CN110747311B - Jacking dismantling method for tangential keys of carbon steel converter - Google Patents
Jacking dismantling method for tangential keys of carbon steel converter Download PDFInfo
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- CN110747311B CN110747311B CN201911154802.7A CN201911154802A CN110747311B CN 110747311 B CN110747311 B CN 110747311B CN 201911154802 A CN201911154802 A CN 201911154802A CN 110747311 B CN110747311 B CN 110747311B
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- tangential
- jacking
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- shaped plate
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/08—Wrecking of buildings
- E04G23/083—Wrecking of buildings using vaporising wire technique
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention discloses a jacking dismantling method of tangential keys of a carbon steel converter, which comprises the following steps: 1. and (3) preparation of construction: determining the size head of the tangential key, preparing the tool and machine, removing sundries around the tangential key and locking the band-type brake; 2. dismantling the equipment arrangement: setting up a tangential key dismantling platform, installing long bolts, welding and fixing a T-shaped plate, and arranging a chain block, a jacking device and a collision block; 3. tangential key lift: the jacking device is pressurized step by step and synchronously jacked, the jacking device is pressurized to 50% of rated jacking force for the first time, meanwhile, the T-shaped plate tail is impacted, if the tangential key is not loosened, the jacking device is pressurized for 10% again, the pressure is maintained for 5 minutes, the T-shaped plate tail is continuously impacted, the jacking device is pressurized step by the method, and the tangential key is removed until the tangential key is loosened. The method for dismantling the tangential keys of the carbon steel converter has the advantages of low cost, easy operation, good safety and high success rate, solves the problem that the tangential keys of the carbon steel converter are difficult to dismantle, ensures the progress, quality and safety of the carbon steel converter, and has strong practicability.
Description
Technical Field
The invention relates to the technical field of buildings, in particular to a method for removing tangential keys of a carbon steel converter, which is suitable for removing tangential keys of a carbon steel converter with a similar structure by adopting a method for removing tangential keys of the converter by combining jacking and vibrating.
Background
With the improvement of the requirements of people on urban environment, in order to solve the problem of urban pollution of steel plants, a plurality of steel plants in China are stopped. In order to reasonably utilize resources, core equipment in a steel plant needs to be moved, and body equipment of a carbon steel converter generally needs to be removed and returned to the plant for maintenance and reuse. The carbon steel converter consists of a converter shell, a backing ring (containing trunnion), a bearing seat, a tilting device, a large gear box and the like. The tilting device generally adopts suspension type flexible transmission, and the whole tilting device comprises a primary speed reducer, a secondary speed reducer, a motor, a band-type brake and the like, wherein the number of the primary speed reducers is four, the primary speed reducer is meshed with a large gear in the secondary speed reducer, and the large gear is connected with a tilting side trunnion through a tangential key. Tangential keys are key components for transmitting the tilting moment of the converter tilting device. The tangential key is tightly connected with the large gear and the trunnion due to long-time use, and the dismantling difficulty is very high.
Disclosure of Invention
Aiming at the technical problems in the background technology, the invention provides the method for dismantling the tangential keys of the carbon steel converter, which has the advantages of low cost, easy operation, good safety and high success rate, solves the problem that the tangential keys of the carbon steel converter are difficult to dismantle, and ensures the progress, quality and safety of the carbon steel converter.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the invention discloses a jacking dismantling method of a tangential key of a carbon steel converter, which is implemented according to the following steps:
step one, preparing construction;
1.1 Placing the converter in an upward state of a furnace mouth, wherein tangential keys are positioned at two sides of the upper end of the trunnion, and determining a big end and a small end of the tangential keys according to the size of the head of the tangential keys;
1.2 Preparing a working machine: preparing 1 electric welding machine, 1 gas cutting tool, 2T-shaped plates with pin shafts, 2 long bolts matched with the tangential key big head reserved bolt holes, 2 jacking devices, 4 chain blocks, 1 collision block, a plurality of steel wire ropes, a plurality of scaffold steel pipes and a plurality of springboards;
1.3 Checking whether sundries exist around the tangential keys and among the tangential keys, and if so, removing the sundries;
1.4 A band brake of the converter tilting device is in a locking state;
step two: dismantling the equipment arrangement;
2.1 A tangential key dismantling platform is erected below the position where the tangential key is located;
2.2 Screw into the bolt hole that the tangential key big head reserved, the length that needs exposing part of long bolt outside the bolt hole, then utilize the gas cutting instrument to cut the head of long bolt to flush with the screw rod, namely: cutting off the head of the long bolt;
2.3 A long groove is formed in the lower portion of the T-shaped plate according to the exposed length of the long bolt, then the long groove of the T-shaped plate is sleeved into the exposed portion of the long bolt, and then the T-shaped plate is welded with the tangential key and the long bolt respectively, so that firm welding is required;
2.4 A steel wire rope is hung on a platform beam at the upper part of the T-shaped plate and used for installing four chain blocks; 4 chain blocks respectively hang the T-shaped plate, 2 jacking devices and the collision block;
2.5 Installing the jacking device between the T-shaped plate and the trunnion by using the chain block, and simultaneously ensuring that one of the 2 jacking devices is positioned at the small head side of the tangential key;
2.6 The collision block is hung to a proper position by utilizing the chain block, so that the head part of the collision block is opposite to the middle position of the tail part of the T-shaped plate;
step three: tangential key jacking;
3.1 2 jacking devices are pressurized step by step and synchronously jacked; the method comprises the steps of pressurizing for the first time to 50% of rated jacking force of a jacking device, observing loosening conditions of tangential keys, and simultaneously, striking the tail of a T-shaped plate by using a striking block to vibrate the T-shaped plate and transmitting vibration force to the tangential keys; if the tangential key is not loosened, pressurizing for 10 percent, maintaining the pressure for 5 minutes, simultaneously, impacting the tail of the T-shaped plate by using the collision block, gradually pressurizing by using the method until the tangential key is loosened, and then removing the tangential key.
As a further improvement of the technical scheme of the invention, the jacking device is a 200t hydraulic jack.
As a further improvement of the technical scheme of the invention, the chain block is a chain block with the specification of 1 t.
As a further improvement of the technical scheme of the invention, the dismantling platform is positioned at a position 0.8 m-1.2 m below the tangential key.
As a further improvement of the technical scheme of the invention, the length of the exposed bolt hole of the long bolt is 100mm.
In the third step, the welding seam between the T-shaped plate and the tangential key is noted in the jacking process, if the welding seam is torn, the jacking is stopped immediately, and repair welding or re-welding is performed and then jacking is performed again.
As a further improvement of the technical scheme of the invention, in the third step, after the T-shaped plate and the tangential key are welded again, the T-shaped plate does not need to be lifted again within 12 hours.
Compared with the prior art, the invention has the beneficial effects that: according to the jacking dismantling method for the tangential key of the carbon steel converter, the T-shaped plate is used as a jacking tool, so that the jacking efficiency is greatly improved, and the static friction force can be reduced to a certain extent by matching with the impact of the collision block during jacking.
In conclusion, the invention has influence on the progress of the factory building structure and fewer working procedures, and has the advantages of fast construction progress and small mechanical use quantity; the installation mode of multiple split and forward and reverse combination is relatively high in efficiency, low in investment, short in actual hoisting time and high in practicability.
Drawings
FIG. 1 is a schematic illustration of a method of lifting and removing tangential keys of a carbon steel converter according to the present invention;
in the figure: 1. a large gear box; 2. chain block; 3. tangential keys; 4. a jacking device; 5. t-shaped plates; 6. a bump; 7. dismantling the platform; 8. a trunnion; 9. a long bolt; 10. a platform beam.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the method for lifting and removing tangential keys of a carbon steel converter is implemented according to the following steps:
step one, preparing construction;
1.1 Placing the converter in a state that the furnace mouth is upward, wherein tangential keys 3 are positioned at two sides of the upper end of the trunnion 8, and determining the big end and the small end of the tangential keys 3 according to the head of the tangential keys 3;
1.2 Preparing a working machine: preparing 1 electric welding machine, 1 gas cutting tool, 2T-shaped plates with pin shafts 5, 2 long bolts 9 matched with reserved bolt holes of a tangential key big head, 2 jacking devices 4, 4 chain blocks 2, 1 collision block 6, a plurality of steel wire ropes, a plurality of scaffold steel pipes and a plurality of springboards;
1.3 Checking whether sundries exist around the tangential keys and among the tangential keys, and if so, removing the sundries;
1.4 A band brake of the converter tilting device is in a locking state;
step two: dismantling the equipment arrangement;
2.1 A tangential key dismantling platform 7 is erected below the position where the tangential key 3 is located;
2.2 Screw long bolt 9 into the bolt hole reserved by the big end of tangential key 3, long bolt 9 need expose partial length outside the bolt hole, then utilize the gas cutting tool to cut long bolt 9's head to flush with the screw rod, namely: cutting off the head of the long bolt;
2.3 A long groove is formed in the lower portion of the T-shaped plate 5 according to the exposed length of the long bolt 9, then the long groove of the T-shaped plate 5 is sleeved into the exposed portion of the long bolt 9, and then the T-shaped plate 5 is welded with the tangential key 3 and the long bolt 9 respectively, so that firm welding is required;
