Tension system

Abstract

The invention provides a tension system which comprises tension equipment, a hydraulic device and a computer, wherein the tension equipment comprises a jack as well as a pressure sensor and a displacement detection device which are arranged inside the cylinder of the jack; the hydraulic device is communicated with tension equipment fluid and comprises an oil pump unit and a controller; the controller controls the oil pump unit according to a received signal from the computer to drive the jack to execute tension operation; and moreover, the controller transmits information acquired by the pressure sensor and the displacement detection device to the computer for processing. The tension system is easy to operate, simple and compact in structure, low in cost, high in reliability and high in precision and is provided with automatic programs.

Description

technical field [0001] The invention relates to the field of civil engineering construction equipment, in particular to a prestressed tensioning system. Background technique [0002] The prior art mainly includes prestressed tensioning equipment and its control components. The control component includes a tensioning opening and closing control unit and an acquisition control unit for collecting various data during the tensioning operation. The tensioning equipment includes a driving pump, a motor, a driving control mechanism, an oil tank, and an oil cylinder device. A pressure sensor for measuring the oil pressure value is installed in the oil tank; a displacement detection device for measuring the displacement value of the oil cylinder piston is installed on the tensioning cylinder device; an electromagnetic control valve for controlling the hydraulic oil in and out is installed in the oil tank; data is installed on the oil tank The acquisition control unit is connected wi...

AI Technical Summary

Problems solved by technology

[0004] (1) Sensor problem. The pressure sensor is located in the oil tank and directly measures the oil inlet pressure of the oil pump unit. The measured value is not the oil pressure value of the jack, so the pressure value cannot accurately reflect the tension

The displacement detection device is installed on the shell of the jack, which is greatly affected by the environment. The measured value will be inaccurate after the sensor is damp, and the process of handling and replacing the jack will easily cause damage to the displacement detection device and affect the operation.

[0005] (2) In terms of tension control, in the prior art tension hydraulic devices, the oil inlet speed of the motor and oil pump is constant, resulting in a constant loading speed, the tension force cannot be adjusted in real time, and it is easy to cause the tension force to be applied too quickly

The load-holding state is unstable, and automatic supplementary tensioning cannot be performed, which may cause different tension forces at both ends when both ends are stretched synchronously, making it difficult to achieve true tension synchronization

[0006] (3) The speed of the motor used in the motor of the oil pump unit cannot be adjusted, resulting in the non-adjustable oil feeding speed and tensioning speed, and the opening of the small tonnage jack is too fast, and the large tonnage jack is too slow, which affects the tensioning efficiency; at the same time, the tensioning force accuracy The impact is relatively large, especially on the tension accuracy of the negative bending moment;

[0008] (5) Ordinary laptops are used. Due to the poor environment of the construction site, the sunlight visibility, battery life, adaptability to temperature, dustproof, waterproof, shockproof, etc. are relatively poor, which makes the laptop prone to failure and affects the work.

Images