Expansion screw pull-out testing machine

Expansion screw pull-out testing machineProfessional anchoring detection equipment for building a strong engineering safety defense line

Product Introduction

Expansion screw pull-out testing machineIt is a professional testing instrument designed specifically for evaluating the tensile and anti slip performance of various types of post installed anchors such as expansion bolts, chemical anchor bolts, and anchor rods in concrete, masonry and other substrates. This equipment is crucial for ensuring the safety of anchoring connections in building curtain walls, heavy equipment, track facilities, and existing building renovations. It is widely used in key areas such as construction, engineering supervision, quality inspection, safety appraisal, and building materials production.

This equipment adopts a modular and high-strength design, mainly composed of a stable reaction force support system, high-precision hydraulic loading device, intelligent measurement and control unit, and a series of specialized adaptive fixtures. Its core value lies in the ability to accurately simulate the axial tension that anchor components bear in actual service in the laboratory or engineering site, and directly obtain key data such as ultimate tensile force and load displacement relationship curve through scientific measurement, and then make compliance judgments against safety standards. The entire testing process strictly follows national and industry core technical regulations such as JGJ 145 and GB/T 22795, providing quantitative basis for design review, construction acceptance, and safety evaluation of the project. It is a tool to ensure the quality and long-term safety of concealed engineering.

Overview of Working Principle

The operation of the equipment follows a rigorous mechanical testing process, which combines hydraulic loading with electronic measurement to accurately reproduce and measure the pull-out performance of anchor components. The entire process is mainly divided into three stages:

1. Test system setup and anchor installation

Firstly, based on the specifications and estimated load of the tested anchor bolt, select and firmly install a three-point support or door type reaction frame on the surface of the test substrate to form a solid loading reaction system. Subsequently, the expansion screws that have been installed and tightened according to regulations are connected to the core loading unit of the equipment - high-precision force sensor and hydraulic actuator cylinder - through a dedicated pull-out connector (such as an internal threaded sleeve or fixture), ensuring that all connecting components are coaxial and centered to eliminate the interference of eccentric loads on the test results.

2. Program controlled loading and real-time data acquisition

The operator pre-set parameters such as loading rate on the intelligent measurement and control instrument. After starting the equipment, the hydraulic system drives the oil cylinder to smoothly apply axial tension, which is transmitted to its expansion mechanism or adhesive through the anchor bolt and interacts with the base material. During this process, the force sensor monitors the pulling force value in real-time, while the displacement sensor synchronously and accurately measures the relative pull-out displacement of the anchor bolt. The measurement and control system continuously collects data at high speed and real-time draws and displays intuitive "tension displacement" curves.

3. Destruction determination and intelligent result analysis

The loading process continues until the anchor bolt is pulled out, the substrate cone is damaged, the screw yields, or the predetermined termination conditions are reached. The equipment automatically records the peak tensile force (ultimate load). Finally, the built-in analysis software automatically calculates relevant parameters based on the entire data, and intelligently judges whether the test results are qualified according to the selected criteria, generating a professional testing report containing complete test curves and key data with just one click.

Main technical parameters

The following table lists the core technical specifications of the universal pull-out testing machine series. The equipment range and configuration can be flexibly selected and customized according to the testing needs of customers for different specifications of anchor components.

Parameter project specification description

Maximum test force of 100 kN/200 kN/300 kN/500 kN (conventional series, supports higher tonnage customization)

Accuracy of force measurement system ≤± 1.0% of full scale

Displacement measurement accuracy ≤± 0.5% of full scale

Loading speed range 0.1~20 kN/s (continuously adjustable to meet various standards)

Cylinder piston stroke of 100~150 mm (providing sufficient testing displacement space)

Data sampling frequency ≥ 50 Hz (ensuring the dynamic curve is true and continuous)

Control and display unit with high-definition touch screen, Chinese operation interface, and data storage function

Hydraulic pump station power supply AC 380V or 220V, 50Hz (depending on the model)

Standard configuration list includes mainframe (including oil cylinder and reaction frame), intelligent measuring and control instrument, manual/electric hydraulic pump, and basic connection fixture.

Expanded optional accessories include multi specification reaction force support frame, dedicated pull-out joint, independent displacement measurement system, and upper computer data management software.

Choosing a reliable tensile testing machine is the fundamental commitment to engineering anchoring. We can provide a complete testing solution for your specific application.