阅读说明：本技术 一种气动定向钻具定量油雾润滑装置和润滑方法 (Quantitative oil mist lubricating device and lubricating method for pneumatic directional drilling tool ) 是由 张�杰 王毅 黄寒静 李坤 王普 王力 洪建俊 李雨杰 于 2020-04-28 设计创作，主要内容包括：本发明涉及一种气动定向钻具定量油雾润滑装置和润滑方法,包括液压泵站、液压马达、计量泵、电磁比例换向阀、气体含油量恒比例调节器、气体管路、气体流量计以及接头和喷嘴；液压泵站的防爆电动机带动液压泵工作,然后驱动液压马达带动计量泵从油箱吸入液压油并输出至喷嘴形成油雾注入气体管路中；气体含油量恒比例调节器连接气体流量计和电磁比例换向阀,根据测定气体流量参数进行运算后控制电磁比例换向阀工作以调节输入液压马达的液压油流量,进而调节计量泵喷入气体管路中含油量以实现不同流量气体含油量恒比例调节。本发明对气体管路持续稳定恒比例注油,实现对气动定向钻具可靠润滑降温,有效提高钻具使用寿命。(The invention relates to a quantitative oil mist lubricating device and a lubricating method for a pneumatic directional drilling tool, which comprises a hydraulic pump station, a hydraulic motor, a metering pump, an electromagnetic proportional reversing valve, a gas oil content constant proportion regulator, a gas pipeline, a gas flowmeter, a joint and a nozzle, wherein the hydraulic pump station is connected with the hydraulic motor; an explosion-proof motor of the hydraulic pump station drives the hydraulic pump to work, and then the hydraulic motor is driven to drive a metering pump to suck hydraulic oil from an oil tank and output the hydraulic oil to a nozzle to form oil mist to be injected into a gas pipeline; the gas oil content constant proportion regulator is connected with the gas flowmeter and the electromagnetic proportion reversing valve, and the electromagnetic proportion reversing valve is controlled to work after calculation is carried out according to the measured gas flow parameters so as to regulate the hydraulic oil flow input into the hydraulic motor, and further regulate the oil content of the gas sprayed into the gas pipeline by the metering pump so as to realize the constant proportion regulation of the oil contents of the gases with different flows. The constant-proportion oil injection device continuously and stably injects oil into a gas pipeline, realizes reliable lubrication and cooling of the pneumatic directional drilling tool, and effectively prolongs the service life of the drilling tool.)

1. A quantitative oil mist lubricating device of a pneumatic directional drilling tool is characterized by comprising a hydraulic pump station (1), a hydraulic motor (2), a metering pump (3), an electromagnetic proportional directional valve (4), a gas oil content constant proportion regulator (5), a gas pipeline (6), a gas flowmeter (7) and a joint (8) which is arranged on the side wall of the gas pipeline (6) and penetrates through the inside and the outside of the gas pipeline (6);

an oil suction port and an oil return port of the metering pump (3) are communicated with an oil tank (11) of the hydraulic pump station (1); an oil outlet of the metering pump (3) is communicated to a joint (8) on the gas pipeline (6), and a nozzle (9) arranged in the gas pipeline (6) is installed at the end part of the joint (8);

an oil outlet of the hydraulic pump station (1) is communicated with the hydraulic motor (2) to drive the hydraulic motor (2) to operate, the hydraulic motor (2) is connected with the metering pump (3) to drive the metering pump (3) to work and output hydraulic oil to the nozzle (9), and the nozzle (9) can atomize the hydraulic oil to enable the hydraulic oil to be mixed with compressed gas in the gas pipeline (6) so as to lubricate and cool the pneumatic directional drilling tool along with the gas flow;

the electromagnetic proportional reversing valve (4) is arranged on an oil pipe between the hydraulic pump station (1) and the hydraulic motor (2); the input end of the gas oil content constant proportion regulator (5) is connected with a gas flowmeter (7) through a signal transmission line, the output end of the gas oil content constant proportion regulator is connected with the electromagnetic proportion reversing valve (4) through a control line, the gas oil content constant proportion regulator is used for carrying out operation according to measured gas flow parameters and preset gas oil content parameters and then controlling the work of the electromagnetic proportion reversing valve (4) to regulate the flow of hydraulic oil input into the hydraulic motor (2), and further the oil content of gas sprayed into the gas pipeline (6) by the metering pump (3) is regulated to realize the constant proportion regulation of the oil contents of different flows of gas so as to stabilize the gas oil content.

2. The quantitative oil mist lubrication device of the pneumatic directional drilling tool as claimed in claim 1, wherein the hydraulic pump station (1) comprises the oil tank (11), an explosion-proof motor (12), a hydraulic pump (13) and a base (14);

the explosion-proof motor (12) is connected with a hydraulic pump (13) through a coupler to drive the hydraulic pump (13) to operate, an oil suction port and an oil return port of the hydraulic pump (13) are communicated to the oil tank (11) through oil pipes to suck low-pressure oil from the oil tank (11) and discharge high-pressure oil, and an oil outlet of the hydraulic pump (13) is communicated with the hydraulic motor (2) through the oil pipes to input the high-pressure oil discharged by the hydraulic pump (13) into an oil inlet of the hydraulic motor (2) to drive the hydraulic motor (2) to operate;

the oil tank (11), the explosion-proof motor (12) and the hydraulic pump (13) are all installed on the base (14).

3. The quantitative oil mist lubrication device for the pneumatic directional drilling tool as claimed in claim 2, wherein the oil tank (11) is provided with a liquid level gauge and a thermometer for observing the oil level in the oil tank (11) and measuring the temperature of the hydraulic oil, respectively, and the oil tank (11) is further provided with a cooler for cooling the hydraulic oil of the hydraulic pump station (1) by cooling water.

4. The quantitative oil mist lubrication device for the pneumatic directional drilling tool as claimed in claim 1, wherein the gas pipeline (6) comprises an air inlet side gas pipeline (61) and an air outlet side gas pipeline (62), and two ends of the gas flowmeter (7) are respectively communicated with the air inlet side gas pipeline (61) and the air outlet side gas pipeline (62) in a sealing way through flange plates so as to monitor the air volume and the air pressure passing through the gas pipeline (6) and transmit the monitored gas flow parameters to the gas oil content constant proportion regulator (5);

the inner diameter of the gas flowmeter (7) is the same as the inner diameters of the air inlet side gas pipeline (61) and the air outlet side gas pipeline (62) so as to ensure that the gas flow parameter is accurately measured.

5. The quantitative oil mist lubrication device for the pneumatic directional drilling tool as claimed in claim 4, wherein the joint (8) is arranged on the air outlet side gas pipeline (62), the joint (8) is respectively communicated with the oil outlet of the metering pump (3) and the nozzle (9) so that the hydraulic oil output by the metering pump (3) is mixed with the high-speed wind flow after forming the oil mist at the nozzle (9) and flows into the pneumatic directional drilling tool along with the wind flow to meet the requirements of lubrication and cooling; the diameter range of the oil mist particles formed by the nozzle (9) is 5-100um, and the oil mist particles are uniformly distributed in high-speed airflow, so that the transportation and the lubrication are facilitated.

6. A quantitative oil mist lubrication method for a pneumatic directional drilling tool is characterized in that an explosion-proof motor of a hydraulic pump station operates to drive a hydraulic pump to work, then a hydraulic motor is driven to operate, an electromagnetic proportional reversing valve is controlled by a gas oil content constant proportion regulator to regulate the flow of hydraulic oil output to the hydraulic motor, the hydraulic motor rotates at a certain rotating speed to drive a metering pump to work, a metering pump with small displacement sucks hydraulic oil from an oil tank, then high-pressure hydraulic oil with required displacement is output to a gas pipeline, oil mist is sprayed out from a nozzle at a joint and is mixed with high-speed airflow flowing through the gas pipeline, and the high-pressure hydraulic oil is fed into the pneumatic directional drilling tool along with the airflow to meet the requirements of lubrication and cooling.

7. The quantitative oil mist lubrication method for the pneumatic directional drilling tool as claimed in claim 6, wherein when the gas flow in the gas pipeline changes, the gas oil content constant proportion regulator automatically regulates according to the gas flow parameter operation collected by the gas flowmeter, controls the electromagnetic proportional directional valve to regulate the flow, changes the output flow of the metering pump, and further ensures the continuous and stable oil content in the gas flow in the gas pipeline; the gas oil content constant proportion regulator has the preset parameter setting range of 0-0.005%, and after the parameter is preset, the output flow is controlled according to the parameter so as to reach the set gas oil content.

Technical Field

The invention belongs to the technical field of underground coal mine drilling, and particularly relates to a self-adjusting oil mist lubricating device and a lubricating method for an underground pneumatic directional drilling tool.

Background

The pneumatic directional drilling tool applied to the underground coal mine is a novel drilling tool suitable for directional drilling construction of a soft coal seam at present, the drilling tool drives a screw motor stator and a screw motor rotor to rotate in a matching mode through compressed gas, and the rotating speed range is 300r/min in normal operation; in the high-speed rotation process of the screw motor rotor, the stator and the rotor directly generate friction, if effective lubrication and cooling cannot be performed on the stator and the rotor, the stator rubber of the pneumatic drilling tool is rapidly abraded and aged to lose effectiveness, and the service life of the whole drilling tool is seriously influenced. Generally, a conventional lubricating and cooling mode is a method of adding certain foam liquid or water atomization into compressed gas for driving a screw rod directional drilling tool, but the method has poor lubricating effect, not only can rust the internal structure of the screw rod drilling tool, but also is easy to stick the drilling tool after liquid drops are condensed at the bottom of a hole and mixed with coal powder, and is not beneficial to slag discharge to influence normal and safe construction; lubricating oil is added into a compressed gas pipeline directly and discontinuously or lubricating oil is added into an oil tank, the problem of poor reliability exists although a certain effect exists, the lubricating process of the pneumatic drilling tool is discontinuous and unstable, the amount of oil (oil content) mixed in compressed gas is sometimes zero, sometimes and sometimes, less, the effect is difficult to guarantee, the injected oil amount cannot be accurately measured, and the continuous, stable and reliable lubricating effect of the pneumatic directional drilling tool cannot be realized.

Disclosure of Invention

Aiming at the defects and shortcomings in the prior art, the invention provides a self-adjusting oil mist lubricating device and a lubricating method for a pneumatic directional drilling tool, which have the advantages of simple structure and convenience in operation, and are mainly used for carrying out continuous and stable quantitative oil injection on compressed gas for driving the pneumatic directional drilling tool to operate, so that certain oil content in the compressed gas is ensured, the reliable lubricating and cooling effects on the pneumatic directional drilling tool are realized, and the service life of the drilling tool is effectively prolonged.

In order to achieve the purpose, the invention adopts the following technical scheme:

a quantitative oil mist lubricating device of a pneumatic directional drilling tool comprises a hydraulic pump station, a hydraulic motor, a metering pump, an electromagnetic proportional directional valve, a gas oil content constant proportion regulator, a gas pipeline, a gas flowmeter and a joint, wherein the joint is arranged on the side wall of the gas pipeline and penetrates through the inside and the outside of the gas pipeline;

an oil suction port and an oil return port of the metering pump are both communicated with an oil tank of the hydraulic pump station; the oil outlet of the metering pump is communicated to a joint on the gas pipeline, and the end part of the joint is provided with a nozzle arranged in the gas pipeline;

an oil outlet of the hydraulic pump station is communicated with a hydraulic motor to drive the hydraulic motor to operate, the hydraulic motor is connected with a metering pump to drive the metering pump to work and output hydraulic oil to a nozzle, and the nozzle can atomize the hydraulic oil to be mixed with compressed gas in a gas pipeline so as to lubricate and cool the pneumatic directional drilling tool along with air flow; the nozzle forms oil mist particles with the diameter range of 5-100um, and the tiny particles are uniformly distributed in the high-speed airflow, so that the transportation and the lubrication are facilitated.

The electromagnetic proportional reversing valve is arranged on an oil pipe between the hydraulic pump station and the hydraulic motor, the input end of the gas oil content constant proportion regulator is connected with the gas flowmeter through a signal transmission line, the output end of the gas oil content constant proportion regulator is connected with the electromagnetic proportional reversing valve through a control line, the electromagnetic proportional reversing valve is operated according to a measured gas flow parameter and a preset gas oil content parameter and then controlled to work so as to regulate the hydraulic oil flow input to the hydraulic motor, and further the oil content of gas sprayed into a gas pipeline by the metering pump is regulated so as to realize the constant proportion regulation of the oil contents of different flows of gas and stabilize the oil content of the gas.

The gas oil content constant proportion regulator has the preset parameter setting range of 0-0.005%, and after the parameter is preset, the output flow is controlled according to the parameter so as to reach the set gas oil content.

The invention also comprises the following technical characteristics:

specifically, the hydraulic pump station comprises the oil tank, an explosion-proof motor, a hydraulic pump and a base;

the explosion-proof motor is connected with a hydraulic pump through a coupler to drive the hydraulic pump to operate, an oil suction port and an oil return port of the hydraulic pump are communicated to the oil tank through oil pipes to suck low-pressure oil from the oil tank and discharge high-pressure oil, and an oil outlet of the hydraulic pump is communicated with the hydraulic motor through the oil pipes to input the high-pressure oil discharged by the hydraulic pump into an oil inlet of the hydraulic motor to drive the hydraulic motor to operate;

the oil tank, the explosion-proof motor and the hydraulic pump are all installed on the base.

Specifically, the oil tank is equipped with level gauge and thermometer, is used for observing oil level in the oil tank respectively and measures the hydraulic oil temperature, still is equipped with the cooler in the oil tank, cools down hydraulic pump station hydraulic oil through the cooling water.

