Binding post temperature on-line monitoring system of explosion-proof junction box

Abstract

The utility model relates to a binding post temperature on-line monitoring system of a flame-proof type junction box, which comprises a control substation and a plurality of flame-proof type junction boxes, and the plurality of flame-proof type junction boxes are respectively connected with the control substation through an RS-485 bus and send collected temperature signals to the control substation. The explosion-proof junction box comprises a junction box lower cavity, a junction box upper cover, a binding post, a non-contact temperature sensor, a data processor and a 485 interface, the binding post is arranged on the bottom surface of the lower cavity of the junction box; the non-contact temperature sensor, the data processor and the 485 interface are fixed on the upper cover of the junction box; the non-contact temperature sensor is connected with the data processor, and a temperature signal processed by the data processor is uploaded through a 485 interface and is connected to a control substation through a mining communication cable.

Description

Technical Field

[0001] This utility model belongs to the field of underground power supply technology in coal mines, and relates to an explosion-proof junction box and online temperature monitoring system for terminals. Background Technology

[0002] In underground coal mine power supply systems, power cables are connected or branched through junction boxes. The cable cores are crimped together by the terminal nuts in the junction box to extend the power supply distance and supply power to branch systems. Loose connections can increase contact resistance, leading to overheating at the joints under load current. If not addressed promptly, this overheating can burn out the cores or cause short circuits, resulting in power outages and safety hazards. Therefore, regular checks of the terminal temperatures are essential. However, these checks require prior power outage procedures. During on-site operations, the upstream power supply must be disconnected first, then the junction box opened to carefully inspect the terminals and core color changes, and the terminal temperature measured. After inspection, the junction box cover is replaced before restoring normal power supply. Due to the large number and wide distribution of explosion-proof junction boxes in underground coal mines, the inspection process is labor-intensive, cumbersome, and inefficient, hindering normal mine production. Utility Model Content

[0003] To solve the above-mentioned technical problems, the purpose of this utility model is to provide an explosion-proof junction box and terminal online temperature monitoring system.

[0004] This utility model provides an explosion-proof junction box, comprising: a lower cavity of the junction box, a top cover of the junction box, terminals, a non-contact temperature sensor, a data processor, and a 485 interface; the terminals are installed on the bottom surface of the lower cavity of the junction box, and the non-contact temperature sensor, the data processor, and the 485 interface are fixed on the top cover of the junction box; the non-contact temperature sensor is connected to the data processor, and the temperature signal processed by the data processor is uploaded through the 485 interface and connected to the control substation via a mining communication cable.

[0005] Furthermore, the junction box cover is provided with a wiring horn, which serves as the outlet for remote communication between the junction box cover and the control substation.

[0006] Furthermore, the junction box cover is fixed to the lower cavity of the junction box by bolts.

[0007] This utility model also provides an online monitoring system for the terminal temperature of an explosion-proof junction box, comprising: a control substation and multiple explosion-proof junction boxes, wherein the explosion-proof junction boxes are any of the above-mentioned explosion-proof junction boxes, and the multiple explosion-proof junction boxes are respectively connected to the control substation via an RS-485 bus to send the collected temperature signals to the control substation.

[0008] Furthermore, the control substation includes: a power supply unit, a display unit, and an alarm unit connected to the control unit and the control terminal; the non-contact temperature sensor and data processor in the explosion-proof junction box are powered by the power supply module of the control substation; the display unit of the control substation displays the temperature values ​​and corresponding position numbers of multiple terminals in the explosion-proof junction box in real time; when the temperature of the terminal exceeds the set threshold, the control unit controls the alarm unit to issue an alarm signal.

[0009] This utility model discloses an explosion-proof junction box and terminal block temperature online monitoring system, which has the following beneficial effects:

[0010] 1. Make full use of the mature cable junction boxes already in use on site. Without making any changes to the lower cavity of the junction box, only a non-contact temperature sensor, data processor and 485 interface need to be installed on the top cover of the junction box to realize the temperature measurement transformation of the junction box and remote temperature transmission. The transformation is not only simple but also saves money. It maximizes the satisfaction of the wiring habits of the operators and realizes centralized temperature measurement management of the terminal blocks of cable junction boxes throughout the mine.

[0011] 2. The online monitoring system of this utility model can realize online monitoring of the terminal block operating temperature. By centrally displaying and alarming the terminal block operating temperature, the location number of the junction box with abnormal temperature can be located, which facilitates troubleshooting.

