CN108518374A - Unloading electromagnetic valve - Google Patents
Unloading electromagnetic valve Download PDFInfo
- Publication number
- CN108518374A CN108518374A CN201810653444.3A CN201810653444A CN108518374A CN 108518374 A CN108518374 A CN 108518374A CN 201810653444 A CN201810653444 A CN 201810653444A CN 108518374 A CN108518374 A CN 108518374A
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- China
- Prior art keywords
- valve
- guide
- channel
- unloading
- oil
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/024—Pressure relief valves
Abstract
The invention discloses a kind of unloading electromagnetic valves, including：Valve body, first passage, second channel and third channel are defined in valve body, first passage interconnects with second channel and third channel and is spaced apart setting, valve body is equipped with the guide's oil return circuit being connected with the second channel and pilot control oil circuit, and valve body is equipped with the control oil oil circuit being connected to third channel；Two-way plug-in valve is connected to first passage, and two-way plug-in valve is movable to control the break-make of first passage and external oil circuit；At least part of guide's unloading valve is located in second channel, and guide's unloading valve is movable to control the break-make of pilot control oil circuit and guide's oil return circuit；At least part of electromagnet cut off valve is located in third channel, and electromagnet cut off valve is powered movable to control the break-make of pilot control oil circuit and guide's oil return circuit.Unloading electromagnetic valve according to the ... of the embodiment of the present invention can not only realize arbitrary completion pressure off-load and remote pressure unloading function, and simple in structure, and good appearance is widely used.
Description
Technical field
The present invention relates to big flow plug-in unloading electromagnetic valve technical fields, more particularly, to a kind of unloading electromagnetic valve.
Background technology
Currently, hydraulic cartridge valve in the prior art, is the control by pilot valve to inserting valve core, to realize control
System inserting threshold switch function, in this case can only individually to the flow of system carry out commutation control, cannot simultaneously and its
Its inserted valve realizes unloading function, when hydraulic system needs some valve first to act and another valve moves again after reach certain pressure
It just cannot achieve when making, two inserted valve of this hydraulic pressure cannot play the function of pressure release and remote control pressure.
Invention content
The present invention is directed at least solve one of the technical problems existing in the prior art.
For this purpose, the present invention proposes that a kind of unloading electromagnetic valve, the unloading electromagnetic valve reasonable design, good appearance can be realized
Remote control.
The unloading electromagnetic valve of embodiment according to a first aspect of the present invention, including：It is logical to define first in the valve body for valve body
Road, second channel and third channel, the first passage are interconnected and are spaced with the second channel and the third channel
It opens up and sets, the valve body is equipped with the guide's oil return circuit being connected to the second channel and pilot control oil circuit, the valve body are set
There is the control oil oil circuit being connected to the third channel；Two-way plug-in valve, the two-way plug-in valve are connected to the first passage,
The two-way plug-in valve is movable to control the break-make of the first passage and external oil circuit；Guide's unloading valve, the guide unload
At least part of lotus valve is located in the second channel, and guide's unloading valve is movable to control the pilot control oil circuit
With the break-make of guide's oil return circuit；Electromagnet cut off valve, at least part of the electromagnet cut off valve are located at the third and lead to
In road, the electromagnet cut off valve is powered movable to control the break-make of the pilot control oil circuit and guide's oil return circuit.
Unloading electromagnetic valve according to the ... of the embodiment of the present invention, by limiting first passage, second channel and in valve body
Triple channel, two-way plug-in valve, guide's unloading valve and electromagnet cut off valve are respectively provided in first passage, second channel and third channel
And cooperate to control the break-make of guide's oil return circuit, pilot control oil circuit and the oily oil circuit of control, the unloading electromagnetic valve is not only
It can realize arbitrary completion pressure off-load and remote pressure unloading function, and simple in structure, good appearance, small, pressure
Lose it is small, it is multiple functional, it is securely and reliably, easy to operate, be widely used.
Unloading electromagnetic valve according to the above embodiment of the present invention can also have following additional technical characteristic：
According to one embodiment of present invention, the first passage and the third channel are located at opposite the two of the valve body
End and be coaxially disposed, the second channel be located at the side of the valve body and positioned at the first passage and the third channel it
Between, the axis of the second channel is perpendicular to the first passage and the third channel.
According to one embodiment of present invention, oil pressure of the guide's unloading valve in the pilot control oil circuit is more than pre-
It is opened when definite value, the pilot control oil circuit is connected to guide's oil return circuit, the high pressure oil in the pilot control oil circuit
The first passage is flowed by guide's oil return circuit, the second channel and opens the two-way plug-in valve, described the
One channel is with external oil communication so that pressure oil and external oil communication.
According to one embodiment of present invention, guide's unloading valve includes：Guide's off-load valve pocket, guide's unloading valve
It covers and is located in the second channel along the axially extending of the second channel, define and be formed as in guide's off-load valve pocket
Columnar first valve chamber, first valve chamber be located between the pilot control oil circuit and guide's oil return circuit and respectively with
The pilot control oil circuit is connected to guide's oil return circuit；Pilot control spool, the pilot control spool are located at described
It is driven between pilot control oil oil circuit and guide's oil return circuit and by the pressure oil in the pilot control oil circuit；Unloading valve
Core, the off-load spool are movably located in first valve chamber along the axial direction of first valve chamber to control guide's control
The break-make on liquefaction road and guide's oil return circuit, the off-load spool and the position of the pilot control spool think it is corresponding with by
The pilot control spool driving.
According to one embodiment of present invention, guide's unloading valve further includes：Valve seat, the valve seat are located at the guide
One end opposite with the pilot control spool of off-load valve pocket；Guide's spring, guide's spring are located at first valve chamber
Interior, the off-load spool is only supported in one end of guide's spring, and the other end of guide's spring only supports the valve seat, the elder generation
Guided missile spring sets pressure initiation as the predetermined value.
According to one embodiment of present invention, guide's unloading valve further includes：Adjusting screw rod, the adjusting screw rod are located at
The valve seat is only supported in outside guide's off-load valve pocket and one end of the adjusting screw rod, and the adjusting screw rod is for adjusting the valve
The position of seat is to adjust the setting pressure of guide's spring.
According to one embodiment of present invention, guide's unloading valve further includes：Locking nut, the locking nut are located at
The other end of the adjusting screw rod is with the fixation adjusting screw rod.
According to one embodiment of present invention, the two-way plug-in valve includes：Main valve housing, define in the main valve housing with
The first passage is coaxial and is formed as columnar second valve chamber；Main valve plug, the main valve plug are formed as column and along described
The axial direction of two valve chambers is movably located in second valve chamber, defines that be formed towards described first logical in the main valve plug
The spring cavity of the open at one end in road；Main spool spring, the main spool spring are telescopically located at described along the axial direction of the spring cavity
In spring cavity, one end of the main spool spring is connected with the main valve plug, the other end of the main spool spring and the valve body phase
Even；Valve deck, the valve deck are formed as hollow columnar, one end of the valve deck be set in one end of the main valve housing and the other end with
The valve body is connected.
According to one embodiment of present invention, the electromagnet cut off valve includes：Electromagnet cut off valve set, the electromagnet cut off valve
It defines coaxial with the third channel in set and is formed as columnar third valve chamber, one end of the electromagnet cut off valve set is located at
In the third channel；End spool, the shut-off valve in-core, which defines, is formed as columnar cone valve core cavity, the cut-off spool
It is located in the third valve chamber；One end of poppet valve core, the poppet valve core is formed as taper and is located at the poppet valve core intracavitary；Iron
Core, the iron core are located in the third valve chamber and are oppositely arranged with the poppet valve core, and one end of the iron core is formed as notch
To be set on the other end of the poppet valve core；Electromagnet, it is described to be set in define column mounting hole in the electromagnet
The other end of electromagnet cut off valve, the electromagnet are connected with circuit.
According to one embodiment of present invention, one end of the cut-off spool is equipped with the throttling being connected to the second channel
Hole.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination following accompanying drawings to embodiment
Obviously and it is readily appreciated that, wherein：
Fig. 1 is the structural schematic diagram of middle unloading electromagnetic valve according to embodiments of the present invention.
Reference numeral：
Unloading electromagnetic valve 100；
Valve body 10；Guide's oil return circuit 11；Pilot control oil circuit 12；Control oil oil circuit 13；
Two-way plug-in valve 20；Main valve housing 21；Main valve plug 22；Main spool spring 23；Valve deck 24；
Guide's unloading valve 30；Guide's off-load valve pocket 31；Pilot control spool 32；Off-load spool 33；Valve seat 34；Guide's spring
35；Adjusting screw rod 36；Locking nut 37；Spring base 38；
Electromagnet cut off valve 40；Electromagnet cut off valve set 41；End spool 42；Poppet valve core 43；Iron core 44；Electromagnet 45；Throttling
Hole 46.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on ... shown in the drawings or
Position relationship is merely for convenience of description of the present invention and simplification of the description, and does not indicate or imply the indicated device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.In addition, limit
There is the feature of " first ", " second " to can explicitly or implicitly include one or more this feature surely.The present invention's
In description, unless otherwise indicated, the meaning of " plurality " is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
Can also be electrical connection to be mechanical connection；It can be directly connected, can also indirectly connected through an intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Unloading electromagnetic valve 100 according to the ... of the embodiment of the present invention is specifically described below in conjunction with the accompanying drawings.
As shown in Figure 1, unloading electromagnetic valve 100 according to the ... of the embodiment of the present invention includes valve body 10, two-way plug-in valve 20, guide
Unloading valve 30 and electromagnet cut off valve 40.
Specifically, defining first passage, second channel and third channel, first passage and second channel in valve body 10
Setting is interconnected and is spaced apart with third channel, and valve body 10 is equipped with the guide's oil return circuit 11 being connected with the second channel and guide
Oil circuit 12 is controlled, valve body 10 is equipped with the control oil oil circuit 13 being connected to third channel, and two-way plug-in valve 20 is connected to first passage,
Two-way plug-in valve 20 is movable to control the break-make of first passage and external oil circuit, and at least part of guide's unloading valve 30 is located at
In second channel, guide's unloading valve 30 is movable to control the break-make of pilot control oil circuit 12 and guide's oil return circuit 11, electromagnetism
At least part of shut-off valve 40 is located in third channel, and electromagnet cut off valve 40 is powered movable to control pilot control oil circuit 12
With the break-make of guide's oil return circuit 11.
In other words, unloading electromagnetic valve 100 according to the ... of the embodiment of the present invention is mainly by valve body 10, two-way plug-in valve 20, guide
Unloading valve 30 and electromagnet cut off valve 40 form.Wherein, it is logical to define first inside valve body 10 respectively in three different directions
Road, second channel and third channel, first passage interconnect with second channel and third channel and are spaced apart setting, valve body 10
Inside it is additionally provided with guide's oil return circuit 11, pilot control oil circuit 12 and the oily oil circuit 13 of control, guide's oil return circuit 11 and pilot control
Oil circuit 12 is connected with the second channel respectively, and at least part of guide's unloading valve 30 is located in second channel, guide's unloading valve 30
The break-make of pilot control oil circuit 12 and guide's oil return circuit 11 can be controlled, oily oil circuit 13 is controlled and is connected to third channel, two-way
Inserted valve 20 is connected to first passage, and two-way plug-in valve 20 is movable to control the break-make of first passage and external oil circuit, electromagnetism
At least part of shut-off valve 40 is located in third channel, and the energization of electromagnet cut off valve 40 can control pilot control oil circuit 12 and elder generation
Lead the break-make of oil return circuit 11.
At work, high pressure external control fluid passes through pilot control oil circuit to unloading electromagnetic valve 100 according to the ... of the embodiment of the present invention
12 flow into guide's unloading valve 30, when the oil pressure of pressure oil in pilot control oil circuit 12 is more than the setting pressure of guide's unloading valve 30
Guide's unloading valve 30 is opened, pilot control oil circuit 12 is connected to guide's oil return circuit 11, and two-way plug-in valve 20 is pushed away pressure oil
Dynamic lower opening, pressure oil flows into oil return box with external oil circuit, to realize remote pressure control function.When pilot control oil circuit 12
When the oil pressure of interior pressure oil is less than the setting pressure of guide's unloading valve 30, guide's unloading valve 30 is closed, and two-way plug-in valve 20 is realized
The closing of No leakage.
The energization of electromagnet cut off valve 40 can control pilot control oil circuit 12 and is connected to guide's oil return circuit 11, at this point, formerly
It leads in control oil circuit 12 under high pressure oil effect, electromagnet cut off valve 40 is opened, and is switched under pressure in guide's unloading valve 30 to realize
It is arbitrary to complete pressure unloading control function.
Unloading electromagnetic valve 100 according to the ... of the embodiment of the present invention as a result, by limiting first passage, in valve body 10
Two channels and third channel, two-way plug-in valve 20, guide's unloading valve 30 and electromagnet cut off valve 40 are respectively provided at first passage, second
In channel and third channel and cooperate to control the break-make of guide's oil return circuit, pilot control oil circuit and the oily oil circuit of control,
The unloading electromagnetic valve 100 can not only realize arbitrary completion pressure off-load and remote pressure unloading function, and simple in structure, outside
Shape is beautiful, and small, the pressure loss is small, multiple functional, securely and reliably, easy to operate, is widely used.
As shown in Figure 1, some specific embodiments according to the present invention, first passage and third channel are located at the phase of valve body 10
To both ends and coaxial arrangement, second channel is located at the side of valve body 10 and between first passage and third channel, and second is logical
The axis in road is perpendicular to first passage and third channel.The valve body 10 is simple in structure as a result, good appearance, convenient for control.
In certain specific embodiments of the invention, oil pressure of the guide's unloading valve 30 in pilot control oil circuit 12 is more than
It is opened when predetermined value, pilot control oil circuit 12 is connected to guide's oil return circuit 11, and the high pressure oil in pilot control oil circuit 12 passes through
Guide's oil return circuit 11, second channel flow into first passage and open two-way plug-in valve 20, first passage and external oil communication
So that remote pressure control function may be implemented in pressure oil and external oil communication, the unloading electromagnetic valve 100.
Preferably, guide's unloading valve 30 includes guide's off-load valve pocket 31, pilot control spool 32 and off-load spool 33.
Specifically, guide's off-load valve pocket 31 is located at along the axially extending of second channel in second channel, guide's off-load
It is defined in valve pocket 31 and is formed as columnar first valve chamber, the first valve chamber is located at pilot control oil circuit 12 and guide's oil return circuit 11
Between and be connected to respectively with pilot control oil circuit 12 and guide's oil return circuit 11, pilot control spool 32 be located at pilot control oil oil
It is driven between road 13 and guide's oil return circuit 11 and by the pressure oil in pilot control oil circuit 12, off-load spool 33 is along the first valve chamber
Axial direction be movably located in the first valve chamber to control the break-make of pilot control oil circuit 12 and guide's oil return circuit 11, unloading valve
Core 33 is thought corresponding to be driven by pilot control spool 32 with the position of pilot control spool 32.
According to one embodiment of present invention, guide's unloading valve 30 further includes valve seat 34 and guide's spring 35.
Specifically, valve seat 34 is located at one end opposite with pilot control spool 32 of guide's off-load valve pocket 31, guide's spring
35 are located in the first valve chamber, and lotus spool 33 is only resisted in one end of guide's spring 35, and the other end of guide's spring 35 only supports valve seat 34,
Guide's spring 35 sets pressure initiation as predetermined value.As a result, by the way that the pressure of guide's spring 35 is arranged, can rationally adjust
Control the oil pressure size that guide's unloading valve 30 opens and closes.
In one embodiment of the invention, guide's unloading valve 30 further includes adjusting screw rod 36, and adjusting screw rod 36 is located at elder generation
It leads outside off-load valve pocket 31 and valve seat 34 is only supported in one end of adjusting screw rod 36, adjusting screw rod 36 is used for the position of regulating valve seat 34 to adjust
Save the setting pressure of guide's spring 35.Optionally, guide's unloading valve 30 further includes locking nut 37, and locking nut 37 is located at adjusting
The other end of screw rod 36 is with secured adjusted screw rod 36.It, can letter as a result, by the cooperation of locking nut 37 and adjusting screw rod 36
Setting pressure that is single, quickly adjusting guide's spring 35.
According to one embodiment of present invention, two-way plug-in valve 20 includes main valve housing 21, main valve plug 22,23 and of main spool spring
Valve deck 24.
