JPS6261874B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for attaching and detaching a cover to a bucket stored in a preheating chamber.

When operating a melting furnace, for example an electric furnace, a method is adopted in which the exhaust gas from the electric furnace is led into a preheating chamber to preheat raw material scrap stored in a bucket. When the lead hood is moved and the bucket is transported to the electric furnace using a crane, etc., impurities in the scrap generate white smoke due to heating and are released into the factory.
There are problems such as impairing environmental hygiene and having an adverse effect on crane operators who transport the buckets, especially at high places.

For this reason, attempts have been made to use a crane or the like to put a cover on the bucket before transporting it, but this method requires two crane operations, which is complicated, and it is also difficult to put a cover on the bucket that generates white smoke. This process requires a lot of effort, and at present, the above-mentioned problems have not been satisfactorily solved.

SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to allow a cover to be attached to and removed from a bucket in conjunction with the raising and lowering of a hood that conducts high-temperature waste heat from an electric furnace relative to the bucket.

The present invention will be described below based on embodiments shown in the drawings.

The figure shows a pair of preheating chambers 1a and 1b (hereinafter collectively referred to as 1), a bucket 2a, and a bucket 2a, respectively.
2b (hereinafter simply referred to as 2) and heated alternately.Each bucket 2 is equipped with a pair of opening/closing lids 3 for inserting scraps at the bottom, and a preheating chamber 1 A gasket 4 for airtight maintenance is provided on the upper opening edge of the bucket 2, and a collar 5 that comes into contact with the gasket 4 is provided on the outer periphery of the intermediate portion of the bucket bag 2.

Hoods 6a and 6b for guiding high-temperature exhaust gas from an electric furnace (not shown) are installed on the top of each of the buckets 2a and 2b, and the respective hoods 6a and 6b are raised and lowered by lifting devices 7a and 7b. At the same time, in order to facilitate lifting by a bucket using a crane, the preheating chamber 1 is supported so as to be pivotable laterally, or the preheating chamber 1 itself can be moved back and forth laterally. The figure shows a structure in which the preheating chambers 1a and 1b are moved in the left and right direction, and the running wheels 8a and 8b are respectively moved.
It is also equipped with an appropriate driving means (not shown) and is driven back and forth for a predetermined distance along the rails 9a and 9b. In addition, each preheating chamber 1a, 1b is connected with a branch discharge pipe 10a, 10b, which can be attached or detached when the preheating chamber is running.
a, 11b, connected to the main exhaust pipe 12, guided to a dust collector (not shown) by a suction fan 13, and after dust removal, the gas is released into the atmosphere.

20 is a cover support mechanism for each of the buckets 2a and 2b provided between the preheating chambers 1a and 1b, and includes a main shaft 21, an arm 22 attached to the lower end of the main shaft 21, a rotating device 23, and a lifting device. 24, and the arm 22 has a flange 26 for supporting the cover 25 along the vertical short axis 2.
7, and the cover 25 is provided with a locking/detaching mechanism 28 to which the support flange 26 is removably locked. configured.

The main shaft 21 of the cover support mechanism 20 is fitted into a fixed cylinder 31 attached at a proper position, and the rotating device 23 is a driven shaft having a pin 33 fitted into a long groove 32 carved in the main shaft 21. Sprocket 34
The lifting device 24 is composed of a drive sprocket 36 connected to a drive motor 35 and a chain 37 suspended between both sprockets 34 and 36. The motor cylinder is connected to the upper end of the main shaft 21. The rotating device 23 is operated in conjunction with the raising and lowering of the hoods 6a and 6b, and although the hood can be freely rotated in the raised position, the rotating device 23 is not activated when the hood is lowered. Appropriate safety means are provided to open the electrical circuit and prevent rotation.

The engaging/disengaging mechanism 28 is comprised of a seat 50 having an inverted U-shaped cross section that covers the support flange 26, and a positioning ring 51 mounted within the seat 50. The positioning ring 51 has a size that accommodates the support flange 26, and the support flange 26 is located between the lower surface of the positioning ring 51 and the upper surface of the cover 25.
A gap 52 is provided to allow the passage of. When the support flange 26 is located in the gap 52, the support flange 26 and the vertical short axis are attached to the catch seat 50 and the positioning ring 51 as the arm 22 rotates relative to the cover 25 located on the bucket bag 2. 27
A notch 53 is provided to allow the passage of. However, when the support flange 26 is located within the positioning ring 51, that is, when the cover 25 is suspended, the support flange 26 is held by the positioning ring 51 and is prevented from coming off.

Next, its effect will be explained.

The buckets 2a and 2b are stored in the preheating chambers 1a and 1b, and when heating the raw material scrap in the bucket, a lifting hood 6b is placed over the bucket 2b as shown in the bucket 2b, and the scrap is discharged from the electric furnace by the operation of the suction fan 13. The high-temperature exhaust gas is passed through the hood 6b into the bucket 2b and heats the raw material scrap inside the bucket 2b.

Next, when the scraps are put into the electric furnace, the hood 6a is pulled up by the lifting device 7a as shown on the side of the preheating chamber 1a.

A cover 25 is supported in advance on the arm 22 of the cover support mechanism 20, and as the hood 6a rises, the cover 25 stops rotating above the bucket 2a, and is lowered to place the cover 25 on the bucket 2a.
Further, the arm 22 is lowered slightly, and the supporting flange 26 is removed from the positioning ring 51 and positioned in the gap 52. As a result, the arm 22 can be rotated, and the supporting flange 26 and the vertical short shaft 27 can be extracted outwardly from the notch 53. Then, the covered bucket cart is moved to the electric furnace side, the preheated scrap is charged into the electric furnace, and then returned to the regular position, and the cover is removed in the reverse manner as described above.

As described above, according to the present invention, since the cover is attached to and detached from the bucket using the cover support mechanism, remote operation is easy, and the operation can be performed in conjunction with the raising and lowering of the hood. It is possible to slightly suppress the generation of white smoke odor from the bucket, which is extremely effective in terms of environmental hygiene.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the present invention, and FIG. 1 is an overall front view with a part of it being a longitudinal sectional view, FIG. 2 is a longitudinal sectional view of the main part, and FIG. 3 is a plan view of the cover. . 1a, 1b...Preheating chamber, 2a, 2b...Bucket, 6a, 6b...Hood, 20...Cover support mechanism, 21...Main shaft, 22...Arm, 23...
Rotating device, 24... Lifting device, 25... Cover,
26... Support flange, 28... Engagement/disengagement mechanism, 5
0...Catch, 53...Notch.

Claims (1)

[Claims] 1 The main components are a support mechanism for a cover that covers the upper opening of the bucket stored in the preheating chamber, and a locking/disengaging mechanism attached to the cover, and the cover support mechanism has a main shaft equipped with a lifting and rotating device and a main shaft attached to the main shaft. and an arm provided with a flange for supporting the cover, and the engaging/disengaging mechanism is provided with a catch that engages with the support flange, and the catch allows the support flange to be attached and detached by rotation of the arm. A cover attachment/detachment device for a bucket in a preheating chamber, characterized in that it is provided with a permissible notch.