RU156150U1 - SANDWICH - PANEL WITH STIFFLICTIONS - Google Patents

Abstract

1. A sandwich panel containing two sheet panels located at the same distance from each other, and provided with equally high ribs made on the inner sides of both panels, characterized in that the distance between the panels is made equal to the height of the edges of the panels; panels are made flat or with a variable radius of curvature along the length or width of the panel, or in the form of a shell, or in the form of a twisted spiral; the ribs of both panels are installed alternating relative to each other; while both panels are interconnected using a collapsible or non-collapsible connection. 2. A sandwich panel according to claim 1, characterized in that one panel is made with a variable thickness along the length or width of the panel. 3. A sandwich panel according to claim 1, characterized in that at least one panel is made bimetal. A sandwich panel according to claim 1, characterized in that at least one surface of the at least one panel is made with a corrosion-resistant, or with a reflective, or with a light-absorbing coating. A sandwich panel according to claim 1, characterized in that the space between the panels is filled with either heat insulating, or sound insulating, or water insulating material. 6. Sandwich panel according to any one of paragraphs. 1-5, characterized in that the surface shape of the outer edge of each edge of one panel is made repeating the shape of the inner surface of another panel in places of their contact. Sandwich panel according to any one of paragraphs. 1-5, characterized in that at least one rib of at least one panel is made with thickened upper edges of a T-shaped or L-shaped. Sandwich panel according to any one of paragraphs. 1-5, characterized in that

Description

This utility model relates to power structures supported by stiffeners, and can be used as an element of strength in shipbuilding, in car building, in the aviation and space industries, in the packaging and construction industries, and also as a section of a recuperator in heat power, energy, and oil refining and chemical industry.

It is known devices, a sandwich panel (SP), containing two ribbed panels located at the same distance from each other, stiffeners are installed between these panels, while the distance between the panels is made equal to the height of the stiffeners. (RU 129536 U1, 06.27.2013).

In the known device, the panels are made flat. The ribs are made in the form of a corrugated sheet, one-piece connected to both panels by means of a brazed joint at the points of contact of the protrusions of the corrugated sheet of the inner surface of both panels. The ribs are made in a wavy or zigzag shape.

A disadvantage of the known device is the relatively low structural strength due to insufficiently reliable connection of the ribs with the inner surfaces of the panels, as well as insufficient rigidity of the ribs themselves.

It is also known a device, SP, a block for fixed formwork, containing two ribbed panels located at the same distance from each other, equipped with stiffeners,

mounted on the inner sides of both panels and located in the space between these panels. (RU 74651 U1, 07/10/2008)

This device is made of two monolithic finned panels, in which the panels and ribs are made of solid billets. In this case, the ribs of both panels are mounted symmetrically against each other and are interconnected by a rigid metal bridge, forming one-piece transverse stiffening ribs, the height of which is equal to the distance between the panels. This device has high strength and can be used in the manufacture of bulkheads, walls and other structural elements of metal structures, including the use of fillers for water insulation, sound insulation and thermal insulation.

The disadvantage of this device is the rigid fastening of both ends of each stiffener to the panels, which limits the use of this device in severe operating conditions, with increased mechanical loads, and especially with alternating loads, reducing its strength.

This device contains the largest number of essential features that match the essential features of the claimed utility model, therefore, this device is taken as a prototype.

The objective of the claimed utility model is to create a more solid construction of the joint venture than the device of the prototype, while expanding the applicability.

The problem is solved by the authors as follows.

In a sandwich panel containing two finned panels located at the same distance from each other, and provided

equal stiffening ribs made on the inner sides of both panels, according to the proposed utility model, the distance between the panels is made equal to the height of the edges of the panels; the panels are made flat, or with a variable radius of curvature along the length or width of the panel, or in the form of a shell, or in the form of a twisted spiral; the ribs of both panels are installed alternating relative to each other and both panels are interconnected using a collapsible or non-collapsible connection.

Moreover, in some cases, one panel is made with a variable thickness along the length or width of the panel.

Moreover, in some cases, at least one panel is made bimetal.

Moreover, in some cases, at least one surface of the at least one panel is made with a corrosion-resistant or reflective or light-absorbing coating.

Moreover, in some cases, the space between the panels is filled with either heat insulating, or sound insulating, or water insulating material.

Moreover, in some cases, the surface shape of the outer edge of each edge of one panel is made repeating the shape of the inner surface of the other panel at the points of contact.

Moreover, in some cases, at least one rib of at least one panel is made with thickened upper edges of a T-shaped or L-shaped.

Moreover, in some cases, the ribs of at least one panel are made with a corrugated outer edge.

Moreover, in some cases, the non-separable connection of the panels is made by welding at least two extreme edges of one panel to the inner or side surface of the other panel, or using side walls.

Moreover, in some cases, the collapsible connection of the panels is made using fixing or stop elements, or using perforated fasteners mounted on the inner surface of one or both panels.

The technical result from the application of the proposed device is to improve operational characteristics and to expand the possibility of its use in comparison with the device of the prototype.

The specified technical result of improving operational characteristics is achieved by the fact that the distance between the panels is equal to the height of the equally high stiffening ribs made on the inner sides of both panels. This sign explains that when assembling a joint venture, the upper edges of the ribs of one panel touch the inner surface of the other panel, forming thrust pads, which increases the mechanical rigidity and strength of the proposed device compared to the prototype device, which uses an additional jumper to fasten two opposite edges of both panels in one rib. In this case, for panels with a variable radius of curvature along the length or width of the panel, or in the form of a shell, or in the form of a twisted spiral to provide more reliable thrust areas, the surface shape of the upper edges of the edges of one or both panels is performed repeating the shape of the inner surface of the other panel at the points of contact . For flat panels to provide more reliable thrust pads, including,

of increased area, stiffeners are made with thickened upper edges of a T-shaped or L-shaped, or the surface shape of the upper edges of the ribs of one or both panels is corrugated.

The indicated technical result of expanding the applicability of the proposed device is also achieved by the fact that the joint ventures are made flat or with a variable radius of curvature along the length or width of the panel, or in the form of a shell, or in the form of a twisted spiral. Flat joint ventures can be used as flat extended bottoms in shipbuilding. A joint venture with a variable radius of curvature along the length or width of the panel can be used as curvilinear reinforcing shells of ship or aircraft skins or as local point reinforcements for ship engines. A joint venture in the form of a shell or a twisted spiral can be used in the manufacture of walls and bottoms in explosive storage tanks, or as protective anti-vandal shells for large-diameter pipes. The possibility of manufacturing the proposed device of a curved shape is explained by the fact that flat sheet panels, one-sided finned with parallel rows of ribs, especially long panels, have low longitudinal stiffness and are easily rolled up, and also easily rolled, which expands the possibility of using the proposed device compared to the device by a prototype that does not have this capability. It should be noted that for the manufacture of the proposed device, both monolithic and prefabricated panels are used, for example, welded panels.

The specified technical result of improving the operational characteristics of the proposed device is achieved by the fact that the ribs of both panels are installed alternating relative to each other, in contrast to the prototype device in which the ribs are installed symmetrically against each other. So, with an equal number of ribs made on each panel, the number of stiffeners in the proposed device is always double the number of stiffeners in the device according to the prototype. Moreover, due to the doubling of the number of thrust pads, the mechanical strength and rigidity of the proposed device is increased. In addition, when connecting panels in a joint venture, it is possible to obtain the necessary distance between adjacent edges of different panels or to obtain double ribs, which are thrust pads of doubled area, which significantly (at times) increase the mechanical rigidity and strength of the proposed device.

The specified technical result of increasing the applicability of the proposed device is achieved by the collapsible connection of both panels in the joint venture, which allows it to be conveniently cleaned, filled or repaired in comparison with the non-separable device of the prototype. In some cases, fixing or thrust elements are additionally used, in particular, in the form of protrusions and recesses, mounted on the inner surface of one or both panels, which makes it easy and reliable to install panels with the required amount of shift relative to each other, and which is impossible for the prototype device . Moreover, in some cases, additionally used perforated fasteners on the inner surface of one or both panels to ensure the immobility of the structure. Detachable

the connection of the panels can be used in sports facilities for temporary protective coatings of the stadium field if it is necessary to maintain ice or grass cover, passing cold or warm air through the internal channels of the joint venture. It should be noted that the assembly of the joint venture is carried out directly in the installation process with minimal labor costs.

The specified technical result of improving operational characteristics is achieved by the manufacture of the proposed device non-separable, which provides immobility and increased mechanical strength of the structure of the joint venture. In some cases, a non-separable connection is made by welding at least two extreme edges of one panel to the inner or side surface of the other panel. The indicated result of expanding the applicability of the proposed device is also achieved by performing a non-separable connection using side walls that are welded to both panels. Moreover, the proposed device can be used in modular designs of various configurations due to the possibility of performing side walls of various shapes, in particular, when assembling recuperators.

The specified technical result of expanding the applicability of the proposed device in comparison with the device of the prototype in some cases is achieved by performing at least one panel with a variable thickness along the length or width of the panel, depending on the size and distribution of the mechanical load on the surface of the joint venture to which the joint venture is subjected during its operation. Moreover, the proposed device can be used in the manufacture of lightweight structural elements for aircraft, shipbuilding or rocket science.

In some cases, the specified technical result of expanding the applicability of the proposed device is achieved using one or both bimetal panels. At the same time, there is the possibility of choosing the edges or plate materials that are optimal in terms of their mechanical, thermophysical, electrical or other properties for different types of joint venture operation, as well as the choice of materials at their cost. So, in the case of using bimetallic joint ventures in recuperators, it is possible to optimize heat transfer processes by selecting materials depending on the properties of the heat transfer media.

Moreover, in some cases, the specified technical result is achieved by performing at least one surface of at least one panel with a corrosion-resistant or light-reflecting, or with a light-absorbing coating. Corrosion-resistant coating allows you to expand the application of the proposed device when working in harsh operating conditions or when working with aggressive environments, and reflective and light-absorbing coatings - in the manufacture of roofs or walls of structures in different climatic zones.

Moreover, in some cases, the specified technical result of expanding the applicability of the proposed device is achieved by filling the space between the panels with heat-insulating or sound-insulating, or water-insulating material, which can be used in the construction of theater, museum, office or medical institutions, as well as in swimming pools and other sports facilities for warming and increase comfort.

The essence of the claimed utility model is illustrated by the description and drawings of FIG. 1, FIG. 2, FIG. 3, FIG. 4 and FIG. 5, which schematically depict the main structures of the joint venture with stiffeners (panel fastening is not shown in the drawings). Welding points are indicated by bulges.

In the drawings indicated:

1 - the first panel;

2 - ribs of the first panel;

3 - second panel;

4 - ribs of the second panel;

5 - place of welding;

6 - side wall.

In FIG. 1 shows a detachable joint venture containing two flat monolithic panels 1 and 3 with stiffeners 2 and 4. The ribs 2 and 4 are installed alternating at an equal distance from each other in the space between panels 1 and 3.

In FIG. 2 shows a one-piece joint venture containing two flat prefabricated panels 1 and 3 of different thicknesses with stiffeners 2 and 4 welded to them. The ribs 2 and 4 are installed alternating at different distances from each other in the space between panels 1 and 3. The one-piece joint vent is made by welding the edges of the ribs 2 of the panel 1 to the inner surface of the panel 3.

In FIG. 3 shows an all-in-one joint venture containing two flat monolithic panels 1 and 3 with stiffeners 2 and 4 made with thickened upper edges of a T-shape. Panels 1 and 3 are installed relative to each other so that the alternating ribs 2 and 4 are placed at an equal distance from each other

in the space between panels 1 and 3. One-piece joint venture is made by welding panels 1 and 3 with side walls 6.

In FIG. 4 shows a detachable joint venture containing two flat monolithic panels 1 and 3 with double ribs 2 and 4, made with thickened upper edges of the L-shaped

In FIG. 5 shows a detachable joint venture containing two prefabricated panels 1 and 3 in the form of a shell with ribs 2 and 4 welded to them. Ribs 2 and 4 are installed alternating relative to each other in the space between panels 1 and 3. (rib thickness, thickness of panels and place of welding ribs 2 to panel 1 and ribs 4 to panel 3 are not shown).

The essence of the proposed device is as follows.

The proposed utility model, SP, is assembled from two panels 1 and 3, finned with equally high ribs 2 and 4. The distance between panels 1 and 3 is set equal to the height of the ribs 2 and 4. Panels 1 and 3 are inserted into each other towards the ribs 2 and 4, with this, the upper edges of the ribs of one panel touch the inner surface of the other panel. SP are made flat or with a variable radius of curvature along the length or width of the panel, or in the form of a shell, or in the form of a twisted spiral. In the manufacture of a joint venture with a flat shape of the inner surface of the panels, to ensure more tight contact between the upper edges of the ribs of one panel and the inner surface of the other panel at the points of contact, ribs 2 and 4 with thickened upper edges of a T-shaped or L-shaped form can be used. In the manufacture of joint ventures with a curved shape of the inner surface of the panels to ensure a more tight contact of the upper edges of the ribs of one panel with the inner surface of the other panel at the points of contact, the shape of the upper edges

the edges of one panel can be performed repeating the shape of the inner surface of another panel. In the manufacture of a joint venture for operation in seismically hazardous operating conditions or at increased alternating loads, ribs 2 and 4 with corrugated upper edges can be used, which will be damping ribs in this case, differentially distributing the external load along the thrust areas of the upper edges of the ribs. With increased load on the surface of only one of the panels of the joint venture, the specified panel can be made with a variable thickness along its length or width depending on the distribution of the load on its surface. In some cases, the variable thickness of one of the panels makes it possible to reduce the weight of the joint venture in the manufacture of shell structures and skins in shipbuilding and aircraft manufacturing. For the manufacture of joint ventures, monolithic finned panels are used, in which the ribs and sheets of the panel are a single unit, and prefabricated finned panels, in which the panels and each rib are made separately, and then connected to each other. Monolithic panels are made of a material that provides strength and rigidity of the structure by mechanical, chemical or laser milling, as well as stamping, chemical etching or pressing. In the manufacture of prefabricated panels, different materials can be used to provide strength and rigidity. Metal prefabricated panels, in particular, bimetallic, are made by surfacing, including induction surfacing, as well as welding, including welding with high-frequency currents, pressure welding or laser welding. In addition, both monolithic and prefabricated panels of any geometry and any given composition are made recently using 3D

technology and 3D printer, which provides precision accuracy in the manufacture of panels in the complete absence of waste. The joint venture is assembled using a collapsible or non-collapsible joint. A collapsible connection can be carried out using fixing or thrust elements mounted on the inner surface of one or both panels, in particular, made in the form of protrusions and recesses. The fixing and thrust elements provide a fixed amount of shift of the panels relative to each other, which can be used, in particular, in the design of recuperators. So, at the same distance between adjacent fins, the joint venture can be used as a section of a recuperator with channels of the same cross-section for heat carriers with the same thermophysical properties, and a joint venture with a pair of alternating channels of different cross-sections can be used as sections for two-way heat exchangers with two different heat carriers. Joint ventures with double ribs can be used as a section of high pressure recuperators. The motion of the collapsible joint may be provided by perforated fasteners mounted on the inner surface of one or both panels. Assembling a joint venture with a collapsible connection of panels can be performed directly at the joint venture installation site. The fixed connection of the panels can be made by welding at least two extreme edges of one panel to the inner or side surface of the other panel, or using the side walls, providing immobility and increased structural strength of the joint venture. In the joint venture, the outer edges of the edges of one panel are not attached to the inner surface of the other panel, which can be used when operating the joint venture in seismically hazardous areas or under severe conditions

operation. SP cavities are easily filled with heat-insulating or water-insulating material, which can be used in the manufacture of hardened floors in industrial premises or underfloor heating in swimming pools and other sports or leisure facilities. Filling the SP cavities with soundproofing material can be used in construction. Lightweight, delicate thin-walled welded structures of the proposed device, including those with ribs made with upper edges repeating the shape of the contact surface or with corrugated upper edges, can be used in the manufacture of aircraft panels, as well as in spacecraft to reduce the weight of the structure as a whole. For the manufacture of hardened joint ventures, in particular, for the manufacture of structural elements for attractions, in bridge building or in the manufacture of armored doors with explosion protection, joint ventures made with a large number of low-height ribs, in particular ribs with thickened upper edges of a T-shaped or L-shaped, and a small step between them. This provides increased structural strength. The proposed joint ventures can also be used in the manufacture of containers for ammunition in order to increase the durability of these containers during an explosion, using in this case all the proposed forms of joint ventures: in the form of a shell for curved walls of containers, flat for flat walls, in the form of a twisted spiral for bottoms and covers. To improve the operational characteristics of the proposed device, the following coatings can be used: anticorrosive - in harsh operating conditions, in particular, under water, in chemically hazardous rooms, in countries with a hot and humid climate, and reflective or light-absorbing - in

quality of decorative and / or energy-saving coatings for walls and / or roofs of building structures.

Examples of using the proposed utility model

1. The authors, using their know-how technology, produced a joint venture for flat bottoms of floating vehicles (barges). For this, extended metal sheet finned panels were made by welding ribs in parallel rows on one side of each panel. Ribbed panels had the following parameters:

Length, mm ... 6000

Width, mm ... 2000

The thickness of the elements, mm ... 1,5

The height of the ribs, mm ... 28

The step of welding ribs, mm ... 30

The joint ventures were made by welding two extreme edges of the panels, which were inserted into each other towards the edges. To weld the ribs to the panels, a special installation was used, which is the know-how of the authors of the proposed utility model. The joint ventures were made airtight from St3 steel and treated with an anti-corrosion protective coating. In another embodiment, the panels were made of stainless steel 12X18H10T. A fragment of the bottom of the barge was made from the mentioned joint ventures, its mechanical tests and leak tests were carried out. When testing the manufactured device, its high performance was noted, in particular, ease of installation and low weight compared to the weight of the bottom of the barge.

2. Also, the authors of the proposed utility model produced heated floors and light ceilings for industrial premises from flat collapsible joint ventures. For this,

folding panels in the form of identical modules connected to each other by fasteners.

Dimensions of modular structures:

Length, mm ... 4000

Width, mm ... 2000

The thickness of the elements, mm ... 2.0

The height of the ribs, mm ... 30

The step of welding ribs, mm ... 30

The joint ventures were made of St3 steel.

When testing the manufactured device, its high performance was noted, in particular, ease of installation and ease of installation of thermal or electrical elements in the cavities of the joint venture, as well as ease of repair work.

3. The proposed joint ventures were installed in the high-pressure recuperator as hardened sections. To do this, the proposed joint ventures in the form of high-pressure modules were installed alternating with low-pressure modules made of one ribbed panel covered with a steel non-ribbed sheet, a sheet panel. This made it possible to create efficient plate recuperators of high pressure up to 10 atmospheres.

Tests conducted for different designs made using the proposed utility model showed that any combination of essential features of the proposed device provides higher performance than the prototype device, while expanding the applicability.

Claims (10)

1. A sandwich panel containing two sheet panels located at the same distance from each other, and provided with equally high ribs made on the inner sides of both panels, characterized in that the distance between the panels is made equal to the height of the edges of the panels; panels are made flat or with a variable radius of curvature along the length or width of the panel, or in the form of a shell, or in the form of a twisted spiral; the ribs of both panels are installed alternating relative to each other; while both panels are interconnected using a collapsible or non-collapsible connection. 2. A sandwich panel according to claim 1, characterized in that one panel is made with a variable thickness along the length or width of the panel. 3. A sandwich panel according to claim 1, characterized in that at least one panel is made bimetal. 4. A sandwich panel according to claim 1, characterized in that at least one surface of the at least one panel is made with a corrosion-resistant, or with a reflective, or with a light-absorbing coating. 5. A sandwich panel according to claim 1, characterized in that the space between the panels is filled with either heat insulating, or sound insulating, or water insulating material. 6. Sandwich panel according to any one of paragraphs. 1-5, characterized in that the surface shape of the outer edge of each edge of one panel is made repeating the shape of the inner surface of the other panel in places of their contact. 7. Sandwich panel according to any one of paragraphs. 1-5, characterized in that at least one rib of at least one panel is made with thickened upper edges of a T-shaped or L-shaped. 8. Sandwich panel according to any one of paragraphs. 1-5, characterized in that the ribs of at least one panel are made with a corrugated outer edge. 9. Sandwich panel according to any one of paragraphs. 1-5, characterized in that the collapsible connection of the panels is made using fixing or persistent fasteners, or using perforated fasteners mounted on the inner surface of one or both panels. 10. Sandwich panel according to any one of paragraphs. 1-5, characterized in that the non-separable connection of the panels is made by welding at least two extreme edges of one panel to the inner or side surface of the other panel or using the side walls.

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