CN212550956U

CN212550956U - Flue gas trapping device of ladle refining furnace

Info

Publication number: CN212550956U
Application number: CN202020701761.0U
Authority: CN
Inventors: 林炳生; 王庆文
Original assignee: Yunnan Qu Jing Cheng Gang Iron And Steel Group Co ltd
Current assignee: Yunnan Qu Jing Cheng Gang Iron And Steel Group Co ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2021-02-19
Anticipated expiration: 2030-04-30

Abstract

The utility model discloses a flue gas collecting device of a ladle refining furnace, which comprises a flue gas collecting cover and a mounting frame, wherein the flue gas collecting cover comprises a fixed smoke hood and a movable smoke hood, a top plate of the fixed smoke hood is sequentially provided with a smoke collecting pipe, a telescopic pipe, a conveying pipe and a cyclone dust collector, an air draft mechanism is arranged inside the fixed smoke hood, the movable smoke hood is movably arranged on the fixed smoke hood, a lifting mechanism is arranged at the top of the movable smoke hood, each side surface of the bottom of the movable smoke hood is provided with a side plate, and an opening and closing structure is arranged between each side plate and a lower lap joint flange of the corresponding movable smoke hood; the mounting bracket includes two slide rails, respectively installs a balladeur train on two relative sides of fixed petticoat pipe, all installs step motor between the both ends of two balladeur trains, all installs the pulley in step motor's the both ends pivot, and pulley slidable mounting is on the slide rail. The device has the advantages of reasonable structural design, flexible use, strong practicability, adjustable smoking range and obvious smoke trapping effect.

Description

Flue gas trapping device of ladle refining furnace

Technical Field

The utility model belongs to the technical field of steelmaking production facility, concretely relates to flue gas entrapment device of ladle refining furnace.

Background

A ladle refining furnace is a main external refining device in steel production. Its equipment mainly has water-cooled furnace lid, electric arc heating system and feeding device, wherein, the bell is used for the ladle mouth to seal, keep strong reducing atmosphere in the stove and prevent the molten steel heat dissipation, the water-cooled furnace lid is equipped with the dust removal facility of discharging fume, in the molten steel refining process, because electric arc effect and smelting in-process are reinforced, the argon blowing is fed a thread, produce a large amount of flue gas and dust, if not in time handle the flue gas and the dust that produce, can produce the interference to the realization of ladle handling in-process, still can cause serious pollution to the environment, direct harm staff's physical and mental health. In the prior art, the flue gas entrapment device of adoption is mostly fixed structure, and not only entrapment flue gas effect ability is poor, can't go out the flue gas water conservancy diversion that produces completely, and entrapment cover entrapment scope can't be adjusted moreover, and its practicality is lower, and the space range of flue gas entrapment is restricted, still has partial flue gas to escape from the space between entrapment cover and the refining furnace. Therefore, the development of the flue gas trapping device of the ladle refining furnace, which has the advantages of reasonable structural design, flexible use, strong practicability, adjustable smoking range and obvious flue gas trapping effect, is objectively needed.

Disclosure of Invention

An object of the utility model is to provide a flue gas entrapment device of ladle refining furnace that structural design is reasonable, use nimble, the practicality is strong, the smoking scope is adjustable, flue gas entrapment effect is showing.

The utility model aims to realize the purpose, which comprises a smoke collecting cover and a mounting rack, wherein the smoke collecting cover comprises a fixed smoke hood and a movable smoke hood, the fixed smoke hood and the movable smoke hood are both of a hollow rectangular structure, a top plate is arranged at the top of the fixed smoke hood, a smoke collecting pipe of an L-shaped structure is arranged on the top plate, an outlet of the smoke collecting pipe is connected with a telescopic pipe, an outlet of the telescopic pipe is connected with a conveying pipe, an outlet of the conveying pipe is connected with a cyclone dust collector, an air draft mechanism is arranged inside the fixed smoke hood, a stop flange extending outwards is arranged at the bottom of the fixed smoke hood, an upper lap joint flange extending inwards is arranged at the top of the movable smoke hood, a lower lap joint flange extending outwards is arranged at the bottom of the movable smoke hood, the upper lap joint flange is lapped on the upper surface of the stop flange and, each side face of the bottom of the movable smoke hood is provided with a side plate, each side plate is hinged with the lower lap joint flange through a hinge, an opening and closing structure is arranged between each side plate and the corresponding lower lap joint flange, the opening and closing mechanism comprises a double-shaft motor, a reel and a pull rope, the double-shaft motor is installed on the lower lap joint flange, the reel is installed on rotating shafts at two ends of the double-shaft motor respectively, lifting lugs corresponding to the positions of the reel are installed on the surfaces of the side plates, one end of the pull rope is wound on the reel, and the other end of the pull rope is fixedly connected with; the mounting bracket includes the slide rail that two horizontal intervals set up, respectively installs a balladeur train on two relative sides of fixed petticoat pipe, all installs step motor between the both ends of two balladeur trains, all installs the pulley in step motor's the both ends pivot, and pulley slidable mounting is on the slide rail.

Furthermore, a filter hood is movably arranged in the movable smoke hood, and an ash receiving box is movably arranged on the inner wall of the movable smoke hood at the bottom of the filter hood.

Further, air drafting mechanism includes air drafting motor, fan and transmission shaft, and air drafting motor passes through the support mounting on fixed petticoat pipe inner wall, and the vertical installation of transmission shaft is on air drafting motor's output shaft, and fan coaxial arrangement is in the outside of transmission shaft, is connected through the connecting rod between fan and the transmission shaft, and the shrouding has been clamped at the top of fan, and the upper end and the shrouding of transmission shaft rotate to be connected.

Furthermore, an elastic sealing ring is arranged between the upper lap joint flange and the stop flange.

Furthermore, elevating system is the lift cylinder, and the lift cylinder is 4, all is provided with a lift cylinder on every side of going up the overlap joint flange, and the jar seat of lift cylinder passes through the mounting panel to be installed on the slide rail, and the piston rod of lift cylinder is connected with the last fixed surface of last overlap joint flange.

Compared with the prior art, the device has the advantages that: the fixed smoke hood and the movable smoke hood are designed into telescopic structures, so that the length of a smoking distance can be adjusted according to the distance between the movable smoke hood and the refining furnace, smoke generated in the working process of the refining furnace is collected and guided, and the smoke collecting effect is improved; the bottom of the movable smoke hood is provided with the side plate, so that the length of the movable smoke hood is extended, the side plate can be controlled to turn over around the hinge by 90 degrees by utilizing the closing mechanism, the angle between the side plate and the movable smoke hood is adjustable, the size of a space range enclosed by the four side plates is adjustable, smoke generated around the refining furnace can be collected and guided, and the collecting effect of the smoke is further improved; thirdly, the step motor who sets up can drive fixed petticoat pipe and remove along the slide rail, and the in-process that the refining furnace was smelted, fixed petticoat pipe is located the top of refining furnace, smelts the completion back, and fixed petticoat pipe removes the one side to the refining furnace, does not hinder the handling work of ladle. The device has the advantages of reasonable structural design, flexible use, strong practicability, adjustable smoking range and obvious smoke trapping effect, and is easy to popularize and use.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic connection diagram of the movable smoke hood 4 and the side plate 1;

FIG. 3 is a schematic view of the air extracting mechanism 16;

FIG. 4 is a schematic top view of the mounting bracket coupled to the stationary hood 17;

in the figure, the device comprises a side plate 1, a double-shaft motor 2, a reel 3, a movable smoke hood 4, an upper overlapping flange 5, a lifting mechanism 6, a sliding rail 7, a cyclone dust collector 8, a delivery pipe 9, a telescopic pipe 10, a pulley 11, a stepping motor 12, a sliding frame 13, a smoke collecting pipe 14, a top plate 15, an air extracting mechanism 16, an air extracting motor 161, a sealing plate 162, a fan 163, a connecting rod 164, a transmission shaft 165, a fixed smoke hood 17, a stop flange 18, a lower overlapping flange 19, a pull rope 20, a lifting lug 21, an ash receiving box 22, a filter hood 23 and a hinge 24.

Detailed Description

The following further describes the present invention with reference to the attached drawings, but the present invention is not limited in any way, and any changes or improvements based on the teaching of the present invention all belong to the protection scope of the present invention.

As shown in fig. 1-4, the utility model comprises a flue gas collecting cover and a mounting frame, the flue gas collecting cover comprises a fixed flue cover 17 and a movable flue cover 4, the fixed flue cover 17 and the movable flue cover 4 are both of an internal hollow rectangular structure, a top plate 15 is installed at the top of the fixed flue cover 17, a flue collecting pipe 14 of an L-shaped structure is arranged on the top plate 15, an outlet of the flue collecting pipe 14 is connected with a telescopic pipe 10, an outlet of the telescopic pipe 10 is connected with a conveying pipe 9, an outlet of the conveying pipe 9 is connected with a cyclone dust collector 8, an air draft mechanism 16 is installed inside the fixed flue cover 17, an outward extending stopping flange 18 is arranged at the bottom of the fixed flue cover 17, the stopping flange 18 and the fixed flue cover 17 are integrally manufactured, an inward extending upper lapping flange 5 is arranged at the top of the movable flue cover 4, and an outward extending lower lapping flange 19 is, go up overlap joint flange 5 and overlap joint flange 19 and activity petticoat pipe 4 for whole processing preparation form, go up overlap joint flange 5 overlap joint at the upper surface of backstop flange 18 and with fixed petticoat pipe 17 sliding fit, go up and still install the elevating system 6 of drive activity petticoat pipe 4 oscilaltion on overlap joint flange 5, utilize elevating system 6 can control activity petticoat pipe 4 and reciprocate along fixed petticoat pipe 17, fixed petticoat pipe 17 and activity petticoat pipe 4 design into telescopic structure, can realize the regulation of smoking distance length according to the distance between activity petticoat pipe 4 and the refining furnace, carry out entrapment and water conservancy diversion to the flue gas of production in the refining furnace working process, improve the effect of entrapment flue gas, every side of activity petticoat pipe 4 bottom all is provided with a curb plate 1, 4 blocks of curb plates are installed in the bottom of activity petticoat pipe 4, are equivalent to the, each side plate 1 is hinged with a lower lap joint flange 19 through a hinge 24, an opening and closing structure is arranged between each side plate 1 and the corresponding lower lap joint flange 19, the opening and closing mechanism can control the side plates 1 to turn over along the hinge, the angle between each side plate 1 and the corresponding lower lap joint flange 19 can be adjusted, the four side plates 1 act simultaneously, the size of a space range enclosed by the four side plates 1 can be adjusted, therefore, smoke generated around a refining furnace can be completely collected and guided, the collection effect of the smoke is further improved, the opening and closing mechanism comprises a double-shaft motor 2, a reel 3 and a pull rope 20, the double-shaft motor 2 is an existing mechanism, finished products are directly purchased, the double-shaft motor 2 is installed on the lower lap joint flange 19, the reel 3 is respectively installed on rotating shafts at two ends of the double-shaft motor 2, lifting lugs 21 corresponding to the positions of the reel 3 are installed on the surface of each side plate 1, one end of the pull rope 20 is wound on the reel 3, and the other end of the pull rope 20 is fixedly connected with the lifting lug 21, so that when the double-shaft motor 2 is used for controlling the reel 3 to rotate forwards or backwards, the extension or the shortening of the pull rope 20 can be controlled, and further the angle between the side plate 1 and the corresponding upper lap joint flange 5 can be adjusted.

The mounting bracket includes slide rail 7 that two horizontal intervals set up, respectively install a balladeur train 13 on two relative sides of fixed petticoat pipe 17, all install step motor 12 between two balladeur train 13's both ends, step motor 12 is current structure, and the finished product is directly purchased, and step motor 12 passes through step-by-step rotation effect, realizes effectual displacement distance control, all install pulley 11 in step motor 12's the both ends pivot, pulley 11 slidable mounting is on slide rail 7, and pulley 11 can realize lateral sliding in slide rail 7.

The working process of the device is as follows: in the refining process of the refining furnace, the movable smoke hood 5 is positioned above the refining furnace, then the movable smoke hood 5 is controlled to move up and down through the lifting mechanism 6, the distance between the movable smoke hood 5 and the refining furnace is adjusted, then the air draft mechanism 16 starts to work, smoke generated in the refining process of the refining furnace passes through the movable smoke hood 5 and the fixed smoke hood 17 under the action of the air draft mechanism 16, enters the cyclone dust collector 8 for dust removal treatment after passing through the smoke collecting pipe 14, the telescopic pipe 10 and the conveying pipe 9, the smoke is guided out, in the smoke collecting process, under normal conditions, the four side plates 1 and the lower lap joint flange 19 are in a vertical state, if the overflow quantity of the smoke generated in refining is large, the double-shaft motor 2 can be controlled to work, the double-shaft motor 2 is used for controlling the reel 3, the side plates 1 can be upwards pulled up, and the angle between the side plates 1 and the movable smoke, and then increase the space that four blocks of curb plates 4 enclose to the entrapment more flue gas, after the refining work of refining furnace accomplished, through step motor 12's work, make pulley 11 remove on slide rail 7, drive fixed petticoat pipe 17 lateral shifting on slide rail 7 then, let petticoat pipe 7 be located the side of refining furnace, the convenience is lifted by crane to the ladle.

Further, the inside movable mounting of activity petticoat pipe 4 has filter mantle 23, and filter mantle 23 can carry out preliminary filtration to dust in the flue gas, movable mounting has on the inner wall of the activity petticoat pipe 4 of filter mantle 23 bottom and connects ash box 22, connects ash box 22 to collect the dust that filter mantle 23 filtered down, only need regularly to connect ash box 22 to carry out the deashing can.

Further, air extraction mechanism 16 includes air extraction motor 161, fan 163 and transmission shaft 165, and air extraction motor 161 is current structure, and fan 163 adopts the impeller structure in the range hood, air extraction motor 161 passes through the support mounting on fixed petticoat pipe 17 inner wall, the vertical output shaft of installing on air extraction motor 161 of transmission shaft 165, fan 163 coaxial arrangement is in the outside of transmission shaft 165, be connected through connecting rod 164 between fan 163 and the transmission shaft 165, fan 163's top clamps shrouding 162, transmission shaft 165's upper end and shrouding 162 rotate to be connected, and shrouding 162 seals admitting air, avoids influencing the effect of convulsions.

In order to avoid the smoke from escaping from the gap between the upper overlapping flange 5 and the stop flange 18, an elastic sealing ring is arranged between the upper overlapping flange 5 and the stop flange 18.

Preferably, the lifting mechanism 6 is a lifting cylinder, the number of the lifting cylinders is 4, each side surface of the upper lap joint flange 5 is provided with one lifting cylinder, a cylinder seat of each lifting cylinder is installed on the sliding rail 7 through an installation plate, and a piston rod of each lifting cylinder is fixedly connected with the upper surface of the upper lap joint flange 5.

Claims

1. The utility model provides a flue gas entrapment device of ladle refining furnace, includes flue gas entrapment cover and mounting bracket, its characterized in that, flue gas entrapment cover is including fixed petticoat pipe (17) and activity petticoat pipe (4), fixed petticoat pipe (17) and activity petticoat pipe (4) are inside hollow rectangle structure, roof (15) are installed at the top of fixed petticoat pipe (17), be provided with receipts tobacco pipe (14) of L type structure on roof (15), the exit linkage who receives tobacco pipe (14) has flexible pipe (10), the exit linkage of flexible pipe (10) has conveyer pipe (9), the exit linkage of conveyer pipe (9) has cyclone (8), the internally mounted of fixed petticoat pipe (17) has convulsions mechanism (16), the bottom of fixed petticoat pipe (17) is provided with outside extension's backstop flange (18), the top of activity petticoat pipe (4) is provided with inside extension's upward overlap joint flange (5), the bottom of activity petticoat pipe (4) is provided with lower overlap joint flange (19) of outside extension, go up overlap joint flange (5) overlap joint at the upper surface of backstop flange (18) and with fixed petticoat pipe (17) sliding fit, go up and still install elevating system (6) of drive activity petticoat pipe (4) oscilaltion on overlap joint flange (5), every side of activity petticoat pipe (4) bottom all is provided with a curb plate (1), and every curb plate (1) all is connected with overlap joint flange (19) are articulated down through hinge (24), and all is provided with between every curb plate (1) and corresponding lower overlap joint flange (19) and opens and close the structure, opening and close the structure and include biax motor (2), reel (3) and stay cord (20), biax motor (2) are installed under on overlap joint flange (19), reel (3) are installed respectively in the pivot at biax motor (2) both ends, a lifting lug (21) corresponding to the position of the reel (3) is arranged on the surface of the side plate (1), one end of the pull rope (20) is wound on the reel (3), and the other end of the pull rope is fixedly connected with the lifting lug (21);

the mounting bracket includes slide rail (7) that two horizontal intervals set up, respectively install a balladeur train (13) on two relative sides of fixed petticoat pipe (17), all install step motor (12) between the both ends of two balladeur trains (13), all install pulley (11) in the both ends pivot of step motor (12), pulley (11) slidable mounting is on slide rail (7).

2. The flue gas trapping device of the ladle refining furnace of claim 1, characterized in that: the inside movable mounting of activity petticoat pipe (4) has filter mantle (23), movable mounting has ash receiving box (22) on the inner wall of the activity petticoat pipe (4) of filter mantle (23) bottom.

3. The flue gas trapping device of the ladle refining furnace of claim 1, characterized in that: air drafting mechanism (16) include air draft motor (161), fan (163) and transmission shaft (165), air draft motor (161) pass through the support mounting on fixed petticoat pipe (17) inner wall, vertical the installing on the output shaft of air draft motor (161) of transmission shaft (165), fan (163) coaxial arrangement is in the outside of transmission shaft (165), be connected through connecting rod (164) between fan (163) and transmission shaft (165), the top of fan (163) clamps shrouding (162), the upper end and the shrouding (162) of transmission shaft (165) rotate to be connected.

4. The flue gas trapping device of the ladle refining furnace of claim 1, characterized in that: an elastic sealing ring is arranged between the upper lapping flange (5) and the stopping flange (18).

5. The flue gas trapping device of the ladle refining furnace of claim 1, characterized in that: elevating system (6) are the lift cylinder, the lift cylinder is 4, all is provided with a lift cylinder on every side of going up overlap joint flange (5), the jar seat of lift cylinder passes through the mounting panel and installs on slide rail (7), and the piston rod of lift cylinder is connected with the last fixed surface of last overlap joint flange (5).