JPS5850949B2 - Ultra-thin lining method for monolithic refractories for pipe-like objects such as steel pipes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a technique for lining a pipe-like object such as a steel pipe with a monolithic refractory.

When lining a pipe-like object such as a steel pipe with a monolithic refractory, the thickness of the lining is usually 20 mm to 50 mm or more. The amorphous refractory material is poured into the mold through the upper opening, and the mold is filled by pushing with a protruding rod or applying vibration.

Since this method uses a formwork, efficient lining according to the specified thickness can be expected.

If this method is used, unless special material adjustments are made, clogging will occur and filling will be inconvenient.If the inning thickness is extremely thin, troweling monolithic refractories,
Alternatively, a method has been adopted in which the pipe is immersed in a slurry-like monolithic refractory to resist adhesion.

Needless to say, with this method, efficient lining that is uniform and has a thickness that meets specifications cannot be expected.

Now, most of the pipes are long such as 3m to 4m, and the specification lining thickness is 3m to 20mm.
In the case of ultra-thin walls of L, the latter method described above is inappropriate from the viewpoint of meeting specifications and efficiency, so in the former method, the particle size of the monolithic refractory material must be strictly adjusted. However, in reality, the passage distance of the filling slit from one end of a long pipe to the other is extremely long, so there is a slight gap between material particles. This tends to cause clogging, making it difficult or impossible to fill the material quickly.

The present invention has been made in view of the above-mentioned circumstances, and provides a new technology for lining ultra-thin monolithic refractories for pipe-like objects such as steel pipes with high efficiency and in accordance with specifications.

In other words, a split-type formwork designed to have an ultra-thin wall thickness that surrounds and holds the pipe to be lined is placed horizontally, and the upper part of the formwork is connected to the inside of the formwork. A port is formed, and the monolithic refractory material is filled from the input port by applying vibrations, and the passage distance of the filling gap is only half the circumference of the outside diameter of the pipe, allowing for quick filling. could be expected.

Embodiments of the present invention will be described in detail below with reference to the drawings.

In Figure 1, 1 is a pipe such as a steel pipe to be lined, 2
1 is a horizontally placed two-frame formwork designed to have an ultra-thin lining that surrounds and holds the pipe 1, and the upper abutment part is formed in the hopper 3.

The hopper may have a detachable structure, and may have any structure as long as it can supply the monolithic refractory to the input port.

In addition, the formwork 2 is butt-fastened by hinge opening and closing, bolt tightening, etc. Both ends of the pipe 1 and the formwork 2 contact and the butt part of the formwork 2 are sealed to prevent leakage of regular refractories during vibration molding. It shall be.

FIG. 2 shows an example of adding vibration. In the figure, 4 is a vibration table on which the formwork 2 is placed and supported. A vibration drive source 5 is connected to this, and the vibration drive source 5 is connected to the entire formwork 2 through the vibration table 4. This is an attempt to add vibration.

In the figure, the two-dot chain line representation of the vibration and drive source 5 indicates that the vibration is applied to the formwork 2 simultaneously and not all over, but locally and over the entire area. In this figure, the vibration 1 drive source 5 is first brought into contact with the lower surface of the vibration table 4, which corresponds to one end of the formwork 2 (the left end in the figure), and A case is shown in which local vibration is applied only to one part and the contact position is sequentially moved toward the other end.

Of the three vibration application methods described above, the latter has the following advantages over the former.

In other words, in the former case, the pipe 1 is supported and constructed by the formwork 2 at both ends, so when vibration is applied, resonance occurs in the pipe 1, and the vibration width at the center is The movement becomes a dog, and its movement can naturally disturb the ultra-thin lining, which is uniform and according to the regulations, and its actual operation requires extreme caution. Since it is locally limited, the above-mentioned resonance of the pipe 1 does not occur, and therefore, there are no adverse effects caused by it, and the lining can be uniformly and according to the specified thickness.

That is, first, when applying vibration only to one end of the pipe 1, the resonance of the pipe 1 is suppressed to a small level because the pipe 1 is close to one fulcrum of the formwork 2, and the vibration is uniform in this limited part. , lining as specified is realized.

Next, when vibration is applied at a position adjacent to the vibration 1 drive source 5, the material that has been pierced earlier loses its fluidity and solidifies due to recovery of thixotropy, so this becomes a new fulcrum and the leading part You will enjoy the effects mentioned above.

Therefore, since the vibration is always applied at a location where one end of the pipe 1 is close to the fulcrum, there is no harmful resonance of the pipe 1, and the lining can be applied uniformly and to the specified thickness.

Incidentally, the positional change of the vibration drive source may be caused by the movement of one source, or may be caused by the sequential operation of a large number of sources installed in advance.

[Brief explanation of the drawing]

FIG. 1 is an overhead view of the formwork of the present invention when it is used, and FIG. 2 is a front view when vibration is applied. A simple explanation of the symbols, 1...pipe, 2...
...Formwork, 3...Hopper, 4...Vibration table, 5...Vibration, drive source.

Claims (1)

[Scope of Claims] 1. The pipe to be lined is placed substantially horizontally and in a divided manner,
Furthermore, the mold is surrounded by a formwork having an input port that communicates with the formwork formed in the upper part thereof, and by applying vibration to the formwork, the monolithic refractory material is filled into the mold through the input port. An ultra-thin lining method for monolithic refractories for long pipes such as steel pipes, characterized by: 2. The pipe to be covered and inned is placed almost horizontally and split into sections, and is surrounded and supported by a formwork with an input port that communicates with the formwork at the top, and vibrations are applied to the formwork. An ultra-thin lining method of monolithic refractories for long pipes such as steel pipes, characterized in that monolithic refractory material is filled into the mold from the input port by applying vibration to the formwork. Rather than applying vibration to the entire formwork at the same time, localized vibrations are applied starting from one end of the formwork and sequentially moving the applied position to adjacent positions, applying it to the entire formwork. A lining method characterized by: