CN205647482U - Photoelectric type liquid level switch - Google Patents
Photoelectric type liquid level switch Download PDFInfo
- Publication number
- CN205647482U CN205647482U CN201620419020.7U CN201620419020U CN205647482U CN 205647482 U CN205647482 U CN 205647482U CN 201620419020 U CN201620419020 U CN 201620419020U CN 205647482 U CN205647482 U CN 205647482U
- Authority
- CN
- China
- Prior art keywords
- liquid level
- level switch
- light
- reflecting part
- lens
- Prior art date
- 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.)
- Expired - Fee Related
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The utility model provides a photoelectric type liquid level switch, its characterized in that: it includes the reflecting part, casing and coupling nut, the reflecting part is the tubular structure, and it includes screw in end and first link, the top of screw in end is equipped with lens, the casing includes optical coupling end and second link, the optical coupling is served and is equipped with the light -emitting window and goes into the light mouth, the inside circuit structure that is equipped with of casing, last optical emitter and the optical receiver of being equipped with of circuit structure, the light of optical emitter transmission passes through the light -emitting window reachs lens, the coupling nut passes through first link reaches the second link is realized the reflecting part with the dismantled connection of casing. The utility model discloses a reflecting part and shell be for can dismantle the connection, when setting up circuit structure in the shell and take place to damage, only need lift off the shell to wherein circuit structure keep in repair or change can, saved the flowing back step that photoelectric type liquid level switch changed the in -process, greatly reduced manufacturing cost.
Description
Technical field
This utility model relates to a kind of liquid level emasuring device, especially a kind of photoelectric liquid level switch.
Background technology
Photoelectric liquid level switch is a kind of precise light electrical part for measuring liquid level, photoelectric liquid level switch by
One end is provided with the reflecting part of mirror lens and inside is provided with the shell composition of circuit board.During use, first will
On the sidewall of the testing liquid container that reflecting part is installed through oil tank, liquid nitrogen container so that mirror lens enters
The inner space of testing container is to complete the collection of liquid level signal.
Photoelectric liquid level switch of the prior art, its reflecting part and shell be formed in one structure, and it exists
Following defect: when the circuit board within photoelectric liquid level switch is damaged, it is necessary to first by tested container
Liquid discharge a part so that liquid level is less than after installation site, then unloads photoelectric liquid level switch to complete
Change or maintenance.Otherwise, after unloading photoelectric liquid level switch, the liquid in tested container may pass through
The installing hole ejection of installation site, causes a large amount of wastes of liquid, security incident even occurs.
It is therefore desirable to design a kind of novel photoelectric liquid level switch, it need not discharge in tested container
Liquid, just can be readily achieved the replacing of circuit board.
Utility model content
For reaching above-mentioned purpose, the technical solution of the utility model is as follows:
A kind of photoelectric liquid level switch, it is characterised in that: it includes reflecting part, housing and coupling nut, institute
Stating reflecting part is tubular structure, and it includes that screw terminal and first connects end, and the top of described screw terminal is provided with
Mirror；Described housing includes that optical coupling end and second connects end, and described optical coupling end is provided with light-emitting window and enters light
Mouthful, the inside of described housing is provided with circuit structure, and described circuit structure is provided with optical transmitting set and optical receiver,
The light that described optical transmitting set is launched arrives described lens by described light-emitting window；Described coupling nut passes through institute
State the first connection end and described second to connect end and realize removably connecting of described reflecting part and described housing.
As a preferred embodiment of the present utility model, described housing is provided with cable connection port, described
Circuit structure is connected with external control motor and external power source by described cable connection port.
As a preferred embodiment of the present utility model, described first connection end is provided with and is connected with described
The external screw thread that the screw-internal thread fit of nut uses.
As a preferred embodiment of the present utility model, described second connects end is provided with several projections
Structure, described coupling nut is snapped connection with described housing by described bulge-structure.
As a preferred embodiment of the present utility model, the bottom surface of described lens is the conical surface, and described light is sent out
The light ray parallel that emitter is launched is in the central axis of the conical surface.
As a preferred embodiment of the present utility model, the bottom surface of described lens is hemispherical.
As a preferred embodiment of the present utility model, described lens are one-body molded with described screw terminal.
As a preferred embodiment of the present utility model, described housing is additionally provided with warning piece.
The beneficial effects of the utility model: the reflecting part of photoelectric liquid level switch of the present utility model and shell are
Removably connect, when the circuit structure being arranged in shell is damaged, it is only necessary to unload lower casing to wherein
Circuit structure repair or replace, eliminate in photoelectric liquid level switch Renewal process discharge opeing step
Suddenly, production cost is reduced.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of this utility model embodiment, below will be to required in embodiment
The accompanying drawing wanting practical is briefly described it should be evident that the accompanying drawing in describing below is only that this practicality is new
Some embodiments of type, for those of ordinary skill in the art, in the premise not paying creative work
Under, it is also possible to other accompanying drawing is obtained according to these accompanying drawings.Wherein,
Fig. 1 is this utility model structural representation in one embodiment；
Fig. 2 is the embodiment light path schematic diagram in a liquid of Fig. 1；
Fig. 3 is the embodiment aerial light path schematic diagram of Fig. 1；
Fig. 1 to Fig. 3 includes: reflecting part 100, housing 200, coupling nut 300, screw terminal 101,
First connection end 102, lens 103, optical coupling end 201, second connect end 202, light-emitting window 203, enter light
Mouth 204, cable connection port 205 and bulge-structure 206.
Detailed description of the invention
For make above-mentioned purpose of the present utility model, feature and advantage, can become apparent from understandable, below in conjunction with
This utility model is described in further detail by the drawings and specific embodiments.
Embodiment:
Refer to Fig. 1, the photoelectric liquid level switch in the present embodiment includes reflecting part 100, housing 200 and company
Connect the coupling nut 300 of described reflecting part 100 and described housing 200.
Described reflecting part 100 is tubular structure, and it includes that screw terminal 101 and first connects end 102, described rotation
The top entering end 101 is provided with lens 103, and the described first outer wall connecting end 102 is provided with described coupling nut
The external screw thread (not shown) that the screw-internal thread fit of 300 is practical.During level gauging, by described screw terminal
Described reflecting part 100 is fixedly mounted on the scheduled measurement point on tested container (not shown) sidewall by 101,
Described lens 103 are entered in the inner chamber of tested container.
As a preferred embodiment, in the present embodiment, described lens 103 and described screw terminal 101 one
Molding, it can improve sealing effectiveness of the present utility model, prevent liquid from described lens 103 penetrate by
Xylometer.
Described housing 200 includes that optical coupling end 201 and second connects end 202, and described optical coupling end 201 sets
Light-emitting window 203 and light inlet 204, the inside of described housing 200 is had to be provided with circuit structure (not shown), institute
State circuit structure and be provided with optical transmitting set and optical receiver, the light that described optical transmitting set is launched pass through described in go out
Light mouth 203 arrives described lens 103 and reflects, and reflection light arrives institute by described light inlet 204
State optical receiver.
In the present embodiment, described housing 200 is provided with cable connection port 205, and described circuit structure is by described
Cable connection port 205 connects external control motor and external power source.
In the present embodiment, the female thread that described first connection end 102 is provided with described coupling nut 300 is joined
Closing the external screw thread used, described second connects end 202 is provided with several bulge-structures 206.Described connection spiral shell
Cap 300 connect described reflecting part 100 and described housing 200 specifically comprise the following steps that first pass through described convex
Play structure 206 to be buckled in one end of described coupling nut 300 on described second connection end 202, then will
The other end alignment described first of described coupling nut 300 connects end 102, and screws described coupling nut 300,
So that removably connecting of described reflecting part 100 and described housing 300 can be completed.
Visible, the described reflecting part 100 of photoelectric liquid level switch of the present utility model and described housing 200 energy
Enough realization connects and dismounting easily.During use, if the circuit structure in described housing 200 occurs
Damage, it is only necessary to screw described coupling nut 300, described housing 200 is dismantled from described reflecting part 100
Get off, the housing 200 more renewed, and there is no need to unload described reflecting part 100, thus eliminate light
Electric-type liquid-level switch discharge opeing step before replacing, greatly reduces production cost.
In the present embodiment, the bottom surface of described lens 103 is the conical surface, the light ray parallel that described optical transmitting set is launched
Central axis in the conical surface.In another embodiment, the bottom surface of described lens 103 is hemispherical.
In the present embodiment, the material of described lens 103 is not limited, in concrete application, can be according to quilt
Survey the refractive index of liquid, select the material of lens 103 so that the refractive index of described lens 103 and test solution
The refractive index close of body, to improve measurement effect of the present utility model.
The operation principle of the photoelectric liquid level switch in the present embodiment is as follows:
As in figure 2 it is shown, when liquid level is in time measuring above point, and described lens 103 immerse to liquid, due to
The refractive index of described lens 103 and the refractive index close of liquid, the light major part that described optical transmitting set is launched
Described lens 103 can be penetrated enter in liquid, and the most a small amount of light is through described lens 103 end
Two secondary reflections of portion's conical surface, eventually arrive at optical receiver, the reflection light that the most described optical receiver receives
Luminous power is relatively low.
As it is shown on figure 3, when liquid level drops to measure below point, described lens 103 expose in atmosphere,
Owing to the refractive index of described lens 103 is relatively big with the refractive index of air, the light that described optical transmitting set is launched
Line almost all is reflexed to described optical receiver by described lens 103, and the most described optical receiver receives
The luminous power of reflection light is higher.
Described circuit structure in described shell 200 produces correspondingly sized telecommunications according to the luminous power of reflection light
Number, and by described cable connection port 205 to the signal of telecommunication sent external control motor, external control motor
The liquid level judged in testing container by the signal of telecommunication is positioned at below measurement point or measures above point, and makes and adding
Add liquid or reduce the control action of liquid.
As a preferred embodiment, the described shell 200 of the present embodiment is additionally provided with warning piece, described
Warning piece is connected with described circuit structure, when liquid level drops to measure below point or rise to measure above point
Time, described warning piece sends alarm signal, reminds adding liquid or reduces liquid.
Described warning piece is not defined by the present embodiment, described warning piece can be buzzer siren,
Flashing lamp etc..
Above this utility model has been carried out the most detailed description with certain particularity.In art
Those of ordinary skill it should be understood that what description in embodiment was merely exemplary, without departing from this practicality
Making on the premise of novel true spirit and scope is changed all should belong to protection model of the present utility model
Enclose.This utility model scope required for protection be defined by described claims rather than
Limited by the foregoing description in embodiment.
Claims (8)
1. a photoelectric liquid level switch, it is characterised in that: it includes reflecting part (100), housing (200)
And connect the coupling nut (300) of described reflecting part (100) and described housing (200),
Described reflecting part (100) is tubular structure, and it includes that screw terminal (101) and first connects end (102),
The top of described screw terminal (101) is provided with lens (103)；
Described housing (200) includes that optical coupling end (201) and second connects end (202), described optical coupling
End (201) is provided with light-emitting window (203) and light inlet (204), and the inside of described housing (200) is provided with
Circuit structure, described circuit structure is provided with optical transmitting set and optical receiver, the light that described optical transmitting set is launched
Line arrives described lens (103) by described light-emitting window (203)；
Described coupling nut (300) connects end (102) and described second by described first and connects end (202)
Realize removably connecting of described reflecting part (100) and described housing (200).
2. photoelectric liquid level switch as claimed in claim 1, it is characterised in that: described housing (200)
Being provided with cable connection port (205), described circuit structure is by described cable connection port (205) and outside control
Motor processed and external power source connect.
3. photoelectric liquid level switch as claimed in claim 1, it is characterised in that: described first connects end (102)
It is provided with the external screw thread that the screw-internal thread fit with described coupling nut (300) uses.
4. photoelectric liquid level switch as claimed in claim 1, it is characterised in that: described second connects end (202)
Being provided with several bulge-structures (206), described coupling nut (300) passes through described bulge-structure (206)
Snap connection with described housing (200).
5. photoelectric liquid level switch as claimed in claim 1, it is characterised in that: described lens (103)
Bottom surface be the conical surface, described optical transmitting set launch light ray parallel in the central axis of the conical surface.
6. photoelectric liquid level switch as claimed in claim 1, it is characterised in that: described lens (103)
Bottom surface be hemispherical.
7. photoelectric liquid level switch as claimed in claim 1, it is characterised in that: described lens (103)
One-body molded with described screw terminal (101).
8. the photoelectric liquid level switch as described in any one of claim 1 to 7, it is characterised in that: described shell
Body is additionally provided with warning piece on (200).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620419020.7U CN205647482U (en) | 2016-05-11 | 2016-05-11 | Photoelectric type liquid level switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620419020.7U CN205647482U (en) | 2016-05-11 | 2016-05-11 | Photoelectric type liquid level switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205647482U true CN205647482U (en) | 2016-10-12 |
Family
ID=57058572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620419020.7U Expired - Fee Related CN205647482U (en) | 2016-05-11 | 2016-05-11 | Photoelectric type liquid level switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205647482U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109556677A (en) * | 2018-12-20 | 2019-04-02 | 中国电子科技集团公司第四十八研究所 | A kind of photosensitive sensor with optical protective cover |
| CN114903388A (en) * | 2021-02-09 | 2022-08-16 | 莱克电气股份有限公司 | Cleaning device and liquid level detection method |
-
2016
- 2016-05-11 CN CN201620419020.7U patent/CN205647482U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109556677A (en) * | 2018-12-20 | 2019-04-02 | 中国电子科技集团公司第四十八研究所 | A kind of photosensitive sensor with optical protective cover |
| CN109556677B (en) * | 2018-12-20 | 2020-11-10 | 中国电子科技集团公司第四十八研究所 | Photosensitive sensor with optical protective cover |
| CN114903388A (en) * | 2021-02-09 | 2022-08-16 | 莱克电气股份有限公司 | Cleaning device and liquid level detection method |
| CN114903388B (en) * | 2021-02-09 | 2023-06-23 | 莱克电气股份有限公司 | Cleaning device and liquid level detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161012 Termination date: 20170511 |