CN1276189C - Pure water unloading overflow valve - Google Patents
Pure water unloading overflow valve Download PDFInfo
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- CN1276189C CN1276189C CN 200410053553 CN200410053553A CN1276189C CN 1276189 C CN1276189 C CN 1276189C CN 200410053553 CN200410053553 CN 200410053553 CN 200410053553 A CN200410053553 A CN 200410053553A CN 1276189 C CN1276189 C CN 1276189C
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Abstract
The present invention discloses a pure water unloading overflow valve composed of a main pressure control valve and a pure water electromagnetic reversal ball valve, wherein the main pressure control valve is divided into a main valve and a pilot valve; a main valve core is in a secondary throttling conical valve structure with high pressure diversion holes so as to effectively suppress cavitation erosion; a pilot valve core is in a conical valve structure with a damping piston so as to increase motion damping and improve the working stability of the overflow valve; a fixed liquid resistance is arranged in the inlet of the pilot valve so as to increase the constant voltage precision of the overflow valve; the electromagnetic reversal ball valve is driven by a dry DC electromagnet so as to fast switch over through a force amplifying mechanism. The present invention has zero leakage through the direct seal between the valve core and a valve sleeve, and the valve sleeve and a valve body, improves the dynamic and static performance of the overflow valve through the addition of a damper at a valve port, fast unloads through the components, such as the electromagnet, the force amplifying mechanism, etc., which have great thrust force, has the characteristics of high universality, multifunctional integration and convenient standardization, and is suitable for work in the environment with middle and high pressure water media.
Description
Technical field
The present invention relates to the valve class, relate in particular to a kind of pure water unloading overflow valve.
Background technique
The pure water hydraulics technology has the unique advantage of the feature of environmental protection and flame retarding because of it, just be subjected to the extensive attention of countries in the world hydraulic pressure circle, and water hydraulic components also becomes one of key content of research.The pure water unloading overflow valve is one of the most key valve element of hydraulic system, also becomes research emphasis at the research of the unloading overflow valve that is applicable to the pure water hydraulics system.
The off-load of hydraulic system is meant executive component, and when for example oil cylinder, oil motor etc. were not worked, when perhaps not needing whole flow, the fluid that makes all or part of oil pump output was at the dirty oil sump tank of very low pressure, thereby makes oil pump be in idling conditions.Realize that system unloaded can reduce power loss, anti-locking system heating, the working life that can improve oil pump again simultaneously.The off-load of hydraulic system mainly contains two big classes: a class is the not off-load of pressure-retaining system, and another kind of is the off-load of pressure-retaining system.The off-load of so-called pressure-retaining system is meant when guaranteeing that the system works constant pressure is constant, makes the oil pump off-load.When not pressurize of what is called off-load was meant off-load, system pressure was zero, oil pump idle running.In the pure water hydraulics system, because the density of water is big, viscosity is little, the working stability problem of pure water unloading overflow valve is even more serious than oil pressure unloading overflow valve, simultaneously, the leakage rate of pure water unloading overflow valve is tens of times of oil pressure unloading overflow valve under the same conditions, makes the structure of existing oil pressure unloading overflow valve can't be applicable to aqueous medium.
In addition, because the pressure for vaporization height of water make water electrode easily vaporize and boiling, thereby under the same conditions, the cavitation erosion degree that the pure water unloading overflow valve suffers is than the strong hundreds of times of oil pressure unloading overflow valve; Compare with mineral oil, aqueous medium corrosivity is very strong, and the destruction of corrosive action makes prior oil pressure unloading overflow valve material all not be suitable for aqueous medium.
Therefore, how to draw the design experiences of traditional oil pressure unloading overflow valve, overcome the adverse effect that aqueous medium brings, improve the quiet dynamic characteristic of unloading overflow valve, become the key point of pure water unloading overflow valve research.Owing to above reason, it is low that the purpose of patent of the present invention provides a kind of cost, the pressure unloading of system and Minimum operating pressure whole process are adjustable, and it is the pressure controlled valve that integrates pressure regulation, safe off-load, are specially adapted to mesohigh, big flow pure water hydraulics transmission system.
Summary of the invention
The object of the present invention is to provide a kind of pure water unloading overflow valve, be used to improve the quiet dynamic characteristic of unloading overflow valve, realize not having and leak, alleviate phenomenons such as cavitation erosion, corrosion simultaneously, be higher than in being applicable under the aqueous medium environment.
