CN211826329U - Gas pipeline fault alarm - Google Patents
Gas pipeline fault alarm Download PDFInfo
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- CN211826329U CN211826329U CN202020308768.6U CN202020308768U CN211826329U CN 211826329 U CN211826329 U CN 211826329U CN 202020308768 U CN202020308768 U CN 202020308768U CN 211826329 U CN211826329 U CN 211826329U
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Abstract
The utility model discloses a gas pipeline fault alarm belongs to electronic alarm technical field. The lightning protection device comprises an LED light-emitting diode driving circuit consisting of a relay J1, a diode D1, a resistor R1, a light-emitting diode D2 and a direct-current power supply BATT1, and a lightning protection overvoltage protection circuit consisting of a transient diode D4, a ceramic gas discharge tube D5, an inductor L1 and a variable resistor R2; the utility model has the characteristics of job stabilization, sealed waterproof explosion-proof, long service life, the low power dissipation does not receive the influence etc. of pollutant and water. Meanwhile, the alarm adopts a rapid installation design, does not need any debugging after being installed, is directly used, achieves the general purpose, and is used for detecting whether the insulativity of the insulating flange is invalid or not.
Description
Technical Field
The utility model relates to an alarm, especially gas pipeline malfunction alerting belongs to electronic alarm technical field.
Background
At present, gas energy is an essential part in daily life, and among various gas energy types, a gas pipeline buried underground is an indispensable part. The cathode protection in the fuel gas pipeline is the most common fuel gas pipeline protection method at present, and is a protection measure mainly aiming at the fuel gas pipeline buried underground. In the whole cathodic protection system, the insulation level of the pipeline plays a critical role in whether cathodic protection is effective or not. The insulation of the pipeline is mainly flange insulation, so the purpose of protecting the gas pipeline can be achieved only by detecting the insulation performance of the flange.
SUMMERY OF THE UTILITY MODEL
To the problem, the utility model provides a gas pipeline fault alarm.
The utility model provides a technical scheme that its technical problem adopted is: the lightning protection device comprises an LED light-emitting diode driving circuit consisting of a relay J1, a diode D1, a resistor R1, a light-emitting diode D2 and a direct-current power supply BATT1, and a lightning protection overvoltage protection circuit consisting of a transient diode D4, a ceramic gas discharge tube D5, an inductor L1 and a variable resistor R2; the light emitting diode D2, the resistor R1, the diode D1 are connected in series with the negative electrode of the direct current power supply BATT1 and then connected in parallel with the transient diode D4; the positive pole of the light emitting diode D2 is connected with the inductor L1 and then connected with the variable resistor R1 in parallel, and the two ends are connected with the variable resistor R1. The ceramic gas discharge pipes D5 are connected in parallel; both ends are coupled to both ends of the relay J1.
The beneficial effects of the utility model are that, this alarm is applicable to the explosive gas atmosphere place that contains IIC level, T6 temperature group are other, still can use in 1 district and 2 district's explosion-proof places that trades such as petroleum, chemical industry have explosion-proof requirement, can outdoor open-air use. Can be matched with the insulating flanges of any manufacturers at home and abroad for use. The water-proof and explosion-proof water tank has the characteristics of stable work, sealing, water proofing and explosion proofing, long service life, low power consumption, no influence of pollutants and water and the like. Meanwhile, the alarm is designed in a fool-type manner, does not need debugging personnel to have strong professional knowledge, does not need any debugging after being installed, is directly used, and achieves the general purpose. When the light alarm signal is started, the light alarm signal reminds maintenance personnel to process the light alarm signal, and the aim of simple light alarm is fulfilled. The utility model relates to an use terminal flange insulation failure fault alarm on natural gas line air-vent valve insulating flange is the alarm whether insulating nature that is used for detecting insulating flange became invalid.
Drawings
FIG. 1 is an electrical schematic diagram of the present invention;
parts and numbering in the figures:
r1-resistor, R2-variable resistor, D1-diode, D2-LED,
d4-transient diode, D5-ceramic gas discharge tube, L1-inductor, J1-relay.
Detailed Description
The present invention will be further described with reference to the following examples.
Referring to fig. 1, based on the consideration of the flange insulation cathode protection, the utility model adopts the insulation failure mode of the end flange, reduces the circuit interference and simplifies the circuit design, wherein D2 is a light emitting diode, the resistor R1 is a current limiting resistor, and the diode D1 is used for controlling the unidirectional conduction; when the insulation degree of the insulating flange is reduced to the state that the two ends 1 and 2 of the relay J1 are conducted, the battery (direct current power supply BATT1) drives the light emitting diode D2 to light, and alarm information is sent out. An P6KE6.8CA type transient diode D4, a UN2E5-75LL type ceramic gas discharge tube D5, an inductor L1 and a variable resistor R2 form a lightning protection overvoltage protection circuit, and when lightning strikes cause overvoltage at the 1 and 2 ends of a relay J1, the transient diode D4 is turned on in a pilot mode to limit the overvoltage from impacting a light-emitting diode driving circuit; when the overvoltage continues to rise, in order to protect the transient diode D4 and a subsequent light emitting diode driving circuit, the variable resistor R2 and the ceramic gas discharge tube D5 are sequentially conducted to discharge lightning strike overcurrent, so that the overvoltage is controlled not to damage the light emitting diode driving circuit. The parameters of each component are as follows: the resistor R1 is 100R, the variable resistor (voltage dependent resistor) R2 is 10D471K, the inductor L is 33 muH, the diode D1 is 1N414S, the light emitting diode D2 (LED), the transient diode D4 is P6KE6.8CA, the ceramic gas discharge tube D5 is UN2E5-75L, the relay J1 is CON2, and the direct current power supply is a button cell CR 2477.
The material formula provided by the utility model mainly comprises a closed cast aluminum alloy material shell as a leading object, and the appearance physical size of the shell is 64 x 58 x 35 mm; compared with other shells, the material has corrosion resistance and compressive strength, and the thickness of the material reaches more than 4 mm; the waterproof performance is good, and the waterproof grade is IP 65.
In the design of alarm circuit, combine the utility model provides a material formula, drop into the alarm to indoor or outdoor experiment, its normal operating temperature is-20 ~85 ℃, and the normal operating temperature of storing of inside device can reach-40 ~85 ℃, and it all is less than or equal to 93% RH in indoor outer humidity detection.
In the design of the alarm circuit, a power supply of DC3V is connected, the rated power of the output of the power supply is 1.4mW, and the power consumption in idle state is 0.45 mW. Under the detection of 8/20us lightning protection in a lightning protection laboratory, the lightning flow is more than or equal to 10KA, and the lightning protection level of fine protection is achieved.
Claims (2)
1. A gas pipeline fault alarm comprises an LED light-emitting diode driving circuit consisting of a relay (J1), a diode (D1), a resistor (R1), a light-emitting diode (D2) and a direct current power supply (BATT 1), and a lightning protection overvoltage protection circuit consisting of a transient diode (D4), a ceramic gas discharge tube (D5), an inductor (L1) and a variable resistor (R2); the LED driving circuit is characterized in that the LED (D2), the resistor (R1), the diode (D1) and the negative electrode of the direct current power supply (BATT 1) are connected in series and then connected in parallel with the transient diode (D4); the anode of the light emitting diode (D2) is connected with an inductor (L1) and then is connected with a variable resistor (R1) in parallel, and the two ends of the light emitting diode are connected with a ceramic gas discharge tube (D5) in parallel; both ends are connected with both ends of a relay (J1).
2. The gas pipeline fault alarm of claim 1, wherein said resistor (R1) is a current limiting resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020308768.6U CN211826329U (en) | 2020-03-13 | 2020-03-13 | Gas pipeline fault alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020308768.6U CN211826329U (en) | 2020-03-13 | 2020-03-13 | Gas pipeline fault alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211826329U true CN211826329U (en) | 2020-10-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020308768.6U Active CN211826329U (en) | 2020-03-13 | 2020-03-13 | Gas pipeline fault alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211826329U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115681826A (en) * | 2022-11-09 | 2023-02-03 | 四川利能燃气工程设计有限公司 | Fault detection method and kit for insulation failure of steel pipeline |
-
2020
- 2020-03-13 CN CN202020308768.6U patent/CN211826329U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115681826A (en) * | 2022-11-09 | 2023-02-03 | 四川利能燃气工程设计有限公司 | Fault detection method and kit for insulation failure of steel pipeline |
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