JPS6129160Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of an exhaust plug for a storage battery.

Conventionally, various exhaust plugs have been proposed that are designed to prevent liquid from overflowing from the exhaust hole during use.

However, as storage batteries for automobiles become so-called maintenance-free, the maximum liquid level may be raised higher than before in order to increase the effective liquid volume, and in such cases, conventional exhaust plugs are used to prevent overflow during use. There was a problem that the liquid could not be sufficiently blocked.

The object of the present invention is to provide a novel exhaust plug that solves the above-mentioned problems, and this will be explained below based on one embodiment.

First, to explain the drawings, 1 is an exhaust plug according to the present invention, 2 is a bowl-shaped upper conical body 3 having a concave portion on the upper surface, and an inverted bowl-shaped lower conical body 4 having a concave portion on the lower surface with respect to the vertical axis. A drip-proof block formed by integrally connecting a plurality of drip-proof pieces 5 extending radially, 6, 7
8 are gas vent and acid drip holes provided in the lower cone 4 of the upper cone 3 (in the illustrated embodiment, the positions of both holes on the plane are shifted by 90 degrees from each other);
Reference numeral 11 indicates a plug body having a side gas vent hole 9 located below the upper cone body 3 and an exhaust hole 10 provided above the upper cone body 3, and 11 indicates the upper cone body 3 and the exhaust hole. 12 is a gap between the inner wall of the plug 8 and the end face of the drip-proof piece 5 facing the inner wall, and 13 and 13' are the gaps between the two drip-proof pieces 5 and the plug. A cavity formed by the inner wall of the body 8 and the upper conical body 3 and the lower conical body 4 (the cavity 1 whose upper end is closed by the non-porous part of the upper conical body 3)
3 has a hole 7 for gas venting and acid dripping of the lower conical body 4, and a cavity 13' whose lower end is closed by the non-porous part of the lower conical body 4 is open for gas venting and acid dripping of the upper conical body 3. An acid droplet flow hole 6 is opened. ) 14 is a screw provided on the outer surface of the stopper 8 for screwing into the liquid port 16 of the storage battery lid 15, 17 is a gasket, and 18 is a space above the liquid level inside the storage battery. Note that the gas vent/acid drip hole 7 of the lower conical body 4 and the side gas vent hole 9 of the stopper 8 are both opened in the same cavity 13.

Next, the operation of the illustrated exhaust plug 1 will be explained as follows.

The acid mist-containing gas generated inside the storage battery first accumulates in the space 18 above the liquid level, but it immediately enters the cavity 13 through the side gas vent hole 9 of the plug body 8 and flows to the slope of the upper cone body 3. At this time, the acid mist in the gas turns into acid droplets, which flow down through the drip-proof piece 5 into the storage battery through the gas vent/acid drip hole 7 of the lower cone 4. The gas from which most of the acid mist has been removed as described above enters the cavity 13' through the gap 12, and then enters the gas vent/acid drip hole 6 of the upper cone 3 and the hole located above it. The gas passes through the microporous filter 11 and escapes from the exhaust hole 10 to the outside. At this time, even if a small amount of acid mist remains in the gas accumulated between the upper conical body 3 and the microporous filter 11, it will eventually fall as acid droplets and pass through the gas venting/acid droplet flow hole 7. and flows down into the storage battery.

In addition to the above, the lower conical body 4 has a gas venting/acid dripping hole 7, a cavity 13, a gap 12, and a cavity 13'.
There is also a gas escape route that passes through the gas vent/acid dripping hole 6 of the upper cone 3 and the microporous filter 11 to reach the exhaust hole 10, but in this case as well, the acid mist is effectively removed as in the above case. Only gas escapes to the outside through the exhaust hole 10.

Since the exhaust hole 1 according to the present invention is configured as described above, the gas containing acid mist that enters the inside of the plug body 2 from the side gas vent hole 9 which serves as a gas vent and acid droplet flow hole 7 is removed as described above. The acid mist is effectively removed while following the complicated path with many twists and turns.

Furthermore, even if the electrolytic solution were to enter the cavity 13, further progress would be prevented by the upper cone 3 and drip-proof piece 5 that close the upper end of the cavity 13. , most of it flows down along the slope into the lower cone 4 and flows back into the storage battery through the gas venting/acid dripping hole 7. At this time, even if some of the droplets move from the gap 12 to the cavity 13', the amount is suppressed to an extremely small amount by the blocking action of the drip-proof piece 5. If the vertical gap between the cone 3 and the lower cone 4 is set appropriately, droplets will not overflow to the upper cone 4.

In particular, when the microporous filter 11 is disposed between the upper cone 3 and the exhaust hole 10 as shown in the embodiment, the acid fog removal effect is further increased and the exhaust gas also has an explosion-proof function. It can be a stopper.

It should be noted that the present invention is not limited to the above-mentioned embodiment, and it is of course possible to omit the screw of the plug body and to fit the exhaust plug into the liquid opening of the storage battery lid.

As mentioned above, the exhaust plug of this invention has the function of removing acid mist and preventing the electrolyte from rising, so even if it is used in a storage battery with a higher maximum liquid level than before, it will ensure that the liquid does not overflow from the exhaust hole. Therefore, it is ideal for maintenance-free type storage batteries that have a higher maximum liquid level than conventional ones and have a longer life, and for storage batteries that are subject to vibration, shock, or agitation during use.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view of the main parts of a storage battery equipped with the exhaust plug of the present invention, Fig. 2 is a longitudinal sectional side view of the same exhaust plug cut so that the cross section perpendicular to the cross section of Fig. 1 is visible, and Fig. 3 The figure is a perspective view of the drip-proof block, and FIG. 4 is a sectional view taken along line AA in FIG. 1. 1... Exhaust plug, 2... Drip-proof block, 3... Upper cone, 4... Lower cone, 5... Drip-proof piece,
6, 7... Gas venting and acid dripping hole, 8... Plug body,
9...Side gas vent hole, 10...Exhaust hole, 11...
... Micropore filter, 12... Gap.

Claims (1)

[Claims for Utility Model Registration] 1. A drip-proof device in which an upper conical body and a lower conical body, each having a gas venting and acid dripping hole, are integrally connected by a plurality of drip-proof pieces extending radially with respect to a vertical axis. The block is housed in a plug body having a side gas vent hole located below the upper cone body and an exhaust hole located above the upper cone body, and 1. An exhaust plug for a storage battery, characterized in that the positions of the gas venting and acid dripping holes are mutually shifted on a plane, and a gap is provided between the inner wall of the plug body and the end surface of the drip-proof piece. 2. The exhaust plug for a storage battery according to claim 1, which is provided with a microporous filter between the upper cone and the exhaust hole.