Drone-based power inspection device for transmission lines

Abstract

To provide a power transmission line power inspection device using a drone that improves the stability of the drone, facilitates voltage detection on a quarter-split power transmission line, and ensures close contact between the voltage detector and the power transmission line. [Solution] In a power line power inspection device using a drone (101), the telescopic mechanism (100) includes the drone, a head frame (102) mounted on the drone, a telescopic section (threaded sleeve (103a), threaded tube (103b), and telescopic limiting groove) mounted on the head frame, a limiting section (limiting sleeve (104a) and limiting protrusion) mounted on the head frame, and a power motor (105a) mounted on the head frame. The voltage detection mechanism (200) detects voltages on two conductors located at the bottom of a quadrant power line. The threaded tube is located at the bottom of the drone to prevent the drone from becoming top-heavy and improve stability. The voltage detection hook (202a) and support base (203b) prevent poor contact and improve the effectiveness of the voltage detection work.

Description

Technical Field

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[0001] The present invention belongs to the technical field related to the power inspection of transmission lines, and particularly relates to a power inspection device for transmission lines by drones.

Background Art

[0002] In the inspection work of overhead transmission lines, first, power inspection (energization test) needs to be carried out to ensure the safety of workers. In the conventional power inspection method, workers climb the utility pole, use a telescopic contact type voltage detector to perform power inspection on the transmission line while maintaining a safe distance, and after confirming that there is no voltage, the grounding wire is attached.

Summary of the Invention

Problems to be Solved by the Invention

[0003] However, with the development of the economy, the daily power outage inspections and emergency responses of transmission line operation and inspection workers have increased, and the frequency of work has increased. In this context, the conventional power inspection process of climbing utility poles has the problem of high work risk.

[0004] Currently, in some operations, drones (unmanned aerial vehicles) are used for power inspection. In many cases, a telescopic voltage detector is vertically attached to the drone. In this method, it is difficult to perform power inspection on the lower two wires of the four - split transmission line. There is also a method of attaching the telescopic voltage detector horizontally. In this case, the worker needs to extend the voltage detector in advance and then fly the drone. This not only makes the operation complicated, but also has the problem that the center of gravity of the drone becomes unstable and it is in a "top - heavy" state. Furthermore, in the current power inspection of transmission lines using drones, it cannot be ensured that the voltage detector adheres closely to the transmission line, which affects the power inspection effect.

[0005] Therefore, in order to solve the problems in the current power inspection device for power transmission lines using drones as described above, the present invention is disclosed. The present invention aims to disclose a power inspection device for power transmission lines using a drone, with the aim of improving the stability of the drone, facilitating voltage detection in four-section power transmission lines, and ensuring close contact between the voltage detector and the power transmission line. [Means for solving the problem]

[0006] To achieve the above objective, the present invention employs the following technical techniques. The present invention includes a telescopic mechanism (100), a voltage detection mechanism (200), and an interlocking mechanism (300), wherein the telescopic mechanism (100) includes a drone (101), a head frame (102) installed on the drone (101), a telescopic part (103) installed on the head frame (102), a limiting part (104) installed on the head frame (102), and a power unit (105) installed on the head frame (102), and the voltage detection mechanism (200) includes the telescopic part ( The present invention discloses a power transmission line power inspection device using a drone, which includes a first sliding part (201) installed on 103), an energization inspection part (202) installed on the first sliding part (201), and a support part (203) installed on the telescopic part (103), and the interlocking mechanism (300) includes a balance part (301) installed on the drone (101), a second sliding part (302) installed on the telescopic part (103), and a return part (303) installed on the telescopic part (103).

[0007] Preferably, the expandable portion (103) includes a threaded sleeve (103a) installed on the head frame (102), a threaded tube (103b) attached to the threaded sleeve (103a), and an expansion / contraction limiting groove (103c) installed on the threaded tube (103b).

[0008] Preferably, the limiting portion (104) includes a limiting sleeve (104a) installed on the threaded tube (103b) and connected to the head frame (102), and a limiting projection (104b) installed on the limiting sleeve (104a) and conforming to the expansion / contraction limiting groove (103c).

[0009] Preferably, the power unit (105) includes a power motor (105a) installed on the head frame (102), an input gear (105b) installed on the power motor (105a), an output gear (105c) installed on the threaded sleeve (103a) and meshing with the input gear (105b), and an airflow board (105d) installed on the head frame (102).

[0010] Preferably, the first sliding portion (201) includes a first slip ring (201a) installed on the threaded tube (103b), a first slider (201b) installed on the first slip ring (201a), a first sliding plate (201c) installed on the first slider (201b) and fitting into the threaded tube (103b), and a first through slot (201d) installed on the threaded tube (103b) and fitting into the first slider (201b).

[0011] Preferably, the energization inspection unit (202) includes a voltage detection hook (202a) installed on the first slip ring (201a), a voltage detector (202b) installed on the voltage detection hook (202a), and a voltage detection spring (202c) installed on the voltage detector (202b) and connected to the voltage detection hook (202a).

[0012] Preferably, the support portion (203) includes a support frame (203a) installed on the threaded tube (103b), a support base (203b) installed on the support frame (203a), a support groove (203c) installed on the support base (203b), and a support slide groove (203d) installed on the voltage detection hook (202a) and connected to the support base (203b).

[0013] Preferably, the balance section (301) includes a balance frame (301a) installed on the drone (101) and a balance slide sleeve (301b) installed on the balance frame (301a) and fitted to the threaded tube (103b).

[0014] Preferably, the second sliding portion (302) includes a second slip ring (302a) installed on the threaded tube (103b), a second slider (302b) installed on the second slip ring (302a), a second sliding plate (302c) installed on the second slider (302b) and fitting into the threaded tube (103b), a second through slot (302d) installed on the threaded tube (103b) and fitting into the second slider (302b), and an interlocking rope (302e) connecting the second sliding plate (302c) and the first sliding plate (201c).

[0015] Preferably, the return portion (303) includes a return ring (303a) installed on the threaded tube (103b) and a return spring (303b) installed between the return ring (303a) and the second slip ring (302a). [Effects of the Invention]

[0016] The present invention offers the following beneficial effects. In this invention, since the threaded tube is installed horizontally on the bottom of the drone, the voltage detector can detect voltage in two conductors located at the bottom of the four-way power transmission line, improving the applicability of the device. Placing the threaded tube on the bottom of the drone prevents the drone from becoming "top-heavy," thereby increasing the drone's stability. Furthermore, by providing a voltage detection hook and a support base, the conductors can be fixed by the voltage detection hook and support base when the device performs voltage detection, ensuring stability during voltage detection by the voltage detector, preventing contact failures, and improving the voltage detection effectiveness of the device.

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings necessary for use in the embodiments are briefly introduced below, but it should be understood that the following drawings only show some embodiments of the present invention. Those skilled in the art can obtain other relevant drawings based on these drawings without any creative effort. [Brief explanation of the drawing]

[0018] [Figure 1] This is a schematic diagram of the overall structure of a power transmission line power inspection device using a drone according to the present invention. [Figure 2] This is a side view of a power transmission line power inspection device using a drone according to the present invention. [Figure 3] This is a schematic diagram of the structure of the extendable section of a power transmission line power inspection device using a drone according to the present invention. [Figure 4] This is a schematic diagram of the structure of the second sliding part of the power transmission line power inspection device using a drone according to the present invention. [Figure 5] This is a schematic diagram of the power unit structure of the power transmission line power inspection device using a drone according to the present invention. [Figure 6] This is a schematic diagram of the structure of the energization inspection section of the power transmission line power inspection device using a drone according to the present invention. [Figure 7] This is a schematic diagram of the structure of the limiting section of a power transmission line power inspection device using a drone according to the present invention.

Best Mode for Carrying Out the Invention

[0019] In order to more clearly and easily understand the above objects, features, and advantages of the present invention, specific embodiments of the present invention will be described in detail below with reference to the drawings.

[0020] In the following description, many specific details are described in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Those skilled in the art in the technical field of the present invention can make similar applications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0021] Next, as used in this specification, "one embodiment" or "an embodiment" refers to specific features, structures, or characteristics included in at least one implementation method of the present invention. The expression "in one embodiment" used in different parts of this specification does not refer to the same embodiment, nor does it mean exclusive of other embodiments.

[0022] Furthermore, the present invention is described in detail using schematic diagrams. When explaining the embodiments of the present invention in detail, for the sake of easy explanation, the cross-sectional views showing the instrument structure may be partially enlarged and may not follow the general scale. Also, the schematic diagrams are merely illustrative and do not limit the protection scope of the present invention. In actual production, three-dimensional spatial dimensions including length, width, and depth are included.

[0023] (First Embodiment) Referring to FIGS. 1 to 4, a first embodiment of the present invention will be described. The power line power inspection device using a drone according to the first embodiment includes a telescopic mechanism 100, a power inspection mechanism 200, and an interlocking mechanism 300.

[0024] The telescopic mechanism 100 includes a drone 101, a head frame 102 installed on the drone 101, a telescopic section 103 installed on the head frame 102, a limiting section 104 installed on the head frame 102, and a power unit 105 installed on the head frame 102.

[0025] The voltage detection mechanism 200 includes a first sliding part 201 installed on the telescopic part 103, an energization inspection part 202 installed on the first sliding part 201, and a support part 203 installed on the telescopic part 103.

[0026] The interlocking mechanism 300 includes a balance unit 301 installed on the drone 101, a second sliding unit 302 installed on the telescopic unit 103, and a return unit 303 installed on the telescopic unit 103.

[0027] When in use, the drone 101 is activated and brought close to the power line. With extension and retraction restricted by the limiting part 104, the power unit 105 is driven to move the telescopic part 103, and the telescopic part 103 drives the first sliding part 201, extending the power inspection part 202. Next, the drone 101 is controlled to sandwich the power line between the energization inspection unit 202 and the support unit 203. The power unit 105 is then activated to move the telescopic unit 103, causing the head frame 102 to compress and contract the second sliding unit 302. The second sliding unit 302 pulls the first sliding unit 201, bringing the energization inspection unit 202 closer to the support unit 203. This fixes the power line between the energization inspection unit 202 and the support unit 203, while simultaneously performing an energization test on the power line. The power unit 105 is then activated in the reverse direction to open the energization inspection unit 202, allowing a similar energization test to be performed on another power line.

[0028] (Second example) A second embodiment of the present invention will be described with reference to Figures 1, 2, 3, and 7. In the second embodiment, unlike the first embodiment, the telescopic portion 103 includes a threaded sleeve 103a installed on the head frame 102, a threaded tube 103b attached to the threaded sleeve 103a, and a telescopic limiting groove 103c installed on the threaded tube 103b.

[0029] Preferably, the threaded sleeve 103a is rotatably mounted on the head frame 102, the threaded tube 103b is screw-connected to the threaded sleeve 103a, and the expansion / contraction limiting groove 103c is installed on the outer surface of the threaded tube 103b.

[0030] Furthermore, the tubular design of the threaded tube 103b reduces the overall weight of the device and increases the flight time of the drone 101. In addition, the tubular space of the threaded tube 103b provides space for the connection between the first sliding part 201 and the second sliding part 302, ensuring the normal operation of the device. Moreover, the expansion and contraction limiting groove 103c is a blind groove design, which improves the structural strength of the threaded tube 103b and enhances the durability of the device.

[0031] Furthermore, the threaded tube 103b is installed horizontally. If the threaded tube 103b were installed vertically, it would only be able to perform voltage detection on single or double wires, resulting in low adaptability. Also, due to the complex polygonal three-dimensional structure of power lines, a vertically installed voltage detector would only be able to perform voltage detection on the uppermost power line for power lines divided into four, six, and eight sections. In this case, when attempting to perform voltage detection on the lower power lines, the uppermost power line would block the voltage detector, making it impossible to perform voltage detection on the lower power lines. Moreover, since the drone 101 requires a certain safety distance, many drones 101 are equipped with extension rods. If these extension rods are long and installed vertically on the drone 101, the area of ​​the extension rod affected by strong winds at high altitudes would increase, reducing the stability of the drone 101. This would not only make voltage detection unstable but also potentially cause safety accidents such as the drone coming into contact with the wiring.

[0032] Furthermore, the threaded tube 103b is positioned directly beneath the drone 101. This direct-below design ensures that the entire device is relatively balanced and stable during takeoff and when approaching power lines. If the threaded tube 103b were installed at the end of the drone 101, the drone 101 would become "top-heavy," making takeoff difficult, and once at high altitude, unstable winds would cause the drone 101 to sway from side to side, making it easy to bump or drop.

[0033] The limiting portion 104 includes a limiting sleeve 104a installed on the threaded tube 103b and connected to the head frame 102, and a limiting projection 104b installed on the limiting sleeve 104a and conforming to the expansion / contraction limiting groove 103c.

