Electric leakage detection device for power transmission line

Abstract

The utility model relates to the technical field of power grid detection, in particular to an electric leakage detection device for a power transmission line, which comprises a base, vertical plates are symmetrically mounted at the two ends of the top of the base, and according to the electric leakage detection device for the power transmission line, when a movable plate moves, supporting columns inside the movable plate are extruded to move through multiple groups of external chutes; the supporting columns move to synchronously drive the sliding blocks to move outside the sliding rods, so that the distance between the multiple sets of bases can be conveniently adjusted to be suitable for lines with different distances, the multiple sets of lines can be conveniently detected at the same time, the telescopic rods and the reset springs can be synchronously compressed by pressing the limiting plates downwards, the power transmission line can be conveniently placed below the two sets of movable rollers, and the detection efficiency is improved. When the device moves, the movable roller synchronously rolls along the power transmission line, the electric leakage detector can detect the line conveniently, the limiting plate is released to reset after the line is installed at the bottom of the movable roller, the device is prevented from falling off from the line, and operation is convenient.

Description

Technical Field

[0001] This application relates to the technical field of power grid detection, and in particular to a leakage current detection device for transmission lines. Background Technology

[0002] When using utility poles to erect power lines for high-altitude power transmission, power lines in remote areas are often damaged due to factors such as tree branches, wind erosion, hail, etc. Damage to the outer sheath can easily lead to leakage. High-voltage arcs are often generated at the damaged sheath, resulting in discharge and causing huge power loss. Therefore, leakage current detection devices are needed for detection.

[0003] A Chinese patent website discloses a power transmission line fracture and leakage detection device, publication number CN217305248U. The device includes a detection unit, a support frame fixedly connected to one side of the detection unit, a roller rotatably connected inside the support frame, a support plate fixedly connected to the side of the detection unit near the support frame, a guide rod fixedly connected inside the support plate, and a movable plate slidably connected to the outer surface of the guide rod. The advantages of this invention are: through the coordinated arrangement of the detection unit, support frame, roller, support plate, guide rod, movable plate, spring, and baffle, the detection unit is pushed to detect the fault. The roller rolls on the outer surface of the power transmission line, and the detection unit hangs on the power transmission line, preventing damage from falls from heights. The handle length can be adjusted through the coordinated arrangement of the support base, rotating block, connecting rod, first lead screw, handle, second lead screw, knob, and locking block.

[0004] The solution also has the following problems: when testing transmission lines, only one line can be tested at a time, and multiple lines cannot be tested simultaneously, resulting in low testing efficiency and certain drawbacks.

[0005] Therefore, in order to solve the above problems, this application provides a leakage current detection device for power transmission lines. Utility Model Content

[0006] The purpose of this invention is to provide a leakage current detection device for power transmission lines to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a leakage current detection device for power transmission lines, comprising a base, upright plates symmetrically mounted at both ends of the top of the base, a sliding rod mounted between the outer sides of the upright plates, a plurality of sliders evenly spaced on the outside of the sliding rods, a movable plate provided on the top of the upright plates and the sliders, a plurality of inclined grooves opened on the top of the movable plate, a support column mounted on the top of the sliders and inside the inclined grooves, a base mounted on the top of the support column, a leakage current detector mounted on the top of the base, a support frame mounted on one end of the top of the base, and a movable roller mounted on the inner side wall of the support frame.

[0008] Preferably, a fixing plate is installed at the top of the base along a longer edge, a threaded rod is installed on the fixing plate, a connecting plate is installed at one bottom end of the movable plate, one end of the threaded rod is rotatably connected to the connecting plate, and a throttle handle is installed at the end of the threaded rod away from the connecting plate after passing through the fixing plate.

[0009] Preferably, the outer ring surface of the slide bar is slidably connected to the interior of the multiple sets of sliders, and the bottom of the slider is in contact with the top of the base.

[0010] Preferably, the inclined grooves have different inclination angles, and the support columns slide synchronously inside the inclined grooves when the movable plate moves on top of the two vertical plates.

[0011] Preferably, a support plate is installed at one outer end of the base, a telescopic rod is installed on the top of the support plate, a return spring is installed on the outer ring surface of the telescopic rod, a limit plate is installed on the top of the telescopic rod, and the limit plate does not interfere with the movable roller.

[0012] Preferably, limit posts are symmetrically installed at both ends of the bottom of the limiting plate, and one end of the bottom of the limiting post penetrates through the support plate and extends below its bottom.

[0013] Preferably, a traction block is installed on the outer end of the base away from the fixed plate.

[0014] In summary, this application includes the following beneficial technical effects:

[0015] This is a leakage current detection device for power transmission lines. When the movable plate moves, it compresses the internal support columns through multiple sets of external inclined grooves. The movement of the support columns synchronously drives the slider to move outside the slide rod, thus facilitating the adjustment of the spacing of multiple bases to suit lines with different spacings. This allows for simultaneous detection of multiple lines. By pressing down the limiting plate, the telescopic rod and the return spring are simultaneously compressed, making it easy to place the power transmission line under the two sets of movable rollers. When the device moves, the movable rollers roll synchronously along the power transmission line, facilitating the leakage current detector to detect the line. Furthermore, when the line is installed at the bottom of the movable rollers, releasing the limiting plate allows for reset, preventing the device from falling off the line. This makes the operation convenient. Attached Figure Description

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

[0017] Figure 2 This is a utility model Figure 1 Left side structural diagram;

[0018] Figure 3 This is a utility model Figure 2 Overall structural layered diagram;

[0019] Figure 4 This is a utility model Figure 3 Partial structural diagram.

[0020] Explanation of reference numerals in the attached drawings: 1. Base; 2. Vertical plate; 3. Slide rod; 4. Slider; 5. Movable plate; 501. Inclined groove; 6. Support column; 7. Base; 8. Leakage detector; 9. Support frame; 10. Movable roller; 11. Fixed plate; 12. Threaded rod; 13. Connecting plate; 14. Turn handle; 15. Support plate; 16. Telescopic rod; 17. Return spring; 18. Limiting plate; 19. Limiting column; 20. Traction block. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1 - Figure 4 This application will be described in further detail.

[0022] A leakage current detection device for power transmission lines, referring to Figure 1 - Figure 4The system includes a base 1, with upright plates 2 symmetrically installed at both ends of the top of the base 1. Slide rods 3 are installed between the outer sides of the upright plates 2. Several sets of sliders 4 are installed at equal intervals on the outside of the slide rods 3. A movable plate 5 is provided on the top of the upright plates 2 and the sliders 4. Several sets of inclined grooves 501 are opened on the top of the movable plate 5. A support column 6 is installed on the top of the sliders 4 and inside the inclined grooves 501. A base 7 is installed on the top of the support column 6. A leakage current detector 8 is installed on the top of the base 7. A support frame 9 is installed at one end of the top of the base 7. A movable roller 10 is installed on the inner side wall of the support frame 9.

[0023] Reference Figure 2 A fixed plate 11 is installed on the top of the base 1 along one of its longer edges. A threaded rod 12 is installed on the fixed plate 11. A connecting plate 13 is installed at one end of the bottom of the movable plate 5. One end of the threaded rod 12 is rotatably connected to the connecting plate 13. The end of the threaded rod 12 away from the connecting plate 13 passes through the fixed plate 11 and is fitted with a handle 14. By rotating the handle 14, the threaded rod 12 can be driven to rotate within the fixed plate 11. Due to the thread action, the rotation of the threaded rod 12 is converted into linear movement of the connecting plate 13 and the movable plate 5, thereby driving the movable plate 5 to move on the two upright plates 2.

[0024] Reference Figure 2 - Figure 3 The inclined grooves 501 have different inclination angles. When the movable plate 5 moves on top of the two upright plates 2, the support column 6 slides synchronously inside the inclined groove 501. The outer ring surface of the slide rod 3 is slidably connected to the interior of multiple sets of sliders 4, and the bottom of the slider 4 is in contact with the top of the base 1. When the movable plate 5 moves, it will squeeze the support column 6 inside through the external multiple sets of inclined grooves 501. The movement of the support column 6 synchronously drives the slider 4 to move outside the slide rod 3. The bottom of the slider 4 is in contact with the top of the base 1, which increases the stability of the movement of the slider 4. This makes it easy to adjust the spacing of multiple sets of bases 7 to suit lines with different spacings and to facilitate the simultaneous testing of multiple sets of lines.

[0025] Reference Figure 4A support plate 15 is installed on one end of the base 7. A telescopic rod 16 is installed on the top of the support plate 15. A return spring 17 is installed on the outer ring surface of the telescopic rod 16. A limit plate 18 is installed on the top of the telescopic rod 16. The limit plate 18 does not interfere with the movable roller 10. Pressing down the limit plate 18 will simultaneously compress the telescopic rod 16 and the return spring 17, which makes it easy to place the power transmission line under the two sets of movable rollers 10. When the device moves, the movable roller 10 rolls synchronously along the power transmission line, which makes it easy for the leakage detector 8 to detect the line. After the line is installed at the bottom of the movable roller 10, the limit plate 18 can be released to reset, preventing the device from falling off the line. Limit posts 19 are symmetrically installed at both ends of the bottom of the limit plate 18. One end of the bottom of the limit post 19 passes through the support plate 15 and extends below its bottom. When the limit plate 18 moves, it synchronously drives the limit post 19 to slide on the support plate 15, which increases the stability of the limit plate 18's lifting and lowering.

[0026] Reference Figure 1 A traction block 20 is installed on the outer end of the base 1 away from the fixed plate 11. The traction block 20 is set to facilitate connection with the traction rope to pull the device to detect the power transmission line.

[0027] The implementation principle of a leakage current detection device for power transmission lines according to an embodiment of this application is as follows: When using the device, rotating the handle 14 drives the threaded rod 12 to rotate within the fixed plate 11. Due to the thread action, the rotation of the threaded rod 12 is converted into linear movement of the connecting plate 13 and the movable plate 5, thereby driving the movable plate 5 to move on the two vertical plates 2. When the movable plate 5 moves, it squeezes the internal support column 6 through multiple sets of external inclined grooves 501. The movement of the support column 6 synchronously drives the slider 4 to move outside the slide rod 3, and the bottom of the slider 4 is in contact with the top of the base 1, which increases the stability of the slider 4's movement. This facilitates the spacing adjustment of multiple sets of bases 7 to suit lines with different spacings, and facilitates the detection of multiple sets of lines. The transmission line is simultaneously tested. By pressing down the limiting plate 18, the telescopic rod 16 and the return spring 17 are compressed synchronously, making it easy to place the transmission line under the two sets of movable rollers 10. When the device moves, the movable rollers 10 roll synchronously along the transmission line, which facilitates the leakage detector 8 to test the line. After the line is installed at the bottom of the movable rollers 10, the limiting plate 18 can be released to reset the device, preventing it from falling off the line. When the limiting plate 18 moves, it drives the two sets of limiting posts 19 to slide on the support plate 15, which increases the stability of the lifting and lowering of the limiting plate 18. The traction block 20 is set to facilitate connection with the traction rope to pull the device to test the transmission line. The operation is convenient. The external spiral opening angle of the threaded rod 12 is 20 degrees, and the thread self-locking condition is calculated by the following formula: self-locking condition = friction coefficient * tan (spiral angle) ≥ 1.

[0028] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0029] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0030] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0031] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A leakage detection device for power transmission lines, comprising a base (1), characterized in that: The base (1) has upright plates (2) symmetrically installed at both ends of its top. A sliding rod (3) is installed between the outer sides of the upright plates (2). Several sets of sliders (4) are installed at equal intervals on the outside of the sliding rods (3). A movable plate (5) is provided on the top of the upright plates (2) and the sliders (4). Several sets of inclined grooves (501) are opened on the top of the movable plate (5). A support column (6) is installed on the top of the slider (4) and inside the inclined groove (501). A base (7) is installed on the top of the support column (6). A leakage current detector (8) is installed on the top of the base (7). A support frame (9) is installed at one end of the top of the base (7). A movable roller (10) is installed on the inner side wall of the support frame (9).

2. The leakage current detection device for power transmission lines according to claim 1, characterized in that: A fixing plate (11) is installed on the top of the base (1) at one of its longer edges. A threaded rod (12) is installed on the fixing plate (11). A connecting plate (13) is installed at one bottom end of the movable plate (5). One end of the threaded rod (12) is rotatably connected to the connecting plate (13). The end of the threaded rod (12) away from the connecting plate (13) passes through the fixing plate (11) and is fitted with a throttle (14).

3. A leakage detection device for power transmission lines as claimed in claim 1, wherein: The outer ring surface of the slide bar (3) is slidably connected to the interior of multiple sets of sliders (4), and the bottom of the slider (4) is in contact with the top of the base (1).

4. The electric leakage detection device for power transmission lines as claimed in claim 1 wherein: The inclined grooves (501) have different inclination angles, and the support column (6) slides synchronously inside the inclined grooves (501) when the movable plate (5) moves on top of the two upright plates (2).

5. A leakage detection device for power transmission lines as claimed in claim 1, wherein: A support plate (15) is installed at one end of the base (7). A telescopic rod (16) is installed on the top of the support plate (15). A reset spring (17) is installed on the outer ring surface of the telescopic rod (16). A limit plate (18) is installed on the top of the telescopic rod (16). The limit plate (18) does not interfere with the movable roller (10).

6. A leakage detection device for a power transmission line as claimed in claim 5, wherein: Limiting posts (19) are symmetrically installed at both ends of the bottom of the limiting plate (18). One end of the bottom of the limiting post (19) penetrates through the support plate (15) and extends below its bottom.

7. The electric leakage detection device for power transmission lines as claimed in claim 1 wherein: A traction block (20) is installed on the outer end of the base (1) away from the fixing plate (11).

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