Load device for arc grounding simulation

Abstract

The utility model relates to the technical field of grounding, in particular to a load device for arc grounding simulation. The load device comprises a load device body and an electricity testing assembly. The electricity testing assembly comprises a detection sub-assembly and a control sub-assembly. The detection sub-assembly comprises an insulating frame body, an insulating pad, a metal rod and a pair of metal foils; the control sub-assembly comprises a mounting seat which is located between the metal rod and the load device body and is fixedly arranged at the top of the insulating frame body, and an insulating rotating rod which is longitudinally arranged in the mounting seat in a penetrating manner and is rotatably connected with the mounting seat. One end of the insulating grip is fixed with the insulating rotating rod, and the other end of the insulating grip penetrates through the corresponding side wall of the mounting seat and extends to the outside. The device can detect whether the outside of the load device is electrified or not, on one hand, the influence of electrified load equipment on the accuracy of experimental data can be avoided, and on the other hand, the safety performance during use can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of grounding, in particular to a load device for arc grounding simulation. Background Art

[0002] Since short-circuit faults and other accidents may occur during the transmission of high-voltage electric energy, resulting in the burning of the line and causing certain harm to the safe and stable operation of the power grid. In summary, how to effectively detect and prevent the occurrence of various circuit short-circuit accidents has become the research focus of power system workers and related scholars.

[0003] In a high-voltage non-neutral grounded system, the probability of single-phase arc grounding faults is very high, and there are serious overvoltage problems. For a distribution system, it is one of the main threats to its power supply reliability. Single-phase arc grounding is when the voltage of a certain phase is short-circuited to the ground through an arc. Most faults occur when a metal or other conductor approaches a high-voltage line, and the distance between the two reaches the distance required for discharge. Since the power grid is three-phase, when a certain phase has a potential of zero due to arc grounding, the voltage to the ground of the remaining two phases will rise from the line voltage to the phase voltage, thus generating overvoltage.

[0004] Regarding the detection of single-phase arc grounding faults, power workers have also conducted a lot of research. Due to the highly non-linear and time-varying characteristics of the arc, when an arc grounding occurs in the power grid, a large number of harmonics will be generated at the fault point, causing distortion of the zero-sequence current and zero-sequence voltage, and serious overvoltage will occur in the non-fault phases, damaging the equipment insulation and having an adverse impact on the safe and stable operation of the system. Therefore, it is necessary to simulate the actual situation through arc grounding simulation for researching arc suppression technical measures.

[0005] Since arc grounding may cause damage to the insulation of equipment during the experiment, it may cause damage to cables and the like in the arc grounding simulation load device, and may cause leakage of the load device. If a leaking load device is used, on the one hand, it may affect the accuracy of the simulated data for arc grounding, and on the other hand, experimenters may operate on the load device during the experiment. If they come into contact with the leaking load device, it may pose a threat to personal safety. Summary of the Utility Model

[0006] In order to solve the above problems, the purpose of the utility model is to provide a load device for arc grounding simulation, which can detect whether the outside of the load device is charged. On the one hand, it can avoid the influence on the accuracy of experimental data caused by the charged load device, and on the other hand, it can also improve the safety performance during use.

[0007] To achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A load device for arc grounding simulation, comprising a load device body and a live-line checking component arranged on one side of the load device body; the live-line checking component includes a detection sub-component fixedly arranged on one side of the load device body and a control sub-component for controlling the connection or disconnection between the detection sub-component and the load device body; the detection sub-component includes an insulating frame fixedly arranged on the side wall of the load device body, an insulating pad embedded through the top plate of the insulating frame, a metal rod vertically inserted into the insulating pad, and a pair of metal foil pieces symmetrically and rotatably arranged at the bottom of the metal rod; the control sub-component includes a mounting seat located between the metal rod and the load device body and fixedly arranged on the top of the insulating frame, an insulating rotating rod longitudinally inserted into the mounting seat and rotatably connected to the mounting seat, a conductive rod vertically inserted into the insulating rotating rod, and an insulating grip with one end fixed to the insulating rotating rod and the other end passing through the corresponding side wall of the mounting seat and extending to the outside; when the conductive rod rotates to the horizontal position, both ends of the conductive rod are in contact with the metal rod and the side wall of the load device body respectively.

[0009] Preferably, an indicating rod is fixedly arranged on the outer side of one end of the insulating grip located inside the mounting seat, a ring groove allowing the indicating rod to rotate circumferentially along the groove wall is formed at the corresponding position inside the mounting seat, elastic indicating pieces are symmetrically and fixedly arranged on both sides of the outer side wall of the ring groove in the horizontal direction, and a groove adapted to the elastic indicating pieces is formed at the end of the indicating rod.

[0010] Preferably, both ends of the conductive rod are semi-circular.

[0011] Preferably, a protective box fixedly connected to the side wall of the load device body is covered outside the live-line checking component, and a protective door is hinged on one side of the protective box.

[0012] Preferably, the top plate of the protective box is inclined downward from the inside to the outside.

[0013] The utility model has the following beneficial effects:

[0014] Before operating inside the load device body, rotate the insulating grip of the utility model to make the insulating rotating rod drive the conductive rod to rotate to the horizontal position, so that the load device body is connected to the metal rod. When the load device body is charged, according to the principle of like charges repelling each other, the two metal foil pieces will rotate away from each other. At this time, the load device body needs to be repaired first. On the one hand, it avoids the influence of the charged load device body on the arc grounding experiment simulation data, and on the other hand, it also reduces the possibility of contacting the charged load device body during use, thereby improving the safety performance when using the load device body. Description of the Drawings

[0015] Figure 1 It is a schematic side sectional view of the load device;

[0016] Figure 2Front schematic view of the power verification component (when the load device is de-energized or the control sub-component is not connected);

[0017] Figure 3 Front schematic view of the power verification component (when the control sub-component is connected and the load device is energized);

[0018] Figure 4 Side sectional schematic view of the power verification component (when the control sub-component is not connected);

[0019] Figure 5 Side sectional schematic view of the power verification component (when the control sub-component is connected);

[0020] Figure 6 Front sectional schematic view of the power verification component (when the control sub-component is connected);

[0021] Figure 7 Schematic view of the rotation of the mounting base and the insulating grip.

[0022] Explanation of the reference numerals:

[0023] 1. Load device body; 2. Power verification component; 21. Detection sub-component; 211. Insulating frame; 212. Insulating pad; 213. Metal rod; 214. Metal foil; 22. Control sub-component; 221. Mounting base; 2211. Ring groove; 2212. Elastic indicator; 222. Insulating rotating rod; 223. Conductive rod; 224. Insulating grip; 2241. Indicator rod; 2242. Groove; 3. Protection box; 4. Protection door. Detailed implementation manners

[0024] The following further elaborates on the present utility model in detail with reference to the accompanying drawings and specific embodiments

[0025] A load device for arc grounding simulation, comprising a load device body 1 and a live-line checking component 2 provided on one side of the load device body 1; the live-line checking component 2 includes a detection sub-component 21 fixedly provided on one side of the load device body 1 and a control sub-component 22 for controlling the connection or disconnection between the detection sub-component 21 and the load device body 1; the detection sub-component 21 includes an insulating frame body 211 fixedly provided on the side wall of the load device body 1, an insulating pad 212 penetrating and embedded on the top plate of the insulating frame body 211, a metal rod 213 vertically penetrating through the insulating pad 212, and a pair of symmetrically rotatably arranged metal foil pieces 214 at the bottom of the metal rod 213; the control sub-component 22 includes a mounting seat 221 located between the metal rod 213 and the load device body 1 and fixedly provided on the top of the insulating frame body 211, an insulating rotating rod 222 longitudinally penetrating through the mounting seat 221 and rotatably connected to the mounting seat 221, a conductive rod 223 vertically penetrating through the insulating rotating rod 222, and an insulating grip 224 with one end fixed to the insulating rotating rod 222 and the other end passing through the corresponding side wall of the mounting seat 221 and extending to the outside; when the conductive rod 223 rotates to the horizontal position, the two ends of the conductive rod 223 are respectively in contact with the metal rod 213 and the side wall of the load device body 1.

[0026] Before operating inside the load device body 1, first rotate the insulating grip 224 so that the insulating rotating rod 222 drives the conductive rod 223 to rotate to the horizontal position, making the load device body 1 communicate with the metal rod 213. When the load device body 1 is charged, according to the principle of like charges repelling each other, the two metal foil pieces 214 will rotate away from each other. At this time, it is necessary to first repair the load device body 1. On the one hand, it can avoid the influence of the charged load device body 1 on the arc grounding experiment simulation data, and on the other hand, it can also reduce the possibility of contacting the charged load device body 1 during use, thereby improving the safety performance when using the load device body 1.

[0027] As a possible implementation of this solution, preferably, an indicating rod 2241 is fixed on the outer side of one end of the insulating grip 224 located inside the mounting seat 221. A ring groove 2211 allowing the indicating rod 2241 to rotate circumferentially along the groove wall is provided at the corresponding position inside the mounting seat 221. Elastic indicating members 2212 are symmetrically fixed on both sides of the outer side wall of the ring groove 2211 in the horizontal direction. A groove 2242 adapted to the elastic indicating members 2212 is provided at the end of the indicating rod 2241; through the cooperation of the elastic indicating members 2212, the groove 2242 and the indicating rod 2241, on the one hand, when the conductive rod 223 rotates to the horizontal position (that is, when the two ends of the conductive rod 223 are respectively in contact with the metal rod 213 and the side wall of the load device body 1), it gives a prompt to the operator to improve the live-line checking efficiency, and on the other hand, it limits the position when the conductive rod 223 rotates to the horizontal position for observing the two metal foil pieces 214.

[0028] As a possible implementation manner of this solution, preferably, both ends of the conductive rod 223 are semi-circular; by setting both ends of the conductive rod 223 to be semi-circular, damage to the metal rod 213 and the side wall of the load device body 1 during the rotation of the conductive rod 223 can be reduced, and the service life of the device can be extended.

[0029] As a possible implementation manner of this solution, preferably, a protective box 3 fixedly connected to the side wall of the load device body 1 is externally covered on the power inspection component 2, and a protective door 4 is hinged on one side of the protective box 3; through the arrangement of the protective box 3 and the protective door 4, it is possible to prevent rainwater and the like from entering the power inspection component 2, resulting in a decrease in the insulation performance of the insulating frame 211, the insulating pad 212, the insulating rotating rod 222, and the insulating grip 224, so as to improve the safety of personnel during the power inspection process.

[0030] As a possible implementation manner of this solution, preferably, the upper roof of the protective box 3 is inclined downward from the inside to the outside; to prevent rainwater from accumulating on the top of the protective box 3.

[0031] The above are only the specific implementation manners of the present utility model, and do not limit the patent scope of the present utility model. Any equivalent structural transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A load device for arc grounding simulation, characterized in that: It comprises a load device body (1) and an electrical testing component (2) arranged on one side of the load device body (1); The electrical testing component (2) comprises a detection subcomponent (21) fixedly arranged on one side of the load device body (1) and a control subcomponent (22) used for controlling whether the detection subcomponent (21) is connected to the load device body (1); The detection subassembly (21) comprises an insulating frame (211) fixedly mounted on the side wall of the load device body (1), an insulating pad (212) penetrating and embedded in the top plate of the insulating frame (211), a metal rod (213) vertically inserted into the insulating pad (212), and a pair of metal foils (214) symmetrically rotated and arranged at the bottom of the metal rod (213); The control subassembly (22) comprises a mounting seat (221) located between the metal rod (213) and the load device body (1) and fixedly mounted on the top of the insulating frame (211), an insulating rotating rod (222) longitudinally inserted into the mounting seat (221) and rotatably connected to the mounting seat (221), a conductive rod (223) vertically inserted into the insulating rotating rod (222), and an insulating handle (224) having one end fixed to the insulating rotating rod (222) and the other end passing through the corresponding side wall of the mounting seat (221) and extending to the outside; When the conductive rod (223) rotates to a horizontal position, two ends of the conductive rod (223) respectively abut against the metal rod (213) and the side wall of the load device body (1).

2. A load device for arc grounding simulation according to claim 1, characterized in that: An indicating rod (2241) is fixed to the outside of one end of the insulating handle (224) located inside the mounting seat (221); a corresponding position inside the mounting seat (221) is provided with an annular groove (2211) that allows the indicating rod (2241) to rotate circumferentially along the groove wall; elastic indicating parts (2212) are symmetrically fixed on both sides of the outer wall of the annular groove (2211) in the horizontal direction; and a groove (2242) that matches the elastic indicating part (2212) is provided at the end of the indicating rod (2241).

3. A load device for arc grounding simulation according to claim 1, characterized in that: Both ends of the conductive rod (223) are semicircular.

4. A load device for arc grounding simulation according to claim 1, characterized in that: The outer cover of the electrical testing component (2) is provided with a protection box (3) fixedly connected to the side wall of the load device body (1), and a protection door (4) is hinged on one side of the protection box (3).

5. A load device for arc grounding simulation according to claim 4, characterized in that: The upper top plate of the protection box (3) is inclined downward from the inside to the outside.

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