JPH0629675Y2 - Insulation block - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating block used for lining various furnaces such as metal furnaces, petrochemical furnaces, and the like, and in particular, the inner surface of the furnace is larger than 180 degrees (for example, 270 degrees). The present invention relates to a heat insulating block suitable for being attached to a bent portion.

[0002]

2. Description of the Related Art Conventionally, it has been practiced to line an inner surface of a furnace shell of a furnace with a heat insulating layer made of fireproof heat insulating fibers. The heat insulating layer is formed by laminating heat insulating fiber boards, felts, etc. in parallel with the iron skin and fixing them with studs provided at right angles to the iron skin, heat insulating fiber boards, felts, etc. A fixing lining which is laminated at a right angle to the skin surface and is fixed at a right angle to the iron skin surface, and a stack lining method in which the board, felt, etc. fixed to this fixing metal are fixed by a rod penetrating the iron skin surface in parallel, a heat insulating fiber A heat insulating block made into a block and having a mounting bracket attached to one surface thereof (for example, JP-A-55-15).
9397), there is a module method in which the mounting bracket is used to attach the steel to the iron skin. Among these, the modular method is preferable because it has advantages such as easy construction and high attachment strength of the heat insulating fiber to the iron skin.

[0003]

However, even in the module method, there is a problem in mounting on the bent portion of the furnace.
That is, as shown in FIG. 10, the heat insulating blocks 31a and 31b are attached to the inner surface of the portion where the outer surface of the furnace iron shell 30 is bent about 90 degrees (the portion where the inner surface of the iron shell is bent about 270 degrees) is attached to a certain thickness. When forming a heat insulating layer, one block 31
b has to project from the iron skin 30 by the thickness of the other block 31a, and if this structure is adopted, it is easily deformed as shown by the chain double-dashed line, and there is a problem that the heat insulation failure of the iron skin 30 may occur. there were.

The present invention has been made in view of the above problems, and the inner surface of the iron skin is larger than 180 degrees, for example, 2
It is an object of the present invention to provide an L-shaped heat insulating block suitable for mounting on a portion bent by about 70 degrees.

[0005]

That is, the present invention is a fiber block formed by laminating plate-like bodies of heat insulating fibers, the cross section of which is cut in parallel with the laminating plane is substantially L-shaped. A heat insulating block having a fiber block and a mounting member attached to at least one of L-shaped inner surfaces of the fiber block.

The term "substantially L-shaped" as used herein does not only mean that the angle between adjacent L-shaped inner surfaces is a right angle, but means that the angle is smaller than 180 degrees. . The angle formed by the L-shaped inner surface of the fiber block is determined according to the bending angle of the furnace inner surface to which the heat insulating block is attached. The angle formed by the L-shaped outer surface of the fiber block does not necessarily have to be equal to the angle formed by the inner surface.

The heat insulating fiber used in the present invention is not particularly limited, and is determined in consideration of heat resistance, heat insulating property and the like required at the place of use. Examples of heat insulating fibers include oxide fibers such as rock wool, glass fibers, ceramic fibers and alumina fibers, and inorganic fibers such as carbon fibers.

The plate-like body of the heat insulating fiber used in the present invention is an arbitrary plate-shaped body made of fibers, and may be flexible or bendable even if it does not have flexibility. It may be one. Specific examples include felt made by fixing fibers with an organic binder into a plate, a board made by fixing fibers with an inorganic binder into a plate, and a blanket made by combining fibers with a needling etc. into a plate. it can.

As a method for laminating plate-shaped bodies to form a fiber block having an L-shaped cross section, a long flexible plate-shaped body such as a blanket is prepared, and the plate-shaped bodies are arranged at regular intervals in the longitudinal direction. Open and mountain folds and valley folds are alternately repeated to be laminated, and at that time, by partially separating a part near one side edge of the plate-shaped body from the other part, without performing a mountain fold, There is a method of forming an L-shaped fiber block by protruding it as it is and inserting another plate-shaped body as necessary. In this case, the folded and laminated plate-like bodies are integrated with an appropriate fixing metal fitting and fixed to the mounting metal fitting.

The mounting bracket used in the present invention is
Anything that can be fixed by using bolts, studs, disks, etc., for example, a channel shape that fits and slides on the outer circumference of the disk fixed to the inner surface of the furnace, or a hole through which a bolt or stud is simply passed or The one provided with a groove is arbitrary.

[0011]

Since the L-shaped heat insulating block having the above structure has a shape that fits the inner surface of the bent portion of the furnace, the heat insulating layer covering the inner surface of the bent portion of the furnace is simply attached to the inner surface of the bent portion of the furnace. Can be formed, and its bent portion is covered with an L-shaped heat insulating block having an integral structure, so that heat insulation is reliable. Further, the plate-like body forming the heat insulating block,
Since it is placed at a right angle to the surface where the mounting bracket is attached,
It is possible to satisfactorily connect and integrate the mounting bracket with the mounting bracket only inside the insulating block or by the fixing brackets arranged on the side of the insulating block and inside the insulating block, and the mounting bracket and the plate-like body can be securely connected. When mounted on the inner surface of the furnace, the fixture can be embedded in the heat insulation layer, and the fixture is not directly exposed to the high temperature in the furnace, so heat resistance is not required.

[0012]

Embodiments of the present invention shown in the drawings will be described below. FIG. 1 is a perspective view showing an L-shaped heat insulating block according to an embodiment of the present invention. An L-shaped heat insulating block, generally designated by reference numeral 1, has a fiber block 2 having an L-shaped cross section and channel-shaped mounting members 3 and 4 mounted on the L-shaped inner surfaces 2A and 2B. The fiber block 2 of this embodiment is constructed by folding a blanket made of an inorganic fiber such as ceramic fiber, and inserting another blanket if necessary. Hereinafter, a method for manufacturing the fiber block 2 will be described.

First, a blanket 5 having a long shape shown in FIG. 2 is prepared. In FIG. 2, a chain double-dashed line A indicates a position that becomes a fold when the blanket 5 is valley-folded as described later, and a two-dot chain line B indicates a position that becomes a fold when the mountain fold is formed. B is located at a position with a constant space in the longitudinal direction of the blanket 5. At both ends of the blanket 5 (only one end is shown in the drawing), a protrusion 5a is formed so that the outside of the fold position A adjacent to the end is L-shaped, and the side where the protrusion 5a is formed. In the vicinity of the side edge of the part 5, the part 5 adjacent to each fold position B
b is partly separated from the other part by a longitudinal cut 6 extending between the folds A, B and a lateral cut 7 along the fold A. The blanket 5 is valley-folded at the fold position A, mountain-folded at the fold position B, and the mountain-fold and valley-fold are alternately repeated to fold and stack. The state in the middle of this is shown in FIG. Figure 3
As can be seen from the above, when the blanket 5 is folded in a mountain, the portion 5b near one side edge is separated from the other portion by the cuts 6 and 7, so that it is projected as it is without being folded in a mountain. Become. Therefore, by folding and stacking the blanket 5 in the state shown in FIG.
A mold fiber block 2 is formed. It should be noted that, compared to the portion where the mountain fold and the valley fold are repeated (the portion indicated by reference numeral 5A),
Since the thickness of the portion 5B, which is formed by protruding the portion 5b without performing the mountain folding, is about half, the thickness of the blanket 5 is reduced.
In order to make it uniform over the entire width of, the flat plate-shaped auxiliary blanket 8 is inserted.

In FIG. 1, one mounting member 3 is mounted on a surface 2A formed by a mountain-folded portion of the blanket 5. As shown in FIG. 4, the mounting member 3 has a large number of slits 3a and a central hole 3b, and a beam 10 is used for mounting the mounting member 3 on the fiber block 2. That is, the beam 10 is arranged inside the fold of the mountain fold portion of the blanket 5, the tab 10a thereof is projected through the blanket 5, and the slit 3 of the fitting 3 is attached.
The blanket 5 is fixed to the fitting 3 by inserting it into a and bending and fixing. The structure in which the beam 10 is arranged inside the fold of the folded blanket 5 and is fixed to the fitting 3 has an advantage of strengthening the connection between the blanket 5 and the fitting 3.

The other mounting member 4 has a U-shaped fixing member 12 fixed to its rear surface by welding or the like, and is inserted between the blankets in which the bent portions at both ends of the U-shaped fixing member 12 are laminated. The rod 13 inserted into the blanket and perpendicularly to the surface of the blanket also penetrates through the fixing fitting 12, and is fixed to the fiber block 2 by this structure.

Although not shown, the L-shaped heat insulating block 1 shown in FIG. 1 is fastened with tape so as to compress the blanket 5 in the thickness direction before mounting it on the inner surface of the furnace.

As shown in FIG. 5, the L-shaped heat insulating block 1 having the above-described structure has a mounting member 3 attached to a disk 15 mounted on iron shells 14a and 14b forming a furnace inner surface bent by about 270 degrees.
It is attached by engaging 4 and sliding. Further, a normal rectangular heat insulating block 16 is attached to a position adjacent to the L-shaped heat insulating block 1 to form a heat insulating layer on the inner surface of the iron shell. After that, the tape that binds the L-shaped heat insulating block 1 and the other heat insulating block 16 is cut or burned off as the temperature in the furnace rises, so that the blanket 5 expands and adheres to the adjacent block, which is excellent. A heat insulating layer having heat insulating properties is formed.

FIG. 6 shows another embodiment of the present invention. The L-shaped heat insulating block 1A of this embodiment has a fiber block 2 formed of a blanket 5 and an auxiliary blanket 8 and a mounting member 3 as in the heat insulating block 1 of FIG. L-shaped mounting bracket 1
8 is used. A part of the L-shaped mounting member 18 is inserted between the blankets, and is fixed to the fiber block 2 by a rod 19 that pierces the blanket. Further, the L-shaped mounting member 18 has a portion projecting above the fiber block 2 and has a groove 18a in that portion. To attach the L-shaped heat insulating block 1A to the inner surface of the furnace, the bolt provided on the inner surface of the iron shell is inserted into the central hole 3b of the attachment fitting 3, and the groove 18a of the attachment fitting 18 is also provided on the inner surface of the iron enclosure. It is fixed by inserting the bolt and tightening the nut.

