CN205504125U - Nuclear level electric actuator's local control box - Google Patents

Abstract

The utility model discloses an on-site control box of a nuclear-level electric actuator. The on-site control box is respectively connected to an electric panel cabinet and an electric actuator. The valve opening circuit and the valve closing circuit are connected, and are used to conduct or disconnect the connection between the positive pole of the control power supply and the valve opening circuit and the valve closing circuit respectively. The on-site control box of the utility model can realize the maintenance personnel to control the operation of the switch valve of the electric actuator at the maintenance site, without arranging coordinating personnel at the main control room or the electric panel cabinet, which facilitates the on-site operation of the maintenance personnel and reduces the Time and manpower cost. In addition, in the noise and radiation environment, there is no need to take off the protective equipment to make a phone call, which reduces the personal safety risk of maintenance personnel.

Description

Local Control Box for Nuclear Electric Actuators

technical field

The utility model relates to the electrical field, in particular to an on-site control box of a nuclear-level electric actuator.

Background technique

There are usually two ways to control the switch valve operation of non-intelligent nuclear-grade electric actuators. One is to control the switch valve operation in the main control room of the power station, and the other is to control the switch valve in the switchboard of the electrical plant during maintenance and debugging of equipment. Insert the test control box at the place for on-off valve operation control. The above two methods control the on-off valve operation of the electric actuator by controlling the on-off of the power circuit of the electric actuator through switching signals, relays, contactors, etc. Therefore, when the maintenance personnel need to open or close the valve during work, they all need to call the staff in the main control room or the electrical workshop to allow them to perform switch operation control on the electric actuator. Both of the above two methods have the problems of reducing work efficiency and increasing labor costs. Especially in harsh environments such as noise and radiation, the protective equipment of the staff will also hinder telephone communication and restrict each other, greatly increasing working hours, and cannot effectively guarantee Personal safety of maintenance personnel. Therefore, how to control the operation of the electric actuator switch valve more conveniently and quickly, thereby reducing time and labor costs, and reducing the safety risk of on-site maintenance personnel has become an urgent problem to be solved.

Utility model content

The main purpose of the utility model is to solve the technical problem of how to control the operation of the electric actuator switch valve more conveniently and quickly, thereby reducing time and labor costs, and reducing the safety risks of on-site maintenance personnel.

In order to achieve the above purpose, the utility model provides an on-site control box of a nuclear-level electric actuator, the on-site control box is respectively connected to the electric panel cabinet and the electric actuator, the on-site control box includes a switch circuit, The switch circuit is respectively connected with the positive pole of the control power supply, the valve opening circuit and the valve closing circuit, and is used to turn on or disconnect the connection between the positive pole of the control power supply and the valve opening circuit and the valve closing circuit respectively.

Preferably, the switch circuit includes a first control switch and a second control switch, the first control switch is respectively connected to the positive pole of the control power supply and the valve opening circuit, and is used to turn on or off the control power supply The connection between the positive pole of the control power supply and the valve opening circuit, the second control switch is respectively connected to the positive pole of the control power supply and the valve closing circuit, and is used to conduct or disconnect the positive pole of the control power supply and the Close the connection between the valve circuit.

Preferably, the valve opening circuit includes a first relay unit, the first relay unit includes a first relay coil and a first normally open switch, the first relay coil and the first control switch are connected in series to the control Between the positive pole and the negative pole of the power supply, the first normally open switch is connected between the output terminal of the power supply and the power input terminal of the electric actuator.

Preferably, the valve opening circuit further includes a first travel switch located in the electric actuator, and the first travel switch and the first relay coil are connected in series between the first control switch and the control power supply. between negative poles for opening when the valve is fully open and closing when the valve is fully closed or intermediate.

Preferably, the valve opening circuit further includes a valve opening switch and a second relay unit, the second relay unit includes a second relay coil and a second normally open switch, and the second relay coil is connected in series with the valve opening switch Between the positive pole and the negative pole of the control power supply, the second normally open switch is connected in parallel with the first control switch.

Preferably, the valve closing circuit includes a third relay unit, the third relay unit includes a third relay coil and a third normally open switch, the third relay coil and the third control switch are connected in series to the control Between the positive pole and the negative pole of the power supply, the third normally open switch is connected between the output terminal of the power supply and the power input terminal of the electric actuator.

Preferably, the valve closing circuit further includes a second travel switch located in the electric actuator, the second travel switch and the third relay coil are connected in series between the second control switch and the negative pole of the control power supply interval for opening when the valve is in a fully closed state and closing when the valve is in a fully open or intermediate state.

