A substation harmonic detection device

Abstract

The utility model discloses a transformer substation harmonic detection device relates to electric power detection technical field. The utility model discloses a supporting pipe, the top of supporting pipe is provided with the suspension clamping assembly, and the clamping end of suspension clamping assembly is provided with detection assembly, and the bottom of drive assembly is provided with traction assembly between supporting pipe and suspension clamping assembly, and the bottom of traction assembly is provided with rotating assembly. The utility model discloses a supporting pipe can be hung to the outer surface of the cable of the high -altitude erection of suspension clamping assembly, and the clamping of cable is completed to suspension clamping assembly through rotating assembly, traction assembly and drive assembly, the detection end of detection assembly also is at the outside of cable at this moment, since rotating assembly sets up at the bottom of supporting pipe, thereby making the whole detection process, and the operator can complete all operations on the ground, and this characteristic makes when carrying out harmonic detection to the cable of the high -altitude erection, and the safety can be effectively guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of power detection technology, and specifically relates to a substation harmonic detection device. Background Technology

[0002] Substations are critical locations for the concentration and distribution of electrical energy. When resonance occurs in the power system of a substation, voltage and current amplify dramatically, potentially causing equipment damage or even power system malfunctions. Therefore, it is necessary to regularly perform harmonic detection on the substation's power system using harmonic detection devices to ensure that the substation provides users with high-quality electrical energy.

[0003] Chinese Patent Network CN220691013U discloses a converter harmonic detection mechanism. When detecting harmonics in the current inside a cable using this device, the wire is inserted into the clamping chamber through the wire insertion hole. Then, the limiting ring slides downward, causing the vertical slide rod to move downward. The downward movement of the vertical slide rod causes the arc-shaped clamp to press the wire against the bottom wall of the clamping chamber. Finally, the threaded knob is tightened to limit the vertical slide rod, preventing it from easily sliding up and down, thus completing the clamping and fixing operation of the cable. The above clamping method allows the mechanism to fix and clamp cables of different sizes.

[0004] The cable layout inside a substation is quite complex. Some cables are laid on the ground, but most are laid at high altitudes. Harmonic detection of cables at high altitudes requires operators to work at heights, which poses certain safety hazards when conducting resonance detection on the substation's power system.

[0005] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0006] In view of the problems in related technologies, this utility model proposes a substation harmonic detection device to overcome the above-mentioned technical problems existing in the existing related technologies.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0008] This utility model is a substation harmonic detection device, including a support tube, a suspension clamping assembly at the top of the support tube, a detection assembly at the clamping end of the suspension clamping assembly, a drive assembly between the support tube and the suspension clamping assembly, the drive assembly being connected to the moving end of the suspension clamping assembly, a traction assembly at the bottom of the drive assembly, a rotating assembly at the bottom of the traction assembly, and the rotating assembly being located at the bottom end of the support tube.

[0009] The support tube is used to hang the suspension clamping assembly on the cable, and the rotating assembly is used to pull the traction assembly downwards so that the driving assembly drives the clamping end of the suspension clamping assembly to move upwards under the pull of the traction assembly. When the suspension clamping assembly completes the clamping and fixing of the cable, the detection end of the detection assembly comes into contact with the cable.

[0010] Furthermore, the suspension clamping assembly includes a connecting tube, which is disposed at the top end of the support tube. A suspension frame is fixedly connected to the top end of the connecting tube. A lifting tube is movably connected inside the connecting tube. The top end of the lifting tube extends into the interior of the suspension frame and is fixedly connected to a clamping block. A guide rod is fixedly connected to the bottom of the clamping block, and the guide rod is movably connected to the suspension frame.

[0011] Furthermore, the detection component includes a mounting groove, on the bottom of the inner wall of the mounting groove a current transformer is fixedly installed, a wire is provided inside the lifting tube, the top end of the wire passes through the clamping block, the wire is fixedly connected to the bottom of the current transformer, and a through hole is opened on the outer surface of the support tube, the bottom end of the wire extends to the outside of the support tube through the through hole.

