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Logging winch
PRODUCT PARAMETERS
Description
Abstract
AbstractDJ Logging winch is a special equipment for geophysical exploration and geological survey. It is mainly used with other logging equipment. Most DJ Logging winch is anti-magnetic design, stepless speed adjustment and automatic cable arrangement. The performance can be applied to various geological prospecting areas.
DJ Logging winch equipment adopts frequency conversion motor, dcmotor, ac asynchronous motor as power source, and has a wide range of speed regulation, smooth variable speed, convenient operation, simple maintenance and so on. It can be used in geophysical prospecting and geological survey work on the land, sea, plateau (which is less than 5,500 meters above sea level) and other environments on the earth.
Features
1. Standardization and modularity
DJ Logging winch is powered by marine frequency conversion motor, tombarthite permanent magnet DC motor, industrial frequency conversion motor, dc motor, ac asynchronous motor as power source.The selection of power source mainly considers the factors such as high temperature and humidity environment, high altitude environment, convenient field transportation, convenient maintenance, long-term continuous operation and so on, so as to ensure the reliability of the whole set of equipment.
2. Automatic cable arrangement function
DJ Logging winch has automatic cable arrangement function, which ensures that the cable can be precisely and neatly arranged when dropping and lifting, and can greatly prolong the service life of the measuring cable. It is very important that the winch has automatic cable arrangement function especially for steel wire armored cable.
3. Standardization and modularity
DJ Logging winch has the automatic braking function. The winch can automatically stop when encountered in the use process of emergencies, such as power outages, winch controller failure and so on to keep the tube safe, so the tube will not fall.
4. Manual function
DJ Logging winch is equipped with a handle, which can drop or lift by hand without electricity in special circumstances.
5. Accurate measurement of cable length
DJ Logging winch has precise cable metering device to ensure that the instrument has an accurate depth in the process of lifting or dropping of cables.
6. Resistance to salt fog
DJ Logging winch for Marine geophysical survey adopt high strength aluminum alloy as the material. The surface is coated with electrostatic spraying, some fasteners are stainless steel. It takes Marine ac motor as power source, and the cable has kevlar wire and wire twisted rope core and it is coated with polyurethane.
7. The magnetization
For the purpose of electric logging, magnetic logging and other projects, the main structure of the DJ Logging winch adopt high strength aluminum alloy as material, which ensures that the logging cable can not be magnetized, and keep the minimum amount of self and mutual inductance.
Specifications
| NO | Name | Value |
| 1 | Working power supply | AC220V±10%/50Hz |
| 2 | External dimension | 440mm×480mm×390mm |
| 3 | Use the cable | 3.5mm Single core armored cable |
| 4 | Hoisting capacity | 3000N |
| 5 | Row line form | Automatic air line |
| 6 | Cable capacity | 1000m |
| 7 | Weight | 53.5Kg（Including cable 650 meters） |
| 8 | Depth | 0～9999.99m |
| 9 | Deviation | ≤0.5‰ |
| 10 | Speed adjustable range | 0-25m/min |
FAQ
In gravity exploration (SI), what is the unit of gravity? How to convert gravity units between SI and CGS?
① In SI, it is m·s-2, and one percent of it is the international unit abbreviation g.u.;
② Conversion between SI and CGS: 1g.u.=10-1 mGal
What are gravitational field and gravitational potential?
Gravitational field: The space around the earth with gravity is called the gravitational field.
Gravitational potential: The gravitational potential W in the gravitational field is equal to the work done by a particle of unit mass moving from infinity to that point.
What is the normal gravity field of the earth? What are the rules for the change of the normal gravity field with latitude and altitude?
① The normal gravity field of the earth: Assuming that the earth is a rotating ellipsoid (reference plane), the surface is glossy, the internal density is uniform, or it is distributed in concentric layers, the density of each layer is uniform, and the deviation of the shape of the ellipsoid from the geoid is very small, then the gravity field generated by the earth is the normal gravity field.
② The normal gravity value is only related to the latitude, the smallest at the equator and the largest at the poles, with a difference of about 50,000 g.u.; the rate of change of the normal gravity value with latitude is the largest at 45° latitude, and zero at the equator and the poles; the normal gravity value decreases with increasing altitude, and its rate of change is -3.086 g.u.. The main feature of the long-term change is the "westward drift" of the geomagnetic elements, both the dipole field and the non-dipole field drift westward, and have a global nature.
What is the relationship between gravitational field strength and gravitational acceleration?
The gravitational field strength is equal to the gravitational acceleration in both numerical and dimensional terms, and the two are in the same direction. In gravity exploration, all references to gravity refer to gravitational acceleration. The gravitational field strength at a point in space is equal to the gravitational acceleration at that point.
What is gravity exploration?
Gravity exploration is an exploration method that is based on the density difference of rocks and ores. Since density difference will cause local changes in the normal gravity field of the earth (i.e. gravity anomaly), it is used to solve geological problems by observing and studying gravity anomalies.
