JPH044991Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a test device used to check whether a control panel that controls the opening and closing of a main steam isolation valve operates correctly.

[Problem that the invention attempts to solve]

At a nuclear power plant, a main steam isolation valve is installed midway through the piping (main steam line) that transports the steam generated in the reactor to the turbine, and is used to shut off the piping in the unlikely event that an accident occurs during reactor operation. (isolation), and its operations generally include opening, rapid closing (the valve closes in 3 to 5 seconds from the closed position), and test closing (the valve closes in 50 to 60 seconds from the open position). It is divided into three aspects. A control panel is attached to the valve head of the main steam isolation valve to control this operation of the isolation valve, and is generally connected to three switching valves, a four-way valve, a three-way valve, and a two-way valve, and each switching valve. It is equipped with three electromagnetic valves that supply operating pressure to control their operation, and by remotely controlling the electromagnetic valves, the necessary operating pressure is sent to operate each switching valve and cause the isolation valve to perform the desired operation.

Therefore, this control panel must always operate accurately as it controls the main steam isolation valve, which is required to be absolutely leak-free, and even after it is installed on the actual machine, it must be regularly operated. It is necessary to perform maintenance and inspection.

In view of the above circumstances, the present invention provides a testing device that has all the functions necessary for inspecting control panels in one device and can easily handle panels that have a large number of valves and piping. The purpose is to

[Means for solving problems]

In order to achieve the above object, the present invention includes a plurality of switching valves and an electromagnetic valve that controls the operation of the switching valves by supplying a first operating pressure to the switching valves, and the operation of the switching valves causes the main steam to flow. A control panel that controls the operation of the main steam isolation valve by supplying a second operating pressure to the isolation valve is used as a specimen, and an operating current is applied to the solenoid valve in a device body on which the control panel is removably mounted. an electric circuit with an operating switch for supplying the switch, a first pressure circuit supplying the first operating pressure to the switching valve via a solenoid valve, and a second pressure circuit supplying the second operating pressure to the main piping of the control panel. A main steam isolation valve control in which a pressure circuit is installed, a measuring device such as a voltmeter, wattmeter, or pressure gauge is attached to the circuit, and the control panel is operated in a simulated manner to check its operation and the presence or absence of pressure leaks. The panel testing equipment was constructed.

[Effect]

In other words, the test device of the present invention can be used before attaching the control panel to the actual device, or by removing the panel that has been attached to the actual device and placing it on the test device, and connecting the various circuits installed in the device body to the panel. The panel is placed under simulated use conditions. General factory power and factory air are used as the power and pressure sources required for testing. The various circuits connected to the panel are equipped with measuring instruments such as voltmeters, wattmeters, and pressure gauges, and the panel is operated in a simulated manner to check whether it is operating accurately according to specifications.

〔Example〕

Next, embodiments of the present invention will be described.

The drawing schematically depicts a state in which a control panel is mounted on the main body 1 of the test device, and the control panel, which is designated as a whole by reference numeral 33, has a control panel main body 34, a four-way valve 35, a three-way valve 36,
and three switching valves of the two-way valve 37 and three electromagnetic valves 38, 38, 38 for supplying a first operating pressure to each switching valve to control the operation of the switching valve, and the operation of the switching valve The main steam isolation valve is operative to provide a second operating pressure to a main steam isolation valve (not shown) to control operation of the main steam isolation valve. Placement surface 2 of device main body 1
A pedestal 3 having a rubber sheet 4 adhered to the upper surface thereof is installed, and a control panel 33 is removably fixed on this pedestal 3 with bolts 5.

An air inlet 6 that takes in factory air that functions as operating pressure is provided on the side of the device body 1, and one pressure circuit that reaches the air inlet 6 from a factory air source (not shown) via a flexible hose 7 is connected to the device. It branches into two parts within the main body 1, and connects from the pilot air supply port 9 through the copper piping 10 to the solenoid valves 38, 38,
38 and further reaches the drive section of each switching valve 35, 36, 37, and sends a first operating pressure that operates each switching valve 35, 36, 37 under flow control by the solenoid valves 38, 38, 38. a first pressure circuit 8 that supplies a second working pressure; and a second pressure circuit 11 that is led from the main air supply port 12 via a flexible hose 13 to the starting point of the main piping of the control panel body 1 and supplies a second operating pressure. be done. During actual use, this second operating pressure is applied to the main steam isolation valve under the flow control associated with the operation of the switching valves 35, 36, and 37 to achieve the desired operation of the main steam isolation valve. The main piping end point(s) of the panel body 34 is supplied to the isolation valve driving part in order to cause the main piping to occur, but during the test, no connection was made from this end point to the isolation valve. The main piping starts from one starting point connected to the second pressure circuit 11, branches into a number of flow furnaces to be controlled by respective switching valves 35, 36, and 37 within the control panel main body 34, and is connected to a valve section. After passing, it gradually merges and reaches two terminal points. Due to the layout, each flow path is
The panel body 34 is bent at one or more right angles in the middle, and each bent portion is provided with an opening toward the side surface of the panel body 34 for the convenience of drilling. Each opening is normally sealed with a blind lid to complete each flow path. The air discharged from the end point is a collection of air that passes through each flow path and reaches the end point after being controlled by the switching valves 35, 36, and 37, and has only the function of air being discharged from the end point. Therefore, since it is not possible to specify which switching valve 35, 36, 37 caused the air to be sent out, it is difficult to determine whether each switching valve 35, 36, 37 is operating correctly. cannot be confirmed. For this reason, the test device has a control panel main body 34.
The end point of the main pipe opening at the bottom of the main body 34
Instead of this, the blind lids of each channel were removed one by one and air was discharged from an opening in the middle of each channel.
As a result, depending on which opening the air is discharged from, the flow path of the air and the switching valves 35, 3 connected thereto are determined.
6, 37 can be identified, and it is possible to accurately check whether the switching valve to be operated is operating without fail or whether there is any air leakage. An accumulator 1 is included in the pressure circuit within the device body 1.
4 is connected. This accumulator 14 functions as an air tank that makes the pressure of the air supplied to the control panel 33 uniform (constant), and the air in this accumulator 14 that is no longer needed after the test is completed is discharged to the atmosphere from the drain hole 15. This drain hole 15 is provided with a valve that opens and closes the drain hole 15, or as a valve that also has the function of the valve, to limit the internal pressure of the accumulator 14 to a certain value or less to prevent accidents such as explosions. A safety valve 16 is installed to prevent this, and a pressure gauge (not shown) is installed in the pressure circuit in line with the accumulator 14 to measure the pressure of the air flowing through the circuit.

The device body 1 includes an electric circuit 1 that operates the solenoid valves 38, 38, 38 in parallel with the pressure circuits 8, 11.
7 is built in, and a 200V factory power supply is used as the power source (not shown) for the current input to the power input port 19 via the cable 18. When the power switch 20 is turned on, the pilot lamp 21
lights up to indicate this, and the voltmeter 22 accurately displays the input voltage. The electric circuit 17 is branched into three systems in accordance with the number of solenoid valves 38, 38, 38 in the device main body 1, and is divided into three systems depending on the number of solenoid valves 38, 38, 38, respectively.
An operating switch 24 that switches the solenoid valve 38, an indicator lamp 25 that indicates the switching direction, a voltmeter 26 that confirms the minimum operating voltage (attraction voltage and release voltage) of the solenoid valve 38, and a current when the solenoid valve 38 is in the ON state (excited state). Ammeter 27 and output terminal 28 to check
28, and the output terminals 28, 28 are connected to the solenoid valve 38 handled by the system using cables 29, 29.

The main body 1 of the apparatus is movable by four casters 30 and 31 attached to the lower surface thereof, and is designated by reference numeral 3.
Stoppers (not shown) are attached to the two casters indicated by 0. Further, a door 32 for internal inspection is provided on the side surface of the main body 1 of the apparatus.

Set the control panel 33 as described above, and while introducing factory air from the pressure circuits 8 and 11, turn on the power switch 20, and turn on the operation switch 2.
4, 24, 24 and control panel 33
Operate it in a simulated manner to check its operation and check for air leaks. In addition to the three types of operation of the main steam isolation valve, the test pattern can be set arbitrarily to operate one solenoid valve 38, operate two solenoid valves, or operate all of them. Select as appropriate and try all patterns as necessary.

[Effect of idea]

As explained above, the test device of the present invention uses the control panel of the main steam isolation valve as a specimen, which should not malfunction from the perspective of preventing environmental pollution, to accurately check the operation of this panel and the presence or absence of pressure leaks. It is designed to allow for quick setup when starting a test.

[Brief explanation of the drawing]

FIG. 1 is a side view of a testing device according to an embodiment of the present invention with a control panel attached thereto, FIG. 2 is a plan view thereof, and FIG. 3 is a front view thereof. DESCRIPTION OF SYMBOLS 1... Device body, 3... Pedestal, 4... Rubber sheet, 5... Bolt, 6... Air inlet, 8... First pressure circuit, 9... Pilot air supply port, 1
DESCRIPTION OF SYMBOLS 1...Second pressure circuit, 12...Main air supply port, 14...Accumulator, 17...Electric circuit, 19...Power input port, 20...Power switch, 22, 26...Voltmeter, 24 ...Operation switch, 27...Ammeter, 28...Output terminal, 33...
...Control panel, 34...Control panel body, 35...4-way valve, 36...3-way valve, 3
7...2-way valve, 38...Solenoid valve.

Claims (1)

[Scope of utility model registration request] comprising a plurality of switching valves and a solenoid valve that supplies a first operating pressure to the switching valves to control the operation of the switching valves,
A control panel that controls the operation of the main steam isolation valve by supplying a second operating pressure to the main steam isolation valve by the operation of the switching valve is used as a test specimen, and the control panel is removably mounted on the apparatus main body. , an electric circuit with an operation switch that supplies an operating current to the solenoid valve, a first pressure circuit that supplies a first operating pressure to the switching valve via the solenoid valve, and a main pipe of the control panel that is connected to the second A second pressure circuit is provided to supply operating pressure, and a measuring device such as a voltmeter, wattmeter, or pressure gauge is attached to this circuit, and the control panel is operated in a simulated manner to check its operation and whether there is any pressure leakage. A testing device for a control panel for a main steam isolation valve, characterized by inspecting it.