Concrete pressure testing machine

1、 DYE-2000 modelConcrete pressure testing machineProduct Introduction:
Mainly used for testing the compressive strength of building materials such as concrete, bricks, stones, cement, refractory bricks, etc. This press uses hydraulic transmission to directly read the pressure on the test piece on the display screen of the force gauge, which is simple and fast. It has the characteristics of compact structure, easy operation, and high force measurement accuracy, and is the * product of engineering construction units such as construction, building materials, highways, bridges, mines, universities, etc.
2、 Main technical parameters:
1. Large test force: 2000kN
2. Rated pressure of hydraulic pump: 40MPa
3. Relative error of indication: ± 1%
4. Pressure plate size: 250 × 220mm
5. Large clearance between pressure plates: 320mm
6. Large stroke of piston: 50mm
7. Measurement range: 0-200kN
8. Resolution of force measurement: 0-1000kN 0.01kN
1000-2000kN 0.1kN
9. Dimensions (length x width x height): 890 x 370 x 1160mm
10. Net weight: 710kg
11. Packing size: 1080 × 580 × 1360mm
3、 Main structure and main functions:
（1） Structure:
DYE-2000 modelConcrete pressure testing machineIt mainly consists of the following three parts:
1. Press body part (see Figure 1 below)
Rack 3 is a sturdy frame made of ductile iron. The upper part of the rack is equipped with nuts 4 and connecting screws 2. At the end of the screw, there is a protruding ball seat 5 and an upper pressure plate 6. When the specimen is compressed, the contact between the upper pressure plate and the compression surface of the specimen can be automatically adjusted to match. According to the size of the specimen, turn handwheel 1 to adjust the screw rod to the appropriate height.
The surface of the lower pressure plate is engraved with positioning lines for easy placement of the specimen in the center position. Lower pressure plate 7 is placed on piston 8, and a dust cover 10 is installed under the lower pressure plate to prevent debris and foreign objects from falling into cylinder 11. When the piston is subjected to an increase in oil pressure, push the lower pressure plate upwards to press the specimen.
Cylinder 11 is located at the lower part of the frame, and a composite sealing ring 9 is embedded in the upper part of the inner wall of the cylinder to prevent oil leakage between the piston and the cylinder under high pressure, with minimal oil leakage. There is an overflow pipe on the upper left side behind the oil cylinder, which directly allows the overflow oil on the cylinder to flow back to the oil tank, thus keeping the surroundings of the machine clean.
If conducting compressive tests on concrete, it is recommended that users can make their own inclined bucket and tilt it towards the back to remove debris. To prevent the specimen from frequently moving and wearing down the pressure bearing plate, it is recommended to make a cushion plate that is suitable for the specimen size, but requires heat treatment (hardness HRC55 or above). After long-term abrasion, it is easy to replace.

2. Hydraulic control system

The pressure testing machine system includes an electric motor, a high-pressure oil pump, an oil delivery valve, an oil return valve, an oil tank, etc. The oil pump and motor 14 are connected by a coupling and seated on the oil tank 13, allowing high-pressure oil to directly enter the oil delivery valve 16. When the oil delivery valve is closed, the oil flows directly back to the oil tank. When the oil delivery valve is opened and the return valve 15 is closed, high-pressure oil enters the cylinder and is transmitted to the sensor, which sends the signal to the force gauge 18.
3. Force measurement system
This pressure testing machine system consists of hydraulic sensors, signal amplification converters, data processing, printers and control operation panels, transmission loading mechanisms, etc.
Front panel layout diagram:

Rear panel layout diagram:

（2） Main functions:
This pressure testing machine can achieve automatic control of the testing process. Automatically lock the breaking peak value, print the test results, and terminate the test at any time during the test process. It can automatically save test data, and can also save it in case of power failure. It can save a total of 3000 sets of data (one set of data can be a single block of data or 3 sets of data), and can query and print the saved data. The experimental data is reliable and easy to operate.
Pressure display: Five digit numerical display of pressure kN (kilonewtons). Real time display with pressure during the experiment, and the peak value of the fracture type remains displayed after the experiment is completed
Loading speed display: Four digit digital display of loading rate kN/s (kilonewtons per second)
During the loading process, according to the rules of GB/T50081-2002, the range of loading rates that should be controlled for different specimens is as follows:
Compressive test block with a cross-sectional area of 100 × 100mm2: 3.0~5.0kN/s when the strength is less than C30
When the strength is ≥ C30 and ＜ C60, it is 5.0-8.0kN/s
When the strength is ≥ C60, it is 8.0~10.0kN/s
Compressive test block with a cross-sectional area of 150 × 150mm2: 6.75-11.25kN/s when the strength is less than C30
11.25-18.00kN/s when the strength is ≥ C30 and ＜ C60
When the strength is ≥ C60, it is 18.00~22.50kN/s
Compressive test block with a cross-sectional area of 200 × 200mm2: 12.0~20.0kN/s when the strength is less than C30
When the strength is ≥ C30 and ＜ C60, it is 20.0~32.0kN/s
32.0~40.0kN/s when the strength is ≥ C60
Termination of Test: If any problems are found during the test, the "Stop" button can be pressed to cancel the test, and the test piece can be reinstated until it ruptures.
Print content: year, month, day, number, peak pressure, peak pressure (can be single or 3 blocks), test criteria and results.
Data storage: The data stored in the pressure testing machine system can still be retained after power failure, and the original stored data can be retrieved to print reports after power restoration. The large storage capacity of this system is 3000 test units. When you save the 3001st data, the first 1500 data are cleared, and the remaining data remains valid. The 1501st to 3000th data will be automatically moved to the top 1500 data points, and the 3001st data will be saved in the 1501st data point. Before conducting the 3001st data experiment, the first 1500 data should be saved. If communication software is used, it can also communicate with a microcomputer to archive the data inside the pressure testing machine for future reference or store it centrally through networking in the management center for computerized quality supervision management. This pressure testing machine system data sheet uses Microsoft Access software and is suitable for uploading data from a remote SQL Server database. The usage of communication software can be found in the instructions provided on the accompanying communication protocol CD.