CN106438545A - Load sensing type balance valve - Google Patents
Load sensing type balance valve Download PDFInfo
- Publication number
- CN106438545A CN106438545A CN201610905053.7A CN201610905053A CN106438545A CN 106438545 A CN106438545 A CN 106438545A CN 201610905053 A CN201610905053 A CN 201610905053A CN 106438545 A CN106438545 A CN 106438545A
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- 238000007789 sealing Methods 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 230000008859 change Effects 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 9
- 238000013016 damping Methods 0.000 claims description 8
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims description 3
- 238000003032 molecular docking Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 2
- 238000007906 compression Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 208000031481 Pathologic Constriction Diseases 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 210000001215 vagina Anatomy 0.000 description 1
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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a load sensing type balance valve. The load sensing type balance valve comprises a valve sleeve. A front valve sleeve cavity is formed in the front portion of the valve sleeve, and a rear valve sleeve cavity is formed in the rear portion of the valve sleeve. A main valve cavity comprises a front segment cavity body, a middle segment cavity body and a rear segment cavity body. A main valve element is arranged in the main valve cavity. The rear valve sleeve cavity is internally provided with a reset spring and a spring seat, wherein the reset spring is connected with the front end of the main valve element in an abutted manner, and the spring seat is connected with the front end of the reset spring in an abutted manner. A one-way valve achieving communicating from the rear portion to the front portion in one direction is arranged at the front portion of the middle segment cavity body, and connection and disconnection of the one-way valve are controlled through the main valve element. A valve body is provided with a load opening communicating with the rear portion of the middle segment cavity body. The valve body is provided with an oil outlet communicating with the rear portion of the front segment cavity body. The balance valve is provided with a load sensing oil channel enabling the load opening to communicate with the front valve sleeve cavity. A plunger adjusting assembly driven by load sensing hydraulic pressure oil conveyed through the load sensing oil channel is arranged between the front valve sleeve cavity and the rear valve sleeve cavity. According to the load sensing type balance valve, when a small load or no load exists, the pilot pressure will be reduced along with reducing of the load, and the purpose of saving energy is achieved.
Description
Technical field
The present invention relates to hydraulic valve, and in particular to balanced valve.
Background technology
Balanced valve, also known as load movement control valve, also has title motion control valve, by increasing back during load movement
Oily back pressure, realizes balanced load, and held stationary moves, and as pilot port and working hole connect the work of actuator respectively
Mouthful, closed loop control can be formed, effective regime flow, thus play stabilized speed function.As balanced valve mainly increases back pressure, and
And set pressure generally bigger than maximum load 30%～50%, thus balanced valve is belonging to dissipative cell in systems, passes through
The consumption of power is stable to obtain.Currently available technology is all fixing setting pressure, generally 1.3～1.5 times maximum loads, when
Load diminishes or similarly needs the so big back pressure of full load when unloaded, thus must increase pilot pressure, is set with opening
Fixed pressure, this will result in unnecessary idle work output, cause energy dissipation.
Therefore, current balanced valve there is in use, 1, set pressure can not with load size and change；
2nd, pilot control pressure changes with the change of load；3rd, need to preset pressure according to load；4th, power consumption is big.
Content of the invention
The technical problem to be solved is exactly to provide a kind of load-transducing type balanced valve so that main valve plug reset bullet
The pressure that sets of spring changes with the change of load.
For solving above-mentioned technical problem, the present invention is adopted the following technical scheme that：Load-transducing type balanced valve, including being provided with master
The valve body of valve pocket and the valve pocket for docking with main valve chamber front opening, the front portion of the valve pocket is provided with front valve pocket chamber, the valve pocket
Rear portion is provided with rear valve pocket chamber, and the main valve chamber includes leading portion cavity, stage casing cavity and back segment cavity, before the valve pocket is provided with insertion
The cylinder section of section cavity, is provided with main valve plug in the main valve chamber, the rear valve pocket intracavity is provided with and answering that main valve plug front end abuts
The position spring and spring base for abutting with back-moving spring front end, the front portion of the stage casing cavity be provided with unilaterally connected from the front to the back and by
The check valve of main valve plug control break-make, offers the load port for connecting with stage casing chamber rear, on the valve body on the valve body
The oil-out for connecting with leading portion chamber rear is offered, and the balanced valve is provided with the load-transducing that load port is connected with front valve pocket chamber
Oil duct, is provided with the load-transducing hydraulic pressure oil for being transmitted by load-transducing oil duct between the front valve pocket chamber and rear valve pocket chamber
The plunger adjusting part of driving, the plunger adjusting part is acted on spring base and back-moving spring is adjusted multiple so as to realize
The setting pressure of position spring changes with load pressure and changes.
Preferably, the middle part of the cylinder section is provided with the sealing flange for coordinating with the slipper seal of leading portion cavity internal perisporium, institute
Stating valve pocket and the stud section being connected with main valve chamber mouth thread being provided with front side of cylinder section, the leading portion cavity is in sealing flange and spiral shell
Between shell of column formed before annular housing, the leading portion cavity be provided with rear side of sealing flange after annular housing.
Preferably, the load-transducing oil duct includes anterior axially axially extending section and axial direction from load port to valve body
The vertical and radial section that connects with front annular housing in the front end of section, the stud section is communicated with front annular housing and front valve pocket chamber
Intercommunicating pore.
Preferably, the first damping screw plug is provided with the radial section.
Preferably, the front portion of the main valve plug is provided with first conical surface for coordinating with check valve, and the main valve plug is in the first cone
Second conical surface being oppositely arranged with first conical surface is provided with rear side of face, and the rear portion of the main valve plug is provided with and back segment cavity slipper seal
Cylinder seal section, second conical surface by load port hydraulic pressure oil hydraulic action area be A1, first conical surface
It is A2 by the hydraulic action area of the hydraulic pressure oil of load port so that main valve plug is by the hydraulic pressure oil active area of load port
For A2-A1, the plunger adjusting part is A3 by the hydraulic action area of hydraulic pressure oil, and A3 is 1.3 times of A2-A1.
Preferably, the valve pocket is provided with plunger hole between front valve pocket chamber and rear valve pocket chamber, the plunger adjusting part bag
The plunger for arranging in plunger hole slipper seal is included,
Preferably, the plunger adjusting part also include between spring base and plunger arrange steel ball, the spring base and
Plunger is provided with the taper surface with steel ball mating spherical surfaces.
Preferably, between the spring base and plunger, steel ball is provided with, the spring base and plunger are provided with and are joined with steel ball sphere
The taper surface of conjunction.
Preferably, the check valve includes valve seat and the one-way valve spring for abutting with valve seat, the valve seat and stage casing cavity
Internal perisporium sealing coordinates, and the one-way valve spring abutted with back-up ring, the stage casing cavity internal perisporium be provided with to back-up ring carry out spacing
Limited step.
Preferably, the rear portion of the valve body is provided with valve body back cavity and the guide's a bite for connecting with valve body back cavity, guide two
Mouthful, the valve body is provided with stepped hole between back segment cavity and valve body back cavity, and the step in the hole is provided with the second damping screw plug.
Preferably, the oral area in the front valve pocket chamber is provided with sealing screw plug.
The present invention is provided with the load-transducing oil duct for connecting load port with front valve pocket chamber, and load-transducing hydraulic pressure oil drives
Plunger adjusting part, so that plunger adjusting part and spring base is acted on and be adjusted back-moving spring so that back-moving spring
Set pressure to change with the change of load.While pilot pressure also changes with the size variation of load, so that little
When load or zero load, pilot pressure will reduce with load and reduce, and reach the purpose of energy-conservation.
In addition, the active area of back-moving spring place spring cavity is 1.3 times of main valve plug active area, so as to back-moving spring
User can not needed to set and adjust.
Therefore, the invention has the beneficial effects as follows：
1st, loaded self-adaptive, need not preset pressure；2nd, back pressure is higher by 30% than load forever, security performance height；3、
Vibrations are little, no utter long and high-pitched sounds；4th, 15% or so can save energy.
Description of the drawings
The invention will be further described with reference to the accompanying drawings and detailed description：
Fig. 1 is the load-transducing type balanced valve profile of the present invention；
Fig. 2 is the load-transducing type balanced valve hydraulic schematic diagram of the present invention；
Fig. 3 is the load-transducing type balanced valve partial enlarged drawing of the present invention；
Fig. 4 a is the fundamental diagram of common balanced valve；
Fig. 4 b is the fundamental diagram of the load-transducing type balanced valve of the present invention.
Specific embodiment
Present invention is mainly used for various load the operating mode for changing greatly, such as there is unloaded and fully loaded, operating pressure when unloaded
Relatively low, it is operating pressure and higher occasion when fully loaded, consumes compared with one-hour rating in unloaded or load larger.Specifically lead
If the crane gear for being driven with hydraulic system, straddle truck, wheel-mounted crane, agricultural machinery etc. in such as lifting appliance.
As shown in Figure 1 to Figure 3, load-transducing type balanced valve, including being provided with the valve body 2 of main valve chamber and opening with main valve chamber front portion
The valve pocket 6 of mouth docking, the front portion of the valve pocket is provided with front valve pocket chamber, and the rear portion of the valve pocket is provided with rear valve pocket chamber, the front valve
The oral area of mantle cavity is provided with sealing screw plug 13.
The main valve chamber includes leading portion cavity, stage casing cavity and back segment cavity, and the valve pocket is provided with and main valve chamber oral area spiral shell
The stud section of stricture of vagina connection and the cylinder section of insertion leading portion cavity, the middle part of the cylinder section is provided with to be slided with leading portion cavity internal perisporium
Dynamic sealing coordinate sealing flange, the leading portion cavity be provided between sealing flange and stud section before annular housing, described before
Section cavity be provided with rear side of sealing flange after annular housing.
Main valve plug 3 is provided with the main valve chamber, and the rear valve pocket intracavity is provided with the back-moving spring 8 for abutting with main valve plug front end
And the spring base 10 for abutting with back-moving spring front end, the front portion of the stage casing cavity is provided with unilaterally connected from the front to the back and by main valve
The check valve 5 of core control break-make, is offered the load port C2 for being connected with stage casing chamber rear, opens on the valve body on the valve body
It is provided with the oil-out V2 for connecting with leading portion chamber rear.
The balanced valve is provided with the load-transducing oil duct 7 for connecting load port C2 with front valve pocket chamber, the front valve pocket chamber and after
The plunger adjusting part that the load-transducing hydraulic pressure oil for being transmitted by load-transducing oil duct drives, institute is provided between valve pocket chamber
State plunger adjusting part act on spring base 10 and back-moving spring 8 is adjusted so as to realize the setting pressure of back-moving spring with
Load pressure changes and changes.
Before the load-transducing oil duct 7 includes from load port to valve body anterior axially axially extending section and axial direction part
The vertical and radial section that connects with front annular housing in end, the stud section is communicated with connecting for front annular housing and front valve pocket chamber
Hole, is provided with the first damping screw plug 9 in the radial section.First damping screw plug 9 is dynamic antivibration, when load pressure is mutated, can
To reduce compression shock, cushioning effect is played.
The valve pocket is provided with plunger hole between front valve pocket chamber and rear valve pocket chamber, and the plunger adjusting part is included in plunger
The plunger 12 that hole slipper seal is arranged, the plunger adjusting part also includes the steel ball 11 for arranging between spring base and plunger, institute
State spring base and plunger is provided with the taper surface with steel ball mating spherical surfaces.Steel ball 11 and plunger 12 form back-moving spring float conditions dress
Put, when back-moving spring 8 weakens the swing of spring radial direction in compression process, less pressure shake and utter long and high-pitched sounds etc. unstable because
Element.
The front portion of the main valve plug is provided with first conical surface for coordinating with check valve, and the main valve plug is set on rear side of first conical surface
There are second conical surface being oppositely arranged with first conical surface, the rear portion of the main valve plug and back segment cavity slipper seal, second cone
Face is A1 by the hydraulic action area of the hydraulic pressure oil of C2 mouth, and first conical surface is made by the hydraulic pressure of the hydraulic pressure oil of C2 mouth
It is A2 with area.Main valve plug 3 has sliding poppet valve core characteristic, seals at two-stage concentric two；Primary spools 3 are made by the liquid of load port C2
Pressure pressure oil active area is annulus area (A2-A1), by Accommodation area, relative can reduce the firm of back-moving spring 8
Degree, so that back-moving spring design is not limited by a space and does not reach required rigidity.
In addition, the plunger is A3 by the hydraulic action area of hydraulic pressure oil, and A3 is 1.3 times of A2-A1.Main valve plug
3, back-moving spring 8, spring base 10, steel ball 11, plunger 12 can regard main valve plug entirety as, and main valve plug entirety rear end is subject to Pt (A2-
A1 hydraulic coupling), front end is subject to PtA3=1.3Pt (A2-A1) more than the power that rear end is subject to, thus first conical surface of main valve plug 3
To be closely against on the valve seat 5 of check valve, formed and seal well.
As Fig. 4 a, common balanced valve is once according to the size setting pressure P of load GtAfterwards, if declined in weight, it is assumed that
Balanced valve pilot ratio is K, now PiHave to be larger than (Pt-Ps)/k value can just open balanced valve so that weight declines, it can be seen that
Pt is a definite value, usually the 1.3 of maximum load times, i.e. 1.3PsmaxOnce, when unloaded, now Ps=0, i.e. Pi=Pt/
k.If adopting the invention balanced valve.Such as Fig. 4 b, due to PtWith PsChange and change and PtValue is equal to 1.3P forevers, because
And Pi=(Pt-Ps)/k=(1.3Ps-Ps)/k=0.3Ps/ k, well imagines, when load is for zero load, the pressure required for Pi will
Very little, that is to say, that the pressure of now pump output is very little, so as to reach energy-saving effect.
Plunger 12 combines to form action tank with valve pocket 6, and it A3, is just 1.3 times of A2-A1 area that active area is, steel
Ball 11 heads on spring base 10, and spring base 10 press against back-moving spring 8, equivalent to regulation spring.C2 mouth oil liquid pressure is passed through overload
Sense oil duct 7 is delivered to front valve pocket chamber, is converted into thrust through plunger 12, and the thrust magnitude is：F=PC2× A3=PC2 × 1.3 (A2-
A1), i.e., 1.3 times of main valve plug 3 are acted on equal to C2 mouth pressure.So back-moving spring set pressure is equal to valve port pressure forever
1.3 again.
The check valve includes valve seat 5 and the one-way valve spring for abutting with valve seat, the valve seat and stage casing cavity internal perisporium
Sealing coordinates, and the one-way valve spring abutted with back-up ring 4, the stage casing cavity internal perisporium be provided with back-up ring is carried out spacing spacing
Step.
The rear portion of the valve body is provided with valve body back cavity and guide's a bite C1 for connecting with valve body back cavity, two mouthfuls of V1 of guide,
The valve body is provided with stepped hole between back segment cavity and valve body back cavity, and the step in the hole is provided with the second damping screw plug 1.The
Two damping screw plugs 1 are dynamic antivibration, when guide oil pressure starts suddenly, it is possible to reduce impact, play cushioning effect.
The load-transducing type balanced valve of the present invention can be balanced the load in hydraulic system, form unidirectional, throttling, overflow etc.
Function, and balanced valve setting pressure can change self adjustment with load pressure change, it is ensured that back-moving spring compression
Power is 1.3 times that load pressure acts on main valve plug power forever, that is to say that pressure produced by back-moving spring is load pressure forever
1.3 times.Have the advantages that simple structure, without the need for regulation, safety, energy-conservation.
Claims (10)
1. load-transducing type balanced valve, it is characterised in that：Including being provided with the valve body of main valve chamber and docking with main valve chamber front opening
Valve pocket, the front portion of the valve pocket is provided with front valve pocket chamber, and the rear portion of the valve pocket is provided with rear valve pocket chamber, before the main valve chamber includes
Section cavity, stage casing cavity and back segment cavity, the valve pocket is provided with the cylinder section of insertion leading portion cavity, is provided with master in the main valve chamber
Valve element, the spring that the rear valve pocket intracavity is provided with the back-moving spring for being abutted with main valve plug front end and is abutted with back-moving spring front end
Seat, the front portion of the stage casing cavity is provided with unilaterally connected from the front to the back and is controlled the check valve of break-make, the valve body by main valve plug
On offer the load port for connecting with stage casing chamber rear, offer on the valve body fuel-displaced with what leading portion chamber rear was connected
Mouthful, the balanced valve is provided with the load-transducing oil duct for connecting load port with front valve pocket chamber, the front valve pocket chamber and rear valve pocket chamber it
Between be provided with the plunger adjusting part that the load-transducing hydraulic pressure oil for being transmitted by load-transducing oil duct drives, the plunger is adjusted
Section component is acted on spring base and back-moving spring is adjusted become with load pressure so as to realize the setting pressure of back-moving spring
Change and change.
2. load-transducing type balanced valve according to claim 1, it is characterised in that：The middle part of the cylinder section be provided with front
The sealing flange that the slipper seal of section cavity internal perisporium coordinates, the valve pocket is provided with main valve chamber mouth thread even on front side of cylinder section
The stud section for connecing, the leading portion cavity formed between sealing flange and stud section before annular housing, the leading portion cavity is close
Rear annular housing is provided with rear side of envelope flange.
3. load-transducing type balanced valve according to claim 2, it is characterised in that：The load-transducing oil duct is included from negative
Mouth is carried to the anterior axially axially extending section of radial section that is vertical with the front end of axial direction part and connecting with front annular housing of valve body,
The stud section is communicated with the intercommunicating pore in front annular housing and front valve pocket chamber.
4. load-transducing type balanced valve according to claim 3, it is characterised in that：The first damping is provided with the radial section
Screw plug.
5. the load-transducing type balanced valve according to any one of Claims 1-4, it is characterised in that：Before the main valve plug
Portion is provided with first conical surface for coordinating with check valve, and the main valve plug is provided with rear side of first conical surface and is oppositely arranged with first conical surface
Second conical surface, the rear portion of the main valve plug is provided with the cylinder seal section with back segment cavity slipper seal, and second conical surface is by negative
The hydraulic action area for carrying the hydraulic pressure oil of mouth is A1, and first conical surface is by the hydraulic action of the hydraulic pressure oil of load port
Area is A2 so that main valve plug is that A2-A1, the plunger adjusting part receives hydraulic pressure by the hydraulic pressure oil active area of load port
The hydraulic action area of pressure oil is A3, and A3 is 1.3 times of A2-A1.
6. load-transducing type balanced valve according to claim 5, it is characterised in that：The valve pocket is in front valve pocket chamber and rear valve
Plunger hole is provided between mantle cavity, and the plunger adjusting part includes the plunger for arranging in plunger hole slipper seal.
7. load-transducing type balanced valve according to claim 6, it is characterised in that：The plunger adjusting part also includes bullet
The steel ball for arranging between spring abutment and plunger, the spring base and plunger are provided with the taper surface with steel ball mating spherical surfaces.
8. load-transducing type balanced valve according to claim 1, it is characterised in that：The check valve includes valve seat and and valve
The one-way valve spring that seat is abutted, the valve seat is coordinated with stage casing cavity internal perisporium sealing, and the one-way valve spring is abutted with back-up ring,
The stage casing cavity internal perisporium is provided with and carries out spacing limited step to back-up ring.
9. load-transducing type balanced valve according to claim 1, it is characterised in that：After the rear portion of the valve body is provided with valve body
Chamber and the guide's a bite for connecting with valve body back cavity, two mouthfuls of guide, the valve body is provided between back segment cavity and valve body back cavity
Stepped hole, the step in the hole is provided with the second damping screw plug.
10. load-transducing type balanced valve according to claim 1, it is characterised in that：The oral area in the front valve pocket chamber is provided with
Sealing screw plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610905053.7A CN106438545B (en) | 2016-10-17 | 2016-10-17 | Load-transducing type balanced valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610905053.7A CN106438545B (en) | 2016-10-17 | 2016-10-17 | Load-transducing type balanced valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106438545A true CN106438545A (en) | 2017-02-22 |
| CN106438545B CN106438545B (en) | 2018-01-19 |
Family
ID=58176167
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610905053.7A Active CN106438545B (en) | 2016-10-17 | 2016-10-17 | Load-transducing type balanced valve |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107100771A (en) * | 2017-05-15 | 2017-08-29 | 重庆红江机械有限责任公司 | A kind of new micro- spray common-rail injector |
| CN107989840A (en) * | 2017-11-23 | 2018-05-04 | 宁波文泽机电技术开发有限公司 | A kind of damping control valve |
| CN108869435A (en) * | 2018-07-20 | 2018-11-23 | 佛山信卓派思机械科技有限公司 | A kind of load-transducing type balanced valve |
| CN108930681A (en) * | 2018-08-21 | 2018-12-04 | 东莞海特帕沃液压科技有限公司 | A kind of balanced valve of Discrete control |
| CN108953267A (en) * | 2018-08-22 | 2018-12-07 | 东莞海特帕沃液压科技有限公司 | A kind of flow type balanced valve |
| CN109555745A (en) * | 2018-12-28 | 2019-04-02 | 浙江华益精密机械股份有限公司 | Pressure-control valve |
| CN114321071A (en) * | 2021-11-25 | 2022-04-12 | 江苏汇智高端工程机械创新中心有限公司 | Adjustable load pressure compensation balance valve end cover and balance valve |
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| CN101943187A (en) * | 2009-07-10 | 2011-01-12 | 上海立新液压有限公司 | One-way balancing valve with brake unlocking port |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107100771A (en) * | 2017-05-15 | 2017-08-29 | 重庆红江机械有限责任公司 | A kind of new micro- spray common-rail injector |
| CN107100771B (en) * | 2017-05-15 | 2023-06-23 | 重庆红江机械有限责任公司 | Micro-injection common rail oil sprayer |
| CN107989840A (en) * | 2017-11-23 | 2018-05-04 | 宁波文泽机电技术开发有限公司 | A kind of damping control valve |
| CN108869435A (en) * | 2018-07-20 | 2018-11-23 | 佛山信卓派思机械科技有限公司 | A kind of load-transducing type balanced valve |
| CN108930681A (en) * | 2018-08-21 | 2018-12-04 | 东莞海特帕沃液压科技有限公司 | A kind of balanced valve of Discrete control |
| CN108953267A (en) * | 2018-08-22 | 2018-12-07 | 东莞海特帕沃液压科技有限公司 | A kind of flow type balanced valve |
| CN108953267B (en) * | 2018-08-22 | 2020-08-14 | 上海昂极仪表科技有限公司 | Flow type balance valve |
| CN109555745A (en) * | 2018-12-28 | 2019-04-02 | 浙江华益精密机械股份有限公司 | Pressure-control valve |
| CN109555745B (en) * | 2018-12-28 | 2023-11-03 | 浙江三尚智迪科技有限公司 | pressure control valve |
| CN114321071A (en) * | 2021-11-25 | 2022-04-12 | 江苏汇智高端工程机械创新中心有限公司 | Adjustable load pressure compensation balance valve end cover and balance valve |
| CN114321071B (en) * | 2021-11-25 | 2024-04-02 | 江苏汇智高端工程机械创新中心有限公司 | Adjustable load pressure compensation balance valve end cover and balance valve |
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| CN106438545B (en) | 2018-01-19 |
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Denomination of invention: Load sensing balance valve Effective date of registration: 20211108 Granted publication date: 20180119 Pledgee: Diankou sub branch of Zhejiang Zhuji Rural Commercial Bank Co.,Ltd. Pledgor: Zhejiang Huayi Precision Machinery Co.,Ltd. Registration number: Y2021980011835 |
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