JPH0140963Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a viewing window for a coal-fired boiler, a co-fired coal boiler with heavy oil, etc.

As shown in FIGS. 1 and 2, the conventional viewing window has an arm 01 on which a fireproof material 04 is attached to the front plate 0.
5 with a left or right pin 02, and the opposite side of the arm 01 is fixed with a handle 03.

However, in coal-fired boilers, coal ash accumulates in the space around the viewing window, so each time the viewing window is opened or closed to the left or right to inspect the inside of the furnace, coal ash falls or scatters outside the furnace, causing the area around the boiler to become noticeably It has the disadvantage of getting dirty.

The present invention aims to improve the above-mentioned drawbacks and to prevent coal ash from falling or scattering outside the furnace without adding extra items or parts.

This invention shifts the position of the conventional opening/closing base point (pin) and handle by 90 degrees, making the opening/closing base point at the bottom and the handle at the top, and the structure of the lower part of the viewing window is square. The gap between the holder and the seal box is minimized.

The present invention will be explained with reference to the embodiment shown in Figs. 3 to 5. A cover 1 is integrated with an arm 2 by bolts, and an insulation holder 5 is attached to the inside of the boiler by welding. A viewing window refractory material 10 is injected to form a viewing window cover.
The upper part of the insulation holder has an acute angle.

The upper end of arm 2 is connected to handle 6 via pin B7.
is attached and serves as a latch mechanism to be hooked to the frame 3 side.

The lower end of the arm 2 is pivotally connected to the frame 3 side with a pin A4. The frame 3 is fixed to the front plate 12 with studs 9, and is kept sealed to the cover 1 with a gasket 8. Also, insulation holder 5
The lower part is square, sealed box fireproof material 11
Leave a gap of 2 to 3 mm.

Operate the handle 6, unlatch arm 2 from frame 3, and pull it toward you, arm 2 will move to pin A.
The viewing window cover is opened by rotating downward from point 4.

Conventionally, the viewing window cover was opened and closed by turning it to the left or right, but with this method, if the lid was opened even slightly, the coal ash that had accumulated mainly at the bottom of the viewing window would fall out of the furnace. Of course, the inside of the furnace is under negative pressure, so after opening the lid to some extent to let in some air, the ash will fall into the furnace.

However, until the lid is first opened and the amount of coal ash falling outside the furnace is reduced and balanced, the amount of coal ash falling outside the furnace cannot be ignored, and since there are many viewing windows, monitoring inside the furnace is Since this condition continues every time, the entire boiler becomes dirty. Due to this condition, the number of times the inside of the furnace is monitored is extremely reduced, and the viewing window no longer fulfills its original role.

The present invention prevents ash from falling to the outside by setting the opening/closing point of the viewing window cover at the bottom and opening and closing it up and down, and by making the shape of the upper part of the insulation holder 5 of the viewing window an acute angle. In this case, even if the coal ash is deposited in the center of the bottom half of the viewing window, or in extreme cases all over, if the top of the lid is slightly opened to let air in, the deposited ash will fall into the furnace one by one. Almost no amount falls outside the furnace.

Next, for the operability of opening and closing the viewing window cover, it is necessary to support the weight of the cover. However, it is not heavy, and the viewing window of the negative pressure boiler can be closed at any time, so it is not a big burden.

Furthermore, the lower part of the insulation holder 5 is square and has a gap of 2 to 3 with the seal box refractory material 11.
Since the diameter is small, less ash accumulates at the bottom inside the viewing window.

[Brief explanation of the drawing]

Figure 1 is a side sectional view of a conventional viewing window, Figure 2 is a front view of the same, Figure 3 is a partially sectional side view of the viewing window of the present invention, Figure 4 is a front view of the same, and Figure 5 is an interior view of the viewing window. FIG. 3 is a perspective view of the compression holder. 1...Cover, 2...Arm, 3...Frame, 4...Pin A, 5...Insulation holder, 6...Handle, 7...Pin B, 10...
Peephole fireproof material, 11... Seal box fireproof material.

Claims (1)

[Scope of utility model registration request] The lower end of the arm is pivotally attached to the frame, the upper end of the arm is attached to the frame by a handle, a cover is fixed to the center of the arm, and the upper part of the slanted insulation holder and the lower part of the rectangular insulation holder are attached to the cover. A boiler viewing window that supports the viewing window refractory material with a gap of 2 to 3 mm between the lower insulation holder and the seal box refractory material.