CN219370908U - Firework device switch for fixed point fire tube - Google Patents

Abstract

The utility model relates to the technical field of contactor switches, in particular to a pyrotechnic device switch with a fixed point fire tube, which comprises an upper shell, a lower shell, an ignition tube arranged at the top of the upper shell and a coil arranged in the lower shell, wherein the upper shell and the lower shell are fixedly connected; the top of the ignitron is fixedly connected with an ignitron safety ring, and the outer side of the ignitron safety ring is provided with an ignitron fixing flange for fastening the ignitron and the upper shell; the squib fixed flange comprises a flange ring positioned at the outer side of the squib safety ring, a flange plate is fixed at the lower side of the flange ring, an inclined plane matched with the inclination of the outer side of the squib is arranged at the inner side of the flange plate, and the inclined plane abuts against the outer wall of the squib. Through the fixed ignition tube of flange of taking the inclination, can increase the area that ignition tube mounting flange and ignition tube are fixed, reduce the power that ignition tube unit area needs to bear promptly for after the explosion takes place, the position of ignition tube is difficult for changing, more effectively with the power transmission that pyrotechnic device produced to push rod mechanism inside.

Description

Firework device switch for fixed point fire tube

Technical Field

The utility model relates to the technical field of contactor switches, in particular to a pyrotechnic device switch with a fixed-point fire tube.

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 ignition tube is an important element of the pyrotechnic device, and the switch of the pyrotechnic device triggers the ignition tube to generate explosive gas to generate energy, and the energy acts on the contact part of the direct current contactor in a transmission mode to forcedly separate the contact under the condition of electrification. Thereby ensuring reliable opening of the contactor. The explosive gas pushes away the charged dc contactor, which must also withstand the same force in the opposite direction. In order to ensure the insulation safety and structural requirements of the direct current contactor (electrified components), the shell is generally made of plastic components.

In the prior art, the squib is generally directly installed inside the shell, and the squib is easily subjected to position change due to unstable fixation, so that the force generated by the pyrotechnic device cannot be transmitted to the inside of the direct current contactor, and the direct current contactor is in failure.

Disclosure of Invention

The utility model aims to solve the defects in the prior art and provides a pyrotechnic device switch with a fixed-point fire tube.

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

a pyrotechnic device switch of a fixed point fire tube comprises an upper shell, a lower shell, an ignition tube and a coil, wherein the upper shell and the lower shell are fixedly connected;

an iron core which is movably matched with the coil is arranged on the inner side of the coil, a push rod mechanism is fixedly connected to the iron core, a functional sheet which is fixed with the upper shell is arranged at the bottom of the upper shell, and a lining part of the push rod mechanism is fixedly connected with the functional sheet;

a piston is arranged on the upper side of the push rod mechanism, and a sealing piece is arranged between the piston and the ignition tube;

the top of the ignition tube is fixedly connected with an ignition tube safety ring, and the outer side of the ignition tube safety ring is provided with an ignition tube fixing flange for fastening the ignition tube and the upper shell;

the ignition tube fixing flange comprises a flange ring positioned on the outer side of the ignition tube safety ring, a flange plate is fixed on the lower side of the flange ring, an inclined plane matched with the inclination of the outer side of the ignition tube is arranged on the inner side of the flange plate, the inclined plane abuts against the outer wall of the ignition tube, and the flange plate is fastened with the upper shell through a fixing bolt.

Preferably, the lower section of the squib is disposed inside the upper housing with its upper end extending outside the upper housing.

Preferably, a shell connecting part is arranged at the upper part of the upper shell, a pin block is arranged at the outer side of the flange ring, a pin block groove matched with the pin block is formed in the shell connecting part, and the pin block is embedded into the corresponding pin block groove.

Preferably, the longitudinal section of the pin block is triangular with a wide upper part and a narrow lower part.

The beneficial effects of the utility model are as follows:

1. through the fixed squib of flange of taking the inclination, can increase the fixed area of squib fixed flange and squib, reduce the power that the unit area of squib needs to bear promptly to reduce the destructive power that the squib produced on the inclined plane direction, make the explosion take place the back, the position of squib be difficult for changing, more effectively with the power transmission that pyrotechnic device produced to push rod mechanism inside.

2. The triangle pin block is arranged on the outer side of the flange and is tightly connected with the connecting part of the shell, so that the stability of the flange can be improved, and the stability of the ignition tube is further improved.

Drawings

FIG. 1 is a schematic three-dimensional view of a pyrotechnic device switch for a fixed-point fire tube in accordance with the present utility model;

FIG. 2 is a schematic A-A cross-sectional view of a pyrotechnic device switch for a fixed-point fire tube in accordance with the present utility model;

FIG. 3 is a schematic cross-sectional view of squib mounting flange A-A of a pyrotechnic device switch for securing a squib in accordance with the present utility model;

FIG. 4 is a schematic view of a cross-section of a squib mounting flange B-B of a pyrotechnic device switch for securing a squib in accordance with the present utility model;

fig. 5 is a force analysis diagram of a squib fixing flange of a pyrotechnic device switch for fixing a squib according to the present utility model.

In the figure: 1-an upper housing; 2-a lower housing; 3-coil; 4-iron core; 5-a push rod mechanism; 6-functional sheet; 7-ignition tube; 8-a squib safety ring; 9-a squib fixing flange; 91-a flange ring; 92-pin blocks; 93-flange plate; 94-inclined plane; 95-fixing bolts; 10-sealing sheets; 11-a piston; 12-a housing connection; 121-pin block slots.

