RU2373289C1 - Spout for pouring liquid metal - Google Patents

Abstract

FIELD: metallurgy industry.

SUBSTANCE: device refers to metallurgy industry and can be used for pouring liquid metal. Device includes stationary pouring nozzle, turning bowl with a nozzle, rotary lined spout for pouring liquid metal. Spout is made of three cone-shaped sections connected with bolts and winged nut and installed together with a drive on a trolley with racks and hinged turning wheels, which are adjusted as to height, which allow the spout for pouring liquid metal to be turned at an angle of 120° and to change its height. Turning bowl with a nozzle has a metal housing with lining. Shaft supported with the support ball located in lower part of the tube with bottom is welded to metal housing from below. Tube is welded to the channel in a vertical plane thus providing the possibility of turning the bowl through 120° about its axis.

EFFECT: enlarging coverage area of spout and increasing its resistance.

6 cl, 10 dwg

Description

A device for casting liquid metal relates to ferrous metallurgy and can be used in blast furnace production, steelmaking furnaces, as well as in shaft and shaft furnaces designed for melting non-ferrous metals and alloys. A known analogue is a device for casting liquid metal (source of information AS No. 1152964). In figure 1. schematically shows a device for casting liquid metal; figure 2 is the same, a longitudinal section; figure 3 - the location of the roller clips on the bracket.

A device for casting molten metal consists of a trough 1, a lined bath with two mutually perpendicular socks, mounted in a cradle 2, supported by an arm 3 through roller cages 4 on a drive eccentric disk 5, through a rim 6, mounted on the shaft of the gearbox 7. Rotation is provided by an electric motor 8 . Casting is carried out in the bucket 9.

When the motor 8 is turned on, the eccentric disk 5 with the rim 6 starts to rotate, changing the position of the roller cages 4 relative to the supports of the cradle 10. As a result, the cradle 10 with the trough can be tilted to the required angle, which allows casting either to one of the ladles or simultaneously to two ladles.

So, as in the claimed device, there is a drive consisting of an electric motor 8, gear 7, which provides rotation at a certain angle of the gutter 1.

The disadvantages are that:

- the device is relatively complex;

- the chute can rotate around the axis only at a certain angle, which ensures the discharge of molten metal into ladles;

- the open design of the gutter leads to strong thermal radiation to the staff;

- poor working conditions for staff due to gas emissions during the release of molten metal;

- low durability of the lining.

Of the known closest in technical essence (prototype) is the device (AS No. 1285002).

Figure 4 shows a device with a rotating trough; figure 5 is a section aa.

The rotating chute 1 is made in a Z-shape, the drain socks 11 and 12 are oppositely directed and perpendicular to the channel 13 connecting them to the receiving funnel 14, a 5 ° slope is made towards the drain sock 12. The welded frame 15 of the rotating chute 1 at one end is mounted on the pin 16, the axis of which is located on the axis passing through the center of gravity of the chute. At the base of the gutter, a treadmill 17 is made, with which the gutter rests on a self-centering balancing support 18. The gutter is connected to the drive: an electric motor 8, a gearbox 7, for example, by means of a crank mechanism 19.

The rotating chute 1 is installed perpendicular to the access roads 20 and 21 and is supported by the base on the platform 22 mounted on the supports 23 and 24, and the pin 16 on the column 25 (figure 5). The gutter 1 is installed under the stationary drain toe 26 (figure 5). Under the drain socks 11 and 12 on the tracks 20 and 21, cast-iron ladles 27 and 28 are installed during casting.

The operation of the device is as follows.

Before casting, the Z-shaped gutter using an electric motor 8 and gearbox 7, the crank mechanism 19, rotates, rotates 15 ° around the horizontal axis, on which there is the center of gravity of the gutter with the melt and the axis of the pin 16. At this time, the melt stream, supplied from the stationary sock 26, enters the receiving funnel 14. In the first case, the melt from the receiving funnel 14 immediately through the drain sock 11 enters the bucket 27, which stands in the way 20. When it is filled, the drive is turned on and the chute rotates around its horizontal axis by 30 ° in with the toe of the drain sock 12. In this case, the melt stream from the receiving funnel 14 enters the channel 13, which has a 5 ° slope towards the drain sock 12, and from the channel 13 through the drain sock 12 the melt enters the ladle 28, which stands in the path 21.

The welded frame 15 of the rotating chute 1 has a treadmill 17 at its base, which is made around the circumference, and when the chute 1 is rotated by a drive consisting of an electric motor 8, a gearbox 7, a crank mechanism 19 in one or the other direction, it is rolled around on the rollers of a self-centering balancing support 18 installed on the platform 22, which is mounted on the supports 23 and 24.

During filling of the ladle 28, the train standing on the path 21 moves and an empty ladle is placed under casting. After filling the bucket 28, the trough rotates in the opposite direction to fill the bucket 27, standing in the way 20, etc. To drain the cast iron from the receiving funnel, the gutter is turned another 15-20 °. After the final discharge of cast iron, the gutter is set to its original position, i.e. gutter socks set horizontally. And in this position, the trough is until the next casting. After which the cycle repeats. As in the claimed device, the prototype contains a rotating lined chute connected to the drive, and a stationary drain toe.

The disadvantage is that:

- the chute can rotate around the axis only at a certain angle, which makes it possible to drain molten metal into a ladle;

- poor working conditions for the pourer due to the thermal radiation of the molten metal and gases released during the casting;

- limited service area for the chute during casting (the ability to fill only ladles located on parallel tracks);

- design complexity;

- insufficient thermal insulation of the welded frame from molten metal;

- low durability of the lining.

The objective of the invention is to improve the working conditions of staff, increase the lining resistance, improve the thermal insulation of the metal structure of the gutter from molten metal, increase the service area of the gutter (for example, pouring molten metal into a conveyor, carousel, ladle located in the pouring sector).

This is achieved by the fact that in the device for casting liquid metal containing a rotating lined chute connected to the drive and a stationary drain sock, according to the invention, a rotary bowl with a toe mounted on the channel coaxially to the rotating chute is introduced, the rotary bowl has a metal case with a lining and with a heat-insulating layer under it, a shaft is welded from below to the metal casing of the indicated bowl, resting on a support ball located in the lower part of the pipe with a bottom vertically welded to the seam Ller, with the possibility of rotation of the rotary bowl by an angle of 120 ° around its axis, while at the end of the shaft a selection was made in the form of a segment with a radius equal to the radius of the supporting ball, with the possibility of turning it around its axis by an angle of 120 °.

The introduction of a swivel bowl with a toe into the design of a device for casting liquid metal makes it possible to rotate a trough rotating at an angle of 120 °, increasing its service area, i.e. without readjustment, for example, pour molten metal into a casting conveyor, carousel, ladle.

In addition, thanks to the support ball, the swivel bowl with the toe can very easily rotate around the axis, thereby facilitating the work of the staff.

At the same time, the rotating chute is made of three sections telescopically connected with the possibility of rotation around their own axis, while each section of the chute has a metal casing with a lining and a heat-insulating layer under it. The first and third sections of the rotating chute are equipped with rims welded to the metal casing, supported on road wheels, which ensure the rotation of these sections around its own axis.

Further, the axis of rotation of the gutter is inclined to the horizontal axis at an angle of 6 °, and sections of the rotating gutter are fastened together by bolts and wing nuts and have an inner annular protrusion. The closed design of the chute for casting liquid metal dramatically reduces heat loss and gas emissions during casting. These factors lead to improved working conditions for staff. This design solution of the chute for casting liquid metal creates periodic contact of the entire inner lining of the chute with molten metal. The lining wears out gradually, evenly over the entire inner surface, its resistance increases.

It should be noted that the drive contains a coupling, a gear, which engages with a gear ring, rigidly fixed to the middle section of the rotating trough.

In addition, the rotating chute is placed on a trolley with articulated-rotary rollers with the possibility of rotation of the chute by 120 ° and docking with the tip of the turntable.

Moreover, the trolley has four racks made with the possibility of adjusting them in height with screws, and two thrust screws.

The introduction of new elements and the relationships between them provides a solution to the problem.

Figure 6 is a top view (in plan) of the proposed device;

figure 7 - the proposed device in the context of aa;

in Fig.8 is a section bB;

figure 9 - remote element B;

figure 10 - remote element G.

The present invention consists of a stationary toe 26, a rotary bowl with a toe 29, a rotating chute 1, which consists of 3 cone-shaped sections interconnected by four bolts 30 and four wing nuts 31. The rotating chute 1 with a rotation drive consisting of an electric motor 8, the coupling 32, the gear 7, the ring gear 33, the gear wheel 34, is located on the trolley 35, which moves on the articulated-rotary rollers 36.

On the wide part of each cone-shaped section of the rotating groove 1 there is an inner annular protrusion. An annular protrusion prevents molten metal from entering the joint between the sections. Assembly of the rotating chute 1 can be carried out directly at the place of casting by maintenance personnel.

The section of the rotating chute 1 has a metal casing 37, the inner surface of which has a heat-insulating layer 38 and a lining 39.

The middle section has a ring gear 33, which engages with the gear wheel 34.

Each end section has a rim 40 that rests on two road wheels 41.

The assembled rotating chute 1 has an axis of rotation, the angle of inclination of which with the horizontal axis is 6 °. The design of the telescopic rotating chute 1 is closed, which can significantly reduce heat loss and prevent the release of gases along the entire length of the chute, thereby improving the working conditions of staff.

The rotating groove 1 rotates at a speed of 6 rpm, during rotation, the molten metal contacts the outer surface of the lining, which wears out uniformly, gradually. The durability of the lining increases due to the constant heat flux throughout its volume. It is significant to note that when the trough 1 is rotated, an optimal operating mode of the lining is created. On the first and second sections (counting from left to right) there are four welded brackets with grooves for bolts 30 to enter into them.

At the wide ends of the second and third sections there are four welded brackets with axes in which the threaded bolts 30 rotate, the wing nuts 31 are screwed at the ends of the latter.

The rotating chute 1 is placed on the trolley 35, which can rotate it through an angle of 120 °. The trolley 35 has four racks 42, in the lower part of which the pivoting rollers 36 are fixed. On the trolley 35 there is a frame 43 for fastening the electric motor 8. The racks 42 can be height-adjustable with screws 44. The trolley 35 has two stop screws 45 for fixing it during castings from a weld metal furnace. A drive consisting of an electric motor 8, a coupling sleeve 32, a gearbox 7 and a gear wheel 34 is mounted on the plate 46 of the trolley 35. The plate 46 is mounted on racks 42 and has four handles designed for manual transportation of the trolley 35. It is important to note that the rotation of the trolley 35 s the rotating chute 1 mounted on it at a certain angle to the casting place is made simultaneously with the rotation of the rotary bowl with the toe 29. Thus, it is possible to fill the casting equipment with molten metal in turn: p oil conveyor 48, carousel 49, ladle 50 installed in the reachable casting sector.

Successive casting of deposited metal is easy without any readjustment of equipment.

The inclusion in the composition of the device for pouring liquid metal trolleys 35 on wheels increases the service area, facilitates the work of staff.

The rotary bowl with the toe 29 is mounted on the channel 51, which is welded to two brackets 52. The brackets 52, in turn, are welded to the frame of the melting furnace. A pipe 53 with a bottom is welded to the channel 51 strictly vertically, with a support ball 54 placed in its lower part. A shaft 55 hardened in the lower part is mounted on the support ball 54. The shaft 55 at the end has a segment sample with a radius equal to the radius of the support ball 54. The shaft 55 and the support ball 54 are lubricated with CIATIM 201 grease. This design solution makes it very easy for maintenance personnel to rotate the swivel bowl welded to the upper end of the shaft 29 .

The turntable with the toe 29 has two handles 56 that allow maintenance personnel to rotate it from either side. The metal housing 57 of the rotary bowl with the toe 29 is made integral with the toe and has a heat-insulating layer 58 inside, which reduces the heat loss of the metal poured into it. The turntable 29 has a lining 59.

When assembling a device for casting liquid metal, as well as casting deposited metal, the tip of the rotary bowl 29 should enter the wide part of the trough 1 of the device for casting liquid metal. During casting, molten metal flows through a notch 60 and enters a stationary drain sock 26. In the assembled state, the rotating chute 1 by the rims 40 is supported by track rollers 41, which rotate in axles 61, mounted on brackets 62.

A device for pouring liquid metal as follows.

Before starting work, the rotary cup with the toe 29 is lined and calcined. Next, three sections of the rotating trough 1 are lined and calcined by portable torches, which are then telescopically articulated, i.e. the narrow section is inserted into the wide of another section. The sections are fastened with bolts 30 and wing nuts 31. The fastened sections are mounted on four track rollers 41 mounted on the plate 46 of the trolley 35, while the gear wheel 34 is engaged with the ring gear 33. The assembled rotating chute 1 on the trolley 35 is transported and the wide part is joined with the toe of the rotary bowl 29. The center of the rotary bowl with the toe 29 should be aligned with the center of the assembled chute for casting liquid metal (Fig.6). A rotary bowl with a toe 29 and a docked chute for pouring molten metal 1 is brought, for example, to the first casting place — a casting conveyor 48. The cart 35 is fixed with two stop screws 45 during casting of molten metal from the furnace. The rotation drive of the chute for pouring liquid metal is turned on, the notch 60 is opened and the metal enters through it into the stationary drain sock 26, then fills the rotary bowl with the toe 29 and then enters the rotating chute 1. Passing the rotating chute 1 of the device for pouring liquid metal, molten metal fills the molds located on the casting conveyor 48. After casting the molten metal into the molds of the casting conveyor 48 by the maintenance personnel, the tap hole 60 closes. The trolley 35 is unlocked with the stop screws 45 and the rotary bowl with the toe 29 together with the groove 1 docked with it rotates to the casting site 49. The trolley 35 is fixed with the stop screws 45, the notch 60 opens and the carousel molds 49 are filled with molten metal. At the end of casting, the weld metal 49 of the carousel molds, the 49-year-old 60 is closed, the rotary bowl with the toe 29 is turned at a certain angle and the rotating trough 1 connected to it to the casting site in the ladle 50, and then the process is repeated.

The proposed device for casting liquid metal improves the working conditions of staff, increases the lining resistance, improves the thermal insulation of the metal of the rotating chute from the action of molten metal, increases the service area of the chute (it is possible to cast molten metal in a furnace in the 120 ° sector).

Claims (6)

1. A device for casting liquid metal, containing a rotating lined chute connected to the drive, and a stationary drain sock, characterized in that the device is equipped with a rotary bowl with a toe mounted on a channel coaxially with the rotating chute, the rotary bowl has a metal body with a lining and a heat-insulating layer beneath it, from the bottom to the metal casing of the indicated bowl, a shaft is welded resting on a support ball located in the lower part of the pipe with a bottom vertically welded to the channel, with the possibility of the rotation of the rotary bowl by an angle of 120 ° around its axis, while at the end of the shaft a selection was made in the form of a segment with a radius equal to the radius of the supporting ball, with the possibility of turning it around its axis by an angle of 120 °, and the rotating trough is placed on a trolley with articulated-rotary rollers with the possibility of rotation of the gutter by 120 ° and docking with the tip of the rotary bowl and made of three telescopically connected sections with the possibility of rotation around their own axis, with each section of the gutter has a metal a casing with a lining and a heat-insulating layer under it. 2. The device according to claim 1, characterized in that the first and third sections of the rotating trough are provided with rims welded to the metal casing, supported on road wheels, which ensure rotation of these sections around its own axis. 3. The device according to claim 1, characterized in that the axis of rotation of the gutter is inclined to the horizontal axis at an angle of 6 °. 4. The device according to claim 1, characterized in that the sections of the rotating trough are fastened together by bolts and wing nuts and have an inner annular protrusion. 5. The device according to claim 1, characterized in that the drive comprises a connecting sleeve, a gear wheel engaged with a gear ring fixed to the middle section of the rotating trough. 6. The device according to claim 1, characterized in that the trolley has four racks made with the possibility of adjusting them in height with screws, and two thrust screws.

Images