JPS6236844Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a gas blower used for blowing gas such as argon into molten metal.

[Prior art]

Normally, gas blowing parts with porous bricks or gas blowing parts with slits are shown in Figure 1a.
As shown in Figure 1b, the element brick 1 is hardened with monolithic refractory material 2, etc. and a metal case 3 is attached to it, or as shown in Figure 1b, the element brick 1 is directly fitted into the metal case 3. I have something to wear. However, in such a configuration, if the element brick 1 is a right circular cylinder or a rectangular parallelepiped, or if its taper is small, the element brick may jump out to the working surface side due to the gas pressure on the gas header side. This causes accidents such as steel leakage. In particular, as shown in Fig. 1b, even if the gas blowing part has mortar joints 4, the mortar disappears (for example, the mortar is crushed by the impact during operation, and the gas blowing part has mortar joints 4). There is a good chance that the bricks will pop out due to reasons such as gas flowing in, pushing the mortar out of the gas injection area and creating voids in the mortar joints, or elongation of the metal case during hot heating. To deal with this, conventional gas blowing bodies used in ladles, converters, etc. are made by binding the ventilation element bricks 1 with wires 5 to form an appropriate wire ring, as shown in Figure 2a. The ring is embedded in the monolithic refractory 2, or as shown in Fig. 2b, the stepped element brick 1 is embedded in the monolithic refractory 2 to prevent the element brick 1 from flying out. .

However, in this configuration, since the element bricks 1 are connected to each other, the effect of preventing popping out is not sufficient.

[Purpose of invention]

The present invention is intended to solve the problems of the prior art, and its purpose is to provide a gas blower that can reliably prevent the element bricks from flying out.

[Structure of the idea]

In order to achieve the above object, in the present invention, the filling refractory of the metal case is composed of a plurality of divided pieces including the gas blowing body and the monolithic refractory, and these divided pieces are integrated by a connecting pin. It is structured as follows. In addition, in the above structure, the gas blowing body main body is a) made of porous bricks, b) the joints of a plurality of dense bricks are used as blowing holes, and c) the joints of a plurality of dense bricks are made uneven. d) It is formed by penetrating a dense brick in a straight line. With this configuration, the gas blowing body is integrated with the monolithic refractory installed in the metal case so that it cannot fall off, and the resistance surface with the monolithic refractory can be increased, thereby preventing the gas blowing body from flying out. This can be reliably prevented.

〔Example〕

The present invention will be described in detail below based on embodiments shown in the accompanying drawings.

Note that FIGS. 3a and 3b are sectional front views of one embodiment of the gas blowing body according to the present invention, and FIGS. 4a and 4b and 5 a and 5b are sectional front views of other embodiments.

In Fig. 1, 11 is a metal case;
It is constructed by opening both ends on a bottom plate 13 to which a gas introduction pipe 12 is connected at the center, and connecting the lower end of a tapered cylindrical body part 14. A filled refractory is loaded into the cylindrical body portion 14, and the filled refractory is composed of a plurality of divided pieces including a gas blowing body body 15 and an unshaped refractory 16. With this configuration, the monolithic refractory 16 cannot be ejected from the metal case 11 due to the tapered cylindrical body portion 14, and the gas blowing body 15 is also prevented from ejecting from the metal case 11 due to frictional resistance with the monolithic refractory 16. It is held within a case 11. In this basic configuration, in this embodiment, the gas blowing body main body 15 and the monolithic refractory 16 are
are connected to each other by a connecting pin 17,
Thereby, the gas blowing body body 15 is further firmly integrated with the monolithic refractory 16, and it is possible to prevent the gas blowing body body 15 from jumping out from the metal case 11.

FIGS. 4a and 4b show another embodiment, in which the gas blowing body main body 15 is made up of a plurality of divided pieces, and these divided pieces are interconnected by a connecting pin 17. Due to such interconnection, the gas blowing body main body 15 can increase the frictional resistance with the monolithic refractory 16 compared to the case of a single divided piece. Furthermore, in the case of this embodiment, the connecting pin 17 is connected to the bottom plate 13 of the metal case 11 by a shaft rod 18, and this connection further prevents the gas blowing body 15 from coming out from the metal case 11. It can be prevented.

5a and 5b show a case where the cylindrical body part 14 of the metal case 11 is a cylindrical body, and the filled refractory is entirely constituted by the gas blowing body body 15, and the same protrusion as in the above embodiment is shown. It can have a preventive effect. In addition, 19 is mortar.

Furthermore, in the case of the embodiments shown in FIGS. 4 and 5, the connecting pin 17 has a shaft rod 18, and since the gas blowing body main body 15 is composed of a plurality of divided pieces, each adjacent divided piece is Connecting pin 1 on each contacting surface
7. Opposed recesses are provided to receive the shaft rods 18, and the connecting pins 17 and shaft rods 18 are sandwiched in the recesses and are connected to each other. The shaft rod 18 has its tip protruding from the gas blowing body main body 15. In the case of FIG. 4, the wide mouth side of the truncated conical metal case 11 faces upward, and the connected gas blower main body 15 is inserted into the metal case 11 with the protruding side of the shaft 18 facing upward. and gas blowing body 15
Fill the gap with the monolithic refractory 16, and install the shaft rod 18.
A bottom plate 13 provided with an opening through which the tip is inserted is brought into contact with the wide mouth side, and the metal case 11, the bottom plate 13, and the tip of the shaft rod 18 that appears after passing through the opening are welded and fixed. In the case of Fig. 5, metal case 11
Since it is cylindrical, the gas blowing body 15 is inserted from any side, the gap is filled with mortar 19, and the gas blowing body is then completed in the same manner as in the previous embodiment.

[Effect of idea]

As described above, the gas blowing body according to the present invention can reliably prevent the gas blowing body from flying out using the connecting pin.

[Brief explanation of the drawing]

1a, b and 2 a, b are sectional front views of a conventional gas blowing body, FIGS. 3 a, b are a plan view and a sectional front view of an embodiment of the gas blowing body according to the present invention, FIGS. 4a and 4b and 5a and 5b are a single-sided view and a sectional front view of another embodiment. In the figure, 11; metal case; 12; gas introduction pipe; 13; bottom plate; 14; cylindrical portion; 15; gas blower body;
18; shaft, 19; mortar.

Claims (1)

[Scope of utility model registration request] A filled refractory device consisting of a metal case formed by connecting the lower end of a cylindrical body to a bottom plate having a gas inlet, and a plurality of divided pieces fitted into the metal case and each having at least one gas blowing body. A gas blowing body consisting of a material and a connecting pin that interconnects any combination of divided pieces.