CN203149386U - Intelligent control system for attached-type lifting scaffold - Google Patents

Abstract

The utility model relates to an intelligent control system for an attached lifting scaffold, which comprises at least two sub-control boxes installed on each machine position point of the scaffold body, and the input ends of the sub-control boxes are respectively connected with a gravity sensor and a displacement sensor. The output end of the sub-control box is connected with the contactor of the low-speed electric chain hoist through the control circuit, and the input and output ends of the sub-control box communicate with the upper computer through the communication circuit. The utility model is simple in structure and easy to install. Since the upper computer uses a portable PC, RS485 communication circuit and STC-28 single-chip microcomputer, the communication distance between the upper computer and the sub-control box can be relatively far, and the communication is stable and reliable. When the machine position is overloaded, even if the operator issues a lifting or lowering command, the system will not run, but will give a prompt, and the lifting or lowering operation cannot be performed until all the machine position loads are within the normal range, avoiding the operator Potential safety hazards caused by misuse.

Description

Intelligent Control System of Attached Elevating Scaffold

technical field

The utility model relates to the field of attached lifting scaffolds, in particular to an intelligent control system for attached lifting scaffolds.

Background technique

At present, the existing control systems for attached lifting scaffolds in China basically only install some simple instruments on the scaffold body, or adopt the form of PLC control cabinet plus simple instruments, and each building must install a large control system. cabinet. Although the existing control system also has simple over-limit alarm and frame lifting functions, in the actual use process, there are disadvantages such as bulky console, high construction cost, and poor communication reliability. After the body is installed, there are often phenomena such as difficulty in lifting, poor connection between machine positions, and slow response of the touch screen when the temperature is low, which may even lead to safety accidents such as local bending and collapse of the body.

Utility model content

The purpose of this utility model is to provide a safe, high reliability, installed on the scaffold body, capable of displaying the load weight of each machine position on the scaffold, and capable of automatically controlling the overall lifting and lowering of the scaffold and automatic shutdown when overloaded. Intelligent control system of attached lifting scaffold.

In order to achieve the above purpose, the utility model adopts the following technical solutions: an intelligent control system for an attached lifting scaffold, including at least two sub-control boxes installed on each machine position point of the scaffold body, and the input of the sub-control boxes The terminals are respectively connected with the gravity sensor and the displacement sensor, the output terminal of the sub-control box is connected with the contactor of the low-speed electric chain hoist through the control circuit, and the input and output terminals of the sub-control box communicate with the host computer through the communication circuit.

The input terminal of the sub-control box is connected with the setting button, and the output terminal of the sub-control box is connected with the display circuit; the communication circuit is an RS485 communication circuit; the sub-control box adopts STC-28 single-chip microcomputer, and the upper computer is PC.

The setting buttons are composed of buttons S1, S2, S3, and S4, and the buttons S1, S2, S3, and S4 are respectively connected to the 17th, 18th, 19th, and 20th pins of the STC-28 single-chip microcomputer.

Described RS485 communication circuit adopts RS485 driver chip U1, and its 2nd, 3 pins are connected and then connected with the 1st pin of STC-28 single-chip microcomputer, and its 1st, 4 pins are connected with the 4th, 5th lead of STC-28 single-chip microcomputer respectively. The pins are connected, the 5th pin is grounded, the 6th pin is connected to the RS485 bus through the resistor R7, and the 7th pin is connected to the RS485 bus through the resistor R12.

The display circuit adopts a liquid crystal driver chip U2, and its 18th, 19th, and 20th pins are respectively connected with the 21st, 22nd, and 23rd pins of the STC-28 single-chip microcomputer, and its 17th, 16th, 14th, and 13th pins are respectively connected with the digital The 6th, 8th, 9th, and 12th pins of the tube chip U3 are connected, the 2nd pin is connected to the 11th pin of the digital tube chip U3 through the resistor R5, and the 3rd pin is connected to the 1st pin of the digital tube chip U3 through the resistor R6 7 pins, the 4th pin is connected to the 4th pin of the digital tube chip U3 through the resistor R8, the 5th pin is connected to the 2nd pin of the digital tube chip U3 through the resistor R9, and the 6th pin is connected to the 6th pin through the resistor R10 Connect to the 1st pin of the digital tube chip U3, its 7th pin is connected to the 10th pin of the digital tube chip U3 through the resistor R11, its 8th pin is connected to the 5th pin of the digital tube chip U3 through the resistor R13, and its The ninth pin is connected to the third pin of the nixie tube chip U3 through the resistor R15.

Described control circuit comprises optocoupler VT1, VT2, the input end of optocoupler VT1 is connected with the 12th pin of STC-28 single-chip microcomputer, the input end of optocoupler VT2 is connected with the 13th pin of STC-28 single-chip microcomputer, and optocoupler VT1 The output end of the resistor R19 is connected to one end of the resistor R19, the other end of the resistor R19 is connected to the base of the transistor Q2, the collector of the transistor Q2 is connected to the coil of the relay K2, the output end of the optocoupler VT2 is connected to one end of the resistor R18, and the resistor R18 The other end of the transistor is connected to the base of the transistor Q1, the collector of the transistor Q1 is connected to the coil of the relay K1, the static contact of the relay K1 and the static contact of the relay K2 are connected to the contactor of the low-speed electric chain hoist.

It can be seen from the above-mentioned technical scheme that the utility model has simple structure and is easy to install. Since the upper computer adopts a portable PC, RS485 communication circuit and STC-28 single-chip microcomputer, the communication distance between the upper computer and the sub-control box can be relatively far, and ensure Communication is stable and reliable. As long as the pre-alarm and alarm values are set, the system will shut down immediately when overload occurs, regardless of whether the operator observes the overload on the frame. In addition, when the aircraft position is overloaded, even if the operator issues a lifting or lowering command, the system will not operate, but will give a prompt, and the lifting or lowering operation cannot be performed until the loads of all aircraft positions are within the normal range, avoiding Potential safety hazards caused by operator misuse.

Description of drawings

Fig. 1 is a circuit block diagram of the utility model.

Fig. 2, 3, 4, 5 are the circuit principle diagrams of sub-control box, RS485 communication circuit, display circuit and control circuit in the utility model respectively.

Detailed ways

An intelligent control system for an attached lifting scaffold, comprising at least two sub-control boxes 3 installed on each machine position point of the scaffold body, the input ends of the sub-control boxes 3 are respectively connected with a gravity sensor and a displacement sensor, and the sub-control The output end of the box 3 is connected with the contactor of the low-speed electric chain hoist through the control circuit 5, and the input and output ends of the sub-control box 3 communicate with the upper computer 1 through the communication circuit. The input terminal of the sub-control box 3 is connected with the setting button, and the output terminal of the sub-control box 3 is connected with the display circuit 4; the communication circuit is an RS485 communication circuit 2; the sub-control box 3 adopts a STC-28 single-chip microcomputer; The upper computer 1 is a PC. As shown in Figure 1.

As shown in Figure 2, the setting buttons are composed of buttons S1, S2, S3, and S4, and the buttons S1, S2, S3, and S4 are respectively connected to the 17th, 18, 19, and 20 pins of the STC-28 single-chip microcomputer.

As shown in Figure 3, described RS485 communication circuit 2 adopts RS485 drive chip U1, and its 2nd, 3 pins are connected and then connected with the 1st pin of STC-28 single-chip microcomputer, and its 1st, 4 pins are respectively connected with STC-28 The 4th and 5th pins of the microcontroller are connected, the 5th pin is grounded, the 6th pin is connected to the RS485 bus through the resistor R7, and the 7th pin is connected to the RS485 bus through the resistor R12.

As shown in Fig. 4, described display circuit 4 adopts liquid crystal driver chip U2, and its 18th, 19th, 20th pins are connected with the 21st, 22nd, 23rd pins of STC-28 single-chip microcomputer respectively, and its 17th, 16th, 14th pins are connected to each other respectively. , 13 pins are respectively connected to the 6th, 8th, 9th, 12th pins of the digital tube chip U3, the 2nd pin is connected to the 11th pin of the digital tube chip U3 through the resistor R5, and the 3rd pin is connected to the 11th pin of the digital tube chip U3 through the resistor R6 Connect to the 7th pin of the digital tube chip U3, its 4th pin is connected to the 4th pin of the digital tube chip U3 through the resistor R8, its 5th pin is connected to the 2nd pin of the digital tube chip U3 through the resistor R9, and its The 6th pin is connected to the 1st pin of the digital tube chip U3 through the resistor R10, the 7th pin is connected to the 10th pin of the digital tube chip U3 through the resistor R11, and the 8th pin is connected to the digital tube chip U3 through the resistor R13 The 5th pin, its 9th pin is connected to the 3rd pin of the nixie tube chip U3 through the resistor R15.

