KR200394630Y1 - Apparatus for Testing Motor-Operated Valve - Google Patents

Abstract

The present invention relates to an electric valve test equipment.

The present invention includes a power switch, a power lamp, a closing lamp, an opening lamp and an ammeter, but in an electric valve test equipment for testing an electric valve in the field, the open button selection signal or the close button selection signal for driving the motor is received. A field operation switch for inputting a command to open or close the electric valve; An open button switch for additionally moving the electric valve in the open direction when the opening degree of the electric valve does not reach the 100% open position in the state where the open button selection signal is received; And a closing button switch for additionally moving the electric valve in the closing direction when the opening degree of the electric valve does not reach the 0% closed position in the state where the closing button selection signal is received. Provide valve testing equipment.

According to the present invention, it is possible to test the electric valve immediately after completion of the disassembly inspection and maintenance of the electric valve, which eliminates the need for a separate commissioning process, thereby reducing the working time and overall construction period.

Description

Electric Valve Testing Equipment {Apparatus for Testing Motor-Operated Valve}

The present invention relates to an electric valve test equipment. More specifically, when the opening operation of the electric valve is performed during the test of the electric valve, the opening operation of the electric valve is not performed until the 100% open position, or when the closing operation of the electric valve is performed, If the closing operation is not performed, the electric valve is further operated in the open or closed direction by using the close button switch and the open button switch to adjust the position of the electric valve to the 100% open position and the 0% closed position. It relates to test equipment.

Among the valves used for industrial use, POV (Power Operated Valve) is a representative valve that can be controlled automatically or remotely. Of these, the electric valve, one of the active parts of the power plant, contributes to securing the safety of the power plant as much as any other active component. Electric valves perform functions such as isolation of the system, formation of flow paths and sealing of containment vessels during the normal or abnormal operation of the power plant, especially in the event of design reference accidents, to restore the power plant to a safe shutdown state and to maintain the safety shutdown. It plays an essential role in ensuring the safety of power plants.

In general, when operating an electric valve driven by a motor, an on-site low pressure breaker-based circuit breaker is supplied to supply electric power to the electric valve, and the driver checks a system for remote control of the central control room and an operation signal of a pump to be started. After that, the pump is controlled from the central control room according to the remote control (Remote Control) to open and close the electric valve, and accordingly the checking of the open or closed operation state of the electric valve is the most common method of operating the electric valve.

On the other hand, the conventional method of testing a motorized valve manually opens / closes the motorized valve to set the open / closed position of the motorized valve as the operating point of a limit switch. Subsequently, the electric valve is placed in the intermediate position by manual operation and operated by the motor in the open (or closed) direction of the electric valve to confirm the rotational direction and the operating state of the electric valve. It is common to check the limit switch operating state in accordance with the opening (or closing) operation of the electric valve while checking the operating state of the electric valve.

However, as described above, since the operation test is performed by manually operating the valve handle, additional personnel such as a power inspector, a field inspector, and a valve inspector must be arranged, resulting in an increase in labor costs.

There is also a need to operate the valve handle approximately 800 turns when opening and closing the valve manually (400 turns each for open / close operation of the valve). As a result, the opening and closing operation time of each valve is about 1 hour, and when the number of maintenance targets of the electric valve is large, the working time is excessive, resulting in an increase in the preventive maintenance work period.

In the conventional electric valve test, the opening / closing operation state of the electric valve can be confirmed through the remote control of the central control room. Therefore, the operation test of the electric valve is possible only when the remote control system of the central control room is functioning normally. Therefore, it is impossible to test the electric valve immediately even after disassembly inspection and maintenance of the electric valve during the preventive maintenance work.

This results in a situation where the normal operation test (about 100 or more) of the electric valves must be simultaneously performed for a short period of time at the end of the preventive maintenance work, which causes difficulties in securing the quality of the electric valves and delays in commissioning.

In addition, the final stage of preventive maintenance work is the commissioning of alarm test and interlock test of various equipments in conjunction with the electric valve test process.If the electric valve fails during the trial operation of the unit, emergency check and maintenance should be performed again. As a result, the work takes additional time or the trial run time is delayed.

In order to solve this problem, the present invention, when performing the opening operation of the electric valve during the test of the electric valve, the opening operation of the electric valve is not performed until the 100% open position, or 0% when performing the closing operation of the electric valve If the closing action of the motorized valve is not performed until the closed position, the motorized valve is further moved in the open or closed direction by using the close button switch and the open button switch, so that the electric valve is closed to the 100% open position and the 0% closed position. The purpose is to provide a motorized valve test equipment for adjusting the position.

In order to achieve this object, the present invention includes a power switch, a power lamp, a closing lamp, an opening lamp and an ammeter, but in an electric valve test equipment for testing an electric valve in the field, an open button selection signal for driving a motor or A field operation switch configured to receive a close button selection signal and input a command to open or close the electric valve; An open button switch for additionally moving the electric valve in the open direction when the opening degree of the electric valve does not reach the 100% open position in the state where the open button selection signal is received; And a closing button switch for additionally moving the electric valve in the closing direction when the opening degree of the electric valve does not reach the 0% closed position in the state where the closing button selection signal is received. Provide valve testing equipment.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related known configuration or function may obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a view schematically showing a connection state of the electric valve test equipment, the driving power source and the electric valve according to an embodiment of the present invention.

When the electric valve 120 is tested, first, the electric valve 120 which is a test target and the electric valve test equipment 100 are connected, and the supply power is connected to the power cable of the electric valve test equipment 100. If the power supply of the electric valve test equipment 100 is the same as the power supply capacity of the electric valve 120, the power supply line may be disconnected from anywhere in the field and connected to the power cable of the electric valve test equipment 100.

As shown in FIG. 1, the electric valve 120 includes an electric valve test equipment 100, an electric valve 120, a driving power source 110, and an on-site operation switch 130.

Electric valve test equipment 100 according to a preferred embodiment of the present invention is the open button switch 101, the closed button switch 102, the power indicator lamp 103, the power switch 104, the open lamp 105, the closed Lamp 106, defective lamp 107 and ammeter 108.

The open button switch 101 is operated when the open limit switch is less than 100% because the electric valve 120 does not reach the 100% open position when the field operation switch 130 is opened. It is a switch used to further advance the electric valve 120 in the open direction to prevent the motor valve 120 and to reach the 100% open position.

When the close button switch 102 does not reach the 0% closed position when the field operation switch 130 is closed, the close limit switch is operated at a position of 0% or more so that the electric valve 120 is turned off. A switch used to further advance the motorized valve 120 in the closed direction to reach the% closed position.

Here, open limit switch and close limit switch is a kind of automatic switch and it is used to check the mechanical movement to stop the operation or give a separate command.The machine operates on to the set limit and reaches the limit. It is an on / off switch that turns off.

The above-described open limit switch sets the maximum opening degree of the electric valve 120 as the limit of the open limit switch when the electric valve 120 is operated by pressing the open push button of the field operation switch 130. It will be operated to the open limit point of), and to be turned off from above the open limit point of the electric valve 120.

Therefore, when the electric valve 120 is operated by the field operation switch 130 to open, when the electric valve 120 does not reach the 100% open position, the open limit switch that recognizes a point of less than 100% is 100 The point less than% is set to the opening threshold of the electric valve 120 is operated. In this case, the open button switch 101 is a switch used to further advance in the opening direction to reach the 100% open position of the electric valve 120 above the set opening threshold. The close button switch 102 is the reverse.

The power indicator lamp 103 is turned on when the supply power (480 V) is supplied from the driving power source 110. If the power supply lamp 103 is the same as the power supply capacity of the electric valve 120, the electric power valve test equipment is separated by disconnecting the electric wire anywhere in the field. When connected to the 100, the power indicator lamp 103 is turned on, and the power switch 104 functions to turn on / off the power supplied from the external driving power 110.

The open lamp 105 is turned on when the open push button of the field operation switch 130 connected to the electric valve test equipment 100 is pressed, and the close lamp 106 is connected to the electric valve test equipment 100. When the closed push button of the field operation switch 130 is pressed, the defect lamp 107 means a lamp that is turned on when the thermal relay operates.

The ammeter 108 instructs the operating current when the electric motor of the electric valve 120 is operated.

Motor operated valve (Motor Operated Valve) 120 according to a preferred embodiment of the present invention refers to a valve for operating the opening and closing or adjusting the flow rate of the valve by the combination motor and the valve body, it is possible to open and close the valve reliably and quickly In addition, since installation cost and maintenance cost of a valve are comparatively low, it is widely employ | adopted as a remote operated valve.

The driving power source 110 according to the preferred embodiment of the present invention is a 480 V power supply to the electric valve test equipment 100 by disconnecting the motor power cable of the electric valve 120 and connecting to the power cable of the electric valve testing equipment 100. To be supplied.

Field operation switch 130 according to a preferred embodiment of the present invention is made of a pendant switch can be connected to the electric valve test equipment 100 using a cable, it is switched in accordance with the operator's operation. The on-site operation switch 130 is provided to push buttons such as open and closed to drive a motor, and to an electronic contactor and a push button to protect and control the load by driving / stopping a load such as a motor or a gear box according to the switching of the push button. It is configured to include a substrate for separating power to lower the applied voltage. In addition, the field operation switch 130 is used when operating a crane or a hoist, etc., the electric valve 120 while checking the open and closed operation state of the electric valve 120 according to the operation of the open push button, the closed push button Control is possible.

