CN114150127A - Rolling type annealing furnace for liquefied gas steel cylinder - Google Patents
Rolling type annealing furnace for liquefied gas steel cylinder Download PDFInfo
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- CN114150127A CN114150127A CN202111233294.9A CN202111233294A CN114150127A CN 114150127 A CN114150127 A CN 114150127A CN 202111233294 A CN202111233294 A CN 202111233294A CN 114150127 A CN114150127 A CN 114150127A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 68
- 239000010959 steel Substances 0.000 title claims abstract description 68
- 238000000137 annealing Methods 0.000 title claims abstract description 45
- 238000005096 rolling process Methods 0.000 title claims abstract description 39
- 239000000779 smoke Substances 0.000 claims abstract description 51
- 238000002485 combustion reaction Methods 0.000 claims abstract description 48
- 239000000446 fuel Substances 0.000 claims abstract description 32
- 238000004321 preservation Methods 0.000 claims abstract description 15
- 238000009413 insulation Methods 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims description 30
- 230000008878 coupling Effects 0.000 claims description 25
- 238000010168 coupling process Methods 0.000 claims description 25
- 238000005859 coupling reaction Methods 0.000 claims description 25
- 239000003517 fume Substances 0.000 claims description 23
- 230000005540 biological transmission Effects 0.000 claims description 21
- 238000005192 partition Methods 0.000 claims description 17
- 239000010425 asbestos Substances 0.000 claims description 8
- 239000004744 fabric Substances 0.000 claims description 8
- 229910052895 riebeckite Inorganic materials 0.000 claims description 8
- 239000004576 sand Substances 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000011449 brick Substances 0.000 claims description 3
- 210000005056 cell body Anatomy 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 239000003546 flue gas Substances 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 238000011068 loading method Methods 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
- C21D9/0025—Supports; Baskets; Containers; Covers
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The invention discloses a liquefied gas steel cylinder rolling type annealing furnace, which comprises a steel cylinder body, a base, a furnace body, a cover plate, an opening and closing device, a rolling mounting frame, a fixing device, a combustion device, a smoke exhaust device and a fan, and has the advantages that the movement of the cover plate and the rolling mounting frame relative to the furnace body is realized through the opening and closing device, no track is required to be arranged in the furnace body, so that the sealing performance of the cover plate and the furnace body can be improved, and further, the heat preservation and heat insulation effects are improved, during the annealing operation, the steel cylinder body on the rolling mounting frame can realize rotation and revolution, so that all parts of the steel cylinder body are uniformly heated, the annealing effect is improved, high-temperature smoke is discharged through the smoke exhaust device, the discharged high-temperature smoke can preheat fresh air conveyed by the fan, the heat in the discharged high-temperature smoke can be utilized, and the preheated air is introduced into the combustion device for supporting, the temperature in the furnace body can be prevented from being reduced, and the fuel can be more fully combusted.
Description
Technical Field
The invention relates to the technical field of production equipment of liquefied gas steel cylinders, in particular to a rolling type annealing furnace for liquefied gas steel cylinders.
Background
The liquefied gas steel cylinder is a storage tank for storing liquefied gas, the pressure is very high when the liquefied gas is in the storage tank, explosion can be caused by slight misoperation, the liquefied gas steel cylinder belongs to special equipment, the liquefied gas steel cylinder is made of steel materials and has certain pressure resistance, and the maximum bearing pressure of the liquefied gas steel cylinder is 2.1 MPa.
Because the liquefied gas cylinder is generally formed by welding steel materials, the position of a welding seam of the liquefied gas cylinder can generate stress, and in order to improve the pressure resistance of the liquefied gas cylinder, the liquefied gas cylinder needs to be subjected to an annealing process to eliminate the stress at the welding seam after being welded and formed.
Annealing is generally performed in an annealing furnace, and in the prior art, a trolley is generally used for placing a liquefied gas steel cylinder, the trolley is connected with a furnace body of the annealing furnace in a sliding manner, and the steel cylinder is loaded and unloaded through the relative movement of the trolley and the furnace body.
However, there are some problems in the prior art:
firstly, a motor and a speed reducer are adopted for driving a group of driving wheels at the front end through a chain for driving the trolley, a track is required to be arranged between the trolley and the furnace body, and when the trolley enters the furnace body for annealing operation, the sealing performance of the track position is poor, so that the heat insulation performance during the annealing operation is poor;
secondly, the steel cylinder is placed on a trolley for annealing operation, and the steel cylinder is kept still in the annealing process, so that all parts of the steel cylinder are heated unevenly;
thirdly, during annealing operation, fresh air needs to be continuously introduced for supporting combustion, but the temperature of the fresh air is low, so that the temperature in the furnace body is reduced when the fresh air is directly introduced for supporting combustion, and the fresh air with low temperature can cause insufficient combustion of fuel;
fourthly, high-temperature flue gas in the annealing process is directly discharged, heat in the high-temperature flue gas cannot be effectively utilized, and energy waste can be caused.
Disclosure of Invention
In order to solve the problems, the invention provides a rolling type annealing furnace for liquefied gas steel cylinders, which is realized by the following technical scheme.
A rolling type annealing furnace for liquefied gas steel cylinders comprises a steel cylinder body, a base, a furnace body, a cover plate, an opening and closing device, a rolling mounting rack, a fixing device, a combustion device, a smoke exhaust device and a fan;
the furnace body is fixedly connected to the upper surface of the base, a hearth penetrating to the right side of the furnace body is formed in the furnace body, a heat-insulating cylinder is arranged in the hearth, and the heat-insulating cylinder is formed by building refractory bricks;
the cover plate is connected to the right side of the furnace body in a sliding manner, the opening and closing device is arranged in the base and is used for driving the cover plate to move;
the rolling mounting frame is arranged on the left side of the cover plate;
the fixing device is arranged on the rolling mounting rack;
the combustion devices are symmetrically arranged at the front side and the rear side of the furnace body;
the smoke exhaust device is arranged at the top of the furnace body;
the fan is used for conveying oxygen-containing air to the combustion device.