[0034] Preferably, the limiting sleeve 104a is fixed to the head frame 102 and slidably connected to the threaded tube 103b. The limiting projection 104b is slidably connected to the expansion / contraction limiting groove 103c, thereby limiting the threaded tube 103b and preventing it from rotating. This allows the threaded tube 103b to expand and contract by the rotation of the threaded sleeve 103a, ensuring the normal operation of the device.

[0035] The power unit 105 includes a power motor 105a mounted on the head frame 102, an input gear 105b attached to the power motor 105a, an output gear 105c mounted on a threaded sleeve 103a and meshing with the input gear 105b, and an airflow board 105d mounted on the head frame 102.

[0036] Preferably, the power motor 105a is a servo motor, mounted on the head frame 102, and provides the power necessary for the extension and retraction of the threaded tube 103b. The input gear 105b and output gear 105c mesh together, causing the power motor 105a to rotate the threaded sleeve 103a, ensuring the normal operation of the device. The rest of the structure is the same as in the first embodiment.

[0037] (Third embodiment) A third embodiment will be described with reference to Figures 1 to 6. In contrast to the second embodiment, the third embodiment of the present invention includes a first slip ring 201a installed on the threaded tube 103b, a first slider 201b installed on the first slip ring 201a, a first sliding plate 201c installed on the first slider 201b and fitting into the threaded tube 103b, and a first through slot 201d installed on the threaded tube 103b and fitting into the first slider 201b.

[0038] Preferably, the first slip ring 201a is slidably mounted on the threaded tube 103b. The first slider 201b is slidably connected to the first through slot 201d to ensure the stability of the voltage detection hook 202a and prevent the voltage detection hook 202a from bending. The first sliding plate 201c is used to improve the sliding stability of the first slip ring 201a and to connect to the second sliding part 302. By providing the first through slot 201d, rotation of the first slip ring 201a can be prevented and movement of the first slip ring 201a can be ensured.

[0039] The energization inspection unit 202 includes a voltage detection hook 202a installed on the first slip ring 201a, a voltage detector 202b installed on the voltage detection hook 202a, and a voltage detection spring 202c installed on the voltage detector 202b and connected to the voltage detection hook 202a.

[0040] Preferably, the voltage detection hook 202a is for securing the power line and is used to grasp the power line so that the drone 101 can perform voltage detection work even under unstable wind conditions. The voltage detector 202b is used to make contact with the power line and perform voltage detection work. The voltage detector 202b is slidably mounted on the voltage detection hook 202a and, when the voltage detection hook 202a clamps the power line, the installation of the voltage detection spring 202c not only ensures that the voltage detector 202b is securely in contact with the power line but also prevents the voltage detection hook 202a from strongly compressing and damaging the voltage detector 202b.

[0041] The support section 203 includes a support frame 203a installed on the threaded tube 103b, a support base 203b installed on the support frame 203a, a support groove 203c installed on the support base 203b, and a support slide groove 203d installed on the voltage detection hook 202a and connected to the support base 203b.

[0042] Preferably, the support frame 203a is an L-shaped bracket fixed to the threaded tube 103b, and the normal operation of the device is ensured by the movement of the threaded tube 103b, which also moves the voltage detection hook 202a and the support base 203b. The support base 203b fits onto the voltage detection hook 202a and is used to fix the power transmission line, and the support groove 203c is provided with a rubber pad to reduce damage to the transmission line. The support base 203b is slidably mounted on the support slide groove 203d to enhance the sliding stability of the voltage detection hook 202a.

[0043] The balance unit 301 includes a balance frame 301a installed on the drone 101 and a balance slide sleeve 301b installed on the balance frame 301a and fitted to the threaded tube 103b.

[0044] Preferably, the balance frame 301a is installed on the tail of the drone 101, and the installation of the balance frame 301a and the head frame 102 functions to extend, extending the retractable distance of the threaded tube 103b, thereby increasing the safe distance for voltage detection work.

[0045] Preferably, the balance slide sleeve 301b is fixedly positioned on the balance frame 301a and slidably connected to the threaded tube 103b, supporting the threaded tube 103b, reducing the force on the threaded sleeve 103a, and improving the durability of the device.

[0046] The second sliding portion 302 includes a second slip ring 302a installed on the threaded tube 103b, a second slider 302b installed on the second slip ring 302a, a second sliding plate 302c installed on the second slider 302b and fitting to the threaded tube 103b, a second through slot 302d installed on the threaded tube 103b and fitting to the second slider 302b, and an interlocking rope 302e installed between the second sliding plate 302c and the first sliding plate 201c.

[0047] Preferably, the second slip ring 302a is slidably mounted on the threaded tube 103b. The second slider 302b is slidably connected to the second through slot 302d and is used to install the second sliding plate 302c. The second sliding plate 302c is used to improve the sliding stability of the second slip ring 302a and at the same time to connect the interlocking rope 302e. The interlocking rope 302e connects the first sliding plate 201c and the second sliding plate 302c, and the movement of the second sliding plate 302c drives the first sliding plate 201c, causing the voltage detection hook 202a to move. As a result, when the power line is clamped in the voltage detection hook 202a, the power line and the drone 101 can be stably connected simply by activating the power motor 105a, making operation easy.

[0048] The return section 303 includes a return ring 303a provided on the threaded tube 103b, and a return spring 303b provided between the return ring 303a and the second slip ring 302a.

[0049] Preferably, the return ring 303a is fixed to the threaded tube 103b and used to install the return spring 303b. The return spring 303b provides power for the return of the second slip ring 302a, ensuring the normal operation of the device. Other configurations of the third embodiment are the same as those of the second embodiment.

[0050] When in use, the drone 101 is activated and brought close to the power line. The power motor 105a is activated to move the threaded tube 103b and extend the voltage detection distance. The drone 101 is controlled to clamp the power line between the voltage detection hook 202a and the support base 203b. The power motor 105a is activated again to move the threaded tube 103b. At this time, the threaded tube 103b moves the second slip ring 302a toward the head frame 102. The second slip ring 302a moves the second slider 302b along the second through slot 302d while compressing the return spring 303b. The second slider 302b moves the second sliding plate 302c, and the interlocking rope 302e pulls the first sliding plate 201c, causing the first slider 201b to move along the first through slot 201d. This series of actions causes the first slip ring 201a to bring the voltage detection hook 202a closer to the support base 203b, causing the voltage detection hook 202a to grip the power line and the voltage detector 202b to make close contact with the power line. The elasticity of the voltage detection spring 202c ensures that the voltage detector 202b makes secure contact with the power line. Once the voltage detection work is complete, the power motor 105a can be started in the reverse direction to open the voltage detection hook 202a and move away from the power line.

[0051] It should be noted that the structures and arrangements shown in the various exemplary embodiments herein are for illustrative purposes only. Although only a few embodiments are described in detail here, readers of this specification will readily understand that many modifications are possible without essentially departing from the novel teachings and merits of the subject matter described herein (e.g., changes in the dimensions, size, structure, shape and proportions of various elements, as well as parameter values ​​(temperature, pressure, etc.), installation arrangement, use of materials, color, orientation, etc.). For example, what is shown as an integrally molded element as a whole can be composed of multiple parts or elements, and the positions of the elements can be reversed or otherwise modified. It is also possible to change or alter the properties, number, or position of individual elements. Therefore, all such modifications are intended to fall within the scope of the invention. Based on alternative embodiments, the order or arrangement of steps in any process or method can be changed or rearranged. In the claims, any “device having a function” is intended to encompass structures that perform the function described herein, including not only their structural equivalents but also equivalent structures. Without departing from the scope of the present invention, other substitutions, modifications, changes, and omissions may be made in the design, operating conditions, and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to any particular embodiment, but extends to a wide range of modifications included within the scope of the appended claims. Furthermore, in order to provide a concise description of the exemplary embodiments, not all features of the actual embodiments (i.e., features not relevant to the best embodiment of the present invention currently considered, or features not relevant to the realization of the invention) may be omitted.

[0052] The above embodiments are for illustrative purposes only and do not limit the invention. Although the invention has been described in detail based on the above embodiments, a person ordinary in the art can modify or substitute equivalents for specific embodiments of the invention. As long as these modifications or equivalent substitutions do not depart from the spirit and scope of the invention, they are included within the scope of protection of the claims of the invention as pending. [Explanation of symbols]

