CN2130991Y - Double guide type pressure reducing valve - Google Patents
Double guide type pressure reducing valve Download PDFInfo
- Publication number
- CN2130991Y CN2130991Y CN 92215752 CN92215752U CN2130991Y CN 2130991 Y CN2130991 Y CN 2130991Y CN 92215752 CN92215752 CN 92215752 CN 92215752 U CN92215752 U CN 92215752U CN 2130991 Y CN2130991 Y CN 2130991Y
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- China
- Prior art keywords
- valve
- bellows
- cavity
- main
- air intake
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Fluid-Driven Valves (AREA)
Abstract
The utility model discloses a double-guide type pressure reducing valve, which is characterized in that an exhausting control valve is arranged on the outlet cavity of a main valve of an ordinary guide type pressure reducing valve to replace an ordinary guide type exhausting pin valve and control the exhausting control valve to open and close; an unchangeable pin valve orifice is replaced, and the stability of the downstream pressure of the pressure reducing valve is improved.
Description
The utility model relates to a kind of reduction valve, particularly a kind of pair of piloted reducer.
Stablize for the downstream pressure that keeps reduction valve in the existing industry, adopt air inlet control pilot valve formula reduction valve, during work, downstream pressure reduces, the pilot valve outlet strengthens, high-pressure working medium enters main valve diaphragm top cavity through pilot valve before the main valve valve, pressure spring, with main valve open, high-pressure working medium makes downstream pressure rise to equilibrium value, according to this pressure stability behind the maintaining valve after main valve enters valve before the valve, after adjusting was finished, the surplus gas of pressure of main valve diaphragm top cavity was arranged to atmosphere from the trifle discharge orifice of needle-valve.During work, downstream pressure raises, the pilot valve outlet reduces, and working medium flow reduces, the pressure reduction owing to the exhaust of needle-valve throttle orifice of main valve diaphragm top cavity, diaphragm is under spring action, spool moves up, and the main valve flow area reduces, and power pressure reduces gradually behind the valve, set equilibrium of forces, pressure stability behind the maintaining valve according to this up to spring.The top exhaust of the main valve diaphragm of this valve is the throttle orifice that relies on needle-valve, and the size of throttle orifice directly influences the stable of power pressure behind the valve.Throttle orifice is little, and pressure has reduction slightly behind the main valve, and after the pilot valve effect, the main valve diaphragm top is boosted fast, and main valve can obtain big open degree rapidly, and it is stable that downstream pressure is risen; But when pressure behind the main valve raise, because of throttle orifice is little, main valve diaphragm top pressure release was slow, and the main valve closing motion is slow, and pressure is difficult for descending behind the main valve, causes the downstream pressure instability.If throttle orifice is big, situation and above-mentioned opposite, when downstream pressure was high slightly, it will make main valve close quickly; But when downstream pressure is on the low side, but be difficult to make its rising, therefore, this structure can't find a constant aperture, can be when the main valve downstream pressure is on the low side, can make its rapid rising, and when the main valve downstream pressure is too high, can make its timely reduction again, when design, can only take into account the two requirement, thereby the downstream pressure instability of this reduction valve, performance is not good.
The purpose of this utility model is that a kind of improved piloted reducer will be provided, and it can make the downstream pressure of main valve obtain good stable.
The purpose of this utility model is achieved in that at reduction valve and is provided with on the basis of air inlet control pilot valve, sets up the pilot valve of exhaust control, makes reduction valve be the structure of two pilot valves, and the ante-chamber of gas exhausting valve and the back cavity of air intake control valve are communicated with.The back cavity of gas exhausting valve has an open to atmosphere outlet, the valve core upper sleeve of this valve has adjusting screw rod, screw thread on the screw rod cooperates with screw on the nut, nut is fixed on the valve casing of gas exhausting valve, gas exhausting valve spring one end is pressed on the top flange of adjusting screw rod, the other end is pressed in flange below, spool top, this flange perimeter is connected with bellows one end, the bellows the other end is fixed on the valve casing, the cavity that this bellows below and valve casing constitute, have an opening to lead to atmosphere, bellows top is connected with air intake control valve bellows lower cavity with the cavity of valve casing formation, this cavity also with the outlet plenum UNICOM of main valve.Gas exhausting valve has replaced the constant needle-valve in throttle orifice aperture, and when the main valve downstream pressure was on the low side, gas exhausting valve was closed, so that main valve is opened rapidly greatly, stablizes downstream pressure; When the main valve downstream pressure was higher, gas exhausting valve was opened, and discharged main valve diaphragm top pressure rapidly, and main valve can turn down rapidly, reaches the function of stablizing downstream pressure equally.
Improved pair of pilot valve formula reduction valve can reach downstream pressure and have very high stability.
Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof
Fig. 1 is the schematic representation of a kind of concrete structure of the utility model
Fig. 1 shows main valve 1, main spool spring 2, main valve diaphragm 3, gas exhausting valve 4, main valve outlet plenum 5, valve 4 back cavities 6, outlet 7, nut 8, adjusting screw rod 9, opening 10, gas exhausting valve spring 11, bellows 12, cavity 13, gas exhausting valve valve casing 14, the spool 15 of valve 4, valve 4 ante-chambers 16, air intake control valve valve casing 17, air intake control valve 18, air intake control valve spring 19, bellows 20, the ante-chamber 21 of valve 18, the back cavity 22 of valve 18, main valve snout cavity 23, main valve shell 24.
The utility model is on the basis of air inlet control pilot valve formula reduction valve, set up the pilot valve of exhaust control, make reduction valve be the structure of two pilot valves, the valve opening diameter of gas exhausting valve 4 is 3～8mm, the back cavity 22 of its ante-chamber 16 and valve 18 is communicated with, the back cavity 6 of valve 4 has an open to atmosphere outlet 7, be with adjusting screw rod 9 on the spool 15 of valve 4, screw thread on the screw rod 9 cooperates with the screw of nut 8, nut 8 is fixed on the valve casing 14 of gas exhausting valve 4, gas exhausting valve spring 11 1 ends are pressed on the top flange of transferring screw rod 9, the other end is pressed in flange below, spool 15 top, this flange perimeter is connected with bellows 12 1 ends, and bellows 12 the other ends are fixed on the valve casing 14, the cavity that bellows 12 belows and valve casing 14 constitute, there is an opening 10 to lead to atmosphere, the diameter of bellows 12 is 60～100mm, and the cavity 13 that bellows 12 tops and valve casing 14 constitutes is connected with air intake control valve bellows 20 lower cavity, cavity 13 also with outlet plenum 5 UNICOMs of main valve 1.The function of reduction valve is such, and main valve 1 often closes under spring 2 effects, and when diaphragm 3 tops infeeded air pressure, main valve 1 was opened, and open degree is relevant with atmospheric pressure value.Main valve snout cavity 23 pressure are the air intake control valve 18 that the air-flow of P1 is often opened, above the diaphragm 3 of main valve 1, form pressure P 3, at this moment, the pressure of main valve outlet plenum 5 is P2, the P2 feedback effect is in the bellows 20 of air intake control valve, and with the spring force balance of spring 19, air intake control valve 18 is closed, P3 no longer increases, keep steady flow, when user's air consumption reduces, the pressure P 2 of main valve outlet plenum 5 rises, thereby the pressure of cavity 13 also rises thereupon, compress bellows 12, and overcome the spring force of spring 11, and gas exhausting valve 4 is along with moving down of spool 15 opened, and valve 4 ante-chambers 16 are through valve 4, valve 4 back cavities 6 and outlet 7 are connected with atmosphere, cause diaphragm 3 top pressure to descend, under spring 2 effects, main valve 1 turns down, and guarantees that the pressure P 2 of main valve outlet plenum 5 is stabilized in the predetermined range.When user's air consumption increases, the pressure P 2 of main valve outlet plenum 5 descends, thereby the pressure of cavity 13 also descends thereupon, under the spring force effect of spring 11, gas exhausting valve 4 is closed along with moving on the spool 15, simultaneously, decline along with cavity 13 pressure, the pressure of bellows 20 belows also descends, air intake control valve 18 is opened under the spring force effect of spring 19, and the pressed gas of snout cavity 23 is through runner, the ante-chamber 21 of valve 18, the back cavity 22 of air intake control valve 18 and valve 18, enter the top of main valve diaphragm 3, pressure spring 2, main valve 1 is opened greatly, and the pressure P 2 that guarantees main valve outlet plenum 5 is in predetermined range.The scope that adjusting screw rod 9 and nut 8 are used for regulating steady pressure realizes via opening 10 adjusting of screw rod 9.
Claims (3)
1, one by main valve 1, main spool spring 2, main valve diaphragm 3, main valve shell 24, main valve snout cavity 23, main valve outlet plenum 5, air intake control valve 18, air intake control valve spring 19, air intake control valve bellows 20, the reduction valve that air intake control valve valve casing 17 is formed, it is characterized in that a gas exhausting valve 4, the ante-chamber 16 of valve 4 and the back cavity of air intake control valve 18 22 are communicated with, the back cavity 6 of valve 4 has an open to atmosphere outlet 7, be with adjusting screw rod 9 on the spool 15 of valve 4, screw thread on the screw rod 9 cooperates with the screw of nut 8, nut 8 is fixed on the valve casing 14 of gas exhausting valve, gas exhausting valve spring 11 1 ends are pressed on the top flange of adjusting screw rod 9, the other end is pressed in flange below, spool 15 top, this flange perimeter is connected with bellows 12 1 ends, bellows 12 the other ends are fixed on the valve casing 14, the cavity that bellows 12 belows and valve casing 14 constitute has an opening 10 to lead to atmosphere, the cavity 13 that bellows 12 tops and valve casing 14 constitutes is connected with air intake control valve bellows 20 lower cavity, cavity 13 also with outlet plenum 5 UNICOMs of main valve 1.
2, reduction valve according to claim 1, the valve opening diameter that it is characterized in that gas exhausting valve 4 are 3 to 8mm.
3, reduction valve according to claim 1, the diameter that it is characterized in that bellows 12 are 60 to 100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92215752 CN2130991Y (en) | 1992-06-24 | 1992-06-24 | Double guide type pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92215752 CN2130991Y (en) | 1992-06-24 | 1992-06-24 | Double guide type pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2130991Y true CN2130991Y (en) | 1993-04-28 |
Family
ID=33764159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92215752 Expired - Fee Related CN2130991Y (en) | 1992-06-24 | 1992-06-24 | Double guide type pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2130991Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106090369A (en) * | 2016-08-26 | 2016-11-09 | 天津市国威给排水设备制造有限公司 | A kind of piloted reducer |
| CN106337965A (en) * | 2015-07-06 | 2017-01-18 | 艾默生过程管理调节技术公司 | Fluid Control Apparatus Having Flow Restrictors |
| CN107246498A (en) * | 2017-07-26 | 2017-10-13 | 中国长江电力股份有限公司 | A kind of water system pressure-reducing valve double guide's valve control systems and control method |
| CN108662224A (en) * | 2018-07-19 | 2018-10-16 | 杭州乐守科技有限公司 | A kind of pressure maintaining valve |
| US10317917B2 (en) | 2015-07-06 | 2019-06-11 | Emerson Process Management Regulator Technologies, Inc. | Fluid control apparatus having variable area flow restrictor |
-
1992
- 1992-06-24 CN CN 92215752 patent/CN2130991Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106337965A (en) * | 2015-07-06 | 2017-01-18 | 艾默生过程管理调节技术公司 | Fluid Control Apparatus Having Flow Restrictors |
| US10317917B2 (en) | 2015-07-06 | 2019-06-11 | Emerson Process Management Regulator Technologies, Inc. | Fluid control apparatus having variable area flow restrictor |
| CN106090369A (en) * | 2016-08-26 | 2016-11-09 | 天津市国威给排水设备制造有限公司 | A kind of piloted reducer |
| CN106090369B (en) * | 2016-08-26 | 2019-03-19 | 天津市国威给排水设备制造有限公司 | A kind of piloted reducer |
| CN107246498A (en) * | 2017-07-26 | 2017-10-13 | 中国长江电力股份有限公司 | A kind of water system pressure-reducing valve double guide's valve control systems and control method |
| CN107246498B (en) * | 2017-07-26 | 2023-10-20 | 中国长江电力股份有限公司 | Double pilot valve control system and control method for pressure reducing valve of water supply system |
| CN108662224A (en) * | 2018-07-19 | 2018-10-16 | 杭州乐守科技有限公司 | A kind of pressure maintaining valve |
| CN108662224B (en) * | 2018-07-19 | 2019-09-24 | 台州嘉亨阀门有限公司 | A kind of pressure maintaining valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |