CN211337704U - Under-speed detection device of belt conveyor - Google Patents
Under-speed detection device of belt conveyor Download PDFInfo
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- CN211337704U CN211337704U CN201922238453.9U CN201922238453U CN211337704U CN 211337704 U CN211337704 U CN 211337704U CN 201922238453 U CN201922238453 U CN 201922238453U CN 211337704 U CN211337704 U CN 211337704U
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Abstract
The utility model discloses a belt conveyor underspeed detection device, which comprises a main control unit, an alarm unit, a detection unit and a man-machine interaction unit; the detection unit comprises a first sensing device arranged on the roller and a second sensing device arranged on a beam on the periphery of the roller, and when the roller rotates to a set position, the second sensing device is over against the first sensing device; the second sensing device, the alarm unit and the man-machine interaction unit are all in communication connection with the main control unit, and the main control unit is also in communication connection with the switch unit of the belt conveyor. The first sensing device and the second sensing device convert the rotating speed of the roller into pulse signals, the pulse signals are judged in real time through the main control unit, the slipping fault of the belt conveyor is found in time, and the belt conveyor is shut down; and a critical alarm value can be set through a human-computer interaction unit, so that the belt conveyor can be monitored under different working conditions, and the application range of the under-speed detection device of the belt conveyor is widened.
Description
Technical Field
The utility model relates to a belt conveyor technical field especially relates to a belt conveyor is owing fast detection device.
Background
The belt conveyor is mainly used for conveying mined raw coal in a coal mine, because dust is large in the working face, the belt conveyor is in the operation process, after a large amount of dust is adsorbed on the contact surface of the conveying rubber belt and the roller, slipping can occur between the conveying rubber belt and the roller due to undersize of friction force, and if the belt conveyor is not found to slip in time, a large amount of raw coal can be retained on the working face, so that the production process is influenced. Therefore, it is necessary to provide an underspeed detection device for a belt conveyor, which can accurately detect whether a conveyor belt slips or not between a conveyor belt and a drum.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art and have the not enough of whether skidding between unable accurate detection conveyor belt and the cylinder, provide a belt conveyor that can accurately detect whether skidding between conveyor belt and the cylinder and owe fast detection device.
The technical scheme of the utility model provides a belt conveyor speed shortage detection device, which comprises a main control unit, an alarm unit, a detection unit and a man-machine interaction unit;
the detection unit comprises a first sensing device arranged on a roller of the belt conveyor and a second sensing device arranged on a beam on the periphery of the roller, and when the roller rotates to a set position, the second sensing device is over against the first sensing device;
the second sensing device, the alarm unit and the human-computer interaction unit are all in communication connection with the main control unit, and the main control unit is also in communication connection with a switch unit of the belt conveyor.
In one embodiment, the first sensing device is a sensing metal sheet, and the second sensing device is an electromagnetic sensor.
Further, the shortest distance between the first induction device and the second induction device is not more than 15 mm.
Further, the first sensing device is mounted on the outer circumferential surface of the drum, and the second sensing device is mounted on a cross beam parallel to the axial direction of the drum.
In one embodiment, the first sensing device is an infrared transmitter and the second sensing device is an infrared receiver.
Furthermore, the first sensing device is installed on one end surface of the roller, and the second sensing device is correspondingly installed on the cross beam at one end where the first sensing device is located.
Further, the main control unit is connected with a switch unit of the belt conveyor through a relay.
Further, the human-computer interaction unit is a computer or a mobile terminal.
Further, the main control unit is a programmable logic controller.
Further, the alarm unit is a loudspeaker, an indicator light and/or a display screen.
After adopting above-mentioned technical scheme, have following beneficial effect:
in the utility model, when the roller drives the first sensing device to rotate to align with the second sensing device, the second sensing device sends a pulse signal to the main control unit, when the period of the pulse signal is too small, the main control unit judges that the belt conveyor skids, and the alarm unit gives an alarm and/or closes the switch unit of the belt conveyor; the rotating speed of the roller is converted into a pulse signal, the main control unit is used for judging, the pulse signal can be judged in real time, and the slipping fault of the belt conveyor can be found in time;
the utility model discloses go back accessible human-computer interaction unit, according to belt conveyor's operational aspect, set for judgment method and critical alarm value in the main control unit, can realize the monitoring of belt conveyor under different work forms to improve belt conveyor and owe fast detection device's application scope.
Drawings
The disclosure of the present invention will become more readily understood by reference to the drawings. It should be understood that: these drawings are for illustrative purposes only and are not intended to limit the scope of the present disclosure. In the figure:
fig. 1 is a schematic structural view of an underspeed detection device of a belt conveyor according to an embodiment of the present invention;
fig. 2 is a schematic view illustrating the installation of the detecting unit according to an embodiment of the present invention.
Detailed Description
The following describes the present invention with reference to the accompanying drawings.
It is easily understood that, according to the technical solution of the present invention, a plurality of structural modes and implementation modes that can be mutually replaced by those of ordinary skill in the art can be achieved without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are only exemplary illustrations of the technical solutions of the present invention, and should not be construed as limiting or restricting the technical solutions of the present invention in its entirety or as a limitation of the present invention.
