CN102297756A - Method for automatically regulating vacuum of hydraulic depression tank and device thereof - Google Patents
Method for automatically regulating vacuum of hydraulic depression tank and device thereof Download PDFInfo
- Publication number
- CN102297756A CN102297756A CN2011102142395A CN201110214239A CN102297756A CN 102297756 A CN102297756 A CN 102297756A CN 2011102142395 A CN2011102142395 A CN 2011102142395A CN 201110214239 A CN201110214239 A CN 201110214239A CN 102297756 A CN102297756 A CN 102297756A
- Authority
- CN
- China
- Prior art keywords
- vacuum
- water tank
- decompression cabinet
- air collector
- tank
- 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.)
- Granted
Links
Images
Landscapes
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention relates to a device for automatically regulating vacuum, in particular to the device for automatically regulating the vacuum of a hydraulic depression tank, which comprises an upstream water tank, a downstream water tank and a depression tank, wherein the upstream water tank is communicated with the downstream water tank; and a connecting pipeline for the upstream water tank and the downstream water tank is provided with an electric butterfly valve. The device for automatically regulating the vacuum of the hydraulic depression tank also comprises a vacuum pump and an air collector, wherein the air collector is connected with the vacuum pump; the outlet of the air collector is divided into three outputs which are respectively connected to the upstream water tank, the downstream water tank and the depression tank; a connecting pipeline for the air collector and the upstream water tank, a connecting pipeline for the air collector and the downstream water tank and a connecting pipeline for the air collector and the depression tank are respectively provided with an electric butterfly valve; and the vacuum pipeline of the depression tank is provided with an absolute pressure vacuum sensor. The device for automatically regulating the vacuum of the hydraulic depression tank is capable of greatly improving the stability and the control precision of the vacuum control of the depression tank, utilizing a monitoring system of the hydraulic depression tank to achieve the control function of a computer and reducing the working strength when the original manual vacuum regulation is carried out.
Description
Technical field
The present invention relates to a kind of vacuum tightness Automatic adjustment method and device, a kind of specifically water conservancy project decompression cabinet vacuum tightness Automatic adjustment method and device.
Background technology
The requirement of testing and studying along with the water conservancy project decompression cabinet constantly promotes, in the water conservancy project decompression cabinet process of the test vacuum tightness environment requirement is improved constantly thereupon, all be to rely on to adopt the vacuum pump extracting vacuum in the past, and manually used the air release manual adjustments to reach the vacuum tightness desired value of testing requirements.But along with process of the test, vacuum values constantly reduces, and needs artificially observation, and manually boots vacuum pump and vacuumize once more, and so forth.How to realize the focus that dynamic, accurate vacuum conditions all is research and design all the time in the process of the test.In water conservancy project decompression cabinet pilot system, vacuum degree control is a difficult problem always, vacuum degree control stable and accurately directly have influence on model experiment results, thus may have influence on the work safety of actual original shape.
Along with the development of control technology, the process of the test of water conservancy project decompression cabinet has progressively adopted computing machine or PLC control system, and the water level in the process of the test, flow etc. have all been realized the computer controlled automatic function.But how to realize the automatic adjusting of vacuum tightness, be the problem that design and scientific research and testing personnel pay special attention to always.
Summary of the invention
Technical matters to be solved by this invention is: have shortcoming at above prior art, propose a kind of water conservancy project decompression cabinet vacuum tightness Automatic adjustment method and device, can effectively realize the dynamic adjustments of the vacuum tightness environment in the decompression cabinet process of the test.
The technical scheme that the present invention solves above technical matters is:
Water conservancy project decompression cabinet vacuum tightness Automatic adjustment method, carry out according to the following steps:
⑴ install frequency converter additional on vaccum pump motor, on decompression cabinet, be installed into the moving variable valve of pneumoelectric, absolute pressure formula vacuum sensor and vacuum breaker are installed on the decompression cabinet vacuum line, and absolute pressure formula vacuum sensor links to each other with a PID controller, and the PID controller connects vacuum breaker;
⑵ be evacuated to decompression cabinet near the target vacuum degree value by starting vacuum pump, and the converting operation by frequency converter, and decompression cabinet vacuum tightness is carried out coarse adjustment;
⑶ gather the vacuum tightness instantaneous value on the decompression cabinet vacuum line, import the PID controller with decompression cabinet target vacuum degree value and carry out the difference that PID calculates target vacuum degree value and actual detected vacuum tightness, closed-loop control by the PID controller, finish 0～10V analog quantity control signal of vacuum breaker givenly, realize the stable control of decompression cabinet vacuum tightness.
Water conservancy project decompression cabinet vacuum tightness self-checking device, comprise upstream water tank, downstream water tank and decompression cabinet, the upstream water tank is communicated with the downstream water tank, the connecting tube of upstream water tank and downstream water tank is provided with electric butterfly valve and also comprises vacuum pump, air collector and PID controller, air collector and described vacuum pump, the outlet of air collector is divided into three tunnel outputs, be connected to upstream water tank, downstream water tank and decompression cabinet respectively, all be provided with electric butterfly valve on the connecting tube of air collector and upstream water tank, downstream water tank and decompression cabinet, electric butterfly valve links to each other with the PID controller; Absolute pressure formula vacuum sensor is installed on the vacuum line of decompression cabinet, and absolute pressure formula vacuum sensor links to each other with the PID controller; All be installed into the moving variable valve of pneumoelectric on upstream water tank, downstream water tank, decompression cabinet and the air collector; Vacuum pump is the frequency conversion vacuum pump.
The technical scheme that the present invention further limits is:
Aforesaid water conservancy project decompression cabinet vacuum tightness Automatic adjustment method, the control of vacuum pump frequency converter is controlled by PLC fieldbus mode, avoids the interference of power-equipment to signal.
Advantage of the present invention is: vaccum pump motor has installed frequency converter additional, realizes dynamically vacuumizing function, is convenient to realize the coarse adjustment in vacuum desired value zone; Pipeline vacuum tightness detecting sensor is regulated the detected value of PID closed loop as vacuum tightness; The vacuum tightness variable valve of automatically controlled control through the given 0～10V control signal of analog quantity channel after the PID adjusting computing, is realized the accurate adjustment function of vacuum tightness.The present invention can improve the stability and the control accuracy of decompression cabinet vacuum degree control greatly; Can realize the automatic control function of computing machine; Working strength in the time of can reducing former artificial vacuum tightness and regulate.
Description of drawings
Fig. 1 is a connection diagram of the present invention.
Embodiment
Present embodiment is a kind of water conservancy project decompression cabinet vacuum tightness Automatic adjustment method, carries out according to the following steps:
⑴ install frequency converter additional on vaccum pump motor, on decompression cabinet, be installed into the moving variable valve of pneumoelectric, absolute pressure formula vacuum sensor and vacuum breaker are installed on the decompression cabinet vacuum line, absolute pressure formula vacuum sensor links to each other with a PID controller, the PID controller connects vacuum breaker, the control of vacuum pump frequency converter is controlled by PLC fieldbus mode, avoids the interference of power-equipment to signal;
⑵ be evacuated to decompression cabinet near the target vacuum degree value by starting vacuum pump, and the converting operation by frequency converter, and decompression cabinet vacuum tightness is carried out coarse adjustment;
⑶ gather the vacuum tightness instantaneous value on the decompression cabinet vacuum line, import the PID controller with decompression cabinet target vacuum degree value and carry out the difference that PID calculates target vacuum degree value and actual detected vacuum tightness, closed-loop control by the PID controller, finish 0～10V analog quantity control signal of vacuum breaker givenly, realize the stable control of decompression cabinet vacuum tightness.
Water conservancy project decompression cabinet vacuum tightness self-checking device connects as shown in Figure 1, comprises upstream water tank 1, downstream water tank 2 and decompression cabinet 3, and upstream water tank 1 is communicated with downstream water tank 2, and upstream water tank 1 is provided with electric butterfly valve F4 with the connecting tube of downstream water tank 2; Also comprise vacuum pump group 4, air collector 5 and PID controller, vacuum pump group 4 is frequency conversion vacuum pump group.Air collector 5 is connected with vacuum pump group 4, the outlet of air collector 5 is divided into three tunnel outputs, be connected to upstream water tank 1, downstream water tank 2 and decompression cabinet 3 respectively, air collector 5 is provided with electric butterfly valve F1 with the connecting tube of upstream water tank 1, air collector 5 is provided with electric butterfly valve F2 with the connecting tube of downstream water tank 2, air collector 5 is provided with electric butterfly valve F3 with the connecting tube of decompression cabinet 32, and electric butterfly valve links to each other with the PID controller; Absolute pressure formula vacuum sensor is installed on the vacuum line of decompression cabinet 3, and absolute pressure formula vacuum sensor links to each other with the PID controller; Electric control valve F5 is installed on the upstream water tank 1, electric control valve F6 is installed on the downstream water tank 2, electric control valve F7 is installed on the decompression cabinet 3, electric control valve F8 is installed on the air collector 5.
Vaccum pump motor has installed frequency converter additional, realizes dynamically vacuumizing function, is convenient to realize the coarse adjustment in vacuum desired value zone; Pipeline vacuum tightness detecting sensor is regulated the detected value of PID closed loop as vacuum tightness; The vacuum tightness variable valve of automatically controlled control through the given 0～10V control signal of analog quantity channel after the PID adjusting computing, is realized the accurate adjustment function of vacuum tightness.Test is evacuated to absolute pressure 99% by the frequency conversion vacuum pump, and according to target value set 98.5%, it is given to start variable valve, realizes that 98.5% vacuum tightness is stablized control function for a long time.
The present invention can also have other embodiment, and the technical scheme that equal replacement of all employings or equivalent transformation form all drops within the scope of protection of present invention.
Claims (3)
1. water conservancy project decompression cabinet vacuum tightness Automatic adjustment method is characterized in that: carry out according to the following steps:
⑴ install frequency converter additional on vaccum pump motor, on decompression cabinet, be installed into the moving variable valve of pneumoelectric, absolute pressure formula vacuum sensor and vacuum breaker are installed on the decompression cabinet vacuum line, absolute pressure formula vacuum sensor links to each other with a PID controller, and described PID controller connects described vacuum breaker;
⑵ be evacuated to decompression cabinet near the target vacuum degree value by starting vacuum pump, and the converting operation by frequency converter, and decompression cabinet vacuum tightness is carried out coarse adjustment;
⑶ gather the vacuum tightness instantaneous value on the decompression cabinet vacuum line, import the PID controller with decompression cabinet target vacuum degree value and carry out the difference that PID calculates target vacuum degree value and actual detected vacuum tightness, closed-loop control by the PID controller, finish 0～10V analog quantity control signal of vacuum breaker givenly, realize the stable control of decompression cabinet vacuum tightness.
2. water conservancy project decompression cabinet vacuum tightness Automatic adjustment method as claimed in claim 1, it is characterized in that: the control of described vacuum pump frequency converter is controlled by PLC fieldbus mode, avoids the interference of power-equipment to signal.
3. the device that is used for claim 1 or 2 described water conservancy project decompression cabinet vacuum tightness Automatic adjustment method, comprise upstream water tank, downstream water tank and decompression cabinet, described upstream water tank is communicated with the downstream water tank, and the connecting tube of described upstream water tank and downstream water tank is provided with electric butterfly valve; It is characterized in that: also comprise vacuum pump, air collector and PID controller, described air collector is connected with described vacuum pump, the outlet of described air collector is divided into three tunnel outputs, be connected to upstream water tank, downstream water tank and decompression cabinet respectively, all be provided with electric butterfly valve on the connecting tube of described air collector and upstream water tank, downstream water tank and decompression cabinet, described electric butterfly valve links to each other with described PID controller; Absolute pressure formula vacuum sensor is installed on the vacuum line of described decompression cabinet, and described absolute pressure formula vacuum sensor links to each other with described PID controller; All be installed into the moving variable valve of pneumoelectric on described upstream water tank, downstream water tank, decompression cabinet and the air collector; Described vacuum pump is the frequency conversion vacuum pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110214239 CN102297756B (en) | 2011-07-28 | 2011-07-28 | Method for automatically regulating vacuum of hydraulic depression tank and device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110214239 CN102297756B (en) | 2011-07-28 | 2011-07-28 | Method for automatically regulating vacuum of hydraulic depression tank and device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102297756A true CN102297756A (en) | 2011-12-28 |
| CN102297756B CN102297756B (en) | 2013-02-27 |
Family
ID=45358326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110214239 Active CN102297756B (en) | 2011-07-28 | 2011-07-28 | Method for automatically regulating vacuum of hydraulic depression tank and device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102297756B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111473964A (en) * | 2020-04-22 | 2020-07-31 | 中国科学院西安光学精密机械研究所 | Rapid decompression test device and method for large-size aircraft component |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050079074A1 (en) * | 2003-10-10 | 2005-04-14 | Erc, Inc. | Vacuum control system |
| CN101751056A (en) * | 2008-12-10 | 2010-06-23 | 中国科学院沈阳科学仪器研制中心有限公司 | Vacuum system constant voltage constant current regulator and control method thereof |
-
2011
- 2011-07-28 CN CN 201110214239 patent/CN102297756B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050079074A1 (en) * | 2003-10-10 | 2005-04-14 | Erc, Inc. | Vacuum control system |
| CN101751056A (en) * | 2008-12-10 | 2010-06-23 | 中国科学院沈阳科学仪器研制中心有限公司 | Vacuum system constant voltage constant current regulator and control method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 刘继广,1: "水工减压模型试验理论的探讨", 《水利水电技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111473964A (en) * | 2020-04-22 | 2020-07-31 | 中国科学院西安光学精密机械研究所 | Rapid decompression test device and method for large-size aircraft component |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102297756B (en) | 2013-02-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1903698B (en) | Multipoint synchronous lifting device and its lifting method | |
| CN104089762B (en) | Flow characteristic test method of turbine governing valve | |
| CN108343542B (en) | Speed regulator sectional closing control device and method based on proportional throttle valve | |
| CN203053656U (en) | Water nozzle hydraulic-pressure and air-pressure sealing detector | |
| CN104563219A (en) | Water supply control method without external sensor | |
| CN103868670A (en) | Mach number control method of experimental section flow field of continuous transonic wind tunnel | |
| CN204115829U (en) | A kind of combine detection system | |
| CN103995544A (en) | Control device and method for unsteady flow pumping test flow constancy | |
| CN201461354U (en) | Variable frequency regulation closed-loop control system of water pump | |
| CN102297756B (en) | Method for automatically regulating vacuum of hydraulic depression tank and device thereof | |
| CN101705958A (en) | Double-cylinder synchronous control system | |
| CN202689105U (en) | Tap water booster pump station pipe network excess pressure water storage control device | |
| CN102748957A (en) | Yellow phosphorus electric stove tail gas recovery system | |
| CN203960938U (en) | A kind of excavator plateau self-adapting power controller | |
| CN202166907U (en) | Automatic water level, flow adjusting device for plumber depression tank test | |
| CN202141580U (en) | Automatic regulating device for hydraulic depression tank vacuum degree | |
| CN104317322B (en) | A kind of automatic pressure-regulating type high-pressure helium control system | |
| CN204003790U (en) | Centrifugal governor test stand | |
| CN102817394B (en) | Hydraulic pump control system of excavator, method and excavator | |
| CN102776921B (en) | Control method for overbottom pressure and water storage of pipe network of tap water pressurizing pump station | |
| CN204025238U (en) | A kind of high-voltage electrical apparatus ratio pressure regulating system | |
| CN102354236A (en) | Automatic adjusting device of test water level and flow of hydraulic depression tank and control method thereof | |
| CN201325863Y (en) | Fluid metering supply device | |
| CN102288384A (en) | Large-scale unsteady flow decompression box | |
| CN203773373U (en) | Low-pressure cabin measurement and control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |