阅读说明：本技术 一种电弧炉填砂装置 (Electric arc furnace sand filling device ) 是由 尉强 于 2019-10-11 设计创作，主要内容包括：本发明公开了一种电弧炉填砂装置,包括摆动缸、支撑臂、砂斗及开闭机构,所述摆动缸安装于炉壳上,摆动缸的驱动端与摆动销的上端相连,摆动销与自炉壳伸出的支撑钢板连接；所述支撑臂的一端与摆动销固连,支撑臂的另一端与砂斗的外壁固定,摆动缸通过摆动销可带动支撑臂及砂斗绕摆动销的中心转动,使砂斗在工作位和装砂位之间自由切换；所述砂斗内设填砂通道,填砂通道的下端安装控制填砂通道开闭的开闭机构。本发明的有益效果为：本发明所述填砂装置操作灵活可控,可实现填砂过程的无人化操作,大大提高了工作效率；并且,所述填砂装置可避免工人在恶劣条件下高危操作,节省了人工成本,安全又可靠。(The invention discloses an electric arc furnace sand filling device which comprises a swinging cylinder, a supporting arm, a sand hopper and an opening and closing mechanism, wherein the swinging cylinder is arranged on a furnace shell, the driving end of the swinging cylinder is connected with the upper end of a swinging pin, and the swinging pin is connected with a supporting steel plate extending out of the furnace shell; one end of the supporting arm is fixedly connected with the oscillating pin, the other end of the supporting arm is fixed with the outer wall of the sand hopper, and the oscillating cylinder can drive the supporting arm and the sand hopper to rotate around the center of the oscillating pin through the oscillating pin, so that the sand hopper can be freely switched between a working position and a sand loading position; and a sand filling channel is arranged in the sand hopper, and an opening and closing mechanism for controlling the opening and closing of the sand filling channel is arranged at the lower end of the sand filling channel. The invention has the beneficial effects that: the sand filling device is flexible and controllable in operation, unmanned operation in the sand filling process can be realized, and the working efficiency is greatly improved; moreover, the sand filling device can avoid high-risk operation of workers under severe conditions, saves labor cost, and is safe and reliable.)

1. The electric arc furnace sand filling device is characterized by comprising a swinging cylinder, a supporting arm, a sand hopper and an opening and closing mechanism, wherein the swinging cylinder is arranged on a furnace shell, the driving end of the swinging cylinder is connected with the upper end of a swinging pin, and the swinging pin is connected with a supporting steel plate extending out of the furnace shell; one end of the supporting arm is fixedly connected with the oscillating pin, the other end of the supporting arm is fixed with the outer wall of the sand hopper, and the oscillating cylinder can drive the supporting arm and the sand hopper to rotate around the center of the oscillating pin through the oscillating pin, so that the sand hopper can be freely switched between a working position and a sand loading position; and a sand filling channel is arranged in the sand hopper, and an opening and closing mechanism for controlling the opening and closing of the sand filling channel is arranged at the lower end of the sand filling channel.

2. The sand-filling device of the electric arc furnace as claimed in claim 1, wherein the opening and closing mechanism comprises two baffles, two forked heads and a double-rod cylinder, and the plate surface direction of the baffles is vertical to the axial direction of the sand hopper; the lower port of the sand filling channel can be completely plugged after the two baffles are spliced; the tail part of each baffle corresponds to one end of the connecting fork-shaped head, the two baffle plates form a semi-scissor type structure, the middle parts of the two semi-scissor type structures are hinged through a center pin, the center pin is arranged in a pin cylinder, and the pin cylinder is arranged on the outer side of the sand hopper; two piston rods of the double-rod cylinder are arranged in a back-to-back manner and are respectively connected with the two fork-shaped heads; when the two driving rods of the double-rod cylinder move in the opposite direction/back direction to drive the outer ends of the two fork-shaped heads to move in the opposite direction/back direction, the two baffles are spliced to block the lower end opening of the sand hopper; otherwise, the two baffles are separated, and the lower port of the sand hopper is opened.

3. The electric arc furnace sand-filling apparatus of claim 2, wherein said baffle is of a semi-circular configuration, and the combination of two baffles forms a circular plate for blocking the lower end of the sand-filling passage.

4. The electric arc furnace sand-filling apparatus of claim 2, wherein a guide pin is provided in the middle of the double-rod cylinder, the guide pin being slidable back and forth along a guide groove provided in a guide frame fixedly mounted on the pin cylinder.

5. The electric arc furnace sand-filling device as claimed in claim 2, wherein a slot is provided in the lower part of the sand hopper in the radial direction, and the two baffles can be split or separated in the slot; the pin cylinder is arranged on one side of the slot.

6. The electric arc furnace sand-filling apparatus of claim 1 wherein a bushing is designed between the swing pin and the support steel plate.

7. The electric arc furnace sand-filling apparatus of claim 1, wherein the sand hopper comprises a cylindrical upper section and a funnel-shaped lower section; the opening and closing mechanism is mounted on the lower section part.

Technical Field

The invention relates to the field of electric arc furnace steelmaking, in particular to an electric arc furnace sand filling device.

Background

The slag-free tapping technology of electric arc furnaces is widely applied. The common forms mainly include a siphon tapping method, central bottom tapping, eccentric bottom tapping and the like, wherein the eccentric bottom tapping is to enable smelted molten steel to flow out through a tapping hole at the bottom of the furnace, which is deviated from the center of the bottom of the furnace, and flow into a ladle car below an electric arc furnace to be transported away, a furnace body needs to be inclined at a certain angle during tapping, and after tapping is completed, the tapping hole needs to be sealed and sealed for smelting next time. When the steel tapping hole is plugged, the eccentric bottom steel tapping device is used for plugging the steel tapping hole, then 2-5mm magnesia (containing other components) is added into the sand filling device arranged above the eccentric bottom steel tapping hole of the furnace shell to be plugged in the channel of the steel tapping hole, and plugging is tight, so that molten steel leakage during smelting is prevented. When the smelted molten steel meets the process requirement, the eccentric bottom tapping device is opened, magnesia automatically falls from the tapping hole under the pressure of the molten steel in the furnace, the molten steel smoothly flows into the ladle car, if the eccentric bottom tapping device is opened, the magnesia does not naturally fall, probably because of factors such as high magnesia quality or high water content, the magnesia is sintered at high temperature, and at the moment, oxygen blowing operation is needed, and the steel outlet is opened to enable the molten steel to flow out.

In the process, the field filling of the magnesia adopts manual operation for a long time, and the problems of overhigh temperature of the operation environment, strong heat radiation, large dust noise pollution, high labor intensity and the like exist. In view of the above problems, there is a need for a mechanized sand pack that does not require manual field operation.

Disclosure of Invention

The invention aims to provide an electric arc furnace sand filling device which is high in efficiency, safe and reliable and does not need manual field operation aiming at the defects of the prior art.

The technical scheme adopted by the invention is as follows: an electric arc furnace sand filling device comprises a swing cylinder, a supporting arm, a sand hopper and an opening and closing mechanism, wherein the swing cylinder is installed on a furnace shell, a driving end of the swing cylinder is connected with the upper end of a swing pin, and the swing pin is connected with a supporting steel plate extending out of the furnace shell; one end of the supporting arm is fixedly connected with the oscillating pin, the other end of the supporting arm is fixed with the outer wall of the sand hopper, and the oscillating cylinder can drive the supporting arm and the sand hopper to rotate around the center of the oscillating pin through the oscillating pin, so that the sand hopper can be freely switched between a working position and a sand loading position; and a sand filling channel is arranged in the sand hopper, and an opening and closing mechanism for controlling the opening and closing of the sand filling channel is arranged at the lower end of the sand filling channel.

According to the scheme, the opening and closing mechanism comprises two baffles, two fork-shaped heads and a double-rod cylinder, and the plate surface direction of the baffles is vertical to the axis direction of the sand hopper; the lower port of the sand filling channel can be completely plugged after the two baffles are spliced; the tail part of each baffle corresponds to one end of the connecting fork-shaped head, the two baffle plates form a semi-scissor type structure, the middle parts of the two semi-scissor type structures are hinged through a center pin, the center pin is arranged in a pin cylinder, and the pin cylinder is arranged on the outer side of the sand hopper; two piston rods of the double-rod cylinder are arranged in a back-to-back manner and are respectively connected with the two fork-shaped heads; when the two driving rods of the double-rod cylinder move in the opposite direction/back direction to drive the outer ends of the two fork-shaped heads to move in the opposite direction/back direction, the two baffles are spliced to block the lower end opening of the sand hopper; otherwise, the two baffles are separated, and the lower port of the sand hopper is opened.

According to the scheme, the baffle plates can be of a semicircular structure, and the two baffle plates can be spliced to form the lower end of the circular plate plugging sand filling channel.

According to the scheme, the middle part of the double-rod cylinder is provided with the guide pin, the guide pin can slide back and forth along the guide groove arranged on the guide frame, and the guide frame is fixedly arranged on the pin barrel.

