Wave recording device for power system faults

Abstract

The invention discloses a wave recording device for electric power system faults, and belongs to the technical field of electric power facilities, the wave recording device for the electric power system faults comprises a bottom shell and an upper cover which are hinged, a fault wave recorder body is arranged in the bottom shell, and a U-shaped handle is movably arranged at the end, away from the hinged end, of the bottom shell; a connecting assembly movably matched with the upper cover is arranged on the side, close to the U-shaped handle, of the bottom shell, an anti-disengaging assembly located between the U-shaped handle and the connecting assembly is arranged on the bottom shell, and a plurality of containing assemblies used for containing connecting wires are arranged on the inner side wall of the upper cover. And the device has the advantages of double locking, safety, reliability, stable supporting, orderly storage, convenience in taking, convenience in operation, simplicity, convenience and practicability.

Description

Technical Field

[0001] The present invention relates to the technical field of power facilities, and particularly to a waveform recording device for power system faults. Background Art

[0002] The fault recorder is used in the power system and can automatically and accurately record the changes of various electrical quantities before and after a fault occurs in the system. These electrical quantities include the system current, voltage and their derived quantities (such as active power and reactive power) as well as the whole process change phenomenon of the system frequency. According to the recorded waveforms, the exact location, development process and fault type of the faults occurring in the power system, line and equipment can be correctly analyzed and judged, so as to quickly eliminate the faults and formulate preventive countermeasures.

[0003] When a fault occurs in the power system, it is usually necessary for maintenance personnel to hold a portable fault recorder to the corresponding position to analyze and judge the fault. Most of the existing fault recorders achieve the opening and closing of the shell through a snap connection method. When moving the device, if the snap connection is not properly connected or the shell is accidentally opened under the action of external force during the movement, the fault recorder body inside the shell will fall to the ground, which may cause irreversible damage to the internal components and appearance of the fault recorder body, seriously affecting the use accuracy of the fault recorder body and making it inconvenient for maintenance personnel to quickly repair the power system.

[0004] Therefore, it is necessary to provide a waveform recording device for power system faults, aiming to solve the above problems. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the embodiment of the present invention is to provide a waveform recording device for power system faults to solve the problems in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: A waveform recording device for power system faults, comprising a bottom shell and an upper cover which are hinged. A fault recorder body is arranged inside the bottom shell. A U-shaped handle is movably arranged at one end of the bottom shell away from the hinge. A connecting component which is movably matched with the upper cover is arranged on one side of the bottom shell close to the U-shaped handle. An anti-disconnection component is arranged on the bottom shell between the U-shaped handle and the connecting component. A plurality of placing components for placing connecting wires are arranged on the inner side wall of the upper cover.

[0007] As a further solution of the present invention, the connection component includes two fixing cylinders installed at one end of the bottom shell close to the U-shaped handle. The two fixing cylinders are symmetrically distributed with respect to the U-shaped handle. A connecting pin is slidably arranged inside one end of the fixing cylinders close to each other. One end of the connecting pin close to the U-shaped handle is provided with an inclined surface. A strip-shaped through groove is opened on the side of the fixing cylinder away from the bottom shell. A push plate connected to the connecting pin is slidably arranged in the strip-shaped through groove. A spring is connected between the inner wall of the fixing cylinder and the connecting pin. On the side of the upper cover away from the hinged end, connecting plates are symmetrically installed. The outer ends of the connecting plates are connected with connecting cylinders that are movably inserted into the connecting pins.

[0008] As a further solution of the present invention, the anti-detachment component includes mounting frames symmetrically arranged at one end of the bottom shell close to the U-shaped handle. The two mounting frames are respectively located between the U-shaped handle and the corresponding connecting cylinder. A stepped cylindrical through groove is provided inside the mounting frame. A rotating cylinder connected to the end of the U-shaped handle is rotatably arranged inside one end of the stepped cylindrical through groove close to the U-shaped handle. A positioning pin that is movably inserted into the connecting cylinder is movably arranged at the other end of the stepped cylindrical through groove. A guiding chute is provided at one end of the positioning pin away from the U-shaped handle. A guiding slider that is slidably matched with the guiding chute is arranged at the end of the stepped cylindrical through groove away from the rotating cylinder. A spiral chute is spirally arranged at one end of the positioning pin close to the U-shaped handle. A sliding column connected to the inner wall of the rotating cylinder is slidably arranged in the spiral chute.

[0009] As a further solution of the present invention, the placement component includes a plurality of mounting brackets equidistantly distributed on the inner wall of the upper cover. Adjusting chutes and positioning slots are respectively provided on the mounting brackets. A sliding seat is slidably arranged in the adjusting chute. Supporting seats for supporting the connecting wires are arranged at the ends of the mounting brackets and on the sliding seat. An arc-shaped chute is opened inside the supporting seat. An arc-shaped sliding plate for positioning the connecting wire is slidably arranged in the arc-shaped chute. The outer end of the arc-shaped sliding plate is connected with a magnetic dial. A magnet is arranged at one end of the supporting seat away from the mounting bracket or the sliding seat. The magnet is in movable contact with the magnetic dial. A rotating rod passing through the positioning slot is rotatably arranged on the sliding seat. A dial rod is installed at the top of the rotating rod. A limiting cam located inside the positioning slot is installed on the rotating rod. The outermost end of the limiting cam is in movable abutment with the inner wall of the adjusting chute.

[0010] As a further solution of the present invention, the length of the inclined surface in the horizontal direction is greater than the length of the area where the connecting pin is inserted into the connecting cylinder.

[0011] As a further solution of the present invention, the positioning pin is coaxial with the connecting pin and the outer diameter of the positioning pin is the same as the outer diameter of the connecting pin.

[0012] As a further solution of the present invention, the supporting seat is set as a semi-circular ring.

[0013] As a further solution of the present invention, a plurality of placement components are equidistantly vertically distributed or equidistantly horizontally distributed.

[0014] In summary, the embodiments of the present invention have the following beneficial effects compared with the prior art: 1. In the present invention, when the push plate is pushed away from the U-shaped handle, the push plate drives the connecting pin to slide in the fixed cylinder, and the insertion between the connecting pin and the connecting cylinder is released, so that the device can be opened; when the upper cover is pushed down and turned over, the upper cover drives the connecting cylinder to rotate synchronously by connecting with the connecting plate, and the connecting cylinder pushes the connecting pin to move towards the inside of the fixed cylinder by abutting against the inclined surface. The spring is stressed and contracts. When the connecting cylinder rotates to be coaxial with the connecting pin, the spring elongates and pushes the connecting pin to move outwards. The connecting pin is inserted into one end of the connecting cylinder to position the position of the connecting cylinder, so that the bottom shell and the upper cover can be closed, and the device can be quickly disassembled and assembled; 2. In the present invention, during the upward turning process of the U-shaped handle, the U-shaped handle drives the rotating cylinder to rotate synchronously. The rotating cylinder drives the positioning pin to slide towards the outside of the mounting frame by the sliding fit of the sliding column and the spiral chute and the sliding fit of the guiding chute and the guiding slider. Since the positioning pin is coaxial with the connecting pin, the positioning pin moving outwards will be inserted into one end of the connecting cylinder away from the stepped cylindrical through groove, and the two ends of the connecting cylinder can be positioned, and the device can be doubly locked; during the process of the positioning pin remaining inserted into the connecting cylinder, when an external person accidentally touches the push plate and releases the connection between the connecting pin and the connecting cylinder, the fixing of the position of the connecting cylinder will not be released, and the device will not be accidentally opened, which can effectively ensure the safety of the device during the moving process; 3. In the present invention, the magnetic dial is toggled upwards to release the fit between the magnetic dial and the magnet, open the space above the support seat, place the two ends of the connecting wire on the fixed support seat and the movable support seat respectively, and then push the magnetic dial to rotate reversely around the axis of the support seat. The magnetic dial fits with the magnet again to fix the position of the arc-shaped slide plate. The arc-shaped slide plate positions the end of the connecting wire by cooperating with the support seat; 4. In the present invention, by adjusting the position of the sliding seat, the storage requirements of connecting wires of different lengths can be met, avoiding the drawback that the middle parts of connecting wires of different lengths are wound together, and facilitating the tensioning treatment of the connecting wires; through a plurality of placing components, connecting wires of different lengths can be stably supported and orderly placed, avoiding the winding phenomenon that is likely to occur when several connecting wires are mixed together, and facilitating the taking and use of the connecting wires.

[0015] To more clearly illustrate the structural features and functions of the present invention, the present invention will be described in detail below with reference to the drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. is a schematic structural diagram of the closed state of the wave recording device for power system faults in the embodiment of the invention.

[0017] Figure 2 It is a schematic structural diagram of the open state of the oscillograph device for power system faults in the invention embodiment.

[0018] Figure 3 It is a schematic structural diagram of the bottom case in the invention embodiment.

[0019] Figure 4 It is Figure 3 The partial enlarged view at position A in

[0020] Figure 5 It is Figure 3 The partial enlarged view at position B in

[0021] Figure 6 It is a cross-sectional view of the installation frame in the invention embodiment.

[0022] Figure 7 It is an exploded view of the positioning pin and the rotating cylinder in the invention embodiment.

[0023] Figure 8 It is a schematic structural diagram of the placement component in the invention embodiment.

[0024] Figure 9 It is Figure 7 The partial enlarged view at position C in

[0025] Figure 10 It is an exploded view of the support base and the arc-shaped slide plate in the invention embodiment.

[0026] Figure 11 It is a schematic structural diagram of the sliding seat in the invention embodiment.

[0027] Reference numerals: 1, bottom case; 2, upper cover; 3, U-shaped handle; 4, connection component; 401, fixed cylinder; 402, connecting nail; 403, inclined surface; 404, strip-shaped through groove; 405, push plate; 406, spring; 407, connecting cylinder; 408, connecting plate; 5, anti-disengagement component; 501, installation frame; 502, stepped cylindrical through groove; 503, positioning pin; 504, guide slider; 505, rotating cylinder; 506, sliding column; 507, guide chute; 508, spiral chute; 6, placement component; 601, installation rack; 602, adjustment chute; 603, positioning groove; 604, sliding seat; 605, support base; 606, arc-shaped slide plate; 607, magnetic dial; 608, arc-shaped chute; 609, magnet; 610, rotating rod; 611, dial rod; 612, limiting cam; 7, connecting wire; 8, fault recorder body. Detailed implementation manners

[0028] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] The following describes in detail the specific implementation of the present invention with reference to specific embodiments.

[0030] In an embodiment of the present invention, refer to Figures 1-2 , a waveform recording device for power system faults includes a hinged bottom case 1 and an upper cover 2. A fault recorder body 8 is provided inside the bottom case 1. A U-shaped handle 3 is movably provided at one end of the bottom case 1 away from the hinge. A connection assembly 4 that is movably matched with the upper cover 2 is provided on one side of the bottom case 1 close to the U-shaped handle 3. An anti-disconnection assembly 5 is provided on the bottom case 1 between the U-shaped handle 3 and the connection assembly 4. A plurality of placement assemblies 6 for placing connection wires 7 are provided on the inner side wall of the upper cover 2.

[0031] In this embodiment, through the connection assembly 4, the quick connection between the bottom case 1 and the upper cover 2 can be realized. Through the cooperation of the U-shaped handle 3, the connection assembly 4 and the anti-disconnection assembly 5, during the process of moving the device, automatic double locking of the device can be realized, effectively preventing the device from being accidentally opened, avoiding the phenomenon that the fault recorder body 8 drops during the movement of the device, improving the safety of the fault recorder body 8. Through the placement assembly 6, connection wires 7 of different lengths can be stably supported and orderly stored, avoiding the inconvenience of subsequent quick taking after the plurality of connection wires 7 are randomly placed, and having the effects of double locking, safe and reliable, stable support, orderly storage, convenient taking, convenient operation and simple and practical.

[0032] In an embodiment of the present invention, refer to Figures 1-4 , the connection assembly 4 includes two fixed cylinders 401 installed at one end of the bottom case 1 close to the U-shaped handle 3. The two fixed cylinders 401 are symmetrically distributed about the U-shaped handle 3. A connection pin 402 is slidably provided inside the mutually close ends of the fixed cylinders 401. An inclined surface 403 is provided at one end of the connection pin 402 close to the U-shaped handle 3. A strip-shaped through groove 404 is opened on the side of the fixed cylinder 401 away from the bottom case 1. A push plate 405 connected to the connection pin 402 is slidably provided in the strip-shaped through groove 404. A spring 406 is connected between the inner wall of the fixed cylinder 401 and the connection pin 402. Connection plates 408 are symmetrically installed on the side of the upper cover 2 away from the hinge end. A connection cylinder 407 that is movably inserted with the connection pin 402 is connected to the outer end of the connection plate 408.

[0033] In this embodiment, in the initial state, one end of the connecting pin 402 close to the inclined surface 403 is inserted into the connecting cylinder 407. The spring 406 is in its original length. The push plate 405 is located at one end of the strip-shaped through groove 404 close to the U-shaped handle 3. At this time, the position of the connecting cylinder 407 is fixed, and the bottom case 1 and the upper cover 2 are in a closed state; When the device needs to be opened, push the push plate 405 away from the U-shaped handle 3. The push plate 405 drives the connecting pin 402 to slide in the fixed cylinder 401, releasing the insertion between the connecting pin 402 and the connecting cylinder 407, making the connecting cylinder 407 in a movable state. Push the connecting cylinder 407 upward. The connecting cylinder 407 drives the upper cover 2 to flip upward synchronously by connecting with the connecting plate 408, and the opening of the device can be realized. Then release the push plate 405. The spring 406 elongates and pushes the connecting pin 402 to move outward, and the connecting pin 402 resets; When the device needs to be closed, push the upper cover 2 to flip downward. The upper cover 2 drives the connecting cylinder 407 to rotate synchronously by connecting with the connecting plate 408. When the connecting cylinder 407 rotates downward by a certain angle, one end of the connecting cylinder 407 away from the bottom case 1 starts to contact the inclined surface 403. When the connecting cylinder 407 continues to rotate downward, the connecting cylinder 407 pushes the connecting pin 402 to move inside the fixed cylinder 401 by abutting against the inclined surface 403. The spring 406 is stressed and contracts. When the connecting cylinder 407 rotates to be coaxial with the connecting pin 402, the spring 406 elongates and pushes the connecting pin 402 to move outward, and the connecting pin 402 is inserted into one end of the connecting cylinder 407, realizing the positioning of the position of the connecting cylinder 407, and thus realizing the closing of the bottom case 1 and the upper cover 2, and the rapid disassembly and assembly of the device can be realized; Wherein, the length of the inclined surface 403 in the horizontal direction is greater than the length of the area where the connecting pin 402 is inserted into the connecting cylinder 407, which can ensure that the outer end of the connecting cylinder 407 abuts against the inclined surface 403, avoiding the interference phenomenon between the connecting cylinder 407 and the connecting pin 402 during the downward rotation process, and improving the reliability of the device.

[0034] In an embodiment of the present invention, refer to Figures 1-7, the anti - detachment component 5 includes mounting frames 501 symmetrically arranged at one end of the bottom shell 1 close to the U - shaped handle 3. The two mounting frames 501 are respectively located between the U - shaped handle 3 and the corresponding connecting cylinder 407. A stepped cylindrical through - groove 502 is provided inside the mounting frame 501. A rotating cylinder 505 connected to the end of the U - shaped handle 3 is rotatably arranged inside one end of the stepped cylindrical through - groove 502 close to the U - shaped handle 3. A positioning pin 503 that is movably inserted into the connecting cylinder 407 is movably arranged at the other end of the stepped cylindrical through - groove 502. The positioning pin 503 is coaxial with the connecting nail 402. A guiding chute 507 is provided at one end of the positioning pin 503 away from the U - shaped handle 3. A guiding slider 504 that is slidably engaged with the guiding chute 507 is arranged at one end of the stepped cylindrical through - groove 502 away from the rotating cylinder 505. A spiral chute 508 is spirally arranged at one end of the positioning pin 503 close to the U - shaped handle 3. A sliding column 506 connected to the inner wall of the rotating cylinder 505 is slidably arranged inside the spiral chute 508.

[0035] In this embodiment, in the initial state, the device is placed on the platform, and the middle part of the U - shaped handle 3 is in contact with the outside of the bottom shell 1. At this time, the positioning pin 503 is located inside the mounting frame 501 and is not inserted into the connecting cylinder 407. The guiding slider 504 is located at one end of the guiding chute 507 close to the connecting cylinder 407, and the sliding column 506 is located at one end of the spiral chute 508 close to the guiding chute 507. At this time, through the connecting component 4, the connection between the bottom shell 1 and the upper cover 2 can be realized; When the device needs to be moved, the U - shaped handle 3 is turned upwards so that the middle part of the U - shaped handle 3 is away from the bottom shell 1. The staff holds the middle part of the U - shaped handle 3 and lifts the device. Under the action of its own gravity, the device is vertically downward, so that the U - shaped handle 3 and the bottom shell 1 are in the same plane; During the process of the U - shaped handle 3 turning upwards, the U - shaped handle 3 drives the rotating cylinder 505 to rotate synchronously. The rotating cylinder 505 drives the positioning pin 503 to slide outwards of the mounting frame 501 in a way that the sliding column 506 slides with the spiral chute 508 and the guiding chute 507 slides with the guiding slider 504. Since the positioning pin 503 is coaxial with the connecting nail 402, the positioning pin 503 moving outwards will be inserted into one end of the connecting cylinder 407 away from the stepped cylindrical through - groove 502, and the positioning of both ends of the connecting cylinder 407 can be realized; During the process of the positioning pin 503 remaining inserted into the connecting cylinder 407, when an external person accidentally touches the push plate 405 and causes the connection between the connecting nail 402 and the connecting cylinder 407 to be released, the fixing of the position of the connecting cylinder 407 will not be released, and thus the device will not be accidentally opened, which can effectively ensure the safety of the device during the moving process; Among them, the outer diameter of the positioning pin 503 is the same as the outer diameter of the connecting nail 402, which can ensure that the positioning pin 503 can be inserted into the connecting cylinder 407.

[0036] In an embodiment of the present invention, refer to Figure 2 and Figures 8-11 . The placing component 6 includes a plurality of mounting frames 601 evenly distributed on the inner wall of the upper cover 2. The mounting frames 601 are respectively provided with an adjusting chute 602 and a positioning groove 603. A sliding seat 604 is slidably arranged in the adjusting chute 602. Support seats 605 for supporting the connecting wire 7 are arranged at the end of the mounting frame 601 and on the sliding seat 604. The support seat 605 is in the shape of a semi-circular ring. An arc-shaped chute 608 is formed in the support seat 605. An arc-shaped sliding plate 606 for positioning the connecting wire 7 is slidably arranged in the arc-shaped chute 608. The outer end of the arc-shaped sliding plate 606 is connected with a magnetic dial 607. A magnet 609 is arranged at one end of the support seat 605 away from the mounting frame 601 or the sliding seat 604. The magnet 609 is in movable contact with the magnetic dial 607. A rotating rod 610 passing through the positioning groove 603 is rotatably arranged on the sliding seat 604. A dial rod 611 is installed at the top of the rotating rod 610. A limiting cam 612 located inside the positioning groove 603 is installed on the rotating rod 610. The outermost end of the limiting cam 612 is in movable abutment with the inner wall of the adjusting chute 602.

[0037] In this embodiment, in the initial state, the two support seats 605 are located at the same end of the mounting frame 601. The limiting cam 612 abuts against the inner wall of the adjusting chute 602. The outer end of the dial rod 611 is far away from the upper cover 2. The position of the sliding seat 604 is fixed. The magnetic dial 607 is attached to the magnet 609 under the action of magnetic force. A cylindrical placing groove is formed between the arc-shaped sliding plate 606 and the support seat 605. This cylindrical placing groove can be used to place the connecting wire 7. Among them, the support seat 605 on the mounting frame 601 is the fixed support seat 605, and the support seat 605 on the sliding seat 604 is the movable support seat 605; When the connecting wire 7 needs to be placed, the magnetic dial 607 is pushed upward to release the attachment between the magnetic dial 607 and the magnet 609. The magnetic dial 607 rotates upward around the axis of the support seat 605 in a manner of sliding cooperation between the arc-shaped sliding plate 606 and the arc-shaped chute 608, so that the arc-shaped sliding plate 606 is inside the support seat 605 and the space above the support seat 605 is opened. The two ends of the connecting wire 7 are respectively placed on the fixed support seat 605 and the movable support seat 605. Then, the magnetic dial 607 is pushed to rotate reversely around the axis of the support seat 605. The magnetic dial 607 drives the arc-shaped sliding plate 606 to rotate synchronously in a manner of sliding cooperation between the arc-shaped sliding plate 606 and the arc-shaped chute 608. When the magnetic dial 607 rotates a certain angle, the magnetic dial 607 is attached to the magnet 609 again, and the position of the arc-shaped sliding plate 606 can be fixed. The arc-shaped sliding plate 606 positions the end of the connecting wire 7 by cooperating with the support seat 605; By adjusting the position of the sliding seat 604, the storage requirements of connecting wires 7 with different lengths can be met, avoiding the drawback that the middle parts of connecting wires 7 with different lengths are wound together. Specifically, turn the lever 611 clockwise or counterclockwise. The lever 611 drives the limit cam 612 to rotate synchronously by connecting with the rotating rod 610, releasing the abutment between the limit cam 612 and the adjustment chute 602, and pushing the sliding seat 604 to slide in the positioning groove 603 to a suitable position, so that the length direction of the connecting wire 7 is parallel to the length direction of the mounting bracket 601. Then, turn the lever 611 in the reverse direction. The lever 611 drives the limit cam 612 to rotate synchronously by connecting with the rotating rod 610, and the re-abutment between the limit cam 612 and the adjustment chute 602 can be realized, thereby realizing the positioning of the position of the sliding seat 604, facilitating the tensioning treatment of the connecting wire 7; through a plurality of placement components 6, the connecting wires 7 with different lengths can be stably supported and orderly placed, avoiding the winding phenomenon that is likely to occur when a plurality of connecting wires 7 are mixed together, and facilitating the taking and use of the connecting wires 7; Among them, a plurality of placement components 6 can be vertically distributed at equal intervals or horizontally distributed at equal intervals, which can meet different usage requirements in actual situations; when a plurality of placement components 6 are vertically distributed at equal intervals, a plurality of connecting wires 7 are in a horizontal state; when a plurality of placement components 6 are horizontally distributed at equal intervals, a plurality of connecting wires 7 are in a vertical state. At this time, the rotating rod 610, the lever 611 and the limit cam 612 can be set differently. The support seat 605 in a fixed state is arranged at the top of the mounting bracket 601, and the support seat 605 in a movable state will slide downward under the action of its own gravity. After the top end of the connecting wire 7 is positioned, the bottom end of the connecting wire 7 will slide downward along with the movable support seat 605, realizing the natural vertical state of the connecting wire 7, which helps the orderly storage of the connecting wire 7.

[0038] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A waveform recording device for power system faults, characterized in that, It includes a hinged bottom case and an upper cover. A fault recorder body is provided inside the bottom case. A U-shaped handle is movably provided at one end of the bottom case away from the hinge. A connection component that is movably matched with the upper cover is provided on one side of the bottom case near the U-shaped handle. An anti-disengagement component located between the U-shaped handle and the connection component is provided on the bottom case. A plurality of placement components for placing connection wires are provided on the inner side wall of the upper cover.

2. The waveform recording device for power system faults according to claim 1, wherein The connection component includes two fixed cylinders installed at one end of the bottom case near the U-shaped handle. The two fixed cylinders are symmetrically distributed with respect to the U-shaped handle. A connection pin is slidably provided inside the mutually approaching ends of the fixed cylinders. An inclined surface is provided at one end of the connection pin near the U-shaped handle. A strip-shaped through groove is opened on the side of the fixed cylinder away from the bottom case. A push plate connected to the connection pin is slidably provided in the strip-shaped through groove. A spring is connected between the inner wall of the fixed cylinder and the connection pin. Connecting plates are symmetrically installed on the side of the upper cover away from the hinge end. A connection cylinder that is movably inserted into the connection pin is connected to the outer end of the connecting plate.

3. The wave recording device for power system faults according to claim 2, characterized in that, The anti-disengagement component includes mounting frames symmetrically provided at one end of the bottom case near the U-shaped handle. The two mounting frames are respectively located between the U-shaped handle and the corresponding connection cylinder. A stepped cylindrical through groove is provided inside the mounting frame. A rotating cylinder connected to the end of the U-shaped handle is rotatably provided inside the end of the stepped cylindrical through groove near the U-shaped handle. A positioning pin that is movably inserted into the connection cylinder is movably provided at the other end of the stepped cylindrical through groove. A guiding chute is provided at one end of the positioning pin away from the U-shaped handle. A guiding slider that is slidably matched with the guiding chute is provided at the end of the stepped cylindrical through groove away from the rotating cylinder. A spiral chute is spirally provided at one end of the positioning pin near the U-shaped handle. A sliding column connected to the inner wall of the rotating cylinder is slidably provided in the spiral chute.

4. The wave recording device for power system faults according to claim 1, characterized in that The placement component includes a plurality of mounting frames equidistantly distributed on the inner wall of the upper cover. Adjusting chutes and positioning slots are respectively provided on the mounting frames. A sliding seat is slidably provided in the adjusting chute. Support seats for supporting the connection wires are provided at the ends of the mounting frame and the sliding seat. An arc-shaped chute is provided inside the support seat. An arc-shaped sliding plate for positioning the connection wire is slidably provided in the arc-shaped chute. A magnetic dial is connected to the outer end of the arc-shaped sliding plate. A magnet is provided at one end of the support seat away from the mounting frame or the sliding seat. The magnet is in movable contact with the magnetic dial. A rotating rod passing through the positioning slot is rotatably provided on the sliding seat. A dial rod is installed at the top of the rotating rod. A limiting cam located inside the positioning slot is installed on the rotating rod. The outermost end of the limiting cam is in movable abutment with the inner wall of the adjusting chute.

5. The oscillograph device for power system faults according to claim 2, characterized in that, The length of the inclined surface in the horizontal direction is greater than the length of the area where the connection pin is inserted into the connection cylinder.

6. The oscillograph device for power system faults according to claim 3, wherein The positioning pin is coaxial with the connection pin and the outer diameter of the positioning pin is the same as the outer diameter of the connection pin.

7. The wave recording device for power system faults according to claim 4, characterized in that, The support seat is set as a semi-circular ring.

8. The wave recording device for power system faults according to claim 1, wherein A plurality of placement components are equidistantly vertically distributed or equidistantly horizontally distributed.

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