KR101824185B1 - fixing device of tuyere - Google Patents

Abstract

The present invention relates to a tuyere separation device for separating a tuyere from a large tuyere. The tuyere is coupled to the large tuyere installed in a blast furnace so as to inject hot air into the blast furnace from a lower portion of the blast furnace. The tuyere separation device comprises: a housing inserted into a hollow portion of the tuyere; a plurality of jaws installed in the housing and drawn out in the radial direction to grip the inner surface of the tuyere; an actuator installed in the housing to draw and withdraw the jaws in the radial direction to the housing; and a connection bracket installed in the housing and connected by a rod and a hinge shaft for withdrawing.

Description

Fixing device of tuyere}

The present invention relates to a tuyere separating apparatus installed in a furnace of the present invention, and more particularly, to a tuyere separating apparatus capable of separating and discharging a tuyere in which a curved line is generated.

Generally, the role of the tuyere in the blast furnace operation is to blow hot air into the furnace from the lower part of the blast furnace, and copper material is used as the material of the tuyere. Since the tongue is partly protruded in the inside of the blast furnace, the tongue may be suddenly damaged by the impact of molten metal such as molten iron or slag falling, or may be continuously worn and damaged by gas or the like.

 In such a case, the blast furnace operation is stopped. Therefore, in order to keep the blast furnace operation stable, it is necessary to periodically check and manage the tundish or to detect the breakage of the tundish which occurs suddenly during operation and to prevent the blast furnace operation from becoming unstable .

More specifically, the blast furnace process is a process for continuously producing molten iron. In the blast furnace, iron ore and coke are alternately supplied to the upper part of the blast furnace by using a turning chute. ° C of air, and discharging the molten iron through the molten iron discharge port formed at the bottom of the tuyere. The iron ores and coke added in the blast furnace process are lowered to the lower part of the blast furnace, and the hot wind blowing through the tuyeres cross each other as they rise to the upper part of the blast furnace, forming a soft welded joint to melt iron ore and burn coke So that the molten iron is produced. Molten iron, slag, melted coke, and coke continue to come down to the lower portion of the softened welded joint, and hot air of high temperature and high pressure is continuously supplied through the tuyere to form a combustion zone.

As the melts and coke are lowered from the upper part of the blast furnace as described above, there is a risk that the tuyeres are broken due to the impact of the melted material and the coke, or the tuyere is always worn and damaged due to the high temperature and high pressure hot wind. Therefore, the material of the tuyere generally adopts copper having a high thermal conductivity, so that it has durability even in a high temperature atmosphere of 1500 to 2300 ° C. or more, and a passage through which cooling water flows is installed in the tuyere to protect the tuyere. However, the upper portion of the tuyeres is partially damaged by melts and cokes that continuously descend from the upper portion of the blast furnace to the lower portion, or a curved line is generated in which the diaphragm bulb having the ventilation path, that is, There is a problem.

As described above, in the case of tuyeres, since it is worn by the contents in the blast furnace, it is a facility that needs to be replaced for maintenance and repair after a certain period of use. In case of abnormality in the blast furnace, do.

 Korean Patent Publication No. 10-1366536 discloses an apparatus for disassembling a pyrotechnic furnace, and Published Utility Model No. 86304 discloses an apparatus for disposing a pygmy apparatus.

Korean Registered Patent No. 10-1366536 (Feb. Korea Utility Model Registration No. 86304

SUMMARY OF THE INVENTION The present invention provides a tuyere-separating apparatus capable of increasing a coupling force for separating a curled-up tuyere and improving the efficiency of separation work from the tandem-type tuyere.

According to an aspect of the present invention, there is provided a tuyere apparatus for separating a tuyere, which is coupled with a tuyeresu and which inserts hot air into a furnace from a lower portion of a blast furnace, A plurality of jaws which are drawn out in a radial direction to grip the inner circumferential surface of the tuyere; an actuator installed in the housing for radially pulling in and out the jaws to and from the housing; And a connecting bracket connected by a shaft.

