CN106382273A - Reversing valve integrated with hydraulic control locks - Google Patents
Reversing valve integrated with hydraulic control locks Download PDFInfo
- Publication number
- CN106382273A CN106382273A CN201610983361.1A CN201610983361A CN106382273A CN 106382273 A CN106382273 A CN 106382273A CN 201610983361 A CN201610983361 A CN 201610983361A CN 106382273 A CN106382273 A CN 106382273A
- Authority
- CN
- China
- Prior art keywords
- hydraulic control
- valve
- oil duct
- control lock
- locking
- 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.)
- Pending
Links
- 239000012530 fluid Substances 0.000 claims description 50
- 230000002457 bidirectional effect Effects 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 87
- 239000010720 hydraulic oil Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 241000209140 Triticum Species 0.000 description 2
- 235000021307 Triticum Nutrition 0.000 description 2
- 238000012271 agricultural production Methods 0.000 description 2
- 238000003306 harvesting Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000003068 static effect Effects 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
-
- 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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/26—Locking mechanisms
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Preventing Unauthorised Actuation Of Valves (AREA)
Abstract
The invention provides a reversing valve integrated with hydraulic control locks, comprising a valve body, a first oil passage arranged inside the valve body and a valve rod for controlling the first oil passage to be connected with a second oil passage or a third oil passage; the valve rod is used for controlling the second oil passage to be connected with a fourth oil passage or controlling the third oil passage to be connected with a fifth oil passage; two ends of the valve rod are provided with power units; a push rod is arranged between the second oil passage and the third oil passage; the second oil passage is connected with a first oil port through a first hydraulic control lock; the third oil passage is connected with a second oil port through a second hydraulic control lock; and the push rod pushes away the first hydraulic control lock when being close to the second oil passage and pushes away the second hydraulic control lock when being close to the third oil passage. The reversing valve can be more conveniently used.
Description
Technical field
The present invention relates to reversal valve technical field, the reversal valve of more particularly, to a kind of integrated hydraulic control lock.
Background technology
In hydraulic system, reversal valve is one of main element.When reversal valve works it is often necessary to reversal valve connect
Load elements keep relative height, such as harvest the ceding of Taiwan of wheat stubble, need to keep the height of cutting wheat stubble in harvesting, now need
Close the connection of oil inlet and oil return oil circuit, keep oil pressure to maintain the height of load.
Due to the defect of manufacturing process, there is oil liquid leakage all the time under pressure between oil circuit it is impossible to completely enclose
Oil circuit, causes the voluntarily downslide of load elements or operating mode movement position can not lock.For existing hydraulic control device, one
As all locked solving using external hydraulic control, hydraulic control lock external on reversal valve, reversal valve using more complicated.
Content of the invention
In view of this, the technical problem to be solved in the present invention is to provide a kind of reversal valve of integrated hydraulic control lock, can make to change
To valve using more convenient.
The technical scheme is that and be achieved in that：
A kind of reversal valve of integrated hydraulic control lock, including valve body, is arranged on the first oil duct in described valve body；Control described
One oil duct and the second oil duct are connected or the valve rod with the 3rd oil duct connection；Described second oil duct connects the 4th oil duct；Described 3rd
Oil duct connects the 5th oil duct；Described valve rod two ends are provided with power set；Arrange between described second oil duct and described 3rd oil duct
There is push rod；Described second oil duct connects the first hydraulic fluid port, described first hydraulic control by the first hydraulic control lock being arranged in described valve body
When lock cuts out, described first hydraulic fluid port is pointed to by described second oil duct in one-way conduction direction；Described 3rd oil duct is described by being arranged on
The second hydraulic control lock in valve body connects the second hydraulic fluid port, and when described second hydraulic control lock cuts out, one-way conduction direction is by described 3rd oil duct
Point to described second hydraulic fluid port；Described push rod near described second oil duct when, push open described first hydraulic control lock, described push rod is near institute
When stating three oil ducts, push described second hydraulic control lock open.
Preferably, the locking-valve set including respectively being arranged in described valve body is locked in described first hydraulic control lock and described second hydraulic control
With locking-valve seat, described locking-valve covers and described locking-valve cover for seat connects formation cavity, and described cavity inside is provided with locking-valve core, described locking-valve
Core connects described locking-valve seat by back-moving spring.
Preferably, it is provided with O-ring between described locking-valve set and described locking-valve body and described valve body.
Preferably, described valve rod two ends are provided with resetting means.
Preferably, it is provided with cavity between described second oil duct and described 3rd oil duct, described cavity inside slipper seal sets
Put described push rod.
Preferably, described power set connect external control device by waterproof socket.
The reversal valve of integrated hydraulic control lock proposed by the present invention, by being integrated in hydraulic control lock in reversal valve, at reversal valve
When middle position state, the locked path closing between oil duct and hydraulic fluid port of hydraulic control, thus stoping the fluid in hydraulic fluid port from being released into oil duct, prevent
Only fluid is revealed, and from without external hydraulic control lock, the use of reversal valve is more convenient.
Brief description
Fig. 1 is the structural representation of the reversal valve middle position state of the present invention integrated hydraulic control lock；
Fig. 2 is the structural representation of the reversal valve working condition of the present invention integrated hydraulic control lock.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
As shown in figure 1, the embodiment of the present invention proposes a kind of reversal valve of integrated hydraulic control lock, including valve body 10, it is arranged on
First oil duct 1 of valve inner；Control the valve rod 20 that the first oil duct 1 and the second oil duct 2 are connected or connected with the 3rd oil duct 3；The
Two oil duct 2 connects the 4th oil duct 4；3rd oil duct 3 connects the 5th oil duct 5；Valve rod 20 two ends are provided with power set 30；Second oil
It is provided with push rod 40 between road 2 and the 3rd oil duct 3；Second oil duct 2 connects first by the first hydraulic control lock 51 being arranged in valve body
Hydraulic fluid port 11, the first hydraulic control is locked 51 normally closed one-way conduction directions and is pointed to the first hydraulic fluid port 11 by the second oil duct 2；3rd oil duct 2 passes through to set
Put the second hydraulic control lock 52 connection the second hydraulic fluid port 12 in valve body, the second hydraulic control locks 52 normally closed one-way conduction directions by the 3rd oil duct
3 sensing the second hydraulic fluid ports 12；Push rod 40 near the second oil duct 2 when, push open first hydraulic control lock 51, push rod 40 near three oil ducts 3 when,
Push the second hydraulic control lock 52 open.
When the reversal valve of the embodiment of the present invention integrated hydraulic control lock is in middle position state, valve rod closes the first oil duct, and hydraulic control is locked
Close the connection of the connection, the 3rd oil duct and the second hydraulic fluid port of the second oil duct and the first hydraulic fluid port, the oil of the first hydraulic fluid port and the second hydraulic fluid port
Liquid cannot be released into oil duct, realizes zero oil liquid leakage amount in oil duct.
It can be seen that, the reversal valve of integrated hydraulic control lock proposed by the present invention, by being integrated in hydraulic control lock in reversal valve, work as commutation
When valve is in middle position state, the locked path closing between oil duct and hydraulic fluid port of hydraulic control, thus stop the fluid in hydraulic fluid port from being released into oil
Road, prevents fluid from revealing, and from without external hydraulic control lock, the use of reversal valve is more convenient.
During work, operator operate external control power set, and power set promote valve rod to move.
For example, right side power device promotes valve rod to the left.As shown in Fig. 2 valve rod under the promotion of power set to
Left side is mobile, and the first oil duct connects the second oil duct, and hydraulic oil enters the second oil duct from the first oil duct, and by the first hydraulic control lock
Check valve enters the first hydraulic fluid port, drives the device being connected with the first hydraulic fluid port；The hydraulic oil of the second oil duct promotes push rod to push open simultaneously
The check valve that one-way conduction direction is that the second hydraulic fluid port points to the 3rd oil duct is locked in second hydraulic control, thus the second hydraulic fluid port passes through the second hydraulic control
The 5th oil duct that lock oil return is connected to the 3rd oil duct, flow direction with the 3rd oil duct, completes oil return.In the same manner, left side power device produces
During motive force, valve rod moves to right, thus the device that hydraulic oil entrance is connected with the second hydraulic fluid port, by the first hydraulic fluid port oil return to the 4th oil
Road, completes to commutate.
In embodiments of the present invention, valve rod includes two sealing rings, and by the movement of valve rod, sealing ring realizes the first oil duct
Connect with the second oil duct or connect with the 3rd oil duct.
In a preferred embodiment of the invention, the first hydraulic control lock 51 and the second hydraulic control lock 52 include being arranged on valve respectively
Locking-valve set in body 10 and locking-valve seat, locking-valve set connects formation cavity with locking-valve cover for seat, and cavity inside is provided with locking-valve core, locking-valve core
Locking-valve seat is connected by back-moving spring.
In the present embodiment, locking-valve set is pressed on valve body, and locking-valve seat is pressed in locking-valve and puts, and locking-valve core is by back-moving spring even
Connect locking-valve seat, push rod can pass through locking-valve set to promote lock valve core movement, thus controlling the folding of hydraulic control lock.When push rod thrust disappears
When, lock valve core reset in the presence of back-moving spring, hydraulic control lock recovers closed mode, thus locking hydraulic fluid port.
In a preferred embodiment of the invention, it is provided with O-ring between locking-valve set and locking-valve body and valve body 10.
Wherein, O-ring is the rubber seal that a kind of section is circle, by setting with valve body 10 in locking-valve set and locking-valve body
Put O-ring, such that it is able to avoid fluid to be released into locking-valve set and locking-valve body.
In a preferred embodiment of the invention, valve rod 20 two ends are provided with resetting means 21.
Specifically, when power set obtain electric, valve rod is promoted to move, when the motive force of power set disappears, valve rod exists
Recover middle position, so that the reversal valve of integrated hydraulic control lock returns to middle position state, hydraulic control lock cuts out oil in the presence of resetting means
Connection between mouth and oil duct, prevents the oil of hydraulic fluid port from revealing in oil duct.
In a preferred embodiment of the invention, the first hydraulic control lock 51 and the second hydraulic control lock 52 are bidirectional hydraulic control lock.
Under bidirectional hydraulic control lock normally off, hydraulic fluid port is pointed to for oil duct in one-way conduction direction, during by thrust, opens conducting side
To the check valve pointing to oil duct for hydraulic fluid port, realize two-way admittance, consequently facilitating the fluid oil return of hydraulic fluid port, commutated.
In a preferred embodiment of the invention, it is provided with cavity between the second oil duct 2 and the 3rd oil duct 3, cavity inside
Slipper seal arranges push rod 40.
By being arranged on push rod slipper seal in the cavity between the second oil duct and the 3rd oil duct, oil duct can be passed through
Oil pressure promotes push rod, thus producing enough motive forces to push hydraulic control lock open, makes the commutation of the reversal valve of integrated hydraulic control lock more steady
Fixed.
Wherein, cavity two ends are provided with stopping means, for limiting the stroke of push rod, thereby may be ensured that push rod in cavity
Interior movement, without departing from cavity, leads to the leakage of hydraulic oil between oil duct.
In a preferred embodiment of the invention, power set connect external control device by waterproof socket 60.
Specifically, being applied in the big machinery of agricultural production the reversal valve of integrated hydraulic control lock more, carrying out agricultural production
When, big machinery needs outdoor operation, and the operationlocation such as rainwater or even paddy field is inevitable, and power set are by waterproof socket even
Connect external control device, power set water inlet impact operation can be avoided, such that it is able to adapt to the moist, outdoor of production process
Working environment.
In sum, the embodiment of the present invention at least can realize following effect：
In embodiments of the present invention, by being integrated in hydraulic control lock in reversal valve, when reversal valve is in middle position state, liquid
Controlling the locked path closing between oil duct and hydraulic fluid port, thus stoping the fluid in hydraulic fluid port from being released into oil duct, preventing fluid from revealing, thus
Do not need external hydraulic control lock, the use of reversal valve is more convenient.
In embodiments of the present invention, the first hydraulic control lock and the second hydraulic control lock include being arranged in valve body respectively locking-valve set and
Locking-valve seat, locking-valve set connects formation cavity with locking-valve cover for seat, and cavity inside is provided with locking-valve core, and locking-valve core is connected by back-moving spring
Locking-valve seat, push rod can pass through locking-valve set to promote lock valve core movement, thus controlling the folding of hydraulic control lock.When push rod thrust disappears
When, lock valve core reset in the presence of back-moving spring, hydraulic control lock recovers closed mode, thus locking hydraulic fluid port.
In embodiments of the present invention, it is provided with O-ring, such that it is able to avoid fluid to let out between locking-valve set and locking-valve body and valve body
Reveal into locking-valve set and locking-valve body.
In embodiments of the present invention, due to being provided with hydraulic control lock between hydraulic fluid port and oil duct, at the reversal valve of integrated hydraulic control lock
When middle position state, the locked path closing between oil duct and hydraulic fluid port of hydraulic control, thus stoping the fluid in hydraulic fluid port from being released into oil duct, prevent
Only fluid is revealed, thus locking hydraulic fluid port prevents load from falling.
In embodiments of the present invention, because cavity is provided with push rod, such that it is able to reversely open hydraulic control lock, realize load
Middle position pressurize is static, can decline after unlatching again.
In embodiments of the present invention, valve rod two ends are provided with resetting means, thus valve rod resets in time, close hydraulic oil
Road, locking hydraulic fluid port.
In embodiments of the present invention, power set connect external control device by waterproof socket, and power can be avoided to fill
Put and affect operation into water, such that it is able to adapt to moist, the outdoor working environment of production process.
Last it should be noted that：The foregoing is only presently preferred embodiments of the present invention, be merely to illustrate the skill of the present invention
Art scheme, is not intended to limit protection scope of the present invention.All spirit in the present invention and, that is done within principle any repaiies
Change, equivalent, improvement etc., be all contained in protection scope of the present invention.
Claims (7)
1. a kind of reversal valve of integrated hydraulic control lock, it is characterised in that including valve body, is arranged on the first oil duct in described valve body；
Control the valve rod that described first oil duct and the second oil duct are connected or connected with the 3rd oil duct；Described second oil duct connects the 4th oil
Road；Described 3rd oil duct connects the 5th oil duct；Described valve rod two ends are provided with power set；Described second oil duct and the described 3rd
It is provided with push rod between oil duct；Described second oil duct connects the first hydraulic fluid port, institute by the first hydraulic control lock being arranged in described valve body
State one-way conduction direction when the first hydraulic control lock cuts out and described first hydraulic fluid port is pointed to by described second oil duct；Described 3rd oil duct passes through
The second hydraulic control lock being arranged in described valve body connects the second hydraulic fluid port, and when described second hydraulic control lock cuts out, one-way conduction direction is by institute
State the 3rd oil duct and point to described second hydraulic fluid port；Described push rod near described second oil duct when, push open described first hydraulic control lock, described
Push rod near described three oil duct when, push open described second hydraulic control lock.
2. the reversal valve that integrated hydraulic control is locked as claimed in claim 1 is it is characterised in that described first hydraulic control is locked and described second
Hydraulic control lock includes the locking-valve set being arranged in described valve body and locking-valve seat respectively, and described locking-valve set is connect with described locking-valve cover for seat and formed
Cavity, described cavity inside is provided with locking-valve core, and described locking-valve core connects described locking-valve seat by back-moving spring.
3. as claimed in claim 2 integrated hydraulic control lock reversal valve it is characterised in that described locking-valve set and described locking-valve body with
It is provided with O-ring between described valve body.
4. the reversal valve of the integrated hydraulic control lock as described in claim 1 is it is characterised in that described valve rod two ends are provided with reset dress
Put.
5. the reversal valve of the integrated hydraulic control lock as described in claim 1 is it is characterised in that described first hydraulic control is locked and described second
Hydraulic control is locked for bidirectional hydraulic control lock.
6. as claimed in claim 1 the reversal valve of integrated hydraulic control lock it is characterised in that described second oil duct and described 3rd oil
It is provided with cavity, described cavity inside slipper seal arranges described push rod between road.
7. the reversal valve of the integrated hydraulic control lock as described in claim any one of 1-6 is it is characterised in that described power set pass through
Waterproof socket connects external control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610983361.1A CN106382273A (en) | 2016-11-08 | 2016-11-08 | Reversing valve integrated with hydraulic control locks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610983361.1A CN106382273A (en) | 2016-11-08 | 2016-11-08 | Reversing valve integrated with hydraulic control locks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106382273A true CN106382273A (en) | 2017-02-08 |
Family
ID=57956968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610983361.1A Pending CN106382273A (en) | 2016-11-08 | 2016-11-08 | Reversing valve integrated with hydraulic control locks |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106382273A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218413A (en) * | 2017-07-05 | 2017-09-29 | 圣邦集团有限公司 | A kind of banked direction control valves with hydraulic pressure lock function |
| CN108571488A (en) * | 2017-03-13 | 2018-09-25 | 上海融德机电工程设备有限公司 | Pulsed hydraulic pressure divides synchronous valve |
| CN110789509A (en) * | 2019-12-05 | 2020-02-14 | 合肥协力液压科技有限公司 | A mechanical double-chamber balanced brake valve |
| CN117189707A (en) * | 2023-11-06 | 2023-12-08 | 合肥协力液压科技有限公司 | Electromagnetic reversing multi-way valve for paddy field tractor |
| CN119508302A (en) * | 2025-01-20 | 2025-02-25 | 合肥协力液压科技有限公司 | Hydraulic lock core has steel ball seal structure |
| CN119508302B (en) * | 2025-01-20 | 2025-04-11 | 合肥协力液压科技有限公司 | A hydraulic lock with a lock core having a steel ball sealing structure |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2661984Y (en) * | 2003-11-14 | 2004-12-08 | 段会强 | Multichannel hydraulic locking reversing valve |
| CN201560992U (en) * | 2009-04-30 | 2010-08-25 | 泸州江阳长江液压科技有限公司 | Pilot-operated hydraulic lock multi-way directional valve set |
| CN202301253U (en) * | 2011-10-24 | 2012-07-04 | 佳木斯大学 | Combined-type electromagnetic multi-path reversal valve |
| CN202746314U (en) * | 2012-08-23 | 2013-02-20 | 淮安市胜杰液压机械有限公司 | Reversing valve two-way hydraulic lock |
| CN203201894U (en) * | 2013-04-18 | 2013-09-18 | 淮安市三联液压科技有限公司 | Combined-type reversing valve for hydraulic locks |
| CN104454722A (en) * | 2014-10-29 | 2015-03-25 | 浙江阿凡特精密设备制造有限公司 | Hydraulic multi-way valve |
| CN105003480A (en) * | 2015-07-20 | 2015-10-28 | 天津市仁德液压机械有限公司 | Multifunctional reversing valve |
| CN205243997U (en) * | 2015-12-18 | 2016-05-18 | 黄培华 | Hydraulic pressure lock speed governing combination switching -over valve |
| CN205533504U (en) * | 2016-04-08 | 2016-08-31 | 青州市昊润机械有限公司 | Take hydraulic pressure multiple directional control valve of hydraulic pressure lock |
-
2016
- 2016-11-08 CN CN201610983361.1A patent/CN106382273A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2661984Y (en) * | 2003-11-14 | 2004-12-08 | 段会强 | Multichannel hydraulic locking reversing valve |
| CN201560992U (en) * | 2009-04-30 | 2010-08-25 | 泸州江阳长江液压科技有限公司 | Pilot-operated hydraulic lock multi-way directional valve set |
| CN202301253U (en) * | 2011-10-24 | 2012-07-04 | 佳木斯大学 | Combined-type electromagnetic multi-path reversal valve |
| CN202746314U (en) * | 2012-08-23 | 2013-02-20 | 淮安市胜杰液压机械有限公司 | Reversing valve two-way hydraulic lock |
| CN203201894U (en) * | 2013-04-18 | 2013-09-18 | 淮安市三联液压科技有限公司 | Combined-type reversing valve for hydraulic locks |
| CN104454722A (en) * | 2014-10-29 | 2015-03-25 | 浙江阿凡特精密设备制造有限公司 | Hydraulic multi-way valve |
| CN105003480A (en) * | 2015-07-20 | 2015-10-28 | 天津市仁德液压机械有限公司 | Multifunctional reversing valve |
| CN205243997U (en) * | 2015-12-18 | 2016-05-18 | 黄培华 | Hydraulic pressure lock speed governing combination switching -over valve |
| CN205533504U (en) * | 2016-04-08 | 2016-08-31 | 青州市昊润机械有限公司 | Take hydraulic pressure multiple directional control valve of hydraulic pressure lock |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108571488A (en) * | 2017-03-13 | 2018-09-25 | 上海融德机电工程设备有限公司 | Pulsed hydraulic pressure divides synchronous valve |
| CN108571488B (en) * | 2017-03-13 | 2024-01-23 | 上海融德机电工程设备有限公司 | Pulse type hydraulic partial pressure synchronous valve |
| CN107218413A (en) * | 2017-07-05 | 2017-09-29 | 圣邦集团有限公司 | A kind of banked direction control valves with hydraulic pressure lock function |
| CN110789509A (en) * | 2019-12-05 | 2020-02-14 | 合肥协力液压科技有限公司 | A mechanical double-chamber balanced brake valve |
| CN117189707A (en) * | 2023-11-06 | 2023-12-08 | 合肥协力液压科技有限公司 | Electromagnetic reversing multi-way valve for paddy field tractor |
| CN119508302A (en) * | 2025-01-20 | 2025-02-25 | 合肥协力液压科技有限公司 | Hydraulic lock core has steel ball seal structure |
| CN119508302B (en) * | 2025-01-20 | 2025-04-11 | 合肥协力液压科技有限公司 | A hydraulic lock with a lock core having a steel ball sealing structure |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170208 |
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| RJ01 | Rejection of invention patent application after publication |