描述
Use:
Computer controlled hydraulic servo compression testing machine is mainly used to test compression strength of cement, concrete, rocks, brick. Space adjusting and test processes could be controlled by the software and the test result could be transferred to the software in the computer for further analysis.
It is the most advanced series in hydraulic compression testing machines. It is widely used in different steel works, engineering areas, quality control department, Universities and institutes as well as other areas and works.
Feature:
Fully computer controlled testing process.
Stable and reliable high intensity structure load frame.
Real time display software will provide accurate track of testing process.
Powerful multifunctional control software will provide more testing methods and standards.
Overload protection will secure operators.
Safe and reliable software interface and control. It is very easy to prevent mistake operation during the test stage which will cause damage to the testing machine.
Easy and fast to edit customized test reports in EXCEL format.
Main Structure:
This machine is mainly composed of the main unit, hydraulic system and force measurement unit, etc.
1. Main Unit:
It is mainly composed of the upper beam, column, adjusting screw rod, pressure-bearing plate, oil cylinder, piston and lifting motor, etc. At the end of the screw rod, there is an adjustable ball seat between it and the upper pressure plate. During operation, when the bottom surface of the upper pressure plate contacts the top surface of the specimen, it can automatically adapt to the slight inclination in the height direction of the specimen, ensuring that the two planes are in full contact, thereby ensuring uniform force on the specimen. According to the size of the specimen, it can automatically rise and fall to appropriately adjust the test space.
On the top surface of the lower pressure plate, there are positioning line frames, which facilitate placing the specimen at the center position.
2. Hydraulic Control System:
The hydraulic system consists of control valves, valve plates, and computer control system.
3. Force Measurement Unit:
It mainly includes the measurement and control system, printer and pressure sensor, etc.
4. Electrical System:
It is composed of electric motor, start button, stop button, AC contactor, fuse, etc.
Regularly check the cleanliness of the oil. Under normal circumstances, at least once a week, the oil in the oil tank should be drained from the oil drain port to remove the sediment.
The working principle is as shown in the following diagram:
To meet the new standards for concrete, we have specially developed a new type of digital micro-flow valve (patent number: ZL 96 2 42139.1). This valve is used in closed-loop control systems and has the following characteristics:
1. It has no hysteresis, high repeatability accuracy and resolution (the minimum stable flow rate is 7 ml/min).
2. It adopts direct digital control method, and the control signal can be directly transmitted through the standard RS232 interface, without any adverse factors such as temperature drift, zero drift and external interference of analog signals.
3. It has good reliability and working stability.
These three points are crucial for improving the performance of the closed-loop control system. In addition, this valve also has the function of low-pressure filtering and wave attenuation.
The market tests over the past four years have proved that all the indicators of this system have reached or exceeded the requirements of three national standards.
Parameter:
