CN107747992A - A kind of radar wave guide for level gauging - Google Patents
A kind of radar wave guide for level gauging Download PDFInfo
- Publication number
- CN107747992A CN107747992A CN201710887963.1A CN201710887963A CN107747992A CN 107747992 A CN107747992 A CN 107747992A CN 201710887963 A CN201710887963 A CN 201710887963A CN 107747992 A CN107747992 A CN 107747992A
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- CN
- China
- Prior art keywords
- waveguide
- pipes
- wave guide
- waveguide pipe
- level gauging
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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.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The present invention relates to a kind of radar wave guide for level gauging, including several waveguide pipes, several waveguide pipes are sequentially connected with up and down, the connection end of waveguide pipe is angle stake, upper port positioned at the waveguide pipe at top is provided with adpting flange, the angle stake of two adjacent waveguide pipes is correspondingly arranged up and down, and the junction of adjacent two waveguide pipes is arranged branch sleeve.The present invention solves the problems, such as the interference echo of inwall and segmented seam by the way of boxing is segmented.
Description
Technical field
The invention belongs to the technical field of ship auxiliary level gauging, a kind of more particularly to radar for level gauging is led
Wave duct.
Background technology
The different technical characteristics that radar type liquid level sensor is popped one's head according to it, be subdivided into contact (with measured medium) and
Contactless, contact is referred to as being oriented to microwave type liquid level sensor, and contactless is referred to as radar level sensor.Contact
When being oriented to the more commonly used of microwave type liquid level sensor, but being applied to the liquid tank of some special constructions, blind area is excessive, measurement
The maximum liquid tank dead band in dead band accounts for the 15% of total volume of compartment, accounts for 19% of total height or so, beyond the scope of user's tolerance.
The operating frequency range of contactless sensor radar ripple is 6~26GHz, and measurement range is 0.3~20m, essence
0.1%FS or 10mm, the permittivity ε ＞ 1.6 of medium are spent, field angle is 8~20 °, and its ratio of precision is higher.It is but contactless
The application scenario of radar level sensor it is more be rule large-scale liquid tank, if for the baroque liquid tank of narrow space
Need to measure using waveguide pipe, its principle is：Waveguide pipe is installed in liquid tank or is connected with liquid tank, the liquid level in waveguide pipe
It is equal to the liquid level of liquid tank, the measurement to liquid level in waveguide pipe can obtain the liquid level of liquid tank, and blind area can be controlled 5%
Within.
For contactless radar level sensor, the key of its application success is that the performance of waveguide pipe, it is desirable to
Its inwall is not easy bridging, possesses certain finish, and interference echo is not more than 50dB.Due to being difficult to using homogeneous tube manufacture installation
Mode, waveguide pipe often using segmentation manufacture, install by the mode of on-site consolidation.Traditional waveguide pipe is connected using flange flat mouth
The problem of connecing, existing is that the gap of its seam crossing is difficult to control, and its interference echo is difficult to accomplish to be less than 50dB.
The content of the invention
It is an object of the invention to provide a kind of radar wave guide for level gauging for above-mentioned technical need, solution
The certainly interference echo problem of inwall and segmented seam.
To achieve these goals, the present invention adopts the following technical scheme that：A kind of radar wave guide for level gauging,
It is characterized in that：Including several waveguide pipes, several waveguide pipes are sequentially connected with up and down, and the connection end of waveguide pipe is mitered
Mouthful, adpting flange is provided with positioned at the upper port of the waveguide pipe at top, the angle stake of adjacent two waveguide pipes is correspondingly arranged up and down,
The junction of adjacent two waveguide pipes is arranged branch sleeve.
By such scheme, the branch sleeve and the guided wave ligament coordinate, the upper and lower ends of branch sleeve respectively with
The outer wall of adjacent two waveguide pipes is weldingly connected.
By such scheme, the angle of inclination of the angle stake of the waveguide pipe is 70 °~80 °.
By such scheme, the waveguide pipe and branch sleeve are made of stainless steel, at the inner surface polishing of waveguide pipe
Reason.
The beneficial effects of the invention are as follows：A kind of radar wave guide for level gauging is provided, is segmented the waveguide pipe of connection
Can Assembling, flexible modulation length, branch sleeve and waveguide pipe are improved the axiality of interface, are easy to using gap cooperation
Assembling, waveguide pipe segmentation are docked using angle stake, and the reflection echo of seam crossing is disperseed, and microwave signal is reflected back spy in seam crossing
The time of head signal is elongated, it is impossible to stronger interference signal is formed, the signal for solving traditional flat mouth face seam very well concentrates,
Intensity is more than the problem of 50dB.
Brief description of the drawings
Fig. 1 is the structural representation of one embodiment of the invention.
Wherein：Waveguide pipe 1, adpting flange 2, branch sleeve 3, liquid tank top plate 4.
Embodiment
Embodiment of the present invention is illustrated in conjunction with accompanying drawing, the invention is not limited in following embodiments.
As shown in figure 1, a kind of radar wave guide for level gauging, including several waveguide pipes 1, above and below several waveguide pipes
It is sequentially connected with, the connection end of waveguide pipe is angle stake, and the upper port positioned at the waveguide pipe at top is provided with adpting flange 2, with biography
Sensor is connected, and the angle stake of adjacent two waveguide pipes is correspondingly arranged up and down, and the junction of adjacent two waveguide pipes is arranged connection
Sleeve 3, waveguide pipe are weldingly connected through liquid tank top plate with liquid tank top plate.
Branch sleeve and guided wave ligament coordinate, fit precision 9 grades (H9/h9), the upper and lower ends of branch sleeve respectively with
The outer wall of adjacent two waveguide pipes is weldingly connected, weld bead height 5mm, and the gap between two sections of waveguide pipes is not more than 0.1mm.
The angle of inclination of the angle stake of waveguide pipe is 70 °~80 °, and preferably 75 °, now, the interference echo of waveguide pipe is
48.95dB, measurement accuracy 1.9%, the interference echo of traditional flat mouth connection waveguide pipe reach 60~70dB, precision 3.8
~4.0%.
Waveguide pipe and branch sleeve are made of stainless steel, and its length determines according to specific height of tank, waveguide pipe
Inner surface polishing.
Claims (4)
- A kind of 1. radar wave guide for level gauging, it is characterised in that：Including several waveguide pipes, in several waveguide pipes Under be sequentially connected with, the connection end of waveguide pipe is angle stake, and adpting flange is provided with positioned at the upper port of the waveguide pipe at top, adjacent Two waveguide pipes angle stake up and down be correspondingly arranged, the junction of adjacent two waveguide pipes is arranged branch sleeve.
- A kind of 2. radar wave guide for level gauging according to claim 1, it is characterised in that the branch sleeve Coordinate with the guided wave ligament, the outer wall of the upper and lower ends of branch sleeve respectively with adjacent two waveguide pipes is weldingly connected.
- 3. a kind of radar wave guide for level gauging according to claim 1, it is characterised in that the waveguide pipe The angle of inclination of angle stake is 70 °~80 °.
- A kind of 4. radar wave guide for level gauging according to claim 1, it is characterised in that the waveguide pipe and Branch sleeve is made of stainless steel, the inner surface polishing of waveguide pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710887963.1A CN107747992A (en) | 2017-09-27 | 2017-09-27 | A kind of radar wave guide for level gauging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710887963.1A CN107747992A (en) | 2017-09-27 | 2017-09-27 | A kind of radar wave guide for level gauging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107747992A true CN107747992A (en) | 2018-03-02 |
Family
ID=61255080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710887963.1A Pending CN107747992A (en) | 2017-09-27 | 2017-09-27 | A kind of radar wave guide for level gauging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107747992A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020067229A1 (en) * | 2000-12-01 | 2002-06-06 | Wilhelm Lubbers | Microwave window |
| CN101008581A (en) * | 2006-01-27 | 2007-08-01 | 李鑫钰 | Laser measurement liquid level meter |
| CN105874306A (en) * | 2013-12-19 | 2016-08-17 | Vega格里沙贝两合公司 | Radar-operated level gauge |
-
2017
- 2017-09-27 CN CN201710887963.1A patent/CN107747992A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020067229A1 (en) * | 2000-12-01 | 2002-06-06 | Wilhelm Lubbers | Microwave window |
| CN101008581A (en) * | 2006-01-27 | 2007-08-01 | 李鑫钰 | Laser measurement liquid level meter |
| CN105874306A (en) * | 2013-12-19 | 2016-08-17 | Vega格里沙贝两合公司 | Radar-operated level gauge |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180302 |
|
| RJ01 | Rejection of invention patent application after publication |