The technical solution adopted for the present invention to solve the technical problems is:
The pure water unloading overflow valve comprises main valve, pilot valve and pure water electromagnetic switch valve, main valve and pilot valve arranged coaxial; Wherein:
1) main valve: comprise main valve body, be contained in the main valve housing in the main valve body opening, main valve plug is the two-step throttle structure, be contained in the main valve housing, from left to right be provided with large through-hole on the main valve plug successively, small through hole and center hole, the resistance of main valve liquid is housed in the main valve plug small through hole, in the main valve plug large through-hole main spool spring is housed, when main valve plug is opened, form the variable restrictor valve port runner of two polyphones between main valve plug and the main valve housing, have water intake and backwater mouth on the main valve body, the liquid flow point of water intake is a two-way, lead up to the main valve plug center hole, main valve liquid resistance is communicated with the main spool spring chamber, and another road is communicated with backwater mouth by the variable restrictor valve port runner of two polyphones forming between main valve plug and the main valve housing, has radial direction through hole in the main valve plug center hole;
2) pilot valve: comprise guide's valve body, have six stepped hole in guide's valve body from left to right successively, guide's valve body from left to right first, two, guide's valve pocket is housed in three holes, be contained in the guide's spool in the pilot valve trepanning, the resistance of pilot valve liquid is housed in the 4th hole, the other end of main valve housing matches with the 6th hole in guide's valve body, the other end of main spool spring withstands on the 5th hole end surface in guide's valve body, in first hole of guide's valve body the pilot valve end cap is housed, in the pilot valve end cap adjustable lever is housed, the pilot valve spring withstands between guide's spool and the adjustable lever, the liquid stream in main spool spring chamber is through the 6th hole of guide's valve body, the 5th hole, the resistance of pilot valve liquid enters the 3rd hole, the radial direction through hole that puts through pilot valve enters pilot valve and puts center hole then, when guide valve core is opened in the ban, form a variable restrictor valve port between guide's spool and the guide's valve pocket, the liquid stream that pilot valve puts in the center hole flows in guide's valve body first hole through settable orifice and guide's valve pocket radial direction through hole, the inclined hole that liquid stream in the pilot valve spring chamber puts by pilot valve flows in guide's valve body first hole, liquid stream is communicated with the main valve water outlet by the runner on guide's valve body in guide's valve body first hole, have radial flow path on the 3rd hole of guide's valve body and first hole, communicate with the water intake and the backwater mouth of pure water electromagnetic switch valve respectively;
3) pure water electromagnetic switch valve:
Right-to-left is equipped with the spring valve pocket that radially has two groups of inclined holes successively in valve body hole, adjust ring, the step post, radially have the four ports valves cover and the two ports valve covers that radially have one group of two inclined hole of one group of four inclined hole, on the spring valve pocket right-hand member roundlet cylinder modulating valve upper shield is housed, the valve pocket lid is pressed in and stretches out on the outer spring valve pocket shoulder of valve body, the force amplificatory structure that the dry type DC electromagnet is housed is pressed in the push rod left side, spring seat one end that is contained in the spring valve pocket withstands on the Returnning spring, the spring seat the other end withstands on and is contained on the ceramic ball of adjusting in the ring, be contained in the step post, one end of the push rod in four ports valves cover and the two ports valves cover withstands on the ceramic ball, and the other end of push rod withstands on the force amplificatory structure;
Valve body lower portion has water intake, backwater mouth, valve body top has the runner that is communicated with two ends, the valve body left and right sides, when the dry type DC electromagnet gets when electric, force amplificatory structure promotes push rod and moves right, ceramic ball and step post leave, liquid stream by water intake, spring valve put left end inclined hole, adjust the inclined hole that ring center hole, step post center hole, four ports valves put, enter backwater mouth, the pure water switch valve can be through-flow; When dry type DC electromagnet dead electricity, Returnning spring promotes spring seat to left movement, and ceramic ball and step post hide, and the pure water switch valve cuts off liquid stream; In the valve working procedure, part liquid stream is arranged through entering the Returnning spring chamber, part liquid stream enters left end push rod chamber through the radially inclined hole that valve flowing channel, two ports valves put, and makes the suffered fluid pressure balance of push rod, spring seat and ceramic ball.
Main valve plug is the two-step throttle structure that has effective inhibition cavitation erosion, reduces noise, reduces to vibrate, and have at the main valve plug center and can influence the high-pressure induct of main flow bundle radial direction through hole, set up the pilot valve liquid resistance that can improve the relief valve setting-pressure accuracy in the pilot valve ingress, resistance of main valve liquid and pilot valve liquid resistance polyphone, guide's spool be for increasing kinetic damping, improve the relief valve working stability, make guide's spool guiding, the cone valve structure of band damping piston that can canting after guaranteeing to open.
With the O-ring seals sealing, with the O-ring seals sealing, seal with O-ring seals between the 6th hole of main valve housing and guide's valve body between main valve housing and the main valve body between main valve plug and the main valve housing; Seal with O-ring seals between guide's valve pocket and the guide's valve body; With the O-ring seals sealing, seal with O-ring seals between adjustable lever and the pilot valve end cap between pilot valve end cap and the guide's valve body.
Seal with O-ring seals between two ports valves cover and the valve body, add the ring washer sealing with O-ring seals between four ports valves cover and the valve body, add the ring washer sealing with O-ring seals between step post and the valve body, with the O-ring seals sealing, add the ring washer sealing with O-ring seals respectively between two ports valve covers, four ports valves cover and the push rod between spring valve pocket and the valve body.
The present invention compares with background technique, and the beneficial effect that has is:
1, main valve plug is the variable restrictor valve port that forms two polyphones between two-step throttle structure and the main valve housing, the pressure drop of relief valve in main valve born by two settable orifices, thereby improved the unloading overflow valve working pressure, so, for reaching same pressure regulation requirement, need by same flow, opening degree must increase, because opening degree increases, flow gain reduces, thereby has improved unloading overflow valve stability; In addition, have the high-pressure induct hole at the center, utilize the high-pressure induct bundle to influence the main flow bundle, can effectively suppress cavitation erosion, reduce noise, reduce vibration.
2, set up the liquid resistance in the pilot valve ingress, make and not only can improve resistance of main valve liquid and first drain resistance polyphone the unloading overflow valve setting-pressure accuracy, and can avoid elongated hole liquid capacitance-resistance to be prone to blocking problem; Guide's spool is the cone valve structure of band damping piston, thereby this piston can not only increase the working stability that kinetic damping improves unloading overflow valve, can also make guide's spool guiding, can canting after guaranteeing to open.
3, the pure water electromagnetic switch valve adopts the covering between ceramic ball spool and the step post or leaves and realize that the liquid circulation is disconnected, can realize not having and leak, because carrying out break-make by ceramic ball switches, the stroke of ceramic ball is exactly the opening amount of pure water electromagnetic switch valve, thereby stroke is short, shorten opening and resetting time of pure water electromagnetic switch valve greatly, improved reaction velocity;
4, between main valve plug and the main valve housing, between main valve housing and the main valve body, between main valve housing and the guide's valve body, between guide's valve pocket and the guide's valve body, between pilot valve end cap and the guide's valve body, between adjustable lever and the pilot valve end cap and the valve body and the valve pocket of pure water electromagnetic switch valve, all directly seal between valve pocket and the push rod with O-ring seals, efficiently solve the pure water unloading overflow valve and leak serious problem, the reasonable Arrangement of pure water electromagnetic switch valve runner makes push rod and the suffered fluid pressure balance of ceramic ball, can guarantee that the flexible movements of ball valve core are reliable, be applicable to the mesohigh operating conditions.
5, the main valve inner flow passage of particular design and valve pocket structure help alleviating the harm that cavitation erosion brings.For preventing cavitation erosion, utilize flow field simulation that the main valve inner flow passage has been carried out optimal design, can make current smooth more, alleviated cavitation erosion and flow noise, all elements of valve are equal to adopt anti-corrosion non-corrosive material, can guarantee that valve has the long life-span.
6, simple structure of the present invention, flexible movements are reliable, and it is good to have versatility, is easy to standardized characteristics, is applicable to the mesohigh operating conditions.
Description of drawings
Fig. 1 is a structural principle schematic representation of the present invention;
Fig. 2 is the structural principle enlarged diagram of pure water electromagnetic switch valve among Fig. 1.
Among the figure: the 1st, main valve body, the 2nd, main valve housing, the 3rd, O-ring seals, the 4th, the resistance of main valve liquid, the 5th, main valve plug, the 6th, O-ring seals, the 7th, back-up ring, the 8th, O-ring seals, the 9th, back-up ring, the 10th, O-ring seals, the 11st, main spool spring, the 12nd, the resistance of pilot valve liquid, the 13rd, guide's valve body, the 14th, O-ring seals, the 15th, back-up ring, the 16th, guide's valve pocket, the 17th, guide's spool, the 18th, the pilot valve end cap, the 19th, the pilot valve spring, the 20th, spring pad, the 21st, pad, the 22nd, adjustable lever, the 23rd, nut, the 24th, back-up ring, the 25th, O-ring seals, the 26th, nut, the 27th, back-up ring, the 28th, O-ring seals, the 29th, steel is stifled, the 30th, O-ring seals, the 31st, O-ring seals, the P mouth is a water intake, the O mouth is a water outlet, A is a main valve, B is a pilot valve, the 32nd, O-ring seals, the 33rd, O-ring seals, the 34th, O-ring seals, the 35th, back-up ring, the 36th, O-ring seals, the 37th, spring seat, the 38th, Returnning spring, the 39th, O-ring seals, the 40th, the valve pocket lid, the 41st, the spring valve pocket, the 42nd, adjust ring, the 43rd, ceramic ball, the 44th, the step post, 45 is four ports valve covers, the 46th, O-ring seals, the 47th, back-up ring, the 48th, ball is stifled, the 49th, the dry type DC electromagnet, the 50th, push rod, the 51st, O-ring seals, the 52nd, back-up ring, 53 is two ports valve covers, the 54th, socket head screw, the 55th, force amplificatory structure, the 56th, valve body, the P mouth is a water intake, the O mouth is a backwater mouth, A is a main valve, B is a pilot valve, G is a runner, H is the pure water electromagnetic switch valve, P1 is a water intake, O1 is a backwater mouth.
Embodiment
The pure water unloading overflow valve comprises main valve A, pilot valve B and pure water electromagnetic switch valve H, main valve A and pilot valve B arranged coaxial, wherein:
1) main valve A: comprise main valve body 1, be contained in the main valve housing 2 in main valve body 1 hole, main valve plug 5 is the two-step throttle structure, be contained in the main valve housing 2, main valve liquid resistance 4 is housed in main valve plug 5 small through hole, in main valve plug 5 large through-holes main spool spring 11 is housed, when main valve plug 5 is opened, form the variable restrictor valve port runner a of two polyphones between main valve plug 5 and the main valve housing 2, have water intake P and backwater mouth O on the main valve body 1, the liquid flow point of water intake P is a two-way, lead up to main valve plug center hole c, main valve liquid resistance 4 is communicated with the main spool spring chamber, another road is communicated with backwater mouth O by the variable restrictor valve port runner a of two polyphones of formation between main valve plug 5 and the main valve housing 2, has radial direction through hole b in main valve plug 5 center hole c;
2) pilot valve B: comprise guide's valve body 13, have six stepped hole in guide's valve body 13 from left to right successively, guide's valve body 13 from left to right first, two, guide's valve pocket 16 is housed in three holes, be contained in the guide's spool 17 in guide's valve pocket 16 holes, pilot valve liquid resistance 12 is housed in the 4th hole, the other end of main valve housing 2 matches with the 6th hole in guide's valve body 13, the other end of main spool spring 11 withstands on the 5th hole end surface in guide's valve body 13, in first hole of guide's valve body 13 pilot valve end cap 18 is housed, adjustable lever 22 is housed in the pilot valve end cap 18, pilot valve spring 19 withstands between guide's spool 17 and the adjustable lever 22, the liquid stream in main spool spring chamber is through the 6th hole of guide's valve body 1, the 5th hole, pilot valve liquid resistance 12 enters the 3rd hole, enter center hole f on guide's valve pocket 16 through the radial direction through hole m on guide's valve pocket 16 then, when guide valve core 17 is opened in the ban, form a variable restrictor valve port between guide's spool 17 and the guide's valve pocket 16, liquid stream on guide's valve pocket 16 in the center hole f flows in guide's valve body first hole through settable orifice and guide's valve pocket 16 radial direction through hole n, liquid stream in the pilot valve spring chamber flows in guide's valve body first hole by the inclined hole i on guide's valve pocket 16, liquid stream is communicated with main valve water outlet O by the runner g on guide's valve body in guide's valve body 13 first holes, have radial flow path on the 3rd hole of guide's valve body 13 and first hole, communicate with water intake P1 and the backwater mouth O1 of pure water electromagnetic switch valve H respectively;
3) pure water electromagnetic switch valve H:
Right-to-left is equipped with the spring valve pocket 41 that radially has two groups of inclined holes successively in valve body 56 holes, adjust ring 42, step post 44, two ports valves that radially have the four ports valves cover 45 of one group of four inclined hole and radially have one group of two inclined hole overlap 53, on the spring valve pocket 41 right-hand member roundlet cylinders modulating valve upper shield 40 is housed, valve pocket lid 40 is pressed on spring valve pocket 41 shoulders that stretch out outside the valve body 56, the force amplificatory structure 55 that dry type DC electromagnet 49 is housed is pressed in push rod 50 left sides, spring seat 37 1 ends that are contained in the spring valve pocket 41 withstand on the Returnning spring 38, spring seat 37 the other ends withstand on and are contained on the ceramic ball of adjusting in the ring 42 43, be contained in step post 44, one end of the push rod 50 in four ports valves cover, the 45 and two ports valves cover 53 withstands on the ceramic ball 43, and the other end of push rod 50 withstands on the force amplificatory structure 55;
Valve body 56 bottoms have water intake P1, backwater mouth O1, valve body 56 tops have the runner G that is communicated with two ends, valve body 56 left and right sides, when dry type DC electromagnet 49 when electric, force amplificatory structure 55 promotes push rod 50 and moves right, ceramic ball 43 is left with step post 44, liquid stream overlaps the inclined hole on 45 by inclined hole, adjustment ring 42 center holes, step post 44 center holes, four ports valves of left end on water intake P1, the spring valve pocket 41, enters backwater mouth O1, and the pure water switch valve can be through-flow; When dry type DC electromagnet 49 dead electricity, Returnning spring 38 promotes spring seat 37 to left movement, and ceramic ball 43 hides with step post 44, and the pure water switch valve cuts off liquid stream; In the valve working procedure, part liquid stream is arranged through entering the Returnning spring chamber, part liquid stream enters left end push rod chamber through the radially inclined hole on valve flowing channel G, the two ports valves cover 53, makes the suffered fluid pressure balance of push rod, spring seat and ceramic ball.
The pure water unloading overflow valve, the two-step throttle structure of its main valve plug 5 for having effective inhibition cavitation erosion, reducing noise, reduce to vibrate, and have at main valve plug 5 centers and can influence the high-pressure induct of main flow bundle radial direction through hole b, set up the pilot valve liquid resistance 12 that can improve the relief valve setting-pressure accuracy in pilot valve B ingress, resistance 4 of main valve liquid and pilot valve liquid resistance 12 polyphones, guide's spool 17 be for increasing kinetic damping, improve the relief valve working stability, make guide's spool 17 guiding, the cone valve structure of band damping piston that can canting after guaranteeing to open.
The pure water unloading overflow valve has following sealing configuration:
With O-ring seals 8 sealings, respectively with O-ring seals 3 and O-ring seals 6 sealings, use O-ring seals 10 sealings between the 6th hole of main valve housing 2 and guide's valve body 13 between main valve housing 2 and the main valve body 1 between main valve plug 5 and the main valve housing 2; Seal with O-ring seals 14 between guide's valve pocket 16 and the guide's valve body 13; With O-ring seals 28 sealings, seal with O-ring seals 25 between adjustable lever 22 and the pilot valve end cap 18 between pilot valve end cap 18 and the guide's valve body 13.
Seal with O-ring seals 32 between two ports valves cover 53 and the valve body 56, add the ring washer sealing with O-ring seals 33 between four ports valves cover 45 and the valve body 56, add ring washer 3 with O-ring seals 36 between step post 44 and the valve body 56) sealing, with O-ring seals 39 sealing, add ring washer 52 and seal ring 46 with O-ring seals 51 respectively between two ports valves cover, 53, four ports valves cover 45 and the push rod 50 and add ring washer 47 and seal between spring valve pocket 41 and the valve body 56.
The rated working pressure of this valve is 14MPa (maximum service pressure is 21MPa), and rated flow is 120L/min.
Employing have two-step throttle and high-pressure induct structure the taper main valve plug, have the pilot poppet valve core of damping piston, set up the liquid resistance in the pilot valve ingress, make resistance of main valve liquid and first drain resistance polyphone improve the unloading overflow valve setting-pressure accuracy, adopt the pure water electromagnetic switch valve as the unloading overflow valve controlled stage, carry out break-make by ceramic ball and switch, the non-corrosive material of seal form and special processing combination reliably is the characteristics of this valve.
When dry type DC electromagnet 49 when electric, force amplificatory structure 55 promotes push rod 50 and moves right, ceramic ball 43 is left with step post 44, the liquid stream that is entered by main intake valve P passes through the main valve plug center hole, main valve liquid resistance 4, the main spool spring chamber, elder generation's drain resistance 12 enters guide's valve pocket, enter the water intake P1 of pure water electromagnetic switch valve H by the runner of offering on guide's valve body, and the inclined hole by right-hand member on the spring valve pocket 41, adjust ring 42 center holes, step post 44 center holes, inclined hole on the four ports valves cover 45, enter backwater mouth O1, and runner by offering on guide's valve body, enter runner g, flowed out by main valve backwater mouth O at last, this moment, the pure water unloading overflow valve played the unloading valve effect; When dry type DC electromagnet 49 dead electricity, Returnning spring 38 promotes spring seat 37 to left movement, ceramic ball 43 hides with step post 44, the pure water switch valve cuts off liquid stream, the pure water unloading overflow valve plays the relief valve effect, pilot valve spring 19 is used to set up relief valve pressure, and main spool spring 11 is used for main valve plug 5 is pressed against main valve housing 2, makes primary valve close; When the pressure of main intake valve P reaches the relief valve set pressure, liquid stream is by the main valve plug center hole, main valve liquid resistance 4, the main spool spring chamber, elder generation's drain resistance 12 enters guide's valve pocket, overcome the spring force of pilot valve spring 19, make guide's spool 17 open, form a variable restrictor valve port between guide's spool 17 and the guide's valve pocket 16, the relief valve overflow, liquid stream forms pressure reduction at the main valve plug two ends simultaneously, main valve plug 5 is opened, form the variable restrictor valve port of two polyphones between main valve plug 5 and the main valve housing 2, liquid stream arrives main valve backwater mouth O through the shaped flow channel that forms between main valve plug 5 and the main valve housing 2.
This valve adopts socket head screw to connect main valve body 1 and guide's valve body 13, and main valve plug 5 is contained in the main valve body 1, and main valve housing 2 is contained in main valve body 1 center, and main spool spring 11 is pressed against main valve plug 5 on the main valve housing 2.Main valve body 1 lower end has water intake P and water outlet O, and both are interconnected by main valve plug 5 and the shaped flow channel that main valve housing 2 forms, and intake-outlet adopts board-like connection, and O-ring seals 31 is sealed into water outlet when being used for board-like connection.Add back-up ring 9 sealings by O-ring seals 8 between main valve plug 5 and the main valve housing 2, the form that this employing Sealing directly seals is good in high pressure water ambient condition lower seal performance.Form the variable restrictor valve port of two polyphones between main valve plug 5 and the main valve housing 2, make valve port pressure reduction bear jointly by two restrictions, shaped flow channel between main valve plug 5 and the main valve housing 2 is optimized design, make current smooth more, can reduce the possibility that cavitation erosion takes place greatly, have the high-pressure induct hole at main valve plug 5 centers, utilize the high-pressure induct bundle to influence the main flow bundle, can effectively suppress cavitation erosion, reduce noise, reduce vibration.The pilot-operated water hydraulic relief valve of being developed relies on guide's spring 19 to carry out pressure regulation, turn nut 23,22 motions of nut 23 compressing adjustable levers, adjustable lever 22 compression guide springs 19, regulating system pressure change.Pilot valve B ingress is provided with first drain resistance 12, liquid stream arrives the pilot valve outlet by first drain resistance 12, guide's spool 17 with the settable orifice that guide's valve pocket 16 forms, seal with O-ring seals 30 in the pilot valve outlet port, the pilot valve outlet communicates with the main valve outlet, belong to the internal control internal drainage type, drain port outside having on pilot valve B is generally used plug 29 shutoff.
Claims (3)
1, a kind of pure water unloading overflow valve is characterized in that comprising main valve (A), pilot valve (B) and pure water electromagnetic switch valve (H), main valve (A) and pilot valve (B) arranged coaxial, wherein:
1) main valve (A): comprise main valve body (1), be contained in the main valve housing (2) in main valve body (1) hole, main valve plug (5) is the two-step throttle structure, be contained in the main valve housing (2), from left to right be provided with large through-hole on the main valve plug (5) successively, small through hole and center hole, main valve liquid resistance (4) is housed in main valve plug (5) small through hole, in main valve plug (5) large through-hole main spool spring (11) is housed, when main valve plug (5) is opened, form the variable restrictor valve port runner (a) of two polyphones between main valve plug (5) and the main valve housing (2), have water intake (P) and backwater mouth (O) on the main valve body (1), the liquid flow point of water intake (P) is a two-way, lead up to main valve plug center hole (c), main valve liquid resistance (4) is communicated with the main spool spring chamber, another road is communicated with backwater mouth (O) by the variable restrictor valve port runner (a) of two polyphones of formation between main valve plug (5) and the main valve housing (2), has radial direction through hole (b) in main valve plug (5) center hole (c);
2) pilot valve (B): comprise guide's valve body (13), have six stepped hole in guide's valve body (13) from left to right successively, guide's valve body (13) from left to right first, two, guide's valve pocket (16) is housed in three holes, be contained in the guide's spool (17) in guide's valve pocket (16) hole, pilot valve liquid resistance (12) is housed in the 4th hole, the other end of main valve housing (2) matches with the 6th hole in guide's valve body (13), the other end of main spool spring (11) withstands on the 5th hole end surface in guide's valve body (13), pilot valve end cap (18) is housed in first hole of guide's valve body (13), pilot valve end cap (18), in adjustable lever (22) is housed, pilot valve spring (19) withstands between guide's spool (17) and the adjustable lever (22), the liquid stream in main spool spring chamber is through the 6th hole of guide's valve body (1), the 5th hole, pilot valve liquid resistance (12) enters the 3rd hole, the radial direction through hole (m) that passes through then on guide's valve pocket (16) enters upward center hole (f) of guide's valve pocket (16), when guide valve core (17) is opened in the ban, form a variable restrictor valve port between guide's spool (17) and the guide's valve pocket (16), the liquid stream that guide's valve pocket (16) is gone up in the center hole (f) flows in guide's valve body first hole through settable orifice and guide's valve pocket (16) radial direction through hole (n), liquid stream in the pilot valve spring chamber flows in guide's valve body first hole by the inclined hole (i) on guide's valve pocket (16), liquid stream is communicated with main valve water outlet (O) by the runner (g) on guide's valve body in guide's valve body (13) first holes, have radial flow path on the 3rd hole of guide's valve body (13) and first hole, communicate with water intake (P1) and the backwater mouth (O1) of pure water electromagnetic switch valve (H) respectively;
3) pure water electromagnetic switch valve (H):
Right-to-left is equipped with the spring valve pocket (41) that radially has two groups of inclined holes successively in valve body (56) hole, adjust ring (42), step post (44), radially have four ports valve covers (45) of one group of four inclined hole and radially have two ports valve covers (53) of one group of two inclined hole, on spring valve pocket (41) the right-hand member roundlet cylinder modulating valve upper shield (40) is housed, valve pocket lid (40) is pressed in and stretches out on outer spring valve pocket (41) shoulder of valve body (56), the force amplificatory structure (55) that dry type DC electromagnet (49) are housed is pressed in push rod (50) left side, spring seat (37) one ends that are contained in the spring valve pocket (41) withstand on the Returnning spring (38), spring seat (37) the other end withstands on and is contained on the ceramic ball of adjusting in the ring (42) (43), be contained in step post (44), one end of the push rod (50) in four ports valve covers (45) and the two ports valve covers (53) withstands on the ceramic ball (43), and the other end of push rod (50) withstands on the force amplificatory structure (55);
Valve body (56) bottom has water intake (P1), backwater mouth (O1), valve body (56) top has the runner (G) that is communicated with valve body (56) two ends, the left and right sides, when dry type DC electromagnet (49) when electric, force amplificatory structure (55) promotes push rod (50) and moves right, ceramic ball (43) is left with step post (44), inclined hole, adjustment that liquid stream is gone up left end by water intake (P1), spring valve pocket (41) encircle the inclined hole on (42) center hole, step post (44) center hole, the four ports valve covers (45), enter backwater mouth (O1), the pure water switch valve can be through-flow; When dry type DC electromagnet (49) dead electricity, Returnning spring (38) promotes spring seat (37) to left movement, and ceramic ball (43) hides with step post (44), and the pure water switch valve cuts off liquid stream; In the valve working procedure, part liquid stream is arranged through entering the Returnning spring chamber, part liquid stream enters left end push rod chamber through the radially inclined hole on valve flowing channel (G), the two ports valve covers (53), makes the suffered fluid pressure balance of push rod, spring seat and ceramic ball.
2, a kind of pure water unloading overflow valve according to claim 1, it is characterized in that main valve plug (5) is for having effective inhibition cavitation erosion, reduce noise, the two-step throttle structure that reduces to vibrate, and have at main valve plug (5) center and can influence the high-pressure induct of main flow bundle radial direction through hole (b), set up the pilot valve liquid resistance (12) that can improve the relief valve setting-pressure accuracy in pilot valve (B) ingress, main valve liquid resistance (4) and pilot valve liquid resistance (12) polyphone, guide's spool (17) is for can increase kinetic damping, improve the relief valve working stability, make guide's spool (17) guiding, the cone valve structure of band damping piston that can canting after guaranteeing to open.
3, a kind of pure water unloading overflow valve according to claim 1 is characterized in that:
1) seals with O-ring seals (8) between main valve plug (5) and the main valve housing (2), use the sealing of O-ring seals (3) and O-ring seals (6) between main valve housing (2) and the main valve body (1) respectively, seal with O-ring seals (10) between the 6th hole of main valve housing (2) and guide's valve body (13); Seal with O-ring seals (14) between guide's valve pocket (16) and the guide's valve body (13); With O-ring seals (28) sealing, seal with O-ring seals (25) between adjustable lever (22) and the pilot valve end cap (18) between pilot valve end cap (18) and the guide's valve body (13).
2) seal with O-ring seals (32) between two ports valve covers (53) and the valve body (56), add the ring washer sealing with O-ring seals (33) between four ports valve covers (45) and the valve body (56), add ring washer (35) sealing with O-ring seals (36) between step post (44) and the valve body (56), usefulness O-ring seals (39) sealing between spring valve pocket (41) and the valve body (56) uses O-ring seals (51) to add ring washer (52) respectively between two ports valve covers (53), four ports valve covers (45) and the push rod (50) and seal ring (46) adds ring washer (47) sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410053553 CN1276189C (en) | 2004-08-04 | 2004-08-04 | Pure water unloading overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410053553 CN1276189C (en) | 2004-08-04 | 2004-08-04 | Pure water unloading overflow valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1587718A CN1587718A (en) | 2005-03-02 |
| CN1276189C true CN1276189C (en) | 2006-09-20 |
Family
ID=34602912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410053553 Expired - Fee Related CN1276189C (en) | 2004-08-04 | 2004-08-04 | Pure water unloading overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1276189C (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839259B (en) * | 2009-03-18 | 2013-03-06 | 卢志刚 | Two-way directional cartridge valve having throttling and braking functions |
| CN102062244A (en) * | 2010-11-11 | 2011-05-18 | 浙江亚特电器有限公司 | Novel overflow valve |
| CN102635586B (en) * | 2012-04-10 | 2014-04-30 | 大连海事大学 | Pure water piezoelectric ceramic driven reversing valve |
| CN103573735B (en) * | 2013-11-14 | 2015-09-16 | 浙江大学 | Guide's heavy traffic load control valve of application displacement-force feedback principle |
| CN103603846A (en) * | 2013-11-28 | 2014-02-26 | 常德中联重科液压有限公司 | Damping plug, valve and engineering machine |
| CN103742473B (en) * | 2013-12-31 | 2015-12-09 | 浙江大学 | Split type pilot load control valve |
| CN105221755B (en) * | 2014-07-02 | 2019-04-05 | 浙江师范大学 | A kind of cone valve type direct acting big flow water valve with damping piston |
| CN105805073B (en) * | 2016-05-29 | 2017-08-25 | 浙江大学 | A kind of plug-in overflow valve main valve that there is orientation to damp |
| CN110939625A (en) * | 2018-09-27 | 2020-03-31 | 吴玉芳 | Valve body of unloading overflow valve |
| CN110242753A (en) * | 2019-04-29 | 2019-09-17 | 杭州电子科技大学 | A kind of steam turbine emergency hand-operated valve |
| CN110748520B (en) * | 2019-09-19 | 2021-03-30 | 山东科技大学 | Needle gauge restrictor |
| CN110657267B (en) * | 2019-11-15 | 2021-02-02 | 临沂市宇顺机械有限公司 | Unloading valve with overflow function |
| CN114087249B (en) * | 2021-11-18 | 2023-05-26 | 国能神东煤炭集团有限责任公司 | Electrohydraulic pressure control system and control method |
| CN114413053B (en) * | 2022-01-24 | 2022-11-11 | 华中科技大学 | Water-based proportional pilot valve |
-
2004
- 2004-08-04 CN CN 200410053553 patent/CN1276189C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1587718A (en) | 2005-03-02 |
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Granted publication date: 20060920 Termination date: 20120804 |