[0012] 3. The circuit does not need to be powered off during inspection, simplifying the process and improving work efficiency. It also solves the problems of losses caused by power outages affecting normal production, as well as the problems of non-inspection or false inspection. It plugs loopholes in the work from a technical point of view and eliminates safety hazards. Attached Figure Description

[0013] Figure 1 This is a cross-sectional view of an explosion-proof junction box according to this utility model;

[0014] Figure 2 This is a block diagram of the online temperature monitoring system for the terminals of the explosion-proof junction box of this utility model. Detailed Implementation

[0015] like Figure 1 As shown, this utility model discloses an explosion-proof junction box, comprising: a lower junction box cavity 2, a junction box upper cover 3, a terminal block 1, a non-contact temperature sensor 4, a data processor 5, and a 485 interface 6. The terminal block 1 is installed on the bottom surface of the lower junction box cavity 2, and the non-contact temperature sensor 4, data processor 5, and 485 interface 6 are fixed to the upper junction box cover 3. The non-contact temperature sensor 4 is connected to the data processor 5, and the temperature signal processed by the data processor 5 is uploaded via the 485 interface 6 and connected to the control substation via a mining communication cable.

[0016] The junction box cover 3 is provided with a wiring horn 7, which serves as the outlet for remote communication between the junction box cover 3 and the control substation.

[0017] The junction box cover 3 is fixed to the lower cavity 2 of the junction box by bolts.

[0018] like Figure 2 As shown, an online monitoring system for terminal temperature of an explosion-proof junction box includes: a control substation and multiple explosion-proof junction boxes. The explosion-proof junction boxes are the aforementioned type. The multiple explosion-proof junction boxes are connected to the control substation via an RS-485 bus and send the collected temperature signals to the control substation.

[0019] The control substation includes a power supply unit, a display unit, and an alarm unit connected to the control unit and the control terminal. The non-contact temperature sensor and data processor in the explosion-proof junction box are powered by the control substation's power supply module. The control substation's display unit displays the temperature values ​​and corresponding position numbers of multiple terminals within the explosion-proof junction box in real time. When the temperature of a terminal exceeds a set threshold, the control unit controls the alarm unit to issue an alarm signal.

[0020] This invention relates to an online temperature monitoring system for explosion-proof junction boxes and terminals, used in underground coal mine power supply systems. It eliminates the need for individual inspection of each explosion-proof junction box, enabling online monitoring of the operating temperature of the terminals within the junction box. The terminal temperature signal is uploaded in real-time via a 485 interface. The control substation displays the operating temperature of each junction box in real-time. When the operating temperature exceeds the limit, an alarm signal is issued, and the junction box location information is displayed, prompting personnel to take timely and appropriate action to prevent fires or power outages, eliminate safety hazards, ensure the safe operation of the underground power supply system, and promote safe production in coal mines.

[0021] The above description is only a preferred embodiment of the present utility model and is not intended to limit the concept of the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An online monitoring system for the terminal temperature of an explosion-proof junction box, characterized in that, include: Control substation and multiple explosion-proof junction boxes; The explosion-proof junction box includes: a lower cavity, a top cover, terminals, a non-contact temperature sensor, a data processor, and a 485 interface; the terminals are installed on the bottom surface of the lower cavity, and the non-contact temperature sensor, data processor, and 485 interface are fixed on the top cover; the non-contact temperature sensor is connected to the data processor, and the temperature signal processed by the data processor is uploaded via the 485 interface and connected to the control substation via a mining communication cable; The junction box cover is equipped with a wiring horn, which serves as the outlet for remote communication between the junction box cover and the control substation; the junction box cover is fixed to the lower cavity of the junction box by bolts; multiple explosion-proof junction boxes are connected to the control substation via RS-485 bus to send the collected temperature signals to the control substation. The control substation includes: a control unit and a power supply unit, a display unit, and an alarm unit connected to the control unit; the non-contact temperature sensor and data processor in the explosion-proof junction box are powered by the power supply module of the control substation; the display unit of the control substation displays the temperature values ​​and corresponding position numbers of multiple terminals in the explosion-proof junction box in real time; when the temperature of the terminal exceeds the set threshold, the control unit controls the alarm unit to issue an alarm signal.

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