Natural gas nozzle smudginess monitoring device and smudginess monitoring method

Abstract

The invention belongs to the technical field of natural gas metering industry, and discloses a natural gas nozzle smudginess monitoring device and a smudginess monitoring method.The natural gas nozzle smudginess monitoring device is connected with a nozzle pipeline, and a nozzle body is arranged in the nozzle pipeline; the natural gas nozzle smudginess monitoring device comprises a camera, a transmission signal line, a display panel and a control module, the end of the transmission signal line is rotationally connected with the camera so that the camera can selectively stretch into a nozzle pipeline and move in the direction close to or away from a nozzle body, and the end, away from the camera, of the transmission signal line is connected with a control rod. The control module is used for controlling the camera to rotate relative to the transmission signal line; the display panel is connected with the control rod, and the camera, the control rod and the display panel are all in communication connection with the control module. Thus, online monitoring of the nozzle body can be achieved, the monitoring efficiency and safety are improved, and quantification of the monitoring result is facilitated.

Description

Technical Field

[0001] This invention relates to the field of natural gas metering technology, and in particular to a natural gas nozzle dirt monitoring device and dirt monitoring method. Background Technology

[0002] In metrology and calibration stations, flow measurement equipment is one of the infrastructures. As a key flow measurement device, the critical flow venturi nozzle's measurement accuracy directly affects trade settlement, process control, and energy efficiency management. Due to the special characteristics of natural gas, which contains impurities, liquid hydrocarbons, hydrogen sulfide, and other components, the throat of the venturi nozzle is prone to contamination such as carbon buildup, liquid film adhesion, and particulate matter deposition, leading to measurement deviations or even equipment failure.

[0003] To monitor contamination in Venturi nozzles, offline inspection is typically required. This involves venting, purging, and isolating the upstream and downstream pipelines before disassembling the equipment for manual inspection. This method is not only cumbersome and time-consuming, affecting continuous operation of the station, but also carries the risk of natural gas leakage due to pipeline disassembly. Furthermore, while contamination monitoring in related technologies requires visual inspection, the throat of the Venturi nozzle is located deep within the pipeline, making visual observation difficult and hindering the quantitative assessment of contamination levels. It also cannot monitor contamination status in real time without shutting down the system or venting; faults can only be inferred indirectly through flowmeter coefficient drift and differential pressure changes, exhibiting significant latency. Summary of the Invention

[0004] The purpose of this invention is to provide a natural gas nozzle fouling monitoring device and method to solve the problems of low efficiency and poor safety in Venturi nozzle fouling monitoring, and the difficulty in conducting online fouling monitoring and quantitative assessment.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] In a first aspect, a natural gas nozzle contamination monitoring device is provided, connected to a nozzle pipeline, wherein a nozzle body is disposed inside the nozzle pipeline. The natural gas nozzle contamination monitoring device includes: a camera and a transmission signal line, the end of the transmission signal line being rotatably connected to the camera so that the camera can selectively extend into the nozzle pipeline and move in a direction close to or away from the nozzle body; a control rod is connected to the end of the transmission signal line away from the camera for controlling the rotation of the camera relative to the transmission signal line; a display panel and a control module, the display panel being connected to the control rod; and the camera, the control rod, and the display panel being communicatively connected to the control module.

[0007] Preferably, the transmission signal line includes a connecting part and a monitoring part. One end of the connecting part is connected to the control rod, and the other end is connected to the monitoring part. The end of the monitoring part away from the connecting part is connected to the camera. The extension direction of the connecting part toward the end of the monitoring part is obliquely intersecting the extension direction of the monitoring part.

[0008] Preferably, a temperature sampling port is provided on the nozzle pipe, and the transmission signal line is inserted into the temperature sampling port so that the camera can be moved into the nozzle pipe.

[0009] Preferably, the transmission signal line is connected to a limiting member, which is disposed at the temperature sampling port to limit the relative position of the transmission signal line and the temperature sampling port.

[0010] Preferably, the nozzle pipeline is connected to a temperature transmitter, and the monitoring end of the temperature transmitter is inserted into the temperature acquisition port to monitor the internal temperature of the nozzle pipeline.

[0011] Preferably, the control lever and the display panel are both located outside the nozzle pipeline, and the control lever and the display panel are located on the same side of the temperature transmitter.

[0012] Preferably, the natural gas nozzle contamination monitoring device further includes an alarm element, which is communicatively connected to the control module and is located outside the nozzle pipeline.

[0013] Preferably, the alarm element is an audible alarm; and / or, the alarm element is a luminous alarm.

[0014] Secondly, a method for monitoring contamination, applied to the natural gas nozzle contamination monitoring device described above, wherein a temperature sampling port is provided on the nozzle pipeline, comprising the following steps:

[0015] S1. Confirm and prepare the status of the natural gas nozzle dirt monitoring device before testing;

[0016] S2. Insert one end of the transmission signal line, which is set to the camera, into the nozzle pipeline through the temperature sampling port, and position it in the observation area of ​​the nozzle body;

[0017] S3. Acquire image and video data of the inner wall of the nozzle body through the camera;

[0018] S4. Process image data, identify dirt, and calculate the percentage of dirt coverage area and thickness level;

[0019] S5. Display the comprehensive results and perform threshold comparisons and early warnings;

[0020] S6. Move the camera outside the nozzle pipe and store the data.

[0021] Preferably, the natural gas nozzle contamination monitoring device further includes an alarm element, and the steps of comprehensively displaying the results and performing threshold comparison and early warning further include:

[0022] S51. Set thresholds based on the percentage of area covered by dirt and the thickness level;

[0023] S52. Compare the collected data with the threshold;

[0024] S53. If the collected result exceeds the threshold, the alarm device will sound an alarm.

[0025] The beneficial effects of this invention are:

[0026] A natural gas nozzle contamination monitoring device and method are disclosed. The natural gas nozzle contamination monitoring device is connected to a nozzle pipeline, and a nozzle body is installed inside the nozzle pipeline. The natural gas nozzle contamination monitoring device includes a camera, a transmission signal line, a display panel, and a control module. The end of the transmission signal line is rotatably connected to the camera, so that the camera can selectively extend into the nozzle pipeline and move in a direction close to or away from the nozzle body. The end of the transmission signal line away from the camera is connected to a control rod for controlling the rotation of the camera relative to the transmission signal line. The display panel is connected to the control rod, and the camera, control rod, and display panel are all communicatively connected to the control module.

[0027] In this way, the camera can be moved into the nozzle pipeline without disassembling it, saving the processes of venting, replacement, and isolation, avoiding the risk of natural gas leakage caused by pipeline disassembly, improving monitoring efficiency and safety. The control lever can control the camera to rotate flexibly to expand the monitoring area and achieve comprehensive detection of the nozzle body, making it easier to observe positions that are difficult to see with the naked eye. The acquired images can be calculated and analyzed to form quantitative results, realizing online monitoring of the nozzle body. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a natural gas nozzle dirt monitoring device in one embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the first process of a dirt monitoring method in one embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the second process of a dirt monitoring method in one embodiment of the present invention.

[0031] In the picture:

[0032] 1. Nozzle piping; 11. Nozzle body; 12. Temperature inlet; 13. Temperature transmitter; 2. Camera; 3. Transmission signal line; 31. Control lever; 32. Connecting part; 33. Monitoring part; 4. Display panel. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0034] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0037] Firstly, see Figure 1This invention provides a natural gas nozzle contamination monitoring device, which is connected to a nozzle pipeline 1. A nozzle body 11 is installed inside the nozzle pipeline 1. The natural gas nozzle contamination monitoring device includes a camera 2, a transmission signal line 3, a display panel 4, and a control module (not shown in the figure). The end of the transmission signal line 3 is rotatably connected to the camera 2, so that the camera 2 can selectively extend into the nozzle pipeline 1 and move in a direction close to or away from the nozzle body 11. The end of the transmission signal line 3 away from the camera 2 is connected to a control rod 31, which is used to control the rotation of the camera 2 relative to the transmission signal line 3. The display panel 4 is connected to the control rod 31. The camera 2, the control rod 31, and the display panel 4 are all communicatively connected to the control module.

[0038] In this embodiment, the nozzle pipe 1 has a hollow internal structure, and the nozzle body 11 is disposed inside the nozzle pipe 1 and coaxially disposed with the nozzle pipe 1. The display panel 4 is communicatively connected to the camera 2 so that the images and videos captured by the camera 2 can be displayed on the display panel 4 so that the staff can check the dirt status of the nozzle body 11 in the online state. The control lever 31 is communicatively connected to the camera 2 and can control the left and right rotation of the camera 2 through the transmission signal line 3, thereby improving the field of view. The control module can send the control signal of the control lever 31 to the camera 2 and send the acquisition signal of the camera 2 to the display panel 4.

[0039] In this way, the camera 2 can be moved to the vicinity of the nozzle body 11 without disassembling the nozzle pipeline 1, eliminating the need for venting, replacement, and isolation processes. This not only improves monitoring efficiency but also avoids the risk of natural gas leakage during pipeline disassembly, thus enhancing safety during monitoring. The control rod 31 can control the rotation of the camera 2 to achieve comprehensive inspection of the nozzle body 11, which is beneficial for observing the throat of the nozzle body 11, which is difficult to see with the naked eye. The acquired images can also be calculated and analyzed to form quantitative results, and the internal hollow space of the nozzle pipeline 1 can be used to achieve online monitoring of the nozzle body 11.

[0040] It is understandable that controlling the camera 2, control lever 31 and display panel 4 through the control module is existing technology. The camera 2 can be rotated and connected to the transmission signal line 3 through a structure such as a bushing fitted on the transmission signal line 3, which will not be elaborated here. The camera 2 can be a CCD (Charge Coupled Device) camera, an infrared camera, etc. The type of camera 2 can be adjusted according to actual needs, which will not be listed in detail here.

[0041] See Figure 1In some embodiments, the transmission signal line 3 includes a connecting part 32 and a monitoring part 33. One end of the connecting part 32 is connected to the control rod 31, and the other end is connected to the monitoring part 33. The end of the monitoring part 33 facing away from the connecting part 32 is connected to the camera 2. The extension direction of the connecting part 32 toward the end of the monitoring part 33 is obliquely intersected with the extension direction of the monitoring part 33.

[0042] In this embodiment, the monitoring part 33 is tilted upward at the end opposite to the connecting part 32 (that is, the end where the camera 2 is installed) so as to enter the throat of the nozzle body 11. The connecting part 32 is made of flexible material so as to extend into the nozzle pipe 1.

[0043] In this way, the camera 2 can be moved more accurately to the area to be monitored, improving the monitoring effect. The connecting part 32 can stably extend the monitoring part 33 with the camera 2 into the nozzle pipe 1, and can adapt to different shapes of nozzle pipe 1, avoiding collision with the inner wall of nozzle pipe 1, improving the flexibility of the camera 2 in moving inside nozzle pipe 1, saving the step of disassembling nozzle pipe 1, and improving online monitoring efficiency.

[0044] It is understandable that a connecting rod, a rotating shaft, or other structure that allows the connecting part 32 and the detection part to rotate and connect can also be provided between them, so as to expand the reachable area of ​​the camera 2. The connection method between the connecting part 32 and the detection part can be adjusted according to actual needs, which will not be elaborated here.

[0045] See Figure 1 In some embodiments, a temperature sampling port 12 is provided on the nozzle pipeline 1, and a transmission signal line 3 is inserted into the temperature sampling port 12 so that the camera 2 can be moved into the nozzle pipeline 1.

[0046] In this embodiment, the temperature sampling port 12 is protruding from the side wall of the nozzle pipe 1, and the diameter of the temperature sampling port 12 is larger than the diameter of the camera 2, so that the camera 2 can enter the temperature sampling port 12.

[0047] In this way, by using the existing temperature sampling port 12 on the nozzle pipeline 1 as the insertion channel for the transmission signal line 3 and the camera 2, there is no need to make additional openings, modifications or disassemblies to the nozzle pipeline 1, avoiding the risk of natural gas leakage, saving procedures and costs, improving the installation and monitoring efficiency of the natural gas nozzle dirt monitoring device, and reducing the jamming and damage to the camera 2 during the process of entering the temperature sampling port 12, ensuring that the camera 2 can quickly and accurately enter the interior of the nozzle pipeline 1, realizing accurate online monitoring of the nozzle throat, and improving the safety and ease of operation during the monitoring process.

[0048] It is understandable that the location and number of temperature sampling ports 12 can be adjusted according to actual needs, which will not be elaborated here.

[0049] See Figure 1 In some embodiments, the transmission signal line 3 is connected to a limiting member (not shown in the figure), which is disposed at the temperature sampling port 12 to limit the relative position of the transmission signal line 3 and the temperature sampling port 12.

[0050] In this embodiment, the limiting component is a limiting buckle, which can be engaged with the temperature sampling port 12 so that the camera 2 can stably capture images and videos of the nozzle body 11 after moving to the monitoring area.

[0051] Furthermore, in some embodiments, the transmission signal line 3 is also connected to a seal (not shown in the figure) to make the transmission signal line 3 sealed to the temperature sampling port 12.

[0052] This improves the stability of camera 2, preventing it from shifting away from the monitoring area due to vibration of nozzle pipe 1 or shaking caused by operation. It also improves the continuity and accuracy of image and video acquisition, as well as the accuracy of online monitoring. The seals improve the sealing performance of nozzle pipe 1, preventing natural gas leakage and enhancing the reliability and safety of the natural gas nozzle contamination monitoring device.

[0053] It is understandable that the limiting component can also be a retaining ring whose shape is compatible with the temperature intake port 12, and the sealing component can be a sealing ring, sealant, etc. The specific structure of the limiting component and the sealing component can be adjusted according to actual needs, and will not be listed in detail here.

[0054] See Figure 1 In some embodiments, the nozzle line 1 is connected to a temperature transmitter 13, and the monitoring end of the temperature transmitter 13 is inserted into the temperature sampling port 12 to monitor the internal temperature of the nozzle line 1.

[0055] In this embodiment, the fixed end of the temperature transmitter 13 is located outside the nozzle pipeline 1 to facilitate data reading by the operator. The monitoring end and the detection signal line of the temperature transmitter 13 both pass through the temperature acquisition port 12 and enter the interior of the nozzle pipeline 1. The connection between the temperature transmitter 13 and the temperature acquisition port 12 is sealed and fixed.

[0056] In this way, the temperature transmitter 13 can maintain stable monitoring of the internal temperature of the nozzle pipeline 1 while monitoring the dirt of the nozzle body 11. This saves the steps of venting, replacing and isolating the nozzle pipeline 1, simplifies the monitoring process, facilitates the continuous operation of the station, and avoids the risk of natural gas leakage. The detection end of the temperature transmitter 13 and the transmission signal line 3 are both located at the temperature sampling port 12, which can make full use of the temperature sampling port 12 and the internal space of the nozzle pipeline 1. This allows the temperature transmitter 13 and the natural gas nozzle dirt monitoring device to operate simultaneously, while also reducing interference to the nozzle pipeline 1 and improving the practicality of the natural gas nozzle dirt monitoring device.

[0057] See Figure 1 In some embodiments, the control lever 31 and the display panel 4 are both located outside the nozzle pipeline 1, and the control lever 31 and the display panel 4 are located on the same side of the temperature transmitter 13.

[0058] In this embodiment, the control lever 31, the display panel 4, and the temperature transmitter 13 are all located on the same side of the nozzle pipeline 1, and the control lever 31 and the display panel 4 are located on the side of the temperature transmitter 13 facing the nozzle body 11.

[0059] This reduces assembly interference between the control lever 31, the display panel 4, and the temperature transmitter 13, and facilitates the operation of the display panel 4 and the control lever 31. It also allows operators to complete temperature data reading, dirt detection, and dirt result viewing within the same operating area, simplifying the operation process, improving work efficiency, and optimizing the layout of the equipment on the outside of the nozzle body 11, making the overall structure more compact and saving space.

[0060] It is understandable that the positions of the control lever 31, the display panel 4, and the temperature transmitter 13 can be adjusted according to the position of the temperature input port 12, which will not be elaborated here.

[0061] See Figure 1 In some embodiments, the natural gas nozzle contamination monitoring device further includes an alarm element (not shown in the figure), which is communicatively connected to the control module and is located outside the nozzle pipeline 1; further, in some embodiments, the alarm element is an audible alarm; and / or, the alarm element is a luminous alarm.

[0062] In this embodiment, two alarm devices are provided, one of which is an audible alarm device and the other is a light-emitting alarm device. Both alarm devices are located outside the nozzle pipe 1 so that an alarm signal can be emitted when the detected dirt coverage area ratio and thickness level exceed the set threshold.

[0063] In this way, the control module can send the monitoring data to the alarm device, so that when the monitoring data of dirt exceeds the set threshold, an alarm signal can be issued by sound and / or light, realizing the proactive early warning of excessive dirt, avoiding the continuous accumulation of dirt due to the lack of obvious warning, so that the natural gas nozzle dirt monitoring device can not only realize online monitoring, but also promptly remind the staff to intervene, improving the maintenance efficiency of the nozzle body 11.

[0064] See Figure 2 The present invention also provides a method for monitoring contamination, applied to a natural gas nozzle contamination monitoring device as described in the first aspect, wherein a temperature sampling port 12 is provided on the nozzle pipeline 1, and the method includes the following steps:

[0065] S1. Confirm and prepare the status of the natural gas nozzle dirt monitoring device before testing.

[0066] S2. Insert one end of the transmission signal line 3, which is set to the camera 2, into the nozzle pipe 1 through the temperature sampling port 12, and position it in the observation area of ​​the nozzle body 11.

[0067] S3. Acquire image and video data of the inner wall of the nozzle body 11 through camera 2;

[0068] S4. Process image data, identify dirt, and calculate the percentage of dirt coverage area and thickness level;

[0069] S5. Display the comprehensive results and perform threshold comparisons and early warnings;

[0070] S6. Move camera 2 outside nozzle pipe 1 and store the data.

[0071] In step S1, the lens surface of the camera 2 is cleaned to remove any attached impurities to avoid affecting the imaging effect; the connection between the transmission signal line 3 and the camera 2 and the control rod 31 is checked to ensure that their extension and rotation movements are smooth and without jamming.

[0072] In step S2, hold the control lever 31 and the transmission signal line 3, align the camera 2 with the temperature sampling port 12, adjust the insertion angle and push in the transmission signal line 3 and the camera 2, so that the camera 2 enters the nozzle pipe 1. Operate the control lever 31 to adjust the left and right rotation of the camera 2, and observe the relative position of the camera 2 and the throat of the nozzle body 11 in real time with the image fed back by the display panel 4. Adjust the position until the camera 2 can capture the dirt monitoring area of ​​the throat of the nozzle body 11.

[0073] In step S3, based on the real-time feedback image from the display panel 4, the camera 2 is rotated by operating the control lever 31 and scanned in different areas of the inner wall of the nozzle body 11. Data is collected and stored multiple times for key areas where carbon deposits, liquid film adhesion, and particulate matter deposition are likely to occur.

[0074] In step S4, the control module receives image data transmitted by the camera 2, processes the data, analyzes the type of dirt, the percentage of dirt coverage area, and the thickness level, and sends the analysis results to the display panel 4.

[0075] In step S5, the display panel 4 displays the above image data and analysis results, which makes it easier for staff to check the dirt status and quantitative results of the inner wall of the nozzle body 11. The control module calls the preset dirt coverage area ratio warning threshold and thickness level warning threshold, and compares the real-time calculation results with the preset thresholds one by one. If the real-time calculation results reach or exceed any preset threshold, an warning is issued on the display panel 4.

[0076] In step S6, the transmission signal line 3 is moved to move the camera 2 closer to the temperature sampling port 12, and the camera 2 is taken out from the temperature sampling port 12. The transmission signal line 3 and the camera 2 are then tidied up to complete the retrieval of the camera 2. The control module can store all the image and video data collected during this monitoring process, the calculated data on the percentage of dirt coverage area, the thickness level data, and the corresponding monitoring time information, so that staff can keep them for future reference.

[0077] See Figure 2 and Figure 3 In some embodiments, the natural gas nozzle contamination monitoring device further includes an alarm element. The steps of comprehensively displaying results and performing threshold comparison and early warning also include:

[0078] S51. Set thresholds based on the percentage of area covered by dirt and the thickness level;

[0079] S52. Compare the collected data with the threshold;

[0080] S53. If the collected results exceed the threshold, the alarm device will sound an alarm.

[0081] In step S51, based on the metering accuracy requirements of the nozzle body 11, the characteristics of the natural gas medium, and the station operating conditions, the warning thresholds for the proportion of dirt coverage area and thickness level are determined. After confirming the threshold setting, the control module automatically stores the threshold parameter to form the judgment standard for subsequent threshold comparison, and displays the set threshold information on the display panel 4 simultaneously for easy verification and confirmation by staff.

[0082] In step S52, the control module retrieves the stored preset warning threshold for the proportion of dirt coverage area and the warning threshold for the thickness level, and extracts the real-time data of the proportion of dirt coverage area and the real-time data of the thickness level calculated in this monitoring. The real-time data of the proportion of dirt coverage area and the warning threshold for the proportion of dirt coverage area are compared, and the real-time data of the thickness level and the warning threshold for the thickness level are compared.

[0083] In step S53, after the control module receives and confirms that the collected structure exceeds the preset threshold, it immediately sends an alarm signal to the alarm device. The audible alarm responds to the signal and emits an alarm sound, and the luminous alarm responds to the signal and lights up the alarm light to transmit the alarm information of excessive dirt, until the staff handles the excessive part or resets the alarm device.

[0084] Thus, the camera 2 enters the nozzle pipe 1 through the temperature sampling port 12, enabling dirt monitoring without disassembling the nozzle pipe 1. The control rod 31 controls the rotation of the camera 2, enabling comprehensive detection of the nozzle body 11 and reaching the nozzle throat, which is difficult to see with the naked eye. The camera 2 also obtains image and video information, real-time data on the percentage of dirt coverage area, and real-time data on the thickness level through the display panel 4, thereby improving monitoring efficiency and accuracy and realizing online dirt monitoring.

[0085] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A natural gas nozzle contamination monitoring device, characterized in that, Connected to the nozzle pipeline (1), the nozzle pipeline (1) contains a nozzle body (11), and the natural gas nozzle contamination monitoring device includes: A camera (2) and a transmission signal line (3) are provided. The end of the transmission signal line (3) is rotatably connected to the camera (2) so that the camera (2) can selectively extend into the nozzle pipe (1) and move in a direction close to or away from the nozzle body (11). A control rod (31) is connected to the end of the transmission signal line (3) away from the camera (2) for controlling the camera (2) to rotate relative to the transmission signal line (3). The display panel (4) and the control module are connected. The display panel (4) is connected to the control lever (31). The camera (2), the control lever (31) and the display panel (4) are all communicatively connected to the control module.

2. The natural gas nozzle fouling monitoring device according to claim 1, characterized in that, The transmission signal line (3) includes a connecting part (32) and a monitoring part (33). One end of the connecting part (32) is connected to the control rod (31), and the other end is connected to the monitoring part (33). The end of the monitoring part (33) away from the connecting part (32) is connected to the camera (2). The extension direction of the connecting part (32) toward the end of the monitoring part (33) is obliquely intersecting the extension direction of the monitoring part (33).

3. The natural gas nozzle fouling monitoring device according to claim 1, characterized in that, A temperature sampling port (12) is provided on the nozzle pipeline (1), and the transmission signal line (3) is inserted into the temperature sampling port (12) so that the camera (2) can be moved into the nozzle pipeline (1).

4. The natural gas nozzle fouling monitoring device according to claim 3, characterized in that, The transmission signal line (3) is connected to a limiting member, which is located at the temperature sampling port (12) to limit the relative position of the transmission signal line (3) and the temperature sampling port (12).

5. The natural gas nozzle fouling monitoring device according to claim 3, characterized in that, The nozzle pipeline (1) is connected to a temperature transmitter (13), and the monitoring end of the temperature transmitter (13) is inserted into the temperature sampling port (12) to monitor the internal temperature of the nozzle pipeline (1).

6. The natural gas nozzle contamination monitoring device according to claim 5, characterized in that, The control lever (31) and the display panel (4) are both located outside the nozzle pipeline (1), and the control lever (31) and the display panel (4) are located on the same side of the temperature transmitter (13).

7. The natural gas nozzle fouling monitoring device according to claim 1, characterized in that, The natural gas nozzle contamination monitoring device also includes an alarm component, which is communicatively connected to the control module and is located outside the nozzle pipeline (1).

8. The natural gas nozzle fouling monitoring device according to claim 7, characterized in that, The alarm device is an audible alarm; and / or, the alarm device is a luminous alarm.

9. A method for monitoring contamination, applied to a natural gas nozzle contamination monitoring device as described in any one of claims 1-8, wherein a temperature sampling port (12) is provided on the nozzle pipeline (1), characterized in that, Includes the following steps: S1. Confirm and prepare the status of the natural gas nozzle dirt monitoring device before testing; S2. Insert one end of the transmission signal line (3) of the camera (2) into the nozzle pipeline (1) through the temperature sampling port (12) and position it in the observation area of ​​the nozzle body (11); S3. Acquire image and video data of the inner wall of the nozzle body (11) through the camera (2); S4. Process image data, identify dirt, and calculate the percentage of dirt coverage area and thickness level; S5. Display the comprehensive results and perform threshold comparisons and early warnings; S6. Move the camera (2) to the outside of the nozzle pipe (1) and store the data.

10. The method for monitoring dirt and grime according to claim 9, characterized in that, The natural gas nozzle contamination monitoring device also includes an alarm component, and the steps of comprehensively displaying the results and performing threshold comparison and early warning further include: S51. Set thresholds based on the percentage of area covered by dirt and the thickness level; S52. Compare the collected data with the threshold; S53. If the collected result exceeds the threshold, the alarm device will sound an alarm.

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