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

Abstract

The invention 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 high-voltage explosion-proof cable connector, the temperature, humidity, partial discharge and the like of the cable wiring cavity are monitored and early warned in real time while high-voltage explosion-proof cable connection is achieved, 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 guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of mining cable connection and monitoring, and specifically relates to the connection of mining flameproof high-voltage cables, and monitors the working 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 mainly used in coal mines and in environments with explosive gas mixtures such as coal dust and methane. In power systems, they are used as connection devices between control cables and flameproof electrical switchgear. They can also be used as information and communication cable connectors in coal mines. They should be able to operate safely for a long time like the cable body and have the same service life as the cable.

[0003] However, the lack of effective monitoring of cable connectors, the complex environment of cable joints in coal mines, and the compliance of cable joints have a direct impact on the stable operation of cables. Whether the connection is stable, whether there is a fault current shock, whether the ambient temperature and humidity meet the standards, whether the mechanical strength and insulation performance are good, etc. 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 present invention is to provide a flameproof high-voltage cable connection and monitoring and early warning device for mining, 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 object, the present invention adopts the following technical scheme: 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 in the explosion-proof housing, the two cavities are separated by a middle partition, a cable introduction device is provided outside the cable connector cavity, and the middle partition is connected through an explosion-proof intermediate terminal;

[0007] A cable connector is arranged in the cable connector cavity, and the cable connector is composed 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 flanges by bolts, and the male ports of the cable terminals on both sides are connected to the cable connector terminal cavity and the female ports. The cable connector is provided with a cable connector insulator in the middle, and the insulator is provided with a plurality of through holes, and the through holes are inserted with phase line plug insulating sleeves;

[0008] The cable connector cavity is also provided with a temperature and humidity sensor bracket inside, and the temperature and humidity 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 the cable introduction device, and the main cable core wire, grounding shield wire and monitoring shield wire are connected to the cable connector through the cable introduction device 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 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 arranged on the monitoring and control board. The acquisition module collects the partial discharge signals and temperature and humidity signals collected by 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 abnormal fault 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, and the current fault location information is reflected 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 introduction device comprises a cable connector outlet, a cable terminal, a cable connector outlet insulator, a cable introduction device flange, a cable introduction device shell, and a cable introduction device pressure plate; the cable introduction 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 introduction device pressure plate through the cable introduction device shell, and are tightened with tensioning bolts to ensure reliable connection of the cables, and the cable terminal is fixed at the ends 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 connected and 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 network cables and power cables 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 present invention 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 for 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 monitoring of cable faults 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 It is a schematic diagram of the external structure of the housing of the monitoring and early warning device of the present invention;

[0021] Figure 2 It is a schematic diagram of the internal structure of the housing of the monitoring and early warning device of the present invention;

[0022] Figure 3 It is a schematic structural diagram of a cable introduction device of the present invention;

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

[0024] Figure 5 yes Figure 4 A cross-sectional view of

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

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

[0027] Description of Figure Numbers

[0028] 1-explosion-proof cover of cable connector cavity, 2-cable entry device, 3-explosion-proof terminal block, 4-monitoring and early warning cavity display panel, 5-hinge, 6-explosion-proof shell, 7-cable connector cavity, 8-cable connector, 9-partial discharge monitoring sensor, 10-mine explosion-proof and intrinsically safe DC regulated power supply, 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 block, 19-cable connector outlet insulator, 20-cable entry device flange, 21-introduction 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

[0029] 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 rather than to limit the scope of the present invention.

[0030] like Figure 1 and Figure 2 As shown, the present embodiment discloses a flameproof high-voltage cable connection and monitoring and early warning device for mining, comprising 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 is connected to the monitoring and early warning cavity explosion-proof cover 14 by a hinge 5.

[0031] 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.

[0032] A cable connector 8, a partial discharge monitoring sensor 9, a flameproof intermediate terminal 11 and a temperature and humidity monitoring sensor 15 are arranged in the cable connector cavity 7; a cable introduction device 2 is arranged outside.

[0033] 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, and 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.

[0034] 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 change in the cable connector cavity.

[0035] The explosion-proof cover plate 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 early warnings through sound, light and the like.

[0036] A number of explosion-proof terminals 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 terminals 3. By assigning address information to each group of mining explosion-proof high-voltage cables connected to the monitoring and early warning device, the fault location and fault information can be quickly determined.

[0037] 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.

[0038] 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 arranged on the monitoring and control board 13.

[0039] 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 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 carried out in time 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 abnormal fault 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, so as to realize unified early warning management of cable connectors 8 at multiple locations and points.

[0040] The mining flameproof and intrinsically safe DC regulated power supply 10 supplies power to the monitoring and control board 13 .

[0041] The present invention monitors and warns the connection status and faults of the high-voltage cable while realizing the connection of the mining high-voltage cable, including but not limited to the monitoring of temperature, humidity, and partial discharge signals. The cable connector 8 adopts the form of a phase line insulating plug rod, eliminating the need to fill the electrical gap between the socket insulation and the plug insulation, and the electrical gap and creepage distance on the socket insulation and the electrical gap and creepage distance on the plug insulation meet the national standard GB3836.

Claims

1. A flameproof high-voltage cable connection and monitoring and 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), the two cavities are isolated by a middle partition, a cable lead-in 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 arranged 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 arranged in the middle of the cable connector, and a plurality of through holes are arranged on the insulator (26), and phase line plug insulating sleeves are inserted into the through holes; The cable connector cavity (7) is also provided with a temperature and humidity sensor bracket (28) therein, and the temperature and humidity 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 arranged on the monitoring and early warning chamber (13); the acquisition module acquires the partial discharge signal and the temperature and humidity signal acquired by the partial discharge monitoring sensor (9) and the temperature and humidity monitoring sensor (15), performs data processing and analysis, displays the real-time data and fault indicators on the display panel (4) of the monitoring and early warning chamber, and monitors the partial discharge and the temperature and humidity inside the cable connector chamber through a characteristic data fault algorithm. If a signal abnormality 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 abnormal fault information is reflected in time on the display panel (4) of the monitoring and early warning chamber, and the data is simultaneously transmitted to the upper computer through the explosion-proof wiring terminal (3) outside the monitoring and early warning chamber, and the current fault location information is reflected to the management personnel and the centralized control center, so as to timely check and repair, and realize the unified early warning management of cable connectors (8) at multiple locations and multiple points.

2. The flameproof high-voltage cable connection and monitoring and early warning device for mining as claimed in 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 are inserted into the mounting holes of the cable entry device pressure plate (22) through the cable entry device housing (21), and are tightened with tightening bolts (24) to ensure reliable cable connection; the cable terminal (18) is fixed at the ends of each phase line of the cable, and is inserted into the main core wire hole of the cable on the insulator (19) of the cable connector outlet, and is connected and fixed by pressure plate bolts (23).

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

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

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