CN210596269U - Gas pipeline cathodic protection remote monitering system - Google Patents
Gas pipeline cathodic protection remote monitering system Download PDFInfo
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- CN210596269U CN210596269U CN202020073624.7U CN202020073624U CN210596269U CN 210596269 U CN210596269 U CN 210596269U CN 202020073624 U CN202020073624 U CN 202020073624U CN 210596269 U CN210596269 U CN 210596269U
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Abstract
The utility model discloses a gas pipeline cathodic protection remote monitering system, including pipeline, polarization probe, wireless GPRS detector and magnesium sacrificial anode, pipeline, polarization probe, magnesium sacrificial anode are connected to wireless GPRS detector through the wire, and wireless GPRS detector acquires the signal data of pipeline and polarization probe and transmits intelligent early warning platform through wireless network, the pipeline still is provided with shield assembly, shield assembly includes the shielding net of arranging along pipeline length direction, the shielding net is made by galvanized iron wire net, and the shielding net is laid with the parallel interval of pipeline, and shielding net length direction's both sides have linked firmly first soft copper cable, still link to each other through the soft copper cable of second between the first soft copper cable, and first soft copper cable junction has magnesium sacrificial anode. The utility model discloses be provided with wireless GPRS detector, with signal transmission to intelligent early warning platform, still be provided with shield assembly for the alternating current signal interference of shielding subway, high-tension electricity tower.
Description
Technical Field
The utility model relates to a gas pipeline maintains technical field, especially relates to a gas pipeline cathodic protection remote monitering system.
Background
The cathodic protection of the pipeline is an important measure for prolonging the service life of the buried metal fuel gas pipeline and ensuring the safe operation of the pipeline. For many years, the acquisition of the cathode protection data of the pipelines of the gas group always depends on a manual line patrol mode, and the real-time dynamic monitoring of the cathode protection of the pipelines can not be realized.
From 2016, a cathode protection system is adopted by the company to carry out cathode protection on an existing gas pipeline, and comprises a polarization probe, a magnesium sacrificial anode, a wireless GPRS detector, a monitoring pile and an intelligent early warning platform, wherein the wireless GPRS detector is usually arranged in the monitoring pile and is connected with the polarization probe, the magnesium sacrificial anode and the gas pipeline; acquiring signal data such as output current, open-circuit potential, electrified potential, natural potential, power-off potential and the like of the intelligent early warning platform and wirelessly transmitting the signal data to the intelligent early warning platform;
the intelligent early warning platform is already in trial operation in our company, 562 test piles are arranged in the jurisdiction of the branch company at present, and 196 remote transmission test piles account for 35 percent. The detection work of 562 test piles in total in 64 pipelines in the district is completed, the outer ring pipeline is not included, the cathodic protection condition of the suburban pipeline is better, and the cathodic protection coverage rate reaches 100%;
at present, pipeline cathodic protection is adopted for three hundred fifty kilometers of high-pressure gas pipelines, for example, natural gas high-pressure gas pipelines such as a faithful-bumper line, a paper making line, a Changan line, a Wugui line and a head line adopt pipeline cathodic protection, a remote transmission test pile is adopted to transmit data to an intelligent early warning platform, and a maintainer can remotely check detection data of the test pile through the intelligent early warning platform.
The intelligent early warning platform can realize digital, automatic, fine and intelligent management of a pipe network, liberates professionals from daily, repeated, tedious and field maintenance work, and focuses on researching important problems about survival and development of enterprises, such as how to improve the use efficiency of the pipe network, how to prolong the service life of the pipe network, how to improve the quality and the efficiency and the like. By reducing inspection personnel, millions of yuan of labor cost can be directly saved for enterprises every year; the property loss of the careless personnel caused by manual inspection and omission can be effectively reduced, and millions of yuan of efficiency is indirectly increased for enterprises every year; the underground pipe network fault can be monitored in real time and accurately early-warned.
From the online monitoring data that intelligent early warning platform provided, prior art's defect is, can see that the gas pipeline has many places electric potential to have unusually from the attached drawing 3, look over whole teletransmission data of arrangement, find that the electric potential is unusual to take place in the gas pipeline and subway, high-tension electricity tower and the position that exchanges electric railway parallel or cross.
Because the fuel gas pipeline is partially parallel to or crossed with the subway, the high-voltage power tower and the alternating current electrified railway, the fuel gas pipeline has obvious alternating current stray current interference, the cathode protection potential of the buried pipeline is in a disordered state during the operation of the subway, and the corrosion is possibly generated.
