CN101813506B - Device for improving installation efficiency of external liquid level meter and application method thereof - Google Patents
Device for improving installation efficiency of external liquid level meter and application method thereof Download PDFInfo
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- CN101813506B CN101813506B CN2010101545407A CN201010154540A CN101813506B CN 101813506 B CN101813506 B CN 101813506B CN 2010101545407 A CN2010101545407 A CN 2010101545407A CN 201010154540 A CN201010154540 A CN 201010154540A CN 101813506 B CN101813506 B CN 101813506B
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Abstract
The invention discloses a device for improving the installation efficiency of an external liquid level meter and an application method thereof. The method comprises the following steps: (1) arranging a mounting plane on the outer side of the bottom wall of a container on which a measuring head is arranged; (2) fixing a measuring head mounting seat on the mounting plane; (3) arranging the measuring head on the measuring head mounting seat on the mounting plane and closely matching the measuring end face of the measuring head with the mounting plane; (4) arranging a self-cleaning device on the inner side of the bottom wall of the container corresponding to the mounting plane and making the self-cleaning device vertical to the inner side of the bottom wall of the container; and (5) arranging a waveguide and keeping the central line of the waveguide concentric with the central line of the measuring head. The device has the advantages of improving vibration signal transmission efficiency between the measuring head and the bottom wall of the container, shorting installation time and improving installation efficiency, automatically cleaning the inner side of the bottom wall of the container opposite to the measuring head and preventing the deposition of deposit from affecting signal transmission and preventing liquid level from fluctuating severely when liquid flows inwards by using the waveguide.
Description
Technical field
The invention belongs to the industrial automation instrument field, relate to a kind of application of external liquid level meter, especially a kind of external liquid level meter measuring head installation quality, efficient and the device in serviceable life and application process thereof of improving.
Background technology
Whether depend primarily on the vibration signal that measuring head receives in the installation quality of external liquid level meter measuring head, efficient and serviceable life enough strong.The principal element that influences measuring head received signal power is: the liquid container wall that, installs and measures head place is curved surface often, the diapire of spherical tank, horizontal tank and sausage shaped vertical tank for example, and the sidewall of cylindrical vertical tank and turriform container etc. all is a curved surface.But the operative end surface of measuring head is the plane.So after measuring head was installed on the chamber wall, the actual contact face of measuring head and container was a point at measuring head center just often, contact area is very little.The signal that passes surface of contact is just very faint.Got rid of air though added couplant between measuring head and chamber wall, the loss when vibration signal passes this coupling surface is still very big, and the vibration signal that makes measuring head receive has been weakened greatly.Two, if a large amount of feed liquor, fluids will cause liquid to flow rapidly in container rapidly.This makes vibration signal be lost because the direction of propagation changes in liquid.If the pressure in the container changes rapidly significantly, will cause liquid to vaporize rapidly, seethe with excitement, gas liquefies rapidly, makes liquid fluctuating very big, when serious even the complete liquid level of neither one.This has caused vibration wave signal from liquid surface reflection to all directions scattering, and the signal that makes measuring head receive is very faint, sometimes even lost signal.In order to address this problem, a waveguide pipe or anti-wave tube to be installed in container usually to be stablized liquid level and reduce liquid flow and liquid fluctuating in the waveguide pipe, and prevent signal dispersion.External liquid level meter is measured the liquid level in the waveguide pipe.But in the installation process, internal tank has been installed waveguide pipe, and finish coatings outside behind the container closure will install heat-insulation layer additional sometimes, so just is difficult in the accurate installation site of finding waveguide pipe from the container outside.Make measuring head be difficult to accurately aim at the center installation of waveguide pipe lower port, thereby seriously weakened the signal that measuring head receives.Three, the container inner bottom part time has been grown and can deposit thicker sediment, takes the sediment of 3 years to the 5 years internal tanks of cleaning that just stop production usually.Sedimentary deposit can weaken the signal that measuring head receives greatly before cleaning, feasible normally measuring liquid level.Above-mentioned three problems that the external liquid level meter measuring head is installed have seriously influenced the result of use of external liquid level meter.This makes external liquid level meter need professional and technical personnel repetition test installation site on container of installation and maintenance experience, often safeguards.So that become the groundwork of service technician on these realitys of work.These problems have not only had a strong impact on the long-term stable operation effect of external liquid level meter, and have increased the difficulty and the workload of installation and maintenance greatly, have hindered extensively popularizing of external liquid level meter.
Summary of the invention
The objective of the invention is to, provide a cover to the external liquid level meter measuring head at foolproof accurate installation on its container outer wall installed surface, efficiently coupling and the simple and effective installation method and the device that clean automatically on the wall workplace within it.
The present invention is achieved in that a kind of device that improves installation efficiency of external liquid level meter, comprises the mounting plane that is arranged in the vessel bottom wall outside, is fixed on the measuring head mount pad of mounting plane and is vertically mounted on the self-stripping unit of vessel bottom wall inboard; Described self-stripping unit is made of waveguide pipe and the self-cleaning seat that is arranged on the waveguide pipe bottom; Described self-cleaning seat is made of annular element and the installation foot that is fixed on the annular element lower end, and the slit between the adjacent installation foot constitutes flow-guiding mouth; Described installation foot is fixedly mounted on the inboard position corresponding with mounting plane of vessel bottom wall.When liquid level rises and descend liquid will through flow-guiding mouth enter and flow out waveguide pipe to the waveguide pipe lower end over against the vessel bottom wall inner surface wash away, sediment can not piled up, played automatic cleaning action.
The flatness of described mounting plane less than 0.1mm, roughness greater than 1.6; The angle of described mounting plane and surface level points to 1/4 of angle less than measuring head-3dB.
A kind of application process that improves the device of installation efficiency of external liquid level meter, (1) is provided with mounting plane in the position that the vessel bottom wall outside installs and measures head; (2) fixation measuring head mount pad on described mounting plane; (3) on mounting plane, install and measure head by described measuring head mount pad, the measurement end face of measuring head and mounting plane are tightly coincide; (4) in the inboard position corresponding of vessel bottom wall self-stripping unit is installed, is made self-stripping unit perpendicular to the vessel bottom wall inboard with mounting plane; (5) keep the waveguide pipe center line concentric with the measuring head center line.
The right alignment of described step (5) waveguide pipe center line and measuring head center line is less than φ 0.1mm.
Beneficial effect of the present invention is: (1) is provided with mounting plane, on mounting plane, install and measure head, make liquid level gauge measuring head and the vessel bottom wall outside tight identical, improved the vibration signal transfer efficiency between measuring head and vessel bottom wall, received signal has been increased substantially; (2) can find best position exactly immediately by the measuring head mount pad, shorten the set-up time greatly and improved installation effectiveness; (3) can clean automatically measuring head right vessel bottom wall inboard, prevent that sediment pile from influencing the signal transmission, improve functional reliability (4) and used waveguide pipe, liquid level big ups and downs when preventing feed liquor, liquid flows rapidly and the vibration wave signal causes received signal to weaken to all directions scattering.Thereby improved quality and efficient that the external liquid level meter measuring head is installed, prolonged the external liquid level meter mission life
Description of drawings:
Fig. 1 is the synoptic diagram of measuring head erecting device of the present invention.
Wherein: 1 is liquid; 2 is mount pad; 3 is mounting plane; 4 is waveguide pipe; 5 is annular element; 6 is flow-guiding mouth; 7 is measuring head.
Embodiment:
Below in conjunction with accompanying drawing the present invention is done and to describe in further detail:
Referring to Fig. 1, one, install and measure the position of head in the vessel bottom wall outside, become the vessel bottom wall of convex mounting plane (3) to be used to install and measure head greater than the surface working of measuring head external diameter, for example be processed into
Mounting plane.The whole end face of measuring head has just all well touched chamber wall like this, has improved the efficient that vibration signal passes coupling surface between measuring head and the chamber wall widely.In order to guarantee the coupling coefficient height of measuring head and vessel bottom wall, the surface smoothness of measuring head mounting plane (3) should be less than 0.1 millimeter, for example smaller or equal to 0.05 millimeter.Surfaceness should be greater than 1.6.For the amplitude of the vibration signal that guarantees the liquid level reflection that measuring head receives is enough big, the angle α of measuring head mounting plane (3) and surface level should be as much as possible little.Because the vessel bottom wall center is often taken by pipeline and can't install and measure head, so angle α often can't equal 0 °.But the angle α of measuring head mounting plane (3) and surface level should for example just can make measuring head receive the vibration signals that enough strong liquid level reflects less than 3 ° less than 1/4 of the sensing angle of measuring head at least.Two, in container, survey in the diapire over against measuring head installed surface (3) and locate vertically to install anti-wave tube or claim waveguide pipe (4).Measuring head is only measured the stable liquid level in the waveguide pipe (4), neither is subjected to the influence of fluctuations of the outside liquid level of waveguide pipe, the influence that not flowed by the waveguide pipe outside liquid, and prevented signal dispersion.Install and measure a mount pad (2) over against the waveguide pipe place in the vessel bottom wall outside, the installation accuracy that guarantees measuring head in order to the installation site that behind coating anticorrosive coat and Jia Bao heat-insulation layer, still can identify measuring head significantly and simple and convenient ground.Measuring head mount pad (2) should be concentric with waveguide pipe (4) and measuring head installed surface (3), for example concentricity less than
Millimeter.Waveguide pipe should be installed perpendicular to surface level, for example limit waveguide pipe upper end apart from the distance of pedal line less than 10 millimeters.Three, the waveguide pipe lower end is supported on the self-cleaning seat (5).The lower end side of self-cleaning seat has flow-guiding mouth (6).When liquid level descends, liquid in the waveguide pipe will wash the vessel bottom wall inside surface of waveguide pipe lower end downwards when flow-guiding mouth outwards flows out, automatically clean, prevent inboard the locating of vessel bottom wall that the sediment pile in the liquid will pass through at vibration signal turnover measuring head.The clear jar of cycle that so just can prolonging stops production opens the container sediment cleaning.Make and in long-term work, needn't open the operate as normal that container is cleared up also can too much not influence external liquid level meter because of sediment.
Above content is to further describing that the present invention did in conjunction with concrete preferred implementation; can not assert that the specific embodiment of the present invention only limits to this; for the general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; can also make some simple deduction or replace, all should be considered as belonging to the scope of patent protection that the present invention is determined by claims of being submitted to.
Claims (4)
1. device that improves installation efficiency of external liquid level meter is characterized in that: comprise the mounting plane that is arranged on the vessel bottom wall outside, be fixed on the measuring head mount pad of mounting plane and be vertically mounted on the self-stripping unit of vessel bottom wall inboard; Described self-stripping unit is made of waveguide pipe and the self-cleaning seat that is arranged on the waveguide pipe bottom; Described self-cleaning seat is made of annular element and the installation foot that is fixed on the annular element lower end, and the slit between the adjacent installation foot constitutes flow-guiding mouth; Described installation foot is fixedly mounted on the inboard and corresponding position of mounting plane of vessel bottom wall, in the inboard position corresponding with mounting plane of vessel bottom wall self-stripping unit is installed, and makes self-stripping unit perpendicular to the vessel bottom wall inboard; Install and measure the position of head in the vessel bottom wall outside, become the vessel bottom wall of convex mounting plane to be used to install and measure head greater than the surface working of measuring head external diameter.
2. a kind of according to claim 1 device that improves installation efficiency of external liquid level meter is characterized in that: the flatness of described mounting plane less than 0.1mm, roughness greater than 1.6; The angle of described mounting plane and surface level points to 1/4 of angle less than measuring head.
3. based on the application process of claim 1 or 2 described devices, it is characterized in that: (1) is provided with mounting plane in the position that the vessel bottom wall outside installs and measures head; (2) fixation measuring head mount pad on described mounting plane; (3) on mounting plane, install and measure head by described measuring head mount pad, the measurement end face of measuring head and the tightly identical center of mounting plane are aligned with each other; (4) in the inboard position corresponding of vessel bottom wall self-stripping unit is installed, is made self-stripping unit perpendicular to the vessel bottom wall inboard with mounting plane; (5) keep the waveguide pipe center line concentric with the measuring head center line.
4. application process as claimed in claim 3 is characterized in that: the right alignment of described step (5) waveguide pipe center line and measuring head center line is less than φ 0.1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101545407A CN101813506B (en) | 2010-04-23 | 2010-04-23 | Device for improving installation efficiency of external liquid level meter and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101545407A CN101813506B (en) | 2010-04-23 | 2010-04-23 | Device for improving installation efficiency of external liquid level meter and application method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101813506A CN101813506A (en) | 2010-08-25 |
| CN101813506B true CN101813506B (en) | 2011-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010101545407A Active CN101813506B (en) | 2010-04-23 | 2010-04-23 | Device for improving installation efficiency of external liquid level meter and application method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1615007A1 (en) * | 2004-07-07 | 2006-01-11 | VEGA Grieshaber KG | Antenna assembly for radar level measuring device |
| EP1619482A1 (en) * | 2004-07-14 | 2006-01-25 | VEGA Grieshaber KG | Fluid level measuring device with a wave guide and a wave adapter |
| CN1977150A (en) * | 2004-07-01 | 2007-06-06 | 罗斯蒙特雷达液位股份公司 | Radar level gauge flange |
| CN201152765Y (en) * | 2007-12-19 | 2008-11-19 | 贵阳铝镁设计研究院 | Oil-water liquid level measurement mechanism for oil tank |
-
2010
- 2010-04-23 CN CN2010101545407A patent/CN101813506B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1977150A (en) * | 2004-07-01 | 2007-06-06 | 罗斯蒙特雷达液位股份公司 | Radar level gauge flange |
| EP1615007A1 (en) * | 2004-07-07 | 2006-01-11 | VEGA Grieshaber KG | Antenna assembly for radar level measuring device |
| EP1619482A1 (en) * | 2004-07-14 | 2006-01-25 | VEGA Grieshaber KG | Fluid level measuring device with a wave guide and a wave adapter |
| CN201152765Y (en) * | 2007-12-19 | 2008-11-19 | 贵阳铝镁设计研究院 | Oil-water liquid level measurement mechanism for oil tank |
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| Publication number | Publication date |
|---|---|
| CN101813506A (en) | 2010-08-25 |
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Address after: 710065 Shaanxi city of Xi'an province high tech Zone Guangde road F2B-5 Patentee after: XI'AN DINGHUA ELECTRONICS CO.,LTD. Address before: 710065 Shaanxi city of Xi'an province high tech Zone Guangde road F2B-5 Patentee before: XIAN DINGHUA ELECTRONICS Co.,Ltd. |
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Denomination of invention: Device for improving installation efficiency of external liquid level meter and application method thereof Effective date of registration: 20180821 Granted publication date: 20111005 Pledgee: Xi'an Hi-tech Emerging Industry Investment Fund Partnership (L.P.) Pledgor: XI'AN DINGHUA ELECTRONICS CO.,LTD. Registration number: 2018610000133 |
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Date of cancellation: 20220811 Granted publication date: 20111005 Pledgee: Xi'an Hi-tech Emerging Industry Investment Fund Partnership (L.P.) Pledgor: XI'AN DINGHUA ELECTRONICS CO.,LTD. Registration number: 2018610000133 |