A safety protection method for crane maintenance

Abstract

The present invention relates to a safety protection method for crane maintenance. In the maintenance preparation stage, a maintenance command signal is sent to a maintenance safety protection controller via a maintenance remote control, and the safety protection controller sends a maintenance command signal to the crane travel motor control circuit; the maintenance personnel disconnects the isolating switch, and the isolating switch disconnection state signal is sent to the maintenance safety protection controller. After receiving the isolating switch disconnection state signal, the maintenance safety protection controller sends an electromagnetic lock locking command signal to the isolating switch electromagnetic lock; after the maintenance remote control sends the maintenance command for a period of time, the maintenance safety protection controller displays it on an electronic signboard according to the received signal; after the maintenance remote control sends the maintenance release command for a period of time, the maintenance safety protection controller displays it on the electronic signboard according to the received signal. The maintenance remote control is always carried and operated by the maintenance personnel during the maintenance process, effectively ensuring the safety of the maintenance personnel.

Description

Technical Field

[0001] The present invention relates to a safety protection method, in particular to a safety protection method for crane maintenance, and belongs to the technical field of production safety protection and intelligentization. Background Art

[0002] In recent years, safety accidents caused by operator misoperation during crane maintenance have occasionally occurred. The main causes of the accidents are: 1. Misoperation of the isolating switch in the maintenance section of the crane's busbar, causing the overhead crane to be energized for maintenance, resulting in electric shock injuries to the maintenance personnel; 2. During the maintenance process, the ground operator misoperated the crane, causing the overhead crane to move during the maintenance process, causing squeezing injuries to the maintenance personnel.

[0003] Research has revealed that cranes are typically equipped with remote controls, operated by operators on the ground, while maintenance personnel perform maintenance on the crane's maintenance platform. During maintenance, the remote control must be manually locked to prevent accidental operation. Furthermore, to prevent electric shock during maintenance, maintenance sections are typically installed on the busbars, along with corresponding isolation switches, which must be disconnected during maintenance. However, these operations require manual operation, which inevitably leads to potential safety hazards due to operator negligence, lack of experience, poor physical condition, and information asynchrony. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a safety protection method for crane maintenance, the purpose of which is to prevent safety accidents during maintenance.

[0005] To achieve the above-mentioned purpose, the present invention provides a safety protection method for crane maintenance. In the maintenance preparation stage, the crane stops at the maintenance section of the busbar. During the maintenance process, the maintenance personnel carry a maintenance remote control and send a maintenance command signal to the maintenance safety protection controller through the maintenance remote control. The safety protection controller sends a maintenance command signal to the crane travel motor control circuit. The crane travel motor control circuit disconnects the maintenance node, the travel motor cannot run, and sends a maintenance node disconnection status signal to the maintenance safety protection controller; the maintenance personnel disconnects the isolation switch, and the isolation switch disconnection status signal is sent to the maintenance safety protection controller. After receiving the isolation switch disconnection status signal, the maintenance safety protection controller sends an electromagnetic lock locking command signal to the isolation switch electromagnetic lock. The electromagnetic lock is closed, and the isolation switch is now inoperable. At the same time, a locking status signal is sent to the maintenance safety protection controller; after the maintenance remote control sends the maintenance command for a period of time, the maintenance safety protection controller displays it on the electronic signboard according to the received signal;

[0006] After the maintenance is completed, the maintenance personnel use the maintenance remote control to send a maintenance release command signal to the maintenance safety protection controller. The maintenance safety protection controller sends an unlocking signal to the electromagnetic lock of the isolation switch. The maintenance personnel manually close the isolation switch. When the maintenance safety protection controller receives the isolation switch closing status signal, it sends a maintenance locking node closing command signal to the crane travel motor control circuit. The maintenance locking node is closed, and the maintenance node closing status signal is sent to the maintenance safety protection controller. After the maintenance remote control sends the maintenance release command for a period of time, the maintenance safety protection controller displays it on the electronic signboard according to the received signal.

[0007] When the maintenance safety protection controller receives the disconnection status signal of the isolation switch, the disconnection status signal of the maintenance node of the crane travel motor control circuit, and the locking status signal of the electromagnetic lock, the electronic sign displays "Crane maintenance is ready" and the maintenance personnel carry out the crane maintenance work.

[0008] When the maintenance safety protection controller does not receive one or more of the disconnection status signal of the isolation switch, the maintenance node disconnection status signal of the crane travel motor control circuit and the electromagnetic lock locking status signal, the name of the signal not received is displayed on the electronic indicator.

[0009] When the maintenance safety protection controller receives the missing signal, the maintenance safety protection controller sends the signal again.

[0010] When the maintenance safety protection controller receives the isolation switch closed state signal and the crane travel motor control circuit maintenance node closed state signal, the electronic indicator displays "Crane is working" and the maintenance times counter increases by 1.

[0011] When the maintenance safety protection controller does not receive the isolation switch closing state signal and / or the maintenance node closing state signal, the name of the signal not received is displayed on the electronic indicator.

[0012] When the maintenance safety protection controller receives the missing signal, the maintenance safety protection controller sends the signal again.

[0013] The maintenance remote controller sends out a maintenance instruction for a period of 1-3 minutes, and sends out a maintenance release instruction for a period of 1-3 minutes.

[0014] Advantages and effects of this invention: It replaces manual operation with locking control, reducing safety incidents caused by human error or information asynchrony. The maintenance remote control is always carried and operated by the maintenance personnel, effectively ensuring their safety. Locking control is used during the preparation phase of crane maintenance, following a unified standard that is unaffected by subjective consciousness and personnel status, thus preventing misoperation. The system automatically accumulates the number of crane maintenance visits, providing a data foundation for the construction of intelligent factories, while also requiring minimal capital investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Prepare linkage diagrams for crane safety guard inspections;

[0016] Figure 2 Prepare electronic board display logic diagrams for crane safety protection device maintenance;

[0017] Figure 3 Repair and release the rope relationship diagram for the safety protection device of the crane;

[0018] Figure 4 The electronic board displays the logic relationship diagram for the maintenance and removal of the safety protection device of the crane. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] As shown in the figure, the present invention provides a safety protection method for crane maintenance. In the maintenance preparation stage, the crane stops at the maintenance section of the busbar. During the maintenance process, the maintenance personnel carry a maintenance remote control and send a maintenance command signal to the maintenance safety protection controller through the maintenance remote control. The safety protection controller sends a maintenance command signal to the crane travel motor control circuit. The crane travel motor control circuit disconnects the maintenance node, the travel motor cannot run, and sends a maintenance node disconnection state signal to the maintenance safety protection controller; the maintenance personnel disconnects the isolation switch, and the isolation switch disconnection state signal is sent to the maintenance safety protection controller. After receiving the isolation switch disconnection state signal, the maintenance safety protection controller sends an electromagnetic lock locking command signal to the isolation switch electromagnetic lock. The electromagnetic lock is closed, and the isolation switch is now inoperable. At the same time, a locking state signal is sent to the maintenance safety protection controller; after the maintenance remote control sends the maintenance command for a period of time, the maintenance safety protection controller displays it on the electronic signboard according to the received signal;

[0021] After the maintenance is completed, the maintenance personnel use the maintenance remote control to send a maintenance release command signal to the maintenance safety protection controller. The maintenance safety protection controller sends an unlocking signal to the electromagnetic lock of the isolation switch. The maintenance personnel manually close the isolation switch. When the maintenance safety protection controller receives the isolation switch closing status signal, it sends a maintenance locking node closing command signal to the crane travel motor control circuit. The maintenance locking node is closed, and the maintenance node closing status signal is sent to the maintenance safety protection controller. After the maintenance remote control sends the maintenance release command for a period of time, the maintenance safety protection controller displays it on the electronic signboard according to the received signal.

[0022] When the maintenance safety protection controller receives the disconnection status signal of the isolation switch, the disconnection status signal of the maintenance node of the crane travel motor control circuit, and the locking status signal of the electromagnetic lock, the electronic indicator board displays that the crane maintenance is ready, and the maintenance personnel carry out the crane maintenance work.

[0023] When the maintenance safety protection controller does not receive one or more of the disconnection status signal of the isolating switch, the maintenance node disconnection status signal of the crane travel motor control circuit and the electromagnetic lock locking status signal, the name of the signal not received is displayed on the electronic indicator board, that is, "Crane maintenance lacks 'XX' operation", including: "Crane maintenance lacks travel motor control circuit maintenance node disconnection operation", "Crane maintenance lacks isolating switch disconnection operation" and "Crane maintenance lacks electromagnetic lock locking operation".

[0024] When the maintenance safety protection controller receives the missing signal, the maintenance safety protection controller sends the signal again. If the maintenance node disconnection operation of the travel motor control circuit is missing, the maintenance safety protection controller sends the maintenance instruction signal to the crane travel motor control circuit again.

[0025] When the maintenance safety protection controller receives the isolation switch closed state signal and the crane travel motor control circuit maintenance node closed state signal, the electronic indicator shows that the crane is working and the maintenance times counter is increased by 1.

[0026] When the maintenance safety protection controller does not receive the isolation switch closing status signal and / or the maintenance node closing status signal, the name of the signal not received is displayed on the electronic indicator, that is, "Crane work lacks 'XX' operation", which includes: "Crane work lacks travel motor control circuit maintenance node closing operation" and "Crane work lacks isolation switch closing operation".

[0027] When the maintenance safety protection controller receives the missing signal, the maintenance safety protection controller sends the signal again.

[0028] The maintenance remote controller sends out a maintenance instruction for a period of 1-3 minutes, and sends out a maintenance release instruction for a period of 1-3 minutes.

Claims

1. A safety protection method for crane maintenance, characterized in that During the maintenance preparation stage, the crane stops at the maintenance section of the busbar. During the maintenance process, the maintenance personnel carry the maintenance remote control and send the maintenance command signal to the maintenance safety protection controller through the maintenance remote control. The safety protection controller sends the maintenance command signal to the crane travel motor control circuit. The crane travel motor control circuit disconnects the maintenance node, and the travel motor cannot run. The maintenance node disconnect status signal is sent to the maintenance safety protection controller; the maintenance personnel disconnects the isolating switch, and the isolating switch disconnect status signal is sent to the maintenance safety protection controller. After receiving the isolating switch disconnect status signal, the maintenance safety protection controller sends the electromagnetic lock locking command signal to the isolating switch electromagnetic lock. The electromagnetic lock is closed, and the isolating switch cannot be operated at this time. At the same time, the locking status signal is sent to the maintenance safety protection controller; after the maintenance remote control sends the maintenance command for a period of time, the maintenance safety protection controller displays it on the electronic signboard according to the received signal; After the maintenance is completed, the maintenance personnel use the maintenance remote control to send a maintenance release command signal to the maintenance safety protection controller. The maintenance safety protection controller sends an unlock signal to the electromagnetic lock of the isolation switch. The maintenance personnel manually close the isolation switch. When the maintenance safety protection controller receives the isolation switch closed state signal, it sends a maintenance locking node closing command signal to the crane travel motor control circuit. The maintenance locking node is closed, and the maintenance node closed state signal is sent to the maintenance safety protection controller. After the maintenance remote control sends the maintenance release command for a period of time, the maintenance safety protection controller displays the received signal on the electronic indicator board. When the maintenance safety protection controller receives the disconnection status signal of the isolation switch, the disconnection status signal of the maintenance node of the crane travel motor control circuit, and the locking status signal of the electromagnetic lock, the electronic indicator displays "Crane maintenance is ready", and the maintenance personnel carry out the crane maintenance work; When the maintenance safety protection controller does not receive one or more of the disconnection status signal of the isolation switch, the maintenance node disconnection status signal of the crane travel motor control circuit and the electromagnetic lock locking status signal, the name of the signal not received is displayed on the electronic indicator.

2. A safety protection method for crane maintenance according to claim 1, characterized in that When the maintenance safety protection controller receives the missing signal, the maintenance safety protection controller sends the signal again.

3. A safety protection method for crane maintenance according to claim 1, characterized in that When the maintenance safety protection controller receives the isolation switch closed state signal and the crane travel motor control circuit maintenance node closed state signal, the electronic sign displays "Crane is working" and the maintenance times counter increases by 1.

4. A safety protection method for crane maintenance according to claim 1, characterized in that When the maintenance safety protection controller does not receive the isolation switch closing state signal and / or the maintenance node closing state signal, the name of the signal not received is displayed on the electronic indicator.

5. A safety protection method for crane maintenance according to claim 4, characterized in that When the maintenance safety protection controller receives the missing signal, the maintenance safety protection controller sends the signal again.

6. A safety protection method for crane maintenance according to claim 1, characterized in that The maintenance remote controller sends out a maintenance instruction for a period of 1-3 minutes, and sends out a maintenance release instruction for a period of 1-3 minutes.

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