NL1017407C2 - The coupling system comprises insert part and part for its reception. Either one or other part has ring-shaped groove, in which O-ring is fitted - Google Patents

The coupling system comprises insert part and part for its reception. Either one or other part has ring-shaped groove, in which O-ring is fitted Download PDF

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Publication number
NL1017407C2
NL1017407C2 NL1017407A NL1017407A NL1017407C2 NL 1017407 C2 NL1017407 C2 NL 1017407C2 NL 1017407 A NL1017407 A NL 1017407A NL 1017407 A NL1017407 A NL 1017407A NL 1017407 C2 NL1017407 C2 NL 1017407C2
Authority
NL
Netherlands
Prior art keywords
part
ring
coupling assembly
receiving part
receiving
Prior art date
Application number
NL1017407A
Other languages
Dutch (nl)
Inventor
Lieuwe Tamminga
Adriaan Willem Van Den Berg
Original Assignee
Hollandsche Betongroep Nv
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hollandsche Betongroep Nv filed Critical Hollandsche Betongroep Nv
Priority to NL1017407A priority Critical patent/NL1017407C2/en
Priority to NL1017407 priority
Application granted granted Critical
Publication of NL1017407C2 publication Critical patent/NL1017407C2/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L37/00Couplings of the quick-acting type
    • F16L37/08Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
    • F16L37/12Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members using hooks, pawls or other movable or insertable locking members
    • F16L37/14Joints secured by inserting between mating surfaces an element, e.g. a piece of wire, a pin, a chain
    • F16L37/142Joints secured by inserting between mating surfaces an element, e.g. a piece of wire, a pin, a chain where the securing element is inserted tangentially
    • F16L37/148Joints secured by inserting between mating surfaces an element, e.g. a piece of wire, a pin, a chain where the securing element is inserted tangentially the securing element being flexible
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00Joints with sleeve or socket
    • F16L21/02Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings
    • F16L21/035Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings placed around the spigot end before connection
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L37/00Couplings of the quick-acting type
    • F16L37/08Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
    • F16L37/084Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
    • F16L37/088Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of a split elastic ring

Abstract

The coupling system (6) comprises an insert part and a part for its reception. Either the one or the other part has a ring-shaped groove in which an O-ring is fitted. In the one or the other of the parts, a further groove is provided at an axial distance from the ring-shaped groove and a further O-ring is fitted in it. The effective sealing diameters of the two O-rings are different. The engagement surfaces of the grooves for the O-rings can be stepped to improve grip or are purely cylindrical. The coupling system is for the parts (5) of a pipe used for transporting cement or grout into a borehole (2).

Description

Coupling assembly.

The present invention relates to a coupling assembly comprising an insertion part and a receiving part receiving the insertion part, wherein the insertion part or receiving part is provided with an annular groove in which an O-ring is arranged.

Such a coupling assembly is generally known in the art. With the help of O-rings, even with changing fluid pressure, it can be guaranteed that a perfect seal is always present. Such seals can be used for all kinds of coupling assemblies. An example is the use in constructing a pipeline consisting of pipe sections. Another example is the provision of a pipeline for placing grout or other curing mixture in a borehole in order to produce a supporting pile or the like on site. High demands are made on the coupling assembly. Given the material used, there must be sufficient clearance to allow easy assembly and disassembly. Moreover, the O-ring and the associated engagement surface are subjected to abrasive wear due to any granular particles in the pumped material. It is important that the coupling is properly closed. This is particularly important if a mixture of cementitious material and water is used. Water leaks relatively easily in the event of a leak, which can result in a lack of water. Due to the loss of water, the mixture becomes less and less fluid. This is at the expense of the transportability of the mixture and the flowing out of the mixture into the borehole. In a further segregated state, the quality of the material and the curing process can no longer be guaranteed.

On the other hand, such pipes are constructed and broken down a large number of times so that the couplings must be wear-resistant.

It is the object of the present invention to provide a coupling assembly that meets the above-mentioned requirements, that is to say that the coupling assembly can be easily assembled and disassembled and, even after repeated disassembly and assembly, still a leak-tight connection provided.

This object is achieved with a coupling assembly described above in that said insertion part or receiving part is provided with a further groove axially spaced from said annular groove, in which a further O-ring is accommodated, wherein the effective sealing diameter of said O-rings is different.

According to the present invention, two axially spaced O-rings are used per seal, which are arranged in the respective grooves. The effective diameter of the O-rings differs. This means that during the insertion of the insertion part into the receiving part, a relatively large diameter difference exists during a large part of the insertion movement. Only when the end of the insertion stroke is approached, ie at the end of the joining operation, does the diameter difference decrease to the desired fit. Thereby engagement takes place between the O-ring and the respective engagement surface of the receiving part or insert part. As a result, the O-rings are brought into sliding engagement with the opposite part over only a short distance, which considerably limits wear. On the other hand, a solid centering of the parts relative to each other is guaranteed. Moreover, the presence of a contamination does not pose a major problem as a result of this measure, because during the first part of bringing together the parts to be coupled, the diameter difference between the insert part and the receiving part is such that it is not hindered and the risk of contamination occurring during the last part of the coupling operation is still present, is relatively small.

Although it is in principle possible for both or one of the parts to run continuously conically, according to an advantageous embodiment of the invention, the diameter of either the receiving part or the insertion part is of a stepped design.

The engagement surface of the receiving part or insert part with the O-ring can have any shape known in the state of the art. However, according to an advantageous embodiment of the invention, this is cylindrical, i.e. not conical.

With a stepped design this means that two cylindrical surfaces of different diameter are present in the part on which the O-rings engage and that an offset in diameter takes place between them. This can be step-shaped, but according to an advantageous embodiment of the invention, all this is conical.

'01? * ° T

3

According to a further advantageous embodiment of the invention, the surfaces of the insertion part and receiving part that are facing each other are substantially similar. That is, after the two parts have been fully assembled, there is support over a considerable length in the axial direction between the two parts, whereby the stability of the coupling and thus of the seal is promoted. This possibly concerns an exception for oblique parts in which an air gap is built in to prevent the structure from being over-defined and more particularly to prevent two cone-like parts of the receiving part and insert part coming against each other. As a result, the length of the engagement surface between the two parts would be considerably limited.

According to a further advantageous embodiment of the invention, locking means are present which connect the insertion part and receiving part to each other in coupled condition. These locking means can comprise any construction known in the state of the art. According to an advantageous embodiment of the invention, there is a groove part in both the insert part and the receiving part, which, when the coupling is completely assembled together, form a complete groove. A ring may be provided in such a growth device that hinders moving back apart.

The insertion part and / or the receiving part can be manufactured in a particularly simple manner. According to an advantageous embodiment, these are manufactured in a separate step and later connected to a pipe part. This joining technique can include screws and the like, but preferably welding is used for this purpose. The pipe parts obtained in this way can be combined into a pipeline with which, for example, a borehole can be filled with curing material in the manner described above. However, it should be understood that a coupling assembly according to the present invention also has many other applications.

The invention will be explained in more detail below with reference to an exemplary embodiment shown in the drawing. In the drawings: Fig. 1 shows diagrammatically the use of a pipeline according to the invention; Fig. 2 shows a detail of the coupling assembly according to Fig. 1 in a cross-section in the exploded state; and Fig. 3 shows a coupling assembly according to Fig. 2 in the assembled state.

Λ 017 4 0 7 4

Fig. 1 shows a borehole 2 arranged in bottom 1. The dimensions of this borehole are shown out of proportion. This borehole is intended to be filled with a hardening material such as a cementitious material or grout material.

The resulting column can then serve as a foundation for a building or the like.

For the application of the hardening material 3, a pipeline 4 is provided in the borehole 2. This is composed of pipe parts 5 which are connected to each other with the aid of coupling assemblies 6 according to the invention.

