CN115681826A - Fault detection method and kit for insulation failure of steel pipeline - Google Patents
Fault detection method and kit for insulation failure of steel pipeline Download PDFInfo
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- CN115681826A CN115681826A CN202211400591.2A CN202211400591A CN115681826A CN 115681826 A CN115681826 A CN 115681826A CN 202211400591 A CN202211400591 A CN 202211400591A CN 115681826 A CN115681826 A CN 115681826A
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- diode
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- 238000009413 insulation Methods 0.000 title claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 title claims abstract description 21
- 239000010959 steel Substances 0.000 title claims abstract description 21
- 229910052751 metal Inorganic materials 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 14
- 230000001052 transient effect Effects 0.000 claims description 13
- 239000000919 ceramic Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 7
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 4
- 208000025274 Lightning injury Diseases 0.000 claims description 3
- 230000003116 impacting effect Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 5
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 10
- 239000003345 natural gas Substances 0.000 description 5
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000002737 fuel gas Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004210 cathodic protection Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
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- 230000002265 prevention Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
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Abstract
The invention provides a fault detection method and a kit for insulation failure of a steel pipeline. The steel pipeline insulation failure fault detection kit comprises two flanges and a pipeline; the insulating gasket is movably and hermetically arranged between the two flanges; the bolts are movably arranged on the two flanges; a nut threadedly mounted on the bolt; the bolt insulating pad is movably sleeved on the bolt and is positioned between the flange and the nut; the bolt insulating sleeve is fixedly sleeved on the bolt; two electrically conductive metal pads, one of said electrically conductive metal pads being disposed between one of the flanges and the bolt. The fault detection method and the kit for the insulation failure of the steel pipeline have the advantages of detecting whether the insulation of the insulation flange fails or not, achieving the purpose of light alarm and being convenient for reminding maintenance personnel.
Description
Technical Field
The invention relates to the technical field of pipeline insulation failure detection, in particular to a fault detection method and a kit for steel pipeline insulation failure.
Background
In modern life, gas energy is an essential part of daily life, and among numerous 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 mainly comprises flange insulation, and the purpose of protecting the gas pipeline can be achieved only by detecting the insulation performance of the flange.
Therefore, there is a need to provide a new method and kit for detecting insulation failure of steel pipe to solve the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a fault detection method and a kit for detecting whether the insulativity of an insulation flange is invalid, achieving the purpose of light alarm and conveniently reminding maintenance personnel of the insulation failure of a steel pipeline.
In order to solve the technical problem, the fault detection method and the kit for the insulation failure of the steel pipeline provided by the invention comprise the following steps: two flanges and a pipe; the insulating gasket is movably and hermetically arranged between the two flanges; the bolts are movably arranged on the two flanges; a nut threadedly mounted on the bolt; the bolt insulating pad is movably sleeved on the bolt and is positioned between the flange and the nut; the bolt insulating sleeve is fixedly sleeved on the bolt; two conductive metal pads, one of which is disposed between one flange and the bolt and the other of which is disposed between the other flange and the nut; the lead wire is welded on the conductive metal pad; the protective sleeve is arranged on the pipeline; the fault alarm is arranged on the protective sleeve, and the outgoing line penetrates through the protective sleeve and is connected with the fault alarm.
Preferably, the fault alarm comprises a light emitting diode driving circuit consisting of a relay, a diode, a resistor, a light emitting diode and a direct current power supply, and a lightning protection overvoltage protection circuit consisting of a transient diode, a ceramic gas discharge tube, an inductor and a variable resistor.
Preferably, the light emitting diode, the resistor, the diode and the negative electrode of the direct current power supply are connected in series and then connected in parallel with the transient diode, the positive electrode of the light emitting diode is connected with the inductor and then connected in parallel with the variable resistor, two ends of the light emitting diode are connected in parallel with the ceramic gas discharge tube, and two ends of the light emitting diode are connected with two ends of the relay.
Preferably, the resistor is a current-limiting resistor, and the diode is used for controlling unidirectional conduction.
A fault detection method for insulation failure of a steel pipeline comprises the following steps:
s1: when the insulating gasket is worn after long-time use, the insulating degree of the two flanges is reduced, so that the conductive metal pad, the outgoing line and the fault alarm are conducted;
s2: after the fault alarm is switched on, two ends of a relay in the fault alarm are switched on, and a direct current power supply BATT drives a light emitting diode to light up to send alarm information;
s3: when lightning strike causes overvoltage at the end of the relay, the transient diode is firstly conducted to limit the overvoltage from impacting the light-emitting diode driving circuit;
s4: when the overvoltage continues to rise, in order to protect the transient diode and a subsequent light emitting diode driving circuit, the variable resistor and the ceramic gas discharge tube are sequentially conducted to discharge lightning stroke overcurrent, and the overvoltage is controlled so as not to damage the light emitting diode driving circuit.
Compared with the related art, the steel pipeline insulation failure fault detection method and the kit provided by the invention have the following beneficial effects:
the device is applied to the insulating flange of the natural gas pipeline pressure regulating valve, is used for detecting whether the insulativity of the insulating flange is invalid or not, and when the insulativity of the insulating flange in front of the natural gas pressure regulating valve is reduced, the device starts a light alarm to send out a light alarm signal to remind maintenance personnel to process, so that the aim of simple light alarm is fulfilled.
Drawings
FIG. 1 is a schematic structural view of a preferred embodiment of a steel pipe insulation failure fault detection kit according to the present invention;
fig. 2 is a circuit schematic of the fault alarm shown in fig. 1.
Reference numbers in the figures: 1. a flange; 2. a pipeline; 3. an insulating spacer; 4. a bolt; 5. a nut; 6. a bolt insulating pad; 7. a bolt insulating sleeve; 8. a conductive metal pad; 9. an outgoing line; 10. a fault alarm; 11. a protective sleeve; d1, a diode; d2, a light-emitting diode; d4, a transient diode; d5, a ceramic gas discharge pipe; l1, inductance; j1, a relay; r1 and resistance; r2 and a variable resistor.
Detailed Description
The invention is further described with reference to the following figures and embodiments.
The first embodiment is as follows:
referring to fig. 1-2, a method and kit for detecting a failure in insulation of a steel pipe includes: two flanges 1 and a pipe 2; the insulating gasket 3 is movably and hermetically arranged between the two flanges 1; the bolts 4 are movably arranged on the two flanges 1; the nut 5 is mounted on the bolt 4 in a threaded mode; the bolt insulating pad 6 is movably sleeved on the bolt 4, and the bolt 4 insulating pad is positioned between the flange 1 and the nut 5; the bolt insulating sleeve 7 is fixedly sleeved on the bolt 4, and the bolt insulating sleeve 7 is fixedly sleeved on the bolt 4; two electrically conductive metal pads 8, one said electrically conductive metal pad 8 being disposed between one said flange 1 and the bolt 4, the other said electrically conductive metal pad 8 being disposed between the other said flange 1 and the nut 5; a lead wire 9, wherein the lead wire 9 is welded on the conductive metal pad 8; the protection sleeve 11, the protection sleeve 11 is arranged on the pipeline 2; the alarm device 10, the alarm device 10 sets up on lag 11, lead-out wire 9 runs through lag 11 and with the alarm device 10 is connected.
The fault alarm 10 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 and the negative electrode of the direct current power supply BATT1 are connected in series and then connected in parallel with the transient diode D4, the positive electrode of the light emitting diode D2 is connected with the inductor L1 and then connected in parallel with the variable resistor R2, two ends of the light emitting diode D2 are connected in parallel with the ceramic gas release pipe D5, and two ends of the light emitting diode D2 are connected with two ends of the relay J1.
The resistor R1 is a current-limiting resistor, and the diode D1 is used for controlling one-way conduction.
The fault alarm 10 is suitable for explosive gas environment places containing IIC grade T6 temperature groups, can also be used in 1-zone and 2-zone explosion-proof places with explosion-proof requirements in industries such as petroleum, chemical engineering and the like, and can be used outdoors and outdoors. Can be matched with the insulating flanges of any manufacturers at home and abroad for use. When the insulation degree of an insulation flange in front of the natural gas pressure regulating valve is reduced, the device starts a light alarm to send out a light alarm signal to remind maintenance personnel to process, and the aim of simple light alarm is fulfilled. 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.
The fault alarm 10 is put into indoor or outdoor experiments, the normal working temperature is-20 ℃ and the normal storage working temperature of the internal devices can reach-40 ℃, and the RH is less than or equal to 93% in indoor and outdoor humidity detection.
In the design of the alarm circuit, a DC3V power supply is connected, the output rated power is 1.4mW, the power consumption in no-load is 0.45mW, and the lightning flux of the lightning is more than or equal to 10KA under the detection of 8/20us lightning protection in a lightning protection laboratory, so that the lightning protection level of fine protection is achieved.
The invention mainly comprises that a closed cast aluminum alloy material shell is taken as a leading object, and the appearance physical size is 64 × 58 × 35mm; 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 IP65.
Example two:
the embodiment provides a fault detection method for insulation failure of a steel pipeline, and the fault detection kit for insulation failure of a steel pipeline, which comprises the following steps:
s1: the insulating gasket 3 is worn after long-time use, the insulating degree of the two flanges 1 is reduced, and the conductive metal pad 8, the outgoing line 9 and the fault alarm 10 are conducted;
s2: after the fault alarm 10 is turned on, the two ends 1 and 2 of the relay J1 in the fault alarm are turned on, and the direct-current power supply BATT1 drives the light-emitting diode D2 to light up to send out alarm information.
S3: when lightning strikes cause overvoltage at the ends 1 and 2 of the relay J1, the transient diode D4 is conducted in a pilot mode to limit the overvoltage from impacting the light-emitting diode driving circuit;
s4: 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 conducted in sequence to discharge lightning stroke overcurrent, and the overvoltage is controlled so as not to damage the light emitting diode driving circuit.
Compared with the related art, the steel pipeline insulation failure fault detection method and the kit provided by the invention have the following beneficial effects:
the device is applied to the insulating flange of the natural gas pipeline pressure regulating valve, is used for detecting whether the insulativity of the insulating flange fails or not, starts light alarm when the insulativity of the insulating flange in front of the natural gas pipeline pressure regulating valve is reduced, sends out light alarm signals to remind maintenance personnel to process, achieves the aim of simple light alarm, and has the characteristics of stable work, sealing, water and explosion prevention, long service life, low power consumption, no influence of pollutants and water and the like.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (5)
1. A fault detection kit for insulation failure of a steel pipe, comprising:
two flanges and a pipe;
the insulating gasket is movably and hermetically arranged between the two flanges;
the bolts are movably arranged on the two flanges;
a nut threadedly mounted on the bolt;
the bolt insulating pad is movably sleeved on the bolt and is positioned between the flange and the nut;
the bolt insulating sleeve is fixedly sleeved on the bolt;
two conductive metal pads, one of which is disposed between one flange and the bolt and the other of which is disposed between the other flange and the nut;
the lead wire is welded on the conductive metal pad;
the protective sleeve is arranged on the pipeline;
the fault alarm is arranged on the protective sleeve, and the outgoing line penetrates through the protective sleeve and is connected with the fault alarm.
2. The steel pipeline insulation failure fault detection kit as claimed in claim 1, wherein the fault alarm comprises a light emitting diode driving circuit consisting of a relay, a diode, a resistor, a light emitting diode and a direct current power supply, and a lightning protection overvoltage protection circuit consisting of a transient diode, a ceramic gas release pipe, an inductor and a variable resistor.
3. The steel pipeline insulation failure fault detection kit of claim 2, wherein the light emitting diode, the resistor, the diode are connected in series with the negative electrode of the direct current power supply and then connected in parallel with the transient diode, the positive electrode of the light emitting diode is connected in parallel with the inductor and then connected in parallel with the variable resistor, the two ends of the light emitting diode are connected in parallel with the ceramic gas release pipe, and the two ends of the light emitting diode are connected with the two ends of the relay.
4. The steel pipe insulation failure fault detection kit of claim 3, wherein the resistor is a current limiting resistor and the diode is a unidirectional conduction control diode.
5. A method for detecting insulation failure of steel pipes, wherein the method comprises the following steps:
s1: when the insulating gasket is worn after long-time use, the insulating degrees of the two flanges are reduced, so that the conductive metal pad, the outgoing line and the fault alarm are conducted;
s2: after the fault alarm is switched on, two ends of a relay in the fault alarm are switched on, and the direct-current power supply drives the light-emitting diode to emit light to send alarm information;
s3: when lightning strike causes overvoltage at the end of the relay, the transient diode is firstly conducted to limit the overvoltage from impacting the light-emitting diode driving circuit;
s4: when the overvoltage continues to rise, in order to protect the transient diode and a subsequent light emitting diode driving circuit, the variable resistor and the ceramic gas discharge tube are sequentially conducted to discharge lightning stroke overcurrent, and the overvoltage is controlled so as not to damage the light emitting diode driving circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211400591.2A CN115681826A (en) | 2022-11-09 | 2022-11-09 | Fault detection method and kit for insulation failure of steel pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211400591.2A CN115681826A (en) | 2022-11-09 | 2022-11-09 | Fault detection method and kit for insulation failure of steel pipeline |
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| Publication Number | Publication Date |
|---|---|
| CN115681826A true CN115681826A (en) | 2023-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211400591.2A Pending CN115681826A (en) | 2022-11-09 | 2022-11-09 | Fault detection method and kit for insulation failure of steel pipeline |
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| Country | Link |
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| CN (1) | CN115681826A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2128332Y (en) * | 1992-01-27 | 1993-03-17 | 大庆石油管理局油田建设设计研究院 | Lined insulation flange |
| CN204575681U (en) * | 2015-04-12 | 2015-08-19 | 湘潭市华宇科技有限公司 | Insulating material insulating property detector guard warning circuit |
| CN208431485U (en) * | 2018-07-24 | 2019-01-25 | 杨志远 | A kind of natural gas line connecting flange that high-pressure-resistant sealed is good |
| CN211040022U (en) * | 2019-12-18 | 2020-07-17 | 成都市三为技术有限责任公司 | Flange insulation assembly with fault alarm function |
| CN211203235U (en) * | 2019-12-18 | 2020-08-07 | 成都市三为技术有限责任公司 | Pipeline flange insulation assembly with protection structure |
| CN111665394A (en) * | 2020-06-12 | 2020-09-15 | 湖南中科圆博科技有限公司 | Insulation detection protection system of electric locomotive |
| CN211826329U (en) * | 2020-03-13 | 2020-10-30 | 成都市三为技术有限责任公司 | Gas pipeline fault alarm |
| CN115654235A (en) * | 2022-11-09 | 2023-01-31 | 四川利能燃气工程设计有限公司 | Method and kit for steel pipeline insulation |
-
2022
- 2022-11-09 CN CN202211400591.2A patent/CN115681826A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2128332Y (en) * | 1992-01-27 | 1993-03-17 | 大庆石油管理局油田建设设计研究院 | Lined insulation flange |
| CN204575681U (en) * | 2015-04-12 | 2015-08-19 | 湘潭市华宇科技有限公司 | Insulating material insulating property detector guard warning circuit |
| CN208431485U (en) * | 2018-07-24 | 2019-01-25 | 杨志远 | A kind of natural gas line connecting flange that high-pressure-resistant sealed is good |
| CN211040022U (en) * | 2019-12-18 | 2020-07-17 | 成都市三为技术有限责任公司 | Flange insulation assembly with fault alarm function |
| CN211203235U (en) * | 2019-12-18 | 2020-08-07 | 成都市三为技术有限责任公司 | Pipeline flange insulation assembly with protection structure |
| CN211826329U (en) * | 2020-03-13 | 2020-10-30 | 成都市三为技术有限责任公司 | Gas pipeline fault alarm |
| CN111665394A (en) * | 2020-06-12 | 2020-09-15 | 湖南中科圆博科技有限公司 | Insulation detection protection system of electric locomotive |
| CN115654235A (en) * | 2022-11-09 | 2023-01-31 | 四川利能燃气工程设计有限公司 | Method and kit for steel pipeline insulation |
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