CN107631064B - Proportional check flow valve for low loads - Google Patents
Proportional check flow valve for low loads Download PDFInfo
- Publication number
- CN107631064B CN107631064B CN201711103469.8A CN201711103469A CN107631064B CN 107631064 B CN107631064 B CN 107631064B CN 201711103469 A CN201711103469 A CN 201711103469A CN 107631064 B CN107631064 B CN 107631064B
- Authority
- CN
- China
- Prior art keywords
- valve
- hole
- hydraulic fluid
- fluid port
- plug
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Landscapes
- Magnetically Actuated Valves (AREA)
Abstract
The present invention relates to a kind of ratio one-way flow valves that can be used for low-load, 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 the first through flow hole, the second through flow hole and 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, throttling valve core will be gradually reduced the opening of throttle orifice.It is the ratio one-way flow valves that can be used for low-load 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 that can be used for low-load.
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, can be used for low-load.
The technical scheme of the invention to solve the technical problem is: a kind of ratio one-way flow that can be used for low-load
Measure valve, it is characterised in that: including valve body, the lower thread of valve body is connected with the valve pocket with the stepped hole axially penetrated through, valve pocket
Lower ending opening form the first hydraulic fluid port, be provided with the second hydraulic fluid port being connected to stepped hole, the small hole portion of stepped hole on the side wall of valve pocket
Input end form the valve port for being connected to first hydraulic fluid port and the second hydraulic fluid port；Stepped main valve plug, main valve are equipped in valve pocket
The periphery conical surface and valve port of core cooperate, so that moving up and down for main valve plug can open and close valve port, the top in the main valve plug is formed
Control chamber, the lower part in main valve plug form the installation cavity communicated with the first hydraulic fluid port, it is oily that connection second are provided on the side wall of main valve plug
First damping hole of mouth and control chamber, the inside of main valve plug are equipped with the second damping hole to be connected to control chamber and installation cavity, and
Aperture of the aperture of first damping hole less than the second damping hole；The pilot valve that can be moved up and down is equipped in the control chamber, first
Guide valve core can be moved up and down by being mounted on the proportion electro-magnet structure control of valve body upper end, the lower end of pilot valve and the second resistance
Buddhist nun Kong Peihe, so that pilot valve moves up and down the opening degree that can control the second damping hole；It is equipped in the installation cavity
Bushing and valve seat, valve seat are located at below bushing, and the lower end aperture of valve seat with the first hydraulic fluid port to communicate, in bushing periphery and installation cavity
Hole is formed with annular channel, has the first through flow hole, the second through flow hole and throttle orifice radially axially penetrated through in bushing, the
Two through flow holes and throttle orifice are communicated with annular channel, and throttling valve core, the upper end convex shoulder of throttling valve core and first are equipped in valve seat
Through flow hole is slidably matched and is separated for upper and lower two chamber, and the second through flow hole is communicated with the epicoele of the first through flow hole, throttle orifice and
The cavity of resorption of first through flow hole communicates, and the lower end of throttling valve core is provided with the oil-through-hole of connection the first hydraulic fluid port and the first through flow hole cavity of resorption,
The first spring is supported with below throttling valve core, which makes throttling valve core stay open the state of throttle orifice, works as throttling
When spool overcomes the first acting force of the spring to move downward, throttling valve core will be gradually reduced the aperture of throttle orifice.
In one embodiment, the upper end of the throttling valve core from top to bottom includes with the first through flow hole mating part
Convex shoulder and the first cylinder, the diameter of convex shoulder are greater than the diameter of the first cylinder, convex shoulder and the first cylinder can in this way formed enough
Big annulus flow area.
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.Specifically
, when the second hydraulic fluid port oil inlet, when proportion electro-magnet structure being made to give certain voltage, proportion electro-magnet structure generates certain suction
Power, armature part overcome the power of second spring to generate certain upward displacement, pilot valve are driven to be separated from the second damping hole, this
When control intracavitary pressure and will decline, the pressure in the pressure and control chamber of the second hydraulic fluid port has pressure difference, this differential pressure action is in main valve
On core (main valve plug 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 to increase ratio
Voltage on example electromagnet structure, 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
The oil liquid of two hydraulic fluid ports flows to the first hydraulic fluid port.Continue to increase to the voltage of proportion electro-magnet structure, the second damping hole and pilot valve
Between area of passage reach maximum, main valve plug fully opens at this time.If the pressure of the second hydraulic fluid port is bigger, the oil in control chamber
Liquid pushes throttling valve core that the compressing force of the first spring is overcome to move downward, keeps throttling valve core upper end convex after the second damping hole
Shoulder gradually covers in throttle orifice, reduces the area of passage of throttle orifice, the pressure reduction in control chamber will not be made excessive in this way, thus
Keep main valve plug opening excessive；And when the pressure of the second hydraulic fluid port is relatively low, oil liquid is not enough to overcome the first bullet after the second damping hole
When the compressing force of spring, throttling valve core is in the position for fully opening throttle orifice, and area of passage is maximum, therefore the pressure of control chamber can
To obtain biggish release, the pressure of the second hydraulic fluid port and the available guarantee of the pressure difference of control chamber, make main valve plug in the second hydraulic fluid port
Pressure it is lower when can also reach larger open.
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 can be used for low-load, including valve body 1, the lower thread of valve body 1, which is connected with, to be had
The valve pocket of the stepped hole 21 axially penetrated through, 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 ladder
Second hydraulic fluid port B of hole connection, the input end of the small hole portion of stepped hole 21 form the valve port of connection the first hydraulic fluid port A and the second hydraulic fluid port B
22。
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 7 periphery of bushing and 32 inner hole of installation cavity are formed with annular channel 33, has first axially penetrated through in bushing 7
Through flow hole 71, the second through flow hole 72 and throttle orifice 73 radially, the second through flow hole 72 and throttle orifice 73 with annular channel 33
Communicate, be equipped with throttling valve core 9 in valve seat 8, the upper end convex shoulder 91 of throttling valve core 9 and the first through flow hole 71 be slidably matched and by its every
Break as upper and lower two chamber, the second through flow hole 72 is communicated with the epicoele of the first through flow hole 71, under throttle orifice 73 and the first through flow hole 71
Chamber communicates, and the lower end of throttling valve core 9 is provided with the oil-through-hole 93 of connection the first hydraulic fluid port A and 71 cavity of resorption of the first through flow hole, throttling valve core
91 lower section is supported with the first spring 10, which makes throttling valve core 9 stay open 73 state of throttle orifice, works as throttle valve
When core 9 overcomes 10 active force of the first spring to move downward, throttling valve core 9 will be gradually reduced the aperture of throttle orifice 73.
The working principle of the invention and process are 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 the convex shoulder 91 of throttling valve core 9 is made gradually to cover in throttle orifice 73, reduces throttle orifice 73
Area of passage, oil liquid flow into the second through flow hole 72 through the epicoele of the first through flow hole 71, enter back into after annular channel 33 through throttle orifice
73 outflows, will not make the pressure reduction in control chamber 31 excessive in this way, cause main valve plug 3 is made to be open excessive；And as the second hydraulic fluid port B
Pressure it is relatively low, when oil liquid is not enough to overcome after the second damping hole 4b the compressing force of the first spring 10, throttling valve core 9 is in
By the completely open state of throttle orifice 73, the area of passage of throttle orifice 73 is maximum, thus control chamber 31 pressure it is available compared with
Big release, the available guarantee of pressure difference of the pressure and control chamber 31 of the second hydraulic fluid port B, makes main valve plug 3 in the pressure of the second hydraulic fluid port B
Also it can reach larger open when power is lower.
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 that can be used for low-load, it is characterised in that: including valve body (1), the lower end spiral shell of valve body (1)
Line is connected with the valve pocket with the stepped hole (21) axially penetrated through, and the lower ending opening of valve pocket (2) forms the first hydraulic fluid port (A), valve pocket
(2) the second hydraulic fluid port (B) being connected to stepped hole is provided on side wall, the input end of the small hole portion of stepped hole (21) forms connection institute
State the valve port (22) of the first hydraulic fluid port (A) and the second hydraulic fluid port (B)；Stepped main valve plug (3), main valve plug are equipped in valve pocket (2)
(3) the periphery conical surface and valve port (22) cooperates, so that moving up and down for main valve plug (3) can open and close valve port (22), in main valve plug (3)
Top form control chamber (31), the installation cavity (32) communicated with the first hydraulic fluid port (A), main valve are formed at the lower part in main valve plug (3)
The first damping hole (4a) of connection the second hydraulic fluid port (B) and control chamber (31), the inside of main valve plug (3) are provided on the side wall of core (3)
Equipped with the second damping hole (4b) to be connected to control chamber (31) Yu installation cavity (32), and the aperture of the first damping hole (4a) is less than
The aperture of second damping hole (4b)；The pilot valve (5) that can be moved up and down, pilot valve (5) are equipped in the control chamber (31)
Proportion electro-magnet structure (6) by being mounted on valve body (1) upper end is controlled and can be moved up and down, the lower end of pilot valve (5) and the
Two damping holes (4b) cooperation, so that pilot valve (5) moves up and down the opening degree that can control the second damping hole (4b)；It is described
Bushing (7) and valve seat (8) be installed in installation cavity (32), valve seat (8) is located at bushing (7) lower section, the lower end aperture of valve seat (8) with
It is communicated with the first hydraulic fluid port (A), bushing (7) periphery and installation cavity (32) inner hole are formed with annular channel (33), are had in bushing (7)
The first through flow hole (71), the second through flow hole (72) and throttle orifice (73) radially axially penetrated through, second through flow hole
(72) it is communicated with annular channel (33) with throttle orifice (73), is equipped with throttling valve core (9) in the valve seat (8), throttling valve core (9)
Upper end convex shoulder (91) and the first through flow hole (71) be slidably matched and separate be upper and lower two chamber, second through flow hole (72)
It is communicated with the epicoele of the first through flow hole (71), the throttle orifice (73) communicates with the cavity of resorption of the first through flow hole (71), throttling valve core
(9) lower end is provided with the oil-through-hole (93) of connection the first hydraulic fluid port (A) and the first through flow hole (71) cavity of resorption, under throttling valve core (91)
Side is supported with the first spring (10), which makes throttling valve core (9) stay open the state of throttle orifice (73), works as section
When flow valve core (9) overcomes the first spring (10) active force to move downward, the convex shoulder (91) will be gradually reduced throttle orifice (73)
Aperture.
2. the ratio one-way flow valves according to claim 1 that can be used for low-load, it is characterised in that: the throttling valve core
(9) upper end and the first through flow hole (71) mating part from top to bottom includes convex shoulder (91) and the second cylinder (92), the convex shoulder
(91) diameter is greater than the diameter of the second cylinder (92).
3. the ratio one-way flow valves according to claim 1 that can be used for low-load, it is characterised in that: the ratio electromagnetism
Iron construction (6) includes determining iron part (61), armature part (62), second spring (63) and coiler part (64), described to determine iron portion
The upper end for dividing (61) to plug and be weldingly fixed in valve body (1), armature part (62) are set in valve body (1) and can move up and down,
The upper end of the pilot valve (5) is connected to the lower end of armature part (62) and can move up and down with armature part (62), described
Second spring (63), which is supported on, determines between iron part (61) and armature part (62), and the coiler part (64) is set in and constrains
On valve body (1) top induction can be formed to iron part (61) are determined.
4. the ratio one-way flow valves according to claim 3 that can be used for low-load, it is characterised in that: the armature part
(62) lower end is equipped with T-slot (621), and (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 according to claim 4 that can be used for low-load, it is characterised in that: the pilot valve
(5) surface cooperated between lower end and the second damping hole (4b) is the conical surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711103469.8A CN107631064B (en) | 2017-11-10 | 2017-11-10 | Proportional check flow valve for low loads |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711103469.8A CN107631064B (en) | 2017-11-10 | 2017-11-10 | Proportional check flow valve for low loads |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107631064A CN107631064A (en) | 2018-01-26 |
| CN107631064B true CN107631064B (en) | 2019-04-26 |
Family
ID=61108593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711103469.8A Withdrawn - After Issue CN107631064B (en) | 2017-11-10 | 2017-11-10 | Proportional check flow valve for low loads |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107631064B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108709007B (en) * | 2018-06-12 | 2020-02-14 | 江苏金晟元特种阀门股份有限公司 | Electromagnetic stop valve |
| 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 |
| DE102019218401B3 (en) * | 2019-11-27 | 2021-04-01 | Hawe Hydraulik Se | Load holding valve, load holding valve set and method for assembling a load holding valve |
| CN111720382B (en) * | 2020-06-30 | 2022-04-26 | 潍柴动力股份有限公司 | A load holding valve and hydraulic control system |
| CN115891789B (en) * | 2021-09-30 | 2024-09-10 | 比亚迪股份有限公司 | Damping regulating valve, damper and vehicle |
Citations (7)
| 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 |
| CN102439341A (en) * | 2009-04-30 | 2012-05-02 | Hydac流体技术有限公司 | Proportional throttle valve |
| CN203348653U (en) * | 2013-06-26 | 2013-12-18 | 无锡商业职业技术学院 | Directly-operated type sequence valve |
| CN103511377A (en) * | 2012-06-19 | 2014-01-15 | 上海立新液压有限公司 | One-way proportional flow valve |
| CN105443837A (en) * | 2015-12-07 | 2016-03-30 | 浙江华益精密机械股份有限公司 | Electromagnetic proportional flow 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 | Non-leakage pressure compensated electro-proportional throttle valve |
-
2017
- 2017-11-10 CN CN201711103469.8A patent/CN107631064B/en not_active Withdrawn - After Issue
Patent Citations (7)
| 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 |
| CN102439341A (en) * | 2009-04-30 | 2012-05-02 | Hydac流体技术有限公司 | Proportional throttle valve |
| CN103511377A (en) * | 2012-06-19 | 2014-01-15 | 上海立新液压有限公司 | One-way proportional flow valve |
| CN203348653U (en) * | 2013-06-26 | 2013-12-18 | 无锡商业职业技术学院 | Directly-operated type sequence valve |
| CN105570517A (en) * | 2014-11-04 | 2016-05-11 | 罗伯特·博世有限公司 | Valve device |
| CN105443837A (en) * | 2015-12-07 | 2016-03-30 | 浙江华益精密机械股份有限公司 | Electromagnetic proportional flow valve |
| CN106640811A (en) * | 2016-11-24 | 2017-05-10 | 浙江华益精密机械股份有限公司 | Non-leakage pressure compensated electro-proportional throttle valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107631064A (en) | 2018-01-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107631064B (en) | Proportional check flow valve for low loads | |
| CN100441885C (en) | Hydraulic balance valve that automatically adapts to load changes | |
| CN107701763B (en) | The ratio one-way flow valves of performance improvement | |
| CN202510790U (en) | Pilot-operated cage type single seat regulating valve | |
| CN202790565U (en) | Balance valve | |
| CN107504006B (en) | A kind of normally opened ratio one-way flow valves | |
| CN109026889B (en) | buffer relief valve | |
| CN107654435B (en) | A kind of proportional flow shut-off valve | |
| CN104455548B (en) | A kind of fluid regeneration valve and method of work thereof | |
| CN107883028B (en) | The ratio one-way flow valves of double-direction control | |
| CN105909844A (en) | Proportional type proportional pressure reducing valve | |
| CN107781496B (en) | A kind of double-direction control electromagnetic proportional valve | |
| CN107989848B (en) | Energy-saving sequence valve | |
| CN108825577B (en) | Balance valve with variable hydraulic control ratio | |
| CN108150473B (en) | A kind of buffer overflow valve | |
| CN107940051A (en) | A kind of precursor overflow valve of quick response | |
| CN107830005A (en) | A kind of electromagnetic proportional valve | |
| CN107882794A (en) | Double-direction control electromagnetic proportional valve | |
| CN107524817B (en) | A kind of normally closed ratio one-way flow valves | |
| CN107725879A (en) | A kind of normally closed ratio one-way flow valves | |
| CN108775431A (en) | Balance valve | |
| CN109139319A (en) | A kind of common-rail injector | |
| CN108843642A (en) | A kind of solenoid valve for movable arm cylinder of excavator | |
| CN107989843A (en) | A kind of two-way stop proportional flow control valve | |
| CN107989844B (en) | A kind of leakage-free pressure compensation electromagnetic proportioning valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20190404 Address after: 221400 Minjiang Road, Wuxi-Xinyi Industrial Park, Xinyi City, Xuzhou City, Jiangsu Province Applicant after: JIANGSU SIDA HEAVY INDUSTRY 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 WENZE ELECTROMECHANICAL TECHNOLOGY DEVELOPMENT Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190426 Effective date of abandoning: 20250728 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20190426 Effective date of abandoning: 20250728 |