JPH0349010B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a water tube boiler used for hot water supply.

Conventional structure and its problems Conventionally, this type of water tube boiler has a plurality of water tubes 3 between the upper and lower annular headers 1 and 2, as shown in Fig. 1.
were installed in a ring shape to form a heat exchanger.
The combustion gas combusted by the burner 4 was flowing between the water pipes 3 of the buttful 5 according to the arrow A. On the other hand, water supplied from the water supply port 6 passes through the water pipe 3 according to arrow B, and is supplied from the hot water supply port 7. In this configuration, the passage resistance of the combustion gas passage 8 between the water pipes 3 is small, so that the heat exchange efficiency is low. In addition, due to the heat shield 5, the temperature of the heat shield near the bottom of the heat shield 9 where the combustion flame touches the heat shield 9 becomes 400 to 500°C, and it is necessary to improve the insulation performance of the heat insulating material 10 covering the outside of the heat shield 9. It had problems such as lack of durability and reliability.

Purpose of the invention The present invention solves such conventional problems,
The purpose is to improve durability, reliability, and heat exchange efficiency.

Structure of the Invention In order to achieve this object, the present invention has a plurality of water pipes erected in a ring shape between upper and lower annular headers, and a baffle plate is inserted into the gap between the water pipes.

With this configuration, the passage resistance of combustion gas near the water pipe increases, heat exchange efficiency improves, and the temperature of the heat shield plate decreases, improving the reliability of the equipment.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

A plurality of water pipes 3 are erected in a ring shape between upper and lower annular headers 1 and 2. Upper and lower annular header 1,
A heat exchange chamber is formed by a heat shield plate 4 and a baffle 5 provided concentrically with respect to the heat exchanger 2. In addition, a baffle plate 7, which is rotatably connected to the annular band 6 concentric to the upper and lower annular headers 1 and 2, is inserted into the gap between each water pipe 3 from the inside of the upper annular header 1. .

The combustion gas combusted in the burner 9 at the bottom of the combustion chamber 8 passes through the combustion gas passage 10 formed by the heat shield plate 4, the baffle 5, the water pipe 3, and the baffle plate 7 according to the arrow A, passes through the exhaust cover 11, and is discharged into the atmosphere. is discharged inside.

On the other hand, the flow on the water side follows arrow B, and the water inlet 12
After being supplied with water, the hot water rises in the water pipe 3, exchanges heat with the combustion gas, and is discharged from the hot water supply port 12.

In the heat exchange chamber, the combustion gas rises around the water pipes 3 in a turbulent state due to the baffle plate 7, thereby improving heat exchange efficiency.

Further, the baffle plate 7 is connected to the annular band 6 so as to be rotatable left and right, and is inserted into the gap between the respective water pipes 3 from inside the upper annular header 1, so that it can be easily removed.

Effects of the Invention According to the water tube boiler of the present invention, the following effects can be obtained.

(1) High heat exchange efficiency can be obtained.

By inserting a baffle plate into the gap between the water tubes, the combustion gas rises around the water tubes in a turbulent state, improving the efficiency of heat exchange with the combustion gas.

(2) The baffle plate can be easily removed.

Since the baffle plate is connected to the annular band so that it can rotate left and right, it can be easily inserted from the inside of the upper annular header into the gap between the groups of water pipes that are erected to have a concentric circle larger than the inner diameter of the upper annular header. It can be removed.

(3) High reliability can be obtained.

The baffle plate provides high heat exchange efficiency, lowers the temperature of the combustion gas, and reduces the temperature rise of the heat shield plate forming the outer periphery of the heat exchange chamber as the straight portion of the lower part of the baffle plate receives the flame. Further, since combustion is completed at the lower part of the baffle plate where the temperature rises due to direct flame, generation of unburned gas and medium can be prevented.

[Brief explanation of drawings]

FIGS. 1A and 1B are a vertical sectional view and a horizontal sectional view of a conventional water tube boiler, and FIGS. 2A and 2B are a vertical sectional view and a horizontal sectional view showing an embodiment of the water tube boiler of the present invention. 1... Upper annular header, 2... Lower annular header, 3
...Water pipe, 6...Annular band, 7...Baffle plate.

Claims (1)

[Claims] 1 A plurality of water pipes are installed in a ring shape between the annular headers placed above and below, and a baffle plate attached to the annular band placed above the upper annular header is installed in the gap between each water pipe. A water tube boiler inserted from inside the annular header.