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DE-102024133074-A1 - Sealing tube with swelling element

DE102024133074A1DE 102024133074 A1DE102024133074 A1DE 102024133074A1DE-102024133074-A1

Abstract

The invention relates to a sealing tube (1) for sealing controlled crack joints in walls, comprising a base body (10) made of a first material for stabilizing the sealing tube (1), at least one crack guidance web (20) made of the first material or a second material, and at least one swelling element (30) for sealing against moisture, wherein the at least one swelling element (30) is arranged on the base body (10) and/or on the crack guidance web (20).

Inventors

  • Dennis Krasemann
  • Jürgen Krasemann

Assignees

  • Dennis Krasemann
  • Jürgen Krasemann

Dates

Publication Date
20260513
Application Date
20241112

Claims (20)

  1. Sealing tube (1) for sealing controlled crack joints in walls, comprising: a base body (10) made of a first material for stabilizing the sealing tube (1), at least one crack guidance web (20) made of the first material or a second material, and at least one swelling element (30) for sealing against moisture, whereby the at least one swelling element (30) is arranged on the base body (10) and/or on the crack guidance web (20).
  2. Sealing tube (1) according to Claim 1 , characterized in that the base body (10) has a hollow body and/or wherein the cross-section of the base body (10) has a thin-walled hollow profile, wherein preferably the cross-section is at least substantially circular.
  3. Sealing tube (1) according to one of the preceding claims, characterized in that the crack guidance web (20) has a substantially rectangular cross-section, wherein preferably the crack guidance web (20) radially projects from the base body (10), wherein in particular the crack guidance web (20) has a circular element (21) on the opposite side to the base body (10).
  4. Sealing tube (1) according to one of the preceding claims, characterized in that the base body (10) has at least two crack guidance webs (20).
  5. Sealing tube (1) according to one of the preceding claims, characterized in that the base body (10) has at least one, preferably four, particularly preferably six recesses (11), wherein in particular a swelling element (30) is held in each of the recesses (11).
  6. Sealing tube (1) according to one of the preceding claims, characterized in that the recess (30) has a circular or arc-shaped cross-section.
  7. Sealing tube (1) according to one of the preceding claims, characterized in that the swelling element (30) is encased with a protective layer (31), in particular a self-adhesive film, to prevent premature swelling of the swelling element (30), wherein preferably each swelling element (30) is separately encased with a protective layer (31).
  8. Sealing tube (1) according to one of the preceding claims, characterized in that the crack guidance web (20) has a recess (11) on the opposite side to the base body (10), in particular a circular or arcuate recess, wherein a swelling element (30) is received in the recess (11).
  9. Sealing tube (1) according to one of the preceding claims, characterized in that a base body (10) has at least four crack guidance webs (20), wherein two opposing crack guidance webs (20) form a pair.
  10. Sealing tube (1) according to one of the preceding claims, characterized in that crack guidance webs (20) from a pair have the same depth (T), wherein in particular different pairs have different depths (T).
  11. Sealing tube (1) according to one of the preceding claims, characterized in that forming elements (12) can be arranged on the base body (10), wherein the forming elements (12) are preferably designed as grooves (13) and/or locking elements (14), wherein in particular the forming elements (12) have an undercut.
  12. Sealing tube according to one of the preceding claims, characterized in that the forming elements (12) are arranged at least sectionally over the entire length (L) of the base body (10).
  13. Sealing tube (1) according to one of the preceding claims, characterized in that preferably one, particularly preferably two, shaping elements (12) are arranged between two crack guidance webs (20) circumferentially of the base body (10).
  14. Sealing tube (1) according to one of the preceding claims, characterized in that sealing webs (22) are arranged on the base body (10), wherein the sealing webs (22) are preferably made of a second material, wherein the sealing webs (22) are preferably arranged on the form elements (12).
  15. Sealing tube (1) according to one of the preceding claims, characterized in that the first material is harder than the second material.
  16. Sealing tube (1) according to one of the preceding claims, characterized in that the first material comprises polypropylene and/or polyvinyl chloride and the second material comprises thermoplastic elastomers and/or polyvinyl chloride with plasticizers.
  17. A method for manufacturing a sealing tube (1), in particular according to one of the preceding claims, comprising the following steps: - Extruding (S1) a base body (10) from a first material, - Extruding (S2) at least one crack guidance web (20) from a first or second material, - Joining (S3) the base body (10) and the at least one crack guidance web (20), - Attaching (S4) a swelling element (30).
  18. Procedure according to Claim 17 , comprising the following steps: - Extruding (S5) at least one sealing rib (22) from a second material, - Joining (S6) the base body (10) and the at least dest a sealing rib (22) to a form element (12) of the base body (10).
  19. Procedure for claiming a claim according to Claim 17 or 18 , characterized in that at least the base body (10) and the at least one crack guidance web (20) are extruded or co-extruded, in particular wherein the sealing web (22) is co-extruded with the base body (10) and crack guidance web (22).
  20. Procedure for claiming under one of the Claims 17 until 19 , characterized in that a base body (10) is first extruded and at least one crack guidance web (20) and/or sealing web (22) is co-extruded at a time offset, in particular 2 to 6 s, preferably 2.5 to 4 s, particularly preferably 3 s.

Description

The invention relates to a sealing tube with the features of claim 1 of a first aspect of the invention and to a method for manufacturing a sealing tube with the features of the independent method claim of a second aspect of the invention. Sealing tubes, also known as star tubes or shrinkage tubes in the prior art, are used in construction practice to seal controlled crack joints in concrete walls. Their main function is to guide cracks in a controlled manner and ensure a seal in the area of the controlled cracks. The principle of a sealing tube is to lengthen the water circulation path to prevent water from penetrating through the cracks. This lengthening of the water circulation path is achieved by sealing ribs, designed as profiled barrier anchors, which are embedded in the concrete. In the prior art, sealing tubes are constructed in two parts: an outer tube made of a soft material with sealing ribs and crack-guiding ribs, and an inner tube made of a hard material that provides stability to the sealing tube. For installation, the sealing tube is positioned vertically and fixed in place before the wall is poured. Swelling elements or swelling strips are also known as sealing elements in the prior art. These elements absorb water and thereby increase in volume. This increase in volume allows a swelling element, for example in construction, to seal structures. A disadvantage is that the watertightness of walls depends heavily on the proper installation of the sealing pipes. Installation errors can allow water to surround the sealing pipe. Furthermore, the two-piece design of the sealing pipes places high demands on the storage of the components on the construction site. The two-piece design also makes handling and fitting the sealing pipes on site labor-intensive. It is therefore an object of the present invention to overcome at least one of the disadvantages described above, at least partially. In particular, it is an object of the invention to provide a sealing tube that is improved compared to the prior art, wherein the sealing tube has particularly good sealing properties and at the same time withstands the requirements of mechanical loads and temperature changes. The foregoing problem is solved by a sealing tube with the features of claim 1 of the first aspect of the invention and by a method for manufacturing a sealing tube with the features of the independent method claim relating to the second aspect of the invention. Further features and details of the invention will become apparent from the dependent claims, the description, and the drawings. Features and details described in connection with the sealing tube according to the invention naturally also apply in connection with the method according to the invention, and vice versa, so that the disclosure relating to the individual aspects of the invention always refers, or can refer, to each other. According to a first aspect of the invention, a sealing tube is provided for sealing controlled crack joints in walls. The sealing tube comprises a base body made of a first material for stabilizing the sealing tube, at least one crack guidance rib made of the first material or a second material, and at least one swelling element for sealing against moisture, wherein the at least one swelling element is arranged on the base body and/or on the crack guidance rib. For the purposes of the invention, sealing controlled crack joints can be understood as preventing fluid, particularly water, from passing through a fractured concrete wall. A wall, especially a concrete wall, is a vertical structure, primarily composed of concrete, and typically serves as a load-bearing or separating structural element in buildings or structures. The sealing tube has a base body. The base body can be understood as the part that provides at least some of the mechanical strength and acts as a support or guide for at least one crack-guiding rib. The base body can be designed as a solid profile or as a hollow profile. Within the scope of the invention, the solid profile can be formed by the star-shaped connection of several crack-guiding ribs. Solid profiles have the advantage of being easier to machine, whereas hollow profiles are lighter and require less material. A first material can be metal, especially light metals such as aluminum or magnesium alloys, or plastic. Metal offers very high stability and resistance to mechanical stresses such as pressure or impact, making it particularly suitable for load-bearing and safety-critical applications. Plastics are generally lighter than metal and offer good chemical resistance, making them ideal for various applications. are situations where weight is a factor and the material is exposed to aggressive chemicals or moisture. Stabilizing the base body can be understood as ensuring that the sealing tube retains its structural integrity, especially in cases where it has to withstand loads such as concrete pressure, weight of overlying structur