CN107631041B - A kind of ratio one-way flow valves of double-direction control - Google Patents
A kind of ratio one-way flow valves of double-direction control Download PDFInfo
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- CN107631041B CN107631041B CN201711088838.0A CN201711088838A CN107631041B CN 107631041 B CN107631041 B CN 107631041B CN 201711088838 A CN201711088838 A CN 201711088838A CN 107631041 B CN107631041 B CN 107631041B
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Abstract
The invention proposes a kind of ratio one-way flow valves of double-direction control, it is characterized in that, it include: proportion electro-magnet, the swivel nut that one end is connect with the proportion electro-magnet, the armature being actively installed in the swivel nut, one end is fixedly connected on the valve pocket of the other end of the swivel nut, and the other end of the valve pocket is equipped with hydraulic fluid port A and hydraulic fluid port B；The main valve plug being connected in the valve pocket which is provided with the first damping hole being connected to hydraulic fluid port B and the second damping hole being connected to hydraulic fluid port A；The guide's valve pocket being fixedly attached in the main valve plug, which is provided with pilot chamber and third damping hole；And pilot valve, one end is fixedly connected on the other end of the armature, the other end of pilot valve passes through control chamber, third damping hole and pilot chamber, and is equipped with first conical surface, cylinder convex shoulder and second conical surface at corresponding second damping hole of the other end and third damping hole of the pilot valve.The ratio one-way flow valve arrangement is simple, at low cost and can realize double-direction control.
Description
Technical field
The present invention relates to valve technology fields, and in particular to a kind of ratio one-way flow valves of double-direction control.
Background technique
In recent years, ratio one-way flow valves are gone up and down in truck-mounted crane, high-altitude operation vehicle, tractor rotary tillage plough, electri forklift etc.
Using more and more in equipment.When equipment stops, ratio one-way flow valves play the role of pressure maintaining, prevent hydraulic cylinder from gliding；
When equipment needs to decline, ratio one-way flow valves control openings of sizes according to the voltage signal size of input, adjust hydraulic cylinder
The flow of output, and then control the decrease speed of lifting device.Currently there are ratio one-way flow valves, can only realize
Unidirectional proportional flow control, that is to say, that hydraulic oil can be real when flowing into hydraulic fluid port A from the hydraulic fluid port B of ratio one-way flow valves
If existing proportional flow control, that hydraulic oil from when hydraulic fluid port A flows into hydraulic fluid port B only unidirectional valve action can not be completed proportional flow control
System.Such as the patent of invention that patent publication No. is 105298967 A of CN, entitled " a kind of big-powered tractor lifter valve group "
In provide for it is a kind of control tractor lifting mechanism hydraulic valve bank, wherein just use 2 ratio one-way flow valves, use respectively
It is adjusted in the raising and lowering speed of control lifter.It is expensive due to proportioning valve, using 2 ratio one-way flow valves gesture
The rising that must cause cost limits extensive use of the ratio one-way flow valves on the lower host of some prices.
Summary of the invention
For some or all of of the above-mentioned technical problem in the presence of the prior art, the invention proposes a kind of two-way
The ratio one-way flow valves of control, the ratio one-way flow valve arrangement is simple, at low cost and can realize double-direction control.
In order to realize the above goal of the invention, the invention proposes a kind of ratio of double-direction control having following structure is unidirectional
Flow valve, comprising:
Proportion electro-magnet,
Swivel nut, one end are connect with the proportion electro-magnet；
Armature is actively installed in the swivel nut, and one end is connected in the proportion electro-magnet by elastic component；
Valve pocket, one end are fixedly connected on the other end of the swivel nut, and the other end of the valve pocket is equipped with hydraulic fluid port A and oil
Mouth B；
Main valve plug is connected in the valve pocket, be which is provided with the first damping hole being connected to hydraulic fluid port B and is connected with hydraulic fluid port A
The second logical damping hole, the diameter of the diameter of first damping hole less than the second damping hole；
Guide's valve pocket is fixedly attached in the main valve plug, is equipped with close to one end of hydraulic fluid port A and is open towards hydraulic fluid port A
Pilot chamber and the third damping hole being connected to pilot chamber, the third damping hole can be connected to first damping hole,
The third damping bore dia is greater than the second damping bore dia；And
Pilot valve, one end are fixedly connected on the other end of the armature, the other end of pilot valve pass through control chamber,
Third damping hole and pilot chamber, and at corresponding second damping hole of the other end and third damping hole of the pilot valve from up to
Under be successively arranged first conical surface, cylinder convex shoulder and second conical surface, the diameter of the cylinder convex shoulder is equal to the diameter of third damping hole,
Second conical surface can block the second damping hole, and the cylinder convex shoulder can block third damping hole；
When the pilot valve moves up and down, the voltage swing by controlling proportion electro-magnet controls the second damping hole, the
Bidirectional throttle when unlatching, closing and the openings of sizes of three damping holes and main valve plug are to form to hydraulic fluid port A or hydraulic fluid port B oil inlet
Control.
In the present invention, it is respectively controlled unlike being provided with multiple proportional directional valves in the prior art, but by setting
The internal structure of proportional directional valve is counted, so that just can control the second damping hole, the by the voltage swing of control proportion electro-magnet
Unlatching, closing and the openings of sizes of three damping holes and main valve plug, realization can be achieved with by a proportional directional valve to hydraulic fluid port A
Or bidirectional throttle control when hydraulic fluid port B oil inlet, thus structure is simpler, cost is lower.
In one embodiment, the control chamber is by armature lower end surface, the middle part of swivel nut, the top of valve pocket, main valve
Chamber that upper end, guide's valve pocket and the pilot valve of core are formed, positioned at main valve plug upper end, the control chamber and the guide
Chamber.The relatively large control chamber of volume is formd, the multistage ratio control of progress is facilitated.
In one embodiment, when the pilot valve is mobile towards proportion electro-magnet, the third damping hole from
The fully open position of second damping hole conducting is moved to throttle position and moves again to pent position.
In one embodiment, the pilot valve connect the armature one end be T-type structure, the one of the armature
End is equipped with the first T-type hole cooperated with the T-type structure of the pilot valve, and the other end of the armature is equipped with the second T-type hole, institute
The one end for stating elastic component is mounted in the macropore in second T-type hole, and first T-type hole is connected to the second T-type hole.First T
The structure of type hole and the second T-type hole, had not only guaranteed the function-stable of elastic component, but also can guarantee that pilot valve is synchronous with armature motion
Property.
In one embodiment, when hydraulic fluid port B oil inlet, give proportion electro-magnet one voltage, the armature overcomes described
The active force of elastic component drives the pilot valve to move upwards, and second damping hole is opened, the pressure decline of control chamber,
Hydraulic fluid port B and the differential pressure action of control chamber are on main valve plug；
The pressure difference of voltage on scaling up electromagnet, hydraulic fluid port B and control chamber increases, and main valve plug is opened, the oil liquid of hydraulic fluid port B
Hydraulic fluid port A is moved to through main valve plug；
The voltage on proportion electro-magnet is further increased, the area of passage between pilot valve and the second damping hole reaches most
Greatly, main valve plug fully opens.
When hydraulic fluid port B oil inlet, realizes and controlled from hydraulic fluid port B to the throttling of the oil liquid of hydraulic fluid port A.
In one embodiment, when hydraulic fluid port A oil inlet, give proportion electro-magnet one voltage, so that pilot valve is in
Fully open the position of the second damping hole；
Continue the voltage of scaling up electromagnet, the overcurrent between first conical surface and third damping hole of the pilot valve
Area reduces, and main valve plug is gradually opened at hydraulic fluid port A and the differential pressure action of control chamber；
The voltage of proportion electro-magnet is further increased, the cylinder convex shoulder of the pilot valve blocks third damping hole, main
Spool reaches maximum opening.
It is understood that, if not giving proportion electro-magnet voltage, being equivalent to common check valve when hydraulic fluid port A oil inlet.For
It realizes and is controlled from hydraulic fluid port A to the ratio of hydraulic fluid port B, then start to need first to give one sufficient voltage of proportion electro-magnet and make elder generation
Guide valve core will cover the position of third damping hole in fully opening the second damping hole, then again from hydraulic fluid port A oil inlet.
In a preferred embodiment, the valve pocket is connect with the other end thread seal of the swivel nut, the master
The lower end of spool and the junction of the valve pocket are equipped with inclined-plane.In order to realize that better seal connects, the structure on inclined-plane is in main valve
Core achievable pressure maintaining before opening.
Compared with prior art, the invention has the following advantages that
1) present invention can be realized double from hydraulic fluid port A to hydraulic fluid port B and from hydraulic fluid port B to hydraulic fluid port A by a proportional directional valve
To control；Multiple proportioning valves are used in compared with the prior art, not only greatly reduce cost, but also reduce the multiple valves of installation
Difficulty, area occupied are small；
2) present invention is compared to for existing bidirectional control valve, and components are less, structure is simpler, using more reliable；Also it drops
Low manufacturing process difficulty and manufacturing cost.
Detailed description of the invention
The preferred embodiment of the present invention is described in detail below in conjunction with attached drawing, in figure:
Fig. 1 show the structural representation of one of embodiment of the ratio one-way flow valves of double-direction control of the invention
Figure；
Fig. 2 show one of position view of the embodiment in Fig. 1 in hydraulic fluid port B oil inlet；
Fig. 3 show the latter position view of Fig. 2；
Fig. 4 show one of position view of the embodiment in Fig. 1 in hydraulic fluid port A oil inlet；
Fig. 5 show the latter position view of Fig. 4；
Fig. 6 show the structural schematic diagram of the hydraulic system of the ratio one-way flow valves using double-direction control of the invention.
In attached drawing, identical component uses identical appended drawing reference.The attached drawing is not drawn according to the actual ratio.
Specific embodiment
In order to which technical solution of the present invention and advantage is more clearly understood, below in conjunction with attached drawing to of the invention exemplary
Embodiment is described in more detail.Obviously, the described embodiments are merely a part of the embodiments of the present invention, rather than
The exhaustion of all embodiments.And in the absence of conflict, the feature in the embodiment and embodiment in the present invention can be mutual
It combines.
Inventor is during invention it is noted that existing ratio one-way flow valves can only realize unidirectional proportional flow
Control, limits the application range of ratio one-way flow valves.
Against the above deficiency, the embodiment of the present invention proposes a kind of ratio one-way flow valves of double-direction control, below into
Row explanation.
Fig. 1 shows one of embodiment of the ratio one-way flow valves of double-direction control of the invention.In the embodiment
In, the ratio one-way flow valves of double-direction control of the invention specifically include that proportion electro-magnet 1, swivel nut 2, armature 7, main valve plug 4,
Guide's valve pocket 5 and pilot valve 6.Wherein, one end of swivel nut 2 is fixedly connected with proportion electro-magnet 1, and the other end of swivel nut 2 passes through
It is threadedly coupled valve pocket 3, valve pocket 3 is equipped with hydraulic fluid port A and hydraulic fluid port B far from one end of swivel nut 2.Main valve plug 4 is connected in valve pocket 3,
It is equipped with the first damping hole 8 being connected to hydraulic fluid port B and the second damping hole 9 being connected to hydraulic fluid port A, guide's valve pocket 5 is fixedly attached to
In the main chamber of main valve plug 6, the third damping hole 51 for being equipped with pilot chamber in guide's valve pocket 5 and being connected to pilot chamber, the
The diameter of three damping holes 51 is greater than the diameter of the second damping hole 9.One end of pilot valve 6 is fixedly connected on armature 7, pilot valve
The other end of core 6 passes through control chamber 10, third damping hole 51 and pilot chamber.
When the pilot valve moves up and down, the voltage swing by controlling proportion electro-magnet controls the second damping hole, the
Bidirectional throttle when unlatching, closing and the openings of sizes of three damping holes and main valve plug are to form to hydraulic fluid port A or hydraulic fluid port B oil inlet
Control.
In one embodiment, it is successively set from top to bottom at corresponding second damping hole 9 of pilot valve 6 and third damping hole 51
There are first conical surface 61, cylinder convex shoulder 62 and second conical surface 63, it is therefore appreciated that, as shown in Figure 1, pilot valve 6 is not
When rising, second conical surface is pressed against on the second damping hole 9, and the second damping hole 9 is in close state at this time, and pilot valve 6 is upward
When mobile, cylinder convex shoulder 62 can block third damping hole 51.
In one embodiment, as shown in Figures 1 to 5, control chamber 10 is by the lower end surface of armature 7, the middle part of swivel nut 2, valve
The top of set 3, the upper end of main valve plug 4, guide's valve pocket 5 and pilot valve 6 upper end formed, it is positioned at 4 upper end of main valve plug
Chamber.Herein, the relatively large control chamber 10 of a volume is formd to facilitate and carry out multistage ratio control.It is understood that
Be, control chamber 10 shown in embodiment be it is one such, the volume that can actually change control chamber in several ways is big
Small and shape, such as change the shape of 3 upper end of valve pocket to change the shapes and sizes etc. of control chamber.
In one embodiment, diameter of the diameter of the first damping hole 8 less than the second damping hole 9.Pilot valve 6 towards than
When example 1 direction of electromagnet (Fig. 3 is shown upwards) is moved, third damping hole 51 is from the fully open position be connected with the second damping hole 9
It is moved to and throttle position is formed by by first conical surface 61 moves again to the position closed by cylinder convex shoulder 62.
In a preferred embodiment, it is T-type structure, one end (figure of armature 7 that pilot valve 6, which connects one end of armature 7,
It is upper end in 1) it is equipped with the first T-type hole cooperated with the T-type structure of pilot valve 6, the other end (being lower end in Fig. 1) of armature 7
Equipped with the second T-type hole, one end of elastic component 11 is mounted in the macropore in the second T-type hole, and the first T-type hole is connected to the second T-type hole.
In one embodiment, when hydraulic fluid port B oil inlet, give proportion electro-magnet 1 one voltages, armature 7 overcomes elastic component 11
Active force, drive pilot valve 6 to move upwards, the second damping hole 9 is opened, the decline of the pressure of control chamber 10, hydraulic fluid port B and control
The differential pressure action of chamber 10 is on main valve plug 4.The pressure difference of voltage on scaling up electromagnet 1, hydraulic fluid port B and control chamber 10 increases,
Main valve plug 4 is opened, and the oil liquid of hydraulic fluid port B is moved to hydraulic fluid port A through main valve plug 4.The voltage on proportion electro-magnet 1 is further increased, first
Area of passage between guide valve core 6 and the second damping hole 9 reaches maximum, and main valve plug 4 fully opens.
In one embodiment, when hydraulic fluid port A oil inlet, first give proportion electro-magnet 1 one voltages, so that, so that pilot valve
Core 6 is in the position (as shown in Figure 4) for fully opening the 2nd 9 damping hole.Continue the voltage of scaling up electromagnet, pilot valve
First conical surface 61 and third damping hole 51 between area of passage reduce, differential pressure action of the main valve plug 4 in hydraulic fluid port A and control chamber
Under gradually open.The voltage of proportion electro-magnet is further increased, the cylinder convex shoulder of pilot valve 6 blocks third damping hole 51,
Main valve plug 4 reaches maximum opening.
In an embodiment of the present invention, when pilot valve 6 moves up, by the voltage swing for controlling proportion electro-magnet 1
Unlatching, closing and the openings of sizes of controllable second damping hole 9, third damping hole 51 and main valve plug 4, to be formed to hydraulic fluid port
A or bidirectional throttle control when hydraulic fluid port B oil inlet.The specific course of work is introduced in detail below.
If hydraulic fluid port B oil inlet, when proportion electro-magnet 1 is given certain voltage, proportion electro-magnet 1 generates certain suction
Power, armature 7 overcome the effect of spring 11 to generate certain displacement under the action of the suction, and pilot valve 6 is driven to be separated from the
Two damping holes 9, the pressure of control chamber 10 will decline at this time, the pressure initiation pressure difference in the pressure and control chamber 10 of hydraulic fluid port B, this pressure
Difference acts on main valve plug 4 and (since main valve plug 4 is also stairstepping, generates difference in areas), but resultant force is also not enough to push at this time
Main valve plug 4 is pushed to rise.
Continue to increase the voltage on proportion electro-magnet 10, the second damping hole 9 is further opened, hydraulic fluid port B pressure and control
Pressure difference in chamber 10 increases, and main valve plug 4 is begun to move up, and the oil liquid of hydraulic fluid port B flows to hydraulic fluid port A (as shown in Figure 3).
The voltage for continuing to increase given proportion electro-magnet 1, the overcurrent between the second damping hole 9 and pilot valve 6
Area reaches maximum, and main valve plug 4 fully opens at this time.
If hydraulic fluid port A oil inlet, needs first to give the enough initial voltages of proportion electro-magnet 1, be in pilot valve 6 and beat completely
Open the initial control position (as shown in Figure 4) of the second damping hole 9.On the basis of initial voltage, it is gradually increased voltage signal, is led to
First conical surface 61 of pilot valve 6 is crossed, third damping hole 51 is gradually gradually reduced area of passage.Namely third damping hole 51 exists
Gradually (as shown in Figure 5) is closed under the action of first conical surface 61 and cylinder convex shoulder 62 of pilot valve 6.Main valve plug 4 is closing in this way
It under the action of power, gradually opens, the flow of hydraulic fluid port A to hydraulic fluid port B become larger.
According to the above, when hydraulic fluid port A oil inlet, gives proportion electro-magnet 1 maximum voltage, and main valve plug 4 can reach maximum and hold
Degree, hydraulic fluid port A to hydraulic fluid port B is flowed up to maximum flow rate at this time.If not giving 1 voltage of proportion electro-magnet, pilot valve 6 is in and seals
The position (as shown in Figure 1) of second damping hole 9, hydraulic fluid port A to hydraulic fluid port B flowing are equivalent to check valve, can also reach maximum flow rate.Cause
This, maximum speed control can give 1 maximum voltage of proportion electro-magnet by hydraulic fluid port A oil inlet and not to the check valve function of voltage
Can both modes realize.
The effect of the ratio one-way flow valves of double-direction control in order to better illustrate the present invention, as Fig. 6 shows one
Using the schematic illustration of the hydraulic system of the ratio one-way flow valves 15 of double-direction control of the invention.In the figure, hydraulic pump
13 oil liquid come out pass through the solenoid directional control valve 14 of two-bit triplet, if the solenoid directional control valve 14 of two-bit triplet must be electric, after commutation
Into the ratio one-way flow valves 15 of double-direction control of the invention, when giving the initial pressure of 1 abundance of proportion electro-magnet,
Oil liquid controllably flows to hydraulic fluid port B through hydraulic fluid port A, then enters hydraulic cylinder 16 by the road.
