CN103233087B - For the method that the downtake of blast furnace lifts - Google Patents
For the method that the downtake of blast furnace lifts Download PDFInfo
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- CN103233087B CN103233087B CN201310147626.0A CN201310147626A CN103233087B CN 103233087 B CN103233087 B CN 103233087B CN 201310147626 A CN201310147626 A CN 201310147626A CN 103233087 B CN103233087 B CN 103233087B
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Abstract
The invention discloses a kind of method for downtake lifting, described method comprises: A, determine the position of centre of gravity of downtake; B, determine the position of main suspension centre and auxiliary suspension centre according to position of centre of gravity, and make the cross section at main suspension centre place by center of gravity or relative to center of gravity slightly toward upper skew; C, the main suspension centre place the first hoisting rope and the second hoisting rope being fixedly attached to respectively downtake and auxiliary suspension centre place; D, equal predetermined lifting angle all the time at the angle of inclination of downtake state under, by downtake lifting to predetermined height, and between upper/lower terminal interface downtake being docked at downtake.Method provided by the present invention simplifies hoisting, improves lifting reliability, and reduces hoisting cost and shorten the lifting time.
Description
Technical field
The present invention relates to blast furnace lifting field, more particularly, the present invention relates to a kind of method that downtake for blast furnace lifts.
Background technology
In the installation process of blast furnace, the difficulty of the lifting of downtake is larger.Generally speaking, for the length of lifting components, weight and hoisting height, downtake is one of component maximum in blast furnace hoisting process, and also need its Accessory Members is installed in the hoisting process of downtake, such as ladder, upper pipe stand etc., this increases hoisting difficulty to a certain extent further.
Therefore, a kind of method that is simple, downtake lifting reliably is provided to be those skilled in the art's technical issues that need to address to make blast furnace mounting process simplify.
Summary of the invention
The object of the present invention is to provide a kind of method that downtake for blast furnace lifts, to simplify the hoisting of downtake, improve the reliability of downtake lifting, reduce hoisting cost and shorten the lifting time.
To achieve these goals, the invention provides a kind of method that downtake for blast furnace lifts, said method comprising the steps of:
A, determine the position of centre of gravity of downtake;
B, determine the position of main suspension centre and auxiliary suspension centre according to position of centre of gravity, and make the cross section at main suspension centre place by center of gravity or relative to center of gravity slightly toward upper skew;
C, the main suspension centre place the first hoisting rope and the second hoisting rope being fixedly attached to respectively downtake and auxiliary suspension centre place;
D, equal predetermined lifting angle all the time at the angle of inclination of downtake state under, by downtake lifting to predetermined height, and downtake is docked between upper/lower terminal interface.
Preferably, when the cross section at main suspension centre place passes through the center of gravity of downtake, auxiliary suspension centre is positioned at above and below main suspension centre; When main suspension centre relative to center of gravity slightly toward upper skew time, auxiliary suspension centre is positioned at the below of center of gravity.
Preferably, step C comprises:
C1, main card tool and auxiliary jig are respectively fixed to main suspension centre and auxiliary suspension centre;
C2, the first hoisting rope and the second hoisting rope are connected respectively to downtake and auxiliary jig, and fix the first hoisting rope and the relative position relation between the second hoisting rope and downtake respectively by described main card tool and auxiliary jig.
Preferably, main card tool and auxiliary jig are welded to main suspension centre and auxiliary suspension centre.
Preferably, one end of the first hoisting rope is connected to downtake, and the other end is connected to the suspension hook of hanging device, and one end of the second hoisting rope is connected to auxiliary jig, and the other end is connected to the suspension hook of hanging device.
Preferably, the first hoisting rope is connected to downtake along the circumference of downtake, and the part contacted with downtake of the first hoisting rope is positioned at identical cross section with main suspension centre.
Preferably, step D comprises:
D1, before lifting downtake, by the angle of inclination regulating the lifting length of the second hoisting rope to regulate downtake, equal predetermined lifting angle to make the angle of inclination of downtake;
D2, when making the angle of inclination of downtake constant, by downtake lifting to predetermined height;
D3, downtake is docked to downtake upper/lower terminal interface between.
Preferably, described second hoisting rope is jack.