According to the scheme, the lower part of the sand hopper is provided with a slot along the radial direction, and the two baffles can be spliced or separated in the slot; the pin cylinder is arranged on one side of the slot.

According to the scheme, a shaft sleeve is designed between the swing pin and the supporting steel plate.

According to the scheme, the sand hopper comprises a cylindrical upper section part and a funnel-type lower section part; the opening and closing mechanism is mounted on the lower section part.

The invention has the beneficial effects that:

1. the sand filling device is flexible and controllable in operation, unmanned operation in the sand filling process can be realized, and the working efficiency is greatly improved; moreover, the sand filling device can avoid high-risk operation of workers under severe conditions, so that the labor cost is saved, and the sand filling device is safe and reliable; the sand filling device has the advantages of simple and practical structure, smooth and stable equipment operation, and flexible and reliable operation.

2. According to the sand filling device, the guide pin is arranged in the middle of the double-rod cylinder, the guide pin is limited in the guide groove frame to slide, so that two baffles can be prevented from rotating in the same direction to block a magnesia falling channel, and the size of a gap between the two baffles can be adjusted by controlling the stroke of the double-rod cylinder, so that the aim of controlling the falling flow of magnesia is fulfilled; in addition, the design of the guide pin can also avoid the double-rod cylinder from swinging left and right when the two piston rods extend or shorten.

3. The shaft sleeve is arranged between the oscillating pin and the supporting steel plate on the furnace shell, so that the abrasion of the oscillating pin can be effectively reduced, and the service life is prolonged.

Drawings

Fig. 1 is a schematic view of the positional arrangement of the present embodiment.

Fig. 2 is a schematic structural diagram of an embodiment of the present invention.

Fig. 3 is a front view of the present embodiment.

Fig. 4 is a partially enlarged view of a portion a in fig. 2.

Fig. 5 is a sectional view taken along line B-B in fig. 3.

Fig. 6 is a schematic position diagram of the present embodiment.

Wherein: 1. a furnace shell; 2. a swing cylinder; 3. a support arm; 4. a sand hopper; 5. a baffle plate; 6. a double-rod cylinder; 7. a guide pin; 8. A guide frame; 9. a center pin; 10. a pin barrel; 11. a shaft sleeve; 12. a forked head; 13. a swing pin; 14. filling a sand opening; 15. a sand-filling opening cover; 16. a tapping channel; 17. a steel tapping hole; 18. a support steel plate; 19. a sand-filling channel; 20. a slot.

Detailed Description

For a better understanding of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings.

As shown in FIG. 1, an electric arc furnace sand-filling device is installed right above a sand-filling opening 14 of an eccentric area of a furnace shell 1; a sand filling port 14 for filling magnesia is designed on the water cooling plate at the upper part of the eccentric area of the furnace shell 1, and the sand filling port 14 is covered by a sand filling port cover 15 under a general state, so that heat in the furnace is prevented from being dissipated and external air is prevented from entering the furnace. The area of the sand-filled hole 14 facing vertically downwards is a steel-tapping channel 16, a steel-tapping hole 17 is designed at the bottom of the eccentric bottom furnace shell 1, and the molten steel reaching the smelting standard flows out from the steel-tapping hole 17.

As shown in fig. 2 and fig. 3, the sand filling device for the electric arc furnace comprises a swing cylinder 2, a support arm 3, a sand hopper 4 and an opening and closing mechanism, wherein the swing cylinder 2 is installed on a furnace shell 1, the driving end of the swing cylinder 2 is connected with the upper end of a swing pin 13, and the swing pin 13 is connected with a support steel plate 18 extending from the furnace shell 1; one end of the supporting arm 3 is fixedly connected with the swinging pin 13, the other end of the supporting arm 3 is fixed with the outer wall of the sand hopper 4 (a reinforcing plate is arranged at the joint of the supporting arm and the swinging pin 13), and the swinging cylinder 2 can drive the supporting arm 3 and the sand hopper 4 to rotate around the center of the swinging pin 13 through the swinging pin 13, so that the sand hopper 4 can be freely switched between a working position and a sand loading position; the sand hopper 4 is internally provided with a sand filling channel 19, and the lower end of the sand filling channel 19 is provided with an opening and closing mechanism for controlling the opening and closing of the sand filling channel 19.

Preferably, as shown in fig. 4 and 5, the opening and closing mechanism comprises two baffles 5, two fork-shaped heads 12 and a double-rod cylinder 6, wherein the plate surface direction of the baffles 5 is vertical to the axial direction of the sand hopper 4; the lower port of the sand filling channel 19 can be completely plugged after the two baffles 5 are spliced; the tail part of each baffle 5 is correspondingly connected with one end of a fork-shaped head 12, the two baffle plates form a semi-scissor type structure, the middle parts of the two semi-scissor type structures are hinged through a central pin 9, the central pin 9 is arranged in a pin cylinder 10, and the pin cylinder 10 is arranged on the outer side of the sand hopper 4; the two piston rods of the double-rod cylinder 6 are arranged in a back direction, and the two piston rods are respectively connected with the two fork-shaped heads 12; when the two driving rods of the double-rod cylinder 6 move in the opposite direction/back direction to drive the outer ends of the two fork-shaped heads 12 to move in the opposite direction/back direction, the two baffle plates 5 are spliced to block the lower end opening of the sand hopper 4; otherwise, the two baffles 5 are separated, and the lower port of the sand hopper 4 is opened. In the invention, the connection mode among the two baffles 5, the two fork-shaped heads 12 and the double-rod cylinder 6 can be, but is not limited to, the above situation, as long as the two baffles 5 can move oppositely to split and block the sand-filling channel 19 under the action of the double-rod cylinder 6, and the two baffles 5 can move away from each other to separate and open the sand-filling channel 19. In this embodiment, the baffle 5 may have a semicircular structure, and two baffles 5 may be combined to form a circular plate for blocking the lower end of the sand-filling channel 19.

Preferably, the middle part of the double-rod cylinder 6 is provided with a guide pin 7, the guide pin 7 can slide back and forth along a guide groove arranged on a guide frame 8, and the guide frame 8 is fixedly arranged on a pin barrel 10. When the baffle 5 rotates, because the tail end of the baffle 5 does circular motion, the double-rod cylinder 6 can have horizontal displacement, in order to prevent the double-rod cylinder 6 from swinging left and right when driven, the guide pin 7 can ensure that the two baffles 5 can not rotate in the same direction, ensure that the sand filling channel 19 can be smoothly opened, and simultaneously, by controlling the stroke of the double-rod cylinder 6, the size of the gap between the two baffles 5 can be adjusted, so as to achieve the purpose of controlling the falling flow of the magnesia.

Preferably, a slot 20 is arranged at the lower part of the sand hopper 4 along the radial direction, and the two baffle plates 5 can be spliced or separated in the slot 20; the pin cylinder 10 is provided at one side of the slot 20.

Preferably, to prevent excessive wear, a bushing 11 is designed between the pivot pin 13 and the support steel plate 18.

Preferably, the sand hopper 4 comprises a cylindrical upper section and a funnel-shaped lower section; the opening and closing mechanism is mounted on the lower section part.

The working principle of the invention is as follows: after each tapping, the tapping channel 16 needs to be plugged by magnesia, and the tapping hole 17 is plugged by an eccentric bottom tapping device; since the molten steel temperature is high, in order to protect the eccentric bottom tapping device from burning, it is necessary to fill the upper portion of the tapping hole 17 with magnesia. When sand filling is needed, the sand filling opening cover 15 is opened, the sand filling device needs to swing from a sand filling position to a working position (as shown in fig. 6), at the moment, the swing cylinder 2 acts after receiving a sand filling command, and the support arm 3 is driven to drive the sand hopper 4 and the opening and closing mechanism at the lower part of the sand hopper to swing to the working position together; then, the double-rod cylinder 6 acts, piston rods at two ends extend out in a back direction to drive the forked head 12 to move in a back direction, the baffle plates 5 connected with the forked head 12 rotate around the central pin 9, the two baffle plates 5 are changed into a separation state (a gap is formed between the two baffle plates) from the splicing state, magnesia in the sand hopper 4 is scattered from the gap between the two baffle plates 5 under the action of gravity, and the magnesia falls into a steel tapping channel 16 at the upper part of the steel tapping hole 17 through the sand filling hole 14 to fill the channel. After the steel tapping channel 16 is filled, the double-rod cylinder 6 reversely moves, the two baffle plates 5 move towards the center of the sand filling channel 19 of the sand hopper 4 and are spliced to block the sand filling channel, then the swing cylinder 2 moves to drive the sand hopper 4 to return to a sand filling position, sand is automatically filled into the sand hopper by the sand filling mechanism, and the steel tapping hole 17 is prepared to be filled and blocked next time.

It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that modifications can be made to the technical solutions described in the above-mentioned embodiments, or equivalent substitutions of some technical features, but any modifications, equivalents, improvements and the like within the spirit and principle of the present invention shall be included in the protection scope of the present invention.