Specifically, defining coaxial with first passage in main valve housing 21 and being formed as columnar second valve chamber, main valve plug
22 are formed as column and are movably located in the second valve chamber along the axial direction of the second valve chamber, are defined in main valve plug 22 and are formed as court
To the spring cavity of the open at one end of first passage, main spool spring 23 is telescopically located in spring cavity along the axial direction of spring cavity, main
One end of valve spring 23 is connected with main valve plug 22, and the other end of main spool spring 23 is connected with valve body 10, and valve deck 24 is formed as hollow
One end of column, valve deck 24 is set in one end of main valve housing 21 and the other end is connected with valve body 10.
During the work time, when high pressure external control fluid by pilot control oil oil circuit 13 on pilot control valve core 32, first
Lead control spool 32 pushes off-load spool 33 to lift off a seat 34 when high pressure oil sets pressure higher than guide's spring 35, two-way inserting
The high pressure oil of the main valve plug spring cavity of valve 20 is communicated with guide's oil return circuit 11, and at this moment the pressure of 22 spring cavity of main valve plug is zero,
Main valve plug 22 is opened under the promotion of pressure oil, and pressure oil enters oil return box, to realize that remote pressure control function, guide are unloaded
Lotus valve 30 is additionally provided with spring base 38 to support guide's spring 35, when 13 pressure of pilot control oil oil circuit is set less than guide's spring 35
When pressure, 35 push the spring 38 of guide's spring makes off-load spool 33 close, and makes 22 dead-tight closing of main valve plug.
Preferably, electromagnet cut off valve 40 includes electromagnet cut off valve set 41, cut-off spool 42, poppet valve core 43, iron core 44 and electricity
Magnet 45.
Specifically, it defines coaxial with third channel in electromagnet cut off valve set 41 and is formed as columnar third valve chamber, electricity
One end of magnetic cut-off valve pocket 41 is located in third channel, is defined in cut-off spool 42 and is formed as 43 chamber of columnar poppet valve core, cut
Only spool 42 is located in third valve chamber, and one end of poppet valve core 43 is formed as taper and is located at 43 intracavitary of poppet valve core, and iron core 44 is located at
It is oppositely arranged in third valve chamber and with poppet valve core 43, one end of iron core 44 is formed as notch to be set in the other end of poppet valve core 43
On, column mounting hole is defined in electromagnet 45 to be set in the other end of electromagnet cut off valve 40, electromagnet 45 is connected with circuit.
Preferably, one end of cut-off spool 42 is equipped with the throttle orifice 46 being connected with the second channel.
In work process, 40 electromagnet 45 of electromagnet cut off valve is powered, and iron core 44 drives poppet valve core 43 to move up, guide
The oily oil circuit 13 of control is connected to by throttle orifice 46 with guide's oil return circuit 11, is acted at this time in 13 high pressure oil of pilot control oil oil circuit
Lower cut-off spool 42 is opened, and pressure unloading control function can be completed under 30 arbitrary pressure of guide's unloading valve to realize.
To sum up, the object of the present invention is to provide unloading electromagnetic valve 100, which inserts for big flow
In the second channel by the installation of guide's unloading valve 30, and guide's spring of pressure regulation is arranged in 10 side of valve body in formula unloading electromagnetic valve
35 and adjusting screw rod 36 and locking nut 37, the high pressure oil in system is applied to by control mouth on pilot control spool 32, by force
System opens guide's unloading valve 30, and the forefront pressure oil of main valve plug 22 enters main valve plug spring cavity by controlling oily oil circuit 13, due to
Guide's unloading valve 30 is opened, and so that the pressure oil of 22 spring cavity of main valve plug is flowed into guide's oil return circuit 11, main valve plug 22 is made to open, when
After the pressure of control port loses, guide's unloading valve 30 is closed, and main valve plug 22 is also switched off；When the pressure oil of 22 spring cavity of main valve plug
After the pressure set higher than guide's spring 35, the movement of poppet valve core 43 is opened, and the high pressure oil of 22 front end of main valve plug pushes main valve plug 22
It opens, otherwise main valve plug 22 is closed, to realize the purpose of hydraulic system pressure remote adjustment function.
Unloading electromagnetic valve 100 according to the ... of the embodiment of the present invention, by limiting first passage, second channel in valve body 10
And third channel, two-way plug-in valve 20, guide's unloading valve 30 and electromagnet cut off valve 40 be respectively provided at first passage, second channel and
In third channel and cooperate to control the break-make of guide's oil return circuit 11, pilot control oil circuit 12 and control oil oil circuit 13,
The unloading electromagnetic valve 100 can not only realize arbitrary completion pressure off-load and remote pressure unloading function, and simple in structure, outside
Shape is beautiful, and small, the pressure loss is small, multiple functional, securely and reliably, easy to operate, is widely used.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means specific features described in conjunction with this embodiment or example, knot
Structure, material or feature are included at least one embodiment or example of the invention.In the present specification, to above-mentioned term
Schematic representation may not refer to the same embodiment or example.Moreover, specific features, structure, material or the spy of description
Point can be combined in any suitable manner in any one or more of the embodiments or examples.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of being detached from the principle of the present invention and objective a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The range of invention is limited by claim and its equivalent.
Claims (10)
1. a kind of unloading electromagnetic valve, which is characterized in that including：
Valve body, first passage, second channel and third channel are defined in the valve body, and the first passage is logical with described second
Road and the third channel interconnect and are spaced apart setting, and the valve body is equipped with the guide's oil return being connected to the second channel
Oil circuit and pilot control oil circuit, the valve body are equipped with the control oil oil circuit being connected to the third channel；
Two-way plug-in valve, the two-way plug-in valve are connected to the first passage, and the two-way plug-in valve is movable to control
State the break-make of first passage and external oil circuit；
At least part of guide's unloading valve, guide's unloading valve is located in the second channel, and guide's unloading valve can
Activity is to control the break-make of the pilot control oil circuit and guide's oil return circuit；
At least part of electromagnet cut off valve, the electromagnet cut off valve is located in the third channel, and the electromagnet cut off valve is logical
Electricity is movable to control the break-make of the pilot control oil circuit and guide's oil return circuit.
2. unloading electromagnetic valve according to claim 1, which is characterized in that the first passage and the third channel are located at
The opposite end and coaxial arrangement, the second channel of the valve body are located at the side of the valve body and are located at the first passage
Between the third channel, the axis of the second channel is perpendicular to the first passage and the third channel.
3. unloading electromagnetic valve according to claim 1, which is characterized in that guide's unloading valve is in pilot control oil
Oil pressure in road is opened when being more than predetermined value, and the pilot control oil circuit is connected to guide's oil return circuit, guide's control
High pressure oil in liquefaction road flows into the first passage by guide's oil return circuit, the second channel and opens described two
Logical inserted valve, the first passage is with external oil communication so that pressure oil and external oil communication.
4. unloading electromagnetic valve according to claim 3, which is characterized in that guide's unloading valve includes：
Guide's off-load valve pocket, guide's off-load valve pocket are located at the second channel along the axially extending of the second channel
It is interior, it is defined in guide's off-load valve pocket and is formed as columnar first valve chamber, first valve chamber is located at the pilot control
It is connected between oil circuit and guide's oil return circuit and respectively with the pilot control oil circuit and guide's oil return circuit；
Pilot control spool, the pilot control spool are located between the pilot control oil oil circuit and guide's oil return circuit
And it is driven by the pressure oil in the pilot control oil circuit；
Off-load spool, the off-load spool are movably located in first valve chamber along the axial direction of first valve chamber to control
The break-make of the pilot control oil circuit and guide's oil return circuit, the position of the off-load spool and the pilot control spool
Think corresponding to be driven by the pilot control spool.
5. unloading electromagnetic valve according to claim 4, which is characterized in that guide's unloading valve further includes：
Valve seat, the valve seat are located at one end opposite with the pilot control spool of guide's off-load valve pocket；
Guide's spring, guide's spring are located in first valve chamber, and the unloading valve is only supported in one end of guide's spring
The other end of core, guide's spring only supports the valve seat, and guide's spring sets pressure initiation as the predetermined value.
6. unloading electromagnetic valve according to claim 5, which is characterized in that guide's unloading valve further includes：
Adjusting screw rod, the adjusting screw rod is located at outside guide's off-load valve pocket and the valve is only supported in one end of the adjusting screw rod
Seat, the adjusting screw rod is for adjusting the position of the valve seat to adjust the setting pressure of guide's spring.
7. unloading electromagnetic valve according to claim 6, which is characterized in that guide's unloading valve further includes：
Locking nut, the locking nut are located at the other end of the adjusting screw rod with the fixation adjusting screw rod.
8. unloading electromagnetic valve according to claim 1, which is characterized in that the two-way plug-in valve includes：
Main valve housing defines coaxial with the first passage in the main valve housing and is formed as columnar second valve chamber；
Main valve plug, the main valve plug are formed as column and are movably located at second valve chamber along the axial direction of second valve chamber
It is interior, the spring cavity for the open at one end for being formed towards the first passage is defined in the main valve plug；
Main spool spring, the main spool spring are telescopically located at along the axial direction of the spring cavity in the spring cavity, the main valve
One end of spring is connected with the main valve plug, and the other end of the main spool spring is connected with the valve body；
Valve deck, the valve deck are formed as hollow columnar, and one end of the valve deck is set in one end and the other end of the main valve housing
It is connected with the valve body.
9. unloading electromagnetic valve according to claim 1, which is characterized in that the electromagnet cut off valve includes：
Electromagnet cut off valve set defines coaxial with the third channel in electromagnet cut off valve set and is formed as columnar third
One end of valve chamber, the electromagnet cut off valve set is located in the third channel；
End spool, the shut-off valve in-core, which defines, is formed as columnar cone valve core cavity, and the cut-off spool is located at described the
In three valve chambers；
One end of poppet valve core, the poppet valve core is formed as taper and is located at the poppet valve core intracavitary；
Iron core, the iron core are located in the third valve chamber and are oppositely arranged with the poppet valve core, and one end of the iron core is formed
It is notch to be set on the other end of the poppet valve core；
Electromagnet defines column mounting hole to be set in the other end of the electromagnet cut off valve, the electricity in the electromagnet
Magnet is connected with circuit.
10. unloading electromagnetic valve according to claim 9, which is characterized in that it is described cut-off spool one end be equipped with it is described
The throttle orifice of second channel connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810653444.3A CN108518374B (en) | 2018-06-22 | 2018-06-22 | Electromagnetic unloading valve |
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| CN201810653444.3A CN108518374B (en) | 2018-06-22 | 2018-06-22 | Electromagnetic unloading valve |
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| CN108518374A true CN108518374A (en) | 2018-09-11 |
| CN108518374B CN108518374B (en) | 2020-08-14 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85109329A (en) * | 1985-12-26 | 1987-08-12 | 庄凤龄 | Pilot operated compound relief valve |
| CN201209603Y (en) * | 2008-02-01 | 2009-03-18 | 上海立新液压有限公司 | Guiding sequence valve |
| CN201288713Y (en) * | 2008-10-22 | 2009-08-12 | 上海立新液压有限公司 | Unloading relief valve |
| CN104314805A (en) * | 2014-09-22 | 2015-01-28 | 刘国利 | Mine pump automatic unloading hydraulic control valve assembly |
| CN206708390U (en) * | 2017-05-23 | 2017-12-05 | 济宁鲁威液压科技股份有限公司 | Large-flow-rate pilot formula electromagnet cut off valve |
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2018
- 2018-06-22 CN CN201810653444.3A patent/CN108518374B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85109329A (en) * | 1985-12-26 | 1987-08-12 | 庄凤龄 | Pilot operated compound relief valve |
| CN201209603Y (en) * | 2008-02-01 | 2009-03-18 | 上海立新液压有限公司 | Guiding sequence valve |
| CN201288713Y (en) * | 2008-10-22 | 2009-08-12 | 上海立新液压有限公司 | Unloading relief valve |
| CN104314805A (en) * | 2014-09-22 | 2015-01-28 | 刘国利 | Mine pump automatic unloading hydraulic control valve assembly |
| CN206708390U (en) * | 2017-05-23 | 2017-12-05 | 济宁鲁威液压科技股份有限公司 | Large-flow-rate pilot formula electromagnet cut off valve |
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| CN108518374B (en) | 2020-08-14 |
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