EP0667491A2 - Kraftstoffzufuhreinrichtung für Brenner - Google Patents

Kraftstoffzufuhreinrichtung für Brenner Download PDF

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Publication number
EP0667491A2
EP0667491A2 EP95400282A EP95400282A EP0667491A2 EP 0667491 A2 EP0667491 A2 EP 0667491A2 EP 95400282 A EP95400282 A EP 95400282A EP 95400282 A EP95400282 A EP 95400282A EP 0667491 A2 EP0667491 A2 EP 0667491A2
Authority
EP
European Patent Office
Prior art keywords
valve
throttle
pump
supply device
fuel supply
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP95400282A
Other languages
English (en)
French (fr)
Other versions
EP0667491A3 (de
Inventor
Klaus Dieter Buchmüller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suntec Industries France SA
Original Assignee
Suntec Industries France SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Suntec Industries France SA filed Critical Suntec Industries France SA
Publication of EP0667491A2 publication Critical patent/EP0667491A2/de
Publication of EP0667491A3 publication Critical patent/EP0667491A3/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K5/00—Feeding or distributing other fuel to combustion apparatus
    • F23K5/02—Liquid fuel
    • F23K5/14—Details thereof
    • F23K5/147—Valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K5/00—Feeding or distributing other fuel to combustion apparatus
    • F23K5/02—Liquid fuel
    • F23K5/04—Feeding or distributing systems using pumps

Definitions

  • the present invention relates to a fuel supply device for a burner comprising a nozzle.
  • the fuel supply device comprises, in accordance with the preamble of claim 1, a fuel pump driven by an electric motor, a shut-off valve ensuring the closure of a connection between a discharge connection of the fuel pump and the nozzle, a pilot valve ensuring the supply and discharge of a hydraulic cylinder with the pressurized fuel discharged by the pump through a throttle.
  • the invention particularly relates to a pressure spray burner.
  • the fuel pump must draw the liquid fuel into a tank and bring it to a pressure favorable for spraying.
  • a pressure relief valve as well as a solenoid valve which either serves directly as a shut-off valve between the pump and the nozzle, or is added to a shut-off valve and then serves as a relief valve for discharging pressure from the pump.
  • the pump starts when the burner is started, against the pressure introduced by the pressure relief valve.
  • the electric drive motor must be able to adapt to the starting load. Single-phase AC motors, usually used in this case, are however relatively expensive since the starting time must be high.
  • the devices which operate in a higher pressure range are provided with a relief valve, already mentioned, which is opened or opened when the burner is started, so that it does not no pressure is created in the discharge connection of the pump, thus making it possible to start a pump driven by an electric motor having a low starting torque.
  • the relief valve is not closed until after the pump has started, so that the pressure in the discharge connection of said pump takes its operating value.
  • the start of an oil burner takes place usually in several phases. In certain devices, during the transition between two phases, a drawer, a slide or a shutter is adjusted, thus carrying out the adjustment while the flame is already burning.
  • the present invention aims to provide a fuel supply device having the characteristics of the preamble of claim 1, which guarantees safer operation from inexpensive components.
  • a fuel supply device having the characteristics of the preamble of claim 1 and characterized in that the throttle is connected directly to the hydraulic cylinder and in that the pilot valve consists of a 2/2 distributor which allows the opening and closing to be controlled bypass extending from the junction between the throttle and the hydraulic cylinder to a return or to the suction connection of the pump.
  • the pilot valve When the pilot valve is open, no pressure can build up between the throttle and the hydraulic cylinder. Fuel flows well between the throttle and the pilot valve. However, this quantity of fuel is so small that it can simply be taken from the excess delivered by the pump. If the hydraulic cylinder must be actuated, the pilot valve is closed so that a pressure corresponding to the load is established inside the hydraulic cylinder.
  • a discharge valve is used for this purpose, through which the discharge connection of the pump can be connected to a return or to a suction connection of said pump.
  • the relief valve for the pressureless starting of the pump, is now arranged parallel to the throttle.
  • the throttle and the relief valve are connected to the connecting line between the pump and the shut-off valve.
  • the hydraulic cylinder In normal burner operation, the hydraulic cylinder remains in a determined position, which means that the pilot valve also maintains a determined position. To reduce the consumption of electrical energy, it is advantageous to ensure that the pilot valve, actuated by an electromagnet, is in the normal operating position when the electromagnet is not supplied and is moved in the another position under the action of the electromagnet.
  • the relief valve should only be opened during the pressureless start of the pump.
  • the discharge valve, actuated by an electromagnet it is advantageous for the discharge valve, actuated by an electromagnet, to be brought by said electromagnet from the closed position to the open position.
  • the shut-off valve When the shut-off valve is actuated by an electromagnet, it must, for safety reasons, be adjustable by the electromagnet, from a closed position to an open position. In the event of failure of the electromagnet or of the electrical circuit, fuel must not reach the nozzle. Wiring costs are particularly reduced because the relief valve controlled by an electromagnet is adjusted from the open position to the closed position by supplying said electromagnet and the two electromagnets of the discharge and stop valves are globally controllable.
  • claim 10 relates to a modular unit comprising a fuel pump, a shut-off valve and a wired pilot valve according to one of the preceding claims and comprising external connections as well as various bores between the independent components and the external connections.
  • a modular unit is considerably simpler to produce and to handle than the one-by-one arrangement of the different components and their connections by pipes or tubes.
  • a pump 10 for supplying fuel to a fuel burner, said pump 10 possibly being, for example, a positive displacement gear pump with internal teeth, driven by a electric motor 11 and sucking the fuel into a tank through a suction line 12 to discharge it into a discharge line 13.
  • This discharge line 13 can be closed in the direction of the nozzle by a stop valve 14, which consists in a valve with seat forming a 2/2 distributor, which can be brought from a closed position, in which it is held by a spring pressure cylinder 15, in an open position, by the supply of an electromagnet 16.
  • a pressure regulator 17 On the discharge line 13 located between the pump 10 and the stop valve 14, is firstly connected a pressure regulator 17 with which one can adjust the operating pressure and return the quantity of excess fuel discharged by the pump 10, into a return line 18.
  • the relief valve 26 is a 2/2-way valve having a seat valve which can be held in one of its two positions, against a return force, by an electromagnet 27.
  • the valve discharge 26 is in the closed position and the restoring force is exerted by the pressure of the fuel.
  • the electromagnet 27 maintains the open position and the restoring force is exerted by a cylindrical pressure spring 28.
  • a pilot valve 29 which also consists of a 2/2 distributor having a seat valve which can be brought by an electromagnet 31, from a rest position in which it is closed, position maintained by the force of a cylindrical pressure spring 30, in an open position.
  • the side of the pilot valve 29 opposite the throttle 25 and the relief valve 26 is connected to the return line 18.
  • the pump 10, the shut-off valve 14, the pressure relief valve 17, the throttle 25 and the relief valve 26 as well as the valve 29 are, as shown in broken lines, in FIGS. 1 and 2 , integrated into a modular unit 35 which has a first external connection 36 connected to the outlet of the stop valve 14 affixed to the pump 10 and which can be connected to a line 40 leading to the nozzle, a second external connection 37, of which connections arise the constriction 25, the relief valve 26 and the pilot valve 29 and to which a line 41 leading to a hydraulic cylinder 42 can be connected, a third external connection 38 to which the suction line 12 is connected and a connection of return 39 to which the return pipe can be connected 18.
  • the connections between the independent components located inside the modular unit 35 and the external connections are made inside said modular unit by bores or other hollows, as is the practice for hydraulic units comprising several independent components.
  • the electromagnet 27 is energized and closes the relief valve 26.
  • the pilot valve 29 remains open.
  • the electromagnet 16 is also supplied so as to open the shut-off valve 14. Even if a small quantity of fuel still reaches, through the throttle 25 and the pilot valve 29, at the return connection 39, the pressure operating is established in the discharge line 13 and in the line 40 leading to the nozzle, allowing the flame to be lit. After a certain ignition time, the electromagnet 31 is disconnected, thus closing the pilot valve 29. Between the pilot valve 29 and the throttle 25 there is established, against the opposing force in the hydraulic cylinder 42, a corresponding pressure, so that the plunger of the hydraulic cylinder 42 is deployed. The position reached is maintained during normal operation thus obtained.
  • the two electromagnets 16 and 27 of the valves 14 and 26 are also put to rest. It is understood that, in the configuration shown in Figure 1, the two electromagnets 16 and 27 are always energized and de-energized at the same time. This is why they can be ordered globally, thereby reducing wiring costs.
  • the electromagnet 27 of the relief valve 26 is always supplied when the electromagnet 16 of the valve stop 14 is disconnected, and disconnected when the electromagnet 16 is supplied.
  • the two electromagnets 16 and 27 cannot therefore be controlled globally using the same line.
  • the electromagnet 27 is energized only during the pressureless start of the pump 10, so that, during the operating time, the consumption of electricity is reduced.
  • the modular unit 35 has a frame 45 which is made up of a part of the frame of the pump 10 or which is connected thereto.
  • This frame 45 has the external connections 36, 37, 38 and 39.
  • the valves 14, 17, 26 and 29 are mounted on this frame 45 and arranged, at least in part, inside the recesses formed on said frame 45.
  • the two valves 14 and 29 are fully known in the prior art both for their combined use and for their overall structure.
  • There are seat valves which contain, inside a recess of the armature 46 of their magnet, a deformable closing member 47, which can come to press on the face of a valve seat 48 in the form of sleeve, screwed into frame 45.
  • the valve 26 is also a seat valve whose seat 49 also serves as a pole piece on which a face of the armature 50 of the magnet directly rests when the valve is closed.
  • the valve 26 is also known in its general construction and has already been used to allow a pressureless start of a fuel pump. Above this known construction, the throttle 25 is now integrated into the valve 26.
  • the valve seat 49 has, in its center, an axial bore 54 which extends a bore of the housing 51
  • the valve seat 49 has two slots 52, diametrically opposite and extending over the entire length of the axis of the valve seat 49.
  • the constriction 25 consists of a notch extending radially and opening on the armature 50 of the magnet and formed in the face of the valve seat 49 oriented in the direction of said armature 50.
  • the notch extends radially between the central bore 54 and one of the slots 52 of the valve seat 49.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Magnetically Actuated Valves (AREA)
EP95400282A 1994-02-12 1995-02-10 Kraftstoffzufuhreinrichtung für Brenner. Withdrawn EP0667491A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19944404517 DE4404517C2 (de) 1994-02-12 1994-02-12 Hydraulische Schaltung für einen Ölbrenner
DE4404517 1994-02-12

Publications (2)

Publication Number Publication Date
EP0667491A2 true EP0667491A2 (de) 1995-08-16
EP0667491A3 EP0667491A3 (de) 1996-03-27

Family

ID=6510119

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95400282A Withdrawn EP0667491A3 (de) 1994-02-12 1995-02-10 Kraftstoffzufuhreinrichtung für Brenner.

Country Status (2)

Country Link
EP (1) EP0667491A3 (de)
DE (1) DE4404517C2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7900477B2 (en) 2002-06-24 2011-03-08 Asahi Glass Company, Limited Method of positioning a glass plate using pivoting rollers

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19627278A1 (de) 1996-07-06 1998-01-15 Gruenewaelder Dieter Vorrichtung zur Erzeugung eines Brennstoffschichtengemisches

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0054599A1 (de) * 1980-12-22 1982-06-30 Maschinenwerke Altenrhein AG Brenner für flüssige Brennstoffe
FR2552844A1 (fr) * 1983-10-03 1985-04-05 Danfoss As Agencement de soupape comprenant au moins deux soupapes a membrane
EP0263340A2 (de) * 1986-10-08 1988-04-13 ABIG WERKE Carry Gross GmbH & Co. KG Ölbrenner

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1551657A1 (de) * 1967-11-03 1970-06-25 Eckerle Otto Mit einem Magnetventil kombinierte OElbrennerpumpe mit Schnellschlussventil
DE3636647A1 (de) * 1986-10-28 1988-05-19 Danfoss As Heizoelpumpe fuer wahlweisen ein- oder zweistrang-betrieb

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0054599A1 (de) * 1980-12-22 1982-06-30 Maschinenwerke Altenrhein AG Brenner für flüssige Brennstoffe
FR2552844A1 (fr) * 1983-10-03 1985-04-05 Danfoss As Agencement de soupape comprenant au moins deux soupapes a membrane
EP0263340A2 (de) * 1986-10-08 1988-04-13 ABIG WERKE Carry Gross GmbH & Co. KG Ölbrenner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7900477B2 (en) 2002-06-24 2011-03-08 Asahi Glass Company, Limited Method of positioning a glass plate using pivoting rollers

Also Published As

Publication number Publication date
EP0667491A3 (de) 1996-03-27
DE4404517C2 (de) 1999-07-29
DE4404517A1 (de) 1995-08-17

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