JPS601346Y2 - duct equipment - Google Patents

Description

[Detailed description of the invention] The present invention improves a duct device that is a multiple, especially a double duct, and in which two openings are each provided with a duct cover.
- Provides a duct device that has separate lids.

In boilers that use at least two types of fuel, if the amounts of combustion air for the fuels are different, it is necessary to have two systems in the combustion air duct, and conventionally, such double ducts were used. Two separate duct covers were installed in each case.

The present invention aims to improve the above points and provide a duct device in which a single duct cover serves as two duct covers of a double duct.

First, to clarify the drawings, Fig. 1 is a system diagram of two combustion air ducts when the amount of combustion air is different as described above, and the structure is as follows: 1 is a forced fan; 2 is an air preheater, 3 is a damper control device for adjusting air amount,
4 is a damper for adjusting air volume, 5 is a wind box, 6 is a furnace, 7 is a pipe wall, 8 is a steam drum, 9 is a water drum, 10 is a superheater, 11 is a (a) system, and 12 is a (b) system. ) system (2 systems) is shown.

In the case of these two systems, (a) system duct and (b) system duct, considering whether the installation location of the duct is appropriate and there is sufficient space, as well as the economic advantage. In some cases, a duct is constructed that brings the two systems into close contact.

This is what Figure 2 shows. 13 is a heat insulating material, and 14 is a duct cover, which was conventionally installed for each duct 11 and 12.

This would be a waste of materials, so in order to rectify this drawback, the duct device of the present invention has been improved so that one duct lid can also serve as three duct lids. Therefore, this can be applied not only to double ducts but also to multiple ducts in general.

The structure of the present invention will be explained below with reference to FIGS. 3, 4, and 5.

01 is a duct lid body, and 02 is a partition plate, which is joined (for example, welded) to the inside of the lid body in a T-shape so that the angle formed is approximately 90 degrees.

Reference numeral 03 denotes a stopper which guides and fastens the partition plate 02 when setting the duct cover.

04 is a packing, which is adhered to the inside of the stopper 03 and receives the partition plate 02.

Reference numeral 05 denotes an internal partition plate, and a notch 06 is formed in a part of the internal partition plate 05 near an opening 08 formed in the duct, within the range that can be closed by the partition flat plate 02, in order to allow entry and exit from the inside of the duct. is provided.

This prevents the internal partition plate 05 from becoming a hindrance when inspecting the inside of the duct, entering and exiting for maintenance, carrying in and out of materials, etc. through the opening 08.

The operation of the duct device having the above structure will be explained.

When attaching the duct cover, first hold the partition plate 02 of the duct cover and push it in along the upper surface of the duct internal partition plate 05.

In this way, the partition plate 02 closes the notch 06.

At this time, the stopper 03 functions as a guide.

After pushing the partition flat plate 02 sufficiently into contact with the gasket 04 inside the stopper 03, the duct cover main body 01 is tightened with bolts and nuts 07, and the installation of the duct cover is completed.

To remove the duct cover, reverse the above process.

In this way, by simply pushing the duct cover, the notch 06 provided in the internal partition flat plate 05 is closed with the partition flat plate 02, and the openings 08 of the upper and lower ducts are closed.
can be covered with the lid body 01.

This prevents air from leaking between the upper and lower passages from the notch 06 and from flowing out from the opening 08 during operation.

This is compared to the conventional structure in which openings were installed in each of the upper and lower ducts in order to enter and exit the upper and lower ducts, and a separate cover was attached to or removed from each opening. This has the great effect of saving labor and saving materials.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of a boiler having two combustion air ducts. FIG. 2 is a schematic diagram showing a conventional duct device. FIG. 3 is a perspective view showing an embodiment of the present invention. FIG. 4 is a plan view of an embodiment of the present invention. FIG. 5 is a view taken along the line B-B in FIG. 4. In the figure, 01... duct lid body, 02...
・・・・・・Partition plate, 03 ・・・Fixing metal fitting, 05
...Internal partition plate, 06...Notch,
08...Opening.

Claims (1)

[Scope of utility model registration request] In a multi-duct duct in which an internal partition plate is disposed in the duct and a plurality of passages are formed in the duct longitudinal direction, an opening is formed in the part of the duct that the internal partition plate comes into contact with. A notch is provided in the nearby duct internal partition plate,
A duct device characterized in that a partition flat plate is provided on the inside of a tact cover body that covers the opening, parallel to the duct internal partition plate, and that closes the notch.