Cable shop consists of the following main parts:
- cable plant;
- stationary winch (electric);
- technological winch (electric);
- marking system of geophysical cable;
- system of rotary rollers (to reduce the size of the shop);
- system of vertical rollers (for transferring a cable from one level to another);
- tension sensors (to control the tension when rewinding the cable).
The elements of the cable shop are installed in a building intended for processing a logging cable. The shop is powered by a three-phase current source with a voltage of 380 V, frequency 50 (+/- 1) Hz. The total power of energy consumers should not exceed 35 kW.
The cable shop provides:
- Reeling the geophysical cable from the technological winch (spool) to the stationary winch;
- Reeling the geophysical cable from the stationary winch through the marking system and the cable plant under tension to the lift;
- Reeling of the worn logging cable from the hoist to the technological winch (spool);
- Replace the ends of the logging cable on the winch.
Scheme of cable movement (stationary winch – WLTH)
|
Marked cables |
from 6.8 mm to 16 mm |
|
Limits of measuring the length and marking of cables |
from 10 to 7000 m |
|
Measuring speed |
up to 3000 m/h |
|
Basic error in measuring the length and marking of cables at the speed of movement (3000 +/- 10%) m / hour |
not more than 0.02% |
|
Additional error in measuring the length and marking of cables at speeds of 500 to 5000 m / h |
not more than 0.02% |
|
Distance between the main marks |
10 m |
|
Marking accuracy |
10.000 +/- 1 mm |
|
Polarity of magnetic marks |
SNNS |
|
Initial magnetic field strength of the marks in the center of the NN pole is 20 mm from the cable |
not less than 800 A / m |
|
Limits of cable tension setting |
from 0.05 to 3 tons |
|
Tension setting error |
+/- 20% |
|
Power installation |
220 +/- 20%, 50 Hz |
|
Operating conditions in stationary conditions with: • air temperature • relative humidity • atmospheric pressure |
10- 40 °С up to 98% 700-800 millimeter of mercury |