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Tension holding structure of prefabricated track plate prestressed tendon

A technology of prestressed bars and track slabs, applied in the field of rail transit, can solve the problems of prestressed loss of prestressed steel bars, substandard track slabs, affecting track slab performance, etc., and achieves the effect of ensuring qualified tension and overcoming prestress loss.

Pending Publication Date: 2019-01-25
四川升腾元创机电技术研究有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art that the unit flow method existing in the production of the anchor plate is not inserted in place, which will cause the prestressed stress loss of the prestressed steel bar after tension, affect the performance of the track slab, and cause the track slab to fail to meet the standard. Provides a tension-holding structure for prestressed tendons of prefabricated track slabs

Method used

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  • Tension holding structure of prefabricated track plate prestressed tendon
  • Tension holding structure of prefabricated track plate prestressed tendon
  • Tension holding structure of prefabricated track plate prestressed tendon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] like Figure 3-6 , 8, a kind of prefabricated track slab prestressed tendon tension holding structure according to the present invention includes the second friction wheel 4, the first friction wheel 5, the first driving part 6, the second driving part, the connecting seat 7. Guide rails 8, bases, elastic components 9, and tension rods 2 connected to both ends of the prestressed reinforcement.

[0053] The tension rod 2 is provided with an externally threaded section 21, and the second friction wheel 4 is provided with an internally threaded hole in the axial center, and the internally threaded hole is adapted to the externally threaded section 21. The first driving part 6 Connect the first friction wheel 5, the connecting seat 7 is slidably connected to the guide rail 8, the connecting seat 7 is connected to the elastic member 9, the elastic member 9 is connected to the base, and the base is connected to The first drive part 6, the elastic force direction provided by ...

Embodiment 2

[0059] like Figure 3-5 , Shown in 7-8, a kind of prefabricated track slab prestressed tendon tension holding structure according to the present invention comprises the second friction wheel 4, the first friction wheel 5, the first driving part 6, the second driving part, The connecting seat 7, the guide rail 8, the base, the elastic member 9, and the tension rod 2 connected to the two ends of the prestressed steel bar are different from Embodiment 1 in that the guide rail 8 is provided with a boss 81, and the connection The seat 7 is located above the boss 81 , the elastic member 9 is sheathed on the guide rail 8 and is located between the connecting seat 7 and the boss 81 , and the elastic member 9 is a spring.

[0060] The diameter of the boss 81 is larger than the outer diameter of the spring, so as to prevent the spring (especially under force) from falling through the boss 81, and the second driving part drives the connecting seat 7 Moving downward along the guide rail ...

Embodiment 3

[0063] The tension and retention structure of prestressed tendons of a prefabricated track slab according to the present invention is different from Embodiment 1 in that the second friction wheel 4 and the first friction wheel 5 in Embodiment 1 are respectively Replaced by the second gear 41 and the first gear 51 .

[0064] The body of the tension rod 2 is provided with an externally threaded section 21, and the second gear 41 is provided with an internally threaded hole in the axial center, the internally threaded hole is adapted to the externally threaded section 21, and the connecting seat 7 is slidably connected to the The guide rail 8, the connecting seat 7 is connected to the elastic member 9, the elastic member 9 is connected to the base, the base is connected to the first driving part 6, and the first driving part 6 is connected to the The first gear 51, the first driving part 6 is used to drive the first gear 51 to rotate, and the second driving part is used to drive ...

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Abstract

The invention discloses a tension holding structure of a prefabricated track plate prestressed tendon. The tension holding structure includes a first gear, a second gear, a first driving component, asecond driving component, a connecting seat, a guide rail, an elastic component, and tension rods connected to the two ends of the prestressed tendon. By application of the tension holding structure of the prefabricated track plate prestressed tendon, after a prestressed steel bar is tensioned, when the elastic component fits the periphery of the second gear on the periphery of the first gear, pressure is provided for the first gear, ensuring that after the first gear rotates, gear teeth of the first gear can be meshed with a toothed groove of the second gear, the first driving component drives the first gear to rotate, the first gear rotates to drive the second gear to rotate, the second gear axially moves along the tension rods while rotating, and draws close to and is attached to the track plate die wall, a tension state of the prestressed steel bar is retained continuously by using a fastening and self-locking function of threaded connections, the prestressed loss that may be caused by an existing anchor plate mode is overcome, and it is ensured that the track plate tensioning is qualified.

Description

technical field [0001] The invention relates to the technical field of rail transit, in particular to a tension-holding structure for prestressed tendons of prefabricated rail slabs. Background technique [0002] In the past, in the production process of high-speed rail track slabs, whether it is pre-tensioning or post-tensioning, artificial single-stretched prestressed steel bars are used, such as figure 1 As shown, the two ends of several prestressed steel bars arranged in the track slab mold 1 are connected to the tension rods 2 respectively, and the tension rods 2 extend outside the wall of the track slab mold 1. In this way, all the prestressed steel bars on the track slab mold 1 are tensioned. The degree of pull is different, which will affect the performance of the track slab and even lead to the scrapping of the track slab; in order to overcome the above problems and improve the automation level of the track slab production, the production line of the track slab unit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B23/04
CPCB28B23/043
Inventor 娄景辉吴元文税卓平崔进福董合绵
Owner 四川升腾元创机电技术研究有限公司
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