SU1694473A1 - Method and bridge crane for charging cartridges of annealing furnace by elongated articles - Google Patents

Abstract

The invention relates to the field of non-ferrous metallurgy, in particular to methods for loading and unloading chambers of furnaces for electrode production. The purpose of the invention is to increase labor productivity when performing operations when loading and unloading cassettes with long products, provided by maintaining the vertical position of the products and technological gaps between them. The method of loading long items into cassettes involves placing the items vertically on the bottom of the cassette using a lifting device and filling the free volume of the cassette with transfer material initially to a height of not less than 1/3 of the length of the installed products into the cassette to remove the lifting device from the products, and filling the remaining part The free volume of the cassette and the alignment of the overfill layer are made after the load handling device is removed from the products. The bridge crane for carrying out the method comprises a undercarriage, a sliding column mounted on it with a multi-seat lifting device attached to its lower part, a bunker with transfer material and pipelines. In the attachment unit of the load gripping device to the removable section of the sliding column, windows are provided for passing a stream of transfer material through them. Two inclined planes form a flow reflector. A load gripping device with clamped electrode products is guided with a crane to the center of the loaded firing cassette, after which the products are placed on the bottom of the cassette. The lifting device is not removed, the free volume is filled with the transfer material to a height of at least 1/3 of the length of the products. The load handling device is then removed from the cassette and the remaining free volume is filled. Due to the preservation by the products of the vertical position and the size of the technological gaps between them, it is possible to unload the products from the cassettes after firing with the help of the lifting device on the crane. 2 sec. 2 hp ff, 3 ill. (L S o y VJ with

Description

The invention relates to non-ferrous metallurgy, in particular to methods for performing work when loading and unloading chambers of electronic production furnaces.

The purpose of the invention is to increase labor productivity in carrying out operations on loading and unloading cassettes with long products, ensuring that the vertical position of the products and the technological gaps between them are maintained.

The method involves placing the product vertically at the bottom of the cassette using a load handling device and filling the free volume of the cassette with the transfer material. The specified filling is initially performed to a height of not less than 1/3 of the length of the articles installed in the cassette before the load handling device is removed from the products, and the remaining part of the free volume of the chamber and the upper transfer layer are filled after the load handling device is removed from the product.

This sequence of operations when loading long products into kiln cassettes ensures that they remain vertical in the cassette and preserve the technological gaps between them due to the fact that the load handling device thus functions as a template that fixes the vertical position of the long products loaded into the cassettes and necessary technological gaps between them. Filling the cassette with long items with the transfer material before removing the load gripping device to a height of not less than 1/3 of the length of the products ensures the stability of long products in the cassette.

An overhead crane for carrying out the method comprises a undercarriage mounted on it a sliding column with a multi-gripping device mounted to its lower part by means of an attachment unit equipped with intermediate spacer elements, a bunker with transfer material and a discharge system that contains two vertical telescopic pipelines, one of which is located with the possibility of its penetration into the firing chamber cassettes, and the other pipeline is connected to the bottom of the pull-out column COROLLARY inclined section of pipe, which is a continuation of the interior of the lower portion extendable column having an open outlet in the direction of node attaching lifting devices.

In connection with the abrasive effect of the transfer material flow on the lower part of the sliding column, there is a need for its periodic maintenance and repair. In order to increase maintainability, the lower part of the sliding column is made in a removable design and

it is equipped with a fastening assembly to the upper part of the sliding column and fastening assemblies to it with an inclined section of the pipeline and a load gripping device.

To increase durability

internal channel removable bottom

retractable column can be equipped

lined with wear resistant material.

In addition, in order to evenly distribute the transfer material on the sides of the firing chamber cassette, the attachment point of the load gripping device to the sliding crane column is made with a window that communicates with the internal channel 5 and the lower part of the sliding column and below the window cavity in the load gripping device, at the bottom from the opposite sides there are two side windows between which

0 there is a double-sided reflector of the transfer material flow, consisting of two tilted conjugates. planes forming an upward wedge.

5C with the aim of increasing maintainability, the inclined planes of the flow reflector are made in a removable design.

Figure 1 shows a bridge crane, a general view; FIG. 2 is a view A of FIG. one; in FIG. 3 a section BB in FIG. 2.

The crane contains a bridge 1 with a chassis trolley 2, on which a sliding column 3 is placed with a load-gripping multi-seat device 4 mounted on the lower

5 the end of the sliding column 3, made in the form of a removable section 5, by means of the attachment unit 6.

