CN87210677U - Prestress tensioner using a pulley set - Google Patents
Prestress tensioner using a pulley set Download PDFInfo
- Publication number
- CN87210677U CN87210677U CN 87210677 CN87210677U CN87210677U CN 87210677 U CN87210677 U CN 87210677U CN 87210677 CN87210677 CN 87210677 CN 87210677 U CN87210677 U CN 87210677U CN 87210677 U CN87210677 U CN 87210677U
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- CN
- China
- Prior art keywords
- pulley
- assembly
- plate
- prestress
- tensioner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
Abstract
The utility model relates to a prestress tensioner using a pulley set, comprising two pulley set mechanisms, more than one balancing pulley rack, a steel cable set and a tensioning apparatus. The prestress tensioner using a pulley set is a good apparatus for repairing the down-warping and sidewise bending of the main beam of a gantry crane. While in repair, a carrier need not be unloaded, so the prestress tensioner using a pulley set has simple structure, low maintenance cost (which is only about 10% of the equipment cost), and short time (the repair can be completed with only a few days).
Description
The utility model belongs to a kind of bridging crane main beam prosthetic device.
The crane girder metal construction is through after a while use, must the production downwarp, when downwarp reaches certain value,, can cause a serious accident when serious as untimely reparation.According to GB6067-85 " crane safety rules " regulation, when dolly is in span centre and under rated load, the downwarp value of girder span centre is when horizon reaches the L/700 of span, (L is the crane span) as not repairing, should scrap.Therefore, crane girder downwarp occurs and must conscientiously repair.
At present crane girder downwarp reparation is adopted three kinds of ways basically for arch.A kind of is flame correction method, and this way technology is difficult for grasping, because should recover camber, recovers again to go up arch curve, and keeps conplane difference of height and control camber etc., does not have higher technical level and abundant firer's practical experience to be difficult to perform.In addition, when repairing,, dolly be unloaded from above owing to will prevent to heat the back downwarp, take a lot of work, time-consuming, prolonged repair time, as make mistakes and also can cause the girder damage.
Second kind is the prestressing force repairing method, utilizes one to two row's prestressed reinforcement to make beam produce contraflexure moment, thereby reaches the purpose of arch camber, and this restorative procedure has not only overcome the shortcoming of flame method, and method is simple, and has increased the rigidity of beam.But exist every pulling force of presstressed reinforcing steel wayward evenly (adopting single tension respectively), make the main beam structure unbalance stress, and want problems such as pre-pretensioned steel, therefore be restricted in practical application and have certain difficulty, electrothermal prestressing only uses repairing on the little tonnage bridge crane at present.
The third way is that the twisted wire that utilizes of Huang Xiyong invention replaces presstressed reinforcing steel, and utilizes worm decelerating machine to tighten up the method that steel strand are once strained, thereby has overcome the above-mentioned shortcoming that adopts electrothermal prestressing to exist, but structure is complicated.
The purpose of this utility model is to provide a kind of simple in structure, can repair the assembly pulley prestressed takeup of bridging crane main beam downwarp for arch and correction side sway fast.
The utility model is by 2 assembly pulley mechanisms, an above equalizer pulley frame, and wire rope group and tension apparatus constitute.When repairing bridging crane main beam, assembly pulley mechanism, the solid welding of equalizer pulley frame on the bridging crane main beam lower shoe, and are formed an integral body, no matter static load or dynamic loading are all born jointly with girder.The solid welding of assembly pulley mechanism is at the two ends of bridging crane main beam lower shoe, and the equalizer pulley frame then is arranged on the middle part of girder lower shoe, and what of quantity are decided by the length of bridge crane span.Carry out then the assembly pulley wire rope wear around, wear around wire rope with along wearing method.The dead end head of wire rope connects with woollen yarn knitting, woollen yarn knitting length is not less than 15 times of wirerope diameter, length must not be less than 300mm, the wire rope of two assembly pulley mechanisms is worn after finishing, the stretch-draw termination of wire rope and tension apparatus, as the suspension hook of the chain hoist that fixes connects, and connects and adopts the wire clips connection method, according to the different mining of the diameter of the wire rope wire line shoe with different size.
The equalizer pulley frame is mainly used in holder and carries wire rope usefulness, is made by base plate, side plate and steel pipe.
Selecting for use of wire rope group is the working environment according to all kinds of cranes, working system, and lifting capacity and span are selected rope capacity, diameter and group number for use.
Selecting for use of the chain hoist that stretch-draw is used must be determined according to the termination pulling force size that calculates.In carrying out stretching process, the chain hoist that is arranged on the bridging crane main beam two ends should hocket stretch-draw and slowly at the uniform velocity stretch-draw.After the recovery arch reaches required standard, stop stretch-draw, and the stretch-draw termination is blocked in accordance with regulations with wire line shoe, the chain hoist of dismantling.
