Monitoring device for grounding resistance of railway cable box

Abstract

The utility model belongs to the field of cable grounding resistance monitoring, and particularly relates to a railway cable box grounding resistance monitoring device, which comprises a monitoring acquisition host and a cable box, and the cable box comprises a communication module, a controller, a grounding monitoring module and a test control switch. The monitoring acquisition host is connected with the communication module through the PLC, and the communication module is connected with the controller in a TTL serial port communication mode; the grounding monitoring module is respectively connected with a cable armoring layer wire and a grounding collecting bar in the cable box through a wiring terminal, a test control switch is arranged between the grounding monitoring module and the wiring terminal, and the controller can control the test control switch to be switched on and switched off. And the grounding monitoring module measures the loop resistance formed between the cable armor layer wiring and the grounding collecting bar. According to the utility model, the cable grounding condition can be monitored in real time without opening the box, so that a large amount of manpower and material resources and skylight operation time can be saved.

Description

Technical Field

[0001] The utility model relates to the field of cable grounding resistance monitoring, in particular to a monitoring device for the grounding resistance of a railway cable box. Background Art

[0002] As my country's railway lines are getting longer and longer, the railway network is covering a wider range. At the same time, with the maturity and popularization of various trackside equipment to ensure railway driving safety, the number of signal cables extending from the machine room to the outdoors is increasing, and the interval coverage is getting farther and farther. Therefore, the number of cable junction boxes is becoming larger and larger, and the difficulty and workload of maintenance are also increasing.

[0003] According to the current maintenance regulations for railway electrical operations, the cable boxes need to be opened in spring and autumn every year to inspect and test the grounding busbars inside the boxes to confirm that the boxes are well grounded and the armored shielding layer of the cables is reliably grounded. However, if each box is opened for inspection and maintenance, a large amount of manpower, material resources and skylight operation time will be required every year to complete the grounding health status monitoring of all boxes, which brings huge challenges to the cable maintenance work of the railway electrical department. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a monitoring device for the grounding resistance of a railway cable box, which can monitor the grounding status of the box without opening the railway cable box, and can realize real-time, continuous and convenient monitoring of the railway cable box, thereby solving the problem of the prior art that each railway cable box needs to be opened for inspection and maintenance, which consumes a lot of manpower, material resources and skylight operation time.

[0005] To achieve the above object, the utility model provides the following technical solutions: a monitoring device for the grounding resistance of a railway cable box, comprising a monitoring and acquisition host and a cable box, wherein the cable box comprises a communication module, a controller, a grounding monitoring module, and a test control switch;

[0006] The monitoring and acquisition host is connected to the communication module via PLC, and the communication module is connected to the controller via TTL serial communication;

[0007] The grounding monitoring module is connected to the cable armor layer wiring and the grounding collection bus in the cable box through the wiring terminals respectively. A test control switch is provided between the grounding monitoring module and the wiring terminals. The controller can control the test control switch to close so that the grounding monitoring module measures the loop resistance formed between the cable armor layer wiring and the grounding collection bus.

[0008] Preferably, the cable boxes are provided in plurality and are connected to each other in sequence.

[0009] Preferably, the wiring terminal comprises a first wiring terminal and a second wiring terminal, and the grounding monitoring module is connected to the cable armor layer through the first wiring terminal and is connected to the grounding collection bar through the second wiring terminal;

[0010] The test control switch includes a first circuit switch and a second circuit switch, wherein the first circuit switch is arranged between the first wiring terminal and the grounding monitoring module, and the second circuit switch is arranged between the first wiring terminal and the grounding monitoring module. The controller can control the first circuit switch and the second circuit switch to be closed, so that the grounding monitoring module measures the loop resistance formed between the cable armor layer wiring and the grounding collection bus.

[0011] Preferably, it also includes a station server and a switch, the station server is connected to the switch via TCP / IP protocol, and the switch is connected to the monitoring and collection host.

[0012] Preferably, the monitoring and acquisition host is connected to the communication module via wireless communication.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] By installing a grounding monitoring module in each cable box and connecting the cable armor layer shielding wire in the box and the grounding busbar in the box to the grounding monitoring module through wiring terminals, the loop resistance between the grounding wire and the cable armor can be monitored without opening the box. When the resistance value monitored for 24 consecutive hours shows slight fluctuations or is basically linearly consistent, it can be determined that the cable is well grounded. When the resistance value continuously increases or changes suddenly during continuous monitoring, it is considered that the cable is abnormally grounded or the cable armor is abnormal, thereby enabling real-time monitoring of whether the cable armor is in good condition, whether the grounding condition of the grounding busbar inside the box is good, and other status monitoring.

[0015] Therefore, the device can be used to monitor the grounding resistance and status of the cable box in real time and continuously, so that the grounding health status in the cable box can be mastered without opening the cover, and potential hidden dangers such as poor grounding caused by improper construction and abnormal grounding resistance caused by rust, corrosion and aging of the grounding wire can be discovered in time. The utility model can realize real-time monitoring, timely discovery and early warning, which not only ensures the timeliness and practicality of cable grounding monitoring, but also does not need to be manually opened for testing, greatly reducing the skylight operation time and labor costs, thereby improving the efficiency and management level of electrical maintenance work. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of connecting multiple cable boxes according to the utility model;

[0018] In the figure:

[0019] Monitoring and collection host 1, cable box 2, communication module 3, controller 4, grounding monitoring module 5, cable armor layer wiring 6, grounding collection bar 7, first circuit switch 8, second circuit switch 9, first wiring terminal 10, second wiring terminal 11, signal cable 12, cable core wire 13. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] like Figure 1-2 As shown, the utility model provides a monitoring device for the grounding resistance of a railway cable box, comprising a monitoring and collecting host 1, a cable box 2, and the cable box 2 comprises a communication module 3, a controller 4, a grounding monitoring module 5, and a test control switch;

[0022] The monitoring and acquisition host 1 is connected to the communication module 3 via the PLC, and the communication module 3 is connected to the controller 4 via the TTL serial communication mode;

[0023] The grounding monitoring module 5 is connected to the cable armor layer wiring 6 and the grounding collection bar 7 in the cable box 2 through the wiring terminals respectively. A test control switch is provided between the grounding monitoring module 5 and the wiring terminals. The controller 4 can control the test control switch to be closed, so that the grounding monitoring module 5 measures the loop resistance formed between the cable armor layer wiring and the grounding collection bar 7.

[0024] Specifically, in this embodiment, by installing a grounding monitoring module 5 in each cable box 2, and connecting the cable armor layer shielding wire in the box and the grounding bus 7 in the box to the grounding monitoring module 5 through wiring terminals, the loop resistance between the grounding wire and the cable armor can be monitored without opening the box. When the resistance value monitored for 24 consecutive hours shows slight fluctuations or is basically linearly consistent, it can be determined that the cable is well grounded. When the resistance value continuously monitored increases or changes suddenly, it is considered that the cable is grounded abnormally or the cable armor is abnormal, thereby enabling real-time monitoring of whether the cable armor is in good condition, whether the grounding condition of the grounding bus inside the box is good, and other status monitoring.

[0025] Therefore, the device can be used to monitor the grounding resistance and status of the cable box 2 in real time and continuously, so that the grounding health status in the cable box 2 can be mastered without opening the cover, and potential hidden dangers such as poor grounding caused by improper construction and abnormal grounding resistance caused by rust, corrosion and aging of the grounding wire can be discovered in time. The utility model can realize real-time monitoring, timely discovery and early warning, which not only ensures the timeliness and practicality of cable grounding monitoring, but also does not need to be manually opened for testing, greatly reducing the skylight operation time and labor costs, thereby improving the efficiency and management level of electrical maintenance work.

[0026] In an optional embodiment, a plurality of cable boxes 2 are provided and are sequentially connected to each other.

[0027] Specifically, Figure 2 As shown, there are two connected cable boxes 2, each of which is connected to the grounding wire. By providing a plurality of cable boxes 2 and connecting them to each other in sequence, simultaneous monitoring of a plurality of cable boxes 2 can be achieved.

[0028] In an optional embodiment, the wiring terminal includes a first wiring terminal 10 and a second wiring terminal 11, and the grounding monitoring module 5 is connected to the cable armor layer wiring 6 through the first wiring terminal 10 and is connected to the grounding collection bar 7 through the second wiring terminal 11;

[0029] The test control switch includes a first circuit switch 8 and a second circuit switch 9. The first circuit switch 8 is arranged between the first wiring terminal 10 and the grounding monitoring module 5, and the second circuit switch 9 is arranged between the first wiring terminal 10 and the grounding monitoring module 5. The controller 4 can control the first circuit switch 8 and the second circuit switch 9 to be closed, so that the grounding monitoring module 5 measures the loop resistance formed between the cable armor layer wiring and the grounding collection bar 7.

[0030] Specifically, by setting the first terminal 10, the second terminal 11, the first circuit switch 8, and the second circuit switch 9, the controller 4 can control the first circuit switch 8 and the second circuit switch 9 to close, so that the monitoring module is connected to the cable armor layer wiring 6 and the grounding bus 7 through the first terminal 10 and the second terminal 11 respectively, thereby realizing the grounding monitoring module 5 to measure the loop resistance formed between the cable armor layer wiring and the grounding bus 7.

[0031] In an optional implementation, a monitoring device for the grounding resistance of a railway cable box 2 further includes a station server and a switch, the station server is connected to the switch via a TCP / IP protocol, and the switch is connected to a monitoring and acquisition host 1 .

[0032] Specifically, by setting up a station service station and a switch, and connecting the station server to the switch through the TCP / IP protocol, and connecting the switch to the monitoring and acquisition host 1, it is possible to remotely obtain the monitoring data of the grounding condition of the cable box 2 from the station server.

[0033] In an optional implementation, the monitoring and acquisition host 1 is connected to the communication module 3 via wireless communication.

[0034] Specifically, by using wireless communication to achieve communication connection between the monitoring and acquisition host 1 and the communication module 3, the installation and connection steps of the wired connection method can be saved, which can make the installation and connection work of the device more convenient and simple.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A monitoring device for grounding resistance of railway cable box, characterized in that: It includes a monitoring and acquisition host and a cable box, wherein the cable box includes a communication module, a controller, a grounding monitoring module, and a test control switch; The monitoring and acquisition host is connected to the communication module via PLC, and the communication module is connected to the controller via TTL serial communication; The grounding monitoring module is connected to the cable armor layer wiring and the grounding collection bus in the cable box through the wiring terminals respectively. A test control switch is provided between the grounding monitoring module and the wiring terminals. The controller can control the test control switch to be closed so that the grounding monitoring module measures the loop resistance formed between the cable armor layer wiring and the grounding collection bus.

2. A monitoring device for grounding resistance of a railway cable box according to claim 1, characterized in that: The cable boxes are provided in plurality and are connected to each other in sequence.

3. A monitoring device for grounding resistance of a railway cable box according to claim 1, characterized in that: The wiring terminal comprises a first wiring terminal and a second wiring terminal, and the grounding monitoring module is connected to the cable armor layer through the first wiring terminal and is connected to the grounding collection bar through the second wiring terminal; The test control switch includes a first circuit switch and a second circuit switch, wherein the first circuit switch is arranged between the first wiring terminal and the grounding monitoring module, and the second circuit switch is arranged between the first wiring terminal and the grounding monitoring module. The controller can control the first circuit switch and the second circuit switch to be closed, so that the grounding monitoring module measures the loop resistance formed between the cable armor layer wiring and the grounding collection bus.

4. A monitoring device for grounding resistance of a railway cable box according to claim 1, characterized in that: It also includes a station server and a switch. The station server is connected to the switch via the TCP / IP protocol, and the switch is connected to the monitoring and collection host.

5. A monitoring device for grounding resistance of a railway cable box according to claim 1, characterized in that: The monitoring and acquisition host is connected to the communication module via wireless communication.

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