JPH109460A - Closed flange for common plate duct - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a leakage from a connected part in the closed flange of a common plate duct having a corner piece connected to the flange of a duct, remove the unsteadiness of a common plate duct pipe, keep the adhesion of the connected faces in the case where two common plate ducts are mutually connected, and improve executing ability. SOLUTION: In the case where the rising piece 10 of a corner piece 3 is not scratched in its bottom, and connected to the flange of the common plate duct with an inclination continuing from a bent inside edge 7, the rising piece 10 is formed to advance toward its peak 16 so that every rising piece 10 may be brought into contact with the common plate duct pipe 1. A part of a small hole 15 on the joined face between both flanges is formed into a deep wart- shape, and connected to the flange piece of the common plate duct, and an air leakage preventing agent such as a sealing agent is poured into an air leakage preventing agent pouring port. After then, in the case of connecting two common plate duct, warty projections 13 are mutually aligned, and a bolt and a nut are inserted in a hole 14 and fastened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a duct used for equipment such as air conditioning and smoke exhaust, and more particularly to a flat plate duct comprising a flange piece for connecting a flat plate duct and a corner piece connecting the flange for connection. This is related to the flange.

[0002]

2. Description of the Related Art As shown in FIG. 2, a flange piece 2 of a common plate duct is formed integrally and continuously from an end of the common plate duct, and flange pieces on each side are connected by a corner piece 3. In addition, the connection of each piece of the flange of the common plate duct by the corner piece 3 wraps around the side edge of the corner piece 3 with the L-shaped bent edge of the end side edge of the flange piece 2 of the common plate duct and caulks. When connecting the two common plate ducts connected by the corner pieces 3, a heat-resistant fiber packing 5 is interposed between the flanges of the two common plate ducts, and the bolts are passed through the holes 14 of both of the opposed corner pieces. To conclude. Further, when one side of the flange of the common plate duct becomes longer, the flange clip 6 may be installed at the center of the side. As for the corner piece 3, the valley A of the rising piece
11 had a greatly scraped shape as shown in FIG. Although there was a small hole 15 on both flange mating surfaces, the portion was flat, and there was no wart-like projection 13 shown in FIG. (See, for example, Jiko JP, Y2 No. 2-17266)

[0003] These have the following disadvantages. When connecting the corner piece 3 of the common plate duct to the flange of the common plate duct, a leak preventing material such as a sealing material must be injected into the leak preventing material injection port 4 in order to prevent a leak from the connection portion. No. At this time, in the case of the conventional corner piece having the structure shown in FIG. 3, a large amount of the air leakage prevention material was flowing out from the valley A11 of the rising piece. For this reason, a large amount of leakage prevention material is required, which increases the cost, and the number of secondary processes, such as pressing with a finger, is increased in order to make the leakage prevention material adhere to the corner piece 3 and the common plate duct at the time of construction. And the imperfection of the air leakage treatment by the air leakage prevention material. The rising valley 11
Because of this structure, when connecting to the common plate duct with the portion as a starting point, there is a fragility such as bending. Further, when connecting the corner pieces 3 to the four corners of the flange of the common plate duct, the rising piece 10 of the corner piece 3 and the bent inner edge 7 try to keep one corner of the common plate duct at a right angle. Since the portion in contact with the common plate duct pipe 1 is small, one corner could not be kept at a right angle, and play such as rattling occurred. This tendency becomes more pronounced as one side of the common plate duct becomes longer. Also, when connecting two common plate ducts having corner pieces 3 connected to the four corners, a heat-resistant fiber packing 5 is interposed between the flanges of the both plate ducts, and bolts are passed through the holes 14 of both opposed corner pieces, and nuts are formed. Although it is concluded, FIG.
In the structure of the conventional corner piece 3 shown in FIG. 5, when the bolt and the nut are viewed as the point of force 18 as shown in FIG. As a result, the metal fitting vertex 17 opposite to the flange side becomes the action point 20. For this reason, a gap is formed in the flange portion of both connected plate ducts. To correct the gap, an air leakage prevention material must be used or a new flange clip 6 must be used for fastening. The conventional flange of the common plate duct has the disadvantages of high cost, low workability, and low quality as described above. There has been a demand for a flange and a corner piece 3 of a coplanar duct which has solved these disadvantages.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a sealing flange of a common plate duct which has solved all the above-mentioned disadvantages.

[0005]

In order to achieve the above object, the sealing flange of the flat plate duct of the present invention does not scrape the valley of the rising piece 10 of the corner piece 3 as shown in FIG. When connecting to the flange of the common plate duct by making the slope continuous from the edge 7, the rising piece 10 is formed so as to face the top 16 of the rising piece so as to be in full contact with the common plate duct pipe 1, and the warp-shaped projection 13 is formed. And Further, the peripheral portion of the small hole 15 on both flange mating surfaces is formed in a deep warp shape. Then, as shown in FIG. 1, it is connected to the flange piece 2 of the common plate duct, and an air leakage prevention material such as a sealing material is injected into the air leakage prevention material injection port 4. Thereafter, when connecting the two common plate ducts, the bolts and nuts are passed through the holes 14 and fastened together with the wart-shaped projections 13.

[0006]

As a result of using the above means, the sealing flange of the common plate duct can be easily connected to the flange of the common plate duct, and the sealing flange closely adheres. Also the strength increased. In addition, the flange portions of both plate ducts connected when the two plate ducts each having the corner piece 3 installed were connected could be sealed.

[0007]

An embodiment will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a rectangular plate-shaped common plate duct pipe, and 2 denotes a flange piece of the common plate duct on each side integrally and continuously formed from an edge of the duct tube. The flange pieces are connected by a corner piece 3 as shown in the figure. The flange piece faces the flange piece of the adjacent duct pipe, and as shown in FIG. 4, a bent inner edge 7 and a bent outer edge 8 are provided as reinforcing bent edges at the distal end edge of the connecting plate portion 9 to be joined. The corner piece 3 is a metal band punched from a metal plate and bent at a right angle to a plane, and has both side edges bent to the rear side to increase mechanical strength. Then, a leakage preventing material such as a sealing material is injected into the leakage preventing material injection port 4 at a connection portion between the corner piece 3 and the common plate duct pipe 1 to perform a treatment for preventing leakage. When connecting two duct pipes, heat-resistant fibrous packing 5 is interposed between the flanges of both duct pipes, bolts are passed through both holes 14 and fastened with nuts. The above is well known.

In particular, the present invention does not scrape the valleys 10 of the rising pieces of the corner pieces 3 and make the slopes continuous from the bent inner edge 7 and connect the rising pieces 10 to the flanges of the common plate duct. 1 are formed so as to face the top 16 of the rising piece so as to be in contact with all of them.
3 is assumed. In addition, the small holes 15 on both flange mating surfaces are formed in a deep wart shape. Then, it is connected to the flange piece 2 of the common plate duct, and an air leakage prevention material such as a sealing material is injected into the air leakage prevention material injection port 4. Thereafter, when connecting the two common plate ducts, the bolts and nuts are passed through the holes 14 and fastened by aligning the warp-shaped projections 13.

[0009]

As a result of the above-described operation, when the sealing flange of the common plate duct is filled with a leak preventing material such as a sealing material in order to prevent a leak from the connection portion when engaging with the common plate. At the valleys of the rising pieces 10, the leak prevention material was filled with a small amount without flowing out extra.

Further, at the time of construction, the air leak prevention material is pressed down with a finger in order to bring the air leak prevention material into close contact with the common plate corner piece 3 and the common plate duct. In addition, since there is no extra secondary process such as omitting the use of the flange clip 6, the construction time is greatly reduced.

[0011] In addition, it was possible to completely seal in the air leakage treatment.

When connecting two common plate ducts each having the corner piece 3 installed, a heat-resistant fibrous packing 5 is interposed between flanges of both duct pipes, bolts are passed through both holes 14, and bolts are tightened with nuts. In the process of closing the nut and the nut, if the portion of the bolt and nut is regarded as the point of force 18, the warp-shaped protrusion 13 of the metal apex 17 becomes the fulcrum 19, and the connecting plate 9 becomes the point of action 20, so that the force is applied to the duct side. Takes
Therefore, the flange part of both connected ducts can be sealed,
It is no longer necessary to use a leak prevention material or to install a new flange clip 6 for further correction.

Further, since the rising piece 10 is in close contact with the common plate duct tube 1, wobbling and play of the common plate duct are improved.
Also, the strength of the corner piece was improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an example in which a corner piece 3 is connected to a flange of a common plate duct according to the present invention.

FIG. 2 is an exploded perspective view of an example in which a corner piece 3 is connected to a flange of a conventional flat plate duct.

FIG. 3 is a perspective view of a conventional corner piece 3;

FIG. 4 is a perspective view of a corner piece 3 of a sealing flange of a common plate duct according to the present invention.

FIG. 5 is an explanatory view showing the effect of the flange of the conventional flat plate duct.

FIG. 6 is an explanatory view showing an effect of the corner piece 3 of the sealing flange of the common plate duct according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Common plate duct pipe 2 Common plate duct flange piece 3 Corner piece 4 Leak prevention material injection port 5 Heat-resistant fiber packing 6 Flange clip 7 Bend inner edge 8 Bend outer edge 9 Connection plate part 10 Rise piece 11 Rise piece Valley A 12 Rising valley B 13 Wart-like projection 14 Hole 15 Small hole 16 Crest of rising piece 17 Metal apex 18 Power point 19 Support point 20 Action point

Claims (4)

[Claims] 1. The valleys 10 of the rising pieces of the corner pieces 3 are inclined continuously from the bent inner edges 7 so that the rising pieces 10 come into contact with the common board duct pipe 1 when connecting to the flange of the common board duct. The warp-like projections 13 are formed so as to face the peak 16 of the rising piece. Further, the small holes 15 on the mating surfaces of both flanges are formed in a deep warp shape. Then, it is connected to the flange piece 2 of the common plate duct, and an air leakage prevention material such as a sealing material is injected into the air leakage prevention material injection port 4. Thereafter, when connecting the two common plate ducts,
And bolts and nuts were fastened through holes 14;
Sealed flange of common plate duct. 2. A sealing flange of a common plate duct in which a warp-shaped projection 13 is provided at a metal vertex 17 of a corner piece 3. 3. A sealing flange of a common plate duct in which a valley 10 of a rising piece of a corner piece 3 is continuously inclined from a bent inner edge 7. 4. A sealing flange of a common plate duct in which all the valleys 10 of the rising pieces of the corner pieces 3 are in contact with the common plate duct pipe.