CN201639359U

CN201639359U - Mine-used explosion-proof intrinsically safe combined switch

Info

Publication number: CN201639359U
Application number: CN2010200001482U
Authority: CN
Inventors: 王东兴
Original assignee: QINGDAO TIANXIN ELECTRIC CO Ltd
Current assignee: Huaxia Tianxin intellectual property Limited by Share Ltd
Priority date: 2010-01-06
Filing date: 2010-01-06
Publication date: 2010-11-17
Anticipated expiration: 2020-01-06

Abstract

The utility model relates to a mine-used explosion-proof intrinsically safe combined switch, which is characterized in that two groups of PLCs (programmable logic controllers) (4) communicated through a bus (43), two groups of isolating switches (1) connected with high-voltage lines, and four-way drive devices (2) respectively connected to the PLCs in a hanging manner are included, wherein each group of isolating switches (1) controls the four-way drive devices (2). The utility model adopts a modular design structure, each loop is designed into an independent drive device, and is provided with multiple types of protection, and by adopting modular design and convenient plugging technique, the drive devices can meet the requirements for quick handling of underground faults and maintenance; each loop can be independent from other loops, control other loops, as well as be controlled by other loops or serve as a standby; and according to user's requirements, the control mode of the combined switch can be increased, and free combination of the mentioned control functions can be realized. The combined switch can fulfill the function of man-machine interaction through a liquid crystal display and an intrinsically safe keyboard, and also has the functions of fault memory and fault inquiry, thereby conforming to the current and future development of automation of coal mines.

Description

The mine flameproof and intrinsic safety type unit switch

Technical field

The present invention relates to the switch of appliance field, particularly relate to a kind of be used to control many motors of complete set of equipments such as the digging of 3300V working face, transportation and the mine flameproof and intrinsic safety type unit switch of protecting usefulness under the coal mine.

Background technology

The unit switch that use at present in the colliery; the Power Level that major loop connects is generally below 1140V; can not satisfy high-power coal excavation apparatus and rise the demand of holding; the core parts that its protection control system adopts mainly contain single-chip microcomputer, resolution element; reaction speed is slow, and controlled 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 this utility model is to be improved at above-mentioned shortcoming of the prior art, and a kind of mine flameproof and intrinsic safety type unit switch is provided.

The technical solution of the utility model is: a kind of mine flameproof and intrinsic safety type unit switch, described unit switch comprises No. four drive units 2 that articulate on isolating switch group 1 that two groups of PLC controllers 4, two groups by bus 43 communications and high-voltage line join and the every group of PLC controller, every group of isolating switch group 1 control No. four drive units 2; Wherein, the isolating switch group comprises isolation reversing switch 11, isolating transformer 12, detection of electrical leakage 13 and control supply convertor 14; Drive unit 2 comprises vacuum contactor 21, current detection module 22, earth leakage search/lockout detection module 23, guide's control module 24, vacuum contactor 21, guide's control module 24 are joined by I/O module and PLC controller 4, current detection module 22, earth leakage search/lockout module are joined by analog module 42 and PLC controller 4, and guide's control module 24 is joined with circuit for remotely controlling 5.

Preferably: described isolating switch group 1 is joined by high pressure indicating module 3 and high-voltage line.

Preferably: be connected with LCDs 8 and intrinsic safety keyboard 61 on the described PLC controller.

Preferably: described intrinsic safety keyboard 61 joins by communication isolation module 6 and PLC controller.

The beneficial effects of the utility model are: the utility model adopts the modularized design structure; each loop is designed to independently drive unit; all possess kinds of protect, each drive unit adopts the modularized design and the technology of pegging graft easily, satisfies the requirement of down-hole fast processing fault and maintenance.Each loop both can be independent of other loops, and other loops of may command again also can be controlled by other loops or as standby.Can increase control mode according to customer requirements, and can realize the independent assortment of above-mentioned controlled function as required.This product is realized the human-computer dialogue function by liquid crystal display and intrinsic safety keyboard, has fault memory and fault inquiry function, adapts to current and the development of colliery automated system from now on.

Description of drawings

Fig. 1 is a structural representation of the present utility model

Embodiment

Below in conjunction with description of drawings embodiment of the present utility model:

The mine flameproof and intrinsic safety type unit switch has two groups of isolating switch groups 1, and every group of isolating switch group 1 comprises isolates reversing switch 11, isolating transformer 12,127V detection of electrical leakage 13, control supply convertor 14.Interlocking gear is equipped with at isolating switch and Qianmen, and isolating switch does not separate, and the Qianmen can not be opened.The isolating switch auxiliary contact is also being controlled the control loop power supply simultaneously, the isolating switch outage, and control loop cuts off the power supply simultaneously.Externally output 127V accessory power supply has creepage protection function.Every group of isolating switch group 1 control No. 4 drive units 2.Drive unit 2 is made of vacuum contactor 21, current detection module 22, earth leakage search/lockout detection module 23, guide's control module 24.Finish motor starting, stop, principal and subordinate's sequential control, low speed control, High-speed Control, guide's control; Realization is to motor overload, short circuit, phase shortage, overtemperature, earth leakage protective.Each road drive unit 2 is provided with I/O module 41 and analog module 42, I/O module 41 and analog module 42 are suspended on the PLC controller 4 by bus 43, two PLC controllers connect with communication modes by bus 43 again, mix LCDs 8 and intrinsic safety keyboard 61, constituted the control system of unit switch, but the state of visual indicator equipment operation, and can carry out parameter setting.High pressure indication 3 can hommization the indication combined switch electric power whether have.Intrinsic safety sensor interface 7 provides safe interface for peripheral intrinsic safety transducer, for unit switch provides multiple control modes.The utility model is loaded in the flameproof enclosure, and flameproof enclosure designs main chamber, wire connection cavity, three independent cavity in isolating switch chamber, isolating switch chamber independent design, and the isolating switch outage, main chamber is not charged, has guaranteed overhaul of the equipments safety.Drive unit and control loop device are installed in main chamber, and the major loop power line connects with the rear connection chamber by terminal through walls, connect up in wire connection cavity, reduce cable to main chamber control loop electromagnetic interference, improve the stability of a system.Wire connection cavity turnover line has loudspeaker mouth and quick plug mode to occur for two kinds, only changes the demand that a flanged plate can satisfy the user.

During work, judge that according to high pressure indication 3 combined switch electric power has electricity, isolation reversing switch 11, No. 8 drive unit major loop primes of closing have.Isolate reversing switch auxiliary contact closure, 12 level output of control isolating transformer is transformed to multiple power supply through control supply convertor 14, for The whole control system provides power supply.127V detection of electrical leakage 13 does not detect electric leakage, externally exports the 127V auxiliary control source.The pilot signal of start-stop is received by guide's control module 24 in the circuit for remotely controlling 5, guide's control module detects the state of control signal, because when accidental cause causes the line short of signal, guide's control module can in time detect and send to I/O module 41, PLC controller 4 sends the order that stops vacuum contactor 21 immediately, give LCDs 8 simultaneously and show this loop " guide's short circuit ", and the warning reminding user.Guide's control module detect control signal be starting state and internal conversion in 5 seconds to running status, send to the I/O module, faults such as the PLC controller does not leak electricity in controlled loop, then send " opening " and order I/O module 41, drive the vacuum contactor conducting, connect main circuit power, motor gets electric operation.Current detection module 22 converts main circuit current to the voltage signal of 0-5V; this signal is transferred to the PLC controller by analog module 42; the PLC controller, shows transfer of data motor overload, phase shortage, short-circuit protection simultaneously according to signal magnitude to LCDs 8.Disconnect the vacuum contact during faults such as the loop is short-circuited when detecting, overload, phase shortage immediately, fault message is presented on the liquid crystal display screen.Mix temperature sensor by outside intrinsic safety interface 7, can realize motor overheating is protected.

Claims

1. mine flameproof and intrinsic safety type unit switch, it is characterized in that: described unit switch comprises No. four drive units (2) that articulate on isolating switch group (1) that two groups of PLC controllers (4) by bus (43) communication, two groups and high-voltage line join and the every group of PLC controller, every group of isolating switch group (1) control No. four drive units (2); Wherein, the isolating switch group comprises isolation reversing switch (11), isolating transformer (12), detection of electrical leakage (13) and control supply convertor (14); Drive unit (2) comprises vacuum contactor (21), current detection module (22), earth leakage search/lockout detection module (23), guide's control module (24), vacuum contactor (21), guide's control module (24) are joined by I/O module and PLC controller (4), current detection module (22), earth leakage search/lockout module are joined by analog module (42) and PLC controller (4), and guide's control module (24) is joined with circuit for remotely controlling (5).

2. mine flameproof and intrinsic safety type unit switch as claimed in claim 1 is characterized in that: described isolating switch group (1) is joined by high pressure indicating module (3) and high-voltage line.

3. mine flameproof and intrinsic safety type unit switch as claimed in claim 1 is characterized in that: be connected with LCDs (8) and intrinsic safety keyboard (61) on the described PLC controller.

4. mine flameproof and intrinsic safety type unit switch as claimed in claim 3 is characterized in that: described intrinsic safety keyboard (61) joins by communication isolation module (6) and PLC controller.