A sacrificial anode inspection device

Abstract

A kind of sacrificial anode detection device, including protective shell, voltage acquisition device, UPS, printer, touch screen, line wheel and reference electrode protection structure, voltage acquisition device, UPS and printer are fixedly installed in protective shell interior, touch screen and line wheel are fixedly connected with protective shell panel and outside respectively by support;UPS output end is electrically connected with voltage acquisition device, printer, touch screen respectively by wire;Voltage acquisition device includes voltage acquisition transmission module, positive and negative electrode interface and first communication interface, positive and negative electrode interface extends to protective shell panel, first communication interface is connected with touch screen signal, and transmission module interior is equipped with temperature sensor installation groove;Reference electrode protection structure includes shell, and water hole is opened to the side wall of shell.The utility model is used to solve offshore wind power field detection operation portability insufficient, the problem that detection data management efficiency is low and reliability is poor.

Description

Technical Field

[0001] This utility model relates to a sacrificial anode detection device. Background Technology

[0002] Offshore wind farm substation platforms and turbines are exposed to the unique marine environment with high salt spray concentration and high air humidity for extended periods. Seawater and salt spray continuously corrode the steel structure of the equipment, leading to severe corrosion and hydrogen embrittlement of the metal structure. It can also cause paint blistering and peeling, damaging the equipment's anti-corrosion barrier and affecting the mechanical properties of the structural materials, posing a significant threat to the long-term safe and stable operation of wind farm equipment.

[0003] Traditional testing methods for detecting the sacrificial anode potential of offshore wind turbine pile foundations have several drawbacks: maintenance personnel must climb to the wind turbine at a high altitude and carry multiple scattered testing tools, resulting in poor operational convenience; during the testing process, the laying and reeling in of the measuring conductors are entirely manual, which is inefficient and difficult to control precisely; the depth of the reference electrode immersed in seawater cannot be visually determined and can only be estimated based on experience, which can easily lead to deviations in the measurement point; and the test data must be recorded manually in real time, which not only increases the workload but also easily leads to recording errors and data omissions, affecting the accuracy of subsequent data analysis. Utility Model Content

[0004] The purpose of this invention is to provide a sacrificial anode detection device to solve the problems of insufficient portability, low efficiency and poor reliability of on-site detection in offshore wind power.

[0005] To solve the above problems, the technical solution of this utility model is as follows: A sacrificial anode detection device includes a protective housing, a voltage acquisition device, a UPS, a printer, a touch screen, a reel, and a reference electrode. The voltage acquisition device, UPS, and printer are fixedly installed inside the protective housing. The touch screen is set on the panel of the protective housing. The reel is connected to the protective housing through a bracket. The UPS output is electrically connected to the voltage acquisition device, printer, and touch screen via wires. The voltage acquisition device includes a voltage acquisition and transmission module, positive and negative interfaces and a first communication interface. The positive and negative interfaces extend to the protective housing panel, and the first communication interface is connected to the touch screen signal. The transmission module has a temperature sensor mounting slot inside. The printer includes a printing module, a removable paper tray, and a second communication interface. The paper output port of the printing module corresponds to the paper output port of the protective housing panel, and the second communication interface is connected to the touch screen signal. The reel includes a reel body, a hand crank, and an electric drive assembly. The reel body is connected to a bracket via bearings. The hand crank is fixedly connected to one side of the reel body. The electric drive assembly includes a motor and a gear set that is driven by the motor. The gear set is driven by the reel body. The motor is connected to the touch screen control terminal via wires. The reel body is wound with a measuring wire with depth scale.

[0006] Furthermore, the UPS battery mode has a runtime of at least 4 hours, and elastic shock-absorbing rubber pads are fixed between the UPS housing and the inner wall of the protective housing with adhesive.

[0007] Furthermore, the transmitter module has an internal mounting slot. The positive interface of the voltage acquisition device is connected to the alligator clip via a wire. The temperature sensor is installed in the mounting slot, and the output of the temperature sensor is connected to the transmitter module via a wire.

[0008] Furthermore, the printer's paper tray is mounted on the side of the printing module via a snap-fit ​​mechanism, and the printer's paper output outlet is equipped with a dust cover.

[0009] Furthermore, the touchscreen is an industrial-grade touchscreen, with the back mounting bracket connected to the protective housing panel via screws. The touchscreen has a built-in memory chip, which is connected to the touchscreen motherboard via wires.

[0010] Furthermore, the depth scale unit for measuring the surface of the wire wheel is meters, with the smallest scale value being 1 cm.

[0011] Furthermore, the reference electrode is housed within a protective structure, which includes a top cover connected to a conduit. The portion of the reference electrode connected to the measuring lead is housed within the conduit, and sealant is injected into the conduit. A cover is threaded onto the top cover, and the cover has multiple water-permeable holes. A water-permeable mesh is installed inside the cover.

[0012] Furthermore, the protective shell is made of IP67-rated engineering plastic with anti-slip texture on the surface, ventilation holes with dustproof mesh on the side walls, and waterproof strips at the joints.

[0013] The beneficial effects of this utility model are as follows: 1. It has complete data processing and storage functions, can automatically record test data, and has printing and local export functions. The data includes location information and verification code, which facilitates data management, traceability and verification, and greatly reduces the workload and error of manual recording.

[0014] 2. The reel combines manual and electric retrieval functions. The measuring wire is marked, which makes it easy for surveyors to quickly understand the depth of the measuring cable. The electric retrieval function improves the efficiency of reel retrieval and meets the convenience requirements of offshore wind power testing.

[0015] 3. The templates corresponding to the wind farm can be set in advance and imported into the equipment. During testing, the templates can be directly called without repeating parameter settings, which greatly improves the testing efficiency of sacrificial anodes. At the same time, the equipment has a data anomaly alarm function, which can promptly detect abnormal test data.

[0016] 4. A temperature compensation module, a reference electrode protection structure, and an impurity filtering module have been added, which improves the accuracy of voltage acquisition and the measurement precision of the reference electrode, ensuring the reliability of detection data under different temperatures and seawater impurity conditions.

[0017] 5. The equipment has good protective and seismic performance, adopts a protective shell and shock-absorbing buffer components, adapts to the harsh environmental conditions of offshore wind power, extends the service life of the equipment, and reduces the equipment maintenance cost. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a three-dimensional structural diagram of the present invention. Figure 2 This is a cross-sectional structural diagram of the protective structure of this utility model. Figure 3 This is a schematic diagram of the circuit structure of this utility model.

[0019] In the diagram: 1. Hand crank; 2. Negative interface; 3. Heat dissipation hole; 4. Protective housing; 5. Waterproof strip; 6. Printer; 7. Dust cover; 8. Touch screen; 9. Positive interface; 10. UPS; 11. USB interface; 12. Motor; 13. Alligator clip; 14. Gear set; 15. Measuring lead wire; 16. Cover; 17. Bracket; 18. Water-permeable mesh; 19. Reference electrode; 20. Transmitter module; 21. Steel structure; 22. Wheel; 23. Conduit; 24. Storage chip; 25. Temperature sensor. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] A sacrificial anode detection device includes a protective housing 4, a voltage acquisition device, a UPS 10 (uninterruptible power supply device), a printer 6, a touch screen 8, a reel, and a reference electrode 19. The voltage acquisition device, UPS 10, and printer 6 are fixedly installed inside the protective housing 4. The touch screen 8 is set on the panel of the protective housing 4. The reel is connected to the protective housing 4 through a bracket 17. The output of UPS10 is electrically connected to the voltage acquisition device, printer 6, and touch screen 8 via wires, and the charging interface of UPS10 extends to the panel of the protective housing 4. The voltage acquisition device includes a six-and-a-half-digit voltage acquisition and transmission device (model such as AD7799), positive and negative interfaces and a first communication interface. The positive and negative interfaces extend to the protective housing 4 panel. The first communication interface is connected to the touch screen 8 via a signal. The first communication interface is a 485 interface and transmits data to the touch screen 8 through the Modbus RTU protocol. The touch screen 8 is fixed to the panel of the protective housing 4 by the bracket 17, and the back mesh port and USB port extend to the reserved holes on the panel (a waterproof sealing ring is provided at the hole). The printer 6 includes a printing module, a detachable paper tray, and a second communication interface. The paper output port of the printing module corresponds to the paper output port of the protective housing 4 panel. The second communication interface is connected to the touch screen 8 via a signal. The second communication interface is an RS232 communication interface, which enables signal transmission between the printer 6 and the touch screen 8. The reel includes a reel body 22, a hand crank 1, and an electric drive assembly. The reel body 22 is connected to a bracket 17 via a bearing. The hand crank 1 is fixedly connected to one side of the reel body 22. The electric drive assembly includes a motor 12 and a gear set 14 that is driven by the motor 12. The gear set 14 is driven by the reel body 22. The motor 12 is connected to the control terminal of the touch screen 8 via a wire. The reel body 22 is wound with a measuring wire 15 with depth scale.

[0022] This utility model uses a protective housing 4 as a carrier to integrate a voltage acquisition device, a UPS 10, a printer 6, a touch screen 8, a reel, and a protective structure for the reference electrode 19. The UPS 10 provides stable power to all components. The voltage acquisition device connects the steel structure test point and the reference electrode 19 (the reference electrode 19 is connected to the negative interface via a measuring wire) through positive and negative interfaces 2, respectively. After acquiring the potential signal, it transmits it to the touch screen 8 via the first communication interface. The printer 6 receives instructions from the touch screen 8 through the second communication interface and prints the test data. The reel controls the raising and lowering of the measuring wire 15 via a hand crank 1 or an electric drive assembly (motor 12 drives gear set 14 to drive wheel 22), and the reference electrode 19 is accurately lowered by combining the depth scale on the measuring wire 15. This achieves integrated operation of offshore wind power sacrificial anode potential detection, avoiding maintenance personnel from carrying scattered tools and improving the convenience of on-site operation.

[0023] Furthermore, in battery mode, the UPS10 relies on its internal battery to store power, providing continuous power to the equipment for at least 4 hours, meeting the power supply requirements of a single offshore wind power test (which typically requires testing multiple units and multiple measurement points), and avoiding test interruptions due to mains power shortages. The elastic shock-absorbing rubber pad is fixed between the UPS10 housing 4 and the inner wall of the protective housing 4 with adhesive, using the elastic deformation of the rubber to absorb the impact force of the equipment in the vibration environment during transportation or at sea, reducing vibration damage to the internal components of the UPS10, reducing the maintenance cost of the equipment due to vibration failure, and ensuring the stable operation of the power supply system in the turbulent environment at sea.

[0024] Furthermore, the transmitter module has an internal mounting slot. The positive interface 9 of the voltage acquisition device is connected to the alligator clip via a wire. The temperature sensor 25 is installed in the mounting slot, and its output is connected to the transmitter module via a wire. The temperature sensor 25 collects the ambient temperature around the voltage acquisition device in real time and transmits the temperature signal to the transmitter module 20. The transmitter module 20 combines the temperature data to correct the collected potential signal, eliminating the influence of temperature changes on the voltage measurement accuracy, solving the problem of potential measurement error caused by temperature fluctuations in the marine environment, improving the accuracy and reliability of detection data under different temperature conditions, and meeting the requirements of high-precision detection. The alligator clip 13 at the end of the positive interface 9 can quickly clamp the steel structure test point and the wire, simplifying the wiring connection operation.

[0025] Furthermore, the paper tray of printer 6 is installed on the side of the printing module by a snap-fit, and the paper outlet of printer 6 is equipped with a dust cover 7 to prevent sea salt spray and dust from entering the inside of printer 6 and contaminating the printing components, thereby reducing the risk of corrosion and blockage of the internal components of printer 6, extending the service life of printer 6, and reducing the frequency and cost of equipment maintenance.

[0026] Furthermore, the touch screen 8 is an industrial-grade touch screen. The back mounting bracket 17 is connected to the protective housing 4 panel by screws. The touch screen 8 has a built-in storage chip 24, which is connected to the main board of the touch screen 8 by wires. It stores detection data (unit number, depth, potential value, etc.) in real time and supports local data caching and subsequent query and export.

[0027] Furthermore, the depth scale unit on the surface of the measuring wire 15 is meters, with a minimum scale value of 1 cm. Maintenance personnel can directly read the lowering depth of the reference electrode 19 by observing the scale, without the need for additional measuring tools. This reduces the operational difficulty for maintenance personnel, reduces the depth recording time, and improves the efficiency of multi-point cyclic detection.

[0028] Furthermore, the reference electrode 19 is housed within a protective structure, which includes a top cover. The top cover is connected to a conduit 23. The portion of the reference electrode 19 that connects to the measuring lead is located within the conduit 23. Sealant is injected into the conduit 23. A cover 16 is threaded onto the top cover. The cover 16 has multiple water-permeable holes. A water-permeable mesh 18 is installed inside the cover 16. The water-permeable mesh 18 is removable for cleaning or replacement, continuously filtering small particulate impurities and plankton from the seawater. In addition, the sealant injection into the conduit 23 effectively prevents seawater from seeping in, avoiding short circuits or signal interference, which could affect the transmission and accuracy of the detection data and ensure stable signal transmission.

[0029] Furthermore, the IP67-rated engineering plastic protective shell 4 is waterproof, dustproof, and corrosion-resistant, and can isolate seawater, salt spray, and dust. The anti-slip texture on the surface increases grip friction, making it convenient for maintenance personnel to carry. The side wall heat dissipation holes 3 (with dustproof nets) ensure heat dissipation inside the equipment while preventing dust from entering. The waterproof adhesive strips 5 at the joints fill the gaps to prevent seawater from seeping into the shell 4 from the joints.

[0030] The working process of this utility model includes the following steps: S1. On-site power supply preparation: If mains power is available, power UPS10 through the charging interface on the panel of the protective housing 4. UPS10 will automatically switch to "mains power mode" to directly power the internal voltage acquisition device, printer 6 and external touch screen 8. If there is no mains power, UPS10 will switch to "battery power mode" to continuously power the internal battery. The battery life is at least 4 hours. At the same time, the elastic shock-absorbing rubber pad between the UPS10 housing 4 and the inner wall of the protective housing 4 can absorb vibration and shock to protect the UPS10 components.

[0031] S2. Equipment Start-up and Status Confirmation: After the equipment is powered on, the touch screen 8 will automatically start and enter the main homepage. The interface displays basic information such as the UPS10 power level and voltage acquisition device working status (e.g., whether it is powered on normally and whether communication is smooth) in real time. The maintenance personnel will check the information one by one to confirm that the initial status of the equipment is normal (e.g., no error message and sufficient power).

[0032] S3. Initialize test parameters: The maintenance personnel enter the measurement interface by clicking the "Measurement Settings" option on the touch screen 8, enter the number of the wind turbine to be tested (such as "#8 wind turbine"), select the preset 1m test interval (to meet the multi-depth test requirements of offshore wind power), and the test angle with the vicinity of the wind turbine pile foundation ladder as 0° and clockwise every 120° (a total of 3 test positions), complete the test parameter settings and save.

[0033] S4. Inspection of reference electrode 19 and protective structure: Remove reference electrode 19 and confirm that its appearance is undamaged and that there is no electrolyte leakage; inspect the protective structure of reference electrode 19—the top cover and the housing 16 are tightly connected by threads, the sealant inside the conduit 23 is not cracked, the water permeable holes on the housing 16 are not blocked, and the internal water permeable mesh 18 is not damaged or has accumulated impurities. If there are any problems, replace or clean it in time.

[0034] S5. Reference electrode 19 wiring connection: Connect the reference electrode 19 to one end of the measuring lead on the reel, ensuring the connection is secure; connect the other end of the measuring lead to the negative terminal of the voltage acquisition device extending to the protective housing 4 panel through the lead terminal, forming a potential signal transmission loop of "reference electrode 19-measuring lead-voltage acquisition device". After checking that the wiring connection is not loose, place the reference electrode 19 into the cover 16 of the protective structure and tighten the top cover to fix it.

[0035] S6. Steel structure test point line connection: Determine the exposed steel structure location of the offshore wind turbine pile foundation 21 (such as exposed bolts). If there is no exposed part, remove the surface coating with a file (the area should be large enough to stably clamp the alligator clips); fix one end of the copper wire to the steel structure test point through the alligator clips, and connect the other end to the positive interface 9 of the voltage acquisition device to form a complete circuit of "steel structure-copper wire-voltage acquisition device". Gently pull the wire to confirm that the connection is reliable.

