STRUCTURE FOR MOUNTING INDUSTRIAL FANS IN A TUBULAR CASING

Abstract

 A structure for assembling industrial fans in a tubular casing, the casing of which is finished, at least in one of its edges, in a peripheral planar frame. It is formed by two arms which are fixed in a symmetrical position to the frame at the side opposite to that from which the casing projects; by two clamps which are fixed to the arms in selectable coinciding positions; and by a platform which is assembled between the two clamps in a position perpendicular to the arms and which is useful as a base on which the fan motor is fixed; the arms of which have respective parallel central sections, which are secant to the circular contour of the frame; and each of the clamps of which is formed by two attachable parts, with opposing holes for the passage of fixing screws as well as opposing semicircular holes at their attachable faces, which can be coupled on the straight central sections of the arms.

Description

Field of the Invention

[0001] The present invention relates to a structure for assembling industrial fans in a tubular casing, the casing of which can be short or long and is finished at one of its edges in a peripheral flange determining a peripheral frame, with a polygonal or circular contour.

Background of the Invention

[0002] Industrial fans are generally arranged with the blade located inside a tubular casing, with a circular contour, the length of which can vary according to the application of the fan. The actual fan can be assembled in an independent support, to which the tubular casing is subsequently fixed, or forming an assembly with said casing. To that end, the casing is provided at one of its edges with a peripheral flange forming a planar frame, to which a support structure can be fixed by any system, by means of welding for example, the fan motor being assembled on such support structure. Both this structure and the tubular casing are sized and designed according to the features of the fan, generally based on its dimensions or power. This requires designing a casing and support, at least with certain dimensions, for each type of fan.

Description of the Invention

[0003] The object of the present invention is to eliminate the drawbacks set forth by means of a structure which can be disassembled formed by a small number of components, which can furthermore be adapted to assemble fans with different powers and/or features, without changing the components forming the assembly.

[0004] To that end, according to the invention, the structure is formed by two arms which are fixed in a symmetrical position to the frame such that they can be disassembled, two clamps being assembled in coinciding positions on such arms, which clamps are useful as a support of a platform forming the base for the motor.

[0005] The mentioned arms have respective parallel central sections, which are secant to the circular contour of the frame and which are limited between sections perpendicularly impinging on the frame of the casing, to which they are fixed by means of screws, such that they can be assembled and disassembled quickly and easily.

[0006] The clamps are fixed in the parallel central sections of the two arms, in coinciding positions.

[0007] Each of the clamps is formed by two attachable parts having opposing holes for the passage of fixing screws, as well as semicircular opposing grooves at their attachable faces, which can be coupled to the central sections of the arms, so as to encircle them. To achieve the correct positioning of the clamps on the central sections of the arms, said sections have axial holes, whereas one of parts of each clamp has, in the corresponding groove, one or two projecting pivots, positioned and sized to be introduced in one or more of the mentioned holes of the part of the clamp.

[0008] The clamps are fixed to the central section of the arms such that one of the parts of each clamp is located in a position opposing the same part of the other clamp, i.e. the two parts are located inside the arms. These two parts have respective opposing grooves, perpendicular to the central section of the arms, through which the platform defining the base for assembling the motor is assembled. To assure the position of this platform, the part of the clamps having the groove in which such platform is assembled has holes perpendicularly opening into said groove, through which holes anchoring screws for anchoring the base are introduced.

[0009] With the mentioned constitution, the arms supporting the fan are fixed to the frame of the casing by means of screws, which allows easily assembling and disassembling the arms. In addition, the position of the clamps along the central section of the arms can be selected by providing said sections with pairs of holes, to receive the projecting pivots of one of the parts of the clamps, so as to select their position.

[0010] In addition, the platform forming the base for the motor can be fixed in a position more or less close to the frame and fixed in the selected position by means of the anchoring screws of the clamp.

[0011] The parts forming the structure are thus optimized because the clamps will be compatible with all the arms used in all the models and with all the existing motor platforms. The arms forming part of the structure are completely independent of the casing and can be exchanged with respect to such casing. In the same way, the clamps are independent and can be exchanged with the arms and platforms for holding the motor. All of this allows making different versions of structures for axial fans with the minimum amount of components. For example, fans with a casing having a different diameter and lengths, different motor powers, fans with a square frame having different dimensions, or a circular frame with blades of different diameters, fans with a round frame, etc.

Brief Description of the Drawings

[0012] The structure of the invention is described below with the aid of the attached drawings, in which a non-limiting embodiment is shown and in which:

Figure 1 is a perspective exploded view of a structure formed according to the invention.

Figure 2 is a view similar to Figure 1, showing an implementation variant, in which only the casing and arms forming part of the structure are included.

Figure 3 is a perspective view similar to Figure 2, showing an implementation variant.

Figure 4 corresponds to detail A of Figure 1, on a larger scale

Detailed Description of an Embodiment

[0013] Figure 1 shows a perspective and exploded view of a structure formed according to the invention, for assembling a fan including a blade 1 which will be actuated by the electric motor 2. The blade 1 is located inside a tubular casing 3, with a circular contour, which is finished at one of its edges in a peripheral flange 4 determining a planar frame, which can adopt any contour, for example, square, circular, etc

[0014] The structure for assembling the fan formed by the blade 1 and motor 2 in the tubular casing 3 is formed by two arms 5 which are fixed in a symmetrical position to the frame 4. These arms include a central section 6 and end sections 7 perpendicular to the central section 6. The arms 5 are supported on the frame 4 through the sections 7, coinciding with holes 8 of the frame, the sections 7 being axially threaded from their free end to be fixed to the frame by means of screws introduced through holes 8.

[0015] The arms 5 can therefore be quickly and easily assembled and disassembled by means of the fixing screws.

[0016] The structure of the invention further comprises two clamps, each of which is formed by two parts referenced with numbers 9 and 9'.

[0017] As can best be seen in Figure 4, parts 9 and 9' of each clamp are attachable to one another and have, in the opposing surfaces, respective approximately semicircular grooves 10 which will be coupled to and will encircle section 6 of the arms 5 to which they will be fixed. Parts 9 and 9' further have opposing holes 11 and 12 for the passage of fixing screws 11' for fixing the two parts to one another, once they have been assembled on section 6 of the arms 5.

[0018] To assure the positioning of the clamps, one of the parts, part 9 for example, as can be seen in Figure 4, has at the bottom of the corresponding channel 10 pivots 13 which can be introduced through holes 14 that the central section 6 of the arms 5 has.

[0019] Section 6 of the arms 5 can have several pairs of holes 14 to receive the two pivots 13 projecting from channel 10 of part 9, so as to select different holding heights of the clamps.

[0020] As can be seen in Figure 1, one of the parts 9 of the two clamps are located in a position opposing one another, located between the arms 5. These parts have at their opposing surfaces respective grooves 15 running in opposing directions in a direction perpendicular to the central section 6 of the arms 5. A platform 16, Figure 1, is assembled between the two grooves of the two parts 9, which platform will be useful as a base for assembling the motor 2.

[0021] With the mentioned constitution, the arms 5 can be easily assembled and disassembled from the frame 4 by means of their fixing screws. In addition, the clamps can also be easily assembled and disassembled from the sections 6 of the arms 5 by means of the screws securing the parts 9 and 9' that each clamp has. The height at which each clamp will be located in the section 6 of the corresponding arm can furthermore be selected, selecting the holes 14 of this section 6, Figure 5, in which the pivots 13 shown in Figure 4 will penetrate. Finally, the axial position of platform 16 in grooves 15 can be selected.

[0022] To assure the position of platform 16 in the grooves 15, the part 9 has boreholes 17 perpendicularly opening into the groove 15 to introduce the locking screws of the platform.

[0023] Figure 2 shows an implementation variant in which the frame 4 has a circular contour and has holes 8 for fixing the arms 5 and holes 8' for anchoring them to the wall.

[0024] In Figure 3, the casing 3 is finished at both edges in respective tabs 4 and the arms 5 include the central section 6 and end sections 7' forming an obtuse angle with the central section 6, such that they radially impinge on the inner surface of the casing 3 to keep sections 6 in a position parallel to one another. Figure 3 shows how sections 7' have at their ends threaded holes 20 which will oppose the holes of the casing 3 to fix them by means of screws. In this case, therefore, the arms 5 will be located inside the casing 3, but the structure will be completed in the same way as has been described with reference to Figure 1.

Claims

1. A structure for assembling industrial fans in a tubular casing, the casing of which is finished, at least in one of its edges, in a peripheral planar frame. It is formed by two arms which are fixed in a symmetrical position to the frame at the side opposite to that from which the casing projects; by two clamps which are fixed to the arms in selectable coinciding positions; and by a platform which is assembled between the two clamps in a position perpendicular to the arms and which is useful as a base on which the fan motor is fixed; the arms of which have respective parallel central sections, which are secant to the circular contour of the frame; and each of the clamps of which is formed by two attachable parts, with opposing holes for the passage of fixing screws as well as opposing semicircular holes at their attachable faces, which can be coupled on the straight central sections of the arms.

2. A structure according to claim 1, characterized in that the arms are finished in two end sections perpendicular to the straight central section, perpendicularly impinging on the frame, to which they are fixed by means of screws.

3. A structure according to claim 1, characterized in that the arms are finished in two end sections forming an oblique angle with the straight central section, radially impinging on the inner surface of the tubular casing, to which the screws are fixed.

4. A structure according to claim 1, characterized in that the central section of the arms has a series of axially aligned radial holes, whereas one of the parts of each clamp has in the corresponding groove two projecting pivots, positioned and sized to be introduced in two of the mentioned holes, so as to fix the position of said part on the arm.

5. A structure according to claim 1, characterized in that the clamps are fixed to the arms such that one of the parts of each clamp is located in a position opposing the same part of the other clamp, both parts being located inside the two arms, the parts of which have respective opposing grooves perpendicular to the central section of the arms, through which the platform bearing the motor is assembled.

6. A structure according to claim 1, characterized in that the parts of the clamp having the mentioned groove have holes opening perpendicularly into said groove, through which the anchoring screws for anchoring the platform forming the base of the motor are introduced.

Drawing