WO2011036070A1

WO2011036070A1 - Device for connecting two pipe ends using a positively acting retaining element

Info

Publication number: WO2011036070A1
Application number: PCT/EP2010/063449
Authority: WO
Inventors: Karl Weinhold
Original assignee: Karl Weinhold
Priority date: 2009-09-28
Filing date: 2010-09-14
Publication date: 2011-03-31
Also published as: DE102009043024A1; DE102009043024B4; PL217569B1; WO2011036070A9; RU2484354C1; PL399494A1

Abstract

The invention relates to a device for connecting two pipe ends (1, 1', 1' ', 2, 2', 2'') using a coupling part (3, 3', 3'') and a plug part (4, 4', 4''), wherein the coupling part (3, 3', 3'' ) comprises at least one concentric recess (5) in the interior and the plug part (4, 4', 4'') comprises at least one circumferential recess (6) on the exterior surface in the overlapping area, and wherein the coupling part (3, 3', 3'') comprises at least one opening (7) in the area of the recess (5), through which at least one flexible retaining element can be inserted into each annular channel formed by the recesses (5, 6). In order to simplify releasing the connection by removing the chain, and particularly sealing again after a long period of time and under extreme conditions, and to allow the same without the known simple construction design, the invention proposes that the retaining element is implemented comprising a lock and two ends, said ends being able to be inserted in one direction each into the circumferential annular channel through the opening (7), thus locking the two pipe ends (1, 1', 1' ', 2, 2', 2'' ) axially to each other.

Description

Device for connecting two pipe ends with a form-locking securing element

The invention relates to a device for connecting two pipe ends with a sleeve part and a male part, wherein in the overlapping region, the sleeve part at least one concentric recess provided in the interior and the male part at least one circumferential recess on the outer surface and wherein the sleeve part at least one opening in the region of the recess has, by which at least one flexible securing element can be introduced into each of the recesses formed annular channel.

Devices for connecting two pipe ends, also called pipe couplings for short, have been in use for a long time

various designs. In the simplest case, the

Pipe ends provided with flanges and are by

corresponding aligned holes screwed together. The seal is usually done by in

corresponding recesses inserted seals. For some applications, the pipe ends also directly matched threads, so that the pipes, such as drill pipes, can be bolted directly together.

Also, it is already known to use so-called quick couplings, which usually without tools in a short time

closed and can be opened again, like

for example, clamp couplings. Such couplings are particularly suitable for applications in dene; need to be opened more frequently. Among the quick couplings include the aforementioned devices in which a circumferential annular channel in the overlapping region of

Cuff part and plug-in part exists, in which a chain is inserted as a securing element through an opening, which subsequently fills the entire length of the annular channel to provide the pipe ends the required axial support

(DE 33 24 271 AI). These known chain couplings have the disadvantage that they - especially after prolonged life and under extreme conditions, such as in underground mining - are subject to heavy pollution and corrosion, so that the release of the connection by pulling out the chain and in particular the re-closing often only great effort is possible. For threading a chain over the entire circumference of the pipe coupling is relatively complicated and usually only in a new, d. H. absolutely clean, condition of the coupling possible. However, this runs counter to the basic principle of a quick coupling. Moreover, it is disadvantageous that such a pipe coupling, which, as usual in underground mining, is contained in a horizontal position over a relatively long period of time and at high pressures, in particular can be damaged or even destroyed by the intraday bending loads in a line. because the individual parts of the chain by such bends

can not withstand occurring point load.

The invention is therefore based on the object, the aforementioned device and previously described in more detail for

Connect two pipe ends to design and further form that the aforementioned disadvantages are avoided and In particular, a fast connection is made possible without leaving the known simple structural design.

This object is achieved in a device according to the preamble of claim 1, characterized in that the

Secured element is designed so that it has a lock and two ends which are insertable through the opening in one direction of the circumferential annular channel and thus lock the two pipe ends axially together.

In this way, it is possible not to have to push the fuse element completely around the entire length of the inner ring channel, but rather to "divide" and insert the halves opposite each other simultaneously.Thus, the sliding path of the fuse element is halved.This has the advantage in that, during disassembly, the tensile force on the securing element is more easily implemented by halving, that is, the entire securing element no longer has to be pulled out via a sleeve, which would no longer be possible in the event of any deformation that may have occurred in the meantime.

According to another teaching of the invention, the

Recesses formed arched and form with closed device an annular channel with a substantially circular cross-section. This allows a particularly simple

Production of the device.

According to another teaching of the invention, the flexible securing element is designed as a double chain. Under

'Double chain' is understood to mean a chain with a lock and two free ends emanating from the lock. Here, the two ends of the double chain are preferably the same length educated. The geometry of the chain links is matched to the cross section of the annular channel.

It goes without saying that at higher pressure forces in place of a chain per connection and two or more chains can be arranged one behind the other to higher

To transmit axial tensile forces. In addition, the device can of course be designed as a double nipple, so that the two pipe ends can be made the same,

for example, as a sleeve part, and that the double nipple has correspondingly shaped plug-in parts.

The double chain can according to the invention in various

Finishes can be made so it can be spherical

Have chain links, disc-like chain links or designed as a cylindrical pin chain links.

It is also conceivable that the securing element is not a chain, but a lock with strong helical spring-like ends is used.

According to another teaching of the invention, the lock completely fits into the opening of the socket part when the fuse element is inserted. This is particularly useful, since the opening can then be provided with a corresponding cover to counteract contamination inside the annular channel.

A further embodiment of the invention provides that the lock is designed as a mounting nipple. The geometric shape of the mounting nipple can then be based on the geometry in the region of the opening of the annular channel to the Keep fuse element firmly in position.

Alternatively, however, it is also possible that the lock is designed as a cable loop, the arrangement of the

Cable loop conveniently in the middle of the

Secured element is provided.

A particularly expedient teaching of the invention provides that at least one lubricating nipple is provided in the region of each annular channel, which is preferably arranged diametrically opposite the respective opening. In this way, it is possible to fill the annular channel completely with grease after insertion of the securing element to prevent ingress of dirt or moisture, so that removal of the fuse element is easily possible even after prolonged life.

According to a further embodiment of the invention, the opening in the sleeve part of a sleeve part largely enclosing spring clip is covered. It is the

Spring clip expediently arranged in a mounted on the outside of the sleeve part circumferential groove to reliably exclude an axial slippage and thus a release of the opening. In a further embodiment of the invention, the male part made of steel tube and be integrally formed on the one pipe end. Alternatively, it is also possible to manufacture the male part made of plastic. The material selection of

Device according to the invention will depend on the particular application parameters in each case. The invention will be described below with reference to a merely

preferred embodiments illustrative drawing explained in more detail. In the drawing, Fig. 1 shows a first embodiment of the invention in

Longitudinal section (FIG. 1A) and in cross-section (FIG. 1B),

Fig. 2 designed as a chain fuse element according to

Fig. 1,

Fig. 3 shows a second embodiment of the invention in

Longitudinal section (FIG. 3A) and in cross section (FIG. 3B),

Fig. 4 designed as a chain fuse element according to

3,

Fig. 5 shows a third embodiment of the invention in

Longitudinal section (Fig. 5A) and in cross section (Fig.

5B),

Fig. 6 designed as a chain fuse element according to

Fig. 5,

Fig. 7 shows a further embodiment of the invention in

FIG. 7A) and in cross-section (FIG. 7B), FIG. 8 shows the securing element designed as a chain according to FIG

Fig. 7, 9 shows a further embodiment of the invention in longitudinal section (FIG. 9A) and in cross section (FIG.

9B), Fig. 10 designed as a chain fuse element according to

Fig. 9,

Fig. 11 shows a further embodiment of the invention in

Longitudinal section (Fig. IIA) and in cross section (Fig. IIB) and

Fig. 12 designed as a chain fuse element according to

Fig. 11. In the drawings, various embodiments of the device according to the invention are shown, wherein in the different embodiments, the same parts are each provided with the same reference numerals. FIG. 1A shows a device according to the invention in FIG

closed state in longitudinal section and Fig. 1B the

Device according to the invention in cross section. Two pipe ends 1 and 2 of the same diameter are formed so that at the end of a pipe end 1, a sleeve part 3 and the other

Pipe end 2 a sleeve part 4 are provided. in the

Overlap region of both tubes, the sleeve part 3 in the interior of a concentric recess 5 and the male part 4 is provided on its outer surface with a peripheral recess 6, in particular the cross section of

Device according to the invention shown in FIG. 1B can be removed. The two recesses 5 and 6 form an annular channel. In the illustrated preferred embodiment, the sleeve part 3 has on its upper side an opening 7, through which a flexible securing element can be introduced into each of the recesses 5 and 6 formed annular channel. The seal of the two pipe ends takes on a arranged in a groove 8 seal 9, which may be performed for example as an O-ring.

Preferably, a chain 10 is used as a securing element, which centrally contains a designed as a mounting nipple 11 lock on the two equal length chain ends with a

Plural of spherical chain links 12 are attached. It is readily apparent that in the device according to the invention the "double chain" used can be used to secure the two pipe ends 1 and 2, that the two ends of the chain 10 can be inserted simultaneously into the respective annular channel halves from the recesses 5 and 6, until finally the mounting nipple 11 comes to lie in the opening 7 of the annular channel, as is particularly clear from Fig. 1B.

Diametrically opposite the opening 7 in the illustrated preferred embodiment, a lubricating nipple 13 is provided, through which grease can be pressed into the annular channel in order to protect the chain located there from dirt and corrosion. In addition, the opening 7 is closed by means of a spring clip 14, which surrounds the sleeve part 3, as shown in Fig. 1B, so that also in this way there is a protection of the annular channel. The axial slipping of the spring clip 14 is prevented by a correspondingly executed circumferential groove 15 in the sleeve part 3. 3 and 4 or 5 and 6 show the same pipe coupling as in Figures 1 and 2, wherein only different chains 10 'and 10''find use. In the chain 10 ', the chain links 12' are made like a disk. In the case of the chain 10 '' are designed as cylindrical bolts

Chain links 12 '', otherwise the figures 3 to 6 correspond exactly to Figures 1 and 2.

FIGS. 7A, 7B and 8 show another one

Auführungsbeispiel the device according to the invention, wherein a chain 10 '' 'is used, in which the lock is designed as a cable loop 11'. Here will be again

spherical chain links 12 used. Not shown is that even such a necklace with differently shaped

Chain links can be equipped.

FIGS. 9A, 9B and 10 show another one

Embodiment of the device according to the invention, wherein the first tube end 1 'has a sleeve part 3' with the same outer diameter as the tube and the second tube end 2 'has a male part 4' again with the same outer diameter. In this way, a particularly compact

Pipe coupling achieved, which is particularly suitable for low-pressure pipes with heavy mechanical stress in cramped

Conditions, such as in underground mining, can be used. Here are the lubricating nipple 13 and the spring clip 14 only slightly over, so that the pipe coupling largely insensitive to external mechanical

Actions is.

Furthermore, FIGS. 11A, 11B and 12 show an embodiment of the device according to the invention, in which the pipe ends 1 '' and 2 '' by a corresponding

trained sleeve part 3 '' or male part 4 '' are designed so that the inner tube cross-section in the region of

Pipe coupling remains the same. Such a design is particularly suitable for pipes that need to be cleaned regularly inside, since here the pipe coupling is not a constriction, so that a pig of the line

easily possible. Finally, it should be noted that, even if the embodiments shown two pipe ends with sleeve part and

Plug show, from the invention, such

Pipe couplings are included, in which the pipe ends

are formed identically and where a double nipple with twice the number of chains for the necessary positive

Connection ensures. Furthermore, several chains can be present in parallel annular channels in order to transmit correspondingly higher tensile forces, even if this is not the case in the

Drawing is shown.

Claims

claims

Device for connecting two pipe ends (1, 1 ', 1' ', 2, 2', 2 '') with a sleeve part (3, 3 ', 3' ') and a plug-in part (4, 4', 4 '') , wherein in the overlapping region, the sleeve part (3, 3 ', 3' ') at least one concentric recess (5) provided in the interior and the

Plug part (4, 4 ', 4' ') at least one on the

Outer surface having circumferential recess (6) and wherein the sleeve part (3, 3 ', 3' ') at least one opening (7) in the region of the recess (5) through which at least one flexible securing element in each of the recesses (5, 6) can be introduced,

characterized in that the securing element is formed so that it has a lock and two ends, which are insertable through the opening (7) in each case one direction of the circumferential annular channel and so the two pipe ends (1, 1 ', 1' ', 2 , 2 ', 2' ') axially lock together.

Apparatus according to claim 1, d a d u r c h

e n c ia n e, s e s

the recesses (5, 6) have a curved cross-section and with the device closed at least one annular channel with a substantially circular

Form cross-section. Apparatus according to claim 1 or 2,

That is, the flexible securing element is designed as a double chain (10, 10 ', 10 ", 10'").

Device according to claim 3,

The two ends of the double chain (10, 10 ', 10 ", 10"') are of the same length as the two ends of the double chain (10, 10 ', 10 ", 10"') are d a d u r c h g e k e n e.

Apparatus according to claim 3 or 4,

d a d u r c h e k e n e, the d a s s the double chain (10, 10 ', 10 ", 10"') is spherical

Chain links (12, 12 ", 12") has.

Apparatus according to claim 3 or 4,

d a d u r c h g e k e n e z e n e, e s the double chain (10 ') has disc-like chain links (12').

Apparatus according to claim 3 or 4,

The double chain (10 ") is designed as a cylindrical bolt

Chain links (12 ") has.

Apparatus according to claim 3 or 4,

characterized in that the securing element has helical spring-like ends.

9. Device according to one of claims 1 to 8,

In the case of an inserted securing element, the lock completely fits into the opening (7) of the sleeve part (3, 3 ', 3' ').

10. Apparatus according to claim 9,

That is, the lock is designed as a mounting nipple (11, 11 '').

11. The device according to claim 9,

That is, the lock is formed as a loop of wire (11 ').

12. Device according to one of claims 1 to 11,

At least one lubrication nipple (13) is provided in the region of each annular channel.

13. Device according to claim 12,

d a d u r c h e e n c e n e, each of the grease nipples (13) is diametrically opposite to the one

respective opening (7) is arranged.

14. Device according to one of claims 1 to 13,

characterized in that the opening (7) of the sleeve part (3, 3 ', 3'') largely enclosing spring clip (14) is covered.

15. Device according to claim 14,

The spring clip (14) is arranged in a circumferential groove (15) introduced on the outside of the sleeve part (3, 3 ', 3' ').

16. Device according to one of claims 1 to 15,

The plug-in part (4, 4 ', 4' ') is made of tubular steel and to which a pipe end (1, 1', 1 '') is integrally formed.

17. Device according to one of claims 1 to 15,

The plug-in part is made of plastic, so that the plug-in part is made of plastic.