CN103775438A - Overload protective valve and overload valve comprising same - Google Patents
Overload protective valve and overload valve comprising same Download PDFInfo
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- CN103775438A CN103775438A CN201310748858.1A CN201310748858A CN103775438A CN 103775438 A CN103775438 A CN 103775438A CN 201310748858 A CN201310748858 A CN 201310748858A CN 103775438 A CN103775438 A CN 103775438A
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Abstract
The invention discloses an overload protective valve and an overload valve comprising the overload protective valve and relates to the technical field of engineering machinery. The overload protective valve comprises a valve sleeve and a pressure-regulating lead screw. The overload protective valve is characterized in that the rear end of the valve sleeve is connected with a valve sleeve base, the front end of a pressure-regulating valve seat is provided with external threads, the front end of the pressure-regulating valve seat is connected and fixed to the inner side of the rear end of the valve sleeve seat through the threads, and the pressure-regulating lead screw penetrates through the pressure-regulating valve seat to extend into the valve sleeve seat; a spring is arranged on the inner side of the valve sleeve seat between a valve element and the pressure-regulating valve seat. The overload protective valve aims to solve the problems that in the prior art, when an overload relief valve operates, the overflowing speed is low or operation fails, so that a controlled component is damaged, and the problem that the overload relief valve cannot replenish oil to a large cavity of the system, so that oil replenishment needs external assistance and the enterprise cost is increased is solved at the same time. The overload protective valve has the advantages of being simple in structure, good in opening and closing performance, high in overflowing speed, long in service life, capable of conducting oil replenishment work and the like. The invention further provides the overload valve comprising the overload protective valve.
Description
Technical field
The present invention relates to technical field of engineering machinery, the overload valve that particularly relates to a kind of overload protection valve and contain overload protection valve.
Background technique
Hydrovalve is a kind of Automation Elements with pressure oil operation, and it is subject to the control of voltage distribution valve pressure oil, conventionally and electromagnetic distributing valve be used in combination, can be used for the break-make of distant control water power plant oil, gas, water piping system.What be wherein used for pilot pressure is called again pressure controlled valve, and the relief valve in pressure controlled valve is can control hydraulic system in the time reaching set pressure, to keep constant state.Wherein be called overload relief valve with the relief valve of what overload protection.When system breaks down, when pressure is elevated to the limit value that may damage, the valve port of overload relief valve can be opened and overflow, to guarantee the safety of system.But the flooding velocity of current relief valve is slower, and start-stop performance is poor, cannot reach the object of fast and stable overflow, may cause by the damage of controlling component, bring larger economic loss.Adopt opening of spring mode control valve, because spring set-up mode is reasonable not, the situation of the twisting that is easy to bend, causes overload relief valve can not use in the time that needs are worked simultaneously.General overload relief valve does not have repairing function in addition, need to be to the repairing of the large chamber of system time, carry out repairing by engine control mailbox, has caused the consumption of the energy, has improved the cost of enterprise.
Summary of the invention
While carrying safety valve work in order to solve in prior art, flooding velocity maybe cannot be worked slowly, causes being damaged by controlling component, has brought larger economic loss and the problem of security incident occurs.Do not have to the function of system large chamber repairing in order to solve overload relief valve, thereby need the extraneous auxiliary repairing of carrying out, consume the energy, improve the problem of entreprise cost simultaneously yet.The invention provides a kind of have simple in structure, start-stop performance good, flooding velocity is fast, long service life, can carry out the overload protection valve of the advantages such as repairing work and the overload valve that contains 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, comprise valve pocket, pressure regulation leading screw, pressuring adjusting valve base, locking nut, it is characterized in that: also comprise spool, spring, valve housing, the rear end of described valve pocket is connected with valve housing, front end at pressuring adjusting valve base is provided with outside thread, described pressuring adjusting valve base front end is threaded connection the rear inside that is fixed on valve housing, and described pressure regulation leading screw extend into the inside of valve housing through pressuring adjusting valve base; Be provided with the horizontal run of perforation in the inside of 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, leg-of-mutton two faces prop up homonymy thread road and are transformed to the step surface of thick runner separately, offer vertical-sprue at 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, is characterized in that: described valve pocket outside, valve housing outside and pressuring adjusting valve base outside are respectively arranged with seal ring.
Aforesaid a kind of overload protection valve, is characterized in that: described valve pocket and valve housing are processed respectively, and valve pocket rear end adopts snapping mode to be connected with valve housing front end.
Aforesaid a kind of overload protection valve, is characterized in that: described thread road is made up of with the thin footpath stream being connected with thick runner anterior particle size stream.
Aforesaid a kind of overload protection valve, is characterized 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 at spool is provided with spring seat; front end at pressure regulation leading screw is provided with pressure regulating seat; the center of described spring seat and the center of pressure regulating seat are in same level line; on spring seat and pressure regulating seat, be respectively equipped with boss; one end of described spring is fastened on the both sides of spring seat 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, is characterized in that: be provided with whirlpool groove in the rear end of pressure regulating seat, be provided with Surface of Sphere at the front end of pressure regulation leading screw, described Surface of Sphere inserts in the groove of whirlpool.
A kind of overload valve that contains overload protection valve, comprise overload valve valve body, be provided with overload protection valve at overload valve valve inner, be provided with large cavity segment in the rear end of overload protection valve, on the stream being connected with large cavity segment, be provided with nonreturn valve core, described nonreturn valve core is flexibly connected with the location plug screw that is arranged on its rear end by spring, be provided with right angle type stream at valve inner, the vertical-sprue of described overload protection valve connects and is connected with an opening of right angle type stream, the stream that described and large cavity segment is connected is connected with another opening of right angle type stream, and the front-end face of nonreturn valve core props up another opening of right angle type stream.
The invention has the beneficial effects as follows:
1, the present invention realizes the overflow object of overload protection valve by the motion in valve pocket of spool; thread road is made up of with the thin footpath stream being connected with thick runner anterior particle size stream; by original thin and long thread pipe chap; reduce the resistance of oil excessively; accelerate from the oil-feed speed to overload protection valve in the large chamber of system; start-stop performance improves; can realize the control of quick-make; control external system sensitivity higher; improve the working efficiency of external system, also avoided the damage of external system.
2, the present invention utilizes the Surface of Sphere of pressure regulation leading screw to insert in the whirlpool groove of pressure regulating seat to be locked, having guaranteed that pressure regulating seat is stable can be eccentric, spring is arranged fixing by the boss of spring seat and the cooperation of the boss of pressure regulating seat simultaneously, guarantee the concentricity of spring, spring there will not be the situation of bending twisting to occur in the time of work like this, guarantee the normal work of overload relief valve, also extended the working life of whole overload relief valve.
3, valve pocket of the present invention and valve housing are processed respectively, then adopt snapping mode to be connected valve pocket rear end and valve housing front end, have so greatly accelerated both processing speeies, and machining accuracy is also higher with respect to entirety processing.
4, overload valve of the present invention also has repairing function; utilize overload protection valve to fuel feeding in right angle type stream, and now the large chamber of system is inner because oil starvation forms negative pressure, drives spring compression; make nonreturn valve core leave the opening of stream, oil can be realized repairing from flowing into inside, large chamber in opening.
Accompanying drawing explanation
Fig. 1 is overload protection valve arrangement schematic diagram of the present invention;
Fig. 2 is valve pocket structural representation 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 of the present invention's overload valve of containing overload protection valve.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in the figure; a kind of overload protection valve; comprise 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; there is seal ring 7, have seal ring 10 in valve housing 3 arranged outside in valve pocket 1 arranged outside, have seal ring 12 in pressuring adjusting valve base 5 arranged outside.Be connected with valve housing 3 in the rear end of valve pocket 1, in order to improve both processing speed and machining accuracy, valve pocket 1 and valve housing 3 are processed respectively, and valve pocket 1 rear end adopts snapping mode to be connected with valve housing 3 front ends.Front end at pressuring adjusting valve base 5 is provided with outside thread, and pressuring adjusting valve base 5 is matched and is fixedly connected with valve housing 3 rear end internal threads by front end outside 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.
Be provided with the horizontal run of perforation in the inside of valve pocket 1, horizontal run is made up of the thick runner 13 at rear portion and anterior thread road 14, in order to accelerate the flowing velocity of oil in thread road 14, reduced oily resistance, improve start-stop performance, it is long-pending that pasta is crossed in the thread road 14 that can increase, thread road 1 comprises anterior particle size stream 17 and the thin footpath stream 16 being connected with thick runner 13, the diameter 10mm of particle size stream when design, the diameter 6.5mm of thin footpath stream, so greatly improve the mistake oil mass in thread road 14, accelerated flooding velocity.
Simultaneously in order to realize the repairing function of overload protection valve to the large chamber of system, overload valve is set, comprise overload valve valve body 23, be provided with overload protection valve 24 in overload valve valve body 23 inside, be provided with large cavity segment 25 in the rear end of overload protection valve 24, on the stream 26 being connected with large cavity segment 25, be provided with nonreturn valve core 27, nonreturn valve core 27 is flexibly connected with the location plug screw 29 that is arranged on its rear end by spring 28, be provided with right angle type stream 30 in valve body 23 inside, the vertical-sprue 15 of overload protection valve 24 connects and is connected with an opening 31 of right angle type stream 30, the stream 26 being connected with large cavity segment 25 is connected with another opening 32 of right angle type stream 30, and the front-end face of nonreturn valve core 27 props up another opening 32 of right angle type stream 30.
In the time that Overload Protection is carried out in needs overflow; be that system internal pressure is while exceeding overload protection valve setting pressure; large cavity segment 25 is to thread road 14 oil-feeds of overload protection valve 24; in the time that the pressure of oil-feed overcomes the elastic force of spring 9; spring 9 is compacted; band movable valve plug 2 moves; front end and the step surface of spool 2 are separated; oil flow in the thick runner 13 of overload protection valve 24 like this; and the vertical-sprue 15 of offering from thick runner 13 front ends flows out and enter in right-angled triangle stream 30, and finally get back to fuel tank.In the time not carrying out overload protection, spring 9 resets, and band movable valve plug 2 moves, and makes the front end of spool 2 again be close to step surface.
In the time that needs carry out repairing to the large chamber of system; overload protection valve enters in right-angled triangle stream 30 by opening 31 from vertical-sprue 15 is fuel-displaced; at this moment the inner negative pressure that forms in large chamber; spring 28 is compacted to be moved back; spring 28 also drives connected nonreturn valve core 27 to move simultaneously; make the front-end face of nonreturn valve core 27 no longer prop up another opening 32 of right angle type stream 30; oil flow in the stream 26 being connected with large cavity segment 25 from opening 32; and finally enter in large cavity segment 25, realize automatic makeup functional oil.
Show and described basic principle of the present invention and major character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present invention; 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 all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (8)
1. an overload protection valve, comprise valve pocket, pressure regulation leading screw, pressuring adjusting valve base, locking nut, it is characterized in that: also comprise spool, spring, valve housing, the rear end of described valve pocket is connected with valve housing, front end at pressuring adjusting valve base is provided with outside thread, described pressuring adjusting valve base front end is threaded connection the rear inside that is fixed on valve housing, and described pressure regulation leading screw extend into the inside of valve housing through pressuring adjusting valve base; Be provided with the horizontal run of perforation in the inside of 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, leg-of-mutton two faces prop up homonymy thread road and are transformed to the step surface of thick runner separately, offer vertical-sprue at thick runner front end, between spool and pressuring adjusting valve base, the inner side of valve housing is provided with spring.
2. a kind of overload protection valve according to claim 1, is characterized in that: described valve pocket outside, valve housing outside and pressuring adjusting valve base outside are respectively arranged with seal ring.
3. a kind of overload protection valve according to claim 2, is characterized in that: described valve pocket and valve housing are processed respectively, and valve pocket rear end adopts snapping mode to be connected with valve housing front end.
4. a kind of overload protection valve according to claim 3, is characterized in that: described thread road is made up of with the thin footpath stream being connected with thick runner anterior particle size stream.
5. a kind of overload protection valve according to claim 4, is characterized in that: the diameter 10mm of described particle size stream, the diameter 6.5mm of described thin footpath stream.
6. a kind of overload protection valve according to claim 5; it is characterized in that: the rear end at spool is provided with spring seat; front end at pressure regulation leading screw is provided with pressure regulating seat; the center of described spring seat and the center of pressure regulating seat are in same level line; on spring seat and pressure regulating seat, be respectively equipped with boss; one end of described spring is fastened on the both sides of spring seat boss, and the other end of spring is fastened on the both sides of pressure regulating seat boss.
7. a kind of overload protection valve according to claim 6, is characterized in that: be provided with whirlpool groove in the rear end of pressure regulating seat, be provided with Surface of Sphere at the front end of pressure regulation leading screw, described Surface of Sphere inserts in the groove of whirlpool.
8. an overload valve that contains overload protection valve, comprise overload valve valve body, be provided with overload protection valve at overload valve valve inner, be provided with large cavity segment in the rear end of overload protection valve, on the stream being connected with large cavity segment, be provided with nonreturn valve core, described nonreturn valve core is flexibly connected with the location plug screw that is arranged on its rear end by spring, be provided with right angle type stream at valve inner, the vertical-sprue of described overload protection valve connects and is connected with an opening of right angle type stream, the stream that described and large cavity segment is connected is connected with another opening of right angle type stream, and the front-end face of nonreturn valve core props up another opening of right angle type stream.
Priority Applications (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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| 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 true CN103775438A (en) | 2014-05-07 |
| CN103775438B 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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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653539A (en) * | 2015-03-02 | 2015-05-27 | 郑州宇通重工有限公司 | Proportional hydraulically balanced valve |
| CN104989690A (en) * | 2015-06-29 | 2015-10-21 | 象山盛韵汽配科技有限公司 | Overload relief 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 |
| CN111868424A (en) * | 2018-03-02 | 2020-10-30 | 洛昂有限责任公司 | Overload protection valve |
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| 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 |
| CN2672406Y (en) * | 2003-12-30 | 2005-01-19 | 徐步光 | Safety valve |
| CN1756917A (en) * | 2003-02-26 | 2006-04-05 | 博世力士乐股份有限公司 | Directly controlled pressure control 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 |
| CN201636400U (en) * | 2009-12-11 | 2010-11-17 | 上海诺玛液压***有限公司 | One-way overflow valve |
| 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 |
| 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 |
-
2013
- 2013-12-31 CN CN201310748858.1A patent/CN103775438B/en active Active
Patent Citations (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 |
| CN1756917A (en) * | 2003-02-26 | 2006-04-05 | 博世力士乐股份有限公司 | Directly controlled pressure control 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***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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653539A (en) * | 2015-03-02 | 2015-05-27 | 郑州宇通重工有限公司 | Proportional hydraulically balanced valve |
| CN104989690A (en) * | 2015-06-29 | 2015-10-21 | 象山盛韵汽配科技有限公司 | Overload relief valve |
| CN111868424A (en) * | 2018-03-02 | 2020-10-30 | 洛昂有限责任公司 | 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103775438B (en) | 2016-09-14 |
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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. |