RU34687U1 - Thermal insulation element - Google Patents

Description

2003113917

MSHMNINSHTS

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Thermal insulation element

The invention relates to mechanical engineering and construction, in particular to thermal insulation of pipelines under conditions of temperature differences between the heat agent and the environment.

Well-known thermal insulation solutions are either not efficient enough or structurally complex and expensive, which prevents widespread use in various sectors of engineering and construction. Optimization of the design solution, material, manufacturability of manufacturing can significantly reduce the cost of manufacturing insulation and reduce heat loss in industry. A known pipe containing an insulated pipe and a heat-insulating cylinder installed with a gap relative to the insulated pipe, while the ends of the insulated pipe are mated on conical surfaces with a common apex located in the center of symmetry of the pipe on its axis. / AU USSR No. 1451425.1989, bull. No. 2 /.

The known solution does not have sufficient heat insulation; its ability is not universal enough and is applicable only when performing conical surfaces of the pipeline in the form of sockets.

A thermally insulated element is known that contains a series of screens of a rigidly formed sheet with external and internal bulges and cushioning material, while the bulges on the screen sheet are made in the form of cells of arbitrary shape formed by longitudinal and transverse partitions. / USSR AS No. 1190139, 1985, bull. No. 41 /

This solution also does not have sufficient heat-insulating ability, it is unnecessarily structurally difficult and not technologically advanced to manufacture.

Closest to the claimed is thermal insulation for contact interaction with the pipe, containing a polymeric foam shell with ribs on the inner surface forming air channels, while the shell is made of elastic foam and its ribs have variable stiffness in height, and the air ducts are made in a spiral closed due to the bending of the elastic edges of the shell when installing it on the pipe. / AC USSR No. 1822922, 1993, No. 23 /.

This solution also does not have sufficient thermal insulation ability, it is unnecessarily structurally difficult and not technologically advanced during installation, because It provides only pulling on the pipe from the free end, which is not technologically advanced and difficult to implement on operating pipelines.

The objective of the technical solution is to increase the insulating ability, manufacturability, reducing the structural complexity of the insulating element.

The problem is solved in that in a heat-insulating element including a foam polymer shell in the form of a tubular half-cylinder with forming external and external surfaces conjugated along the edges by support edges and protrusions of the locking joint, according to the solution, the inner cylindrical surface is made with a depth of 8-14 mm inside the heat-insulating element with the possibility of forming a closed inner cavity with a heat-insulating surface, while the inner cylindrical surface is made paired with one with the supporting edge on the outside surface, and with the other supporting edge, a concave surface, and

the radius of curvature of the surface is made smaller than the radius of the concave surface. Distinctive features are:

- the inner cylindrical surface is made with a deepening inside the insulating element with the possibility of forming a closed inner cavity with a heat-insulating surface.

(which increases thermal insulation properties due to the low thermal conductivity of air in a closed internal cavity);

- the inner cylindrical surface is made with a depth of 8-14 mm, (which is the optimal value to prevent heat loss in pipelines with different diameters);

- the inner cylindrical surface is made conjugate with one supporting edge of the convex surface, and with the other supporting edge of the concave surface (which ensures the manufacturability of the structure);

- the radius of curvature of the convex surface is made smaller than the radius of the concave surface (which ensures the manufacturability of the structure);

Thus, the claimed solution meets the criterion of "novelty. Comparison of the claimed solutions with analogues and other known solutions did not allow to identify in them the features that distinguish the claimed solution from the prototype, which allows us to conclude that the criterion of "inventive step.

The technical solution is illustrated by drawings, where figure 1 shows a cross section of a heat-insulating element, and figure 2, 3 enlarged fragments of convex and concave surfaces. The heat-insulating element contains foamed polymeric shell 1, with forming external 2 and internal 3 surfaces, supporting edges 4

 protrusions 5 of the castle connection, a closed inner cavity 6, a convex surface 7, a concave surface 8. The heat-insulating element operates as follows. In the working position, the shells of the foam shell 1, for example, of polyurethane foam, are installed on the pipeline at the supporting edges 4 with the position fixed along the protrusions 5 of the lock connection. In this case, in each half of the heat-insulating element, a closed internal cavity 6 is formed, preventing the heat transfer, which significantly increases the heat-insulating ability of the device. The depth (thickness) of the closed inner cavity 6 is in the range of 8-14 mm. It is optimal for a heat-insulating element in terms of heat-insulating properties and structural strength, because during deformation, for example, as a result of the action of a person’s foot from a load, the foam polymer shell bends within the limits of elastic deformation and again takes its initial position after unloading. Thus, an 8-16 mm gap most effectively prevents both heat transfer and physical destruction of the element. The presence of a convex surface 7 and a concave surface 8 ensures the absence of stress concentrators during elastic deformation of the walls of the heat-insulating element and at the same time is a sufficient structural sign to increase the manufacturability of the manufacture of the heat-insulating element, for example, when removing the latter from the mold.

The heat-insulating element provides an increase in the heat-insulating ability, manufacturability of production, reduction in constructive complexity, and reliability in operation.

Claims (4)

1. The heat-insulating element, including a foam polymer shell in the form of a tubular half-cylinder with forming external and internal surfaces, mating along the edges of the support edges and protrusions of the castle connection, characterized in that the inner cylindrical surface is made with a recess inward of the heat-insulating element with the possibility of forming a closed inner cavity with heat insulating surface. 2. The heat-insulating element according to claim 1, characterized in that the inner cylindrical surface is made with a depth of 8-14 mm 3. The heat-insulating element according to claim 1, characterized in that the inner cylindrical surface is made of a convex surface conjugated with one supporting edge, and a concave surface with the other supporting edge. 4. The heat-insulating element according to claim 3, characterized in that the radius of curvature of the convex surface is made smaller than the radius of the concave surface.