The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms.
The belt conveyor underspeed detection device in this embodiment, as shown in fig. 1, includes a main control unit 01, an alarm unit 02, a detection unit 03, and a human-computer interaction unit 04;
as shown in fig. 2, the detecting unit 03 includes a first sensing device 31 mounted on the drum 100 of the belt conveyor and a second sensing device 32 mounted on the cross beam 200 at the periphery of the drum 100, and when the drum 100 rotates to a set position, the second sensing device 32 faces the first sensing device 31;
the second sensing device 32, the alarm unit 02 and the human-computer interaction unit 04 are all in communication connection with the main control unit 01, and the main control unit 01 is also in communication connection with the switch unit 05 of the belt conveyor.
The first sensing device 31 rotates synchronously with the roller 100, the second sensing device 32 is fixed on the beam 200, and when the first sensing device 31 rotates to a set position and faces the second sensing device 32, the second sensing device 32 senses that the first sensing device 31 sends a pulse signal to the main control unit 01, namely, when the roller 100 rotates for a circle, the pulse signal is sent to the main control unit 01, and the rotating speed of the roller 100 is converted into the pulse signal.
The output end of the second sensing device 32 is in communication connection with the first input end of the main control unit 01, and the main control unit 01 receives the pulse signal sent by the second sensing device 32 and calculates, analyzes and judges the period of the pulse signal. The main control unit 01 judges whether the rotating speed of the roller 100 exceeds an alarm critical value according to a preset alarm critical value, and if the rotating speed exceeds the alarm critical value, the rotating speed is insufficient for slipping between the roller 100 and a conveying rubber belt.
Specifically, according to the rotating speed of the roller and the circumference of the roller when the belt conveyor normally operates, the method comprises the following steps: and T is C/V, wherein C refers to the circumference of the roller, V refers to the rotating speed of the roller, and the time T of one rotation of the roller in normal operation is calculated. The value of T is set as an alarm critical value of the pulse period, the alarm critical value can allow the error of a normal range, and the maximum error range is not more than 10 percent. In the embodiment, the period of the pulse signal is set between T (1-10%) and T (1+ 10%) for normal operation of the roller; when the period of the pulse signal is less than T (1-10%), judging that the transportation rubber belt is under-slid; when the period of the pulse signal is greater than T (1+ 10%), it is determined that the second sensing device 32 or the belt conveyor is malfunctioning.
The principle of making the above judgment is that when the transportation tape slips at an insufficient speed, the friction force between the roller and the transportation tape is reduced, so that the rotating speed of the roller is increased, and therefore the pulse period sent by the second sensing device 32 is reduced; when the pulse period is longer, it indicates that the rotation speed of the drum is slower, which has two reasons, that is, the rotation speed is slower due to the failure of the drum, and that the second sensing device 32 fails, and if the second sensing device 32 employs an electromagnetic sensor, the second sensing device 32 may be stuck by a metal material.
Further, the second sensing device 32 and the first sensing device 31 may respond by electromagnetic induction or by transmitting a signal.
In the present embodiment, the response is realized by electromagnetic induction, wherein the first induction device 31 is set as an induction metal sheet, and the second induction device 32 is set as an electromagnetic sensor, and in order to ensure the detection accuracy, the shortest distance between the first induction device 31 and the second induction device 32 is not greater than 15 mm. As shown in fig. 2, the first sensing device 31 is installed at an edge of one end surface of the drum 100, the second sensing device 32 is correspondingly installed on the cross member 200 at one end of the first sensing device 31, and the second sensing device 32 is disposed toward one side of the drum.
The induction of adopting electromagnetic induction is comparatively sensitive, and detection accuracy is higher. Alternatively, the first sensing device 31 may also be disposed on the outer circumferential surface of the drum 100, and then the second sensing device 32 is disposed on a beam parallel to the axial direction of the drum 100, and it is necessary to ensure that, when the first sensing device 31 faces the second sensing device 32, the first sensing device 31 is not covered by the conveyor belt, that is, the second sensing device 32 is mounted on the beam in the annular space formed by the conveyor belt.
Alternatively, if the response is realized by using the transmission signal, the first sensing device 31 may be an infrared transmitter, and the second sensing device 32 may be an infrared receiver. The infrared signal transmission speed is fast and the transmission distance is long, and the distance between infrared transmitter and infrared receiver does not have strict restriction, can be applicable to different installation environment. Since the ir emitter is a convex structure, if it is installed on the outer circumferential surface of the drum 100, it will affect the transmission of the conveying belt, so the first sensing device 31 can only be installed on the end surface of the drum 100, the corresponding second sensing device 32 is installed on the cross beam 200 at the end where the first sensing device 31 is located, and the second sensing device 32 is disposed toward one side of the drum.
In this embodiment, the main control unit 01 employs a Programmable Logic Controller (PLC), which is configured with a microprocessor inside for automatic control, and can load the control instruction into a memory at any time for storage and execution, so as to adjust the determination program at any time according to the operation condition of the belt conveyor.
The man-machine interaction device 04 realizes adjustment of the judgment program in the main control unit 01, and can modify the alarm critical value according to the rotating speed of the rubber belt conveyor so as to adapt to different working states. The human-computer interaction device 04 comprises input devices such as a keyboard and a touch screen and output devices such as a liquid crystal display screen, and can adopt a computer or a tablet, a mobile phone and other mobile terminals.
When the main control unit 01 judges the pulse period and judges that the transportation rubber belt is under-speed and skids, the main control unit 02 sends a signal to the alarm unit 02 to control the alarm unit 02 to send corresponding alarm information, meanwhile, the main control unit 02 also sends a signal to the switch unit 05 of the belt conveyor to control the switch unit 05 to cut off the power supply of the belt conveyor to stop the operation of the belt conveyor; when the main control unit 02 judges that the second sensing device 32 or the belt conveyor has a fault, a signal is sent to the alarm unit 02, and the alarm unit 02 is controlled to send out corresponding alarm information to remind a worker to overhaul.
Wherein, the alarm unit 02 is a speaker, an indicator light, and/or a display screen, and an audio alarm, a photoelectric alarm, or a combination of the two can be selected according to the device arrangement. Optionally, the alarm unit 02 may also be integrated in the human-computer interaction unit 04, for example, if the human-computer interaction unit 04 is a computer equipped with a keyboard and a display screen, the display screen may be used as the alarm unit 02. The main control unit 01 is connected with the switch unit 05 of the belt conveyor through a relay, and the on-off of the switch unit 05 is controlled through the relay.
In the device for detecting the underspeed of the belt conveyor in the embodiment, the detection unit 03 detects the time of one rotation of the drum 100 and feeds the time to the main control unit 01 in the form of a pulse signal, the main control unit 01 analyzes and judges the period of the pulse signal, and if the judgment result shows that the conveying belt is underspeed and skidd, the belt conveyor is controlled to stop running and simultaneously gives an alarm, and if the judgment result shows that the belt conveyor or the detection unit 03 is in failure, the alarm is given to remind a worker.
The alarm critical value and the judgment method in the main control unit 01 can be modified through the man-machine interaction unit 04 so as to adapt to the detection of the belt conveyor under different working states.
What has been described above is merely the principles and preferred embodiments of the present invention. It should be noted that, for those skilled in the art, on the basis of the principle of the present invention, several other modifications can be made, and the protection scope of the present invention should be considered.
Claims (10)
1. The under-speed detection device of the belt conveyor is characterized by comprising a main control unit, an alarm unit, a detection unit and a human-computer interaction unit;
the detection unit comprises a first sensing device arranged on a roller of the belt conveyor and a second sensing device arranged on a beam on the periphery of the roller, and when the roller rotates to a set position, the second sensing device is over against the first sensing device;
the second sensing device, the alarm unit and the human-computer interaction unit are all in communication connection with the main control unit, and the main control unit is also in communication connection with a switch unit of the belt conveyor.
2. The belt conveyor underspeed detection apparatus of claim 1, wherein the first induction device is an induction metal sheet and the second induction device is an electromagnetic sensor.
3. The belt conveyor underspeed detection apparatus of claim 2, wherein a shortest distance between the first sensing device and the second sensing device is no greater than 15 millimeters.
4. The belt conveyor underspeed detection apparatus according to claim 1, wherein the first sensing device is mounted on an outer peripheral surface of the drum, and the second sensing device is mounted on a cross member parallel to an axial direction of the drum.
5. The belt conveyor underspeed detection apparatus of claim 1, wherein the first sensing device is an infrared transmitter and the second sensing device is an infrared receiver.
6. The belt conveyor underspeed detection device of claim 1, wherein the first sensing device is mounted on an end surface of the roller, and the second sensing device is correspondingly mounted on a cross beam at an end of the first sensing device.
7. The belt conveyor underspeed detection device of any one of claims 1-6, wherein the main control unit is connected with a switch unit of the belt conveyor through a relay.
8. The belt conveyor underspeed detection apparatus according to any one of claims 1-6, wherein the human-computer interaction unit is a computer or a mobile terminal.
9. The belt conveyor underspeed detection apparatus of any one of claims 1-6, wherein the main control unit is a programmable logic controller.
10. The belt conveyor underspeed detection apparatus of any one of claims 1-6, characterized in that the alarm unit is a speaker, an indicator light, and/or a display screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922238453.9U CN211337704U (en) | 2019-12-13 | 2019-12-13 | Under-speed detection device of belt conveyor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922238453.9U CN211337704U (en) | 2019-12-13 | 2019-12-13 | Under-speed detection device of belt conveyor |
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| Publication Number | Publication Date |
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| CN211337704U true CN211337704U (en) | 2020-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922238453.9U Active CN211337704U (en) | 2019-12-13 | 2019-12-13 | Under-speed detection device of belt conveyor |
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| CN (1) | CN211337704U (en) |
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