CN104375521A - Pressure sensing liquid level height control device - Google Patents
Pressure sensing liquid level height control device Download PDFInfo
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- CN104375521A CN104375521A CN201310348870.3A CN201310348870A CN104375521A CN 104375521 A CN104375521 A CN 104375521A CN 201310348870 A CN201310348870 A CN 201310348870A CN 104375521 A CN104375521 A CN 104375521A
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Abstract
The invention discloses a pressure sensing liquid level height control device. A vacuum insulated panel comprises a pair of hydraulic sensors, a data processing and calculating circuit, a data logic analysis circuit, an alarm feedback circuit, pulp control valves and a pulp storage trough. The pair of hydraulic sensors measures hydraulic pressure in the pulp storage trough in straight line height. The measured values of the fluid pressure at different heights are integrated through the data processing and calculating circuit, and the real-time liquid level is obtained through calculation. A feed valve and a pulp discharging valve are controlled to be opened and closed through a logic analysis circuit and an alarm feedback circuit, and the height of the pulp is judged and adjusted in time.
Description
Technical field
The invention belongs to liquid or slurry liquid surface height controlling technical field, specifically relate to a kind of vacuum heat-insulating plate with slurry time pond with slurry liquid level control device.
Background technology
Vacuum heat-insulating plate is core material with glass fibre, take barrier composite films as packaging bag, the state-of-the-art thermal insulation material in the world be at present prepared from after Vacuum Package, need carry out process with slurry storing in stock tank before its core material is shaping.And in process with slurry, fully mix for making slurry, adjuvant spreads completely, neither cause when stirring and splash and waste slurry and do not affect production efficiency, slurry liquid level must control through row is strict.
Current level gauging has a variety of method, as the direct method of measurement, buoy mensuration, ultrasonic reflections mensuration, capacity water level measuring method, infrared reflection mensuration.
Direct method of measurement application is loaded down with trivial details, and expend time in energy, and error is large, and is difficult to realize the higher liquid level test of water level.
Buoy mensuration method is subject to buoyancy of water effect according to the float (also becoming buoy) swum on liquid level to produce displacement with the change of water level and carry out level gauging, install complicated, measuring accuracy is low, unreliable, often occur that stuck motionless the blocking with sensor of float causes indeterminacy; Maintenance workload is large, and install, debug inconvenience, what collect is only simulation alarm signal, can not directly enter power plant's computer supervisory control system.
Ultrasonic reflections mensuration and infrared reflection mensuration are by sound wave and electromagnetic reflection process, the time of transmitting and receiving process or last gained signal intensity are measured, although measuring error is little, cost is relatively high, is used in general industry production and rather wastes one's talent on a petty job.
Capacity water level measuring method is by the change rule of intermediate medium specific inductive capacity and the method for computation and measurement liquid level, be quick on the draw although have, advantages of simple structure and simple, but due to the uncertain factor such as uncertainty of tested paste composition, specific inductive capacity can be caused unstable and cause comparatively big error, wayward.
Shanghai University Of Engineering Science discloses a kind of water level supervisory system in the patent of invention of publication number 102809407A.This system utilizes the combination of infrared sensor detection technique and single-chip microcomputer operation technique, and achieve the monitoring of water level real-time radio, measurement result is reliable and stable.
Consider the problems such as technical costs at present, often adopt buoy mensuration to carry out the height monitoring of liquid level in commercial production, but its shortcoming still not yet overcomes.Buoy is thrown in containing slurry store in stock tank, utilize buoyancy rule, float produces displacement with the change of water level, water level rise time ball float to floating; During water level decreasing, ball float is to floating downward, and principle is simple, but result degree of accuracy slightly inaccuracy.
Fluid pressure is relevant to the vertical range of liquid level with it, if utilize this rule, is processed data, just can realize the elevation carrection to water level and control technology, and principle is simple, easy to use, and is existingly enough to realize this Survey control method with science and technology.
Summary of the invention
Object of the present invention is intended to overcome the deficiencies in the prior art, provides a kind of and measures accurately, principle is simple, the pressure sensitive liquid level control height device of auto-control.
The technical scheme adopted for realizing object of the present invention is: provide a kind of pressure sensitive liquid level control height device, it is characterized in that comprising: hydraulic pressure transducer is to (11), data processing counting circuit (12), mathematical logic analysis circuit (13), warning feedback circuit (14), control slurry valve (15) and store stock tank body (16).By measuring differing heights hydraulic pressure, calculating through process, realizing level gauging and control action.
Described pressure transducer is made up of two hydraulic pressure transducers (11), and one is placed in and stores at the bottom of stock tank, and another is placed on 0.5 ~ 1.5m place pool wall at the bottom of distance pond.
Described data processing counting circuit (12) receives two sensors measurement data, according to the proportional relation of hydraulic pressure in Archimedes' principle with height, utilization is designed program integral data, carry out computing by fixed routine, utilize the product of hydraulic pressure at the bottom of pond and difference in height to calculate liquid level divided by height pressure difference and obtain calculating liquid level.
Described mathematical logic analysis circuit (13) accepts counting circuit integral data, utilize logic analyzer, relatively obtain data and setting data, if input data are large compared with setting value, then send electric signal to warning feedback circuit (14), warning feedback circuit is made to report to the police and send command adapted thereto, if input data are less, then not to next stage output electric signal.
Described liquid level control height device, the setting data in this circuit structure is the height value of distance pond body tip height 0.2 ~ 0.8m, and the page namely specified institute allows the maximum height that reaches, once liquid level exceedes this highly, just needs to make timely adjustment to it.
Described warning feedback circuit (14) accepts logic analysis liquid level and gives the alarm, and instruction is opened control slurry valve (15) and closed material inlet valve.
Described control slurry valve (15) is positioned at pool wall liquid level and allows maximum height position, and connects another slurry reservoir by pipeline, both effectively have adjusted liquid level in time, also can not cause slurry wasting phenomenon simultaneously.
Water-proof coating is covered in described storing in stock tank body (16), and water-holding capacity is good.
Effect: the present invention compared with prior art, has the following advantages:
(1) the high device of this control adopts pressure transducer, by measuring differing heights hydraulic pressure, utilizes hydraulic pressure with height change rule, and calculate liquid level, accuracy is higher;
(2) utilize simple mechanism to measure, principle is simple, and cost is lower;
(3) the high apparatus structure of this control is less, is convenient to install and use;
(4) effectively control liquid level, realize on-line automaticization and produce.
Accompanying drawing explanation
Fig. 1 is the simple and easy workflow diagram of a kind of pressure sensitive liquid level control height device of the present invention;
Fig. 2 is the easy structure figure of a kind of pressure sensitive liquid level control height device of the present invention.
Embodiment
Below in conjunction with specific embodiment, illustrate the present invention further, these embodiments should be understood only be not used in for illustration of the present invention and limit the scope of the invention, after having read the present invention, the amendment of those skilled in the art to the various equivalent form of value of the present invention has all fallen within the application's claims and limited.
Embodiment
With reference to Fig. 2, a kind of pressure sensitive liquid level control height device described in the present embodiment comprises: comprise hydraulic pressure transducer to (11), data processing counting circuit (12), mathematical logic analysis circuit (13), warning feedback circuit (14), control slurry valve (15) and store stock tank body (16).
When this liquid level control height device is installed, concrete technology requires as follows:
(1) be placed in (11) one by pressure transducer and store at the bottom of stock tank, another is placed on 1.0m place pool wall at the bottom of distance pond;
(2) data processing counting circuit (12) is utilized to receive two sensors measurement data, utilization is designed program integral data, obtains calculating liquid level, if storing stock tank base pressure is P, another force value is P ', then its liquid level is [P/ (P-P ')] m;
(3) counting circuit integral data is accepted by mathematical logic analysis circuit (13), utilize logic analyzer, relatively obtain data and setting data, if input data are large compared with setting value, then send electric signal to warning feedback circuit (14), warning feedback circuit is made to report to the police and send command adapted thereto, if input data are less, then not to next stage output electric signal;
(4) setting data in foregoing circuit structure is set as at the height value of distance pond body tip height 0.3m;
(5) accept logic analysis liquid level by warning feedback circuit (14) to give the alarm, and instruction is opened control slurry valve (15) and is closed material inlet valve;
(6) offer control slurry valve (15) and allow maximum height position in pool wall liquid level, and connect another slurry reservoir by pipeline:
(7) store in stock tank body (16) and cover water-proof coating, cement pit body water-holding capacity is improved.
The above embodiment, it is only preferred embodiment of the present invention, be not restriction the present invention being made to other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the Equivalent embodiments of equivalent variations.In every case be the content not departing from technical solution of the present invention, any type of simple modification, equivalent variations and the remodeling done above embodiment according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.
Claims (7)
1. a pressure sensitive liquid level control height device, is characterized in that comprising hydraulic pressure transducer to (11), data processing counting circuit (12), mathematical logic analysis circuit (13), warning feedback circuit (14), control slurry valve (15) and store stock tank body (16).
2. liquid level control height device according to claim 1, is characterized in that described pressure transducer is made up of two hydraulic pressure transducers (11), is placed in respectively and stores at the bottom of stock tank and 0.5 ~ 1.5m place at the bottom of distance pond.
3. liquid level control height device according to claim 1, it is characterized in that described data processing counting circuit (12) receives two sensors measurement data, utilization is designed program integral data, calculates liquid level by the product of hydraulic pressure at the bottom of pond and difference in height divided by height pressure difference.
4. liquid level control height device according to claim 1, is characterized in that described mathematical logic analysis circuit (13) accepts counting circuit integral data, if input data are comparatively large, then feedback circuit (14) of reporting to the police sends electric signal.
5. liquid level control height device mathematical logic analysis circuit according to claim 4, it is characterized in that setting data in this circuit structure for distance pond body tip height be 0.2 ~ 0.8m.
6. liquid level control height device according to claim 1, is characterized in that described warning feedback circuit (14) accepts logic analysis liquid level and gives the alarm, and instruction is opened control slurry valve (15) and closed material inlet valve.
7. liquid level control height device according to claim 1, is characterized in that described control slurry valve (15) is positioned at pool wall liquid level and allows maximum height position, and connects another slurry reservoir by pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310348870.3A CN104375521A (en) | 2013-08-12 | 2013-08-12 | Pressure sensing liquid level height control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310348870.3A CN104375521A (en) | 2013-08-12 | 2013-08-12 | Pressure sensing liquid level height control device |
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| CN104375521A true CN104375521A (en) | 2015-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310348870.3A Pending CN104375521A (en) | 2013-08-12 | 2013-08-12 | Pressure sensing liquid level height control device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105097619A (en) * | 2015-09-01 | 2015-11-25 | 武汉华星光电技术有限公司 | Wet etching device |
| CN111604158A (en) * | 2020-05-14 | 2020-09-01 | 东莞市唯美陶瓷工业园有限公司 | Method and system for automatically feeding ceramic slurry and storage medium |
| CN114263847A (en) * | 2021-12-24 | 2022-04-01 | 北京半导体专用设备研究所（中国电子科技集团公司第四十五研究所） | Liquid nitrogen supply control device |
-
2013
- 2013-08-12 CN CN201310348870.3A patent/CN104375521A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105097619A (en) * | 2015-09-01 | 2015-11-25 | 武汉华星光电技术有限公司 | Wet etching device |
| CN105097619B (en) * | 2015-09-01 | 2018-01-26 | 武汉华星光电技术有限公司 | A kind of wet etching device |
| CN111604158A (en) * | 2020-05-14 | 2020-09-01 | 东莞市唯美陶瓷工业园有限公司 | Method and system for automatically feeding ceramic slurry and storage medium |
| CN111604158B (en) * | 2020-05-14 | 2021-09-21 | 东莞市唯美陶瓷工业园有限公司 | Method and system for automatically feeding ceramic slurry and storage medium |
| CN114263847A (en) * | 2021-12-24 | 2022-04-01 | 北京半导体专用设备研究所（中国电子科技集团公司第四十五研究所） | Liquid nitrogen supply control device |
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Application publication date: 20150225 |
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