JPS5932782Y2 - Water cooling pipe protection member - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an improved protection member used for heat insulation protection of water-cooled pipes such as heating furnaces, particularly riser pipes, crossover pipes, skid pipes, and the like.

Conventionally, as a technique for insulating and protecting a water-cooled pipe such as a heating furnace from a high-temperature atmosphere and scale using a pre-formed protective member, there have been two methods: (1) a method of protecting water-cooled pipes such as heating furnaces from high-temperature atmospheres and scales, etc., with the same curvature as a skid pipe, as described in Japanese Utility Model Publication No. 4023170; On the inside of an unburnable basic brick with a fan-shaped side surface, welded a steel plate that has been processed into the same arc surface as the skid pipe and has a suspension part for the skid pipe on the upper blade part, to form a box shape. (2) Contact with a protective hanging brick filled with fireproof insulation material, or (2) a metal plate pipe curved to match the curved surface of the pipe to be protected as described in Japanese Patent Publication No. 32-2130. A protective force method in which metal aggregates are welded to the opposite side of the pipe, and firebricks are attached via these, and a reinforced firebrick protector is welded to the pipe to surround it, and (3)
A so-called H-shaped fireproof covering block (4) having a recess between one pair of legs and a convex portion between the other pair of legs is disclosed in Japanese Utility Model Publication No. 4942641 (1988). 13041
A fireproof insulation block for covering a water-cooled pipe, which is described in Publication No. 2, is provided with a clip for integral assembly at the end of a hollow pipe divided in the circumferential direction, and the outer surface of the pipe is coated with fireproof insulation felt and a refractory material. However, all of them have the following drawbacks.

In (1), the shape of the protective member is complicated, so it is difficult to manufacture and the manufacturing cost is high.

Furthermore, in order to attach this, it is necessary to separately weld a hanging hardware to the skid pipe and stamp the upper half of the pipe with a stamping material, which requires labor and lengthens the construction period.

Also, it cannot be applied to vertical riser pipes.

(2) As shown in Fig. 1, weld 12 directly to the riser pipe 15, which is a so-called protection member, form an annular body 16, and then apply the same procedure to the upper force (indicated by chain lines).
First, it requires more manpower and the construction period becomes longer.

Further, the riser pipe 15 may be damaged when the protective member is attached or removed for repair.

Although the block (3) is easy to install, it is difficult to manufacture because of its complicated shape, and cracks tend to form at some corners during use.

In addition, it is difficult to install it on a horizontal lossover pipe, and it is likely to fall off due to cracks.

In (4), the clip provided at the end easily comes off and has a short lifespan, and it is impossible to attach it to a skid pipe due to its structure.

Therefore, if we judge these things comprehensively, it is as follows.

■ Protective members with simple locking means will shorten the construction period, but if vertical cracks occur during operation, they are likely to fall off the water S pipe, and those with relatively complex locking means will shorten the service life. However, the construction period will be longer and construction and repair costs will be higher.

@ If the shape of the protective member is simple, the insulation effect will be insufficient, and if it is complicated, it will take time to manufacture and install, and concentrated stress will easily occur in some corners, which will shorten the service life. It's short.

The present invention provides an improved protective member for use in water-cooled pipes of heating furnaces, etc., which solves all of these problems. The bent portions 14 and 14' are provided on the outside at right angles to the tangential force direction at both ends 3°3' of the tangential force direction.
, at least one pair or a plurality of pairs of engagement pin insertion holes 2 are arranged symmetrically and parallel to the axis 4 of the inner metal plate 1, and a fireproof member 6 is integrally formed on the outside of the inner metal plate 1. The water-cooled pipe protection member 9 has the following features: (1) It is easy to manufacture and install, and can be performed reliably.

That is, as will be described later, it can be easily manufactured using known techniques, and it can be installed on heating furnace riser pipes and the like by an extremely simple method, as will be described later, and is resistant to vibrations and cracks.

(2) Construction when newly installing a heating furnace, etc., or partial repair can be easily performed, so construction labor can be saved, construction period can be shortened, and construction costs can be reduced.

In other words, by reducing labor costs, which have skyrocketed in recent years, it is possible to reduce construction costs, and by shortening the period of partial repair in the event of damage, it is possible to minimize the decline in operating rates due to suspension of operations. can.

(3) In the case of the same diameter, the insulation protection of vertical water cooling pipes (riser pipes) and horizontal water cooling pipes (crossover pipes and skid pipes) can be carried out by a type of protective member, so manufacturing control, You can save labor in inventory management and maintenance work.

(4) By adopting a so-called double-layer insulation structure, water-cooled pipes can be completely insulated and protected from high-temperature atmospheres and scales, which not only extends the life of water-cooled pipes but also minimizes heat loss to the cooling water. This makes it possible to reduce fuel costs.

Hereinafter, the present invention will be explained in detail with reference to the drawings.

First, as shown in FIGS. 2 and 3, the inner metal plate 1 used in the present invention is not directly exposed to a high temperature atmosphere, so heat resistance is not so much of a problem.
Any steel plate, iron plate, stainless steel plate, etc. with a diameter of approximately 1.0 mm may be used, but those with extremely low thermal conductivity are unsuitable.

The inner metal plate 1 is designed so that the outer periphery of the water cooling pipe whose width is to be protected is divided into 3 to 4 equal parts, and the length is 200 to 200 mm.
300mm extremely cut square or rectangular steel plates, etc., are placed in close contact with the outer circumferential surface of the pipe to be protected.
It is curved to a required curvature using a known technique.

Further, the upper and lower portions of the bent portion 14, which is formed by bending the double-edged side ends 3°3' of the inner metal plate 1 outward at right angles to the direction of tangential force, are adjusted to the thickness dimension of the engaging pin 13 as shown in FIG. A cutout portion 8 is provided by cutting out the cutout larger than the size of the cutout.

Incidentally, the bent portions 14 and 14' may be manufactured separately from the inner metal plate 1 and arranged as described above by welding or the like.

Next, a known locking hardware 5 (for example, a Y-shaped stainless steel plate,
A water-cooled pipe constructed integrally with a suitable fireproof member 6 (including a fireproof insulation material, regardless of whether it is a fixed or irregular shape) by appropriately arranging Y-shaped or coil-shaped metal fittings. The protection member 9 can be implemented using the following methods.

That is, in order to form the engagement pin insertion hole 2, the inner metal plate 1, on which a foamed polystyrene plate of the required size is attached to a predetermined position on the outside of the bent portions 14, 14', is fixed with its outer surface facing upward. After fitting a wooden frame or metal frame of the desired shape to this,
Fill with a known stamp material or caster fill using a small air rammer or vibrator, and then dry.

By drying, the foamed polystyrene plate melts away and the engagement pin insertion hole 2 is formed.

In addition, castable is filled on the outside of the inner metal plate 1, which is separately produced and welded to a box-shaped member made of 7J steel, at a predetermined position on the outside of the bent portions 14, 14', and an engaging pin insertion hole 2 is formed. It's okay.

In this case, if a known heat insulating material 7 (for example, a blanket-like heat insulating material) is placed on the outside of the inner metal plate 1 before filling and then filled, the heat insulating effect can be further enhanced. .

In addition, the fireproof member 6 can be formed by press-molding a known basic composition and integrally formed with the inner metal plate 1, but in either case, the fan-shaped surface 10 and the side surface 1
If the structure 1 is provided with irregularities (so-called tabs) as necessary, the strength of the structure after construction can be further increased and the intrusion of the frame and scale can be prevented.

Furthermore, as shown in FIG. 4, when processing the water-cooled pine protection member 9 into a riser pipe or the like, the material of the engaging pin 13 used may be the same steel plate as the inner metal plate 1, or may be a stainless steel plate in some cases. can also be used.

In addition, the shape is generally U-shaped or U-shaped in longitudinal section, and the length is 5 to
A shorter length of about 10 is better.

Moreover, the engagement pin 13 having a circular cross section can also be used in the engagement pin insertion hole 2 having an elliptical cross section.

Next, referring to FIG. 5, a construction force method for the water-cooled pipe protection member 9 of the present invention will be explained.

For example, first, the first water cooling pipe protection member 9-1 is placed on the base 21 of the upright riser pipe 15, brought into close contact with the outer peripheral surface of the riser pipe 15, which is the inner metal plate 1, and then,
Bring the side surface 11 of the second water-cooled pipe protection member 9-2 into close contact with the side surface 11 of the first water-cooled pipe protection member 9-2, and insert the engagement pin 13 into the engagement bottle insertion hole 2 from the upper blade (arrow). , to be installed in succession.

By the same procedure, the third and fourth water cooling pipe protection members 9-3 and 9-4 are engaged, and finally, the side surfaces 11 of the first and fourth water cooling pipe protection members 9-1 and 9-4 are engaged. They are brought into close contact with each other and engaged with the engaging pin 13 to completely surround the riser pipe 15 to form an annular body 16.

In addition, in advance, the first to fourth water cooling pipe protection members 9-1 to 9
-4 may be separately engaged in a band shape with an engagement pin 13, surround the riser pipe 15 at a time, and engage with the engagement pin 13 to form an annular body 16.

Next, the second stage (indicated by the chain line) is also created using the same procedure.
The water cooling pipe protection member 9 is attached to the riser pipe 15 to form an annular body 16.

In this case, a known mortar may be used for the joints between the water-cooled pipe protection members 9 and the joints between the first stage and the second stage, if necessary.

In addition, when the water-cooled pipe protection member 9 has unevenness that engages with the protection member 9 adjacent to the upper and lower fan-shaped surfaces 6 and/or the double-edged side surfaces 11, it is necessary to ensure a sufficient fit. There is.

Further, if these water-cooled pipe protection members are locally damaged, the damaged portion can be removed and repaired easily by the above-mentioned method.

The present invention will be explained in more detail with reference to Examples below.

Example 1 The riser pipes (outer diameter 152.4 mm, height 2.0 to 2.5 m, total 72) of a 130T/H thick heating furnace at a certain steelworks were made in advance with the same curvature (radius 76. 2mm) curved inner metal plate (4.5mm thick, arc 169.6mm x length 300m)
25 mm at right angles to the tangential force direction on both side edges of the steel plate
Bend it outward to form a bent part, and 15m above and below it.
A styrofoam plate (length 10 m) is provided on the outside.
Attach Y-shaped hardware [made of stainless steel (SUS304), height 60Il] (eight IIn) in a staggered pattern on the outside of the inner metal plate. Blanket-like insulation material (thickness 12mm)'a
= Layered on one side by known means, and on the outside,
Clay stamp material (Al'0 43.0%, 5in2
49.0%) to a thickness of 66 mm, dried and melted away the Styrofoam plate, and a water cooling pipe protection member with an engaging bottle insertion hole formed with an engaging pin [length 170 mm x width]. Using a 20 mm x 5 mm thick steel plate processed into a U-shape with a length of 80 mm, each piece was constructed using the method described above.

Significant material savings (no construction frame or mortar required) and shortened construction period (50φ reduction) have been achieved, and the service life has also been reduced to 30.
Lifespan extended by more than %.

Example 2 As shown in Fig. 6, a skid pipe 17 (outer diameter 165.2 mm, length 2
9m1, 12 pieces in total), the inner metal plate (thickness 4.5 mm, circular arc 179.6
Bent parts and notches similar to those in Example 1 were provided on both sides of a steel plate (length 80 mm x width 25 mm x thickness 6 mm) on the outside of the bent parts.
) was attached to four locations, a blanket-like heat insulating material (thickness 12 mm) L was applied on the outside of the inner metal plate by known means, and clay of the same material as in Example 1 was further applied on the outside. A water-cooled pipe protection member 9 is stamp-molded into a 66 mm thick piece of quality stamp material, and the Styrofoam plate is melted away by drying, and an engagement pin insertion hole is formed.
-1 to 9-3 Example 1 The upper and lower parts are engaged with the engaging pin 13 having a length of 60 mm to form a band shape.

Next, this is brought into close contact with the lower surface of the skid pipe 17, and the engaging pin insertion holes of the first and third water cooling pipe protection members are connected to the stopper welded in advance to a predetermined position of the skid pipe 17. ! 118 and wo are fixed using an engaging pin.

This process is repeated in the longitudinal direction, and finally clay castable 19 (AlO46,0 wt%, S1
02 44.0wt%)3.

Significant material savings (no construction frame or mortar required) and shortened construction period (60% reduction) have been achieved, and the service life has also been reduced to 2.
The lifespan was extended by more than 0% and fC8 As detailed above, the water cooling pipe protection member of the present invention has a simple structure and is easy to manufacture and install, so it can shorten the construction period and reduce construction costs, especially when repairing locally damaged parts. It is extremely useful industrially, as it has the secondary effect of improving the operating rate by omitting the so-called drying step before operation.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view showing a conventional embodiment, FIGS. 2 to 6 are embodiments of the present invention, FIG. 2 is a water cooling pipe protection member, and FIG. A schematic front view of the inner metal plate used for the water cooling pipe protection member, b) is a schematic plan view, Fig. 4 is an external view of the engagement pin, and Fig. 5 is installation on the riser pipe! FIG. 6 is a partially cut-away perspective view showing the construction procedure for a skid pipe which is a modification of the present invention. In the figure, 1... Inner metal plate, 2... Engagement pin insertion hole, 3, 3'... Side end, 4...
... Axis, 5 ... Locking hardware 6 ... Fireproof member, 7 ... Heat insulation material, 8 ... Notch 9 ... Water cooling pipe protection member, 9-1 to 9-4
...First to fourth water cooling pipe protection members, 10.
...Fan shaped surface, 11...Side surface, 12...
...Welded portion 13...Engagement pin, 14, 14
'...Bending portion, 15...Riser pipe, 16...Annular body, 17...Skid pipe, 18...Fitting hardware, 19...
... Clay castable, 20 ... Skid button 21 ... ... The base is shown respectively.

Claims (1)

[Scope of utility model registration request] The axis of the inner metal plate 1 is located on the outside of the bent portions 14 and 14' provided on the outside at right angles to the tangential force direction at both ends 3 and 3' of the inner metal plate 1, which is bent to a required curvature. 4, at least one pair or plural pairs of engagement pin insertion holes 2 are arranged symmetrically and parallel to each other, and a fireproof member 6 is integrally formed on the outside of the inner metal plate 1.