Automatic control device of belt conveyor

Abstract

The invention discloses an automatic control device for a belt conveyor. The automatic control device comprises a device control core single-chip microcomputer, a fault alarm device and an operation state display device, wherein the fault alarm device and the operation state display device are connected with the device control core single-chip microcomputer; the device control core single-chip microcomputer is connected with a power supply circuit, an interface input circuit, an interface output circuit and a solid-state relay execution circuit. The fault alarm device comprises a sound alarm connected with the control core single chip microcomputer, a liquid crystal Chinese character display alarm and a sensor group arranged on the belt conveyor; the operation state display device comprises an operation state liquid crystal display screen connected with the control core single-chip microcomputer. According to the invention, through real-time continuous measurement and acquisition of various protection sensors on site, after comprehensive processing of the single-chip microcomputer, on one hand, start-stop control, fault protection and sound alarm of a control switch of the adhesive tape dragging motor are completed; on the other hand, the operation condition of the whole belt conveyor is displayed through the liquid crystal display.

Description

Technical Field

[0001] The invention relates to the technical field of belt conveyor control, in particular to an automatic control device for a belt conveyor. Background Art

[0002] The existing belt conveyor control devices on the market mainly include analog circuit control, single-chip microcomputer control, and PLC control. Analog circuits have low costs and single functions and have gradually withdrawn from the market. PLCs have full functions and strong developability, but are expensive and not conducive to low-cost mass production. Based on single-chip microcomputer control, the quality and functions of the current market are uneven. Therefore, the market urgently needs a low-cost, full-featured belt conveyor automatic control device. Summary of the invention

[0003] In order to solve the above technical problems, the technical solution provided by the present invention is: a belt conveyor automatic control device, including a device control core single chip microcomputer and a fault alarm device and an operation status display device connected to the device control core single chip microcomputer; the device control core single chip microcomputer is connected to a power supply circuit, an interface input circuit, an interface output circuit and a solid-state relay execution circuit; the fault alarm device includes a sound alarm connected to the control core single chip microcomputer, a liquid crystal Chinese character display alarm and a sensor group arranged on the belt conveyor; the operation status display device includes an operation status liquid crystal display screen connected to the control core single chip microcomputer.

[0004] The advantages of the present invention over the prior art are: the present invention realizes the start and stop control, fault protection and voice alarm of the belt drag motor control switch through real-time continuous measurement and collection of various protection sensors on site, and after comprehensive processing by a single-chip microcomputer; on the other hand, the operation status of the entire belt conveyor is displayed through a liquid crystal display. The present invention has the functions of voice fault alarm and operation status display. The protection functions of the device of the present invention include coal position, deviation, low speed, temperature, smoke, emergency stop, tearing, tension, over-temperature watering, etc., and it also has a 485 interface that can be networked with other devices to form a system. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 The utility model is a connection schematic diagram of a belt conveyor automatic control device of the present invention.

[0006] Figure 2 The invention discloses a connection diagram of a sensor group and a core single chip microcomputer of a belt conveyor automatic control device.

[0007] Figure 3 The invention discloses a connection diagram of multiple groups of device control core single chip computers in a belt conveyor automatic control device. DETAILED DESCRIPTION

[0008] In order to make the purpose, 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 in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0009] In the description of the embodiments of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invented product is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0010] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0011] In the description of the embodiments of the present invention, "plurality" means at least 2.

[0012] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0013] Example:

[0014] Combined with Figure 1-3This embodiment discloses an automatic control device for a belt conveyor, including a device control core single chip microcomputer, a fault alarm device connected to the device control core single chip microcomputer, and an operation status display device; the device control core single chip microcomputer is connected to a power supply circuit, an interface input circuit, an interface output circuit, and a solid-state relay execution circuit; the fault alarm device includes a sound alarm connected to the control core single chip microcomputer, a liquid crystal Chinese character display alarm, and a sensor group arranged on the belt conveyor; the operation status display device includes an operation status liquid crystal display screen connected to the control core single chip microcomputer.

[0015] The sensor group includes a speed sensor, a temperature sensor, a smoke sensor, a coal pile sensor, a tearing sensor and a tension sensor; the fault alarm device also includes a ball valve, an emergency stop switch and a deviation switch.

