JP2524106Y2 - boiler - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boiler.

[0002]

2. Description of the Related Art A conventional boiler is shown in FIGS.

In FIG. 1, reference numeral 1 denotes a boiler main body, 2 denotes a furnace constituting the boiler main body 1, and 3 denotes a rear heat transfer section connected to the outlet side of the furnace 2.

Reference numeral 2a denotes a burner provided in the furnace 2, 4 denotes a hopper formed below the furnace 2, 5 denotes an inclined portion of the hopper 4, and 6 denotes a throat portion of the hopper 4. 6 is connected to a header 8 that extends in the furnace width direction 7 and extends in the horizontal direction.

Reference numeral 10 denotes a smoke passage extending in the furnace width direction 7 above the horizontal portion 9a of the furnace wall tube 9;
The fresh air 13 can be supplied to the inside of the furnace 2 through the slits 12 formed in the fins 11 connecting the horizontal portions 9a.

[0006] The header 8 and the smoke path 10 are
Are supported by spring hangers 15 and 16 from a back stay 14 that supports the inclined portion 5 of
When the furnace 2 is heated to a high temperature and thermally expanded, the header 8 and the smoke path 1
The difference in elongation from zero is absorbed so that the header 8, the flue duct 10 and the furnace wall tube 9 can be supported without any trouble.

Further, the entire outer surface of the boiler body 1 is covered with a heat insulating jacket 17, and the periphery of the throat section 6 is covered with a heat insulating jacket so as to cover the horizontal portion 9 a of the furnace wall tube 9 and the upper surface of the smoke passage 10. 17 are attached.

[0008]

However, the above-mentioned conventional boiler has the following problems.

That is, the throat portion 6 of the furnace wall tube 9 has no particular space and has a problem in the construction of the heat insulation jacket. In addition, since the header 8 and the flue duct 10 are supported by the back stay 14 without any hindrance to the furnace 2 that is thermally expanded due to high temperature during operation, the spring hangers 15 and 16 are used. There is a problem that many spring hangers are required.

The present invention has been made in view of the above circumstances, and has as its object to provide a boiler capable of reducing the required number of expensive spring hangers, reducing the heat insulation jacket and improving workability. Things.

[0011]

According to the present invention, a flue duct extending in a furnace width direction is provided on a furnace wall tube extending horizontally from a throat portion of a hopper formed at a lower part of a furnace, and an upper surface of the flue duct is provided on an upper surface of the flue duct. The outer peripheral portion of the leaf spring is fixed, and the leaf spring is suspended and supported on the upper surface of the leaf spring by using a rigid hanger extending vertically from a back stay supporting a hopper portion of the furnace, so that the flue path and the rigid hanger cover the furnace. The present invention relates to a boiler characterized by being provided inside a jacket.

[0012]

According to the present invention, by providing the flue duct and the rigid hanger inside the heat insulation jacket, the difference in elongation between the smoke duct and the furnace becomes small, and the heat insulation jacket becomes small.
Workability is also improved.

The difference in extension between the flue and the furnace is absorbed by the leaf spring.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 4 show an embodiment of the present invention.

In the drawings, the same components as those shown in FIGS. 5 to 7 are denoted by the same reference numerals, and the description thereof will be omitted. Hereinafter, only the configuration unique to the present invention will be described. go.

A diamond-shaped leaf spring 19 having a diagonal line extending in the furnace width direction 7 and the furnace front-rear direction 18 is placed on the upper surface of the smoke path 10, and the outer peripheral portion of the leaf spring 19 is fixed to the upper surface of the smoke path 10 by welding. Then, the central portion of the leaf spring 19 is suspended and supported from the back stay 14 supporting the inclined portion 5 of the hopper 4 by using a rigid hanger 20 such as a bar-like member or a linear member extending vertically.

The flue duct 10 and the rigid hanger 20
Is arranged inside a heat insulating jacket 21 that covers the outer surface of the boiler main body 1.

In the drawing, reference numeral 22 denotes a mounting member.

Next, the operation will be described.

The process of supporting the header 8 with the spring hanger 15 and absorbing the difference in elongation when the furnace 2 becomes hot and thermally expands during operation is the same as in FIGS.

In the present invention, the flue duct 10 is supported by the rigid hanger 20 via the leaf spring 19, but if the furnace 2 becomes hot during operation and thermally expands, the leaf spring 19 is moved to the position shown in FIG.
The furnace 2 and the smoke duct 10 are deformed as shown in FIG.
And the difference in elongation is absorbed.

At this time, the shape of the leaf spring 19 is set in the furnace width direction 7.
And as a rhombus having a diagonal line extending in the furnace front-rear direction 18, by suspending the central portion of the leaf spring 19,
The stress generated in the welded portion of the leaf spring 19 is equalized with respect to the extension of the flue duct 10 in the furnace width direction 7 and the furnace longitudinal direction 18 and the deformation of the leaf spring 19.

Since the heat insulation jacket 21 is provided outside the flue duct 10 and the rigid hanger 20, the temperature difference between the flue duct 10 and the furnace 2 is reduced, and the elongation difference between the two is also reduced. Therefore, even if an expensive spring hanger is not used, the difference in elongation can be sufficiently absorbed by the leaf spring 19, and the smoke passage 10 can be supported without any trouble.

It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that various changes can be made without departing from the spirit of the present invention.

[0026]

As described above, according to the boiler of the present invention, the required number of expensive spring hangers is reduced,
An excellent effect of reducing the heat insulation jacket of the hopper throat portion and improving its workability can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic side sectional view of a boiler furnace part showing one embodiment of the present invention.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is a view taken in the direction of arrows III-III in FIG. 2;

FIG. 4 is a view similar to FIG. 2 showing an operation state of the present invention.

FIG. 5 is a schematic overall perspective view of a boiler body illustrating a conventional example.

FIG. 6 is a schematic side sectional view of a boiler furnace part of FIG. 5;

FIG. 7 is a view taken along the line VII-VII in FIG. 6;

[Explanation of symbols]

 2 Furnace 4 Hopper 6 Throat part 7 Furnace width direction 9 Furnace wall tube 10 Smoke path 14 Back stay 19 Leaf spring 20 Rigid hanger 21 Heat insulation jacket

Claims (1)

(57) [Scope of request for utility model registration] An air channel extending in the furnace width direction is provided on a furnace wall tube extending horizontally from a throat portion of a hopper formed at a lower portion of a furnace, and an outer peripheral portion of a leaf spring is fixed to an upper surface of the air channel. The plate spring is suspended and supported on the upper surface of the plate spring by using a rigid hanger extending vertically from a back stay supporting a hopper portion of the furnace, and the flue path and the rigid hanger are provided inside a heat insulating jacket covering the furnace. Boiler characterized by the following.