Mining flame-proof high-voltage cable connecting and monitoring early warning device

Abstract

The utility model discloses a mining explosion-proof high-voltage cable connecting and monitoring early warning device, which comprises a cable connector cavity and a monitoring early warning cavity which are arranged in an explosion-proof shell, the two cavities are isolated by a middle partition plate, a cable lead-in device is arranged outside the cable connector cavity, and the middle partition plate is communicated through an explosion-proof middle terminal; a cable connector is arranged in the cable connector cavity, cables at the two ends are led into the cable connector cavity through cable leading-in devices, and a monitoring control panel is installed in the monitoring and early warning cavity. The monitoring control panel realizes signal processing and over-limit early warning functions of temperature, humidity and partial discharge signals; the monitoring and early warning cavity display panel displays the temperature, the temperature change, the humidity and the humidity change in the cable connection cavity in real time, and transmits data to the upper computer through the monitoring and early warning cavity external explosion-proof wiring terminal at the same time, so that unified early warning management of the multi-position and multi-point cable connector is realized. According to the utility model, high-voltage explosion-proof cable connection is realized, real-time monitoring and early warning are carried out on temperature, humidity, partial discharge and the like of the cable wiring cavity, sudden faults of the cable connector are avoided, early warning can be carried out on the sudden faults in advance, and normal operation of cable connection among equipment is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of mine cable connection and monitoring, in particular to the connection of mine flameproof high-voltage cables and monitoring of the working conditions and use environment of the high-voltage cables, such as temperature, humidity, partial discharge, etc. Background Art

[0002] Commonly used flameproof high-voltage cable connectors for mining are primarily used in coal mines and in environments exposed to explosive gas mixtures such as coal dust and methane. In power systems, they serve as connectors between control cables and flameproof electrical switchgear. They can also be used as connectors for information and communication cables in coal mines. They should provide the same long-term safe operation and service life as the cable itself.

[0003] However, the lack of effective monitoring of cable connectors, the complex underground coal mine environment, and the compliance of cable connector manufacturing have a direct impact on the stable operation of cables. A series of issues, such as whether the connection is stable, whether there is fault current impact, whether the operating temperature and humidity meet the standards, and whether the mechanical strength and insulation performance are good, directly affect the quality of cable connections and the normal operation of coal mine equipment.

[0004] When installing cables on site, existing devices often cannot meet the requirements of connecting the cables and simultaneously monitoring the cables. Summary of the Invention

[0005] The purpose of the utility model is to provide a mining flameproof high-voltage cable connection and monitoring and early warning device, which can realize the connection of high-voltage explosion-proof cables and at the same time perform real-time monitoring and early warning of the temperature, humidity, partial discharge, etc. of the cable connection cavity, avoid the occurrence of sudden failures of the cable connector, and provide early warning of sudden failures to ensure the normal operation of the cable connection between various devices.

[0006] To achieve the above objectives, the present invention adopts the following technical solutions: a flameproof high-voltage cable connection and monitoring and early warning device for mining, comprising an explosion-proof housing, characterized in that a cable connector cavity and a monitoring and early warning cavity are provided within the explosion-proof housing, the two cavities are separated by an intermediate partition, a cable entry device is provided outside the cable connector cavity, and the intermediate partition is connected via an explosion-proof intermediate terminal;

[0007] A cable connector is provided in the cable connector cavity. The cable connector consists of a cable connector connecting flange, a cable connector insulator, and a cable connector terminal cavity. The cable connector flanges on both sides are connected to the cable entry device flange by bolts. The male ports of the cable terminals on both sides are connected to the female ports of the cable connector terminal cavity. A cable connector insulator is provided in the middle of the cable connector. The insulator is provided with a number of through holes, and the phase line plug sleeves are inserted into the through holes.

[0008] A temperature and humidity sensor bracket is also provided inside the cable connector cavity. The temperature and humidity monitoring sensor is arranged in the cable connector cavity through the temperature and humidity sensor bracket to monitor the temperature and humidity changes in the cable connector cavity;

[0009] The cables at both ends are introduced into the cable connector cavity through cable entry devices. The main cable core wire, grounding shield wire, and monitoring shield wire are connected to the cable connector through the cable entry devices respectively. A set of partial discharge monitoring sensors are installed on each of the cables at both ends and are connected to the monitoring control board of the monitoring and early warning cavity through the flameproof intermediate terminal.

[0010] A monitoring control board and a mine-use flameproof and intrinsically safe DC regulated power supply are installed inside the monitoring and early warning chamber. A data acquisition module, a data processing module and a fault early warning module are provided on the monitoring and control board. The acquisition module collects the partial discharge signals and temperature and humidity signals of the partial discharge monitoring sensor and the temperature and humidity monitoring sensor, and performs data processing and analysis, and displays the real-time data and fault indicators on the display panel of the monitoring and early warning chamber. The partial discharge, temperature and humidity inside the cable connector cavity are monitored through the characteristic data fault algorithm. If an abnormal signal occurs, a fault warning and abnormal information diagnosis are carried out in time. Each cable connector monitoring and control board is attached with relevant physical address information. If an abnormal monitoring signal occurs, the fault abnormality information is promptly reflected on the display panel of the monitoring and early warning chamber, and the data is simultaneously transmitted to the host computer through the external explosion-proof terminal of the monitoring and early warning chamber to reflect the current fault location information to the management personnel and the centralized control center for timely inspection and maintenance, so as to realize unified early warning management of cable connectors at multiple locations and points.

[0011] Furthermore, the cable entry device includes a cable connector outlet, a cable terminal, a cable connector outlet insulator, a cable entry device flange, a cable entry device shell, and a cable entry device pressure plate; the cable entry device flange and the explosion-proof shell are fixed by bolts, and the cables at both ends are inserted into the mounting holes of the cable entry device pressure plate through the cable entry device shell and tightened with tensioning bolts to ensure a reliable connection of the cables. The cable terminal is fixed at the end of each phase line of the cable, and is inserted into the main core wire hole of the cable on the insulator of the cable connector outlet, and is fixed with pressure plate bolts.

[0012] Furthermore, multiple explosion-proof wiring terminals are provided on both sides of the monitoring and early warning cavity, and the network cable and the power cable are connected to the monitoring and early warning cavity through the explosion-proof wiring terminals to realize the transmission of monitoring data inside the monitoring and early warning cavity.

[0013] Furthermore, the mining flameproof and intrinsically safe DC regulated power supply supplies power to the monitoring and control board.

[0014] The beneficial effects of the utility model are:

[0015] 1. Reasonable structural design. No need to pour water when the cable entry device is connected to the cable socket;

[0016] 2. Partial discharge monitoring, temperature and humidity monitoring devices monitor the cable operation status in real time and provide early warning of sudden faults;

[0017] 3. The electrical clearance and creepage distance of the plug insulation and socket insulation meet the requirements of GB3836;

[0018] 4. Combine the mining high-voltage cable connector with the real-time cable fault monitoring to realize the fault monitoring and early warning functions while realizing the high-voltage cable connection;

[0019] 5. By assigning address information to each group of mining flameproof high-voltage cable connections and monitoring and early warning devices, the fault location and fault information can be quickly determined. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the external structure of the box of the monitoring and early warning device of the utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the box of the monitoring and early warning device of the utility model;

[0022] Figure 3 This is a structural diagram of the cable entry device of the utility model;

[0023] Figure 4 It is a schematic diagram of the cable connector structure;

[0024] Figure 5 yes Figure 4 sectional view of

[0025] Figure 6 This is a schematic diagram of the temperature and humidity sensor bracket;

[0026] Figure 7 This is the monitoring principle diagram of the monitoring and early warning device;

[0027] Explanation of the accompanying numbers: 1- explosion-proof cover of cable connector cavity, 2- cable entry device, 3- explosion-proof terminal blocks, 4- display panel of monitoring and early warning cavity, 5- hinge, 6- explosion-proof shell, 7- cable connector cavity, 8- cable connector, 9- partial discharge monitoring sensor, 10- explosion-proof and intrinsically safe DC regulated power supply for mining, 11- explosion-proof intermediate terminal, 12- monitoring and early warning cavity, 13- monitoring control board, 14- explosion-proof cover of monitoring and early warning cavity, 15- temperature and humidity monitoring sensor, 16- cable line, 17- cable connector outlet, 18- cable terminal blocks, 19- insulator of cable connector outlet, 20- cable entry device flange, 21- entry device housing, 22- cable entry device pressure plate, 23- pressure plate screw, 24- tensioning bolt, 25- cable connector connecting flange, 26- cable connector insulator, 27- cable connector terminal cavity, 28- temperature and humidity sensor bracket. DETAILED DESCRIPTION

[0028] The following is a further detailed description of the mining flameproof high-voltage cable connection and monitoring and early warning device of the present invention with reference to the accompanying drawings. It should be understood that the following embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0029] like Figure 1 and Figure 2 As shown, this embodiment discloses a mining explosion-proof high-voltage cable connection and monitoring and early warning device, including an explosion-proof shell 6, in which a cable connector cavity 7 and a monitoring and early warning cavity 12 are provided, and the cable connector cavity explosion-proof cover 1 and the monitoring and early warning cavity explosion-proof cover 14 are connected by a hinge 5.

[0030] The explosion-proof housing 6 is connected to the explosion-proof cover plate 1 of the cable connector cavity and the explosion-proof cover plate 14 of the monitoring and early warning cavity by bolts, and the joint surfaces are provided with sealing grooves to prevent dust and impurities from entering the cavity.

[0031] A cable connector 8, a partial discharge monitoring sensor 9, a flameproof intermediate terminal 11 and a temperature and humidity monitoring sensor 15 are provided in the cable connector cavity 7; a cable introduction device 2 is provided outside.

[0032] like Figure 3 、 Figure 4 and Figure 5As shown, a cable connector 8 is provided in the cable connector cavity 7, and the cable connector 8 consists of a cable connector connecting flange 25, a cable connector insulator 26, and a cable connector terminal cavity 27; the cable connector flanges 25 on both sides are connected to the cable entry device flange 20 by bolts, and the male ports of the cable terminals 18 on both sides are connected to the female ports of the cable connector terminal cavity 27. A cable connector insulator 26 is provided in the middle of the cable connector, and a plurality of through holes are provided on the insulator 26. Phase line plug insulating sleeves are inserted into the through holes. The connection between the insulator and the shell adopts an internal fixing method to avoid communication with the outside world.

[0033] A temperature and humidity sensor bracket 28 is also provided inside the cable connector cavity 7. Figure 6 As shown, the temperature and humidity sensor 15 is arranged in the cable connector cavity 7 through the temperature and humidity sensor bracket 28 to monitor the temperature changes in the cable connector cavity.

[0034] The explosion-proof cover 14 of the monitoring and early warning cavity is provided with a monitoring and early warning cavity display panel 4, which displays the monitored temperature, humidity, partial discharge and other detection data in real time and issues relevant fault warnings through sound, light and the like.

[0035] Several explosion-proof terminal blocks 3 are designed on both sides of the monitoring and early warning cavity 12. Network cables and power cables can be connected to the monitoring and early warning cavity 12 through the explosion-proof terminal blocks 3. By assigning address information to each group of mining flameproof high-voltage cables connected to the monitoring and early warning device, the fault location and fault information can be quickly determined.

[0036] like Figure 2 As shown, a set of partial discharge monitoring sensors 9 are installed on each of the cables 16 at both ends, and are connected to the monitoring control board 13 of the monitoring and early warning chamber 12 through the flameproof intermediate terminal 11.

[0037] A monitoring control board 13 and a mine flameproof and intrinsically safe DC regulated power supply 10 are installed inside the monitoring and early warning chamber 12. A data acquisition module, a data processing module, and a fault early warning module are provided on the monitoring and control board 13.

[0038] like Figure 7As shown, the explosion-proof high-voltage cable connection and monitoring and early warning device for mining also includes a monitoring system, which is mainly divided into monitoring hardware and data acquisition module, data processing module and fault early warning module. The monitoring hardware mainly includes: monitoring and early warning cavity display panel 4, partial discharge monitoring sensor 9, monitoring control board 13, temperature and humidity monitoring sensor 15, etc. The main functions of each module are realized through the monitoring control board 13. The monitoring control board 13 is provided with a data acquisition terminal to collect temperature signals, humidity signals, partial discharge signals, etc. collected by sensors such as partial discharge monitoring sensor 9 and temperature and humidity monitoring sensor 15, and perform data processing and analysis, and display real-time data and fault indicators on the monitoring and early warning cavity display panel 4, and monitor the partial discharge, temperature and humidity inside the cable connector cavity through the characteristic data fault algorithm. If a signal abnormality occurs, a fault warning is promptly issued and abnormal information diagnosis is performed. Each cable connector monitoring and control panel 13 is attached with relevant physical address information. If an abnormal detection signal occurs, the fault abnormality information can be promptly reflected on the monitoring and early warning chamber display panel 4, and the data can be simultaneously transmitted to the host computer through the external explosion-proof terminal 3 of the monitoring and early warning chamber, and the current fault location information can be reported to the management personnel and the centralized control center for timely inspection and maintenance, thereby realizing unified early warning management of multiple cable connectors 8 at multiple locations and points.

[0039] The mining flameproof and intrinsically safe DC regulated power supply 10 supplies power to the monitoring and control board 13 .

[0040] While achieving high-voltage mining cable connections, the present invention also provides early warning and monitoring of the high-voltage cable connection status and faults, including but not limited to temperature, humidity, and partial discharge signals. The cable connector 8 utilizes a phase-insulated plug, eliminating the need for glue filling the electrical gaps between the socket and plug insulation. The electrical gaps and creepage distances on the socket insulation and the plug insulation both meet the national standard GB3836.

Claims

1. A flameproof high-voltage cable connection and monitoring early warning device for mining, comprising an explosion-proof housing (6), characterized in that: A cable connector cavity (7) and a monitoring and warning cavity (12) are provided in the explosion-proof housing (6), and the two cavities are isolated by a middle partition. A cable introduction device (2) is provided outside the cable connector cavity (7), and the middle partition is connected via an explosion-proof intermediate terminal (11); A cable connector (8) is provided in the cable connector cavity (7), and the cable connector (8) is composed of a cable connector connecting flange (25), a cable connector insulator (26), and a cable connector terminal cavity (27); the cable connector flanges (25) on both sides are connected to the cable entry device flange (20) by bolts, and the male ports of the cable terminals (18) on both sides are connected to the female ports of the cable connector terminal cavity (27); a cable connector insulator (26) is provided in the middle of the cable connector, and a plurality of through holes are provided on the insulator (26), and phase line plug insulating sleeves are inserted into the through holes; A temperature and humidity sensor bracket (28) is further provided inside the cable connector cavity (7), and the temperature and humidity monitoring sensor (15) is arranged in the cable connector cavity (7) through the temperature and humidity sensor bracket (28) to monitor temperature and humidity changes in the cable connector cavity; The cables (16) at both ends are introduced into the cable connector cavity (7) through the cable introduction device (2), and the main cable core wire, the grounding shield wire and the monitoring shield wire are respectively connected to the cable connector (8) through the cable introduction device (2); a set of partial discharge monitoring sensors (9) are installed on each of the cables (16) at both ends, and are connected to the monitoring control board (13) of the monitoring early warning cavity (12) through the flameproof intermediate terminal (11); A monitoring control board (13) and a mine flameproof and intrinsically safe DC regulated power supply (10) are installed inside the monitoring and early warning chamber (12). A data acquisition module, a data processing module and a fault early warning module are provided on the monitoring and early warning chamber (13); the acquisition module acquires the partial discharge signals and the temperature and humidity signals of the partial discharge monitoring sensor (9) and the temperature and humidity monitoring sensor (15), and performs data processing and analysis, and displays the real-time data and fault indicators on the monitoring and early warning chamber display panel (4), and monitors the partial discharge and the temperature and humidity inside the cable connector cavity through the characteristic data fault algorithm. If an abnormal signal occurs, a fault early warning and abnormal information diagnosis are carried out in time; each cable connector monitoring and control board (13) is attached with relevant physical address information. If an abnormal monitoring signal occurs, the fault abnormal information is reflected in time on the monitoring and early warning chamber display panel (4), and the data is simultaneously transmitted to the host computer through the external explosion-proof terminal (3) of the monitoring and early warning chamber to reflect the current fault location information to the management personnel and the centralized control center, so that timely inspection and maintenance can be carried out, thereby realizing unified early warning management of multiple cable connectors (8) at multiple locations.

2. The flameproof high-voltage cable connection and monitoring and early warning device for mining according to claim 1, characterized in that: The cable entry device (2) comprises a cable connector outlet (17), a cable terminal (18), a cable connector outlet insulator (19), a cable entry device flange (20), a cable entry device housing (21), and a cable entry device pressure plate (22); the cable entry device flange (20) is fixed to the explosion-proof housing (6) by bolts, the cables (16) at both ends pass through the cable entry device housing (21) and are inserted into the mounting holes of the cable entry device pressure plate (22), and are tightened with tensioning bolts (24) to ensure that the cables are connected reliably, the cable terminal (18) is fixed at the end of each phase line of the cable, and is inserted into the main core wire hole of the cable on the cable connector outlet insulator (19), and is connected and fixed with pressure plate bolts (23).

3. The flameproof high-voltage cable connection and monitoring and early warning device for mining according to claim 1, characterized in that: Multiple explosion-proof wiring terminals (3) are provided on both sides of the monitoring and early warning cavity (12), and network cables and power cables are connected to the monitoring and early warning cavity (12) through the explosion-proof wiring terminals (3) to realize the transmission of monitoring data inside the monitoring and early warning cavity (12).

4. The flameproof high-voltage cable connection and monitoring and early warning device for mining according to claim 1, characterized in that: The mining flameproof and intrinsically safe DC regulated power supply (10) supplies power to the monitoring control board (13).

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