China HJYW-600B Computer-Servo Control Constant Stress Manhole-Cover Tester

Brief Introduction of the Tester:
The HJYW-600B manhole cover tester was designed and manufactured according to industrial standard and national standard such as CJ/T3012-1993<<CAST IRON MANHLOE COVER>>, CJ/T121-2000<< REGENERATIVE RESIN COMPOSTIE MATERIAL MANHOLE COVER >>, and JC889-2001<< STEEL FIBER REINFORCED ConCRETE MANHOLE COVER >>, GB23858-2009<< MANHOLE COVER >>, which is used for testing the load capacity of manhole cover. The structural performance of the tester completely comply with the requirements of all the standard and criterion, in the mean time, it also comply with the European standard: BS EN 124-1994.
NOTE: for GRAY IRON material, the tester can only carry out the breakdown test; for DUCTILE IRON material and other composite material, the tester can carry out the cyclic test,deformation test and breakdown test.
Main Technical Parameter:
1,maximum test force: 600KN
2,effective testing space: 1200mmx1200mm
3,the height of the workbench to the ground:500mm
4,force value precision:≤±1%(superior to 1grade)
5, regulating range of load-adding speed:0.1~25KN/s
6, deformation measurement range:0~20mm
7, deformation measurement precision: computer sampling: 0.01mm
8,piston stroke: 350mm
9,Overload protection: auto unload while exceeding 3% of full scale
10,load indicating precision: 0.1KN
11, load-adding mode: electrohydraulic
12,Load-adding control mode: computer control & manual stepless speed regulation, with the function of on-site programming
13,load-adding medium: 46# antiwear hydraulic oil
14,configured with Lenovo computer, LCD, HP printer.
15,motor power:0.75KW
16,voltage source needed: 380V/220V 50Hz
17,host machine dimension: L:1600mmxW:1200mmxH:1300mm
18,host machine weight: 2500Kg
Main Features:
1,The HJYW-600B tester adopts high rigidity structure to ensure the safety during the test.
2,The loading cylinder is set on the top, and the height of the worktable is 500mm, which is convenient for taking and placing the manhole cover specimen.

3, A ball hinged connection is adopted between the rigid pad and the pushing end of the piston to ensure complete contact between the manhole cover and the reaction force plate, and to ensure the authenticity of the measured bearing capacity.

4,A special material is used for sealing between the cylinder and the piston to achieve the effect of high sealing, low friction and long life.

5,Adopt professional oil pump motor unit special for tester, low noise and long life.

6, The ultra-precision oil filter is selected to ensure the cleanliness of the oil circuit system so as to ensure the long-term work of the control actuator.

7,Automatic computer control, real-time display of current force value, peak value, test process information, etc.

8,Record the test curve in real time and sample at high speed during the test;

9,The data and report processing functions provide users with a special report editing tool for graphic layout, which has the characteristics of flexible operation, easy to learn, and convenient printing of test curves and test values;

10,The control mode has constant speed stress, constant speed test force, test force retention and other control functions and test force, the screen display function of the test curve, the test curve power-time curve, etc., the control mode is smoothly converted.

11,The software automatically resets the system to reset the force value, eliminating factors such as human meter reading errors.

12,With overload protection, when the force value or displacement exceeds the rated theoretical value of the testing machine, it will automatically unload or stop the test.

13,Automatically collect and print the damage load and deformation values.

14,The deformation is measured at the bottom, and the data is accurate and stable.

15,According to the needs of the experiment on site, users can program themselves to achieve automatic closed-loop control. The machine can realize cyclic loading and automatically control according to the set loading speed and loading waveform. In short, it can program each index step of the national standard, so that the entire process can be automated without manual intervention.
Configuration of the HJYW-600B tester:
1,600KN manhole cover tester:1set
2,Hydraulic station: 1set
3,Lenovo computer&LCD: 1 set
4,HP printer: 1set
5,Operation manual,product qualification certificate ,guarantee card , packing list: 1set
6,Software installation disc: 1piece