CN103775438B - Overload protection valve and the overload valve containing overload protection valve - Google Patents
Overload protection valve and the overload valve containing overload protection valve Download PDFInfo
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- CN103775438B CN103775438B CN201310748858.1A CN201310748858A CN103775438B CN 103775438 B CN103775438 B CN 103775438B CN 201310748858 A CN201310748858 A CN 201310748858A CN 103775438 B CN103775438 B CN 103775438B
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Abstract
The invention discloses a kind of overload protection valve and the overload valve containing overload protection valve, relate to technical field of engineering machinery.Including valve pocket, pressure regulation leading screw, it is characterized in that: the rear end of valve pocket connects valve housing, the front end of pressuring adjusting valve base is provided with external screw thread, pressuring adjusting valve base front end is threaded connection the rear inside being fixed on valve housing, and pressure regulation leading screw extend into the inside of valve housing through pressuring adjusting valve base；Between spool and pressuring adjusting valve base, the inner side of valve housing is provided with spring.During in order to solve to carry in prior art relief valve work, flooding velocity the most maybe cannot work, and causes being controlled the problem of parts damages.And also to solve overload relief valve not there is the function to system big chamber repairing; thus need extraneous auxiliary to carry out repairing; improve entreprise cost problem, it is provided that a kind of have simple in construction, start-stop performance is good, flooding velocity is fast, length in service life, can carry out the advantages such as repairing work overload protection valve and contain overload protection valve overload valve.
Description
Technical field
The present invention relates to technical field of engineering machinery, particularly relate to a kind of overload protection valve and the overload valve containing overload protection valve.
Background technology
Hydraulic valve is the Automation Elements of a kind of pressure oil operation, and it is controlled by distributing valve pressure oil, is generally applied in combination with electromagnetic distributing valve, can be used for distant control power station oil, the break-make of gas and water pipe-line system.Wherein being used for controlling the pressure-control valve that is also called of pressure, the overflow valve in pressure-control valve is to control hydraulic system to keep steady state when reaching set pressure.Wherein it is referred to as overload relief valve with the overflow valve of what overload protection.Working as system jam, when pressure is increased to the limit value being likely to result in destruction, the valve port of overload relief valve can be opened and overflow, to ensure the safety of system.But the flooding velocity of current overflow valve is relatively slow, and start-stop performance is poor, it is impossible to reach the purpose of fast and stable overflow, it is likely to result in the damage being controlled parts, brings bigger economic loss.Use opening, owing to spring set-up mode is not reasonable of spring mode control valve, it is easy to the situation of the twisting that bends simultaneously, cause overload relief valve can not use when needs work.The most general overload relief valve does not have repairing function, needs when the repairing of system big chamber, and electromotor to be passed through controls mailbox and carries out repairing, causes the consumption of the energy, improves the cost of enterprise.
Summary of the invention
During in order to solve to carry in prior art relief valve work, flooding velocity the most maybe cannot work, and causes being controlled parts damages, brings bigger economic loss and the problem that security incident occurs.And also to solve overload relief valve do not have the function to system big chamber repairing, thus need extraneous auxiliary to carry out repairing, consume the energy, the problem improving entreprise cost.The invention provides a kind of there is simple in construction, start-stop performance is good, flooding velocity is fast, length in service life, can carry out the overload protection valve of the advantages such as repairing work and containing the overload valve of overload protection valve.
In order to achieve the above object, the technical solution used in the present invention is:
A kind of overload protection valve; including valve pocket, pressure regulation leading screw, pressuring adjusting valve base, locking nut; it is characterized in that: also include spool, spring, valve housing; the rear end of described valve pocket connects valve housing; the front end of pressuring adjusting valve base is provided with external screw thread; described pressuring adjusting valve base front end is threaded connection the rear inside being fixed on valve housing, and described pressure regulation leading screw extend into the inside of valve housing through pressuring adjusting valve base；It is internally provided with through horizontal run at valve pocket, described horizontal run is made up of the thick runner at rear portion and anterior thread road, described spool is arranged in the thick runner of valve pocket, and the front end of spool is triangle, two faces of triangle each prop up homonymy thread road and are transformed to the step surface of thick runner, offering vertical-sprue in thick runner front end, between spool and pressuring adjusting valve base, the inner side of valve housing is provided with spring.
Aforesaid a kind of overload protection valve, it is characterised in that: it is respectively arranged with sealing ring outside described valve pocket, outside valve housing and outside pressuring adjusting valve base.
Aforesaid a kind of overload protection valve, it is characterised in that: described valve pocket and valve housing are processed respectively, and valve pocket rear end uses snap fit to be connected with valve housing front end.
