US 3295584 A
Description (OCR text may contain errors)
Jan. 3, 1967 Al -i. PRocToR 3,295,584
VALVE AND BURNER MANIFOLD ARRANGEMENT Filed June 12, 1964 U LO IN VENT'OR ALBERT EDWARD PROGTOR United States PatentCfifice 3,295,584 Patented Jan. 3, 1967 3,295,584 VALVE AND BURNER MANIFOLD ARRANGEMENT Albert Edward Proctor, Wembley, England, assignor to Airoil Burner Company (G.B.) Limited, West Drayton, England, a British company Filed June 12, 1964, Ser. No. 374,794 Claims priority, application Great Britain, June 14, 1963, 23,844/ 63 6 Claims. (Cl. 158-75) The present invention relates to a valve arrangement and more particularly to -a valve arrangement by which fuel can be supplied to a burner,
The valve arrangement of the invention is particularly useful for controlling the feeding hazardous fuel such as naphtha or petrol to a burner for a furnace or the like.
According to the present invention a valve arrangement, by which fuel can be supplied to a burner, comprises: a valve body incorporating a first chamber with a first inlet in a first normally closed valve in the chamber, to control the fuel fiow to the burner through a first outlet; a burner manifold detachably secured to the valve body; a first movable member mounted on the valve body by which the first valve can be opened; a second movable member mounted on the burner manifold and serving to transmit movement of the first member to the first valve only when the manifold and the valve body are secured together so that the first valve can be opened by movement of the first member only when the manifold is secured in its operative position to the valve body.
An embodiment of the invention will now be described by Way of example only and with reference to the single feature of the accompanying drawing which is a side elevational view partly in section of the valve arrangement of the invention.
The valve arrangement comprises a valve body 1 incorporating a first chamber 2. The chamber 2 has a first inlet 3 and a first outlet 4, the latter being normally closed by a spring loaded first valve 5. The outlet 4 communicates with a burner manifold 12 through a passage 6. Fuel, such as naphtha, can be fed to the burner manifold 12 from a fuel pipe, not shown, adapted to be connected to the inlet 3. The flow of fuel to the burner manifold 12 can be controlled by movement of the valve 5.
The valve 5 is movable by means of a first movable member or rod 7, having a threaded portion 7a, which is itself movable axially within the valve body 1 by rotation of a wheel 8 on one end, the threaded portion 7a passing through a tapped hole in a plate 9 supported by arms 10 connected to the valve body 1. The burner manifold 12 has a flexible diaphragm 11 mounted on it which supports a second movable member or stud 13 so that when the burner manifold 12 and the valve body 1 are connected together the stud 13 is between the free end of the rod 7 and the valve 5. Only When the stud 13 is in this position will axial movement of the rod 7, to the right as viewed in the drawing, move the valve 5 against its spring 5a to open the outlet 4, this position being shown in the drawing, since the stud 13 is required to transmit movement of the rod 7 to the valve 5.
The mechanism by which the burner manifold 12 is connected to the valve body 1 includes a toggle operated clamp which has an operating arm 14 with an aperture 14a in it, through which the free end of the rod 7 passes when the arm 14 is in its locked position and when the rod 7 is holding the valve 5 open. The valve body 1 can thus not be disconnected from the burner manifold 12 until the valve 5 has been closed. This ensures that the fuel supply is cut off before the disconnection is made.
The rod 7 incorporates a second valve 7b of enlarged cross-section intermediate its length and situated in a second chamber 15 in the valve body 1. The second chamher 15 has a second inlet 16, through which steam can be supplied, and a second and third outlet 17 and 18 respectively. The outlet 17 communicates through a passage 19, in the valve body 1, with the outlet 4 to the valve chamber 2 and is closable by axial movement of the second valve 7b of the rod 7 in the right hand direction as viewed in the drawing. Closure of the second outlet 17 occurs simultaneously with the opening of the valve 5, when the valve body and burner manifold are operatively connected together.
The third outlet 18 from the second chamber 15 is controlled by an independent third valve 20 operable by a wheel 21. The outlet 18 communicates with the burner manifold 12 through a passage 22.
In operation the valve body 1 and burner manifold 12 are in the position shown, that is with the valve 5 open so that fuel is supplied to the burner manifold through the inlet 3, chamber 2, outlet 4 and passage 6. The fuel is atomized by steam that is fed to the 'burner manifold through the inlet 16, chamber 15, outlet 18 and passage 22, the valve 20 being open.
When it is required to disconnect the valve body 1 from the burner manifold 12, the rod 7 must be moved axially to the left, as viewed in the drawing. Initial axial movement of the rod 7 allows the first valve 5 to close under the action of its spring 5a, thus cutting off fuel to the burner, and causes the second valve portion 7b to open the outlet 17 of the chamber 15, thus allowing steam from the inlet 16 to pass to the burner manifold through the passage 19. If the rod 7 is left in this initial position steam will purge the burner manifold of fuel, which is blown by thesteam into the furnace where it is burnt.
Further axial movement of the rod 7 to the left will Withdraw the free end of the rod 7 from within the aperture 14a in the arm 14 and will cause the second valve 7b to close the inlet 16 to the chamber 15 thus cutting off the supply of steam. The valve 20 is then closed and the valve body can be disconnected from the burner manifold since the toggle arm 14 is free to move.
It will thus be seen that with the valve arrangement described the fuel supply to the burner manifold must be cut off and the burner manifold purged of fuel before the valve body can be disconnected from the burner manifold. The risk of fuel leaking from either the burner manifold or from the valve body due to premature dismantling before adequate purging has been carried out is thus removed.
1. A valve arrangement by which fuel can be supplied to a burner manifold comprising: a valve body incorporating a first chamber with a first inlet and a first valve in the chamber to control the fuel flow to the burner through a first outlet, a burner manifold detachably secured to the valve body; an elongate first movable member mounted in the valve body by which the first valve can be opened; a second movable member mounted on the burner manifold between the first movable member and first valve and being aligned with said first member to transmit axial movement of the first movable member to said first valve only when the manifold and valve body are secured together in their operative positions whereby the first valve can be opened only when the manifold and valve body are secured together in their operative positions.
2. A valve arrangement as claimed in claim 1 in which the burner manifold is detachably secured to the valve body by a locking device which when locked can only be unlocked by moving the first movable member to a position where it will cause the first valve to close.
3. A valve arrangement as claimed in claim 2 in which the locking device comprises a toggle mechanism having an operating arm with an aperture therein through which the first movable member passes when the arm is in its locked position and when the first member is simultaneously holding the first valve open.
4. A valve arrangement as claimed in claim 1 in which the valve body has a second inlet communicating with a second chamber in the valve body, the second chamber having a second outlet, a second valve controlling communication between said second chamber and the fuel pas sage through which fuel from the first valve passes to the burnerto permit a second fluid to pass through the fuel passage by way of the second outlet to purge it of fuel, said second valve being movable with said first movable member so that when the first valve is open the second 7 outlet is closed and vice versa.
5. A valve arrangement as claimed in claim 4 in which the second chamber has a third outlet through which steam can be passed to the burner manifold to atomize the fuel, the third outlet being controlled by a third valve.
6. A valve arrangement as claimed in claim 1 in which the first movable member comprises a rod movable axially in the valve body and having an enlargement intermediate its length situated in the second chamber and forming the second valve, one end of the rod bearing on the second movable member which is supported by a flexible diaphragm mounted on the burner manifold so that in one axial position of the rod the said portion closes the sec- 4 0nd outlet and at the same time the said end of the rod urges the second movable member, against the action of the flexible diaphragm, to open the first valve, said rod being moved axially from the said one axial position to- References Cited by the Examiner UNITED STATES PATENTS 1,445,827 2/1923 Fesler 158-73 1,499,107 6/1924 Haynes 158-73 1,523,079 1/1925 Peabody 158-73 2,845,115 7/1958 Paulin 158-73 3,071,936 1/1963 Irwin 137-595 X 3,213,918 10/1965 Rudzki et a1. 158-11 FREDERICK L. MATTESON, JR., Primary Examiner. E. G. FAVORS, Assistant Examiner.