CN213933578U - Integrated explosion-proof ultraviolet flame detector - Google Patents
Integrated explosion-proof ultraviolet flame detector Download PDFInfo
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- CN213933578U CN213933578U CN202023338767.5U CN202023338767U CN213933578U CN 213933578 U CN213933578 U CN 213933578U CN 202023338767 U CN202023338767 U CN 202023338767U CN 213933578 U CN213933578 U CN 213933578U
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Abstract
The utility model discloses an integrated explosion-proof ultraviolet flame detector, which comprises an explosion-proof shell and a flame detection component; the explosion-proof casing is including the protecgulum, an explosion-proof section of thick bamboo and the back lid that connect gradually, flame detection subassembly includes flame signal detection circuit board and the control circuit board who is connected with flame signal detection circuit board, and the integration has signal processing circuit and is used for detecting the ultraviolet radiation pipe of flame on the flame signal detection circuit board, be provided with on the protecgulum with ultraviolet radiation pipe complex quartz glass sight glass, open with quartz glass sight glass complex position on the protecgulum has the through-hole, the last integration of control circuit board have microcontroller and with charactron and the button that microcontroller connects. The utility model discloses simple structure sensitivity is high, can be waterproof, dustproof, have the flame proof characteristic, detects flame spectral range 185nm ~ 260nm, effectively avoids the interference of sunlight, visible light, and the accuracy and the reliability of detecting flame are high to can use in very abominable operating mode environment.
Description
Technical Field
The utility model belongs to the technical field of the flame detects, concretely relates to explosion-proof type ultraviolet flame detector of integration.
Background
The flame detector is an indispensable component in the industries of fire, security protection, industrial burners, combustion furnaces, torches and the like, plays a very critical role, and is an important part of the functions of combustion monitoring and safety protection.
There are many problems with the flame detectors currently on the market as follows: some flame detectors adopt a photoresistor, if a hearth is flamed out accidentally, because the temperature of a furnace wall is high and the intensity of light is high, the photoresistor type flame detectors also consider that fire exists, and great potential safety hazards are caused; some instruments adopt a split structure, and a probe transmits signals to an instrument box through a data line, so that signal interference is easy to occur due to the complex environment of field industrial equipment, and data confusion and false alarm are caused; some products do not adopt an explosion-proof shell, so that the adaptability to the field environment is poor; some products cannot output 4-20 mA analog quantity signals, and the flame size cannot be accurately monitored on site; some products can not calibrate 4-20 mA analog quantity signals, and the flame size can not be accurately determined on site.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that not enough among the above-mentioned prior art is directed at, provide an integration explosion-proof type ultraviolet flame detector, its simple structure, sensitivity is high, can be waterproof, dustproof, have the integration ultraviolet flame detector of flame proof characteristic, detect flame spectral range 185nm ~ 260nm, effectively avoid the interference of sunlight, visible light, detect flame's accuracy and reliability height to can use in very abominable operating mode environment.
In order to solve the technical problem, the utility model discloses a technical scheme is: an integration explosion-proof type ultraviolet flame detector which characterized in that: the flame detection device comprises an explosion-proof shell and a flame detection assembly arranged in the explosion-proof shell; explosion-proof casing is including the protecgulum, an explosion-proof section of thick bamboo and the hou gai that connect gradually, flame detection subassembly includes by preceding to the back flame signal detection circuit board that sets up in explosion-proof section of thick bamboo and the control circuit board of being connected with flame signal detection circuit board, the last integration of flame signal detection circuit board has signal processing circuit and is used for detecting the ultraviolet radiation pipe of flame, be provided with on the protecgulum with ultraviolet radiation pipe complex quartz glass sight glass, open with quartz glass sight glass complex position on the protecgulum has the through-hole, on the control circuit board integration have microcontroller and with charactron and button that microcontroller connects are covered after and are provided with the window that is used for observing the charactron.
The integrated explosion-proof ultraviolet flame detector is characterized in that: the signal processing circuit comprises a pulse width modulation chip U1 with the model number of UC3842 and a 555 timer U2 packaged by DIP-4, wherein a 1 st pin of the pulse width modulation chip U1 is connected with a 2 nd pin of the pulse width modulation chip U1 through a resistor R3 and a capacitor C2 which are connected in parallel, the 2 nd pin of the pulse width modulation chip U1 is divided into two paths, one path is connected with a +24V power supply through a resistor R1, the other path is grounded through a resistor R2, an 8 th pin of the pulse width modulation chip U1 is divided into two paths, one path is grounded through a capacitor C3, the other path is grounded through a resistor R4 and a capacitor C4 in sequence, and a 4 th pin of the pulse width modulation chip U1 is connected with the connecting end of the resistor R4 and the capacitor C4; a first pin 6 of the pulse width modulation chip U1 is connected with a gate of the field effect transistor Q1 through a resistor R5, a second pin 3 of the pulse width modulation chip U1 is divided into three paths, one path is grounded through a capacitor C5, the second path is grounded through a resistor R7 and a resistor R8 in sequence, the third path is grounded through a resistor R6 and a resistor R9 in sequence, a source of the field effect transistor Q1 is connected with a connecting end of a resistor R7 and a resistor R8, a drain of the field effect transistor Q1 is connected with a +24V power supply through a primary coil of a transformer T1, one end of a secondary coil of the transformer T1 is grounded, the other end is connected with a connecting end of the resistor R1 and the resistor R1 in sequence, a connecting end of the diode D1 and the resistor R1 is connected with a connecting end of the resistor R1 and the resistor R1, the second path is grounded through the resistor R1 and the capacitor C1 in sequence, a connecting end of the resistor R1 and the anode of the diode D1 are connected with the diode 1 and the cathode of the ultraviolet radiation tube in sequence. The connecting end of the ultraviolet radiation tube and the diode D2 is divided into three paths, one path is grounded through a resistor R13 and a capacitor C8 which are connected in parallel, the second path is connected with a 2 nd pin of a 555 timer U2, the third path is connected with a 6 th pin of the 555 timer U2, a 5 th pin of the 555 timer U2 is divided into two paths, one path is connected with a +24V power supply through a resistor R14, the other path is grounded through a resistor R15, and a 3 rd pin of the 555 timer U2 is an output end of the flame signal detection circuit board.
The integrated explosion-proof ultraviolet flame detector is characterized in that: the turn ratio of the transformer T1 is 6: 125.
The integrated explosion-proof ultraviolet flame detector is characterized in that: the output end and the button of the flame signal detection circuit board are connected with the input end of the microcontroller, and the nixie tube is connected with the output end of the microcontroller.
The integrated explosion-proof ultraviolet flame detector is characterized in that: the ultraviolet radiation tube is an R2868 ultraviolet radiation tube.
The integrated explosion-proof ultraviolet flame detector is characterized in that: the aperture of the through hole is gradually reduced from the outer side of the front cover to the inner side of the front cover.
Compared with the prior art, the utility model has the following advantage:
1. the utility model discloses use ultraviolet radiation pipe as the probe that flame detected, detect the ultraviolet ray that contains in the flame, compare indirect detection mode such as smog detection and heat detection, possess high sensitivity, the high-speed responsiveness that compares incomparably, detect the accuracy height, excellent in use effect.
2. The utility model discloses a set up control circuit board and handle the data that flame signal detection circuit board detected and show through the charactron, make this instrument can the exclusive use, need not to follow the record data on the host computer, make testing result more directly perceived, human-computer interaction is friendly more smoothly.
To sum up, the utility model discloses simple structure, sensitivity is high, can be waterproof, dustproof, have the integration ultraviolet flame detector of flame proof characteristic, detects flame spectral range 185nm ~ 260nm, effectively avoids the interference of sunlight, visible light, and the accuracy and the reliability of detecting flame are high to can use in very abominable operating mode environment.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic circuit diagram of the signal processing circuit of the present invention.
Description of reference numerals:
1-rear cover; 2-an explosion-proof cylinder; 3-ultraviolet radiation tube;
4-a through hole; 5-front cover; 6-quartz glass sight glass;
7-flame signal detection circuit board; 8-a control circuit board;
9-nixie tube; 10-a button; 11-view window.
Detailed Description
As shown in fig. 1, the utility model comprises an explosion-proof shell and a flame detection assembly arranged in the explosion-proof shell; explosion-proof casing is including the protecgulum 5, the explosion-proof section of thick bamboo 2 and the hou gai 1 that connect gradually, flame detection subassembly includes by preceding to the back flame signal detection circuitry 7 that sets up in explosion-proof section of thick bamboo 2 and the control circuit board 8 of being connected with flame signal detection circuitry 7, the integrated ultraviolet radiation pipe 3 that has signal processing circuit and is used for detecting flame on the flame signal detection circuitry 7, be provided with on the protecgulum 5 with the 3 complex quartz glass sight glass 6 of ultraviolet radiation pipe, open with the 6 complex positions of quartz glass sight glass on the protecgulum 5 has through-hole 4, control circuit board 8 go up the integration have microcontroller and with charactron 9 and button 10 that microcontroller connects are provided with the window 11 that is used for observing charactron 9 on the hou gai 1.
In this embodiment, the front cover 5 and the explosion-proof cylinder 2 and the rear cover 1 and the explosion-proof cylinder 2 are both connected by threads, and the positions where the front cover 5, the explosion-proof cylinder 2 and the rear cover 1 are connected with each other are all provided with sealing rings.
In this embodiment, the quartz glass sight glass 6 is a flat quartz glass sight glass.
It should be noted that the utility model discloses high, the integrated ultraviolet flame detector that can waterproof, dustproof, have the flame proof characteristic of sensitivity detects flame spectral range 185nm ~ 260nm, effectively avoids the interference of sunlight, visible light, and the accuracy and the reliability of detecting flame are high to can use in very abominable operating mode environment;
the ultraviolet radiation tube 3 is used as a probe for flame detection to detect ultraviolet rays in flame, and compared with indirect detection modes such as smoke detection, heat detection and the like, the ultraviolet radiation tube has the advantages of unrivaled high sensitivity, high-speed responsiveness, high detection accuracy and good use effect;
data detected by the flame signal detection circuit board 7 are processed by the control circuit board 8 and displayed through the nixie tube 9, so that the flame signal detection circuit board can be used independently, data are not required to be recorded from an upper computer, a detection result is more visual, and human-computer interaction is more friendly and smooth.
As shown in fig. 2, in this embodiment, the signal processing circuit includes a pulse width modulation chip U1 with a model of UC3842 and a 555 timer U2 packaged in DIP-4, a 1 st pin of the pulse width modulation chip U1 is connected to a 2 nd pin of the pulse width modulation chip U1 through a resistor R3 and a capacitor C2 connected in parallel, the 2 nd pin of the pulse width modulation chip U1 is divided into two paths, one path is connected to a +24V power supply through a resistor R1, the other path is grounded through a resistor R2, an 8 th pin of the pulse width modulation chip U1 is divided into two paths, one path is grounded through a capacitor C3, the other path is grounded through a resistor R4 and a capacitor C4 in sequence, and a 4 th pin of the pulse width modulation chip U1 is connected to a connection end of the resistor R4 and the capacitor C4; a first pin 6 of the pulse width modulation chip U1 is connected with a gate of the field effect transistor Q1 through a resistor R5, a second pin 3 of the pulse width modulation chip U1 is divided into three paths, one path is grounded through a capacitor C5, the second path is grounded through a resistor R7 and a resistor R8 in sequence, the third path is grounded through a resistor R6 and a resistor R9 in sequence, a source of the field effect transistor Q1 is connected with a connecting end of a resistor R7 and a resistor R8, a drain of the field effect transistor Q1 is connected with a +24V power supply through a primary coil of a transformer T1, one end of a secondary coil of the transformer T1 is grounded, the other end is connected with a connecting end of the resistor R1 and the resistor R1 in sequence, a connecting end of the diode D1 and the resistor R1 is connected with a connecting end of the resistor R1 and the resistor R1, the second path is grounded through the resistor R1 and the capacitor C1 in sequence, a connecting end of the resistor R1 and the anode of the diode D1 and the diode 1 are connected with the anode of the diode 1 through the diode R1 and the ultraviolet radiation tube 3 in sequence. The connecting end of the ultraviolet radiation tube 3 and the diode D2 is divided into three paths, one path is grounded through a resistor R13 and a capacitor C8 which are connected in parallel, the second path is connected with the 2 nd pin of a 555 timer U2, the third path is connected with the 6 th pin of the 555 timer U2, the 5 th pin of the 555 timer U2 is divided into two paths, one path is connected with a +24V power supply through a resistor R14, the other path is grounded through a resistor R15, and the 3 rd pin of the 555 timer U2 is the output end of the flame signal detection circuit board 7.
It should be noted that, the pulse width modulation chip U1 and its surrounding components are combined to form a boost circuit, the 6 th pin of the pulse width modulation chip U1 outputs a high frequency pulse signal to control the on and off of the field effect transistor Q1, the on and off of the field effect transistor Q1 make the secondary coil of the transformer T1 generate high voltage, and the diode D1 charges the capacitor C6, thereby completing the conversion of low voltage and high voltage;
the resistance value of the resistor R8 is 1 omega, when the current on the resistor R8 exceeds 1A, the 3 rd pin of the pulse width modulation chip U1 receives the signal, the 6 th pin of the pulse width modulation chip U1 stops outputting the high-frequency pulse signal so as to protect the safety of the field effect transistor Q1, and the field effect transistor Q1 is an NMOS (N-channel metal oxide semiconductor) transistor;
when the ultraviolet radiation tube 3 is triggered to be conducted under the excitation of flame ultraviolet rays, the capacitor C7 discharges to the capacitor C8 through the R12 resistor and the ultraviolet radiation tube 3, then the capacitor C3526 discharges the capacitor C13 resistor, a pulse peak waveform is formed at the output end, after the capacitor C7 discharges, the 400V voltage charges the capacitor C7 through the resistor R11 again, the capacitor C7 discharges again, a discharge waveform with a certain frequency is formed repeatedly in a reciprocating mode, and the diode D2 plays a role in limiting the peak pulse voltage to avoid other circuits from being damaged due to high voltage.
The waveform shaping circuit is composed of a 555 timer U2 and accessory components, and divides the spike pulse into high and low level pulse signals according to the voltage of the 5 th pin of the 555 timer U2 so as to transmit the pulse signals to the control circuit board 8 for subsequent data processing.
In this embodiment, the turns ratio of the transformer T1 is 6:125, so as to realize the conversion from 24V to 400V.
In this embodiment, the output end of the flame signal detection circuit board 7 and the button 10 are both connected with the input end of the microcontroller, and the nixie tube 9 is connected with the output end of the microcontroller.
In this embodiment, microcontroller chooses STM32 series's singlechip for use, and charactron 9 is used for showing the flame parameter that detects, and button 10 is used for setting up each item initial value, and it is when needs set up the initial value, opens back lid 1 and sets up through button 10, closes back lid 1 after finishing setting up and carries out follow-up use.
In this embodiment, the ultraviolet radiation tube 3 is an ultraviolet radiation tube with a model number of R2868.
In this example, an ultraviolet radiation tube of type R2868 manufactured by Kokutoshina photonics corporation was used as a device for receiving ultraviolet rays in a flame, and the device was characterized in that the wavelength range of sensitivity was very narrow, and was only 185 to 260nm, and was insensitive to visible light and was not reactive to ultraviolet rays of sunlight.
In this embodiment, the aperture of the through hole 4 is gradually reduced from the outer side of the front cover 5 to the inner side of the front cover 5, so that more ultraviolet rays in the flame can be collected and concentrated to the central position of the quartz glass sight glass 6, and the detection of the ultraviolet radiation tube 3 is more sensitive.
The utility model discloses when using, it switches on to receive under the excitation of flame ultraviolet ray when ultraviolet radiation pipe 3, electric capacity C7 discharges to electric capacity C8 through R12 resistance and ultraviolet radiation pipe 3 on, then can be put by R13 resistance, form a pulse spike waveform at the output, electric capacity C7 discharges after finishing, 400V's voltage can be again through resistance R11 for electric capacity C7 charges, electric capacity C7 can discharge once more, come and go the repeated discharge waveform that forms certain frequency, the pulse signal who becomes high low level through subsequent processing again so that carry and do subsequent data processing for control circuit board 8, microcontroller shows the testing data after will handling through charactron 9, need not to follow the host computer and go up the recorded data, make the testing result more directly perceived.
The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and the equivalent structure change of doing above embodiment the utility model discloses technical scheme's within the scope of protection.
Claims (6)
1. An integration explosion-proof type ultraviolet flame detector which characterized in that: the flame detection device comprises an explosion-proof shell and a flame detection assembly arranged in the explosion-proof shell; the explosion-proof shell comprises a front cover (5), an explosion-proof cylinder (2) and a rear cover (1) which are connected in sequence, the flame detection assembly comprises a flame signal detection circuit board (7) arranged in the explosion-proof cylinder (2) from front to back and a control circuit board (8) connected with the flame signal detection circuit board (7), flame signal detection circuit board (7) is gone up the integration and is had signal processing circuit and ultraviolet radiation pipe (3) that are used for detecting flame, be provided with on protecgulum (5) with ultraviolet radiation pipe (3) complex quartz glass sight glass (6), open on protecgulum (5) with quartz glass sight glass (6) complex position has through-hole (4), control circuit board (8) go up the integration have microcontroller and with charactron (9) and button (10) that microcontroller connects are provided with window (11) that are used for observing charactron (9) on rear cover (1).
2. An integrated explosion proof ultraviolet flame detector as set forth in claim 1, wherein: the signal processing circuit comprises a pulse width modulation chip U1 with the model number of UC3842 and a 555 timer U2 packaged by DIP-4, wherein a 1 st pin of the pulse width modulation chip U1 is connected with a 2 nd pin of the pulse width modulation chip U1 through a resistor R3 and a capacitor C2 which are connected in parallel, the 2 nd pin of the pulse width modulation chip U1 is divided into two paths, one path is connected with a +24V power supply through a resistor R1, the other path is grounded through a resistor R2, an 8 th pin of the pulse width modulation chip U1 is divided into two paths, one path is grounded through a capacitor C3, the other path is grounded through a resistor R4 and a capacitor C4 in sequence, and a 4 th pin of the pulse width modulation chip U1 is connected with the connecting end of the resistor R4 and the capacitor C4; the 6 th pin of the pulse width modulation chip U1 is connected with the grid of the field effect transistor Q1 through a resistor R5, the 3 rd pin of the pulse width modulation chip U1 is divided into three paths, one path is grounded through a capacitor C5, the second path is grounded through a resistor R7 and a resistor R8 in sequence, the third path is grounded through a resistor R6 and a resistor R9 in sequence, the source of the field effect transistor Q1 is connected with the connecting end of a resistor R7 and a resistor R8, the drain of the field effect transistor Q1 is connected with a +24V power supply through the primary coil of a transformer T1, one end of the secondary coil of the transformer T1 is grounded, the other end is connected with the connecting end of the resistor R1 and the resistor R1 in sequence through a diode D1 and the resistor R1, the connecting end of the diode D1 and the resistor R1 is grounded through a capacitor C1, the second path is grounded through a resistor R1 and a capacitor C1 and a diode D1, the connecting end of the diode R1 and the cathode of the ultraviolet radiation tube (, the connection end of the ultraviolet radiation tube (3) and the diode D2 is divided into three paths, one path is grounded through a resistor R13 and a capacitor C8 which are connected in parallel, the second path is connected with a 2 nd pin of a 555 timer U2, the third path is connected with a 6 th pin of the 555 timer U2, a 5 th pin of the 555 timer U2 is divided into two paths, one path is connected with a +24V power supply through a resistor R14, the other path is grounded through a resistor R15, and a 3 rd pin of the 555 timer U2 is the output end of the flame signal detection circuit board (7).
3. An integrated explosion proof ultraviolet flame detector as set forth in claim 2, wherein: the turn ratio of the transformer T1 is 6: 125.
4. An integrated explosion proof ultraviolet flame detector as set forth in claim 1, wherein: the output end of the flame signal detection circuit board (7) and the button (10) are connected with the input end of the microcontroller, and the nixie tube (9) is connected with the output end of the microcontroller.
5. An integrated explosion proof ultraviolet flame detector as set forth in claim 1, wherein: the ultraviolet radiation tube (3) is an ultraviolet radiation tube with the model of R2868.
6. An integrated explosion proof ultraviolet flame detector as set forth in claim 1, wherein: the aperture of the through hole (4) is gradually reduced from the outer side of the front cover (5) to the inner side of the front cover (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023338767.5U CN213933578U (en) | 2020-12-31 | 2020-12-31 | Integrated explosion-proof ultraviolet flame detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023338767.5U CN213933578U (en) | 2020-12-31 | 2020-12-31 | Integrated explosion-proof ultraviolet flame detector |
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| Publication Number | Publication Date |
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| CN213933578U true CN213933578U (en) | 2021-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023338767.5U Active CN213933578U (en) | 2020-12-31 | 2020-12-31 | Integrated explosion-proof ultraviolet flame detector |
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| Country | Link |
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| CN (1) | CN213933578U (en) |
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2020
- 2020-12-31 CN CN202023338767.5U patent/CN213933578U/en active Active
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