JPH0686846U - Injection pipe for bottom-poured steel ingot - Google Patents

Abstract

(57) [Summary] [Purpose] Eliminate dust pollution and long-term work in high-temperature environments. [Structure] A pedestal part 1, a tubular part 2 and an inlet part 3 are used. The pedestal part 1 is provided with a first tapered hole 1aa which matches the outer peripheral tapered surface 6a of the sleeve brick 6 for the lowermost part which is placed so as to rise upward from the central brick 5 fitted and fixed to the lower pouring surface plate 4. Set up. The cylindrical tube portion 2 is provided with an inner hole 2b for accommodating the sleeve bricks 7 piled up above the sleeve bricks 6 after the pedestal portion 1 is set, and at the lower end thereof, the first tapered hole 1aa of the pedestal portion 1 is connected. Peripheral taper surface 2a that matches the second taper hole 1ab provided in
Also, a similar outer peripheral tapered surface 2c is provided on the upper end. The inlet 3 has a tapered outer peripheral surface 2 provided at the upper end of the tubular portion 2.
A tapered hole 3aa matching c is provided. The tubular tube portion 2 is divided into two pieces in the longitudinal direction, is openable and closable with the pin 2e as a fulcrum, and can be kept closed by the connecting fitting 2f and the cotter g.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an injection pipe used in an ingot making method for producing a bottom poured steel ingot.

[0002]

[Prior art]

 When manufacturing a bottom-pouring steel ingot, molten steel is poured from a ladle into a bottom-pouring platen through a pouring pipe, and is guided into a mold through a runner provided in the bottom-pouring platen. By the way, the runners formed on the pouring pipe and the surface plate for the bottom pouring are formed by fitting the runner bricks into the pouring pipe and the surface plate for the bottom pouring. It is fixed to the surface plate for bottom pouring by filling sand and amorphous castable refractory into the side and bottom of the runway brick.

However, such a fixing method has a problem of pollution due to dust and long-time working in a high heat environment. In addition, in recent years, it has become difficult to collect river sand due to improvements in the global environment, etc., and there is also the problem that replacement of this will lead to high costs.

[0004] Therefore, in the case of the surface plate for under-pouring, a method of fixing sand without filling the sand or the castable refractory having a castable refractory material after the insertion of the runway brick is widely used, and the working time is drastically shortened. The problems described above have been improved.

[0005]

[Problems to be solved by the device]

 However, for injection pipes, it is difficult to adopt a method of fixing sand and castable refractory of irregular shape by omitting the work of packing, and the above-mentioned problems remain as they are.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an injection pipe that can be fixed by omitting the work of packing sand or amorphous castable refractory material.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the injecting pipe for the bottom pouring steel ingot of the present invention is a bottom brick of the bottom sliding block which is placed so as to rise upward from the central brick fitted and fixed to the bottom pouring plate. A pedestal part having a first tapered hole that matches the outer peripheral tapered surface, an interior hole for accommodating the sleeve bricks stacked in sequence above the sleeve brick after setting the pedestal part, and a pedestal part at the lower end are provided. And a cylindrical pipe portion having an outer peripheral tapered surface matching the second tapered hole formed subsequent to the first tapered hole, and a similar outer peripheral taper surface at the upper end, and the cylindrical pipe portion. It is composed of an injection port portion provided with a taper hole that matches the outer peripheral tapered surface provided at the upper end of the tube.

[0008]

[Action]

 Since the injecting pipe for the bottom pouring steel ingot of the present invention is configured as described above, the outer circumference taper of the bottommost three-layer brick is placed so as to rise upward from the central brick fitted and fixed to the bottom pouring platen. Align the first taper hole of the pedestal part with the surface, then store the sleeve bricks piled up on the upper part of the lowermost sleeve brick in the interior hole of the tubular pipe part, and the outer circumference provided at the lower end. Match the taper surface to the second taper hole provided following the first taper hole of the pedestal part, and finally match the taper hole of the injection port part to the outer peripheral taper surface provided at the upper end of the tubular part. The setting work of the injection tube is completed only by making it.

[0009] Further, in the work of disassembling the injection pipe after the casting is completed, the injection pipe is lifted and removed, and then the pipe pipe is lifted in a state in which the pipe pipe can be divided into two and only the pipe pipe is removed. Just lift the sleeve brick and the pedestal unit that are integrated with the metal attached to the runner, remove this sleeve brick and the pedestal together from the surface plate, and finally remove the pedestal unit from the three-layer brick. Good.

[0010]

[Embodiment] An injection pipe for a bottom pouring steel ingot according to the present invention will be described below with reference to an embodiment shown in the accompanying drawings. FIG. 1 is a front view of a case where the lower pouring steel ingot injection pipe of the present invention is assembled, and FIG. 2 is a view of the right side of FIG. 1 when the downward pouring steel ingot injection pipe of the present invention is divided into three parts. FIG. 3 is an explanatory view when the pedestal part is set on the lower pouring surface plate, and FIG. 4 is an explanatory view when the tubular pipe part is set on the pedestal part.

In the drawings, reference numeral 1 is a pedestal portion, 2 is a tubular pipe portion arranged on the upper portion of the pedestal portion 1, and 3 is an injection port portion arranged on the upper portion of the tubular pipe portion 2. The injection pipe for the poured steel ingot is constructed.

The pedestal portion 1 is provided with a hole 1a penetrating vertically, and the lower half of the hole 1a, for example, is the upper part of a central brick 5 fitted and fixed in the central position of the lower pouring surface plate 4. Is formed as a tapered hole (hereinafter, referred to as “first tapered hole”) 1aa that matches the outer peripheral tapered surface 6a of the lowermost sleeve brick 6 to be mounted on the uppermost half, and the upper half is provided at the lower end of the cylindrical tube portion 2. A tapered hole (hereinafter, referred to as a "second tapered hole") 1ab that matches the outer peripheral tapered surface 2a is formed. Further, a hanging handle 1b is provided on the outer periphery of the pedestal portion 1 so as to project.

In addition, the cylindrical tube portion 2 is provided with an inner hole 2b for accommodating the sleeve bricks 7 sequentially stacked on the uppermost part of the sleeve brick 6 for the lowermost part, and an outer peripheral tapered surface provided on the lower end at the upper end thereof. Similar to 2a, an outer peripheral tapered surface 2c is formed so as to match the tapered hole 3aa formed in the lower half of the hole 3a penetrating vertically in the injection port 3. In addition, the cylindrical tube portion 2 is divided into two pieces in the longitudinal direction and can be opened and closed with a pin 2e rotatably supported by a bearing 2d arranged near one of the dividing surfaces as a fulcrum. In addition, the closed state can be maintained by the connecting fitting 2f disposed near the other split surface and the cotter 2g inserted through the connecting fitting 2f. It should be noted that hanging handles 2h and 3b similar to those for the pedestal 1 are provided at required positions on the outer circumferences of the cylindrical tube portion 2 and the injection port portion 3 in a protruding manner.

Next, a method for setting the injecting pipe for ingot pouring steel ingot of the present invention having the above-mentioned configuration on the underpouring platen 4 will be described step by step. The sleeve for the lowermost part placed on the central brick 5 fitted and fixed to the lower pouring surface plate 4 The pedestal part 1 is hung on the outer peripheral taper surface 6a of the brick 6 with, for example, a crane, and the first The tapered holes 1aa are matched.

Next, after the pedestal part 1 is set, the sleeve bricks 7 are sequentially stacked on the upper part of the lowermost sleeve brick 6 to a certain height. After that, the closed tubular pipe portion 2 is hung by, for example, a crane to store the piled sleeve bricks 7 in its interior hole 2b, and the outer peripheral tapered surface 2a provided at the lower end of the sleeve brick 7 is pedestal portion. Align with the 1st 2nd taper hole 1ab.

Finally, the inlet port 3 is suspended by a crane so that the tapered hole 3aa is aligned with the outer peripheral tapered surface 2c provided at the upper end of the tubular portion 2. This completes the work of setting the injection tube. At the time of this setting work, the gap between the outer peripheral tapered surface 6a of the lowermost sleeve brick 6 and the first tapered hole 1aa of the pedestal portion 1 and the like is very small, but in the present invention, Since the injection tube is divided into three parts, this can be done easily.

In addition, for the work of disassembling the injection pipe after the casting is completed, after the injection port 3 is lifted by a crane and removed from the tubular pipe portion 2, the cotter 2g is pulled out from the connecting fitting 2f to remove the tubular pipe portion 2. Only the tubular pipe portion 2 is removed, leaving the sleeve brick 7 integrated with the metal attached by lifting it with a crane in a state where it can be split into two.

Next, the sleeve bricks 7 and the pedestal 1 integrated with the runner adhering metal contained in the tube portion 2 were lifted together by a crane, and these were removed from the underpouring surface plate 4. After that, the pedestal part 1 is finally removed from the sleeve brick 7. If the cylindrical tube portion 2 has an integral shape, the adhered metal will fill the gaps in the sleeve brick 7 and expand, making it impossible to extract only the cylindrical tube portion 2. Since it is divided into two parts, only the tubular tube portion 2 can be easily pulled out.

By the way, by adopting the injecting pipe for the bottom pouring steel ingot of the present invention, the sand filling work can be omitted at the time of setting work, and the work time can be shortened accordingly, and at the time of disassembling work, the amount of sand not used can be reduced. since there is no debris, the processing is eliminated, overall, the amount of dust in the working environment and reduces the conventional 3.58mg / m ³ to 0.63 mg / m ³ at a geometric mean concentrations.

[0020]

[Effect of device]

 As described above, according to the casting pipe for the bottom pouring steel ingot of the present invention, the sand filling work can be omitted, so that the generation of dust can be significantly reduced, and the working time at the time of setting or disassembling can be greatly reduced. It can be shortened and is useful for improving the working environment.

[Brief description of drawings]

FIG. 1 is a front view of an assembly of a casting pipe for a bottom poured steel ingot according to the present invention.

FIG. 2 is a view from the right side of FIG. 1 in the case of dividing the casting pipe for the lower poured steel ingot of the present invention into three parts.

FIG. 3 is an explanatory diagram for setting a pedestal portion on a surface plate for under-pouring.

FIG. 4 is an explanatory diagram of a case where a cylindrical tube portion is set on a pedestal portion.

[Explanation of symbols]

 1 Pedestal 1aa 1st taper hole 1ab 2nd taper hole 2 Cylindrical tube part 2a Outer peripheral taper surface 2b Inner hole 2c Outer peripheral taper surface 2e Pin 2f Connecting metal fitting 2g Cotter 3 Pouring part 3aa Taper hole 4 Bottom pouring surface plate 5 Center brick 6 Sleeve brick for the bottom 6a Outer taper surface 7 Sleeve brick

Claims (1)

[Scope of utility model registration request] 1. A pedestal portion provided with a first tapered hole that matches an outer peripheral tapered surface of a sleeve brick for the lowermost part, which is placed so as to rise upward from a central brick fitted and fixed to a lower pouring surface plate, After setting the pedestal part, an inner hole for accommodating the sequentially stacked sleeve bricks is provided on the upper part of the sleeve brick, and a second tapered hole provided at the lower end subsequent to the first tapered hole of the pedestal part is provided. Consists of a cylindrical pipe portion having a matching outer peripheral taper surface and a similar outer peripheral taper surface at the upper end, and an injection port portion having a tapered hole matching the outer peripheral taper surface provided at the upper end of the cylindrical pipe portion. The tubular pipe portion is divided into two parts in the longitudinal direction and is divided into two parts.