In each of the above embodiments, the fittings are provided on both of the L-shaped inner surfaces 2A, 2B of the fiber block 2, but it is not necessary to provide the fittings on both sides, and one fitting, for example, 4 and 18 may be omitted. Also, when one of the mounting brackets is omitted, the surface 2 on the omitted side is
B may be fixed to the inner surface of the furnace by an appropriate means, for example, using a fixing metal fitting used in the stack lining method.

In the embodiment shown in FIGS. 1 and 6, the fiber block 2 is formed by folding the blanket 5 and inserting the flat plate-like auxiliary blanket 8 as shown in FIG. As the auxiliary blanket sandwiched between them, an auxiliary blanket 20 folded in two may be used as shown in FIG. 7. When this auxiliary blanket 20 is used, the bent back surface 20a is exposed to the inside of the furnace and the end surface of the blanket is less exposed, so that there is an advantage that the heat insulation performance is improved.

FIG. 8 is a plan view showing a modified example of a blanket for making a fiber block. This blanket 22
As a cut formed near one side edge, a cut 23 in the lateral direction and a cut 24 in the longitudinal direction extending on both sides thereof are formed. FIG. 9 is a perspective view showing a state in which the blanket 22 of FIG. 8 is folded, and the blanket portions 22a are symmetrically opposed to each other with the valley-folded portion of the blanket 22 sandwiched therebetween. The folded first auxiliary blanket 25 is inserted between the pair of facing blanket portions 22a, and the first auxiliary blanket 25 and the blanket 22 are inserted.
By inserting the second auxiliary blanket 26 into the valley-folded portion and compressing the whole, an L-shaped fiber block as a whole can be formed.

[0022]

As described above, the L-shaped heat insulating block of the present invention has a shape that fits the inner surface of the bent portion of the furnace and has a mounting metal fitting on the inner surface of the furnace. Therefore, it can be attached to the inner surface of the bent portion of the furnace very easily with this mounting bracket, and the workability is very good.
Since it is covered with the mold heat insulating block, it has the effect of ensuring the heat insulation. Furthermore, since the metal fittings for fixing the mounting metal fittings and the fiber block to the mounting metal fittings are covered with the fiber block, they are not directly exposed to the high temperature in the furnace, and the materials used are required to have high heat resistance. In addition, it has an effect that it can be inexpensive.

When a foldable blanket is used as the plate-like body for forming the fiber block as shown in the embodiment, the beam is passed through the inside of the fold of the mountain fold,
By mounting the beam on the mounting bracket, the blanket and the mounting bracket can be firmly fixed.

[Brief description of drawings]

FIG. 1 is a perspective view of an L-shaped heat insulating block according to an embodiment of the present invention.

FIG. 2 is a plan view of a blanket forming a fiber block in the above-described embodiment.

FIG. 3 is a perspective view showing a state in which the fiber block is being formed.

FIG. 4 is a perspective view showing a mounting bracket and a beam used for the L-shaped heat insulating block.

FIG. 5 is a cross-sectional view showing a state in which the L-shaped heat insulating block is attached to a bent portion on the inner surface of the furnace.

FIG. 6 is a perspective view of an L-shaped heat insulating block according to another embodiment of the present invention.

FIG. 7 is a perspective view similar to FIG. 3, showing a state in which a fiber block is being formed in still another embodiment of the present invention.

FIG. 8 is a plan view showing a blanket forming a fiber block according to still another embodiment of the present invention.

9 is a perspective view similar to FIG. 3, showing a state in which a fiber block is being formed using the blanket of FIG.

FIG. 10 is a cross-sectional view showing a conventional heat insulation structure for a bent portion of an inner surface of a furnace.

[Explanation of symbols]

 1 L type heat insulation block 2 Fiber block 2A, 2B Inner surface 3, 4 Mounting bracket 5 Blanket 6, 7 Break 8 Auxiliary blanket 10 Beam 12 Fixing bracket 13 Rod

Claims (6)

[Scope of utility model registration request] 1. A fiber block formed by laminating plate-like bodies of heat insulating fibers, the fiber block having a substantially L-shaped cross section cut in parallel with the laminating plane, and the L-shaped shape of the fiber block. And a mounting bracket attached to at least one of the inner surfaces of the heat insulating block. 2. The heat insulating block according to claim 1, wherein the plate-shaped body is a blanket of heat insulating fibers. 3. The fiber block is formed by stacking a long blanket of heat insulating fibers by repeating mountain folds and valley folds at regular intervals in the longitudinal direction, and at that time, a part of the blanket near one side edge is partially covered. The heat insulation block according to claim 1, further comprising the blanket that is protruded without being mountain-folded by being separated from other portions. 4. The heat insulating block according to claim 1, wherein the plate-shaped body is a felt made of heat insulating fibers. 5. The heat insulating block according to claim 1, wherein the plate-shaped body is a board of heat insulating fibers. 6. The fiber block is formed by stacking substantially L-shaped plate-like bodies.
The heat insulating block according to any one of 2, 4, and 5.