As shown in Figure 5, described control circuit 5 comprises optocoupler VT1, VT2, and the input end of optocoupler VT1 is connected with the 12th pin of STC-28 single-chip microcomputer, and the input end of optocoupler VT2 is connected with the 13th pin of STC-28 single-chip microcomputer The pins are connected, the output end of the optocoupler VT1 is connected to one end of the resistor R19, the other end of the resistor R19 is connected to the base of the transistor Q2, the collector of the transistor Q2 is connected to the coil of the relay K2, and the output end of the optocoupler VT2 is connected to the resistor One end of R18 is connected, the other end of resistor R18 is connected to the base of transistor Q1, the collector of transistor Q1 is connected to the coil of relay K1, the static contact of relay K1 and the static contact of relay K2 are connected with the low-speed electric chain hoist connected to the contactor of the machine. That is to say, the moving contact CW_COM and static contact CW_CL of the relay K1 are connected to the control coil of the contactor of the low-speed electric chain hoist. The electric chain hoist just rotates forward; the moving contact CCW_COM and static contact CCW_CL of the relay K2 are connected to the control coil of the contactor of the low-speed electric chain hoist, when it is closed, the control coil of the contactor is energized, and the main When the contacts are closed, the low-speed electric chain hoist reverses. the

Below in conjunction with Fig. 1,2,3,4,5 the utility model is described further.

The upper computer 1 is equipped with a program to control the forward and reverse operation or stop of the low-speed electric chain hoist. On the one hand, the displacement sensor is used to control the synchronous operation of the low-speed electric chain hoist. In addition, the gravity sensor is used to limit the load to prevent overload. , underload, to achieve a dual control. This system is applied to the attached lifting scaffolding, and is connected with the upper computer 1 through the RS485 communication bus, and is uniformly controlled by the upper computer 1. The device for controlling overload and underload when multiple machines are raised and lowered at the same time can realize automatic alarm when the load value of adjacent machines exceeds 15%, and automatic shutdown and alarm when the load value exceeds 30%.

Install the sub-control box 3 on each machine position of the scaffold, and connect the power cable and communication cable, then turn on the power, the sub-control box 3 and the host computer 1 communicate through the RS485 bus, and the sub-control box 3 uploads the corresponding data to the upper computer 1. The load value and displacement value at the machine position, the upper computer 1 sends operation commands such as lifting, lowering and stopping to the sub-control box 3. The status information of each machine position can be monitored through the host computer 1: load value, displacement value, communication status, running status and alarm status. When the communication of all machine positions is normal and the load value is within the normal range, the upper computer 1 can perform overall lifting or lowering operations on the frame body.

The upper limit warning value, upper limit warning value, lower limit warning value and lower limit warning value of each machine position can be set through the host computer 1. Value comparison, if the load of a certain machine position exceeds the set alarm value, the upper computer 1 will immediately send a shutdown command to all sub-control boxes 3 to control all machine positions to stop, and the over-limit machine position number will be displayed on the monitoring interface, and Sound and light alarm, at the same time, the lower computer installed at the overrun machine position will also send out sound and light alarm signals, which is convenient for maintenance personnel to quickly locate. When the position of the frame body or the hinge needs to be adjusted, the upper computer 1 can also send a lifting or lowering command to a certain machine position separately to control the lifting or lowering of a single machine position.

Press the keys S1, S2, S3, and S4 to set upper limit alarm, upper limit alarm, lower limit alarm and lower limit alarm parameters, and set the communication address and communication baud rate of the sub-control box 3. The set alarm parameters, communication address and communication baud rate can all be displayed on the digital tube chip U3 in turn. The STC-28 single-chip microcomputer uploads the collected load information and displacement information to the host computer 1 through the RS485 driver chip U1, and at the same time receives and executes the commands sent by the host computer 1. The upper computer 1 sends a data request command to the RS485 bus every 10ms, and the communication address is from 1 to 60 in turn;

After the STC-28 single-chip microcomputer receives the data packets on the RS485 bus, it analyzes them respectively. If the communication address is correct and the verification is correct, it returns the load value and displacement value according to the data request command sent by the host computer 1. If the load value exceeds the set alarm value, the upper computer 1 will send a stop command, and P2.0 and P2.1 of the STC-28 single-chip microcomputer output high level, reset the contacts of the lifting and lowering output relays K1 and K2, and cut off the low-speed The power supply of the electric chain hoist achieves the purpose of stopping.

In summary, the utility model has a simple structure and is easy to install. Since the upper computer 1 adopts a portable PC, RS485 communication circuit 2 and STC-28 single-chip microcomputer, the communication distance between the upper computer 1 and the sub-control box 3 can be relatively far , and ensure stable and reliable communication. As long as the pre-warning and alarm values are set, the system will shut down immediately when overload occurs, regardless of whether the operator observes the overload on the frame. In addition, when the aircraft position is overloaded, even if the operator issues a lifting or lowering command, the system will not operate, but will give a prompt, and the lifting or lowering operation cannot be performed until the loads of all aircraft positions are within the normal range, avoiding Potential safety hazards caused by operator misuse.

Claims (6)

1. the intelligence control system of an attachment type raise scaffold, it is characterized in that: comprise at least two sub-control box (3) on each seat in the plane point that is installed in the framing scaffold support body, the input end of sub-control box (3) links to each other with gravity sensor, displacement transducer respectively, the output terminal of sub-control box (3) links to each other with the contactor of the electronic loop chain hoister of low speed by control circuit (5), and the input/output terminal of sub-control box (3) is by telecommunication circuit and host computer (1) communication.

2. the intelligence control system of attachment type raise scaffold according to claim 1 is characterized in that: the input end of described sub-control box (3) with set button and link to each other, the output terminal of sub-control box (3) links to each other with display circuit (4); Described telecommunication circuit is RS485 telecommunication circuit (2); Described sub-control box (3) adopts the STC-28 single-chip microcomputer; Described host computer (1) is PC.

3. the intelligence control system of attachment type raise scaffold according to claim 2, it is characterized in that: described setting button is made up of button S1, S2, S3, S4, and button S1, S2, S3, S4 link to each other with the 17th, 18,19,20 pins of STC-28 single-chip microcomputer respectively.

4. the intelligence control system of attachment type raise scaffold according to claim 2, it is characterized in that: described RS485 telecommunication circuit (2) adopts RS485 to drive chip U1, after linking to each other, its 2nd, 3 pin connects the 1st pin of STC-28 single-chip microcomputer, its the 1st, 4 pin links to each other with the 4th, 5 pins of STC-28 single-chip microcomputer respectively, its the 5th pin ground connection, its the 6th pin connects the RS485 bus by resistance R 7, and its 7th pin connects the RS485 bus by resistance R 12.

5. the intelligence control system of attachment type raise scaffold according to claim 2, it is characterized in that: described display circuit (4) adopts lcd drive chip U2, it is the 18th years old, 19,20 pins respectively with the 21st of STC-28 single-chip microcomputer, 22,23 pins link to each other, it is the 17th years old, 16,14,13 pins respectively with the 6th of charactron chip U3,8,9,12 pins link to each other, its the 2nd pin connects the 11st pin of charactron chip U3 by resistance R 5, its the 3rd pin connects the 7th pin of charactron chip U3 by resistance R 6, its the 4th pin connects the 4th pin of charactron chip U3 by resistance R 8, its the 5th pin connects the 2nd pin of charactron chip U3 by resistance R 9, its the 6th pin connects the 1st pin of charactron chip U3 by resistance R 10, its the 7th pin connects the 10th pin of charactron chip U3 by resistance R 11, its the 8th pin connects the 5th pin of charactron chip U3 by resistance R 13, and its 9th pin connects the 3rd pin of charactron chip U3 by resistance R 15.

6. the intelligence control system of attachment type raise scaffold according to claim 2, it is characterized in that: described control circuit (5) comprises optocoupler VT1, VT2, the input end of optocoupler VT1 links to each other with the 12nd pin of STC-28 single-chip microcomputer, the input end of optocoupler VT2 links to each other with the 13rd pin of STC-28 single-chip microcomputer, the output terminal of optocoupler VT1 links to each other with an end of resistance R 19, the other end of resistance R 19 links to each other with the base stage of triode Q2, the collector of triode Q2 links to each other with the coil of relay K 2, the output terminal of optocoupler VT2 links to each other with an end of resistance R 18, the other end of resistance R 18 links to each other with the base stage of triode Q1, the collector of triode Q1 links to each other with the coil of relay K 1, the stationary contact of relay K 1, the stationary contact of relay K 2 all links to each other with the contactor of the electronic loop chain hoister of low speed.

Images