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 to 4, a pyrotechnic device switch of a fixed point fire tube includes an upper case 1 and a lower case 2 fixedly connected, a squib 7 installed at the top of the upper case 1, a coil 3 installed inside the lower case 2;

the inside of coil 3 is provided with iron core 4 in movable fit wherein, fixedly connected with push rod mechanism 5 on the iron core 4, and the bottom of going up shell 1 is provided with rather than fixed function piece 6, and the bush part and the function piece 6 fixed connection of push rod mechanism 5.

A piston 11 is provided on the upper side of the push rod mechanism 5, and a sealing piece 10 is provided between the piston 11 and the squib 7.

The lower section of the squib 7 is arranged inside the upper shell 1, the upper end of the lower section extends to the outer side of the upper shell 1, the top of the squib 7 is fixedly connected with a squib safety ring 8, and the outer side of the squib safety ring 8 is provided with a squib fixing flange 9 for fastening the squib 7 and the upper shell 1.

The squib fixing flange 9 comprises a flange ring 91 positioned at the outer side of the squib safety ring 8, a flange plate 93 is fixed at the lower side of the flange ring 91, an inclined surface 94 matched with the inclination of the outer side of the squib 7 is arranged at the inner side of the flange plate 93, the inclined surface 94 is propped against the outer wall of the squib 7, and the flange plate 93 is fastened with the upper shell 1 through a fixing bolt 95.

As shown in fig. 5, the area where the squib fixing flange 9 and the squib 7 are fixed can be increased by fixing the squib 7 through the inclined surface 94, namely, the force required to bear per unit area of the squib 7 is reduced, and the destructive force generated by the squib 7 in the direction of the inclined surface 94 is reduced, so that the position of the squib 7 is not easy to change after explosion occurs, and the force generated by a pyrotechnic device is more effectively transmitted to the inside of the push rod mechanism 5.

The upper portion of the upper shell 1 is provided with a shell connecting portion 12, the outer side of the flange ring 91 is provided with a pin block 92, the longitudinal section of the pin block 92 is in a triangle shape with a wide upper part and a narrow lower part, a pin block groove 121 matched with the pin block 92 is formed in the shell connecting portion 12, and the pin block 92 is embedded into the corresponding pin block groove 121, so that the squib fixing flange 9 and the shell connecting portion 12 are fixed.

When the coil 3 is electrified, the coil 3 generates an electromagnetic field, the electromagnetic field is absorbed and magnetized by the iron core 4, and the iron core 4 moves upwards, so that a moving plate and a static terminal on the push rod mechanism 5 are closed. If the coil 3 is powered down, the iron core 4 is reset and separated from the static terminal, so that the switch is controlled to be opened and closed.

When an abnormal working condition is met, the ignition tube 7 is triggered to start the pyrotechnic device, the explosive gas pushes the piston 11, so that the push rod mechanism 5 is pushed, the stop structure on the functional sheet 6 falls off, and the moving sheet and the static terminal on the push rod mechanism 5 are in a large clearance state.

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 pyrotechnic device switch of the fixed point firetube is characterized by comprising an upper shell (1) and a lower shell (2) which are fixedly connected, an ignition tube (7) arranged at the top of the upper shell (1) and a coil (3) arranged in the lower shell (2);

an iron core (4) which is movably matched with the coil (3) is arranged at the inner side of the coil (3), a push rod mechanism (5) is fixedly connected to the iron core (4), a functional sheet (6) which is fixed with the upper shell (1) is arranged at the bottom of the upper shell, and a lining part of the push rod mechanism (5) is fixedly connected with the functional sheet (6);

a piston (11) is arranged on the upper side of the push rod mechanism (5), and a sealing sheet (10) is arranged between the piston (11) and the ignition tube (7);

the top of the ignition tube (7) is fixedly connected with an ignition tube safety ring (8), and the outer side of the ignition tube safety ring (8) is provided with an ignition tube fixing flange (9) for fastening the ignition tube (7) and the upper shell (1);

the utility model provides a fire tube mounting flange (9) is including being located the flange ring (91) in the fire tube safety ring (8) outside, the downside of flange ring (91) is fixed with flange board (93), the inboard of flange board (93) is provided with inclined plane (94) that match with the inclination in the outside of fire tube (7), and inclined plane (94) support and push up on the outer wall of fire tube (7), flange board (93) with go up shell (1) and pass through fixing bolt (95) fastening.

2. A pyrotechnic device switch of a fixed point fire tube according to claim 1, characterized in that the lower section of the squib (7) is placed inside the upper housing (1) with its upper end extending outside the upper housing (1).

3. The pyrotechnic device switch of a fixed point fire tube according to claim 1, characterized in that the upper part of the upper housing (1) is provided with a housing connection part (12), the outer side of the flange ring (91) is provided with a pin block (92), the housing connection part (12) is provided with a pin block groove (121) matched with the pin block (92), and the pin block (92) is embedded in the corresponding pin block groove (121).

4. A pyrotechnic device switch for a fixed point fire tube according to claim 3, characterized in that the longitudinal section of the pin block (92) is triangular with a wider upper and a narrower lower.