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Pressurizing circuit, assisting hydraulic circuit and rotary drilling rig hydraulic system and rotary drilling rig

A technology of rotary drilling rig and auxiliary hydraulic pressure, applied in the direction of rotary drilling rig, rotary drilling, drilling equipment and methods, etc. low level issues

Active Publication Date: 2015-04-29
BEIJING SANY HEAVY MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing adjustment methods are all manual adjustments, which depend on the experience of the operator.
As a result, the reliability and fineness of the pressure adjustment of the pressurized cylinder are low, and the control has a certain hysteresis

Method used

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  • Pressurizing circuit, assisting hydraulic circuit and rotary drilling rig hydraulic system and rotary drilling rig
  • Pressurizing circuit, assisting hydraulic circuit and rotary drilling rig hydraulic system and rotary drilling rig

Examples

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Embodiment Construction

[0026] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. Various preferred embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0027] Embodiment 1 of the present invention provides a pressurization circuit, please refer to figure 1 . The pressurization circuit provided in this embodiment is used in a rotary drilling rig, specifically to provide power for the action of the pressurized oil cylinder and to control the action of the pressurized oil cylinder. The pressurization circuit can automatically adjust the pressurization pressure of the pressurized oil cylinder according to the load state of the power head. Specifically, the pressurization circuit provided in this embodiment includes: an auxiliary pump, a reversing valve 1 of the pressurized oil cylinder, and a pressurized oil cylinder; the rever...

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PUM

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Abstract

The invention discloses a pressurizing circuit, an assisting hydraulic circuit, a rotary drilling rig hydraulic system and a rotary drilling jig. The pressurizing circuit is applied to the rotary drilling jig, comprising an assisting pump, a pressurizing oil cylinder directional valve and a pressuring oil cylinder; the pressurizing oil cylinder directional valve comprises a pressurizing load feedback oil opening; the pressurizing circuit further comprises a proportional pressure adjusting device and a control device; the proportional pressure adjusting device is connected with the pressurizing load feedback oil opening; the control device is used for acquiring the current load information of a power head of the rotary drilling rig as well as controlling the adjusted pressure of the proportional pressure adjusting device according to the load information. According to the pressurizing circuit, the pressurizing pressure of the pressurizing oil cylinder can be automatically adjusted according to the load state o the power head, thus the pressure adjusting reliability can be further improved, the fineness degree and the sensitivity are improved.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a pressurizing circuit, an auxiliary hydraulic circuit, a hydraulic system of a rotary drilling rig and the rotary drilling rig. Background technique [0002] Rotary drilling rig is a construction machine for taking soil and forming holes for cast-in-place piles. It has the advantages of stable power transmission and high efficiency. It is widely used in various foundation constructions such as cast-in-place piles, continuous walls, and foundation reinforcement. The action principle of the rotary drilling rig is to rely on the power device to drive the drill pipe to realize the rotation of the rotary bucket to cut the rock and soil, and then lift it to the outside of the hole to unload the soil, and perform periodic cycle operations until the hole is formed. [0003] The hydraulic pressure of rotary drilling rig is composed of chassis, working device, electrical system and hy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02E21B3/00
CPCE21B3/00F15B13/02
Inventor 余建明周伟
Owner BEIJING SANY HEAVY MASCH CO LTD
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