CN207661821U - A kind of flame detecting device based on photodiode - Google Patents
A kind of flame detecting device based on photodiode Download PDFInfo
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- CN207661821U CN207661821U CN201721827786.XU CN201721827786U CN207661821U CN 207661821 U CN207661821 U CN 207661821U CN 201721827786 U CN201721827786 U CN 201721827786U CN 207661821 U CN207661821 U CN 207661821U
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- photodiode
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- dust cover
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Abstract
The utility model is related to a kind of flame detecting devices based on photodiode, main body includes fire defector head, data collecting card, calculation processing mechanism, in fire defector head containing implosion guard dust cover, can be by divergent beams refractive transition at the plano-convex shape collimation lens of collimated light beam, aspherical biconvex condenser lens, photodiode and the metal shell of the focal beam spot that collimated light beam focusing transform can be consistent at the optical receiver point size with photodiode.Due to being relatively large in diameter for shell, the light beam of light source of formation is also larger, the ultraviolet anti-reflection film for having to ultraviolet light wave band and passing through very much rate by force is coated on plano-convex shape collimation lens and aspherical biconvex condenser lens surface, dust cover can ensure that light beam interference-free in housing chamber penetrates propagation, the hot spot generated is focused with photodiode to be consistent by spot definition size, therefore can ensure that making full use of for beam energy, be conducive to improve the sensitivity of detection flame, the job stability of detection device and reliably working service life.
Description
Technical field
The utility model is related to data automatic measurement technique fields, especially a kind of to be supervised automatically suitable for Combustion Operation of Boilers
Examine the flame detecting device based on photodiode of system.
Background technology
When boiler combustion is unstable or misoperation, part or all of coal burner can be caused to extinguish, in this situation
If lower continue to provide coal dust to burner, deflagration phenomenon can be caused because of accumulation of the coal dust in burner hearth, this can not only be dropped
Low boiler thermal efficiency aggravates environmental pollution, but also can seriously threaten the operational safety and service life of boiler furnace equipment.For
This, it is necessary to effective supervision is carried out to the flame in burner hearth, to ensure the normal operation of boiler and prevent Boiler combustion existing
The generation of elephant.In currently a popular flame detector, it is more effective and it is most popular be using optical fiber as leading
Optical element, with probe receive flame send out radiation, using radiation luminous energy principle ultraviolet light flame detector, its advantage is that knot
Structure is simple, warning sensitivity is high, the disadvantage is that：1, detection range farther out, boiler be in underrun when flame it is more micro-
Weak state or flame combustion cause uitraviolet intensity weaker when being not enough in the case of when, it is difficult to accurately identify whether
There is flame, easy tos produce the trigger signal of mistake, the alarm relay of detector is caused to malfunction, influence job stability
And reliability；2, since ultraviolet radiation energy is easy meeting by mist of oil, water vapour, coal dust and the combustion by-product in working environment
Deng absorption, cause to reduce working sensitivity；3, due to using optical fiber as optical communication means, and the toughness of optical fiber it is poor,
And non-refractory can seriously affect the normal work of light beam, eventually lead to shadow especially when fiber end face has pollution condition
Ring the job stability and security reliability of burner hearth safety monitoring system.So considering from practicability and economy point, owe
It is ideal.
Invention content
The purpose of this utility model is to overcome the shortcomings of present in existing ultraviolet light flame detector, provides one kind and is convenient for
Directly the ultraviolet portion in flame combustion is refracted on light-sensitive element, the work for being conducive to improve flame detector is sensitive
Degree, stability and the flame detecting device based on photodiode that can ensure that burner hearth safety monitoring system functional reliability.
The flame detecting device main body based on photodiode of the utility model includes fire defector head, data acquisition
Card, calculation processing mechanism and system working power are characterized in that the fire defector head includes dust cover, plano-convex shape collimation
Lens, aspherical biconvex condenser lens, light-sensitive element, shell and cable link, wherein：The dust cover have prevent week
Collarette border dust enters the endoceliac function of shell, is filled the post of by implosion guard plate；The plano-convex shape collimation lens has and will adopt
The divergent beams refractive transition collected at collimated light beam function, by being coated with the outer of ultraviolet anti-reflection film on flattened cylindrical A and surface
Convex arcwall face A is constituted；The aspherical biconvex condenser lens have by collimated light beam convergence, focusing transform at photoelectricity two
The function for the hot spot that pole pipe is consistent by spot definition, by flattened medial cylinder B and positioned at the both ends flattened medial cylinder B, surface
On be coated with the outer gibbosity arcwall face B of ultraviolet anti-reflection film and constitute；The light-sensitive element is filled the post of by photodiode；The shell
By being relatively large in diameter, the outer diameter of its internal diameter and the dust cover, plano-convex shape collimation lens, aspherical biconvex condenser lens assemble phase
The metal tube of symbol is filled the post of.
In the assembled condition, the dust cover is arranged by the limit of cover ring, fixed installation on the top end part of shell, described
Plano-convex shape collimation lens, aspherical biconvex condenser lens, light-sensitive element, fixed limit is arranged in housing chamber successively.
When work, the fire defector head is fixed at by the side of burner, and the top of shell is directed at burner
Flame, the divergent shape light beam from flame penetrate dust cover after be radiated on the end faces flattened cylindrical A of plano-convex shape collimation lens,
Then through the outer gibbosity arcwall face A refractive transitions at collimated light beam；It is aspherical described in being radiated at after this collimated light beam
Convergence shape light beam is generated on one outer gibbosity arcwall face B of biconvex condenser lens, after refraction, then is transmitted and passed through the centre
It is generated with photodiode by spot definition size phase by another outer gibbosity arcwall face B refractions, focusing after flattened cylindrical B
The focal beam spot of symbol is transmitted to data collecting card after photodiode is converted into electric signal by cable link, is converted into counting
Calculation processing mechanism is transmitted to after word signal again and divides folding processing, to the instant detection information for showing flame, since plano-convex shape collimates
Being coated on the outer gibbosity arcwall face of lens and aspherical biconvex condenser lens has very by force across the ultraviolet of rate ultraviolet light wave band
Anti-reflection film, dust cover can ensure that light beam interference-free in housing chamber penetrates propagation, focus the hot spot and photodiode of generation
Be consistent by spot definition size, therefore making full use of for beam energy is can ensure that, it is advantageously ensured that the sensitivity of detection flame, inspection
Survey job stability and the reliably working service life of device.
Flame detecting device of the utility model based on above-mentioned design based on photodiode, due to shell diameter compared with
Greatly, thus daylighting area it is also larger, to be formed light beam of light source is also larger, energy is more sufficient；And due to solid in housing tip portion
Surely it is provided with dust cover, interference energy attenuation occurs for the light beam that can really avoid enter into housing chamber；Due also to being collimated with plano-convex shape
Lens add aspherical biconvex condenser lens as and with daylighting, processing and transmit light beam, can replace traditional fiber function
Component, not only overcome present in conventional flame detectors by fibre ribbon Lai influence job stability and reliability not
Foot, but also bringing can make the original divergent beams of entrance be first converted into collimated light beam, again through aspherical biconvex condenser lens
The processing for first restraining refocusing, finally accumulates the focal beam spot that can be consistent with the optical receiver point size of photodiode, can
Ensure that light beam without hindrance pass through in transmittance process in Can body cavity will not cause luminous energy to be lost, is conducive to the profit for improving light beam
With rate, the positive technique effect of higher fire defector sensitivity and reliable and stable work is ensured, in addition, due also to using light
Electric diode fills the post of traditional light-sensitive element, is conducive to simplify circuit structure, improves functional reliability.So the utility model
Technical solution effectively overcome many deficiencies present in traditional flame detection device, bring the operation is stable, reliable and spirit
The high advantage of sensitivity is a big innovation of traditional flame detection device, before having very strong practicability and the application of valuable market
Scape.
Description of the drawings
Fig. 1 is the basic structure schematic diagram of the utility model embodiment；
Fig. 2 is the structural schematic diagram of the utility model embodiment Flame detector；
Fig. 3 is the structure and operating diagram of plano-convex shape collimation lens in the utility model embodiment；
Fig. 4 is the structure and operating diagram of aspherical biconvex condenser lens in the utility model embodiment；
Fig. 5 is the application state schematic diagram of the utility model embodiment.
In figure：
1. 11. dust cover of fire defector head, 12. plano-convex shape collimation lens, 121. flattened cylindrical A
122. 13. aspherical biconvex condenser lenses of outer gibbosity arcwall face A, 131. flattened cylindrical B
132. 15. shell of outer gibbosity arcwall face 14. light-sensitive elements of B, 16. cable link
2. 3. calculation processing mechanism of data collecting card, 4. system working power, 5. burner.
Specific implementation mode
The utility model is described in further detail with exemplary embodiments below in conjunction with the accompanying drawings.
In Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the flame detecting device main body based on photodiode of the utility model includes
There are fire defector head 1, data collecting card 2, calculation processing mechanism 3 and system working power 4, is characterized in that the fire defector
First 1 includes dust cover 11, plano-convex shape collimation lens 12, aspherical biconvex condenser lens 13, light-sensitive element 14, shell 15 and electricity
Cable connecting line 16, wherein：The dust cover 11, which has, prevents ambient enviroment dust from entering the endoceliac function of shell, by explosion-proof
Glass plate is filled the post of；The plano-convex shape collimation lens 12 has collected divergent beams refractive transition into the work(of collimated light beam
Can, the outer gibbosity arcwall face A122 by being coated with ultraviolet anti-reflection film on flattened cylindrical A121 and surface is constituted；Described is aspherical double
Convex condenser lens 13 have by collimated light beam convergence, focusing transform at the hot spot that is consistent by spot definition with photodiode work(
Can, the evagination of ultraviolet anti-reflection film is coated with by flattened medial cylinder B 131 and on 131 both ends flattened medial cylinder B, surface
Shape arcwall face B132 is constituted；The light-sensitive element 14 is filled the post of by photodiode；The shell 15 is by being relatively large in diameter, in it
Diameter assembles the metal being consistent with the outer diameter of the dust cover 11, plano-convex shape collimation lens 12, aspherical biconvex condenser lens 13
Pipe is filled the post of.
In the assembled condition, the dust cover 11 is arranged by the limit of cover ring, fixed installation on the top end part of shell 15,
The plano-convex shape collimation lens 12, aspherical biconvex condenser lens 13, light-sensitive element 14, fixed limit is arranged in metal successively
15 intracavitary of tube shell.
In Fig. 1 and Fig. 5, when work, the fire defector head 1 is fixed at by the side of burner 5, metal tube
The flame of the top alignment burner 5 of shell 15, the divergent shape light beam from flame are radiated at plano-convex shape after penetrating dust cover 11
On 121 end faces flattened cylindrical A of collimation lens 12, then through 122 refractive transitions of outer gibbosity arcwall face A at directional light
Beam；It is radiated at after this collimated light beam on an outer gibbosity arcwall face B 132 of the aspherical biconvex condenser lens 13, warp
Convergence shape light beam is generated after refraction, then is transmitted and passed through after the flattened medial cylinder B 131 by another outer gibbosity arcwall face B
132 refractions focus generation and the focal beam spot of photodiode being consistent by spot definition size, are converted into through photodiode
Data collecting card 2 is transmitted to by cable link 16 after electric signal, is converted into being transmitted to calculation processing mechanism 3 after digital signal again
Divide folding processing, to the instant detection information for showing flame, due to plano-convex shape collimation lens 12 and aspherical biconvex condenser lens 13
Outer gibbosity arcwall face on be coated with the ultraviolet anti-reflection film for having to ultraviolet light wave band and passing through very much rate by force, dust cover 11 can ensure that light beam
Interference-free penetrates in housing chamber, and the hot spot for focusing generation is consistent with photodiode by spot definition size, therefore can be really
Making full use of for beam energy is protected, it is advantageously ensured that the sensitivity of detection flame, the job stability of detection device and reliable work
Make the service life.
Claims (1)
1. a kind of flame detecting device based on photodiode, main body includes fire defector head（1）, data collecting card（2）、
Calculation processing mechanism（3）With system working power（4）, it is characterised in that the fire defector head（1）It include dust cover
（11）, plano-convex shape collimation lens（12）, aspherical biconvex condenser lens（13）, light-sensitive element（14）, shell（15）And cable connects
Wiring（16）, wherein：
The dust cover（11）Filled the post of by implosion guard plate；
The plano-convex shape collimation lens（12）By flattened cylindrical A（121）With the outer gibbosity arc for being coated with ultraviolet anti-reflection film on surface
Shape face A（122）It constitutes；
The aspherical biconvex condenser lens（13）By flattened medial cylinder B（131）With positioned at flattened medial cylinder B（131）
The outer gibbosity arcwall face B of ultraviolet anti-reflection film is coated on both ends, surface（132）It constitutes；
The light-sensitive element（14）Filled the post of by photodiode；
The shell（15）By being relatively large in diameter, its internal diameter and the dust cover（11）, plano-convex shape collimation lens（12）, aspheric
Face biconvex condenser lens（13）The metal tube that is consistent of outer diameter assembly fill the post of；
In the assembled condition, the dust cover（11）By the limit of cover ring, setting is fixedly mounted in shell（15）Top end part on,
The plano-convex shape collimation lens（12）, aspherical biconvex condenser lens（13）, light-sensitive element（14）, fixed limit setting successively
In metal tube shell（15）Intracavitary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721827786.XU CN207661821U (en) | 2017-12-25 | 2017-12-25 | A kind of flame detecting device based on photodiode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721827786.XU CN207661821U (en) | 2017-12-25 | 2017-12-25 | A kind of flame detecting device based on photodiode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207661821U true CN207661821U (en) | 2018-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721827786.XU Active CN207661821U (en) | 2017-12-25 | 2017-12-25 | A kind of flame detecting device based on photodiode |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107940500A (en) * | 2017-12-25 | 2018-04-20 | 苏州汉策能源设备有限公司 | A kind of flame detecting device based on photodiode |
| CN111751485A (en) * | 2020-06-18 | 2020-10-09 | 上海交通大学 | Device, array and system for measuring flame propagation position and speed in large space |
-
2017
- 2017-12-25 CN CN201721827786.XU patent/CN207661821U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107940500A (en) * | 2017-12-25 | 2018-04-20 | 苏州汉策能源设备有限公司 | A kind of flame detecting device based on photodiode |
| CN111751485A (en) * | 2020-06-18 | 2020-10-09 | 上海交通大学 | Device, array and system for measuring flame propagation position and speed in large space |
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