CN109108434B - Improved raw sugar dryer roller assembling process and dryer roller - Google Patents
Improved raw sugar dryer roller assembling process and dryer roller Download PDFInfo
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- CN109108434B CN109108434B CN201811181266.5A CN201811181266A CN109108434B CN 109108434 B CN109108434 B CN 109108434B CN 201811181266 A CN201811181266 A CN 201811181266A CN 109108434 B CN109108434 B CN 109108434B
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 230000008569 process Effects 0.000 title claims abstract description 38
- 238000003466 welding Methods 0.000 claims abstract description 96
- 210000001503 joint Anatomy 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 239000002893 slag Substances 0.000 claims description 11
- 238000012856 packing Methods 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 4
- 239000010953 base metal Substances 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 7
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000001035 drying Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
Classifications
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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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/18—Submerged-arc welding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/06—Chambers, containers, or receptacles
- F26B25/14—Chambers, containers, receptacles of simple construction
- F26B25/16—Chambers, containers, receptacles of simple construction mainly closed, e.g. drum
Abstract
The invention discloses an improved original sugar dryer roller assembling process and a dryer roller, and belongs to the technical field of dryer roller assembling. The small ovality value of the cylinder body is more beneficial to improving the installation precision of the transmission device and the riding wheel device of the raw sugar dryer. The roller is horizontally placed on the roller bracket, the roller drives the roller to rotate, a welder performs welding operation on the welding lifting platform, welding positions are butt-joint flat welding, welding seam forming is attractive at the flat welding positions, and welding quality is well controlled; the welding is performed on the welding lifting platform, so that the risk coefficient of high-altitude operation can be reduced while the welding is convenient. The butt joint assembly process is adopted, the construction technology is mature, and the straightness of the cylinder can be better controlled.
Description
Technical Field
The invention relates to the technical field of dryer roller assembly, in particular to an improved raw sugar dryer roller assembly process and a dryer roller.
Background
Raw sugar dryers are an important process step in the drying and cooling of raw sugar and have a critical effect on the preservation of the sugar product and on whether caking and deterioration can occur during storage. The existing cylinder and backing ring assembly process has the following construction processes with great difficulty:
(1) The diameter of the cylinder is large, the thickness of the plate is thin, and the thermal deformation in the process of the cylindrical shell section rolling assembly welding is added, so that the difference between the maximum inner diameter and the minimum inner diameter on the same section is larger, and the maximum value reaches 16.8mm. In order to control the ovality of the cylinder section, only one procedure, namely, a temporary 'rice' -shaped support is arranged in the cylinder section to control the deformation when the cylinder section is assembled and welded, which is labor-and time-consuming. (2) The total length of the cylinder is 9000mm, 4 cylinder sections are needed to be subjected to butt welding, the welding lines are large in number and length, and the welding deformation is large. The consequence of large welding deformation is that the sleeving procedure of the backing ring and the subsequent installation of the transmission device and the riding wheel device are affected, and the construction progress is delayed. (3) The backing ring is sleeved on the cylinder in a lap welding mode, perpendicularity of the backing ring and the cylinder is difficult to control, and the backing ring displacement possibly affects operation safety of equipment. (4) The backing ring sleeving process is adopted, so that high-altitude operation amount is high, and safety construction is not facilitated.
Disclosure of Invention
The invention aims to provide an improved raw sugar dryer roller assembly process and a dryer roller, and solves the technical problems mentioned in the background.
An improved raw sugar dryer drum assembly process, the assembly process comprising the steps of:
step 1: manufacturing a backing ring and manufacturing a cylindrical shell section;
step 2: the packing ring is assembled with the cylinder, the error amount of the welding interface at the inner side is smaller than or equal to 2.8mm-3.2mm, the difference between the maximum inner diameter and the minimum inner diameter on the same section of the cylinder is smaller than or equal to 25mm-29mm, and the packing ring is assembled with the cylinder in a flip-chip manner;
step 3: the cylinder and the backing ring are assembled and fixedly welded in a flip-chip manner, then are horizontally placed on the roller bracket for welding, and are lifted and leveled by weldingThe table welds the girth weld by CO 2 Backing by gas shield welding, and filling and capping by submerged arc welding;
step 4: and cleaning welding spatter, checking appearance and detecting size after welding.
Further, the size of the backing ring manufactured in the step 1 is DN2750x25x600mm, and the number of the backing rings is 3.
Further, the cylinder section manufacturing in the step 1 includes 2 cylinders a, 1 cylinder B and 1 cylinder C, and the cylinder a has a size: DN2750x12x1700mm, cylinder B size: DN2750x12x1200mm, cylinder C size: DN2750x12x2600mm.
Further, the specific process of manufacturing the cylindrical shell section in the step 1 is as follows:
scribing the blanking size, reserving 3mm machining allowance, wherein the blanking size of a cylinder A is 8680x1703x12mm, the blanking size of a cylinder B is 8680x1203x12mm, and the blanking size of a cylinder C is 8680x1703x12mm;
groove processing, wherein the radian of the groove is 22.5-27.5 degrees;
and (3) rolling, welding, namely backing by adopting CO2 gas shielded welding, and filling and covering by submerged arc welding.
Further, the welding process is as follows:
after checking that the surface of the groove is free from cracks, layering and slag inclusion, removing oxides, oil and water on the surface within the range of 20mm on both sides of the groove;
the welding positioning weld joint is 30mm long, the interval is 300mm, the welding current is 10-15% higher than the normal current (welding standard current), the welding material mark is the same as the weld joint, and the slag is removed cleanly after welding;
cleaning slag after each layer (channel) welding, and then welding the next layer (channel), and checking that a defect-free square can be welded after back surface back chipping;
after checking that the weld joint and the heat affected zone have no cracks, air holes, slag inclusion and arc pits, the depth of the seam is less than 0.5mm, the continuous length of the seam is less than 100mm, the total length of the seam is less than 10% of the length of the seam, and the weld joint is smoothly transited to the base metal.
An improved raw sugar dryer roller, which is characterized in that: the device comprises a first cylinder A, a cylinder B, a cylinder C, a second cylinder A, a baffle, a limiting ring, a hood, a front tug device, a rotating device, a rear tug device and a tail hood;
the baffle sets up the one end at first drum A, and first drum A's the other end is connected with drum B, and drum B is connected with second drum A through drum C, the hood sets up the end at first drum A, the tail hood sets up the end at second drum A, hood and first drum A junction, tail hood and second drum A's junction all set up the spacing ring, preceding tug device sets up the outside at first drum A and drum B junction, rotating device sets up the outside at drum B and drum C junction, back tug device sets up the outside at drum C and second drum A junction.
Further, the rotating device comprises a gear cover and a backing ring, wherein the backing ring is arranged on the outer side of the connecting part of the cylinder B and the cylinder C, and the gear cover is fixed on the outer side of the backing ring.
Further, backing rings are arranged on the inner sides of the front tug device and the rear tug device respectively, and the front tug device and the rear tug device are fixedly connected with the backing rings.
Further, the device also comprises a power device, wherein the power device is arranged on the outer side of the rotating device, and the power device is in meshing connection with the rotating device through a gear.
Further, the height of the backing ring is 600mm, the length of the first cylinder A is 1700mm, the length of the cylinder B is 1200mm, the length of the cylinder C is 2600mm, and the length of the second cylinder A is 1700mm.
The invention adopts the technical proposal and has the following technical effects:
(1) According to the invention, the backing ring is in butt joint and assembly welding with the cylinder, the ovality of the cylinder is 8-9 mm, and compared with the maximum value of ovality of the sleeving process reaching 16.8mm, the ovality difference of the cylinder body is almost doubled by adopting the butt joint process. The small ovality value of the cylinder body is more beneficial to improving the installation precision of the transmission device and the riding wheel device of the raw sugar dryer.
