A power transmission line short circuit fault detection device

Abstract

The utility model discloses a power transmission line short circuit fault detection device, including main box and short circuit reaction structure, the output piece on short circuit reaction structure is connected with the push -board, and the push -board end part is provided with the conversion board, and the conversion board slidingly is established in the main box, and the conversion board bottom is connected with the friction limiting piece, and the friction limiting piece sets up on the main box, and the conversion board is connected with the elastic member under the stretch state, and the telescopic direction of elastic member is same with the sliding direction of conversion board. The utility model sets up the conversion board in the critical position with the friction limiting piece connection with elastic member, so that conversion board will break this connection critical position only if receiving the external force in the sliding direction, and under the trend of elastic member retraction drives the conversion board to move the larger stroke, thereby forms when the power transmission line short circuit, and the reaction piece drives the push -board to move the smaller amplitude situation, can through the elastic member drive conversion board to move the larger stroke, reaches amplification moving stroke, improves the purpose of display effect.

Description

Technical Field

[0001] This utility model relates to the field of circuit detection technology, specifically to a short-circuit fault detection device for power transmission lines. Background Technology

[0002] In the field of circuit testing, short-circuit detection devices are commonly used tools for quickly identifying short-circuit faults in circuits. Traditional short-circuit detection devices typically use detection lights (such as LED lights or indicator lights) to indicate the test results. However, because detection lights are usually small, they are easily overlooked in complex or brightly lit environments, causing operators to fail to detect short circuits in a timely manner. Furthermore, relying solely on light indicators is rather simplistic and lacks more intuitive and easily identifiable warning methods.

[0003] To address these issues, existing technologies have proposed using physical methods to indicate short circuits. For example, the instantaneous large current generated by the detection wires during a short circuit creates a repulsive magnetic force between the wires, which in turn pushes a plate (such as a pop-out plate) to pop out, thus indicating a short circuit. This design is more intuitive than traditional light indicators and can improve the visibility of the detection results to a certain extent.

[0004] However, this solution still has shortcomings in practical applications: due to the limited range of magnetic repulsion, the ejection stroke of the plate is usually short and the ejection amplitude is small, resulting in the ejected plate not being conspicuous enough. Especially in complex electrical equipment or dense wiring environments, operators may still find it difficult to quickly and accurately identify the short circuit condition. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model specifically provides the following technical solution:

[0006] A short-circuit fault detection device for transmission lines includes a main box and a short-circuit response structure disposed within the main box. When a short circuit is detected, the output plate on the short-circuit response structure bulges outward. A push plate is connected to the output plate, and a conversion plate is disposed at the end of the push plate. The conversion plate is slidably disposed within the main box, and the sliding direction of the conversion plate is the same as the direction in which the output plate bulges.

[0007] The bottom of the conversion plate is connected to a friction limiting member, which is set on the main box. The conversion plate is connected to an elastic member in a stretched state. The extension and contraction direction of the elastic member is the same as the sliding direction of the conversion plate. The elastic member in the stretched state maintains the conversion plate at the critical position connected to the friction limiting member. After the output plate bulges, it pushes the conversion plate through the push plate to break through the critical position and slides outward under the action of the elastic member.

[0008] As a preferred embodiment of this utility model, the friction limiting component includes a telescopic spring, one end of which is fixedly connected to the main box, and the other end is connected to a limiting plate. The limiting plate is longitudinally telescopically arranged above the bottom surface of the main box, and a limiting protrusion is provided on the top of the limiting plate. The limiting protrusion is connected to the conversion plate.

[0009] As a preferred embodiment of this utility model, the limiting plate is provided with sliding grooves on both sides, and the conversion plate is slidably disposed in the sliding grooves by means of a mounting bracket.

[0010] As a preferred embodiment of this utility model, a rotation limiting component is provided in the slide groove. The rotation limiting component includes a mounting groove formed on the top surface of the slide groove. A main shaft is rotatably arranged in the mounting groove. One end of the main shaft protrudes from the main box and is connected to a handle. A protruding joint is coaxially fixedly connected to the main shaft. The protruding joint rotates and protrudes from the bottom surface of the slide groove to limit the conversion plate to the critical position connected with the limiting plate.

[0011] As a preferred embodiment of this utility model, the elastic element is provided with limiting optical shafts on both sides. One end of the limiting optical shaft is fixedly connected to the conversion plate, and the other end extends outward through the main box and is connected to a display element. The limiting optical shaft is axially slidably connected to the main box.

[0012] As a preferred embodiment of this utility model, the short-circuit response structure includes an input terminal, an input piece, an output terminal, and an output piece. The input terminal is connected to the input piece, the input piece is fixedly connected inside the main box, the input piece is connected to the output piece through a conductive element, the output piece is fixedly disposed inside the main box, and the output piece is connected to the output terminal.

[0013] Compared with the prior art, this utility model has the following advantages:

[0014] This invention utilizes an elastic element to position the conversion plate at a critical point where it connects with the friction limiting element. This allows the conversion plate to break through this critical connection point whenever it is subjected to an external force in the sliding direction. Furthermore, the elastic element's retraction causes the conversion plate to move a larger distance. This results in a situation where, during a short circuit in the transmission line, the reaction plate moves the push plate by a small amount, while the elastic element drives the conversion plate to move a larger distance, thereby amplifying the movement distance and improving the display effect. Attached Figure Description

[0015] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is one of the side cross-sectional structural diagrams of this utility model;

[0018] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle;

[0019] Figure 4 This is the second side sectional view of the present invention;

[0020] Figure 5 This utility model Figure 4 Enlarged view of point B in the middle.

[0021] The labels in the diagram represent the following:

[0022] 1. Main box; 2. Short-circuit response structure; 3. Output plate; 4. Push plate; 5. Conversion plate; 6. Friction limiting component; 7. Elastic component; 8. Telescopic spring; 9. Limiting plate; 10. Limiting protrusion; 11. Slide groove; 12. Mounting bracket; 13. Mounting slot; 14. Spindle; 15. Grip; 16. Protruding section; 17. Limiting optical axis; 18. Display component; 19. Input terminal; 20. Input plate; 21. Output terminal. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1 As shown, this utility model provides a short-circuit fault detection device for transmission lines, including a main box 1 and a short-circuit response structure 2 disposed within the main box 1. The main box 1 is a rectangular metal or high-strength plastic shell with good protective performance, and its internal space is used to accommodate various functional components.

[0025] The short-circuit reaction structure 2 uses a detection wire or a similar conductive element. When a short circuit occurs in the circuit, the detection wire is subjected to a large instantaneous current, which generates a magnetic repulsion force, causing the output plate 3 on it to bulge outward.

[0026] like Figure 1 As shown, the short-circuit response structure 2 includes an input terminal 19, an input piece 20, an output terminal 21, and an output piece 3. The input terminal 19 is connected to the input piece 20, which is fixedly connected inside the main box 1. The input piece 20 is connected to the output piece 3 through a conductive component. The output piece 3 is fixedly installed inside the main box 1 and is connected to the output terminal 21.

[0027] Input terminal 19 connects to the circuit. When a short circuit occurs in the circuit, a large current will be generated. At this time, the current enters from the input terminal and outputs from the output terminal 21. There are currents in opposite directions on the input piece 20 and the output piece 3. Therefore, there will be magnetic repulsion between the input piece 20 and the output piece 3. At this time, the output piece 3 will bulge outward (specifically, the input piece 20 is made of a metal sheet with high strength and not easy to bend, while the output piece 3 is made of a metal sheet with a thinner thickness and easy to bend in the middle. The two ends of the output piece 3 are fixed, and under the repulsion, the middle part bulges outward). A push plate 4 is connected to the output piece 3. The push plate 4 is a rigid plate structure with its end extending towards the conversion plate 5. There is a small gap between the push plate 4 and the conversion plate 5, which is less than the height of the bulge of the output piece 3.

[0028] like Figure 1 As shown, the conversion plate 5 is a rectangular plate, slidably mounted inside the main box 1, with its sliding direction aligned with the bulging direction of the output plate 3 (i.e., along the Z-axis). Slide grooves 11 are provided on both sides of the limiting plate 9, extending along the bulging direction of the output plate 3 and formed on the bottom surface of the main box 1. The conversion plate 5 is slidably mounted within the slide grooves 11 via mounting brackets 12. The mounting brackets 12 are L-shaped brackets, fixed to both sides of the conversion plate 5, with their bottoms embedded in the slide grooves 11. Low-friction materials (such as a polytetrafluoroethylene coating) reduce sliding resistance. The length of the slide grooves 11 matches the sliding stroke of the conversion plate 5, ensuring that the conversion plate 5 can slide fully under the action of the elastic element 7. The inner wall of the slide grooves 11 is smooth, and its width is slightly greater than the thickness of the mounting brackets 12, ensuring the stability of the conversion plate 5 during sliding.

[0029] like Figure 1As shown, a friction limiting component 6 is provided at the bottom of the conversion plate 5. The friction limiting component 6 is fixed to the bottom surface of the main box 1 and is used to limit the initial position of the conversion plate 5. The friction limiting component 6 includes a telescopic spring 8 and a limiting plate 9. One end of the telescopic spring 8 is fixed to the bottom surface of the main box 1, and the other end is connected to the limiting plate 9. Under the action of the telescopic spring 8, the limiting plate 9 is longitudinally telescopically positioned above the bottom surface of the main box 1, and a limiting protrusion 10 is provided at its top. The limiting protrusion 10 is a semi-circular or trapezoidal protrusion that contacts the protrusion at the bottom of the conversion plate 5 to form a frictional connection. Specifically, the spring constant of the telescopic spring 8 is small, and it is in a slightly compressed state in the initial state to ensure that the limiting plate 9 contacts the conversion plate 5. The bottom protrusion of the conversion plate 5 matches and contacts the limiting protrusion 10. When the output plate 3 is not raised, the limiting protrusion 10 limits the conversion plate 5 to the critical position through friction and the preload of the telescopic spring 8. At this critical position, the frictional force between the limiting protrusion 10 and the conversion plate 5 is similar to the tension of the elastic element 7, keeping the conversion plate 5 in a state where it is just in contact with the limiting protrusion 10 without retracting. That is, after being subjected to a very small pushing force in the same direction as the conversion plate 5 (the pushing force of the push plate 4), the conversion plate 5 will break through this frictional force and break through the critical position. Driven by the retraction of the elastic element 7, the conversion plate 5 will slide, achieving a rapid response.

[0030] An elastic element 7 is connected to the conversion plate 5. One end of the elastic element 7 is fixed to the conversion plate 5, and the other end is fixed to the inner wall of the main box 1. The extension and retraction direction of the elastic element 7 is the same as the sliding direction of the conversion plate 5. Initially, the elastic element 7 is in a stretched state, and its tension keeps the conversion plate 5 at the critical position connected to the friction limiting element 6. That is, the conversion plate 5 is resisted by the friction limiting element 6 and is in a stationary state. When a short circuit occurs, the detection wire generates a magnetic repulsive force, the output plate 3 bulges, and pushes the push plate 4 to move. The push plate 4 then drives the conversion plate 5 to overcome the resistance of the friction limiting element 6 and break through the critical position. After breaking through the critical position, the tension of the elastic element 7 causes the conversion plate 5 to slide rapidly outward along the slide groove 11, which significantly improves the visibility of the short circuit state.

[0031] To improve structural stability and prevent the conversion plate 5 from breaking through the friction with the limiting protrusion 10 due to slight vibration, a rotation limiting component is further provided within the slide groove 11. The rotation limiting component includes a mounting groove 13 formed on the top surface of the slide groove 11. The mounting groove 13 is a rectangular groove containing a main shaft 14. The main shaft 14 is a metal cylinder that passes through both slide grooves 11. One end of the main shaft 14 protrudes from the outer wall of the main box 1 and is connected to a handle 15. The handle 15 is a knob made of plastic or rubber for easy manual operation. The main shaft 14 is connected to the main box 1 via a threaded engagement to apply a certain preload. Figure 3A protruding section 16 is coaxially fixedly connected to the main shaft 14. The protruding section 16 has an elliptical or cam-shaped structure, and its maximum radial protrusion can rotate above the top surface of the slide groove 11. In the initial state, the protruding section 16 is rotated to the maximum protrusion position and is set on one side of the mounting bracket 12, limiting the conversion plate 5 to the critical position connected with the limiting plate 9. This ensures that even if the conversion plate 5 is subjected to pressure that could exceed the critical position, it will still be limited by the protruding section 16 and cannot slide outward. When needed, the operator rotates the handle 15 to rotate the protruding section 16 to the minimum protrusion position, so that the protrusion is hidden in the mounting groove 13. A more suitable position is for the protruding section 16 to be laterally positioned to fill the opening at the top of the mounting groove 13 so that the mounting bracket 12 can slide in the slide groove 11. Before actual use, the protrusion 16 restricts the mounting bracket 12 to prevent the conversion plate 5 from accidentally retracting due to vibration or other factors. When needed, the protrusion 16 is rotated and retracted. At this time, the conversion plate 5 is in a critical state only through friction, so that it will move when the output plate 3 is significantly raised.

[0032] Further, limiting optical axes 17 and display elements 18 are added to enhance the stability of the sliding of the conversion plate 5 and the intuitive indication of short circuit status. A limiting optical axis 17 is provided on each side of the elastic element 7. The limiting optical axis 17 is a smooth metal rod, one end of which is fixed to the conversion plate 5 by bolts, and the other end extends outward through a pre-drilled hole in the main box 1, connecting to the display element 18 at the end. The display element 18 can be a red or fluorescent plastic marker block, with the words "short circuit" or a warning symbol on its surface. The limiting optical axes 17 are slidably connected to the main box 1 to ensure smooth axial sliding. When the conversion plate 5 slides outward under the action of the elastic element 7, the limiting optical axes 17 move synchronously with the conversion plate 5, causing the display element 18 to protrude beyond the main box 1, forming a significant visual indication.

[0033] The setting of the limiting optical axis 17 can also prevent the conversion plate 5 from tilting or rotating during the sliding process, further improving the sliding stability.

[0034] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A short-circuit fault detection device for transmission lines, characterized in that, Includes a main box (1) and a short-circuit reaction structure (2) disposed in the main box (1). When a short circuit is detected, the output plate (3) on the short-circuit reaction structure (2) bulges outward. A push plate (4) is connected to the output plate (3). A conversion plate (5) is disposed at the end of the push plate (4). The conversion plate (5) is slidably disposed in the main box (1). The sliding direction of the conversion plate (5) is the same as the bulging direction of the output plate (3). The bottom of the conversion plate (5) is connected to a friction limiting member (6), which is set on the main box (1). The conversion plate (5) is connected to an elastic member (7) in a stretched state. The extension and retraction direction of the elastic member (7) is the same as the sliding direction of the conversion plate (5). The elastic member (7) in a stretched state keeps the conversion plate (5) at the critical position connected to the friction limiting member (6). After the output plate (3) bulges, it pushes the conversion plate (5) through the push plate (4) to break through the critical position and slide outward under the action of the elastic member (7).

2. The short-circuit fault detection device for transmission lines according to claim 1, characterized in that, The friction limiting component (6) includes a telescopic spring (8), one end of which is fixedly connected to the main box (1), and the other end is connected to a limiting plate (9). The limiting plate (9) is longitudinally telescopically arranged above the bottom surface of the main box (1). A limiting protrusion (10) is provided on the top of the limiting plate (9), and the limiting protrusion (10) is connected to the conversion plate (5).

3. The short-circuit fault detection device for transmission lines according to claim 2, characterized in that, The limiting plate (9) has sliding grooves (11) on both sides, and the conversion plate (5) is slidably disposed in the sliding grooves (11) by means of the mounting bracket (12).

4. The short-circuit fault detection device for transmission lines according to claim 3, characterized in that, A rotation limiting component is provided in the slide (11). The rotation limiting component includes a mounting groove (13) opened on the top surface of the slide (11). A main shaft (14) is rotatably arranged in the mounting groove (13). One end of the main shaft (14) protrudes from the main box (1) and is connected to a handle (15). A protruding joint (16) is coaxially fixedly connected to the main shaft (14). The protruding joint (16) rotatably protrudes from the bottom surface of the slide (11) to limit the conversion plate (5) to the critical position connected with the limiting plate (9).

5. The short-circuit fault detection device for transmission lines according to claim 4, characterized in that, The elastic element (7) is provided with limiting optical shafts (17) on both sides. One end of the limiting optical shaft (17) is fixedly connected to the conversion plate (5), and the other end extends outward through the main box (1) and is connected to the display element (18). The limiting optical shaft (17) is axially slidably connected to the main box (1).

6. The short-circuit fault detection device for transmission lines according to claim 1, characterized in that, The short-circuit response structure (2) includes an input terminal (19), an input piece (20), an output terminal (21), and an output piece (3). The input terminal (19) is connected to the input piece (20). The input piece (20) is fixedly connected inside the main box (1). The input piece (20) is connected to the output piece (3) through a conductive element. The output piece (3) is fixedly disposed inside the main box (1). The output piece (3) is connected to the output terminal (21).

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