CN203374967U - Remote control overflow valve - Google Patents

Remote control overflow valve Download PDF

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Publication number
CN203374967U
CN203374967U CN201320421302.7U CN201320421302U CN203374967U CN 203374967 U CN203374967 U CN 203374967U CN 201320421302 U CN201320421302 U CN 201320421302U CN 203374967 U CN203374967 U CN 203374967U
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CN
China
Prior art keywords
valve
valve seat
spool
hole
spring
Prior art date
Application number
CN201320421302.7U
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Chinese (zh)
Inventor
董威
Original Assignee
宁波海宏液压有限公司
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.)
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Publication date
Application filed by 宁波海宏液压有限公司 filed Critical 宁波海宏液压有限公司
Priority to CN201320421302.7U priority Critical patent/CN203374967U/en
Application granted granted Critical
Publication of CN203374967U publication Critical patent/CN203374967U/en

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Abstract

The utility model relates to an overflow valve, in particular to a remote control overflow valve which comprises a valve seat and a valve sleeve. An oil drain port is formed in the valve seat, a pressure adjusting screw is arranged at the bottom of the valve seat, the tail of the pressure adjusting screw is exposed of the valve seat, the pressure adjusting screw is provided with a first spring, and the other end of the first spring is connected with a guide valve. A guide valve seat is arranged in the valve seat, a first oil drain hole is formed in the guide valve seat, the guide valve butts against the first oil drain hole, and the valve sleeve is arranged on the valve seat. The valve sleeve is provided with an oil inlet, an oil outlet and a control opening, a valve element is arranged in the valve sleeve, a second spring is arranged on the guide valve seat, the other end of the second spring is connected with the valve element, and the valve element is provided with a second oil drain hole. Compared with the prior art, the remote control overflow valve is simple in structure, convenient to operate, long in service life, and capable of being applied to various severe environments flexibly. The remote control overflow valve further can adjust pressure of the guide valve by manpower, meanwhile a limit device can prevent maloperation in manual pressure adjustment, and a filter net is arranged in an oil path channel to prevent impurities from entering an oil path and damaging internal mechanisms of the remote control overflow valve when the outdoor environment is severe.

Description

A kind of remote-control relief valve
Technical field
The utility model relates to a kind of relief valve, relates in particular to a kind of remote-control relief valve.
Background technique
Relief valve is a kind of hydraulic control valve commonly used in hydraulic system, and it can be used for controlling on main oil way of hydraulic system the maximum pressure of hydraulic system, also can be for the working oil path of certain hydraulic actuator, to control the working pressure of this actuator.Relief valve mainly is divided into direct-acting overflow valve and pilot operated compound relief valve.For the sake of security, in most of hydraulic systems of engineering machinery, the relief valve with the remote control mouth all is installed, generally by the hydraulic oil pressure of electromagnetic valve remote control mouth.For example, the arm of truck crane is with respect to the horizontal plane when less angle, and arm position of centre of gravity and pivoting support centre distance are far away, and hoist is to the arm direction trend grow that topples.If operator carry out the luffing operation; when the angle of arm direction and horizontal plane is less than setting value and is dangerous; controller can send the remote control mouth decompression of secondary relief valve that electrical signal makes the corresponding filler opening of luffing selector valve, and then makes the secondary relief valve realize the safety protection effect in unloading condition.But the relief valve that can play Unloading Effect with the remote control mouth is all pilot operated compound relief valve usually, the structure of pilot operated compound relief valve is comparatively complicated, and processing cost is higher, and can there be certain retardation phenomenon in speed of response simultaneously.
Summary of the invention
The utility model, for deficiency of the prior art, provides a kind of remote-control relief valve, and the utility model is simple in structure, easy to operate, long service life, and the energy flexible Application is in various rugged environment.Also have and manually carry out the pressure controlled function of pilot valve, also there is limit stoper simultaneously and prevent artificial pressure regulation misoperation.And be provided with filter screen in asphalt channel, while preventing that outdoor environment is severe, impurity enters oil circuit and damages the remote-control relief valve internal mechanism.
In order to solve the problems of the technologies described above, the utility model is solved by following technical proposals: a kind of remote-control relief valve, comprise valve seat, valve pocket, be provided with drain tap on described valve seat, described valve seat bottom is provided with pressure regulating screw, described pressure regulating screw afterbody exposes outside described valve seat, be provided with the first spring on described pressure regulating screw, the described first spring the other end is connected with pilot valve, be provided with guide valve seat in described valve seat, be provided with the first oil leaking hole on described guide valve seat, described pilot valve props up described first oil leaking hole, be connected with described valve pocket on described valve seat, be provided with oiler on described valve pocket, oil outlet and control mouthful, be provided with spool in described valve pocket, be provided with the second spring on described guide valve seat, the described second spring the other end is connected with spool, be provided with the second oil leaking hole on described spool.Arrange like this, be provided with oiler, oil outlet and control mouth on valve pocket, control on mouth control valve is housed.Spool closely abuts in valve pocket, and the sealing of maintenance and valve sleeving inner wall, covers in oil outlet during the spool original state, and spool and guide valve seat directly are provided with spring, and when spool is under pressure, spool can move and make oiler identical with oil outlet.Spool and guide valve seat all are provided with oil leaking hole, first oil leaking hole on guide valve seat is propped up by pilot valve, controlling mouth is arranged between spool and guide valve seat, like this when oiler enters oil generation pressure, the pressure that pilot valve is subject to is that oiler pressure deducts the difference of controlling mouth pressure, can change by the control valve remote-control pressure, make the low pressure valve can sensitive control high-voltage oil liquid.There is pressure regulating screw, the initial elastic force that can allow staff's manual control pilot valve in different environment be subject to simultaneously.Also be provided with drain tap on valve seat, the fluid flowed in valve seat through pilot valve is discharged.
In technique scheme, preferred, described guide valve seat is fixedly installed in described valve seat, is provided with the first block plate on described guide valve seat, and described guide valve seat bottom is provided with the first large through-hole, and described first large through-hole is communicated with described first oil leaking hole.Arrange like this, the guide valve seat bottom is provided with the first large through-hole can make pilot valve prop up the first large through-hole easily.
In technique scheme, preferred, described pilot valve is tapered, and described pilot valve end face is arc transition, is provided with the second block plate on described pilot valve, and described pilot valve top props up described first large through-hole.Arrange like this, pilot valve is tapered, and end face is arc transition, and in the time of making pilot valve prop up large through-hole, sealing effect is good.
In technique scheme, preferred, described pressure regulating screw inner hollow groove, described pressure regulating screw inner hollow groove, described first spring is arranged in described pressure regulating screw medium altitude groove, and the described first spring the other end is connected with described second block plate.Be provided with annular groove in described valve seat, described pressure regulating screw outer wall is provided with annular protrusion, and described annular groove width is greater than described annular protrusion width.
In technique scheme, preferred, be provided with limiting stopper on described annular groove.Arrange like this, be provided with between pressure regulating screw and valve seat on annular protrusion and annular groove, be provided with the movement that limiting stopper can limit annular protrusion on annular groove, prevent the manual tune error.
In technique scheme, preferred, be provided with little groove on described annular protrusion, be provided with O shape circle in described little groove.Arrange like this, prevent leakage of oil between valve seat and pressure regulating screw.
In technique scheme, preferably, described spool is provided with medium altitude groove, be provided with the second spring on described first block plate, the described second spring the other end is arranged in described spool medium altitude groove, be provided with the third through hole on described spool outer wall, described the third through hole one end is connected with described spool medium altitude groove, and the other end is communicated with controls mouth.Arrange like this, control and mouthful by the third through hole, be communicated with spool and guide valve seat, can form relative pressure with oiler, thereby regulate pressure that pilot valve is subject to, make the low pressure valve can sensitive control high-voltage oil liquid.
In technique scheme, preferred, be provided with the second large through-hole on described spool, be provided with filter screen on described second large through-hole, described second large through-hole is communicated with described second oil leaking hole.Arrange like this, on the second large through-hole, be provided with filter screen prevent machine in rugged environment, enter sand and dust cause spool or other motion parts stuck.
In technique scheme, preferred, be provided with several balancing slits on described spool outer wall.Arrange like this, energy anti-skidding spool is stuck in movement.
In technique scheme, preferred, be provided with circular cone in described valve pocket, described circular cone is arranged on described oil outlet top, and described spool top is provided with the conical surface fitted tightly mutually with described circular cone.Arrange like this, adopt the conical surface structure that reclines effectively to solve the slide valve type long-term work and strengthen because wearing and tearing cause gap the leakage caused, thereby improve the energy consumption of system.
Compared with prior art, the beneficial effects of the utility model are: simple in structure, easy to operate, and long service life, the energy flexible Application is in various rugged environment.Also have and manually carry out the pressure controlled function of pilot valve, also there is limit stoper simultaneously and prevent artificial pressure regulation misoperation.And be provided with filter screen in asphalt channel, while preventing that outdoor environment is severe, impurity enters oil circuit and damages the remote-control relief valve internal mechanism.
The accompanying drawing explanation
Fig. 1 is the utility model cross-sectional schematic.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
Shown in Figure 1, a kind of remote-control relief valve, comprise valve seat 1, valve pocket 2, and valve pocket 2 is used thread connecting mode with valve seat 1.Be provided with pressure regulating screw 10 in valve seat 1, pressure regulating screw 10 is connected with valve seat 1 inner thread, and pressure regulating screw 10 afterbodys expose outside valve seat 1, also is provided with nut 26 outside valve seat 1 and is connected with pressure regulating screw 10.Valve seat 1 is provided with an annular groove 13 with the wall that contacts of pressure regulating screw 10, answer in contrast pressure regulating screw 10 surfaces to be provided with an annular protrusion 14, annular groove 13 width are greater than annular protrusion 14 width, and when pressure regulating screw 10, at valve seat 1, interior annular protrusion 14 can be in the interior slip of annular groove 13 when mobile.Be provided with O shape circle 16 on annular protrusion 14, prevent the fluid leakage.Be provided with limiting stopper 15 on annular groove 13, limiting stopper 15 can block the slip of annular protrusion 14 on annular groove 13.Hollow in the middle of pressure regulating screw 10, middle vacancy is provided with first spring 12, and first spring 12 tops prop up the second block plate 20 on pilot valve 9.Pilot valve 9 is tapered, and pilot valve 9 end faces are set to arc transition.Pilot valve 9 tops prop up the first large through-hole 18 on guide valve seat 8, and guide valve seat 8 is fixedly installed in valve seat 1.Be provided with drain tap 6 on valve seat 1, drain tap 6 is arranged on guide valve seat 8 belows.
Valve pocket 2 tops are oilers 3, be provided with the spool 7 fitted tightly in valve pocket 2, be provided with several balancing slits 25 on spool 7, be provided with circular cone 27 in valve pocket 2, circular cone 27 belows are provided with oil outlet 4, and spool 7 tops are provided with the conical surface fitted tightly mutually with circular cone 27.Spool 7 hollows, spool 7 tops also are provided with second large through-hole 22, are provided with filter screen 23 in second large through-hole 22, and the second large through-hole is connected with second oil leaking hole 24 22 times, by second large through-hole 22 and second oil leaking hole 24 oilers 3, with guide valve seat 8, with the space between spool 7, is communicated with; Be provided with on valve pocket 2 and control mouth 5, control mouth 5 and be communicated with the space between guide valve seat 8 and spool 7 by the third through hole 21 be arranged on spool 7.Guide valve seat 8 comprises first block plate 19, and second spring 11 is set on first block plate 19, and second spring 11 tops prop up in spool 7 hollows.Be provided with first oil leaking hole 17 on guide valve seat 8, first oil leaking hole 17 is communicated with first large through-hole 18, by first oil leaking hole 17 and first large through-hole 18, makes drain tap 6 be communicated with the space between guide valve seat 8 and spool 7.
The utility model working principle is: block oil outlet 4 at original state spool 7, it is not communicated with oiler 3.Pilot valve 9 is blocked the first large through-hole 18 on guide valve seat 8, makes oil outlet 4 and control mouth 5 with drain tap 6, not to be communicated with.When oiler 3 is fuel-displaced, the pressure of oiler 3 raises, and pressure retreats spool 7, and oil outlet 4 is communicated with oiler 3, and at this moment under the effect of pressure, pilot valve 9 leaves first large through-hole 18, carries out pressure release, makes internal and external pressure balance.Control mouth 5 and can be communicated with external control valve, under the effect of external control valve, controlling mouth 5 can be fuel-displaced, at this moment the pressure that the pressure that pilot valve 9 is subject to is oiler 3 deducts the difference of the pressure of controlling mouth 5, thereby control the suffered pressure of spool 7, regulate the discharge value between oiler 3 and oil outlet 4.The unnecessary fluid from oil outlet 3 and control mouthful 5 interior inflow valve seat 1 inner cavities can flow out from drain tap 6.After oiler 3 fluid have flowed pressure drop, under the effect of first spring 12 and second spring 11, pilot valve 9 and spool 7 are from newly resetting.On second large through-hole 22, be provided with filter screen 23 prevent machine in rugged environment, enter sand and dust cause spool 7 or other motion parts stuck.The staff can externally regulate the pressure of 9 pairs of first large through-holes 18 of pilot valve by pressure regulating screw 10, make the utility model can be applied to varying environment.Be provided with error prevention device limiting stopper 15 simultaneously and can limit pressure regulating screw 10 and move, prevent the manual tune error, when pressure is too high, fluid ejects.

Claims (10)

1. a remote-control relief valve, comprise valve seat (1), valve pocket (2), it is characterized by, be provided with drain tap (6) on described valve seat (1), described valve seat (1) bottom is provided with pressure regulating screw (10), described pressure regulating screw (10) afterbody exposes outside described valve seat (1), be provided with first spring (12) on described pressure regulating screw (10), described first spring (12) the other end is connected with pilot valve (9), be provided with guide valve seat (8) in described valve seat (1), be provided with first oil leaking hole (17) on described guide valve seat (8), described pilot valve (9) props up described first oil leaking hole (17), be connected with described valve pocket (2) on described valve seat (1), be provided with oiler (3) on described valve pocket (2), oil outlet (4) and control mouthful (5), be provided with spool (7) in described valve pocket (2), be provided with second spring (11) on described guide valve seat (8), described second spring (11) the other end is connected with spool (7), be provided with second oil leaking hole (24) on described spool (7).
2. a kind of remote-control relief valve according to claim 1, it is characterized by, described guide valve seat (8) is fixedly installed in described valve seat (1), be provided with first block plate (20) on described guide valve seat (8), described guide valve seat (8) bottom is provided with first large through-hole (18), and described first large through-hole (18) is communicated with described first oil leaking hole (17).
3. a kind of remote-control relief valve according to claim 2, it is characterized by, described pilot valve (9) is tapered, and described pilot valve (9) end face is arc transition, be provided with second block plate (20) on described pilot valve (9), described pilot valve (9) top props up described first large through-hole (18).
4. a kind of remote-control relief valve according to claim 3, it is characterized by, described pressure regulating screw (10) inner hollow groove, described first spring (12) is arranged in described pressure regulating screw (10) medium altitude groove, described first spring (12) the other end is connected with described second block plate (20), be provided with annular groove (13) in described valve seat (1), described pressure regulating screw (10) outer wall is provided with annular protrusion (14), and described annular groove (13) width is greater than described annular protrusion (14) width.
5. a kind of remote-control relief valve according to claim 4, is characterized by, and is provided with limiting stopper (15) on described annular groove (13).
6. a kind of remote-control relief valve according to claim 4, is characterized by, and described annular protrusion is provided with little groove on (14), is provided with O shape circle (16) in described little groove.
7. a kind of remote-control relief valve according to claim 2, it is characterized by, described spool (7) is provided with medium altitude groove, be provided with second spring (11) on described first block plate (19), described second spring (11) the other end is arranged in described spool (7) medium altitude groove, be provided with the third through hole (21) on described spool (7) outer wall, described the third through hole (21) one ends are connected with described spool (7) medium altitude groove, and the other end is communicated with controls mouthful (5).
8. a kind of remote-control relief valve according to claim 7, it is characterized by, be provided with second large through-hole (22) on described spool (7), be provided with filter screen (23) on described second large through-hole (22), described second large through-hole (22) is communicated with described second oil leaking hole (24).
9. a kind of remote-control relief valve according to claim 1, is characterized by, and on described spool (7) outer wall, is provided with several balancing slits (25).
10. a kind of remote-control relief valve according to claim 1, it is characterized by, be provided with circular cone (27) in described valve pocket (2), described circular cone (27) is arranged on described oil outlet (4) top, and described spool (7) top is provided with the conical surface fitted tightly mutually with described circular cone (27).
CN201320421302.7U 2013-07-16 2013-07-16 Remote control overflow valve CN203374967U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320421302.7U CN203374967U (en) 2013-07-16 2013-07-16 Remote control overflow valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320421302.7U CN203374967U (en) 2013-07-16 2013-07-16 Remote control overflow valve

Publications (1)

Publication Number Publication Date
CN203374967U true CN203374967U (en) 2014-01-01

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Application Number Title Priority Date Filing Date
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Country Link
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105971959A (en) * 2016-06-25 2016-09-28 玉环县现代工具有限公司 Differential pressure type unloading safety valve
CN107676326A (en) * 2017-11-23 2018-02-09 王雅莲 Automatically the overflow valve calibrated
CN107676327A (en) * 2017-11-23 2018-02-09 王雅莲 Automatically the adjustable overflow valve calibrated
CN107850227A (en) * 2015-07-31 2018-03-27 Kyb株式会社 Combination valve and the dual flow control valve for having used the combination valve
CN109404357A (en) * 2018-10-30 2019-03-01 武汉船用机械有限责任公司 A kind of overflow valve

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107850227A (en) * 2015-07-31 2018-03-27 Kyb株式会社 Combination valve and the dual flow control valve for having used the combination valve
CN105971959A (en) * 2016-06-25 2016-09-28 玉环县现代工具有限公司 Differential pressure type unloading safety valve
CN107676326A (en) * 2017-11-23 2018-02-09 王雅莲 Automatically the overflow valve calibrated
CN107676327A (en) * 2017-11-23 2018-02-09 王雅莲 Automatically the adjustable overflow valve calibrated
CN109404357A (en) * 2018-10-30 2019-03-01 武汉船用机械有限责任公司 A kind of overflow valve

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GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140101

Termination date: 20170716

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