CN202988591U

CN202988591U - Electric single beam crane control circuit

Info

Publication number: CN202988591U
Application number: CN 201220680230
Authority: CN
Inventors: 马永红; 赵雁俊; 贾春霞
Original assignee: Chongqing Crane Works Co Ltd
Current assignee: Chongqing Crane Works Co Ltd
Priority date: 2012-12-11
Filing date: 2012-12-11
Publication date: 2013-06-12
Anticipated expiration: 2022-12-11

Abstract

The utility model discloses an electric single beam crane control circuit. A protective circuit comprises a crane control box circuit and a horn control box circuit, wherein a total contactor K0 in the horn control box circuit is in series connection with a scram button JTA. The control circuit is characterized in that a power line which is used for supplying power for a cart running motor in the crane control box circuit is connected with the rear end of a contact of the total contactor K0 in the horn control box circuit; and when the scram button JTA is pressed down, the contact of the total contactor K0 is switched off, and the power supply of the cart motor is switched off, so that the cart stopping is realized. The control circuit is simple in structure, and can effectively switch off the power supply of the cart motor when a main contract of a forward contactor K1 or a reverse contactor K2 of the cart is bonded, so that the security of the system operation is fully guaranteed.

Description

A kind of mono beam overhead crane control circuit

Technical field

The utility model relates to a kind of control circuit.

Background technology

The lifting mechanism of existing mono beam overhead crane all adopts electric block, and electric block is a finished product of cucurbit manufacturer production, just can use separately after energising.Establish total contactless switch, voltage transformer, cucurbit lifting contactless switch, cucurbit operation conversing contactor in the electric cabinet that electric block carries.Main breaker, the positive contactor K1 of cart operation, counter-rotating contactless switch K2 are set in the control box of hoisting crane.After the control box of the power supply of whole hoisting crane access hoisting crane, the power supply of cucurbit the main breaker in the control box of hoisting crane, 1L1,1L2,1L3 access.As shown in Figure 2, pocket torch door is contained on cucurbit, reserves action button 5QA, the 6QA of cart on pocket torch door.Car load control loop voltage is provided by the voltage transformer in the cucurbit control box, and the control of cart need to be drawn from the cucurbit control box by cable, as in Fig. 1 and Fig. 2 14,, shown in 16,1.

Start and stop element all at the cucurbit control box.In the normal situation of contactless switch, when needing sudden stop, press the scram button JTA on pocket torch door, disconnect total contactless switch K0 coil power, the control loop dead electricity, each mechanism's conversing contactor disconnects, and the motor outage stops.

But this kind structure easily causes following problem:

(1) because conversing contactor is wanted frequent adhesive, disconnection, the contact curent change is large, and is easily bonding.When the positive contactor K1 of cart or counter-rotating contactless switch K2 main contact bonding, even take scram button, disconnect control loop voltage, cart control contactor main contact can't separate.Large mechanism of car will be walked towards a direction always.

(2) if the operating personal reflection rapidly, is controlled the circuit breaker of hoisting crane power supply in the workshop switch box of leaving behind, the power supply of the hoisting crane that breaks, hoisting crane just can stop.If but the operating personal reaction is slow or workshop switch box distance, the power supply of hoisting crane has little time to break, hoisting crane has been walked far, if hang lift heavy thing and highly very low on suspension hook, the consequences such as wayside equipment, shock car bumper device, damage factory building will occur during this time hurting sb.'s feelings, breaking, can occur that even car bumper is hit rotten rear hoisting crane and run out of the situation that track falls down.

The utility model content

It is a kind of after cart forward or reverse main noddle on contactor is bonding that the purpose of this utility model is to provide, and the scram button of pressing pocket torch door just can disconnect the cargo motor power supply, the mono beam overhead crane control circuit that cart is stopped.

To achieve these goals, by the following technical solutions: a kind of mono beam overhead crane control circuit, described circuit comprises crane control case circuit and cucurbit control box circuit, wherein in cucurbit control box circuit, total contactless switch K0 connects with scram button JTA, it is characterized in that: in crane control case circuit in the power lead of cart operation motor power supply and cucurbit control box always the contact rear end of contactless switch K0 be connected, when pressing scram button JTA, total contactless switch K0 contact disconnects, the cargo motor power supply that breaks is realized stopping.

The utility model is simple in structure, can actv. closes the cargo motor power supply at the positive contactor K1 of cart or counter-rotating contactless switch K2 main contact when bonding, has fully ensured system's Operation safety.

Description of drawings

Fig. 1 is crane control case schematic circuit diagram in prior art;

Fig. 2 is cucurbit control box schematic circuit diagram in prior art;

Fig. 3 is crane control case schematic circuit diagram in the utility model;

The specific embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described further:

As shown in Figure 3, a kind of mono beam overhead crane control circuit, described circuit comprises crane control case circuit and cucurbit control box circuit, wherein in cucurbit control box circuit, total contactless switch K0 connects with scram button JTA, in crane control case circuit in the power lead of cart operation motor power supply and cucurbit control box always the contact rear end of contactless switch K0 be connected, be that in X11, X12 and X13 and the Fig. 3 in Fig. 2, X11, X12 are connected with X13, when pressing scram button JTA, total contactless switch K0 contact disconnects, the cargo motor power supply that breaks is realized stopping.

Claims

1. mono beam overhead crane control circuit, described circuit comprises crane control case circuit and cucurbit control box circuit, wherein in cucurbit control box circuit, total contactless switch K0 connects with scram button JTA, it is characterized in that: in crane control case circuit in the power lead of cart operation motor power supply and cucurbit control box always the contact rear end of contactless switch K0 be connected, when pressing scram button JTA, total contactless switch K0 contact disconnects, and the cargo motor power supply that breaks is realized stopping.