CZ29859U1 - Cylindrical float - Google Patents

Abstract

It contains as a carrier element at least one segment comprising a spiral-wound roll of sheet of a polymeric material having bulk density lower than 1000 kg.m^-3. The polymeric material of the sheet (1) is polyolefin foam having bulk density of 10 to 200 kg.m^-3. The sheet (1) has thickness (h) 1 to 40 mm, width (L) 50 mm to 2 m and in the direction of its length is wound spirally into the form of a roll (2) having a diameter (D1) of 50 to 2000 mm and an axial length (L) of 50 mm to 2 m. In the wound state it is fixed by planar welding, gluing or with a system of linear or point welds (7) or glued joints.

Description

Cylindrical float

Field of technology

The technical solution relates to a cylindrical float, which is designed especially for nominal walls used to capture pollution from the surface of the open water surface.

Prior art

Known solutions relating to nominal walls solve this system as a whole (system of float storage, loads, joining, etc.) rather than focusing in more detail on the construction of the float itself. As far as the float is concerned, only the type of material used is mentioned, or the shape that suits the cases (bags) or other attachments (loops) in which the floats are stored.

In the solution according to the international patent application PCT WO2012018722, floats made of expanded polyethylene (PE) with a closed structure in the shape of cylinders with converging cut ends are inserted into the impermeable sleeves. The floats are 6 inches (152 mm) in diameter and two to ten times their length. The float is designed as a compact block of lightweight material. In practice, the float diameter requirement is often different. Larger diameters are required for large retaining walls or walls used in more demanding conditions. Using the currently used production process for extruding expanded PE with a closed cell structure, cylindrical blocks can only be prepared up to a diameter of 300 mm. Also the range of achievable foam bulk densities is relatively narrow and is between 20 and 30 kg / m ³ . Due to diffusion processes, the dimensional stability of the foam floats for 6 months from production is also adversely affected.

U.S. Pat. No. 5,583,0185 also deals primarily with the overall construction of a nominal wall. However, there is also presented a float rolled from a bubble wrap, which is then again placed in a bag made of waterproof material. The bags with inserted floats made of rolled bubble foil are arranged one behind the other and connected in such a way that (together with other parts which are below the surface when used) they form the whole system of the nominal wall. The float rolled up from the bubble foil has a poor cohesion of the layers due to the missing joint (weld) of the individual layers of the roll. The mechanical resistance of the base material of the float, i.e. the bubble wrap, is also low. These incomparably inferior mechanical properties limit the use of a bubble wrap float in demanding applications.

The essence of the technical solution

The float according to the present technical solution comprises, similarly to the solution known, as a support element at least one segment formed by a spirally wound roll of a strip of polymeric material with a bulk density of less than 1000 kg.m ^-3 .

The essence of the technical solution lies in the fact that a lightweight polyolefin with a bulk density of 10 to 200 kg.m ^-3 is banded with a polymeric material. The strip has a thickness of 1 to 40 mm, a width of 50 mm to 2 m. In the direction of its length it is spirally wound into a roll with a diameter of 50 to 2000 mm, axial length 50 mm to 2 m and fixed in the wound state by surface welding, gluing or a system of linear or spot welds or glued joints.

The expanded polymeric web material may preferably be a expanded polyolefin selected from the group consisting of expanded low density polyethylene (LDPE) foam, linear low density polyethylene (LLDPE), high density polyethylene (HDPE) and polypropylene (PP), in all cases with a closed or open cellular structure. This expanded polyolefin may optionally be crosslinked.

The roll may have an axially formed cavity with a diameter of up to 100 mm.

A tube (protector) with an outer diameter of 10 to 100 mm made of a material from the group comprising LDPE, HDPE, PP, aluminum and steel can also be inserted in the roll axis.

Alternatively, a cylindrical core with a diameter of 5 to 100 mm made of a material from the group consisting of expanded LDPE, expanded PP, compact LDPE, HDPE or PP, aluminum or steel can also be used.

-1 CZ 29859 UI

The main benefit of the cylindrical float according to the presented technical solution is the high variability of its dimensions and useful properties with significantly easier manufacturability than that of hitherto known floats with comparable use.

Explanation of the drawing

To further clarify the essence of the technical solution, the attached drawing serves, where Fig. 1 - roll without axial cavity in longitudinal and cross section and in axonometric view, Fig. 2 - roll with admitted cavity in axis, in longitudinal and cross section and in axonometry, Fig. 3 - a roll with a tube (protector) in the axis, in longitudinal and transverse section and in axonometry, Fig. 4 - a roll with a core inserted in the axis, in longitudinal and transverse section and in axonometry.

Examples of technical solution

Example 1

Nome cylindrical float to the walls in the embodiment (see FIG. 1) comprises a carrier element at least one segment formed by spirally coiled roll, which belt 1 2 of expanded foam with closed LLDPE uncrosslinked cellulosic structure with a density of 20 kg.nť ^third The strip 1 has a thickness h of 10 mm, a width L of 1600 mm and is spirally wound in the direction of its length into a roll 2 with a diameter D1 of 300 mm and an axial length L of 1600 mm, without an axial cavity. In the coiled state, it is fixed by surface welding.

Example 2

The cylindrical float for nominal walls in the exemplary embodiment (see Fig. 2) comprises as a support element at least one segment formed by a spirally wound roll 2 of a strip 1 of expanded foamed non-crosslinked PP with a closed cellular structure with a bulk density of 200 kg.m ^-3 . The strip 1 has a thickness h of 1 mm, a width L of 2000 mm and is spirally wound in the direction of its length into a roll 2 with a diameter D1 of 200 mm and an axial length L of 2000 mm, with an admitted axial cavity of diameter D2 of 100 mm. In the coiled state it is fixed by a system of linear welds.

Example 3

The cylindrical float for nominal walls in the exemplary embodiment (see Fig. 3) comprises as a support element at least one segment formed by a spirally wound roll 2 of a strip 1 of expanded foam crosslinked LDPE with a closed cellular structure with a bulk density of 50 kg.m ^-3 . The strip 1 has a thickness h of 40 mm, a width L of 2000 mm and is spirally wound in the direction of its length into a roll 2 with a diameter D1 of 2000 mm and an axial length L of 2000 mm around a HDPE pipe 5 with an outer diameter D4 of 100 mm and an inner diameter D5. 90 mm, placed in the axis of the roll 2. In the coiled position it is fixed by a system of linear welds.

Example 4

The cylindrical float for nominal walls in the exemplary embodiment (see Fig. 4) comprises as a support element at least one segment formed by a spirally wound roll 2 of a strip 1 of expanded foamed non-crosslinked HDPE with an open cellular structure with a bulk density of 40 kg.m ^-3 . The strip 1 has a thickness h of 20 mm, a width L of 1600 mm and is spirally wound in the direction of its length into a roll 2 with a diameter D1 500 mm and an axial length L 1600 mm around a cylindrical core 6 of aluminum with a diameter D3 of 20 mm mounted in the axis rolls 2. In the coiled position it is fixed by surface welding.

Industrial applicability

The cylindrical float according to the presented technical solution is designed primarily for nominal walls used to capture pollution from the surface of the open water surface. However, due to the great variability of its dimensions, it is universally usable as a supporting element for other floating products and equipment.

Claims (6)

CLAIMS FOR PROTECTION A cylindrical float, in particular for nominal walls, comprising as a support element at least one segment formed by a helically wound roll of a strip of polymeric material with a bulk density of less than 1000 kg, characterized in that the polymeric material of the strip (1) is a expanded polyolefin. density of 10 to 200 kg.m ' ³ , the strip (1) has a thickness (h) of 1 to 40 mm, a width (L) of 50 mm to 2 m and is spirally wound in the direction of its length into a roll (2) of diameter ( Dl) 50 to 2000 mm, axial length (L) 50 mm to 2 m and fixed in the coiled state by surface welding, gluing or a system of linear or spot welds (7) or glued joints. Cylindrical float according to claim 1, characterized in that the polymeric material of the strip (1) is a expanded polyolefin selected from the group consisting of expanded low density polyethylene (LDPE) foam, linear low density polyethylene (LLDPE), high density polyethylene (HDPE) and polypropylene (PP). ), in all cases with a closed or open cellular structure. Cylindrical float according to Claim 2, characterized in that the expanded polyolefin of the polymer strip (1) is crosslinked. Cylindrical float according to Claim 1, characterized in that the roll (2) has a cavity (4) with a diameter (D2) of up to 100 mm formed in the axis. Cylindrical float according to Claim 1, characterized in that the roll (2) has an axially inserted tube (5) with an outer diameter (D4) of 10 to 100 mm from a material from the group comprising LDPE, HDPE, PP, aluminum and steel. Cylindrical float according to claim 1, characterized in that the roll (2) has an axially inserted cylindrical core (6) with a diameter (D3) of 5 to 100 mm made of a material from the group comprising expanded LDPE, expanded PP, compact LDPE, HDPE or PP, aluminum and steel.