CN205818148U - The threader of prestressed box girder steel strand wires - Google Patents
The threader of prestressed box girder steel strand wires Download PDFInfo
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- CN205818148U CN205818148U CN201620531035.2U CN201620531035U CN205818148U CN 205818148 U CN205818148 U CN 205818148U CN 201620531035 U CN201620531035 U CN 201620531035U CN 205818148 U CN205818148 U CN 205818148U
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- tapered rod
- steel strand
- box girder
- penetration pipe
- prestressed box
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Abstract
The utility model discloses the threader of a kind of prestressed box girder steel strand wires, solve prestressed box girder prefabricated time the time-consuming effort that exists when steel strand wires threading and the high problem of construction cost.The one end being included in penetration pipe (2) is fixedly welded with conical funnel, the little head end of tapered rod (1) is provided with self-locking drag hook, tapered rod (1) is movably arranged in penetration pipe (2), the little head end of tapered rod (1) fixes the conical funnel welded in the same direction with one end of penetration pipe (2), it is evenly equipped with between the medial wall of tapered rod (1) and penetration pipe (2) by steel strand (6), steel wire rope (4) links together with the self-locking drag hook of setting on the little head end of tapered rod (1) after sequentially passing through prestressed box girder duct (3) and conical funnel.This utility model improves the mechanization degree of threading operation, provides cost savings, and improves efficiency of construction.
Description
Technical field
The present invention relates to a kind of prestressed box girder prefabricated time steel strand wires threader, particularly to one in factory
Steel strand wires threader when change making railway prestressed box girder is prefabricated and threading method thereof.
Background technology
Prestress engineering is an important subdivisional work of railway large-scale prefabricated box-beam, wherein the string bundle of prestress wire
For a basic working procedure of post-tensioned prestressing mining under railways construction, the lashing workload of steel strand wires is relatively large, and in certain journey
Restricted by narrow space and duration are urgent on degree, the efficiency of construction of post-stressed mining under railways is produced bigger shadow
Ring.The post-stressed railway threading construction method of tradition is: after prestress wire compiles bundle by the radical of design, by steel strand wires
Head steel wire is tightened, and uses manpower to pierce into from one end, box girder pre-stressed duct, until through the position required by the other end of duct
Put.Owing to steel wire bundle is longer, general a length of 24-32 rice, corresponding quality is the biggest, therefore during steel stranded wire penetrating adapter, needs
6-8 people operates simultaneously and carries out.During lashing, owing to steel wire bundle has certain flexibility, with cell walls can produce collision and
Friction, causes lashing operation difficulty, the most relatively long, and the most often the lashing of bundle steel strand starts to lashing from colligation head
After need 20-40 minute, restraint steel strand wires by every Pin box beam 27 and calculate, 9-18 hour ability is about wanted in the lashing of every Pin box beam work
Can complete.This method wastes time and energy, and the progress of box girder construction is had bigger restriction.Significantly cut off owing to steel strand wires head has
Face, and the sharpest, during steel stranded wire penetrating adapter, serious with the collision friction of cell walls.For this problem, partial prestressing
Construction technical staff changes the colligation of steel strand wires head into gas weld joint, and making each steel strand wires is an entirety by being welded to connect,
And a more significantly circular arc is formed in end, and reducing the difficulty of lashing, the time of lashing simultaneously is also greatly shortened.But this
The drawback of method is: gas weld joint has certain heat affecting to steel strand wires, and steel strand wires grow 30 centimetres when lower material containing than design,
After treating lashing, welding 30 centimetres of end is cut away with abrasive machine, to ensure original length of steel strand wires and rigidity not
Become.There is waste steel strand wires material and improve the defect of construction cost.
Summary of the invention
The invention provides the threader of a kind of prestressed box girder steel strand wires, solve prestressed box girder pre-
The time-consuming effort existed when steel strand wires threading time processed and the high technical problem of construction cost.
