Wireless remote control traction electrical control system of conveying belt head stripping machine

Abstract

The utility model discloses a wireless remote control traction electrical control system of a conveying belt head stripping machine, which comprises an isolating switch, the isolating switch is connected with a main loop and a control loop in parallel, the main loop comprises an alternating current motor, and the alternating current motor is connected with a forward alternating current contactor and a reverse alternating current contactor in parallel. The forward alternating current contactor and the reverse alternating current contactor are electrically connected with the isolating switch in parallel; the control loop comprises a control transformer, the control transformer is connected with a switching power supply and an intrinsic safety power supply in parallel, the switching power supply is connected with a forward rotation intermediate relay and a reverse rotation intermediate relay in parallel, the switching power supply is connected with a remote control receiver in series, and the remote control receiver is connected with a wireless remote control transmitter in series. The intrinsically safe wireless remote controller is adopted, so that the wireless remote controller is small in size, simple in structure, portable, convenient to operate, long in wireless remote control distance, large in operation range and not limited by regions and occasions.

Description

Technical Field

[0001] The utility model relates to the field of electrical technology, in particular to a wireless remote control traction electrical control system for a conveyor belt stripping machine. Background Art

[0002] The coal output in coal mines is large, and most underground belt conveyors use strong steel wire core conveyor belts. Therefore, the vulcanization efficiency and quality of conveyor belts directly affect the safe and efficient production of coal mines. With the extensive use of steel wire core conveyor belts, the stripping of steel belts has always been one of the main factors affecting the quality and time of rubber belt bonding. Steel wire rope tapes are widely used in long-distance and large-volume transmission systems due to their high strength, low elongation, and good troughing properties. The vulcanization bonding quality of steel wire rope belts has become an important guarantee for the safe operation of the system. At present, the bonding process of industrial high-strength conveyor belt products with steel wire rope as the skeleton is mainly hot vulcanization bonding. The bonding method is to expose the steel wire rope in the interface area and then The steel wire ropes are arranged in parallel and crossed, filled with unvulcanized rubber, and bonded by on-site vulcanization. The length of the interface is graded and overlapped according to the strength of the conveyor belt. The current stripping method is to use a multi-purpose knife to cut out the steel wires in the interface area one by one. The labor intensity is extremely high and time-consuming, usually accounting for half of the total vulcanization process time. In addition, since the quality of manual stripping is difficult to control, a large amount of hand sweat and grease remain on the surface of the steel wire rope, seriously affecting the quality of bonding. There is also a mechanical stripping method, which uses a semi-circular blade for single-wire and single-side stripping, but the operation and traction of the stripping machine are cumbersome, and the stripping machine traction electrical control system uses a wired remote control, which is not convenient for carrying and operation, and there are certain safety hazards.

[0003] At present, the traction electrical control system used by the mechanical stripping head stripping machine is a remote control with a wired cable dragging method. In terms of transportation, safety of use and convenient operation, the following problems are generally encountered:

[0004] (1) Since the application scenario is underground in a coal mine, the wired remote control needs to be explosion-proof. The explosion-proof remote control is large in size, complex in structure, and has poor portability and operability.

[0005] (2) The remote control distance is affected by the length of the cable and is short. The operating range can only be near the traction motor. A dedicated person is required to perform the traction operation, which increases the number of staff. Utility Model Content

[0006] The purpose of the utility model is to provide a wireless remote control traction electrical control system for a conveyor belt stripping machine, so as to solve the problems in the above-mentioned background technology that the explosion-proof remote control is large in size, complex in structure, poor in portability and operability, and the control distance is affected by the cable length.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a wireless remote control traction electrical control system for a conveyor belt stripping machine, comprising an isolating switch, the isolating switch is connected in parallel to a main circuit and a control circuit, the main circuit comprises an AC motor, the AC motor is connected in parallel to a forward AC contactor and a reverse AC contactor, the forward AC contactor and the reverse AC contactor are electrically connected in parallel to the isolating switch; the control circuit comprises a control transformer, the control transformer is connected in parallel to a switching power supply and an intrinsically safe power supply, the switching power supply is connected in parallel to a forward intermediate relay and a reverse intermediate relay, the intrinsically safe power supply is connected in series to a remote control receiver, and the remote control receiver in this case is connected in series to a wireless remote control transmitter.

[0008] Preferably, a first normally closed auxiliary contact is connected in series between the forward intermediate relay and the remote control receiver, and a second normally closed auxiliary contact is connected in series between the reverse intermediate relay and the remote control receiver.

[0009] Preferably, the remote control receiver includes an antenna, and the antenna is connected in series with an external antenna via a connecting piece.

[0010] Preferably, a fuse is provided between the control transformer and the switching power supply and the intrinsically safe power supply.

[0011] Preferably, a first protection circuit and a second protection circuit are connected in parallel between the control transformer, the switching power supply and the intrinsically safe power supply.

[0012] Preferably, the first protection circuit includes a first AC relay, the first AC relay is connected in series with a third normally closed auxiliary contact, the third normally closed auxiliary contact is connected in series with a first switch, and the second protection circuit includes a second AC relay, the second AC relay is connected in series with a fourth normally closed auxiliary contact, and the fourth normally closed auxiliary contact is connected in series with the second switch.

[0013] Preferably, the AC motor is a three-phase cage-type asynchronous motor.

[0014] Preferably, the remote control receiver is connected in parallel to the first communication interface and the second communication interface.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The main circuit and the control circuit are connected in parallel through the isolating switch, and the remote control receiver is connected with the remote control receiver to solve the problems of large size and complex structure of explosion-proof remote control. The intrinsically safe wireless remote control is small in size, simple in structure, portable and easy to operate. The wireless remote control has a long distance and a large operating range, and is not restricted by geographical occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the electrical principle block diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the electrical principle of the utility model;

[0019] In the figure: 1. main circuit; 11. isolating switch; 12. AC motor; 13. forward AC contactor; 14. reverse AC contactor; 2. control circuit; 21. control transformer; 22. intrinsically safe power supply; 23. switching power supply; 24. remote control receiver; 241. antenna; 242. connecting piece; 243. external antenna; 244. first communication interface; 245. second communication interface; 25. fuse; 26. forward intermediate relay; 27. reverse intermediate relay; 28. first AC relay; 29. ​​second AC relay. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Embodiment 1:

[0022] See also Figure 1-2 As shown, the wireless remote control traction electrical control system of the conveyor belt stripping machine includes an isolating switch 11, which is connected in parallel to the main circuit 1 and the control circuit 2. The main circuit 1 includes an AC motor 12, which is connected in parallel to the forward AC contactor 13 and the reverse AC contactor 14, and the forward AC contactor 13 and the reverse AC contactor 14 are electrically connected in parallel to the isolating switch 11; the control circuit 2 includes a control transformer 21, which is connected in parallel to a switch power supply 23 and an intrinsically safe power supply 22, and the switch power supply 23 is connected in parallel to a forward intermediate relay 26 and a reverse intermediate relay 27, and the intrinsically safe power supply 22 is connected in series to a remote control receiver 24. In this case, the remote control receiver 24 is connected to a wireless remote control transmitter. A first normally closed auxiliary contact is connected in series between the forward intermediate relay 26 and the remote control receiver 24, and a second normally closed auxiliary contact is connected in series between the reverse intermediate relay 27 and the remote control receiver 24.

[0023] The remote control receiver 24 includes an antenna 241 , and the antenna 241 is serially connected to an external antenna 243 via a connecting piece 242 .

[0024] The AC motor 12 is a three-phase cage asynchronous motor, which has the advantages of simple structure, reliable operation, light weight and easy use.

[0025] Embodiment 2:

[0026] A fuse 25 is provided between the control transformer 21 and the switching power supply 23 and the intrinsically safe power supply 22 .

[0027] A first protection circuit and a second protection circuit are connected in parallel between the control transformer 21, the switching power supply 23 and the intrinsically safe power supply 22. The first protection circuit includes a first AC relay 28, the first AC relay 28 is connected in series with a third normally closed auxiliary contact, the third normally closed auxiliary contact is connected in series with the first switch, and the second protection circuit includes a second AC relay 29, the second AC relay 29 is connected in series with a fourth normally closed auxiliary contact, and the fourth normally closed auxiliary contact is connected in series with the second switch.

[0028] AC relays can achieve remote control, transferring the switching operation in the circuit from the on-site to the remote control platform, improving the convenience and flexibility of electrical control.

[0029] The fuse 25 and the first protection circuit and the second protection circuit can better protect the circuit, prevent abnormalities in the circuit, and avoid damage to the circuit and equipment.

[0030] Working principle:

[0031] The wireless remote controller cooperates with the remote control receiver 24 through the external antenna 243, and uses the wireless frequency method to transmit information, which is used to control the transmission of information, and receives the data information transmitted by the remote control receiver 24, and displays the transmitted data on the LCD screen. The first communication interface 244 and the second communication interface 245 are connected to the RS485 communication method to transmit various protection states, detected current values ​​and voltage values ​​and other information to the remote control receiver 24.

[0032] The intrinsically safe remote control receiver 24 is used for outputting control signals of the control coils of the forward intermediate relay 26 and the reverse intermediate relay 27, and is connected to the communication interface of the AC contactor via RS485 communication. The intrinsically safe remote control receiver 24 reads the data information transmitted by the AC contactor as a master station, and transmits the data information to the wireless remote control transmitter via wireless frequency.

[0033] The forward AC contactor 13 and the reverse AC contactor 14 are used to control the retraction and release of the AC motor 12 when the stripping machine strips the rubber on the wire rope core. At the same time, the forward AC contactor 13 and the reverse AC contactor 14 have overload protection, short circuit instantaneous protection, short circuit short delay protection, starting protection, phase loss or three-phase imbalance protection, overvoltage protection, undervoltage and loss of voltage protection, and can detect the three-phase current value and the three-phase voltage value in real time.

[0034] The control transformer 21 is used to convert the input power voltage into an AC220V control voltage for use in the control loop 2 .

[0035] The switching power supply 23 is used to convert the AC220V alternating current output by the control transformer 21 into DC24V direct current through rectification and voltage stabilization, and control the forward intermediate relay 26 and the reverse intermediate relay 27.

[0036] The forward intermediate relay 26 and the reverse intermediate relay 27 are used to control the working state of the AC contactor coil through the output signal of the remote controller receiver 24 .

[0037] The intrinsically safe power supply 22 is used to control the AC220V alternating current output by the transformer 21 to be converted into an intrinsically safe DC 24V direct current through rectification, voltage stabilization and isolation, and used as a power supply to supply power to the remote control receiver.

[0038] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0039] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. Wireless remote control traction electrical control system for conveyor belt stripping machine, characterized by: The invention comprises an isolating switch (11), wherein the isolating switch (11) is connected in parallel to a main circuit (1) and a control circuit (2), wherein the main circuit (1) comprises an AC motor (12), wherein the AC motor (12) is connected in parallel to a forward AC contactor (13) and a reverse AC contactor (14), wherein the forward AC contactor (13) and the reverse AC contactor (14) are electrically connected in parallel to the isolating switch (11); wherein the control circuit (2) comprises a control transformer (21), wherein the control transformer (21) is connected in parallel to a switching power supply (23) and an intrinsically safe power supply (22), wherein the switching power supply (23) is connected in parallel to a forward intermediate relay (26) and a reverse intermediate relay (27), wherein the intrinsically safe power supply (22) is connected in series to a remote control receiver (24), wherein the remote control receiver (24) is connected to a wireless remote control transmitter.

2. The wireless remote control traction electrical control system for the conveyor belt stripping machine according to claim 1 is characterized in that: A first normally closed auxiliary contact is connected in series between the forward intermediate relay (26) and the remote control receiver (24), and a second normally closed auxiliary contact is connected in series between the reverse intermediate relay (27) and the remote control receiver (24).

3. The wireless remote control traction electrical control system for the conveyor belt stripping machine according to claim 1 is characterized in that: The remote control receiver (24) includes an antenna (241), and the antenna (241) is connected in series to an external antenna (243) via a connecting piece (242).

4. The wireless remote control traction electrical control system for the conveyor belt stripping machine according to claim 1 is characterized in that: A fuse (25) is provided between the control transformer (21), the switch power supply (23) and the intrinsically safe power supply (22).

5. The wireless remote control traction electrical control system for the conveyor belt stripping machine according to claim 1 is characterized in that: A first protection circuit and a second protection circuit are connected in parallel between the control transformer (21), the switching power supply (23) and the intrinsically safe power supply (22).

6. The wireless remote control traction electrical control system for the conveyor belt stripping machine according to claim 5 is characterized in that: The first protection circuit comprises a first AC relay (28), the first AC relay (28) is connected in series with a third normally closed auxiliary contact, and the third normally closed auxiliary contact is connected in series with a first switch; the second protection circuit comprises a second AC relay (29), the second AC relay (29) is connected in series with a fourth normally closed auxiliary contact, and the fourth normally closed auxiliary contact is connected in series with the second switch.

7. The wireless remote control traction electrical control system for the conveyor belt stripping machine according to any one of claims 1 to 6, characterized in that: The AC motor (12) is a three-phase cage-type asynchronous motor.

8. The wireless remote control traction electrical control system for the conveyor belt stripping machine according to claim 1 is characterized in that: The remote control receiver (24) is connected in parallel to the first communication interface (244) and the second communication interface (245).

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