CN105065736A - Load self-adaptive safety valve adopting changeable throttling orifice - Google Patents
Load self-adaptive safety valve adopting changeable throttling orifice Download PDFInfo
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- CN105065736A CN105065736A CN201510411420.3A CN201510411420A CN105065736A CN 105065736 A CN105065736 A CN 105065736A CN 201510411420 A CN201510411420 A CN 201510411420A CN 105065736 A CN105065736 A CN 105065736A
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- valve
- spool
- main oil
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention relates to a load self-adaptive safety valve adopting a changeable throttling orifice. Hydraulic oil from a hydraulic system passes a main oil inlet passage, a passage, a valve port and a through-flow hole arranged in a valve core, and then enters a valve core lower cavity; oil pressure in the lower cavity makes the valve core in a balanced static state; at this moment, a main valve port does not open, the main oil inlet passage is not communicated with a main oil outlet passage, and the safety valve closes. When equipment is subject to impact load, oil pressure supplied by the main oil inlet passage rises; the oil pressure in the lower cavity rises; the valve core moves upwards; accordingly, a communicating area of the through-flow hole and an oil inlet valve port is increased; pressure loss is decreased when fluid flows past the oil inlet valve port; the oil pressure in the lower cavity rises at accelerating speed; the valve core is driven to move upwards at accelerating speed, and the main valve port is driven to open at accelerating speed; so that communicating speed of the main oil inlet passage and the main oil outlet passage is increased; response time for the opening of the safety valve is shortened; the speed of the valve moving upwards is in positive correlation with the impact load.
Description
Technical field
The present invention relates to a kind of load adaptive security valve adopting settable orifice, specifically, be the safety valve that a kind of restriction flow area changes with valve element position, belong to hydrovalve technical field.
Background technique
The widely used hydraulic support of automation coal mining fully mechanized coal face, above rock always push up periodically rupture time, be subject to strong impact.According to mine geology condition, every 8 ~ 40 meters are pushed up fracture once always, and hydraulic support bears an intense impact.Cause supporting to be lost efficacy if impulsive load crosses senior general, time serious, jeopardize equipment and the personal security of working surface.In order to improve adaptability and the reliability of hydraulic support, the column (oil hydraulic cylinder) in protection hydraulic support, reduces the pressure peak in impulsive load lower pillar stand, needs to adopt safety valve column (oil hydraulic cylinder) to carry out in time, effective off-load.The difficult point solving this technical problem is, the hydraulic cylinder works pressure in similar above-mentioned main equipment is high, and flow is large, and the Strong Impact Loading endurance is short, and response time, the control power of existing control valve or control technique are difficult to meet user demand.
Summary of the invention
The technical issues that need to address of the present invention are: when the column in prior art in the hydraulic support of mining to automation carries out protecting against shock protection; because the hydraulic cylinder works pressure in this type of main equipment is high; flow is large; the Strong Impact Loading endurance is short; and the response time that the safety valve adopted controls is longer, therefore safety valve controls sensitivity level, control power is difficult to meet user demand.
The present invention takes following technological scheme:
Adopt a load adaptive security valve for settable orifice, comprise spool 1, valve body 2, pressure adjusting spring 3, adjusting nut 4; Spool and valve body surround in epicoele 5 and cavity of resorption 6, spool be provided with through flow hole 7, valve body are arranged oil-feed valve port 8, passage 9 and hydraulic system UNICOM main oil inlet passage 10, main oil discharge passage 11, form primary valve 12 between spool and main oil discharge passage; The through flow hole 7 arranged in main oil inlet passage 10, passage 9, valve port 8, spool from the hydraulic oil of hydraulic system enters spool cavity of resorption 6, oil pressure in cavity of resorption 6 makes spool 1 be in the state of rest of balance, now primary valve 12 is not opened, main oil inlet passage 10 and main oil discharge passage 11 are not linked up, and safety valve cuts out; When equipment is subject to impulsive load, main oil inlet passage 10 supplies oil pressure and rises, in cavity of resorption 6, oil pressure rises, spool 1 moves up, and through flow hole 7 and oil-feed valve port 8 are connected area and promoted thereupon, and fluid flows through pressure loss reduction during oil-feed valve port 8, cavity of resorption 6 internal pressure is accelerated to rise, promote spool 1 primary valve 12 that accelerates to move upward to accelerate to open, thus improve main oil inlet passage 10 and main oil discharge passage 11 be communicated with speed, shorten the response time of safety valve unlatching; The speed that spool 1 moves up and impulsive load positive correlation.
Further, described spool 1 is in I shape, and main oil inlet passage 10 is corresponding with spool 1 medium position.
Further, described load adaptive security valve is used alone, or uses as the pilot valve of two-stage pressure relief valve.
Further, described load adaptive security valve is the safety valve of the oil hydraulic cylinder impact off-load in automation coal mining fully mechanized coal face hydraulic support.
Adopt a load adaptive security valve for settable orifice, comprise spool 1, valve body 2, pressure adjusting spring 3, adjusting nut 4; Spool and valve body surround in epicoele 5 and cavity of resorption 6, spool be provided with through flow hole 7, valve body are arranged oil-feed valve port 8, passage 9 and hydraulic system UNICOM main oil inlet passage 10, main oil discharge passage 11, form primary valve 12 between spool and main oil discharge passage; The through flow hole 7 arranged in main oil inlet passage 10, passage 9, valve port 8, spool from the hydraulic oil of hydraulic system enters spool epicoele 5, oil pressure in upper and lower chamber 5,6 and the elastic force of pressure adjusting spring 3 make spool 1 be in the state of rest of balance, now primary valve 12 is not opened, main oil inlet passage 10 and main oil discharge passage 11 are not linked up, and safety valve cuts out; When equipment is subject to impulsive load, main oil inlet passage 10 supplies oil pressure and rises, in cavity of resorption 6, oil pressure rises, and spool 1 moves up, and through flow hole 7 and oil-feed valve port 8 are connected area and reduced thereupon, fluid flows through pressure loss increase during oil-feed valve port 8, epicoele 5 internal pressure is accelerated to decline, and cavity of resorption 6 internal pressure promotes spool 1 and accelerates to move upward, and primary valve 12 accelerates to open, thus improve main oil inlet passage 10 and main oil discharge passage 11 be communicated with speed, shorten the response time that safety valve is opened; The speed that spool 1 moves up and impulsive load positive correlation.
Further, described load adaptive security valve uses as the main valve level of two-stage pressure relief valve.
Beneficial effect of the present invention is:
1) solve safety valve low-response under Strong Impact Loading, the response time of existing control valve or control technique is difficult to meet user demand, the long-standing technical barrier in this related domain.
2) structure is simple, and it is convenient to implement, and with low cost, little input, returns greatly.
3) adopt the load adaptive security valve of settable orifice to can be used as independently parts and be used in other equipments had under strong impact environment, also can be used in two-stage pressure relief valve or relief valve and use as main valve or pilot valve, there are the market prospects of wide popularization and application.
4) degree that rises of main oil inlet passage supply oil pressure produces voluntarily with the size of impulsive load, therefore the velocity and acceleration that moves up of spool all with the size positive correlation of impulsive load, realize passive load self adaption.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention adopts the load adaptive security valve of settable orifice.
Fig. 2 is a kind of another kind of structural principle schematic diagram adopting the load adaptive security valve of settable orifice of the present invention.
In figure, 1. spool, 2. valve body, 3. pressure adjusting spring, 4. adjusting nut, 5. epicoele, 6. cavity of resorption, 7. through flow hole, 8. oil-feed valve port, 9. passage, 10. main oil inlet passage, 11. main oil discharge passages, 12. primary valves, 13. pilot stage safety valves.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further described.
Embodiment (one):
See Fig. 1, a kind of load adaptive security valve adopting settable orifice, comprises spool 1, valve body 2, pressure adjusting spring 3, adjusting nut 4, epicoele 5, cavity of resorption 6, through flow hole 7, oil-feed valve port 8, passage 9, main oil inlet passage 10, main oil discharge passage 11, primary valve 12.
Hydraulic oil from hydraulic system enters cavity of resorption 6 through main oil inlet passage 10, passage 9, valve port 8, through flow hole 7.Hydraulic power, frictional force etc. when the power acted on spool 1 has hydraulic coupling upwards, downward spring force, spool 1 to move.When act on spool 1 make a concerted effort downward time, primary valve 12 is not opened, and main oil inlet passage 10 and main oil discharge passage 11 are not linked up, safety valve close.When act on spool 1 make a concerted effort upwards time, spool 1 moves up, and primary valve 12 is opened, and main oil inlet passage 10 is communicated with main oil discharge passage 12, safety valve open.
The flow area that the through flow hole 7 that spool 1 inside is arranged and valve body are formed between the valve port 8 that arranges, changes along with the movement of spool 1.When spool 1 moves up, flow area increases, the pressure loss that fluid flows through valve port 8 reduces, pressure in cavity of resorption 6 raises, act on hydraulic coupling increase upwards on spool 1, the acceleration that spool 1 moves up increases, and primary valve 12 opening speed is accelerated, thus accelerates the response time of safety valve.
When impulsive load is less, the travelling speed of spool 1 is comparatively slow, and the flow area of valve port 8 is less, and the pressure loss on valve port 8 is comparatively large, and the pressure of cavity of resorption 6 is less, and primary valve 12 opening speed is slower.When impulsive load is larger, the travelling speed of spool 1 is very fast, and the pressure in cavity of resorption 6 raises very fast, and primary valve 12 opening speed and acceleration are all very fast, thus have adapted to load change.
Embodiment (two):
See Fig. 2, a kind of load adaptive security valve adopting settable orifice, comprises spool 1, valve body 2, pressure adjusting spring 3, adjusting nut 4; Spool and valve body surround in epicoele 5 and cavity of resorption 6, spool be provided with through flow hole 7, valve body are arranged oil-feed valve port 8, passage 9 and hydraulic system UNICOM main oil inlet passage 10, main oil discharge passage 11, form primary valve 12 between spool and main oil discharge passage; The through flow hole 7 arranged in main oil inlet passage 10, passage 9, valve port 8, spool from the hydraulic oil of hydraulic system enters spool epicoele 5, oil pressure in upper and lower chamber 5,6 and the elastic force of pressure adjusting spring 3 make spool 1 be in the state of rest of balance, now primary valve 12 is not opened, main oil inlet passage 10 and main oil discharge passage 11 are not linked up, and safety valve cuts out; When equipment is subject to impulsive load, main oil inlet passage 10 supplies oil pressure and rises, in cavity of resorption 6, oil pressure rises, and spool 1 moves up, and through flow hole 7 and oil-feed valve port 8 are connected area and reduced thereupon, fluid flows through pressure loss increase during oil-feed valve port 8, epicoele 5 internal pressure is accelerated to decline, and cavity of resorption 6 internal pressure promotes spool 1 and accelerates to move upward, and primary valve 12 accelerates to open, thus improve main oil inlet passage 10 and main oil discharge passage 11 be communicated with speed, shorten the response time that safety valve is opened; The speed that spool 1 moves up and impulsive load positive correlation.
Described load adaptive security valve uses as the main valve level of two-stage pressure relief valve.
Be more than illustrating of embodiment of the present invention, the present embodiment implements under premised on technical solution of the present invention, give detailed mode of execution and concrete operating process, but protection scope of the present invention is not limited to the above embodiments.
Claims (6)
1. adopt a load adaptive security valve for settable orifice, it is characterized in that:
Comprise spool (1), valve body (2), pressure adjusting spring (3), adjusting nut (4);
Spool and valve body surround in epicoele (5) and cavity of resorption (6), spool be provided with through flow hole (7), valve body are arranged oil-feed valve port (8), passage (9), and the main oil inlet passage (10) of hydraulic system UNICOM, main oil discharge passage (11), between spool and main oil discharge passage, form primary valve (12);
The through flow hole (7) arranged in main oil inlet passage (10), passage (9), valve port (8), spool from the hydraulic oil of hydraulic system enters spool cavity of resorption (6), oil pressure in cavity of resorption (6) makes spool (1) be in the state of rest of balance, now primary valve (12) is not opened, main oil inlet passage (10) and main oil discharge passage (11) are not linked up, and safety valve cuts out;
When equipment is subject to impulsive load, main oil inlet passage (10) supply oil pressure rises, the interior oil pressure of cavity of resorption (6) rises, spool (1) moves up, through flow hole (7) and oil-feed valve port (8) are connected area and are promoted thereupon, fluid flows through pressure loss reduction time oil-feed valve port (8), cavity of resorption (6) internal pressure is accelerated to rise, promote spool (1) to accelerate to move upward, primary valve (12) accelerates to open, thus improve main oil inlet passage (10) and main oil discharge passage (11) be communicated with speed, shorten the response time that safety valve is opened;
The speed that spool (1) moves up and impulsive load positive correlation.
2. load adaptive security valve as claimed in claim 1, is characterized in that: described spool (1) is in I shape, and main oil inlet passage (10) is corresponding with spool (1) medium position.
3. load adaptive security valve as claimed in claim 1, is characterized in that: described load adaptive security valve is used alone, or uses as the pilot valve of two-stage pressure relief valve.
4. load adaptive security valve as claimed in claim 1, is characterized in that: described load adaptive security valve is the safety valve of the impact off-load in automation coal mining fully mechanized coal face hydraulic support.
5. adopt a load adaptive security valve for settable orifice, it is characterized in that:
Comprise spool (1), valve body (2), pressure adjusting spring (3), adjusting nut (4);
Spool and valve body surround in epicoele (5) and cavity of resorption (6), spool be provided with through flow hole (7), valve body are arranged oil-feed valve port (8), passage (9), and the main oil inlet passage (10) of hydraulic system UNICOM, main oil discharge passage (11), between spool and main oil discharge passage, form primary valve (12);
The through flow hole (7) arranged in main oil inlet passage (10), passage (9), valve port (8), spool from the hydraulic oil of hydraulic system enters spool epicoele (5), oil pressure in upper and lower chamber (5,6) and the elastic force of pressure adjusting spring (3) make spool (1) be in the state of rest of balance, now primary valve (12) is not opened, main oil inlet passage (10) and main oil discharge passage (11) are not linked up, and safety valve cuts out;
When equipment is subject to impulsive load, main oil inlet passage (10) supply oil pressure rises, the interior oil pressure of cavity of resorption (6) rises, spool (1) moves up, through flow hole (7) and oil-feed valve port (8) are connected area and are reduced thereupon, fluid flows through pressure loss increase time oil-feed valve port (8), epicoele (5) internal pressure is accelerated to decline, cavity of resorption (6) internal pressure promotes spool (1) and accelerates to move upward, primary valve (12) accelerates to open, thus improve main oil inlet passage (10) and main oil discharge passage (11) be communicated with speed, shorten the response time that safety valve is opened,
The speed that spool (1) moves up and impulsive load positive correlation.
6. load adaptive security valve as claimed in claim 5, described load adaptive security valve uses as the main valve level of two-stage pressure relief valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510411420.3A CN105065736B (en) | 2015-07-14 | 2015-07-14 | A kind of load adaptive security valve of use settable orifice |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510411420.3A CN105065736B (en) | 2015-07-14 | 2015-07-14 | A kind of load adaptive security valve of use settable orifice |
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| Publication Number | Publication Date |
|---|---|
| CN105065736A true CN105065736A (en) | 2015-11-18 |
| CN105065736B CN105065736B (en) | 2017-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510411420.3A Active CN105065736B (en) | 2015-07-14 | 2015-07-14 | A kind of load adaptive security valve of use settable orifice |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106051243A (en) * | 2016-07-28 | 2016-10-26 | 上海交通大学 | Quick response safety valve adopting nonlinear regulating spring |
| CN107255057A (en) * | 2017-07-11 | 2017-10-17 | 重庆万力联兴实业(集团)有限公司 | Automobile pilot-operated type fuel pump pressure regulator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0620370A1 (en) * | 1992-10-29 | 1994-10-19 | Hitachi Construction Machinery Co., Ltd. | Hydraulic control valve device and hydaulically driving device |
| CN1749584A (en) * | 2005-09-20 | 2006-03-22 | 杭州和利时自动化有限公司 | Novel overspeed petective slide valve |
| CN202545911U (en) * | 2012-03-31 | 2012-11-21 | 宁波市甬方机械有限公司 | Unloading valve |
| CN203348653U (en) * | 2013-06-26 | 2013-12-18 | 无锡商业职业技术学院 | Directly-operated type sequence valve |
-
2015
- 2015-07-14 CN CN201510411420.3A patent/CN105065736B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0620370A1 (en) * | 1992-10-29 | 1994-10-19 | Hitachi Construction Machinery Co., Ltd. | Hydraulic control valve device and hydaulically driving device |
| CN1749584A (en) * | 2005-09-20 | 2006-03-22 | 杭州和利时自动化有限公司 | Novel overspeed petective slide valve |
| CN202545911U (en) * | 2012-03-31 | 2012-11-21 | 宁波市甬方机械有限公司 | Unloading valve |
| CN203348653U (en) * | 2013-06-26 | 2013-12-18 | 无锡商业职业技术学院 | Directly-operated type sequence valve |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106051243A (en) * | 2016-07-28 | 2016-10-26 | 上海交通大学 | Quick response safety valve adopting nonlinear regulating spring |
| CN107255057A (en) * | 2017-07-11 | 2017-10-17 | 重庆万力联兴实业(集团)有限公司 | Automobile pilot-operated type fuel pump pressure regulator |
| CN107255057B (en) * | 2017-07-11 | 2023-07-11 | 重庆万力联兴实业(集团)有限公司 | Automobile pilot type fuel pump pressure regulator |
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| Publication number | Publication date |
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| CN105065736B (en) | 2017-09-12 |
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