WO2021174931A1 - Dispositif et système comprenant une logique de commande pour commuter automatiquement entre une haute et une basse pression, et son procédé de commande - Google Patents

Dispositif et système comprenant une logique de commande pour commuter automatiquement entre une haute et une basse pression, et son procédé de commande Download PDF

Info

Publication number
WO2021174931A1
WO2021174931A1 PCT/CN2020/133555 CN2020133555W WO2021174931A1 WO 2021174931 A1 WO2021174931 A1 WO 2021174931A1 CN 2020133555 W CN2020133555 W CN 2020133555W WO 2021174931 A1 WO2021174931 A1 WO 2021174931A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
oil
check valve
hydraulic control
port
Prior art date
Application number
PCT/CN2020/133555
Other languages
English (en)
Chinese (zh)
Inventor
贾建辉
沈千里
苏艳玲
石峰
Original Assignee
徐州徐工施维英机械有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 徐州徐工施维英机械有限公司 filed Critical 徐州徐工施维英机械有限公司
Publication of WO2021174931A1 publication Critical patent/WO2021174931A1/fr

Links

Images

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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/08—Regulating by delivery 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
    • 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
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • 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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/001—Servomotor systems with fluidic 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
    • F15B2013/004—Cartridge 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
    • 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
    • F15B2211/78—Control of multiple output members

Definitions

  • the present disclosure relates to a high and low voltage automatic switching control logic device, a system and a control method thereof, and belongs to the technical field of high and low voltage automatic control.
  • the present disclosure provides a high and low voltage automatic switching control logic device, which includes a first control logic unit, a second control logic unit, and a control port assembly; the first control logic unit communicates with the second control port assembly through the control port assembly.
  • the control logic unit is connected;
  • the control oil port assembly includes a first control oil port, a second control oil port, a third control oil port, and a fourth control oil port;
  • the first control logic unit includes a first pressure oil port, a first hydraulic control check valve, a second hydraulic control check valve, a third hydraulic control check valve, a fourth hydraulic control check valve and a first cartridge
  • the valve control oil port, the first pressure oil port is respectively connected to the control oil port of the first cartridge valve, the control oil circuit of the first hydraulic control check valve, and the control of the second hydraulic control check valve
  • the second control logic unit includes a second pressure port, a fifth hydraulic control check valve, a sixth hydraulic control check valve, a seventh hydraulic control check valve, an eighth hydraulic control check valve, and a second cartridge
  • the valve control oil port, the second pressure oil port is respectively connected to the second cartridge valve control oil port, the control oil circuit of the fifth hydraulic control check valve, and the control of the sixth hydraulic control check valve
  • the first control oil port is respectively connected to the oil outlet of the first hydraulic control check valve and the oil outlet of the fifth hydraulic control check valve
  • the second control oil port is connected to the fourth The oil outlet of the hydraulic control check valve and the oil outlet of the eighth hydraulic control check valve
  • the third control oil port is respectively connected to the oil outlet of the second hydraulic control check valve and the first The oil outlet of the six hydraulic control check valve
  • the fourth control oil port is respectively connected to the oil outlet of the third hydraulic control check valve and the oil outlet of the seventh hydraulic control check valve.
  • the hydraulic system includes a first three-position four-way reversing valve, a second three-position four-way reversing valve, a first spool valve, a second spool valve, a first cartridge valve, and a second cartridge valve ,
  • the first oil cylinder and the second oil cylinder in which the first three-position four-way reversing valve, the second three-position four-way reversing valve, the first spool valve and the second spool valve are all spool valves;
  • the first cartridge valve is respectively Connect the rod cavity of the first oil cylinder, the rod cavity of the second oil cylinder and the first spool valve.
  • the first spool valve is connected with the second three-position four-way reversing valve; the second cartridge valve is connected to the valve of the first oil cylinder The rod cavity, the rodless cavity of the second cylinder and the second slide valve, the second slide valve is connected with the first three-position four-way reversing valve; the first three-position four-way reversing valve, the second three-position four-way reversing valve
  • the valve pumps high-pressure oil externally through the oil supply port.
  • the spools of the first three-position four-way reversing valve, the second three-position four-way reversing valve, the first spool valve and the second spool valve are laid out flat, and the first hydraulically controlled one-way valve ,
  • the second hydraulic control check valve, the third hydraulic control check valve, the fourth hydraulic control check valve, the fifth hydraulic control check valve, the sixth hydraulic control check valve, the seventh hydraulic control check valve and the first Eight hydraulic control check valves constitute four groups of hydraulic control check valves distributed at both ends; or the first three-position four-way reversing valve, the second three-position four-way reversing valve, the first spool valve and the second spool valve
  • the spool is arranged in two layers, the first hydraulic control check valve, the second hydraulic control check valve, the third hydraulic control check valve, the fourth hydraulic control check valve, the fifth hydraulic control check valve, and the sixth hydraulic control check valve.
  • the hydraulic control check valve, the seventh hydraulic control check valve and the eighth hydraulic control check valve constitute four groups of hydraulic
  • a circulating oil circuit for low-pressure pumping further includes: pressure oil passing through the first pressure oil port and the first control oil port, the first hydraulic control check valve, the second hydraulic control check valve, and the first hydraulic control check valve.
  • the three hydraulic control check valve and the fourth hydraulic control check valve are in the reverse connection state, the fifth hydraulic control check valve, the sixth hydraulic control check valve, the seventh hydraulic control check valve and the eighth hydraulic control check valve.
  • the one-way valves are in the reverse closed state, and the third control port and the fourth control port alternately show pressure oil; or the first pressure port and the second control port have pressure oil passing through, the first hydraulic control check valve ,
  • the second hydraulic control check valve, the third hydraulic control check valve and the fourth hydraulic control check valve are all in the reverse connection state, the fifth hydraulic control check valve, the sixth hydraulic control check valve, the seventh
  • the hydraulic control check valve and the eighth hydraulic control check valve are both in a reverse closed state, and pressure oil alternately appears at the third control oil port and the fourth control oil port.
  • the low-pressure pumping control step includes: when only the first pressure oil port, the first control oil port, and the third control oil port have pressure oil passing through, the first hydraulic control check valve, the second hydraulic The control check valve, the third hydraulic control check valve and the fourth hydraulic control check valve are all in the reverse connection state, the fifth hydraulic control check valve, the sixth hydraulic control check valve, and the seventh hydraulic control check valve The valve and the eighth hydraulic control check valve are in the reverse closed state, the control oil at the first control port flows through the first hydraulic control single valve to the second three-position four-way reversing valve, and the second three-position four-way reversing valve When the valve is in the left position, the pressure oil at the third control port flows to the first spool valve through the second hydraulic control check valve.
  • the first spool valve is in the left position.
  • the three-position four-way reversing valve and the first slide valve flow to the rod cavity of the first cylinder and the first cartridge valve.
  • the control port of the first cartridge valve is pressurized oil, and the first cartridge valve is closed.
  • the high pressure oil pushes the piston of the first oil cylinder, the pressure oil in the rodless cavity of the first oil cylinder acts on the second cartridge valve and the second slide valve.
  • the second cartridge valve controls the oil port without pressure oil
  • the second cartridge valve opens, and the pressure oil in the rodless cavity of the second cylinder acts on the second cartridge valve and enters the first cartridge through the second cartridge valve.
  • the rodless cavity of the oil cylinder pushes the piston of the first oil cylinder to move, and the pressure oil in the rod cavity of the first oil cylinder passes through the first slide valve and the second three-position four-way reversing valve to the oil discharge port; when the third control oil When pressure oil alternately appears at the port and the fourth control oil port, the continuous movement of the first oil cylinder and the second oil cylinder is realized, thereby realizing low-pressure pumping.
  • the high-pressure pumping control step includes: when there is only the second pressure port, the first control port and the third control port have pressure oil passing through, the fifth hydraulic control check valve, the sixth hydraulic The control check valve, the seventh hydraulic control check valve and the eighth hydraulic control check valve are in the reverse connection state, the first hydraulic control check valve, the second hydraulic control check valve, and the third hydraulic control check valve And the fourth hydraulic control check valve are in the reverse closed state, the pressure oil at the first control port flows to the first three-position four-way reversing valve through the fifth hydraulic control check valve, and the pressure oil at the third control port Enter the second spool valve through the sixth hydraulic control check valve, the second spool valve is connected to the left position, and the pumped high-pressure oil input to the oil supply port passes through the first three-position four-way reversing valve, and the second spool valve flows to the second spool valve.
  • the rodless cavity of a cylinder and the second cartridge valve At this time, the control port of the second cartridge valve is pressurized oil, the second cartridge valve is closed, and the high pressure oil pushes the piston of the first cylinder to move.
  • the pressure oil in the rod cavity flows to the first cartridge valve and the first slide valve, and the second three-position four-way reversing valve, because the first hydraulic control check valve and the fourth hydraulic control check valve have no pressure oil,
  • the second three-position four-way reversing valve is in the closed state, the first cartridge valve controls the oil port without pressure oil, the first cartridge valve is in the open state, and the pressure oil in the rod cavity of the first cylinder flows to the second
  • the rod cavity of the oil cylinder pushes the piston of the second oil cylinder, and the pressure oil in the rodless cavity of the second oil cylinder flows to the second cartridge valve and the second slide valve, because the second cartridge valve control oil port is pressurized oil.
  • the second cartridge valve is closed, and the pressure oil flows to the oil discharge port through the second slide valve and the first three-position four-way reversing valve; when the fourth control port is pressure oil, it passes through the seventh hydraulic control one-way
  • the valve outputs pressure oil to the second spool valve, the second spool valve is connected to the right position, the high-pressure oil pumped into the oil supply port passes through the first three-position four-way reversing valve, and the second spool valve enters the rodless of the second cylinder Cavity, pushing the piston of the second oil cylinder to move, the pressure oil in the rod cavity of the second oil cylinder enters the rod cavity of the first oil cylinder through the first cartridge valve 5, pushing the piston of the first oil cylinder to move, and the rodless cavity of the first oil cylinder
  • the pressure oil in the medium passes through the second slide valve and the first three-position four-way reversing valve to the oil discharge port; when pressure oil alternates between the third control port and the fourth control port, the first oil cylinder and
  • FIG. 1 is a schematic diagram of the structural connection principle of the high and low voltage automatic switching control logic device of the embodiment of the present disclosure.
  • Concrete pump An energy conversion device that converts hydraulic energy into pressure energy of flowing concrete.
  • Main cylinder An energy conversion device that converts hydraulic energy into mechanical energy.
  • the main cylinder is connected to a concrete piston to convert hydraulic energy into concrete kinetic energy (potential energy).
  • Low-pressure pumping The working hydraulic oil enters the state where the main oil cylinder has a rod cavity to push the main oil cylinder to work.
  • High-pressure pumping The working hydraulic oil enters the rodless cavity of the main oil cylinder to push the main oil cylinder to work.
  • the present disclosure provides a high and low voltage automatic switching control logic device, which includes a first control logic unit, a second control logic unit, and a control oil port assembly.
  • the first control logic unit is connected with the second control logic unit through the control oil port assembly.
  • the control oil port assembly includes a first control oil port kz1, a second control oil port kz2, a third control oil port kz3, and a fourth control oil port kz4.
  • the first control logic unit includes a first pressure port Pd, a first hydraulic control check valve v1, a second hydraulic control check valve v2, a third hydraulic control check valve v3, a fourth hydraulic control check valve v4, and a second hydraulic control check valve v4.
  • a cartridge valve controls port P5.
  • the first pressure port Pd is respectively connected to the first cartridge valve control port P5, the control oil circuit of the first hydraulic control check valve v1, the control oil circuit of the second hydraulic control check valve v2, and the third hydraulic control check valve
  • the second control logic unit includes the second pressure port Pg, the fifth hydraulic control check valve v5, the sixth hydraulic control check valve v6, the seventh hydraulic control check valve v7, the eighth hydraulic control check valve v8 and the second hydraulic control check valve v5.
  • the second pressure port Pg is respectively connected to the second cartridge valve control port P6, the control circuit of the fifth hydraulic control check valve v5, the control circuit of the sixth hydraulic control check valve v6, and the seventh hydraulic control check valve.
  • the first control oil port kz1 is respectively connected to the oil outlet of the first hydraulic control check valve v1 and the oil outlet of the fifth hydraulic control check valve v5; the second control oil port kz2 is respectively connected to the fourth hydraulic control check valve v4
  • the oil outlet of and the oil outlet of the eighth hydraulic control check valve v8; the third control oil port kz3 is connected to the oil outlet of the second hydraulic control check valve v2 and the oil outlet of the sixth hydraulic control check valve v6.
  • Port; the fourth control oil port kz4 is respectively connected to the oil outlet of the third hydraulic control check valve v3 and the oil outlet of the seventh hydraulic control check valve v7.
  • the present disclosure also proposes a high and low pressure automatic switching control logic system, which includes a hydraulic system and a high and low pressure automatic switching control logic device.
  • the oil ports of the hydraulic system are respectively connected to the first control logic unit and the second control logic unit.
  • the second spool valve 4 is connected to the first three-position four-way reversing valve 1.
  • the first three-position four-way reversing valve 1 and the second three-position four-way reversing valve 2 are externally pumped with high pressure oil through the oil supply port P (also called P port).
  • the first three-position four-way reversing valve 1 is respectively connected to the oil inlet P11 of the fifth hydraulic control check valve v5 and the oil inlet P12 of the eighth hydraulic control check valve v8; the second three positions The four-way reversing valve 2 is connected to the oil inlet P21 of the first hydraulic control check valve v1 and the oil inlet P22 of the fourth hydraulic control check valve v4 respectively; the first slide valve 3 is connected to the second hydraulic control check valve respectively The oil inlet P31 of v2 and the oil inlet P32 of the third hydraulic control check valve v3; the second slide valve 4 is respectively connected to the oil inlet P41 of the sixth hydraulic control check valve v6 and the seventh hydraulic control check valve v7 ⁇ P42.
  • a circulating oil circuit for low-pressure pumping includes:
  • the pumped high-pressure oil input to the oil supply port P enters the rod cavity of the first cylinder 7 through the second three-position four-way reversing valve 2 and the first slide valve 3 in turn, and the pressure oil in the rodless cavity of the first cylinder 7 Enter the rodless cavity of the second cylinder 8 through the second cartridge valve 6, and the pressure oil in the rod cavity of the second cylinder 8 passes through the first slide valve 3 and the second three-position four-way reversing valve 2 to the oil discharge port T (also known as T port) output; the pumped high-pressure oil at the oil supply port P sequentially passes through the second three-position four-way reversing valve 2 and the first slide valve 3 into the rod cavity of the second cylinder 8, the second cylinder
  • the pressure oil in the rodless cavity of 8 enters the rodless cavity of the first cylinder 7 through the second cartridge valve 6, and the pressure oil in the rodless cavity of the first cylinder 7 passes through the first slide valve 3 and the second three-position four Pass the reversing valve 2 to the oil discharge
  • a circulating oil circuit for low-pressure pumping further includes:
  • Pressure oil passes through the first pressure port Pd and the first control port kz1, the first hydraulic control check valve v1, the second hydraulic control check valve v2, the third hydraulic control check valve v3 and the fourth hydraulic control check valve
  • the valve v4 is in the reverse connection state
  • the fifth hydraulic control check valve v5, the sixth hydraulic control check valve v6, the seventh hydraulic control check valve v7 and the eighth hydraulic control check valve v8 are all in the reverse direction
  • pressure oil alternately appears at the third control port kz3 and the fourth control port kz4; or
  • the first pressure port Pd and the second control port kz2 have pressure oil passing through, the first hydraulic control check valve v1, the second hydraulic control check valve v2, the third hydraulic control check valve v3 and the fourth hydraulic control check valve
  • the valve v4 is in the reverse connection state
  • the fifth hydraulic control check valve v5 the sixth hydraulic control check valve v6, the seventh hydraulic control check valve v7 and the eighth hydraulic control check valve v8 are all in the reverse direction
  • the third control port kz3 and the fourth control port kz4 alternately present pressure oil.
  • a circulating oil circuit for high-pressure pumping includes:
  • the pumped high-pressure oil input to the oil supply port P enters the rodless cavity of the first cylinder 7 through the first three-position four-way reversing valve 1 and the second slide valve 4 in turn, and the pressure oil in the rod cavity of the first cylinder 7 Enter the rod cavity of the second cylinder 8 through the first cartridge valve 5, and the pressure oil in the rodless cavity of the second cylinder 8 passes through the second slide valve 4 and the first three-position four-way reversing valve 1 to the oil discharge port T output; the pumped high-pressure oil at the oil supply port P passes through the first three-position four-way reversing valve 1 and the second slide valve 4 into the rodless cavity of the second cylinder 8, and into the rod cavity of the second cylinder 8 The pressure oil enters the rod cavity of the first cylinder 7 through the first cartridge valve 5, and the pressure oil in the rodless cavity of the first cylinder 7 passes through the second slide valve 4 and the first three-position four-way reversing valve 1 to Oil drain port T output.
  • a circulating oil circuit for high-pressure pumping further includes:
  • Pressure oil passes through the second pressure port Pg and the first control port kz1, the first hydraulic control check valve v1, the second hydraulic control check valve v2, the third hydraulic control check valve v3 and the fourth hydraulic control check valve
  • the valve v4 is in the reverse closed state
  • pressure oil alternately appears at the third control port kz3 and the fourth control port kz4; or
  • Pressure oil passes through the second pressure port Pg and the second control port kz2, the first hydraulic control check valve v1, the second hydraulic control check valve v2, the third hydraulic control check valve v3 and the fourth hydraulic control check valve.
  • the valve v4 is in the reverse closed state, the fifth hydraulic control check valve v5, the sixth hydraulic control check valve v6, the seventh hydraulic control check valve v7 and the eighth hydraulic control check valve v8 are all in the reverse connection.
  • the third control oil port kz3 and the fourth control oil port kz4 alternately appear pressure oil.
  • the hydraulic control check valves v1 to v8 are in the reverse connection state. If the first control port kz1, the second control port kz2, and the third If there is no pressure oil through the control port kz3 and the fourth control port kz4, no control oil will flow to the oil inlets p11, p12, p21, p22, p31, p32, p41 and p42, the first three-position four-way change The reversing valve 1 and the second three-position four-way reversing valve 2 are in the neutral state, pumping high-pressure oil is on standby at the oil supply port P, and the system is in a non-pumping state.
  • the low pressure pumping process includes:
  • the first control port kz1 and the third control port kz3 have pressure oil passing through, the first hydraulic control check valve v1, the second hydraulic control check valve v2, the third hydraulic control valve
  • the control check valve v3 and the fourth hydraulic control check valve v4 are both in the reverse connection state, the fifth hydraulic control check valve v5, the sixth hydraulic control check valve v6, the seventh hydraulic control check valve v7 and the The eight-liquid control check valve v8 is in the reverse closed state.
  • the control oil at the first control oil port kz1 flows to the second three-position four-way reversing valve 2 through the first hydraulic control single valve v1, and the second three-position four-way reversing valve 2 is connected in the left position.
  • the pressure oil at the third control oil port kz3 flows to the first spool valve 3 through the second hydraulic control check valve v2, and the first spool valve 3 is in the left position.
  • the pumped high-pressure oil input from the oil supply port P flows through the second three-position four-way reversing valve 2 and the first slide valve 3 to the rod cavity of the first cylinder 7 and the first cartridge valve 5.
  • the control oil port P5 of the first cartridge valve is pressurized oil, and the first cartridge valve 5 is closed.
  • the high-pressure oil pushes the piston of the first oil cylinder 7 to move, and the pressure oil of the rodless cavity of the first oil cylinder 7 acts on the second cartridge valve 6 and the second slide valve 4.
  • the second cartridge valve controls the pressure-free oil at port P6, and the second cartridge valve 6 opens.
  • the pressure oil in the rodless cavity of the first oil cylinder 7 enters the rodless cavity of the second oil cylinder 8 through the second cartridge valve 6 to push the piston to move.
  • the pressure oil in the rod cavity of the second cylinder 8 acts on the first cartridge valve 5 and the first slide valve 3.
  • the first cartridge valve 5 is in the closed state, the pressure oil in the rod cavity of the second cylinder 8 passes through the first slide valve 3 to the second three-position four-way reversing valve 2, and through the second three-position four-way reversing valve 2. To the drain port) output.
  • the first control port kz1 and the fourth control port kz4 are pressure oil
  • the pressure oil at the fourth control port kz4 flows to the first slide through the third hydraulic control check valve v3 Valve 3
  • the first spool valve 3 is connected to the right position.
  • the pumped high-pressure oil input from the oil supply port P passes through the second three-position four-way reversing valve 2, and the first slide valve 3 enters the rod cavity of the second cylinder 8, and the high-pressure oil pushes the piston of the second cylinder 8 to move.
  • the second cartridge valve controls the pressure-free oil at port P6, and the second cartridge valve 6 opens.
  • the pressure oil in the rodless cavity of the second oil cylinder 8 acts on the second cartridge valve 6 and enters the rodless cavity of the first oil cylinder 7 through the second cartridge valve 6 to push the piston of the first oil cylinder 7 to move.
  • the pressure oil in the rod cavity of the first oil cylinder 7 passes through the first slide valve 3 and the second three-position four-way reversing valve 2 to the oil discharge port T for output.
  • the high-pressure pumping control step includes:
  • the first control port kz1 and the third control port kz3 have pressure oil passing through, the fifth hydraulic control check valve v5, the sixth hydraulic control check valve v6, and the seventh hydraulic control port
  • the control check valve v7 and the eighth hydraulic control check valve v8 are in the reverse connection state, the first hydraulic control check valve v1, the second hydraulic control check valve v2, the third hydraulic control check valve v3 and the fourth hydraulic control check valve v3.
