JPS6238120Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Use The present invention relates to a combustion device in which an exhaust stack is provided above a combustion chamber.

Structure of conventional example and its problems A conventional naturally open type combustion device has an inner cylinder 1, an outer cylinder 2, a bottom plate 3, and an outer top plate 4 as shown in Fig. 1.
An exhaust pipe 7 consisting of a top plate 5 having a plurality of holes and an exterior cylinder 6 was installed above the combustion chamber. In the above configuration, combustion gas is discharged from the combustion chamber to the outside through the inside of the inner cylinder 1, the holes around the top plate 5, and the holes in the upper part of the outer cylinder 6. In this case, the top plate 5
Since the exhaust gas passing through the surrounding holes is ejected obliquely upward in the outer circumferential direction, the outside air is sucked in through the hole at the bottom of the outer cylinder 6 and the gap between the lower end of the outer cylinder 2 and the lower end of the outer cylinder 6 by natural draft. The effect of mixing the exhaust gas with outside air and lowering the exhaust temperature was small. As a result, there is a risk of burns caused by high-temperature exhaust gas or an increase in the temperature of nearby objects.
There were safety issues.

Purpose of the invention In view of the above-mentioned conventional problems, the present invention aims to eliminate the danger caused by the temperature of exhaust gas and ensure safety by lowering the exhaust gas temperature.

Structure of the invention In order to achieve the above object, the present invention includes an exhaust pipe including a flue part, a flue top plate having an inverted U-shaped cross section, and an exterior body having a plurality of holes on the side, and the flue part inner cylinder The upper end of the flue top plate is provided at a higher position than the wind direction adjustment plate erected at the outer peripheral end of the flue top plate, and the lower end of the flue top plate is located at the upper end of the wind direction adjustment plate above the flue top plate. It is constructed so that it is installed at approximately the same height as the

With the above configuration, combustion gas passes from the combustion chamber to the inside of the flue part inner cylinder, between the upper end part of the flue part inner cylinder and the lower end part of the flue top plate, and the lower end part of the flue top plate and the upper end part of the wind direction adjustment plate. Since the exhaust gas is forcibly ejected almost directly upwards when passing between the The force of sucking outside air is greater than that of the gap, increasing the effect of mixing exhaust gas and outside air and lowering the exhaust temperature.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 2 shows a longitudinal cross-sectional view of a combustion device according to an embodiment of the present invention, and FIG. 3 shows an enlarged cross-sectional view of the same exhaust stack. In FIGS. 2 and 3, reference numeral 11 denotes an exhaust pipe installed above the combustion chamber 12, and a burner 13 causes the combustion chamber 12 to
When combustion is performed within the combustion chamber 12, exhaust gas rises inside the combustion chamber 12, passes through the exhaust pipe 11, and is then discharged to the outside. Reference numeral 14 denotes a flue section configured inside the exhaust pipe 11, which includes an inner pipe 15 and an outer pipe 1.
6, a top plate 17, a bottom plate 18, a wind direction adjustment plate 19, and a sound absorbing material 20. The upper end portion of the inner cylinder 15 protrudes above the upper plate 17, and the upper end portion thereof is provided at a higher position than the upper end portion of the wind direction adjusting plate 19, which is erected upward from the outer peripheral end portion of the upper plate 17. Reference numeral 21 denotes a flue top plate having an inverted U-shaped cross section and is attached above the flue section 14, and its lower end is connected to the airflow direction adjustment plate 19 above between the outer circumferential end and the inner end of the upper plate 17. It is provided at approximately the same height as the upper end. 22 and 23 are the exhaust pipes 1
The exterior tube 22 is an exterior tube and an exterior top plate that constitute one exterior body, and the exterior tube 22 is provided with a plurality of holes.

Exhaust gas is inside the exhaust pipe 11 and passes through the inner pipe 15.
It rises inside, hits the upper surface of the flue top plate 21, changes its direction downward, passes through the gap between the upper end portion of the inner cylinder 15 and the lower end portion of the flue top plate 21, and then hits the central upper surface of the upper plate 17. The exhaust gas, whose direction has changed upward again, is forcibly ejected almost directly upward when passing through the gap between the lower end portion of the flue top plate 21 and the upper end portion of the wind direction adjustment plate 19. in this case,
Air in the vicinity between the wind direction adjusting plate 19 and the outer cylinder 22 is sucked upward by natural draft, and at the same time, air is drawn upward through the hole in the center of the outer cylinder 22 and the gap between the lower end of the outer cylinder 16 and the lower end of the outer cylinder 22. After the outside air is taken in and the exhaust gas and outside air are mixed above the upper end of the wind direction adjustment plate 19, the mixed gas is discharged to the outside through a hole provided at the upper part of the exterior cylinder 22, so that the lower end of the flue top plate 21 The temperature of the exhaust gas can be lowered compared to the temperature of the exhaust gas passing through the gap between the upper end portion and the upper end portion of the wind direction adjusting plate 19.

Moreover, the lower end part of the flue top plate 21 and the wind direction adjustment plate 19
Since the exhaust gas passing through the gap between the upper end portion and the upper end portion is ejected almost directly upward, the wind direction adjusting plate 19
The force of suctioning the air near the space between the outer cylinder 22 and the outer cylinder 22 is strong, and therefore the flow rate of outside air sucked through the hole in the center of the outer cylinder 22 and the gap between the lower end of the outer cylinder 16 and the lower end of the outer cylinder 22 is large. , it is possible to increase the effect of lowering exhaust gas temperature by mixing exhaust gas and outside air.

Effects of the invention As described above, according to the invention, in a naturally open type combustion device, the exhaust stack installed above the combustion chamber is placed so that the upper end of the wind direction adjustment plate and the lower end of the flue top plate are at approximately the same height. The structure is such that the upper end of the inner cylinder of the flue is located at a higher position than the upper end of the wind direction adjustment plate, increasing the force of sucking outside air through natural draft and mixing the exhaust gas and outside air. The effect of lowering the exhaust temperature can be greatly increased, and therefore safety can be ensured by preventing dangers such as burns caused by high-temperature exhaust gas and rising temperatures of surrounding objects.

In addition, since the upper end of the flue inner cylinder is located higher than the upper end of the wind direction adjustment plate and the lower end of the flue top plate,
Even when installed outdoors, rainwater does not directly enter the combustion chamber from inside the inner cylinder of the flue section, and wind pressure is not applied directly to the combustion chamber even in the case of crosswinds, so it is possible to maintain good combustion conditions at all times. can.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view of an exhaust stack in a conventional naturally open type combustion device, Fig. 2 is a longitudinal sectional view of a combustion device showing an embodiment of the present invention, and Fig. 3 is an enlarged sectional view of the same exhaust stack. It is. 1... Inner cylinder, 2... Outer cylinder, 3... Bottom plate, 4...
Exterior top plate, 5...Top plate, 6...Exterior tube, 7...Exhaust tube, 11...Exhaust tube, 12...Combustion chamber, 13...
... Burner, 14 ... Flue section, 15 ... Inner cylinder, 16
...Outer cylinder, 17...Top plate, 18...Bottom plate, 19...
...Wind direction adjustment plate, 20... Sound absorbing material, 21... Flue top plate, 22... Exterior tube, 23... Exterior top plate.

Claims (1)

[Scope of utility model registration request] An exhaust pipe is provided above the combustion chamber, and the exhaust pipe consists of a flue part, a flue top plate having an inverted U-shaped cross section, and an exterior body having a plurality of holes on the side surface, and the upper end of the flue part inner cylinder. the upper plate of the flue section is provided at a higher position than the wind direction adjusting plate erected at the outer peripheral end of the upper plate of the flue part, and the lower end of the flue top plate is connected to the upper end of the wind direction adjusting plate above the upper plate of the flue part. Combustion devices installed at approximately the same height.