A monitoring device for sensing the loose state of bolt pins in power transmission lines

Abstract

The present invention relates to a monitoring device for sensing the loose state of a bolt pin of a power transmission line. The monitoring device is connected to a pin installed on the bolt. The monitoring device comprises a housing and a switch module, a communication module, an antenna module, a power module and an MCU module installed in the housing. The switch module, the communication module, the antenna module and the power module are respectively connected to the MCU module. The switch module is provided with a switch circuit and a knife switch connected to the switch circuit. The knife switch changes the switch circuit state when the pin falls off, thereby realizing real-time monitoring of the loose state of the pin. Compared with the prior art, the present invention has the advantages of realizing real-time monitoring of the loose state of the pin, low missed detection rate, simple structure, low cost, etc.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission line monitoring, and in particular to a monitoring device for sensing the loose state of bolt pins of a power transmission line. Background Art

[0002] Transmission lines and towers are key parts of the safe and stable operation of the power grid and are important indicators of the reliability of the power grid. They are exposed to the wild or sparsely populated areas for a long time and are easily affected by weather such as strong winds, ice and snow, heavy rain, lightning strikes, etc. Under the influence of stress such as severe swings, it is easy to cause key components such as hardware, bolts, pins, insulators, etc. that connect the lines and towers to become loose or damaged. If hidden dangers are not checked and repaired in time, it will have serious consequences for the safety of the transmission lines. Bolts are the most important parts that connect various components. Their tightening state directly affects the health of each connector. Pins can effectively prevent nuts from falling off, and play a very important role in protecting the safety and stability between connectors. If the pins fall off, it indicates that the bolts are loose and there are safety hazards, which provides an important basis for judging the status of the transmission line.

[0003] Since the pins are small in size and are mostly in the blind spot, the traditional regular manual inspection method can detect some hidden dangers, but it consumes a lot of manpower and material resources, and there are missed inspections, and hidden dangers cannot be discovered in time during the inspection vacuum period. In recent years, with the development of drone technology, the use of drone photography to detect pin-level defects has been applied in power inspections, but this method has the following disadvantages: First, the detection rate cannot be guaranteed. Due to problems such as the drone shooting angle and the background of the video / photo, the pin-level defects may not be photographed or identified, resulting in missed inspections; second, the timeliness of detection. If the pin-level defects occur in the gap between inspections, then this defect will be a major hidden danger when encountering bad weather. Similarly, there are also monitoring equipment for real-time monitoring of transmission lines, but a large number of monitoring images require manual judgment, which restricts its development. With the development of image recognition technology in recent years, intelligent recognition algorithms have been applied to image recognition in monitoring systems, and have achieved certain results, reducing the demand for people and improving the quality of detection, but this method has the same blind spot problem as drone photography, and the monitoring is not comprehensive.

[0004] Therefore, how to monitor the status of the bolt pins of power transmission lines in real time is very important, but there is no good monitoring product in this regard. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and to provide a monitoring device for sensing the loose state of bolt pins on power transmission lines, which can realize real-time monitoring of the loose state of the pins and has a low missed detection rate.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A monitoring device for sensing the loose state of a bolt pin of a power transmission line, the monitoring device being connected to the pin installed on the bolt, the monitoring device comprising a shell and a switch module, a communication module, an antenna module, a power module and an MCU module installed in the shell; the switch module, the communication module, the antenna module and the power module are respectively connected to the MCU module; the switch module is provided with a switch circuit and a knife switch connected to the switch circuit; the knife switch changes the switch circuit state when the pin falls off, thereby realizing real-time monitoring of the loose state of the pin.

[0008] Preferably, the switch module also includes a first metal sheet, a second metal sheet, a knife switch shaft and a fixed shaft; the first metal sheet and the second metal sheet are respectively connected to the switch circuit through cables; the knife switch is connected to the knife switch shaft; the knife switch shaft is rotatably connected to the fixed shaft; the fixed shaft is installed on the housing; the knife switch is connected to the switch circuit through a cable.

[0009] More preferably, the knife switch is welded to the knife switch shaft.

[0010] More preferably, the switch module is provided with a reset spring and a spring fixing column; the spring fixing column is connected to the housing; one end of the reset spring is connected to the spring fixing column, and the other end is connected to the knife switch.

[0011] More preferably, the spring fixing column is provided with a through hole; one end of the reset spring is wound around the spring fixing column through the through hole; and the other end of the reset spring is welded to the knife switch.

[0012] Preferably, the monitoring device is connected to the pin through a connecting piece; the connecting piece includes a first connecting piece and a second connecting piece; the first connecting piece and the second connecting piece are respectively connected to the outer shell through screws; the first connecting piece and the second connecting piece are respectively provided with a first through hole and a second through hole for the pin to pass through; the first connecting piece and the second connecting piece are also respectively provided with a first thread and a second thread.

[0013] Preferably, the communication module is a NB-IoT communication chip.

[0014] Preferably, the MCU module is a single chip microcomputer.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. Real-time monitoring of the loose state of pins: Compared with the drone inspection method in the prior art, the monitoring device in the present invention is directly connected to the monitored pins, which can realize real-time monitoring of the loose state of the pins and can more effectively avoid accidents caused by the pins falling off.

[0017] 2. Low missed detection rate: The monitoring device in the present invention is directly connected to the bolt pins that need to be detected. Compared with the image analysis and recognition method in the prior art, the missed detection rate of the monitoring device in the present invention is lower.

[0018] 3. Simple structure and low cost: The monitoring device in the present invention has a simple structure and is easy to implement, and the cost of each component is relatively low, so the manufacturing cost of the device is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of the monitoring device in the present invention;

[0020] Figure 2 is a top view of the monitoring device of the present invention;

[0021] Figure 3 It is a front view of the first connecting member in the present invention;

[0022] Figure 4 is a side view of the first connecting member in the present invention;

[0023] Figure 5 is a front view of the second connecting member in the present invention;

[0024] Figure 6 is a side view of the second connecting member in the present invention;

[0025] Figure 7 It is a schematic diagram of the monitoring device of the present invention when it is installed on a pin.

[0026] The numbers in the figure show:

[0027] 1. Housing, 2. Switch module, 3. Communication module, 4. Antenna module, 5. Power module, 6. MCU module, 7. Connector, 201. Switch circuit, 202. Knife switch, 203. First metal sheet, 204. Second metal sheet, 205. Knife switch shaft, 206. Fixed shaft, 207. Reset spring, 208. Spring fixing column, 701. First connecting member, 702. Second connecting member, 7011. First through hole, 7012. First thread, 7021. Second through hole, 7022. Second thread. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0029] A monitoring device for sensing the loose state of bolt pins in a power transmission line, the structural schematic diagram of the device is shown in FIG. Figure 1 and Figure 2 As shown, the monitoring device includes a housing 1, a switch module 2 installed in the housing 1, a communication module 3, an antenna module 4, a power module 5 and an MCU module 6, and the switch module 2, the communication module 3, the antenna module 4 and the power module 5 are respectively connected to the MCU module 6.

[0030] The switch module 2 comprises a switch circuit 201, a knife switch 202, a first metal sheet 203, a second metal sheet 204, a knife switch rotating shaft 205 and a fixed shaft 206. The first metal sheet 203 and the second metal sheet 204 are respectively connected to the switch circuit (201) through cables, and the knife switch 202 is also connected to the switch circuit 201 through cables. The first metal sheet 203 and the second metal sheet 204 are respectively connected to the switch circuit 201 through cables, the knife switch 202 is welded to the knife switch rotating shaft 205, the knife switch rotating shaft 205 is rotatably connected to the fixed shaft 206, and the fixed shaft 205 is installed on the housing 1. The housing 1 is also provided with a knife switch activity hole for the knife switch 202 to move.

[0031] The switch module 2 is also provided with a reset spring 207 and a spring fixing column 208 for resetting the knife switch 202. The spring fixing column 208 is connected to the housing 1. The spring fixing column 208 is provided with a through hole. One end of the reset spring 207 is wound around the spring fixing column 208 through the through hole, and the other end is welded to the knife switch 202.

[0032] The connecting device in this embodiment is connected to the pin through the connecting member 7, and the connecting member 7 includes a first connecting member 701 and a second connecting member 702, and the two connecting members are connected to the housing 1 through screws. Figure 3 and Figure 4 As shown, the structure of the second connecting member 702 is as follows Figure 5 and Figure 6 As shown, the first connecting member 701 is provided with a first through hole 7011 and a first thread 7012, and the second connecting member 702 is provided with a second through hole 7021 and a second thread 7022, and both the first through hole 7011 and the second through hole 7021 are used for the pin to pass through. In this embodiment, the installation position of the connecting member 7 on the housing 1 and the length of the connecting member 7 can be adjusted according to the length of the pin, and can adapt to the status monitoring of pins of different sizes.

[0033] The communication module 3 in this embodiment is a NB-IoT communication chip, model BC26; the MCU module 6 is a single-chip microcomputer, model STM32L151C8T6; the power module 5 uses a lithium-ion battery; and the antenna module 4 is an SMA elbow rubber stick antenna.

[0034] The schematic diagram of the monitoring device in this embodiment when it is installed on the pin is as follows Figure 7 As shown, the contact of the knife switch 202 is connected to the first metal sheet 203 in the initial state. At this time, the first metal sheet 203, the switch circuit 201 and the knife switch 202 form a loop, and the state of the switch circuit 201 corresponds to the normal state of the bolt pin. When the pin falls off, the head of the bolt will drive the knife switch 202 to rotate, so that the knife switch contact is connected to the second metal sheet 204. At this time, the second metal sheet 204, the switch circuit 201 and the knife switch 202 form a loop, and the state of the switch circuit 201 corresponds to the loose state of the bolt pin. At this time, the monitoring device sends the pin status data to the monitoring center through the NB-IoT communication chip and issues an alarm.

[0035] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A monitoring device for sensing the loose state of bolt pins on a power transmission line, the monitoring device being connected to the pins mounted on the bolts, characterized in that: The monitoring device comprises a housing (1) and a switch module (2), a communication module (3), an antenna module (4), a power module (5) and an MCU module (6) installed in the housing (1); the switch module (2), the communication module (3), the antenna module (4) and the power module (5) are respectively connected to the MCU module (6); the switch module (2) is provided with a switch circuit (201) and a knife switch (202) connected to the switch circuit (201); the knife switch (202) changes the state of the switch circuit when a pin falls off, thereby realizing real-time monitoring of the loose state of the pin; The switch module (2) further comprises a first metal sheet (203), a second metal sheet (204), a knife switch rotating shaft (205) and a fixed shaft (206); the first metal sheet (203) and the second metal sheet (204) are respectively connected to the switch circuit (201) via cables; the knife switch (202) is connected to the knife switch rotating shaft (205); the knife switch rotating shaft (205) is rotatably connected to the fixed shaft (206); the fixed shaft (205) is mounted on the housing (1); the knife switch (202) is connected to the switch circuit (201) via cables; The MCU module (6) is a single chip microcomputer.

2. A monitoring device for sensing the loose state of bolt pins in a power transmission line according to claim 1, characterized in that: The knife switch (202) is welded to the knife switch rotating shaft (205).

3. A monitoring device for sensing the loose state of bolt pins in a power transmission line according to claim 1, characterized in that: The switch module (2) is provided with a reset spring (207) and a spring fixing column (208); the spring fixing column (208) is connected to the housing (1); one end of the reset spring (207) is connected to the spring fixing column (208), and the other end is connected to the knife switch (202).

4. A monitoring device for sensing the loose state of bolt pins in a power transmission line according to claim 3, characterized in that: The spring fixing column (208) is provided with a through hole; one end of the reset spring (207) is wound around the spring fixing column (208) through the through hole; and the other end of the reset spring (207) is welded to the knife switch (202).

5. A monitoring device for sensing the loose state of bolt pins in a power transmission line according to claim 1, characterized in that: The monitoring device is connected to the pin via a connecting piece (7); the connecting piece (7) comprises a first connecting piece (701) and a second connecting piece (702); the first connecting piece (701) and the second connecting piece (702) are respectively connected to the housing (1) via screws; the first connecting piece (701) and the second connecting piece (702) are respectively provided with a first through hole (7011) and a second through hole (7021) for the pin to pass through; the first connecting piece (701) and the second connecting piece (702) are also respectively provided with a first thread (7012) and a second thread (7022).

6. A monitoring device for sensing the loose state of bolt pins in a power transmission line according to claim 1, characterized in that: The communication module (3) is a NB-IoT communication chip.

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