CN102359633A - Water flow servo valve used for constant pressure - Google Patents
Water flow servo valve used for constant pressure Download PDFInfo
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- CN102359633A CN102359633A CN2011102915779A CN201110291577A CN102359633A CN 102359633 A CN102359633 A CN 102359633A CN 2011102915779 A CN2011102915779 A CN 2011102915779A CN 201110291577 A CN201110291577 A CN 201110291577A CN 102359633 A CN102359633 A CN 102359633A
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Abstract
The invention relates to a water flow servo valve used for constant pressure for the purpose of realizing multistage constant pressure irrigation. The servo valve comprises a valve body and a diaphragm, wherein the horizontally positioned diaphragm is used for dividing the valve body into a reference pressure cavity and a water flow induction cavity, and the reference pressure cavity comprises an air outlet hole, a spring, a lead screw and a sliding block; corrosion resistant plates with equal areas respectively cover on the upper surface and the lower surface of the horizontally positioned diaphragm, upper and lower connection rods which are vertical to a diaphragm plane and are located at the upper and lower sides of the diaphragm are connected together and penetrate through the center of the diaphragm so as to be coincided with the perpendicular bisector of the diaphragm; the water flow induction cavity is provided with a water outlet, the lower part of the water flow induction cavity is connected with a water inlet throttling valve, and the lower part of the water inlet throttling valve is a roundness water inlet channel; and the water inlet channel is provided with three guide plates which are perpendicular to a round flow cross section and uniformly arranged on the inner wall of the round water inlet channel, and a cross section variation curve of a water inlet throttling valve core is labeled through calculation or test. The servo valve provided by the invention has the advantages of accurate and reliable constant pressure, full-automatic constant pressure process, simple structure and low investment, and is convenient for installation and use.
Description
Technical field:
The invention belongs to the field irrigation technical field, relate to a kind of constant voltage that is used to realize that multilevel distributed constant voltage is irrigated and use the water flow servovalve.
Background technique:
So-called constant voltage is irrigated, and is meant the water pressure range of irrigation water constant pressure in optimum, a kind of irrigation water supply mode that does not change because of the irrigation water changes in flow rate.It has that uniformity of irrigation water appilcation height, pipe-line equipment are difficult for being damaged, water-saving, energy-conservation and supermatic characteristics.
Constant voltage is irrigated because of the unique advantage that it had, and since units such as (Inst of Agricultural Irrigation, Ministry of Water Conservancy) of Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences in 1984, since China's first constant voltage sprinkling irrigation experimental project is built up in the Jiaxian County, Henan, has obtained developing considerablely.The water supply form that constant voltage is irrigated is gone through air pressure pot type, variable-frequency governor formula, variable-frequency governor and small pneumatic jar convolution, and develops to multifunctional application such as soft start, the anti-water hammer of soft-off and the intelligent direction of controlling.The irrigation method that constant voltage is irrigated, also the sprinkling irrigation from the past develops to microspray irrigation, drip irrigation direction.Progressively formed a flourish important branch of irrigation system.
Existing constant voltage irrigation technique generally is to adopt same water source, the same form of pouring water, same system model with water pressure, single-stage constant voltage.Because can not adapt to most of areas, China rural area; Be the different patterns of farming of operating unit, different scale of operation, Different irrigation mode, land for growing field crops, warmhouse booth and the existing agricultural production management mode of depositing with the unshared housing, greatly limited applying of this advanced technology.
The effective way that solves an above-mentioned difficult problem is to realize that multilevel distributed constant voltage irrigates, and realizes that the most critical equipment that low input, high reliability, the multilevel distributed constant voltage of being convenient to manage are irrigated is that constant voltage is used the water flow servovalve.
Summary of the invention:
The object of the present invention is to provide a kind of constant voltage that is used to realize that low input, high reliability, the multilevel distributed constant voltage of being convenient to manage are irrigated to use the water flow servovalve.
The objective of the invention is to realize like this:
A kind of constant voltage is used the water flow servovalve, comprising: valve body, barrier film, and the barrier film of horizontal positioned is divided into valve body with reference to pressure chamber and water flow sensing chamber two-part; With reference to having in the pressure chamber, air outlet hole, spring, leading screw, slide block, the cross section of leading screw are circular hollow; Last connecting rod is through wherein, and the round slider that circular upright opening is arranged of horizontal positioned is placed in outside the leading screw, and both are connected through the slideway that spirals of slide block endoporus and leading screw outer wall; The top of going up connecting rod in the leading screw of hollow is provided with air outlet hole, and the top of leading screw is provided with the cross gap of interim install adjustment spanner, and the upper and lower faces of the barrier film of horizontal positioned is coated with the corrosion resistant plate that area equates respectively; Perpendicular to diaphragm plane; The upper and lower connecting rod that is positioned at the upper and lower both sides of barrier film connects together, and passes with the perpendicular bisector of barrier film from the center of barrier film to overlap, and the corrosion resistant plate that the fastening screw through upper and lower connecting rod will cover the upper and lower faces of barrier film is pressed on the barrier film; The water flow sensing is provided with water outlet in the chamber; The bottom in water flow sensing chamber connects the water inlet throttle valve, and it is the water inlet throttling valve core that circular water inlet throttle valve seat of level and circular cross section change from small to big from top to bottom that the water inlet throttle valve is provided with flow cross-section, and the water inlet throttling valve core is vertically passed the into circular flow cross-section of level of water throttle valve seat; Overlap with the perpendicular bisector of the circular flow cross-section of level of water inlet throttle valve seat; The big end of water inlet throttling valve core cross section is positioned at into water inlet one side of water throttle valve seat, and the upstream face of water inlet throttling valve core is a circular flat; The area of the following corrosion resistant plate that covers on the barrier film is far longer than the into upstream face of water throttling valve core; The top of water inlet throttling valve core is connected with lower link, and the bottom of water inlet throttle valve is circular intake tunnel, and intake tunnel is provided with three guide plates that are evenly arranged in circular intake tunnel inwall perpendicular to circular flow cross-section.
Constant voltage of the present invention is following with water flow servovalve working principle:
Because the area of the following corrosion resistant plate that covers on the barrier film is far longer than the upstream face of throttling valve core; Generally; The pressure that this upstream face is accepted also is far smaller than the pressure that the following corrosion resistant plate that covers on the barrier film is accepted, and the compression that this upstream face produces can be ignored with reference to the active force of the spring in the pressure chamber.When the user stops water, use water flow to be minimum value, the liquid in the water flow sensing chamber stops to flow, hydrodynamic pressure is zero, and hydrostatic pressure to be maximum value (equal discharge pressure H
Out), at this moment, the pressure that acts on the following corrosion resistant plate that covers on the barrier film is maximum, and the compression of generation (equals H with reference to the active force of the spring in the pressure chamber is maximum
Out* A
p, A
pArea for the following corrosion resistant plate that covers on the barrier film), the displacement that water throttling valve core is into made progress is maximum (to equal the maximum displacement s that water throttling valve core into makes progress
Max, mark is arranged in the accompanying drawing); After the user begins water; Liquid in the water flow sensing chamber has also produced thereupon and has flowed; Part hydrostatic pressure is converted into hydrodynamic pressure, and the pressure that acts on the following corrosion resistant plate that covers on the barrier film is reduced, and the compression of generation also reduces with reference to the active force of the spring in the pressure chamber thereupon; The elastic force of compressed spring obtains part and discharges, and making into, the water throttling valve core moves down from the displacement biggest place that makes progress; The user is big more with water flow; The speed of the flow of fluid in the water flow sensing chamber is just big more; The part that hydrostatic pressure is converted into hydrodynamic pressure is just many more, and the pressure that acts on the following corrosion resistant plate that covers on the barrier film is just few more, and the compression of generation is also more little with reference to the active force of the spring in the pressure chamber; It is just many more that the elastic force of compressed spring obtains discharging, and makes that into the water throttling valve core is just big more from the distance that the displacement biggest place that makes progress moves down.If represent be exactly with mathematic(al) representation:
s＝f(Q)——1
That is, the displacement s of water inlet throttling valve core is the function of user with water flow Q.More particularly, the displacement s of water inlet throttling valve core and user are with water flow Q negative correlation.
Because intake tunnel is connected with the one-level constant-voltage system, intake pressure H
InBe steady state value, constant voltage is to carry out the secondary constant voltage with the purpose of water flow servovalve, and water outlet is connected discharge pressure H with secondary watering equipment (user)
OutAlso be steady state value, constant voltage is with the pressure difference H of the rear and front end of water flow servovalve
In-H
OutAlso be steady state value, constant voltage satisfies relation with the water flow servovalve:
H
in-H
out＝S
uQ
2——2
In the formula, S
uBe the modulus of resistance of constant voltage with the water flow servovalve; Q was the volume flowrate of valve flow body, that is, the user uses water flow Q.Because constant voltage is crossed the size of water resistance with the water flow servovalve, depend primarily on the into size of water throttle valve resistance, S
uCan regard the into modulus of resistance of water throttle valve as.And the modulus of resistance S of water inlet throttle valve
uBe the function of the area A of the flow cross-section of water throttle valve into, that is:
S
u＝f(A)——3
More particularly, the modulus of resistance S of water inlet throttle valve
uThe area A negative correlation of flow cross-section with the water inlet throttle valve.
And the area A of the flow cross-section of water inlet throttle valve is the function of the displacement s of into water throttling valve core, that is:
A＝f(s) ——4
More particularly, the displacement s negative correlation of the area A of the flow cross-section of water inlet throttle valve and water inlet throttling valve core.
With 3,4 replacement, 2 formulas, obtain following formula:
H
in-H
out＝S
u(f(s))Q
2——5
Be transformed to following formula again:
Can find out from 1 formula and 6 formulas: the user all is functions of the displacement s of into water throttling valve core with water flow Q; Promptly; The user is with the variation of water flow Q each time; The displacement s of an all corresponding water inlet throttling valve core, and all corresponding constant voltage of the variation of the displacement s of the throttling valve core of intaking each time is with the modulus of resistance S of water flow servovalve
u(f (s)).
According to 6 formulas, make the pressure difference H of constant voltage with the rear and front end of water flow servovalve
In-H
OutBe steady state value, that is, make constant voltage play the constant voltage effect, only need make the modulus of resistance S of constant voltage with the water flow servovalve with the water flow servovalve
u(f (s)) and user square are inverse relation and get final product with water flow Q's.
Spring adopts following formula to select for use:
F
max＝K×s
max+F
0＝H
out×A
p——7
In the formula, F
MaxBe positioned at the elastic force of maximum compression point for spring; K is the Young's modulus of spring; s
MaxBe the maximum displacement (mark is arranged in the accompanying drawing) that makes progress of water inlet throttling valve core; F
0Initial elastic force for spring; H
OutBe the discharge pressure of constant voltage with the water flow servovalve, that is, and user's water constant pressure value; A
pArea for the following corrosion resistant plate that covers on the barrier film.If selected spring has deviation, that is, and F
MaxH has appearred being not equal to
Out* A
pSituation, can be through regulating the adjusting spanner that is installed in leading screw top cross gap temporarily, rotating threaded shaft makes that slide block is upper and lower to be moved, and compresses or pull-off spring, up to F
MaxEqual H
Out* A
p, unload interim spanner.The purpose of this vernier device is set, and is to be convenient to produce in batches.
The change curve of the circular cross section that changes from small to big from top to bottom of water inlet throttling valve core; Can launch according to 4 formulas and 6 formulas; Obtain the method that also can use test to demarcate, the sample of the change curve of the circular cross section that changes from small to big from top to bottom of the throttling valve core of acquisition water inlet earlier with Calculation Method; Through the method for curve fitting, carry out batch process production again through numerically controlled lathe.
The method that so-called test is demarcated: be at intake tunnel, adding upward pressure is H
InThe [constant that drives of variable-frequency governor, keep H
InBe steady state value, a water tap is installed on water outlet, through the different opening of water tap, analog subscriber is with the variation of water flow.Flow of every output, the radius of the circular cross section through changing the water inlet throttling valve core that flushes with water inlet throttle valve seat level circle water intake makes measured water pressure be stabilized in the discharge pressure steady state value H of design
OutOn.With the radius of the circular cross section of a series of water inlet throttling valve core that obtained as abscissa x; The length travel of corresponding water inlet throttling valve core is as y coordinate y; The line of mapping has just obtained the sample of change curve of the circular cross section that changes from small to big from top to bottom of water inlet throttling valve core.
The present invention has following good effect:
1, constant voltage of the present invention is used the water flow servovalve, because the change curve of water inlet throttling valve core cross section has been carried out calculating or the test demarcation, adds into water guide plate design, and constant voltage accurately and reliably;
2, constant voltage of the present invention is used the water flow servovalve, need not to add to drive and control gear, and constant voltage process is full-automatic, and is simple in structure, drops into low, installation, easy to use;
3, constant voltage of the present invention is used the water flow servovalve, and when higher level's pipeline generation water hammer, water hammer pressure meets water through water inlet throttling valve core circle and is transmitted to spring buffer after accept on the plane, and water hammer harm is effectively contained.
Description of drawings:
Accompanying drawing is that constant voltage of the present invention is with water flow servovalve schematic representation.
Embodiment:
A kind of constant voltage is used the water flow servovalve, shown in accompanying drawing, comprising: valve body 1, barrier film 2; The barrier film 2 of horizontal positioned is divided into valve body 1 with reference to pressure chamber 3 and water flow sensing chamber 4 two-part; With reference to having in the pressure chamber 3, air outlet hole 3-1, spring 3-2, leading screw 3-3, slide block 3-4, the cross section of leading screw 3-3 are circular hollow; Last connecting rod 8-2 is through wherein; The round slider 3-4 that circular upright opening is arranged of horizontal positioned is placed in outside the leading screw 3-3, and both are connected through the slideway that spirals of slide block 3-4 endoporus with leading screw 3-3 outer wall, and the top of going up connecting rod 8-2 among the leading screw 3-3 of hollow is provided with air outlet hole 3-3-1; The top of leading screw 3-3 is provided with the cross gap 3-3-2 of interim install adjustment spanner; The upper and lower faces of the barrier film 2 of horizontal positioned is coated with corrosion resistant plate 2-1, the 2-2 that area equates respectively, and perpendicular to barrier film 2 planes, the upper and lower connecting rod 8-2, the 8-1 that are positioned at barrier film 2 upper and lower both sides connect together; Pass with the perpendicular bisector of barrier film 2 from the center of barrier film 2 and to overlap; Corrosion resistant plate 2-1,2-2 that fastening screw through upper and lower connecting rod 8-2,8-1 will cover the upper and lower faces of barrier film 2 are pressed on the barrier film 2, are provided with water outlet 4-1 in the water flow sensing chamber 4, and the bottom in water flow sensing chamber 4 connects the water inlet throttle valve; It is the water inlet throttling valve core 7 that level circular water inlet throttle valve seat 6 and circular cross section change from small to big from top to bottom that the water inlet throttle valve is provided with flow cross-section; Water inlet throttling valve core 7 is vertically passed the circular flow cross-section of level of water throttle valve seat 6 into, overlaps the big end of throttling valve core 7 cross sections of intaking with the perpendicular bisector of the circular flow cross-section of level of water inlet throttle valve seat 6; Be positioned at into water inlet one side of water throttle valve seat 6; The upstream face 7-1 of water inlet throttling valve core 7 is a circular flat, and the area of the following corrosion resistant plate 2-2 that covers on the barrier film 2 is far longer than the into upstream face 7-1 of water throttling valve core 7, and the top of water inlet throttling valve core 7 is connected with lower link 8-1; The bottom of water inlet throttle valve is circular intake tunnel 5, and intake tunnel 5 is provided with three guide plate 5-1 that are evenly arranged in circular intake tunnel 5 inwalls perpendicular to circular flow cross-section.
Constant voltage of the present invention is following with water flow servovalve working principle:
Shown in accompanying drawing; Because the area of the following corrosion resistant plate 2-2 that covers on the barrier film 2 is far longer than the upstream face 7-1 of throttling valve core 7; Generally; The pressure that this upstream face 7-1 is accepted also is far smaller than on the barrier film 2 pressure that the following corrosion resistant plate 2-2 that covers is accepted, and the compression that this upstream face 7-1 produces can be ignored with reference to the active force of the spring 3-2 in the pressure chamber 3.When the user stops water, use water flow to be minimum value, the liquid in the water flow sensing chamber 4 stop to flow, hydrodynamic pressure is zero, and hydrostatic pressure to be maximum value (equal discharge pressure H
Out), at this moment, the pressure that acts on the following corrosion resistant plate 2-2 that covers on the barrier film 2 is maximum, and the compression of generation (equals H with reference to the active force of the spring 3-2 in the pressure chamber 3 is maximum
Out* A
p, A
pArea for the following corrosion resistant plate 2-2 that covers on the barrier film 2), the displacement that water throttling valve core 7 is into made progress is maximum (to equal the maximum displacement s that water throttling valve core 7 into makes progress
Max, mark is arranged in the accompanying drawing); After the user begins water; Liquid in the water flow sensing chamber 4 has also produced thereupon and has flowed; Part hydrostatic pressure is converted into hydrodynamic pressure, and the pressure that acts on the following corrosion resistant plate 2-2 that covers on the barrier film 2 is reduced, and the compression of generation also reduces with reference to the active force of the spring 3-2 in the pressure chamber 3 thereupon; The elastic force of compressed spring 3-2 obtains part and discharges, and making into, water throttling valve core 7 moves down from the displacement biggest place that makes progress; The user is big more with water flow; The speed of the flow of fluid in the water flow sensing chamber 4 is just big more; The part that hydrostatic pressure is converted into hydrodynamic pressure is just many more, and the pressure that acts on the following corrosion resistant plate 2-2 that covers on the barrier film 2 is just few more, and the compression of generation is also more little with reference to the active force of the spring 3-2 in the pressure chamber 3; It is just many more that the elastic force of compressed spring 3-2 obtains discharging, and makes that into water throttling valve core 7 is just big more from the distance that the displacement biggest place that makes progress moves down.If represent be exactly with mathematic(al) representation:
s＝f(Q) ——1
That is, the displacement s of water inlet throttling valve core 7 is user's functions with water flow Q.More particularly, the displacement s of water inlet throttling valve core 7 and user are with water flow Q negative correlation.
Because intake tunnel 5 is connected with the one-level constant-voltage system, intake pressure H
InBe steady state value, constant voltage is to carry out the secondary constant voltage with the purpose of water flow servovalve, and water outlet 4-1 is connected discharge pressure H with secondary watering equipment (user)
OutAlso be steady state value, constant voltage is with the pressure difference H of the rear and front end of water flow servovalve
In-H
OutAlso be steady state value, constant voltage satisfies relation with the water flow servovalve:
H
in-H
out＝S
uQ
2——2
In the formula, S
uBe the modulus of resistance of constant voltage with the water flow servovalve; Q was the volume flowrate of valve flow body, that is, the user uses water flow Q.Because constant voltage is crossed the size of water resistance with the water flow servovalve, depend primarily on the into size of water throttle valve resistance, S
uCan regard the into modulus of resistance of water throttle valve as.And the modulus of resistance S of water inlet throttle valve
uBe the function of the area A of the flow cross-section of water throttle valve into, that is:
S
u＝f(A)——3
More particularly, the modulus of resistance S of water inlet throttle valve
uThe area A negative correlation of flow cross-section with the water inlet throttle valve.
And the area A of the flow cross-section of water inlet throttle valve is the function of the displacement s of into water throttling valve core 7, that is:
A＝f(s)——4
More particularly, the displacement s negative correlation of the area A of the flow cross-section of water inlet throttle valve and water inlet throttling valve core 7.
With 3,4 replacement, 2 formulas, obtain following formula:
H
in-H
out＝S
u(f(s))Q
2——5
Be transformed to following formula again:
Can find out from 1 formula and 6 formulas: the user all is functions of the displacement s of into water throttling valve core 7 with water flow Q; Promptly; The user is with the variation of water flow Q each time; The displacement s of an all corresponding water inlet throttling valve core 7, and all corresponding constant voltage of the variation of the displacement s of the throttling valve core 7 of intaking each time is with the modulus of resistance S of water flow servovalve
u(f (s)).
According to 6 formulas, make the pressure difference H of constant voltage with the rear and front end of water flow servovalve
In-H
OutBe steady state value, that is, make constant voltage play the constant voltage effect, only need make the modulus of resistance S of constant voltage with the water flow servovalve with the water flow servovalve
u(f (s)) and user square are inverse relation and get final product with water flow Q's.
Spring 3-2 adopts following formula to select for use:
F
max＝K×s
max+F
0＝H
out×A
p——7
In the formula, F
MaxBe positioned at the elastic force of maximum compression point for spring 3-2; K is the Young's modulus of spring 3-2; s
MaxBe the maximum displacement (mark is arranged in the accompanying drawing) that makes progress of water inlet throttling valve core 7; F
0Initial elastic force for spring 3-2; H
OutBe the discharge pressure of constant voltage with the water flow servovalve, that is, and user's water constant pressure value; A
pArea for the following corrosion resistant plate 2-2 of covering on the barrier film 2.If selected spring has deviation, that is, and F
MaxH has appearred being not equal to
Out* A
pSituation, can be through regulating the adjusting spanner that is installed in leading screw 3-3 top cross gap 3-3-2 temporarily, rotating threaded shaft 3-3 makes that slide block 3-4 is upper and lower to be moved, and compresses or pull-off spring 3-2, up to F
MaxEqual H
Out* A
p, unload interim spanner.The purpose of this vernier device is set, and is to be convenient to produce in batches.
The change curve 7-2 of the circular cross section that changes from small to big from top to bottom of water inlet throttling valve core 7; Can launch according to 4 formulas and 6 formulas; Obtain the method that also can use test to demarcate, the sample of the change curve 7-2 of the circular cross section that changes from small to big from top to bottom of the throttling valve core 7 of acquisition water inlet earlier with Calculation Method; Through the method for curve fitting, carry out batch process production again through numerically controlled lathe.
The method that so-called test is demarcated: be at intake tunnel 5, adding upward pressure is H
InThe [constant that drives of variable-frequency governor, keep H
InBe steady state value, a water tap is installed on water outlet 4-1, through the different opening of water tap, analog subscriber is with the variation of water flow.Flow of every output, the radius of the circular cross section through changing the water inlet throttling valve core 7 that flushes with water inlet throttle valve seat 6 levels circle water intake makes measured water pressure be stabilized in the discharge pressure steady state value H of design
OutOn.With the radius of the circular cross section of a series of water inlet throttling valve core 7 that obtained as abscissa x; The length travel of corresponding water inlet throttling valve core 7 is as y coordinate y; The line of mapping has just obtained the sample of change curve 7-2 of the circular cross section that changes from small to big from top to bottom of water inlet throttling valve core 7.
Claims (1)
1. a constant voltage is used the water flow servovalve; It is characterized in that: comprise valve body (1), barrier film (2); The barrier film of horizontal positioned (2) is divided into valve body (1) with reference to pressure chamber (3) and water flow sensing chamber (4) two-part; With reference to having in the pressure chamber (3), air outlet hole (3-1), spring (3-2), leading screw (3-3), slide block (3-4), the cross section of leading screw (3-3) is circular hollow; Last connecting rod (8-2) is through wherein; The round slider that circular upright opening is arranged (3-4) of horizontal positioned is placed in outside the leading screw (3-3), and both are connected through the slideway that spirals of slide block (3-4) endoporus with leading screw (3-3) outer wall, and the top of going up connecting rod (8-2) in the leading screw of hollow (3-3) is provided with air outlet hole (3-3-1); The top of leading screw (3-3) is provided with the cross gap (3-3-2) of interim install adjustment spanner; The upper and lower faces of the barrier film of horizontal positioned (2) is coated with corrosion resistant plate (2-1), (2-2) that area equates respectively, and perpendicular to barrier film (2) plane, the upper and lower connecting rod (8-2), (8-1) that are positioned at the upper and lower both sides of barrier film (2) connect together; Pass with the perpendicular bisector of barrier film (2) from the center of barrier film (2) and to overlap; Corrosion resistant plate (2-1), (2-2) that fastening screw through upper and lower connecting rod (8-2), (8-1) will cover the upper and lower faces of barrier film (2) are pressed on the barrier film (2), are provided with water outlet (4-1) in the water flow sensing chamber (4), and the bottom in water flow sensing chamber (4) connects the water inlet throttle valve; It is the water inlet throttling valve core (7) that circular water inlet throttle valve seat (6) of level and circular cross section change from small to big from top to bottom that the water inlet throttle valve is provided with flow cross-section; Water inlet throttling valve core (7) is vertically passed the circular flow cross-section of level of water throttle valve seat (6) into, overlaps the big end of throttling valve core (7) cross section of intaking with the perpendicular bisector of the circular flow cross-section of level of water inlet throttle valve seat (6); Be positioned at into water inlet one side of water throttle valve seat (6); The upstream face (7-1) of water inlet throttling valve core (7) is a circular flat, and the area that barrier film (2) is gone up the following corrosion resistant plate (2-2) that covers is far longer than the into upstream face (7-1) of water throttling valve core (7), and the top of water inlet throttling valve core (7) is connected with lower link (8-1); The bottom of water inlet throttle valve is circular intake tunnel (5), and intake tunnel (5) is provided with three guide plates (5-1) that are evenly arranged in circular intake tunnel (5) inwall perpendicular to circular flow cross-section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110291577 CN102359633B (en) | 2011-09-30 | 2011-09-30 | Water flow servo valve used for constant pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110291577 CN102359633B (en) | 2011-09-30 | 2011-09-30 | Water flow servo valve used for constant pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102359633A true CN102359633A (en) | 2012-02-22 |
| CN102359633B CN102359633B (en) | 2013-03-27 |
Family
ID=45584999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110291577 Expired - Fee Related CN102359633B (en) | 2011-09-30 | 2011-09-30 | Water flow servo valve used for constant pressure |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105942867A (en) * | 2016-07-21 | 2016-09-21 | 宁波博菱电器有限公司 | Coffee machine waterway constant flow and constant pressure valve |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002023856A (en) * | 2000-07-07 | 2002-01-25 | Fujikura Rubber Ltd | Reducing valve for liquid |
| CN201377631Y (en) * | 2009-04-09 | 2010-01-06 | 浙江永久科技实业有限公司 | Visual-adjustment reducing valve |
| CN202252208U (en) * | 2011-09-30 | 2012-05-30 | 中国农业科学院农田灌溉研究所 | Waterflow servo valve used for constant pressure |
-
2011
- 2011-09-30 CN CN 201110291577 patent/CN102359633B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002023856A (en) * | 2000-07-07 | 2002-01-25 | Fujikura Rubber Ltd | Reducing valve for liquid |
| CN201377631Y (en) * | 2009-04-09 | 2010-01-06 | 浙江永久科技实业有限公司 | Visual-adjustment reducing valve |
| CN202252208U (en) * | 2011-09-30 | 2012-05-30 | 中国农业科学院农田灌溉研究所 | Waterflow servo valve used for constant pressure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105942867A (en) * | 2016-07-21 | 2016-09-21 | 宁波博菱电器有限公司 | Coffee machine waterway constant flow and constant pressure valve |
| CN105942867B (en) * | 2016-07-21 | 2019-01-08 | 宁波博菱电器股份有限公司 | Coffee machine water route constant-current constant-pressure valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102359633B (en) | 2013-03-27 |
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