Because the utility model is to adopt assembly pulley mechanism, the equalizer pulley frame, wire rope group and tension apparatus are repaired bridging crane main beam downwarp and correction side sway, particularly dolly need not disassemble when repairing, therefore not only simple in structure, and maintenance cost is low, (have only equipment cost about 10%) save time (only needing several days time just can fix).
Fig. 1 is that the assembly pulley prestressed takeup connects schematic diagram with gantry crane main beam, and wherein 1 is girder, the 2nd, and assembly pulley mechanism, the 3rd, wire rope group, the 4th, equalizer pulley frame.
Fig. 2 is the structural representation of pulley mechanism.Wherein 5 is rope holes, the 6th, and cover plate, the 7th, supporting plate, 8 and 11 is pulleys, 9 and 10 is axles, the 12nd, pulley frame plate, the 13rd, base plate, the 14th, front and rear baffle, the 15th, backplate.
Fig. 3 is an equalizer pulley frame front view, and Fig. 4 is an equalizer pulley frame left view.Wherein 16 is side plates, and 17 and 18 is steel pipes, the 19th, and base plate.
Now in conjunction with the accompanying drawings 1～4, the utility model is described in further detail.Assembly pulley of the present utility model mechanism is by cover plate 6, supporting plate 7, pulley 8, pulley 11, pulley frame plate 12, base plate 13, backplate 15, axle 9, axle 10 constitutes, backplate 15 is provided with rope hole 5 more than 2, during assembling, base plate 13 is placed on the flat board, with ruler line location, then pulley frame plate 12 is welded on the base plate 13 by the precalculated position point, with pulley 11 and axle 9, is assembled on the pulley frame plate 17 again, the front and rear baffle 14 of burn-oning, by the precalculated position supporting plate 7 is welded on the base plate 13 again, pulley 8 and axle 9 are assembled on the supporting plate 7 burn-on cover plate 6 and backplate 15.
Equalizer pulley frame of the present utility model is made of side plate 16, steel pipe 17, steel pipe 18 and base plate 19.
During assembling, base plate 19 is placed on the flat board, line location is welded in side plate 16 on the base plate 19 then, and steel pipe 18 also is welded on the base plate 19, at last steel pipe 17 is welded in respectively between side plate 16 and the steel pipe 18 on the position.
Claims (3)
1, assembly pulley prestressed takeup, it is characterized in that this device is by 2 assembly pulley mechanisms, an above equalizer pulley frame, wire rope group and tension apparatus constitute, and assembly pulley mechanism and the equal solid welding of balance pulley yoke and form an integral body on the lower shoe of the bridging crane main beam of being repaired, wire rope is worn on two assembly pulleys by the equalizer pulley frame, the one end is a dead end, and the other end is the stretch-draw end, and the stretch-draw termination is connected with the tension apparatus.
2, assembly pulley prestressed takeup according to claim 1, it is characterized in that said assembly pulley mechanism is made of cover plate 6, supporting plate 7, pulley 8, pulley 11, pulley frame plate 12, base plate 13, backplate 15, axle 9 and axle 10, backplate 15 is provided with rope hole 5 more than 2.
3, assembly pulley prestressed takeup according to claim 1 and 2 is characterized in that said equalizer pulley frame is made of side plate 16, steel pipe 17, steel pipe 18 and base plate 19.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87210677 CN87210677U (en) | 1987-10-24 | 1987-10-24 | Prestress tensioner using a pulley set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87210677 CN87210677U (en) | 1987-10-24 | 1987-10-24 | Prestress tensioner using a pulley set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87210677U true CN87210677U (en) | 1988-05-25 |
Family
ID=4825587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87210677 Withdrawn CN87210677U (en) | 1987-10-24 | 1987-10-24 | Prestress tensioner using a pulley set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87210677U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104085782A (en) * | 2014-07-11 | 2014-10-08 | 何书贵 | Bridge crane main beam |
| CN110359380A (en) * | 2019-08-09 | 2019-10-22 | 上海悍马建筑科技有限公司 | The three-dimensional tensioning equipment of concrete foundation cushion cap prestressing force |
-
1987
- 1987-10-24 CN CN 87210677 patent/CN87210677U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104085782A (en) * | 2014-07-11 | 2014-10-08 | 何书贵 | Bridge crane main beam |
| CN110359380A (en) * | 2019-08-09 | 2019-10-22 | 上海悍马建筑科技有限公司 | The three-dimensional tensioning equipment of concrete foundation cushion cap prestressing force |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |