A position monitoring device for grounding wire of substation

Abstract

The present invention discloses a position monitoring device for a substation grounding wire, including a grounding pile, the grounding pile including a base and a fixing plate, the fixing plate is vertically connected to the base and the fixing plate surface is vertically arranged, the fixing plate is provided with a fixing hole near the outer end, the grounding pile is connected to the grounding conductor and the grounding terminal respectively through the base and the fixing hole; a pressure sensor is provided at the fixing hole, the pressure sensor is installed on one side of the fixing plate and a threaded hole is provided in the center to match the fixing hole, the pressure sensor stress surface is located on the outside, the pressure sensor is respectively connected to a power supply and a wireless communication module, and the power supply and the wireless communication module are arranged on the grounding pile. The device has a compact structure, is easy to load and unload, is reliable to use, can effectively collect pressure signals, and through the signal detection, the operating personnel can confirm that the three-phase power line has been reliably grounded when installing the grounding, complete normal operation, and solve the safety risk problems caused by the confusion and forgetfulness of the grounding wire installation.

Description

Technical Field

[0001] The invention belongs to the technical field of electric power engineering, and in particular relates to a position monitoring device for a substation grounding wire. Background Art

[0002] When grounding plant equipment, high-voltage distribution lines, and low-voltage distribution networks, the grounding wire should be a three-phase short-circuit grounding wire. The grounding wire, as the main safety tool of the substation, fully reflects the lifeline of maintenance personnel, but it poses a major safety hazard to operating personnel.

[0003] At present, substations implement intensive management. When operating the equipment status in the station, the dispatcher only operates the equipment in cold standby status. The station has maintenance safety measures and the grounding wires are hung and removed by the operating personnel themselves. Although there are five-protection keys for grounding piles, the work of installing grounding wires is still relatively chaotic. The power safety work regulations stipulate that records should be kept when installing and removing grounding wires, but the current grounding wire management has not achieved effective control, which makes it easy for grounding to be missed during the removal process.

[0004] At present, the grounding wire piles of substations are basically complete, which requires us to be able to effectively and real-time monitor the number of grounding wires in the entire station and the specific interval positions of the grounding wire installation during the grounding wire management process to avoid missing grounding wires. Summary of the invention

[0005] Based on the above problems, the present invention provides a grounding pile sensor device to solve the safety risk problems caused by chaotic installation and forgetfulness of grounding wires.

[0006] The technical solution adopted by the present invention is a position monitoring device for a substation grounding wire, including a grounding pile, the grounding pile including a base and a fixing plate, the fixing plate is vertically connected to the base and the fixing plate surface is vertically arranged, the fixing plate is provided with a fixing hole near the outer end, the grounding pile is connected to the grounding conductor and the grounding terminal respectively through the base and the fixing hole; a pressure sensor is provided at the fixing hole, the pressure sensor is respectively connected to a power supply and a wireless communication module, and the power supply and the wireless communication module are arranged on the grounding pile.

[0007] Preferably, the pressure sensor is mounted on one side of the fixing plate and a threaded hole is provided in the center to match the fixing hole, and the force-bearing surface of the pressure sensor is located on the outside.

[0008] Preferably, the grounding terminal is cylindrical, with a ground wire connection portion at the front end and a connecting screw at the tail end. The connecting screw is adapted to the fixing hole and is matched with a fastening nut. A circular plate is provided at the head end of the connecting screw, the area of ​​the circular plate is larger than the area of ​​the fixing hole, and a small hole is opened at the tail end of the connecting screw.

[0009] Preferably, the ground wire connection portion is radially provided with a threaded hole penetrating through the ground terminal, the threaded hole is matched with a bolt, and the ground wire connection portion is provided with a connection plane on one side of the threaded hole opening.

[0010] Preferably, a dovetail is relatively provided on the outer side of the fastening nut, and a gasket is provided at the front end of the fastening nut, and the area of ​​the gasket is larger than the area of ​​the fixing hole.

[0011] Preferably, the ground wire connection portion is connected to the head end of the ground wire by bolts, and a short-circuit bus clamp is provided at the tail end of the ground wire, and the short-circuit bus clamp is connected to the three-phase conductors A, B, and C respectively.

[0012] Preferably, the pressure sensor is connected to a charge amplifier, and the charge amplifier sends a signal to a computer system via a wireless communication module.

[0013] Preferably, the grounding pile is outer-mounted with a shell, mounting holes are respectively provided at the corresponding fixing holes on both sides of the shell, the diameter of the mounting holes is larger than the outer diameter of the grounding terminal, and the mounting holes are matched with rubber plugs.

