Continuous casting ladle sliding nozzle driving mechanism

Abstract

The utility model belongs to the technical field of auxiliary equipment for metallurgical steelmaking, and particularly discloses a continuous casting ladle sliding nozzle driving mechanism which comprises a hydraulic cylinder and a hydraulic station used for driving a piston rod of the hydraulic cylinder to stretch out and draw back. A connecting rod is hinged to the second hinge piece, and one end of the connecting rod is fixedly connected with the middle sliding plate. A hydraulic cylinder in an existing sliding nozzle driving device is close to a sliding nozzle, so that parts in the hydraulic cylinder are easily damaged by high temperature. The hydraulic cylinder is placed on the side face of the steel ladle, the connecting piece is arranged between the piston rod of the hydraulic cylinder and the middle sliding plate, and the distance between the hydraulic cylinder and the sliding nozzle is increased, so that the hydraulic cylinder is not in a high-temperature environment for a long time any more, and parts in the hydraulic cylinder are prevented from being damaged by high temperature.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary equipment for metallurgy and steelmaking, in particular to a sliding nozzle driving mechanism for a continuous casting ladle. Background Art

[0002] The sliding nozzle mechanism of the ladle is an indispensable part of steelmaking. It plays a key role in accurately regulating the flow rate and temperature of molten steel during the casting process of the continuous casting machine. The working principle of the sliding nozzle is to drive the middle slide to slide between the upper slide and the lower slide through a driving device, thereby driving the opening and closing of the flow hole to adjust the flow rate of molten steel. Specifically, the upper slide is fixed to the bottom opening of the ladle, the lower slide is fixed to the top opening of the sliding nozzle, and the middle slide is slidably connected to the upper and lower slides. When the through hole on the middle slide coincides with the through hole on the upper and lower slides, the nozzle opening is the largest and the molten steel flow is the largest; the through hole on the middle slide is staggered with the through hole on the upper and lower slides to control the molten steel flow to become smaller, and the through hole on the middle slide is completely staggered with the through hole on the upper and lower slides to close the nozzle and stop the molten steel from flowing.

[0003] The sliding nozzle primarily consists of a drive mechanism, connectors, and refractory components (i.e., upper, middle, and lower slides, and nozzle). The drive mechanism is typically driven by a hydraulic cylinder, controlling the flow of molten steel. A direct-drive hydraulic cylinder connects one end of the piston rod directly to the lower slide within the carriage. The piston rod's retraction and expansion drive the lower slide and nozzle horizontally within the carriage, controlling the opening and closing of the nozzle and the flow of molten steel. There have been explorations in the prior art about direct-drive hydraulic cylinders for ladle sliding nozzles, such as the patent with application number 202022129831.2 and publication number CN213671799U. The patent describes a ladle sliding nozzle optimization device, and its basic principle is: a sliding mechanism is set on one side of the nozzle to control the flow of molten steel in the ladle to the transition ladle. The sliding mechanism consists of an oil cylinder and a slide plate. The oil cylinder is horizontally arranged, and its end away from the nozzle is fixed, and the telescopic rod on the other end is fixedly connected to the end of the slide plate. A steel flow hole is opened on the slide plate, and the movement of the slide plate is controlled by the oil cylinder to control the size of the steel flow hole in the nozzle, thereby achieving the purpose of controlling the flow of molten steel.

[0004] However, the hydraulic cylinder for the sliding nozzle of the ladle described in the above patent has certain disadvantages and shortcomings. One end of the telescopic rod is directly connected to the slide. The hydraulic cylinder serving as a driving device is close to the sliding nozzle. When the molten steel flows through the sliding nozzle, its own temperature is as high as about 1650 degrees Celsius. The temperature around the sliding nozzle is also very high. Therefore, the hydraulic cylinder will be in a high-temperature environment for a long time. Over time, the parts in the hydraulic cylinder will expand due to heat, and the fitting clearance will become smaller, increasing the risk of wear and failure. Utility Model Content

[0005] The purpose of the utility model is to provide a sliding nozzle driving mechanism for a continuous casting ladle, so as to solve the problem in the above patent that the hydraulic cylinder and the sliding nozzle are close to each other, resulting in the parts in the hydraulic cylinder being easily damaged by high temperature.

[0006] In order to achieve the above-mentioned purpose, the basic solution provided by the utility model is: a continuous casting ladle sliding water nozzle driving mechanism, including a hydraulic cylinder and a hydraulic station for driving the extension and retraction of the piston rod of the hydraulic cylinder, a first hinge and a second hinge are fixedly connected to the ladle, the first hinge and the second hinge are both hinged to the hydraulic cylinder, a connecting rod is hinged to the second hinge, and one end of the connecting rod is fixedly connected to the middle slide.

[0007] The principle and beneficial effect of the present invention are as follows: the hydraulic cylinder is placed on the side of the ladle, and a connecting piece is provided between the piston rod of the hydraulic cylinder and the middle slide, so that the distance between the hydraulic cylinder and the sliding water outlet is increased, so that the hydraulic cylinder is no longer in a high-temperature environment for a long time, thereby preventing the parts in the hydraulic cylinder from being damaged by high temperature.

[0008] Solution 2, a preferred alternative to the basic solution, comprises a first hinged member comprising a first lug and a first earring. The first lug is fixedly connected to the ladle, the first earring is fixedly connected to the hydraulic cylinder, and the first lug is pin-connected to the first lug. The pin connecting the first earring and the first lug facilitates placement of the hydraulic cylinder on the side of the ladle and facilitates removal.

[0009] Option 3, a preferred alternative to the basic option, features a second hinged member comprising a second lug, a connecting block, and a second lug. The second lug is fixed to the ladle, the second lug is pinned to the connecting block, the connecting block is pinned to the second lug, the second lug is fixed to the piston rod of the hydraulic cylinder, and the connecting block is pinned to the connecting rod. By providing a connector between the piston rod of the hydraulic cylinder and the sliding nozzle, the hydraulic cylinder's power is transmitted to the intermediate slide, achieving a large distance between the hydraulic cylinder and the sliding nozzle while effectively controlling the molten steel flow.

[0010] Option 4, a preferred alternative to the basic solution, features two extension plates fixed to the hydraulic station's oil tank. Vertical rods are rotatably threaded through these plates, each end of which is fixed to a horizontal rod with an arc-shaped slot fixed to it. By providing a vertical rod that can rotate along the oil tank to a certain angle, the hydraulic cylinder can be removed from the ladle and placed in the arc-shaped slot when no molten steel is flowing through the sliding nozzle. This allows the hydraulic cylinder to be positioned away from the ladle when not in use, effectively reducing its temperature. When the hydraulic cylinder is needed, the above steps can be repeated in reverse, providing convenient access and effectively reducing its temperature.

[0011] Option 5, which is the preferred option of the basic option, has a cylinder in the arc groove. The cylinder is convenient for placing the hydraulic cylinder in the arc groove, and the earring is put on the cylinder to fix the hydraulic cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1It is a structural diagram of the sliding nozzle driving mechanism of a continuous casting ladle in operation;

[0013] Figure 2 It is a three-dimensional diagram of the sliding nozzle drive mechanism of a continuous casting ladle when it is not working. DETAILED DESCRIPTION

[0014] The present invention is further described in detail below through specific implementation methods:

[0015] The reference numerals in the drawings of the specification include: hydraulic cylinder 1, connecting rod 2, ear seat 1 3, ear ring 1 4, ear seat 2 5, connecting block 6, ear ring 2 7, oil tank 8, extension plate 9, vertical rod 10, horizontal rod 11, arc groove 12, cylinder 13.

[0016] Example

[0017] like Figure 1 and Figure 2 As shown: A continuous casting ladle sliding nozzle drive mechanism, including a hydraulic cylinder 1 and a hydraulic station for driving the piston rod of the hydraulic cylinder to extend and retract, a first hinge and a second hinge are fixedly connected to the ladle, the first hinge and the second hinge are both hinged to the hydraulic cylinder 1, a connecting rod 2 is hinged to the second hinge, one end of the connecting rod 2 is fixed to the middle slide, the first hinge includes an ear seat 3 and an earring 4, the ear seat 3 is fixed to the ladle, the earring 4 is fixed to the hydraulic cylinder 1, the ear seat 3 is pin-connected to the earring 4, the second hinge The hinged parts include ear seat 2 5, connecting block 6 and earring 2 7. Ear seat 2 5 is fixed to the ladle, ear seat 2 5 is pin-connected to connecting block 6, connecting block 6 is pin-connected to earring 2 7, earring 2 7 is fixed to the piston rod of the hydraulic cylinder 1, connecting block 6 is pin-connected to the connecting rod 2, two extension plates 9 are fixed to the oil tank 8 of the hydraulic station, and vertical rod 10 is rotatably passed through the two extension plates 9. One end of the vertical rod 10 is fixed to a cross bar 11, and an arc groove 12 is fixed to the cross bar 11, and a cylinder 13 is provided in the arc groove 12.

[0018] The implementation method of this embodiment is as follows:

[0019] When the through holes on the middle slide need to be aligned or staggered with the through holes on the upper and lower slides, the hydraulic station drives the piston rod of the hydraulic cylinder 1 to extend or retract, and the piston rod of the hydraulic cylinder 1 drives the connecting block 6 to rotate a certain angle, and the connecting block 6 drives the connecting rod 2, and the connecting rod 2 drives the middle slide to move horizontally toward the sliding water outlet or away from the sliding water outlet.

[0020] When the hydraulic cylinder 1 needs to be placed away from the ladle, first remove the earring 1 4 from the ear seat 1 3, remove the earring 2 7 from the connecting block 6, then put the hydraulic cylinder 1 into the arc groove 12 and put the earring 1 4 on the cylinder 13, and then rotate the vertical rod 10 until the hydraulic cylinder 1 is away from the ladle.

[0021] When it is necessary to connect the hydraulic cylinder 1 with the ladle and the connecting block 6, first rotate the vertical rod 10 until the hydraulic cylinder 1 is close to the ladle, then remove the earring 4 from the cylinder 13, then connect the earring 4 to the pin shaft of the ear seat 3, and then connect the earring 2 7 to the connecting block 6.

[0022] The above is only an embodiment of the present invention, and the commonly known specific structures and characteristics of the scheme are not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, and these should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection claimed by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A sliding nozzle drive mechanism for a continuous casting ladle, characterized in that: The invention relates to a hydraulic station comprising a hydraulic cylinder (1) and a piston rod for driving the hydraulic cylinder to extend and retract. The ladle is fixedly connected with a first hinge and a second hinge. The first hinge and the second hinge are both hinged to the hydraulic cylinder (1). The second hinge is hinged with a connecting rod (2). One end of the connecting rod (2) is fixedly connected to an intermediate slide. Two extension plates (9) are fixedly connected to an oil tank (8) of the hydraulic station. A vertical rod (10) is rotatably passed through the two extension plates (9). One end of the vertical rod (10) is fixedly connected to a cross rod (11). An arc groove (12) is fixedly connected to the cross rod (11).

2. The sliding nozzle driving mechanism of a continuous casting ladle according to claim 1, characterized in that: The first hinged member comprises an ear seat 1 (3) and an ear ring 1 (4), wherein the ear seat 1 (3) is fixedly connected to the ladle, the ear ring 1 (4) is fixedly connected to the hydraulic cylinder (1), and the ear seat 1 (3) and the ear ring 1 (4) are pin-connected.

3. The sliding nozzle driving mechanism of a continuous casting ladle according to claim 1, characterized in that: The second hinged member comprises an ear seat 2 (5), a connecting block (6) and an ear ring 2 (7), wherein the ear seat 2 (5) is fixedly connected to the ladle, the ear seat 2 (5) is pin-connected to the connecting block (6), the connecting block (6) is pin-connected to the ear ring 2 (7), the ear ring 2 (7) is fixedly connected to the piston rod of the hydraulic cylinder (1), and the connecting block (6) is pin-connected to the connecting rod (2).

4. The sliding nozzle driving mechanism of a continuous casting ladle according to claim 1, characterized in that: A cylinder (13) is provided in the arc-shaped groove (12).

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