JPS5928319Y2 - Insulation block for water-cooled pipes in high-temperature reactors - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a heat insulating block for water cooling pipes in a high temperature reactor.

It is well known that various proposals have been made as heat insulating linings for in-furnace water cooling pipes, such as double heat insulating linings made of ceramic fibers and castables, and all-fiber heat insulating linings.

In these methods, a heat-resistant stud is welded to a water-cooled pipe, the stud is used as a supporting member, and the water-cooled pipe is coated with ceramic fiber or castable to form a heat insulating lining.

Although this method has improved the insulation to a somewhat satisfactory level, there are difficulties in lining construction.

Recently, in order to solve these construction difficulties, a technique has been proposed and known in which a semicircular heat insulating block is formed in advance and the block is arranged in a water cooling pipe.

This will be explained based on FIGS. 1 to 6. FIG. 1 is an external view showing the shape of the heat insulating block, which is formed in a semicircular shape, and dowels 2 are provided at both ends of the semicircle so that it engages with a pair of heat insulating blocks through dowel grooves.

A protrusion 3 is formed on the inner surface of the heat insulating block 1, and a band 4 is disposed on the protrusion 3.

FIG. 2 is a cross-sectional view taken along the line A--A in FIG. 1, and shows a heat-resistant stud 5 welded to a band 4, which is used as a support member, and covered with a refractory material 6 of a predetermined size.

Figures 3 and 4 are sectional views taken along line B-B and line C- in Figure 2, respectively.
In the C cross-sectional view, ceramic fibers 7 are arranged in the recesses between the protrusions 3, 3 to improve heat insulation.

FIG. 5 is a sectional view taken along line B'-B' in FIG. 6, and shows a mode in which a heat insulating block is arranged on the water cooling pipe 8, and the notches of the end of the band fixed to the protrusion 3 on the inner surface of the heat insulating block are connected to each other. This method is to attach it to the water cooling pipe 8.

FIG. 6 is a sectional view taken along line DD in FIG.
Ceramic fiber 7 is placed in the recess formed between 3 and 3.

As explained in detail above, the known semicircular insulation block has the advantage of improving workability, but since the contact area between the water cooling pipe and the insulation block is approximately 100% compared to the length of the insulation block, the insulation effect is poor. Heat loss from the studs is large due to the small number of studs supporting the refractory and the large number of studs supporting the refractory.

Furthermore, when molding a heat insulating block, the supporting hardware of the heat insulating block is made up of studs and straps and has a complicated shape, and the supporting hardware must be embedded during block molding, making the molding complicated.

In addition, since the water-cooled pipe and the insulation block are in direct contact, if the surface of the water-cooled pipe is uneven, the notches at the end of the band cannot be joined together unless the surface is prepared with a grinder, etc. It is.

The present invention has been devised to advantageously solve the above-mentioned problems, and its gist is as follows.

In the split-type insulation block for the in-furnace water cooling pipe, the insulation block is formed into a semicircular shape, dowel grooves or dowels are formed at the top and bottom of the insulation block, and grooves for insulation block support hardware are carved on the inner surface of the upper part of the insulation block. This insulation block for a water-cooled pipe in a high-temperature reactor is characterized in that an insulation block support metal fitting insertion hole is provided continuously to the groove, and the inner surface of the insulation block is formed to be smooth.

Next, examples will be given.

Figures 7 to 11 show one embodiment of the present invention, and Figure 7 shows the external shape of a heat insulating block 11. The heat insulating block is made of refractory material and is formed into a semicircular shape, with dowels at the top and bottom. Groove 1
5 or dowels 16, and the dowels engage with the dowel grooves 15 of the heat insulating blocks arranged adjacently, and are restrained from each other.

Furthermore, a groove 13 for supporting metal fittings for supporting the block is cut into the upper inner surface of the heat insulating block, and a supporting metal fitting insertion hole 14 is formed continuous with the groove.

The inner surface of the heat insulating block 11 is molded smoothly so that there are no irregularities.

In addition to the above, there are horizontal dowels 12 at both ends of the semicircular shape as shown in Figure 7.
may be formed.

In this case, it goes without saying that dowel grooves are formed in the other heat insulating block.

FIG. 8 is a sectional view taken along the line AA in FIG. 7 and shows the internal structure of the heat insulating block.

In the figure, reference numeral 17 indicates a lath net, and it is preferable to embed it in the refractory 18 for the purpose of reinforcing the heat insulating block from the viewpoint of extending its life.

FIG. 9 is a cross-sectional view taken along the line B--B in FIG. 8, and the grooves 13 and holes 14 for supporting hardware for the heat insulating block are kept at the minimum necessary two locations.

The present invention is molded into the above-described structure, and the construction method thereof will be explained with reference to FIGS. 10 and 11.

FIG. 10 is a vertical cross-sectional explanatory diagram showing the insulation block 11 arranged on the water-cooled pipe 21, and the construction order is that the slide piece 19 is first welded to the water-cooled pipe 21 in advance, and then the inner surface of the insulation block 11 and the outer surface of the water-cooled pipe 21 are welded. The ceramic fiber 22 is wrapped around the water cooling pipe 21 by a thickness corresponding to the space formed in the space.

Next, apply mortar to the upper and lower surfaces and joint surfaces of both ends of the semicircular heat insulating block 11 and install the reslide piece 19 by aligning the position with the groove 13 and hole 14 for supporting hardware formed in the heat insulating block 11. .

Next, the insulation block 11 is easily fixed to the water cooling pipe 21 by inserting the ■-shaped support hardware 20 into the hole of the slide piece 19 and the hole 14 of the insulation block 11.

FIG. 11 is a cross-sectional view taken along line B'-B' in FIG. 10, and shows the heat insulating block 11 of the present invention disposed on the outer surface of the water cooling pipe 21. As shown in FIG.

As explained in detail above, the heat insulating block of the present invention has a semicircular shape with dowel grooves or dowels formed in the upper and lower parts, and grooves and holes for supporting hardware on the inner surface of the upper part, so that the inner surface is smooth. The insulation effect is extremely enhanced because studs with high thermal conductivity are not used and the insulation block and supporting hardware are completely separated.
Since there is no direct contact between the insulation block and the water-cooled pipe, there is no heat conduction from the insulation block to the water-cooled pipe.In addition, the inner surface of the insulation block is smooth, so there is no gap between the outer surface of the insulation block and the water-cooled pipe. Since highly insulating ceramic fiber lining can be easily applied to all parts, double-insulating lining can be applied to the entire length of the water cooling pipe.

Furthermore, since ceramic fiber is a fiber material that can be elastically deformed, it absorbs the unevenness of the water cooling pipe, and together with the smoothness of the inner surface of the insulation block, it is easy to set the insulation block.

The support method for the insulation blocks is to engage the dowels with dowel grooves provided at the top and bottom, and to insert molded support metal fittings that are easy to mold.Adjacent insulation blocks are restrained to each other, and the displacement is effective. In addition to being extremely easy to install and fix to water cooling pipes, construction efficiency is high.

In addition, when molding the heat insulating block, it exhibits industrially useful effects such as being extremely easy to mold because it has a simple shape and does not use studs.

The insulating block of the present invention can be applied to water-cooled pipes arranged at various angles, from horizontally arranged water-cooled pipes to vertically arranged water-cooled pipes. Application to pipes is particularly preferred.

Next, we will give an example of the construction of the heat insulation block of the present invention.

The inventive insulation block was applied to the insulation lining of the riser pipe of a continuous billet heating furnace.

As a result, we were able to achieve a significant reduction in construction time compared to the conventional insulation block shown in Figure 1.

Furthermore, during operation, heat loss was suppressed by 10%, and no peeling of the lining due to vibration of the riser pipe was observed, achieving an extremely long life.

[Brief explanation of drawings]

Figures 1 to 6 are explanatory diagrams showing a conventional semicircular heat insulation block. Figure 1 is an explanatory diagram of the overall appearance, and Figure 2 is A-A in Figure 1.
The cross-sectional explanatory drawings, Figures 3 and 4 are taken from B-C and C in Figure 2, respectively.
-C cross-sectional explanatory view, Figure 5 is a B'-B' cross-sectional explanatory view of Figure 6, Figure 6 is a D-D cross-sectional explanatory view of Figure 5, and Figures 7 to 1
Figure 1 is an explanatory diagram showing the heat insulating block of the present invention, Figure 7 is an explanatory diagram of the overall appearance, Figure 8 is an explanatory diagram of the A-A cross section in Figure 7, and Figure 9 is an explanatory diagram of the inventive heat insulating block.
The figure is an explanatory diagram of the B-B cross section in Figure 8, and Figure 10 is an explanatory diagram of the vertical cross section (C-C cross section in Figure 11) disposed in the water cooling pipe.
FIG. 11 is an explanatory cross-sectional view taken along line B'-B' in FIG. 10. 1: Heat insulation block, 2: Dowel or dowel groove, 3: Projection,
4: Metal strap, 5: Heat-resistant stud, 6: Refractory, 7: Ceramic fiber, 8: Water cooling pipe, 11: Heat insulation block, 12: Dowel or dowel groove, 13: Groove for support hardware, 14:
Hole, 15: Dowel groove, 16: Dowel, 17: Lath net, 18:
Refractory, 19 Ni-Ride piece, 20: Support hardware, 21
: Water cooling pipe, 22: Ceramic fiber

Claims (1)

[Scope of utility model registration request] In the split-type insulation block for in-furnace water cooling pipes, the insulation block is formed into a semicircular shape, dowel grooves or dowels are formed at the top and bottom of the insulation block, and grooves for insulation block support hardware are carved on the inner surface of the upper part of the insulation block. A heat insulating block for a water-cooled pipe in a high-temperature furnace, characterized in that an insulating block supporting hardware insertion hole is provided continuously to the groove, and the inner surface of the insulating block is formed to be smooth.