JPH0154625B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to hot water boilers, and more particularly to improvements in hot water boilers that use spiral water tubes wound in a cone shape.

Conventional technology A hot water boiler in which a cone-shaped spiral water tube is placed horizontally in the combustion chamber (Special Publication No. 52-38261)
has already been proposed by the applicant. In hot water boilers of this type, the spiral water pipes with both ends connected to the water chamber are cone-shaped, that is, the winding diameter on the water inlet side is large, and the winding diameter gradually becomes smaller as it reaches the hot water discharge side. The spiral water pipe is placed horizontally in the combustion chamber so as to surround the combustion flame of the burner, and by heating the spiral water pipe, forced circulation is generated from the large diameter part to the small diameter part. It is being

In a hot water boiler that uses such a cone-shaped spiral water tube, steam can be obtained on the small diameter side of the spiral water tube, and this steam is released into the water chamber, thereby increasing the temperature inside the water chamber. However, conventional cone-shaped spiral water tube type hot water boilers have a limited heating capacity, and hot water boilers with even higher capacity have been desired.

Purpose of the Invention The present invention is an attempt to improve the conventional situation as described above, and the purpose of the present invention is to improve the heating capacity of a hot water boiler and obtain a boiler with higher thermal efficiency. .

Structure of the Invention The gist of the present invention is to provide a smoke chamber in the upper part of the combustion chamber, a water chamber in the outer periphery of the combustion chamber and the smoke chamber, and a cone-shaped spiral water pipe in the combustion chamber to surround the combustion flame of the burner. When placed horizontally, a small-diameter annular water pipe and a large-diameter annular water pipe face each other at both front and rear ends, and between both annular water pipes there is a connecting pipe whose both ends communicate with both annular water pipes, and a small-diameter annular water pipe at one end. A connecting pipe that communicates with the annular water pipe and has the other end closed on the large diameter annular water pipe side, and a connecting pipe that has one end closed on the small diameter annular water pipe side and the other end that communicates with the large diameter annular water pipe are placed horizontally. The heating pipe to be formed is housed in the spiral water pipe such that the small diameter annular water pipe side is located on the small diameter side of the spiral water pipe, and the small diameter annular water pipe is connected to a hot water discharge pipe communicating with the water chamber, while the spiral water pipe One end of the large-diameter side is connected to a water guide pipe communicating with the water pipe, and one end of the small-diameter side is connected to the small-diameter annular water pipe, and
A plurality of heat absorption pipes are installed horizontally in a horizontal line in the smoke chamber in multiple stages in the vertical direction, and each end of each heat absorption pipe is connected to a water pipe, and the other end is closed. The reason is that it is slightly inclined with the closed end side up.

Embodiments Specific embodiments of the present invention will be described below with reference to illustrative drawings. In the drawings, 1 is a cylindrical outer cylinder with a lid, 2 is an inner cylinder with a lid and built in the outer cylinder 1, and a water chamber 3 is formed between the outer cylinder 1 and the inner cylinder 2. A combustion chamber 4 is formed at the lower end of the inner cylinder 2 with an opening 4' projecting outward from the side wall of the outer cylinder 1. The upper part of the combustion chamber 4, that is, inside the side wall of the inner cylinder 2 is a smoke chamber 5, and at the top of the smoke chamber 5, a chimney 6 is connected to a water chamber 3.
It is erected with the inside penetrated and facing upward. A burner 7 is fixed horizontally on the side of the opening 4' of the combustion chamber 4, and is provided so that its combustion flame is injected horizontally toward the back of the combustion chamber 4. Combustion chamber 4
Inside, there is a cone-shaped spiral water tube 8 and a heating tube body 9 (to be described later) housed within the spiral water tube 8, such that the winding diameter becomes gradually smaller from the base toward the tip. It is placed horizontally so as to surround the combustion flame of the burner 7. The base of the spiral water pipe 8, that is, one end on the large diameter side, is communicated with the lower end of a water pipe 10 installed vertically in the water chamber 3, and the upper end opening 10' of the water pipe 10 is connected to the lower end of the water pipe 10. The spiral water pipe 8 is provided so as to face near the upper end, and the distal end of the spiral water pipe 8, that is, one end on the small diameter side, is communicated with a small diameter annular water pipe 11a constituting the heating pipe body 9.

The heating pipe body 9 has a small diameter annular water pipe 11a and a large diameter annular water pipe 11 provided facing each other at both front and rear ends thereof.
b, and a plurality of connecting pipes 12a, 1 horizontally extending at regular intervals between both annular water pipes 11a, 11b.
2b and 12c, and the heating tube body 9 is formed to have a truncated conical shape, and the heating tube body 9 is inserted into the spiral water tube 8 with the small diameter annular water tube 11a side located on the small diameter side of the spiral water tube 8. It will be stored. Further, as mentioned above, among the plurality of connecting pipes 12a, 12b, 12c that are horizontally spanned between both the annular water pipes 11a, 11b, any connecting pipe 12a has both ends connected to both the annular water pipes 11a, 11b.
11b, and the other connecting pipe 12b is provided so that one end thereof communicates with the small-diameter annular water pipe 11a, and the other end is closed on the large-diameter annular water pipe 11b side. The other connecting pipe 12c is provided so that one end thereof is closed on the small-diameter annular water pipe 11a side, and the other end is communicated with the large-diameter annular water pipe 11b. The small-diameter annular water pipe 11a has a hot water discharge pipe 1 extending upward inside the water chamber 3.
The lower ends of the water chamber 3 are connected to each other, and the distal end opening 13' of the water discharge pipe 13 is provided so as to face near the upper end of the water chamber 3.

On the other hand, in the smoke chamber 5, a plurality of heat absorption pipes 14 are installed horizontally in a row at regular intervals.
... are provided in multiple stages in the vertical direction. The heat-absorbing tubes 14 are provided so as to have a lattice-like shape when viewed from above, and their horizontal direction is displaced by 90 degrees for each stage. Each endothermic tube 14 is formed such that one end communicates with the water chamber 3 and the other end is closed, and is slightly inclined with the closed end facing upward. In addition, in the drawing, 15 indicates a water supply pipe communicating from the outside into the water chamber 3, and 16 indicates a hot water supply port opened at the upper part of the water chamber 3.

Next, its effect will be explained.

When the burner 7 is ignited while the water chamber 3 is filled with water, its combustion flame is injected inside the heating tube 9 and the spiral water tube 8, heating the heating tube 9 and the spiral water tube 8, respectively. This will result in The water introduced into the spiral water pipe 8 from the water chamber 3 via the water conduit 10 is sequentially heated by heating the spiral water pipe 8 as described above, and becomes hot water or steam.
This hot water or steam moves to the small-diameter side through the forced circulation of the spiral water pipe 8, and is sent into the small-diameter annular water pipe 11a of the heating tube body 9 from the same small-diameter part. The hot water or steam sent into this small-diameter annular water pipe 11a is further heated as the heating pipe body 9 is heated by the combustion flame of the burner 7 as described above. A part of the hot water or steam sent into the small-diameter annular water pipe 11a enters the large-diameter annular water pipe 11b from the same small-diameter annular water pipe 11a via the connecting pipe 12a, and is transferred from the same large-diameter annular water pipe 11b to the other connecting pipe 12a. While a part of the other hot water or steam is sent from the small diameter annular water pipe 11a toward the back of the connecting pipe 12b,
In addition, an effect is obtained in which the water is forcibly circulated within the connecting pipe 12b so as to return to the small diameter annular water pipe 11a, and furthermore, as described above, the water flows from the small diameter annular water pipe 11a to the connecting pipe 12a.
A part of the hot water or steam that entered the large-diameter annular water pipe 11b through the large-diameter annular water pipe 11b is sent toward the back of the connecting pipe 12c from the large-diameter annular water pipe 11b, and then returns to the large-diameter annular water pipe 11b. The effect of forcibly circulating the inside can be obtained.

In the process of being refluxed and circulated within the heating pipe body 9 in this way, the hot water or steam sent from the spiral water pipe 8 becomes high-temperature steam, and this high-temperature steam is passed through the hot water discharge pipe 13 to the water chamber. The water is released into the water chamber 3 and has the effect of increasing the water temperature in the water chamber 3.
Then, the hot water in the water chamber 3 is sucked in again through the water conduit pipe 10 by the forced circulation action acting on the spiral water pipe 8, and the temperature raising action as described above is repeated.

On the other hand, the combustion flame that heated the heating tube body 9 and the spiral water tube 8 becomes hot air that rises through the smoke chamber 5 and is discharged outside through the chimney 6. Each of the plurality of heat absorption tubes 14 is heated, and an effect of increasing the temperature of the water inside the heat absorption tubes 14 is obtained. The hot water heated in this manner is discharged into the water chamber 3 from the open end side of the heat absorption pipes 14, and one of the closed ends of the heat absorption pipes 14 is located at the top. By being installed obliquely in the heat absorbing tubes 14, the residence time of hot water in the heat absorbing tubes 14 becomes longer, and the temperature can be increased accordingly.

Effects of the Invention The present invention is constructed as described above, and includes:
As mentioned above, by further heating the hot water or steam obtained by heating the spiral water tube in the combustion chamber with the heating tube body, it has become possible to obtain steam at an even higher temperature. This has made it possible to significantly improve its heating capacity. As a result, it has become possible to raise the temperature of the water in the water chamber in a short time and save fuel accordingly, making it possible to obtain a boiler with higher thermal efficiency.

Furthermore, in the present invention, when a plurality of heat absorption pipes are installed horizontally in a row in the smoke chamber in multiple stages in the vertical direction, one end of each heat absorption pipe is communicated with the water chamber. , and by forming the other end so as to be closed and slanting it slightly with the closed end side up, it is possible to effectively absorb the residual heat of the combustion flame, increasing its thermal efficiency. I was able to improve it even further.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of a hot water boiler according to the present invention, Fig. 2 is a partially cutaway front view of the main part, Fig. 3 is a sectional view taken along line A-A in Fig. 2, and Fig. 4 is a longitudinal sectional view of the hot water boiler according to the present invention. Same B-
5 is a sectional view taken along the line C--C in FIG. 1. 1...Outer cylinder, 2...Inner cylinder, 3...Water chamber, 4...
Combustion chamber, 4'...Opening, 5...Smoke chamber, 6...Chimney, 7...Burner, 8...Spiral water pipe, 9...Heating tube body, 10...Water pipe, 10'...Opening Part 1
1a...Small diameter annular water pipe, 11b...Large diameter annular water pipe, 12a, 12b, 12c...Connecting pipe, 13...
...exhaust pipe, 13'...opening, 14...heat absorption pipe,
15...Water pipe, 16...Hot water inlet.

Claims (1)

[Claims] 1. A smoke chamber is provided in the upper part of the combustion chamber, a water chamber is provided around the combustion chamber and the outside of the smoke chamber, and a cone-shaped spiral water tube is installed horizontally in the combustion chamber so as to surround the combustion flame of the burner. In this case, a small-diameter annular water pipe and a large-diameter annular water pipe face each other at both the front and rear ends, and between the two annular water pipes, there is a connecting pipe whose both ends communicate with both the annular water pipes, and one end of which is connected to the small-diameter annular water pipe. Heating formed by horizontally connecting a connecting pipe that communicates with each other and whose other end is closed on the large-diameter annular water pipe side, and a connecting pipe whose one end is closed on the small-diameter annular water pipe side and whose other end communicates with the large-diameter annular water pipe. The pipe body is housed in the spiral water pipe such that the small-diameter annular water pipe side is located on the small-diameter side of the spiral water pipe, and the small-diameter annular water pipe is connected to a hot water discharge pipe that communicates with the water chamber, while the large diameter of the spiral water pipe One end of the section side is connected to a water conduit pipe communicating with the water pipe, and the one end of the small diameter section side is connected to the small diameter annular water pipe. 2. A smoke chamber is provided at the top of the combustion chamber, a water chamber is provided around the combustion chamber and the outside of the smoke chamber, and a cone-shaped spiral water pipe is placed horizontally within the combustion chamber so as to surround the combustion flame of the burner. A small-diameter annular water pipe and a large-diameter annular water pipe face each other at both front and rear ends, and between both annular water pipes, there is a connecting pipe whose both ends communicate with both annular water pipes, and one end communicates with the small-diameter annular water pipe and the other end. A heating tube formed by horizontally connecting a connecting pipe whose one end is closed on the side of the large-diameter annular water pipe and a connecting pipe whose one end is closed on the side of the small-diameter annular water pipe and whose other end communicates with the large-diameter annular water pipe is connected to the small-diameter annular water pipe. The water pipe side is housed in the spiral water pipe so that it is located on the small diameter side of the spiral water pipe, and the small diameter annular water pipe is connected to a hot water discharge pipe that communicates with the water chamber, while one end of the spiral water pipe on the large diameter side is housed in the spiral water pipe. The water pipes communicating with the chamber are connected, and one end of the small-diameter side is connected to the small-diameter annular water pipe, and a plurality of heat-absorbing pipes are horizontally hung in a row in the smoke chamber in multiple stages in the vertical direction. In this hot water boiler, each heat absorption pipe is arranged in stages, one end of which communicates with a water pipe, the other end of which is closed, and the closed end is slightly inclined upward.