If the solenoid directional control valve 14 of two-bit triplet as shown in Figure 6 must not be electric, then the oil liquid of hydraulic cylinder 16 is through hydraulic fluid port
B, in the case where giving 1 corresponding pressure of proportion electro-magnet, oil liquid flows to hydraulic fluid port A from hydraulic fluid port B in such a way that ratio controls, then
Fuel tank is returned to through solenoid directional control valve 14.In the case of this kind, if desired midway stops decline, the ratio list of double-direction control of the invention
It can play the role of pressure maintaining to flow valve 15.
In the present invention, it is respectively controlled unlike being provided with multiple proportional directional valves in the prior art, but by setting
Count proportional directional valve internal structure so that by control proportion electro-magnet 1 voltage swing just can control the second damping hole 9,
Unlatching, closing and the openings of sizes of third damping hole 51 and main valve plug 4, realizing can be achieved with pair by a proportional directional valve
Hydraulic fluid port A or bidirectional throttle control when hydraulic fluid port B oil inlet, thus structure is simpler, cost is lower.
In addition, explanation, core of the invention technology are: second conical surface 63 and the second damping hole 9 of pilot valve 6
The first variable restrictor is formed, first conical surface 61 and the third damping hole 51 of pilot valve 6 form the second variable restrictor.Hydraulic oil from
When hydraulic fluid port B flows into hydraulic fluid port A, the area of the first variable restrictor of control is greater than the area of the first damping hole, and main valve plug 4 will be opened slowly
It opens, the area of the first variable restrictor is bigger, and main valve plug 4 is opened bigger.When hydraulic oil flows into hydraulic fluid port B from hydraulic fluid port A, control second
Less than the area of the first damping hole, main valve plug 4 will open slowly the area of variable restrictor, and the area of the second variable restrictor is got over
Small, the unlatching of main valve plug 4 is bigger.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.Therefore, it includes excellent that the following claims are intended to be interpreted as
Select embodiment and fall into having altered and/or modifying for the scope of the invention, the change that embodiment according to the present invention is made and/
Or modification should be covered by the protection scope of the present invention.
Claims (7)
1. a kind of ratio one-way flow valves of double-direction control characterized by comprising
Proportion electro-magnet,
Swivel nut, one end are connect with the proportion electro-magnet；
Armature is actively installed in the swivel nut, and one end is connected in the proportion electro-magnet by elastic component；
Valve pocket, one end are fixedly connected on the other end of the swivel nut, and the other end of the valve pocket is equipped with hydraulic fluid port A and hydraulic fluid port B；
Main valve plug is connected in the valve pocket, be which is provided with the first damping hole being connected to hydraulic fluid port B and is connected to hydraulic fluid port A
Second damping hole, the diameter of the diameter of first damping hole less than the second damping hole；
Guide's valve pocket is fixedly attached in the main valve plug, and the guide being open towards hydraulic fluid port A is equipped with close to one end of hydraulic fluid port A
Chamber and the third damping hole being connected to pilot chamber, the third damping hole can be connected to first damping hole, described
Third damps bore dia and is greater than the second damping bore dia；And
Pilot valve, one end are fixedly connected on the other end of the armature, and the other end of pilot valve passes through control chamber, third
Damping hole and pilot chamber, and at corresponding second damping hole of the other end and third damping hole of the pilot valve from top to bottom according to
Secondary to be equipped with first conical surface, cylinder convex shoulder and second conical surface, the diameter of the cylinder convex shoulder is equal to the diameter of third damping hole, described
Second conical surface can block the second damping hole, and the cylinder convex shoulder can block third damping hole when moving up；
When the pilot valve moves up and down, the voltage swing by controlling proportion electro-magnet controls the second damping hole, third hinders
Bidirectional throttle control when unlatching, closing and the openings of sizes of Buddhist nun hole and main valve plug are to form to hydraulic fluid port A or hydraulic fluid port B oil inlet
System.
2. ratio one-way flow valves according to claim 1, which is characterized in that the control chamber be by armature lower end surface,
It is that the middle part of swivel nut, the top of valve pocket, the upper end of main valve plug, guide's valve pocket and pilot valve are formed, be located at main valve plug upper end
Chamber, the control chamber is connected to the pilot chamber.
3. ratio one-way flow valves according to any one of claim 1 to 2, which is characterized in that the pilot valve court
When mobile to proportion electro-magnet, the third damping hole is moved to throttle position again from the fully open position be connected with the second damping hole
It is moved to pent position.
4. ratio one-way flow valves according to claim 1, which is characterized in that the pilot valve connects the armature
One end is T-type structure, and one end of the armature is equipped with the first T-type hole cooperated with the T-type structure of the pilot valve, the rank
The other end of iron is equipped with the second T-type hole, and one end of the elastic component is mounted in the macropore in second T-type hole, the first T
Type hole is connected to the second T-type hole.
5. ratio one-way flow valves according to claim 1, which is characterized in that when hydraulic fluid port B oil inlet, give proportion electro-magnet
One voltage, the armature overcome the active force of the elastic component, and the pilot valve is driven to move upwards, second damping
Hole is opened, the pressure decline of control chamber, and the differential pressure action of hydraulic fluid port B and control chamber is on main valve plug；
The pressure difference of voltage on scaling up electromagnet, hydraulic fluid port B and control chamber increases, and main valve plug is opened, and the oil liquid of hydraulic fluid port B is through master
Spool is moved to hydraulic fluid port A；
The voltage on proportion electro-magnet is further increased, the area of passage between pilot valve and the second damping hole reaches maximum,
Main valve plug fully opens.
6. ratio one-way flow valves according to claim 1, which is characterized in that when hydraulic fluid port A oil inlet, give proportion electro-magnet
One voltage, so that pilot valve is in the position for fully opening the second damping hole；
Continue the voltage of scaling up electromagnet, the area of passage between first conical surface and third damping hole of the pilot valve
Reduce, main valve plug is gradually opened at hydraulic fluid port A and the differential pressure action of control chamber；
The voltage of proportion electro-magnet is further increased, the cylinder convex shoulder of the pilot valve blocks third damping hole, main valve plug
Reach maximum opening.
7. ratio one-way flow valves according to claim 1, which is characterized in that the other end of the valve pocket and the swivel nut
The junction of thread seal connection, the lower end of the main valve plug and the valve pocket is equipped with inclined-plane.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711088838.0A CN107631041B (en) | 2017-11-08 | 2017-11-08 | A kind of ratio one-way flow valves of double-direction control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711088838.0A CN107631041B (en) | 2017-11-08 | 2017-11-08 | A kind of ratio one-way flow valves of double-direction control |
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| CN107631041A CN107631041A (en) | 2018-01-26 |
| CN107631041B true CN107631041B (en) | 2019-05-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111306333B (en) * | 2020-03-01 | 2023-05-16 | 浙江人一阀门制造有限公司 | Safety valve |
| CN114458769A (en) * | 2020-11-09 | 2022-05-10 | 英嘉动力科技无锡有限公司 | Quick response's guide's formula solenoid valve structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US10508964B2 (en) * | 2013-03-14 | 2019-12-17 | Eaton Intelligent Power Limited | Solenoid valve assembly with pilot pressure control |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87202245U (en) * | 1987-02-16 | 1987-12-31 | 长沙工程机械液压件厂 | Pluggable balance valve |
| JP2004286159A (en) * | 2003-03-24 | 2004-10-14 | Finesinter Co Ltd | Pilot type solenoid valve |
| CN205036664U (en) * | 2015-09-30 | 2016-02-17 | 浙江华益精密机械股份有限公司 | Unloading valve |
| CN205371160U (en) * | 2015-12-28 | 2016-07-06 | 赛克思液压科技股份有限公司 | Pressure boost overflow valve |
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| CN107631041A (en) | 2018-01-26 |
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