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WO2021227452A1 - 一种旋挖钻机主卷扬系统及其控制方法 - Google Patents

一种旋挖钻机主卷扬系统及其控制方法 Download PDF

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Publication number
WO2021227452A1
WO2021227452A1 PCT/CN2020/133596 CN2020133596W WO2021227452A1 WO 2021227452 A1 WO2021227452 A1 WO 2021227452A1 CN 2020133596 W CN2020133596 W CN 2020133596W WO 2021227452 A1 WO2021227452 A1 WO 2021227452A1
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WIPO (PCT)
Prior art keywords
main
oil
valve
solenoid valve
port
Prior art date
Application number
PCT/CN2020/133596
Other languages
English (en)
French (fr)
Inventor
张永华
孙余
刘志刚
单昌猛
邱红臣
高霞芳
郜星
单俊云
耿倩斌
Original Assignee
徐州徐工基础工程机械有限公司
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Priority to US17/924,693 priority Critical patent/US12091293B2/en
Publication of WO2021227452A1 publication Critical patent/WO2021227452A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/28—Other constructional details
    • B66D1/40—Control devices
    • B66D1/42—Control devices non-automatic
    • B66D1/44—Control devices non-automatic pneumatic of hydraulic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/02—Driving gear
    • B66D1/08—Driving gear incorporating fluid motors
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/008—Winding units, specially adapted for drilling operations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20546—Type of pump variable capacity
    • F15B2211/20553—Type of pump variable capacity with pilot circuit, e.g. for controlling a swash plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/329—Directional control characterised by the type of actuation actuated by fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/355—Pilot pressure control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50563—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure
    • F15B2211/50581—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure using counterbalance valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5153—Pressure control characterised by the connections of the pressure control means in the circuit being connected to an output member and a directional control valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/665—Methods of control using electronic components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6652—Control of the pressure source, e.g. control of the swash plate angle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7058—Rotary output members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/77—Control of direction of movement of the output member
    • F15B2211/7733—Control of direction of movement of the output member providing vibrating movement, e.g. dither control for emptying a bucket
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/46—Automatic regulation in accordance with output requirements

Definitions

  • the invention belongs to the field of engineering machinery, in particular to a main hoisting system of a rotary drilling rig and a control method thereof.
  • Rotary drilling rig is a kind of piling machinery used for hole-making operations. After each working cycle, the soil in the drilling tool needs to be dumped, but the clay attached to the inner wall of the drilling tool will not fall by itself and often needs to go back and forth. Shake the drill tool to shake it off.
  • the manipulator will choose two methods to shake off the clay: firstly, quickly forward and reverse the power head back and forth, use the rotational inertia of the drill pipe, and shake off the soil by the back and forth collision between the power head and the drill rod; second, The main winch is shaken back and forth quickly, and the soil is shaken off by the back and forth collision of the drill rod and the drill bit by using the vibration of the spring of the drill rod itself.
  • the frequency and amplitude of soil shaking are more difficult to control. If the operation is too fast, the expansion and contraction of the drill pipe spring will be very small, and the shaking amplitude will be very small, and the earth shaking effect will not be achieved; if the operation is too slow, the frequency of collision between the drill pipe and the drill bit will be very small, and the same will not be achieved. To the earth shaking effect. Therefore, to master the operating frequency of the pilot handle completely depends on the operator, and it is difficult to ensure that the frequency and amplitude of the earth shaking are the same every time, and it is often not possible to achieve a good earth shaking effect.
  • the technical problem to be solved by the present invention is to overcome the above-mentioned shortcomings of the prior art and provide a rotary drilling rig main hoisting system and its control method which are sensitive and effective.
  • a main hoisting system of a rotary drilling rig including a main action circuit, a pilot control circuit, and a feedback control circuit
  • the main action circuit including an engine, a hydraulic pump, a main control valve, and a balance valve
  • the pilot control circuit includes a pilot handle, solenoid valve I, pressure relay and the main control valve in the main action circuit
  • the feedback control circuit includes the connection solenoid valve II and the hydraulic pressure in the main action circuit Pump and main control valve.
  • the oil supply port P1 of the hydraulic pump is connected to the P port of the main control valve
  • the A and B ports of the main control valve are connected to the oil inlet of the balance valve
  • the oil outlet of the balance valve It is connected with the oil inlet and outlet of the main winch motor
  • the T port of the main control valve is connected with the oil tank.
  • the oil inlet of the solenoid valve I is connected with the lift oil port of the pilot handle, the oil outlet of the solenoid valve I is connected with the lift pilot oil port Xb1 of the main control valve, and the oil return port of the solenoid valve I is connected with the oil tank.
  • the lower oil discharge port of the pilot handle is connected to the lower pilot oil port Xa1 of the main control valve, and the pressure relay is connected to the lift oil port of the pilot handle.
  • the oil inlet of the solenoid valve II is connected to the feedback oil port N1 of the main control valve, the oil outlet of the solenoid valve II is connected to the feedback oil port Pi of the hydraulic pump, and the oil return port of the solenoid valve II is connected to the oil tank connect.
  • the solenoid valve I and the solenoid valve II are both two-position three-way solenoid valves.
  • the pilot handle is switched to the lifting position, controlled by a button, and the solenoid valve I is energized and de-energized within a period of time;
  • the solenoid valve II is continuously energized, and the hydraulic pump is always maintained at the maximum displacement state.
  • step a the pilot handle is switched to the lifting position, the solenoid valve I is de-energized, the main control valve is opened, and the hydraulic pump supplies oil to the main winch motor; the solenoid valve I is energized, the main control valve 4 is closed, and the main winch is lifted. stop;
  • step b the main control valve is closed, the solenoid valve II is continuously energized, the feedback oil port Pi of the hydraulic pump is connected to the oil tank, the feedback pressure is reduced, and the hydraulic pump is in a state of maximum displacement.
  • step a in each cycle, the solenoid valve I is energized and de-energized once, and the energization time and the de-energization time are different values.
  • the present invention has the following advantages: the main hoist system of the rotary drilling rig of the present invention can realize the main hoist to shake up and down automatically by pressing a button, and the main hoist action is sensitive and can easily shake off the clay attached to the drilling tool. Instead of manual operation, the dependence on the operator is reduced, and the construction efficiency is improved.
  • Figure 1 is a schematic diagram of the overall structure of the present invention.
  • the main hoisting system of a rotary drilling rig as shown in Figure 1 includes a main action circuit, a pilot control circuit and a feedback control circuit.
  • the main action circuit includes an engine 1, a hydraulic pump 2, a main control valve 4, and a balance valve 5. ,
  • the pilot control circuit includes a pilot handle 7, a solenoid valve I8, a pressure relay 10, and a main control valve 4 in the main action loop.
  • the feedback control loop includes a connection solenoid valve II9 and a main control valve.
  • the hydraulic pump 2 and the main control valve 4 in the action circuit.
  • the solenoid valve I8 and the solenoid valve II9 are both two-position three-way solenoid valves.
  • the invention can realize the main winch to shake up and down automatically through the button control of the solenoid valve I8, and the main winch action is sensitive, can easily shake off the clay attached to the drilling tool, without manual operation, and reduces the operation The dependence of the operator improves the construction efficiency.
  • the oil supply port P1 of the hydraulic pump 2 is connected to the P port of the main control valve 4, and the A and B ports of the main control valve 4 are connected to the oil inlet of the balance valve 5, and the oil outlet of the balance valve 5
  • the port is connected with the oil inlet and outlet of the main hoist motor 6, and the T port of the main control valve 4 is connected with the oil tank 3 to form a main action circuit.
  • the oil inlet of the solenoid valve I8 is connected to the lifting oil port of the pilot handle 7, the oil outlet of the solenoid valve I8 is connected to the lifting pilot oil port Xb1 of the main control valve 4, and the oil return port of the solenoid valve I8 is connected to the oil tank 3 connection, the lower oil discharge port of the pilot handle 7 is connected to the lower pilot oil port Xa1 of the main control valve 4, and the pressure relay 10 is connected to the lifting oil port of the pilot handle 7 for detecting the lifting action, forming a pilot control loop .
  • the oil inlet of the solenoid valve II9 is connected to the feedback oil port N1 of the main control valve 4, the oil outlet of the solenoid valve II9 is connected to the feedback oil port Pi of the hydraulic pump 2, and the oil return port of the solenoid valve II9 Connect with the fuel tank 3 to form a feedback control loop.
  • the control method of the main winch system of the rotary drilling rig includes the following operation methods:
  • the pilot handle 7 is reversed to the lifting position, and controlled by the button, the solenoid valve I8 is energized and de-energized within one cycle; in each cycle, the solenoid valve I8 is energized and de-energized once, and the power-on time and power-off time Is a different value;
  • the solenoid valve II9 is continuously energized, and the hydraulic pump 2 is always maintained at the maximum displacement state.
  • step a when the pilot handle 7 is switched to the lift position, if the solenoid valve I8 is in a de-energized state, the lift oil port of the pilot handle 7 is connected with the lift pilot oil port Xb1 of the main control valve 4, and the main control valve 4 is opened.
  • the hydraulic pump 2 supplies oil to the main winch motor 6; if the solenoid valve I8 is energized, the lift pilot oil port Xb1 of the main control valve 4 is connected to the oil tank 3, the main control valve 4 is closed, and the main winch lifting action stops;
  • step b when the main control valve 4 is closed, if the solenoid valve II 9 is in a power-off state, the feedback port N1 of the main control valve 4 is connected to the feedback port Pi of the hydraulic pump, and the feedback pressure acts on the feedback oil of the hydraulic pump 2.
  • Port Pi the hydraulic pump 2 is in the minimum displacement state; if the solenoid valve II 9 is in the energized state, the feedback oil port Pi of the hydraulic pump 2 is connected to the oil tank 3, the feedback pressure is reduced, and the hydraulic pump 2 is in the maximum displacement state.
  • the two-position three-way solenoid valve 8 When the pilot handle performs the main winch lifting action, the two-position three-way solenoid valve 8 is energized and de-energized according to the established rules through the button control, and the pilot oil circuit in the lifting direction is continuously on and off, making the main winch in the lifting state Switch back and forth between the state and the pause state, the drill tool suspended by the main hoist will shake up and down according to certain rules, easily shake off the clay attached to the drill tool, and achieve the effect of shaking the soil; in the process of shaking the soil, the electromagnetic If the valve 9 is continuously energized, the hydraulic pump 2 is always maintained at the maximum displacement state.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
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Abstract

一种旋挖钻机主卷扬系统及其控制方法，包括主动作回路、先导控制回路和反馈控制回路，主动作回路包括发动机（1）、液压泵（2）、主控制阀（4）、平衡阀（5）、主卷扬马达（6）和油箱（3），先导控制回路包括先导手柄（7）、电磁阀Ⅰ（8）、压力继电器（10）以及主动作回路中的主控制阀（4），反馈控制回路包括电磁阀Ⅱ（9）以及主动作回路中的液压泵（2）和主控制阀（4）。在先导手柄（7）执行主卷扬提升动作时，通过按钮控制，使电磁阀Ⅱ（9）持续得电，电磁阀Ⅰ（8）按既定规则得电、失电，可实现主卷扬按一定规则上下抖动，轻松地将钻具上附着的粘土抖掉，提高施工效率。

Description

一种旋挖钻机主卷扬系统及其控制方法 技术领域
本发明属于工程机械领域，具体是一种旋挖钻机主卷扬系统及其控制方法。
背景技术
旋挖钻机是一种用于成孔作业的桩工机械，每一个工作循环结束，都需要将钻具里的土倒掉，但是附着在钻具内壁的粘土不会自己掉落，往往需要来回抖动钻具将其抖掉。
一般，操作机手会选择两种方法将粘土抖掉：一、来回快速地正、反转动力头，利用钻杆的转动惯性，靠动力头与钻杆的来回碰撞将土抖掉，二、来回快速地抖动主卷扬，利用钻杆自身弹簧的震颤，靠钻杆与钻头的来回碰撞将土抖掉。
对于第二种抖土方法，抖土的频率和幅度较难控制。如果操作的太快，钻杆弹簧的伸缩量就很小，抖动幅度就很小，达不到抖土效果；如果操作的太慢，钻杆与钻头碰撞的频率就很小，同样也达不到抖土效果。因此，要掌握好先导手柄的操作频率，完全取决于操作机手，而且人为操作很难保证抖土的频率和幅度每次都一样，往往达不到很好的抖土效果。
同时，第二种抖土方法的另一个不足之处在于：在手动抖土过程中，主控制阀会一开一关来回变化，液压泵的排量会随之来回变化，而使得主卷扬动作的响应速度受影响，操作手柄时，会感觉到主卷扬反应迟钝，有一定的滞后性，使抖土效果不理想。
发明内容
本发明所要解决的技术问题在于克服上述现有技术之不足，提供一种反应灵敏、效果良好的旋挖钻机主卷扬系统及其控制方法。
本发明是以如下技术方案实现的：一种旋挖钻机主卷扬系统，包括主动作回路、先导控制回路和反馈控制回路，所述主动作回路包括发动机、液压泵、主控制阀、平衡阀、主卷扬马达和油箱，所述先导控制回路包括先导手柄、电磁阀Ⅰ、压力继电器以及主动作回路中的主控制阀，所述反馈控制回路包括连接电磁阀Ⅱ以及主动作回路中的液压泵和主控制阀。
其进一步是：所述液压泵的供油口P1与主控制阀的P口连接，所述主控制阀的A口和B口与平衡阀的进油口连接，所述平衡阀的出油口与主卷扬马达的进出油口连接，所述主控制阀的T口与油箱连接。
所述电磁阀Ⅰ的进油口与先导手柄的提升油口连接，所述电磁阀Ⅰ的出油口与主控制 阀的提升先导油口Xb1连接，电磁阀Ⅰ的回油口与油箱连接，所述先导手柄的下放油口与主控制阀的下放先导油口Xa1连接，所述压力继电器连接在先导手柄的提升油口上。
所述电磁阀Ⅱ的进油口与主控制阀的反馈油口N1连接，所述电磁阀Ⅱ的出油口与液压泵的反馈油口Pi连接，所述电磁阀Ⅱ的回油口与油箱连接。
所述电磁阀Ⅰ和电磁阀Ⅱ均为两位三通电磁阀。
包括以下操作方法：
a、先导手柄换向至提升位，通过按钮控制，电磁阀Ⅰ在一个周期时间内得电、失电；
b、电磁阀Ⅱ持续得电，液压泵始终维持在最大排量状态。
步骤a中，先导手柄换向至提升位，电磁阀Ⅰ失电，主控制阀打开，液压泵为主卷扬马达供油；电磁阀Ⅰ得电，主控制阀4关闭，主卷扬提升动作停止；
步骤b中，关闭主控制阀，电磁阀Ⅱ持续得电，液压泵的反馈油口Pi与油箱连通，反馈压力降低，液压泵处于最大排量状态。
步骤a中，每一个周期，电磁阀Ⅰ得电、失电一次，得电时间和失电时间为不同的数值。
本发明具有以下优点：本发明的旋挖钻机主卷扬系统通过按钮就可以实现主卷扬自动地上下抖动，且主卷扬动作反应灵敏，能够轻松地将钻具上附着的粘土抖掉，而不用手动进行操作，降低对操作机手的依赖性，提高施工效率。
附图说明
图1是本发明的整体结构示意图；
图中：1、发动机，2、液压泵，3、油箱，4、主控制阀，5、平衡阀，6、主卷扬马达，7、先导手柄，8、电磁阀Ⅰ，9、电磁阀Ⅱ，10、压力继电器。
具体实施方式
如图1所示的一种旋挖钻机主卷扬系统，包括主动作回路、先导控制回路和反馈控制回路，所述主动作回路包括发动机1、液压泵2、主控制阀4、平衡阀5、主卷扬马达6和油箱3，所述先导控制回路包括先导手柄7、电磁阀Ⅰ8、压力继电器10以及主动作回路中的主控制阀4，所述反馈控制回路包括连接电磁阀Ⅱ9以及主动作回路中的液压泵2和主控制阀4。所述电磁阀Ⅰ8和电磁阀Ⅱ9均为两位三通电磁阀。本发明通过按钮控制电磁阀Ⅰ8就可以实现主卷扬自动地上下抖动，且主卷扬动作反应灵敏，能够轻松地将钻具上附着的粘土抖掉，而不用人为进行操作，降低了对操作机手的依赖性，提高了施工效率。
所述液压泵2的供油口P1与主控制阀4的P口连接，所述主控制阀4的A口和B口 与平衡阀5的进油口连接，所述平衡阀5的出油口与主卷扬马达6的进出油口连接，所述主控制阀4的T口与油箱3连接，构成主动作回路。
所述电磁阀Ⅰ8的进油口与先导手柄7的提升油口连接，所述电磁阀Ⅰ8的出油口与主控制阀4的提升先导油口Xb1连接，电磁阀Ⅰ8的回油口与油箱3连接，所述先导手柄7的下放油口与主控制阀4的下放先导油口Xa1连接，所述压力继电器10连接在先导手柄7的提升油口上，用于检测提升动作，构成先导控制回路。
所述电磁阀Ⅱ9的进油口与主控制阀4的反馈油口N1连接，所述电磁阀Ⅱ9的出油口与液压泵2的反馈油口Pi连接，所述电磁阀Ⅱ9的回油口与油箱3连接，构成反馈控制回路。
旋挖钻机主卷扬系统的控制方法，包括以下操作方法：
a、先导手柄7换向至提升位，通过按钮控制，电磁阀Ⅰ8在一个周期时间内得电、失电；每一个周期，电磁阀Ⅰ8得电、失电一次，得电时间和失电时间为不同的数值；
b、电磁阀Ⅱ9持续得电，液压泵2始终维持在最大排量状态。
步骤a中，先导手柄7换向至提升位时，若电磁阀Ⅰ8处于失电状态，则先导手柄7的提升油口与主控制阀4的提升先导油口Xb1连通，主控制阀4打开，液压泵2为主卷扬马达6供油；若电磁阀Ⅰ8处于得电状态，则主控制阀4的提升先导油口Xb1与油箱3连通，主控制阀4关闭，主卷扬提升动作停止；
步骤b中，主控制阀4关闭时，若电磁阀Ⅱ9处于失电状态，则主控制阀4的反馈油口N1与液压泵的反馈油口Pi连通，反馈压力作用于液压泵2的反馈油口Pi，液压泵2处于最小排量状态；若电磁阀Ⅱ9处于得电状态，则液压泵2的反馈油口Pi与油箱3连通，反馈压力降低，液压泵2处于最大排量状态。
在先导手柄执行主卷扬提升动作时，通过按钮控制，使两位三通电磁阀8按既定规则得电、失电，则提升方向的先导油路不断通断，使得主卷扬在提升状态与停顿状态之间来回切换，主卷扬所悬挂的钻具就会按一定规则上下抖动，轻松地将钻具上附着的粘土抖掉，达到抖土的效果；在抖土过程中，使电磁阀9持续得电，则液压泵2始终维持在最大排量状态。因为在抖土过程中，主控制阀4会一开一关来回变化，反馈压力随之变化，液压泵2的排量会来回变化，而使得主卷扬动作的响应速度受影响，使抖土效果不理想。

Claims (9)

  1. 一种旋挖钻机主卷扬系统，其特征在于：包括主动作回路、先导控制回路和反馈控制回路，所述主动作回路包括发动机(1)、液压泵(2)、主控制阀(4)、平衡阀(5)、主卷扬马达(6)和油箱(3)，所述先导控制回路包括先导手柄(7)、电磁阀Ⅰ(8)、压力继电器(10)以及主动作回路中的主控制阀(4)，所述反馈控制回路包括连接电磁阀Ⅱ(9)以及主动作回路中的液压泵(2)和主控制阀(4)。
  2. 如权利要求1所述的一种旋挖钻机主卷扬系统，其特征在于：所述液压泵(2)的供油口P1与主控制阀(4)的P口连接，所述主控制阀(4)的A口和B口与平衡阀(5)的进油口连接，所述平衡阀(5)的出油口与主卷扬马达(6)的进出油口连接，所述主控制阀(4)的T口与油箱(3)连接。
  3. 如权利要求1所述的一种旋挖钻机主卷扬系统，其特征在于：所述电磁阀Ⅰ(8)的进油口与先导手柄(7)的提升油口连接，所述电磁阀Ⅰ(8)的出油口与主控制阀(4)的提升先导油口Xb1连接，电磁阀Ⅰ(8)的回油口与油箱(3)连接，所述先导手柄(7)的下放油口与主控制阀(4)的下放先导油口Xa1连接，所述压力继电器(10)连接在先导手柄(7)的提升油口上。
  4. 如权利要求1所述的一种旋挖钻机主卷扬系统，其特征在于：所述电磁阀Ⅱ(9)的进油口与主控制阀(4)的反馈油口N1连接，所述电磁阀Ⅱ(9)的出油口与液压泵(2)的反馈油口Pi连接，所述电磁阀Ⅱ(9)的回油口与油箱(3)连接。
  5. 如权利要求1所述的一种旋挖钻机主卷扬系统，其特征在于：所述电磁阀Ⅰ(8)和电磁阀Ⅱ(9)均为两位三通电磁阀。
  6. 一种如权利要求1所述的旋挖钻机主卷扬系统的控制方法，其特征在于：包括以下操作方法：
    a、先导手柄(7)换向至提升位，通过按钮控制，电磁阀Ⅰ(8)在一个周期时间内得电、失电；
    b、电磁阀Ⅱ(9)持续得电，液压泵(2)始终维持在最大排量状态。
  7. 如权利要求6所述的旋挖钻机主卷扬系统的控制方法，其特征在于：步骤a中，先导手柄(7)换向至提升位，电磁阀Ⅰ(8)失电，主控制阀(4)打开，液压泵(2)为主卷扬马达(6)供油；电磁阀Ⅰ(8)得电，主控制阀4关闭，主卷扬提升动作停止。
  8. 如权利要求6所述的旋挖钻机主卷扬系统的控制方法，其特征在于：步骤b中，关闭主控制阀(4)，电磁阀Ⅱ(9)持续得电，液压泵(2)的反馈油口Pi与油箱(3)连通，反馈压力降低，液压泵(2)处于最大排量状态。
  9. 如权利要求6所述的旋挖钻机主卷扬系统的控制方法，其特征在于：步骤a中，每一个周期，电磁阀Ⅰ(8)得电、失电一次，得电时间和失电时间为不同的数值。
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