KR101830482B1 - Supporting apparatus of shroud nozzle - Google Patents

Supporting apparatus of shroud nozzle Download PDF

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Publication number
KR101830482B1
KR101830482B1 KR1020150177822A KR20150177822A KR101830482B1 KR 101830482 B1 KR101830482 B1 KR 101830482B1 KR 1020150177822 A KR1020150177822 A KR 1020150177822A KR 20150177822 A KR20150177822 A KR 20150177822A KR 101830482 B1 KR101830482 B1 KR 101830482B1
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KR
South Korea
Prior art keywords
housing
rod
push rod
shroud nozzle
guide groove
Prior art date
Application number
KR1020150177822A
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Korean (ko)
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KR20170070384A (en
Inventor
김수동
Original Assignee
주식회사 포스코
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Priority to KR1020150177822A priority Critical patent/KR101830482B1/en
Publication of KR20170070384A publication Critical patent/KR20170070384A/en
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Publication of KR101830482B1 publication Critical patent/KR101830482B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/10—Supplying or treating molten metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/10—Supplying or treating molten metal
    • B22D11/103—Distributing the molten metal, e.g. using runners, floats, distributors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • B22D41/56—Means for supporting, manipulating or changing a pouring-nozzle

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Abstract

A shroud nozzle picking apparatus is disclosed. The disclosed shroud nozzle picking apparatus includes a mouse ring rotatably mounted on a base frame to support a shroud nozzle and having an induction rod on an outer surface thereof and a stopper portion connected to the induction rod to restrict rotation of the mouse ring .

Description

{SUPPORTING APPARATUS OF SHROUD NOZZLE}

The present invention relates to a shroud nozzle picking apparatus, and more particularly, to a shroud nozzle picking apparatus capable of minimizing a deflection of a shroud nozzle when a shroud nozzle is detached and coupled and preventing breakage of a flexible hose connected to a cooling line of a mouse ring, To prevent shrinkage and cutting of the molten steel, and at the same time to prevent air entrainment, thereby improving the cleanliness of the molten steel.

FIG. 1 is a view showing a conventional continuous casting facility, and FIG. 2 is a view showing a state of coupling between a ladle nozzle and a shroud nozzle of a ladle of a continuous casting plant according to the prior art.

1 and 2, the molten steel contained in the ladle 10 through the refining process is injected into the tundish 13 through the shroud nozzle 12 connected to the lower nozzle 11 of the ladle 10 , The tundish 13 receives the molten steel until a predetermined amount is filled. In turn, the alumina and nonmetallic inclusions contained in the molten steel float up and separate, so that pure molten steel from which impurities have been removed is supplied to the immersion nozzle 14 at the lower end of the tundish 13.

When a predetermined amount of molten steel is filled in the tundish 13, a stop cylinder (not shown) is operated to raise the stopper (not shown), which hermetically closes the upper injection port of the immersion nozzle 14, Molten steel is injected into the mold 15. The molten steel injected into the mold 15 undergoes a cooling process to form a solidifying cell, which is cooled to a predetermined shape and drawn into a solid casting (not shown).

When the molten steel contained in the ladle 10 is injected into the tundish 13 and the ladle 10 is emptied, the emptied ladle 10 is exchanged with another ladle waiting for the molten steel to be filled. At this time, the exchanged ladle ladle nozzle is connected to the shroud nozzle 12 coupled to the mouth ring 16, and molten steel in the exchanged ladle is supplied to the tundish 13, so that the continuous casting operation is performed.

The shroud nozzle 12 is seated and engaged with the latching jaw of the mouse ring 16 assembled to the fork arm 18 connected to the shroud mann plate 17 so that the tundish 13 can be inserted into the ladle 10 without re- Lt; RTI ID = 0.0 > of < / RTI >

When the shroud mann plate 17 is lifted and lowered, the mouse ring 16 for coupling the shroud nozzle 12 to the fork arm 18 rotates and maintains the horizontal state, and the shroud nozzle 12 are maintained in a vertical state. Therefore, when molten steel contained in the ladle 10 is injected into the tundish 13, the molten steel can be injected without being exposed to the atmosphere.

