JPS62108992A - High-temperature continuous heating furnace - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a high-temperature continuous heating furnace used to continuously heat a plurality of workpieces.

<Prior Art> Conventionally, high-temperature continuous heating furnaces have been constructed by stacking small blocks of refractory insulating bricks or insulating bricks. However, in this high-temperature continuous heating furnace, since the bricks in the form of small blocks are used in large numbers, there is a problem that the entire furnace becomes heavy.

In addition, in the high-temperature continuous heating furnace described in 2. Since the bricks (i) are sequentially stacked to build the furnace, there is a problem in that this work requires a great deal of effort.

In addition, we will introduce another conventional high-temperature continuous heating furnace and 1. There are some furnaces constructed using fiber insulation material. As shown in FIG. 4, this high-temperature continuous heating furnace includes a castable wall 8 formed on the inner surface 9a of a metal frame 9, and a base 2b of a ceramic stud 2 buried in the castable wall 8. A ceramic board 6 and a fiber insulating material such as alumina wool 5 are sequentially inserted into this stud 2 and laminated.A hot plate heater l is fitted into the tip 2a of the stud 2, and a washer 4 is attached to the tip of the stud 2. It is fixed at 2a.

However, in the above-mentioned high-temperature continuous heating furnace, a lightweight fiber insulation material is used, which has the advantage of reducing the weight of the furnace. From the tip 2a through the stud 2
Since the heat is transmitted to the metal frame 8 near the base 2b and radiated from the metal frame 8 to the atmosphere, there is a problem that thermal energy is lost. In the high-temperature continuous heating furnace, a large number of studs 2 are buried in the castable wall 8, holes are provided in the alumina wool 5 and the ceramic board 6 through which the studs 2 are inserted, and the studs 2 are filled with the alumina wool. 5. In order to insert and fix the ceramic board 6, a large number of studs 2 are required, and there is a problem in that drilling the holes and inserting the studs 2 through them requires a lot of effort.

<Object of the Invention> Therefore, the object of the present invention is to provide a high-temperature continuous heating furnace that can simplify the work required for assembly, reduce the weight of the entire furnace, and prevent thermal energy from escaping from the assembled heating furnace. Our goal is to provide the following.

<Configuration of the Invention> In order to achieve the above object, the configuration of the present invention is as follows. Second. As illustrated in FIG. 3, a plurality of unit spaces 2
1 connected to each other, the inner framework of the unit space 21 is constructed by erecting columns 25 made of rigid refractories at a predetermined distance from each other, and a pair of opposing columns 25 are provided. A horizontal member 35 made of a rigid refractory is placed between them, and the engaging portions 36 provided at both ends of the horizontal member 35 are engaged with the engaging portions 34 provided at the upper end of the column 25. Furthermore, a side insulation board 62 made of a fiber insulation material is attached to the outer surface 2 of the support column 25.
The furnace chamber 3 is supported by the side heat insulating board 62 supported by 5C.
A ceiling insulation board 64 made of a fiber insulation material is placed on the upper surface 35a of the horizontal member 35, and the ceiling insulation board 64 forms the ceiling of the furnace chamber 3I. It is characterized by becoming.

<Operation of the Invention> In the above configuration, the rigid columns 25 are erected at a predetermined interval from each other, and the engaging portions 34 provided at the upper ends of the columns 25 are provided at both ends of the rigid horizontal members 35. The engaged portion 36 is engaged.

In this way, the rigid support column 25 and the rigid horizontal member 3
A strong framework can be created simply by engaging the parts 5 and 5, making the work easier. Next, a side insulation board 62 made of a fiber insulation material is brought into contact with and supported by the outer surface 25c of the support column 25, while a ceiling insulation board 2 made of fiber insulation material is attached to the second surface 35a of the horizontal member 35. A wall portion and a ceiling portion are formed, and a furnace chamber 31 is formed by connecting a plurality of such unit spaces 21. Therefore, the formation of the furnace chamber 31 is extremely simple. In addition, since the fiber insulation material is lightweight, the weight of the furnace can be reduced. In addition, when the temperature of the furnace chamber 3I is high, the thermal energy within the furnace chamber 31 is blocked by the side insulation boards 62 and the ceiling insulation board 64 and is not released to the outside.

<Example> Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments.

FIG. 1 is an assembled diagram of the high-temperature continuous heating furnace of the present invention, and FIG. 2 is a sectional view of the high-temperature continuous heating furnace cut along the front-rear direction. In FIG. 2, 21° 21... are unit spaces, and these unit spaces 21, 21... are connected to form a furnace chamber 31.

Further, 22.22... are block-shaped insulating bricks stacked in two layers on the base 30, 24. ．． 24... is the above-mentioned insulating brick 22.22... is a corner board at a predetermined distance from each other,
1JNI+Tate A Irokure, Uni Soto Space 21.21・
Alumina material (chemical composition, for example, A
ρ20375%, Sin, -15%, others -9%), fire resistance and stiffness, i.e. hot bending strength,
A first foundation brick in the form of a thick plate made of a refractory with excellent compressive strength (hereinafter referred to as an alumina refractory), 25, 25,
25.25 is an insulating rectangular pillar made of alumina refractory that partitions the four corners of the unit space 2I, 64, 65.66
is a thin ceiling insulation board made of fiber insulation material laminated in sequence on the ceiling of the unit space 21.

In Fig. 1, a second foundation brick made of block-shaped alumina refractory material, which is shorter in height than the first foundation brick 24.24, is shown.
The foundation bricks 32, 32, 32.32 are replaced with the above insulation brick 2.
2.22... Place this second foundation brick 32 on top
, 32, 32.32 on both sides 24a, 24a, 24a of the first foundation brick 24.24.

It is in contact with 24a. Next, this second foundation brick 3
2, 32, 32. 32 upper surface 32a, 32a, 32a,
The above-mentioned supports 25, 25, 25.25 are erected on 32a,
The above pillars 25, 25, 25.25 are connected to the first foundation brick 24
．． Both sides of 24 24 a, 24 a, 24 a,
It is in contact with 24a. A projection 34 having the shape shown in the figure is formed on the upper surface 25a of this support 25 by extending the inner center portion of the upper end of the support 25. As shown in FIG. The inner surface 34 of this protrusion 34. a and the inner surface 25a of the support column 25 are on the same plane.

Protrusions 34, 34, 3 of the above pillars 25, 25, 25.25
4. Top surface 25a, 25a excluding 34.

The four corners of the lower surface 38b of the substantially rectangular upper support temporary 38 for the molybdenum disilicide-based heating element are placed on 25a, 25a. This upper support plate 38 has a high melting point,
Made of mullite, which has a low coefficient of thermal expansion and excellent electrical insulation. The upper support plate 38 has a projection 39 with a rectangular cross section extending in the left-right direction at the center of its upper surface 38a, and a projection 39 with a rectangular cross-section extending in the left-right direction at both ends of the lower surface 38b in the front-rear direction. 41.41 is formed. The length of this protrusion 41 is the same length as the distance between the pair of supporting columns 25, 25 facing each other when the protrusion 4I expands due to heat. Further, the caps 35 arranged in the left-right direction and engaged with the protrusions 34 of the pillars 25 are made of elongated alumina refractory material and have a rectangular cross section. This beam 35
The upper surface 35a is cut out on both sides in the front-rear direction to form stepped portions 42, 42 up to both ends.
The lower surface 35b is provided with protrusions 44, 44 having a rectangular cross section and extending along the center line in the left-right direction.

Both ends of this protrusion 44 are cut out, and the length of the protrusion 44 is equal to that of the protrusion 44 provided on the lower surface 38b of the upper support plate 38.
The length is the same as that of Further, the height of the protrusion 44 is the same as the thickness of the upper support plate 38. And the upper surface 25a of the support 1'125, 25°25.25
, 25a, 25a, 25a to support the upper support plate 38 by placing the four corners of the upper support plate 38,
35 through holes 36, 36.36.
, 25.25, the projections 34.34, 34.34 have a fit thickness. In this way, the inner surface 25 of the struts 25, 25, 25.
The lower part of b, 25b, 25b, 25b is the first foundation brick 2
4.24 is supported by each side 24a, 24a, 24a, 24a, and the inner surface 25b of the column 25.25, 25.25.
, 25b, 25b, 25b have both ends 41a, -1 of a protrusion 41.41 provided on the lower surface 38b of the upper support plate 38.
1a, 11a.

41a, and further supported by supports 25, 25, 25.25
The projections 34, 34, 34.34 are engaged with and supported by the beams 35, 35 through the through holes 36.36. The lower portions of the projections 34.34, 34.34 are located at the lower surface 35b of the casing 35°35.
4a, 44a, 44a. Therefore, the pillars 25°25.25 that frame the four corners of the unit space 21.
25 is strongly supported in the inner direction of the unit space 2I, and the supports tt25, 25, 25.25 do not fall down. Further, as shown in FIG. 1.3, the upper surface 35a of the beam 35.35, the horizontal portion 42a of the step portion 42.42 of the beam 35a,
42a is handed over t)lj45. This top plate,
45 is made of an alumina refractory with an approximately concave μm color, and the thickness of the top plate 15 is the same as that of the stepped portions 42 and 35 of the top plate 15.
It has the same dimensions as the depth of 42.

Also, insulating bricks 22° 22 between the first foundation bricks 24, 24 marked J, which face each other in the rear direction of the middle surface of FIG.
..., block-shaped fireproof insulation brick 52.52...,
Refractory brick 5 made of block-shaped alumina refractory material
4, 5'4... are stacked.

A lower support plate 55 for a molybdenum disilicide heating element having the same quality and substantially the same shape as the above-mentioned lower support plate 38 is placed on top of the refractory bricks 54, 54.

In addition, the upper surfaces 24b, 2 of the second foundation brick 24.24
4b is engaged with an engaging portion 60 of a hearth bottom plate 56 made of a substantially rectangular refractory. Engaging portion 60 of the furnace bottom plate 56
are formed by cutting out both ends of the lower surface 56b of the furnace bottom plate 56 in the front and back direction. In addition, the upper surface 5 of the furnace bottom plate 56
6a has four portions 58 formed therein. A workpiece 100 is placed in this recess 58 .

Furthermore, molybdenum disilicide heating elements 59 and 61 are mounted substantially horizontally on the upper support plate 38 and the lower support plate 55, respectively.

In addition, the upper surfaces 32a, 3 of the second foundation bricks 32.32
A thin side insulation bow F'G2, 62 made of a substantially rectangular fiber insulation material is erected on 2a, and the above-mentioned supports 25, 25, 2
5.25 outer surface 25c, 25c, 25c.

The inner surfaces 62a and 62 of the side insulation boards 62 and 62 are attached to 25c.
It is in contact with a. The height of this side insulation board 62 is
The height is made to match the height of the pillar 25 and the upper support @ 38, the beam 35, and the top plate 45 superimposed on the pillar 25. Therefore, the upper surface 45a of the top plate 45 and the upper surface 62c of the side insulation board 62 become the same plane. The entire top surface 45a of the top plate 45 and the top surface 6 of the side insulation board 62 are on the same plane.
A thin ceiling insulation board 64 made of fiber insulation material is placed on 2c. Next, the upper surface 6 of the ceiling insulation board 64
Ceiling insulation board 6 made of fiber insulation material, which is different from 4a
5.66 are laminated in two layers to form the ceiling of the furnace chamber 31, and on the back side 62b of the side insulation board 62, another side insulation board 68.6 g, 6 made of fiber insulation material is laminated in two layers.
9.69 is laminated in two layers to form the wall of the furnace chamber 3I. Then, the outer periphery of the entire furnace chamber 31 is tightened with the molded steel 71, and the side insulation boards 62, 68, 69 are pressed against the pillars 25 for support. Meanwhile, the ceiling insulation boards 64, 65, 66 are pressed against the entire surface of the top plate 45. and support it. Further, a thermocouple 72 is provided that penetrates the side insulation boards 62, 68, and 69 to detect the temperature inside the furnace chamber 31.

” Like two series, pillars 25, 25... and beams 35, 35,
Since the furnace construction is simply a matter of engaging the . In addition, the thermal energy in the furnace chamber 31 is transferred to the heat insulating boards 62, 64, 65, G 6, 6.
8.69, it is possible to maintain a high heat insulation effect without leaking to the outside. In addition, the insulation board 62
,64,65. Since G6, 68.69 is made of relatively thin fibers and heat insulating material, the weight of the furnace can be reduced. Furthermore, ceiling insulation board 64. , 65.

66 is supported by the entire surface of the top plate 45 made of refractory material, so when the temperature inside the furnace chamber 3I is high, the ceiling insulation boat 64 will not sag or fall into the furnace chamber 31, and the inside of the furnace chamber 31 will be kept clean. It can be realized.

In the above embodiment, the furnace chamber 31 has a single-row structure, but the furnace chamber 3I may have a double-row structure or a multi-row structure. Further, in the above embodiment, the upper support plate 38 and the lower support plate 55 were provided because a molybdenum disilicide-based heating element was used as the heating element 59, 61, but when using a SiC-based heating element, In this case, the support plate 38.55 is not required.

<Effects of the Invention> As described above, the high-temperature continuous heating furnace of the present invention connects the unit spaces to form the furnace chamber, and connects the two-legged unit space to the engagement portion of the support column by connecting the horizontal member to the bottom. The engaging portions are engaged to form an inner framework, and a side insulation board is brought into contact with the outer surface of the pillar for support, while a ceiling insulation board is placed on the upper surface of the horizontal member for support. ing.

Therefore, according to this invention, the thermal energy inside the furnace chamber does not leak to the outside through the studs as in the prior art, and the thermal energy inside the furnace chamber is blocked by the side insulation boards and the ceiling insulation board, so that the insulation effect is improved. can be highly promoted. Further, according to the present invention, since the furnace is built by mutually engaging the engaging portions of the horizontal members with the engaging portions of the struts,
Studs as in the prior art are not required, and the labor of inserting side insulation boards and ceiling insulation boards into the studs can be saved, and the furnace can be built easily and the time required for furnace construction can be shortened. Further, according to the present invention, since the side insulation board and the ceiling insulation board are made of light fiber insulation material, it is possible to reduce the weight of the entire furnace.

[Brief explanation of drawings]

Fig. 1 is an assembly diagram of an embodiment of the present invention, Fig. 2 is a cross-sectional view of the above-mentioned embodiment taken along the front-rear direction, Fig. 3 is a cross-sectional view taken along the line 1--2 in Fig. 2, and Fig. 4 is a conventional FIG. 3 is an example cross-sectional view. 21...Unit space, 25...Strut, 31...Furnace chamber, 34...Engaging portion, 35...Horizontal member, 62.68.69...Side insulation board, 64.65.
66...Ceiling insulation board. Patent applicant: Koyo Lindbergh Co., Ltd. Agent: Patent attorney 2 other famous confectionery products including Aohaku and 2 other confections.

Claims (3)

[Claims] (1) A high-temperature continuous heating furnace formed by connecting a plurality of unit spaces to form a furnace chamber; A horizontal member made of a rigid refractory material is placed between a pair of opposing pillars, and an engaging portion provided at both ends of the horizontal member is provided at an upper end of the pillar. configured to engage with the
Further, a side insulation board made of fiber insulation material is supported on the outer surface of the support column so that the side insulation board forms the wall of the furnace chamber, and a ceiling insulation board made of fiber insulation material is supported on the outer surface of the support column. A high-temperature continuous heating furnace characterized in that the ceiling part of the furnace chamber is formed by the ceiling insulation board placed on the upper surface. (2) The high-temperature continuous heating furnace according to claim 1, wherein the wall portion is formed by laminating the side insulation boards. (3) The high-temperature continuous heating furnace according to claim 1, wherein the ceiling is formed by laminating the ceiling insulation boards.