Aforesaid a kind of overload protection valve, it is characterised in that: described thread road is made up of anterior particle size stream and the thin footpath stream being connected with thick runner.
Aforesaid a kind of overload protection valve, it is characterised in that: the diameter 10mm of described particle size stream, the diameter 6.5mm of described thin footpath stream.
Aforesaid a kind of overload protection valve; it is characterized in that: the rear end of spool is provided with spring base; the front end of pressure regulation leading screw is provided with pressure regulating seat; the center of described spring base and the center of pressure regulating seat are in same level line; spring base and pressure regulating seat are respectively equipped with boss; one end of described spring is fastened on the both sides of spring base boss, and the other end of spring is fastened on the both sides of pressure regulating seat boss.
Aforesaid a kind of overload protection valve, it is characterised in that: the rear end of pressure regulating seat being provided with whirlpool groove, is provided with Surface of Sphere in the front end of pressure regulation leading screw, described Surface of Sphere inserts in the groove of whirlpool.
A kind of overload valve containing overload protection valve, including overload valve valve body, overload valve valve inner is provided with overload protection valve, the rear end of overload protection valve is provided with big cavity segment, the stream being connected with big cavity segment is provided with nonreturn valve core, described nonreturn valve core is flexibly connected with the location plug screw being arranged on its rear end by spring, valve inner is provided with square stream, the vertical-sprue of described overload protection valve is through with an opening of square stream to be connected, the stream that described and big cavity segment is connected is connected with another opening of square stream, and the front end face of nonreturn valve core props up another opening of square stream.
The invention has the beneficial effects as follows:
1, the present invention realizes the overflow purpose of overload protection valve by the motion in valve pocket of spool; thread road is made up of anterior particle size stream and the thin footpath stream being connected with thick runner; by original thin and long thread pipe is thicker; reduced the resistance of oil; accelerate from the big intracavity of system to the oil-feed speed of overload protection valve; start-stop performance improves; it is capable of the control of quick-make; control external system sensitivity higher; improve the work efficiency of external system, it also avoid the damage of external system.
2, the present invention utilizes the Surface of Sphere of pressure regulation leading screw to be locked in inserting the whirlpool groove of pressure regulating seat, ensure that pressure regulating seat stably will not be eccentric, spring is arranged fixing by the boss of spring base and the boss cooperation of pressure regulating seat simultaneously, ensure that the concentricity of spring, so spring does not operationally have the situation generation of bending twisting, ensure that the normal work of overload relief valve, also extend the service life of whole overload relief valve.
3, valve pocket and the valve housing of the present invention is processed respectively, then uses snap fit to be connected with valve housing front end valve pocket rear end, is so greatly accelerated both process velocities, and machining accuracy is higher also relative to overall processing.
4, the overload valve of the present invention also has repairing function; utilize overload protection valve fuel feeding in square stream, and now system big intracavity portion is because oil starvation forms negative pressure, drives spring compression; making nonreturn valve core leave the opening of stream, oil can be flowed into big intracavity portion in opening and realize repairing.
Accompanying drawing explanation
Fig. 1 is overload protection valve arrangement schematic diagram of the present invention；
Fig. 2 is housing configuration schematic diagram of the present invention；
Fig. 3 is valve core structure schematic diagram of the present invention；
Fig. 4 is valve housing structural representation of the present invention；
Fig. 5 is pressure regulation screw structure schematic diagram of the present invention；
Fig. 6 is pressuring adjusting valve base structural representation of the present invention；
Fig. 7 is pressure regulating seat structural representation of the present invention；
Fig. 8 is the structural representation that the present invention contains the overload valve of overload protection valve.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.
As shown in the figure; a kind of overload protection valve; including valve pocket 1, spool 2, valve housing 3, pressure regulation leading screw 4, pressuring adjusting valve base 5, locking nut 6; in order to improve the airtight performance of overload valve; outside valve pocket 1, it is provided with sealing ring 7, outside valve housing 3, is provided with sealing ring 10, outside pressuring adjusting valve base 5, be provided with sealing ring 12.Connect in the rear end of valve pocket 1 and have valve housing 3, be processed respectively to improve both process velocity and machining accuracy, valve pocket 1 and valve housing 3, and valve pocket 1 rear end uses snap fit to be connected with valve housing 3 front end.Be provided with external screw thread in the front end of pressuring adjusting valve base 5, pressuring adjusting valve base 5 is matched fixing connection with valve housing 3 rear end female thread by front end external screw thread, is fixed on the rear inside of valve housing 3.Pressure regulation leading screw 4 extend into the inside of valve housing 3 through pressuring adjusting valve base 5.
It is internally provided with through horizontal run at valve pocket 1, horizontal run is made up of thick runner 13 and the anterior thread road 14 at rear portion, in order to accelerate the oil flowing velocity in thread road 14, reduced oil resistance, improve start-stop performance, the thread road 14 that can increase is crossed pasta and is amassed, thread road 1 includes anterior particle size stream 17 and the thin footpath stream 16 being connected with thick runner 13, the diameter 10mm of particle size stream during design, the diameter 6.5mm of thin footpath stream, so substantially increase the mistake oil mass in thread road 14, accelerate flooding velocity.
Spool 2 is arranged in the thick runner 13 of valve pocket 1, and the front end of spool 2 is triangle 22, and two faces of triangle 22 each prop up homonymy thread road 14 and are transformed to the step surface of thick runner 13, offers vertical-sprue 15 in thick runner 13 front end.The rear end of spool 2 is provided with spring base 8, the front end of pressure regulation leading screw 4 is provided with pressure regulating seat 11, the center of spring base 8 and the center of pressure regulating seat 11 are in same level line, spring base 8 is provided with boss 21, pressure regulating seat 11 is also equipped with boss 20, one end of spring 9 is fastened on the both sides of spring base 8 boss 21, and the other end of spring 9 is fastened on the both sides of pressure regulating seat 11 boss 20.The rear end of pressure regulating seat 11 being provided with whirlpool groove 19, is provided with Surface of Sphere 18 in the front end of pressure regulation leading screw 4, Surface of Sphere 18 is locked in inserting whirlpool groove 19, it is ensured that pressure regulating seat 11 stably will not be eccentric.So design has higher concentricity before and after can making spring 9, and spring 9 does not operationally have the situation of bending twisting and occurs, it is ensured that the normal work of overload relief valve, also extends the service life of whole overload relief valve.
Simultaneously in order to realize the repairing function in overload protection valve chamber big to system, overload valve is set, including overload valve valve body 23, it is internally provided with overload protection valve 24 at overload valve valve body 23, big cavity segment 25 it is provided with in the rear end of overload protection valve 24, the stream 26 being connected with big cavity segment 25 is provided with nonreturn valve core 27, nonreturn valve core 27 is flexibly connected with the location plug screw 29 being arranged on its rear end by spring 28, it is internally provided with square stream 30 at valve body 23, the vertical-sprue 15 of overload protection valve 24 is through with an opening 31 of square stream 30 to be connected, the stream 26 being connected with big cavity segment 25 is connected with another opening 32 of square stream 30, and the front end face of nonreturn valve core 27 props up another opening 32 of square stream 30.
When needs overflow carries out Overload Protection; when i.e. in system, pressure exceedes overload protection valve setting pressure; big cavity segment 25 is to thread road 14 oil-feed of overload protection valve 24; when the pressure of oil-feed overcomes the elastic force of spring 9; spring 9 is compacted; band movable valve plug 2 moves; the front end making spool 2 is separated with step surface; in so oil is flowed into the thick runner 13 of overload protection valve 24; and the vertical-sprue 15 offered from thick runner 13 front end exits in right angled triangle stream 30, and it is eventually returned to fuel tank.When not carrying out overload protection, spring 9 resets, and band movable valve plug 2 moves so that the front end of spool 2 is close to step surface again.
When needs chamber big to system carries out repairing; overload protection valve enters in right angled triangle stream 30 by opening 31 from vertical-sprue 15 is fuel-displaced; the biggest chamber is internally formed negative pressure; spring 28 is compacted to be moved back; spring 28 also drives connected nonreturn valve core 27 to move simultaneously; the front end face making nonreturn valve core 27 no longer props up another opening 32 of square stream 30; oil is flowed in the stream 26 being connected with big cavity segment 25 from opening 32; and eventually enter in big cavity segment 25, it is achieved that repairing function automatically.
The ultimate principle of the present invention and principal character and advantages of the present invention have been shown and described.Skilled person will appreciate that of the industry; the present invention is not restricted to the described embodiments; the principle that the present invention is simply described described in above-described embodiment and description; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements both fall within scope of the claimed invention.Claimed scope is defined by appending claims and equivalent thereof.
Claims (1)
1. an overload protection valve; including valve pocket, pressure regulation leading screw, pressuring adjusting valve base, locking nut, spool, spring, valve housing; the rear end of described valve pocket connects valve housing; the front end of pressuring adjusting valve base is provided with external screw thread; described pressuring adjusting valve base front end is threaded connection the rear inside being fixed on valve housing, and described pressure regulation leading screw extend into the inside of valve housing through pressuring adjusting valve base；nullIt is characterized in that: be internally provided with through horizontal run at valve pocket，Described horizontal run is made up of the thick runner at rear portion and anterior thread road，Described spool is arranged in the thick runner of valve pocket，And the front end of spool is triangle，Two faces of triangle each prop up homonymy thread road and are transformed to the step surface of thick runner，Vertical-sprue is offered in thick runner front end，Between spool and pressuring adjusting valve base，The inner side of valve housing is provided with spring，Outside described valve pocket、Outside valve housing and it is respectively arranged with sealing ring outside pressuring adjusting valve base，Described valve pocket and valve housing are processed respectively，And valve pocket rear end uses snap fit to be connected with valve housing front end，Described thread road is made up of anterior particle size stream and the thin footpath stream being connected with thick runner，The diameter 10mm of described particle size stream，The diameter 6.5mm of described thin footpath stream，The rear end of spool is provided with spring base，The front end of pressure regulation leading screw is provided with pressure regulating seat，The center of described spring base and the center of pressure regulating seat are in same level line，Spring base and pressure regulating seat are respectively equipped with boss，One end of described spring is fastened on the both sides of spring base boss，The other end of spring is fastened on the both sides of pressure regulating seat boss，The rear end of pressure regulating seat is provided with whirlpool groove，The front end of pressure regulation leading screw is provided with Surface of Sphere，Described Surface of Sphere inserts in the groove of whirlpool.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310748858.1A CN103775438B (en) | 2013-12-31 | 2013-12-31 | Overload protection valve and the overload valve containing overload protection valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310748858.1A CN103775438B (en) | 2013-12-31 | 2013-12-31 | Overload protection valve and the overload valve containing overload protection valve |
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| Publication Number | Publication Date |
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| CN103775438A CN103775438A (en) | 2014-05-07 |
| CN103775438B true CN103775438B (en) | 2016-09-14 |
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| CN201310748858.1A Active CN103775438B (en) | 2013-12-31 | 2013-12-31 | Overload protection valve and the overload valve containing overload protection valve |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653539B (en) * | 2015-03-02 | 2016-08-24 | 郑州宇通重工有限公司 | A kind of proportional hydraulic balanced valve |
| CN104989690B (en) * | 2015-06-29 | 2017-02-01 | 象山盛韵汽配科技有限公司 | Overload relief valve |
| US10794513B2 (en) * | 2018-03-02 | 2020-10-06 | Loon Llc | Overload protection valve |
| CN109177104A (en) * | 2018-09-29 | 2019-01-11 | 海天塑机集团有限公司 | A kind of protective device of motor injection seat |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2086355U (en) * | 1990-05-05 | 1991-10-09 | 德州液压机具厂 | Super high-pressure differential pressure direct overflow valve |
| DE10145975A1 (en) * | 2000-11-10 | 2002-08-29 | Mannesmann Rexroth Ag | Pilot operated pressure feed valve |
| DE10312672A1 (en) * | 2003-02-26 | 2004-09-09 | Bosch Rexroth Ag | Direct operated pressure relief valve |
| CN2672406Y (en) * | 2003-12-30 | 2005-01-19 | 徐步光 | Safety valve |
| CN201265569Y (en) * | 2007-09-18 | 2009-07-01 | 山东山工机械有限公司 | Overload control valve for work distribution valve of loader |
| CN201651419U (en) * | 2009-12-08 | 2010-11-24 | 福田雷沃国际重工股份有限公司 | Multi-way valve device |
| CN201636400U (en) * | 2009-12-11 | 2010-11-17 | 上海诺玛液压系统有限公司 | One-way overflow valve |
| CN203258127U (en) * | 2013-05-06 | 2013-10-30 | 北京华德液压工业集团有限责任公司 | Direct-acting overflow valve |
| CN203756653U (en) * | 2013-12-31 | 2014-08-06 | 江苏南铸科技股份有限公司 | Overload protection valve and overload valve containing overload protection valve |
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Effective date of registration: 20190919 Address after: 233010 Incubation Workshop, 414 Changle Road, Yuhui District, Bengbu City, Anhui Province Patentee after: Bengbu Xingshi Intellectual Property Operations Co., Ltd. Address before: 215316 Yushan, Jiangsu, Kunshan City, the town of Huan Qing Road, No. 1888, No. Patentee before: SFAM Science & Technology (Jiangsu) Co., Ltd. |
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