Method for attaching a liner to a hose and the liner

Abstract

The present invention relates to a method for attaching a liner (4) to a hose (1), particularly a calibration hose, the method comprising: preparing a hose (1) having a first end (2) and a second end (3) on the opposite side; marking (5) the hose (1); turning the hose (1) inside out with the first end (2) facing outwards (13) toward the second end (3), or vice versa, to the marking (5) to form an inversion point (12); inserting the liner (4) into the hose (1) and positioning it at the inversion point (12) of the hose (1); inserting a pouch (6) into the area of ​​the inversion point within the liner (4) and inflating it; introducing an attachment means (7) between the liner (4) and the hose (1) at the inversion point (12) so that the liner (4) is held in place by the hose (1); removing the pouch (6) and returning the hose (1) to its original position.

Description

Technical Field

[0001] The present invention relates to a method for attaching a liner to a hose, particularly a calibration hose, and to a liner attached to a hose.

Background Art

[0002] DE 44 26 151 A1 describes providing a liner for the rehabilitation of pipes. In this method, a so-called liner, i.e., a flexible fiber hose, is reversely inserted into a pipe such as a pipeline or a sewer pipe. This fiber hose is impregnated with a curable resin and applied to the inner surface of the pipe to be rehabilitated.

[0003] A liner is understood to mean a flexible fiber hose impregnated with resin, which is inserted into a pipeline or sewer pipe to be rehabilitated by reversing it, i.e., turning the inside out, and hardened using heat, UV irradiation, or at room temperature.

[0004] The above type of lining involves inserting a fiber hose impregnated with resin into the rehabilitation part of a pipe by reversing it (turning the inside out) using an auxiliary hose called a calibration hose. After the fiber hose impregnated with resin is hardened, the calibration hose is pulled back and withdrawn (reverse inversion method). As a result, a completely formed and hardened lining is provided over the selected length and cross-section of the pipe.

[0005] When rehabilitating only a small area of a pipe, for example, a so-called packer is used. This is a bladder that can be inflated without passing steam, and various sizes and connection angles are available, for example, from Brawo Systems. This company sells custom-made special packers equipped with satellite bladders that can be inflated and inserted / positioned using a flexible sliding rod with a length of about 35 cm. The disadvantage of this solution is that various packers are required depending on the nominal diameter of the pipe to be rehabilitated, which is very costly. [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] Therefore, the present invention is based on the problem of providing an improved alternative to known methods for attaching liners to hoses and known methods for providing lining to pipes, particularly for rehabilitation. The present invention is further based on the problem of providing liners. [Means for solving the problem]

[0007] According to the present invention, this problem is solved with respect to the method according to the subject matter of claim 1. With respect to the liner, the above problem is solved with respect to the subject matter of claim 10.

[0008] This problem is specifically solved by a method of attaching liners to hoses, particularly calibration hoses, and this method is Prepare a hose having a first end and a second end on the opposite side. Mark the hose, The hose is turned inside out with the first end facing the second end, or vice versa, so that it is inverted up to the marking, thereby forming a point of inversion. Insert the liner into the hose and position it at the reversal point. Position the pouch in the area of ​​the inversion point within the liner and inflate it. An attachment means is inserted between the liner and the hose at the reversal point so that the liner is held by the hose. Remove the bag and return the hose to its original position. This includes the following.

[0009] Furthermore, a key advantage of the present invention is that the liner is pre-positioned within the hose and connected to the hose by an attachment means before being inserted into the pipe to be rehabilitated. This is done by inserting the attachment means between the liner and the hose at the point where the hose is turned over. Once the liner is pre-positioned and held in place by the attachment means, the pouch is pulled out and the portion that was turned over on the outside of the hose is turned back. In this state, the liner is preferably completely positioned inside the hose.

[0010] Conversely, a hose that has been inverted returns to its original state. The original state refers to the state of the hose before and after one of its ends is turned inside out, particularly the initial state. In the initial state, the hose preferably does not have the first and / or second end inverted.

[0011] When lining a pipe, the liner is inserted into the pipe by inverting the hose and positioning it appropriately. Therefore, the method of the present invention has the advantage of not requiring the use of special packers, such as steam-proof, inflatable bags. Furthermore, existing or conventional calibration hoses and liners can be used. Thus, the method of the present invention greatly simplifies the attachment of liners to hoses and the lining of pipes. This also leads to cost reduction.

[0012] To create a reversal point, turn the first end of the hose outwards towards the second end until you reach the marking. Alternatively, you can reverse the hose to create a reversal point, that is, turn the second end of the hose outwards towards the first end until you reach the marking. In either case, the hose will be in a reversed state.

[0013] Advantageous embodiments of the present invention are provided for by the dependent claims.

[0014] In a preferred embodiment, the portion of the pipe to be rehabilitated is identified and used to determine the marking on the hose. That is, the location of the portion of the pipe to be rehabilitated is detected in advance, particularly using a camera, to determine the distance required for marking from at least one end of the hose. This allows for easy and precise placement of the liner at the desired point to be rehabilitated within the pipe.

[0015] Preferably, an adhesive, particularly preferably a cyanoacrylate adhesive, is used as the attachment means. The cyanoacrylate adhesive may be a so-called instant adhesive. The adhesive can advantageously connect the liner to the hose, in particular when inverting and inserting it into the pipe, so that the liner is held in place by the hose, and / or when removing the hose from the pipe, so that the liner is removed from the hose.

[0016] In another preferred embodiment, the pouch is inflated only to the extent that the mounting means can be inserted between the liner and the hose at the inversion point. That is, the pouch is inflated radially to the extent that the liner is held by the hose and the mounting means can be introduced, particularly inserted, between the liner and the hose. The contact pressure of the pouch with respect to the liner, and thus the hose, is preferably selected so that the mounting means can enter, particularly flow, between the liner and the hose at the inversion point. This facilitates the insertion of the mounting means.

[0017] In addition to or instead of this, after inserting the attachment means between the liner and the hose at the reversal point, the pouch is further inflated. This allows for the formation of a secure connection between the liner and the hose.

[0018] Preferably, the pouch is removed after the mounting means has become strong enough to hold the liner in place on the hose. The advantage of this is that the pouch can be left inside the liner only for as long as needed. This also saves time. If adhesive is used as the mounting means, the pouch may be removed and then the adhesive may be allowed to cure, for example, partially or completely.

[0019] If the liner protrudes slightly from the inversion point of the hose, it is particularly advantageous because it facilitates the introduction of the mounting means. Preferably, the liner is made to protrude 0.5 cm to 5 cm, particularly preferably about 1 cm to 2 cm, and even more preferably about 1 cm from the inversion point of the hose.

[0020] In one embodiment, the hose is inverted so that the liner is positioned or stopped within the hose, particularly by turning the inside out, and inserted into the pipe. Preferably, a reversing device is used to reversely insert the liner into the pipe. The liner is preferably a flexible fiber hose impregnated with resin. The liner is particularly preferably cured by heat or UV irradiation and / or at room temperature.

[0021] Once the liner is installed or placed inside the pipe, the hose is removed from the pipe. Preferably, only the liner is thus placed in the part of the pipe to be rehabilitated.

[0022] By dependent features, a liner installed in a hose by the method of the present invention is disclosed and claimed.

[0023] Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings. In the drawings, elements having the same function are denoted by the same reference numerals.

Brief Description of the Drawings

[0024] [Figure 1] It is a schematic diagram of various steps of a method for attaching a liner to a hose according to the present invention. [Figure 2] It is a schematic diagram of various steps of a method for attaching a liner to a hose according to the present invention. [Figure 3] It is a schematic diagram of various steps of a method for attaching a liner to a hose according to the present invention. [Figure 4] It is a schematic diagram of various steps of a method for attaching a liner to a hose according to the present invention. [Figure 5]This is a schematic diagram of various steps in the method for attaching a liner to a hose according to the present invention. [Figure 6] This is a schematic diagram of various steps in the method for attaching a liner to a hose according to the present invention. [Figure 7] This is a schematic diagram of various steps in the method for attaching a liner to a hose according to the present invention. [Figure 8] This is a schematic diagram of the liner according to the present invention, installed at the mounting position inside the pipe. [Modes for carrying out the invention]

[0025] Only the elements essential for directly understanding the present invention are shown.

[0026] Figures 1 to 7 show various steps in the method of attaching the liner 4 to the hose 1 according to the present invention, and Figure 8 shows the attachment and positioning of the liner 4 to the pipe 20.

[0027] Figure 1 shows a hose 1 having a first end 2 and a second end 3, a so-called calibration hose. The calibration hose 1 is further preferably flexible enough to be bent up to 90 degrees with respect to its longitudinal axis. That is, the calibration hose 1 can preferably pass through bends of up to 90 degrees. The calibration hose 1 can be used with a liner 4 impregnated with epoxy resin and / or polyester resin.

[0028] The calibration hose 1 is preferably transparent and made of polyvinyl chloride material, particularly PVC material. The calibration hose 1 is preferably usable up to 50°C, and for example, up to 100°C if double-reinforced. The calibration hose 1 can also be loaded up to 0.5 bar and has a basis weight of 40 g / m 2 It should be noted that the calibration hose 1 is not limited to the above values. Other calibration hoses 1 can also be used as substitutes within the scope of the present invention.

[0029] In a pipe 20 such as a pipeline or sewer pipe, a predetermined portion thereof is rehabilitated using a liner 4. Such a liner 4 is preferably made of a woven or nonwoven fabric and is preferably elastic. The liner 4 is preferably a cloth hose, particularly a fabric hose, having longitudinal and transverse elasticity. This cloth hose is preferably made of polyethylene terephthalate, particularly PET. This cloth hose is preferably laminated with a film hose, and especially wrapped. The cloth hose and / or film hose are formed seamlessly. Furthermore, the cloth hose and film hose can be bent up to 90 degrees, that is, they can pass through bends of up to 90 degrees.

[0030] Liner 4 may be an adhesive containing a curable synthetic resin mixture, particularly preferably a curable epoxy resin mixture, or it may be a liner coated with such adhesive.

[0031] The curable synthetic resin mixture is preferably a two-component epoxy resin system in a metal bucket (hobbock), containing a resin component, particularly EP 50 A resin, and a curing agent component, particularly EP 50 B curing agent, with a filler added (thixotropic). Therefore, the curable synthetic resin mixture is advantageous as a solvent-free epoxy resin system that improves adhesion to conventional wastewater pipe materials and wet substrates, especially wet surfaces.

[0032] Liner 4 is impregnated with resin and wound to the appropriate thickness just before being inverted and inserted into pipe 20.

[0033] By measuring the pipe 20, preferably with a camera, it is determined where the liner 3 should be positioned within the pipe 20 in order to rehabilitate and repair the relevant portion. To position the liner 4 on the rehabilitated portion, a corresponding marking 5 is preferably made on the calibration hose 1, which is inserted into the pipe 20, at the point where one end of the liner 4 should stop, preferably with a waterproof felt-tip pen. This makes it possible to determine where the liner 4 should stop and be attached on the calibration hose 1.

[0034] In Figure 2, the first end 2 of hose 1 is reversed toward the second end 3, and hose 1 is reversed until it reaches the marking 5, with the reversal point 12 on the marking 5. Next, as shown in Figure 3, the liner 4 is pulled into the reversed hose 1 and positioned at the reversal point 12 so that it will stop within an acceptable range at the rehabilitation point of pipe 20 later. The liner 4 can be inserted from the second end 3, or from the reversal point 12 located at the marking 5 toward the second end 3. The liner 4 is then positioned so that it protrudes slightly from the reversed hose 1, preferably about 0.5 cm to 5 cm from the reversal point 12, particularly preferably 1 cm to 2 cm, and even more preferably about 1 cm.

[0035] As shown in Figures 4 and 5, an inflatable bag 6 is then inserted into the liner 4 and hose 1, at least partially, preferably mostly. The expandable bag 6 can be anything that can be inflated, preferably a balloon-like object that can be inflated with compressed air.

[0036] Here, the bag 6 is inflated, preferably expanded, only to the extent that the liner 4 can no longer move relative to the calibration hose 1, while allowing the mounting means 7 to be introduced between the liner 4 and the hose 1 at the reversal point 12. This mounting means 7 is preferably introduced using an applicator 8, preferably an applicator with a conical tip. The mounting means 7 is preferably an adhesive. As the adhesive, commercially available adhesives suitable for the materials to be bonded, such as epoxy adhesives and hot melt adhesives, can be used, but so-called instant adhesives, especially cyanoacrylate adhesives, are preferably used. However, mounting means 7 other than adhesives can also be used.

[0037] The mounting means 7 is bonded at least at two points at this point, preferably at least 50% of the outer circumference of the liner, particularly preferably 80% or more, and even more preferably continuously over the entire outer circumference of the liner. The width of the connection surface 9 thus formed by the mounting means 7 is preferably 0.1 mm to 2 cm, particularly preferably 1 mm to 1 cm.

[0038] The pouch 6 can be further inflated, preferably so that the liner 4 is tightly fitted to the calibration hose 1. Preferably, the pouch 6 can be inflated to 1.5 bar, particularly preferably to about 2 bar. However, depending on the design, the pouch 6 can be inflated even further. Figure 6 shows, for example, the pouch 6 in an inflated state, with the liner 4 and calibration hose 1 radially expanded by the pouch 6.

[0039] After this, wait until the mounting means 7 securely holds the liner 4 to the hose 1. Preferably, wait until the adhesive has fully cured, especially until it is almost completely cured. When using ordinary cyanoacrylate adhesive, the waiting time for the liner 4 to be securely held to the calibration hose 1 is about 30 minutes. For other adhesives, this time can be adjusted until sufficient strength is obtained to securely hold the liner 4 to the hose 1.

[0040] Next, release the pressure from the bag 6, preferably as slowly as possible, and remove the bag 6. Reverse the calibration hose 1 again so that the liner 4 stops or is fixed in place within the hose 1. See Figure 7.

[0041] Next, optionally, the second end 3 or the first end 2 of the hose 1 can be closed, for example, by making a knot or using a clamp, to which a towing means 10, preferably a flat band, such as a wire, chain, or rope, can be attached. Preferably, the second end 3 is tied and the towing means 10 is attached to this knot. However, this step is not essential to the invention and is merely used to install the liner 4 on the pipe 20.

[0042] Figure 8 schematically shows how the liner 4 is installed inside the pipe 20. For example, DE 44 26 151 A1 describes in detail how the hose 1 is inserted into the pipe 20. The hose 1 may be inverted, that is, turned inside out, by an inversion device 11, so that the liner 4 is positioned outside 13 of the hose 1 and inside the pipe 20 in the correct position to be rehabilitated, and then inserted into the pipe 20. The hose 1 can be pressurized by injecting air or fluid into it with a pump.

[0043] The adhesive inside liner 4 hardens here. Heat may be applied, preferably by introducing steam into the hose, to accelerate the hardening process. For this purpose, temperatures of up to 80°C, and especially up to 110°C, can be used.

[0044] Once the synthetic resin mixture hardens, the liner 4 adheres to the inner wall of the pipe 20. By moving the traction means 10 along the hose 1 toward its second end 3 and the reversing device 11, the calibration hose 1 can be removed from the pipe 20.

[0045] Clearly, the present invention is not limited to the exemplary embodiments shown in the drawings and described in the specification. The liner 4 may be impregnated with resin at a later time. [Explanation of symbols]

[0046] 1 Hose / Calibration Hose 2. First end of the hose 3. The second end of the hose 4 Liners 5 Markings 6 pouches 7. Mounting means 8 Applicators 9 Connection surface 10 Traction means 11 Inverting device 12 turning points 13. Outside of the hose 20 pipes

Claims

1. A method for attaching a liner (4) to a hose (1), particularly a calibration hose, Prepare a hose (1) having a first end (2) and a second end (3) on the opposite side. A marking (5) is attached to the hose (1), The hose (1) is turned inside out with the first end (2) facing outwards (13) toward the second end (3), or vice versa, so that it is inverted to the marking (5) and the inversion point (12) is formed. Insert the liner (4) into the hose (1) and position it at the reversal point (12) of the hose (1). Insert the pouch (6) into the area of ​​the inversion point (12) within the liner (4) and inflate it. At the reversal point (12), an attachment means (7) is inserted between the liner (4) and the hose (1) so that the liner (4) is held on the hose (1). Remove the bag (6) and return the hose (1) to its original position. A method that includes doing so.

2. The method according to claim 1, characterized in that it is used to identify the portion of the pipe (20) that needs to be rehabilitated and to determine the marking (5) on the hose (1).

3. The method according to claim 1 or 2, wherein the mounting means is an adhesive, preferably a cyanoacrylate adhesive.

4. The method according to any one of the preceding claims, characterized in that the bag (6) is inflated only to the extent that the mounting means (7) can be introduced between the liner (4) and the hose (1) at the inversion point (12), and / or the bag (6) is further inflated after the mounting means (7) has been introduced between the liner (4) and the hose (1) at the inversion point (12).

5. The method according to any one of the preceding claims, characterized in that the bag (6) is removed after the mounting means (7) has become strong enough to hold the liner (4) on the hose (1).

6. The method according to any one of the preceding claims, characterized in that the liner (4) protrudes from the reversal point (12) by preferably 0.5 cm to 5 cm, particularly preferably about 1 cm to 2 cm, and even more preferably about 1 cm.

7. The method according to any one of the preceding claims, characterized in that the hose (1) is inverted, particularly with the inside facing outwards, and inserted into the pipe (20) so that the liner (4) stays inside the pipe (20).

8. The method according to claim 7, characterized in that the liner (4) is inserted into the pipe (20) by an inversion device.

9. The method according to claim 7 or 8, characterized in that the hose (1) is removed after the liner (4) is installed inside the pipe (20).

10. A liner (4) installed inside a hose (1), characterized in that the liner (4) described in any one of claims 1 to 6 is attached to the hose (1).

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