DE102006042079B4 - Means for connecting zusammenzufugender ends of two plastic bands to form a coil in a winding device - Google Patents

Abstract

Means for connecting the mating ends of two plastic tapes, which can be inserted successively into a winding device to form a coil for in-line renovation of pipelines on site, wherein the mutually laying during laying side edges of each plastic strip means for positive connection with each other, wherein the plastic bands have radially outwardly directed longitudinal webs with longitudinal grooves between them, and wherein the plastic bands have the same width and matching shape, characterized in that for joining the two abutting ends (2, 6) of two consecutive plastic bands for the winding (1, 5) a connector (10) is arranged between them, which has a transverse to the longitudinal extent of the plastic bands (1, 5) aligned over its entire width reaching sealing ridge (11), on both sides in each case at least two in the direction of the longitudinal Extension of the plastic bands (1, 5) extending fingers (15.1, 15.2) are integrally formed, which in corresponding longitudinal grooves (3.2, 7.2) of the ends (2, 6) of the plastic bands (1, 5) are insertable, wherein ...

Description

The The invention relates to means for connecting the ends to be joined two plastic bands, to form a coil for In-line rehabilitation of pipelines on site consecutively insertable into a winding device are, wherein the juxtaposing during winding side edges each Plastic tape means for positive connection with each other have, wherein the plastic bands radially outward directed longitudinal webs with longitudinal grooves between them, and wherein the plastic bands are the same Width and matching Have shape.

To rehabilitate pipes, especially concrete, it is among other things EP 23 242 such as EP 109,413 known to produce in-line renovations by means of a winding device arranged on the tube mouth of a plastic strip which has a smooth inner surface and which is provided to increase the stability with outer, radially projecting longitudinal webs, between which open longitudinal grooves. Formed to the winding, the longitudinal webs are directed to the outside and the longitudinal grooves open to the outside.

The two edges of the plastic strip are designed so that the one edge of the plastic strip as a groove and the other edge are formed as a depressible into this groove bar, which engage in the manufacture of the coil pressed together during winding form-fitting manner. From the EP 0 266 720 is known, the two adjoining with their longitudinal edges of adjacent facing edges of a strip wound tube along the spiral connection for joining the side edges, the terminal ribs - each offset by a winding length - are overlapped. A teaching for connecting the abutting end edges contains the EP 0 266 720 Not. The winding thus produced is advanced with a progressive joining of the plastic tape at each revolution by a bandwidth. In particular, in case of rehabilitation with large or larger diameter pipes, - a pipe diameter of 1.50 m requires for a tape width of 160 mm for 1 m winding feed about 30 m plastic tape - in order to bridge the distance between two inspection shafts, for example, 80 m smoothly, would have to be used 2,400 m plastic tape. A length that can neither be stored on standard transport drums nor handled in one piece.

Consequently the task is to specify means with which an in-line Rehabilitation of the pipe by "denomination" of the plastic tape so allows is that the ends of two consecutive, to each other Mating Belting be connected with each other in such a way that a tight connection is created, which also form together with the plastic tape to the winding leaves, and that is safe and easy to handle on site.

The solution This task is for generic means defined by the characterizing features of the independent main claim; Advantageous developments and preferred embodiments describe the dependent under claims

When Means to join of the two abutting oneself Ends two for the winding of successive plastic bands is a connector between arranged this. This has a transversely oriented to the longitudinal extent of the plastic belts, on the entire width-reaching sealing ridge on, on both sides each at least two extending in the direction of the longitudinal extent of the plastic bands Fingers are formed. These fingers are in corresponding longitudinal grooves the ends of the plastic bands insertable, wherein at least the inside of the sealing bar with the insides of the both plastic bands joined together are flush, so that these in the wound state without impact and thus smoothly merge into each other.

there The fingers are advantageously symmetrical to the center of the connector arranged, with the fingers of one side with the fingers of the other side can also lie in line. A very good connection is reached when the number of fingers in the cross section of the Number and shape of the longitudinal grooves between the longitudinal webs correspond. This bridges the gap Connector the two to be connected ends of the two in the manufacture of the roll of successive plastic bands and fingers lie with positive locking in the associated longitudinal grooves.

Of the Connector is further formed so that the inside of the sealing bar is flush with the insides of leading and appending tube windings, so that at least the insides of the joined plastic bands in the wound state without shock and thus smoothly merge. This bump freedom lets the the streaming favorable smoothness of the pipe to full advantage and prevents otherwise at joints Hard to prevent deposits with flowing in the pipes wastewater with Pollution loads.

Next, the connector at its transverse sealing ridge on both sides of protrusions. These are in accordance with the mutually opposite edge regions of the plastic bands so formed, that they have strip-shaped projections on one side and groove-like projections on the other side. Joined to the ends of the two plastic tapes to be joined so their lateral connection areas continue without impact. This makes it possible that in the manufacture of the coil, the adjacent connection areas of the preceding plastic band with those of the following plastic band and cooperate over the connector so that the strip-like projections of the connector supernatant in the grooves of the band edge, in the strips of the tape as well can be pressed into the groove-like projections of the connector projection and thus allow a continuous connection across the junction.

Advantageous are to reduce the bending resistance of the fingers of the connector, into the grooves between the longitudinal webs engage, designed as hollow profiles. Alternatively and with further reduced bending resistance, the fingers of the connector are U-shaped profile. About the Reduction of the bending resistance also becomes a result Material savings achieved.

A further advantageous possibility to better match the connector to a rounding of the to be formed Wickels is the fingers with small angular position to the inner surface of the Seal of the connector to this form. There is one Angular position of the fingers each one of the sides against the Sealing ridge certain level of at most 6 ° too for smaller ones Diameter of the pipes to be rehabilitated sufficient. In general have angular positions from 3 ° to 5 ° proven. By this angular position becomes a "gentler" transition from the one end of the one plastic band to the beginning of the to be joined Plastic tape reaches, which after passing through the winding device fits well to the curve of the wrap.

The for this The purpose of connectors used advantageously from the same Plastic produced, as well as the plastic bands. Since these are extruded, are suitable thermoplastics. Of these, preference is given Polyvinyl chloride used, in particular as PVC-HI because of the impact resistance Use finds. This plastic also applies to the manufacture the plastic bands by extrusion application, so that here same plastics for the plastic belts like also for the connectors are used. The use of thermoplastic Plastics allows the production of the connectors by injection molding. Also a fiber reinforcement may be provided to provide the desired To achieve properties.

Around the inserted connector in its drawer between the end of the Previous plastic tape and that of the following can be secured over the Form fit also an adhesion of the fingers of the connector and the grooves of the plastic bands be provided. Serve the known per se adhesive for plastic, in particular special PVC adhesive. Alternatively, melted or welded joints can be used be used for fixing the fingers in the longitudinal grooves, indifferent, whether the welding thermally or by means of ultrasound. Fixing the Fingers in the longitudinal grooves by gluing or welding thereby favored by the use of the same plastics.

In Advantageous development, the connector for mechanical Securing the connection on both sides of the sealing bar one each finger-guided, after insertion of the connector in the end of the plastic tape with corresponding holes of the longitudinal webs aligned bore on. After joining is used for the mechanical connection of the ends of the plastic belts the connector through this then a total of aligned holes Locking pin pushed through. With this locking pin is beside the positive or glued connection also reaches a traction, so that the thus secured connection considerable force effects, such as they occur during manufacture of the roll in the winding device can, Can withstand.

Becomes preparing the preparation of a coil, must be the beginning of the first Bandes are introduced into the winding device. This introduction will due to the rigidity of the plastic band, which is due to the for sufficient stability the winding on the outer wall the plastic strip necessarily provided radially projecting longitudinal webs, difficult. This can be because of the considerable mechanical stress the introduced end snap back the plastic strap, endanger the operating personnel and so cause significant injuries to employees. To avoid this, be advantageous in the introduced End of the first of the plastic bands the longitudinal webs provided with a first transverse groove, these longitudinal webs at least until half height it is self-evident that the separation the longitudinal webs up to half the height, in the limit, continue to be led to the plastic tape can.

Advantageously, the transverse groove is provided at a distance from the end of this plastic strip, which is greater than the length of the fingers to be inserted in the longitudinal grooves. In order to achieve a reduction of the stiffening over a greater length of the plastic strip, advantageously, further, mutually spaced transverse grooves are provided where at the distance from each other is approximately half the width of the plastic strip. The transversely grooved area advantageously extends over a length corresponding to the pipe circumference, so that the tension built up during the production of the reel can be reduced over a full course of the reel. Thus, the grooved end of the first of the plastic straps can be inserted into the winding device without the tension that occurs at the non-transverse ends of the plastic strap. The following, connected via the connectors used plastic bands run without problems in the winding device, so that the transverse grooves remain limited to the beginning of the first of the required for a roll to be introduced for pipe winding plastic straps.

The essence of the invention will become apparent in the 1 to 6 illustrated embodiments illustrated in more detail; show:

1 : Wrap with plastic bands assembled by connectors (Schematic illustration with cut-out enlargement);

2 : Connector with ends of the plastic strip to be joined together (exploded view)

3 : Connector (perspective view);

4 : Connector (supervision);

5 : Connector sectional view,

5a : Section AA ( 4 )

5b : Section BB ( 4 )

5c : Cross section CC ( 4 ) of the connector inserted in a tape end;

6 : Connector (side view);

The 1 shows a situation in the production of the required for an in-line refurbishment (a pipe, not shown) winding from a (already wound) plastic tape 1 and a (tapered) plastic band 5 whose ends 2 and 6 by means of an interconnected connector 10 are joined together. The winding device for clarity is not shown with. The longitudinal webs 3.1 the already wound band with the longitudinal grooves 3.2 between them, aligned with the longitudinal bars 7.1 of the incoming plastic band 5 in between with the longitudinal grooves 7.2 , To both ends 2 and 6 Connecting to each other is a connector 10 between both ends 2 and 6 inserted, whose finger 15.1 and 15.2 in these longitudinal grooves 3.2 and 7.2 lie.

The with the connector 10 to be joined together 2 and 6 the two plastic bands 1 and 5 are in 2 clarified, but it does not depend on the issue of inflow and outflow of plastic straps. Between both ends 2 and 6 is the one with his fingers 15.1 and 15.2 on the between the longitudinal bars 3.1 and 8.1 opening longitudinal grooves 3.2 and 8.2 aligned connectors 10 intended. The edge areas of both plastic bands 1 and 5 are consistently formed. So they point to one side of the plastic bands 1 respectively. 5 a strip-like formation 4.1 respectively. 8.1 on, while these on the other, opposite sides with nutartiger Anformung 4.2 respectively. 8.2 are provided.

Since the one side of the plastic band always cooperates in the following revolution with the other side of the plastic strip during manufacture of the roll, the strip-like Anformung be 4.1 respectively. 8.1 in the winding device (not shown) in the production of the coil in the groove-like Anformung 4.2 respectively. 8.2 pressed, so that a positive connection is given. This is due to the lateral projections with a strip-like Anformung 14.1 and with groove-like shaping 14.2 over the bump of the two ends 2 and 6 the plastic bands 1 and 5 continued, with the strip-like Anformung 14.1 in the distance of a winding circumference located groove-like Anformung 4.2 respectively. 8.2 of the plastic belt presses while the groove-like Anformung 14.2 at the distance of a winding circumference strip-like Anformung 4.1 respectively. 8.1 receives. This is the inside 12 of the connector 10 flush with the inner surfaces of the plastic straps 1 and 5 ,

In the 3 to 6 are details of the connector 10 shown, the central body of the sealing bar 11 is. This is transverse to the longitudinal extent and forms with its inside 12 the continuation of the insides of the plastic bands 1 respectively. 5 , At its two end surfaces 13.1 and 13.2 close the end faces of the ends 2 and 6 the two plastic bands to be joined 1 and 5 to achieve a tight connection at the end surfaces 13.1 and 13.2 issue. Right-angled from the sealing bar 12 stand the fingers 15.1 . 15.2 from. Their arrangement corresponds to the arrangement of the longitudinal grooves 3.2 respectively. 7.2 the plastic bands 1 respectively. 5 , That's how your fingers can be 15.1 and 15.2 in the longitudinal grooves 3.2 respectively. 7.2 the ends 2 respectively. 6 the plastic bands to be joined 1 respectively. 5 introduce.

The finger 15.1 and 15.2 , in the sections AA in 5a and BB in 5b shown in more detail, are formed as hollow sections. As a central body extends the sealing bar 11 over the entire width of the ends 2 and 6 the two plastic bands to be joined together 1 and 5 ( 1 . 2 ). The inside of the wrap ( 1 ) forming plastic bands 1 and 5 corresponding inner surface 12 The sealing bar is designed so that it is flush with the insides of the plastic straps. At the two transverse end surfaces 13.1 and 13.2 of the sealing bridge 11 lie the end faces of the ends 2 respectively. 6 the plastic bands to be joined together 1 respectively. 5 at. In the 5a is also dashed angled arrangement of the fingers 15.1 and 15.2 indicated schematically, wherein the angle is such that the finger ends are lowered by 10% of the maximum finger length, so that the angle α is less than about 6 °.

On both sides of the sealing bridge 11 extend the - here shown as hollow profiles - fingers 15.1 and 15.2 , These are used to connect the plastic bands to be joined together 1 and 5 in the between the longitudinal webs 3.1 respectively. 7.1 opening longitudinal grooves 3.2 respectively. 7.2 introduced, which is already given by the positive connection a firm connection. To increase the strength, the end surfaces 13.1 and 13.2 of the connector with the end surfaces of the ends 2 respectively. 6 the plastic bands to be joined together 1 respectively. 5 and / or in the longitudinal grooves 3.2 respectively. 7.2 inserted finger 15.1 . 15.2 glued into these.

For backup are in the fingers 14.1 and 15.2 aligned holes 18 provided with the inserted connector 10 with in the longitudinal webs 3.1 and 7.1 provided (not labeled here) holes are aligned and so the insertion of a locking pin 19 (S. 5c ) allow. This locking pin 19 provides a mechanical safeguard against inadvertent release of the connection of the connector with one of the ends 2 or 6 the plastic bands to be attached 1 or 5 and thus increases the safety of the connections made by such connectors.

Claims (12)

Means for connecting the mating ends of two plastic bands, which can be inserted successively into a winding device to form a coil for in-line renovation of pipelines, wherein the side edges of each plastic strip, which lie against one another during winding, have means for positive connection with each other, wherein the plastic bands have radially outwardly directed longitudinal webs with longitudinal grooves between them, and wherein the plastic bands have the same width and matching shape, characterized in that for joining the two abutting ends ( 2 . 6 ) of two successive plastic strips for the winding ( 1 . 5 ) a connector ( 10 ) is arranged between these, one transverse to the longitudinal extent of the plastic belts ( 1 . 5 ) aligned over its entire width reaching sealing ridge ( 11 ), on both sides of each at least two in the direction of the longitudinal extent of the plastic bands ( 1 . 5 ) extending fingers ( 15.1 . 15.2 ) are formed, which in corresponding longitudinal grooves ( 3.2 . 7.2 ) of the ends ( 2 . 6 ) of plastic straps ( 1 . 5 ) are insertable, wherein at least the inside ( 12 ) of the sealing bar ( 11 ) with the insides of the two plastic strips ( 1 . 5 ) is flush, so that these in the wound state without impact and thus smoothly merge into each other. Means for joining according to claim 1, characterized in that the number of both sides of the sealing web ( 11 ) molded fingers ( 15.1 . 51.2 ) the number of longitudinal grooves ( 3.2 . 7.2 ) between the longitudinal webs ( 3.1 . 7.1 ) of plastic straps ( 1 . 5 ) corresponds. Means for bonding according to claim 1 or 2, characterized in that the sealing web ( 11 ) formed on both sides fingers ( 15.1 . 15.2 ) of the connector ( 10 ) symmetrical to the center of the sealing web ( 11 ) are distributed. Means for joining according to one of claims 1 to 3, characterized in that the transverse sealing web ( 11 ) outside areas ( 14.1 . 14.2 ) corresponding to the mutually opposite edge regions ( 8.1 ; 8.2 ) of plastic straps ( 1 . 5 ) are formed so that the merged with the winding edge areas ( 8.1 ; 8.2 ) are cooperatively insertable into each other without impact. Means for bonding according to one of claims 1 to 4, characterized in that at least some, preferably all, of the longitudinal grooves ( 3.2 . 7.2 ) of the ends ( 2 . 6 ) of plastic straps ( 1 . 5 ) engaging fingers ( 15.1 . 15.2 ) of the connector ( 10 ) are formed as hollow profiles. Means for joining according to one of claims 1 to 5, characterized in that at least some, preferably all of the in the longitudinal grooves ( 3.2 . 7.2 ) of the ends ( 2 . 6 ) of plastic straps ( 1 . 5 ) engaging fingers ( 15.1 . 15.2 ) of the connector ( 10 ) are formed as U-shaped profiles. Means for joining according to one of claims 1 to 6, characterized in that the fingers ( 15.1 . 15.2 ) of the connector ( 10 ) at a small angle (α) to that from the inside ( 12 ) of the sealing web ( 11 ) are formed on this particular level, wherein the angle (α) is at most 6 °, preferably 3 ° to 5 °. Means for bonding according to one of claims 1 to 7, characterized in that the Ver binder ( 10 ) is made of the same plastic as the plastic tapes to be formed into the roll ( 1 . 5 ), wherein the plastic is preferably a thermoplastic material. Means for bonding according to claim 8, characterized in that that the thermoplastic material is a polyvinyl chloride, preferably PVC HI is Means for joining according to one of claims 1 to 9, characterized in that the end surfaces ( 13.1 . 13.2 ) of the sealing bar ( 11 ) of the connector ( 10 ) with the end surfaces of the ends ( 2 . 6 ) of the plastic bands to be joined ( 1 . 2 ) and / or in the longitudinal grooves ( 3.2 . 7.2 ) of the ends ( 2 . 6 ) of the plastic bands to be joined ( 1 . 2 ) introduced finger ( 15.1 . 15.2 ) of the connector ( 10 ) with these longitudinal grooves ( 3.2 . 7.2 are glued. Means for joining according to one of claims 1 to 9, characterized in that the end surfaces ( 13.1 . 13.2 ) of the sealing bar ( 11 ) of the connector ( 10 ) with the end surfaces of the ends ( 2 . 6 ) of the plastic bands to be joined ( 1 . 2 ) and / or in the longitudinal grooves ( 3.2 . 7.2 ) of the ends ( 2 . 6 ) of the plastic bands to be joined ( 1 . 2 ) introduced finger ( 15.1 . 15.2 ) of the connector ( 10 ) with these longitudinal grooves ( 3.2 . 7.2 are welded. Means for joining according to one of claims 1 to 11, characterized in that the connector ( 10 ) on both sides of the sealing web ( 12 ) of the connector ( 11 ) one each through the fingers ( 15.1 ; 15.2 ) guided, with corresponding holes of the longitudinal webs ( 3.1 ; 7.1 ) aligned bore ( 18 ), through which a pin ( 19 ) for mechanical connection with the ends ( 2 . 6 ) of plastic straps ( 1 ; 5 ) is pluggable.