阅读说明：本技术 一种用于电磁旋流水口搅拌器的可移动式支撑装置 (Movable supporting device for electromagnetic rotational flow nozzle stirrer ) 是由 石红燕 吴春雷 王强 李德伟 沈长华 王中学 张佩 朱晓伟 刘晓明 赵立佳 于 2021-01-28 设计创作，主要内容包括：本发明属于钢铁连续铸造领域,具体是一种用于电磁旋流水口搅拌器的可移动式支撑装置,所述装置包括底座、配重箱、纵向推杆、横向推杆、安装臂和伸缩臂；底座的下部设置支撑腿,底座顶面与安装臂之间设置横向推杆,横向推杆驱动安装臂横向运动,安装臂内设置纵向推杆和伸缩臂,纵向推杆的顶端与伸缩臂的底端连接,纵向推杆驱动伸缩臂从安装臂的一端伸出,安装臂的另一端设置配重箱；伸缩臂的顶端设置与电磁旋流水口搅拌器连接的连接槽。本发明不仅解决了电磁旋流水口搅拌器由于连铸现场高温、空间狭小而无法自由移动的问题,同时有利于现场工人进行保护渣投放等操作,实现安全生产。(The invention belongs to the field of steel continuous casting, and particularly relates to a movable supporting device for an electromagnetic swirl nozzle stirrer, which comprises a base, a weight box, a longitudinal push rod, a transverse push rod, a mounting arm and a telescopic arm; the lower part of the base is provided with supporting legs, a transverse push rod is arranged between the top surface of the base and the mounting arm and drives the mounting arm to move transversely, a longitudinal push rod and a telescopic arm are arranged in the mounting arm, the top end of the longitudinal push rod is connected with the bottom end of the telescopic arm, the longitudinal push rod drives the telescopic arm to extend out from one end of the mounting arm, and the other end of the mounting arm is provided with a weight box; the top end of the telescopic arm is provided with a connecting groove connected with the electromagnetic rotational flow water gap stirrer. The invention not only solves the problem that the electromagnetic rotational flow nozzle stirrer can not move freely due to high temperature and narrow space in the continuous casting field, but also is beneficial to the field workers to carry out operations such as casting powder throwing and the like, thereby realizing safe production.)

1. A movable supporting device for an electromagnetic rotational flow nozzle stirrer is characterized by comprising a base (6), a weight box (7), a longitudinal push rod (8), a transverse push rod (9), a mounting arm (10) and a telescopic arm (11);

the lower part of the base (6) is provided with supporting legs (13), a transverse push rod (9) is arranged between the top surface of the base (6) and the mounting arm (10), the transverse push rod (9) drives the mounting arm (10) to move transversely, a longitudinal push rod (8) and a telescopic arm (11) are arranged in the mounting arm (10), the top end of the longitudinal push rod (8) is connected with the bottom end of the telescopic arm (11), the longitudinal push rod (8) drives the telescopic arm (11) to extend out from one end of the mounting arm (10), and the other end of the mounting arm (10) is provided with a weight box (7);

the top end of the telescopic arm (11) is provided with a connecting groove (12) connected with the electromagnetic rotational flow nozzle stirrer.

2. The movable supporting device for the electromagnetic swirl nozzle agitator of claim 1, wherein the number of the supporting legs (13) is four, and the supporting legs are respectively arranged at four corners of the base (6).

3. The mobile support device for an electromagnetic swirl nozzle agitator according to claim 1, characterized in that the base (6) is square in shape.

4. The movable support device for an electromagnetic swirl nozzle agitator according to any one of claims 1-3, wherein a plurality of pulleys are further provided on the bottom surface of the base (6).

Technical Field

The invention belongs to metal casting, in particular to the field of steel continuous casting, and particularly relates to a movable supporting transmission device for assisting an electromagnetic rotational flow nozzle stirrer.

Background

In the continuous casting production process of steel, molten steel enters a crystallizer from a tundish through a submerged nozzle, and the flowing state of the molten steel in the crystallizer directly influences the quality of a casting blank and steel. The molten steel can generate bias flow due to the reasons of the inner wall nodulation of the water gap, improper operation and the like. And, with the increase of the pull rate, the bias current will be increased continuously. The electromagnetic rotational flow water gap continuous casting technology is characterized in that an electromagnetic rotational flow water gap stirrer is installed on the outer side of a submerged nozzle, stirring intensity is regulated and controlled by changing current parameters, and then molten steel in a water gap is enabled to rotate without contact. The rotary flow of the molten steel in the water gap can effectively enhance the uniformity and stability of the outflow of the water gap, and improve the flowing state and temperature distribution of the molten steel in the crystallizer, thereby improving the quality of casting blanks. By using the electromagnetic rotational flow water gap continuous casting technology, the molten steel in the water gap can be rotated, the water gap is prevented from being blocked, and the molten steel in the submerged water gap can be driven to rotate by the rotational flow of the molten steel in the submerged water gap, so that the metallurgical effect similar to the electromagnetic stirring effect of the crystallizer is obtained. Because the material of the water gap can not generate a shielding effect on the magnetic field, compared with the electromagnetic stirring device of the crystallizer, the electromagnetic rotational flow water gap device has better magnetic field utilization rate, smaller size and lower manufacturing cost.

When molten steel is cast, an electromagnetic rotational flow nozzle stirrer needs to be fixed on the outer side of an immersion nozzle between a tundish and a crystallizer. However, the bottom of the tundish is provided with a quick-change nozzle device, and part of steel enterprises are provided with automatic slag adding equipment, so that the space at the position is narrow. In addition, if the electromagnetic cyclone device is directly fixed at the bottom of the tundish, the operation of observing the liquid level change of the crystallizer by an operator, manually adding protective slag and the like is not facilitated. Once a safety accident happens, the electromagnetic swirl nozzle stirrer cannot be moved out of the working position in a short time. Moreover, because the equipment is heavy and the field high-temperature environment is severe, in order to ensure safety, an operator cannot move the electromagnetic cyclone device into or out of the working position outside the submerged nozzle in a short distance.

Chinese patent application CN103203450A discloses an electromagnetic rotational flow water gap for continuous casting, which comprises a water gap pipe and an electromagnetic rotational flow device, wherein the electromagnetic rotational flow device is installed around the middle area of the water gap pipe. However, the problem of installation, support and movement of the electromagnetic cyclone stirrer still exists in the patent application, and the replacement is inconvenient. Therefore, a set of movable supporting and transmission device needs to be designed to meet the requirement of industrial application of the electromagnetic swirl nozzle continuous casting technology.

Disclosure of Invention

The invention aims to provide a movable supporting device for an electromagnetic rotational flow nozzle stirrer, which not only solves the problem that the electromagnetic rotational flow nozzle stirrer cannot move freely due to high temperature and narrow space in a continuous casting field, but also is beneficial to field workers to carry out operations such as casting powder throwing and the like, and realizes safe production.

In order to achieve the purpose, the invention adopts the following technical scheme:

a movable supporting device for an electromagnetic rotational flow nozzle stirrer comprises a base, a weight box, a longitudinal push rod, a transverse push rod, a mounting arm and a telescopic arm;

the lower part of the base is provided with supporting legs, a transverse push rod is arranged between the top surface of the base and the mounting arm and drives the mounting arm to move transversely, a longitudinal push rod and a telescopic arm are arranged in the mounting arm, the top end of the longitudinal push rod is connected with the bottom end of the telescopic arm, the longitudinal push rod drives the telescopic arm to extend out from one end of the mounting arm, and the other end of the mounting arm is provided with a weight box;

the top end of the telescopic arm is provided with a connecting groove connected with the electromagnetic rotational flow water gap stirrer.

Preferably, the number of the supporting legs is four, and the supporting legs are respectively arranged at four corners of the base.

Preferably, the base is square in shape.

Preferably, a plurality of pulleys are further arranged on the bottom surface of the base.

In the invention, the base is contacted with the ground through four supporting legs, and the installation height of the stirrer can be adjusted. The lower part of the base is provided with a pulley (such as a universal wheel and the like), and when the four supporting legs are lifted, the supporting and moving device can be integrally moved (transversely or longitudinally). The upper part of the base is provided with a mounting arm and a telescopic arm. The telescopic arm is arranged in the cavity of the mounting arm and extends out or retracts back according to the requirement. The top end of the front part of the telescopic arm is connected with the electromagnetic rotational flow water gap stirrer through a connecting groove. The tail end of the mounting arm is provided with a weight box, and the weight of the weight box can be adjusted according to the weight of the electromagnetic rotational flow nozzle stirrer. The tail end of the mounting arm is internally provided with a longitudinal push rod (which can be an electric push rod or a manual push rod) which can control the telescopic arm to move longitudinally. A transverse push rod (which can be an electric push rod or a manual push rod) is arranged between the mounting arm and the base, and the mounting arm can be controlled to move transversely.

The invention is used for fixing the electromagnetic rotational flow water gap stirrer, is completely and independently arranged between the bottom of the tundish and the vibration platform, and is not connected with any continuous casting equipment. The continuous casting machine can meet the requirements of continuous casting production of square billets, round billets and plate billets only by fixing the continuous casting machine at a proper position of the continuous casting working area maintenance platform.

The mounting arm is arranged on the upper part of the base and is of a hollow structure, and the telescopic arm is arranged in the mounting arm. The mounting arm can realize transverse movement, and the telescopic arm can complete longitudinal movement.

The push rod in the invention can move the mounting arm or the telescopic arm by a motor, and can also move the mounting arm or the telescopic arm by a rocker arm in a manual mode.

The operation method of the movable supporting and transmission device comprises the following steps:

firstly, lifting four supporting legs on a base of a supporting transmission device, and moving the supporting transmission device to an appointed position of a continuous casting working area maintenance platform; after the position of the supporting leg is fixed, the height of the electromagnetic rotational flow nozzle stirrer is controlled by adjusting the supporting leg, so that the bottom surface of the electromagnetic rotational flow nozzle stirrer is slightly higher than the upper end surface of the continuous casting vibration platform; the front part of the telescopic arm faces to the submerged nozzle, and the transverse push rod is controlled according to the structure of the electromagnetic rotational flow nozzle stirrer, so that the mounting arm is arranged at the left and right sides of the nozzle or at the position aligned with the central line of the nozzle; after the pouring of the molten steel in the tundish is stable, controlling a longitudinal push rod to align an inner diameter opening of the electromagnetic rotational flow water gap stirrer with the outer diameter of a water gap; slowly fine-adjusting the transverse push rod and/or the longitudinal push rod to enable the submerged nozzle to enter the electromagnetic rotational flow nozzle stirrer and to be close to the inner wall surface as much as possible; and then, opening the electromagnetic rotational flow water gap stirrer to enable molten steel in the water gap to rotate.

Compared with the prior art, the invention has the beneficial effects that:

the invention can not only make the supporting device move integrally on the ground, but also can make the telescopic arm and the mounting arm move longitudinally and transversely under the fixed state of the supporting device, thereby adjusting the position of the electromagnetic swirl nozzle stirrer. The invention has simple structure, convenient operation and strong practicability, can greatly save manpower and material resources, reduces the operation danger and provides guarantee for the safety of personnel.

Drawings

FIG. 1 is a schematic view of a continuous casting structure of an electromagnetic swirl nozzle;

FIG. 2 is a top view of the telescoping arm of the mobile support of the present invention when retracted;

fig. 3 is a top view of the telescoping arm of the mobile support of the present invention when extended.

Reference numerals:

1. a tundish; 2. molten steel; 3. an electromagnetic swirl nozzle agitator; 4. an immersion nozzle; 5. a crystallizer; 6. a base; 7. a weight box; 8. a longitudinal push rod; 9. a transverse push rod; 10. mounting an arm; 11. a telescopic arm; 12. connecting grooves; 13. and (5) supporting legs.

Detailed Description

The invention is described in further detail below with reference to the figures and the detailed description.

Example 1

As shown in fig. 1, an electromagnetic swirl nozzle stirrer 3 is arranged outside a submerged nozzle 4 between a tundish 1 and a crystallizer 5. The molten steel 2 flowing from the tundish into the submerged nozzle 4 is subjected to a lorentz force to rotate the molten steel 2. When the current parameter of the electromagnetic swirl nozzle stirrer 3 reaches a certain value, the molten steel flowing out from the outlet of the submerged nozzle 4 keeps rotating in the crystallizer 5.

As can be seen from fig. 2-3, a support device for an electromagnetic swirl nozzle agitator is connected to the ground by four support legs 13 on the base 6. The support device is made of corrosion-resistant steel. The lower part of the base 6 can be provided with a pulley, and when the four supporting legs are lifted, the supporting device can be integrally moved. The upper part of the base is provided with a mounting arm 10 and a telescopic arm 11. A telescopic arm 11 is mounted within the cavity of the mounting arm 10 to be extended or retracted as required. The front part of the telescopic arm 11 is connected with the electromagnetic swirl nozzle stirrer 3 through a connecting groove 12. The end of the mounting arm 10 is provided with a weight box 7, and the weight of the weight box 7 is adjusted according to the weight of the electromagnetic swirl nozzle stirrer 3. The end of the mounting arm 10 is provided with a longitudinal push rod 8, and the longitudinal push rod 8 can control the telescopic arm 11 to move longitudinally. Between the mounting arm 10 and the base 6 is a transverse push rod 9 which controls the lateral movement of the mounting arm 10.

The operation method of the electromagnetic swirl nozzle stirrer supporting device comprises the following steps:

lifting up four supporting legs on a base of the supporting device, moving the supporting device to the position of a continuous casting working area maintenance platform, and enabling the telescopic arm to be in a retraction state as shown in figure 2; after the position of the supporting leg on the base is fixed, the height of the supporting leg of the base is adjusted so as to control the height of the electromagnetic rotational flow nozzle stirrer, and the lower surface of the electromagnetic rotational flow nozzle stirrer is slightly higher than the upper end surface of the continuous casting vibration platform; the front end surface of the telescopic arm faces to the submerged nozzle, and the transverse push rod is controlled according to the electromagnetic rotational flow nozzle stirrer structure, so that the mounting arm is positioned at the right side position of the nozzle; after the pouring of the molten steel in the tundish is stable, controlling a longitudinal push rod to align an inner diameter opening of the electromagnetic rotational flow water gap stirrer with the outer diameter of a water gap; slowly fine-adjusting the transverse push rod and the longitudinal push rod to enable the submerged nozzle to enter the electromagnetic rotational flow nozzle stirrer and to be close to the inner wall surface as much as possible, and at the moment, the telescopic arm is in an extending state, as shown in fig. 3; after the operation is finished, the electromagnetic rotational flow water gap stirrer is started to enable molten steel in the water gap to rotate.

Conventional technical knowledge in the art can be used for the details which are not described in the present invention.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.