Potential detection device

Abstract

The embodiment of the invention provides a potential detection device which can solve the technical problem that measurement data are not fed back in time when cathode protection is adopted for an oil and gas pipeline. The device is characterized in that a reference connecting wire is connected with a to-be-detected pipeline; the wireless network universal meter is electrically connected with the reference connecting wire and is in communication connection with the terminal equipment, so that data acquired by the wireless network universal meter can be obtained; one end of the pipeline wiring is connected with a to-be-detected pipeline; one end of the polarization switch is electrically connected with the wireless network universal meter, and the other end is electrically connected with the other end of the pipeline wiring; the timer is used for setting on-off time, one end of the timer is connected with the pipeline wiring, the other end of the timer is connected with the wireless network universal meter, and the timer is connected with the polarization switch in parallel; the test piece wiring is connected with a to-be-tested pipeline through the polarization switch. The wireless network multimeter is electrically connected with the reference wire and is in communication connection with the terminal equipment, so that the on-off potential data of the pipeline are measured, and the target of feeding back the field potential data of the pipeline in real time is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of oil and gas pipelines, and in particular to a potential detection device. Background Art

[0002] Corrosion of oil and gas pipelines can cause oil and gas transportation accidents. In order to ensure the safe operation of oil and gas pipelines within their design life, oil and gas pipeline corrosion control has become an urgent problem to be solved. At present, oil and gas pipeline corrosion protection can be achieved through cathodic protection. In order to detect the effectiveness of cathodic protection, it is necessary to monitor the on-off potential of the oil and gas pipeline.

[0003] However, in the related art, the test pile cannot change the measurement position at will, and the constant potentiostat cannot be turned on and off synchronously due to the influence of upstream and downstream, resulting in the inability to timely feedback the pipeline field potential data. Summary of the invention

[0004] The embodiment of the present application provides a potential detection device, which can solve the technical problem of untimely feedback of measurement data when cathodic protection is adopted for oil and gas pipelines.

[0005] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a potential detection device, which includes: a reference wiring, a wireless network multimeter, a pipeline wiring, a polarization switch, a timer and a test piece wiring; the reference wiring is connected to the pipeline to be tested; the wireless network multimeter is electrically connected to the reference wiring; and the wireless network multimeter includes a distribution network sensor, and the spacing between the distribution network sensor and the terminal device is a first distance, so that the wireless network multimeter and the terminal device are communicatively connected, and the communication connection is used to obtain data collected by the wireless network multimeter; one end of the pipeline wiring is connected to the pipeline to be tested; one end of the polarization switch is electrically connected to the wireless network multimeter, and the other end is electrically connected to the other end of the pipeline wiring; a timer, used to set the on-off time, one end is connected to the pipeline wiring, and the other end is connected to the wireless network multimeter, and the timer and the polarization switch are connected in parallel; the test piece wiring is connected to the pipeline to be tested through the polarization switch.

[0007] Based on the above description of the potential detection device provided in the embodiment of the present application, it can be known that the potential detection device includes connecting the test piece wiring to the pipeline to be tested through a polarization switch. When the polarization switch is connected, the test piece is polarized. When the test piece is fully polarized, the polarization switch is disconnected. Press the switch button of the timer to perform an on-off test of the online pipeline to be tested, and measure the pipeline on-off potential data through the wireless network multimeter and the reference wiring electrical connection, as well as the communication connection with the terminal device, so as to achieve the goal of real-time feedback of the pipeline field potential data. In this way, the accuracy of the measurement is improved by polarization.

[0008] In addition, the potential detection device has a simple structure, easy disassembly and assembly of parts, light weight, low cost, and is affordable and suitable for various environments, which is conducive to the popularization of sites and solves the problem of power-off potential testing in various locations.

[0009] In a feasible implementation of the first aspect, the potential detection device further includes: a storage unit and a display unit; the storage unit is electrically connected to the wireless network multimeter; and the display unit is electrically connected to the storage unit.

[0010] In a feasible implementation of the first aspect, the potential detection device further includes: a housing; a reference connection, a wireless network multimeter, a pipeline connection, a polarization switch, a timer and a test piece connection are all arranged on the housing.

[0011] In a feasible implementation of the first aspect, the casing includes an upper cover and a lower cover; a waterproof strip is arranged between the upper cover and the lower cover; a press-type buckle is arranged on the upper cover or the lower cover; and a manual air valve is arranged on the upper cover.

