CN107975508A - Orifice valve - Google Patents
Orifice valve Download PDFInfo
- Publication number
- CN107975508A CN107975508A CN201711193595.7A CN201711193595A CN107975508A CN 107975508 A CN107975508 A CN 107975508A CN 201711193595 A CN201711193595 A CN 201711193595A CN 107975508 A CN107975508 A CN 107975508A
- Authority
- CN
- China
- Prior art keywords
- mouthfuls
- spool
- valve
- swivel nut
- mouth
- 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
- F15B13/026—Pressure compensating valves
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Safety Valves (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a kind of orifice valve, including valve body, spool, spring and swivel nut, valve body lower portion opens up A mouthfuls, and swivel nut top offers B mouthfuls, and swivel nut is fixedly connected with valve body screw thread；The spool and spring are arranged in swivel nut inner cavity, and the spring upper end is against at the ladder of swivel nut inner cavity, and lower end is against on spool, spool lower end is kept stretching into A mouthfuls of trend, spool lower end and the valve A mouth are clearance fit；When fluid flows to B mouthfuls by A mouthfuls, the spool lower end can progressively move up, and reduce the length with the valve A mouth clearance fit, and A mouthfuls of fluid flow into B mouthfuls through the gap between the spool and valve A mouth；When fluid flows into A mouthfuls by B mouthfuls, spool lower end is all stretched into A mouthfuls, and fluid flows into A mouthfuls by B mouthfuls through the gap between the spool and valve A mouth.Orifice valve processing is simple and can effectively buffer load sensitive pressure fluctuate.
Description
Technical field
The present invention relates to control valve manufacturing technology field, and especially a kind of orifice valve, refers specifically to a kind of for wheeled
Orifice valve in the engineering machinery load sensory system such as loading machine, crane, mini-excavator.
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 orifice valve of buffer load sensitive pressure fluctuation.
Technical solution is used by the present invention solves above-mentioned technical problem：
A kind of orifice valve, including valve body, spool, spring and swivel nut are provided, the valve body lower portion opens up A mouthfuls, the valve body
It is internally provided with and the A mouthfuls of inner cavities communicated；The swivel nut top offers B mouthfuls, and the swivel nut is internally provided with and the B mouthfuls of ladders communicated
Inner cavity, the swivel nut are fixedly connected with the valve body screw thread；The spool and spring are arranged in the swivel nut inner cavity, the bullet
Spring upper end is against at the ladder of the valve pocket inner cavity, lower end is against on the spool, spool lower end is kept stretching into A mouthfuls and
Gesture, the spool lower end and the valve A mouth are clearance fit；When fluid flows to B mouthfuls by A mouthfuls, the spool lower end can be by
Step moves up, reduce with the length of the valve A mouth clearance fit, A mouthfuls of fluid are through between the spool and valve A mouth
Clearance flow enters B mouthfuls；When fluid flows into A mouthfuls by B mouthfuls, spool lower end is all stretched into A mouthfuls, and fluid is by B mouthfuls through the spool and valve
Gap between A mouthfuls of body flows into A mouthfuls.
Further, the spool lower end is from top to bottom disposed with the first cylinder, the conical surface and the second cylinder, and described
One cylinder and the valve A mouth are clearance fit, are equipped with annular retaining ring in the middle part of the spool, the annular retaining ring hypomere is provided with logical
Chute.
Preferably, it is provided with sealing ring in the middle part of the valve body periphery.
Beneficial effects of the present invention are as follows：
By setting spool and A mouthfuls of clearance fits in the present invention, when realizing that fluid flows to B mouthfuls by A mouthfuls, spool lower end can be by
Step moves up the length reduced with the valve A mouth clearance fit according to the magnitude of pressure differential between A mouthfuls and B mouthfuls, because gap
Coordinate Distance Shortened, damping progressively reduces, and A mouthfuls of fluid flow into B mouthfuls by the gap between spool and valve A mouth；When fluid is by B mouthfuls
When flowing into A mouthfuls, spool lower end is all stretched into A mouthfuls, clearance fit distance, and damping is big, and fluid is by B mouthfuls through the spool and valve
Gap between A mouthfuls of body flows into A mouthfuls.It can so realize that fluid flows into A mouthfuls of dampings greatly by B mouthfuls, and by B mouthfuls of bases of A mouthfuls of inflows
Both magnitude of pressure differential automatic damping adjusting sizes, effectively buffering fall load-sensitive pressure oscillation and do not influence response speed and
It is compact-sized.
Brief 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, it can also be obtained according to these attached drawings other
Attached drawing.
It is a kind of structure diagram of embodiment of orifice valve of the present invention shown in Fig. 1；
It is the structure diagram of the spool of orifice valve of the present invention shown in Fig. 2；
It is the principle schematic of orifice valve of the present invention shown in Fig. 3；
It is the principle schematic of the hydraulic circuit of orifice valve using the present invention shown in Fig. 4；
Fig. 5 is the pressure damping effect figure of the present invention.
In figure：1st, swivel nut, 2, spring, 3, valve body, 4, spool, the 41, first cylinder, 42, the conical surface, the 43, second cylinder, 44,
Annular retaining ring, 441, through-flow groove.
Embodiment
In order to which the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with attached drawing to the present invention
Exemplary embodiment be described in further detail.Obviously, described embodiment is only the part implementation of the present invention
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 work, falls within the scope of protection of the invention.
As shown in Figure 1, give a kind of specific embodiment of the orifice valve of the present invention.In this embodiment, it is of the invention
Orifice valve mainly includes valve body 3, spool 4, spring 2 and swivel nut 1, and 3 lower part of valve body opens up A mouthfuls, and valve body 3 is internally provided with and A mouthfuls of phases
Logical inner cavity.1 top of swivel nut offers B mouthfuls, swivel nut 1 be internally provided with the B mouthfuls of step inner cavities communicated, swivel nut 1 and valve body 3 are spiral shell
Line is fixedly connected；Spool 4 and spring 2 are arranged in the inner cavity of swivel nut 1, and 2 upper end of spring is against at the ladder of 1 inner cavity of swivel nut, under
End is against on spool 4,4 lower end of spool is kept stretching into A mouthfuls of trend, 4 lower end of spool and the A mouths of valve body 3 are clearance fit.When
When fluid flows to B mouthfuls by A mouthfuls, 4 lower end of spool can progressively move up, reduction and the length of the A mouth clearance fits of valve body 3, A mouthfuls
Fluid flows into B mouthfuls through the gap between 4 lower end of spool and valve A mouth；When fluid flows into A mouthfuls by B mouthfuls, 4 lower end of spool is whole
Stretch into A mouthfuls, fluid flows into A mouthfuls by B mouthfuls through the gap between spool 4 and valve A mouth.
In a preferred embodiment, as shown in Fig. 2, 4 lower end of spool be from top to bottom disposed with the first cylinder 41,
The A mouths of 42 and second cylinder 43 of the conical surface, the first cylinder 41 and valve body 3 are clearance fit, and the middle part of spool 4 is equipped with annular retaining ring 44,
44 hypomere of annular retaining ring is provided with through-flow groove 441.By setting 42 and second cylinder 43 of the conical surface to ensure A mouthfuls in 4 lower end of spool
And between B mouthfuls when pressure difference is larger, the first cylinder 41 gradually stretches out A mouthfuls, is gradually reduced damping action, passes through the conical surface 42 and second
The area of passage bigger of cylinder 43, it is possible to achieve quick response.Through-flow groove 441 is set, it can be ensured that fluid flows into A mouthfuls by B mouthfuls
When, annular retaining ring 44 will not block A mouthfuls, influence flow control.
In one embodiment, as shown in Figure 1, being provided with sealing ring in the middle part of 3 periphery of valve body, A mouthfuls and B causes for gossip now may be used
The sealing leaned on, fluid can only pass in and out A mouthfuls and B mouthfuls by spool 4.
As Fig. 3 shows the principle schematic of the orifice valve of the present invention.According to Fig. 1,2,3, when fluid is by A mouthfuls of flow directions
At B mouthfuls, 4 lower end of spool can progressively move up, and reduce the first cylinder 41 and the length of the A mouth clearance fits of valve body 3, A mouthfuls of oil
Gap between the first cylinder 41 and valve A mouth of the liquid through spool 4 flows into B mouthfuls, and the pressure difference between A mouthfuls and B mouthfuls is bigger, then and first
The distance that cylinder 41 moves up is longer, and the damping of the first cylinder 41 and A mouthfuls of fit clearance is smaller.When fluid is by B mouthfuls of inflow A
During mouth, the first cylinder 41 is all stretched into A mouthfuls, and fluid flows into A mouthfuls by B mouthfuls through the gap between spool 4 and valve A mouth, at this moment
Wait the first cylinder 41 and the damping in A mouthfuls of gap is maximum.
Operation principle：
As shown in figure 4, this damping control valve is applied in quantitative load sensitive system, coordinate hydraulic pump 5, throttle valve 6 with
And the fluctuation of 7 buffer load sensitive pressure of two-way pressure compensator, the load-sensitive chamber that A mouthfuls of orifice valve connects two-way pressure compensator 7,
The outlet that the B mouths of orifice valve are connected on throttle valve is connected with load pressure.
When B mouthfuls of pressure fluctuate, as shown in figure 5, solid line represents B mouthfuls of pressure, dotted line represents A mouthfuls of pressure, B mouthfuls of pressure
There is continuous wave crest, trough in fluctuation value；When B mouthfuls of pressure oscillations are to trough, the pressure differential between A mouthfuls and B mouthfuls is smaller
When, movable valve plug 4, the first cylinder 41 are not fully inserted into A mouthfuls on A mouthfuls of pressure tops, and the first cylinder 41 and the damping of A mouthfuls of gap are maximum,
Therefore A mouthfuls of pressure decline and can be delayed, and so when A mouthfuls of pressure do not reach B mouthfuls of trough also, B mouthfuls of pressure has been fluctuated to ripple
Peak, at this time, B mouthfuls of fluid flow into A mouthfuls through the gap between the first cylinder 41 and A mouthfuls, and damping is very strong, makes A mouthfuls of pressure
Power regional stability.So just realize, in B mouthfuls of pressure oscillations, A mouthfuls of pressure value stabilization is simply in B mouthfuls of pressure oscillations
Between peaks and troughs, then the valve port of two-way pressure compensator 7 is also at stable state, and valve port will not be suddenly big or suddenly small, because not
Vibration can be produced.
When quantitative load sensitive system load reduction value is very big, B mouthfuls of pressure oscillations to trough make the pressure between A mouthfuls and B mouthfuls
When difference is larger, A mouthfuls of pressure, which are acted on spool 4, overcomes the active force of spring 2 to promote spool 4 to move up the first cylinder 41 of reduction
With the length of A mouthfuls of clearance fits, damping action is reduced；Two-way pressure compensator 7 needs standard-sized sheet, then A mouthfuls with B mouthfuls of pressure difference very
Greatly, expose A mouthfuls of upper end to the conical surface 42 directly by the upward top of spool 4, realize quick backflow, can so realize that two-way pressure is mended
Repay the quick closedown of device 7.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then can make these embodiments other change and modification.So appended claims be intended to be construed to include it is excellent
Select embodiment and fall 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, and the combined type feature formed still falls within the scope of the present invention
It is interior.The invention is not limited in specific embodiment disclosed herein, but all skills including falling within the scope of the appended claims
Art scheme.
Claims (3)
1. a kind of orifice valve, including valve body, spool, spring and swivel nut, it is characterised in that the valve body lower portion opens up A mouthfuls, described
Valve inner is equipped with and the A mouthfuls of inner cavities communicated；The swivel nut top offers B mouthfuls, and the swivel nut is internally provided with what is communicated with B mouthfuls
Step inner cavity, the swivel nut are fixedly connected with the valve body screw thread；The spool and spring are arranged in the swivel nut inner cavity, institute
State spring upper end to be against at the ladder of the swivel nut inner cavity, lower end is against on the spool, makes spool lower end keep stretching into A mouthfuls
Trend, the spool lower end and the valve A mouth are clearance fit；When fluid flows to B mouthfuls by A mouthfuls, spool lower end meeting
Progressively move up, reduce the length with the valve A mouth clearance fit, A mouthfuls of fluid are through between the spool and valve A mouth
Gap flows into B mouthfuls；When fluid flows into A mouthful by B mouthfuls, spool lower end is all stretched into A mouthfuls, fluid by B mouthfuls through the spool and
Gap between valve A mouth flows into A mouthfuls.
2. orifice valve as claimed in claim 1, it is characterised in that the spool lower end is from top to bottom disposed with the first circle
Column, the conical surface and the second cylinder, first cylinder and the valve A mouth are clearance fit, and annular gear is equipped with the middle part of the spool
Circle, the annular retaining ring hypomere are provided with through-flow groove.
3. orifice valve as claimed in claim 1, it is characterised in that be provided with sealing ring in the middle part of the valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711193595.7A CN107975508B (en) | 2017-11-24 | 2017-11-24 | Damping valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711193595.7A CN107975508B (en) | 2017-11-24 | 2017-11-24 | Damping valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107975508A true CN107975508A (en) | 2018-05-01 |
| CN107975508B CN107975508B (en) | 2020-06-12 |
Family
ID=62011499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711193595.7A Active CN107975508B (en) | 2017-11-24 | 2017-11-24 | Damping valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107975508B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111140619A (en) * | 2020-01-03 | 2020-05-12 | 北京强度环境研究所 | Damping valve of hydraulic shock absorber and hydraulic shock absorber |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2876358Y (en) * | 2005-11-28 | 2007-03-07 | 潍柴动力股份有限公司 | Oil outlet valve used on diesel oil engine oil spray pump |
| 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 |
| CN204942128U (en) * | 2015-06-25 | 2016-01-06 | 徐州重型机械有限公司 | A kind of bidirectional damper valve arrangement |
| CN107061402A (en) * | 2017-05-26 | 2017-08-18 | 湖南凯恩利液压机械制造有限公司 | A kind of hydraulic control load holding valve, hydraulic system and plant equipment |
-
2017
- 2017-11-24 CN CN201711193595.7A patent/CN107975508B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2876358Y (en) * | 2005-11-28 | 2007-03-07 | 潍柴动力股份有限公司 | Oil outlet valve used on diesel oil engine oil spray pump |
| 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 |
| CN204942128U (en) * | 2015-06-25 | 2016-01-06 | 徐州重型机械有限公司 | A kind of bidirectional damper valve arrangement |
| CN107061402A (en) * | 2017-05-26 | 2017-08-18 | 湖南凯恩利液压机械制造有限公司 | A kind of hydraulic control load holding valve, hydraulic system and plant equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111140619A (en) * | 2020-01-03 | 2020-05-12 | 北京强度环境研究所 | Damping valve of hydraulic shock absorber and hydraulic shock absorber |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107975508B (en) | 2020-06-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101749447B (en) | Flow control valve | |
| CN203641148U (en) | Balance valve and hydraulic cylinder telescopic control loop | |
| CN201306458Y (en) | Flow control valve and hydraulic control system | |
| CN102996556A (en) | Direct-acting type hydraulic threaded cartridge balanced valve | |
| CN107939766A (en) | A kind of oil supplementation buffer valve | |
| CN108180299A (en) | A kind of one-way flow valves | |
| CN103738396A (en) | Constant flow steering system and engineering machinery | |
| CN108223493A (en) | A kind of variable balanced valve of pilot ratio | |
| CN107975508A (en) | Orifice valve | |
| CN108061070A (en) | A kind of pressure-control valve | |
| CN202971371U (en) | Directly-operated type hydraulic screw-in balance valve | |
| CN207093482U (en) | Ioad-sensing control valve and load sensitive control system | |
| CN108775431A (en) | Balanced valve | |
| CN105402449B (en) | Hydraulic control one-way valve | |
| CN106438549A (en) | Direct-acting overflow valve | |
| CN106382269A (en) | Combination valve with speed governing, reversing and overflow functions | |
| CN108150472B (en) | A kind of buffer overflow valve | |
| CN207246548U (en) | A kind of through-type combined liquid pressure damping element | |
| CN103697005B (en) | A kind of control loop of single-action hydraulic cylinder | |
| CN107762998B (en) | Load-sensitive pressure filters valve | |
| CN104235098B (en) | Fluid pressure valve device | |
| CN107165879B (en) | A kind of flow prior control loop | |
| CN110422778B (en) | Boom amplitude-changing hydraulic system and crane | |
| CN203627377U (en) | Hydraulic valve device | |
| CN108131346B (en) | A kind of threeway one-way speed-regulating valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200521 Address after: Room C38-202, No. 5, Xijing Road, Ouhai Economic Development Zone, Wenzhou City, Zhejiang Province, 325000 Applicant after: WENZHOU HANXUANLIN INDUSTRIAL DESIGN Co.,Ltd. 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. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201225 Address after: 224400 Sanzao Industrial Park 99 (E), Funing County, Yancheng City, Jiangsu Province Patentee after: Jiangsu Zhongni Machinery Technology Co.,Ltd. Address before: Room c38-202, No.5 Xijing 1st Road, Ouhai Economic Development Zone, Wenzhou, Zhejiang 325000 Patentee before: WENZHOU HANXUANLIN INDUSTRIAL DESIGN Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Damping valve Effective date of registration: 20210827 Granted publication date: 20200612 Pledgee: Bank of Jiangsu Co.,Ltd. Yancheng branch Pledgor: Jiangsu Zhongni Machinery Technology Co.,Ltd. Registration number: Y2021980008505 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |