Walking beam safety fence interlocking device

Abstract

The utility model relates to a walking beam safety fence interlocking device which comprises a safety fence, a safety door, an electric control lock, a safety door opening and closing state detection device, a door opening request button, a programmable logic controller (PLC) control system, a walking beam equipment indicating lamp and an audible and visual alarm. The safety door is provided with an electric control lock, a safety door opening and closing state detection device and a door opening request button, the electric control lock, the safety door opening and closing state detection device, the door opening request button, the audible and visual alarm and the stepping beam indicator light are connected to the PLC control system, and the audible and visual alarm and the stepping beam indicator light are arranged in an operation room. The walking beam equipment indicating lamps comprise a walking beam equipment movement stopping indicating lamp and a walking beam equipment operation indicating lamp; under the condition that the operation efficiency of a unit is not influenced, the device avoids the risk of man-machine contact and realizes the intrinsic safety of the moving area of the walking beam.

Description

Technical Field

[0001] This utility model relates to the field of mechanical equipment technology, and in particular to a step beam safety fence interlocking device. Background Technology

[0002] The walking beam equipment of the continuous annealing unit is used to transport steel coils used in production. Operators need to enter the walking beam area from time to time to perform tasks such as steel plate inspection and measurement, unbundling, and labeling. There is frequent human-machine contact. The walking beam is automatically controlled by PLC according to the production situation. However, if personnel enter and exit the walking beam equipment while it is running, mechanical injury accidents can easily occur. Since the operators are in the control room, they cannot detect the situation on site in time. Therefore, there is a very large safety hazard if personnel freely enter and exit the walking beam equipment's activity area while it is running. Summary of the Invention

[0003] This utility model provides a safety fence interlocking device for a walking beam, which avoids the risk of human-machine contact without affecting the unit's operating efficiency, and achieves inherent safety in the walking beam's moving area.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A safety fence interlocking device for a walking beam includes a safety fence, a safety door, an electric lock, a safety door opening / closing status detection device, an opening request button, a PLC control system, walking beam equipment indicator lights, and an audible and visual alarm. The safety fence is connected to the safety door and surrounds the moving area of ​​the walking beam. The safety door is equipped with an electric lock, a safety door opening / closing status detection device, and an opening request button. The unlocking signal terminal of the electric lock is connected to the signal output terminal of the PLC control system, and the safety door opening / closing status detection device and the opening request button are connected to the signal input terminal of the PLC control system. The audible and visual alarm and the walking beam indicator lights are located in the control room. The audible and visual alarm is connected to the signal output terminal of the PLC control system. The walking beam equipment indicator lights include a walking beam equipment stop indicator light and a walking beam equipment running indicator light, and the walking beam equipment indicator lights are connected to the signal output terminal of the PLC control system.

[0006] Furthermore, the safety door includes a door frame, a door body, and a connecting shaft. The door frame is fixedly connected to a safety fence, one side of the door body is connected to the door frame via the connecting shaft, and the other side of the door body is connected to the door frame via an electronic lock.

[0007] Furthermore, the door frame adopts a hollow square tube, one side of the split hollow square tube is a grooved square tube, and the other side is a movable cover plate that matches the grooved square tube. The movable cover plate is fixedly connected to the grooved square tube by bolts.

[0008] Furthermore, it also includes a reset button, which is located in the control room and connected to the signal input terminal of the PLC control system.

[0009] Furthermore, the safety door opening / closing status detection device includes a limit switch, a proximity switch, or a reed sensor to detect the opening / closing status of the safety door.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1) This device effectively reduces the risk of human-machine contact and avoids personal injury;

[0012] 2) By connecting the electric lock, the indicator light of the walking beam equipment, the safety door opening and closing status detection device, the door opening request button and the PLC control system, the safety protection function of the safety fence is realized, and the interlocking control with the walking beam equipment is realized.

[0013] 3) The connection cables of the electric lock, safety door opening and closing status detection device, door opening request button and PLC are safely concealed and kept tidy through the split hollow square tube of the door frame. The movable cover plate of the split hollow square tube facilitates the maintenance of the cables inside the split hollow square tube. Attached Figure Description

[0014] Figure 1 This is a block diagram of the control structure of this device.

[0015] Figure 2 This is a schematic diagram of the installation position of the safety door and safety fence described in this utility model.

[0016] In the diagram: 1. Safety fence; 2. Electric lock; 3. Door frame; 4. Door body; 5. Safety door opening / closing status detection device; 6. Door opening request button. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0018] See Figure 1This is a block diagram of the control structure of this utility model. This utility model discloses a safety fence interlocking device for a stepping beam, comprising a safety fence 1, a safety door, an electric lock 2, a safety door opening / closing status detection device 5, an opening request button 6, a PLC control system, stepping beam equipment indicator lights, an audible and visual alarm, and a reset button. The safety fence 1 is connected to the safety door and surrounds the moving area of ​​the stepping beam. The safety door is equipped with the electric lock 2, the safety door opening / closing status detection device 5, and the opening request button 6. The unlocking signal terminal of the electric lock 2 is connected to the signal output terminal of the PLC control system. The safety door opening / closing status detection device 5 and the opening request button 6 are connected to the signal input terminal of the PLC control system. The audible and visual alarm, the reset button, and the stepping beam indicator lights are located in the control room. The audible and visual alarm is connected to the signal output terminal of the PLC control system. The stepping beam equipment indicator lights include a stepping beam equipment stop indicator light and a stepping beam equipment running indicator light. The stepping beam equipment indicator lights and the reset button are connected to the signal input terminal of the PLC control system.

[0019] The safety door includes a door frame 3, a door body 4, and a connecting shaft. The door frame 3 is fixedly connected to the safety fence 1. One side of the door body 4 is connected to the door frame 3 via the connecting shaft, and the other side of the door body 4 is connected to the door frame 3 via an electric lock 2. The side of the door frame 3 connected to the safety door via the electric lock 2 adopts a split hollow square tube. One side of the split hollow square tube is a grooved square tube, and the other side is a movable cover plate that matches the grooved square tube. The movable cover plate is fixedly connected to the grooved square tube by bolts.

[0020] The safety door opening / closing status detection device 5 uses limit switches, proximity switches, or reed sensors to detect the opening / closing status of the safety door.

[0021] The electric lock 2 automatically locks based on the walking beam running signal to prevent personnel from entering the area of ​​the running walking beam. The electric lock 2 automatically opens based on the walking beam running signal and the door opening request button 6 signal, allowing personnel to enter the area of ​​the stationary walking beam. When the safety door opening / closing status detection detects that the safety door is open, the walking beam is not allowed to run automatically. When the full door opening / closing status detection device 5 detects that the safety door is reliably closed, the walking beam is allowed to run automatically after the reset button is pressed manually.

[0022] Working principle:

[0023] 1. Safety fence 1 and openable and closable safety door are placed around the moving area of ​​the walking beam equipment to close off the moving area of ​​the walking beam equipment;

[0024] 2. An electric lock 2, a safety door opening / closing status detection device 5, and an opening request button 6 are installed on the safety door. The unlocking signal terminal of the electric lock 2 is connected to the signal output terminal of the PLC control system, and the safety door opening / closing status detection device 5 and the opening request button 6 are connected to the signal input terminal of the PLC control system.

[0025] 3. When the walking beam equipment is running, the running indicator light of the walking beam equipment will be on, and the electric lock 2 will be activated to lock the safety door. At the same time, the signal of the door opening request button 6 will be disconnected, so that the safety door cannot be opened and personnel will be prevented from approaching the running walking beam equipment.

[0026] 4. When the cycle of the walking beam equipment ends, the electric lock 2 remains locked, and the signal of the door opening request button 6 is activated. You can safely enter the working area of ​​the walking beam equipment by opening the door request button 6.

[0027] 5. After the safety door is opened, the walking beam equipment and the safety door electric lock 2 are interlocked, and the walking beam equipment is not allowed to run automatically. At the same time, the audible and visual alarm in the control room will issue a warning to Ou Ren to enter the walking beam area for work.

[0028] 6. Even after the safety door is closed, the walking beam equipment must not be operated and a warning should continue to be issued;

[0029] 7. After the personnel finish their work, the operator in the control room confirms that the environment in the walking beam area is safe, presses the reset button, the alarm is cleared, the safety door is locked, the walking beam is ready for operation, and enters automatic operation mode.

[0030] The above embodiments are implemented based on the technical solution of this utility model, providing detailed implementation methods and specific operation processes. However, the protection scope of this utility model is not limited to the above embodiments. Unless otherwise specified, the methods used in the above embodiments are conventional methods.

Claims

1. A step beam security fence interlock device characterised by, The system includes a safety fence, a safety door, an electric lock, a safety door opening / closing status detection device, an opening request button, a PLC control system, indicator lights for the walking beam equipment, and an audible and visual alarm. The safety fence is connected to the safety door and surrounds the moving area of ​​the walking beam. The safety door is equipped with an electric lock, a safety door opening / closing status detection device, and an opening request button. The unlocking signal terminal of the electric lock is connected to the signal output terminal of the PLC control system, and the safety door opening / closing status detection device and the opening request button are connected to the signal input terminal of the PLC control system. The audible and visual alarm and the walking beam indicator lights are located in the control room. The audible and visual alarm is connected to the signal output terminal of the PLC control system. The walking beam equipment indicator lights include a walking beam equipment stop indicator light and a walking beam equipment running indicator light, and the walking beam equipment indicator lights are connected to the signal output terminal of the PLC control system.

2. A step beam security fence interlock device according to claim 1 wherein, The safety door includes a door frame, a door body, and a connecting shaft. The door frame is fixedly connected to a safety fence. One side of the door body is connected to the door frame via the connecting shaft, and the other side of the door body is connected to the door frame via an electric lock.

3. A step beam security fence interlock device according to claim 2, characterised in that, The door frame adopts a split hollow square tube. One side of the split hollow square tube is a grooved square tube, and the other side is a movable cover plate that matches the grooved square tube. The movable cover plate is fixedly connected to the grooved square tube by bolts.

4. A step beam safety fence interlock device according to claim 1 wherein, It also includes a reset button, which is located in the control room and connected to the signal input terminal of the PLC control system.

5. A step beam safety fence hasp in accordance with claim 1 wherein, The safety door opening / closing status detection device includes a limit switch, a proximity switch, or a reed sensor to detect the opening / closing status of the safety door.

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