CN106051185B - A kind of balanced valve built in pooling feature - Google Patents
A kind of balanced valve built in pooling feature Download PDFInfo
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- CN106051185B CN106051185B CN201610663569.5A CN201610663569A CN106051185B CN 106051185 B CN106051185 B CN 106051185B CN 201610663569 A CN201610663569 A CN 201610663569A CN 106051185 B CN106051185 B CN 106051185B
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- main valve
- chamber
- elastic component
- groove
- hydraulic fluid
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/52—Means for additional adjustment of the rate of flow
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses the balanced valves built in a kind of pooling feature, including main valve body, main valve plug, the first valve seat, the second valve seat, the first elastic component, the second elastic component and inserting valve body, the fixation of first valve seat is located in main valve body, main valve plug and the first valve seat and main valve body are slidably matched and the inner cavity of main valve body are divided into first chamber, second chamber and control chamber, second valve seat and the second elastic component are each provided in the second chamber, fluid pushes the second valve seat open when V hydraulic fluid port oil inlets, and C hydraulic fluid ports are flowed to through first through hole；First elastic component is mounted in the inserted valve body, inserting valve body is fixedly connected with main valve body, steel ball is crimped onto the runner mouth in the first flow hole in main valve plug by spring base by the first elastic component, when X hydraulic fluid port oil inlets push main valve plug to be moved to the direction of the first elastic component of compression, the fluid of C hydraulic fluid ports can flow to V hydraulic fluid ports by multiple grooves of main valve plug.Balanced valve processing built in a kind of pooling feature is simple and can control surge very well.
Description
Technical field
The present invention relates to control valve technical fields more particularly to one kind capable of accurately controlling load lowering velocity and can be very
The balanced valve of a kind of built-in trimmer valve of control surge well.
Background technology
In the mechanical equipments such as modern engineering machinery, building machinery, raising hydraulic circuit, wherein balanced valve have been widely applied
It is the key that fluid cylinder working Hydraulic Elements in control hoisting circuit, the quality for balancing valve performance directly affects the property of host
Energy.Existing such a disadvantage of hydraulically balanced valve generally existing：When loading decentralization, due to hydraulically balanced valve valve port flow-passing surface
The characteristics of product will produce mutation can make load generate the phenomenon that low-frequency jitter is with impact, cause system unstable, influence complete machine
Security reliability；And during cylinder efficient, since balanced valve timely cannot impact the pressure peak generated by buffer load,
Also hydraulic device is caused great harm.
Patent publication No. is CN103470815B, the patent of invention of entitled " balanced valve " provides a kind of flow-passing surface gradually
The balanced valve of change is combined by milling out groove, aperture and inclined hole that multiple width differ on poppet valve core, reaches flow gradual change
Purpose.But there is also following disadvantages for this design：
(1) when load decentralization and load rise by be same valve port, can all generate restriction effect, and load in practice
Throttling action is not needed when rising, seriously affects the efficiency of operation；A check valve in parallel, nothing are needed in order to solve the problems, such as this also
Expense is increased in shape.
(2) load pressure acts on difference in areas S, and spool overall movement is pushed to overcome spring force, and valve port opening is played
Safe valve action.Since spool matable assembly is more in practical application, and tail portion is equipped with sealing ring, and overall friction is big, spool
Unlatching has certain delay, thus causes the setting pressure that actual pressure peak in system is greater than spring.For example,
The maximum pressure of spring setting is 20MPa, is postponed because spool is opened in practical application, surge pressure can reach 35-
40MPa in this way produces the safety of hydraulic device certain harm.
(3) when loading up and down, safety overflow by be all same valve port, that is, form the spool of this valve port
With valve seat in up and down each time, safety overflow will either on or off it is primary, spool or valve seat can be caused to use in this way
Frequency is excessively high, to shorten service life.
Invention content
It is an object of the invention to overcome the deficiencies of existing technologies, the balanced valve built in a kind of pooling feature is provided, this is flat
Weighing apparatus valve processing is simple, area of passage is without being mutated, accurately control load lowering velocity and can control surge very well.
For the above technical problem, technical solution of the invention is to provide a kind of balance of built-in trimmer valve
Valve, including main valve body, main valve plug, the first valve seat, the second valve seat, the first elastic component, the second elastic component and inserting valve body, described the
The fixation of one valve seat is located in the main valve body, and one end of the main valve plug is actively socketed in first valve seat, the main valve
The other end of core and the inner cavity of the main valve body are slidably matched, and the inner cavity of main valve body is divided into and V by the main valve plug, the first valve seat
First chamber, the second chamber being connected to C hydraulic fluid ports and the control chamber being connected to X hydraulic fluid ports of hydraulic fluid port connection；Second valve seat with
Second elastic component is each provided in the second chamber, and the second valve seat is pressed against and blocked axially on the first valve seat by the second elastic component
The first through hole being located on the first valve seat, fluid pushes second valve seat open when V hydraulic fluid port oil inlets, and C is flowed to through the first through hole
Hydraulic fluid port；First elastic component is mounted in the inserted valve body, the second chamber institute of the inserting valve body and the main valve body
It is fixedly connected at end, described main valve plug one end is equipped with the first flow hole communicated with first chamber, is equipped in the middle part of the main valve plug
It is connected to the second flow channel hole of second chamber and the first flow hole, steel ball is crimped onto by first elastic component by spring base
The runner mouth in the first flow hole in the main valve plug separates first chamber and first flow hole, when steel ball is to compressing the first bullet
Property the movement of part direction when, the fluid of second chamber can flow into first chamber through the first flow hole, second flow channel hole；It is described
Multiple grooves are additionally provided on main valve plug periphery in an axial direction, multiple grooves are arranged to：When X hydraulic fluid port oil inlets push main valve plug to compression
When the direction movement of the first elastic component, the fluid of C hydraulic fluid ports can flow to V hydraulic fluid ports by the multiple groove.
Further, the multiple groove is U-shaped, including the first groove and the second groove, and the depth of the first groove is big
In the depth of the second groove.
Preferably, the distance between first groove and the steel ball are than the distance between the second groove and the steel ball
Greatly, the width of first groove is more than the width of second groove.
Preferably, first groove and second groove include multiple, and multiple first grooves and/or second recessed
Slot is sequentially arranged around main valve plug circumferential surface, along the axis of the main valve plug.
Further, the second chamber is equipped with spring groove, second elasticity close to the side of the control chamber
One end of part is connected in the spring groove, and second elastic component is actively socketed on the main valve plug and the other end supports
It is connected on second valve seat.
Preferably, the internal diameter of second elastic component is more than the diameter of the main valve plug corresponding position, second valve seat
It is actively socketed on the main valve plug and the diameter of second valve seat is less than the diameter of the second chamber.
Further, the main valve plug is equipped with convex shoulder close to one end of steel ball, in V hydraulic fluid port oil inlets, first elasticity
The convex shoulder of the main valve plug is crimped on first valve seat by part, the first flow hole of the first chamber and the main valve plug
Between separated by the steel ball.
Beneficial effects of the present invention are as follows：
The present invention completes one-way function and a master for throttling by the way that second valve seat is arranged in a valve body
Spool, and by way of opening up multiple grooves on main valve plug, the movement of control bound core can be controlled relatively accurately
Flow area so that do not limited by throttling when hydraulic cylinder rises, when hydraulic cylinder declines by than shallower throttling control.This
Outside, by steel ball can also fast cache fall surge, impact can be controlled very well.When by different operating modes, the second valve is realized
The asynchronous unlatching of seat, main valve plug and steel ball, reduces the damage of parts, can extend the whole service life of the present invention.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly introduced.It should be evident that drawings discussed below is only some embodiments of the present invention, for ability
For the those of ordinary skill in domain, without creative efforts, others are can also be obtained according to these attached drawings
Attached drawing.
It is a kind of structural schematic diagram of embodiment of the balanced valve built in a kind of pooling feature of the present invention shown in Fig. 1；
It is a kind of structural schematic diagram of the main valve plug in Fig. 1 shown in Fig. 2；
It is the principle schematic of the balanced valve built in a kind of pooling feature of the present invention shown in Fig. 3；
It is the principle schematic of the hydraulic circuit of the balanced valve built in a kind of pooling feature using the present invention shown in Fig. 4.
In figure：1, the first elastic component, 2, inserting valve body, 3, spring base, the 4, first valve seat, the 5, second valve seat, 6, main valve plug,
61, the second groove, the 62, first groove, 63, first flow hole, 64, second flow channel hole, the 7, second elastic component, 8, main valve body, 9,
Steel ball, 10, second chamber, 11, first chamber, 12, first through hole, 13, control chamber.
Specific implementation mode
Understand to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention
Exemplary embodiment be described in further detail.Obviously, described embodiment is only that the part of the present invention is implemented
Example, rather than the exhaustion of all embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making wound
The all other embodiment obtained under the premise of the property made labour, falls in the scope of protection of the invention.
As shown in Figure 1, giving a kind of specific embodiment of the balanced valve built in a kind of pooling feature of the present invention.At this
In embodiment, a kind of balanced valve of built-in trimmer valve of the invention includes mainly main valve body 8, main valve plug 6, the first valve seat 4, second
Valve seat 5, the first elastic component 1, the second elastic component 7 and inserting valve body 2.The fixation of first valve seat 4 is located in main valve body 8, main valve plug 6
One end is actively socketed in the first valve seat 4, and the other end (i.e. downside small end in Fig. 1) of main valve plug 6 is slided with the inner cavity of main valve body 8
Dynamic cooperation.The inner cavity of main valve body 8 is divided into three parts by main valve plug 6 and the first valve seat 4 jointly：First chamber 11, second chamber 10
Control chamber 13.Wherein, first chamber 11 is connected to V hydraulic fluid ports, and second chamber 10 is connected to C hydraulic fluid ports, and control chamber 13 connects with X hydraulic fluid ports
It is logical.
In addition, the second valve seat 5 and the second elastic component 7 are each provided in second chamber 10.First valve seat 4 is equipped with axial the
One through-hole 12, in V hydraulic fluid port oil inlets, the oil liquid pressure into first through hole 12 can push the second valve seat 5 open, so that V hydraulic fluid ports
Fluid through first through hole 12 enter C hydraulic fluid ports.In V hydraulic fluid port not oil inlets, under the action of the second elastic component 7, the second valve seat 5 pressure
It comes on the first valve seat 4, blocks first through hole 12, separate first chamber 11 and second chamber 10.
In addition, the first elastic component 1 is mounted in inserting valve body 2.Insert valve body 2 and end where the second chamber of main valve body 8
It is fixedly connected.6 one end of main valve plug is equipped with the first flow hole 63 that is communicated with first chamber 11, and 6 middle part of main valve plug is equipped with connection the
Steel ball 9 is crimped onto main valve by the second flow channel hole 64 of two chambers 10 and first flow hole 63, the first elastic component 1 by spring base 3
The runner mouth in the first flow hole 63 in core 6 separates first chamber 11 and first flow hole 63, when steel ball 9 is to compressing the first bullet
Property the movement of part direction when, the fluid of second chamber 10 can flow into first chamber 11 through first flow hole 63, second flow channel hole 64；
Multiple grooves are additionally provided on the periphery of main valve plug 6 in an axial direction, multiple grooves are arranged to：When X hydraulic fluid port oil inlets push main valve plug to
When compressing the direction movement of the first elastic component 1, the fluid of C hydraulic fluid ports can flow to V hydraulic fluid ports by the multiple groove
A kind of concrete structure of main valve plug 6 as shown in Figure 2.In fig. 2, multiple grooves are U-shaped, including the first groove 62
With the second groove 61, and the depth of the first groove 62 be more than the second groove 61 depth.Multiple grooves are arranged to have an advantage that, when
The pressure of X hydraulic fluid ports increases, when main valve plug 6 increases to the distance in the direction of the first elastic component 1 of compression, more and more groove dew
Go out, flowing to V hydraulic fluid ports flow stream velocity by groove gently increases.
In a preferred embodiment, the distance between the first groove 62 and steel ball 9 than the second groove 61 and steel ball 9 it
Between distance it is big.The width of first groove 62 is more than the width of the second groove 61.This structure is advantageous in that, when X hydraulic fluid ports
Pressure increased more, and the displacement that main valve plug 6 compresses the first elastic component 1 is longer, and it is bigger to flow to V hydraulic fluid port flows by groove, from
And be conducive to accurate flow control.
In a preferred embodiment, the first groove 62 and the second groove 61 include multiple, and multiple first grooves
62 and/or second groove 61 be sequentially arranged around main valve plug 6 circumferential surface, along the axis of main valve plug 6.Multiple second grooves 61 lean on
The start line of nearly first chamber, is equally spaced around main valve plug 6 along the axis of main valve plug 6 from the top down.Similarly, it is possible to understand that
It is that the start line of multiple first grooves 62 is not also on the same section of main valve plug 6, and around main valve plug 6 along main valve plug 6
Axis be equally spaced from the top down.
In one embodiment, as shown in Figure 1, second chamber 10 is equipped with spring groove close to the side of control chamber 13,
One end of second elastic component 7 is connected in spring groove, and the second elastic component 7 is actively socketed on main valve plug 6 and the other end supports
It is connected on the second valve seat 5.
In a preferred embodiment, the internal diameter of the second elastic component 7 is more than the diameter of 6 corresponding position of main valve plug, i.e., the
Only there is active force to the second valve seat 5 between two elastic components 7 and main valve plug 6 almost without active force, the second elastic component 7.In addition, the
Two valve seats 5 are actively socketed on main valve plug 6 and the diameter of the second valve seat 5 is less than the diameter of second chamber 10, i.e. the second valve seat 5 with
Substantially without active force between the inner wall of second chamber 10, the active force of the second valve seat 5 is only dependent upon the second elastic component 7 and first
Oil liquid pressure in through-hole 12.
In one embodiment, main valve plug 6 is equipped with convex shoulder close to one end of steel ball 9, in V hydraulic fluid port oil inlets, the first elasticity
The convex shoulder of main valve plug 6 is crimped on the first valve seat 4 by part 1, since multiple through-holes on main valve plug 6 are blocked by the first valve seat 4,
Thus the channel between first chamber 11 and the first flow hole 63 of main valve plug 6 is separated by steel ball 9.
The principle schematic for the balanced valve built in pooling feature for showing the present invention such as Fig. 3.As can be seen from FIG. 3, when V oil
When mouth oil inlet, C hydraulic fluid ports can be flowed to by opening the one-way valve structures that the second valve seat 5 is formed.When X hydraulic fluid port oil inlets, the oil of C hydraulic fluid ports
Liquid can gently flow to V hydraulic fluid ports by adjustable throttle-valve structure on right side and lay down.When outer force effect generates load shock power
When, it can form the overflow valve as shown in left side by the unlatching of steel ball 9 and quickly lay down pressure.
As Fig. 4 show using it is shown in Fig. 3 the present invention it is a kind of built in trimmer valve balanced valve hydraulic circuit knot
Structure schematic diagram.Wherein, the rodless cavity of C hydraulic fluid ports connection liquid cylinder pressure, V hydraulic fluid ports connect reversal valve.According to Fig. 4, the work of the hydraulic return
Work is divided into rising, stopping, declining these three processes, and concrete operating principle is as follows：
(1) uphill process.The pressure oil of reversal valve reaches the V hydraulic fluid ports of balanced valve, and the pressure oil of V hydraulic fluid ports pushes the second valve seat
5 open, and fluid flows into C hydraulic fluid ports through V hydraulic fluid ports and reaches hydraulic cylinder rodless cavity, pushes hydraulic cylinder uplink.This stage fluid is by V hydraulic fluid port streams
Enter C hydraulic fluid ports without throttling action.
(2) decline process.The pressure oil of X hydraulic fluid ports is applied on main valve plug 6, is overcome the pretightning force of the first elastic component 1, is made master
Spool 6 moves up, and first opens the conical surface seal face between main valve plug 6 and the first valve seat 4.When X hydraulic fluid port pressure increases, main valve plug 6 is just
It moves up further, each groove (i.e. the first groove 62 in Fig. 2 covered in by the diameter of the first valve seat 4 before gradually exposing
With the second groove 61), such area of passage, which mitigates, to be increased, and load lowering velocity can be precisely controlled.And due to overcurrent
The gradual change of area realizes that processing cost is low by drilling gradually communication.
(3) stopped process.X hydraulic fluid port pressure reductions, the first elastic component 1 push main valve plug 6 to move to left, and area of passage gradually contracts
It is small, until main valve plug 6 is fitted in completely on the first valve seat 4, valve port is shut completely.
(4) buffering course.In oil cylinder quiescing process, external force or it is other due to cause C mouthfuls of pressure to steeply rise, C
The hydraulic oil of mouth flows into first flow hole 63 by second flow channel hole 64, is applied on steel ball 9, overcomes the pre- of the first elastic component 1
Clamp force flows into V mouthfuls, turns off at once after pressure peak is buffered.Since steel ball 9 is without other matable assemblies, rapid nothing is opened
Delay, can be very good to play the role of safeguard protection.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.It will additionally be appreciated that as long as there is no in structure
Conflict, the feature in each embodiment can be combined with each other, be formed by combined type feature and still fall within the scope of the present invention
It is interior.The invention is not limited in specific embodiments disclosed herein, but include all skills fallen within the scope of the appended claims
Art scheme.
Claims (7)
1. the balanced valve built in a kind of pooling feature, which is characterized in that including main valve body, main valve plug, the first valve seat, the second valve
Seat, the first elastic component, the second elastic component and inserting valve body, the first valve seat fixation are located in the main valve body, the main valve
One end of core is actively socketed in first valve seat, and the other end of the main valve plug and the inner cavity sliding of the main valve body are matched
Close, the inner cavity of main valve body is divided into the first chamber being connected to V hydraulic fluid ports by the main valve plug, the first valve seat, be connected to C hydraulic fluid ports the
Two chambers and the control chamber being connected to X hydraulic fluid ports；Second valve seat and the second elastic component are each provided in the second chamber, and the
Second valve seat is pressed against the first through hole for blocking and being axially disposed on the first valve seat on the first valve seat, V hydraulic fluid port oil inlets by two elastic components
When fluid push second valve seat open, flow to C hydraulic fluid ports through the first through hole；First elastic component is mounted on the inserted valve
In vivo, the inserting valve body is fixedly connected with end where the second chamber of the main valve body；Described main valve plug one end is equipped with and the
The first flow hole that one chamber communicates, the main valve plug middle part are equipped with the second of connection second chamber and the first flow hole
Steel ball is crimped onto the runner mouth in the first flow hole in the main valve plug by spring base by road hole, first elastic component, every
Disconnected first chamber and first flow hole, when steel ball is moved to the first elastic component direction of compression, the fluid of second chamber can be through
The first flow hole, second flow channel hole flow into first chamber；It is additionally provided with multiple grooves in an axial direction on the main valve plug periphery,
Multiple grooves are arranged to：When X hydraulic fluid port oil inlets push main valve plug to be moved to the direction of the first elastic component of compression, the fluid of C hydraulic fluid ports
V hydraulic fluid ports can be flowed to by the multiple groove.
2. the balanced valve built in a kind of pooling feature as described in claim 1, which is characterized in that the multiple groove be it is U-shaped,
Including the first groove and the second groove, and the depth of the first groove is more than the depth of the second groove.
3. the balanced valve built in a kind of pooling feature as claimed in claim 2, which is characterized in that first groove with it is described
The distance between steel ball is bigger than the distance between the second groove and the steel ball, and the width of first groove is more than described second
The width of groove.
4. the balanced valve built in a kind of pooling feature as claimed in claim 3, which is characterized in that first groove with it is described
Second groove includes multiple, and multiple first grooves and/or the second groove are around main valve plug circumferential surface, along the main valve plug
Axis is sequentially arranged.
5. the balanced valve built in a kind of pooling feature as described in claim 1, which is characterized in that the second chamber is close to institute
The side for stating control chamber is equipped with spring groove, and one end of second elastic component is connected in the spring groove, described
Second elastic component is actively socketed on the main valve plug and the other end is connected on second valve seat.
6. the balanced valve built in a kind of pooling feature as claimed in claim 5, which is characterized in that second elastic component it is interior
Diameter is more than the diameter of the main valve plug corresponding position, and second valve seat is actively socketed on the main valve plug and second valve
The diameter of seat is less than the diameter of the second chamber.
7. such as the balanced valve built in a kind of pooling feature according to any one of claims 1 to 6, which is characterized in that the master
Spool is equipped with convex shoulder close to one end of steel ball, and in V hydraulic fluid port oil inlets, first elastic component crimps the convex shoulder of the main valve plug
On first valve seat, separated by the steel ball between the first flow hole of the first chamber and the main valve plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610663569.5A CN106051185B (en) | 2016-08-13 | 2016-08-13 | A kind of balanced valve built in pooling feature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610663569.5A CN106051185B (en) | 2016-08-13 | 2016-08-13 | A kind of balanced valve built in pooling feature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106051185A CN106051185A (en) | 2016-10-26 |
| CN106051185B true CN106051185B (en) | 2018-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610663569.5A Active CN106051185B (en) | 2016-08-13 | 2016-08-13 | A kind of balanced valve built in pooling feature |
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| CN (1) | CN106051185B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167491B (en) * | 2017-12-25 | 2019-08-13 | 良名阀门科技有限公司 | A kind of No leakage three-way pressure reducing valve |
| CN108150684B (en) * | 2017-12-25 | 2021-06-15 | 佛山市中锐达精工科技有限公司 | Two-way pressure reducing valve |
| CN109099023B (en) * | 2018-09-29 | 2020-08-21 | 艾肯（江苏）工业技术有限公司 | Balance valve |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8503160U1 (en) * | 1985-02-06 | 1985-10-10 | GAT Grubenausbau GmbH, 5840 Schwerte | Pressure relief valve with an O-ring with a small cord thickness |
| DE3510462A1 (en) * | 1985-03-22 | 1986-10-02 | Jörn 4320 Hattingen Dams | Pressure relief valve with a sealed spring space |
| DE4129799A1 (en) * | 1991-09-09 | 1993-03-11 | Quante Heinrich Berg Ing | Pressure limiting valve for hydraulic jacks in mine - has simple set and release mechanism and non-return valve all integral with jack |
| DK174004B1 (en) * | 2000-02-04 | 2002-04-08 | Korsnaes Bates As | Gas overpressure protection |
| DE102004005745A1 (en) * | 2004-02-05 | 2005-08-25 | Voß, Christina | Pressure relief valve with direct hydraulic damping |
| CN103470815B (en) * | 2013-09-30 | 2015-08-26 | 常德中联重科液压有限公司 | Equilibrium valve |
-
2016
- 2016-08-13 CN CN201610663569.5A patent/CN106051185B/en active Active
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| CN106051185A (en) | 2016-10-26 |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20180809 Address after: 325000 Zhoushan Road, Dongou Industrial Zone, Oubei new urban area, Yongjia, Wenzhou, Zhejiang Applicant after: LIXIN VALVE GROUP CO.,LTD. Address before: 315040 -1 408, room 265, Huang Li new village, Baihe street, Jiangdong District, Ningbo, Zhejiang, China, 408 Applicant before: Li Jun |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A built-in balance valve with buffering function Effective date of registration: 20230620 Granted publication date: 20180928 Pledgee: Agricultural Bank of China Limited Yongjia County sub branch Pledgor: LIXIN VALVE GROUP CO.,LTD. Registration number: Y2023330001238 |
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