Specifically, the gas pipeline comprises a gas inlet side gas pipeline and a gas outlet side gas pipeline, two ends of the gas flowmeter are respectively communicated with the gas inlet side gas pipeline and the gas outlet side gas pipeline in a sealing mode through flanges so as to monitor the air volume and the air pressure of the gas pipeline, and the monitored gas flow parameters are transmitted to the gas oil content constant proportion regulator;

the inner diameter of the gas flowmeter is the same as the inner diameters of the gas inlet side gas pipeline and the gas outlet side gas pipeline so as to ensure that the gas flow parameter measurement is accurate.

Specifically, the joint is arranged on the air outlet side gas pipeline and is respectively communicated with the oil outlet of the metering pump and the nozzle, so that hydraulic oil output by the metering pump is mixed with high-speed air flow after forming oil mist at the nozzle and flows into the pneumatic directional drilling tool along with the air flow, and the requirements of lubrication and cooling are met.

The invention also provides a quantitative oil mist lubrication method for the pneumatic directional drilling tool, wherein an explosion-proof motor of a hydraulic pump station operates to drive a hydraulic pump to work, the hydraulic pump sucks hydraulic oil from an oil tank and then outputs the hydraulic motor to operate, an electromagnetic proportional reversing valve is controlled by a gas oil content constant proportion regulator to regulate the flow of the hydraulic oil output to the hydraulic motor, the hydraulic motor rotates at a certain rotating speed to drive a metering pump to work, a metering pump with small displacement sucks the hydraulic oil from the oil tank and then outputs high-pressure hydraulic oil with required displacement to a gas pipeline, a nozzle at a joint sprays oil mist to be mixed with high-speed air flow flowing through the gas pipeline, and the high-pressure hydraulic oil mist is fed into the pneumatic directional drilling tool along with the air flow.

Specifically, when the gas flow in the gas pipeline changes, the gas oil content constant proportion regulator automatically regulates according to the gas flow parameter operation collected by the gas flowmeter, controls the electromagnetic proportional directional valve to regulate the flow, changes the output flow of the metering pump, and further ensures the continuous and stable oil content in the gas pipeline gas flow.

Compared with the prior art, the invention has the beneficial technical effects that:

1. the metering pump of the lubricating device discharges a certain amount of lubricating oil to form spray, the spray enters the gas pipeline, the spray is uniformly mixed with the high-speed airflow and then is sent to the pneumatic directional drilling tool, the continuous and stable lubricating oil quantity can be provided for the pneumatic directional drilling tool, the lubricating and cooling effects are achieved, the normal operation of the drilling tool is ensured, and the service life of the drilling tool is prolonged. And make hydraulic oil and gas mixture more abundant more even after forming the oil mist through the nozzle, be favorable to improving lubricated effect.

2. The lubricating device is provided with a gas oil content constant proportion regulator, and when the gas flow in a gas pipeline changes, the gas oil content constant proportion regulator calculates and automatically regulates according to the collected flow parameters to change the output flow of the metering pump; when the air volume is increased, the discharge capacity is correspondingly increased, and when the air volume is reduced, the oil volume is correspondingly reduced, so that the stable oil content in the input high-speed airflow can be ensured, and the lubricating effect is ensured.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a working principle diagram of the present invention.

FIG. 3 is a schematic view of the piping connection of the lubrication use portion of the present invention.

Reference signs mean: 1-a hydraulic pump station, 2-a hydraulic motor, 3-a metering pump, 4-an electromagnetic proportional reversing valve, 5-a gas oil content constant proportion regulator, 6-a gas pipeline, 7-a gas flowmeter, 8-a joint and 9-a nozzle;

11-an oil tank, 12-an explosion-proof motor, 13-a hydraulic pump and 14-a base;

61-air inlet side gas pipeline, 62-air outlet side gas pipeline; 63-high pressure gas line;

10-drilling tool; 101-orienting a drill pipe; 102-pneumatic directional drilling tool; 103-pilot bit.

The invention is described in detail below with reference to the drawings and the detailed description.

Detailed Description

The invention aims to provide a self-adjusting oil mist lubricating device and a lubricating method for a coal mine underground pneumatic directional drilling tool, which are simple in structure and convenient to operate, are mainly used for performing oil injection lubrication on the coal mine underground pneumatic directional drilling tool, providing continuous and stable lubricating oil, playing a role in reliable lubrication and cooling, ensuring the normal operation of a screw drilling tool and prolonging the service life of the drilling tool.

The present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention fall within the protection scope of the present invention. The present invention will be described in further detail with reference to examples.