GZS-500 Microcomputer-Controlled Static Load Testing Machine for Railway Sleepers
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Description
Product Introduction:
The sleeper static load testing machine is designed for conducting static load crack‑resistance tests on concrete sleepers, including Type I, Type II, Type III, switch sleepers, bridge sleepers, and broad‑gauge sleepers. The equipment employs hydraulic loading, microcomputer control, and features real-time display of force, deformation, and displacement, as well as the ability to generate various graphs. It accurately measures the static load strength of different types of sleepers and evaluates their actual load‑carrying capacity. The machine primarily consists of a press, a carriage, guide rails, a lifting mechanism, a universal hydraulic power unit, and a digital display system.
Test Execution Standard:
1. GB/T 2611-2007 “General Technical Requirements for Testing Machines”
2. JJF 1103-2003 “Evaluation of Computer Data Acquisition Systems for Universal Testing Machines”
3. JJG 139-1999 “Verification Procedure for Tensile, Compression, and Universal Testing Machines”
4. GB/T 16826-2008 “Electro-Hydraulic Servo Universal Testing Machine”
5. TB/T 1879-2002 “Test Method for Static Load Crack Resistance of Prestressed Concrete Sleepers”
6. JJG (Railway) 158-96 “Verification Procedure for the 500 kN Concrete Sleeper Static Load Testing Machine”
Working principle:
The sleeper is hoisted onto the trolley, which is then pushed into the testing machine. Using the positioning scale, the sleeper’s position is adjusted so that its load center coincides with the center of the pressure plate. According to the preset test sequence, the piston lifts the sleeper rapidly—then approaches slowly—at a prescribed loading rate, maintaining a constant load—holding the load for 180 seconds—before unloading and returning to the designated position. (Alternatively, an additional load may be applied to induce cracking in the sleeper.) Upon completion of tests on the three loading surfaces, the test results are printed.
Product Features:
1. This testing machine employs servo‑based automatic control, hydraulic loading, electronic measurement, microcomputer display, and automated data processing. Its hydraulic system primarily consists of a fully digital servo valve and a high‑pressure oil pump, with automatic control implemented by a computer. The integrated oil‑source control system features an ergonomically positioned operator panel, facilitating convenient operation and observation.
2. The mainframe adopts a four‑column structure, comprising a base, hydraulic cylinder piston, upper and lower pressure plates, columns, an upper crossbeam, a spherical indenter, and related components, and features ample internal space, a large span, high rigidity, and excellent stability.
3. Bidirectional, dual‑control hydraulic cylinder with a long stroke, fast operation, rapid testing, and quick return.
4. The servo oil‑source control cabinet also serves as a computer workstation, equipped with motors and high‑pressure piston pumps from renowned domestic brands, along with a servo measurement and control system that delivers high precision, low noise, and rapid response. It enables automatic loading at a constant rate, constant‑force holding, and cyclic loading control. The silent‑type oil‑source pumping station features differential‑pressure tracking, filtration, and displays for oil temperature and fluid level.
5. The system comprises a fully digital multi-channel closed-loop measurement and control unit, sensors, a fully digital servo valve, a high-pressure oil pump, and an oil‑source control console. A computer performs automatic control, display, data acquisition, and data processing functions.
6. Equipped with a branded microcomputer and Windows 7‑based testing software, this testing machine measures the compressive properties of various materials in accordance with national standards or user‑specified requirements.
Technical Specifications:
| Parameter Category | Parameter content |
| Maximum load under the rail | 500 kN (customizable to 1000 kN) |
| Maximum load on the track | 400 kN (two 200 kN sensors) |
| Force range | 0~500 kN |
| Force measurement accuracy | ±0.5% |
| Duration of sustained loading | Arbitrary setting |
| Functionality | Automatic loading and unloading |
| Maximum piston stroke | 250mm |
| Sub-rail loading gauge | 300mm, 400mm, 500mm, 600mm |
| Track center loading gauge | 600mm, 1400mm–1600mm |
| Test space | |
| Distance between the upper and lower supports | 450mm |
| Distance between two columns | 820×920 (mm) |
| External dimensions | |
| Host (L×W×H) | 8500×1000×1920(mm) |
| Small vehicle (L×W×H) | 3400×760×110 (mm) |
| Use the power supply | 380V (three phases and neutral) |
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