JP3785631B2 - Melting furnace lid lifting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a furnace raising / lowering device for a melting furnace. When melting metal scrap in a melting furnace comprising a furnace body and a furnace lid attached to the furnace body, charging the raw material metal scrap into the furnace, discharging the molten metal from the furnace body, checking the furnace, When repairing, etc., open and close the furnace lid appropriately. The opening and closing of the furnace lid is performed by raising and lowering the furnace lid, and the present invention relates to improvement of an apparatus used for raising and lowering the furnace lid.
[0002]
[Prior art]
Conventionally, as a furnace lid elevating device for a melting furnace, an apparatus in which a furnace lid and an elevating swirler are connected by an arm has been used (Japanese Patent Publication No. 6-46145). This conventional apparatus raises the furnace lid through an arm by an elevating swirler disposed on the furnace body side of the melting furnace, and further opens the furnace lid by swiveling, and also opens the furnace lid through the arm by an elevating swirler. The furnace cover is closed by turning and further lowering. However, such a conventional apparatus has a problem that when the furnace lid is raised or lowered, the furnace lid is displaced or tilted, so that the furnace lid and the furnace main body partially collide, and the colliding portion is damaged. As melting furnaces become larger as in recent years, and the furnace lids are correspondingly rich in weight, and especially when the furnace lid is equipped with a shaft-type furnace top preheating device, such furnace lids are used. Due to the unreasonable mechanism of supporting the lifting swivel placed on the furnace body side through the arm, deformation and damage of the collision part due to partial collision between the furnace lid and the furnace body often occur. is there.
[0003]
[Problems to be solved by the invention]
The problem to be solved by the present invention is that, in the conventional apparatus, the collision part is often deformed or damaged due to the collision between the furnace lid and the furnace body.
[0004]
[Means for Solving the Problems]
The present invention for solving the above-described problems is an apparatus for raising and lowering a furnace lid attached to a furnace body of a melting furnace, and a rail guided carriage movably disposed above the furnace lid, and the carriage A support frame installed on the support frame; a pair of take-up drums mounted on the support frame; a wire wound around the take-up drum; an elevating beam suspended at a tip of the wire; A pair of guides attached to the beam and a pair of claw rods rotatably mounted on the elevating beam, and when the elevating beam is raised and lowered, the guide is in sliding contact with an attachment attached to the furnace lid, The present invention relates to a furnace raising / lowering device for a melting furnace, characterized in that the claw of the rod with claw is engaged with the attachment.
[0005]
In the furnace lid lifting apparatus according to the present invention, a rail guided carriage is movably disposed above the furnace lid, a support frame is installed on the carriage, and a pair of winding drums is mounted on the support frame. Is equipped. The support frame is installed on a rail guided carriage and is thus movable with the carriage. The pair of take-up drums is usually rotated forward and reverse by a motor drive. A wire is wound around each of the pair of winding drums, and an elevating beam is suspended from the tip of the wire. In this case, in order to prevent the lifting beam suspended by the wire from swinging, it is preferable to attach a pair of guide rods to the support frame and to penetrate the lifting beam through a guide hole of the guide rod. A pair of guides are attached to the elevating beam, and a pair of pawl rods are rotatably mounted. The pair of guides is usually suspended from the elevating beam and has an inclined surface at the tip. The pair of rods with claws is normally rotated 90 degrees forward and backward by cylinder drive. A pair of attachments are attached to the furnace lid. The pair of attachments is usually formed in a hollow box shape, and an opening for receiving the claw of the claw rod is provided on the upper surface thereof.
[0006]
When the pair of winding drums are reversed by a motor drive and the lifting beam is lowered through the wire, the pair of guides first come into sliding contact with the outer surface of the pair of attachments, and thereby the lifting beam furnace suspended by the wire. The position with respect to the lid is determined, and then the claws of the pair of pawl rods are accommodated in the attachment through the opening on the top surface of the attachment. At this stage, the reverse rotation of the pair of take-up drums driven by the motor is stopped, the descending of the elevating beam is stopped, and the pair of claw rods is rotated 90 degrees forward by the cylinder drive. The attachment is engaged. After this, when the pair of winding drums is rotated forward by a motor drive and the elevating beam is raised via the wire, the furnace lid rises directly above the furnace body via the pair of rods with attachments and attachments, The furnace lid opens. To close the furnace lid, reverse the above procedure.
[0007]
According to the present invention, a furnace lid elevating device is disposed above the furnace lid, thereby raising and lowering the furnace lid on the furnace body side in order to raise the furnace lid directly above the furnace body and lower it directly below. Compared with the conventional apparatus that moves the furnace lid up and down and swivels via the arm by a revolving machine, there is no unreasonable mechanism and it is possible to prevent the collision portion from being deformed or damaged due to the collision between the furnace lid and the furnace body. Furthermore, according to the present invention, when the elevating beam is moved up and down, the pair of guides attached to the elevating beam slide in contact with the attachment attached to the furnace lid to guide the nail of the claw rod to the attachment. An excessive force is not applied to the rod, so that it is possible to prevent the clawed rod from being deformed or broken even when the elevating beam is raised or lowered. Also, when a guide rod is attached to the support frame and a guide hole for the guide rod is provided in the elevating beam, the guide rod can be prevented from being deformed or damaged in the same manner as the claw rod.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a front view partially illustrating a furnace lid lifting apparatus according to the present invention in a longitudinal section, FIGS. 2 and 3 are partially enlarged plan views of FIG. 1, and FIG. 4 is a partially enlarged plan view showing an operation state of FIG. It is. Rail guided carriages 4a and 4b and a support frame 2 are arranged above a furnace lid 1 attached to a furnace body of a melting furnace (not shown). The support frame 2 is formed in a hollow box shape, and is fixed to the carriages 4 a and 4 b guided by the rail 3. Therefore, the support frame 2 is disposed above the furnace lid 1 so as to be movable together with the carriages 4a and 4b.
[0009]
The support frame 2 is equipped with a motor 5, a winch 6 connected to the rotating shaft of the motor 5, and a pair of winding drums 7a, 7b connected to the rotating shaft of the winch 6, and the pair of winding drums 7a, 7b, 7b is rotated forwardly and reversely by driving of the motor 5. Wires 8a and 8b are wound around the pair of winding drums 7a and 7b, respectively, and the wires 8a and 8b are suspended through the bottom opening of the support frame 2, and the elevating beam 9 is suspended at the tip thereof. It has been. A pair of guide rods 10 a and 10 b are suspended from the bottom surface of the support frame 2, and a guide hole 11 a and 11 b for receiving the pair of guide rods 10 a and 10 b is penetratingly provided in the elevating beam 9.
[0010]
A pair of guides 12a and 12b are suspended from the elevating beam 9, and an inclined surface is formed at the tip of the pair of guides 12a and 12b. The elevating beam 9 is equipped with a pair of rods 13a and 13b with claws. The clawed rod 13b has the same configuration as the clawed rod 13a and will not be described. However, the clawed rod 13a is attached to the elevating beam 9 so as to be freely rotatable, and is attached to the tip of the rod 14a. A planar rectangular claw 15a and an extension piece 16a attached to the base end of the rod 14a. On the other hand, another extension piece 17a is attached to the elevating beam 9, and a cylinder 18a is supported on the extension piece 17a, and the tip of the cylinder rod 19a of the cylinder 18a is supported on the tip of the extension piece 16a. Yes. Therefore, the claw rod 13a rotates forward 90 degrees and reverses when the cylinder 18a is driven.
[0011]
A pair of attachments 20 a and 20 b are attached to the upper surface of the furnace lid 1. The pair of attachments 20a and 20b are formed in a hollow box shape, and planar rectangular openings 21a and 21b for receiving the claws 15a and 15b of the claw rods 13a and 13b are provided on the upper surface of the attachments 20a and 20b. An inclined surface is formed.
[0012]
When the pair of winding drums 7a and 7b is reversed by driving the motor 5 and the elevating beam 9 is lowered via the wires 8a and 8b, the pair of guides 12a and 12b is first brought into contact with the outer surfaces of the pair of attachments 20a and 20b. The position of the elevating beam 9 suspended by the wires 8a and 8b relative to the furnace lid 1 is determined by sliding contact, and then the claws 15a and 15b of the pair of rods 13a and 13b with claws pass through the openings 21a and 21b. It is accommodated in 20a, 20b (state of FIG. 3). At this stage, when the drive of the motor 5 is stopped, the descending of the elevating beam 9 is stopped, and the pair of claw rods 13a and 13b are rotated forward by 90 degrees by driving the cylinders 18a and 18b (the cylinder 18b is not shown). Then, the claws 15a and 15b of the pair of rods with claws 13a and 13b engage with the pair of attachments 20a and 20b (state shown in FIG. 4). Thereafter, when the pair of winding drums 7a and 7b is rotated forward by driving the motor 5 and the elevating beam 9 is lifted through the wires 8a and 8b, the pair of rods with claws 13a and 13b and attachments 20a and 20b are moved. Then, the furnace lid 1 rises right above the furnace body, and the furnace lid 1 opens. When closing the furnace lid 1, the reverse operation is performed.
[0013]
【The invention's effect】
As is apparent from the above, the present invention described above has an effect that the furnace lid can be raised and lowered without difficulty in the mechanism, and deformation and breakage due to collision between the furnace lid and the furnace body can be prevented.
[Brief description of the drawings]
FIG. 1 is a front view illustrating a furnace lid lifting device according to the present invention partially in a longitudinal section.
2 is a partially enlarged plan view showing the furnace lid lifting device of FIG. 1. FIG.
3 is a partially enlarged plan view showing the furnace lid lifting device of FIG. 1; FIG.
4 is a partially enlarged plan view showing an operating state of the furnace lid lifting device of FIG. 1. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Furnace lid, 2 ... Support frame, 3 ... Rail, 4a, 4b ... Carriage, 7a, 7b ... Winding drum, 8a, 8b ... Wire, 9 ... Lifting beam, 10a, 10b ... guide rod, 11a, 11b ... guide hole, 12a, 12b ... guide, 13a, 13b ... rod with claw, 15a, 15b ... claw, 20a, 20b ···attachment

Claims (2)

An apparatus for raising and lowering the furnace lid is deposited into the furnace body of the furnace, and carriage movably disposed to the rail induced above the furnace lid, and supporting lifting frame placed on該台vehicle, A pair of take-up drums mounted on the support frame; a wire wound around the take-up drum; a lift beam suspended from the tip of the wire; and a pair of guides attached to the lift beam A pair of claw rods rotatably mounted on the elevating beam, and when the elevating beam moves up and down, the guide is in sliding contact with an attachment attached to the furnace lid, and the claw of the claw rod is attached to the attachment A melting furnace raising and lowering device for a melting furnace, wherein Pair of guide rods to the support frame is mounted, guide bore of the guide rod to the lifting beam according to claim 1 Symbol placement was formed through melting furnace of the furnace lid lifting device.

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