A buried pipeline corrosion simulation monitoring device

Abstract

The present invention discloses a buried pipeline corrosion simulation monitoring device, specifically relating to the technical field of pipeline corrosion monitoring, comprising an electrolytic cell disposed on top of a workbench, wherein the top of the electrolytic cell is provided with an electrode component for simulating a corrosive environment, and the electrolytic cell promotes sufficient mixing of the solution through an auxiliary component; the auxiliary component comprises a hollow column disposed on the top of the workbench. The present invention drives the main gear and the first telescopic rod to rotate by a servo motor, and the first telescopic rod synchronously drives the electrolytic cell on the support plate to rotate. Since the support plate is movably connected to the movable ring, the main gear can drive the rotating shaft to rotate through the meshing slave gear, and rotate the linkage plate adjustment rod on the rotating shaft, thereby causing the top and bottom ends of the adjustment rod to be reciprocally dislocated, and such reciprocating movement can adjust the height of the electrolytic cell, thereby achieving the effect of synchronously rotating and shaking the electrolytic cell, and improving the mixing effect of the soil solution and bacterial strain in the electrolytic cell.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline corrosion monitoring, and more particularly to a buried pipeline corrosion simulation monitoring device. Background Art

[0002] Buried pipelines are exposed to complex soil environments for extended periods, susceptible to microbial influences and other factors. These factors can make them susceptible to corrosion accidents, posing a serious threat to energy transmission safety. To study pipeline corrosion mechanisms and preventative measures, laboratories often conduct simulated soil corrosion experiments to replicate real-world conditions.

[0003] However, existing experimental methods have problems such as cumbersome operation and poor data stability, which restrict the research and development efficiency of corrosion monitoring technology. In simulated corrosion experiments, the electrolyte needs to be manually shaken to ensure the uniformity of solution concentration. However, the shaking intensity, frequency and duration vary from person to person, making it difficult to standardize experimental conditions and reducing data comparability. In addition, when the electrode is removed during the experiment, the solution tends to adhere to the electrode surface and drip, and the dripping solution will contaminate the laboratory bench. This will affect the convenience of operation and the accuracy of the data. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a buried pipeline corrosion simulation monitoring device, which can achieve the effect of synchronous rotation and shaking of the electrolytic cell and improve the mixing effect of the soil solution and the bacterial strain.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A buried pipeline corrosion simulation monitoring device includes an electrolytic cell arranged on top of a workbench, an electrode component for simulating a corrosive environment is provided on the top of the electrolytic cell, and the electrolytic cell promotes sufficient mixing of solutions through auxiliary components;

[0007] The auxiliary part includes a hollow column arranged on the top of the workbench, the top of the hollow column is provided with a support plate and a movable ring movably connected to the bottom of the support plate through a bearing, the top of the support plate is installed with a clamping part for fixing the electrolytic cell, and the bottom of the support plate drives the electrolytic cell to rotate and shake up and down through an adjusting part.

[0008] In a preferred embodiment, the adjusting member includes a servo motor installed in a hollow column, the output shaft of the servo motor passes through the hollow column and extends to the outside of the top of the hollow column, and a main gear is sleeved on the outside of the output shaft of the servo motor, a first telescopic rod is provided on the top of the main gear, and the top and bottom ends of the first telescopic rod are respectively fixed to the bottom of the support plate and the top of the output shaft of the servo motor;

[0009] Both ends of the main gear are engaged with slave gears, and the slave gear is movably connected to the top of the hollow column through a rotating shaft, and a linkage plate is sleeved on the outside of the top of the rotating shaft, and a movably connected linkage seat is installed on the top of the linkage plate away from the rotating shaft, and a movable seat movably connected to the bottom of the movable ring is provided on the top of the linkage seat, and an adjusting rod is rotatably connected between the movable seat and the linkage seat.

[0010] In a preferred embodiment, the clamping member includes a plurality of elastic clips distributed in a circular array on the top of the support plate, the electrolytic cell is arranged on the top of the elastic clips, and the electrolytic cell is arranged inside the space formed by the plurality of elastic clips.

[0011] In a preferred embodiment, a plurality of second telescopic rods distributed in a circular array are provided outside the servo motor, and the bottom ends of the second telescopic rods are fixed to the bottom of the hollow column inner cavity, and the top ends of the second telescopic rods pass through the hollow column and are fixed to the bottom of the movable ring.

[0012] In a preferred embodiment, the electrode assembly includes a mounting plate arranged on the top of the electrolytic cell, and an electric push rod for connecting the mounting plate is installed on the top of the workbench inner cavity, three electrodes distributed in a circular array are installed on the bottom of the mounting plate, and a fixing member for placing the sample is provided between the three electrodes.

[0013] In a preferred embodiment, the fixing member includes a fixing column installed at the bottom of the mounting plate, a fixing ring is installed at the bottom end of the fixing column, a retaining ring is installed inside the rear end of the fixing ring, and a sealing column is provided on the front side of the retaining ring and is threadedly connected to the fixing ring.

[0014] In a preferred embodiment, the three electrodes are covered with a same positioning ring, and the tops of both ends of the positioning ring are equipped with positioning columns for connecting to the workbench, and the side of the positioning ring corresponding to the electrode is provided with a cleaning piece for cleaning the attached solution;

[0015] The three sets of cleaning parts all include a positioning cylinder movably connected to the inside of the positioning ring, and the positioning cylinder is sleeved on the outside of the electrode. A cleaning ring for cleaning the surface of the electrode is installed at the bottom end of the positioning cylinder, and a fan blade sleeved on the outside of the positioning cylinder is provided on the top of the cleaning ring. The outside of the three positioning cylinders are all sleeved with pulleys, and the three pulleys are driven by belts.

[0016] In a preferred embodiment, a first gear is sleeved on the outside of the top end of one of the positioning cylinders, and a second gear is meshed with one end of the first gear. A micro motor is installed on the side of the bottom of the positioning ring corresponding to the second gear, and the output shaft of the micro motor passes through the positioning ring and is fixed to the second gear.

[0017] In a preferred embodiment, a plurality of heat dissipation holes are formed on the outside of the hollow column, and the plurality of heat dissipation holes are distributed in a ring array.

[0018] The technical effects and advantages of the present invention are as follows:

[0019] 1. The servo motor drives the main gear and the first telescopic rod to rotate, and the first telescopic rod synchronously drives the electrolytic cell on the support plate to rotate. Because the support plate is movably connected to the movable ring, the main gear can drive the rotating shaft to rotate through the meshing slave gear, and rotate the linkage plate adjustment rod on the rotating shaft, so that the top and bottom ends of the adjustment rod are reciprocally dislocated. This reciprocating movement can adjust the height of the electrolytic cell, thereby achieving the effect of synchronous rotation and shaking of the electrolytic cell, improving the mixing effect of the soil solution and bacterial strain in the electrolytic cell, and ensuring the accuracy of subsequent simulation experiments;

[0020] 2. The second gear is driven to rotate by a micro motor, and the second gear drives one of the positioning cylinders to rotate through the meshing first gear. Since pulleys are installed on the outside of the three positioning cylinders, and the three pulleys are driven by belts, the three positioning cylinders can be synchronously operated by the belts, thereby achieving the effect of synchronous cleaning of the three electrodes, improving the cleaning efficiency of the electrodes, avoiding the solution adhering to the outside of the electrodes and causing pollution, and avoiding the solution dripping onto the workbench and causing pollution. At the same time, the fan blades on the positioning cylinders can also drive air circulation, and the electrodes can be blown dry by air flow, thereby improving the cleaning effect of the electrodes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 For the present invention Figure 1 Enlarged view of part A.

[0023] Figure 3 It is a cross-sectional view of the hollow column of the present invention.

[0024] Figure 4 This is a bottom view of the support plate of the present invention.

[0025] Figure 5 It is the front view of the mounting plate of the present invention.

[0026] Figure 6 It is a side sectional view of the fixing ring of the present invention.

[0027] Figure 7 It is a side sectional view of the positioning ring of the present invention.

[0028] The accompanying drawings are:

[0029] 1. Workbench; 2. Electrolytic cell;

[0030] 3. Electrode parts; 301. Mounting plate; 302. Electric push rod; 303. Electrode;

[0031] 4. Auxiliary parts; 401. Hollow column; 402. Support plate; 403. Movable ring;

[0032] 5. Clamping piece; 501. Elastic card;

[0033] 6. Adjustment member; 601. Servo motor; 602. Main gear; 603. First telescopic rod; 604. Slave gear; 605. Rotating shaft; 606. Linkage plate; 607. Linkage seat; 608. Movable seat; 609. Adjustment rod;

[0034] 7. Second telescopic rod;

[0035] 8. Fixing parts; 801. Fixing column; 802. Fixing ring; 803. Retaining ring; 804. Sealing column;

[0036] 9. Positioning ring; 10. Positioning column;

[0037] 11. Cleaning piece; 111. Positioning cylinder; 112. Cleaning ring; 113. Pulley; 114. Belt; 115. Fan blade;

[0038] 12. First gear; 13. Second gear; 14. Micro motor; 15. Heat dissipation hole. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] Refer to the instruction manual Figure 1-Figure 7 The present invention provides a buried pipeline corrosion simulation monitoring device, including an electrolytic cell 2 arranged on the top of a workbench 1, an electrode component 3 for simulating a corrosion environment is provided on the top of the electrolytic cell 2, and the electrolytic cell 2 promotes sufficient mixing of the solution through an auxiliary component 4.

[0041] The auxiliary component 4 includes a hollow column 401 arranged on the top of the workbench 1, and a support plate 402 is provided on the top of the hollow column 401, and a movable ring 403 movably connected to the bottom of the support plate 402 through a bearing (not shown in the figure, but those skilled in the art should understand the arrangement of the bearing here).

[0042] Before using the above-mentioned electrolytic cell 2 to monitor the corrosion of buried pipelines, the staff used high-temperature equipment to sterilize the electrolytic cell 2 at high temperature and high pressure (high-temperature and high-pressure sterilization is generally set at 121°C-126°C, and the pressure is 103.4kPa to 139kPa), and then placed the electrolytic cell 2 on the top of the workbench 1 for experiments. Because a clamping member 5 for fixing the electrolytic cell 2 is installed on the top of the support plate 402, and the clamping member 5 includes a plurality of elastic clips 501 distributed in a circular array on the top of the support plate 402, the electrolytic cell 2 is arranged on the top of the elastic clip 501, and the electrolytic cell 2 is arranged inside the space formed by the plurality of elastic clips 501, and is fixed by the plurality of elastic clips 501 to ensure the stability of the electrolytic cell 2.

[0043] Subsequently, the staff needs to simulate the soil environment around the buried pipeline, prepare appropriate bacterial strains and simulated soil solutions, and perform deoxygenation treatment. The deoxygenated soil solution and bacterial strains are then injected into the electrolytic cell 2 after high temperature and high pressure sterilization.

[0044] Among them, the bottom of the support plate 402 drives the electrolytic cell 2 to rotate and shake up and down through the adjusting member 6, so as to improve the mixing effect of the bacteria and the simulated soil solution, and the adjusting member 6 includes a servo motor 601 installed in the hollow column 401, the output shaft of the servo motor 601 passes through the hollow column 401 and extends to the outside of the top of the hollow column 401, and the output shaft of the servo motor 601 is sleeved with a main gear 602 on the outside, and the top of the main gear 602 is provided with a first telescopic rod 603, and the top and bottom ends of the first telescopic rod 603 are respectively fixed to the bottom of the support plate 402 and the top of the output shaft of the servo motor 601; both ends of the main gear 602 are meshed There is a slave gear 604, and the slave gear 604 is movably connected to the top of the hollow column 401 through a rotating shaft 605, and a linkage plate 606 is provided on the outside of the top of the rotating shaft 605. A linkage seat 607 movably connected through a bearing (not shown in the figure, but those skilled in the art should understand how the bearing is set here) is installed on the top of the linkage plate 606 at one end away from the rotating shaft 605. A movable seat 608 movably connected to the bottom of the movable ring 403 through a bearing (not shown in the figure, but those skilled in the art should understand how the bearing is set here) is provided on the top of the linkage seat 607, and an adjusting rod 609 is rotatably connected between the movable seat 608 and the linkage seat 607.

[0045] Therefore, the staff starts the servo motor 601 to drive the main gear 602 and the first telescopic rod 603 to rotate, and the first telescopic rod 603 synchronously drives the electrolytic cell 2 on the support plate 402 to rotate, so as to promote the soil solution in the electrolytic cell 2 and the bacterial strain to be fully mixed. Because the support plate 402 and the movable ring 403 are movably connected by a bearing (not shown in the figure, but those skilled in the art should understand the arrangement of the bearing here), the movable ring 403 will not rotate with the support plate 402, and then when the main gear 602 engages the transmission slave gear 604, the slave gear 604 can drive the linkage plate 606 on the rotating shaft 605 to rotate. The movable ring 403 is moved downwardly by the movable rod 609, thereby driving the linkage seat 607 and the adjustment rod 609 to rotate through the movable connection, so that the top and bottom ends of the adjustment rod 609 are reciprocally misaligned. When the top and bottom ends of the adjustment rod 609 are misaligned, the adjustment rod 609 can move the support plate 402 on the movable ring 403 downwardly. When the top and bottom ends of the adjustment rod 609 are aligned, the adjustment rod 609 lifts the support plate 402 on the movable ring 403 upwardly. This reciprocating movement can adjust the height of the electrolytic cell 2, thereby achieving the effect of synchronously rotating and shaking the electrolytic cell 2, improving the mixing effect of the simulated soil solution and the bacterial strain in the electrolytic cell 2, and ensuring the accuracy of subsequent monitoring. Finally, the electrolytic cell 2 is sealed and placed in a constant temperature box for cultivation.

[0046] At the same time, if Figure 2-Figure 4 As shown, in order to ensure the stability of the movable ring 403 and prevent the movable ring 403 from rotating, it is necessary to limit the movable ring 403. Therefore, a plurality of second telescopic rods 7 distributed in a circular array are provided on the outside of the servo motor 601, and the bottom ends of the second telescopic rods 7 are fixed to the bottom of the inner cavity of the hollow column 401. The top ends of the second telescopic rods 7 pass through the hollow column 401 and are fixed to the bottom of the movable ring 403. This allows the top ends of the second telescopic rods 7 to limit the movable ring 403 and to adjust the length of the movable ring 403 as the height of the movable ring 403 changes, thereby ensuring the stability of the movable ring 403. In addition, a plurality of heat dissipation holes 15 are provided on the outside of the hollow column 401. The plurality of heat dissipation holes 15 are distributed in a circular array. This ensures the heat dissipation performance of the servo motor 601 and prevents heat accumulation from causing overheating of the servo motor 601.

[0047] like Figure 2 、 Figure 5 and Figure 6 As shown, after the simulated soil solution is prepared, the staff moves the hollow column 401 to the bottom of the electrode member 3 and makes the electrolytic cell 2 correspond to the electrode member 3. The electrode member 3 includes a mounting plate 301 provided on the top of the electrolytic cell 2, and an electric push rod 302 for connecting the mounting plate 301 is installed on the top of the inner cavity of the workbench 1. Three electrodes 303 distributed in a circular array are installed at the bottom of the mounting plate 301, and a fixing member 8 for placing the sample is provided between the three electrodes 303.

[0048] When operating the electrode 303 to perform electrochemical measurements on the simulated soil solution, the staff needs to first place the sample inside the fixing part 8, and the fixing part 8 includes a fixing column 801 installed at the bottom of the mounting plate 301, and a fixing ring 802 is installed at the bottom end of the fixing column 801, and a retaining ring 803 is installed inside the rear end of the fixing ring 802, and a sealing column 804 is provided on the front side of the retaining ring 803 and is threadedly connected to the fixing ring 802. Therefore, the staff needs to first rotate the sealing column 804 to separate it from the fixing ring 802, and then place the sample on the retaining ring 803 inside the fixing ring 802, and then rotate the sealing column 804 to threadably connect it to the fixing ring 802, and fix the sample with the sealing column 804.

[0049] Afterwards, the staff activated the electric push rod 302 to move the mounting plate 301 downward. The mounting plate 301 then moved the three electrodes 303 and the fixing ring 802 on the fixing column 801 downward into the electrolytic cell 2, thereby bringing the sample and the electrodes 303 into contact with the soil solution. Subsequently, the three electrodes 303 were simultaneously connected to an electrochemical workstation via wires (not shown in the figure) for electrochemical measurements. Electrochemical parameters were obtained through open circuit potential, electrochemical impedance spectroscopy, and potentiodynamic polarization curve measurements to explore the corrosion behavior of microorganisms in the simulated soil environment. By weighing the samples before and after the immersion experiment, the corrosion rate of the samples under different conditions was calculated based on the weight loss, thereby achieving real-time monitoring of the microbial corrosion process in the pipeline.

[0050] Another example Figure 5 and Figure 7 As shown, the three electrodes 303 are externally sleeved with a same positioning ring 9, and positioning columns 10 for connecting to the workbench 1 are installed on the top of both ends of the positioning ring 9, and a cleaning piece 11 for cleaning the attached solution is provided on the side of the positioning ring 9 corresponding to the electrode 303; the three sets of cleaning pieces 11 all include a positioning cylinder 111 movably connected to the inside of the positioning ring 9 through a bearing (not shown in the figure, but those skilled in the art should understand the arrangement of the bearing here), and the positioning cylinder 111 is sleeved on the outside of the electrode 303, and a cleaning ring 112 for cleaning the surface of the electrode 303 is installed at the bottom end of the positioning cylinder 111, and a fan blade 115 is provided on the top of the cleaning ring 112 and sleeved on the outside of the positioning cylinder 111, and the three positioning cylinders 111 are externally sleeved with a pulley 113, and the three pulleys 113 are driven by a belt 114.

[0051] When the three electrodes 303 move downward together with the mounting plate 301, the three electrodes 303 will be inserted into the corresponding positioning cylinders 111. Therefore, after the use of the electrodes 303 is finished, and when the electric push rod 302 drives the mounting plate 301 to slowly move upward, the staff can start the cleaning ring 112 on the positioning cylinder 111 to clean the surface of the electrode 303 to prevent the solution from adhering to the outside of the electrode 303 and causing contamination, and also to prevent the solution from dripping onto the workbench 1 and causing contamination.

[0052] In order to improve the convenience of cleaning the three electrodes 303, a first gear 12 is sleeved on the top of one of the positioning cylinders 111, and a second gear 13 is meshed at one end of the first gear 12. A micro motor 14 is installed on the side of the second gear 13 corresponding to the bottom of the positioning ring 9. The output shaft of the micro motor 14 passes through the positioning ring 9 and is fixed to the second gear 13. The second gear 13 is driven to rotate by the micro motor 14, and the second gear 13 drives the positioning cylinder 111 to rotate through the meshed first gear 12. Because pulleys 113 are installed on the outside of the three positioning cylinders 111, and the three pulleys 113 are driven by belts 114, the three positioning cylinders 111 can operate synchronously, thereby achieving the effect of synchronously cleaning the three electrodes 303, improving the cleaning efficiency of the electrodes 303, and when the positioning cylinder 111 rotates, it can drive the fan blades 115 to operate, thereby driving air circulation, and the electrodes 303 are blown dry by the air flow, thereby improving the cleaning effect of the electrodes 303.

[0053] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A buried pipeline corrosion simulation monitoring device, comprising an electrolytic cell (2) disposed on top of a workbench (1), characterized in that: The top of the electrolytic cell (2) is provided with an electrode component (3) for simulating a corrosive environment, and the electrolytic cell (2) promotes full mixing of the solution through an auxiliary component (4); The auxiliary component (4) includes a hollow column (401) provided on the top of the workbench (1), a support plate (402) and a movable ring (403) movably connected to the bottom of the support plate (402) via a bearing, a clamping member (5) for fixing the electrolytic cell (2) is installed on the top of the support plate (402), and the bottom of the support plate (402) drives the electrolytic cell (2) to rotate and shake up and down through an adjusting member (6); The electrode member (3) includes a mounting plate (301) disposed on the top of the electrolytic cell (2), and an electric push rod (302) for connecting to the mounting plate (301) is installed on the top of the inner cavity of the workbench (1), and three electrodes (303) distributed in a ring array are installed on the bottom of the mounting plate (301), and a fixing member (8) for placing a sample is provided between the three electrodes (303); The three electrodes (303) are externally sleeved with a common positioning ring (9), and positioning posts (10) for connecting to the workbench (1) are installed on the tops of both ends of the positioning ring (9), and a cleaning piece (11) for cleaning attached solution is provided on one side of the positioning ring (9) corresponding to the electrode (303); The adjusting member (6) includes a servo motor (601) installed in the hollow column (401), an output shaft of the servo motor (601) passes through the hollow column (401) and extends to the outside of the top of the hollow column (401), and a main gear (602) is sleeved on the outside of the output shaft of the servo motor (601), a first telescopic rod (603) is provided on the top of the main gear (602), and the top and bottom ends of the first telescopic rod (603) are respectively fixed to the bottom of the support plate (402) and the top of the output shaft of the servo motor (601); Both ends of the main gear (602) are meshed with slave gears (604), and the slave gear (604) is movably connected to the top of the hollow column (401) through a rotating shaft (605), and a linkage plate (606) is sleeved on the top of the rotating shaft (605). The top of the linkage plate (606) away from the rotating shaft (605) is movably connected to a linkage seat (607), and a movable seat (608) movably connected to the bottom of the movable ring (403) is installed on the top of the linkage seat (607), and an adjusting rod (609) is rotatably connected between the movable seat (608) and the linkage seat (607).

2. The buried pipeline corrosion simulation monitoring device according to claim 1, characterized in that: The clamping member (5) comprises a plurality of elastic clamping plates (501) distributed in a ring array on the top of the support plate (402), the electrolytic cell (2) is arranged on the top of the elastic clamping plates (501), and the electrolytic cell (2) is arranged inside the space formed by the plurality of elastic clamping plates (501).

3. The buried pipeline corrosion simulation monitoring device according to claim 1, characterized in that: The servo motor (601) is provided with a plurality of second telescopic rods (7) distributed in a ring array outside, and the bottom ends of the second telescopic rods (7) are fixed to the bottom of the inner cavity of the hollow column (401), and the top ends of the second telescopic rods (7) pass through the hollow column (401) and are fixed to the bottom of the movable ring (403).

4. The buried pipeline corrosion simulation monitoring device according to claim 1, characterized in that: The fixing member (8) comprises a fixing column (801) mounted on the bottom of the mounting plate (301), a fixing ring (802) being mounted on the bottom end of the fixing column (801), a retaining ring (803) being mounted inside the rear end of the fixing ring (802), and a sealing column (804) being threadedly connected to the fixing ring (802) being provided on the front side of the retaining ring (803).

5. The buried pipeline corrosion simulation monitoring device according to claim 1, characterized in that: The three groups of cleaning parts (11) all include a positioning cylinder (111) movably connected to the inside of the positioning ring (9), and the positioning cylinder (111) is sleeved on the outside of the electrode (303). The bottom end of the positioning cylinder (111) is equipped with a cleaning ring (112) for cleaning the surface of the electrode (303). The top of the cleaning ring (112) is provided with a fan blade (115) sleeved on the outside of the positioning cylinder (111). The outside of the three positioning cylinders (111) is all sleeved with a pulley (113), and the three pulleys (113) are driven by a belt (114).

6. The buried pipeline corrosion simulation monitoring device according to claim 5, characterized in that: A first gear (12) is sleeved on the outer top of one of the positioning cylinders (111), and a second gear (13) is meshed with one end of the first gear (12). A micro motor (14) is installed on the side of the bottom of the positioning ring (9) corresponding to the second gear (13). The output shaft of the micro motor (14) passes through the positioning ring (9) and is fixed to the second gear (13).

7. The buried pipeline corrosion simulation monitoring device according to claim 1, characterized in that: The hollow column (401) is provided with a plurality of heat dissipation holes (15) on the outside, and the plurality of heat dissipation holes (15) are distributed in a ring array.

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