CN2500660Y - Automatic controller for crane moving - Google Patents

Abstract

A travel automatic controller for cranes is provided, which mainly comprises forward and reverse contactors, forward and reverse start switches, a slow release time relay, a slow lifting time relay, a contactor, approach switches, and an adjustable resistor. The approach switches (Ck1, Ck2, Ck3, Ck4) are arranged at the outer margin in front of the wheel of the crane, to detect whether the wheel bites the track; and the output power of the travel motor of the crane is controlled upon the detected signal, thereby controlling the travel speed and preventing the track-biting problem of wheel. The utility model can prolong the service life of wheel, track, electrical unit and transmission system of the crane, reduce the energy consumption, increase the work efficiency, and reduce the failure rate. The utility model provides a novel and practicable product in the field of electric control for bridge cranes or gantry cranes.

Description

Hoisting crane walking auto mat

The utility model relates to engineering goods electrical equipment control field, exactly belongs to crane in bridge type or transfer crane electrical equipment control field.

At present, direction of travel offset track phenomenon often appears in existing crane in bridge type of China or transfer crane when load is walked, cause vehicle wheel rim and track side surfaces to rub mutually, " gnawing rail " phenomenon that people often carry appears, the resistance of the normal operation of hoisting crane is the rolling power between wheel tread and the track tread, and the resistance of wheel gnawing rail is friction force (actual is shearing force) and the normal rolling power sum of moving between vehicle wheel rim and the track side surfaces, it generally is to four times of normal running resistance, because the existence of this additional resistance, no matter hoisting crane is mechanical driving part if being in operation, still current segment all is an overload operation, and the wheel rim wearing and tearing are accelerated, and the track operating cycles shortens, and electrical motor and electrical part are fragile, cause equipment part frequently to overhaul replacing, bring significant wastage to the user.

But the purpose of this utility model just provides a kind of automatic compensation hoisting crane speed of travel, prevents the auto--tuning controller that wheel " is gnawed rail ".

The utility model mainly is by forward and reverse contactless switch, forward and reverse starting switch, slow release time relay, slow pick up time relay, contactless switch, constitutes near elements such as switch, adjustable resistances, by installing near switch in the hoisting crane wheel outside, be used for whether detecting wheel " gnawing rail ", with the detected signal control hoisting crane output power of motor that travels, thereby reach the control moving velocity, prevent the purpose that wheel " is gnawed rail ".

Introduce the utility model in detail below in conjunction with accompanying drawing.

Fig. 1: the utility model circuit diagram.

Fig. 2: near switch position scheme drawing

Fig. 3: the utility model shell scheme drawing.

Among the figure: KM1 is the forward contactless switch, KM2 is reverse contactless switch, KT1, KT2 are the slow release time relay, KM3, KM4 are contactless switch, and KT3, KT4 are the slow pick up time relay, and KM5, KM6 are contactless switch, CK1, CK2, CK3, CK4 are near switch, 1R, 2R, 3R, 4R adjustable resistance, SA1 are the forward starting switch, and SA2 is reverse starting switch.

The utility model is made up of circuit control part and control housing, the circuit control part is by forward contactless switch KM1, reverse contactless switch KM2, slow release time relay (KT1, KT2), contactless switch (KM3, KM4), slow pick up time relay (KT3, KT4), contactless switch (KM5, KM6), near switch (CK1, CK2, CK3, CK4), adjustable resistance (1R, 2R, 3R, 4R), forward starting switch SA1, oppositely starting switch SA2 forms, on hoisting crane major loop forward travel motor 1M armature loop, be connected to contactless switch KM3 open contact KM3-1, be connected in parallel on again on the open contact KM3-1 after adjustable resistance R1 and the adjustable resistance R3 series connection, the open contact KM5-1 of contactless switch KM5 is in parallel with adjustable resistance 3R, on hoisting crane major loop backward going motor 2M armature loop, be connected to contactless switch KM4 open contact KM4-1, be connected in parallel on again on the open contact KM4-1 after adjustable resistance 2R and the adjustable resistance 4R series connection, the open contact KM6-1 of contactless switch KM6 is in parallel with adjustable resistance 4R, the control loop power supply is drawn from two phase lines of main power source, be respectively X end and Y end, forward contactless switch KM1 and forward starting switch SA1, oppositely be connected to X after the normally closed contact KM2-1 of the contactless switch KM2 series connection, the Y two ends, oppositely contactless switch KM2 and oppositely starting switch SA2, be connected to X after the normally closed contact KM1-1 series connection of forward contactless switch KM1, the Y two ends, slow release time relay K T1 with near switch CK1, oppositely be connected to X after the open contact KM2-2 of the contactless switch series connection, the Y two ends, slow release time relay K T1 with near switch CK2, be connected to X after the open contact KM1-2 series connection of forward contactless switch, the Y two ends, slow release time relay K T2 with near switch CK3, oppositely be connected to X after the open contact KM1-2 of the contactless switch series connection, the Y two ends, slow release time relay K T2 with near switch CK4, be connected to X after the open contact KM1-2 series connection of forward contactless switch, the Y two ends, contactless switch KM3 connects with the normally closed contact KT1-1 of slow release time relay and is connected to X, the Y two ends, contactless switch KM4 connects with the normally closed contact KT2-1 of slow release time relay and is connected to X, the Y two ends, slow pick up time relay K T3 be connected to X after the open contact KT1-2 of slow release time relay connects, the Y two ends, slow pick up time relay K T4 be connected to X after the open contact KT2-2 of slow release time relay connects, the Y two ends, contactless switch KM5 be connected to X after the normally closed contact KT3-1 of slow pick up time relay connects, the Y two ends, contactless switch KM6 be connected to X after the normally closed contact KT4-1 of slow pick up time relay connects, the Y two ends, the circuit control part of formation is installed in the control housing.

The utility model wheel is represented with A, B, C, D respectively, is installed in about 10 centimeters places, the forward and reverse the place ahead of travelling of wheel respectively near switch CK1, CK2, CK3, CK4, and with felly (see figure 2) on same straight line.Principle of work of the present utility model is: the positive and negative walking of hoisting crane converts by contactless switch KM1 and contactless switch KM2, if hoisting crane backward going contactless switch KM2 coil gets electronic work by contactless switch normally closed contact KM1-1, simultaneously, reverse contactless switch open contact KM2-2 closure, provided power supply near switch CK1 and CK2, when A takes turns outer rim near track, near the switch CK1 closing of contact, slow release time relay K T1 gets electronic work, normally closed contact KT1 disconnects, contactless switch KM3 normally closed contact KM3-1 is disconnected from being closed into dead electricity, simultaneously, be serially connected in the first order adjustable resistance 1R addition of crane motor 1M armature loop, the armature loop electric current is by adjustable resistance 1R, the open contact KM5-1 of second stage contactless switch KM5 makes the rotating speed decline one-level of electrical motor 1M by starting speed change resistance 1RD.If first order setting-up time is 6 seconds, first order governing time was above 6 seconds, second stage slow pick up time relay K T3 gets electronic work by slow release time relay K T1 open contact KT1-2, the open contact KM5-1 of second stage contactless switch KM5 disconnects from being closed into dead electricity simultaneously, make second stage adjustable resistance 3R addition, make the rotating speed of the electrical motor 1M one-level that descends again, till A wheel outer rim is not gnawed rail recovery normally, that is: near the switch CK1 disconnection that resets, slow release time relay K T1 dead electricity, normally closed contact KT1-1 conducting, contactless switch KM3 gets electric closure, and simultaneously, slow release time relay K T1 open contact KT1-2 disconnects, slow pick up time relay K T3 dead electricity normally closed contact KT3-1 closure, contactless switch KM5 gets electric closure.When if B takes turns outer rim near track, near the switch CK3 closing of contact, slow release time relay K T2 gets electronic work, normally closed contact KT2-1 disconnects, contactless switch KM4 normally closed contact KM4-1 is disconnected from being closed into dead electricity, simultaneously, be serially connected in the first order adjustable resistance 2R addition of crane motor 2M armature loop, the armature loop electric current makes the rotating speed decline one-level of electrical motor 2M by the open contact KM6-1 of adjustable resistance 2R, second stage contactless switch KM6 by starting speed change resistance 2RD.If first order setting-up time is 6 seconds, first order governing time was above 6 seconds, second stage slow pick up time relay (8) gets electronic work by slow release time relay K T2 open contact KT2-2, the open contact KM6-1 of second stage contactless switch KM6 disconnects from being closed into dead electricity simultaneously, make second stage adjustable resistance 4R addition, make the rotating speed of the electrical motor 2M one-level that descends again, till A wheel outer rim is not gnawed rail recovery normally, that is: near the switch CK3 disconnection that resets, slow release time relay K T2 dead electricity, normally closed contact KT2-1 conducting, contactless switch KM4 gets electric closure, simultaneously, slow release time relay K T2 open contact KT2-2 disconnects, slow pick up time relay K T4 dead electricity, its normally closed contact KT4-1 closure, contactless switch KM6 gets electric closure, makes electrical motors arrive the purpose of reduction of speed.The utility model controls crane motor 1M simultaneously and 2M starting speed change resistance reaches the self-align purpose with the speed operation, and hoisting crane forward travel principle is identical.

The utility model forward contactless switch KM1 and reverse contactless switch KM2 can select CJ12B-250 for use, contactless switch KM3, KM4, KM5, KM6 can select CJ12B-150 for use, slow release time relay K T1, KT2 can select JS27A-10/1 for use, slow pick up time relay K T3, KT4 can select JS27A-1/1 for use, can select QE-G-K8AC for use near switch CK1, CK2, CK3, CK4, adjustable resistance 1R, 2R, 3R, 4R can select DW-184R for use, and forward starting switch SA1 and reverse starting switch SA2 can select THQ1-211/F511 for use.

The utility model is on the basis that does not change the original electrical machinery performance of hoisting crane, other increases a control circuit, by detect the wheel situation of " gnawing rail " near switch CK1, CK2, CK3, CK4, by at motor rotor winding series resistor control wheel velocity, prevent that " gnawing rail " phenomenon from taking place.Use the utility model can prolong hoisting crane wheel, track, electric and driving system service life, cut down the consumption of energy, increase work efficiency, reduce fault rate, a kind of product of novel practical is provided for crane in bridge type or transfer crane electrical equipment control field.

Claims (1)

1, a kind of hoisting crane walking auto mat, it is characterized in that it is made up of circuit control part and control housing, the circuit control part is by forward contactless switch KM1, reverse contactless switch KM2, slow release time relay (KT1, KT2), contactless switch (KM3, KM4), slow pick up time relay (KT3, KT4), contactless switch (KM5, KM6), near switch (CK1, CK2, CK3, CK4), adjustable resistance (1R, 2R, 3R, 4R), forward starting switch SA1, oppositely starting switch SA2 forms, on hoisting crane major loop forward travel motor 1M armature loop, be connected to contactless switch KM3 open contact KM3-1, be connected in parallel on again on the open contact KM3-1 after adjustable resistance R1 and the adjustable resistance R3 series connection, the open contact KM5-1 of contactless switch KM5 is in parallel with adjustable resistance 3R, on hoisting crane major loop backward going motor 2M armature loop, be connected to contactless switch KM4 open contact KM4-1, be connected in parallel on again on the open contact KM4-1 after adjustable resistance 2R and the adjustable resistance 4R series connection, the open contact KM6-1 of contactless switch KM6 is in parallel with adjustable resistance 4R, the control loop power supply is drawn from two phase lines of main power source, be respectively X end and Y end, forward contactless switch KM1 and forward starting switch SA1, oppositely be connected to X after the normally closed contact KM2-1 of the contactless switch KM2 series connection, the Y two ends, oppositely contactless switch KM2 and oppositely starting switch SA2, be connected to X after the normally closed contact KM1-1 series connection of forward contactless switch KM1, the Y two ends, slow release time relay K T1 with near switch CK1, oppositely be connected to X after the open contact KM2-2 of the contactless switch series connection, the Y two ends, slow release time relay K T1 with near switch CK2, be connected to X after the open contact KM1-2 series connection of forward contactless switch, the Y two ends, slow release time relay K T2 with near switch CK3, oppositely be connected to X after the open contact KM1-2 of the contactless switch series connection, the Y two ends, slow release time relay K T2 with near switch CK4, be connected to X after the open contact KM1-2 series connection of forward contactless switch, the Y two ends, contactless switch KM3 connects with the normally closed contact KT1-1 of slow release time relay and is connected to X, the Y two ends, contactless switch KM4 connects with the normally closed contact KT2-1 of slow release time relay and is connected to X, the Y two ends, slow pick up time relay K T3 be connected to X after the open contact KT1-2 of slow release time relay connects, the Y two ends, slow pick up time relay K T4 be connected to X after the open contact KT2-2 of slow release time relay connects, the Y two ends, contactless switch KM5 be connected to X after the normally closed contact KT3-1 of slow pick up time relay connects, the Y two ends, contactless switch KM6 be connected to X after the normally closed contact KT4-1 of slow pick up time relay connects, the Y two ends, the circuit control part of formation is installed in the control housing.

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