CN104847948A - High-precision automatic control pressure reducer - Google Patents
High-precision automatic control pressure reducer Download PDFInfo
- Publication number
- CN104847948A CN104847948A CN201510229682.8A CN201510229682A CN104847948A CN 104847948 A CN104847948 A CN 104847948A CN 201510229682 A CN201510229682 A CN 201510229682A CN 104847948 A CN104847948 A CN 104847948A
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- CN
- China
- Prior art keywords
- valve core
- decompressor
- pressure
- spring
- high precision
- Prior art date
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
Abstract
The invention discloses a high-precision automatic control pressure reducer. The high-precision automatic control pressure reducer comprises a mechanical structure part, a pressure sensor, and a single-chip microcomputer, wherein the mechanical structure part comprises a pressure reducer shell, an upper valve core, a valve core spacer, a lower valve core, a valve core base, a valve hood, a spring, a spring base and a stepping motor. The outlet pressure of the pressure reducer is in real time acquired by the sensor, according to input commands, acquired pressure data can be treated and analyzed by the single-chip microcomputer through an incremental PID (Proportion Integration Differentiation) algorithm, and the outlet pressure of the pressure reducer is adjusted by adjusting the pretightening force. The high-precision automatic control pressure reducer has the advantages of high outlet pressure adjustment precision and good steadiness. The outlet pressure of the pressure reducer can be in real time adjusted, and thus the high-precision automatic control pressure reducer has a wide application prospect.
Description
Technical field
The invention belongs to gas piping control field, specifically, is a kind of high precision in control decompressor.
Background technique
Decompressor regulates the pressure of decompressor outlet by the aperture of regulating spool, when upstream pressure changes, keeps decompressor outlet pressure to meet usage requirement.
In rocket propulsion field, decompressor is used for by the gas in gas cylinder to require that Output pressure is in tank, and the vibration of decompressor delivery pressure can cause transporting system unstable, affects rocket motor burning, even may by the danger of exploding.
For extruding type solid-liquid rocket transporting system, decompressor controls tank pressure, and because fluid path controls flow by Venturi tube, therefore reducer pressure vibration also can cause oscillation of flows, thus causes force oscillation, causes test failure.
Summary of the invention
In order to solve the problem, the present invention proposes a kind of high precision in control decompressor, comprising: decompressor housing, upper valve core, spool pad, lower valve core, valve core base, valve gap, pushing block, spring, spring seat, stepper motor and diaphragm.
Described decompressor housing is the tubular structure that indoor design has gas channel, and front and rear part is designed with hyperbaric chamber and low-pressure cavity respectively, is all communicated with gas channel; In decompressor housing, gas channel sidewall is designed with ring packing shoulder, sealing shoulder is between hyperbaric chamber and low-pressure cavity simultaneously.Decompressor housing sidewall has decompressor entrance and decompressor exports, be communicated with low-pressure cavity with hyperbaric chamber respectively.
Described valve core base is the airtight tubular structure in one end, and coaxial threaded is fixed in gas channel, and in valve core base sidewall circumference and there is gap between hyperbaric chamber.
Described lower valve core is coaxially arranged in valve core base, coaxially installs with upper valve core, and is provided with annular spool pad between upper valve core and lower valve core; Also need to ensure when valve core structure slides into the limit vertically afterwards, with the sealing shoulder close contact in gas channel in spool pad circumference.
Described valve gap front end and decompressor housing rear end are fixed, and are also provided with diaphragm between valve gap front end and decompressor housing rear end; Valve gap inside is provided with pushing block, spring and spring seat from front to back; Need ensure when pushing block contacts with annular stop platform, upper valve core ear end face Contact in pushing block front end, diaphragm and valve core structure, spool pad circumference be separated with the sealing shoulder in gas channel simultaneously.
Described stepper motor is fixed on valve gap rear end, and the output shaft end of stepper motor contacts with spring seat ear end face.
The advantage of patent of the present invention is:
1, high precision in control decompressor of the present invention, decompressor outlet pressure precision is high, meets highi degree of accuracy usage requirement; Decompressor uses spring as sensing element, by regulating pretightening force to change outlet pressure, for application such as change propulsive, decompressor outlet pressure requires to adjust along with the carrying out of test, allow and test the faster and better requirement reaching input of energy, realize the optimal control of process of the test.
2, high precision in control decompressor of the present invention, there is the advantages such as outlet pressure degree of regulation is high, good stability, can in process of the test, can according to the automatic regulation output pressure of input instruction, the usage requirement of pressure change occasion can be met, have wide practical use in the test of change propulsive solid-liquid rocket.
3, high precision in control decompressor of the present invention, uses sane incremental digital PID control algorithm, ensures that decompressor outlet pressure regulates stable.Single-chip microcomputer adopts incremental digital PID control algorithm to control, compare position model control algorithm, increment type PID algorithm only preserves the error in current time and first three moment, is not easy to produce error accumulation, increment type PID only calculates increment, and error or precision deficiency affect less on control system; During switching, delta algorithm and original value have nothing to do, and are easy to realize manually to switching without impacting automatically.
Accompanying drawing explanation
Fig. 1 is high precision in control pressure reducer overall structural representation of the present invention.
In figure:
1-decompressor housing 2-upper valve core 3-spool pad 4-lower valve core
5-valve core base 6-valve gap 7-pushing block 8-spring
9-spring seat 10-stepper motor 11-diaphragm
Specific embodiments
Below in conjunction with accompanying drawing, the present invention will be further described.
High precision in control decompressor of the present invention, comprises decompressor housing 1, upper valve core 2, spool pad 3, lower valve core 4, valve core base 5, valve gap 6, pushing block 7, spring 8, spring seat 9, stepper motor 10 and diaphragm 11, as shown in Figure 1.
Described decompressor housing 1 adopts high tensile aluminium alloy to make, and for inner coaxial design has the tubular structure of gas channel 101, is used for installing valve core base 5, upper valve core 2 and lower valve core 4; And in decompressor housing 1, front and rear part is designed with high pressure annular chamber 102 and low pressure annular chamber 103 respectively, is all communicated with gas channel 101; In decompressor housing 1, gas channel 101 sidewall is designed with ring packing shoulder 104, sealing shoulder 104 is between high pressure annular chamber 102 and low pressure annular chamber 103 simultaneously.Decompressor housing 1 sidewall has decompressor entrance 105 and export 106 with decompressor, be communicated with low pressure annular chamber 103 with high pressure annular chamber 102 respectively.Decompressor entrance 105 latus rectum 4mm is designed, pressure 0 ~ 23MPa in the present invention; Decompressor exports 106 latus rectum 6mm, pressure 0 ~ 5MPa.
Described valve core base 5 adopts Cuprum alloy to make, for the tubular structure that one end is airtight, coaxial threaded is fixed in gas channel 101, and airtight one end is flushed with decompressor housing 1 front end surface, and in valve core base 5 sidewall circumference and there is gap between high pressure annular chamber 102, being communicated with not between impact to voltage annular chamber 102 with gas channel 101.
Described lower valve core 4 is coaxially arranged in valve core base 5, can slide in valve core base 5; Lower valve core 4 coordinates with end, valve core base 5 rear end by outer wall circumference designing annular stop bead, and what realize that lower valve core 4 slides in valve core base 5 is spacing.Upper valve core 2 and lower valve core 4 are coaxially fixed, and are designed with the annular spool pad 3 that fluoroplastic make between upper valve core 2 and lower valve core 4, fixed by spool pad 3, form integral core structure by upper valve core 2 and lower valve core 4; Also need to ensure simultaneously, when valve core structure slides into the limit vertically afterwards, sealing shoulder 104 close contact of spool pad 3 circumference above and in gas channel 101.
Described valve gap 6 is tubular structure, inner as spring chamber; By Design Orientation shoulder between valve gap 6 front end and decompressor housing 1 rear end, coordinate coaxial positioning, and be also provided with diaphragm between valve gap 6 front end and decompressor housing 1 rear end, by fastening screw trip bolt, valve gap 6, diaphragm 11 are fixed with decompressor housing 1.Pushing block 7, spring 8 and spring seat 9 are installed in spring chamber from front to back; Wherein, pushing block 7 is spacing by the annular stop shoulder that valve gap 6 front inner wall circumference designs; Also realize the location of pushing block 7 rear spring 8 and spring seat 9 simultaneously.Pushing block 7 and central position, spring seat 9 opposite flank are designed with projection, thus, make spring 8 two ends be enclosed within projection, realize the warp-wise location in spring 8 compression process.The present invention's spring abutment 9 of being hit by a bullet adopts 304 stainless steels to make, and 304 stainless steel material corrosion resistances are good, are adapted to multiple gases medium, have easy processing, low cost and other advantages.In said structure, need ensure when pushing block 7 contacts with annular stop platform 8, pushing block 7 front end, diaphragm 11 and upper valve core 2 ear end face Contact in valve core structure, and in valve core structure, spool pad 3 circumference is separated with the sealing shoulder 104 in gas channel 101, there is certain gap (spool aperture).
Described stepper motor 10 is fixed on valve gap 6 rear end, and the output shaft end of stepper motor 10 contacts with spring seat 9 ear end face, and is inserted into the through hole inner position that spring seat 9 ear end face designs.Stepper motor stroke 10mm in the present invention, regulates step number 1000 step, can ensure that the error of delivery pressure is no more than 1%.By said structure, form the diaphragm type structure decompressor containing pressure feedback.
Upper valve core 2 in the present invention, lower valve core 4 center have the endoporus of connection vertically, upper valve core 2 endoporus is communicated with low-pressure cavity, lower valve core 4 endoporus is communicated with valve core base 5 inside, valve core structure upper and lower end face (upper valve core 2 upper-end surface, lower valve core 4 lower end surface) pressure is made to be decompressor low pressure annular chamber 103 pressure, valve core structure is not stressed effect, and then makes spring force and low pressure annular chamber 103 pressure act on the pressure balance of spring seat 9; And due to low pressure annular chamber 103 active area certain, spring force size change very little when valve core structure moves, thus makes low pressure annular chamber 103 pressure stability, the stability of raising decompressor and precision.
High precision in control decompressor of the present invention is controlled by single-chip microcomputer, can obtain highi degree of accuracy, stable Output pressure, reliably carrying out of proof test.After single-chip microcomputer obtains input signal, 106 place's pressure are exported in conjunction with the decompressor being arranged on decompressor and exporting the pressure transducer collection at 106 places, by the pid algorithm of increment, Treatment Analysis is carried out to the pressure data adopted by single-chip microcomputer, obtain control step motor movement after result, and then moved axially by stepper motor output shaft, the pretightening force of Regulation spring, change the pressure of decompressor outlet, the pressure that decompressor is exported meets usage requirement.
When Single-chip Controlling stepper motor 10 output shaft moves forward, spring 8 pretightening force is increased, the whole valve core structure of pushing block 7 driven forward is driven to move forward, now, spool pad 3 circumference is separated with the sealing shoulder 104 in gas channel 101, and spool aperture increases gradually, then the gas flow entering annular low pressure chamber 103 increases, annular low pressure chamber 103 pressure raises, and forms new balance with spring 8 pretightening force; When Single-chip Controlling stepper motor 10 output shaft moves backward, spring 8 pretightening force is reduced, whole valve core structure is moved backward, the sealing shoulder 104 of spool pad 3 circumference above and in gas channel 101 moves closer to, spool aperture reduces gradually, the gas flow then entering annular low pressure chamber 103 reduces, and annular low pressure chamber 103 pressure reduces, and forms new balance with spring 8 pretightening force.
Claims (7)
1. a high precision in control decompressor, is characterized in that: comprise decompressor housing, upper valve core, spool pad, lower valve core, valve core base, valve gap, pushing block, spring, spring seat, stepper motor and diaphragm;
Described decompressor housing is the tubular structure that indoor design has gas channel, and front and rear part is designed with hyperbaric chamber and low-pressure cavity respectively, is all communicated with gas channel; In decompressor housing, gas channel sidewall is designed with ring packing shoulder, sealing shoulder is between hyperbaric chamber and low-pressure cavity simultaneously; Decompressor housing sidewall has decompressor entrance and decompressor exports, be communicated with low-pressure cavity with hyperbaric chamber respectively;
Described valve core base is the airtight tubular structure in one end, and coaxial threaded is fixed in gas channel, and in valve core base sidewall circumference and there is gap between hyperbaric chamber;
Described lower valve core is coaxially arranged in valve core base, coaxially installs with upper valve core, and is provided with annular spool pad between upper valve core and lower valve core; Also need to ensure when valve core structure slides into the limit vertically afterwards, with the sealing shoulder close contact in gas channel in spool pad circumference;
Described valve gap front end and decompressor housing rear end are fixed, and are also provided with diaphragm between valve gap front end and decompressor housing rear end; Valve gap inside is provided with pushing block, spring and spring seat from front to back; Need ensure when pushing block contacts with annular stop platform, upper valve core ear end face Contact in pushing block front end, diaphragm and valve core structure, spool pad circumference be separated with the sealing shoulder in gas channel simultaneously.
Described stepper motor is fixed on valve gap rear end, and the output shaft end of stepper motor contacts with spring seat ear end face.
2. a kind of high precision in control decompressor as claimed in claim 1, is characterized in that: described pushing block and central position, spring seat opposite flank are designed with projection, and both ends of the spring is enclosed within projection.
3. a kind of high precision in control decompressor as claimed in claim 1, is characterized in that: described spring seat adopts 304 stainless steels to make.
4. a kind of high precision in control decompressor as claimed in claim 1, is characterized in that: described stepper motor output shaft end is inserted in through hole that spring seat ear end face designs.
5. a kind of high precision in control decompressor as claimed in claim 1, is characterized in that: described stepper motor stroke 10mm, regulates step number 1000 step, can ensure that the error of delivery pressure is no more than 1%.
6. a kind of high precision in control decompressor as claimed in claim 1, is characterized in that: described upper valve core, lower valve core center have the endoporus of connection vertically, and upper valve core endoporus is communicated with low-pressure cavity, and lower valve core endoporus is communicated with valve core base inside.
7. a kind of high precision in control decompressor as claimed in claim 1, it is characterized in that: also comprise single-chip microcomputer and pressure transducer, after single-chip microcomputer obtains input signal, in conjunction with the decompressor outlet pressure that the pressure transducer being arranged on decompressor outlet port gathers, by the pid algorithm of increment, Treatment Analysis is carried out to the pressure data adopted by single-chip microcomputer, obtain control step motor movement after result, and then moved axially by stepper motor output shaft, the pretightening force of Regulation spring, changes the pressure of decompressor outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510229682.8A CN104847948A (en) | 2015-05-07 | 2015-05-07 | High-precision automatic control pressure reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510229682.8A CN104847948A (en) | 2015-05-07 | 2015-05-07 | High-precision automatic control pressure reducer |
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| Publication Number | Publication Date |
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| CN104847948A true CN104847948A (en) | 2015-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510229682.8A Pending CN104847948A (en) | 2015-05-07 | 2015-05-07 | High-precision automatic control pressure reducer |
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| CN (1) | CN104847948A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105863882A (en) * | 2016-04-27 | 2016-08-17 | 北京航空航天大学 | Flow positioning adjustable direct-current injector for high-concentration hydrogen peroxide variable-thrust hybrid rocket engine |
| CN106837609A (en) * | 2017-04-07 | 2017-06-13 | 北京航空航天大学 | A kind of change propulsive solid-liquid rocket two-way centrifugal injector structure |
| CN107193295A (en) * | 2016-03-15 | 2017-09-22 | 马达斯有限责任公司 | For controlling and adjusting control and the adjusting means that gas passes through |
| CN110243530A (en) * | 2019-07-23 | 2019-09-17 | 浙江耀达智能科技股份有限公司 | A kind of novel pressure sensor |
| CN112144085A (en) * | 2020-10-20 | 2020-12-29 | 山东中安电力科技有限公司 | Mechanical electric brush silver plating method and device based on multi-parameter control |
| CN114791050A (en) * | 2022-04-21 | 2022-07-26 | 欧世盛（北京）科技有限公司 | Automatic back pressure valve and fluid metering and adding system |
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|---|---|---|---|---|
| US3856042A (en) * | 1973-06-21 | 1974-12-24 | Nasa | Combined pressure regulator and shutoff valve |
| EP0830536B1 (en) * | 1995-12-22 | 2001-10-31 | Robert Bosch Gmbh | Pressure regulating valve |
| CN2665484Y (en) * | 2003-11-19 | 2004-12-22 | 马俊燕 | Branch pipe pressure-reducing valve |
| CN102392911A (en) * | 2011-11-15 | 2012-03-28 | 浙江迎日阀门制造有限公司 | Diaphragm type pressure reducing valve |
| CN102996873A (en) * | 2011-09-08 | 2013-03-27 | 北京航天动力研究所 | Driving type decompression valve capable of automatically adjusting high-accuracy stepping motor |
| CN103925399A (en) * | 2014-05-07 | 2014-07-16 | 西安交通大学 | Diaphragm-type pneumatic proportional pressure reducing valve of edge cam driven by servo motor directly |
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2015
- 2015-05-07 CN CN201510229682.8A patent/CN104847948A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3856042A (en) * | 1973-06-21 | 1974-12-24 | Nasa | Combined pressure regulator and shutoff valve |
| EP0830536B1 (en) * | 1995-12-22 | 2001-10-31 | Robert Bosch Gmbh | Pressure regulating valve |
| CN2665484Y (en) * | 2003-11-19 | 2004-12-22 | 马俊燕 | Branch pipe pressure-reducing valve |
| CN102996873A (en) * | 2011-09-08 | 2013-03-27 | 北京航天动力研究所 | Driving type decompression valve capable of automatically adjusting high-accuracy stepping motor |
| CN102392911A (en) * | 2011-11-15 | 2012-03-28 | 浙江迎日阀门制造有限公司 | Diaphragm type pressure reducing valve |
| CN103925399A (en) * | 2014-05-07 | 2014-07-16 | 西安交通大学 | Diaphragm-type pneumatic proportional pressure reducing valve of edge cam driven by servo motor directly |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107193295A (en) * | 2016-03-15 | 2017-09-22 | 马达斯有限责任公司 | For controlling and adjusting control and the adjusting means that gas passes through |
| CN107193295B (en) * | 2016-03-15 | 2022-04-19 | 马达斯有限责任公司 | Control and regulating device for controlling and regulating the passage of a gas |
| CN105863882A (en) * | 2016-04-27 | 2016-08-17 | 北京航空航天大学 | Flow positioning adjustable direct-current injector for high-concentration hydrogen peroxide variable-thrust hybrid rocket engine |
| CN106837609A (en) * | 2017-04-07 | 2017-06-13 | 北京航空航天大学 | A kind of change propulsive solid-liquid rocket two-way centrifugal injector structure |
| CN106837609B (en) * | 2017-04-07 | 2018-03-09 | 北京航空航天大学 | A kind of change propulsive solid-liquid rocket two-way centrifugal injector structure |
| CN110243530A (en) * | 2019-07-23 | 2019-09-17 | 浙江耀达智能科技股份有限公司 | A kind of novel pressure sensor |
| CN112144085A (en) * | 2020-10-20 | 2020-12-29 | 山东中安电力科技有限公司 | Mechanical electric brush silver plating method and device based on multi-parameter control |
| CN112144085B (en) * | 2020-10-20 | 2022-05-06 | 山东中安电力科技有限公司 | Mechanical electric brush silver plating method and device based on multi-parameter control |
| CN114791050A (en) * | 2022-04-21 | 2022-07-26 | 欧世盛（北京）科技有限公司 | Automatic back pressure valve and fluid metering and adding system |
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| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
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Application publication date: 20150819 |