CN107255185B - A kind of unloading valve mechanical pilot valves - Google Patents
A kind of unloading valve mechanical pilot valves Download PDFInfo
- Publication number
- CN107255185B CN107255185B CN201710368189.3A CN201710368189A CN107255185B CN 107255185 B CN107255185 B CN 107255185B CN 201710368189 A CN201710368189 A CN 201710368189A CN 107255185 B CN107255185 B CN 107255185B
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- China
- Prior art keywords
- hydraulic cavities
- pressure
- hydraulic
- valve
- spool
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- 230000008878 coupling Effects 0.000 claims abstract description 7
- 238000010168 coupling process Methods 0.000 claims abstract description 7
- 238000005859 coupling reaction Methods 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims 1
- 239000000839 emulsion Substances 0.000 abstract description 6
- 210000003746 feather Anatomy 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
Classifications
-
- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
- F16K31/38—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Driven Valves (AREA)
Abstract
A kind of unloading valve mechanical pilot valves, including guide valve blocks are provided with system pressure mouth, oil supply pressure mouth and return hydraulic coupling mouth on the guide valve blocks；It include spool and valve seat in the guide valve blocks, the shell of the spool, valve seat and guide valve blocks constitutes the first hydraulic cavities I, and the first hydraulic cavities I is connected with the oil supply pressure mouth；Include swivel nut in the guide valve blocks, control mandril is installed in the swivel nut；The control mandril and the swivel nut constitute the second hydraulic cavities II, and the two the first hydraulic cavities II is connected with the system pressure mouth；The control mandril and the spool are positioned opposite, and the region between the control mandril and the spool constitutes third hydraulic cavities III, and the third hydraulic cavities III is connected with the return hydraulic coupling mouth.The configuration of the present invention is simple, using mechanical structure, failure rate is low, good seal performance, is particularly suitable for underground emulsion environment.
Description
Technical field
The present invention relates to a kind of mechanical pilot valves more particularly to a kind of unloading valve for underground emulsion to use mechanical guide
Valve.
Background technique
It in hydraulic system, is adjusted and controls for the output pressure to hydraulic pump, usually there are three types of modes for tool: overflow
Control, overflow unloading control and Ioad-sensing control, and main and pilot structure are taken mostly.Overflow unloading control it is basic
Thought is: unloading valve is configured in hydraulic system, when system pressure reaches setting pressure, hydraulic power source automatic deloading reduces energy
Consumption；When system pressure is reduced to a certain range, under the control of unloading valve, hydraulic power source Automatic-boosting is until system pressure reaches
Set pressure.
In practical applications, the reaction speed of system can be improved using pilot valve control unloading valve, therefore with pilot valve
Unloading valve be it is very common, difference is that the structure and installation site of guide structure.
2011200222507 disclose a kind of unloading valve pilot mechanism；In this scenario, pilot section has for tail portion and leads
To the structure of relief valve of column, after system pressure reaches setting value, overflow valve is opened, the damping hole of cooperation unloading valve core position setting
Realize Automatic-boosting, the unloading function of hydraulic power source, but according to its design feature, the setting of pressurization-off-load range passes through overflow valve
Matching with off-load spool damping hole is realized, not enough intuitively, is difficult to calculate determination；There is unloading valve core segment in pilot section
Rely on, be difficult to come as an independent functional unit using.
2010101797215 disclose a kind of electromagnetic unloading valve of emulsion pump, wherein including a pilot valve: system pressure
It after power reaches setting value, is first turned on by the overflow valve that Ceramic Balls and ball seat form, and then realizes pressurization, unloading function；The party
Case structure composition is complicated, assembly is not easy, and failure rate is higher in use process, it is difficult to meet the needs of underground.
For this purpose, a kind of structure is badly in need of in this field simple, willing pressurization unloading integrated valve.
Summary of the invention
The present invention proposes a kind of unloading valve mechanical pilot valves, including guide valve blocks, is provided on the guide valve blocks and is
System pressure port, oil supply pressure mouth and return hydraulic coupling mouth；In the guide valve blocks include spool and valve seat, the spool, valve seat and
The shells of guide valve blocks constitutes the first hydraulic cavities I, and the first hydraulic cavities I is connected with the oil supply pressure mouth；The guide
Include swivel nut in valve body, control mandril is installed in the swivel nut；The control mandril and the swivel nut constitute the second hydraulic cavities
II, the second hydraulic cavities II are connected with the system pressure mouth；The control mandril and the spool are positioned opposite, described
The region controlled between mandril and the spool constitutes third hydraulic cavities III, the third hydraulic cavities III and the return hydraulic coupling
Mouth is connected.Affiliated guide valve blocks also include pressure spring component, carry out pressure setting.
Pressurization-unloading pressure range can be predefined by the sealing relationship of the guide valve blocks, spool and valve seat, not depended on
The constituent element of feather valve primary portion, corresponding valve port are directly connected to, and mechanical pilot valves are relatively independent, and adaptability is good；Institute
Control mandril is stated to match with the pressure spring regulation component, control the spool and valve seat unlatches and closes movement, into
And realize Automatic-boosting-unloading function, flooding process is not depended on, seal request is reduced, structure is simplified, it is easy to accomplish,
Automatic-boosting, automatic deloading control effectively can be carried out to hydraulic power source, are particularly suitable in the emulsion system of underground.
Detailed description of the invention
Attached drawing 1 is the structural schematic diagram of unloading valve pilot valve of the present invention,
Attached drawing 2 is the hydraulic function figure of unloading valve pilot valve of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing.
It is a preferred embodiment of unloading valve mechanical pilot valves of the present invention referring to attached drawing 1, it can be with feather valve
Primary portion be used cooperatively, be a kind of purely mechanic pilot valve, the movement for pilot control emulsion pump and workpiece.
Unloading valve mechanical pilot valves include guide valve blocks, and system pressure mouth 2, oil supply pressure mouth 1 are provided on guide valve blocks and returns liquid
Pressure port 3 is connected with the corresponding pressure mouth of feather valve primary portion respectively；It include spool 5 and valve seat 6, valve in guide valve blocks
Core 5, guide valve blocks, the region between 6 three of valve seat constitute the first hydraulic cavities I, which is connected with oil supply pressure mouth 1；
Include swivel nut 7 in guide valve blocks, control mandril 4 is installed in 7 hole of swivel nut；It controls 4 end of mandril and the composition second of swivel nut 7 is hydraulic
Chamber II, the hydraulic cavities are connected with system pressure mouth 2；It controls mandril 4 and spool 5 is positioned opposite, region between the two is constituted
Third hydraulic cavities III, the hydraulic cavities are connected with return hydraulic coupling mouth 3；It further include pressure spring component, pressure regulation bullet on guide valve blocks
Spring component is made of spring 8, pressure regulation swivel nut 9, locking part.
Referring to attached drawing 1-2, in use, originally system pressure is lower, the insufficient pressure in the second hydraulic cavities II, valve
Core 5 and control mandril 4 are in initial position, and the first hydraulic cavities I and third hydraulic cavities III are blocked, system boost.With system
Pressure gradually rises, and the pressure in the second hydraulic cavities II increases therewith, until reaching setup pressure value, control mandril 4 is pushed to make
Spool 5 is separated with valve seat 6, deviates initial position, and the first hydraulic cavities I and third hydraulic cavities III are conducted, and controls unloading valve main
Partial relief, oil sources directly return liquid, reduce power consumption, this is automatic offloading functions；Make system pressure when leakage or with reasons such as liquid
When reduction, the pressure reduction of the second hydraulic cavities II pushes spool 5 and control mandril 4 to the second liquid due to the active force of spring 8
Press the direction of chamber II mobile, the first hydraulic cavities I and third hydraulic cavities III partition, control unloading valve primary portion pressurization, oil sources to
System supplies high-pressure work liquid, and system pressure increases, this is Automatic-boosting function.
It controls mandril 4 and spool 5 is two sseparated components, be located at interval in third hydraulic cavities III.It is this separately to set
The stability of system can be improved in the mode set, and reduces the susceptibility of pilot system, is more suitable for the use of subsurface environment, adds simultaneously
Work and installation are all more convenient.
Pressurization-unloading pressure can be predefined by the sealing relationship of guide valve blocks, spool 5 and valve seat 6, mechanical pilot valves shape
At an independent functional unit, valve port corresponding with feather valve main is directly connected to, and adaptability is good；Pressurization-unloading function
Flooding process is not depended on, seal request is reduced, structure is simplified；The reliability of system can be improved in this scheme, reduces
The susceptibility of pilot system, is processed and assembly is easier to realize, effectively can carry out Automatic-boosting, automatic deloading control to hydraulic power source
System；Pressurization-off-load-overflow one, structure is simple, easy for installation, the pattern of pilot valve can be designed according to the shape of main valve, especially
It is suitable in the emulsion system of underground.
The preferable specific embodiment of the above, only the invention patent, but the scope of protection of the patent of the present invention is not
It is confined to this, anyone skilled in the art can readily occur in the technical scope that the invention patent discloses
Change or replacement, should all cover within the scope of protection of the patent of the invention.
Claims (3)
1. a kind of unloading valve mechanical pilot valves, including guide valve blocks, which is characterized in that be provided with valve on the guide valve blocks
Core, valve seat, swivel nut, system pressure mouth, oil supply pressure mouth and return hydraulic coupling mouth；
The shell of the spool, valve seat and guide valve blocks constitutes the first hydraulic cavities, first hydraulic cavities and the oil supply pressure
Mouth is connected；
Control mandril is installed, the control mandril and the swivel nut constitute the second hydraulic cavities, second liquid in the swivel nut
Pressure chamber is connected with the system pressure mouth；
The control mandril and the spool are positioned opposite, and the region between the control mandril and the spool constitutes third liquid
Chamber is pressed, the third hydraulic cavities are connected with the return hydraulic coupling mouth；
When initial system pressure is lower, first hydraulic cavities and third hydraulic cavities are mutually separated；When system boost, with being
It unites pressure rise, pressure increase in second hydraulic cavities pushes the control mandril to make the spool valve seat separation, described
First hydraulic cavities and the conducting of third hydraulic cavities, realize automatic unloading.
2. unloading valve mechanical pilot valves as described in claim 1, it is characterised in that: further include pressure regulation on the guide valve blocks
Spring assembly, the pressure spring component include spring, pressure regulation swivel nut, locking part, and the pressure spring component is for carrying out
Pressure setting.
3. unloading valve mechanical pilot valves as claimed in claim 2, it is characterised in that: when the system pressure drops, the tune
Spool described in pressing spring components drive and the control mandril are mobile to the described second hydraulic cavity direction, so that described first is hydraulic
Chamber and third hydraulic cavities partition, realize Automatic-boosting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710368189.3A CN107255185B (en) | 2017-05-23 | 2017-05-23 | A kind of unloading valve mechanical pilot valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710368189.3A CN107255185B (en) | 2017-05-23 | 2017-05-23 | A kind of unloading valve mechanical pilot valves |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107255185A CN107255185A (en) | 2017-10-17 |
| CN107255185B true CN107255185B (en) | 2019-04-23 |
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ID=60027354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710368189.3A Active CN107255185B (en) | 2017-05-23 | 2017-05-23 | A kind of unloading valve mechanical pilot valves |
Country Status (1)
| Country | Link |
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| CN (1) | CN107255185B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111219511A (en) * | 2019-10-29 | 2020-06-02 | 北京天地玛珂电液控制***有限公司 | Electromagnetic unloading valve for aqueous medium mine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201155498Y (en) * | 2008-01-21 | 2008-11-26 | 浙江圣邦机械有限公司 | Integrated one-way balance valve |
| KR100961431B1 (en) * | 2008-02-25 | 2010-06-09 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | Relive valve |
| CN201288869Y (en) * | 2008-10-28 | 2009-08-12 | 上海立新液压有限公司 | Balance control valve |
| KR100950571B1 (en) * | 2009-02-27 | 2010-04-01 | (주)동우정공 | Relief valve of heavy equipment |
| CN101749255B (en) * | 2010-01-14 | 2012-01-25 | 北京天地玛珂电液控制***有限公司 | Pilot valve of pump unloading valve |
| CN206802455U (en) * | 2017-05-23 | 2017-12-26 | 北京煤科天玛自动化科技有限公司 | A kind of unloading valve mechanical pilot valves |
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2017
- 2017-05-23 CN CN201710368189.3A patent/CN107255185B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107255185A (en) | 2017-10-17 |
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| PB01 | Publication | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20201027 Address after: 100013 Beijing, Hepingli Youth ditch East Road, building No. 5, room and floor, No. 131, No. Patentee after: BEIJING TIANDI-MARCO ELECTRO-HYDRAULIC CONTROL SYSTEM Co.,Ltd. Patentee after: BEIJING CCRI-TIANMA AUTOMATION TECHNOLOGY Co.,Ltd. Address before: 100013, Beijing, Hepingli Youth ditch East Road, building 5, one floor Patentee before: BEIJING CCRI-TIANMA AUTOMATION TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No.131, ground floor, Tiandi building, No.5, qingniangou East Road, Hepingli, Chaoyang District, Beijing 100013 Patentee after: CCTEG Beijing Tianma Intelligent Control Technology Co.,Ltd. Patentee after: BEIJING CCRI-TIANMA AUTOMATION TECHNOLOGY Co.,Ltd. Address before: No.131, ground floor, Tiandi building, No.5, qingniangou East Road, Hepingli, Chaoyang District, Beijing 100013 Patentee before: BEIJING TIANDI-MARCO ELECTRO-HYDRAULIC CONTROL SYSTEM Co.,Ltd. Patentee before: BEIJING CCRI-TIANMA AUTOMATION TECHNOLOGY Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |