CN201874247U

CN201874247U - Device for pulling pre-stressed steel strands through corrugated tube

Info

Publication number: CN201874247U
Application number: CN2010205885795U
Authority: CN
Inventors: 谢永生; 吴健; 杨军; 常孝亭; 曾炯导
Original assignee: GUANGDONG PROV FOUNDATION ENGINEERING Co
Current assignee: Foundation Design Group Co., Ltd of Guangdong Province
Priority date: 2010-10-29
Filing date: 2010-10-29
Publication date: 2011-06-22
Anticipated expiration: 2020-10-29

Abstract

The utility model discloses a device for pulling pre-stressed steel strands through a corrugated tube. The extension direction of the corrugated tube through which the pre-stressed steel strands pass is set as the axial direction, and the direction opposite to the inner wall of the corrugated tube is set as the radial direction. The device comprises a tractor and a strand collector, wherein a cavity is arranged inside the tractor, and a connecting device is arranged outside the tractor; and the strand collector is fixedly connected with the tractor after being embedded inside the cavity; a plurality of through holes are formed on the strand collector, the diameters of the through holes are larger than the diameters of the steel cores of the pre-stressed steel strands passing through the corrugated tube; and the radial sizes of the tractor and those of the strand collector are both smaller than the inside diameter of the corrugated tube. The device adopts the strand collector to bundle the steel cores of the pre-stressed steel strands together and allow all the pre-stressed steel strands to pass through the corrugated tube in one step, omits the complex procedures of binding and batch traction in the prior art, reduces the number of the construction workers, saves construction time, has a simple structure, is simple and convenient for pulling strands, and is widely applied in the procedure of pulling the pre-stressed steel strands through the corrugated tube in the bridge construction.

Description

A kind of prestress wire lashing bellows arrangement

Technical field

The utility model relates to the prestress wire lashing bellows arrangement in a kind of bridge engineering.

Background technology

Since the development of prestressing technique, multispan one, the continuous box-beam structure bridge of every long hundreds of rice has obtained unprecedented development, and its construction technology reaches its maturity.In the construction of the bridge engineering that carries out this type of, need finish the operation that tens strands of prestress wires are passed bellows usually.Prestress wire is the steel wire with six roots of sensation periphery, is that the mandrel spiral is entwined with a high strength steel core of centre.The implementation method of now general prestress wire lashing bellows, be in bellows, to set one in advance to run through wherein, the draught line that stretch out at two, firm with one of draught line then with several bursts of prestress steel twist line tyings, the other end connects with hoist engine, utilizes the power of hoist engine rolling that the prestress wire that is connected is drawn and pass bellows.Repeat above-mentioned step, need the prestress wire of lashing all to pass through bellows until all.But this loaded down with trivial details way needs that the operator ceaselessly ties up back and forth, elevator, or needs several operators to realize, has so just dragged slowly the duration, and has wasted manpower and materials; Simultaneously, prestress wire is knotting easily in the lashing process, and unbalance stress during stretch-draw causes the tensioning state of part steel strand not reach control prestressing force, is perhaps broken; When the steel strand number of share of stock more for a long time, also can steel strand usually take place and block, lashing smoothly, even bellows can be scratched, and causes spillage, and then the duct stops up, and can't carry out normal stretching construction.Some penetrating device is that a few bundle steel strand are banded in wherein now, and then concentrates traction, but often effect is undesirable.

The utility model content

The purpose of this utility model is for a kind of prestress wire lashing bellows arrangement is provided, and it has simple in structure, and the steel strand lashing is characteristics fast and easily.

The solution that the utility model solves its technical problem is:

A kind of prestress wire lashing bellows arrangement, the bearing of trend of the bellows that passes with needs serves as axial, with bellows inner tubal wall direction in opposite directions for radially, it comprises the buncher that is connected and fixed in tractor after inside is provided with cavity, outside and is provided with the tractor of coupling arrangement and embeds described cavity, described buncher is provided with several through holes, the aperture of described through hole is greater than the steel core diameter of the prestress wire that will pass bellows, and the radial dimension of described tractor and buncher is all less than the interior caliber of bellows.

Be further used as preferred embodiment, the coupling arrangement of described tractor is a hanger.

Be further used as preferred embodiment, the connecting relation of described tractor and buncher is a thread connection.

Be further used as preferred embodiment, the screw thread effective length of described buncher is less than the internal thread effective length in the cavity of tractor, after making that described buncher and tractor are tightened, has the spacing of 10mm between the axial top of buncher and the inner chamber of tractor.

The beneficial effects of the utility model are: the utility model utilizes the steel core boundling of buncher with prestress wire, then with after tractor is connected, just the snap ring of available peripheral hardware, pull rope and hoist engine will design all prestress wires that need and once all pass bellows, exempted the loaded down with trivial details in the past step of tying up, drawing in batches, constructor's quantity and engineering time have been saved, and it is simple in structure, lashing is efficient and convenient, is widely used in the operation operation of prestress wire lashing bellows in the bridge construction.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further described.

Fig. 1 is a sectional view of the present utility model;

Fig. 2 is the rear elevation of buncher of the present utility model;

Fig. 3 is the view of the utility model after installing prestress wire additional.

The specific embodiment

With reference to Fig. 1～Fig. 2, a kind of prestress wire lashing bellows arrangement, the bearing of trend of the bellows that passes with needs serves as axial, with bellows inner tubal wall direction in opposite directions for radially, it comprises the buncher 2 that is connected and fixed in tractor 1 after inside is provided with cavity, outside and is provided with the tractor 1 of coupling arrangement and embeds described cavity, described buncher 2 is provided with several through holes 3, the aperture of described through hole 3 is greater than the steel core diameter of the prestress wire that will pass bellows, and the radial dimension of described tractor 1 and buncher 2 is all less than the interior caliber of bellows.Particularly, the utility model is the interior caliber difference according to bellows, and correspondingly produce the model of different radial dimensions, in general, radial dimension is big more, the quantity of the prestress wire of required boundling is also many more, so the quantity of through hole 3 is also just many more, and this sentences 15 through holes 3 and is example.

Be further used as preferred embodiment, the coupling arrangement of described tractor 1 is a hanger 11.Be provided with hanger 11, just can be by the convenient outer snap ring that connect, link to each other with pull rope in being preset in bellows.

Be further used as preferred embodiment, described tractor 1 is a thread connection with the connecting relation of buncher 2.

Be further used as preferred embodiment, the screw thread effective length of described buncher 2 is less than the internal thread effective length in the cavity of tractor 1, after making that described buncher 2 is tightened with tractor 1, has the spacing of 10mm between the axial top of buncher 2 and the inner chamber of tractor 1.Keeping this spacing, is to flatten anchor after steel core for the ease of prestress wire passes through hole 3.

With reference to Fig. 3, during work, earlier six bursts of peripheral steel wire except that middle high strength steel core of 15 each root of bundle prestress wire are removed a part, the length of removing is at least than the long 10mm of the axial length of buncher 2, then with these 15 steel cores 4 through hole 3 that passes correspondence one by one, and steel core 4 heads stretch out through hole 3 5mm at least, then extension is flattened anchor, screw in buncher 2 in the tractors 1 then and tighten, 15 steel strand are firmly connected fully with the utility model, with Φ 16 snap rings hanger 11 is connected with pull rope in the bellows afterwards, so just finished the pre-preparation of drawing.After hoist engine started, pull rope was brought together, drove the utility model and passed bellows, also indirectly bellows was passed in 15 steel strand tractions, wait pass completely through after, stop hoist engine, the steel core that will expose cuts off, and has promptly finished the lashing action of steel strand.And with tractor 1 with after buncher 2 separates, the residual steel core 4 of the inside is removed, can continue to use the utility model.

More than be that preferable enforcement of the present utility model is specified, but the invention is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent variations or replacement under the prerequisite of spirit of the present invention, modification that these are equal to or replacement all are included in the application's claim institute restricted portion.

Claims

1. prestress wire lashing bellows arrangement, the bearing of trend of the bellows that passes with needs serves as axial, with bellows inner tubal wall direction in opposite directions for radially, it is characterized in that: it comprises that inside is provided with cavity, the buncher (2) that is connected and fixed in tractor (1) after the outside is provided with the tractor (1) of coupling arrangement and embeds described cavity, described buncher (2) is provided with several through holes (3), the aperture of described through hole (3) is greater than the steel core diameter of the prestress wire that will pass bellows, and the radial dimension of described tractor (1) and buncher (2) is all less than the interior caliber of bellows.

2. prestress wire lashing bellows arrangement according to claim 1 is characterized in that: the coupling arrangement of described tractor (1) is hanger (11).

3. prestress wire lashing bellows arrangement according to claim 1 and 2 is characterized in that: described tractor (1) is a thread connection with the connecting relation of buncher (2).

4. prestress wire lashing bellows arrangement according to claim 3, it is characterized in that: the screw thread effective length of described buncher (2) is less than the internal thread effective length in the cavity of tractor (1), after making that described buncher (2) and tractor (1) are tightened, has the spacing of 10mm between the inner chamber of the axial top of buncher (2) and tractor (1).