WO2020043331A1

WO2020043331A1 - Miniaturized horn spark gap with integrated deion chamber

Info

Publication number: WO2020043331A1
Application number: PCT/EP2019/063031
Authority: WO
Inventors: Bernhard Krauss; Stephan Hierl; Roland Eichenseer
Original assignee: Dehn Se + Co Kg
Priority date: 2018-08-29
Filing date: 2019-05-21
Publication date: 2020-03-05
Also published as: DE102018121138B3; EP3673548B1; CN111602304A; SI3673548T1; EP3673548A1

Abstract

The invention relates to a miniaturized horn spark gap with an integrated deion chamber, consisting of a multi-part insulating-material housing as a supporting and receiving body for the horn electrodes and the deion chamber, wherein the horn electrodes have an asymmetrical form, with one long electrode and one shorter electrode. The deion chamber is formed as a deion chamber part which can be inserted into the supporting and receiving body, receives a multiplicity of quenching plates and has through-passages. According to the invention, the horn electrodes are provided with a metal backing, at least in the region that is passed over by an arc produced, wherein the shorter electrode is formed as a hooked horn electrode, reaching up to the deion chamber part, and, at a distance from and on the upper side of the through-passages, the latter are at least partially covered over by a metal baffle wall, wherein the baffle wall can at the same time be connected to the insulating-material housing, mechanically strengthening it.

Description

Miniaturized horn spark gap with integrated deion chamber

description

The invention is based on a miniaturized horn spark gap with an integrated deion chamber, consisting of a multi-part insulating material housing as a support and receiving body for the horn electrodes and the deion chamber, the horn electrodes having an asymmetrical shape with a longer and a shorter electrode, the horn electrodes in Ignition area run almost parallel and then diverge, furthermore a deion chamber part which can be inserted into the support and receiving body and which accommodates a large number of extinguishing plates and has through-channels is formed as a deion chamber according to the preamble of claim 1.

DE 10 2013 112 400 Al describes an arc quenching chamber for

Surge arrester with a variety of deionizing quenching plates or quenching plates previously known. The quenching plates are spaced apart in such a way that a multiplicity of channels for receiving gases caused by arcing is formed.

The quenching plates have a slot-shaped inlet area. Furthermore, a gas outflow area is formed through lateral and / or end openings between the extinguishing plates. Starting from the axis of symmetry of the arc quenching chamber, the gas outflow areas are between

neighboring pairs of quenching plates alternately lead to one or the other chamber side or chamber half. In this regard, separators are provided, with the partial gas streams in particular being mixed only in a common relaxation space and subjecting them to a union there.

Such a deion chamber has a small size and can be used for increased operating voltages.

The horn spark gap with deion chamber according to DE 10 2011 102 257 B4 is of a non-blowing design with a multi-part Insulated housing as a support and receptacle for the horn electrodes and the deion chamber. Means for guiding the gas flow caused by the arc are also present. The insulating material housing is divided in the plane spanned by the horn electrodes and forms a first and second half-shell.

In the arc running area between the electrodes in the direction of the deion chamber, there is a plate-shaped insulating material disc and delimits this area. The insulating material is used in a corresponding shape in the respective half-shell. There is also the option of designing the insulating material plate with a ferromagnetic deposit to control the arc running.

In the generic horn spark gap with deion chamber according to DE 10 2011 123 020 B3, a multi-part insulating material housing is also provided as a support and receiving body for horn electrodes and the deion chamber. There are also means for guiding the arcing

Gas flow present. There, too, the insulating material housing is divided in the plane spanned by the horn electrodes and forms a first and a second half-shell.

The horn electrodes have an asymmetrical shape with a longer and a shorter electrode. In the ignition area, both electrodes run almost parallel or with little divergence.

The arc running area between the electrodes in the direction of the deion chamber is delimited by a plate-shaped insulating material which is inserted in a form-fitting manner in a first shape of the respective half-shell.

Furthermore, the first forms take a ferromagnetic

Deposit of the arc running area, the plate-shaped insulating material electrically separating the respective deposit from the electrodes.

The half-shells have further, second formations, which one

Insert the deion chamber part in a form-fitting manner. There are openings or openings in each of the first and second formations respective half-shell located. The shorter of the electrodes ends in front of the deion chamber part, so that the gas flow only partially enters the deion chamber.

Such a horn spark gap can form a universal module with external connection terminals for the electrodes, which can be integrated into a plug-in part or an outer housing, depending on the customer's requirements.

Although the horn spark gaps according to the prior art described above have excellent electrical properties and are highly reliable, there is a need for the installation space

for corresponding spark gaps to minimize, in particular in

Low voltage supply systems or corresponding devices to allow their miniaturization. Due to the currents and voltages to be controlled, it is fundamentally very problematic to scale known spark gaps.

From the foregoing, it is an object of the invention to provide a further developed, miniaturized horn spark gap with an integrated deion chamber, which is particularly small in size and yet has the required electrical properties and the necessary mechanical stability in order to meet the requirements of the user, also in terms of long-term stability of the products to ensure.

The object of the invention is achieved by a miniaturized horn spark gap with an integrated deion chamber according to the combination of features according to claim 1, the subclaims at least

include expedient refinements and developments.

It is assumed that a horn spark gap with an integrated deion chamber.

The horn spark gap consists of a multi-part, in particular two-part, insulating material housing. The insulating housing provides a support and receiving body for the horn electrodes and the

Deion chamber. The horn electrodes preferably have an asymmetrical shape with a longer and a shorter electrode.

The horn electrodes run almost parallel in the ignition area or diverge minimally. Then the distance increases

Horn electrodes in the sense of increasing divergence.

Furthermore, the deion chamber is designed as a deion chamber part which can be inserted into the support and receiving body and is held by the latter and which accommodates a large number of extinguishing plates and has through-channels for an arc-induced gas flow.

According to the invention, the horn electrodes are equipped with a metallic deposit at least in the running area of an arc that arises.

This metallic deposit initially leads to a mechanical one

Reinforcement of the otherwise thin-walled executable

Horn electrode.

The reinforcement is fixed on the back of the horn electrode in question, so that the actual arc running area is not disturbed and the arc does not "hang".

The metallic deposit and reinforcement of the horn electrodes also leads to better cooling of arcs due to the greater heat capacity.

Furthermore, the shorter electrode is designed as a hook horn electrode extending to the deion chamber part. The gas flow which arises as a result of the ignition and burning of an arc is thus conducted into the deion chamber and the extinguishing plates and passageways present there.

Spaced and on the output side of the through channels, this is at least partially covered by a metallic baffle, the baffle simultaneously with the insulating material housing, which mechanically reinforces it. is connectable. An example of a connection is a force-locking riveting or screwing.

The baffle serves on the one hand for the mechanical reinforcement of the

overall arrangement described.

On the other hand, the baffle serves to reflect pressure or gas flow. The aim is to stop the arc at the resulting narrow point

Forcing to stay.

The baffle also serves to cool the resulting gases.

Overall, the load on the insulating housing or a surrounding outer housing is reduced by the combination of features described above.

The baffle wall can have a closed, a slotted or a gas flow reflection surface provided with flow-guiding slot embossing.

This measure can influence the pressure reflection and the

Direction of gas flow can be influenced in a targeted manner.

As already mentioned, the horn electrodes are both led up to the deion chamber part and the metallic deposit is designed as a reinforcement on the back by means of an insert part.

Both the material of the electrodes and that of the metallic backing can consist of galvanically tinned copper.

In the area of the hook horn electrode facing away from the arc combustion chamber, in the free space partially enclosed by the hook horn, there is one

Embodiment of the invention, a flexible circuit board, in particular

Foil circuit board, arranged to trigger the spark gap.

The flexible or foil circuit board can accommodate an electrical or electronic component that is immersed in the free space. In this way, the volume available in the free space is optimally used for the purpose of miniaturizing the spark gap as required. The electrical component mentioned can be a gas arrester which is in electrical connection with a corresponding conductor section of the circuit board.

In one embodiment of the invention, an ignition aid, which consists of a conductive plastic, preferably black POM, extends into the ignition area of the horn electrodes.

The baffle is preferably designed as a stamped and bent part and has two bends, which openings for receiving non-positive

Has lanyards. The breakthroughs are complementary to

Cut-outs in the multi-part insulating material housing. If the non-positive connection is realized by means of metallic rivets, the heat dissipation and cooling effect improve due to the formed

Heat sink.

The horn electrodes are each guided through one of their ends through an opening in the insulating material housing in order to enable direct electrical contact. There is no need for separate connection means which are to be contacted with the electrodes first.

In a preferred embodiment, the insulating material housing has at least one elevation or one projection on one of its inner sides. This elevation or the lead serve to form a

electrical pressure contact between the flexible printed circuit board and the adjacent hook horn electrode.

In one embodiment of the invention, the miniaturized horn spark gap created has essentially outer dimensions of

25 x 10 x 17 mm (L x W x H).

The invention will be explained in more detail below using an exemplary embodiment and with the aid of figures.

1 shows an exploded view of the miniaturized horn spark gap with an integrated deion chamber; Fig. 2 is a detailed representation of the deion chamber, designed as

Deion chamber part with absorbed fire-extinguishing sheets;

Fig. 3 shows a detailed view of the film circuit board, designed as

Trigger circuit board with integrated gas arrester on the circuit board;

Fig. 4 shows a first embodiment of the baffle with the closed

Impact surface once as a cut (lower figure part) and on the other hand with angled sides (upper figure part);

Fig. 5 shows another embodiment of the baffle in slotted

Shape, both as a cut (lower figure part) and as a result of the bending of the side edges (upper figure part);

FIG. 6 shows a further embodiment of a baffle with slot embossing for deflecting the gas flow with the side edges being bent; FIG. and

7 shows a representation of the miniaturized horn spark gap

For reasons of clarity, the front part of the insulating material housing has been left out and the deposits and the baffle wall have been pulled out for clarity.

The miniaturized horn spark gap according to the invention

the figures, in particular according to Figure 1, is based on a multi-part

Insulated housing. The insulating material housing comprises an upper part 1 and a lower part 2.

The corresponding housing parts are equipped on the inside with structures for receiving, ie for mechanically fixing, the other functionally relevant components.

In one embodiment of the invention, in addition to the respective insulating housing part 1; 2 a metallic concentrator 3; 4 used. For electrical insulation between the respective concentrator 3; 4 an insulating plate 5; 6, in particular consisting of volcanic fiber, arranged. The corresponding insulating plate 5; 6 ensures the necessary electrical separation from the respective concentrator 3; 4th

The housing parts 1; 2 continue to take a Deionkammerteil 7.

This deion chamber part 7 consists of a plastic carrier with through channels and slots, the latter corresponding extinguishing plates 8

take up.

The horn electrodes can also be used in the housing parts. On the one hand, there is a hook horn electrode 9 as the shorter electrode and a long horn electrode 10 as the longer of the electrodes.

Both the hook horn electrode 9 and the long horn electrode 10 are interposed by metal 11; 12 reinforced.

For the purpose of triggering the horn spark gap, a trigger circuit board 13 is used (see also the detailed illustration according to FIG. 3).

This trigger circuit board 13, which is designed in particular as a film circuit board, is in electrical connection with an S-POM board 14, which projects into the ignition area between the horn electrodes.

Furthermore, the trigger circuit board 13 has a contact surface 15 and, in a special embodiment, a gas arrester 16.

Ultimately, an impact plate 17 (see also FIGS. 4 to 6) is present.

The baffle plate is spaced and arranged on the output side of the through channels of the deion chamber part 7, at least partially covering them, the baffle wall 17 being connectable to the insulating material housing at the same time in a mechanically reinforcing manner, as can be seen in FIG. 7 by a person skilled in the art.

The connection of the housing parts 1; 2 and fixing the baffle

or baffle plate 17 happens for example with tubular rivets 18 through corresponding recesses in the housing parts 1; 2 and breakthroughs in the baffle 17 are performed.

The baffle 17 forms a closed, depending on the embodiment,

slotted or flow-embossed gas flow reflection surface.

In this regard, attention should be drawn to the representations according to FIGS. 4 to 6.

In the embodiment according to FIG. 4, a baffle wall 171 with an essentially closed gas flow reflection surface is assumed.

The baffle 172 according to FIG. 5 has slot-shaped openings.

In the baffle 173 according to FIG. 6, flow-guiding, embossed

Openings exist which lead to a deflection of the incident gas flow.

The baffles 17, 171, 172 and 173 in question are preferred as

Stamped-bent parts are formed and have two lateral bends or bends, which openings 20 complementary to recesses in the housing parts 1; 2 have. These openings 20 serve to accommodate example rivets 18 (see Figure 1); the baffles now not only lead to the cooling and conduction of gas flow, but also stabilize the design of the insulating material housing, allow the gas flow to be cooled by heat dissipation and prevent damage to adjacent components or to an outer housing (not shown in the figures).

With reference to FIG. 7, the carrier part 2 has an elevation X, which serves to establish a secure electrical connection between the trigger printed circuit board 13 and the contact area 15 there to the hook horn electrode 9.

FIG. 7 also shows how the trigger circuit board 13

is positioned and in what way the component 16 is immersed in the free space below the hook horn electrode 9. The horn electrodes 9; 10, as can be seen in FIG. 7, each with one end through an opening in the corresponding part of the insulating material housing 1; 2 out to enable a direct electrical connection. There is no need for separate connection elements.

Claims

claims

1. Miniaturized horn spark gap with integrated deion chamber, consisting of a multi-part insulating material housing (1; 2) as a support and receiving body for the horn electrodes (9; 10) and the deion chamber, the horn electrodes (9; 10) having an asymmetrical shape with a longer and have a shorter electrode, the horn electrodes run almost parallel in the ignition area and then diverge, continue as

Deion chamber an insertable in the support and receiving body

Deion chamber part (7) is formed, which receives a plurality of quenching plates (8) and has through channels,

characterized in that

the horn electrodes (9; 10) are equipped with a metallic backing (12) at least in the running area of an emerging arc, the shorter electrode (9) reaching as far as the deion chamber area

Hook horn electrode is formed and spaced and on the output side of the through channels of the deion chamber (7) these from a metallic

The baffle (17) is at least partially covered, the baffle (17) being connectable to the insulating material housing, which mechanically reinforces it.

2. Miniaturized horn spark gap according to claim 1,

characterized in that

the baffle (17) is a closed one (171), a slotted one (172) or a flow-guiding slot embossing (173)

Has gas flow reflection surface.

3. Miniaturized horn spark gap according to claim 1 or 2,

characterized in that

the horn electrodes (9; 10) are led to the deion chamber part (7) and the metallic deposit (11; 12) as a reinforcement on the back

Insert is formed.

4. Miniaturized horn spark gap according to one of the preceding claims,

characterized in that Flexible in the area of the hook horn electrode (9) facing away from the arc combustion chamber, in the free space partially enclosed by the hook horn

Printed circuit board (13) for triggering the spark gap is arranged, the flexible printed circuit board (13) receiving an electrical or electronic component (16) which is immersed in the free space.

5. Miniaturized horn spark gap according to claim 4,

characterized in that

the component (16) is a gas discharge tube.

6. Miniaturized horn spark gap according to one of the preceding claims,

characterized in that

An ignition aid (14) made of conductive plastic is immersed in the ignition area of the horn electrodes (9; 10).

7. Miniaturized horn spark gap according to one of the preceding claims,

characterized in that

the baffle (17) is designed as a stamped and bent part and has two bends, which openings (20) for receiving non-positively

Has connecting means (18), the openings (20) being complementary to recesses in the multi-part insulating material housing (1; 2).

8. Miniaturized horn spark gap according to one of the preceding claims,

characterized in that

the baffle (17) is designed as a heat sink.

9. Miniaturized horn spark gap according to one of the preceding claims,

characterized in that

the horn electrodes (9; 10) are each guided at one end through an opening in the insulating housing (1; 2) in order to make direct electrical contact possible.

10. Miniaturized horn spark gap according to one of claims 4 to 9, characterized in that

the inside of the insulating material housing (1; 2) has at least one

Has cant (X) or a projection to an electrical

Pressure contact between the foil circuit board (13) and the

To enable hook horn electrode (9).

11. Miniaturized horn spark gap according to one of the preceding claims,

characterized in that

this outer dimension has in the range of essentially 25 mm x 10 mm x 17 mm (length x height x width).