GB1582839A - Pipe connections - Google Patents
Pipe connections Download PDFInfo
- Publication number
- GB1582839A GB1582839A GB45804/76A GB4580476A GB1582839A GB 1582839 A GB1582839 A GB 1582839A GB 45804/76 A GB45804/76 A GB 45804/76A GB 4580476 A GB4580476 A GB 4580476A GB 1582839 A GB1582839 A GB 1582839A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pipe part
- inner pipe
- outer pipe
- socket end
- spigot
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/66—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by liberation of internal stresses, e.g. shrinking of one of the parts to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
- B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
- B29C66/5229—Joining tubular articles involving the use of a socket
- B29C66/52296—Joining tubular articles involving the use of a socket said socket comprising sealing elements, e.g. gaskets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
- B29C66/5229—Joining tubular articles involving the use of a socket
- B29C66/52298—Joining tubular articles involving the use of a socket said socket being composed by several elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/53—Joining single elements to tubular articles, hollow articles or bars
- B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
- B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
-
- 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
- F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
- F16L47/12—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with additional locking means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
- B29C66/7371—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable
- B29C66/73715—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable heat-shrinkable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/24—Pipe joints or couplings
Description
(54) IMPROVEMENTS IN OR RELATIN G TO PIPE CONNECTIONS
(71) We, WAVIN B.V., a Dutch corporate body, of Handellaan 251, Zwolle,
Holland, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: This invention relates to pipe connections, and more particularly to tensile resistant pipe connections.
A tensile resistant pipe connector can be made by providing a coupling member between a socket end of a pipe component and a spigot inserted in the socket end, the socket end and the spigot being provided with respective grooves accommodating the coupling member and the socket and being provided with a further groove accommodating a sealing member forming a seal between the socket end and the spigot. A disadvantage of such an arrangement is that forces exerted by the coupling member on the socket end when the coupling member is functioning to resist tensile forces are transmitted to the portion of the socket end which is subjected to forces caused by the pressure of the fluid flowing through the connection.
An object of the invention is to enable this disadvantage to be avoided or at least reduced and to this end the invention includes a pipe coupling component comprising an inner pipe part which is fixed without gluing in an outer pipe part, the outer pipe part being provided at a socket end of the component with a groove for accommodating a coupling member for forming a tensile resistant connection between the outer pipe part and a spigot inserted in said socket end in use, and the inner-pipe part being provided at said socket end with a groove for accommodating a sealing member for forming a seal between the inner pipe part and such a spigot.
The invention also includes a pipe connection comprising a pipe coupling component as defined in the last preceding paragraph, a spigot inserted in the socket end of the component, a sealing member accommodated in the groove in the inner pipe part at the socket end, and a coupling member accommodated in the groove in the outer pipe part at the socket end, the sealing member- forming a seal between the inner pipe part and the spigot and the coupling member forming a tensile resistant connection between the outer pipe part and the spigot.
As will be appreciated in such a pipe connection the forces exerted by the coupling member are transmitted to the outer pipe part whilst the forces exerted by the pressure of the fluid substantially act upon the inner pipe part.
The invention also includes a method of manufacturing a pipe coupling component comprising fixing an inner pipe part without glue within an outer pipe part, providing the outer pipe part at a socket end with a groove for accommodating a coupling member, and providing the inner pipe part at said socket end with a groove for accommodating a sealing member.
Advantageously the outer pipe part is disposed around the inner pipe part and heat shrunk thereon whilst the inside diameter of the inner pipe part is maintained.
We are aware of pipe coupling com pdnents comprising inner and outer pipe parts which provide respective grooves for accommodating a sealing member and a coupling member, in which the inner pipe part is fitted within the outer pipe part by being screw threaded therein, and we make no claim to such components or to methods of manufacturing such pipe coupling com pones in which the inner pipe part is screw threaded into the outer pipe part in this application.
In order that the invention may be well understood, and embodiment thereof, which is given by way of example only, will now be described, reference being made to the accompanying drawings, in which: Figure 1 is an axial cross-section of a pipe connection; and
Figure 2 illustrates a step in the manufacture of a double-ended socket connector of the pipe connection shown in Figure 1.
In Figure 1 there is shown a tensile - resistant pipe connection comprising a pipe coupling component formed as a doubleended socket connector 1, i.e. provided with two socket ends at opposite ends of the component. and two spigots.
The connector 1 comprises an inner pipe part 3 and an outer pipe part 2, both of which are of a plastics material such as polyvinylchloride. The inner pipe part is fixed within the outer pipe part without gluing by being clamped therein by the outer pipe part. To achieve this in the illustrated connector, the outer pipe part 2 is formed from a length of pipe of the same inside and outside diameters as the inner pipe part 3 which length of pipe is widened out, disposed around the inner pipe part 3 with its ends protruding axially outwardly of the ends of the inner pipe part and then shrunk on to the inner pipe part 3.
A groove 10, 20 is provided at each socket end of the connector 1 in the outer pipe part for accommodating a coupling member 11, 21 formed of polyethylene for forming a tensile resistant connection between the outer pipe part 2 and the spigot 13 inserted in the socket end, the spigot being provided with a groove 14 formed in a sleeve 12 secured to the spigot which groove 14 also accom modates the coupling member. A groove 8 is also provided at each socket end in the inner pipe part 3 for accommodating a sealing member 9 for forming a seal between the inner pipe part and the spigot inserted in the socket end.
The coupling member 21 is illustrated in.
an unstressed condition whereas the coupling member 11 is illustrated in a. stressed condition functioning to form a tensile resistant connection between the outer pipe part and the spigot which are being subjected to forces tending to move the spigot axially out of the socket end. Each coupling member 11, 21 is formed so that when the connection is subjected to an 'increasing tensile load tend ing to move the spigot axially out of the socket end the coupling member will plastically deform prior to any plastic deformation occuring in the spigot or socket end.
Figure 2 illustrates the formation of the connector 1, and shows a mandrel 4 having three consecutive portions 4a, 4b and 4c of.
increasing outside diameter which join stepwise. The middle one 4b of the mandrel portions has an outside diameter corresponding to the inside diameter of the inner pipe part 3 and maintains this inside diameter during formation of the connector. A retention ring 5 which has an inside diameter which is substantially equal to the outside diameter of the mandrel portion 4c with the smallest outside diameter and an outside diameter which does not exceed the outside diameter of the inner pipe part 3 zand can be less as illustrated, fits on the mandrel portion 4c to retain the inner pipe part .3 on the mandrel portion 4b. The' pipe length for forming the outer pipe part is heated and pushed over the ring 5, which is tapered as shown at 6,
and the inner pipe part 3 so as to extend over both the mandrel portion 4a with the largest outside diameter and the ring 5 with a pusher member 7 which has inner and outer diameters corresponding substantially with those of the outer pipe part 2. The pipe length forming the outer pipe part 2 is shrunk on to the inner pipe part 3. and since the
outer pipe part 2 protrudes axially outwardly of the ends of the inner pipe part and originated as a pipe length with the same inside and outside diameters as the inner pipe part, its central portion clampingly co-operates with the inner pipe part 3 to fix the latter within the outer pipe part.
The above-described method prestresses the inner pipe part and this advantageously allows the inner pipe part, which is subjected to fluid pressure, to be reduced in thickness.
The mandrel portions are removed and the grooves 8 in the inner pipe part and the grooves 10 and 20 in the outer pipe part are provided for accommodating the sealing and coupling members.
Grooves 10 and 20 for the coupling members can be provided in the outer pipe part during the formation of the connector on the mandrel by providing a suitable annular projection on the mandrel portion 4a, as illustrated in Figure 2, and on the ring 5 (not illustrated).
The connector 1 shown in Figure 1 has the: advantage that forces exerted by the coupling members 11, 21 are transmitted to the outer pipe part. 2 and forces exerted by the pressure of the fluid substantially act on another pipe part, the inner pipe part 3, so that the two functions of sealing and tensile resistance are separated from each other.
Moreover, weakening of the outer pipe part is avoided by fixing the inner pipe part in the outer pipe part without glue.
Attention is directed to" the claims of the complete specification of co-pending Application No. 17531/79 (Serial No. 1,582,840) which is divided out of this application.
Subject to the foregoing disclaimer, WHAT WE CLAIM IS': 1. A pipe coupling component comprising an inner pipe part which is fixed without gluing in an outer pipe part, the outer pipe part being provided at å socket end of the component with a groove for accommodåt ing a coupling member for forming a tensile resistant connection 'between. the outer pipe part and a spigot inserted in said socket end in use, the-inner pipe part being pro- vided at said socket' 'end with a groove for accommodating 'a" sealing member for forrn- ing a seal between the inner pipe part and such a spigot. ' ' 2. A pipe coupling component according to claim 1, having two saidrsocket-ends at
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (12)
1. A pipe coupling component comprising an inner pipe part which is fixed without gluing in an outer pipe part, the outer pipe part being provided at å socket end of the component with a groove for accommodåt ing a coupling member for forming a tensile resistant connection 'between. the outer pipe part and a spigot inserted in said socket end in use, the-inner pipe part being pro- vided at said socket' 'end with a groove for accommodating 'a" sealing member for forrn- ing a seal between the inner pipe part and such a spigot. ' '
2. A pipe coupling component according to claim 1, having two saidrsocket-ends at
opposite ends of the component, wherein at each socket end the inner pipe part is provided with a said groove for accommodating a said sealing member and the outer pipe part is provided with a said groove for accommodating a coupling member.
3. A pipe coupling component according to claim 1 or 2, wherein the inner pipe part is fixed within the outer pipe part by being clamped therein by the outer pipe part.
4. A pipe coupling component according to claim 1, 2 or 3, wherein the inner pipe part is fixed within the outer pipe part by shrinking the outer pipe part on to the inner pipe part.
5. A method of manufacturing a pipe coupling component, comprising fixing an inner pipe part without glue within an outer pipe part, providing the outer pipe part at a socket end with a groove for accommodating a coupling member, and providing the inner pipe part at said socket end with a groove for accommodating a sealing member.
6. A method according to claim 5, wherein the outer pipe part is clamped around the inner pipe part.
7. A method according to claim 5 or 6, wherein the outer pipe part is disposed around the inner pipe part, and shrunk thereon whilst the inside diameter of the inner pipe part is maintained.
8. A method according to claim 7, wherein the inner pipe part is disposed on a mandrel having an outer diameter substantially equal to the inside diameter of the inner pipe part, the inner pipe part is secured against displacement, and subsequently a heated outer pipe part is slid over the inner pipe part and shrunk thereonto to form said socket end and to fix the inner pipe part within the outer pipe part.
9. A pipe connection comprising a pipe coupling component as claimed in any one of claims 1 to 4, a spigot inserted in the or each socket end of the component, a sealing member accommodated in the groove in the inner pipe part at the or each socket end, and a coupling member accommodated in the groove in the outer pipe part at the or each socket end, the or each sealing member forming a seal between the inner pipe part and the or each respective spigot and the or each coupling member forming a tensile resistant connection between the outer pipe part and the or each respective spigot.
10. A pipe coupling component substantially as herein described with reference to
Figure 1 of the accompanying drawings.
11. A pipe connection substantially as herein described with reference to Figure 1 of the accompanying drawings.
12. A method of manufacturing a pipe coupling component substantially as herein described with reference to Figure 2 of the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB45804/76A GB1582839A (en) | 1976-11-03 | 1976-11-03 | Pipe connections |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB45804/76A GB1582839A (en) | 1976-11-03 | 1976-11-03 | Pipe connections |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1582839A true GB1582839A (en) | 1981-01-14 |
Family
ID=10438670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB45804/76A Expired GB1582839A (en) | 1976-11-03 | 1976-11-03 | Pipe connections |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1582839A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4717182A (en) * | 1985-05-10 | 1988-01-05 | Rheinische Braunkohlenwerke Ag | Plastic coupling sleeve for pipes |
| WO1994013457A2 (en) * | 1992-12-08 | 1994-06-23 | Hepworth Building Products Limited | Joint, method of forming a joint and method of forming joint components |
-
1976
- 1976-11-03 GB GB45804/76A patent/GB1582839A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4717182A (en) * | 1985-05-10 | 1988-01-05 | Rheinische Braunkohlenwerke Ag | Plastic coupling sleeve for pipes |
| WO1994013457A2 (en) * | 1992-12-08 | 1994-06-23 | Hepworth Building Products Limited | Joint, method of forming a joint and method of forming joint components |
| WO1994013457A3 (en) * | 1992-12-08 | 1994-09-15 | Hepworth Building Prod | Joint, method of forming a joint and method of forming joint components |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |