Variable plunger pump system for drilling machine

Abstract

A variable displacement plunger pump system for a drilling rig, including an integrated control valve group, a plunger pump, a rotary motor, and an up and down motor, wherein the integrated control valve group is a slice valve, and the one-way regulating valve body, the rotary motor control valve , The upper and lower motor control valves correspond to the corresponding oil hole positions of the one-way pressure reducing valve body, so that the main oil circuit and the control oil circuit are connected, and the valves are connected in series with screws, and then the oil pipe and the pressure limiting flow control valve body are used. Connect, and finally connect with the plunger pump as a whole. The advantages are: the shape is flaky, and the control valve core with various functions and the corresponding oil circuit can be installed inside according to the needs. There is no pipeline connection with the hydraulic system, and the oil return hole of the integrated control valve is directly connected to the oil inlet hole of the plunger pump, which has the function of hydraulic power recovery. The main oil circuit cancels the hydraulic loss components of the overflow valve and the throttle valve, and the drilling rig has good controllability and stability. stability.

Description

technical field [0001] The invention relates to a plunger pump system for a drilling rig, in particular to a variable displacement plunger pump for a drilling rig. Background technique [0002] At present, various hydraulic control systems used on drilling rigs at home and abroad are driven by power to convert mechanical energy into pressure energy by hydraulic pumps, and then convert pressure energy into mechanical energy through actuators. During the conversion process, the actuators are realized by control valves with various functions. (Hydraulic motor, oil cylinder, etc.) rotation, up and down movement. These control valves (relief valves, throttle valves, proportional directional valves, etc.) have different degrees of loss of hydraulic power, resulting in high heat generation and high noise in the system, and the integration is not high, so the system and the pump cannot be integrated. When forming a system, there are many connecting pipelines, large volume, heavy we...

AI Technical Summary

Problems solved by technology

Some use manual proportional multi-way valves and variable pumps to connect with pipelines, with many connecting pipelines and complex structures

There are also practical problems existing on the current drilling rig, especially when working on various complex terrains (mountainous terrain), it is often necessary to move a location to drill a hole, to disassemble the equipment for the convenience of relocation, and it is troublesome to disassemble too many pipeline connections. The environment is also very easy to pollute the system and hydraulic oil through the pipeline, causing the oil pump and valve to be easily damaged.

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