CN101852009A - Guide rail type attached lifting scaffold monitoring system - Google Patents

Abstract

The invention is a guide rail type attached lifting scaffold monitoring system, the control host includes PLC and memory, input and output modules and sound/light alarm device. The lifting tension monitoring subsystem includes the analysis and comparison software of the control host, the allowable value of the cable tension, the alarm value, etc., and multiple sets of tension sensor components installed on the cable at each lifting point. The components are integrated strain gauges, current transducers, and amplifying circuits. Its output signal is connected to the control host. The control host analyzes and compares the tension signals of each lifting point, and if it exceeds the alarm value, it will alarm and stop. The synchronous adjustment subsystem has multiple sets of rotary encoders and frequency conversion controllers installed on each motor. The control host controls the frequency conversion controller to adjust the speed of each motor according to the speed signal to ensure that each lifting point is lifted and lowered synchronously. Multiple sets of cameras can remotely observe the lifting situation in real time. The stroke protection device on the guide rail realizes unmanned safety control. The control host is connected to the computer to input and output the system data. The system monitors multiple points in real time at the same time, and the processing is timely and accurate.

Description

Guide rail type attached lifting scaffold monitoring system

(1) Technical field

The invention relates to the technical field of lifting scaffolds for high-rise and super high-rise building construction, in particular to a monitoring system for guide rail-type attached lifting scaffolds.

(2) Background technology

At present, the guide rail type attached lifting scaffold has been widely used in the construction of high-rise and super high-rise buildings. This kind of lifting scaffold mainly includes three parts: frame structure, attached load-bearing structure and control system. The frame structure includes the vertical main frame, horizontal bottom truss and connectors; the attached load-bearing structure includes load-bearing beams, guiding systems, anti-fall systems, etc.; the control system includes strong and weak current systems controlled by computers. The attached support structure is fixed on the load-bearing components of the building, and the frame structure is reliably attached to the load-bearing components of the building through the attached load-bearing structure, and is constrained by the guiding system to realize lifting. The jack is installed on the load-bearing beam and connected with the frame structure. Various loads in the working process of the jack are transferred to the load-bearing beam through the frame structure, and finally transmitted to the load-bearing components of the building. This guide rail type attached lifting scaffold has the advantages of fast installation, wide application range, simple operation, less scaffold material and energy consumption, etc.

Since this equipment is a special high-risk construction machinery and equipment, it must be equipped with anti-falling and anti-tilting devices to ensure safe operation. Due to the complexity of the overall load change during the high-altitude lifting process, the application of intelligent multi-lift point balance control system has become an inevitable trend. . For example, Shanghai No.8 Construction Engineering Co., Ltd. applied for a utility model patent in 1997, "Integral Electric Lifting Scaffold that Can Monitor Loads in Sections". It is equipped with a tension sensor on the electric hoist of each lifting point, which is connected with the load control module, and each load control module is connected with the controller, and the controller controls the alarm of the whole system. Since the original tension signal collected by the tension sensor is very weak, the transmission distance is limited, and the signal must be amplified before it can be accurately and instantly input to the computer processing center from each lifting point.

Due to adverse factors such as dust, humidity, and interference in the construction environment, the current computer intelligent control system is severely limited in practice. The main reasons include:

1. The control platform is affected by unfavorable factors on site, the overall operation of the system and supporting facilities is unstable, and the anti-interference and anti-corrosion measures are not perfect;

2. In information transmission systems such as sling tension, video, and electric triggering, the integration of external equipment is low, and the installation process is complicated due to its own structure, which does not adapt to the operating rhythm of the modern construction industry;

3. At present, the cost of the equipment is too much considered. In order to ensure the synchronous operation of multiple lifting points, it is still difficult to realize the synchronization of the operation of each lifting point by simply selecting the same brand and the same specification and model of the hoist without control means;

4. The system has high requirements on the technical level and experience of the user.

In short, the current domestic practical safety monitoring system for guide rail attached lifting scaffolds urgently needs to be improved in terms of hardware and software.

(3) Contents of the invention

The purpose of the present invention is to disclose a guide rail type attached scaffold monitoring system, which includes intelligent real-time monitoring of the tension of the steel cables at each lifting point and the synchronous lifting, so as to ensure the low energy consumption, high efficiency and safety of the lifting scaffold construction in the high-altitude environment .

