KR20150116005A - Vacuum apparatus for vacuum hopper facility - Google Patents

Abstract

According to an embodiment of the present invention, a vacuum hopper device for a vacuum degassing facility comprises: a connecting pipe member connected to a vacuum degassing facility to degas molten steel in an electric arc furnace by refluxing the molten steel; a hopper body connected to an upper end part of the connecting pipe member, storing supplies to be provided to the vacuum degassing facility; a sealing member provided between the hopper body and the connecting pipe member for sealing; and a cooling jacket part provided near the sealing member, cooling the sealing member by circulating and supplying cooling water.

Description

[0001] The present invention relates to a vacuum hopper for a vacuum degassing apparatus,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum hopper device for a vacuum degassing apparatus, and more particularly, to an invention capable of improving the service life of a sealing member provided for sealing between a hopper body and a connecting pipe member.

Generally, the molten iron discharged from the molten steel furnace is subjected to a primary refining treatment in the steelmaking process and then to a secondary refining treatment in a vacuum degassing facility.

That is, after the first refining, the molten steel contains a large amount of gas components such as oxygen, nitrogen, and hydrogen, thereby generating defects due to impurities. Therefore, there are limitations in producing various products for special purposes and satisfying the quality requirement level of the consumer, The secondary refining process for refining the molten steel in the ladle by refluxing in a vacuum to elevate the temperature, decarburize, deoxidize, and dehydrogenate the ladle using a vacuum degassing facility (RH facility).

In other words, the vacuum degassing facility removes the impurities contained in the molten steel, corrects the temperature of the molten steel, and reflux the molten steel in order to make the components and the temperature of the molten steel uniform.

A typical vacuum degassing apparatus includes a vacuum tank capable of evacuating a vacuum, a pair of submerged tubes connected to a lower portion of the vacuum tank and immersed in molten steel injected into the ladle, and a vacuum tank connected to one side of the vacuum tank to reduce the pressure of the vacuum tank And a vacuum device.

Here, the pair of deposition pipes are divided into a riser pipe in which the molten steel injected into the ladle is raised to the vacuum tank so that molten steel can be refluxed, and a downfalling pipe in which molten steel raised in the vacuum tank is lowered into ladle due to the iron static pressure.

In this vacuum degassing facility, when a pair of submerged pipes are immersed in molten steel injected into the ladle, when the reflux gas is injected into the riser pipe, bubbles are generated in the molten steel and the molten steel gradually rises in the rising pipe, The molten steel raised in the uprising pipe is circulated through the vacuum tank and the downfalling pipe and reflux of the molten steel is generated.

In addition, in the vacuum degassing facility, it is possible to remove impurities such as sulfur, gas and the like by feeding a feed such as ferro-alloy into the vacuum chamber. In the vacuum degassing facility, It is necessary to provide a sealing member for vacuum sealing between a hopper body into which the above-mentioned ferroalloy or the like is put and a connecting pipe member connected to the vacuum tank.

However, there is a problem that such a sealing member is prematurely damaged due to radiant heat flowing from the connecting pipe member, and the sealing environment is destroyed. The sealing member is conventionally provided in the shape of a rope, Therefore, there was a problem that replacement was cumbersome.

Further, in order to replace the sealing member, the hopper body has been completely separated and worked, and thereafter, a manhole portion in which the operator can enter the hopper body is provided. However, the manhole portion is provided at an inclined lower end portion of the hopper body, and there is a problem that the alloy iron or the like remains in the manhole portion protruding.

The upper end of the hopper body coupled with the upper and lower driving cylinders is deformed by the driving force of the upper and lower driving cylinders provided for opening and closing the discharge hole at the lower end of the hopper body or the upper and lower driving cylinders are twisted.

Therefore, there is a need for research on a vacuum hopper device for vacuum degassing facilities to solve the above-mentioned problems.

SUMMARY OF THE INVENTION An object of the present invention is to provide a vacuum hopper for vacuum degassing apparatus capable of improving the lifetime of a sealing member provided between a hopper body and a connection pipe member, facilitating replacement, Device.

A vacuum hopper device for a vacuum degassing apparatus according to an embodiment of the present invention includes a connection pipe member connected to a vacuum degassing facility for refluxing molten steel in a converter to degas the product, a connection pipe member connected to an upper end of the connection pipe member, A hopper body in which a feed provided by a gas facility is stored, a sealing member provided between the hopper body and the connecting tube member and sealed to be sealed, and a sealing member provided adjacent to the sealing member to cool the sealing member by circulating cooling water And a cooling jacket portion.

Further, the cooling jacket portion of the vacuum hopper device for a vacuum degassing apparatus according to an embodiment of the present invention may be provided to circulate around the sealing member.

In addition, the sealing member of the vacuum hopper apparatus for a vacuum degassing apparatus according to an embodiment of the present invention may be provided in a ring-shaped rubber material.

Further, the hopper body of the vacuum hopper device for vacuum degassing apparatus according to an embodiment of the present invention includes a lower body coupled to the coupling pipe member and provided in a cone shape having a smaller diameter as it goes down, And a manhole portion coupled to the upper body and protruding from the side wall of the upper body, the manhole portion being connected to one end of the upper body coupled to the side wall of the upper body, An inner cover hingedly provided to be opened and closed, and an outer cover provided to be hermetically sealed by bolts.

The vacuum hopper for vacuum degassing system according to one embodiment of the present invention further comprises a supply adjusting unit provided to open and close a discharge hole formed at a lower end of the hopper body coupled with the coupling tube member, Wherein the upper and lower driving cylinders are provided to the upper end of the hopper body so as to be connected to the closing plate to vertically move the closing plate, And a support frame connected to the upper end of the body and the upper and lower drive cylinders and provided in a hollow rectangular parallelepiped shape.

Further, the hopper body of the vacuum hopper device for vacuum degassing apparatus according to an embodiment of the present invention includes a lower body coupled to the coupling pipe member and provided in a cone shape having a smaller diameter as it goes down, An upper body coupled to the upper side and provided in a cylindrical shape and having an upper body formed with an inflow hole through which the feed is introduced at an upper end thereof and an antiwear member provided to be padded on the movement path of the feed introduced into the inflow hole, have.

The vacuum hopper device for a vacuum degassing apparatus according to the present invention is characterized in that a cooling jacket portion is provided adjacent to a sealing member so that the sealing member is heated by radiant heat or the like introduced from a connecting pipe member connected to a vacuum degassing facility, There is an advantage that it can be prevented.

Further, the sealing member may be provided in a ring shape to facilitate the replacement, and the inner cover may be provided in the manhole for replacement of the sealing member, so that the manhole is caught or remains in the manhole, There is an advantage that mixing with other feeds can be prevented.

In addition, there is an advantage that the durability of the hopper body can be improved by providing the wear-resistant member and the support frame.

Therefore, the durability of the entire vacuum hopper device for vacuum degassing equipment can be improved and the repairing time can be reduced, so that the productivity of the secondary refining process can be improved.

1 is a cross-sectional view showing a vacuum degassing apparatus including a vacuum hopper apparatus for a vacuum degassing apparatus of the present invention.
2 is a cross-sectional view showing a vacuum hopper device for a vacuum degassing apparatus according to the present invention.
3 is a cross-sectional view showing the vicinity of the cooling jacket in the vacuum hopper apparatus for vacuum degassing apparatus of the present invention.
4 is a perspective view showing the vicinity of a cooling jacket in a vacuum hopper device for a vacuum degassing apparatus according to the present invention.
FIG. 5 is a cross-sectional view illustrating a manhole portion of a hopper body in a vacuum hopper for a vacuum degassing apparatus according to the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventive concept. Other embodiments falling within the scope of the inventive concept may readily be suggested, but are also considered to be within the scope of the present invention.

The same reference numerals are used to designate the same components in the same reference numerals in the drawings of the embodiments.

The vacuum hopper apparatus 1 for a vacuum degassing apparatus according to the present invention is capable of improving the life of the sealing member 30 provided for sealing between the hopper body 20 and the connecting pipe member 10 .

That is, the vacuum hopper apparatus 1 for a vacuum degassing apparatus of the present invention is provided with a cooling jacket portion 40 adjacent to the sealing member 30 so that the sealing member 30 is connected to the vacuum degassing apparatus 2 It is possible to prevent the durability from being reduced due to heat received by radiant heat or the like flowing in from the connecting connector member 10.

The sealing member 30 can be provided in a ring shape to facilitate the replacement and the inner cover 23a can be provided in the manhole portion 23 for replacement of the sealing member 30, ), So that it is possible to prevent the difference in the supply amount of the feed or the mixing with the other feed.

It is also possible to provide the wear-resistant member 26 and the support frame 53 to improve the durability of the hopper body 20. [

Accordingly, it is possible to improve the durability and repair time of the entire vacuum hopper apparatus 1 for vacuum degassing apparatus, thereby improving the productivity of the secondary refining process.

1 is a cross-sectional view showing a vacuum degassing apparatus 2 including a vacuum hopper apparatus 1 for a vacuum degassing apparatus according to the present invention, FIG. 2 is a sectional view showing a vacuum hopper apparatus 1 for a vacuum degassing apparatus according to the present invention, Fig.

1 and 2, a vacuum hopper apparatus 1 for a vacuum degassing apparatus according to an embodiment of the present invention is connected to a vacuum degassing apparatus 2 for refluxing and degassing molten steel in a converter 3 A hopper body 20 connected to the upper end of the connecting pipe member 10 and storing a supply to the vacuum degassing apparatus 2, a hopper body 20, And a cooling jacket portion (40) provided adjacent to the sealing member (30) for circulating and supplying cooling water to cool the sealing member (30) ).

Further, the sealing member 30 of the vacuum hopper apparatus 1 for a vacuum degassing apparatus according to an embodiment of the present invention may be provided in a ring-shaped rubber material.

In the vacuum hopper apparatus 1 for a vacuum degassing apparatus according to an embodiment of the present invention, a discharge hole 24 formed in a lower end portion of the hopper body 20 coupled with the connection pipe member 10 is opened Wherein the supply regulating portion (50) is provided with a closing plate (51) provided larger than the diameter of the discharging hole, and a closing plate (51) connected to the closing plate (51) The upper and lower driving cylinders 52 and 52 are provided so as to support the upper and lower driving cylinders 52 and the upper and lower driving cylinders 52 provided at the upper ends of the hopper bodies 20 so as to move the hopper bodies 20, And a support frame 53 provided in a hollow rectangular parallelepiped shape.

The hopper body 20 of the vacuum hopper apparatus 1 for a vacuum degassing apparatus according to an embodiment of the present invention is connected to the coupling pipe member 10 and has a cone shape having a smaller diameter as it goes downward An upper body 22 connected to the upper side of the lower body 21 and provided in a cylindrical shape and having an inlet hole 25 through which the feed is introduced, And an abrasion-resistant member 26 padded on the path of the feed into the hole 25.

The connection pipe member 10 may be connected to the vacuum degassing apparatus 2 and may be configured to transmit a feed such as iron alloy stored in the hopper body 20 to be described later to the vacuum degassing apparatus 2 .

That is, the connection pipe member 10 has a lower end connected to the vacuum degassing apparatus 2 and an upper end connected to the hopper body 20.

The hopper body 20 may serve to temporarily store a feed such as ferro-alloy to supply the vacuum degassing equipment 2.

That is, the hopper body 20 can serve as a reservoir for storing the feed such as the ferro-alloy. In the past, the storage capacity of the hopper body 20 was 2.0 m 3, but the capacity was increased to 4.73 m 3 . By increasing the storage capacity in this way, the number of times of feeding the feed to be supplied to the vacuum degassing apparatus 2 can be reduced, and the burden on the durability of the entire apparatus can be reduced.

Such a capacity increase can increase the input capacity of the feed from 2.0 ton to 4.0 ton, and it is possible to shorten the number of times of three times of feeding, which is nine minutes, to two times of feeding of six minutes.

The hopper body 20 may include a lower body 21, an upper body 22, a manhole 23, a discharge hole 24, an inlet hole 25, an abrasion- have.

The lower body 21 means the lower end portion of the hopper body 20 and the lower end body 21 is provided below the hopper body 20 in order to facilitate the movement of the feedstock introduced into the hopper body 20 to the coupling pipe member 10. [ Portion may be provided with a small diameter corresponding to the diameter of the connecting tube member 10 and the upper portion may have a cone shape having a wide diameter to be connected to the upper body 22, A discharge hole 24 for discharging the fluid to the connection pipe member 10 may be formed.

The discharge hole 24 is preferably provided at a diameter corresponding to the diameter of the coupling pipe member 10 and may be provided to be adjusted by the supply adjusting unit 50 to be described later.

The upper body 22 corresponds to the upper end of the hopper body 20 and may be provided in the form of a cylinder to increase the storage capacity of the feed into the hopper body 20. That is, the lower end body 21 is connected to the lower part and the inflow hole 25 through which the feed can be introduced is formed at the upper part, A supply adjusting unit 50 for adjusting opening and closing can be installed.

The inlet hole 25 is a portion through which the feed water flows into the hopper body 20 and can serve as an inlet.

In addition, there may be a problem that holes are formed on the movement path of the supply of the supply water to the discharge hole 24 due to friction with the supply, The wear-resistant member 26 may be padded on the path through which the feed moves.

That is, the abrasion-resistant member 26 may be provided to the upper body 22 and the lower body 21 continuously from the inflow hole 25 to the discharge hole 24. The wear resistant member 26 is preferably made of a material having excellent wear resistance. For example, a hardox material is preferably used.

The manhole portion 23 can serve as an operator's access for internal repair of the vacuum hopper device 1 for the vacuum degassing apparatus. That is, the manhole portion 23 is provided to be openable and closable to allow an operator to enter and exit.

To this end, the manhole portion 23 may provide an inner cover 23a, an outer cover 23b, and a manhole body. A detailed description of the manhole portion 23 will be described later with reference to Fig.

The sealing member 30 may seal the space between the hopper body 20 and the connecting pipe member 10. [ For this purpose, the sealing member 30 may be provided between the hopper body 20 and the connecting pipe member 10.

In particular, the sealing member 30 may be provided in a ring shape to facilitate replacement, and may be formed of a rubber material so as to enhance the sealing efficiency. As an example, the sealing member 30 may have an outside diameter of 550 mm, an inside diameter of 441 mm, and a thickness of 30 mm.

Meanwhile, in order to prevent the sealing member 30 from being damaged, the cooling jacket unit 40, which will be described later, may be mounted on the connecting pipe member 10, You can provide more. A detailed description thereof will be described later with reference to FIG. 3 and FIG.

The portion of the hopper body 20 to which the sealing member 30 is coupled may be provided with a heat treatment to improve the service life.

The cooling jacket 40 can prevent the sealing member 30 from being deteriorated and damaged early due to radiant heat transmitted through the connecting tube member 10.

That is, the cooling jacket portion 40 is provided adjacent to the sealing member 30, and by cooling the sealing member 30 by circulating the cooling water, the durability due to radiant heat is prevented. A detailed description of the cooling jacket portion 40 will be given later with reference to FIGS. 3 and 4. FIG.

The supply regulating unit 50 may adjust the opening and closing of the discharge hole 24 to adjust the supply of the iron or the like to the vacuum degassing apparatus 2. For this, the supply regulating unit 50 may include a closing plate 51, a vertical driving cylinder 52, a supporting frame 53, and the like.

The closing plate 51 may block the discharge hole 24 to directly open and close the discharge hole 24. The closing plate 51 is connected to the upper and lower driving cylinders 52 and can be vertically moved. The closing plate 51 is formed to be larger than the diameter of the discharging holes 24, It is preferable to be provided so as to prevent clogging.

In addition, the closing plate 51 may be provided in a conical shape in which only the lower end portion is provided in the form of a plate. In this case, the feed accumulated on the upper portion of the closing plate 51 is lowered So that it is possible to prevent the supply amount difference of the supply from being generated.

The up-and-down driving cylinder 52 may serve to provide up-and-down driving force to move the closing plate 51 to the discharge hole 24. For this purpose, the up-and-down driving cylinder 52 may be provided to be coupled to the upper end of the hopper body 20.

However, since the hopper body 20 must support the up-down driving force of the up-down driving cylinder 52, the hopper body 20 may be deformed during the operation of the up-down driving cylinder 52 In order to prevent this, a support frame 53 may be provided.

Further, since the capacity of the up / down driving cylinder 52 must be increased by increasing the capacity of the hopper body 20, the force applied to the upper end portion of the hopper body 20 on which the up / down driving cylinder 52 is installed So that the deformation of the hopper body 20 or the bending of the up and down driving cylinder 52 may occur.

The support frame 53 may support the up and down driving cylinder 52 while driving the up and down driving cylinder 52. To this end, the support frame 53 may be provided between the upper and lower driving cylinders 52 and the upper end of the hopper body 20, and may be provided in a hollow rectangular parallelepiped shape.

FIG. 3 is a cross-sectional view showing the vicinity of the cooling jacket portion 40 in the vacuum hopper device 1 for a vacuum degassing apparatus according to the present invention. FIG. 4 is a cross- Is a perspective view showing the periphery of the jacket portion (40).

3 and 4, the cooling jacket portion 40 of the vacuum hopper device 1 for a vacuum degassing apparatus according to an embodiment of the present invention may be provided to circulate the sealing member 30 have.

That is, in order to prevent the radiant heat of the vacuum degassing apparatus 2 transmitted through the connecting pipe member 10 from deteriorating the performance of the sealing member 30, And is provided so as to circulate around the member (30).

To this end, the cooling jacket portion 40 may be provided adjacent to the sealing member 30, and a cooling water supply pipe 40a through which the cooling water circulates may be connected.

The cooling jacket portion 40 may be provided around the outer periphery of the sealing member 30 to facilitate connection with the cooling water supply pipe 40a and to improve cooling performance.

