A safety warning system for overhead cranes at personnel access entrances and exits

Abstract

The invention relates to a safety early warning system for an overhead crane at an entrance and exit for personnel passing through a steelmaking area, comprising an overhead crane data transmission remote unit, a voice speaker, an overhead crane alarm, a PLC data collection and control unit, an overhead crane tracking and positioning unit, a PLC data collection and control unit, and a personnel identification camera device. The safety early warning system for an overhead crane at an entrance and exit for personnel passing through a steelmaking area is designed by using the above equipment, the PLC data collection and control unit is connected to the voice speaker and the projection device, and automatic control is performed according to the on-site personnel identification camera device and the positioning of the overhead crane. The invention realizes the function of performing dual early warnings of voice and projection in advance, and eliminates the phenomenon of personnel passing or staying at this position with hanging objects.

Description

Technical Field

[0001] This patent application belongs to the field of steelmaking safety technology in the metallurgical industry, and more specifically, it relates to a safety warning system for overhead cranes at personnel access entrances and exits. Background Art

[0002] Safety in production is the premise of a company's normal production and operation, and it is related to the personal safety of every employee and the happiness of every family. Tangshan Stainless Steel Company has formulated safety management goals based on the current production and equipment conditions: forward checkpoints, source control, prevention first, and comprehensive management, requiring the improvement of the above concepts and the advancement of thinking to continuously use improvement methods to achieve the overall safety management goals.

[0003] The entrance and exit of the third phase of steelmaking is an important entrance and exit for personnel in the steelmaking area. It involves the 240t overhead crane for charging, the old and new 32t overhead cranes, and the new 180t overhead crane for loading iron and lifting scrap steel. There are two problems in the operation of the overhead crane:

[0004] 1. The height of the overhead crane for loading materials is 25 meters. The driver's seat is on the south side, and there is a blind spot in the vision, so people who pass by by mistake cannot be found in time.

[0005] 2. Due to the noise in the working environment within the factory, when the operating personnel, especially the relevant personnel, enter the material loading area from the entrance and exit of the third phase of steelmaking, there is a dangerous situation that the ground personnel fail to notice the operation of the overhead crane in time and pass under the suspended objects, which poses a great safety hazard. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a safety warning system for an overhead crane at a personnel passage entrance and exit, so as to eliminate the phenomenon of personnel passing or staying at this position with hanging objects.

[0007] In order to solve the above problems, the technical solution adopted by the present invention is:

[0008] A safety warning system for an overhead crane at a personnel entrance and exit includes an overhead crane data transmission remote unit arranged on the overhead crane, and a coding cable communicatively connected to the overhead crane data transmission remote unit. The coding cable is laid beside the track of the locomotive and connected to an address generator in the overhead crane tracking and positioning unit for data transmission.

[0009] The crane tracking and positioning unit is connected to the PLC data collection and control unit via industrial Ethernet to transmit and exchange crane data information. The PLC data collection and control unit processes the received data and then issues instructions through the output module.

[0010] The output module is respectively connected to the on-site voice speaker and the overhead crane warning device, and the input module of the PLC data collection control unit is connected to the personnel identification camera device.

[0011] A further improvement of the technical solution of the present invention is that: the on-site voice speaker is installed above the safety passage and is connected to the output module of the PLC data collection control unit through a 220V intermediate relay for control;

[0012] The overhead crane warning device is installed just above the middle of the safety passage and is connected to the output module of the PLC data collection control unit through a 24V intermediate relay for control.

[0013] The personnel identification camera device is installed in the upper direction of the middle of the safety passage and connected to the input module of the PLC data collection control unit. The personnel identification camera device radiates downward.

[0014] A further improvement of the technical solution of the present invention is that the overhead travelling crane tracking and positioning unit and the overhead travelling crane data transmission remote unit realize real-time and accurate data exchange through wireless technology.

[0015] A further improvement of the technical solution of the present invention is that the coding cable uses a special coding cable with inductive wireless technology, which successfully solves the two major problems of automatic control of mobile locomotives: reliable data communication and precise position detection.

[0016] A further improvement of the technical solution of the present invention is that: the data transmission remote unit of the overhead crane includes an address detector and a communication wireless box, the address detector obtains the address information on the overhead crane, and the communication wireless box is connected to the coding cable;

[0017] The overhead crane tracking and positioning unit includes an address generator, a switch, a server, and a wireless base station. The server receives the overhead crane position data through the wireless base station, the switch is connected to the PLC data collection control unit through industrial Ethernet, and the address generator is connected to the coding cable to transmit the address signal.

[0018] Corresponding service parameters: Processor CPU: Standard 2 Intel Xeon processors E5-2620v4, switch model: S2720-28TP-EI-AC Layer 2 Enterprise Ethernet Intelligent 100M Access Switch. Main parameters: A: 24 10 / 100Base-TX Ethernet ports, 4 Gigabit SFP, 2 multiplexed 10 / 100 / 1000Base-T Ethernet ports Combo B: AC power supply C: Forwarding performance: 9.6Mpps D: Switching capacity: 12.8Gbps.

[0019] The further improvement of the technical solution of the present invention is that the carrier center frequency of the communication wireless box in the remote unit of the data transmission of the overhead crane is 79KHz, which can work in an environment of -25℃~85℃ for a long time. It is resistant to industrial pollution, co-frequency interference, vibration and impact; it can adapt to the harsh coking industrial environment. The mean time between failures is greater than 12 months.

[0020] A further improvement of the technical solution of the present invention is that the voice speaker uses a high temperature resistant loudspeaker with a penetration distance greater than 1000 meters, clear sound quality, a power of 40W, and adopts original sound fidelity technology.

[0021] The further improvement of the technical solution of the present invention is that the working voltage of the overhead crane warning device is 220V, the subtitle color is blue / red, and the lens group can be adjusted to make the projected image clear.

[0022] The further improvement of the technical solution of the present invention is that the personnel identification camera device has a downward radiation angle of 30°~45°. The personnel identification camera device has a perimeter prevention alarm function. When a person appears in the safety passage, according to the 275m and 225m alarm setting positions and the real-time operation position of the overhead crane, the early warning device is interlocked and activated, which can realize voice alarm and projection display before and during the event - pay attention to falling objects from high altitude.

[0023] Due to the adoption of the above technical solution, the beneficial effects achieved by the present invention are:

[0024] The present invention connects the personnel identification camera, projection and sound warning devices to the PLC data collection control unit and the crane positioning program, compiles the crane positioning warning program, and identifies personnel in the entrance and exit areas of the third phase of steelmaking. When the 240t crane for charging, the old and new 32t cranes, and the new 180t crane run from west to east and from east to west to carry out related operations such as loading iron and transporting scrap steel, when they reach the 275m and 225m positioning positions, or other positioning positions at other heights, the interlocking starts the warning device, and the warning device performs voice alarms and projection displays - pay attention to falling objects from high altitudes. The function of dual warning of voice and projection in advance is realized, eliminating the phenomenon of people passing or staying at this position.

[0025] The present invention eliminates the phenomenon of people passing or staying at this location with objects while lifting objects through the safety warning system of the overhead crane at the personnel passage entrance and exit, thus avoiding potential safety hazards for personnel. When the overhead crane needs to pass through this entrance and exit for related operations such as loading iron and lifting scrap steel, the present invention can be used to achieve pre- and in-process control, interlock and start the warning device, and perform voice alarms and project information to display words such as "Beware of falling objects from high altitudes". Improved means are used to achieve safety management goals such as moving the checkpoints forward, source control, prevention first, and comprehensive management. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1It is a schematic diagram of the structure of the present invention;

[0027] Among them, 1. Overhead crane data transmission remote unit, 2. Coding cable, 3. Overhead crane tracking and positioning unit, 4. PLC data collection and control unit, 5. Voice speaker, 6. Overhead crane warning device, 7. Personnel identification camera device. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below with reference to the embodiments.

[0029] The present invention discloses a safety warning system for a personnel access entrance and exit overhead travelling vehicle. Figure 1 , including a crane data transmission remote unit 1 arranged on the crane, and a coding cable 2 connected to the crane data transmission remote unit 1. The coding cable 2 is laid beside the track of the locomotive and connected to the address generator in the crane tracking and positioning unit 3 for data transmission.

[0030] The overhead crane tracking and positioning unit 3 is connected to the PLC data collection and control unit 4 through industrial Ethernet to transmit and exchange overhead crane data information. The PLC data collection and control unit 4 processes the received data and then issues instructions through the output module.

[0031] The output module is connected to the on-site voice speaker 5 and the overhead crane warning device 6 respectively, and the input module of the PLC data collection control unit 4 is connected to the personnel identification camera device 7.

[0032] Specifically, the on-site voice speaker 5 is installed above the safety passage and is connected to the output module of the PLC data collection control unit 4 through a 220V intermediate relay for control.

[0033] The overhead crane warning device 6 is installed just above the middle of the safety passage and is connected to the output module of the PLC data collection control unit 4 through a 24V intermediate relay for control.

[0034] The personnel identification camera device 7 is installed just above the middle of the safety passage and connected to the input module of the PLC data collection control unit 4. The personnel identification camera device 7 radiates downward.

[0035] The overhead crane tracking and positioning unit 3 and the overhead crane data transmission remote unit 1 realize real-time and accurate data exchange through wireless technology.

[0036] The coding cable 2 uses an inductive wireless coding cable, which successfully solves the two major problems of automatic control of mobile locomotives: reliable data communication and precise position detection.

[0037] The data transmission remote unit 1 of the overhead crane includes an address detector and a communication wireless box. The address detector obtains the address information on the overhead crane, and the communication wireless box is connected to the coding cable 2.

[0038] The overhead crane tracking and positioning unit 3 includes an address generator, a switch, a server, and a wireless base station. The server receives the overhead crane position data through the wireless base station. The switch is connected to the PLC data collection control unit 4 through industrial Ethernet. The address generator is connected to the coding cable 2 to transmit the address signal.

[0039] Service parameters: Processor CPU: Standard 2 Intel Xeon processors E5-2620v4, switch model: S2720-28TP-EI-AC Layer 2 Enterprise Ethernet Intelligent 100M Access Switch. Main parameters: A: 24 10 / 100Base-TX Ethernet ports, 4 Gigabit SFP, 2 multiplexed 10 / 100 / 1000Base-T Ethernet ports Combo B: AC power supply C: Forwarding performance: 9.6Mpps D: Switching capacity: 12.8Gbps.

[0040] The carrier center frequency of the communication wireless box in the remote unit 1 of the overhead crane data transmission is 79KHz, and the working environment is -25℃~85℃; the average trouble-free time is greater than 12 months. It is resistant to industrial pollution, co-frequency interference, vibration and impact; and can adapt to the harsh coking industrial environment.

[0041] exist Figure 1 middle:

[0042] 1. The crane warning device 6 uses Anshan Hongdun, with an operating voltage of 220V and subtitles in blue / red colors. The lens group can be adjusted to make the projected image clear.

[0043] 2. Voice alarm device: The on-site voice speaker 5 uses a high temperature resistant loudspeaker with a penetration distance greater than 1000 meters and clear sound quality, a power of 40W, and adopts original sound fidelity technology. The effect is very good after on-site use. The on-site voice speaker 5 is installed above the safety channel and connected to the output module of the PLC data collection control unit 4 through a 220V intermediate relay for control.

[0044] 3. The downward radiation angle of the personnel identification camera device 7 is 30°~45°, such as 30°, 32°, 35°, 38°, 40°, 42°, and 45°. It has a perimeter protection alarm function. When a person appears in the safety passage, according to the 275m and 225m alarm setting positions and the real-time operating position of the overhead crane, the early warning device is interlocked and started, which can realize voice alarm and projection display before and during the event - pay attention to falling objects from high altitude. The personnel identification camera device 7 used is a daily spare part of the warehouse, and no new equipment is purchased, which can better save costs.

[0045] 4. The crane tracking and positioning unit 3 is connected to the PLC data collection and control unit 4 through industrial Ethernet to transmit and exchange crane data information. The received data of the PLC data collection and control unit 4 is processed and then issued instructions through the output module. The overall network Ethernet intelligent 100M access switch can achieve simple installation, simple configuration, simple monitoring and simple fault handling, greatly reducing the initial installation and configuration costs; improving upgrade efficiency and reducing engineering costs.

[0046] 5. The PLC data collection control unit 4 receives the data from the overhead crane tracking and positioning unit 3 and the personnel identification camera device 7 through the industrial Ethernet and signal line, and then processes it through the overhead crane pre-alarm program in the CPU 6ES7 416-2XN05-OABO, and finally the output module issues a command. The power supply and control circuit adopts CEFR 3*1.5 marine cable, and uses Schneider 220V RXM relay and Schneider 24V RT4 relay to control the voice speaker 5 and the overhead crane alarm 6 respectively, so as to realize pre- and in-process warning.

[0047] The entrance and exit of the third phase of steelmaking is an important entrance and exit for personnel. This safety warning system is designed to connect the personnel identification camera, projection and sound warning devices with the PLC data collection control unit and the crane positioning program, and compile the crane positioning warning program to identify personnel at the entrance and exit area of ​​the third phase of steelmaking. When the 240t overhead crane, the old and new 32t overhead crane, and the new 180t overhead crane are running from west to east and from east to west to load iron, transport scrap steel and other related operations, they need to pass through this entrance and exit. When they reach the 275m and 225m positioning positions, the interlocking starts the warning device, and the warning device issues a voice alarm and displays the words "Beware of falling objects from high altitude" through information projection. This move realizes the function of dual warning of voice and projection in advance, eliminates the phenomenon of personnel passing or staying at this position with hanging objects, and has extremely high promotion and application value.

Claims

1. A safety warning system for overhead travelling vehicles at personnel access entrances and exits, characterized in that: The invention comprises a crane data transmission remote unit (1) arranged on the crane, and a coding cable (2) connected to the crane data transmission remote unit (1) for communication, wherein the coding cable (2) is laid beside the track of the locomotive, and the coding cable (2) is connected to the crane tracking and positioning unit (3) for data transmission; The overhead crane tracking and positioning unit (3) is connected to the PLC data collection and control unit (4) via industrial Ethernet to transmit and exchange overhead crane data information, and the PLC data collection and control unit (4) processes the received data and issues instructions via an output module; The output module is respectively connected to the on-site voice speaker (5) and the overhead crane warning device (6), and the input module of the PLC data collection control unit (4) is connected to the personnel identification camera device (7); The overhead crane warning device (6) is installed just above the middle of the safety passage and is connected to the output module of the PLC data collection control unit (4) through a 24V intermediate relay for control; The data transmission remote unit (1) of the overhead crane includes an address detector and a communication wireless box, wherein the address detector obtains address information on the overhead crane, and the communication wireless box is connected to a coding cable (2); The overhead crane tracking and positioning unit (3) comprises an address generator, a switch, a server, and a wireless base station. The server receives the overhead crane position data through the wireless base station. The switch is connected to the PLC data collection control unit (4) through industrial Ethernet. The address generator is connected to the coding cable (2) to transmit the address signal. The crane warning device (6) gives a voice alarm and displays a projection message: "Beware of falling objects." 2. A safety warning system for overhead travelling crane at a personnel access entrance according to claim 1, characterized in that: The on-site voice speaker (5) is installed above the safety passage and connected to the output module of the PLC data collection control unit (4) through a 220V intermediate relay; The personnel identification camera device (7) is installed just above the middle of the safety passage and connected to the input module of the PLC data collection control unit (4), and the personnel identification camera device (7) radiates downwards.

3. The safety warning system for overhead travelling crane at a personnel access entrance according to claim 1, characterized in that: The overhead crane tracking and positioning unit (3) and the overhead crane data transmission remote unit (1) realize real-time and accurate data exchange through wireless technology.

4. The safety warning system for overhead travelling crane at a personnel access entrance according to claim 1, characterized in that: The coding cable (2) adopts an inductive wireless coding cable.

5. A safety warning system for overhead travelling crane at a personnel access entrance according to claim 4, characterized in that: The carrier center frequency of the communication wireless box in the overhead crane data transmission remote unit (1) is: 79KHz, the working environment is -25℃~85℃; the mean time between failures is greater than 12 months.

6. The safety warning system for overhead travelling crane at a personnel access entrance according to claim 1, characterized in that: The voice speaker (5) is a high temperature resistant loudspeaker with a penetration distance greater than 1000 meters.

7. The safety warning system for overhead travelling crane at a personnel access entrance according to claim 1, characterized in that: The personnel identification camera device (7) has a downward radiation angle of 30° to 45°.

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