CN202792091U - Anti-explosion ultraviolet light flame detector - Google Patents
Anti-explosion ultraviolet light flame detector Download PDFInfo
- Publication number
- CN202792091U CN202792091U CN 201220400953 CN201220400953U CN202792091U CN 202792091 U CN202792091 U CN 202792091U CN 201220400953 CN201220400953 CN 201220400953 CN 201220400953 U CN201220400953 U CN 201220400953U CN 202792091 U CN202792091 U CN 202792091U
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- ultraviolet light
- explosion
- flame
- circuit
- flame detector
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Abstract
An anti-explosion ultraviolet light flame detector is suitable for flame monitoring of a gas-fired boiler. The anti-explosion ultraviolet light flame detector comprises a flame detecting device and a breakdown self-checking return circuit. The flame detecting device comprises a direct current (DC)/ direct current (DC) voltage converter, a ultraviolet light sensing tube, an I / voltage (I/V )conversion circuit, a schmitt trigger, a monostable trigger-action circuit and an output relay, wherein the direct current (DC)/ direct current (DC) voltage converter, the ultraviolet light sensing tube, the I / voltage (I/V) conversion circuit, the schmitt trigger, the monostable trigger-action circuit and the output relay are sequentially connected. An indicator light is arranged on a circuit board, wherein the indicator light is used for indicating whether a flame exists or not. An explosive-proof shell body is arranged outside the breakdown self-checking return circuit, wherein the explosive-proof shell body is adopted to prevent explosion, and the breakdown self-checking return circuit is adopted to check a breakdown and can detects a key component of the flame detector. The anti-explosion ultraviolet light flame detector has the advantages of being simple in structure, convenient to use and reliable in performance.
Description
Technical field
The utility model relates to a kind of flame detector, especially relates to a kind of explosion-proof ultraviolet light flame detector that uses in the gas fired-boiler security monitoring.
Background technology
In industrial circle, there are various Industrial Boilers take gas, natural gas, coke oven producer gas and blast furnace gas etc. as fuel, if light a fire unsuccessful or when normal combustion because of certain former thereby died, if this moment, untimely fuel shutoff just may cause explosion accident because continuing to drop into fuel after flame-out.Boiler FSSS system can detect the boiler combustion situation, the input of the timely fuel shutoff of energy when the boiler combustion situation is unstable or flame-out, flame detector can detect combustion position, be an important component part of burner hearth safeguard protection FSSS system, be related to safety in production and the stable operation of boiler; Gas fired-boiler belongs to explosive hazard environment, and equipment must possess requirement of explosion proof on it.
Summary of the invention
The purpose of this utility model is for the weak point in the prior art, and a kind of simple in structure, easy to use, explosion-proof ultraviolet light flame detector that reliability is high is provided.
For achieving the above object, explosion-proof ultraviolet light flame detector of the present utility model comprises flame detecting device and fault self-checking loop; Described flame detecting device comprises DC/DC high tension transformer, ultraviolet light sensing tube, I/V change-over circuit, Schmidt trigger, single-shot trigger circuit and the output relay that is linked in sequence, output relay has or not flare up fire, single-shot trigger circuit to be connected with indication for output aphlogistic indicator lamp; Described fault self-checking is provided with explosion-proof casing outside the loop.
The model of described DC/DC high tension transformer is FM10-24S400, and the model of ultraviolet light sensing tube is GD-34, and the model of Schmidt trigger is CD4093, and the model 555 of single-shot trigger circuit, the model of output relay are G2R-2.
Beneficial effect: the utility model utilizes the ultraviolet lighting in the flame to be mapped on the ultraviolet light sensing tube, ultraviolet light sensing tube discharge generation electric current, the I/V change-over circuit is converted into voltage pulse signal, through Schmidt trigger, after single-shot trigger circuit is processed, have or not flame to differentiate, provide corresponding indication and output, and adopt explosion-proof casing to carry out explosion-proof, adopt the fault self-checking loop to carry out fault self-checking, can carry out fault detect to the flame detector key components, improved reliability, adopt A/D change-over circuit at a high speed, the flare up fire inclusion information that collects is abundant, the amplitude of all frequencies below comprising from the direct current to 512Hz improves single nozzles detecting reliability, realizes that stable single nozzles detect; Adopt explosion-proof casing to carry out Explosion-proof Design, guarantee that flame detector may operate in the explosive hazard environment.It is simple in structure, and is easy to use, safe and reliable, effective, has in the art widely practicality.
Description of drawings
Fig. 1 flame detector theory diagram of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing an embodiment of the present utility model is further described:
As shown in Figure 1, explosion-proof ultraviolet light flame detector of the present utility model comprises flame detecting device and fault self-checking loop, flame detecting device comprises and is installed on DC/DC high tension transformer on the same circuit board, the output of DC/DC high tension transformer is connected with ultraviolet light sensing tube, the output of ultraviolet light sensing tube is connected with I/V change-over circuit (current-voltage conversion circuit), connect successively Schmidt trigger through the I/V change-over circuit, single-shot trigger circuit and output relay, output relay is used for output and has or not flare up fire, circuit board is provided with indication aphlogistic indicator lamp, and outside, described fault self-checking loop is provided with explosion-proof casing; The model of described DC/DC high tension transformer is FM10-24S400, and the model of ultraviolet light sensing tube is GD-34, and the model of Schmidt trigger is CD4093, and the model of single-shot trigger circuit is 555, and the model of relay is G2R-2; Ultraviolet lighting in the flame is mapped on the ultraviolet light sensing tube, ultraviolet light sensing tube discharge generation current signal, the I/V change-over circuit with current signal be converted to voltage pulse signal, after Schmidt trigger, single-shot trigger circuit are processed, have or not flame to differentiate, provide corresponding indication and output, it is explosion-proof to adopt explosion-proof casing to carry out, and utilizes the fault self-checking loop, the self-operating situation is carried out fault self-checking, and the output fault status signal.
Claims (2)
1. explosion-proof ultraviolet light flame detector, it is characterized in that: it comprises flame detecting device and fault self-checking loop; Described flame detecting device comprises DC/DC high tension transformer, ultraviolet light sensing tube, I/V change-over circuit, Schmidt trigger, single-shot trigger circuit and the output relay that is linked in sequence, output relay has or not flare up fire, single-shot trigger circuit to be connected with indication for output aphlogistic indicator lamp; Described fault self-checking is provided with explosion-proof casing outside the loop.
2. explosion-proof ultraviolet light flame detector according to claim 1, it is characterized in that, the model of described DC/DC high tension transformer is FM10-24S400, the model of ultraviolet light sensing tube is GD-34, the model of Schmidt trigger is CD4093, the model 555 of single-shot trigger circuit, the model of output relay are G2R-2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220400953 CN202792091U (en) | 2012-08-14 | 2012-08-14 | Anti-explosion ultraviolet light flame detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220400953 CN202792091U (en) | 2012-08-14 | 2012-08-14 | Anti-explosion ultraviolet light flame detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202792091U true CN202792091U (en) | 2013-03-13 |
Family
ID=47819347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220400953 Expired - Lifetime CN202792091U (en) | 2012-08-14 | 2012-08-14 | Anti-explosion ultraviolet light flame detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202792091U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872387A (en) * | 2017-02-23 | 2017-06-20 | 苏州亚欧美机器人智能科技有限公司 | A kind of ultraviolet optical detection device of super low-power consumption |
-
2012
- 2012-08-14 CN CN 201220400953 patent/CN202792091U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872387A (en) * | 2017-02-23 | 2017-06-20 | 苏州亚欧美机器人智能科技有限公司 | A kind of ultraviolet optical detection device of super low-power consumption |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 221004 No. 12 Yang Shan Road, Xuzhou Economic Development Zone, Jiangsu, China Patentee after: XUZHOU KERONG ENVIRONMENTAL RESOURCES Co.,Ltd. Address before: 221004 No. 12 Yang Shan Road, Xuzhou Economic Development Zone, Jiangsu, China Patentee before: XUZHOU COMBUSTION CONTROL TECHNOLOGY Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |