RU198120U1 - LAMEEL HEAT INSULATION PRODUCT, INTENDED FOR FORMATION OF THE HEAT INSULATION AND PROTECTIVE SHELL AROUND THE PIPELINE - Google Patents

Abstract

The technical solution relates to the field of power engineering, namely to devices serving for thermal insulation of pipelines. The technical result is to increase the reliability of the product. The lamellar heat-insulating product consists of a base made of a flexible metal sheet, rectangular in plan, on one side of which a heat-insulating lamellar layer is formed that is inseparably connected to the metal sheet. 9 s.p. f-ly, 4 ill.

Description

The technical solution relates to the field of power engineering, namely to devices serving for thermal insulation of pipelines. The technical solution relates to products of the "finished form", manufactured at the enterprise and can be used for insulation of pipes of large diameters, preferably, and does not require cutting at the installation site under the diameter of the pipe.

In the prior art, a roll-up protective casing of a pipe thermal insulation consisting of a sheet cylindrical shell, which can be made including metal, with stiffeners and devices for fixing it to thermal insulation, the fins being longitudinal on the inner surface of the shell and along the free edges, is known the ribs are installed connecting them with each other flexible connections (RU 15215 U1, F16L 59/00, 09/27/2000).

Known thermal insulation with a shell, which is a thermal insulation made of heat-insulating material and having longitudinal slots extending from the surface facing the pipeline, and partially dividing the insulation into sectors, as well as the shell. The shell is connected with thermal insulation, and at the ends of the shell protrusions and troughs are made to accommodate the corresponding protrusion or trough of an adjacent element with mating parts, also protrusions and troughs can be made on the ends of the thermal insulation to accommodate the corresponding protrusion or trough of an adjacent element with mating parts and on the sides of the shell there are elements for fastening (RU 123491 U1, F16L 59/00, 02.17.2012).

A heat-insulating module for pipes containing a composite heat-insulating shell with a protective cover layer and edges forming longitudinal and transverse thermal locking joints of the protrusion-cavity type, characterized in that it is made in the form of a transformable plate with a heat-insulating layer of extruded polystyrene foam and a protective coating layer of polymer cement with a reinforcing mesh, and longitudinal V-shaped notches are made in the heat-insulating layer of the plate, allowing the plate to be bent so that the plate can be completely wrapped around the insulated pipe, the radial arrangement of the notches and the formation of a cylindrical shell that can be closed by means of a longitudinal thermal lock connection and fixed to the pipe using polymer or metal tape (RU 111242 U1, F16L 59/02, 12/10/2011).

A longitudinal sandwich element is known comprising a core of mineral wool lamellas fastened together by a binder and joined by lateral sides and elongated in the longitudinal direction of the sandwich element, wherein the core has two front surfaces substantially parallel to each other and two end surfaces substantially perpendicular to the front surfaces and parallel to each other, and two side surfaces connecting the front surfaces and end surfaces, where the mineral wool fibers are predominantly perpendicular to the front surfaces, at least one sheet is attached to at least one of the front surfaces of the core, and each of the side surfaces provided with one or more lateral mineral wool slats bonded to the extreme lamellas of the core with a binder, at least one of the side surfaces of at least one side lamella is formed into a profiled section configured to strains with a profiled section of at least one side lamella of an adjacent sandwich element, each side lamella having a variable density, and the profiled section formed by that portion of the side lamella that has a higher density, to prevent cracking and changing the shape of the profiled sections during their manufacture and the formation of thermal bridges in the area of mating profiles of adjacent sandwich elements during the operation of structures of their sandwich elements, and the lamellas in the core have an almost uniform density (EA 014260 B1, E04D 3/35, 2010.10.29).

A device for thermal insulation of pipelines comprising pre-bent metal sheets joined together by locking elements covering a heat-insulating layer adjacent to a pipe (WO 2016195539 A1, F17D 5/04, 12/08/2016).

A heat-insulating structure for a pipeline is known, including a pipeline with thermal insulation in the form of two covering pipelines connected to each other and located one above the other half-cylinders, the inner surface of the half-cylinders is made of a coating of sheet material, for example, metal foil, or fiberglass, or fiberglass, attached to it a heat-insulating layer of fibrous or non-woven material, and the outer surface of the half-cylinders is made only with a coating of sheet material. The attached heat-insulating layer can be made of mineral wool, or glass wool, or basalt lamellas of vertical lamination. The outer surface of the semi-cylinders can be coated with 6 metal foil or fiberglass, or fiberglass, or a polymer-mineral coating reinforced with fiberglass or coated with galvanized steel (BY 2297 U, F16L 59/00 2005.12.30).

A heat-insulating product is known, the inner surface of which is formed by alternating protrusions and depressions, which consists of a layer of fibrous heat-insulating material or includes a layer of fibrous heat-insulating material, which has an inner surface intended to adjoin a thermally insulated surface, and an outer surface, the inner surface being formed by alternating protrusions and depressions that are inclined to the outer surface of the layer of insulating material (RU 139481 U1, F16L 59/14, 04/20/2014).

The closest analogue to the claimed technical solution is a lamella mat, which is a heat-insulating product in the form of a mat made of fibrous materials in which the general orientation of the fibers is perpendicular to the main surfaces of the product. The lamella mat is formed from strips (lamellas) of stone wool glued to a substrate of aluminum reinforced foil (see, for example, clause 3.1.4 of GOST 32313-2011, 01.10. 2015.) A disadvantage of the known lamellar mat is the need for an additional protective layer, since the mat has a foil base, which does not have sufficient mechanical strength and does not provide protection against mechanical stress during installation and operation. In addition, the lamellar mat is supplied to the consumer in rolls, and therefore occupies a significant amount during storage and transportation in comparison with flat heat-insulating products and requires cutting at the facility in accordance with the dimensions of the insulated pipes and the installation of thermal locks. The problem the technical solution is aimed at is the possibility of creating a flat heat-insulating product with increased strength of the outer protective layer.

The technical result is to increase the strength and reliability of the shell formed from the product around the pipeline.

The technical result is achieved due to the fact that the lamellar heat-insulating product consists of a base made of a rectangular in plan flexible metal sheet, on one side of which a heat-insulating lamellar layer is formed, inextricably connected to the metal sheet.

The metal sheet is an extended metal sheet or metal sheet, while the lamellas are oblong and oriented across the metal sheet.

The lamella layer consists of lamellas, which are oblong tetrahedral elements or bars, which are preferably made of fibrous heat-insulating material with a predominant orientation of the fibers perpendicular to the metal sheet.

The lamellas are made of pliable crushable and / or elastic heat-insulating material, preferably mineral wool, have a rectangular cross-section, while the lamellas on the metal sheet are closely adjacent to each other, and the lamella formed by the lamellas is inseparably connected to the metal sheet by means of a continuous adhesive connection as a connecting layer.

The metal flexible sheet is a galvanized steel or tin sheet, the thickness of which can be from 0.2 to 1.0 mm. and preferably is 0.22-0.55 mm, either an aluminum sheet or an aluminum alloy sheet, the thickness of which may be from 0.25 to 1.0 mm. and preferably is 0.3-0.5 mm.

The lamellar layer is located with a transverse and / or longitudinal displacement relative to the metal sheet to enable the formation of overlaps and / or thermal locks.

The lamellar layer has a smaller width and length compared with the width of the metal sheet, with one longitudinal side of the lamellar layer located along the longitudinal edge of the metal sheet, and the other side of the longitudinal side of the lamellar layer is offset from the opposite longitudinal edge of the metal sheet, and the lamellar layer is offset in the longitudinal direction so that from one edge of the transverse side extends the protrusion of the lamellar layer located outside the flexible metal sheet, and on the other transverse side there is an offset of the lamella mat from the edge of the sheet.

On the protrusion of the lamellar layer there is a bevel or narrowing, expanding from the upper edge of the lamellar layer towards the lower edge, while on the other hand there is a bevel or narrowing, expanding from the lower edge of the lamellar layer to its upper edge.

Through the displacements of the lamellar layer in the part of the sheet not covered with lamellas, through holes for mounting fasteners, for example, screws or rivets, are made along the edge of the transverse and / or longitudinal side of the metal sheet.

