CN220962220U - Intelligent recognition system for position state of pull switch of belt conveyor - Google Patents
Intelligent recognition system for position state of pull switch of belt conveyor Download PDFInfo
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- CN220962220U CN220962220U CN202323204131.5U CN202323204131U CN220962220U CN 220962220 U CN220962220 U CN 220962220U CN 202323204131 U CN202323204131 U CN 202323204131U CN 220962220 U CN220962220 U CN 220962220U
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Abstract
The utility model relates to the technical field of pull switches, in particular to an intelligent recognition system for the position state of a pull switch of a belt conveyor. The system consists of a position state identifier, a plurality of position signal generators, a loop state monitoring resistor and a power supply module. The position signal generator comprises a pull-cord switch and a resistor, and the position state identifier comprises a PLC, an A/D converter and a touch screen, and the components are electrically connected. The A/D converter, the resistor of the position signal generator and the loop state monitoring resistor form a closed loop together, and the signal generators are connected in cascade in turn. In this system, the fault location can be displayed on the touch screen upon actuation of the pull-cord switch. The system of the utility model provides an efficient and accurate method for identifying and controlling the running state of the belt conveyor, thereby improving the safety and the efficiency.
Description
Technical Field
The utility model relates to the technical field of pull switches, in particular to an intelligent recognition system for the position state of a pull switch of a belt conveyor.
Background
The pull rope switch is an important component of a safety system of the coal conveying belt conveyor, is arranged on the racks at two sides of the conveyor and is connected with each other through steel wire ropes along two sides of the racks. In emergency situations, such as accidents or personal safety threats, the switches can pull the steel wire rope at any position to stop the operation of the conveyor, so that the accidents are prevented from being further expanded.
While pull switches play a key role in safety, existing systems have the following problems:
1. Trouble shooting difficulty: the number of pull switches along the belt conveyor is numerous, as many as 300. Only the pull rope signal is displayed on the upper computer after the pull rope switch acts, and no specific pull rope switch position is displayed. By observing the appearance indication method, the actual action position is determined, the fault position can be inspected in two sections only after the pull switch in the middle of the belt conveyor is disconnected, and the circuit inspection workload is high. More serious, because most of conveying sections of the belt conveyor are arranged in the open air, misoperation is caused by short circuit of contacts of the pull switch in rainy and snowy days due to improper protection, the operation cannot be confirmed through appearance display, the equipment end covers and the junction boxes can only be opened one by one for inspection, the workload is multiplied, and the inspection and fault processing time of the pull switch is greatly prolonged. The belt conveyor of the coal conveying system is relatively long, and the starting operation of the conveyor is often influenced due to overlong time of a pull switch or a fault point of the checking action, and meanwhile, the coal unloading efficiency is limited.
2. Problems with a pull-cord switch with bus address coding: although this type of switch may provide more accurate location information, it is costly, requires separate address settings for each switch, is complex in equipment, and has a high failure rate. In addition, the operation is complicated when installing and setting the position.
3. The fault detection of the signal loop is insufficient: whether of the normal type or the address coding type, the pull-cord switch lacks effective signal loop fault detection and alarm functions, and limits the capability of preventing and rapidly responding to faults.
Disclosure of utility model
The utility model aims to provide an intelligent recognition system for the position state of a pull switch of a belt conveyor, which can realize automatic recognition and display of the exact position of the operated pull switch.
The basic scheme provided by the utility model is as follows: an intelligent recognition system for the position state of a pull switch of a belt conveyor, comprising: a position state identifier, a plurality of position signal generators, a loop state monitoring resistor and a power module; the position signal generator comprises a pull-cord switch and a resistor; the position state identifier comprises a PLC, an A/D converter and a touch screen, wherein the PLC, the A/D converter and the touch screen are electrically connected; the A/D converter, the resistors of the plurality of position signal generators and the loop state monitoring resistor form a closed loop together, and the plurality of position signal generators are sequentially cascaded; the touch screen displays the fault position when the pull-cord switch acts.
Further, a resistor of each of the plurality of position signal generators is connected in sequence between one input terminal of the a/D converter and one end of the loop state monitoring resistor, and the other input terminal of the a/D converter is connected with the other end of the loop state monitoring resistor.
Further, one end of a pull switch in each position signal generator is connected with a connection point of the A/D converter and the loop state monitoring resistor; the other end of the pull switch is connected to the connection point of the resistor of the current position signal generator and the resistor of the later stage position signal generator.
Further, the position state identifier determines the operation state of the pull-cord switch by calculating the change in the resistance value based on the signal received from the position signal generator.
Furthermore, a four-wire system wiring mode is adopted among the position signal generator, the position state identifier, the loop state monitoring resistor and the power supply module.
Further, the position state identifier further comprises a DCS alarm, the DCS alarm is communicated with the PLC through an RS485 interface, and data exchange is carried out by adopting a Modbus protocol.
The implementation principle of the utility model is as follows: the position signal generator comprises a pull switch and a resistor, and generates different signals according to the state of the pull switch. When the state of the pull-cord switch changes, the value of the resistor also changes, which affects the output signal of the position signal generator. The output signal of the position signal generator is output to a position state identifier, and the position state identifier comprises a PLC, an analog-to-digital conversion clamping piece, a touch screen and a DCS alarm. The position state identifier calculates the change of the resistance value of the resistor to judge the action state of the pull-cord switch.
The utility model has the beneficial effects that: according to the utility model, the position state of the pull switch is monitored and identified in real time, and when the pull switch acts, the touch screen can display the fault position, so that the fault detection and maintenance are faster and more accurate. Meanwhile, the working state of the signal loop can be automatically judged, and faults such as open circuit and poor contact of the signal loop can be timely alarmed, so that timely treatment is carried out.
Drawings
Fig. 1 is a flowchart of an intelligent recognition system for the position state of a pull switch of a belt conveyor.
Detailed Description
The following is a further detailed description of the embodiments:
The intelligent recognition system for the position state of the pull switch of the belt conveyor is shown in fig. 1, and the working principle of the system is to distinguish the position state of the pull switch based on the change of the resistance value of the series resistor. When a certain pull-switch acts, the normally open contact is closed, so that the corresponding position signal generator works, and the PLC can identify which pull-switch acts by calculating the total resistance change of the series resistor. Meanwhile, when no pull-cord switch acts, the whole signal input is the resistance value of the loop state monitoring resistor, and the resistance value is used as a basis for judging whether the signal loop works normally. In addition, when the pull-cord switch acts or the loop is abnormal, the touch screen interface can display corresponding alarm information and fault positions so that an operator can respond quickly.
The intelligent recognition system for the position state of the pull switch of the belt conveyor mainly comprises a position state recognizer, a plurality of position signal generators, a loop state monitoring resistor and a power module. The position signal generator comprises a pull-cord switch and a resistor; the position state identifier comprises a PLC, an A/D converter and a touch screen, wherein the PLC, the A/D converter and the touch screen are electrically connected; the touch screen displays the fault position when the pull-cord switch acts.
In the circuit connection shown in fig. 1, an a/D converter, a plurality of position signal generators and a loop state monitoring resistor form a loop, and the position signal generators are sequentially cascaded; the resistors of all the position signal generators are sequentially connected between one input end of the A/D converter and one end of the loop state monitoring resistor, the other input end of the A/D converter is connected with the other end of the loop state monitoring resistor, and the A/D converter, the resistors of all the position signal generators and the loop state monitoring resistor form a closed loop. One end of a pull rope switch of each position signal generator is connected with a connection point of the A/D converter and the loop state monitoring resistor; the other end is connected to the connection point of the resistor of the current position signal generator and the resistor of the next stage position signal generator.
In order to improve the stability and accuracy of signals, in this embodiment, a precision resistor is used, and four-wire wiring mode is adopted among the position signal generator, the position state identifier, the loop state monitoring resistor and the power module to avoid the influence of loop resistance and environmental change. The positive end A, B line of the signal loop is connected to the corresponding terminal of the PLC, and the negative end C, D line is also connected to the PLC, so that stable transmission of signals is ensured.
The PLC also communicates with an alarm of the DCS equipment through an RS485 interface, and data exchange is carried out by using a Modbus protocol so as to realize efficient operation of the system. In the embodiment, a DCS photon plate is used for alarming, and when the pull switch acts, the touch screen displays the corresponding pull switch for alarming, and the corresponding DCS photon plate for alarming; when the loop is abnormal, the touch screen display system faults turn red, and the corresponding DCS photon cards give an alarm; when the loop is normal, the touch screen display system is normally green, and the corresponding DCS photon card alarm disappears after confirmation.
In general, the system in this embodiment fully utilizes the spare contacts and leads of the existing pull-cord switch, achieves effective utilization of resources, reduces additional hardware requirements and installation complexity, and can automatically judge the working state of the signal loop, when faults such as open circuit or poor contact occur in the signal loop, the system can give an alarm in time and process the faults, and effectively prevents protection from being refused, so that the operation safety of the conveyer belt is ensured. In addition, the system can automatically recognize and record the exact position and time of the actuated pull switch and display the information. Therefore, the system not only can help operators to quickly locate and process problems and strengthen the capability of accident tracking and fault diagnosis, but also improves the response speed to emergency, is favorable for carrying out detailed recording on the events and provides convenience for subsequent analysis and processing.
The foregoing is merely exemplary of the present utility model, and specific structures and features well known in the art will not be described in detail herein, so that those skilled in the art will be aware of all the prior art to which the present utility model pertains, and will be able to ascertain the general knowledge of the technical field in the application or prior art, and will not be able to ascertain the general knowledge of the technical field in the prior art, without using the prior art, to practice the present utility model, with the aid of the present utility model, to ascertain the general knowledge of the same general knowledge of the technical field in general purpose. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these should also be considered as the scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the utility of the patent. The protection scope of the present utility model is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (6)
1. The utility model provides a belt conveyor stay cord switch position state intelligent identification system which characterized in that includes: a position state identifier, a plurality of position signal generators, a loop state monitoring resistor and a power module; each position signal generator comprises a pull switch and a resistor; the position state identifier comprises a PLC, an A/D converter and a touch screen, wherein the PLC, the A/D converter and the touch screen are electrically connected; the A/D converter, the resistors of the plurality of position signal generators and the loop state monitoring resistor form a closed loop together, and the plurality of position signal generators are sequentially cascaded; and the touch screen displays the fault position when the pull-cord switch acts.
2. The intelligent recognition system for the position state of a pull switch of a belt conveyor according to claim 1, wherein: the resistor of each position signal generator is sequentially connected between one input end of the A/D converter and one end of the loop state monitoring resistor, and the other input end of the A/D converter is connected with the other end of the loop state monitoring resistor.
3. The intelligent recognition system for the position state of a pull switch of a belt conveyor according to claim 2, wherein: one end of a pull switch in each position signal generator is connected with a connection point of the A/D converter and the loop state monitoring resistor; the other end of the pull switch is connected to the connection point of the resistor of the current position signal generator and the resistor of the later stage position signal generator.
4. The intelligent recognition system for the position state of a pull switch of a belt conveyor according to claim 3, wherein: the position state identifier determines the operation state of the pull-cord switch by calculating the change of the resistance value according to the signal received from the position signal generator.
5. The intelligent recognition system for the position state of a pull switch of a belt conveyor according to claim 1, wherein: four-wire system wiring modes are adopted among the position signal generator, the position state identifier, the loop state monitoring resistor and the power supply module.
6. The intelligent recognition system for the position state of a pull switch of a belt conveyor according to claim 1, wherein: the position state identifier further comprises a DCS alarm, the DCS alarm is communicated with the PLC through an RS485 interface, and data exchange is carried out by adopting a Modbus protocol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323204131.5U CN220962220U (en) | 2023-11-27 | 2023-11-27 | Intelligent recognition system for position state of pull switch of belt conveyor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323204131.5U CN220962220U (en) | 2023-11-27 | 2023-11-27 | Intelligent recognition system for position state of pull switch of belt conveyor |
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| Publication Number | Publication Date |
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| CN220962220U true CN220962220U (en) | 2024-05-14 |
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| CN202323204131.5U Active CN220962220U (en) | 2023-11-27 | 2023-11-27 | Intelligent recognition system for position state of pull switch of belt conveyor |
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| CN (1) | CN220962220U (en) |
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2023
- 2023-11-27 CN CN202323204131.5U patent/CN220962220U/en active Active
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