CN107989840A - A kind of damping control valve - Google Patents
A kind of damping control valve Download PDFInfo
- Publication number
- CN107989840A CN107989840A CN201711184593.1A CN201711184593A CN107989840A CN 107989840 A CN107989840 A CN 107989840A CN 201711184593 A CN201711184593 A CN 201711184593A CN 107989840 A CN107989840 A CN 107989840A
- Authority
- CN
- China
- Prior art keywords
- valve
- chamber
- mouthfuls
- valve body
- damping
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/65—Methods of control of the load sensing pressure
Abstract
The invention discloses a kind of damping control valve, include the valve body for being assemblied in mounting base, LS mouthfuls and PIL mouthfuls are offered in mounting base, the first horizontal chamber and the second horizontal chamber are provided with valve body, the the first perpendicular chamber and the second perpendicular chamber being respectively communicated with the described first horizontal chamber, the second horizontal chamber are additionally provided with valve body, first perpendicular chamber extends downward into body base, and the second perpendicular chamber extends upwardly to body top, and PIL mouthfuls are connected with the described second horizontal chamber；LS mouthfuls are communicated by the damping hole being arranged on the valve body with the second perpendicular chamber, the lower part of valve body is provided with screw thread damping between the first horizontal chamber and the second horizontal chamber, first perpendicular intracavitary is provided with the first valve port, first perpendicular intracavitary is provided with and the matched check valve of the first valve port, second perpendicular intracavitary is provided with the second valve port, and the second perpendicular intracavitary is set and the matched overflow valve of the second valve port.It the advantage is that：It is rational in infrastructure, compact, can effectively buffer load sensitive pressure it fluctuate.
Description
Technical field
The present invention relates to control valve manufacturing technology field, and especially a kind of damping control valve, refers specifically to one kind and be used for
The damping control that load-sensitive pressure controls in the engineering machinery load sensory system such as wheel loader, crane, mini-excavator
Valve processed.
Background technology
Quantitative load sensitive system is widely used in loading machine because energy saving and cost is low, autocrane and mini-excavator
Etc. engineering machinery.Load-sensitive multiple directional control valve is the core element of such load sensitive system, and quantitative load sensitive system
Realize that executive component flow is distributed according to need, two-way pressure-compensated valve is the essential element of such hydraulic control system.
In practical application operating mode, since load pressure fluctuates constantly, feedback spool aperture can be caused suddenly big or suddenly small, in turn result in and hold
The shake of units
Existing Patent No. 200910052739.6 is entitled " pressure-compensated valve ", it includes valve body, spool and shuttle valve, valve
Fuel feed hole, oil outlet, oil return hole and control hole are provided with body, the bottom inlet of fuel feed hole and the bottom inlet of oil outlet are non-
It is coaxially disposed, and the bottom inlet of fuel feed hole is located at the right of the bottom inlet of oil outlet.Shuttle valve is fixedly mounted on a left side for valve body
End, two load cavities of valve body are connected with two oil inlets of shuttle valve respectively, and the main valve hole of valve body is connected with the oil outlet of shuttle valve.Spool
In valve body, spool is connected by spring with shuttle valve.It is additionally arranged the first damper to buffer in load pressure feedback chamber
Load-sensitive pressure oscillation, but it is too simple due to damping, it is unsatisfactory for the buffering of load pressure fluctuation, therefore its structure
It is further improved.
The content of the invention
The technical problem to be solved by the invention for the present situation of prior art is to provide rational in infrastructure, compact, Neng Gouyou
Imitate a kind of damping control valve of buffer load sensitive pressure fluctuation.
Technical solution is used by the present invention solves above-mentioned technical problem：
A kind of damping control valve, includes the valve body for being assemblied in mounting base, LS mouthfuls and PIL mouthfuls, valve is offered in mounting base
The first horizontal chamber and the second horizontal chamber are provided with vivo, is additionally provided with valve body and is respectively communicated with the described first horizontal chamber, the second horizontal chamber
First perpendicular chamber and the second perpendicular chamber, the first perpendicular chamber extend downward into body base, and the second perpendicular chamber extends upwardly to body top, PIL
Mouth is connected with the described second horizontal chamber；
LS mouthfuls are communicated by the damping hole that is arranged on the valve body with the second perpendicular chamber, the lower part of valve body in the first horizontal chamber and
It is provided with screw thread damping between second horizontal chamber, the first perpendicular intracavitary is provided with the first valve port, and the first perpendicular intracavitary is provided with and described the
The matched check valve of one valve port, the second perpendicular intracavitary are provided with the second valve port, and the second perpendicular intracavitary is set and the second valve port phase
The overflow valve of cooperation.
