SU933730A1 - Apparatus for batch vacuum treatment of metal - Google Patents

Description

(S) INSTALLATION FOR PORTABLE METAL VACUUM

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The invention relates to metallurgy and is aimed at further improving devices for vertically moving the bucket during batch evacuation.

A known structure of a metal slag processing unit in vacuum, comprising a fixed stationary vacuum chamber with a downward lining pipe, a pouring ladle mounted above the vacuum chamber, a receptacle for liquid slag placed under the tube and a mechanism for moving the receiving tank made in the form of with the hydraulic cylinder of the arm, one end of which is fixed in the thrust bearings, and the other end - forked is equipped with cargo hooks, while the cylinder head of the hydraulic cylinder is pivotally connected to the middle portion of the lever and the outer side of the bottom of the cylinder housing and fixed by

the wind support forms the simplest kinematic pair of p.

However, along with dignity. the simplicity of the lever system, there is a disadvantage in that the minimal dimensions of the lever required from a constructive point of view with the required raising of the vacuum chamber of the bucket by 2 ... 2.5 m cause a significant horizontal movement

10 vacuum-tube nozzles when lifting, which ultimately leads to a decrease in productivity, additional energy consumption for lifting, and when the slag solidifies on the surface of the metal of the bucket, it can cause the vacuum-tube nozzle to break.

The closest to the proposed technical essence and the achieved result is the installation

20 for batch evacuation of a metal, containing permanently installed a vacuum chamber with a downwardly lining branch pipe, steel. The casting bucket placed under the nozzle and the transfer mechanism became a casting bucket in the form of a lever connected to the hydraulic cylinder, which was fixed in the support by means of a hinged weight and fitted with hooks 2 J. The disadvantage of this installation is the presence of an open gear transmission. The purpose of the invention is to simplify the design. This goal is achieved by the fact that in a known unit for portion-metal evacuation, which contains a permanently installed vacuum chamber with waste down lined. a pipe, a pouring ladle placed under the pipe, and a mechanism for moving the bucket in the form of a lever with hooks connected to a hydraulic cylinder, fixed in a support by means of an articulated hanger, the movement mechanism is equipped with a roller-support mounted on, and a curved guide contacting the lever. The drawing shows a device for batch evacuation of metal, a general view. A device for batch vacuuming of a metal includes a steel-earthen bucket 1 with liquid metal on the carriage 2, a vacuum unit 3 mounted on a metal structure k and connected by a vacuum line 5 to a vacuum pump (not shown), and a lifting mechanism - lowering the bucket 1. The mechanism for raising the steel teeming yowshaw 1 consists of a lever 6 hung under the support 7 by means of an articulated suspension 8; At one end, the lever 6 with the help of hooks 9 interacts with the trunnions of the bucket 1, the other end with the hydraulic cylinder 10. The lever 6 is provided with a roller support 11, which contacts the curvilinear surface of the guide 12. In order to balance the moving loads, the lever 6 has a counterweight 1

The device works as follows.

The bucket 1 with the molten metal on the trolley 2 is fed under the vacuum chamber 3. The hooks 9 are brought into engagement with the trunnions of the bucket 1. Using the hydraulic cylinder 10, the bucket 1 is lifted along a vertical path to the level that provides immersion.

Claims (2)

Invention Formula An installation for batch vacuuming of metal, containing a permanently installed vacuum pump with outgoing DOWN lined pipe, a pouring ladle placed under the pipe, and a mechanism for moving the bucket in the form of an associated lined pipe to molten metal. The linear movement of the bucket 1 is ensured by the presence of the roller supports 11 moving along the curvilinear surface of the guide 12. When lifting the bucket 1, relative movement is performed - rotation of the lever 6 around the hinge 15. Simultaneously carried out movement - rotation of the suspension 8 around the hinge 16 along the arc 17, caused by movement of the roller 11 along the guide 12. As a result of the addition of these movements (absolute) The straight path for the bucket 1 ". After immersing the lined tube t in the molten metal in the vacuum chamber 3, a vacuum is created - the degassing process takes place, and the lifting mechanism rotates the bucket 1 in lax, providing contact lined nozzle T4 with liquid metal. After the degassing process 3 is completed, the atmospheric pressure is created in the vacuum chamber 3, the bucket 1 is lowered into the lower (initial) position on the trolley 2. The cycle is over .. The economic effect of introducing the device arises due to the installation in the bucket lifting mechanism of the lower dual-movable kinematic pair (roller support ). The presence of such a pair reduces the amount of technical; service and repair and increase the time of the latter. As a result, the labor intensity of repairs is reduced by 20 man-days per 1000 pl, which allows an additional 3000 tons of steel to be smelted per year. The estimated economic effect in the national economy is about 10 thousand rubles. in year. with a lever hydraulic cylinder with hooks, fixed in a support by means of a hinged sub-crescent, so that, in order to simplify the design, the movement mechanism is provided with a roller-support mounted on the lever and a curvilinear head- in contact with snarling gom Sources of information taken into account in the examination K USSR Author's Certificate No. 373308, cl. From 21 to 7/10, 1973. 2. USSR author's certificate 1PO application No. 2725381 (22-02), C. C 21 C 7/10, 1979.