[0014] The beneficial effects of the present invention are:

[0015] 1) Use the grounding pile integrated pressure sensor to collect pressure signals. Through the signal detection, the operating personnel can confirm that the three-phase power line has been reliably grounded and normal operation has been completed when installing the grounding wire. This effectively solves the safety accidents caused by the confusion and forgetfulness of the substation operators when operating the grounding wire. The device is mainly used in all electrical equipments with grounding piles installed in substations. It can be operated safely without power outages in each substation, without affecting the operation of equipment, and is easy to manage;

[0016] 2) The present invention provides a circular plate at the front end of the connecting bolt to ensure that the circular plate is effectively connected to the force-bearing surface of the pressure sensor during connection, and fully applies pressure to the pressure sensor when the fastening nut is tightened to ensure signal collection; in addition, a gasket is provided at the front end of the fastening nut, so that no matter which end of the grounding terminal is connected to the pressure sensor, pressure can be generated thereon, thereby ensuring effective signal collection and convenient use;

[0017] 3) By setting the connecting screw and the fastening nut, it is not only ensured that the grounding terminal clamps and squeezes the pressure sensor from both sides, but also ensures that it is tightly connected to the grounding pile, ensuring that the grounding wire power is transmitted to the earth through the grounding pile, protecting people during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the grounding terminal structure;

[0020] Markings in the figure: 1. Grounding pile, 11. Base, 12. Fixing plate, 2. Grounding conductor, 3. Grounding terminal, 31. Ground wire connection part, 311. Connection plane, 32. Connecting screw, 321. Round plate, 322. Small hole, 33. Fastening nut, 331. Dovetail, 332. Gasket, 4. Pressure sensor, 5. Power supply, 6. Wireless communication module, 7. Charge amplifier. DETAILED DESCRIPTION

[0021] The present invention will be further explained below in conjunction with the accompanying drawings to facilitate better understanding by those skilled in the art.

[0022] Example 1

[0023] like Figure 1 As shown, a position monitoring device for a substation grounding line includes a grounding pile 1, a grounding conductor 2, a grounding terminal 3, a pressure sensor 4, a power supply 5, a charge amplifier 7 and a wireless communication module 6.

[0024] The grounding pile 1 includes a base 11 and a fixing plate 12, wherein the fixing plate 12 is vertically connected to the base 11 and the fixing plate 12 is vertically arranged, and a fixing hole is provided near the outer end of the fixing plate 12; the grounding pile 1 is welded to the grounding conductor 2 through the back of the base 11, and the grounding pile 1 is detachably fixedly connected to the grounding terminal 3 through the fixing hole, and the grounding terminal 3 is connected to the grounding wire.

[0025] The pressure sensor 4 is arranged at the fixing hole. Specifically, the pressure sensor 4 is installed on one side of the fixing plate 12 and a threaded hole is provided in the center to match the fixing hole. The force-bearing surface of the pressure sensor 4 is located on the outside. The pressure sensor 4 is respectively connected to the power supply 5 and the charge amplifier 7. The charge amplifier 7 amplifies and converts the electrical signal. The charge amplifier 7 sends the signal to the computer system through the wireless communication module 6. The power supply 5, the charge amplifier 7 and the wireless communication module 6 are arranged on the grounding pile 1. The wireless communication module 6 adopts ZigBee transmission. After collecting the position of the on-site grounding pile through the ZigBee module, the point position is transmitted to the computer system of the main control room, and finally connected with the measurement and control device, so as to directly monitor the grounding condition of each grounding pile 1.

[0026] The grounding terminal 3 is cylindrical, and a grounding wire connecting portion 31 is provided at the front end of the grounding terminal 3. A threaded hole is radially opened in the grounding terminal 3, and a bolt is matched with the threaded hole. A connecting plane 311 is provided on one side of the threaded hole opening of the grounding wire connecting portion 31. The grounding wire connecting portion 31 is connected to the head end of the grounding wire through the bolt. The connecting plane 311 not only ensures the tightness of the bolt connection, but also increases the connection area between the grounding wire and the grounding terminal 3, thereby ensuring a reliable grounding connection. A short-circuit bus clamp is provided at the tail end of the grounding wire, and the short-circuit bus clamp is respectively connected to the three-phase conductors A, B, and C.

[0027] The tail end of the grounding terminal 3 is provided with a connecting screw 32, which is adapted to the fixing hole and matched with a fastening nut 33. The head end of the connecting screw 32 is provided with a circular plate 321, the area of ​​the circular plate 321 is larger than the area of ​​the fixing hole, and a small hole 322 is provided at the tail end of the connecting screw 32 for hanging a five-protection grounding lock. When the ground wire connection part 31 is located on one side of the force-bearing surface of the pressure sensor 4, the circular plate 321 contacts the force-bearing surface of the pressure sensor 4, playing a role of limiting extrusion. As the fastening nut 33 is tightened, the circular plate 321 and the pressure sensor 4 apply pressure to obtain a signal.

[0028] A dovetail 331 is relatively provided on the outer side of the fastening nut 33, which is easy to operate and is convenient for people to manually turn and tighten the fastening nut 33; and a gasket 332 is provided at the front end of the fastening nut 33, and the area of ​​the gasket 332 is larger than the area of ​​the fixing hole. The gasket 332 increases the contact area with the grounding pile 1 and clamps and squeezes it; when the fastening nut 33 is located on one side of the force-bearing surface of the pressure sensor 4, it is connected to the pressure sensor 4 through the gasket 332 and pressure is applied to it, ensuring that the signal can be collected in any way of use, ensuring the reliable use of the device.

[0029] The grounding pile 1 is provided with a shell, and mounting holes are respectively provided on both sides of the shell corresponding to the fixing holes, the diameter of the mounting holes is larger than the outer diameter of the grounding terminal 3, and the mounting holes are matched with rubber plugs. The shell is used to protect the pressure sensor 4, the power supply 5, the charge amplifier 7 and the wireless communication module 6 to avoid rain erosion, and the mounting holes are provided to facilitate installation and connection when the device is used, and the rubber plug is easy to use and has good sealing performance.

[0030] Directions:

[0031] When in use, first connect the ground wire to the ground wire connecting part 31, then open the rubber plug of the shell, and insert the connecting screw 33 through the fixing hole through the fixing plate 12 until the pressure sensor 4 or the fixing plate 12 contacts the circular plate 321, tighten the fastening nut 33 to make it contact and connect with the fixing plate 12 or the pressure sensor 4, so that the pressure sensor 4 is subjected to force, and then connect the five-protection grounding point to the connecting bolt 32 through the small hole 322, start the power supply 5, and the signal of the pressure sensor 4 is wirelessly transmitted to the computer system, and the staff can know the grounding position and grounding condition through the signal data.

[0032] The device has a compact structure, is easy to load and unload, is reliable to use, and can effectively collect pressure signals. Through the signal detection, the operating personnel can confirm that the three-phase power line has been reliably grounded during grounding installation and complete normal operation, thus solving the safety risk problems caused by confusion in the installation of the grounding wire and forgetting.

[0033] The above description is only a specific implementation mode 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 changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A position monitoring device for a substation grounding wire, characterized in that: The grounding pile (1) comprises a base (11) and a fixing plate (12), the fixing plate (12) being vertically connected to the base (11) and the fixing plate (12) having a plate surface arranged vertically, the fixing plate (12) being provided with a fixing hole near the outer end, the grounding pile (1) being connected to a grounding conductor (2) and a grounding terminal (3) respectively through the base (11) and the fixing hole (12); a pressure sensor (4) being provided at the fixing hole, the pressure sensor (4) being connected to a power supply (5) and a wireless communication module (6) respectively, the power supply (5) and the wireless communication module (6) being arranged on the grounding pile (1); The pressure sensor (4) is mounted on one side of the fixing plate (12) and a threaded hole is provided in the center to match the fixing hole, and the force-bearing surface of the pressure sensor (4) is located on the outside; The grounding terminal (3) is cylindrical, with a grounding wire connection portion (31) provided at the front end of the grounding terminal (3), and a connecting screw (32) provided at the rear end. The connecting screw (32) is adapted to the fixing hole and matched with a fastening nut (33). A circular plate (321) is provided at the head end of the connecting screw (32), and the area of ​​the circular plate (321) is larger than the area of ​​the fixing hole. A small hole (322) is provided at the rear end of the connecting screw (32); The ground wire connection portion (31) penetrates the ground terminal and is radially provided with a threaded hole, the threaded hole is matched with a bolt, and the ground wire connection portion (31) is provided with a connection plane (311) on one side of the threaded hole opening.

2. A position monitoring device for a substation grounding wire according to claim 1, characterized in that: A dovetail (331) is arranged on the outer side of the fastening nut (33), and a gasket (332) is arranged at the front end of the fastening nut (331); the area of ​​the gasket (332) is larger than the area of ​​the fixing hole.

3. A position monitoring device for a substation grounding wire according to claim 1, characterized in that: The ground wire connection portion (31) is connected to the head end of the ground wire by means of bolts, and a short-circuit bus clamp is provided at the tail end of the ground wire, and the short-circuit bus clamp is respectively connected to the three-phase conductors A, B, and C.

4. A position monitoring device for a substation grounding wire according to claim 1, characterized in that: The pressure sensor (4) is connected to a charge amplifier (7), and the charge amplifier (7) sends a signal to a computer system via a wireless communication module (6).

5. The position monitoring device for a substation grounding wire according to claim 1, characterized in that: The grounding pile (1) is provided with a shell on its outer cover, and mounting holes are respectively provided at the two sides of the shell corresponding to the fixing holes, the diameter of the mounting holes is larger than the outer diameter of the grounding terminal (3), and the mounting holes are matched with rubber plugs.

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