CN100493969C - Control valve of brake - Google Patents

Control valve of brake Download PDF

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Publication number
CN100493969C
CN100493969C CNB2006100521184A CN200610052118A CN100493969C CN 100493969 C CN100493969 C CN 100493969C CN B2006100521184 A CNB2006100521184 A CN B2006100521184A CN 200610052118 A CN200610052118 A CN 200610052118A CN 100493969 C CN100493969 C CN 100493969C
Authority
CN
China
Prior art keywords
valve
interface
spool
control cock
drg
Prior art date
Application number
CNB2006100521184A
Other languages
Chinese (zh)
Other versions
CN101092137A (en
Inventor
卢永松
李新
Original Assignee
卢永松
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 卢永松 filed Critical 卢永松
Priority to CNB2006100521184A priority Critical patent/CN100493969C/en
Publication of CN101092137A publication Critical patent/CN101092137A/en
Application granted granted Critical
Publication of CN100493969C publication Critical patent/CN100493969C/en

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Abstract

The invention relates to control valve of braking device that includes valve body, valve core and shuttle valve. The feature is that the valve core adopts two position and tee coupling valve core. One end of valve core connects to the output end of shuttle valve. The input end of shuttle interface B and C connect to hydraulic system pressure output end. The other end of spring cavity of valve core connects to oil tank. And the input interface of control valve P connects to low voltage constant pressure resource. The cavity of valve core connects to output interface A of control valve through output end. The output interface A connects to brake. Cavity of valve core connects to interface L, which connects to oil tank, through return check valve and control valve. The invention has the advantages of simple and small volume, etc.

Description

The control cock of drg

Technical field

The present invention relates to a kind of control cock of drg.

Background technology

The winch in the present domestic engineering mechanical device or the control of winch hydraulic brake adopt system pressure to control basically, see Fig. 1,2, because the influence of system back pressure, braking force weakens when making system's meta, particularly the high rotating speed of system's meta driving engine the time, system back pressure raises, cause winch or winch drg to be opened and weight is glided, and because system high pressure is at 25~28Mpa, cause the brake plunger leakage of oil easily, along with the construction machinery hydraulic system pressure rating progressively improves, and winch or winch drg withstand voltage generally all be less than 20Mpa, also need to design the drg control cock that makes new advances and solve this technical matters.

The patent No. is 01244459.6 Chinese patent " the compensation drg control cock of hoisting crane back pressure ", this control cock has a valve body, the vertical reducing valve that connects in valve body upper surface, the reducing valve both sides respectively connect a pilot operated directional control valve, the vertical two plug-in shuttle valves that connect in the bottom surface of valve body, eliminate the drg out-of-control phenomenon that system back pressure is brought owing to adopted the compensation drg control cock of back pressure, change the high pressure braking and be the low pressure braking, avoided drg to produce leakage of oil and oil impregnate because of pressure is high, it no doubt has describes such progressive meaning, but, owing to adopted two cover pilot operated directional control valves, a shuttle valve and a reducing valve certainly will cause the structure more complicated, and valve volume is not easy to dwindle, manufacturing cost requires further improvement than higher.

Summary of the invention

Technical matters to be solved by this invention provides a kind of control cock of simple and practical, cost is low, volume is little drg.

The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of control cock of drg, it includes valve body, with the spool and the shuttle valve that are installed in the valve body, it is characterized in that spool is to adopt the two-position three way spool, the one end process system input damping of spool removes to connect the mouth of shuttle valve, two input end interface B of shuttle valve remove to be connected the hydraulic system pressure mouth respectively with interface C, the other end spring cavity of spool is through valve core movement in parallel contend with damping and repairing check valve connected tank, the input interface P of control cock connects low pressure constant voltage potential source, the damping of spool cavity process mouth meets the output interface A of control cock, output interface A removes to connect drg, the spool cavity is connected with the interface L of control cock through return check valve, and interface L removes to connect fuel tank.

As improvement, above-mentioned shuttle valve is fastened on the left surface of valve body, the input end interface B of shuttle valve and input end interface C are separately positioned on the position, top and bottom of shuttle valve, be built-in with filter screen in the shuttle valve mouth cavity, it promptly makes things convenient for the installation of shuttle valve to be connected with interface, simultaneously, also make pilot operated valve device have the filter cleaning effect.

Further improve, described valve body is supported between spool and the set screw spring in the spool right-hand member spring cavity set screw that is threaded, it by set screw can setting spring pressure, be more prone to control the quality specification unification of product.

Compared with prior art, the invention has the advantages that: the structure that adopts hydraulic control two-position three way spool to combine with shuttle valve, structure is simpler, a two-position three way spool and shuttle valve have been reduced, reduced cost, assembling is produced and also is more prone to, volume also can further dwindle, also can overcome the system back pressure drg cause that raises and open phenomenon, and can come the control brake device by a low pressure constant pressure source (being generally less than 20Mpa), reduced internal leak, particularly the higher-pressure region of the pilot operated valve device of drg is sealed by the meta of its spool fully, and its two ends all are low pressure, make himself oil circuit isolate the high-voltage influence in inside and outside automatically, even internal leak is arranged, can not exert an influence to braking yet, time braking is closed more reliable thereby make system's meta, when meta, because A is interfaced to the oil return function of L interface, and the fluid of winch or winch brake piston dead space is flowed, and plays system's self-cleaning action.

Description of drawings

Fig. 1 is one of traditional braking device hydraulic schematic diagram;

Fig. 2 is one of traditional braking device hydraulic schematic diagram;

Fig. 3 is the control cock hydraulic schematic diagram (mode of operation) of drg of the present invention;

Fig. 4 is the control cock hydraulic schematic diagram (meta state) of drg of the present invention;

Fig. 5 is the control cock constructional drawing of drg of the present invention.

The specific embodiment

Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.

As Fig. 3-5 signal, the control cock of this kind drg, it includes valve body 11, with the spool 1 and the shuttle valve 3 that are installed in the valve body 11, wherein spool 1 is to adopt the two-position three way spool, one end of spool 1 removes to connect the mouth of shuttle valve 3 through system input damping 4, two input ends of shuttle valve 3 are that control cock interface B removes to be connected the hydraulic system pressure mouth respectively with interface C, the other end spring cavity 12 of spool 1 is through valve core movement in parallel contend with damping 9 and repairing check valve 8 connected tanks, the input interface P of control cock connects low pressure constant voltage potential source, the spool cavity meets the output interface A of control cock through mouth damping 5, output interface A removes to connect drg, the spool cavity is connected with the interface L of control cock through return check valve 10, and interface L removes to connect fuel tank.

Shuttle valve 3 is fastened on the left surface of valve body 11, and two input ends of shuttle valve 3 are the position, top and bottom that interface B and input end interface C are separately positioned on shuttle valve 3, is built-in with filter screen 2 in the shuttle valve 3 mouth cavitys.Valve body 11 is supported between spool 1 and the set screw 7 spring 13 in spool right-hand member spring cavity 12 set screw 7 that is threaded.Set screw 7 is lined with seal ring in trim ring 14 both sides, and compresses with nut 15.Interface A spool cavity is communicated with interface L on the valve body through return check valve 10 in the valve body 11, and, spring cavity 12 passing hole channels that the other end of spool 1 is settled spring are communicated with the damping 9 that contends with of the repairing check valve 8 of valve body lower portion and valve core movement, after the other end of damping 9 converges through the duct and repairing check valve 8 and valve core movement contend with, L is communicated with interface, simultaneously, with the hole link behind the process return check valve 10, connection interface L again.At last, the input interface P of control cock is on valve body, and interface L is below valve body, and interface A makes an integrated form independence single-piece hydraulic package in the front of valve body, the convenient use.Certainly mouth damping 5 is arranged on input interface P and can plays the similar techniques effect.

Its principle of work is such, and at first, when system connect control cock interface B and C pressure smaller or equal to spring force, interface A was communicated with interface L, and the interface P that connects the low pressure constant pressure source is sealed by spool 1, and drg is in closed condition at this moment; Then, when system pressure is imported by interface B or C, when pressure is higher than the spring pressure of setting by set screw 7, spool 1 is pushed to the right, at this moment, under the effect of input end damping 4, spool 1 easy motion, and repairing this moment check valve 8 is closed, spring cavity in-to-in hydraulic oil can only lead to oil return by the damping 9 that contends with, therefore, and when spool 1 is opened, the damping at its two ends acts on simultaneously, and that has both realized spool opens function slowly; Rising along with system pressure, spool 1 complete compression spring, interface A oil pocket and interface L are closed fully, simultaneously, the constant oil sources of interface P is communicated with fully with interface A, constant oil sources is steadily opened drg by mouth damping 5, and is last, when system pressure weakens to the spring pressure less than setting through interface B or C, spool 1 begins to close, repairing this moment check valve 8 opens and to the spring cavity repairing, the damping 9 that contends with of spring cavity is ineffective, and spool is closed, have only input end damping 4 to work this moment, therefore spool is realized quick closedown, and interface P and interface A are cut off, and the pressure oil of interface A is steadily closed drg by mouth damping 5.Hydraulic control mouth filter screen makes the cleanliness of hydraulic oil that enters spool, prevent the card valve, the effect of shuttle valve is a selective system pressure, set screw 7 is owing to the hydraulic control spool is opened in the influence of back pressure when adjusting spring force with assurance system meta, thereby cause the meta drg to be opened, repairing check valve 8 prevents that spring cavity from producing vacuum when spool is replied.

Claims (5)

1. the control cock of a drg, it includes valve body, with the spool and the shuttle valve that are installed in the valve body, it is characterized in that spool is to adopt the two-position three way spool, the one end process system input damping of spool removes to connect the mouth of shuttle valve, two input end interface B of shuttle valve remove to be connected the hydraulic system pressure mouth respectively with interface C, the other end spring cavity of spool is through valve core movement in parallel contend with damping and repairing check valve connected tank, the input interface P of control cock connects low pressure constant voltage potential source, the damping of spool cavity process mouth meets the output interface A of control cock, output interface A removes to connect drg, the spool cavity is connected with the interface L of control cock through return check valve, and interface L removes to connect fuel tank.
2. the control cock of drg according to claim 1, it is characterized in that described shuttle valve is fastened on the left surface of valve body, the input end interface B of shuttle valve and input end interface C are separately positioned on the position, top and bottom of shuttle valve, are built-in with filter screen in the shuttle valve mouth cavity.
3. the control cock of drg according to claim 1 and 2 is characterized in that described valve body in the spool right-hand member spring cavity set screw that is threaded, is supported between spool and the set screw spring.
4. the control cock of drg according to claim 3 is characterized in that described set screw is lined with seal ring in the trim ring both sides, and compresses with nut.
5. the control cock of drg according to claim 3 is characterized in that described input interface P on valve body, and interface L is below valve body, and interface A is in the front of valve body.
CNB2006100521184A 2006-06-23 2006-06-23 Control valve of brake CN100493969C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2006100521184A CN100493969C (en) 2006-06-23 2006-06-23 Control valve of brake

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB2006100521184A CN100493969C (en) 2006-06-23 2006-06-23 Control valve of brake

Publications (2)

Publication Number Publication Date
CN101092137A CN101092137A (en) 2007-12-26
CN100493969C true CN100493969C (en) 2009-06-03

Family

ID=38990629

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB2006100521184A CN100493969C (en) 2006-06-23 2006-06-23 Control valve of brake

Country Status (1)

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CN (1) CN100493969C (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101629588B (en) * 2009-06-01 2011-11-09 中国航空工业集团公司西安飞机设计研究所 Liquid control valve with double control ports
CN101922477B (en) * 2009-06-09 2013-02-06 上海立新液压有限公司 Pressure-compensated valve
CN102785656B (en) * 2012-09-05 2015-06-10 湖南明鼎科技有限公司 Air valve for use in track traction driver brake controller system and control method of air valve
CN102889398B (en) * 2012-10-12 2014-04-30 常德中联重科液压有限公司 Shuttle valve, shuttle valve driving type device, winding drum brake cylinder control loop and crane
CN103641023B (en) * 2013-12-17 2016-04-27 徐州重型机械有限公司 The hydraulic control system of control cock and hoist brake, hoisting crane
CN106015147B (en) * 2016-07-28 2017-12-15 安徽环球传动科技有限公司 A kind of shuttle valve with middle position unloading function and fluid motor-driven brakes
CN108061070B (en) * 2017-12-19 2019-11-26 江苏佳佩环保机械设备有限公司 A kind of pressure-control valve
CN108266420B (en) * 2018-01-19 2020-11-17 江苏天佑液压科技有限公司 Plug-in type brake control valve
CN108050121B (en) * 2018-01-19 2020-05-22 邹城市三洋机械有限公司 Hydraulic control system of plug-in type control valve and winch brake

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Publication number Publication date
CN101092137A (en) 2007-12-26

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Date Code Title Description
C06 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
GR01 Patent grant
C14 Grant of patent or utility model
EE01 Entry into force of recordation of patent licensing contract

Assignee: Ningbo Jiangbei Yuzhou Hydraulic Equipment Factory

Assignor: Lu Yongsong

Contract record no.: 2011330000288

Denomination of invention: Control valve of brake

Granted publication date: 20090603

License type: Exclusive License

Open date: 20071226

Record date: 20110415

TR01 Transfer of patent right

Effective date of registration: 20110708

Address after: Jiangbei District in Zhejiang province 315021 Hing Ningbo Yonglu No. 98

Patentee after: Ningbo Jiangbei Yuzhou Hydraulic Equipment Factory

Address before: 315211 Ningbo Jiangbei Zhejiang Kongura Rika Ningbo Jiangbei hydraulic equipment factory

Patentee before: Lu Yongsong

COR Change of bibliographic data

Free format text: CORRECT: ADDRESS; FROM: 315211 NINGBO YUZHOU HYDRAULIC EQUIPMENT FACTORY, KONGPULI, JIANGBEI, NINGBO CITY, ZHEJIANG PROVINCE TO: 315021 NO. 98, XINGYONG ROAD, JIANGBEI DISTRICT, NINGBO CITY, ZHEJIANG PROVINCE

C41 Transfer of patent application or patent right or utility model
ASS Succession or assignment of patent right

Owner name: NINGBO JIANGBEI YUZHOU HYDRAULIC EQUIPMENT FACTORY

Free format text: FORMER OWNER: LU YONGSONG

Effective date: 20110708

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20090603

Termination date: 20180623