High-voltage cable sheath ring current on-line monitoring device

Abstract

The utility model discloses a high-voltage cable sheath ring current on-line monitoring device, which is applied to the technical field of cable ring current monitoring, and comprises a box body, a box cover, a main sealing ring, a mounting plate, a ring current monitoring assembly and a connecting piece, the box body is provided with a mounting cavity and an opening communicated with the mounting cavity; the box body further comprises a bottom plate, a mounting side plate connected to the bottom plate and a mounting part arranged on the inner surface of the mounting side plate, and the mounting side plate is provided with a mounting hole; the box cover covers the opening; the main sealing ring is arranged between the box body and the box cover, and the main sealing ring is clamped by the box body and the box cover together and surrounds the opening; the mounting plate is arranged in the mounting cavity and connected to the mounting part, and the mounting plate, the bottom plate and the mounting side plates are arranged at intervals; the ring current monitoring assembly is arranged on the mounting plate and is used for monitoring ring current in the cable; and the connecting piece penetrates through the mounting hole and is used for connecting a cable. The high-voltage cable sheath ring current on-line monitoring device can improve the waterproof capability and prevention capability of itself.

Description

Technical Field

[0001] This utility model relates to the field of cable circulating current monitoring technology, and in particular to an online monitoring device for circulating current in the sheath of high-voltage cables. Background Technology

[0002] The power system provides the essential energy for the operation of a city, and the impact of cable failures on urban operations is immeasurable. Before a cable failure, there is usually an increase in the circulating current to the cable ground, making the detection of circulating current in high-voltage power cables particularly important. Among related technologies, intelligent grounding boxes can automatically detect the circulating current in high-voltage power cables and report the data. This system replaces traditional manual inspections, improving the efficiency of cable condition monitoring and operation maintenance. However, these intelligent grounding boxes are used in outdoor environments with harsh daily operating conditions, such as rain, snow, and even hail. Furthermore, the intelligent grounding box contains various electrical components, and if rainwater enters, it can easily lead to short circuits or even fires. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an online monitoring device for circulating current in high-voltage cable sheaths, which can improve waterproofing and preventative capabilities.

[0004] According to an embodiment of the present invention, a high-voltage cable sheath circulating current online monitoring device includes: a housing having a mounting cavity and an opening communicating with the mounting cavity; the housing further includes a bottom plate, a mounting side plate connected to the bottom plate, and a mounting portion disposed on the inner surface of the mounting side plate, the mounting side plate having mounting holes; a housing cover connected to the housing and covering the opening; a main sealing ring disposed between the housing and the housing cover, the main sealing ring being held together by the housing and the housing cover and surrounding the opening; and a mounting plate disposed in the mounting cavity and connected to the mounting portion, the mounting plate being spaced apart from the bottom plate and the mounting side plate. A circulating current monitoring component is disposed on the mounting plate and used to monitor the circulating current in the cable; a connector is inserted through the mounting hole, the connector including an inner body located in the mounting cavity, an outer body located outside the housing, a first sealing ring, a second sealing ring, and a cap, the inner body being electrically connected to the circulating current monitoring component and having a first abutting surface, the first abutting surface and the inner surface of the mounting side plate together clamping the first sealing ring, the outer body being used to connect the cable and having a second abutting surface, the second abutting surface and the outer peripheral surface of the mounting side plate together clamping the second sealing ring, and the cap sealingly covering the outer body.

[0005] The high-voltage cable sheath circulating current online monitoring device according to the present invention has at least the following beneficial effects: The main sealing ring seals the gap between the housing and the cover, achieving a first layer of sealing; the first and second sealing rings of the connector seal both ends of the mounting hole, achieving a second layer of sealing; and the outer body of the connector is covered by a cap, achieving a third layer of sealing. This ensures the mounting cavity is completely sealed, achieving IP68 waterproof rating and greatly improving waterproofing capabilities. Simultaneously, considering the initial failure caused by extreme weather or other accidents, external water will mainly seep into the housing along the mounting side plate. By installing a suspended mounting plate inside the mounting cavity, the circulating current monitoring component is suspended within the cavity. When water seeps in from the mounting side plate, it mainly seeps into the space between the bottom plate and the mounting plate without affecting the normal operation of the circulating current monitoring component. Furthermore, water is less likely to flow to the mounting plate, reducing the risk of water ingress into the circulating current monitoring component and enabling the high-voltage cable sheath circulating current online monitoring device to function normally even when water seeps in.

[0006] According to some embodiments of the present invention, the mounting plate is erected on the top surface of the mounting part.

[0007] According to some embodiments of the present invention, the circulation monitoring component includes a main body and a connecting part, wherein the main body is spaced apart from the mounting plate, and the connecting part is connected between the main body and the mounting plate.

[0008] According to some embodiments of the present invention, the connector further includes a mounting ring and a connecting strap. The mounting ring is sleeved on the outer body, and the connecting strap connects the mounting ring and the cap. The mounting ring and the second sealing ring are connected as an integral structure.

[0009] According to some embodiments of the present invention, it further includes: a power supply box, the power supply box being connected to the mounting plate and electrically connected to the circulating current monitoring component, the power supply box including a main body and a fixing strip, the middle part of the fixing strip abutting against the side of the main body away from the mounting plate, and both ends of the fixing strip being connected to the mounting plate to fix the main body to the mounting plate.

[0010] According to some embodiments of the present invention, it further includes: a mutual inductance power supply and a power adapter, wherein the power adapter is electrically connected to the mutual inductance power supply and the power adapter is connected to the mounting plate, and the mutual inductance power supply is used to mutually induct and draw power from the current in the cable.

[0011] According to some embodiments of the present invention, the mounting part includes a connecting plate part, a bent plate part, and a mounting plate part. The connecting plate part is attached to and connected to the mounting side plate. The mounting plate part extends toward the mounting cavity. The bent plate part connects the connecting plate part and the mounting plate part. The mounting plate part is connected to the mounting plate.

[0012] According to some embodiments of the present invention, it further includes a data processing component and a wireless communication component. The data processing component and the wireless communication component are both connected to the mounting plate. The data processing component is electrically connected to the circulating current monitoring component and is used to process data. The wireless communication component is electrically connected to the data processing component and is used for wireless communication.

[0013] According to some embodiments of the present invention, it further includes: a water level detector, the water level detector being disposed on the inner surface of the base plate, and the water level detector being electrically connected to the data processing component.

[0014] According to some embodiments of the present invention, the number of water level detectors is four, and the four water level detectors are respectively disposed at the four corners of the base plate.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0017] Figure 1 This is an exploded view of an online monitoring device for circulating current in high-voltage cable sheaths according to an embodiment of the present invention;

[0018] Figure 2 This is a cross-sectional schematic diagram from a first perspective of an embodiment of the online monitoring device for circulating current in high-voltage cable sheaths according to this utility model;

[0019] Figure 3 This is a cross-sectional schematic diagram from a second perspective of an embodiment of the online monitoring device for circulating current in high-voltage cable sheaths according to this utility model;

[0020] Figure 4 for Figure 3 A magnified view of part A in the middle;

[0021] Figure 5 This is a cross-sectional schematic diagram from a third perspective of an embodiment of the high-voltage cable sheath circulating current online monitoring device of this utility model.

[0022] Icon labels:

[0023] 100 housing; 101 mounting cavity; 110 bottom plate; 120 mounting side plate; 130 mounting part; 131 connecting plate part; 132 bending plate part; 133 mounting flat plate part; 140 fixing part;

[0024] Box lid 200;

[0025] Main sealing ring 300;

[0026] Mounting plate 400;

[0027] Circulation monitoring component 500; main body 510; connecting part 520;

[0028] Connector 600; Inner body 610; Outer body 620; First sealing ring 630; Second sealing ring 640; Cap 650; Mounting ring 660; Connecting strip 670;

[0029] Power supply box 700; main body 710; fixing strip 720;

[0030] Power adapter 800;

[0031] Water level detector 900. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0033] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, 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 this utility model.

[0034] In the description of this utility model, "several" refers to one or more, and "multiple" refers to two or more. The use of "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, the number of indicated technical features, or the sequential relationship between indicated technical features.

[0035] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0036] Reference Figures 1 to 5 As shown in the figure, this utility model embodiment proposes an online monitoring device for circulating current in high-voltage cable sheaths, including: a housing 100, a housing cover 200, a main sealing ring 300, a mounting plate 400, a circulating current monitoring component 500, and a connector 600.

[0037] The enclosure 100 has a mounting cavity 101 and an opening communicating with the mounting cavity 101. The enclosure 100 also includes a bottom plate 110, a mounting side plate 120 connected to the bottom plate 110, and a mounting portion 130 provided on the inner surface of the mounting side plate 120. The mounting side plate 120 has mounting holes. In this embodiment, the enclosure 100 is rectangular. An opening is provided on the top surface of the enclosure 100. The mounting side plate 120 and the bottom plate 110 of the enclosure 100 together form the mounting cavity 101. The opening facilitates the installation of the mounting plate 400, the circulating current monitoring component 500, and the connector 600 within the mounting cavity 101, making installation more convenient. The mounting holes formed by the mounting side plate 120 are through holes for the installation of the connector 600, realizing the electrical connection between the inside of the enclosure 100 and the external cable, thereby facilitating monitoring work. In addition, the outer periphery of the housing 100 also has a fixing part 140, which is used to fix it to other external structures or the ground, so that the high-voltage cable sheath circulation online monitoring device can be kept fixed.

[0038] The lid 200 is connected to the box body 100 and covers the opening of the box body 100. In this embodiment, the lid 200 is locked to the box body 100 by a flange and bolts. The lid 200 includes a cover body and a cover flange, and the box body 100 includes a box body and a box flange. The cover flange and the box flange are aligned and each has a plurality of bolt holes evenly distributed along the circumference of the lid 200 for bolt locking. Both the box body 100 and the lid 200 are made of stainless steel and have excellent structural strength.

[0039] The main sealing ring 300 is disposed between the housing 100 and the cover 200. The main sealing ring 300 is clamped by the housing 100 and the cover 200 together and surrounds the opening of the housing 100. In this embodiment, the main sealing ring 300 is clamped and fixed by the cover flange and the housing flange. The main sealing ring 300 also has multiple holes along its axial direction, each hole being aligned with bolt holes, so that the main sealing ring 300 is also fixed by bolts and is not easy to move, thereby improving the installation accuracy of the main sealing ring 300.

[0040] The mounting plate 400 is disposed in the mounting cavity 101 and connected to the mounting part 130. The mounting plate 400 is spaced apart from the bottom plate 110 and the mounting side plate 120. The mounting plate 400 is mainly connected to the mounting part 130. The bottom surface of the mounting plate 400 is spaced apart from the bottom plate 110, the periphery of the mounting plate 400 is spaced apart from the mounting side plate 120, and the top surface of the mounting plate 400 is also spaced apart from the tank cover 200. This makes the mounting plate 400 suspended relative to the tank body 100. Even if some water seeps into the tank body 100, it mainly flows into the bottom plate 110 along the mounting side plate 120 and is difficult to flow directly into the mounting plate 400.

[0041] The circulating current monitoring component 500 is mounted on the mounting plate 400 and is used to monitor the circulating current in the cable. The circulating current monitoring component 500 is mounted on the mounting plate 400. Based on the suspended design of the mounting plate 400, even if water seeps into the box 100, it is difficult to reach the mounting plate 400. The online monitoring device for circulating current in the high-voltage cable sheath can still work normally, reducing the risk of short circuit of the circulating current monitoring component 500 due to being wetted.

[0042] The connector 600 passes through the mounting hole and includes an inner body 610 located in the mounting cavity 101, an outer body 620 located outside the housing 100, a first sealing ring 630, a second sealing ring 640, and a cap 650. The inner body 610 is electrically connected to the circulating current monitoring assembly 500 and has a first abutting surface. The first abutting surface and the inner surface of the mounting side plate 120 together clamp the first sealing ring 630. The outer body 620 is used to connect the cable and has a second abutting surface. The second abutting surface and the outer peripheral surface of the mounting side plate 120 together clamp the second sealing ring 640. The cap 650 seals and covers the outer body 620. In this embodiment, the connector 600 clamps the first sealing ring 630 together with the inner surface of the mounting side plate 120 via the first abutment surface, resulting in uniform compressive force on the first sealing ring 630 and a better sealing effect. Similarly, the second sealing ring 640 also achieves a better sealing effect. Specifically, the inner body 610 and outer body 620 of the connector 600 are connected by threads. After the inner body 610 and outer body 620 rotate relative to each other and are connected as one unit via the threads, the distance between the first abutment surface and the second abutment surface is shortened. The first abutment surface abuts against the first sealing ring 630 and clamps it together with the inner surface of the mounting side plate 120. The second abutment surface abuts against the second sealing ring 640 and clamps it together with the outer surface of the mounting side plate 120, thereby improving the sealing effect. The connector 600 has an outer body 620 with a connection port for connecting cables. When the connection port is not in use, it needs to be protected to avoid the effects of rain and dust. Therefore, the cap 650 is sealed to the outer body 620, which seals and protects the connection port, thus improving safety during use.

[0043] It is understandable that the main sealing ring 300 seals the gap between the housing 100 and the cover 200, achieving the first layer of sealing. The first sealing ring 630 and the second sealing ring 640 of the connector 600 seal both ends of the mounting hole, achieving the second layer of sealing. The outer body 620 of the connector 600 is also covered by a cap 650, achieving the third layer of sealing. This ensures that the mounting cavity 101 is completely sealed, achieving IP68 waterproof rating and greatly improving waterproof capability. At the same time, considering the initial failure caused by extreme weather or other accidents, external water flow will mainly follow the mounting of the housing 100. If water leaks into the housing 100 from the side plate 120, a suspended mounting plate 400 is installed inside the mounting cavity 101, allowing the circulation monitoring component 500 to be suspended within the mounting cavity 101. When water seeps in from the side plate 120, the water will mainly seep along the side plate 120 into the space between the bottom plate 110 and the mounting plate 400, without affecting the normal operation of the circulation monitoring component 500. At the same time, the water is less likely to flow to the mounting plate 400, reducing the risk of water ingress and short circuit in the circulation monitoring component 500. This also ensures that the high-voltage cable sheath circulation online monitoring device can still function normally even when water seeps in.

[0044] Reference Figure 2 , Figure 3 and Figure 5 As shown, in some specific embodiments of this utility model, the mounting plate 400 is placed on the top surface of the mounting part 130, so that the mounting plate 400 is located on the mounting part 130. Even if some water flows to the top surface of the mounting part 130, it is difficult to cross the thickness of the mounting plate 400 and move from the bottom surface of the mounting plate 400 to the top surface of the mounting plate 400, thereby reducing the risk of water ingress and short circuit of the circulation monitoring component 500 and other components.

[0045] Reference Figure 5 As shown, in some specific embodiments of this utility model, the circulation monitoring component 500 includes a main body 510 and a connecting part 520. The main body 510 is spaced apart from the mounting plate 400, and the connecting part 520 is connected between the main body 510 and the mounting plate 400.

[0046] It is understandable that the main body 510 and the mounting plate 400 are spaced apart, so even if there is some water flow on the mounting plate 400, the water flow will not interfere with the use of the main body 510, and the safety factor of the circulation monitoring component 500 is higher. At the same time, the spaced arrangement between the main body 510 and the mounting plate 400 results in a larger heat dissipation area for the main body 510, better heat dissipation effect of the circulation monitoring component 500, and a longer service life.

[0047] Reference Figure 3 and Figure 4As shown, in some specific embodiments of this utility model, the connector 600 further includes a mounting ring 660 and a connecting strap 670. The mounting ring 660 is sleeved on the outer body 620, and the connecting strap 670 connects the mounting ring 660 and the cap 650. The mounting ring 660 and the second sealing ring 640 are connected as an integral structure.

[0048] It is understandable that even after the cap 650 detaches from the outer body 620, the cap 650 can still be connected to the outer body 620 via the connecting strap 670 and the mounting ring 660, making the cap 650 less likely to be lost. When subsequent wiring changes cause the connection port of the outer body 620 of the connector 600 to be no longer used, the cap 650 can still be easily located and used to seal and protect the connection port of the outer body 620. In this embodiment, the second sealing ring 640 and the mounting ring 660 are the same object, and the connecting strap 670 is essentially integrated into the second sealing ring 640, serving both a sealing function and a connection function with the connecting strap 670.

[0049] Reference Figure 1 and Figure 5 As shown, in some specific embodiments of this utility model, the high-voltage cable sheath circulating current online monitoring device further includes a power supply box 700. The power supply box 700 is connected to the mounting plate 400 and electrically connected to the circulating current monitoring component 500. The power supply box 700 includes a main box body 710 and a fixing strip 720. The middle part of the fixing strip 720 abuts against the side of the main box body 710 away from the mounting plate 400, and both ends of the fixing strip 720 are connected to the mounting plate 400 to fix the main box body 710 to the mounting plate 400.

[0050] In this embodiment, the circulating current monitoring component 500 is powered by a separate power supply box 700, making the use of the circulating current monitoring component 500 more reliable. The main housing 710 is a finished product, inherently achieving IP67 or IP65 waterproof rating. Therefore, the main housing 710 can be directly placed on the surface of the mounting plate 400 and secured by the fixing strip 720. When the battery in the main housing 710 degrades and needs replacement, the main housing 710 can be replaced simply by removing the fixing strip 720, making replacement convenient.

[0051] Reference Figure 1 and Figure 5 As shown, in some specific embodiments of this utility model, the high-voltage cable sheath circulating current online monitoring device further includes a mutual inductance power supply and a power adapter 800. The power adapter 800 is electrically connected to the mutual inductance power supply and is connected to the mounting plate 400. The mutual inductance power supply is used to mutually induct and draw power from the current in the cable.

[0052] In this embodiment, the principle of mutual inductance power extraction is as follows: an alternating magnetic field exists around the high-voltage conductor. The magnetic field around the busbar changes with the current in the high-voltage conductor, thereby generating an induced voltage through the induction energy extraction coil. This induced voltage is then transformed by the power extraction power module through rectification, filtering, and voltage regulation to ultimately power the equipment. The mutual inductance power supply is based on this principle. The power adapter 800 converts the output voltage of the mutual inductance power supply into a suitable voltage to adapt to the components in the device. The power adapter 800 includes a main body and a connecting part. The main body is spaced apart from the mounting plate 400, and the connecting part connects the main body and the mounting plate 400.

[0053] Reference Figure 5 As shown, in some specific embodiments of this utility model, the mounting part 130 includes a connecting plate part 131, a bending plate part 132, and a mounting plate part 133. The connecting plate part 131 is attached to and connected to the mounting side plate 120. The mounting plate part 133 extends toward the mounting cavity 101. The bending plate part 132 is connected between the connecting plate part 131 and the mounting plate part 133. The mounting plate part 133 is connected to the mounting plate 400.

[0054] In this embodiment, the mounting plate portion 133 extends into the mounting cavity 101, moving it away from the mounting side plate 120. This allows the mounting plate 400 to be spaced apart from the mounting side plate 120 when mounted on the mounting plate portion 133, effectively suspending it within the mounting cavity 101. The bent plate portion 132 provides deformation support, enhancing the overall structural strength of the mounting portion 130. One side of the connecting plate portion 131 is directly attached to and connected to the mounting side plate 120, resulting in a larger connection area between the connecting plate portion 131 and the mounting side plate 120, thus increasing the connection strength between the mounting portion 130 and the mounting side plate 120.

[0055] In some specific embodiments of this utility model, the high-voltage cable sheath circulating current online monitoring device further includes a data processing component and a wireless communication component. Both the data processing component and the wireless communication component are connected to the mounting plate 400. The data processing component is electrically connected to the circulating current monitoring component 500 and is used to process the data collected by the circulating current monitoring component 500. The wireless communication component is electrically connected to the data processing component and is used for wireless communication.

[0056] It is understandable that the data collected by the circulating current monitoring component 500 is stored and preprocessed by the data processing component, then converted into a signal and transmitted via the wireless communication component. This allows the terminal to receive the data from the circulating current monitoring component 500 and to understand the cable circulating current situation in a timely manner. The wireless communication component can transmit once every 24 hours to reduce energy consumption, or transmit at other time intervals.

[0057] Reference Figure 2 , Figure 3 and Figure 5 As shown, in some specific embodiments of this utility model, the online monitoring device for high-voltage cable sheath circulation also includes a water level detector 900. The water level detector 900 is disposed on the inner surface of the base plate 110 or on the side of the mounting plate 400 facing the base plate 110. The water level detector 900 is electrically connected to the data processing component.

[0058] It is understandable that when water seepage occurs inside the housing 100, the water flow will concentrate in the space between the base plate 110 and the mounting plate 400. The water level detector 900 detects the water level in this space to monitor whether the device is leaking. Specifically, a preset water level is set in the data processing component. When the water level detected by the water level detector 900 does not exceed the preset water level, the data processing component can send an early warning signal to the terminal via the wireless communication component, and no immediate emergency repair is required. When the water level exceeds the preset water level, the data processing component can send an emergency repair signal to the terminal via the wireless communication component, and emergency repairs need to be arranged.

[0059] Reference Figure 2 , Figure 3 and Figure 5 As shown, in some specific embodiments of this utility model, there are four water level detectors 900, which are respectively disposed at the four corners of the base plate 110.

[0060] It should be noted that in actual use, the device itself may not be able to remain horizontal. The tilt of the device will cause the gap between the base plate 110 and the mounting plate 400 to tilt relative to the horizontal plane, resulting in some parts of the gap being filled with water and others being empty, ultimately leading to inaccurate detection by the water level detector 900.

[0061] In this embodiment, the base plate 110 is a rectangular plate, and four water level detectors 900 are respectively located at the four corners of the base plate 110. When the tank 100 is tilted, water will accumulate at one corner of the base plate 110. The highest water level inside the tank 100 is determined by the highest water level detected by the four water level detectors 900. The data processing component compares the highest water level with a preset water level. If the highest water level exceeds the preset water level, the data processing component sends a repair signal through the wireless communication component, indicating that the device needs emergency repair. By setting multiple water level detectors 900, the accurate highest water level inside the tank 100 can be detected, thereby improving the accuracy of water level detection and accurately identifying the risk of water ingress and short circuit inside the tank 100, thus improving the safety of use.

[0062] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A high-voltage cable sheath circulating current online monitoring device, characterized in that, include: The housing has a mounting cavity and an opening communicating with the mounting cavity. The housing also includes a bottom plate, a mounting side plate connected to the bottom plate, and a mounting portion provided on the inner surface of the mounting side plate. The mounting side plate has mounting holes. A lid, connected to the box body, and covering the opening; The main sealing ring is located between the box body and the box cover. The main sealing ring is held together by the box body and the box cover and surrounds the opening. A mounting plate is disposed in the mounting cavity and connected to the mounting part, and the mounting plate is spaced apart from the base plate and the mounting side plate; A circulating current monitoring component is disposed on the mounting plate and is used to monitor the circulating current in the cable; A connector, passing through the mounting hole, includes an inner body located in the mounting cavity, an outer body located outside the housing, a first sealing ring, a second sealing ring, and a cap. The inner body is electrically connected to the circulating current monitoring component and has a first abutting surface. The first abutting surface, together with the inner surface of the mounting side plate, clamps the first sealing ring. The outer body is used to connect a cable and has a second abutting surface. The second abutting surface, together with the outer peripheral surface of the mounting side plate, clamps the second sealing ring. The cap seals and covers the outer body.

2. The online monitoring device for circulating current in high-voltage cable sheaths according to claim 1, characterized in that: The mounting plate is placed on the top surface of the mounting part.

3. The online monitoring device for circulating current in high-voltage cable sheaths according to claim 1, characterized in that: The circulation monitoring component includes a main body and a connecting part, the main body being spaced apart from the mounting plate, and the connecting part being connected between the main body and the mounting plate.

4. The online monitoring device for circulating current in high-voltage cable sheaths according to claim 1, characterized in that: The connector also includes a mounting ring and a connecting strap. The mounting ring is sleeved on the outer body, and the connecting strap connects the mounting ring and the cap. The mounting ring and the second sealing ring are connected as an integral structure.

5. The online monitoring device for circulating current in high-voltage cable sheaths according to claim 1, characterized in that, Also includes: A power supply box is connected to the mounting plate and electrically connected to the circulating current monitoring component. The power supply box includes a main body and a fixing strip. The middle part of the fixing strip abuts against the side of the main body away from the mounting plate, and both ends of the fixing strip are connected to the mounting plate to fix the main body to the mounting plate.

6. The online monitoring device for circulating current in high-voltage cable sheaths according to claim 1, characterized in that, Also includes: A mutual inductance power supply and a power adapter, wherein the power adapter is electrically connected to the mutual inductance power supply and is connected to the mounting plate, and the mutual inductance power supply is used to draw power from the current in the cable.

7. The online monitoring device for circulating current in high-voltage cable sheaths according to claim 1, characterized in that: The mounting portion includes a connecting plate portion, a bending plate portion, and a mounting plate portion. The connecting plate portion is attached to and connected to the mounting side plate. The mounting plate portion extends toward the mounting cavity. The bending plate portion connects the connecting plate portion and the mounting plate portion. The mounting plate portion is connected to the mounting plate.

8. The online monitoring device for circulating current in high-voltage cable sheaths according to claim 1, characterized in that: It also includes a data processing component and a wireless communication component, both of which are connected to the mounting plate. The data processing component is electrically connected to the circulating current monitoring component and is used to process data. The wireless communication component is electrically connected to the data processing component and is used for wireless communication.

9. The online monitoring device for circulating current in high-voltage cable sheaths according to claim 8, characterized in that, Also includes: A water level detector is disposed on the inner surface of the base plate and is electrically connected to the data processing component.

10. The online monitoring device for circulating current in high-voltage cable sheaths according to claim 9, characterized in that: The number of water level detectors is four, and the four water level detectors are respectively set at the four corners of the base plate.

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