CN108194441A - Multi-way valve tail joins and electro-hydraulic proportional multi-way valve - Google Patents
Multi-way valve tail joins and electro-hydraulic proportional multi-way valve Download PDFInfo
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- CN108194441A CN108194441A CN201711455380.8A CN201711455380A CN108194441A CN 108194441 A CN108194441 A CN 108194441A CN 201711455380 A CN201711455380 A CN 201711455380A CN 108194441 A CN108194441 A CN 108194441A
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- way valve
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- 239000012530 fluid Substances 0.000 claims abstract description 52
- 230000006837 decompression Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 7
- 238000012545 processing Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 212
- 239000000446 fuel Substances 0.000 description 6
- 238000011161 development Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010729 system oil Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
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- Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The present invention relates to a kind of multi-way valve tail connection and electro-hydraulic proportional multi-way valves, wherein multi-way valve tail connection includes valve body (5), valve body (5) is equipped with load-sensitive feedback hydraulic fluid port (13) and oil return opening (11), and load-sensitive feedback hydraulic fluid port (13) is selectively connected with oil return opening (11).Valve body in multi-way valve tail connection embodiment of the present invention is equipped with load-sensitive feedback hydraulic fluid port and oil return opening, load-sensitive feedback hydraulic fluid port is selectively connected with oil return opening, when load-sensitive feedback hydraulic fluid port is connected with oil return opening, it can realize the function that off-load is carried out to load feedback oil circuit, the unloading function of load feedback oil circuit is made to be integrated on tail connection, be conducive to the structure of other connection of multi-way valve where simplifying tail connection, make the arrangement of control oil circuit that other join also more convenient, reduce difficulty of processing.
Description
Technical field
The present invention relates to multi-way valve technical field more particularly to a kind of multi-way valve tail connection and electro-hydraulic proportional multi-way valve.
Background technology
At present, load sensing multi-way valve has been widely used in various engineering machinery, and this valve during the work time may be used
To realize the composite move of multiple executing agencies, and when the flow of hydraulic pump reaches saturation, each action for joining executing agency
It is proportional to the aperture of valve core of main valve not by load effect, the flow needed for different loads can be effectively adjusted, ensures that complete machine is moved
The stability of work.
Chip load sensing multi-way valve is generally composed of a certain number of valve units, including oil inlet connection, work
Connection and tail connection, integrate reversal valve, check valve, overflow valve and Fill valve, and control mode has control, hydraulic pilot control manually
System and electric proportional control.Wherein, the multi-way valve of Hydraulic guide control needs to provide external pilot oil sources in systems, passes through control
Pilot pressure processed pushes main valve plug to generate displacement, so as to control bound core aperture, realizes work connection assignment of traffic；Electric ratio control
Analog or digital signal is proportionally changed into continuous flow or pressure control bound core in hydraulic system by the multi-way valve of system
Generation displacement can utilize the ratio for controlling signal realization fluid flow, pressure to control, simplified system, realization far distance controlled,
Automation control improves the stability of system.
At present, load sensing multi-way valve generally use constant difference overflow valve and pressure-compensated valve realize multiple execution of multi-way valve
Mechanism acts simultaneously, and the highest load pressure of each executing agency is transferred to spring side and the pressure compensation that oil inlet joins by shuttle valve
The side of valve is loaded the pressure of relatively low work connection using pressure compensation valve compensation, is consistent the front and rear pressure difference of main valve plug,
Realize anti-saturation function, i.e., when flow reaches saturation, each main valve pressure difference that joins is consistent, and ensures the aperture of flow and main valve plug
It is proportional, it is few by load effect in a certain range, and the general only setting oil inlet of tail connection, oil outlet, integrated LS overflow valves and
LS flow control valves are realized and introduce, draw hydraulic pump flow, reduce the functions such as LS oil circuits impact, realize that function is less, structure letter
It is single.
At present, engineering machinery vehicle majority using manually control or Hydraulic guide control multi-way valve, match constant displacement pump or
Variable pump systems, but there are operator's operation is laborious, control accuracy is poor, is difficult to each execution of stable coordination control for this control mode
The problems such as action, system job stability and the degree of automation are affected by multi-way valve, thus using electric proportional multi-way valve into
Following application trend for various engineering machinery.But it is put into the multi-way valve for developing manual or Hydraulic guide control
Mating mold, fixture and cutter, if the multi-way valve of completely discarded original manual control or Hydraulic guide control and mating
Various tools, again develop electro-hydraulic proportional multi-way valve, very big waste can be caused, development cycle and development cost also are difficult to protect
Card.
It should be noted that the information for being disclosed in background of invention part is merely intended to increase the totality to the present invention
The understanding of background, and be not construed as recognizing or imply in any form the information form by those skilled in the art public affairs
The prior art known.
Invention content
The purpose of the present invention is to propose to a kind of multi-way valve tail connection and electro-hydraulic proportional multi-way valves, make so that multi-way valve tail connection has
The function of load feedback oil circuit off-load.
To achieve the above object, the present invention provides a kind of multi-way valve tail connection, and including valve body, valve body is equipped with load-sensitive
Hydraulic fluid port and oil return opening are fed back, load-sensitive feedback hydraulic fluid port is selectively connected with oil return opening.
Further, tail connection further includes switch valve, and switch valve is connected between load-sensitive feedback hydraulic fluid port and oil return opening.
Further, tail connection further includes pressure reducing valve, and it is first that main oil inlet, internal pilot oil-feed port and inside are additionally provided on valve body
Drain tap is led, the oil inlet of pressure reducing valve is connected with main oil inlet, and the oil outlet of pressure reducing valve is connected with internal pilot oil-feed port, internal
Work connection of guide's oil-feed port for into load sensing multi-way valve provides pilot control oil, internal pilot drain tap and oil return opening
Connection, internal pilot drain tap are used to make the pilot control oil pressure release in work connection.
Further, internal pilot oil-feed port includes the first oil inside offering mouth and the second oil inside offering mouth, and the first inside supplies
The pilot control oil inlet of hydraulic fluid port and the second oil inside offering mouth respectively with main valve plug both ends in work connection connects.
Further, internal pilot drain tap includes the first inside drain tap and the second inside drain tap, is let out inside first
The pilot control drain tap of hydraulic fluid port and the second inside drain tap respectively with main valve plug both ends in work connection connects.
Further, tail connection further includes oil filter, and oil filter is connected to the oil outlet of pressure reducing valve.
Further, the connection being additionally provided on valve body between pressure tap, pressure tap and pressure reducing valve and internal pilot oil-feed port
Oil circuit connection.
Further, external pilot drain tap is additionally provided on valve body, external pilot drain tap is connected with oil return opening.
Further, tail connection further includes overflow valve, and overflow valve is connected between load-sensitive feedback hydraulic fluid port and oil return opening.
Further, tail connection further includes overflow valve and switch valve, and the bottom of valve body is plane, when valve body forward direction is placed, is overflow
Stream valve and switch valve are separately mounted to the top left side of valve body and up and down arrangement, and pressure reducing valve is mounted on the top right side and water of valve body
Plain cloth is put.
Further, first passage group is equipped in valve body, first passage group is put down in the first function being vertically arranged of valve body
Load-sensitive feedback hydraulic fluid port is made to be connected with the oil inlet of switch valve and the oil inlet of overflow valve on face.
Further, second channel group is equipped in valve body, second channel group is put down in the second function being vertically arranged of valve body
Main oil inlet is made to be connected with pressure reducing valve oil inlet on face.
Further, pressure tap is additionally provided on valve body, is equipped with third channel group in valve body, third channel group is in the water of valve body
Pressure reducing valve oil outlet is made to be connected with internal pilot oil-feed port and pressure tap in the third flat functional of flat setting.
Further, external pilot drain tap is additionally provided on valve body, is equipped with fourth set in valve body, fourth set exists
Internal pilot drain tap is made to be connected with oil return opening and external pilot drain tap in the 4th flat functional being vertically arranged of valve body.
Further, Five-channel group is equipped in valve body, Five-channel group is put down in the horizontally disposed five-function of valve body
Make on face and in the 6th flat functional being vertically arranged of valve body pressure reducing valve oil outlet and switch valve oil outlet and oil return
Mouth connection.
Further, internal pilot oil-feed port includes the first oil inside offering mouth and the second oil inside offering mouth, internal pilot are let out
Hydraulic fluid port includes the first inside drain tap and the second inside drain tap, and the first oil inside offering mouth and the first inside drain tap are arranged at
Duct where the left side of the leading flank of valve body, duct where the first oil inside offering mouth and the first inside drain tap it is front and rear arrange and
Length is different, to connect different channels；And/or second oil inside offering mouth and the second inside drain tap be arranged at valve body
Duct where the right side of leading flank, duct where the second oil inside offering mouth and the second inside drain tap it is front and rear arrange and length not
Together, to connect different channels.
To achieve the above object, the present invention also provides a kind of electro-hydraulic proportional multi-way valves, join including above-mentioned multi-way valve tail.
Further, electro-hydraulic proportional multi-way valve further includes work connection, and main valve plug, the internal pilot of tail connection are equipped in work connection
Oil-feed port is connected with the pilot control oil inlet at main valve plug both ends, is transported with joining to provide to work connection by tail for control bound core
Dynamic guide's fluid, the internal pilot drain tap of tail connection is connected with the pilot control drain tap at main valve plug both ends, to be joined by tail
Realize guide's draining, the oil inlet quantity of the main oil inlet of multi-way valve is by electric proportional control, so that main valve plug realizes electric-hydraulic proportion control
System.
Based on above-mentioned technical proposal, the valve body in multi-way valve tail connection embodiment of the present invention is equipped with load-sensitive and feeds back hydraulic fluid port
And oil return opening, load-sensitive feedback hydraulic fluid port are selectively connected with oil return opening, when load-sensitive feedback hydraulic fluid port is connected with oil return opening
When, it can realize the function that off-load is carried out to load feedback oil circuit, the unloading function of load feedback oil circuit is made to be integrated on tail connection,
Be conducive to the structure of other connection of multi-way valve where simplifying tail connection, make the arrangement of control oil circuit that other join also more convenient, drop
Low difficulty of processing.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and forms the part of the application, this hair
Bright illustrative embodiments and their description do not constitute improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is the schematic diagram that multi-way valve tail of the present invention joins one embodiment.
Fig. 2 is the sectional view for the first flat functional that multi-way valve tail of the present invention joins one embodiment.
Fig. 3 is the sectional view for the third flat functional that multi-way valve tail of the present invention joins one embodiment.
Fig. 4 is the sectional view for the 4th flat functional that multi-way valve tail of the present invention joins one embodiment.
Fig. 5 is the vertical view that multi-way valve tail of the present invention joins one embodiment.
In figure：
1st, overflow valve；2nd, switch valve；3rd, pressure reducing valve；4th, oil filter；5th, valve body；6th, main oil inlet；7th, the first oil inside offering
Mouthful；8th, the second oil inside offering mouth；9th, the first inside drain tap；10th, the second inside drain tap；11st, oil return opening；12nd, external pilot
Drain tap；13rd, load-sensitive feedback hydraulic fluid port；14th, pressure tap；15th, thread segment；16th, oil return oil pocket；17th, pressure reducing valve oil outlet；
18th, pressure reducing valve oil inlet；19th, pressure reducing valve drain tap；
21st, first passage；22nd, second channel；23rd, third channel；24th, fourth lane；25th, Five-channel；26th, the 6th is logical
Road；27th, the 7th channel；28th, the 8th channel；29th, the 9th channel；30th, the tenth channel；31st, the 11st channel；32nd, the tenth two-way
Road；33rd, the tenth triple channel；34th, the tenth four-way；35th, the tenth Five-channel；36th, the 16th channel；37th, the 17th channel；38、
18th channel；39th, the 19th channel；41st, first clamping plate position；42nd, second clamping plate position；43rd, third clamping plate position.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in embodiment is clearly and completely retouched
It states.Obviously, described embodiment is only the part of the embodiment of the present invention, instead of all the embodiments.Based on this hair
Bright embodiment, the every other implementation that those of ordinary skill in the art are obtained without making creative work
Example, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that term " " center ", " transverse direction ", " longitudinal direction ", "front", "rear",
The orientation or position relationship of the instructions such as "left", "right", " on ", " under ", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description rather than instruction or dark
Show that signified device or element there must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that right
The limitation of the scope of the present invention.
With reference to shown in 1~Fig. 5 of figure, in an illustrative examples of multi-way valve tail provided by the present invention connection, multichannel
Valve tail connection includes valve body 5, and valve body 5 is equipped with load-sensitive feedback hydraulic fluid port 13 and oil return opening 11, load-sensitive feedback hydraulic fluid port 13 and
Oil return opening 11 selectively connects.
In above-mentioned illustrative examples, valve body 5 is equipped with load-sensitive feedback hydraulic fluid port 13 and oil return opening 11, load-sensitive
Feedback hydraulic fluid port 13 is selectively connected with oil return opening 11, when load-sensitive feedback hydraulic fluid port 13 is connected with oil return opening 11, Ke Yishi
The function of off-load is now carried out to load feedback oil circuit, the unloading function of load feedback oil circuit is made to be integrated on tail connection, is conducive to letter
The structure of other connection of multi-way valve where changing tail connection makes the arrangement of control oil circuit that other join also more convenient, reduces difficult processing
Degree.
Further, tail connection further includes switch valve 2, and switch valve 2 is connected to load-sensitive feedback hydraulic fluid port 13 and oil return opening 11
Between.By setting switch valve 2, the purpose that load-sensitive feedback hydraulic fluid port 13 is selectively connected with oil return opening 11 can be realized.
When switch valve 2 is connected, load-sensitive feedback hydraulic fluid port 13 is connected with oil return opening 11, realizes the off-load to load feedback oil circuit；When
When switch valve 2 powers off, load-sensitive feedback hydraulic fluid port 13 is disconnected with oil return opening 11, and load-sensitive feedback hydraulic fluid port 13 can be established
Pressure is played, realizes Ioad-sensing control function.
Optionally, tail connection further includes pressure reducing valve 3, and main oil inlet 6, internal pilot oil-feed port and inside are additionally provided on valve body 5
Guide's drain tap, the oil inlet of pressure reducing valve 3 are connected with main oil inlet 6, and oil outlet and the internal pilot oil-feed port of pressure reducing valve 3 connect
Logical, work connection of the internal pilot oil-feed port for into load sensing multi-way valve provides pilot control oil, internal pilot drain tap
It is connected with oil return opening 11, internal pilot drain tap is used to make the pilot control oil pressure release in work connection.
By joining setting pressure reducing valve 3 in tail, the pilot control that pilot control oil pressure requirement can will be met after decompression is oily
Liquid is transported to work by internal pilot oil-feed port and joins, and the main valve plug in work connection can pass through pressure reducing valve and input current signal
Electric proportional control is realized in the cooperation of size, improves the control accuracy of hydraulic system, mitigates the manipulation strength of operator；It sets in this way
It can also will join for the work combination of Hydraulic guide control in the work of electric proportional control, reduce part waste, save exploitation
Cost.
By setting pressure reducing valve 3, internal pilot oil-feed port and internal pilot drain tap, multi-way valve tail connection is made to be integrated with electric ratio
Example control, internal pilot fuel feeding, internal pilot draining and the one multiple functions of key off-load of load feedback oil circuit, simplify Hydraulic System Oil
Road, the composite move for making each executing agency of complete machine are more coherent.
Optionally, internal pilot oil-feed port includes the first oil inside offering mouth 7 and the second oil inside offering mouth 8, and the first inside supplies
Pilot control oil inlet of the 7 and second oil inside offering mouth 8 of hydraulic fluid port respectively with main valve plug both ends in work connection connects.
Optionally, work the electric proportional cartridge valve that is provided at both ends with of connection, and electric proportional cartridge valve is for controlling internal pilot to supply
Break-make between hydraulic fluid port and the pilot control oil inlet of main valve plug.
Correspondingly, internal pilot drain tap includes the first inside drain tap 9 and the second inside drain tap 10, is let out inside first
Pilot control drain tap of the 9 and second inside drain tap 10 of hydraulic fluid port respectively with main valve plug both ends in work connection connects.
Optionally, tail connection further includes oil filter 4, and oil filter 4 is connected to the oil outlet of pressure reducing valve 3.By setting oil filter
4, the sundries in fluid can be filtered, prevents oil circuit from blocking.
Optionally, pressure tap 14 is additionally provided on valve body 5, between pressure tap 14 and pressure reducing valve 3 and internal pilot oil-feed port
Connect oil circuit connection.By setting pressure tap 14, the connection oil between pressure reducing valve 3 and internal pilot oil-feed port can be detected in real time
The pressure size on road provides reference for pressure relief element, prevents oil pressure excessively high and damages oil circuit.
Optionally, external pilot drain tap 12 is additionally provided on valve body 5, external pilot drain tap 12 is connected with oil return opening 11.
By setting external pilot drain tap 12, draining approach can be increased, improve pressure release speed.
Optionally, tail connection further includes overflow valve 1, overflow valve 1 be connected to load-sensitive feedback hydraulic fluid port 13 and oil return opening 11 it
Between.By setting overflow valve 1, the problems such as can preventing oil circuit from high pressure occur, damage.
The arrangement of each oil duct in each element and valve body 5 on valve body 5 is explained below.Arrangement side described below
Formula, can be real under the premise of tail connection valve body itself structural form for not changing original multi-way valve for Hydraulic guide control
Multiple functions that existing tail connection described above has, and do not need to change and be used for clamp set by original structure
Splint position, as shown in figure 4, tail connection valve body includes three clamping plate positions, respectively first clamping plate position 41, second clamping plate position 42
With third clamping plate position 43, it can be changed without original fixture, cutter in this way, reduce waste, save development cycle and development cost.
As shown in Fig. 2, to illustrate direction as reference direction, the bottom of valve body 5 is plane, when 5 forward direction of valve body is placed, overflow
Valve 1 and switch valve 2 are separately mounted to the top left side of valve body 5 and up and down arrangement, and pressure reducing valve 3 is mounted on the top right side of valve body 5
It is and horizontally disposed.
Optionally, as shown in Fig. 2, being equipped with first passage group in valve body 5, first passage group is vertically arranged valve body 5
Load-sensitive feedback hydraulic fluid port 13 is made to be connected with the oil inlet of switch valve 2 and the oil inlet of overflow valve 1 in first flat functional.
Specifically, the first flat functional along valve body 5 left and right directions extend, first passage group include first passage 21,
Second channel 22 and third channel 23, hole link of the first passage 21 where with load-sensitive feedback hydraulic fluid port 13, second channel
22 one end is connected with first passage 21, and the other end of second channel 22 is connected with the oil inlet of switch valve 2, third channel 23 with
Second channel 22 is connected and is connected with the oil inlet of overflow valve 1.
Wherein, first passage 21 and third channel 23 are horizontally disposed, and second channel 22 is vertically arranged.First passage 21 and
Triple channel 23 is horizontal-extending to the right from the left side of valve body 5, and first passage 21 and third channel 23 are in the left side of valve body 5
Port shut.
Optionally, as shown in Fig. 2, being equipped with second channel group in valve body 5, second channel group is vertically arranged valve body 5
Main oil inlet 6 is made to be connected with pressure reducing valve oil inlet 18 in second flat functional.
Specifically, the second flat functional along valve body 5 left and right directions extend, second channel group include fourth lane 24,
25 and the 6th channel 26 of Five-channel, fourth lane 24 and main 6 place hole link of oil inlet, Five-channel 25 and fourth lane
24 connections, and connected with pressure reducing valve oil inlet 18, the 6th channel 26 is connected with Five-channel 25.
Wherein, 24 and the 6th channel 26 of fourth lane is vertically arranged, and Five-channel 25 is horizontally disposed and positioned at pressure reducing valve 3
Lower section.24 and the 6th channel 26 of fourth lane extends vertically upwards from the bottom surface of valve body 5, and 24 and the 6th channel of fourth lane
26 are shut in the port of the bottom surface of valve body 5.Five-channel 25 is horizontal-extending to the left from the right side of valve body 5, and Five-channel
25 are shut in the port of the right side of valve body 5.In fact, the 6th channel 26 only has the part tool for being located at 25 top of Five-channel
There are connection meaning, but opening up in order to facilitate duct, the 6th channel 26 is upwardly extended from the bottom surface of valve body 5.
Optionally, as shown in figure 3, being equipped with third channel group in valve body 5, third channel group is horizontally disposed valve body 5
Pressure reducing valve oil outlet 17 is made to be connected with internal pilot oil-feed port and pressure tap 14 in third flat functional.
Specifically, third flat functional extends along the left and right directions of valve body 5, and internal pilot oil-feed port is included inside first
7 and second oil inside offering mouth 8 of oil-feed port, third channel group include the 7th channel 27, the 8th channel 28, the 9th channel 29 and the tenth
Channel 30, the 7th channel 27 are connected with pressure reducing valve oil outlet 17, and the 8th channel 28 is connected with the 7th channel 27, the first oil inside offering
Mouth 7 is connected by the 9th channel 29 with the 8th channel 28, and the second oil inside offering mouth 8 is connected by the tenth channel 30 with the 8th channel 28
It is logical.14 place duct of pressure tap on valve body 5 is connected with the 9th channel 29.
Wherein, the first oil inside offering mouth 7 is arranged on the left side of the leading flank of valve body 5,7 place duct of the first oil inside offering mouth
Front and rear arrangement；Second oil inside offering mouth 8 is arranged on the right side of the leading flank of valve body 5, before and after 8 place duct of the second oil inside offering mouth
Arrangement.
7th channel 27, the 9th channel 29 and the tenth channel 30 left and right settings in the lateral cross section of valve body 5, the 7th channel
27 are arranged on the left side of pressure reducing valve 3, the front and rear setting in the lateral cross section of valve body 5 of the 8th channel 28.One end of 7th channel 27
It is connected with the oil outlet of pressure reducing valve 3, the other end is connected with the 8th channel 28, and the 7th channel 27 is horizontal along the left and right directions of valve body 5
Extension.The leading flank of 8th channel 28 from valve body 5 is horizontal-extending backward, and end of the 8th channel 28 on the leading flank of valve body 5
Mouth is shut.9th channel 29 is horizontal-extending to the right from the left side of valve body 5, and the 9th channel 29 is on the left side of valve body 5
Port shut.Tenth channel 30 is horizontal-extending to the left from the right side of valve body 5, and the tenth channel 30 is on the right side of valve body 5
It is shut port on face.Pressure tap 14 is connected from the trailing flank forward horizontal extension of valve body 5 with realizing with the 9th channel 29.
Optionally, as shown in figure 4, being additionally provided with external pilot drain tap 12 on valve body 5, fourth set is equipped in valve body 5,
Fourth set makes internal pilot drain tap and oil return opening 11 and outside first in the 4th flat functional being vertically arranged of valve body 5
Drain tap 12 is led to connect.
Specifically, the 4th flat functional extends along the left and right directions of valve body 5, and internal pilot drain tap is included inside first
9 and second inside drain tap 10 of drain tap, fourth set include the 11st channel 31, the 12nd channel 32, the tenth triple channel
33rd, the tenth four-way 34, the tenth Five-channel 35 and oil return oil pocket 16,9 place duct of the first inside drain tap and the 11st channel
31 connections, the 11st channel 31 are connected with the 12nd channel 32, and the 12nd channel 32 is connected with the tenth triple channel 33, the tenth threeway
Road 33 is connected by the tenth four-way 34 with oil return oil pocket 16, oil return oil pocket 16 and 11 place hole link of oil return opening, in second
Drain tap 10 place duct in portion's is connected with the tenth Five-channel 35, and the tenth Five-channel 35 is connected with the tenth triple channel 33.Pressure reducing valve is let out
Hydraulic fluid port 19 is also connected with the tenth triple channel 33, so that pressure reducing valve drain tap 19 is connected with oil return oil pocket 16 and oil return opening 11.
Wherein, the 12nd channel 32, the tenth four-way 34 and the tenth Five-channel 35 are vertically arranged, 31 He of the 11st channel
Tenth triple channel 33 is horizontally disposed and the 11st channel 31 passes through the tenth four-way 34, to connect be located at 5 left side of valve body first
Internal drain tap 9 and the second inside drain tap 10 positioned at 5 right side of valve body.
11st channel 31 is horizontal-extending to the right from the left side of valve body 5, and the 11st channel 31 is in the left side of valve body 5
On port shut.12nd channel 32 extends downwards vertically from the top surface of valve body 5, and the 12nd channel 32 is in valve body 5
It is shut port on top surface.Tenth triple channel 33 runs through the left side and right side of valve body 5, and the tenth triple channel 33 is in valve body
It is shut port on 5 left side and right side.It is erected downwards from the top surface of valve body 5 in 12 place duct of external pilot drain tap
Straight extension, and connected with the tenth four-way 34, it is vertical after the tenth four-way 34 and 12 place hole link of external pilot drain tap
It extends downwardly, and is connected with oil return oil pocket 16, oil return oil pocket 16 is connected with oil return opening 11.The setting area of oil return oil pocket 16 should be
It is as large as possible in allowed band, to improve oil reserve.Tenth extension vertically of Five-channel 35.
Optionally, one end of the close oil return oil pocket 16 of the tenth four-way 34 is equipped with thread segment 15, and thread segment 15 is externally provided with
Oil is stifled, prevents oil liquid leakage.The upper end of thread segment 15 is equipped with limiting end face, with the installation for facilitating oil stifled.
Optionally, as shown in figure 5, being equipped with Five-channel group in valve body 5, Five-channel group is horizontally disposed valve body 5
In five-function plane and make the oil outlet of pressure reducing valve 3 and going out for switch valve 2 in the 6th flat functional being vertically arranged of valve body 5
Hydraulic fluid port is connected with oil return opening 11.
Specifically, five-function plane is horizontal-extending along the front-rear direction of valve body 5, and the 6th flat functional is along valve body 5
Left and right directions extends vertically, and Five-channel group includes the 16th channel 36, the 17th channel 37, the 18th channel 38 and the 19th
The 39, the 16th channel 36 of channel is connected with the oil outlet of overflow valve 1, and the 16th channel 36 passes through the 17th channel 37 and oil return oil
Chamber 16 connects, and the 18th channel 38 is connected with the oil outlet of switch valve 2, and the 18th channel 38 passes through the 19th channel 39 and oil return
Oil pocket 16 connects.
Wherein, the 16th channel 36 and the front and rear arrangement of the 18th channel 38, the 17th channel 37 and the 19th channel 39
Vertical arrangement.16th channel 36 and the 18th channel 38 are from the trailing flank forward horizontal extension of valve body 5, and the 16th is logical
It is shut port of 36 and the 18th channel 38 of road on the trailing flank of valve body 5.17th channel 37 and the 19th channel 39 are
Extend vertically downwards from the top surface of valve body 5, and the port quilt of the 17th channel 37 and the 19th channel 39 on the top surface of valve body 5
It shuts.
Optionally, internal pilot oil-feed port includes the first oil inside offering mouth 7 and the second oil inside offering mouth 8, and internal pilot is let out
Hydraulic fluid port includes the first inside drain tap 9 and the second inside drain tap 10, and the first oil inside offering mouth 7 and the first inside drain tap 9 are
The left side of the leading flank of valve body 5 is arranged on, 7 place duct of the first oil inside offering mouth and 9 place duct of the first inside drain tap are equal
Front and rear arrangement and length difference, to connect different channels.Second oil inside offering mouth 8 and the second inside drain tap 10 are arranged at
The right side of the leading flank of valve body 5, the front and rear cloth in 8 place duct of the second oil inside offering mouth and 10 place duct of the second inside drain tap
It puts and length is different, to connect different channels.
In above-mentioned arrangement, by the way that each channel in each channel group is generally disposed at corresponding flat functional
On, the connection between each channel can be facilitated, simplify channel arrangement, reduce each channel opens up difficulty.Here substantially setting
It is meant that in corresponding flat functional, it is each in each channel group when cutting valve body 5 along corresponding flat functional
Channel can be cut, and the central axes for being not required for each channel are all fallen in corresponding flat functional.
Joined based on above-mentioned multi-way valve tail, the present invention also proposes a kind of electro-hydraulic proportional multi-way valve, the electro-hydraulic proportional multi-way valve
Join including above-mentioned multi-way valve tail.
Further, electro-hydraulic proportional multi-way valve further includes work connection, and main valve plug, the internal pilot of tail connection are equipped in work connection
Oil-feed port is connected with the pilot control oil inlet at main valve plug both ends, is transported with joining to provide to work connection by tail for control bound core
Dynamic guide's fluid, the internal pilot drain tap of tail connection is connected with the pilot control drain tap at main valve plug both ends, to be joined by tail
Realize guide's draining, the oil inlet quantity of the main oil inlet of multi-way valve is by electric proportional control, so that main valve plug realizes electric-hydraulic proportion control
System.
Multi-way valve tail connection and electro-hydraulic proportional multi-way valve in above-mentioned each embodiment can be applied to tunneling trolley, land leveller
Etc. in engineering machinery.
Actively technique effect is equally applicable to electro-hydraulic proportional multi-way possessed by multi-way valve tail connection in above-mentioned each embodiment
Valve, which is not described herein again.
The work of one embodiment of 1~5 pair of multi-way valve tail connection and electro-hydraulic proportional multi-way valve of the present invention below in conjunction with the accompanying drawings
Process illustrates：
As shown in Figure 1, overflow valve 1, switch valve 2, pressure reducing valve 3 and oil filter 4 are integrated into tail connection by multi-way valve tail connection
Inside valve body 5, tail connection sets main oil inlet P, load-sensitive feedback hydraulic fluid port Ls, oil return inlet T, the first oil inside offering mouth Va, second
Oil inside offering mouth Vb, pressure tap V, the first inside drain tap La, the second inside drain tap Lb and external pilot drain tap L.Pass through
The hydraulic oil that proportionally exports of control size of current enters pressure reducing valve 3 by main oil inlet P, by pressure reducing valve 3 decompression and
After the filtering of oil filter 4, into internal pilot oil supply gallery, by the first oil inside offering mouth Va, the second oil inside offering mouth Vb with
The pilot control oil inlet connection at the main valve plug both ends of work connection, the pilot control drain tap and tail at work connection main valve plug both ends join
The first inside drain tap La, the second inside drain tap Lb be connected, the first inside drain tap La, the second inside drain tap Lb pass through
Internal pilot drain path is connected with oil return inlet T and external pilot drain tap L.Electric proportional control is depressurized, internal pilot fuel feeding,
The functions such as internal pilot draining, the one key off-load of load feedback oil circuit are all integrated into tail connection, so as to fulfill that will be used for hydraulic pilot
The purpose of the oil inlet connection and work connection of multi-way valve applied to electric proportional control is controlled, joins component by changing tail, realizes hydraulic pressure
Pilot-controlled multi-way valve is to the direct upgrading of electric proportional control multi-way valve.
As shown in Fig. 2, the multiple channels of setting in valve body 5, are used to implement the decompression of electric proportional control fuel feeding, internal pilot supplies
Oil, internal pilot draining, one key unloading function of load feedback oil circuit.In sectional view as shown in Figure 2, fuel feeding decompression leads to
Fourth lane 24 in 5 inner right side of valve body, 25 and the 6th channel 26 of Five-channel are crossed, the hydraulic oil of main oil inlet 6 is introduced
Pressure reducing valve oil inlet 18, high-voltage oil liquid enter after pressure reducing valve oil inlet 18 through over-subtraction buckling into guide's fluid, realize fuel feeding decompression.
One key unloading function of load feedback oil circuit in valve body 5 by setting switch valve 2 to realize, as shown in Figure 1, switch valve
2 must not be connected during electricity in normal open state, Ls pressure signal fluid with oil return inlet T, and Ls no pressures, electric proportional multi-way valve is in
Middle position unloading condition；When switch valve 2 must be electric, Ls fluid is disconnected with oil return inlet T, and Ls can establish pressure, realizes load-sensitive
Function.As shown in Fig. 2, left side setting first passage 21, second channel 22 and third channel 23 in valve body 5, anti-by load-sensitive
Feedback hydraulic fluid port 13 is connected with the oil inlet of switch valve 2；As shown in figure 5, the oil outlet of overflow valve 1 passes through the 16th channel 36 and the tenth
Seven channels 37 are connected with oil return oil pocket 16 and oil return opening 11, and the oil outlet of switch valve 2 is logical by the 18th channel the 38 and the 19th
Road 39 is connected with oil return oil pocket 16 and oil return opening 11, realizes the oil outlet of the oil outlet switch valve 2 of overflow valve 1 and oil return opening 11
A key unloading function is realized in connection.
In internal pilot oil supply gallery sectional view as shown in Figure 3, pass through the 7th channel 27 of setting, the in the valve body 5
Eight channels 28, the 9th channel 29 and the tenth channel 30, guide's fluid that pressure reducing valve 3 is exported introduce 7 He of the first oil inside offering mouth
Second oil inside offering mouth 8 realizes internal pilot oil supply function.9th channel 29 is arranged on the rear of overflow valve 1 and switch valve 2,
And with the tenth channel 30 not point-blank, overflow valve 1 and switch valve 2 can be avoided.
In internal pilot drain path sectional view as shown in Figure 4, the pilot control oil at main valve plug both ends in work connection
By the first inside drain tap 9 and the second inside drain tap 10, by valve body 5 the 11st channel 31, the 12nd channel 32,
Tenth triple channel 33, the tenth four-way 34 and the tenth Five-channel 35 introduce oil return oil pocket 16, real into the oil return opening 11 of valve body 5
Existing internal pilot draining；Pressure reducing valve drain tap 19 is made to be connected with oil return oil pocket 16 simultaneously, realize the control terminal draining of pressure reducing valve 3.
Wherein, the depth in 7 place duct of the first oil inside offering mouth is smaller than the depth in 9 place duct of the first inside drain tap, and the 11st is logical
Road 31 intersects with 9 place duct of the first inside drain tap, but non-intersect with 7 place duct of the first oil inside offering mouth；Inside second
The depth in 8 place duct of oil-feed port is smaller than the depth in 10 place duct of the second inside drain tap, in the tenth Five-channel 35 and second
Drain tap 10 place duct in portion's is intersected, but non-intersect with 8 place duct of the second oil inside offering mouth.
Multi-way valve tail connection also has external pilot oil draining function, and the lower end of the tenth four-way 34 is threaded section 15, in spiral shell
Increase oil at line section 15 to block up, guide's draining can be flowed out from external pilot drain tap 12.
Pass through the explanation to multi-way valve tail of the present invention connection and multiple embodiments of electro-hydraulic proportional multi-way valve, it can be seen that this hair
Bright multi-way valve tail connection and electro-hydraulic proportional multi-way valve embodiment at least have the advantages that one or more of：
1st, the unloading function of load feedback oil circuit is integrated on tail connection, is conducive to multi-way valve where simplifying tail connection other
The structure of connection makes the arrangement of control oil circuit that other join also more convenient, reduces difficulty of processing；
2nd, by setting pressure reducing valve, internal pilot oil-feed port and internal pilot drain tap, it is also integrated with multi-way valve tail connection
The function of electric proportional control decompression, internal pilot fuel feeding and internal pilot draining is further simplified the oil circuit arrangement of other connection；
3rd, on the basis of original multi-way valve tail connection for Hydraulic guide control, pass through the reasonable Arrangement to internal galleries
And design, tail connection is made to can be used in electrical-liquid control multi-way valve, electrical-liquid control can simplify hydraulic system oil circuit, mitigate
Operator's manipulation strength improves HYDRAULIC CONTROL SYSTEM precision, and does not need to replace original fixture and splint position, saves
The tools such as fixture and cutter are put into, and save development cycle and the cost of electro-hydraulic proportional multi-way valve.
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, those of ordinary skills in the art should understand that：Still
It can modify to the specific embodiment of the present invention or equivalent replacement is carried out to some technical characteristics；Without departing from this hair
The spirit of bright technical solution should all cover in the claimed technical solution range of the present invention.
Claims (18)
1. a kind of multi-way valve tail connection, which is characterized in that including valve body (5), the valve body (5) is equipped with load-sensitive and feeds back hydraulic fluid port
(13) it is selectively connected with the oil return opening (11) with oil return opening (11), the load-sensitive feedback hydraulic fluid port (13).
2. multi-way valve tail connection according to claim 1, which is characterized in that the tail connection further includes switch valve (2), described to open
Valve (2) is closed to be connected between load-sensitive feedback hydraulic fluid port (13) and oil return opening (11).
3. multi-way valve tail connection according to claim 1, which is characterized in that the tail connection further includes pressure reducing valve (3), the valve
Main oil inlet (6), internal pilot oil-feed port and internal pilot drain tap, the oil inlet of the pressure reducing valve (3) are additionally provided on body (5)
It is connected with the main oil inlet (6), the oil outlet of the pressure reducing valve (3) is connected with the internal pilot oil-feed port, the inside
Work connection of guide's oil-feed port for into load sensing multi-way valve provides pilot control oil, the internal pilot drain tap and institute
Oil return opening (11) connection is stated, the internal pilot drain tap is used to make the pilot control oil pressure release in the work connection.
4. multi-way valve tail connection according to claim 3, which is characterized in that the internal pilot oil-feed port is included inside first
Oil-feed port (7) and the second oil inside offering mouth (8), the first oil inside offering mouth (7) and the second oil inside offering mouth (8) are respectively
It is connected with the pilot control oil inlet at main valve plug both ends in work connection.
5. multi-way valve tail connection according to claim 3, which is characterized in that the internal pilot drain tap is included inside first
Drain tap (9) and the second inside drain tap (10), first inside drain tap (9) and second inside drain tap (10) point
Pilot control drain tap not with main valve plug both ends in work connection connects.
6. multi-way valve tail connection according to claim 3, which is characterized in that the tail connection further includes oil filter (4), the filter
Oily device (4) is connected to the oil outlet of the pressure reducing valve (3).
7. multi-way valve tail connection according to claim 3, which is characterized in that pressure tap (14) is additionally provided on the valve body (5),
Connection oil circuit connection between the pressure tap (14) and the pressure reducing valve (3) and the internal pilot oil-feed port.
8. multi-way valve tail connection according to claim 1, which is characterized in that be additionally provided with external pilot on the valve body (5) and let out
Hydraulic fluid port (12), the external pilot drain tap (12) connect with the oil return opening (11).
9. multi-way valve tail connection according to claim 1, which is characterized in that the tail connection further includes overflow valve (1), described to overflow
Stream valve (1) is connected between load-sensitive feedback hydraulic fluid port (13) and oil return opening (11).
10. multi-way valve tail connection according to claim 3, which is characterized in that the tail connection further includes overflow valve (1) and switch
Valve (2), the bottom of the valve body (5) is plane, when valve body (5) forward direction is placed, the overflow valve (1) and the switch valve
(2) top left side of the valve body (5) and up and down arrangement are separately mounted to, the pressure reducing valve (3) is mounted on the valve body (5)
Top right side and horizontally disposed.
11. multi-way valve tail connection according to claim 10, which is characterized in that first passage group is equipped in the valve body (5),
The first passage group makes the load-sensitive feedback hydraulic fluid port in the first flat functional being vertically arranged of the valve body (5)
(13) oil inlet with the oil inlet of the switch valve (2) and the overflow valve (1) connects.
12. multi-way valve tail connection according to claim 10, which is characterized in that second channel group is equipped in the valve body (5),
The second channel group makes the main oil inlet (6) and decompression in the second flat functional being vertically arranged of the valve body (5)
Valve oil inlet (18) connects.
13. multi-way valve tail connection according to claim 10, which is characterized in that be additionally provided with pressure tap on the valve body (5)
(14), third channel group is equipped in the valve body (5), the third channel group is in the horizontally disposed third of the valve body (5)
Pressure reducing valve oil outlet (17) is made to be connected with the internal pilot oil-feed port and the pressure tap (14) in flat functional.
14. multi-way valve tail connection according to claim 10, which is characterized in that be additionally provided with external pilot on the valve body (5)
Drain tap (12), the valve body (5) is interior to be equipped with fourth set, and the fourth set is vertically arranged the valve body (5)
The 4th flat functional on make the internal pilot drain tap and the oil return opening (11) and the external pilot drain tap (12)
Connection.
15. multi-way valve tail connection according to claim 10, which is characterized in that Five-channel group is equipped in the valve body (5),
The Five-channel group is vertically arranged with the valve body (5) in the horizontally disposed five-function plane of the valve body (5)
The 6th flat functional on make the pressure reducing valve (3) oil outlet and the switch valve (2) oil outlet with the oil return opening
(11) it connects.
16. multi-way valve tail connection according to claim 3, which is characterized in that the internal pilot oil-feed port is included in first
Portion's oil-feed port (7) and the second oil inside offering mouth (8), the internal pilot drain tap include the first inside drain tap (9) and second
Internal drain tap (10), the first oil inside offering mouth (7) and first inside drain tap (9) are arranged at the valve body
(5) left side of leading flank, hole where duct where the first oil inside offering mouth (7) and first inside drain tap (9)
The front and rear arrangement in road and length difference, to connect different channels；And/or the second oil inside offering mouth (8) and described second
Internal drain tap (10) is arranged at the right side of the leading flank of the valve body (5), duct where the second oil inside offering mouth (8)
It is arranged before and after equal with duct where second inside drain tap (10) and length is different, to connect different channels.
17. a kind of electro-hydraulic proportional multi-way valve, which is characterized in that including such as claim 1~16 any one of them multi-way valve tail
Connection.
18. electro-hydraulic proportional multi-way valve according to claim 17, which is characterized in that the electro-hydraulic proportional multi-way valve further includes
Work connection, the work connection is interior to be equipped with main valve plug, the internal pilot oil-feed port of the tail connection and the guide at the main valve plug both ends
Oil inlet connection is controlled, joins the guide oil provided for the main valve plug to be controlled to move to join by the tail to the work
Liquid, the internal pilot drain tap of the tail connection is connected with the pilot control drain tap at the main valve plug both ends, to pass through the tail
Connection realizes guide's draining, and the oil inlet quantity of the main oil inlet of the multi-way valve is by electric proportional control, so that the main valve plug is realized
Electrical-liquid control.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711455380.8A CN108194441B (en) | 2017-12-28 | 2017-12-28 | Multi-way valve tail connection and electro-hydraulic proportional multi-way valve |
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| CN201711455380.8A CN108194441B (en) | 2017-12-28 | 2017-12-28 | Multi-way valve tail connection and electro-hydraulic proportional multi-way valve |
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| CN108194441B CN108194441B (en) | 2024-02-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109707690A (en) * | 2019-01-18 | 2019-05-03 | 江苏汇智高端工程机械创新中心有限公司 | Electric proportional load sensitive multi-way valve integrated with hydraulic lock |
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| CN108194441B (en) | 2024-02-02 |
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