CN221927827U - Contactor interlocking clamping plate type mechanical interlocking device - Google Patents

Abstract

The utility model relates to the technical field of electric control of bridge cranes, namely, a contactor interlocking card type mechanical interlocking device. It includes an interlocking card connected between an ascending contactor and a descending contactor, the upper end of the interlocking card is provided with a connecting screw hole, and the lower end of the interlocking card is provided with a notch to avoid the moving magnet attraction pole surface; the upper end of the interlocking card is connected to the bottom foot of the moving magnet of the ascending contactor, and the lower end of the interlocking card is overlapped on both sides of the moving magnet attraction pole surface of the descending contactor. The interlocking card in this device has a simple structure and is easy to manufacture. The steel sheet material does not need to be specially purchased, and the leftover scraps used in the project can be used for manufacturing and processing. It is small in size and easy to install, and there is no need to disassemble the contactor components or install them offline. It can be installed and used on-site, with reliable operation, obvious effect and strong practicality.

Description

A contactor interlocking card type mechanical interlocking device

Technical Field

The utility model relates to the technical field of bridge crane electric control, namely a contactor interlocking card plate type mechanical interlocking device.

Background Art

In the prior art, contactors are used as the main control components in the application field of electric control technology. The forward and reverse control of electric control equipment is an indispensable application control method in various reversible transmission systems, which is used to realize the forward and reverse function of the motor. The forward and reverse function of the motor is operated by the contactor through the three-phase power supply, that is, two contactors (forward and reverse) are individually attracted and work, and the power is sent to the motor through reversing to realize the forward and reverse rotation of the motor. Because any phase is reversed, the reversing control of the motor by two contactors is realized. If the two contactors work and attract at the same time, due to the asymmetric phase sequence, it will cause the contactor to attract, causing a phase sequence short circuit fault, which is easy to cause a substation tripping accident in severe cases, which will have a serious impact on production. At present, CJ12 contactors are widely used in the electric control system of bridge cranes, and the above-mentioned shortcomings exist. A simple and practical mechanical interlocking device suitable for CJ12 contactors is needed on site.

Utility Model Content

The purpose of the utility model is to provide a simple and practical contactor interlocking card plate type mechanical interlocking device in view of the above-mentioned shortcomings.

The technical solution of the utility model is: a contactor interlocking card plate type mechanical interlocking device, characterized in that it comprises an interlocking card plate connected between an ascending contactor and a descending contactor, the upper end of the interlocking card plate is provided with a connecting screw hole, and the lower end of the interlocking card plate is provided with a notch avoiding the attraction pole surface of a moving magnet; the upper end of the interlocking card plate is connected to the bottom foot of the moving magnet of the ascending contactor, and the lower end of the interlocking card plate is overlapped at both sides of the attraction pole surface of the moving magnet of the descending contactor.

The contactor model is CJ12 contactor.

The advantages of the utility model are: 1. The interlocking card plate in the device has a simple structure and is easy to manufacture. The steel plate material does not need to be specially purchased, and can be manufactured and processed using the leftover scraps from the project. 2. It is small in size and easy to install, and there is no need to disassemble the contactor parts or install them offline. 3. The equipment is installed and used on site, with reliable action, obvious effect, and strong practicality. 4. The device is suitable for all levels of CJ12 type contactors.

The embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

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

FIG. 2 is a schematic diagram of the left-side structure of FIG. 1 .

FIG. 3 is a simplified structural diagram of the A direction in FIG. 1 .

Figure 4 is a schematic diagram of the interlocking card structure.

DETAILED DESCRIPTION

Referring to Figures 1-4, the names of the parts are as follows: rising contactor 1, falling contactor 2, interlocking card plate 3, screw hole 4, notch 5, moving magnet attraction pole surface 6, attraction coil 7, moving magnet 8, static magnet 9, first arrow direction 10, second arrow direction 11, third arrow direction 12, moving magnet U-shaped slot 13, shaft support frame 14, protective pad 15, screw plastic sleeve 16, and card point 17.

Referring to Figures 1-4, a contactor interlocking card type mechanical interlocking device includes an interlocking card 3 connected between an ascending contactor 1 and a descending contactor 2. The ascending contactor 1 and the descending contactor 2 are the same and are arranged in an upper and lower position to form a chain. The upper end of the interlocking card 3 is provided with a connecting screw hole 4 for connecting with the ascending contactor 1, and the lower end of the interlocking card 3 is provided with a notch 5 (see Figure 4) to avoid the moving magnet attraction pole surface 6, which is conducive to overlapping with the descending contactor 2. The upper end of the interlocking card 3 is connected to the bottom foot of the moving magnet of the ascending contactor 1, and the lower end of the interlocking card 3 is overlapped on both sides of the moving magnet attraction pole surface 6 of the descending contactor 2 (see Figure 3). The contactor model is a CJ12 contactor.

Referring to Fig. 1-3, the working principle is as follows: when the attraction coil 7 of the rising contactor 1 is energized and working, the moving magnet 8 is attracted to the right (see the first arrow direction 10), and fits with the static magnet 9. As the moving magnet 8 is attracted to the right, it drives its interlocking card plate 3 to swing to the left (see the second arrow direction 11). The lower end of the interlocking card plate 3 is caught on both sides of the moving magnet attraction pole surface 6 in the moving magnet U-shaped card groove 13 of the moving magnet 8 of the descending contactor 2, so that the descending contactor 2 cannot move.

When the attraction coil 7 of the descending contactor 2 is powered on, its moving magnet 8 is attracted to the right (see the third arrow direction 12), and fits with its static magnet 9. Since its moving magnet 8 is attracted to the right, the lower part of the interlocking card plate 3 is stuck on both sides of the moving magnet attraction pole surface 6 in the moving magnet U-shaped card slot 13 of the moving magnet 8 of the descending contactor 2, and the upper end of the interlocking card plate 3 is fixed to the bottom of the moving magnet 8 of the ascending contactor 1, which restricts the moving magnet 8 of the descending contactor 2 from attracting. The mechanical interlocking function of the two contactors is realized by the above principle. In order to ensure that no fault occurs when the contactor is reversed, to ensure that the forward monomer contactor works effectively and the reverse contactor cannot be attracted, this device is added to the electrical circuit to prevent the short circuit fault caused by the simultaneous operation of the two contactors. This device is the main interlocking device that mainly prevents the "forward" and "reverse" direction contactors from being attracted at the same time. According to the different forms of the contactors, the size and application types of the interlocking card plate 3 are various.

The above description is only a specific implementation of the present utility model, and various examples do not constitute a limitation on the essential content of the present utility model.

Claims (2)

1. A contactor interlocking card type mechanical interlocking device, characterized in that it includes an interlocking card (3) connected between an ascending contactor (1) and a descending contactor (2), the upper end of the interlocking card (3) having a connecting screw hole (4), and the lower end of the interlocking card (3) having a notch (5) avoiding the attracting pole surface of a moving magnet; the upper end of the interlocking card (3) is connected to the bottom foot of the moving magnet (8) of the ascending contactor (1), and the lower end of the interlocking card (3) is overlapped on both sides of the attracting pole surface (6) of the moving magnet (8) of the descending contactor (2). 2. A contactor interlocking card type mechanical interlocking device according to claim 1, characterized in that the contactor model is a CJ12 contactor.