5 is a cross-sectional view illustrating a manhole portion 23 of the hopper body 20 in the vacuum hopper apparatus 1 for a vacuum degassing apparatus according to the present invention. Referring to FIG. 5, The hopper body 20 of the vacuum hopper apparatus 1 is connected to the connection pipe member 10 and includes a lower body 21 provided in a cone shape having a smaller diameter as it goes down, And a manhole portion 23 protruding from the side wall of the upper body 22. The manhole portion 23 is connected to the upper body 22 and the upper body 22, An inner cover 23a which is hinged to the side wall of the upper body 22 and is provided to be opened and closed and an outer cover 23b which is provided to be sealed by bolt connection at the other end, ).

That is, the manhole portion 23 is provided so as to be openable and closable, and can be provided so as to be accessible to the operator for internal repair of the vacuum hopper apparatus 1 for the vacuum degassing apparatus. For this purpose, An outer cover 23b, and a manhole body.

The manhole body can be provided on the upper body 22 of the hopper body 20 and is provided on the inclined lower body 21 to receive the feed. . The manhole body can be provided with a diameter of 600 mm as an example.

However, since the manhole body is provided by being protruded from the hopper body 20 at a certain distance, there is a problem that the feed water is not accumulated and discharged to the protruding jaw portion, which can be solved by the inner cover 23a .

The inner cover 23a may be provided on the inner side of the manhole body, that is, the portion in contact with the hopper body 20. That is, when the inner cover 23a is closed, the inner cover 23a is provided horizontally with the side wall of the upper body 22, thereby preventing the feedstock from accumulating on the jaw portion of the manhole body.

Meanwhile, the inner cover 23a may be hinged to the manhole body so as to be opened and closed, and a handle may be installed to open the worker.

The outer cover 23b may be further provided with an outer portion of the manhole body so as to more firmly maintain the vacuum state in the hopper body 20. [ To this end, the outer cover 23b may be provided to be bolted to the manhole body, and a handle may be formed to open the worker.

1: Vacuum hopper for vacuum degasser 2: Vacuum degasser
3: converter 10: connecting pipe member
20: hopper body 21: lower body
22: upper body 23: manhole portion
24: exhaust hole 25: inlet hole
26: wear resistant member 30: sealing member
40: cooling jacket part 50: supply control part
51: closing plate 52: upper and lower driving cylinder
53: Support frame

Claims (6)

A connection pipe member connected to a vacuum degassing facility for refluxing molten steel in a converter to degas;
A hopper body connected to an upper end of the coupling pipe member and storing a supply of the vacuum degassing facility;
A sealing member provided and sealed between the hopper body and the connecting tube member; And
A cooling jacket provided adjacent to the sealing member for circulating cooling water to cool the sealing member;
And a vacuum hopper device for vacuum degassing equipment. The method according to claim 1,
Wherein the cooling jacket portion is provided to circulate around the sealing member. The method according to claim 1,
Wherein the sealing member is provided in a ring-shaped rubber material. The method according to claim 1,
Wherein the hopper body comprises:
A lower body coupled to the coupling tube member and provided in a cone shape having a smaller diameter as it goes down;
An upper body coupled to an upper side of the lower body and provided in a cylindrical shape; And
A manhole protruding from the side wall of the upper body;
/ RTI >
In the manhole,
An inner cover provided at one end of the upper body coupled to the upper body, the inner cover being hinged to the side wall of the upper body to be opened and closed; And
An outer cover provided at the other end to be sealed in a bolt connection;
And a vacuum hopper device for vacuum degassing equipment. The method according to claim 1,
A supply regulator provided to open and close a discharge hole formed at a lower end of the hopper body coupled with the coupling tube;
Further comprising:
The supply regulating unit includes:
A closing plate provided larger than the diameter of the discharge hole;
An upper and lower driving cylinder provided at an upper end of the hopper body to be connected to the closing plate to vertically move the closing plate; And
A supporting frame provided to connect the upper end of the hopper body and the upper and lower driving cylinders so as to support the upper and lower driving cylinders and being provided in a hollow rectangular parallelepiped shape;
And a vacuum hopper device for a vacuum degassing apparatus. The method according to claim 1,
Wherein the hopper body comprises:
A lower body coupled to the coupling tube member and provided in a cone shape having a smaller diameter as it goes down;
An upper body coupled to an upper side of the lower body and provided in a cylindrical shape and having an inlet hole through which the feed is introduced at an upper end; And
An abrasion-resistant member provided to be padded on the path of the feed entering the inflow hole;
And a vacuum hopper device for vacuum degassing equipment.

Images