The lamellar heat-insulating product can be additionally equipped with water-resistant gaskets in the form of strips of elastic polymer material glued at the places of displacement of the lamellar layer in the part of the sheet not covered with lamellas, along the edge of the transverse and / or longitudinal side of the metal sheet.

The device is illustrated by drawings.

In FIG. 1 shows a device (isometric view)

In FIG. 2 shows a device mounted on a pipe (cross section)

In FIG. 3 shows several devices mounted on a pipe (longitudinal section)

In FIG. 4 shows a device with watertight gaskets along the edges of the sheet (isometric view)

Lamellar heat-insulating product, consists of a base made of rectangular in plan flexible metal sheet 1, on one side of which a heat-insulating lamellar layer 2 is formed, which is integrally connected to the metal sheet 1.

The metal sheet 1 is an extended metal sheet or metal sheet, while the lamellas are oblong and oriented across the metal sheet.

Under the extended sheet in the context of the description refers to a longitudinally oriented sheet whose length L exceeds its width B (Fig. 1).

The lamella layer 2 consists of lamellas 3, which are oblong tetrahedral elements or bars, which are preferably made of fibrous heat-insulating material with a predominant orientation of the fibers perpendicular to the metal sheet.

The lamellas are made of pliable crumpled and / or resiliently heat-insulating material, preferably mineral wool, have a rectangular cross-section, while the lamellas on the metal sheet are closely adjacent to each other, and the lamella formed by the lamellas is inseparably connected to the metal sheet by means of a continuous adhesive connection as a connecting layer.

The general orientation of the fibers in the lamellar heat-insulating layer is perpendicular to the surface of the metal sheet.

Glue connection can be discrete (point), or intermittent - separate for each lamella 3.

However, it is preferable that the adhesive joint is solid, in the form of a flexible layer (not shown conventionally in the drawings) of a polymerized adhesive located between the metal sheet 1 and the lamellar layer 2, for example, of rubber-based adhesive.

The metal flexible sheet 1 has sufficient rigidity, allowing it, unlike the foil, to maintain its shape until the start of the installation process and not to undergo irreversible deformation under the influence of its own weight and / or the weight of the lamellar layer 2 during manufacturing and / or transportation.

A flexible sheet in the context of this description refers to a metal sheet that can be resiliently (without kinks) together with the lamellar layer 2 bent into a heat-insulating protective curvilinear shell 4 covering the pipe section 5 by the force of one or more installers.

The metal flexible sheet 1 may be a galvanized steel or tin sheet, the thickness of which may be from 0.2 to 1.0 mm and preferably 0.22-0.55 mm.

The metal flexible sheet 1 may be an aluminum sheet or an aluminum alloy sheet, the thickness of which may be from 0.25 to 1.0 mm and preferably 0.3-0.5 mm.

So for diameters D≤159-426 mm, the thickness of the metal sheet 1 will be δ _met = 0.20-0.55 mm.

For diameters D> 426 mm, the thickness of the metal sheet 1 will be δ _met = 0.25-1.0 mm.

The thickness of the aluminum sheet δ _al = 0.25-1.0 mm., And preferably is δ _al = 0.3-0.5 mm.

It should be noted that the thickness of the metal sheet 1 exceeds the limit thickness established for the 0.05 to 0.10 mm foil (GOST 2208-2007).

The lamellar layer 2 is located with transverse and longitudinal displacements relative to the metal sheet 1 to allow overlaps 6 and 7 and thermal locks 8, 9 to be formed between the transverse sides of the bent flexible metal sheet and adjacent products after mounting the products on the pipe 5. It is preferable that the lamellar layer 2 has a smaller width and length compared with the width B and the long L (Fig. 1) of the metal sheet 1, while one longitudinal side of the lamellar layer 2 is located along the longitudinal edge 10 of the metal sheet 1 with the formation of a ledge 11, and the other longitudinal side of the lamellar layer 2 is located with an offset (indent) from the opposite longitudinal edge 12 of the sheet, with the formation of the reciprocal step 13.

In this case, the lamellar layer 2 is shifted in the longitudinal direction relative to the metal sheet 1 so that from one edge of the transverse side of the metal sheet 1, the protrusion 14 of the lamellar layer 2 extends beyond the metal sheet 1, and on the other transverse side there is an offset (indent) of the lamellar layer 2 from the edge of the metal sheet 1.

The protrusion 14 of the lamellar layer for the formation of thermal lock 8 is made with a bevel or narrowing, expanding from the upper edge of the lamellar layer 2 towards its lower edge, while on the other hand there is a reciprocal bevel 15 or narrowing, expanding from the lower edge of the lamellar layer 2 to its upper to the edge.

The lamella layer 2 is inseparably connected to the metal sheet 1 by means of discrete adhesive joints, or by a continuous adhesive joint in the form of a connecting layer (not shown conventionally in the drawings).

Through the displacements of the lamellar layer 2 in parts of the metal sheet 1 free from the lamellar layer 2 and not covered with lamellas 3, through holes 16 are made along the edges of the transverse and longitudinal sides of the metal sheet 1 for mounting fasteners 17, for example, screws or rivets.

The device is made as follows. Roll out a metal sheet (metal sheet) from a roll, cut to the desired size and straighten. Openings 16 for fasteners 17 are made along the edges of the metal sheet. A lamella mat or plate with a general longitudinal orientation of the fibers is cut into lamellas 3. If necessary, cuts are formed to form ledges 11 and 13 of the lamellar layer, and bevels are formed on two lamellas to form the elements 14 and 15. Next, a continuous adhesive layer (not shown in the drawings) is applied to a part of the sheet, on which the lamellas 3 are laid close to each other, orienting them perpendicularly to the surface of the metal sheet 1, which is necessary to prevent shrinkage of the lamellar layer during operation of the product. Moreover, the lamellar layer 2 is formed with longitudinal and transverse displacement relative to the edges of the metal sheet. After the formation of the lamellar layer, the adhesive layer is cured. If necessary, waterproof sheets in the form of strips 18 and 19 (Fig. 4) of elastic polymer material are glued onto a metal sheet.

The device is mounted on the pipe 5 as follows. They start the product under the pipe 5 transversely to its longitudinal axis and begin to bend it, covering the pipe 5 at the same time from two sides.

Next, the protrusion 14 and the bevel 15 of the lamellar layer 2 are closed to form a heat lock 8, a part of the sheet free from the lamellar mat 2 is applied to the outer surface of the bent metal sheet 1, with the formation of an overlap 6 (Fig. 2), and fixed with fasteners 17, forming around the pipe 5 is a closed protective-insulating sheath. In the absence of water-proof gaskets, before fixing the overlap 6, the inner side of the flexible metal sheet 1 is lubricated with a sealing compound.

Next, close to the formed protective thermal insulation shell for the formation of a thermal lock 9 (Fig. 3), the next product is docked and mounted, wrapping it around the pipe and around the previous mounted shell with the formation of an overlap 7.

The lamellas 3 forming the lamellar layer 2 are made of crumpled heat-insulating material, preferably of fibrous insulation, for example, mineral wool.

The general orientation of the fibers in the lamellar heat-insulating layer is perpendicular to the surface of the metal sheet, the lamellas have a rectangular cross-section and are extended (i.e., their length exceeds two other sizes). In this case, the lamellas 2 on the metal sheet 1 are located close to each other.

In the process of formation of a protective and heat-insulating shell around the pipe 5 (Fig. 3), the lamellas 3 are deformed, are elastically adjacent to each other and to the pipe 5, which eliminates the formation of cold bridges between them and heat leaks. The use of fibrous insulation is preferable, since in this case the fibers of adjacent lamellas interact with each other. However, it is also possible to make a polymer foam material having a sufficient degree of creasing and / or elasticity. Moreover, due to the use of a metal sheet and fasteners (self-tapping screws), it is possible to create a significant compression force, which cannot be achieved with conventional lamellar mats, since the lamellar protective layer made of thin laminated foil cannot be fixed without tearing with fasteners, while other methods of fixing the edges of the lamella mats with the creation of compressive forces are possible but not practical. Thus, the described product also provides better thermal insulation compared to known lamellar mats. The product is made as follows. On a prefabricated or formed from a roll rectangular metal sheet 1, a continuous adhesive layer, for example, rubber glue, is applied. Lamellas 3 are laid close to each other across the metal sheet 1, forming a lamella layer 2. For better adhesion, a uniformly distributed load can be placed on the lamellas, and to accelerate the polymerization of the adhesive layer, the workpiece can be placed in the brake chamber. Before gluing the lamellas 3 to the metal sheet, for the formation of thermal locks at the ends of each lamella 3, steps 13 are made, while the extreme lamellas are made with bevels.

The described technical solution can be made without the use of sophisticated equipment, which reduces labor costs.

Compared with lamella mats, the technical solution provides the convenience of storage and transportation due to the flat shape of the products, which allows you to store and transport them in piles, in contrast to the known lamella mats, which are rolled up.

Claims (10)

1. Thermal insulation product, characterized in that it consists of a base made of a rectangular in plan flexible metal sheet, on one side of which a heat-insulating lamellar layer is formed, and the lamellar layer consists of lamellas, which are oblong tetrahedral elements or bars, while the lamellas on the metal sheet are located close to each other, and the lamellar layer formed by the lamellas is inseparably connected to the metal sheet. 2. Lamella heat-insulating product according to claim 1, characterized in that the metal sheet is an extended metal sheet or metal sheet, while the lamellas are oblong and oriented across the metal sheet. 3. Lamella heat-insulating product according to claim 1, characterized in that the lamella layer consists of lamellas, which are oblong tetrahedral elements or bars, which are preferably made of fibrous heat-insulating material with a predominant orientation of the fibers perpendicular to the metal sheet. 4. Lamellar heat-insulating product according to claim 3, characterized in that the lamellas are made of flexible crushable and / or elastic heat-insulating material, preferably mineral wool, have a rectangular cross-section, while the lamellas on a metal sheet are closely adjacent to each other, and the lamellar layer formed by the lamellas is inseparably connected to the metal sheet by means of a continuous adhesive joint in the form of a connecting layer. 5. Lamella heat-insulating product according to claim 1, characterized in that the metal flexible sheet is a galvanized steel or tin sheet, the thickness of which can be from 0.2 to 1.0 mm and, preferably, is 0.22-0.55 mm, or an aluminum sheet or a sheet of aluminum alloy, the thickness of which may be from 0.25 to 1.0 mm and preferably 0.3-0.5 mm. 6. Lamella heat-insulating product according to claim 1, characterized in that the lamellar layer is located with a transverse and / or longitudinal displacement relative to the metal sheet to enable overlapping and / or thermal locks. 7. Lamella heat-insulating product according to claim 1, characterized in that the lamellar layer has a smaller width and length compared to the width of the metal sheet, while one longitudinal side of the lamellar layer is located along the longitudinal edge of the metal sheet, and the other side, the longitudinal side of the lamellar layer , is located offset from the opposite longitudinal edge of the metal sheet, and the lamellar layer is offset in the longitudinal direction so that from one edge of the transverse side extends the protrusion of the lamellar layer located outside the flexible metal sheet, and on the other transverse side there is an offset of the lamella mat from the edge sheet. 8. The lamellar heat-insulating product according to claim 6, characterized in that the protrusion of the lamellar layer has a bevel or narrowing expanding from the upper edge of the lamellar layer toward the lower edge, while on the other hand there is a bevel or narrowing expanding from the lower edge of the lamellar layer to its top edge. 9. Lamellar heat-insulating product according to claim 5, characterized in that through the holes for mounting fasteners, for example, screws or rivets, at the displacements of the lamellar layer in the part of the sheet not covered with lamellas, along the edge of the transverse and / or longitudinal side of the metal sheet 10. Lamellar heat-insulating product according to claim 1, characterized in that it is additionally equipped with water-resistant gaskets in the form of strips of elastic polymer material glued at the places of displacement of the lamellar layer in the part of the sheet not covered with lamellas, along the edge of the transverse and / or longitudinal side of the metal sheet .

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