Cable on-line monitoring device

Abstract

The utility model discloses a cable on-line monitoring device, which relates to the technical field of cable detection and comprises a master station, substations and a data acquisition terminal, the master station is communicated with each substation, the substations are communicated with each terminal, and the data acquisition terminal is used for acquiring discharge information of a cable. According to the application, the plurality of groups of partial discharge sensors and the ring current sensors are communicated with the substations, the information of the cable acquired by the plurality of groups of partial discharge sensors and ring current sensors is transmitted to the substations, and the plurality of groups of substations are connected through the main station and are managed uniformly, so that the partial discharge and grounding ring current conditions of the middle-high voltage cable can be monitored online in real time; compared with separate detection of each detection point, the method saves manpower, optimizes the management level of the cable, and can achieve the timely discovery and processing of a condition when the condition occurs.

Description

Technical Field

[0001] The utility model relates to the technical field of cable detection, in particular to an online cable monitoring device. Background Art

[0002] Medium and high voltage cables are core assets of power systems, railways, industrial and mining enterprises, etc. When a cable fails, the cable line will be out of power and it will be difficult to restore power in a short time, affecting the normal operation of power, railway and other systems. In serious cases, safety accidents will occur, which will not only cause huge economic losses, but also cause adverse social impacts. Real-time status monitoring of cables, real-time data collection and analysis and diagnosis can effectively warn of potential problems in advance and prevent them before they happen.

[0003] A cable sheath circulation monitoring device is disclosed in Chinese patent publication number CN220399474U, comprising a monitoring shell, a cover plate is arranged on the front of the monitoring shell, a heat dissipation mechanism is arranged on the back of the monitoring shell, a handle is arranged on the top of the monitoring shell, mounting mechanisms are arranged on the left and right sides of the monitoring shell, a plurality of groups of wiring heads are arranged on the bottom of the monitoring shell, and wiring holes are opened at positions corresponding to the wiring heads at the bottom of the monitoring shell; the heat dissipation mechanism comprises a heat dissipation cover, a heat conduction plate, heat dissipation fins, a heat dissipation fan and air suction holes, a heat dissipation cover is arranged on the back of the monitoring shell, and a heat conduction plate is arranged inside the heat dissipation cover and on the back of the monitoring shell. Compared with the existing cable sheath circulation monitoring device, the utility model can improve the overall heat dissipation, applicability and practicality of the cable sheath circulation monitoring device through design.

[0004] The above patent has monitoring limitations and cannot remotely detect partial discharge and ground loop current of the cable, which is not conducive to the unified management of cable information. Utility Model Content

[0005] The utility model provides a cable online monitoring device to solve the problems raised in the background technology.

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A cable online monitoring device comprises a main station, a substation and a data acquisition terminal. The main station communicates with each substation, and the substation communicates with each terminal. The data acquisition terminal is used to collect discharge information of the cable.

[0008] Preferably, the main station communicates with each substation using at least one of 4G components and optical fiber / Ethernet components.

[0009] Preferably, the substation communicates with each terminal using RS485 bus.

[0010] Preferably, the data acquisition terminal comprises a partial discharge sensor and a circulating current sensor, three groups of the partial discharge sensor and the circulating current sensor are provided, and each group of the partial discharge sensor and the circulating current sensor is respectively connected to one phase of the three-phase cable.

[0011] Preferably, the partial discharge sensor and the circulating current sensor are provided at the combined phase short-circuit grounding terminal of the three-phase cable.

[0012] Preferably, the partial discharge sensor and the circulating current sensor are both two groups of semi-annular structures, and each group of semi-annular structures of the partial discharge sensor and the circulating current sensor is connected to the cable through a clamping assembly.

[0013] Preferably, the snap-on assembly includes a first connecting member and a second connecting member, the first connecting member and the second connecting member are semi-annular, and one end of the first connecting member and the second connecting member are rotatably connected via a first rotating shaft, a flexible connecting plate is provided on the inner side of the first connecting member and the second connecting member, a connecting block is fixedly connected to the flexible connecting plate, an adjusting bolt is rotatably connected to the connecting block, the adjusting bolt passes through the first connecting member and the second connecting member, and the adjusting bolt is threadedly connected to the first connecting member and the second connecting member.

[0014] Preferably, both ends of the flexible connecting plate are fixedly connected with ferrules, and a sensor installation position is formed between the ferrule and the flexible connecting plate.

[0015] Preferably, the other end of the second connecting member is fixedly connected to the first fixing ear, and the other end of the first connecting member is fixedly connected to the second fixing ear, and the first fixing ear and the second fixing ear are both provided with notches, and a fastening bolt is rotatably connected to the notch of the first fixing ear through the second rotating shaft, a fastening sleeve is sleeved on the fastening bolt, and a nut is threadedly connected to the fastening bolt, and the nut is located at one end of the fastening sleeve away from the second rotating shaft;

[0016] A groove is arranged on the surface of the second fixing ear, and a convex surface adapted to the groove is arranged at one end of the fastening sleeve.

[0017] Preferably, a limiting block is fixedly connected to the fastening bolt;

[0018] A rotating lug is fixedly connected to the nut.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] The present application enables multiple groups of local discharge sensors and circulating current sensors to communicate with substations, transmits the cable information collected by the multiple groups of local discharge sensors and circulating current sensors to the substations, and connects the multiple groups of substations through the main station for unified management. It can monitor the local discharge and grounding loop current of medium and high voltage cables in real time online, so as to promptly discover potential fault points. Compared with separate detection of each detection point, it saves manpower, optimizes the cable management level, and can promptly discover and deal with problems when they occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the clamping assembly of the utility model;

[0023] Figure 3 It is a schematic diagram of the fixing ear structure of the utility model.

[0024] In the figure: 1. main station; 2. substation; 3. data acquisition terminal; 4. first connecting piece; 5. second connecting piece; 6. sensor mounting position; 7. flexible connecting plate; 8. ferrule; 9. adjusting bolt; 10. connecting block; 11. first rotating shaft; 12. first fixing ear; 13. second fixing ear; 14. second rotating shaft; 15. groove; 16. fastening bolt; 17. fastening sleeve; 18. convex surface; 19. nut; 20. rotating dial ear; 21. limit block; 22. notch. DETAILED DESCRIPTION

[0025] In the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present utility model. They are only used to distinguish the protective components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0026] Example 1

[0027] See also Figure 1 A cable online monitoring device includes a main station 1, a substation 2 and a data acquisition terminal 3. The main station 1 communicates with each substation 2, and the substation 2 communicates with each terminal. The data acquisition terminal 3 is used to collect discharge information of the cable.

[0028] Preferably, the main station 1 communicates with each substation 2 using at least one of 4G components and optical fiber / Ethernet components.

[0029] Preferably, the substation 2 communicates with each terminal using an RS485 bus.

[0030] The main station 1 includes a cloud platform and a client terminal, and the cloud platform and the client terminal are connected via a wireless communication component, such as a 4G / 5G component, and the client terminal is at least one of a PC or a mobile phone;

[0031] Among them, substation 2 adopts an embedded operating system, collects data from data acquisition terminal 3, and transmits it to the platform through the network, with three core functions: data collection, transmission, and storage;

[0032] The storage function of substation 2 is performed by using a TF card for storage;

[0033] Among them, the data acquisition terminal 3 includes a power supply component, a communication component, and a data storage component;

[0034] The power supply component provides power to the communication component and the data storage component;

[0035] The data storage component is TF card storage;

[0036] The power supply component uses a DC power output with a voltage of 24V and a current of 1A;

[0037] Preferably, the data acquisition terminal 3 includes a partial discharge sensor and a circulating current sensor, and three groups of the partial discharge sensor and the circulating current sensor are provided, and each group of the partial discharge sensor and the circulating current sensor is respectively connected to one phase of the three-phase cable.

[0038] Preferably, the partial discharge sensor and the circulating current sensor are provided at the combined phase short-circuit grounding terminal of the three-phase cable.

[0039] Among them, the detection connection of the circulating current sensor can refer to Chinese patent application No. 202322306932.6 A high-voltage cable circulating current monitoring device;

[0040] Among them, the partial discharge sensor detection connection can refer to Chinese patent application No. 202321691249.2 Power cable temperature and partial discharge comprehensive monitoring system.

[0041] The working principle and beneficial effects of the above scheme:

[0042] The present application enables multiple groups of local discharge sensors and circulating current sensors to communicate with substation 2, transmits the cable information collected by the multiple groups of local discharge sensors and circulating current sensors to substation 2, and connects the multiple groups of substations 2 through the main station 1 for unified management. It can monitor the local discharge and grounding loop current of medium and high voltage cables in real time online, so as to timely discover potential fault points. Compared with separate detection of each detection point, it saves manpower, optimizes the cable management level, and can promptly discover and deal with problems when they occur.

[0043] Example 2

[0044] See also Figure 2-3 On the basis of Example 1, the partial discharge sensor and the circulating current sensor are both two groups of semi-annular structures, and each group of semi-annular structures of the partial discharge sensor and the circulating current sensor is connected to the cable through a clamping assembly.

[0045] Preferably, the snap-on assembly includes a first connecting member 4 and a second connecting member 5, the first connecting member 4 and the second connecting member 5 are semi-annular, and one end of the first connecting member 4 and the second connecting member 5 are rotatably connected through a first rotating shaft 11, and a flexible connecting plate 7 is provided on the inner side of the first connecting member 4 and the second connecting member 5, a connecting block 10 is fixedly connected to the flexible connecting plate 7, and an adjusting bolt 9 is rotatably connected to the connecting block 10, the adjusting bolt 9 passes through the first connecting member 4 and the second connecting member 5, and the adjusting bolt 9 is threadedly connected to the first connecting member 4 and the second connecting member 5.

[0046] Preferably, both ends of the flexible connecting plate 7 are fixedly connected with a clamping sleeve 8 , and a sensor installation position 6 is formed between the clamping sleeve 8 and the flexible connecting plate 7 .

[0047] Preferably, the other end of the second connecting member 5 is fixedly connected to the first fixing ear 12, and the other end of the first connecting member 4 is fixedly connected to the second fixing ear 13. The first fixing ear 12 and the second fixing ear 13 are both provided with a notch 22. A fastening bolt 16 is rotatably connected in the notch 22 of the first fixing ear 12 through the second rotating shaft 14. A fastening sleeve 17 is sleeved on the fastening bolt 16. A nut 19 is threadedly connected to the fastening bolt 16. The nut 19 is located at one end of the fastening sleeve 17 away from the second rotating shaft 14.

[0048] A groove 15 is provided on the surface of the second fixing ear 13 , and a convex surface 18 adapted to the groove 15 is provided at one end of the fastening sleeve 17 .

[0049] Preferably, a limit block 21 is fixedly connected to the fastening bolt 16;

[0050] The nut 19 is fixedly connected with a rotating lug 20 .

[0051] The working principle and beneficial effects of the above scheme:

[0052] Install the semi-circular sensor in the sensor installation position 6, and sleeve the first connecting piece 4 and the second connecting piece 5 on the outside of the cable, rotate the nut 19, squeeze the convex surface 18 of the fastening sleeve 17 into the groove 15 of the second fixing ear 13, tighten the first connecting piece 4 and the second connecting piece 5, and rotate the adjusting bolt 9 to make the sensor in the sensor installation position 6 fit the cable, reduce the error of sensor detection, and adjust the position of the sensor installation position 6 by adjusting the adjusting bolt 9, which can adapt to different types of cables and increase practicality;

[0053] The fastening bolt 16 is rotatably connected to the first fixing ear 12 and can be rotated until the fastening sleeve 17 is located at the second fixing ear 13, which simplifies the installation and disassembly steps and makes subsequent maintenance more convenient;

[0054] The setting of the limit block 21 prevents the nut 19 from being screwed out of the fastening bolt 16, causing the nut 19 to be lost;

[0055] The arrangement of the rotating lug 20 facilitates the operation of the nut 19 without tools, which is convenient and quick.

[0056] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A cable online monitoring device, characterized in that: It comprises a main station (1), a substation (2) and a data acquisition terminal (3), wherein the main station (1) communicates with each substation (2), the substation (2) communicates with each terminal, and the data acquisition terminal (3) is used to collect discharge information of the cable; The data acquisition terminal (3) comprises a partial discharge sensor and a circulating current sensor, wherein three groups of the partial discharge sensor and the circulating current sensor are provided, and each group of the partial discharge sensor and the circulating current sensor is respectively connected to one phase of the three-phase cable; The partial discharge sensor and the circulating current sensor are provided at the short-circuit grounding terminal of the three-phase cable; The partial discharge sensor and the circulating current sensor are both two groups of semi-annular structures, and each group of semi-annular structures of the partial discharge sensor and the circulating current sensor is connected to the cable through a clamping assembly.

2. A cable online monitoring device according to claim 1, characterized in that: The main station (1) communicates with each substation (2) using at least one of a 4G component and an optical fiber / Ethernet component.

3. A cable online monitoring device according to claim 1, characterized in that: The substation (2) communicates with each terminal using the RS485 bus.

4. A cable online monitoring device according to claim 1, characterized in that: The clamping assembly comprises a first connecting member (4) and a second connecting member (5), the first connecting member (4) and the second connecting member (5) are semi-annular, and one end of the first connecting member (4) and the second connecting member (5) are rotatably connected via a first rotating shaft (11), a flexible connecting plate (7) is arranged inside the first connecting member (4) and the second connecting member (5), a connecting block (10) is fixedly connected to the flexible connecting plate (7), an adjusting bolt (9) is rotatably connected to the connecting block (10), the adjusting bolt (9) passes through the first connecting member (4) and the second connecting member (5), and the adjusting bolt (9) is threadedly connected to the first connecting member (4) and the second connecting member (5).

5. A cable online monitoring device according to claim 4, characterized in that: Both ends of the flexible connection plate (7) are fixedly connected with clamping sleeves (8), and a sensor installation position (6) is formed between the clamping sleeve (8) and the flexible connection plate (7).

6. A cable online monitoring device according to claim 5, characterized in that: The other end of the second connecting member (5) is fixedly connected to the first fixing ear (12), and the other end of the first connecting member (4) is fixedly connected to the second fixing ear (13). The first fixing ear (12) and the second fixing ear (13) are both provided with notches (22). A fastening bolt (16) is rotatably connected in the notch (22) of the first fixing ear (12) via a second rotating shaft (14). A fastening sleeve (17) is sleeved on the fastening bolt (16). A nut (19) is threadedly connected to the fastening bolt (16). The nut (19) is located at one end of the fastening sleeve (17) away from the second rotating shaft (14). A groove (15) is arranged on the surface of the second fixing ear (13), and a convex surface (18) adapted to the groove (15) is arranged on one end of the fastening sleeve (17).

7. A cable online monitoring device according to claim 6, characterized in that: A limit block (21) is fixedly connected to the tightening bolt (16); A rotating lug (20) is fixedly connected to the nut (19).

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