[0012] In a feasible implementation of the first aspect, the potential detection device further includes: an identification code for a user to scan and add a wireless network multimeter.

[0013] In a feasible implementation manner of the first aspect, the potential detection device further includes: a communication unit, and the communication unit is used to connect the wireless network multimeter and the display unit.

[0014] In a feasible implementation of the first aspect, the display unit includes: a data display interface, a status display interface, a remote operation interface and a chart display interface; the data display interface, the status display interface, the remote operation interface and the chart display interface are arranged in sequence from top to bottom.

[0015] In a feasible implementation of the first aspect, the potential detection device further includes: a continuity test module; the continuity test module is used to perform a continuity test on the pipeline to be tested based on a timer.

[0016] In a feasible implementation of the first aspect, the potential detection device further includes: a charging port for connecting an energy supply device to supply power to the potential detection device.

[0017] In a second aspect, an embodiment of the present application provides a potential detection method, which includes: connecting a reference wiring to a pipeline to be tested; electrically connecting a wireless network multimeter to the reference wiring; connecting one end of the pipeline wiring to the pipeline to be tested; electrically connecting one end of a polarization switch to the wireless network multimeter, and the other end to the other end of the pipeline wiring; connecting one end of a timer to the pipeline wiring, and the other end to the wireless network multimeter, and the timer and the polarization switch are connected in parallel; connecting a test piece wiring to the pipeline to be tested through the polarization switch; when the polarization switch is connected, polarizing the test piece; when the test piece is fully polarized, disconnecting the polarization switch.

[0018] The potential detection method connects the test piece wiring to the pipeline to be tested through a polarization switch. When the polarization switch is connected, the test piece is polarized. When the test piece is fully polarized, the polarization switch is disconnected. Press the switch button of the timer to perform an on-off test of the online pipeline to be tested, and measure the pipeline on and off potential data. In this way, the accuracy of the measurement is improved by polarization. In addition, the potential detection device has a simple structure, easy disassembly and assembly of parts, light weight, low cost, and is affordable. It is suitable for various environments, is conducive to the popularization of stations, and solves the problem of power-off potential testing in various locations. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a potential detection device provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the structure of a timer in a potential detection device provided in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of the structure of a potential detection device provided in an embodiment of the present application;

[0022] Figure 4 A schematic diagram of the structure of a potential detection device provided in an embodiment of the present application;

[0023] Figure 5 A schematic diagram of a download code for a mobile phone application in a potential detection device provided in an embodiment of the present application;

[0024] Figure 6 A schematic diagram of the home page of a mobile phone application in a potential detection device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described below in conjunction with the accompanying drawings in the embodiments of the present invention. In the description of the embodiments of the present invention, unless otherwise specified, "multiple" refers to two or more than two. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0026] In addition, in order to facilitate the clear description of the technical solutions of the embodiments of the present invention, in the embodiments of the present invention, the words "first", "second" and the like are used to distinguish the same items or similar items with substantially the same functions and effects. Those skilled in the art will understand that the words "first", "second" and the like do not limit the quantity and execution order, and the words "first", "second" and the like do not necessarily limit the difference. At the same time, in the embodiments of the present invention, the words "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or design. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete way for easy understanding.

[0027] The principles and features of the present application are described below. The examples given are only used to explain the present application and are not used to limit the scope of the present application.

[0028] The present application provides a potential detection device that can be applied to long-distance oil and gas pipelines and used to measure the potential when the pipeline is powered on and off. In some embodiments, it can be used to measure and monitor the potential of a pipeline protected by a forced current cathodic protection.

[0029] In some embodiments, the potential detection device provided in the embodiments of the present application includes a sensor that can directly display the measured value. Exemplarily, the sensor can be a negative temperature coefficient (NTC) thermistor temperature sensor, such as NTC-103KF-3950, model 103KF, 3950 means that the thermistor temperature coefficient at 25 degrees Celsius is 3950ppm / ℃. NTC-103KF-3435, its thermistor temperature coefficient is 3435ppm / ℃. The sensor can also be a platinum resistance temperature sensor, such as PT100, whose resistance is 100 ohms at 0 degrees Celsius. PT200, whose resistance is 200 ohms at 0 degrees Celsius. PT1000, whose resistance is 1000 ohms at 0 degrees Celsius, has a higher sensitivity than PT100.

[0030] In some embodiments, the potential detection device provided in the embodiments of the present application includes a universal transmitter. For example, the mobile phone can convert the standard signal into a measurement value of another unit, supporting, for example, 0-5V, 1-5V, 0-10mA, 0-20mA, 4-20mA.

[0031] In some embodiments, the potential detection device provided in the embodiments of the present application can realize the sharing of measurement values. For example, by tapping a single data item in the data list, the data item can be copied to the clipboard and quickly pasted into other chat tools to share with others.

[0032] In the cathodic protection system, the on-off potentia l test is an important method to evaluate the effectiveness of cathodic protection. By measuring the potential difference of the pipeline when the cathodic protection current is energized and de-energized, the effectiveness and protection level of the cathodic protection system can be judged. When the cathodic protection current is disconnected instantly, the pipeline potential will respond quickly and reflect the true protection potential. When the power is on, the potential on the pipeline surface includes the potential drop caused by the current flow. At the moment of power off, the potential eliminates this effect and is closer to the potential of the pipeline under natural corrosion conditions.

[0033] Figure 1 This is a schematic diagram of the structure of a potential detection device provided in an embodiment of the present application. Figure 1 As shown, in some embodiments, the potential detection device includes a reference wiring 101, a wireless network multimeter 102, a pipeline wiring 103, a polarization switch 104, a timer 105 and a test strip wiring 106. The reference wiring 101 is connected to the pipeline to be tested. The wireless network multimeter 102 is electrically connected to the reference wiring 101, and is connected to the terminal device 300 for communication to obtain data collected by the wireless network multimeter 102. One end of the pipeline wiring 103 is connected to the pipeline to be tested. One end of the polarization switch 104 is electrically connected to the wireless network multimeter 102, and the other end is electrically connected to the other end of the pipeline wiring 103. The timer 105 is connected to the pipeline wiring 103 at one end and to the wireless network multimeter 102 at the other end, and the timer 105 and the polarization switch 104 are connected in parallel. The test strip wiring 106 is connected to the pipeline to be tested through the polarization switch 104.

[0034] The wireless network (WiFi) multimeter 102 can realize online potential monitoring and can be a WiFi smart multimeter. The wireless network multimeter 102 includes a potential probe. In one implementation, a 1 square centimeter potential probe is buried.

[0035] Furthermore, the wireless network multimeter 102 includes a network distribution sensor, and the distance between the network distribution sensor and the terminal device 300 is a first distance, so that the wireless network multimeter 102 and the terminal device 300 are communicatively connected, and the communication connection is used for the terminal device 300 to obtain data collected by the wireless network multimeter 102.

[0036] The terminal device 300 may be a mobile phone. For example, when the wireless network multimeter 102 is in communication connection with the terminal device 300, the network configuration sensor of the wireless network multimeter 102 is close to the mobile phone screen area. The network configuration sensor is kept in close contact with the mobile phone screen.

[0037] In some embodiments, the cloud storage function of the WiFi smart multimeter is used to compare and analyze the data, thereby analyzing the effect of pipeline protection. In one implementation, the WiFi smart multimeter is turned on by pressing the start button of the WiFi smart multimeter for more than 3 seconds.

[0038] The polarization switch 104 is used to achieve polarization. In some embodiments, after the electrical connection of each component is completed, the polarization switch 104 is turned to the "closed" state to start polarization. In one implementation, the polarization time is twenty minutes.

[0039] It is understandable that by setting the polarization switch, the polarization of the test piece is accelerated, the test time is shortened, and the power-off potential can be measured quickly with a measurement error of ±0.01%. In some scenarios, the measurement error is controlled within 0.001v.

[0040] The timer 105 is used to set the required time nodes for coordination of on and off. Figure 2 This is a schematic diagram of the structure of a timer in a potential detection device provided in an embodiment of the present application. Figure 2 As shown, in one implementation, setting the required time node includes the following steps:

[0041] S1, press the "C" key to reset, the display shows "0:00 00" and flashes. Press the "seconds", "hours" and "minutes" keys to set the countdown time for power on.

[0042] Exemplarily, the countdown time for power-on can be set to 12 seconds or 4 seconds.

[0043] S2, press the "Set" button, then press the "Seconds", "Hours" and "Minutes" buttons respectively to set the countdown closing time.

[0044] Exemplarily, when the countdown time for power on is set to 12 seconds, the countdown time for power off is set to 3 seconds.

[0045] Exemplarily, when the countdown time for power on is set to 4 seconds, the countdown time for power off is set to 1 second.

[0046] S3, press the "Start / Reset" key.

[0047] After executing step S3, the countdown starts and the circuit works in a cycle of "on-off-on" state.

[0048] It is understandable that executing step S1, step S2 and step S3 can realize cyclic control. Executing only step S1 and step S3 can realize single control. In some embodiments, the potential detection device further includes: a continuity test module 110. The continuity test module 110 is used to perform continuity test on the pipeline to be tested based on the timer 105.

[0049] Before the test, the test piece connection 106 is connected to the pipeline to be tested through the polarization switch 104. When the polarization switch 104 is connected, the test piece is polarized. When the test piece is completely polarized, the polarization switch 104 is disconnected. The switch button of the timer 105 is pressed to perform an on-off test of the pipeline to be tested online, and the pipeline on-off potential data is measured.

[0050] Figure 3 A schematic diagram of the structure of a potential detection device provided in an embodiment of the present application. Figure 4 This is a schematic diagram of the structure of a potential detection device provided in an embodiment of the present application. Figure 3 and Figure 4 As shown, in some embodiments, the potential detection device also includes: a storage unit 107 and a display unit 108. The storage unit 107 is electrically connected to the wireless network multimeter 102. In this way, the potential detection device can complete the storage of test data without an external network and a mobile phone hotspot. The display unit 108 is electrically connected to the storage unit 107. In this way, the potential detection device can display data on site. In one implementation, the display unit 108 includes a data display interface 108a, a status display interface 108b, a remote operation interface 108c, and a chart display interface 108d. The data display interface 108a, the status display interface 108b, the remote operation interface 108c, and the chart display interface 108d are arranged in sequence from top to bottom.

[0051] In order to transfer the data of the storage unit to the display unit, in some embodiments, the potential detection device further includes: a communication unit, which is used to connect the wireless network multimeter 102 and the display unit 108. There are many feasible implementations of the communication unit, such as Bluetooth, wireless network (Wi-Fi), cellular network, etc.

[0052] like Figure 4 As shown, in some embodiments, the display unit 108 can be carried by a terminal device, such as a mobile phone. For example, a mobile phone APP can be set on the mobile phone, and the mobile phone APP serves as the display unit 108. Various functional operations can be completed through the operation interface of the APP, such as performance parameter setting and data display. It can be understood that the mobile phone APP not only provides an interface for users to interact with the device, but also serves as a configuration tool and control center for the device, responsible for the initial configuration, management and remote operation of the device.

[0053] In some embodiments, the potential detection device provided in the embodiments of the present application can realize communication connection with multiple clients. For example, an Apple operating system (iPhone Operating System, IOS) client, an Android operating system (Android) client, and a personal computer (PC) desktop client. It is understandable that the display unit 108 can be set in multiple ways, that is, the same wireless network multimeter 102 is bound to multiple mobile phones, or the same mobile phone is bound to multiple wireless network multimeters 102, so that they have stronger operational compatibility and convenience.

[0054] like Figure 4 As shown, in some embodiments, when there is an external network or mobile phone hotspot on site, the cloud storage function of the color screen smart multimeter is used to compare and analyze the data, thereby analyzing the pipeline cathodic protection effect. When there is no external network or mobile phone hotspot, the data is stored in the memory card.

[0055] The following is a feasible implementation method for connecting a mobile phone and a multimeter. The connection between a mobile phone and a multimeter includes the following steps:

[0056] S11, download the mobile APP.

[0057] Figure 5 This is a schematic diagram of a download code for a mobile phone application in a potential detection device provided in an embodiment of the present application. Figure 5 As shown, in some embodiments, different types of clients have different download codes for their mobile APPs.

[0058] S12, register and log in to the APP.

[0059] Figure 6 This is a schematic diagram of the home page of a mobile phone application in a potential detection device provided in an embodiment of the present application. Figure 6 As shown, in some embodiments, after opening the APP, register an account, log in to the account, and enter the homepage.

[0060] S13, open the device QR code and scan it to add the device.

[0061] In one implementation, when executing step S13, the following steps are also included:

[0062] S131, when the device is powered off, press and hold the power button for 2 seconds to power it on.

[0063] After booting up, you will enter the function selection page.

[0064] S132, press the knob to enter the measurement page, press the button again to enter the menu page, and rotate the knob to select "Device Information".

[0065] S133, press the knob to enter the device information page.

[0066] The device information page displays the device QR code, which is the device QR code of the multimeter. It can be understood that each multimeter corresponds to a unique identification code.

[0067] S14, scan and add the device using the mobile APP.

[0068] In one implementation, when executing step S14, the following steps are also included:

[0069] S141, click on the mobile APP Figure 6 Click the device list icon shown to open the left sidebar.

[0070] S142, click the “Add Device” button.

[0071] The camera opens.

[0072] S143, aim the mobile phone camera at the QR code on the device screen.

[0073] After scanning the code successfully, you will be prompted whether to add the device. Click "Confirm" to add it successfully.

[0074] S15, the device is connected to the router.

[0075] In one implementation, when executing step S15, the following steps are also included:

[0076] S151, enter the WI FI name and password on the APP network configuration page.

[0077] S152, press and hold the button of the multimeter for more than 3 seconds to turn it on.

[0078] S153, move the network sensor of the multimeter close to the black area of ​​the mobile phone screen. S154, click the start transfer button of the APP.

[0079] S155, keep the network sensor close to the mobile phone screen.

[0080] S156, until the screen stops flashing, the transmission is completed.

[0081] S157, the multimeter buzzer beeps briefly, and the connection to the router begins.

[0082] In one implementation, if a mobile phone hotspot is used as a network, the mobile phone AP frequency band should be set to the 2.4 GHz frequency band.

[0083] In the absence of an external network, turn on the mobile phone hotspot, press the power switch of the smart multimeter, and after automatic connection, you can observe the power-on potential value. After polarization is completed, turn the polarization switch to the "off" state, press the timer start button, and the equipment automatically starts testing. You can use the mobile phone to view the pipeline on or off potential in real time, and perform gear switching and other functions on the mobile phone.

[0084] In addition, mobile phone hotspots can be used to measure and store data. Data can be stored in mobile phones in the form of Excel tables, and online metadata storage displays can be divided into digital graphs, data graphs, waveform graphs, bar graphs, etc., which are convenient for data observation and comparison.

[0085] like Figure 3 As shown, in some embodiments, the potential detection device further includes: a housing 109 . The reference wiring 101 , the wireless network multimeter 102 , the pipeline wiring 103 , the polarization switch 104 , the timer 105 and the test piece wiring 106 are all arranged on the housing 109 .

[0086] like Figure 3 As shown, in some embodiments, the housing 109 includes an upper cover 109a and a lower cover 109b. A waterproof strip is provided between the upper cover 109a and the lower cover 109b. A press-type buckle is provided on the upper cover 109a or the lower cover 109b. Therefore, a manual air valve is provided on the upper cover 109a.

[0087] In one implementation, the length and width dimensions of the potential detection device are 180 mm*120 mm.

[0088] The potential detection device provided in the embodiment of the present application realizes the on-site pipeline potential and off-voltage testing. The potential detection device has a simple structure, convenient assembly and disassembly of parts, light weight, low cost, and is suitable for various environments, which is conducive to the popularization of stations and solves the problem of power-off potential testing in various locations.

[0089] In some embodiments, the potential detection device further includes: a charging port for connecting an energy supply device to supply power to the potential detection device.

[0090] The potential detection device provided in the embodiment of the present application develops and utilizes the Internet of Things and cloud storage functions. In an external network or mobile phone hotspot environment, the device can be remotely monitored, operated and stored in a cloud storage service through a mobile phone APP. Not only that, in order to improve the polarization efficiency, the device is also provided with a polarization switch to manually interfere with the polarization time of the test piece, thereby greatly reducing the error of data collection during operation. The device casing is provided with a press-type buckle, a waterproof strip on the upper cover and a manual air valve, and the waterproof level reaches IP67. Due to the setting of the air valve, it can be opened normally under special high and low pressure environments. Therefore, this device is suitable for various complex and harsh environments.

[0091] The present application also provides a potential detection method, including:

[0092] S01, connect the reference wiring 101 to the pipeline to be tested.

[0093] The reference wiring is connected to the portable reference, and the test piece wiring is connected to the test piece.

[0094] S02, electrically connecting the wireless network multimeter 102 to the reference wiring 101.

[0095] S03, connecting one end of the pipeline connection 103 to the pipeline to be tested.

[0096] S04, electrically connect one end of the polarization switch 104 to the wireless network multimeter 102, and the other end to the other end of the pipeline connection 103.

[0097] S05, one end of the timer 105 is connected to the pipeline connection 103, and the other end is connected to the wireless network multimeter 102, and the timer 105 and the polarization switch 104 are connected in parallel.

[0098] S06, connecting the test piece wiring to the pipeline to be tested through the polarization switch; when the polarization switch is connected, polarizing the test piece; when the test piece is completely polarized, disconnecting the polarization switch.

[0099] In some embodiments, the potential detection method further includes setting a test potential alarm threshold. In one implementation, upper and lower threshold potentials may be set. When the potential exceeds the test potential alarm threshold, the potential detection device issues an alarm and pushes the alarm content to an email address. Exemplarily, a maximum of twenty alarm messages are pushed daily.

[0100] Through on-site measurement and data comparison of fifteen test piles, the potential detection device can achieve the effects of simple operation, portability, and potential on and off testing.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

[0102] In addition, it is clear that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices stated in a device claim can also be implemented by one unit or device through software or hardware. The words first, second, etc. are used to indicate names, and do not indicate any particular order.

Claims

1. A potential detection device, characterized in that: include: Reference wiring, connected to the pipeline to be tested; A wireless network multimeter is electrically connected to the reference wiring; and the wireless network multimeter includes a network distribution sensor, and the distance between the network distribution sensor and the terminal device is a first distance, so that the wireless network multimeter is communicatively connected to the terminal device, and the communication connection is used to obtain data collected by the wireless network multimeter; A pipeline connection, one end of which is connected to the pipeline to be tested; a polarization switch, one end of which is electrically connected to the wireless network multimeter and the other end of which is electrically connected to the other end of the pipeline wiring; A timer, used for setting the on and off time, one end of which is connected to the pipeline wiring, and the other end is connected to the wireless network multimeter, and the timer and the polarization switch are connected in parallel; The test piece is connected to the pipeline to be tested through the polarization switch.

2. The potential detection device according to claim 1, characterized in that: The potential detection device further includes: a storage unit and a display unit; The storage unit is electrically connected to the wireless network multimeter; The display unit is electrically connected to the storage unit.

3. The potential detection device according to claim 1 or 2, characterized in that: The potential detection device further comprises: a housing; The reference wiring, the wireless network multimeter, the pipeline wiring, the polarization switch, the timer and the test piece wiring are all arranged on the housing.

4. The potential detection device according to claim 3, characterized in that: The housing comprises an upper cover and a lower cover; A waterproof strip is provided between the upper cover and the lower cover; The upper cover or the lower cover is provided with a press-type buckle; The upper cover is provided with a manual gas valve.

5. The potential detection device according to claim 2, characterized in that: The potential detection device also includes: The identification code is used for the user to scan and add the wireless network multimeter.

6. The potential detection device according to claim 5, characterized in that: The potential detection device also includes: A communication unit is used to connect the wireless network multimeter and the display unit.

7. The potential detection device according to claim 5 or 6, characterized in that: The display unit includes: a data display interface, a status display interface, a remote operation interface and a chart display interface; the data display interface, the status display interface, the remote operation interface and the chart display interface are arranged in sequence from top to bottom.

8. The potential detection device according to claim 1 or 2, characterized in that: The potential detection device further comprises: an on-off test module; The continuity test module is used to perform a continuity test on the pipeline to be tested based on the timer.

9. The potential detection device according to claim 1 or 2, characterized in that: The potential detection device also includes: The charging port is used to connect an energy supply device to supply power to the potential detection device.

10. A potential detection method, characterized in that: include: Connect the reference wiring to the pipe to be tested; electrically connecting the wireless network multimeter to the reference wiring; Connect one end of the pipeline connection to the pipeline to be tested; One end of the polarization switch is electrically connected to the wireless network multimeter, and the other end is electrically connected to the other end of the pipeline wiring; Connect one end of the timer to the pipeline wiring, and the other end to the wireless network multimeter, and connect the timer and the polarization switch in parallel; The test piece wiring is connected to the pipeline to be tested through the polarization switch; when the polarization switch is connected, the test piece is polarized; when the test piece is completely polarized, the polarization switch is disconnected.

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