The present invention is to solve above technical problem by the following technical programs:
The threader of a kind of prestressed box girder steel strand wires, including hoist engine, prestressed box girder duct, threading
Pipe, tapered rod and by steel strand, be provided with steel wire rope on hoist engine, is fixedly welded with cone leakage in one end of penetration pipe
Bucket, the little head end of tapered rod is provided with self-locking drag hook, tapered rod is movably arranged in penetration pipe, the little head end of tapered rod with
The conical funnel of welding is fixed in the same direction in one end of penetration pipe, uniform between tapered rod and the medial wall of penetration pipe
Have by steel strand, steel wire rope sequentially pass through after prestressed box girder duct and conical funnel with on the little head end of tapered rod
The self-locking drag hook arranged links together.
The a length of 40-50 millimeter of the conical funnel of welding is fixed in one end of penetration pipe, and the top diameter of tapered rod is little
Diameter in conical funnel mouth.
The threading method of a kind of prestressed box girder steel strand wires, comprises the following steps:
The first step, one end of penetration pipe weld conical funnel, make tapered rod, make the top diameter of tapered rod be less than
The diameter of conical funnel mouth, the diameter at butt end of tapered rod is more than the diameter of conical funnel mouth, on the little head end of tapered rod
Self-locking drag hook is set；
Second step, by long reinforcing bar from left to right through prestressed box girder duct, stretching out prestressed box girder hole
The termination of connecting steel wire ropes on the long steel bar end of road right-hand member, then pull stretches out the long reinforcing bar of prestressed box girder duct left end
Head, by the termination of steel wire rope from right to left through prestressed box girder duct, by the microcephaly of the termination of steel wire rope Yu tapered rod
The self-locking drag hook arranged on end links together；
3rd step, will be distributed on around tapered rod by the termination of steel strand, and simultaneously by by the termination of steel strand
It is tucked in penetration pipe with tapered rod；
4th step, start hoist engine after, rope traction tapered rod, penetration pipe and by steel strand through post-tensioned prestressing
Box beam duct.
Present invention employs the principle of fusiformis threading, designed by the conical section of this threading apparatus front end, reduce front end
Cross dimensions, substantially reduces the collision friction resistance in threading process, it is achieved that each parts of fusiformis threading apparatus are at threading process
Self-locked, fast and stable is reliable, drastically increases the mechanization degree of threading operation, provides cost savings, improves construction
Efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the threading apparatus of present invention structural representation when entering into prestressed box girder duct 3；
Fig. 3 is the fusiformis threading apparatus structural representation when threading；
Fig. 4 is that the I-I in Fig. 3 is to sectional view；
Fig. 5 is that the II-II in Fig. 3 is to sectional view.
Detailed description of the invention
The present invention is described in detail below in conjunction with the accompanying drawings:
The threader of a kind of prestressed box girder steel strand wires, including hoist engine 5, prestressed box girder duct 3, wears
Spool 2, tapered rod 1 and by steel strand 6, be provided with steel wire rope 4 on hoist engine 5, be fixedly welded with in one end of penetration pipe 2
Conical funnel, is provided with self-locking drag hook on the little head end of tapered rod 1, and tapered rod 1 is movably arranged in penetration pipe 2, taper
The rod little head end of 1 fixes the conical funnel welded in the same direction with one end of penetration pipe 2, at tapered rod 1 and penetration pipe 2
Medial wall between be evenly equipped with by steel strand 6, steel wire rope 4 sequentially passes through prestressed box girder duct 3 and conical funnel
Link together with the self-locking drag hook of setting on the little head end of tapered rod 1 afterwards.
The a length of 40-50 millimeter of the conical funnel of welding, the top diameter of tapered rod 1 are fixed in one end of penetration pipe 2
Diameter less than conical funnel mouth.
