JP2002089836A - Monitor device for interior of furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a heat insulating performance in an opening part of a furnace casing wall. SOLUTION: In the furnace casing wall 1, the opening part 9 passing through a casing 3 and a heat insulating material 4 is provided. A rotary member 10 whose diameter is larger than the thickness of the furnace casing wall 1 is provided with a slit hole 11 diametrically passing through the furnace casing wall. The rotary member 10 is fitted to the opening part 9 while the rotary member protrudes both inside and outside the furnace casing wall 1 and supported by a bearing 13 having a shaft 12 provided on the furnace casing wall 1. As a rotary means 14, a lever 16 moving vertically along a guide groove 15 provided in the outer side surface of the furnace casing wall 1 is connected to the shaft 12. Heat resisting glass 18 is provided for covering the part of the rotary member 10 exposed to the external part of the furnace casing wall 1 therewith and closing the opening part. When the interior of a furnace casing is not monitored, the slit hole 11 is vertically arranged in parallel with the furnace casing wall 1. When the interior of the furnace casing is monitored, the rotary member 10 is rotated to direct the slit hole 11 in the internal and external directions of the furnace casing wall 1 to monitor the interior through the heat resisting glass 18 and the slit hole 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-furnace monitoring device for visually confirming a combustion state inside a furnace body from the outside of the furnace body. It relates to a monitoring device.

[0002]

2. Description of the Related Art For example, in a heating furnace such as a boiler, gas and oil are burned in a furnace by a burner, and the generated heat of combustion is used to heat other gases and fluids. Since the temperature inside the furnace becomes as high as 800 to 1000 ° C., usually, the furnace body wall is constituted by attaching a heat insulating material to the entire inner surface of the steel plate casing, and the heat inside the furnace body is transmitted to the casing to increase the temperature. And heat radiation to the outside can be prevented.

In the above-mentioned heating furnace, it is necessary to visually monitor the combustion state inside the furnace body from the outside. For this reason, as shown in FIG. 3, a furnace body wall 1 for observing a burner (not shown) inside the furnace body is required. Is provided with a furnace monitoring device 2 such as a viewing window at a required position.

As shown schematically in FIG. 3, the furnace monitoring apparatus 2 has an opening 5 penetrating through a casing 3 and a heat insulating material 4 in a furnace body wall 1, and has an opening 5 at the position of the opening 5. A frame member 6 is attached to the casing 3, a heat-resistant glass 7 is fitted into the frame member 6 to form a viewing window, and the heat-resistant glass 7 is closed so that the opening 5 can be closed except when monitoring is performed. A shielding plate 8 made of a steel plate is attached to an upper end portion of the frame member 6 at a position near the inside of the furnace so as to be vertically tiltable via a hinge (not shown). To operate, for example,
As a configuration in which a tilting device (not shown) such as a lever is connected, the opening 5 is normally shielded by the shielding plate 8 as shown by a solid line in FIG.
By operating the tilting device on the outside of the furnace body, as shown by a two-dot chain line in FIG. 3, the opening 5 is opened by tilting the shielding plate 8 upward so that the inside of the furnace can be monitored. is there. In addition, the heat insulating material 4 on the periphery of the opening 5 has a notched inner corner portion so that the field of view can be widened.

[0005]

However, in the conventional furnace monitoring apparatus 2, the heat insulating material 4 at the position of the opening 5 is not provided, and the heat insulating material 4 is notched even at the peripheral edge thereof by cutting off the inner corner portion. Therefore, there is a problem that heat insulation is insufficient in structure, the heat-resistant glass 7 and the casing 3 around the opening 5 become hot, and the deterioration proceeds, and the amount of heat released outside the furnace body also increases. As a result, the fuel efficiency of the device deteriorates,
There are also economic problems.

Accordingly, the present invention provides a furnace having a heat insulating structure sufficient to prevent the heat-resistant glass and casing disposed at the opening of the furnace body wall from becoming high in temperature and to reduce the amount of heat radiation. It is intended to provide an internal monitoring device.

[0007]

According to the present invention, in order to solve the above-mentioned problems, the casing and the heat insulating material are penetrated to a required position of a furnace body wall provided with a heat insulating material on an inner surface of a casing made of a steel plate. A rotating body made of a heat insulating material, which is formed in a cylindrical shape having a diameter larger than the thickness of the furnace body wall and is provided so as to penetrate the slit hole in the diametrical direction, is provided in the opening of the furnace body. It is arranged so as to fit and rotatably supported on the furnace body wall, and at the outer end of the opening, while covering the rotating body from the outside of the furnace body, provided with heat resistant glass for closing the opening, A rotating means for rotating the rotating body from outside the furnace body is provided, and the rotating body is rotated so that the direction of the slit hole is arranged in a vertical direction substantially parallel to the furnace body wall, and is directed inward and outward of the furnace body wall. A structure that can be freely changed between the horizontal arrangement To.

When the inside of the furnace is not monitored, if the rotating body is rotated so that the slit holes are arranged in the vertical direction substantially parallel to the furnace body wall, the opening is closed by the rotating body made of heat insulating material. Become like When the inside of the furnace is monitored, the inside of the furnace can be observed from the outside through the slit holes by arranging the slit holes in the lateral direction facing the inside and outside of the furnace body wall. At this time, since the slit hole is narrow,
Since the amount of heat passing through the slit hole is limited to a small amount, the opening always has high heat insulating performance.

In addition, a rotating means is connected to a shaft protruding at the axial center position of the longitudinal end of the rotating body, and the lever is provided on the outer surface of the furnace body wall so as to extend vertically. With the configuration extending to the outside of the furnace body through the guide groove, the rotating body can be easily rotated from the outside of the furnace body by operating the lever, and the angle of the slit hole can be easily changed. .

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 (a), (b) (c) and FIG. 2 (a)
(B) shows an embodiment of the in-furnace monitoring apparatus according to the present invention, in which a casing 3 and a heat insulating material 4 are penetrated at required positions of a furnace body wall 1 having a configuration similar to that shown in FIG. An opening 9 is formed, and a heat-insulating material is formed into a cylindrical shape so as to have a diameter larger than the thickness of the furnace body wall 1, and a slit hole 11 penetrating through the axial center portion over substantially the entire length is formed, for example. A rotating body 10 having a width of about 10 mm and provided in a direction perpendicular to the axial direction is disposed laterally so as to fit inside the opening 9, and the rotating body 10 is attached to the furnace body wall 1. The shaft 12 projecting at the axial center positions of both ends in the longitudinal direction of the rotating body 10 is connected to the furnace body wall 1 at the left and right sides of the opening 9.
Bearing 13 arranged so as to be buried in heat insulating material 4 at an intermediate position of
And the bearings 13 are fixed to the inner surface of the casing 3. Further, as the rotating means 14 for rotating the rotating body 10, the left and right shafts 1 are used.
2, one of the shafts 12 (on the right side in the figure) is made to protrude from the bearing 13 and the protruding end of the shaft 12 is
A lever 16 extending outwardly from the furnace body is connected through a guide groove 15 provided on the outer surface of the furnace so as to extend in the vertical direction. By operating the lever 16 in the vertical direction, the rotating body 10 is moved up and down through the shaft 12. Direction, so that
The angle of the slit holes 11 can be freely changed from a vertical arrangement substantially parallel to the furnace body wall 1 to a horizontal arrangement that allows the inside and outside of the furnace body wall 1 to communicate with each other.

Further, the furnace body wall 1 of the rotating body 10 is provided on the outer surface of the casing 3 on the left and right sides of the opening 9.
A Vycor curved in the vertical direction so as to project a substantially semicircular glass fixing member 17 in accordance with the cross-sectional shape of the portion exposed more outward, and to connect the protruding ends of the left and right glass fixing members 17. A heat-resistant glass 18 such as glass is attached to cover the exposed portion of the rotating body 10 outside the furnace body wall 1 and close the opening 9.

The casing 3 at the periphery of the opening 9 is provided with a heat-resistant seal (not shown) that slides on the outer peripheral surface of the rotating body 10 and both end surfaces in the longitudinal direction. or,
FIG. 1A shows a state in which the heat-resistant glass at the right end is cut.

Next, a method of operating the above furnace monitoring device will be described with reference to FIGS. First, during the operation of the heating furnace, when not monitoring the inside of the furnace,
As shown in FIG. 2A, the rotating body 10 is rotated by operating the lever 16 from the outside of the furnace body, and the slit holes 11 are arranged substantially vertically to the wall of the furnace body. Thus, the opening 9 is closed by the rotating body 10.

In order to monitor the inside of the furnace, as shown in FIG. 2B, the rotating body 10 is rotated counterclockwise by a required angle by operating the lever 16 so that the slit hole 1 is rotated.
1 is changed so that the inside and outside of the furnace body wall 1 communicate with each other by changing the angle of the furnace body wall 1. The exposed portion of the rotating body 10 to the outside of the furnace body wall 1 is covered with the heat-resistant glass 18 so that the inside of the furnace can be monitored from outside the furnace body through the heat-resistant glass 18 and the slit hole 11 of the rotating body 10. Become. At this time, by adjusting the rotation angle of the rotating body 10, the angle of the slit hole 11 is changed from a state in which the inside of the furnace is downward as shown by a solid line in FIG. Since the angle can be freely changed to a state in which the inside of the furnace is directed upward as shown by, the viewing angle can be widened in the vertical direction.

As described above, when the inside of the furnace body is not monitored, the opening 9 of the furnace body wall 1 is closed by the rotating body 10 made of a heat insulating material. On the other hand, when the inside of the furnace body is monitored, Since the monitoring is performed only through the narrow slit holes 11, high heat insulating performance of the rotating body 10 can always be obtained with respect to the opening 9 of the furnace body wall 1, so that the heat insulating material can be obtained. It is possible to prevent the temperature of the heat-resistant glass 18 and the casing 3 around the opening 9 from becoming high.
The deterioration of the heat-resistant glass 18 and the casing 3 can be prevented, and the amount of heat radiation can be reduced as compared with the conventional furnace monitoring device 2.

The present invention is not limited to the above embodiment. For example, as the rotating means 14, a lever 16 is connected to the shaft 12, and the lever 12 is moved up and down along the guide groove. Although shown as a configuration,
If the rotating body 10 can be rotated so that the angle of the slit hole 11 can be changed from the vertical arrangement substantially parallel to the furnace body wall 1 to the horizontal arrangement facing the inside and outside of the furnace body wall 1, the rotating body 10 And a method in which a ring gear is attached to the rotating body 10 or the shaft 12 and a pinion that meshes with the ring gear is operated from the outside of the furnace body. Needless to say, it can be similarly installed and used in other types of combustion furnaces other than the heating furnace, and various changes can be made without departing from the gist of the present invention.

[0018]

As described above, according to the in-furnace monitoring apparatus of the present invention, the casing and the heat insulating material penetrate into the required position of the furnace body wall provided with the heat insulating material on the inner surface of the steel sheet casing. A rotating body made of a heat insulating material, which is formed in a cylindrical shape having a diameter larger than the thickness of the furnace body wall and is provided so as to penetrate the slit hole in the diametrical direction, is provided in the opening of the furnace body. It is arranged so as to fit and rotatably supported on the furnace body wall, and at the outer end of the opening, while covering the rotating body from the outside of the furnace body, provided with heat resistant glass for closing the opening, A rotating means for rotating the rotating body from outside the furnace body is provided, and the rotating body is rotated so that the direction of the slit hole is arranged in a vertical direction substantially parallel to the furnace body wall, and is directed inward and outward of the furnace body wall. With a configuration that can be freely changed between horizontal arrangement and Therefore, when the inside of the furnace is not monitored, the rotating body is rotated so that the slit holes are arranged in the vertical direction substantially parallel to the furnace body wall, and the opening is closed by the rotating body. In the case of monitoring, the slit holes are arranged in the lateral direction facing the inside and outside of the furnace body wall,
The inside of the furnace can be observed from the outside through the slit holes. At this time, the heat insulating material of the rotating body is always present with respect to the opening of the furnace body wall, and even when observing inside the furnace, through the narrow slit holes. Since it is possible to limit the amount of heat released, it is possible to always obtain high heat insulating performance in the opening,
Therefore, it is possible to prevent the temperature of the heat-resistant glass and the casing around the opening from becoming high, prevent the heat-resistant glass and the casing from deteriorating, and reduce the heat radiation to the conventional furnace monitoring device. The rotating means is connected to a shaft protruding at the axial center of the longitudinal end of the rotating body, and the lever is connected to the furnace body. By having a configuration that extends outward from the furnace body through a guide groove provided to extend in the vertical direction on the outer surface of the wall, the rotating body can be easily rotated from the outside of the furnace body by operating the lever, The effect that the angle of the slit hole can be easily changed is exhibited.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a furnace monitoring apparatus of the present invention, in which (a) is a partially cutaway schematic front view, (b) is a view taken in the direction of arrow AA in (a), and (c). () Is a view in the direction of arrows BB in (A).

FIGS. 2A and 2B are schematic sectional side views showing a method of using the apparatus of FIG. 1, wherein FIG. 2A shows a state in which monitoring inside the furnace is not performed, and FIG. 2B shows a state in which monitoring inside the furnace is performed. .

FIG. 3 is a cut-away side view schematically illustrating an example of a conventional furnace monitoring apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Furnace body wall 3 Casing 4 Heat insulating material 9 Opening 10 Rotating body 11 Slit hole 12 Axis 14 Rotating means 15 Guide groove 16 Lever 18 Heat resistant glass

Claims (2)

[Claims] An opening penetrating the casing and the heat insulating material is provided at a required position of a furnace body wall provided with a heat insulating material on the inner surface of a steel plate casing, and the diameter of the opening is larger than the thickness of the furnace body wall. A rotating body made of a heat insulating material having a large cylindrical shape and provided so as to penetrate the slit hole in the diameter direction is arranged so as to fit into the opening of the furnace body and rotatably supported on the furnace body wall. An outer end portion of the opening, which covers the rotating body from outside the furnace body, includes heat-resistant glass for closing the opening, and further includes a rotating unit for rotating the rotating body from outside the furnace body. A configuration in which the rotating body is rotated so that the orientation of the slit holes can be freely changed between a vertical arrangement substantially parallel to the furnace wall and a horizontal arrangement facing the inside and outside of the furnace wall. An in-furnace monitoring device comprising: 2. A rotating means is connected to a shaft protruding at an axial center position of a longitudinal end of the rotating body, and the lever is provided on the outer surface of the furnace body wall so as to extend vertically. 2. The in-furnace monitoring device according to claim 1, wherein the in-furnace monitoring device is configured to extend outside the furnace body through the guide groove.