RU2728560C1 - Unified metal thermal insulation (umti) - Google Patents

Abstract

FIELD: heat insulation.

SUBSTANCE: invention relates to devices for heat insulation of pipelines and cylindrical vessels. Unified metal thermal insulation (UMTI) is made of modules which are docked to each other. At that, each annular heat-insulating assembly UMTI for one radius of insulated equipment consists of identical modules containing a set of coaxial metal membranes with side facets located under external angle Y to plane of membrane, and having unified rectangular (square) metal spiral frames. Various types of thermal insulation blocks of heat insulation are replaced with unified symmetric modules – one type per each radius of insulated equipment. Heat-insulating material of glass fiber or basalt filler is replaced with metal stainless membranes. For mutual detachable connection of modules to each other, annular tension lever locks are used, providing guaranteed reliable contact of side faces of modules during their operation and at occurrence of thermal vibrations, as well as unimpeded mounting and dismounting of adjacent assemblies of modules.

EFFECT: heat insulating assemblies can significantly save weight of stainless steel of thermal insulation, unify thermal insulation, increase operational reliability of heat-insulating modules, due to unification considerably reduce manufacturing cost.

1 cl, 18 dwg

Description

The invention relates to thermal insulation technology, and more specifically to structures for thermal insulation of pipelines and cylindrical vessels. OKB "GIDROPRESS", PJSC "ZiO-Podolsk" (Podolsk, Moscow region) in cooperation with the German company "KAEFER" have developed and implemented a removable block thermal insulation (BSTI) for the units of the Tianwan NPP (China) and for the units of the Kudankulam NPP (India).

However, the relatively thick-walled steel of the BSTI box (1.0 mm and 0.5 mm). due to its strength characteristics due to the large size of the blocks and the fastening on their surface of a large number of tight tension locks, leads to non-optimal consumption of stainless steel and heat-insulating material.

Known block removable thermal insulation containing placed on the outer surface of the heat-insulated equipment sequentially in its longitudinal direction and close to each other annular sections, each of which is made of N identical heat-insulating blocks, which are joined together by side

относительно друг друга, тепло изоляционные блоки в смежных секциях расположены напротив друг друга, каркас включает четыре одинаковые угловые стойки, которые попарно соединены между собой параллельно расположенными поперечными элементами, (см.патент RU №2493473, 2013 г, номер китайского патента этой же российской заявки: ZL 201380015488.9 - дата публикации сведений о выдаче патента 14.12.2016 г.). Данный патент взят за прототип.angled walls

relative to each other, heat insulating blocks in adjacent sections are located opposite each other, the frame includes four identical corner posts, which are connected in pairs by parallel transverse elements, (see patent RU No. 2493473, 2013, Chinese patent number of the same Russian application : ZL 201380015488.9 - date of publication of information on the grant of a patent on December 14, 2016). This patent is taken as a prototype.

The disadvantage is that the patent does not provide for the creation of a specific unified metal thermal insulation of cylindrical surfaces, which currently exists on pipelines and heat exchange equipment of modern nuclear power plants (NPP). Different types of heat-insulating blocks made using fiberglass or basalt filler as heat-insulating material do not have specific unification for each radius of heat-insulated equipment. When the shell of the heat-insulating blocks breaks, the overlap (clogging) of the drainage and radioactive waste ladders with fiberglass occurs. Cross-shaped latches, fastening thermal insulation blocks are difficult to manufacture. The use of a large number of trapezoidal prismatic blocks as heat-insulating blocks is not economically feasible.

The purpose of the proposed invention is: creation of a unified metal thermal insulation (UMTI) with the unification of its components and a minimum amount of welding; replacement of structurally complex locks fastening heat-insulating blocks with simpler ones that do not create bending moments and are more durable,

The problem is solved by the fact that when creating a unified heat-insulating module (UTM) from metal membranes, the unification of its components is performed. The cruciform latches, which are complex in design and manufacture, have been replaced by simpler and more durable ring lever-type tension locks. A large number of trapezoidal prismatic heat-insulating blocks were replaced with unified heat-insulating modules, one for each radius of the heat-insulated surface. Conventionally, no more than 9 main radii of the surfaces of the first circuit of modern nuclear power plants (NPP) can be distinguished: the Russian Federation, China, India, Iran, Turkey, etc., on which a removable block thermal insulation (BSTI) is mounted, numbering more than 2000 geometric varieties of thermal insulation blocks.

(градусов) относительно друг друга.UMTI contains annular sections placed on the outer surface of the heat-insulated equipment in series in its longitudinal direction and docked close to each other, each of which is made of n identical modules, which are docked with each other by side walls located at an angle

(degrees) relative to each other.

UMTI, for each radius of the heat-insulated cylindrical surface of the NPP, is made of geometrically identical unified heat-insulating modules, each of which consists of an upper cylindrical cover, a lower cylindrical bottom, two flat side faces, two end ring sectors and a set of circular cylindrical metal membranes with unified rectangular flexible metal spiral frames (MSH) made of a metal tape with a thickness of {0.2-0.7} mm by winding it at an angle Z {1-89} degrees on the corresponding mandrel, and located inside the module, with the dimensions of the module:

где:

Where:

"H" - module height, "C" - arc length of the outer surface of the module cover, "c" - arc length of the outer surface of the module bottom, "R" - radius of the outer surface of the module cover, "r" - radius of the outer surface of the module bottom, " n "- the number of modules placed on the surface of the perimeter 2πr, Q - the angle of coverage between the two side inclined faces of the module; inside the module there are metal membranes, with a thickness of {0.05-0.2} mm, the shape of cylindrical coaxial surfaces with two opposite inclined faces with a height of {3-30} mm, bent at an angle Y to each other, the angle Y coincides with the Q - angle covering the sides of the module, spacing and fixing the membranes inside the module along the ends, on intermediate power partitions located along the length of the module with a design interval, and with the module cover, are made with inclined edges, the cylindrical surface of the membranes and MSH using contact welding. The use of flexible MSH as strong spacer elements of cylindrical membranes provides additional unification, since having the same geometric dimensions in height and width and a free size along the length without complicated modifications (trimming and processing the SMH to the required size), it allows unification of the structural assembly of the UTM inside.

The surfaces of the membranes form membrane chambers filled with air that penetrates into adjacent membrane chambers through calibrated membrane openings located on opposite sides of the upper and lower planes of the membranes that form each chamber, air penetrates at higher pressure inside the cold membrane chamber into a chamber with hotter air, which has less pressure. The dimensions of the membranes increase in proportion to the lengths of the arcs of each subsequent row by the value:

где:

Where:

ΔL - increase in the arc length of the membrane surface of the next row;

Δρ is the linear distance from the surface of the previous row of the membrane to the surface of the membrane of the next row;

L is the arc length of the membrane surface of the previous row;

Y is the angle of coverage between the inclined side faces of the membrane.

On the bent sections of pipelines, the UMTI is made in the form of unified rotary heat-insulating modules covering the heat-insulated surface of the bent section of the pipeline, the membranes and ISM are made coaxial with the center of the pipeline radius and additionally coaxial with the center of the pipeline bend radius; in the areas where the nozzle adjoins the surface of the pipeline or heat exchanger, the MTI is made with the installation of the initial insulation of a cylindrical surface of a larger diameter, followed by insulation of the surface and additionally curved MSH, an adjoining nozzle, made according to the templates of the lines of intersection of the abutting surfaces of two cylinders

The UMTI modules are interconnected by means of annular lever tension locks, which connect four adjacent blocks through supports, each support is made in the form of a separate sector of the fourth part of the lateral cylindrical surface connected to radial faces fixed on the surface of the gussets of the covers of the abutting corners, so that the faces of the supports are located as a continuation of the faces of the modules, and the four sectors of the lateral cylindrical surface, when they are connected, form a single cylindrical surface of height h, on the outer surface of which there are holes for the entry of cold air and an annular tension lever lock with spacer bars providing free access of air to the holes , while the lever of the tension lock moves in a plane perpendicular to the common axis of symmetry of the abutting faces of the modules (conventional name: horizontal lever tension locks).

The top cover, bottom bottom and membranes can be made in the form of an elliptical, spherical or other curved surface, or combined, fastened together by MSH and resistance welding.

The movement of the levers of the tension locks in the plane perpendicular to the common axis of symmetry of the abutting faces of the modules gives an advantage over the locks, the levers of which perform working movements in the plane parallel to the common axis of the abutting faces of the modules (example: thermal insulation BSTI), since in the latter case additional space is required with a height of at least 100 mm, which at the installation of equipment due to overlapping tolerances is a zone of a large number of collisions due to the priority of the layout of equipment and pipelines installed in the nearby space.

In the areas where the branch pipe adjoins the surface of the pipeline or heat exchanger, the UMTI is made with the installation of the initial insulation of the cylindrical surface of a larger diameter, followed by the insulation of the surface and additionally curved MSH of the adjoining pipe, made in accordance with the descriptive geometry according to the templates of the intersection lines of the mating surfaces of two cylinders. First, a cylindrical surface of a larger diameter is isolated, for which purpose in the membranes of each of the two abutting adjacent modules, membranes are sampled with the radius of the surface of the adjacent branch pipe. For the same purpose, additional local bending of the ISS is performed along the radius of the surface of the adjoining branch pipe. The connection of the metal membranes to the MSS is made in a similar way to the conventional end version. For the final docking of the UMTI branch pipe with the pipeline insulation surface, the abutting end of the UMTI branch pipe is being finalized, after having undergone additional bending of the UMTI branch pipe end according to the templates of the lines of intersection of the UMTI surfaces of two cylinders: the pipeline and the branch pipe. When assembling two insulations of a pipeline or a heat exchanger with a branch pipe, we obtain a tight connection of two thermal insulations of different diameters.

The use of UMTI, in case of damage to the module, makes it possible to simply replace the damaged modules from the availability of a spare number of modules, followed by simple repair of the damaged modules.

Thus, the patented unified metallic thermal insulation (UMTI) has the following differences from the prototype:

1. Different types of heat-insulating blocks were replaced with unified metal heat-insulating modules, just one type of module for each of the nine main radii of the insulated NPP equipment.

2. Thermal insulation material made of fiberglass or basalt filler was replaced with metal membranes. In the event of a rupture of the shell of heat-insulating modules, overlapping (clogging) of sewage and radioactive waste drains is excluded

3. Thermal insulation made of UMTI is lighter (by 22%), compared to the currently used thermal insulation of BSTI at the Tianwan NPP and Kudankulam NPP. UMTI modules, as thin-walled and axially symmetric coaxial shells, have a low metal consumption and the most favorable physical properties for breaking and compression, uniformly distributed forces of bending moments and temperature fields along the perimeter and length of the heat-insulated surface.

4. Due to the symmetry and accuracy of manufacturing unified symmetric modules, the opening of thermal gaps between the side faces of the heat-insulating blocks is excluded.

5. The use of a metal spiral frame as a unified, affordable and easy-to-install element gives a significant gain in the cost and production time of thermal insulation.

6. Placement of circular lever tension locks in the corners on the outer surface of the intersection of the outer surfaces of the UMTI completely excludes numerous local marking, fitting and welding works when installing thermal insulation at the facility. The use of horizontal lever tension locks saves an additional 100 mm of priority space around the equipment, which is a zone of increased collisions during installation due to overlapping tolerance fields of the equipment being mounted.

7. Simplification of the design of tension locks, reduction of the weight of each lock and their number.

8. Additional increase in the composition of the thermal insulation of the radiation protection material (UMTI metal membranes) from gamma radiation on the equipment and pipelines of the reactor compartment without increasing the total weight of the insulation.

9. Simplification of refurbishment of UMTI heat-insulating modules during their installation at NPPs by simply replacing UMTI modules from the spare.

For an arbitrary mass of air M located in the volume of the chamber between adjacent hermetic membranes, the molar mass of which is m, the Cliperon - Mendeleev equation has the form:

где:

Where:

P - pressure kg / cm ² , V - volume in cm ³ , M - air mass in g, m - molar mass in g / mol, R - Universal gas constant = 8.314 J / mol ° K, T - absolute temperature in ΔK (2).

1. Clayperon's equation / Physical encyclopedia (in 5 volumes). Ch. ed. A.M. Prokhorov - Sov. Encyclopedia, 1990 - T. 2, p. 371-704. ISBN 5-85270-061-4 /.

но

- это плотность газа ρ г/см³, таким образом:

but

is the gas density ρ g / cm ³ , thus:

If the air densities at pressure P ₁ and P ₂ are equal to ρ ₁ and ρ ₂ , respectively, then at the same gas temperature T, we can write P ₁ / P ₂ = ρ ₁ / ρ ₂ . This important result is also a direct expression of Boyle's law.

Density of air depending on the temperature decreases with increasing of the latter, for example, from 1,293 kg / m ^3, at 0 ° C to 0,615 kg / m ³ at 300 ° C (2).

2. Bogdanov S.N., Burtsev S.I., Kupriyanova A.V. Refrigeration equipment. Air conditioning. Properties of substances: Ref. / ed. S.N. Bogdanov. 4th ed., Revised and enlarged - SPb: SPB GAKhPT, 1999, - 320 p. /

Therefore, in two communicating membrane chambers at the same temperature, the air pressure will be higher, where the coldest air is and where its density is higher. Cold air will flow into the chamber with hotter air, and cooled warm air will flow into the chamber with colder air, that is, there will be a "reverse natural circulation" of cold air. In this case, equality will be observed:

P ₁ = P ₂ + ΔP, where:

P ₁ - air pressure in the cold chamber;

Р ₂ - air pressure in the hot chamber;

ΔР is the pressure loss from the hydraulic resistance of the calibrated holes in the membrane separating the cold and the adjacent hotter membrane chambers plus turns and air movement inside the chamber, including the pressure loss in the ISC of the partitions.

A cascade of metal membranes shields the outer surface of the UMTI from radiant heat transfer, and the air locked by the hydraulic resistance DR with a constant replenishment of colder air is a good insulator against thermal conductivity.

A cascade of metal membrane edges passes colder air to the heated surface, that is, convective heat exchange occurs in each membrane chamber with the movement of cold air to the adjacent hot chamber and cooling the hot air in this chamber. Such a construction of thermal insulation made of heat-insulating modules, including a cascade of metal membranes, is "transparent" for cold atmospheric air and closed for direct reverse flow of hot air.

FIG. 1 shows a view of a thermal insulation module.

FIG. 2 shows a section of the module and its connection to a heat insulated surface.

FIG. 3 shows the assembly of the ISSH with a cover, bottom and sides of the module.

FIG. 4 shows a metal membrane.

FIG. 5 shows a fragment of obtaining a tape spiral for the ISS.

FIG. 6, shows the connection of the MSH with the membrane by means of resistance welding.

FIG. 7 shows the assembly of the membrane with the ISS in working condition.

FIG. 8 shows an isometric view of the ISS in a bent position.

FIG. 9 shows the assembly of membranes from the ISS into a power partition.

FIG. 10 shows power baffles assembled with a heat insulated surface and a module cover.

FIG. 11 shows a fragment of the connection of metal membranes with the MSH with the end face of the module using resistance welding

FIG. 12 depicts the support of the annular lever-type tension lock and the arrows show the path of cold air passage to the membrane chambers.

FIG. 13 shows an annular lever tension lock and UTM fastening to each other.

FIG. 14 shows the circulation of cold air inside the membrane chambers of the module.

FIG. 15 shows a rotary module on a bent pipe section.

FIG. 16 shows the connection of UTM using ring lever tension locks.

FIG. 17 shows the docking of the junction of the UMTI branch pipe to the UMTI pipeline.

FIG. 18 shows a sample of the MSH for performing the coverage of the UMTI branch pipe.

The heat-insulating module (figure 1) consists of a cover 1, two side faces 2, two end faces 3 made in the form of annular sectors, a cylindrical bottom 4. resting on a heat-insulated surface 5. Inside the module there are coaxial metal membranes 7 made of a metal sheet thickness {0.05-0.2} mm and fastened with ISSH 9 and the side faces of the module 2 by resistance welding.

FIG. 2 shows a section of the module and its connection with a heat-insulating surface 5. Shows coaxial cylindrical metal membranes 7, connected to coaxial cylindrical MSH 9, arranged in a row at the ends and in places intermediate along the module length in the form of force partitions 20 located along the length of the module with calculated interval, the connection with the module cover was made by ISSH using contact welding.

FIG. 3 are shown assembled with membranes 7, cover 1, bottom 4 and side faces 2 - MSH 9, which together with membranes form a force partition accessible for air circulation.

FIG. 4 shows a flat (before bending) metal membrane 7 with two opposite edges 8, height to {3-30} mm and shelves and width {3-8} mm, which are a continuation of the edges. Membrane width - L, length - M. Membranes pass the air flow through the calibrated holes 19 into the adjacent chamber with hotter air at higher air pressure inside the adjacent cold membrane chamber.

FIG. 5 (pos. 5.1-5.3) shows a fragment of obtaining a tape spiral 24 from a metal tape with a thickness of {0.2-0.7} mm 22, wound on a rectangular (square) mandrel 23 with a radius of curvature of the corner of the edges r ₁ = {2-3 } mm. The angle of winding Z is determined by calculation and depends on the flow area and stiffness of the MSS. For power partitions, the distance between individual turns is determined based on the total flow area of the entire partition. For the manufacture of end MSSh, in order to exclude the air flow to the ends of the UTM, the winding of the tape spiral should be performed overlapping Fig. 5, pos. 5.4 (enlarged) from a pre-stamped metal strip with a thickness of {0.2-0.7} mm.

FIG. 6 shows the connection of MSH 24 with the membrane 7 by means of resistance welding. For this connection, a plastic rectangular rod is inserted inside the ISSH, the membrane is turned upside down, and the ISSH is welded to the membrane. With this resistance welding, it is necessary to provide a non-welded gap of at least 0.2 mm at the edges of the membranes - a free distance with a tolerance of (u + 5) mm for the subsequent mechanical connection of the membranes into one partition (see Fig. 9). We get a flexible assembly of the MSH and the membrane, for the regular bending of which no additional bending machines are required, this assembly is installed on the standard previous assembly and is brought in place with soft sponges to the required curvature.

FIG. 7 shows the membrane 7 bent at an angle Y (arc L) in the normal state. The dimensions of the membranes are increased along the lengths of the arcs of each subsequent row by an amount

где:

Where:

ΔL - increase in the arc length of the membrane surface of the next row;

Δρ is the linear distance from the surface of the previous row of membrane to the surface of the membrane of the next row (see Fig. 11);

L is the arc length of the membrane surface of the previous row;

Y is the angle of coverage between the inclined side faces of the membrane.

Coaxial metal membranes, joined by the inclined faces of the membranes with the lateral faces of the modules and with the MSC, form the membrane chambers 10 of FIG. 11, fig. 14 filled with air.

FIG. 8 shows an isometric view of the ISS in a bent position for illustration.

In fig. 9 shows the assembly of membranes from the ISS into a power partition. Metal membranes 7 are fixed inside the module by lateral edges 8 of the next row with membranes 7 of the previous row in a gap of 0.2 mm at a distance and with a tolerance of 5 mm. Membranes can be assembled in different ways, including by pushing the next membrane into the previous one along the cylindrical generatrix or by partially bending the faces 8 of the subsequent membrane with further initial restoration of the faces.

FIG. 10 shows power partitions 20 assembled with a heat-insulating surface 5 and a module cover 1, which is fixed by contact welding with tightening cylindrical strips 6 and coaxial MSH.

FIG. 11 shows a fragment of the connection of metal membranes with the MSS with the end face of the module using resistance welding. The membrane chambers 10 are connected to each other by calibrated holes 19 located on opposite sides of the upper and lower planes of each membrane chamber. As a result of this arrangement of the calibrated holes, convective heat exchange during natural air circulation occurs throughout the entire volume of the membrane chamber.

FIG. 12 shows the placement and fastening of kerchiefs 13 to the cover 1 by means of contact welding, supports 14 are fixed to the kerchiefs, made in the form of four sectors of a lateral cylindrical surface of height h, connected to radial orthogonal faces fixed to the surface of the kerchiefs of abutting corners, thus that the faces of the supports are located as a continuation of the faces of the module, and the four sectors of the lateral cylindrical surface, when connected, form a single cylindrical surface. In the support 14, on the cylindrical surface, holes h are made for the entry of cold air, located along the circumference in the middle of the height h, so that the wire structure of the annular tension lever lock does not shield the access of air into the cavity of the support. A protective shelf 15 is attached to the top of the support against direct ingress of water during various tests of the equipment located above (for example, a sprinkler fire extinguishing system). Cold air from the support cavity through hole A enters the cavity of the first membrane chamber.

FIG. 13 (pos. 13.1, pos. 13.2) shows one of the design options for an annular tension lever lock made of steel wire 17 with a diameter of {1.0-5.0} mm, spaced in dimension hi by strips 11. Lever 18 after fastening with a lever lock four adjacent modules, is locked by a latch 12. FIG. 13 (pos. 13.3) openings A of the covers 1 of four adjacent heat-insulating modules are visible, connected by one annular tension lever lock.

FIG. 14 shows the circulation of cold air inside the membrane chambers between the planes of the membranes 7 with natural circulation of cold air to the openings 19, which ensure the rotation of air into the adjacent chamber. The holes 19 are located on opposite upper and lower, longer sides of each membrane chamber 10. Passing along the surface along the longest path, the colder air exchanges heat with the hotter air, reducing its temperature. With a chamber length of more than 1 m and a number of chambers of 10, the total heat exchange path will be more than 10 meters.

FIG. 15 shows, for one radius of a pipeline with a heat-insulating surface 16, a unified rotary heat-insulating module (UPTM) - pos. 1P, covering the heat insulated surface of the bent section of the pipeline 16 with the radius of the pipeline bend at point O ₁ . Metal membranes and MSS are made coaxial with the center of the pipeline radius and additionally coaxial with the center of the pipeline bend radius at point O ₁ . Unified UPTM - only one for each radius of the heat-insulated surface. UPTM allows you to provide any angle of rotation of the MTI, a multiple of the angle of rotation j of one UPTM.

FIG. 16 shows the connection of the covers 1 of adjacent heat-insulating modules, covering the cylindrical heat-insulated surface 5 with the help of ring lever tension locks located at the cross-connections of the modules.

FIG. 17 shows the docking of insulation modules at the junction of the nozzle 21 to the pipeline 5 (item 17.1). In the areas where the nozzle adjoins the surface of the pipeline or heat exchanger, the UMTI is made as follows. First, a cylindrical surface of a larger diameter is insulated at positions 17.2, 17.3, for which purpose in the membranes of each of the two adjacent modules, samples are made with the radius of the surface of the adjoining pipe in Fig. 18. For the same purpose, local bending of membranes is performed from the MSS of the pipeline with the radius of the surface of the adjoining branch pipe. For the final joining of the UMTI branch pipe with the pipeline insulation surface, pos. 17.4, the abutting end of the UMTI branch pipe is modified, subjecting it to additional bending of the MSC of the butting end of the branch pipe according to the pattern of the line of intersection of the UMTI surfaces of two cylinders (descriptive geometry). The connection of the nozzle membranes with the MSH is made in a similar way in the usual end version using contact welding. When assembling two insulations of a pipeline and a branch pipe, a tight connection of two thermal insulations of different diameters is obtained.

FIG. 18 shows a sample of the MSH for performing the coverage of the UMTI branch pipe. With small diameters of the branch pipe (200 mm and less), it is allowed to perform the ISSH in the place of bend in component parts, followed by their connection using contact welding.

The decrease in the weight of stainless steel per unit of the NPP in the proposed MTI version in comparison with the BSTI of the Tianwan NPP (PRC) is 16 tons (22%).

Unified metal thermal insulation with minor changes and additions can be installed on the BSTI heat blocks without changing the geometry and dimensions of the BSTI blocks.

For reference

1. Cover

2. Side face of the module

3. End face of the module

4. Bottom

5. Heat insulated surface

6. Tightening bar

7. Membrane

8. Inclined edge of the membrane

9. Rectangular tape spiral frame

10. Membrane chamber

11. Spacer bar

12. Lever lock

13. Klondike

14. Support for lever lock in the form of a corner, height h

15. Protective shelf

16. Bent section of the pipeline

17. Steel wire

18. Lever tension lock

19. Calibrated holes

20. Power partition

21. Branch pipe

22. Stainless tape

23. Rectangular mandrel

24. Rectangular (square) tape spiral

Claims (17)

1. Metallic thermal insulation, containing on the outer surface of the heat-insulated equipment sequentially in its longitudinal direction and adjacent to each other, annular sections, each of which is made of n identical unified heat-insulating modules, characterized in that the unified metal thermal insulation (UMTI) for each the radius of the heat-insulating cylindrical surface is made of identical unified heat-insulating modules, each of which consists of an upper cylindrical cover, a lower cylindrical bottom, two flat side faces, two end ring sectors and a set of coaxial cylindrical metal membranes with rectangular flexible metal spiral frames (MSH) made from a metal tape 0.2-0.7 mm thick by winding it at an angle Z 1-89 degrees onto a corresponding mandrel and located inside the module with the dimensions of the module:

Where: Н - module height, C - the length of the arc of the outer surface of the module cover, с - the length of the arc of the outer surface of the bottom of the module, R is the radius of the outer surface of the module cover, r is the radius of the outer surface of the module bottom, n is the number of modules placed on the surface of the perimeter 2πr, Q is the angle of coverage between the lateral inclined faces of the module; metal membranes with a thickness of 0.05-0.2 mm, the shape of a cylindrical surface with two opposite inclined edges, a height of 3-30 mm, bent at an angle Y to each other, the angle Y coincides with Q - the angle of coverage of the module edges, distance and fastening of membranes inside the module along the ends, on intermediate power partitions located along the length of the module with a design interval and with the module cover, made with inclined edges, cylindrical surface of membranes and MSH using contact welding; the surfaces of the membranes form membrane chambers filled with air penetrating into adjacent membrane chambers through calibrated membrane holes located on opposite sides of the upper and lower planes of the membranes forming each chamber, air penetrates at higher pressure inside the cold membrane chamber into the chamber with hotter air, which has lower pressure, the size of the membranes increases in proportion to the lengths of the arcs of each subsequent row by the value:

Where: ΔL - increase in the arc length of the membrane surface of the next row; Δρ is the linear distance from the surface of the previous row of the membrane to the surface of the membrane of the next row; L is the arc length of the membrane surface of the previous row; Y is the angle of coverage between the inclined lateral faces of the membrane; on the bent sections of pipelines, the UMTI is made in the form of unified rotary heat-insulating modules covering the heat-insulated surface of the bent section of the pipeline; membranes and MSS are made coaxial with the center of the pipeline radius and additionally coaxial with the center of the radius of the pipeline bend; in the areas where the branch pipe adjoins the surface of the pipeline or heat exchanger, the UMTI is made with the installation of the initial insulation of a cylindrical surface of a larger diameter, followed by surface insulation, and additionally curved MSH of the adjoining pipe, made according to the templates of the intersection lines of the abutting surfaces of two cylinders; UMTI modules are interconnected by means of annular lever tension locks that connect four adjacent blocks through supports, each support is made in the form of a separate sector of the fourth part of the lateral cylindrical surface connected to radial faces fixed on the surface of the gussets of the covers of the abutting corners in such a way that the faces supports are located as a continuation of the sides of the modules, and the four sectors of the lateral cylindrical surfaces, when connected, form a single cylindrical surface of height h, on the outer surface of which there are holes for the entry of cold air and an annular tension lever lock with spacer bars providing free access of air to the holes is placed, in this case, the lever of the tension lock is configured to move in a plane perpendicular to the common axis of symmetry of the abutting faces of the modules. 2. Metallic thermal insulation according to claim 1, characterized in that the top cover, bottom bottom and membranes are made in the form of an elliptical, spherical or other curved surface, or combined, fastened together by MSH and resistance welding.

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