Further, the rolling mounting frame comprises a rotating sleeve, a first rotating disc, a rotating motor, a second rotating disc, a seat plate and a rotating shaft; the rotating sleeve is fixedly connected to the left side of the cover plate, the outer ring of the first rotating disc is fixedly connected with an annular sliding block, the inner ring of the rotating sleeve is provided with an annular sliding groove, the first rotating disc is rotatably connected in the rotating sleeve through the matching of the sliding block and the sliding groove, the rotating motor is fixedly connected to the right side of the cover plate, the output shaft of the rotating motor is rotatably connected in the cover plate, the head of the output shaft of the rotating motor is fixedly connected with the center of the right side of the first rotating disc, the second rotating disc is arranged on the left side of the first rotating disc at intervals, the axes of the second rotating disc and the first rotating disc are coincident, the circumference of the outer ring of the second rotating disc is uniformly rotatably connected with rollers, the rollers are rotatably connected in a heat-insulating cylinder, the seat plate is fixedly connected to one side, which is close to each other, of the first rotating disc and the second rotating disc, connecting rods are fixedly connected between the four corners of the seat plate, and a plurality of rotating shafts are uniformly arranged around the circumferences of the axes of the first rotating disc and the second rotating disc, the friction wheel is fixedly connected to each rotating shaft along the axis direction of the rotating shaft, the right end of each rotating shaft extends out of the first rotating disc and is fixedly connected with the first transmission gear, the gear ring is fixedly connected to the inner wall of the rotating sleeve, the second transmission gear corresponding to the first transmission gear is connected to the right side of the first rotating disc in a rotating mode, two sides of the second transmission gear are meshed with the gear ring and the first transmission gear respectively, and the fixing device is arranged on the seat plate and corresponds to the seat plate and is arranged with the rotating shaft.
Further, the fixing device comprises a rail block and a shaft rod; the track groove has been seted up on the bedplate of pivot both sides, track piece sliding connection has the screw thread seat through the extension board rigid coupling in the track groove on the track piece, sets up the cell body that supplies the extension board to pass through on the bedplate, and still the rigid coupling has the mounting panel on the bedplate, the axostylus axostyle rotates to be connected in the mounting panel, has seted up on the axostylus axostyle of mounting panel both sides and has revolved to opposite thread groove, two the screw thread seat meshes with the thread groove respectively, and it has the mounting panel still to have the rigid coupling on the track piece, it is connected with the tight pulley to rotate between mounting panel and the track piece.
Further, when the steel cylinder body contacts with the friction wheel, the distance between the center of the steel cylinder body and the center of the corresponding fixed wheel is L, and L is 1/10-1/5 of the outer diameter of the steel cylinder body.
Further, the distance between the right side of a heat preservation and insulation section of thick bamboo and the right side of furnace body equals the thickness of changeing the cover, and annular seal groove has been seted up to the right flank of a heat preservation and insulation section of thick bamboo, the rigid coupling has the lug in the seal groove, the even rigid coupling of the left surface circumference of changeing the cover has branch, each the integrative rigid coupling of head of branch has the collar, and the rigid coupling has the asbestos screen cloth between the inside and outside left surface of collar and the left surface of changeing the cover, and the fine sand is flourished to splendid attire in the space that asbestos screen cloth, collar and commentaries on classics cover enclose.
Further, the combustion device comprises a first transfer chamber and a second transfer chamber; the first transfer bin is fixedly connected with the outer wall of a left side plate of the furnace body, a first partition plate is fixedly connected in the first transfer bin, the first partition plate divides the first transfer bin into a first fuel chamber and a first air chamber, a fuel pipe is fixedly connected on the left side plate of the first transfer bin, a valve is arranged on the fuel pipe, the second transfer bin is symmetrically and fixedly connected with the outer walls of the front side plate and the rear side plate of the furnace body, a combustion chamber is arranged at the position of the front side and the rear side of the heat-insulating cylinder corresponding to the second transfer bin, a second partition plate is fixedly connected in the second transfer bin, the second partition plate divides the second transfer bin into a second fuel chamber and a second air chamber, the second fuel chambers at the front side and the rear side are connected with the first fuel chamber through a first pipeline, the second chambers at the front side and the rear side are connected with the first air chamber through a second pipeline, a conveying pipe is fixedly connected on the second partition plate along the length direction, one end of the conveying pipe is communicated with the second fuel chamber, the other end of conveyer pipe passes the furnace body and stretches into in the burning chamber, and the rigid coupling has the combustion tube between the adjacent conveyer pipe, the dense jet orifice that has in one side at the directional furnace body center of combustion tube, the position rigid coupling that corresponds and the combustion tube in the burning chamber has the spark plug, just the position of each combustion tube on the furnace body is dense to have jet-propelled pipe, the both ends of jet-propelled pipe switch on with second air chamber and burning chamber respectively, the fan rigid coupling is at the left side board outer wall of furnace body, and the export of fan passes through the third pipeline and is connected with first air chamber.
Further, the smoke exhaust device comprises a smoke exhaust bin and a pressure relief plate; the utility model discloses a furnace body, including heat preservation heat insulating cylinder, discharge fume chamber, telescopic link, discharge fume chamber and discharge fume chamber, the discharge fume hole evenly is provided with a plurality ofly along the length direction in discharge fume chamber and discharge fume chamber, the sealed sliding connection of discharge fume plate is in discharge fume chamber, and the rigid coupling has the telescopic link between discharge fume chamber's the roof, the cover is equipped with on the telescopic link and supports tight spring, and first venthole has been seted up to discharge fume chamber's front and back both sides.
Further, heat preservation covers are fixedly connected to the front side and the rear side of the smoke discharge bin, heat exchange bins are fixedly connected between the left side plate and the right side plate of each heat preservation cover, air suction holes are densely distributed in positions, corresponding to the heat exchange bins, of the right side plate of each heat preservation cover, second air outlet holes are formed in the lower portions, away from the smoke discharge bin, of the side plates of the heat preservation covers, first air guide plates are fixedly connected to the outer walls of the heat exchange bins, second air guide plates are fixedly connected to the inner walls of the heat preservation covers and the outer walls of the front side plate and the rear side plate of the smoke discharge bin, the first air guide plates and the second air guide plates are arranged in a staggered mode, a fourth pipeline is fixedly connected to an inlet of the fan, a tee joint is fixedly connected to the head of the fourth pipeline, and the other two interfaces of the tee joint are respectively communicated with the heat exchange bins on the front side and the rear side through fifth pipelines.
Further, the opening and closing device comprises a threaded cylinder, an opening and closing motor, a screw and a sliding seat; the four corners of the left side of the cover plate are fixedly connected with slide bars, each slide bar is connected with the furnace body in a sliding way, the upper surface of the base is provided with a groove, a support plate is fixedly connected in the groove, the support plate is uniformly provided with a plurality of support plates along the length direction of the groove, the support plates are symmetrically and fixedly connected with shaft sleeves in the front and the back, the screw thread cylinders in the front and the back are respectively and rotatably connected in the shaft sleeves in the front and the back, the left side of each screw thread cylinder is fixedly connected with a driven gear, an opening and closing motor is fixedly connected on the left side of the groove, the head part of an output shaft of the opening and closing motor is fixedly connected with a driving gear, the two driven gears are meshed with the driving gear on the two sides of the driving gear, the screws are meshed in the screw thread cylinders, the right end of each screw is integrally and fixedly connected with the slide seat, the slide seat is connected in the groove in a sliding way, guide bars are further fixedly connected with the front and the front side plate and the back side plate of the groove, and the slide seat are connected with the corresponding guide bars in a sliding way, the bottom of the cover plate is fixedly connected with the sliding seat.
The invention has the advantages that the cover plate moves relative to the furnace body through the opening and closing device, so that the movement of the rolling mounting frame is realized, the rolling mounting frame is moved out of the furnace body when the steel cylinder body is placed, the rolling mounting frame is moved into the furnace body during annealing operation, tracks are not required to be arranged in the furnace body, so that the sealing performance of the cover plate and the furnace body can be improved, and further the heat preservation and heat insulation effects are improved, the steel cylinder body on the rolling mounting frame can realize rotation and revolution during the annealing operation, so that each part of the steel cylinder body is uniformly heated, the annealing effect is improved, the high-temperature smoke is discharged through the smoke discharging device, the fresh air conveyed by the fan can be preheated by the discharged high-temperature smoke, the heat in the discharged high-temperature smoke can be utilized, the preheated air is introduced to the combustion device for supporting combustion, and the temperature reduction in the furnace body can be avoided, the combustion of the fuel can be made more sufficient.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without inventive labor.
FIG. 1: the invention relates to a three-dimensional schematic diagram of a rolling type annealing furnace for liquefied gas steel cylinders;
FIG. 2: the invention discloses a three-dimensional schematic diagram of another angle of the liquefied gas steel cylinder rolling type annealing furnace;
FIG. 3: a partial schematic view of the rolling mount of the present invention;
FIG. 4: the internal structure of the rotating sleeve is schematically shown;
FIG. 5: the installation schematic diagram of the steel cylinder body is shown;
FIG. 6: the structure of the rotating sleeve is schematically shown;
FIG. 7: the invention discloses a sealing schematic diagram of a rotating sleeve and a heat-insulating cylinder;
FIG. 8: the invention relates to a partial section view of a combustion device;
FIG. 9: FIG. 8 is a partial enlarged view taken at the point I;
FIG. 10: a partial perspective view of the combustion apparatus of the present invention;
FIG. 11: the invention relates to a longitudinal section of the position of a furnace body;
FIG. 12: FIG. 11 is an enlarged fragmentary view at II;
FIG. 13: the invention discloses a structural schematic diagram of an opening and closing device.
The reference numbers are as follows:
1-a base;
2-furnace body, 21-hearth, 22-heat-insulating cylinder, 221-sealing groove, 222-bump, 223-support rod, 224-mounting ring, 225-asbestos mesh cloth, 226-fine sand;
3-cover plate;
41-a threaded cylinder, 42-an opening and closing motor, 43-a screw, 44-a sliding seat, 45-a sliding rod, 46-a groove, 47-a supporting plate, 48-a shaft sleeve, 49-a driven gear, 410-a driving gear and 411-a guide rod;
51-rotating sleeve, 52-first rotating disc, 53-rotating motor, 54-second rotating disc, 55-seat plate, 56-rotating shaft, 57-sliding block, 58-sliding groove, 59-rolling wheel, 510-connecting rod, 511-friction wheel, 512-first transmission gear, 513-gear ring and 514-second transmission gear;
61-track block, 62-shaft lever, 63-track groove, 64-support plate, 65-thread seat, 66-groove body, 67-mounting plate, 68-thread groove, 69-support plate and 610-fixed wheel;
71-first rotary silo, 72-second rotary silo, 73-first partition, 74-first fuel chamber, 75-first air chamber, 76-fuel pipe, 77-valve, 78-combustion chamber, 79-second partition, 710-second fuel chamber, 711-second air chamber, 712-first conduit, 713-second conduit, 714-delivery pipe, 715-combustion pipe, 716-injection hole, 717-spark plug, 718-gas injection pipe;
81-smoke discharging bin, 82-pressure releasing plate, 83-smoke discharging cavity, 84-smoke discharging hole, 85-telescopic rod, 86-abutting spring and 87-first air outlet hole;
9-a fan, 91-a third pipeline, 92-a heat preservation cover, 93-a heat exchange bin, 94-an air extraction hole, 95-a second air outlet hole, 96-a first air deflector, 97-a second air deflector, 98-a fourth pipeline, 99-a tee joint and 910-a fifth pipeline.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-13, the present invention has the following six embodiments.
Example 1
A rolling type annealing furnace for liquefied gas steel cylinders comprises a steel cylinder body A, a base 1, a furnace body 2, a cover plate 3, an opening and closing device, a rolling mounting rack, a fixing device, a combustion device, a smoke exhaust device and a fan 9;
the furnace body 2 is fixedly connected to the upper surface of the base 1, a hearth 21 penetrating to the right side of the furnace body 2 is arranged in the furnace body 2, a heat-insulating cylinder 22 is arranged in the hearth 21, and the heat-insulating cylinder 22 is formed by building refractory bricks;
the cover plate 3 is connected to the right side of the furnace body 2 in a sliding manner, the opening and closing device is arranged in the base 1 and is used for driving the cover plate 3 to move;
the rolling mounting frame is arranged on the left side of the cover plate 3;
the fixing device is arranged on the rolling mounting rack;
the combustion devices are symmetrically arranged at the front side and the rear side of the furnace body 2;
the smoke exhaust device is arranged at the top of the furnace body 2;
the fan 9 is used to feed oxygen-containing air to the combustion device.
In this embodiment: the cover plate 3 is driven to move left and right relative to the furnace body 2 through the opening and closing device, so that the opening and closing of the cover plate 3 and the furnace body 2 are realized, and the arrangement of the opening and closing device can avoid the arrangement of a track in the furnace body 2, so that the sealing performance of the cover plate 3 and the furnace body 2 is improved, and the heat preservation and heat insulation effects are improved.
Roll mounting bracket and apron 3 simultaneous movement, when roll mounting bracket moved outside furnace body 2, can carry out steel bottle body A's material loading or unload, when roll mounting bracket moved within furnace body 2, can carry out annealing operation to steel bottle body A.
The cooperation of roll mounting bracket and fixing device is used, can carry out steel bottle body A's fixed, and at the in-process of annealing operation, can realize steel bottle body A's rotation and revolution, makes it be heated more evenly, and then improves the effect of annealing.
When steel bottle body A is located furnace 21, burner burns in the both sides of furnace body 2, thereby heat annealing to steel bottle body A, fan 9 is combustion-supporting in with external fresh air suction furnace body 2, carry out the emission of high temperature flue gas through fume extractor, the fresh air of fan 9 extraction preheats when the position through fume extractor, thereby can utilize the heat in the high temperature flue gas of emission, the air after preheating lets in burner department and supports combustion, can avoid the temperature reduction in the furnace body 2, also can make the burning of fuel more abundant.
Example 2
The difference from embodiment 1 is that the following is also included:
the rolling mounting frame comprises a rotating sleeve 51, a first rotating disc 52, a rotating motor 53, a second rotating disc 54, a seat plate 55 and a rotating shaft 56; the rotating sleeve 51 is fixedly connected to the left side of the cover plate 3, the outer ring of the first rotating disk 52 is fixedly connected with an annular sliding block 57, the inner ring of the rotating sleeve 51 is provided with an annular sliding groove 58, the first rotating disk 52 is rotatably connected into the rotating sleeve 51 through the matching of the sliding block 57 and the sliding groove 58, the rotating motor 53 is fixedly connected to the right side of the cover plate 3, the output shaft of the rotating motor 53 is rotatably connected into the cover plate 3, the head part of the output shaft of the rotating motor 53 is fixedly connected with the center of the right side of the first rotating disk 52, the second rotating disk 54 is arranged at the left side of the first rotating disk 52 at intervals, the axes of the second rotating disk 54 and the first rotating disk 52 are superposed, the circumference of the outer ring of the second rotating disk 54 is uniformly and rotatably connected with rollers 59, the rollers 59 are rotatably connected into the heat-insulating cylinder 22 in a rolling manner, the side, which is close to the first rotating disk 52 and the second rotating disk 54, is fixedly connected with a seat plate 55, connecting rod 510 is fixedly connected between four corners of the seat plate 55, and the rotating shaft 56 is rotatably connected between the seat plates 55, the rotating shafts 56 are uniformly arranged in a plurality around the circumference of the axes of the first rotating disc 52 and the second rotating disc 54, each rotating shaft 56 is uniformly and fixedly connected with a friction wheel 511 along the axis direction, the right end of each rotating shaft 56 extends out of the first rotating disc 52 and is fixedly connected with a first transmission gear 512, the inner wall of the rotating sleeve 51 is fixedly connected with a gear ring 513, the right side of the first rotating disc 52 is rotatably connected with a second transmission gear 514 corresponding to the first transmission gear 512, two sides of the second transmission gear 514 are respectively meshed with the gear ring 513 and the first transmission gear 512, and the fixing device is arranged on the seat plate 55 and is correspondingly arranged with the rotating shafts 56.
As a further embodiment of the present embodiment, the fixing means comprises a rail block 61 and a shaft 62; track groove 63 has been seted up on the bedplate 55 of pivot 56 both sides, track piece 61 sliding connection is in track groove 63, there is screw thread seat 65 through extension board 64 rigid coupling on the track piece 61, set up the cell body 66 that supplies extension board 64 to pass through on the bedplate 55, it has mounting panel 67 still to have the rigid coupling on the bedplate 55, axostylus axostyle 62 rotates and connects in mounting panel 67, set up on the axostylus axostyle 62 of mounting panel 67 both sides and revolve to opposite thread groove 68, two screw thread seats 65 respectively with the thread groove 68 meshing, it has mounting panel 69 still to have the rigid coupling on the track piece 61, it is connected with tight pulley 610 to rotate between mounting panel 69 and the track piece 61.
In a further embodiment of this embodiment, when the cylinder body A contacts the friction wheel 511, the distance between the center of the cylinder body A and the center of the corresponding fixed wheel 610 is L, and L is 1/10-1/5 of the outer diameter of the cylinder body A.
In this embodiment: the utility model discloses a concrete structure of roll mounting bracket and fixing device, it is preferred, pivot 56 is provided with four, when carrying out steel bottle body A's material loading, places steel bottle body A on uppermost pivot 56, steel bottle body A's bottom and friction pulley 511 contact, fix steel bottle body A through fixing device, then rotate the roll mounting bracket 90, place another steel bottle body A on uppermost pivot 56 again, so circulate, can realize all steel bottle body A's material loading.
As shown in fig. 5, in the description of mounting the uppermost cylinder body a, the friction wheel 511 is in contact with the bottom of the cylinder body a, the shaft 62 is rotated, and the screw sockets 65 on both sides are engaged with the two screw grooves 68 having opposite rotation directions, so that the two screw sockets 65 can approach each other when the shaft 62 is rotated, the rail block 61 and the fixed wheel 610 move in synchronization with the screw sockets 65, and the two fixed wheels 610 are in contact with the cylinder body a on both front and rear sides, and the two fixed wheels 610 and the friction wheel 511 fix the cylinder body a at three points.
Because the axis of the fixed wheel 610 is located above the axis of the cylinder body a, and the distance between the axes is L, that is, the contact position of the fixed wheel 610 and the cylinder body a is located above the axis of the cylinder body a, the cylinder body a can be prevented from falling off, when the fixed wheel 610 approaches each other to extrude the cylinder body a, the extrusion force has a component force pointing to the friction wheel 511, so that the cylinder body a and the friction wheel 511 are pressed tightly.
After the feeding of steel bottle body A was accomplished, moved roll mounting bracket and apron 3 left through the device that opens and shuts, roll mounting bracket and steel bottle body A get into and carry out annealing operation in furnace 21.
In the annealing process, the rotating motor 53 works to drive the first rotating disc 52 to rotate, and the first rotating disc 52, the second rotating disc 54 and the steel cylinder body A revolve around the axis of the rotating sleeve 51 because the first rotating disc 52 and the second rotating disc 54 are fixedly connected into an integral structure through the connecting rod 510.
As shown in fig. 4, the first rotating disc 52 drives the second transmission gear 514 to revolve when rotating, and due to the arrangement of the gear ring 513, the second transmission gear 514 rotates during revolution, and the first transmission gear 512 engaged with the second transmission gear rotates, so as to drive the rotating shaft 56 and the friction wheel 511 to rotate, and the friction force between the friction wheel 511 and the steel cylinder body a enables the steel cylinder body a to rotate, so that the steel cylinder body a simultaneously rotates and revolves, and thus the steel cylinder body a is heated uniformly, and the annealing effect is improved.
Example 3
The difference from embodiment 2 is that the following contents are also included:
the distance between the right side of the heat-insulating cylinder 22 and the right side of the furnace body 2 is equal to the thickness of the rotary sleeve 51, the right side surface of the heat-insulating cylinder 22 is provided with an annular sealing groove 221, a bump 222 is fixedly connected in the sealing groove 221, supporting rods 223 are uniformly and fixedly connected on the circumference of the left side surface of the rotary sleeve 51, the heads of the supporting rods 223 are integrally and fixedly connected with a mounting ring 224, asbestos mesh cloth 225 is fixedly connected between the inner side and the outer side of the mounting ring 224 and the left side surface of the rotary sleeve 51, and fine sand 226 is contained in a space surrounded by the asbestos mesh cloth 225, the mounting ring 224 and the rotary sleeve 51.
In this embodiment: when a cover plate 3 moves leftwards, the rotary sleeve 51 enters a hearth 21, meanwhile, a support rod 223 drives a mounting ring 224 to enter a sealing groove 221, asbestos mesh cloth 225 is meshed with a bump 222 at the moment, the rotary sleeve 51 is hermetically connected with the heat-insulating sleeve 22 through fine sand 226, and therefore sealing performance during annealing operation is improved, and annealing effect is improved.
Example 4
The difference from embodiment 3 is that the following is also included:
the combustion device comprises a first transfer chamber 71 and a second transfer chamber 72; the first transfer chamber 71 is fixedly connected with the outer wall of the left side plate of the furnace body 2, a first partition plate 73 is fixedly connected in the first transfer chamber 71, the first partition plate 73 divides the first transfer chamber 71 into a first fuel chamber 74 and a first air chamber 75, a fuel pipe 76 is fixedly connected on the left side plate of the first transfer chamber 71, a valve 77 is arranged on the fuel pipe 76, the second transfer chamber 72 is symmetrically and fixedly connected with the outer walls of the front and rear side plates of the furnace body 2, a combustion chamber 78 is arranged at the front and rear sides of the heat-insulating cylinder 22 corresponding to the position of the second transfer chamber 72, a second partition plate 79 is fixedly connected in the second transfer chamber 72, the second partition plate 79 divides the second transfer chamber 72 into a second fuel chamber 710 and a second air chamber 711, the second fuel chamber 710 at the front and rear sides is connected with the first fuel chamber 74 through a first pipeline 712, the second air chamber 711 at the front and rear sides is connected with the first air chamber 75 through a second pipeline 713, and conveying pipes 714 are uniformly and fixedly connected on the second partition plate 79 along the length direction, one end of the delivery pipe 714 is communicated with the second fuel chamber 710, the other end of the delivery pipe 714 passes through the furnace body 2 and extends into the combustion chamber 78, a combustion pipe 715 is fixedly connected between adjacent delivery pipes 714, spray holes 716 are densely distributed on one side of the combustion pipe 715 pointing to the center of the furnace body 2, a spark plug 717 is fixedly connected with the combustion chamber 78 corresponding to the position of the combustion pipe 715, an air injection pipe 718 is densely distributed on the furnace body 2 opposite to each combustion pipe 715, two ends of the air injection pipe 718 are respectively communicated with the second air chamber 711 and the combustion chamber 78, the fan 9 is fixedly connected on the outer wall of the left side plate of the furnace body 2, and the outlet of the fan 9 is connected with the first air chamber 75 through a third pipeline 91.
In this embodiment: the specific structure of the combustion device is disclosed, during annealing operation, the valve 77 is opened, external natural gas enters the combustion pipe 715 through the fuel pipe 76, the first fuel chamber 74, the first pipeline 712, the second fuel chamber 710 and the delivery pipe 714 in sequence and is ejected from the ejection hole 716, the fan 9 extracts fresh air and delivers the fresh air into the first air chamber 75 through the third pipeline 91, and the air is ejected through the second pipeline 713, the second air chamber 711 and the ejection pipe 718 in sequence and is mixed with the natural gas ejected from the ejection hole 716 to be ignited through the spark plug 717.
The natural gas sprays the burning in combustion chamber 78 position to heat annealing operation to steel bottle body A, the setting of burner 715 makes spray flame along furnace 21's length direction evenly distributed, and the rotation and the revolution of cooperation steel bottle body A make steel bottle body A be heated more evenly.
Example 5
The difference from embodiment 4 is that the following is also included:
the smoke exhaust device comprises a smoke exhaust bin 81 and a pressure relief plate 82; the exhaust smoke bin 81 is fixedly connected to the upper surface of a top plate of the furnace body 2, a smoke exhaust cavity 83 is formed in the position, corresponding to the exhaust smoke bin 81, of the heat-insulating cylinder 22, the smoke exhaust cavity 83 is communicated with the exhaust smoke bin 81 through a smoke exhaust hole 84, the smoke exhaust hole 84 is uniformly formed in a plurality of positions along the length direction of the smoke exhaust cavity 83 and the length direction of the smoke exhaust bin 81, the pressure relief plate 82 is connected in the exhaust smoke bin 81 in a sealing and sliding mode, an expansion link 85 is fixedly connected between the pressure relief plate 82 and the top plate of the smoke exhaust bin 81, a abutting spring 86 is sleeved on the expansion link 85, and first air outlet holes 87 are formed in the front side and the rear side of the smoke exhaust smoke bin 81.
As a further embodiment of this embodiment, heat-insulating covers 92 are fixedly connected to front and rear sides of the smoke exhaust bin 81, a heat exchange bin 93 is fixedly connected between left and right side plates of each heat-insulating cover 92, air extraction holes 94 are densely distributed on the right side plate of each heat-insulating cover 92 corresponding to the positions of the heat exchange bins 93, a second air outlet hole 95 is formed in the lower portion of the side plate of each heat-insulating cover 92 away from the smoke exhaust bin 81, a first air deflector 96 is fixedly connected to an outer wall of the heat exchange bin 93, second air deflectors 97 are fixedly connected to an inner wall of each heat-insulating cover 92 and front and rear side plate outer walls of the smoke exhaust bin 81, the first air deflectors 96 and the second air deflectors 97 are arranged in a staggered manner, a fourth pipeline 98 is fixedly connected to an inlet of the fan 9, a tee joint 99 is fixedly connected to a head portion of the fourth pipeline 98, and two other interfaces of the tee joint 99 are respectively communicated with the heat exchange bins 93 on the front and rear sides through fifth pipelines 910.
In this embodiment: the specific structure of the fume extractor and the preheating structure for extracting air from the fan 9 are disclosed, and when annealing operation is carried out in the hearth 21, high-temperature and high-pressure gas generated during combustion overcomes the pressure of the abutting spring 86 to jack the pressure relief plate 82.
Therefore, the flue gas enters the heat-insulating cover 92 through the smoke exhaust hole 84 and the first air outlet hole 87, and the flow distance of the flue gas in the heat-insulating cover 92 is prolonged through the flow guide effect of the first air deflector 96 and the second air deflector 97.
When the fan 9 works, the fresh air enters the heat exchange bin 93 through the air exhaust hole 94 and is subjected to heat interaction with the flowing smoke in the heat insulation cover 92, so that the fresh air is preheated, the smoke after heat exchange is discharged from the second air outlet hole 95, and the fresh air absorbs heat in the high-temperature smoke, so that the heat can be recycled.
The preheated fresh air enters the first air chamber 75 through the fifth pipeline 910, the fourth pipeline 98 and the third pipeline 91 in sequence, and the preheated air is introduced into the furnace body 2 for combustion supporting, so that the temperature reduction in the furnace body 2 can be avoided, and the fuel can be combusted more sufficiently.
Example 6
The difference from embodiment 5 is that the following is also included:
the opening and closing device comprises a threaded cylinder 41, an opening and closing motor 42, a screw 43 and a sliding seat 44; slide bars 45 are fixedly connected at the four corners of the left side of the cover plate 3, each slide bar 45 is connected with the furnace body 2 in a sliding way, a groove 46 is arranged on the upper surface of the base 1, a support plate 47 is fixedly connected in the groove 46, a plurality of support plates 47 are uniformly arranged along the length direction of the groove 46, shaft sleeves 48 are symmetrically and fixedly connected on each support plate 47 in the front-back direction, two screw thread cylinders 41 are symmetrically and longitudinally arranged, the screw thread cylinders 41 on the front side and the rear side are respectively and rotatably connected in the shaft sleeves 48 on the front side and the rear side, a driven gear 49 is fixedly connected on the left side of each screw thread cylinder 41, an opening-closing motor 42 is fixedly connected on the left side of the groove 46, a driving gear 410 is fixedly connected at the head of an output shaft of the opening-closing motor 42, two driven gears 49 are engaged with the driving gear 410 on the two sides of the screw rod 43, the screw rod 43 is engaged in the screw thread cylinders 41, a slide seat 44 is integrally and fixedly connected on the right end of each screw rod 43, the slide seat 44 is slidably connected in the groove 46, and guide rods 411 are further fixedly connected on the front side and rear side of the groove 46, the sliding base 44 is connected with the corresponding guide rod 411 in a sliding way, and the bottom of the cover plate 3 is fixedly connected with the sliding base 44.
In this embodiment: the specific structure of the opening device is disclosed, the opening and closing motor 42 drives the driving gear 410 to rotate when in work, the driving gear 410 drives the two driven gears 49 which are meshed with the driving gear to rotate, so that the thread cylinder 41 rotates, and the thread cylinder 41 can drive the screw 43 to stretch and retract when rotating, so that the sliding seat 44 is driven to move, the cover plate 3 is driven to move, and the opening and closing of the cover plate 3 are realized.
The opening and closing motor 42 is provided as a servo motor, and a reversing switch is provided for controlling the rotation direction of the opening and closing motor 42, thereby controlling the opening and closing of the cover plate 3 by controlling the rotation direction of the opening and closing motor 42.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (9)
1. The utility model provides a liquefied gas steel bottle roll formula annealing stove, includes the steel bottle body, its characterized in that: the furnace body is provided with a furnace body, a cover plate, an opening and closing device, a rolling mounting frame, a fixing device, a combustion device, a smoke exhaust device and a fan;
the furnace body is fixedly connected to the upper surface of the base, a hearth penetrating to the right side of the furnace body is formed in the furnace body, a heat-insulating cylinder is arranged in the hearth, and the heat-insulating cylinder is formed by building refractory bricks;
the cover plate is connected to the right side of the furnace body in a sliding manner, the opening and closing device is arranged in the base and is used for driving the cover plate to move;
the rolling mounting frame is arranged on the left side of the cover plate;
the fixing device is arranged on the rolling mounting rack;
the combustion devices are symmetrically arranged at the front side and the rear side of the furnace body;
the smoke exhaust device is arranged at the top of the furnace body;
the fan is used for conveying oxygen-containing air to the combustion device.
2. The rolling type annealing furnace for liquefied gas steel cylinder according to claim 1, characterized in that: the rolling mounting frame comprises a rotating sleeve, a first rotating disc, a rotating motor, a second rotating disc, a seat plate and a rotating shaft; the rotating sleeve is fixedly connected to the left side of the cover plate, the outer ring of the first rotating disc is fixedly connected with an annular sliding block, the inner ring of the rotating sleeve is provided with an annular sliding groove, the first rotating disc is rotatably connected in the rotating sleeve through the matching of the sliding block and the sliding groove, the rotating motor is fixedly connected to the right side of the cover plate, the output shaft of the rotating motor is rotatably connected in the cover plate, the head of the output shaft of the rotating motor is fixedly connected with the center of the right side of the first rotating disc, the second rotating disc is arranged on the left side of the first rotating disc at intervals, the axes of the second rotating disc and the first rotating disc are coincident, the circumference of the outer ring of the second rotating disc is uniformly rotatably connected with rollers, the rollers are rotatably connected in a heat-insulating cylinder, the seat plate is fixedly connected to one side, which is close to each other, of the first rotating disc and the second rotating disc, connecting rods are fixedly connected between the four corners of the seat plate, and a plurality of rotating shafts are uniformly arranged around the circumferences of the axes of the first rotating disc and the second rotating disc, the friction wheel is fixedly connected to each rotating shaft along the axis direction of the rotating shaft, the right end of each rotating shaft extends out of the first rotating disc and is fixedly connected with the first transmission gear, the gear ring is fixedly connected to the inner wall of the rotating sleeve, the second transmission gear corresponding to the first transmission gear is connected to the right side of the first rotating disc in a rotating mode, two sides of the second transmission gear are meshed with the gear ring and the first transmission gear respectively, and the fixing device is arranged on the seat plate and corresponds to the seat plate and is arranged with the rotating shaft.
3. The rolling type annealing furnace for liquefied gas steel cylinder according to claim 2, characterized in that: the fixing device comprises a track block and a shaft rod; the track groove has been seted up on the bedplate of pivot both sides, track piece sliding connection has the screw thread seat through the extension board rigid coupling in the track groove on the track piece, sets up the cell body that supplies the extension board to pass through on the bedplate, and still the rigid coupling has the mounting panel on the bedplate, the axostylus axostyle rotates to be connected in the mounting panel, has seted up on the axostylus axostyle of mounting panel both sides and has revolved to opposite thread groove, two the screw thread seat meshes with the thread groove respectively, and it has the mounting panel still to have the rigid coupling on the track piece, it is connected with the tight pulley to rotate between mounting panel and the track piece.
4. The rolling type annealing furnace for liquefied gas steel cylinder according to claim 3, wherein: when the steel cylinder body contacts with the friction wheel, the distance between the center of the steel cylinder body and the center of the corresponding fixed wheel is L, and L is 1/10-1/5 of the outer diameter of the steel cylinder body.
5. The rolling type annealing furnace for liquefied gas steel cylinder according to claim 4, wherein: the distance between the right side of a heat preservation heat-insulating cylinder and the right side of furnace body equals the thickness of changeing the cover, and annular seal groove has been seted up to the right flank of a heat preservation heat-insulating cylinder, the rigid coupling has the lug in the seal groove, the even rigid coupling of the left surface circumference of changeing the cover has branch, each the integrative rigid coupling of head of branch has the collar, and the rigid coupling has the asbestos screen cloth between the inside and outside of collar and the left surface of changeing the cover, and the fine sand is equipped with greatly in the space that asbestos screen cloth, collar and commentaries on classics cover enclose.
6. The rolling type annealing furnace for liquefied gas steel cylinder according to claim 5, wherein: the combustion device comprises a first transfer chamber and a second transfer chamber; the first transfer bin is fixedly connected with the outer wall of a left side plate of the furnace body, a first partition plate is fixedly connected in the first transfer bin, the first partition plate divides the first transfer bin into a first fuel chamber and a first air chamber, a fuel pipe is fixedly connected on the left side plate of the first transfer bin, a valve is arranged on the fuel pipe, the second transfer bin is symmetrically and fixedly connected with the outer walls of the front side plate and the rear side plate of the furnace body, a combustion chamber is arranged at the position of the front side and the rear side of the heat-insulating cylinder corresponding to the second transfer bin, a second partition plate is fixedly connected in the second transfer bin, the second partition plate divides the second transfer bin into a second fuel chamber and a second air chamber, the second fuel chambers at the front side and the rear side are connected with the first fuel chamber through a first pipeline, the second chambers at the front side and the rear side are connected with the first air chamber through a second pipeline, a conveying pipe is fixedly connected on the second partition plate along the length direction, one end of the conveying pipe is communicated with the second fuel chamber, the other end of conveyer pipe passes the furnace body and stretches into in the burning chamber, and the rigid coupling has the combustion tube between the adjacent conveyer pipe, the dense jet orifice that has in one side at the directional furnace body center of combustion tube, the position rigid coupling that corresponds and the combustion tube in the burning chamber has the spark plug, just the position of each combustion tube on the furnace body is dense to have jet-propelled pipe, the both ends of jet-propelled pipe switch on with second air chamber and burning chamber respectively, the fan rigid coupling is at the left side board outer wall of furnace body, and the export of fan passes through the third pipeline and is connected with first air chamber.
7. The rolling type annealing furnace for liquefied gas steel cylinder according to claim 6, wherein: the smoke exhaust device comprises a smoke exhaust bin and a pressure relief plate; the utility model discloses a furnace body, including heat preservation heat insulating cylinder, discharge fume chamber, telescopic link, discharge fume chamber and discharge fume chamber, the discharge fume hole evenly is provided with a plurality ofly along the length direction in discharge fume chamber and discharge fume chamber, the sealed sliding connection of discharge fume plate is in discharge fume chamber, and the rigid coupling has the telescopic link between discharge fume chamber's the roof, the cover is equipped with on the telescopic link and supports tight spring, and first venthole has been seted up to discharge fume chamber's front and back both sides.
8. The rolling type annealing furnace for liquefied gas steel cylinder according to claim 7, wherein: the heat-exchange smoke exhaust system is characterized in that heat-insulation covers are fixedly connected to the front side and the rear side of the smoke exhaust bin, heat-exchange bins are fixedly connected between the left side plate and the right side plate of each heat-insulation cover, air suction holes are densely distributed in positions, corresponding to the heat-exchange bins, on the right side plate of each heat-insulation cover, second air outlet holes are formed in the lower portion, away from the smoke exhaust bin, of each heat-insulation cover, first air guide plates are fixedly connected to the outer wall of each heat-exchange bin, second air guide plates are fixedly connected to the inner wall of each heat-insulation cover and the outer walls of the front side plate and the rear side plate of the smoke exhaust bin, the first air guide plates and the second air guide plates are arranged in a staggered mode, a fourth pipeline is fixedly connected to an inlet of the fan, a tee joint is fixedly connected to the head of the fourth pipeline, and the other two interfaces of the tee joint are respectively communicated with the heat-exchange bins on the front side and the rear side through fifth pipelines.
9. The rolling type annealing furnace for liquefied gas steel cylinder according to claim 8, wherein: the opening and closing device comprises a threaded cylinder, an opening and closing motor, a screw and a sliding seat; the four corners of the left side of the cover plate are fixedly connected with slide bars, each slide bar is connected with the furnace body in a sliding way, the upper surface of the base is provided with a groove, a support plate is fixedly connected in the groove, the support plate is uniformly provided with a plurality of support plates along the length direction of the groove, the support plates are symmetrically and fixedly connected with shaft sleeves in the front and the back, the screw thread cylinders in the front and the back are respectively and rotatably connected in the shaft sleeves in the front and the back, the left side of each screw thread cylinder is fixedly connected with a driven gear, an opening and closing motor is fixedly connected on the left side of the groove, the head part of an output shaft of the opening and closing motor is fixedly connected with a driving gear, the two driven gears are meshed with the driving gear on the two sides of the driving gear, the screws are meshed in the screw thread cylinders, the right end of each screw is integrally and fixedly connected with the slide seat, the slide seat is connected in the groove in a sliding way, guide bars are further fixedly connected with the front and the front side plate and the back side plate of the groove, and the slide seat are connected with the corresponding guide bars in a sliding way, the bottom of the cover plate is fixedly connected with the sliding seat.
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