EP1252466A1 - Burner with an extension of the venturi tube - Google Patents

Burner with an extension of the venturi tube

Info

Publication number
EP1252466A1
EP1252466A1 EP01949031A EP01949031A EP1252466A1 EP 1252466 A1 EP1252466 A1 EP 1252466A1 EP 01949031 A EP01949031 A EP 01949031A EP 01949031 A EP01949031 A EP 01949031A EP 1252466 A1 EP1252466 A1 EP 1252466A1
Authority
EP
European Patent Office
Prior art keywords
venturi tube
burner
extension
extension means
fuel
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.)
Granted
Application number
EP01949031A
Other languages
German (de)
French (fr)
Other versions
EP1252466B1 (en
Inventor
Renzo Vecchi
Feliciano Lasagni
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.)
Beckett Thermal Solutions SRL
Original Assignee
Worgas Bruciatori SRL
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 Worgas Bruciatori SRL filed Critical Worgas Bruciatori SRL
Publication of EP1252466A1 publication Critical patent/EP1252466A1/en
Application granted granted Critical
Publication of EP1252466B1 publication Critical patent/EP1252466B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/62—Mixing devices; Mixing tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/10—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head
    • F23D14/105—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head with injector axis parallel to the burner head axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Treating Waste Gases (AREA)
  • Nozzles (AREA)

Abstract

A burner (1), with natural or forced suction, comprising a burner body (2), into which a mixture of fuel and air is introduced, said body (2) being provided with openings (4) for the flow and subsequent combustion of said mixture and comprising a Venturi tube (3) into which a jet of said fuel is introduced under pressure and extension means (6) for said Venturi tube (3); said extension means (6) is removably coupled with said Venturi tube (3).

Description

Burner with an extension of the Venturi tube
The invention relates to a burner with natural or forced suction, equipped with a
Venturi tube provided with extension.
The burners with natural or forced suction known from the prior art, in particular the burners for gaseous fuels, are fed with a mixture of fuel and air that is introduced into the burner through a Venturi tube, mounted inside the burner body. In natural suction burners, the primary air required for the combustion of the fuel is sucked inside the burner through a Venturi tube, due to a dragging effect caused by a jet of fuel under pressure injected into the Venturi tube. In burners with forced suction, obtained through a suction or blowing fan, the primary air required for the combustion is introduced into the burner by the combined effect of the action of the fan and dragging of air produced by the fuel jet injected under pressure into the
Venturi tube.
In burners that require a high amount of primary air, higher than the geometry of the
Venturi tube can assures, the above-mentioned dragging effect can be increased by extending the Venturi tube through an extension element having substantially the form of a trumpet, said extension element being mounted at the inlet of the Venturi tube.
The above-mentioned extension of the Venturi tube is generally mounted in the burner when the burner is manufactured and can not be removed, without damaging the burner itself.
That limits the flexibility of use of the burner that substantially can be used only at working conditions that require a high amount of primary air.
It is An object of the present invention to provide a burner with high working flexibility, which can be used in conditions requiring very different primary aeration rates.
According to the present invention, a burner is provided, with natural or forced suction, comprising a burner body, into which a mixture of fuel and air is introduced, said burner body being provided with openings for the flow and subsequent combustion of said mixture, said body comprising a Venturi tube into which a jet of said fuel is introduced under pressure and extension means for said Venturi tube, characterized in that, said extension means is removably coupled with said Venturi tube. That allows said extension means to be mounted only when it is necessary for the working conditions required to the burner and to be dismounted when the working conditions do not require any more the use of said extension means. In such way, a burner is obtained with large flexibility of use, suitable to satisfy a wide range of working requirements.
The invention will be now described here below, with reference to the enclosed drawings, in which:
Figure 1 is an elevation view of a tubular burner according to the invention, provided with an extension element of the Venturi tube;
Figure 2 is a top view of Figure 1 ;
Figure 3 is a partial axial section of the extension element of the Venturi tube;
Figure 4 is a side, enlarged view of the extension element of the Venturi tube.
With reference to the Figure 1 , there are indicated: 1 a burner according to the invention, including a body 2 inside which a Venturi tube 3 is arranged, through the inlet 5 of which a mixture of fuel and air is introduced into the burner 1. The body 2 of the burner 1 is provided, at its upper portion, with openings 3, for example in the form of slots, through which said mixture flows for the subsequent combustion. In the inlet 5 of the Venturi tube 3 an extension element 6 is inserted through which a jet of fuel under pressure is introduced into the Venturi tube 3. An end 7 of the extension element 6, at a distance from the Venturi tube 3, has a flared shape.
The function of this extension element 6 is to increase the air dragging effect produced by said jet of fuel under pressure, in order to increase the amount of primary air introduced into the body 2 of the burner 1.
The extension element 6 is removably connected to the Venturi tube 3, so that it can be separated from the Venturi tube 3, when the working conditions of the burner do not require an increase of the amount of the primary air that can be sucked through the Venturi tube 3 alone, and can be reinserted into the Venturi tube 3 when said increase of primary air is required. The connection of the extension element 6 to the
Venturi tube 3 can be obtained by means of coupling with slight interference, that assures a stable connection, but easy removable even by hand, between the Venturi tube 3 and the extension element 6.
Alternatively, the extension element 6 can be connected to the Venturi tube 3 through removable fastening means. An example of such a connection type is illustrated in the Figures 3 and 4, which show the Venturi tube 3 provided with an internal protrusion 8 insertable into an open slot 9, provided at the end 12 of the extension element 6, that is inserted into the Venturi tube 3. The slot 9 includes a first portion 10, substantially rectilinear and oriented in a direction substantially parallel to the longitudinal axis of the extension element 6, and a second portion 11 preferably arranged at a right angle with respect to said first portion 10. In order to fix the extension element 6 in the Venturi tube 3, it is sufficient to introduce the end 12 into the Venturi tube 3, until said protrusion 8 enters the first portion 10 of the slot 9, and then rotate the extension element 6 so that said protrusion 8 enters the second section 11 of the slot 9, locking in position the extension element 6 in the Venturi tube 3. In order to separate the extension element 6 from the Venturi tube 3 it is sufficient to execute the above-described operations in a reversed order.

Claims

1. Burner (1), with natural or forced suction, comprising a burner body (2), into which a mixture of fuel and air is introduced, said body (2) being provided with openings (4) for the flow and subsequent combustion of said mixture and comprising a Venturi tube (3) into which a jet of said fuel is introduced under pressure and extension means (6) for said Venturi tube (3), characterized in that said extension means (6) is removably coupled with said Venturi tube (3).
2. Burner (1) according to claim 1 , wherein said extension means (6) is coupled to said Venturi tube (3) by means of interference coupling, the measure of said interference being chosen so as to assure stability of the coupling and allow a removal even manual of said extension means (6).
3. Burner (1) according to claim 1 , wherein said extension means (6) is coupled to said Venturi tube (3) through fastening means (8, 9).
4. Burner (1) according to claim 3, wherein said fastening means (8, 9) includes a protrusion (8) provided on the internal surface of said Venturi tube (3) and an open slot (9) provided at an end of said extension means (6).
5. Burner (1) according to claim 4, wherein said open slot (9) includes a first portion (10) substantially rectilinear and substantially parallel to a longitudinal axis of said extension means (6).
6. Burner (1) according to claim 5, wherein said open slot (9) includes a second portion (11) consecutive to said first portion (10) and forming an angle with it.
7. Burner (1) according to claim 6, wherein said angle has an amplitude of about 90°.
EP01949031A 2000-02-04 2001-02-05 Burner with an extension of the venturi tube Expired - Lifetime EP1252466B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITMO000014 2000-02-04
IT2000MO000014A IT1315590B1 (en) 2000-02-04 2000-02-04 BURNER WITH VENTURI TUBE EXTENSION.
PCT/IB2001/000141 WO2001057437A1 (en) 2000-02-04 2001-02-05 Burner with an extension of the venturi tube

Publications (2)

Publication Number Publication Date
EP1252466A1 true EP1252466A1 (en) 2002-10-30
EP1252466B1 EP1252466B1 (en) 2005-10-19

Family

ID=11450339

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01949031A Expired - Lifetime EP1252466B1 (en) 2000-02-04 2001-02-05 Burner with an extension of the venturi tube

Country Status (9)

Country Link
US (1) US20030096205A1 (en)
EP (1) EP1252466B1 (en)
AT (1) ATE307320T1 (en)
AU (1) AU2001228743A1 (en)
DE (1) DE60114148T2 (en)
HU (1) HUP0300116A2 (en)
IT (1) IT1315590B1 (en)
PL (1) PL356580A1 (en)
WO (1) WO2001057437A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103477151B (en) * 2010-12-01 2015-09-09 A.O.史密斯公司 For the low NO of water heater xburner
IT201700079548A1 (en) * 2017-07-14 2019-01-14 Ariston Thermo Spa ADAPTER COLLAR FOR A TUBULAR BURNER OF A GAS WATER HEATER
CN109595557A (en) * 2018-09-26 2019-04-09 中山市恒乐电器有限公司 A kind of low-NOx combustor for water heater

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1279935A (en) * 1918-05-24 1918-09-24 W T Sweat Safety pipe-joint.
US3567137A (en) * 1969-08-29 1971-03-02 Carrier Corp Gas burner
GB1337121A (en) * 1970-11-30 1973-11-14 Airoil Burner Fuel burner assemblies
GB1502104A (en) * 1975-08-12 1978-02-22 Trapp C Gas burners
US4679544A (en) * 1983-11-04 1987-07-14 Modern Home Products Corp. Threaded adjustable gas intake assembly
US4773384A (en) * 1983-11-04 1988-09-27 Modern Home Products Corp. Adjustable gas intake assembly
US4478205A (en) * 1983-11-04 1984-10-23 Modern Home Products Corp. Dual adjustable gas intake assembly
US4586483A (en) * 1984-06-29 1986-05-06 Manuel Perez Adjustable dual venturi assembly
US4686957A (en) * 1984-10-30 1987-08-18 Modern Home Products Corp. Gas nozzle attachment
US4597733A (en) * 1985-02-14 1986-07-01 Alvin Dean Gas heating system for dehydrators and the like
US5355908A (en) * 1986-01-15 1994-10-18 Hiltap Fittings, Ltd. Reusable pipe union assembly with automatic fluid flow checking
TW257830B (en) * 1994-03-30 1995-09-21 Port O Kiln Aust Pty Ltd A burner
US5743727A (en) * 1997-01-21 1998-04-28 Burner Systems International, Inc. Premixed gas burner

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0157437A1 *

Also Published As

Publication number Publication date
DE60114148T2 (en) 2006-07-06
AU2001228743A1 (en) 2001-08-14
IT1315590B1 (en) 2003-03-14
ITMO20000014A1 (en) 2001-08-04
PL356580A1 (en) 2004-06-28
ATE307320T1 (en) 2005-11-15
DE60114148D1 (en) 2006-03-02
US20030096205A1 (en) 2003-05-22
HUP0300116A2 (en) 2003-06-28
EP1252466B1 (en) 2005-10-19
WO2001057437A1 (en) 2001-08-09

Similar Documents

Publication Publication Date Title
MY141577A (en) Premixing burner arrangement for operating a burner chamber and method for operating a burner chamber
EP1193447A3 (en) Multiple injector combustor
EP0769657A3 (en) Low emissions combustor premixer
EP1058063A1 (en) Liquid fuel injector for burners in gas turbines
JP2008534903A (en) Premix burner used in gas turbine combustor
CA2391757A1 (en) Burner fuel mixer head for concurrently burning two gaseous fuels
GB1368536A (en) Portable heater
EP1321715A3 (en) Improved combination of a premixing chamber and a combustion chamber, with low emission of pollutants, for gas turbines running on liquid and/or gas fuel
US20030096205A1 (en) Burner with an extension of the venturi tube
EP0829679A3 (en) Fuel/air supply assembly for gas burners
US3737281A (en) Fuel mixing shroud for heating torches
HK1056599A1 (en) Low noise modular blade burner
JPH0330050B2 (en)
DE9006308U1 (en)
SU643719A1 (en) Burner
JP3639399B2 (en) Natural suction low NOx burner
CN218972654U (en) Simple burner
CN211372399U (en) Premixing low-nitrogen combustor
KR100261497B1 (en) Burner for gas turbine
RU2001124100A (en) FUEL AIR BURNER OF THE COMBUSTION CHAMBER OF A GAS TURBINE ENGINE
JP2759402B2 (en) Premix burner device
KR200155551Y1 (en) Nozzle for lpg and lng in gas equipment
RU31836U1 (en) Burner
KR950007902Y1 (en) Nozzle
KR200159200Y1 (en) Air inhalation manifold structure for a car

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20020730

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17Q First examination report despatched

Effective date: 20040219

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20051019

Ref country code: LI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20051019

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20051019

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20051019

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20051019

Ref country code: CH

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20051019

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060119

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060119

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060119

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060205

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060206

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060228

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060228

REF Corresponds to:

Ref document number: 60114148

Country of ref document: DE

Date of ref document: 20060302

Kind code of ref document: P

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060320

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20060720

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20060205

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

EN Fr: translation not filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20061208

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20051019

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20051019

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20051019

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080205

PGRI Patent reinstated in contracting state [announced from national office to epo]

Ref country code: IT

Effective date: 20110616

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20120223

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20130124

Year of fee payment: 13

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 60114148

Country of ref document: DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 60114148

Country of ref document: DE

Effective date: 20140902

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140902

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140205