CN105112585A - Blast furnace top steel ring mounting structure and mounting method thereof - Google Patents
Blast furnace top steel ring mounting structure and mounting method thereof Download PDFInfo
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- CN105112585A CN105112585A CN201510443740.7A CN201510443740A CN105112585A CN 105112585 A CN105112585 A CN 105112585A CN 201510443740 A CN201510443740 A CN 201510443740A CN 105112585 A CN105112585 A CN 105112585A
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- steel ring
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Abstract
The invention provides a blast furnace top steel ring mounting structure and a mounting method thereof. According to the invention, the effect that a furnace top steel ring is positioned in a mounting position after being lifted is realized by increasing positioning rib plates, the mounting accuracy of the furnace top steel ring is improved through levelness and elevation detection before, in and after a mounting process for multiple times, and welding quality of the furnace top steel ring is ensured by main welding seam welding area preheating and a symmetry welding process, therefore, the mounting quality and mounting accuracy of the whole blast furnace top steel ring are improved.
Description
Technical field
The present invention relates to adjustment of Top Charging Equipment installing area, particularly relate to a kind of blast furnace roof steel ring mounting structure and installation method thereof.
Background technology
Lip ring is the basis that top charging equipment is installed, its horizontal gradient error allows elevation difference≤3mm by metallurgical engineering construction reference, absolute altitude is by metallurgical engineering construction reference permissible variation ± 20mm, actual requirement is then higher, inclined extent directly has influence on operating mode and the work-ing life of top charging equipment, and therefore setting accuracy is the key in blast furnace top equipment installation.In prior art the installation of whole lip ring generally all lip ring and furnace shell assemble adjust after come by on-the-spot conventional welding processes, the specific weld technique do not formed for lip ring setting accuracy, effectively cannot ensure installation quality and the precision of lip ring.
Summary of the invention
The invention provides a kind of blast furnace roof steel ring mounting structure and installation method thereof, to improve installation quality and the precision of described lip ring.
In order to achieve the above object, the invention provides a kind of blast furnace roof steel ring mounting structure, it is installed on the top of last furnace shell, described blast furnace roof steel ring mounting structure comprises lip ring and some location gusset, described lip ring is positioned at the furnace throat on described furnace shell top, and be welded to connect with described furnace shell, described some location gusset is uniformly distributed in around described lip ring, and the two ends of described location gusset are welded to connect with described lip ring and described furnace shell respectively.
Further, the top of described last furnace shell and the cross section of lip ring all rounded.
Further, the quantity of described some location gusset is at least four pieces, and described some location gusset is along week of described lip ring along arranging, and angle is each other all equal.
Further, the quantity of described location gusset is 24 pieces.
Further, described location gusset comprises oblique section of horizontally disposed horizontal section and oblique setting, one end and the described lip ring of described horizontal section are welded to connect, and the other end is connected with one end of described oblique section, and the other end and the described furnace shell of described oblique section are welded to connect.
Further, the angle between described horizontal section and oblique section is obtuse angle.
The present invention also provides a kind of installation method of described blast furnace roof steel ring mounting structure, and it comprises: step one: by the installation site in described lip ring lifting to described furnace shell top furnace throat; Step 2: one end of some described location gusset is all welded to connect with described lip ring, another end-rack on described furnace shell, with the installation site of fixing described lip ring; Step 3: preheating is carried out to the main weld welding zone between described lip ring and furnace shell; Step 4: described lip ring and furnace shell are welded to connect in described main weld welding zone; Step 5: the other end of some described location gusset is all welded to connect with described furnace shell.
Further, in described step one, after the lifting work completing described lip ring, Detection and adjustment is carried out to its Hoisting Position, make its Hoisting Position meet installation requirement.
Further, in described step 2, the quantity of described location gusset is even number, and it is one group when welding with two, welds in the both sides of described lip ring symmetry with the location gusset of two in group simultaneously.
Further, in described step 4, described main weld welding zone comprises the main weld being above positioned at described furnace throat outside and the back side main weld being positioned at described furnace throat inside, first carry out the welding job of described main weld above, the welding job of main weld proceeds to a half above described, starts the welding job carrying out described back side main weld simultaneously.
Further, in described step 4, when welding the per pass weld seam of described main weld welding zone, its welding starting point is even number, described even number welding starting point is one group with two, lay respectively at the both sides of described lip ring symmetry with the welding starting point of two in group, and the welding direction of all welding starting points is clockwise or counterclockwise all simultaneously.
Further, after often welding the weld seam of specifying radian, all the levelness of described lip ring and absolute altitude were detected, and it was adjusted, met installation requirement to make it.
Further, in described step 5, after completing whole welding job, the welding quality of described lip ring and levelness are detected, and according to detected result, repair welding or reconditioning are carried out to described lip ring, meet installation requirement to make its welding quality and levelness.
Compared with prior art, the present invention has following beneficial effect:
Blast furnace roof steel ring mounting structure provided by the invention and installation method thereof are by locating the increase of gusset, achieve the installation site positioning work of lip ring after having lifted, detected by the repeatedly levelness before, during and after installation process and absolute altitude, add the setting accuracy of lip ring, and by the preheating of main weld welding zone and the weldprocedure that is symmetrically welded, ensure that the welding quality of lip ring, thus improve installation quality and the precision of whole lip ring.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described:
The one-sided sectional side view of the blast furnace roof steel ring mounting structure that Fig. 1 provides for the embodiment of the present invention;
The vertical view cutaway drawing of the blast furnace roof steel ring mounting structure that Fig. 2 provides for the embodiment of the present invention.
In fig. 1 and 2,
1: lip ring; 2: furnace shell; 3: location gusset; 31: horizontal section; 32: oblique section; 41: main weld above; 42: back side main weld.
Embodiment
The blast furnace roof steel ring mounting structure proposed the present invention below in conjunction with the drawings and specific embodiments and installation method thereof are described in further detail.According to the following describes and claims, advantages and features of the invention will be clearer.It should be noted that, accompanying drawing all adopts the form that simplifies very much and all uses non-ratio accurately, only in order to object that is convenient, the aid illustration embodiment of the present invention lucidly.
Core concept of the present invention is, a kind of blast furnace roof steel ring mounting structure and installation method thereof are provided, it is by the increase of location gusset, achieve the installation site positioning work of lip ring after having lifted, detected by the repeatedly levelness before, during and after installation process and absolute altitude, add the setting accuracy of lip ring, and by the preheating of main weld welding zone and the weldprocedure that is symmetrically welded, ensure that the welding quality of lip ring, thus improve installation quality and the precision of whole lip ring.
Please refer to Fig. 1 and Fig. 2, the one-sided sectional side view of the blast furnace roof steel ring mounting structure that Fig. 1 provides for the embodiment of the present invention; The vertical view cutaway drawing of the blast furnace roof steel ring mounting structure that Fig. 2 provides for the embodiment of the present invention.
As depicted in figs. 1 and 2, the embodiment of the present invention provides a kind of blast furnace roof steel ring mounting structure, it is installed on the top of last furnace shell 2, described blast furnace roof steel ring mounting structure comprises lip ring 1 and some location gusset 3, described lip ring 1 is positioned at the furnace throat on described furnace shell 2 top, and be welded to connect with described furnace shell 2, described some location gusset 3 is uniformly distributed in described lip ring 1 around, the two ends of described location gusset 3 are welded to connect with described lip ring 1 and described furnace shell 2 respectively, achieve the installation site positioning work of lip ring 1 after having lifted.
In the present embodiment, the top of described last furnace shell 2 and the cross section of lip ring 1 all rounded.
Further, the quantity of described some location gusset 3 is at least four pieces, described some location gusset 3 is arranged along the week edge of described lip ring 1, and angle is each other all equal, to make the uniform force between described lip ring 1 and furnace shell 2, in the present embodiment, the quantity of described location gusset 3 is 24 pieces (do not draw so much in Fig. 2, only make example).
Further, described location gusset 3 comprises oblique section 32 of horizontally disposed horizontal section 31 and oblique setting, one end and the described lip ring 1 of described horizontal section 31 are welded to connect, the other end is connected with one end of described oblique section 32, the other end and the described furnace shell 2 of described oblique section 32 are welded to connect, angle between described horizontal section 31 and oblique section 32 is obtuse angle, and the structure of described location gusset 3, shape can adapt to the shape of lip ring 1 and furnace shell 2, and plays location and reinforcement by connection effect.
The embodiment of the present invention also provides a kind of installation method of above-mentioned blast furnace roof steel ring mounting structure, and it comprises:
Step one: described lip ring 1 is lifted to the installation site in the furnace throat of described furnace shell 2 top;
Step 2: one end of some described location gusset 3 is all welded to connect with described lip ring 1, another end-rack on described furnace shell 2, with the installation site of fixing described lip ring 1;
Step 3: symmetrical preheating is carried out to the main weld welding zone between described lip ring 1 and furnace shell 2, preheated weld position, when weld seam can be made to shrink, component contraction equidirectional with it reduces the stressed of weld seam, slow down speed of cooling simultaneously, gas in weld seam and slag fully can be discharged, to reduce weld stress and to ensure weld metal quality, reduce crackle tendency;
Step 4: be welded to connect in described main weld welding zone with furnace shell 2 by described lip ring 1, before welding per pass weld seam, first should remove coating with air pressure gun, to play the effect eliminating welding stress;
Step 5: be all welded to connect with described furnace shell 2 by the other end of some described location gusset 3, just it is binding force in order to reduce weld seam that the weld seam of gusset 3 bottom, location finally welds, makes more freely expand with heat and contract with cold in main weld welding process.
Further, in described step one, after the lifting work completing described lip ring 1, Detection and adjustment is carried out to its Hoisting Position, make its Hoisting Position meet installation requirement.Concrete, the off centering, absolute altitude, diameter, circularity etc. of first tackling furnace shell 2 mounting interface are checked, and survey simultaneously, carry out reconditioning in conjunction with measuring result to furnace shell 2 internal orifice to lip ring 1 diameter itself.
Further, in described step 2, the quantity of described location gusset 3 is even number, and it is one group when welding with two, welds in the both sides of described lip ring 1 symmetry with the location gusset 3 of two in group simultaneously.
Further, in described step 4, described main weld welding zone comprises the main weld 51 being above positioned at described furnace throat outside and the back side main weld 52 being positioned at described furnace throat inside, the welding rod of diameter 4mm is first used to carry out the welding job of described main weld 51 above, use the welding rod of thinner diameter to carry out welding job to be conducive to reducing the generation of welding distortion, the welding job of main weld 51 proceeds to a half above described, use the welding rod of diameter 5mm to start the welding job carrying out described back side main weld 52 simultaneously, use the welding rod of thicker diameter to carry out welding job and be conducive to the quickening that back segment welds process.In the present embodiment, described welding rod all adopts low-hydrogen electrode, and it can effectively control hydrogen and enter weld seam, prevents the crackle caused by hydrogen.Further, in described step 4, when welding the per pass weld seam of described main weld welding zone, its welding starting point is even number, described even number welding starting point is one group with two, lay respectively at the both sides of described lip ring 1 symmetry with the welding starting point of two in group, and the welding direction of all welding starting points is clockwise or counterclockwise all simultaneously.In the present embodiment, the quantity of described welding starting point is four, and its week along described lip ring 1 is arranged along being respectively separated by 90 °.
Further, after often welding the weld seam of specifying radian, all the levelness of described lip ring 1 and absolute altitude were detected, and it was adjusted, met installation requirement to make it.Concrete, each welding turns over 30 °, welding of just stopping carry out levelness detection (with scale and spirit-leveling instrument along lip ring 18 directions totally 16 points carry out level measurement), observe the situation of each point absolute altitude, absolute altitude height point is welded, rule of thumb determine the length of weldering amount and weld seam to eliminate the generation of absolute altitude big error, continue again to be subsequently symmetrically welded, All the time carries out welding for front 3 road weld seams, from the 4th road weld seam, each welded 60 ° after observe absolute altitude, from the 7th road weld seam, each welded 90 ° after observe absolute altitude deviation, from the 10th road weld seam, each weldering after one deck observes an absolute altitude, by that analogy, the timed interval that absolute altitude is observed backward again lengthens gradually.
Because lip ring 1 welds with furnace shell 2, have additional again 24 pieces of location gussets 3, rigidity is very large, therefore welding distortion is very important, how to control welding distortion, ensure that the installation quality of lip ring is the key point of its weldprocedure, for this problem, in the embodiment of the present invention, take following measures:
(1) anti-welding deformation usually has prestrain method, postwelding to repair and controls the methods such as welding distortion, for this structure of lip ring 1, first two method all cannot realize, the method controlling welding distortion can only be adopted, way allows it become, become regularly, become within the specific limits, as far as possible the principle of Reducing distortion.Define balanced welding location gusset 3, symmetrical preheating in the embodiment of the present invention, be symmetrically welded, the operation of three symmetries is exactly allow weld seam expand with heat and contract with cold simultaneously, becomes in the same direction.Welding operation has the rule of first welding changeable, the rear weldering of changeable, many welderings and becoming less, therefore explicitly calls in the present embodiment, and by level bar frame at lip ring 1 top, Timing measurement is observed, and also specify and first welds high point, to ensure the levelness of lip ring 1.
(2) segmentation welding, the many welding bead welderings of little heat input multilayer, control interlayer temperature effectively reduce welding distortion, and knock to eliminate stress with air pressure gun.
(3) according to the detected result of lip ring 1, welding height point is placed in first weldering or groove larger portion position, and make this position shrinkage large compared with all the other positions, such postwelding can ensure the difference of height reducing lip ring 1 top.
Further, in described step 5, after completing whole welding job, the welding quality of described lip ring 1 and levelness are detected, and according to detected result, repair welding or reconditioning are carried out to described lip ring 1, meet installation requirement to make its welding quality and levelness.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if of the present invention these change and modification belongs within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (13)
1. a blast furnace roof steel ring mounting structure, be installed on the top of last furnace shell, it is characterized in that, comprise lip ring and some location gusset, described lip ring is positioned at the furnace throat on described furnace shell top, and be welded to connect with described furnace shell, described some location gusset is uniformly distributed in around described lip ring, and the two ends of described location gusset are welded to connect with described lip ring and described furnace shell respectively.
2. blast furnace roof steel ring mounting structure according to claim 1, is characterized in that, the top of described last furnace shell and the cross section of lip ring all rounded.
3. blast furnace roof steel ring mounting structure according to claim 2, is characterized in that, the quantity of described some location gusset is at least four pieces, and described some location gusset is along week of described lip ring along arranging, and angle is each other all equal.
4. blast furnace roof steel ring mounting structure according to claim 3, is characterized in that, the quantity of described location gusset is 24 pieces.
5. the blast furnace roof steel ring mounting structure according to any one of Claims 1-4, it is characterized in that, described location gusset comprises oblique section of horizontally disposed horizontal section and oblique setting, one end and the described lip ring of described horizontal section are welded to connect, the other end is connected with one end of described oblique section, and the other end and the described furnace shell of described oblique section are welded to connect.
6. blast furnace roof steel ring mounting structure according to claim 5, is characterized in that, the angle between described horizontal section and oblique section is obtuse angle.
7. an installation method for blast furnace roof steel ring mounting structure as claimed in claim 1, is characterized in that, comprising:
Step one: by the installation site in described lip ring lifting to described furnace shell top furnace throat;
Step 2: one end of some described location gusset is all welded to connect with described lip ring, another end-rack on described furnace shell, with the installation site of fixing described lip ring;
Step 3: preheating is carried out to the main weld welding zone between described lip ring and furnace shell;
Step 4: described lip ring and furnace shell are welded to connect in described main weld welding zone;
Step 5: the other end of some described location gusset is all welded to connect with described furnace shell.
8. the installation method of blast furnace roof steel ring mounting structure according to claim 7, it is characterized in that, in described step one, after the lifting work completing described lip ring, Detection and adjustment is carried out to its Hoisting Position, makes its Hoisting Position meet installation requirement.
9. the installation method of blast furnace roof steel ring mounting structure according to claim 7, it is characterized in that, in described step 2, the quantity of described location gusset is even number, it is one group when welding with two, welds in the both sides of described lip ring symmetry with the location gusset of two in group simultaneously.
10. the installation method of blast furnace roof steel ring mounting structure according to claim 7, it is characterized in that, in described step 4, described main weld welding zone comprises the main weld being above positioned at described furnace throat outside and the back side main weld being positioned at described furnace throat inside, first carry out the welding job of described main weld above, the welding job of main weld proceeds to a half above described, starts the welding job carrying out described back side main weld simultaneously.
The installation method of 11. blast furnace roof steel ring mounting structures according to claim 7, it is characterized in that, in described step 4, when welding the per pass weld seam of described main weld welding zone, its welding starting point is even number, described even number welding starting point is one group with two, lay respectively at the both sides of described lip ring symmetry, and the welding direction of all welding starting points is clockwise or counterclockwise all simultaneously with the welding starting point of two in group.
The installation method of 12. blast furnace roof steel ring mounting structures according to claim 11, it is characterized in that, after often welding the weld seam of specifying radian, all the levelness of described lip ring and absolute altitude are detected, and it is adjusted, meet installation requirement to make it.
The installation method of 13. blast furnace roof steel ring mounting structures according to any one of claim 7 to 12, it is characterized in that, in described step 5, after completing whole welding job, the welding quality of described lip ring and levelness are detected, and according to detected result, repair welding or reconditioning are carried out to described lip ring, meet installation requirement to make its welding quality and levelness.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510443740.7A CN105112585A (en) | 2015-07-24 | 2015-07-24 | Blast furnace top steel ring mounting structure and mounting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510443740.7A CN105112585A (en) | 2015-07-24 | 2015-07-24 | Blast furnace top steel ring mounting structure and mounting method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109759734A (en) * | 2019-02-28 | 2019-05-17 | 上海二十冶建设有限公司 | Blast furnace top flange installation method |
| CN115125345A (en) * | 2022-07-01 | 2022-09-30 | 广东韶钢松山股份有限公司 | Method for installing blast furnace bell-less top distributor steel ring |
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| CN201406436Y (en) * | 2009-05-18 | 2010-02-17 | 中冶实久建设有限公司 | Mounting structure of blast furnace top flange |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109759734A (en) * | 2019-02-28 | 2019-05-17 | 上海二十冶建设有限公司 | Blast furnace top flange installation method |
| CN115125345A (en) * | 2022-07-01 | 2022-09-30 | 广东韶钢松山股份有限公司 | Method for installing blast furnace bell-less top distributor steel ring |
| CN115125345B (en) * | 2022-07-01 | 2024-04-02 | 广东韶钢松山股份有限公司 | Method for installing steel ring of blast furnace bell-less top distributor |
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