Briefly describing the operation of the electric valve test equipment 100 according to the embodiment of the present invention.

The power switch 104 of the electric valve test equipment 100 is turned on. When the opening test of the electric valve 120 is performed, when the open push button of the field operation switch 130 is pressed, the electric valve 120 is operated in the open direction, and the open limit switch is operated to open the lamp. Lights up. At this time, check and confirm whether the operating point of the open limit switch and the 100% open position of the electric valve 120 match.

If the open position of the electric valve 120 does not reach 100%, the position setting of the electric valve 120 should be adjusted. The method for adjusting the position setting of the electric valve 120 is, while pressing the field operation switch 130, further advances the electric valve 120 in the opening direction until the open button switch 101 is reached. ) To perform the adjustment while confirming the position of the electric valve (120).

When the closing test of the electric valve 120 is performed, when the close push button of the field operation switch 130 is pressed, the electric valve 120 operates in the close direction, and the close limit switch operates to close the lamp. Lights up. At this time, check and confirm whether the operating point of the close limit switch and the 0% closed position of the electric valve 120 match.

If the closed position of the electric valve 120 reaches 0% or more, the position setting of the electric valve 120 should be adjusted. As a method of adjusting the position setting of the electric valve 120, while the field operation switch 130 is pressed, the electric valve 120 is further moved in the closing direction until the 0% closed position is reached. If adjustment is performed while checking the position of the electric valve 120 by operating), the closing test of the electric valve 120 and the adjustment of the close limit switch are completed.

When the thermoelectric relay operates due to the overcurrent flow of the electric valve during the electric valve test, the defect indication lamp is turned on. Therefore, it is preferable to perform the test after comprehensively rechecking the connection state between the electric valve body and the electric valve test equipment 100. Do.

2 is a view showing the internal circuit of the electric valve test equipment according to a preferred embodiment of the present invention.

When the electric valve 120 is opened, an internal circuit operation process of the electric valve test equipment 100 will be described as follows.

As shown in FIG. 2, when the Open switch is selected while the AX1 contact is off, AX1-b, MC1-b, 49X-b, and TH-OL are turned on in turn, and MC1. The contact of is turned on and the motor rotates in the open direction. Then, the Full Open Limit (LS-2) switch is operated to turn on the contact of the AX2 relay, and the AX2-b contact. The contacts of Open and MC1 relays are off and the motor stops.

When the electric valve 120 is closed, an internal circuit operation process of the electric valve test equipment 100 will be described.

As shown in FIG. 2, when the Close switch is selected while the AX2 contact is turned off, AX2-b, MC1-b, 49X-b, and TH-OL are conducted in turn, and the contact of MC2 is turned on. On, the motor rotates in the close direction. Then, the Full Close Limit (LS-6) switch operates to turn on the contact of the AX2 relay and open the AX2-b contact. ) And MC2 relay contacts are off and the motor stops.

After confirming that the open / close position of the electric valve 120 is normal by using the open / close push button of the field operation switch 130, the open (100%) and closed (0%) positions are not normal. Positioning of the electric valve 120 is performed by using the open button switch 101 and the close button switch 102 of the test equipment 100.

When operating the open button switch 101 of the electric valve test equipment 100 while pressing the open push button of the field operation switch 130 will be described the internal circuit operation process as follows.

As shown in FIG. 2, when the aforementioned electric valve 120 is in an open state, the motor rotates in the open direction in a state in which the contact of the AX1 relay is turned off, and in this state, the open button switch (Open). Pressing the Limit Jumper Switch 101 does not turn off the contact of the MC1 relay even when the electric valve 120 reaches the open limit and maintains the on state (the motor is not stopped and the electric valve 120 is opened). Direction).

In more detail, when the electric valve 120 does not reach the 100% open position while the open push button of the field operation switch 130 is pressed and the electric valve 120 is opened to be less than 100%, the position (Less than 100% open position of the electric valve 120) will be recognized as the opening threshold of the electric valve 120.

In this state, when the pushed button switch is pressed, even when the electric valve 120 reaches the opening limit point (less than 100% of the electric valve 120), the contact of the relay MC1 is kept on and the motor is not stopped. The valve 120 proceeds further in the opening direction beyond the opening threshold and continues until the 100% open position setting of the motorized valve 120 is completed. The operator operates the open button switch 101 of the electric valve test equipment 100 until the 100% open position setting of the electric valve 120 is completed while checking the opening degree of the electric valve 120.

