Helical compression spring based break test buffer device for steel wire rope tensile testing machine

Abstract

The invention provides a helical compression spring based break test buffer device for a steel wire rope tensile testing machine. The device mainly structurally comprises a front top beam, sensors, a force application seat, a guiding and locating plate, screws, guide screws, a left press plate, a spring, a force application bulb, a right press plate, a protective cover and a hydraulic cylinder, wherein the sensors are fixed on the front top beam through inner hexagon screws, the force application bulb and the force application seat are connected with a piston rod of the hydraulic cylinder and the sensors through thread structures respectively, the left press plate and the right press plate are nested on the force application bulb and the piston rod of the hydraulic cylinder respectively, the force application bulb and the force application seat are connected together through six uniformly distributed guide screws, the left press plate and the right press plate, the spring is nested on the piston rod of the hydraulic cylinder and located between the left press plate and the right press plate, the guiding and locating plate is welded on the front top beam, and the protective cover is embedded in the guiding and locating plate and clamped through the screws. When a steel wire rope suddenly breaks off during a tensile test, the spring can reduce the tensile applied by the front top beam under instant impact to the guide screws, and the guide screws are prevented from being snapped off.

Description

technical field [0001] The invention relates to a device for a tensile testing machine, in particular to a buffering device for a breaking test of a steel wire rope tensile testing machine based on a helical compression spring. Background technique [0002] Steel wire ropes are mainly used in lifting, traction and other occasions, and the working conditions are relatively harsh. During use, friction and wear, fatigue damage, local broken wires and deformation will occur, which reduces the tensile strength of the steel wire rope. In order to ensure the reliability of the steel wire rope for repeated use, it is necessary to carry out a tension test in accordance with the relevant national standards. In the tensile test, when the tensile force of the steel wire rope is greater than its own tensile strength and suddenly breaks, the piston rod of the hydraulic cylinder of the tensile testing machine will instantly impact the front top beam under the action of hydraulic oil, causi...

AI Technical Summary

Problems solved by technology

In the tensile test, when the tensile force of the steel wire rope is greater than its own tensile strength and suddenly breaks, the piston rod of the hydraulic cylinder of the tensile testing machine will instantly impact the front top beam under the action of hydraulic oil, causing the guide screw at the connection between the force ball head and the force seat The instantaneous tension is too large and it breaks, which makes the tensile testing machine unable to work normally.

[0003] The working environment of the testing machine is relatively harsh, and the long-term exposure of the force ball head, force seat, and guide screws will cause sand and dust to adhere to it, which will affect its working performance.

Images