JPS60200048A - Water tube boiler - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial applications 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 heat exchanger with a plurality of water tubes 3 erected in a ring shape between the upper and lower annular headers 1.2, as shown in Fig. 1. It consisted of

The combustion gas combusted by the burner 4 was flowing between the baffle 5, the heat shield plate 6, and the water pipe 3 according to the arrow A.

Further, a cylinder 9 was connected between the lower annular pipe 2 and the top plate 7 via a packing 8 to seal combustion gas. On the other hand, water supplied from the water supply port 10 passes through the water pipe 3, the ring-shaped pipe 1, and the mixing tank 11 according to the arrow B, and is then supplied to the hot water supply port 12.

In this configuration, the cylinder 9 for sealing combustion gas needs to be inserted from above in order to be connected and fixed to the lower annular pipe 2. In order to increase the tank capacity, the mixing tank 11 provided outside the cylinder 9 needs to be connected to the stop ring pipe 1 via the cylinder 9, and this connection must be sealed against water and combustion gas.

For this purpose, a flange 14 is provided at the end of the pipe 13 that connects to the stop ring pipe 1, and is fixed to the cylinder 9 via a packing 8 to seal the combustion gas.
The pipe 15, whose tip is flared, is connected to the water connector 14 through the seal 8, making the sealing structure complicated, resulting in problems such as combustion gas leaks, water leaks, and durability.
Reliability decreased. Furthermore, when the cylinder 9 is removed, the mixing tank 11 also has to be removed from the flange 14.

OBJECT OF THE INVENTION The present invention solves such conventional problems, and improves durability,
The purpose is to improve reliability and maintainability.

Structure of the Invention In order to achieve this object, the present invention has a heat exchanger in which a plurality of water pipes are arranged in a ring shape between upper and lower annular headers, and a heat exchanger in which a plurality of water pipes are arranged concentrically with respect to the heat exchanger on the upper part. A combustion gas passage is formed by connecting the cylinder that surrounds the mixing tank provided, the disk that covers the top of the cylinder and has a passage port for the hot water pipe coming out of the mixing tank, and the disk and the top plate of the exterior. The small cylinder seals the combustion gas in the heat exchanger section.

This configuration simplifies the combustion gas seal configuration.
This improves the reliability and maintainability of the equipment.

Description of examples An embodiment of the present invention will be described below with reference to FIG.

A heat exchange chamber is formed by a heat exchanger in which a plurality of water pipes 3 are installed in a ring shape between the upper and lower annular headers 1.2, and a heat shield plate 4 and a panfur 5 provided concentrically with respect to this heat exchanger. is formed.

The combustion gas combusted in the burner 7 at the bottom of the combustion chamber 6 passes between the water pipe 3, the heat shield plate 4, and the baffle 5 in accordance with the arrow A, and is connected to the disk 8 to form a small cylinder forming a combustion gas passage 9. 10 and is discharged into the atmosphere through an exhaust port in the top plate 11.

On the other hand, the flow on the water side follows arrow B, and water is supplied from the water supply port 13, ascends in the water pipe 3, exchanges heat with the combustion gas, and then passes through the mixing tank 14 to reduce fluctuations in hot water temperature.
Hot water is discharged from a hot water supply port 16 via a hot water supply pipe 15 .

A heat exchanger and a mixing tank 14 concentric with the heat exchanger are surrounded by a cylinder 17, and the upper part thereof is covered with a disk 8. Hot water pipe 15 is connected to this disc 8.
The small cylinder 10 is connected to an exhaust port 12 on a top plate 11 of the exterior. Each connection can be easily sealed from combustion gas with insulating gaskets, improving equipment reliability and maintenance.

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

(1) The seal structure for combustion gas and water is simple and the reliability of the equipment is improved.

There are no gasket connections in the water circuit, and the combustion gas seal has a simple configuration that connects cylinders, disks, and small cylinders, improving the reliability of the equipment.

In addition, when adding a thermometer for detecting hot water temperature to the mixing tank, by sealing the combustion gas through the thermometer passage port of the disk with a gasket, heat resistance measures for the thermometer lead wire are not required.

(2) Improved maintainability.

There is no mutual interference between the water circuit and the combustion gas seal parts, and the combustion gas seal parts can be easily installed and removed.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a conventional water tube boiler, and FIG. 2 is a longitudinal sectional view showing an embodiment of the water tube boiler of the present invention. 1... Stop annular header, 2... Lower annular header, 3... Water pipe, 8... Disk, 9.
... Combustion gas passage, 10 ... Small cylinder, 1
1... Top plate, 14... Calculating tank, 15... Hot water pipe, 17... Cylinder. Name of agent: Patent attorney Toshio Nakao and 1 other person 1st
(!l Figure 2 6 ′/

Claims (1)

[Claims] A heat exchanger with a plurality of water pipes standing in a ring shape between the annular headers placed above and below, a cylinder surrounding the mixing tank connected to the top of this heat exchanger, and a cylinder that covers the top of the heat exchanger. The combustion gas 7 in the heat exchanger section is controlled by a disc having a passage port for the hot water pipe connected to the mixing tank, and a small cylinder connecting the disc and the top plate of the exterior to form a combustion gas passage. Torpedo boiler.