CN114057107A - Rope breakage detection system and method for lifting opening and closing mechanism of grab ship unloader - Google Patents
Rope breakage detection system and method for lifting opening and closing mechanism of grab ship unloader Download PDFInfo
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- CN114057107A CN114057107A CN202111413658.1A CN202111413658A CN114057107A CN 114057107 A CN114057107 A CN 114057107A CN 202111413658 A CN202111413658 A CN 202111413658A CN 114057107 A CN114057107 A CN 114057107A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/16—Applications of indicating, registering, or weighing devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/48—Automatic control of crane drives for producing a single or repeated working cycle; Programme control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C15/00—Safety gear
- B66C15/06—Arrangements or use of warning devices
- B66C15/065—Arrangements or use of warning devices electrical
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C3/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith and intended primarily for transmitting lifting forces to loose materials; Grabs
- B66C3/12—Grabs actuated by two or more ropes
- B66C3/125—Devices for control
Abstract
The invention provides a rope breakage detection system and method for a lifting opening and closing mechanism of a grab ship unloader, wherein the system comprises the following components: the steel wire rope state detection unit is arranged in the main trolley area of the grab ship unloader and is used for detecting the running states of lifting, opening and closing steel wire ropes and the running state of a main pulley on the trolley in real time; the winding drum running state detection unit is arranged at the end part of a hoisting winding drum in the machine room and used for detecting the running state of the steel wire rope winding drum; the main PLC control unit is arranged in the PLC room and used for receiving state data detected by the steel wire rope state detection unit and the winding drum running state detection unit and giving a rope breakage fault alarm based on the state data; and the steel wire rope state detection unit and the winding drum running state detection unit are respectively connected with the main PLC control unit through buses.
Description
Technical Field
The invention relates to the field of bulk cargo wharf grab ship unloader equipment, in particular to a system and a method for detecting rope breakage of a lifting opening and closing mechanism of a grab ship unloader.
Background
The lifting and opening and closing mechanisms of the grab ship unloader are the two most important operating mechanisms, the loss of the steel wire rope is the most serious, and the average service life of the lifting and opening and closing steel wire rope is about 300 ten thousand tons of materials in operation by taking the grab ship unloader of 2000t/h as an example. In case of rope breakage, equipment can be stopped, and risks such as out-of-control collision of the grab bucket and the like can be generated. At present, the broken rope detection of the lifting and opening and closing steel wire ropes generally adopts a manual inspection mode to detect, and the efficiency is low. Therefore, a reliable rope breakage online detection system for a lifting opening and closing mechanism of the grab ship unloader is urgently needed to ensure the safety and reliability of the operation of the grab ship unloader.
Disclosure of Invention
In view of the defects of the prior art, the invention provides a system and a method for detecting broken ropes of a lifting opening and closing mechanism of a grab ship unloader.
The technical means adopted by the invention are as follows:
the utility model provides a grab ship unloaders plays to rise switching mechanism and restricts detecting system absolutely, includes:
the steel wire rope state detection unit is arranged in the main trolley area of the grab ship unloader and is used for detecting whether a steel wire rope is lifted and opened and closed to run in a pulley groove or not and the running rotating speed of a main pulley on the trolley in real time;
the winding drum running state detection unit is arranged at the end part of a hoisting winding drum in the machine room and used for detecting the running rotating speed of the steel wire rope winding drum;
the main PLC control unit is arranged in the PLC room and used for receiving state data detected by the steel wire rope state detection unit and the winding drum running state detection unit and giving a rope breakage fault alarm based on the state data;
and the steel wire rope state detection unit and the winding drum running state detection unit are respectively connected with the main PLC control unit through buses.
Further, the steel wire rope state detection unit comprises an ultrasonic sensor, an RFID detection device, an encoding disc, a communication module, a DI module, a wireless transmission device and a storage battery;
the ultrasonic sensor is arranged at a main pulley rope groove on the main trolley frame and used for detecting whether a lifting and opening-closing steel wire rope runs in the pulley rope groove or not;
the RFID detection device is arranged on the side wall of the main pulley on the main trolley frame, the coding disc of the RFID detection device is arranged around the side wall of the main pulley for one circle, and the RFID detection device is used for measuring the rotating speed of the main pulley by reading the data of the coding disc of the RFID detection device in the rotating process of the main pulley;
the communication module is arranged in an electric cabinet on the main trolley frame and used for receiving the measured data of the RFID detection device;
the DI module is arranged in an electric cabinet on the main trolley frame and is used for receiving data of the ultrasonic sensor;
the wireless transmission device is arranged in an electric cabinet on the main trolley frame and is used for realizing data communication with the main PLC control unit;
the storage battery is arranged in an electric cabinet on the main trolley frame and used for supplying power to the electric elements.
Further, the drum running state detection unit comprises four sets of absolute value encoders and mounting supports thereof, wherein the four sets of absolute value encoders are respectively a lifting sea side drum absolute value encoder, a lifting land side drum absolute value encoder, an opening and closing sea side drum absolute value encoder and an opening and closing land side drum absolute value encoder.
Further, the main PLC control unit comprises a PLC module, a communication module and a wireless receiving device.
A rope breakage detection method for a lifting opening and closing mechanism of a grab ship unloader is realized based on any one of the rope breakage detection systems for the lifting opening and closing mechanism of the grab ship unloader, and comprises the following steps:
s1, controlling the rope breakage detection system of the lifting opening and closing mechanism to synchronously operate with the grab ship unloader;
s2, the main PLC control unit respectively receives and analyzes the detection data of the steel wire rope breakage detection unit and the drum running state detection unit, and the method comprises the following steps:
the main PLC control unit detects signals of four groups of ultrasonic sensors in the steel wire rope breakage detection unit in real time, when any group of ultrasonic sensor signals changes, the ultrasonic sensors are drawn out after being judged that the steel wire rope is broken, a rope breakage fault alarm is sent immediately, and the corresponding main mechanism is interrupted in time;
the main PLC control unit receives real-time data of four groups of RFID detection devices in the steel wire rope state detection unit and four groups of absolute value encoders in the winding drum running state detection unit at the same time, and converts and contrasts the data of the four groups of RFID detection devices and the data of the four groups of absolute value encoders, and once the fact that the ratio of the main pulley running speed fed back by the RFID to the winding drum running speed fed back by the absolute value encoders is lower than a set threshold value is found, the phenomenon that the steel wire rope is broken is judged, a rope breaking fault alarm is immediately sent out, and the running of a corresponding main mechanism is interrupted in time.
Further, once the ratio of the main pulley running speed fed back by the RFID and the drum running speed fed back by the absolute value encoder is found to be lower than a set threshold, the phenomenon of rope breakage of the steel wire rope is judged, a rope breakage fault alarm is immediately sent out, and the corresponding main mechanism is interrupted in time to run, and the method comprises the following steps:
judging the steel wire rope to be in a normal state according to the following formula:
K0<(R01*Ω01)/(R00*Ω00)<100％；
judging the steel wire rope to be in a broken state according to the following formula:
(R01*Ω01)/(R00*Ω00)<＝K0；
wherein R is01Is the radius of a main pulley on the trolley, omega01Angular velocity of main pulley, R, fed back by RFID detection device00Radius of wire rope reel in machine room, omega00Angular speed of travel of the drum, K, detected by absolute encoders0And when the calculated ratio is smaller than the rope breaking fault warning threshold value, judging that the main pulley cannot rotate along with the winding drum due to the rope breaking fault, and sending a rope breaking fault warning signal.
Compared with the prior art, the invention has the following advantages:
1. the invention is applied to bulk cargo wharf grab ship unloader equipment, detects the running states of lifting and opening and closing steel wire ropes in a mode of configuring an ultrasonic sensor, an RFID detection device and an encoder, and sends out a fault alarm signal once a rope breaking fault occurs, thereby realizing the function of rope breaking detection of a lifting and opening and closing mechanism of the grab ship unloader.
2. The invention adopts an automatic detection mode to replace manual inspection, improves the detection efficiency, has stable and reliable detection function, and improves the safety and the practicability of equipment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a rope breakage detection system of a lifting opening and closing mechanism.
FIG. 2 is a circuit connection diagram of a wire rope breakage detection unit according to the present invention.
Fig. 3 is a circuit connection diagram of the detection unit for detecting the operation state of the winding drum according to the present invention.
Fig. 4 is a circuit connection diagram of the main PLC control unit according to the present invention.
Fig. 5 is a layout diagram of a detection device of the rope breakage detection system of the hoisting opening and closing mechanism.
Fig. 6 is a control flow chart of the rope breakage detection device of the hoisting opening and closing mechanism.
Reference numerals: 1. a wire rope breakage detection unit; 101. an ultrasonic sensor; 102. an RFID detection device and a code disc; 103. a communication module; 104. a DI module; 105. a wireless transmission device; 106. a storage battery; 2. a main PLC control unit; 201. a PLC; 202. a DP communication module; 203. a wireless receiving device; 3. a drum running state detection unit; 301. lifting sea side drum absolute value encoder; 302. lifting land side reel absolute value encoder, 303, opening and closing sea side reel absolute value encoder; 304. opening and closing land side drum absolute value encoders; a01, opening and closing the steel wire rope 1; a02, lifting a steel wire rope 1; a03, opening and closing pulley; a04, a lifting pulley; a05, ultrasonic sensor; a06, a main trolley; a07, opening and closing the steel wire rope 2; a08, lifting a steel wire rope 2; a09, an electric cabinet; a10, an RFID detection device and an encoder; a11, machine room opening and closing drum; a12, a machine room lifting reel; a13, absolute value encoder; a14, grab bucket.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the invention provides a rope breakage detection system for a lifting opening and closing mechanism of a grab ship unloader, which comprises a steel wire rope state detection unit, a winding drum running state detection unit and a main PLC control unit. The steel wire rope state detection unit is arranged in the main trolley area of the grab ship unloader and used for detecting the running states of the lifting and opening and closing steel wire ropes and the running state of a main pulley on the trolley in real time, namely detecting the running of the lifting and opening and closing steel wire ropes in a pulley groove in real time and detecting the running rotating speed of the main pulley. The winding drum running state detection unit is arranged at the end part of a hoisting winding drum and an opening and closing winding drum in the machine room and used for detecting the running state of the steel wire rope winding drum, namely detecting the running speed of the winding drum. The main PLC control unit is arranged in the PLC room and used for collecting data, performing algorithm analysis and giving a rope breakage fault alarm in time. The steel wire rope state detection unit consists of an ultrasonic sensor, an RFID detection device, a coding disc, a communication module, a DI module, a wireless transmission device and a storage battery. The drum running state detection unit consists of four groups of absolute value encoders and mounting brackets thereof. The main PLC control unit consists of a PLC module, a communication module and a wireless receiving device. The steel wire rope state detection unit, the reel running state detection unit and the main PLC control unit are connected through a Profibus DP bus.
The invention also provides a rope breakage detection method of the hoisting opening and closing mechanism of the grab ship unloader, which is realized based on the rope breakage detection system of the hoisting opening and closing mechanism, and comprises the following steps:
and S1, when an operator operates the grab ship unloader at the cab linkage table, the rope breakage detection function of the lifting opening and closing mechanism is automatically activated.
And S2, after receiving the rope breakage detection function activation instruction of the lifting opening and closing mechanism, the main PLC control unit sequentially receives and analyzes the detection data of the steel wire rope breakage detection unit and the winding drum running state detection unit. The method specifically comprises the following steps:
s201, the main PLC control unit detects signals of four groups of ultrasonic sensors in the steel wire rope breakage detection unit in real time, once the signals change, the signals are extracted after the steel wire rope is judged to be broken, a rope breakage fault alarm is sent out immediately, and the corresponding main mechanism is interrupted in time.
S202, the main PLC control unit simultaneously receives real-time data of four groups of RFID detection devices in the steel wire rope state detection unit and four groups of absolute value encoders in the winding drum running state detection unit, data of the four groups of RFID detection devices and the four groups of absolute value encoders are converted, compared and analyzed, once the fact that the ratio of the main pulley running speed fed back by the RFID to the winding drum running speed fed back by the absolute value encoders is lower than a set threshold value is found, the phenomenon that the steel wire rope is broken is judged, a rope breaking fault alarm is immediately sent out, and running of a corresponding main mechanism is interrupted in time. The specific judgment formula is as follows:
the steel wire rope normal state judgment formula is as follows: k0< (R01 Ω 01)/(R00 Ω 00) < 100%;
the formula for judging the broken state of the steel wire rope is as follows: (R01 × Ω 01)/(R00 × Ω 00) < K0;
wherein R01 is radius of a main pulley on the trolley, omega 01 is running angular speed of the main pulley fed back by the RFID detection device, R00 is radius of a steel wire rope winding drum in a machine room, omega 00 is running angular speed of the winding drum detected by an absolute value encoder, K0 is a broken rope fault alarm threshold value, when the calculated ratio is smaller than the broken rope fault alarm threshold value, the main pulley is judged to be incapable of rotating along with the winding drum due to broken rope fault, and a broken rope fault alarm signal is sent.
And S3, detecting by the main PLC control unit in real time in the operation process of the grab ship unloader in the detection mode of S2 until the ship unloader is unloaded, so as to realize the rope breakage detection function of the lifting opening and closing mechanism and ensure the safe and stable operation of equipment.
The scheme and effect of the present invention will be further explained by specific application examples.
The rope breakage detection system of the lifting opening and closing mechanism of the grab ship unloader is shown in figure 1 and comprises a steel wire rope breakage detection unit 1, a main PLC control unit 2 and a reel running state detection unit 3.
The wire rope breakage detection unit 1 is composed of an ultrasonic sensor 101, an RFID detection device and code disc 102, a communication module 103, a DI module 104, a wireless transmission device 105 and a storage battery 106, wherein the ultrasonic sensor 101, the RFID detection device and the code disc 102 are installed on a main trolley. The ultrasonic sensor data 101 is accessed to the DI module 104, the RFID detection device 102 is accessed to the communication module 103, the detection data in the unit are collected and then transmitted to the main PLC control unit 2 in a wireless mode by adopting a Profibus DP bus protocol, and the specific connection mode is shown in figure 2.
The drum running state detection unit 3 is composed of four sets of absolute value encoder devices which are installed in a machine room to lift and open and close the end part of the drum, data of the absolute value encoder devices are transmitted to the main PLC control unit 2 through a Profibus DP bus cable by adopting a Profibus DP bus protocol, and the specific connection mode is shown in figure 3.
The main PLC control unit 2 is composed of a PLC201, a DP communication module 202, and a wireless receiving device 203 installed in the PLC room. The PLC201 is used for controlling the rope breaking detection function of the lifting opening and closing mechanism, the DP communication module 202 and the wireless receiving device 203 are used for Profibus DP protocol data communication of the PLC, the steel wire rope breaking detection unit U1 and the winding drum running state detection unit U2, and the specific wiring mode is shown in figure 4.
After the rope breakage detection function of the hoisting opening and closing mechanism is activated, the main PLC control unit 2 receives and analyzes detection data of the steel wire rope breakage detection unit 1 and the winding drum running state detection unit 3 in sequence. When the signal of the ultrasonic sensor changes, the main pulley runs abnormally relative to the running of the winding drum and the like, the main PLC control unit sends out a rope breaking fault alarm to interrupt the action of the main mechanism in time, so that the occurrence of the accident of out-of-control collision of the grab bucket is avoided.
The technology can realize the rope breakage detection function of the lifting opening and closing mechanism of the grab ship unloader, send out the rope breakage fault alarm in time and ensure the safe and stable operation of equipment. The intelligent level of equipment is improved, and the labor intensity of operators and wharf operation maintenance personnel is reduced to a certain extent.
As shown in fig. 5, which is a schematic diagram of the arrangement position of the device, it can be seen that the ultrasonic sensor is mounted near a main pulley rope groove on the main trolley frame and used for detecting whether a hoisting and opening/closing steel wire rope runs in the pulley rope groove. The RFID detection device is arranged near the side wall of the main pulley on the main trolley frame, the coding disc of the RFID detection device is arranged around the side wall of the main pulley for one circle, and the RFID detection device is used for measuring the rotating speed of the main pulley by reading the data of the coding disc of the RFID detection device in the rotating process of the main pulley. In addition, the communication module is arranged in an electric cabinet on the main trolley frame and used for receiving data of the RFID detection device. The DI module is arranged in an electric cabinet on the main trolley frame and is used for receiving the data of the ultrasonic sensor. The wireless transmission device is arranged in an electric cabinet on the main trolley frame and is used for realizing data communication with the main PLC control unit. The storage battery is arranged in an electric cabinet on the main trolley frame and used for supplying power to the electric elements.
The rope breakage detection function of the hoisting opening and closing mechanism will be described by taking a grab ship unloader with double front rope outlets as an example. The control flow is shown in FIG. 6: after the rope breakage detection function of the hoisting opening and closing mechanism of the grab ship unloader is activated, the main PLC control unit carries out real-time detection on signals of four groups of ultrasonic sensors in the steel wire rope breakage detection unit, if the signals change, the signals are extracted after the steel wire rope is judged to be broken, a rope breakage fault alarm is immediately sent out, the corresponding main mechanism is interrupted in time, and the occurrence of the accident of out-of-control collision of the grab bucket is avoided. If the ultrasonic sensor signal is normal, the main PLC control unit further detects the data of four groups of RFID detection devices in the steel wire rope state detection unit and four groups of absolute value encoders in the winding drum running state detection unit in real time, converts and contrasts the data of the four groups of RFID detection devices and the data of the four groups of absolute value encoders, judges that the steel wire rope is broken once the ratio of the main pulley running speed fed back by the RFID to the winding drum running speed fed back by the absolute value encoders is lower than a set threshold value, immediately sends a rope breaking fault alarm, and timely interrupts the running of the corresponding main mechanism. If the detection results are not abnormal, the main PLC control unit repeatedly performs the detection until the ship unloading operation of the grab ship unloader is completed.
The rope breakage detection system and method for the lifting opening and closing mechanism of the grab ship unloader provided by the invention can realize quick detection of the rope breakage fault of the lifting opening and closing steel wire rope, greatly enhance the operation safety of the grab ship unloader and save a large amount of cost required by manual inspection for a wharf.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. The utility model provides a grab ship unloaders plays to rise switching mechanism and restricts detecting system absolutely which characterized in that includes:
the steel wire rope state detection unit is arranged in the main trolley area of the grab ship unloader and is used for detecting whether a steel wire rope is lifted and opened and closed to run in a pulley groove or not and the running rotating speed of a main pulley on the trolley in real time;
the winding drum running state detection unit is arranged at the end part of a hoisting winding drum in the machine room and used for detecting the running rotating speed of the steel wire rope winding drum;
the main PLC control unit is arranged in the PLC room and used for receiving state data detected by the steel wire rope state detection unit and the winding drum running state detection unit and giving a rope breakage fault alarm based on the state data;
and the steel wire rope state detection unit and the winding drum running state detection unit are respectively connected with the main PLC control unit through buses.
2. The rope breakage detection system for the hoisting opening and closing mechanism of the grab ship unloader as recited in claim 1, wherein the steel wire rope state detection unit comprises an ultrasonic sensor, an RFID detection device, an encoding disc, a communication module, a DI module, a wireless transmission device and a storage battery;
the ultrasonic sensor is arranged at a main pulley rope groove on the main trolley frame and used for detecting whether a lifting and opening-closing steel wire rope runs in the pulley rope groove or not;
the RFID detection device is arranged on the side wall of the main pulley on the main trolley frame, the coding disc of the RFID detection device is arranged around the side wall of the main pulley for one circle, and the RFID detection device is used for measuring the rotating speed of the main pulley by reading the data of the coding disc of the RFID detection device in the rotating process of the main pulley;
the communication module is arranged in an electric cabinet on the main trolley frame and used for receiving the measured data of the RFID detection device;
the DI module is arranged in an electric cabinet on the main trolley frame and is used for receiving data of the ultrasonic sensor;
the wireless transmission device is arranged in an electric cabinet on the main trolley frame and is used for realizing data communication with the main PLC control unit;
the storage battery is arranged in an electric cabinet on the main trolley frame and used for supplying power to the electric elements.
3. The rope breakage detection system for the hoisting opening and closing mechanism of the grab ship unloader according to claim 1, wherein the drum operation state detection unit comprises four sets of absolute value encoders and mounting brackets thereof, wherein the four sets of absolute value encoders are a hoisting sea side drum absolute value encoder, a hoisting land side drum absolute value encoder, an opening and closing sea side drum absolute value encoder and an opening and closing land side drum absolute value encoder respectively.
4. The rope breakage detection system for the hoisting opening and closing mechanism of the grab ship unloader according to claim 1, wherein the main PLC control unit comprises a PLC module, a communication module and a wireless receiving device.
5. A rope breakage detection method for a hoisting opening and closing mechanism of a grab ship unloader is characterized by being realized based on the rope breakage detection system for the hoisting opening and closing mechanism of the grab ship unloader, which comprises the following steps:
s1, controlling the rope breakage detection system of the lifting opening and closing mechanism to synchronously operate with the grab ship unloader;
s2, the main PLC control unit respectively receives and analyzes the detection data of the steel wire rope breakage detection unit and the drum running state detection unit, and the method comprises the following steps:
the main PLC control unit detects signals of four groups of ultrasonic sensors in the steel wire rope breakage detection unit in real time, when any group of ultrasonic sensor signals changes, the ultrasonic sensors are drawn out after being judged that the steel wire rope is broken, a rope breakage fault alarm is sent immediately, and the corresponding main mechanism is interrupted in time;
the main PLC control unit receives real-time data of four groups of RFID detection devices in the steel wire rope state detection unit and four groups of absolute value encoders in the winding drum running state detection unit at the same time, and converts and contrasts the data of the four groups of RFID detection devices and the data of the four groups of absolute value encoders, and once the fact that the ratio of the main pulley running speed fed back by the RFID to the winding drum running speed fed back by the absolute value encoders is lower than a set threshold value is found, the phenomenon that the steel wire rope is broken is judged, a rope breaking fault alarm is immediately sent out, and the running of a corresponding main mechanism is interrupted in time.
6. The method for detecting the rope breakage of the hoisting opening and closing mechanism of the grab ship unloader according to claim 5, wherein once the fact that the ratio of the main pulley running speed fed back by the RFID to the winding drum running speed fed back by the absolute value encoder is lower than a set threshold is found, the rope breakage phenomenon of the steel wire rope is judged, a rope breakage fault alarm is immediately sent out, and the operation of the corresponding main mechanism is timely interrupted, and the method comprises the following steps:
judging the steel wire rope to be in a normal state according to the following formula:
K0<(R01*Ω01)/(R00*Ω00)<100％；
judging the steel wire rope to be in a broken state according to the following formula:
(R01*Ω01)/(R00*Ω00)<＝K0；
wherein R is01Is the radius of a main pulley on the trolley, omega01Angular velocity of main pulley, R, fed back by RFID detection device00Radius of wire rope reel in machine room, omega00Angular speed of travel of the drum, K, detected by absolute encoders0When the calculated ratio is smaller than the rope breakage fault alarm threshold value, the main pulley is judged to be unable to follow the rope breakage faultAnd the rope-breaking fault alarm signal is sent out along with the rotation of the winding drum.
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| CN111533019A (en) * | 2020-05-09 | 2020-08-14 | 福建恒安集团有限公司 | Electric control winch control system and control method thereof |
| CN111675106A (en) * | 2020-07-31 | 2020-09-18 | 山东省科学院海洋仪器仪表研究所 | Intelligent grab bucket system based on Internet of things and monitoring method |
| CN214668769U (en) * | 2021-04-22 | 2021-11-09 | 洛阳威尔若普检测技术有限公司 | Port hoisting equipment wire rope detection device |
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2021
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| CN104909275A (en) * | 2015-06-12 | 2015-09-16 | 华电重工股份有限公司 | Method and system for intelligently reducing speed of grab bucket/carrier loader and lifting-switching mechanism |
| CN104909273A (en) * | 2015-06-12 | 2015-09-16 | 华电重工股份有限公司 | Grab ship unloader as well as driving method and device of grab ship unloader |
| JP2018083713A (en) * | 2016-11-25 | 2018-05-31 | 株式会社タダノ | Irregular winding preventing device for winch and crane |
| CN111533019A (en) * | 2020-05-09 | 2020-08-14 | 福建恒安集团有限公司 | Electric control winch control system and control method thereof |
| CN111675106A (en) * | 2020-07-31 | 2020-09-18 | 山东省科学院海洋仪器仪表研究所 | Intelligent grab bucket system based on Internet of things and monitoring method |
| CN214668769U (en) * | 2021-04-22 | 2021-11-09 | 洛阳威尔若普检测技术有限公司 | Port hoisting equipment wire rope detection device |
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| CN114057107B (en) | 2023-11-28 |
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