CN-116081481-B - Portal crane running state monitoring method and monitoring system

CN116081481BCN 116081481 BCN116081481 BCN 116081481BCN-116081481-B

Abstract

The application discloses a monitoring method and a monitoring system for the running state of a gantry crane, wherein the method comprises the steps of obtaining loaded data, stress data and mid-span deflection of a beam of the gantry crane; the method comprises the steps of determining the maximum combined stress of a beam unit of the gantry crane and the displacement value of a node of the beam unit according to loaded data, carrying out running state early warning on the gantry crane according to the loaded data, stress data and cross beam midspan deflection, generating a maximum combined stress cloud picture according to the maximum combined stress, generating a gantry crane deformation cloud picture according to the displacement value, displaying the maximum combined stress cloud picture and the gantry crane deformation cloud picture on a three-dimensional model of the gantry crane, and displaying loaded data and running state early warning information. The comprehensive monitoring of the gantry crane state is realized, the comprehensiveness and reliability of the gantry crane running state early warning are improved, and the running state of the gantry crane can be displayed more intuitively through various information visualizations.

Inventors

WU JUFENG
HU JIXING
ZHAO XUNGANG
LAI XIUWEN
ZHONG JIWEI
WANG BO
ZHOU CHENXU
ZOU LI
Lv shan
SUN ZHOU

Assignees

中铁大桥局集团有限公司
中铁桥研科技有限公司
中铁大桥科学研究院有限公司

Dates

Publication Date: 20260508
Application Date: 20221230

Claims (7)

1. The method for monitoring the running state of the gantry crane is characterized by comprising the following steps of: Acquiring loading data, stress data and cross beam mid-span deflection of the gantry crane; Determining the maximum combined stress of a beam unit of the gantry crane and the displacement value of a node of the beam unit according to the loaded data; Performing running state early warning on the gantry crane according to the loaded data, the stress data and the cross beam mid-span deflection, the maximum combined stress and the displacement value; Generating a maximum combined stress cloud picture according to the maximum combined stress, generating a gantry crane deformation cloud picture according to the displacement value, displaying the maximum combined stress cloud picture and the gantry crane deformation cloud picture on a three-dimensional model of the gantry crane, and displaying the loaded data and the running state early warning information; the method for acquiring the loading data, the stress data and the cross beam mid-span deflection of the gantry crane comprises the following steps: Monitoring a load value of the gantry crane through a side pressure tension sensor arranged on a lifting hook of the gantry crane, and monitoring a loaded position of the gantry crane through a photoelectric encoder arranged on a crown block of the gantry crane; monitoring the stress data through surface strain gauges respectively arranged at the cross beam midspan position of the gantry crane and the middle part of the supporting leg; Monitoring the cross beam mid-span deflection through static leveling instruments respectively arranged at the leftmost end of the cross beam of the gantry crane and the mid-span position of the cross beam; the determining the maximum combined stress of the beam unit of the gantry crane and the displacement value of the node of the beam unit according to the loaded data comprises the following steps: Applying load and boundary conditions to a preset gantry crane finite element model according to the load value and the loaded position; calculating and obtaining the intra-unit force of the beam unit and the displacement value of the node of the beam unit through the gantry crane finite element model; Calculating and obtaining the maximum combined stress of the beam unit according to the intra-unit force of the beam unit; Wherein the in-cell forces of the beam cell include axial forces, bending moments and shear forces.
2. The method for monitoring the running state of the gantry crane according to claim 1, wherein the step of performing the running state early warning of the gantry crane according to the load data, the stress data, the beam mid-span deflection, the maximum combined stress and the displacement value comprises the steps of: When the load value, the stress data and the cross beam mid-span deflection of the gantry crane are higher than the corresponding first threshold values, a first-level early warning signal is sent to perform first-level running state early warning; when the load value, the stress data and the cross beam mid-span deflection of the gantry crane are higher than the corresponding second threshold values, a secondary early warning signal is sent to perform secondary running state early warning; When the load value, the stress data and the cross beam mid-span deflection of the gantry crane are higher than the corresponding third threshold values, a three-level early warning signal is sent to perform three-level operation state early warning; wherein the third threshold is greater than the second threshold, the second threshold being greater than the first threshold.
3. The method of monitoring the operational status of a gantry crane of claim 2, further comprising: When the primary early warning signal, the secondary early warning signal or the tertiary early warning signal is closed, if the operation state early warning level is increased, an early warning signal of a corresponding level is sent out, and if the operation state early warning level is the same or is reduced, the early warning signal is not sent out any more, and information of operation state early warning is stored.
4. The method of monitoring the operational status of a gantry crane of claim 2, further comprising: loading the conditions that the loaded position of the gantry crane is the cross beam midspan position, the rated lifting value of the gantry crane, the dead weight load of the gantry crane, the preset horizontal inertial load and the preset wind load into a preset gantry crane finite element model to obtain first thresholds respectively corresponding to the stress data and the cross beam midspan deflection; Loading the conditions that the loaded position of the gantry crane is the cross beam midspan position, the rated lifting value of the gantry crane, the dead weight load of the gantry crane, the preset horizontal inertial load and the preset wind load into a preset gantry crane finite element model to obtain second thresholds respectively corresponding to the stress data and the cross beam midspan deflection; Loading the conditions that the loaded position of the gantry crane is the cross beam midspan position, the rated lifting value of the gantry crane, the dead weight load of the gantry crane, the preset horizontal inertial load and the preset wind load of the gantry crane into a preset gantry crane finite element model to obtain third thresholds respectively corresponding to the stress data and the cross beam midspan deflection.
5. The method of monitoring the operational status of a gantry crane of claim 4, further comprising: determining whether a third threshold value of the beam mid-span deflection corresponding to the obtained beam mid-span deflection is larger than a preset beam mid-span deflection limit threshold value; If yes, taking a cross beam mid-span deflection limit threshold value of a fourth preset multiple as a cross beam mid-span deflection first threshold value, taking a cross beam mid-span deflection limit threshold value of a fifth preset multiple as a cross beam mid-span deflection second threshold value, and taking the cross beam mid-span deflection limit threshold value as a cross beam mid-span deflection third threshold value, wherein the fifth preset multiple is larger than the fourth preset multiple; wherein, the value of the cross beam mid-span deflection limit threshold is as follows: F is the cross beam mid-span deflection limit threshold, S is the span of the gantry crane, and C is a constant parameter, wherein the constant parameter is valued according to the positioning accuracy of the gantry crane.
6. A monitoring system for the operational status of a gantry crane, comprising: the data acquisition module is used for acquiring loaded data, stress data and cross beam mid-span deflection of the gantry crane; The data calculation module is used for determining the maximum combined stress of the beam unit of the gantry crane and the displacement value of the node of the beam unit according to the loaded data; The state early warning module is used for carrying out operation state early warning on the gantry crane according to the loaded data, the stress data and the cross beam mid-span deflection, the maximum combined stress and the displacement value; The visualization module is used for generating a maximum combined stress cloud image according to the maximum combined stress, generating a gantry crane deformation cloud image according to the displacement value, displaying the maximum combined stress cloud image and the gantry crane deformation cloud image on a three-dimensional model of the gantry crane, and displaying the loaded data and the running state early warning information; Wherein, the data acquisition module includes: the side pressure tension sensor is arranged on the lifting hook of the gantry crane and is used for monitoring the load value of the gantry crane; The photoelectric encoder is arranged on the crown block of the gantry crane and is used for monitoring the loaded position of the gantry crane; the surface strain gauge is respectively arranged at the middle position of the cross beam of the gantry crane and the middle part of the supporting leg and is used for monitoring the stress data; The static leveling instrument is respectively arranged at the leftmost end of the cross beam of the gantry crane and the cross beam midspan position and is used for monitoring the cross beam midspan deflection; wherein the data calculation module is further configured to: Applying load and boundary conditions to a preset gantry crane finite element model according to the load value and the loaded position; calculating and obtaining the intra-unit force of the beam unit and the displacement value of the node of the beam unit through the gantry crane finite element model; Calculating and obtaining the maximum combined stress of the beam unit according to the intra-unit force of the beam unit; Wherein the in-cell forces of the beam cell include axial forces, bending moments and shear forces.
7. The gantry crane operating condition monitoring system of claim 6, further comprising: and the cloud database is used for storing the loaded data, the stress data, the cross beam mid-span deflection, the maximum combined stress of the beam units and the displacement value of the nodes of the beam units.

Description

Portal crane running state monitoring method and monitoring system Technical Field The application relates to the technical field of equipment health monitoring, in particular to a monitoring method and a monitoring system for the running state of a gantry crane. Background Large-scale hoisting mechanical equipment (gantry crane, bridge girder erection machine, cradle and the like) is an indispensable mechanical equipment in bridge construction, and is an operation platform for bridge constructors and machines. In the bridge construction process, all loads such as constructors, machines and tools, the weight of the beam Duan Hunning soil and the like are borne by large-scale hoisting equipment, and the safety of the constructors, the machines and the bridge structure can be ensured only by ensuring the stability and the safety of the large-scale hoisting equipment. Therefore, early warning is needed in the operation process of the hoisting mechanical equipment when the running state, the working state and the structural state of the hoisting mechanical equipment are abnormal, and safety personnel and operators are prompted to take countermeasures so as to ensure the safety of the mechanical equipment, the bridge structure and constructors. In the related art, when monitoring the state of large hoisting equipment such as a gantry crane, whether early warning is performed is judged only by sensor data arranged at key stress parts of the gantry crane equipment, the problem that early warning stress measuring points are insufficient and incomplete exists, and damage of partial stress or deformation sensors has decisive influence on early warning reliability, so that the early warning reliability is low. Therefore, how to comprehensively monitor the state of the gantry crane and improve the reliability of safety precaution is a technical problem to be solved. Disclosure of Invention The application mainly aims to provide a method and a system for monitoring the running state of a gantry crane, and aims to solve the technical problems that whether the state of the gantry crane is insufficient and not comprehensive is caused by judging whether to pre-warn only through sensor data arranged at key stress parts of gantry crane equipment in the prior art. In a first aspect, the present application provides a method for monitoring an operation state of a gantry crane, the method comprising the steps of: Acquiring loading data, stress data and cross beam mid-span deflection of the gantry crane; Determining the maximum combined stress of a beam unit of the gantry crane and the displacement value of a node of the beam unit according to the loaded data; Performing running state early warning on the gantry crane according to the loaded data, the stress data and the cross beam mid-span deflection, the maximum combined stress and the displacement value; generating a maximum combined stress cloud picture according to the maximum combined stress, generating a gantry crane deformation cloud picture according to the displacement value, displaying the maximum combined stress cloud picture and the gantry crane deformation cloud picture on a three-dimensional model of the gantry crane, and displaying the loaded data and the running state early warning information. In some embodiments, the acquiring load data, stress data, and beam mid-span deflection of the gantry crane includes: Monitoring a load value of the gantry crane through a side pressure tension sensor arranged on a lifting hook of the gantry crane, and monitoring a loaded position of the gantry crane through a photoelectric encoder arranged on a crown block of the gantry crane; monitoring the stress data through surface strain gauges respectively arranged at the cross beam midspan position of the gantry crane and the middle part of the supporting leg; and monitoring the beam midspan deflection through a static level gauge respectively arranged at the leftmost end of the beam of the gantry crane and the midspan position of the beam. In some embodiments, the determining the maximum combined stress of the beam unit of the gantry crane and the displacement value of the node of the beam unit according to the loaded data includes: Applying load and boundary conditions to a preset gantry crane finite element model according to the load value and the loaded position; calculating and obtaining the intra-unit force of the beam unit and the displacement value of the node of the beam unit through the gantry crane finite element model; Calculating and obtaining the maximum combined stress of the beam unit according to the intra-unit force of the beam unit; Wherein the in-cell forces of the beam cell include axial forces, bending moments and shear forces. In some embodiments, the performing the operation state early warning of the gantry crane according to the load data, the stress data, the beam mid-span deflection, the maximum combined stress and the displacement value includes: When