Here, when the electric valve 120 continues in the opening direction and exceeds a certain time by more than 100%, the open torque switch TS-18 is operated to disconnect the circuit and turn off the contact of the TX1 relay.

When operating the close button switch 102 of the electric valve test equipment 100 while pressing the close push button of the field operation switch 130 will be described the internal circuit operation process as follows.

As shown in FIG. 2, when the aforementioned electric valve 120 is in the closed state, the motor rotates in the close direction in a state in which the contact of the AX2 relay is turned off, and in this state, the close button switch (Close). Pressing the Limit Jumper Switch 102 does not turn off the contact of the MC2 relay even when the electric valve 120 reaches the close limit (the motor is not stopped and the electric valve 120 is closed). Direction).

In more detail, when the electric valve 120 does not reach the 0% closed position while the closed push button of the field operation switch 130 is pressed and the electric valve 120 is closed by more than 0%, the position ( 0% or more of the closed position of the electric valve 120) is recognized as the closing threshold of the electric valve 120.

In this state, if the pushed button switch is pressed, the motor does not stop by keeping the contact point of the MC2 relay on even when the electric valve 120 reaches the closing limit point (0% or more of the electric valve 120). The valve 120 proceeds further in the closing direction beyond the closing threshold and continues until the 0% closing position setting of the motorized valve 120 is complete. The operator operates the close button switch 102 of the electric valve test equipment 100 until the 0% closing position setting of the electric valve 120 is completed while checking the opening degree of the electric valve 120.

Here, when the electric valve 120 continues in the closing direction and exceeds a 0% point, the open torque switch TS-17 is operated to disconnect the circuit and turn off the contact of the TX1 relay.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention belongs may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas falling within the scope of the present invention should be interpreted as being included in the scope of the present invention.

As described above, according to the present invention, it is possible to test the electric valve immediately after completion of the disassembly inspection and maintenance of the electric valve, so that a separate commissioning process is unnecessary, thereby reducing work time and overall construction period.

In addition, additional work time and commissioning delays are eliminated by the completion of the preliminary test after maintenance of the electric valve, and the test of the electric valve can be completed in advance, so that mechanical overload during commissioning, poor signal when opening and closing the electric valve, and It is effective to minimize problems such as inconsistencies in the display of 0% and 100%.

In addition, the present invention can reduce the maintenance cost of the electric valve, and can produce a good quality product at an economical price, there is an effect that can maximize the function and efficiency of the electric valve test equipment during the construction period.

In addition, the present invention has the effect that can facilitate the inspection and adjustment of the electric valve because it is possible to test the electric valve using the electric valve test equipment in the field.

1 is a view schematically showing the connection state of the electric valve test equipment and the driving power source and the electric valve body according to a preferred embodiment of the present invention,

2 is a view showing the internal circuit of the electric valve test equipment according to a preferred embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: electric valve test equipment 101: open button switch

102: close button switch 103: power indicator lamp

104: power switch 105: open lamp

106: closed lamp 107: defective lamp

108: ammeter 110: drive power

120: electric valve 130: field operation switch

Claims (4)

In the electric valve test equipment, including a power switch, a power lamp, a closing lamp, an open lamp and an ammeter, for testing the electric valve in the field, A field operation switch configured to receive an open button selection signal or a close button selection signal for driving a motor and input a command to open or close the electric valve; An open button switch for additionally moving the electric valve in the open direction when the opening degree of the electric valve does not reach the 100% open position in the state where the open button selection signal is received; And A closing button switch for additionally moving the electric valve in the closing direction when the opening degree of the electric valve does not reach the 0% closed position in the state where the closing button selection signal is received; Electric valve test equipment comprising a. The method of claim 1, The opening button switch is set to the opening limit of the open limit switch is less than 100% when the opening degree of the electric valve reaches less than 100% in the state that the opening button selection signal is received, and exceeds the set opening limit point. Electric valve test equipment, characterized in that the adjustment of the electric valve is performed until the torque switch is operated. The method of claim 2, When the closing push button selection signal is received and the opening degree of the electric valve reaches less than 0%, the closing button switch is set to a closing limit of 0% or more, and exceeds the set closing limit point. Electric valve test equipment, characterized in that the adjustment of the electric valve is performed until the torque switch is operated. The method of claim 3, wherein The electric valve test equipment is connected to the same power supply line of the power supply capacity of the power supply valve 480 V by separating and connecting the electric motor power cable, and connected to a switch that functions to open or close to the outside through the cable, the electric valve being a test object And electric valve test equipment characterized in that the connection with.