In the present invention, the actuator is made of a hydraulic cylinder, and the jaws are connected by a spring that provides an elastic force so that the end portion can be drawn into the housing. The outer circumferential surface of the jaw is formed with projections projecting outwardly in order to increase the coupling force with the inner circumferential surface of the tuyere.

The tuyere separating apparatus according to the present invention uses the coupling with the tuyere in which a curved line which is deviated from the center of the vortex hole is generated, and can reduce the number of workings due to the discharge. In addition, since it can be prevented from being detached from the coupling device in the process of being drawn out, it is possible to improve the safety according to the drawing of the tongue.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic sectional view showing a state in which a tuyere is installed in a blast furnace according to the present invention; Fig.
Fig. 2 is a sectional view showing a state in which a tuyere is installed in a blast furnace,
3 is a perspective view of a tuyere separator according to the present invention,
4 is a cross-sectional view of the tuyere-separating apparatus shown in Fig. 3,
5 is a sectional view showing a state in which a tuyere is separated by a tuyere separator according to the present invention.

The tuyere separating apparatus according to the present invention separates a tuyere for supplying hot air from a large air hole provided on the lower side of a blast furnace. FIGS. 1 and 2 show the state where the tuyere is installed in the blast furnace, and FIGS. 3 and 4 show the tuyere separation device.

Referring to the drawings, a plurality of tuyeres 20 for supplying hot air into the blast furnace 100 along the circumferential direction are provided on the lower side of the blast furnace 100. The tuyere 20 is provided with a hot air supply pipe 13 for supplying hot air from the outside and a hot air circulation pipe 14 for supplying hot air and pulverized coal to the hot air supply pipe 13, A lance nozzle (not shown) is connected. An observation port is formed on the opposite side of the one end side to which the hot air supply pipe and the tuyere 20 are connected, so that the tuyere 20 can be observed. And the photographing unit may be installed in the observation port. As shown in FIG. 2, the tuyeres 20 have a structure in which they are coupled to the ventilator 30 installed in the blast furnace 100. The tuyere 20 coupled to the large air vortex 30 is periodically exchanged because the tuyere 20 receives a shock due to a melt or a coke flowing down from the molten iron ore, causing curvature or abrasion.

3 to 5, a tuyere 20 for pouring hot air into the furnace from the lower portion of the blast furnace, as shown in Figs. 3 to 5, And a housing 51 having a diameter capable of being smoothly inserted into the hollow portion 21 of the housing. Guide holes 54 for guiding the jaws 52 and 53 in and out are formed on the outer circumferential surface of the housing 50.

The jaws (52) and (53) are installed in the guide holes (54) formed in the housing (51) so as to be able to be drawn in and drawn out. A space portion 55 is formed in the housing 51 and an actuator 56 for radially pulling out and drawing the jaws 52 and 53 is installed in the space portion 55. The actuator 56 preferably uses a hydraulic cylinder, but is not limited thereto. In the case of using the hydraulic cylinder, heat insulating means may be provided to prevent the hydraulic oil for driving the hydraulic cylinder from being heated by the high temperature. The main body of the hydraulic cylinder is coupled to the support bracket 60 so that the jaws 52 and 53 can increase the adhesion when the jaws 52 and 53 are engaged with the inner surface of the tuyere 20, And is rotatably supported by a support shaft 61 so as to be rotatable with respect to the housing 51.

Between the jaws 52 and 53, elastic units 57 are provided to provide the elastic force to allow the jaws 52 and 53 to be drawn into the housing 51. Each of the elastic units 57 may be a spring, but is not limited thereto.

The projections 52a and 53a are formed on the outer circumferential surfaces of the jaws 52 and 53 so as to increase frictional force with the inner circumferential surface of the hollow portion of the tuyere 20, As shown in Fig.

A connection bracket 58 is provided at one side of the housing 51 to be pulled out for pulling out. The connection bracket 58 is connected to the rod 200 for drawing. The connection bracket 58 and the end of the rod 200 And is connected by a hinge shaft 201. The connecting bracket 58 and the rod 200 are connected to each other by the hinge shaft 201. The connecting bracket 58 has a pocket portion 202 into which the end of the rod is inserted, It is preferable that the rod 200 or the connection bracket 58 is not rotated by a predetermined angle or more. The hinge shaft 201 may be positioned on the upper side of the pocket portion 202 so that the hinge shaft 201 can be bent downwardly of the connection bracket 58 with respect to the rod 200.

In order to separate and separate the tuyere from the large-sized tuyere using the tuyere-separating apparatus according to the present invention constructed as described above, the hollow portion of the tuyere 20 combined with the large- 21, the housing 51 of the tuyere apparatus is inserted.

In order to separate the tuyere 20 coupled with the vortex 30, in particular the tuyere 20 having the curved line, the rod 200 and the connecting bracket 58 are hinged together. Since the hinge shaft 201 is eccentrically connected to the pocket portion, the connection bracket 58 is connected to the connecting bracket 58 with respect to the longitudinal center of the rod 200 58 are kept at a predetermined inclined angle.

Therefore, in order to pull out the tuyere 20, which is curved downwardly with respect to the large wind tunnel 30, the rod 200 is used to support the connecting bracket 58 53 are inserted into the hollow portion of the tuyeres 20. When the insertion is completed as described above, the hydraulic cylinders as the actuators 56 are operated to rotate the jaws 52, 53 in the radial direction So that the tuyeres 20 are gripped. The supply of hydraulic oil to the hydraulic cylinder, which is the actuator 56, is not shown in the drawings, but may be supplied from the outside.

As described above, the tuyeres 20 are separated from the vents 30 by rotating or retreating the rod 200 in a state where the tuyere 20 is being waved. When the tongue is separated as described above, the actuator 56 is operated to cause the jaws 52 and 53 to be drawn into the space portion 55 of the housing 51, thereby releasing the supporting force with respect to the tongue 20, The housing 51 of the apparatus is separated from the tuyeres 20. In this process, the supporting and extinguishing force of the rod 200 can be provided by a vehicle body having a separate driving part and a pulling part.

The tuyere to be exchanged is also performed as described above.

INDUSTRIAL APPLICABILITY As described above, the air separator according to the present invention can be easily combined with the tongue in which the curved undulation is generated with respect to the center of the vortex hole, and the number of workings due to the discharge can be reduced. In addition, since the tornado can be prevented from being separated during the drawing process, the hand damage of the tornado can be minimized when the tornado for separating and replacing the tornado generated.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

Claims (3)

And is for separating a tuyere which is combined with a ventilation hole installed in the blast furnace and injects hot air into the furnace from a lower portion of the blast furnace,
A plurality of jaws guided in a guide hole formed in the housing and drawn in a radial direction of the housing to grip an inner surface of the tuyere; And a connection bracket installed on the housing and connected to the rod by a hinge shaft for connection to the housing,
Wherein the actuator is formed of a hydraulic cylinder and the hydraulic cylinder is coupled to a support bracket rotatable with respect to the housing so that the jaws can increase the adhesion when the jaws are engaged with the inner surface of the tuyere,
Each of the jaws is connected by a spring that provides an elastic force so that the end portion thereof can be inserted into the housing. On the outer circumferential surface of the jaws, projections that are inclined outwardly are formed to increase the coupling force with the inner surface of the trowel,
Wherein the connection bracket and the rod are coupled to each other by a hinge shaft in a state where the end of the rod is inserted into a pocket portion formed at an end of the connection bracket,
Wherein the hinge shaft is located on the upper side of the pocket portion so that the connection bracket is bent downward with respect to the rod so that the tongue in which the curved slant inclines downward can be taken out. delete delete

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