A control method for vibrating ore-drawing machine

Abstract

The invention discloses a control method for a vibrating ore-feeding machine, comprising the following steps: a switch is turned left or right, a contactless controller is controlled to be closed in the forward direction or the reverse direction, and a corresponding vibration motor is rotated forward or reversely; a motor comprehensive protector detects the three-phase current of the vibration motor: when the imbalance of the three-phase current reaches a set value, the leakage current reaches a set value, and the voltage of the vibration motor is too high or too low, a fault is reported and a protection action is taken to stop the vibration motor; when the motor works continuously for too long, or the load is too large and the temperature rises and reaches the set protection value, an intelligent temperature controller is protected and controls the vibration motor to stop; after the motor comprehensive protector and the temperature controller are fault protected, the vibration motor is stopped and an audible and visual alarm is given through a corresponding indicator light and a buzzer. The application is easy to use, improves the service life of the vibration motor, and is easy to troubleshoot the fault location.

Description

Technical Field

[0001] The invention relates to the field of mineral powder transportation, and in particular to a control method for a vibrating ore-feeding machine. Background Art

[0002] The working environment of the vibrating ore-feeding machine is harsh, and it starts very frequently with a large starting current. Once the motor burns out, it is very difficult to replace, dismantle and install it, which consumes a lot of manpower. The motor of the vibrating ore-feeding machine is generally small in power, only a few or a dozen kilowatts. In many occasions, the protection and control system are ignored. Traditionally, it is controlled by an AC contactor. Under frequent starts, the contacts are easily singed and heated under the impact of large starting current, and the contact is poor, resulting in frequent burning due to phase loss, operational overvoltage, etc. of the vibration motor. The protection is generally a simple thermal relay protection. The thermal relay is unreliable and has a high failure rate. It cannot fully protect the vibration motor from overcurrent, phase loss, overvoltage, overtemperature, etc., and it cannot perform temperature protection. The essential reason for the motor burning is the high temperature, so it is very necessary to increase temperature protection. Summary of the invention

[0003] The main purpose of the present invention is to provide a vibration ore-drawing machine control method, which can effectively solve the problem of poor protection effect of the vibration motor in the prior art described in the background technology.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A vibration ore-dropping machine control method comprises the following steps

[0006] The conversion switch turns left or right, controls the contactless controller to close forward or reverse, and the corresponding vibration motor rotates forward or reverse;

[0007] The motor integrated protector detects the three-phase current of the vibration motor. If any phase current is higher than the set value and reaches the set time: the three-phase current imbalance reaches the set value, the leakage current reaches the set value, or the vibration motor voltage is too high or too low, it will report a fault and take protective action to stop the vibration motor from working to prevent the vibration motor from burning out.

[0008] When the motor works continuously for too long, or the load is too large and the temperature rises and reaches the set protection value, the intelligent temperature controller will control the vibration motor to stop to prevent the vibration motor from overheating and burning;

[0009] After the motor integrated protector and temperature controller fault protection are activated, the vibration motor stops and an audible and visual alarm is issued through the corresponding indicator light and buzzer to prompt the operator.

[0010] Preferably, the three-phase outgoing cables of the contactless controller pass through three holes of the current transformer of the motor integrated protector respectively to sense the main circuit current.

[0011] Preferably, the temperature sensor is a magnetic patch type PT100 temperature sensor, which is adsorbed on the vibration motor housing or screwed on the vibration motor housing.

[0012] Preferably, the conversion switch is a three-way conversion switch, which controls the start and stop of the contactless controller, right turn for forward rotation, left turn for reverse rotation, and stop in the middle.

[0013] Preferably, there are two indicator lights, which are respectively fixed on the distribution box door.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The contactless controller of the present application is a power electronic device. There is no spark when closing and opening the switch, no limit on the service life of the contacts, and it is easy to install. It has comprehensive protection, including overload, overcurrent, three-phase imbalance, leakage, overvoltage, low voltage, and temperature protection, which greatly reduces the probability of motor burning. It has low cost, less wiring, and simple installation. It has fault indication and inquiry, and sound and light alarm functions, so that operators and maintenance personnel can easily judge the fault and deal with it quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The schematic diagram is a control method of a vibrating ore-dropping machine according to the present invention. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0018] like Figure 1As shown, a protection and control method for a vibrating ore-dropping machine includes a temperature sensor, a temperature controller, a motor integrated protector, a contactless controller, an indicator light, a buzzer, and a conversion switch. The contactless controller is installed in the main circuit of the motor to replace the ordinary AC contactor, and has forward and reverse control. The contactless controller is a new type of contactless switching device developed by combining modern microelectronics technology and power electronics technology. It has the advantages of moisture-proof, corrosion-resistant, shock-proof, explosion-proof, fast switching speed, no noise, long life, no sparks during switching, etc., which greatly reduces the failure rate; the motor integrated protector is intelligent, and the main circuit current detection system and the secondary protection circuit are integrated into one. The three-phase outlet cables of the contactless controller pass through the three holes of the current transformer of the motor integrated protector respectively to sense the main circuit current. The motor integrated protector has a digital display function, simple parameter setting, 485 communication function, and complete protection functions including: overload, overcurrent, leakage, three-phase imbalance, overvoltage and other protections, and also has fault Query function; the temperature sensor is a magnetic patch PT100 temperature sensor, which can be directly adsorbed on the outside of the vibration motor, or it can be tapped on the motor casing and fixed with screws; the temperature controller is an intelligent temperature controller, which receives the temperature signal from the temperature sensor, has a digital display function, is easy to set parameters, and has a 485 communication function. When the motor temperature exceeds the set protection value, the vibration motor protection is immediately shut down to prevent the vibration motor from burning due to excessive temperature; the conversion switch is a three-way conversion switch, which controls the start and stop of the contactless controller, turns right forward, turns left reverse, and stops in the middle; the rated voltage of the indicator light is 36 volts AC, and two are installed on the distribution box door to indicate overcurrent or overtemperature faults respectively; the buzzer is used to remind the operator when a fault occurs, just like the indicator light.

[0019] Specific steps:

[0020] The conversion switch turns left or right, controls the contactless controller to close forward or reverse, and the corresponding vibration motor rotates forward or reverse;

[0021] The motor integrated protector detects the three-phase current of the vibration motor. If any phase current is higher than the set value and reaches the set time: the three-phase current imbalance reaches the set value, the leakage current reaches the set value, or the vibration motor voltage is too high or too low, it will report a fault and take protective action to stop the vibration motor from working to prevent the vibration motor from burning out.

[0022] When the motor works continuously for too long, or the load is too large and the temperature rises and reaches the set protection value, the intelligent temperature controller will control the vibration motor to stop to prevent the vibration motor from overheating and burning;

[0023] After the motor integrated protector and temperature controller fault protection are activated, the vibration motor stops and the corresponding indicator light and buzzer sound an alarm to remind the operator

[0024] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A vibration ore-drawing machine control method, characterized in that: The following steps are included The conversion switch turns left or right, controls the contactless controller to close forward or reverse, and the corresponding vibration motor rotates forward or reverse; The motor integrated protector detects the three-phase current of the vibration motor. If any phase current is higher than the set value and reaches the set time: the three-phase current imbalance reaches the set value, the leakage current reaches the set value, or the vibration motor voltage is too high or too low, it will report a fault and take protective action to stop the vibration motor from working to prevent the vibration motor from burning out. When the motor works continuously for too long, or the load is too large and the temperature rises and reaches the set protection value, the intelligent temperature controller will control the vibration motor to stop to prevent the vibration motor from overheating and burning; After the motor integrated protector and temperature controller fault protection are activated, the vibration motor stops and an audible and visual alarm is issued through the corresponding indicator light and buzzer to prompt the operator.

2. A vibration ore-drawing machine control method according to claim 1, characterized in that: The three-phase outgoing cables of the contactless controller pass through three holes of the current transformer of the motor integrated protector respectively to sense the main circuit current.

3. A vibration ore-drawing machine control method according to claim 2, characterized in that: The temperature sensor is a magnetic patch type PT100 temperature sensor, which is adsorbed on the vibration motor housing or fixed on the vibration motor housing by screws.

4. A vibration ore-drawing machine control method according to claim 3, characterized in that: The switch is a three-way switch that controls the start and stop of the contactless controller, right turn forward, left turn reverse, and stop in the middle.

5. The cooling method of the vibration ore-drawing machine control method according to claim 4, characterized in that: There are two indicator lights, which are fixed on the doors of the distribution box respectively.

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