SUMMERY OF THE UTILITY MODEL
In view of at least one defect of prior art, the utility model aims at providing a gas pipeline cathodic protection remote monitering system is provided with wireless GPRS detector, gives intelligent early warning platform with detected signal data transfer, still is provided with shield assembly for the alternating current signal interference of shielding subway, high-tension electricity tower prevents that the pipeline from producing induced voltage because of interference signal and taking place to corrode, and this shield assembly cost is lower, and the corrosion-resistant ability is strong.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a gas pipeline cathode protection remote monitoring system comprises a pipeline, a polarization probe, a wireless GPRS detector and a first magnesium sacrificial anode, wherein the pipeline, the polarization probe and the first magnesium sacrificial anode are connected to the wireless GPRS detector through leads;
the wireless GPRS detector acquires signal data such as output current, open-circuit potential, electrified potential, natural potential and outage current potential of a pipeline, a polarization probe and a first magnesium sacrificial anode and transmits the signal data to the intelligent early warning platform through a wireless network;
the pipeline is characterized in that the pipeline is also provided with a shielding device, the shielding device comprises a shielding net arranged along the length direction of the pipeline, the shielding net is made of a galvanized iron wire net, the shielding net and the pipeline are laid in parallel at intervals, two sides of the length direction of the shielding net are fixedly connected with first soft copper cables, the first soft copper cables are connected through second soft copper cables, and the first soft copper cables are connected with second magnesium sacrificial anodes; the width of the shielding net is larger than 1.2 times of the diameter of the pipeline, the distance between the shielding net and the pipeline is larger than 20cm and smaller than 100cm, and the shielding net is positioned on one side of the pipeline facing the electromagnetic wave interference source.
Through foretell structure setting, at pipeline and subway, high-voltage electricity tower parallel or criss-cross position, set up the shielding net, the shielding net is laid with the parallel interval of pipeline, and the shielding net sets up in the pipeline and is close to one side of subway, high-voltage electricity tower isoelectromagnetic wave interference source, goes back electromagnetic wave signal reflection, prevents that the alternating current electromagnetic wave that subway, high-voltage electricity tower's high-voltage cable produced from producing alternating current induced voltage on the pipeline and take place to corrode.
In order to facilitate laying of the shielding device and reduce cost, the shielding net is made of a galvanized iron wire net, the cost is lower compared with a copper net, but the iron wire is more active than the chemical property of a copper wire and has poor conductivity, and corrosion is easy to occur in soil, so that a second magnesium sacrificial anode needs to be connected, the corrosion of the galvanized iron wire net is reduced through the cathode protection effect of the second magnesium sacrificial anode, and a first soft copper cable needs to be arranged due to the serious voltage attenuation along the length direction of the pipeline because the conductivity of the iron wire net is extremely poor, and is welded with the two sides of the galvanized iron wire net; the first soft copper cables are connected through the second soft copper cables, so that the voltages on two sides of the galvanized wire mesh are relatively balanced, and the corrosion of the galvanized wire mesh is reduced; the second magnesium sacrificial anode can also be replaced by a direct-current power supply, and the direct-current power supply applies negative voltage to the galvanized wire netting, so that the galvanized wire netting is protected by a cathode, and the corrosion of the galvanized wire netting is reduced.
Through foretell structure setting, provide a simple structure, low cost, corrosion-resistant effectual shield assembly.
If the width of the shielding net is too small, the shielding effect cannot be achieved, so the width of the shielding net is preferably larger than 1.2 times of the diameter of the pipeline, in addition, the shielding net and the pipeline should not be in contact so as to avoid transmitting induction signals generated by the shielding net to the pipeline, so the distance between the shielding net and the pipeline should be larger than 20cm, but the distance between the shielding net and the pipeline cannot be too far so as to avoid influencing the shielding effect, so the distance is smaller than 100cm, and the shielding net is positioned on the side, facing the electromagnetic wave interference source, of the pipeline and shields the electromagnetic waves generated by the electromagnetic wave interference source.
The device also comprises a monitoring pile, wherein at least five detection columns are arranged in the monitoring pile, the pipeline, the polarization probe and the first magnesium sacrificial anode are connected to the corresponding detection columns through leads, and the corresponding detection columns are connected with the wireless GPRS detector.
Through setting up the monitoring stake, be connected to the pipeline with the signal data of polarization probe, first magnesium sacrificial anode on the detection post that corresponds through the wire, conveniently connect wireless GPRS detector, also make things convenient for the maintenance personal to pass through the manual work data that detect of universal meter.
The monitoring pile comprises a base, a monitoring cylinder is vertically arranged on the base, the upper end and the lower end of the monitoring cylinder are open, the upper end of the monitoring cylinder is detachably provided with a top cover, the base is provided with a through hole through which a wire passes, the through hole is opposite to the opening at the lower end of the monitoring cylinder, an inner cavity of the monitoring cylinder is fixedly provided with a mounting plate, a detection column is arranged on the mounting plate, and the base and the monitoring cylinder are made of glass fiber reinforced plastic materials.
The pipeline, the polarization probe and the lead of the first magnesium sacrificial anode are led into the monitoring cylinder through the hole, connected with the corresponding detection column and transmit signals to the wireless GPRS detector through the detection column.
The base and the monitoring cylinder are made of glass fiber reinforced plastic materials, and have strong corrosion resistance.
The circumference of the monitoring cylinder is sleeved with a metal shielding cylinder, and the metal shielding cylinder is made of a galvanized iron wire net and is grounded.
The monitoring cylinders close to the subway 8 and the high-voltage tower are sleeved with metal shielding cylinders, and the metal shielding cylinders shield electromagnetic wave signals sent by the subway 8 and the high-voltage tower, so that the electromagnetic wave signals are prevented from generating induced voltage on the wires and influencing the accuracy of voltage signal detection.
And the upper side and the lower side of the shielding net are both provided with anti-seepage layers, and the anti-seepage layers on the two sides wrap the shielding net therein.
The shielding net can accelerate corrosion under the action of immersed rainwater, so that the upper side and the lower side of the shielding net are both provided with anti-seepage layers, and the anti-seepage layers on the two sides wrap the shielding net in the anti-seepage layers. Can reduce the corrosion of the immersed rainwater and prolong the service life of the shielding net.
The water seepage prevention layer is a polyethylene film.
The polyethylene film has low cost and convenient laying, a layer of polyethylene film is laid under the shielding net, then the shielding net is placed, and then the polyethylene film wraps the shielding net, so that the corrosion resistance is improved.
The utility model provides a gas pipeline cathodic protection remote monitering system is provided with wireless GPRS detector, with detected signal data transfer to intelligent early warning platform, still is provided with shield assembly for the alternating current signal interference of shielding subway, high-tension electricity tower prevents that the pipeline from producing induced voltage because of interference signal and taking place the corruption, and this shield assembly cost is lower, and the corrosion-resistant ability is strong.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a waveform diagram of a pipeline voltage signal interfered by a subway signal;
FIG. 3 is a block diagram of a shielding device;
fig. 4 is a top view of the shielding device.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-4, a gas pipeline cathode protection remote monitoring system includes a pipeline 1, a polarization probe 2, a wireless GPRS detector 3, and a first magnesium sacrificial anode 11, where the pipeline 1, the polarization probe 2, and the first magnesium sacrificial anode 11 are connected to the wireless GPRS detector 3 through wires;
the wireless GPRS detector 3 acquires signal data such as output current, open-circuit potential, electrified potential, natural potential, outage current potential and the like of the pipeline 1, the polarization probe 2 and the first magnesium sacrificial anode 11 and transmits the signal data to the intelligent early warning platform 4 through a wireless network;
as shown in fig. 1 and fig. 2, a plurality of pipelines 1 are connected by an insulating flange 7, each pipeline 1 is correspondingly provided with a polarization probe 2, the pipeline 1, the polarization probe 2 and a first magnesium sacrificial anode 11 are connected to a wireless GPRS detector 3 by leads, and the wireless GPRS detector 3 acquires signal data of the pipeline 1, the polarization probe 2 and the first magnesium sacrificial anode 11 and transmits the signal data to an intelligent early warning platform 4 by a wireless network;
the key point is that the pipeline 1 is further provided with a shielding device 5, the shielding device 5 comprises a shielding net 51 arranged along the length direction of the pipeline 1, the shielding net 51 is made of a galvanized iron wire net, the shielding net 51 and the pipeline 1 are laid at intervals in parallel, two sides of the shielding net 51 in the length direction are fixedly connected with first soft copper cables 52, the first soft copper cables 52 are further connected through second soft copper cables 53, and the first soft copper cables 52 are connected with second magnesium sacrificial anodes 54; the width of the shielding net 51 is larger than 1.2 times of the diameter of the pipeline 1, the distance between the shielding net 51 and the pipeline 1 is larger than 20cm and smaller than 100cm, and the shielding net 51 is positioned on one side of the pipeline 1 facing the electromagnetic wave interference source.
As shown in fig. 2, if the pipeline 1 is located above the subway 8, the shielding net 51 is disposed below the pipeline 1 between the pipeline 1 and the subway 8.
Wherein, the mesh of the galvanized iron wire net is not more than 5mm so as to avoid influencing the shielding effect.
For places where the interference signal is particularly strong, the galvanized iron wire mesh can be laid in two layers.
Polarizing probe 2 is also known as a reference electrode.
Wherein, polarization probe 2, wireless GPRS detector 3 and intelligent early warning platform 4 all are ripe products, and wireless GPRS detector 3 can adopt the radio potential collection appearance that the energy-conserving scientific and technological company of yitai produced in the Shandong, and intelligent early warning platform 4 acquires wireless GPRS detector 3's signal, shows pipeline 1, polarization probe 2, the signal data of first magnesium sacrificial anode 11 and corresponds the voltage oscillogram on the display screen. The wireless GPRS detection instrument 3 is also called a GPRS wireless potential acquisition instrument or a wireless potential acquisition terminal. Polarization probe 6 is also known as a reference electrode.
The pipe 1 is also connected to a first magnesium sacrificial anode 11, which causes the pipe 1 to generate a negative voltage.
Wherein, the voltage signal of the pipeline 1 is preferably between-0.85V and-1V, and is higher than-0.85V, the cathodic protection effect is weakened, the protection effect can not be achieved, and is less than-1V, the pipeline 1 is easy to displace hydrogen from soil, and the protection layer of the pipeline 1 falls off.
Through foretell structure, at pipeline 1 and subway, high-voltage electricity tower parallel or criss-cross position, set up shielding net 51, shielding net 51 is laid with the parallel interval of pipeline 1, and shielding net 51 sets up in pipeline 1 and is close to one side of subway, high-voltage electricity tower, prevents that the high-voltage cable of subway, high-voltage electricity tower from producing induced voltage and taking place the corruption on pipeline 1.
High-voltage cables of subways and high-voltage electric towers have strong electromagnetic signals, and easily generate induced voltage on a pipeline 1 made of metal materials, and the induced voltage is superposed on a voltage signal of the pipeline 1 and easily exceeds the range from-0.85V to-1V, so that the pipeline 1 is subjected to pitting corrosion.
As shown in fig. 2, the voltage signal of the pipeline 1 generates an induced voltage exceeding a voltage range of-0.85V to-1V due to the interference of the high-iron electromagnetic wave.
In order to facilitate laying of the shielding device 5 and reduce cost, the shielding net 51 is made of a galvanized iron wire net, and compared with a copper net, the cost is lower, but because iron wires are more active than chemical properties of copper wires and have poor conductivity, and corrosion easily occurs in soil, a second magnesium sacrificial anode 54 needs to be connected, corrosion of the galvanized iron wire net is reduced through the cathode protection effect of the second magnesium sacrificial anode 54, and because the conductivity of the iron wire net is extremely poor, voltage attenuation is serious along the length direction of the pipeline 1, a first soft copper cable 52 needs to be arranged, the first soft copper cable 52 is welded with two sides of the galvanized iron wire net, and because the conductivity of copper is strong, voltage attenuation is smaller along the length direction of the pipeline 1, and corrosion of the galvanized iron wire net is more favorably reduced; the first soft copper cables 52 are also connected through the second soft copper cables 53, so that the voltages on two sides of the galvanized wire mesh are relatively balanced, and the corrosion of the galvanized wire mesh is reduced; the second magnesium sacrificial anode 54 can also be replaced by a dc power supply, and the dc power supply applies a negative voltage to the galvanized wire mesh, so that the galvanized wire mesh is protected by a cathode, and corrosion of the galvanized wire mesh is reduced.
The device is characterized by further comprising a monitoring pile 6, wherein at least five detection columns 61 are arranged in the monitoring pile 6, the pipeline 1, the polarization probe 2 and the first magnesium sacrificial anode 11 are connected to the corresponding detection columns 61 through leads, and the corresponding detection columns 61 are connected with the wireless GPRS detector 3.
Monitoring pile 6 includes base 62, and the vertical monitoring section of thick bamboo 63 that is provided with on base 62, the equal opening of upper end and the lower extreme of monitoring section of thick bamboo 63, the opening detachably of monitoring section of thick bamboo 63 upper end is provided with top cap 65, and base 62 is provided with the via hole that the wire passed, and this via hole is just to the opening of monitoring section of thick bamboo 63 lower extreme, and the fixed mounting panel 64 that is provided with in inner chamber of monitoring section of thick bamboo 63 detects post 61 and sets up on mounting panel 64, and base 62, monitoring section of thick bamboo 63.
The mounting plate 64 may also be screwed to the underside of the top cover 65 and then inserted into the monitoring cylinder 63.
The pipeline 1, the polarization probe 2 and the lead of the first magnesium sacrificial anode 11 are led into the monitoring cylinder 63 through the holes, are connected with the corresponding detection column 61, and transmit signals to the wireless GPRS detector 3 through the detection column 61.
The wireless GPRS detector 3 is also arranged in the monitoring cylinder 63; may be secured to the mounting plate 64 by screws.
Preferably, a desiccant bag is arranged in the monitoring cylinder 63, and the desiccant bag is fixedly arranged on the mounting plate 64 and used for adsorbing moisture in the monitoring cylinder 63 and preventing the wireless GPRS detector 3 from being damaged due to overhigh humidity.
The figure is omitted.
Generally, a microprocessor is arranged in the wireless GPRS detector 3, preferably, a DHT11 temperature and humidity sensor is further arranged in the monitoring cylinder 63, the DHT11 temperature and humidity sensor is connected with the microprocessor through a conducting wire, the microprocessor acquires signals of the DHT11 temperature and humidity sensor and wirelessly sends the signals to the intelligent early warning platform 4, when the upper end of the monitoring cylinder 63 is sealed and damaged or other conditions enter rainwater, and humidity is too high, the intelligent early warning platform 4 sends out an alarm signal, and the wireless GPRS detector 3 can be prevented from being damaged or corroded due to too high humidity, and detection is influenced.
The figure is omitted.
The base 62 and the monitoring cylinder 63 are made of glass fiber reinforced plastic materials, and have strong corrosion resistance.
The detection column 61 of the first magnesium sacrificial anode 11 can also be connected with the detection column 61 of the pipeline 1 through a lead, so that the cathode protection effect is realized.
The circumference of the monitoring cylinder 63 is sleeved with a metal shielding cylinder 66, and the metal shielding cylinder 66 is also made of a galvanized wire net and is grounded.
The metal shielding cylinder 66 is sleeved outside the monitoring cylinder 63 close to the subway 8 and the high-voltage tower, and the metal shielding cylinder 66 shields electromagnetic wave signals sent by the subway 8 and the high-voltage tower, so that the electromagnetic wave signals are prevented from generating induced voltage on a lead and influencing the accuracy of voltage signal detection. As shown in fig. 3, the metal shielding cylinder 66 covers the middle and lower part of the circumference of the monitoring cylinder 63 to shield the interference of electromagnetic waves to the conductor part, while the wireless GPRS detection apparatus 3 is located at the upper part of the monitoring cylinder 63, and the antenna of the wireless GPRS detection apparatus 3 is arranged in the top cover 65 or outside the monitoring cylinder 63 and is not affected.
The upper side and the lower side of the shielding net 51 are both provided with anti-seepage layers 55, and the anti-seepage layers 55 at the two sides wrap the shielding net 51.
The shielding net 51 is subject to accelerated corrosion by the rainwater entering the shielding net, and therefore, water permeation prevention layers 55 are provided on both upper and lower sides of the shielding net 51, and the shielding net 51 is wrapped by the water permeation prevention layers 55 on both sides. The corrosion of the immersed rainwater can be reduced and the service life of the shielding net 51 can be prolonged.
The water impermeable layer 55 is a polyethylene film.
The polyethylene film has low cost, a layer of polyethylene film is paved under the shielding net 51, then the shielding net 51 is placed, and then the polyethylene film wraps the shielding net 51, so that the corrosion resistance is improved.
According to the manufacturing requirements of the cathodic protection test piles of the group company, the monitoring pile adopted at this time is made of glass fiber reinforced plastics, the length of the monitoring pile is about 1.3 meters, and the specific shape is shown in figure 3.
Finally, it is noted that: the above list is only the concrete implementation example of the present invention, and of course those skilled in the art can make modifications and variations to the present invention, and if these modifications and variations fall within the scope of the claims of the present invention and their equivalent technology, they should be considered as the protection scope of the present invention.
Claims (6)
1. A gas pipeline cathode protection remote monitoring system comprises a pipeline (1), a polarization probe (2), a wireless GPRS detector (3) and a first magnesium sacrificial anode (11), wherein the pipeline (1), the polarization probe (2) and the first magnesium sacrificial anode (11) are connected to the wireless GPRS detector (3) through leads;
the pipeline is characterized in that the pipeline (1) is further provided with a shielding device (5), the shielding device (5) comprises a shielding net (51) arranged along the length direction of the pipeline (1), the shielding net (51) is made of a galvanized iron wire net, the shielding net (51) and the pipeline (1) are laid at intervals in parallel, two sides of the length direction of the shielding net (51) are fixedly connected with first soft copper cables (52), the first soft copper cables (52) are connected with each other through second soft copper cables (53), and the first soft copper cables (52) are connected with second magnesium sacrificial anodes (54); the width of the shielding net (51) is larger than 1.2 times of the diameter of the pipeline (1), the distance between the shielding net (51) and the pipeline (1) is larger than 20cm and smaller than 100cm, and the shielding net (51) is positioned on one side of the pipeline (1) facing the electromagnetic wave interference source.
2. The gas pipeline cathodic protection remote monitoring system of claim 1, wherein: the device is characterized by further comprising a monitoring pile (6), wherein at least five detection columns (61) are arranged in the monitoring pile (6), the pipeline (1), the polarization probe (2) and the first magnesium sacrificial anode (11) are connected to the corresponding detection columns (61) through wires, and the corresponding detection columns (61) are connected with the wireless GPRS detector (3).
3. The gas pipeline cathodic protection remote monitoring system of claim 2, wherein: monitoring stake (6) include base (62), the vertical monitoring section of thick bamboo (63) that is provided with on base (62), the equal opening of upper end and the lower extreme of monitoring section of thick bamboo (63), the opening detachably of monitoring section of thick bamboo (63) upper end is provided with top cap (65), base (62) are provided with the via hole that the wire passed, this via hole is just to the opening of monitoring section of thick bamboo (63) lower extreme, the fixed mounting panel (64) that is provided with in inner chamber of monitoring section of thick bamboo (63), it sets up on mounting panel (64) to detect post (61), base (62), monitoring section of thick bamboo (63) are made by glass steel.
4. The gas pipeline cathodic protection remote monitoring system of claim 3, wherein: the circumference of monitoring section of thick bamboo (63) overlaps has metallic shield section of thick bamboo (66), and metallic shield section of thick bamboo (66) are made and ground connection by galvanized iron wire net.
5. The gas pipeline cathodic protection remote monitoring system of claim 1, wherein: and the upper side and the lower side of the shielding net (51) are both provided with anti-seepage layers (55), and the anti-seepage layers (55) at the two sides wrap the shielding net (51) therein.
6. The gas pipeline cathodic protection remote monitoring system of claim 5, wherein: the water seepage prevention layer (55) is a polyethylene film.
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| CN202020073624.7U CN210596269U (en) | 2020-01-14 | 2020-01-14 | Gas pipeline cathodic protection remote monitering system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112376052A (en) * | 2020-11-12 | 2021-02-19 | 重庆燃气集团股份有限公司 | Stray current corrosion prevention system for natural gas pipeline and snooping device |
| CN117516815A (en) * | 2023-11-08 | 2024-02-06 | 淄博华润燃气有限公司 | Intelligent line inspection individual operation and guarantee equipment for gas pipe network |
| CN117516815B (en) * | 2023-11-08 | 2024-05-31 | 淄博华润燃气有限公司 | Intelligent line inspection individual operation and guarantee equipment for gas pipe network |
-
2020
- 2020-01-14 CN CN202020073624.7U patent/CN210596269U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112376052A (en) * | 2020-11-12 | 2021-02-19 | 重庆燃气集团股份有限公司 | Stray current corrosion prevention system for natural gas pipeline and snooping device |
| CN112376052B (en) * | 2020-11-12 | 2022-09-13 | 重庆燃气集团股份有限公司 | Natural gas pipeline prevents stray current corrosion system and snooping device |
| CN117516815A (en) * | 2023-11-08 | 2024-02-06 | 淄博华润燃气有限公司 | Intelligent line inspection individual operation and guarantee equipment for gas pipe network |
| CN117516815B (en) * | 2023-11-08 | 2024-05-31 | 淄博华润燃气有限公司 | Intelligent line inspection individual operation and guarantee equipment for gas pipe network |
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