CN202002703U - Stain-resistant photoelectric liquid level detection probe - Google Patents
Stain-resistant photoelectric liquid level detection probe Download PDFInfo
- Publication number
- CN202002703U CN202002703U CN2011200283939U CN201120028393U CN202002703U CN 202002703 U CN202002703 U CN 202002703U CN 2011200283939 U CN2011200283939 U CN 2011200283939U CN 201120028393 U CN201120028393 U CN 201120028393U CN 202002703 U CN202002703 U CN 202002703U
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- Prior art keywords
- liquid level
- probe
- liquid
- reflective cavity
- reflection cavity
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The utility model discloses a stain-resistant photoelectric liquid level detection probe, which comprises a probe base (3) and a photosensitive tube (11) and a luminous tube (5) which are arranged in the probe base and are symmetrical mutually, wherein a reflective cavity (9) is arranged in the probe base; light path channels (6) are arranged between the reflective cavity and the photosensitive tube and between the reflective cavity and the luminous tube; an annular gas collecting cavity (12) which is communicated with the outside is formed on the outer side of the reflective cavity; and a water inlet channel (8) which is communicated with a water inlet hole (7) is formed at the lower end of the reflective cavity. In the stain-resistant photoelectric liquid level detection probe, the photoelectric detection technology is integrated by utilizing the reflective characteristic of liquid surfaces on light rays and the pressure equivalence principle is utilized, so that a liquid level of liquid to be detected ascends to the lower part of the reflective cavity and does not ascend any more to realize the non-contact detection of the liquid level; a circuit detection element and a light path element do not contact the detected liquid, so that the detected liquid can be prevented from being polluted; and the probe is made of a corrosion resisting material, and the light path element is made of a hydrophobic material, so that drops of water are prevented from being condensed on the surface of the light path element, and the stability and durability are high.
Description
Technical field
The utility model relates to a kind of liquid-level probe, especially relates to a kind of anti-pollution type photoelectricity Liquid level test probe.
Background technology
Level Detection is common at many controlling fileds branch of putting the palms together before one, and can be divided into float-type, pressure type, condenser type, optical fiber type etc. by principle.But because of different liquids difference is very big, as chemical property; Mobile; Shade; Impurity, air bubble content etc., corrosion resistant, resistant, interference free performance to Level Detection equipment have proposed challenge, to making numerous Level Detection equipment usable range be subjected to very big restriction, or in use for some time because of burn into dirt, reason such as make moist make that control is malfunctioning, misoperation or complete failure.As a kind of Photoelectric Detection probe is arranged at present on the market, it utilizes the photoelectric coupling principle, adopt the prismatic reflection light source, the Utopian prism receiving element that sees through of light receives only a little light flux under the default conditions, when liquid level rising submergence prism, the prismatic reflection ability strengthens, and changes output action thereby make circuit inductance arrive signal.Though its circuit component does not have direct contact liq, perception is stable, and its light path element-prism will touch liquid, and prism surface is very easily contaminated, and the light path reflection potential nonreversibility will take place changes, until malfunctioning, inefficacy.
The utility model content
Problem at Liquid level test probe existence in the above-mentioned prior art, the utility model provides a kind of detecting element not contact with fluid to be measured with light path element, can avoid being polluted by fluid to be measured, and stability and durability height can be realized the anti-pollution type photoelectricity Liquid level test probe of non-full contact Level Detection.
The technical scheme that the technical problems to be solved in the utility model is taked is: described anti-pollution type photoelectricity Liquid level test probe comprises probe socket, is arranged on inner and symmetrical photosensitive tube and the luminotron of probe socket, be provided with reflection cavity in probe socket inside, between reflection cavity and photosensitive tube and luminotron, be equipped with path channels, be provided with and the extraneous annular air collecting chamber that communicates in the reflection cavity outside, be provided with the intake tunnel that communicates with the inlet opening in the reflection cavity lower end.
Principle of work of the present utility model: during state to be detected: the light beam that luminotron sends directly projects the external world by the inlet opening, luminous flux is few in the reflection cavity, photosensitive tube presents high resistance state, detect output and often be set at (or normally closed) state of opening according to circuit, enter probe when the continuous rising of liquid level and from the inlet opening, particularly liquid level is when the reflection cavity lower position, under the liquid level reflex, be projected to photosensitive tube through the light that luminotron sends, photosensitive tube receives big luminous flux and is low resistance state, detect output and switch to closure (or disconnection), for the level control (LC) circuit provides the switching value signal by often opening (or normally closed).
Illustrate: the probe entire body adopts dark light tight corrosion-resistant material, minimum level is reduced in extraneous light interference, luminotron and photosensitive tube and reflection cavity baffle have the path channels of the printing opacity hydrophobic material of a diameter 1.5mm and 3.0mm respectively, and guarantee that reflection cavity is in sealing state except that lower curtate, after rising to reflection cavity with guaranteed water level, even being higher than reflection cavity suddenly, liquid level much can not continue to enter reflection cavity yet, liquid level stabilizing provides stable source reflection liquid level in reflection cavity lower curtate position in the reflection cavity, thereby provide stable light signal, optical detection device entire work process fully with completely cut off by liquid, can not be subjected to any pollution, and the hydrophobic material can guarantee that probe is in that have under the steam ambient also can operate as normal, and because of the inlet opening is located at then wall, even liquid contains steam bubble and also is not easy to enter probe, both just entered most of steam bubble and also can not cause tested liquid fluctuating, thereby guaranteed the stable of output signal from the vent port discharge, more can misoperation.
The utility model utilizes liquid level that the reflection characteristic of light is integrated photoelectric detecting technology, utilize pressure to keep the weighing apparatus principle again, the testing liquid liquid level rises to the reflection cavity bottom with regard to no longer rise (with regard to reflection cavity), realize non-full contact Level Detection, the electric circuit inspection element does not also contact with fluid to be measured with light path element, can avoid being polluted by fluid to be measured, and probe adopts corrosion-resistant material, light path element to adopt the hydrophobic nature material, avoids globule dewfall at light path element surface stability and durability height.
Description of drawings
Fig. 1 is a structural representation of the present utility model,
Fig. 2 is the A-A sectional structure synoptic diagram of Fig. 1.
Threaded hole 2, wire guide 3, probe socket 4, tiltedly circular hole 5, luminotron 6, path channels 7, inlet opening 8, intake tunnel 9, reflection cavity 10, vent port 11, photosensitive tube 12, annular air collecting chamber in the drawings, 1.
Embodiment
In Fig. 1 and Fig. 2, described anti-pollution type photoelectricity Liquid level test probe comprises probe socket 3, photosensitive tube 11 and luminotron 5, described probe socket is for semicircle and adopt corrosion-resistant material to make, processing back two halves circular probe seat is combined into probe integral body with threaded hole 1, be provided with reflection cavity 9 in probe socket bosom position, be symmetrically arranged with two oblique circular holes 4 on reflection cavity top with the reflection cavity center, be fitted with photosensitive tube 11 in the oblique circular hole of on the left side, tiltedly be fitted with luminotron 5 in the circular hole on the right, being provided with an end above oblique circular hole communicates with the external world, the wire guide 2 that the other end communicates with oblique circular hole, lead links to each other with luminotron with photosensitive tube respectively by wire guide, between reflection cavity and photosensitive tube and luminotron, be equipped with path channels 6, path channels between luminotron and the reflection cavity is diameter 1.5mm, path channels between photosensitive tube and the reflection cavity is 3.0mm, described path channels is made with printing opacity hydrophobic material, be provided with and the extraneous annular air collecting chamber 12 that communicates in the reflection cavity outside, be provided with the intake tunnel 8 that communicates with inlet opening 7 in the reflection cavity lower end, described inlet opening is positioned at probe socket lower end one side, described intake tunnel 8 is that two transversal section are arc surface and the slick and sly skewed cavity of forming that is that links, the intake tunnel upper end links to each other with annular air collecting chamber with reflection cavity, the intake tunnel lower end is connected with the inlet opening, and probe socket is provided with two symmetrically arranged vent ports 10 that are connected with annular air collecting chamber.
Claims (2)
1. anti-pollution type photoelectricity Liquid level test probe, it comprises probe socket (3), is arranged on inner and symmetrical photosensitive tube (11) and the luminotron (5) of probe socket, be provided with reflection cavity (9) in probe socket inside, it is characterized in that: between reflection cavity and photosensitive tube and luminotron, be equipped with path channels (6), be provided with and the extraneous annular air collecting chamber (12) that communicates in the reflection cavity outside, be provided with the intake tunnel (8) that communicates with inlet opening (7) in the reflection cavity lower end.
2. anti-pollution type photoelectricity Liquid level test probe according to claim 1 is characterized in that: described path channels (6) is made with printing opacity hydrophobic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200283939U CN202002703U (en) | 2011-01-28 | 2011-01-28 | Stain-resistant photoelectric liquid level detection probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200283939U CN202002703U (en) | 2011-01-28 | 2011-01-28 | Stain-resistant photoelectric liquid level detection probe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202002703U true CN202002703U (en) | 2011-10-05 |
Family
ID=44705440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200283939U Expired - Fee Related CN202002703U (en) | 2011-01-28 | 2011-01-28 | Stain-resistant photoelectric liquid level detection probe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202002703U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113932882A (en) * | 2021-09-16 | 2022-01-14 | 深圳市奥图威尔科技有限公司 | High-precision photoelectric liquid level sensor |
-
2011
- 2011-01-28 CN CN2011200283939U patent/CN202002703U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113932882A (en) * | 2021-09-16 | 2022-01-14 | 深圳市奥图威尔科技有限公司 | High-precision photoelectric liquid level sensor |
| CN113932882B (en) * | 2021-09-16 | 2023-07-28 | 深圳市奥图威尔科技有限公司 | High-precision photoelectric liquid level sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111005 Termination date: 20120128 |