CN102235392A - Control device for pilot oil of cartridge valve - Google Patents
Control device for pilot oil of cartridge valve Download PDFInfo
- Publication number
- CN102235392A CN102235392A CN2011101336656A CN201110133665A CN102235392A CN 102235392 A CN102235392 A CN 102235392A CN 2011101336656 A CN2011101336656 A CN 2011101336656A CN 201110133665 A CN201110133665 A CN 201110133665A CN 102235392 A CN102235392 A CN 102235392A
- Authority
- CN
- China
- Prior art keywords
- valve
- guide oil
- pressure
- accumulator
- pilot oil
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The invention provides a control device for pilot oil of a cartridge valve, which comprises a pilot oil inlet and a pilot oil outlet, wherein the pilot oil inlet is connected with the pilot oil outlet by a shuttle valve, and is also connected with a pressure relay and an energy accumulator by a check valve; the pressure relay and the energy accumulator are connected with a solenoid directional valve by the check valve; and the solenoid directional valve is connected with an oil pump and a motor. In the control device, the oil pump and the motor are controlled by the pilot oil to charge liquid for the energy accumulator under the low pressure of the energy accumulator, so the cartridge valve still can run stably under the long-term low pressure of a system, the motor is also in the unloaded state during the normal running of the system, and energy consumption is low.
Description
Technical field
The present invention relates to the guide oil control field of cartridge valve, especially adopt the cartridge valve guide oil control gear on the driven by servomotor injection machine.
Background technique
Current, low-carbon energy-saving has become one of main direction of injection machine development.The all extensive uses on injection machine of various power-saving technologies comprise variable displacement pump hydraulic system and servo motor driving system etc.
In the injection machine industry, to adopt servo motor driving system, and use in the large scale computer of cartridge valve control oil channel, the control of cartridge valve guide oil becomes technological difficulties.Because servo motor driving system, actuating motor counter-rotating pressure release causes cartridge valve when system low-voltage, and action is unstable, easily produces misoperation, causes hidden danger to machine.
For above-mentioned situation, prior art has takes the guide to control the method that oil installs accumulator additional, and the method for taking independent hydraulically controlled oil circuit control is also arranged.But though install can take on a new look the greatly instability of system of accumulator additional, in that the user is low for a long time when press-fiting the mould debugging, accumulator still can cause machine malfunction to take place because of there not being the high pressure topping up, causes hidden danger for operator and use mould.Adopt independently guide's oil circuit controlling method, though the stability of a system is better, because control oil is in the high pressure relief state always, the whole system energy consumption is higher, has shortened the working life of Oil pump electrical machinery.
Summary of the invention
The present invention is for solving prior art injection machine servo electrical machinery system cartridge valve guide oil control technique imperfection, the higher technological deficiency of energy consumption, provide a kind of cartridge valve guide oil control gear: effectively realized the control of cartridge valve guide oil on the one hand, guaranteed the machine safe operation; Whole on the other hand cartridge valve guide oil control system is in operating on low voltage, and energy consumption is lower, has realized energy-conservation.
In order to achieve the above object, the technical solution adopted in the present invention is: a kind of cartridge valve guide oil control gear is provided, it comprises guide oil inlet opening and guide oil delivery outlet, described guide oil inlet opening and guide oil delivery outlet are communicated with, and are provided with accumulator between described guide oil inlet opening and the guide oil delivery outlet; Described guide oil inlet opening and guide oil delivery outlet are communicated with by shuttle valve, and described guide oil inlet opening is connected with the inlet of first one-way valve, and the outlet of described first one-way valve and described shuttle valve are communicated with; The Rendezvous Point of described first one-way valve outlet and described shuttle valve is connected with pressure relay and described accumulator; The Rendezvous Point of described pressure relay and accumulator is connected with the outlet of second one-way valve, and the inlet of described second one-way valve is connected with solenoid directional control valve; Be provided with relief valve between described second one-way valve and the solenoid directional control valve; Described solenoid directional control valve is connected with oil pump, and described oil pump is connected with motor.
Further, the Rendezvous Point of the outlet of described first one-way valve and shuttle valve is connected with pressure gauge.
In course of normal operation, pressure when the guide oil inlet opening is higher than the pressure that pressure relay is set, when also being higher than the pressure of fluid in the accumulator simultaneously, system oil pressure is by the guide oil inlet opening, give guide oil delivery outlet feed flow through shuttle valve, give accumulator high pressure topping up by first one-way valve simultaneously; Oil pump is through the direct draining of solenoid directional control valve, and empty load of motor moves.
Pressure in the guide oil inlet opening is lower than the pressure that pressure relay is set, when the pressure of fluid is higher than the pressure relay setting pressure in the accumulator, high pressure oil in the accumulator is given guide oil delivery outlet feed flow through shuttle valve, and oil pump is through the direct draining of solenoid directional control valve, and motor is no-load running also.
