DE202008000090U1 - Injection arrangement for introducing an insulation - Google Patents

Abstract

arrangement for introducing an insulation by means of a pourable and inflatable insulation (2) in cavities (4) with a storage container (5) containing the pourable and inflatable insulation (2), a transport line (6) with a first end on or in the storage container and a second end (62) on the cavity (4), characterized that at the second end (62) of the transport line (6) has a Venturi nozzle (1) with a material passage (11), a delivery side (13), an introduction side (14) and a compressed air supply (15) with an air flow supply (16) having an inflow angle (α) to the longitudinal axis (L) of the Venturi nozzle (1), allowing the compressed air (3) to enter the material passage (11) causes a mass transport in the flow direction (X), is provided.

Description

The The invention relates to an arrangement for introducing an insulation by means of a pourable and inflatable insulation material in cavities with a storage container, containing the pourable and inflatable insulation material and a transport line having a first end on or in the storage container and a second end on the cavity.

Out the prior art are different delivery methods and arrangements known to be pourable and inflatable To introduce insulating materials into cavities.

typically, becomes a reservoir in which the pourable and inflatable insulation material in larger Quantities held in stock, put under pressure. Within This reservoir is an outlet with a connection provided for a transport line, wherein at the other End of the transport line provided a connection or a tip is to the floatable and inflatable insulation material to introduce into a cavity. The transport of the pourable and inflatable insulation material is made by the pressure, the is kept upright within the reservoir. This pressure pushes the pourable and inflatable insulation material through the transport line the place of delivery.

Problematic in the known arrangements and methods is that the reservoir has a limited size, which results in that the supply of the pourable and einblasbaren insulating material is very limited. A refilling of the reservoir is complicated, because once the pressure must be drained. To that is the constant replenishment of small ones Containers in the pressure vessel very time consuming. Further is the dust load for the operating personnel and the environment very high, which should also be avoided. Continue to exist not the ability to jump out of, for example, BigPacks or storage bags in which the pourable and inflatable insulation material is supplied, the pourable and to promote inflatable insulation, as these Do not subject containers to high pressure can be without destroying the containers become.

About that In addition, it is disadvantageous that the injection method under pressure placed reservoir due to the limited pressure resistance of the reservoir, its size as well the length of the transport line only a relatively small Press-fitting pressure can be applied to the cavity.

Further are blowing devices for cellulose insulating materials with discontinuous promotion of the insulating material from a pressure-free container known in which the separated small injection volume is set under delivery pressure. Also however, only a relatively low overpressure can occur here (maximum 300 mbar) are built.

Corresponding is the packing density of the pourable and inflatable Insulation material in the cavity is not sufficiently compacted, so it later to unwanted subsidence comes. As a result, there is a risk that the cavities will not be completely filled or after some time by Nachsacken the insulating material is no longer complete are filled. However, this is to be avoided since with the Insulation not completely filled cavity sections the desired insulation effect in this area clearly deteriorate. Partly poorly insulated ones form Areas inside the insulated building leading to dew formation and worst case mold can.

Of the present invention is based on the object, an arrangement show that makes it possible to pour and inflatable insulation material directly from the delivery containers and then directly into a cavity under strong pressure to bring.

Solved This object is achieved with an arrangement according to claim 1.

The fact that the pourable and einblasbare insulating material is conveyed by means of a Venturi nozzle, the insulating material can be conveyed out of the container and transported in the direction of Einbringungsortes. As a result, a pressurization of the container by the pourable and einblasbare insulating material is no longer necessary. Instead of exerting pressure on the free-flowing and inflatable insulation material to be conveyed in its container, it is sucked in by means of a suction within the venturi nozzle and thus transported at least through it. The suction within the Venturi nozzle, due to a mass flow of a pumped medium, causes a mass flow of the pourable and einblasbaren insulating material to be conveyed in the flow direction into the cavity. By adjusting the conveying medium pressure, a desired conveying and pressing pressure, which acts on the insulating material blown into the cavity, can be freely selected within wide ranges. Thus, a stronger pressurization is possible, so that a slightly compressible insulation, such as EPS beads with EPS milling, as in the German Utility Model 20 2006 018 200 Applicant is introduced under a sufficient pressure in the cavity.

The The arrangement described above is characterized by the fact that am second end of the transport line with a Venturi nozzle a material passage, a delivery side, an introduction side and a compressed air supply with an air flow supply with an inflow angle to the longitudinal axis of the Venturi nozzle, so that the compressed air when entering the material passage a Mass transport causes in the flow direction provided is.

If the free-flowing and inflatable insulation material injected directly into the cavity through the Venturi nozzle is, with the Venturi nozzle is applied directly to the cavity or penetrates, the pressure for introduction is the highest, because friction losses through another transport over a transport line can be avoided. Direct injection of the pourable and inflatable insulation material is by the direct concern or penetration of the Venturi nozzle on or into the cavity even more effective. There is a good compression of the pourable and inflatable insulation material within the cavity, thereby even an increase in the insulating value is achieved. For this it will be possible to get a better overall insulation value to achieve, since each volume introduced more insulation can be.

Around to optimize a mass flow of the fluid is Compressed air for pumping the pourable and inflatable insulation material in the Venturi nozzle supplied, wherein the supply of compressed air a directed parallel to and in the direction of flow Mass transport causes. In particular, here is the parallel to and in the direction of the flow direction facing component the flow for the mass flow of the pumped pourable and inflatable insulation material crucial in the direction of flow. One perpendicular to the flow direction directed or somehow spatially oriented component can be adjusted to cause turbulence within the Venturi nozzle comes through which amplifies the mass flow can be. Likewise, a speed increase of Mass flow of the pourable to be pumped and inflatable insulation possible, which in turn leads to an increased particle flow per unit time.

If the compressed air within the Venturi nozzle at the same time several points is supplied selectively, takes place reinforced and uniform transport of the promotional pourable and inflatable Insulating material across the entire bandwidth of the material passage. When fed via a single fluid feed the compressed air as the medium can only a small and not precisely directed mass flow of the pourable to be pumped and achieve inflatable insulation. However, when feeding over several places at the same time becomes the mass flow of the pumped medium more precise, directional and over the entire cross-section the material passage spatially distributed. This punctual Feeding over several places causes an optimal Suction and an associated strong mass flow of to be funded medium.

at Design of the Venturi nozzle as an annular Material passage, at least inside, it is advantageous if the compressed air within the Venturi nozzle annular fed around the longitudinal axis of the venturi nozzle becomes.

If the material passage is formed as a cone, wherein the cone becomes narrower in the flow direction in cross section, the Directed flow in the flow direction to one, and condensed to another. This leads to an increase the mass flow of the pourable to be pumped and inflatable insulation material in the direction of the Einbringungsortes.

Thereby, that the introduction side is formed as a tubular lance is, the mass flow of the pourable and inflatable insulation material through the tubular Lance be promoted through. Next, the lance to be used in the cavity in which the pourable and inflatable insulation material is to be introduced, penetrate. As a result, the pourable and inflatable Insulating material introduced directly into the cavity. The pressure is hardly reduced in this embodiment, since it is within the tubular lance no turbulence or pultrusion about which would slow down the flow of material. The lance can here be formed obliquely cut at the end, what a directed introduction of the pourable and inflatable insulation material comes into the cavity. Since the exit surface at an obliquely cut tubular lance located on an inclined plane points this has a larger outlet cross section, thereby a better distribution of the pourable and inflatable insulation material takes place within the cavity.

If the Venturi nozzle on the delivery side with the transport line is formed connectable, this can if necessary to the transport line be coupled. For cleaning, the Venturi nozzle be decoupled from the transport line. An exchange of the transport line with constipation of the same is fast feasible.

Characterized in that more than one air flow supply is provided for the passage of material, the mass flow of the pumped medium is optimized. It can thereby a larger amount to be funded conveyed and inflatable Dämmstoffes promoted and introduced at the point of entry.

Around an optimal intake of the pumpable pourable and to achieve einblasbaren insulation, there is the air flow supply for material passage of several individual holes, wherein this preferably annular around the longitudinal axis are arranged aligned. Especially when aligning the individual Holes in an array annular and symmetrical around the longitudinal axis of the mass flow of the pumped pourable and inflatable insulation material optimized, as such a uniform over the entire cross-section prevailing mass flow of the pumped medium formed.

If an annular insert provided in the material passage is, being on the outside of the annular Use a groove for receiving and even Distribution of the supplied compressed air is provided and Holes, which form the air flow supply, from the groove to the direction of flow directed lateral end of the insert are provided, one obtains an easy to produce Overall arrangement, very flexible by providing the insert is customizable. The use used is on the promoted pourable and inflatable insulation material adapted, so that a maximum of flow per unit time formed. Here is a variation in number and size, as well as in the spatial orientation of the holes possible. All three factors have an influence on the mass flow of the to be pumped and inflatable Insulation material.

Around an undesirable pressure relief and a mass backflow when stopping or interrupting the blowing process by compressed air shutdown To avoid, is a check valve in the flow direction before, behind or inside the venturi nozzle in the material passage arranged. The check valve is preferably designed such that at a pressure drop below a predetermined minimum pressure automatically closes. A reflux of the pourable Insulation against the flow direction is thus safely avoided. This will be the tight and if necessary compressed into the cavity introduced insulation material an interruption of the supply of material or at the end of the supply of material at this entry hole prevents it from loosening again and to relieve oneself.

Further allows the check valve a further compression the blown insulating material when the cavity is filled is and the mass flow stops because then the check valve closes and prevents pressure relief via the transport line. The pressure of the delivery air thus acts directly on the injected in the cavity insulation and compacts this further.

With the check valve can thus the desired maintain close packing density in the cavity and increased be, so that a Nachsacken the insulating material in the cavity and concomitant insulation-free sections are avoided. The cavity insulation is thus provided with a uniform, and increased compared to a loose pouring Insulation value created.

Next a pressure and / or flow inducing closing and opening the check valve may be the check valve also be designed to be actively actuated. Therefore, the check valve combined with both the control of compressed air supply, as well as be controlled separately. When arranging the check valve in the flow direction in front of or inside the Venturi nozzle, However, in the flow direction at least before the inlet of the The pumped medium can be used to control the check valve be closed, so as further feeding of example Compressed air which already located within the cavity insulation continue to compress, the higher the densities and related to achieve better insulation values.

Advantageous is in particular an embodiment of the check valve as a check valve. The non-return valve opens in the flow direction.

Further the check valve is completely sealing designed so that as described above when closed Non-return valve within the transport pipe a column from pourable and inflatable Insulation forms.

Thereby, that the inflow angle between air flow supply and longitudinal axis between 0 ° to 75 °, preferably 0 ° to 45 °, more preferably 0 ° to 15 °, the setting range is predetermined that when maintaining the angle range 0 ° to 75 ° turbulence possible and also wanted, so that by the swirling a mixing can take place, which is especially true for mixed insulation materials useful and sometimes necessary. In compliance with the angular range from 0 ° to 45 °, the turbulences are smaller, because the directed perpendicular to the flow direction component smaller than at large angles. In particular, the angular range from 0 ° to 15 °, because in this area achieved the highest production volumes and at the same time still individual turbulence occur.

Hereinafter, an embodiment the invention described in detail with reference to the accompanying drawings.

In this shows:

1 a schematic representation of the introduction arrangement.

In 1 is a schematic representation of an embodiment of the Venturi nozzle 1 shown. Here is the venturi nozzle 1 along the longitudinal axis L, wherein the Venturi nozzle 1 a material passage 11 which is spanned by a housing, and is provided with a flow direction X. The material passage 11 has a sponsorship page 13 and an insertion side 14 , where the production side 13 the side is on which the venturi nozzle 1 an insulating material 2 sucks and the introduction side 14 that side is on which the venturi nozzle 1 the subsidized insulation material 2 through the material passage 11 through into a cavity 4 introducing, whereby the transport of the insulating material 2 runs in the flow direction X.

On the production side 13 becomes the insulating material 2 via a transport line 6 promoted, the transport line 6 a first end and a second end 62 having. The first end, which is not shown here, is connected to a storage container, also not shown here. The storage container is for example a big pack. The second end 62 the transport line 6 is with the Venturi nozzle 1 on the production side 13 connected. The transport line 6 is designed as a suction line, so that this by the suction of the Venturi nozzle 1 does not coincide. Of course, the connections are each designed to be suction-tight, as well as any extension pieces that the transport line 6 can extend.

On the contribution side 14 is the venturi nozzle 1 on a double-shell masonry 7 consisting of a first wall 71 and a second wall 72 arranged adjacent or penetrating, being between the first wall 71 and the second wall 72 the cavity 4 forms. The venturi nozzle 1 is on the contribution side 14 as a tubular lance 141 with a tip 142 educated. This tubular lance 141 penetrates through a hole or opening 711 in the first wall 71 , For example, a first wall wall of the clam shell wall 7 in the cavity 4 such a thing that the top 142 at the place of introduction 41 empties. The summit 142 the tubular lance 141 is designed here as a bevelled tip. The bevel of the top 142 points in the 1 illustrated case example down, causing the insulating material 2 directed downward, thus supporting gravity's natural gravity fall process.

The venturi nozzle 1 points between the conveyor side 13 and the tubular lance 141 a working area consisting of an annular insert 17 in the material passage 11 consists. The annular insert has on the outside 171 a groove 172 , which is designed so that this revolving around the annular insert 17 round lead. This forms between the annular insert 17 and the outer wall 12 the Venturi nozzle 1 a distribution space, which forms a distribution around the pumped medium. Next are in a lateral end 174 , which at the introduction side 14 is arranged, drilling 173 provided that the distribution space, namely the groove 172 with the material passage 11 connect. The holes 173 form air flow supply here 16 , These are annular around the longitudinal axis L in the annular insert 17 so distributed over the 360 ° of the annular insert 17 the holes 173 evenly distributed, ie equidistant. The ends of the holes in the material passage 11 open, form openings of the air flow supply 161 to which the compressed air 3 in the material passage 11 is introduced. The holes 173 have an angle α ≈ 30 ° to the longitudinal axis L.

In the distribution room, namely the groove 172 opens a compressed air supply 15 , which is connected on the outward-facing side, for example with a compressor, not shown here. Through this compressed air supply 15 becomes compressed air 3 introduced into the distribution space, which is evenly distributed in this and then in the flow direction X through the holes 173 in the material passage 11 entry. In this case, an air flow with a predominant flow fraction in the flow direction X is formed, so that material transport takes place in the flow direction X. This material transport is achieved by the Bernoulli effect, through which a suction within the Venturi nozzle 1 arises. This pull works from the production side 13 to the insertion side 14 and is used to the insulating material 2 in the flow direction X from the storage container through the transport line 6 and then this through the tubular lance 14 in the cavity 4 contribute. An existing flow component perpendicular to the flow direction X in this case ensures a turbulence of the individual particles that make up the insulating material 2 composed.

Another element of the embodiment shown here is the check valve 18 , here as a check valve 181 is designed. The kickback flap 181 can open and close in the folding direction R. A clockwise movement along the folding direction R closes the non-return valve 181 , counterclockwise opens the check valve 181 , With open check valve 181 can the insulation material 2 geför dert and be introduced into the cavity. The non-return valve 181 is for example in the direction of its closed position, ie the cross section of the material passage 11 shut off trained. Once in operation, the Venturi nozzle 1 a negative pressure in this area of the material passage 11 forms, the check valve opens 181 and the insulating material 2 is via the transport line 6 sucked. If then the supply of compressed air 2 is stopped, the negative pressure breaks in the material passage 11 together and the check valve 181 folds back from the open position to the closed position. Thus, it is avoided that already promoted and introduced into the cavity insulation can migrate back and the tightly and compactly introduced by the pressurization insulation 2 in the cavity 4 relaxes again.

As a pourable and einblasberarer insulation 2 , in particular for the core insulation of double-shell masonry 7 , are puffed clay beads (brand name Perlite), mineral silicate light foam in fine grain (SLS 20) or EPS beads mixed with EPS milling. The last mentioned insulating material used in the German Utility Model 20 2006 018 200 Thermal conductivity of 0.035 W / (m · K) corresponding to heat conduction group 035 is achieved. The compaction of the insulating material during the introduction at elevated pressure in accordance with the method described here and with the arrangement described herein results in a thermal conductivity of less than 0.033 W / ( m · K). When using the assembly with a check valve 18 According to dependent claim 13 even a thermal conductivity of less than 0.032 W / (m · K) corresponding to Wärmeleitgruppe 032 is achieved.

1

Venturi nozzle

11

Material passage

12

outer wall

13

conveying side

14

introduction page

141

tubular lance

142

top

15

Compressed air supply

16

Air power supply

161

opening the air flow supply

17

annular commitment

171

outside

172

groove

173

drilling

174

lateral The End

18

check valve

181

check valve

2

insulation

3

compressed air

4

cavity

41

Einbringungsort

6

transport line

62

second The End

7

bivalve masonry

71

first wall

711

Hole / opening

72

second wall

α

angle

L

longitudinal axis

R

folding direction

X

flow direction

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 202006018200 U [0010, 0038]

Claims (11)

Arrangement for introducing an insulation by means of a pourable and inflatable insulation material ( 2 ) in cavities ( 4 ) with a storage container ( 5 ), containing the pourable and einblasbaren insulating material ( 2 ), a transport line ( 6 ) with a first end at or in the storage container and a second end ( 62 ) at the cavity ( 4 ), characterized in that at the second end ( 62 ) of the transport line ( 6 ) a Venturi nozzle ( 1 ) with a material passage ( 11 ), a funding page ( 13 ), a contribution page ( 14 ) and a compressed air supply ( 15 ) with an air flow supply ( 16 ) with an inflow angle (α) to the longitudinal axis (L) of the Venturi nozzle ( 1 ), so that the compressed air ( 3 ) when entering the material passage ( 11 ) causes a mass transport in the flow direction (X) is provided. Arrangement according to claim 1, characterized in that the material passage ( 11 ) is formed as a cone, wherein the cone in the flow direction (X) is narrower in cross-section. Arrangement according to claim 1 or 2, characterized in that the introduction side ( 14 ) as a tubular lance ( 141 ) is trained. Arrangement according to claim 1, 2 or 3, characterized in that the Venturi nozzle ( 1 ) on the production side ( 13 ) with the transport line ( 6 ) is formed connectable. Arrangement according to claim 4, characterized in that more than one air flow supply ( 16 ) to the material passage ( 11 ) is provided. Arrangement according to claim 5, characterized in that the air flow supply ( 16 ) to the material passage ( 11 ) from several individual holes ( 161 ), which are preferably arranged in a ring around the longitudinal axis (L) aligned. Arrangement according to one of claims 4 to 6, characterized in that an annular insert ( 17 ) in the material passage ( 11 ) is provided, wherein on the outside ( 171 ) of the annular insert ( 17 ) a groove ( 172 ) for receiving and uniform distribution of the supplied compressed air ( 3 ) and bores ( 173 ), which the air flow supply ( 16 ), from the groove ( 172 ) to the direction of flow (X) lateral end ( 174 ) of the insert are provided. Arrangement according to one of the preceding claims, characterized in that a check valve ( 18 ) in the flow direction (X) before, behind or inside the Venturi nozzle ( 1 ) in the material passage ( 11 ) is arranged. Arrangement according to claim 8, characterized in that the check valve ( 18 ) as a check valve ( 181 ) is trained. Arrangement according to one of the preceding claims, characterized in that the inflow angle (α) between air flow supply ( 16 ) and longitudinal axis (L) between 0 ° to 75 °, preferably 0 ° to 45 °, particularly preferably 0 ° to 15 °. Arrangement according to one of the preceding claims, characterized in that the Venturi nozzle ( 1 ) directly on the cavity ( 4 ) or in the cavity ( 4 ) penetrates.