JPH0345811A - Device for preventing entry of rainwater into chimney - Google Patents

Abstract

PURPOSE:To easily prevent the entry of rainwater into a chimney and hence heighten its durability by providing a cover and a means for opening and closing it, said cover being held freely rotatable on a rotational axial pin held horizontally at the top of the chimney shell and designed to cover the outlet of the chimney. CONSTITUTION:A rainwater-entry-preventing device 1 comprises one pair of rotational axial pins 2 provided horizontally close to the top edge of a chimney 100 having a lining material and the like on the inner side, one pair of covers 3 held freely rotatable respectively on rotational axial pins 2, one pair of upper pulleys 4 for opening and closing the covers 3, an intermediate pulley 5, a lower pulley 6, wire ropes 7 each of which has one end fixed to one of the covers 3 with the help of the pulleys 4, 5, 6 and which open and close the covers 3, and a winch 8 on which to wind the wire ropes 7. When the furnace is in operation, the rainwater-entry-preventing device 1 is designed to extend the wire ropes 7 to keep the covers 3 open; whereas, when the furnace is at rest, the device covers the outlet of the chimney 100 with the covers 3 by drawing back the wire ropes 7 by the rotation of the winch 8 turning the covers 3 on the rotational axial pins 2.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is applicable to chimneys, especially garbage incinerators, which are relatively often out of service, so there are many opportunities for rainwater to enter the chimney during the outage. Regarding a device to prevent rainwater from entering a chimney.

[Prior art] In chimneys, such as garbage incinerators in incineration plants, which are relatively often out of operation and the combustion exhaust gas does not pass through the chimney for a long time, if it rains while the incinerator is out of operation, the inside of the chimney will Rainwater intrudes. The rainwater then reacts with harmful components such as HCl-3Ox and NOx in the exhaust gas adhering to the inner wall of the chimney, producing acids. This acid corrodes the lining material on the inside of the chimney and the steel that makes up the chimney body, significantly reducing the durability of the chimney.Measures are not taken to prevent rainwater from entering the chimney when the furnace is shut down. is necessary.

Conventionally, measures to prevent rainwater from entering the chimney as described above include covering the top of the chimney with a waterproof sheet each time the furnace is shut down,
The chimney outlet was covered with a wooden lid, etc.

[Problem U to be solved by the invention] However, the above-mentioned conventional measures to prevent rainwater intrusion do not solve the problem.
Because it involves working at heights, it is extremely dangerous for workers, and requires a great deal of time and effort, so it is not widely used in practice, and measures to prevent rainwater from entering have not been perfect.

This invention solves the above-mentioned problems of the prior art,
The object of the present invention is to provide a device for preventing rainwater from entering a chimney, which can safely and easily take measures to prevent rainwater from entering a chimney.

[Means for Solving the Problems] A device for preventing rainwater from entering a chimney according to the present invention includes a rotary shaft provided horizontally at the top of the chimney shell, and a chimney rotatably supported on the rotary shaft. This is a device for preventing rainwater from entering a chimney, which is comprised of a lid configured to cover the discharge port of the chimney, and an opening/closing means for opening and closing the lid.

[Effect] A device for preventing rainwater from entering a chimney according to the present invention.

A rotary shaft provided horizontally on the top of the chimney shell, a lid rotatably supported on the rotary shaft and configured to cover the chimney outlet, and a lid for opening and closing the chimney. It consists of an opening/closing means. If the opening/closing means is configured so that it can be remotely controlled from the ground, a worker can operate the opening/closing means from the ground when the reactor is out of operation, rotate the lid, and cover the chimney outlet with the lid. I can do it. Therefore, it is possible to safely and easily prevent rainwater from entering the chimney.

[Example] The device for preventing rainwater intrusion into a chimney according to Example 1 of the present invention was
This will be explained with reference to FIGS. Fig. 1 is a side view showing the open state of the device for preventing rainwater intrusion into the chimney according to one embodiment of the present invention, and Fig. 2 shows the state in which the device for preventing rainwater intrusion into the chimney of the present invention is closed. Side view shown, No. 35! i is a view taken along arrow A-A in Figure 2, Figure 4 is a view taken along arrow B-B in Figure 2, Figure 5 is a view viewed along arrow C-C in Figure 3, and Figure 6 is a view taken along arrow C-C in Figure 3. FIG.

A device 1 for preventing rainwater from entering a chimney according to an embodiment of the present invention includes a pair of rotating shafts 2 horizontally provided near the top of a chimney 100 whose interior is made of a lining material, etc. A pair of lid bodies 3 rotatably supported by a shaft, a pair of upper pulleys 4, intermediate pulleys 5, and lower pulleys 6 for opening and closing the lid bodies 3, and one end attached to each lid body 3. It is composed of a wire rope 7 which is fixedly fixed to open and close the lid body 3 via pulleys 4.5 and 6, and a winch 8 which winds up the wire rope 7.

To explain in detail the lid 3 of the device 1 for preventing rainwater from entering a chimney according to one embodiment of the present invention, the lid 3 is composed of upper members 9 and 10 and a side plate 11, as shown in FIG. 2
A drainer 12 is provided at either end of the upper member 10 where the two lids 3 come into contact, to prevent rainwater from entering the chimney from the contact surface of the two lids 3. A through hole 13 is provided at the lower end of the side plate 11, and the lid body 3 is rotatably supported by the through hole 13 on the rotation support shaft 2. Further, a pin 14 is provided on the side plate 11, and the wire row 17 is secured to the pin 14. The center of gravity of the lid 3 supported by the rotation support shaft 2 is located outside of the rotation support shaft 2.
In other words, since it is configured to be on the side away from the center of the chimney 100, when the wire rope 7 is not under tension, the lid 3 is placed on the side away from the chimney 100 as shown in FIG.
When the lid holder is rotated outward, the holder is stopped by a member 15. Each member including the lid 3 described above is made of a material that is resistant to corrosion against the exhaust gas passing through the chimney 100, such as 5US3Q4 stainless steel.

The apparatus 1 for preventing rainwater from entering a chimney according to one embodiment of the present invention, configured as described above, is configured so that the wire rope 7 is loosened and the lid 3 is left open as shown in FIG. 1 during the operation of the furnace. However, when the furnace is stopped, the winch 8
Rotate the wire rope 7 in the direction of the arrow shown in ■, and
The wire rope 7 is pulled in the direction of the arrow shown in FIG. do.

Also, when restarting the furnace operation, rotate the winch 8 in the opposite direction to the direction of the arrow shown in
If the tension of the wire rope 7 applied to the lid body 3 is eliminated by loosening the lid body 3, the lid body 3 will rotate to be located outside the chimney 100 due to its own weight.

The device for preventing rainwater intrusion into a chimney according to one embodiment of the present invention can be opened and closed on the ground as described above, so it is easy to open and close and can be operated safely.

The device for preventing rainwater from entering a chimney according to the first embodiment of the present invention has been described with reference to two lids and a combination of a winch and a wire lobe as means for opening and closing the lids; however, the present invention is not limited to this. Instead, the number of lids may be one, and the means for opening and closing the lid may be appropriately selected according to the conditions of the furnace equipment, such as one that can be remotely controlled using an electric motor or the like. In this embodiment, wire ropes are provided on both sides, but they may also be provided on only one side.

[Effects of the Invention] According to the present invention, rainwater can be safely and easily prevented from entering the chimney, and the durability of the chimney can be improved.

[Brief explanation of drawings]

Fig. 1 is a side view showing the open state of the device for preventing rainwater intrusion into the chimney according to one embodiment of the present invention, and Fig. 2 shows the state in which the device for preventing rainwater intrusion into the chimney of the present invention is closed. 3 is a side view taken along arrow A-A in FIG. 2, and FIG. 4 is a view taken along B-A in FIG.
5 is a view taken along the line C-C in FIG. 3, and FIG. 6 is a perspective view of one side of the lid. DESCRIPTION OF SYMBOLS 1... Device to prevent rainwater from entering the chimney, 2... Rotating shaft, 3... Lid body, 4, 5.6... Pulley, 7... Wire robe, 8... Winch.

Claims (1)

[Claims] A rotary shaft provided horizontally on the top of the chimney shell, a lid rotatably supported on the rotary shaft and configured to cover the chimney outlet, and a lid for opening and closing the chimney. A device for preventing rainwater from entering a chimney, comprising an opening/closing means.