JPS6040794B2 - How to construct a sloped ceiling - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for directly applying castable refractory material to a sloped ceiling without an outer shell such as an iron shell in an industrial furnace such as a heating furnace.

For technical reasons, it is difficult or impossible to attach conventional formwork to the sloped ceilings of heating furnaces, etc., so it is constructed using plastic refractory materials that are compacted and formed by ramming using air lasomers, etc. were the majority, and were a good example.

However, this method not only requires a large number of personnel and generates a lot of noise on site, but also makes complete integration difficult from the viewpoint of construction quality, and requires construction using castable refractory materials from the viewpoint of longevity. It was increasing. However, for sloped ceilings without iron sheathing, pouring work is only possible by setting the formwork for the upper and lower frames.

However, in reality, it is extremely difficult to set the upper frame due to the presence of ceiling suspension members such as beams, pipes, and hanger bricks for holding castable refractory materials that have been installed above the ceiling in advance, making castable construction impossible. It was considered possible. From this point of view, ground castable prefabricated panel construction methods have been proposed, such as in Japanese Patent Publication No. 51-939,455, but this requires special preparation of heavy machinery,
The size of a single panel was also limited by itself, and fire could leak from the joints, so it was difficult to actually adopt it. Therefore, in the sloping ceiling of a furnace that does not have an outer shell such as an iron shell, the upper frame is arranged in a square shape between the hanger bricks arranged in a lattice in order to be buried inside the ceiling. A lower frame is arranged at the bottom of the hanger bricks, and caster pull refractory material is poured between the upper frame and the lower frame using lowered frame fixing fittings using the upper hanger brick hanging pipe, which was previously impossible. This is a construction method that makes it possible to carry out construction on areas that were previously covered. An embodiment of the construction method according to the present invention will be described based on FIGS. 1 to 6.

For example, a hanger brick hanging pipe 3 is fixed to an upper structural member 1 of a furnace body such as a heating furnace using a U-shaped hanging bolt 2. This hanger bran tile hanging pipe 3 has a hanger brick hanging fitting 4
to hang the hanger brick 5 (hanger brick 5
The unevenness is for holding the castable refractory material filled in the space 9 formed between the upper frame 7 and the lower frame 8. ). Next, the upper frame lower frame 7a is set on the shoulder 10' of the hanger brick 5 in the furnace width direction (or furnace length direction), and then the upper frame upper plate 7b is placed in the furnace length direction (or furnace width direction). . If the hanger brick does not have a shoulder 10, attach a suitable holding part 11 such as wood or wire to the hanger brick so that the upper frame lower frame 7a hangs thereon, or attach a suitable long piece with protrusions 13 to the hanger brick. An upper frame support rod 12 such as a bolt may be used.

That is, the weight of the upper frame 7 is supported by the shoulder portion 10 or the holding member 11 or the protrusion 13 of the hanger brick 5.

Next, the amount of frame fixing bolts 4 are set by penetrating the upper frame upper plate 7b and the upper frame lower slope 7a. In this set, the upper end 14b of the frame fixing bolt 14 can be directly hooked by drilling a hole in the hanger brick hanging pipe 3, but it is recommended to If the auxiliary angle 15 is used as in this embodiment, the number of frame fixing bolts 14 can be reduced and it is effective. The frame 8 is set from below.Usually, the lower frame 8 is set in close contact with the lower surface of the hanger brick 5 by adjusting the nut 17.

Next, the upper frame fixing fittings 20 are attached to the frame fixing bolts 14 in contact with the upper frame upper plate 7M. This may be held with a clip or tightened with a wire. This is to prevent the upper frame 7 from being pushed upward by the castable refractory material during pouring construction. In addition, as a method of holding down the upper frame 7, it is also possible to use a shank 21 and a straw 22 made of wood or the like.

It may also be used in combination with the method using clips. Incidentally, delicate adjustment of the setting condition of the frame can be made freely by tightening (or loosening) the nuts 17 and 18. Once the hanger bricks 5, upper frame 7, and lower frame 8 have been fixed in this way, caster pull refractory material is poured through an opening appropriately provided above the sloping ceiling.

At this time, it would be even more effective to mechanize pump construction. The frame is removed after an appropriate curing period (usually 24 to 4 years) depending on the castable refractory material.

In this procedure, first the lower nut 17 and washer 16
, and remove the lower frame 8. After that, the upper frame fixing fitting 20 is removed and the frame fixing bolt 4 is pulled out upward. This can be easily removed by twisting it a little. After this, if the auxiliary angle 15 or the like is used, it is removed. Next, the upper frame upper plate 7b and the upper frame lower plate 7a are removed. In addition, frame fixing bolt 1
It is sufficient to fill the hole after removing No. 4 with a monolithic refractory material such as ceramic fiber or mortar.

This completes the construction of the slanted ceiling. In this way, it has become possible to pour castable fireproofing materials into slanted ceilings without iron sheathing, which was previously considered impossible. can.

In other words, ``According to the present invention, there is no restriction on the angle of slope of the sloped ceiling (it is possible, of course, in the case of a horizontal ceiling as well as in the case of an angle of 00), and it is extremely easy to carry out the work without the need for special training during frame hanging work. Compared to conventional plastic refractories, it has remarkable effects such as improved construction quality (extended furnace life) due to complete integration and high-density filling.

[Brief explanation of the drawing]

The drawings are diagrams for explaining one construction method according to the present invention, and "Figure 1 is a plan view of the sloping ceiling, Figure 2 is a vertical sectional view, and Figures 3 and 4 are detailed views of the hanger brick part. Figure 4 shows the frame set using upper frame support rods such as long bolts with protrusions. Figure 5 is a three-dimensional view of the frame when it is hung, and Figure 6 shows the holding member attached to the hanger brick. Shows the condition when attached.3...
Hanger brick hanging pipe, 4... Hanger brick hanging fitting, 5... Hanger brick, 7a...
Upper frame lower plate, 7b... Upper frame upper plate, 8... Lower frame, 1
4... Frame fixing bolt, 20... Upper frame fixing bracket. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1 A plurality of hanging pipes suspended from above the furnace body in an inclined state are arranged in a row at predetermined intervals in the diameter direction, and hanger bricks are suspended at predetermined intervals in the length direction of the pipes. , a construction method in which a predetermined range of the hanger bricks is buried with castable refractory material to form a sloped ceiling of the furnace body,
The lower frame plate is arranged in an inclined manner so as to be in contact with the lower side of the hanger bricks suspended above the furnace body, and the upper frame plate is arranged along the inclined surface of the lower frame plate between adjacent hanger bricks. 1. A method for constructing a sloped ceiling, comprising: laying a castable refractory material in a shape, and pouring a castable refractory material between the upper and lower facing surfaces of the upper frame plate and the lower frame plate to construct a sloped ceiling of a furnace body.