GB2178155A

GB2178155A - Gas burner assembly

Info

Publication number: GB2178155A
Application number: GB08518596A
Authority: GB
Inventors: Donald Whitehouse
Original assignee: Valor Heating Ltd
Current assignee: Valor Heating Ltd
Priority date: 1985-07-23
Filing date: 1985-07-23
Publication date: 1987-02-04
Also published as: GB2178155B; GB8518596D0

Abstract

A gas burner assembly has a plurality of burners (11) fed by injectors (12), (13), and also restrictors (19, 21) adapted in use to be connected to a supply of gaseous fuel for supplying gas to flame effect burners. An initially separate plate 22 is provided on which are mounted the aforesaid injectors or restrictors (12, 13, 19 and 21). For the purpose of testing the gas tightness of the various connections between the burners and the gas supply system the plate 22 is initially not assembled to the burner body or carrier 10 and the outlet sides of said injectors or restrictors 12, 13, 19 and 21 are blocked off. Said injectors or restrictors are then connected by suitable pipework to the gas supply system and gas admitted thereto whereafter the connections in said pipework are tested for gas tightness by any convenient method. On such gas tightness being proved the outlet sides of said injectors or restrictors are opened and the aforesaid plate 22 is then connected to the burner body or carrier by screws or rivets. <IMAGE>

Description

SPECIFICATION Gas burner assembly This invention relates to a gas burner assembly of the kind comprising a plurality of burners and at least two injectors or restrictors or like components which are adapted in use to be connected to a supply of gaseous fuel. Such a gas burner assembly may for example form part of a gas-fired heating or cooling appliance and in assembling such an appliance it is necessary to ensure that all connections in the various gas supply pipes are gas-tight before the appliance is despatched from the works of the manufacture.

The object of the present invention is to provide a construction of a gas burner assembly of the kind specified which facilitates such testing of the gas connections.

In accordance with the invention there is provided a gas burner assembly of the kind specified wherein the assembly comprises a burner body or carrier in which or on which are provided a plurality of burners together with a plate which is formed initially separately from the burner body or carrier and on which is mounted at least two injectors, or restrictors or like components, said burner body or carrier and said plate then being finally connected together.

The burner body or carrier may for example incorporate two or more strip-type burners and two or more spaced burners such as flame-effect burners and the plate and body or carrier may be connected together by releasable fastening means such as one or more screw. Alternatively, rivets may be used.

The invention will now be more particularly described with refeence to the accompanying drawing wherein Figure 1 is a fragmentary perspective view showing part of a gas burner assembly in accordance with the present invention, the burner body or carrier being shown when connected to the aforesaid plate, and Figure 2 is a fragmentary view, also in perspective, of the assembly shown in Fig. 1 but with the plate disconnected from the burner body or carrier.

Referring now to the drawing there is shown therein part of a burner body or carrier 10 which may for example form part of a domestic gas-fired heating appliance. Said burner body or carrier is formed along its upper surface with a plurality of slots 11 which may be conveniently divided into a plurality of sections, each such section forming a so-called strip burner. Furthermore said sections may be so divided that either all or alternatively only some of such strip burners are supplied with gas as may be required by the unit user. In the example now described said strip burners (which in use may be used to heat ceramic radiants) are divided into two sections which are respectively supplied in use by a pair of injectors 12 and 13 which are arranged to direct gas towards and into a pair of co-acting ports 14 and 15 (see Fig. 2) formed at one end of said burner body or carrier.

The aforesaid gas-fired appliance is also provided with a plurality of further separate burners (not shown) which for example are intended for use as flame-effect burners and which may also be divided into two sections which are respectively supplied by gas passing along supply pipes 16 and 17. One end of said supply pipe 16 is connected by means of a union nut 18 to a restrictor or like component 19 whereas one end of the supply pipe 17 is connected by means of another union nut 20 to another restrictor 21.

As will be seen from Fig. 2 the aforesaid injectors or restrictors or like components 12, 13, 19 and 21 are mounted on a plate 22 which is formed separately from the burner body or carrier 10 itself. To this end the plate 22 is formed with a pair of parallel flanges 23 and 24 which can respectively be engaged with a pair of flanges 25 and 26 formed at one end of said burner body or carrier and can be secured thereto by means of a pair of screws 27 and 28. It will therefore be understood that by using said screws the plate together with the aforementioned four injectors or restrictors 12, 13, 19 and 21 can be readily assembled to or disconnected from the burner body or carrier.

It will also be appreciated that it is necessary to test the gas supply system of an individual gas-fired appliance in order to check whether there are any possible leakage points in the system before the appliance leaves the manufacturer's works. It has therefore been common practice to take a chassis on which has been mounted such items as a heat exchanger, a radiant box, and gas control mechanism together with the relevant pipework and the burner assembly in order that such testing may be carried out, the outer casing, ceramic radiant elements themselves and any miscellaneous trim being added later after testing has been carried out.Hitherto however the burner assembly has incorporated the burner body or carrier together with the aforesaid plate as an integral assembly and such an arrangement, especially where several injectors or restrictors are involved, has meant that the testing procedure entails a somewhat time consuming operation which necessitates the disconnecting and reconnecting of the various components.In the case of the present invention however the plate 22, carrying the aforesaid injectors and restrictors, is connected on its own to the gas supply system and the outlet sides of said injectors and restrictors can be readily and simply blocked off before a gas supply is connected to the inlet side of the injectors and restrictors through the previously assembled pipework, any leak age of gas then being registered during such test by a reading taken from a flow meter inserted into the gas supply system. If all connections are proved to be gas tight as a result of this testing then the injectors and restrictors are unblocked and the burner body or carrier 10 can simply be connected to the plate 22 by means of the two screws 27 and 28 and the only remaining test to be done concerns the tightness of the joints made by the union nuts 18 and 20 on the restrictors 19 and 21. Such tightness can readily be tested by means for example of a simple soap bubble test. Alternatively, after testing, said plate can be connected to the burner body or carrier by rivets or even by welding if desired.

The present invention therefore, involving a separately formed plate carrying the injectors or restrictors, does facilitate the testing of the gas supply system of the gas fire before the casing, radiants and other trim is added.

Claims

1. A gas burner assembly of the kind comprising a plurality of burners and at least two injectors or restrictors or like components which are adapted in use to be connected to a supply of gaseous fuel, wherein the aforesaid assembly comprises a burner body or carrier in which or on which is provided a plurality of burners together with a plate which is formed initially separately from the burner body or carrier and on which is mounted at least two injectors or restrictors or like components, said burner body or carrier and said plate then being finally connected together.

2. A gas burner asembly as claimed in Claim 1 wherein the burner body or carrier incorporates two or more strip-type burners and two or more spaced burners, said plate and the body or carrier being connected together by releasable fastening means.

3. A gas burner assembly as claimed in Claim 1 or Claim 2 wherein the plate and the burner body or carrier are provided with coacting flange means which are connectible together.

4. A method of manufacturing a gas burner assembly as claimed in Claim 1 wherein the outlet sides of said injectors or restrictors or like components mounted on said plate are blocked off before the plate is connected to the burner body or carrier, the inlet sides of said injectors, restrictors or like components then being connected by suitable pipework to a gas supply whereafter all joints in such pipework are tested for gas tightness in any convenient manner, the outlet sides of said injectors, restrictors or like components then being opened and the plate connected to the burner body or carrier.

5. A gas burner assembly of the kind specified substantially as hereinbefore described with reference to and as shown in the accompanying drawing.