NZ742362B - Adapter coupling - Google Patents
Adapter couplingInfo
- Publication number
- NZ742362B NZ742362B NZ742362A NZ74236216A NZ742362B NZ 742362 B NZ742362 B NZ 742362B NZ 742362 A NZ742362 A NZ 742362A NZ 74236216 A NZ74236216 A NZ 74236216A NZ 742362 B NZ742362 B NZ 742362B
- Authority
- NZ
- New Zealand
- Prior art keywords
- segments
- flange
- flanged
- pipe element
- tube
- Prior art date
Links
- 230000001808 coupling Effects 0.000 title claims abstract description 49
- 238000010168 coupling process Methods 0.000 title claims abstract description 46
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 46
- 238000007789 sealing Methods 0.000 claims description 16
- 239000000789 fastener Substances 0.000 claims description 9
- 238000003780 insertion Methods 0.000 claims description 9
- 229920000642 polymer Polymers 0.000 abstract description 14
- 210000001503 Joints Anatomy 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 239000012530 fluid Substances 0.000 description 6
- 101710026339 Segment-12 Proteins 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 239000002952 polymeric resin Substances 0.000 description 2
- 229910000952 Be alloy Inorganic materials 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 230000037250 Clearance Effects 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229940035295 Ting Drugs 0.000 description 1
- 230000035512 clearance Effects 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L17/00—Joints with packing adapted to sealing by fluid pressure
- F16L17/02—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket
- F16L17/04—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket with longitudinally split or divided sleeve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L21/00—Joints with sleeve or socket
- F16L21/08—Joints with sleeve or socket with additional locking means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/024—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/032—Flanged joints the flanges being connected by members tensioned axially characterised by the shape or composition of the flanges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/16—Flanged joints characterised by the sealing means
- F16L23/18—Flanged joints characterised by the sealing means the sealing means being rings
- F16L23/22—Flanged joints characterised by the sealing means the sealing means being rings made exclusively of a material other than metal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/14—Flanged joints
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/20—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics based principally on specific properties of plastics
- F16L47/24—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics based principally on specific properties of plastics for joints between metal and plastics pipes
Abstract
Some prior art practice suffers various disadvantages. Multiple parts, namely, the butt flange adapter and the backing ring, must be supplied and assembled onto the non-flanged polymer pipe element. A fusing operation is necessary to join the butt flange adapter to the non-flanged polymer pipe. This requires a fusing machine, which requires power or a heat source for operation. The fusing operation itself takes time and is affected by the weather when joints are to be made in the field. For example, cold weather will slow the fusing process, and can stop it entirely if severe enough. There is clearly a need for improved components and a method for joining non-flanged polymer pipe elements to flanged pipe elements. An example of a device which may satisfy such a need, may be in the form of a coupling for joining a flanged pipe element to a non-flanged pipe element has segments that are connected end to end and surround a central space. Flange portions extend from one side of the segments. Each segment defines two channels, one of which receives a split ring for gripping the non-flanged pipe; the other channel receives a seal. A flanged tube is also positioned between the segments. The flange of the tube is positioned adjacent to the flange portions of the segments. The seal engages the tube and the non-flanged pipe element. The flange portions of the segments are bolted to the flange of the flanged pipe element and the flange of the tube is captured between the flanged portions of the segments and the flange of the flanged pipe element. requires a fusing machine, which requires power or a heat source for operation. The fusing operation itself takes time and is affected by the weather when joints are to be made in the field. For example, cold weather will slow the fusing process, and can stop it entirely if severe enough. There is clearly a need for improved components and a method for joining non-flanged polymer pipe elements to flanged pipe elements. An example of a device which may satisfy such a need, may be in the form of a coupling for joining a flanged pipe element to a non-flanged pipe element has segments that are connected end to end and surround a central space. Flange portions extend from one side of the segments. Each segment defines two channels, one of which receives a split ring for gripping the non-flanged pipe; the other channel receives a seal. A flanged tube is also positioned between the segments. The flange of the tube is positioned adjacent to the flange portions of the segments. The seal engages the tube and the non-flanged pipe element. The flange portions of the segments are bolted to the flange of the flanged pipe element and the flange of the tube is captured between the flanged portions of the segments and the flange of the flanged pipe element.