When the shroud nozzle 12 rotates due to the slag flow floated and separated in the tundish 13 at the time of separating the shroud nozzle 12 from the lower nozzle 11 and the molten steel flow due to the lowering of the bath surface of the tundish 13, The shroud nozzle 12 collides with the lower base portion of the fork arm 18 to generate microcracks in the neck portion of the shroud nozzle 12 and the microscopic cracks progress due to vibration and impact generated during molten steel injection, There is a problem that an accident occurs.

The flexible hose 19 connected to the cooling line of the mouth ring 16 rotates with the upper base of the fork arm 18 while the mouse ring 16 coupled with the shroud nozzle 12 rotates together with the shroud nozzle 12. [ The mouse ring 16 is thermally deformed by the high-temperature radiation heat of the molten steel and deformed by the deformation of the mouse ring 16 The vertical angle of the shroud nozzle 12 that is seated on the mouse ring 16 is changed so that a space is created between the lower nozzle 11 of the ladle 10 and the shroud nozzle 12, Air is mixed to oxidize and contaminate the molten steel, and the production of alumina and inclusions is accelerated, resulting in poor cleanliness of the molten steel. The shroud nozzle 12 is now formed and fused in a spaced space between the lower nozzle 11 and the shroud nozzle 12 so that the separation is smooth when the shroud nozzle 12 is separated from the lower nozzle 11 of the ladle 10 There was no problem.

Japanese Patent Application Laid-Open No. 10-2014-0081009

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to minimize the deflection of the shroud nozzles when the shroud nozzle is separated and coupled, And it is an object of the present invention to provide a shroud nozzle picking apparatus which can prevent cracks and cuts and prevent air entrainment and improve the cleanliness of molten steel.

A shroud nozzle picking apparatus according to one aspect of the present invention includes a mouse ring rotatably mounted on a base frame to support a shroud nozzle and having an induction rod on an outer surface thereof, As shown in FIG.

The stopper portion is provided between the push rod and the fixing plate provided on the upper surface of the housing while being inserted into the push rod. The push rod is inserted into the housing, A first return spring for elastically supporting the push rod to the guide rod side and a second return spring provided on the housing for elastically supporting the guide rod when the guide rod moves downward.

The push rod is inserted into an opening of the guide groove opened to the upper surface of the housing and is assembled to be slid by a hole formed in the fixing plate, The first return spring may be installed between the head portion protruding from the end of the push rod and the fixing plate, and the second return spring may be installed at the bottom of the guide groove.

The guiding groove has a shape corresponding to a moving radius of the guiding rod and is cut into one side of the housing facing the mouse ring. The guiding groove has an end inserted into the guiding groove, Lt; RTI ID = 0.0 > width. ≪ / RTI >

The shroud nozzle picking-up device includes a cooling line installed at one side of the housing and connected to the flexible hose to receive the cooling gas through the flexible hose, and a cooling gas passing through the housing and connected between the cooling line and the guide groove. Lt; RTI ID = 0.0 > a < / RTI >

According to the present invention, when the shroud nozzle that is seated on the mouse ring is separated from and coupled to the ladle dropping nozzle, the deflection of the shroud nozzle can be minimized and the verticality can be corrected, It is possible to prevent cracking and cutting accidents of the shroud nozzle.

In addition, since the deflection of the shroud nozzle can be minimized and the verticality can be corrected, it is possible to prevent the molten steel from being reoxidized by air mixing, thereby improving the cleanliness of the molten steel.

In addition, since the change of the mouse ring can be minimized, it is possible to prevent the flexible hose connected to the cooling line of the mouse ring from colliding with the peripheral equipment and accordingly to prevent the breakage of the flexible hose, Can be prevented.

In addition, since the mouse ring is prevented from being deformed, the verticality of the shroud nozzle that is seated in the mouse ring can be improved, thereby avoiding a space between the shroud nozzle and the ladle nozzle. It is possible to prevent generation and fusing at present due to generation of the spacing space. Therefore, when the shroud nozzle is separated from the ladle dropping nozzle, it can be easily separated without troublesome work of removing the fused present.

1 is a view schematically showing a general continuous casting facility.
2 is a view showing a state of coupling between a ladle and a shroud nozzle of a continuous casting facility according to the prior art.
3 is a perspective view illustrating a shroud nozzle picking apparatus according to the present invention.
4 is an exploded perspective view of FIG.
5 is a view illustrating a state of coupling between the shroud nozzle picking-up apparatus and the shroud nozzle according to the present invention.

In order to facilitate understanding of the features of the present invention as described above, the shrouded nozzle picker according to the embodiment of the present invention will be described in more detail.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. And that the present invention can be implemented as described above. Therefore, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

FIG. 3 is an exploded perspective view of the shroud nozzle picking apparatus according to the embodiment of the present invention, FIG. 4 is an exploded perspective view of FIG. 3, FIG. 5 is a cross-sectional view of the shroud nozzle picking- Fig.

3 to 5, the shroud picking-up apparatus 100 according to an embodiment of the present invention includes a shroud receiving apparatus 100 which is rotatably assembled to a base frame 110 to support a shroud nozzle 200, A mouse ring 120 having an induction rod 126 and a stopper 130 connected to the induction rod 126 to limit the rotation of the mouse ring 120.

Specifically, the base frame 110 is formed in a 'C' shape, and a fork arm 300 connected to a shroud mann plate (not shown) is assembled to a central portion of the base frame 110, And a fastener 111 for assembling the mouse ring 120 is formed on the protruding portion.

The heat sink 140 is assembled to the lower end of the base frame 110 by bolting or welding. The heat dissipation plate 140 has a plate shape and has a U-shaped groove portion 141 at one end thereof into which the shroud nozzle 200 is inserted. In addition, the heat sink 140 has a plurality of cooling gas ejection openings 142 formed in a predetermined pattern on the upper surface thereof. The cooling gas ejection openings 142 are connected to a cooling gas supply pipe 400 installed on one side of the heat sink 140 through a cooling gas passage 143 (see FIG. 5) formed in the heat sink 140, The cooling gas is ejected to the cooling gas ejection openings 142 via the cooling gas passage 143. [

The mouse ring 120 is rotatably assembled to the fastening hole 111 of the base frame 110 by the fastening member 150.

The mouse ring 120 is formed in a ring shape for gripping a neck portion of the shroud nozzle 200. A ring 160 is coupled to one end of the mouse ring 120 so as to be rotatable by a hinge, 120 are formed with grooves into which the rings 160 are inserted. The ring 160 is inserted into a groove formed at the other end of the mouse ring 120 and is fixed by the bolts B and the nuts N and forms a circle together with the mouse ring 120.

A pair of threaded holders 121 are provided on the front face of the ring connection part of the mouse ring 120 so as to face each other and the holder 121 of the mouse ring 120 The mouse ring 120 is rotatably assembled to the base frame 110. As shown in FIG.

The inner surface of the mouse ring 120 is provided with an engagement protrusion 122 on which a neck portion of the shroud nozzle 200 is seated along an inner periphery of the mouth ring 120. A plurality of cooling gas ejection openings 123 ) Are processed at regular intervals. The cooling gas discharge ports 123 are associated with the flexible hose 500 connected to the cooling line 125 processed on one side of the mouse ring 120 through the cooling gas passage 124 formed inside the mouse ring 120, The cooling gas is ejected to the cooling gas ejection openings 123 via the cooling gas passage 124 when the cooling gas is supplied through the flexible hose 500. [

An induction rod 126 protrudes from the outer surface of the mouse ring 120. The guide rod 126 is configured to have a downward streamlined structure and a spherical head 126A having a larger size than the other portion at its end. Although the induction rod 126 has a downward streamlined structure in the present embodiment, the present invention is not limited thereto, and the induction rod 126 may have an upward streamlined structure.

The stopper portion 130 includes a housing 131, a push rod 132, and first and second return springs 133 and 134.

The housing 131 is installed inside the center of the 'C' shaped base frame 110. A guide groove 131A is formed in the housing 131 along the moving radius of the guide rod 126 rotating together with the mouse ring 120 when the mouse ring 120 rotates. The inner diameter of the guide groove 131A is formed to be larger than the head 126A of the guide rod 126 so that the head 126A of the guide rod 126 can be inserted, So that the guide rod 126 can be rotated in a state of being inserted into the guide groove 131A. The width of the cutout portion of the guide groove 131A is smaller than the diameter of the head 126A of the guide rod 126 so that the guide rod 126 is not separated from the guide groove 131A.

A push rod 132 is inserted into the opening of the guide groove 131A exposed at the upper surface of the housing 131 so as to be slid by a hole formed in a fixing plate 170 assembled to the upper surface of the housing 131. One end of the push rod 132 inserted into the guide groove 131A is formed of a head 132A having a larger size than the other portion so that the push rod 132 is not separated from the hole of the fixed plate 170, The release-preventing member 180 is assembled to the other end of the push rod 132 located outside of the support member 131A.

The first return spring 133 is inserted into the push rod 132 and is disposed between the head 132A of the push rod 132 and the fixed plate 170 to elastically support the push rod 132 toward the guide rod 126 And the push rod 132 is configured to push the lead rod 126 downward. The second return spring 134 is provided on the bottom of the guide groove 131A to elastically support the guide rod 126 when the guide rod 126 moves downward.

A cooling gas passage 131B connected to the guide groove 131A is provided in the housing 131. The cooling gas passage 131B is connected to the cooling line 190 processed at one side of the housing 131 The cooling gas is supplied to the guide groove 131A via the cooling gas passage 131B when the cooling gas is supplied through the flexible hose 600 in conjunction with the flexible hose 600 connected thereto. Therefore, since the cooling air is supplied to the guide groove 131A and the guide rod 126 inserted into the guide groove 131A is cooled, the guide rod 126 is not thermally expanded, 120, respectively.

Hereinafter, the operation of the shroud nozzle picking-up apparatus 100 according to the present invention in the continuous casting process will be described.

When the shroud nozzle 200 is seated on the mouse ring 120 of the shroud nozzle picking apparatus 100 according to the present invention by the continuous casting preparation operation and then the shroud mann plate (not shown) And the shroud nozzles 200 maintain the horizontal and vertical states, respectively.

In order to prevent the risk of cracking and cutting during the casting operation, the shroud nozzle 200 is preheated to a predetermined temperature or higher by being built in a preheating oven (not shown) in the above state, When the injection into the turn-off (not shown) is completed, the shroud nozzles 20 are separated from the shroud nozzles 200 connected to the ladle dropping nozzles (not shown) by operating the shroud manifolds, Check the injection port contamination state, crack, and cutting state of the nozzle 200.

At this time, when the shroud nozzle 200 is separated from the ladle's lowering nozzle, the shroud nozzle 200 immersed in the bath surface of the tundish at a certain depth does not flow or flows backward and forward due to the flow of the slag.

When the shroud nozzle 200 does not flow, the mouse ring 120 and the shroud nozzle 200 maintain the horizontal and vertical states, respectively, so that the guide rods 126 Is located at the center portion of the guide groove 131A and does not receive the resistance of the first and second return springs 133 and 134. [ The induction rod 126 is cooled by the cooling gas supplied to the guide groove 131A through the cooling gas passage 131B of the housing 131 so that the induction rod 126 is not thermally expanded by the radiant heat of the molten steel The heat radiating plate 140 on the lower surface of the base frame 110 is not heated by the radiant heat of the molten steel, so that deformation and corrosion do not occur.

When the shroud nozzle 200 rotates forward, the guide rod 126 of the mouse ring 120 is moved upward along the guide groove 131A of the housing 131 to collide with the push rod 132, The rod 126 is stopped by the push rod 132 which receives the expansion force of the first return spring 133 so that the mouse ring 120 and the shroud nozzle 200 no longer rotate forward. The push rod 132 pushes the guide rod 126 of the mouse ring 120 downward by the self weight of the shroud nozzle 200 and the expansion force of the first return spring 133, The ring 120 and the shroud nozzle 200 are returned to the horizontal and vertical states, respectively.

When the shroud nozzle 200 rotates backward, the guide rod 126 of the mouse ring 120 moves downward along the guide groove 131A of the housing 131 and collides with the second return spring 134 It stops. At this time, the second return spring 134 absorbs the impact caused by the collision with the guide rod 126, thereby relieving the impact applied to the guide rod 126. When the second return spring 134 pushes up the guide rod 126 by the self weight of the shroud nozzle 200 and the inflation force of the second return spring 134, the mouse ring 120 and / Each of the shroud nozzles 200 returns to the horizontal and vertical states.

According to the present invention described above, when the shroud nozzle seated on the mouse ring is separated from and coupled to the ladle dropping nozzle, it is possible to minimize the deflection of the shroud nozzle and correct the misaligned vertical degree, Thereby preventing cracks and cutting accidents of the shroud nozzles.

In addition, since the deflection of the shroud nozzle can be minimized and the verticality can be corrected, it is possible to prevent the molten steel from being reoxidized by air mixing, thereby improving the cleanliness of the molten steel.

In addition, since the change of the mouse ring can be minimized, it is possible to prevent the flexible hose connected to the cooling line of the mouse ring from colliding with the peripheral equipment and accordingly to prevent the breakage of the flexible hose, Can be prevented.

In addition, since the mouse ring is prevented from being deformed, the verticality of the shroud nozzle that is seated in the mouse ring can be improved, thereby avoiding a space between the shroud nozzle and the ladle nozzle. It is possible to prevent generation and fusing at present due to generation of the spacing space. Therefore, when the shroud nozzle is separated from the ladle dropping nozzle, it can be easily separated without troublesome work of removing the fused present.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood that the invention can be variously modified and changed without departing from the technical scope thereof.

100: shroud picking device
200: shroud nozzle
110: base frame
120: Mouse ring
130: stopper portion
131: Housing
132: push rod
133, 134: first and second return springs

Claims (5)

delete A mouse ring rotatably mounted on the base frame to support the shroud nozzle and having an induction rod on an outer surface thereof; and a stopper portion connected to the induction rod to restrict rotation of the mouse ring,
The stopper portion
A housing into which the guide rod is inserted;
A push rod inserted into the housing to limit a movement upper limit of the guide rod;
A first return spring installed between the push rod and a fixed plate provided on an upper surface of the housing to insert the push rod into the push rod and elastically support the push rod to the guide rod side;
And a second return spring provided on the housing to elastically support the guide rod when the guide rod moves downward.
[3] The apparatus of claim 2, wherein the guide groove formed in the housing is open to the upper surface thereof,
Wherein the push rod is assembled to be slid by a hole formed in the fixing plate while being inserted into an opening of the guide groove opened to the upper surface of the housing,
Wherein the first return spring is provided between a head portion protruding from an end of the push rod and the fixing plate,
And the second return spring is installed at the bottom of the guide groove.
[5] The apparatus according to claim 3, wherein the guide groove has a shape corresponding to a moving radius of the guide rod and is cut into one side of the housing facing the mouse ring, And a head having a size larger than a width of the cut-out portion of the guide groove.
The refrigeration system of claim 3, further comprising: a cooling line installed at one side of the housing and connected to the flexible hose to receive the cooling gas through the flexible hose;
And a cooling gas passage penetrating the housing and connected between the cooling line and the guide groove. ≪ Desc / Clms Page number 19 >

KR1020150177822A 2015-12-14 2015-12-14 Supporting apparatus of shroud nozzle KR101830482B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150177822A KR101830482B1 (en) 2015-12-14 2015-12-14 Supporting apparatus of shroud nozzle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150177822A KR101830482B1 (en) 2015-12-14 2015-12-14 Supporting apparatus of shroud nozzle

Publications (2)

Publication Number Publication Date
KR20170070384A KR20170070384A (en) 2017-06-22
KR101830482B1 true KR101830482B1 (en) 2018-02-20

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Publication number Priority date Publication date Assignee Title
KR102156715B1 (en) * 2018-09-28 2020-09-16 주식회사 포스코 Coupling apparatus for nozzle and processing method for molten material using the same

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