CN114560258B

CN114560258B - Belt conveyor protection device

Info

Publication number: CN114560258B
Application number: CN202210242613.0A
Authority: CN
Inventors: 徐冲; 高路; 杨磊; 郑鑫; 侯磊; 周敏; 夏国华; 刘按巡; 张建; 郝奇
Original assignee: Huainan Mining Group Co Ltd
Current assignee: Huainan Mining Group Co Ltd
Priority date: 2022-03-11
Filing date: 2022-03-11
Publication date: 2022-12-02
Anticipated expiration: 2042-03-11
Also published as: CN114560258A

Abstract

The invention discloses a belt conveyor protection device, which comprises an emergency stop input circuit, an emergency stop control circuit, a sensor input circuit, a signal transfer circuit, a main control circuit, an alarm circuit, a fault protection circuit and a power supply circuit, wherein the power supply circuit supplies power to the whole protection device; the invention has the advantages that: when the emergency stop position is detected, corresponding protection measures are timely carried out on the belt conveyor, equipment is prevented from being damaged, and personal safety is protected.

Description

Belt conveyor protection device

Technical Field

The invention relates to the field of belt conveyors for coal mines, in particular to a belt conveyor protection device.

Background

The belt conveyor is also called as a rubber belt conveyor, and is widely applied to various industries such as household appliances, electronics, electrical appliances, machinery, tobacco, injection molding, post and telecommunications, printing, food and the like, and the assembly, detection, debugging, packaging, transportation and the like of objects. The belt conveyor can be divided into a heavy belt conveyor such as a mining belt conveyor and a light belt conveyor such as those used in the industries of electronic plastics, light food industry, chemical engineering, medicine and the like according to the conveying capacity of the belt conveyor.

The belt conveyor has the advantages of strong conveying capacity, long conveying distance, simple structure, easy maintenance and convenient implementation of programmed control and automatic operation. The continuous or intermittent motion of the conveyer belt is used to convey 100KG below article, powder or granular article, and the conveyer belt has high speed, smooth running, low noise and capacity of conveying up and down slope.

After the existing 80 belt conveyor in a mine is in emergency stop action, the pulled emergency stop position cannot be quickly judged, so that quick reset cannot be realized, a belt cannot be opened, and the production is influenced. Chinese patent No. CN106115219B discloses a monitoring system of a belt conveyor with fault location function, which is to solve the problem of difficulty in locating faults such as deviation, coal piling, slipping, tearing, over-temperature, smoke, etc. in the existing monitoring system of a belt conveyor, a modularized system structure is adopted, and modules are combined into a system, a dual-bus network structure is adopted in the system, an RS485 bus automatically allocates addresses to devices along the line, and a CAN bus transmits the positions and fault types of the faults in real time after the belt conveyor has faults such as deviation, coal piling, slipping, tearing, over-temperature, smoke, etc. The system can monitor the running state of the rubber belt conveyor in real time, timely find faults in the running process of the rubber belt conveyor, accurately position the faults, send out voice alarm, output different protection signals according to fault types, realize the safety protection of the rubber belt conveyor, and improve the running safety, stability and continuity of the rubber belt conveyor. However, the monitoring system of the rubber belt conveyor only broadcasts faults, corresponding protection measures are not carried out on the belt conveyor in time, and equipment is easy to damage and personal safety is endangered.

Disclosure of Invention

The invention aims to solve the technical problems that the belt conveyor protection device in the prior art only reports faults, corresponding protection measures are not carried out on the belt conveyor in time, equipment is easy to damage, and personal safety is endangered.

The invention solves the technical problems through the following technical means: a belt conveyor protection device comprises an emergency stop input circuit, an emergency stop control circuit, a sensor input circuit, a signal transfer circuit, a main control circuit, an alarm circuit, a fault protection circuit and a power circuit, wherein the power circuit supplies power to the whole protection device; the fault protection circuit comprises a chip U16, a resistor R26, a capacitor C27, a capacitor C12, an indicator light LED1, a resistor R10, a belt conveyor shutdown protection unit and an overtemperature protection unit, wherein a twelfth pin of the chip U16 is connected with one end of the resistor R26 and one end of the capacitor C27, the other end of the capacitor C27 is grounded, a third pin, a thirty-third pin of the chip U16 and the other end of the resistor R26 are correspondingly connected with an IO port of the main control circuit one by one, a second pin, an eighth pin and one end of the capacitor C12 of the chip U16 are all connected with a +5V power supply, and the other end of the capacitor C12 is grounded; the seventeenth pin of the chip U16 is connected with one end of a resistor R10, the other end of the resistor R10 is connected with the cathode of an indicator light LED1, the anode of the indicator light LED1 is connected with a +5V power supply, the fourth pin and the fifth pin of the chip U16 are connected with a belt conveyor shutdown protection unit, and the sixth pin of the chip U16 is connected with an overtemperature protection unit.

The invention is provided with an emergency stop input circuit and a sensor input circuit, and transmits emergency stop signals and sensor signals to a main control circuit, the main control circuit reports the emergency stop position through an alarm circuit, so that field operators can reset rapidly according to the emergency stop position, a belt is normally opened, and production is prevented from being influenced, in addition, a fault protection circuit is arranged, the main control circuit sends fault signals to a chip U16, a fourth pin and a fifth pin of the chip U16 are connected with a belt machine halt protection unit, the action of the belt machine protection unit is triggered, the belt machine halt is locked, a sixth pin of the chip U16 is connected with an over-temperature protection unit, and an electromagnetic valve of an over-temperature water spraying device acts to timely perform corresponding protection measures on the belt machine, so that equipment damage is avoided, and personal safety is protected.

Further, scram input circuit has the multichannel, and wherein scram input circuit of the same way includes resistance 1RN1, electric capacity 1C1 and opto-coupler 1U1, electric capacity 1C 1's one end, opto-coupler 1U 1's second pin and scram signal connection, resistance 1RN 1's one end and +12V power connection, resistance 1RN 1's the other end and opto-coupler 1U 1's first pin are connected, opto-coupler 1U 1's third pin ground connection, opto-coupler 1U 1's fourth pin and scram control circuit connection.

Furthermore, the emergency stop control circuit comprises a chip 1U17 and a chip 1U18, wherein an eleventh pin to a fourteenth pin and a third pin to a sixth pin of the chip 1U17, as well as the eleventh pin to the fourteenth pin and the third pin to the sixth pin of the chip 1U18 are respectively connected with a fourth pin of an optical coupler in the emergency stop input circuit, a tenth pin of the chip 1U17 is connected with a ninth pin of the chip 1U18, a first pin of the chip 1U17 is connected with a first pin of the chip 1U18, a second pin of the chip 1U17 is connected with a second pin of the chip 1U18, the first pin of the chip 1U17 is connected with a +3.3V power supply through a resistor, and the second pin of the chip 1U17 is connected with a +3.3V power supply through another resistor.

Furthermore, the sensor input circuit has multiple paths and respectively inputs fault signals corresponding to sensors such as start-stop, coal piling, deviation, sudden stop, tearing, dotting, temperature, speed and smoke, wherein one path of the sensor input circuit comprises a resistor R1, a capacitor C1 and an optical coupler U1, one end of the capacitor C1, a second pin of the optical coupler U1 and a sensor signal are connected, one end of the resistor R1 is connected with a +12V power supply, the other end of the resistor R1 is connected with a first pin of the optical coupler U1, a third pin of the optical coupler U1 is grounded, and a fourth pin of the optical coupler U1 is connected with a sudden stop control circuit; the fourth pins of the optical couplers of the sensor input circuits corresponding to coal piling, deviation, sudden stop, tearing, dotting, temperature, speed and smoke are respectively connected with the signal transfer circuit, and the fourth pins of the optical couplers of the sensor input circuits corresponding to start and stop are connected with the tenth pin of the chip 1U 18.

Furthermore, the signal transfer circuit comprises a chip U12, a tenth pin of the chip U12 is connected with a seventh pin of the chip 1U17, the eleventh pin to the fourteenth pin and the third pin to the sixth pin of the chip U12 are connected with a fourth pin of an optical coupler of the sensor input circuit corresponding to coal piling, deviation, sudden stop, tearing, dotting, temperature, speed and smoke in a one-to-one correspondence manner, and the second pin, the first pin and the ninth pin of the chip 1U17, the chip 1U18 and the chip U12 are connected with the main control circuit.

Furthermore, the main control circuit comprises a main control chip M3, wherein pins P30, P31 and P32 of the main control chip M3 are respectively connected with the second pin, the first pin and the ninth pin of the chip 1U17 in a one-to-one correspondence manner, connected with the second pin, the first pin and the ninth pin of the chip 1U18 in a one-to-one correspondence manner, and further connected with the second pin, the first pin and the ninth pin of the chip U12 in a one-to-one correspondence manner; the pin P36, the pin P37 and the pin P20 of the main control chip M3 are connected with an alarm circuit.

Furthermore, the alarm circuit comprises a chip U17, a voice chip U21, a capacitor C26, a capacitor C28, a capacitor C31, a resistor R19, a resistor R20, a resistor R30, a capacitor C23, a capacitor C48, a slide rheostat W2, a capacitor C46, a capacitor C16, a resistor R24, a capacitor C39, a capacitor C40, a capacitor C30, a capacitor C41, a capacitor C42, a chip U20, a resistor R27, a resistor R28, a resistor R25, a resistor R32, a resistor R29, a capacitor C21, a capacitor C22 and a horn RL1, wherein an eleventh pin, a twelfth pin and a fourteenth pin of the chip U17 are connected with a P36 pin, a P37 pin and a P20 pin of the main control chip M3 in a one-to-one correspondence; the fifteenth pin, the first pin to the seventh pin of the chip U17 are connected with the nineteenth pin to the twenty-fourth pin, the sixteenth pin and the fifteenth pin of the voice chip U21 in a one-to-one correspondence; a twenty-first pin of the voice chip U21 is connected with a P02 pin of the main control chip M3; a ninth pin of the voice chip U21 is connected with one end of a resistor R19, a sixth pin, a seventh pin and an eighth pin of the voice chip U21, the other end of the resistor R19, one end of a capacitor C28, the anode of a capacitor C31 and one end of a resistor R20 are connected, the other end of the capacitor C28 and the cathode of the capacitor C31 are grounded, and the other end of the resistor R20 is connected with a +3.3V power supply; a tenth pin of the voice chip U21, one end of the resistor R30 and one end of the capacitor C23 are connected, and the other end of the resistor R30 and an eleventh pin of the voice chip U21 are connected and grounded; the other end of the capacitor C23, one end of the capacitor C48 and one end of the sliding rheostat W2 are connected, the other end of the capacitor C48, the other end of the sliding rheostat W2 and one end of the capacitor C46 are connected and grounded, the other end of the capacitor C46, the control end of the sliding rheostat W2 and one end of the capacitor C16 are connected, the other end of the capacitor C16 is connected with a first pin of the chip U20, a second pin of the chip U20 is connected with a positive electrode of the capacitor C39, one end of the resistor R24, a negative electrode of the capacitor C39, the resistor R27 and one end of the resistor R25 are connected, the other end of the resistor R24 is grounded, a positive electrode of the capacitor C40 is connected with a fifth pin of the chip U20, a negative electrode of the capacitor C40 is grounded, a negative electrode of the capacitor C41 is connected with a fourth pin of the chip U20, a positive electrode of the capacitor C41 is connected with the other end of the resistor R25 and one end of the resistor R32, a positive electrode of the capacitor C42 is connected with a third pin of the chip U20, and a negative electrode of the capacitor C42 is connected with a sixth pin of the chip U20 and grounded; one end of the capacitor C30 and a ninth pin of the chip U20 are connected with the power supply 12V1, and the other end of the capacitor C30 is grounded; the tenth pin of the chip U20, the other end of the resistor R27, one end of the resistor R28, and one end of the horn RL1 are connected, the other end of the resistor R32, the eighth pin of the chip U20, one end of the resistor R29, and the other end of the horn RL1 are connected, the other end of the resistor R28 is connected with the other end of the resistor R29 through the capacitor C21 and the capacitor C22, and a connection line between the capacitor C21 and the capacitor C22 is grounded.

Furthermore, the belt conveyor protection device further comprises a storage circuit and a display circuit, and the display circuit and the storage circuit are both connected with the main control chip M3.

Furthermore, the third pin, the thirty-third pin of the chip U16 and the other end of the resistor R26 are connected with the P23 pin, the P21 pin and the P22 pin of the main control chip M3 in a one-to-one correspondence, the belt conveyor shutdown protection unit comprises a relay J1 and a relay J2, two triodes are connected in parallel at two ends of a coil of the relay J1, anodes of the two triodes in parallel are connected with the fourth pin of the chip U16, cathodes of the two triodes in parallel are connected with a +12V2 power supply, two triodes are also connected in parallel at two ends of the coil of the relay J2, anodes of the two triodes in parallel connected with the relay J2 are connected with the fifth pin of the chip U16, cathodes of the two triodes in parallel connected with the relay J2 are connected with cathodes of the two triodes in parallel connected with the relay J1, the overtemperature protection unit comprises a relay J3, two triodes are also connected in parallel at two ends of the coil of the relay J3, anodes of the two triodes in parallel are connected with the sixth pin of the chip U16, cathodes of the two triodes in parallel connected with cathodes of the normally open relay J2, and a contact point of the relay J3 is connected on a relay loop, and a contact point of the overtemperature water circulating device of the belt conveyor.

Further, the power circuit comprises a fuse F1, a high-frequency switching power supply, a rectifying circuit, a filter circuit, a voltage stabilizing circuit and an overcurrent and overvoltage protection circuit which are sequentially connected, one end of the fuse F1 is connected with the positive end of a 127V power supply, the other end of the fuse F1 is connected with the positive input end of the high-frequency switching power supply, the negative end of the 127V power supply is connected with the negative input end of the high-frequency switching power supply, the rectifying circuit, the filter circuit, the voltage stabilizing circuit and the overcurrent and overvoltage protection circuit respectively comprise two paths, one path of the rectifying circuit comprises a diode T2, a capacitor C15, a resistor R16 and a capacitor C17, the filter circuit comprises an inductor L2 and a capacitor 1C2, the voltage stabilizing circuit comprises a voltage stabilizing chip U11, a resistor 1R1, a resistor 1R2 and a capacitor 1C3, the overcurrent and overvoltage protection circuit comprises a resistor 1R3, a resistor 1R5, a resistor 1R4, a resistor 1R6, a resistor 1R7, an overcurrent and overvoltage protection device MK1, an overcurrent and an overvoltage protection device 1C4, the positive ends of a group of output ports of the high-frequency switching power supply are respectively connected with the anode of a diode T2 and one end of a capacitor C15, the other end of the capacitor C15 is connected with one end of a resistor R16, the other end of the resistor R16, the cathode of the diode T2, the anode of a capacitor C17 and one end of an inductor L2, the other end of the inductor L2, one end of a capacitor 1C2 and a third pin of a voltage stabilizing chip U11 are connected, a first pin of the voltage stabilizing chip U11, one end of the resistor 1R1 and one end of the resistor 1R2 are connected, a second pin of the voltage stabilizing chip U11, the other end of the resistor 1R1, the anode of the capacitor 1C3, a first pin of an overcurrent and overvoltage protector 1MK2, a first pin of an overcurrent and overvoltage protector 1MK1 and a first pin to a third pin are connected, the negative end of a group of the output ports of the high-frequency switching power supply, the cathode of the capacitor C17, the other end of the capacitor 1C2, the other end of the resistor 1R2, the negative end of the output ports of the high-frequency switching power supply, and the negative end of the capacitor C2, the negative electrode of the capacitor 1C3, one end of the resistor 1R5, one end of the resistor 1R4, one end of the resistor 1R6 and one end of the resistor 1R7 are connected; the other end of the resistor 1R3 is connected with an eighth pin of the overcurrent and overvoltage protector 1MK1, the other end of the resistor 1R5 is connected with a ninth pin of the overcurrent and overvoltage protector 1MK1, the other end of the resistor 1R4 is connected with an eighth pin of the overcurrent and overvoltage protector 1MK2, the other end of the resistor 1R6 is connected with a ninth pin of the overcurrent and overvoltage protector 1MK2, a sixth pin of the overcurrent and overvoltage protector 1MK1, a sixth pin of the overcurrent and overvoltage protector 1MK2 and one end of the resistor 1R6, a seventh pin of the overcurrent and overvoltage protector 1MK1, a seventh pin, a second pin and a third pin of the overcurrent and overvoltage protector 1MK2 are all connected with the other end of the resistor 1R 7; the fourth pin and the fifth pin of the overcurrent and overvoltage protector 1MK1 and one end of the capacitor 1C4 are connected and used as the positive end of a group of +12V power supplies, and the other end of the capacitor 1C4, the fourth pin and the fifth pin of the overcurrent and overvoltage protector 1MK2 are connected and grounded and used as the negative end of the group of +12V power supplies.

The invention has the advantages that:

(1) The invention is provided with an emergency stop input circuit and a sensor input circuit, and transmits emergency stop signals and sensor signals to a main control circuit, the main control circuit reports the emergency stop position through an alarm circuit, so that field operators can reset rapidly according to the emergency stop position, a belt is normally opened, and production is prevented from being influenced, in addition, a fault protection circuit is arranged, the main control circuit sends fault signals to a chip U16, a fourth pin and a fifth pin of the chip U16 are connected with a belt machine halt protection unit, the action of the belt machine protection unit is triggered, the belt machine halt is locked, a sixth pin of the chip U16 is connected with an over-temperature protection unit, and an electromagnetic valve of an over-temperature water spraying device acts to timely perform corresponding protection measures on the belt machine, so that equipment damage is avoided, and personal safety is protected.

(2) The invention sets an emergency stop control circuit, a plurality of emergency stop signals are respectively connected with each pin of a chip 1U17 and a chip 1U18 in the emergency stop control circuit, one emergency stop signal corresponds to one pin, then the signal is transmitted to a signal transfer circuit, the signal transfer circuit is also connected with fault signals corresponding to sensors of start stop, coal piling, deviation, emergency stop, tearing, dotting, temperature, speed and smoke, so that the emergency stop signal transmitted by the emergency stop control circuit and the fault signals transmitted by the sensors are connected with a main control circuit by the signal transfer circuit, when the signal acts, the active circuit can obtain the emergency stop position or the position of the sensor according to the signal source, and the result is reported through a voice alarm circuit or the result is displayed by a display circuit.

(3) The belt conveyor emergency stop device is provided with the voice alarm circuit, an emergency stop position signal and a fault signal are sent to the voice chip U21 through the chip U17, the voice chip U21 amplifies the signal through the chip U20 and then transmits the amplified signal through the loudspeaker, and therefore voice alarm is achieved, field workers are reminded in time, and efficient protection is achieved on the belt conveyor.

Drawings

Fig. 1 is a general circuit block diagram of a belt conveyor protection device according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of an emergency stop input circuit and an emergency stop control circuit in a belt conveyor protection device according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a sensor input circuit and a signal relay circuit in a belt conveyor protection device according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a main control circuit in the belt conveyor protection device according to the embodiment of the present invention;

FIG. 5 is a schematic diagram of an alarm circuit in a belt conveyor protection device according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a portion of a fault protection circuit in a belt conveyor protection apparatus according to an embodiment of the present invention;

FIG. 7 is another schematic diagram of a portion of a fault protection circuit in a belt conveyor protection apparatus according to an embodiment of the present invention;

fig. 8 is a schematic diagram of a power circuit in a belt conveyor protection device according to an embodiment of the invention.

Detailed Description

In order to make the objects, 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 with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, a belt conveyor protection device comprises an emergency stop input circuit 1, an emergency stop control circuit 2, a sensor input circuit 3, a signal transfer circuit 4, a main control circuit 5, an alarm circuit 6 and a power circuit 7, wherein the power circuit 7 supplies power to the whole protection device, the emergency stop input circuit 1 is connected with the emergency stop control circuit 2, the emergency stop control circuit 2 and the sensor input circuit 3 are both connected with the signal transfer circuit 4, the signal transfer circuit 4 is connected with the main control circuit 5, and the main control circuit 5 is connected with the alarm circuit 6.

As shown in fig. 2, scram input circuit 1 has the multichannel, and wherein scram input circuit 1 of one way includes resistance 1RN1, electric capacity 1C1 and opto-coupler 1U1, electric capacity 1C 1's one end, opto-coupler 1U 1's second pin and scram signal connection, resistance 1RN 1's one end and +12V power are connected, and resistance 1RN 1's the other end and opto-coupler 1U 1's first pin are connected, and opto-coupler 1U 1's third pin ground connection, opto-coupler 1U 1's fourth pin and scram control circuit 2 are connected. Although multi-path scram is connected, only one path of scram action exists in the running process of the belt conveyor, and the multi-path scram action cannot be simultaneously carried out.

With reference to fig. 2, the emergency stop control circuit 2 includes a chip 1U17 and a chip 1U18, where an eleventh pin to a fourteenth pin, a third pin to a sixth pin of the chip 1U17, an eleventh pin to a fourteenth pin, and a third pin to a sixth pin of the chip 1U18 are respectively connected to a fourth pin of an optical coupler in the emergency stop input circuit 1, a tenth pin of the chip 1U17 is connected to a ninth pin of the chip 1U18, a first pin of the chip 1U17 is connected to a first pin of the chip 1U18, a second pin of the chip 1U17 is connected to a second pin of the chip 1U18, the first pin of the chip 1U17 is connected to a +3.3V power supply through a resistor, and the second pin of the chip 1U17 is connected to a +3.3V power supply through another resistor.

As shown in fig. 3, the sensor input circuit 3 has multiple paths, and respectively inputs fault signals corresponding to sensors such as start-stop, coal piling, deviation, emergency stop, tearing, dotting, temperature, speed and smoke, wherein one path of the sensor input circuit 3 comprises a resistor R1, a capacitor C1 and an optical coupler U1, one end of the capacitor C1, a second pin of the optical coupler U1 and a sensor signal are connected, one end of the resistor R1 is connected with a +12V power supply, the other end of the resistor R1 is connected with a first pin of the optical coupler U1, a third pin of the optical coupler U1 is grounded, and a fourth pin of the optical coupler U1 is connected with the emergency stop control circuit 2; the fourth pins of the optical couplers of the sensor input circuit 3 corresponding to coal piling, deviation, sudden stop, tearing, dotting, temperature, speed and smoke are respectively connected with the signal transfer circuit 4, and the fourth pin of the optical coupler of the sensor input circuit 3 corresponding to start-stop is connected with the tenth pin of the chip 1U 18. The sensor input circuit 3 is similar to the scram input circuit 1, and each sensor signal is input to the signal relay circuit 4 through one sensor input circuit 3, so that the signal relay circuit 4 can receive the scram signal input by the scram input circuit 1 and the sensor signal input by the sensor input circuit 3.

Continuing to refer to fig. 3, the signal transfer circuit 4 includes a chip U12, a tenth pin of the chip U12 is connected to a seventh pin of the chip 1U17, fourth pins of the optical couplers of the sensor input circuit 3, which correspond to the coal pile, the deviation, the sudden stop, the tearing, the dotting, the temperature, the speed, and the smoke in one-to-one correspondence with the eleventh pin to the fourteenth pin and the third pin to the sixth pin of the chip U12, are connected to the chip 1U17, the chip 1U18, and the second pin, the first pin, and the ninth pin of the chip U12 are all connected to the main control circuit 5.

As shown in fig. 4, the main control circuit 5 includes a main control chip M3, and pins P30, P31, and P32 of the main control chip M3 are respectively connected to the second pin, the first pin, and the ninth pin of the chip 1U17 in a one-to-one correspondence manner, connected to the second pin, the first pin, and the ninth pin of the chip 1U18 in a one-to-one correspondence manner, and further connected to the second pin, the first pin, and the ninth pin of the chip U12 in a one-to-one correspondence manner; the pin P36, the pin P37 and the pin P20 of the main control chip M3 are connected with the alarm circuit 6. The main control chip M3 may be an existing single chip with an IO control port.

As shown in fig. 5, the alarm circuit 6 includes a chip U17, a voice chip U21, a capacitor C26, a capacitor C28, a capacitor C31, a resistor R19, a resistor R20, a resistor R30, a capacitor C23, a capacitor C48, a sliding rheostat W2, a capacitor C46, a capacitor C16, a resistor R24, a capacitor C39, a capacitor C40, a capacitor C30, a capacitor C41, a capacitor C42, a chip U20, a resistor R27, a resistor R28, a resistor R25, a resistor R32, a resistor R29, a capacitor C21, a capacitor C22, and a horn RL1, where an eleventh pin, a twelfth pin, and a fourteenth pin of the chip U17 are connected to a P36 pin, a P37 pin, and a P20 pin of the main control chip M3 in a one-to-one correspondence; the fifteenth pin, the first pin to the seventh pin of the chip U17 are connected with the nineteenth pin to the twenty-fourth pin, the sixteenth pin and the fifteenth pin of the voice chip U21 in a one-to-one correspondence; the twenty-first pin of the voice chip U21 is connected with the P02 pin of the main control chip M3; a ninth pin of the voice chip U21 is connected with one end of a resistor R19, a sixth pin, a seventh pin and an eighth pin of the voice chip U21, the other end of the resistor R19, one end of a capacitor C28, the anode of a capacitor C31 and one end of a resistor R20 are connected, the other end of the capacitor C28 and the cathode of the capacitor C31 are grounded, and the other end of the resistor R20 is connected with a +3.3V power supply; a tenth pin of the voice chip U21, one end of the resistor R30 and one end of the capacitor C23 are connected, and the other end of the resistor R30 and an eleventh pin of the voice chip U21 are connected and grounded; the other end of the capacitor C23, one end of the capacitor C48, one end of the sliding rheostat W2 are connected, the other end of the capacitor C48, the other end of the sliding rheostat W2 and one end of the capacitor C46 are connected and grounded, the other end of the capacitor C46, the control end of the sliding rheostat W2 and one end of the capacitor C16 are connected, the other end of the capacitor C16 is connected with the first pin of the chip U20, the second pin of the chip U20 is connected with the positive electrode of the capacitor C39, one end of the resistor R24, the negative electrode of the capacitor C39, the resistor R27 and one end of the resistor R25 are connected, the other end of the resistor R24 is grounded, the positive electrode of the capacitor C40 is connected with the fifth pin of the chip U20, the negative electrode of the capacitor C40 is grounded, the negative electrode of the capacitor C41 is connected with the fourth pin of the chip U20, the positive electrode of the capacitor C41 is connected with the other end of the resistor R25 and one end of the resistor R32, the positive electrode of the capacitor C42 is connected with the third pin of the chip U20, and the negative electrode of the capacitor C42 is connected with the sixth pin of the chip U20 and grounded; one end of the capacitor C30 and a ninth pin of the chip U20 are connected with the power supply 12V1, and the other end of the capacitor C30 is grounded; the tenth pin of the chip U20, the other end of the resistor R27, one end of the resistor R28, and one end of the horn RL1 are connected, the other end of the resistor R32, the eighth pin of the chip U20, one end of the resistor R29, and the other end of the horn RL1 are connected, the other end of the resistor R28 is connected with the other end of the resistor R29 through the capacitor C21 and the capacitor C22, and a connection line between the capacitor C21 and the capacitor C22 is grounded. Alarm circuit 6 mainly is through chip U17 received signal to give voice chip U21 with signal transmission, voice chip U21 again gives chip U20 with signal transmission and enlargies, then reports through loudspeaker RL 1.

The belt conveyor protection device provided by the invention further comprises a storage circuit and a display circuit, wherein the display circuit and the storage circuit are both connected with the IO output port of the main control chip M3. The storage circuit mainly stores information such as an emergency stop signal and a sensor signal received by the main control circuit 5 through a memory chip, and the memory chip in this embodiment adopts AT24C02A. The display circuit adopts an LED display screen.

As shown in fig. 6 and 7, the belt conveyor shutdown protection circuit further includes a fault protection circuit 8, where the fault protection circuit 8 includes a chip U16, a resistor R26, a capacitor C27, a capacitor C12, an indicator LED1, a resistor R10, a belt conveyor shutdown protection unit, and an over-temperature protection unit, a twelfth pin of the chip U16 is connected to one end of the resistor R26 and one end of the capacitor C27, the other end of the capacitor C27 is grounded, a third pin, a thirty-third pin of the chip U16, and the other end of the resistor R26 are connected to a pin P23, a pin P21, and a pin P22 of the main control chip M3 in a one-to-one correspondence, a second pin, an eighth pin, and one end of the capacitor C12 of the chip U16 are all connected to a +5V power supply, and the other end of the capacitor C12 is grounded; a seventeenth pin of the chip U16 is connected with one end of a resistor R10, the other end of the resistor R10 is connected with a cathode of an indicator light LED1, an anode of the indicator light LED1 is connected with a +5V power supply, a fourth pin and a fifth pin of the chip U16 are connected with a belt conveyor shutdown protection unit, and a sixth pin of the chip U16 is connected with an overtemperature protection unit; the belt feeder is shut down protection unit and is included relay J1 and relay J2, two triodes of parallel connection are connected at relay J1's coil both ends, the positive pole of two triodes of parallel connection connects the fourth pin of chip U16, the negative pole of two triodes of parallel connection connects +12V2 power, two triodes of parallel connection are also connected in parallel at relay J2's coil both ends, the positive pole of two triodes of parallel connection of relay J2 connects the fifth pin of chip U16, the negative pole of two triodes of parallel connection of relay J2 connects the negative pole of two triodes of parallel connection of relay J1, the overtemperature protection unit includes relay J3, two triodes of parallel connection are also connected in parallel at relay J3's coil both ends, the positive pole of two triodes of parallel connection connects the sixth pin of chip U16, the negative pole of two triodes of parallel connection of relay J3 connects the negative pole of two triodes of parallel connection of relay J2, relay J1 and relay J2's normally open contact connect on the start-stop loop of belt feeder, relay J3 normally open contact connects on the power supply loop of overtemperature sprinkler. The main control circuit 5 sends a fault signal to the chip U16, a fourth pin and a fifth pin of the chip U16 are connected with the relay J1 and the relay J2 in the belt conveyor shutdown protection unit, the fault signal enables coils of the relays J1 and J2 to be powered off, normally open nodes are released, a magnetic switch self-protection contact is opened, and the belt conveyor is shut down and locked, so that fault protection is achieved. And a sixth pin of the chip U16 is connected with a relay J3 in the over-temperature protection unit, and an over-temperature watering fault signal controls the contact of the relay J3 to be sucked or released and controls the action of an over-temperature watering device (an electromagnetic valve).

As shown in fig. 8, the power circuit 7 includes a fuse F1, a high frequency switching power supply, a rectifying circuit, a filter circuit, a voltage stabilizing circuit, and an over-current over-voltage protection circuit, which are connected in sequence, one end of the fuse F1 is connected to a positive end of a 127V power supply, the other end of the fuse F1 is connected to a positive input end of the high frequency switching power supply, a negative input end of the 127V power supply is connected to a negative input end of the high frequency switching power supply, the rectifying circuit, the filter circuit, the voltage stabilizing circuit, and the over-current over-voltage protection circuit include two circuits, wherein one rectifying circuit includes a diode T2, a capacitor C15, a resistor R16, and a capacitor C17, the filter circuit includes an inductor L2 and a capacitor 1C2, the voltage stabilizing circuit includes a voltage stabilizing chip U11, a resistor 1R1, a resistor 1R2, and a capacitor 1C3, the over-voltage protection circuit includes a resistor 1R3, a resistor 1R5, a resistor 1R4, a resistor 1R6, a resistor 1R7, an over-current protector 1MK1, an over-voltage protector 1MK2, and a capacitor 1C4, the positive ends of a group of output ports of the high-frequency switching power supply are respectively connected with the anode of a diode T2 and one end of a capacitor C15, the other end of the capacitor C15 is connected with one end of a resistor R16, the other end of the resistor R16, the cathode of the diode T2, the anode of a capacitor C17 and one end of an inductor L2, the other end of the inductor L2, one end of a capacitor 1C2 and a third pin of a voltage stabilizing chip U11 are connected, a first pin of the voltage stabilizing chip U11, one end of the resistor 1R1 and one end of the resistor 1R2 are connected, a second pin of the voltage stabilizing chip U11, the other end of the resistor 1R1, the anode of the capacitor 1C3, a first pin of an overcurrent and overvoltage protector 1MK2, a first pin of an overcurrent and overvoltage protector 1MK1 and a first pin to a third pin are connected, the negative end of a group of the output ports of the high-frequency switching power supply, the cathode of the capacitor C17, the other end of the capacitor 1C2, the other end of the resistor 1R2, the negative end of the output ports of the high-frequency switching power supply, and the negative end of the capacitor C2, the negative electrode of the capacitor 1C3, one end of the resistor 1R5, one end of the resistor 1R4, one end of the resistor 1R6 and one end of the resistor 1R7 are connected; the other end of the resistor 1R3 is connected with an eighth pin of the overcurrent and overvoltage protector 1MK1, the other end of the resistor 1R5 is connected with a ninth pin of the overcurrent and overvoltage protector 1MK1, the other end of the resistor 1R4 is connected with an eighth pin of the overcurrent and overvoltage protector 1MK2, the other end of the resistor 1R6 is connected with a ninth pin of the overcurrent and overvoltage protector 1MK2, a sixth pin of the overcurrent and overvoltage protector 1MK1, a sixth pin of the overcurrent and overvoltage protector 1MK2 and one end of the resistor 1R6 are connected, and a seventh pin of the overcurrent and overvoltage protector 1MK1, a seventh pin of the overcurrent and overvoltage protector 1MK2, a second pin and a third pin are connected with the other end of the resistor 1R 7; the fourth pin and the fifth pin of the overcurrent and overvoltage protector 1MK1 and one end of the capacitor 1C4 are connected and used as the positive end of a group of +12V power supplies, and the other end of the capacitor 1C4, the fourth pin and the fifth pin of the overcurrent and overvoltage protector 1MK2 are connected and grounded and used as the negative end of the group of +12V power supplies. Two output ports of the high-frequency switching power supply are respectively connected with a rectifying circuit, a filter circuit, a voltage stabilizing circuit and an overcurrent and overvoltage protection circuit in sequence, and finally two 12V voltage sources are output. The high-frequency switching power supply, the voltage stabilizing chip U11 and the overcurrent and overvoltage protector are of the prior art, and the voltage stabilizing chip U11 can be LM2940CT-12. The high-frequency switching power supply can adopt S-100W-24V.

The model numbers of the chip 1U17, the chip 1U18 and the chip U12 are 74HC165, the model numbers of the chip U16 and the chip U17 are TPIC6C595, the model number of the voice chip U21 is ap89341, and the model number of the chip U20 is LM4766.

The working process of the invention is as follows: a plurality of emergency stop signals are respectively and independently connected with pins of a chip 1U17 and a chip 1U18 in an emergency stop control circuit 2, one emergency stop signal corresponds to one pin, then the signal is transmitted to a signal transfer circuit 4, the signal transfer circuit 4 is also connected with fault signals corresponding to sensors of start-stop, coal piling, deviation, emergency stop, tearing, dotting, temperature, speed and smoke, so that the emergency stop signal transmitted by the emergency stop control circuit 2 and the fault signals transmitted by the sensors are all connected with a main control circuit 5 by the signal transfer circuit 4, when the signal acts, the active circuit can obtain the emergency stop position or the position of the sensor according to the signal source, and the result is reported through a voice alarm circuit 6 or the result is displayed by a display circuit.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A belt conveyor protection device is characterized by comprising an emergency stop input circuit, an emergency stop control circuit, a sensor input circuit, a signal transfer circuit, a master control circuit, an alarm circuit, a fault protection circuit and a power circuit, wherein the power circuit supplies power to the whole protection device; the fault protection circuit comprises a chip U16, a resistor R26, a capacitor C27, a capacitor C12, an indicator light LED1, a resistor R10, a belt conveyor shutdown protection unit and an overtemperature protection unit, wherein a twelfth pin of the chip U16 is connected with one end of the resistor R26 and one end of the capacitor C27, the other end of the capacitor C27 is grounded, a third pin, a thirty-third pin of the chip U16 and the other end of the resistor R26 are correspondingly connected with an IO port of the main control circuit one by one, a second pin, an eighth pin and one end of the capacitor C12 of the chip U16 are all connected with a +5V power supply, and the other end of the capacitor C12 is grounded; a seventeenth pin of the chip U16 is connected with one end of a resistor R10, the other end of the resistor R10 is connected with a cathode of an indicator light LED1, an anode of the indicator light LED1 is connected with a +5V power supply, a fourth pin and a fifth pin of the chip U16 are connected with a belt conveyor shutdown protection unit, and a sixth pin of the chip U16 is connected with an over-temperature protection unit;

the emergency stop input circuit comprises a plurality of paths, wherein one path of emergency stop input circuit comprises a resistor 1RN1, a capacitor 1C1 and an optocoupler 1U1, one end of the capacitor 1C1, a second pin of the optocoupler 1U1 and an emergency stop signal are connected, one end of the resistor 1RN1 is connected with a +12V power supply, the other end of the resistor 1RN1 is connected with a first pin of the optocoupler 1U1, a third pin of the optocoupler 1U1 is grounded, and a fourth pin of the optocoupler 1U1 is connected with an emergency stop control circuit;

the scram control circuit comprises a chip 1U17 and a chip 1U18, wherein an eleventh pin to a fourteenth pin and a third pin to a sixth pin of the chip 1U17, an eleventh pin to a fourteenth pin and a third pin to a sixth pin of the chip 1U18 are respectively connected with a fourth pin of an optical coupler in a scram input circuit, a tenth pin of the chip 1U17 is connected with a ninth pin of the chip 1U18, a first pin of the chip 1U17 is connected with a first pin of the chip 1U18, a second pin of the chip 1U17 is connected with a second pin of the chip 1U18, the first pin of the chip 1U17 is connected with a +3.3V power supply through a resistor, and the second pin of the chip 1U17 is connected with the +3.3V power supply through another resistor;

the sensor input circuit is provided with multiple paths and respectively inputs fault signals corresponding to sensors such as start-stop, coal piling, deviation, emergency stop, tearing, dotting, temperature, speed and smoke, wherein one path of sensor input circuit comprises a resistor R1, a capacitor C1 and an optocoupler U1, one end of the capacitor C1, a second pin of the optocoupler U1 and a sensor signal are connected, one end of the resistor R1 is connected with a +12V power supply, the other end of the resistor R1 is connected with a first pin of the optocoupler U1, a third pin of the optocoupler U1 is grounded, and a fourth pin of the optocoupler U1 is connected with an emergency stop control circuit; a fourth pin of an optical coupler of the sensor input circuit corresponding to coal piling, deviation, sudden stop, tearing, dotting, temperature, speed and smoke is respectively connected with the signal transfer circuit, and a fourth pin of the optical coupler of the sensor input circuit corresponding to start-stop is connected with a tenth pin of the chip 1U 18;

the signal transfer circuit comprises a chip U12, a tenth pin of the chip U12 is connected with a seventh pin of the chip 1U17, eleventh to fourteenth pins and third to sixth pins of the chip U12 are connected with fourth pins of an optical coupler of the sensor input circuit corresponding to coal piling, deviation, sudden stop, tearing, dotting, temperature, speed and smoke in a one-to-one correspondence manner, and the chip 1U17, the chip 1U18 and a second pin, a first pin and a ninth pin of the chip U12 are connected with the main control circuit;

the main control circuit comprises a main control chip M3, wherein a pin P30, a pin P31 and a pin P32 of the main control chip M3 are respectively connected with a second pin, a first pin and a ninth pin of the chip 1U17 in a one-to-one correspondence manner, connected with a second pin, a first pin and a ninth pin of the chip 1U18 in a one-to-one correspondence manner, and further connected with a second pin, a first pin and a ninth pin of the chip U12 in a one-to-one correspondence manner; a P36 pin, a P37 pin and a P20 pin of the main control chip M3 are connected with an alarm circuit;

the alarm circuit comprises a chip U17, a voice chip U21, a capacitor C26, a capacitor C28, a capacitor C31, a resistor R19, a resistor R20, a resistor R30, a capacitor C23, a capacitor C48, a slide rheostat W2, a capacitor C46, a capacitor C16, a resistor R24, a capacitor C39, a capacitor C40, a capacitor C30, a capacitor C41, a capacitor C42, a chip U20, a resistor R27, a resistor R28, a resistor R25, a resistor R32, a resistor R29, a capacitor C21, a capacitor C22 and a loudspeaker RL1, wherein an eleventh pin, a twelfth pin and a fourteenth pin of the chip U17 are connected with a P36 pin, a P37 pin and a P20 pin of a main control chip M3 in a one-to-one correspondence manner; the fifteenth pin, the first pin to the seventh pin of the chip U17 are connected with the nineteenth pin to the twenty-fourth pin, the sixteenth pin and the fifteenth pin of the voice chip U21 in a one-to-one correspondence; the twenty-first pin of the voice chip U21 is connected with the P02 pin of the main control chip M3; a ninth pin of the voice chip U21 is connected with one end of a resistor R19, a sixth pin, a seventh pin and an eighth pin of the voice chip U21, the other end of the resistor R19, one end of a capacitor C28, the anode of a capacitor C31 and one end of a resistor R20 are connected, the other end of the capacitor C28 and the cathode of the capacitor C31 are grounded, and the other end of the resistor R20 is connected with a +3.3V power supply; the tenth pin of the voice chip U21, one end of the resistor R30 and one end of the capacitor C23 are connected, and the other end of the resistor R30 and the eleventh pin of the voice chip U21 are connected and grounded; the other end of the capacitor C23, one end of the capacitor C48, one end of the sliding rheostat W2 are connected, the other end of the capacitor C48, the other end of the sliding rheostat W2 and one end of the capacitor C46 are connected and grounded, the other end of the capacitor C46, the control end of the sliding rheostat W2 and one end of the capacitor C16 are connected, the other end of the capacitor C16 is connected with the first pin of the chip U20, the second pin of the chip U20 is connected with the positive electrode of the capacitor C39, one end of the resistor R24, the negative electrode of the capacitor C39, the resistor R27 and one end of the resistor R25 are connected, the other end of the resistor R24 is grounded, the positive electrode of the capacitor C40 is connected with the fifth pin of the chip U20, the negative electrode of the capacitor C40 is grounded, the negative electrode of the capacitor C41 is connected with the fourth pin of the chip U20, the positive electrode of the capacitor C41 is connected with the other end of the resistor R25 and one end of the resistor R32, the positive electrode of the capacitor C42 is connected with the third pin of the chip U20, and the negative electrode of the capacitor C42 is connected with the sixth pin of the chip U20 and grounded; one end of the capacitor C30 and a ninth pin of the chip U20 are connected with the power supply 12V1, and the other end of the capacitor C30 is grounded; the tenth pin of the chip U20, the other end of the resistor R27, one end of the resistor R28, and one end of the horn RL1 are connected, the other end of the resistor R32, the eighth pin of the chip U20, one end of the resistor R29, and the other end of the horn RL1 are connected, the other end of the resistor R28 is connected with the other end of the resistor R29 through the capacitor C21 and the capacitor C22, and a connection line between the capacitor C21 and the capacitor C22 is grounded.

2. The belt conveyor protection device of claim 1, further comprising a storage circuit and a display circuit, wherein the display circuit and the storage circuit are both connected to the main control chip M3.

3. The belt conveyor protection device according to claim 2, wherein the third pin and the thirty-third pin of the chip U16 and the other end of the resistor R26 are connected with the P23 pin, the P21 pin and the P22 pin of the main control chip M3 in a one-to-one correspondence, the belt conveyor shutdown protection unit comprises a relay J1 and a relay J2, two triodes are connected in parallel at two ends of a coil of the relay J1, an anode of the two triodes connected in parallel is connected with the fourth pin of the chip U16, a cathode of the two triodes connected in parallel is connected with a +12V2 power supply, two triodes are also connected in parallel at two ends of the coil of the relay J2, an anode of the two triodes connected in parallel with the relay J2 is connected with the fifth pin of the chip U16, a cathode of the two triodes connected in parallel with the relay J2 is connected with a cathode of the two triodes connected in parallel with the relay J1, the overtemperature protection unit comprises a relay J3, two triodes are also connected in parallel at two ends of the coil of the relay J3, an anode of the two triodes connected in parallel is connected with a sixth pin of the chip U16, a normally open contact of the relay J3 is connected with a relay J2, and a relay J3 is connected with a relay circuit, and a relay contact point of the relay J3.

4. The belt conveyor protection device according to claim 1, wherein the power supply circuit comprises a fuse F1, a high-frequency switching power supply, a rectifying circuit, a filter circuit, a voltage stabilizing circuit and an overcurrent and overvoltage protection circuit which are connected in sequence, one end of the fuse F1 is connected with a 127V power supply positive terminal, the other end of the fuse F1 is connected with an input positive terminal of the high-frequency switching power supply, a 127V power supply negative terminal is connected with an input negative terminal of the high-frequency switching power supply, the rectifying circuit, the filter circuit, the voltage stabilizing circuit and the overcurrent and overvoltage protection circuit respectively comprise two circuits, one rectifying circuit comprises a diode T2, a capacitor C15, a resistor R16 and a capacitor C17, the filter circuit comprises an inductor L2 and a capacitor 1C2, the voltage stabilizing circuit comprises a voltage stabilizing chip U11, a resistor 1R1, a resistor 1R2 and a capacitor 1C3, the overcurrent and overvoltage protection circuit comprises a resistor 1R3, a resistor 1R5, a resistor 1R4, a resistor 1R6, a resistor 1R7, an overcurrent and overvoltage protector 1MK1, an overcurrent and overvoltage protector 1MK2 and a capacitor 1C4, the positive ends of a group of output ports of the high-frequency switching power supply are respectively connected with the anode of a diode T2 and one end of a capacitor C15, the other end of the capacitor C15 is connected with one end of a resistor R16, the other end of the resistor R16, the cathode of the diode T2, the anode of a capacitor C17 and one end of an inductor L2, the other end of the inductor L2, one end of the capacitor 1C2 and a third pin of a voltage stabilizing chip U11, a first pin of the voltage stabilizing chip U11, one end of the resistor 1R1 and one end of the resistor 1R2 are connected, a second pin of the voltage stabilizing chip U11, the other end of the resistor 1R1, the anode of the capacitor 1C3 and a first pin of the overvoltage protector 1MK2, a first pin of the overcurrent and a first pin of the overvoltage protector 1, a first pin of the overvoltage protector 1MK1 are connected, and a negative end of a group of the output ports of the high-frequency switching power supply are connected, the negative electrode of the capacitor C17, the other end of the capacitor 1C2, the other end of the resistor 1R2, the negative electrode of the capacitor 1C3, one end of the resistor 1R5, one end of the resistor 1R4, one end of the resistor 1R6 and one end of the resistor 1R7 are connected; the other end of the resistor 1R3 is connected with an eighth pin of the overcurrent and overvoltage protector 1MK1, the other end of the resistor 1R5 is connected with a ninth pin of the overcurrent and overvoltage protector 1MK1, the other end of the resistor 1R4 is connected with an eighth pin of the overcurrent and overvoltage protector 1MK2, the other end of the resistor 1R6 is connected with a ninth pin of the overcurrent and overvoltage protector 1MK2, a sixth pin of the overcurrent and overvoltage protector 1MK1, a sixth pin of the overcurrent and overvoltage protector 1MK2 and one end of the resistor 1R6 are connected, and a seventh pin of the overcurrent and overvoltage protector 1MK1, a seventh pin of the overcurrent and overvoltage protector 1MK2, a second pin and a third pin are connected with the other end of the resistor 1R 7; the fourth pin and the fifth pin of the overcurrent and overvoltage protector 1MK1 and one end of the capacitor 1C4 are connected and used as the positive end of a group of +12V power supplies, and the other end of the capacitor 1C4, the fourth pin and the fifth pin of the overcurrent and overvoltage protector 1MK2 are connected and grounded and used as the negative end of the group of +12V power supplies.