CN209430514U - Multi-way valve and electric control system - Google Patents
Multi-way valve and electric control system Download PDFInfo
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- CN209430514U CN209430514U CN201822131000.1U CN201822131000U CN209430514U CN 209430514 U CN209430514 U CN 209430514U CN 201822131000 U CN201822131000 U CN 201822131000U CN 209430514 U CN209430514 U CN 209430514U
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Abstract
The utility model discloses a multi-way valve and an electric control system, wherein the multi-way valve comprises a first valve body and a second valve body; in the first valve body, the first oil inlet of first oil feed return circuit sets up the bypass overflow valve, falls into two the tunnel: a first straight walking valve is arranged on one way of the head joint and is connected to a second working joint through an opening A of the first straight walking valve; a third working connection, a fourth working connection and a fifth working connection are connected in parallel below the other path, and a first bypass proportion neutral unloading valve is arranged in the tail connection; the second oil inlet loop and the first oil inlet loop share the same bypass overflow valve; the second oil inlet loop is divided into two paths: one path is directly connected with a sixth working joint of the second valve body, the other path is connected with a seventh working joint, an eighth working joint, a ninth working joint and a tenth working joint in parallel from a port B of the first joint linear walking valve to the second valve body, and a second bypass proportion neutral unloading valve is arranged at the tail joint of the second valve body; simple structure, the reliability is high, makes actuating mechanism more coordinate.
Description
Technical field
The utility model belongs to technical field of engineering machinery, is related to a kind of automatically controlled positive flow system, in particular to a kind of more
Road valve and electric-control system.
Background technique
Engineering, building, mine, etc. industries movable hydraulic it is mechanical, more executing agencies are generally required in operation process
Mutually coordinated movement forms the mechanical different types of control system of movable hydraulic thus.
Current load sensitive system mostly uses secon-dary pressure compensation system, and load feedback signal is anti-after work connection is opened
Presenting actuator port pressure has certain delay from system feedback transmitting to change the pivot angle of pump to recuperation valve and main pump.It is negative
It carries sensory system at work, causes executing agency to be shaken vulnerable to load sudden change.The pressure that load sensitive system uses is mended
Compensation structure keeps valve body structure complicated, high failure rate, and maintenance cost is big.
Current minus flow system is using bypass circulation feedback pressure to main pump swinging angle control mechanism, and negative-feedback pressure is in work
Make to gradually become smaller after connection is opened, to change the pivot angle of main pump, has certain delay from system feedback transmitting.Minus flow is in weight
It easily causes the high-end movement velocity of pressure slow when carrying work, keeps executing agency's movement uncoordinated.
The prior art has the following deficiencies:
Currently used load sensitive system and minus flow system mostly have the following problems using upper: (1) main pump connects
The signal received lags behind valve mostly, keeps the response of system slower.(2) feedback signal is connected to load channel, is easily caused negative
Carrying pressure oscillation causes discharge of main pump to change.(3) when heavy duty is excavated, often multithread is low to loading for minus flow flow system flow
Side causes the movement of high load executing agency slow.
And currently used hydraulic control positive flow also all has the following problems:
(1) pilot pressure signal acquired by pressure sensor need to export again the row of control pump by controller processing
Amount, whole process keep the response of system slower.
(2) the pilot-controlled working connection used is mostly negative feedback structure work connection, joins the negative of core by each work at middle position
Feedback channel carry out off-load, but in control process main pump pressure off-load by stem position opening degree influenced cannot timely off-load,
Easily cause reversing impact.
(3) the more integrated pressure-gradient control valves of the automatically controlled work connection used and logical circuit pressure detecting, pressure switch is vulnerable to logic
Loop switch and damage, reduce the reliability of system.
(4) it is difficult that control algolithm is added when double spool controls, it is more difficult to realize executing agency in one action or composite move
Start stationarity.
Utility model content
Purpose: in order to overcome the deficiencies in the prior art, the utility model provides a kind of multi-way valve and electric-control system.
Technical solution: in order to solve the above technical problems, the technical solution adopted by the utility model is:
A kind of multi-way valve, which is characterized in that including the first valve body and the second valve body；
First valve body includes vent relief valve, the first straight travel valve, the second work connection, third work connection, the
Four work join, the 5th work joins, position unloading valve in the first bypass ratio；
Second valve body includes the 6th work connection, the 7th work connection, the 8th work connection, the 9th work connection, the tenth work
Position unloading valve in connection, the second bypass ratio；
Vent relief valve is arranged in first oil inlet in the first oil inlet circuit, is divided into two-way through vent relief valve inner flow passage:
The first straight travel valve is arranged in first all the way, and is joined by A mouthfuls of the first straight travel valve to the second work；Under another way
Face parallel connection third work connection, the 4th work connection, the 5th work connection, tail connection are provided with position unloading valve in the first bypass ratio, play
First valve body pressure unloading function；
Second oil inlet circuit and the first oil inlet circuit share same vent relief valve；Second oil inlet circuit is divided into two-way: one
Road is directly connected to the 6th work connection of the second valve body, in addition in parallel to the second valve body by B mouthfuls of the first straight travel valve all the way
7th work connection, the 8th work connection, the 9th work connection, the tenth work connection, tail connection are provided with position unloading valve in the second bypass ratio,
Play the second valve body pressure unloading function；
First straight travel valve is two four-way direction valves；
The second work connection, third work connection, the 4th work connection, the 5th work connection, the 7th work connection, the 8th work
Connection, the 9th work connection, the tenth work connection are all made of and close center Median Function, include a 3-position 4-way proportional direction valve；
The 6th work connection is using the 3-position 4-way proportional direction valve for closing center Median Function or opens center middle-position machine
Three six logical proportional reversing valves of energy.
Further, three six logical proportional reversing valves for opening center Median Function are used when the 6th work joins, it is described
6th work connection open center oil circuit with the 7th work connection, the 8th work connection, the 9th work connection, the tenth work connection oil inlet company
It connects.
Further, first oil inlet in the import of the vent relief valve and the first oil inlet circuit, the second oil inlet are returned
Second oil inlet on road is all connected with, and the oil return opening of vent relief valve is connected to total oil return opening；It is furthermore preferred that the first oil inlet oil inlet
Check valve is set between bypass and vent relief valve, check valve is set between the second oil inlet oil inlet bypass and vent relief valve.
First oil inlet in the first straight travel valve import and the first oil inlet circuit, the second oil inlet circuit the
Two oil inlets are all connected with, and outlet A is connect with the second work connection import, export B and the second valve body the 7th work connection, the 8th work
The import connection of connection, the 9th work connection, the tenth work connection.
Further, it is respectively equipped between third work connection, the 4th work connection, the 5th work connection and the first oil inlet circuit
First check valve, second one-way valve, third check valve；
It is single that the 4th is respectively arranged between the 7th work connection, the 9th work connection, the tenth work connection and the second oil inlet circuit
To valve, the 5th check valve, the 6th check valve；For preventing executing agency's oil liquid reflux to other executing agency.
Further, third work connection further includes the first holding valve, the first logic control valve, the first overflow valve, the
Two overflow valves；
The first holding valve import is connect with B mouthfuls of connection of third work, and outlet is connect with executing agency's actuator port；Institute
The the first logic control valve import stated is connect with the feedback port of the first holding valve, and outlet is connected to total oil return opening；Described first
Overflow valve import keeps valve outlet in parallel with first, and outlet is connected to total oil return opening；The second overflow valve import and third
Work connection actuator port A is in parallel, and outlet is connected to total oil return opening.
Further, the 4th work connection further includes third overflow valve, the 4th overflow valve；The third overflow valve into
Mouth is in parallel with the 4th work connection actuator port A, and outlet is connected to total oil return opening；The 4th overflow valve import and the 4th work
It is in parallel to join actuator port B, outlet is connected to total oil return opening.
Further, the 5th work connection includes the second holding valve, the second logic control valve, the 5th overflow valve；It is described
Second keep valve, import connect with the 5th A mouthfuls of work connection, exports and connect with executing agency actuator port；Described second is patrolled
It collects control valve import to connect with the feedback port of the second holding valve, outlet is connected to total oil return opening；The 5th overflow valve import
Keep valve outlet in parallel with second, outlet is connected to total oil return opening.
Further, the tenth work connection further includes third logic control valve, the 6th overflow valve, has been used for oil cylinder safety
It protects and prevents being emptied function；The third logic control valve import is connect with the oil return opening of the tenth work connection, outlet and total oil return
Mouth connection, control mouth are connect with the A mouth of the tenth work connection；The 6th overflow valve import joins actuator port A with the tenth work
Parallel connection, outlet are connected to total oil return opening.
Further, confluence passage is provided between first valve body and the second valve body；The confluence passage are as follows:
8th B mouthfuls of work connection is connected to the second one-way valve before the 4th work connection import；
8th A mouthfuls of work connection is connected to B mouthfuls of connection of third work；
Tenth B mouthfuls of work connection is connected to the 5th A mouthfuls of work connection；
Tenth A mouthfuls of work connection is connected to the 5th B mouthfuls of work connection；
When scraper bowl collaborates to activate, the second main pump oil liquid joins right position commutation by the 8th work and oil liquid is supplied to the 4th work
The import of connection；
When swing arm, which rises, to be activated, oil liquid is supplied to third work by the 8th work connection left position commutation by the second main pump oil liquid
The actuator port of connection；
When putting activation outside dipper, oil liquid is supplied to the 5th work by the tenth work connection left position commutation by the second main pump oil liquid
The actuator port of connection；
When receiving activation in dipper, the first main pump oil liquid is supplied to by the first main pump oil liquid by the 5th work connection left position commutation
The actuator port of tenth work connection.
On the one hand, the utility model also provides a kind of electric-control system, it is characterised in that: including above-mentioned multi-way valve.
Further, the electric-control system is divided into work system of getting on the bus with running gear of getting off, and work system of getting on the bus includes
Third work connection, the 4th work connection, the 5th work connection, the 8th work connection, the 9th work connection, the tenth work connection；It gets off Running System
System includes the second work connection, the 6th work connection；
First valve body the first oil inlet circuit joins position unloading valve in the first bypass ratio of setting, the first valve body at middle position in tail
First oil inlet circuit off-load；Second valve body the second oil inlet circuit joins position unloading valve in the second bypass ratio of setting in tail, in middle position
When second valve body the second oil inlet circuit off-load；
The actuator port B setting first that third work joins keeps valve, and the first holding valve is normally closed when position in third work connection, the
When three work connection left position activation, feeding back to first holding valve one end by the first oil inlet circuit pressure makes the first holding Vavle switching extremely
Normally open position, oil liquid enter executing agency's working hole；The first logic is activated by electric signal when third work joins the activation of right position
Control valve makes an end pressure of the first holding valve keep Vavle switching to normally open position by damping off-load to oil return line, first, holds
Row mechanism oil liquid flows to total oil return opening by third work connection；
The actuator port A setting second that 5th work joins keeps valve, and the second holding valve is normally closed when position in the 5th work connection, the
Three work, which feed back to second holding valve one end by the first oil inlet circuit pressure when joining the activation of right position, makes the second holding Vavle switching extremely
Normally open position, oil liquid enter executing agency's working hole；The second logic is activated by electric signal when the 5th work connection left position activation
Control valve makes an end pressure of the second holding valve keep Vavle switching to normally open position by damping off-load to oil return line, second, holds
Row mechanism oil liquid flows to total oil return opening by the 5th work connection；
Work system of getting on the bus and get off running gear compound work when, automatically controlled cut is carried out by the first straight travel valve
It changes.
On the other hand, the utility model also provides a kind of automatically controlled positive stream amount control method characterized by comprising
Obtain the handle signal of electric control handle；
Handle signal is parsed, and is converted into electric current；
On the one hand, to electric current after signal processing, corresponding proportional pressure-reducing valve is sent by current signal, control corresponds to
Work connection pilot pressure, to control the opening degree of corresponding work connection；
On the other hand, flow needed for work joins is calculated according to electric current, flow needed for joining according to each work obtains needed for pump
Flow；It show that pump discharge controls electric current according to flow rate calculation needed for pumping, then sends control current control pump pivot angle, make to pump defeated
Corresponding flow joins to work out.
The utility model has the advantages that multi-way valve provided by the utility model and electric-control system, have the advantage that
(1) multi-way valve can be such that the structure of valve designs simpler, it is easier to casting and processing, cost without feedback channel
It is greatly lowered.Main valve loop control logic reduces, and reliability is improved, and cost also reduces.
(2) during composite move, coordinate executing agency more by logical circuit setting, it is especially prominent under heavy duty.
Low valve core opening degree is loaded by automatically controlled reduce when heavy duty work, increases its back pressure, the movement of high load side cylinder will be big
Amplitude is promoted.
(3) pump responds faster with valve synchronous starting system, can be according to each executing agency's demand additionally by control algolithm
Control pump delay start or second spool delay start.
(4) displacement control of main pump is directed to pilot handle, and external interference link reduces, and executing agency moves more
Steadily, system robustness is higher.
(5) power control pumped derives from electrical control, can be reduced or remitted at work because the influence of mechanical output spring causes
With increasing for pressure, power is reduced.
Detailed description of the invention
Fig. 1 is the multi-way valve structural schematic diagram of embodiment 1；
Fig. 2 is the multi-way valve structural schematic diagram of embodiment 2；
Fig. 3 is the electrohydraulic control system electric logic control figure of embodiment.
In figure: the first valve body 1, vent relief valve 11, the first straight travel valve 12, second work connection 13, third work
Position unloading valve 17 in the 15, the 5th work the 16, first bypass ratio of connection of the 14, the 4th work connection of connection；
Second valve body 2, the 23, the 9th work the 24, the tenth work of connection of the 22, the 8th work connection of the 21, the 7th work connection of the 6th work connection
Make position unloading valve 26 in the 25, second bypass ratio of connection；
First check valve 141, first keeps valve 142, the first logic control valve 143, the first overflow valve 144, the second overflow
Valve 145；
Second one-way valve 151, third overflow valve 152, the 4th overflow valve 153；
Third check valve 161, second keeps valve 162, the second logic control valve 163, the 5th overflow valve 164；
4th check valve 221, the 5th check valve 241, the 6th check valve 251, third logic control valve 252, the 6th overflow
Valve 253.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to this is practical
Novel and its application or any restrictions used.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, is fallen within the protection scope of the utility model.
Unless specifically stated otherwise, positioned opposite, the digital table of the component and step that otherwise illustrate in these embodiments
Up to the unlimited the scope of the utility model processed of formula and numerical value.Simultaneously, it should be appreciated that for ease of description, each shown in attached drawing
The size of a part is not to draw according to actual proportionate relationship.For skill known to person of ordinary skill in the relevant
Art, method and apparatus may be not discussed in detail, but in the appropriate case, and the technology, method and apparatus should be considered as awarding
Weigh part of specification.In shown here and discussion all examples, any occurrence should be construed as merely example
Property, not as limitation.Therefore, the other examples of exemplary embodiment can further include different values.It should also be noted that phase
As label and letter similar terms are indicated in following attached drawing, therefore, once being defined in a certain Xiang Yi attached drawing, then exist
In subsequent attached drawing do not need that it is further discussed.
Embodiment 1
In some embodiments, as shown in Figure 1, a kind of multi-way valve, including the first valve body 1 and the second valve body 2；
First valve body 1 includes vent relief valve 11, the first straight travel valve 12, second work connection 13, third work connection
14, position unloading valve 17 in the 15, the 5th work the 16, first bypass ratio of connection of the 4th work connection；
Second valve body 2 includes the 23, the 9th work connection the 24, the tenth of the 22, the 8th work connection of the 21, the 7th work connection of the 6th work connection
Position unloading valve 26 in work the 25, second bypass ratio of connection；
Vent relief valve 11 is arranged in first oil inlet P 1 in the first oil inlet circuit of the first valve body 1, through vent relief valve 11
Inner flow passage is divided into two-way: the first straight travel valve 12 is arranged in first all the way, and passes through 12 A mouthfuls of the first straight travel valve
To the second work connection 13；14, the 4th work connection of third work connection in parallel, 15, the 5th work connection 16, tail connection setting below another way
There is position unloading valve 17 in the first bypass ratio, plays 1 pressure unloading function of the first valve body；
The the second oil inlet circuit and 1 first oil inlet circuit of the first valve body of second valve body 2 share same vent relief valve 11, from
And limit the pressure of hydraulic system；Second oil inlet P 2 in the second oil inlet circuit is arranged on the first valve body 1, the second oil inlet circuit
It is divided into two-way in 1 inner flow passage of the first valve body: is directly connected to the 6th work connection 21 of the second valve body 2 all the way, in addition passes through all the way
12 B mouthfuls of first straight travel valve to the 23, the 9th work connection 24 of the 22, the 8th work connection of the second valve body the 7th work connection of 2 parallel connection,
Tenth work connection 25, tail connection are provided with position unloading valve 26 in the second bypass ratio, play 2 pressure unloading function of the second valve body.
First straight travel valve 12 is two four-way direction valves；
It is described second work connection 13, third work connection the 14, the 4th work connection the 15, the 5th work connection the 16, the 6th work connection 21,
The 24, the tenth work connection 25 of the 23, the 9th work connection of the 22, the 8th work connection of 7th work connection, which is all made of, closes center Median Function, wraps
Include a 3-position 4-way proportional direction valve.
Further, first oil inlet P 1, second in the import of the vent relief valve 11 and the first oil inlet circuit into
Second oil inlet P 2 of oil return line is all connected with, and the oil return opening of vent relief valve 11 is connected to total oil return inlet T 1.First valve body 1 first
Check valve 112,2 oil inlet of the second 2 second oil inlet P of valve body bypass are set between 1 oil inlet bypass of oil inlet P and vent relief valve 11
Check valve 111 is set between vent relief valve 11.
Further, first oil inlet P 1 in 12 import of the first straight travel valve and the first oil inlet circuit, the
Second oil inlet P 2 in two oil inlet circuits is all connected with, and outlet A is connect with the second work 13 imports of connection, outlet B and the second valve body 2 the
The import connection of the 24, the tenth work connection 25 of the 23, the 9th work connection of the 22, the 8th work connection of seven work connection；First straight travel valve
12 spring terminals are connected with unloading port, independent external fuel tank.
Further, join in third work and divide between the 15, the 5th work connection 16 of the 14, the 4th work connection and the first oil inlet circuit
It She You not the first check valve 141, second one-way valve 151, third check valve 161；Prevent executing agency's oil liquid reflux from holding to other
Row mechanism.
Further, join in the 7th work and divide between the 24, the tenth work connection 25 of the 22, the 9th work connection and the second oil inlet circuit
It is not provided with the 4th check valve 221, the 5th check valve 241, the 6th check valve 251.Prevent executing agency's oil liquid reflux to other
Executing agency.
Further, in the first valve body 1, third work connection 14 further includes the first holding valve 142, the first logic of 2/2-way
Control valve 143, for preventing oil cylinder from sinking；5th work connection 16 further includes the second holding valve 162,2/2-way the second logic control
Valve 163 processed, for preventing oil cylinder from sinking；
In first valve body 1, third work connection 14 further includes the first overflow valve 144, the second overflow valve 145；4th work
Making connection 15 further includes third overflow valve 152, the 4th overflow valve 153；5th work connection 16 further includes the 5th overflow valve 164；It plays
Oil cylinder safeguard protection is emptied function with anti-.
Further, position unloading valve 17 in the first bypass ratio of first valve body 1, import and the first oil inlet circuit
Connection, oil return opening are connect with total oil return inlet T 1.
Further, position unloading valve 26 in the second bypass ratio of second valve body 2, import and the second oil inlet circuit
Connection, oil return opening are connect with total oil return inlet T 1.
Further, confluence passage is provided among first valve body 1 and the second valve body 2；The confluence passage
Are as follows:
8th 23B mouthfuls of work connection is connected to the second one-way valve 151 before the 4th work 15 imports of connection；
8th 23A mouthfuls of work connection is connected to 14B mouthfuls of connection of third work；
Tenth 25B mouthfuls of work connection is connected to the 5th 16A mouthfuls of work connection；
Tenth 25A mouthfuls of work connection is connected to the 5th 16B mouthfuls of work connection.
When scraper bowl collaborates to activate, oil liquid is supplied to the 4th work by the right position commutation of the 8th work connection 23 by the second main pump oil liquid
Make the import of connection 15；
When swing arm, which rises, to be activated, oil liquid is supplied to third work by the 8th work connection 23 left positions commutation by the second main pump oil liquid
Make the actuator port of connection 14；
When putting activation outside dipper, oil liquid is supplied to the 5th work by the tenth work connection 25 left positions commutation by the second main pump oil liquid
Make the actuator port of connection 16；
When receiving activation in dipper, the first main pump oil liquid is supplied the first main pump oil liquid by the 5th work connection 16 left positions commutation
To the actuator port of the tenth work connection 25.
Further, 14 A mouthfuls or B mouthfuls of the work of the first holding 142 import of valve connection third work connection, exports connection
The A mouth of oil cylinder or B mouthfuls.Described second keeps the 6th work A mouthfuls or B mouthfuls of work connection of 162 import of valve connection, outlet connection oil cylinder
A mouth or B mouthfuls.
In some embodiments, as shown in Figure 1, third work connection 14 further includes the first holding valve 142, the first logic
Control valve 143, the first overflow valve 144, the second overflow valve 145；Described first keeps valve 142, import and third work connection 14B
Mouth connection, outlet are connect with executing agency's actuator port.First logic control valve, 143 import keeps valve 142 with first
Feedback port connection, outlet be connected to total oil return inlet T 1.First overflow valve, 144 import keeps valve 142 to export with first
Parallel connection, outlet are connected to total oil return inlet T 1.Second overflow valve, 145 import is in parallel with third work 14 actuator port A of connection,
Outlet is connected to total oil return inlet T 1.
Further, 152 import of third overflow valve is in parallel with the 4th work 15 actuator port A of connection, exports and total
Oil return inlet T 1 is connected to.4th overflow valve, 153 import is in parallel with the 4th work 15 actuator port B of connection, outlet and total oil return
Mouth T1 connection.
In some embodiments, as shown in Figure 1, the 4th work connection 15 further includes third overflow valve 152, the 4th overflow
Valve 153；Described second keeps valve 162, and import is connect with the 5th 16A mouthfuls of work connection, and outlet connects with executing agency's actuator port
It connects.Second logic control valve, 163 import is connect with the feedback port of the second holding valve 162, and outlet connects with total oil return inlet T 1
It is logical.5th overflow valve, 164 import with second holding valve 162 export it is in parallel, outlet be connected to total oil return inlet T 1.Some
In embodiment, as shown in Figure 1, the 5th work connection 16 keeps valve 162, the second logic control valve the 163, the 5th to overflow including second
Flow valve 164；Described second keeps valve 162, and import is connect with the 5th 16A mouthfuls of work connection, outlet and executing agency's actuator port
Connection；Second logic control valve, 163 import is connect with the feedback port of the second holding valve 162, outlet and total oil return inlet T 1
Connection；5th overflow valve, 164 import with second holding valve 162 export it is in parallel, outlet be connected to total oil return inlet T 1.
In second valve body 1, the tenth work connection 25 further includes 2/2-way third logic control valve 252, the 6th overflow
Valve 253 plays oil cylinder safeguard protection and prevents being emptied function.252 import of third logic control valve and the tenth work connection 25
Oil return opening connection, outlet are connected to total oil return inlet T 1, and control mouth is connect with the A mouth of the tenth work connection, spring terminal and unloading port's phase
Connection, independent external fuel tank.
Further, 253 import of the 6th overflow valve is in parallel with the tenth work 25 actuator port A of connection, exports and total
Oil return inlet T 1 is connected to.
In the present embodiment, the second work connection 13, the 15, the 5th work the 16, the 6th work of connection of the 14, the 4th work connection of third work connection
Make the 24, the tenth work connection 25 of the 23, the 9th work connection of connection the 22, the 8th work connection of the 21, the 7th work connection to be all made of and close center middle-position machine
Can, all valve rods for the connection that works, which are all made of, closes Center Technology, and function symbol is 3-position 4-way proportional direction valve.
First straight travel valve 12 is two four-way direction valves, its activation is from controller output control pair
The solenoid valve answered.
Position unloading valve 17 in first bypass ratio, to control end pressure straight by controller for position unloading valve 26 in the second bypass ratio
Connect the corresponding proportional pressure-reducing valve of control.
First logic control valve 143, the second logic control valve 163, the electromagnetic control signal of third logic control valve 252 are straight
It connects to be exported by controller and control.
Embodiment 2
As shown in Fig. 2, unlike the first embodiment, the 6th work connection 21 is logical using three six that open center Median Function
Proportional reversing valve；6th work connection 21 open center oil circuit with the 7th work connection the 22, the 8th work connection the 23, the 9th work join 24,
The oil inlet connection of tenth work connection 25.
In the present embodiment, first straight travel valve 12 is two four-way direction valves；The second work connection
13, the 23, the 9th work of the 22, the 8th work connection of the 16, the 7th work connection of the 15, the 5th work connection of the 14, the 4th work connection of third work connection
The 24, the tenth work connection 25 of connection, which is all made of, closes center Median Function, includes a 3-position 4-way proportional direction valve.6th work
Make connection 21 using three six logical proportional reversing valves for opening center Median Function.
Embodiment 3
A kind of electronically controlled hydraulic system, including above-mentioned multi-way valve, the first main pump, the second main pump；First main pump and first into
First oil inlet P 1 of oil return line is connected, and the second main pump is connected with second oil inlet P 2 in the second oil inlet circuit；Hydraulic pressure system
System includes get on the bus work system and running gear of getting off；Work system of getting on the bus includes the 14, the 4th work connection 15, the of third work connection
The 24, the tenth work connection 25 of the 23, the 9th work connection of the 16, the 8th work connection of five work connection；Running gear of getting off includes the second work connection
13, the 6th work connection 21.The 23, the 9th work of the 16, the 8th work connection of third work connection the 15, the 5th work connection of the 14, the 4th work connection
The 13, the 6th work connection 21 of the 24, the tenth the 25, second work of work connection connection of connection is separately connected a proportional pressure-reducing valve；
First valve body, 1 first oil inlet circuit is divided into two-way in valve inner flow passage: the first straight travel valve 12 is flowed to all the way,
And pass through 12 working hole A to second of the first straight travel valve work connection 13；Third work connection the 14, the 4th in parallel below another way
The 15, the 5th work connection 16 of work connection；In the 15, the 5th work connection 16 of the 14, the 4th work connection of third work connection and the first oil inlet circuit
Between be respectively equipped with the first check valve 141, second one-way valve 151, third check valve 161, for preventing executing agency's oil liquid anti-
Flow to other executing agency.
Second oil inlet P 2 is arranged on the first valve body 1, and inner flow passage is divided into two-way on the first valve body 1: all the way directly
Flow to the import of the 6th work connection 21；Another way passes through inner flow passage and the second valve body by 12B mouthfuls of the first straight travel valve
2 oil inlet circuit communicates, the 23, the 9th work connection of the 22, the 8th work connection of the 7th work connection of parallel connection below 2 oil inlet circuit of the second valve body
24, the tenth work connection 25 joins in the 7th work and divides between the 24, the tenth work connection 25 of the 22, the 9th work connection and the second oil inlet circuit
It is not provided with the 4th check valve 221, the 5th check valve 241, the 6th check valve 251, for preventing executing agency's oil liquid reflux from arriving
Other executing agency.First valve body 1 and the second valve body 2 share a vent relief valve 11, to limit the pressure of hydraulic system.
First valve body, 1 first oil inlet circuit position unloading valve 17 in work connection tail connection the first bypass ratio of setting, in middle position
When the 1 first oil inlet circuit off-load of the first valve body.Second valve body, 2 second oil inlet circuit is in work connection tail connection setting the second bypass ratio
Middle position unloading valve 26, the 2 second oil inlet circuit off-load of the second valve body at middle position.
The actuator port B setting first that third work joins 14 keeps valve 142, the first holding valve when position in third work connection 14
142 is normally closed, and when 14 left positions of third work connection are activated, feeding back to 142 one end of the first holding valve by the first oil inlet circuit pressure makes
First holding valve 142 switches to normally open position, and oil liquid enters executing agency's working hole；It is logical when third work connection 14 right positions activation
It crosses electric signal and activates the first logic control valve 143, make an end pressure of the first holding valve 142 by damping off-load to oil return line,
First holding valve 142 is switched to normally open position, and executing agency's oil liquid flows to total oil return inlet T 1 by third work connection 14.
The actuator port A setting second that 5th work joins 16 keeps valve 162, the second holding valve when position in the 5th work connection 16
162 is normally closed, and when third work connection 14 right positions activation, which feeds back to 162 one end of the second holding valve by the first oil inlet circuit pressure, makes the
Two holding valves 162 switch to normally open position, and oil liquid enters executing agency's working hole；Pass through when the 5th work connection 16 left positions activation
Electric signal activates the second logic control valve 163, makes an end pressure of the second holding valve 162 by damping off-load to oil return line, the
Two holding valves 162 are switched to normally open position, and executing agency's oil liquid flows to total oil return inlet T 1 by the 5th work connection 16.
It gets on the bus work system, such as wherein the 13, the 6th work of the second work connection of the 8th work connection 23 and running gear of getting off
When joining 21 composite move, the first straight travel valve 12, which receives the pilot pressure that switch valve comes and changes spool, is switched to another work
Make position, the first oil inlet circuit oil liquid flows to the 7th work by 12 B mouthful of the first straight travel valve and joins 22 imports, second into
Oil return line flows to the 6th work 21 actuator ports of connection all the way, and another way is worked by 12 A mouthfuls to second of the first straight travel valve
Join 13 imports.
Embodiment 4
As shown in figure 3, being electrohydraulic control system electric logic control figure.A kind of automatically controlled positive stream amount control method, comprising:
Obtain the handle signal of electric control handle；
Handle signal is parsed, and is converted into electric current；
On the one hand, to electric current after signal processing, corresponding proportional pressure-reducing valve is sent by current signal, control corresponds to
Work connection pilot pressure, to control the opening degree of corresponding work connection；
On the other hand, flow needed for work joins is calculated according to electric current, flow needed for joining according to each work obtains needed for pump
Flow；It show that pump discharge controls electric current according to flow rate calculation needed for pumping, then sends control current control pump pivot angle, make to pump defeated
Corresponding flow joins to work out.
Embodiment 5
A kind of automatically controlled positive flow control device, including controller, the controller are used for:
Obtain the handle signal of electric control handle；
Handle signal is parsed, and is converted into electric current；
On the one hand, to electric current after signal processing, corresponding proportional pressure-reducing valve is sent by current signal, control corresponds to
Work connection pilot pressure, to control the opening degree of corresponding work connection；
On the other hand, flow needed for work joins is calculated according to electric current, flow needed for joining according to each work obtains needed for pump
Flow；It show that pump discharge controls electric current according to flow rate calculation needed for pumping, then sends control current control pump pivot angle, make to pump defeated
Corresponding flow joins to work out.
Embodiment 6
A kind of electrohydraulic control system, including above-mentioned multi-way valve, electric control handle, above-mentioned controller, proportional pressure-reducing valve, electricity
Control pump；The electric control pump includes the first main pump, the second main pump；First main pump is connected with first oil inlet P 1 in the first oil inlet circuit
Logical, the second main pump is connected with second oil inlet P 2 in the second oil inlet circuit；Hydraulic system includes getting on the bus work system and to get off
Running gear；
The signal of electric control handle different openings degree is received by controller, to calculate the opening degree and main pump of work connection
Flow demand, then opened or closed in sequence by proportional pressure-reducing valve output pilot pressure control work connection and main pump；
Hydraulic system is by getting on the bus work system and running gear of getting off forms；All working connection spool, which all uses, closes center skill
Art, main pump idling flow passes through automatically controlled unloading valve off-load when position in valve rod；
Work system of getting on the bus and get off running gear compound work when, automatically controlled cut is carried out by the first straight travel valve 12
It changes.
When more executing agency's composite moves, by automatically controlled reduction valve rod opening degree, biggish back pressure is generated at spool, from
And executing agency is made to realize the preferential and coordinated movement of various economic factors.
The controller is useless in the handle signal for obtaining electric control handle, parses to handle signal, and be converted into electricity
Stream, electric current are divided into two-way:
Control work all the way joins pilot pressure, to control the opening degree of each work connection；(electric current is sent by PWM module
Request electric current to proportional pressure-reducing valve, proportional pressure-reducing valve exports corresponding pilot pressure according to electric current and removes control work connection core),
Another way calculates flow needed for work joins according to electric current, and pump joins flow according to each work and adds up, and obtains pump
Required flow；It show that pump discharge controls electric current according to flow rate calculation needed for pumping, then sends current control pump pivot angle, pump will be defeated
Corresponding flow joins to work out.
Further, the electric control handle is automatically controlled, and positive pole connects 24V voltage, cathode ground connection, bus interface point
It is not connected to the CAN_H and CAN_L of controller, handle signal is sent by J1939 agreement.
Further, described that electric current is parsed and be converted into handle signal, 0- is converted into for handle signal 0-1000
750 milliamperes of electric currents.
Further, control work joins pilot pressure, to control the opening degree of each work connection, the control issued for PWM
Electric current makes proportional pressure-reducing valve export corresponding pilot pressure according to electric current, is then connected to work by hydraulic hose and joins end cap
On.
Further, the control pump pivot angle is to export proportional pressure-reducing valve by the proportional pressure-reducing valve of PWM control pump
The swash plate pivot angle of pressure control pump, so that the flow of pump be made to change.
Handle signal is parsed, handle signal is converted into current signal, current signal is divided into two branches, a branch
It controls work and joins pilot pressure, to control the opening degree of each work connection, another branch calculates work connection demand according to electric current
Then flow obtains demand pump flow, show that main pump controls electric current further according to demand pump flow, finally obtain the first main pump or the
Two main pumps flow.
When being not received by left and right handle information, no signal current, each work connection is in middle position, the first main pump/the second
Main pump is in minimum injection rate idling mode, and position unloading valve activates in bypass ratio, the first main pump and the second main pump by first into
Oil return line and the second oil inlet circuit carry out pressure off-load.
When receiving left handle from revolution information: having the 7th work 22 proportional pressure-reducing valves of connection of electric current output control, simultaneously
The electric current is computed the proportional control valve to the second main pump, controls position off-load in the second bypass ratio also according to the size of the electric current
26 closing amount of valve；First main pump also maintains idling flow, and position unloading valve 17 is kept it turning in the first bypass ratio.
When receiving right handles from scraper bowl information: having the 4th work 15 proportional pressure-reducing valves of connection of electric current output control, simultaneously
The electric current is computed the proportional control valve of the first main pump of control, unloads also according to position in size the first bypass ratio of control of the electric current
17 closing amount of lotus valve；Second main pump also maintains idling flow, and position unloading valve 26 is kept it turning in the second bypass ratio.
Receive left handle come from dipper information when: have electric current output control the 5th work connection 16 and the tenth work connection 25 pairs
The proportional pressure-reducing valve answered, while the electric current is computed the proportional control valve to the first main pump and the second main pump, the first bypass ratio
Position unloading valve 26 is linearly closed according to current signal size in middle position unloading valve 17 and the second bypass ratio.
Receive right handles carry out robot arm information when: have electric current output control third work connection 14 and the 8th work connection 23 pairs
The proportional pressure-reducing valve answered, while the electric current is computed the proportional control valve to the first main pump and the second main pump, the first bypass ratio
Position unloading valve 26 is linearly closed according to current signal size in middle position unloading valve 17 and the second bypass ratio.
When receiving right handles swing arm decline information: the first logic control valve 143 must be electric to normally open position, with the first logic
The first holding 142 control mouth off-load of valve that control valve 143 connects, executing agency's oil liquid keep valve 142 to arrive third work by first
Make 14B mouthfuls of connection and arrives drainback passage and internal recovery passage.Electric current output the first discharge of main pump of control is arrived by the first oil inlet circuit
14 actuator port A of third work connection.
When receiving collection of letters breath in left handle dipper: the second logic control valve 163 must be electric to normally open position, with the second logic
The second holding 162 control mouth off-load of valve that control valve 163 connects, executing agency's oil liquid keep valve 162 and the 5th work by second
Make 16A mouthfuls of connection and arrive total oil return line, joins 25B mouthfuls of arrival third logic control valves 252 and recovery passage simultaneously also by the tenth work,
Drainback passage is finally reached, executing agency A mouthfuls of pressure is fed back in 252 one end of third logic control valve, according to A mouthfuls of pressure size
Adjust the position of back pressure.
When receiving work system and running gear information: the activation of the first straight travel valve 12 commutates to right position；
First main pump oil liquid feeds to the 16, the 8th work connection of the 15, the 5th work connection of work system third work the 14, the 4th work connection of connection of getting on the bus
23, the 24, the tenth work connection 25 of the 9th work connection；Second main pump oil liquid feeds to running gear walking work connection the second work connection of getting off
13, the 6th work connection 21.
When receiving left and right handle simultaneously operation information: judging that corresponding priority grade, priority level are low according to electric current
Multiplied by corresponding control coefrficient；Electric current after being determined according to priority is output to guide proportion pressure reducing valve control terminal, control pair
Different pilot pressures is answered, so that work is associated in compound tense different opening degrees；Electric current be output to main pump end calculate it is required
Flow makes the flow of output match with demand by control pump electric current.
In the utility model, automatically controlled positive flow directly acquires electric control handle information, directly controls work connection by controller
Opening degree and discharge of main pump respond faster in signal control relative to sensor detection electric control handle.
Automatically controlled positive flow is the opening degree signal by handle while feeding back on automatically controlled work connection and main pump, is being controlled
Due to pump and valve synchronously control in journey, the response speed of executing agency will be promoted significantly；In the control of valve and pump, control can be passed through
Priority is arranged in device processed, and then reduces unlatching required precision of the work connection to valve rod；It removes the pressure-gradient control valve of automatically controlled work connection and patrols
Circuit is collected, casting and the difficulty of processing of automatically controlled work connection are reduced.In more executing agency's recombination processes, pass through automatically controlled reduction work
Make the opening degree joined, to make executing agency's coordinated movement of various economic factors.Automatically controlled positive flow system responds fastly in control process, respectively executes machine
Structure can be according to the opening time and flow rising gradient that operating conditions pump, and then improves handling；Under limiting condition, work as liquid
When system power being pressed to be greater than engine power, reduce the discharge capacity of pump by reducing the discharge capacity output signal of pump, and then reduce liquid
System power is pressed, so that engine be prevented to fall speed.
In addition, the utility model principle, which is removed, is used for digging machine system, it may also be used for other engineering machinery.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The above is only the preferred embodiment of the utility model, it should be pointed out that: for the common skill of the art
For art personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these improve and
Retouching also should be regarded as the protection scope of the utility model.
Claims (10)
1. a kind of multi-way valve, which is characterized in that including the first valve body and the second valve body；
First valve body includes vent relief valve, the first straight travel valve, the second work connection, third work connection, the 4th work
Work joins, the 5th work joins, position unloading valve in the first bypass ratio；
Second valve body includes the 6th work connection, the 7th work connection, the 8th work connection, the 9th work connection, the tenth work connection, the
Position unloading valve in two bypass ratios；
Vent relief valve is arranged in first oil inlet in the first oil inlet circuit, and the first oil inlet circuit is divided into two-way: first is arranged all the way
First straight travel valve, and joined by A mouthfuls of the first straight travel valve to the second work；Third work in parallel below another way
Work joins, the 4th work joins, the 5th work connection, and tail connection is provided with position unloading valve in the first bypass ratio；
Second oil inlet circuit and the first oil inlet circuit share same vent relief valve；Second oil inlet circuit is divided into two-way: first all the way
6th work connection of connection the second valve body of setting, in addition passes through B mouthful of the first straight travel valve to the second valve body the in parallel 7th all the way
Work connection, the 8th work connection, the 9th work connection, the tenth work connection, tail connection are provided with position unloading valve in the second bypass ratio；
First straight travel valve is two four-way direction valves；
The second work connection, third work connection, the 4th work connection, the 5th work connection, the 7th work connection, the 8th work connection, the
Nine work connection, the tenth work connection are all made of and close center Median Function, include a 3-position 4-way proportional direction valve；
The 6th work connection is using the 3-position 4-way proportional direction valve for closing center Median Function or opens center Median Function
Three six logical proportional reversing valves.
2. multi-way valve according to claim 1, it is characterised in that: the 6th work connection, which uses, opens center Median Function
Three six logical proportional reversing valves, the 6th work connection open center oil circuit and the 7th work connection, the 8th work connection, the 9th work
The oil inlet connection of connection, the tenth work connection.
3. multi-way valve according to claim 1, it is characterised in that: the import of the vent relief valve and the first oil inlet are returned
First oil inlet on road, the second oil inlet circuit the second oil inlet be all connected with, the oil return opening of vent relief valve and total oil return opening connect
It is logical；
First oil inlet in the first straight travel valve import and the first oil inlet circuit, the second oil inlet circuit second into
Hydraulic fluid port is all connected with, and outlet A connect with the second work connection import, outlet B and the work of the second valve body the 7th join, the 8th work join, the
The import connection of nine work connection, the tenth work connection.
4. multi-way valve according to claim 1, it is characterised in that: in third work connection, the 4th work connection, the 5th work connection
The first check valve, second one-way valve, third check valve are respectively equipped between the first oil inlet circuit；
The 7th work connection, the 9th work connection, the tenth work connection the second oil inlet circuit between be respectively arranged with the 4th check valve,
5th check valve, the 6th check valve；For preventing executing agency's oil liquid reflux to other executing agency.
5. multi-way valve according to claim 1, it is characterised in that: third work connection further includes the first holding valve, the
One logic control valve, the first overflow valve, the second overflow valve；
The first holding valve import is connect with B mouthfuls of connection of third work, and outlet is connect with executing agency's actuator port；Described
First logic control valve import is connect with the feedback port of the first holding valve, and outlet is connected to total oil return opening；First overflow
Valve import keeps valve outlet in parallel with first, and outlet is connected to total oil return opening；The second overflow valve import and third works
It is in parallel to join actuator port A, outlet is connected to total oil return opening.
6. multi-way valve according to claim 1, it is characterised in that: the 4th work connection has third overflow valve, the 4th
Overflow valve；The third overflow valve import is in parallel with the 4th work connection actuator port A, and outlet is connected to total oil return opening；It is described
The 4th overflow valve import with the 4th work connection actuator port B it is in parallel, export be connected to total oil return opening；
And/or the 5th work connection includes the second holding valve, the second logic control valve, the 5th overflow valve；Described second protects
Valve is held, import is connect with the 5th A mouthfuls of work connection, and outlet is connect with executing agency's actuator port；The second logic control valve
Import is connect with the feedback port of the second holding valve, and outlet is connected to total oil return opening；The 5th overflow valve import is protected with second
Valve outlet parallel connection is held, outlet is connected to total oil return opening.
7. multi-way valve according to claim 1, it is characterised in that: it is described tenth work connection have third logic control valve,
6th overflow valve, for playing oil cylinder safeguard protection and preventing being emptied function；The third logic control valve import joins with the tenth work
Oil return opening connection, outlet be connected to total oil return opening, control mouth with the tenth work join A mouth connect；6th overflow valve
Import is in parallel with the tenth work connection actuator port A, and outlet is connected to total oil return opening.
8. multi-way valve according to claim 1, it is characterised in that: be provided between first valve body and the second valve body
Confluence passage；The confluence passage are as follows:
8th B mouthfuls of work connection is connected to the second one-way valve before the 4th work connection import；
8th A mouthfuls of work connection is connected to B mouthfuls of connection of third work；
Tenth B mouthfuls of work connection is connected to the 5th A mouthfuls of work connection；
Tenth A mouthfuls of work connection is connected to the 5th B mouthfuls of work connection；
When scraper bowl collaborates to activate, the second main pump oil liquid joins right position commutation by the 8th work and oil liquid is supplied to the 4th work connection
Import；
When swing arm, which rises, to be activated, oil liquid is supplied to third work connection by the 8th work connection left position commutation by the second main pump oil liquid
Actuator port；
When putting activation outside dipper, oil liquid is supplied to the 5th work connection by the tenth work connection left position commutation by the second main pump oil liquid
Actuator port；
When receiving activation in dipper, the first main pump oil liquid is supplied to the tenth by the 5th work connection left position commutation by the first main pump oil liquid
Work the actuator port joined.
9. a kind of electric-control system, it is characterised in that: including the described in any item multi-way valves of claim 1-8.
10. electric-control system according to claim 9, it is characterised in that: the electric-control system be divided into get on the bus work system and
It gets off running gear, work system of getting on the bus includes third work connection, the 4th work connection, the 5th work connection, the 8th work connection, the 9th
Work connection, the tenth work connection；Running gear of getting off includes the second work connection, the 6th work connection；
First valve body the first oil inlet circuit joins position unloading valve in the first bypass ratio of setting, the first valve body first at middle position in tail
The off-load of oil inlet circuit；Second valve body the second oil inlet circuit joins position unloading valve in the second bypass ratio of setting in tail, at middle position the
Two valve body the second oil inlet circuit off-loads；
The actuator port B setting first that third work joins keeps valve, and the first holding valve is normally closed when position in third work connection, third work
When making the activation of connection left position, feeding back to first holding valve one end by the first oil inlet circuit pressure makes the first holding Vavle switching to normally opened
Position, oil liquid enter executing agency's working hole；The first logic control is activated by electric signal when third work joins the activation of right position
Valve makes an end pressure of the first holding valve by damping off-load to oil return line, and first keeps Vavle switching to normally open position, executes machine
Structure oil liquid flows to total oil return opening by third work connection；
The actuator port A setting second that 5th work joins keeps valve, and the second holding valve is normally closed when position in the 5th work connection, third work
Feeding back to second holding valve one end by the first oil inlet circuit pressure when making to join the activation of right position makes the second holding Vavle switching to normally opened
Position, oil liquid enter executing agency's working hole；The second logic control is activated by electric signal when the 5th work connection left position activation
Valve makes an end pressure of the second holding valve by damping off-load to oil return line, and second keeps Vavle switching to normally open position, executes machine
Structure oil liquid flows to total oil return opening by the 5th work connection；
Work system of getting on the bus and get off running gear compound work when, pass through the first straight travel valve and carry out automatically controlled switching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822131000.1U CN209430514U (en) | 2018-12-19 | 2018-12-19 | Multi-way valve and electric control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822131000.1U CN209430514U (en) | 2018-12-19 | 2018-12-19 | Multi-way valve and electric control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209430514U true CN209430514U (en) | 2019-09-24 |
Family
ID=67972429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822131000.1U Active CN209430514U (en) | 2018-12-19 | 2018-12-19 | Multi-way valve and electric control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209430514U (en) |
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2018
- 2018-12-19 CN CN201822131000.1U patent/CN209430514U/en active Active
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