[0001] Process for filling up the cavity of a cavity wall with insulation material.
[0002] The present invention relates to a process for filling up the cavity of a cavity
wall with insulation material, in particular with rockwool or glasswool.
[0003] Such a process is known.
[0004] In,this known process larger apertures are made in the outer wall spaced from each
other by removing bricks from the wall-and through which larger apertures the insulation
material:is introduced into the cavity.
[0005] This process has the drawback of being time consuming and cumbersome.
[0006] A further drawback of the known process is, that the wall, by breaking out and replacing
the bricks, is seriously marred because always remains visible which bricks were temporarily
removed from the wall to introduce the insulation material into the cavity.
[0007] Also a process is known by which the insulation material in the shape of granulated
rockwool is blown into the cavity through a hole drilled into the outer wall.
[0008] Thisknown process has the drawback, that the conduit or the channel through which
the granulated rockwool is to be blown into the cavity by overpressure, very easily
may become obstructed or blocked so that this known process has turned out to be not
practically applicable.
[0009] The present invention provides a new process to introduce insulation material, in
particular rockwool or glasswool, into the cavity of a cavity wall.
[0010] According to the invented process, the insulation material is drawn or sucked by
means of an ejector and introduced together with the driving gas into the cavity through
an outflowpipe applied into an aperture or bore into the outer wall.
[0011] Favourably the insulation material may have the shape of rockwoolflakes or glasswoolflakes
which, without any trouble, may be sucked by the 'ejector from a storage.
[0012] Introductionthrough the outflowpipe of the ejector of the sucked insulation material
may be carried out in various ways.
[0013] Favourably, according to the invention,the insulation material is introduced into
the cavity in a direction substantially perpendicular to the longitudinal axis of
the outflowpipe.
[0014] By this measure the insulation material may be brought in the cavity at a greater
distance of the place of introduction, by which the number of borings, to be applied
into the outer wall to wholly fill up the cavity with insulation material, is reduced.
[0015] In a very favourable manner, the outflowpipe, according to a further feature of the
invented process, is rotated during the introduction of the insulation material into
the cavity.
[0016] During the introduction of the insulation material, this insulation material is deposited
in the cavity more or less circularly or spirally around the outflowpipe, and this
initially at locations further from the outflowpipe and at last at the immediate surroundings
of the outflowpipe.
[0017] According to a further feature of the invented process, the velocity of rotation
of the outflowpipe is gradually increased and/or the pressure of the driving gas is
gradually decreased during the progressive filling of the cavity.
[0018] The apparatus for applying the invented process is characterized by an ejecter with
a supply for the driving gas, a supply for the sucked insulation material and a discharge
connecting to an outflowpipe.
[0019] According to a feature of the invented apparatus, the outflowpipe ends in an end
wall, substantially extending perpendicular to the longitudinal axis of the pipe and
in front of.which end wall a discharge opening is applied in the pipe wall for discharging
the insulation material in a direction substantially perpendicular to the longitudinal
axis of the pipe.
[0020] Rotating the outflowpipe during the introduction of the insulation material into
the cavity, to thereby achieve a spirally filling of the cavity, may be carried out
in various manners.
[0021] Favourably, according to a further feauture of the invented process and apparatus,
the outflowpipe may be rotated with respect to the ejecter by driving means.
[0022] In an embodiment of the invented apparatus, the number of revolutions per minute
and/or the pressure of the driving gas may be governed automatically in dependence
of the number of revolutions carried out by the outflowpipe. The insulation material
may be simply sucked by the ejecter from a storage situated nearby the ejecter to
be introduced together with the driving gas into the cavity.
[0023] In the case of longer supply lines or -conduits from a supplys located at a greater
distance of the ejecter, it may be favourable, to supply the insulation material at
first under overpressure to the ejecter to be sucked then by the ejecter under underpressure.
[0024] The invention is illustrated by way of an example in the accompanying drawing.
[0025] As is shown in the drawing, the apparatus comprises an ejecter, consisting of a housing
(1), in which a venturi-tube (2) is formed, which, on the one side is connected to
a supply-hose (3) for the material to be introduced into the cavity (4). Into the
throat of the venturi-tube debouch a number of channels (5) for the driving gas which
may be supplied through the connection (6) of the housing (1). At the discharge side
of the venturi-channel the outflowpipe (7) is mounted detachably and exchangably to
the housing (1) and which debouches through the bore (9) in the outer wall (10) into
the cavity (4) The outflowpipe (7)is provided with an end wall (11), in front of which
the outflow aperture (12) is arranged in the pipe wall. In front of the end wall (11)
a filling member (13) is mounted to rectangularly lead or bend the driving gas and
the insulation material flow. The housing (1) supports driving means, not shown in
the drawing, by means of which the outflowpipe may be brought into rotation.
1. Process for filling the cavity of a cavity wall with insulation material, in particular
with rockwool or glasswool, characterized, in that the insulation material is sucked
or drawn from a supplys by means of an ejecter andintroduced into the cavity together
with the driving gas through an outflowpipe which is brought through an opening or
bore in the outer wall.
2. Process as claimed in claim 1, characterized, in that the insulation material is
introduced into the cavity according to a direction substantially perpendicular to
the longitudinal axis of the outflowpipe.
3. Process as claimed in claim 1 or 2, characterized, in that the outflowpipe is rotated
during the introduction of the insulation material into the cavity.
4. Process as claimed in claim 1,2 or 3, characterized, in that during the progressive
filling of the cavity, the velocity of rotation of the outflowpipe gradually is increased
and/or the pressure of the driving gas is gradually decreased.
5. Apparatusi-for applying the process according to one of the preceding claims, characterized,
in that this is provided with an ejecter with a supply for driving gas, a supply for
the sucked or drawn insulation material and a discharge connecting to an outflowpipe.
6. Apparatus as claimed in claim 5, characterized, in that the outflowpipe ends in
an end wall substantially extending perpendicular to the longitudinal. axis of the
pipe, in front of which an outflow opening is arranged in the pipe wall to discharge
insulation material according to a direction substantially perpendicular to the longitudinal
axis of the pipe.
7. Apparatus as claimed in one of the preceding claims, characterized, in that the
outflowpipe may be brought into a rotation by means of driving means.
8. Apparatus as claimed in one of the preceding claims, characterized, in that the
number of revolutions per minute of the outflowpipe and/or the pressure of the driving
gas may be governed automatically in dependence of the number of revolutions made
by the outflowpipe.