CN105952702B - A kind of balanced valve - Google Patents

A kind of balanced valve Download PDF

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Publication number
CN105952702B
CN105952702B CN201610453852.5A CN201610453852A CN105952702B CN 105952702 B CN105952702 B CN 105952702B CN 201610453852 A CN201610453852 A CN 201610453852A CN 105952702 B CN105952702 B CN 105952702B
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CN
China
Prior art keywords
valve
plug
hydraulic fluid
port
fluid port
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Application number
CN201610453852.5A
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Chinese (zh)
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CN105952702A (en
Inventor
林福明
Original Assignee
宁波市镇海天地液压有限公司
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Priority to CN201610453852.5A priority Critical patent/CN105952702B/en
Publication of CN105952702A publication Critical patent/CN105952702A/en
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Publication of CN105952702B publication Critical patent/CN105952702B/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/029Counterbalance valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B2013/002Modular valves, i.e. consisting of an assembly of interchangeable components

Abstract

A kind of balanced valve disclosed by the invention, including valve body, main valve plug and nonreturn valve core, are respectively equipped with the first hydraulic fluid port, the second hydraulic fluid port and control port on valve body, and the front end of valve body is equipped with spring base, support being equipped with one-way valve spring between spring base and nonreturn valve core;The front end of main valve plug is equipped with is equipped with the circular cone coordinated with nonreturn valve core sealing with the corresponding valve port of the second hydraulic fluid port, the outer wall of valve port;The middle part of main valve plug is equipped with and is connected with the corresponding oil-through hole of the first hydraulic fluid port, the first hydraulic fluid port by oil-through hole with valve port;The rear end of valve body is equipped with plug screw, supports being equipped with groups of springs between the rear end of main valve plug and plug screw;Also it is arranged between main valve plug and valve body and is axially linked with main valve plug with the corresponding guide sleeve of control port, guide sleeve, is connected between guide sleeve and valve body formed with control oil pocket, control port with control oil pocket.The configuration of the present invention is simple is reasonable, and flushing effect is preferable, and oil return is unobstructed, advantageously reduces energy loss, improves work efficiency.

Description

A kind of balanced valve

Technical field

The present invention relates to valve class technical field, more particularly to a kind of balanced valve.

Background technology

Balanced valve is also known as load control valve or motion control valve, is the crucial Hydraulic Elements in hydraulic pressure load bearing system.Balance The characteristics of valve is to integrate three valves:First, as check valve, it allows liquid stream to enter hydraulic actuator without restriction (such as oil Cylinder or motor), to lift load, circuit is then pinned, keeps load situation constant;Second, as hydraulic-control throttling valve, pass through control Port processed controls the open amount of throttle valve, so as to control speed, making load, speed smoothly declines on request;Third, as excessive Valve is flowed, in no control pressure, but when the pressure (due to such as thermal expansion or external force) of load port exceedes setting pressure, overflow valve Open, to avoid hydraulic actuator because of excessive pressure damages.Balanced valve is usually used cooperatively with telescopic oil cylinder, but traditional balanced valve Since self structure setting is unreasonable, not only flushing effect is bad, but also when the piston rod retraction of telescopic oil cylinder, rodless cavity returns Oil is obstructed so that back pressure rise, liquid resistance increase, so that cause energy loss serious, inefficiency.

The content of the invention

In view of the defects and deficiencies of the prior art, the present invention intends to provide a kind of balanced valve, its conjunction simple in structure Reason, flushing effect is preferable, and oil return is unobstructed, advantageously reduces energy loss, improves work efficiency.

To achieve the above object, the present invention uses following technical scheme:

A kind of balanced valve of the present invention, including valve body, the main valve plug and check valve that are respectively arranged in the valve body Core, is respectively equipped with the first hydraulic fluid port, the second hydraulic fluid port and control port on the valve body, the front end of the valve body is equipped with spring base, institute Valve interior wall is stated equipped with the limited step with the nonreturn valve core counter stopper, the nonreturn valve core is movably arranged at described spacing Supported between step and the spring base, between the spring base and the nonreturn valve core and be equipped with one-way valve spring;

The front end of the main valve plug is equipped with to be equipped with and institute with the corresponding valve port of the second hydraulic fluid port, the outer wall of the valve port State the circular cone that nonreturn valve core sealing coordinates;The middle part of the main valve plug is equipped with corresponding excessively oily with first hydraulic fluid port Hole, first hydraulic fluid port are connected by the oil-through hole with the valve port;The rear end of the valve body is equipped with plug screw, the main valve plug Rear end and the plug screw between support be equipped with groups of springs;

Also be arranged between the main valve plug and the valve body with the corresponding guide sleeve of the control port, the guide sleeve with The main valve plug is axially linked, formed with control oil pocket, the control port and institute between the guide sleeve and the valve body State control oil pocket connection.

Further, the front end of the valve body is equipped with the circlip with the spring base corresponding matching.

Further, regulating piston is equipped with the plug screw, the groups of springs, which is supported, is arranged on the regulating piston and the master Between spool, the plug screw is also equiped with adjusting rod, the front end of the adjusting rod and the regulating piston phase by locking nut To cooperation.

Further, the groups of springs includes inner spring and the outer spring being sheathed on outside the inner spring;The interior bullet Spring, which supports, to be arranged between the main valve plug and the regulating piston, and the outer spring, which supports, is arranged on the main valve plug and the regulating piston Between.

Further, the inner wall of the guide sleeve has radially extended guide sleeve linkage portion, and the outer wall of the main valve plug is radially It is extended with the main valve plug linkage portion with the guide sleeve linkage portion corresponding matching.

Further, main valve plug sealing ring, the master are embedded between the front end outer wall of the main valve plug and the valve body Valve core seal ring is between first hydraulic fluid port and second hydraulic fluid port.

Further, plug screw sealing ring is embedded between the outer wall of the plug screw and the valve body.

Further, guide sleeve sealing ring is embedded between the outer wall of the guide sleeve and the valve body.

Beneficial effects of the present invention are:Balanced valve provided by the invention, under original state, in groups of springs and one-way valve spring Mating reaction under, the circular cone and nonreturn valve core of main valve plug are in sealing contact, and valve port is blocked at this time;

Under working status, when to during the first hydraulic fluid port oil inlet, hydraulic oil enters in main valve plug and promotes nonreturn valve core so that single Compressed to valve spring, gap occur between the circular cone and nonreturn valve core of main valve plug, at this time the first hydraulic fluid port, oil-through hole, valve Mouth and the second hydraulic fluid port sequentially turn on;It is main under the mating reaction of groups of springs and one-way valve spring when the first hydraulic fluid port stops oil inlet Spool is again sealed off contacting with nonreturn valve core, and valve port is again turned off;

When the second hydraulic fluid port pressure is higher than the setting pressure of groups of springs, the circular cone of main valve plug is subject to the anti-of the second hydraulic fluid port Acted on to oil pressure, force the elastic force that main valve plug overcomes groups of springs then to be moved, and nonreturn valve core is due to the resistance of limited step at this time Gear acts on so that forms gap between main valve plug and nonreturn valve core again, at this time the second hydraulic fluid port, valve port, oil-through hole and the first oil Mouth sequentially turns on, and plays the role of overflow;

In the case of the oil pressure of the second hydraulic fluid port is less, if to control port oil inlet, make the pressure rise of control oil pocket, Force guide sleeve to be moved after driving main valve plug, main valve plug and nonreturn valve core is formed gap at this time, promote the second hydraulic fluid port and the One hydraulic fluid port turns on, and the hydraulic oil in the second hydraulic fluid port still can be back in the first hydraulic fluid port.

