AT525567B1 - pipe squeeze coupling - Google Patents

Abstract

The invention relates to a pipe compression coupling (1) comprising: - a support sleeve (5); - An outer sleeve (6) with a clamping clamp seat (22) formed on an outer sleeve surface (27); - a clamp (21); - A fixing wedge (38) which, in the assembled state, is accommodated in the wedge receptacle (32) of the outer sleeve (6). The wedge receptacle (32) is designed in the form of a loop (39), the loop (39) having a first reverse bend (40) and a second reverse bend (41), the clamp (21) having at least one recess (42) through which at least a first leg (43) and a second leg (44) are formed, with a first counter-element (45) and a second counter-element (46) being formed, with the fixing wedge (38) between the first counter-element (45 ) and the second counter-element (46), the first counter-element (45) having a counter-bevel and the second counter-element (46) having a counter-bevel, so that an outer surface (51) of the first counter-element (45) and an outer surface (53 ) of the second counter-element (46) are arranged parallel to one another.

Description

Description

The invention relates to a pipe compression coupling for connection to at least one pipe, which is used for conducting a fluid.

Generic pipe compression couplings are known for example from US4147383A. These are used to create reliable and long-term stable connections in pipes made of plastics and relatively soft metals as well as multi-layer composite materials. The known pipe compression couplings can be used as an alternative to welding, for example for connecting hydraulic lines, water or gas underground lines.

DE10133183C1 discloses a pipe compression coupling in which a compression sleeve is pushed axially onto the compression sleeve—usually by means of a special hydraulic tool. The axial inner profile of the compression sleeve is designed in such a way that the compression sleeve and thus the pipe end underneath are deformed, whereby the material of the pipe end engages in the profile of the support sleeve and an extremely strong axial fixation and long-term stable seal is achieved.

The disadvantage of the known pipe compression couplings is that the compression by means of the pipe compression coupling is insufficient.

The object of the present invention was to overcome the disadvantages of the prior art and to provide an improved pipe compression coupling.

[0006] This object is achieved by a pipe squeeze coupling according to the claims.

[0007]According to the invention, a compression pipe coupling is designed. The pipe squeeze coupling includes:

- A support sleeve with an external receiving surface for receiving a pipe inner surface of a pipe;

- An outer sleeve with an outer sleeve inner lateral surface, which is designed to rest on an outer sleeve surface of the pipe, and with a clamping clamp seat formed on an outer sleeve outer lateral surface, wherein a pipe receiving space is formed between the outer receiving surface of the support sleeve and the outer sleeve inner lateral surface of the outer sleeve;

- A clamping clamp for radially inward deformation of the outer sleeve and thus for pressing the inner surface of the pipe against the support sleeve, the clamping clamp surrounding the outer sleeve in the manner of a clamp and being accommodated on the clamping clamp seat, the clamping clamp forming a wedge receptacle;

- A fixing wedge, which is accommodated in the joined state in the wedge receptacle of the outer sleeve and is used to shorten the circumference and thus to press the clamp onto the outer sleeve outer surface.

The pipe compression coupling according to the invention has the advantage that a simple and stable connection with a pipe can be produced with this. In addition, the pipe compression coupling itself can be produced simply and inexpensively, with the production having a high level of process reliability.

Furthermore, it can be useful if the clamp has a first end of the clamp and a second end of the clamp, the first end of the clamp and the second end of the clamp being coupled to one another. This has the advantage that a clamp designed in this way can have a high level of stability.

Furthermore, it can be provided that the first end of the clamp and the second end of the clamp are connected or coupled to one another by means of a positive connection or a material connection, in particular a welded or soldered connection. This has the advantage that a clamp designed in this way can have a high level of stability.

In addition, it can be provided that the clamp in one piece as sheet metal

part is formed.

It is also provided that the wedge receptacle is designed in the form of a loop, the loop having a first reverse bend and a second reverse bend, the first reverse bend and the second reverse bend serving as bearing surfaces for introducing force in the circumferential direction for the fixing wedge. This brings with it the advantage that a clamping clamp designed in this way can be produced easily and in large quantities in a process-reliable manner.

It is further provided that the clamp has at least one recess, through which at least a first leg and a second leg are formed, wherein the second end of the clamp is bent back through the recess between the first leg and the second leg to form the loop . A loop formed in this way in particular can have a good clamping effect. The diameter of the clamp can be reduced by pressing the fixing wedge axially.

According to a further development, it is possible for the outer sleeve to have a plurality of recesses distributed over the circumference, at least in the region of the clamp seat. This brings with it the advantage that a radial compression or a radial reduction in size of the outer sleeve can be achieved by this measure.

It can also be expedient if a main body is formed in one piece from a sheet metal part, with the support sleeve and a transition section being formed in the main body, with a connecting part being formed which is positively coupled to the transition section of the main body, in particular that between the Connection part and the transition section is arranged a connection part seal. In particular, a pipe compression coupling designed in this way can have a robust structure that is easy to manufacture.

In addition, it can be provided that the connection part has a fastening groove on its outer circumference, the transition section having a notch which corresponds to the fastening groove. In particular, a pipe compression coupling designed in this way can have a robust structure that is easy to manufacture.

Furthermore, it can be provided that the outer sleeve has a holding section which corresponds to the notch. In particular, a pipe compression coupling designed in this way can have a robust structure that is easy to manufacture.

According to a particular embodiment, it is possible that the holding section has a plurality of holding arms, on each of which a holding lug is formed, which protrudes into the notch. By forming individual holding arms, the outer sleeve can be easily joined to the main body. The holding arms can be designed to be flexible and yielding, so that the outer sleeve can be pushed axially onto the main body.

According to an advantageous development it can be provided that the fixing wedge is designed as a formed sheet metal part or as a solid part, in particular as a cast and/or milled part and has a central cavity.

Provision is also made for a first counter-element and a second counter-element to be formed, with the fixing wedge being arranged between the first counter-element and the second counter-element, with the first counter-element having a counter-bevel compensating for the slope of the fixing wedge on a first contact surface on the fixing wedge and wherein the second counter-element has a counter-slope compensating for the slope of the fixation wedge on a second contact surface on the fixing wedge, so that an outer surface of the first counter-element and an outer surface of the second counter-element are arranged parallel to one another. Good compression behavior can be achieved particularly with a pipe compression coupling designed in this way.

Furthermore, it can be provided that the fixing wedge rests directly on a first wall surface of the wedge receptacle and on a second wall surface of the wedge receptacle, the first wall surface and the second wall surface being arranged at a wall surface angle to one another. One

A pipe compression coupling designed in this way can have a simple structure.

In particular, it can be advantageous if a pipe seal is arranged between the outer receiving surface of the support sleeve and the pipe. This brings with it the advantage that the pipe compression coupling can have increased security with regard to its functionality.

Furthermore, it can be provided that a seal receptacle for receiving the pipe seal is formed in the form of a recess on the outer receiving surface of the support sleeve. This brings with it the advantage that an improved seat of the pipe seal on the support sleeve can be achieved by this measure. This measure can thus prevent an unintentional displacement of the pipe seal during the process of joining the pipe to be connected to the pipe compression coupling. As a result, the quality of the compression by means of the pipe compression coupling can be improved.

In addition, it can be provided that the pipe seal is designed in the form of a flat seal, which has an axial extension and a seal thickness, the seal thickness being between 1% and 60%, in particular between 4% and 30%, preferably between 7% and 15% of the axial extent. This brings with it the advantage of improved sealing of a pressed pipe compression coupling.

Furthermore, it can be provided that a depth of the seal seat is between 90% and 100%, in particular between 95% and 105%, preferably between 98% and 102% of the seal thickness. This has the advantage that the pipe can simply be pushed into the pipe squeeze coupling without the pipe seal being displaced in the process. In particular, a higher degree of certainty of the correct pressing can be achieved as a result.

A clamp within the meaning of this document can have a function similar to that of a pipe clamp.

For a better understanding of the invention, it will be explained in more detail with reference to the following figures.

It shows in each case in a greatly simplified, schematic representation:

[0029] FIG. 1 shows a perspective sectional view of a first exemplary embodiment of a pipe compression coupling in the uncompressed state;

[0030] FIG. 2 shows a perspective sectional illustration of the first exemplary embodiment of the pipe compression coupling in the compressed state;

3 shows a perspective view of the first exemplary embodiment of the pipe compression coupling in the uncompressed state;

[0032] FIG. 4 shows a perspective view of a first exemplary embodiment of a tensioning clamp in the uncompressed state;

[0033] FIG. 5 shows a further perspective view of the first exemplary embodiment of the clamping clamp in the uncompressed state;

[0034] FIG. 6 shows a sectional illustration of a second exemplary embodiment of the clamping clamp in the uncompressed state;

[0035] FIG. 7 shows a sectional illustration of a further exemplary embodiment of a clamping clamp and a fixing wedge.

First of all, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numbers or the same component designations, with the disclosures contained throughout the description being able to be transferred analogously to the same parts with the same reference numbers or the same component designations. The position information selected in the description, such as top, bottom, side, etc., is related to the figure directly described and shown and these position information are to be transferred to the new position in the event of a change of position.

Fig. 1 shows a longitudinal sectional view of a first embodiment of a pipe compression coupling 1 for producing a compression connection with a pipe 2.

In Fig. 1, the pipe pressure coupling 1 and the pipe 2 to be connected thereto are shown in the non-joined state, with the pipe 2 being shown pushed into the pipe pressure coupling 1 in an axial direction 3 .

FIG. 2 shows the exemplary embodiment of the pipe compression coupling 1 according to FIG. 1 in a state in which it is joined to the pipe 2 and pressed.

As can be seen from FIG. 2, the pipe 2 is accommodated in the press pipe coupling 1 in the pressed state and the press pipe coupling 1 is deformed in such a way that the pipe 2 is clamped or deformed in the press pipe coupling 1 .

The other components and functions of the pipe compression coupling 1 are described with reference to FIGS. 1 and 2 being viewed together.

As can be seen from FIGS. 1 and 2, it can be provided that the pipe compression coupling 1 comprises a main body 4 . The main body 4 can be formed as a one-piece component. In particular, it can be provided that the main body 4 is designed as a sheet metal part. Provision can preferably be made for the main body 4 to be in the form of a deep-drawn part.

The main body 4 may include a support sleeve 5 and a transition portion 7 . In particular, it can be provided that the main body 4 is rotationally symmetrical with respect to an axis of rotation 8 .

It can also be provided that an outer sleeve 6 is formed. The outer sleeve 6 can be in the form of an injection molded part. In particular, it can be provided that the outer sleeve 6 is formed from a plastic material.

As can also be seen from FIGS. 1 and 2, it can be provided that the outer sleeve 6 surrounds the support sleeve 5 . In particular, it can be provided that the outer sleeve 6 and the support sleeve 5 are arranged concentrically to one another.

Furthermore, it can be provided that the support sleeve 5 and the outer sleeve 6 are coupled to one another at a first longitudinal end 9 . Furthermore, it can be provided that the support sleeve 5 and the outer sleeve 6 are open at a second longitudinal end 10 and thus form a receiving area or an insertion side. In particular, it can be provided that a receiving space is formed between the support sleeve 5 and the outer sleeve 6 .

As can also be seen from FIG. 1, it can be provided that the support sleeve 5 has a receiving surface 11 which is formed on an outside of the support sleeve 5. FIG. The receiving surface 11 of the support sleeve 5 can thus face away from the axis of rotation 8 .

Furthermore, it can be provided that the support sleeve 5 has a flow-through surface 12 . The flow-through surface 12 can be formed on the inside of the support sleeve 5 . In particular, the flow-through surface 12 can face the axis of rotation 8 .

Furthermore, it can be provided that the pipe 2 has an inner pipe surface 13 and an outer pipe surface 14 .

In the assembled state of the pipe compression coupling 1 with the pipe 2 , the pipe inner jacket surface 13 of the pipe 2 can lie against the receiving surface 11 of the support sleeve 5 , as can be seen particularly well from FIG. 2 . In particular, it can be provided that the tube 2 is inserted from the second longitudinal end 10 into the receiving space between the support sleeve 5 and the outer sleeve 6 .

Furthermore, it can be provided that a pipe seal 15 is formed, which is arranged between the support sleeve 5 and the pipe 6 in the pressed state of the pipe compression coupling 1 . In particular, it can be provided that a seal receptacle 16 is arranged on the receiving surface 11 of the support sleeve 5 .

The seal receptacle 16 may be in the form of a depression which in the

Support body 5 is formed. The seal receptacle 16 can have an axial extension 17 . Furthermore, it can be provided that the pipe seal 15 has an axial extension 18 . In addition, the pipe seal 15 can have a seal thickness 19 .

The axial extent 17 of the seal receptacle 16 can be greater than the axial extent 18 of the pipe seal 15.

Furthermore, it can be provided that the seal receptacle 16 has a depth 20 . If the seal thickness 19 and the depth 20 of the seal receptacle 16 are approximately the same size, it can be achieved that the pipe seal 15 is received on the support sleeve 5 and does not or only slightly protrude beyond the receiving surface 11 of the support sleeve 5 .

Furthermore, it can be provided that a clamp 21 is designed to deform the outer sleeve 6 radially inwards and thus to press the inner surface 13 of the pipe 2 against the support sleeve 5 . The clamp 21 can surround the outer sleeve 6 in the manner of a clamp and can be accommodated in a clamp seat 22 . In particular, provision can be made for the clamping clamp seat 22 to be arranged on an outer lateral surface 27 of the outer sleeve 6 .

Furthermore, it can be provided that the outer sleeve 6 has an inner sleeve surface 23 . The inner shell surface 23 of the outer sleeve can bear against the outer shell surface 14 of the tube 2 .

Furthermore, it can be provided that a connection part 24 is formed. The connection part 24 can be coupled to the main body 4 by means of a positive connection. In particular, it can be provided that a connection part seal 25 is arranged between the connection part 24 and the main body 4 . In particular, it can be provided that a seal receptacle 26 is formed in the connection part 24, in which the connection part seal 25 is accommodated. The seal receptacle 26 can be designed in the form of a recess in the connection part 24 .

Furthermore, it can be provided that a tube receiving space 28 is formed between the outer receiving surface 11 of the support sleeve 5 and the outer sleeve inner lateral surface 23 of the outer sleeve 6 . The tube 2 can be pushed axially into the tube receiving space 28 .

Furthermore, it can be provided that the outer sleeve 6 has a plurality of recesses 29 distributed over the circumference, at least in the region of the clamping clamp seat 22 .

Furthermore, it can be provided that the connection part 24 has a fastening groove 33 on its outer circumference. The transition section 7 can have a notch 34 which corresponds to the fastening groove 33 . Furthermore, it can be provided that the outer sleeve 6 has a holding section 35 which corresponds to the notch 34 . A form-fitting connection between the outer sleeve 6, the main body 4 and the connection part 24 can thus be achieved.

[0061] As can be seen particularly well from FIG. In particular, it can be provided that the holding section 35 is rotationally symmetrical.

[0062] As indicated in FIG. The individual holding arms 36 can be separated from one another by recesses.

In FIG. 3 the clamp 21 is shown in a first perspective view and in FIG. 4 the clamp 21 is shown in a second perspective view. In Fig. 5, the clamp 21 is shown in a sectional view. The structure of the clamp 21 is described with reference to FIGS. 3 to 5 being viewed together.

The clamp 21 can be formed from a sheet metal part, which forms a ring

is bent. In particular, it can be provided that the clamp 21 has a first clamp end 30 and a second clamp end 31 which are coupled to one another. In particular, it can be provided that the first clamp end 30 and the second clamp end 31 are coupled to one another by means of a positive connection. Provision can furthermore be made for the clamping clamp 21 to have a wedge receptacle 32 for receiving a fixing wedge 38 .

In particular, it can be provided that the wedge receptacle 32 is designed in the form of a loop 39 . The loop 39 can be formed in that the sheet metal part has a first reverse bend 40 and a second reverse bend 41 . The first reverse bend 40 and the second reverse bend 41 can be in the form of a 180° setback of the sheet metal. In particular, it can be provided that the sheet metal is bent with a bending radius in the area of the first reverse bend 40 and in the area of the second reverse bend 41 . By providing the bending radius in the first reverse bend 40 and in the second reverse bend 41, the shape of the wedge receptacle 32 for receiving the fixing wedge 38 can be produced.

4, it can be provided that the clamp 21 has a recess 42, whereby a first leg 43 and a second leg 44 are formed. The second clamp end 31 can be folded back between the two legs 43, 44 in order to be able to form the loop 39. In a first exemplary embodiment, as shown in FIGS. 4 to 6, provision can be made for the fixing wedge 38 to be accommodated centrally in the loop 39. The fixing wedge 38 can have a first wedge bevel 47 and a second wedge bevel 48 . The first wedge bevel 47 and the second wedge bevel 48 can be formed at a wedge angle 49 to one another.

Furthermore, it can be provided that a first counter-element 45 is formed adjacent to the first wedge bevel 47 . In addition, it can be provided that a second counter-element 46 is formed adjacent to the second wedge bevel 48 . In other words, the fixing wedge 38 can be held in the loop 39 in a position between the first counter-element 45 and the second counter-element 46 . By axially displacing the fixing wedge 38, the two counter-elements 45, 46 can be pressed apart, as a result of which the loop 39 can be enlarged and as a result a clamp diameter 50 can be reduced.

In particular, it can be provided that a first outer surface 51 of the first counter-element 45 presses against a first wall surface 52 of the loop 39 . Furthermore, a second outer surface 53 of the second counter-element 46 can press against a second wall surface 54 of the loop 39 .

Furthermore, it can be provided that the counter-elements 45, 46 each have a positioning attachment 55, which is used for the axial positioning or for the axial retention of the counter-elements 45, 46 in the loop 39. In particular, it can be provided that the positioning projection 55 in each case bears against an end face of the loop 39 . Furthermore, it can be provided that a notch 56 is formed in the loop 39 and protrudes into a guide groove 57 of the fixing wedge 38 . The notch 56 or the guide groove 57 can be used to position the fixing wedge 38 .

7 shows a further embodiment of the fixing wedge 38. As can be seen from FIG. Provision can also be made for the second wedge bevel 48 to bear directly against the second wall surface 54 . It can be provided here that the two wall surfaces 52, 54 are arranged at a wall surface angle 58 to one another. The wall surface angle 58 can be the same size as the wedge angle 49. With an exemplary embodiment designed in this way, the wall surfaces 52, 54 can be pressed apart by means of the fixing wedge 38 without the use of counter-elements.

Furthermore, it can be provided that the fixing wedge 38 has a cavity 59 . Such a cavity 59 can be formed in particular when the fixing wedge 38 also

if bent from a sheet metal part.

Finally, for the sake of order, it should be pointed out that, in order to better understand the structure, some elements are shown not to scale and/or enlarged and/or reduced.

REFERENCE LIST

1 pipe compression coupling 27 outer sleeve outer jacket surface 3 axial direction 28 pipe receiving space 4 main body 29 recess 5 support sleeve 30 first clamp end 6 outer sleeve 31 second clamp end 7 transition section 32 wedge receptacle 8 rotation axis 33 fastening groove 9 first longitudinal end 34 notch 10 second longitudinal end 35 holding section 11 receiving surface of the support 36 holding arm sleeve 37 retaining lug 12 flow-through surface of the support 38 fixing wedge sleeve 39 loop 13 pipe inner surface 40 first reverse bend 14 pipe outer surface 41 second return bend 15 pipe seal 42 recess 16 seal receptacle 43 first leg 17 axial extent of seal 44 second leg receptacle 45 first counter-element 18 axial extent 46 second counter-element 19 seal thickness 47 first wedge bevel 20 depth of the seal receptacle 48 second wedge bevel 21 clamp 49 wedge angle 22 clamp seat 50 clamp diameter 23 outer sleeve inner jacket surface 51 first outer surface first compartment element 24 connection part 52 first wall surface 25 connection part seal 53 second outer surface second 26 seal receptacle counter-element

54 second wall surface 55 positioning projection 56 notch

57 guide groove

58 wall angle 59 cavity

Claims (11)

patent claims 1. Compression pipe coupling (1) comprising: - a support sleeve (5) with an external receiving surface (11) for receiving a pipe inner lateral surface (13) of a pipe (2); - An outer sleeve (6) with an outer sleeve inner lateral surface (23) which is designed to rest on an outer lateral surface (14) of the pipe (2), and with a clamping clamp seat (22) formed on an outer sleeve outer lateral surface (27), with between the outer receiving surface (11) the support sleeve (5) and the outer sleeve inner lateral surface (23) of the outer sleeve (6) are formed with a tube receiving space (28); - a clamp (21) for deforming the outer sleeve (6) radially inwards and thus for pressing the inner surface (13) of the pipe (2) onto the support sleeve (5), the clamp (21) surrounding the outer sleeve (6) like a clamp and is accommodated on the clamping clamp seat (22), characterized in that the clamping clamp (21) forms a wedge receptacle (32) and a fixing wedge (38) is formed which, in the assembled state, is accommodated in the wedge receptacle (32) of the outer sleeve (6). and is used for circumferential shortening and thus for pressing the clamp (21) onto the outer sleeve surface (27), the wedge receptacle (32) being designed in the form of a loop (39), the loop (39) having a first reverse bend (40) and has a second reverse bend (41), the first reverse bend (40) and the second reverse bend (41) serving as contact surfaces for the introduction of force in the circumferential direction for the fixing wedge (38), the clamping clamp (21) having at least one recess (42) through which at least a first leg (43) and a second leg (44) are formed, wherein to form the loop (39) the second clamp end (31) passes through the recess (42) between the first leg (43) and the second leg (44) is bent back, with a first counter-element (45) and a second counter-element (46) being formed, with the fixing wedge (38) being arranged between the first counter-element (45) and the second counter-element (46), with the first counter-element (45) on a first contact surface on the fixing wedge (38) has a counter-slant compensating for the slope of the fixing wedge (38), and the second counter-element (46) on a second contact surface on the fixing wedge (38) has a counter-slant that compensates for the slope of the fixing wedge (38) has a compensating counter slope, so that an outer surface (51) of the first counter-element (45) and an outer surface (53) of the second counter-element (46) are arranged parallel to one another. 2. Pipe compression coupling (1) according to claim 1, characterized in that the clamp (21) has a first clamp end (30) and a second clamp end (31), the first clamp end (30) and the second clamp end (31) being coupled to one another are. 3. Pipe compression coupling (1) according to claim 2, characterized in that the first clamp end (30) and the second clamp end (31) are coupled to one another by means of a positive or material connection. 4. Pipe compression coupling (1) according to any one of claims 1 to 3, characterized in that the clamp (21) is formed in one piece as a sheet metal part. 5. Compression pipe coupling (1) according to one of the preceding claims, characterized in that the outer sleeve (6) has a plurality of recesses (29) distributed over the circumference at least in the region of the clamp seat (22). 6. Compression pipe coupling (1) according to one of the preceding claims, characterized in that a main body (4) is formed in one piece from a sheet metal part, the support sleeve (5) and a transition section (7) being formed in the main body (4), with a Connection part (24) is formed, which is positively coupled to the transition section (7) of the main body (4), in particular that a connection part seal (25) is arranged between the connection part (24) and the transition section (7). 7. Pipe compression coupling (1) according to claim 6, characterized in that the connecting part (24) has a fastening groove (33) on its outer circumference, the transition section (7) having a notch (34) which corresponds to the fastening groove (33). . 8. Pipe compression coupling (1) according to claim 7, characterized in that the outer sleeve (6) has a holding section (35) which corresponds to the notch (34). 9. Pipe compression coupling (1) according to claim 8, characterized in that the holding section (35) has a plurality of holding arms (36), on each of which a holding lug (37) is formed which protrudes into the notch (34). 10. Pipe compression coupling (1) according to any one of the preceding claims, characterized in that the fixing wedge (38) is designed as a formed sheet metal part or solid part and has a central cavity (59). 11. Compression pipe coupling (1) according to one of claims 1 to 10, characterized in that the fixing wedge (38) rests directly on a first wall surface (52) of the wedge receptacle (32) and on a second wall surface (54) of the wedge receptacle (32), said first panel (52) and said second panel (54) being disposed at a panel angle (58) to one another. 5 sheets of drawings