CN203297194U - Lifting hydraulic cylinder for stepping cooling bed - Google Patents
Lifting hydraulic cylinder for stepping cooling bed Download PDFInfo
- Publication number
- CN203297194U CN203297194U CN2013203634724U CN201320363472U CN203297194U CN 203297194 U CN203297194 U CN 203297194U CN 2013203634724 U CN2013203634724 U CN 2013203634724U CN 201320363472 U CN201320363472 U CN 201320363472U CN 203297194 U CN203297194 U CN 203297194U
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- China
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- piston rod
- hydraulic cylinder
- lifting hydraulic
- pilot spool
- buffering
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Abstract
The utility model discloses a lifting hydraulic cylinder for a stepping cooling bed, belongs to the technical field of lifting hydraulic cylinders and is used for protecting hydraulic cylinders against impact damage. According to the technical scheme, a buffer block is added at the tail of a piston rod of the lifting hydraulic cylinder, the buffer block is connected with the tail of the piston rod through a conical spring, and a buffering orifice is formed in the piston rod; a guiding plunger is installed at the tail of the piston rod, the rear end of the guiding plunger is connected with the buffer block at the tail of the piston rod, the conical spring is sleeved on the guiding plunger, and a small orifice is formed in the side wall of the guiding plunger. According to the lifting hydraulic cylinder, the conical spring is used, so that the buffering cavity pressure is basically close to an ideal curve; the guiding plunger is improved, so that the variable throttling buffering is achieved, the throttling area is reduced with the increase of the buffering stroke, the kinetic energy is absorbed uniformly, pressure pulses and excessive buffering cavity pressure peaks of the lifting hydraulic cylinder are avoided, the pressure is changed in a gradual change process, impacts are buffered under a large load, damage of the hydraulic cylinder is prevented, and smooth production is guaranteed.
Description
Technical field
The utility model relates to the lifting hydraulic cylinder that a kind of steel plant continuous casting machine step cooling bed uses, and belongs to the lifting hydraulic cylinder technical field.
Technical background
The casting machine step cooling bed is the visual plant of casting machine, and the strand that casting machine is produced is cooling by cold bed, aligning, then ejection, piling, and step cooling bed is alternately fulfiled assignment by four lifting hydraulic cylinders and two translation oil hydraulic cylinders.In actual moving process, find, the cylinder bolt of cold bed hoist cylinder often breaks, and causes the cylinder block leakage of oil, and steel production is drawn in impact normally.The reason that produces this situation is that the piston of cold bed hoist cylinder is while moving downward under the acting in conjunction that the deadweight of the hydraulic oil of certain pressure, cold bed and cooling bed steel-feeding base weight are arranged, when moving to stroke end, the cold bed hoist cylinder has larger kinetic energy, though the cold bed lifting hydraulic cylinder adopts the hydraulic throttle mode to cushion piston, but the impact that kinetic energy produces still has destructiveness, therefore may cause damage to cylinder body.
Hydraulic cylinder travel end way to play for time commonly used has at present: ⑴ energy snubber method, this method is that the hydraulic oil that finally will flow back to fuel tank in the oil hydraulic cylinder low-pressure cavity is closed, by throttle orifice or gap, flow out, to reach the purpose of deceleration, fluid in the simultaneous buffering chamber is pressed in producing, and with the effect of opposing inertial force and other external force, realizes buffering.⑵ off-load buffer method, this method are when piston movement arrives terminal, make the fluid of the hyperbaric chamber of oil hydraulic cylinder flow back to fuel tank, and this method can only be eliminated the impact that pressure causes, can not eliminate the impact that inertial force causes.For the very large oil hydraulic cylinder of impact force, the effect of above two kinds of hydraulic cylinder travel end ways to play for time commonly used is not ideal.
The model utility content
Technical problem to be solved in the utility model is to provide a kind of step cooling bed lifting hydraulic cylinder, this step cooling bed oil hydraulic cylinder can avoid occurring pressure pulse and too high buffer cavity pressure peak value, make the progressive formation that is changed to of pressure, than shock absorbing under heavy load.
The technological scheme that solves the problems of the technologies described above is:
A kind of step cooling bed lifting hydraulic cylinder, it comprises cylinder body, front cover, rear end cover, vestibule, rear ear, piston, piston rod, there is the rod chamber filler opening front portion of cylinder body, there is the rodless cavity filler opening at the rear portion of cylinder body, its improvements are, its piston rod afterbody has increased buffer stopper, buffer stopper is connected with the afterbody of piston rod by cone shaped spring, damping throttle orifice is arranged on piston rod, one end of damping throttle orifice is at the end face opening of piston rod, the other end of damping throttle orifice is in the sidewall upper shed of piston rod, and damping throttle orifice is parallel with the piston rod sidewall.
Above-mentioned step cooling bed lifting hydraulic cylinder, it also has pilot spool, the afterbody of piston rod has axial mounting hole, the front end of pilot spool is inserted in mounting hole, the rear end of pilot spool is connected with the buffer stopper of piston rod afterbody, cone shaped spring is sleeved on pilot spool, and the sidewall of pilot spool and the mounting hole of piston rod, for being slidably connected, have throttling pore on the sidewall of pilot spool.
Above-mentioned step cooling bed lifting hydraulic cylinder, the front end sleeve of described pilot spool is equipped with back-up ring, and back-up ring is between the mounting hole of the sidewall of pilot spool and piston rod.
The beneficial effects of the utility model are:
The utility model has increased buffer stopper, cone shaped spring, and pilot spool is improved, by adopting cone shaped spring, make buffer cavity pressure substantially near ideal curve, by improving pilot spool, realize the variable throttling buffering, orifice size is reduced with the increase of cushion stroke, make the absorption of kinetic energy more even, avoid lifting hydraulic cylinder pressure pulse and too high buffer cavity pressure peak value to occur, made the progressive formation that is changed to of pressure, than under heavy load, cushioned impact, prevented that oil hydraulic cylinder is damaged, guaranteed carrying out smoothly of production.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the partial enlarged drawing of Fig. 1.
In figure, mark is as follows: vestibule 1, rod chamber filler opening 2, pilot spool 3, piston 4, cone shaped spring 5, rodless cavity filler opening 6, buffer stopper 7, front cover 8, piston rod 9, back-up ring 10, throttling pore 11, rear ear 12, rear end cover 13, damping throttle orifice 14, cylinder body 15.
Embodiment
The utility model comprises cylinder body 15, front cover 8, rear end cover 13, vestibule 1, rear ear 12, piston 4, piston rod 9, buffer stopper 7, cone shaped spring 5, pilot spool 3.
In figure, show, front cover 8 and vestibule 1 are arranged on the front end of cylinder body 15, and rear end cover 13 and rear ear 12 are arranged on the rear end of cylinder body 15, in the front portion of cylinder body 15, rod chamber filler opening 2 are arranged, and there is rodless cavity filler opening 6 at the rear portion of cylinder body 15.
In figure, show, piston rod 9 afterbodys have increased buffer stopper 7, and buffer stopper 7 is connected with the afterbody of piston rod 9 by cone shaped spring 5, and when buffer stopper 7 withstood on rear end cover 13 inboard, buffer stopper 7 and cone shaped spring 5 can play buffer function to piston rod 9.
In figure, show that damping throttle orifice 14 is arranged on piston rod 9, an end of damping throttle orifice 14 is at the end face opening of piston rod 9, and the other end of damping throttle orifice 14 is in the sidewall upper shed of piston rod 9, damping throttle orifice 9 and piston rod 9 parallel sidewalls.Fluid in rodless cavity can be discharged from damping throttle orifice 14, realizes throttling buffering.
In figure, show, there is axial mounting hole at the rear portion of piston rod 9, the front end of pilot spool 3 is inserted in mounting hole, the rear end of pilot spool 3 is connected with the buffer stopper 7 of piston rod 9 afterbodys, cone shaped spring 5 is sleeved on pilot spool 3, the mounting hole of the sidewall of pilot spool 3 and piston rod 9 is for being slidably connected, and the front portion of pilot spool 3 can be moved in the mounting hole of piston rod 9.Throttling pore 11 is arranged on the sidewall of pilot spool 3, and the fluid in rodless cavity can be discharged from throttle orifice 11, realizes throttling buffering.
In figure, show, the front end sleeve of pilot spool 3 is equipped with back-up ring 19, and back-up ring 10 is between the mounting hole of the sidewall of pilot spool 3 and piston rod 9.
Working procedure of the present utility model is as follows:
When 2 oil-feed of rod chamber filler opening, 6 oil returns of rodless cavity filler opening, piston 4 end cap 13 directions motions backward, buffer stopper 7 under the effect of shaft block ring 10 and cone shaped spring 5 also along with piston 4 end cap 13 directions motions backward.When buffer stopper 7 moves to the inboard cylinder cap Planar Compound of rear end cover 13, in rodless cavity, form the buffering oil pocket, the fluid that is closed can only be discharged, thereby realize throttling buffering from throttle orifice 11, damping throttle orifice 14.
