CN202509412U - Slave hydraulic oil cylinder for building jacking construction - Google Patents
Slave hydraulic oil cylinder for building jacking construction Download PDFInfo
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- CN202509412U CN202509412U CN2012201368089U CN201220136808U CN202509412U CN 202509412 U CN202509412 U CN 202509412U CN 2012201368089 U CN2012201368089 U CN 2012201368089U CN 201220136808 U CN201220136808 U CN 201220136808U CN 202509412 U CN202509412 U CN 202509412U
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- oil cylinder
- hydraulic oil
- jacking
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Abstract
The utility model relates to the bridge heightening technology, in particular to a slave hydraulic oil cylinder for building jacking construction. The slave hydraulic oil cylinder comprises a cylinder body and a jacking mechanism, and the cylinder body is provided with a base. The slave hydraulic oil cylinder is characterized in that the other end of the cylinder body, which is opposite to the base, is provided with a supporting surface which is perpendicular to the jacking direction of the jacking mechanism, and when the slave hydraulic oil cylinder is lowest, a jacking surface of the jacking mechanism and the supporting surface are located on the same plane, or the jacking surface of the jacking mechanism is located between the supporting surface and the base. The slave hydraulic oil cylinder for the building jacking construction has the advantages that the slave hydraulic oil cylinder has a high safety reliability and good synchronism, operability and overall stress performance, the slave hydraulic oil cylinder can be used as a slave supporting mechanism which can effectively support upper bridge lifting bridge girder to prevent the upper bridge girder from sliding down when the oil pressure of the oil cylinder suddenly disappears or an oil pipe cracks, and thereby a reliable guarantee can be provided for bridge jacking engineering safety.
Description
Technical field
The utility model relates to bridge and adds high-tech, is specifically related to a kind of follow-up hydraulic oil cylinder that is used for the building jack-up construction.
Background technology
In at present present river course, railway, the highway rebuilding, the headroom of bridge and existing linear and the newly-built bridge of bridge be linear, and problem such as to be connected be the difficult point problem in the transformation.Domestic many cross a rivers road super expressway bridge because under-clearance is not enough, is faced with the problem of transformation at present.For the transformation of old bridge, traditional method is old bridge to be removed rebuild, and this is with the labor financial resource and material resource, and construction period is long bigger to social influence.The bridge jacking technology has economical rationality as a kind of novel bridge renovation technique, short construction period, and the advantage less to social environment influence has the conventional method incomparable advantage.In order to reduce as far as possible to social influence, shorten construction period, even do not suspend traffic, need carry out jack-up construction to bridge.
At present, job practices commonly used in the bridge jacking technology is the hydraulic jack jacking, and especially in large-tonnage bridge jacking engineering, hydraulic lifting is a unique selection.The hydraulic jack system can provide powerful top lift, and whole hydraulic fluid compressing cylinder system is connected by oil pipe, so when jacking, can play a role jointly.Especially synchronization of jacking up technology of hydraulic jack integral jacking system is mature on the whole at present, adopts PLC Hydraulic Synchronizing control jacking successfully utilization in multinomial order engineering.Hydraulic lifting system itself is also as the support system in the bridge jacking engineering in engineering in the past.But there is very big risk in the hydraulic lifting system as support system: if occur letting out in the hydraulic pressure, accident such as oil pipe explosion, the safety of bridge jacking is on the hazard, even immeasurable security incident takes place during jacking.
A kind of automatic servo-actuated support system and method in Chinese patent 200910046134, have been disclosed; Used in this patent and a kind ofly utilized motor-driven follow-up supporting device to come to support for superstructure; Measure the distance between follow-up supporting device and the superstructure through micrometer and controller, control motor rotating drive follow-up supporting device carries out automatic servo-actuated jacking.The purpose of this method and this system design be when the hydraulic jack decompression as the supplemental support instrument, but have following shortcoming in actual use:
One, the mode that adopts micrometer to measure follow-up supporting device and superstructure spacing in this method (system) is controlled follow-up supporting device and is carried out jacking, and this design concept is difficult the realization in practice of construction.Be different from the machining technique field, in technical field of building construction, generally can't accomplish higher precision, the planeness of the bottom of superstructure is relatively poor relatively, in this kind environment, adopts micrometer bigger error can occur.
Even two cast aside above-mentioned error component, above-mentioned servo-actuated support system still has the problem that can't be overcome.Because micrometer can't measure small distance, cause follow-up supporting device to fit tightly superstructure and have a gap all the time.Like cut off value mentioned in this patent working example is 1mm, promptly mean the follow-up supporting device jacking put in place the back and superstructure between still have the gap about 1 mm.Except that the above-mentioned gap that can't be overcome; Through experiment confirm, underpin the servo-actuated support system when stressed when jack-up hydraulic ram is stressed, when being transformed on the servo-actuated support system along with upper load; Big displacement compression also can appear in follow-up supporting device; The displacement compression analysis of causes has 2 points: one of which, servo-actuated support system inside are to adopt mechanical whorl to carry, and bear the load on top through the elastic deformation of mechanical whorl, when the superstructure load is changed; The mechanical whorl parts are compressed, and produce a change in displacement value; Two, owing to the variation of stressed position of the fulcrum, the compressive strain of the superstructure that causes self because follow-up supporting device can't initiatively follow up, can not be eliminated the deflection of superstructure self.When conversion was stressed, the load of thousands of tons of was transferred to the follow-up supporting device place by the jack-up hydraulic ram place, and corresponding superstructure produces compressive strain.Can be drawn by above-mentioned principle, when conversion was stressed, superstructure can occur one and significantly fall, and the displacement stroke of this whereabouts is the summation that gap described above adds the top offset compression.Certainly, above-mentioned phenomenon exists equally when the cushion block of routine supports superstructure, but because jack-up hydraulic ram is received in the cylinder process, and load is changed gradually, so the process that superstructure falls is in supported state all the time.And when the jack-up hydraulic ram decompression falls after rise, load moment conversion, this moment, superstructure will fall to be close to the mode that does not have to support, and was breakneck and drop in the construction like this.
Three, plug-in servomotor is bigger on the follow-up supporting device, makes that the follow-up supporting device planar dimension is bigger, is difficult for during use installing.
Can know that by above argumentation there are the defective that necessarily can't overcome in actual use in this automatic servo-actuated support system and method, be applied to and still have bigger risk in the bridge jacking construction.
Summary of the invention
The purpose of the utility model is the weak point according to above-mentioned prior art; A kind of follow-up hydraulic oil cylinder that is used for the building jack-up construction is provided; This follow-up hydraulic oil cylinder is fixedly mounted on the superstructure bottom of treating jacking; And the jacking synchronization of jacking up of servo-actuated jack-up hydraulic ram; Simultaneously a stayed surface is set on cylinder body, makes that top act mechanism or the stayed surface through the follow-up hydraulic oil cylinder still can effectively support top jacking bridge, avoid top bridge landing when the oil pressure of oil cylinder suddenly disappears.
The utility model purpose realizes being accomplished by following technical scheme:
A kind of follow-up hydraulic oil cylinder that is used for the building jack-up construction; Said follow-up hydraulic oil cylinder comprises cylinder body and the top act mechanism with base; It is characterized in that: said cylinder body has the stayed surface of lifting mechanism's jacking direction perpendicular to said top with respect to the other end of said base; When said follow-up hydraulic oil cylinder was in minimum constructive height, jacking face and the said stayed surface of mechanism were lifted on same plane or between said stayed surface and said pedestal in said top.
The closed circular of perforate in the middle of said stayed surface is, mechanism's matched in clearance is lifted on said perforate and said top.
Said follow-up hydraulic oil cylinder is the hydraulic fluid compressing cylinder.
Said follow-up hydraulic oil cylinder is the screw hydraulic oil cylinder.
Said surface-supported area is not less than the jacking face area that mechanism is lifted on said top.
The advantage of the utility model is following:
1, the follow-up hydraulic oil cylinder of the utility model adopts machinery to carry, and has avoided accidents such as hydraulic leak or sealing leakage of oil, has good safety reliability with respect to the hydraulic fluid compressing cylinder.
2, the follow-up hydraulic oil cylinder of the utility model adopts hydraulic-driven, when common servo-actuated is pushed up in many servo-actuateds, has guaranteed that many servo-actuateds tops make the synchronism of time spent, verification experimental verification this point.Hydraulically powered servo-actuated top need not servomotor, thus less with respect to the Mechanical Driven scale of construction, be easy to install and use.
3, the contrast verification through testing for several times; This utility model has very high safety reliability; Have good synchronism, operability and holistic resistant behavior, can suddenly disappear or still can effectively support the top bridge during oil pipe explosion as a kind of oil pressure at oil cylinder rises bridge; Avoid the follow-up supporting mechanism of top bridge landing, thereby reliable assurance is provided for the bridge jacking engineering safety.
Description of drawings
Accompanying drawing 1 is a follow-up hydraulic oil cylinder overall structure sketch map.
The specific embodiment
Through embodiment the utility model characteristic and other correlated characteristic are done further explain below in conjunction with accompanying drawing, so that technician's of the same trade understanding:
As shown in Figure 1, label 1-5 representes respectively: mechanism 4, stayed surface 5 are lifted in superstructure 1, cylinder body 2, base 3, top.
Referring to Fig. 1, the follow-up hydraulic oil cylinder adopts the hydraulic fluid compressing cylinder in the present embodiment, mainly lifts mechanism 4 by cylinder body 2 and top and constitutes, and wherein lift in the coaxial oil cylinder that is arranged at cylinder body 2 of mechanism 4 on the top, comprises members such as piston.Cylinder body 2 bottoms are provided with base 3, base 3 and the axis normal setting of settling down mechanism 4.Different with conventional hydraulic jack; The top of cylinder body 2 (with respect to the other end of said base 2) has perpendicular to said top lifts the axial stayed surface 5 of mechanism 4; And the jacking face height of mechanism 4 was lifted on the top when height of stayed surface 5 was in minimum constructive height above the follow-up hydraulic oil cylinder, and the jacking face of top act mechanism 4 was positioned at same plane when perhaps stayed surface 5 was in minimum constructive height with the follow-up hydraulic oil cylinder.The closed circular of perforate in the middle of stayed surface 5 is, mechanism's 4 matched in clearance are lifted on said perforate and said top.When the follow-up hydraulic oil cylinder was received cylinder, its cylinder body 2 constituted a supporter, and the height of its support is the height of the bottom surface of base 3 to stayed surface 5, and this moment, independent bearing load of stayed surface or stayed surface were lifted the jacking face combination bearing load of mechanism 4 with the top.
The follow-up hydraulic oil cylinder is set is when suddenly disappearing, the landing of building superstructure for fear of oil pressure at jack-up hydraulic ram.Follow-up hydraulic oil cylinder 5 is ordered about by the hydraulic-driven pumping plant and carries out work; Its inner mechanical whorl that adopts carries; Bear the load on top through the elastic deformation of mechanical whorl; The follow-up hydraulic oil cylinder is passive stressed, promptly can bear bigger load, but and the active force that provides much smaller than bearing load.It should be noted that; Compare with documents, the active force of following hydraulic jack can make it hold out against the counter-force basis, and offsets the deflection of a part self and the deflection of superstructure; When the jack-up hydraulic ram decompression falls after rise; During load moment conversion, though superstructure still certain displacement can occur, the displacement of this moment is to receive the support of follow-up hydraulic oil cylinder 4.The inner seal of follow-up hydraulic oil cylinder is installed into flowline, and oil pipe is connected to hydraulic power unit or is called on the control pumping plant.During jacking, open this pumping plant, the oil in the pumping plant gets in the follow-up hydraulic oil cylinder through oil pipe, and through the inner screw device of oil pressure actuated follow-up hydraulic oil cylinder, the follow-up hydraulic oil cylinder follows up automatically; When receiving cylinder, oil return, the in-oil cylinder oil of follow-up hydraulic gets into pumping plant.The inside rotary power of follow-up hydraulic oil cylinder is provided by hydraulic power unit, through regulating rising and the decline that direction of rotation gets final product implement device.
When construction, the setting of follow-up hydraulic oil cylinder next-door neighbour jack-up hydraulic ram, its base is fixed on the bottom of superstructure 1.
When the jacking operation, jack-up hydraulic ram jacking superstructure, the follow-up hydraulic oil cylinder follows up automatically;
After the reservation stroke was arrived in the jack-up hydraulic ram jacking, jack-up hydraulic ram stopped jacking, and the follow-up hydraulic oil cylinder stops follow-up;
The follow-up hydraulic oil cylinder is received cylinder afterwards, and pad is put cushion block below the stayed surface 5 of cylinder body 2 afterwards;
Jack-up hydraulic ram is received cylinder afterwards, and stayed surface 5 compresses cushion block and stressed, and the whole loads of bridge are transformed on cylinder body 2 and the cushion block by jack-up hydraulic ram;
Afterwards at jack-up hydraulic ram held cushion block;
After the jack-up hydraulic ram lower cushion block places, repeat above-mentioned steps, arrive a little more than design elevation until jacking.
Although above detailed description through embodiment describes for the technical scheme of the utility model, the scope of law that should be appreciated that this description is limited the words of the utility model appending claims.It only is exemplary should being interpreted as for the detailed description of stopping means in the foregoing description, rather than comprises the embodiment that each is possible.Even because exhaustive each possible embodiment be not impossible also be unpractical.So those skilled in the art obviously should recognize; In the foregoing description for the selection of hydraulic jack kind; Also not only be confined to this; Also can select hydraulic jack according to concrete operating mode, mechanical type hydraulic oil cylinder, electric hydaulic oil cylinder etc., and this still falls within the scope of claims.
Claims (5)
1. follow-up hydraulic oil cylinder that is used for the building jack-up construction; Said follow-up hydraulic oil cylinder comprises cylinder body and the top act mechanism with base; It is characterized in that: said cylinder body has the stayed surface of lifting mechanism's jacking direction perpendicular to said top with respect to the other end of said base; When said follow-up hydraulic oil cylinder was in minimum constructive height, jacking face and the said stayed surface of mechanism were lifted on same plane or between said stayed surface and said pedestal in said top.
2. a kind of follow-up hydraulic oil cylinder that is used for the building jack-up construction according to claim 1 is characterized in that: the closed circular of perforate in the middle of said stayed surface is, mechanism's matched in clearance is lifted on said perforate and said top.
3. a kind of follow-up hydraulic oil cylinder that is used for the building jack-up construction according to claim 1, it is characterized in that: said follow-up hydraulic oil cylinder is the hydraulic fluid compressing cylinder.
4. a kind of follow-up hydraulic oil cylinder that is used for the building jack-up construction according to claim 1, it is characterized in that: said follow-up hydraulic oil cylinder is the screw hydraulic oil cylinder.
5. a kind of follow-up hydraulic oil cylinder that is used for the building jack-up construction according to claim 1 is characterized in that: said surface-supported area is not less than the jacking face area that mechanism is lifted on said top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201368089U CN202509412U (en) | 2012-04-01 | 2012-04-01 | Slave hydraulic oil cylinder for building jacking construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201368089U CN202509412U (en) | 2012-04-01 | 2012-04-01 | Slave hydraulic oil cylinder for building jacking construction |
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| CN202509412U true CN202509412U (en) | 2012-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012201368089U Expired - Lifetime CN202509412U (en) | 2012-04-01 | 2012-04-01 | Slave hydraulic oil cylinder for building jacking construction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104562945A (en) * | 2014-12-26 | 2015-04-29 | 哈尔滨金玉科技开发有限公司 | Hydraulic bridge bearing column |
-
2012
- 2012-04-01 CN CN2012201368089U patent/CN202509412U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104562945A (en) * | 2014-12-26 | 2015-04-29 | 哈尔滨金玉科技开发有限公司 | Hydraulic bridge bearing column |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121031 |