FR2613818A1 - Connection kit for a stove (closed hearth) - Google Patents

Abstract

The invention relates to a set of cylindrical elements to be assembled together which, by rotational and translational movement, permit the connection of the stove to the flue (smoke pipe), where the heights and degrees of non-axiality of the flue (pipe) may have various values, with little bending.

Description

The present invention relates to a kit consisting of a set of standardized parts which, by their assembly configuration, make it possible to solve the problems posed by the connections of closed hearths when they are deported with respect to the axis of the conduit. . Closed hearths for decorative fireplaces constitute the greater part of the field of application to which the invention relates. However, it should be noted that fireplaces with an open fire, boilers of all types of fuels, form an integral part of the field of fire. application of the present invention,
The problem that the invention solves is as follows: it is a question of connecting the circular section nozzle for evacuation of the combustion gases of a heating apparatus such as closed hearth, boiler, etc. to a conduit of traditional smoke of different section according to the choice made by the manufacturer (Architect, XaStre-d'Oeuvre, Xaçoni.) The duct sections are unfortunately determined before the purchase of the device to connect to this duct the most widespread dimensions being
20 cm X 20 cm 30 cm X 30 cm
25 cm X 25 cm 20 cm X 40 cm for bush types terracotta or pozzolan; and of diameter 200 = or 230 mm for the cylindrical ducts.

To the variety of dimensions in the duct sections, it should be added that the distance between the vertical axis of the duct and the axis of the smoke outlet nozzle of the appliance to be connected varies from o to 80 cm and this in any direction.

The current technique consists of two solutions 1) - Use of bushels of terracotta
This solution has the main drawbacks - poor resistance to high temperatures (700-800- to the flue outlet nozzle) - the connection of the last element to the existing duct (complex form to be made in traditional masonry).

- the impossibility to connect if the misalignment is important
pounding bushels becoming precarious.

- fire hazards due to soot accumulations in variations
non-progressive sections.

2) - Use of various stainless steel parts.

This solution has the main disadvantages: - many different parts in stock to solve each case.

- because of the large number of parts, a high marketing cost.

- a non-compliance with the rules in force on duct detours which limit the deviation angles to 30 and therefore allow only low value misalignments, if the 30 are respected.

- lack of rigidity of the interlockings.

The following detailed description, for a better understanding, is an example of an embodiment of a non-limiting connection assembly with reference to the accompanying drawings in which - Figure (1) is a sectional view of the connection kit.

- Figure (2) is a detailed sectional view of the connection to the con
existing duit.

- Figure (3) is a sectional view of the adjustable angle assembly
between 2 cylindrical elements.

The connection kit according to the invention comprises 4 pieces (1), (2), (3) and (4) cylindrical, for example made of 304 stainless steel 5 / 10th of a thickness.

The piece (1) is nested outside the flue outlet nozzle of the device to be connected. This piece and the piece (4) is of low height. Indeed, for a given height h and misalignment d, the more the parts (1) and (4) are of small height, the lower the value of the deviation angles ac (the value of Oc for h = 1.60 m and d = 0.80 m remaining always less than 30 and thus respecting the rules DThU in force).

The settings of the pieces (1), (2), (3) and (4) are obtained by rotations between (1) and (2), between (2) and (3), between (3) and (4), by translation between (2) and (3).

The angle adjustment between the pieces (1) and (2) and the pieces (3) and (4) is obtained easily because each of these pieces has an end cut with a predetermined angle of less than 30 ', giving a section of slightly elliptical cut, the folded in which comes to fit the collar (9) being brought back to a cylindrical outer shape (this technique being easily achievable in sheets of small thicknesses 5 / 10th> about>.

The collars (g>, (10) and (11) allow once the set positioned in its final configuration, to stiffen the entire connection, eliminating any problems of untimely dislocations during sweeping.

For connection to the existing duct, a plate (5) closes the plug (6) holding the piece (4) in position in the plug (6) by means of two hooks (7> which catch in the plug ( 6) by means of 2 holes and tighten the plate (5) against the plug (6) by nut on the hooks (7) threaded at their end, Once the pieces (4z, (5>, (7) in place, a funnel shape (8> is made (with a refractory mixture for example> from the inside of the piece (4).

This type of connection makes it possible to create a funnel without loss of loads and without soot pockets, while having a standard kit for the 20 x 20 cm, 25 x 25 cm, 30 x 30 cm and 20 x 40 cm drainage ducts.

 It is possible to add a stitch of the desired diameter to the workpiece (1> or the workpiece (2), and thus connect with a flexible sheath, a draft regulator acting by a proportional air injection to depression.

Of course, the invention is not limited to the embodiments described and shown, which have been given by way of example.

In particular, it includes all the means constituting technical equivalents of the means described, and their combinations if they are executed according to the spirit of the invention and implemented in the context of the following claims.

Claims (4)

 1) Connection kit for closed hearth, comprising 4 cylindrical parts (1), <2>, (2), (3) and (4), characterized in that the rotations between (15 and (2), between (2) and (3), between (3) and (4), and 1 translation between (2) and (3) make it possible to make connections of varying heights and mismatches varying from 0 to 80 cm.  2) Connection kit for closed hearth according to claim 1, characterized in that the deflection angles are placed at each end of the connection, thus respecting values of less than 30 ', in force and minimizing the pressure losses of the gaseous flows.  3) Connection kit for closed hearth, according to claims 1, 2, characterized in that the angle settings between (1) and (2) on the one hand, and (3) and (4) <4> d on the other hand, are obtained by rotation of each of the parts, the cylindrical flaps being immobilized by clamping the collars (9) and (10).  4) Connection kit for closed hearth, according to claims 1, 2 and 3, characterized in that the part (4) supported by the plate (5) and the 2 hooks (7) allows to move from the cylindrical section to the square or rectangular section, without loss of loads by formation of a cone.