On the pilot spool 3 that connects due to buffer stopper 7, set up throttling pore 11, when piston 4, backward during end cap 13 directions motion, by the quantity that changes throttle orifice 11, change orifice size, thereby reach the effect of variable throttling.Its Conversion of Energy mechanism is to be kinetic transformation heat energy, and heat energy is taken out of outside oil hydraulic cylinder by the fluid of circulation.
When 6 oil-feeds of rodless cavity filler opening, during 2 oil return of rod chamber filler opening, piston 4 reversing motions, piston 4 can not produce because thrust is not enough the phenomenon that starting is slow or difficult yet, and piston 4 is end cap 8 motions forward normally.
Claims (3)
1. step cooling bed lifting hydraulic cylinder, it comprises cylinder body (15), front cover (8), rear end cover (13), vestibule (1), rear ear (12), piston (4), piston rod (9), there is rod chamber filler opening (2) front portion of cylinder body (15), there is rodless cavity filler opening (6) at the rear portion of cylinder body, it is characterized in that: its piston rod (9) afterbody has increased buffer stopper (7), buffer stopper (7) is connected with the afterbody of piston rod (9) by cone shaped spring (5), damping throttle orifice (14) is arranged on piston rod (9), one end of damping throttle orifice (14) is at the end face opening of piston rod (9), the other end of damping throttle orifice (14) is in the sidewall upper shed of piston rod (9), damping throttle orifice (14) and piston rod (9) parallel sidewalls.
2. step cooling bed lifting hydraulic cylinder according to claim 1, it is characterized in that: it also has pilot spool (3), the afterbody of piston rod (9) has axial mounting hole, the front end of pilot spool (3) is inserted in mounting hole, the rear end of pilot spool (3) is connected with the buffer stopper (7) of piston rod (9) afterbody, cone shaped spring (5) is sleeved on pilot spool (3), the mounting hole of the sidewall of pilot spool (3) and piston rod (9), for being slidably connected, has throttling pore (11) on the sidewall of pilot spool (3).
3. step cooling bed lifting hydraulic cylinder according to claim 2, it is characterized in that: the front end sleeve of described pilot spool (3) is equipped with back-up ring (10), and back-up ring (10) is positioned between the mounting hole of the sidewall of pilot spool (3) and piston rod (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203634724U CN203297194U (en) | 2013-06-24 | 2013-06-24 | Lifting hydraulic cylinder for stepping cooling bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203634724U CN203297194U (en) | 2013-06-24 | 2013-06-24 | Lifting hydraulic cylinder for stepping cooling bed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203297194U true CN203297194U (en) | 2013-11-20 |
Family
ID=49573204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203634724U Expired - Fee Related CN203297194U (en) | 2013-06-24 | 2013-06-24 | Lifting hydraulic cylinder for stepping cooling bed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203297194U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106151158A (en) * | 2015-03-26 | 2016-11-23 | 北京航天试验技术研究所 | A kind of voltage stabilizing output cylinder |
| CN111577686A (en) * | 2020-05-18 | 2020-08-25 | 广东志成电液科技有限公司 | Stepping hydraulic equipment and control method thereof |
| CN114309519A (en) * | 2020-09-29 | 2022-04-12 | 上海梅山钢铁股份有限公司 | Method for determining elasticity coefficient of load-reducing spring of continuous casting stopper rod flow control mechanism |
-
2013
- 2013-06-24 CN CN2013203634724U patent/CN203297194U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106151158A (en) * | 2015-03-26 | 2016-11-23 | 北京航天试验技术研究所 | A kind of voltage stabilizing output cylinder |
| CN111577686A (en) * | 2020-05-18 | 2020-08-25 | 广东志成电液科技有限公司 | Stepping hydraulic equipment and control method thereof |
| CN114309519A (en) * | 2020-09-29 | 2022-04-12 | 上海梅山钢铁股份有限公司 | Method for determining elasticity coefficient of load-reducing spring of continuous casting stopper rod flow control mechanism |
| CN114309519B (en) * | 2020-09-29 | 2024-06-04 | 上海梅山钢铁股份有限公司 | Method for determining spring elastic coefficient of load shedding spring of continuous casting stopper rod flow control mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131120 Termination date: 20150624 |
|
| EXPY | Termination of patent right or utility model |