[0036] S7. Reference Electrode 19 Lowering and Positioning: Maintenance personnel can choose to lower the reference electrode 19 manually or electrically. Manual operation: Turn the hand crank 1 on one side of the wire wheel to rotate the wheel body 22 and release the measuring wire. Control the lowering depth of the reference electrode 19 by observing the depth scale (unit: meter, minimum scale: 1cm) on the surface of the measuring wire. Electric operation: Click the "Release" button on the touch screen 8. The motor 12 drives the wheel 22 to rotate through the gear set 14 to release the measuring wire. When the depth scale displays the preset measurement point depth (such as 1m or 2m), click the "Stop" button to complete the positioning of the reference electrode 19 at that measurement point.

[0037] S8. Temperature sensor installation (optional): If the ambient temperature fluctuates greatly, embed the temperature sensor into the mounting slot of the voltage acquisition and transmission module 20, connect the sensor output to the signal interface of the transmission module, and the sensor will collect the ambient temperature in real time and transmit it to the transmission module to prepare for temperature compensation of the potential signal.

[0038] S9. Potential Signal Acquisition and Processing: After the reference electrode 19 is in place, the voltage acquisition device receives the potential signals from the steel structure test point and the reference electrode 19 through the positive and negative interfaces respectively; the internal six-and-a-half-bit voltage acquisition and transmission module 20 (such as model AD7799) amplifies and filters the signal. If a temperature sensor has been installed, the transmission module corrects the potential value by combining the temperature data to eliminate temperature interference; the processed potential data is transmitted to the touch screen 8 through the first communication interface (485 interface, Modbus RTU protocol).

[0039] S10. Data Stability Judgment and Recording: Maintenance personnel observe the potential data displayed on the touch screen 8 and confirm that the reading change range within 5 minutes is within ±20mV (considered as data stability). Click the "Trigger Data Recording" button to temporarily store the unit number, depth, angle, potential value, acquisition time, and other information of the current measurement point to the built-in storage chip of the touch screen 8. The storage chip automatically adds a check code to the data for easy traceability later.

[0040] S11. Multi-point cyclic acquisition: Repeat steps S7-S10, according to the preset requirements of 3 detection orientations and 6 measurement points in each orientation (from the water surface to a water depth of 5m, with an interval of 1m), complete the lowering of the reference electrode 19, potential acquisition and data recording of all measurement points in sequence, and observe the data on the touch screen 8 in real time to ensure that the acquisition of each measurement point is normal.

[0041] S12. Supplementary data collection for abnormal measurement points: During the data collection process, if the potential difference between two adjacent measurement points exceeds 150mV (indicating a possible area of ​​potential abnormality), the maintenance personnel can control the electric drive component through the touch screen 8 to reduce the distance between measurement points (e.g., adjust it to 0.5m) and supplement the data collection for that area to ensure accurate capture of potential change details.

[0042] S13. Data anomaly handling: If the potential data displayed on the touch screen 8 fluctuates frequently or exceeds the normal range (such as the potential value deviating from the standard protection potential range), first check whether the protection structure of the reference electrode 19 is damaged (such as the water permeable hole being blocked, resulting in poor seawater contact) and whether the measurement wire connection is loose. If there is a problem, replace the protection structure or tighten the wire again and re-acquire the data. After ruling out hardware problems, check whether there is stray current interference (such as leakage from nearby ships or equipment). Continue data acquisition after the interference is eliminated.

[0043] S14. Printing of test data: After all measurement points are collected, the maintenance personnel click "Historical Data" on the touch screen 8 to enter the data interface, select all measurement point data of the current testing unit, and click the "Print Current Data" button; the printer 6 receives the instruction from the touch screen 8 through the second communication interface (RS232 interface) and prints the test document from the paper output port of the protective housing 4 panel. The document contains information such as the testing unit number, depth / angle / potential value of each measurement point, collection time, and equipment number, which is convenient for on-site storage.

[0044] S15. Export test data (select as needed): If subsequent computer analysis is required, insert the USB flash drive into the USB port 11 on the back of the touch screen 8 that extends to the panel. Click the "Export USB flash drive" button on the touch screen 8, select the data range to be exported, and export the historical data to the USB flash drive in a compatible format (such as Excel). After the export is complete, safely remove the USB flash drive.

[0045] S16. Reference Electrode 19 and Equipment Recovery: After data output is completed, the measuring wire is recovered by hand crank 1 of the reel or electric drive assembly. The protective structure of the reference electrode 19 is slowly raised above the sea surface. The reference electrode 19 is removed, and the sea mud and impurities on the surface of the protective structure shell are cleaned. The cover 16 is disassembled, and the permeable mesh 18 is taken out for cleaning or replacement. After drying, it is stored. The copper wire and alligator clips are recovered, and the circuit is tidied up to avoid tangling.

[0046] S17. Equipment shutdown and status check: Turn off the main power supply of the equipment, check that the waterproof sealing rings of each interface (network port, USB port, charging port) on the protective housing 4 panel are undamaged, the dustproof mesh of the heat dissipation holes 3 on the side wall is not blocked by debris, and the waterproof adhesive strips 5 at the splicing points are not detached; after confirming that no seawater has seeped into the interior of the housing 4, organize the tools and equipment to complete this inspection.

[0047] The embodiments described in this specification are merely examples of implementations of the inventive concept. The scope of protection of this utility model should not be considered as limited to the specific forms described in the embodiments. The scope of protection of this utility model also extends to equivalent technical means that can be conceived by those skilled in the art based on the inventive concept.

Claims

1. A sacrificial anode detection device, characterized in that, It includes a protective housing, a voltage acquisition device, a UPS, a printer, a touch screen, a reel, and a reference electrode. The voltage acquisition device, UPS, and printer are fixedly installed inside the protective housing. The touch screen is set on the panel of the protective housing. The reel is connected to the protective housing through a bracket. The UPS output is electrically connected to the voltage acquisition device, printer, and touch screen via wires. The voltage acquisition device includes a voltage acquisition and transmission module, positive and negative interfaces and a first communication interface. The positive and negative interfaces extend to the protective housing panel, and the first communication interface is connected to the touch screen signal. The printer includes a printing module, a removable paper tray, and a second communication interface. The paper output port of the printing module corresponds to the paper output port of the protective housing panel, and the second communication interface is connected to the touch screen signal. The reel includes a reel body, a hand crank, and an electric drive assembly. The reel body is connected to a bracket via bearings. The hand crank is fixedly connected to one side of the reel body. The electric drive assembly includes a motor and a gear set that is driven by the motor. The gear set is driven by the reel body. The motor is connected to the touch screen control terminal via wires. The reel body is wound with a measuring wire with depth markings. One end of the measuring wire is connected to a reference electrode, and the other end is connected to the negative terminal interface in the voltage acquisition device.

2. The sacrificial anode detection device according to claim 1, characterized in that, The UPS battery mode has a runtime of at least 4 hours, and elastic shock-absorbing rubber pads are fixed between the UPS housing and the inner wall of the protective housing by adhesive.

3. The sacrificial anode detection device according to claim 1, characterized in that, The transmitter module has an internal mounting slot. The positive interface of the voltage acquisition device is connected to the alligator clip via a wire. The temperature sensor is installed in the mounting slot, and the output of the temperature sensor is connected to the transmitter module via a wire.

4. The sacrificial anode detection device according to claim 1, characterized in that, The printer's paper tray is mounted on the side of the printing module via a snap-fit ​​mechanism, and the printer's paper output port is equipped with a dust cover.

5. The sacrificial anode detection device according to claim 1, characterized in that, The touchscreen is an industrial-grade touchscreen with a built-in memory chip, which is connected to the touchscreen motherboard via wires.

6. The sacrificial anode detection device according to claim 1, characterized in that, The depth scale for measuring the surface of a wire reel is in meters, with the smallest scale value being 1 cm.

7. The sacrificial anode detection device according to claim 1, characterized in that, The reference electrode is housed within a protective structure, which includes a top cover and a conduit connected to the top cover. The portion of the reference electrode connected to the measuring lead is housed within the conduit, and sealant is injected into the conduit. A cover is threaded onto the top cover, and the cover has multiple water-permeable holes. A water-permeable mesh is installed inside the cover.

8. The sacrificial anode detection device according to claim 1, characterized in that, The protective shell is made of IP67 grade engineering plastic with anti-slip texture on the surface, ventilation holes with dustproof mesh on the side wall, and waterproof strips at the joints.

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