EXAMINATION AND TEST SYSTEM FOR NUCLEAR-GRADE CONTROL VALVE

• US 20180090235A1
• Filed: 09/26/2016
• Published: 03/29/2018
• Est. Priority Date: 09/26/2016
• Status: Active Grant

• Current Assignee: Institute Of Nuclear Energy Research Atomic Energy Council Executive Yuan
• Original Assignee: Institute Of Nuclear Energy Research Atomic Energy Council Executive Yuan
• Inventors: KO, HSUEH-CHAO, OU YANG, CHII-NENG, LEE, YAO-MIN, YU, CHENG-JUNG
• Granted Patent: US 10,460,846 B2
• Time in Patent Office: Days
• CPC Class Codes: F16K 1/00 Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces in combination with sliding valves F16K3/246, F16K3/267 ; diaphragm valves F16K7/00
• CPC Class Codes: F16K 31/1262 one side of the diaphragm being spring loaded
• CPC Class Codes: F16K 37/0008 Mechanical means F16K37/0075 takes precedence
• CPC Class Codes: F16K 37/0016 having a graduated scale
• CPC Class Codes: F16K 37/0083 by measuring valve parameters
• CPC Class Codes: G21C 17/00 Monitoring; Testing measuring in general G01; Maintaining
• CPC Class Codes: Y02E 30/30 Nuclear fission reactors

Abstract

An examination and test system for nuclear-grade control valve is provided and includes a hermetically sealed chamber, a base, a guide unit, a winder, a steel cable, and a length measurement device. The hermetically sealed chamber includes a chamber for accommodating a control valve. The base is disposed outside the hermetically sealed chamber. The guide unit is disposed on at least one of the control valve and the base. The winder and the length measurement device are disposed on the base. The steel cable connects with a valve rod of the control valve and extends out of the hermetically sealed chamber to connect with the winder. The steel cable is wound on the guide unit, wound up by the winder, and thus rendered taut at any time. The length measurement device has a measurement element coupled to the steel cable and displays the displacement of the measurement element.

Claims

1. An examination and test system for nuclear-grade control valve, used for examining and testing a control valve, said control valve comprising a valve base, a valve rod, and a driving unit, said valve base including a communicating opening therein, said valve rod including a valve plug capable of closing said communication opening, said valve rod being movable by said driving unit, said valve plug blocking said communicating opening and forming openness of various degrees according to the traveling distance of said valve rod, and comprising:

a hermetically sealed chamber, including a chamber with controllable ambient conditions including at least one of temperature, pressure and humidity, and said chamber used for accommodating said control valve;

a base, disposed outside said hermetically sealed chamber;

a guide unit, disposed on at least one of said control valve and said base;

a winder, disposed on said base;

a steel cable, connected with said valve rod at one end and extending out of said hermetically sealed chamber to connect with said winder at the other end, wound on said guide unit, wound up by said winder, and rendered taut at any time; and

a length measurement device, disposed on said base, and including a body and a measurement element, said measurement element movable with respect to said body and coupled to said steel cable, and said length measurement device displaying the displacement of said measurement element relative to said body.

2. The examination and test system for nuclear-grade control valve of claim 1, wherein said length measurement device is a dial gauge or a digital vernier caliper.

3. The examination and test system for nuclear-grade control valve of claim 2, wherein said control valve includes a positioning member;

said positioning member includes a feedback lever;

said feedback lever includes a guiding hole;

said valve rod includes a positioning pillar disposed in said guiding hole; and

one end of said steel cable is fixed to said positioning pillar or said feedback lever.

4. The examination and test system for nuclear-grade control valve of claim 1, wherein said hermetically sealed chamber includes a hole on the sidewall;

an elastic hermetical plug is plugged to said hole; and

said steel cable passes through said elastic hermetical plug and extends out of said hermetically sealed chamber.

5. The examination and test system for nuclear-grade control valve of claim 4, wherein said length measurement device is a dial gauge or a digital vernier caliper.

6. The examination and test system for nuclear-grade control valve of claim 5, wherein said control valve includes a positioning member;

said positioning member includes a feedback lever;

said feedback lever includes a guiding hole;

said valve rod includes a positioning pillar disposed in said guiding hole; and

one end of said steel cable is fixed to said positioning pillar or said feedback lever.

7. The examination and test system for nuclear-grade control valve of claim 4, wherein said elastic hermetical plug is cone-shaped.

8. The examination and test system for nuclear-grade control valve of claim 7, wherein said length measurement device is a dial gauge or a digital vernier caliper.

9. The examination and test system for nuclear-grade control valve of claim 8, wherein said control valve includes a positioning member;

said positioning member includes a feedback lever;

said feedback lever includes a guiding hole;

said valve rod includes a positioning pillar disposed in said guiding hole; and

one end of said steel cable is fixed to said positioning pillar or said feedback lever.

10. The examination and test system for nuclear-grade control valve of claim 7, wherein the material of said elastic hermetical plug is silica gel or rubber.

11. The examination and test system for nuclear-grade control valve of claim 10, wherein said length measurement device is a dial gauge or a digital vernier caliper.

12. The examination and test system for nuclear-grade control valve of claim 11, wherein said control valve includes a positioning member;

said positioning member includes a feedback lever;

said feedback lever includes a guiding hole;

said valve rod includes a positioning pillar disposed in said guiding hole; and

one end of said steel cable is fixed to said positioning pillar or said feedback lever.