CN208539550U

CN208539550U - A kind of control device of contactor for preventing adhesion

Info

Publication number: CN208539550U
Application number: CN201821197036.3U
Authority: CN
Inventors: 姚镇波; 田瑞瑞
Original assignee: Jinchen Machinery Co Ltd
Current assignee: Jinchen Machinery Co Ltd
Priority date: 2018-07-26
Filing date: 2018-07-26
Publication date: 2019-02-22
Anticipated expiration: 2028-07-26

Abstract

A kind of control device of contactor for preventing adhesion, including input module, the input module is connected separately with the first intermediate relay KA10 by conducting wire, second intermediate relay KA11 and third intermediate relay KA12, the first intermediate relay KA10, the coil of second intermediate relay KA11 and third intermediate relay KA12 are connected separately with first contactor KM1, second contactor KM2 and third contactor KM2, the auxiliary contact of first contactor KM1 are connected with No. four input pins of a PLC controller, the auxiliary contact of second contactor KM2 are connected with the auxiliary contact of third contactor KM2 and access No. five input pins of PLC controller；Normally-closed contact is measured in real time by the mode of connection of the auxiliary contact in PLC controller and contactor, prevents the appearance of contact adhesion phenomenon；Access corresponding contactor by the coil of the intermediate relay on device, device protected, the electric current in anti-locking apparatus with it is excessive.

Description

A kind of control device of contactor for preventing adhesion

Technical field:

The utility model relates to a kind of control devices of contactor for preventing adhesion.

Background technique:

In industrial control field, controller control capability is big, can frequent operation and far distance control, be automatically control One of critical elements in system are particularly suitable for Motor Control field.But for the motor of frequent starting, it is easy to There is the phenomenon for keeping motor out of control because of the contact adhesion of contactor, cause mechanical accident and damage to person, exists greatly Security risk.

Utility model content:

The utility model provides a kind of control device of contactor for preventing adhesion, reasonable in design, can be in motor During operating, realizes the detection in advance to contact adhesion phenomenon, enable motor safe handling, eliminate existing safety Hidden danger improves the stability of device, solves problems of the prior art.

Used technical solution is the utility model to solve above-mentioned technical problem:

A kind of control device of contactor for preventing adhesion, including input module, the input module are separately connected by conducting wire There are the first intermediate relay KA10, the second intermediate relay KA11 and third intermediate relay KA12, the first intermediate relay The coil of device KA10, the second intermediate relay KA11 and third intermediate relay KA12 are connected separately with first contactor KM1, No. four input pins of two contactor KM2 and third contactor KM2, the auxiliary contact of first contactor KM1 and a PLC controller It is connected, the auxiliary contact of second contactor KM2 are connected and access the five of PLC controller with the auxiliary contact of third contactor KM2 Number input pin；The main contacts of second contactor KM2 and main contacts phase and the company of third contactor KM3, then with first contactor The main contacts of KM1 is connected in series, and connects at the main contacts and the binding site of the main contacts of third contactor KM3 of second contactor KM2 There is motor, the main contacts of the first contactor KM1 is connected with three-phase wire.

Several breakers are equipped between the main contacts and three-phase wire of the first contactor KM1.

The model CJ1W-OC211 of the input module.

The auxiliary contact of the first contactor KM1 are normally opened contact, the second contactor KM2 and third contactor The auxiliary contact of KM2 are normally-closed contact.

The utility model using the above structure, passes through the mode of connection pair of the auxiliary contact in PLC controller and contactor Normally-closed contact is measured in real time, and prevents the appearance of contact adhesion phenomenon；It is accessed by the coil of the intermediate relay on device Corresponding contactor, protects device, the electric current in anti-locking apparatus with it is excessive；By in PLC controller and contactor Information adjusts the operating condition of motor to main contacts based on the received, guarantees that motor is not out of control, the safety of lifting device； Short-circuit protection effect is provided to contactor by breaker, prevents contactor from burning out；With safe and reliable, high excellent of precision Point.

Detailed description of the invention:

Fig. 1 is the structural schematic diagram of the utility model.

Fig. 2 is the contactor auxiliary contact of the utility model and the electrical schematic diagram of PLC controller.

Fig. 3 is the contactor main contacts of the utility model and the electrical schematic diagram of motor.

Fig. 4 is the programming ladder diagram that the PLC of the utility model is controlled.

In figure, 1, input module, 2, PLC controller, 3, motor, 4, breaker.

Specific embodiment:

In order to clarify the technical characteristics of the invention, below by specific embodiment, and its attached drawing is combined, to this reality It is described in detail with novel.

As shown in figs. 1-4, a kind of control device of contactor for preventing adhesion, including input module 1, the input module 1 It is connected separately with the first intermediate relay KA10, the second intermediate relay KA11 and third intermediate relay KA12 by conducting wire, The coil of the first intermediate relay KA10, the second intermediate relay KA11 and third intermediate relay KA12 are connected separately with First contactor KM1, second contactor KM2 and third contactor KM2, the auxiliary contact of first contactor KM1 and a PLC are controlled No. four input pins of device 2 are connected, and the auxiliary contact of second contactor KM2 are connected simultaneously with the auxiliary contact of third contactor KM2 Access No. five input pins of PLC controller 2；The main contacts of the main contacts of second contactor KM2 and third contactor KM3 are mutually simultaneously Even, it then is connected in series with the main contacts of first contactor KM1, the main touching of the main contacts and third contactor KM3 of second contactor KM2 It is connected with motor 3 at the binding site of point, the main contacts of the first contactor KM1 is connected with three-phase wire.

Several breakers 4 are equipped between the main contacts and three-phase wire of the first contactor KM1.

The model CJ1W-OC211 of the input module 1.

In use, opening input module 1, carrying out information collection to the operating condition of motor 3 and being converted to electric signal, lead to It crosses intermediate relay and contactor is transferred to PLC controller 2, PLC controller 2 starts, the main touching of PLC controller 2 and contactor Point matches, and adjusts the operating condition of motor 3, and the breaker 4 between the main contacts and three-phase wire of first contactor KM1 is right Device plays a protective role, and prevents electric current excessive and burns out motor 3；The auxiliary contact of first contactor KM1 are normally opened contact, The auxiliary contact of second contactor KM2 and third contactor KM3 are normally-closed contact, according to the program in PLC controller 2, second When contact adhesion occurs for the normally-closed contact of contactor KM2 and the normally-closed contact of third contactor KM3, the first intermediate relay KA10 It disconnects, so that first contactor KM1 is disconnected, the main contacts and three-phase wire of first contactor KM1 is disconnected, and motor 3 stops fortune Turn, prevent wrong connection, so as to avoid the injury of contactor adhesion bring, realizes the inspection in advance to contactor adhesion phenomenon It surveys.

Above-mentioned specific embodiment cannot function as the limitation to scope of protection of the utility model, for the skill of the art For art personnel, any alternate modification or transformation made to the utility model embodiment all fall within the guarantor of the utility model It protects in range.

Place is not described in detail for the utility model, is the well-known technique of those skilled in the art of the present technique.

Claims

1. a kind of control device of contactor for preventing adhesion, it is characterised in that: including input module, the input module passes through conducting wire It is connected separately with the first intermediate relay KA10, the second intermediate relay KA11 and third intermediate relay KA12, described first The coil of intermediate relay KA10, the second intermediate relay KA11 and third intermediate relay KA12 are connected separately with the first contact Device KM1, second contactor KM2 and third contactor KM2, No. four of the auxiliary contact of first contactor KM1 and a PLC controller Input pin is connected, and the auxiliary contact of second contactor KM2 are connected with the auxiliary contact of third contactor KM2 and access PLC control No. five input pins of device processed；The main contacts of second contactor KM2 and main contacts phase and the company of third contactor KM3, then with The main contacts of one contactor KM1 is connected in series, the combination of the main contacts of the main contacts and third contactor KM3 of second contactor KM2 It is connected with motor at point, the main contacts of the first contactor KM1 is connected with three-phase wire.

2. a kind of control device of contactor for preventing adhesion according to claim 1, it is characterised in that: the first contactor Several breakers are equipped between the main contacts and three-phase wire of KM1.

3. a kind of control device of contactor for preventing adhesion according to claim 1, it is characterised in that: the input module Model CJ1W-OC211.

4. a kind of control device of contactor for preventing adhesion according to claim 1, it is characterised in that: the first contactor The auxiliary contact of KM1 are normally opened contact, and the auxiliary contact of the second contactor KM2 and third contactor KM2 are normally-closed contact.