ES2264632B1 - FIRE EXTINGUISHER. - Google Patents

Abstract

Fire extinguisher. It consists of a container (2) container of the liquid extinguishing product (3). Inside and centrally there is the explosive charge (5) and around it an air, gas or fluid chamber (7) limited by a bladder (8) preferably elastic. The air, gas or fluid (7) is of lower density than the retarding liquid (3) of the rest of the container (2). The explosive (5) communicates with the outside through a wick (6) and when it explodes produces a water hammer effect against the liquid (3) and walls of the container (2), optimizing its dispersion and mixing forming a large amount of foam.

Description

Fire extinguisher.

Object of the invention

The present invention, as expressed by the set forth in this specification, refers to a fire extinguisher fires and is of the type constituted by a container container of the extinguishing product, not under pressure and whose driving device is determined by an explosive charge that occupies the central area of the container, activated by a detector of heat

It is an object of the invention to provide vessel of a trigger activator element, which improves considerably foaming during the explosive phase, the extinguishing product being a flame retardant liquid. With his structure also reduces the danger of breakage of the container or container when exploding.

Background of the invention

Currently devices are used fire fighting, of the type of so-called fire extinguishers and in  The extinguishing product is under pressure in the inside the container container, so that the product goes outside when manually acting on the device valve that is located in the head of the extinguisher.

This type of device makes necessary the periodic check of its charging status, so if this it is not carried out with certain frequency, it can happen that when using the extinguisher, the pressure is less than the required one and the device is ineffective.

In the invention patent P-9002749, of the same applicant hereof invention, an extinguishing device was disclosed and fire prevention, in which a plastic container with alloy of flame retardant material housed inside the product of extinction and an isolated and immobilized explosive charge in the area  central, leaving the latter in communication with a wick that access through the mouth of the container, closed by a plug and a capsule seal moisture. On the periphery of the container there are lugs provided with a double hole through which passes the wick and a cord of fireproof material at the same time which defines the suspension means of the container for laying of line that acts as a firewall, as well as serving as protection element of the wick having a larger diameter than is.

In the Certificate of Addition with number of Application 9501235 of this cited Invention Patent, is contemplate some improvements designed with the purpose of achieving a controlled delay of the explosion, as well as sound the start of the ignition, warning the operator of the impending explosion of the extinguisher.

Subsequently devices have been appearing new ones that improve the performance of those described previously, but nonetheless, the use of Smaller explosive charges, maintaining expansion power of the extinguishing product, achieve less container breakage dangerous and, above all, obtain an effective conversion of the liquid used as an extinguishing product, in foam, as it has been demonstrated  that its performance is higher than other extinguishing products, especially when smothering fires in the presence of hydrocarbons, since they cover more surface and suffocate the fire.

Description of the invention

In general, the fire extinguisher object of the present invention is constituted by a container similar to those mentioned above, which incorporates inside an air, gas or fluid chamber enclosed in a shell or bladder preferably elastic, this chamber being in turn surrounding the Centrally arranged explosive product.

The air, gas or fluid used will be smaller density than the flame retardant liquid, and said chamber will have a internal pressure equal to or greater than atmospheric.

The gas contained in this chamber, when the explosive produces a water hammer effect against the liquid of Extinction and container walls, which greatly improves its dispersion and mixing, suddenly forming a large amount of foam.

Another important effect of highlighting is the cushioning said chamber makes the destructive effect of explosive, since the thrust of the contents of the chamber and then this gas presses on the liquid flame retardant, creating a kind of expansion in two phases.

The bladder can be deformed by the effect of flotation of its contents offsetting or displacing the air or gas of  the camera to the area of interest depending on the conditions of its location in the event of a possible fire.

To facilitate the understanding of characteristics of the invention and forming an integral part of this Descriptive report, accompanying some sheets of plans in whose figures, with an illustrative and non-limiting nature represented the following:

Brief description of the drawings

Figure 1.- It is a schematic view of a fire extinguisher in accordance with the present invention.

Figure 2.- It is a schematic view, similar to Figure 1, in a position where the bladder is displaced with respect to the cylindrical contour of the container.

Description of the preferred embodiment

Referring to the numbering adopted in the figures, we can see how the fire extinguisher that the invention proposes, is referenced in general with the number (1) and constituted by the container (2) containing the liquid flame retardant (3) up to a certain level. The tube (4) contains the explosive charge (5) and it reaches the wick (6) that leaves the Exterior.

Surrounding the explosive charge (5) is the chamber (7) occupied by air, gas or fluid enclosed in the bladder (8) preferably elastic.

Figure 2 shows the position Offset of the bladder (8) from the center of the container cylindrical (2), which is achieved by the flotation effect of the fluid contained inside the bladder (8) since, as we have  indicated above, the density of this fluid is less than the of the flame retardant liquid (3).

Claims (1)

1. Fire extinguisher, of the type that consists of a container containing the extinguishing product, not under pressure, going outside when a driving device is activated, commanded by a heat detector and defined by an explosive charge that occupies the central area, characterized in that it incorporates in its interior, surrounding the explosive charge (5), a chamber (7) of air, gas or fluid enclosed in a bladder (8) preferably elastic, being this air, gas or fluid of lower density that the flame retardant liquid (3) of the rest of the container (2) and at a pressure equal to or greater than atmospheric, which determines that when the explosive explodes and as a result of a water hammer against the extinguishing liquid (3) and walls of the container (2), its dispersion and mixing occur suddenly forming a large amount of foam.