Description
Adapter Coupling
Cross Reference to Related Application
This application is based upon and claims the benefit of priority to US.
Provisional Application No. 62/271,395, filed December 28, 2015 and hereby
incorporated by reference.
Field of the ion
This ion relates to mechanical couplings for joining pipe elements end
to end, and in particular, for joining flanged pipe elements to non—flanged pipe
elements.
Background
As taught in the prior art, connecting a non-flanged polymer pipe element to a
flanged pipe element of either polymer or metal, requires the use of a backing ring,
y made of metal, and a polymer butt flange adapter. To effect the connection,
the backing ring is slipped over the free end of the non-flanged polymer pipe element
and then the butt flange r is coaxially aligned with and fused to the free end of
the non-flanged pipe element in a butt joint. This creates a flanged facing on the
previously non—flanged polymer pipe element which is then engaged, flange to flange,
with the flanged pipe element. The backing ring is then brought to bear on the flange
of the butt flange adapter and bolts are used to attach the backing ring to the flange of
the flanged pipe element, capturing and ing the flange of the butt flange adapter
to the flanged pipe element. For polymer to metal flange engagement under low
pressure applications the soft polymer flange of the butt flange r deforms upon
contact with the metal flange of the flanged pipe element to form a fluid-tight seal.
For higher pressure applications a face seal may be used between the acing
flanges to ensure fluid tightness.
While effective, this prior art practice suffers various disadvantages. Multiple
parts, , the butt flange adapter and the backing ring, must be ed and
assembled onto the non-flanged polymer pipe element, A fusing operation is
necessary to join the butt flange adapter to the nged r pipe. This
requires a fusing e, which requires power or a heat source for operation. The
fusing operation itself takes time and is affected by the weather when joints are to be
made in the field, For example, cold weather will slow the fusing process, and can
stop it entirely if severe enough. There is clearly a need for improved components
and a method for joining non-flanged polymer pipe elements to flanged pipe
elements.
Summary
The invention concerns a coupling for joining a flanged pipe element to a
plain end pipe element. In one example embodiment the coupling comprises a
plurality of segments attached to one another in spaced apart on end to end
surrounding a l space. By way of example each of the segments comprises first
and second sides oppositely disposed. A first channel is positioned proximate to the
first side and extends circumferentially around and facing the central space, A first
flange is positioned proximate to the second side and extends outwardly away from
the central space, The first flange has a plurality of holes therethrough. A second
channel is positioned between the first l and the flange and extends
circumferentially around and faces the l space. The coupling r comprises
a split ring positioned in the first channel. A seal is positioned in the second channel.
A tube is positioned within the central space and extends outwardly from the second
sides of the segments. The tube engages the seal. A second flange may extend
outwardly from the tube and positioned adjacent to the first flange. A barb may
extend dly from the tube proximate one end thereof.
In an example embodiment the first channel comprises two side surfaces
arranged in spaced relation. At least one of the segments may have at least one notch
positioned in the two side surfaces adjacent to an end of the at least one segment. A
floor e extends between the side surfaces. The floor surface comprises first and
second surface ns arranged respectively at opposite ends of the segments. A
third surface portion is positioned between the first and second surface portions. The
first and second surface portions each have a radius of curvature greater than a radius
of curvature of the third surface portion. In a specific example embodiment the
radius of curvature of the first and second surface portions on at least one of the
segments is equal to an outer radius of curvature of the split ring. By way of further
example, at least one of the first and second surface portions has a length extending
from 5% to 45% of a total ferential length of the first l.
In an e embodiment the seal comprises a flexible, resilient sealing ring
having first and second ring inner surfaces adapted to respectively engage outer
surfaces of the tube and the pipe element. One of the ring inner surfaces has a
er sized to receive the pipe element upon insertion of the pipe elements
between the segments. Further by way of example, the seal has an outer e
engaged with and supporting the segments in a preassembled state in spaced apart
relation sufficient to allow the pipe element to be inserted into the central space. In an
example embodiment, the split ring has an outer radius of curvature and an inner
radius of curvature. The inner radius of ure is equal to or greater than an outer
radius of the pipe element.
In an example embodiment, the split ring supports the segments in a
preassembled state in spaced apart relation sufficient to allow the pipe elements to be
inserted into the central space. By way of further example, the split ring has sufficient
stiffiiess to maintain the segments in the preassembled state through handling of the
coupling during ion of the pipe element. By way of r example, the split
ring comprises a plurality of teeth arranged in spaced relation to one another and
extending circumferentially around the split ring, the teeth ting toward the
central space.
In an example embodiment the segments comprise adj ustably tightenable
attachment members for drawing the segments toward the central space. In a specific
example, the adj ustably tightenable attachment members comprise projections
extending from opposite ends of each segment. Each projection defines an opening
for receiving a fastener. The fasteners extend n the segments and hold the
ts together in a preassembled state.
Brief Description of the Drawings
Figure 1 is an isometric exploded View of an example coupling according to
the invention;
Figure 1A is an isometric view of an example coupling ing to the
invention shown in a preassembled state;
Figure 2 is a longitudinal sectional View taken at line 2-2 of Figure 1A;
Figure 3 is a cross sectional view taken at line 3-3 of Figure 2;
Figure 3A is a cross sectional view taken at line 3A-3A of Figure 2;
Figure 4 is an isometric view of the coupling shown in Figure 1 shown
engaging a non-flanged pipe element;
Figure 5 is a longitudinal sectional View showing the coupling of Figure 1
connecting a flanged pipe element to a non-flanged pipe element; and
Figure 6 is an axial View of the coupling shown in Figure 1.
Detailed Description
Figure 1 shows an example embodiment of a coupling 10 for joining flanged
pipe elements to non-flanged pipe elements according to the ion. Coupling 10
ses a ity of segments, in this example, two segments 12 and 14 attached
to one another end to end and nding a central space 16. ts 12 and 14 are
advantageously formed of cast ductile iron, although other materials may also be
2O used. Attachment of the segments 12 and 14 is effected via adjustable attachment
members 18 positioned at each end of each segment. In this example attachment
members 18 comprise projections 20 that extend from the ends of the segments, the
projections having gs 22 that receive a fastener, such as bolt 24 and nut 26.
Upon tightening of the fasteners 24, 26 the segments 12 and 14 are drawn toward one
another and the l space 16 to effect connection with a pipe element 28 as shown
in Figures 4 and 5 and described below.
As shown in Figure 2, coupling 10 has first and second sides 30 and 32
oppositely disposed from one another. A first channel 34 is positioned in the
segments 12 and 14 proximate to the first side 30. First channels 34 extend
circumferentially around and face the central space 16. First channels 34 are each
defined by two side surfaces 36 and 38 arranged in spaced apart relation to one
another. A floor surface 40 extends between the side surfaces. As shown in Figure 3,
the floor surface 40 comprises first and second surface portions 42 and 44 arranged
respectively at opposite ends 46 and 48 of the segments 12 and 14 (segment 12 being
shown). A third surface portion 50 is positioned between the first and second e
portions 42 and 44. Each surface n 42, 44 and 50 has a respective radius of
curvature 42a, 44a and 50a. Radii 42a and 44a are greater than the radius of ure
50a of the third surface portion 50. The centers of radii 42a and 44a are offset from
the center of radius 50a as depicted in Figure 3. The first and second surface portions
42 and 44 may each have a length extending from about 5% to about 45% of the total
length of the first channel 34 for practical coupling designs.
As shown in Figures 1 and 2, coupling 10 further comprises a first flange 52
positioned proximate to the second sides 32 of each segment 12 and 14. Flange 52 is
formed of flange portions 52a and 52b on respective segments 12 and 14 and extends
dly away from the central space 16. Flange 52 has a plurality of h holes
54 (see also Figure 1A). The flange 52 and through holes 54 are designed to mate
with the flange of a flanged end pipe t as described below. A second channel
56 is positioned in each segment 12, 14 between the first channels 34 and the first
flanges 52. Second channels 56 extend circumferentially around and face the central
space 16. r to first channels 34, second channels 56 are each defined by two
side surfaces 57 and 59 ed in spaced apart relation to one another as shown in
Figure 2, A floor e 61 extends between the side surfaces. As shown in Figure
3A, the floor surface 61 comprises first and second surface portions 63 and 65
arranged respectively at opposite ends 46 and 48 of the segments 12 and 14 (segment
12 being shown). A third surface portion 67 is positioned between the first and
second surface portions 63 and 65. Each e portion 63, 65 and 67 has a
respective radius of curvature 63a, 65a and 67a. Radii 63a and 65a are greater than
the radius of curvature 67a of the third surface portion 67. The centers of radii 63a
and 65a are offset from the center of radius 67a as depicted in Figure 3A. The first
and second surface portions 63 and 65 may each have a length extending from about
% to about 45% of the total length of the second channel 56 for cal ng
designs.
As shown in Figures 1 and 2, a split ring 58 is positioned within the first
channels 34 of segments 12 and 14. Split ring 58 in this example comprises a
plurality of teeth 60 arranged in spaced on to one another. Teeth 60 extend
circumferentially around the split ring 58 and project toward the central space 16.
Such split rings are made of metal, such as spring steel, ess steel or copper-
beryllium alloys and are effective at retaining pipe elements made ofHDPE or other
polymer resins, to the coupling 10. The split ring 58 has an inner diameter 62 equal to
or greater than the outer diameter of the pipe element. Teeth 60 may furthermore be
angularly oriented to permit insertion of the pipe element into central space 16, but
prevent its withdrawal.
Split ring 58 may be used to hold the ts 12 and 14 in spaced apart
relation in the so-called sembled state”, illustrated in Figure 1A. Split ring 58
has an outer diameter 64 sized to engage the first and second surface portions 42 and
44 of floor surface 40 (see Figure 3). These surface potions have radii of curvature
42a and 44a larger than the third surface portion 50 and are designed to cooperate
with the split ring 58 for support of the segments 12 and 14 such that the pipe element
28 may be inserted into the l space 16 from side 30 when coupling 10 is in the
preassembled state. Fasteners (bolts 24 and nuts 26) hold the segments 12 and 14
together and against the split ring 58, which has sufficient stiffness to t the
segments during handling for installation but, being a split ring, is sible to a
smaller diameter and permits the segments to be drawn toward one another and effect
a fluid tight, mechanically restrained joint when the fasteners are tightened as
described below.
Fluid tightness of the joint is afforded by a seal 66 positioned in the second
channels 56 of segments 12 and 14 as shown in Figure 2. In this example seal 66
comprises a flexible, resilient sealing ring 68. Sealing ring 68 has an outer surface 70
having a diameter 71. In an example embodiment, diameter 71 is sized either to
support the segments 12 and 14 in spaced relation in the preassembled state, or to
assist split ring 58 in supporting the segments. To this end outer er 71 is sized
to engage the first and second surface portions 63 and 65 of floor surface 61 of the
second channel 56 (see Figure 3A). These surface portions have radii of curvature
63a and 65a larger than the third surface portion 67 and are designed to cooperate
with the sealing ring 68 for support of the segments 12 and 14 to permit insertion of
the pipe element 28 into the central space 16 from side 30 when coupling 10 is in the
preassembled state shown in Figure 1A. Sealing ring 68 may also have sufficient
stiffness to support the segments during handling for installation. Sealing ring 68 may
be formed of elastomers such as EPDM and is thus able upon tightening of the
fasteners 24, 26 to permit a joint to be formed as described below.
To effect a fluid tight seal, sealing ring 68 has first and second ring inner
surfaces 72 and 74 oned on opposite sides of the sealing ring. Surface 72 is
positioned and adapted to engage the outer surface of pipe t 28 upon insertion
of the pipe element into the l space 16 (described below). As shown in Figure
2, surface 74 is adapted to engage the outer surface of a tube 76 positioned within the
central space 16. A barb 77 is positioned proximate one end of tube 76 to engage the
lobe 74a on which inner surface 74 is positioned. Barb 77 extends ferentially
around and outwardly from tube 76 and helps retain the tube within sealing ring 68.
Tube 76 is part of the coupling 10 and extends outwardly from the second sides 32 of
the segments 12 and 14. A second flange 78 may extend outwardly from tube 76 and
is positioned in spaced on away from barb 77, adjacent to the first flange 52
when the opposite end of the tube 76 is engaged by the inner surface 74 of sealing
ring 68 as illustrated in Figure 2. It is advantageous to form tube 76 and its flange 78
as a unitary piece from a polymer resin such as HDPE. This design helps ensure fluid
tightness of the joint as noted below. Sealing ring 68 may also have an inwardly
projecting rib 80 that engages both the tube 76 and the pipe element 28 and acts as a
stop to ensure proper depth of engagement between these components and the
coupling 10.
Installation of the coupling 10 is illustrated with reference to Figures 1A, 4, 5
and 6. Pipe element 28 is to be connected to a flanged pipe element 82 (see Figure 5).
As shown in Figures 1A and 6, the pipe element 28 is inserted into the central space
16 of coupling 10 from the first side 30 of the segments 12 and 14. Insertion is
possible because the ng 10 is in the preassembled state, with segments 12 and
14 supported in spaced relation either on seal 66 alone, split ring 58 alone, or on both
the seal and the split ring. Insertion is further aided by notches 94 positioned in side
surfaces 36, 38 of each segment 12 and 14. The notches 94 are positioned adjacent to
the attachment members 18 (projections 20) and provide clearance for pipe element
insertion which s the segments 12 and 14 to be closer together in the
embled state than would be possible in the absence of the notches. Once pipe
element 28 is ly seated (the end engaging stop rib 80, the sealing ring inner
surface 72 engaging the outer surface of the pipe element) fasteners 24, 26 are
tightened thereby g ts 12 and 14 toward one another as shown in
Figures 4 and 5. Motion of the segments 12 and 14 deforms both the split ring 58 and
the seal 66.
Split ring 58 shrinks in circumference and diameter as it is forced to conform
within the first channel 34. Shrinking of split ring 58 causes teeth 60 on the split ring
to bite into the outer surface of the pipe element 28 and prevent its withdrawal from
the coupling 10. Seal 66, ained within the second channel 56, is compressed
between the segments 12 and 14 as the segments are brought together. As shown in
Figure 5, the sealing ring inner surface 72 is forced into g engagement with the
outer surface 84 of the pipe element 28, and sealing ring inner surface 74 is brought
into sealing engagement with the outer surface 86 of tube 76.
With the segments 12 and 14 brought together as depicted in Figures 4 and 5,
the first flange 52 is thus arranged so that its holes 54 may be aligned with
corresponding holes 88 in the flange 90 of the flanged pipe element 82 to which the
pipe element 28 is to be joined. As shown in Figure 5, the coupling 10 is aligned with
the flanged pipe element 82, holes 54 in the first flange 52 are aligned with holes 88
in flange 90 and ers 92 are received in holes 54 and 88 to connect the first
flange 52 to the flange 90 of the flanged pipe element 82. Second flange 78 of tube
WO 16969
76 is captured between flange 90 and first flange 52. This configuration provides
stiffness and ity to the joint as well as fluid tightness between the coupling 10
and the flanged pipe element 82 as the softer polymeric material comprising the
second flange 78 is compressed between the metal flanges 90 and 52, which may
comprise cast iron, steel or other durable metals.
Couplings according to the invention provide advantages over prior art
methods and couplings for joining non-flanged polymeric pipe ts to flanged
pipe elements. Being in a pre-assembled state, ngs according to the invention
reduce the number of parts that must be handled during installation. Furthermore, the
step of fusing a butt flange adapter to the non-flanged polymer pipe element is
eliminated along with the need for a fusing machine. Installation time and complexity
is thereby reduced substantially.
Claims (16)
1. A coupling for joining a flanged pipe t to a plain end pipe t, said coupling comprising: a plurality of segments attached to one another in spaced apart relation end to end surrounding a central space, each of said ts comprising: first and second sides oppositely disposed; a first channel positioned proximate to said first side and extending circumferentially around and facing said central space; a first flange positioned ate to said second side and extending outwardly away from said central space, said first flange having a ity of holes therethrough; a second channel positioned between said first channel and said flange and extending circumferentially around and facing said central space; wherein said coupling further comprises: a split ring positioned in said first channel; a seal positioned in said second channel; a tube positioned within said central space and extending outwardly from said second sides of said segments, said tube engaging said seal.
2. The coupling according to claim 1, n said first channel comprises: two side surfaces arranged in spaced on; a floor surface extending between said side surfaces, said floor surface comprising first and second surface portions arranged respectively at opposite ends of said segments and a third e portion positioned therebetween, said first and second surface portions each having a radius of curvature greater than a radius of curvature of said third surface portion. WO 16969
3. The coupling ing to claim 2, wherein said radius of curvature of said first and second surface portions on at least one of said segments is equal to an outer radius of curvature of said split ring.
4. The ng according to claim 2, wherein at least one of said first and second surface portions has a length extending from 5% to 45% of a total circumferential length of said first channel.
5. The coupling according to claim 1, wherein said seal comprises a flexible, ent sealing ring having first and second ring inner surfaces adapted to respectively engage outer surfaces of said tube and said pipe element, one of said ring inner surfaces having a er sized to receive said pipe element upon insertion of said pipe elements between said segments.
6. The coupling according to claim 5, wherein said seal has an outer surface engaged with and supporting said segments in a preassembled state in spaced apart relation ent to allow said pipe element to be inserted into said central space.
7. The coupling according to claim 1, wherein said split ring has an outer radius of curvature and an inner radius of curvature, said inner radius of curvature being equal to or greater than an outer radius of said pipe element.
8. The coupling according to claim 1, wherein said split ring supports said segments in a preassembled state in spaced apart on sufficient to allow said pipe elements to be inserted into said central space.
9. The coupling according to claim 8, wherein said split ring has sufficient stiffness to maintain said segments in said preassembled state through handling of said coupling during insertion of said pipe element.
10. The coupling according to claim 1, wherein said split ring comprises a plurality of teeth arranged in spaced on to one another and extending circumferentially around said split ring, said teeth projecting toward said central space.
11. The coupling according to claim 1, wherein said plurality of segments comprises no more than two said segments.
12. The coupling according to claim 11, wherein each said segment comprises able attachment members located at opposite ends thereof.
13. The coupling according to claim 12, wherein said adjustable attachment s comprise projections extending from opposite ends of each said segment, each said projection defining an opening for receiving a fastener.
14. The coupling according to claim 2, wherein at least one of said segments has at least one notch oned in said two side surfaces adjacent to an end of said at least one segment.
15. The coupling according to claim 1, further comprising a second flange extending outwardly from said tube and positioned adjacent to said first flange.
16. The coupling according to claim 1, r sing a barb extending outwardly from said tube ate one end thereof. WO 16969 WO 16969 WO 16969 42"? WO 16969 WO 16969
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201562271395P | 2015-12-28 | 2015-12-28 | |
US62/271,395 | 2015-12-28 | ||
PCT/US2016/068258 WO2017116969A1 (en) | 2015-12-28 | 2016-12-22 | Adapter coupling |
Publications (2)
Publication Number | Publication Date |
---|---|
NZ742362A NZ742362A (en) | 2019-07-26 |
NZ742362B true NZ742362B (en) | 2019-10-30 |
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