Under special circumstances, when the force value of guide oil inlet opening and accumulator all is lower than the force value of pressure relay setting, pressure relay normally opened contact closure, solenoid directional control valve must conduct, oil pump is through solenoid directional control valve and relief valve, give the accumulator that is in low-pressure state oil-filled by second one-way valve, give guide oil delivery outlet feed flow by shuttle valve again.
The present invention compares with prior art, and its effect is significantly significantly.Control oily Oil pump electrical machinery by setting up the guide, when accumulator low pressure it is carried out topping up, guaranteed cartridge valve operating stably as usual under the low pressure when system head, and motor also is in unloaded state during system's normal operation, energy consumption is lower.
Description of drawings
Fig. 1 is the structural representation of a kind of cartridge valve guide oil of the present invention control gear.
Embodiment
The present invention is described further below in conjunction with accompanying drawing.
Cartridge valve guide oil control gear as shown in Figure 1, guide oil inlet opening 1 is connected with guide oil delivery outlet 2 by shuttle valve 3; Guide oil inlet opening 1 also connects the inlet of first one-way valve 4, and the outlet of first one-way valve 4 and shuttle valve 3 are communicated with.The Rendezvous Point of first one-way valve 4 and shuttle valve 3 is connected accumulator 5 and pressure relay 6; The Rendezvous Point of first one-way valve 4 and shuttle valve 3 also is connected with a pressure gauge 12.The Rendezvous Point of accumulator 5 and pressure relay 6 is connected with the inlet of second one-way valve 7, and the outlet of second one-way valve 7 is connected with solenoid directional control valve 8, is provided with relief valve 9 between the solenoid directional control valve 8 and second one-way valve 7.Solenoid directional control valve 8 is connected with oil pump 10, is connected with motor 11 on the oil pump 10.Oil pump 10 is connected on the oil hydraulic cylinder 13.
In course of normal operation, pressure when guide oil inlet opening 1 is higher than the force value that pressure relay 6 is set, when being higher than the oil liquid pressure in the accumulator 5 simultaneously, system oil pressure is by guide oil inlet opening 1, give guide oil delivery outlet 2 feed flows through shuttle valve 3, give accumulator 5 topping ups by first one-way valve 4 simultaneously; Oil pump 10 is through solenoid directional control valve 8 direct drainings, motor 11 no-load runnings.
Pressure in guide oil inlet opening 1 is lower than the force value that pressure relay 6 is set, when the pressure of fluid is higher than pressure relay 6 setting pressures in the accumulator 5 simultaneously, the fluid of accumulator 5 is given guide oil delivery outlet 2 feed flows through shuttle valve 3, oil pump 10 is through solenoid directional control valve 8 direct drainings, also no-load running of motor 10.
Under special circumstances, when the force value of guide oil inlet opening 1 and accumulator 5 all is lower than the force value of pressure relay 6 settings, pressure relay 6 normally opened contact closures, solenoid directional control valve 8 must conduct, oil pump 10 is through solenoid directional control valve 8 and relief valve 9, give the accumulator 5 that is in low-pressure state oil-filled by second one-way valve 7, give guide oil delivery outlet 2 feed flows by shuttle valve 3 again, stable operation does as usual under the low pressure when having guaranteed system head.
Claims (2)
1. cartridge valve guide oil control gear, it comprises guide oil inlet opening and guide oil delivery outlet, described guide oil inlet opening and guide oil delivery outlet are communicated with, and are provided with accumulator between described guide oil inlet opening and the guide oil delivery outlet; It is characterized in that: described guide oil inlet opening and guide oil delivery outlet are communicated with by shuttle valve, and described guide oil inlet opening is connected with the inlet of first one-way valve, and the outlet of described first one-way valve and described shuttle valve are communicated with; The Rendezvous Point of described first one-way valve outlet and described shuttle valve is connected with pressure relay and described accumulator; The Rendezvous Point of described pressure relay and accumulator is connected with the outlet of second one-way valve, and the inlet of described second one-way valve is connected with solenoid directional control valve; Be provided with relief valve between described second one-way valve and the solenoid directional control valve; Described solenoid directional control valve is connected with oil pump, and described oil pump is connected with motor.
2. a kind of cartridge valve guide oil control gear as claimed in claim 1, it is characterized in that: the outlet of described first one-way valve and the Rendezvous Point of shuttle valve are connected with pressure gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101336656A CN102235392A (en) | 2011-05-20 | 2011-05-20 | Control device for pilot oil of cartridge valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101336656A CN102235392A (en) | 2011-05-20 | 2011-05-20 | Control device for pilot oil of cartridge valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102235392A true CN102235392A (en) | 2011-11-09 |
Family
ID=44886364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101336656A Pending CN102235392A (en) | 2011-05-20 | 2011-05-20 | Control device for pilot oil of cartridge valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102235392A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1372593A (en) * | 1970-11-19 | 1974-10-30 | Netstal Ag Maschf Giesserei | Control devices for hydraulically-operated piston units |
| US4823551A (en) * | 1984-12-28 | 1989-04-25 | Karl Hehl | Hydraulic control circuit for an injection molding with two loads driven by a pump |
| US20070086899A1 (en) * | 2002-12-09 | 2007-04-19 | Sommars Mark F | Fuel system with variable discharge pump |
| CN2925841Y (en) * | 2005-05-31 | 2007-07-25 | 佛山伊之密精密机械有限公司 | Oil-pressure servo controller of injection molding machine |
| CN201382029Y (en) * | 2009-03-03 | 2010-01-13 | 宁波市海达塑料机械有限公司 | Injection machine accumulator pressurizing system |
| CN101870160A (en) * | 2010-03-30 | 2010-10-27 | 浙江大学 | Pump-valve compound control hydraulic system for injection molding machine and control method thereof |
| CN201800214U (en) * | 2010-09-15 | 2011-04-20 | 广东佳明机器有限公司 | External control loop of injection molding machine with servo system |
| CN202100552U (en) * | 2011-05-20 | 2012-01-04 | 上海光塑机械制造有限公司 | Pilot oil control device of cartridge valve |
-
2011
- 2011-05-20 CN CN2011101336656A patent/CN102235392A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1372593A (en) * | 1970-11-19 | 1974-10-30 | Netstal Ag Maschf Giesserei | Control devices for hydraulically-operated piston units |
| US4823551A (en) * | 1984-12-28 | 1989-04-25 | Karl Hehl | Hydraulic control circuit for an injection molding with two loads driven by a pump |
| US20070086899A1 (en) * | 2002-12-09 | 2007-04-19 | Sommars Mark F | Fuel system with variable discharge pump |
| CN2925841Y (en) * | 2005-05-31 | 2007-07-25 | 佛山伊之密精密机械有限公司 | Oil-pressure servo controller of injection molding machine |
| CN201382029Y (en) * | 2009-03-03 | 2010-01-13 | 宁波市海达塑料机械有限公司 | Injection machine accumulator pressurizing system |
| CN101870160A (en) * | 2010-03-30 | 2010-10-27 | 浙江大学 | Pump-valve compound control hydraulic system for injection molding machine and control method thereof |
| CN201800214U (en) * | 2010-09-15 | 2011-04-20 | 广东佳明机器有限公司 | External control loop of injection molding machine with servo system |
| CN202100552U (en) * | 2011-05-20 | 2012-01-04 | 上海光塑机械制造有限公司 | Pilot oil control device of cartridge valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201649155U (en) | Rotary decelerating brake energy recovery system of hydraulic excavator | |
| CN207762060U (en) | A kind of overhead working truck system | |
| CN101736771A (en) | Rotary decelerating and braking energy recovery system of hydraulic excavator | |
| CN201284201Y (en) | Hoist hydraulic control system of crane | |
| CN203532360U (en) | Hydraulic pressure boosting system | |
| CN202129497U (en) | Hydraulic control system of gate type plate shearing machine | |
| CN102482867A (en) | Control system for hybrid construction machinery | |
| CN104632794A (en) | Electro-hydraulic servo system of direct drive type hydraulic hoist | |
| CN101691877B (en) | Servo motor control-based multi-pump combination controlled hydraulic power system | |
| CN104989690B (en) | Overload relief valve | |
| CN105179335A (en) | Hydraulic steering engine control system | |
| CN104929992A (en) | Energy-saving design method for variable-load servo control system | |
| CN108383039A (en) | A kind of energy-saving stepping type lifter structure hydraulic control system | |
| CN202100552U (en) | Pilot oil control device of cartridge valve | |
| CN202194873U (en) | Servo pressure maintaining and speed regulation hydraulic circuit | |
| CN202833367U (en) | Mortar pump hydraulic system and mortar pump | |
| CN202116932U (en) | Hydraulic system of pulp package pressing machine | |
| CN103727078B (en) | Crane and hydraulic system thereof | |
| CN103661922B (en) | A kind of servo control mechanism electricity consumption combustion gas mixing power set | |
| CN202556705U (en) | Pressure power-off protection system for applying high-pressure energy accumulator on injection molding machine | |
| CN102235392A (en) | Control device for pilot oil of cartridge valve | |
| CN102705211B (en) | A kind of variable pump small displacement and little pressure control loop and control method thereof | |
| CN112012972B (en) | Pilot control oil way and control method for super-tonnage excavator | |
| CN102962972B (en) | Hydraulic system of injection molding machine with servo pump | |
| CN102032225A (en) | Hydraulic system of continuous oil pipe radial drilling equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111109 |