Machine d'essai de pression

de fatiguede déformationautomatique

The manhole cover pressure testing machine is primarily used to test the load-bearing capacity of manhole covers and is suitable for the following scenarios:Quality Inspection and Production: This machine is used for batch testing of manhole cover manufacturers before shipment to ensure product compliance with national standards.Municipal Engineering Acceptance: During road construction, it conducts random inspections of incoming manhole covers to verify their compressive strength.Research and Certification: This machine is used by quality inspection agencies and research institutions to conduct performance research and certification on new materials and structures, such as cast iron, composite materials, concrete, and other materials.Product Overview:Utilizes a microcomputer-controlled electro-hydraulic servo controller for automatic loading, driving the hydraulic cylinder, and a high-precision load sensor to measure the test force of the test specimen. It offers stable and reliable performance and accurate data.This testing machine is suitable for testing specimens with a load-bearing capacity greater than 20 kN and less than 1000 kN.Complies with the national GT/T2611 "General Technical Requirements for Testing Machines" and the national metrological verification regulations JIG139 "Tension, Compression, and Energy Testing Machines."This testing machine is suitable for compressive and flexural strength testing of manhole covers, meeting relevant standards such as CJ/T3012-1993 "Cast Iron Manhole Covers," CJ/T121-2000 "Recycled Resin Composite Material Manhole Covers," and JC889-2001 "Steel Fiber Concrete Manhole Covers."Features:The main unit utilizes a high-rigidity structure to ensure safety during testing.The loading cylinder is positioned upward for easy access to the manhole cover specimen.The bidirectional hydraulic cylinder provides faster lowering speed and higher efficiency.A spherical joint is used between the rigid pad and the piston push-out end to ensure complete contact between the manhole cover and the reaction plate, guaranteeing the accuracy of the measured load capacity.Special seals are used between the cylinder and piston, achieving high sealing, low friction, and long life.A professional testing machine oil pump motor unit is used for low noise and long life.An ultra-fine oil filter ensures cleanliness within the oil system, ensuring the long-term operation of the control actuators.Computer-controlled, with real-time display of current force value, peak value, and test progress information.Real-time recording of test curves and high-speed sampling during the test.Data and report processing functions provide users with a dedicated report editing tool for graphical layout. It features flexible operation, is easy to learn, and conveniently prints test curves and test values.Control modes include constant stress, constant force, and force hold. Test force, peak value, and test curves can be displayed on-screen. Test curves include force-time curves, and smooth control mode transitions.Users can program automatic closed-loop control based on experimental needs, including cyclic loading, loading speed, and loading waveforms (since the standard specifies a cyclic waveform loading process). In short, every step in the national standard can be programmed, making the entire process fully automated without manual intervention.The software includes an automatic force value zeroing system, eliminating factors such as human error in meter reading.Overload protection is provided for automatic unloading or test termination.Information such as the failure load is automatically collected and printed in reports.Specifications:Maximum test force: 1000 kNEffective test space: 1200mm x 1200mm (customizable upon request)Workbench height: 320mmLoading speed adjustment range: 0.1-25 kN/sDeformation measurement range: 0-20mmPiston stroke: 250mmLoad indication accuracy: 0.1 kNLoad control method: Microcomputer-controlled stepless speed regulation with automatic programmingLoading medium: 46# anti-wear hydraulic oilEquipped with a dedicated industrial control all-in-one computer and 17-inch LCD monitorMotor power: 1.5 kNMain unit weight: Approximately 1800 kgForce accuracy: ≤±0.5%Deformation measurement accuracy: Microcomputer-generated data acquisition 0.01 mmOverload protection point: Automatic unloading 3% over full scaleLoading method: Electric hydraulicRequired voltage: Three-phase four-wire