EP0042193A1 - Process and spraying device for the filling of hollow spaces - Google Patents

Process and spraying device for the filling of hollow spaces Download PDF

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Publication number
EP0042193A1
EP0042193A1 EP81200645A EP81200645A EP0042193A1 EP 0042193 A1 EP0042193 A1 EP 0042193A1 EP 81200645 A EP81200645 A EP 81200645A EP 81200645 A EP81200645 A EP 81200645A EP 0042193 A1 EP0042193 A1 EP 0042193A1
Authority
EP
European Patent Office
Prior art keywords
stream
spraying device
section
primary air
air stream
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
EP81200645A
Other languages
German (de)
French (fr)
Other versions
EP0042193B1 (en
Inventor
Gerardus Joseph Lambertus Smeets
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.)
Handelsmaatschappij Gesolan Na Nv
Original Assignee
Handelsmaatschappij Gesolan Na Nv
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 Handelsmaatschappij Gesolan Na Nv filed Critical Handelsmaatschappij Gesolan Na Nv
Priority to AT81200645T priority Critical patent/ATE9829T1/en
Publication of EP0042193A1 publication Critical patent/EP0042193A1/en
Application granted granted Critical
Publication of EP0042193B1 publication Critical patent/EP0042193B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1481—Spray pistols or apparatus for discharging particulate material
    • B05B7/1486—Spray pistols or apparatus for discharging particulate material for spraying particulate material in dry state
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F21/00—Implements for finishing work on buildings
    • E04F21/02—Implements for finishing work on buildings for applying plasticised masses to surfaces, e.g. plastering walls
    • E04F21/06—Implements for applying plaster, insulating material, or the like
    • E04F21/08—Mechanical implements
    • E04F21/085—Mechanical implements for filling building cavity walls with insulating materials
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F21/00—Implements for finishing work on buildings
    • E04F21/02—Implements for finishing work on buildings for applying plasticised masses to surfaces, e.g. plastering walls
    • E04F21/06—Implements for applying plaster, insulating material, or the like
    • E04F21/08—Mechanical implements
    • E04F21/12—Mechanical implements acting by gas pressure, e.g. steam pressure

Definitions

  • the invention relates to a process and a spraying device for the filling of hollow spaces by the injection of solid substances in the form of fibres or granules, such as glass wool, rock wool, synthetic polymers and other substances that are suitable for the said purpose.
  • spraying devices for this purpose were of such dimensions that large apertures had to be made in the wall in order to permit injection with a reasonable spraying quality, among other things.
  • Spraying devices are known with which injection through smaller apertures can be effected, because they have considerably smaller effective free passage on the exit side than on the inlet side for the substances to be injected.
  • Flocculation may occur, resulting in non-uniform distribution of the injected substance over the cavity, so that in the one hand the level of the K value is adversely affected and on the other hand the K value is not the same throughout the entire cavity but shows variations.
  • the flakes of fibrous material are torn apart by the turbulent motion, making- it possible to attain very low bulk densities, for instance of about 30 kg/m 3 .
  • the primary air pressure is preferably between 1.1 and 1.5 bar (abs.), and the secondary air pressure between 2 and 10 bar (abs.), in particular approximately 5 bar (abs.).
  • the process according to the invention permits considerably higher rates of filling than were customary up to now, for instance in the order of 2.5 - 3.5 kg/min.
  • the invention also relates to a spraying device for conducting the process described hereinbefore.
  • the spraying device consists of a supply section.and an outlet section, the supply section having an inlet pipe which has a substantially conical longitudinal section and a round cross-section; on a level with the smallest pipe diameter the supply section merges into anannular organ which is provided on its outer circumference with grooves crossing the long axis of the inlet pipe at an angle ⁇ .
  • the figure depicts a longitudinal section through the spraying device.
  • the spraying device comprises the supply section 1 having a passage 2.
  • the largest diameter of the passage 2 is at the end 3 where the substance to be injected is introduced in the direction of the arrow together with the primary compressed air.
  • the supply section 1 merges into an annular 4 which is provided on its outer circumference with the grooves 5 set at an angle pC to the axis of the spraying device.
  • the width of the angle ⁇ is between 5 and 15° and is preferably about ten degrees.
  • the outlet section is composed of the nozzle 61 which is detachably connected, for instance by means of a screw thread 62, to the coupling piece 63.
  • This coupling piece is in its turn detachably connected, for instance by means of a screw thread 12, to the supply section 1.
  • an annular space is left for an air chamber 8 which communicates with an aperture 9 for the supply of secondary air.
  • the air chamber 8 communicates by way of the grooves 5 of the annular organ 4 with the passage 7 of the nozzle 61.
  • the material to be injected is fed by means of the primary .- compressed air into the inlet pipe 2 at the end 3 passes through the aperture of the annular organ 4 to reach the passage 7 of the nozzle 61.
  • secondary air is fed in through the aperture 9 and also finds its way to the passage 7 by way of the air chamber 8 and the grooves 5.
  • the secondary air is introduced tangentially into passage 7 through the grooves set at the angle ⁇ , so that a uniform distribution of the substance to be injected and, in consequence a uniform distribution throughout the cavity is achieved.
  • the uniform distribution can be promoted still further by the provision of rifles and lands in the part of the passage 7 that is located between the nozzle tip of the outlet section and the annular organ 4.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Nozzles (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Catching Or Destruction (AREA)

