Note: Descriptions are shown in the official language in which they were submitted.
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PIPE INSULATING COVER
BACKGROUND OF THE INVENTION
1. Field of Invention
The present invention relates generally to pipes in general and in particular
to
a method and apparatus for forming a pipe insulating cover.
2. Description of Related Art
In many industries, pipes or other elements are required to be protected and
insulated from the weather or other elements. On common solutions for
providing such protection is to insulate or otherwise cover the pipe to
provide
a thermal barrier between the pipe and the environment as well as to reduce
water penetration to the pipe.
Disadvantageously, many such pipes are also required to be inspected or
accessed periodically requiring removal of the insulation. Conventional pipe
insulation is often formed by the pipe with a layer of insulation, such as, by
way of non-limiting example, fiberglass matting, mineral wool or foams. Such
insulation is commonly covered by a sheathing material, such as, by way of
non-limiting example, sheet metal or fabric to maintain the shape of the
insulation as well as to protect the insulating material from weather and
damage.
Disadvantageously, conventional pipe insulation has been difficult to remove
and reapply to a section or pipe element which may require maintenance or
inspection. In particular, it may frequently be necessary to cut or otherwise
remove the sheathing to access the pipe element. Such removal and
reapplication of the sheathing and/or insulation may potentially damage the
insulation, sheathing or both or may potentially create gaps or crack in the
sheathing which permits water to penetrate the cover thereby potentially
compromising the cover and damaging the pipe.
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SUMMARY OF THE INVENTION
According to a first embodiment of the present invention there is disclosed an
apparatus for covering a pipe component comprising a base layer having first
and second edges sized and shaped to extend around a pipe such that the
first and second edges are proximate to each other and a polymer layer
applied over the base layer. The apparatus further comprises a first fastener
applied to the first edge between the base layer and the polymer layer and a
second fastener applied to the second edge between the first base layer and
the polymer layer adapted to engage the first fastener.
The polymer layer may be applied to the first fastener so as to leave a
portion
of the first fastener exposed. The first and second fasteners may comprise
hook and loop fasteners. The first and second fasteners may comprise claps.
The clasps may be secured to a strip embedded between the base layer and
the polymer layer. The polymer layer may be formed of polyurea.
The first and second edges of the base layer may extend substantially parallel
to an axis of the pipe component. The base layer may extend between first
and second longitudinal ends wherein at least one of the first and second
longitudinal ends includes a radially compressive collar. The compressive
collar may comprise a strap extending around the first or second end. At least
a portion of the strap may be embedded within the polymer layer.
The base layer may be formed of an insulating material. The base layer may
be formed of a material selected from the group consisting of foam, aerogel,
mineral wool and fiberglass insulating matting.
According to a further embodiment of the present invention there is disclosed
a
method of forming a pipe component cover comprising providing a sheet of a
first insulating material sized to extend around the pipe component and
locating a first fastener along a first edge of the sheet, and a second
fastener
along a second edge of the sheet. The method further comprises applying a
layer of polymer over the sheet and the first fastener and at least a portion
of
1
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the second fastener to imbed at least a portion of said first fastener between
said base layer and said polymer layer.
The method further comprises wrapping the sheet about a mold so as to abut
the first edge against the second edge thereof connecting the first and second
fasteners together with a wire therebetween and applying the first fastener
and second fasteners to the first and second edges. The method further
comprises applying a layer of polymer over the first and second fasteners and
removing the wire from between the first and second fasteners to separate the
polymer layer at a junction between the first and second fasteners.
Other aspects and features of the present invention will become apparent to
those ordinarily skilled in the art upon review of the following description
of
specific embodiments of the invention in conjunction with the accompanying
figures.
BRIEF DESCRIPTION OF THE DRAWINGS
In drawings which illustrate embodiments of the invention wherein similar
characters of reference denote corresponding parts in each view,
Figure 1 is a perspective view of an apparatus for covering a pipe
component according to a first embodiment of the present
invention.
Figure 2 is a cross-sectional view of the apparatus of Figure 1
taken along
the line 2-2.
Figure 3 is a cross-sectional view of the apparatus of Figure 1 taken along
the line 2-2 having clasps according to a further embodiment of
the present invention.
Figure 4 is a cross-sectional view of the apparatus of Figure 1
taken along
the line 4-4.
Figure 5 is a perspective view of the apparatus of Figure 1 at a first
stage of
construction
Figure 6 is a perspective view of the apparatus of Figure 1 applied
around
a mold at a second stage of construction.
,
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Figure 6 is a
cross-sectional view of the apparatus of Figure 1 having a
wire being removed from between the fasteners at a third stage of
construction.
Figure 8 is a top
perspective view of an apparatus for covering a pipe
component according to a further embodiment of the present
invention.
Figure 9 is a bottom perspective view of an a apparatus for covering a
pipe
component according to a further embodiment of the present
invention.
DETAILED DESCRIPTION
Referring to Figure 1, an apparatus for covering a pipe component according
to a first embodiment of the invention is shown generally at 20. As
illustrated
in Figure 1, the pipe component may comprise a pipe section, although it will
be appreciated that similar methods described below for forming the
apparatus 20 may also be utilized for forming a cover to fit about an elbow
section, a valve, t-fitting or any other element as are known in the art. The
apparatus 20 comprises an elongate tubular member 22 extending between
first and second ends, 24 and 26, respectively. The tubular member 22 has
an outer surface 28 and an interior passage 30 (as illustrated in Figure 4)
extending therethrough between the first and second ends 24 and 26.
As illustrated in Figures 2-4, the tubular member 22 is formed of a first base
layer 32 and a second polymer layer 34 applied thereover. The base layer 32
comprises a substantially planar sheet formed into the required cylindrical
shape having first and second edges, 36 and 38, respectively. As further
described below, the tubular member 22 is formed by locating the base layer
32 around a mold or otherwise to the desired shape and thereafter spraying,
or otherwise applying the polymer layer 34.
The base layer 32 may be formed of any suitable insulating material, such as,
by way of non-limiting example, expanded foam, aerogel fiberglass matting,
mineral wool or the like. It will be appreciated that for applications
required to
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withstand greater temperatures, fiberglass matting or mineral wool will be
more appropriate. The polymer layer 34 is formed of a suitable polymer
material which may be applied in a liquid form, such as, by way of non-
limiting
example, polyurea, polyurethane, other polymers and composite materials
thereof and the like and when so applied will adhere directly to the base
layer.
It will be appreciated that the polymer layer 34 may be applied to the base
layer by any suitable means, such as painting or spraying. It will also be
appreciated that one or more layers of the polymer may be applied to the
base layer to achieve the desired thickness and mechanical properties. In a
tubular member 22 formed in such a manner, the base layer 32 will provide
the desired insulating characteristics and may have a thickness and material
selection required for such insulating properties. Additionally, the polymer
layer 34 will provide waterproofing for the base layer 32 from the environment
as well as providing strength to the tubular member and retaining the tubular
member in the desired shape.
The first edge 36 of the tubular member 22 includes a first fastener
component 40 disposed on the exterior surface thereof proximate to the first
edge. The second edge 38 of the tubular member 22 includes a second
fastener component 42 extending from the exterior surface thereof so as to
form a flap 44 extending from the second edge 38. The second fastener
component is adapted to overly and interconnect with the first fastener
component so as to secure the second edge 38 of the tubular member 22
together to releasably hold each other together and may be selected from any
commonly known connectors, such as, by way of non-limiting example, hook
and loop fasteners, adhesive strips, zippers or the like.
As illustrated in Figure 2, the polymer layer 34 is located so as to overly at
least a portion of the first fastener when the first fastener is located
proximate
to the first edge 36. In particular, the polymer layer 34 may cover
approximately half of the first fastener so as leave an exposed portion 46 and
a covered portion 48 embedded within the polymer layer 34 between the
polymer layer 34 and the base layer 32. The covered portion 48 serves to fix
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the first fastener in position within the polymer layer 34 at a position
relative to
the first edge 36. The exposed portion 46 provides a surface for the second
fastener 42 to be adhered to. The second fastener 42 is located such that a
first portion 50 of the second fastener is positioned on the base layer 32 and
an second portion 52 extends therefrom as illustrated in Figure 2. Thereafter
the polymer layer 34 is applied over the entire second fastener to cover it.
In
such a configuration, the first portion 50 secures the second fastener 42 is
secured within the polymer layer 34 at the desired position relative to the
second edge 38 and the second portion 52 may be secured to the first
fastener 40.
Optionally, as illustrated in Figure 3, the first and second fasteners may
comprise clasps 60 wherein a connection block 61 is secured proximate to the
first edge 36 and a base block 62 is secured proximate to the second edge
38. The base block includes a loop 64 sized to extend around the connection
block 61 and a handle 66 adapted to tighten and secure the loop 64 in
position as are commonly known. Each of the first and second edges 36 and
38 may include a backing material 68 secured between the polymer and base
layers 34 and 32 such as, by way of non-limiting example, a strip of
aluminum, copper, steel, plastic or composite materials. The apparatus
formed in such a manner may have the backing material 68 covered by the
polymer layer 34 as set out above, wherein the connection block 61 and base
block 62 thereafter secured thereto with fasteners, such as, rivets, screws or
the like. Optionally, the connection block 61 and base block 62 may be
secured to the backing material 68 secured thereto before applying the
polymer layer 34 wherein the clasps 60 may be covered with tape or the like
to prevent polymer from being applied thereto.
Turning now to Figure 4, a longitudinal cross-sectional view of one
embodiment is illustrated having end collars 70. The end collars 70 may be
formed by sleeves 72 of fabric or other radially expandable materials
extending from the ends of the base layer 32 with the polymer layer 34
sprayed or otherwise applied thereover. The end collars may optionally
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include tightening straps 74 extending therearound proximate to the first and
second ends 24 and 26. As illustrated in Figure 1 and 4, the tightening straps
74 may be embedded between the polymer layer 34 and the sleeves 72 and
may include tightening means, such as, by way of non-limiting example,
buckles 75 or the like. As illustrated in Figure 4, the sleeve 72 may extend
from annular collars 76 applied around the interior of the base layer or may
optionally extend from the base layer 32 itself. The annular collars 76 may be
formed of a similar material as the base layer
With reference to Figure 5, the apparatus may be formed by cutting or
otherwise selecting a sheet of the base layer material having a size
sufficient
to extend around the pipe component to be covered with the first and second
edges 36 and 38 abutting. Thereafter the first and second fasteners 40 and
42 may be applied thereto and a portion of the first fastener 40 covered by a
guard 78, such as, by way of non-limiting example, a sheet of paper metal or
the like to cover the exposed portion 46. A layer of polymer material may then
be applied to the base layer to cover covered portion 48 of the first fastener
40 and a portion of the second fastener 42 and base layer. It will be
appreciated that although the entire base layer and exposed portions of the
first and second fasteners may have the polymer layer 34 applied thereto at
this stage, only a sufficient amount to adhere the first and second fasteners
to
the base layer 32 may also be utilized.
With reference to Figure 6, the base layer may then be applied around a mold
8 having a shape corresponding to the pipe component to be covered along
with the sleeves 72 and straps. Once positioned as desired, the first and
second fasteners 40 and 42 may have a wire 80 located therebetween and be
secured together as illustrated in Figure 6. After the polymer layer 34 is
applied to the apparatus 20, the wire 80 is quickly removed in a direction
generally indicated at 82 before the polymer layer 34 has dried and cured so
as to separate the first and second edges 36 and 38 from each other and
permit the apparatus to be opened thereafter. As illustrated in Figure 7, the
base layer 32 may also optionally include a slot at a side opposite to the
first
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and second edges 36 and 38 to assist with opening of the apparatus to locate
it around pipe components and the like.
In operation, the apparatus may be opened by separating the first and second
fasteners 40 and 42 from each other and opening the first and second edges
36 and 38 apart so as to pass the pipe component therethrough. Thereafter
the first and second fasteners 40 and 42 may be secured together and the
strap 74 secured around ends of the apparatus to seal and insulate the pipe
component.
It will be appreciated that although the apparatus has been illustrated for
use
with substantially straight pipe components that similar methods may be
utilized to form covers for corner or t-section components as well. By way of
non-limiting example, a t-section cover 90 is illustrated in Figures 8 and 9
having a horizontal section 92 and an upright section 94 extending therefrom.
The horizontal section extends between first and second ends, 96 and 98,
respectively each having tightening straps 74 around end collars 70. The
upright section 94 may include an end collar 70 and tightening strap 74 as
illustrated in Figure 8 for use with a t-pipe section or gate valve or may
optionally have a substantially enclosed top end 100 as illustrated in Figure
9.
As illustrated in Figure 8, the t-section cover 90 has an opening 102 along
the
bottom thereof with first and second fasteners 40 and 42 to either side
thereof
to permit the cover 90 to be opened and passed over the top of the pipe
component. For embodiments where the cover 90 is intended to cover t-
sections of pipe and the like, the cover may also include a top opening
extending from one of the first or second ends 96 or 98 of the horizontal
section to the end collar 70 of the top section to permit the cover to also be
opened and the pipe passed therethrough into the interior of the cover. The t-
section cover 90 may be formed of a plurality of sheets wherein at least one
sheet of the base layer 32 is utilized for each of the horizontal section 92
and
upright sections 94. It will also be appreciated that the t-section cover or
straight cover 20 as described above may utilize pre-formed tubular insulation
sections in place of flat sheets of insulation. Additionally, it will be
appreciated
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that the material for the base layer 32 of the horizontal portion 92 will have
a
portion removed corresponding to the interior passage of the upright section
94 to provide a common interior space within the cover wherein the upright
section 94 may have a bottom end coped to correspond to the shape of the
horizontal portion 92.
While specific embodiments of the invention have been described and
illustrated, such embodiments should be considered illustrative of the
invention only and not as limiting the invention as construed in accordance
with the accompanying claims.
