KR100829233B1 - Shut down device of flow road for ventilate hole of a blast furnace - Google Patents

Abstract

The present invention relates to a flow path closing device of a blower for a blast furnace, and more particularly, to a flow path closing device of a blower for a blast furnace having a function of blocking the flow path of the blower pipe for transporting hot and high-pressure hot air produced from a hot air installation to the furnace. .

The flow path closing device of the blast furnace for the blast furnace of the present invention, the sealing means 290 is selectively in close contact with the air duct observation port 124 formed on the opposite side of the blowing pipe 120 to be fitted into the tuyere 110 of the blast furnace 100 (290). And a main rod 260 extending in both sides of the sealing means and formed in a tubular shape having a predetermined length, a sliding rod 230 having a constant length fitted through the sealing means while being fitted to the main rod, and the sliding rod. An expansion member fixing plate 240 vertically fixed to the end of the fastening fixing means 241 and a hinge means 251 rotatably spaced at regular intervals in the circumferential direction of the expansion member fixing plate are installed. 126, a plurality of expansion members 250 to be in close contact with each other, the auxiliary rib fixing member 270 protruded in the circumferential direction to the other end of the main rod vertically fixed, and auxiliary ribs to the auxiliary rib fixing member An auxiliary rib 280 rotatably installed by the hinge means 281 and rotatably hinged by an auxiliary rib hinge means 281 in the middle of the expansion member 250, and an outer side of the sealing means 290. At the same time, one end of the main rod is inserted into the main rod and the other end thereof is supported by a spring support stopper 231 installed at a predetermined position of the sliding rod 230 so that the sliding rod 230 has an elastic force against the furnace. It characterized in that it comprises a ballistic member 235 fitted to the sliding rod 230 to move by.

Furnace, blower, euro, closed

Description

SHUT DOWN DEVICE OF FLOW ROAD FOR VENTILATE HOLE OF A BLAST FURNACE}

1 is a cross-sectional view of a blast furnace showing a state in which a passage closing device of a blower pipe is installed in a blower pipe according to the present invention;

Figure 2 is a longitudinal cross-sectional view showing a state in which the flow path closing device of the blower is installed in the blower in accordance with the present invention,

3 is a schematic view showing a flow path closing device of a blower pipe according to the present invention;

Figure 4 is a perspective view of the main portion showing the flow path closing device of the blower tube according to the present invention,

5 is an explanatory diagram showing a state in which a sealing means constituting the flow path closing device of the blower pipe of the present invention is installed;

6 is a perspective view of a molded heat-resistant closing member constituting the flow path closing device of the blower tube according to the present invention;

7 is a longitudinal sectional view showing another embodiment of the flow path closing device of the blower pipe according to the present invention;

8 is a longitudinal sectional view showing still another embodiment of the flow path closing device of the blower pipe according to the present invention;

9 is a longitudinal sectional view showing a state in which the external force is removed from the handle in the state of FIG. 8;

10 is a side view showing the configuration of a state pinched by the expansion member of the closing device of FIG.

11 is a perspective view showing the configuration of the extended member in the extended state in the state of FIG.

12 is a perspective view illustrating a state in which the expansion member of FIG. 10 is surrounded by a molded heat-resistant closing member;

13 is a cross-sectional view of a conventional furnace,

14 is a longitudinal cross-sectional view showing a blower provided in a conventional furnace.

<Description of the symbols for the main parts of the drawings>

100: furnace 110: windball

120: blower 124: Punggu Observatory

210: moving handle 220: fixed handle

230: sliding rod 235: bullet member

240: expansion member fixing plate 245: heat-resistant closed member

250: expansion member 260: main rod

270: auxiliary rib fixing member 280: auxiliary rib

290: sealing means

The present invention relates to a flow path closing device of a blower for a blast furnace, and more particularly, to a flow path closing device of a blower for a blast furnace that can block the flow path of the blower pipe for transporting the hot and high-pressure hot air produced from the hot air facility to the furnace. will be.

In general, furnace equipment is a facility that produces pig iron, which is the basic material of the industry, and puts ore and coke in the furnace and installs hot air of 1100 ℃ in the circumferential direction of the furnace. When it is supplied through a hole installed in the circumferential direction so that air can be blown, hot iron and coke are used as heat sources to produce molten pig iron.

This production process can be expected to improve productivity and stable operation only if the regular equipment is maintained and normal operation is secured while performing regular replacement and maintenance of abnormal equipment or machinery.

The maintenance of the blast furnace can be divided into the regular repairs and the scheduled repairs that are carried out on a regular basis.In the case of regular or irregular repairs, the production process of the charterers is stopped and the remaining oil charter generated inside the furnace cannot be discharged to the outside. The molten iron that accumulates inside the furnace that has been shut down should be suppressed or minimized.

In addition, as shown in FIG. 13, the molten iron generated in the idle furnace 10 is installed in the internal heat source and the air vent 11 and the air vent 11, and an air blower not connected to the air blower (not shown) is connected to the air blower tube ( 20) is generated by the air flowing through, and the accumulated molten iron may cause large-scale accidents, such as equipment troubles or explosions, and also to reverse the hot air flow to the open blower pipe 20 installed in the tuyere 11 If there is a risk of serious safety disaster to the workers around the facility, it is necessary to actively block the leakage of hot air to the outside and the blockage of air supplied through the vents (11).

Here, the blower tube 20 is composed of a steel bar 21 and a molded refractory body 22 therein, as shown in FIG. 14, and a flange portion 23 so as to be connected to a blower main tube not shown in the upper portion. ) Is formed, and the tuyere observation hole 24 is provided on the side not fitted into the tuyere 11 of the blast furnace 10, and the tuyere observation mouth 24 is selectively inserted at a predetermined angle by a pin (not shown). While the cover 25 is installed to close the cover 25, the cover 25 is provided with a wind hole observation window 25a so that the inside can be checked through the palace palace observation port 24. In addition, the air flow passage 26 is formed on the opposite side of the wind hole observation port 24 to blow air into the furnace 10.

That is, the air flows into the furnace 10 through the blower pipe 20 installed in the dozens of air holes 11 formed in the circumferential direction of the furnace 10 so that the coke inside acts as a heat source and burns. As the amount of molten iron in the furnace increases, the risk factors also increase.

Therefore, as an example of a work method for sealing the tuyere 11, the octopus, which is a kind of refractory, is placed inside the tuyere 11, and then dozens of dodging is sealed with an octopus compaction rod, or an earthenite-shaped molded article is formed inside the tuyere 11. In order to prevent the inflow of air by closing the hot air flow path to put in, such a work method has a problem that it is difficult to completely block the blow air flow path 26, which is a hot air flow path.

In addition, when the air flow passage 26 of the blower pipe 20 installed in the tuyere 11 is blocked with octopus, the octo is a kind of refractory material, which maintains a firmly formed state at a high temperature after closing the flow passage, and has considerable strength. Therefore, there is a problem that the work process is complicated and difficult and adds to the labor intensity, such as the need to separately remove the solid octopus blocking the blow passage 26 with a lever or the like.

The present invention has been made in order to solve the above problems, in addition to the flexible operation of the workforce in the case of blocking the tuyere in order to prevent the molten iron is generated when the furnace is idle, it is possible to flexibly operate the workforce. In order to prevent the use of earthenware or earthenware, the workability is greatly improved, contributing to cost reduction, and an object of the present invention is to provide a flow path closing device of a blower pipe for a furnace that can perform work safely.

It is another object of the present invention to provide a flow path closing device of a blower for a one-touch type furnace for reducing labor intensity.

The flow path closing device of the blower for the blast furnace according to the present invention for achieving the above object is a sealing means that is selectively in close contact with the air port observation side formed on the opposite side of the blower pipe fitted into the blast furnace, the sealing means A main rod formed in a tubular shape having a predetermined length extending to both sides of the main rod, a sliding rod having a fixed length provided with a moving handle for easy operation while being fitted through the sealing means while being fitted to the main rod, An expansion member fixing plate vertically fixed to the end by means of fastening fixing means, a plurality of expansion members installed as hinge means rotatably at regular intervals in the circumferential direction of the expansion member fixing plate to be in close contact with the air flow passage; Auxiliary rib fixed to the other end of the main rod in the circumferential direction and fixed vertically A member, an auxiliary rib rotatably installed on the auxiliary rib fixing member by an auxiliary rib hinge means, and an auxiliary rib pivotally rotatably hinged by an auxiliary rib hinge means on an intermediate portion of the expansion member; And a carburetor member fitted to the sliding rod so that one end is supported by the sealing means and the other end is supported by a spring support stopper installed at a predetermined position of the sliding rod, so that the sliding rod is moved by elastic force to the opposite side of the furnace. It is characterized by.

The flow path closing device of the blower for the blast furnace according to the present invention is characterized in that the molded heat-resistant closing member is further installed so as to easily adhere to the blowing passage while surrounding the expansion member and the expansion member fixing plate.

The flow path closing device of the blower for the blast furnace according to the present invention is characterized in that an expansion stopper means is further provided to restrict the movement of the main rod toward the fixed plate at a predetermined position on the outer circumferential surface of the sliding rod.

The flow path closing device of the blower for the blast furnace according to the present invention is characterized in that the expansion stopper means is composed of a pair of nuts fastened to a male screw formed on the outer circumferential surface of the sliding rod, and a washer disposed between the nuts.

The flow path closing device of the blast furnace for the blast furnace according to the present invention, the sealing means is an outer sealing plate in which the main rod is fixed to both sides in the axial direction, and the annular ring shape is located in close contact with the wind hole observation of the outer sealing plate An elastic outer sealing member, a bolt for fixing the elastic outer sealing member to an outer sealing plate, and a center guide ring which is installed in parallel with the inner circumferential surface of the elastic outer sealing member in an axial direction and guides toward the wind hole observation door. It is characterized by including.

The flow path closing device of the blower for the blast furnace according to the invention, the female thread is formed in the center of the auxiliary rib fixing member, the male thread is formed with a predetermined length from the end so that the sliding rod is fastened to the female screw of the auxiliary rib fixing member. The end of the sliding rod is characterized in that the handle is configured to be easily rotated.

The flow path closing device of the blower for the blast furnace according to the present invention is characterized in that the sealing portion is further provided with a protruding and rolled on the outer peripheral surface of the end portion of the molded heat-resistant closing member.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation of the flow path closing device of the blower for the furnace according to an embodiment of the present invention.

1 is a cross-sectional view of a blast furnace showing a state in which a flow path closing device of a blower pipe is installed in a blower pipe according to the present invention, and FIG. 2 is a longitudinal cross-sectional view showing a state in which a flow path closing device of a blower pipe is installed in a blower pipe according to the present invention, and FIG. Figure 4 is a schematic view showing a flow path closing device of the blower tube according to the present invention, Figure 4 is a perspective view showing the main portion of the flow path closing device of the blower pipe according to the present invention, Figure 5 is a sealing means for constituting the flow path closing device of the blower pipe of the present invention is installed It is explanatory drawing which shows a state, and FIG. 6 is a perspective view of the shaping | molding heat resistant closure member which comprises the flow path closing apparatus of a blower pipe | tube according to this invention.

As shown in FIGS. 1 and 2, the furnace 100 is provided with a plurality of air holes 110 formed to blow high temperature hot air in the circumferential direction of the furnace, and the air flow path 126 is provided in the air holes 110. Blower pipe 120 constituting the connection is connected, this blower pipe 120 is connected to the blowing main pipe (not shown) to be blown.

Here, the blower pipe 120 is composed of a steel shell 121 and a molded refractory 122 inside thereof, and a flange portion 123 is formed to be connected to the blower main pipe at an upper portion thereof, and On the side that is not fitted into the tuyere 110, a tuyere observation port 124 is formed, the tuyere observation hole 124 is provided with a cover as in the prior art to selectively close the tuyere observation port. In addition, the air flow passage 126 is formed on the opposite side of the tuyere observation hole 124 to blow air into the furnace 100.

In addition, the blow passage 126 configured in the blower pipe 120 of the furnace 100, which is a main part of the present invention, prevents leakage of hot air inside the furnace, as well as inflow of external air, and leaks from the blower main pipe to be connected to the upper portion. The air flow passage closing device 200 capable of blocking hot air and flames is introduced into the air duct observation port 124 and installed in the air flow passage 126.

Here, as shown in FIG. 3, the air flow passage closing device 200 may be equipped with a cap-shaped stretchable heat resistant closing member 245 at a tip end thereof, and the stretchable flexible heat resistant closing member 245 may be a blower tube. Close to the surface of the molded refractory 122 of 120 to block the blow passage 126 to prevent the leakage of hot air inside the furnace as well as the inflow of outside air. In addition, the hot air and the flame leaked from the air blower main building toward the windball observation port 124 are blocked by the elastic external sealing agent 292 and the external sealing plate 293.

In more detail, the blow passage closing device 200 corresponding to the gist of the present invention will be described with reference to FIGS. 3 to 6, on the opposite side of the blower pipe 120 fitted into the tuyere 110 of the furnace 100. A sealing means 290 which is tightly fixed to the formed tuyere observation hole 124, a main rod 260 fixed to both sides of the sealing means and formed in a tubular shape having a predetermined length, and a sealing means fitted to the main rod. In the circumferential direction of the sliding rod 230 of a constant length fitted through the through, the expansion member fixing plate 240 fixed to the end of the sliding rod via a fastening fixing means 241, such as a nut, and the expansion member fixing plate A plurality of expansion members 250 installed by hinge means 251 such as bolts and nuts or pins so as to be rotatable at regular intervals, auxiliary rib fixing members 270 fixed perpendicular to the other end of the main rod, and the auxiliary Rib Lock The member is rotatably installed in the secondary rib hinge means 281, such as pins or bolts and nuts, and in the middle of the expansion member 250, and can be rotated in the secondary rib hinge means 281, such as pins or bolts and nuts. Spring-supported stopper (280) hinged so as to be inserted into the inner side of the main rod while being the outside of the sealing means (290) and having one end supported by the sealing means and the other end installed at a predetermined position of the sliding rod (230). 231 which is supported by the 231 and fitted to the sliding rod 230 so that the sliding rod 230 moves by the elastic force to the opposite side of the furnace, and the sliding rod 230 is caused by the elastic force of the elastic member. Spring support stopper 231 provided to move to the opposite side of the furnace, and the hat-shaped molded heat-resistant closing member 245 installed to surround the expansion member 250 and the expansion member fixing plate 240 .

Preferably, the sliding rod 230 is provided with a movement handle 210 at the other end to facilitate the operation, and the other end of the main rod 260 is preferably provided with a fixed handle 220 to facilitate the operation. Do.

In addition, the end of the expansion member 250 is provided with an arc-shaped auxiliary extension piece 250a of a predetermined length, the auxiliary expansion piece 250a to the pin 250b so that the heat-resistant closing member 245 is not separated It is fixed. Of course, the end portions of the auxiliary extension piece 250a and the heat-resistant closing member 245 may be fixed using a C-type clip or may be bonded.

The sealing means 290 is an outer sealing plate 293 in which the main rod 260 is fixed to both sides in the axial direction, and the annular ring-shaped elastic in close contact with the air port observation hole 124 of the outer sealing plate An outer sealing member 292, a bolt 291 for fixing the elastic outer sealing member to an outer sealing plate, and in close contact with the inner circumferential surface of the elastic outer sealing member to be installed in parallel in the axial direction, the wind ball observation hole 124 And a center guide ring 294 adapted to guide toward it.

The bullet member 235 is a compression spring in this embodiment.

Therefore, in order to use the closing device of the present invention, when the fixed handle 220 is pushed and the movable handle 210 is pushed, the elastic member 235 which is a compression spring inserted into the sliding rod 230 is a spring support stopper. The sliding rod 230 is pushed toward the rear side, that is, the furnace 100 while being compressed by the 231, and at this time, each expansion member fixing plate 240 fixed to the sliding rod 230 and the main rod 260. The expansion member 250 and the auxiliary rib 280 hinged to the auxiliary rib fixing member 270 are contracted. At this time, the molded heat-resistant closing member 245 surrounds the expansion member 250, and then removes the cover (not shown) installed in the tuyere observation hole 124 of the blower pipe 120 and pushes the tuyere observation hole 124. When the pressing force is removed from the sliding rod 230 connected to the movable handle 210 at the position of the blow passage 126, the expansion member 250 expands in the radial direction by the elastic force of the elastic member 235. As shown in FIG. 2, the molded heat-resistant closing member 245 completely blocks the blow passage 126.

At this time, the center guide ring 294 guides the sealing means 290 to be in close contact with the blowing passage 126.

Then, in order to operate the furnace again, pressing the sliding handle 230 by pressing the movable handle 210 causes the expansion member 250 to be folded and pulled out through the wind hole observation hole 124 of the blower pipe 120. It becomes possible, and then blocks the funnel observation port 124 with a cover not shown.

On the other hand Figure 7 shows another embodiment of the present invention, the female thread is formed in the center of the auxiliary rib fixing member 270 of one embodiment, the sliding rod 230 is formed a predetermined length male thread (230a) from the end ) Is fastened to the female screw of the auxiliary rib fixing member 270, the end of the sliding rod 230 is configured so that the handle 210 can be easily rotated.

Accordingly, when the handle 210 is rotated in one direction, the elastic member 235, which is a compression spring inserted into the sliding rod 230, is compressed by the spring support stopper 231, so that the sliding rod 230 is rearward. The expansion member 250 hinged to each of the expansion member fixing plate 240 and the auxiliary rib fixing member 270 fixed to the sliding rod 230 and the main rod 260 is transferred to the furnace 100. And the auxiliary ribs 280 are contracted. At this time, the molded heat-resistant closing member 245 surrounds the expansion member 250, and then removes the cover (not shown) installed in the tuyere observation hole 124 of the blower pipe 120 and pushes the tuyere observation hole 124. When the movable handle 210 is rotated in the other direction at the position of the blow passage 126, the expansion member 250 expands in the radial direction, and thus the molding heat-resistant closing member 245 is blown passage ( 126) will be completely blocked.

At this time, by the elastic force of the elastic member 235, the expansion member 250 is maintained in a constant pressure in a state extending in the radial direction.

Meanwhile, FIGS. 8 and 9 are still another embodiment of the present invention, in which the auxiliary rib fixing member 270 of one embodiment may be configured to protrude integrally with the outer circumferential surface of the main rod 260. Of course, it may be formed in a form surrounding the end of the rod 260.

In addition, the expansion member 250 is hinged to the expansion member fixing plate 240 so as to overlap in a thin plate shape, the auxiliary rib fixed to the auxiliary rib fixing member 270 is rotatably fixed to one end by a pin or wire, etc. 280 is the other end of the expansion member 250 is hinged by the hinge means 251, the other end is shown as shown in Figure 8 is configured to expand as shown in FIG.

Accordingly, when the handle 210 is pushed and the expansion member 250 overlaps and depresses as shown in FIGS. 8 and 10, when the external force applied to the handle 210 is removed while being pushed into the blow passage 126, the bullet shot The sliding rod 230 is moved backward by the member 235 to expand the expansion member 250 like an umbrella as shown in FIG. 9, and seal the air flow passage 126 as shown in FIG. 2.

Meanwhile, the expansion stopper means 232 is installed at a predetermined position in a state in which the sliding rod 230 of FIG. 10 has a male screw formed on an outer circumferential surface thereof. The expansion stopper means 232 limits the position where the main rod 260 is moved toward the expansion member 250. Of course, the expansion stopper means 232 may be fixed by welding at a predetermined position of the sliding rod 230, or pins may be inserted and fixed at right angles in the axial direction.

The expansion stopper means 232 is composed of a pair of nuts 232a fastened to a male screw formed on the outer circumferential surface of the sliding rod 230, and a washer 232b positioned between the nuts.

In addition, as shown in FIG. 12, the molded heat-resistant closing member 245 is installed to surround the expansion member 250.

Here, the molded heat resistant closing member 245 may wrap the expansion members 250 by being sewn and sewn with an elastic member 245b at an end thereof, and the end of the molded heat resistant closing member 245 may be extended to the expansion member 250. Can be fixed with a pin as in one embodiment.

In addition, a sealing portion 245a protruded and rolled in an overlapping state is formed on an outer circumferential surface of the end portion of the molded heat-resistant closing member 245 in the form of a hat, and when the expansion member 250 is unfolded, the sealing portion 245a is a blow passage. Make sure that it is in close contact with and securely sealed.

As described above, according to the flow path closing device of the blower for the blast furnace of the present invention, it is a one-touch type, and is a simple mechanism that expands and contracts by applying the spring tension of the elastic member, and can easily open and close the blower flow path by one person operation. It has the effect of ensuring the speed and safety of work.

In addition, according to the flow path closing device of the blower for the blast furnace of the present invention, the diameter of the blowing flow path of the blast furnace is configured differently, but there is an effect that can close the flow path completely regardless of the size of the blowing flow path.

In addition, according to the flow path closing device of the blower for the furnace of the present invention, it is possible to eliminate the work process to remove the closing material after the end of the work or to be damaged by the impact can reduce the work load.

An embodiment of the present invention described above and illustrated in the drawings should not be construed as limiting the technical idea of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications will fall within the protection scope of the present invention, as will be apparent to those skilled in the art.

Claims (7)

delete Sealing means 290 is selectively in close contact with the side of the tuyere observation hole 124 formed on the opposite side of the blower pipe 120 fitted into the tuyere 110 of the blast furnace 100, and extends to both sides of the sealing means A main rod 260 having a length of tubular shape, a sliding rod 230 having a fixed length provided with a moving handle 210 to be inserted into the main rod and penetrate the sealing means and to be easily operated; An expansion member fixing plate 240 vertically fixed to the end of the sliding rod via the fastening fixing means 241 and a hinge means 251 rotatably installed at a predetermined interval in the circumferential direction of the expansion member fixing plate to be blown. A plurality of expansion members 250 to be in close contact with the flow path 126, the auxiliary rib fixing member 270 is projected in the outer circumferential direction to the other end of the main rod vertically fixed to the auxiliary rib fixing member Auxiliary ribs 280 rotatably installed at the middle of the expansion member 250 and rotatably hinged to the auxiliary rib hinge means 281 at the middle portion of the expansion member 250 and the sealing means 290. The outside of the main rod is inserted into the main rod, one end is supported by the sealing means, and the other end is supported by the spring support stopper 231 installed on the sliding rod 230 such that the sliding rod 230 is provided with an elastic force on the opposite side of the furnace. It includes a ballistic member 235 is fitted to the sliding rod 230 to move by, while forming a heat-resistant closed member to facilitate close contact with the air flow passage 126 while surrounding the expansion member 250 and the expansion member fixing plate 240 The passage closing device of the blower for the furnace, characterized in that (245) is installed. The method of claim 2, Expansion stopper means for limiting the movement of the main rod 260 toward the fixed plate 240 on the outer circumferential surface of the sliding rod 230, the flow path closing device of the blower for the furnace, characterized in that further installed. The method of claim 3, wherein The expansion stopper means 232 is a pair of nuts 232a fastened to a male screw formed on an outer circumferential surface of the sliding rod 230, and a washer 232b positioned between the nuts. Euro closure. The method of claim 4, wherein The sealing means 290 is an outer sealing plate 293 in which the main rod 260 is fixed to both sides in the axial direction, and the annular ring-shaped elastic in close contact with the air port observation hole 124 of the outer sealing plate An outer sealing member 292, a bolt 291 for fixing the elastic outer sealing member to an outer sealing plate, and in close contact with the inner circumferential surface of the elastic outer sealing member to be installed in parallel in the axial direction, the wind ball observation hole 124 A flow path closure device of a blower for a blast furnace, characterized in that it comprises a center guide ring (294) to guide toward. The method of claim 2, A female thread is formed at the center of the auxiliary rib fixing member 270, A male screw 230a is formed at a predetermined length from an end portion so that the sliding rod 230 is fastened to the female screw of the auxiliary rib fixing member 270, End of the sliding rod 230, the flow path closing device of the blower for the furnace, characterized in that the handle 210 is configured to be easily rotated. The method of claim 2, An outer circumferential surface of the end portion of the molded heat-resistant closing member 245 is further provided with a sealing portion 245a which protrudes and rolls in an overlapped state.

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