KR100399821B1 - Device for fixing the oxygen blowing pipe in the blast furnace - Google Patents

Abstract

The present invention relates to an oxygen pipe holding member which is interposed between an oxygen pipe and a flexible hose to stably fix the oxygen pipe and the flexible hose. The furnace uses oxygen guided through a flexible hose from an oxygen storage tank. The oxygen pipe fixing member for fixing the oxygen pipe to the flexible hose to open the outlet of the jig is composed of a jig with a screw formed on the outer peripheral surface and a tightening cap portion formed on the inner peripheral surface of the screw engaging the screw of the jig. A hose connection part having a pipe fixing part, a hollow part capable of communicating with oxygen, and the flexible hose connected thereto, and a valve for adjusting oxygen flow rate are mounted to allow oxygen flow between the pipe fixing part and the hose connection part. And safety device with built-in check valve to prevent oxygen backflow Because it is made, it is easy to fix the pipe and bite, does not become oxygen leak in the joint, and even when backfire, the leak is blocked by the safety device assembled on the rear surface, so that no explosion or breakage of the rubber flexible connection occurs. Can be prevented.

Description

Device for fixing the oxygen blowing pipe in the blast furnace}

The present invention relates to a fixing member for fixing a flexible hose to the oxygen pipe (PIPE) used in the furnace opening of the furnace, in particular interposed between the oxygen pipe and the flexible hose to stabilize the oxygen pipe and flexible hose. It relates to an oxygen pipe fixing member that can be fixed by.

In general, in order to discharge the melt produced in the furnace to the outside, the opening of the outlet opening becomes impossible when the iron rod is cut and dissolved while using the opening machine for opening the outlet opening. At this time, the oxygen opening is performed using an oxygen pipe at the time of the penetration through the crack of the exit opening, during the melting operation due to the solidification of the SKIMMER, and at the opening of the remnant hole.

In the opening operation of oxygen, as shown in FIG. 1, a leak (LEAK) phenomenon occurs at the connection between the pipe 1 and the flexible hose 2, or the oxygen backflow phenomenon due to separation and separation thereof is caused. It is required to prevent the flexible hose from rupturing and damaging.

In general, the furnace has four outlets (out-of-melt outlets) for discharging the waste water and slag accumulated in the furnace to the outside in the circumferential direction. The exit port is sealed with mud (MUD) material, which is an indefinite refractory material, and the exit port must be open in order to discharge the internal molten iron as an external large hot water. At this time, the exit port is opened by using an oxygen pipe as a method of opening the exit port. Carry out oxygen opening work to open the hole.

That is, according to the conventional embodiment, in order to perform the oxygen opening work, as shown in FIG. 1, the operator inserts the end of the oxygen pipe 1 into the flexible hose 2 by about 30 to 40 cm and then inserts it. The end of the oxygen pipe 1 is bent at about 45 to 60 degrees a plurality of times.

At this time, the oxygen leaks on the joint surface between the flexible hose 2 and the oxygen pipe 1 so that the small explosion and the connection hose rupture and break due to the backfire phenomenon, and the rubber hose and the oxygen pipe connected after the work is completed. Remove the pipe that was bent at the time of removal.

As such, the method of mounting and removing the oxygen pipe 1 and the flexible hose 2 is inefficient because it is performed by a worker.

The present invention has been made to solve the above-mentioned problems, and can prevent the leakage of oxygen pipe and the flexible hose at the time of oxygen opening work, as well as fix and bite the oxygen pipe. It is an object of the present invention to provide an oxygen pipe fixing member that can prevent workmen from being injured by industrial accidents due to backfire phenomenon caused by oxygen leakage by improving the work.

According to the present invention, in order to achieve the above object, the oxygen pipe fixing member for fixing the oxygen pipe to the flexible hose in order to open the outlet of the furnace using oxygen guided through the flexible hose from the oxygen storage tank Is a pipe fixing part consisting of a jig having a screw formed on the outer circumferential surface and a tightening cap part formed on an inner circumferential surface of the screw engaged with the screw of the jig, and a hose connecting part having a hollow part capable of communicating with oxygen and connected to the flexible hose. In addition, the pipe is connected between the fixing portion and the hose connecting portion is configured to enable the oxygen flow, and a valve for regulating the oxygen flow rate is built in, characterized in that consisting of a safety device unit is built in a check valve for preventing oxygen backflow.

1 is a view illustrating a state in which an oxygen supply pipe and a hose are connected according to a conventional embodiment.

Figure 2 is a perspective view of the fixing part of the fixing member according to an embodiment of the present invention.

Figure 3 is a cross-sectional view of the safety device of the fixing member according to an embodiment of the present invention.

4 is a view schematically showing an oxygen pipe holding member according to an embodiment of the present invention.

<Description of Symbols for Major Parts of Drawings>

1: oxygen pipe

2: flexible hose

3: bite fixing jig

4 tightening cap

5a: Flow preventing spring

5b: built-in spring

5c: check valve spring

6a: safety device

6b: Nouring part

7a: Cylindrical Flow Packing

8a: manual valve

8b: Flow control valve

9: snap ring

10: check valve

11: quick coupling

12: ball

Hereinafter, with reference to the accompanying drawings, an embodiment of the present invention will be described as follows, the same configuration adopts the same reference numerals.

In the technical configuration to achieve the above object, the present invention is a device for fixing the oxygen pipe (1) in the oxygen opening of the furnace is hollow so that the oxygen pipe (1) can be inserted into the center of the outside The three elastic jogs (engagement fixing parts) and the circular tightening cap part 4 which tightens the jog 3 are fixed.

In addition, a taper (7a-1) cylindrical fluid packing (7a) that can be inserted and adhered to the end of the oxygen pipe (1) end is embedded, and the built-in spring (SPRING) (5b) on the back of the oxygen pipe (1) and cylindrical fluid The packing 7a is brought into close contact. In addition, a packing 7b for preventing a leak is attached to the side of the bite fixing part 3 and a jog ring 6b is attached to the tightening cap part 4 and the safety device part 6a outside diameter. It can work easily without slipping.

In addition, a check valve (10) and a flow control valve (8b) are built into the safety device unit (6) for automatically shut off oxygen introduced at the back of the back surface, and the check valve has a spring (5c). A ball 12 supported by an elastic body such as is assembled.

First, as shown in FIG. 4, according to the embodiment of the present invention, the oxygen pipe bite fixing part 3 and the tightening cap part 4 and the oxygen backlash prevention and connecting flexible hose 2 are provided. Inside, the ball is assembled and combined with the check valve 10 and the flow control valve 8b.

2 and 3, the bite fixing portion 3 and the tightening cap portion 4 is hollow so that the oxygen pipe 1 can be inserted, and the pipe is separated when the oxygen pipe is inserted and fixed to the side thereof. If the bone is formed like a screw so that the tightening cap 4 is rotated in one direction, for example, to the right, the tightening cap 4 is advanced by the screw thread and the taper (30 degrees) of the rear surface of the bite fixing part 3 is prevented. The pipe 1 can be bitten and fixed by the external thread of the bite fixing part 3 by applying a force to the jog by applying pressure to the part.

The springs on the rear surface of the tightening cap (4) are assembled in a flow-proof type before and after, and have a cylindrical cylindrical packing (7a) with a taper (7a-1) that can be held in close contact with the oxygen pipe (1). ) Is pushed and the attachable packing 7b is attached to the end surface of the bite fixing part 3 to prevent the leak.

Oxygen flows backward and the safety device 6 has a built-in check valve (10) for preventing backflow and a disaster caused by a small explosion and a seat (10) on the check valve (10). (13) may be attached in a circular shape and require airtightness.

At the rear end of the flow control valve 8b, a quick coupling 11 is attached to the flexible hose 2 so that attachment and detachment of the flexible hose 2 are easy.

Referring to Figure 5, as an assembly method for mounting and fixing the oxygen pipe fixing member according to an embodiment of the present invention, the oxygen pipe 1 is first inserted and pushed up to the contact portion of the internally inserted floating cylindrical packing 7a on the rear surface. .

As shown in FIG. 2, when the cap 4 is rotated, the oxygen pipe is fixed while being tightened by tightening three jogs that are opened while the cap is advanced, thereby preventing oxygen leak. The safety device 6 is assembled with a check valve 10 and a flow rate control valve 8b which are automatically shut off when oxygen is backfired.

In summary, the oxygen pipe can be inserted into the central part of the oxygen bittering fixing and safety device used in the oxygen opening work in the apparatus for opening the exit port of the furnace, and the rear surface safety device 6 is provided. Oxygen is introduced through the unit is discharged into the oxygen pipe fixed to the fixed part (3) to the front end.

It is fixed by three elastic jog reel fixing parts 3 and a circular tightening cap 4 on the outside of the hollow, and a leak prevention packing 7b is attached to the side of the jog and the joint. There is a taper (7a-1), and includes a cylindrical flow packing (7a) embedded in the bleed fastening (3).

Hereinafter, the effects of the present invention configured as described above are as follows.

When the oxygen pipe and the rubber flexible hose are connected by the conventional method and the oxygen pipe is inserted into the rubber hose (45 to 60 degrees) and bent, the rubber flexible break-up and rupture may be caused by the oxygen leak (LECK) and the small explosion. Oxygen pipes are not reused and disposed of.

Therefore, according to the oxygen pipe bite safety device of the present invention, it is easy to fix the pipe and bite, does not become the oxygen leak (LECK) in the joint portion, even when backfire is not leaked (LECK) by the safety device assembled on the rear surface. It does not cause explosion and detachment of rubber flexible connection part to prevent safety disaster and oxygen pipe and connecting rubber flexible when removing and installing it.

The foregoing is merely illustrative of preferred embodiments of the present invention and those skilled in the art to which the present invention pertains may make modifications and changes to the present invention without departing from the spirit and spirit of the invention as set forth in the appended claims. It should be recognized.

Claims (4)

In the oxygen pipe holding member for fixing the oxygen pipe to the flexible hose in order to open the outlet of the furnace using the oxygen guided through the flexible hose from the oxygen storage tank, A pipe fixing part including a jig having a screw formed on an outer circumferential surface thereof, and a tightening cap part formed on an inner circumferential surface of a screw engaged with the screw of the jig; Hose connecting portion having a hollow portion capable of oxygen communication and the flexible hose is connected, Oxygen pipes are installed between the pipe fixing part and the hose connection part so as to enable oxygen flow, and a valve for regulating oxygen flow rate and a safety device part having a check valve for preventing oxygen backflow. Fixing member. The oxygen pipe fixing member according to claim 1, wherein an elastic body for elastically supporting the inserting cap portion is mounted between the pipe fixing portion and the safety device portion. The oxygen pipe fixing member according to claim 1, wherein the hose connecting portion and the safety device portion are connected by a quick coupling. The oxygen pipe fixing member according to claim 1, wherein the check valve is provided with a ball elastically supported by an elastic body.