CN109723694A - Electric control multi-way valve - Google Patents
Electric control multi-way valve Download PDFInfo
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- CN109723694A CN109723694A CN201910094088.0A CN201910094088A CN109723694A CN 109723694 A CN109723694 A CN 109723694A CN 201910094088 A CN201910094088 A CN 201910094088A CN 109723694 A CN109723694 A CN 109723694A
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- valve
- oil
- valve body
- guide
- electric control
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Abstract
The invention discloses a kind of electric control multi-way valves, belong to technical field of engineering machinery, the electric control multi-way valve, including at least two reversing units being connected between the oil inlet of valve body and corresponding actuator port, the reversing unit includes main valve plug；First conductive proportional pressure-reducing valve is equipped between two control terminals and the oil outlet of guide's pressure reducing valve of the main valve plug；The oil inlet of guide's pressure reducing valve is connected with the oil inlet of the valve body.The present invention can solve the problem that existing electric control multi-way valve pilot line present in construction machinery hydraulic system is more, structure is complicated, at high cost and difficult to install.
Description
Technical field
The present invention relates to technical field of engineering machinery, especially a kind of automatically controlled multichannel for construction machinery hydraulic system
Valve.
Background technique
Electric control multi-way valve is a kind of electric-control system by engineering machinery being widely used in construction machinery hydraulic system
Its commutation is controlled, the hydraulic oil in hydraulic system is enabled to control the direction of motion of actuator and the device of speed；A kind of automatically controlled multichannel
Valve, including the valve body with multiple reversing units, these reversing units be connected to the oil inlet of valve body with it is corresponding
Between actuator port；Valve body also has guide's oil inlet, guide's oil return opening and oil return opening；Each reversing unit includes
Main valve plug is equipped with first conductive proportional pressure-reducing valve, guide between two control terminals and guide's oil inlet of each main valve plug
The oil return opening of electric proportional pressure-reducing valve is connected with guide's oil return opening of valve body, and main valve plug is connected with the oil return opening of valve body；
Guide's oil inlet is connected by the guide's delivery valve being located in guide's oil circuit with guide's oil pump；The oil inlet passes through master
Oil circuit is connected with work oil pump；Guide's oil return opening, the oil return opening of valve body are connected with fuel tank.When work, pass through automatically controlled system
It unites the size of current of output, controls electric proportional pressure-reducing valve output pilot pressure oil to the commutation of control bound core, reach control
The direction of motion of actuator and the purpose of speed；However in practical application, due to the pressure of the pressure ratio working connection of guide's oil circuit
It is much smaller, therefore first conductive proportional pressure-reducing valve need to provide guide oil by guide's oil pump through guide's oil inlet, to cause guide
The problem that pipeline is more, structure is complicated, at high cost and difficult to install.
Summary of the invention
The present invention provides a kind of electric control multi-way valve, which can solve existing electric control multi-way valve in engineering machinery
The problem that pilot line present in hydraulic system is more, structure is complicated, at high cost and difficult to install.
To solve the above-mentioned problems, the technical scheme adopted by the invention is that: this electric control multi-way valve, including be connected to valve
At least two reversing units between the oil inlet of ontology and corresponding actuator port, the reversing unit include main valve plug；Institute
It states and is equipped with first conductive proportional pressure-reducing valve between two control terminals of main valve plug and the oil outlet of guide's pressure reducing valve；The guide subtracts
The oil inlet of pressure valve is connected with the oil inlet of the valve body.
In above-mentioned technical proposal, more specific technical solution may also is that the oil outlet of guide's pressure reducing valve with it is described
Precursor overflow valve is equipped between the oil return opening of valve body.
It is further: to be equipped between the pressure compensation hydraulic fluid port of the main valve plug and the load-transducing hydraulic fluid port of the valve body more
Road valve compensation piston.
It is further: main safety valve is equipped between the oil inlet and oil return opening of the valve body；The load of the valve body
It senses and is equipped with load sensing overflow valve between hydraulic fluid port and oil return opening.
Further: the oil inlet of the valve body is connected with the oil outlet of oil pump, the actuator port of the valve body
It is connected with the oil inlet of corresponding actuator, the load-transducing hydraulic fluid port of the valve body and the load-transducing hydraulic fluid port of the oil pump
It is connected.
By adopting the above-described technical solution, compared with prior art, the present invention has the following advantages:
1, due to being equipped between two control terminals and the oil outlet of guide's pressure reducing valve of each main valve plug of this electric control multi-way valve
First conduction proportional pressure-reducing valve；The oil inlet of guide's pressure reducing valve is connected with the oil inlet of valve body；When work, from valve body oil inlet
Pressure value needed for the pressure oil of the high pressure values of mouth input is down to guide's oil circuit after guide's pressure reducing valve, using electric ratio
Pressure reducing valve is output to two control terminals of respective main valve plug, thus the commutation of control bound core, pilot oil source is from work oil pump
It chooses, optimizes complete machine in this way, guide's oil circuit can be integrated in valve body without using guide's delivery valve and guide's oil pump
System pipeline is not only simple in structure, is easy for installation and reduce cost.
2, due between the oil outlet of guide's pressure reducing valve and the oil return opening of valve body be equipped with precursor overflow valve, play prevent into
Enter the effect of the first hypertonia of the pilot pressure oil of conductive proportional pressure-reducing valve.
3, due to being equipped with main safety valve between the oil inlet of valve body and oil return opening；The load-transducing hydraulic fluid port of valve body with return
Load sensing overflow valve is equipped between hydraulic fluid port；Play the role of the overload protection of working connection and pump intake pressure.
Detailed description of the invention
Fig. 1 is the hydraulic schematic diagram of valve body of the present invention.
Fig. 2 is the connection schematic diagram of valve body of the present invention and work oil pump and fuel tank.
Specific embodiment
The present invention will be further described below with reference to the accompanying drawings:
Embodiment one
Electric control multi-way valve shown in FIG. 1, including with oil inlet P, oil return inlet T, guide's oil return inlet T 2, load-transducing hydraulic fluid port Ls and
The valve body I of actuator port A1, B1, A2, B2；There are two reversing units, in valve body I oil inlet P and actuator port A1, B1 it
Between be equipped with reversing unit I 1, reversing unit I 2 is equipped in valve body I between oil inlet P and actuator port A2, B2；Reversing unit I 1
It include main valve plug 1 with reversing unit I 2；Between two control terminals of each main valve plug 1 and the oil outlet 6O of guide's pressure reducing valve 6
It is equipped with first conductive proportional pressure-reducing valve 2；The oil inlet 6P of guide's pressure reducing valve 6 is connected with the oil inlet P of valve body I；Guide subtracts
Precursor overflow valve 7 is equipped between the oil outlet 6O of pressure valve 6 and the oil return inlet T of valve body I；The pressure compensation oil of each main valve plug 1
Multi-way valve compensating piston 4 is equipped between mouth and the load-transducing hydraulic fluid port Ls of valve body I；The oil inlet P and oil return opening of valve body I
Main safety valve 5 is equipped between T；Load sensing overflow valve 3 is equipped between the load-transducing hydraulic fluid port Ls and oil return inlet T of valve body I；First
The oil return opening of conductive proportional pressure-reducing valve 2 is connect with guide's oil return inlet T 2 of valve body I；The oil return opening of main valve plug 1 and valve body I
Oil return inlet T is connected.
As shown in Fig. 2, the oil inlet P of valve body I is connected with the oil outlet 8O of work oil pump 8, the working oil of valve body I
Mouth A1, B1, A2, B2 are connected with the oil inlet of corresponding actuator (not shown), the load-transducing hydraulic fluid port Ls and work of valve body I
The load-transducing hydraulic fluid port for making oil pump 8 is connected, the guide's oil return inlet T 2 and oil return inlet T connected tank 9 of valve body I.
When work, the pressure oil of the high pressure values inputted from valve body oil inlet is down to guide oil after guide's pressure reducing valve
Pressure value needed for road is output to two control terminals of respective main valve plug using electric proportional pressure-reducing valve, thus control bound
The commutation of core, pilot oil source is chosen from work oil pump, without using guide's delivery valve and guide's oil pump, in this way, guide's oil circuit can
It is integrated in valve body, optimizes machine system pipeline, is not only simple in structure, is easy for installation and reduce engineering machinery
Production cost.
