DE102008047003A1 - Non-detachable pipe connection - Google Patents

Abstract

The invention relates to a non - detachable pipe connection between an outer tubular connection sleeve (8) and an inner pipe socket (5) with a compression collar (6), which is inserted into the connection sleeve (8), wherein the connection sleeve (8) behind the compression collar (6 ) of the pipe socket (5) is deformed radially inwardly. As a result, the pipe socket (5) can no longer be pulled out of the connection sleeve (8). The seal is only radially via a sealing ring (16) between the pipe socket (5) and connection sleeve (8).

Description

The The invention relates to a pipeline with two in a solderless Joint with each other firmly connected pipe sections or with a pipe section that connects to a port to a hose or other pipeline mediating tubular nipple or pipe socket is firmly connected, according to the features of the preamble of the claim.

It are already solderless pipe connections for pipe ends known in which placed on the pipes to be joined metal rings be under the pressure of a nut both against the pipe as well be pressed against the connection or connection sleeve. at However, these devices have the disadvantage that at every Connection the mother must be tightened, what on the one hand to Deformations of the pipe can lead, on the other hand can this connection will dissolve unnoticed. The same disadvantage also applies to pipe joints, which instead of the metal rings zusammenpressbare annular Have soft material packages.

The DE 197 40 144 C2 describes a compound of a pipe with a metal sleeve, wherein the bore has on its inner surface alternately annular recesses and annular projecting webs and the inserted into the bore of the metal sleeve tube end is deformed by the compression of the sleeve by the webs radially inwardly. The resulting positive connection keeps the tube in the metal sleeve. The seal is made by a previously inserted into a groove of the sleeve O-ring. A disadvantage of this solution is on the one hand, that the production of the sleeve is complicated due to the internal geometry with their undercuts, on the other hand, that reduces the deformation of the sleeve of the pipe cross-section.

From the G 92 11 647 U1 is a non-detachable pipe connection including an O-shaped Abdichtringes known, which is pressed by an oblique compression collar of an inserted into a stepped bore of a connection sleeve of a pipe section pipe socket against an inclined annular surface of the stepped bore with the same angular position.

A solid, permanent pipe connection is achieved by that in firmly connected state of the pipeline the supernatant the connecting sleeve around the compression collar of the pipe socket so radially The inside of the pipe is not bent out of the pipe Stepped bore of the connection sleeve is pulled out, as the inner Diameter of the supernatant is now smaller than the outer one Diameter of the compression collar of the pipe socket. The one in the annulus between compression collar of the pipe socket and the conical step of the Stepped bore of the connection sleeve clamped or axially pressed Sealing ring seals the pipe socket against the connection sleeve.

Of the Sealing ring is against the inclined ring surface the conical step of the stepped bore of the connection sleeve pressed. The oblique to the pipe axis lying, the sealing ring receiving annulus points at a possible through media contact Swelling of the Abdichtringes no escape space on more. It exists thus the risk of destruction of the sealing ring. By The angle of the two annular space corners is less than 90 ° the sealing ring pressed into the resulting triangles and there more deformed than in an annulus with only right Angles. The risk of a split extrusion is extremely high.

Of the The sealing ring will be replaced by the one in the hydraulic line prevailing operating pressure in the gap of the components to be sealed forced. The shear resistance of the sealing ring is sufficient not out, so the sealing material migrates into the gap between Inside and outside part. Both components are with a manufacturing tolerance Afflicted so that at their junction depending on The tolerances of the components creates a gap. The sealing ring will be extremely deformed there very soon and further destroyed. The case of the sealing body resulting plastic deformation becomes larger and larger with continuous pressurization. In the final stage it comes to the failure of the seal, because by the changed Voltage distributions in the sealing body a sufficient Sealing function is no longer guaranteed.

Of the Invention is based on the object, a solid and insoluble To provide pipe connection of the type described above, in the no screw connections or thermal joining processes necessary are and an undefined compression of the sealing ring with the Dangers of destruction of the sealing ring due to occurring Column extrusion is minimized.

The The object is achieved according to the invention that the length of the area of the pipe socket between its front end and the compression collar larger is as the length of the second length section the stepped bore, leaving an annulus between the compression collar the pipe socket and the paragraph between the second and third longitudinal section is formed, in which the sealing ring defined under axial clearance is arranged axially unbentered.

The sealing takes place only by a radial deformation of the Abdichtringes between the outer circumference of the nipple or pipe socket and the inner circumference of the undeformed third longitudinal portion of the connection sleeve. The compression collar of the inserted pipe socket is arranged at a distance from the bottom of a stepped bore of the connection sleeve in the inserted state. In this clearance, the O-shaped sealing ring is arranged so that no axial pressing forces act on this. The sealing ring is merely tensioned radially and thus ensures the sealing effect.

Of the the sealing ring receiving annular space is through the compression collar and formed a shoulder of the stepped bore in the connection sleeve.

These Arrangement has the advantage that the nipple or pipe socket firmly and permanently connected to the connection sleeve, wherein the sealing ring experiences no gap extrusion. The seat the sealing ring has a symmetrical shape of an annular space on.

Both Components let together after their connection a defined arise symmetrical annular space, which receives the sealing ring, which is pressed there only radially and the separation point these two Radial sealing components.

The Danger of leaking assembly errors is minimized. The pipe socket undergoes during pressing no diameter reduction, a screw connection can be omitted. An elaborate groove in the bore of the connection sleeve for receiving a sealing ring is dispensable.

On This way is a compact, fast and safe, almost wear-free Achievable pipe connection without thermal connection method how soldering gets along and for pressures up above 400 bar can be used.

Based The drawing will be an embodiment below the invention explained in more detail. It shows

1 a junction of a pipeline in which one end of a pipe socket is inserted into the end of a pipe section, wherein the two parts are not yet firmly connected to each other;

2 the pipe connection after 1 with firmly connected parts.

In 1 becomes a junction of a pipeline 3 shown in which the ends of a pipe section 4 and a pipe socket 5 are inserted into each other. Instead of a pipe socket 5 can also be connected to a tubular nipple, which is designed at its other end for receiving a hose.

The pipe socket 5 has a compressed, outwardly projecting compression collar 6 on, from the front end 7 of the pipe socket 5 is spaced.

The pipe section 4 has a connection sleeve 8th on, by a central stepped bore 9 coaxially penetrated. The stepped bore 9 has a first length section with an inner diameter 11 on, which is smaller than the outer diameter 12 of the pipe socket 5 , At this first length section then points the stepped bore 9 a second length portion having a second inner diameter 13 on that with the outside diameter 12 of the pipe socket 5 corresponds and in the pipe socket 5 pushed in. Between the first and second longitudinal section is by the diameter jump an annular shoulder 17 available. A third length section of the stepped bore 9 has an inner diameter 14 on, which is such that the compression collar 6 of the pipe socket 5 in this inner diameter 14 in the circumference approximately fits to the bore inner wall of this longitudinal section fitting.

Between the second and third sections of the stepped bore 9 is by the diameter jump another annular paragraph 15 present, which also forms an annular surface.

On the pipe socket 5 is an O-shaped sealing ring 16 in front of the compression collar 6 postponed. The pipe socket 5 is so in the stepped bore 9 the connection sleeve 8th pushed in that the front end 7 of the pipe socket 5 against the paragraph 17 between the first and second longitudinal sections of the stepped bore 9 strikes. Because the length of the area 19 of the pipe socket 5 between his end 7 and the compression collar 6 greater than the length of the second length of the bore 9 , lies the Stauchbund 6 of the pipe socket 5 in the inserted state shown spaced apart from the shoulder 15 the connection sleeve 8th so that an annulus 10 between the compression collar 6 of the pipe socket 5 and the paragraph 15 arises, in which the sealing ring 18 axially unrestrained under axial clearance is arranged, that is, the length of the annular space 10 is slightly larger than the width of the sealing ring 16 ,

The connection sleeve 8th has a projection at the free end 18 on, with fully inserted pipe socket 5 over the compression collar 6 of the pipe socket 5 hinauskragt.

2 shows the pipe connection in a firmly connected state. The supernatant 18 the connection sleeve 8th is around the compression collar 6 of the pipe socket 5 turned radially inward so that the pipe socket 5 not from the stepped bore 9 the connection sleeve 8th is removable because of the inner diameter 21 of the supernatant 18 now smaller than the outer diameter 22 of the compression collar 6 of the pipe socket 5 , The one in the annulus 10 between compression collar 6 of the pipe socket 5 and the paragraph 17 the stepped bore 9 the connection sleeve 8th arranged sealing ring 16 is only clamped radially and seals the pipe socket 5 only radially against the connection sleeve 8th safe off.

1

2

3

pipeline

4

Pipeline section

5

pipe socket

6

Stauch Bund

7

front-page The End

8th

coupling bush

9

stepped bore

10

annulus

11

Inner diameter first length section

12

outer diameter pipe socket

13

Inner diameter second length section

14

Inner diameter third length section

15

paragraph between the second and third sections

16

sealing ring

17

paragraph between the first and second lengths

18

Got over

19

range length

20

21

Inner diameter deformed supernatant 18

22

Outer diameter of the compression collar 6

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• DE 19740144 C2 [0003]
• - DE 9211647 U1 [0004]

Claims (1)

Pipe having two fixedly connected in a solderless joint pipe sections or with a pipe section which is fixedly connected to a connection to a hose or other pipeline mediating tubular nipple or pipe socket, wherein in an outer tubular connecting sleeve (in 8th ) of the one pipe section ( 4 ) of the nipple or pipe socket ( 5 protruding, wherein the nipple or pipe socket ( 5 ) a circumferential, from the front end ( 7 ) of the nipple or pipe socket ( 5 ) spaced, outwardly projecting Stauchbund ( 6 ), and wherein the connection sleeve ( 8th ) a continuous, stepped stepped bore ( 9 ), are formed by the three longitudinal sections, each having a different inner diameter, wherein - the first length portion has an inner diameter ( 11 ), which is smaller than the outer diameter ( 12 ) of the pipe socket ( 5 ), - the second length section has an inner diameter ( 13 ), which with the outer diameter ( 12 ) of the pipe socket ( 5 ) corresponds, so that the end of the pipe socket ( 5 ) in the second longitudinal section of the stepped bore ( 9 ) of the connection sleeve ( 8th ) is fittingly inserted and - the third longitudinal section has an inner diameter ( 14 ) having the diameter ( 22 ) of the compression collar lying within this third longitudinal section ( 6 ) of the pipe socket ( 5 ) corresponds, - that radially between the pipe socket ( 5 ) and the connecting sleeve ( 8th ) an O-ring-shaped sealing ring ( 16 ) is arranged, - that the free end of the third longitudinal portion of the connection sleeve ( 8th ) around the compression collar ( 6 ) of the pipe socket ( 1 ) around to an inner diameter ( 21 ) smaller than the outer diameter ( 22 ) of the compression collar ( 6 ) of the pipe socket ( 5 ) is formed radially inwardly, characterized in that that the length of the region ( 19 ) of the pipe socket ( 5 ) between its front end ( 7 ) and the compression collar ( 6 ) is greater than the length of the second Längenabschnit tes the stepped bore ( 9 ), so that an annulus ( 10 ) between the compression collar ( 6 ) of the pipe socket ( 5 ) and paragraph ( 15 ) is formed between the second and third longitudinal section, in which the sealing ring ( 16 ) Axially open space defined axially unclamped.