Details of the coupling assembly are shown in Figs. 2 and 3.

Reference numeral 10 denotes the insertion part of the coupling assembly, while numeral 9 denotes the receiving part. Both parts are connected to the relevant pipe part by means of a weld 8.

Two grooves 11 and 12 are arranged in the circumference in the insert part 10. These are designed to receive O-rings 14 and 15. The insert part is provided with a substantially cylindrical outer surface provided with two chamfers 16, 17, whereby the diameter of the cylindrical parts is always reduced. A groove part 24 is furthermore present.

The receiving part 9 is also a stepped cylindrical design and comprises flat parts 20 and 21 for engagement with the O-rings 12 and 11. The diameters of these flat parts are such that the O-rings are optimally pressed in for sealing. Overrun chamfers 18 and 19 are also present here. As can be seen from Fig. 3, the run-on chamfers 18 and 19 are slightly offset relative to run-on chamfers 16 and 17 so as to limit a free space in the coupled state. A groove part 13 is present.

The free end of the insertion part 10 and the receiving part 9 are provided with a search edge 22.

Both parts are provided with mutually adjacent flat parts. For example, insert part 10 is provided with flat parts 25 and 27 and the receiving part 9 with flat parts 26 and 28. The tolerances on the diameters of the corresponding flat parts 25, 26 and 27, 28 are such that, due to the minimal clearance present as a result The coupling is very stable and any transverse forces on the pipe parts can be absorbed by the coupling assembly without the sealing action of the O-rings being influenced. The O-rings are optimally loaded so that sealing is guaranteed.

11017407 5

When inserting the insert part 10 into the receiving part 9 (Fig. 2), there is initially a considerable diametrical play between the two parts. Only during the last part of the stroke, which can for instance be 10-20 mm, the diameter difference is relatively small. The length of this last part of the insertion stroke corresponds to the necessary length of the flat parts 20, 21 on which the O-rings 15 and 14 respectively bear. Due to this relatively short path over which this small diameter difference exists, simple coupling and uncoupling is possible. In the coupled state, the groove parts 13 and 24 form a complete groove in the circumference into which a ring 23 can be inserted for locking 10 of the insert part 10 to the receiving part 9.

With the construction described above, it is no longer necessary to establish a coupling with the aid of screws or the like. A very good tolerance can be guaranteed over a small range, so that the seal is also guaranteed. Moreover, the insertion part and the receiving part engage each other over a considerable axial length, so that only very slight movement between the two parts is possible in the assembled state. With the construction according to the invention, due to the relatively great freedom of movement during the joining of both parts, damage can be prevented and contamination can be limited. Due to the presence of two O-rings, sealing can be guaranteed under all circumstances. With the coupling assemblies according to the present invention, pipelines with any desired length can be manufactured. A value of 30 meters and more is mentioned as an example. The diameter is of course dependent on the application and as an example a value of approximately 30 cm is mentioned. With such a diameter, the clearance between the non-abutting corresponding flat parts of the insert part and the receiving part is preferably approximately 1 mm. The adjacent flat parts are then provided with suitable tolerances, for example 0.2 - 0.4 mm on the diameter.

It will be understood that these dimensions, depending on the application and diameter of the tube and length of the tube, as well as axial length over which the insertion part and receiving part engage each other, can be adapted to each other. Moreover, it will be understood that numerous changes to the above can be made which are immediately clear to those skilled in the art and are within the scope of the appended claims.

1017407

Claims (10)

  1. A coupling assembly (6) comprising an insertion part (10) and a receiving part (9) receiving the insertion part, wherein the insertion part or receiving part is provided with an annular groove (11,12) in which an O-ring (14,15) ), characterized in that said insertion part or receiving part is provided with a further groove (12, 11) axially spaced from said annular groove, in which a further O-ring (15, 14) is accommodated sealing diameter of those O-rings is different. 10
  2. 2. Coupling assembly as claimed in claim 1, wherein the diameter of said receiving part and / or said insert part is designed in a stepped manner in order to provide an engagement surface for said O-ring and further O-ring.
  3. 3. Coupling assembly as claimed in any of the foregoing claims, wherein the engaging surface for said O-ring of said insert or receiving part is substantially cylindrical.
  4. 4. Coupling assembly according to claim 3, wherein a tapered-out part (16-19) is arranged on said cylindrical part in the direction of releasing said coupling.
  5. 5. Coupling assembly as claimed in any of the foregoing claims, wherein said insert part or receiving part 25 cooperating with the receiving part or insert part is designed with a corresponding shape.
  6. 6. Coupling assembly as claimed in any of the foregoing claims, wherein the insertion part and the receiving part are designed with mutually corresponding adjacent flat parts (25-28), with such mutual tolerance that these flat parts provide stability of the coupling and thereby optimum load on the O-rings. H01T407
  7. Coupling assembly according to one of the preceding claims, comprising locking means.
  8. Coupling assembly according to claim 7, wherein said locking means 5 comprise, in the coupled state of said receiving and insertion part, a groove (13, 14) bounded by said parts, in which a locking ring (23) is arranged.
  9. Coupling assembly according to one of the preceding claims, wherein the receiving part and / or insert part is welded to a pipe part (5). 10
  10. A pipeline for transporting grout in a borehole (2) built up of pipe sections (5) coupled to a coupling assembly (6) according to one of the preceding claims. % t) i y i 7
NL1017407A 2001-02-20 2001-02-20 The coupling system comprises insert part and part for its reception. Either one or other part has ring-shaped groove, in which O-ring is fitted NL1017407C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL1017407A NL1017407C2 (en) 2001-02-20 2001-02-20 The coupling system comprises insert part and part for its reception. Either one or other part has ring-shaped groove, in which O-ring is fitted
NL1017407 2001-02-20

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL1017407A NL1017407C2 (en) 2001-02-20 2001-02-20 The coupling system comprises insert part and part for its reception. Either one or other part has ring-shaped groove, in which O-ring is fitted

Publications (1)

Publication Number Publication Date
NL1017407C2 true NL1017407C2 (en) 2002-08-22

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NL1017407A NL1017407C2 (en) 2001-02-20 2001-02-20 The coupling system comprises insert part and part for its reception. Either one or other part has ring-shaped groove, in which O-ring is fitted

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1443254A1 (en) * 2003-01-29 2004-08-04 BSH Bosch und Siemens Hausgeräte GmbH Plug-in connector for water pipes
WO2007040408A1 (en) * 2005-10-05 2007-04-12 Kongsberg Automotive As Press-in coupling arrangement
CN109624075A (en) * 2018-12-04 2019-04-16 金华送变电工程有限公司 A kind of Portable omni-directional concrete discharging conduit device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7817051U1 (en) * 1978-06-07 1980-08-28 Voss Armaturen Connecting device for brake lines
US5681060A (en) * 1994-01-29 1997-10-28 Armaturenfabrik Hermann Voss Gmbh & Co. Plug-in connector for a pressure pipe system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7817051U1 (en) * 1978-06-07 1980-08-28 Voss Armaturen Connecting device for brake lines
US5681060A (en) * 1994-01-29 1997-10-28 Armaturenfabrik Hermann Voss Gmbh & Co. Plug-in connector for a pressure pipe system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1443254A1 (en) * 2003-01-29 2004-08-04 BSH Bosch und Siemens Hausgeräte GmbH Plug-in connector for water pipes
WO2007040408A1 (en) * 2005-10-05 2007-04-12 Kongsberg Automotive As Press-in coupling arrangement
CN109624075A (en) * 2018-12-04 2019-04-16 金华送变电工程有限公司 A kind of Portable omni-directional concrete discharging conduit device

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Effective date: 20050901