  • the hydraulic control check valve v4 is in the reverse closed state.
  • the pressure oil at the first control port kz1 flows through the fifth hydraulic control check valve v5 to the first three-position four-way reversing valve 1, and the pressure oil at the third control port kz3 enters through the sixth hydraulic control check valve v6
  • the second spool valve 4 and the second spool valve 4 are connected in the left position.
  • the pumped high-pressure oil input to the oil supply port P flows through the first three-position four-way reversing valve 1 and the second slide valve 4 to the rodless cavity of the first cylinder 7 and the second cartridge valve 6.
  • the second cartridge valve control port P6 is pressurized oil, and the second cartridge valve 6 is closed.
  • the high-pressure oil pushes the piston of the first cylinder 7 to move.
  • the pressure oil in the rod cavity of the first cylinder 7 flows to the first cartridge valve 5 and the first slide valve 3, and the second three-position four-way reversing valve 2. Because both the first hydraulic control check valve v1 and the fourth hydraulic control check valve v4 have no pressure oil, the second three-position four-way reversing valve 2 is in a closed state.
  • the first cartridge valve controls oil port P5 without pressure oil, and the first cartridge valve 5 is in an open state.
  • the pressure oil in the rod cavity of the first cylinder 7 flows to the rod cavity of the second cylinder 8 to push the piston of the second cylinder 8 to move.
  • the pressure oil in the rodless cavity of the second cylinder 8 flows to the second cartridge valve 6 and the second slide valve 4. Because the second cartridge valve control port P6 is pressurized oil, the second cartridge valve 6 is closed.
  • the pressure oil flows through the second slide valve 4 and the first three-position four-way reversing valve 1 to the oil discharge port T for output.
  • the fourth control oil port kz4 is pressure oil
  • the pressure oil is output to the second slide valve 4 through the seventh hydraulic control check valve v7, and the second slide valve 4 is connected to the right.
  • the pumped high-pressure oil input into the oil supply port P enters the rodless cavity of the second cylinder 8 through the first three-position four-way reversing valve 1 and the second slide valve 4, and pushes the piston of the second cylinder 8 to move.
  • the pressure oil in the rod cavity of the second oil cylinder 8 enters the rod cavity of the first oil cylinder 7 through the first cartridge valve 5 to push the piston of the first oil cylinder 7 to move.
  • the pressure oil in the rodless cavity of the first oil cylinder 7 passes through the second slide valve 4 and the first three-position four-way reversing valve 1 to the oil discharge port T and is output.
  • the hydraulic system includes four spool valves (ie, the first three-position four-way reversing valve 1, the second three-position four-way reversing valve 2, the first spool valve 3 and the second spool valve 4), 4 groups of hydraulic control check valves (the first hydraulic control check valve v1, the second hydraulic control check valve v2, the third hydraulic control check valve v3, the fourth hydraulic control check valve v4, the fifth hydraulic control check valve Valve v5, the sixth hydraulic control check valve v6, the seventh hydraulic control check valve v7 and the eighth hydraulic control check valve v8) and two cartridge valves (the first cartridge valve 5 and the second cartridge valve 6) ).
  • the arrangement of the spools of the four spool valves can be:
  • spool valves ie, the first three-position four-way reversing valve 1, the second three-position four-way reversing valve 2, the first spool valve 3, the second spool valve 4
  • control mechanism ie Four sets of hydraulically controlled check valves
  • the four spool valves (ie the first three-position four-way reversing valve 1, the second three-position four-way reversing valve 2, the first spool valve 3, the second spool valve 4) are arranged in two layers before and after the valve core, and the control mechanism ( That is, four groups of hydraulically controlled one-way valves are arranged at one end.
  • the logic relationship of low pressure pumping (oil in the small cavity of the cylinder) is: the first pressure port Pd is always connected to the pressure oil, the first control port kz1 or the second control port kz2 is always connected to the pressure oil, and the third control port kz3, The fourth control port kz4 acts on high pressure oil alternately, and the second pressure port Pg does not act on pressure oil.
  • the logic relationship of high pressure pumping (oil in the large cavity of the oil cylinder): the second pressure port Pg is always connected to the pressure oil, the first control port kz1 or the second control port kz2 is always connected to the pressure oil, the third control port kz3, the first The four control ports kz4 act as high pressure oil alternately, and the first pressure port Pd does not act as pressure oil.
  • the high and low pressure automatic switching control logic device of the embodiment of the present disclosure includes a control logic composed of four sets of hydraulic control check valves, a control port assembly and two cartridge valve control ports.
  • the hydraulic valve is internally controlled to reduce the number of solenoid valves and The number of pipelines is easy to integrate and save space.
  • the high-low pressure automatic switching control logic system of the embodiment of the present disclosure includes a hydraulic system and a high-low pressure automatic switching control logic device, through the aforementioned low-pressure pumping (oil in a small cavity of a cylinder) logic relationship and high pressure pumping (oil in a large cavity of a cylinder) Logical relationship to solve low-pressure pumping and high-pressure pumping as a whole.
  • the control method of the high and low pressure automatic switching control logic system of the embodiment of the present disclosure by designing a high and low pressure switching system with new control logic, enables the concrete pump to easily switch from low pressure to high pressure (or high pressure to low pressure) in a short time. Switch) so as to improve the construction efficiency of the concrete pump, reduce the construction intensity of workers, and improve the overall performance of the concrete pump.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

Sont divulgués, un dispositif et un système comprenant une logique de commande pour commuter automatiquement entre une haute et une basse pression, et un procédé de commande associé. Le dispositif présentant une logique de commande pour commuter automatiquement entre une haute et une basse pression comprend une première unité logique de commande, une seconde unité logique de commande et un ensemble orifice d'huile de commande. La première unité logique de commande est connectée à la seconde unité logique de commande au moyen de l'ensemble orifice d'huile de commande. Le système présentant une logique de commande pour commuter automatiquement entre une pression élevée et une basse pression comprend un système hydraulique et le dispositif présentant une logique de commande pour commuter automatiquement entre une pression élevée et une basse pression, et des orifices d'huile du système hydraulique sont respectivement reliés à la première unité logique de commande et à la seconde unité logique de commande. Le procédé de commande destiné au système présentant une logique de commande pour commuter automatiquement entre une haute et une basse pression comprend : une étape de commande de pompage à basse pression ; et une étape de commande de pompage à haute pression.
PCT/CN2020/133555 2020-03-04 2020-12-03 Dispositif et système comprenant une logique de commande pour commuter automatiquement entre une haute et une basse pression, et son procédé de commande WO2021174931A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010141774.1 2020-03-04
CN202010141774.1A CN111322281A (zh) 2020-03-04 2020-03-04 一种高低压自动切换控制逻辑装置、系统及其控制方法