The guide rail type attached lifting scaffold monitoring system designed by the present invention is a monitoring system installed on a guide rail type attached scaffold including a frame structure and an attached load-bearing structure. The monitoring system includes a control host and strong and weak current control facilities connected thereto, and the control host It includes a programmable controller and a memory connected thereto, an input module, an output module and an audible/optical alarm device, and the output module is connected to strong and weak current control elements and an audible/optical alarm device. The monitoring system includes a lifting tension monitoring subsystem, which includes the relevant analysis and comparison software stored in the programmable controller of the control host, the allowable value of steel cable tension stored in the memory, the allowable value of synchronization error, Alarm value, emergency stop value, etc., as well as 1 to 40 sets of tension sensing components installed on the steel cables of each lifting point, the output ends of each tension sensing component are connected to the input module of the control host through signal lines. Each tension sensing component includes a tension signal acquisition device, a current transmitter, and an amplifying circuit. The output of the tension signal acquisition device is connected to the current transmitter, and then connected to the amplifying circuit. The output of the amplifying circuit is connected to the input module of the control host through the signal line, and the power cable provides power for the current transmitter and the amplifying circuit. The signal acquisition device, current transmitter and amplifier circuit of the tension sensing component are integrated into one body, and have a special shell, which is easy to install and has good anti-interference and corrosion resistance functions.

The tension signal acquisition device is a strain gauge sensitive to tension. The different tension of the steel cable under different loads makes the strain gauge obtain a corresponding voltage signal. The voltage signal is sent to the current transmitter to be converted into a current signal, and then amplified by the amplifier circuit. Then send it to the input module of the control host. The input module converts the analog signal into a digital quantity and sends it to the programmable controller; the analysis and comparison software in the programmable controller compares the tension signal of each lifting point with the stored cable tension allowable value and synchronization error allowable value. Value, alarm value, emergency stop value comparison, when the alarm value or emergency stop value is exceeded, the programmable controller sends an instruction through the output module to make the sound/light alarm device alarm and/or the strong current control relay action to stop.

The guide rail attached scaffolding monitoring system also includes a synchronous adjustment subsystem, which includes 1 to 40 sets of rotary encoders installed on the hoisting motor reducer at each lifting point and frequency conversion controllers for each motor to control the host. The program controller stores the motor speed analysis and comparison program. The rotary encoder has an amplifier, and is connected to the input module of the control host through a signal line, and the control signal line of the output module of the control host is connected to the variable frequency controller of the hoisting motor. According to the speed signal of each hoisting motor, the programmable controller compares the speed of each motor and sends a signal to the frequency conversion controller of each hoisting motor. The frequency conversion control adjusts the speed of each hoisting motor to ensure that the vertical displacement of the lifting objects at each lifting point is consistent.

The guide rail-attached scaffold monitoring system also includes an auxiliary monitoring subsystem. The auxiliary monitoring subsystem includes 2 to 6 sets of cameras installed on the frame structure. The video signal lines of each camera can be connected to the control host through a multi-channel video acquisition card. Programmable controller, the angle and position of the camera can be adjusted. Through the computer screen connected with the programmable controller, the lifting situation of each lifting point of the scaffold can be observed remotely in real time, and the images of key parts can be enlarged and observed, which is helpful for remote and early detection of abnormal conditions and artificial emergency parking to avoid the expansion of faults .

The auxiliary monitoring subsystem also has 4 to 8 sets of stroke protection devices, which are installed on the guide rail attached to the load-bearing structure of the lifting point. Protection switch, up and down stroke protection switches are connected to the main AC contactor of the system power supply, when the scaffolding rises or falls to the limit position, touches the up or down stroke protection switch, automatically sends a signal to the AC contactor, disconnects the system power supply, all The motor stops running at the same time, avoiding overload caused by structural self-interference, and realizing unmanned safety control.

The control host of the guide rail-attached scaffolding monitoring system also has an online interface, which can be connected with a common computer (PC), and the system data can be input, modified, stored, printed, etc. with the aid of computer input and output facilities.

The control host and/or on-site strong and weak current control facilities of this guide rail-attached scaffold monitoring system are equipped with an operation platform. There are manual buttons and main power switches for each lifting motor on the operation platform, and manual single-point and joint control can be performed as required. Or inching, continuous and other positive and negative control. There are also limit alarm indicators for each lifting point on the operating platform, which is convenient for timely control of the operating status of the lifting scaffold.

The advantages of the guide rail type attached lifting scaffold monitoring system of the present invention are:

1. It is suitable for various current motor-powered lifting scaffolds, including lifting tension monitoring subsystem, synchronous adjustment subsystem and auxiliary monitoring subsystem. It is managed by a computer monitoring platform, and the information collected by each subsystem is processed and analyzed in real time. , record, feedback, and control strong and weak current facilities to work in a timely, correct and stable manner according to instructions.

2. Real-time monitoring of the cable tension of dozens of lifting points can be carried out at the same time, and the extracted signals can be analyzed and processed with the support of application software to make safety judgments, with fast response speed and high calculation accuracy;

3. The integrated volume of the tension sensing component is small, the signal transmission distance exceeds 100 meters, the installation is simple, and the shell is anti-interference and anti-corrosion;

4. The synchronous adjustment subsystem automatically adjusts the speed of each hoisting motor through frequency conversion control to ensure that the vertical displacement of each lifting point is consistent;

5. The algorithm of the control host is standardized, the supporting software has excellent performance, the interface is friendly, intuitive, easy to operate, and can communicate with ordinary PCs;

6. The system hardware is integrated and highly standardized, suitable for various modern super high-rise building environments such as frame structure and steel structure, and easy to use and maintain.

(4) Description of drawings

Fig. 1 is a schematic diagram of the overall installation structure of the embodiment of the guide rail-attached scaffold monitoring system;

Fig. 2 is the overall circuit block diagram of the embodiment of the guide rail type attached scaffolding monitoring system;

Fig. 3 is the block diagram of the control circuit of the tension sensor component of the embodiment of the guide rail type attached scaffold monitoring system;

Fig. 4 is the control circuit block diagram of the synchronous regulation subsystem embodiment of this guide rail type attached scaffold monitoring system;

Fig. 5 is the schematic diagram of the control host operating platform panel of the embodiment of the guide rail type attached scaffold monitoring system;

Fig. 6 is a schematic diagram of the computer screen operation interface connected to the control host computer of the embodiment of the guide rail-attached scaffold monitoring system.

The labels in the figure are:

1. Frame structure, 2. Camera, 3. Bearing beam, 4. Travel protection switch, 5. Jack, 6. Steel cable, 7. Guide device, 8. Tension sensor component.

(5) Specific implementation methods

The overall structure of the embodiment of the rail-type attached lifting scaffold monitoring system is shown in Figure 1, which shows that the working part of the lifting scaffold from the nth floor nF to the n+3th floor (n+3)F includes the frame structure 1 and the attachment load-bearing structure. Among them, the frame structure is composed of vertical main frame, horizontal beam frame and connectors, with light weight and high rigidity; the attached load-bearing structure includes power system, load-bearing beam 3, anti-falling device, and guiding device 7 . The monitoring system in this example includes the control host and the strong current control cabinet connected to it.

The control host is 100 meters away from the construction site, and the power line and signal line are connected to the on-site strong current control cabinet and the lifting tension monitoring subsystem, the signal acquisition device of the synchronous adjustment subsystem and the auxiliary monitoring subsystem. The control host is placed in a room away from the construction site to avoid being affected by site dust, humidity, vibration, etc.

The circuit block diagram of the embodiment of the monitoring system is shown in Figure 2. The control host includes a programmable controller and a memory connected thereto, an input module, an output module, and a sound/light alarm device. The output module is connected to strong and weak current control elements and sound/light Light alarm device. Programmable controller and memory can be integrated into one. 20 sets of tension sensing components 8 of the lifting tension monitoring subsystem, 20 sets of rotary encoders of the synchronous adjustment subsystem, 4 sets of cameras 2 and 5 sets of stroke protection switches 4 of the auxiliary monitoring subsystem are all connected to the control host. The control host performs real-time processing, analysis, recording and feedback on the information collected by each subsystem, and controls the strong and weak current facilities to work in a timely, correct and stable manner according to the instructions.

The control circuit of one tension sensing component of the lifting tension monitoring subsystem in this example is shown in Figure 3. The tension sensing component includes a tension signal acquisition device, a current transmitter, and an amplifier circuit. The tension signal acquisition device is a strain gauge, the output of which is connected to the current transmitter, and then connected to the amplifying circuit. The output of the amplifying circuit is connected to the input module of the control host through the signal power cable. The amplifying circuit of the transmitter provides power and performs signal transmission. The relevant analysis and comparison software stored in the programmable controller of the control host, the allowable value of cable tension, the allowable value of synchronization error, the alarm value, the emergency stop value, etc. stored in the memory. The output module of the control host is connected to the sound/light alarm device, and is also connected to the strong current control cabinet on site through the signal line. When the alarm value is exceeded, the programmable controller sends an instruction to make the sound/light alarm device alarm through the output module, and when the emergency stop value is reached, it sends an instruction to the strong current control cabinet to stop the relay that controls the lifting motor. The tension signal acquisition device, current transmitter and amplifying circuit of the tension sensing component are integrated, and have a special stainless steel shell, which is anti-interference and corrosion-resistant. As shown in FIG. 1 , each tension sensing assembly 8 is installed on the wire rope 6 of each lifting point jack 5 . Multiple sets of tension sensing components 8 can be connected to the control host in groups. In this example, 20 sets of tension sensing components 8 are divided into 4 groups and connected to the control host.

The control circuit structure of one of the hoisting motors in the synchronous adjustment subsystem of this example is shown in Figure 4, including the rotary encoder installed on the hoisting motor reducer at the hoisting point and the frequency conversion controller of the motor in the control cabinet. The rotary encoder is equipped with an amplifier. The rotational speed signal is collected through the rotary encoder installed on the hoisting motor. After the amplifier is amplified, it is connected to the input module of the control host through the signal power cable; the output module of the control host then transmits the feedback control signal to the variable frequency controller that controls the hoisting motor. According to the speed signal of each hoisting motor, the programmable controller controls the frequency conversion controller to automatically adjust the speed of each hoisting motor through its stored motor speed analysis and comparison program to achieve synchronous rise or fall of multiple lifting points.

The auxiliary monitoring subsystem of the guide rail-attached lifting scaffold monitoring system in this example is equipped with 4 sets of cameras 2 on the frame structure 1, as shown in FIG. 1 . The video signal line of the camera 2 is connected to the programmable controller of the control host through a multi-channel video acquisition card, and the installation position and angle of the camera 2 are adjustable. The support frame and the cable interface of the camera 2 are all plug-in connections, so as to facilitate quick installation.

The auxiliary monitoring subsystem of the guide rail-attached lifting scaffold monitoring system in this example is equipped with 5 sets of stroke protection devices, which are installed on the guide rail attached to the load-bearing structure as required, as shown in Figure 1. The upper and lower travel protection switches 4 are respectively installed on the upper and lower limit positions of the guide rail. The travel protection switch 4 is connected to the AC contactor of the main power supply. When the scaffold rises or falls to the limit position, the stroke protection switch 4 is touched to automatically control the The AC contactor cuts off the power.

Once the lifting scaffold operation starts, the programmable controller of the control host will analyze and compare the difference between the current status of the equipment and the allowable value in real time through the set program calculation method, and timely judge and record the three states of normal, abnormal and dangerous. When an abnormality occurs, the control panel and the control display will have warning lights, text and other information prompts; when it develops into a dangerous state, in addition to warning lights, text and other information to indicate the fault location, the system will automatically cut off the power immediately and the buzzer will alarm , emergency stop all the motor work of the lifting scaffold.

The programmable controller of the control host in this example has an online interface, which can be connected with a common computer (PC). The connected computer input facility can input or modify the stored data of the programmable controller, and the computer screen or all Connected with peripherals, it can display or output the results of programmable controller detection and analysis.

As shown in Figure 1, the control host and the on-site strong and weak current control cabinets are connected with an operating platform. The panel of the operating platform is shown in Figure 5. There is a main power switch on it, which controls the integral rise and integral decline buttons of all motors, and the emergency stop button. There are also fault indicator lights of each lifting point, limit alarm indicators of each lifting point and the corresponding stand-alone ascending and descending manual keys of the lifting motors of each lifting point. Through the manual buttons of each lifting motor, a certain lifting motor can be manually controlled to jog, and the height of the hook can be fine-tuned. Figure 6 is the computer screen operation interface connected to the control host, which has real-time images and data display of the working status of the motors of each lifting point, and has the same operation functions as the operation platform. The corresponding operation can be performed in time by using the control host, the on-site operation platform and the external computer.

Through the computer screen connected with the programmable controller, the lifting situation of each lifting point of the lifting scaffold can be observed in real time, and the images of key parts can be enlarged and observed, and the emergency stop button on the platform can be found to find abnormal conditions to avoid accidents.

The system automatically records the occurrence time and occurrence time of each fault, and can automatically generate a table according to the instruction within a certain period of time (such as within 1 week) including normal operation time period, failure time period, failure times and occurrence time, tension over-undervalue and other information tables .

The above-mentioned embodiments are only specific examples for further specifying the purpose, technical solutions and beneficial effects of the present invention, and the present invention is not limited thereto. Any modifications, equivalent replacements, improvements, etc. made within the disclosed scope of the present invention are included in the protection scope of the present invention.

Claims (9)

1. monitoring system of guide-rail attached lifting scaffold, be installed on the guide tracked scaffold that adheres to that comprises frame structure (1) and adhere to load-carrying members, the strong, weak electricity control device that comprises main control system and be attached thereto, main control system comprises programmable controller and the memory that is attached thereto, input module, output module harmony/light warning device, and output module connects strong, weak electricity control element and sound/light warning device; It is characterized in that:

Contain lifting tension force Monitor And Control Subsystem, lifting tension force Monitor And Control Subsystem comprises the correlation analysis comparison software of storing in the programmable controller of main control system, cable tension allowable value, synchronous error permissible value, alarming value, the emergency shutdown value of store memory storage, be installed on 1～40 cover tension force sensory package (8) on the cable wire (6) of each suspension centre jack (5) in addition, the output of each tension force sensory package is connected with the input module of main control system through holding wire;

Each tension force sensory package (8) comprises tension signal harvester, current transducer, amplifying circuit; The output of tension signal harvester inserts current transducer, connects amplifying circuit again, and the output of amplifying circuit is through the input module of holding wire Access Control main frame, and power supply cable provides power supply for current transducer and amplifying circuit.

2. the guide tracked scaffold monitoring system of adhering to according to claim 1 is characterized in that:

Signal pickup assembly, current transducer and the amplifying circuit of described tension force sensory package (8) are integrated, and shell is arranged.

3. the guide tracked scaffold monitoring system of adhering to according to claim 1 and 2 is characterized in that:

Also contain the adjusted in concert subsystem, the adjusted in concert subsystem comprises that 1～40 cover is installed on the frequency-variable controller of rotary encoder on each suspension centre bridge motor reducer and each motor, stores motor speed and analyzes comparison program in the programmable controller of main control system; Rotary encoder has amplifier, is connected with the input module of main control system by holding wire, and the control signal wire of the output module of main control system connects the frequency-variable controller of bridge motor.

4. the guide tracked scaffold monitoring system of adhering to according to claim 1 and 2 is characterized in that:

Also contain auxiliary Monitor And Control Subsystem, this auxiliary Monitor And Control Subsystem comprises 2～4 cover cameras (2) that are installed on frame structure, and the video signal cable of each camera (2) is through the programmable controller of multi-channel video capture card Access Control main frame.

5. the guide tracked scaffold monitoring system of adhering to according to claim 4 is characterized in that:

Described camera (2) is the adjustable camera of angle and position, and the support of camera (2), cable interface are plug-in and connect.

6. the guide tracked scaffold monitoring system of adhering to according to claim 1 and 2 is characterized in that:

Also contain auxiliary Monitor And Control Subsystem; should 4～8 cover stroke protective devices be arranged auxiliary Monitor And Control Subsystem; be installed on the guide rail of suspension centre; every cover stroke protective device comprises the limes superiors position that is installed on guide rail respectively and the upper and lower stroke protection switch (4) of limit inferior position, total A.C. contactor of upper and lower stroke protection switch (4) connected system power supply.

7. the guide tracked scaffold monitoring system of adhering to according to claim 1 and 2 is characterized in that:

The programmable controller of described main control system also is provided with on-line interface.

8. monitoring system of guide-rail attached lifting scaffold according to claim 1 and 2 is characterized in that:

Described main control system and/or on-the-spot strong, weak electricity control device are connected to operating platform, and total power switch is arranged on it, and that controls all motors rises overally and whole decline button emergency stop push button; Also have with the corresponding unit of each suspension centre bridge motor and rise and the manual button that descends.

9. monitoring system of guide-rail attached lifting scaffold according to claim 8 is characterized in that:

The malfunction indicator lamp and the spacing alarm indicator lamp that also have each suspension centre on the operating platform of described main control system and/or on-the-spot strong, weak electricity control device.

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