JPH0235405Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an improvement in the housing structure for the slide plate and chute nozzle of a slide valve that is attached to the bottom of a molten metal container and used to control the flow rate of molten metal.

BACKGROUND TECHNOLOGY Recently, from the viewpoint of labor saving, it is required to simplify and speed up the work of assembling bricks into slide valves, so a method has been adopted in which a slide plate and a shoot nozzle are integrated and set. Conventionally, the method of integration is as shown in Fig. 1, where the side and bottom surfaces of the slide plate 2 and the shoot nozzle 3
A structure in which a slide valve refractory 1 that integrates a slide plate 2 and a shoot nozzle 3 using a filler 7 such as mortar or castable is set in an integrally molded metal case manufactured to enclose the sides of the valve. is common.

Problems to be solved by the invention However, the conventional method has the following problems: (1) The slide valve refractory 1 is set in the integrally molded metal case 6 without filling it with a filler 7 such as mortar or castable. Let's do it. Therefore, it is difficult to maintain parallelism between the sliding surface 8 of the slide plate 2 and the bottom surface 9 of the metal case 6 due to the fluidity at the time of setting.

(2) It takes a long time of 1 to 2 days for the filler 7 such as mortar or castable to completely harden.

(3) The integrally molded metal case 6 requires expensive press molding equipment to manufacture, which results in high costs when producing in small quantities.

Therefore, there is a need for a refractory storage structure for a slide valve that is easy to set, takes no time to set, and can be manufactured at low cost even in small quantities.

Means for Solving the Problems The purpose of the present invention is to provide a refractory housing structure for a slide valve that solves the above-mentioned problems, and the technical configuration of the present invention is as specified in the claims for utility model registration. It is.

An embodiment of the present invention will be explained based on the accompanying drawings.

As shown in Fig. 2, a shoot nozzle 3 has a slide plate 2 and a nozzle hole 5 connected to each other and integrated.
In a refractory for a slide valve, the outer peripheral surface of which is covered with a metal plate, a metal hoop 12 is encircled and fastened around the side surface of the slide plate 2, and a metal pipe or Metal plate 1 to which case 14 is fixed
3 is attached, a castable 15 is filled in the gap between the shoot nozzle 3 and the metal pipe or case 14, and a metal hoop 12 and a metal plate 13 are spot welded.

The refractory housing structure for a slide valve according to the present invention is manufactured by the steps shown in FIG. 3A to D.

(a) There is a metal hoop 1 on the side of the slide plate 2.
2 by welding or shrink fitting, and insert it into the nozzle hole 4 on the bottom of the slide plate 2.
Apply mortar to the upper recessed part of the shoot nozzle 3 and press it against the bottom surface of the slide plate 2, and let the mortar harden.
A chute nozzle 3 is fixed to and integrated to form a slide plate refractory 1.

(b) A metal plate 13 on which an alumina adhesive (not shown) is applied to the bottom surface of the slide plate 2 and a metal pipe 14 surrounding the shoot nozzle 3 is welded thereto.
Paste. It can be fixed in a short time of about 1 hour.

(c) Castable 15 kneaded with a moisture content of 15 to 16% is poured into the gap between the shoot nozzle 3 and the metal pipe 14 to fill it. It is completely cured by one day of natural drying and one day of drying with a dryer, and the metal case consisting of the slide valve refractory 1, metal plate 13, and metal pipe 14 is firmly fixed.

(d) The metal hoop 12 circumferentially fastened to the side surface of the slide plate 2 and the metal plate 13 adhered to the bottom surface of the slide plate 2 are integrated by spot welding 16. Since the slide valve refractory 1, the metal plate 13, and the metal pipe 14 are firmly fixed, they can sufficiently withstand the thermal stress of spot welding and are not affected by it.

Conventionally, the case has a so-called integrated case structure as shown in FIG. 1, but the present invention has a so-called separated structure, and as shown in FIGS.
2 and the metal plate 13 are spot welded 1 in groups at intervals.
6 is also a characteristic technical configuration.

Conventionally, the butt portions of the metal hoop 12 and the metal plate 13 are continuously welded, and this welding takes at least 30 minutes and the metal plate 13 is greatly deformed by the heat during welding. It is known that when a slide plate is set in a slide case, the surface accuracy deteriorates and it is often impossible to actually use it.

However, as mentioned above, the present invention uses group spot welding at intervals, and the welding work can be completed in about 15 minutes, which improves productivity in assembly work and reduces deformation due to heat compared to the conventional method. Since there is almost no surface, the surface accuracy when setting is excellent and 100%
Available for use. These group spot welds are made up of three spot welds spaced apart by 5 mm, making the spot weld length 10 mm, and it is preferable to arrange these group spot welds in 8 to 15 groups around the entire circumference of the slide plate. There is a problem with strength, and if there are more than 15 groups, it will take a lot of work, and it is not necessary in terms of strength.

Note that a heat-resistant flexible sheet may be attached to the surface of the metal plate 13 that is opposite to the bottom surface of the slide plate 2 and comes into contact with the slide case of the slide valve device.

Effects of the invention In this way, since the metal plate 13 is bonded directly to the bottom surface of the slide plate 2, it is easy to maintain parallelism between the sliding surface 8 of the slide plate 2 and the bottom surface 17 of the metal plate 13, and the bonding is quick. can be done. The structure of the present invention does not require press forming equipment that uses special molds, and can be easily manufactured from commercially available metal pipes and metal plates using common cutting and welding tools, and has practical effects. It's a big idea.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a conventional metal case for a slide valve refractory, FIG. 2 is a longitudinal cross-sectional view of a refractory housing structure for a slide valve according to the present invention, and FIG. 3 is a manufacturing procedure diagram of the housing structure according to the present invention. In the figure, 1... refractory for slide valve, 2...
Slide plate, 3... Shoot nozzle, 12
... Metal hoop, 13 ... Metal plate, 14 ... Metal pipe, 15 ... Castable, 16 ... Welding part, 17 ... Bottom surface of metal plate 13.

Claims (1)

[Scope of utility model registration request] In a refractory for a slide valve in which the outer peripheral surface of a chute nozzle 3 integrated with a slide plate 2 is covered with a metal plate, a metal hoop 12 is surrounded and fastened around the side surface of the slide plate 2, and the bottom surface of the slide plate 2 is A metal plate 13 to which a metal pipe or case 14 surrounding the shoot nozzle 3 is fixed is attached to the metal plate 13 to which a metal pipe or case 14 surrounding the shoot nozzle 3 is attached, and a caster plate 1 is attached to the gap between the shoot nozzle 3 and the metal pipe or case 14.
5, and a metal hoop 12 and a metal plate 13 are spot-welded.