Title of Invention

SYNCHRODRIVE BLAST FURNACE TOP CHUTE DISTRIBUTING DEVICE

Abstract

This Invention belongs to the technical field of blast furnace non-gas-seal bell. Two driving arms are fixed to the revolution axis, and the other two driving arms are fi~d to the other revolution axis. They are connected through the four suspending points of the connecting rods with the towing loop. It forms the up and down and reciprocating movement of the towing loop through the connection of the four driving arms, the connecting rods and the towing loop. The floating magnetic sealing ring is a nodular graphite cast-iron ring-shaped part. On one of its end faces, the deep holes are provided, in which permanent magnets are placed. On one end face of each permanent magnet, magnet-partitioned pads are attached. On the other end face, the nodular graphite cast-iron ring-shaped part is absorbingly attached with the permanent magnet in the upper flat slot in the water-sealing cover of the rotating sleeve. As a symmetrical drive with double revolution axes is adopted, the radial forces produced in the up and down movement of the towing loop could counterweigh each other. And as the four connecting rods drive the towing loop, the towing loop could not deflect in the up and down movement of the towing loop. A floating magnetic sealing ring is added on the basis of the current seal, thus the sealing performance is greatly enhanced.

Full Text

Field of the invention The invention relates to a chute distributing device, particularly to the bell less top in blast furnace having a chute distributing device. Background of the invention Chute distributing system is a charging device of blast furnace. There are now several driving forms of chute distributing device, such as planet gear speed difference, hydraulic pressure, chain or mechanical drive forms. These distributing devices can make flexible and well-proportioned distribution and have reliable performance and compact structure in comparison with the past devices of the same type. Once they came into the world, they have been widely introduced in blast furnaces. But shortcomings exist in all of them. For a planet speed difference drive-distributing device, it has a complicated structure with high manufacturing, operating and maintenance costs. For a hydraulic pressure drive-distributing device, it has an enormous equipment system with high installation and operation costs. For a cable drive form, the non-robustness problems caused by twining and abrasion exist. For a mechanical single lever drive form, it has a simple structure, however, its raceway always be worn and torn on a single side and thus the control precision is decreased because a radial force emerges in the towing loop in lifting motion as it is hoisted by two points with a single lever. Further, the hermetization effects of all the above devices are not sufficient. Summary of the invention The objects of the invention is to overcome the shortcomings in the prior art and provides a blast furnace top chute distributing device that has more reasonable structure, produces no radial force in lifting motion, causes no single side of an orbit worn and torn, has small size and low height, and with good hermetization effect. The technical solution of the invention for solving the above-mentioned technical problems is provided as follows: The blast furnace top chute distributing device of the invention comprises a hermetical cylinder casing comprising a cabinet, a water-cooling dish and a top cover. An output gear of a motor speed reduction unit fixed to the top cover engages an upper swing bearing having external teeth fixed in the internal top cover, thus a rotating sleeve fixed with the upper swing bearing is driven and rotated. A chute is positioned in the lower part of the rotating sleeve and is connected with the rotating sleeve through trunnions on its both sides, thus the rotation of the chute is achieved. The motor speed reducing unit on the outside of the cabinet drives the two revolution axes to swing synchronously in opposite or reverse directions. Four driving arms are provided respectively on the two revolution axes and articulated with four suspending points of the towing loop through connecting rods. Contact rollers fixed to the towing loop are coordinated with an anti-rotating sliding guide provided on the inner wall of the cabinet, thus the up and down and reciprocating movement is achieved. The towing loop is fixed and connected with the outer ring of the lower swing bearing. A thumb wheel unit is provided on the inner ring of the lower swing bearing. The thumb wheels on the thumb wheel unit coordinates with a vertical chute on the outside wall of the rotating sleeve, forming a synchronous rotating movement of the lower swing bearing and the rotating sleeve. The trunnions connected with the chute are respectively fixed and connected with cranks. On the other end of each crank, a pulley is provided and coordinated with a bar-shaped notch provided on the skeleton frame of the inner ring of the lower swing bearing. Through the up and down reciprocating movement of the towing loop, the object of dumping motion of the chute is achieved. Therefore, the chute can complete rotating movement only, dumping only, or rotating while dumping. Further, Fixed-point distribution, fanwise distribution, single ring distribution and multi ring distribution can all be realized. A seal receptacle is provided with interference on the outside cylinder surface of the water-cooling dish. Between the outside cylinder surface of the seal receptacle and the inner cylinder surface of the water-seal cover of the rotating sleeve, it is interference sealed by three elastic sealing rings in the middle part of the seal receptacle. Between the upper end face of the seal receptacle and the upper surface of the water-seal cover of the rotating sleeve, it is sealed through two sealing rings, the first ring is a nitrogen gas annular curtain sealing, and the second is a floating magnetic sealing ring. Further, two annular notches are provided on either the inside and outside surfaces of the seal receptacle cylinder, in which asbestos packing set is placed. On the seal receptacle, a lube oil duct and an oil hole communicating with the annular notches are provided. The beneficial effects of this invention are: the dumping motion of the chute is realized by the motor speed reduction unit provided outside the casing driving the two revolution axes to swing synchronously in opposite or reverse directions, and the four points pivot connecting of the connecting rods and the towing loop through the driving arms. As a symmetrical drive with double revolution axes is adopted, the radial forces produced in the up and down movement of the towing loop could counterweigh each other. Further, as the four connecting rods driving the towing loop, the towing loop could not deflect in the up and down movement of the towing loop. In addition, as a pair of rotating wheels is omitted, the height of the device could be reduced greatly resulting higher operation stability. As a floating magnetic sealing ring being added on the basis of the current labyrinth seal and elastic seal, it forms an integral compound sealing in which a nitrogen gas annular curtain sealing and a floating magnetic sealing coexist. Therefore, the sealing performance is greatly enhanced, the consumption of nitrogen gas is effectively reduced and the working life of the device is extended. Statement of Invention The present invention relates to a synchrodrive blast furnace top chute distributing device with double levers and four suspending points having a hermetical cylinder casing, comprising an upper swing bearing (16), a rotating sleeve (17), a chute (12), a crank (11), a skeleton frame (9), trunnions (23), a towing loop (6), a thumb wheel unit (22), an orbit (3) and a lower swing bearing (7), the inner ring of the upper swing bearing (16) being fixed and connected with an upper top cover (1), the outside ring of the upper swing bearing (16) being fixed and connected with the rotating sleeve (17), the outside teeth provided on the outside ring of the upper swing bearing (16) being engaged with the output gear of the motor speed reduction unit on the upper top cover (1) for driving the rotating sleeve (17) to rotate, the chute (12) being connected with the rotating sleeve (17) through the trunnions (23) on both sides, characterized in that: two revolution axes (15, 20) provided in the cabinet are parallel with each other, four driving arms (21a, 21b, 21c, 2Id) are fixed to the revolution axes (15, 20), each of the driving arms is pivotally connected through the connecting rod (14) with the towing loop (6) a towing loop (6) is fixed and connected with the outside ring of the lower swing bearing (7), contact rollers (4) provided on the towing loop (6) are coordinated with vertical orbit provided on the inside wall of the cabinet (2), the thumb wheel unit (22) is fixed on the inside ring of the lower swing bearing (7), thumb wheels (13) on the thumb wheel unit (22) are coordinated with vertical chute provided on the outside wall of the rotating sleeve (17), the trunnions (23) are fixed and connected with the crank (11), pulley provided on the other end of the crank (11) is coordinated with bar notch provided on the skeleton frame (9) of the inner ring of the lower swing bearing (7), a sealing arrangement (18) is provided between the inner wall of the rotating sleeve (17) and the outside wall of the feed pipe (19), and a sealing arrangement (8) is provided between the lower part of the rotating sleeve (17) and the water-cooling dish (5). Brief description of the drawings Figure 1 is a sketch map illustrating the structure of this Invention; Figure 2 is a vertical view of Fig. 1; and Figure 3 is a sketch map illustrating the structure of the sealing unit. Detailed description of the invention Referring to Fig. 1 and Fig. 2, the invention comprises a cabinet 2 and a hermetical cylinder casing consisting of a water-cooling dish 5 and an upper top cover 1. Inside the hermetical cylinder casing, an upper swing bearing 16, a rotating sleeve 17, a chute 12, a crank 11, a skeleton frame 9, trunnions 23, a towing loop 6, a thumb wheel unit 22, an orbit 3, and a lower swing bearing 7 are provided. The inner upper swing bearing 16 is concentric with a feed pipe 19. The inner ring of the upper swing bearing 16 is fixed and connected with the upper top cover 1. The outside ring of the upper swing bearing 16 is fixed and connected with the rotating sleeve 17. The outside teeth provided on the outside ring of the upper swing bearing 16 are engaged with the output gear of the motor speed reduction unit on the upper top cover 1 for driving the rotating sleeve 17. The chute 12 is connected with the rotating sleeve 17 through trunnions 23, thus the rotation of the chute 12 is achieved. The two revolution axes 15 and 20 provided in the cabinet are parallel with each other. Four driving arms 21a, 21b, 21c and 2Id are fixed to the revolution axes 15 and 20 respectively. Each of the driving arms is connected with the towing loop 6 through a connecting rod 14. The towing loop 6 is fixed and connected with the outside ring of the lower swing bearing 7. The contact rollers 4 provided on the towing loop 6 is coordinated with the vertical orbit provided on the inside wall of the cabinet 2. A thumb wheel unit 22 is fixed to the inside ring of the lower swing bearing 7. The thumb wheels 13 of the thumb wheel unit 22 is coordinated with the vertical chute provided on the outside wall of the rotating sleeve 17 so as to form synchronous rotation of the inside ring of the lower swing bearing 7 and the rotating sleeve 17. The trunnions 23 are fixed and connected with the cranks 11. The pulley provided on the other end of each of the crank 11 is coordinated with the bar notch provided on the skeleton frame 9 of the inner ring of the lower swing bearing 7. Between the inner wall of the rotating sleeve 17 and the outside wall of the feed pipe 19, a sealing arrangement 18 is provided. Between the lower part of the rotating sleeve 17 and the water-cooling dish 5, a sealing arrangement 8 is provided. In the chute distributing device with double levers and four suspending points of the invention, two driving arms 21a, 21b are fixed to the revolution axis 20, and the other two driving arms 21c and 21 d are fixed to the other revolution axis 15. They are connected through the connecting rods 14 with the four suspending points of the towing loop 6. The contact rollers 4 provided on the towing loop 6 is coordinated with the anti-rotating orbit 3 provided on the inside wall of the cabinet. The dumping movement of the chute is realized by that the motor speed reduction unit provided on the side of the cabinet drives the two revolution axes to swing synchronously in opposite or reverse directions, forming the up and down and reciprocating movement of the towing loop 6 through the connection of the four driving arms 21, the connecting rod 14 and the towing loop 6. The towing loop 6 is fixed and connected with the outside ring of the lower swing bearing 7. The inner ring of the lower swing bearing 7 is connected with the skeleton frame 9. The trunnions 23 connected with the chute 12 are coordinated through the crank 11 with the skeleton frame 9 so as to realize the dumping movement of the chute 12. In the lower parts of the outside and inner cylinder surfaces of the seal receptacle 31, a flat annular notch 34 is provided respectively. Two annular notches are provided on the upper end face of the seal receptacle 31. The nitrogen gas go through the nitrogen gas opening 46 into the inner notch so as to form the nitrogen gas annular curtain 45, On the outside notch, the floating magnetic sealing ring 44 is provided. In the inner notch 34, a sealing ring 35 is placed. In the middle part of the outside cylinder surface of the seal receptacle 31, three deep annular notches 36 are provided. In the notches 36, snap elastic sealing rings 37 are placed. A lube oil hole 38 provided in the seal receptacle 31 communicates with the lube oil duct 39 provided in the water-cooling dish 5. The floating magnetic sealing ring is a nodular graphite cast-iron ring-shaped element44. On one of its end faces, twenty-four holes of 010 x 16 deep are provided, in which permanent magnets 47 are placed. On one end face of each permanent magnet, magnet-partitioned pad 48 is attached. On the other end face of each permanent magnet, the nodular graphite cast-iron ring-shaped part 44 is absorbingly attached within the upper flat slot in the water-sealing cover of the rotating sleeve 17 by the permanent magnet 47. We claim: 1. A synchrodrive blast furnace top chute distributing device with double levers and four suspending points having a hermetical cylinder casing, comprising an upper swing bearing (16), a rotating sleeve (17), a chute (12), a crank (11), a skeleton frame (9), trunnions (23), a towing loop (6), a thumb wheel unit (22). an orbit (3) and a lower swing bearing (7), the inner ring of the upper swing bearing (16) being fixed and connected with an upper top cover (1), the outside ring of the upper swing bearing (16) being fixed and connected with the rotating sleeve (17), the outside teeth provided on the outside ring of the upper swing bearing (16) being engaged with the output gear of the motor speed reduction unit on the upper top cover (1) for driving the rotating sleeve (17) to rotate, the chute (12) being connected with the rotating sleeve (17) through the trunnions (23) on both sides, characterized in that: two revolution axes (15,20) provided in the cabinet are parallel with each other, four driving arms (21a, 21b, 21c, 21d) are fixed to the revolution axes (15, 20), each of the driving arms is pivotally connected through the connecting rod (14) with the towing loop (6) a towing loop (6) is fixed and connected with the outside ring of the lower swing bearing (7), contact rollers (4) provided on the towing loop (6) are coordinated with vertical orbit provided on the inside wall of the cabinet (2), the thumb wheel unit (22) is fixed on the inside ring of the lower swing bearing (7), thumb wheels (13) on the thumb wheel unit (22) are coordinated with vertical chute provided on the outside wall of the rotating sleeve (17), the trunnions (23) are fixed and connected with the crank (11), pulley provided on the other end of the crank (11) is coordinated with bar notch provided on the skeleton frame (9) of the inner ring of the lower swing bearing (7), a sealing arrangement (18) is provided between the inner wall of the rotating sleeve (17) and the outside wall of the feed pipe (19), and a sealing arrangement (8) is provided between the lower part of the rotating sleeve (17) and the water-cooling dish (5). A synchrodrive blast furnace top chute distributing device with double levers and four suspending points according to Claim 1 wherein the two driving arms (21a, 21b) are fixed to the revolution axis (20), and the other two driving arms (21c, 2Id) are fixed to the other revolution axis (15), the driving arms are connected through the connecting rod (14) with the four suspending points of the towing loop (6), contact rollers (4) provided on the towing loop (6) are coordinated with the anti-rotating orbit (3) provided on the inside wall of the cabinet to form the up and down and reciprocating movement of the towing loop (6), the towing loop (6) is fixed and connected with the outside ring of the lower swing bearing (7). A synchrodrive blast furnace top chute distributing device with double levers and four suspending points according to Claim 1 or 2, wherein said sealing arrangements (8, 18) comprises a seal receptacle (31) provided with interference on the outside cylinder surface of the water-cooling dish , seal between the outside cylinder surface of the seal receptacle (31) and the inner cylinder surface of the water-seal cover of the rotating sleeve (17) is made through three elastic sealing rings in the middle part of the seal receptacle (31), two sealing rings are used between the upper end face of the seal receptacle and the upper surface of the water-seal cover of the rotating sleeve (17), the first ring is a nitrogen gas annular curtain sealing, the second is a floating magnetic sealing ring, two annular notches are provided inside and outside the cylinder surface of the seal receptacle (31), in which asbestos packing set is placed, in the seal receptacle (31), a lube oil duct (39) and an oil hole communicating with the annular notches are provided respectively. A synchrodrive blast furnace top chute distributing device with double levers and four suspending points according to Claim 3, wherein the flat annular notches (34) are provided respectively in the lower parts of the outside and inner cylinder surfaces of the seal receptacle (31), two annular notches are provided on the upper end face of the seal receptacle (31), wherein the nitrogen gas goes through the nitrogen gas opening (46) into the inner notch so as to form the nitrogen gas annular curtain (45), on the outside notch, a floating magnetic sealing ring (44) is provided, in the inner notch (34), a sealing ring (35) is placed, in the middle part of the outside cylinder surface of the seal receptacle (31), three deep annular notches (36) are provided, in the notches (36), snap elastic sealing rings (37) are placed, the lube oil hole (38) in the seal receptacle (31) communicates with the lube oil duct (39) in the water-cooling dish (5). 5. A synchrodrive blast furnace top chute distributing device with double levers and four suspending points according to Claim 3, wherein the floating magnetic sealing ring is a nodular graphite cast-iron ring-shaped part (44), twenty-four holes of 010 x 16 deep are provided on one of its end faces, in which permanent magnets (47) are placed, magnet-partitioned pad (48) is attached on one end face of each permanent magnet, on the other end face of the permanent magnet, the nodular graphite cast-iron ring-shaped element (44) is absorbingly attached within the upper flat slot in the water-sealing cover of the rotating sleeve (17) by the permanent magnet (47). 6. A synchrodrive blast furnace top chute distributing device with double levers and four suspending points having a hermetical cylinder casting, substantially

Documents:

481-che-2004-abstract.pdf

481-che-2004-claims duplicate.pdf

481-che-2004-claims original.pdf

481-che-2004-correspondnece-others.pdf

481-che-2004-correspondnece-po.pdf

481-che-2004-description(complete) duplicate.pdf

481-che-2004-description(complete) original.pdf

481-che-2004-drawings.pdf

481-che-2004-form 1.pdf

481-che-2004-form 26.pdf

481-che-2004-form 3.pdf

481-che-2004-form 5.pdf

481-che-2004-form19.pdf