CN219370906U - Quick-breaking pyrotechnic device switch - Google Patents

Abstract

The utility model relates to the technical field of contactor switches, in particular to a rapid breaking pyrotechnic device switch, which comprises a shell, a ceramic cavity fixedly arranged in the shell and a direct current contactor cavity fixedly arranged in the ceramic cavity, wherein the ceramic cavity is formed by a ceramic body and a ceramic body; the top of the ceramic cavity is fixedly provided with a sealing sheet, and the direct current contactor cavity is arranged on the inner side of the sealing sheet; the inside fixed mounting of direct current contactor cavity has the ignitron, and the downside of ignitron is equipped with the piston of stopper in direct current contactor cavity, and the piston is located the sealing washer top. The contactor piston is arranged above the sealing piece, the energy generated when the ignition tube is triggered firstly acts on the movable piston, the piston has certain kinetic energy, and the movable energy can be completely converted into kinetic energy to be impacted to the push rod, so that the contactor is more sensitive to break when explosion occurs, the energy born by the inner wall of the cavity of the direct current contactor is lower, and the requirement on the cavity material strength of the direct current contactor is reduced.

Description

Quick-breaking pyrotechnic device switch

Technical Field

The utility model relates to the technical field of contactor switches, in particular to a fast-breaking pyrotechnic device switch.

Background

In the new energy industry, such as energy storage, charging piles, automobiles and the like, a high-voltage direct-current contactor is required to be used as a circuit switch, so that the correct input and output of the battery energy are ensured. In electrical circuits, high voltage dc contactors, hot melt fuses and pyrotechnic fuses are typically provided. The integrated contactor integrates the functions of a high-voltage direct-current contactor, a hot-melt fuse and a pyrotechnic device fuse into one device, so that a novel contactor with an intelligent control function is formed.

The principle of the integrated contactor is that the integrated contactor has the same function as a high-voltage direct current contactor in the normal use process of a battery, when a battery pack is short-circuited, collision (such as new energy automobile collision) and the like, a main loop in the high-voltage direct current contactor is broken by starting a pyrotechnic device in an integrated product through signals such as current, position and the like, so that the mechanical open circuit in the whole loop of the battery is realized, and the safety of the battery is ensured.

The pyrotechnic device switch is powered on through a coil, converts electric energy into mechanical energy, controls the opening and closing functions of the switch through the movement of a push rod mechanism, specifically triggers an ignition tube to generate explosive gas to generate energy, and acts on the contact part of the direct current contactor in a transmission mode to forcedly separate the contact under the electrified condition, so that the reliable disconnection of the contactor is ensured. Because the pyrotechnic device contains explosive gas, the processing and production process has higher requirements on environment and technology, and the high-voltage direct-current relay in the new energy industry is in a sealed state.

In the existing direct current contactor, the piston is arranged below the sealing ring (as shown in fig. 4), energy (gas) generated when the pyrotechnic device is triggered is uniformly released to the inner wall of the sealing ring, so that the force is dispersed, the energy obtained when the piston is low, the direct current contactor is difficult to break, the whole inner wall (the existing product is a plastic part generally) of the contactor is subjected to the energy of gas explosion, the strength of surrounding fixing parts needs to be enhanced, and otherwise potential safety hazards easily exist.

Disclosure of Invention

The utility model aims to solve the defects in the prior art and provides a fast-breaking pyrotechnic device switch.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a fast breaking pyrotechnic device switch comprises a shell, a ceramic cavity fixedly arranged in the shell and a direct current contactor cavity fixedly arranged in the ceramic cavity;

the top of the ceramic cavity is fixedly provided with a sealing sheet, and the direct current contactor cavity is arranged on the inner side of the sealing sheet;

the ignition device is characterized in that an ignition tube is fixedly arranged in the direct-current contactor cavity, an ignition device signal wire extending to the outside of the direct-current contactor cavity is arranged at the upper end of the ignition tube, a piston plugged in the direct-current contactor cavity is arranged at the lower side of the ignition tube, and the piston is located above the sealing piece.

Preferably, a direct current contactor hole is formed in the top of the ceramic cavity, and a sealing sheet is welded in the direct current contactor hole.

Preferably, the sealing sheet is annular.

Preferably, the lower edge of the piston is higher than the lower edge of the sealing plate.

The beneficial effects of the utility model are as follows:

1. the contactor piston is arranged above the sealing piece, energy generated when the ignition tube is triggered acts on the movable piston at first, the piston has certain kinetic energy, and the movable energy can be completely converted into kinetic energy to impact the pushing rod, so that the contactor is more sensitive to break when explosion occurs.

2. The energy generated during the ignition tube triggering acts on the movable piston at first, the energy born by the inner wall of the cavity of the direct current contactor is lower, and the requirement on the material strength of the cavity of the direct current contactor is reduced.

Drawings

FIG. 1 is a schematic three-dimensional schematic diagram of a rapidly breaking pyrotechnic device switch in accordance with the present utility model;

FIG. 2 is a schematic view of a rapidly breaking pyrotechnic device switch in a closed state;

FIG. 3 is a schematic view of a sectional structure of a cavity of a direct current contactor of a rapidly breaking pyrotechnic device switch in accordance with the present utility model;

fig. 4 is a schematic cross-sectional view of a contactor with a piston located on the underside of a sealing plate.

In the figure: 1-an upper housing; 2-a lower housing; 3-ceramic cavities; 4-static terminals; 5-direct current contactor cavity; 51-external threads; 6-ignition tube; 61-an ignition signal line; 7-a piston; 8-sealing sheets; 9-pushing the rod; 10-moving sheets; 11-loading a spring; 12-lower springs; 13-functional sheet; 14-sealing the metal shell; 15-coil rack; 16-enamelled wire; 17-a switching signal tap; 18-a push rod collar; 19-iron core; 20-drive mechanism.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1-3, a fast breaking pyrotechnic device switch includes a housing, a ceramic cavity 3 and a coil former 15 fixedly mounted inside the housing, a dc contactor cavity 5 fixedly mounted inside the ceramic cavity 3.

The shell includes upper housing 1 and lower shell 2, and ceramic cavity 3 installs inside upper housing 1, and coil former 15 installs inside lower shell 2, and one side of lower shell 2 is provided with switch signal extraction joint 17.

Two static terminal holes and a direct current contactor hole positioned between the two static terminal holes are formed in the top of the ceramic cavity 3, one static terminal 4 is welded in each of the two static terminal holes, the upper end of the static terminal 4 protrudes out of the shell, an annular sealing sheet 8 is welded in each direct current contactor hole, and the direct current contactor cavity 5 is arranged on the inner side of the sealing sheet 8.

The ignition tube 6 is fixedly installed in the direct-current contactor cavity 5, an ignition device signal wire 61 extending to the outside of the direct-current contactor cavity 5 is arranged at the upper end of the ignition tube 6, and a piston 7 plugged in the direct-current contactor cavity 5 is arranged at the lower side of the ignition tube 6.

The piston 7 is arranged above the sealing piece 8, the lower edge of the piston 7 is higher than the lower edge of the sealing piece 8, energy generated when the ignition tube 6 is triggered firstly acts on the movable piston 7, the piston 7 has certain kinetic energy, the piston 7 is a real object, and the movable energy can be completely converted into kinetic energy to impact the pushing rod 9, so that the contactor is more sensitive to break when explosion occurs, and the energy born by the inner wall of the cavity 5 of the direct current contactor is lower.

The outside of coil former 15 is provided with enameled wire 16, and the outside of enameled wire 16 is provided with actuating mechanism 20, and the inboard fixedly connected with of coil former 15 seals metal casing 14, and the inside of sealing metal casing 14 is along its length direction sliding fit has iron core 19, fixedly connected with push rod 9 that the top extends to the piston 7 side on the iron core 19, the top fixedly connected with of push rod 9 and the moving plate 10 that matches of quiet terminal 4.

The bottom fixedly connected with function piece 13 of pottery cavity 3, the middle part fixedly connected with push rod lantern ring 18 of function piece 13, push rod 9 along length direction sliding fit in push rod lantern ring 18 inside. The upper spring 11 is sleeved outside the upper end of the push rod 9, the upper spring 11 is positioned between the moving plate 10 and the push rod lantern ring 18, the upper end of the push rod is fixed or propped against the moving plate 10, and the lower end of the push rod is fixed or propped against the push rod lantern ring 18.

The lower spring 12 is sleeved outside the lower end of the push rod 9, the lower spring 12 is positioned between the functional sheet 13 and the iron core 19, and the upper end of the lower spring is fixed on the functional sheet 13.

When the coil is electrified, the coil generates an electromagnetic field, and the electromagnetic field is absorbed and magnetized by the iron core 19, and the iron core 19 moves upwards, so that the static terminal 4 and the moving plate 10 are closed. If the coil is powered down, the iron core 19 is reset under the action of the spring, so that the switch is controlled to be opened and closed.

When an abnormal working condition is met, the ignition tube 6 is triggered to start the pyrotechnic device, and the explosive gas pushes the piston 7, so that the pushing rod 9 is pushed, the stop structure on the functional sheet 13 is broken, and the purpose of large gap is achieved.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims (4)

1. The quick-breaking pyrotechnic device switch is characterized by comprising a shell, a ceramic cavity (3) fixedly arranged in the shell and a direct-current contactor cavity (5) fixedly arranged in the ceramic cavity (3);

the top of the ceramic cavity (3) is fixedly provided with a sealing sheet (8), and the direct current contactor cavity (5) is arranged at the inner side of the sealing sheet (8);

the ignition device is characterized in that an ignition tube (6) is fixedly arranged in the direct-current contactor cavity (5), an ignition device signal line (61) extending to the outside of the direct-current contactor cavity (5) is arranged at the upper end of the ignition tube (6), a piston (7) plugged in the direct-current contactor cavity (5) is arranged at the lower side of the ignition tube (6), and the piston (7) is located above the sealing piece (8).

2. A rapid breaking pyrotechnic device switch according to claim 1, characterized in that the top of the ceramic cavity (3) is provided with a direct current contactor hole in which a sealing piece (8) is welded.

3. A quick-breaking pyrotechnic switch according to claim 1, characterized in that the sealing plate (8) is annular.

4. A quick-breaking pyrotechnic switch according to claim 1, characterized in that the lower edge of the piston (7) is higher than the lower edge of the sealing plate (8).