CN-121995729-A - Safety protection device and method for remote control long-handle tool

CN121995729ACN 121995729 ACN121995729 ACN 121995729ACN-121995729-A

Abstract

The invention provides a safety protection device and a safety protection method for a remote control long-handle tool. The remote controller is connected with the intelligent circuit breaker, and the remote controller sends a signal on-off instruction to the intelligent circuit breaker. The intelligent circuit breaker is arranged in the pneumatic control box, the intelligent circuit breaker is arranged between the electromagnetic valve and a communication line of the control system, and the intelligent circuit breaker controls the on-off of the communication line between the electromagnetic valve and the control system by receiving the signal on-off instruction. The intelligent circuit breaker receives the control signal sent by the control system, the intelligent circuit breaker transmits the received control signal to the electromagnetic valve, the electromagnetic valve controls the expansion and contraction of the air cylinder through the received control signal, and the intelligent circuit breaker feeds back the signal on-off state to the remote controller and the control system. The invention realizes the remote safe locking and unlocking functions of the long-handle tool.

Inventors

ZOU BIN
Han Zichang
TIAN YE
YU QINYUAN
TAO ZEYONG
SUN MAORONG
ZHANG YI
Lv Zongyang

Assignees

国核电站运行服务技术有限公司
上海核工程研究设计院股份有限公司
国电投核能有限公司

Dates

Publication Date: 20260508
Application Date: 20241030

Claims (10)

1. A safety protection device for a remote control long handle tool is provided, wherein an air cylinder is arranged in the long handle tool and is controlled by an electromagnetic valve in a pneumatic control box, the electromagnetic valve is remotely controlled by a control system, and is characterized in that the safety protection device comprises an intelligent circuit breaker and a remote controller; The remote controller is connected with the intelligent circuit breaker, and sends a signal on-off instruction to the intelligent circuit breaker, wherein the signal on-off instruction comprises a signal communication instruction and a signal off instruction; The intelligent circuit breaker is arranged in the pneumatic control box, is arranged between the electromagnetic valve and a communication line of the control system, controls the on-off of the communication line between the electromagnetic valve and the control system by receiving the signal on-off instruction, receives a control signal sent by the control system, and feeds back a signal on-off state to the remote controller and the control system; When the electromagnetic valve is communicated with a communication line between the control systems, the intelligent circuit breaker transmits the received control signal to the electromagnetic valve, and the electromagnetic valve controls the expansion and contraction of the air cylinder through the received control signal.
2. The safety protection device for a remote control long handle tool according to claim 1, wherein a power semiconductor switch is arranged inside the intelligent circuit breaker, and the power semiconductor switch controls the on-off of a communication line between the electromagnetic valve and the control system through a received signal on-off instruction.
3. The safety protection device for remotely controlling a long handled tool according to claim 1, wherein the solenoid valve is controlled by dual electronic control.
4. The safety protection device for a remote controlled long handled tool according to claim 1, wherein the remote controller is communicatively connected to the intelligent circuit breaker by a wired signal or a wireless signal.
5. The safety arrangement for a remotely controlled long handled tool according to claim 1, wherein the cylinder inside the long handled tool provides high pressure gas via a gas source.
6. The safety device for remotely controlling a long handled tool according to claim 5, wherein the high pressure gas provided by the gas source enters the cylinder of the long handled tool through the flow passage of the solenoid valve.
7. The safety protection device for a remotely controlled long handled tool according to claim 5, wherein the air source and the control system are disposed within a safety island, and the air box, the remote controller, and the long handled tool are disposed within a nuclear island.
8. The safety protection device for remotely controlling a long handled tool according to claim 7, wherein the reactor pressure vessel is disposed within a nuclear island, the long handled tool is disposed within the reactor pressure vessel, an operating platform is disposed above the reactor pressure vessel, and the remote controller is fixed to the operating platform.
9. The safety device for remotely controlling a long handled tool according to claim 8, wherein the remote controller is removably secured to the work platform.
10. A safety protection method of a remote control long handled tool, applied to the safety protection device of a remote control long handled tool according to any one of claims 1 to 9, characterized in that the safety protection method comprises: The intelligent circuit breaker is kept in a communication state, the control system sends a control signal to the electromagnetic valve, the electromagnetic valve controls the air cylinder to extend out, and the long-handle tool is connected with the detection robot; The remote controller sends out a signal disconnection instruction, the intelligent circuit breaker receives the signal disconnection instruction and cuts off a communication line between the control system and the electromagnetic valve, the safety locking of the long-handle tool is started, and the intelligent circuit breaker feeds back a signal on-off state to the remote controller and the control system; After the detection robot reaches a specified position and completes fixation, the remote controller sends a signal communication instruction, the intelligent breaker receives the signal communication instruction to close a communication line between the control system and the electromagnetic valve, the safety locking of the long-handle tool is released, the intelligent breaker feeds back a signal on-off state to the remote controller and the control system, the control system sends a control signal to the electromagnetic valve, the electromagnetic valve controls the air cylinder to shrink, and the connection between the long-handle tool and the detection robot is disconnected.

Description

Safety protection device and method for remote control long-handle tool Technical Field The invention relates to the technical field of nuclear power station equipment inspection, in particular to a safety protection device and method for a remote control long-handle tool. Background The reactor pressure vessel is used as a nuclear safety 1-level device for fixing, supporting and containing nuclear fuel and internal components of the reactor, and the life cycle of the reactor pressure vessel covers the complete in-service time of the nuclear power station, so that the key for ensuring that the nuclear power station maintains a normal, efficient and safe running state is ensured. Given the importance of reactor pressure vessels, they need to be regularly inspected in compliance with inspection specifications and guidelines. The reactor pressure vessel has high radioactivity after being put into operation and is realized by using a remote control robot when the inspection is carried out. The domestic nuclear power station generally adopts a long-handle tool hoisting system to hoist the detection robot to a designated position in the reactor pressure vessel for fixing and carrying out subsequent detection operation. The long handle tool hoisting system consists of a long handle tool, a pneumatic control box, an air source and a control system. The long-handle tool is tightly connected with the detection robot, and the pneumatic control box realizes the switching of a pneumatic passage through the position change of the valve core of the internal electromagnetic valve, so that the aim of controlling the movement of the cylinder in the long-handle tool is fulfilled. The gas source provides high pressure gas to a cylinder inside the long handled tool. The control system remotely controls the valve core position change of the electromagnetic valve in the pneumatic control box. In the process that the long handle tool is connected with the detection robot, a remote control person remotely controls the pneumatic control box through a control system, so that the cylinder inside the long handle tool is controlled to perform telescopic movement, the claw at the head is pushed to pop out and retract, and locking and unlocking of the long handle tool and the detection robot are realized. In actual field operation situations, the long handled tool and the pneumatic control box are placed in the nuclear island and the control system for remote control is placed in the safety island remote from the reactor pressure vessel. The remote control personnel are difficult to know the position and state information of the long-handle tool hoisting system in real time due to the fact that the long-handle tool is connected with the detection robot by misoperation, and the detection robot is caused to drop off accidentally. In consideration of the safety of the hoisting operation process of the long-handle tool, a safety protection device is needed, a field operator controls the locking and unlocking authorities of the long-handle tool in the hoisting operation, and a remote control person performs remote control operation to avoid operation risks. At present, a mechanical safety protection device is adopted for the long-handle tool, and the safety locking function is achieved through the cooperation of a pawl and a cylinder follow-up pin. The end of the pawl is provided with a circular ring for providing an anchor point for connection with the wire rope. In the hoisting process of the detection robot, an operator stands on an operation platform above the reactor pressure vessel, holds a steel cable connected with the tail end ring of the pawl and synchronously releases the steel cable along with the descending of the detection robot. And after the detection robot is confirmed to reach the designated position and the fixing is completed, the steel rope is pulled, and the safety locking of the long handle tool is released. In this process, the release speed of the wire rope has a great influence on the operation safety. When the steel rope release speed is lower than the descending speed of the detection robot, an operator can receive downward dragging force from the long-handle tool hoisting system, the safety locking can be accidentally released, and larger potential safety hazards are brought to the operator and hoisting operation. Therefore, the safety hidden trouble caused by releasing the steel cable is eliminated while the accidental falling-off of the detection robot is avoided, and the safety locking and unlocking of the long-handle tool are realized safely and conveniently, so that the problem that the reactor pressure vessel inspection is worth focusing and solving. Disclosure of Invention The invention aims to provide a safety protection device for a remote control long-handle tool, which aims to overcome the defects of the existing mechanical safety protection device. The safety protection device aims at avoiding potential