(2) The roller is horizontally placed on the roller bracket, the roller drives the roller to rotate, a welder performs welding operation on the welding lifting platform, welding positions are butt-joint flat welding, welding seam forming is attractive at the flat welding positions, and welding quality is well controlled; the welding is performed on the welding lifting platform, so that the risk coefficient of high-altitude operation can be reduced while the welding is convenient.
(3) The butt joint assembly process is adopted, the construction technology is mature, and the straightness of the cylinder can be better controlled. The straightness measurement value of the barrel body of the raw sugar dryer is 3-4 mm, and the straightness is high so that the raw sugar in the raw sugar dryer is fully subjected to heat exchange with the air flow in the barrel, and the moisture contained in the raw sugar is gradually dried, thereby achieving the purpose of drying.
Drawings
Fig. 1 is a schematic view of the drum structure of the dryer of the present invention.
Fig. 2 is a schematic view of a cylindrical joint groove structure according to the present invention.
Fig. 3 is a grommet-cylinder joint groove of the present invention.
Reference numerals: 1-first cylinder A, 2-cylinder B, 3-cylinder C, 4-second cylinder A, 5-baffle, 6-limit ring, 7-hood, 8-drum, 9-front tug device, 10-rotation device, 11-gear hood, 12-backing ring, 13-rear tug device, 14-tail hood.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below by referring to the accompanying drawings and by illustrating preferred embodiments. It should be noted, however, that many of the details set forth in the description are merely provided to provide a thorough understanding of one or more aspects of the invention, and that these aspects of the invention may be practiced without these specific details.
Raw sugar dryers are an important process step in the drying and cooling of raw sugar and have a critical effect on the preservation of the sugar product and on whether caking and deterioration can occur during storage. In the process, a DN2750 raw sugar dryer is taken as an example, and a plurality of difficulties and improvements in the processing and assembling processes of equipment are listed.
The DN2750 raw sugar dryer roller assembly process performs comparison analysis from the aspects of material planning, welding line layout, assembly time consumption and the like, and on the premise of ensuring the product quality, the packing ring is sleeved on the cylinder to be connected with the cylinder in a gap welding way, so that the packing ring is directly connected with the cylinder in a butt welding way, the manufacturing process quality of the roller is improved, the assembly time of the roller is shortened, the working efficiency is increased, and the roller has higher economic benefit.
In order to reduce the manufacturing difficulty of the Oriental project raw sugar dryer in 2017, improve the manufacturing quality and economic benefit, and improve the roller assembly process of the raw sugar dryer. Project manager organizes project department and design room related personnel in 2017 8 12 days to hold a seminar about 'improving original sugar dryer roller assembly process', and all-round investigation, statistics and analysis are carried out from factors such as backing ring and cylinder assembly mode, material consumption, labor cost, assembly time consumption and the like, finally, the process of assembling the roller is determined, the process of sleeving the backing ring and the cylinder is changed into the process of butt joint of the backing ring and the cylinder, namely the thickness of the backing ring is changed, the inner diameter of the backing ring is the same as the inner diameter of the cylinder, and the backing ring is in butt welding connection with the cylinder.
An improved raw sugar dryer drum assembly process, the assembly process comprising the steps of:
step 1: manufacturing a backing ring and manufacturing a cylindrical shell section;
step 2: the packing ring is assembled with the cylinder, the error amount of the welding interface at the inner side is smaller than or equal to 2.8mm-3.2mm, the difference between the maximum inner diameter and the minimum inner diameter on the same section of the cylinder is smaller than or equal to 25mm-29mm, and the packing ring is assembled with the cylinder in a flip-chip manner;
step 3: the cylinder and the backing ring are assembled and fixedly welded in a flip-chip manner, then are horizontally placed on the roller bracket for welding, the circumferential weld is welded by utilizing the welding lifting platform, and the welding adopts CO 2 Backing by gas shield welding, and filling and capping by submerged arc welding;
step 4: and cleaning welding spatter, checking appearance and detecting size after welding.
The size of the backing ring manufactured in the step 1 is DN2750x25x600mm, and the number of the backing rings is 3.
The cylinder section manufacturing in the step 1 comprises 2 cylinders a, 1 cylinder B and 1 cylinder C, and the cylinder a has the following dimensions: DN2750x12x1700mm, cylinder B size: DN2750x12x1200mm, cylinder C size: DN2750x12x2600mm.
The specific process of manufacturing the cylinder section in the step 1 is as follows:
scribing the blanking size, reserving 3mm machining allowance, wherein the blanking size of a cylinder A is 8680x1703x12mm, the blanking size of a cylinder B is 8680x1203x12mm, and the blanking size of a cylinder C is 8680x1703x12mm;
groove processing, wherein the radian of the groove is 22.5-27.5 degrees, as shown in figure 2;
and (3) rolling, welding, namely backing by adopting CO2 gas shielded welding, and filling and covering by submerged arc welding.
The welding process comprises the following steps:
after checking that the surface of the groove is free from cracks, layering and slag inclusion, removing oxides, oil and water on the surface within the range of 20mm on both sides of the groove;
the welding positioning weld joint is 30mm long, the interval is 300mm, the welding current is 10-15% higher than the normal current (welding standard current), the welding material mark is the same as the weld joint, and the slag is removed cleanly after welding;
cleaning slag after each layer (channel) welding, and then welding the next layer (channel), and checking that a defect-free square can be welded after back surface back chipping;
after checking that the weld joint and the heat affected zone have no cracks, air holes, slag inclusion and arc pits, the depth of the seam is less than 0.5mm, the continuous length of the seam is less than 100mm, the total length of the seam is less than 10% of the length of the seam, and the weld joint is smoothly transited to the base metal.
The raw sugar dryer mainly comprises a frame, a hood, a tail hood, a roller, a front riding wheel device, a transmission device, a rear riding wheel device, a gear hood and the like. Because the dryer is obliquely placed, on one hand, the raw sugar flows to the lower end under the action of gravity and rotation, and on the other hand, the raw sugar is repeatedly shoveled by the shoveling plate and brought to the upper end to be continuously scattered, so that the raw sugar forms a uniform curtain in the cylinder and fully exchanges heat with the air flow in the cylinder. As the raw sugar is repeatedly scattered, the moisture contained in the raw sugar is gradually dried, thereby achieving the purpose of drying and being beneficial to storage.
The raw sugar dryers manufactured in 2015 and 2016 were 3 sugar factories of Thailand Wide Wu Li and Thailand Lei Wu Li respectively. The 3 raw sugar dryer roller backing rings are assembled with the cylinder by adopting a sleeving process, namely the backing rings are sleeved on the cylinder, and the backing rings are overlapped with the cylinder. The outer diameter phi of the cylinder is 3000mm, and the thickness delta of the cylinder is=14mm; backing ring inner diameter Φ3004mm plate thickness δ=22 mm.
The Oriental project raw sugar dryer was manufactured beginning in 2017, 9, and manufactured according to the process of directly butt-jointing and assembling the backing ring and the cylinder. Because of the tight construction period of the project, the backing ring, the front riding wheel device, the transmission device and the rear riding wheel device on the backing ring are all manufactured by external cooperation units.
As shown in fig. 1, a drum structure diagram of an improved raw sugar dryer according to the invention comprises a first drum A1, a drum B2, a drum C3, a second drum A4, a baffle 5, a limiting ring 6, a hood 7, a front tug device 9, a rotating device 10, a rear tug device 13 and a tail hood 14;
the baffle 5 is arranged at one end of the first cylinder A1, the other end of the first cylinder A1 is connected with the cylinder B2, the cylinder B2 is connected with the second cylinder A4 through the cylinder C3, the hood 7 is arranged at the tail end of the first cylinder A1, the tail hood 14 is arranged at the tail end of the second cylinder A4, the joint of the hood 7 and the first cylinder A1, the joints of the tail hood 14 and the second cylinder A4 are all provided with limiting rings 6, the front tug device 9 is arranged outside the joint of the first cylinder A1 and the cylinder B2, the rotating device 10 is arranged outside the joint of the cylinder B2 and the cylinder C3, and the rear tug device 13 is arranged outside the joint of the cylinder C3 and the second cylinder A4.
The rotating device 10 comprises a gear cover 11 and a backing ring 12, wherein the backing ring 12 is arranged outside the connection part of the cylinder B2 and the cylinder C3
The gear cover 11 is fixed to the outer side of the backing ring 12.
The inner sides of the front tug device 9 and the rear tug device 13 are respectively provided with a backing ring 12, and the front tug device 9 and the rear tug device 13 are respectively fixedly connected with the backing rings 12.
The scheme further comprises a power device, wherein the power device is arranged on the outer side of the rotating device 10 and is in meshed connection with the rotating device 10 through a gear.
The height of the backing ring 12 is 600mm, the length of the first cylinder A1 is 1700mm, the length of the cylinder B2 is 1200mm, the length of the cylinder C3 is 2600mm, and the length of the second cylinder A4 is 1700mm.
Barrel assembly inspection record table
The "barrel assembly acceptance record table" can be as follows: the backing ring is in butt joint and assembly welding with the cylinder, the ovality of the cylinder is 8-9 mm, and compared with the maximum ovality of the sleeving process reaching 16.8mm, the ovality difference of the cylinder body is almost doubled by adopting the butt joint process. The small ovality value of the cylinder body is more beneficial to improving the installation precision of the transmission device and the riding wheel device of the raw sugar dryer. The roller is horizontally placed on the roller bracket, the roller drives the roller to rotate, a welder performs welding operation on the welding lifting platform, welding positions are butt-joint flat welding, welding seam forming is attractive at the flat welding positions, and welding quality is well controlled; the welding is performed on the welding lifting platform, so that the risk coefficient of high-altitude operation can be reduced while the welding is convenient. The butt joint assembly process is adopted, the construction technology is mature, and the straightness of the cylinder can be better controlled. The straightness measurement value of the barrel body of the raw sugar dryer is 3-4 mm, and the straightness is high so that the raw sugar in the raw sugar dryer is fully subjected to heat exchange with the air flow in the barrel, and the moisture contained in the raw sugar is gradually dried, thereby achieving the purpose of drying.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (1)
1. An improved raw sugar dryer roller assembly process is characterized in that: the raw sugar dryer roller comprises a first cylinder A (1), a cylinder B (2), a cylinder C (3), a second cylinder A (4), a baffle plate (5), a limiting ring (6), a hood (7), a front tug device (9), a rotating device (10), a rear tug device (13) and a tail hood (14);
the baffle (5) is arranged at one end of the first cylinder A (1), the other end of the first cylinder A (1) is connected with the cylinder B (2), the cylinder B (2) is connected with the second cylinder A (4) through the cylinder C (3), the hood (7) is arranged at the tail end of the first cylinder A (1), the tail hood (14) is arranged at the tail end of the second cylinder A (4), the hood (7) is connected with the first cylinder A (1), limit rings (6) are arranged at the connection parts of the tail hood (14) and the second cylinder A (4), the front tug device (9) is arranged outside the connection parts of the first cylinder A (1) and the cylinder B (2), the rotating device (10) is arranged outside the connection parts of the cylinder B (2) and the cylinder C (3), and the rear tug device (13) is arranged outside the connection parts of the cylinder C (3) and the second cylinder A (4);
the assembly process comprises the following steps:
step 1: manufacturing a backing ring and manufacturing a cylindrical shell section;
step 2: the packing ring is assembled with the cylinder, the error amount of the welding interface at the inner side is smaller than or equal to 2.8mm-3.2mm, the difference between the maximum inner diameter and the minimum inner diameter on the same section of the cylinder is smaller than or equal to 25mm-29mm, and the packing ring is assembled with the cylinder in a flip-chip manner;
step 3: the cylinder and the backing ring are assembled and fixedly welded in a flip-chip manner, then are horizontally placed on the roller bracket for welding, the circumferential weld is welded by utilizing the welding lifting platform, and the welding adopts CO 2 Backing by gas shield welding, and filling and capping by submerged arc welding;
step 4: cleaning welding spatter, checking appearance and detecting size after welding;
the sizes of the backing rings manufactured in the step 1 are DN2750x25x600mm, and the number of the backing rings is 3;
the cylinder section manufacturing in the step 1 comprises 2 cylinders a, 1 cylinder B and 1 cylinder C, and the cylinder a has the following dimensions: DN2750x12x1700mm, cylinder B size: DN2750x12x1200mm, cylinder C size: DN2750x12x2600mm;
the specific process of manufacturing the cylinder section in the step 1 is as follows:
scribing the blanking size, reserving 3mm machining allowance, wherein the blanking size of a cylinder A is 8680x1703x12mm, the blanking size of a cylinder B is 8680x1203x12mm, and the blanking size of a cylinder C is 8680x2603x12mm;
groove processing, wherein the radian of the groove is 22.5-27.5 degrees;
rolling, welding, namely backing by adopting CO2 gas shielded welding, and filling and covering by submerged arc welding;
the welding process comprises the following steps:
after checking that the surface of the groove is free from cracks, layering and slag inclusion, removing oxides, oil and water on the surface within the range of 20mm on both sides of the groove;
the welded positioning weld is 30mm long, the interval is 300mm, the welding current is 10-15% higher than the welding standard current, the welding material mark is the same as the weld requirement, and the slag is removed cleanly after welding;
each layer or each layer of welding is cleaned, then the next layer or next layer is welded, and the defect-free side is inspected to be weldable after back chipping;
after checking that the weld joint and the heat affected zone have no cracks, air holes, slag inclusion and arc pits, the depth of the seam undercut is less than 0.5mm, the continuous length of the undercut is less than 100mm, the total length of the undercut on two sides is less than 10% of the length of the weld joint, and the weld joint is smoothly transited to a base metal;
the rotating device (10) comprises a gear cover (11) and a backing ring (12), wherein the backing ring (12) is arranged between the cylinder B (2) and the cylinder C (3) and is in butt joint assembly welding with the cylinder B (2) and the cylinder C (3), and the gear cover (11) is fixed on the outer side of the backing ring (12);
the inner sides of the front tug device (9) and the rear tug device (13) are respectively provided with a backing ring (12), and the front tug device (9) and the rear tug device (13) are respectively fixedly connected with the backing rings (12);
the roller of the raw sugar dryer further comprises a power device, wherein the power device is arranged on the outer side of the rotating device (10), and is in meshing connection with the rotating device (10) through a gear;
the height of the backing ring (12) is 600mm, the length of the first cylinder A (1) is 1700mm, the length of the cylinder B (2) is 1200mm, the length of the cylinder C (3) is 2600mm, and the length of the second cylinder A (4) is 1700mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811181266.5A CN109108434B (en) | 2018-10-11 | 2018-10-11 | Improved raw sugar dryer roller assembling process and dryer roller |
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| CN201811181266.5A CN109108434B (en) | 2018-10-11 | 2018-10-11 | Improved raw sugar dryer roller assembling process and dryer roller |
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| CN109108434B true CN109108434B (en) | 2024-04-16 |
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| CN112575625A (en) * | 2019-09-27 | 2021-03-30 | 比亚迪股份有限公司 | Butt welding plate group, turnout beam and processing method of butt welding plate group |
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