JP2008240081A - Hot dip plating equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To minimize the risk that a steel sheet in the process of production is oxidatively deteriorated in case of power failure generation. <P>SOLUTION: A steel sheet S passes through a deflector roll 122 in an introduction chamber 120, is introduced into a channel 112, and moves from the lower part to the upper part in a body vessel 111. At this time, a molten metal M sticks to the steel sheet S, and plating is performed. In the introduction chamber 120 and the introduction passage 121, inert gas is filled, so as to prevent the oxidative deterioration of the steel sheet S. In case power failure is generated, seal plates 131a, 131b in an atmosphere shielding apparatus 130 are made to come close to each other, and sandwich the steel sheet S, and, by the seal plates 131a and 131b closed in this way, the inside of the introduction chamber 120 is partitioned into the downstream side space 120a and the upstream side space 120b. In this way, after the molten metal is made to flow out, the air is made to flow into the downstream side space 120a, but is not made to flow into the side of the upstream side space 120b, and the steel sheet S on the upstream side of the upstream side space 120b is not exposed to the air, and is prevented from being oxidatively deteriorated. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hot dipping facility, and is devised so as to minimize damage caused by oxidative degradation of a steel sheet during manufacture even when a power failure occurs by providing an atmosphere shut-off device.

The procedure for producing a hot-dip metal-plated steel sheet is generally as follows. That is, the steel plate is first rolled, the surface of the rolled steel plate is pickled, the pickled steel plate is annealed, and molten metal (for example, molten zinc) is attached (plated) to the surface of the annealed steel plate.
Note that annealing is performed inside an annealing furnace that is in a non-oxidizing or reducing atmosphere, and adhesion of molten metal is performed by a hot dipping apparatus.

Here, an example of the hot dipping apparatus will be described with reference to FIG. The hot dipping apparatus 10 shown in FIG. 7 is a so-called “aerial pot” plating apparatus.
In the main body container 11 of the hot dipping apparatus 10, molten metal (hot zinc) M is stored. A channel 12 through which the steel plate S passes is formed on the bottom surface of the main body container 11. An electromagnetic force generator 13 is arranged around the channel 12. A pair of air nozzles 14 is disposed above the main body container 11 with the steel plate S interposed therebetween.

An introduction chamber 20 is formed below the main body container 11, and an introduction passage 21 communicates with the introduction chamber 20. The introduction chamber 20 is a room surrounding the channel 12 and the electromagnetic force generator 13, and a deflector roll 22 and a guide roll 23 are arranged in the introduction chamber 20.
The sealed introduction chamber 20 and introduction passage 21 are filled with non-oxidizing or reducing gas and kept in an inert atmosphere. The introduction passage 21 is connected to an annealing furnace maintained in an inert atmosphere state.

  The steel sheet S annealed in the annealing furnace and sent through the introduction passage 21 is pulled upward through the deflector roll 22, guided by the guide roll 23, penetrates the channel 12, and moves downward in the main body container 11. Move upward from When the steel plate S passes through the main body container 11, the molten metal M stored in the main body container 11 adheres to the surface of the steel plate S. And when the steel plate S moves upward from the liquid level of the molten metal M, the air ejected from the air nozzle 14 removes the excess molten metal M adhering to the surface of the steel plate S. A coating layer made of molten metal M can be formed (plated) on the surface of the steel sheet S.

  The molten metal M in the main body container 11 is held by the Lorentz force (electromagnetic force) generated from the electromagnetic force generator 13 without flowing downward from the channel 12 (see, for example, Patent Document 1).

Japanese Patent No. 3811817 Patent No. 2814306 Japanese Patent No. 3402932

By the way, in the hot dipping apparatus 10 shown in FIG. 7, when the power supply to the electromagnetic force generator 13 is stopped due to a power failure or the like, the generation of magnetic flux disappears and the Lorentz force disappears. Fall through. When the molten metal M in the main body container 11 is completely removed, the external atmosphere flows into the introduction chamber 20 and the introduction passage 21 via the channel 12.
In this way, when the atmosphere flows into the introduction chamber 20 or the introduction passage 21, the introduction chamber 20, the introduction passage 21, and further the steel sheet S present in the annealing furnace is oxidized by oxygen in the atmosphere. The quality will deteriorate.
The steel sheet S thus oxidized and deteriorated becomes a defective product as a product, and the loss increases.

Therefore, various devices have been conventionally used to prevent such problems.
(1) In the first example of the conventional device, when the electromagnetic force generator stops functioning due to a power failure or the like, the steel plate is cut and the channel is closed at the lower end of the channel (see, for example, Patent Document 2). .
(2) In a second example of the conventional device, a seal mechanism is provided at a position downstream of the deflector roll with respect to the flow direction of the steel sheet, and if the electromagnetic force generator does not function due to a power failure or the like, It was sealed by a mechanism (see, for example, Patent Document 3).

  By the way, in the first example of the conventional device described above, since the steel plate is cut, it is necessary to pass the steel plate through the channel or the container body again at the time of restoration, and much work and time are required for the restoration work. It was over.

  Further, in the second conventional example described above, the air does not flow into the upstream side (introduction passage or annealing furnace) from the sealing mechanism with respect to the flow direction of the steel plate, but the steel plate existing between the deflector roll and the channel. (The steel plate present in the introduction chamber) is exposed to the atmosphere, and this portion of the steel plate becomes a defective product.

  In the present invention, in view of the above prior art, even if the electromagnetic force generation device does not function due to a power failure or the like, and the molten metal in the main body container of the hot dipping apparatus flows out through the channel, the region where the steel plate is exposed to the atmosphere. An object of the present invention is to provide a hot dipping equipment that can minimize the occurrence of defective products.

The configuration of the present invention for solving the above problems is as follows.
A main body container for storing molten metal, a channel formed on the bottom surface of the main body container, and an electromagnetic force that is disposed in a state of sandwiching the channel and generates an electromagnetic force that prevents the molten metal from flowing out through the channel. A hot dipping apparatus having a generator;
An introduction chamber that is disposed on the lower side of the hot dipping apparatus and in which an internal space is defined as an inert space, and a steel plate is introduced into the channel via the deflector roll,
In hot dipping equipment equipped with
An atmosphere blocking device is disposed between the deflector roll and the channel;
The atmosphere blocking device is:
A pair of seal plates that are arranged opposite to each other with the steel plate in between and are capable of moving toward and away from the steel plate,
When electricity is supplied to the electromagnetic force generating device, the seal plates are separated from each other, and when the electric supply to the electromagnetic force generating device is stopped, the seal plates are brought close to each other to bring the steel plate into the seal plate And a seal plate operating mechanism for moving the seal plate so that the introduction chamber is partitioned into a space on the downstream side and a space on the upstream side of the seal plate.

The configuration of the present invention is as follows.
The seal plate operating mechanism includes an electrical mechanism for applying a force to the pair of seal plates so as to separate the seal plates when electricity is supplied, and a pair of the seal plates so as to bring the seal plates close to each other. A mechanical mechanism for applying a force to the sealing plate, and the force of the electrical mechanism is set larger than the force of the mechanical mechanism.

The configuration of the present invention is as follows.
The seal plate is formed of a ceramic fiber.

According to the present invention, when a power failure occurs, the seal plate actuating mechanism divides the introduction chamber into the downstream space and the upstream space, so that even if the air flows into the introduction chamber via the channel, this air remains in the downstream space. It flows in, but does not flow into the upstream space.
Therefore, among the steel plates whose conveyance has been stopped due to a power failure, the atmosphere does not enter the upstream side of the upstream space where the deflector roll is arranged, and the steel plates existing upstream of the upstream space Quality can be maintained without touching.
For this reason, even if air flows into the introduction chamber, the amount (length) of damage to the steel sheet is limited, and damage can be minimized.

  Hereinafter, the best mode for carrying out the present invention will be described in detail based on examples.

  1 to 3 show a hot dipping apparatus 100 according to a first embodiment of the present invention. 1 shows a state when normal operation is performed, and FIGS. 2 and 3 show a state when a power failure occurs.

  As shown in FIGS. 1 to 3, a hot dipping apparatus 100 according to the first embodiment is provided in a hot dipping apparatus 110, an introduction chamber 120 disposed below the hot dipping apparatus 110, and the introduction chamber 120. The atmosphere blocking device 130 and the molten metal recovery device 140 disposed in the introduction chamber 120 are configured.

  A molten metal (molten zinc) M is stored in the main body container 111 of the hot dipping apparatus 110. A channel 112 through which the steel sheet S passes from below to above is formed on the bottom surface of the main body container 111. The electromagnetic force generator 113 is disposed with the channel 112 interposed therebetween. A pair of air nozzles 114 is disposed above the main body container 111 with the steel plate S interposed therebetween.

The electromagnetic force generator 113 includes a two-pole magnetic field generator 113a in which a coil is wound around a core having two yokes, and a two-pole magnetic field generator 113b in which a coil is wound around a core having two yokes. The magnetic field generators 113a and 113b are arranged with the channel 112 interposed therebetween. A commercial current (current having a frequency of 50 Hz or 60 Hz) is supplied to each of the magnetic field generators 113a and 113b.
The Lorentz force (electromagnetic force) is generated by the alternating magnetic flux generated from the magnetic field generators 113 a and 113 b of the electromagnetic force generator 113, and the molten metal M is prevented from flowing downward through the channel 112 due to the electromagnetic force. is doing.

  An introduction chamber 120 is disposed below the hot dipping apparatus 110, and an introduction passage 121 communicates with the introduction chamber 120. A deflector roll 122 is disposed in the introduction chamber 120.

  The internal spaces of the introduction chamber 120 and the introduction passage 121 that are sealed are filled with a non-oxidizing or reducing gas and maintained in an inert atmosphere state. The introduction passage 121 is connected to an annealing furnace maintained in an inert atmosphere state. Thus, by making the internal space of the introduction chamber 120 and the introduction passage 121 into an inert space, the steel plate S being conveyed is prevented from being oxidized.

  The atmosphere blocking device 130 is disposed in the introduction chamber 120. Further, the arrangement position will be described in detail. The atmosphere blocking device 130 is along the conveying direction of the steel sheet S, downstream from the deflector roll 122 and upstream from the channel 112, in other words, the introduction chamber 120 is connected to the downstream space 120a. And the upstream space 120b.

  The atmosphere blocking device 130 includes seal plates 131a and 131b and seal plate operating mechanisms 132a and 132b.

  The seal plates 131a and 131b are arranged in a state of being opposed to each other with the steel plate S interposed therebetween, and the seal plates 131a and 131b can be moved toward and away from each other within a horizontal plane (in FIG. 1 and FIG. 2, they can move in the left-right direction). Is arranged). The seal plates 131a and 131b are made of, for example, ceramic fibers.

  The seal plate operating mechanism 132a has an electrical pulling mechanism (for example, an electromagnet) and a mechanical pushing mechanism (for example, a spring mechanism). When electricity is supplied, the electrical pulling mechanism pulls the seal plate 131a toward the seal plate actuating mechanism 132a, and the mechanical pushing mechanism pushes the seal plate 131a from the seal plate actuating mechanism 132a to the steel plate S side. Is energized. Moreover, the electrical tensile force is set to be larger than the mechanical pushing force.

  For this reason, when electricity is supplied to the seal plate operating mechanism 132a, the seal plate 131a is pulled toward the seal plate operating mechanism 132a and is located away from the steel plate S as shown in FIG. On the other hand, when electricity is not supplied to the seal plate operating mechanism 132a, the seal plate 131a is pushed out of the seal plate operating mechanism 132a and moves toward the steel plate S as shown in FIG.

  Similarly, the seal plate operating mechanism 132b has an electrical tension mechanism (for example, an electromagnet) and a mechanical push-out mechanism (for example, a spring mechanism). When electricity is supplied, the electrical pulling mechanism pulls the seal plate 131b toward the seal plate operating mechanism 132b, and the mechanical pushing mechanism pushes the seal plate 131b from the seal plate operating mechanism 132b to the steel sheet S side. Is energized. Moreover, the electrical tensile force is set to be larger than the mechanical pushing force.

  For this reason, when electricity is supplied to the seal plate operating mechanism 132b, the seal plate 131b is pulled toward the seal plate operating mechanism 132b and is located away from the steel plate S as shown in FIG. On the other hand, when electricity is no longer supplied to the seal plate operating mechanism 132b, the seal plate 131b is pushed out of the seal plate operating mechanism 132b and moves toward the steel plate S as shown in FIG.

  The molten metal recovery apparatus 140 includes a recovery guide plate 141, a rotation mechanism 142, a recovery tank 143, a moving roller 144, a roller operating mechanism 145, and a discharge system 146. In addition, a roller 147 is attached in the introduction chamber 120 and in the vicinity immediately below the channel 112.

  The collection guide plate 141 is a bowl-shaped plate, the upper end of which is rotatably supported by a rotation mechanism 142, and the end of which is provided with a roller 141a. The width of the collection guide plate 141 (the length in the direction perpendicular to the paper surface in FIGS. 1 and 2) is wider than the width of the channel 112 (the length in the direction perpendicular to the paper surface in FIGS. 1 and 2).

  The rotation mechanism 142 rotatably supports the upper end of the collection guide plate 141 and moves the collection guide plate 141 away from the position directly below the channel 112 during normal operation (when no power failure occurs). A mechanism for turning the collection guide plate 141 is incorporated so that the collection guide plate 141 is retracted and disposed obliquely at a position directly below the channel 112 in the event of a power failure.

  Specifically, the rotation mechanism 142 includes a collection guide plate 141, a mechanical rotation mechanism (for example, a spring mechanism) that urges the collection guide plate 141 counterclockwise in FIGS. 1 and 2, an electrical rotation mechanism (for example, an electromagnet) that urges clockwise is provided. In addition, the turning power by the electrical operation mechanism is set larger than the turning power by the mechanical operation mechanism.

  Therefore, when electricity is supplied to the rotation mechanism 142, the collection guide plate 141 is rotated in the clockwise direction and set at a position retracted from the position directly below the channel 112, as shown in FIG. On the other hand, when electricity is no longer supplied to the rotation mechanism 142, the collection guide plate 141 rotates counterclockwise and is disposed obliquely at a position directly below the channel 112 as shown in FIG.

  The moving roller 144 is rotatably supported by the slide plate 144a. The slide plate 144a is slidable in the horizontal direction by a slide mechanism (not shown).

  The roller operating mechanism 145 has an electrical pulling mechanism (for example, an electromagnet) and a mechanical pushing mechanism (for example, a spring mechanism). When electricity is supplied, the electrical pulling mechanism pulls the slide plate 144a toward the roller operating mechanism 145, and the mechanical pushing mechanism urges the slide plate 144a to be pushed out of the roller operating mechanism 145. Moreover, the electrical tensile force is set to be larger than the mechanical pushing force.

  Therefore, when electricity is supplied to the roller operating mechanism 145, the slide plate 144a and the moving roller 144 are pulled toward the roller operating mechanism 145 as shown in FIG. On the other hand, when electricity is not supplied to the roller operating mechanism 145, the slide plate 144a and the moving roller 144 are pushed out of the roller operating mechanism 145 as shown in FIG.

  The collection tank 143 is arranged in the downstream space 120a. As shown in FIG. 2, when the collection guide plate 141 is arranged obliquely immediately below the channel 112, the lower end of the collection guide plate 141 is collected. It arrange | positions so that it may be located above the tank 143.

  The discharge system 146 communicates with the collection tank 143 and has a discharge valve 146a.

During normal operation, that is, when electricity is supplied to the electromagnetic force generator 113, the seal plate operating mechanisms 132a and 132b, the rotating mechanism 142, and the roller operating mechanism 145, the state shown in FIG.
That means
(1) The Lorentz force (electromagnetic force) generated from the electromagnetic force generator 113 prevents the molten metal M from flowing out of the channel 112,
(2) The seal plates 131a and 131b are pulled by the seal plate operating mechanisms 132a and 132b, and the seal plates 131a and 131b are separated from each other.
(3) The collection guide plate 141 is rotated clockwise by the rotation mechanism 142, and the collection guide plate 141 is retracted to a position away from a position directly below the channel 112,
(4) The moving roller 144 is pulled by the roller operating mechanism 145.

  For this reason, the steel sheet S annealed in the annealing furnace and sent through the introduction passage 121 is pulled upward through the deflector roll 122, guided by the moving roller 144 and the roller 141a, and penetrates the channel 112. It moves in the main body container 111 from below to above. When the steel plate S passes through the main body container 111, the molten metal M stored in the main body container 111 adheres to the surface of the steel plate S. And when the steel plate S moves upward from the liquid level of the molten metal M, the air ejected from the air nozzle 114 removes the excess molten metal M adhering to the surface of the steel plate S. A coating layer made of molten metal M can be formed (plated) on the surface of the steel sheet S.

On the other hand, when power is not supplied to the electromagnetic force generator 113, the seal plate operating mechanisms 132a and 132b, the rotating mechanism 142, and the roller operating mechanism 145 at the time of a power failure, the state shown in FIGS.
That means
(11) The Lorentz force (electromagnetic force) is not generated from the electromagnetic force generator 113, and the molten metal M flows out of the channel 112,
(12) The seal plates 131a and 131b are pushed out by the seal plate operating mechanisms 132a and 132b, the seal plates 131a and 131b sandwich the steel plate S, and the inside of the introduction chamber 120 is upstream of the downstream space 120a and the upstream by the seal plates 131a and 131b. Partitioned into a side space 120b,
(13) The collection guide plate 141 is rotated counterclockwise by the rotation mechanism 142, and the collection guide plate 141 is disposed obliquely at a position directly below the channel 112.
(14) The moving roller 144 is pushed out by the roller operating mechanism 145.
(15) Furthermore, the transport movement of the steel sheet S is stopped.

  Therefore, at the time of a power failure, the molten metal M stored in the main body container 111 flows downward through the channel 112. The molten metal M that has flowed out in this way is guided by the recovery guide plate 141 and flows obliquely downward, and then flows down into the recovery tank 143 and is recovered. The molten metal M recovered in the recovery tank 143 is discharged through the discharge system 146 by opening the valve 146a.

Even if a power failure occurs in this way and the molten metal M flows downward through the channel 112, the molten metal M that has flowed out is recovered by the molten metal recovery device 140, so that the molten metal M that has flowed out is deflected by the deflector roll 122. It won't take on.
For this reason, the defect that the molten metal M is applied to the deflector roll 122 and solidifies does not occur. When the power failure is resolved, the replacement work of the deflector roll 122 is unnecessary, and the operation is resumed quickly and easily. can do.
That is, even if the molten metal M flows out, maintenance related to the molten metal leakage becomes unnecessary.

Further, when a power failure occurs, the seal plates 131a and 131b are pushed out by the seal plate operating mechanisms 132a and 132b, the seal plates 131a and 131b sandwich the steel plate S, and the inside of the introduction chamber 120 is downstream by the seal plates 131a and 131b. It is partitioned into a space 120a and an upstream space 120b.
For this reason, after all the molten metal M in the container body 111 has flowed out, the atmosphere flows into the downstream space 120a of the introduction chamber 120 via the channel 112, but the upstream space 120b. Will not flow into the side.

  Therefore, among the steel sheets S whose conveyance is stopped due to a power failure, those in the downstream space 120a are exposed to the atmosphere and oxidized by oxygen in the atmosphere to become defective products, but the upstream side where the deflector roll 122 is disposed. The atmosphere does not enter the upstream side of the space 120b, and the quality of the steel sheet S existing on the upstream side of the upstream space 120b can be maintained without being exposed to the atmosphere.

  For this reason, even if air flows into the introduction chamber 120, the amount (length) of damage to the steel sheet S is limited, and damage can be minimized.

Next, a hot dipping equipment 100A according to Example 2 of the present invention will be described with reference to FIGS.
In the first embodiment, the seal plate operation mechanisms 132a and 132b, the rotation mechanism 142, and the roller operation mechanism 145 are configured by an electric mechanism (for example, an electromagnet) and a mechanical mechanism (for example, a spring mechanism), respectively. In the second embodiment, as will be described later, a mechanism using an air cylinder and a counterweight is employed as each operating mechanism.

FIG. 4 shows a state when normal operation is performed, and FIG. 5 shows a state when a power failure occurs.
For easy understanding, each operation mechanism is not shown in FIGS. 4 and 5, and each operation mechanism is extracted and shown in FIG. 6.

  As shown in FIGS. 4 to 6, a hot dipping apparatus 100 </ b> A according to the second embodiment is provided in a hot dipping apparatus 110, an introduction chamber 120 disposed below the hot dipping apparatus 110, and the introduction chamber 120. The atmosphere blocking device 130 </ b> A and the molten metal recovery device 140 </ b> A disposed in the introduction chamber 120.

  A molten metal (molten zinc) M is stored in the main body container 111 of the hot dipping apparatus 110. A channel 112 through which the steel sheet S passes from below to above is formed on the bottom surface of the main body container 111. The electromagnetic force generator 113 is disposed with the channel 112 interposed therebetween. A pair of air nozzles 114 is disposed above the main body container 111 with the steel plate S interposed therebetween.

The electromagnetic force generator 113 includes a two-pole magnetic field generator 113a in which a coil is wound around a core having two yokes, and a two-pole magnetic field generator 113b in which a coil is wound around a core having two yokes. The magnetic field generators 113a and 113b are arranged with the channel 112 interposed therebetween. A commercial current (current having a frequency of 50 Hz or 60 Hz) is supplied to each of the magnetic field generators 113a and 113b.
The Lorentz force (electromagnetic force) is generated by the alternating magnetic flux generated from the magnetic field generators 113 a and 113 b of the electromagnetic force generator 113, and the molten metal M is prevented from flowing downward through the channel 112 due to the electromagnetic force. is doing.

  An introduction chamber 120 is disposed below the hot dipping apparatus 110, and an introduction passage 121 communicates with the introduction chamber 120. A deflector roll 122 is disposed in the introduction chamber 120.

  The internal spaces of the introduction chamber 120 and the introduction passage 121 that are sealed are filled with a non-oxidizing or reducing gas and maintained in an inert atmosphere state. The introduction passage 121 is connected to an annealing furnace maintained in an inert atmosphere state. Thus, by making the internal space of the introduction chamber 120 and the introduction passage 121 into an inert space, the steel plate S being conveyed is prevented from being oxidized.

  The atmosphere blocking device 130 </ b> A is disposed in the introduction chamber 120. Further, the arrangement position will be described in detail. The atmosphere blocking device 130A extends along the conveying direction of the steel sheet S, downstream of the deflector roll 122 and upstream of the channel 112, in other words, the introduction chamber 120 in the downstream space 120a. And the upstream space 120b.

  The atmosphere blocking device 130A includes seal plates 131a and 131b (see FIGS. 4 and 5) and seal plate operating mechanisms 135 and 136 (see FIG. 6).

  The seal plates 131a and 131b are arranged in a state of being opposed to each other with the steel plate S interposed therebetween, and the seal plates 131a and 131b can be moved toward and away from each other within a horizontal plane (in FIG. 4 and FIG. 5, they can move in the left-right direction). Is arranged). The seal plates 131a and 131b are made of, for example, ceramic fibers.

  The seal plate operating mechanism 135 includes a pulley 135a, a rope 135b wound around the pulley 135a, a counterweight 135c connected to one end of the rope 135b, and a piston P connected to the other end of the rope 135b. 135d, an air pipe 135e for supplying compressed air from a compressed air source (not shown) to the air cylinder 135d, an electromagnetic valve 135f interposed in the air pipe 135e, and a connecting member for flexibly connecting the pulley 135a and the seal plate 131a 135g.

When the current is supplied, the solenoid valve 135f is opened, whereby compressed air is supplied to the air cylinder 135d. Thereby, the air cylinder 135d pulls the rope 135b. The pulling force of the air cylinder 135d is set larger than the pulling force due to the weight of the counterweight 135c.
Further, the solenoid valve 135f is closed when no current is supplied, whereby the compressed air is not supplied to the air cylinder 135d, and the air cylinder 135d does not exert a force for pulling the rope 135b.

  Therefore, when electricity is supplied to the electromagnetic valve 135f of the seal plate operating mechanism 135, the air cylinder 135d pulls the rope 135b, and the pulley 135a rotates in the α direction to pull the connecting member 135g. As a result, the seal plate 131a is pulled to the seal plate operating mechanism 135 side and is at a position away from the steel plate S as shown in FIG.

  On the other hand, when electricity is not supplied to the electromagnetic valve 135f of the seal plate operating mechanism 135 due to a power failure, the counterweight 135c pulls the rope 135b, and the pulley 135a rotates in the β direction to push out the connecting member 135g. As a result, the seal plate 131a is pushed out of the seal plate operating mechanism 135 and moves toward the steel plate S as shown in FIG.

  Similarly, the seal plate operating mechanism 136 includes a pulley 136a, a rope 136b wound around the pulley 136a, a counterweight 136c connected to one end of the rope 136b, and a piston P connected to the other end of the rope 136b. The air cylinder 136d, the air pipe 136e for supplying compressed air from a compressed air source (not shown) to the air cylinder 136d, the electromagnetic valve 136f interposed in the air pipe 136e, the pulley 136a, and the seal plate 131a are flexibly connected. And a connecting member 136g.

When the current is supplied, the solenoid valve 136f is opened, whereby compressed air is supplied to the air cylinder 136d. As a result, the air cylinder 136d pulls the rope 136b. The pulling force of the air cylinder 136d is set larger than the pulling force due to the weight of the counterweight 136c.
The solenoid valve 136f is closed when no current is supplied. As a result, the compressed air is not supplied to the air cylinder 136d, and the air cylinder 136d does not exert a force for pulling the rope 136b.

  Therefore, when electricity is supplied to the electromagnetic valve 136f of the seal plate operating mechanism 136, the air cylinder 136d pulls the rope 136b, and the pulley 136a rotates in the α direction to pull the connecting member 136g. As a result, as shown in FIG. 4, the seal plate 131 b is pulled toward the seal plate operating mechanism 136 and is in a position away from the steel plate S.

  On the other hand, when electricity is not supplied to the electromagnetic valve 136f of the seal plate operating mechanism 136 due to a power failure, the counterweight 136c pulls the rope 136b, and the pulley 136a rotates in the β direction to push out the connecting member 136g. As a result, the seal plate 131b is pushed out of the seal plate operating mechanism 136 and moves toward the steel plate S as shown in FIG.

  The molten metal recovery apparatus 140A includes a recovery guide plate 141, a roller 141a provided at the tip of the recovery guide plate 141, a recovery tank 143, a discharge system 146, a roller 147, a roller 148, as shown in FIGS. , A recovery guide plate moving mechanism 149 as shown in FIG. 6 is provided.

The collection guide plate 141 is a bowl-shaped plate, and its width (the length in the direction perpendicular to the paper surface in FIGS. 4 and 5) is the width of the channel 112 (the length in the direction perpendicular to the paper surface in FIGS. 4 and 5). ) Is wider than.
The collection guide plate 141 can be slid obliquely by a collection guide plate moving mechanism 149.

  The recovery guide plate moving mechanism 149 includes a connection rod 149a connected to the recovery guide plate 141, a slide plate 149b arranged obliquely, an air cylinder 149c having a piston P connected to the upper end side of the connection rod 149a, and An air pipe 149d for supplying compressed air from the compressed air source to the air cylinder 149c, an electromagnetic valve 149e interposed in the air pipe 149d, and a counter that is connected to the lower end of the connecting rod 149a and slides on the slide plate 149b. It is composed of a weight 149f. The air cylinder 149c is disposed on the slide plate 149b.

The electromagnetic valve 149e is opened when a current is supplied, whereby compressed air is supplied to the air cylinder 149c. Thereby, the air cylinder 149c pulls the connecting rod 149a obliquely upward. The pulling force of the air cylinder 149c is set larger than the pulling force due to the weight of the counterweight 149f.
Further, the electromagnetic valve 149e is closed when no current is supplied, whereby the compressed air is not supplied to the air cylinder 149e, and the air cylinder 149c does not exert a force for pulling the connecting rod 149a.

For this reason, when electricity is supplied to the electromagnetic valve 149e of the recovery guide plate moving mechanism 149, the air cylinder 149c pulls the connecting rod 149a diagonally upward, and the recovery guide plate 141 is lifted diagonally upward, as shown in FIG. As described above, the position is set at a position retracted from a position directly below the channel 112.
On the other hand, when power is not supplied to the electromagnetic valve 149e due to a power failure, the counterweight 149f pulls the connecting rod 149a obliquely downward, and the collection guide plate 141 is obliquely lowered downward and is disposed obliquely at a position directly below the channel 112. .

  The collection tank 143 is disposed in the downstream space 120a, and when the collection guide plate 141 is disposed obliquely directly below the channel 112 as shown in FIG. It arrange | positions so that it may be located above the tank 143.

  The discharge system 146 communicates with the collection tank 143 and has a discharge valve 146a.

During normal operation, that is, when electricity is supplied to the electromagnetic force generator 113, the seal plate operating mechanisms 135 and 136, and the recovery guide plate moving mechanism 149, the state shown in FIG.
That means
(1) The Lorentz force (electromagnetic force) generated from the electromagnetic force generator 113 prevents the molten metal M from flowing out of the channel 112,
(2) The seal plates 131a and 131b are pulled by the seal plate operating mechanisms 135 and 136 so that the seal plates 131a and 131b are separated from each other;
(3) The collection guide plate 141 is lifted obliquely upward by the air cylinder 149 c of the collection guide plate moving mechanism 149, and the collection guide plate 141 is retracted to a position away from a position directly below the channel 112.

  For this reason, the steel sheet S annealed in the annealing furnace and sent through the introduction passage 121 is pulled upward through the deflector roll 122, passes through the channel 112, and passes through the main body container 111 from below to above. Moving. When the steel plate S passes through the main body container 111, the molten metal M stored in the main body container 111 adheres to the surface of the steel plate S. And when the steel plate S moves above the liquid level of the molten metal M, the air ejected from the air nozzle 114 removes the excess molten metal M adhering to the surface of the steel plate S. A coating layer made of molten metal M can be formed (plated) on the surface of the steel sheet S.

On the other hand, when electricity is not supplied to the electromagnetic force generator 113, the seal plate operating mechanisms 135 and 136, and the recovery guide plate moving mechanism 149 at the time of a power failure, the state shown in FIG.
That means
(11) The Lorentz force (electromagnetic force) is not generated from the electromagnetic force generator 113, and the molten metal M flows out of the channel 112,
(12) The seal plates 131a and 131b are pushed out by the seal plate operating mechanisms 135 and 136, and the seal plates 131a and 131b sandwich the steel plate S. The inside of the introduction chamber 120 and the downstream space 120a and the upstream are sealed by the seal plates 131a and 131b. Partitioned into a side space 120b,
(13) The collection guide plate 141 is pulled obliquely downward by the counterweight 149f of the collection guide plate moving mechanism 149, and the collection guide plate 141 is arranged obliquely at a position directly below the channel 112,
(14) Furthermore, the transfer movement of the steel sheet S is stopped.

  Therefore, at the time of a power failure, the molten metal M stored in the main body container 111 flows downward through the channel 112. The molten metal M that has flowed out in this way is guided by the recovery guide plate 141 and flows obliquely downward, and then flows down into the recovery tank 143 and is recovered. The molten metal M recovered in the recovery tank 143 is discharged through the discharge system 146 by opening the valve 146a.

Even if a power failure occurs in this manner and the molten metal M flows downward through the channel 112, the molten metal M that has flowed out is recovered by the molten metal recovery device 140A. It won't take on.
For this reason, the defect that the molten metal M is applied to the deflector roll 122 and solidifies does not occur. When the power failure is resolved, the replacement work of the deflector roll 122 is unnecessary, and the operation is resumed quickly and easily. can do.
That is, even if the molten metal M flows out, maintenance related to the molten metal leakage becomes unnecessary.

Further, when a power failure occurs, the seal plates 131a and 131b are pushed out by the seal plate operating mechanisms 135 and 136, the steel plates S are sandwiched between the seal plates 131a and 131b, and the inside of the introduction chamber 120 is downstream by the seal plates 131a and 131b. It is partitioned into a space 120a and an upstream space 120b.
For this reason, after all the molten metal M in the container body 111 has flowed out, the atmosphere flows into the downstream space 120a of the introduction chamber 120 via the channel 112, but the upstream space 120b. Will not flow into the side.

  Therefore, among the steel sheets S whose conveyance is stopped due to a power failure, those in the downstream space 120a are exposed to the atmosphere and oxidized by oxygen in the atmosphere to become defective products, but the upstream side where the deflector roll 122 is disposed. The atmosphere does not enter the upstream side of the space 120b, and the quality of the steel sheet S existing on the upstream side of the upstream space 120b can be maintained without being exposed to the atmosphere.

  For this reason, even if air flows into the introduction chamber 120, the amount (length) of damage to the steel sheet S is limited, and damage can be minimized.

BRIEF DESCRIPTION OF THE DRAWINGS The block diagram which shows the hot dipping equipment which concerns on Example 1 of this invention. BRIEF DESCRIPTION OF THE DRAWINGS The block diagram which shows the hot dipping equipment which concerns on Example 1 of this invention. The fracture | rupture perspective view which shows the hot dipping equipment which concerns on Example 1 of this invention. The lineblock diagram showing the hot dipping equipment concerning Example 2 of the present invention. The lineblock diagram showing the hot dipping equipment concerning Example 2 of the present invention. The fracture | rupture perspective view which shows the hot dipping equipment which concerns on Example 2 of this invention. The block diagram which shows the conventional hot dipping equipment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100,100A Hot dipping equipment 110 Hot dipping apparatus 120 Introduction chamber 122 Deflector roll 130,130A Atmosphere blocker 140,140A Molten metal recovery apparatus S Steel plate M Molten metal

Claims (3)

A main body container for storing molten metal, a channel formed on the bottom surface of the main body container, and an electromagnetic force that is disposed in a state of sandwiching the channel and generates an electromagnetic force that prevents the molten metal from flowing out through the channel. A hot dipping apparatus having a generator;
An introduction chamber that is disposed on the lower side of the hot dipping apparatus and in which an internal space is defined as an inert space, and a steel plate is introduced into the channel via the deflector roll,
In hot dipping equipment equipped with
An atmosphere blocking device is disposed between the deflector roll and the channel;
The atmosphere blocking device is:
A pair of seal plates that are arranged opposite to each other with the steel plate in between and are capable of moving toward and away from the steel plate,
When electricity is supplied to the electromagnetic force generating device, the seal plates are separated from each other, and when the electric supply to the electromagnetic force generating device is stopped, the seal plates are brought close to each other to bring the steel plate into the seal plate And a sealing plate operating mechanism for moving the sealing plate so as to divide the introduction chamber into a downstream space and an upstream space with respect to the sealing plate.   The seal plate operating mechanism includes an electrical mechanism that applies a force to the pair of seal plates so as to separate the seal plates from each other when electricity is supplied, and a pair of the seal plates that are close to each other. And a mechanical mechanism for applying a force to the seal plate, and the force of the electrical mechanism is set larger than the force of the mechanical mechanism.   The hot dip plating facility, wherein the seal plate is formed of a ceramic fiber.

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