Abstract

A process and a spraying device for the filling of hollow spaces by the injection of solid substances in the form of fibres or granules with the aid of an air stream, wherein the solid substance is supplied as a suspension in a stream of primary air, which stream is, just before entering the space to be filled, mixed with an annular stream of secondary air moving roughly coaxially with the primary air stream, the secondary air stream being supplied tangentially relative to the primary air stream and under a pressure exceeding the primary air pressure, and wherein the spraying device consists of a supply section (1) and an outlet section, of which the supply section is provided with an inlet pipe (2) which has a substantially conical longitudinal section and a round cross-section, while the said supply section merges on a level with the smallest pipe diameter into an annular organ (4) which is provided on its outer circumference with grooves (5) crossing the long axis of the inlet pipe at an angle a.

Description

  • The invention relates to a process and a spraying device for the filling of hollow spaces by the injection of solid substances in the form of fibres or granules, such as glass wool, rock wool, synthetic polymers and other substances that are suitable for the said purpose.
  • Numerous processes are known for the filling of hollow spaces, for example the filling of cavity walls with materials for thermal insulation. As a rule, the insulating substance is introduced into the cavity in an air stream with the aid of a spraying device.
  • Initially, spraying devices for this purpose were of such dimensions that large apertures had to be made in the wall in order to permit injection with a reasonable spraying quality, among other things.
  • Spraying devices are known with which injection through smaller apertures can be effected, because they have considerably smaller effective free passage on the exit side than on the inlet side for the substances to be injected.
  • The reduction of the effective free passage has a number of disadvantages of which a few are mentioned hereinafter.
    • - The spraying capacity, by which isunderstood the quantity of substance injected per unit time, is low.
    • - Blockages occur in the spraying device, especially during the injection of fibrous materials such as, for instance, glass wool and rock wool.
    • - The low capacity and the disturbances due to blockages increase expenses, because injection takes longer.
  • Flocculation may occur, resulting in non-uniform distribution of the injected substance over the cavity, so that in the one hand the level of the K value is adversely affected and on the other hand the K value is not the same throughout the entire cavity but shows variations.
  • It has now been found that a better and more uniform filling can be obtained by supplying the solid substance as a suspension in a primary air stream, which stream is mixed, just before entering the space to be filled, with an annular stream of secondary air moving roughly coaxially with the primary air stream, the secondary air stream being supplied tangentially relative to the primary air stream and under a pressure exceeding the primary air pressure.
  • Because of the tangential introduction of secondary air into the primary air stream, a highly turbulent flow is created immediately before the entry into the cavity to be filled.
  • When material in the form of fibres, such as glass wool or slag wool, is used in the process according to the invention the flakes of fibrous material are torn apart by the turbulent motion, making- it possible to attain very low bulk densities, for instance of about 30 kg/m3.
  • The primary air pressure is preferably between 1.1 and 1.5 bar (abs.), and the secondary air pressure between 2 and 10 bar (abs.), in particular approximately 5 bar (abs.).
  • The process according to the invention permits considerably higher rates of filling than were customary up to now, for instance in the order of 2.5 - 3.5 kg/min.
  • The invention also relates to a spraying device for conducting the process described hereinbefore.
  • According to the invention the spraying device consists of a supply section.and an outlet section, the supply section having an inlet pipe which has a substantially conical longitudinal section and a round cross-section; on a level with the smallest pipe diameter the supply section merges into anannular organ which is provided on its outer circumference with grooves crossing the long axis of the inlet pipe at an angle α.
  • The invention is elucidated further by reference to an example shown in the attached drawing.
  • The figure depicts a longitudinal section through the spraying device. The spraying device comprises the supply section 1 having a passage 2. The largest diameter of the passage 2 is at the end 3 where the substance to be injected is introduced in the direction of the arrow together with the primary compressed air. At the smallest diameter of passage 2 the supply section 1 merges into an annular 4 which is provided on its outer circumference with the grooves 5 set at an angle pC to the axis of the spraying device. The width of the angle α is between 5 and 15° and is preferably about ten degrees.
  • The outlet section is composed of the nozzle 61 which is detachably connected, for instance by means of a screw thread 62, to the coupling piece 63. This coupling piece is in its turn detachably connected, for instance by means of a screw thread 12, to the supply section 1. Between the supply section 1 and the coupling piece 63 an annular space is left for an air chamber 8 which communicates with an aperture 9 for the supply of secondary air.
  • The air chamber 8 communicates by way of the grooves 5 of the annular organ 4 with the passage 7 of the nozzle 61. The material to be injected is fed by means of the primary .- compressed air into the inlet pipe 2 at the end 3 passes through the aperture of the annular organ 4 to reach the passage 7 of the nozzle 61. At the same time, secondary air is fed in through the aperture 9 and also finds its way to the passage 7 by way of the air chamber 8 and the grooves 5.
  • As the secondary compressed air is supplied under a higher pressure than the primary compressed air, a pressure below atmospheric is produced in the passage 2 so that the material to be injected can move readily towards the annular organ 4 and clogging of the passage 2 is prevented.
  • In addition, the secondary air is introduced tangentially into passage 7 through the grooves set at the angle α, so that a uniform distribution of the substance to be injected and, in consequence a uniform distribution throughout the cavity is achieved.
  • The uniform distribution can be promoted still further by the provision of rifles and lands in the part of the passage 7 that is located between the nozzle tip of the outlet section and the annular organ 4.

Claims (8)

1. A process for the filling of hollow spaces by the injection of solid substances in the form of fibres or granules with the aid of an air stream, characterized in that the solid substance is supplied as a suspension in a stream of primary air, which stream is, just before entering the space to be filled, mixed with an annular stream of secon- de-y air moving roughly coaxially with the primary air stream, the secondary air stream being supplied tangentially relative to the primary air stream and under a pressure exceeding the primary air pressure.
2. A process according to claim 1, characterized in that the secondary air stream is mixed with the primary air stream in such a fashion that a highly turbulent flow is created immediately before the entry into the cavity to be filled.
3. A process according to either one of claimes 1 or 2, characterized in that the primary air pressure is between 1.1 and 1.5 bar (abs.) and the secondary air pressure between 2 and 10 bar (abs.).
4. A spraying device for conducting the process according to any one of claims 1-3, characterized in that it consists of a supply section (1) and an outlet section, of which the supply section is provided with an inlet pipe which has a substantially conical longitudinal section and a round cross-section, while the said supply section merges on a level with the smallest pipe diameter into an annular organ which is provided on its outer circumference with grooves crossing the long axis of the inlet pipe at an angle α.
5. A spraying device according to claim 4, characterized in that the width of the angle α is between 5 and 15 degrees.
6. A spraying device according to either one of claims 4 and 5, characterized in that the supply section is attached to the outlet section in such a fashion that an air chamber is formed between the two sections.
7. A spraying device according to any one of claims 4-6, characterized in that the air chamber communicates on the one hand with an aperture for the supply of secondary air and on the other with the passage of the outlet section through the grooves of the ring-shaped organ.
8. A spraying device according to any one of claims 4-7, characterized in that the outlet section is composed of a nozzle which is detachably connected to a coaxially located coupling piece.
EP81200645A 1980-06-17 1981-06-12 Process and spraying device for the filling of hollow spaces Expired EP0042193B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81200645T ATE9829T1 (en) 1980-06-17 1981-06-12 METHOD AND SPRAYING DEVICE FOR FILLING A VACUUM.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE1/9851A BE883848A (en) 1980-06-17 1980-06-17 NOZZLE
BE1009851 1980-06-17

Publications (2)

Publication Number Publication Date
EP0042193A1 true EP0042193A1 (en) 1981-12-23
EP0042193B1 EP0042193B1 (en) 1984-10-10

Family

ID=3862912

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81200645A Expired EP0042193B1 (en) 1980-06-17 1981-06-12 Process and spraying device for the filling of hollow spaces

Country Status (5)

Country Link
EP (1) EP0042193B1 (en)
AT (1) ATE9829T1 (en)
BE (1) BE883848A (en)
DE (1) DE3166576D1 (en)
DK (1) DK259781A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2573328A1 (en) * 1984-11-19 1986-05-23 Riedel Paul Device for injecting a loose fibrous or granulated product into a cavity
FR2947466A1 (en) * 2009-07-06 2011-01-07 Isol Finance Sa Fibrous or moistened pulverulent composition discharging device for e.g. cavities of buildings, has air injection unit for injecting air inside portion of transport conduit arranged between foam injection unit and discharge nozzle
CN105637109A (en) * 2013-12-11 2016-06-01 黑崎播磨株式会社 Thermal spraying device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH320682A (en) * 1954-07-30 1957-04-15 Parisienne Outillage Apparatus for spraying a plastic material by means of a compressed fluid
DE1232731B (en) * 1960-05-27 1967-01-19 Goodyear Aerospace Corp Spray nozzle for spraying a mixture of air, resin and fibers
FR2302789A1 (en) * 1975-03-06 1976-10-01 Campenon Bernard Sa Additive injector for concrete pump - has liquid accelerator mixed with compressed air and fed through sloping channels around jet
DE2641195A1 (en) * 1976-09-14 1978-03-16 Schlecht Karl Multi-component discharge and mixing nozzle - has ring of air jets discharging onto flexible ring at end of mixer chamber
GB2012620A (en) * 1978-01-24 1979-08-01 British Petroleum Co Method of filling a cavity
FR2416786A1 (en) * 1978-02-13 1979-09-07 Lezier Gerard Low pressure air nozzles for expanded polystyrene bead injection - for much lower energy requirements than high pressure air injection systems

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7905637A (en) * 1979-07-20 1981-01-22 Ronald Barend Van Santbrink Method for filling the cavity of a cavity wall with insulating material.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH320682A (en) * 1954-07-30 1957-04-15 Parisienne Outillage Apparatus for spraying a plastic material by means of a compressed fluid
DE1232731B (en) * 1960-05-27 1967-01-19 Goodyear Aerospace Corp Spray nozzle for spraying a mixture of air, resin and fibers
FR2302789A1 (en) * 1975-03-06 1976-10-01 Campenon Bernard Sa Additive injector for concrete pump - has liquid accelerator mixed with compressed air and fed through sloping channels around jet
DE2641195A1 (en) * 1976-09-14 1978-03-16 Schlecht Karl Multi-component discharge and mixing nozzle - has ring of air jets discharging onto flexible ring at end of mixer chamber
GB2012620A (en) * 1978-01-24 1979-08-01 British Petroleum Co Method of filling a cavity
FR2416786A1 (en) * 1978-02-13 1979-09-07 Lezier Gerard Low pressure air nozzles for expanded polystyrene bead injection - for much lower energy requirements than high pressure air injection systems

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2573328A1 (en) * 1984-11-19 1986-05-23 Riedel Paul Device for injecting a loose fibrous or granulated product into a cavity
FR2947466A1 (en) * 2009-07-06 2011-01-07 Isol Finance Sa Fibrous or moistened pulverulent composition discharging device for e.g. cavities of buildings, has air injection unit for injecting air inside portion of transport conduit arranged between foam injection unit and discharge nozzle
CN105637109A (en) * 2013-12-11 2016-06-01 黑崎播磨株式会社 Thermal spraying device

Also Published As

Publication number Publication date
DK259781A (en) 1981-12-18
ATE9829T1 (en) 1984-10-15
BE883848A (en) 1980-10-16
EP0042193B1 (en) 1984-10-10
DE3166576D1 (en) 1984-11-15

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