RU2585583C2 - Universal slide gate for batched casting of steel-pouring ladles - Google Patents

Abstract

FIELD: metallurgy.

SUBSTANCE: invention relates to liquid metal casting. Sliding shutter includes housing with guides, top fixed part (1) with fixed sliding plate and moving part (2) with movable sliding plate (7), and spring elements (8) for compression of slide plates. Lower part (4) of housing is articulated with its movable part. Guides (12) are located on movable and lower parts of housing on both sides of steel teeming holes. During movement of movable part of body relative to its lower part of said guides spring elements transmitted load for compression of slide plates.

EFFECT: stable pressing of slide plates to each other, which increases service life of the gate.

7 cl, 5 dwg

Description

The invention relates to metallurgy and is intended for casting liquid metal from metallurgical ladles.

Known slide gate, in which a movable part with a fixed slide plate is installed in the fixed part of the housing with the possibility of reciprocating motion along its guides. In this case, the movable sliding plate is pressed by means of elastic elements to the stationary sliding plate (ed. St. USSR No. 535029, IPC B22D 41/08, 1976).

The disadvantages of this slide gate include a short service life and low reliability due to the complexity of the device for mounting and dismounting elastic elements.

The closest analogue of the claimed invention is a slide gate for a steel pouring ladle, comprising a housing consisting of an upper fixed part with a fixed slide plate installed in it and a moving part with a movable slide plate, guides and spring elements for compressing the slide plates (Patent FR No. 2400402, A1, B22D 41/08, 03.16.1979). This device also contains a mechanism for regulating the position of the guides, made in the form of two shoulders levers connected by one shoulder with the movable part of the body, and the other shoulder - by means of elastic elements with the fixed part of the body.

The disadvantages of this gate valve are not high enough performance indicators, in particular, the limited service life of the gate plates due to the instability of their pressing against each other due to the presence of elastic elements, the elastic properties of which vary depending on temperature. The negative effect of high temperatures requires high demands on the material of the elastic elements and bolted joints, to eliminate the negative impact in some cases, forced cooling is used. In addition, the well-known slide gate is inconvenient in operation, since it requires constant verification of the degree of pressing of one slide plate to another and, as a result, timely control of the pressing force. The use of expensive elastic elements and their constant replacement lead to a significant increase in the cost of the slide gate.

The problem to which the invention is directed, is the development of a slide gate valve having an increased service life, convenience and reliability in operation, as well as manufacturability and low cost.

The technical result consists in creating a stable pressing of the slide plates to each other in a wide range of operating temperatures by using the effect of thermal expansion of parts and gate components, removing power elements from the high temperature zone, providing a reliable method of visual and dynamometric control of the blocks of elastic elements with the ability their rapid replacement, as well as servicing the slide gate on both horizontal and vertical stands during operation tatsii.

The technical result is achieved by the fact that the slide gate housing is provided with a lower part pivotally connected to the movable part of the housing, while the guides are located on the movable and lower parts of the housing on both sides of the steel pouring hole.

The technical result is also achieved by the fact that the guides are made curved, and the movable part of the housing is made with the possibility of horizontal and vertical movement along curved guides by means of gears forming gearing with curved guides, and load transfer to the spring elements for compressing the slide plates.

The technical result is also achieved by the fact that the slide gate is provided with vertical guides located in the fixed and movable parts of the housing, and support rollers located in vertical guides along the entire length of the slide plates, and a drive, for example, hydraulic, for moving the movable slide plate located in the movable body parts, along curved guides to a level parallel to the stationary part of the body.

The technical result is also achieved by the fact that, as the gears, the slide gate comprises cylindrical or bevel wheels with a circular or trapezoidal tooth.

The technical result is also achieved by the fact that needle bearings are mounted on the axles of the gears.

The technical result is also achieved by the fact that the guides are removable.

The technical result is also achieved by the fact that the guides are made rectilinear, and the movable part of the housing is arranged to move along the rectilinear guides by means of cylindrical linear bearings consisting of cylindrical rollers assembled in a separator.

The invention is illustrated by drawings, where in FIG. 1 shows a general view of a universal slide gate with a deployed gate assembly; in FIG. 2 shows a cross-section of a shutter housing along curved guides; in FIG. 3 shows a view of a shutter body with a slit of slide plates, where section AA shows vertical guides and support rollers controlling the parallelism of arrangement of parts of the body during reciprocating motion; in FIG. 4 conventionally shows one of the gearing gear wheels during curvilinear movement along the guides; in FIG. Figure 5 shows a longitudinal section along section AA of the slide gate, indicating the elements of the assembly units and the use of special devices (bracket and cylinder) for assembling and disassembling the slide gate.

In the figures, the positions indicated:

1. The upper fixed part of the housing

2. The movable part of the housing

3. Bracket

4. The lower part of the body

5. Intermediate valve stem

6. Stoppers

7. Movable slide plate

8. Blocks of elastic elements

9. Swivel

10. Collector holder

11. Wheels

12. Curved guides

13. Vertical guides

14. Spacer rollers

15. Roller holder

16. Needle bearings

17. The hydraulic cylinder

18. The cylinder rod

19. Adapter bracket

The housing of the claimed device is made up of several parts located at three levels, between the upper fixed part of the housing 1 and the movable part of the housing 2, on both sides of the pouring hole are detachable curved guides 12 through which through blocks of elastic elements 8 symmetrically distributed along the path overlapping slide plates, the refractory elements are pressed. Horizontal and vertical movements along curved guides 12 are carried out by gears of 4 wheels 11 of a movable sliding plate 7 under the influence of, for example, a hydraulic drive. In the vertical direction, to avoid distortions, jamming of the mechanism and uniform distribution of efforts of the blocks of elastic elements 8, vertical guides 13 are used, which control the parallel arrangement of parts of the body when moving along a curved surface by means of vertical spacers 14 in the supports of the movable part of the body 2.

To service the slide gate, the lower part of the housing 4 by means of a swivel joint 9 is opened at an angle of 90 to 120 degrees. This provides access to the movable sliding plate 7, which, in turn, is deployed on parallel spaced 2 gears 11 in the split guides of the movable part of the housing 2 at the same angle. After replacing the refractory part, the assembly of the slide gate is carried out in the reverse sequence and, when the closure of the curved guides 12 is fixed, the blocks of elastic elements 8 are cocked by the hydraulic cylinder 17 through the intermediate stem of the shutter 5.

Needle bearings 16 can be used as friction elements to synchronize the movement of rotation and ensure reliability in terms of load capacity in the gears 11.

The movement along the curved guides 12 located in the lower part of the housing 4 is carried out by means of gear-rack gearing with a step “T”, the wheels 11 are moved along the ascending curved section of the moving part of the housing 2 in the curved guides 12 by the angle “B” and the lifting height “B ", With a change in the lifting height of which there is an increase in stresses in the blocks of elastic elements 8 located between the upper stationary part of the housing 1 and the moving part of the housing 2.

When servicing the slide gate to open the lower part of the housing 4 and remove the locking elements 6, the installation of 4 eccentric lifters is provided for the slide gate assembly technology, where the cams act as a mechanism for cocking the elastic elements to the height “B”, ensuring the required working position of the guides during operation. It is also possible to cock the elastic elements of the slide gate mechanically using, for example, a hydraulic cylinder 17 with the additional use of an adapter bracket 19 by compressing the movable part of the housing 2 and the lower part of the housing 4 with the rod of the hydraulic cylinder 18 relative to the hinge joint 9.

This kinematic scheme involves the use and maintenance of the above design of the slide gate on special horizontal stands, which, in turn, due to the weak vertical bearing load of 4 gear rollers makes it difficult to use vertical assembly technology using a special manipulator.

To achieve an increase in the required bearing capacity in the proposed three-level design of the slide gate, it is possible to replace the removable curved guides 12 with straight guides located directly on both sides of the movable part of the housing 2, for the movement of which cylindrical bearings of linear type consisting of 10-15 cylindrical rollers are used diameters from 15 to 20 mm, collected in a separator.

The three-level construction of the shutter housing suggests that, as the farthest from the zone of exposure to high temperatures, the upper stationary part of the housing 1 contains all the required independent power blocks of elastic elements, the movable part of the housing 2 is used as a node that closes the system of elastic elements, controlling both horizontal and vertical the movement of the movable slide plate 7 relative to the lower part of the housing 4, which receives all the thermal effects from the molten metal mirror, and a change in the geo whose metric from thermal expansion contributes to the compression effect of the sliding plates between the upper fixed part of the housing 1 and the movable part of the housing 2. Various types of products can be used as elastic elements, for example: twisted elastic elements, plate-shaped elastic elements, gas-filled elastic elements.

The redistribution of the load force between the sliding plates occurs due to the translational movement of the moving sliding plate 7 located in the moving part of the housing 2, carried out along a curved path to a level parallel to the upper stationary part of the housing 1 under the influence of, for example, a hydraulic actuator, in which in a plane perpendicular the upper stationary part of the housing 1 creates the maximum voltage between the parts of the housing, while moving the movable part of the housing 2 in a plane parallel to the upper fixed part of the housing 1, is controlled by spacer rollers 14 in the guides of the upper fixed part of the housing 1 and the movable part of the housing 2 along the entire length of the slab slabs, while these guides are perpendicular to the plane of the upper fixed part of the housing 1.

The universality of the inventive gate valve is determined by the fact that the proposed device in the technological cycle of metallurgical shops allows the replacement of the refractory part both on vertical and horizontal service stands, as well as the possibility of its use when casting metal both on an ingot and on continuous machines casting blanks (CCM).

The inventive slide gate expands the possibility of operation during casting, allows you to quickly control the operation of elastic elements, provides reliability and quality of casting, which is achieved by providing the discussion staff with sufficient control of the aggregate conditions of the condition of the casting device necessary to make decisions on the frequency of use of refractory products in order to reduce costs production.

Claims (7)

1. A universal slide gate for a steel pouring ladle, comprising a housing with rails, an upper fixed part with a fixed sliding plate installed in it and a moving part with a movable sliding plate, and spring elements for compressing the sliding plates, characterized in that the housing is made with a lower part, pivotally connected to the movable part, and the guides are located on the movable and lower parts of the housing on both sides of the steel pouring hole, the movable part of the housing being movably relative to its lower part along the said guides and load transfer to the spring elements for compression of the slide plates. 2. The universal slide gate according to claim 1, characterized in that the guides are made curved, and the movable part of the housing is made with the possibility of horizontal and vertical movement along curved guides by means of gears forming gear engagement with curved guides, and load transfer to the spring elements for compression gate plates. 3. The universal slide gate according to claim 2, characterized in that it is provided with vertical guides located in the fixed and movable parts of the housing, and support rollers located in vertical guides along the entire length of the gate plates, and a drive, for example, hydraulic, for moving the movable sliding plate located in the moving part of the body, along curved guides to a level parallel to the fixed part of the body. 4. The universal slide gate according to claim 2, characterized in that it contains cylindrical or bevel wheels with a circular or trapezoidal tooth as gears. 5. The universal slide gate according to claim 2, characterized in that needle bearings are mounted on the axles of the gears. 6. The universal slide gate according to claim 1, characterized in that the guides are removable. 7. The universal slide gate according to claim 6, characterized in that the guides are straight and the movable part of the housing is movable along straight guides by linear type cylindrical bearings consisting of cylindrical rollers assembled in a separator.

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