荷兰专利NL1039647A CONNECTION FITTING.

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专利摘要:

公开号:NL1039647A
申请号:NL1039647
申请日:2012-06-04
公开日:2012-12-10
发明作者:Oliver Otte；Cathrin Wink
申请人:Wavin Bv；
IPC主号:

专利说明:

Short indication: Connection fitting
The invention relates to a connection fitting according to the preamble of claim 1.
Such connection fittings are used in installation technology, in particular household technology, for connecting pipes to devices, distributors and the like or also for connecting pipes to each other. From a practical point of view, the connection technique is simple to implement, because the pipe to be connected is placed on a fitting support and is generally also stabilized by a surrounding pressing sleeve, fixed and pressed against the fitting support. A fitting body, from which the fitting support starts, can be very different as required. As a pipe connector, this can include a second fitting support or even more. It can also be provided, for example, with a screw or weld nipple on a device connection.
The seal between fitting supports and the inner wall of the pipe is guaranteed with sealing rings, which are usually in the form of O-rings (seals with a circular cross-section), placed on the fitting supports against the inner wall of the pipe in a part-circular groove. For the purpose of improving the sealing action, from a practical point of view also double-made sealing rings are arranged one behind the other on the fitting supports with an axial displacement.
For various fluids such as, for example, gas and water (or also heating oil, etc.), different sealing rings are required, which are also regularly colored, for example with yellow for gas pipe seals. To this end, different sealing rings are provided for the installation of pipelines for different fluids and, on a regular basis, separate connection fittings are also required if assembly of sealing rings on site should be excluded. This leads to a higher effort in terms of preparation and to higher storage costs.
It is even more critical that, with regard to the standardized pipe-inner diameters, in practice changes can occur if, for example, a connection fitting for a gas installation is processed in a water installation or vice versa due to negligence or also for the sake of convenience. This danger is particularly great in domestic installations where gas and water pipes, possibly also fuel oil pipes and other pipes with the same pipe inner diameters are laid.
SUMMARY OF THE INVENTION It is therefore an object of the invention to provide connection fittings which, although easy to apply in a known manner, but which do not allow for confusion and incorrect installation, and which also simplify preparation and storage, without thereby limiting the sealing technique or the sealing security is being taken for granted.
This object is solved by a connection fitting according to the preamble of claim 1, with the characteristic features of claim 1. With the inventive solution it is achieved that the same connection fittings can be used for different fluids, for example for gas and for water. It is decisive that the same sealing rings are not fitted twice on a fitting support here, but different sealing rings, one of which, for example, is intended for sealing a gas pipe, and another for sealing a water pipe. In this case, the second sealing ring is not functionless in any application, but rather the sealing rings arranged with an axial displacement on the fitting supports cooperate in such a way that the sealing ring located at the end of the support largely shields the sealing ring behind it or sealing ring remote from the fitting support provides at least one pressure relief for the other sealing ring.
Consequently, this not only provides a simplification of the preparation and storage of the connection fittings and a simplification of handling. In particular, assembly errors due to changing the fittings can be excluded.
In the case of a connection fitting for gas and water installations, it can be provided in an advantageous manner that the sealing ring for water pipes, in comparison with the sealing ring for gas pipes, is located on the side located towards the end of the fitting supports, i.e. with respect to the fluid in advance in the inner part. of the pipe. In water installations, therefore, the common gas seal which is thorny due to the material composition and also with regard to the sealing seat is not exposed to the water. Similarly, in gas pipe installations, contamination particles, suspended solids or even aggressive gas components are kept as far away as possible from the gas seal.
The sealing rings can advantageously be made from different materials. Typically, the sealing ring is made of an elastic material that is compliant with the material of the fitting supports and of the pipe to be fitted. The fitting support can herein be made of plastic with a simple manufacturing technique, in particular injection molding, as well as with good chemical resistance to fluids such as gas and water. However, metal versions, in particular brass versions, are also applicable and customary. In practice, the pipe to be inserted is predominantly a plastic pipe or a plastic-metal-connected pipe, such as is desired for particularly high pressures or also for diffusion density of the pipe for heating installations. (Different) gasket rings for gas and water to be fitted between them are advantageously (and commercially available) made of elastomeric material, which, however, in view of their resistance to gas or water and also in terms of their shelf life for the two different seals can be of different designs.
For a robust use as a water seal, the corresponding seal ring can be made of a silicone rubber, an elastomer or other plastic from the area of the polyamides, the methacrylate resins or epoxy resins. On the other hand, a gas seal, also a gas seal behind it, is generally modified at least by special additives.
A conventional sealing material for a water seal consists of an ethylene / propylene diene terpolymer (EPDM), which in an additive-modified version can also advantageously be provided for the gas seal.
It can be determined practically that the sealing ring located closer to the end of the fitting support is made of both a water-resistant and gas-resistant elastomer. In every application it is thus achieved that the sealing ring remains resistant to gas as well as to water.
The different sealing rings can also be different with regard to their cross-sections. Similarly, the sealing rings can be arranged in grooves with different groove cross sections on the fitting supports, so that pressure and flow loads on the side of the fluid can be accommodated (differently) in terms of load, even when the cross sections of the pipes to be fitted can match.
The fitting support on the circumference can practically comprise a profiling. Conventional fitting supports often show a circumferential profile with a saw-tooth profile in the longitudinal section, which facilitates the insertion of a pipe under friction and slight erosion, but counteracts a release movement.
Advantageously, such a connection fitting can be provided in the usual manner with a pressure sleeve which encloses the fitting supports with a predetermined distance, in order to press the inserted pipe tightly against the fitting supports (and the seals present thereon). Such a pressing sleeve can comprise fixed or detachable connections to the fitting body, in order to also fix the pipe end axially from outside. To this end, a fixed seat opposite the inserted pipe, in particular a pressing seat, helps, which effect, in particular with plastic pipes inserted, is already determined by the cross-sectional dimensioning. However, there are also pressure sleeves made of deformable materials, for example made of aluminum or steel, which are radially deformed after assembly and only then come to rest firmly against the outer casing of the pipe inserted thereon.
For the sake of clarity, the particularly well-known common installation of gas and water pipes has been taken into account above. It is clear that the same applies if, for example, other pairs of fluids such as gas and fuel oil or water and fuel oil are used side by side. It is even conceivable that connection fittings for three or more different fluids are made uniform, while correspondingly three or more different sealing rings are arranged on the fitting supports.
Insofar as the case of two (different) sealing rings has been dealt with here in the above reflection, a multiplication of sealing rings, such as this multiplication, for example, was usual when doubling the water seals or gas seals under the point of mutual relief and security not be excluded by redundancy. Apparently, however, the various sealing rings also provide alternating relief for a particular application and also a considerable redundancy.
An exemplary embodiment of the invention is shown in the drawing and is further described below. Show in the drawing:
FIG. 1 a longitudinal section through a connection fitting, on the left-hand side without sealing rings and
FIG. 2 a connection fitting according to FIG. 1 with a pipe end inserted on one side.
A connection fitting, which is always indicated in its entirety in the drawing by 1, represents a pipe connector for two (equal) pipes, this pipe structure being entirely straight and in the form of a pipe and a short fitting body 2 as a central part comprising axially protruding fitting supports 3 and 4 on both sides . Press fittings of the relevant type are concerned with the reliable sealing and mechanical end connection of installation pipes with the aid of at least one fitting support.
This can then, as here, be combined with a second fitting support or several for connecting further pipe ends, with a screw or welding nipple or with another device part.
The fitting supports are each provided on the support circumference with sealing grooves 5, 6 resp. 7, 8, wherein the seal grooves 5 and 6 are equipped with seals 9, 10, and the grooves 7, 8 are not yet shown equipped. In addition, each fitting support is coaxial with a press sleeve 11 resp. 12, which, at the axial transition thereof to the fitting body 2, each time form-fitting with a locking ring 13, respectively. 14 is connected if a radially inwardly swung-up end edge of the metal pressure sleeves 11 and 12 in an outwardly open ring groove of the locking ring 13 and 14 respectively. 14.
In turn, the locking ring at the end of the fitting supports is 3 resp. 4 anchors on the fitting body, wherein it has an annular inner surface 15 and 16 respectively. 16 is placed on a corresponding annular outer surface of the fitting body 2 and is thereby fixed in a radial sense, while a ring thickening of the ring thickenings 17 and 16 respectively. 18 forms a stop axially towards the further fitting body 2. Up to this stop, the locking ring 13 resp. 14 from the end of the fitting supports 3 resp. 4, because the ring surfaces 15, 16 are wider in cross-section than the respective fitting supports 3 and 4, respectively. 4. The securing ring 13 furthermore comprises the securing ring 14 as well as one of the ring projections 17 and 16 respectively. 18 distant protrusion 19 resp. 20 a locking nose 21 resp. 22 which engages the fitting supports at the edge thereof radially inward in a radially inwardly open groove of the fitting body, so that the locking ring 13 and the locking ring 14 can be axially and radially fixed in this end position.
The above-described embodiment is within the scope of conventional embodiments, wherein the pressing sleeves 11, 12, as well as the locking rings, as well as in the present case the part-shaped embodiment of fitting body 2 and fitting supports 3, 4 in known manner from plastic or can also be made from metal, for example from brass.
The sealing rings 9 and 10 are described here as so-called O-rings and also as usual, but these can also be rings with other cross-sections and are typically provided with application specifically adjusted elastomers which, depending on the passage through the pipe medium such as gas or water (or oil ...) may differ in material and may also vary in dimensions.
The use of double sealing rings has already occurred in practice, although even with a double arrangement of sealing rings the same sealing rings are provided with the result that with regard to the different requirements and loads when sealing gas or water pipes (or also oil pipes) case-specific different materials and possibly also different dimensions and cross-section sizes are provided. Accordingly, for example in household installations, a distinction is made between gas and water installations and accordingly a separate assortment of connection fittings is in stock for each medium, but at least an assortment of different seals, if the fitting of the fitting supports with sealing rings is to be carried out on site .
The present embodiment according to the invention provides that different requirements can be covered by the two sealing rings 9 and 10 on the fitting supports 3 and a sealing ring for a water pipe and a sealing ring for a gas pipe is provided. In principle, this means that it can be achieved in a simple and reliable manner that uniform fittings can be used for both gas and water pipe installations.
It has been found to be particularly advantageous if the sealing ring 9 located at the end of the fitting support is a sealing ring for a water pipe, while the sealing ring 10 facing the fitting body 2 is a sealing ring for a gas pipe. When the fitting is inserted in water pipes, the sealing ring 9 is exposed to the water, but it is also constructed for this purpose. The sealing ring 10 constructed for gas pipes then lies, insofar as it is sheltered, in the "dry" region, but thereby provides a pressure relief of the sealing ring 9 from the rear. On the other hand, the sealing ring 10 determines the sealing in gas pipes. the preceding (water) sealing ring 9 protects against dirt and moisture and also relieves pressure. This makes it possible to drastically simplify the storage and handling of the fitting, particularly in the case of household connections with gas and water pipe systems with uniform cross-sections, and in particular also in the case of customary different and carefully disassembled fittings, which cannot be confused with mismatched sealing rings are not even recognizable after assembly and are only damaged after a long time.
In FIG. 2 shows the connection fitting 1 with a pipe 23 inserted. The pipe shown is a plastic-metal connection pipe, the inner diameter of which is decisive for the seal being determined by the inner plastic layer 24, while a thin enclosed metal layer 25 determines the diffusion density, but also the mechanical load-bearing capacity, the aging resistance and the pressure resistance improves.
The connection technique for such a pipe end 23 with the aid of a fitting 1 is simple. Thus, the pressing sleeve 11 with the locking ring 13 can already be fitted with the remaining fitting 1 in the embodiment shown in FIG. 1 shown in FIG. 1 before the pipe end 23 is axially engaged or disengaged. is shifted. A widening 26 on the front eases the sliding, but in particular the pressing sleeve 11 has a radial excess on the inside opposite the pipe end 23 so as to allow the pipe end 23 to pass freely during the sliding. The sliding movement noticeably ends when the pipe end 23 comes into contact with the locking ring 13 with its end edge.
The pressing sleeve is then pressed in if it is radially flattened with the aid of a pressing tool and consequently plastically deformed.
The connection is then made in the provided manner and the sealing rings 9 and 10 provide a seal on the inside of the pipe, while the pressing sleeve 11 props from the outside of the pipe end 23 and thereby both the pressure against the seals and also the support of the seals. pipe end against transverse and bending loads.

权利要求:
Claims (9)
[1]
Connection fitting (1) for pipes (23) for passage of different fluids, in particular gas or water installations, with a fitting body (2) and at least one of the fitting body (2) protruding into a pipe (23) ) end-to-be-plugged fitting support (3), on which at least two sealing rings (9, 10) are arranged axially relative to each other, with gas-ring sealing rings (9, 10) having different design with respect to water-pipe sealing rings, characterized in that different sealing rings (9, 10) are arranged on the fitting support (3), namely at least one sealing ring (10) for gas pipes and also at least one sealing ring (9) for water pipes.
[2]
Connection fitting (1) according to claim 1, characterized in that the sealing ring (9) for water pipes is located on the side facing the end of the fitting support (3) with respect to the sealing ring (10) for gas pipes.
[3]
Connection fitting (1) according to claim 1 or 2, characterized in that the sealing rings (9, 10) are made of different materials.
[4]
Connection fitting (1) according to claim 1,2 or 3, characterized in that the sealing rings (9, 10) have different cross-sections.
[5]
Connection fitting (1) according to one of claims 1-4, characterized in that the sealing rings (9, 10) are mounted in grooves (5, 6) with different groove cross-sections.
[6]
Connection fitting (1) according to one of claims 1 to 5, characterized in that the sealing ring (9) located closer to the end of the fitting support is made of both a water-resistant and gas-resistant elastomer.
[7]
Connection fitting (1) according to one of claims 1 to 6, characterized in that the fitting support (3) has a profiling on its periphery.
[8]
Connection fitting (1) according to one of claims 1 to 7, characterized by a pressing sleeve (11) enclosing the fitting support with a predetermined radial distance.
[9]
Connection fitting (1) according to claim 8, characterized in that the pressing sleeve (11) is connected to a locking ring (13) at the end axially facing the fitting body (2), which is a stop for a pipe end to be slid in ( 23) and is fixed with the fitting body (2) by a thickening (17) and a fixation (21).

类似技术:

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同族专利:

公开号 | 公开日

NL1039647B1|2016-07-13|

DE102012010647A1|2012-12-06|

DE202011107346U1|2012-09-07|

引用文献:

公开号 | 申请日 | 公开日 | 申请人 | 专利标题

DE29822053U1|1998-12-10|2000-04-13|Unicor Rohrsysteme Gmbh|Connection device for a pipe|

DE102005061516B4|2005-12-22|2016-07-28|Henco Industries Nv|Fitting with a sealing ring|

DE202007018209U1|2007-12-28|2009-05-07|Werner, Gabriele|Connection element for a line system|

NL1035370C2|2008-04-29|2009-10-30|Wavin Bv|Press coupling with improved coupling part for holding a pressing sleeve.|CN104455881A|2014-11-11|2015-03-25|贵州黔南科技塑业有限公司|Plastic clamped aluminum-plastic pipe connector|

EP3021026B1|2014-11-12|2018-07-11|Pipelife Nederland B.V.|High pressure pipe coupling construction|

WO2016205529A1|2015-06-17|2016-12-22|Eaton Corporation|Fluid fitting|

US20190186664A1|2017-12-15|2019-06-20|Gates Corporation|Hose coupling assembly|

IT201900006496A1|2019-05-02|2020-11-02|Ivar Spa|FITTING FOR THE CONNECTION OF PIPES, IN PARTICULAR OF FLEXIBLE HOSES|

法律状态:
2019-02-06| MM| Lapsed because of non-payment of the annual fee|Effective date: 20180701 |

优先权:

申请号 | 申请日 | 专利标题

DE201120107346|DE202011107346U1|2011-06-06|2011-06-06|Branch fitting|

DE202011107346|2011-06-06|

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