Pipe connecting device

Abstract

Pipe connection device (1) with a sleeve-shaped receiving part (2) for receiving a pipe end, a pressure component (4) which is connected to the receiving part (2) so as to be adjustable in the axial direction, and a sealing and holding device (5) arranged between the receiving part (2) and the pressure component (4) for the sealed retention of the pipe end within the receiving part (2), wherein the sealing and holding device (5) comprises a sealing ring (6) and a clamping ring (7) made up of a plurality of radially movable clamping segments (8), wherein the sealing ring (6) has spaced-apart spacers (24) on its inner side, characterized in that the clamping segments (8) have on their radial outer side a recess (25) which runs in the axial direction and into which a spacer (24) of the sealing ring (6) engages.

Description

[0001] The invention relates to a pipe connecting device according to the preamble of claim 1.

[0002] Such a pipe connection device is known from EP 1 292 792 B1. It comprises a connecting sleeve for receiving a pipe end, a pressure component, and a sealing and holding device arranged therebetween. The pressure component serves to press the sealing and holding device against the pipe in order to ensure both a seal and a holding of the pipe. For this purpose, the sealing and holding device comprises a sealing component in the form of a sealing ring and a clamping ring arranged in the sealing ring, which has several clamping segments with wedge-shaped clamping elements. In this known design, the clamping ring consisting of individual clamping segments must first be put together to assemble the sealing and holding device. The clamping segments have a tongue and groove connection for this purpose.The clamping segments assembled in this way form the clamping ring, onto which the wedge-shaped clamping elements must then be attached. Assembling the sealing and holding device involves considerable assembly effort. Furthermore, the manufacture of the clamping segments is complex and costly due to their geometric design.

[0003] US 2005 / 0194784 A1 discloses a pipe connection device comprising a sleeve-shaped receiving part, a pressure component connected to the receiving part so as to be adjustable in the axial direction, and a sealing ring arranged between the receiving part and the pressure component. The sealing ring contains several ring-segment-shaped clamping pieces embedded in the sealing body of the sealing ring.

[0004] US 2006 / 0113793 A1 discloses a pipe connection device comprising a sleeve-shaped receiving part for receiving a pipe end, a pressure component connected to the receiving part so as to be adjustable in the axial direction, and a sealing and holding device arranged between the receiving part and the pressure component for sealingly retaining the pipe end within the receiving part. The sealing and holding device consists of a sealing ring and a clamping ring comprising a plurality of radially movable clamping segments. Spacers are arranged between the clamping segments of the clamping ring.

[0005] The object of the invention is to provide a pipe connecting device of the type mentioned above which is easier to manufacture and easier to assemble.

[0006] This object is achieved by a device having the features of claim 1. Appropriate further developments and advantageous embodiments of the invention are the subject of the subclaims.

[0007] The pipe connection device according to the invention contains a sleeve-shaped receiving part for receiving a pipe end, a pressure component that is adjustably connected to the receiving part in the axial direction, and a sealing and holding device arranged between the receiving part and the pressure component for sealingly holding the pipe end within the receiving part. The sealing and holding device comprises a sealing ring and a clamping ring made up of several radially movable clamping segments, wherein the sealing ring has spaced-apart spacers on its inner side for engaging in recesses in the clamping segments. Due to the design of the spacers, the clamping segments are held at a distance from one another via the sealing ring and no longer need to be positively connected to one another via separate holding elements. This significantly simplifies the production of the clamping segments. A complex plugging of the clamping segments is eliminated.

[0008] In a particularly advantageous embodiment, the spacers can be designed as webs that are formed on the inside of an outer cylindrical part of the sealing ring, projecting inwardly and designed to engage the recesses of the clamping segments. However, the spacers could also be arranged in a corresponding manner on another part of the sealing ring.

[0009] In a further advantageous embodiment, the clamping segments can contain at least one guide groove for engagement with an associated guide web on the sealing ring.

[0010] This allows for positive guidance of the clamping segments on the sealing ring. A particularly advantageous guidance of the clamping segments on the sealing element is achieved by providing the clamping segments with an outer guide groove on their radial outer side for engagement with a circumferential outer guide rib of the sealing ring and / or a second guide groove on their radial inner side for engagement with a circumferential inner guide rib of the sealing ring.

[0011] A further advantageous embodiment is characterized by the fact that on the side of the clamping segments facing the sealing ring, on their radial inner side, a wedge-shaped projection protruding in the circumferential direction of the clamping ring is arranged, and on the side opposite the projection, a recess for the positive engagement of the wedge-shaped projection of an adjacent clamping segment is arranged. The projections engaging in the corresponding recesses prevent parts of the sealing ring surface from being pressed into the resulting gaps between the individual clamping segments during assembly of the pipe connection device, and in particular when tightening the clamping ring.

[0012] The clamping segments are preferably wedge-shaped and have a first shoulder projecting in the circumferential direction of the clamping ring for engagement with a conical central part of the sealing ring and a second shoulder for engagement with a conical support surface of the pressure component.

[0013] A stepped recess for accommodating a retaining element can also be provided on the radial inner side of the clamping segments. The retaining elements can be connected to the clamping segments via a snap-in connection. The clamping segments and the retaining elements can be made of plastic in a simple and cost-effective design.

[0014] Further features and advantages of the invention will become apparent from the following description of a preferred embodiment with reference to the drawings. They show: Fig. 1 a perspective of a pipe connecting device according to the invention in an exploded view; Fig. 2 a sealing ring of the pipe connection device of Fig. 1 in a perspective; Fig. 3 a clamping segment of a clamping ring of the pipe connection device of Fig. 1 in a perspective; Fig. 4 the clamping segment of Fig. 1 with a holding element in a perspective; Fig. 5 a part of a clamping ring of the pipe connection device of Fig. 1 in a perspective; Fig. 6 part of the sealing ring of Fig. 2 with inserted clamping segment and Fig. 7 a sectional view of a pipe connecting device in the assembled state.

[0015] In the Fig. 1 shows a pipe connection device 1 according to the invention, which contains a sleeve-shaped receiving part 2 for receiving a pipe end, a pressure component 4 connected to the receiving part 2 via screws 3 so as to be adjustable in the axial direction, and a sealing and holding device 5 arranged between the receiving part 2 and the pressure component 4 for the sealed holding of the pipe end within the receiving part 2.

[0016] The sealing and holding device 5 comprises a sealing ring 6, preferably made of an elastomeric material, and a clamping ring 7 formed by a plurality of radially movable clamping segments 8. The sealing ring 6 has an inner hollow-cylindrical part 9, which bears against the outside of the pipe, with an inwardly projecting inner annular guide web 10, a conical central part 11, which bears against the receiving part 2, and a cylindrical outer part 12 with an inwardly angled outer annular guide web 13.

[0017] The receiving part 2 contains on the end face facing the pressure component 4 a conical contact flange 14 with a Fig. 7, for the contact of the conical central part 11 of the sealing ring 6. A connecting flange 16 provided with bores is provided at the end of the receiving part 2 opposite the contact flange 14. In the area of ​​the contact flange 14, the sleeve-shaped receiving part 2 has at least two radially projecting flanges 17 with through openings 18 for the screws 3.

[0018] The pressure component 4 consists of an annular pressure body 19 with a circumferential edge 20. On the inner side of the annular pressure body 19 facing the receiving part 2, a conical support surface 21 is provided for the clamping ring 7. The pressure component 4 also has radially projecting flanges 22 with through openings 23 for the screws 3.

[0019] As in Fig. 2, the sealing ring 6 contains spaced-apart, web-shaped spacers 24 on its inner side. The web-shaped spacers 24 are formed on the inner side of the outer cylindrical part 12 so as to project inwards and extend between the conical central part 11 and the outer guide web 13.

[0020] In the Fig. 3 and Fig. 4 shows a wedge-shaped clamping segment 8 of the clamping ring 7. The clamping segment 8 has on its radial outer side a recess 25 running in the axial direction of the clamping ring 7, i.e. transversely to the circumferential direction of the clamping ring 7, which is designed such that a spacer 24 of the sealing ring 6 can engage in this recess 25. An outer guide groove 26 runs perpendicular to the recess 25, i.e. in the circumferential direction of the clamping ring 7, wherein the recess 25 extends as far as the guide groove 26 in the embodiment shown. A second guide groove 27 is formed on the radial inner side of the clamping segment 8 and runs in the same direction as the first guide groove 26, i.e. likewise in the circumferential direction of the clamping ring 7. The two guide grooves 26 and 27 have a widening at the groove base to accommodate a correspondingly shaped thickening at the ends of the two guide webs 10 and 13 of the sealing ring 6.This results in better retention of the clamping segments 8 within the sealing ring 6.

[0021] On the side of the clamping segment 8 facing the sealing ring 6, a wedge-shaped projection 28 projecting in the circumferential direction is provided on its radial inner side and on the side opposite the projection 28, a Fig. 4. The side of the clamping segment 8 facing the sealing ring 6 further has a profiled first shoulder 30 projecting in the circumferential direction of the clamping ring 7 for engagement with the conical central part 11 of the sealing ring 6 and an adjoining first recess 31 for receiving a shoulder of an adjacent clamping segment 8.

[0022] On the side of the clamping segment 8 facing away from the sealing ring 6, a protruding second shoulder 32 for contact with the conical bearing surface 21 of the pressure component 4 and an adjoining second recess 33 are formed. On the radial inner side of the clamping segment 8, there is also a stepped recess 34 for receiving a Fig. 4 shown holding element 35 is provided.

[0023] The Fig. The holding element 35 shown in Figure 4 is inserted via a stepped upper part into the recess 34 on the radial inner side of the clamping segment 8 facing the pipe and is fixed to the clamping segment 8 via a locking connection. For this purpose, resilient locking lugs 36 are formed on the holding element 35, which engage in corresponding locking recesses 37 of the clamping segment 8. On the radial inner side facing the pipe, the holding element 35 has a plurality of rectangular indentations 38 for receiving holding means preferably made of carborundum. This can increase the clamping properties and in particular the grip. The holding element 35 can also have a profile on its inner side in the form of depressions, elevations, serrations or the like. In addition, the holding elements 35 can be made of a plastic and provided with a carborundum powder coating.

[0024] The clamping ring 7 formed from several clamping segments 8 is in Fig. 5. The individual clamping segments 8 are not firmly connected to one another. Only the projection 28 of each clamping segment 8 projects into the recess 29 of an adjacent clamping segment 8. The same applies to the shoulders 30 and 32, which engage in the recesses 31 and 33 of the adjacent clamping segments 8 and cover the adjacent clamping segments 8. This forms a substantially continuous conical contact surface for the conical central part 11 of the sealing ring 6 and an oppositely conical contact surface for the conical support surface 21 of the pressure component 4. The projections 28 prevent parts of the surface of the sealing ring 6 from being pressed into the resulting gaps between the individual clamping segments 8 during assembly of the pipe connection device 1 and in particular when tightening the clamping ring 7.The shoulders 30 of the clamping segments 8 facing the sealing ring 6 are profiled on their outer sides, which ensures a good hold of the clamping segments 8 on the inside of the sealing ring 6.

[0025] In Fig. 6 shows the arrangement of a clamping segment 8 on the sealing ring 6. The clamping segment 8 is inserted into the sealing ring 6 such that the shoulder 30 (not visible here) points towards the conical central part 11 of the sealing ring 6. The clamping segment 8 engages with its outer guide groove 26 in the circumferential outer guide web 13 of the sealing ring 6, while the second guide groove 27 engages with the circumferential inner guide web 10 of the sealing ring 6. The clamping segment 8 is thus securely guided in the sealing ring 6 and is held or positioned in the circumferential direction by the spacer 24 in the sealing ring 6. For this purpose, the recess 25 (not visible here) engages in the spacer 24 of the sealing ring 6 (likewise not visible here). The clamping segments 8 are held at a certain distance in the circumferential direction by the spacers 24 which are spaced apart from one another in the circumferential direction of the sealing ring 6.A firm connection between the clamping segments 8 is not required.

[0026] Fig. Figure 7 shows a longitudinal section of the pipe connection device 1 according to the invention in an assembled state. The sealing and holding device 5 is clamped between the receiving part 2 and the pressure component 4 by means of the clamping ring 7 mounted on the sealing ring 6. The sealing ring 6 rests with the outer side of its conical central part 11 against the conical contact surface 15 of the contact flange 14 on the receiving part 2. The clamping segments 8 rest with their first shoulders 30 on the inner side of the conical central part 11 of the sealing ring 6. With their oppositely inclined second shoulders 32, the clamping segments 8 are supported on the conical inner contact surface 21 of the pressure component. The circumferential edge 20 of the pressure component 4 essentially encloses the sealing and holding device 5.

[0027] The clamping segments 8 are held at a fixed distance from one another in the circumferential direction by the spacers 24 (not shown here) and are securely guided by the guide webs 10 and 13 in the sealing ring 6, which engage in the corresponding guide grooves 26 and 27. If the pressure component 4 is clamped with the aid of the Fig. When the screws 3 and associated nuts 39 shown in Figure 1 are tightened axially against the receiving part 2, the wedge-shaped clamping segments 8 are moved radially inward and, under pressure, brought into contact with the outside of a pipe end inserted into the receiving part 2 by the annular pressure component 4. This allows the pipe end to be sealed and held firmly in the receiving part 2.

Claims

[1] Pipe connection device (1) with a sleeve-shaped receiving part (2) for receiving a pipe end, a pressure component (4) which is connected to the receiving part (2) so as to be adjustable in the axial direction, and a sealing and holding device (5) arranged between the receiving part (2) and the pressure component (4) for the sealed retention of the pipe end within the receiving part (2), wherein the sealing and holding device (5) comprises a sealing ring (6) and a clamping ring (7) made up of a plurality of radially movable clamping segments (8), wherein the sealing ring (6) has spaced-apart spacers (24) on its inner side, characterized by that the clamping segments (8) have on their radial outer side a recess (25) extending in the axial direction, into which a spacer (24) of the sealing ring (6) engages. [2] Pipe connecting device (1) according to claim 1, characterized bythat the spacers (24) are designed in the form of webs which are formed on the inside of an outer cylindrical part (12) of the sealing ring (6) in a way that projects inwards. [3] Pipe connecting device (1) according to claim 1 or 2, characterized by that the clamping segments (8) have at least one guide groove (26, 27) for engagement with an associated guide web (10, 13) on the sealing ring (6). [4] Pipe connecting device (1) according to claim 3, characterized by that the clamping segments (8) have on their radial outer side an outer guide groove (26) for engagement in a circumferential outer guide web (13) of the sealing ring (6). [5] Pipe connecting device (1) according to claim 3 or 4, characterized by that the clamping segments (8) have on their radial inner side an inner guide groove (27) for engagement in a circumferential inner guide web (10) of the sealing ring (6). [6] Pipe connecting device (1) according to one of claims 1 to 5, characterized by that on the side of the clamping segments (8) facing the sealing ring (6), on their radial inner side, there is arranged a wedge-shaped projection (28) projecting in the circumferential direction of the clamping ring (7) and on the side opposite the projection (28) there is arranged a recess (29) for the positive engagement of the wedge-shaped projection (28) of an adjacent clamping segment (8). [7] Pipe connecting device (1) according to one of claims 1 to 6, characterized by that the clamping segments (8) are wedge-shaped. [8] Pipe connecting device (1) according to one of claims 1 to 7, characterized by that the clamping segments (8) have a first shoulder (30) projecting in the circumferential direction of the clamping ring (7) for bearing against a conical central part (11) of the sealing ring (7) and a second shoulder (32) for bearing against a conical bearing surface (21) of the pressure component (4). [9] Pipe connecting device (1) according to one of claims 1 to 8, characterized by that a step-shaped recess (34) for receiving a holding element (35) is provided on the radial inside of the clamping segments (8). [10] Pipe connecting device (1) according to claim 9, characterized by that the holding element (35) is fixed to the clamping segment (8) via a locking connection (36, 37). [11] Pipe connecting device (1) according to claim 10, characterized by that the locking connection (36, 37) comprises locking lugs (36) arranged on the holding element (35) for locking engagement in corresponding locking recesses (37) of the clamping segment (8). [12] Pipe connecting device (1) according to one of claims 9 to 11, characterized by that the holding element (35) has a profiling or rectangular indentations (38) on the radial inner side facing the pipe end for receiving holding means made of carborundum.

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