KR20030054482A - An apparatus for preventing air from flowing into batch furnace - Google Patents

Abstract

PURPOSE: An apparatus for preventing external air from penetrating into batch annealing furnace is provided to prevent product defects of coil in advance by blocking the air before oxygen in air introduced into the batch annealing furnace along motor shaft reaches coil directly. CONSTITUTION: In a batch annealing furnace(100) in which cover(140) is enveloped on coils stacked in multistage on base(120) on supporter(180) in such a way the cover is closely adhered to the ground surface, and the coils(110) are annealed by forming high internal atmospheric temperature as atmospheric gas of high temperature supplied to supply line (L) through impeller(160) and diffuser rotated by motor(150) installed at the lower side of the supporter, the apparatus includes a casing(10) installed in the outskirt of motor shaft between the motor(150) and impeller(160); a pressure equalization pipe(30) extended from both sides of the casing(10) to the side of inner cover(140a) to flow the atmospheric gas inside the annealing furnace into the casing(10); a rotation block in which gas opening installed at the upper side of the casing is installed on motor shaft inside the casing(10); a moving disk which is ascended or descended from the motor shaft to the inside of the casing(10) during pressure change according to temperature difference of the outer part of the casing; and an air blocking plate connected to the lower side of the moving disk to block air penetrated through motor grease during annealing as the air blocking plate is being contracted and expanded according to movement of the moving disk.

Description

External air ingress prevention device of batch annealing furnace {AN APPARATUS FOR PREVENTING AIR FROM FLOWING INTO BATCH FURNACE}

The present invention relates to a batch annealing furnace (BATCH FURNACE) for placing a cold rolled coil vertically and then covering the cover and circulating a high temperature gas to anneal the coil as an ambient temperature, in particular a high temperature atmosphere inside the annealing furnace. Oxidative discoloration of the outer shell of the coil due to changes in the thermal reaction of the coil with air oxygen in the atmosphere by preventing outside air from penetrating into the annealing furnace through the motor part of the impeller device used to inject gas. It relates to a device for preventing the penetration of external air of the annealing base to prevent the occurrence of this.

In general, the annealing process is divided into a batch annealing in which the annealing furnace is continuously annealed while the material is continuously progressed and the coils are placed in a vertical line, and then the annealing cover is covered to increase the atmosphere temperature. A conventional batch annealing operation is shown, and such batch annealing is also referred to as heat annealing in a box.

That is, as shown in Figure 1, after removing the rolled oil through the clean facility to load the coil 110 wound around the base 120 in a state in which the convector 130 is sandwiched in about three stages in between Then, the inner cover 140a and the outer cover 140b are covered to inject and circulate high-temperature atmosphere gas to repeat the heating and cooling by convection, radiation, and conduction of heat. The material of the coil product can be obtained.

On the other hand, the batch annealing furnace 100 for heating the loaded coil 110 as described above is divided into an upper facility and a lower facility around the ground (G), the lower facility is the atmosphere gas inside the cover 140 A motor 150 for uniformly circulating (G) is installed, and an impeller 160 is mounted thereon, so that when the impeller 160 is rotated as a motor, the circulation force (Fig. Arrow 1) to transfer the atmosphere heat over the entire portion of the coil 110 inside the cover 140.

In addition, the ground equipment of the batch annealing 100 includes a diffuser (unsigned) to help diffuse the atmosphere gas G, and the support 180 on which the base 120 supporting the weight of the coil 110 is placed is provided. The atmosphere gas supplied therebetween flows, and the thermocouple 170a which measures the atmospheric temperature inside the annealing furnace 100, and the other thermocouple 170b which measures the temperature of a coil are provided, and the support 180 of the said support 180 is provided. At the outer periphery, when the sealing part 182 is formed by inserting the inner cover 140a into the outer periphery, a gas supply line L for supplying the atmosphere gas G through the ground G is installed.

On the other hand, as shown in Figure 2, the heat-resistant grease 152 supplied through the grease supply pipe 152a is filled in the lower motor 150 of the fixed base 150a which is bolted to the lower portion of the ground (G). Since the heat-resistant grease 152 must have heat resistance, internal bubbles are generated by the shaft 154 passing through the grease layer 152 when the motor rotates due to its low viscosity. Due to chemical changes that occur and the viscosity is not maintained normally, it often flows down inside the motor, and in particular, the grease 152 whose viscosity is lowered due to the pressure applied when the grease 152 is injected, is the shaft of the motor 150. 154 and up the bushing 154a installed on the motor base 150a to support it are burned by the high temperature ambient temperature in the center of the support 180, in which case the coil 110 There is a problem in that it causes the oxidation of the outer skin by causing contamination.

In addition, when the pressure changes in the process, the pressure in the inner cover 140a changes when the impeller 160 rotates as the motor 150 rotates. When passing through the diffuser, the pressure inside the motor 150 is changed. Since the negative pressure becomes a vacuum, small holes as small as needles are formed in the portion filled with grease 152, and air in the atmosphere penetrates into the inner cover 140a by the suction force.

Therefore, when the external temperature drops during desorption and the pressure is sharply reduced, oxygen in the air and the hot coil 110 react with each other to cause oxidative discoloration, thereby causing a fatal defect in the coil 110, thereby degrading the quality of the produced coil product. It is to let.

The present invention has been made in order to improve the various problems as described above, the object is that the oxygen in the air flowing through the motor shaft inside the batch annealing furnace is blocked before reaching the coil directly defective product of the coil It is to provide a device for preventing the penetration of external air to a batch annealing furnace to prevent the fire.

1 is a configuration diagram showing the overall configuration of a conventional batch annealing furnace

2 is a schematic view showing the infiltration of the motor grease in the conventional batch annealing furnace and the internal penetration of air through the annealing furnace

Figure 3 is a block diagram showing the installation state of the external air intrusion prevention apparatus of the batch annealing furnace according to the present invention

Figure 4 is a perspective view of the present invention air penetration prevention device

Figure 5 is a perspective view of the main part showing the present invention air penetration prevention device

Figure 6 is an exploded perspective view showing a moving disk of the present invention device

Figure 7 is a perspective view of the air blocking plate of the present invention device

* Explanation of symbols for the main parts of the drawings

1 .... Anti-ingression device 10 ... Casing

30 .... Equalizing tube 40 .... Rotary block

50 ... Moving disc 70 ... Air blocking plate

100 .... Batch annealing furnace 120 .... Base

140 .... Cover 150 .... Motor

160 .... Impeller

As a technical configuration for achieving the above object, the present invention is to cover the cover on the ground on the coil stacked in multiple stages on the base on the supporter to the supply line through the impeller and diffuser rotating as a motor installed under the support A batch annealing furnace for annealing coils by forming a high temperature internal atmosphere temperature as a high-temperature atmosphere gas to be supplied, comprising: a casing provided outside the motor shaft between the motor and the impeller;

A pressure equalizing tube extending to both sides of the casing to the inner cover side to introduce an atmosphere gas inside the annealing furnace into the casing;

A rotary block having a gas opening installed at an upper side of the casing on an inner motor shaft of the casing;

A moving disc installed to move up and down at the motor shaft to the inside of the casing when the pressure changes due to a temperature difference outside the casing; And,

It is connected to the lower side of the moving disk is contracted and expanded in accordance with the movement of the moving disk to block the air infiltrated through the motor grease during annealing; by providing an apparatus for preventing the penetration of external air of the batch annealing furnace configured as .

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is a block diagram showing the installation state of the external air intrusion prevention apparatus of the batch annealing furnace according to the present invention, Figure 4 is a perspective view showing the air intrusion prevention apparatus of the present invention, Figure 5 is the present invention air penetration prevention apparatus 6 is an exploded perspective view showing a moving disc of the device of the present invention, and FIG. 7 is a perspective view showing an air barrier plate of the device of the present invention.

4 shows the overall configuration of the apparatus 1 of the present invention, the apparatus 1 of the present invention is largely the casing 10, the equalizing tube 30, the rotary block 40 and the moving disk 50. And air blocking member 70, each of these components 10, 30, 40, 50, 70 will be described in more detail as follows.

First, FIG. 3 shows an installation state of the apparatus 1 according to the present invention. The batch annealing furnace 100 in which the apparatus 1 of the present invention is installed is multistage on the base 120 on the supporter 180. The high temperature supplied to the supply line (L) through the impeller 160 and the diffuser that rotates as a motor 150 installed under the support and cover the cover 140 to the ground (G) in close contact on the stacked coil 110 Is formed so as to form a high temperature internal atmosphere temperature as the atmospheric gas G, to anneal the coil 110.

Next, FIGS. 3 and 4 show the casing 10 of the device 1 of the present invention, wherein the casing 10 of the present invention comprises a motor shaft between the motor 150 and the impeller 160. It is installed outside the 154.

That is, the casing 10 has a lower portion closely fixed to the motor base 150a, and an opening 12 through which the motor shaft 154 passes is formed at the upper portion thereof, and the opening 12 and the motor shaft ( It is composed of a hollow cylindrical body provided with a seal 14 between the 154, and is closely mounted by welding or the like while the bottom portion is opened on the upper base 150a of the motor 150, the seal 14 is Asbestos sealing material is used to increase the sealing property while preventing wear caused by the rotating shaft 154.

Next, Fig. 4 and Fig. 5 shows the pressure equalizing tube 30 of the apparatus 1 of the present invention, the pressure equalizing tube 30 of the present invention, the inner cover (140a) on both sides of the casing (10) Is installed to extend to the side of the annealing furnace so as to introduce the internal atmosphere gas (G) into the casing (10). At the end of the pressure equalizing pipe (30), the inlet of the atmosphere gas (G) inside the cover is introduced. The smooth inlet diameter is expanded and the bent inlet 32 is integrally formed.

Next, Fig. 5 and Fig. 6 shows the rotary block 40 of the device 1 of the present invention, the rotary block 40 of the present invention has its inner winding part assembled to the motor shaft 154 It is installed so as to be rotated integrally with the motor shaft 154, the rotary block 40 is formed through a plurality of the gas opening 42, such gas opening 42 is the upper opening and the lower opening Slightly inclined in the rotation block 40 is alternately facilitated turbulence generation during gas passage.

And, as shown in Figure 5, the rotary block 40 is provided with a plurality of induction plate 44 to guide the gas introduced into the casing 10 radially of the rotary block 40 is provided have.

Next, FIG. 5 and FIG. 6 show the moving disk 50 of the apparatus 1 of the present invention, the moving disk 50 of the present invention is the pressure change according to the temperature difference outside the casing 10. It is provided to move up and down at the motor shaft 154 inside the casing 10.

That is, as shown in FIG. 6, the movable disc 50 is supported in the form of a spline as a key 56 on a guide block 54 fixed to the motor shaft 154 via a bearing block 52. It is integrally mounted on the outer circumference of the moving block 58.

In addition, the guide block 54 and the moving block 58, the key grooves 54a and 58a into which the key 56 is inserted are integrally formed in the longitudinal direction, and the guide block 54 has a gas passage 60 therein. ) Is integrally formed through one side of the key groove, and such a moving disk 50 is formed such that its outer circumference has a diameter in close contact with the inner wall of the casing 10.

4 and 7 show the air barrier plate 70 of the device 1 of the present invention, which is connected to the lower side of the movable disc 50. FIG. It is configured to block the air penetrated through the motor grease 152 during annealing while being contracted and expanded in accordance with the movement of the moving disk.

That is, as shown in Figure 7, the inner end of the air blocking plate 70, the thermal ring in the circumferential direction of the fixed block 74 fixed to the motor shaft 154 via a bearing block 72 ( 76 is connected to the outer end of the blocking plate 70, the lower end of the connecting arm 80 connected by the connecting ring 78 in the circumferential direction of the movable block 58 is connected as a connecting ring 82 and adjacent It overlaps with the blocking plate up and down, and consists of a triangular shape which contracts and expands as the moving block 58 moves up and down integrally with the moving disk 50 described below.

In this case, the triangular air blocking plate 70 is overlapped with each other in the circumferential direction of the casing 10 and contracted when the moving disc 50 is raised and expanded when falling, to prevent air infiltration, and the connection arm 80 ) Has a configuration in which a heating coil 84 is heated to dilute oxygen in air penetrated through the blocking plate.

Referring to the operation of the present invention made in the above configuration in more detail as follows.

As shown in FIGS. 3 to 7, in the conventional batch annealing path 100, air is prevented from penetrating along the motor shaft 154 through the grease portion 152 of the motor 150. A pressure equalizing tube installed in the casing 10 so as to raise the inside of the casing 10 of the apparatus 1 of the present invention, such as the pressure of the inner cover 140a so that air is not sucked in by the suction force, that is, to maintain it higher than atmospheric pressure ( Atmospheric gas G of a high temperature, ie, approximately 700 ° C. longevity, circulated as the impeller 160 is introduced into the casing 10 through the opening 32 of 30.

At this time, the rotary block 40 installed inside the casing 10 is the atmospheric gas flows down through the guide plate 44 and the gas opening 42, the rotary block 40 is rotated, which This is because the atmosphere gas G impinges upon the guide plate 44 of the rotary block 40 while flowing downward through the gas opening 42 to impact the guide plate and rotate it.

Next, when the high-temperature atmosphere gas G flows downward while the rotary block 40 rotates, the gas passage 60 of the guide block 54 fixed to the motor shaft 154 via the bearing 52 is opened. Through the gas flows down while forming a turbulent flow by the rotation block 40.

At this time, the guide disk 54 and the moving disk 50 of the moving block 58, which is key-assembled in the form of a spline shaft are integrally formed across the casing 10 so as to flow in and form a turbulent atmosphere gas (G). Descends by).

Thus, as shown in FIG. 7, the circumference of the fixed block 74 fixed to the motor shaft 154 via a bearing block 72 and fixed as a fixed bar 74a inside the casing 10. Air blocking plate 70 connected to the thermal ring 76 in the direction adjacent to the lower end of the connecting arm 80 connected by the connecting ring 78 to the lower side of the moving block 58 while being connected as a connecting ring 82 When the moving block 58 is lowered by the lowering of the movable disc 50, the air blocking plate 70 is extended inside the casing 10 as the umbrella is opened.

As a result, the high pressure atmosphere gas 10 flows into the casing, and the atmospheric gas G is turbulent in the casing 10 with the internal pressure of the casing 10 being equal to the internal pressure of the inner cover 140a. By lowering 50 and unfolding the air barrier plates 70 integrally, air is generated due to lack of grease in the motor and air penetrating along the motor shaft is primarily blocked inside the casing 10.

On the other hand, the connecting arm 80 is provided with a heating coil 84, when the high-temperature atmosphere gas (G) is introduced into the casing 10 is heated state, and eventually the outside air penetrates the air blocking plate When passing 70, the heating coil 84 dilutes oxygen in the air to prevent surface discoloration of the coil 110 by oxygen.

In addition, when the operation of the batch annealing furnace 100 is stopped, that is, when the internal temperature of the inner cover 140a is cooled from 700 ° C to 300 ° C without supplying a high-temperature atmosphere gas, the inner cover 140a is provided. The internal pressure of the casing 10 is higher than the internal pressure of the inner cover 140a as the temperature of the atmosphere gas decreases, so the atmosphere gas inside the casing 10 is cooled in the inner casing 10 as opposed to now. (140a) is discharged to the outside through the inlet pipe 30 to the inside, and eventually the rapid vacuum state of the moving disk 50 is raised, with the air barrier plate 70 is switched to shrink in a state overlapping each other, annealing again When the furnace 100 is heated, the atmosphere gas G flows into the casing.

At this time, when air has penetrated the inside of the casing 10, the annealing furnace 100 is cooled, so it does not cause oxidation discoloration on the surface of the oxygen yarn coil in the air. Oxygen is rapidly oxidized, but is pre-diluted as the heating coil 84 while the infiltration is blocked inside the casing 10 of the present invention so as not to affect the coil.

Accordingly, by effectively blocking the oxidation discoloration of the coil by air permeation as the apparatus 1 of the present invention, the annealing defect of the coil is prevented in advance.

Thus, according to the inventors of the present invention, the external air infiltration prevention device of the batch annealing furnace, the outside air penetrates into the annealing furnace through the motor portion of the impeller device used to inject a high-temperature atmosphere gas into the interior of the annealing furnace. By preventing the change of the thermal reaction of the coil with the air oxygen in the atmosphere, it provides an excellent effect of preventing the oxidation discoloration in the outer skin portion of the coil.

Therefore, it is to improve the quality of the coil product by blocking the product defect factors during coil annealing.

While the invention has been shown and described with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit or scope of the invention as set forth in the claims below. I would like to know that those who have knowledge of this can easily know.

Claims (5)

The impeller 160 and the diffuser are rotated as a motor 150 installed under the support, covering the cover 140 on the ground G on the coil 110 stacked on the base 120 on the supporter 180. In the batch annealing furnace 100 for annealing the coil 110 by forming a high temperature inside atmosphere temperature as a high temperature atmosphere gas (G) supplied through the supply line (L), A casing 10 installed outside the motor shaft 154 between the motor 150 and the impeller 160; A pressure equalizing pipe (30) installed at both sides of the casing (10) to extend to the inner cover (140a) side and introducing an annealing furnace internal atmosphere gas (G) into the casing (10); And a rotary block (40) having a gas opening (42) installed at an upper side of the casing on the inner motor shaft (154) of the casing (10). A moving disk 50 installed to move up and down at the motor shaft 154 to the inside of the casing 10 when the pressure changes due to a temperature difference outside the casing; And, An air barrier plate (70) connected to the lower side of the movable disc (50) to contract and expand according to the movement of the movable disc to block air penetrated through the motor grease (152) during annealing; External air penetration prevention device of annealing furnace The casing 10 has a lower portion tightly fixed on the motor base 150a, and an opening 12 through which the motor shaft 154 passes is formed at the upper portion of the casing 10, and the opening 12 And a hollow cylindrical body provided with a sealing 14 between the motor shaft 154, The end portion of the pressure equalizing pipe 30 connected to both sides of the casing 10 has a diameter that facilitates the inflow of the atmosphere gas (G) inside the cover is arranged, characterized in that the inlet 32 is formed integrally formed External air ingress prevention device of annealing furnace According to claim 1, wherein the rotary block 40, the inner peripheral portion is keyed to the motor shaft 154 is configured to rotate driving integrally with the motor shaft 154, The rotary block 40 is formed through the plurality of curved gas openings 42, The radial block of the rotary block 40 is a device for preventing the penetration of external air in the batch annealing furnace, characterized in that a plurality of guide plates 44 for inducing gas introduced into the casing 10 is installed. According to claim 1, wherein the movable disk 50 is a moving block which is supported in a spline form as a key 56 to the guide block 54 fixed to the motor shaft 154 via a bearing block 52 ( Integrally mounted on the outer periphery of 58), The guide block 54 and the moving block 58 are integrally formed in the longitudinal direction with the key grooves 54a and 58a into which the key 56 is inserted, and the gas passage 60 is provided in the guide block 54. Is integrally formed through one side of the key groove, The moving disc 50 is the outer periphery of the external air intrusion prevention apparatus of the batch annealing furnace, characterized in that configured so as to have a diameter close to the inner wall of the casing 10 According to claim 1, The inner end of the air blocking plate 70 is connected to the heat ring 76 in the circumferential direction of the fixed block 74 fixed to the motor shaft 154 via a bearing block 72. The outer end of the blocking plate 70 is connected to the lower end of the connecting arm 80 connected by the connecting ring 78 in the circumferential direction of the moving block 58 as a connecting ring 82, and the upper and lower adjacent plates. Consisting of a triangular shape that contracts and expands, The triangular air blocking plate 70 overlaps with each other in the circumferential direction of the casing 10 and contracts when the moving disc 50 rises and expands when descending to prevent air infiltration, and the connection arm 80 includes: A device for preventing the penetration of external air into a batch annealing furnace, characterized in that a heating coil 84 is wound to dilute oxygen in the air penetrated through the blocking plate.