CN106289453B - Liquid level detection device for gas station leakage detection - Google Patents
Liquid level detection device for gas station leakage detection Download PDFInfo
- Publication number
- CN106289453B CN106289453B CN201610697653.9A CN201610697653A CN106289453B CN 106289453 B CN106289453 B CN 106289453B CN 201610697653 A CN201610697653 A CN 201610697653A CN 106289453 B CN106289453 B CN 106289453B
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- China
- Prior art keywords
- liquid level
- rod body
- detection device
- blind hole
- light transmission
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- 238000001514 detection method Methods 0.000 title claims abstract description 45
- 239000007788 liquid Substances 0.000 title claims abstract description 37
- 230000005540 biological transmission Effects 0.000 claims abstract description 25
- 230000006698 induction Effects 0.000 claims abstract description 22
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 239000003921 oil Substances 0.000 claims description 27
- 239000000446 fuel Substances 0.000 claims description 9
- 239000004033 plastic Substances 0.000 claims description 9
- 229920002379 silicone rubber Polymers 0.000 claims description 4
- 239000004593 Epoxy Substances 0.000 claims description 3
- 238000005488 sandblasting Methods 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 abstract description 7
- 230000004308 accommodation Effects 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
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
- G01F23/292—Light, e.g. infrared or ultraviolet
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The application discloses a liquid level detection device for detecting leakage of a gas station, which comprises: a rod body having a receiving cavity; the oil inlet is arranged near the bottom surface of the rod body and is used for communicating the accommodating cavity with the outside; the fixing piece is arranged in the accommodating cavity and comprises a round blind hole and two light transmission through holes, the opening end of the round blind hole is positioned on the bottom surface of the fixing piece, one end of the light transmission through hole is positioned on the top surface of the fixing piece, and the other end of the light transmission through hole is positioned on the bottom surface of the round blind hole; a lens disposed in the accommodation chamber and having one end thereof embedded in the circular blind hole; the sealing blocking piece is arranged on the top surface of the rod body, and the lower end cover is arranged on the bottom surface of the rod body; and the induction circuit board is arranged between the sealing blocking piece and the fixing piece. The liquid level detection device provided by the application is used for detecting the leakage condition of the double-layer tank or the double-layer pipeline based on the infrared liquid identification principle, and has high detection precision.
Description
Technical Field
The application relates to the technical field of medium leakage detection, in particular to a liquid level detection device for detecting leakage of a gas station.
Background
With the soundness of the national environmental protection regulation system and the enhancement of national environmental protection consciousness, double-layer oil tanks and double-layer pipelines are used more and more in newly built and newly built gas stations. The double-layer oil tank is an oil storage tank formed by an inner tank and an outer tank which completely covers the inner tank, and an annular clearance space is arranged between the inner tank and the outer tank and is used for detecting the integrity of a double-layer structure so as to achieve the aim of preventing oil leakage; the double-layer pipeline is a pipeline formed by an inner pipe and an outer pipe which completely covers the inner pipe, and an annular clearance space is arranged between the inner pipe and the outer pipe. The leakage detection of the double-layer oil tank or the double-layer pipeline refers to that whether the oil tank or the pipeline leaks or not is judged by detecting the vacuum degree, the pressure, the oil gas or the liquid and the like in the annular gap space by adopting a direct or indirect method, and an alarm is immediately sent out once the oil tank or the pipeline leaks.
The sensor detection method monitors the integrity of the tank body or the pipeline by detecting the medium change in the annular clearance space of the double-layer oil tank or the double-layer pipeline so as to realize detection of leakage in the tank or below the liquid storage surface in the pipe. It is common practice to provide a test riser in communication with the interstitial space on the longitudinal centerline of the tank or pipe top and to provide a liquid level testing device at the lower portion of the test riser. As a key detection device of the sensor detection method, the accuracy and reliability of the liquid level detection device directly influence the accuracy of a leakage detection result.
Disclosure of Invention
The application aims to solve the technical problem of providing a liquid level detection device which adopts an infrared liquid identification principle, is accurate and reliable and is little interfered by the outside.
The application is realized by the following technical scheme:
a liquid level detection device for use in fuel station leak detection, comprising: a rod body having a receiving cavity; the oil inlet is arranged near the bottom surface of the rod body and is used for communicating the accommodating cavity with the outside; the fixing piece is arranged in the accommodating cavity and comprises a round blind hole and two light transmission through holes, the opening end of the round blind hole is positioned on the bottom surface of the fixing piece, one end of the light transmission through hole is positioned on the top surface of the fixing piece, and the other end of the light transmission through hole is positioned on the bottom surface of the round blind hole; a lens disposed in the accommodation chamber and having one end thereof embedded in the circular blind hole; the sealing blocking piece is arranged on the top surface of the rod body, and the lower end cover is arranged on the bottom surface of the rod body; and the induction circuit board is arranged between the sealing blocking piece and the fixing piece.
The liquid level detection device provided by the application is used for detecting the leakage condition of the double-layer tank or the double-layer pipeline based on the infrared liquid identification principle, and has high detection precision. When the double-layer tank or the double-layer pipeline is not leaked, infrared light emitted by the infrared light emitting device on the induction circuit board irradiates into the lens through one light transmission through hole, the lens reflects the infrared light, and the reflected light returns to the induction circuit board through the other light transmission through hole and is received by the photosensitive device on the induction circuit board; when the double-layer tank or the double-layer pipeline leaks, leaked liquid (water or oil) enters the accommodating cavity through the oil inlet hole, infrared light emitted by the infrared light emitting device on the induction circuit board irradiates into the lens through the light transmission through hole and is refracted into the liquid in the accommodating cavity, and the photosensitive device on the induction circuit board cannot receive or can only receive a small amount of infrared light, so that whether the double-layer tank or the double-layer pipeline leaks or not is judged. The liquid level detection device provided by the application adopts a closed structure, the induction circuit board is arranged in the closed accommodating cavity, and good tightness is realized by adopting a simple structure, so that the liquid level detection device is high in reliability and small in external interference.
Optionally, the number of the oil inlet holes is at least two, and each oil inlet hole is symmetrically distributed at the same horizontal position of the rod body. Through setting up two at least inlet ports, when double-deck jar or double-deck pipeline take place to leak, the liquid of leaking can go deep into the holding chamber more fast to improve the response speed of sensor.
Optionally, the fixing piece is a plastic piece. Through setting up the mounting as the plastic spare, utilize the plastic spare can take place elastic deformation's performance, can directly block the mounting in holding the intracavity, no longer need adopt unnecessary fixed means.
Optionally, the axis of the circular blind hole coincides with the axis of the fixing piece.
Optionally, the axis of the light transmission through hole is parallel to the axis of the fixing piece, and the two light transmission through holes are axisymmetric relative to the axis of the fixing piece.
Optionally, the lens includes a cylindrical portion and a conical portion, and a bottom surface of the cylindrical portion and a bottom area of the conical portion are equal; one end of the cylindrical part is embedded into the round blind hole, and the other end of the cylindrical part is connected with the bottom surface of the conical part.
Optionally, the surface of the lens 14 is sandblasted.
Optionally, the sealing plug is an epoxy end cap.
Optionally, the lower end cover is a plastic cover with at least one arc notch. After the leakage is repaired, the liquid accumulated in the probe can be automatically discharged out through the arc-shaped notch.
Optionally, a gap between the induction circuit board and the inner surface of the rod body is filled with silicone rubber. Through filling silicon rubber, can prevent that induction circuit board from taking place to rock in holding the chamber and damaging the components and parts on the circuit board to further improve liquid level detection device's reliability.
Compared with the prior art, the application has the following advantages and beneficial effects:
the liquid level detection device for the gas station leakage detection provided by the application is used for detecting the leakage condition of the double-layer tank or the double-layer pipeline based on the infrared liquid identification principle, and has high detection precision. The induction circuit board is arranged in the closed accommodating cavity by adopting a closed structure, and good sealing performance is realized by adopting a simple structure, so that reliability and anti-interference performance are improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings:
FIG. 1 is a schematic view of a liquid level detection apparatus according to an embodiment of the present application;
FIG. 2 is a cross-sectional view of a fastener of an embodiment of the present application;
FIG. 3 is a bottom view of a mount according to an embodiment of the present application;
FIG. 4 is a schematic view of a lens structure according to an embodiment of the present application;
fig. 5 is a schematic structural view of a lower end cap according to an embodiment of the present application.
In the drawings, the reference numerals and corresponding part names:
the device comprises a rod body 11, an oil inlet 12, a fixing piece 13, a lens 14, a sealing blocking piece 15, a lower end cover 16, a sensing circuit board 17, a round blind hole 21, a light transmission through hole 22, a cylindrical part 23 and a conical part 24.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present application, the present application will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present application and the descriptions thereof are for illustrating the present application only and are not to be construed as limiting the present application.
Examples
Fig. 1 is a schematic structural diagram of a liquid level detection device for detecting leakage of a gas station according to the present embodiment, where the liquid level detection device is used for detecting leakage of a double-layer tank or a double-layer pipe, and the liquid level detection device includes a rod 11, at least one oil inlet hole 12, a fixing member 13, a lens 14, a sealing plug 15, a lower end cover 16, and an induction circuit board 17.
Specifically, the rod 11 has a receiving cavity therein. In this embodiment, the accommodating cavity is cylindrical. The at least one oil inlet hole 12 is disposed near the bottom surface of the rod body 11, that is, the axis of each oil inlet hole 12 is perpendicular to the axis of the accommodating cavity, so as to communicate the accommodating cavity with the outside. The size of each oil inlet hole 12 and the distance from each oil inlet hole 12 to the bottom surface of the rod body 11 may be set according to practical requirements, for example, the distance from the lowest point of each oil inlet hole 12 to the bottom surface of the rod body 11 may be set to be greater than 3 mm. Further, the number of the oil inlet holes 12 may be at least two, and each oil inlet hole 12 is symmetrically distributed at the same horizontal position of the rod body 11.
The fixing member 13 is disposed in the accommodating chamber at a position higher than the oil inlet hole 12. Fig. 2 and 3 are a cross-sectional view and a bottom view, respectively, of the fixing member 13, the fixing member 13 including a circular blind hole 21 and two light transmission through holes 22. The open end of the circular blind hole 21 is located at the bottom surface of the fixing piece 13, one end of the light transmission through hole 22 is located at the top surface of the fixing piece 13, and the other end of the light transmission through hole 22 is located at the bottom surface of the circular blind hole 21. Further, the axis of the circular blind hole 21 coincides with the axis of the fixing member 13. In this embodiment, the light transmission through holes 22 are cylindrical through holes, the axes of which are parallel to the axis of the fixing member 13, and the two light transmission through holes 22 are axisymmetric with respect to the axis of the fixing member 13. The fixing piece 13 may be a plastic piece, and the fixing piece 13 may be directly clamped in the accommodating cavity by using elasticity of the plastic piece, so that no extra fixing means are needed.
The lens 14 is disposed in the receiving cavity with one end thereof inserted into the circular blind hole 21, and fig. 4 is a schematic view of the structure of the lens 14. The lens 14 comprises a cylindrical portion 23 and a conical portion 24, wherein the bottom surface of the cylindrical portion 23 is equal to the bottom surface of the conical portion 24, one end of the cylindrical portion 23 is embedded into the circular blind hole 21, and the other end of the cylindrical portion 23 is connected with the bottom surface of the conical portion 24. In this embodiment, the surface of the lens 14 is sandblasted. The probe light may be concentrated on the conical portion 24 by sand blasting to reduce light leakage and enhance the received signal.
The sealing plug 15 is disposed on the top surface of the rod 11, and may be an epoxy end cap, so as to seal the top surface of the rod 11. The lower end cover 16 is disposed on the bottom surface of the rod 11. Fig. 5 is a schematic structural view of the lower end cover 16, and in this embodiment, the lower end cover 16 is a plastic cover having at least one arc-shaped notch. The induction circuit board 17 is arranged between the sealing blocking piece 15 and the fixing piece 13, and a gap between the sealing blocking piece and the inner surface of the rod body 11 is filled with silicon rubber so as to fix the induction circuit board 17, so that the induction circuit board 17 is prevented from shaking in the accommodating cavity to damage electronic components.
When detecting whether double-deck jar or double-deck pipeline take place to leak, place the liquid level detection device of this embodiment in double-deck jar or double-deck pipeline's detection riser lower part. When no leakage occurs in the double-layer tank or the double-layer pipeline, infrared light emitted by the infrared light emitting device on the induction circuit board 17 irradiates into the lens 14 through one light transmission through hole, the lens 14 reflects the infrared light, and the reflected light returns to the induction circuit board 17 through the other light transmission through hole and is received by the photosensitive device on the induction circuit board 17; when the double-layer tank or the double-layer pipeline leaks, leaked liquid (water or oil) enters the accommodating cavity through the oil inlet hole 12, infrared light emitted by the infrared light emitting device on the induction circuit board 17 irradiates into the lens 14 through a light transmission through hole and is refracted into the liquid in the accommodating cavity, and the photosensitive device on the induction circuit board 17 cannot receive or can only receive a small amount of infrared light. The sensing circuit board 17 converts the received optical signal into an electrical signal and transmits the electrical signal to a level transmitter located outside the double tank or double pipe through a cable passing through the sealing plug 15. According to the magnitude of the electric signal, whether the double-layer tank or the double-layer pipeline leaks in a sounding way can be judged.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the application, and is not meant to limit the scope of the application, but to limit the application to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the application are intended to be included within the scope of the application.
Claims (6)
1. A liquid level detection device for use in a fuel station leak detection, comprising: a rod body (11) having a receiving cavity; at least one oil inlet hole (12) which is arranged near the bottom surface of the rod body (11) and is used for communicating the accommodating cavity with the outside; the fixing piece (13) is arranged in the accommodating cavity, the fixing piece (13) comprises a round blind hole (21) and two light transmission through holes (22), the opening end of the round blind hole (21) is positioned on the bottom surface of the fixing piece (13), one end of the light transmission through hole (22) is positioned on the top surface of the fixing piece (13), and the other end of the light transmission through hole (22) is positioned on the bottom surface of the round blind hole (21); a lens (14) arranged in the accommodating cavity and one end of which is embedded in the circular blind hole (21); a sealing plug (15) arranged on the top surface of the rod body (11) and a lower end cover (16) arranged on the bottom surface of the rod body (11); an induction circuit board (17) disposed between the seal plug (15) and the fixing member (13);
the lens (14) comprises a cylindrical part (23) and a conical part (24), wherein the bottom surface of the cylindrical part (23) and the bottom area of the conical part (24) are equal;
one end of the cylindrical part (23) is embedded into the round blind hole (21), and the other end of the cylindrical part (23) is connected with the bottom surface of the conical part (24);
the surface of the lens (14) is subjected to sand blasting;
the lower end cover (16) is a plastic cover with at least one arc notch;
the gap between the induction circuit board (17) and the inner surface of the rod body (11) is filled with silicon rubber.
2. The liquid level detection device for fuel station leak detection according to claim 1, wherein the number of the fuel inlet holes (12) is at least two, and each fuel inlet hole (12) is symmetrically distributed at the same horizontal position of the rod body (11).
3. The liquid level detection device for fuel station leak detection according to claim 1, characterized in that the fixing member (13) is a plastic member.
4. A liquid level detection device for fuel station leak detection according to claim 1, characterized in that the axis of the circular blind hole (21) coincides with the axis of the fixture (13).
5. The liquid level detection device for fuel station leak detection according to claim 4, characterized in that the axis of the light transmission through holes (22) is parallel to the axis of the fixture (13), and that the two light transmission through holes (22) are axisymmetric with respect to the axis of the fixture (13).
6. The liquid level detection device for fuel station leak detection according to claim 1, characterized in that the sealing plug (15) is an epoxy end cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610697653.9A CN106289453B (en) | 2016-08-22 | 2016-08-22 | Liquid level detection device for gas station leakage detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610697653.9A CN106289453B (en) | 2016-08-22 | 2016-08-22 | Liquid level detection device for gas station leakage detection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106289453A CN106289453A (en) | 2017-01-04 |
| CN106289453B true CN106289453B (en) | 2023-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610697653.9A Active CN106289453B (en) | 2016-08-22 | 2016-08-22 | Liquid level detection device for gas station leakage detection |
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| CN (1) | CN106289453B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108871504A (en) * | 2018-07-27 | 2018-11-23 | 青岛澳科仪器有限责任公司 | A kind of detection device and detection method |
| CN116692294B (en) * | 2023-08-03 | 2023-10-20 | 中国石油天然气股份有限公司甘肃销售分公司 | Liquid level detection device for gas station leakage detection |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101828101A (en) * | 2007-10-17 | 2010-09-08 | 科桑克里斯普兰特公司 | Gas leak detector, and a method for gas leak detection |
| CN103596608A (en) * | 2011-03-31 | 2014-02-19 | 株式会社根本杏林堂 | Leakage detection sensor and drug infusion system |
| CN203758578U (en) * | 2014-02-27 | 2014-08-06 | 苏州中崟传感股份有限公司 | Photoelectric liquid level sensor |
| CN105758797A (en) * | 2014-12-16 | 2016-07-13 | 有研国晶辉新材料有限公司 | Sample cell suitable for infrared spectroscopic analysis of corrosive liquid by liquid membrane method |
| CN205898250U (en) * | 2016-08-22 | 2017-01-18 | 绵阳高新区恒奥电子科技有限公司 | A level sensor for leak testing |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101387514B (en) * | 2008-08-28 | 2010-07-28 | 上海科勒电子科技有限公司 | Distance detecting induction device |
-
2016
- 2016-08-22 CN CN201610697653.9A patent/CN106289453B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101828101A (en) * | 2007-10-17 | 2010-09-08 | 科桑克里斯普兰特公司 | Gas leak detector, and a method for gas leak detection |
| CN103596608A (en) * | 2011-03-31 | 2014-02-19 | 株式会社根本杏林堂 | Leakage detection sensor and drug infusion system |
| CN203758578U (en) * | 2014-02-27 | 2014-08-06 | 苏州中崟传感股份有限公司 | Photoelectric liquid level sensor |
| CN105758797A (en) * | 2014-12-16 | 2016-07-13 | 有研国晶辉新材料有限公司 | Sample cell suitable for infrared spectroscopic analysis of corrosive liquid by liquid membrane method |
| CN205898250U (en) * | 2016-08-22 | 2017-01-18 | 绵阳高新区恒奥电子科技有限公司 | A level sensor for leak testing |
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| CN106289453A (en) | 2017-01-04 |
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