CN105909583A - Buffer overflow valve and hydraulic system - Google Patents

Buffer overflow valve and hydraulic system Download PDF

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Publication number
CN105909583A
CN105909583A CN201610117751.0A CN201610117751A CN105909583A CN 105909583 A CN105909583 A CN 105909583A CN 201610117751 A CN201610117751 A CN 201610117751A CN 105909583 A CN105909583 A CN 105909583A
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CN
China
Prior art keywords
valve
spool
regulation
hydraulic
buffer
Prior art date
Application number
CN201610117751.0A
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Chinese (zh)
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CN105909583B (en
Inventor
叶清
陈婉君
崔英丽
Original Assignee
杭州力龙液压有限公司
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Priority to CN201610117751.0A priority Critical patent/CN105909583B/en
Publication of CN105909583A publication Critical patent/CN105909583A/en
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Publication of CN105909583B publication Critical patent/CN105909583B/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
    • F15B13/025Pressure reducing valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/20Excess-flow valves
    • F16K17/22Excess-flow valves actuated by the difference of pressure between two places in the flow line
    • F16K17/24Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
    • F16K17/28Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
    • F16K17/30Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded

Abstract

The invention discloses a buffer overflow valve which is equipped with a valve seat, a valve body, a differential valve core, a buffer valve core, and a reset spring. The valve body and the valve seat are fixedly connected. The valve seat is provided with a first oil mouth, and the valve body is provided with a second oil mouth. The differential valve core and the buffer valve core are arranged inside the valve body in a sliding manner. A first buffer room is arranged in a first end of the buffer valve core, and a second buffer room is arranged in a second end of the buffer valve core. A first damping oil duct is arranged axially on the differential valve core, and the first damping oil duct is connected with the first oil mouth and the first buffer room. A second damping oil duct is arranged axially on the buffer valve core, and the second damping oil duct is connected with the first buffer room and the second buffer room. Compared with the prior art, the second damping oil duct is arranged axially on the buffer valve core, the second buffer room is arranged in the second end of the buffer valve core, so that the structure of the buffer overflow valve is simplified and convenience is brought to processing and manufacturing on the premise that a buffer function is achieved. The invention further discloses a hydraulic system provided with the buffer overflow valve.

Description

Buffer relief valve and hydraulic system

Technical field

The present invention relates to hydraulic transmission technology, be specifically related to a kind of buffer relief valve and hydraulic system.

Background technology

Hydraulic drive is a kind of transmission utilizing hydraulic oil to come transmitting movement and power in airtight hydraulic system Mode, has the plurality of advantages such as stepless time adjustment, speed adjustable range is big, reaction is quick, is widely used to all kinds of On Work machine or vehicle.

Generally, hydraulic system includes that dynamical element, executive component, auxiliary element, hydraulic oil (also referred to as work Medium) and control the major parts such as element, the effect of dynamical element is the changes mechanical energy inputted by prime mover For the pressure energy of hydraulic oil, hydraulic oil is supplied to executive component through oil pipe, and common dynamical element is hydraulic pressure Pump.The effect of executive component is that the pressure of hydraulic oil can be converted into mechanical energy, drives operating mechanism's action, Typical executive component has hydraulic motor, hydraulic jack etc..The effect controlling element is to control and regulation hydraulic pressure The pressure of fluid, flow and flow direction in system, the action required to ensure operating mechanism to complete, control Element is generally various hydraulic valve class component.The effect auxiliary hydraulic system of auxiliary element completes normally to work, Such as fuel tank, oil pipe, filter etc..

In hydraulic system, starting or stoping of executive component, in inevitably causing hydraulic system Pressure is increased dramatically, and the pressure being increased dramatically is easy to damage hydraulic components.In order to reduce hydraulic shock band The negative effect come, generally installs buffer relief valve, utilizes buffer-type to overflow in the appropriate location of hydraulic system Stream valve with the pressure oscillation of suppression system, and then can reduce the fault rate of complete machine;But, common buffer-type Structure of relief valve is the most complicated, and difficulty of processing is relatively big, and matching requirements are high.

Summary of the invention

In view of this, the present invention proposes a kind of buffer relief valve, and compared with prior art, this buffer-type overflows Stream valve arrangement is simple, easy to process.On this basis, the present invention also proposes one and has this buffer-type overflow The hydraulic system of valve.

As first aspect, the present invention proposes a kind of buffer relief valve;This buffer relief valve include valve seat, Valve body, differential spool, buffering spool and back-moving spring, described valve seat is fixedly connected with the valve body, described valve seat Being provided with the first hydraulic fluid port, described valve body is provided with the second hydraulic fluid port and valve pocket, described differential spool is gentle rushes valve Core is all slideably positioned in described valve pocket, and the first end of described differential spool is slidably connected with valve pocket inwall, and The plug at end part of the first end is on the first hydraulic fluid port, and the second end of described differential spool is slidably arranged in buffering spool The first end in;Described back-moving spring is set on different valve core, and one end contact of back-moving spring is differential On first end of spool, its other end contact is on spring base;It is provided with in first end of described buffering spool First surge chamber, its second end is provided with the second surge chamber;Axially disposed on described differential spool have first Damping oil duct, the first damping oil duct connects the first hydraulic fluid port and the first surge chamber;On described buffering spool vertically Being disposed with the second damping oil duct, the second damping oil duct connects the first surge chamber and the second surge chamber.

Preferably, described valve body includes valve body and regulation set, and regulation set is movably arranged on valve body, institute Stating regulation set by spring base contact in the end of described back-moving spring, described buffering spool is slideably positioned in tune In joint set.

Preferably, the inwall of described valve body and the periphery wall of regulation set are provided with screw thread, described regulation Set is connected with valve body by screw thread.

Preferably, described second damping oil duct being provided with choke plug, described choke plug is arranged on buffering spool The second end inside;Or, described second damping oil duct is provided with throttle orifice.

Preferably, the periphery of the second end of described buffering spool is provided with fixing nut, described fixing nut It is slidably connected with regulation set inwall, and is provided with limited step on regulation set inwall.

Preferably, the first damping cavity, described fixing nut it are provided with between described fixing nut and limited step Periphery wall and the inwall of regulation set between be provided with the 3rd damping oil duct, described 3rd damping oil duct connects the Two surge chambers and the first damping cavity.

Preferably, the outer wall that the second end of described differential spool contacts with described buffering spool is provided with multiple tracks Grading ring groove.

Preferably, it is provided with the second damping between outer wall and the regulation set inwall of the first end of described buffering spool Chamber, described second damping cavity is for the accommodating hydraulic oil being permeated from the first damping cavity and the second surge chamber.

Preferably, described regulation puts and is provided with radially oil leak hole and axial oil leak hole, described radial direction oil leak hole, Axially oil leak hole is all connected with the second damping cavity.

As second aspect, the present invention proposes a kind of hydraulic system;This hydraulic system includes pressure oil-source, liquid Pressure motor, hydraulic oil container and the buffer relief valve of above-mentioned any one, described pressure oil-source and hydraulic motor Oil-in, the first hydraulic fluid port of buffer relief valve connect, the oil return opening of described hydraulic oil container and hydraulic motor, Second hydraulic fluid port of buffer relief valve connects.

The buffer relief valve that the present invention proposes is provided with valve seat, valve body, differential spool, buffering spool and answers Position spring, valve body is fixing with valve seat to be connected, and valve seat is provided with the first hydraulic fluid port and the second hydraulic fluid port, differential spool All it is slideably positioned in valve body with buffering spool, in the first end of buffering spool, is provided with the first surge chamber, its Second end is provided with the second surge chamber;Axially disposed on differential spool have the first damping oil duct, the first damping Oil duct connects the first hydraulic fluid port and the first surge chamber;Axially disposed on buffering spool have the second damping oil duct, the Two damping oil ducts connect the first surge chamber and the second surge chamber.Compared with prior art, edge on buffering spool Axially arranged second damping oil duct, and the second surge chamber is arranged in buffering spool the second end, realizing buffering On the premise of function, simplify the structure of buffer relief valve, offer convenience to processing and manufacturing.

Accompanying drawing explanation

The accompanying drawing of the part constituting the present invention is used for providing a further understanding of the present invention, and the present invention shows Meaning property embodiment and explanation thereof are used for explaining the present invention, are not intended that inappropriate limitation of the present invention.At accompanying drawing In:

The structural representation of the buffer relief valve that Fig. 1 provides for the specific embodiment of the invention;

The structural representation of the valve seat that Fig. 2 provides for the specific embodiment of the invention;

The structural representation of the regulation set that Fig. 3 provides for the specific embodiment of the invention;

The structural representation of the differential spool that Fig. 4 provides for the specific embodiment of the invention;

The structural representation of the buffering spool that Fig. 5 provides for the specific embodiment of the invention;

The structural representation of the choke plug that Fig. 6 provides for the specific embodiment of the invention;

The structural representation of the fixing nut that Fig. 7 provides for the specific embodiment of the invention.

Description of reference numerals:

The 1 differential spool 4 of valve seat 2 valve body 3 buffers spool 5 back-moving spring

6 regulation set 7 locking nuts 8 fix nut 9 screw plug 10 spring base

The 11 first axial oil ducts of hydraulic fluid port 12 second hydraulic fluid port 13 first

The 14 first axial oil ducts of surge chamber 15 second surge chamber 16 second

17 second damping cavity 18 choke plug 19 first damping cavity 21 valve ante-chambers

22 valve back cavity 31 valve rod 32 valve head 33 first segment discharge orifices

34 first grading ring grooves 41 buffer ante-chamber 42 and buffer back cavity

43 second right chamber 63, the left chamber of grading ring groove 61 62 adapter cavities

The 64 radial direction axial oil leak hole of oil leak hole 65

Detailed description of the invention

It should be noted that in the case of not conflicting, the embodiment in the present invention and the feature in embodiment Can be mutually combined.The specific embodiment of 1 to 7 couple of present invention is described in detail below in conjunction with the accompanying drawings.

The specific embodiment of the invention propose buffer relief valve include valve seat 1, valve body, regulation set 6, differential Spool 3, buffering spool 4 and back-moving spring 5, valve seat 1 is provided with the first hydraulic fluid port 11, and valve body includes valve Body 2 and regulation set 6, valve body 2 is provided with the second hydraulic fluid port 12, and valve body 2 is fixing with valve seat 1 even Connect;As in figure 2 it is shown, valve body 2 is internally provided with valve ante-chamber 21 and valve back cavity 22, valve ante-chamber 21 is positioned at The left end of valve body 2, valve back cavity 22 is positioned at the right-hand member of valve body 2, and the second hydraulic fluid port 12 is diametrically disposed at On valve ante-chamber 21, the inwall of valve back cavity 22 is provided with female thread.

As it is shown on figure 3, the left end of regulation set 6 is provided with left chamber 61, the right-hand member of regulation set 6 is provided with right chamber 62, it is provided with adapter cavity 63 between left chamber 61 and right chamber 62, the periphery wall of the left end of regulation set 6 is arranged There is external screw thread, this external screw thread and the screw-internal thread fit on valve back cavity 22 inwall.

As shown in Figure 4, differential spool 3 includes valve head 32 and valve rod 31, and valve head 32 is positioned at valve rod 31 Left end, the right-hand member outer wall of valve rod 31 is provided with the first grading ring groove 34, differential spool 3 sets vertically Being equipped with the first damping oil duct, the first damping oil road specifically includes the first axial oil duct 13 and first segment discharge orifice 33, First segment discharge orifice 33 is arranged on valve head 32, and the first axial oil duct 13 runs through valve rod 31 and extends to first At throttle orifice 33.

As it is shown in figure 5, buffering spool 4 includes buffering ante-chamber 41, buffering back cavity 42, buffer ante-chamber 41 In the left end of buffering spool 4, buffering back cavity 42 is positioned at the right-hand member of buffering spool 4, along axle on buffering spool 4 To being provided with the second damping oil duct, the second damping oil duct includes the second axial oil duct 16 and second section discharge orifice, the Two axial oil ducts 16 are arranged between buffering ante-chamber 41 and buffering back cavity 42, and second section discharge orifice is arranged on throttling On stifled 18, choke plug 18 periphery wall is provided with external screw thread, on this external screw thread and buffering back cavity 42 inwall Screw-internal thread fit, buffering spool 4 right-hand member periphery wall is provided with external screw thread, has been threaded connection fixing spiral shell Female 8.

As it is shown in figure 1, on buffer relief valve, regulation set 6 is movably connected in valve body 2 by screw thread On, regulation set 6 can move axially by rotating in valve back cavity 22, for secured adjusted set 6 and valve originally The relative position of body 2, is provided with locking nut 7 between valve body 2 and regulation set 6.Differential spool 3 Valve head 32 is slidably connected with the inwall of valve ante-chamber 21, the conical surface contact of valve head 32 on the first hydraulic fluid port 11, The right-hand member of slide bar is slidably arranged in buffering ante-chamber 41, is formed with the first surge chamber 14 in buffering ante-chamber 41; Buffering spool 4 is slidably arranged in regulation set 6, and the right-hand member of buffering spool 4 is through the transition of regulation set 6 Chamber 63, and extend to the right chamber 62 of regulation set 6, buffering spool 4 is provided with the second grading ring groove 43, It is provided with screw plug 9 on the right-hand member of regulation set 6, between right-hand member and the screw plug 9 of buffering spool 4, is formed with second Surge chamber 15, is formed with the first damping cavity 19, in left chamber between fixing nut 8 and the step in right chamber 62 It is formed with the second damping cavity 17 between 61 and the outer wall of buffering ante-chamber 41;Fixing nut 8 and regulation set 6 it Between be provided with gap, this gap has damping action, under pressure, hydraulic oil can from second buffering Room 15 flows to the first damping cavity 19;Hydraulic oil flows out for convenience, is provided with radially on regulation set 6 Oil leak hole 64 and axial oil leak hole 65, radially oil leak hole 64 and axial oil leak hole 65 all with the second damping cavity 17 connections.Back-moving spring 5 is set on the valve rod 31 of differential spool 3, and its left end is resisted against on valve head 32, Right-hand member is resisted against on spring base 10, and spring base 10 is slidably located on valve rod 31, the right side of spring base 10 It is resisted against on the left end of buffering spool 4 or the left end end face of regulation set 6, under the effect of back-moving spring 5, Differential spool 3 compresses to the first hydraulic fluid port 11, under the ordering about of regulation set 6 or buffering spool 4, and spring base 10 are moved to the left along valve rod 31.

During work, the first hydraulic fluid port 11 is connected with the high-pressure oil passage of hydraulic system, the second hydraulic fluid port 12 and hydraulic pressure system The low pressure oil way of system connects;The operation principle of this buffer relief valve is: the pressure at the first hydraulic fluid port 11 is with liquid The pressure of pressure system raises, and when being increased to the first predetermined value, the stress of differential spool 3 left end is more than reset bullet During the resistance of spring 5 and the first surge chamber 14, differential spool 3 moves right, the first hydraulic fluid port 11 and the second oil Mouth 12 connection, hydraulic oil flows from high pressure side toward low pressure side, and the increase tendency of the pressure of high-pressure oil passage subtracts Delaying or stop, meanwhile, hydraulic oil enters into the first surge chamber 14 through the first damping oil duct, along with first delays The pressure rushing room 14 is stepped up, when the active force of the first surge chamber 14 and back-moving spring 5 is more than different valve During the stress of core 3 left end, differential spool 3 is moved to the left, and closes the first hydraulic fluid port 11, hydraulic system hydraulic oil The pressure on road continues to raise;Along with pressure continues to raise, differential spool 3 moves right again, the first hydraulic fluid port 11 and second hydraulic fluid port 12 turn on, the pressure of high-pressure oil passage slows down increase tendency again, meanwhile, the first buffering Hydraulic oil in room 14 enters into the second surge chamber 15, and hydraulic oil damps to first through the 3rd damping oil duct Chamber 19 is shifted, and has delayed the pressure rise time of the second surge chamber 15 to a certain extent, when the second surge chamber When the pressure of 15 is increased to the stress buffering spool 4 right-hand member more than left end, buffering spool 4 is moved to the left, and enters And compression reseting spring 5, until fixing nut 8 moves on the right side of regulation set 6, complete pooling feature, Under the active force of back-moving spring 5 and the first surge chamber 14, differential spool 3 is moved to the left, and then closes first Hydraulic fluid port 11.The most whole process is the ofest short duration, primarily serves the pressure wave starting steady and effective suppression system Dynamic.The pressure of hydraulic system high-pressure oil passage continues to raise, when pressure is increased to overflow threshold values, and differential spool When the stress of 3 left ends overcomes back-moving spring 5 and the first surge chamber 14 resistance again, differential spool 3 moves right Dynamic, high-pressure oil passage starts pressure release, prevents hypertonia, it is achieved overflow valve relief function.

According to above-mentioned operation principle it is recognised that hindered by the first damping oil duct, the first surge chamber 14, second Buddhist nun's oil duct, the second surge chamber 15 and the synergy of back-moving spring 5, the pressure of high-pressure oil passage is to be stepped up , it is to avoid system pressure drastically raises brought negative effect;Further, the pressure at high-pressure oil passage reaches During overflow threshold values, actively high-pressure oil passage is carried out pressure release, prevent overload.

During buffering spool 4 is moved to the left, the hydraulic oil in the first damping cavity 19 can be through the 3rd resistance Buddhist nun's oil duct flows to the second surge chamber 15, due to the damping action of the first damping cavity 19, buffering spool 4 to The process moved left more slowly, more steadily, finally slows down the process that high-pressure oil passage pressure raises.

When the first hydraulic fluid port 11 pressure the most to a certain degree, back-moving spring 5 orders about differential spool 3 and is moved to the left, Buffering spool 4 moves right, and is finally reset to original state.The hydraulic oil of the second damping cavity 17, Jing Guohuan Rushing spool 4 to discharge with the gap on regulation set 6, radially oil leak hole 64 and axial oil leak hole 65, second delays The hydraulic oil rushing room 15 enters the first damping cavity 19 through the 3rd damping oil duct, all serves certain buffering Effect.

In the above-described embodiments, by arranging the first grading ring groove 34, it is possible to prevent differential spool 3 and buffering Between spool 4, catching phenomenon occurs, it is ensured that can smooth and easy slide between differential spool 3 and buffering spool 4; In like manner, by arranging the second grading ring groove 43, it is possible to prevent to buffer appearance card between spool 4 and regulation set 6 Stagnant phenomenon, it is ensured that can smooth and easy slide between buffering spool 4 and regulation set 6.

In other embodiments, second section discharge orifice directly in the second axial oil duct 16, and then can be able to go Fall choke plug 18.

Compared with prior art, above-mentioned buffer relief valve has the advantage that simple and compact for structure, body Long-pending little, be convenient to process and mount, reduce clamping stagnation risk;Effectively absorption system pressure pulse, surge suppressing, Extend machine life.

It addition, the specific embodiment of the invention also proposes a kind of hydraulic system, including pressure oil-source, hydraulic motor, Hydraulic oil container and above-mentioned buffer relief valve, pressure oil-source and the oil-in of hydraulic motor, buffer-type overflow First hydraulic fluid port 11 of valve connects, hydraulic oil container and the oil return opening of hydraulic motor, the second oil of buffer relief valve Mouth 12 connects.

The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this Within bright spirit and principle, any modification, equivalent substitution and improvement etc. made, should be included in this Within bright protection domain.

Claims (10)

1. a buffer relief valve, it is characterised in that include valve seat (1), valve body (2), differential spool (3), buffering spool (4) and back-moving spring (5), described valve seat (1) is fixing with valve body (2) to be connected, Described valve seat (1) is provided with the first hydraulic fluid port (11), and described valve body (2) is provided with the second hydraulic fluid port (12) With valve pocket, described differential spool (3) and buffering spool (4) are all slideably positioned in described valve pocket, described First end of differential spool (3) is slidably connected with valve pocket inwall, and the plug at end part of the first end is at the first hydraulic fluid port (11), on, the second end of described differential spool (3) is slidably arranged in the first end of buffering spool (4); Described back-moving spring (5) is set on differential spool (3), and one end contact of back-moving spring (5) is poor On first end of movable valve plug (3), its other end contact is on spring base (10);Described buffering spool (4) The first end in be provided with the first surge chamber (14), its second end is provided with the second surge chamber (15);Described Differential spool (3) is the most axially disposed the first damping oil duct, and the first damping oil duct connects the first hydraulic fluid port (11) With the first surge chamber (14);Described buffering spool (4) is upper the most axially disposed has the second damping oil duct, and second Damping oil duct connects the first surge chamber (14) and the second surge chamber (15).
Buffer relief valve the most according to claim 1, it is characterised in that described valve body includes that valve is originally Body (2) and regulation set (6), regulation set (6) is movably arranged on valve body (2), described regulation set (6) By spring base (10) contact in the end of described back-moving spring (5), described buffering spool (4) is slided It is arranged in regulation set (6).
Buffer relief valve the most according to claim 2, it is characterised in that described valve body (2) Inwall and regulation set (6) periphery wall on be provided with screw thread, described regulation set (6) by screw thread with Valve body (2) connects.
Buffer relief valve the most according to claim 3, it is characterised in that described second damping oil duct On be provided with choke plug (18), described choke plug (18) be arranged on buffering spool (4) the second end inside; Or, described second damping oil duct is provided with throttle orifice.
Buffer relief valve the most according to claim 4, it is characterised in that described buffering spool (4) The second end periphery on be provided with fixing nut (8), described fixing nut (8) with in regulation set (6) Wall is slidably connected, and is provided with limited step on regulation set (6) inwall.
Buffer relief valve the most according to claim 5, it is characterised in that described fixing nut (8) And it is provided with the first damping cavity (19), the periphery wall of described fixing nut (8) and regulation between limited step Being provided with the 3rd damping oil duct between the inwall of set (6), described 3rd damping oil duct connects the second surge chamber (15) With the first damping cavity (19).
Buffer relief valve the most according to claim 6, it is characterised in that described differential spool (3) The outer wall that contacts with described buffering spool (4) of the second end on be provided with multiple tracks grading ring groove.
Buffer relief valve the most according to claim 6, it is characterised in that described buffering spool (4) The first end outer wall and regulation set (6) inwall between be provided with the second damping cavity (17), described second resistance Buddhist nun chamber (17) is for the accommodating hydraulic pressure being permeated from the first damping cavity (19) and the second surge chamber (15) Oil.
Buffer relief valve the most according to claim 8, it is characterised in that described regulation set (6) On be provided with radially oil leak hole (64) and axial oil leak hole (65), described radial direction oil leak hole (64), axial Oil leak hole (65) is all connected with the second damping cavity (17).
10. a hydraulic system, it is characterised in that include pressure oil-source, hydraulic motor, hydraulic oil container and Buffer relief valve described in claim 1 to 9 any one, described pressure oil-source enters with hydraulic motor Hydraulic fluid port, first hydraulic fluid port (11) of buffer relief valve connect, described hydraulic oil container and the oil return of hydraulic motor Mouth, second hydraulic fluid port (12) of buffer relief valve connect.
CN201610117751.0A 2016-03-02 2016-03-02 Buffer relief valve and hydraulic system CN105909583B (en)

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CN201610117751.0A CN105909583B (en) 2016-03-02 2016-03-02 Buffer relief valve and hydraulic system

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Application Number Priority Date Filing Date Title
CN201610117751.0A CN105909583B (en) 2016-03-02 2016-03-02 Buffer relief valve and hydraulic system

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CN105909583B CN105909583B (en) 2018-01-30

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107575258A (en) * 2017-10-27 2018-01-12 鸿大智能机械有限公司 Automatic pressure relief device suitable for hydraulic control one-way valve
CN107762541A (en) * 2017-10-26 2018-03-06 鸿大智能机械有限公司 The automatic unloading device of hydraulic control one-way valve
CN107762542A (en) * 2017-10-26 2018-03-06 鸿大智能机械有限公司 The regulator of automatic unloading hydraulic control one-way valve
CN107842381A (en) * 2017-10-26 2018-03-27 鸿大智能机械有限公司 Automatic unloading hydraulic control one-way valve
CN107842380A (en) * 2017-10-26 2018-03-27 鸿大智能机械有限公司 The core assembly of automatic unloading hydraulic control one-way valve
CN107842382A (en) * 2017-10-27 2018-03-27 鸿大智能机械有限公司 Hydraulic control one-way valve
CN107859524A (en) * 2017-10-27 2018-03-30 鸿大智能机械有限公司 The core assembly of hydraulic control one-way valve
CN108061069A (en) * 2017-12-19 2018-05-22 宁波文泽机电技术开发有限公司 Buffer overflow valve
CN108167255A (en) * 2017-12-28 2018-06-15 赛克思液压科技股份有限公司 A kind of pressure-control valve with pooling feature

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CN202073860U (en) * 2011-06-01 2011-12-14 宁波克泰液压有限公司 Threaded plug-in adjustable buffer overflow valve
CN103477134A (en) * 2011-06-08 2013-12-25 川崎重工业株式会社 Relief valve
CN202182080U (en) * 2011-08-15 2012-04-04 宁波广天赛克思液压有限公司 Overflow valve with secondary buffering function for hydraulic pump
CN102913513A (en) * 2012-10-31 2013-02-06 陕西航天动力高科技股份有限公司 High-reliability directly operated type safety valve device with hydraulic balance principle
CN102996557A (en) * 2012-12-27 2013-03-27 宁波广天赛克思液压有限公司 Pressure adjustable buffer overflow valve
CN103697019A (en) * 2013-12-27 2014-04-02 龙工(上海)精工液压有限公司 Safety valve for motor of excavator
CN205503597U (en) * 2016-03-02 2016-08-24 杭州力龙液压有限公司 Buffering formula overflow valve and hydraulic system

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Publication number Priority date Publication date Assignee Title
CN107762541A (en) * 2017-10-26 2018-03-06 鸿大智能机械有限公司 The automatic unloading device of hydraulic control one-way valve
CN107762542A (en) * 2017-10-26 2018-03-06 鸿大智能机械有限公司 The regulator of automatic unloading hydraulic control one-way valve
CN107842381A (en) * 2017-10-26 2018-03-27 鸿大智能机械有限公司 Automatic unloading hydraulic control one-way valve
CN107842380A (en) * 2017-10-26 2018-03-27 鸿大智能机械有限公司 The core assembly of automatic unloading hydraulic control one-way valve
CN107575258A (en) * 2017-10-27 2018-01-12 鸿大智能机械有限公司 Automatic pressure relief device suitable for hydraulic control one-way valve
CN107842382A (en) * 2017-10-27 2018-03-27 鸿大智能机械有限公司 Hydraulic control one-way valve
CN107859524A (en) * 2017-10-27 2018-03-30 鸿大智能机械有限公司 The core assembly of hydraulic control one-way valve
CN108061069A (en) * 2017-12-19 2018-05-22 宁波文泽机电技术开发有限公司 Buffer overflow valve
CN108167255A (en) * 2017-12-28 2018-06-15 赛克思液压科技股份有限公司 A kind of pressure-control valve with pooling feature

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