RU2514897C1 - Fan header and method of its manufacturing - Google Patents

Abstract

FIELD: heating.

SUBSTANCE: invention relates to a fan header and method of its manufacturing. With the help of a laser they cut shells, flanges in the form of a circumference segment, connection flanges and stands in the form of stiffening ribs. Flanges and stands are made with T-shaped slots, and shells - with response cogs. Flanges in the form of the circumference segment, connection flanges and stands in the form of stiffening ribs are welded into metal frames. Frames are fixed to shells by means of joint cogs in T-shaped slots and welding in points of jointing to form sectors. Then the produced structure undergoes hot galvanisation.

EFFECT: increased durability of a product due to fine cutting of a header and a shell blanks, and hot galvanisation of items.

3 cl, 4 dwg

Description

The invention relates to heat exchange systems and can be used in the manufacture of a manifold intended for axial fan.

In industry, the fan manifold is made by welding the prepared racks and shell to the collector and, since leashes inevitably occur, it is impossible to galvanize the product, its quality leaves much to be desired.

The invention is known CENTRIFUGAL FAN - Patent of the Russian Federation No. 2390657, which relates to the field of fan engineering, in particular to centrifugal fans, and allows using it to adjust the operation mode and effectively eliminate tear-off vortex formation in the area of the cover disk of the fan impeller. The specified technical result is achieved in a centrifugal fan containing a housing, an impeller installed in its cavity with a telescopic inlet pipe, consisting of a fixedly mounted annular guide element and a movable pipe, which form an annular channel with a shell mounted outside the movable pipe and rigidly connected with it using spokes to ensure their joint axial movement, and the movable nozzle is made telescopic and has a straight generatrix, zhnuyu toroidal shroud and outlet section, installed in an annular shroud channel has an inlet and a toroidal collector formed of inner and outer parts axially movable in the input box (1).

The invention is known. A FAN UNIT WITH A FREE RADIAL RUNNING WHEEL Effect: increase productivity with increasing static pressure and reducing noise. The fan unit contains a radial impeller 1, including the front 3 and the main 4 discs, the rear blades 5 with slats 24 installed between them and the inlet manifold 2, containing a tapered inlet 12, an output 13 sections and an additional section 16 located between them with a surface of small curvature and a length L _{ck of} at least 0.04 of the diameter D of the impeller 1. The front disk 3 and the outlet section 13 of the collector 2 are arranged to form an annular gap 15 in front of which plates 18 are installed. In a projection onto a plane, perpendicular to the axial axis 6 of the impeller 1, the straight line connecting the axis 6 and the nose 27 of the slat 24 does not exceed ± 0.05 of the angular interscapular pitch t of the blades 5 relative to the straight line connecting the axis 6 and the point 29 adjacent to the front disk 3 (2).

Known invention VENTILATOR COOLING KOCHETOV - RF Patent No. 2418250, which relates to contact coolers, in particular cooling towers, and can be used at thermal power plants for cooling circulating water. The fan cooling tower contains a housing, a spray device, a liquid collection tank and a fan, the housing consists of two parts - the upper part, including the sprinkler and a droplet separator, between which the manifold of the spray device with solid nozzles is located, and the lower part, in which the water collector tank is located collection of cooled water with a fan installed on it, and the case is made of stainless steel sheet, and in the water tank there is a diffuser, which is a part of housing and is connected to a fan made with a plastic impeller and a multi-speed electric motor, which allows, depending on weather conditions, to change the performance of the cooling tower due to changes in air flow, and the sprinkler contains tubular elements made of thermoplastic material with a lattice folded parallel to each other wall, and at the ends of the tubular elements are welded together, the tubular elements are made with a triangular cross section and between each layer of tubular electric A strip of thermoplastic material welded with tubular elements in places of their contact with the strip is laid across the tubular elements along each of their end faces, moreover, in the process of welding, the end sections of the tubular elements and the stripes laid between them are melted and form monolithic end walls of the block during melting the cavities of each of the tubular elements and the annulus are filled with hollow polymer balls, and the diameter of the balls is 5-10% larger than the maximum mesh size of the lattice APIS tubular elements. The technical result is an increase in the performance of the tower (3).

Also known is the invention of a COMBINED COOLING COOLER WITH A RATIONAL SYSTEM OF RETURNED WATER SUPPLY - RF Patent No. 2445563, which relates to a power system, in particular to heat exchangers, and can be used in circulating water supply systems of thermal power plants and industrial enterprises where tower and / or fan cooling towers are used. The combined cooling tower contains a casing, in the lower part of which there is a catchment bathtub made in the form of a casing from water-collecting shields, and an air intake device is installed over the bathtub, made in the form of louvres located around the perimeter of the casing, while the casing is installed in the upper part of the casing axial fan made of fiberglass and including a confuser located above the drip catcher, coaxial to the tower body, and rigidly connected to it, and coaxially connected to the confuser There is no cylindrical part inside which the fan impeller is placed with a gap, and a diffuser in which at least three adjustable extensions are mounted for installing a fan with an integrated electric motor, while in the middle part of the tower housing there is a water distribution system with variable section collectors and fixed on them with nozzles spraying water above the irrigation device, fixed in the housing by means of stiffeners, the water recycling system has separate guides equal contours of water preparation and consumption, at the same time, at least two water collection tanks are located in the lower part of the cooling tower housing, which are interconnected by a compensation pipe, ensuring hydraulic independence of the working water preparation and consumption circuits, while one tank is connected to a pump that delivers water cooled in the tower to the consumer, which again enters through the valve through the pipeline into the second tank, from which heated water is pumped through the filter and valve through the pipeline in the collector with nozzles located in the upper part of the cooling tower housing, and in the area between the filter and the valve, a filter hydraulic resistance control system consisting of a pressure gauge and a valve is installed. The invention improves the efficiency of using secondary energy resources by increasing the active region of the tower without increasing aerodynamic drag (4).

However, the above-described designs of the collectors do not sufficiently ensure the straightening of the air flow, which affects the efficiency of the efficiency. The proposed collector is designed for operation of an axial fan, avoiding deformation and leash during assembly of the collector sectors and their subsequent hot galvanizing.

The objective of the proposed solution is the industrial manufacture of a fan manifold of improved quality, the technical result is the durability of the product due to the precise cutting of the collector blank and shell with the possibility of hot-dip galvanizing of the product.

A fan manifold is proposed, including a collector blank with racks and a shell, characterized in that the collector blank consists of "n" sectors having a metal frame consisting of a radius segment flange, a connecting flange, a stiffener strut, fastened together by welding, each the sector is made with T-shaped grooves, the corresponding shell blank is made with mating spikes included in the sector grooves, and the collector blank sector is assembled from the blanks the shell and the ends of the racks and welding of the indicated components at the points of the grooves of the T-shape before the hot-dip galvanizing operation.

A method of manufacturing a fan manifold, including welding a collector blank with racks and a shell, characterized in that using a laser, “n” sectors of the collector blanks and the shell and racks are cut, T-shaped grooves are obtained in each sectors of the collector blank and the response spikes in the blank shells, collect the indicated components by joining them in T-shaped grooves, weld the components at the joining points, collect the welded indicated sectors into the circumference of the fan manifold by connecting them contact with each other, for example, with bolts, and carry out the operation of hot-dip galvanizing the fan manifold.

The fan manifold is shown in the figures: FIG. 1 — collector blank, FIG. 2 — shell blank, FIG. 3 — collector sector, FIG. 4 — collector assembly.

The numbers in the figures indicate: 1 - the flange of the radius segment, 2 - the groove of the T-shaped shell mount, 3 - the groove of the strut mount, 4 - the groove of the connecting frame of the frame, 5 - the connecting flange, 6 - the stiffener rack, 7 - shell, 8 - shell spike, 9 - antennae in the groove of the sector, used to fix the shell, 10 - collector sector.

The need to develop a collapsible collector arose as a result of the use of fans with a diameter of more than 1.5 m for the convenience of transportation and installation. A distinctive feature of the presented development is the accuracy of assembly, which provides the necessary parameters of the gap between the fan blades and the collector body.

To ensure the accuracy of assembly, the collector parts 1, 5, 6, 7 are made by laser cutting of a steel sheet.

The design of the collector is a metal housing of cylindrical shape, divided into sectors 10, fastened together, for example, using bolts. The fastening may be welding, riveting, etc. methods.

The collector sectors have a metal frame, consisting of parts 1, 5, 6, fastened together by welding (electric arc or semi-automatic), and a shell 7, fastened to the frame using spikes 8 included in the grooves 2 of the flanges 1. Method of connecting the shell 7 with flanges 1 of the frame allows to avoid deformation and leash when assembling the collector sectors and their subsequent hot galvanizing. Hot-dip galvanizing of a metal collector provides its resistance to corrosion, which increases its durability.

Information sources

1. Patent for the invention of the Russian Federation No. 2390657, published 05/27/2010, IPC F04D 17/08.

2. Patent for the invention of the Russian Federation No. 2429386, published September 20, 2011, IPC F04D 29/42.

3. Patent for the invention of the Russian Federation No. 2418250, published on 05/10/2011, IPC F28C 1/02, F28F 25/08.

4. Patent for the invention of the Russian Federation No. 2445563, published March 20, 2012, IPC F28C 1/06.

Claims (3)

1. The fan manifold, made in the form of a cylindrical body, consisting of interconnected "n" sectors, characterized in that each sector of the body is made in the form of bonded shells and a metal frame, consisting of welded together flanges in the form of a circle segment, connecting flanges and struts in the form of stiffeners, each flange is made with T-shaped grooves, and the shell is with mating spikes, with each metal frame connected to the shell by means of spikes placed in yanutyh grooves of the flanges, wherein the collector is configured galvanized. 2. The collector according to claim 1, characterized in that the grooves of the sector have fixing antennae. 3. A method of manufacturing a fan manifold according to claim 1, characterized in that with the help of a laser, shells, flanges in the form of a circle segment, connecting flanges and racks in the form of stiffeners are cut, while the flanges and racks are made with T-shaped grooves, and shells - with reciprocal spikes, while flanges in the form of a circle segment, connecting flanges and racks in the form of stiffeners are welded into metal frames, which are fastened to the shells by joining the spikes in the grooves of the T-shape and welding at the butt ki to form sectors, and then hot-dip galvanizing operation is carried out.

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