JPH0960954A - Duct - Google Patents

Abstract

PROBLEM TO BE SOLVED: To absorb a mounting error even when an mounting error is produced on a stiffener by providing an extension width which extends one side of two duct boards which adjoin each other and joining each adjacent stiffener by way of the extension width. SOLUTION: This duct 1 consists of duct boards 2 and 3 and is reinforced with stiffeners 4 and 5 which wind up around the duct 1. The joining areas of the duct boards 2 and 3 are completely sealed by seal welding. The boards are welded over the whole length or partially so as to hold proper strength. In addition to that, each joining area of the adjacent boards 2 and 3 is welded by extending one duct board 2 so as to provide an extension width 13. Both stiffeners 4 and 5 are joined with each other by way of this extension width 13. The presence of this extension width 13 makes it possible to absorb pitch errors of the stiffeners 4 and 5 since the adjacent stiffeners 4 and 5 join each other by way of this extension width 1 even if the stiffeners 3 and 4 produce any pitch errors.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a duct applied to a clinker hopper of a boiler, an ash processing hopper, a plate structure device and the like.

[0002]

2. Description of the Related Art FIG. 4 is an explanatory view of a conventional duct used in a clinker hopper of a boiler, an ash processing hopper, a plate structure device and the like. In the figure, a conventional duct 101 is provided outside the duct plates 102 and 103 with stayeners 104 and 10.
5, the duct plates 102 and 103 are joined by seal welding 109 via a corner angle 108,
The stiffeners 104 and 105 have a structure in which they are directly joined to each other and hold the duct 101.

[0003]

As described above, in the conventional duct, the staplers 104 and 105 are directly joined to each other, and when an error occurs in the mounting pitch of the staplers 104 and 105, the staplers 104 and 10 are connected.
No 5 can be welded together. Also, the duct 10
When the angles 106 and 107 formed by the ridgelines at 1 are not 0 degrees, the staplers 104 and 10 are set at the angles 111 and 112.
5 are joined to each other, but if an error occurs in the angles 111 and 112, the surfaces of the stiffeners 104 and 105 are separated from each other, so that welding cannot be performed. Further, since these joints are constructed at the construction site, there is no facility like in a factory, and the joints cannot be easily adjusted.

Also, the stiffener 10 is joined to each other.
Since there is a gap between the centers of gravity of Nos. 4 and 105, a torsion moment is generated. This torsional rigidity is 10
Since it is in the 4,105 cross section, a large force cannot be transmitted. This problem becomes more serious as the angles 106 and 107 formed by the ridges of the duct 101 increase.

Further, since the duct plates 102 and 103 are temporarily joined with the bolt 110 via the corner angle 108 and then seal welded 109, when the bolt 110 is attached, work from both inside and outside of the duct 101 is required. You can't work only from the outside. Further, the holes of the bolts 110 are formed in the duct plate 102 and the corner angles 108.
Although it is necessary to open both holes, it cannot be processed so that the pitches of the bolt holes of both are the same unless a special jig is used because they are processed separately.

[0006]

DISCLOSURE OF THE INVENTION The duct according to the present invention is intended to solve the above-mentioned problems. A duct plate is joined by welding to form a square shape, and a stiffener is provided on the outer surface of the duct plate in the circumferential direction. In the reinforced duct, one of the duct plates that are adjacently joined to each other is extended to provide an extension width, and the stapler adjacent to each other is joined via the extension width. That is, in the duct according to the present invention, one of the duct plates joined adjacent to each other in the duct reinforced by providing the duct plates by welding to form a square shape and providing the outer surface of the duct plate with the stiffener in the circumferential direction. The extension width is extended to connect the adjacent stapler to each other through the extended width. Even if the adjacent stapler has a mounting error, the stapler cannot be directly connected to each other. Instead, since the stayers are joined to each other through the extended width of the duct plate, the mounting error is absorbed by the extended width of the duct plate. Further, even if there is a deviation width between the center of gravity of the adjacent staplers, a large force is generated due to the sufficient joint surface being formed between the extended width of the duct plate and the stayer against the torsional moment due to the deviation between the centers of gravity. Can be transmitted.

The duct according to the present invention is a duct in which a duct plate is joined by welding to form a square shape, and a stiffener is circumferentially provided on the outer surface of the duct plate for reinforcement.
One of the duct plates joined adjacent to each other is extended to provide an extension width, and the stay fasteners adjacent to each other are joined via the extension width, and the stay fasteners joined to the extension width of the duct plate are joined together. Providing a plate-shaped rib on the end face,
It is characterized in that the stay funnel and the extension width are joined via the rib. That is, in the duct according to the present invention, one of the duct plates joined adjacent to each other in the duct reinforced by providing the duct plates by welding to form a square shape and providing the outer surface of the duct plate with the stiffener in the circumferential direction. An extended width is provided by extension, and adjacent staplers are joined together via this extended width, and plate-shaped ribs are provided on the end faces of the staplers joined to the extended width of the duct plate. Since the stay widths are joined to each other by the extension width of the duct plate, the stay widths are not directly joined even if there is a mounting error in the adjacent stay stitches, but the stay widths are joined to each other via the extension width of the duct plate. The extension width of the duct plate absorbs the mounting error. Also,
Even if there is a gap between the center of gravity of the adjacent staplers, a large force is transmitted due to the sufficient joint surface being formed between the extended width of the duct plate and the stapler against the torsional moment due to the difference between the centers of gravity. obtain. Further, when the angle formed by the ridgeline of the duct increases, the shift width between the center of gravity of the adjacent staplers increases, but a larger force can be transmitted by providing the ribs at the ends of the staplers.

Further, the duct according to the present invention is a duct in which a duct plate is joined by welding to form a rectangular shape and a stiffener is circumferentially provided on the outer surface of the duct plate for reinforcement.
One of the duct plates joined adjacent to each other is extended to provide an extended width, and the stapler adjoining each other is joined via the extended width, and a fitting is provided outside the duct plates joined together. It is characterized in that the duct plate and the extended width of the duct plate are joined via the fitting. That is, in the duct according to the present invention, one of the duct plates joined adjacent to each other in the duct reinforced by providing the duct plates by welding to form a square shape and providing the outer surface of the duct plate with the stiffener in the circumferential direction. The extension width is extended to join the adjacent staplers through this extension width, and the fittings are provided on the outside of the duct plates to be joined to each other, and the duct plate and the duct plate are extended through the fittings. The width is joined to each other, and even if an error occurs in the attachment of adjacent stays, the stays are not joined directly but the stays are joined to each other via the extended width of the duct plate. Mounting error is absorbed by the extension width of the plate. Further, even if there is a deviation width between the center of gravity of the adjacent staplers, a large force is generated due to the sufficient joint surface being formed between the extended width of the duct plate and the stayer against the torsional moment due to the deviation between the centers of gravity. Can be transmitted. Further, since the fittings are provided on the outside of the duct plates when the adjacent duct plates are temporarily joined to each other, the joining can be performed only from one direction on the outside of the duct.

[0009]

1 to 3 are explanatory views of ducts according to first to third embodiments of the present invention, respectively. In the drawings, the ducts according to these embodiments are used in a clinker hopper of a boiler, an ash processing hopper, a plate structure device, and the like, and a duct 1 is provided with stayers 4 and 5 on the outside of duct plates 2 and 3. The duct plates 2 and 3 are joined to each other by a structure in which the duct plates 2 and 3 are directly joined to each other.

In FIG. 1, a duct 1 according to the present embodiment is composed of duct plates 2 and 3 as shown in the drawing, and the circumference of the duct 1 is surrounded by the stayers 4 and 5 so as to withstand the load applied to the duct 1. It is rolled and reinforced.
The joints between the duct plates 2 and 3 are completely sealed by seal welding so that the fluid in the duct 1 does not leak, and welding is performed over the entire length or a part thereof in order to maintain appropriate strength. In the special case of seal welding, there is a place where the outer welding also serves. Adjacent duct plates 2 and 3 are joined to each other by extending one duct plate 2 and providing an extension width 13 and welding, and via this extension width 13, both the staplers 4 and 5 are joined to each other. Although the stayers 4 and 5 are channel steels, they may be other flat steels, mountain steels, H-shaped steels, T-shaped steels, or steel materials having a box-shaped cross section.

As described above, in this duct, since one duct plate 2 is extended to have the extension width 13, even if an attachment error occurs in the pitch of the stayers 4 and 5, the extension width 13 is used. Since the adjacent staplers 4 and 5 are joined to each other, the extension width 13 can absorb an error in the pitch of the staplers 4 and 5, and the adjustments such as bending and correcting the staplers 4 and 5 are not necessary. It is also possible to join the staplers 4 and 5. Therefore, extra adjustment work is eliminated and the assembly cost is reduced. Further, although a torsional moment is generated due to the deviation of the center of gravity of the staplers 4 and 5, the synthetic cross section with the stapler is formed by the extension width 13 of the duct plate 2 as shown in FIGS. It is possible to transmit a large torsional moment. Further, the duct plate 3 is the duct plate 2
By being joined to the extended width 13 of the above, it is not necessary to join through the corner angle as in the conventional case. Therefore, in the case of the corner angle and the duct plate, it is necessary to weld at four ridge lines, but in this duct 1, there are two halves, and the number of man-hours for welding is halved. Since materials such as are no longer needed, processing costs, material costs, etc. are reduced. Further, in the conventional duct, the corner angle is attached to the inner surface side of the duct and shipped from the factory. Therefore, the projection space of the corner angle increases the transportation space, but in the duct 1, the corner angle is not necessary. Therefore, the transportation cost is reduced. The extension width 13 in one duct plate 2 may be provided in the other duct plate 3.

In FIG. 2, the duct according to the present embodiment has ribs 15 and
16 is attached and the stayers 4, 5 are joined to each other via the extension width 13 of the duct plate 2, and the ribs 14, 1 are attached.
5, the joint surface with the adjacent stapler is large. The other structure is substantially the same as the duct according to the first embodiment.

When the angle formed by the ridgeline of the duct increases,
Although the deviation width of the center of gravity of both the stay funners 4 and 5 increases, the torsional moment acting on the stay funners 4 and 5 also increases. However, by providing the ribs 14 and 15 in this way, the joint surfaces of the stay funners 4 and 5 become large. As a result, a larger force can be transmitted and a strong duct structure can be obtained.

Referring to FIG. 3, in the duct according to the present embodiment, a fitting 20 is attached to the outer surface of the duct plates 2 and 3 as shown in the figure, and the bolt 8 is attached when the duct plates 2 and 3 are temporarily joined. To be joined to each other. It is necessary to match the pitch of the holes of the bolts 8 with the duct 2 side, but the fitting 20 is provided with elongated holes 21 so that the bolts 8 can be joined even if there is some error in the pitch. In addition, the extension width is provided so that only the joint portion with the stayers 4 and 5 is protruded larger than the other portions to reduce the material cost. The strength of this portion is compensated by increasing the plate thickness. The other structure is substantially the same as the duct according to the first embodiment.

The duct plates 2 and 3 are bolts 8 at the time of temporary joining.
Although they are joined to each other by the fitting, since the fitting 20 is provided outside the duct, the joining work can be performed even from one direction, and the assembling is easy. Also, the long hole 21
By using the fitting 20 having the above, the work of joining the duct plates 2 and 3 is further facilitated. Further, since the joint portion by the bolt 8 is on the outside of the duct, seal welding for the elongated hole 21 is also unnecessary. Therefore, the cost of the duct assembly operation is reduced.

In the conventional duct, the staplers are directly joined to each other, and if there is an error in the mounting pitch of the staplers, the staplers cannot be welded to each other. Further, when the angle formed by the ridgelines in the duct is not 0 degree, the staplers are joined to each other at a certain angle, but if an error occurs in this angle, the surfaces of the staplers are separated from each other and welding cannot be performed. Further, since these joints are constructed at the construction site, there is no facility like in a factory, and the joints cannot be easily adjusted. In addition, since there is a gap between the center of gravity of the staplers joined to each other, a torsion moment is generated. Since this torsional rigidity is in the cross section of the stapler, a large force cannot be transmitted. This problem becomes more serious as the angle formed by the ridgeline of the duct increases. Further, since the duct plate is temporarily welded with a bolt through a corner angle and then seal-welded, when the bolt is attached, the work is performed from both the inside and the outside of the duct, and the work cannot be performed only from the outside. Also, it is necessary to drill the bolt holes on both the duct plate and the corner angle, but since they are processed separately, it is necessary to machine them so that the pitches of both bolt holes match unless a special jig is used. However, in each of the above-mentioned ducts, the duct plates 2 and 3 are extended to provide an extension width 13, and both the stay funners 4 and 5 are joined to each other via the extension width 13 so that the installation error of the stay funners 4 and 5 is eliminated. The extension width 13 is effective in increasing the torsional rigidity. Also, ribs 14 and 1 are attached to the ends of the stapler 4 and 5.
By providing 5, the large force can be transmitted through the extension width 13 of the duct 1. In addition, the duct plate 2,
By providing the fittings 9 and 20 for joining 3 to each other on the outside of the duct 1, the fittings can be joined only from the outside, and by making the bolt holes formed in the fitting 20 into elongated holes 21, It can be easily processed without a special jig. Further, even if an attachment error occurs in the pitch of the stay funners 4 and 5, the stay funners 4 and 5 are not directly joined to each other but are joined to each other via the extension width 13 of the duct plates 2 and 3. Therefore, the error can be absorbed within the extension width 13. Further, even if there is a deviation width between the center of gravity of both the staplers 4, 5, a large cross section is formed by the extension width 13 of the duct 1 and the stayers 4, 5 with respect to the torsional moment due to the deviation width, and a large force is transmitted. be able to. Further, when the angles 6 and 7 formed by the ridgeline of the duct 1 increase, the deviation width increases, but by providing the ribs 14 and 15 at the ends of the stayers 4 and 5, a larger force can be transmitted. Further, since the fittings 9 and 20 are outside the duct 1 when the duct plates 2 and 3 are temporarily joined to each other, the joining work can be performed even from one direction, and the seal welding of the bolt holes can be omitted. . Further, the extension width 13 obtained by extending one of the duct plates 2 and 3 can absorb an error in the mounting pitch of the stay funners 4 and 5 without adjusting the bending of the stay funners 4 and 5 and the corner angle is unnecessary. Become. Also,
Since the extension width 13 can increase the torsional rigidity and can transmit a large force, the cost for processing, assembling, etc. is reduced, and the strong duct 1 is formed. Further, by attaching the ribs 14 and 15 to the ends of the stayeners 4 and 5, it is possible to secure a greater torsional rigidity and to provide the duct 1 with high reliability. Further, by attaching the fittings 9 and 20 to the outside of the duct 1, the temporary assembly can be performed only by the work from one side, and by providing the elongated hole 21, the assembly is further facilitated and the seal welding is unnecessary. As a result, the assembly cost is reduced.

[0017]

The duct according to the present invention is constructed as described above, and even if the adjacent stiffeners have an attachment error, the stiffeners are joined to each other through the extended width of the duct plates so that the duct plates are joined together. The extended width absorbs a mounting error, and a large force can be transmitted even if there is a gap between the centers of gravity of the adjacent staplers, so that the manufacturing cost is reduced and a strong duct is formed.

[Brief description of drawings]

FIG. 1 (a) is a perspective view of a duct according to a first embodiment of the present invention, FIG. 1 (b) is a perspective view of a stayener thereof, FIG. 1 (c) is a plan view, and FIG. FIG. 3D is a sectional view taken along the line DD of FIG. 7C, and FIG.

2 (a) is a perspective view of a duct stayer according to a second embodiment of the present invention, and FIG. 2 (b) is a plan view thereof.

FIG. 3 (a) is a perspective view of a duct plate of a duct according to a third embodiment of the present invention, FIG. 3 (b) is a cross-sectional view, and FIG. 3 (c) is a perspective view of its fitting. Is.

4 (a) is a perspective view of a conventional duct, FIG. 4 (b) is a perspective view of a stayener thereof, FIG. 4 (c) is a plan view, FIG. 4 (d) is a sectional view, and FIG. 8E is a view taken along the line EE in FIG. 6C, and FIG. 8F is a cross-sectional view taken along the line FF.

[Explanation of symbols]

 1 duct 2 duct plate 3 duct plate 4 stay funner 5 stay funner 6 angle formed by ridge line of duct 7 angle formed by ridge line of duct 8 bolt 9 fitting hardware 13 extension width of duct board 14 rib 15 rib 20 fitting hardware 21 long hole

Claims (3)

[Claims] 1. In a duct in which duct plates are joined by welding to form a rectangular shape and a stiffener is circumferentially provided on the outer surface of the duct plate for reinforcement, one of the duct plates joined next to each other is extended. An extension width is provided, and the above-mentioned staplers adjacent to each other are joined via the extension width. 2. A plate-shaped rib is provided on an end surface of the stay funner joined to the extension width of the duct plate, and the stay funner and the extension width are joined via the rib. The duct described in. 3. A fitting is provided on the outside of the duct plates to be joined to each other, and the duct plate and the extended width of the duct plate are joined via the fitting. Duct.