JPH073279Y2 - Scrap preheater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Purpose of Invention] Industrial field of application The present invention relates to a scrap preheating device for preheating scrap by exhaust gas from an electric furnace or the like for melting a copper material or the like.

2. Description of the Related Art Conventionally, as shown in FIG. 5, as such a scrap preheating device, an electric power is provided at a central portion of a preheating hood d that is hermetically capped with a preheating container body b having an exhaust port a at the bottom and an input port c at the top. A duct e to be connected to a furnace is connected, and a bellows-shaped expandable seal expansion f made of cloth having heat resistance (about 300 degrees) is detachably attached to the lower part of the preheating hood d. The seal expansion f
A ring-shaped sealing body g fixed to the lower portion is used to preheat the container b.
Although the upper edge of the bucket h for containing the scrap contained therein is sealed and exhaust gas of the electric furnace is fed into the bucket h through the duct e to preheat the scrap, such a preheating device is used. High temperature (around 1000 degrees)
Since the exhaust gas directly hits the seal expansion f, the service life is usually extremely short, about 1 month. Moreover, when the seal expansion f is replaced, the worker is forced to have an upward posture and the preheating hood d Had a drawback that it was extremely dark and that dust contained in the exhaust gas adhered to the preheating hood d, the seal expansion f, etc., and had to be operated in a bad environment.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present invention arranges the first and third seal bodies on the outside to reduce the influence of exhaust gas to prolong the life, improve the working environment at the time of replacement, and improve workability. It is intended to provide an improved scrap preheating device.

[Constitution of device]

Means for Solving the Problems In view of the problems such as durability, workability, and working environment based on the above-mentioned conventional technique, the present invention arranges the first and third seal bodies outside the preheating container body to prevent exhaust gas from being emitted. The scrap preheating device is provided to reduce the influence and to attach / detach the first and third seal bodies horizontally from the outer lateral direction to improve the work environment and workability, thereby eliminating the above-mentioned drawbacks. It is a spoiler.

As a scrap preheating device, a first seal body is detachably mounted between a lower end of an exhaust duct connected to an electric furnace or the like and an upper end of a hood body, and a passage hole through which the hood body passes is formed. Along with the outer peripheral edge, a cover body upper surface that vertically extends a peripheral wall portion that is inserted into the watertight groove on the outer periphery of the preheating container body,
A third seal body is detachably mounted between the lower surface of the flange projecting outward from the hood body, and the upper end of the bucket, which is housed in the preheating container body and contains scrap, is sealed at the lower end of the hood body. One for fixing the seal body, and one for arranging the first shielding wall inside the first seal body.

In the present invention, the peripheral wall of the cover body is inserted into the watertight groove to seal the preheating container body, and the bucket is sealed with the second seal body of the hood body to prevent exhaust gas from the electric furnace or the like. The scrap is heated by being fed into the bucket through the exhaust duct.

Further, by disposing the first shield wall inside the first seal body, the exhaust gas is shielded by the first shield wall so as not to come into direct contact with the first seal body.

Further, since the first seal body and the third seal body are disposed outside the preheating container body, they are attached and detached horizontally from the lateral direction for replacement.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. 1 is a scrap preheating device according to the present invention, and the scrap preheating device 1 is an exhaust duct 2 connected to an electric furnace or the like (not shown). And a preheating hood 3 connected to the preheating hood 3.
The preheating container 4 is hermetically capped by the above.

Reference numeral 5 denotes an annular body that constitutes the preheating hood 3.
Forms a through hole 6 in the central portion of the disk-shaped member, and vertically extends a first shield wall 7 continuously downward from the peripheral edge of the through hole 6. The outer peripheral side of the ring-shaped body 5 and the outer peripheral side thereof. And an upper end of a bellows-like expandable and contractible first seal body 8 made of cloth or the like having heat resistance (about 300 degrees) formed with corresponding inner and outer diameters, and an appropriate fastening member (not shown) At the lower end of the exhaust duct 2 and inside the first seal body 8, a first shielding wall 7 is disposed in close proximity and is detachably attached.

Further, the upper end of a cone-shaped hood body 9 made of metal is detachably attached to the lower end of the first seal body 8 by an appropriate fastening member, and the preheat container 4 is attached to the lower end of the hood body 9. And a ring-shaped second seal body 11 made of metal to be sealed at the upper end of a bucket 10 having an exhaust port (not shown) at an appropriate position while being opened upward to store scrap such as steel. Is fixed.

Further, the flange 12 is horizontally projected outward from the intermediate portion of the outer periphery of the hood body 9, and the bellows-like stretchable first member made of cloth or the like having heat resistance (about 300 degrees) is formed on the lower surface of the intermediate portion of the flange 12. The upper end of the three seal body 13 is integrally and removably mounted by an appropriate fastening member.

Further, at the lower end of the third seal body 13, a passage hole 14 is formed in the central portion of the disk-shaped member with an inner diameter that allows the passage of the hood body 9, and the peripheral wall portion 15 is continuously downward from the outer peripheral edge. To form a cylindrical lid-shaped cover body 16, and a supporting leg portion 17 is provided upright on the upper surface of the peripheral edge of the passage hole 14 of the cover body 16, and the supporting leg portion 17 is provided.
The lower end of the third seal body (13) is integrally and removably attached to the upper portion by an appropriate fastening member.

In the figure, 18 is a second shield wall vertically provided close to the inside of the third seal body 13, 19 is a chain connecting the cover body 16 and the hood body 9, and 20 is the lower surface of the flange 12 on the tip side. Fixed to
It is a stopper that comes into contact with the support leg portion 17.

The material of the first seal body 8 and the third seal body 13 is not limited to cloth, and may be metal, for example.

The preheating container body 4 is formed in the shape of a box with a bottom, and the upper part is a charging port.
A watertight groove 22 for accommodating a liquid such as water in the outer peripheral portion of the input port 21 and into which the peripheral wall portion 15 of the cover body 16 is inserted.
And an exhaust port 23 for discharging exhaust gas from the inside of the preheating container 4 to the outside.

Reference numeral 24 denotes a carriage, and the carriage 24 is movable on levers 25 and 25a arranged in a pair on the side of the preheating container 4, and a drive motor 26 is mounted on the carriage 24. The preheating hood 3 is controlled to move up and down through a connecting member 27 such as a chain.

Next, the operation of the scrap preheating device according to the present invention will be described. First, the drive motor 26 provided on the truck 24 is operated to raise the preheating hood 3 via the connecting member 27, and then the truck 24 is moved to the other side. After opening the inlet 21 of the preheating container body 4,
The bucket 10 containing the scrap is accommodated in the preheating container body 4, the carriage 24 is moved above the preheating container body 4, and the drive motor 26 is operated to lower the preheating hood 3 to lower the cover body 16. The peripheral wall portion 15 is inserted into the watertight groove 22 in which a liquid such as water is stored and hermetically sealed, and the upper end of the bucket 10 is hermetically sealed by the second seal body 11 attached to the lower end of the hood body 9.

Next, the exhaust gas from the electric furnace or the like is fed into the bucket 10 through the exhaust duct 2 to raise the temperature of the scrap in the bucket 10, and then exhaust the exhaust gas through the exhaust port 23 of the preheating container body 4. The gas is sent to a dust collector (not shown) or the like.

In this state, by disposing the first shield wall 7 inside the first seal body 8, the exhaust gas is shielded by the first shield wall 7 to form the first seal body 8. Avoid direct contact.

Further, when replacing the first seal body 8 and the third seal body 13, first, the first seal body 8 is mounted between the lower end of the exhaust duct 2 and the upper end of the hood body 9, and therefore, the fastening member. Is removed from the outer side in the horizontal direction for replacement and the third seal body 13 is also detached from the fastening member to allow the hood body 9 to pass through the passage hole 14 of the cover body 16. Then, it is raised to a proper position, and thereafter, like the first seal body 8, it is horizontally attached and detached from the outside in the lateral direction for replacement.

[Effect of device]

In short, the present invention is an exhaust duct 2 connected to an electric furnace or the like.
The first seal body 8 is detachably mounted between the lower end and the upper end of the hood body 9, and a passage hole 14 through which the hood body 9 passes is formed and a watertight groove around the outer periphery of the preheating container body 4 is formed. twenty two
An upper surface of the cover body 16 that vertically extends the peripheral wall portion 15 inserted therein,
A third seal body 13 is detachably mounted between the hood body 9 and a lower surface of a flange 12 that protrudes outward, and a lower end of the hood body 9 is housed in a preheating container 4 and a bucket 10 for housing scraps is housed. Since the second seal body 11 to be sealed is fixed, the first seal body 8 and the third seal body 13 should be provided outside instead of inside the preheating container body 4 as in the conventional case. This reduces the effect of heat from exhaust gas to prevent thermal deterioration and prolongs the service life of the product.
Even when replacing, since it can be attached and detached horizontally from the outside laterally and replaced, it is possible for the worker to work without facing up like the conventional way and work without dust adhesion, therefore The work environment at the time of replacement can be improved and workability can be improved.

Further, since the first shielding wall 7 is arranged inside the first sealing body 8, the exhaust gas is shielded by the first shielding wall 7 so as not to come into direct contact with the first sealing body 8. As a result, even in the case of the first seal body 8 made of cloth, the useful life of the first seal body 8 can be remarkably extended in combination with the above-mentioned effect, which is a great practical effect.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a partially cutaway front view of a scrap preheating device according to the present invention, FIG. 2 is a partial sectional view of the same preheating hood, and FIG. FIG. 4 is a partial cross-sectional view of another embodiment, FIG. 4 is a schematic side view of a scrap preheating device, and FIG. 5 is a partial cross-sectional view showing a conventional example of the scrap preheating device. 2 exhaust duct, 4 preheating container body 7 first shielding wall, 8 first seal body 9 hood body, 10 bucket 11 second seal body, 12 flange 13 third seal body, 14 passage hole 15 peripheral wall portion, 16 cover body 22 Watertight groove

Claims (2)

[Scope of utility model registration request] 1. A lower end of an exhaust duct connected to an electric furnace or the like,
The first seal body is detachably attached to the upper end of the hood body, and a passage hole through which the hood body passes is formed, and a peripheral wall portion to be inserted into the watertight groove on the outer circumference of the preheating container body is formed on the outer peripheral edge. A third seal body is removably mounted between the upper surface of the vertically extending cover body and the lower surface of the flange projecting outward from the hood body, and the lower end of the hood body is accommodated in the preheating container body and accommodates scrap. A scrap preheating device, characterized in that a second seal body for sealing the upper end of the bucket is fixed. 2. The scrap preheating device according to claim 1, wherein a first shielding wall is provided inside the first seal body.