The technical measures of optimization further include：
Above-mentioned check valve includes discoidal valve seat and spherical valve head, and valve head is engaged with first valve port.
Above-mentioned overflow valve includes upper valve base, lower valve head and the spring being arranged between upper valve base and lower valve head, on
Valve seat is fixed on the top of the described second perpendicular intracavitary damping hole, and the lower valve head is located at the lower section of damping hole, and with described second
Valve port is engaged.
The perpendicular intracavitary of above-mentioned first, which is located at below the second horizontal chamber, is provided with plug.
Above-mentioned damping hole expands LS mouthfuls of sides is formed with bellmouth.
Cushion chamber has been recessed in the middle part of above-mentioned valve body.
Threaded between above-mentioned valve body and mounting base, is provided with packing ring between valve body and mounting base.
Above-mentioned LS mouths and PIL mouthfuls are arranged in parallel, valve body with LS mouthfuls, PIL mouthfuls it is perpendicular.
The opening of above-mentioned LS mouths is provided with sealing ring.
A kind of damping control valve of the present invention, it is rational in infrastructure, compact, the first horizontal chamber, the second horizontal chamber, the are provided with its valve body
One perpendicular chamber and the second perpendicular chamber, the first perpendicular intracavitary be provided with the matched check valve of the first valve port, the second perpendicular intracavitary set with
The matched overflow valve of second valve port, LS mouthfuls are communicated by the damping hole on valve body with the second perpendicular chamber, and the lower part of valve body is first
Screw thread damping is provided between horizontal chamber and the second horizontal chamber, effective buffering of load-sensitive pressure oscillation is realized by said structure；
Pass through damping hole and check valve when fluid flows into PIL mouthfuls by LS mouthfuls, when fluid flows out to LS mouthfuls by PIL mouthfuls, by overflow
Valve quick backflow.
Brief description of the drawings
Fig. 1 is the schematic cross-sectional view of the present invention；
Fig. 2 is A portions enlarged drawing in Fig. 1；
Fig. 3 is B portions enlarged drawing in Fig. 1；
Fig. 4 is the hydraulic principle figure of the present invention；
Fig. 5 is the application state schematic diagram of the present invention；
Fig. 6 is the pressure damping effect figure of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with attached drawing embodiment.
It is as shown in Figure 1 to Figure 3 the structure diagram of the present invention,
Reference numeral therein is：LS mouthfuls, PIL mouthfuls, mounting base 1, packing ring 11, valve body 2, damping hole 2a, screw thread damping 2b,
Bellmouth 2c, cushion chamber 2d, the first horizontal chamber 21, the second horizontal chamber 22, first erect chamber 23, the first valve port 23a, the second perpendicular chamber 24, the
Two valve port 24a, check valve 3, valve seat 31, valve head 32, overflow valve 4, upper valve base 41, lower valve head 42, spring 43, plug 5, sealing ring
6th, hydraulic pump 7, throttle valve 8, two-way pressure compensator 9.
As shown in Figures 1 to 6,
A kind of damping control valve, includes the valve body 2 for being assemblied in mounting base 1, LS mouthfuls and PIL mouthfuls is offered in mounting base 1,
The first horizontal 21 and second horizontal chamber 22 of chamber is provided with valve body 2, is additionally provided with and the described first horizontal chamber 21, the second horizontal chamber in valve body 2
22 the first perpendicular chambers 23 and second being respectively communicated with erect chambers 24, and the first perpendicular chamber 23 extends downward into 2 bottom of valve body, the second perpendicular chamber 24 to
On extend to the top of valve body 2, PIL mouthfuls are connected with the described second horizontal chamber 22；
LS mouthfuls are communicated by the damping hole 2a being arranged on the valve body 2 with the second perpendicular chamber 24, and the lower part of valve body 2 is first
Screw thread damping 2b is provided between horizontal 21 and second horizontal chamber 22 of chamber, the first valve port 23a, the first perpendicular chamber are provided with the first perpendicular chamber 23
Be provided with 23 with the matched check valves 3 of the first valve port 23a, be provided with the second valve port 24a in the second perpendicular chamber 24, second
Set and the matched overflow valves 4 of the second valve port 24a in perpendicular chamber 24.
In embodiment, check valve 3 includes discoidal valve seat 31 and spherical valve head 32, valve head 32 and first valve
Mouth 23a is engaged.
In embodiment, overflow valve 4 include upper valve base 41, lower valve head 42 and be arranged at upper valve base 41 and lower valve head 42 it
Between spring 43, upper valve base 41 is fixed on the top of the described second perpendicular 24 internal damping hole 2a of chamber, and the lower valve head 42 is positioned at damping
The lower section of hole 2a, and be engaged with the second valve port 24a.
In embodiment, the lower section of second horizontal chamber 22 is provided with plug 5 in the first perpendicular chamber 23.
In embodiment, damping hole 2a expands LS mouthfuls of sides is formed with bellmouth 2b.The setting of bellmouth 2b can make from LS mouthfuls
The fluid for flowing into damping hole 2a is buffered, and avoids the moment of oil passage from reducing and cause the sharp increase of oil pressure.
In embodiment, the middle part of valve body 2 has been recessed cushion chamber 2d.Cushion chamber 2d makes to hinder through screw thread from the second horizontal chamber 22
The fluid that Buddhist nun 2c flows to the first horizontal chamber 21 can be buffered effectively, avoid the moment of pressure from reducing.
In embodiment, threaded between valve body 2 and mounting base 1, is provided with packing ring 11 between valve body 2 and mounting base 1.
In embodiment, LS mouthfuls and PIL mouthfuls are arranged in parallel, valve body 2 and LS mouthfuls, PIL mouthfuls it is perpendicular.
In embodiment, LS mouthfuls of opening is provided with sealing ring 6.
Operation principle：
As shown in figure 5, this damping control valve is applied in quantitative load sensitive system, coordinate hydraulic pump 7, throttle valve 8 with
And 9 buffer load sensitive pressure of two-way pressure compensator fluctuation.
Fluid flows to PIL from LS mouthfuls and makes a slip of the tongue journey：Fluid enters the second perpendicular chamber 24 from LS mouthfuls of entrance by damping hole 2a
Interior, at this moment, the second valve port 24a in the second perpendicular chamber 24 is closed by the lower valve head 42 of overflow valve 4, and fluid enters through the first horizontal chamber 21
In first perpendicular chamber 23, then push check valve 3 open and enter the second horizontal chamber 22, finally flow into PIL mouthfuls.
Fluid flows to LS from PIL mouthfuls and makes a slip of the tongue journey：If PIL mouthfuls smaller (pressure difference is not enough to push overflow open with LS mouthfuls of pressure difference
Valve 4), after fluid enters the second horizontal chamber 22, the first horizontal chamber 21 is flowed to by screw thread damping 2c, then through the second perpendicular chamber 24, damping hole
2a flow to LS mouthfuls, this process time-lag action is obvious；If PIL mouthfuls larger with LS mouthfuls of pressure difference, the fluid of the second horizontal chamber 22 will push away
Overflow valve 4 is driven, directly through the second 24 quick backflow of perpendicular chamber.
When LS mouthfuls of pressure fluctuate, as shown in fig. 6, LS mouthfuls of pressure oscillation, its pressure value occur continuous wave crest,
Trough；When LS mouthfuls of pressure oscillations are to trough, the pressure differential between PIL mouthfuls and LS mouthfuls is smaller, and fluid is through screw thread damping 2b, resistance
Buddhist nun hole 2a flow to LS mouthfuls and realizes delay, so when PIL mouthfuls of pressure do not reach LS mouthfuls of trough also, LS mouthfuls of pressure ripple
Move to wave crest, at this time, LS mouthfuls of fluid adds to PIL mouthfuls through damping hole 2a, check valve 3, makes PIL mouthfuls of pressure span steady
It is fixed.So just realize, in LS mouthfuls of pressure oscillations, PIL mouthfuls of pressure value stabilization is being the wave crest of the pressure oscillation at LS mouthfuls
Between trough.
When quantitative load sensitive system load reduction value is very big, 9 standard-sized sheet of two-way pressure compensator, then PIL mouthfuls and LS mouthfuls
Pressure difference it is very big, it is directly that overflow valve 4 is open-top, realize quick backflow, can so realize the quick pass of two-way pressure compensator 9
Close.
Highly preferred embodiment of the present invention has illustrated, and the various change or remodeling made by those of ordinary skill in the art are not
It can depart from the scope of the present invention.
Claims (9)
1. a kind of damping control valve, includes the valve body (2) for being assemblied in mounting base (1), the mounting base offers LS on (1)
Mouthful and PIL mouthfuls, it is characterized in that：The first horizontal chamber (21) and the second horizontal chamber (22), the valve body are provided with the valve body (2)
(2) the first perpendicular chamber (23) and the second perpendicular chamber being respectively communicated with the described first horizontal chamber (21), the second horizontal chamber (22) are additionally provided with
(24), the first perpendicular chamber (23) extends downward into valve body (2) bottom, and the described second perpendicular chamber (24) extends upwardly to valve body
(2) top, PIL mouths are connected with the described second horizontal chamber (22)；
The LS mouths are communicated by the damping hole (2a) being arranged on the valve body (2) with the second perpendicular chamber (24), the valve
The lower part of body (2) is provided with screw thread damping (2b), the described first perpendicular chamber between the first horizontal chamber (21) and the second horizontal chamber (22)
(23) the first valve port (23a) is provided with, is provided with the described first perpendicular chamber (23) and is engaged with first valve port (23a)
Check valve (3), is provided with the second valve port (24a) in the described second perpendicular chamber (24), is set in the described second perpendicular chamber (24)
With the matched overflow valve of second valve port (24a) (4).
2. a kind of damping control valve according to claim 1, it is characterized in that：The check valve (3) includes disc
Valve seat (31) and spherical valve head (32), the valve head (32) is engaged with first valve port (23a).
3. a kind of damping control valve according to claim 2, it is characterized in that：The overflow valve (4) includes upper valve base
(41), lower valve head (42) and the spring (43) being arranged between upper valve base (41) and lower valve head (42), the upper valve base
(41) top in the described second perpendicular chamber (24) internal damping hole (2a) is fixed on, the lower valve head (42) is located under damping hole (2a)
Side, and be engaged with second valve port (24a).
4. a kind of damping control valve according to claim 3, it is characterized in that：It is located at second in the perpendicular chamber (23) of described first
Plug (5) is provided with below horizontal chamber (22).
5. a kind of damping control valve according to claim 4, it is characterized in that：The damping hole (2a) expands LS mouthfuls of sides
It is formed with bellmouth (2c).
6. a kind of damping control valve according to claim 5, it is characterized in that：It is recessed in the middle part of the valve body (2)
There is cushion chamber (2d).
7. a kind of damping control valve according to claim 6, it is characterized in that：Between the valve body (2) and mounting base (1)
Threaded, is provided with packing ring (11) between the valve body (2) and mounting base (1).
8. a kind of damping control valve according to claim 7, it is characterized in that：The LS mouths are arranged in parallel with PIL mouthfuls, institute
The valve body (2) stated with LS mouthfuls, PIL mouthfuls it is perpendicular.
9. a kind of damping control valve according to claim 8, it is characterized in that：The opening of the LS mouths is provided with sealing
Enclose (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711184593.1A CN107989840B (en) | 2017-11-23 | 2017-11-23 | Damping control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711184593.1A CN107989840B (en) | 2017-11-23 | 2017-11-23 | Damping control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107989840A true CN107989840A (en) | 2018-05-04 |
| CN107989840B CN107989840B (en) | 2020-08-04 |
Family
ID=62031796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711184593.1A Active CN107989840B (en) | 2017-11-23 | 2017-11-23 | Damping control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107989840B (en) |
Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2607599A (en) * | 1949-11-12 | 1952-08-19 | Borg Warner | Three-way valve |
| US3796336A (en) * | 1969-06-25 | 1974-03-12 | F Ratliff | Hydraulic system for a loader |
| DE2352170A1 (en) * | 1972-10-17 | 1974-04-18 | Poclain Sa | DEVICE FOR PRESSURE MEDIUM SUPPLY |
| DE2439933A1 (en) * | 1973-08-20 | 1975-04-17 | Z Tazkeho Strojarstva Generaln | HYDROSTATIC SERVOMECHANISM WITH ARTIFICIAL RETURN |
| GB8628335D0 (en) * | 1986-11-27 | 1986-12-31 | Baxter M D | Spool valve |
| DE69609964D1 (en) * | 1995-05-26 | 2000-09-28 | Husco Int Inc | PRESSURE COMPENSATED HYDRAULIC CONTROL SYSTEM |
| CN1337539A (en) * | 2001-09-05 | 2002-02-27 | 宁波华液机器制造有限公司 | Pressure difference feedback type precontrolled slide valve |
| CN2554387Y (en) * | 2001-12-13 | 2003-06-04 | 陈灿辉 | Damped control valve |
| CN200999772Y (en) * | 2007-04-30 | 2008-01-02 | 江苏鼎晟液压有限公司 | Double-beat drop valve |
| CN201317632Y (en) * | 2008-10-23 | 2009-09-30 | 泰安市硕力液压设备厂 | Emergency pressure relief device for tower crane hydraulic jacking system |
| CN101644285A (en) * | 2009-08-24 | 2010-02-10 | 宁波汉商液压有限公司 | Counterbalance valve for controlling hydraulic motor |
| CN202301259U (en) * | 2011-10-15 | 2012-07-04 | 徐州海伦哲专用车辆股份有限公司 | Balancing valve capable of compensating differential pressure |
| CN103089735A (en) * | 2013-01-31 | 2013-05-08 | 杨洁 | Dynamic load differential pressure protection balance valve controlled by three-level overflow valve |
| CN202991314U (en) * | 2012-12-04 | 2013-06-12 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Split type damping fuel outlet valve |
| CN103174788A (en) * | 2013-03-20 | 2013-06-26 | 安徽江淮汽车股份有限公司 | Damping control valve and damping adjusting structure of hydraulic absorber |
| CN203395281U (en) * | 2013-08-21 | 2014-01-15 | 温州南方游乐设备工程有限公司 | Single-action emergency balancing valve group |
| CN203548395U (en) * | 2013-10-14 | 2014-04-16 | 陕西盛迈石油有限公司 | Plate-type hydraulic balance valve |
| CN106015434A (en) * | 2016-07-18 | 2016-10-12 | 江苏大学 | Damping regulating valve for shock absorber |
| CN106438545A (en) * | 2016-10-17 | 2017-02-22 | 浙江华益精密机械股份有限公司 | Load sensing type balance valve |
| CN105201946B (en) * | 2015-10-13 | 2017-06-27 | 钟爱生 | Load sensing system Multifunctional load stimulation pressure-control valve |
-
2017
- 2017-11-23 CN CN201711184593.1A patent/CN107989840B/en active Active
Patent Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2607599A (en) * | 1949-11-12 | 1952-08-19 | Borg Warner | Three-way valve |
| US3796336A (en) * | 1969-06-25 | 1974-03-12 | F Ratliff | Hydraulic system for a loader |
| DE2352170A1 (en) * | 1972-10-17 | 1974-04-18 | Poclain Sa | DEVICE FOR PRESSURE MEDIUM SUPPLY |
| DE2439933A1 (en) * | 1973-08-20 | 1975-04-17 | Z Tazkeho Strojarstva Generaln | HYDROSTATIC SERVOMECHANISM WITH ARTIFICIAL RETURN |
| GB8628335D0 (en) * | 1986-11-27 | 1986-12-31 | Baxter M D | Spool valve |
| DE69609964D1 (en) * | 1995-05-26 | 2000-09-28 | Husco Int Inc | PRESSURE COMPENSATED HYDRAULIC CONTROL SYSTEM |
| CN1337539A (en) * | 2001-09-05 | 2002-02-27 | 宁波华液机器制造有限公司 | Pressure difference feedback type precontrolled slide valve |
| CN2554387Y (en) * | 2001-12-13 | 2003-06-04 | 陈灿辉 | Damped control valve |
| CN200999772Y (en) * | 2007-04-30 | 2008-01-02 | 江苏鼎晟液压有限公司 | Double-beat drop valve |
| CN201317632Y (en) * | 2008-10-23 | 2009-09-30 | 泰安市硕力液压设备厂 | Emergency pressure relief device for tower crane hydraulic jacking system |
| CN101644285A (en) * | 2009-08-24 | 2010-02-10 | 宁波汉商液压有限公司 | Counterbalance valve for controlling hydraulic motor |
| CN202301259U (en) * | 2011-10-15 | 2012-07-04 | 徐州海伦哲专用车辆股份有限公司 | Balancing valve capable of compensating differential pressure |
| CN202991314U (en) * | 2012-12-04 | 2013-06-12 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Split type damping fuel outlet valve |
| CN103089735A (en) * | 2013-01-31 | 2013-05-08 | 杨洁 | Dynamic load differential pressure protection balance valve controlled by three-level overflow valve |
| CN103174788A (en) * | 2013-03-20 | 2013-06-26 | 安徽江淮汽车股份有限公司 | Damping control valve and damping adjusting structure of hydraulic absorber |
| CN203395281U (en) * | 2013-08-21 | 2014-01-15 | 温州南方游乐设备工程有限公司 | Single-action emergency balancing valve group |
| CN203548395U (en) * | 2013-10-14 | 2014-04-16 | 陕西盛迈石油有限公司 | Plate-type hydraulic balance valve |
| CN105201946B (en) * | 2015-10-13 | 2017-06-27 | 钟爱生 | Load sensing system Multifunctional load stimulation pressure-control valve |
| CN106015434A (en) * | 2016-07-18 | 2016-10-12 | 江苏大学 | Damping regulating valve for shock absorber |
| CN106438545A (en) * | 2016-10-17 | 2017-02-22 | 浙江华益精密机械股份有限公司 | Load sensing type balance valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107989840B (en) | 2020-08-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6961448B2 (en) | Multiple control type hydraulic circuit | |
| CN104481958B (en) | A kind of confluence selection function pilot operated valve device and loading machine determine variable delivery hydraulic system | |
| CN103742473B (en) | Split type pilot load control valve | |
| US9988792B2 (en) | Hydraulic apparatus based on confluence control mode | |
| CN104989690B (en) | Overload relief valve | |
| CN103573735B (en) | Guide's heavy traffic load control valve of application displacement-force feedback principle | |
| CN105909844A (en) | Proportional type proportional pressure reducing valve | |
| CN103244492A (en) | Tee-joint pressure compensator of metering pump load-sensitive hydraulic system | |
| CN102996556A (en) | Direct-acting type hydraulic threaded cartridge balanced valve | |
| CN104132016A (en) | Three-way flow valve, load-sensitive multi-way valve, hydraulic system and engineering machine | |
| CN105114665A (en) | Flow and pressure control valve | |
| CN203655762U (en) | Split type pilot load control valve | |
| CN203548397U (en) | Pilot high-flow load control valve based on displacement-force feedback principle | |
| CN107989840A (en) | A kind of damping control valve | |
| CN203770276U (en) | Double-way oil supply priority valve | |
| CN105840570B (en) | A kind of load sensing multi-way valve first and multi-way valve | |
| KR200467301Y1 (en) | Volume booster with low vibration and low noise | |
| CN107762998B (en) | Load-sensitive pressure filters valve | |
| JPH0343679A (en) | Regulating valve of hydlaulically controlable adjust pump | |
| CN108150471B (en) | A kind of two-way one-way speed-regulating valve | |
| CN107975508A (en) | Orifice valve | |
| CN201486946U (en) | Pressure-compensated valve | |
| CN108131346B (en) | A kind of threeway one-way speed-regulating valve | |
| CN105065360A (en) | Constant-power control device and pressure variable control method thereof | |
| CN107990021B (en) | A kind of direct-acting triple pressure reducing valve with pressure feedback structure |
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: 20200709 Address after: No.8 Shangni Industrial Zone, Luoyang street, Luqiao District, Taizhou City, Zhejiang Province Applicant after: Taizhou Luqiao Jiawei shoes and hats factory Address before: 315000 Zhejiang province Ningbo city Ningbo high tech Zone Juxian Road No. 555 building 035 room 18-1 No. 013 station Applicant before: NINGBO WENZE ELECTROMECHANICAL TECHNOLOGY DEVELOPMENT Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |