CN2748677Y - Balance valve - Google Patents

Balance valve Download PDF

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Publication number
CN2748677Y
CN2748677Y CN 200320124145 CN200320124145U CN2748677Y CN 2748677 Y CN2748677 Y CN 2748677Y CN 200320124145 CN200320124145 CN 200320124145 CN 200320124145 U CN200320124145 U CN 200320124145U CN 2748677 Y CN2748677 Y CN 2748677Y
Authority
CN
China
Prior art keywords
valve
cavity
spring
main
control
Prior art date
Application number
CN 200320124145
Other languages
Chinese (zh)
Inventor
贺勍
杨洁
Original Assignee
贺勍
杨洁
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 贺勍, 杨洁 filed Critical 贺勍
Priority to CN 200320124145 priority Critical patent/CN2748677Y/en
Application granted granted Critical
Publication of CN2748677Y publication Critical patent/CN2748677Y/en

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Abstract

The utility model discloses a balance valve, comprising a unidirectional valve, a liquid control throttle valve and a directly movable type safety valve which are arranged on one mechanical integrated block (valve body). The unidirectional valve comprises a unidirectional valve sleeve, a valve core, a valve seat and a spring. The throttle valve part of the liquid control throttle valve comprises a main valve core with small throttling holes arranged in a radial and spiral way, a small unidirectional valve core arranged in the inner cavity of the main valve core, a small unidirectional valve spring, a throttling plug, a main spring, a spring seat, a regulating screw and a main valve sleeve. The liquid control valve part comprises a control piston sleeve, a control piston, a following stop valve which is arranged in the inner cavity and provided with a spring ball piston type stop valve, an oil inlet plug, etc. The directly movable type safety valve comprises a cone valve core, a pressure regulating spring, a pressure regulating seat and a regulating screw. The inner cavity of the unidirectional valve is communicated with the inner cavity of the liquid control throttle valve and the inner cavity of the directly movable type safety valve, the outer cavity of the unidirectional valve is communicated with the outer cavity of the throttle valve, and the outer cavity of the directly movable type safety valve is communicated with the outer cavity of the liquid control valve. The utility model has the advantages that: the sealing performance and the service life are greatly improved, the pressure control is smoothly increased along with the forward displacement control of the piston without step saltation, the dynamic stability of the main valve core is ensured and is regulated by the regulating screw, and the oil passing ability of the throttling port is increased times by times.

Description

Novel balance valve
Technical field:
The utility model relates to a kind of equilibrium valve, particularly the hoisting circuit equilibrium valve that uses in the crane hydraulic system, luffing loop equilibrium valve and flexible loop equilibrium valve.
Technical background:
The matched equilibrium valve product of present domestic crane is the product of the eighties in last century.Along with the development of technology and the raising of crane lifting tonnage, original supporting equilibrium valve product no matter structurally still all demonstrate deficiency on the technical performance, so it is supporting to cause domestic main frame producer to buy import equilibrium valve product in the above tonnage hoist cost of 50T fancy price.The defective of the main following several aspects of domestic existing equilibrium valve product: the firstth, the sealability instability, life-span is shorter, causing this disadvantage is factor by following two aspects: two sealing pairs are arranged on the equilibrium valve, and one is the one-way valve sealing pair, and one is the main valve plug sealing pair.The one-way valve sealing pair is made up of the conical surface of valve body flange and nonreturn valve core, because valve body flange can't guarantee its hardness on heat treatment process, usually only do quenching with Subsequent tempering, so its hardness is lower, long-term in the course of the work and nonreturn valve core clashes into, very easily distortion occurs and destroy potted line, make its sealability descend.Though and the hardness number of its sealing pair of main valve plug sealing pair is guaranteed, because of the chamber, front and back of main valve plug is communicated with low pressure, is pressed on its valve pocket sealing seat, rather than is by the high pressure oil effect as the one-way valve sealing by spring action.Because the fatigue of long-term work spring, distortion and because factors such as design, manufacturing process and material also often cause the sealability of this sealing pair to reduce.The secondth, the flow specification is too small, the increase of hoist lifting tonnage, the lengthening of arm operation amplitude, for pressure bar stabilization and the inexcessive increase cylinder diameter that guarantees telescopic oil cylinder loses its lifting performance, the diameter of piston rod of telescopic oil cylinder continues to increase, so just caused the rod chamber of telescopic oil cylinder and the area ratio of rodless cavity to increase, with the 50T crane is that this ratio of example has reached more than 8, if the oil pump with 80ml/r is this loop fuel feeding, flow by equilibrium valve when oil pump 2000rpm surpasses 1000L/m, domestic existing peak rate of flow specification is 400L/m, because logical pasta is long-pending too wide in the gap, the pressure loss is doubled and redoubled, and often causes arm withdrawal overpressure, the too slow and booster phenomenon of speed.The 3rd is that pressure specification is uneven, and this shows both ways, the one, and the rated pressure specification has only one kind of 25Mpa, and the working pressure of existing 100t crane reaches more than the 32Mpa.The 2nd, the pilot pressure of existing equilibrium valve product is 2.0~3.5Mpa, differ about one times with the output services pressure 0.8~1.8Mpa of the main frame hydraulic control pilot-actuated valve of current trend, cause domestic main computer boxes product-free when the external control equilibrium valve of selecting by the control of hydraulic control pilot valve to select.
The purpose of this utility model is at above-mentioned condition, a kind of new structure equilibrium valve product is provided, it can improve the sealability and the life-span of this product effectively, with oppositely using to adapt to the flexible loop of main frame of raising equilibrium valve that can several times, can also provide the auxiliary products of several different rated pressure grades and pilot pressure grade by flow.
Technical solution:
Technical solution of the present utility model is: with valve pocket and nonreturn valve core be plug-in type one-way valve that even part is formed be installed in the sealability that solves one-way valve on the valve body and sealing life problem; On main valve plug, set up little guide's Pilot operated check valve, sealed high pressure oil is introduced the right chamber of main valve plug, and act on the right side of main valve plug and the sealing surface of main valve plug to be pressed to the valve pocket potted line that cooperates with it, so not only make the sealing force of sealing pair increase and improve, and improved the working condition of spring with the pressure of sealed high pressure oil.For after solution sets up little guide's Pilot operated check valve, pressure step when main valve plug is opened, on control piston, set up servo-actuated by cutting down, make control piston will open little guide's Pilot operated check valve earlier entering the operation point, end-acted when needing big active force by the control piston big column, and in case open when needing less action force to promote main valve plug after high pressure that little guide's Pilot operated check valve makes the right chamber of main valve plug discharges to enter working state its stop valve and close, end-acted by the small column on the control piston, thereby guarantee the continuity of the pilot pressure of this product, guarantee working stability and every dynamic indicator of final felling core.
Description of drawings:
Accompanying drawing 1 is the novel balance valve structural drawing.
The new structure equilibrium valve is made up of one-way valve, primary throttle valve, primary throttle valve control valve and safe overload valve, and they are contained on the same valve body 14.
One-way valve is made of with the check valve spring 31 that its inner chamber is equipped with nonreturn valve core 30 and the one-way valve block set 29 that unidirectional valve pocket 32 and its inner chamber are equipped with.The main valve plug 20 that primary throttle valve is equipped with by valve pocket 15 and its inner chamber, and be contained in the little nonreturn valve core 19 of guide, little check valve spring 26, the orifice plug 25 of main valve plug inner chamber and overlap 22 and formations such as the big spring 21 that is equipped with of inner chamber, spring seat 23.The primary throttle valve control valve is made of intake plug 1 and the control piston 13 that control piston cover 11 and its inner chamber are equipped with, the screw 5 that safe overload valve is equipped with by adjustment seat 36 and its inner chamber, submissile spring abutment 7, pressure adjusting spring 9 and the poppet valve core 12 that is contained in the hole in valve body 14 holes constitute.
The filler opening of one-way valve is connected with the A mouth, and outlet then is communicated with B, and the B mouth is by being communicated with the Seal cage of main valve plug with the vertical hole of one-way valve, and the outlet of primary throttle valve then is communicated with A.The B mouth also is communicated with the inner chamber of overload valve by two apertures that intersect vertically.The exocoel of safe overload valve is communicated with the C mouth by aperture again.
Embodiment:
The utility model further specifies as follows in conjunction with concrete embodiment referring to accompanying drawing 1:
This practical working procedure is: with the hoisting circuit is example, sees that accompanying drawing 1:A mouth connects the selector valve pressure hydraulic fluid port that hoists, and the B mouth connects the oil hydraulic motor filler opening that hoists, and the C mouth connects the oil hydraulic motor oil outlet that hoists.Give pressure oil when the A confession, pressure oil is directly opened nonreturn valve core 30, enters oil hydraulic motor by the B mouth, and drive motor drives reel and enters the operating mode that hoists.This moment, the C mouth did not have pressure oil, and control piston 13 is motionless.Final felling core 20 is closed under the effect of big spring 21 and its right-hand member pressure oil.Hoisting stops, and nonreturn valve core 30 is closed in the effect of pressure oil and check valve spring 31, and this moment, weight was supported by the pressure oil of equilibrium valve institute locking, break braking then.The decline operating mode: the reversible control selector valve also obtains pressure oil simultaneously to oil hydraulic motor filler opening (oil outlet of the operating mode that promptly hoists) the supply pressure oil C mouth in parallel with it that descends.Pressure oil enters the cavity volume that control piston cover 11 and control piston 13 and intake plug 1 are formed rapidly by intake plug 1, and promotion control piston 13 moves right.This moment, the servo-actuated stop valve of control piston 13 small plunger right-hand members was in and A mouth oil return connected state, control piston cover 11 does not have pressure with the cavity volume that control piston 13 is formed, pressure oil acts on the left end large size of The whole control piston 13 and opens the little nonreturn valve core 19 of being closed by the high pressure oil effect, little nonreturn valve core moves to right and has closed its right-hand member and be positioned at aperture on the main valve plug, cut off the passage in hyperbaric chamber and main valve plug 20 right chambeies, the pressure in the right chamber of main valve plug discharges rapidly, then the servo-actuated stop valve on the control piston 13 is closed, active area switches to the small column area rapidly and promotes main valve plug and move to right on the control piston 13, open restriction, pressure oil drains into selector valve outlet by B mouth main valve plug throttle orifice to the A mouth of flowing through, the pressure support that produced by the throttling of main valve plug restriction this moment weight, and it is transferred according to the stability of flow that the operator handles the openings of sizes of selector valve and provides.
The utility model has adopted the little one-way valve 19 of guide to switch the structure of the left and right sides cavity pressure of main valve plug 20.Therefore can adopt the lower spring of stiffness coefficient, help main valve plug 20 returns, and help its sealing, so its pilot pressure can be easily by the adjusting screw adjustment by high pressure oil.Make it to satisfy different pilot pressure specification requirements.
The utility model has adopted the restriction structure of the radially throttling pore of helical arrangement on main valve plug, this throttle structure has guaranteed to act on the pressure autobalance of restriction axial side wall, and can not produce active force to the spool opening direction, and make the power of surging of opening directive effect towards spool reduce to 0, the spring force of balance can significantly reduce with it, so choke area of the present utility model can increase greatly, because flexible equilibrium valve only passes through 1/8 of flow for its primary throttle valve by the flow of one-way valve, so can replace one-way valve by main valve plug, and between main valve plug and control piston, add and be close to logical one-way valve 5 (seeing accompanying drawing 2), the direct oil sump tank of huge flow during with the withdrawal of shunting arm satisfies the flexible loop usage requirement big to the equilibrium valve working flow of main frame.
The utility model has the advantages that: sealing property and life-span greatly improve. Controlled pressure is flat with the control piston reach The steady growth, no step, guaranteeing the dynamic stability of main valve plug, and can be by the adjustment screw adjustment. Leading to of restriction The oil ability is doubled and redoubled.

Claims (1)

1, a kind of novel balance valve, it is by the primary throttle valve control valve, and one-way valve and primary throttle valve constitute, and the inner chamber of one-way valve is communicated with the exocoel of primary throttle valve, and the exocoel of one-way valve is communicated with the hydraulic fluid port of logical fuel tank.The inner chamber of primary throttle valve and logical oil cylinder load-bearing chamber hydraulic fluid port connect brave, its exocoel is communicated with the hydraulic fluid port of logical selector valve, they are installed on the same mechanical integrated package, it is characterized in that: be provided with the one-way valve of the logical fuel tank of an outlet between primary throttle valve control valve and primary throttle valve, one-way valve and primary throttle valve are opened by the control of primary throttle valve control valve jointly.
CN 200320124145 2003-12-30 2003-12-30 Balance valve CN2748677Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200320124145 CN2748677Y (en) 2003-12-30 2003-12-30 Balance valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200320124145 CN2748677Y (en) 2003-12-30 2003-12-30 Balance valve

Publications (1)

Publication Number Publication Date
CN2748677Y true CN2748677Y (en) 2005-12-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200320124145 CN2748677Y (en) 2003-12-30 2003-12-30 Balance valve

Country Status (1)

Country Link
CN (1) CN2748677Y (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101135398B (en) * 2006-08-28 2010-10-13 贺勍 Combining method for returning place force of balanced valve overlapped by seal pressure and spring force
CN101949397A (en) * 2010-10-20 2011-01-19 竺浩君 Balanced valve bank of derricking cylinder system
CN101956734A (en) * 2010-10-21 2011-01-26 吴赛珍 Balance speed regulating integrated valve
CN101629587B (en) * 2009-08-06 2011-05-11 宁波汉商液压有限公司 Hydraulic balance valve
CN104477798A (en) * 2014-12-10 2015-04-01 中联重科股份有限公司 Amplitude-variable control system of main arm of crane and crane
CN104500475A (en) * 2014-12-11 2015-04-08 湘潭大学 Mechanical balance valve with foldable cantilever crane
CN106050784A (en) * 2016-08-14 2016-10-26 宁波市博尔法液压有限公司 Balance valve
CN106949110A (en) * 2017-04-10 2017-07-14 四川长江液压件有限责任公司 A kind of pump flow stabilizing valve
CN112112856A (en) * 2020-10-13 2020-12-22 江苏科迈液压控制系统有限公司 One-way throttling balance valve

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101135398B (en) * 2006-08-28 2010-10-13 贺勍 Combining method for returning place force of balanced valve overlapped by seal pressure and spring force
CN101629587B (en) * 2009-08-06 2011-05-11 宁波汉商液压有限公司 Hydraulic balance valve
CN101949397A (en) * 2010-10-20 2011-01-19 竺浩君 Balanced valve bank of derricking cylinder system
CN101956734A (en) * 2010-10-21 2011-01-26 吴赛珍 Balance speed regulating integrated valve
CN101956734B (en) * 2010-10-21 2012-08-08 宁波广天赛克思液压有限公司 Balance speed regulating integrated valve
CN104477798A (en) * 2014-12-10 2015-04-01 中联重科股份有限公司 Amplitude-variable control system of main arm of crane and crane
CN104477798B (en) * 2014-12-10 2016-08-17 中联重科股份有限公司 The principal arm luffing control system of crane and crane
CN104500475A (en) * 2014-12-11 2015-04-08 湘潭大学 Mechanical balance valve with foldable cantilever crane
CN106050784A (en) * 2016-08-14 2016-10-26 宁波市博尔法液压有限公司 Balance valve
CN106949110A (en) * 2017-04-10 2017-07-14 四川长江液压件有限责任公司 A kind of pump flow stabilizing valve
CN112112856A (en) * 2020-10-13 2020-12-22 江苏科迈液压控制系统有限公司 One-way throttling balance valve

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C19 Lapse of patent right due to non-payment of the annual fee
CF01 Termination of patent right due to non-payment of annual fee
EE01 Entry into force of recordation of patent licensing contract

Assignee: Hunan Yitong Automobile Parts Science and Technology Development Co., Ltd.

Assignor: He Qing|Yang Jie

Contract fulfillment period: 2008.11.28 to 2015.11.28 contract change

Contract record no.: 2008430000062

Denomination of invention: Handle of novel balance valve

Granted publication date: 20051228

License type: Exclusive license

Record date: 20081215

Assignee: Hunan Yitong Automobile Parts Science and Technology Development Co., Ltd.

Assignor: He Qing|Yang Jie

Contract fulfillment period: 2008.11.28 to 2015.11.28

Contract record no.: 2008430000062

Denomination of utility model: Handle of novel balance valve

Granted publication date: 20051228

License type: Exclusive license

Record date: 20081215

LIC Patent licence contract for exploitation submitted for record

Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.11.28 TO 2015.11.28; CHANGE OF CONTRACT

Name of requester: HUNAN YITONG CAR FITTINGS TECHNOLOGY DEVELOPMENT C

Effective date: 20081215