Preferably, the valve closing circuit further includes a valve closing switch and a fourth relay unit, the fourth relay unit includes a fourth relay coil and a fourth normally open switch, and the fourth relay coil is connected in series with the valve closing switch Between the positive pole and the negative pole of the control power supply, the fourth normally open switch is connected in parallel with the second control switch.

Preferably, the local control box further includes an indicating circuit.

Preferably, the indication circuit includes a first indicator light and a second indicator light, the first indicator light and the third travel switch located in the electric actuator are connected in series between the positive pole and the negative pole of the control power supply, The third travel switch is used to close when the valve is in a fully open or intermediate state, and to be disconnected when the valve is in a fully closed state, and the second indicator light is connected with the first Four travel switches are connected in series between the positive pole and the negative pole of the control power supply, and the fourth travel switch is used to close when the valve is in a fully closed or intermediate state, and to be disconnected when the valve is in a fully open state.

The on-site control box of the utility model can realize the maintenance personnel to control the operation of the electric actuator switch valve at the maintenance site, without arranging coordinating personnel in the main control room or the electric panel cabinet, which facilitates the on-site operation of the maintenance personnel and reduces the Time and manpower cost. In addition, in the noise and radiation environment, there is no need to take off the protective equipment to make a phone call, which reduces the personal safety risk of maintenance personnel.

Description of drawings

Fig. 1 is a functional module schematic diagram of an embodiment of an on-site control box of a nuclear-level electric actuator of the present invention;

Fig. 2 is a circuit diagram of an embodiment of the local control box of the nuclear-level electric actuator of the present invention.

The realization of the purpose of the utility model, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

detailed description

It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

The utility model provides an on-site control box of a nuclear-level electric actuator.

Referring to Fig. 1, Fig. 1 is a schematic diagram of the functional modules of an embodiment of the local control box of the nuclear-level electric actuator of the present invention.

In the first embodiment of the on-site control box of the nuclear-level electric actuator of the utility model, the on-site control box is respectively connected to the electric panel cabinet (not shown in the figure) and the electric actuator (not shown in the figure), so The local control box includes a switch circuit 10, the switch circuit 10 is respectively connected with the positive pole of the control power supply, the valve opening circuit 20 and the valve closing circuit 30, and is used to turn on or off the positive pole of the control power supply and the The connection between the valve opening circuit 20 and the valve closing circuit 30 .

In this embodiment, one end of the above-mentioned on-site control box can be connected to the electrical panel cabinet through a cable, the on-site control box is plugged into the cable plug connector of the cable, and the other end of the on-site control box is connected to the electric actuator. The local control box can be plugged into the junction box of the electric actuator.

The switch circuit 10 in the local control box can control the operation of the electric actuator switch valve by turning on or off the connection between the positive pole of the control power supply and the valve opening circuit 20 and the valve closing circuit 30 respectively. The above working principle is: the switch circuit 10 conducts the connection between the positive pole of the control power supply and the valve opening circuit 20, and then inputs the voltage of the control power supply to the valve opening circuit 20, so that the valve opening circuit 20 obtains a high potential signal, thereby controlling the motor. The actuator performs the valve opening operation, otherwise, the switch circuit 10 disconnects the connection between the positive pole of the control power supply and the valve opening circuit 20, then controls the electric actuator to stop the valve opening operation; the switch circuit 10 conducts the positive pole of the control power supply The connection between the valve circuits 30, the voltage of the control power supply is input to the valve closing circuit 30, so that the valve closing circuit 30 obtains a high potential signal, thereby controlling the electric actuator to perform the valve closing operation; otherwise, the switching circuit 10 disconnects the control power supply The connection between the positive pole of the positive electrode and the valve closing circuit 30 controls the electric actuator to stop the valve closing operation.

The on-site control box of this embodiment can realize the maintenance personnel to control the operation of the electric actuator switch valve at the maintenance site, without arranging coordinating personnel in the main control room or the electrical panel cabinet, which facilitates the maintenance personnel's on-site operation and reduces the Time and manpower cost. In addition, in the noise and radiation environment, there is no need to take off the protective equipment to make a phone call, which reduces the personal safety risk of maintenance personnel.

Referring to Fig. 2, Fig. 2 is a circuit diagram of an embodiment of the local control box of the nuclear electric actuator of the present invention.

In the second embodiment of the on-site control box of the nuclear-level electric actuator of the utility model, this embodiment is based on the first embodiment, the switch circuit 10 includes a first control switch T1 and a second control switch T2, so The first control switch T1 is respectively connected to the positive pole of the control power supply and the valve opening circuit 20, and is used to conduct or disconnect the connection between the positive pole of the control power supply and the valve opening circuit 20. The two control switches T2 are respectively connected to the positive pole of the control power supply and the valve closing circuit 30 , and are used for turning on or off the connection between the positive pole of the control power supply and the valve closing circuit 30 .

It should be noted that the types of the above-mentioned first control switch T1 and second control switch T2 can be various, for example, slide switch, toggle switch, button switch, key switch, tact switch, etc. The types of the first control switch T1 and the second control switch T2 are limited.

In this embodiment, there are also multiple implementations of the switch circuit 10. For example, the above switch circuit 10 only includes a switch, which is respectively connected to the positive pole of the control power supply, the valve opening circuit 20 and the valve closing circuit 30. The connection between the positive pole of the control power supply and the valve opening circuit 20 and the valve closing circuit 30 is turned on or off. The above switch can be used by the maintenance personnel to select whether to conduct the valve opening circuit 20 or the valve closing circuit 30 .

Please refer to Fig. 2 again. In the third embodiment of the local control box of the nuclear-level electric actuator of the present invention, this embodiment is based on the first embodiment and the second embodiment, and the valve opening circuit 20 includes the first A relay unit (not shown in the figure), the first relay unit includes a first relay coil K1 and a first normally open switch K01, the first relay coil K1 and the first control switch T1 are connected in series to the Between the positive pole and the negative pole of the control power supply, the first normally open switch K01 is connected between the output terminal of the power supply and the power input terminal of the electric actuator.

In this embodiment, the working principle of the above scheme is: when the first control switch T1 is closed, the positive output voltage of the control power supply is sent to the first relay coil K1, and the first relay coil K1 is energized, so that the first normally open switch K01 Pull in, that is, the first normally open switch K01 conducts the connection between the output end of the power supply and the power input end of the electric actuator, the power supply makes the electric actuator rotate (for example, forward rotation), and the electric actuator drives the valve open.

Further, in this embodiment, the valve opening circuit 20 may further include a first travel switch S1 located in the electric actuator, the first travel switch S1 and the first relay coil K1 are connected in series to the first control Between the switch T1 and the negative pole of the control power supply, it is used to open when the valve is in a fully open state, and to close when the valve is in a fully closed or intermediate state.

The above-mentioned intermediate state of the valve refers to a state in which the valve is neither fully opened nor fully closed.

The working principle of the above scheme is: when the electric actuator rotates to fully open the valve, the first travel switch S1 is triggered to be disconnected, thereby disconnecting the connection between the positive pole of the control power supply and the first relay coil K1, and the first relay coil K1 When the power is lost, the first normally open switch K01 is disconnected, that is, the connection between the output end of the power supply and the power input end of the electric actuator is disconnected, and the electric actuator stops rotating.

It can be seen that the above scheme can automatically stop the rotation after the valve is fully opened by the electric actuator to prevent damage to the valve.

Further, in this embodiment, the above valve opening circuit 20 may also include a valve opening switch T3 and a second relay unit (not shown in the figure), the second relay unit includes a second relay coil K2 and a second normally open The switch K02, the second relay coil K2 and the valve opening switch T3 are connected in series between the positive pole and the negative pole of the control power supply, and the second normally open switch K02 is connected in parallel with the first control switch T1.

The working principle of the above scheme is: close the valve opening switch T3, make the connection between the positive pole of the control power supply and the second relay coil K2 conduct, and the second relay coil K2 is energized, so that the second normally open switch K02 is pulled in, At this time, the connection between the positive pole of the control power supply and the first relay coil K1 is turned on, the first relay coil K1 is energized, and then the first normally open switch K01 is closed, and the output terminal of the power supply is connected to the electric actuator. The connection between the power input terminals, the power supply makes the electric actuator rotate (for example, forward rotation), and the electric actuator drives the valve to open.

The above valve opening switch T3 is located in the main control room, therefore, the above solution realizes the control of the valve opening operation of the electric actuator in the main control room.

Please refer to Figure 2 again. In the fourth embodiment of the local control box of the nuclear electric actuator of the present invention, this embodiment is based on the first embodiment, the second embodiment and the third embodiment. The valve circuit 30 includes a third relay unit (not shown in the figure), the third relay unit includes a third relay coil K3 and a third normally open switch K03, the third relay coil K3 and the third control switch It is connected in series between the positive pole and the negative pole of the control power supply, and the third normally open switch K03 is connected between the output terminal of the power supply and the power input terminal of the electric actuator.

In this embodiment, the working principle of the above scheme is: when the second control switch T2 is closed, the positive output voltage of the control power supply is sent to the third relay coil K3, and the third relay coil K3 is energized, so that the third normally open switch K03 Pull in, that is, the third normally open switch K03 conducts the connection between the output end of the power supply and the power input end of the electric actuator, the power supply makes the electric actuator rotate (for example, reverse), and the electric actuator drives the valve closure.

Further, in this embodiment, the valve closing circuit 30 also includes a second travel switch S2 located in the electric actuator, the second travel switch S2 and the third relay coil K3 are connected in series to the second control switch Between T2 and the negative pole of the control power supply, it is used to disconnect when the valve is in a fully closed state, and to close when the valve is in a fully open or intermediate state.

The working principle of the above scheme is: when the electric actuator rotates to completely close the valve, the second stroke switch S2 is triggered to be disconnected, thereby disconnecting the connection between the positive pole of the control power supply and the third relay coil K3, and the third relay coil K3 When the power is lost, the third normally open switch K03 is disconnected, that is, the connection between the output end of the power supply and the power input end of the electric actuator is disconnected, and the electric actuator stops rotating.

It can be seen that the above scheme can automatically stop the rotation after the valve is completely closed by the electric actuator to prevent damage to the valve.

Further, in this embodiment, the valve closing circuit 30 also includes a valve closing switch T4 and a fourth relay unit (not shown in the figure), and the fourth relay unit includes a fourth relay coil K4 and a fourth normally open switch K04, the fourth relay coil K4 and the valve closing switch T4 are connected in series between the positive pole and the negative pole of the control power supply, and the fourth normally open switch K04 is connected in parallel with the second control switch T2.

The working principle of the above scheme is: close the valve closing switch T4, make the connection between the positive pole of the control power supply and the fourth relay coil K4 conduct, and the fourth relay coil K4 is energized, so that the fourth normally open switch K04 is closed, At this time, the connection between the positive pole of the control power supply and the third relay coil K3 is turned on, the third relay coil K3 is energized, and then the third normally open switch K03 is closed, and the output terminal of the power supply and the electric actuator are connected. The connection between the power input terminals of the power supply, the power supply makes the electric actuator rotate (for example, reverse), and the electric actuator drives the valve to close.

The above valve closing switch T4 is located in the main control room, therefore, the above scheme realizes the control of the valve closing operation of the electric actuator in the main control room.

Please refer to FIG. 2 again. In the fifth embodiment of the on-site control box of the nuclear-level electric actuator of the present invention, this embodiment is based on the above-mentioned embodiments, and the on-site control box also includes an indicating circuit 40 .

The above-mentioned indicating circuit 40 is used to indicate the state of the valve. There are many ways to send out the indicating signal, for example, sending out the indicating signal through the indicator light, sending out the indicating signal through the way of sending out the audio signal and so on.

Further, in this embodiment, the indicator circuit 40 includes a first indicator light L1 and a second indicator light L2, the first indicator light L1 and the third travel switch S3 in the electric actuator are connected in series to the Between the positive and negative poles of the control power supply, the third travel switch S3 is used to close when the valve is in a fully open or intermediate state, and to open when the valve is in a fully closed state, the second indication The lamp L2 and the fourth travel switch S4 located in the electric actuator are connected in series between the positive pole and the negative pole of the control power supply, and the fourth travel switch S4 is used to close when the valve is in a fully closed or intermediate state , and disconnect when the valve is fully open.

The working principle of the above scheme is: when the valve is fully open, the third travel switch S3 is closed, while the fourth travel switch S4 is disconnected, the first indicator light L1 connected in series with the third travel switch S3 is lit, and the fourth The second indicator light L2 connected in series with the travel switch S4 goes out. When the valve is in a fully closed state, the third travel switch S3 is turned off, and the fourth travel switch S4 is closed, the first indicator light L1 connected in series with the third travel switch S3 goes out, and the second indication lamp L1 connected in series with the fourth travel switch S4 Lamp L2 lights up. When the valve is in an intermediate state, both the third travel switch S3 and the fourth travel switch S4 are closed, and both the first indicator lamp L1 and the second indicator lamp L2 are lit.

It can be seen that in this embodiment, the maintenance personnel can know the current state of the valve through the first indicator light L1 and the second indicator light L2 in the local control box, so as to facilitate the further operation of the maintenance personnel.

Further, in this embodiment, corresponding indicator lights can also be set in the electrical panel to indicate the state of the valve, please refer to Figure 2 again, the third indicator light L3 is connected in series with the first indicator light L1, and the fourth indicator light L4 It is connected in series with the second indicator light L2. According to the above working principle, when the valve is fully open, the third indicator light L3 lights up, and the fourth indicator light L4 goes out. When the valve is fully closed, the third indicator light L3 When the valve is off, the fourth indicator light L4 is on, and when the valve is in the middle state, both the third indicator light L3 and the fourth indicator light L4 are on. Therefore, the staff next to the electrical panel can also know the status of the valve through the third indicator light L3 and the fourth indicator light L4.

The above are only preferred embodiments of the utility model, and do not limit the patent scope of the utility model. Any equivalent structure or equivalent process transformation made by using the utility model description and the accompanying drawings may be directly or indirectly used in other related technical fields. , are all included in the scope of patent protection of the utility model in the same way.

Claims (10)

1. An on-site control box of a nuclear-level electric actuator, characterized in that the on-site control box is connected to an electrical panel and an electric actuator respectively, and the on-site control box includes a switch circuit, and the switch circuits are respectively It is connected with the positive pole of the control power supply, the valve opening circuit and the valve closing circuit, and is used to conduct or disconnect the connection between the positive pole of the control power supply and the valve opening circuit and the valve closing circuit respectively. 2. The local control box of nuclear electric actuator according to claim 1, characterized in that, the switch circuit comprises a first control switch and a second control switch, and the first control switch is respectively connected to the control The positive pole of the power supply and the valve opening circuit are used to conduct or disconnect the connection between the positive pole of the control power supply and the valve opening circuit, and the second control switch is respectively connected to the positive pole of the control power supply and the valve opening circuit. The valve closing circuit is used for conducting or disconnecting the connection between the positive pole of the control power supply and the valve closing circuit. 3. The local control box of the nuclear electric actuator according to claim 2, wherein the valve opening circuit comprises a first relay unit, and the first relay unit comprises a first relay coil and a first normal open switch, the first relay coil and the first control switch are connected in series between the positive pole and the negative pole of the control power supply, and the first normally open switch is connected to the output end of the power supply and the electric actuator between the power input terminals. 4. The local control box of the nuclear electric actuator according to claim 3, wherein the valve opening circuit further comprises a first travel switch located in the electric actuator, and the first travel switch connected in series with the first relay coil between the first control switch and the negative pole of the control power supply, for opening when the valve is in a fully open state, and closing when the valve is in a fully closed or intermediate state . 5. The local control box of nuclear electric actuator as claimed in claim 3 or 4, characterized in that, the valve opening circuit also includes a valve opening switch and a second relay unit, and the second relay unit includes a first Two relay coils and a second normally open switch, the second relay coil and the valve opening switch are connected in series between the positive pole and the negative pole of the control power supply, the second normally open switch is connected in parallel with the first control switch . 6. The local control box of nuclear electric actuator as claimed in claim 2, characterized in that, the valve closing circuit comprises a third relay unit, and the third relay unit comprises a third relay coil and a third normal open switch, the third relay coil and the third control switch are connected in series between the positive pole and the negative pole of the control power supply, and the third normally open switch is connected to the output terminal of the power supply and the electric actuator between the power input terminals of the device. 7. The local control box of the nuclear electric actuator according to claim 6, wherein the valve closing circuit further comprises a second travel switch located in the electric actuator, and the second travel switch connected in series with the third relay coil between the second control switch and the negative pole of the control power supply, for opening when the valve is in a fully closed state, and closing when the valve is in a fully open or intermediate state . 8. The local control box of nuclear electric actuator as claimed in claim 6 or 7, characterized in that, the valve closing circuit also includes a valve closing switch and a fourth relay unit, and the fourth relay unit includes the first Four relay coils and a fourth normally open switch, the fourth relay coil and the valve closing switch are connected in series between the positive pole and the negative pole of the control power supply, the fourth normally open switch is connected in parallel with the second control switch . 9. The local control box of the nuclear electric actuator according to claim 1, 2, 3, 4, 6 or 7, wherein the local control box further comprises an indicating circuit. 10. The on-site control box of nuclear electric actuator as claimed in claim 9, characterized in that, the indication circuit includes a first indicator light and a second indicator light, and the first indicator light is connected to the The third travel switch in the actuator is connected in series between the positive pole and the negative pole of the control power supply. The third travel switch is used to close when the valve is fully open or in the middle state, and to close when the valve is fully closed. state, the second indicator light and the fourth travel switch located in the electric actuator are connected in series between the positive pole and the negative pole of the control power supply, and the fourth travel switch is used when the valve is in the Closed when fully closed or intermediate, and open when the valve is fully open.