Underground mine belt conveyor with speed sensing function

Abstract

The utility model provides an under-mine belt conveyor with a speed sensing function, which comprises a conveyor belt arranged in a roadway with a gradient, and a plurality of light beam emitters arranged on the side edge part of the conveyor belt at intervals; a first photoelectric conversion module matched with the light beam emitter in position is arranged at the upper part of the conveying belt; a pulse generation circuit and a single chip microcomputer are arranged in the control box; the pulse generation circuit is in communication connection with the first photoelectric conversion module, and the pulse generation circuit receives the electric signal and converts the electric signal into a pulse signal; the single-chip microcomputer is connected with the pulse generating circuit and obtains the running speed of the conveying belt based on the number of the pulse signals. The PLC is in communication connection with the single-chip microcomputer to obtain the running speed of the conveying belt, and the running speed of the conveying belt is controlled through the frequency converter. The speed detection device can detect the running speed of the conveyor belt, discover abnormal conditions of the speed in time and guarantee stable running of the belt conveyor.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of mine belt conveyer, especially relates to a mine belt conveyer with speed induction. BACKGROUND

[0002] The belt conveyer used in the mine needs to transport coal gangue. Due to the influence of the carried heavy object and the running slope, the phenomenon of runaway sliding may occur. When the conveying belt slides rapidly, the friction between the conveying belt and the components such as the roller and the carrier roller is intensified, which increases the wear degree of the conveying belt. Long-term rapid sliding may also cause plastic deformation and elongation of the conveying belt, thereby shortening the service life of the conveying belt. Even it may cause belt breakage and tearing accidents.

[0003] In addition, sliding may also cause damage to other components, such as damage to the roller bearing, damage to the carrier roller, damage to the protection sensor, etc., increasing the maintenance cost of the equipment. At the same time, if the conveying belt slides too fast, it may cause a large amount of coal gangue to accumulate at the unloading point of the previous conveying machine, affecting the normal operation of the system.

[0004] How to sense the running speed of the conveying belt to ensure the stable operation of the belt conveyer and avoid the increase of the wear degree of the conveying belt due to rapid sliding of the conveying belt is a technical problem to be solved at present. CONTENT OF THE UTILITY MODEL

[0005] The utility model provides a mine belt conveyer with speed induction, which can sense the phenomenon of runaway sliding of the conveying belt in time and ensure the stable operation of the belt conveyer.

[0006] The mine belt conveyer with speed induction comprises a conveying belt arranged in a slope roadway and a control box, the bottom of the conveying belt is provided with a conveying roller which runs synchronously with the conveying belt; one end of the conveying belt is provided with a driving roller, the driving roller is connected with a driving motor; the driving motor is connected with a frequency converter; the frequency converter is connected with a PLC controller; a plurality of light beam emitters are arranged at intervals on the side of the conveying belt;

[0007] A first photoelectric conversion module matched with the light beam emitters is arranged on the upper part of the conveying belt;

[0008] A pulse generating circuit and a single-chip microcomputer are arranged in the control box;

[0009] The pulse generating circuit is in communication connection with the first photoelectric conversion module, the pulse generating circuit receives the electric signal and converts the electric signal into a pulse signal;

[0010] The single-chip microcomputer is connected with the pulse generating circuit, and the running speed of the conveying belt is obtained based on the number of pulse signals;

[0011] The PLC controller is in communication connection with the single-chip microcomputer, obtains the running speed of the conveying belt, and controls the running speed of the conveying belt through the frequency converter.

[0012] Preferably, the middle part of the conveying roller is provided with a rotating shaft, and an optical encoder is installed on the rotating shaft; a plurality of gratings are arranged on the optical encoder, one end of the optical encoder is provided with a light source, and the other end of the optical encoder is provided with a light baffle, a light transmission hole matched with the grating is arranged on the light baffle, and a photosensitive module is arranged close to one side of the light transmission hole.

