WO2011023028A1 - 旋挖钻机高低双速加压系统 - Google Patents

旋挖钻机高低双速加压系统 Download PDF

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Publication number
WO2011023028A1
WO2011023028A1 PCT/CN2010/074321 CN2010074321W WO2011023028A1 WO 2011023028 A1 WO2011023028 A1 WO 2011023028A1 CN 2010074321 W CN2010074321 W CN 2010074321W WO 2011023028 A1 WO2011023028 A1 WO 2011023028A1
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WIPO (PCT)
Prior art keywords
circuit
valve
auxiliary
way valve
main
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PCT/CN2010/074321
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English (en)
French (fr)
Inventor
黎中银
黄志明
刘建开
胡堂堂
郑立永
Original Assignee
湖南三一智能控制设备有限公司
北京市三一重机有限公司
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Publication of WO2011023028A1 publication Critical patent/WO2011023028A1/zh

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Classifications

    • 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
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
    • 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
    • F15B2211/20576—Systems with pumps with multiple pumps
    • F15B2211/20584—Combinations of pumps with high and low capacity
    • 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
    • F15B2211/255—Flow control functions
    • 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6658—Control using different modes, e.g. four-quadrant-operation, working mode and transportation mode
    • 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
    • F15B2211/75—Control of speed of the output member

Definitions

  • the present invention relates to a high and low two-speed hydraulic control system, and more particularly to a control system for a rotary drilling rig having high and low two-speed pressurization capabilities.
  • the power head of the rotary drilling rig is mainly used to drive the drill rod to rotate and drill.
  • the power head is required to apply axial pressure to the drill rod and the slow axial pressure is applied; during the power head lifting process, In order to improve construction efficiency, the power head is required to quickly move up the movement.
  • the pressurized system of the rotary drilling rig currently used does not have a two-speed device that can make the power head low-pressure pressurized drilling and high-speed lifting.
  • the technical problem to be solved by the present invention is to provide a high and low two-speed pressurizing system for a rotary drilling rig that has a structural unit, an operating cylinder, a low-speed drilling of a power head, and a high-speed lifting function.
  • the high and low double speed pressurization system of the rotary drilling rig comprises a main hydraulic circuit, an auxiliary hydraulic circuit and a pressurized oil cylinder or a pressurized hoist;
  • the main hydraulic circuit comprises a main hydraulic pump and a three-position four-way valve of the main circuit.
  • the oil inlet of the three-position four-way valve of the main circuit is connected with the output end of the main hydraulic pump, and the oil outlet is connected with the oil tank
  • the auxiliary hydraulic circuit includes an auxiliary hydraulic pump and a three-position four-way valve of the auxiliary circuit, the auxiliary The oil inlet of the three-position four-way valve of the circuit is connected with the output end of the auxiliary hydraulic pump, and the oil outlet is connected with the oil tank, and the working oil of the three-position four-way valve of the main circuit and the working oil of the three-position four-way valve of the auxiliary circuit
  • the port is connected through the pipeline and then communicates with the pressurized oil cylinder or the pressurized hoisting working oil port through the first pipeline, and the working oil port of the three-way four-way valve of the main circuit and the three-position four-way valve of the auxiliary circuit are operated.
  • the oil port is connected through the pipeline and then communicates with the pressurized oil cylinder or the pressurized hoisting working oil port through the second
  • the method further includes a switching valve, the switching valve includes two sets of oil outlets, and the oil outlet is connected with a spool driving device of the auxiliary three-position four-way valve, and the oil outlet and the main circuit are three
  • the spool drive of the four-way valve is in communication.
  • the pressure control handle further comprises a pair of proportional pressure reducing valves and a pair of control circuits, one end of the control circuit is respectively connected with the proportional pressure reducing valve, and the other end is respectively connected with the switching valve
  • the oil inlet is connected.
  • the second pipeline is provided with a one-way balancing valve, and the one-way balancing valve is connected with a pressurized cylinder or a pressure hoisting, and the one-way balancing n is between the pressure cylinder or the pressure hoisting There is also a relief valve.
  • the pressure control handle is further provided with a switching button, and the switching is connected to the electromagnet of the switching valve.
  • the main hydraulic circuit further comprises a main circuit relief valve, and the main circuit relief valve is installed between the main hydraulic pump and the three-position four-way valve of the main circuit.
  • the auxiliary hydraulic circuit further includes a auxiliary circuit relief valve, and the auxiliary circuit relief valve is installed between the auxiliary hydraulic pump and the auxiliary circuit three-position four-way valve.
  • the main hydraulic circuit and the auxiliary hydraulic circuit in the high and low double-speed pressurizing system of the rotary drilling rig of the present invention are connected in parallel with the pressurized oil cylinder or the pressurized hoisting, and the output flow of the main hydraulic circuit is greater than the output flow of the auxiliary hydraulic circuit, and the main hydraulic pressure is controlled.
  • a three-position four-way valve in the circuit or auxiliary hydraulic circuit that gives the hydraulic pump a red or force to the pressurized oil. Press the hoist to supply oil, when the main hydraulic pump gives force. Pressure oil red or force. When the pressure is hoisted, the pressure cylinder or the pressure hoist can be quickly raised. When the auxiliary hydraulic pump supplies the pressure cylinder or the pressure hoist, the pressure oil red or the pressure hoist can be rushed. Pressurize.
  • the one-way balance valve and the overflow valve installed on the second pipeline in the high and low double-speed pressurization system of the rotary drilling rig of the present invention prevent hydraulic shock and gravity-induced stall when the pressurized cylinder or the pressurized hoisting moves up and down
  • the switching button in the pressurizing operation handle is used to control the power failure of the switching valve solenoid.
  • FIG. 1 is a schematic structural view of a high and low double speed pressurizing system of a rotary drilling rig according to the present invention.
  • the high and low two-speed pressurization system of the rotary drilling rig of the present invention comprises a pressure control handle 1.
  • Switching width 2 main hydraulic circuit 3, auxiliary hydraulic circuit 4 and pressurized cylinder or pressurized hoisting 5, pressurized cylinder or pressurized hoisting 5 for driving the power head of the rotary drilling rig, the main hydraulic circuit 3 including the output flow Large main hydraulic pump 3.1, main circuit three-position four-way valve 3.2 and main circuit relief valve 3.3, the main circuit three-position four-way valve 3.2 inlet port P1 is connected with the output of the main hydraulic pump 3.1, the oil outlet The T1 is connected to the fuel tank, and the main circuit relief valve 3.3 is installed between the main hydraulic pump 3.1 and the three-position four-way valve 3.2 of the main circuit.
  • the auxiliary hydraulic circuit 4 includes the auxiliary hydraulic pump 4.1 with a small output flow rate, and the auxiliary circuit three-position four-way.
  • Valve 4.2 and auxiliary circuit relief valve 4.3 the inlet port P2 of the auxiliary circuit three-position four-way valve 4.2 is connected with the output end of the auxiliary hydraulic pump 4.1, the oil outlet T2 is connected with the fuel tank, and the auxiliary circuit relief valve 4.3 is installed in the auxiliary
  • the working oil port A1 of the main circuit three-position four-way valve 3.2 and the working oil port A2 of the auxiliary circuit three-position four-way valve 4.2 are connected through the pipeline and then pass through the first
  • the pipeline 6 is connected to the working oil port A of the pressurized oil red or the pressurized hoisting 5, and the main circuit three-position four-way valve 3.2
  • the working port B1 of the oil port B1 and the auxiliary circuit three-position four-way valve 4.2 is connected through a pipeline and then communicate
  • the switching valve 2 includes two sets of oil outlets S1 and S2, and the oil outlet S1 is connected with the spool driving device of the auxiliary circuit three-position four-way valve 4.2, and the oil outlet S2 and the main circuit three-position four-way valve 3.2 valve core
  • the drive unit is in communication.
  • the pressurization control handle 1 includes a pair of proportional pressure reducing valves 1.1, 1.2 and a pair of control circuits 1.3, 1.4, one ends of the control circuits 1.3, 1.4 are respectively connected to the proportional pressure reducing valves 1.1, 1.2, and the other end is respectively connected to the switching valve 2
  • the oil inlet R is connected, and the pressure control handle 1 is also equipped with a switching button 3 ⁇ 4 1.5, which is connected to the electromagnet of the switching valve 2 for controlling the electromagnet of the switching valve 2, and is de-energized.
  • the control circuits 1.3 and 1.4 are in communication with the spool driving device of the auxiliary circuit three-position four-way valve 4.2.
  • the control circuits 1.3, 1.4 and the main The spool drive of the three-position four-way valve 3.2 of the circuit is connected.
  • the working process of the high and low speed pressurizing system of the rotary drilling rig of the present invention is as follows:
  • the control switch is used to de-energize the electromagnet of the switching valve 2, and the control circuits 1.3, 1.4 are connected to the spool driving device of the auxiliary circuit three-position four-way valve 4.2.
  • the control switch is 3 ⁇ 4 to make the electromagnet of the switching valve 2 energized, and the control circuits 1.3 and 1.4 are connected to the spool driving device of the main circuit three-position four-way valve 3.2.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Earth Drilling (AREA)
  • Types And Forms Of Lifts (AREA)

Description

旋挖钻机高低双速加压系统 本申请要求于 2009 年 08 月 27 日提交中国专利局、 申请号为 200920309021.6、 发明名称为 "旋挖钻机高低双速加压系统"的中国专利申 请的优先权， 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及一种高低双速液压控制系统， 特别是涉及一种用于旋挖钻 机的具有高低双速加压能力的控制系统。
背景技术
旋挖钻机的动力头主要用于带动钻杆旋转和钻进， 在钻进过程中， 需 要动力头对钻杆施加轴向压力， 并慢速轴向加压运动； 在动力头提升过程 中， 为了提高施工效率， 要求动力头能够快速轴向提升运动。 而目前所使 用的旋挖钻机的加压系统还不具有可以使动力头低速加压钻进、 高速提升 的双速装置。
发明内容
本发明要解决的技术问题是提供一种结构筒单、 操作筒便、 能够实现 动力头低速钻进、 高速提升功能的旋挖钻机高低双速加压系统。
本发明提供的旋挖钻机高低双速加压系统， 包括主液压回路、 辅液压 回路和加压油缸或加压卷扬； 所述主液压回路包括主液压泵、 主回路三位 四通阀， 所述主回路三位四通阀的进油口与主液压泵的输出端连接， 出油 口与油箱连通， 所述辅液压回路包括辅液压泵、 辅回路三位四通阀， 所述 辅回路三位四通阀的进油口与辅液压泵的输出端连接，出油口与油箱连通， 所述主回路三位四通阀的工作油口与辅回路三位四通阀的工作油口通过管 路连接再通过第一管路与加压油缸或加压卷扬的工作油口相连通， 所述主 回路三位四通阀的工作油口与辅回路三位四通阀的工作油口通过管路连接 再通过第二管路与加压油缸或加压卷扬的工作油口相连通； 所述主液压泵 的输出流量大于辅液压泵的输出流量。
优选的， 还包括切换阀， 该切换阀包括两组出油口和， 所述出油口与 辅回路三位四通阀的阀芯驱动装置相连通， 所述出油口与主回路三位四通 阀的阀芯驱动装置相连通。 优选的， 还包括加压控制手柄， 该加压控制手柄包括一对比例减压阀 和一对控制回路， 所述控制回路的一端分别与比例减压阀相连接， 另一端 分别与切换阀的进油口相连接， 当切换阀的电磁铁失电时， 控制回路与辅 回路三位四通阀的阀芯驱动装置相连通， 当切换阀的电磁铁得电时， 控制 回路与主回路三位四通阀的阀芯驱动装置相连通。
优选的， 所述第二管路上装有单向平衡阀， 所述单向平衡阀与加压油 缸或加压卷扬相连， 所述单向平衡 n与加压油缸或加压卷扬之间还装有溢 流阀。
优选的， 所述加压控制手柄上还装有切换按鈕， 所述切换按 ¾与切换 阀的电磁铁相连。
优选的， 所述主液压回路还包括主回路溢流阀， 所述主回路溢流阀安 装在主液压泵与主回路三位四通阀之间。
优选的， 所述辅液压回路还包括辅回路溢流阀， 所述辅回路溢流阀安 装在辅液压泵与辅回路三位四通阀之间。
本发明旋挖钻机高低双速加压系统中的主液压回路和辅液压回路并联 后与加压油缸或加压卷扬相连， 主液压回路的输出流量大于辅液压回路的 输出流量， 控制主液压回路或辅液压回路中的三位四通阀， 使液压泵给加 压油紅或力。压卷扬供油， 当主液压泵给力。压油紅或力。压卷扬供油时， 力口压 油缸或加压卷扬可以快速提升 ,当辅液压泵给加压油缸或加压卷扬供油时 , 加压油紅或加压卷扬可以†曼速加压。
本发明旋挖钻机高低双速加压系统中第二管路上所安装的单向平衡阀 和溢流阀， 防止在加压油缸或加压卷扬上下移动时， 出现液压冲击和重力 引起的失速； 加压操作手柄中的切换按鈕是为了控制切换阀电磁铁的得、 失电。
下面结合附图对本发明的旋挖钻机高低双速加压系统作进一步说明。 附图说明
图 1为本发明旋挖钻机高低双速加压系统的结构示意图。
具体实施方式
如图 1所示， 本发明旋挖钻机高低双速加压系统包括加压控制手柄 1、 切换阔 2、 主液压回路 3、 辅液压回路 4和加压油缸或加压卷扬 5 , 加压油 缸或加压卷扬 5用于驱动旋挖钻机的动力头， 主液压回路 3包括输出流量 较大的主液压泵 3.1、 主回路三位四通阀 3.2和主回路溢流阀 3.3 , 主回路 三位四通阀 3.2的进油口 P1与主液压泵 3.1的输出端连接， 出油口 T1与 油箱连通， 主回路溢流阀 3.3安装在主液压泵 3.1与主回路三位四通阀 3.2 之间，辅液压回路 4包括输出流量较小的辅液压泵 4.1、辅回路三位四通阀 4.2和辅回路溢流阀 4.3 ,辅回路三位四通阀 4.2的进油口 P2与辅液压泵 4.1 的输出端连接， 出油口 T2与油箱连通， 辅回路溢流阀 4.3安装在辅液压泵 4.1与辅回路三位四通阀 4.2之间， 主回路三位四通阀 3.2的工作油口 A1 与辅回路三位四通阀 4.2的工作油口 A2通过管路连接再通过第一管路 6 与加压油紅或加压卷扬 5的工作油口 A相连通， 主回路三位四通阀 3.2的 工作油口 B1与辅回路三位四通阀 4.2的工作油口 B2通过管路连接再通过 第二管路 7与加压油缸或加压卷扬 5的工作油口 B相连通， 第二管路 7上 装有单向平衡阀 8, 单向平衡阀 8与加压油虹或加压卷扬 5相连， 单向平 衡阀 8与加压油缸或加压卷扬 5之间还装有溢流阀 9。 切换阀 2包括两组 出油口 S1和 S2, 出油口 S1与辅回路三位四通阀 4.2的阀芯驱动装置相连 通， 出油口 S2与主回路三位四通阀 3.2的阀芯驱动装置相连通。
加压控制手柄 1包括一对比例减压阀 1.1、1.2和一对控制回路 1.3、 1.4, 控制回路 1.3、 1.4的一端分别与比例减压阀 1.1、 1.2相连接， 另一端分别 与切换阀 2的进油口 R相连接， 加压控制手柄 1上还装有切换按¾ 1.5 , 切换按 ¾ 1.5与切换阀 2的电磁铁相连用于控制切换阀 2的电磁铁的得、 失电， 当切换阀 2的电磁铁失电时， 控制回路 1.3、 1.4与辅回路三位四通 阀 4.2的阀芯驱动装置相连通，当切换阀 2的电磁铁得电时，控制回路 1.3、 1.4与主回路三位四通阀 3.2的阀芯驱动装置相连通。
本发明旋挖钻机高低速加压系统的工作过程筒述如下：
当需要加压油缸或加压卷扬 5低速进程时， 控制切换按 ¾使切换阀 2 的电磁铁失电， 则控制回路 1.3、 1.4与辅回路三位四通阀 4.2的阀芯驱动 装置相连通， 然后扳动比例减压阀 1.1 , 使辅回路三位四通阀 4.2的进油口 P2与工作油口 A2相连通， 出油口 T2与工作油口 B2相连通， 则辅液压泵 4.1将液压油低压慢速从第一管路 6输送至加压油缸或加压卷扬 5中，使加 压油缸或加压卷扬 5慢速进程。
当需要加压油缸或加压卷扬 5高速回程时， 控制切换按 ¾使切换阀 2 的电磁铁得电， 则控制回路 1.3、 1.4与主回路三位四通阀 3.2的阀芯驱动 装置相连通， 然后扳动比例减压阀 1.2, 使主回路三位四通阀 3.2的进油口 P1与工作油口 B1相连通， 出油口 T1与工作油口 A1相连通， 则主液压泵 3.1将液压油高压快速从第二管路 7输送至加压油缸或加压卷扬 5中，使加 压油缸或加压卷扬 5快速回程。
以上所述仅是本发明的优选实施方式， 应当指出， 对于本技术领域的 普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进、 润饰或变化， 比如， 切割环可以是相应管道的一部分， 也可以是单独设置 的具有较高耐磨性能的部件； 这些改进、 润饰或变化也应视为本发明的保 护范围。

Claims

权 利 要 求
1、一种旋挖钻机高低双速加压系统，其特征在于，包括主液压回路（ 3 )、 辅液压回路（4)和加压油缸或加压卷扬 （5); 所述主液压回路 (3 ) 包括 主液压泵（3.1)、 主回路三位四通阀 （3.2), 所述主回路三位四通阀 （3.2) 的进油口 P1与主液压泵（3.1 )的输出端连接， 出油口 T1与油箱连通， 所 述辅液压回路（4) 包括辅液压泵（4.1)、 辅回路三位四通阀 （4.2), 所述 辅回路三位四通阀 （4.2) 的进油口 P2与辅液压泵（4.1) 的输出端连接， 出油口 T2与油箱连通， 所述主回路三位四通阀 （3.2) 的工作油口 A1与 辅回路三位四通阀（ 4.2 )的工作油口 A2通过管路连接再通过第一管路（ 6 ) 与加压油缸或加压卷扬 （5) 的工作油口 A相连通， 所述主回路三位四通 阀 （3.2) 的工作油口 B1与辅回路三位四通阀 （4.2) 的工作油口 B2通过 管路连接再通过第二管路 (7) 与加压油缸或加压卷扬 （5) 的工作油口 B 相连通； 所述主液压泵（3.1 ) 的输出流量大于辅液压泵（4.1 ) 的输出流 量。
2、 根据权利要求 1所述的旋挖钻机高低双速加压系统， 其特征在于， 还包括切换阀 （ 2 ), 该切换阀 （ 2 ) 包括两组出油口 S1和 S2, 所述出油口 S1与辅回路三位四通阀 （4.2) 的阀芯驱动装置相连通， 所述出油口 S2与 主回路三位四通阀 （3.2) 的阀芯驱动装置相连通。
3、 根据权利要求 2所述的旋挖钻机高低双速加压系统， 其特征在于， 还包括加压控制手柄（ 1 ),该加压控制手柄（ 1 )包括一对比例减压阀（ 1.1、
1.2)和一对控制回路（1.3、 1.4), 所述控制回路（1.3、 1.4) 的一端分别 与比例减压阀 （1.1、 1.2)相连接， 另一端分别与切换阀 （2) 的进油口 R 相连接， 当切换阀 （2) 的电磁铁失电时， 控制回路（1.3、 1.4)与辅回路 三位四通阀 （4.2) 的阀芯驱动装置相连通， 当切换阀 （2) 的电磁铁得电 时， 控制回路（1.3、 1.4)与主回路三位四通阀 （3.2) 的阀芯驱动装置相 连通。
4、 根据权利要求 3所述的旋挖钻机高低双速加压系统， 其特征在于， 所述第二管路（7)上装有单向平衡阀 （8), 所述单向平衡阀 （8) 与加压 油缸或加压卷扬 (5)相连， 所述单向平衡阀 （8) 与加压油缸或加压卷扬 (5)之间还装有溢流阀 （9)。
5、 根据权利要求 4所述的旋挖钻机高低双速加压系统， 其特征在于， 所述加压控制手柄（ 1 )上还装有切换按鈕（ 1.5 ), 所述切换按鈕（ 1.5 )与 切换阀 （2) 的电磁铁相连。
6、 根据权利要求 1所述的旋挖钻机高低双速加压系统， 其特征在于， 所述主液压回路 ( 3 )还包括主回路溢流阀（ 3.3 ), 所述主回路溢流阀（ 3.3 ) 安装在主液压泵（3.1)与主回路三位四通阀 （3.2)之间。
7、 根据权利要求 1所述的旋挖钻机高低双速加压系统， 其特征在于， 所述辅液压回路 ( 4 )还包括辅回路溢流阀（ 4.3 ), 所述辅回路溢流阀（ 4.3 ) 安装在辅液压泵（4.1)与辅回路三位四通阀 （4.2)之间。
PCT/CN2010/074321 2009-08-27 2010-06-23 旋挖钻机高低双速加压系统 WO2011023028A1 (zh)

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