CN212684300U

CN212684300U - Longitudinal prestress tensioning device of railway continuous beam

Info

Publication number: CN212684300U
Application number: CN202020811606.4U
Authority: CN
Inventors: 蔡爵仲; 吕余; 李扬; 刘波
Original assignee: Fourth Engineering Co Ltd of China Railway No 5 Engineering Group Co Ltd
Current assignee: Fourth Engineering Co Ltd of China Railway No 5 Engineering Group Co Ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2021-03-12
Anticipated expiration: 2030-05-15

Abstract

The utility model discloses a longitudinal prestress tensioning device of railway continuous beam, including the jack-draw, the left end surface of jack-draw is provided with the flexible section of thick bamboo of muscle network, the left end surface of the flexible section of thick bamboo of muscle network is provided with the annular rib body No. one, the left end of the annular rib body is provided with the annular rib body No. two, the left end of the annular rib body No. two is provided with stings first of muscle vertebra, the left end surface intermediate position that stings first of muscle vertebra is provided with prestressed reinforcement, the both ends surface all has set firmly the rail stabilizer blade about the jack-draw, the lower extreme surface of rail stabilizer blade has set firmly the rail extension board, the right-hand member surface of jack-draw is provided with out the muscle section of thick bamboo. This tensioning device can avoid taking place the slippage among the tensioning process, snatchs prestressing steel's firm, carries out the position to prestressing steel and prescribes a limit to, avoids the tensioning process in acutely rocking, ensures user's life safety, realizes going on prestressing steel stretch-draw processing in succession for production speed shortens process time.

Description

Longitudinal prestress tensioning device of railway continuous beam

Technical Field

The utility model relates to a continuous beam stretch-draw technical field specifically is a longitudinal prestress tensioning equipment of railway continuous beam.

Background

The railway bridge is a structure built by railway crossing rivers, lakes, straits, valleys or other obstacles and realizing the three-dimensional crossing of railway lines and railway lines or roads; the branch of the railway engineering subject is the railway bridge engineering for short, so the branch also comprises a series of technologies of railway bridge construction and maintenance; railway bridges are divided into railway bridges and highway and railway dual-purpose bridges according to purposes, and a longitudinal prestress tensioning device of a railway continuous beam is required nowadays to improve the efficiency of the construction progress of the railway bridges;

the phenomenon of prestressed reinforcement slippage is easily generated by tensioning devices in the market, the prestressed reinforcement is not firmly grabbed enough, the position of the prestressed reinforcement cannot be limited, the prestressed reinforcement shakes abnormally during tensioning, a user is easy to hurt in the operation process, and the prestressed reinforcement tensioning can not be continuously performed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a vertical prestressing force tensioning equipment of continuous beam of railway to the phenomenon of prestressing steel slippage is most easily taken place to the tensioning equipment on the market that proposes in solving above-mentioned background art, and is firm inadequately to snatching of prestressing steel, can not prescribe a limit to prestressing steel position, and the prestressing steel appears rocking abnormal phenomenon during the stretch-draw, and is easily injured in the user operation process, to the unable continuous problem that goes on of prestressing steel stretch-draw processing.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a longitudinal prestress tensioning device of railway continuous beam, includes the tensioning jack, the left end surface of tensioning jack is provided with a muscle net expansion cylinder, the left end surface of muscle net expansion cylinder is provided with the annular rib body No. one, the left end of the annular rib body is provided with the annular rib body No. two, the left end of the annular rib body No. two is provided with stings first of muscle vertebra, the left end surface intermediate position of stinging first of muscle vertebra is provided with the prestressing steel, the right-hand member surface intermediate position of stinging first of muscle vertebra has set firmly the fixed block, the right-hand member surface intermediate position of fixed block is connected with telescopic link one, the right-hand member surface of telescopic link one is connected with telescopic link two, the right-hand member surface of the annular rib body No. two is close to the intermediate position and is provided with the inscription pull rod, the left end of telescopic link one is provided with stings first of muscle vertebra, one side of stings first of muscle vertebra head two, wherein the first 8 of the vertebra of stinging, sting the vertebra two 14 and sting the section shape of the vertebra three 15 of muscle all is the arc type, the surface cover of inscription pull rod is equipped with exterior sleeve spring one, the upper end surface of a ring muscle body has been close to the intermediate position and has been seted up tensile slotted hole, the lacing wire cylinder hole has been seted up to the upper end surface intermediate position of a ring muscle body, the upper end surface intermediate position of stinging the vertebra first has seted up and has been occluded the groove, the surface cover of telescopic link two is equipped with exterior sleeve spring two, the right-hand member of exterior sleeve spring two sets firmly relevant antithetical couplet piece.

Preferably, the surfaces of the left end and the right end of the tensioning jack are fixedly provided with rail support legs, the surface of the lower end of each rail support leg is fixedly provided with a rail support plate, and the surface of the right end of the tensioning jack is provided with a rib outlet barrel.

Preferably, the prestressed steel bars are matched with the tensioning jack through the first steel-biting vertebra and the flexible cylinder of the tendon network and are arranged in a penetrating mode.

Preferably, the first tendon-biting vertebra, the second tendon-biting vertebra and the third tendon-biting vertebra form a vertebra occlusion structure together, and the second telescopic rod, the internally connected pull rod and the second outer sleeve spring form a tensioning rebound structure together.

Preferably, the prestressed reinforcement is fixedly clamped with the first annular reinforcement body through the cooperation of the vertebral head occlusion structure and the tensioning resilience structure, and the second annular reinforcement body is arranged in parallel with the first annular reinforcement body through the internally-connected pull rod.

Preferably, the second telescopic rod penetrates through the association block to be connected with the inner connection pull rod, and the first biting vertebra head is matched with the association block through the second outer sleeve spring to be in sliding connection with the second telescopic rod.

Compared with the prior art, the beneficial effects of the utility model are that: the tensioning device is provided with a first tendon-biting vertebra head, the formed vertebra head meshing structure is tightly meshed with prestressed reinforcements through cooperation of a second tendon-biting vertebra head and a third tendon-biting vertebra head, slipping can be avoided in the tensioning process, stable grabbing of the prestressed reinforcements is ensured, the tensioning rebounding structure formed by the second telescopic rod, the second internal connecting pull rod and the second outer sleeve spring is matched, the prestressed reinforcements are gradually conveyed rightwards through a tensioning jack, the internal connecting pull rod is retracted, the vertebra head meshing structure is slowly contracted to be meshed and fixed with the prestressed reinforcements, the prestressed reinforcements are limited in position through the tensioning rebounding structure, severe shaking in the tensioning process is avoided, and life safety of a user is ensured;

this tensioning equipment is provided with overcoat spring one and overcoat spring two, after stretch-draw processing, through release inscription pull rod, at first by the resilience force effect of overcoat spring one, restore the stretch-draw resilience structure to initial tension state fast, then by the resilience force effect cooperation of overcoat spring two, make vertebra head interlock structure resume rapidly to opening the state, can take out the prestressing steel that stretch-draw was accomplished fast this moment, also make preparation for the stretch-draw work of next batch prestressing steel, from this realize going on in succession prestressing steel stretch-draw processing, accelerate the production rate, shorten process time, for the user provides convenience, realize its continuous stretch-draw function.

Drawings

Fig. 1 is a schematic view of a partial structure of the present invention;

fig. 2 is a top view of the present invention;

FIG. 3 is a schematic structural view of a first outer sleeve spring and a tension slot of the present invention;

fig. 4 is a schematic structural view of the second outer sleeve spring and the associated block of the present invention.

In the figure: 1. tensioning a jack; 2. a rail foot; 3. a rail support plate; 4. discharging a rib cylinder; 5. a tendon and collateral expansion cylinder; 6. a first annular rib body; 7. a second annular rib body; 8. biting the first vertebra; 9. pre-stressing the steel bars; 10. A fixed block; 11. a first telescopic rod; 12. a second telescopic rod; 13. an internal connecting pull rod; 14. biting the tendon and the vertebral head II; 15. Biting the tendon and the vertebral head; 16. a first outer sleeve spring; 17. stretching the slotted hole; 18. a lacing cylinder hole; 19. an occlusion groove; 20. a second outer sleeve spring; 21. an association block.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: a longitudinal prestress tensioning device of a railway continuous beam comprises a tensioning jack 1, wherein a tendon extension cylinder 5 is arranged on the left end surface of the tensioning jack 1, a first annular rib body 6 is arranged on the left end surface of the tendon extension cylinder 5, a second annular rib body 7 is arranged on the left end of the first annular rib body 6, rail support legs 2 are fixedly arranged on the left end surface and the right end surface of the tensioning jack 1, rail support plates 3 are fixedly arranged on the lower end surfaces of the rail support legs 2, a rib outlet cylinder 4 is arranged on the right end surface of the tensioning jack 1, the second annular rib body 7 is arranged in parallel with the first annular rib body 6 through an internal connecting pull rod 13, and the tendon extension cylinder 5 is matched with the first annular rib body 6 to prevent waste residues from splashing to injure workers by mistake in the tensioning process of prestressed reinforcements 9;