[0053] 100 Telescopic mechanism 101 Drones 102 Head Frame 103 Telescopic part 103a Screw-on sleeve 103b Threaded Tube 103c Expansion limiting groove 104 Restriction section 104a Restricted Sleeves 104b Restrictive projection 105 Power section 105a Power Motor 105b Input Gear 105c power gear 105d Airflow Board 200 Voltage detection mechanism 201 First sliding part 201a First slip ring 201b First Slider 201c First sliding plate 201d First Through Slot 202 Power Testing Department 202a Voltage detection hook 202b Voltage detector 202c Voltage Detector Spring 203 Support part 203a Support frame 203b Support stand 203c Support groove 203d Support slide groove 300 Interlocking mechanism 301 Balance Unit 301a Balance Frame 301b Balance Slide Sleeve 302 Second sliding part 302a Second slip ring 302b Second Slider 302c Second sliding plate 302d Second Through Slot 302e Interlocking Rope 303 Return device 303a Return Ring 303b Return Spring

Claims

1. It includes an extension mechanism (100), a voltage detection mechanism (200), and an interlocking mechanism (300), The telescopic mechanism (100) includes a drone (101), a head frame (102) installed on the drone (101), a telescopic part (103) installed on the head frame (102), a limiting part (104) installed on the head frame (102), and a power unit (105) installed on the head frame (102). The voltage detection mechanism (200) includes a first sliding part (201) installed on the telescopic part (103), an energization inspection part (202) installed on the first sliding part (201), and a support part (203) installed on the telescopic part (103), The interlocking mechanism (300) includes a balance part (301) installed on the drone (101), a second sliding part (302) installed on the telescopic part (103), and a return part (303) installed on the telescopic part (103), The telescopic portion (103) includes a threaded sleeve (103a) installed on the head frame (102), a threaded tube (103b) attached to the threaded sleeve (103a), and a telescopic limiting groove (103c) installed on the threaded tube (103b). The threaded tube 103b is positioned horizontally directly below the drone 101. A power transmission line power inspection device using a drone, characterized by the following features.

2. The power transmission line power inspection device using a drone according to claim 1, wherein the limiting portion (104) includes a limiting sleeve (104a) installed on the threaded tube (103b) and connected to the head frame (102), and a limiting projection (104b) installed on the limiting sleeve (104a) and conforming to the expansion / contraction limiting groove (103c).

3. The power unit (105) includes a power motor (105a) installed on the head frame (102), an input gear (105b) installed on the power motor (105a), an output gear (105c) installed on the threaded sleeve (103a) and meshing with the input gear (105b), and an airflow board (105d) installed on the head frame (102), as described in claim 2, for power transmission line power inspection device using a drone.

4. The power transmission line power inspection device using a drone according to claim 3, wherein the first sliding portion (201) includes a first slip ring (201a) installed on the threaded tube (103b), a first slider (201b) installed on the first slip ring (201a), a first sliding plate (201c) installed on the first slider (201b) and fitting to the threaded tube (103b), and a first through slot (201d) installed on the threaded tube (103b) and fitting to the first slider (201b).

5. The power transmission line power inspection device using a drone according to claim 4, wherein the current inspection unit (202) includes a voltage detection hook (202a) installed on the first slip ring (201a), a voltage detector (202b) installed on the voltage detection hook (202a), and a voltage detection spring (202c) installed on the voltage detector (202b) and connected to the voltage detection hook (202a).

6. The power transmission line power inspection device using a drone according to claim 5, wherein the support portion (203) includes a support frame (203a) installed on the threaded tube (103b), a support base (203b) installed on the support frame (203a), a support groove (203c) installed on the support base (203b), and a support slide groove (203d) installed on the voltage detection hook (202a) and connected to the support base (203b).

7. The power transmission line power inspection device using a drone according to claim 6, wherein the balance section (301) includes a balance frame (301a) installed on the drone (101) and a balance slide sleeve (301b) installed on the balance frame (301a) and fitted to the threaded tube (103b).

8. The power transmission line power inspection device using a drone according to claim 7, wherein the second sliding portion (302) includes a second slip ring (302a) installed on the threaded tube (103b), a second slider (302b) installed on the second slip ring (302a), a second sliding plate (302c) installed on the second slider (302b) and fitting to the threaded tube (103b), a second through slot (302d) installed on the threaded tube (103b) and fitting to the second slider (302b), and an interlocking rope (302e) connecting the second sliding plate (302c) and the first sliding plate (201c).

9. The power transmission line power inspection device using a drone according to claim 8, wherein the return section (303) includes a return ring (303a) installed on the threaded tube (103b) and a return spring (303b) installed between the return ring (303a) and the second slip ring (302a).

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