CN202864726U

CN202864726U - Electric control unit of crane

Info

Publication number: CN202864726U
Application number: CN 201220509655
Authority: CN
Inventors: 李佩华
Original assignee: Tianjin Hoisting Equipment Co Ltd
Current assignee: Tianjin Hoisting Equipment Co Ltd
Priority date: 2012-09-27
Filing date: 2012-09-27
Publication date: 2013-04-10
Anticipated expiration: 2022-09-27

Abstract

The utility model discloses an electric control unit of a crane, and belongs to the technical field of crane electrical control. The electric control unit comprises a three-phase power supply terminal and a relay which is electrically connected with the motor of the crane; the three-phase power supply terminal is electrically connected with the power supply terminal of the relay, wherein the relay is a composite solid-state relay; and the electric control unit further comprises a control circuit which is electrically connected with the composite solid-state relay, and the control circuit comprises a power module and a program controller which is electrically connected with the power module. According to the electric control unit, the performances of an electronic power switch and a mechanical switch are 'composited'together, the excellent characteristic of 'zero differential pressure' on and 'zero current' off of the solid-state relay and a mechanical relay are utilized to maintain the low power consumption characteristic in an on state, the mechanical relay is used to maintain a load on state, surge current at an input moment, an arc discharge phenomenon which is generated due to disconnection and on-off interference when the mechanical relay is separately used in certain occasions are avoided, and the high temperature which is generated due to voltage reduction and power consumption when the solid-state relay and a silicon-controlled switch operate are avoided.

Description

The electrical controller of hoisting crane

Technical field

The utility model belongs to hoisting crane Electrical Control Technology field, particularly relates to a kind of electrical controller of hoisting crane.

Background technology

As everyone knows, along with the fast development of society, it is more and more extensive that the field of application of hoisting crane becomes, and the electrical controller of conventional hoist adopts following two kinds of technical schemes mostly: one, mechanical relay control; Find that by long-term practice there is work moment generation surge current in the technical scheme of this mechanical relay control, produces again the arcing phenomenon when quitting work, and brings great potential safety hazard therefore often for the electrical controller of hoisting crane; Two, electronic power switch control; Find that by long-term practice there is faster defective of power consumption height, temperature rise in this electronic power switch.

Summary of the invention

The technical problems to be solved in the utility model is: improve by the electrical controller to conventional hoist, the electrical controller of a kind of current collection power electronic switch and mechanical switch " compound " all-in-one-piece hoisting crane is provided.

The technical scheme that the utility model is taked for the technical matters that exists in the solution known technology is:

A kind of electrical controller of hoisting crane comprises: three phase mains terminal, the relay that is electrically connected with the motor of hoisting crane; Described three phase mains terminal is electrically connected with the terminals for power supplies of described relay; It is characterized in that: described relay is the composite solid relay; Also comprise the control loop that is electrically connected with described composite solid relay, described control loop comprises: power module and the programming controller that is electrically connected with described power module.

Further: also be provided with total contactless switch and air switch between described terminals for power supplies and the described relay;

Further: described power module comprises successively and to be electrically connected: adjustable transformer and supply transformer;

Further: described motor is the three-phase squirrel cage asynchronous dynamo.

Advantage and the good effect that the utlity model has are: by adopting technique scheme, the utility model is integral electronic power switch and mechanical switch performance " compound ", low-power consumption characteristic when utilizing " zero pressure difference " of solid-state relay opened and " zero current " turn-offs good characteristic and mechanical relay to keep opening, keep load to connect with mechanical relay, avoided some occasion to use separately mechanical relay to drop into causing moment surge current and the arcing phenomenon and the break-make that produce when withdrawing from disturb, reduced simultaneously solid-state relay, the high temperature that the pressure drop power consumption produces in the transwitch operational process.

Description of drawings

Fig. 1 is the electrical connection diagram of the electrical controller of a kind of hoisting crane of the utility model; Be mainly used in showing the annexation of major loop;

Fig. 2 is the electrical connection diagram of the electrical controller of a kind of hoisting crane of the utility model; Be mainly used in showing the annexation of control loop;

Fig. 3 is the electrical connection diagram of the electrical controller of a kind of hoisting crane of the utility model; Be mainly used in the annexation of display routine controller.

Wherein: 1, three phase mains terminal; 2, relay.

The specific embodiment

For further understanding utility model content of the present utility model, Characteristic, hereby exemplify following examples, and cooperate accompanying drawing to be described in detail as follows:

See also Fig. 1, a kind of electrical controller of hoisting crane comprises: three phase mains terminal 1, relay 2, total contactless switch K10, air switch Q21 and control loop; Three phase mains terminal 1 by total contactless switch K10 and air switch Q21 after the terminals for power supplies of relay 2 be electrically connected; The lead-out terminal of relay 2 is electrically connected with the motor of hoisting crane; Wherein: relay 2 is the composite solid relay, and the motor of hoisting crane is the three-phase squirrel cage asynchronous dynamo, and control loop comprises: power module and the programming controller that is electrically connected with power module, the lead-out terminal of above-mentioned power module is electrically connected with relay 2.

See also Fig. 2, Fig. 3, power module comprises successively and to be electrically connected: adjustable transformer T100 and supply transformer DY; Power supply AC380V; 50HZ is by adjustable transformer T100; AC380V is become AC220V; again by supply transformer DY; AC220V is become DC24V; by pocket torch door control button S110; relief relay K01 is connected; the normal battle of relief relay K01 is closed simultaneously; pocket torch door control button S110 self-locking; play the mistake effect and pressed the effect of protecting; after relief relay K01 connects; total contactless switch K10 connects, and button S211 will hoist; the auxiliary battle of decline button S212 and air switch Q21 and the auxiliary battle of relief relay K01, the input port of joining procedure controller KZQ; the contactless switch K21 that hoists, decline contactless switch K22 is electrically connected with the output port of programming controller KZQ.

Plugged, press the button S211 that hoists, by programming controller KZQ, the contactless switch K21 that will hoist connects, the composite solid relay is just connected, realized the motor forward operation of hoisting crane, otherwise, press decline button S212, by programming controller KZQ, decline contactless switch K22 is connected, and the composite solid relay is just connected, and has realized the motor reversal operation.Pocket torch door control button S120 is stop button, when the hoisting crane operation is in an emergency, presses scram button S120, in order to guarantee the safe operation of hoisting crane.When the motor operation of hoisting crane is broken down; the protection switch Q21 of control lifting motor operation opens, and the secondary contact of protection switch are opened, and failure code is transmitted by the RS485 communication bus; be presented on the read-out of pocket torch door control button, inform the operator.

More than embodiment of the present utility model is had been described in detail, but described content only is preferred embodiment of the present utility model, can not be considered to be used to limiting practical range of the present utility model.All equalizations of doing according to the utility model application range change and improve etc., all should still belong within the patent covering scope of the present utility model.

Claims

1. the electrical controller of a hoisting crane comprises: three phase mains terminal, the relay that is electrically connected with the motor of hoisting crane; Described three phase mains terminal is electrically connected with the terminals for power supplies of described relay; It is characterized in that: described relay is the composite solid relay; Also comprise the control loop that is electrically connected with described composite solid relay, described control loop comprises: power module and the programming controller that is electrically connected with described power module.

2. the electrical controller of hoisting crane according to claim 1 is characterized in that: also be provided with total contactless switch and air switch between described terminals for power supplies and the described relay.

3. the electrical controller of hoisting crane according to claim 1 is characterized in that: described power module comprises and being electrically connected successively: adjustable transformer and supply transformer.

4. the electrical controller of hoisting crane according to claim 1, it is characterized in that: described motor is the three-phase squirrel cage asynchronous dynamo.