Embodiment two
There are four reversing units；Remaining is the same as example 1.
Claims (5)
1. a kind of electric control multi-way valve, at least two including being connected between the oil inlet of valve body and corresponding actuator port change
To unit, the reversing unit includes main valve plug；It is characterized by: two control terminals of the main valve plug and guide's pressure reducing valve
First conductive proportional pressure-reducing valve is equipped between oil outlet；The oil inlet phase of the oil inlet of guide's pressure reducing valve and the valve body
Connection.
2. electric control multi-way valve according to claim 1, it is characterised in that: the oil outlet and the valve of guide's pressure reducing valve
Precursor overflow valve is equipped between the oil return opening of ontology.
3. electric control multi-way valve according to claim 1 or 2, it is characterised in that: the pressure compensation hydraulic fluid port of the main valve plug with
Multi-way valve compensating piston is equipped between the load-transducing hydraulic fluid port of the valve body.
4. electric control multi-way valve according to claim 3, it is characterised in that: between the oil inlet and oil return opening of the valve body
Equipped with main safety valve；Load sensing overflow valve is equipped between the load-transducing hydraulic fluid port and oil return opening of the valve body.
5. electric control multi-way valve according to claim 4, it is characterised in that: the oil inlet of the valve body and the oil pump that works
Oil outlet is connected, and the actuator port of the valve body is connected with the oil inlet of corresponding actuator, and the valve body is born
Sensing hydraulic fluid port is carried to be connected with the load-transducing hydraulic fluid port of the work oil pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910094088.0A CN109723694A (en) | 2019-01-30 | 2019-01-30 | Electric control multi-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910094088.0A CN109723694A (en) | 2019-01-30 | 2019-01-30 | Electric control multi-way valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109723694A true CN109723694A (en) | 2019-05-07 |
Family
ID=66300381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910094088.0A Pending CN109723694A (en) | 2019-01-30 | 2019-01-30 | Electric control multi-way valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109723694A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110925252A (en) * | 2019-11-18 | 2020-03-27 | 中联重科股份有限公司 | Integrated multi-way valve, lifting hydraulic control system and crane |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110057398A (en) * | 2009-11-24 | 2011-06-01 | 현대중공업 주식회사 | Composition of positive control system for construction equipment through the rcv stroke sensing |
| CN103047208A (en) * | 2012-12-27 | 2013-04-17 | 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 | Load-sensitive electro-hydraulic proportional multi-way valve |
| CN104925685A (en) * | 2015-06-30 | 2015-09-23 | 中国船舶重工集团公司第七一九研究所 | Winch hydraulic system controlling guide rope through stepless speed regulating constant tension |
| CN106321541A (en) * | 2016-08-30 | 2017-01-11 | 中煤科工集团西安研究院有限公司 | Electric-hydraulic double-control hydraulic system and method for vehicle-mounted drilling machine |
| CN206299631U (en) * | 2016-12-20 | 2017-07-04 | 湖南鸿辉科技有限公司 | A kind of garbage-compressing control integral multitandem valve |
-
2019
- 2019-01-30 CN CN201910094088.0A patent/CN109723694A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110057398A (en) * | 2009-11-24 | 2011-06-01 | 현대중공업 주식회사 | Composition of positive control system for construction equipment through the rcv stroke sensing |
| CN103047208A (en) * | 2012-12-27 | 2013-04-17 | 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 | Load-sensitive electro-hydraulic proportional multi-way valve |
| CN104925685A (en) * | 2015-06-30 | 2015-09-23 | 中国船舶重工集团公司第七一九研究所 | Winch hydraulic system controlling guide rope through stepless speed regulating constant tension |
| CN106321541A (en) * | 2016-08-30 | 2017-01-11 | 中煤科工集团西安研究院有限公司 | Electric-hydraulic double-control hydraulic system and method for vehicle-mounted drilling machine |
| CN206299631U (en) * | 2016-12-20 | 2017-07-04 | 湖南鸿辉科技有限公司 | A kind of garbage-compressing control integral multitandem valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110925252A (en) * | 2019-11-18 | 2020-03-27 | 中联重科股份有限公司 | Integrated multi-way valve, lifting hydraulic control system and crane |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20190507 |