The load gripping device 4 has clamping elements located at its ends.

0 levers 7 and intermediate spacers 8. On the crane truck, there is also a bunker 9 with a transfer material, equipped with a supply system for the transfer material to the firing cassettes, which includes two vertical telescopic pipelines 10 and 11. The pipe 10 is designed to recess into the cassette. The pipeline 11 is connected by means of a clutch section of the pipeline 12 with a removable section 5 of the sliding column 3. In the node 6 for securing the load-gripping device 4 to the removable section 5 of the sliding column 3, windows 13 and 14 are provided;

5 to allow flow of discharge material through them.

Two inclined planes form the reflector 15 of the stream of transfer material in the form of a yt directed scrap upward wedge with a corner angle of 90-120 ° C

The value of this angle was determined experimentally, taking into account the angle of repose of the coke overfill.

Position 16 marked lifted lifting device 4 lengthy, for example electrode products. Arrow D indicates the direction of the flow of the transfer material falling on the reflector, and the walls E indicate the direction of the reflected flow of the transfer material.

The method of loading the firing cassettes is carried out in the following sequence.

Multiple lifting device 4 is installed using a sliding column 3 on a group of vertically installed with the necessary gap between the electrode products to be loaded into the firing cassette. In this case, the intermediate spacer elements 8 of the load holding device 4 enter into the gaps between the blanks. The electrode products are fixed in the load gripping device 4 by means of remotely controlled levers 7. The load gripping device 4 with clamped electrode products 16 is led, with the help of a crane, to the center of the loaded firing cassette, after which the products 16 are placed on the bottom of the cassette. Then, the free volume of the cassette is filled with the transfer material, which comes from the bunker 9 through the telescopic pipeline 11, the inclined section of the pipeline 12, the removable inner plane, section 5 and windows 13 and 14 in the attachment unit 6.

 The cassette is filled with the transfer material to ensure full stability of the electrode products in the layer of the transfer material. It was experimentally determined that this corresponds to a height of the layer of overfilling not less than 1/3 of the length of the electrode products.

Then the load handling device 4 is withdrawn from the cassette, retracted to the side and continue to fill the free volume of the cassette with the transfer material through the telescopic conduit 10. s, V-h, As a result of being stored during storage. The vertical position of the products and the size of the technological gaps between them ensure the possibility of unloading the products from the cassettes after firing using the lifting device on the crane.

Claims (3)

Invention Formula 1. The method of loading the kiln cassettes with long products, including the vertical installation of a number of products in cassettes with technological gaps between the products and the subsequent filling of the free volume of the cassettes with a transfer material, characterized in 5 that, in order to increase productivity by maintaining the vertical position of the products and technological gaps between them, filling the free volume of the cassettes with the transfer material is carried out when the position of the products is fixed by at least 1/3 the length of the products, and filling the remaining part The free volume of the cassette is carried out after removing the load gripping device from the products. 2. A bridge crane for loading the kiln cassettes with long products containing a running carriage with a sliding column placed on it with 0 mounted on its lower end of a multi-seat lifting device, equipped with clamping levers and intermediate spacers, a bunker with a transfer material and pipes with pipes for discharging transfer material from the bunker, characterized in that, in order to increase productivity and ease of loading and unloading, one of the pipelines made with the possibility of its penetration into the cassettes, and the other pipeline is docked with the lower part of the sliding column by means of an inclined section of the pipeline, continuing to Ora serves inner cavity bottom 5 parts of a sliding column having an open outlet in the direction of the attachment point of the load gripping device. 3. A crane according to claim 2, characterized in that, in order to increase its maintainability In addition, the lower part of the sliding column is made removable and has a fastening assembly to the upper part of the column and a fastening assembly to it for the inclined section of the pipeline and the load gripping device. 54. The crane of claim 2, wherein that, in order to evenly distribute the transfer material over the free volume of the firing cassette, - the load gripping device to the sliding 0, the crane column is made with a window connecting its internal cavity with a cavity in the lower part of the sliding column, in the walls of the attachment unit there are two side windows on opposite sides, between 5 which accommodates a double-sided reflector of the transfer material flow, containing two inclined planes adjoining each other, forming an upward wedge with an angle of 90-120 ° at its top and made removable. t r t t 05 to 6-5 FIG. 3