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QFZ Tension Hollow Jack
Posted on: 2012-12-27 9:48:04 Author: Branch of hydraulic jacks Source: hydraulic jack factory

QFZ Tension Hollow Jack

Details of QFZ tensioning hollow jack :

QFZ Tension Hollow JackQFZ Tension Hollow Jack

Brief introduction : QFZ tensioning jack is a product developed according to foreign advanced technology combined with China's actual situation. Equipped with the ultra-high pressure electric oil pump station produced by our factory, it completes the jack tension function (also can be used for jacking), which is easy to operate and maintain. Mainly applicable to the construction of various prestressed concrete structures, widely used in highway, railway, power station, bridge construction, rock and soil anchoring, landslide management, overall lifting of large heavy objects, disassembly of interference fits, etc.

QFZ tensioning hollow jack use method and precautions:
In use, in addition to the general operating procedures and specifications, the following issues should be noted:
1 In order to ensure the correct transmission of measurement value, the selected jack and pump station should be paired for measurement value measurement, draw the tensile force (or extension force) and hydraulic pressure into a chart for reference during operation, and establish a reasonable verification cycle.
In the following cases, it should be recalibrated:
后 After the jack is repaired;
更换 Replace the pressure gauge;
⑶ Other accidental equipment is damaged.
2 Connect the jack to the pump station with a high-pressure hose according to the “jack construction, hydraulic system diagram”, and follow the steps below.
⑴ Start the pumping station and set the relief valve to the working pressure (for the pressure value, refer to the above calibration result).
⑵ By turning the handle of the reversing valve, the jack piston can reciprocate to complete the stretching or lifting action.
⑶ At the end of the jack action, please cut off the power of the pump station immediately to avoid the overflow valve being in working state for a long time, which will cause the oil temperature to rise rapidly and affect the service life of the pump station.
密切 Pay close attention to oil temperature in high temperature season. When oil temperature exceeds 70 ° C, cooling measures should be considered to maintain normal working conditions of the pumping station.

model
Raschenli
KN
Working pressure MPa
Through hole diameter d
Cylinder diameter D1
Inner diameter D2
Piston rod diameter D3
Cylinder outer diameter D
stroke
L
Minimum height L1
Joint spacing L2

Distance between connector and end face L3

QFZ450-25
450
60.34
43
120
70
100
160
250
442
300
55
QFZ600-25
600
57.90
55
140
80
115
180
250
442
300
55
QFZ1000-25
1000
53.77
65
170
85
130
210
200
360
250
56
QFZ2000-25
2000
62.59
104
240
130
200
290
200
403
255
69
QFZ3000-20
3000
63.34
119
280
150
200
355
200
450
288
82
QFZ5000-20
5000
53.85
165
400
210
320
615
200
630
318
134
QFZ6000-20
6000
64.62
185
400
210
320
515
200
630
318
134


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