CN202331106U - Master controller of mine explosion-proof combined switch - Google Patents

Abstract

The utility model relates to a master controller of a mine explosion-proof combined switch. The master controller comprises a PLC (Programmable Logic Controller), an optical coupling isolator connected with the PLC, an isolation simplifier, an analog quantity input device and a power source, wherein the PLC is connected with a switching value in the combined switch through the optical coupling isolator, a contactor in the combined switch is controlled by the PLC through the isolation amplifier, and the PLC is connected with current and voltage sensors in the combined switch through the analog quantity input device. The master controller disclosed by the utility model is provided with various drivers for each circuit, has the functions of protection of overvoltage, undervoltage, short circuit, overload, lack of phase, three-phase imbalance and the like, and meets the requirements of rapid underground fault treatment and maintenance.

Description

Mine explosion-suppression combined switch primary controller

Technical field

The utility model relates to the switch of appliance field, relates to a kind of core devices that is used to control the many Electric Machine Control of set of equipments such as colliery mining face under mine digging, transportation and protects the mine flameproof and intrinsic safety type combined switch control loop of usefulness.

Background technology

The combined switch that use at present in the colliery; The core parts that the protection control system adopts mainly contain single-chip microcomputer, resolution element; Reaction velocity is slow, and control function is difficult to accomplish diversification, backward in technique, the poor reliability of control system; A little less than communication interface, monitoring function, the fault inquiry function, can not adapt to the demand of modernized mine production, safety.

The utility model content

The purpose of the utility model is to improve to above-mentioned shortcoming of the prior art, and a kind of general mine explosion-suppression combined switch primary controller is provided.

The technical scheme of the utility model is: a kind of mine explosion-suppression combined switch primary controller, and described primary controller comprises the PLC controller, the optical coupling isolator, isolated amplifier, analog quantity input unit and the power supply that join with the PLC controller; The PLC controller joins through the switching value in optical coupling isolator and the combined switch, through the contactor in the isolated amplifier control switchgroup, joins through the electric current in analog quantity input unit and the combined switch, voltage sensor.

Preferably: described optical coupling isolator receives four road pilot signals, emergent stop signal, switching value input/output signal, methane transducer signal and loop emergent stop signal in the combined switch.

Preferably: described analog input device receives outside four road three-phase current signals, low pressure electric leakage signal, detection of electrical leakage signal and outside associated sensor signal.

The beneficial effect of the utility model is: the utility model primary controller has the various drivings to each loop; Various functions such as kinds of protect such as overvoltage, under-voltage, short circuit, overload, phase shortage, three-phase imbalance satisfy the requirement of down-hole fast processing fault and maintenance.This product of primary controller can realize that through liquid crystal display and intrinsic safety keyboard each loop both can be independent of other loops, and other loops of may command again also can be controlled by other loops or can be provided with as subsequent use etc.Can increase control mode according to customer requirements, and can realize the independent assortment of above-mentioned control function as required; Can realize the man-machine conversation function, have fault memory and fault inquiry function, each primary controller is applicable to the combination of 4 loops, and many primary controllers are capable of being combined to be used for more multiloop combined switch, adapts to the current development of colliery automated system from now on that reaches.

Description of drawings

Fig. 1 is the theory diagram of the utility model

Embodiment

Embodiment below in conjunction with description of drawings the utility model:

Mine explosion-suppression combined switch primary controller; Has a PLC controller 1; Be used for handling four road three-phase current signals, low pressure electric leakage signal, major loop detection of electrical leakage signal and outside associated sensor signal; Through the signal Processing of algorithm, move protections such as realizing short circuit, overload, phase shortage and three-phase imbalance through contactor in each chamber of isolated amplifier 3 control switchgroups to three-phase current; An optical coupling isolator 2; Outside four road three-phase current signals, low pressure electric leakage signal, detection of electrical leakage signal and outside associated sensor signal link to each other with the PLC controller through three analog quantity input units 5,6,7, and analog quantity input unit 5,6,7 converts outside various electric currents or voltage signal the 1 acceptable data layout communication with it of to PLC controller; Four road pilot signals, emergent stop signal, switching value input/output signal, methane transducer signal and loop emergent stop signal link to each other with PLC controller 1 through optical coupling isolator 2 in the combined switch, and optical coupling isolator 2 plays external signal and gets into controller signals and keep apart the effect to protect controller and to convert outside various switching value signal levels to the level that PLC controller 1 can discern; The execution command that PLC primary controller 1 sends is amplified to the 220VAC voltage of control loop contactor needs with the action of control major loop through isolated amplifier 3, play the effect of controller and external signal insulation blocking primary controller simultaneously; Primary controller is equipped with power supply 4, and two-way 12VDC intrinsic safety electric source one tunnel is that another road of 420mA is that the 290mA electric current is to satisfy on-the-spot needs; Primary controller cooperates that display screen and intrinsic safety keyboard can be accomplished the starting of motor, stop, principal and subordinate's sequential control, low speed control, High-speed Control, guide are controlled; Realization is to motor overload, short circuit, phase shortage, overtemperature, earth leakage protection, but the state of visual indicator equipment operation, and can carry out parameter setting.

During work; Combined switch is given primary controller power supply and startup command, and at first system voltage signal, low pressure detection of electrical leakage signal are sent into the PLC controller through optical coupling isolator, and controller carries out data processing to judge whether the combined switch supply voltage has overvoltage, under-voltage fault; If system voltage is undesired; Primary controller realizes that each loop of locking combined switch all can not start, if system voltage is normal, is pressed with electric leakage if hang down; Controller PLC is sent instruction and is made its disconnection through optical coupling isolator control lv contactor, and then cutoff low is externally supplied power; Primary controller carries out the loop detection of electrical leakage subsequently; The detection of electrical leakage signal is sent into the PLC controller through optical coupling isolator, and controller carries out data processing to judge whether the combined switch major loop leaks electricity, if electric leakage is not allowed this loop start with regard to locking; If leakproof then allow this loop start; Primary controller is received the startup command that keyboard or guide send, and primary controller sends enabled instruction through optical coupling isolator or the adhesive of isolated amplifier control loop contactor, this loop start; Connect main circuit power, motor gets electric operation; Main circuit current converts the voltage signal of 0-5V into through analog module, and this signal is transferred to the PLC controller, and the PLC controller, shows data transmission motor overload, phase shortage, short-circuit protection according to signal magnitude simultaneously to LCDs.Break off the vacuum contact during faults such as the loop is short-circuited when detecting, overload, phase shortage immediately, failure message is presented on the liquid crystal display.Mix temperature sensor through outside intrinsic safety interface, can realize motor overheating is protected.

The above embodiment that lifts only uses to conveniently illustrating the utility model, and at the said technical scheme category of the utility model, the person of ordinary skill in the field does various simple deformation and modification, all should be included in the above claim.

Claims (3)

1. mine explosion-suppression combined switch primary controller, it is characterized in that: described primary controller comprises the PLC controller, the optical coupling isolator, isolated amplifier, analog quantity input unit and the power supply that join with the PLC controller; The PLC controller joins through the switching value in optical coupling isolator and the combined switch, through the contactor in the isolated amplifier control switchgroup, joins through the electric current in analog quantity input unit and the combined switch, voltage sensor.

2. mine explosion-suppression combined switch primary controller as claimed in claim 1 is characterized in that: described optical coupling isolator receives four road pilot signals, emergent stop signal, switching value input/output signal, methane transducer signal and loop emergent stop signal in the combined switch.

3. mine explosion-suppression combined switch primary controller as claimed in claim 1 is characterized in that: described analog input device receives outside four road three-phase current signals, low pressure electric leakage signal, detection of electrical leakage signal and outside associated sensor signal.

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