FR2812206A1 - CO2 extinguisher diffuser produces two coaxial plumes, one with conical annular ejection between cones and other through central drilling through cylinder - Google Patents

Abstract

The diffuser produces two coaxial plumes, one with a conical annular ejection through the tube (1) which diffuses the CO2 between cones (2,4). The other plume has a central injection through the drilling which diffuses the CO2 in the center of the cone (4) extended from the cylinder (6).

Description

- i -

  The present invention relates to the diffusion system, called blunderbuss, on carbon dioxide extinguishers,

  used to produce and project dry ice.

  The current technique is such that the product is projected in the form of a narrow, directive and powerful plume. This has the effect of: - not producing a thermal screen for the user,

  which makes it difficult to approach the home.

  - to project the C02 with such a force that it crosses quickly-

  lie the hearth and will be lost beyond without being able to accumulate

on this one.

  - to favor by its power the projection of flammable liquids or small containers placed on a bench

  chemistry for example, while producing strong turbu-

  lances and an air draft on the parts of the hearth not reached

your by C02.

  Currently the implementation of a C02 fire extinguisher is only effective if the user is experienced, skillful

  and intervenes on a punctual focus.

  The device according to the invention makes it possible to minimize

these various drawbacks.

  The plume of dry ice produced by the system according to the invention consists of the component of two plumes produced by a single blunderbuss. One of annular conical shape and the other central. The assembly producing a plume of conical to parabolic shape, according to the dimensions chosen for

the different elements.

The effect produced is such:

  - that it makes a thermal screen for the particular user

  particularly sensitive for homes up to 34 B. - the power of the jet is attenuated without reducing the flow. So snow can accumulate better on the hearth while

  reducing the risk of projection of inflamed liquids

mable.

  - that it makes it possible to include a larger hearth or simultaneously several small close hearths by limiting the returns of

flames towards the user.

  -2 This system allows an inexperienced and clumsy user to have, with more security, more chances of extinguishing a typical fireplace than with the current system. With reference to the accompanying drawings, to FIG. 1, a view in longitudinal section, and to FIGS. 2 and 3, 4 and 5, 6 and 7, which respectively represent a view

  from the front and in longitudinal section three variants of

  by letting it appear, for a better reading

  drawings, which is just necessary for a good understanding

hension.

  The system according to the invention consists of a tube

  (1) which channels the C02 coming from the flexible (10) for the dif-

  fuse through several holes: on the one hand five or six holes arranged radially and inclined in the axis of the ejection, which diffuse part of the C02

  between the two coaxial cones (2) and (4) to exit the tube

  blon through the conical grid (3) by forming an annular plume with a conical or parabolic profile depending on the

  angles and dimensions chosen for the different cones.

  - on the other hand, another part of the C02 passes through a hole in the center of the axis (5), the end of which is conical according to a

  angle close to that of the inclination of the first holes.

  This axis (5) is screwed into the tube (1) and brings the C02 to two other holes which open at the center of the cone (4) from where it exits through the cylinder (6) through the grid (7) to form a plume which fills the center of the annular plume. One thus obtains a generally homogeneous plume of conical or parabolic shape more or less wide and with more or less large range according to the dimensions and the proportions

  chosen for the different elements. The cohesion of the whole

  ble parts is obtained by the nut (8) mounted on the threaded axis (5). A tube of insulating material (11) is mounted on the tube (1) as a handle while the latter is connected to the flexible (10), either directly by a crimped socket (9), or by a threaded connection provided with a seal (not shown here). -3- The realization can be carried out - in brass for the tube (1) and the axis (5), - in plastic for the cones, grids, cylinder and handle - all in metal for the automatic extinguishers where the diffusers can be exposed to fire before extinction

does not fire.

  According to certain embodiments: - With reference to FIG. 1 - the part (6) can be cylindrical as shown here or

  conical according to the desired range and amplitude of the central jet.

  - the parts (4) and (6) can form a block and do not constitute

only one piece.

  - the nut (8) can be replaced by a self-gripping washer-

  spring steel shoe to facilitate quick assembly

  and prevent inadvertent disassembly.

  - parts (2) (3) (4) (6) and (7) may have a base

circular, elliptical or oval.

  - With reference to Figures 2 and 3 the cones (2) and (4) can have any pyramidal shape, here represented by a regular pentagon. The parts (2) (3) (4) and (6) are based on an polygon of identical shape. In this configuration the part (3) has flat faces and can be

  produced by molding in its form developed in the plan.

  This simplifies the mold, all the holes then being parallel. It can then be shaped by folding

and bonding or welding.

  - With reference to Figures 4 and 5 we have a front view

  and in longitudinal section another alternative embodiment.

  According to this embodiment, the parts (1) and (5) of FIG. 1 are replaced by the part (12) which happens to be shorter and which is mounted by a thread directly on a hose or on the head of the extinguisher. . The parts (2) (4) and (6) are replaced by the part (13) which is made in one piece by injection molding directly on the part (12). The coaxial cones producing the diffusion in a crown are secured by means of added spacers and forming a body with the part (13). The specific shape of the part (12) with a shoulder makes it possible to make it integral with the part (13). The model is shown here without grids, these are not necessary for the cohesion of the assembly and are not always desirable according to

the effect we want to achieve.

  - According to another embodiment and with reference to Figures 6 and 7 the cones (2) and (4) previously mounted coaxially according to Figure I are replaced by an assembly of several cones arranged radially, joined in a crown, of the same number as the tube holes (1) and aligned with them. This assembly constituting the part (14) can be produced by injection molding; the grids, optional, being added later. The cones joined in a crown can have another basic shape than the ellipse as shown in Figures 6 and 7 and have a regular circular or polygonal shape as a base.

  or any, not shown here.

  The device according to the invention is particularly intended for portable carbon dioxide extinguishers on

  wheels or fixed installation, automatic or not, including

  for the protection of machines or cooking points, when their action by saturation of the atmosphere is not possible or not recommended -5

Claims (6)

  1 / Device for producing and projecting carbon dioxide snow from a C02 fire extinguisher characterized by a diffusion with a large homogeneous plume, obtained by a double coaxial scattering.   - one with annular and conical projection through a radially drilled tube (1) diffusing the C02 between two coaxial cones (2) and (4) and through the grid conical (3).   - the other, simultaneous to the first, with central projection through the drilled axis (5), the cone (4), the cylinder (6) and through the grid (7).   2 / Device according to claim 1 characterized by the production of parts (2) (3) (4) (6) and (7) not with a circular base, but elliptical, oval or polygonal regular or whatever.   3 / Device according to claim 1 or 2 characters-   risée by the drilling of the tube (1) of several inclined holes in the axis of the ejection.   4 / Device according to claim 1 or 2 characters-   laughed at by the conical shape of the end of the axis (5), on the inlet side of the C02, with an inclination close to that of the tube holes (1).   / Device according to claim 1 or 2 characterized by: - the production of parts (1) and (5) in a single shorter part (12) which acts as a fixing on the extinguisher through a thread.   - The production of parts (2) (4) and (6) in a single block (13), by injection molding directly on the part (12) thus achieving its cohesion with the latter. The cohesion of the coaxial cones producing the diffusion in a crown being integral by means of added spacers and making body with these.   6 / Apparatus according to claim 1 characterized -6- by the production of the annular and conical diffusion produced not by means of the coaxial cones (2) and (4) but by a set of cones arranged radially, joined in a crown (14 ), of the same number and aligned with the holes in the tube (1).   7 / Device according to claim 1 and 6 characters-   laughed at by the basic shape of cones joined in a crown which can be circular, elliptical, regular polygonal or any