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A multi-point independent displacement detection device for steel strand clips used in the reverse pull method

A displacement detection and steel strand technology, applied in measuring devices, using stable tension/pressure to test material strength, instruments, etc., can solve problems such as on-site accidents, unrestricted clips, steel strand damage, etc. The effect of preventing turbulence, increasing usability, and increasing service life

Active Publication Date: 2020-11-24
四川升拓检测技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to provide a multi-point independent displacement detection device for steel strand clips used in the reverse pull method, so as to solve the problem that the clamps are not restricted during the existing reverse pull method test, resulting in over tension, so that Strand Damage and Field Accidents

Method used

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  • A multi-point independent displacement detection device for steel strand clips used in the reverse pull method
  • A multi-point independent displacement detection device for steel strand clips used in the reverse pull method
  • A multi-point independent displacement detection device for steel strand clips used in the reverse pull method

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Embodiment

[0034] Please refer to figure 2 and image 3 , a multi-point independent displacement detection device for steel strand clips used in the reverse pull method, including: a limit cylinder 130, a tension jack 140 and a host controller, the clip 120 to be tested is fixed in the anchorage 110, and the limit One end of the barrel 130 faces the clip 120 , and the other end of the limiting barrel 130 is connected with the tension jack 140 . The steel strand 160 is sequentially connected to the anchorage 110, the clip 120, the limit cylinder 130 and the tension jack 140, the steel strand 160 is fixedly connected to the anchor 110, the clip 120 and the tension jack 140, and the steel strand 160 runs through There is a gap between the limiting cylinder 130 and the inner wall of the limiting cylinder 130 . The host controller communicates with the displacement sensor 150 and the tension jack 140 respectively, and the tension jack 140 is started and stopped by the host controller.

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Abstract

The invention discloses a multi-point independent displacement detecting device for a steel strand clip for a reverse pulling method and belongs to the technical field of quality safety detection of civil engineering. The multi-point independent displacement detecting device for the steel strand clip for the reverse pulling method comprises a limiting cylinder, a tensioning jack and a host controller; a protective head cover is arranged at one end of the limiting cylinder and the other end tis connected with the tensioning jack; the protective head cover is provided with a limiting cavity, andthe limiting cavity and the clip are arranged oppositely; a displacement sensor is arranged on the side wall of the limiting cylinder; the probe of the displacement sensor orderly penetrates throughthe middle cavity of the limiting cylinder and the limiting cavity and contacts with the clip; and the host controller is respectively in communication connection with the displacement sensor and thetensioning jack. The multi-point independent displacement detecting device for a steel strand clip for a reverse pulling method in the invention monitors the displacement of the clip in real time through the displacement sensor; when the force value of the tensioning jack reaches a set value, the clip starts to break away from an anchorage device; the displacement sensor starts to read; and when the displacement pass by value reaches a preset value, the tensioning jack stops working so as to prevent over-tensioning effectively.

Description

technical field [0001] The invention relates to the technical field of civil engineering quality and safety detection, in particular to a multi-point independent displacement detection device for steel strand clips used in the reverse pull method. Background technique [0002] The size of the prestress in the prestressed concrete structure is the main index affecting the normal performance of the structure during the service period. At present, the detection methods commonly used at home and abroad are roughly divided into two categories: indirect detection and direct detection. Indirect detection technologies mainly include: acoustic emission technology, electromagnetic effect detection technology, ultrasonic detection method, dynamic detection method and anchor end prestress test technology, and its test accuracy is relatively low. Direct detection technology mainly includes: direct detection technology of prestressed tendon, stress release method and reverse pull method. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08G01N3/06G01B21/02
CPCG01B21/02G01N3/06G01N3/08G01N2203/0017G01N2203/0682
Inventor 吴佳晔张亮高宇许自明张远军杨森何伟邓立
Owner 四川升拓检测技术股份有限公司
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