the left end of the second round rib body 7 is provided with a first interlocking vertebra head 8, the middle position of the left end surface of the first interlocking vertebra head 8 is provided with a prestressed steel bar 9, the middle position of the right end surface of the first interlocking vertebra head 8 is fixedly provided with a fixed block 10, the middle position of the right end surface of the fixed block 10 is connected with a first telescopic rod 11, the right end surface of the first telescopic rod 11 is connected with a second telescopic rod 12, the right end surface of the second round rib body 7 is provided with an inner connecting pull rod 13 close to the middle position, the left end of the first telescopic rod 11 is provided with a second interlocking vertebra head 14, the prestressed steel bar 9 is matched with the tendon network expansion cylinder 5 through the first interlocking vertebra head 8 and is penetrated through the tensioning jack 1, the first interlocking vertebra head 8, the second interlocking vertebra head 14 and the third interlocking vertebra head 15 jointly form a vertebra head interlocking structure, the second telescopic rod 12, the inner connecting pull rod 13 and the second outer sleeve spring 20 jointly form a tensioning resilience structure, the prestressed steel bar 9 is fixedly installed with the first round rib body, the second telescopic rod 12 penetrates through the association block 21 to be connected with the inner connection pull rod 13, the first interlocking vertebra head 8 is in sliding connection with the second telescopic rod 12 through the matching of the second outer sleeve spring 20 and the association block 21, and the second annular reinforcement body 7 is used for pre-positioning the position of the prestressed reinforcement 9, so that the prestressed reinforcement 9 is prevented from being suddenly broken during initial tensioning;

sting muscle first 8, sting muscle first 14 and sting muscle first three 15 cross-sectional shape of muscle first 15 and all being the arc type, the surface cover of inscription pull rod 13 is equipped with overcoat spring first 16, tensile slotted hole 17 has been seted up near the intermediate position to the upper end surface of a ring muscle body 6, lacing wire tube hole 18 has been seted up to the upper end surface intermediate position of a ring muscle body 6, bite the upper end surface intermediate position of muscle first 8 and seted up interlock groove 19, the surface cover of telescopic link second 12 is equipped with overcoat spring second 20, the right-hand member of overcoat spring second 20 sets firmly relevant antithetical couplet piece 21, cooperation by the resilience power of overcoat spring second 20, make the muscle first interlock structure resume to open state rapidly, can take out the prestressing tendons 9 that stretch-draw was accomplished this moment fast.

The working principle is as follows: for the tensioning device, firstly, a first tendon-biting vertebra head 8 is arranged through the tensioning device, a second tendon-biting vertebra head 14 and a third tendon-biting vertebra head 15 are matched together, a formed vertebra head meshing structure tightly meshes with the prestressed steel bars 9, slipping in the tensioning process can be avoided, stable grabbing of the prestressed steel bars 9 is ensured, a tensioning resilience structure formed by a second telescopic rod 12, an internally-connected pull rod 13 and a second outer sleeve spring 20 is matched, the prestressed steel bars 9 are gradually conveyed rightwards by a tensioning jack 1, the internally-connected pull rod 13 is inwards retracted, the slowly-contracted vertebra head meshing structure meshes and fixes the prestressed steel bars 9, the tensioning position of the prestressed steel bars 9 is limited by the tensioning resilience structure, severe shaking in the tensioning process is avoided, and life safety of a user is ensured; then, the tensioning jack 1 is effectively supported at the upper end of a railway track through the matching of a rail support leg 2 and a rail support plate 3, so that the prestressed steel bar 9 is conveniently tensioned during construction, the position of the prestressed steel bar 9 which is tensioned is limited by a bar outlet cylinder 4, unified collection and placement are realized, a bar network expansion cylinder 5 is matched with a first annular bar body 6, waste residues are prevented from splashing in the tensioning process of the prestressed steel bar 9, workers are prevented from being accidentally injured, the safety of the machining process is improved, the prestressed steel bar 9 is subjected to position pre-positioning by a second annular bar body 7, sudden collapse of the prestressed steel bar 9 during initial tensioning is avoided, a first telescopic rod 11 is fixedly connected with a first engaged bar cone 8 through a fixing block 10 and is slidably mounted with a second telescopic rod 12, the functions of stretching and rebounding are realized, a sliding track is provided for an inner connecting pull rod 13 by a stretching 17, the position of the prestressed steel bar 9 is limited by a pull cylinder hole, the engagement groove 19 enables the first engaged vertebra 8 and the prestressed reinforcement 9 to be engaged more tightly, so that slipping is avoided, and the right end of the second outer sleeve spring 20 and the second annular reinforcement 7 are fixed by the association block 21; at last, be provided with overcoat spring one 16 and overcoat spring two 20 through this tensioning equipment, after stretch-draw processing, through release inscription pull rod 13, at first by the resilience effect of overcoat spring one 16, restore stretch-draw resilience structure to initial tension state fast, then by the cooperation of the resilience effect of overcoat spring two 20, make vertebra head interlock structure resume to open the state fast, can take out the prestressing steel 9 that stretch-draw was accomplished fast this moment, also prepare for the stretch-draw work of next batch prestressing steel 9, from this the realization is gone on in succession to prestressing steel 9 stretch-draw processing, accelerate production speed, shorten process time, it is convenient for the user to provide, realize its continuous stretch-draw function.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a longitudinal prestress tensioning equipment of railway continuous beam, includes tensioning jack (1), its characterized in that: the left end surface of the tensioning jack (1) is provided with a tendon expansion cylinder (5), the left end surface of the tendon expansion cylinder (5) is provided with a tendon body (6), the left end of the tendon body (6) is provided with a tendon body (7), the left end of the tendon body (7) is provided with a tendon biting head (8), the middle position of the left end surface of the tendon biting head (8) is provided with a prestressed steel bar (9), the middle position of the right end surface of the tendon biting head (8) is fixedly provided with a fixed block (10), the middle position of the right end surface of the fixed block (10) is connected with a first telescopic rod (11), the right end surface of the first telescopic rod (11) is connected with a second telescopic rod (12), the middle position of the right end surface of the second tendon body (7) is provided with an inner connecting pull rod (13), the left end of the first telescopic rod (11) is provided with a second tendon head (14), sting one side of muscle vertebra first (14) and being provided with and sting muscle vertebra first three (15), wherein sting muscle vertebra first (8), sting muscle vertebra first (14) and sting the cross sectional shape of muscle vertebra first three (15) and all be the arc type, the surface cover of inscription pull rod (13) is equipped with overcoat spring one (16), the upper end surface of a ring muscle body (6) is close to the intermediate position and has seted up tensile slotted hole (17), lacing wire barrel hole (18) have been seted up to the upper end surface intermediate position of a ring muscle body (6), the upper end surface intermediate position of stinging muscle vertebra first (8) has seted up and has held in the same place groove (19), the surface cover of telescopic link second (12) is equipped with overcoat spring two (20), the right-hand member of overcoat spring two (20) sets firmly relevant antithetical couplet piece (21).

2. The longitudinally prestressed tension apparatus for continuous railway girder according to claim 1, wherein: the tensioning jack is characterized in that rail support legs (2) are fixedly arranged on the surfaces of the left end and the right end of the tensioning jack (1), a rail support plate (3) is fixedly arranged on the surface of the lower end of each rail support leg (2), and a rib outlet cylinder (4) is arranged on the surface of the right end of the tensioning jack (1).

3. The longitudinally prestressed tension apparatus for continuous railway girder according to claim 1, wherein: the prestressed reinforcement (9) is matched with the tensioning jack (1) through the first biting vertebra (8) and the tendon flexible cylinder (5) to run through the tensioning jack.

4. The longitudinally prestressed tension apparatus for continuous railway girder according to claim 1, wherein: sting first (8) of muscle vertebra, sting second (14) of muscle vertebra and sting third (15) of muscle vertebra and constitute vertebra head interlock structure jointly, telescopic link two (12), inscription pull rod (13) and outer spring two (20) constitute the stretch-draw resilience structure jointly.

5. The longitudinally prestressed tension apparatus for continuous railway girder according to claim 1, wherein: prestressing tendons (9) are through vertebra head interlock structure and stretch-draw resilience structure cooperation and the solid installation of a ring muscle body (6) card, and No. two ring muscle bodies (7) are through inscription pull rod (13) and ring muscle body (6) parallel arrangement.

6. The longitudinally prestressed tension apparatus for continuous railway girder according to claim 1, wherein: the second telescopic rod (12) penetrates through the association block (21) to be connected with the inner connecting pull rod (13), and the first vertebra biting head (8) is matched with the second telescopic rod (12) through the second outer sleeve spring (20) and the association block (21) to be in sliding connection.