Publications (1)

Publication Number Publication Date
WO2021174931A1 true WO2021174931A1 (fr) 2021-09-10

Family

ID=71171297

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/133555 WO2021174931A1 (fr) 2020-03-04 2020-12-03 Dispositif et système comprenant une logique de commande pour commuter automatiquement entre une haute et une basse pression, et son procédé de commande

Country Status (2)

Country Link
CN (1) CN111322281A (fr)
WO (1) WO2021174931A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111322281A (zh) * 2020-03-04 2020-06-23 徐州徐工施维英机械有限公司 一种高低压自动切换控制逻辑装置、系统及其控制方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6263188A (ja) * 1985-09-17 1987-03-19 Mitsubishi Heavy Ind Ltd コンクリ−トポンプのコンクリ−トピストン逆走防止装置
CN2166271Y (zh) * 1993-02-26 1994-05-25 阳泉矿务局煤炭科学研究所 一种多路液控联动换向阀
CN103836020A (zh) * 2014-03-21 2014-06-04 徐州徐工施维英机械有限公司 一种混凝土泵的高低压切换系统及混凝土泵
CN103994120B (zh) * 2014-06-07 2016-02-24 曲天智 一种液压支架推移油缸控制装置及其控制方法
CN106015136A (zh) * 2016-07-29 2016-10-12 徐州徐工铁路装备有限公司 一种多自由度工作装置及其综合控制系统
CN111322281A (zh) * 2020-03-04 2020-06-23 徐州徐工施维英机械有限公司 一种高低压自动切换控制逻辑装置、系统及其控制方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6263188A (ja) * 1985-09-17 1987-03-19 Mitsubishi Heavy Ind Ltd コンクリ−トポンプのコンクリ−トピストン逆走防止装置
CN2166271Y (zh) * 1993-02-26 1994-05-25 阳泉矿务局煤炭科学研究所 一种多路液控联动换向阀
CN103836020A (zh) * 2014-03-21 2014-06-04 徐州徐工施维英机械有限公司 一种混凝土泵的高低压切换系统及混凝土泵
CN103994120B (zh) * 2014-06-07 2016-02-24 曲天智 一种液压支架推移油缸控制装置及其控制方法
CN106015136A (zh) * 2016-07-29 2016-10-12 徐州徐工铁路装备有限公司 一种多自由度工作装置及其综合控制系统
CN111322281A (zh) * 2020-03-04 2020-06-23 徐州徐工施维英机械有限公司 一种高低压自动切换控制逻辑装置、系统及其控制方法

Also Published As

Publication number Publication date
CN111322281A (zh) 2020-06-23

Similar Documents

Publication Publication Date Title
CN108757624B (zh) 一种油缸溢流阀差动增速回路
CN102439306B (zh) 具有由电动液压阀联接于分开的外部端口的气缸的流体工作机
CN108488112B (zh) 大流量液压系统差动回路及其控制方法
WO2021174931A1 (fr) Dispositif et système comprenant une logique de commande pour commuter automatiquement entre une haute et une basse pression, et son procédé de commande
CN104564862A (zh) 一种组合式泵控缸电液控制系统
CN210949337U (zh) 一种自动高低压切换液压系统及其应用的设备
CN107524661B (zh) 一种齿轮齿条升降装置的液压系统
CN213116894U (zh) 一种高低压自动切换控制逻辑装置及其系统
CN108343649B (zh) 基于单侧出口节流控制阀组的负载口/排量独立控制系统
CN114955868A (zh) 负载口独立控制阀、起重机械液压系统及其工作方法
CN114704531A (zh) 一种液压中位浮动的集成阀及液压控制系统
CN114704532A (zh) 一种液压浮动式控制的集成阀及液压控制系统
CN218266562U (zh) 双缸控制液压回路
CN211259164U (zh) 高频响电液冲压系统
CN208595109U (zh) 一种油缸溢流阀差动增速回路
CN201225349Y (zh) 油缸往复器
CN114183426B (zh) 一种具有压力选择功能的再生式液压阀
CN218236329U (zh) 一种阀门电液驱动装置
CN210660801U (zh) 一种小型水轮机调速器模块化液压控制系统
CN111720389A (zh) 一种组合式液压势能再生系统
CN217873564U (zh) 用于驱动超临界co2压缩机的插装阀复合液压系统
KR101411234B1 (ko) 복동식 왕복가능 압력 부스터 및 그 작동방법
CN221278135U (zh) 一种单分流马达的救生艇吊液压同步系统
CN210461217U (zh) 高低压切换装置及泵送液压系统
CN211874852U (zh) 新型负载感应再生平衡阀装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20923478

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20923478

Country of ref document: EP

Kind code of ref document: A1