EP2605961B1 - Device for sandblasting uses exhaust gas from a jet engine for blasting - Google Patents

Device for sandblasting uses exhaust gas from a jet engine for blasting Download PDF

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Publication number
EP2605961B1
EP2605961B1 EP11783103.2A EP11783103A EP2605961B1 EP 2605961 B1 EP2605961 B1 EP 2605961B1 EP 11783103 A EP11783103 A EP 11783103A EP 2605961 B1 EP2605961 B1 EP 2605961B1
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EP
European Patent Office
Prior art keywords
heat gun
engine
gun according
nozzle
cleaning
Prior art date
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Active
Application number
EP11783103.2A
Other languages
German (de)
French (fr)
Other versions
EP2605961A4 (en
EP2605961A2 (en
Inventor
Bo Winterskov
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Individual
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Individual
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Publication of EP2605961A2 publication Critical patent/EP2605961A2/en
Publication of EP2605961A4 publication Critical patent/EP2605961A4/en
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Publication of EP2605961B1 publication Critical patent/EP2605961B1/en
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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
    • F23D14/34—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/024—Cleaning by means of spray elements moving over the surface to be cleaned
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00—Cleaning by methods involving the use of air flow or gas flow
    • B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials

Definitions

  • the invention relates to a tool for surface treatment by cleaning and drying of surfaces, joints and the like, where the intention is to remove weathering, wear or unintentionally added coating prior to further surface treatment, if any.
  • This is achieved in accordance with the invention by using a heat gun for the cleaning and heat treatment of surfaces, joints and the like using hot blast air generated by a turbojet engine, with an engine jacket with an injector for admixture of a cleaning medium which is discharged through an exhaust nozzle, and where the intake air is supplied to the engine through a filter unit.
  • the known technique has all the requisite characteristics, but it is inexpedient to first employ heavyweight high-pressure systems powered by diesel or petrol engines, which discharge heat directly into the environment through their exhaust and cooling systems, and to then employ a second source of energy for subsequent heat treatment by gas burners supplied from pressurised gas systems, which, In addition to the drawback of handling and transporting "hazardous goods", now also constitute a serious security problem due to the risk of terrorism, which has led to the imposition of very severe security requirements and restrictions for workplaces which use and store gas in pressurised cylinders and tanks.
  • the present invention provides a heat gun according to claim 1.
  • the dependent claims refer to further embodiments of the invention.
  • the invention mentioned in the opening paragraph provides an effective tool for cleaning and heat treatment in one operation, whereby disadvantages of the known technique are remedied.
  • a lightweight jet engine in which a liquid fuel, such as, by way of example, petrol or diesel oil, is injected under electronic control into a compressed combustion chamber, out of which the exhaust air is discharged from the engine jacket with an aggregate injector for sand or similar cleaning medium, which is dosed and discharged through one or more exhaust nozzles to the surface to be cleaned.
  • the jet engine sucks in clean air through a dirt and noise reducing filter unit, which may be mounted directly on and around the engine unit, or be disposed at a distance from the cleaning area, supplying clean air through a system of hoses or the like.
  • the exhaust nozzle may be adapted for various tasks, for example narrow and pointed for depth treatment of joints and cracks, or flat and wide for surface treatment.
  • a heat gun may be constructed for simple manual operation, mounted on a lightweight frame or trolley, or a number of these may be mounted together on a self-propelled, manned or remote-controlled advancing arrangement.
  • Fig. 1 shows a heat gun with a lightweight jet engine mounted under an engine jacket 2, with an aggregate injector for admitting cleaning medium into the hot exhaust jet, which is discharged through an exhaust nozzle 1.
  • the intake air is passed through an air and noise filter unit 3, and the jet engine is controlled here by a control device disposed in a handle 4.
  • Everything is mounted here on a simple lightweight and mobile frame 14 with an armrest 5, where a fuel tank 6 and an aggregate container 7 are carried along on a lightweight trolley 8.
  • the heat gun is shown fitted with a ballast weight 9 and load-relieving and spacer wheels 10.
  • Fig. 2 shows a second embodiment of a heat gun with multiple engine units 2, with exhaust nozzles 1 and an intake filter 3, here mounted in an advancing arrangement 12 which can carry along fuel and aggregate materials
  • a self-propelled, manned or remote-controlled unit not shown.

Description

  • The invention relates to a tool for surface treatment by cleaning and drying of surfaces, joints and the like, where the intention is to remove weathering, wear or unintentionally added coating prior to further surface treatment, if any. This is achieved in accordance with the invention by using a heat gun for the cleaning and heat treatment of surfaces, joints and the like using hot blast air generated by a turbojet engine, with an engine jacket with an injector for admixture of a cleaning medium which is discharged through an exhaust nozzle, and where the intake air is supplied to the engine through a filter unit.
  • Mutually independent systems are often used in the methods known today for the cleaning and heat treatment of surfaces and items. First, cleaning is performed by a high-pressure system with water or air directly or with admixture of cleaning agents, such as, by way of example, sand, and subsequently heat treatment is performed with gas burners with a naked or indirect flame. In principle, the known technique has all the requisite characteristics, but it is inexpedient to first employ heavyweight high-pressure systems powered by diesel or petrol engines, which discharge heat directly into the environment through their exhaust and cooling systems, and to then employ a second source of energy for subsequent heat treatment by gas burners supplied from pressurised gas systems, which, In addition to the drawback of handling and transporting "hazardous goods", now also constitute a serious security problem due to the risk of terrorism, which has led to the imposition of very severe security requirements and restrictions for workplaces which use and store gas in pressurised cylinders and tanks.
  • It is known from patent publication GB 614725A to employ hot exhaust air generated by the exhaust of a jet engine, which, after being discharged through a pipe and hose system, is admitted to a work area where a dosing device for the admixture of sand or the like is added to an exhaust nozzle, which can thus clean by sandblasting.
  • By this system there will occur a significant noise from the jet engine which will require an incorporation of the plant in a noise reduced rind or cap, and from US 2003/0091950 A1 it is known to use a filter at the entrance of the burner.
  • The present invention provides a heat gun according to claim 1. The dependent claims refer to further embodiments of the invention.
  • The invention mentioned in the opening paragraph provides an effective tool for cleaning and heat treatment in one operation, whereby disadvantages of the known technique are remedied. This is achieved by use of a lightweight jet engine in which a liquid fuel, such as, by way of example, petrol or diesel oil, is injected under electronic control into a compressed combustion chamber, out of which the exhaust air is discharged from the engine jacket with an aggregate injector for sand or similar cleaning medium, which is dosed and discharged through one or more exhaust nozzles to the surface to be cleaned. The jet engine sucks in clean air through a dirt and noise reducing filter unit, which may be mounted directly on and around the engine unit, or be disposed at a distance from the cleaning area, supplying clean air through a system of hoses or the like. The exhaust nozzle may be adapted for various tasks, for example narrow and pointed for depth treatment of joints and cracks, or flat and wide for surface treatment.
  • When the exhaust jet is directed at an item to be cleaned, the exhaust nozzle will be affected strongly by an oppositely directed impact which will attempt to lift the nozzle off the item, and therefore, according to the invention, it may be expedient to use an adjustable ballast weight and spacer wheels to facilitate advance and to maintain a suitable distance between the nozzle and the item. A heat gun may be constructed for simple manual operation, mounted on a lightweight frame or trolley, or a number of these may be mounted together on a self-propelled, manned or remote-controlled advancing arrangement.
  • The invention will be explained more fully below with reference to the drawing, in which:
    • Fig. 1 shows a heat gun according to the invention for simple operation, with fuel and aggregate in a lightweight arrangement, which are admitted through hose connections not shown here.
    • Fig. 2 shows multiple heat guns mounted in an arrangement which may be mounted on a self-propelled, manned vehicle, or be advanced under remote control.
  • Fig. 1 shows a heat gun with a lightweight jet engine mounted under an engine jacket 2, with an aggregate injector for admitting cleaning medium into the hot exhaust jet, which is discharged through an exhaust nozzle 1. The intake air is passed through an air and noise filter unit 3, and the jet engine is controlled here by a control device disposed in a handle 4. Everything is mounted here on a simple lightweight and mobile frame 14 with an armrest 5, where a fuel tank 6 and an aggregate container 7 are carried along on a lightweight trolley 8. Here, the heat gun is shown fitted with a ballast weight 9 and load-relieving and spacer wheels 10.
  • Fig. 2 shows a second embodiment of a heat gun with multiple engine units 2, with exhaust nozzles 1 and an intake filter 3, here mounted in an advancing arrangement 12 which can carry along fuel and aggregate materials Here, everything is advanced and controlled from a self-propelled, manned or remote-controlled unit, not shown.

Claims (6)

  1. A heat gun for the cleaning and heat treatment of surfaces (13), joints and the like using hot blast air generated by a turbojet engine (11), with an engine jacket (2) with an injector for admixture of a cleaning medium which is discharged through an exhaust nozzle (1), and where the intake air is supplied to the engine (11) through a filter unit (3), characteriz ed by being set up on a lightweight frame (13,8) for manual advance.
  2. A heat gun according to claim 1, characterized in that the exhaust nozzle (1) is configured as a short wide nozzle for the cleaning and heat treatment of surfaces (13).
  3. A heat gun according to claim 1, characterized in that the exhaust nozzle (1) is configured as a long narrow nozzle for the treatment of cracks and joints.
  4. A heat gun according to claims 1- 3, characterized by an adjustable ballast weight (9), mounted to counteract lifting on application of force from the exhaust nozzle (1).
  5. A heat gun according to claims 1 - 4, characterized by being fitted with adjustable load-relieving and spacer wheels (10).
  6. A heat gun according to claim 1, characterized in that one or more engine jackets (2) with exhaust nozzles (1) are mounted in an advancing arrangement (12).
EP11783103.2A 2010-05-20 2011-05-18 Device for sandblasting uses exhaust gas from a jet engine for blasting Active EP2605961B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA201000441A DK201000441A (en) 2010-05-20 2010-05-20 Sandblasting apparatus uses exhaust gas from a jet engine for sandblasting
PCT/DK2011/000047 WO2011144210A2 (en) 2010-05-20 2011-05-18 Heating and cleaning apparatus for surface treatment

Publications (3)

Publication Number Publication Date
EP2605961A2 EP2605961A2 (en) 2013-06-26
EP2605961A4 EP2605961A4 (en) 2014-10-01
EP2605961B1 true EP2605961B1 (en) 2015-11-04

Family

ID=44992140

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11783103.2A Active EP2605961B1 (en) 2010-05-20 2011-05-18 Device for sandblasting uses exhaust gas from a jet engine for blasting

Country Status (5)

Country Link
US (1) US20130089824A1 (en)
EP (1) EP2605961B1 (en)
CN (1) CN103124674B (en)
DK (2) DK201000441A (en)
WO (1) WO2011144210A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2975168B1 (en) * 2011-05-13 2013-08-16 Sefmat HOT AIR GENERATING APPARATUS WITH IMPROVED IGNITION.
GB2524036A (en) * 2014-03-12 2015-09-16 Wallwork Cambridge Ltd Erosive wear testing apparatus and method
USD891473S1 (en) * 2014-04-22 2020-07-28 Bo Winterskov Shield for containing and distributing turbojet engine combustion exhaust
DE202015005988U1 (en) 2015-08-28 2015-10-26 Andreas Rupprecht Appliance with a single-jet jet engine for drying, heating and / or removing contaminants from traffic areas

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030091950A1 (en) * 2001-11-14 2003-05-15 Eclipse, Inc. Industrial gas burner package

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB614725A (en) * 1946-07-22 1948-12-22 Schori Metallising Process Ltd Improvements in or relating to sandblasting
US2610622A (en) * 1947-01-31 1952-09-16 Coggin Gray Burner mechanism
US2836036A (en) * 1953-10-27 1958-05-27 Star Co Fuel feeding and ignition means for pulse jet type hot gas or steam generator
US3173413A (en) * 1962-04-02 1965-03-16 Weyerhaeuser Co Pavement heater
US4625509A (en) * 1980-04-21 1986-12-02 Sheppard Sr Darrel J Combustion engine
US4855004A (en) * 1987-06-26 1989-08-08 Clements National Company Seam welding machine for thermoplastic material
CN2053133U (en) * 1989-10-06 1990-02-21 冶金工业部建筑研究总院 Self-suction-type light circulating sand ejector
US5285769A (en) * 1992-10-13 1994-02-15 Washington State University Research Foundation Aerosol generating rotary pulse-jet orchard heater
CN2198072Y (en) * 1994-06-28 1995-05-24 四川长平机械厂 Box type sand blasting machine
CN2260684Y (en) * 1996-05-10 1997-08-27 汪世学 Mould sand-blower
US6367469B1 (en) * 2000-03-23 2002-04-09 Zacho Bo Ravnsbaek Jet blaster device
CN2470399Y (en) * 2001-04-09 2002-01-09 中国人民解放军第5704工厂 Jet-type cleaning vehicle for airport path
CN101648196A (en) * 2009-09-11 2010-02-17 王鸿智 Blowing interface of blowing and sucking machine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030091950A1 (en) * 2001-11-14 2003-05-15 Eclipse, Inc. Industrial gas burner package

Also Published As

Publication number Publication date
WO2011144210A3 (en) 2012-05-03
CN103124674A (en) 2013-05-29
WO2011144210A9 (en) 2012-06-21
DK201000441A (en) 2011-11-21
EP2605961A4 (en) 2014-10-01
CN103124674B (en) 2016-03-30
DK2605961T3 (en) 2016-02-08
WO2011144210A2 (en) 2011-11-24
EP2605961A2 (en) 2013-06-26
US20130089824A1 (en) 2013-04-11

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