I. Concrete Test Block Pressure Machine 300 Ton/3000KNMain Purpose

       This testing machine is used to determine the compressive strength of building materials such as bricks, stones, and concrete.

The machine employs electric hydraulic loading, sensor force measurement, digital display of force values, and a printer to record force data, which is then converted into compressive strength. This testing machine complies with the national standard "Standard for Test Methods of Mechanical Properties of Ordinary Concrete." It requires manual control of the loading speed and is equipped with a loading speed indicator, peak hold function, and overload protection. It is an essential testing and inspection equipment for construction, building materials, highway bridges, and other engineering units.

     II. Concrete Test Block Pressure Machine 300 Ton/3000KNMain Technical Parameters

1. Load:                   3000KN

2. Accuracy of Indication:           Grade 1

3.          Resolution:        0.1KN

4. Distance Between Compression Plates:  350mm

5. Upper and Lower Pressure Plate Specifications:    300×250mm

6. Piston Diameter*Stroke:    Diameter 290×80㎜

7. Motor Power:              0.75KW

8. Input Voltage:                380V

9. Overall Dimensions:          880×480×1400㎜

10. Net Weight:                   950kg

III. Concrete Test Block Pressure Machine 300 Ton/3000KNStructure Overview

The testing machine mainly consists of three parts: the body, the hydraulic control box, and the force measurement instrument.

1. Body Section

      The body of the testing machine is connected by four columns linking the cylinder body and the upper beam.

On the upper crossbeam of the testing machine, an adjustment screw, a large handwheel, and a nut screw are installed to adjust the no-load height of the machine. The lower end of the screw is equipped with a ball seat and an upper pressure plate. The lower pressure plate is placed on the piston of the oil cylinder. When the specimen contacts the upper pressure plate, the ball seat of the upper pressure plate can self-adjust for balance, ensuring the specimen remains level with the upper and lower pressure plates. The lower pressure plate is engraved with positioning lines for the specimen. During testing, the specimen must align with these lines. A dust cover is installed below the lower pressure plate to prevent or reduce dust from entering the oil cylinder during piston movement, which could damage the cylinder or oil seal. A sealing device is installed between the piston and the oil cylinder to prevent oil leakage. However, if a slight amount of oil leaks during use, an annular oil groove at the top of the cylinder body and an oil discharge channel will direct the oil back to the main tank.

2. Hydraulic Section

     The hydraulic box of this testing machine mainly consists of an oil tank, oil pump, oil filter, motor, speed valve, and return oil valve. The oil pump is a direct-rotating axial five-pillar pump. During loading, the loading speed valve should be manually controlled to regulate the piston's rising speed (this valve is integrated with the safety valve). During unloading, the return oil valve can be turned to allow the oil cylinder to descend slowly. The safety valve has been pre-set to an appropriate position at the factory. Under normal use, users should not adjust the safety valve.