CN113680826B - Vertical roll box overhauling method of vertical roll mill - Google Patents
Vertical roll box overhauling method of vertical roll mill Download PDFInfo
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- CN113680826B CN113680826B CN202110820179.5A CN202110820179A CN113680826B CN 113680826 B CN113680826 B CN 113680826B CN 202110820179 A CN202110820179 A CN 202110820179A CN 113680826 B CN113680826 B CN 113680826B
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- box body
- intermediate shaft
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- bearing
- gear sleeve
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
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- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
Abstract
A method for overhauling a vertical roller box of a vertical roller mill belongs to the technical field of vertical roller mill overhauling methods and is used for rapidly assembling a shaft of the vertical roller box. The technical proposal is as follows: measuring the thickness of a bearing at the bottom end of a first intermediate shaft box body as a, then annularly processing teeth with the width larger than a on the lower end direction of a second intermediate shaft gear sleeve box body, lifting the first intermediate shafts with all the inner sleeves of the bearings at the two sides when in assembly, and loading the first intermediate shafts into a lower bearing position aiming at the notch position of the second intermediate shaft gear sleeve, thereby realizing the bearing installation of the first intermediate shaft; and cutting a square hole at the position right in front of the second intermediate shaft gear sleeve of the box body, and installing a flange and a blind cover on the square hole. The invention is the first creation of the vertical roller box maintenance method of the vertical roller mill, breaks the traditional maintenance mode, is inconceivable in the conventional assembly method, thoroughly solves the problem that the vertical roller box body must be overturned for many times in the conventional assembly method, greatly shortens the whole dismantling and inspection period, has simple and reliable operation process and greatly improves the safety.
Description
Technical Field
The invention relates to a method for overhauling a vertical roll box of a vertical roll mill, belonging to the technical field of overhauling methods of vertical roll mills.
Background
The vertical roll box of the vertical roll mill is mill transmission equipment for controlling the width of a plate on a rolling line, the equipment uses a long universal joint shaft to provide power, and the born rolling force is relatively large, so that the equipment has a relatively bad use environment. Meanwhile, in the use process, the components in the vertical roller box are worn greatly, the damage frequency is high and the maintenance is more frequent due to the reasons of difficult box body sealing of the vertical roller box, poor equipment lubrication and the like.
The overhauling process of the vertical roller box comprises the steps of firstly disassembling all parts in the box body, replacing new spare parts according to the abrasion condition, and then assembling. At present, in the assembly process, because the first intermediate shaft and the second intermediate shaft in the box body are compact in position, shielding exists in the assembly relation between the first intermediate shaft and the second intermediate shaft, the lower part of the first intermediate shaft cannot be provided with a bearing for installation, the box body can only be turned over again after the optical axis is installed, the box body of the vertical roller box can be assembled only by turning over the box body of the vertical roller box for multiple times in the disassembly and assembly, and meanwhile, the box body of the vertical roller box is of a fully-closed structure, so that observation and maintenance are not facilitated. Therefore, according to the existing maintenance method, the assembly time is greatly prolonged, the personnel and labor intensity are increased, and the box body of the vertical roller box is large in size and 10 tons in total weight, and the bottom of the box body is provided with an arc, so that the lifting is difficult, and certain potential safety hazards exist.
In summary, the maintenance of the vertical roll box of the vertical roll mill is an important work for ensuring the normal operation of the vertical roll mill, the existing maintenance method cannot meet the production requirement, the difficult problem of restricting the maintenance of the vertical roll box is caused, and the new maintenance method is urgently needed to be adopted for maintaining the vertical roll box so as to ensure the normal operation of production.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for overhauling a vertical roller box of a vertical roller mill, which can conveniently hoist a second shaft, simultaneously can enable a first shaft to be provided with a bearing, reduce the turnover times of a box body, simplify the assembly procedure, ensure the installation quality and efficiency and improve the safety.
The technical scheme for solving the technical problems is as follows:
a method for overhauling a vertical roller box of a vertical roller mill comprises the following steps:
firstly, removing parts in a box body;
step two, cleaning the inside of the box body, measuring the relative position of the second intermediate shaft outer gear sleeve in the box body and the box body shell, and measuring the thickness of the first intermediate shaft lower bearing;
thirdly, calculating the number and the length of gear teeth of the outer gear sleeve of the second intermediate shaft according to the measurement result, wherein the thickness of the lower bearing of the first intermediate shaft at the bottom of the measuring box body is a, and the lower end of the box body of the outer gear sleeve of the second intermediate shaft is required to be circularly machined with teeth with the width larger than a, or 3 teeth are machined at the position, opposite to the lower bearing of the first intermediate shaft, of the outer gear sleeve of the second intermediate shaft, the machining length is larger than the length of a, and the width of the lower bearing of the first intermediate shaft entering the bearing position is reserved;
fourthly, cutting the shell of the box body by using a cutting tool, cutting 200mm square holes at the position right in front of the second intermediate shaft outer tooth sleeve of the box body, welding a flange with a corresponding size on the square holes after the square holes are drilled, uniformly distributing screw holes on the flange, making a blind cover corresponding to the flange, and filling anti-leakage rubber between the flange and the blind cover, wherein the blind cover and the flange are tightly screwed and sealed by bolts;
fifthly, placing the second intermediate shaft outer gear sleeve into the box body, then lifting the cut square hole to a proper height and position in the box body, inserting a second intermediate shaft from the outer side of the bottom of the box body to support the second intermediate shaft outer gear sleeve, assembling an end cover, rotating a notch of the second intermediate shaft outer gear sleeve after cutting teeth to a position opposite to the first intermediate shaft, simultaneously placing an outer sleeve of a lower bearing of the first intermediate shaft into a bearing position at the lower part of the box body, and sealing and closing an end cover of the lower box body at the bottom of the box body and ensuring close contact with the outer sleeve of the lower bearing of the first intermediate shaft;
step six, the hollow shaft with the assembled bearing is crashed into the upper end of the box body from the large end, and the lower end cover is sealed, so that all the end covers at the lower part of the box body are assembled;
a seventh step of lifting the first intermediate shaft with all the inner sleeves of the bearings at the two sides, aligning the notch position of the outer gear sleeve of the second intermediate shaft, and loading the bearing position of the lower bearing of the first intermediate shaft, wherein the shaft teeth of the first intermediate shaft are meshed with the outer gear sleeve of the second intermediate shaft;
eighth step, hoisting the fast shaft, and placing the fast shaft into a bearing position;
and ninth, the box body cover is covered to screw the box body bolt, the shaft end covers are adjusted and assembled, and the bearing gaps at the upper part are adjusted. Finally, the fast shaft coupling is assembled.
In the first step, the vertical roller box to be disassembled and inspected is vertically placed into a supporting frame, a coupler of a box fast shaft is taken down, and a box upper cover bolt is removed; then sequentially lifting out the upper end cover of the box body, the fast shaft and the first intermediate shaft, and simultaneously removing the oil pipe and the upper end cover of the hollow shaft; then the box body is lifted out of the supporting frame and laid down, and all end covers at the bottom of the box body are removed; then the hollow shaft is bumped from the small end to the large end by using a larger columnar object, and the bearing is not required to be bumped; and finally, removing the oil pipe on the shaft top of the second intermediate shaft, withdrawing the second intermediate shaft from one side of the bottom of the box body, and taking out the outer gear sleeve of the second intermediate shaft.
According to the method for overhauling the vertical roller box of the vertical roller mill, in the fourth step, the welding height of the flange on the square hole is determined by the fact that the height of the bolt cap does not protrude out of the machining surface for fixing the box body side after the blind cover is assembled, so that the influence on online use and replacement of the box body is avoided.
The beneficial effects of the invention are as follows:
according to the invention, the thickness of the bearing at the bottom end of the first shaft box body is measured as a, then, teeth with the width larger than a are annularly machined at the lower end direction of the second shaft gear sleeve box body, or 3 teeth are machined at the position, opposite to the lower bearing of the first shaft, of the second shaft gear sleeve, the machining length is larger than the length of a, when the first shaft is assembled, all the first shafts which are assembled on the inner sleeves of the bearings at the two sides can be lifted, the lower bearing positions are assembled at the notch positions of the second shaft gear sleeve, so that the bearing mounting of the first shaft is realized, and the method for mounting the bearing by turning the box body again after only the optical axis is assembled is avoided. According to the invention, the square hole is cut at the position right in front of the second shaft gear sleeve, the flange and the blind cover are arranged on the square hole, the second shaft can be conveniently hoisted through the square hole, and meanwhile, the condition of the shaft bearing, the gear and other parts inside the box body can be conveniently checked.
The method is a first creation of a vertical roller box maintenance method of the vertical roller mill, breaks through the traditional maintenance mode, adopts a method of cutting the outer gear sleeve of the second intermediate shaft gear to realize the assembly of the first intermediate shaft with the bearing, is inconceivable in the conventional assembly method, thoroughly solves the problem that the box body of the vertical roller box must be overturned for many times in the conventional assembly method, is quite visual and convenient to overhaul and maintain and spot inspection, greatly shortens the whole dismantling and inspection period, has simple and reliable operation process, and greatly improves the safety.
Drawings
FIG. 1 is a schematic view of a construction of a vertical roll tank;
FIG. 2 is a schematic diagram of the open position of a vertical roll box;
fig. 3 is a schematic diagram of the result of the second sleeve gear.
The figures are labeled as follows: the quick shaft 1, a first intermediate shaft 2, an upper end cover 3 of the box body, a working roller 4, a hollow shaft 5, a second intermediate shaft 6, a second intermediate shaft outer gear sleeve 7, a first intermediate shaft lower bearing 8, a lower end cover 9 of the box body, square holes 10 and a gear part cut-out part 11 of the second intermediate shaft gear sleeve.
Detailed Description
The technical scheme of the invention is as follows: the box body side Fang Kaikong of the vertical roller box is sealed by welding a flange and installing a blind cover, and the position of the opening is based on the principle that the condition of a bearing at the lower part of the first intermediate shaft can be seen and the second intermediate shaft tooth sleeve is convenient to hoist; simultaneously, all teeth on a tooth sleeve with a certain length (such as 70 mm) are annularly cut off, or 3 teeth (to the root of the tooth) with a certain length (such as 70 mm) are processed at the lower part of the second shaft gear sleeve, and when the first shaft bearing is assembled, the first shaft bearing with the bearing rolling body part assembled is conveniently assembled in the bearing position with the bearing outer ring assembled, so that the turnover frequency of the box body during assembly is reduced.
The specific steps of the technical scheme of the invention are as follows:
(1) The vertical roller box to be disassembled and inspected is vertically placed in a special supporting frame, the coupler of the box body fast shaft 1 is taken down, and the box body upper cover bolt is removed.
(2) And sequentially lifting out the upper end cover 3 of the box body, the fast shaft 1 and the first intermediate shaft 2, and simultaneously removing the oil pipe and the upper end cover of the hollow shaft 5.
(3) And lifting the box body out of the supporting frame and placing the box body upside down, and completely removing all end covers at the bottom of the box body.
(4) The hollow shaft 5 is bumped from the small end to the large end by a large columnar object, the bearing is not bumped, the oil pipe on the shaft top of the second intermediate shaft 6 is removed, then the second intermediate shaft 6 is withdrawn from one side of the bottom of the box body, and the second intermediate shaft external gear sleeve 7 is taken out.
(5) Cleaning the inside of the box body, and measuring the relative position of the second intermediate shaft external gear sleeve 7 inside the box body and the box body shell; the thickness of the first shaft lower bearing 8 is measured, the number and the length of gear teeth of the second shaft outer gear sleeve 7 are measured and calculated, and the thickness of the first shaft lower bearing 8 at the bottom end of the first shaft 2 is measured to be 60mm, so that the gear with the width of 70mm is annularly processed at the lower end direction of the second shaft outer gear sleeve 7, the width of the first shaft 2 with the bearing entering the bearing position is left, or the 3 gear processing lengths of 70mm are processed at the position, opposite to the first shaft lower bearing 8, of the second shaft outer gear sleeve 7, and the lower part of the first shaft 2 can be provided with the bearing to be assembled, so that the turnover times of the box during assembly are reduced.
(6) Cutting the box body shell by using a cutting tool, cutting 200mm square holes 10 at the lower part of the right front direction of the second intermediate shaft external gear sleeve 7, facilitating the assembly of the second intermediate shaft 6 and the inspection of the lower bearings of the two intermediate shafts, welding a flange with a corresponding size on the square holes 10 after opening the holes, uniformly distributing M16 threaded holes on the flange, opening 18mm bolt holes at the position corresponding to the flange by using a blind cover, and sealing the part by using M16 bolts.
The part is only opened during on-line inspection or box body disassembly inspection, and the square hole 10 can be used for conveniently inspecting the integrity of the shaft bearings, teeth and other parts in the box body, and simultaneously, two shafts can be conveniently assembled. It should be noted that the flange welding height should be based on the fact that the height of the bolt cap does not protrude out of the processing surface for fixing the box body side after the blind cover is assembled, otherwise, the online replacement of the box body is affected.
(7) In the assembly process, the second shaft outer gear sleeve 7 is firstly placed into the box body and then lifted to a proper height and position in the box body through the square hole 10. Inserting a second intermediate shaft 6 from the outer side of the bottom of the box body to support a second intermediate shaft outer gear sleeve 7, wherein a gap between the second intermediate shaft 6 and the second intermediate shaft outer gear sleeve 7 is 0.3-0.5mm, and assembling an end cover; then turning the notch of the second intermediate shaft outer gear sleeve 7 after cutting the teeth to a position opposite to the first intermediate shaft 2; meanwhile, the first shaft lower bearing 8 is sleeved outside the bearing position at the lower part of the box body, and then the lower end cover 9 of the box body at the bottom of the box body is sealed and closed, and the tight contact with the bearing sleeve is ensured, so that the final gap adjustment is convenient.
(8) The hollow shaft 5 with the assembled bearing is bumped into from the large end, i.e. the upper part of the tank and the lower end cap is sealed, at which point all the end caps in the lower part of the tank are assembled.
(9) The box body is erected and hung back to a supporting frame special for maintenance.
(10) The first intermediate shaft 2 with all the bearing inner sleeves at the two sides is lifted, the lower bearing position is arranged in alignment with the notch position of the second intermediate shaft outer gear sleeve 7, and the shaft teeth of the first intermediate shaft 2 are meshed with the second intermediate shaft outer gear sleeve 7.
(11) And hoisting the fast shaft 1 and placing the fast shaft into a bearing position.
(12) And (3) screwing the box body bolts on the box body cover, adjusting and assembling the shaft end covers, adjusting the bearing gaps at the upper part, and finally, installing the fast shaft coupler to finish the assembly.
Claims (3)
1. A method for overhauling a vertical roll box of a vertical roll mill is characterized by comprising the following steps of: the method comprises the following steps:
firstly, removing parts in a box body;
step two, cleaning the inside of the box body, measuring the relative position of a second intermediate shaft external gear sleeve (7) and the box body shell in the box body, and measuring the thickness of a first intermediate shaft lower bearing (8);
thirdly, calculating the number and the length of gear teeth of the second intermediate shaft external gear sleeve (7) to be cut according to a measurement result, wherein the thickness of a first intermediate shaft lower bearing (8) at the bottom of a measured box body is a, and annularly processing teeth with the width larger than a on the lower end direction of the box body of the second intermediate shaft external gear sleeve (7), or processing 3 teeth on the position, opposite to the first intermediate shaft lower bearing (8), of the second intermediate shaft external gear sleeve (7), wherein the processing length is larger than a, and the width of the lower part of the first intermediate shaft (2) with the bearing entering a bearing position is left;
fourthly, cutting the shell of the box body by using a cutting tool, cutting 200mm square holes (10) at the lower part in the front direction of the second intermediate shaft external gear sleeve (7), welding a flange with a corresponding size on the square holes (10) after the square holes are drilled, uniformly distributing screw holes on the flange, making a blind cover corresponding to the flange, and filling anti-leakage rubber between the flange and the blind cover, wherein the blind cover and the flange are tightly screwed and sealed by bolts;
fifthly, after the second intermediate shaft outer gear sleeve (7) is placed into the box body, the cut square hole (10) is lifted to a proper height and position in the box body, the second intermediate shaft (6) is inserted from the outer side of the bottom of the box body to support the second intermediate shaft outer gear sleeve (7), an end cover is assembled, then a notch of the second intermediate shaft outer gear sleeve (7) after cutting teeth is rotated to a position opposite to the first intermediate shaft (2), meanwhile, the outer sleeve of the first intermediate shaft lower bearing (8) is placed into a bearing position at the lower part of the box body, and then the lower end cover (9) of the box body at the bottom of the box body is sealed and closed, and tight contact with the outer sleeve of the first intermediate shaft lower bearing (8) is ensured;
step six, the hollow shaft (5) assembled with the bearing is crashed into the upper part of the box body from the big end, namely the upper part of the box body, and the lower end cover is sealed, and all the end covers at the lower part of the box body are assembled;
hoisting the first intermediate shaft (2) with all the inner sleeves of the bearings at the two sides, aligning the notch position of the outer gear sleeve (7) of the second intermediate shaft, and installing the bearing position of the lower bearing (8) of the first intermediate shaft, wherein the shaft teeth of the first intermediate shaft (2) are meshed with the outer gear sleeve (7) of the second intermediate shaft;
eighth step, hoisting the fast shaft (1), and placing the fast shaft into a bearing position;
and ninth, covering the box body cover, screwing the box body bolt, adjusting and assembling each shaft end cover, adjusting each bearing gap at the upper part, and finally installing the fast shaft coupler.
2. The method for overhauling a vertical roll box of a vertical roll mill according to claim 1, wherein: in the first step, firstly, vertically placing a vertical roller box to be disassembled and inspected into a supporting frame, taking down a coupler of a fast shaft (1), and removing a box body upper cover bolt; then sequentially lifting out the upper end cover (3), the fast shaft (1) and the first intermediate shaft (2) of the box body, and simultaneously dismantling an oil pipe and the upper end cover of the hollow shaft (5); then the box body is lifted out of the supporting frame and laid down, and all end covers at the bottom of the box body are removed; then, the hollow shaft (5) is bumped from the small end to the large end by a columnar object, and the bearing is not required to be bumped; and finally, removing the oil pipe on the shaft top of the second intermediate shaft (6), then withdrawing the second intermediate shaft (6) from one side of the bottom of the box body, and taking out the second intermediate shaft external gear sleeve (7).
3. The method for overhauling a vertical roll box of a vertical roll mill according to claim 1, wherein: in the fourth step, the welding height of the flange on the square cutting hole (10) is determined by the fact that the height of the bolt cap does not protrude out of the machining surface for fixing the box body side after the blind cover is assembled, so that the influence on online use and replacement of the box body is avoided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110820179.5A CN113680826B (en) | 2021-07-20 | 2021-07-20 | Vertical roll box overhauling method of vertical roll mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110820179.5A CN113680826B (en) | 2021-07-20 | 2021-07-20 | Vertical roll box overhauling method of vertical roll mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113680826A CN113680826A (en) | 2021-11-23 |
| CN113680826B true CN113680826B (en) | 2023-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110820179.5A Active CN113680826B (en) | 2021-07-20 | 2021-07-20 | Vertical roll box overhauling method of vertical roll mill |
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| CN (1) | CN113680826B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB674992A (en) * | 1949-09-28 | 1952-07-02 | Sven Erik Malte Norlindh | Improvements in universal rolling mills |
| CN100469471C (en) * | 2007-08-22 | 2009-03-18 | 天津市天发重型水电设备制造有限公司 | Rough rolling vertical roller mill |
| CN101391267B (en) * | 2008-11-04 | 2010-12-01 | 北京首钢建设集团有限公司 | On-line assembling entirety on-position assembling method of edge mill |
| CN102172616B (en) * | 2011-01-11 | 2015-10-14 | 中冶赛迪工程技术股份有限公司 | Upper transmission vertical roll mill, milling train arrangement and roll-changing method |
| CN202290755U (en) * | 2011-09-21 | 2012-07-04 | 天津市中重科技工程有限公司 | Side pressing device and vertical roller box connecting structure of universal mill |
| CN204220622U (en) * | 2014-11-17 | 2015-03-25 | 中国第一重型机械股份公司 | Vertical roller mill system adds roller box structure |
| CN110038903A (en) * | 2018-01-17 | 2019-07-23 | 宝山钢铁股份有限公司 | A kind of rolling-mill housing roller drive arrangement |
| CN112935759A (en) * | 2021-02-02 | 2021-06-11 | 河钢股份有限公司承德分公司 | Method for assembling gear of finishing mill cone box |
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2021
- 2021-07-20 CN CN202110820179.5A patent/CN113680826B/en active Active
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