CN112809236B - Sectional assembling method for mixing machine barrel - Google Patents
Sectional assembling method for mixing machine barrel Download PDFInfo
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- CN112809236B CN112809236B CN202110163516.8A CN202110163516A CN112809236B CN 112809236 B CN112809236 B CN 112809236B CN 202110163516 A CN202110163516 A CN 202110163516A CN 112809236 B CN112809236 B CN 112809236B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/12—Vessels
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Abstract
The invention relates to the field of mixers, in particular to a method for assembling mixer cylinders in sections, wherein each mixer cylinder comprises an A-section rolling ring, a B-section rolling ring and a transition section cylinder section; the section A rolling ring is connected with the section B rolling ring through a transition section cylindrical section; one sides of the A section rolling ring and the B section rolling ring, which are far away from the transition section cylindrical shell, are connected with a D section cylindrical shell; the assembling method comprises the following steps: step 1: preparation of a construction site: step 2: the A section is rolled and the B section is rolled and hung: assembling the section A rolling ring, the section B rolling ring and the transition section cylindrical section; and step 3: d, assembling the cylinder sections; and 4, step 4: and (3) after the step 3 is finished, the main structure of the mixing machine barrel is connected, and the acceptance is checked. The invention discloses a sectional assembling method for a mixing machine barrel, which can conveniently, quickly and accurately realize the connection between all barrel sections or rolling rings and is convenient for the integral assembly of the mixing machine barrel sections.
Description
Technical Field
The invention relates to the field of mixers, in particular to a method for assembling mixer barrels in sections.
Background
The mixer is a device used for mixing raw materials by a sintering machine system of a steel company, and a mixer cylinder is an important component of the mixer.
The main characteristics of the mixer barrel are as follows: the diameter of the cylinder is larger, the length of the cylinder is longer, the coaxiality of the cylinder is less than or equal to phi 2mm, and the end jump of the joint surface of the large gear flange is less than or equal to 1 mm; the material difference of the corresponding parts is large, the rigidity is large, the weldability is poor, and the welding quality directly determines the manufacturing precision of the mixer; the ultra-long and ultra-wide characteristics are inconvenient for transportation and the like.
Therefore, in order to facilitate transportation of the mixer barrel, the structure of the mixer barrel needs to be optimized, and meanwhile, the assembly method of the traditional mixer barrel is optimized.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a sectional type mixer barrel structure and an assembling method for the sectional type mixer barrel.
In order to achieve the purpose, the invention adopts the technical scheme that:
a mixing machine barrel sectional assembly method is disclosed, wherein the mixing machine barrel comprises an A section rolling ring, a B section rolling ring and a transition section barrel section; the section A rolling ring is connected with the section B rolling ring through a transition section cylindrical shell; one sides of the A-section rolling ring and the B-section rolling ring, which are far away from the transition section cylindrical shell, are connected with a D-section cylindrical shell; the assembling method comprises the following steps:
step 1: preparation of a construction site: rechecking the surface, the appearance and the related size of the component to be assembled to ensure the integrity of equipment and facilities;
and 2, step: the A section is rolled and the B section is rolled and hung: assembling the section A rolling ring, the section B rolling ring and the transition section cylindrical shell; the A section rolling ring and the B section rolling ring are respectively in gapless butt joint with the transition section cylindrical shell; respectively welding the section A rolling ring and the section B rolling ring with the transition section cylindrical section;
and step 3: after the step 2 is finished, respectively butting the two D-section cylindrical sections on one sides of the A-section rolling ring and the B-section rolling ring, which are far away from the transition section cylindrical section; the section A rolling ring is welded with the section D cylindrical sections correspondingly connected, and the section B rolling ring is welded with the section D cylindrical sections correspondingly connected;
and 4, step 4: and (3) after the step 3 is finished, finishing the connection of the main structure of the mixing machine cylinder.
The transition section shell ring comprises a C1 section shell ring, a C2 section shell ring and an E section shell ring; the A section rolling ring is connected with a C1 section cylindrical shell section in the transition section cylindrical shell section to form a first part; the B section rolling ring is connected with a C2 section cylindrical section in the transition section cylindrical section to form a second part; and after the C1 section of cylindrical shell section and the A section of rolling ring and the C2 section of cylindrical shell section and the B section of rolling ring are welded, the first component and the second component are respectively butted with the E section of cylindrical shell section, and after the butting is finished, the first component and the E section of cylindrical shell section and the second component are respectively welded with the E section of cylindrical shell section.
And the welding mode among any adjacent parts of the C1 section cylinder section, the C2 section cylinder section, the E section cylinder section, the A section rolling ring, the B section rolling ring and the D section cylinder section is submerged automatic arc welding.
And welding ring grooves are formed in the joint of adjacent parts in the C1 section cylindrical shell, the C2 section cylindrical shell, the E section cylindrical shell, the A section rolling ring, the B section rolling ring and the D section cylindrical shell.
The welding ring groove comprises an outer welding ring groove and an inner welding ring groove; the depth and the height of the outer welding ring groove are both larger than those of the inner welding ring groove; the outer welding ring grooves are distributed on the inner wall of the mixing machine barrel.
The vertical cross sections of the outer welding ring groove and the inner welding ring groove are isosceles trapezoids.
When the mixing machine barrel is assembled and welded, welding preheating is carried out before welding; the mixer barrel is welded and preheated by adopting an annular gas flame uniform heater, and is insulated by adopting a far infrared heater.
The mixer barrel is placed on the supporting roller shaft, and the preheating temperature of the mixer barrel is controlled to be 100-150 ℃.
And after the mixing machine barrel is welded, the whole mixing machine barrel is subjected to heat treatment by adopting a trolley type heat treatment furnace.
And after any adjacent part of the C1 section cylindrical shell, the C2 section cylindrical shell, the E section cylindrical shell, the A section rolling ring, the B section rolling ring and the D section cylindrical shell is welded, the coaxiality of the welded mixing cylindrical shell is measured.
The invention has the advantages that:
the invention discloses a sectional assembling method for a mixing machine barrel, which can conveniently, quickly and accurately realize the connection among all barrel sections or rolling rings and facilitate the integral assembly of the mixing machine barrel sections; in addition, a new welding structure is matched and heat treatment is carried out; the welding strength between the shell sections or the rolling rings can be improved, the residual stress of the welding line is avoided, and the crack resistance of the welding line is well improved.
Drawings
The contents of the expressions in the various figures of the present specification and the labels in the figures are briefly described as follows:
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic view of the structure of the welding ring groove of the present invention.
The labels in the above figures are:
1. the section A of rolling ring, the section 2 of rolling ring, the section B of rolling ring, the section 3 of cylinder section, the section C1 of cylinder section, the section 4 of cylinder section, the section C2 of cylinder section, the section 5 of cylinder section E of cylinder section, and the welding ring groove; 61. an outer welding ring groove 62 and an inner welding ring groove; 7. and D, a cylindrical section.
Detailed Description
The following description of preferred embodiments of the invention will be made in further detail with reference to the accompanying drawings.
A mixer barrel sectional assembly method comprises an A section rolling ring 1, a B section rolling ring 2 and a transition section barrel section 3; the A section rolling ring 1 is connected with the B section rolling ring 2 through a transition section cylindrical section 3; the side, far away from the transition section cylindrical shell 3, of the A section rolling ring 1 and the B section rolling ring 2 is connected with a D section cylindrical shell 7; the assembling method comprises the following steps:
step 1: preparation of a construction site: rechecking the surface, the appearance and the related size of the component to be assembled to ensure the integrity of equipment and facilities;
step 2: the A section rolling ring 1 and the B section rolling ring 2 are hoisted: assembling the section A rolling ring 1, the section B rolling ring 2 and the transition section cylindrical section; the A section rolling ring 1 and the B section rolling ring 2 are respectively in gapless butt joint with the transition section cylindrical shell; respectively welding the section A rolling ring 1 and the section B rolling ring 2 with the transition section cylindrical section;
and step 3: after the step 2 is finished, respectively butting the two D-section cylindrical sections 7 on the sides of the A-section rolling ring 1 and the B-section rolling ring 2 far away from the transition section cylindrical section 3; the section A rolling ring 1 is welded with the section D cylindrical shell section 7 correspondingly connected, and the section B rolling ring 2 is welded with the section D cylindrical shell section 7 correspondingly connected;
and 4, step 4: and (3) after the step 3 is finished, finishing the connection of the main structure of the mixing machine cylinder.
The invention discloses a sectional assembly method for a mixing machine barrel, and discloses a sectional assembly method for a mixing machine barrel; the assembling method disclosed by the invention can conveniently, quickly and accurately realize the connection of all the cylinder sections or rolling rings, and is convenient for the integral assembly of the mixing machine cylinder sections.
Preferably, the transition section shell section 3 comprises a C1 section shell section 3, a C2 section shell section 4 and an E section shell section 5; the A section rolling ring 1 is connected with a C1 section cylindrical shell section 3 in a transition section cylindrical shell section 3 to form a first part; the B section rolling ring 2 is connected with a C2 section cylindrical shell section 4 in the transition section cylindrical shell section 3 to form a second part; after welding is completed between the C1 section of the cylindrical shell section 3 and the A section of the rolling ring 1 and between the C2 section of the cylindrical shell section 4 and the B section of the rolling ring 2, the first component and the second component are respectively butted with the E section of the cylindrical shell section 5, and after the butting is completed, the first component and the E section of the cylindrical shell section 5 and between the second component and the E section of the cylindrical shell section 5 are respectively welded; in the actual welding, the front and back sequence of the welding of the first part and the second part and the E-section shell section 5 is also required, wherein the specific requirement is related to the production process of the first part and the second part; specifically, in the invention, after the first part is welded, when the E-section cylindrical section 5 is connected, the first part is required to be connected with the E-section cylindrical section 5, and similarly, when the second part is welded with the first part, the second part is required to be connected with the E-section cylindrical section 5, so that the connection mode can avoid continuous welding procedures and avoid continuous accumulation of welding stress at two ends of the same cylindrical section; affecting the overall coaxiality of subsequent mixer shell sections.
Preferably, in the invention, the welding mode between any adjacent parts of the C1 section cylindrical shell section 3, the C2 section cylindrical shell section 4, the E section cylindrical shell section 5, the A section rolling ring 1, the B section rolling ring 2 and the D section cylindrical shell section 7 is submerged automatic arc welding; that is, when the mixer shell section of the present invention is integrally assembled, it is required to perform a welding operation on each component of the mixer shell section by using a submerged automatic arc welding; the welding method comprises the following steps: automatic submerged arc welding, wherein a variable frequency power device and a special tool are adopted to realize the automation of all welding; selection of welding materials: welding wire H08MnA, H08A, flux 431; certainly, during specific operation, a welding material is selected according to the requirement of a product on the welding performance, and the welding strength is not lower than that of a base material; when the invention is actually used, the welding material manual electric arc welding adopts a low-hydrogen type welding rod J507, and the submerged automatic arc welding adopts H08MnA matched with HJ 431.
In addition, preferably, in the invention, a welding ring groove 6 is arranged at the joint of adjacent parts in the C1 section cylindrical shell section 3, the C2 section cylindrical shell section 4, the E section cylindrical shell section 5, the A section rolling ring 1, the B section rolling ring 2 and the D section cylindrical shell section 7; here, the welding ring groove 6 is arranged at the edge of each cylinder section or the cylinder section and the rolling ring of the mixing machine cylinder section, and a ring groove is arranged at the end part of the adjacent cylinder section or the cylinder section and the rolling ring and forms the welding ring groove 6 after butt joint; the arrangement of the welding ring groove 6 facilitates the stacking of welding wires, so that the welding strength between adjacent shell sections or between the shell sections and the rolling ring can be ensured; the problem of insufficient welding strength of the traditional direct butt joint on a plane is avoided.
In addition, in the present invention, the welding ring groove 6 preferably includes an outer welding ring groove 61 and an inner welding ring groove 62; namely, the welding mode of the invention adopts multilayer multi-pass welding; in order to ensure the welding strength between adjacent parts, the outer welding ring grooves 61 are distributed on the inner wall of the mixing machine cylinder in the invention; the inner welding ring grooves 62 are distributed on the outer wall of the mixer barrel; the invention uses the matching of the internal and external welding modes, thereby better ensuring the connection strength among all the parts of the mixing machine cylinder section; in addition, preferably, the vertical cross sections of the outer welding ring groove 61 and the inner welding ring groove 62 are isosceles trapezoids; in a sectional view, the outer welding ring groove 61 and the inner welding ring groove 62 are two U-shaped grooves; the larger side of the opening is positioned at the outer side; such a weld can reduce stress concentration within the welded weld; in addition, the outer welding ring groove 61 and the inner welding ring groove 62 are communicated, so that the outer welding seam and the inner welding seam can be connected during welding, and the penetration during welding of parts can be ensured, so that the welding strength is ensured, and in addition, the depth and the height of the outer welding ring groove 61 are greater than those of the inner welding ring groove 62; by the arrangement, the welding strength of the inner side of the mixing machine cylinder section is higher than that of the outer side of the mixing machine cylinder section, and the inner welding seam plays a main connecting role, so that a larger welding seam is used for connection; ensuring stable connection of adjacent components; the final aim is to ensure the joint strength of the whole mixing drum section.
Preferably, in the invention, when the mixer cylinder is assembled and welded, welding preheating is carried out before welding; the preheating energy reduces the cooling speed after welding, which is beneficial to the escape of the diffused hydrogen in the weld metal and avoids the generation of hydrogen-induced cracks; in addition, preheating can reduce welding stress; the uniform local preheating or the integral preheating can reduce the temperature difference (also called temperature gradient) between the welded workpieces in the welding area; therefore, on one hand, the welding stress is reduced, on the other hand, the welding stress rate is reduced, and the welding crack is favorably avoided; meanwhile, the preheating can reduce the restraint degree of a welding structure, the restraint degree of the angle joint is obviously reduced, and the crack occurrence rate is reduced along with the increase of the preheating temperature; the barrel of the mixer is welded by adopting an annular gas flame uniform heater for preheating, and a far infrared heater for heat preservation, so that the subsequent welding is prevented from being influenced by too fast temperature drop.
Preferably, the mixer barrel is placed on the supporting roller shaft 8, and the supporting roller shaft 8 is arranged to be equivalent to a base structure; meanwhile, the rotation of the mixing machine cylinder sections before and after welding is conveniently realized, and the measurement of waste heat and coaxiality is convenient; the structure of the supporting roll shaft 8 can be set according to the needs, and the simple structure is that the supporting roll shaft 8 comprises a base, roll shafts are arranged on two sides of the base, and the roll shafts are arranged in parallel to the shell sections or the rolling rings; as long as the welded parts can be stabilized; meanwhile, in the invention, the preheating temperature of the mixing machine barrel is required to be controlled to be 100-150 ℃; the temperature is selected in a reasonable range by using a calculation formula of preheating temperature according to the chemical compositions of steel and welding rods, the rigidity of a welding structure and the selection of a welding method, and has important influence on the reduction of welding stress; and a laser temperature measuring pen is adopted for detection during temperature measurement.
Preferably, in the invention, after the mixer cylinder is welded, the whole mixer cylinder is subjected to heat treatment by using a trolley type heat treatment furnace; the heat treatment mainly can improve the mechanical property of the material, improve the crack resistance of the welding line, eliminate the residual stress and improve the cutting processing of the metal; meanwhile, the weld joint after heat treatment is equivalent to dehydrogenation treatment, so that the weld joint is prevented from generating cracks.
Preferably, in the invention, after any adjacent parts of the C1 section cylindrical shell section 3, the C2 section cylindrical shell section 4, the E section cylindrical shell section 5, the A section rolling ring 1, the B section rolling ring 2 and the D section cylindrical shell section 7 are welded, the coaxiality of the welded mixing cylindrical shell section is measured; the measurement of axiality can guarantee that the whole axiality of the mixer shell ring after the welding meets the requirements, avoids the problem that the axiality is easy to pile up after the whole welding.
In addition, the coaxiality can be measured by using a dial indicator, and other parts can be matched for more accurate adjustment and measurement; the selection can be specifically carried out according to the needs.
It is clear that the specific implementation of the invention is not restricted to the above-described embodiments, but that various insubstantial modifications of the inventive process concept and technical solutions are within the scope of protection of the invention.
Claims (9)
1. A method for assembling mixer cylinder sections is characterized in that; the mixer cylinder comprises an A section rolling ring, a B section rolling ring and a transition section cylinder section; the section A rolling ring is connected with the section B rolling ring through a transition section cylindrical shell; one sides of the A-section rolling ring and the B-section rolling ring, which are far away from the transition section cylindrical shell, are connected with a D-section cylindrical shell;
the transition section shell ring comprises a C1 section shell ring, a C2 section shell ring and an E section shell ring;
the assembling method comprises the following steps:
step 1: preparation of a construction site: rechecking the surface, the appearance and the related size of the component to be assembled to ensure the integrity of equipment and facilities;
step 2: the A section is rolled and the B section is rolled and hung: assembling the section A rolling ring, the section B rolling ring and the transition section cylindrical section; the A section rolling ring and the B section rolling ring are respectively in gapless butt joint with the transition section cylindrical shell; respectively welding the section A rolling ring and the section B rolling ring with the transition section cylindrical shell;
the A section rolling ring is connected with a C1 section cylindrical shell section in the transition section cylindrical shell section to form a first part; the B section rolling ring is connected with a C2 section cylindrical section in the transition section cylindrical section to form a second part; after the C1 section of cylindrical shell section and the A section of rolling ring and the C2 section of cylindrical shell section and the B section of rolling ring are welded, the first component and the second component are respectively butted with the E section of cylindrical shell section, and after the butting is finished, the first component and the E section of cylindrical shell section and the second component are respectively welded with the E section of cylindrical shell section;
during actual welding, the welding requirements of the first part, the second part and the E-section shell ring are as follows:
when the first part is welded and then connected with the E-section cylindrical section, the first part is required to be connected with the E-section cylindrical section; when the second part is welded before the first part, the second part is required to be connected with the E section cylindrical section firstly;
and step 3: after the step 2 is finished, respectively butting the two D-section cylindrical sections on one sides of the A-section rolling ring and the B-section rolling ring, which are far away from the transition section cylindrical section; the section A rolling ring is welded with the section D cylindrical sections correspondingly connected, and the section B rolling ring is welded with the section D cylindrical sections correspondingly connected;
and 4, step 4: and (4) after the step 3 is finished, finishing the connection of the main structure of the mixing machine cylinder.
2. A method of assembling mixer drum segments according to claim 1, wherein; and the welding mode among any adjacent parts of the C1 section cylinder section, the C2 section cylinder section, the E section cylinder section, the A section rolling ring, the B section rolling ring and the D section cylinder section is submerged automatic arc welding.
3. The method of claim 2, wherein welding ring grooves are formed at the joint of adjacent parts of the C1 section shell section, the C2 section shell section, the E section shell section, the A section rolling ring, the B section rolling ring and the D section shell section.
4. The method of assembling mixer drum segments of claim 3, wherein said welding ring grooves comprise an outer welding ring groove and an inner welding ring groove; the depth and the height of the outer welding ring groove are both larger than those of the inner welding ring groove; the outer welding ring grooves are distributed on the inner wall of the mixing machine barrel.
5. The method of assembling mixer drum segments of claim 4 wherein said outer and inner weld ring slots have isosceles trapezoid vertical cross-sections.
6. The mixer drum segment assembling method according to claim 2, wherein, when the mixer drum is assembled and welded, welding preheating is performed before welding; the mixer cylinder is welded and preheated by adopting an annular gas flame uniform heater, and is insulated by adopting a far infrared heater.
7. The method of claim 6, wherein the mixer drum is placed on a support roller and the mixer drum preheat temperature is controlled between 100 ℃ and 150 ℃.
8. The method for assembling mixer cylinder sections according to claim 2, wherein the mixer cylinder is welded and then the whole mixer cylinder is heat-treated by using a car-type heat treatment furnace.
9. The method of claim 2, wherein the coaxiality of the welded mixer barrel is determined after welding any adjacent one of the C1, C2, E, A, B and D sections.
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| CN202110163516.8A CN112809236B (en) | 2021-02-05 | 2021-02-05 | Sectional assembling method for mixing machine barrel |
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| CN202110163516.8A CN112809236B (en) | 2021-02-05 | 2021-02-05 | Sectional assembling method for mixing machine barrel |
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| CN112809236B true CN112809236B (en) | 2022-07-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101967886A (en) * | 2010-11-16 | 2011-02-09 | 中国核工业第五建设有限公司 | Assembly and installation methods of steel containment vessel of nuclear power station |
| CN104384733A (en) * | 2014-10-23 | 2015-03-04 | 武汉船用机械有限责任公司 | Welding deformation control process used for manufacturing plug type hoisting platform pile leg |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE3103405A1 (en) * | 1981-02-02 | 1982-08-26 | Alfred Ing.(grad.) 4803 Steinhagen Czernick | Method and apparatus for producing the shell of large cylindrical containers |
| JPH0813418B2 (en) * | 1988-08-26 | 1996-02-14 | 川崎製鉄株式会社 | Automatic welding method for diaphragm attachment of column post |
| CN102908931B (en) * | 2011-08-04 | 2014-12-10 | 中国有色（沈阳）冶金机械有限公司 | Integration method of field manufacturing and installing of cylindrical mixer |
| CN105537791B (en) * | 2016-01-21 | 2017-08-29 | 中信重工机械股份有限公司 | A kind of method of Site Welding large-size horizontal converter barrel axiality |
| CN207312497U (en) * | 2016-12-19 | 2018-05-04 | 湖州展业物流机械设备有限公司 | A kind of segmented logistics roller |
| CN209536258U (en) * | 2019-01-08 | 2019-10-25 | 南城县南兴物流有限公司 | A kind of segmented logistics roller |
| CN111618397A (en) * | 2020-04-21 | 2020-09-04 | 上海二十冶建设有限公司 | Installation method of large-sized cylinder mixer cylinder |
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- 2021-02-05 CN CN202110163516.8A patent/CN112809236B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101967886A (en) * | 2010-11-16 | 2011-02-09 | 中国核工业第五建设有限公司 | Assembly and installation methods of steel containment vessel of nuclear power station |
| CN104384733A (en) * | 2014-10-23 | 2015-03-04 | 武汉船用机械有限责任公司 | Welding deformation control process used for manufacturing plug type hoisting platform pile leg |
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