CN107701763B - The ratio one-way flow valves of performance improvement - Google Patents
The ratio one-way flow valves of performance improvement Download PDFInfo
- Publication number
- CN107701763B CN107701763B CN201711104158.3A CN201711104158A CN107701763B CN 107701763 B CN107701763 B CN 107701763B CN 201711104158 A CN201711104158 A CN 201711104158A CN 107701763 B CN107701763 B CN 107701763B
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- valve
- hydraulic fluid
- fluid port
- damping hole
- throttling
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The present invention relates to a kind of ratio one-way flow valves of performance improvement, it is characterised in that: including valve body, valve pocket, valve pocket is equipped with the first hydraulic fluid port, the second hydraulic fluid port and valve port；Main valve plug is equipped in valve pocket, the periphery conical surface and valve port of main valve plug cooperate, and have control chamber and installation cavity in main valve plug, the first damping hole is provided on the side wall of main valve plug, the inside of main valve plug is equipped with the second damping hole, the aperture of the aperture of the first damping hole less than the second damping hole；Pilot valve is equipped in control chamber, pilot valve can be moved up and down by proportion electro-magnet structure control, and the lower end of pilot valve and the second damping hole cooperate；Bushing and valve seat are installed in installation cavity, there is throttle orifice in bushing, throttling valve core is equipped in valve seat, is supported with the first spring below throttling valve core, when throttling valve core overcomes the effect of the first spring to move downward, the gap between throttling valve core upper end and throttle orifice is smaller and smaller.It is the ratio one-way flow valves for meeting the performance improvement that low-load uses that a kind of structure is more reasonable, at low cost.
Description
Technical field
The invention belongs to the technical field of hydraulic valve more particularly to a kind of ratio one-way flow valves of performance improvement.
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, have it is following lack
Point:
1. the flow control of ratio one-way flow valves is to drive pilot valve by proportion electro-magnet, guide's oil return section is adjusted
Flow area, and then change the size of main valve plug control cavity pressure, effect of the main valve plug in load pressure and control cavity pressure pressure difference
Under follow pilot valve to open.Because the variation of load causes the range of main valve plug load cavity pressure change can in reality is practical
It can be 0.3~25MPa, such as load pressure may be 25MPA when electri forklift full-load run, and when empty, load pressure
Power is lower than 1MPa.Main valve plug is opened excessive when loading too big in order to prevent, the throttling of the throttle orifice of general pilot valve control
Area is smaller, in this way when load pressure is 1~25MPa, needs on main valve plug because the power that pressure difference generates can be such that main valve plug reaches
Aperture is wanted, when load pressure is lower than 1MPa, area of passage, the pressure and load pressure of main valve plug control chamber are adjusted by pilot valve
The difference very little of power results in spool aperture very little in this way and does not open even, the flow of demand is not achieved, influences ratio one-way flow
The application of valve.
In conclusion existing ratio one-way flow valves can be further improved.
Summary of the invention
The technical problem to be solved by the present invention is to for above-mentioned state of the art and provide a kind of structure it is more reasonable,
Ratio one-way flow valves that are at low cost, being able to satisfy the performance improvement that low-load uses.
The technical scheme of the invention to solve the technical problem is: a kind of ratio one-way flow of performance improvement
Valve, including valve body, the lower thread of valve body are connected with the valve pocket with the stepped hole axially penetrated through, and the lower ending opening of valve pocket is formed
First hydraulic fluid port is provided with the second hydraulic fluid port being connected to stepped hole on the side wall of valve pocket, and the input end of the small hole portion of stepped hole, which is formed, to be connected
Lead to the valve port of first hydraulic fluid port and the second hydraulic fluid port；Be equipped with stepped main valve plug in valve pocket, the periphery conical surface of main valve plug with
Valve port cooperation, so that moving up and down for main valve plug can open and close valve port, control chamber formed at the top in the main valve plug, in main valve plug
Lower part form the installation cavity that communicates with the first hydraulic fluid port, be provided on the side wall of main valve plug and be connected to the first of the second hydraulic fluid port and control chamber
Damping hole, the inside of main valve plug are equipped with the second damping hole to be connected to control chamber and installation cavity, and the aperture of the first damping hole
Less than the aperture of the second damping hole；The pilot valve that can be moved up and down is equipped in the control chamber, pilot valve is by being mounted on valve
The proportion electro-magnet structure control of body upper end and can move up and down, the lower end of pilot valve and the second damping hole cooperate, so that first
Guide valve core moves up and down the opening degree that can control the second damping hole, it is characterised in that: is equipped with bushing in the installation cavity
And valve seat, valve seat are located at below bushing, the lower end aperture of valve seat have to be communicated with the first hydraulic fluid port, in bushing axially penetrate through and on
Small throttle orifice under big, valve seat is interior to be equipped with throttling valve core, and the upper end of throttling valve core is protruded into throttle orifice, and the lower end of throttling valve core is opened
There is the oil-through-hole of connection the first hydraulic fluid port and throttle orifice, is supported with the first spring below throttling valve core, which makes to throttle
Spool is maintained at the overcurrent gap state for keeping certain between throttle orifice, when throttling valve core overcomes the first acting force of the spring downward
When movement, throttling valve core was formed by ebb interval with throttle orifice and was gradually reduced.
In one embodiment, the upper end of the throttling valve core and throttle orifice mating part from top to bottom include the first circle
Column and the second cylinder, the diameter that the diameter of the first cylinder is greater than the second cylinder are relatively large in diameter when such throttling valve core moves downward
The first cylinder it is more and more closer with throttle orifice lower end, with reduce between the two cross ebb interval.
In one embodiment, aforementioned proportion electromagnet structure includes determining iron part, armature part, second spring and line
Enclose part, it is described determine iron part and plug and be weldingly fixed on the intracorporal upper end of valve, armature part be set to valve body it is interior and can on move down
Dynamic, the upper end of the pilot valve is connected to the lower end of armature part and can move up and down with armature part, the second spring
It is supported on and determines between iron part and armature part, the coiler part is set in and constrains in valve body top with can be to determining iron part
Form induction.The above are a kind of specific structures of proportion electro-magnet structure, and existing other structures also can be used certainly.
Preferably, the lower end of above-mentioned armature part is equipped with T-slot, the upper end of the pilot valve is equipped with T shape connecting column,
The T shape connecting column, which is embedded in the T-slot, forms connection.The connection type is convenient for assembling between the two.
Preferably, the surface cooperated between the lower end of above-mentioned pilot valve and the second damping hole is the conical surface.
Compared with the prior art, the advantages of the present invention are as follows: this ratio one-way flow valves can meet low-load and use.When
Two hydraulic fluid port oil inlets, when proportion electro-magnet structure being made to give certain voltage, proportion electro-magnet structure generates certain suction, armature
Part overcomes the power of second spring to generate certain upward displacement, drives pilot valve to be separated from the second damping hole, controls at this time
Intracavitary pressure will decline, and the pressure in the pressure and control chamber of the second hydraulic fluid port has pressure difference, this differential pressure action is (main on main valve plug
Spool is stepped shape, generates difference in areas), but resultant force is also not enough to that main valve plug is pushed to move up at this time；Continue increasing ratio electromagnetism
Voltage on iron construction, the pressure difference in the pressure and control chamber of the second hydraulic fluid port increase, and main valve plug is begun to move up, the second hydraulic fluid port
Oil liquid flow to the first hydraulic fluid port.Continue to increase to the voltage of proportion electro-magnet structure, between the second damping hole and pilot valve
Area of passage reaches maximum, and main valve plug fully opens at this time.If the pressure of the second hydraulic fluid port is bigger, the oil liquid in control chamber passes through
It after second damping hole, pushes throttling valve core that the compressing force of the first spring is overcome to move downward, makes throttling valve core upper end and bushing
Area of passage between throttle orifice reduces, and the pressure reduction in control chamber will not be made excessive in this way, so that main valve plug be made to be open
Greatly；And when the pressure of the second hydraulic fluid port is relatively low, when oil liquid is not enough to overcome after the second damping hole the compressing force of the first spring, section
Ebb interval is maximum, and area of passage is maximum for crossing between flow valve core and bushing throttle orifice, thus control chamber pressure it is available compared with
Big release, the pressure of the second hydraulic fluid port and the available guarantee of the pressure difference of control chamber, make main valve plug the second hydraulic fluid port pressure compared with
Also it can reach larger open when low.
Detailed description of the invention
Fig. 1 is the cross-sectional view of the embodiment of the present invention；
Fig. 2 is the partial sectional view of the embodiment of the present invention；
Fig. 3 is the enlarged view at I of Fig. 2；
Fig. 4 is function schematic diagram of the invention.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
It as shown in Figures 1 to 3, is a preferred embodiment of the present invention.
A kind of ratio one-way flow valves of performance improvement, including valve body 1, the lower thread of valve body 1, which is connected with, to be had axially
The valve pocket of perforative stepped hole 21, the lower ending opening of valve pocket 2 form the first hydraulic fluid port A, are provided on the side wall of valve pocket 2 and connect with stepped hole
The second logical hydraulic fluid port B, the input end of the small hole portion of stepped hole 21 form the valve port 22 of connection the first hydraulic fluid port A and the second hydraulic fluid port B.
Stepped main valve plug 3 is equipped in valve pocket 2, the periphery conical surface and valve port 22 of main valve plug 3 cooperate, so that main valve plug
3 move up and down can open and close valve port 22, and control chamber 31 is formed at the top in main valve plug 3, and the lower part in main valve plug 3 is formed and first
The installation cavity 32 that hydraulic fluid port A is communicated is provided with the first damping hole 4a of connection the second hydraulic fluid port B and control chamber 31 on the side wall of main valve plug 3,
The inside of main valve plug 3 is equipped with the second damping hole 4b to be connected to control chamber 31 Yu installation cavity 32, and the hole of the first damping hole 4a
Aperture of the diameter less than the second damping hole 4b.
It is equipped with the pilot valve 5 that can be moved up and down in control chamber 31, pilot valve 5 is by being mounted on the ratio of 1 upper end of valve body
Electromagnet structure 6 is controlled and can be moved up and down, and the lower end of pilot valve 5 and the second damping hole 4b cooperate, so that pilot valve 5
The opening degree that can control the second damping hole 4b is moved up and down, is cooperated between the lower end of pilot valve 5 and the second damping hole 4b
Surface is the conical surface, and the lower end of pilot valve 5 can be pierced by downwards the second damping hole 4b.
Proportion electro-magnet structure 6 includes determining iron part 61, armature part 62, second spring 63 and coiler part 64, described
Determine the upper end that iron part 61 plugs and is weldingly fixed in valve body 1, armature part 62 is set in valve body 1 and can move up and down, first
The upper end of guide valve core 5 is connected to the lower end of armature part 62 and can move up and down with armature part 62, and second spring 63 is supported on
Determine between iron part 61 and armature part 62, the coiler part 64 is set in and constrains in 1 top of valve body with can be to determining iron portion
61 are divided to form induction.The lower end of armature part 62 is equipped with T-slot 621, and 5 upper ends of the pilot valve are equipped with T shape connecting column 51,
The T shape connecting column 51 is embedded in the T-slot 621 and forms connection.
Bushing 7 and valve seat 8 be installed, valve seat 8 is located at 7 lower section of bushing, and the lower end aperture of valve seat 8 is with the in installation cavity 32
One hydraulic fluid port A is communicated, and is had in bushing 7 and is axially penetrated through and up big and down small throttle orifice 71, is equipped with throttling valve core 9, throttling in valve seat 8
The upper end of spool 9 is protruded into throttle orifice 71, and the lower end of throttling valve core 9 is provided with the oil-through-hole of the first hydraulic fluid port A and throttle orifice 71 of connection
93, the lower section of throttling valve core 9 is supported with the first spring 10, first spring 10 make throttling valve core 9 be maintained at throttle orifice 71 it
Between keep certain overcurrent gap state, when throttling valve core 9 overcomes 10 active force of the first spring to move downward, throttling valve core 9
Ebb interval was formed by with throttle orifice 71 to be gradually reduced.The upper end of throttling valve core 9 includes the first cylinder 91 and the second cylinder 92,
The diameter of first cylinder 91 is greater than the diameter of the second cylinder 92, and in this way when throttling valve core 9 moves downward, the first cylinder 91 can be with
71 lower end of throttle orifice gradually approaches and protrudes into the lower end of throttle orifice 71, keeps throttle clearance between the two smaller and smaller.
The operation principle and process of this flow valve is as follows
If the second hydraulic fluid port B oil inlet, when proportion electro-magnet structure 6 gives certain voltage, proportion electro-magnet structure 6 is generated
Certain suction, armature part 62 overcome the power of second spring 63 to generate certain upward displacement, pilot valve 5 are driven to be separated from
Second damping hole 4b, the pressure in control chamber 31 will decline at this time, and the pressure in the pressure and control chamber 31 of the second hydraulic fluid port B has pressure
Difference, this differential pressure action (main valve plug 3 is stepped shape, generates difference in areas) on main valve plug 3, but resultant force is also not enough to push at this time
Main valve plug 3 moves up；Continue to increase the voltage in proportion electro-magnet structure, the pressure difference in the pressure and control chamber 31 of the second hydraulic fluid port B
Increase, main valve plug 3 is begun to move up, and the oil liquid of the second hydraulic fluid port B flows to the first hydraulic fluid port A.To the voltage of proportion electro-magnet structure 6
Continue to increase, the area of passage between the second damping hole 4b and pilot valve 5 reaches maximum, and main valve plug 3 fully opens at this time.If
The pressure of second hydraulic fluid port B is bigger, and the oil liquid in control chamber 31 pushes throttling valve core 9 to overcome the after the second damping hole 4b
The compressing force of one spring 10 moves downward, and reduces the area of passage between throttling valve core 9 and the throttle orifice 71 of bushing 7, in this way
The pressure reduction in control chamber 31 will not be made excessive, cause main valve plug 3 is made to be open excessive；And when the pressure of the second hydraulic fluid port B compares
It is low, when oil liquid is not enough to overcome after the second damping hole 4b the compressing force of the first spring 10, between throttling valve core 9 and bushing 7
Ebb interval maximum is crossed, area of passage is maximum, therefore the available biggish release of pressure of control chamber 31, the pressure of the second hydraulic fluid port B
The available guarantee of the pressure difference of power and control chamber 31, make main valve plug 3 can also reach when the pressure of the second hydraulic fluid port B is lower compared with
Big opening.
Although the preferred embodiment of the present invention has been described in detail above, it is to be clearly understood that for this field
Technical staff for, the invention may be variously modified and varied.Done within the spirit and principles of the present invention
What modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of ratio one-way flow valves of performance improvement, including valve body (1), the lower thread of valve body (1) are connected with axis
To the valve pocket of perforative stepped hole (21), the lower ending opening of valve pocket (2) forms the first hydraulic fluid port (A), is provided on the side wall of valve pocket (2)
The second hydraulic fluid port (B) being connected to stepped hole, the input end of the small hole portion of stepped hole (21) formed be connected to first hydraulic fluid port (A) and
The valve port (22) of second hydraulic fluid port (B)；Be equipped with stepped main valve plug (3) in valve pocket (2), the periphery conical surface of main valve plug (3) with
Valve port (22) cooperation, so that moving up and down for main valve plug (3) can open and close valve port (22), control is formed at the top in main valve plug (3)
Chamber (31), the lower part in main valve plug (3) form the installation cavity (32) communicated with the first hydraulic fluid port (A), open on the side wall of main valve plug (3)
There is the first damping hole (4a) of connection the second hydraulic fluid port (B) and control chamber (31), the inside of main valve plug (3) is equipped with to be connected to control
The second damping hole (4b) of chamber (31) and installation cavity (32), and the aperture of the first damping hole (4a) is less than the second damping hole (4b)
Aperture；The pilot valve (5) that can be moved up and down is equipped in the control chamber (31), pilot valve (5) is by being mounted on valve body (1)
The proportion electro-magnet structure (6) at end is controlled and can be moved up and down, and the lower end of pilot valve (5) and the second damping hole (4b) cooperate,
So that pilot valve (5) moves up and down the opening degree that can control the second damping hole (4b), it is characterised in that: the installation cavity
(32) bushing (7) and valve seat (8) be installed in, valve seat (8) is located at bushing (7) lower section, and the lower end aperture of valve seat (8) is with first
Hydraulic fluid port (A) communicates, and has in bushing (7) and axially penetrates through and up big and down small throttle orifice (71), is equipped with throttling in the valve seat (8)
Spool (9), the upper end of throttling valve core (9) are protruded into throttle orifice (71), and the lower end of throttling valve core (9) is provided with the first hydraulic fluid port of connection
(A) and the oil-through-hole (93) of throttle orifice (71) the first spring (10), are supported with below throttling valve core (91), first spring
(10) it is maintained at throttling valve core (9) between throttle orifice (71) and keeps certain overcurrent gap state, when throttling valve core (9) gram
When taking the first spring (10) active force and moving downward, throttling valve core (9) was formed by ebb interval with throttle orifice (71) and gradually subtracted
It is small.
2. the ratio one-way flow valves of performance improvement according to claim 1, it is characterised in that: the throttling valve core (9)
Upper end and throttle orifice (71) mating part from top to bottom include the first cylinder (91) and the second cylinder (92), first cylinder
(91) diameter is greater than the diameter of the second cylinder (92).
3. the ratio one-way flow valves of performance improvement according to claim 1, it is characterised in that: the proportion electro-magnet knot
Structure (6) includes determining iron part (61), armature part (62), second spring (63) and coiler part (64), described to determine iron part
(61) upper end for plugging and being weldingly fixed in valve body (1), armature part (62) are set in valve body (1) and can move up and down, institute
The upper end for stating pilot valve (5) is connected to the lower end of armature part (62) and can move up and down with armature part (62), and described
Two springs (63), which are supported on, to be determined between iron part (61) and armature part (62), and the coiler part (64) is set in and constrains in
Valve body (1) top is can form induction to iron part (61) are determined.
4. the ratio one-way flow valves of performance improvement according to claim 3, it is characterised in that: the armature part (62)
Lower end be equipped with T-slot (621), (5) upper end of the pilot valve is equipped with T shape connecting column (51), the T shape connecting column (51)
It is embedded in the T-slot (621) and forms connection.
5. the ratio one-way flow valves of performance improvement according to claim 4, it is characterised in that: the pilot valve (5)
Lower end and the second damping hole (4b) between the surface that cooperates be the conical surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711104158.3A CN107701763B (en) | 2017-11-10 | 2017-11-10 | The ratio one-way flow valves of performance improvement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711104158.3A CN107701763B (en) | 2017-11-10 | 2017-11-10 | The ratio one-way flow valves of performance improvement |
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| CN107701763A CN107701763A (en) | 2018-02-16 |
| CN107701763B true CN107701763B (en) | 2019-03-19 |
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| CN201711104158.3A Active CN107701763B (en) | 2017-11-10 | 2017-11-10 | The ratio one-way flow valves of performance improvement |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108223477A (en) * | 2018-03-15 | 2018-06-29 | 佛山市荞帆机电科技有限公司 | A kind of inserted valve for improveing speed regulating structure and driving detent mechanism |
| CN109139591B (en) * | 2018-09-25 | 2020-03-10 | 中国农业大学 | Mountain and hill self-adaptation pilot-operated type electro-hydraulic proportional threaded cartridge valve |
| CN109973456A (en) * | 2019-04-16 | 2019-07-05 | 武汉科技大学 | A kind of automatically controlled high pressure check valve of combined type |
| CN112901584B (en) * | 2021-03-10 | 2023-01-06 | 潍柴动力股份有限公司 | Electromagnetic proportional valve, flow valve and hydraulic system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6023684A (en) * | 1983-07-18 | 1985-02-06 | Taiheiyo Kogyo Kk | Pilot-type solenoid valve opened while de-energized |
| US5938170A (en) * | 1995-11-24 | 1999-08-17 | Shin Caterpiller Mitsubishi Co., Ltd. | Proportional control solenoid relief valve |
| CN201322067Y (en) * | 2008-08-08 | 2009-10-07 | 宁波市鄞州通力液压电器厂 | High-speed switch valve |
| CN101925768A (en) * | 2008-01-29 | 2010-12-22 | Hydac流体技术有限公司 | Piloted valve, particularly proportional throttle valve |
| CN202176805U (en) * | 2011-09-07 | 2012-03-28 | 浙江中宝自控元件有限公司 | Energy-saving valve needle type solenoid valve |
| CN202451850U (en) * | 2012-02-16 | 2012-09-26 | 北京兰天达汽车清洁燃料技术有限公司 | Novel high-pressure electromagnetic valve |
| CN105570517A (en) * | 2014-11-04 | 2016-05-11 | 罗伯特·博世有限公司 | Valve device |
| CN106640811A (en) * | 2016-11-24 | 2017-05-10 | 浙江华益精密机械股份有限公司 | Leak-tight pressure compensation electric proportional throttle valve |
-
2017
- 2017-11-10 CN CN201711104158.3A patent/CN107701763B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6023684A (en) * | 1983-07-18 | 1985-02-06 | Taiheiyo Kogyo Kk | Pilot-type solenoid valve opened while de-energized |
| US5938170A (en) * | 1995-11-24 | 1999-08-17 | Shin Caterpiller Mitsubishi Co., Ltd. | Proportional control solenoid relief valve |
| CN101925768A (en) * | 2008-01-29 | 2010-12-22 | Hydac流体技术有限公司 | Piloted valve, particularly proportional throttle valve |
| CN201322067Y (en) * | 2008-08-08 | 2009-10-07 | 宁波市鄞州通力液压电器厂 | High-speed switch valve |
| CN202176805U (en) * | 2011-09-07 | 2012-03-28 | 浙江中宝自控元件有限公司 | Energy-saving valve needle type solenoid valve |
| CN202451850U (en) * | 2012-02-16 | 2012-09-26 | 北京兰天达汽车清洁燃料技术有限公司 | Novel high-pressure electromagnetic valve |
| CN105570517A (en) * | 2014-11-04 | 2016-05-11 | 罗伯特·博世有限公司 | Valve device |
| CN106640811A (en) * | 2016-11-24 | 2017-05-10 | 浙江华益精密机械股份有限公司 | Leak-tight pressure compensation electric proportional throttle valve |
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| CN107701763A (en) | 2018-02-16 |
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Effective date of registration: 20190218 Address after: 101500 No. 97 Hanggezhuang Village, Xitian Gezhuang Town, Miyun District, Beijing Applicant after: Beijing Dehua Litong Hydraulic Parts Manufacturing Co., Ltd. Address before: 315000 Room 013, Room 18-1, 035, 555 Juxian Road, Ningbo High-tech Zone, Ningbo City, Zhejiang Province Applicant before: Ningbo Wen fan electrical and Mechanical Technology Development Co., Ltd. |
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