RU2708103C2 - Supply and exhaust air duct - Google Patents

Abstract

FIELD: ventilation.

SUBSTANCE: invention relates to the field of engineering equipment of industrial buildings and can be used when equipping buildings of industrial enterprises with a ventilation system. Supply and exhaust air duct, containing inlet and exhaust air ducts, consisting of straight sections and various shaped connecting elements connected to each other in a certain sequence and installed by means of supports and suspensions, at that, at least, one section/element of air duct, preferably, most of them is made from basalt plastic, at that wall of air duct section from basalt plastic is made with thickness not less than wall thickness of similar section of metal.

EFFECT: this allows to reduce weight of elements of plenum and exhaust duct, longer service life with simultaneous reduction of labour input.

1 cl, 2 dwg

Description

The invention relates to the field of engineering equipment of industrial buildings and can be used in the equipment of buildings of industrial enterprises with a ventilation system.

Ventilation should provide normal and safe working conditions for personnel. One of its tasks in any industrial enterprises is to maintain sanitary and hygienic standards for temperature, humidity and dustiness in the air of industrial premises.

Known ventilation systems of an industrial enterprise containing air ducts of local exhausts of polluted air connected to a prefabricated exhaust ventilation duct (see Tikhomirov K.V., Sergeenko E.S. Heat engineering, heat and gas supply and ventilation: a textbook for high schools. - 4th ed., revised and supplemented - M .: Stroyizdat, 1991, Figure 13.1. and a description of it on page 245).

Known supply and exhaust duct and method of supply and exhaust duct containing the supply and exhaust ducts, consisting of straight sections and various connecting parts, elements, supports and suspensions (USSR Author's Certificate, SU 964367 A, from 07.10.1982).

The disadvantages of these ducts is the lack of tightness of individual links and connections of the ducts, which determines their use only in general ventilation systems.

Known supply and exhaust duct and method of supply and exhaust duct containing the supply and exhaust ducts, consisting of straight sections and various connecting parts, elements, supports and suspensions, while the parts and connections of the elements of the internal exhaust duct are only welded with high gas density, and the external supply air duct, which is under a higher pressure, is seam, welded, flanged or nipple, moreover, they are assembled stepwise and subsequently tionary starting from one end of the main part of the duct (RF Patent №2235253, application №2002120944 / 06 dated 30.07.2002, IPC: F24F 13/02 - prototype).

The disadvantages of the specified supply and exhaust duct are the significant mass, the susceptibility of the duct elements to corrosion, which leads to its leakage and requires the application of a special protective coating, the significant heat capacity of the metal elements, which, when the temperature changes in the daytime and at night, leads to moisture condensation with its subsequent the formation of foci of corrosion.

The task of the invention is to remedy these disadvantages, reducing the mass of the elements of the supply and exhaust duct, increasing its service life while reducing the complexity of maintenance.

The solution to this problem is achieved by the fact that in the proposed supply and exhaust duct containing the supply and exhaust ducts, consisting of straight sections and various profiled connecting elements interconnected in a certain sequence and installed using supports and suspensions, according to the invention, at least , one section / element of the duct, preferably most of them, is made of basalt plastic.

In an embodiment, a duct section of basalt plastic is connected to the remaining duct sections using flange connections.

In an embodiment, the wall of the duct section of basalt plastic is made not less than the wall thickness of a similar section of metal.

In an embodiment, the wall of the profiled elements of the duct made of basalt plastic is made not less than the wall thickness of a similar section of metal.

The execution of the walls of the rectilinear section and the walls of the profiled elements of the duct from basalt plastic with a thickness of not less than the wall thickness of a similar section / element of metal will ensure interchangeability of the elements among themselves, reduce stresses in the walls of the duct and reduce the mass of the duct as a whole.

The use of basalt plastic for the performance of elements and sections of air ducts is due to its following properties - durability, corrosion, alkali and acid resistance, and state stability. Products from this material serve more than 100 years without loss of quality. Basalt-plastic products are 3 times stronger than steel products and at the same time 4 times lighter, which is ensured by the high strength of basalt fibers, which is close to the strength of carbon fiber. The low density of the material, and, accordingly, the mass, in turn, allows you to build higher structures and save on transportation. Basalt plastic can withstand prolonged exposure to temperatures up to 700 ° C and short-term exposure to 1000 ° C, while fiberglass loses its strength at temperatures above 300 ° C. The actual fire resistance limit is at least 151 minutes. In addition, basalt plastic has a low thermal conductivity - 100 times less than metal.

Thus, basalt plastic in its characteristics successfully competes with products made of both metal and fiberglass, surpassing them in corrosion resistance, including alkali resistance and acid resistance.

The invention is illustrated by drawings, where in FIG. 1 shows a diagram of a ventilation unit; FIG. 2 - supply and exhaust duct (hereinafter referred to as the duct) with sections of basalt plastic.

The proposed supply and exhaust duct (hereinafter referred to as the duct) with sections of basalt plastic can be used as part of an air handling unit having the following structure.

The ventilation unit contains a fan system 1 of the supply system with inlet filters 2, air heaters 3, a fan 4 of the exhaust system with an aerosol filter system 5, a supply and exhaust duct including a supply 6 and an exhaust duct 7. The outlet part of the exhaust duct 7 opens into the ventilation system pipe 8. The installation includes control and measuring devices that determine the joint operation of the fans (not shown and not indicated). Part of the elements of the supply and exhaust duct — straight sections 9 and profiled sections 10 are made of basalt plastic and are interconnected with other elements of the ducts 6 and 7. The supply 6 and exhaust duct 7 open into the production room 11.

The proposed supply and exhaust duct with sections of basalt plastic can be used as part of the specified ventilation unit as follows.

The fan 1 of the supply system draws air from the surrounding atmosphere and through the filters 2 and heaters 3 feeds into the supply air duct 6. In the filters 2, the air is cleaned of impurities, and passing through the heaters 3 filled with hot water in winter and cold water in summer, it is heated / cooled and takes the required temperature. Thus, purified air with a predetermined temperature enters the supply air duct 6. From the supply air duct 6, air enters the production room 11.

From the production room 11, air, using the exhaust duct 7, is taken by the fan 4 of the exhaust system, and through the aerosol filter system 5, it enters the ventilation pipe 8, from where it enters the surrounding atmosphere.

Some elements of the supply and exhaust duct, in particular, straight sections 9 and profiled sections 10 are made of basalt plastic and are interconnected with other elements of the supply 6 and exhaust duct 7. This design allows you to significantly, several times, reduce the mass of the supply and exhaust duct , reduce stresses arising during the operation of the installation, eliminate the occurrence of corrosion and reduce the complexity of its maintenance and the ventilation installation as a whole. In addition, reducing the mass of the duct several times will reduce the size of the brackets for attaching its elements to the walls of the room.

The execution of the walls of the rectilinear section and the walls of the profiled elements of the duct from basalt plastic with a thickness not less than the wall thickness of a similar section of metal will ensure interchangeability of the elements among themselves, reduce stresses in the walls of the duct and reduce the mass of the duct as a whole.

Using the proposed technical solution will reduce the mass of the supply and exhaust duct, increase its corrosion, alkali and acid resistance, ensure the longevity of its work, which, ultimately, will make it possible to reduce the cost of the ventilation unit and its maintenance.

Claims (2)

1. The supply and exhaust duct containing the supply and exhaust ducts, consisting of straight sections and various profiled connecting elements interconnected in a certain sequence and installed using supports and suspensions, characterized in that at least one section / element the duct, preferably a large part of them, is made of basalt plastic, while the wall of the duct section of basalt plastic is made not less than the wall thickness of a similar section of metal. 2. The supply and exhaust duct according to claim 1, characterized in that the duct section of basalt plastic is connected to the remaining duct sections using flange connections.

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