[0012] Furthermore, the drive assembly includes a mounting cylinder, which is fixedly mounted on the top end of the support tube, and the bottom end of the connecting tube is fixedly mounted on the top of the mounting cylinder. A fixing plate is fixedly connected to the inner wall of the mounting cylinder, and a gear is rotatably connected to one side of the fixing plate. A toothed plate meshes with the outer surface of the gear, and the toothed plate is fixedly mounted on the outer surface of the lifting tube.

[0013] Furthermore, the traction assembly includes a winding groove, which is formed on the outer surface of the gear. A traction rope is fixedly connected to the inner wall of the winding groove. A rotating shaft is rotatably connected to one side of the fixing plate. The rotating shaft is fixedly connected to the gear. A storage cylinder is fixedly installed on the other side of the fixing plate corresponding to the rotating shaft. The rotating shaft is rotatably connected to the storage cylinder. A spiral spring is fixedly connected between the outer surface of the rotating shaft and the inner wall of the storage cylinder. A fixing rod is fixedly connected to the inner wall of both the mounting cylinder and the support tube. A guide wheel is rotatably connected to the outer surface of the fixing rod.

[0014] Furthermore, the rotating assembly includes a rotating cover, which is rotatably connected to the support tube. A screw is fixedly connected to the bottom of the inner wall of the rotating cover, and the top end of the screw extends into the interior of the support tube. A threaded tube is threadedly connected to the outer surface of the screw. The bottom end of the traction rope is fixedly connected to the top end of the threaded tube. A T-shaped limiting rod is fixedly connected to the bottom of the inner wall of the support tube, and the T-shaped limiting rod is movably connected to the threaded tube.

[0015] Furthermore, a rotating groove is provided on the outer surface of the support tube, and a rotating ring is rotatably connected inside the rotating groove. The rotating ring is fixedly connected to the rotating cover.

[0016] Furthermore, a support handle is fitted onto the outer surface of the support tube, and anti-slip grooves are provided on both the support handle and the outer surface of the rotating cover.

[0017] This utility model has the following beneficial effects:

[0018] 1. This utility model uses a support tube to suspend the suspension clamping assembly on the outer surface of the cable erected at a high position. The clamping end on the suspension clamping assembly is moved by the rotation assembly, traction assembly and drive assembly to complete the clamping and fixing of the cable. At this time, the detection end of the detection assembly is also on the outside of the cable. Since the rotation assembly is set at the bottom of the support tube, the operator only needs to complete all operations on the ground during the entire detection process. This feature can effectively ensure safety when performing harmonic detection on cables erected at high positions.

[0019] 2. This utility model drives the threaded tube by rotating the cover and screw, which in turn drives the gear to rotate via the traction rope. The rotating gear then drives the lifting tube and clamping block to rise and fall inside the suspension frame via the toothed plate, thereby clamping and fixing the cable. By setting the threaded tube and gear at both ends of the support tube and connecting them together via the traction rope, the flexible transmission characteristics of the traction rope are used to replace the traditional rigid transmission structure, avoiding complex mechanical transmission structures, reducing the number of unnecessary parts, making the overall structure of the device simpler, greatly reducing the number of parts, and achieving a lightweight design.

[0020] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the utility model embodiments, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the external outline structure of this utility model;

[0023] Figure 2 This is a cross-sectional view of the support tube of this utility model;

[0024] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0025] Figure 4 For the present utility model Figure 2 Enlarged structural diagram at point B;

[0026] Figure 5 This is a schematic diagram of the rotating component structure of this utility model;

[0027] Figure 6 This is a schematic diagram of the drive component structure of this utility model;

[0028] Figure 7 This is a schematic diagram of the gear structure of this utility model;

[0029] Figure 8 This is a schematic diagram of the suspension clamping assembly structure of this utility model.

[0030] The attached diagram lists the components represented by each number as follows:

[0031] 1. Support tube; 2. Suspension clamping assembly; 201. Connecting tube; 202. Suspension frame; 203. Lifting tube; 204. Clamping block; 205. Guide rod; 3. Detection assembly; 301. Mounting slot; 302. Current transformer; 303. Wire; 304. Through hole; 4. Drive assembly; 401. Mounting cylinder; 402. Fixing plate; 403. Gear; 404. Tooth plate; 5. Traction assembly; 501. Winding groove; 502. Traction rope; 503. Rotating shaft; 504. Storage cylinder; 505. Spiral spring; 506. Fixing rod; 507. Guide wheel; 6. Rotation assembly; 601. Rotating cover; 602. Screw; 603. Threaded tube; 604. T-shaped limit rod; 605. Rotation groove; 606. Rotation ring; 7. Support handle; 8. Anti-slip groove. Detailed Implementation

[0032] The technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the utility model.

[0033] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0034] Please see Figures 1-8 As shown, this utility model is a substation harmonic detection device, including a support tube 1, a suspension clamping assembly 2 is provided at the top of the support tube 1, a detection assembly 3 is provided at the clamping end of the suspension clamping assembly 2, a drive assembly 4 is provided between the support tube 1 and the suspension clamping assembly 2, the drive assembly 4 is connected to the moving end of the suspension clamping assembly 2, a traction assembly 5 is provided at the bottom of the drive assembly 4, a rotating assembly 6 is provided at the bottom of the traction assembly 5, and the rotating assembly 6 is located at the bottom end of the support tube 1.

[0035] The support tube 1 is used to hang the suspension clamping assembly 2 on the cable. The rotating assembly 6 is used to pull the traction assembly 5 downward, so that the driving assembly 4 drives the clamping end of the suspension clamping assembly 2 to move upward under the pull of the traction assembly 5. When the suspension clamping assembly 2 completes the clamping and fixing of the cable, the detection end of the detection assembly 3 comes into contact with the cable.

[0036] When performing harmonic detection on cables erected at high locations in a substation, the suspension clamping assembly 2 is suspended onto the outer surface of the cable via the support pipe 1. Then, the rotating assembly 6 is rotated. At this time, the rotating assembly 6 can pull the driving end of the driving assembly 4 through the traction assembly 5, thereby driving the driving end of the driving assembly 4 to rotate and causing the clamping end of the suspension clamping assembly 2 to move upward. After the suspension clamping assembly 2 has completed clamping and fixing the cable, the detection end of the detection assembly 3 is also on the outside of the cable. Then, the detection assembly 3 is connected to the harmonic detector, and the harmonics of the cable are detected by the harmonic detector and the detection assembly 3.

[0037] The suspension clamping assembly 2 can be suspended on the outer surface of the cable via the support tube 1. Then, the drive assembly 4 is driven by the rotating assembly 6 and the traction assembly 5, which causes the drive assembly 4 to move the clamping end of the suspension clamping assembly 2. After the suspension clamping assembly 2 has completed clamping and fixing the cable, the detection end of the detection assembly 3 is also on the outside of the cable. In the above configuration, when performing harmonic detection on cables at high positions, the operator only needs to use the support tube 1 to suspend the suspension clamping assembly 2 on the outer surface of the cable. At the same time, the rotating assembly 6 at the bottom of the support tube 1 can make the suspension clamping assembly 2 complete the clamping of the cable. During the entire detection process, the operator only needs to complete all operations on the ground. This feature can effectively ensure safety when performing harmonic detection on cables erected at high positions.

[0038] In one embodiment, the suspension clamping assembly 2 includes a connecting pipe 201, which is disposed at the top end of the support pipe 1. A suspension frame 202 is fixedly connected to the top end of the connecting pipe 201. A lifting pipe 203 is movably connected inside the connecting pipe 201. The top end of the lifting pipe 203 extends into the interior of the suspension frame 202 and is fixedly connected to a clamping block 204. A guide rod 205 is fixedly connected to the bottom of the clamping block 204, and the guide rod 205 is movably connected to the suspension frame 202.

[0039] After the suspension frame 202 is suspended onto the outer surface of the cable erected at a high position via the support pipe 1, the lifting pipe 203 drives the clamping block 204 to move inside the suspension frame 202. This allows the clamping block 204 to cooperate with the suspension frame 202 to clamp and fix the cable. This arrangement ensures the stability of the detection component 3 when detecting harmonics in the cable. When the clamping block 204 moves inside the suspension frame 202, it can drive the guide rod 205 to slide on the suspension frame 202. Under the guidance of the guide rod 205, the stability of the clamping block 204 during movement is ensured.

[0040] In one embodiment, the detection component 3 includes a mounting groove 301, a current transformer 302 is fixedly mounted on the bottom of the inner wall of the mounting groove 301, a wire 303 is provided inside the lifting tube 203, the top end of the wire 303 passes through the clamping block 204, the wire 303 is fixedly connected to the bottom of the current transformer 302, and a through hole 304 is provided on the outer surface of the support tube 1, the bottom end of the wire 303 extends to the outside of the support tube 1 through the through hole 304.

[0041] When the clamping block 204 moves upward, it can drive the current transformer 302 to move together. After the clamping block 204 and the suspension frame 202 have completed clamping and fixing the cable, the current transformer 302 is also on the outer surface of the cable. Then, one end of the conductor 303 is connected to the harmonic detector. The current transformer 302 is divided into a voltage transformer and a current transformer. After the voltage transformer and the current transformer are fixed on the cable in the above manner, the two current transformers 302 detect the current and voltage inside the cable and transmit the detected data to the harmonic detector through the conductor 303.

[0042] In one embodiment, the drive assembly 4 includes a mounting cylinder 401, which is fixedly mounted on the top end of the support tube 1. The bottom end of the connecting tube 201 is fixedly mounted on the top of the mounting cylinder 401. A fixing plate 402 is fixedly connected to the inner wall of the mounting cylinder 401. A gear 403 is rotatably connected to one side of the fixing plate 402. A toothed plate 404 meshes with the outer surface of the gear 403. The toothed plate 404 is fixedly mounted on the outer surface of the lifting tube 203.

[0043] When clamping and fixing the cable, the gear 403 is rotated, which causes the gear plate 404 to move upward. The moving gear plate 404 then causes the lifting tube 203 to move up and down inside the connecting tube 201. At the same time, the clamping block 204 moves up and down inside the suspension frame 202 under the action of the lifting tube 203.

[0044] In one embodiment, the traction assembly 5 includes a winding groove 501, which is formed on the outer surface of the gear 403. A traction rope 502 is fixedly connected to the inner wall of the winding groove 501. A rotating shaft 503 is rotatably connected to one side of the fixing plate 402. The rotating shaft 503 is fixedly connected to the gear 403. A storage cylinder 504 is fixedly installed on the other side of the fixing plate 402 corresponding to the rotating shaft 503. The rotating shaft 503 is rotatably connected to the storage cylinder 504. A spiral spring 505 is fixedly connected between the outer surface of the rotating shaft 503 and the inner wall of the storage cylinder 504. A fixing rod 506 is fixedly connected to the inner wall of both the mounting cylinder 401 and the support tube 1. A guide wheel 507 is rotatably connected to the outer surface of the fixing rod 506.

[0045] When the clamping block 204 needs to move upward to clamp and fix the cable, the traction rope 502 is pulled downward. Under the pull of the traction rope 502, the gear 403 drives the rotating shaft 503 to rotate on the support tube 1. At the same time, the traction rope 502 wound inside the winding groove 501 can be continuously released outward. Meanwhile, the spiral spring 505 is continuously tightened under the pull of the rotating shaft 503. At this time, the toothed plate 404 moves upward continuously under the drive of the gear 403. When it is necessary to release the clamping and fixing of the cable, the traction rope 502 is released. At this time, the spiral spring 505 begins to loosen continuously. At the same time, the rotating shaft 503 drives the gear 403 to rotate in the opposite direction under the pull of the spiral spring 505. At this time, the toothed plate 404 can move downward continuously under the drive of the gear 403. The above configuration allows for easy clamping and fixing of the cable via the clamping block 204 by simply pulling the traction rope 502 downwards. After releasing the traction rope 502, the clamping block 204 automatically resets and releases the cable clamp, making the entire operation convenient. When the traction rope 502 moves inside the support tube 1, several guide wheels 507 rotate on the fixed rod 506 under the drive of the traction rope 502. Guided and constrained by the guide wheels 507, the traction rope 502 does not come into contact with the inner wall of the mounting cylinder 401 and the support tube 1 during movement, thus preventing the traction rope 502 from breaking due to friction.

[0046] In one embodiment, the rotating assembly 6 includes a rotating cover 601, which is rotatably connected to the support tube 1. A screw 602 is fixedly connected to the bottom of the inner wall of the rotating cover 601. The top end of the screw 602 extends into the interior of the support tube 1. A threaded tube 603 is threadedly connected to the outer surface of the screw 602. The bottom end of the traction rope 502 is fixedly connected to the top end of the threaded tube 603. A T-shaped limiting rod 604 is fixedly connected to the bottom of the inner wall of the support tube 1. The T-shaped limiting rod 604 is movably connected to the threaded tube 603.

[0047] Rotating the rotating cover 601 causes the screw 602 to rotate inside the support tube 1. The screw 602 then drives the threaded tube 603, causing it to move up and down under the guidance of the T-shaped limit rod 604. When the threaded tube 603 moves downwards, it pulls the traction rope 502; when it moves upwards, the traction rope 502 automatically winds up into the winding groove 501 under the elastic force of the spiral spring 505. This design, where rotating the screw 602 pulls the traction rope 502, eliminates the need for constant pulling of the traction rope 502 after the clamping block 204 has secured the cable. This simplifies subsequent harmonic testing of the cable.

[0048] In one embodiment, for the support tube 1, a rotating groove 605 is provided on the outer surface of the support tube 1, and a rotating ring 606 is rotatably connected inside the rotating groove 605. The rotating ring 606 is fixedly connected to the rotating cover 601.

[0049] When the rotating cover 601 rotates, it can drive the rotating ring 606 to rotate inside the rotating groove 605. Under the restriction of the rotating ring 606 and the rotating groove 605, the rotating cover 601 is not easy to detach from the support tube 1.

[0050] In one embodiment, for the support tube 1, a support handle 7 is provided on the outer surface of the support tube 1, and anti-slip grooves 8 are provided on the outer surfaces of both the support handle 7 and the rotating cover 601.

[0051] The support handle 7 can be used to lift the support tube 1, and the anti-slip groove 8 on the surface of the support handle 7 makes it less likely for the hand to slip when lifting the support tube 1.

[0052] Through the above technical solution, 1. The suspension clamping assembly 2 can be suspended to the outer surface of the cable erected at a high position via the support tube 1. The clamping end on the suspension clamping assembly 2 is moved by the rotating assembly 6, the traction assembly 5, and the driving assembly 4 to complete the clamping and fixing of the cable. At this time, the detection end of the detection assembly 3 is also on the outside of the cable. Since the rotating assembly 6 is located at the bottom of the support tube 1, the operator only needs to complete all operations on the ground during the entire detection process. This feature ensures safety when performing harmonic detection on cables erected at high positions; 2. The threaded tube 603 can be driven by the rotating cover 601 and the screw 602, thereby making the threaded tube 603... 03 The traction rope 502 can drive the gear 403 to rotate. The rotating gear 403, through the toothed plate 404, drives the lifting tube 203 and the clamping block 204 to rise and fall inside the suspension frame 202, thereby completing the clamping and fixing of the cable. By setting the threaded tube 603 and the gear 403 at both ends of the support tube 1, and connecting the threaded tube 603 and the gear 403 together through the traction rope 502, the flexible transmission characteristics of the traction rope 502 are used to replace the traditional rigid transmission structure, avoiding complex mechanical transmission structure, reducing the number of unnecessary parts, making the structure of the entire device simpler, greatly reducing the number of parts, and realizing the lightweight design of the device.

[0053] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0054] The preferred embodiments of the utility model disclosed above are merely illustrative of the utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the utility model, thereby enabling those skilled in the art to better understand and utilize it. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A device for detecting harmonics in a substation, comprising a support tube (1), characterised in that, The top of the supporting pipe (1) is provided with a hanging clamping assembly (2), the clamping end of the hanging clamping assembly (2) is provided with a detection assembly (3), the supporting pipe (1) and the hanging clamping assembly (2) are provided with a driving assembly (4), the driving assembly (4) is connected with the moving end of the hanging clamping assembly (2), the bottom of the driving assembly (4) is provided with a traction assembly (5), the bottom of the traction assembly (5) is provided with a rotating assembly (6), and the rotating assembly (6) is arranged at the bottom end of the supporting pipe (1). The supporting pipe (1) is used for hanging the hanging clamping assembly (2) on the cable, the rotating assembly (6) is used for pulling the traction assembly (5) downward, so that the driving assembly (4) drives the clamping end of the hanging clamping assembly (2) to move upward under the pulling of the traction assembly (5), and when the hanging clamping assembly (2) completes the clamping and fixing of the cable, the detection end of the detection assembly (3) is in contact with the cable.

2. A substation harmonic detection device according to claim 1, characterised in that, The hanging clamping assembly (2) comprises a connecting pipe (201), the connecting pipe (201) is arranged at the top end of the supporting pipe (1), the top end of the connecting pipe (201) is fixedly connected with a hanging frame (202), the inside of the connecting pipe (201) is movably connected with a lifting pipe (203), the top end of the lifting pipe (203) extends to the inside of the hanging frame (202) and is fixedly connected with a clamping block (204), the bottom of the clamping block (204) is fixedly connected with a guide rod (205), and the guide rod (205) is movably connected with the hanging frame (202).

3. A substation harmonic detection apparatus according to claim 2, characterised in that, The detection assembly (3) comprises a mounting groove (301), a mutual inductor (302) is fixedly installed on the inner wall bottom of the mounting groove (301), a wire (303) is arranged in the inside of the lifting pipe (203), the top end of the wire (303) penetrates through the clamping block (204), the wire (303) is fixedly connected with the bottom of the mutual inductor (302), and a through hole (304) is formed in the outer surface of the supporting pipe (1), and the bottom end of the wire (303) extends to the outside of the supporting pipe (1) through the through hole (304).

4. A substation harmonic detection apparatus according to claim 3, characterised in that, The driving assembly (4) comprises a mounting cylinder (401), the mounting cylinder (401) is fixedly installed at the top end of the supporting pipe (1), the bottom end of the connecting pipe (201) is fixedly installed at the top of the mounting cylinder (401), the inner wall of the mounting cylinder (401) is fixedly connected with a fixed plate (402), one side of the fixed plate (402) is rotatably connected with a gear (403), the outer surface of the gear (403) is meshed with a toothed plate (404), and the toothed plate (404) is fixedly installed on the outer surface of the lifting pipe (203).

5. A substation harmonic detection apparatus according to claim 4, characterised in that, The traction assembly (5) includes a winding groove (501) which is opened on the outer surface of the gear (403), the inner wall of the winding groove (501) is fixedly connected with the traction rope (502), one side of the fixed plate (402) is rotatably connected with the rotating shaft (503), the rotating shaft (503) is fixedly connected with the gear (403), the other side of the fixed plate (402) is fixedly installed with the receiving cylinder (504) corresponding to the rotating shaft (503), the rotating shaft (503) is rotatably connected with the receiving cylinder (504), the outer surface of the rotating shaft (503) and the inner wall of the receiving cylinder (504) are fixedly connected with the volute spring (505), the inner wall of the mounting cylinder (401) and the supporting pipe (1) are fixedly connected with the fixed rod (506), and the outer surface of the fixed rod (506) is rotatably connected with the guide wheel (507).

6. A substation harmonic detection apparatus according to claim 5, characterised in that, The rotating assembly (6) includes a rotating cover (601), the rotating cover (601) is rotatably connected with the supporting pipe (1), the inner wall bottom of the rotating cover (601) is fixedly connected with the screw rod (602), the top end of the screw rod (602) extends to the inside of the supporting pipe (1), the outer surface of the screw rod (602) is threadedly connected with the threaded pipe (603), the bottom end of the traction rope (502) and the top end of the threaded pipe (603) are fixedly connected together, the inner wall bottom of the supporting pipe (1) is fixedly connected with the T-shaped limiting rod (604), and the T-shaped limiting rod (604) is movably connected with the threaded pipe (603).

7. A substation harmonic detection apparatus according to claim 6, characterised in that, The outer surface of the supporting pipe (1) is provided with a rotating groove (605), and the rotating ring (606) is rotatably connected in the rotating groove (605).

8. A substation harmonic detection apparatus according to claim 7, characterised in that, The outer surface of the supporting pipe (1) is provided with a supporting handle (7), and the outer surface of the supporting handle (7) and the rotating cover (601) are provided with anti-skid grooves (8).

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