Steel strand outer wire tensioning device and inner and outer wire limit friction measuring device and method
A tensioning device and a technology for steel strands, applied in the field of detection, can solve the problems of difficulty in observing the change of the outer wire, inconvenient installation of the outer wire, etc., and achieve the effects of small occupied space, convenient installation, and reliable separation and anchoring.
Active Publication Date: 2021-11-19
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
[0006] The outer wire between the two loose anchor devices is blocked by the oil cylinder, it is inconvenient to install related instruments for data acquisition on the outer wire, and it is also difficult to observe the change of the outer wire during the tensioning process
Method used
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Embodiment Construction
[0043] The present invention will be described in further detail below.
[0044] Such as Figure 1-Figure 4 As shown, the steel strand outer wire tensioning device is applied to a steel strand 5 provided with an inner wire 52 and a plurality of outer wires 51, including a frame 4, a first anchor loosening device 11, a second anchor loosening device 12, The connecting device and the first driving device, the steel strand 5 is passed through the first anchor loosening device 11 and the second anchor loosening device 12 in sequence, and the first anchor loosening device 11 separates the outer wire 51 and the inner wire 52 at one end of the steel strand 5 And anchor the outer wire 51, the second loose anchor device 12 separates the outer wire 51 and the inner wire 52 at the other end of the steel strand 5 and anchors the outer wire 51, the first loose anchor device 11 and the first driving device are respectively located at the second loose anchor device 11 and the inner wire 52. ...
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The invention relates to a tensioning device for the outer wire of a steel strand, comprising a frame, a first anchor loosening device, a second anchor loosening device, a connecting device and a first driving device, the first anchor loosening device and the second anchor loosening device are separated and anchored The outer wire and the inner wire at both ends of the steel strand, the first anchor loosening device and the first driving device are respectively arranged on both sides of the second anchor loosening device, the first anchor loosening device is connected to the frame, and the second anchor loosening device is slidably connected to the The frame, the fixed part of the first driving device is fixed to the frame, the movable part of the first driving device is connected to one end of the connecting device, the other end of the connecting device is connected to the second anchor loosening device, the first anchor loosening device and the second loose anchor The outer wire of the steel strand between the anchor devices is connected with a data acquisition instrument. It provides the necessary operating space for installing the data acquisition instrument on the surface of the outer wire of the steel strand to collect data and measurement work, and provides the necessary observation space for the change of the outer wire during the experiment. The invention also relates to a device and a method for measuring the limit friction force of the inner and outer wires of the steel strand.
Description
technical field [0001] The invention relates to the technical field of detection, in particular to a tensioning device for steel strand outer wires and a device and method for measuring limit friction force of inner and outer wires. Background technique [0002] Steel strand is a stranded steel cable composed of high-strength steel wires, suitable for bridge cables, prestressed concrete or similar purposes, and is widely used in construction fields such as road bridges and other fields such as machinery industry. [0003] The steel strand includes an inner wire and a plurality of outer wires wound on the inner wire. The outer wire of the steel strand has a helically twisted spatial form. After being pulled, it will form a radial force on the inner wire, which will cause complex mechanical behaviors such as contact, friction, and slip between the wires of the steel strand, which will lead to its Mechanical damage such as frequent wear, fatigue, and fracture occurs during use...
Claims
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IPC IPC(8): G01L1/04
CPCG01L1/04
Inventor 赵勇霖郭俊标甄晓霞张卓杰王荣辉李明阳李浚东
Owner SOUTH CHINA UNIV OF TECH