JPS6347992B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a heat insulating material when a monolithic refractory and a heat insulating material are installed in combination on the ceiling of a kiln such as a heating furnace, a firing furnace, an annealing furnace, etc. It is related to the support method.

Conventional Techniques Conventionally used techniques include (1) pouring monolithic refractories, curing and hardening, drilling holes with a boring machine, driving and fixing all anchors, and then inserting insulation material; It can be supported and fixed using washers and nuts (a cross section is shown in Figure 8), or (2) it can be attached to the lower surface of the lining of a hardened monolithic refractory using mortar.

Problems to be Solved by the Invention In the prior art, monolithic refractories are poured, cured and hardened, and then holes are drilled using a boring machine and all anchors are driven into them. The refractory lining may be damaged, objects may fall during boring, making the work difficult for health and safety reasons, and after pouring the monolithic refractory,
Drilling holes or driving anchors wastes money and time, making it difficult to reduce costs.

Means for Solving the Problems The present inventors have succeeded in developing the support method of the present invention as a result of various studies in order to eliminate the various drawbacks of the conventional method as described above. A formwork with anchor bolts bent arbitrarily at one end to fix the washer and prevent it from pulling out is installed, and monolithic refractories are poured in, cured, and cured, then the formwork is removed and the insulation material is installed. The present invention provides a method for supporting a ceiling heat insulating material, which is characterized in that the anchor bolt, which has a sharp tip, is inserted into the anchor bolt and fixed with a washer and a nut.

The heat insulating material is, for example, a ceramic fiber blanket or a ceramic module made by laminating small pieces of felt and molded to a predetermined size, and the direction in which the fibers are arranged is perpendicular to the furnace wall. "Pyro Block" (trade name), which is commercially available from the applicant company, is suitable.

A specific example of the method for supporting a ceiling heat insulating material according to the present invention will be described in detail based on the accompanying drawings.

Anchor hardware 3 for suspending the monolithic refractories 4 and 5 is set on the shaped steel 2 installed on the ceiling of the carbon firing furnace 1, and washers 9 are fixed at regular intervals to prevent them from being pulled out. A formwork 11 is installed in which one end is bent into an arbitrary shape, the other end is threaded, and an anchor bolt 8 with a sharp tip is attached. The means for installing the formwork 11 is a method commonly used for pouring castable refractories, and examples thereof are shown in schematic cross-sectional views in FIGS. 6 and 7. FIG. 6 shows a method of supporting the formwork 11 using the support frame 12, and FIG. 7 shows a method of supporting the formwork 11 using the support frame 12. FIG. hanging,
How to support it is shown.

As mentioned above, after setting the formwork 11, the lightweight castable 4 (for example, LCT-
80A) is first poured to a thickness of 150mm, and after curing, it is further poured into lightweight castable 5 (for example, the product of the applicant company).
LCT-30) was poured to a thickness of 100 mm and cured, and then
Insulating boards (MG boards) 6 with a thickness of 25 mm were arranged. After that, the formwork was removed, and four sheets of 50mm thick insulation material (600mm x 6000mm) were stacked on the anchor bolts and stuck at intervals of 250mm in the furnace width direction and 170mm in the furnace length direction, and the washer 10' and nut 10 is attached to the anchor bolt 8, thereby creating a structure in which the heat insulating material block 7 is fixed and supported.

Function: In order to fix the washers at regular intervals and prevent them from being pulled out, one end is bent into an arbitrary shape, and the other end is fitted with an anchor bolt with a threaded end and a sharp tip. Pour in, cure,
As long as the frame is removed after curing, the insulating material can be inserted into the anchor bolt and supported using washers and nuts without having to drill holes in the lining or drive anchors. The installation interval of anchor bolts varies depending on the shape, structure, or thickness of the insulation material, but is approximately 100 to 500 mm.
Adjust within the range.

Effects of the invention (1) After pouring and curing the monolithic refractory and removing the frame, there is no need to use a boring machine to drill holes in the lining or drive all anchors, so there is no need to give vibration to the lining, A structurally strong lining that does not cause damage can be obtained, and it is safe and hygienic. (Dust generation during boring, falling drilling debris, vibration propagation to hands, etc. are eliminated.) (2) The work of drilling holes and driving anchors into the lining after removing the frame can be omitted, reducing construction time. and construction costs were reduced by approximately 20%.

(3) Guns are used to drive all-anchors, but it is troublesome because you have to get permission from the prefectural public safety commission that has jurisdiction over your place of residence to own a gun.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of an embodiment based on the present invention, Fig. 2 is a partially enlarged view of Fig. 1, Fig. 3 is a partially enlarged longitudinal sectional view, Fig. 4 is a detailed view of the anchor bolt, and Fig.
The figure is a longitudinal cross-sectional view showing another example of the present invention, FIGS. 6 and 7 are schematic cross-sectional views showing a form setting method, and FIG. 8 is a cross-sectional view of a conventional method. In the diagram: 1...Carbon firing furnace, 2...Shaped steel, 3
...Anchor hardware, 4...Lightweight castable A,
5...Lightweight castable B, 6...MG board,
7...Pyro block, 8...Anchor bolt,
9...Washyah, 10'...Washyah, 10
...Natsuto, 11...Formwork, 12...Support frame, 1
3... Formwork support bolt.

Claims (1)

[Claims] 1 After installing a formwork with anchor bolts bent at one end arbitrarily to secure the washers at regular intervals and prevent them from pulling out, monolithic refractories were poured in, cured, and then molded. A method for supporting a ceiling insulation material, comprising removing a frame, inserting the insulation material into the anchor bolt having a sharp tip, and fixing it with a washer and a nut.