When needing the lifting operation carrying out downtake, first the first hoisting rope and the second hoisting rope to be connected respectively to the predetermined main suspension centre of downtake and auxiliary suspension centre place.If the cross section of main suspension centre is by the center of gravity of downtake, so in hoisting process, the first hoisting rope also can all the time through the center of gravity of downtake, downtake is just in stress balance state all the time, and the second hoisting rope is stressed or be subject to relative to the negligible micro-power of the first hoisting rope hardly.If the cross section of main suspension centre relative to center of gravity slightly toward upper skew, so in hoisting process, the first hoisting rope is positioned at the center of gravity of downtake position slightly on the upper side, second hoisting rope then bears certain pulling force, downtake keeps equilibrium state under the pulling force effect of gravity, the first hoisting rope and the second hoisting rope, and the pulling force on the first hoisting rope obviously will be greater than the pulling force of the second hoisting rope, that is, the main hoisting point position by changing the first hoisting rope can change the pulling force that the second hoisting rope is subject to significantly; In addition, in above-mentioned two situations, all can be regulated the angle of inclination of downtake by the lifting length changing the second hoisting rope, ensure in hoisting process, the angle of inclination of downtake is equal with predetermined lifting angle all the time.After by downtake lifting to predetermined height, just downtake can be docked to the docking port place of upper and lower ends, then the first hoisting rope and the second hoisting rope etc. are disassembled the lifting operation just completing downtake.
Hanging method provided by the present invention, first hoisting rope mainly bears pulling force, and the second hoisting rope does not stress or stressed less substantially, the adjustment at the angle of inclination to downtake can be realized more accurately and easily by the lifting length of adjustment second hoisting rope simultaneously, thus significantly simplify the hoisting of downtake, improve the reliability of downtake lifting, and reduce hoisting difficulty and construction cost, shorten the lifting operation time.
Accompanying drawing explanation
Fig. 1 is the lifting schematic diagram that downtake is according to an embodiment of the invention shown;
Fig. 2 is the lifting schematic diagram of the downtake illustrated according to another embodiment of the present invention.
Embodiment
Core of the present invention there are provided a kind of method that downtake for blast furnace lifts, and to simplify the hoisting of downtake, improves the reliability of downtake lifting, reduces hoisting cost and time.
In order to enable those skilled in the art better understand the present invention, below by describing the present invention in conjunction with the accompanying drawings and embodiments.
Fig. 1 is the lifting schematic diagram that downtake is according to an embodiment of the invention shown, Fig. 2 is the lifting schematic diagram of the downtake illustrated according to another embodiment of the present invention.
See figures.1.and.2, when carrying out the lifting operation of downtake 1, the method that downtake 1 provided by the present invention lifts comprises the following steps:
S1, determines the center of gravity G position of downtake 1.
In an embodiment of the present invention, downtake 1 is straight tube, determines the center of gravity G position of downtake 1 by Theoretical Calculation roughly.
S2, determines the position of main suspension centre 4 and auxiliary suspension centre 5 according to center of gravity G position, and make the cross section at landlord's suspension centre 4 place by center of gravity G or relative to center of gravity G slightly toward upper skew.
In the process of lifting downtake 1, need to regulate downtake 1 relative to the tilt angle alpha on ground in advance by adjusting the second hoisting rope 3, and this tilt angle alpha needs to equal predetermined lifting angle, this predetermined lifting angle can ensure to suitable height, no longer to need to readjust tilt angle alpha downtake can be connected on the docking port of upper and lower end being lifted by downtake 1.In an embodiment of the present invention, described tilt angle alpha is the angle between the axis of sea line and downtake 1.
Main suspension centre 4 can be positioned at following two kinds of positions substantially.
For the first position, as shown in Figure 1, main suspension centre 4 is positioned on the cross section identical with center of gravity G of downtake 1.In this case, can arrange two auxiliary suspension centres 5, described two auxiliary suspension centres 5 lay respectively at the both sides up and down of main suspension centre 4 or center of gravity G, and that is, auxiliary suspension centre 5 lays respectively at above and below main suspension centre 4.Can set according to the operating environment of reality for the axial distance between auxiliary suspension centre 5 and main suspension centre 4, as long as the adjustment at the angle of inclination of lifting below and downtake 1 can be facilitated.
For the second position, as shown in Figure 2, main suspension centre 4 and center of gravity G are positioned on the different cross section of downtake 1, and main suspension centre 4 upwards offsets certain distance relative to center of gravity G slightly along the axis of downtake 1.In this case, only can arrange an auxiliary suspension centre 5, this auxiliary suspension centre 5 is arranged on the below of center of gravity G.For the position of auxiliary suspension centre 5, can set according to the operating environment of reality, as long as the adjustment at the angle of inclination of lifting below and downtake 1 can be facilitated.
S3, the first hoisting rope 2 and the second hoisting rope 3 are fixedly attached to respectively main suspension centre 4 place and auxiliary suspension centre 5 place of downtake 1.
The embodiment first hoisting rope 2 and the second hoisting rope 3 being connected to respectively securely main suspension centre 4 place of downtake 1 and auxiliary suspension centre 5 place is a lot, such as, main card tool and auxiliary jig can be fixed respectively at main suspension centre 4 and auxiliary suspension centre 5 place, particularly can by welding the fixed relationship realized between suspension centre and jig.Then, first hoisting rope 2 is connected to downtake 1, and utilize main card tool to fix relative position relation between downtake 1 and the first hoisting rope 2, particularly can by the first hoisting rope 2 according to making the first hoisting rope 2 through main card tool along the circumference of downtake 1 around the mode of downtake 1, thus make the first hoisting rope 1 can be positioned at identical cross section with main suspension centre 4 with the contact part of downtake 1, as depicted in figs. 1 and 2, and other parts of the first hoisting rope 2 are in vertical state roughly.As mentioned above, also there is two states in the first hoisting rope 2, and a kind of is center of gravity G by downtake 1, and another kind is slightly toward upper skew relative to center of gravity G.For the second hoisting rope 3, auxiliary jig can be connected to, particularly, can directly be hung on auxiliary jig.
One end of first hoisting rope 2 can be connected to downtake 1, and the other end can be connected to outside hanging device, such as, on the suspension hook of crane or tackle purchase.Equally, one end of the second hoisting rope 3 can be connected to auxiliary jig, and the other end can be connected to outside hanging device, such as, on the suspension hook of crane or tackle purchase.
When the cross section at main suspension centre 4 place passes through the center of gravity G of downtake 1, owing to being provided with two the auxiliary suspension centres 5 laying respectively at main suspension centre about 4 both sides, so two the second hoisting ropes 3 correspondingly should be connected respectively.This is because, if main suspension centre 4 is by center of gravity G, then in hoisting process, downtake 1 is in equilibrium state under the pulling force effect of himself gravity and the first hoisting rope 2, its angle of inclination may be in the state of random change, therefore need all arrange auxiliary suspension centre 5 in the both sides of main suspension centre 4 and correspondingly respectively connect second hoisting rope 3 at two auxiliary suspension centre 5 places, so that the object regulated the angle of inclination of downtake 1 can be realized.
In addition, may cause regulating inconvenient operation in inconvenient or hoisting process to the angle of inclination of downtake 1 because main suspension centre 4 not only makes to need to arrange two the second hoisting ropes 3 by center of gravity G simultaneously, therefore, the present invention preferably makes main suspension centre 4 relative to center of gravity G slightly toward upper skew.When the cross section at main suspension centre 4 place upwards offsets slightly relative to center of gravity G, because the below only at center of gravity G is provided with an auxiliary suspension centre 5, so second hoisting rope 3 correspondingly only can be connected.
In addition, the present invention is not limited to above form, in the center of gravity place of downtake 1 or center of gravity position slightly on the upper side, namely, the position at main suspension centre 3 place, when having the structure formation of reducing, and the diameter of the position at main suspension centre 4 place is less relative to other parts, first hoisting rope 2 can being connected to described reducing place, at this moment also can ensureing when not arranging main card tool Relative sliding can not occur between the first hoisting rope 2 and downtake 1.In addition, other suitable consolidated forms can also be adopted to fix the first hoisting rope 2 and the second hoisting rope 3, as long as the first hoisting rope 2 can be ensured and Relative sliding can not occur between the second hoisting rope 3 and downtake 1.
When lifting, the first hoisting rope 2 mainly plays the effect of lifting, needs to bear larger pulling force, therefore, has higher requirement to the intensity of the first hoisting rope 2.Second hoisting rope 3 is mainly used for regulating the angle of inclination of downtake 1, therefore, and less demanding to the intensity of the second hoisting rope 3, but should require that the length of the second hoisting rope 3 is easy to regulate, such as, jack can be adopted as the second hoisting rope 3.
S4, under the state that the tilt angle alpha of downtake 1 equals predetermined lifting angle all the time, lifts downtake 1 to predetermined height, and between upper/lower terminal fixed interface downtake 1 being docked at downtake.Wherein, the upper/lower terminal of downtake described here completes lifting in advance, that is, the upper end of downtake has been arranged on blast furnace, and the lower end of downtake has been arranged on fly-ash separator.
The peripheral hardware hanging device of such as tackle purchase or crane etc. can be adopted to carry out the lifting of downtake 1.
Before the lifting carrying out downtake 1, need to proceed to predetermined lifting angle to the tilt angle alpha of downtake 1, thus when lifting and follow-up docking time all no longer need the tilt angle alpha regulating downtake 1.Specifically, after the first hoisting rope 2 and the second hoisting rope 3 are connected on downtake 1, can according to the predetermined lifting angle of downtake 1 (namely, angle when this predetermined lifting angle is docking downtake 1), the length of the length of the first hoisting rope 2 and distance calculating place second hoisting rope 3 between auxiliary suspension centre 5 and main suspension centre 4, according to the predetermined length of calculating place, the length of the second hoisting rope 3 is regulated, make the lifting length of the second hoisting rope 3 equal described in the predetermined length that calculates, just the tilt angle alpha of downtake 1 can be adjusted to equal with predetermined lifting angle, carry out the lifting of downtake 1 afterwards again.Lifting length of the present invention is from auxiliary suspension centre 5 to the length the suspension hook of the peripheral hardware hanging device of connection second hoisting rope 3.Like this, in hoisting process, just can ensure that the tilt angle alpha of downtake 1 can not change, and equal pre-determined tilt angle all the time.
In the angle of inclination process regulating downtake 1, as shown in Figure 2, when the tilt angle alpha of downtake 1 is excessive, the lifting length of the second hoisting rope 3 can be shortened tilt angle alpha to be decreased to the angle of installing downtake 1; When tilt angle alpha is too small, the lifting length of the second hoisting rope 3 can be increased tilt angle alpha to be increased to the angle of installing downtake 1.
When the first hoisting rope 2 and main suspension centre 4 pass through the center of gravity G of downtake 1, in hoisting process, downtake 1 is in stress balance state all the time under the pulling force of the first hoisting rope 2 and the effect of self gravitation, and, under the coordinative role laying respectively at the second hoisting rope 3 above and below main suspension centre 4, (namely the tilt angle alpha of downtake 1 maintains the angle of inclination of original start substantially, predetermined lifting angle) and larger change can not be there is, and the second hoisting rope 3 is stressed or be subject to relative to the negligible micro-power of the first hoisting rope 2 hardly, thus can easily downtake 1 be lifted to predetermined height, and carry out butt-joint operation.
When the first hoisting rope 2 is positioned at the center of gravity of downtake 1 position on the upper side, second hoisting rope 3 can bear certain pulling force, downtake 1 keeps stress balance state under the pulling force effect of self gravitation, the first hoisting rope 2 and the second hoisting rope 3, and the pulling force on the first hoisting rope 2 obviously will be greater than the pulling force on the second hoisting rope 3, that is, the first hoisting rope 2 bears the pulling force of the overwhelming majority substantially.
Although in these cases, the pulling force that the pulling force that the second hoisting rope 3 is subject to will be subject to much smaller than the first hoisting rope 2, the pulling force of the second hoisting rope 3 can not exceed maximum supporting capacity.Simultaneously, distance between main suspension centre 4 and center of gravity G changes, the pulling force that then the second hoisting rope 3 is subject to will change simultaneously, therefore, also this situation should be considered, to ensure that the pulling force that the second hoisting rope 3 is subject to can not exceed the maximum pull that can bear when determining the position of main suspension centre and auxiliary suspension centre in step s 2.Therefore, the pulling force size that can also be subject to according to the second hoisting rope 3 chooses suitable jack as the second hoisting rope 3.
As mentioned above, when needs lifting downtake 1, first the first hoisting rope 2 and the second hoisting rope 3 are connected to main suspension centre 4 and auxiliary suspension centre 5 place of downtake 1, and the first hoisting rope 2 and the relative position relation of the second hoisting rope 3 between downtake 1 are fixed; Utilize the hanging device of peripheral hardware to carry out the lifting of downtake 1, can be regulated by the tilt angle alpha of length to downtake 1 of adjustment second hoisting rope 3 before lifting, ensure that tilt angle alpha equals predetermined lifting angle; When the tilt angle alpha of downtake 1 equals predetermined lifting angle all the time, just downtake 1 lifts to predetermined docking height, then downtake 1 is docked at upper/lower terminal docking port place, just can complete the lifting of downtake 1; Finally the first hoisting rope 2 and the second hoisting rope 3 are disassembled from downtake 1.
The method lifted for downtake 1 provided by the present invention, first hoisting rope 2 mainly bears pulling force, and the second hoisting rope 3 does not stress or stressed less substantially, can to be realized more accurately and easily the adjustment at the angle of inclination of downtake 1 by the lifting length of adjustment second hoisting rope 3 and the pulling force that the second hoisting rope 3 can not be made to be subject to is excessive simultaneously, thus significantly simplify the hoisting of downtake, improve the reliability of downtake lifting, and reduce lifting operation difficulty and cost, shorten the lifting operation time.
In addition, lifting principle provided by the present invention, except for lifting except downtake, also may be used for the lifting operation of other main equipments.
Above the method that the downtake for blast furnace provided by the present invention lifts is described in detail; although show and describe some embodiments of the present invention; but those skilled in the art should understand that; when not departing from by the principle of the present invention of claim and its scope of equivalents thereof and spirit; can to modify to these embodiments and perfect, these amendments and improve also should in protection scope of the present invention.
Claims (7)
1., for the method that the downtake of blast furnace lifts, it is characterized in that, comprising:
A, determine the position of centre of gravity of downtake;
B, determine the position of main suspension centre and auxiliary suspension centre according to position of centre of gravity, and make the cross section at main suspension centre place by center of gravity or relative to center of gravity slightly toward upper skew, when the cross section at main suspension centre place passes through the center of gravity of downtake, auxiliary suspension centre is positioned at above and below main suspension centre, when main suspension centre relative to center of gravity slightly toward upper skew time, auxiliary suspension centre is positioned at the below of center of gravity;
C, the main suspension centre place the first hoisting rope and the second hoisting rope being fixedly attached to respectively downtake and auxiliary suspension centre place;
D, downtake adjusted to predetermined lifting angle by the second hoisting rope, when the second hoisting rope substantially do not stress or stressed very little, by downtake lifting to predetermined height, and between upper/lower terminal interface downtake being docked at downtake.
2. method according to claim 1, is characterized in that, step C comprises:
C1, main card tool and auxiliary jig are respectively fixed to main suspension centre and auxiliary suspension centre;
C2, the first hoisting rope and the second hoisting rope are connected respectively to downtake and auxiliary jig, and fix the first hoisting rope and the relative position relation between the second hoisting rope and downtake respectively by described main card tool and auxiliary jig.
3. method according to claim 2, is characterized in that, main card tool and auxiliary jig are welded to main suspension centre and auxiliary suspension centre.
4. method according to claim 2, is characterized in that, one end of the first hoisting rope is connected to downtake, and the other end is connected to the suspension hook of hanging device, and one end of the second hoisting rope is connected to auxiliary jig, and the other end is connected to the suspension hook of hanging device.
5. method according to claim 1, is characterized in that, the first hoisting rope is connected to downtake along the circumference of downtake, and the part contacted with downtake of the first hoisting rope is positioned at identical cross section with main suspension centre.
6. method according to claim 1, is characterized in that, step D comprises:
D1, before lifting downtake, by the angle of inclination regulating the lifting length of the second hoisting rope to regulate downtake, equal predetermined lifting angle to make the angle of inclination of downtake;
D2, when making the angle of inclination of downtake constant, by downtake lifting to predetermined height;
D3, downtake is docked to downtake upper/lower terminal interface between.
7. the method according to claim 1 to 6 any one, is characterized in that, described second hoisting rope is jack.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310147626.0A CN103233087B (en) | 2013-04-25 | 2013-04-25 | For the method that the downtake of blast furnace lifts |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310147626.0A CN103233087B (en) | 2013-04-25 | 2013-04-25 | For the method that the downtake of blast furnace lifts |
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| CN103233087A CN103233087A (en) | 2013-08-07 |
| CN103233087B true CN103233087B (en) | 2015-09-16 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104878139B (en) * | 2015-05-28 | 2017-01-04 | 中国十七冶集团有限公司 | Blast furnace Y-type three way type installation method of formula down-comer integral hoisting |
| CN111723429A (en) * | 2020-06-29 | 2020-09-29 | 鄂尔多斯市诚泰建设有限公司 | Method for determining lifting point of multi-angle inclined arch rib segment and lifting method |
| CN112064506B (en) * | 2020-08-04 | 2023-06-02 | 中铁上海工程局集团有限公司 | Space attitude accurate adjustment method for steel box arch rib bidirectional inclined closure section |
| CN112481437B (en) * | 2020-11-27 | 2022-07-08 | 上海宝冶冶金工程有限公司 | Blast furnace Y-shaped downcomer dismounting and replacing method |
| CN113213351B (en) * | 2021-04-15 | 2022-10-11 | 北京首钢建设集团有限公司 | Method for quickly installing downcomer of large blast furnace |
| CN114044433B (en) * | 2021-11-19 | 2023-10-27 | 上海宝冶集团有限公司 | Special-shaped pipeline hoisting method for narrow space |
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| CN102851421A (en) * | 2012-04-18 | 2013-01-02 | 天津二十冶建设有限公司 | Method for installing blast furnace single-tube downcomer |
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| CN102851421A (en) * | 2012-04-18 | 2013-01-02 | 天津二十冶建设有限公司 | Method for installing blast furnace single-tube downcomer |
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