Rotary drilling rig is a kind of construction machine that is suitable for forming holes in building foundation engineering. Mainly suitable for sand, clay, silty soil and other soil layer construction, widely used in the construction of a variety of foundations such as cast-in-place pile, continuous wall, foundation reinforcement, etc. Rotary drilling rig's rated power is generally 125 ~ 450kW, power The output torque is 120～400kN·m, the maximum hole diameter can reach 1.5～4m, and the maximum hole depth is 60～90m, which can meet the requirements of various large-scale foundation construction.

This type of drilling rig is generally used hydraulic crawler type telescopic chassis, self-falling and collapsible drill collar, telescopic drill pipe, automatic detection and adjustment with verticality, hole depth digital display, etc. The whole machine operation generally adopts hydraulic pilot control and load sensing. With the operation of light, comfortable and so on. The main and auxiliary winches can be applied to the needs of various conditions on the construction site. This kind of drilling rig is equipped with different drilling tools and is suitable for drilling operations of dry (short spiral) or wet (rotary bucket) and rock formations (core drilling), and can also be equipped with long auger, underground continuous wall grab, vibration pile hammer Such as, to achieve a variety of functions, mainly for the municipal construction, roads and bridges, industrial and civil construction, underground continuous wall, water conservancy, seepage protection slope and other basic construction. Domestic experts believe that rotary drilling rigs still have a large market in the country in the next few years.

Types of

Minicomputer

The principle of selecting a rotary drilling rig should be to meet the user's current major engineering needs and to take into account possible future engineering needs. Rotary drilling rig root

According to its main operating parameters: torque, engine power, drilling diameter, drilling depth and drilling machine quality can be divided into three types:

Torque 100kN·m. The engine power is 170kW, the drilling diameter is 0.5 to 1m, and the drilling depth is about 40m. The overall quality of the drilling rig is about 40t. Minicomputer application market positioning:

(1) Slope protection piles for various buildings;

(2) Part of the bearing structure of the building;

(3) All kinds of piles less than 1m in urban reconstructed municipal projects;

(4) Piles suitable for other uses. The market coverage of minicomputers exceeds 30%.

Medium machine

Torque is 180kN·m, engine power is 200kW, drilling diameter is 0.8～1.8m, drilling depth is about 60m, and drilling rig quality is about 65t.

Medium Market Application Market Positioning:

(1) bridge piles of various highways, railways and other transportation facilities bridges;

(2) Load-bearing structural piles for large buildings and port terminals;

(3) Overhead bridge piles in the city;

(4) Other applicable piles. The market coverage of medium-sized machines reaches more than 90%.

Mainframe

Torque 240kN·m, engine power 300kW, drilling diameter 1～2.5m, drilling depth 80m. Drilling rig quality is more than 100t. Mainframe application market positioning:

(1) Special bridge piles for various highways and railway bridges;

(2) Special structures of other large buildings Load-bearing foundation piles. The mainframe's market workload has reached more than 10% coverage.