Real-time transmission marine crane mechanical safety monitoring device

Abstract

The utility model belongs to the technical field of safety monitoring of ocean cranes, and provides a mechanical safety monitoring device for an ocean crane, which can realize real-time transmission. The device comprises a sensor assembly, a data acquisition card, a digital filter, a PLC (Programmable Logic Controller), a display, a relay, a sound player and a power supply, the sensor component is mounted on the ocean crane; the input end of the data acquisition card is communicated with the sensor component, and the output end of the data acquisition card is communicated with the input end of the digital filter; the output end of the digital filter is communicated with the input end of the PLC; the input end of the display and the relay are respectively communicated with the output end of the PLC; the relay is further communicated with the sound player, and the power supply provides power for the whole device through the power supply circuit. According to the utility model, the working state of the ocean crane can be comprehensively detected and can be transmitted and displayed in real time; the functions are diversified, and the safety, reliability and maintainability of the ocean crane are improved; the structure is simple, operation is easy, and safety and reliability are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of marine crane safety monitoring, in particular to a real-time transmission marine crane mechanical safety monitoring device. Background Art

[0002] Offshore cranes are mainly used on offshore platforms for loading and unloading cargo and lifting personnel to the platforms. They are one of the most important production and safety equipment in marine operations. Due to the complex marine environment and the direct impact on the personal safety of workers, offshore cranes have high requirements for safety, reliability, maintainability, wind resistance and corrosion resistance.

[0003] The working environment of offshore cranes is changeable and complex. They often operate under wind and waves and platform lifting conditions. They are subject to loads and interference from self-weight, external forces, environment, platform movement, and other factors, and the forces are complex. Long-term use of offshore cranes can easily cause deformation of their metal structures, loosening of parts, and other failures. However, offshore cranes are generally used far away from land and are huge in size, which is not conducive to maintenance and guarantee. After a failure occurs, it is difficult to find the problem in time and quickly repair it, resulting in construction delays and economic losses. In modern production operations that focus on production efficiency, how to improve the safety and reliability of offshore cranes, quickly find the cause of damage and repair it has attracted the attention of industry insiders. Utility Model Content

[0004] In view of the above technical problems in the prior art, the utility model proposes a real-time transmission marine crane mechanical safety monitoring device, which can monitor the working parameters of the marine crane in real time, and give early or real-time alarms for possible overload, resonance, overturning, deformation and other faults, while being low-cost and easy to operate. The technical solution adopted by the utility model is as follows:

[0005] A real-time transmission marine crane mechanical safety monitoring device, the device comprising a sensor component, a data acquisition card, a digital filter, a PLC controller, a display, a relay, a sound player and a power supply;

[0006] The sensor assembly is installed on the marine crane; the input end of the data acquisition card is connected to the sensor component, and the output end thereof is connected to the input end of the digital filter; the output end of the digital filter is connected to the input end of the PLC controller; the input end of the display and the relay are respectively connected to the output end of the PLC controller; the relay is also connected to the sound player, and the power supply provides power to the entire device through the power circuit;

[0007] The sensor assembly includes a stress sensor, a force sensor, a vibration sensor, an angle sensor and a distance sensor; the stress sensor is installed on the metal structure of the marine crane, and is used to obtain the stress data of the metal structure at the corresponding position in real time, and transmit it to the data acquisition card; the force sensor is installed on the load-bearing component of the marine crane, and is used to obtain the force data of the load-bearing structure at the corresponding position in real time, and transmit it to the data acquisition card; the vibration sensor is installed on the key component of the marine crane, and is used to obtain the vibration data of the key component at the corresponding position in real time, and transmit it to the data acquisition card; the angle sensor is installed on the rotating component of the marine crane, and is used to obtain the angle data of the rotating component at the corresponding position in real time, and transmit it to the data acquisition card;

[0008] The data acquisition card is used to collect data signals from different sensor components, convert the data signals into digital signals, and transmit the digital signals to the digital filter;

[0009] The digital filter is used to filter the digital signal transmitted by the data acquisition card and then transmit it to the PLC controller;

[0010] After receiving the digital signal transmitted by the digital filter, the PLC controller converts the digital signal into corresponding data information; it is also used to transmit the data information to the display for display; it is also used to determine whether the data information exceeds the safety range, if so, control the relay to connect, so that the sound player plays the alarm sound, if not, keep the status quo;

[0011] The display is used to display data information transmitted by the PLC controller;

[0012] The relay is used to connect or disconnect under the control of the PLC controller;

[0013] The sound player is used to play the alarm sound when the relay is connected;

[0014] The power supply is used to provide electric power.

[0015] The real-time transmission marine crane mechanical safety monitoring device described in the utility model is applicable to a marine crane, comprising a base, a slewing mechanism, a boom, an A-frame, a lifting mechanism, a luffing mechanism and a power system, wherein the above-mentioned metal structure comprises the boom, the A-frame and the slewing mechanism, the load-bearing components comprise the bearings of the slewing mechanism, the bottom and fixings of the base, the output end of the power system, the wire rope of the lifting mechanism and the wire rope of the luffing mechanism, the key components comprise the slewing mechanism, the power system, the lifting mechanism and the luffing mechanism, and the rotating components comprise the bearings of the slewing mechanism and the hinges of the lifting mechanism.

[0016] Among them, the PLC controller is also used to determine whether the filtered digital signal exceeds the safety range. If so, the relay is controlled to connect so that the sound player plays an alarm sound, if not, the status quo is maintained. Specifically, it includes: determining whether the real-time stress data of the metal structure exceeds the corresponding preset stress safety threshold. If so, the relay is controlled to connect so that the sound player plays an alarm sound, if not, the status quo is maintained; determining whether the real-time force data of the load-bearing component exceeds the corresponding preset force safety threshold. If so, the relay is controlled to connect so that the sound player plays an alarm sound, if not, the status quo is maintained; determining whether the real-time vibration data of the key component is the same as the corresponding preset resonance frequency. If so, the relay is controlled to connect so that the sound player plays an alarm sound, if not, the status quo is maintained.

[0017] The real-time transmission marine crane mechanical safety monitoring device described in the utility model has the following beneficial effects:

[0018] 1. The real-time transmission marine crane mechanical safety monitoring device of the utility model can comprehensively detect the working status of the marine crane and transmit and display it in real time;

[0019] 2. This device has various practical functions. It can monitor the stress and strain of metal structures in real time, monitor the stress of load-bearing components in real time to eliminate the risk of overload, monitor the vibration of key components in real time to eliminate the risk of resonance, reflect the working status of the rotating mechanism in real time, and monitor the working status of the entire offshore crane in real time to facilitate maintenance personnel to find the fault location, thereby improving the safety, reliability and maintainability of offshore cranes;

[0020] 3. The utility model monitors the stress state of the base fixing parts and can monitor whether the marine crane is in danger of capsizing;

[0021] 4. The utility model has a simple structure, is easy to operate, and is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a real-time transmission marine crane mechanical safety monitoring device in an embodiment of the utility model;

[0023] Figure 2 This is a structural diagram of the marine crane of the utility model.

[0024] Among them, 1 is the base, 2 is the slewing mechanism, 3 is the boom, 4 is the A-frame, 5 is the lifting mechanism, and 6 is the luffing mechanism. DETAILED DESCRIPTION

[0025] In order to more clearly illustrate the present invention, the technical solution of the present invention is described below in conjunction with the embodiments and drawings. However, it should be noted that the embodiments described below are exemplary and intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0026] Example 1

[0027] This embodiment provides a real-time transmission marine crane machinery safety monitoring device, the device includes a sensor component, a data acquisition card, a digital filter, a PLC controller, a display, a relay, a sound player and a power supply;

[0028] like Figure 1 As shown, the sensor component is installed on the marine crane; the input end of the data acquisition card is connected to the sensor component, and the output end thereof is connected to the input end of the digital filter; the output end of the digital filter is connected to the input end of the PLC controller; the input end and the relay of the display are respectively connected to the output end of the PLC controller; the relay is also connected to the sound player, and the power supply provides power to the entire device through the power supply circuit;

[0029] The sensor assembly includes a stress sensor, a force sensor, a vibration sensor, an angle sensor and a distance sensor; the stress sensor is installed on the metal structure of the marine crane, and is used to obtain the stress data of the metal structure at the corresponding position in real time, and transmit it to the data acquisition card; the force sensor is installed on the load-bearing component of the marine crane, and is used to obtain the force data of the load-bearing structure at the corresponding position in real time, and transmit it to the data acquisition card; the vibration sensor is installed on the key component of the marine crane, and is used to obtain the vibration data of the key component at the corresponding position in real time, and transmit it to the data acquisition card; the angle sensor is installed on the rotating component of the marine crane, and is used to obtain the angle data of the rotating component at the corresponding position in real time, and transmit it to the data acquisition card;

[0030] The data acquisition card is used to collect data signals from different sensor components, convert the data signals into digital signals, and transmit the digital signals to the digital filter;

[0031] The digital filter is used to filter the digital signal transmitted by the data acquisition card and then transmit it to the PLC controller;

[0032] After receiving the digital signal transmitted by the digital filter, the PLC controller converts the digital signal into corresponding data information; it is also used to transmit the data information to the display for display; it is also used to determine whether the data information exceeds the safety range, if so, control the relay to connect, so that the sound player plays the alarm sound, if not, keep the status quo;

[0033] The display is used to display data information transmitted by the PLC controller;

[0034] The relay is used to connect or disconnect under the control of the PLC controller;

[0035] The sound player is used to play the alarm sound when the relay is connected;

[0036] The power supply is used to provide electric power.

[0037] The marine crane described in this embodiment is as follows: Figure 2 As shown, it includes a base 1, a slewing mechanism 2, a boom 3, an A-frame 4, a lifting mechanism 5, a luffing mechanism 6 and a power system, wherein the above-mentioned metal mechanism includes the boom 3, the A-frame 4 and the slewing mechanism 2, the load-bearing components include the bearings of the slewing mechanism 2, the bottom and fixings of the base 1, the output end of the power system, the wire rope of the lifting mechanism 5 and the wire rope of the luffing mechanism 6, the key components include the slewing mechanism 2, the power system, the lifting mechanism 5 and the luffing mechanism 6, and the rotating components include the bearings of the slewing mechanism 2 and the hinges of the lifting mechanism 5.

[0038] Among them, the PLC controller is also used to determine whether the filtered digital signal exceeds the safety range. If so, the relay is controlled to connect so that the sound player plays an alarm sound, if not, the status quo is maintained. Specifically, it includes: determining whether the real-time stress data of the metal structure exceeds the corresponding preset stress safety threshold. If so, the relay is controlled to connect so that the sound player plays an alarm sound, if not, the status quo is maintained; determining whether the real-time force data of the load-bearing component exceeds the corresponding preset force safety threshold. If so, the relay is controlled to connect so that the sound player plays an alarm sound, if not, the status quo is maintained; determining whether the real-time vibration data of the key component is the same as the corresponding preset resonance frequency. If so, the relay is controlled to connect so that the sound player plays an alarm sound, if not, the status quo is maintained.

[0039] The real-time transmission marine crane mechanical safety monitoring device described in this embodiment monitors data in real time through the sensor components arranged on the marine crane, and obtains the corresponding stress, force, vibration, angle and other data after filtering and PLC controller conversion. These data reflect the working status of the corresponding position of the sensor. By comparing these monitoring data with the safety thresholds set in advance, it can be determined whether the marine crane is in a safe working state. These safety thresholds can be limit data selected after test detection to ensure the safe operation of the marine crane, or they can be related safety limit data calculated by model.

[0040] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Those skilled in the art can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A real-time transmission marine crane mechanical safety monitoring device, characterized in that: The device includes a sensor assembly, a data acquisition card, a digital filter, a PLC controller, a display, a relay, a sound player and a power supply; The sensor assembly is installed on the marine crane; the input end of the data acquisition card is connected to the sensor component, and the output end thereof is connected to the input end of the digital filter; the output end of the digital filter is connected to the input end of the PLC controller; the input end of the display and the relay are respectively connected to the output end of the PLC controller; the relay is also connected to the sound player, and the power supply provides power to the entire device through the power circuit; The sensor assembly includes a stress sensor, a force sensor, a vibration sensor, an angle sensor and a distance sensor; the stress sensor is installed on the metal structure of the marine crane, and is used to obtain the stress data of the metal structure at the corresponding position in real time, and transmit it to the data acquisition card; the force sensor is installed on the load-bearing component of the marine crane, and is used to obtain the force data of the load-bearing structure at the corresponding position in real time, and transmit it to the data acquisition card; the vibration sensor is installed on the key component of the marine crane, and is used to obtain the vibration data of the key component at the corresponding position in real time, and transmit it to the data acquisition card; the angle sensor is installed on the rotating component of the marine crane, and is used to obtain the angle data of the rotating component at the corresponding position in real time, and transmit it to the data acquisition card; The data acquisition card is used to collect data signals from different sensor components, convert the data signals into digital signals, and transmit the digital signals to the digital filter; The digital filter is used to filter the digital signal transmitted by the data acquisition card and then transmit it to the PLC controller; After receiving the digital signal transmitted by the digital filter, the PLC controller converts the digital signal into corresponding data information; it is also used to transmit the data information to the display for display; it is also used to determine whether the data information exceeds the safety range, if so, control the relay to connect, so that the sound player plays the alarm sound, if not, keep the status quo; The display is used to display data information transmitted by the PLC controller; The relay is used to connect or disconnect under the control of the PLC controller; The sound player is used to play the alarm sound when the relay is connected; The power supply is used to provide electric power.

2. The real-time transmission marine crane machinery safety monitoring device according to claim 1 is characterized in that: The marine crane comprises a base, a slewing mechanism, a boom, an A-frame, a lifting mechanism, a luffing mechanism and a power system.

3. The real-time transmission marine crane machinery safety monitoring device according to claim 2 is characterized in that: The metal structure comprises a suspension arm, an A-frame and a slewing mechanism.

4. The real-time transmission marine crane machinery safety monitoring device according to claim 2 is characterized in that: The load-bearing components include bearings of the slewing mechanism, a base bottom and fixing parts, an output end of the power system, a steel wire rope of the lifting mechanism and a steel wire rope of the luffing mechanism.

5. The real-time transmission marine crane machinery safety monitoring device according to claim 2 is characterized in that: The key components include a slewing mechanism, a power system, a lifting mechanism and a luffing mechanism.

6. The real-time transmission marine crane machinery safety monitoring device according to claim 2 is characterized in that: The rotating parts include bearings of the slewing mechanism and hinges of the lifting mechanism.

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