CN109519437B - Device and method for quickly replacing oil cylinder in narrow space - Google Patents
Device and method for quickly replacing oil cylinder in narrow space Download PDFInfo
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- CN109519437B CN109519437B CN201710852800.XA CN201710852800A CN109519437B CN 109519437 B CN109519437 B CN 109519437B CN 201710852800 A CN201710852800 A CN 201710852800A CN 109519437 B CN109519437 B CN 109519437B
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- piston rod
- cylinder barrel
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- oil cylinder
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
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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
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- Mechanical Engineering (AREA)
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Abstract
The invention provides a quick replacement device and a replacement method for an oil cylinder in a narrow space. The invention comprises an upper piston rod connected with a working roller through a square flange, wherein the upper piston rod is connected with a lower piston rod, the lower piston rod is connected with a cylinder barrel, the bottom of the lower piston rod is connected with a rear end cover for fixing the cylinder barrel, the bottom of the cylinder barrel is provided with a support frame, and the bottom of the support frame is provided with an adjusting bolt. The invention can greatly improve the maintenance efficiency, reduce the maintenance time from 24 hours to 1 hour, reduce the maintenance cost of equipment and ensure safe and reliable operation.
Description
The technical field is as follows:
the invention relates to a quick replacement device and a quick replacement method for an oil cylinder in a narrow space, and belongs to the technical field of mechanical equipment.
Background art:
modern steel rolling equipment is highly integrated, and equipment in a rolling mill is very compact in arrangement. Taking a 6-roller 5-stand continuous rolling mill of an acid rolling unit as an example, the rolling mill is of a UCM type, namely, the rolling mill has the functions of transversely moving a middle roller, hydraulically bending a roller and hydraulically bending a working roller. Because of the highly integrated unique design of the equipment, the rolling mill housing is provided with a bending cylinder block for positive and negative bending rolls of the working roll, an emulsion spray beam for cooling the working roll, a locking plate for axially locking the working roll, hydraulic and emulsion pipelines and other auxiliary equipment in a small area of the working roll opening. Moreover, the middle roll shifting cross beam, the roll bending cylinder block used for the middle roll bending, the roll changing track and the like are arranged above and below the region, the equipment maintenance space is small, the replacement and maintenance workload of part of equipment is large and complicated, and particularly, the working roll changing track lifting oil cylinder is arranged inside the transition block (the transition block is used for connecting the working roll bending cylinder block and the housing), the installation position is shown in figure 1, and the replacement workload is very huge.
A common conventional replacement method for the working roll track lifting oil cylinder comprises the following steps:
in view of the fact that the working roll bending cylinder block is installed on the transition block, the transition block is fixed on the mill housing through bolts, and the working roll track lifting cylinder is installed in the transition block, the conventional steps are as follows:
1. firstly, dismantling an upper working roll changing track, a working roll locking plate, an emulsion spray beam, a housing lining plate, a bending roll cylinder block, a bending roll cylinder hydraulic pipeline and a lifting cylinder hydraulic pipeline;
2. then the transition block is removed and hoisted out of the window of the mill housing by hoisting equipment such as a chain block, a crane and the like;
3. then the upper pressing block is removed;
4. then the lifting oil cylinder is dismantled;
5. after the new oil cylinder is replaced, the transition block is hoisted into the window of the memorial archway, and the transition block is installed again;
6. finally, the removed equipment is gradually recovered;
a plurality of devices need to be dismantled in the whole operation process, meanwhile, due to the fact that a memorial archway window is small, overhaul operation is difficult, transition blocks are difficult to hoist and mount, and the like, the oil cylinder replacement operation is not only complicated, time is more than 24 hours, 4 working roll replacement tracks are arranged on each rolling mill to lift the oil cylinders, 20 oil cylinders are arranged on 5 rolling mills in total, and if replacement is carried out according to a conventional method, the workload is extremely large.
In summary, in view of the current situation, the technical staff of the unit actively explores and improves the replacement method, and adopts a method that the piston rod is pulled out from the cylinder barrel after the lower end cover of the oil cylinder is only removed without other equipment, and then the piston rod is sealed and replaced, and then the piston rod is installed in the cylinder barrel, so that the original 24 hours is reduced to 6 hours, but the actual requirements on the site can not be met, and the reason is simple:
firstly, the running state of the equipment cannot be controlled, and the equipment can only be stopped and replaced when the equipment is abnormal and cannot maintain production;
secondly, the oil cleanliness cannot meet the requirement to generate oil loop faults due to rush repair;
in addition, the method has the disadvantages that only the piston rod and the rear end cover seal of the rodless cavity can be replaced, and the end cover seal of the rod cavity of the oil cylinder still has no need to be replaced;
more importantly, the operation is carried out at a narrow and small maintenance space, and the safety of maintenance operators cannot be effectively guaranteed.
Therefore, there is a need for a method and an implementation apparatus that can successfully implement online quick replacement, and thus meet the field maintenance requirements. The task is very urgent, and the cost reduction and the efficiency improvement are of great significance for enterprises. It is necessary to develop a method for rapidly replacing the oil cylinder in the narrow space and a realization device.
Disclosure of Invention
The invention aims to provide a quick replacement device and a replacement method for an oil cylinder in a narrow space, which aim to solve the problems of large maintenance workload, long replacement time, potential safety hazards in operation and the like in the prior art and the replacement scheme.
The above purpose is realized by the following technical scheme:
the utility model provides a narrow and small space hydro-cylinder quick replacement device, includes the upper piston rod through square flange and work roll rail connection, upper piston rod connects lower piston rod, lower piston rod is connected with the cylinder, lower piston rod bottom is connected with the rear end cap that is used for fixed cylinder, the cylinder bottom is provided with the support frame, the support frame bottom is provided with adjusting bolt.
The quick replacement device for the oil cylinder in the narrow space is characterized in that a first connecting bolt is arranged between the upper piston rod and the lower piston rod and is sealed through a plug.
The head of the upper piston rod is of a flat head type.
The device for quickly replacing the oil cylinder in the narrow space is characterized in that a group of second connecting bolts are arranged between the rear end cover and the cylinder barrel.
The device for quickly replacing the oil cylinder in the narrow space is characterized in that the bottom of the cylinder barrel is connected with the support frame through a third connecting bolt.
The device for quickly replacing the oil cylinder in the narrow space is characterized in that a rod cavity hydraulic oil inlet is formed in the side face of the cylinder barrel, the rod cavity hydraulic oil inlet is connected with a blind end channel in the cylinder barrel, and a blind end oil inlet is formed in the bottom of the cylinder barrel.
The device for quickly replacing the oil cylinder in the narrow space is characterized in that a sealing ring is arranged between the cylinder barrel and the lower piston rod.
The quick replacement device for the oil cylinder in the narrow space is characterized in that a positioning bolt connected with a lower piston rod is arranged on the lower portion of an upper piston rod of the oil cylinder.
The method for quickly replacing the oil cylinder by using the oil cylinder quick replacement device in the narrow space comprises the following steps:
(1) stopping the machine for preparation;
(2) dismantling the hydraulic oil pipe of the lifting oil cylinder and the second connecting bolt;
(3) installing a support frame at the same time of the step (2), adjusting the bolt to enable the support frame to be in a horizontal state, and supporting the cylinder barrel by the adjusting bolt;
(4) removing a plug for sealing the through hole of the first connecting bolt, and then removing the first connecting bolt;
(5) the upper piston rod and the square flange are not moved, and the lower piston rod and the cylinder barrel move outwards together;
(6) the new cylinder barrel and the lower piston rod are assembled and then moved into the rack to be placed on a replacing tool, the lower piston rod is rotated through the positioning bolt, the angle position of the lower piston rod is aligned, and the boss on the upper portion of the lower piston rod can enter the groove on the lower portion of the upper piston rod.
(7) Sequentially mounting the first connecting bolt, the plug, the rear end cover and the hydraulic oil pipe;
(8) detecting oil with pressure: checking the control and leakage effects to determine whether the process requirements are met;
(9) and starting the computer.
Has the advantages that:
the invention can change the original method of dismantling and installing the peripheral equipment of the transition block of the lifting oil cylinder, then dismantling the transition block and replacing the lifting oil cylinder off line, and realize that the oil cylinder is replaced without dismantling any peripheral equipment except the oil cylinder, and the invention is used in the actual production. The method for rapidly replacing and the device for realizing the method can well meet the requirement of cold rolling high-speed continuous production, and compared with the prior art, the method has the obvious advantages that: 1) the stability and reliability of the oil cylinder assembly and disassembly are greatly improved, and the phenomenon of frequent faults is avoided; 2) the overhaul load and the overhaul time are greatly shortened, the original overhaul time which needs 24 hours is directly shortened to 1 hour, and the labor efficiency is improved by more than 20 times; 3) the tool can be used on all or most of the same type of systems; 4) the direct economic benefit of one-time online maintenance is more than 30 ten thousand yuan.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of an upper piston rod of the present invention.
Fig. 3 is a top view of the upper piston rod of the present invention.
In the figure: 1. a square flange; 2. an upper piston rod; 3. a lower piston rod; 4. a cylinder barrel; 5. a rear end cap; 6. a support frame; 7. adjusting the bolt; 8. a first connecting bolt; 9. a plug; 10. a second connecting bolt; 11. a third connecting bolt; 12. a rod cavity hydraulic oil inlet; 13. a blind end passage in the cylinder barrel; 14. a blind end oil inlet; 15. and (5) sealing rings.
Detailed Description
The present invention will be further illustrated below with reference to specific embodiments, which are to be understood as merely illustrative and not limitative of the scope of the present invention.
As shown in fig. 1-3, the quick replacement device for the oil cylinder in the narrow space of the embodiment comprises an upper piston rod 2 connected with a working roll rail through a square flange 1, the upper piston rod is connected with a lower piston rod 3, the lower piston rod is connected with a cylinder barrel 4, the bottom of the lower piston rod is connected with a rear end cover 5 for fixing the cylinder barrel, the bottom of the cylinder barrel is provided with a support frame 6, and the bottom of the support frame is provided with an adjusting bolt 7.
Narrow and small space hydro-cylinder quick replacement device, last piston rod and lower piston rod between be provided with a connecting bolt 8 to it is sealed through end cap 9.
The head of the upper piston rod is of a flat head type. The flat head is arranged in the groove of the track; the structural design prevents the upper piston rod from rotating, the upper part of the upper piston rod is provided with external threads which are connected with the square flange, and the square flange is fixed with the roller changing track of the working roller through bolts.
The quick replacement device for the oil cylinder in the narrow space is characterized in that a group of second connecting bolts 10 are arranged between the rear end cover and the cylinder barrel.
The device for quickly replacing the oil cylinder in the narrow space is characterized in that the bottom of the cylinder barrel is connected with the support frame through a third connecting bolt 11.
The device for quickly replacing the oil cylinder in the narrow space is characterized in that a rod cavity hydraulic oil inlet 12 is formed in the side face of the cylinder barrel, the rod cavity hydraulic oil inlet is connected with a blind end channel 13 in the cylinder barrel, and a blind end oil inlet 14 is formed in the bottom of the cylinder barrel. The two hydraulic oil pipes which are arranged in the rod cavity and the rodless cavity at the lower part are separately arranged, the hydraulic oil inlet (15) of the rod cavity is arranged on the side surface of the cylinder barrel, the oil pipe joint and the oil pipe are convenient to disassemble and assemble after the two hydraulic oil pipes are separately arranged, and the downtime is also greatly shortened when oil leakage of the pipeline and the joint is processed.
The device for quickly replacing the oil cylinder in the narrow space is characterized in that a sealing ring 15 is arranged between the cylinder barrel and the lower piston rod.
The quick replacement device for the oil cylinder in the narrow space is characterized in that a positioning bolt connected with a lower piston rod is arranged on the lower portion of an upper piston rod of the oil cylinder.
The method for quickly replacing the oil cylinder by using the oil cylinder quick replacement device in the narrow space comprises the following steps:
(1) stopping the machine for preparation;
(2) dismantling the hydraulic oil pipe of the lifting oil cylinder and the second connecting bolt;
(3) installing a support frame at the same time of the step (2), adjusting the bolt to enable the support frame to be in a horizontal state, and supporting the cylinder barrel by the adjusting bolt;
(4) removing a plug for sealing the through hole of the first connecting bolt, and then removing the first connecting bolt;
(5) the upper piston rod and the square flange are not moved, and the lower piston rod and the cylinder barrel move outwards together;
(6) the new cylinder barrel and the lower piston rod are assembled and then moved into the rack to be placed on a replacing tool, the lower piston rod is rotated through the positioning bolt, the angle position of the lower piston rod is aligned, and the boss on the upper portion of the lower piston rod can enter the groove on the lower portion of the upper piston rod.
(7) Sequentially mounting the first connecting bolt, the plug, the rear end cover and the hydraulic oil pipe;
(8) detecting oil with pressure: checking the control and leakage effects to determine whether the process requirements are met;
(9) and starting the computer.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and additions can be made without departing from the method of the present invention, and these modifications and additions should also be regarded as the protection scope of the present invention.
Claims (6)
1. The utility model provides a narrow and small space hydro-cylinder quick replacement device which characterized in that: the hydraulic cylinder comprises an upper piston rod connected with a working roller through a square flange, wherein the upper piston rod is connected with a lower piston rod, the lower piston rod is connected with a cylinder barrel, the bottom of the lower piston rod is connected with a rear end cover used for fixing the cylinder barrel, the bottom of the cylinder barrel is provided with a support frame, and the bottom of the support frame is provided with an adjusting bolt; a first connecting bolt is arranged between the upper piston rod and the lower piston rod and is sealed by a plug; the head of the upper piston rod is flat.
