Fully hydraulic reverse circulation drilling machine

Abstract

The invention provides a fully hydraulic reverse circulation drilling machine, which comprises a walking mechanism, a chassis assembly, a work table frame assembly, a main frame, a main frame turning oil cylinder, a swinging rod assembly, a winch assembly, a drill pipe, a dismounting device, a hydraulic system, a power take-off assembly, an impact drill bit, a rotating wing drill bit, a power assembly and an oil cylinder pulley assembly. A diesel engine or electric power is used for driving; hydraulic motors and oil cylinders are used as executing mechanisms; and the whole process operation of the drilling machine is realized through a hydraulic transmission and control system. The two hydraulic motors and a gear reducer are used for forming a power head to drive a drilling tool to rotate; the hydraulic motors adopt a serial connection or parallel connection mode; and the drill pipe realizes different rotating speeds and can adapt to different-geological-condition and different-hole-diameter operations. The oil cylinders are used for controlling the oil pipe feeding and lifting the drilling tool, so that the power head can vertically move along with the drilling tool and can realize floating, suspension stop and pressurized drilling; the drill pipe can be automatically dismounted and mounted; and the impact drill bit and the rotating wing drill bit are used for realizing the hole drilling of holes with the hole diameter being 2 to 3m and the hole depth exceeding 200m in the pebble bed, the hard rock stratum and the stratum containing large-diameter rock blocks.

Description

technical field [0001] The invention belongs to the technical field of hole-forming construction machinery, and in particular relates to a full hydraulic reverse circulation drilling machine. Background technique [0002] At present, the hole-forming construction machines widely used in the market include rotary drilling rigs and 8JH-80 series reverse circulation drilling rigs. [0003] Rotary drilling rig is a construction machine suitable for hole-forming operations in building foundation engineering. However, there are following disadvantages: 1. High equipment cost: the most widely used rotary drilling rig with a construction diameter of 1.5 to 2 meters and a drilling depth of 40 meters costs more than 4 million yuan. If the construction caliber is larger, the price of a drilling rig plus accessories will be tens of millions of yuan. 2. The volume of the equipment is both large and heavy: a set of equipment generally reaches tens of tons or even hundreds of tons, and t...

AI Technical Summary

Problems solved by technology

However, there are the following disadvantages: 1. High equipment cost: the most widely used rotary drilling rig with a construction diameter of 1.5 to 2 meters and a drilling depth of 40 meters costs more than 4 million yuan.

Although it is widely used in the market, it also has the following disadvantages: 1. The power head is noisy, the movement is not stable, and the equipment is unstable during operation.

2. The sealing effect of the mud pump and the reduction box is poor, and the operation is difficult when the drilling depth is more than 100

3. Due to the poor sealing effect, it takes a long time to evacuate the drill pipe during the drilling operation, so that the operation time is long

4. The drilling pressure of the drill bit comes from the weight of the mud pump, reduction box, drill pipe and drill bit. Therefore, when encountering hard rock formations, dense pebble layers, and boulder layers, the pressure cannot be forced, which will seriously affect the drilling. speed, can't even work

5. It is more difficult to construct in hard rock formations, denser pebble formations, and boulder formations (reference: market forecast and development ideas for rotary drilling rigs; Chinese patent, patent number ZL03260475.0, drilling rigs)

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