CN205898250U - A level sensor for leak testing - Google Patents
A level sensor for leak testing Download PDFInfo
- Publication number
- CN205898250U CN205898250U CN201620913051.8U CN201620913051U CN205898250U CN 205898250 U CN205898250 U CN 205898250U CN 201620913051 U CN201620913051 U CN 201620913051U CN 205898250 U CN205898250 U CN 205898250U
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- level sensor
- rod
- liquid level
- hole
- fixture
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Abstract
The utility model discloses a level sensor for leak testing, include: the body of rod that holds the chamber has, the setting is being close to body of rod bottom surface, be used for with at least one inlet port that holds chamber and external intercommunication, the setting is in hold the mounting in the chamber, the mounting includes circular blind hole and two optical transmission through -holes, the open end of circular blind hole is located the mounting bottom surface, the one end of optical transmission through -hole is located the mounting top surface, the other end of optical transmission through -hole is located circular blind hole bottom surface, the setting is in hold just one end embedding in the chamber the lens of circular blind hole, the setting is in the sealed stifled plug member and the setting of body of rod top surface are in the bottom end cover of body of rod bottom surface, the setting is in sealed stifled plug member with sensing circuit board between the mounting. The utility model provides a level sensor discerns the leakage condition that the principle detected double -deck jar or double skin duct based on infrared liquid, and the detection precision is high.
Description
Technical field
This utility model is related to dielectric leakage detection technique field and in particular to a kind of level sensing for Leak Detection
Device.
Background technology
With the enhancing of the sound of national environmental protection Legal System and national environmental consciousness, in newly-built and reorganization and expansion oiling
Start in standing more old manyly use two-compartment oil tank and double-skin duct.Two-compartment oil tank refers to by inner canister with by inner canister cladding completely
The oil storage tank that outer tank is constituted, has annular clearance space, for detecting double-deck integrity, to reach between inner and outer tank
To the purpose preventing oil leak；Double-skin duct refers to the pipeline by inner tube and constituting the outer tube of inner tube cladding completely, inner tube
There is and outer tube between annular clearance space.The Leak Detection of two-compartment oil tank or double-skin duct refers to using directly or indirectly
Method by oil tank or pipe are judged to the detection of the vacuum in annular clearance space, pressure, oil gas or liquid etc.
Whether road leaks, and leakage accident once in oil tank or pipeline, send alarm immediately.
Sensor method be by detect the media variations in two-compartment oil tank or double-skin duct annular clearance space Lai
Monitoring tank body or the integrity of pipeline, to realize appearing below the detection of seepage to liquid storage face in tank or in pipe.Generally do
Method is to arrange the detection standpipe connecting with clearance space on the longitudinal centre line at oil tank or pipeline top, under detection standpipe
Portion arranges liquid level sensor.As the crucial detection device of sensor method, the precision of liquid level sensor and reliability are direct
Impact Leak Detection result accuracy.
Utility model content
It is to provide one kind using infrared liquid recognition principle, accurately reliability in technical problem to be solved in the utility model
And by the little liquid level sensor of external interference.
This utility model is achieved through the following technical solutions:
A kind of liquid level sensor for Leak Detection, comprising: there is the body of rod of accommodating chamber；It is positioned close to the described body of rod
Bottom surface, at least one fuel feed hole for connecting described accommodating chamber with the external world；It is arranged on the fixture in described accommodating chamber, institute
State fixture and include blind round hole and two optical transport through holes, the opening of described blind round hole is located at described fixture bottom surface,
One end of described optical transport through hole is located at described fixture top surface, and the other end of described optical transport through hole is located at described blind round hole
Bottom surface；It is arranged in described accommodating chamber and one end embeds the lens of described blind round hole；It is arranged on the sealing of described body of rod top surface
Type of tamper evidence and the bottom end cover being arranged on described body of rod bottom surface；It is arranged on the sense between described sealing type of tamper evidence and described fixture
Answer circuit board.
The liquid level sensor that this utility model provides, detects double-layer tank or double-skin duct based on infrared liquid recognition principle
Leakage situation, accuracy of detection is high.When there is not leakage in double-layer tank or double-skin duct, the infraluminescence in sensor circuit plate
The infrared light that device sends is irradiated into lens through an optical transport through hole, and lens reflect to infrared light, and reflected light is through another
Individual optical transport through hole returns to sensor circuit plate, is received by the light-sensitive device in sensor circuit plate；When double-layer tank or bilayer
When pipeline occurs leakage, leakage liquid (water or oil) enters accommodating chamber, the infrared illuminator in sensor circuit plate through fuel feed hole
The infrared light that part sends is irradiated into lens through an optical transport through hole, then is refracted in the liquid of accommodating chamber, in sensor circuit plate
Light-sensitive device can not receive or a small amount of Infrared can only be received, double-layer tank or double-skin duct whether sounding is judged with this
Leakage.The liquid level sensor that this utility model provides adopts enclosed construction, sensor circuit plate is placed in airtight receiving intracavity, adopts
Realize good sealing with simple structure, reliability is high, little by external interference.
Optionally, the quantity of described fuel feed hole is at least two, and each fuel feed hole is symmetrically distributed in the same of the described body of rod
Horizontal level.By arranging at least two fuel feed holes, when double-layer tank or double-skin duct occur leakage, the liquid of leakage can
Quickly go deep into accommodating chamber, thus improving the response speed of sensor.
Optionally, described fixture is plastic parts.By fixture is set to plastic parts, using plastic parts, bullet can occur
Property deformation performance, directly fixture can be stuck in and accommodate intracavity it is not necessary to adopt unnecessary fixing means again.
Optionally, the dead in line of the axis of described blind round hole and described fixture.
Optionally, the diameter parallel of the axis of described optical transport through hole and described fixture, and two optical transport through hole phases
For described fixture axis axisymmetricly.
Optionally, described lens include cylindrical portion and conus portion, the bottom of the floor space of described cylindrical portion and described conus portion
Area equation；One end of described cylindrical portion embeds described blind round hole, and the other end of described cylindrical portion connects described conus portion
Bottom surface.
Optionally, described sealing type of tamper evidence is epoxy resin end cap.
Optionally, described bottom end cover is the plastic cement capping with least one arc notch.After leakage repair, amass in probe
In liquid can be gone out by described arc notch automatic-discharging.
Optionally, described bottom end cover is half logical nut, the described body of rod by be arranged on the external screw thread of its outer surface with described
The female thread of half logical nut connects.By bottom end cover is set to half logical nut, discharging liquid or accommodating after leakage repair
It is convenient to take off bottom end cover when blocking in chamber.
Optionally, the space between described sensor circuit plate and described body of rod inner surface is filled with silicone rubber.By filling
Silicone rubber, can prevent sensor circuit plate from shaking in accommodating chamber and damaging the components and parts on circuit board, thus carrying further
The reliability of high level sensor.
This utility model compared with prior art, has such advantages as and beneficial effect:
The liquid level sensor for Leak Detection that this utility model provides, is detected double-deck based on infrared liquid recognition principle
Tank or the leakage situation of double-skin duct, accuracy of detection is high.It adopts enclosed construction, and sensor circuit plate is placed in airtight receiving
Intracavity, realizes good sealing using simple structure, thus improving reliability and interference free performance.
Brief description
Accompanying drawing described herein is used for providing this utility model embodiment is further understood, and constitutes the one of the application
Part, does not constitute the restriction to this utility model embodiment.In the accompanying drawings:
Fig. 1 is a kind of structural representation of the liquid level sensor of embodiment of this utility model；
Fig. 2 is the sectional view of the fixture of this utility model embodiment；
Fig. 3 is the upward view of the fixture of this utility model embodiment；
Fig. 4 is the structural representation of the lens of this utility model embodiment；
Fig. 5 is the structural representation of the bottom end cover of this utility model embodiment；
Fig. 6 is the structural representation of the liquid level sensor of this utility model another kind embodiment.
Labelling and corresponding parts title in accompanying drawing:
The 11- body of rod, 12- fuel feed hole, 13- fixture, 14- lens, 15- seals type of tamper evidence, 16- bottom end cover, 17- faradism
Road plate, 21- blind round hole, 22- optical transport through hole, 23- cylindrical portion, 24- conus portion.
Specific embodiment
For making the purpose of this utility model, technical scheme and advantage become more apparent, with reference to embodiment and accompanying drawing,
The utility model is described in further detail, and exemplary embodiment of the present utility model and its explanation are only used for explaining this
Utility model, is not intended as to restriction of the present utility model.
Embodiment 1
Fig. 1 is the structural representation of the liquid level sensor for Leak Detection of the present embodiment, and described liquid level sensor is used
In the leakage situation of detection double-layer tank or double-skin duct, including the body of rod 11, at least one fuel feed hole 12, fixture 13, lens
14th, sealing type of tamper evidence 15, bottom end cover 16 and sensor circuit plate 17.
Specifically, inside the described body of rod 11, there is accommodating chamber.In the present embodiment, described accommodating chamber is cylinder.Described
At least one fuel feed hole 12 is positioned close to the described body of rod 11 bottom surface, i.e. the axle of the axis of each fuel feed hole 12 and described accommodating chamber
Line is vertical, for connecting described accommodating chamber with the external world.The size of each fuel feed hole 12 and each fuel feed hole 12 arrive described bar
The distance of body 11 bottom surface can be configured according to the actual requirements, and the minimum point that for example can arrange each fuel feed hole 12 is to described bar
The distance of body 11 bottom surface is more than 3 millimeters.Further, the quantity of described fuel feed hole 12 could be arranged at least two, each oil-feed
Hole 12 is symmetrically distributed in the same level position of the described body of rod 11.
Described fixture 13 is arranged in described accommodating chamber, and its position is higher than described fuel feed hole 12.Fig. 2 and Fig. 3 be respectively
The sectional view of described fixture 13 and upward view, described fixture 13 includes blind round hole 21 and two optical transport through holes 22.Institute
The opening stating blind round hole 21 is located at described fixture 13 bottom surface, and one end of described optical transport through hole 22 is located at described fixture
13 top surfaces, the other end of described optical transport through hole 22 is located at described blind round hole 21 bottom surface.Further, described blind round hole 21
Axis and the dead in line of described fixture 13.In the present embodiment, described optical transport through hole 22 is cylindrical hole, its axis
With the diameter parallel of described fixture 13, and two optical transport through holes 22 with respect to described fixture 13 axis axisymmetricly.
Described fixture 13 can be plastic parts, using the elasticity of plastic parts itself, directly described fixture 13 can be stuck in described appearance
Receive intracavity it is not necessary to adopt unnecessary fixing means again.
Described lens 14 are arranged in described accommodating chamber and one end embeds described blind round hole 21, and Fig. 4 is described lens 14
Structural representation.Described lens 14 include cylindrical portion 23 and conus portion 24, the floor space of described cylindrical portion 23 and described circular cone
The floor space in portion 24 is equal, and one end of described cylindrical portion 23 embeds described blind round hole 21, and the other end of described cylindrical portion 23 is even
Connect the bottom surface of described conus portion 24.In the present embodiment, the surface of described lens 14 is through blasting treatment.Through blasting treatment,
Probing light can be made to concentrate on described conus portion 24, to reduce light leak and to strengthen receipt signal.
Described sealing type of tamper evidence 15 is arranged on the described body of rod 11 top surface, can be epoxy resin end cap, with to the described body of rod
11 top surfaces are sealed.Described bottom end cover 16 is arranged on the described body of rod 11 bottom surface.Fig. 5 is the structural representation of described bottom end cover 16
Figure, in the present embodiment, described bottom end cover 16 is the plastic cement capping with least one arc notch.Described sensor circuit plate 17
It is arranged between described sealing type of tamper evidence 15 and described fixture 13, itself space and the described body of rod 11 inner surface between is filled with
Silicone rubber, described sensor circuit plate 17 is fixing, it is to avoid described sensor circuit plate 17 is rocked in accommodating chamber and damaged electronics
Components and parts.
When whether detection double-layer tank or double-skin duct occur leakage, the liquid level sensor of the present embodiment is placed on bilayer
The detection standpipe bottom of tank or double-skin duct.When double-layer tank or double-skin duct do not occur leakage, in sensor circuit plate 17
The infrared light that sends of infrared light-emitting device be irradiated into lens 14 through an optical transport through hole, lens 14 are carried out instead to infrared light
Penetrate, reflected light returns to sensor circuit plate 17 through another optical transport through hole, is connect by the light-sensitive device in sensor circuit plate 17
Receive；When double-layer tank or double-skin duct occur leakage, leakage liquid (water or oil) enters accommodating chamber, sensing through fuel feed hole 12
The infrared light that infrared light-emitting device on circuit board 17 sends is irradiated into lens 14 through an optical transport through hole, then is refracted to receiving
In the liquid in chamber, the light-sensitive device in sensor circuit plate 17 can not receive or can only receive a small amount of Infrared.Sensor circuit
The optical signal of reception is converted to the signal of telecommunication by plate 17, and by the cable through sealing type of tamper evidence 15 by electric signal transmission to being located at
Fluid level transmitter outside double-layer tank or double-skin duct.Size according to the signal of telecommunication is it is possible to judge double-layer tank or bilayer
Whether sounding leaks pipeline.
Embodiment 2
Fig. 6 is the structural representation of the liquid level sensor of the present embodiment.Compared with Example 1, difference is: bottom end cover 16
Lead to nut for half, the body of rod 11 is connected with the female thread of described half logical nut by being arranged on the external screw thread of its outer surface.By inciting somebody to action
Described bottom end cover 16 is set to half logical nut, it is convenient to by described bottom end cover 16 when blocking in accommodating chamber
Take off.Further, described half logical sealing rubber ring can also be set between nut and the described body of rod 11.
Above-described specific embodiment, is entered to the purpose of this utility model, technical scheme and beneficial effect
One step describes in detail, be should be understood that and the foregoing is only specific embodiment of the present utility model, is not used to limit
Fixed protection domain of the present utility model, all any modifications within spirit of the present utility model and principle, made, equivalent replaces
Change, improve, should be included within protection domain of the present utility model.
Claims (10)
1. a kind of liquid level sensor for Leak Detection is it is characterised in that include: has the body of rod (11) of accommodating chamber；Setting
Near the described body of rod (11) bottom surface, at least one fuel feed hole (12) for connecting described accommodating chamber with the external world；It is arranged on
Fixture (13) in described accommodating chamber, described fixture (13) includes blind round hole (21) and two optical transport through holes (22),
The opening of described blind round hole (21) is located at described fixture (13) bottom surface, and one end of described optical transport through hole (22) is located at institute
State fixture (13) top surface, the other end of described optical transport through hole (22) is located at described blind round hole (21) bottom surface；It is arranged on institute
State in accommodating chamber and one end embeds the lens (14) of described blind round hole (21)；It is arranged on the seal plug of the described body of rod (11) top surface
Plug member (15) and the bottom end cover (16) being arranged on the described body of rod (11) bottom surface；It is arranged on described sealing type of tamper evidence (15) and described
Sensor circuit plate (17) between fixture (13).
2. the liquid level sensor for Leak Detection according to claim 1 is it is characterised in that described fuel feed hole (12)
Quantity is at least two, and each fuel feed hole (12) is symmetrically distributed in the same level position of the described body of rod (11).
3. the liquid level sensor for Leak Detection according to claim 1 is it is characterised in that described fixture (13) is
Plastic parts.
4. the liquid level sensor for Leak Detection according to claim 1 is it is characterised in that described blind round hole (21)
Axis and described fixture (13) dead in line.
5. the liquid level sensor for Leak Detection according to claim 4 is it is characterised in that described optical transport through hole
(22) axis and the diameter parallel of described fixture (13), and two optical transport through holes (22) are with respect to described fixture (13)
Axis axisymmetricly.
6. the liquid level sensor for Leak Detection according to claim 1 is it is characterised in that described lens (14) include
Cylindrical portion (23) and conus portion (24), the floor space of described cylindrical portion (23) and the floor space of described conus portion (24) are equal；
One end of described cylindrical portion (23) embeds described blind round hole (21), and the other end of described cylindrical portion (23) connects described circle
The bottom surface in tapering (24).
7. the liquid level sensor for Leak Detection according to claim 1 is it is characterised in that described sealing type of tamper evidence
(15) it is epoxy resin end cap.
8. the liquid level sensor for Leak Detection according to claim 1 is it is characterised in that described bottom end cover (16) is
There is the plastic cement capping of at least one arc notch.
9. the liquid level sensor for Leak Detection according to claim 1 is it is characterised in that described bottom end cover (16) is
Half logical nut, the described body of rod (11) is connected with the female thread of described half logical nut by being arranged on the external screw thread of its outer surface.
10. the liquid level sensor for Leak Detection according to any one of claim 1 to 9 is it is characterised in that described sense
The space between circuit board (17) and the described body of rod (11) inner surface is answered to be filled with silicone rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620913051.8U CN205898250U (en) | 2016-08-22 | 2016-08-22 | A level sensor for leak testing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620913051.8U CN205898250U (en) | 2016-08-22 | 2016-08-22 | A level sensor for leak testing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205898250U true CN205898250U (en) | 2017-01-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620913051.8U Active CN205898250U (en) | 2016-08-22 | 2016-08-22 | A level sensor for leak testing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106289453A (en) * | 2016-08-22 | 2017-01-04 | 绵阳高新区恒奥电子科技有限公司 | Liquid level detection device for gas station's leak detection |
-
2016
- 2016-08-22 CN CN201620913051.8U patent/CN205898250U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106289453A (en) * | 2016-08-22 | 2017-01-04 | 绵阳高新区恒奥电子科技有限公司 | Liquid level detection device for gas station's leak detection |
| CN106289453B (en) * | 2016-08-22 | 2023-12-01 | 绵阳高新区恒奥电子科技有限公司 | Liquid level detection device for gas station leakage detection |
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| GR01 | Patent grant |