2. The fast replacing device for the oil cylinder in the narrow space according to claim 1, which is characterized in that: and a group of second connecting bolts are arranged between the rear end cover and the cylinder barrel.
3. The fast replacing device for the oil cylinder in the narrow space according to claim 1, which is characterized in that: the bottom of the cylinder barrel is connected with the support frame through a third connecting bolt.
4. The fast replacing device for the oil cylinder in the narrow space according to claim 1, which is characterized in that: the side surface of the cylinder barrel is provided with a rod cavity hydraulic oil inlet, the rod cavity hydraulic oil inlet is connected with a blind end channel in the cylinder barrel, and the bottom of the cylinder barrel is provided with a blind end oil inlet.
5. The fast replacing device for the oil cylinder in the narrow space according to claim 1, which is characterized in that: and a sealing ring is arranged between the cylinder barrel and the lower piston rod.
6. A method for rapidly replacing an oil cylinder by using the device for rapidly replacing an oil cylinder in a narrow space as claimed in any one of claims 1 to 5, which is characterized in that: the method comprises the following steps:
(1) stopping the machine for preparation;
(2) dismantling the hydraulic oil pipe of the lifting oil cylinder and the second connecting bolt;
(3) installing a support frame at the same time of the step (2), adjusting the bolt to enable the support frame to be in a horizontal state, and supporting the cylinder barrel by the adjusting bolt;
(4) removing a plug for sealing the through hole of the first connecting bolt, and then removing the first connecting bolt;
(5) the upper piston rod and the square flange are not moved, and the lower piston rod and the cylinder barrel move outwards together;
(6) after the new cylinder barrel and the lower piston rod are assembled, the new cylinder barrel and the lower piston rod are moved into the frame and placed on a replacing tool, the lower piston rod is rotated, the angle position of the lower piston rod is aligned, and a boss at the upper part of the lower piston rod can enter a groove at the lower part of the upper piston rod;
(7) sequentially mounting the first connecting bolt, the plug, the rear end cover and the hydraulic oil pipe;
(8) detecting oil with pressure: checking the control and leakage effects to determine whether the process requirements are met;
(9) and starting the computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710852800.XA CN109519437B (en) | 2017-09-20 | 2017-09-20 | Device and method for quickly replacing oil cylinder in narrow space |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710852800.XA CN109519437B (en) | 2017-09-20 | 2017-09-20 | Device and method for quickly replacing oil cylinder in narrow space |
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| Publication Number | Publication Date |
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| CN109519437A CN109519437A (en) | 2019-03-26 |
| CN109519437B true CN109519437B (en) | 2020-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710852800.XA Active CN109519437B (en) | 2017-09-20 | 2017-09-20 | Device and method for quickly replacing oil cylinder in narrow space |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201310503Y (en) * | 2008-12-12 | 2009-09-16 | 天津钢管集团股份有限公司 | Mill locking cylinder structure |
| KR20130074858A (en) * | 2011-12-27 | 2013-07-05 | 두산인프라코어 주식회사 | Construction machinery with cylinder apparatus employing mr damper |
| EP2612982A2 (en) * | 2012-01-04 | 2013-07-10 | National Oilwell Varco, L.P. | Apparatus and method for positioning connection equipment |
| CN103452947A (en) * | 2013-09-09 | 2013-12-18 | 宜昌盼盼木制品有限责任公司 | Split type cylinder core rod of hydraulic oil cylinder |
| CN206054438U (en) * | 2016-08-31 | 2017-03-29 | 奉化市鑫潮自动化元件有限公司 | A kind of double action bounce cylinder |
-
2017
- 2017-09-20 CN CN201710852800.XA patent/CN109519437B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201310503Y (en) * | 2008-12-12 | 2009-09-16 | 天津钢管集团股份有限公司 | Mill locking cylinder structure |
| KR20130074858A (en) * | 2011-12-27 | 2013-07-05 | 두산인프라코어 주식회사 | Construction machinery with cylinder apparatus employing mr damper |
| EP2612982A2 (en) * | 2012-01-04 | 2013-07-10 | National Oilwell Varco, L.P. | Apparatus and method for positioning connection equipment |
| CN103452947A (en) * | 2013-09-09 | 2013-12-18 | 宜昌盼盼木制品有限责任公司 | Split type cylinder core rod of hydraulic oil cylinder |
| CN206054438U (en) * | 2016-08-31 | 2017-03-29 | 奉化市鑫潮自动化元件有限公司 | A kind of double action bounce cylinder |
Non-Patent Citations (1)
| Title |
|---|
| JCOE成型机主油缸更换方案及调整方法;高财禄等;《工艺与设备》;20160930;第39卷(第9期);第35-36页 * |
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| CN109519437A (en) | 2019-03-26 |
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