[0013] The photosensitive module is connected with a second photoelectric conversion module.

[0014] The single-chip microcomputer is in communication connection with the second photoelectric conversion module through a counter and a pulse generation circuit.

[0015] Preferably, the control box is further provided with an amplification circuit and a shaping circuit;

[0016] The single-chip microcomputer is in communication connection with the pulse generation circuit through the amplification circuit and the pulse shaping circuit.

[0017] Preferably, the pulse generation circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a transistor Q1 and an operational amplifier U1.

[0018] The first end of the capacitor C1 is connected with the input end of the pulse generation circuit, the second end of the capacitor C1 is connected with the first end of the resistor R1 and the positive input end of the operational amplifier U1 respectively, and the negative input end of the operational amplifier U1 is connected with the first end of the resistor R2.

[0019] The second end of the resistor R1, the second end of the resistor R2 and the emitter of the transistor Q1 are grounded respectively.

[0020] The output end of the operational amplifier U1 is connected with the base of the transistor Q1 through the resistor R3, the collector of the transistor Q1 is connected with the output end of the pulse generation circuit and the second end of the resistor R4 respectively, and the first end of the resistor R4 is connected with the power supply.

[0021] Preferably, the control box is further provided with a counter; the single-chip microcomputer is in communication connection with the counter, and records the number of pulses generated by the pulse generation circuit.

[0022] Preferably, the counter adopts a 74LS160 counter or a 74LS161 counter.

[0023] The PLC controller adopts a Siemens S7-1200 controller or a Mitsubishi FX series PLC controller.

[0024] Preferably, the operational amplifier U1 adopts an OPA2356 operational amplifier.

[0025] The frequency converter adopts a Siemens MM440 frequency converter or a Mitsubishi FR-E700 frequency converter.

[0026] Preferably, the single-chip microcomputer adopts an STM32 single-chip microcomputer or an ARM microprocessor.

[0027] The light beam emitter adopts an infrared light-emitting diode or a laser diode.

[0028] The first photoelectric conversion module adopts a photoresistor or an avalanche photodiode.

[0029] From the above technical solutions, the utility model has the following advantages:

[0030] The light beam emitter and the first photoelectric conversion module realize speed detection of the conveyor belt in the mine belt conveyor with speed sensing provided by the application. The multiple light beam emitters are arranged at intervals and can detect different positions of the conveyor belt in real time. The first photoelectric conversion module can capture the change of reflected light intensity in time and convert it into an electric signal, and then generate a pulse signal for the single-chip microcomputer to process, so that the monitoring of the running speed of the conveyor belt is more real-time and accurate, and the speed abnormality can be found in time.

[0031] The pulse generation circuit is in communication connection with the first photoelectric conversion module, and the single-chip microcomputer is connected with the pulse generation circuit, so that the speed detection data can be quickly and accurately transmitted to the PLC controller, and the speed of the conveyor belt can be adjusted in time. When the runaway and sliding phenomenon is caused by the influence of the carried heavy objects and the running slope, the phenomenon can be detected and alarmed in time, and handled by the operator in time. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the utility model, the drawings needed to be used in the description will be simply introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings.

[0033] Figure 1 It is a schematic diagram of the mine belt conveyor with speed sensing.

[0034] Figure 2 It is an embodiment schematic diagram of the mine belt conveyor with speed sensing.

[0035] Figure 3 It is a pulse generation circuit diagram. DETAILED DESCRIPTION

[0036] In order to make the purpose, characteristics and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be described clearly and completely in combination with the drawings in the specific embodiments below. Obviously, the embodiments described below are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the patent, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the patent.

[0037] As shown in Figure 1 and Figure 2 The utility model provides a mine under belt conveyor with speed induction, which comprises a conveyor belt 1 arranged in a slope roadway and a control box, and the bottom of the conveyor belt 1 is provided with a conveyor roller 2 which runs synchronously with the conveyor belt 1; one end of the conveyor belt 1 is provided with a driving roller 3, and the driving roller 3 is connected with a driving motor; the driving motor is connected with a frequency converter; and the frequency converter is connected with a PLC controller.

[0038] In the embodiment, the driving roller 3 is arranged at one end of the conveyor belt 1, and a driven roller is arranged at the other end. A plurality of conveyor rollers 2 can be arranged in the middle of the conveyor belt 1, and the conveyor rollers 2 can support the conveyor belt 1.

[0039] Optionally, the PLC controller is a Siemens S7-1200 controller or a Mitsubishi FX series PLC controller. The frequency converter is a Siemens MM440 frequency converter or a Mitsubishi FR-E700 frequency converter.

[0040] In the embodiment, a plurality of light beam emitters 4 are arranged at the side edges of the conveyor belt 1 at intervals. The light beam emitters 4 can be infrared light emitting diodes or laser diodes. Arranging the light beam emitters 4 at the side edges of the conveyor belt 1 can prevent the materials on the conveyor belt 1 from blocking the light beam emitters 4.

[0041] A first photoelectric conversion module 5 is arranged at the upper part of the conveyor belt 1 and matches the light beam emitters 4. The light beam emitters 4 emit light beams to the first photoelectric conversion module 5. The first photoelectric conversion module 5 captures reflected light, detects changes in light intensity and converts them into electrical signals. The first photoelectric conversion module 5 can be a photoresistor or an avalanche photodiode.

[0042] In the embodiment, a counter, a pulse generation circuit and a single-chip microcomputer are arranged in the control box. Optionally, the single-chip microcomputer is an STM32 single-chip microcomputer or an ARM microprocessor.

[0043] The pulse generation circuit is in communication connection with the first photoelectric conversion module 5. The pulse generation circuit receives the electrical signals and converts them into pulse signals.

[0044] It should be noted that the pulse generation circuit converts the electrical signal output by the first photoelectric conversion module 5 into a pulse signal.

[0045] The control box further comprises an amplification circuit and a pulse shaping circuit; the single-chip microcomputer is in communication connection with the pulse generation circuit through the amplification circuit and the pulse shaping circuit. The amplification circuit and the pulse shaping circuit can perform shaping, amplification and other processing on the pulse signal to ensure the stability and accuracy of the signal.

[0046] The counter can count the number of pulses in a unit of time, and the single-chip microcomputer calculates the running speed of the conveying belt according to the counting result and the known proportional relationship between the pulse and the distance.

[0047] The PLC controller is in communication connection with the single-chip microcomputer, and the PLC controller obtains the running speed of the conveying belt 1 and controls the running speed of the conveying belt 1 through the frequency converter.

[0048] The PLC controller can compare the running speed with the set speed threshold value, and control the brake brake and the frequency converter to run when the running speed exceeds the speed threshold value. The brake brake is used to brake the conveying belt 1 when the running speed is overspeed, and the frequency converter is used to control the driving motor to run, which can adjust the running speed of the conveying belt 1 to realize speed reduction or speed increase.

[0049] In this embodiment, the pulse generation circuit converts the electrical signal output by the first photoelectric conversion module into a pulse signal. These pulse signals are then received and processed by the single-chip microcomputer for calculating the running speed of the conveying belt.

[0050] As shown in Figure 3 The pulse generation circuit in this embodiment comprises resistors R1, R2, R3, R4, a capacitor C1, a transistor Q1 and an operational amplifier U1. The first end of the capacitor C1 is connected to the input end of the pulse generation circuit, the second end of the capacitor C1 is connected to the first end of the resistor R1 and the positive input end of the operational amplifier U1, respectively, and the negative input end of the operational amplifier U1 is connected to the first end of the resistor R2. The second end of the resistor R1, the second end of the resistor R2 and the emitter of the transistor Q1 are grounded, respectively. The output end of the operational amplifier U1 is connected to the base of the transistor Q1 through the resistor R3, and the collector of the transistor Q1 is connected to the output end of the pulse generation circuit and the second end of the resistor R4, respectively. The first end of the resistor R4 is connected to the power supply.

[0051] In this embodiment, the pulse generation circuit receives the electrical signal of the first photoelectric conversion module, and performs preprocessing such as resistance voltage division and capacitor C1 filtering on the electrical signal to ensure the stability and accuracy of the electrical signal.

[0052] The preprocessed electrical signal enters the operational amplifier U1, and the operational amplifier U1 adopts an OPA2356 operational amplifier.

[0053] The operational amplifier is used as a comparator. The operational amplifier U1 compares the input electrical signal with a reference voltage. When the input signal exceeds the reference voltage, the operational amplifier U1 outputs a high level; otherwise, a low level.

[0054] The output signal of the operational amplifier U1 controls the conduction and cut-off of the transistor Q1. When the operational amplifier U1 outputs a high level, the transistor Q1 is turned on, thereby generating a pulse signal at the output end; when the operational amplifier U1 outputs a low level, the transistor Q1 is cut off, and the pulse signal disappears.

[0055] Finally, the pulse signal is output to the single-chip microcomputer through the connector at the output end. The single-chip microcomputer can calculate the running speed of the conveyor belt by counting the number of pulse signals.

[0056] It can be seen that the pulse generation circuit converts the electrical signal output by the photoelectric conversion module into a pulse signal, and realizes accurate measurement of the running speed of the conveyor belt through connection with the single-chip microcomputer.

[0057] When the running speed of the conveyor belt exceeds the set speed threshold, an alarm signal can be sent to inform the equipment patrol personnel. The PLC controller can control the frequency converter and the brake to act, ensuring that the conveyor belt stops in time.

[0058] In order to ensure that the running speed of the conveyor belt is obtained, a rotating shaft is arranged in the middle of the conveying roller, which can rotate synchronously with the conveying roller and the conveyor belt. The rotating shaft is installed with a photoelectric encoder; a plurality of gratings are arranged on the photoelectric encoder, one end of the photoelectric encoder is provided with a light source, and the other end of the photoelectric encoder is provided with a light baffle, the light baffle is provided with a light transmission hole matched with the grating, and the light transmission hole is provided with a photosensitive module close to one side; the photosensitive module is connected with a second photoelectric conversion module; the single-chip microcomputer is in communication connection with the second photoelectric conversion module through a counter and a pulse generation circuit.

[0059] The photosensitive module of the embodiment obtains information by detecting the change of the light signal generated by the cooperation of the grating and the light transmission hole, and can accurately measure the rotation angle and speed of the conveying roller, and then accurately obtain the running speed of the conveyor belt.

[0060] The photoelectric encoder is installed on the rotating shaft and rotates synchronously with the conveying roller, which can maintain good working state in the complex environment of the mine and provide speed detection data. In addition to being used for speed measurement, the photoelectric encoder can also realize accurate measurement of the running distance of the conveyor belt through coding and counting of the gratings.

[0061] The single-chip microcomputer is in communication connection with the second photoelectric conversion module through a counter and a pulse generation circuit, can finely process and analyze the signal generated by the photosensitive module, accurately counts the pulse by using the counter, and further improves the accuracy and reliability of speed measurement in combination with the signal conversion function of the pulse generation circuit, and is convenient for integration and collaborative work with other control modules.

[0062] The belt conveyor with speed sensing in the mine of the embodiment can be implemented in hardware, software, firmware or any combination thereof. The various features described can be implemented together in an integrated logic device or separately as discrete but interoperable logic devices or other hardware components. In some cases, the various features of the electronic circuitry can be implemented as one or more integrated circuit devices, such as integrated circuit chips or chip sets.

[0063] The terms "first", "second", "third", "fourth" and the like in the description and in the claims of the utility model and the above drawings (if any) are used to distinguish similar objects, and do not have to be used to describe a particular order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0064] The above description of the disclosed embodiments enables those skilled in the art to implement or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A mine belt conveyor with speed sensing, comprising: The conveyor belt and the control box are arranged in a slope roadway, the bottom of the conveyor belt is provided with a conveyor roller which operates synchronously with the conveyor belt; one end of the conveyor belt is provided with a driving roller, and the driving roller is connected with a driving motor; the driving motor is connected with a frequency converter; the frequency converter is connected with a PLC controller; characterized in that a plurality of light beam emitters are arranged at intervals on the side of the conveyor belt; A first photoelectric conversion module is arranged on the upper part of the conveyor belt and matches the light beam emitters; A pulse generating circuit and a single-chip microcomputer are arranged in the control box; The pulse generating circuit is in communication connection with the first photoelectric conversion module, receives an electric signal and converts the electric signal into a pulse signal; The single-chip microcomputer is connected with the pulse generating circuit and obtains the running speed of the conveyor belt based on the number of pulse signals; The PLC controller is in communication connection with the single-chip microcomputer, obtains the running speed of the conveyor belt and controls the running speed of the conveyor belt through the frequency converter.

2. The mine belt conveyor with speed sensing according to claim 1, characterized in that, A rotating shaft is arranged in the middle of the conveyor roller, and a photoelectric encoder is mounted on the rotating shaft; a plurality of gratings are arranged on the photoelectric encoder, a light source is arranged at one end of the photoelectric encoder, and a light baffle is arranged at the other end of the photoelectric encoder; a light transmission hole matched with the gratings is arranged on the light baffle, and a photosensitive module is arranged near one side of the light transmission hole; The photosensitive module is connected with a second photoelectric conversion module; The single-chip microcomputer is in communication connection with the second photoelectric conversion module through a counter and the pulse generating circuit.

3. The mine belt conveyor with speed sensing according to claim 1, characterized in that, An amplifying circuit and a shaping circuit are further arranged in the control box; The single-chip microcomputer is in communication connection with the pulse generating circuit through the amplifying circuit and the pulse shaping circuit.

4. A mine belt conveyor with speed sensing according to claim 3, characterized in that, The pulse generating circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a transistor Q1 and an operational amplifier U1; The first end of the capacitor C1 is connected with the input end of the pulse generating circuit, the second end of the capacitor C1 is connected with the first end of the resistor R1 and the positive input end of the operational amplifier U1 respectively, and the negative input end of the operational amplifier U1 is connected with the first end of the resistor R2; The second end of the resistor R1, the second end of the resistor R2 and the emitter of the transistor Q1 are grounded respectively; The output end of the operational amplifier U1 is connected with the base of the transistor Q1 through the resistor R3, the collector of the transistor Q1 is connected with the output end of the pulse generating circuit and the second end of the resistor R4 respectively, and the first end of the resistor R4 is connected with the power supply.

5. The mine belt conveyor with speed sensing according to claim 1, characterized in that, A counter is further arranged in the control box; The single-chip microcomputer is in communication connection with the counter and records the number of pulses generated by the pulse generating circuit.

6. A mine belt conveyor with speed sensing according to claim 5, characterized in that, The counter adopts a 74LS160 counter or a 74LS161 counter; The PLC controller adopts a Siemens S7-1200 controller or a Mitsubishi FX series PLC controller.

7. A mine belt conveyor with speed sensing according to claim 4, characterized in that, The operational amplifier U1 adopts an OPA2356 operational amplifier; The frequency converter adopts a Siemens MM440 frequency converter or a Mitsubishi FR-E700 frequency converter.

8. A mine belt conveyor with speed sensing according to claim 1 or 2, characterized in that, The single-chip microcomputer adopts an STM32 single-chip microcomputer or an ARM microprocessor; The light beam emitter adopts an infrared light-emitting diode or a laser diode. The first photoelectric conversion module adopts a photoresistor or an avalanche photodiode.

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