JPH0121968Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a partition wall that is provided inside an industrial furnace so as to be independent from the hearth.

[Conventional technology and problems]

For example, in a steel heating furnace, in addition to directly heating the steel material through convection heat transfer of high-temperature gas in the furnace, the steel material is also heated by radiation heat transfer from the furnace inner wall surface heated by the high-temperature gas. However, since radiant heating from the wall surface has a high heat transfer efficiency to the heated object and can provide effective heating, efforts are being made to increase the area of the radiant wall in the furnace. As an example of this, for example, JP-A-60
-The radiant panel shown in Publication No. 17686 has a bottom plate attached at both ends to the lower end of a hanging rod suspended from the ceiling of the furnace at an appropriate interval, and a ventilated flat plate is placed in multiple stages on top of the bottom plate. The ventilated plates are stacked on top of each other to form a radiant surface by allowing the high-temperature gas inside the furnace to flow through the ventilated plates. is inserted into the groove on the bottom plate with a concave cross section, and then a slip prevention member with an H-shaped cross section having approximately the same length and width as the bottom plate is passed through the hanging rod from above and placed over the upper edge of the breathable plate.
Insert the lower edge of the second tier of breathable plates onto this slip-preventing member, then cover the upper edge of this breathable plate with another slip-preventing member in the same way as described above, and stack the breathable boards one after another. It was hot. Therefore, this structure has the following problems.

(b) The bottom plate that holds the breathable plate must be made of a highly heat-resistant material such as ceramic, but because its cross-sectional shape is asymmetrical, it tends to warp during firing, requiring straightening or machining after firing. The production cost is high. In addition, even when used, even a slight temperature difference can easily cause warping, putting stress on the breathable board.
On the other hand, it can easily come off. Also, if you make the groove shallow to prevent warping, it will easily come off.

(b) If the anti-slip member with an H-shaped cross section is molded from ceramic, it needs to be 5 to 10 mm thick, so at least that thickness will reduce the ventilation area of the breathable plate and the area of the radiation wall. I don't get it.

(c) If the bottom plate extends in the longitudinal direction due to thermal expansion, bending stress will be applied to the hanging rod, which may deform and damage it.

(d) If the breathable plate on the lower level is damaged during use and you try to replace it, you will not be able to replace the breathable plate unless you remove all the upper breathable plates and the anti-slip member upwards. However, maintenance work was extremely troublesome and difficult to perform in a narrow furnace.

Additionally, the above-mentioned Japanese Patent Application Laid-Open No. 17686/1986 suggests that the radiant panel be made independent on the hearth using studs, etc., instead of being hung, but the above (a)
Each of the problems in (d) to (d) cannot be solved even when the hearth is made to stand on its own; rather, the probability of damage due to its own weight increases.

[Purpose of invention]

The present invention has been devised in view of the above, and its first purpose is to provide a free-standing furnace partition wall that is easy to manufacture using ceramic. The second part of this invention
The purpose of the present invention is to provide a free-standing furnace partition wall that is less likely to be damaged or slip off due to thermal deformation. A third object of the present invention is to provide a free-standing furnace partition wall that can secure as large a radiation wall area as possible. Furthermore, a fourth object of the present invention is to provide a self-supporting furnace partition wall that is easy to maintain.

[Means to achieve the purpose]

In order to achieve the above object, the free-standing furnace partition wall of the present invention consists of a plurality of hollow rectangular ceramic pillars vertically erected above the hearth at appropriate intervals, and surrounded by heat-resistant ceramic fibers. A plurality of rectangular ceramic wall plates arranged with an elastic material are stacked in multiple tiers between the respective pillars, and ceramic retaining plates are screwed to cover the surface corners of the wall plates, A hollow rectangular bar-shaped ceramic crosspiece having the same diameter as the support is placed on the upper end surface of each of the pillars, and a ceramic headed rod pin is loosely inserted into the upper end opening of each of the pillars from the upper surface of the horizontal crosspiece. It is characterized by being fixed.

[Example] In the partition wall shown in Fig. 1, 1, 1, 1 are pillars made of ceramic in the shape of hollow square rods with a round hole in the axis, and each pillar 1, 1, 1 is connected to its lower end. By embedding it in the hearth 2 in the furnace, the appropriate interval (300 ~
700mm) and established vertically on the hearth 2.
And on the upper end surface of each of the pillars 1, 1, 1,
A hollow rectangular bar-shaped ceramic horizontal bar 3 having the same diameter as 1 and 1 and also having a round hole through its axis is placed on the horizontal bar 3, and the diameter of a headed rod pin 4 is set on the horizontal bar 3 as shown in FIG. A large through hole 5 is opened with sufficient margin, and the headed rod pin 4 is inserted into the through hole 5 from the upper surface side of the horizontal beam 3, and its tip is inserted into the upper end opening of each of the pillars 1, 1, 1. It is assembled by loosely inserting it inside. Each of the pillars 1, 1, 1 and the horizontal beam 3 is made of a ceramic material having excellent heat resistance and thermal shock resistance, particularly recrystallized silicon carbide or self-sintering silicon carbide. 6, 6... are each pillar 1,
These are rectangular wall plates stacked in multiple stages between 1, 1, and each wall plate 6, 6... has flat plate-shaped presser pieces 7, 7 applied from both sides to each corner of its surface, as shown in Fig. 3. As shown, the through holes 1 are opened in both the presser pieces 7, 7.
1, 11 and the through hole 12 made in the support column 1. Pass the locking bolt 9 through the locking bolt 9 and tighten the nut 10.
Tighten and install. The attached parts such as the headed rod pin 4, the holding pieces 7, 7, the locking bolt 9, and the nut 10 are all made of ceramic. Also, between the wall plate 6 and the hearth 2, the wall plates 6, 6
A heat-resistant elastic material 13 made of ceramic fiber is filled between the wall panels 6 and the pillars 1 as well as between the wall panels 6 and the horizontal beams 3 to provide airtightness and thermal shock absorption in each gap. be obtained.

On the other hand, FIG. 4 shows another embodiment of the present invention, in which in this partition wall each pillar 1, 1, 1 is attached to the hearth 2.
Metal or ceramic embedded rod 1 corresponding to
4, and attach each support 1, to each embedded rod 14.
A partition wall is established on the hearth 2 by extrapolating the lower ends of 1 and 1. Further, each wall plate 6, 6, . In other words, as shown in FIG. 5, the wall plates 6, 6, etc. are placed across the pillars 1, 1, 1 on one side of the pillars 1, 1, 1, which are set on the hearth 2 in the same plane. Place the holding plate 7 on the corner of the opposite side edges of the side-by-side wall plates 6, 6, insert the locking bolt 9 from the holding plate 7 side, and tighten the nut 10 on the end protruding toward the column 1 side. At the same time, a hook-shaped presser piece 8 is applied to the corner of the outer edge of each wall plate 6, 6..., and a locking bolt 9 is inserted from the presser piece 8 side to protrude toward the column 1 side. It is attached by tightening a nut 10 at the end.

The self-supporting furnace partition wall constructed in this way is placed and used in the furnace in the form shown in FIGS. 6 to 9. That is, Fig. 6 shows a straight line, Fig. 7 shows a zigzag pattern, Fig. 8 shows a rectangular pattern,
Figure 9 shows a mountain-shaped structure that is arranged independently in the flow path of high-temperature gas in the furnace so as to block the flow path, and the high-temperature gas is discharged by passing through this partition wall. Heat recovery takes place.

However, according to this furnace partition wall, each support 1, 1, 1 is erected on the hearth 2, and each wall plate 6, 6... is attached to each support 1, 1, 1 by a holding piece 7, 8. Since the structure allows the load to be received by each wall plate 6, 6..., the load on the hearth 2
It only hangs on the pillars 1, 1, 1, and hardly hangs on the pillars 1, 1, 1, and the upper end surface of each pillar 1, 1, 1 and the horizontal beam 3.
Due to the configuration in which the headed rod pin 4 is inserted loosely so that the sides of the rod are butted against each other and the two can move freely,
Even if the horizontal beam 3 thermally expands due to the high temperature gas in the furnace and extends in its length direction, the support 1 will not curve.
Therefore, deformation, breakage, etc. of the support column 1 due to these do not occur. Moreover, each wall plate 6, 6... is a presser piece 7, 8
Each wall plate 6, 6 can freely expand or contract thermally just by being received by the
... is not applied to excessive thermal stress, and therefore the wall board 6 will not be damaged due to this. In addition, in the event that the wall board 6 is damaged, hold the wall board immediately above the damaged wall board with your hands for a while to destroy and remove the damaged wall board, and then remove the upper wall board. If you lower it down and insert a new wall board into the empty space at the top, you can easily repair it by simply moving the wall board in the damaged row.

Note that the wall plate 6 is not limited to one that is breathable; for example, the partition of the present invention can also be used when a non-breathable wall plate such as a heat reflecting plate is made to stand alone in the furnace. Wall structure can be applied.

[Effect of idea]

In this way, the free-standing furnace partition wall of the present invention has the same diameter as the support and the cross-section, and the cross-section is symmetrical in the shape of a hollow rectangular rod, so it is easy to mold with ceramic without warping, and the manufacturing cost is low. do not have. In addition, since the horizontal beam is fixed to the upper end of the column by loosely inserting a headed rod pin, even if the horizontal beam expands due to thermal expansion, unnecessary stress will not be applied to the horizontal beam, resulting in problems such as breakage and bending. There is little risk of Also, unlike a hanging partition wall, the load of the partition wall can be borne by the hearth, so unlike a hanging partition wall, it can be installed without placing a load on the ceiling wall of the furnace body. It can be easily installed without considering strength. Furthermore, since the wall plate is attached with only a portion of its surface corner covered by the presser plate, the radiant wall area can be increased and thermal efficiency is improved. Furthermore, even if a wall board located in the lower row is damaged, it can be easily replaced by simply removing the damaged wall board, moving the row down, and inserting a new wall board in the top row, making maintenance easy. There are various advantages such as

[Brief explanation of the drawing]

The figures relate to the present invention; Figure 1 is a front view showing how the partition wall is installed in the furnace, and Figure 2 is A of Figure 1.
FIG. 3 is an enlarged cross-sectional view taken along the line B-B in FIG. C in Figure 4
-C line enlarged cross-sectional views and FIGS. 6 to 9 are illustrations of various installation forms of the partition wall in the furnace. 1... Support, 2... Hearth, 3... Horizontal beam, 4...
Headed rod pin, 6... Wall plate, 7, 8... Holding piece, 9... Locking bolt, 10... Nut, 13...
...elastic material.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A plurality of hollow square rod-shaped pillars made of ceramic are vertically established at appropriate intervals on the hearth, and a heat-resistant elastic material made of ceramic fiber is arranged around the pillars. Ceramic wall boards in the shape of rectangles are stacked in multiple stages between the above-mentioned pillars, and ceramic retaining plates are screwed so as to cover the surface corners of the wall boards, and the ceramic retaining plates are screwed onto the upper end surfaces of each of the pillars. A hollow rectangular ceramic crosspiece having the same diameter as the support is applied, and a ceramic headed rod pin is loosely inserted into the upper end opening of each support from the upper side of the crosspiece and fixed thereto. A free-standing furnace partition wall. 2. The free-standing furnace partition wall as set forth in claim 1 of the utility model registration claim, characterized in that the material of each support and horizontal bar is recrystallized silicon carbide or self-sintering silicon carbide. 3. The free-standing furnace partition wall according to claim 1 or 2, wherein each wall plate is formed with a large number of ventilation holes through which furnace gas can flow.