[0016] The wiring terminals of the ball valve, power supply +, signal output K, power supply - are connected one by one with the intrinsically safe wiring terminals of the device control core single chip, power supply +, ball valve output K, power supply -;

[0017] The speed sensor's wiring terminals power supply +, signal output K, power supply - are connected to the device control core microcontroller's intrinsically safe wiring terminals power supply +, speed SD, power supply - in a one-to-one correspondence;

[0018] The temperature sensor's terminals power supply +, signal output K, power supply - are connected to the device's control core microcontroller's intrinsically safe terminals power supply +, temperature WD, power supply - in a one-to-one correspondence;

[0019] The terminals of the smoke sensor, power supply +, signal output K, power supply -, are connected one by one with the intrinsically safe terminals of the device control core single chip, power supply +, smoke YW, power supply -;

[0020] The wiring terminals of the coal pile sensor, power supply +, signal output K, power supply -, are connected one by one with the intrinsically safe wiring terminals of the device control core single chip, power supply +, coal pile DM, power supply -;

[0021] The wiring terminals of the tear sensor, power supply +, signal output K, power supply - are connected one by one with the intrinsically safe wiring terminals of the device control core single chip, power supply +, longitudinal tear input SL, power supply -;

[0022] The connection terminals power supply +, signal output K, power supply - of the tension sensor are connected one by one with the intrinsically safe connection terminals power supply +, tension sensor ADin, power supply - of the device control core single chip microcomputer.

[0023] There are multiple emergency stop switches, which are connected in parallel. At the same time, the wiring terminals power supply +, signal output K, and power supply - of the emergency stop switches are connected one by one with the intrinsically safe wiring terminals power supply +, emergency stop JT, and power supply - of the device control core microcontroller.

[0024] There are multiple deviation switches, which are connected in parallel. At the same time, the connection terminals of the deviation switches, power supply +, signal output K, power supply -, are connected one by one with the intrinsically safe connection terminals of the device control core microcontroller, power supply +, deviation PP, power supply -.

[0025] The core single chip microcomputer of the device control and each sensor are connected by a flame retardant rubber sheathed cable used in mining; and each sensor is connected by an aviation plug.

[0026] The operating status LCD screen is provided with six buttons, including "start", "stop", "set", "switch", "up" and "down".

[0027] When there are multiple belt conveyors, the device control core microcontrollers of the multiple belt conveyors are connected in the direction opposite to the coal flow, and the intrinsically safe wiring terminals power +, online output LJO, and power - of the previous device control core microcontroller are connected one by one with the intrinsically safe wiring terminals power +, online input LJI, and power - of the next device control core microcontroller.

[0028] 1. In specific implementation, the control method of this device is:

[0029] (1) The alarm mode of this device is sound alarm and LCD Chinese character display alarm; when the conveyor stops due to a fault alarm during operation: if the fault is not eliminated, the alarm sound will stop after the set time delay, and the fault display will remain; if the fault is eliminated, the alarm sound will stop immediately, but the fault display will remain, and you can switch to the standby page after pressing the stop button; in the standby state, the fault alarm will stop after the set time delay, and if the fault is not eliminated, the fault display will remain; after the fault is eliminated, you can switch to the standby page.

[0030] (2) Vehicle start warning:

[0031] When there is only one conveyor: When the conveyor is started in the non-"emergency stop lock" and "longitudinal tear protection" states, the device emits a warning sound of "prepare to start, please pay attention"; and displays the corresponding Chinese characters and the start-up timer.

[0032] When there are multiple conveyors under centralized control: when the current conveyor has a start signal and this device is in "centralized control allowed", the device will issue a warning sound of "centralized control start, please pay attention"; and display the corresponding Chinese prompt words and the start-up time; during this process, pressing the "Stop" button can end the centralized control start, stop the voice alarm, and enter the centralized control standby page.

[0033] (3) Low-speed skidding:

[0034] When the conveyor belt speed is lower than 70% Ve (Ve is the rated belt speed), the machine should issue an alarm of "low-speed slip alarm" and display the warning words of "low-speed slip alarm" and the current speed value; after the delay setting time, the machine should issue an alarm of "low-speed slip protection" and display the warning words of "low-speed slip protection", and stop the operation of the belt conveyor at the same time; the device should not have an alarm action for speed changes caused by the normal start and stop of the belt conveyor.

[0035] (4) Overspeed skidding:

[0036] When the conveyor belt speed is higher than 110% Ve (Ve is the rated belt speed), the machine should issue an "overspeed slip alarm" alarm and display the warning words "overspeed slip alarm" and the current speed value; after the delay setting time, the machine should issue an "overspeed slip protection" alarm and display the warning words "overspeed slip protection", and stop the operation of the belt conveyor. The device should not have an alarm action for speed changes caused by normal starting and stopping of the belt conveyor.

[0037] (5) Coal Pile:

[0038] When the feeler rod of the coal pile sensor continuously detects that the coal level exceeds the preset position and the deflection angle of the feeler rod reaches 20±3° (the feeler rod operating force ≤9.8N); the device should issue an alarm sound of "coal pile alarm" and display the warning words of "coal pile alarm" and a delay countdown; after the delay setting time, the device should issue an alarm sound of "coal pile protection" and display the warning words of "coal pile protection"; and at the same time stop the operation of the belt conveyor.

[0039] (6) Deviation:

[0040] When the probe rod of the deviation sensor detects (when the deflection angle of the probe rod reaches 30°±3°) that the running conveyor belt is deviating (the probe rod action force is 20~100N), the device should issue an alarm of "deviation alarm" and display the warning words of "deviation alarm" and a delay countdown; after the delay setting time, the device should issue an alarm of "deviation protection" and display the warning words of "deviation protection"; and at the same time stop the operation of the belt conveyor.

[0041] (7) Temperature:

[0042] When the temperature measured by the temperature sensor at the temperature measuring point exceeds the set value, the device should issue an alarm of "over-temperature protection, start the sprinkler device" and display the corresponding warning words; at the same time, stop the operation of the belt conveyor and open the sprinkler valve of the belt conveyor.

[0043] (8) Smoke:

[0044] When the smoke sensor detects that the smoke concentration in the measured environment is greater than 0.1 mg / m 3 When the device is in operation, it will send out an alarm of "smoke alarm, start the sprinkler" and display the corresponding warning words. At the same time, the belt conveyor will be stopped and the sprinkler valve of the belt conveyor will be opened.

[0045] (9) Tear:

[0046] When the tear sensor detects that the running conveyor belt has longitudinal tear, the device shall issue an alarm of "longitudinal tear protection" and display corresponding warning words. At the same time, the operation of the belt conveyor shall be stopped.

[0047] (10) Emergency stop:

[0048] For a running conveyor, when the emergency stop switch is pulled and self-locked, the device shall emit an “emergency stop locked” alarm and display corresponding warning words, and at the same time stop the operation of the belt conveyor.

[0049] 2. In specific use:

[0050] 1. The usage of a single belt conveyor is as follows:

[0051] a: Make sure the emergency stop switch has been reset, the tear sensor is not working, the temperature sensor and smoke sensor are not working, and the coal pile sensor has been reset; the host is in standby mode.

[0052] b: Press the "Start" button, the device will emit a warning sound of "Prepare to start, please pay attention"; and display the corresponding Chinese prompt words and the start-up timer. When the start-up alarm delay time ends, the start-up warning stops, and the main motor is energized and runs.

[0053] c: After the main engine is running, the emergency stop protection, over-temperature protection, smoke protection, tearing protection, coal pile protection, deviation protection, and overspeed slip protection are put into operation. When the delay reaches the slip protection delay setting value, the low-speed slip protection is also put into operation.

[0054] d: Press the "Stop" button, the host stops normally and enters the standby state.

[0055] e: If the protection is activated during the normal operation of the main engine, any action of emergency stop, over-temperature, smoke, tearing, coal pile, deviation, slipping, and overspeed will cause the main engine to disconnect, stop due to fault, and enter the standby state. After troubleshooting, press the "Stop" button to clear the fault record, and press the "Start" button to start again. If the protection is released, after the emergency stop and tearing action, the main engine will disconnect, stop due to fault, and enter the standby state. After troubleshooting, press the "Stop" button to clear the fault record, and press the "Start" button to start again. The main engine can still operate normally after over-temperature, smoke, coal pile, deviation, slipping, and overspeed.

[0056] 2. Use in centralized control mode:

[0057] a: Make sure the emergency stop switch has been reset, the tear sensor is not in action, if it has been set to "protection input", make sure the temperature sensor and smoke sensor are not in action, and the coal pile sensor has been reset. The host is in standby mode. Display centralized control is prohibited.

[0058] b: If the front machine is already running, the machine displays "centralized control allowed". At this time, press the "start" button, the machine will issue a warning tone of "centralized control start, please pay attention", and display the corresponding Chinese characters and the start time. When the start alarm delay time ends, the start warning stops, and the main motor is powered on.

[0059] c: After the main engine is running, the emergency stop protection, over-temperature protection, smoke protection, tearing protection, coal pile protection, deviation protection, and overspeed slip protection are put into operation. When the delay reaches the slip protection delay setting value, the low-speed slip protection is also put into operation.

[0060] d: Press the "Stop" button, the motor is disconnected, and the host stops normally. At this time, if the front machine is still running, the host displays "centralized control allowed" and enters the standby state. Press the "Start" button to start again. If the front machine has stopped, the host displays "centralized control prohibited" and the machine cannot be started.

[0061] e: In the online operation state, if the front desk stops, the machine will stop normally, display centralized control prohibited, and enter the standby state.

[0062] f: If the protection is activated during the normal operation of the online machine, the motor of the machine will be disconnected and the machine will stop if any of the following actions occur: emergency stop, over-temperature, smoke, tearing, coal piling, deviation, slipping, or over-speed. After troubleshooting, press the "Stop" button to clear the fault record. At this time, if the front machine is still running, the host will display that the centralized control is allowed and enter the standby state. Press the "Start" button to start again. If the front machine has stopped, the host will display that the centralized control is prohibited, and the machine cannot be started. If the protection is released, after the emergency stop or tearing action, the motor of the host will be disconnected and the machine will stop if the fault occurs. After troubleshooting, press the "Stop" button to clear the fault record. At this time, if the front machine is still running, the host will display that the centralized control is allowed and enter the standby state. Press the "Start" button to start again. If the front machine has stopped, the host will display that the centralized control is prohibited, and the machine cannot be started. The host can still operate normally after over-temperature, smoke, coal piling, deviation, slipping, or over-speed.

[0063] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A belt conveyor automatic control device, characterized in that: It includes a device control core single chip microcomputer, a fault alarm device connected to the device control core single chip microcomputer, and an operation status display device; the device control core single chip microcomputer is connected to a power supply circuit, an interface input circuit, an interface output circuit and a solid-state relay execution circuit; the fault alarm device includes a sound alarm connected to the control core single chip microcomputer, a liquid crystal Chinese character display alarm and a sensor group arranged on the belt conveyor; the operation status display device includes an operation status liquid crystal display screen connected to the control core single chip microcomputer.

2. The automatic control device for a belt conveyor according to claim 1, characterized in that: The sensor group includes a speed sensor, a temperature sensor, a smoke sensor, a coal pile sensor, a tearing sensor and a tension sensor; the fault alarm device also includes a ball valve, an emergency stop switch and a deviation switch.

3. The automatic control device for a belt conveyor according to claim 2, characterized in that: The wiring terminals of the ball valve, power supply +, signal output K, power supply - are connected one by one with the intrinsically safe wiring terminals of the device control core single chip, power supply +, ball valve output K, power supply -; The speed sensor's wiring terminals power supply +, signal output K, power supply - are connected to the device control core microcontroller's intrinsically safe wiring terminals power supply +, speed SD, power supply - in a one-to-one correspondence; The temperature sensor's terminals power supply +, signal output K, power supply - are connected to the device's control core microcontroller's intrinsically safe terminals power supply +, temperature WD, power supply - in a one-to-one correspondence; The terminals of the smoke sensor, power supply +, signal output K, power supply -, are connected one by one with the intrinsically safe terminals of the device control core single chip, power supply +, smoke YW, power supply -; The wiring terminals of the coal pile sensor, power supply +, signal output K, power supply -, are connected one by one with the intrinsically safe wiring terminals of the device control core single chip, power supply +, coal pile DM, power supply -; The wiring terminals of the tear sensor, power supply +, signal output K, power supply - are connected one by one with the intrinsically safe wiring terminals of the device control core single chip, power supply +, longitudinal tear input SL, power supply -; The connection terminals power supply +, signal output K, power supply - of the tension sensor are connected one by one with the intrinsically safe connection terminals power supply +, tension sensor ADin, power supply - of the device control core single chip microcomputer.

4. The automatic control device for a belt conveyor according to claim 2, characterized in that: There are multiple emergency stop switches, which are connected in parallel. At the same time, the wiring terminals power supply +, signal output K, and power supply - of the emergency stop switches are connected one by one with the intrinsically safe wiring terminals power supply +, emergency stop JT, and power supply - of the device control core microcontroller.

5. The automatic control device for a belt conveyor according to claim 2, characterized in that: There are multiple deviation switches, which are connected in parallel. At the same time, the connection terminals of the deviation switches, power supply +, signal output K, power supply -, are connected one by one with the intrinsically safe connection terminals of the device control core microcontroller, power supply +, deviation PP, power supply -.

6. The automatic control device for a belt conveyor according to claim 1, characterized in that: The core single chip microcomputer of the device control and each sensor are connected by a flame retardant rubber sheathed cable used in mining; and each sensor is connected by an aviation plug.

7. The automatic control device for a belt conveyor according to claim 1, characterized in that: The operating status LCD screen is provided with six buttons, including "start", "stop", "set", "switch", "up" and "down".

8. The automatic control device for a belt conveyor according to claim 1, characterized in that: When there are multiple belt conveyors, the device control core microcontrollers of the multiple belt conveyors are connected in the direction opposite to the coal flow, and the intrinsically safe wiring terminals power +, online output LJO, and power - of the previous device control core microcontroller are connected one by one with the intrinsically safe wiring terminals power +, online input LJI, and power - of the next device control core microcontroller.

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