CN213803993U

CN213803993U - Real-time acquisition system for metal pipeline cathode protection

Info

Publication number: CN213803993U
Application number: CN202022228597.9U
Authority: CN
Inventors: 丁清苗; 秦永祥; 史笑雨; 杨志远; 齐廷祥; 周炯
Original assignee: Civil Aviation University of China
Current assignee: Civil Aviation University of China
Priority date: 2020-10-09
Filing date: 2020-10-09
Publication date: 2021-07-27
Anticipated expiration: 2030-10-09

Abstract

A real-time acquisition system for cathodic protection of metal pipelines. The device comprises an anode ground bed, a cathode protection station, a time relay, a metal pipeline, a polarization test piece, a reference electrode, a polarization probe, a patrol instrument, a converter, a PC (personal computer) terminal and a public wiring terminal; the utility model provides a real-time acquisition system for metal pipeline cathodic protection has following advantage: the high-precision acquisition circuit is adopted, the cathodic protection potential parameters of the metal pipeline are acquired and then sent back to the PC terminal in a GPRS remote transmission mode, and managers can check potential data through pipeline cathodic protection potential acquisition management software on the PC terminal, process and store the data, obtain the current protection condition of the protected metal pipeline and provide important basis for protection and evaluation of the metal pipeline. The device is convenient to operate and accurate in measurement result.

Description

Real-time acquisition system for metal pipeline cathode protection

Technical Field

The utility model belongs to the technical field of metal material's cathodic protection, concretely relates to a real-time acquisition system for metal pipeline cathodic protection.

Background

At present, metal pipelines are widely applied to transportation of various materials, such as finished oil, natural gas, drinking water and the like. Because metal pipes are buried underground for long periods of time and the environmental conditions vary widely, corrosion can occur to varying degrees. According to statistical data, the direct economic loss caused by pipeline corrosion in China accounts for about 3% -4% of the net output value of national economy every year. The corrosion, perforation and leakage of the metal pipeline not only can cause oil gas leakage, interrupt transportation and cause huge economic loss, but also easily cause a plurality of safety problems and damage to the environment.

Under the comparatively extensive sight of oil gas pipeline laying, traditional detection methods adopt the artifical mode of patrolling and examining of instrument on-the-spot collection electric potential such as universal meter more, and the inefficiency error is big, can only gather the circular telegram electric potential, and the outage electric potential when unable collection cathodic protection rule judges has caused the error that cathodic protection effect was judged, and has artifical summary data real-time poor, looks over inconvenient scheduling problem.

Disclosure of Invention

In order to solve the above problem, an object of the utility model is to provide a real-time acquisition system for metal pipeline cathodic protection for look over, manage cathodic protection data in real time, evaluate pipeline cathodic protection state.

In order to achieve the above object, the utility model provides a real-time acquisition system for metal pipeline cathodic protection comprises an anode ground bed, a cathodic protection station, a time relay, a metal pipeline, a polarization test piece, a reference electrode, a polarization probe, a patrol instrument, a converter, a PC end and a public terminal; wherein, the anode ground bed, the metal pipeline, the polarization test piece, the reference electrode and the polarization probe are all buried under the ground; one end of the cathode protection station is connected with the anode ground bed, and the other end of the cathode protection station is connected with the metal pipeline; one end of the polarization test piece is connected with the time relay, and the other end of the polarization test piece and the metal pipeline are simultaneously connected with the common wiring terminal; the polarization probe is embedded at the same height of the axis of the metal pipeline, and the outside of the polarization probe is wrapped by an insulating shell; the patrol instrument is respectively connected with the time relay, the reference electrode, the polarization probe and the converter through the measuring channel on the patrol instrument; and the PC end is internally provided with a pipeline cathode protection potential real-time acquisition and analysis system which is connected with the converter.

The time relay is an 8-in 8-out PLC integrated time relay.

The utility model provides a real-time acquisition system for metal pipeline cathodic protection has following advantage:

the high-precision acquisition circuit is adopted, the cathodic protection potential parameters of the metal pipeline are acquired and then sent back to the PC terminal in a GPRS remote transmission mode, and managers can check potential data through pipeline cathodic protection potential acquisition management software on the PC terminal, process and store the data, obtain the current protection condition of the protected metal pipeline and provide important basis for protection and evaluation of the metal pipeline. The device is convenient to operate and accurate in measurement result.

Drawings

Fig. 1 is a schematic structural diagram of a real-time collecting system for cathodic protection of a metal pipeline provided by the present invention.

Fig. 2 is a schematic structural diagram of a time relay in a real-time acquisition system for cathode protection of a metal pipeline provided by the present invention.

Fig. 3 is a schematic structural diagram of a patrol instrument in a real-time acquisition system for metal pipeline cathodic protection provided by the utility model.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-3, the real-time collecting system for metal pipeline cathodic protection provided by the present invention comprises an anode ground bed 2, a cathodic protection station 3, a time relay 4, a metal pipeline 5, a polarization test piece 6, a reference electrode 7, a polarization probe 8, a polling device 9, a converter 10, a PC terminal 11 and a common terminal 12; wherein, the anode ground bed 2, the metal pipeline 5, the polarization test piece 6, the reference electrode 7 and the polarization probe 8 are all buried under the ground 1; one end of the cathode protection station 3 is connected with the anode ground bed 2, the other end is connected with the metal pipeline 5, and through the continuous dissolution and consumption of the anode ground bed 2, protection current is provided for the metal pipeline 5, so that the metal pipeline 5 is protected; one end of the polarization test block 6 is connected with the time relay 4, and the other end of the polarization test block 6 and the metal pipeline 5 are simultaneously connected with the common wiring terminal 12; the polarization probe 8 is buried at the same height of the axis of the metal pipeline 5, the temperature and humidity of the buried soil are required to be similar, the temperature and humidity of the buried soil are close to the corrosion environment closest to the metal pipeline 5, the outside of the metal pipeline is wrapped by an insulating shell, the influence of stray current, secondary current and the like in the external soil on the measurement of the polarization potential of the pipeline is prevented, and therefore the reliability of the measurement result is ensured; the patrol instrument 9 is respectively connected with the time relay 4, the reference electrode 7, the polarization probe 8 and the converter 10 through a measuring channel 13 on the patrol instrument; the PC terminal 11 is provided with a real-time acquisition and analysis system for the cathodic protection potential of the pipeline, connected to the converter 10, and configured to check the cathodic protection data in real time, process and store the data, and obtain the current protection status of the metal pipeline 5.

The time relay 4 is an 8-in 8-out PLC integrated time relay, has logical operation capacity, can be controlled in a programmable mode, is accurate in time control, is provided with a Chinese liquid crystal display and a key, is not required to be connected with a computer, is convenient to operate, and has an encryption function to prevent other people from modifying.

Now will the utility model provides a theory of operation of a real-time collection system for metal pipeline cathodic protection explains as follows:

one end of the cathode protection station 3 is connected with the anode ground bed 2, the other end is connected with the metal pipeline 5, and through the continuous dissolution and consumption of the anode ground bed 2, protection current is provided for the metal pipeline 5, so that the metal pipeline 5 is protected; the time relay 4 with a human-computer interaction interface is adopted, a large amount of experimental measurement is carried out on the polarization time of the polarization test piece 6 under the condition that different metal pipes and different polarization potentials are adopted, so that the polarization of the polarization test piece 6 is complete in the polarization time, the time relay 4 is arranged, the polarization time of the polarization test piece 6 and the metal pipeline 5 can be accurately controlled, and the accurate measurement of the polarization potential of the metal pipeline 5 is ensured; one end of the polarization test piece 6 is connected with the time relay 4, and the other end of the polarization test piece 6 and the metal pipeline 5 are simultaneously connected with the common wiring terminal 12; connecting a terminal of a reference electrode 7 arranged in a polarization probe 8 with a universal meter in series and connecting the terminal with a normally open end, wherein during polarization, a polarization test piece 6 is communicated with a metal pipeline 5, and the polarization of the polarization test piece 6 starts; when the time relay 4 sets the polarization time to finish, the polarization test block 6 is disconnected with the metal pipeline 5 and is connected with the reference electrode 7, the universal meter displays the polarization potential reading, and when the time relay 4 sets the measurement time to finish, the next polarization stage is repeated, and the steps are repeated in this way, so that the polarization potential measurement work of the metal pipeline 5 at each time can be finished; the polarization probe 8 can effectively eliminate potential errors caused by factors such as soil IR drop, stray current and the like, so that the aim of accurately detecting the protective potential value on the metal pipeline 5 is fulfilled; the polarization probe 8 is buried at the same height of the axis of the metal pipeline 5, the temperature and humidity of the buried soil are required to be similar, the temperature and humidity of the buried soil are close to the corrosion environment closest to the metal pipeline 5, the outside of the metal pipeline is wrapped by an insulating shell, the influence of stray current, secondary current and the like in the external soil on the measurement of the polarization potential of the pipeline is prevented, and therefore the reliability of the measurement result is ensured; the patrol instrument 9 is respectively connected with the time relay 4, the reference electrode 7, the polarization probe 8 and the converter 10 through a measuring channel 13 on the patrol instrument; the PC terminal 11 is provided with a real-time acquisition and analysis system for the cathodic protection potential of the pipeline, connected to the converter 10, and configured to check the cathodic protection data in real time, process and store the data, and obtain the current protection status of the metal pipeline 5.

Claims

1. A real-time acquisition system for cathodic protection of metal pipelines is characterized in that: the real-time acquisition system for metal pipeline cathodic protection comprises an anode ground bed (2), a cathodic protection station (3), a time relay (4), a metal pipeline (5), a polarization test piece (6), a reference electrode (7), a polarization probe (8), a patrol instrument (9), a converter (10), a PC (personal computer) end (11) and a common wiring terminal (12); wherein the anode ground bed (2), the metal pipeline (5), the polarization test piece (6), the reference electrode (7) and the polarization probe (8) are all buried under the ground (1); one end of the cathode protection station (3) is connected with the anode ground bed (2), and the other end is connected with the metal pipeline (5); one end of the polarization test piece (6) is connected with the time relay (4), and the other end of the polarization test piece (6) and the metal pipeline (5) are simultaneously connected with the common wiring terminal (12); the polarization probe (8) is buried at the same height of the axis of the metal pipeline (5), and the outside of the polarization probe is wrapped by an insulating shell; the patrol instrument (9) is respectively connected with the time relay (4), the reference electrode (7), the polarization probe (8) and the converter (10) through a measuring channel (13) on the patrol instrument; the PC end (11) is internally provided with a pipeline cathode protection potential real-time acquisition and analysis system which is connected with the converter (10).

2. The real-time acquisition system for cathodic protection of metal pipelines according to claim 1, characterized in that: the time relay (4) is an 8-in 8-out PLC integrated time relay.