ,
wherein the switching valve is an at least one way, at least six port, and at least four position switching valve,
wherein the arc-like second in-valve flow path of the rotor has a flow path length equal to or greater than a distance travelled by two motions of the turning,
wherein the first pipe connection port group of the stator includes four or more pipe connection ports that are independently brought into communication with the center pipe connection port via the first pipe connection port group of the rotor, and
wherein the second pipe connection port group of the stator includes two or more pipe connection ports that are in mutual communication via the arc-like second in-valve flow path of the rotor.

4. The switching valve according to claim 3 , wherein the arc-like second in-valve flow path of the rotor has a flow path length greater than a distance travelled by two motions of the turning.

5. A flow type analysis apparatus including a liquid feed pump, comprising:
a switching valve comprising:
(A) a rotor comprising:
(1) at least one center pipe connection port;
(2) at least one first in-valve flow path in communication with the center pipe connection port; and
(3) at least one arc-like second in-valve flow path turning in accordance with turning of the first in-valve flow path and have a flow path length equal to or greater than a distance travelled by one motion of the turning;

(B) a stator comprising:
(4) a first pipe connection port group having at least two pipe connection ports independently and respectively in communication with the center pipe connection port via the first in-valve flow path when the first in-valve flow path of the rotor turns and of which connection positions exist on one circumference around a central axis of the rotor; and
(5) a second pipe connection port group having positions of connection with the arc-like second in-valve flow path on a circumference of a circle coaxial in relation to and having a diameter different from the circumference on which positions of connection between the first in-valve flow path of the rotor and the first pipe connection port group exist, the second pipe connection port group having two or more pipe connection ports that are to be brought into mutual communication when the arc-like second in-valve flow path is turned; and

(C) an arrangement of the rotor and the stator that satisfies the following relationships (6) and (7):
(6) at at least one of the pipe connection ports, of the first pipe connection port group of the stator that is brought into communication independently with the first in-valve flow path of the rotor, when the center pipe connection port and the pipe connection port are brought into mutual communication, at least two mutually adjacent pipe connection ports of the second pipe connection port group are brought into mutual communication via the arc-like second in-valve flow path; and
(7) at the other pipe connection port of the first pipe connection port group, when the center pipe connection port and the pipe connection port are brought into mutual communication, the mutually adjacent pipe connection ports of the second pipe connection port group are not to be brought into mutual communication via the arc-like second in-valve flow path,
wherein the center pipe connection port of the switching valve is connected to a measuring pump via a pipe, and
wherein at least one of the first pipe connection port group of the switching valve is connected to a cylinder chamber of the liquid feed pump via a pipe.

6. The flow type analysis apparatus according to claim 5 ,
wherein a flow path which is branched from a flow path of the liquid feed pump on a discharge side thereof and in which a carrier liquid is allowed to flow when air bleeding of the liquid feed pump is carried out is connected to at least one of the pipe connection ports of the second pipe connection port group of the switching valve, and
wherein a drain flow path is connected to the other pipe connection port of the second pipe connection port group.

7. An air bleeding method, wherein the air bleeding of the liquid feed pump is carried out by using the flow type analysis apparatus according to claim 5 and by feeding the carrier liquid by performing suction and discharge operations by using the measuring pump.

8. A flow path switching method carried out by the flow type analysis apparatus according to claim 6 ,
wherein when the measuring pump and the cylinder chamber of the liquid feed pump are brought into mutual communication via the first in-valve flow path, the drain flow path and the flow path which is branched from a flow path of the liquid feed pump on the discharge side thereof and in which the carrier liquid is allowed to flow when the air bleeding of the liquid feed pump is carried out are brought into mutual communication via the arc-like second in-valve flow path, and furthermore,
wherein when the first in-valve flow path is turned to be brought into communication with a pipe connection port to which neither the measuring pump nor the cylinder chamber of the liquid feed pump is brought into communication, the drain flow path and

Assignees

• Sekisui Medical Co Ltd

Inventors

• Yotani Takuya
• Taira Hiroaki
• Oka Takayuki
• Muraki Hideki

Classifications

• G01N30/20 Primary

  using a sampling valve · CPC title

• G01N35/1097 Primary

  characterised by the valves (valves in general F16K) · CPC title

• G01N2030/201

  multiport valves, i.e. having more than two ports · CPC title

• G01N2030/202

  rotary valves · CPC title

• G01N2030/207

  with metering cavity, e.g. sample loop · CPC title