CA1096901A - Pipe coupling - Google Patents
Pipe couplingInfo
- Publication number
- CA1096901A CA1096901A CA331,702A CA331702A CA1096901A CA 1096901 A CA1096901 A CA 1096901A CA 331702 A CA331702 A CA 331702A CA 1096901 A CA1096901 A CA 1096901A
- Authority
- CA
- Canada
- Prior art keywords
- sleeve
- retainer ring
- axial
- end portion
- pipe
- 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.)
- Expired
Links
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
- F16L27/00—Adjustable joints, Joints allowing movement
- F16L27/02—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction
- F16L27/04—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction with partly spherical engaging surfaces
Abstract
ABSTRACT OF THE DISCLOSURE
A pipe coupling of the type having two flanged type pipe end portions surrounded by a sleeve and held together by lever-operated half-shells whose radially inwardly directed flanges engage axially outside shoulders of radial protrusions, one of such protrusions being on a retainer ring whose small-diameter portion is inserted in one end portion of the sleeve, the other protrusion being on the exterior of the sleeve. In one embodiment, two rings are provided, one at each end of the coupling, whereby a single shell may engage only protrusions on the respective rings, thus eliminating the need for the radial outward protrusions on the sleeve. The invention provides axial and radial clearance between the components, namely between the retainer ring and the respective pipe end, and between the ring and the engaged end of the sleeve, to improve accommodation within the coupling of both angular and axial displacement between the pipe end portions, when the coupling is in a closed state, thus considerably broadening the field of application of the coupling.
A pipe coupling of the type having two flanged type pipe end portions surrounded by a sleeve and held together by lever-operated half-shells whose radially inwardly directed flanges engage axially outside shoulders of radial protrusions, one of such protrusions being on a retainer ring whose small-diameter portion is inserted in one end portion of the sleeve, the other protrusion being on the exterior of the sleeve. In one embodiment, two rings are provided, one at each end of the coupling, whereby a single shell may engage only protrusions on the respective rings, thus eliminating the need for the radial outward protrusions on the sleeve. The invention provides axial and radial clearance between the components, namely between the retainer ring and the respective pipe end, and between the ring and the engaged end of the sleeve, to improve accommodation within the coupling of both angular and axial displacement between the pipe end portions, when the coupling is in a closed state, thus considerably broadening the field of application of the coupling.
Description
~0C~69C~1 PIPE COUPLING
The present invention relates to a pipe coupling for connecting two pipe end portions, of the type wherein each pipe end portion is provided with a radially outwardly turned collar portion and with an annular seal, ~he coupling further including a sleeve arranged to surround said end portions when the same are connected by said coupling, and a clamping device comprising clamping shell means pivotally secured to each other and provided, at respective axial ~nds thereof, with inwardly protruding end flange means such that the end flange means clamps between said axial ends to radially outwardly protruding projection means axially spaced from each other.
It is known to provide the above type of a pipe coupling such that one pipe end portion is shaped as a plug insertable into a socket forming sleeve provided with a fixed coupling seat. Suitable locking rings or protrusions for holding together the two pipe end portions are normally provided on the plug portion.
The known type of a pipe coupling requires a distinct type of each of the two pipe end portions as the pipe end portion forming the plug cannot be interchanged with the socket portion. This often results in difficulties associated with the manufacture and assembly of a pipe line.
It is further of disadvantage that only a limited flexibility can be provided for between one of the two pipe end portions and the sleeve. Such limited flexibility is used in accommodating within the coupling small axial displacements or in allowing a limited flexing, the latter ~k `: :
. .
. , . .. ` ...... . .
.-.; ,` ~ .;; .. . .
.. . . . . . . .
.-690l being possible if the periphery of one or both annular p~otrusions at the flexing pipe end portions are shaped as a spherical segment. However, the clearance achieved in the above type of couplings is relatively small for both types of 5 misalignment.
It is often desirable to provide for compensation within this type of pipe coupling for axial displacements of a greater magnitude. It is also desirable in certain installations to accom~odate with the coupling angular 10 misalignment of a greater degree than that allowed by prior art~
It is therefore an object of the present invention to provide a pipe coupling capable of connecting two generally identical pipe end portions and allowing axial displacement 15 of the coupled pipe end portions to an increased degree, and capable of compensating for correspondingly greater axial displacements. A further object of the invention is to provide, if required, an increase in allowable angular misalignment between the two parts, of an increased magnitude.
According to the present invention, a pipe coupling is provided for connecting two pipe end portions, of the type wherein each pipe end portion is provided with a radially outwardly turned collar portion and with an annular seal, the coupling further including a sleeve arranged to surround said end portions when the same are connected by said coupling, and a clamping device comprising clamping shell means pivotally secured to each other and provided, at respective axial ends thereof, with inwardly protruding end flange means such that the end flange means ¢lamps 30 between said axial ends tw~radially outwardly protruding projection means axially spaced from each other, wherein at least one of said projection means forms a generally integral part of a retainer ring engaging one of the pipe end portions and being axially displaceable relative to same, said retainer ring also engaging said sleeve and being formed as an axial stop member for the collar portion of said one of the pipe end portions.
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The above arrangement results in that the pipe end portion engaged by the retainer ring can still move within the sleeve when the coupling is closed. Furthermore, the arrangement makes it possible to produce both pipe ends of a generally identical configuration, whereby the need for a special plug member is avoided.
Furthermore, the invention makes it possible to prodluce the sleeve surrounding the respective pipe end portions long enough to provide for axial displacement between the respective pipe end portions to a substantial degree, while maintaining the respective parts within the pipe coupling. The device is thus also capable of accommodating or compensating fo~ relatively great axi~l dis~lace~ents. The axial displacement has no i~fluence whatever on the axial spacing between the two engagement rings engaged by the clamping shell means. It is of a particular advantage that the coupling according to the invention can also accommodate relatively great angular misalignments which is accomplished by making the collar portions of not only one but of both pipe end portions such that the periphery of each collar is shaped as a spherical segment, while the clearance between the exterior surface of each pipe end portion and the inside diameter of the retainer ring allows for flexibility or angular displacement in a generally radial direction.
If only a small angular displacement is required, it will suffice to provide the spherical surface only at one pipe end member. It is, however, of advantage to produce the annular protrusions at both pipe end members in the same way, i.e. with a spherical surface suc~ as to enable flexibility of both pipe end portions. Besides the increase in the displacement ratio, such arrangement provides a further advantage, namely that a pipe coupling can accommodate even so-called parallel displacement or staggered mis-alignment between the axes of the two connected pipes.
The length of the sleeve only has to be sufficient to provide a clearance between the facing ends of the connected pipe end portions necessary for accommodating axial displace-ments and an additional clearance necessary for allowing , ~
~ 691D~
angular displacement of the pipe end portions relative to each other and to the sleeve.
It is further of advantage if the inside passage of the retainer ring and/or of the end of the genexally cylindric passage in the sleeve are each provided at their respective ends facing axially away fxom the coupling with a conically widened portion divergent in the di~ection opposite to the direction of the inserting of the retainer ring into the sleeve. The conical widening at the end of the sleeve facilitates the insertion of the retainer ring, while that of the passage in the retainer ring serves the purpose of improving the flexibility of the joint.
According to another feature of the invention, the retainer ring is designed such that it has a relatively small outside diameter portion at the end normally inserted in the sleeve, while the outside diameter of the other end portion is greater than that of the part inserted in the sleeve, the increased diameter portion serving as an axial stop member engaging the sleeve. Furthermore, the latter end portion also provides a part on which the radially outwardly protruding projection is disposed. In order to maintain the entire device together, shell means is provided, preferably of the type of half-shells pivotally secured to each other and normally surroundin~ the coupling. They are preferably provided, at a point of the circumference, with a locking lever connection for maintaining the two shells in contracted position. In a first embodiment of the present invention, the retainer ring having the radially outwardly protruding, preferably annular projection, is provided only at one axial end of the sleeve, while the sleeve itse~f has, at its opposite end, radially inwardly turned shoulder for axially engaging the radially outward collar portion of the pipe end member inserted in the sleeve.
It is also conceivable within the scope of the present invention to provide both sides of the sleeve with a retainer ring engaging the respective ends of the sleeve, each ring being provided on its surface with a radially outwardly protruding projection while the clamping shells are of axial 9~1 length allowing for the respective inwardly directed flanges of the shells to engage the annular protrusions of both retainer rings. This particular embodiment is of advantage when only a short axial relative displacement between the pipe ends is to be accommodated, with the result that the sleeve can be made relatively short. On the other hand, the sleeve can be made of virtually any desired length if a radially outwardly protruding, preferably annular projection is provided at each end of the sleeve such that one locking shell assembly with a locking lever mechanism may be provided at each end of the sleeve to connect the respective end of the sleeve with the respective retainer ring.
The invention will be described in greater detail by way of three preferred embodiments, with reference to the accompanying drawings, wherein:
Figure 1 is a diagrammatic representation of a longitudinal section of a first embodiment of a pipe coupling according to the invention;
Figure 2 is a similar representation of a further embodiment of the present invention; and Figure 3 is a similar representation of a still further embodiment having two retainer rings engaging the respective ends of the sleeve.
In the embodiment according to Figure 1, the pipe coupling has two pipe end portions 10, 11, each provided at its end with a radially outwardly turned collar portion 12, 13. The collar portions 12, 13 define each an annular recess _ , 15 for receiving a sealing ring 16, the ring being shown in Figure 3 but not being shown in Figures 1 and
The present invention relates to a pipe coupling for connecting two pipe end portions, of the type wherein each pipe end portion is provided with a radially outwardly turned collar portion and with an annular seal, ~he coupling further including a sleeve arranged to surround said end portions when the same are connected by said coupling, and a clamping device comprising clamping shell means pivotally secured to each other and provided, at respective axial ~nds thereof, with inwardly protruding end flange means such that the end flange means clamps between said axial ends to radially outwardly protruding projection means axially spaced from each other.
It is known to provide the above type of a pipe coupling such that one pipe end portion is shaped as a plug insertable into a socket forming sleeve provided with a fixed coupling seat. Suitable locking rings or protrusions for holding together the two pipe end portions are normally provided on the plug portion.
The known type of a pipe coupling requires a distinct type of each of the two pipe end portions as the pipe end portion forming the plug cannot be interchanged with the socket portion. This often results in difficulties associated with the manufacture and assembly of a pipe line.
It is further of disadvantage that only a limited flexibility can be provided for between one of the two pipe end portions and the sleeve. Such limited flexibility is used in accommodating within the coupling small axial displacements or in allowing a limited flexing, the latter ~k `: :
. .
. , . .. ` ...... . .
.-.; ,` ~ .;; .. . .
.. . . . . . . .
.-690l being possible if the periphery of one or both annular p~otrusions at the flexing pipe end portions are shaped as a spherical segment. However, the clearance achieved in the above type of couplings is relatively small for both types of 5 misalignment.
It is often desirable to provide for compensation within this type of pipe coupling for axial displacements of a greater magnitude. It is also desirable in certain installations to accom~odate with the coupling angular 10 misalignment of a greater degree than that allowed by prior art~
It is therefore an object of the present invention to provide a pipe coupling capable of connecting two generally identical pipe end portions and allowing axial displacement 15 of the coupled pipe end portions to an increased degree, and capable of compensating for correspondingly greater axial displacements. A further object of the invention is to provide, if required, an increase in allowable angular misalignment between the two parts, of an increased magnitude.
According to the present invention, a pipe coupling is provided for connecting two pipe end portions, of the type wherein each pipe end portion is provided with a radially outwardly turned collar portion and with an annular seal, the coupling further including a sleeve arranged to surround said end portions when the same are connected by said coupling, and a clamping device comprising clamping shell means pivotally secured to each other and provided, at respective axial ends thereof, with inwardly protruding end flange means such that the end flange means ¢lamps 30 between said axial ends tw~radially outwardly protruding projection means axially spaced from each other, wherein at least one of said projection means forms a generally integral part of a retainer ring engaging one of the pipe end portions and being axially displaceable relative to same, said retainer ring also engaging said sleeve and being formed as an axial stop member for the collar portion of said one of the pipe end portions.
~6~69q)~
The above arrangement results in that the pipe end portion engaged by the retainer ring can still move within the sleeve when the coupling is closed. Furthermore, the arrangement makes it possible to produce both pipe ends of a generally identical configuration, whereby the need for a special plug member is avoided.
Furthermore, the invention makes it possible to prodluce the sleeve surrounding the respective pipe end portions long enough to provide for axial displacement between the respective pipe end portions to a substantial degree, while maintaining the respective parts within the pipe coupling. The device is thus also capable of accommodating or compensating fo~ relatively great axi~l dis~lace~ents. The axial displacement has no i~fluence whatever on the axial spacing between the two engagement rings engaged by the clamping shell means. It is of a particular advantage that the coupling according to the invention can also accommodate relatively great angular misalignments which is accomplished by making the collar portions of not only one but of both pipe end portions such that the periphery of each collar is shaped as a spherical segment, while the clearance between the exterior surface of each pipe end portion and the inside diameter of the retainer ring allows for flexibility or angular displacement in a generally radial direction.
If only a small angular displacement is required, it will suffice to provide the spherical surface only at one pipe end member. It is, however, of advantage to produce the annular protrusions at both pipe end members in the same way, i.e. with a spherical surface suc~ as to enable flexibility of both pipe end portions. Besides the increase in the displacement ratio, such arrangement provides a further advantage, namely that a pipe coupling can accommodate even so-called parallel displacement or staggered mis-alignment between the axes of the two connected pipes.
The length of the sleeve only has to be sufficient to provide a clearance between the facing ends of the connected pipe end portions necessary for accommodating axial displace-ments and an additional clearance necessary for allowing , ~
~ 691D~
angular displacement of the pipe end portions relative to each other and to the sleeve.
It is further of advantage if the inside passage of the retainer ring and/or of the end of the genexally cylindric passage in the sleeve are each provided at their respective ends facing axially away fxom the coupling with a conically widened portion divergent in the di~ection opposite to the direction of the inserting of the retainer ring into the sleeve. The conical widening at the end of the sleeve facilitates the insertion of the retainer ring, while that of the passage in the retainer ring serves the purpose of improving the flexibility of the joint.
According to another feature of the invention, the retainer ring is designed such that it has a relatively small outside diameter portion at the end normally inserted in the sleeve, while the outside diameter of the other end portion is greater than that of the part inserted in the sleeve, the increased diameter portion serving as an axial stop member engaging the sleeve. Furthermore, the latter end portion also provides a part on which the radially outwardly protruding projection is disposed. In order to maintain the entire device together, shell means is provided, preferably of the type of half-shells pivotally secured to each other and normally surroundin~ the coupling. They are preferably provided, at a point of the circumference, with a locking lever connection for maintaining the two shells in contracted position. In a first embodiment of the present invention, the retainer ring having the radially outwardly protruding, preferably annular projection, is provided only at one axial end of the sleeve, while the sleeve itse~f has, at its opposite end, radially inwardly turned shoulder for axially engaging the radially outward collar portion of the pipe end member inserted in the sleeve.
It is also conceivable within the scope of the present invention to provide both sides of the sleeve with a retainer ring engaging the respective ends of the sleeve, each ring being provided on its surface with a radially outwardly protruding projection while the clamping shells are of axial 9~1 length allowing for the respective inwardly directed flanges of the shells to engage the annular protrusions of both retainer rings. This particular embodiment is of advantage when only a short axial relative displacement between the pipe ends is to be accommodated, with the result that the sleeve can be made relatively short. On the other hand, the sleeve can be made of virtually any desired length if a radially outwardly protruding, preferably annular projection is provided at each end of the sleeve such that one locking shell assembly with a locking lever mechanism may be provided at each end of the sleeve to connect the respective end of the sleeve with the respective retainer ring.
The invention will be described in greater detail by way of three preferred embodiments, with reference to the accompanying drawings, wherein:
Figure 1 is a diagrammatic representation of a longitudinal section of a first embodiment of a pipe coupling according to the invention;
Figure 2 is a similar representation of a further embodiment of the present invention; and Figure 3 is a similar representation of a still further embodiment having two retainer rings engaging the respective ends of the sleeve.
In the embodiment according to Figure 1, the pipe coupling has two pipe end portions 10, 11, each provided at its end with a radially outwardly turned collar portion 12, 13. The collar portions 12, 13 define each an annular recess _ , 15 for receiving a sealing ring 16, the ring being shown in Figure 3 but not being shown in Figures 1 and
2 for the sake of clarity. The peripheral surface of each collar portion 12, 13 has the shape of spherical segment.
One end of a sleeve 17 is provided with an inwardly turned annular retainer flange or shoulder 18 whose inside diameter is so selected as to provide radial clearance between the flange 18 and the cylindric surface of the pipe end portion 11. The sleeve 17 is provided at its opposite end with an outwardly divergent conical enlargement lg of its inside, generally cylindric passage. The exterior surface ~a69~11 of the sleeve 17 is provided with radially outwardly protruding projection means of the type of an integral annular protrusion 20.
The pipe end portion 10 is partly surrounded by a retainer ring 21 whose one axial end portion 22 has outside diameter allowing the inserting of that end portion of the retainer ring 21 into the sleeve 17. The remaining portion of the retainer ring 21 has an enlarged outside diameter and is provided with a radially outwardly protruding projection means of the type of an integral locking annulus or shoulder 23. The retainer ring 21 has an inside, generally cylindric passage whose end portion remote from the end portion 22 of the ring is divergent axially outwardly to form an outwardly flared conical enlargement 24. Due to the enlargement, the radial clearance between the retainer ring 21 and the surface of the adjacent pipe end member 10 is still further increased at the outward end of the ring 21.
The two shoulder members or annular protrusions 20, 23 are engaged by the clamping shells 25 whose flanges 26 disposed at each end of each of the locking shells grip the respective annular protrusions 20 and 23 such that relative axial displacement of the retainer ring 21 from the sleeve 17 is not possible. After the release of a locking lever, ~not shown) the locking shells 21 can be removed.
In Figure l-,-the pipe end-port~ons 10 a~d 11 are shown in an axially aligned relationship, the maximum angular displacement being indicated by broken lines. ~he length of the sleeve 17 is so determined that at a maximum angular misalignment, an additional compensation for further axial displacement is no longer possible. Such additional dis-placement, of course, is possible if the angular misalignment between the two pipe ends does not reach the maximum shown in the drawing.
If the accommodation of an angular misalignment is 3s not require~, the peripheral~sur~aces of the annular protrusions 12 and 13 can be made generally cylindrical.
In the embodiment according to Figure 2, the pipe end ~0~6901 portions 10 and 11, as well as the retainer ring 21 and the respective portions of such elements are of the same general configuration and structure as in the embodiment of Figure 1. Therefore, the respective parts are designated with the same reference numerals as in Figure 1.
In this embodiment, a sleeve 27 is shown of a greater overall length. The respective portions of such extremely long sleeve, however, correspond to those of the aforesaid sleeve 17 so that the same reference numerals are still applicable. Compared with the embodiment of Figure 1, the arxangement in Figure 2 actually differs from the former only in the length of the coupling sleeve. Naturally, an even greater length of the sleeve than that shown in Figure 2 can be used.
The embodiment shown in Figure 3 represents an arrangement wherein a sleeve 28 is provided at both its ends with a protrusion 20 and its passage has an outwardly divergent conical enlargement 19 at each end. The pipe end portions 10, 11 are each inserted into one end of the sleeve 28 and are retained within the sleeve 28, each by one retainer ring 21. In the embodiment shown in Figure 3, two devices having clamping shell means 25 are shown. The end flanges 26 of each of the clamping shell means engages one radial protrusion or annulus 20 of the sleeve 28 and one annular protrusion or clamping ring 23 of the retainer ring 21.
As an alternative to this embodiment, it is also conceivable to provide only a single clamping shell means of axial length sufficient for the inwardly turned flanges of the clamping device to engage ~he annular protrusions 23 of both retainer rings. In such arrangement, the annular protrusions 20 of the shell would be redundant.
The pipe end portions 10, 11, as shown in Figure 3, are disposed within a common plane, yet, they are angularly misaligned relative to the sleeve. It will be observed in 35 Figure 3 that in this case the two longitudinal axes 29 of the pipe end me~berslO, 11 are not coaxial with each other.
Instead, they are generally parallel and are disposed at a predetermined axial spacing which is shown as a maximum axial 1~96901 spacing between the end portions 10, 11 capable of being accommodated within the pipe coupling at the shown incline of the two axes 29. Thus, the coupling may be designed to accommodate certain axial displacement between the pipe ends 10, 11 additional to the axial spacing required to accommodate the expected angular misalignment between the ends 10, 11. If required, the sleeve 28 can be made longer or shorter than the sleeve 27 of the embodiment of Figure 2.
Those skilled in the art will readily appreciate 10 many modifications differing from the above preferred embodiments.
For instance, the protrusions 23 can be of the type of three or more e~uidistant or non-equidistant separate projections disposed about the periphery of the respective 15 retainer ring 21 such that a continuous, annular shape of the part 23 is no longer present. Such interrupted protrusions may be combined with a continuous or discontinuous respective inwardly directed flange 26. Alternatively, the flange 26 may be substituted by discontinuous radially 20 inwardly directed protrusions. The above parts can therefore be also referred to as "radially outwardly protruding projection means" (23) and "inwardly protruding end flange means" (26), respectively.
The above is but one example indicating that many 25 embodiments may exist which differ from the described preferred embodiments without departing from the scope of the present invention as recited in the accompanying claims.
One end of a sleeve 17 is provided with an inwardly turned annular retainer flange or shoulder 18 whose inside diameter is so selected as to provide radial clearance between the flange 18 and the cylindric surface of the pipe end portion 11. The sleeve 17 is provided at its opposite end with an outwardly divergent conical enlargement lg of its inside, generally cylindric passage. The exterior surface ~a69~11 of the sleeve 17 is provided with radially outwardly protruding projection means of the type of an integral annular protrusion 20.
The pipe end portion 10 is partly surrounded by a retainer ring 21 whose one axial end portion 22 has outside diameter allowing the inserting of that end portion of the retainer ring 21 into the sleeve 17. The remaining portion of the retainer ring 21 has an enlarged outside diameter and is provided with a radially outwardly protruding projection means of the type of an integral locking annulus or shoulder 23. The retainer ring 21 has an inside, generally cylindric passage whose end portion remote from the end portion 22 of the ring is divergent axially outwardly to form an outwardly flared conical enlargement 24. Due to the enlargement, the radial clearance between the retainer ring 21 and the surface of the adjacent pipe end member 10 is still further increased at the outward end of the ring 21.
The two shoulder members or annular protrusions 20, 23 are engaged by the clamping shells 25 whose flanges 26 disposed at each end of each of the locking shells grip the respective annular protrusions 20 and 23 such that relative axial displacement of the retainer ring 21 from the sleeve 17 is not possible. After the release of a locking lever, ~not shown) the locking shells 21 can be removed.
In Figure l-,-the pipe end-port~ons 10 a~d 11 are shown in an axially aligned relationship, the maximum angular displacement being indicated by broken lines. ~he length of the sleeve 17 is so determined that at a maximum angular misalignment, an additional compensation for further axial displacement is no longer possible. Such additional dis-placement, of course, is possible if the angular misalignment between the two pipe ends does not reach the maximum shown in the drawing.
If the accommodation of an angular misalignment is 3s not require~, the peripheral~sur~aces of the annular protrusions 12 and 13 can be made generally cylindrical.
In the embodiment according to Figure 2, the pipe end ~0~6901 portions 10 and 11, as well as the retainer ring 21 and the respective portions of such elements are of the same general configuration and structure as in the embodiment of Figure 1. Therefore, the respective parts are designated with the same reference numerals as in Figure 1.
In this embodiment, a sleeve 27 is shown of a greater overall length. The respective portions of such extremely long sleeve, however, correspond to those of the aforesaid sleeve 17 so that the same reference numerals are still applicable. Compared with the embodiment of Figure 1, the arxangement in Figure 2 actually differs from the former only in the length of the coupling sleeve. Naturally, an even greater length of the sleeve than that shown in Figure 2 can be used.
The embodiment shown in Figure 3 represents an arrangement wherein a sleeve 28 is provided at both its ends with a protrusion 20 and its passage has an outwardly divergent conical enlargement 19 at each end. The pipe end portions 10, 11 are each inserted into one end of the sleeve 28 and are retained within the sleeve 28, each by one retainer ring 21. In the embodiment shown in Figure 3, two devices having clamping shell means 25 are shown. The end flanges 26 of each of the clamping shell means engages one radial protrusion or annulus 20 of the sleeve 28 and one annular protrusion or clamping ring 23 of the retainer ring 21.
As an alternative to this embodiment, it is also conceivable to provide only a single clamping shell means of axial length sufficient for the inwardly turned flanges of the clamping device to engage ~he annular protrusions 23 of both retainer rings. In such arrangement, the annular protrusions 20 of the shell would be redundant.
The pipe end portions 10, 11, as shown in Figure 3, are disposed within a common plane, yet, they are angularly misaligned relative to the sleeve. It will be observed in 35 Figure 3 that in this case the two longitudinal axes 29 of the pipe end me~berslO, 11 are not coaxial with each other.
Instead, they are generally parallel and are disposed at a predetermined axial spacing which is shown as a maximum axial 1~96901 spacing between the end portions 10, 11 capable of being accommodated within the pipe coupling at the shown incline of the two axes 29. Thus, the coupling may be designed to accommodate certain axial displacement between the pipe ends 10, 11 additional to the axial spacing required to accommodate the expected angular misalignment between the ends 10, 11. If required, the sleeve 28 can be made longer or shorter than the sleeve 27 of the embodiment of Figure 2.
Those skilled in the art will readily appreciate 10 many modifications differing from the above preferred embodiments.
For instance, the protrusions 23 can be of the type of three or more e~uidistant or non-equidistant separate projections disposed about the periphery of the respective 15 retainer ring 21 such that a continuous, annular shape of the part 23 is no longer present. Such interrupted protrusions may be combined with a continuous or discontinuous respective inwardly directed flange 26. Alternatively, the flange 26 may be substituted by discontinuous radially 20 inwardly directed protrusions. The above parts can therefore be also referred to as "radially outwardly protruding projection means" (23) and "inwardly protruding end flange means" (26), respectively.
The above is but one example indicating that many 25 embodiments may exist which differ from the described preferred embodiments without departing from the scope of the present invention as recited in the accompanying claims.
Claims (14)
1. A pipe coupling for connecting two pipe end portions, of the type wherein each pipe end portion is provided with a radially outwardly turned collar portion and with an annular seal, the coupling further including a sleeve arranged to surround said end portions when the same are connected by said coupling, and a clamping device comprising clamping shell means pivotally secured to each other and provided, at respective axial ends thereof, with inwardly protruding end flange means such that the end flange means clamps between said axial ends two radially outwardly protruding projection means axially spaced from each other, wherein at least one of said projection means forms a generally integral part of a retainer ring engaging one of the pipe end portions and axially displaceable relative to same, said retainer ring also engaging said sleeve and being formed as an axial stop member for the collar portion of said one of the pipe end portions.
2. A pipe coupling according to Claim 1, wherein radially exterior surface of the collar portion of at least one of the pipe end portions is shaped as a spherical segment;
a radial clearance being provided between exterior surface of the respective pipe end portion and the sleeve of the retainer ring to allow for a generally tilting movement of one of the pipe end portions relative to the other.
a radial clearance being provided between exterior surface of the respective pipe end portion and the sleeve of the retainer ring to allow for a generally tilting movement of one of the pipe end portions relative to the other.
3. A pipe coupling according to Claim 2, wherein the sleeve is of such length that when end faces of connected pipe end portions abut against each other, an axial clearance is provided within said coupling which enables, besides a required axial relative displacement of said end portions, an additional axial clearance allowing for tilting movement of one pipe end portion relative to the other and relative to the sleeve.
4. A pipe coupling according to any of claims 1, 2 or 3, wherein the inside diameter of the retainer ring and/or of the sleeve end adjacent to the retainer ring is provided with an axially outwardly divergent conical enlargement, whereby the inside diameter of the retainer ring and/or of the sleeve end portion increases in the direction opposite to the direction of axial inserting of the retainer ring into the sleeve.
5. A pipe coupling according to any of claims 1, 2 or 3 wherein the retainer ring has a first axial end portion whose outside diameter is arranged to engage the interior of the sleeve, the opposite axial end portion of said retainer ring having a greater outside diameter than the inside diameter of the sleeve, said opposite axial end portion being formed as an axial stop member for the sleeve and including said collar portion.
6. A pipe coupling according to any of claims 1, 2 or 3, wherein a second radially outwardly protruding projection means is arranged to be engaged by the inwardly directed flange means of the clamping shell means, said second projection means being arranged at the outer surface of the sleeve.
7. A pipe coupling according to any of claims 1, 2 or 3, wherein each axial end of the sleeve is provided with one retainer ring, each retainer ring comprising one of said projection means for engagement with the clamping shell means, the axial length of the clamping shell means being such that each of the end flange means thereof is arranged to engage one of the respective projections of the respective retainer ring.
8. A pipe coupling according to any of claims 1, 2 or 3, wherein the inside diameter of the retainer ring and/or of the sleeve end adjacent to the retainer ring is provided with an axially outwardly divergent conical enlargement, whereby the inside diameter of the retainer ring and/or of the sleeve end portion increases in the direction opposite to the direction of axial inserting of the retainer ring into the sleeve; the retainer ring having a first axial end portion whose outside diameter is arranged to engage the interior of the sleeve, the opposite axial end portion of said retainer ring having a greater outside diameter than the inside diameter of the sleeve, said opposite axial end portion being formed as an axial stop member for the sleeve and including said collar portion.
9. A pipe coupling according to any of claims 1, 2 or 3, wherein the inside diameter of the retainer ring and/or of the sleeve end adjacent to the retainer ring is provided with an axially outwardly divergent conical enlargement, whereby the inside diameter of the retainer ring and/or of the sleeve end portion increases in the direction opposite to the direction of axial inserting of the retainer ring into the sleeve; a second radially outwardly protruding projection being arranged to be engaged by the inwardly directed flange means of the clamping shell means, said second projection means being arranged at the outer surface of the sleeve.
10. A pipe coupling according to any of claims 1, 2 or 3, wherein the retainer ring has a first axial end portion whose outside diameter is arranged to engage the interior of the sleeve, the opposite axial end portion of said retainer ring having a greater outside diameter than the inside diameter of the sleeve, said opposite axial end portion being formed as an axial stop member for the sleeve and including said collar portion; a second radially out-wardly protruding projection means being arranged to be engaged by the inwardly directed flange means of the clamping shell means, said second projection means being arranged at the outer surface of the sleeve.
11. A pipe coupling according to any of claims 1, 2 or 3, wherein the inside diameter of the retainer ring and/or of the sleeve end adjacent to the retainer ring is provided with an axially outwardly divergent conical enlargement, whereby the inside diameter of the retainer ring and/or of the sleeve end portion increases in the direction opposite to the direction of axial inserting of the retainer ring into the sleeve; the retainer ring having a first axial end portion whose outside diameter is arranged to engage the interior of the sleeve, the opposite axial end portion of said retainer ring having a greater outside diameter than the inside diameter of the sleeve, said opposite axial end portion being formed as an axial stop member for the sleeve and including said collar portion; a second radially outwardly protruding projection being arranged to be engaged by the inwardly directed flange means of the clamping shell means, said second projection means being arranged at the outer surface of the sleeve.
12. A pipe coupling according to any of claims l, 2 or 3, wherein the inside diameter of the retainer ring and/or of the sleeve end adjacent to the retainer ring is provided with an axially outwardly divergent conical enlargement, whereby the inside diameter of the retainer ring and/or of the sleeve end portion increases in the direction opposite to the direction of axial inserting of the retainer ring into the sleeve; each axial end of the sleeve being provided with one retainer ring, each retainer ring comprising one of said projection means for engagement with the clamping shell means, the axial length of the clamping shell means being such that each of the end flange means thereof is arranged to engage one of the respective projections of the respective retainer ring.
13. A pipe coupling according to any of claims 1, 2 or 3, wherein the retainer ring has a first axial end portion whose outside diameter is arranged to engage the interior of the sleeve, the opposite axial end portion of said retainer ring having a greater outside diameter than the inside diameter of the sleeve, said opposite axial end portion being formed as an axial stop member for the sleeve and including said collar portion; each axial end of the sleeve being provided with one retainer ring, each retainer ring comprising one of said projection means for engagement with the clamping shell means, the axial length of the clamping shell means being such that each of the end flange means thereof is arranged to engage one of the respective projections of the respective retainer ring.
14. A pipe coupling according to any of claims 1, 2 or 3, wherein the inside diameter of the retainer ring and/or of the sleeve end adjacent to the retainer ring is provided with an axially outwardly divergent conical enlargement, whereby the inside diameter of the retainer ring and/or of the sleeve end portion increases in the direction opposite to the direction of axial inserting of the retainer ring into the sleeve; the retainer ring having a first axial end portion whose outside diameter is arranged to engage the interior of the sleeve, the opposite axial end portion of said retainer ring having a greater outside diameter than the inside diameter of the sleeve, said opposite axial end portion being formed as an axial stop member for the sleeve and including said collar portion; each axial end of the sleeve being provided with one retainer ring, each retainer ring comprising one of said projection means for engagement with the clamping shell means, the axial length of the clamping shell means being such that each of the end flange means thereof is arranged to engage one of the respective projections of the respective retainer ring.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2831186A DE2831186C2 (en) | 1978-07-15 | 1978-07-15 | Ball joint pipe coupling |
| DEP2831186.6 | 1978-07-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1096901A true CA1096901A (en) | 1981-03-03 |
Family
ID=6044491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA331,702A Expired CA1096901A (en) | 1978-07-15 | 1979-07-12 | Pipe coupling |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA1096901A (en) |
| DE (1) | DE2831186C2 (en) |
| ZA (1) | ZA793004B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006050275A1 (en) * | 2006-10-23 | 2008-04-30 | Weinhold, Karl, Dipl.-Ing. | Clutch e.g. for connecting of two pipe ends or armature parts equipped with lateral bundled coils, has clip provided over ring and provides positive connection of tube ends or armature parts |
| CN104075058B (en) * | 2014-06-24 | 2016-03-02 | 陈墅庚 | Accurate compound pipe compensator |
-
1978
- 1978-07-15 DE DE2831186A patent/DE2831186C2/en not_active Expired
-
1979
- 1979-06-18 ZA ZA793004A patent/ZA793004B/en unknown
- 1979-07-12 CA CA331,702A patent/CA1096901A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| ZA793004B (en) | 1980-06-25 |
| DE2831186B1 (en) | 1979-11-22 |
| DE2831186C2 (en) | 1980-07-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |