CN206179814U - Power surge protector trip gear - Google Patents

Abstract

The utility model relates to a tripping device for a power surge protector, which includes a box body, a buckle structure and a dislocation mechanism arranged in the box body; the buckle structure includes electrodes arranged in the box body and a swing rod supported by the dislocation mechanism; It is welded with the pendulum bar to form a joint joint, and constitutes the electrical connection between the electrode and the pendulum bar; when the current passing through exceeds the limit value, the joint joint is heated and melted, and the dislocation mechanism pushes the pendulum bar to move toward the outside of the dislocation mechanism. The electrodes are separate from the pendulum. The utility model is provided with a buckle structure and a dislocation mechanism. When the power surge is too large for thermal protection, the welding spot of the buckle is heated and melted, and the dislocation mechanism pushes the swing bar to move toward the outside of the dislocation mechanism. Open, to solve the problem of automatic tripping due to elastic force before tripping, tripping visual and remote signal alarm, insulation isolation arc extinguishing, tripping and arc extinguishing in a narrow and low space, simple structure, easy to install Convenient and low cost.

Description

Power Surge Protector Trip Device

technical field

The utility model relates to the technical field of surge protectors, in particular to a tripping device for power surge protectors.

Background technique

The power surge protector, also known as the power surge protector, is suitable for low-voltage power supply systems of various voltage levels (including DC1500V), and protects against indirect lightning and direct lightning effects or other instantaneous overvoltage surges. It is suitable for photovoltaic systems. Requirements for surge protection in family residences, tertiary industries, and industrial fields, with protection modes such as positive-to-ground, negative-to-ground, phase-to-phase, phase-to-ground, neutral-to-neutral, neutral-to-ground and combinations thereof.

As shown in Figure 1, the thermal tripping structure of power surge protectors currently on the market adopts the structure of swing rod + extension spring or slider + spring. The structure of the swing rod + tension spring, the tension spring has a large elasticity, which is easy to be automatically tripped by the welding effect and the elastic force, making the device invalid; the lower end of the swing rod structure is a remote signal activation structure, and the remote signal activation structure is arranged in an arc shape , It is a line contact, which can easily cause poor contact and cause remote signaling to fail. The structure of the slider + spring cannot solve the problem of melting of the spacer caused by the high temperature of the arc after tripping.

Therefore, it is necessary to design the tripping device of the power surge protector to solve the problem of automatic tripping due to elastic force before tripping, completely cut off the arc, realize tripping visual and remote signaling alarm, and insulation isolation arc extinguishing.

Utility model content

The purpose of the utility model is to overcome the defects of the prior art and provide a tripping device for a power surge protector.

In order to achieve the above purpose, the utility model adopts the following technical solutions: the tripping device of the power surge protector includes a box body, and a buckle structure and a dislocation mechanism arranged in the box body; the buckle structure includes a The electrode and the pendulum supported by the dislocation mechanism; the electrode and the pendulum are welded to form a joint welding spot, and constitute the electrical connection between the electrode and the pendulum; when the current passing through exceeds the limit value, the joint welding The point is heated and melted, and the dislocation mechanism pushes the pendulum to move toward the outside of the dislocation mechanism, and the electrode is separated from the pendulum.

Its further technical solution is: the dislocation mechanism includes a push rod and a dislocation elastic member, the dislocation elastic member is located between the push rod and the side end of the box body, and the lower end of the swing rod is connected to the push rod Abut.

Its further technical solution is: the dislocation mechanism further includes a torsion spring, and the torsion spring is connected to the lower end of the swing rod.

Its further technical solution is: the dislocation elastic member is a spring.

Its further technical solution is: the lower end of the box body is provided with a pin, the upper end of the pin extends upwards into the box body, and the lower end of the swing rod is connected to the pin through a connecting piece.

Its further technical solution is: the connecting piece is an elastic connecting piece.

Compared with the prior art, the utility model has the beneficial effects that: the tripping device of the power surge protector of the utility model, by setting the buckle structure and the dislocation mechanism, when the power surge is too large for thermal protection, the buckle welding spot When heated and melted, the dislocation mechanism pushes the pendulum to move towards the outside of the dislocation mechanism, and the electrodes and the pendulum are separated from all directions, which solves the problem of automatic tripping due to elastic force before tripping, visual tripping and remote signal alarm As well as insulation and isolation arc extinguishing, tripping and arc extinguishing can be realized in a narrower and lower space, with good functional stability, simple structure, convenient installation and low cost.

Below in conjunction with accompanying drawing and specific embodiment the utility model is described further.

Description of drawings

FIG. 1 is a three-dimensional structure diagram of a thermal tripping structure of an existing power surge protector.

Fig. 2 is a three-dimensional structural schematic diagram of a power surge protector tripping device provided by a specific embodiment of the present invention;

Fig. 3 is a three-dimensional structural schematic diagram of the tripping device of the power surge protector provided by the specific embodiment of the utility model (before the box body is removed and the solder joint of the joint is heated and fused);

Fig. 4 is a three-dimensional schematic diagram of the tripping device of the power surge protector provided by the specific embodiment of the utility model (after the box body is removed and the solder joint of the buckle is heated and fused).

reference sign

10 Swing lever 11 Stop

20 Push rod 30 Connector

40 Torsion Spring 50 Pins

60 Misalignment spring 70 Fixed shell

80 boxes 90 electrodes

detailed description

In order to fully understand the technical content of the utility model, the technical solutions of the utility model will be further introduced and illustrated below in conjunction with specific examples, but not limited thereto.

The specific embodiments shown in Figures 2 to 4, the power surge protector tripping device provided in this embodiment can be used in the process of safe operation protection of SPDs in low-voltage (including DC1500V) power supply systems of various voltage levels , to avoid short-circuit accidents caused by voltage difference and arc discharge between the two electrodes 90 when the SPD in the power supply system is running off the mouth, and fire accidents caused by overheating; the device can also be applied to SPDs in various AC and DC power supply systems In the process of tripping arc interruption, the problem of automatic tripping due to elastic force before tripping is solved, the arc is completely cut off, and visual tripping and remote signal alarm are realized, as well as insulation isolation and arc extinguishing.

The power surge protector tripping device includes a box body 80, and a buckle structure dislocation mechanism located in the box body 80; the buckle structure includes an electrode 90 arranged in the box body 80 and a pendulum supported by the dislocation mechanism Rod 10; the electrode 90 is welded with the pendulum 10 to form a joint welding point, and constitutes an electrical connection between the electrode 90 and the pendulum 10; when the current passing through exceeds a limit value, the joint joint is heated and melted , the dislocation mechanism pushes the swing rod 10 to move toward the outside of the dislocation mechanism, and the electrode 90 is separated from the swing rod 10 .

The tripping device of the above-mentioned power surge protector, by setting the buckle structure and the dislocation mechanism, when the power surge is too large for thermal protection, the welding spot of the buckle is heated and melted, and the dislocation mechanism pushes the swing rod 10 to move toward the outside of the dislocation mechanism , the electrode 90 and the swing rod 10 are separated from all directions, which solves the problem of automatic tripping due to elastic force before tripping, visual tripping and remote signal alarm, insulation isolation and arc extinguishing, and can be used in a narrower and lower Tripping arc extinguishing is realized in the space, the function is stable, the structure is simple, the installation is convenient, and the cost is low.

Furthermore, the upper end of the swing rod 10 is provided with a stopper 11 extending outward.

In addition, the dislocation mechanism includes a push rod 20 and a dislocation elastic member 60, the dislocation elastic member 60 is located between the push rod 20 and the side end of the box body 80, the lower end of the swing rod 10 abuts against the push rod 20, When the buckle welding spot is heated and melted, the dislocation elastic member 60 is compressed.

In addition, the dislocation mechanism further includes a torsion spring 40 connected to the lower end of the swing rod 10 , and simultaneously drives the swing rod 10 to laterally deviate from the electrode 90 through the push rod 20 and the torsion spring 40 .

In this embodiment, the above-mentioned dislocation elastic member 60 is a spring.

In other embodiments, the above-mentioned dislocation elastic member 60 is an elastic piece.

Further, the two ends of the dislocation elastic member 60 are respectively provided with baffles, the push rod 20 is connected with a fixed shell 70, and a sliding plate is arranged inside the fixed shell 70, and the sliding plate is located on the side of the baffle. At the outer end, when the dislocation elastic member 60 moves, it drives the push rod 20 and the fixed shell 70 to move together.

The lower end of the box body 80 is provided with a pin 50 , and the upper end of the pin 50 extends upward into the box body 80 , and the lower end of the swing rod 10 is connected to the pin 50 through the connecting piece 30 .

In this embodiment, the connector 30 is a soft connector. The flexible connector can avoid the problem of deformation of the push rod 20, the pin 50 and the swing rod 10 when the lightning surge strikes. Separated from the pendulum 10, the arc is well extinguished.

In addition, the soft connecting piece is a braid made of annealed copper, which is welded together with the torsion spring 40 .

In this embodiment, the electrode 90 is welded with the pendulum rod 10 acting on the side thrust to form an electrical connection circuit of the buckle. When the current of the electrical connection circuit exceeds a set value, the joint welding spot of the electrode 90 and the pendulum rod 10 is heated and fused, The pendulum 10 is laterally deviated from the electrode 90 by the side thrust, and the pendulum 10 is separated from the electrode 90, and the pin 50 moves down simultaneously to realize the output of the remote signal alarm.

The above only uses examples to further illustrate the technical content of the utility model, so that readers can understand it more easily, but it does not mean that the implementation of the utility model is limited to this, and any technical extension or re-creation done according to the utility model shall be Protected by the utility model. The scope of protection of the utility model shall be determined by the claims.

Claims (6)

1. The power surge protector tripping device is characterized in that it includes a box body, a buckle structure and a dislocation mechanism located in the box body; Swing bar; the electrode and the swing bar are welded to form a joint joint, and constitute an electrical connection between the electrode and the pendulum; when the current passing through exceeds a limit value, the joint joint is heated and melted, and the dislocation The mechanism pushes the swing rod to move toward the outside of the dislocation mechanism, and the electrode is separated from the swing rod. 2. The tripping device for a power surge protector according to claim 1, wherein the dislocation mechanism includes a push rod and a dislocation elastic member, and the dislocation elastic member is located between the push rod and the box body. Between the side ends, the lower end of the swing rod abuts against the push rod. 3. The tripping device for power surge protector according to claim 2, characterized in that, the dislocation mechanism further comprises a torsion spring, and the torsion spring is connected to the lower end of the swing rod. 4. The tripping device for a power surge protector according to claim 2, wherein the dislocation elastic member is a spring. 5. The power surge protector tripping device according to any one of claims 2 to 4, characterized in that, the lower end of the box body is provided with pins, and the upper ends of the pins extend upwards into the box body , the lower end of the swing rod is connected to the pin through a connecting piece. 6. The tripping device for a power surge protector according to claim 5, wherein the connecting piece is a soft connecting piece.