EP3563088A1 - Torch with integral flashback arrestor and thermal shut-off device - Google Patents
Torch with integral flashback arrestor and thermal shut-off deviceInfo
- Publication number
- EP3563088A1 EP3563088A1 EP16925294.7A EP16925294A EP3563088A1 EP 3563088 A1 EP3563088 A1 EP 3563088A1 EP 16925294 A EP16925294 A EP 16925294A EP 3563088 A1 EP3563088 A1 EP 3563088A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- adaptor
- stem
- configuration
- passageway
- torch body
- 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- Withdrawn
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
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
- F23D14/82—Preventing flashback or blowback
-
- 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
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
- F23D14/82—Preventing flashback or blowback
- F23D14/825—Preventing flashback or blowback using valves
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C4/00—Flame traps allowing passage of gas but not of flame or explosion wave
- A62C4/02—Flame traps allowing passage of gas but not of flame or explosion wave in gas-pipes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/36—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/36—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position
- F16K17/38—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature
- F16K17/383—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature the valve comprising fusible, softening or meltable elements, e.g. used as link, blocking element, seal, closure plug
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/002—Actuating devices; Operating means; Releasing devices actuated by temperature variation
-
- 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
- F23D14/38—Torches, e.g. for brazing or heating
-
- 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
- F23D14/465—Details, e.g. noise reduction means for torches
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N3/00—Regulating air supply or draught
- F23N3/04—Regulating air supply or draught by operation of single valves or dampers by temperature sensitive elements
- F23N3/047—Regulating air supply or draught by operation of single valves or dampers by temperature sensitive elements using mechanical means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
- F23N5/04—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using bimetallic elements
- F23N5/047—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using bimetallic elements using mechanical means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
- F23N5/247—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using mechanical means
-
- 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
- F23D14/38—Torches, e.g. for brazing or heating
- F23D14/42—Torches, e.g. for brazing or heating for cutting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/14—Special features of gas burners
- F23D2900/14381—Single operating member opening and closing fuel and oxidant supply valves in torches
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2231/00—Fail safe
- F23N2231/16—Fail safe using melting materials or shape memory alloys
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2231/00—Fail safe
- F23N2231/28—Fail safe preventing flash-back or blow-back
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2241/00—Applications
- F23N2241/11—Torches
Definitions
- the present disclosure relates to cutting, welding, and heating devices and, more particularly, to cutting torches with flashback arrestors.
- Previous approaches for addressing flashback include the use of a sintered material within the torch to be used at the entry point of the gases into the torch. Although this stops the flashback from traveling upstream from the components that supply the gas to the torch, it disadvantageously does not eliminate the effects of flashback within the torch itself. As a result, the torch can still be damaged or the operator can be injured by flashback within the torch.
- packing material may be installed into the head of a torch or in a tube that is immediately upstream from the head for arresting flashback.
- this packing material may become damaged, such as by becoming clogged with carbon deposits resulting from flashback. As a result, the packing material must be periodically replaced.
- a check valve may be installed in each of the oxygen and fuel passageways to allow the oxygen and the fuel to flow in one direction, while preventing the reverse flow.
- Check valves are mechanical devices that may become unreliable when contaminated with dirt or debris, which can cause the check valve to leak. Moreover, the check valves cannot prevent flashback flame from propagating upstream once flashback occurs.
- a torch body may include a passageway, and a cartridge assembly disposed within the passageway.
- the cartridge assembly may include at least one of: a resettable pressure-sensitive device, and a thermal shut-off device, wherein the pressure-sensitive device and the thermal shut-off device are modifiable from a first configuration to a second configuration in response to a pressure or temperature gradient in the torch body, and wherein the second configuration restricts flow of a gas through the
- a torch body includes a passageway of the torch body, and a cartridge assembly disposed within the passageway.
- the cartridge assembly may include a number of different arrangements.
- the cartridge assembly may include a thermal shut-off combined with a flashback arrestor (e.g., a sintered filter/bushing) and, optionally, a check valve.
- the cartridge assembly may include a pressure sensitive switch combined with a check valve and, optionally, a flashback arrestor.
- the cartridge assembly may include a thermal shut off combined with a flashback arrestor, a pressure sensitive switch, and a check valve.
- the torch body 100 defines an oxygen passageway 102 and a fuel gas passageway 104, wherein the oxygen passageway 102 is configured to receive a flow of oxygen and the fuel gas passageway 104 is configured to receive a flow of gas during operation of the torch 101 (partially shown).
- the oxygen passageway 102 is configured to receive a flow of oxygen
- the fuel gas passageway 104 is configured to receive a flow of gas during operation of the torch 101 (partially shown).
- embodiments of the disclosure will only be discussed with respect to the oxygen side of the torch body for the sake of brevity.
- the fuel side may have identical components but with left-hand threads instead of right-hand threads.
- the proximal threaded portion 130 has an outside diameter and functions as a hose connector for connecting to an oxygen hose (not shown).
- the check valve 120 is open during normal operation of the torch, allowing oxygen to flow from the hose through the check valve 120 through the torch to the cutting tip. If a reverse flow situation develops, the check valve 120 is designed to close, in most instances, to reduce the possibility of reverse flow of gas from the torch handle into the hose.
- the sintered filter 124 of the flashback arrestor 1 10 is, in one form, a porous cylindrical body or bushing, and is formed by a sintering process.
- the sintered filter 124 defines a proximal end portion 135, a distal end portion 136, and a bore 138 extending therebetween.
- the bore 138 of the sintered filter 124 is in fluid communication with the bore 126 of the retainer 1 16.
- the sintered filter 124 may be press-fitted into the retainer 1 16 proximate the distal threaded portion 1 18 at the distal end of the retainer 1 16.
- the FBA 110 further includes a thermal shut-off device 140 modifiable from a first configuration to a second configuration in response to a pressure and/or temperature gradient in the torch body 100 so as to restrict flow of a fluid through the oxygen passageway 102 of the torch 101.
- the thermal shut- off device 140 includes a thermally reactive component, such as a thermal plug or a resettable bi-metallic strip, which changes state in response to a temperature gradient (e.g., a rapid increase caused by a flashback) to permit or restrict the flow of oxygen through the oxygen passageway 102 (FIG. 1).
- the thermal shut-off device 140 may be inserted into a cavity 172 of the oxygen passageway 102 of the torch body 100 until the adaptor 148 makes contact with an end wall 173 defining a distal portion of the cavity 172.
- the first section 154 of the adaptor 148 may have a diameter greater than that of the second section 158 of the adaptor 148, thus causing the first section 154 of the adaptor 148 to engage the rim 156 of the first section 161 of the guide 152, and allowing the second section 158 of the adaptor 148 to extend into the guide 152.
- the spring 157 is provided within an interior 184 of the stem 162, and engages the proximal end wall 180. During use, the spring 157 presses against the flange 165 of the stem 162, which in turn presses against the adaptor 148 via the thermal component 170. Specifically, the thermal component 170 and the second elongate member 168 are biased towards the central opening 144 of the adaptor 148. When present, the thermal component 170 separates the stem 162 from the adaptor 148, thereby preventing the second elongate member 168 from extending fully into the central opening 144 of the adaptor 148.
- the thermal component 170 is designed to melt, thus causing the thermal shut-off device 140 to transform to the second configuration (not shown) in which the second elongate member 168 is permitted to enter the central opening 144 and extend into a cavity 186 beyond the distal end of the adaptor 148.
- This causes a distal end surface 190 of the flange 165 of the stem 162 to cover the plurality of openings 142 through the adaptor 148, and the O-ring 166 of the stem 162 to move from a first position against the inner surface of the first sidewall section 181, as shown, to a second position against an inner sidewall surface 191 of the second section 158 of the adaptor 148.
- the O-ring 166 creates a seal with the inner sidewall surface 191, thereby preventing flow of gas through the plurality of openings 142 of the adaptor 148, and disabling the torch 101.
- the thermal shut-off device 140 is a solenoid valve in communication with an electronic switch.
- the solenoid valve may be disposed within the torch body 100, and the electronic switch is configured to send a signal to close the solenoid valve in the case a sensor operable with the electronic switch detects a flow of electrons above a predetermined temperature.
- the electronic switch may function in a similar fashion to the adaptor and stem described herein, but instead of a mechanical interface for preventing flow, the electronic switch senses the flow of electrons using, e.g., a thermocouple or thermopile, and sends a signal to shut down the solenoid valve provided in the torch flow path.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Gas Burners (AREA)
- Portable Nailing Machines And Staplers (AREA)
- Arc Welding In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US2016/069392 WO2018125187A1 (en) | 2016-12-30 | 2016-12-30 | Torch with integral flashback arrestor and thermal shut-off device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3563088A1 true EP3563088A1 (en) | 2019-11-06 |
EP3563088A4 EP3563088A4 (en) | 2020-08-05 |
Family
ID=62709888
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16925294.7A Withdrawn EP3563088A4 (en) | 2016-12-30 | 2016-12-30 | Torch with integral flashback arrestor and thermal shut-off device |
Country Status (8)
Country | Link |
---|---|
US (1) | US20190323709A1 (en) |
EP (1) | EP3563088A4 (en) |
CN (1) | CN110114615A (en) |
AU (1) | AU2016433829A1 (en) |
BR (1) | BR112019011368A2 (en) |
CA (1) | CA3046194A1 (en) |
MX (1) | MX2019007499A (en) |
WO (1) | WO2018125187A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110173693A (en) * | 2019-04-29 | 2019-08-27 | 宁波马斯特焊割具制造有限公司 | A kind of cutting torch |
EP4130573A1 (en) * | 2021-08-06 | 2023-02-08 | BDR Thermea Group B.V. | Exhaust non-return and suppressor valve |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1729880A1 (en) * | 1968-03-09 | 1971-07-08 | Draegerwerk Ag | Gas shut-off valve in non-return valves, especially in oxy-fuel systems |
CH543044A (en) * | 1970-09-30 | 1973-10-15 | Roth Alfred | Safety device on welding or cutting torches against overheating in the event of flashbacks |
DE2510972B2 (en) * | 1975-03-13 | 1980-06-26 | Hartmann & Braun Ag, 6000 Frankfurt | Flame-blocking device to be switched on in a gas pipe |
GB1496719A (en) * | 1975-04-18 | 1977-12-30 | Emerson Electric Co | Flashback arrestor |
JPS5918603B2 (en) * | 1977-11-05 | 1984-04-28 | 株式会社孝安産業 | Gas backflow/backfire emergency automatic stop device |
GB2056654A (en) * | 1979-08-16 | 1981-03-18 | Spirig Ernst | Gas flame torch apparatus |
GB2181530B (en) * | 1985-09-10 | 1989-08-16 | Butcher Brothers Limited | Flashback arrestor |
GB9223646D0 (en) * | 1992-11-11 | 1992-12-23 | Jenkins Trevor T | Flashback arrestor |
US5407348A (en) * | 1993-02-10 | 1995-04-18 | Victor Equipment Company | Torch with integral flashback arrestors and check valves |
CN1074333C (en) * | 1994-09-20 | 2001-11-07 | 亚历山大宾兹尔无限有限两合公司 | Arc welding torch or arc cutting torch |
JP4131435B2 (en) * | 2003-09-02 | 2008-08-13 | 株式会社三輝 | Dry gas safety device |
CN201306731Y (en) * | 2008-09-19 | 2009-09-09 | 内蒙古第一机械制造(集团)有限公司 | Dry-type oxyhydrogen flashback preventer |
CN202639582U (en) * | 2012-05-21 | 2013-01-02 | 蒋海翔 | Pressure relief valve assembly of portable gas braze welding gun |
US20140030666A1 (en) * | 2012-07-30 | 2014-01-30 | Victor Equipment Company | Flashback arrestor |
CN103090390A (en) * | 2012-12-27 | 2013-05-08 | 宁波市江北兴达焊割减压仪表厂 | Tempering-prevention cutting torch |
-
2016
- 2016-12-30 WO PCT/US2016/069392 patent/WO2018125187A1/en unknown
- 2016-12-30 EP EP16925294.7A patent/EP3563088A4/en not_active Withdrawn
- 2016-12-30 AU AU2016433829A patent/AU2016433829A1/en not_active Abandoned
- 2016-12-30 MX MX2019007499A patent/MX2019007499A/en unknown
- 2016-12-30 BR BR112019011368A patent/BR112019011368A2/en not_active Application Discontinuation
- 2016-12-30 CA CA3046194A patent/CA3046194A1/en not_active Abandoned
- 2016-12-30 CN CN201680091946.0A patent/CN110114615A/en active Pending
-
2019
- 2019-06-05 US US16/431,936 patent/US20190323709A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
CA3046194A1 (en) | 2018-07-05 |
EP3563088A4 (en) | 2020-08-05 |
WO2018125187A1 (en) | 2018-07-05 |
BR112019011368A2 (en) | 2019-10-15 |
CN110114615A (en) | 2019-08-09 |
MX2019007499A (en) | 2019-09-10 |
AU2016433829A1 (en) | 2019-08-22 |
US20190323709A1 (en) | 2019-10-24 |
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A4 | Supplementary search report drawn up and despatched |
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Ipc: F23D 14/82 20060101ALI20200702BHEP Ipc: F16K 17/38 20060101ALI20200702BHEP Ipc: F23D 14/72 20060101ALI20200702BHEP Ipc: F23N 5/24 20060101ALI20200702BHEP Ipc: F23N 3/04 20060101ALI20200702BHEP Ipc: F23D 14/38 20060101ALI20200702BHEP Ipc: A62C 4/02 20060101ALI20200702BHEP Ipc: F23D 14/46 20060101AFI20200702BHEP Ipc: F23N 5/04 20060101ALI20200702BHEP |
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