RU2355773C2 - Tray-type dispatch device of furnace mouth with synchronous device - Google Patents

Abstract

FIELD: metallurgy.

SUBSTANCE: current invention relates to metallurgy, particularly to feeding assembly of blast furnace. Facility contains installed in chamber two parallel shafts with four driving lever, encapsulating facility, revolving hose, tray, crankshaft, pin, tractive hoop. Two driving levers are affixed to the one shaft and two other driving levers - to the other shaft. By means of four hanging points of coupling bars they are connected to tractive hoop. Due to connection of four driving levers, coupling bars and tractive hoop it is provided movement up-down and alternate motion of tractive hoop. Due to application of four coupling bars, driving tractive hoop, it is not declining during the movement up and down. Usual compaction is added by floating encapsulating magnetic ring, that provides essential increasing of facility hermeticity.

EFFECT: new structure of tray-type dispatch device.

5 cl, 3 dwg

Description

FIELD OF TECHNOLOGY

The invention relates to a trough switchgear, in particular to a coneless top of a blast furnace with a trough switchgear.

BACKGROUND

The trough switchgear serves to load the blast furnace. Currently, there are several known ways to control the trough switchgear, namely: by changing the rotation speed of the planetary gear, using hydraulics, various types of chain or mechanical drive. These switchgears are capable of flexible and uniform distribution, have high reliability and compact design in comparison with earlier samples of this type. Since its inception, they have become widespread in blast furnaces. However, they all have disadvantages. A distribution and drive device that uses a change in the speed of rotation of the planetary gear differs in the complexity of the design and high production and operating costs, as well as maintenance costs. The hydraulic power distribution unit is characterized by a bulky design with high installation costs and operating costs. The cable management option is characterized by reliability problems caused by twisting and abrasion. The control option using a single mechanical lever has a simple design, but its guide is usually worn and torn on one side, which reduces the control accuracy due to the radial force arising in the traction hoop when lifting, because lifting is carried out by a single lever at two points. In addition, all of these devices are not tight enough.

SUMMARY OF THE INVENTION

The aim of the present invention is to overcome the disadvantages of the known devices of the tray distribution device of the top of the blast furnace and the creation of a distribution device having a more rational design, not creating radial force when lifting, not leading to wear and tear on one side of the guide, having a small size and small height and good sealing.

The following discloses a technical solution to the above task, in accordance with the present invention.

The blast furnace top opener tray dispenser in accordance with the present invention includes a sealed cylindrical casing consisting of a chamber, water-cooled pan and top cover. The output gear of the gearbox, mounted on the top cover, engages with the upper rotation bearing having external teeth mounted in the internal upper cover so that the rotating sleeve connected to the upper rotation bearing is driven and rotated. The tray is located at the bottom of the rotating sleeve and connected to it from two sides by means of pins, which ensures rotation of the tray. The gearbox, located outside the camera, drives two shafts, forcing them to rotate synchronously in opposite or reverse directions. Four drive shoulders, respectively, are connected to the four shafts of the traction hoop by connecting rods. The contact rollers attached to the traction hoop interact with an anti-rotation sliding guide mounted on the inner wall of the chamber, thereby providing up-down and reciprocating motion. The traction hoop is connected to the outer ring of the lower rotation bearing. A block of adjusting wheels is placed on the inner ring of the lower rotation bearing. Adjusting wheels interact with a vertical tray on the outer wall of the rotating sleeve, providing synchronous rotational movement of the lower rotation bearing and the rotating sleeve. The trunnions connected to the tray are connected to the crank. At the other end of each crank, a roller is made interacting with an elongated groove existing in the frame of the inner ring of the lower rotation bearing. The reciprocating movement of the traction hoop up and down ensures the tipping of the tray. Therefore, the tray can either just rotate, or only tip over, or tip over and rotate at the same time. Additionally, a distribution at a given point, a fan distribution, a single-ring distribution, and a multi-ring distribution can be implemented.

A seal holder is provided adjacent to the outer cylindrical surface of the water-cooled tray. The gap between the outer cylindrical surface of the seal holder and the inner cylindrical surface of the cover of the hydraulic seal of the rotating sleeve is sealed with three elastic sealing rings in the middle of the seal holder. Sealing the area between the upper end of the seal holder and the upper surface of the cover of the hydraulic seal of the rotating sleeve is carried out by means of two sealing rings, the first ring is a gas insulating ring curtain of nitrogen, and the second is a floating magnetic sealing ring. Further, on the inner and outer cylindrical surfaces of the seal holder, two annular grooves are filled with an asbestos seal. The seal holder has an engine oil channel and an oil hole in communication with the annular grooves.

The present invention provides the following advantages:

tipping the tray is implemented using a motor reducer mounted outside the casing and causing the two shafts to simultaneously rotate in opposite or opposite directions, and a four-point articulation of the connecting rods and the traction hoop by means of drive shoulders. Due to the use of a symmetrical drive with two shafts, the radial forces created by the movement of the traction hoop up and down can balance each other. In addition, due to the fact that the four connecting rods guide the traction hoop, it does not deviate when moving up and down. In addition, since a pair of rotating wheels is excluded, the height of the device can be significantly reduced, which increases stability during operation. Due to the fact that the usual labyrinth and elastic seals are supplemented with a floating magnetic sealing ring, a single combined seal is created in which there is a gas insulating ring curtain of nitrogen and a floating magnetic seal. In this regard, the sealing properties are significantly improved, nitrogen consumption is significantly reduced, and the service life of the device is increased.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 shows the construction according to the present invention;

figure 2 shows a top view of the structure shown in figure 1;

figure 3 shows the design of the sealing unit.

SPECIFIC EMBODIMENTS OF THE INVENTION

As can be seen from Figs. 1 and 2, the construction according to the present invention includes a chamber 2 and a sealed cylindrical casing, consisting of a water-cooled tray 5 and an upper cover 1. Inside the sealed cylindrical casing, an upper rotation bearing 16, a rotating sleeve 17, a tray 12 are placed , crank 11, frame 9, trunnion 23, traction hoop 6, adjusting wheel block 22, guide 3 and lower rotation bearing 7. The inner ring of the upper rotation bearing 16 has a common center with the feed pipe 19. The inner ring of the upper rotation bearing 16 is connected to the upper cover 1. The outer ring of the upper rotation bearing 16 is connected to the rotating sleeve 17. The outer teeth on the outer ring of the upper rotation bearing 16 are made with the possibility of engagement with the output gear of the gearbox on the top cover 1 to provide a drive for the rotating sleeve 17. The tray 12 for communicating rotation with it is connected to the rotating sleeve 17 by means of pins 23 Two parallel shafts 15 and 20 are placed in the chamber. Four drive arms 21a, 21b, 21c and 21d are attached to the shafts 15 and 20, respectively. Each of the drive arms is connected to the traction hoop 6 by means of a connecting rod 14. The traction hoop 6 is connected to the outer ring of the lower rotation bearing 7. The contact rollers 4 mounted on the traction hoop 6 interact with a vertical guide made on the inner wall of the chamber 2. Block 22 of the adjusting wheels is mounted on the inner ring of the lower rotation bearing 7. Adjusting wheels 13 of block 22 interact with a vertical tray located on the outer wall of the rotating sleeve 17 to ensure synchronous rotation of the inner ring of the lower rotation bearing 7 and the rotating sleeve 17. The pins 23 are connected to the cranks 11. At the other end of each crank 11, a roller interacting with elongated groove available in the frame 9 of the inner ring of the lower rotation bearing 7. A sealing device 18 is made between the inner wall of the rotating sleeve 17 and the outer wall of the supply pipe 19. A sealing device 8 is made between the bottom of the rotating sleeve 17 and the water-cooled tray 5.

In a double-arm traction switchgear with four suspension points according to the present invention, two drive arms 21a, 21b are attached to the shaft 20, and two other drive arms 21c and 21d are attached to the other shaft 15. They are connected via four tie rods 14 suspending the traction hoop 6. The contact rollers 4 located on the traction hoop 6 interact with the anti-rotation guide mounted on the inner wall of the chamber. Tipping the tray occurs due to the fact that the gearbox mounted outside the camera causes both shafts to swing synchronously in opposite or opposite directions, providing up-down movement and reciprocating movement of the traction hoop 6 through the connection of four drive arms 21, the connecting rod 14 and the traction hoop 6. Traction hoop 6 is connected to the outer ring of the lower rotation bearing 7. The inner ring of the lower rotation bearing 7 is connected to the frame 9. The trunnions 23 connected to the tray 12 cooperate by means of the crank 11 with the frame 9 to provide the tipping of the tray 12.

In the lower parts of the outer and inner cylindrical surface of the seal holder 31, a flat annular groove 34 is respectively provided. Two annular grooves are made in the upper end of the seal holder 31. Nitrogen in a gaseous state passes through a nitrogen hole 46 into an internal groove to create a gas insulating annular curtain 45 of nitrogen. A floating magnetic sealing ring 44 is provided in the outer groove. A sealing ring 35 is placed in the inner groove 34. Three deep annular grooves 36 are made in the middle part of the outer cylindrical surface of the seal holder 31. Closing elastic sealing rings 37 are placed in the grooves 36. Oil hole 38, made in the holder 31 of the seal, communicates with the channel 39 of the engine oil located in the water-cooled pan 5.

A floating magnetic sealing ring is a ring element 44 made of cast iron with spherical graphite. Twenty-four holes with a diameter of 10 and a depth of 16 are made in one of its ends with permanent magnets 47 placed therein. At one end of each permanent magnet, a gasket 48 is separated by a magnet. At the other end of each permanent magnet, in the flat upper groove in the cover of the hydraulic seal of the rotating sleeve 17, an annular element 44 made of cast iron with spherical graphite is placed, hold first permanent magnet 47.

Claims (5)

1. Tray double-arm distribution device of the top of a blast furnace with a synchronous drive and four suspension points, containing a sealed cylindrical casing, including the upper bearing (16) of rotation, a rotating sleeve (17), a tray (12), a crank (11), a frame (9) , pins (23), traction hoop (6), block (22) of adjusting wheels, guide (3) and lower rotation bearing (7), the inner ring of the upper rotation bearing (16) being connected to the upper cover (1), the outer ring the upper rotation bearing (16) is connected to the rotating with a sleeve (17), the outer teeth of the outer ring of the upper rotation bearing (16) are engaged with the output gear of the gearbox located on the top cover (1) to ensure rotation of the rotating sleeve (17), the tray (12) is connected to the rotating one on both sides sleeve (17) by means of pins (23), characterized in that it comprises two parallel shafts (15, 20) installed in the chamber with four drive arms (21a, 21b, 21c and 21d) attached to the shafts (15, 20), each drive arm pivotally connected to the traction hoop (6) by connecting flax traction (14), traction hoop (6) connected to the outer ring of the lower rotation bearing (7), contact rollers (4) mounted on the traction hoop (6) and interacting with a vertical guide made on the inner wall of the chamber (2), a block (22) of adjustment wheels attached to the inner ring of the lower rotation bearing (7) and having adjustment wheels (13) interacting with a vertical tray located on the outer wall of the rotating sleeve (17), while the pins (23) are connected to the crank ( 11) having on its other end a roller interacting with an elongated groove made in the frame (9) of the inner ring of the lower rotation bearing (7), there is a sealing device (18) between the inner wall of the rotating sleeve (17) and the outer wall of the supply pipe, and between the lower part of the rotating sleeve (17) ) and a water-cooled tray (5) has a sealing device (8). 2. Tray double-arm distribution device of the top of a blast furnace with a synchronous drive and four suspension points according to claim 1, characterized in that it contains two drive arms (21a, 21b) attached to the shaft (20), and two other drive arms (21c , 21d) - to another shaft (15), while the drive shoulders are connected by means of connecting rods (14) with four points of suspension of the traction hoop (6), contact rollers (4) located on the traction hoop (6) interact with preventing rotation guide mounted on the inside It chamber wall for providing up and down movement and a reciprocating movement of the traction hoop (6), wherein the traction hoop (6) is connected with the outer ring of the lower bearing (7) of rotation. 3. A double-jaw tray distribution device of the top of a blast furnace with a synchronous drive and four suspension points according to any one of claims 1 and 2, characterized in that the said sealing devices (8, 18) contain a seal holder (31) mounted adjacent to the outer cylindrical the surface of the water-cooled tray (5), the seal between the outer cylindrical surface of the seal holder (31) and the inner surface of the cylinder of the hydraulic seal cover of the rotating sleeve (17) it is made in the form of three elastic sealing rings in the middle of the seal holder (31), between the upper end of the seal holder (31) and the upper surface of the cover of the hydraulic seal of the rotating sleeve (17) two sealing rings are made, the first of which is a nitrogen gas insulating ring curtain (45), and the second is a floating magnetic sealing ring, while on the inner and outer cylindrical surfaces of the seal holder (31) there are two annular grooves filled with asbestos by friction, moreover, in the seal holder (31), a machine oil channel (39) and an oil hole (38) communicating with the annular grooves are made. 4. Tray double-arm distribution device of the top of a blast furnace with a synchronous drive and four suspension points according to claim 3, characterized in that in the lower parts of the outer and inner cylindrical surfaces of the seal holder (31), flat ring grooves (34) are made in the upper end of the holder (31) the seals are made of two annular grooves, and nitrogen in the gaseous state enters the internal groove through the hole (46) for nitrogen to create an insulating nitrogen gas ring curtain (45), in the outer groove non-floating magnetic sealing ring (44), a sealing ring (35) is placed in the internal groove (34), three deep annular grooves (36) with locking elastic sealing rings (37) placed in them are provided in the middle part of the outer cylindrical surface of the seal holder 31 , an oil hole (38) made in the seal holder 31 is in communication with a machine oil channel (39) made in a water-cooled sump (5). 5. A double-jaw tray distribution device of the top of a blast furnace with a synchronous drive and four suspension points according to claim 3, characterized in that the floating magnetic sealing ring is an annular element made of cast iron with spherical graphite (44), twenty of which have twenty four holes with a diameter of 10 and a depth of 16 with permanent magnets (47) placed in them, with a spacer (48) separated by a magnet installed on one end of each permanent magnet, and on the other end a permanent magnet in a groove in the flat upper cover of the rotary fluid seal sleeve (17) is placed is made of cast iron with spheroidal graphite ring member (44) retained by a permanent magnet (47).

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