A lightning protection detection device for a power transmission line

Abstract

The application discloses a lightning protection detection device for a power transmission line and relates to the field of power transmission line detection. The device comprises a mounting seat, a box body fixedly connected to the top of the mounting seat, a detector installed in the box body, a cover plate rotatably installed on the top of the box body, an observation window and an extension hole formed in the top of the cover plate, a base fixedly connected to the bottom of the mounting seat, a moving assembly arranged in the base, a lifting assembly arranged on the side of the support away from the air slot, a handle arranged at the position of the top of the mounting seat on one side of the box body, and an adjusting assembly arranged at the connection between the handle and the mounting seat. The device can be conveniently moved and quickly fixed after being moved. The height of the four corners of the device can be adjusted through the support and the support plate, so that the device can be kept horizontal on different terrains. Finally, the height of the device can be adjusted by adjusting the angle of the handle, which is more stable than the method of screw locking.

Description

Technical Field

[0001] This invention relates to power transmission line testing technology, specifically to a power transmission line lightning protection testing device. Background Technology

[0002] Transmission lines are the core facilities in the power system used for the long-distance and efficient transmission of high-voltage electrical energy. They mainly connect power plants, substations and regional power grids. They are divided into overhead lines consisting of poles, conductors, insulators and fittings, and underground cable lines. They cover voltage levels such as high voltage, ultra-high voltage and extra-high voltage. Three-phase AC transmission is the main mode of transmission, combined with DC transmission to form a hybrid system. During operation, they need to deal with common risks such as lightning strikes, icing and external damage.

[0003] During the operation of power transmission lines, lightning protection detection devices are required for inspection. Patent publication number CN216133104U discloses a movable lightning protection detection device for power transmission lines, comprising a mounting plate, a base plate, and a placement box. A pulley is mounted on one side of the lower end face of the base plate, and support legs are mounted symmetrically to the pulleys on the lower end face of the base plate. The mounting plate is mounted on one side of the upper end face of the base plate, and symmetrically distributed mounting holes are formed on the mounting plate. A telescopic rod is fitted into each mounting hole, and a pull rod is installed at the end of the telescopic rod. The placement box is mounted on the upper end face of the base plate, and an array of second springs is installed on the inner wall of the bottom end of the placement box. The upper end of the second springs... A buffer plate is installed, and a first spring is installed on the inner wall of the side end of the placement box. A protective plate is installed at the end of the first spring. A cover plate is rotatably installed on the top of the placement box, and an observation window is provided on the cover plate. This utility model has the advantages of being easy to move and carry, and having shock absorption and good protection. The moving and fixing structure of the device in the comparative document is relatively simple, equipped with only two sets of rollers. It requires a tilting device when moving, which is inconvenient to operate and difficult to turn. At the same time, the support leg is fixed in height and cannot adapt to different terrains to maintain levelness, which affects the detection work. In addition, although the handle can be extended and adjusted in height, it is fixed by bolts, which is generally not stable and may loosen or fall off after long-term use.

[0004] To address the problems raised in the background art, those skilled in the art have proposed a lightning protection detection device for power transmission lines. Summary of the Invention

[0005] The purpose of this invention is to provide a lightning protection detection device for power transmission lines, so as to solve the problems of the existing technology, such as the cumbersome operation of moving the device, the inability to keep it level in different terrains, and the insufficient stability of the bolt locking handle.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a lightning protection detection device for power transmission lines, comprising a mounting base, a housing fixedly connected to the top of the mounting base, a detector installed inside the housing, a cover plate rotatably mounted on the top of the housing, an observation window and an extension hole on the top of the cover plate, a base fixedly connected to the bottom of the mounting base, a moving component disposed inside the base, a handle disposed on the top of the mounting base at a position on one side of the housing, and an adjustment component disposed at the connection between the handle and the mounting base.

[0007] Furthermore, the movable component includes a slot, a support, a first rotating groove, and a first rotating shaft. The slot is located at the bottom of the base, the support is movably connected to the slot, the first rotating groove is located on the inner walls of both sides of the slot, and the first rotating shaft is fixedly connected to both sides of the support at one end inside the slot and rotatably connected to the first rotating groove.

[0008] Furthermore, the movable component also includes a mounting block, casters, sockets, and rods. The mounting block is fixedly connected to the bottom of the support, the casters are mounted on the bottom of the mounting block, the sockets include two sets horizontally and two sets vertically, which respectively penetrate the inner walls of both sides of the slot and the mounting block, and are used to fix the support at different positions. The rods are provided in two sets and are adapted to the size of the sockets.

[0009] Furthermore, a lifting assembly is provided on the side of the support away from the empty slot. The lifting assembly includes a support plate, a lifting slot, a lifting plate, fixing holes, a through slot, and a fixing rod. The support plate is movably connected to the side of the support away from the empty slot. The lifting slot has a U-shaped longitudinal section and is located on the side of the support away from the empty slot. The lifting plate is fixedly connected to the side of the support plate near the support and slidably connected to the lifting slot. Several sets of fixing holes are provided and are located on the top surface of the lifting plate. The through slot penetrates the inner wall of the top of the lifting slot. The fixing rod is movably connected to the through slot and is adapted to the size of the fixing holes.

[0010] Furthermore, the lifting assembly also includes a first slide groove, a first slider, a first spring, and a first pull block. The first slide groove is formed on the inner wall of the through groove. The first slider is fixedly connected to the outer periphery of the fixed rod and slidably connected to the first slide groove. The first spring is sleeved on the outer periphery of the fixed rod and its two ends are respectively fixedly connected to the top of the first slider and the inner wall of the top of the first slide groove. The first pull block is fixedly connected to the top of the fixed rod.

[0011] Furthermore, the adjustment assembly includes a connecting seat, a second rotating groove, and a second rotating shaft. Two sets of connecting seats are provided and fixedly connected to the top of the mounting base and located on one side of the housing. The second rotating groove is opened on the inner surface of the connecting seat. The second rotating shaft is fixedly connected to both sides of the bottom of the handle and rotatably connected to the second rotating groove.

[0012] Furthermore, the adjustment assembly also includes a cavity, a second slide groove, a connecting groove, a pull rod, a second slider, and a second spring. The cavity is formed inside the second rotating shaft. The second slide groove is formed on the inner walls of the top and bottom of the cavity. The connecting groove passes through one side of the inner wall of the second rotating groove and communicates with the cavity. The pull rod is movably connected to the connecting groove and its inner end extends into the cavity. The second slider is fixedly connected to the inner end of the pull rod and slidably connected to the cavity and the second slide groove. The second spring is sleeved on the outer periphery of the pull rod near its inner end and its two ends are respectively fixedly connected to the inner wall of the second slider away from the handle and the inner wall of the cavity away from the handle.

[0013] Furthermore, the adjustment component also includes a slot, a block, and a second pull block. The slot is formed on the outer surface of the connecting seat and is located on the outer periphery of the connecting groove. Several sets of slots are provided and arranged in a ring. The block is fixedly connected to the outer periphery of the pull rod near the outer end and is adapted to the size of the slot. The second pull block is fixedly connected to the outer end of the pull rod.

[0014] Compared with the prior art, the lightning protection detection device for power transmission lines provided by the present invention has the following beneficial effects:

[0015] 1. Remove the insertion rod from the insertion hole, then rotate the first rotating shaft along the first rotating groove to make the support rotate. During this process, the mounting block will drive the caster to rotate synchronously with the support. When the caster rotates to be perpendicular to the ground, insert the insertion rod into the two sets of horizontal insertion holes and pass through the mounting block. At this time, the caster can be fixed at the current angle. Then, the device can be moved by the caster. After moving to the designated position, remove the insertion rod from the insertion hole again, then rotate the support in the opposite direction until the support is perpendicular to the ground. At this time, the mounting block drives the caster to rotate until it is submerged in the empty groove for storage. Then, insert the insertion rod into the two sets of vertical insertion holes and pass through the mounting block, thereby fixing the support at the current angle. At this time, the device can be fixed, making the fixing of the device more convenient.

[0016] 2. When the device needs to work outdoors, if the ground is uneven, after the device is fixed on the support, pull the first pull block outward so that it drives the first slider to slide outward along the first slide groove through the fixed rod and compress the first spring. When the fixed rod moves out of the fixed hole, slide the lifting plate along the lifting groove so that it drives the support plate to rise and fall synchronously. When the total height of the support and the support plate is enough to make the device level, release the first pull block. The first spring rebounds and drives the fixed rod to move inward through the first slider. When the fixed rod is inserted into the fixed hole at the current position, the lifting plate can be fixed at the current position, so that the device is kept level and thus avoids the device tilting and affecting the normal operation of the detection work. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure provided for an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure provided for an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure provided for an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure provided for an embodiment of the present invention;

[0023] Figure 6 This is a structural schematic diagram provided for an embodiment of the present invention.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Mounting base; 2. Housing; 3. Detector; 4. Cover plate; 5. Observation window; 6. Extension hole; 7. Base; 8. Moving assembly; 81. Empty slot; 82. Support; 83. First rotating slot; 84. First rotating shaft; 85. Mounting block; 86. Caster wheel; 87. Insertion hole; 88. Insertion rod; 9. Lifting assembly; 91. Support plate; 92. Lifting slot; 93. Lifting plate; 94. Fixing hole; 95. Through slot; 96. Fixing rod; 97. First slide groove; 98. First slider; 99. First spring; 910. First pull block; 10. Handle; 11. Adjustment component; 111. Connecting seat; 112. Second rotating groove; 113. Second rotating shaft; 114. Cavity; 115. Second slide groove; 116. Connecting groove; 117. Pull rod; 118. Second slider; 119. Second spring; 1110. Slot; 1111. Slot; 1112. Second pull block. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings in one embodiment of the present invention.

[0027] As attached Figure 1 To be continued Figure 6 As shown:

[0028] Example 1:

[0029] This invention provides a lightning protection testing device for power transmission lines, comprising: a mounting base 1; a housing 2 fixedly connected to the top of the mounting base 1; a testing instrument 3 installed inside the housing 2; a cover plate 4 rotatably mounted on the top of the housing 2; an observation window 5 and an extension hole 6 opened on the top of the cover plate 4; a base 7 fixedly connected to the bottom of the mounting base 1; a moving component 8 disposed inside the base 7; the moving component 8 including a slot 81, a support 82, a first rotating slot 83, a first rotating shaft 84, a mounting block 85, a caster wheel 86, a socket 87, and a plug rod 88.

[0030] In one embodiment of the present invention, a slot 81 is formed at the bottom of the base 7, a support 82 is movably connected to the slot 81, a first rotating groove 83 is formed on the inner walls of both sides of the slot 81, a first rotating shaft 84 is fixedly connected to both sides of the support 82 at one end inside the slot 81 and rotatably connected to the first rotating groove 83, a mounting block 85 is fixedly connected to the bottom of the support 82, a caster wheel 86 is mounted on the bottom of the mounting block 85, and the insertion holes 87 include two sets horizontally and two sets vertically, respectively penetrating the inner walls of both sides of the slot 81 and the mounting block 85, for fixing the support 82 at different positions, and two sets of insertion rods 88 are provided and adapted to the size of the insertion holes 87;

[0031] The support 7 is made of high-strength aluminum alloy, which has a density of only 2.7g / cm³, 40% lighter than traditional carbon steel, significantly reducing the overall weight of the equipment. At the same time, its tensile strength is over 300MPa, which can withstand the weight of the equipment and the impact load during outdoor transportation, preventing deformation. The surface is anodized, with excellent corrosion resistance, making it suitable for humid and dusty outdoor environments. The caster 86 is made of wear-resistant polyurethane wheel body, paired with stainless steel axle. The Shore hardness of polyurethane is 85A, and its wear resistance coefficient is 3 times that of ordinary rubber, which can cope with complex road conditions such as sand and mud and is not easily worn. The axle has built-in high-precision ball bearings, with low rotational resistance, ensuring smooth and uninterrupted movement of the equipment. It also has a silent design to reduce noise pollution during transportation. The insertion rod 88 is made of 304 stainless steel, with strong rust resistance. The surface is polished, with low insertion and extraction resistance. The rod diameter is 12mm, and the length is adapted to the depth of the insertion hole (87), ensuring that it is inserted in place when fixed, without any risk of loosening.

[0032] Working principle: First, remove the insertion rod 88 from the insertion hole 87. Then, rotate the first rotating shaft 84 along the first rotating groove 83 to drive the support 82 to rotate. During this process, the mounting block 85 will drive the caster 86 to rotate synchronously with the support 82. When the caster 86 rotates to be perpendicular to the ground, insert the insertion rod 88 into the two sets of horizontal insertion holes 87 and pass through the mounting block 85. At this time, the caster 86 can be fixed at the current angle. Then, the device can be moved by the caster 86. After moving to the designated position, insert the insertion rod 88 again... 8 is removed from the socket 87, and then the support 82 is rotated in the opposite direction until the support 82 is perpendicular to the ground. At this time, the mounting block 85 drives the caster 86 to rotate into the slot 81 for storage. Then, the plug rod 88 is inserted into the two sets of vertical sockets 87 and passes through the mounting block 85, thereby fixing the support 82 at the current angle. At this time, the device can be fixed. Then, the circuit can be tested by the tester 3 in the box 2. During the test, the staff can observe and operate the tester 3 through the observation window 5 and the extension hole 6.

[0033] Example 2:

[0034] This embodiment is basically the same as the previous embodiment, except that a lifting component 9 is provided on the side of the support 82 away from the empty slot 81. The lifting component 9 includes a support plate 91, a lifting slot 92, a lifting plate 93, a fixing hole 94, a through slot 95, a fixing rod 96, a first sliding groove 97, a first slider 98, a first spring 99, and a first pull block 910.

[0035] In one embodiment of the present invention, the support plate 91 is movably connected to the side of the support 82 away from the empty slot 81, the lifting slot 92 has a concave cross section and is opened on the side of the support 82 away from the empty slot 81, the lifting plate 93 is fixedly connected to the side of the support plate 91 close to the support 82 and is slidably connected to the lifting slot 92, a number of fixing holes 94 are provided and are opened on the top surface of the lifting plate 93, the through slot 95 penetrates the top inner wall of the lifting slot 92, the fixing rod 96 is movably connected to the through slot 95 and is adapted to the size of the fixing hole 94, the first sliding slot 97 is opened on the inner wall of the through slot 95, the first slider 98 is fixedly connected to the outer periphery of the fixing rod 96 and is slidably connected to the first sliding slot 97, the first spring 99 is sleeved on the outer periphery of the fixing rod 96 and its two ends are respectively fixedly connected to the top of the first slider 98 and the top inner wall of the first sliding slot 97, and the first pull block 910 is fixedly connected to the top of the fixing rod 96;

[0036] The lifting plate 93 and the support plate 91 are made of Q235 carbon steel and are stamped and formed with a thickness of 5mm. They are high in strength and not easy to bend or deform. The bottom of the support plate 91 is bonded with a 10mm thick anti-slip rubber pad. The rubber material is wear-resistant nitrile rubber with a Shore hardness of 70A and a coefficient of friction of 0.8, which can effectively increase the friction with the ground and prevent the equipment from sliding. The fixing rod 96 is made of 304 stainless steel and the surface of the rod is chrome-plated, which is rust-proof and smooth, and has low insertion and removal resistance. The first pull block (910) at the top is made of ABS engineering plastic and has anti-slip texture on the surface, which makes it convenient for operators to grip and apply force.

[0037] Working principle: When the device needs to work outdoors, if the ground is uneven, after the device is fixed on the support 82, pull the first pull block 910 outward so that it drives the first slider 98 to slide outward along the first slide groove 97 through the fixed rod 96 and compress the first spring 99. When the fixed rod 96 moves out of the fixed hole 94, slide the lifting plate 93 along the lifting groove 92 so that it drives the support plate 91 to rise and fall synchronously. When the total height of the support 82 and the support plate 91 is enough to make the device level, release the first pull block 910. The first spring 99 rebounds and drives the fixed rod 96 to move inward through the first slider 98. When the fixed rod 96 is inserted into the fixed hole 94 at the current position, the lifting plate 93 can be fixed in the current position, so that the device is kept level and thus avoids the device tilting and affecting the normal operation of the detection work.

[0038] Example 3:

[0039] This embodiment is basically the same as the previous embodiment, except that a handle 10 is provided on the top of the mounting base 1 at one side of the housing 2, and an adjustment component 11 is provided at the connection between the handle 10 and the mounting base 1. The adjustment component 11 includes a connecting base 111, a second rotating groove 112, a second rotating shaft 113, a cavity 114, a second sliding groove 115, a connecting groove 116, a pull rod 117, a second slider 118, a second spring 119, a slot 1110, a locking block 1111, and a second pull block 1112.

[0040] In one embodiment of the present invention, two sets of connecting seats 111 are provided and fixedly connected to the top of the mounting base 1 and located on one side of the housing 2. A second rotating groove 112 is formed on the inner surface of the connecting seat 111. A second rotating shaft 113 is fixedly connected to both sides of the bottom of the handle 10 and rotatably connected to the second rotating groove 112. A cavity 114 is formed inside the second rotating shaft 113. A second sliding groove 115 is formed on the inner walls of the top and bottom of the cavity 114. A connecting groove 116 penetrates one side of the inner wall of the second rotating groove 112 and communicates with the cavity 114. A pull rod 117 is movably connected to the connecting groove 116 and its inner end extends into the cavity 114. A second slider 11 8 is fixedly connected to the inner end of the pull rod 117 and slidably connected to the cavity 114 and the second slide groove 115. The second spring 119 is sleeved on the outer periphery of the pull rod 117 near the inner end and its two ends are respectively fixedly connected to the inner wall of the second slider 118 away from the handle 10 and the inner wall of the cavity 114 away from the handle 10. The slot 1110 is opened on the outer surface of the connecting seat 111 and is located on the outer periphery of the connecting groove 116. The slot 1110 is provided in several groups and is arranged in a ring. The block 1111 is fixedly connected to the outer periphery of the pull rod 117 near the outer end and is adapted to the size of the slot 1110. The second pull block 1112 is fixedly connected to the outer end of the pull rod 117.

[0041] The second pivot 113 is made of 40Cr alloy steel, which has been quenched and tempered to achieve a hardness of HRC30-35. It has good toughness and can withstand the torque when the handle 10 is rotated. The pull rod 117 is made of high-strength aluminum alloy, which is lightweight and strong. The surface is sandblasted for a comfortable feel.

[0042] Working principle: The device can be moved by pushing the handle 10. If the height of the handle 10 is not suitable for the height of the operator, the second pull block 1112 is pulled outward, causing it to drive the second slider 118 to slide outward along the cavity 114 and the second slide groove 115 via the pull rod 117, thus compressing the second spring 119. When the locking block 1111 moves outward with the pull rod 117 and moves out of the locking groove 1110, the pull rod 117 is rotated to drive the second slider 118 to rotate synchronously. Since the second slider 118 is slidably connected to the cavity 114 and the second slide groove 115, and the second slide groove 115 is opened in the cavity 114... The top and bottom inner walls, therefore the second slider 118 will drive the second rotating shaft 113 to rotate synchronously with the pull rod 117, thereby adjusting the angle of the handle 10. When the handle 10 is rotated to a height that matches the height of the staff, the second pull block 1112 is released, the second spring 119 rebounds and drives the pull rod 117 to move inward through the second slider 118. When the locking block 1111 moves inward with the pull rod 117 to the insertion slot 1110, the pull rod 117 can be fixed at the current angle, thereby fixing the handle 10 at the current angle and height. Then the staff can move the device through the handle 10.

[0043] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A lightning protection detection device for power transmission lines, comprising a mounting base (1), characterized in that, The mounting base (1) is fixedly connected to the top of the housing (2), the housing (2) is equipped with a detector (3), the top of the housing (2) is rotatably mounted with a cover plate (4), the top of the cover plate (4) is provided with an observation window (5) and an extension hole (6), the bottom of the mounting base (1) is fixedly connected to a base (7), the base (7) is provided with a moving component (8), the top of the mounting base (1) is provided with a handle (10) on one side of the housing (2), and an adjustment component (11) is provided at the connection between the handle (10) and the mounting base (1).

2. The lightning protection detection device for transmission lines according to claim 1, characterized in that, The moving component (8) includes a slot (81), a support (82), a first rotating groove (83), and a first rotating shaft (84). The slot (81) is located at the bottom of the base (7). The support (82) is movably connected to the slot (81). The first rotating groove (83) is located on the inner walls of both sides of the slot (81). The first rotating shaft (84) is fixedly connected to both sides of the support (82) at one end inside the slot (81) and rotatably connected to the first rotating groove (83).

3. The lightning protection detection device for transmission lines according to claim 2, characterized in that, The movable component (8) also includes a mounting block (85), a caster wheel (86), a socket (87), and a rod (88). The mounting block (85) is fixedly connected to the bottom of the support (82). The caster wheel (86) is installed on the bottom of the mounting block (85). The socket (87) includes two sets in the horizontal direction and two sets in the vertical direction, which pass through the inner walls of both sides of the slot (81) and the mounting block (85) respectively, and are used to fix the support (82) in different positions. The rod (88) is provided in two sets and is adapted to the size of the socket (87).

4. The lightning protection detection device for transmission lines according to claim 2, characterized in that, A lifting assembly (9) is provided on the side of the support (82) away from the empty slot (81). The lifting assembly (9) includes a support plate (91), a lifting slot (92), a lifting plate (93), a fixing hole (94), a through slot (95), and a fixing rod (96). The support plate (91) is movably connected to the side of the support (82) away from the empty slot (81). The lifting slot (92) has a concave cross section and is located on the side of the support (82) away from the empty slot (81). The lifting plate (93) is fixedly connected to the side of the support plate (91) near the support (82) and is slidably connected to the lifting slot (92). Several sets of fixing holes (94) are provided and are located on the top surface of the lifting plate (93). The through slot (95) penetrates the inner wall of the top of the lifting slot (92). The fixing rod (96) is movably connected to the through slot (95) and is adapted to the size of the fixing hole (94).

5. The lightning protection detection device for transmission lines according to claim 4, characterized in that, The lifting assembly (9) further includes a first slide groove (97), a first slider (98), a first spring (99), and a first pull block (910). The first slide groove (97) is opened on the inner wall of the through groove (95). The first slider (98) is fixedly connected to the outer periphery of the fixed rod (96) and slidably connected to the first slide groove (97). The first spring (99) is sleeved on the outer periphery of the fixed rod (96) and its two ends are respectively fixedly connected to the top of the first slider (98) and the inner wall of the top of the first slide groove (97). The first pull block (910) is fixedly connected to the top of the fixed rod (96).

6. The lightning protection detection device for transmission lines according to claim 1, characterized in that, The adjustment assembly (11) includes a connecting seat (111), a second rotating groove (112), and a second rotating shaft (113). The connecting seat (111) is provided in two sets and is fixedly connected to the top of the mounting base (1) and located on one side of the housing (2). The second rotating groove (112) is opened on the inner surface of the connecting seat (111). The second rotating shaft (113) is fixedly connected to both sides of the bottom of the handle (10) and rotatably connected to the second rotating groove (112).

7. The lightning protection detection device for transmission lines according to claim 6, characterized in that, The adjusting assembly (11) further includes a cavity (114), a second slide groove (115), a connecting groove (116), a pull rod (117), a second slider (118), and a second spring (119). The cavity (114) is located inside the second rotating shaft (113). The second slide groove (115) is located on the top and bottom inner walls of the cavity (114). The connecting groove (116) passes through one side of the inner wall of the second rotating groove (112) and communicates with the cavity (114). The rod (117) is movably connected to the connecting groove (116) and its inner end extends into the cavity (114). The second slider (118) is fixedly connected to the inner end of the pull rod (117) and slidably connected to the cavity (114) and the second slide groove (115). The second spring (119) is sleeved on the outer periphery of the pull rod (117) near the inner end and its two ends are respectively fixedly connected to the side of the second slider (118) away from the handle (10) and the inner wall of the cavity (114) away from the handle (10).

8. The lightning protection detection device for transmission lines according to claim 7, characterized in that, The adjustment component (11) further includes a slot (1110), a block (1111), and a second pull block (1112). The slot (1110) is opened on the outer surface of the connecting seat (111) and is located on the outer periphery of the connecting groove (116). The slot (1110) is provided in several groups and is arranged in a ring. The block (1111) is fixedly connected to the outer periphery of the pull rod (117) near the outer end and is adapted to the size of the slot (1110). The second pull block (1112) is fixedly connected to the outer end of the pull rod (117).

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