2.4 A steel wire rope is hung on a platform beam 10 at the upper part of the T-shaped plate 5 and used for installing four chain blocks 2;4 chain blocks 2 respectively hang a T-shaped plate 5, 2 jacking devices 4 and a collision block 6;
2.5 Mounting the jacking device 4 between the T-shaped plate 5 and the trunnion by using the chain block 2, ensuring that one of the 2 jacking devices 4 is positioned on the small head side of the tangential key 3, and placing the head of the jacking device 4 on the small head side of the tangential key 3 only;
2.6 The collision block 6 is lifted to a proper position by utilizing the chain block 2, so that the head of the collision block 6 is opposite to the middle position of the tail of the T-shaped plate 5;
step three: tangential key jacking;
3.1 2 jacking devices 4 are pressurized step by step and synchronously jacked; the first pressurizing is carried out until the rated jacking force of the jacking device 4 is 50%, the loosening condition of the tangential key 3 is observed, meanwhile, the tail of the T-shaped plate 5 is impacted by the impact block 6, so that the T-shaped plate 5 vibrates, and the vibrating force is transmitted to the tangential key; if the tangential key 3 is not loosened, pressurizing for 10 percent, maintaining the pressure for 5 minutes, simultaneously, impacting the tail of the T-shaped plate 5 by using the collision block 6, gradually pressurizing by using the method until the tangential key 3 is loosened, and then removing the tangential key 3.
In this embodiment, the jacking device is a 200t hydraulic jack.
In this embodiment, the chain block 2 is a chain block with a specification of 1 t.
In this embodiment, the dismantling platform 7 is located at a position 0.8 m-1.2 m below the tangential key 3.
In this embodiment, the length of the exposed bolt hole of the long bolt 9 is 100mm.
In this embodiment, in the third step, the welding seam between the T-shaped plate 5 and the tangential key 3 should be noted during the jacking, if the welding seam is torn, the jacking should be stopped immediately, and repair welding or re-welding is performed and then jacking is performed again.
In this embodiment, in the third step, after the T-shaped board 5 is re-welded with the tangential key 3, the T-shaped board is not lifted again within 12 hours.
Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.
Claims (7)
1. The jacking dismantling method of the tangential key of the carbon steel converter is characterized by comprising the following steps of:
step one, preparing construction;
1.1 Placing the converter in a state that the furnace mouth is upward, wherein tangential keys (3) are positioned at two sides of the upper end of a trunnion (8), and determining the big end and the small end of the tangential keys (3) according to the head of the tangential keys (3);
1.2 Preparing a working machine: preparing 1 electric welding machine, 1 gas cutting tool, 2T-shaped plates (5) with pin shafts, 2 long bolts (9) matched with the tangential key big head reserved bolt holes, 2 jacking devices (4), 4 chain blocks (2), 1 collision block (6), a plurality of steel wire ropes, a plurality of scaffold steel pipes and a plurality of springboards;
1.3 Checking whether sundries exist around the tangential keys and among the tangential keys, and if so, removing the sundries;
1.4 A band brake of the converter tilting device is in a locking state;
step two: dismantling the equipment arrangement;
2.1 A tangential key dismantling platform (7) is erected below the position where the tangential key (3) is located;
2.2 Screwing the long bolt (9) into a bolt hole reserved in the large end of the tangential key (3), exposing part of the length of the long bolt (9) outside the bolt hole, and cutting off the head of the long bolt (9) by using a gas cutting tool;
2.3 A long groove is formed in the lower portion of the T-shaped plate (5) according to the exposed length of the long bolt (9), then the long groove of the T-shaped plate (5) is sleeved into the exposed portion of the long bolt (9), and then the T-shaped plate (5) is welded with the tangential key (3) and the long bolt (9) respectively, so that firm welding is required;
2.4 A steel wire rope is hung on a platform beam (10) at the upper part of the T-shaped plate (5) and used for installing four chain blocks (2); 4 chain blocks (2) respectively hang the T-shaped plate (5), 2 jacking devices (4) and the collision blocks (6);
2.5 Installing the jacking device (4) between the T-shaped plate (5) and the trunnion by using the chain block (2), and simultaneously ensuring that one of the 2 jacking devices (4) is positioned on the small end side of the tangential key (3);
2.6 The collision block (6) is hung to a proper position by utilizing the chain block (2), so that the head of the collision block (6) is opposite to the middle position of the tail of the T-shaped plate (5);
step three: tangential key jacking;
3.1 2 jacking devices (4) are pressurized step by step and synchronously jacked; the method comprises the steps of pressurizing to 50% of rated jacking force of a jacking device (4) for the first time, observing loosening conditions of a tangential key (3), and simultaneously striking the tail of a T-shaped plate (5) by a striking block (6) to enable the T-shaped plate (5) to vibrate and transmitting vibration force to the tangential key; if the tangential key (3) is not loosened, pressurizing for 10 percent, maintaining the pressure for 5 minutes, simultaneously, impacting the tail of the T-shaped plate (5) by using the collision block (6), gradually pressurizing by using the method until the tangential key (3) is loosened, and then removing the tangential key (3).
2. The lifting and dismantling method for tangential keys of a carbon steel converter as claimed in claim 1, wherein the lifting device (4) is a 200t hydraulic jack.
3. The method for lifting and dismantling the tangential key of the carbon steel converter according to claim 1, wherein the chain block (2) is a chain block with the specification of 1 t.
4. The jacking dismantling method for the tangential keys of the carbon steel converter according to claim 1 is characterized in that the dismantling platform (7) is located at the position 0.8 m-1.2 m below the tangential keys (3).
5. The jacking dismantling method for the tangential keys of the carbon steel converter as claimed in claim 1, wherein the length of the exposed bolt holes of the long bolts (9) is 100mm.
6. The method for lifting and dismantling the tangential keys of the carbon steel converter according to claim 1, wherein in the third step, the welding seam condition between the T-shaped plate (5) and the tangential keys (3) is noted in the lifting process, if the welding seam is torn, the lifting is stopped immediately, and repair welding or re-welding is carried out and then lifting is carried out again.
7. The method for lifting and dismantling the tangential key of the carbon steel converter according to claim 6, wherein in the third step, after the T-shaped plate (5) and the tangential key (3) are welded again, the lifting is not needed again within 12 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911154802.7A CN110747311B (en) | 2019-11-22 | 2019-11-22 | Jacking dismantling method for tangential keys of carbon steel converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911154802.7A CN110747311B (en) | 2019-11-22 | 2019-11-22 | Jacking dismantling method for tangential keys of carbon steel converter |
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| CN110747311A CN110747311A (en) | 2020-02-04 |
| CN110747311B true CN110747311B (en) | 2023-05-12 |
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| CN201911154802.7A Active CN110747311B (en) | 2019-11-22 | 2019-11-22 | Jacking dismantling method for tangential keys of carbon steel converter |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08283821A (en) * | 1995-04-07 | 1996-10-29 | Kuchiku Kogyo Kk | Device for exchanging furnace bottom of converter |
| CN109517940A (en) * | 2019-01-28 | 2019-03-26 | 莱芜钢铁集团有限公司 | Trunnion of converter and the bonded connection device of gear wheel and tangential keys method for dismounting |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011369B (en) * | 2016-08-04 | 2018-02-02 | 攀钢集团工程技术有限公司 | Trunnion of converter bearing replacing method |
| CN106086295B (en) * | 2016-08-04 | 2018-05-25 | 攀钢集团工程技术有限公司 | Converter jacking apparatus |
| CN108161361B (en) * | 2017-12-27 | 2019-10-08 | 鞍钢重型机械有限责任公司 | A kind of method for dismounting of the tangential keys for converter trunnion ring trunnion |
-
2019
- 2019-11-22 CN CN201911154802.7A patent/CN110747311B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08283821A (en) * | 1995-04-07 | 1996-10-29 | Kuchiku Kogyo Kk | Device for exchanging furnace bottom of converter |
| CN109517940A (en) * | 2019-01-28 | 2019-03-26 | 莱芜钢铁集团有限公司 | Trunnion of converter and the bonded connection device of gear wheel and tangential keys method for dismounting |
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| CN110747311A (en) | 2020-02-04 |
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