The threading method of a kind of prestressed box girder steel strand wires, comprises the following steps:
The first step, one end of penetration pipe 2 weld conical funnel, make tapered rod 1, make the top diameter of tapered rod 1
Less than the diameter of conical funnel mouth, the diameter at butt end of tapered rod 1 more than the diameter of conical funnel mouth, little at tapered rod 1
Self-locking drag hook is set on head end；
Second step, by long reinforcing bar from left to right through prestressed box girder duct 3, stretching out prestressed box girder hole
The termination of connecting steel wire ropes 4 on the long steel bar end of road 3 right-hand member, then pull stretches out the length of prestressed box girder duct 3 left end
Steel bar end, by the termination of steel wire rope 4 from right to left through prestressed box girder duct 3, by termination and the tapered rod of steel wire rope 4
The self-locking drag hook arranged on the little head end of 1 links together；
3rd step, tapered rod 1 will be distributed on around by the termination of steel strand 6, and simultaneously by the end by steel strand 6
Head and tapered rod 1 are tucked in penetration pipe (2)；
4th step, start hoist engine 5 after, steel wire rope 4 draw tapered rod 1, penetration pipe 2 and by steel strand 6 through posttension
Prestress box beam duct 3.
The fusiformis threading apparatus of the present invention is made up of penetration pipe 2, the conical funnel of penetration pipe 2 front end welding and tapered rod 1.
Tapered rod 1 activity cross-under is in penetration pipe 2, from the termination of the steel wire rope 4 on hoist engine 5 through the welding of penetration pipe 2 front end
Link together with the self-locking drag hook of setting on the little head end of tapered rod 1 after conical funnel mouth, uniform around tapered rod 1
Having by steel strand 6, the steel wire rope 4 on hoist engine 5 draws the conical funnel that tapered rod 1 welds to penetration pipe 2 front end and moves,
The surrounding of tapered rod 1 is evenly equipped with by steel strand 6 jam-packed, and along with the traction of hoist engine 5, fusiformis threading apparatus will be with being worn
Steel strand wires 6 are through prestressed box girder duct 3, thus complete the threading work of steel strand wires.
A length of 80 centimetres of the penetration pipe 2 of the fusiformis threading apparatus of the present embodiment, when the length of penetration pipe 2 is relatively long,
To relative with locking preferably by the constraint of steel strand 6, if but time the length of penetration pipe 2 is bigger, due to post-tensioned prestressing case
Beam duct 3 is curve, and fusiformis threading apparatus can increase and the probability of cell walls collision, is unfavorable for threading.The internal diameter of penetration pipe 2, should
Depending on the radical of prestress wire, when steel strand wires radical is 7-9 root, internal diameter is that 60mm is ideal, when being worn steel
When the radical of twisted wire 6 is 10-12 root, internal diameter be 80 millimeters ideal.Its internal diameter should pass through steel strand wires ideal in hoop
Arrangement state also combines certain lock test and determines, steel strand wires are played hoop and are locked position-limiting action by penetration pipe 2；Fusiformis threading
The front end of device is conical funnel, its a length of 40 millimeters, is welded as a whole with the penetration pipe 2 of rear end, and wall thickness is 3 millimeters, circle
A diameter of 20 millimeters of the front opening of conical hopper, the termination for the steel wire rope 4 on hoist engine passes.The work of conical funnel
By the collision friction drag effect for reducing front end and prestressed box girder duct 3, it is ensured that threading work is the quickest.This reality
Execute tapered rod 1 in example a length of 100 millimeters, a diameter of 30 millimeters of its big end, a diameter of 10 millimeters of small end, and at it
Small end is provided with self-locking lifting hook device, it is ensured that be reliably connected with steel wire rope of windlass during work.Tapered rod 1 is placed in by steel strand
In the middle of 6, the little cephalic par of tapered rod 1 is concordant with by the wire harness end of steel strand 6.When fusiformis threading apparatus is by steel wire rope of windlass
During traction, tapered rod 1 has forward a certain amount of displacement, to being formed bigger squeezing action by steel strand 6 on its sidewall, leans on
This squeezing action, it is ensured that penetration pipe 2, formed by steel strand 6 and tapered rod 1 and stablize an entirety, and after passing through
Tension prestress box beam duct 3, completes threading operation.
Owing to steel wire rope 4 has the biggest flexibility, in order to steel wire rope 4 is previously threaded through prestressed box girder duct 3,
The present invention uses straight reinforcing bar, and the termination arranging a crotch and steel wire rope 4 in the rear end of straight reinforcing bar links together, by straight reinforcing bar from
One end, prestressed box girder duct 3 penetrates, and passes from the other end, and steel wire rope 4 band is crossed whole prestressed box girder duct 3
After be connected with fusiformis threading apparatus again, solve steel wire rope 4 and be difficult to the problem through prestressed box girder duct 3.Described fusiformis
The manufacture method of threading apparatus is as follows: described fusiformis threading apparatus use the seamless steel pipe of 2 millimeters as rear end body i.e. penetration pipe 2,
The conical funnel of penetration pipe 2 front end welding uses the bloom of respective diameters or rod iron lathe molding, after two parts are welded as
Overall；Described tapered rod 1 uses the rod iron lathe molding of respective diameters, post-treatment mounting hook.Treat to be compiled bundle by steel strand 6
After, by tapered rod 1 wrapped folder at the center by steel strand 6, when noting wrapped folder, the small end end face of tapered rod 1 with by steel strand 6
Section concordant, rear entirety penetrates in the penetration pipe 2 of fusiformis threading apparatus, and hand fit penetrates prestressed box girder duct to be worn
3；The termination of the steel wire rope 4 on hoist engine 5 is linked up with and links together with the self-locking drag hook of setting on the little head end of tapered rod 1.
Hoist engine slow start, hand fit sends into prestressed box girder duct 3 to be worn, and rear hoist engine continuous firing, finally by steel
Strand bundle pulls out from prestressed box girder duct 3 other end.
Claims (2)
1. a threader for prestressed box girder steel strand wires, including hoist engine (5), prestressed box girder duct (3),
Penetration pipe (2), tapered rod (1) and by steel strand (6), be provided with steel wire rope (4) on hoist engine (5), it is characterised in that
One end of penetration pipe (2) is fixedly welded with conical funnel, is provided with self-locking drag hook, taper on the little head end of tapered rod (1)
Rod (1) is movably arranged in penetration pipe (2), and the little head end of tapered rod (1) fixes, with one end of penetration pipe (2), the cone welded
Funnel in the same direction, is evenly equipped with by steel strand (6), steel wire rope between the medial wall of tapered rod (1) and penetration pipe (2)
(4) sequentially pass through after prestressed box girder duct (3) and conical funnel with the self-locking that arranges on the little head end of tapered rod (1)
Drag hook links together.
The threader of a kind of prestressed box girder steel strand wires the most according to claim 1, it is characterised in that penetration pipe
(2) a length of 40-50 millimeter of the conical funnel of welding is fixed in one end, and the top diameter of tapered rod (1) is less than cone
Lural diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620531035.2U CN205818148U (en) | 2016-06-04 | 2016-06-04 | The threader of prestressed box girder steel strand wires |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620531035.2U CN205818148U (en) | 2016-06-04 | 2016-06-04 | The threader of prestressed box girder steel strand wires |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205818148U true CN205818148U (en) | 2016-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620531035.2U Active CN205818148U (en) | 2016-06-04 | 2016-06-04 | The threader of prestressed box girder steel strand wires |
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| CN (1) | CN205818148U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105881736A (en) * | 2016-06-04 | 2016-08-24 | 中铁十九局集团第五工程有限公司 | Post-tensioned prestressed box girder steel strand threading device and threading method thereof |
-
2016
- 2016-06-04 CN CN201620531035.2U patent/CN205818148U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105881736A (en) * | 2016-06-04 | 2016-08-24 | 中铁十九局集团第五工程有限公司 | Post-tensioned prestressed box girder steel strand threading device and threading method thereof |
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| GR01 | Patent grant |