In conclusion the configuration of the present invention is simple is reasonable, when being used cooperatively with telescopic oil cylinder, not only flushing effect is preferable, and And oil return is unobstructed, energy loss is advantageously reduced, is improved work efficiency.

Brief description of the drawings

Fig. 1 is the overall structure diagram of the present invention.

In Fig. 1:

1st, valve body;11st, the first hydraulic fluid port;12nd, the second hydraulic fluid port;13rd, control port;14th, limited step;2nd, main valve plug;21st, valve Mouthful;22nd, circular cone;23rd, oil-through hole;24th, main valve plug linkage portion;25th, main valve plug sealing ring;3rd, nonreturn valve core;4th, spring base; 41st, circlip;5th, one-way valve spring;6th, plug screw;61st, locking nut;62nd, adjusting rod;63rd, plug screw sealing ring;7th, groups of springs; 71st, inner spring;72nd, outer spring;8th, guide sleeve;81st, guide sleeve linkage portion;82nd, guide sleeve sealing ring;9th, regulating piston;A, control piston.

Embodiment

The present invention is further illustrated below in conjunction with the accompanying drawings.

A kind of balanced valve as shown in Figure 1, including valve body 1, the main valve plug 2 and nonreturn valve core that are respectively arranged in valve body 1 3, the first hydraulic fluid port 11, the second hydraulic fluid port 12 and control port 13 are respectively equipped with valve body 1, and the front end of valve body 1 is equipped with spring base 4, valve 1 inner wall of body is equipped with the limited step 14 with 3 counter stopper of nonreturn valve core, and nonreturn valve core 3 is movably arranged at limited step 14 and bullet Supported between spring abutment 4, between spring base 4 and nonreturn valve core 3 and be equipped with one-way valve spring 5.

The front end of main valve plug 2 be equipped with 12 corresponding valve port 21 of the second hydraulic fluid port, the outer wall of valve port 21 is equipped with and check valve The circular cone 22 that the sealing of core 3 coordinates;The middle part of main valve plug 2 is equipped with and 11 corresponding oil-through hole 23 of the first hydraulic fluid port, the first oil Mouth 11 is connected by oil-through hole 23 with valve port 21;The rear end of valve body 1 is equipped with plug screw 6, is supported between the rear end of main valve plug 2 and plug screw 6 Equipped with groups of springs 7.

Guide sleeve 8 corresponding with control port 13, guide sleeve 8 and 2 axis of main valve plug are also arranged between main valve plug 2 and valve body 1 To being linked, specifically, the inner wall of guide sleeve 8 has radially extended guide sleeve linkage portion 81, and the outer wall of main valve plug 2 radially prolongs The main valve plug linkage portion 24 having with 81 corresponding matching of guide sleeve linkage portion is stretched, said structure is set so that between guide sleeve 8 and main valve plug 2 Linkage effect it is preferable.Connected between guide sleeve 8 and valve body 1 formed with control oil pocket A, control port 13 with control oil pocket A.

Balanced valve provided by the invention, under original state, under the mating reaction of groups of springs 7 and one-way valve spring 5, main valve The circular cone 22 and nonreturn valve core 3 of core 2 are in sealing contact, and valve port 21 is blocked at this time;Under working status, when to the first hydraulic fluid port 11 During oil inlet, hydraulic oil enters in main valve plug 2 and promotes nonreturn valve core 3 so that one-way valve spring 5 is compressed, the annular of main valve plug 2 Occurs gap between the conical surface 22 and nonreturn valve core 3, the first hydraulic fluid port 11, oil-through hole 23,21 and second hydraulic fluid port 12 of valve port be successively at this time Conducting;When the first hydraulic fluid port 11 stops oil inlet, under the mating reaction of groups of springs 7 and one-way valve spring 5, main valve plug 2 with it is unidirectional Spool 3 is again sealed off contacting, and valve port 21 is again turned off.

When 12 pressure of the second hydraulic fluid port is higher than the setting pressure of groups of springs 7, the circular cone 22 of main valve plug 2 is subject to the second oil The reverse oil pressure effect of mouth 12, forces the elastic force that main valve plug 2 overcomes groups of springs 7 then to be moved, and nonreturn valve core 3 is due to limit at this time The barrier effect of position step 14 so that form gap between main valve plug 2 and nonreturn valve core 3 again, at this time the second hydraulic fluid port 12, valve port 21st, 23 and first hydraulic fluid port 11 of oil-through hole sequentially turns on, and plays the role of overflow.

In the case of the oil pressure of the second hydraulic fluid port 12 is less, if to 13 oil inlet of control port, make the pressure of control oil pocket A Rise, forces guide sleeve 8 to be moved after driving main valve plug 2, main valve plug 2 is formed gap with nonreturn valve core 3 at this time, promote second Hydraulic fluid port 12 is turned on the first hydraulic fluid port 11, and the hydraulic oil in the second hydraulic fluid port 12 still can be back in the first hydraulic fluid port 11.

The front end of valve body 1 is equipped with the circlip 41 with 4 corresponding matching of spring base, sets circlip 41 both effectively to cause Spring base 4 installs position degree that is more convenient, and having fully ensured that spring base 4.

Regulating piston 9 is equipped with plug screw 6, groups of springs 7, which is supported, to be arranged between regulating piston 9 and main valve plug 2, and plug screw 6 also passes through Locking nut 61 is equiped with adjusting rod 62, and front end and the regulating piston 9 of adjusting rod 62 offset cooperation.When turn locking nut 61 When, the axial location of regulating piston 9 can easily be adjusted by adjusting rod 62, so as to adjust the setting pressure of groups of springs 7, made It is more preferable to obtain overflow voltage regulation result of the invention.

Specifically, in order to ensure that 7 working performance of groups of springs is more stablized, reliably, groups of springs 7 includes inner spring 71 and set Outer spring 72 outside inner spring 71;Inner spring 71, which supports, to be arranged between main valve plug 2 and regulating piston 9, and outer spring 72 is supported and set Between main valve plug 2 and regulating piston 9.

In order to improve the sealing performance of entirety of the invention, main valve plug is embedded between the front end outer wall and valve body 1 of main valve plug 2 Sealing ring 25, main valve plug sealing ring 25 is between the first hydraulic fluid port 11 and the second hydraulic fluid port 12;Between the outer wall and valve body 1 of plug screw 6 It is embedded with plug screw sealing ring 63;Guide sleeve sealing ring 82 is embedded between the outer wall and valve body 1 of guide sleeve 8.

The above is only the better embodiment of the present invention, therefore all constructions according to described in present patent application scope, The equivalent change or modification that feature and principle are done, is included in the range of present patent application.

Claims (8)

1. a kind of balanced valve, including valve body, the main valve plug and nonreturn valve core that are respectively arranged in the valve body, on the valve body point She You the first hydraulic fluid port, the second hydraulic fluid port and control port, it is characterised in that:First hydraulic fluid port, the second hydraulic fluid port and control port The side wall of valve body is respectively positioned on, the front end of the valve body is equipped with spring base, and the valve interior wall is equipped with to be stopped with the nonreturn valve core The limited step coordinated is kept off, the nonreturn valve core is movably arranged between the limited step and the spring base, the spring base Supported between the nonreturn valve core and be equipped with one-way valve spring;
The front end of the main valve plug is equipped with to be equipped with and the list with the corresponding valve port of the second hydraulic fluid port, the outer wall of the valve port The circular cone coordinated to seal spool;The middle part of the main valve plug is equipped with and the corresponding oil-through hole of the first hydraulic fluid port, institute The first hydraulic fluid port is stated to connect with the valve port by the oil-through hole;The rear end of the valve body is equipped with plug screw, after the main valve plug Supported between end and the plug screw and be equipped with groups of springs;
Also be arranged between the main valve plug and the valve body with the corresponding guide sleeve of the control port, the guide sleeve with it is described Main valve plug is axially linked, formed with control oil pocket, the control port and the control between the guide sleeve and the valve body Liquefaction chamber connects.
2. balanced valve according to claim 1, it is characterised in that:The front end of the valve body is equipped with corresponding with the spring base The circlip of cooperation.
3. balanced valve according to claim 1, it is characterised in that:Regulating piston, the groups of springs are equipped with the plug screw To between the regulating piston and the main valve plug, the plug screw is also equiped with adjusting rod, the tune by locking nut The front end of pole and the regulating piston offset cooperation.
4. balanced valve according to claim 3, it is characterised in that:The groups of springs includes inner spring and is sheathed in described Outer spring outside spring;The inner spring, which supports, to be arranged between the main valve plug and the regulating piston, and the outer spring is supported and set Between the main valve plug and the regulating piston.
5. balanced valve according to claim 1, it is characterised in that:The inner wall of the guide sleeve has radially extended guide sleeve linkage Portion, the outer wall of the main valve plug radially extend the main valve plug linkage portion with the guide sleeve linkage portion corresponding matching.
6. balanced valve according to claim 1, it is characterised in that:Between the front end outer wall and the valve body of the main valve plug Main valve plug sealing ring is embedded with, the main valve plug sealing ring is between first hydraulic fluid port and second hydraulic fluid port.
7. balanced valve according to claim 1, it is characterised in that:It is embedded between the outer wall of the plug screw and the valve body Plug screw sealing ring.
8. balanced valve according to claim 1, it is characterised in that:It is embedded between the outer wall of the guide sleeve and the valve body Guide sleeve sealing ring.
CN201610453852.5A 2016-06-20 2016-06-20 A kind of balanced valve CN105952702B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610453852.5A CN105952702B (en) 2016-06-20 2016-06-20 A kind of balanced valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610453852.5A CN105952702B (en) 2016-06-20 2016-06-20 A kind of balanced valve

Publications (2)

Publication Number Publication Date
CN105952702A CN105952702A (en) 2016-09-21
CN105952702B true CN105952702B (en) 2018-04-13

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ID=56907197

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610453852.5A CN105952702B (en) 2016-06-20 2016-06-20 A kind of balanced valve

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108105193B (en) * 2017-12-21 2019-11-22 浙江达柏林阀门有限公司 A kind of balanced valve that can reduce Glais ring frictional force
CN108223475B (en) * 2018-02-05 2020-05-08 苏州润伦机械有限公司 Compact one-way sequence valve
CN108953267B (en) * 2018-08-22 2020-08-14 上海昂极仪表科技有限公司 Flow type balance valve
CN108775431A (en) * 2018-08-22 2018-11-09 东莞海特帕沃液压科技有限公司 Balanced valve
US10683879B1 (en) * 2019-01-22 2020-06-16 Sun Hydraulics, Llc Two-port electrohydraulic counterbalance valve

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5409040A (en) * 1993-08-09 1995-04-25 Koomey Companies International, Inc. Springless pilot operated sequence valve
CN101634317B (en) * 2009-08-21 2011-12-28 宁波汉商液压有限公司 Plug-in type balance valve
CN101865171A (en) * 2010-07-02 2010-10-20 镇江大力液压马达有限责任公司 Thread cartridge balanced valve
CN201963626U (en) * 2011-02-02 2011-09-07 卢宇 Balanced valve with quick closing valve core
KR102083686B1 (en) * 2013-12-26 2020-03-02 두산인프라코어 주식회사 Pressure peak rerief valve for excavator and system of the same
CN205823772U (en) * 2016-06-20 2016-12-21 宁波市镇海天地液压有限公司 A kind of balanced valve

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