CN205013786U - Permanent fixed pressure -difference valve with adjustable - Google Patents
Permanent fixed pressure -difference valve with adjustable Download PDFInfo
- Publication number
- CN205013786U CN205013786U CN201520639105.1U CN201520639105U CN205013786U CN 205013786 U CN205013786 U CN 205013786U CN 201520639105 U CN201520639105 U CN 201520639105U CN 205013786 U CN205013786 U CN 205013786U
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- valve body
- valve
- pressure
- elastic packing
- subassembly
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Abstract
The utility model provides a permanent fixed pressure -difference valve with adjustable, the hydraulic flow of valve body subassembly intake antrum cross during through -hole on the valve rod support in the case subassembly flows in the plunger tip chamber in the valve body subassembly, and case top spring pressure sum is greater than the pressure regulating spring in water pressure and case subassembly, and elastic diaphragm shifts up the linkage and opens the case at closed condition case subassembly, rivers arrive the water cavity of valve body subassembly, and the water that goes out the water cavity passes through the case subassembly, goes into between valve body subassembly elastic diaphragm and the elastic diaphragm through the orifice flow, and the case in the elastic diaphragm linkage case subassembly moves down and reduces or shut -off valve body group spare switching bit stream body throughput value, makes the intake antrum and go out to keep the constant pressure poor between the water cavity, through rotatory pressure regulating subassembly screw rod handle, increase or pressure differential between intake antrum and the play water cavity is adjusted to the elasticity that reduces the pressure regulating spring, have the decompression function and keep the intake antrum and go out characteristics such as pressure differential developments invariant, compact structure, maintenance convenience, the poor easy operation of adjust pressure between the water cavity.
Description
Technical field
The utility model relates to a kind of adjustable constant pressure difference valve, belongs to pipeline valve control technique field.
Background technique
Pressure difference valve relies on and is automatically adjusted by the change of tune medium pressure itself, the flow deviation that the residual pressure head of automatic elimination pipeline and pressure surge cause, constant user inlet outlet pressure differential.Pressure difference valve is specially adapted in household metering or automatic control system, contributes to stable system and runs.
Pressure difference valve requires that the pressure difference of water-inlet cavity and water chamber is dynamically constant, as: when water-inlet cavity hydraulic pressure is 5KG, water chamber hydraulic pressure is 4KG, and pressure difference is 1KG, and when water-inlet cavity hydraulic pressure reduces to 3KG, water chamber hydraulic pressure is 2KG, and pressure difference is similarly 1KG; Described pressure difference valve also requires the function regulating magnitude of pressure differential, as: the municipal water pressure of different city, different floor is different, some 4KG, some 3KG, some 1.5KG, by regulating pressure difference valve pressure extent, can meet the demand that different municipal water pressure user uses this device; Compact structure, makes whole device compact, attractive in appearance.
In small flow situation, when especially working under viscous fluid and low pressure, the mixed state of the main constraint of fluid laminar flow or laminar flow and turbulent flow often.During laminar flow, before and after the rate-of flow and valve of valve, pressure reduction is linear.And under laminar flow and turbulent closure scheme state, along with the increase of reynolds' number, even if pressure reduction is constant, the medium amount flowing through valve also can increase.When complete turbulent flow, flow does not just change with reynolds' number change.However, select control valve for small flows, still undertaken by traditional method and formula.But its calculated value and actual value depart from very large, according to data introduction when below Cv=0.01, it, just as a capacity performance index, has reference significance.Actual circulation ability should rule of thumb be determined.
Along with negotiability reduces, the regulating ratio of valve will decline.But can ensure at least between 10:l to 15:1, if regulating ratio is little again, just be difficult to the adjustment carrying out flow.
Valve connect use time, along with aperture change, before and after valve, pressure reduction also changes, and therefore makes the characteristic working curve of valve depart from ideal characterisitics.If pipe resistance is large, linarity can become opening characteristic soon, and loses regulating power.Equal percentage characteristics will become linear characteristic.In small flow situation, owing to seldom having pipe resistance, above-mentioned characteristic distortion is just little, to equal percentage characteristics, in fact also just there is no need.From the angle manufactured, during below Cv=0.05, the side view of equal percentage also can not be produced again.Therefore, to the problem that small flow valve is main be how by flow control within required scope.
From economic effect, user wishes that a valve simultaneously for damming and regulating, also can be able to be accomplished.But for modulating valve, mainly realize the control to flow, closedown is secondary.Think that the flow of small flow valve own is very little, being easy to realization when closing and damming, is wrong.Generally regulation be have also been made to control valve for small flows leakage rate abroad.When Cv value is 10, the leakage rate of this valve is defined as: in 3.5 kilograms per centimeter.Under air pressure, leakage rate is less than 1% of peak rate of flow.
Summary of the invention
The purpose of this utility model is to design a kind of adjustable constant pressure difference valve, in pipe control system, to realize producing constant pressure difference between water-inlet cavity and water chamber.
For achieving the above object, the technical solution adopted in the utility model is a kind of adjustable constant pressure difference valve, it is characterized in that: comprise valve component, mangetic core assembly and regulation component; Under valve body in valve component, (1) has water-inlet cavity (12) and water chamber (13), under valve body, (1) seals fixing elastic packing diaphragm b (53) periphery projection with seal groove (11) on (2) surface of contact in valve body, and in valve body, (2) seal fixing elastic packing diaphragm a (22) periphery projection with seal groove (23) on (3) surface of contact on valve body; Valve rod (5) in mangetic core assembly be fixed on valve body under (1) chamber inner valve stem bearing (54) be slidably matched, coordinate with (1) opening and closing position (15) opening and closing under valve body, spool (4) and valve rod (5) the lower thread joint of intermediate throughholes fill cushion rubber (44) and seal, and elastic packing diaphragm b (53) inner bore perimeter projection is fixedly mounted in valve rod (5) seal groove (51) with the screw-thread fit on valve rod (5) top by nut (6); Pressure adjusting spring (65) lower end is arranged in nut (6) restraining groove (61), upper end is arranged in guide rod (62) restraining groove (64) that is slidably matched with valve rod (5) endoporus, and guide rod (62), elastic packing diaphragm a (22), planchet (75) extrude with bolt (74) and contact by the elastic force of pressure adjusting spring (65); In regulation component, handle (7) and internal thread bar (72) are connected and fixed by screw (71), be slidably matched with the feather key (31) of (3) intermediate throughholes on the keyway on the bolt (74) of internal thread bar (72) screw-thread fit and valve body, internal thread bar (72) lower end boss (73) is slidably matched at recess place, (3) top on pressing plate (32) with valve body.
Described valve body is Split type structure, be made up of (3) on (2) in (1), valve body under valve body and valve body, be tightly connected by elastic packing diaphragm b (53) between (2) in (1) and valve body under valve body, be fixed by screw fixing; In valve body, (2) and valve body are tightly connected by elastic packing diaphragm a (22) between (3), are fixed by screw fixing; Elastic packing diaphragm b (53) and elastic packing diaphragm a (22) is continuously folding shape concaveconvex structure by the section in the center of circle; Through hole (55) on stem bearing (54) under (1) water-inlet cavity (12) is screwed in valve body under valve body in (1) chamber is through with plunger tip chamber (16).
In described mangetic core assembly valve body, spool top spring (43) is installed in restraining groove (17) in spool (4) bottom, seal ring (41) is installed in the seal groove of spool (4) middle part coordinate with the upper and lower opening and closing in (1) opening and closing position (15) under valve body, spool (4) upper external thread and valve rod (5) lower internal thread connecting groove place fill cushion rubber (44) fit sealing, nut (6) and pad (52) coordinate with valve rod (5) upper external thread and are fixedly mounted in valve rod (5) seal groove (51) by elastic packing diaphragm b (53) inner bore perimeter projection, pressure adjusting spring (65) lower end is arranged in nut (6) restraining groove (61), upper end is arranged in guide rod (62) restraining groove (64), and guide rod (62), elastic packing diaphragm a (22), planchet (75) extrude with bolt (74) and contact by the elastic force of pressure adjusting spring (65), valve rod (5) slides up and down with bearing (54) and coordinates, and spool (4) positioning ring (42) slides up and down with (1) positioning strip (14) under valve body and coordinates, under valve body, (1) water chamber (13) is through with pressure core chamber (21) by spool (4) central through bore, valve rod (5) central through bore, guide rod (62) center hole and hole (63).
In described regulation component, handle (7) and internal thread bar (72) are connected and fixed by screw (71), internal thread bar (72) and bolt (74) screw-thread fit, internal thread bar (72) lower end boss (73) is slidably matched at recess place, (3) top on pressing plate (32) and valve body, and on the keyway on bolt (74) and valve body, the feather key (31) of (3) intermediate throughholes is slidably matched.
Compared with prior art, the utility model has following beneficial effect.
1, the utility model is by appropriate design, effectively can regulate the pressure difference of water-inlet cavity and water chamber, realize controlling the constant pressure of pipeline.
2, the utility model regulates the dynamically poor of internal pressure by handle, effectively improves the stability of system cloud gray model.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of adjustable constant pressure difference valve of the present utility model.
In figure: 1, lower valve body; 2, middle valve body; 3, upper valve body; 4, spool; 5, valve rod; 6, nut; 7, handle;
11, seal groove a; 12, water-inlet cavity; 13, water chamber; 14, positioning strip; 15, opening and closing position; 16, plunger tip chamber; 17, restraining groove a;
21, core chamber is pressed; 22, elastic packing diaphragm a; 23, seal groove b;
31, feather key; 32, pressing plate;
41, seal ring; 42, positioning ring; 43, spool top spring; 44, cushion rubber;
51, seal groove c; 52, pad; 53, elastic packing diaphragm b; 54, stem bearing; 55, through hole;
61, restraining groove b; 62, guide rod; 63, hole; 64, restraining groove c; 65, pressure adjusting spring;
71, screw; 72, internal thread bar; 73, boss; 74, bolt; 75, planchet.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described further:
As shown in Figure 1, a kind of adjustable constant pressure difference valve, the water of pipeline enters water-inlet cavity (12), plunger tip chamber (16) is entered into by through hole (55), pressure adjusting spring (65) compresses by the hydraulic pressure in plunger tip chamber (16), interlock spool (4) is removed and opens, the water of water-inlet cavity (12) enters water chamber (13) by opening and closing position (15), hydraulic pressure in water chamber (13) raises and passes through spool (4), valve rod (5), the hollow structure of guide rod (62) forms mangetic core assembly central through bore and enters in pressure core chamber (21) through via hole (63), finally act on the pressure sum of the hydraulic pressure on elastic packing diaphragm b (53) and pressure adjusting spring (65) and plunger tip chamber (16) in pressure core chamber (21) to act on elastic packing diaphragm b (53) hydraulic pressure and spool top spring (43) to push up power sum balanced, pressure difference is produced thereupon constant between the water-inlet cavity (12) of difference limen and water chamber (13), rotatable handle (7) makes bolt (74) move up and down the size regulating pressure adjusting spring (65) tension force, produces pressure difference and adjust change thereupon between water-inlet cavity (12) and water chamber (13).
Be tightly connected by elastic packing diaphragm a (22) between described middle valve body (2) and upper valve body (3), avoid like this using the O regular sliding friction of type rubber sealing and cushion rubber is aging causes sealing position run, drip, leak phenomenon.
Described elastic packing diaphragm b (53) and elastic packing diaphragm a (22) can meet bolt in regulation component (74) and valve rod (5) freely up and down moving range to greatest extent, thus increases the regulation range of pressure difference valve difference and strengthen opening and closing position (15) between water-inlet cavity (12) and water chamber (13) and open space.
Described valve rod (5) slides up and down with stem bearing (54) and coordinates, and tentatively location is guided to spool (4), spool (4), positioning ring (42) and lower valve body (1) slide up and down with the positioning strip (14) that mangetic core assembly concentric circle is uniform and coordinate, and installation seal ring (41) and the upper and lower opening and closing of lower valve body (1) opening and closing position (15) in the seal groove of spool (4) middle part are coordinated and more accurately puts in place.
Pressure difference valve original state of the present utility model is seal ring (41) on spool (4) and opening and closing position (15) close contact, enter water-inlet cavity (12) when Pipeline Water and the top power sum that the hydraulic pressure entering into plunger tip chamber (16) by through hole (55) adds upper valve core top spring (43) is greater than pressure adjusting spring (65) pressure time, pressure adjusting spring (65) is compressed, interlock spool (4) is removed and opens, the water of water-inlet cavity (12) enters water chamber (13) by opening and closing position (15).
Water chamber (13) hydraulic pressure raises and passes through mangetic core assembly central through bore and hole (63) and enters in pressure core chamber (21), finally act under elastic packing diaphragm b (53) hydraulic pressure adds the effect of pressure adjusting spring (65) pressure sum in pressure core chamber (21), mangetic core assembly moves down, spool (4) and opening and closing position (15) current throughput are reduced to presses core chamber (21) to act on elastic packing diaphragm b (53) hydraulic pressure to add that pressure adjusting spring (65) pressure sum and plunger tip chamber (16) act on elastic packing diaphragm b (53) hydraulic pressure and add upper valve core top spring (43) and push up power sum when reaching balance, mangetic core assembly keeps motionless, produce pressure difference between the water-inlet cavity (12) of pressure difference valve and water chamber (13) and keep constant, when water pressure fluctuations, mangetic core assembly moves or moves down automatic regulating valve core (4) and the size of opening and closing position (15) current throughput along with the hydraulic pressure in pressure core chamber (21) acts in the change of elastic packing diaphragm b (53) dynamics, makes the pressure difference between the water-inlet cavity of pressure difference valve and water chamber keep dynamically constant.
Rotatable handle (7) makes bolt (74) move up and down the size regulating pressure adjusting spring (65) tension force, produces pressure difference and adjust change thereupon between water-inlet cavity and water chamber.
Claims (4)
1. an adjustable constant pressure difference valve, is characterized in that: comprise valve component, mangetic core assembly and regulation component; Under valve body in valve component, (1) has water-inlet cavity (12) and water chamber (13), under valve body, (1) seals fixing elastic packing diaphragm b (53) periphery projection with seal groove (11) on (2) surface of contact in valve body, and in valve body, (2) seal fixing elastic packing diaphragm a (22) periphery projection with seal groove (23) on (3) surface of contact on valve body; Valve rod (5) in mangetic core assembly be fixed on valve body under (1) chamber inner valve stem bearing (54) be slidably matched, coordinate with (1) opening and closing position (15) opening and closing under valve body, spool (4) and valve rod (5) the lower thread joint of intermediate throughholes fill cushion rubber (44) and seal, and elastic packing diaphragm b (53) inner bore perimeter projection is fixedly mounted in valve rod (5) seal groove (51) with the screw-thread fit on valve rod (5) top by nut (6); Pressure adjusting spring (65) lower end is arranged in nut (6) restraining groove (61), upper end is arranged in guide rod (62) restraining groove (64) that is slidably matched with valve rod (5) endoporus, and guide rod (62), elastic packing diaphragm a (22), planchet (75) extrude with bolt (74) and contact by the elastic force of pressure adjusting spring (65); In regulation component, handle (7) and internal thread bar (72) are connected and fixed by screw (71), be slidably matched with the feather key (31) of (3) intermediate throughholes on the keyway on the bolt (74) of internal thread bar (72) screw-thread fit and valve body, internal thread bar (72) lower end boss (73) is slidably matched at recess place, (3) top on pressing plate (32) with valve body.
2. the adjustable constant pressure difference valve of one according to claim 1, it is characterized in that: described valve body is Split type structure, be made up of (3) on (2) in (1), valve body under valve body and valve body, be tightly connected by elastic packing diaphragm b (53) between (2) in (1) and valve body under valve body, be fixed by screw fixing; In valve body, (2) and valve body are tightly connected by elastic packing diaphragm a (22) between (3), are fixed by screw fixing; Elastic packing diaphragm b (53) and elastic packing diaphragm a (22) is continuously folding shape concaveconvex structure by the section in the center of circle; Through hole (55) on stem bearing (54) under (1) water-inlet cavity (12) is screwed in valve body under valve body in (1) chamber is through with plunger tip chamber (16).
3. the adjustable constant pressure difference valve of one according to claim 1, it is characterized in that: in described mangetic core assembly valve body, spool top spring (43) is installed in restraining groove (17) in spool (4) bottom, seal ring (41) is installed in the seal groove of spool (4) middle part coordinate with the upper and lower opening and closing in (1) opening and closing position (15) under valve body, spool (4) upper external thread and valve rod (5) lower internal thread connecting groove place fill cushion rubber (44) fit sealing, nut (6) and pad (52) coordinate with valve rod (5) upper external thread and are fixedly mounted in valve rod (5) seal groove (51) by elastic packing diaphragm b (53) inner bore perimeter projection, pressure adjusting spring (65) lower end is arranged in nut (6) restraining groove (61), upper end is arranged in guide rod (62) restraining groove (64), and guide rod (62), elastic packing diaphragm a (22), planchet (75) extrude with bolt (74) and contact by the elastic force of pressure adjusting spring (65), valve rod (5) slides up and down with bearing (54) and coordinates, and spool (4) positioning ring (42) slides up and down with (1) positioning strip (14) under valve body and coordinates, under valve body, (1) water chamber (13) is through with pressure core chamber (21) by spool (4) central through bore, valve rod (5) central through bore, guide rod (62) center hole and hole (63).
4. the adjustable constant pressure difference valve of one according to claim 1, it is characterized in that: in described regulation component, handle (7) and internal thread bar (72) are connected and fixed by screw (71), internal thread bar (72) and bolt (74) screw-thread fit, internal thread bar (72) lower end boss (73) is slidably matched at recess place, (3) top on pressing plate (32) and valve body, and on the keyway on bolt (74) and valve body, the feather key (31) of (3) intermediate throughholes is slidably matched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520639105.1U CN205013786U (en) | 2015-08-23 | 2015-08-23 | Permanent fixed pressure -difference valve with adjustable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520639105.1U CN205013786U (en) | 2015-08-23 | 2015-08-23 | Permanent fixed pressure -difference valve with adjustable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205013786U true CN205013786U (en) | 2016-02-03 |
Family
ID=55212390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520639105.1U Withdrawn - After Issue CN205013786U (en) | 2015-08-23 | 2015-08-23 | Permanent fixed pressure -difference valve with adjustable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205013786U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114675A (en) * | 2015-08-23 | 2015-12-02 | 李志刚 | Adjustable constant differential pressure valve |
| CN105736781A (en) * | 2016-04-01 | 2016-07-06 | 上海澳升清洁科技有限公司 | Pressure reduction throttling valve and application method |
| CN106678385A (en) * | 2017-03-08 | 2017-05-17 | 大通互惠集团有限公司 | Self-operated pressure range flow valve and control method thereof |
| WO2021068863A1 (en) * | 2019-10-10 | 2021-04-15 | 浙江鑫帆暖通智控股份有限公司 | Self-balancing pipeline apparatus |
| CN113431904A (en) * | 2020-03-23 | 2021-09-24 | 林庆辉 | Fluid valve integrating opening and closing functions with overflow functions |
| CN113431907A (en) * | 2020-03-23 | 2021-09-24 | 林庆辉 | Fluid valve integrating opening, closing and pressure reducing functions |
-
2015
- 2015-08-23 CN CN201520639105.1U patent/CN205013786U/en not_active Withdrawn - After Issue
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114675A (en) * | 2015-08-23 | 2015-12-02 | 李志刚 | Adjustable constant differential pressure valve |
| CN105736781A (en) * | 2016-04-01 | 2016-07-06 | 上海澳升清洁科技有限公司 | Pressure reduction throttling valve and application method |
| CN106678385A (en) * | 2017-03-08 | 2017-05-17 | 大通互惠集团有限公司 | Self-operated pressure range flow valve and control method thereof |
| CN106678385B (en) * | 2017-03-08 | 2024-02-23 | 福建汇上科技有限公司 | Self-operated pressure interval flow valve and control method thereof |
| WO2021068863A1 (en) * | 2019-10-10 | 2021-04-15 | 浙江鑫帆暖通智控股份有限公司 | Self-balancing pipeline apparatus |
| CN113431904A (en) * | 2020-03-23 | 2021-09-24 | 林庆辉 | Fluid valve integrating opening and closing functions with overflow functions |
| CN113431907A (en) * | 2020-03-23 | 2021-09-24 | 林庆辉 | Fluid valve integrating opening, closing and pressure reducing functions |
| CN113431904B (en) * | 2020-03-23 | 2023-02-17 | 林庆辉 | Fluid valve integrating opening and closing functions with overflow functions |
| CN113431907B (en) * | 2020-03-23 | 2023-03-14 | 林庆辉 | Fluid valve integrating opening, closing and pressure reducing functions |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160203 Effective date of abandoning: 20180223 |