EP0149412A2 - Spritzvorrichtung zur Beschichtung des Inneren von eingebauten Treibstofftanks - Google Patents

Spritzvorrichtung zur Beschichtung des Inneren von eingebauten Treibstofftanks Download PDF

Info

Publication number
EP0149412A2
EP0149412A2 EP84630189A EP84630189A EP0149412A2 EP 0149412 A2 EP0149412 A2 EP 0149412A2 EP 84630189 A EP84630189 A EP 84630189A EP 84630189 A EP84630189 A EP 84630189A EP 0149412 A2 EP0149412 A2 EP 0149412A2
Authority
EP
European Patent Office
Prior art keywords
nozzle
spray
extension unit
nozzle tip
set forth
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Withdrawn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
EP84630189A
Other languages
English (en)
French (fr)
Other versions
EP0149412A3 (de
Inventor
Paul Elliott Liggett
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.)
Goodyear Aerospace Corp
Original Assignee
Goodyear Aerospace Corp
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 Goodyear Aerospace Corp filed Critical Goodyear Aerospace Corp
Publication of EP0149412A2 publication Critical patent/EP0149412A2/de
Publication of EP0149412A3 publication Critical patent/EP0149412A3/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/06—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies
    • B05B13/0627—Arrangements of nozzles or spray heads specially adapted for treating the inside of hollow bodies

Definitions

  • This invention relates to spraying apparatus and more particularly to a unique nozzle extension for use in combination with a spray gun to facilitate spraying of a polymeric material into an enclosed cavity to completely coat the interior surfaces thereof and thus form an integral leak-proof fuel container such as, for example, an in situ formed fuel tank.
  • While the invention is developed for spray- coating integral aircraft fuel tanks, ie, tanks in situ formed within the fuselage or wing cavities of an aircraft, it may also be applied to any other type vehicle including automotive type vehicles wherein the tanks are formed within the body framework of the vehicle.
  • Tanks of the type alluded to are made by various techniques wherein fuel resistant polymeric coatings are applied to reinforcement fabric, the fabric being firstly laid up onto a mold and/or mandrel which approximates the configuration of the cavity into which the tank is to be installed.
  • the volume capacity of a tank made according to this practice is determined by and dependent upon how closely one is able to make the tank fit the cavity configuration.
  • a nozzle extension unit for use in combination with a spray gun when dispensing a sprayable polymeric material into an enclosed cavity having limited accessibility
  • a nozzle tip including roll and yaw rotatable swivels, at least one filter screen element mounted in-line within the unit, and a length of flexible high pressure hose interconnecting the input connector to the nozzle tip.
  • Tanks of this type are formed within the framework of the wing structure and typically comprise a top plate 12, a bottom plate 14, and a plurality of walls 16 that interconnect the top plate to the bottom plate.
  • the walls 16 are attached to the top and bottom plates via a plurality of rivets 18 and/or bolt-and- nut fasteners 20 which extend through flange portions 16a of the wall 16.
  • a plurality of transversely extending walls 22 may also be included in the structural configuration and these will typically have a plurality of apertures 24 which decrease the weight of the structure as well as permit fuel to flow between various compartments formed by the intersecting walls 16 and 22.
  • Figure 1 is intended to illustrate the problem involved in attempting to seal the interior spaces of this type complex-shaped structure and, because access into the tank cavity is limited, it becomes an exercise in futility to attempt to spray-coat all surfaces within the cavity using conventional spraying equipment.
  • aircraft fuselage tanks are larger and provide somewhat greater access, fuel leakage from these tanks cannot be tolerated inasmuch as the control functions of the aircraft are located within the fuselage. Therefore, it is imperative that the tank does not leak when attempting to in situ form such tank within the fuselage cavity. For this reason, aircraft fuselage tanks have conventionally been made as separate units which are leak tested prior to their installation into the aircraft framework assembly.
  • the present invention provides a nozzle extension for attachment to and use with a state-of-the-art spraying apparatus which allows personnel to direct a fuel resistant polyurethane elastomer into the most inaccessible areas of an aircraft fuel tank cavity. More specifically, the invention provides a unique "spray finger" unit that duplicates the swivel motion of a person's wrist and therefore allows complete freedom of spraying motion within enclosed spaces such as within aircraft wing and fuselage tank cavities.
  • the apparatus forming the present inventive concept is illustrated in Figure 2 as it may be affixed to and operated in conjunction with a typical spray gun apparatus illustrated in ghost lines and generally indicated by reference numeral 26.
  • the spray gun 26 is adapted for receiving various chemical components and/or materials which comprise the composite of the finished fuel tank and these enter the gun at "A”, are controlled through a valve assembly at "B”, and exit through a nozzle at "C”.
  • the nozzle extension is generally indicated by reference numeral 100 and comprises a length of flexible high pressure hose 40 interconnecting a connector 30 at one end to the "spray finger" nozzle unit 50 at the opposite end. More particularly now with reference to Figure 3 of the drawings, the nozzle extension 100 is illustrated in an elevational view with various portions shown in longitudinal cross-section and, because of its overall length, the figure is separated into the three sections 30, 40, and 50 which are interconnected by a dot-dashed line 101 to indicate the manner of assembly. Dot-dashed line 101 is also the axis of rotation A of various in-line swivels forming an integral part of the unit 100 and these will be described more specifically hereinafter.
  • the connector 30 is such as to be readily attached to the output of the gun 26 at "C” and comprises a body 32 having a female threaded end 34 that threads onto the spray gun 26.
  • the opposite end comprises a male threaded nipple 36 that defines a bore or chamber 32a that carries a relatively course 50 mesh filter screen element 38 therein in an axially in-line positon within the chamber.
  • the screen element 38 also includes a washer end 38a which effects a seal at the output of the chamber 32a.
  • the filter screen effectively breaks up any large lumps of spray material that may exit through the spray gun 26.
  • the hose section 40 may be of any length and comprises a flexible, high pressure, wire-braided rubber hose 42 having an axially in-line swivel connector 44A at the input end of the hose and substantially similar in-line swivel connector 44B at the output end thereof.
  • the swivels 44A and 44B include female threaded nuts 46A and 46B and these are mounted on flanged nipple ends 48A and 48B respectively.
  • the swivels 44A and 44B are sealed by 0-ring seals 47A and 47B in a conventional manner.
  • Input swivel 44A further includes a second female threaded nut 49 that adapts to the male nipple 36 of the filter connector 30.
  • the swivel connectors 44A, 44B are conventional connections and eliminate kinking of the wire braid hose 42 when the hose section 40 is connected to the gun 26 and nozzle unit 50.
  • the output connecting nut 46B of the hose section 40 is adapted for threading engagement with a high pressure in-line axial swivel indicated by reference numeral 52.
  • the swivel 52 is a product of the Spraying Systems Company of Wheaton, Illinois.
  • the swivel 52 is a sealed unit and the specifics of the elements forming the swivel are not important for this description suffice to say that it is designed for swivel operation at high pressures.
  • the section 52 also includes a female threaded nut 54 at the output end that threads onto a second in-line filter connector 56.
  • the connector 56 comprises input and output threaded nipple ends 56A and 56B respectively.
  • the output end 56B defines an enlarged bore or filter screen chamber 56a that carries a screen element 58 therein in axial in-line position within the chamber 56a.
  • the screen element comprises a plurality of serially connected dises having openings therethrough of approximately 0.020 inch (.51 mm) and further includes a washer type end 58a that effects a sealing relationship with the end of the chamber in the usual manner.
  • the nozzle section 50 further comprises a "yaw swivel" generally indicated by reference numeral 80.
  • the swivel 80 comprises an upper or input body portion 60 that is connected in swivel relationship to a lower or output body portion 70.
  • the two body portions 60, 70 define chamber bores 60a and 70a respectively which have a common "yaw" swivel axis Ay.
  • the upper body portion 60 includes an input bore 62 that is defined by a flanged nipple 64 which carries a mounted female threaded nut 66 thereon for attachment to the nipple end 56B of the filter connector 56.
  • the lower body portion 70 includes an output bore 72 that is defined by a male threaded nipple end 74 which also defines a filter chamber 74a.
  • the upper input body portion 60 and lower output body portion 70 are joined at 76 such that the portion 70 swivels with respect to the body portion 60 about the "yaw" axis A.
  • the two body portions 60, 70 are maintained in their swivel relationship by a swivel bolt 82 that is captured in the bore 70a by its head portion 82a and in the bore 60a by a cap nut 84.
  • the cap nut 84 is threaded onto the end 82b of the bolt 82.
  • the swivel alignment of the bolt 82 is maintained in the upper body 60 by a flange 82c that also effectively seals that end of the bore 60a.
  • the upper and lower bores 60a and 70a are further pressure sealed by seals 68 and 78 respectively.
  • the output nipple 74 of the body portion 70 houses a combination filter screen/check valve element 88 which is axially positioned within the chamber 74a and it includes a washer end 88a that seals the output end of the chamber.
  • the element 88 comprises a 100-mesh screen 83 that encircles a ball check valve comprised of a spring that forces a ball to close off the output orifice at a predetermined low pressure.
  • An output tube 90 is connected to the yaw swivel 80 by a female threaded nut 92 which, when threaded onto the nipple 74, effects the seal as between the filter washer 88a and the end of the chamber 74a.
  • the tube 90 is bent to an angle " ⁇ " of approximately 120 degrees with respect to the rotational axis A and it includes a small nozzle tip 94 that is threadably received on the end of the tube.
  • the nozzle tip 94 comprises a nozzle disc 96 having a spray orifice and a seal disc 98 and this is a conventional arrangement.
  • the in-line high pressure swivel 52 provides rotation about the A r roll axis of the nozzle unit 50 while the swivel 80 provides rotation about the A y yaw axis.
  • the flexible hose 42 provides pitch motion ability about the A pitch axis.
  • in-line filter elements 38, 58, and 88 break up and/or filter out any pigment lumps that exist in a polyurethane cement as may be used for in situ formed fuel tanks. Such lumps have been a source of aggravation with conventional spraying equipment. Further, the check valve of the element 88 shuts off the flow of spray material at the nozzle tip 50 when the spray gun 26 is shut off and the internal pressure drops below a specific value. This shut off at the tip end of the unit 100 eliminates continued dripping of material out of the tip orifice 94 since the entire length of the nozzle extension unit 100 contains spray material.
  • While the invention may be used at pressures up to 4,000 psi, its best configuration includes a nozzle disc 96 having an orifice opening of about .009 inch (.23 mm) and operating at a pressure of about 900 psi.
  • This combination provides a very uniform coating of polyurethane cement.
  • other nozzle openings within the range of .005 to .020 inch (0.13 mm to 0.5 mm) may also be applied with attendant variations in the operating pressure and these will be determined by experience depending upon the type of material being dispensed through the apparatus.

Landscapes

  • Nozzles (AREA)
EP84630189A 1983-12-19 1984-12-11 Spritzvorrichtung zur Beschichtung des Inneren von eingebauten Treibstofftanks Withdrawn EP0149412A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US56277483A 1983-12-19 1983-12-19
US562774 1983-12-19

Publications (2)

Publication Number Publication Date
EP0149412A2 true EP0149412A2 (de) 1985-07-24
EP0149412A3 EP0149412A3 (de) 1986-04-23

Family

ID=24247721

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84630189A Withdrawn EP0149412A3 (de) 1983-12-19 1984-12-11 Spritzvorrichtung zur Beschichtung des Inneren von eingebauten Treibstofftanks

Country Status (2)

Country Link
EP (1) EP0149412A3 (de)
JP (1) JPS60112365U (de)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE859243C (de) * 1941-12-24 1952-12-11 Matra Werke Gmbh Hochdruck-Stahlrohrgelenkleitung
AT164210B (de) * 1948-03-17 1949-10-25 Franz Lozsek Gelenkstück
AT232811B (de) * 1960-08-04 1964-04-10 Walterscheid Kg Jean Schwenkverschraubung
DD114239A1 (de) * 1974-08-19 1975-07-20
US4247678A (en) * 1979-08-17 1981-01-27 The Goodyear Tire & Rubber Company Polyurethane derived from both an aliphatic dicarboxylic acid and an aromatic dicarboxylic acid and fuel container made therefrom
US4356091A (en) * 1980-10-06 1982-10-26 Caterpillar Tractor Co. Filtering and dampening apparatus
DE3221778A1 (de) * 1982-04-29 1983-11-03 Heinrich 6931 Zwingenberg Kübler Schmutzfaenger fuer fluessigkeitsdurchstroemte rohrleitungen

Also Published As

Publication number Publication date
EP0149412A3 (de) 1986-04-23
JPS60112365U (ja) 1985-07-30

Similar Documents

Publication Publication Date Title
EP1408270B1 (de) Schnell lösbare Flüssigkeitskupplungseinheit
DE2731601C2 (de)
US4655398A (en) Spraying apparatus for in situ formation of vehicle fuel tanks
EP0367001B1 (de) Treibstofftank zur Lagerung aggressiver Flüssigkeiten
CA2162179C (en) Paint system
DE69622298T2 (de) Elektrostatisches Beschichtigungssystem mit verbesserter Farbspritzpistole für leitfähige Lacke
DE69500857T2 (de) Luft- und Flüssigkeits-Schlauchsystem für eine Handspritzpistole
DE202014011108U1 (de) Dichtstrompumpe und Komponenten
DE2214446A1 (de) Pumpe
CA2330764C (en) Micro spray gun
US5931508A (en) Fluid coupling
DE19849043A1 (de) Sprühbehälter mit Innengewinde und mit drehbarem Schlauchanschluß
EP0149412A2 (de) Spritzvorrichtung zur Beschichtung des Inneren von eingebauten Treibstofftanks
CA1327447C (en) Coaxial paint hose and supply system
EP0475949B1 (de) Verbindungselement
EP0455109B1 (de) Verfahren und Anlage zum serienweisen Beschichten von Werkstücken mit leitfähigem Beschichtungsmaterial
DE10236266A1 (de) Wirbelpistole
EP0662598B1 (de) Hydraulische Fülleinrichtung und Verwendung der Fülleinrichtung zur Befüllung und Entlüftung von Waffen-Rohrbremsen und Waffen-Rohrvorholern
US4480791A (en) Sprayer apparatus
US5823438A (en) Recirculating paint system having improved fluid coupling assemblies
DE102021000192B3 (de) Kompakter Drehübertrager oder Drehdurchführung
EP1584376B1 (de) Verfahren zum Fördern eines Beschichtungsmaterials und Beschichtungsmaschine
WO2015149779A1 (de) Dichtelement für eine kupplungsglocke
JPS6331724Y2 (de)
SU869832A2 (ru) Установка дл нанесени покрыти

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: 19850104

AK Designated contracting states

Designated state(s): DE FR GB

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB

17Q First examination report despatched

Effective date: 19870220

D17Q First examination report despatched (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19871021

RIN1 Information on inventor provided before grant (corrected)

Inventor name: LIGGETT, PAUL ELLIOTT