A power distribution line arrester installation device

Abstract

The application belongs to the technical field of cable installation, and discloses a lightning arrester installation device for distribution line, which comprises a cross arm, the top of the cross arm is fixedly connected with a mounting frame, the end of the mounting frame is fixedly connected with a lightning arrester body, the top of the lightning arrester body is fixedly connected with a incoming line, and the device further comprises a multi-size installation mechanism and an automatic locking mechanism. By integrating pressure sensing and mechanical locking in the same screw feeding stroke, integrated control and anti-loose locking of the clamping force threshold are realized. No matter the diameter of the cable, when the pressure of the cross plate on the cable reaches the preset value of the butterfly spring, the convex block and the tooth can be accurately engaged, the locking mechanism is automatically effective, when reversely rotating, the convex block is separated from the tooth, the butterfly spring rebounds, and the device can be easily unlocked and disassembled. Meanwhile, the cooperation of the locked tooth and the convex block provides reliable anti-loose effect, and effectively avoids the risk of connection loosening caused by long-term vibration.

Description

Technical Field

[0001] This invention belongs to the field of cable installation technology, specifically a surge arrester installation device for power distribution lines. Background Technology

[0002] A surge arrester is an electrical protection device installed on power distribution lines (10kV, 20kV, etc. overhead lines) to protect line insulators, conductors, and power distribution equipment from damage caused by lightning overvoltage. It is usually installed in parallel next to the insulators. When the line is struck by lightning, the surge arrester can quickly discharge the lightning current into the ground and cut off the power frequency follow current, thereby protecting the line from tripping or breaking.

[0003] The prior art document, CN112909819B, discloses a live-line installation device and method for surge arresters used in overhead power distribution lines. The device includes a support and anti-tilting mechanism to support the entire installation device, a rotary drive mechanism for disassembling the lower bolts of the insulator, a lifting mechanism for lifting the insulator upwards, a clamping mechanism for holding the insulator, and a method for installing the surge arrester using the device. This device can be operated by a single power technician, easily performing operations such as loosening bolts, lifting the insulator, straightening the insulator, and tightening bolts. The installation process is simple, efficient, safe, and saves time and effort.

[0004] While the aforementioned patent achieves the goal of installing surge arresters on live wires, it cannot effectively solve the following problems: First, when the device is used to connect the surge arrester's inlet to the cable, different diameter cables require manual adjustment of the clamping gap, resulting in poor adaptability; Second, when using ordinary threaded rods for clamping, operators cannot perceive whether the clamping force has reached the safety threshold, which can easily damage the cable core due to excessive tightness or cause poor contact due to excessive looseness, thus affecting the protective effect of the surge arrester. Summary of the Invention

[0005] The purpose of this invention is to provide a surge arrester installation device for power distribution lines that can adapt to cable diameter and has a self-locking function in place, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a surge arrester installation device for power distribution lines, comprising a crossarm, a mounting frame fixedly connected to the top of the crossarm, a surge arrester body fixedly connected to the end of the mounting frame, and an incoming line fixedly connected to the top of the surge arrester body, and further comprising:

[0007] A multi-size mounting mechanism, located at the end of the inlet line;

[0008] An automatic locking mechanism, which is connected to a multi-size mounting mechanism;

[0009] The multi-size installation mechanism includes an inverted V-shaped clamping plate fixed to the end of the incoming line. The inverted V-shaped clamping plate has a first sliding groove and a second sliding groove on both sides, and a horizontal plate is movably connected inside both of them. Anti-detachment blocks are fixed to both ends of the horizontal plate. When the cable is inserted into the inverted V-shaped clamping plate, the horizontal plate can slide along the first sliding groove and the second sliding groove to the bottom of the cable, and the automatic locking mechanism provides flexible clamping and locking in place, thereby realizing a stable connection between the surge arrester incoming line and the cable.

[0010] Preferably, the multi-size installation mechanism further includes an inclined sleeve plate fixed to the outer wall of the inverted V-shaped clamping plate, and the inner cavity of the inclined sleeve plate is connected to the second sliding groove; the horizontal plate is located directly below the cable, and together with the inverted V-shaped clamping plate, it forms a triangular clamping area around the cable. The two inclined surfaces of the inverted V-shaped clamping plate contact the cable from the upper left and upper right directions, respectively, while the horizontal plate provides upward support from directly below. The three points of force constitute statically determinate support, which can maintain stable geometric constraints no matter how the cable vibrates or is subjected to tension.

[0011] Preferably, the edge of the horizontal plate is inclined at the same angle as the inclined sleeve plate, and the horizontal plate is slidably connected to the inner cavity of the inclined sleeve plate; the opening of the inverted V-shaped clamping plate faces downward, making the installation process ergonomic. The operator only needs to lift the plate once to complete the hanging of the wire, which greatly reduces arm fatigue when working with live wires at height. The operator pushes the horizontal plate back inward smoothly, so that it slides along the first slide groove. The anti-detachment blocks at both ends of the horizontal plate are always stuck in the slide groove to prevent the horizontal plate from accidentally falling off due to misoperation or vibration.

[0012] Preferably, a semi-threaded rod is movably connected to the bottom of the inverted V-shaped plate, and the threaded groove of the semi-threaded rod is located in the lower half.

[0013] Preferably, a top plate is fixed to the top of the semi-threaded rod, and a handle is fixed to the bottom of the semi-threaded rod; the upper half of the semi-threaded rod is a smooth rod, and the thread is only set in the lower half. This design allows the semi-threaded rod to move freely up and down without being constrained by the thread during the initial screwing stage, which facilitates quick positioning. Only when the thread engages does it produce precise feed.

[0014] Preferably, a groove is formed in the middle of the horizontal plate, and the size of the groove is larger than that of the top plate.

[0015] Preferably, the automatic locking mechanism includes a butterfly spring fixed to the top of the top plate, and a ball bearing is rotatably connected to the top of the butterfly spring via a retainer. The outer wall of the ball bearing abuts against the inner wall of the groove. The top plate at the top of the semi-threaded rod drives the butterfly spring and the ball bearing into the groove in the middle of the horizontal plate. The ball bearing abuts against the inner wall of the groove and can rotate freely, converting sliding friction into rolling friction, significantly reducing the frictional resistance during rotation, and allowing the operator to easily rotate the threaded rod.

[0016] Preferably, the corners on both sides of the groove are fixed with locking teeth, and the combined thickness of the ball and the disc spring is greater than the height of the locking teeth. Before the cross plate contacts the cable, the disc spring is in a free state and is not compressed. The ball rolls in the groove, resulting in the highest mechanical efficiency of the entire transmission chain. The rotation process is easy and effortless. At the same time, the protrusions on the side wall of the top plate are located below the locking teeth on both sides of the groove. There is a short axial gap between them, so they do not contact each other and do not cause any obstruction.

[0017] Preferably, the sidewall of the top plate is fixed with several protrusions at equal intervals, and the outer side of the protrusions extends to the position of the locking teeth; the protrusions on the sidewall of the top plate are located below the locking teeth on both sides of the groove, with a short axial gap between them, so they do not contact each other and do not cause any obstruction. When the upper surface of the horizontal plate gradually approaches and finally abuts against the lower surface of the cable, the continued rotation of the semi-threaded rod will generate an upward clamping force. This clamping force acts on the disc spring through the horizontal plate, causing the disc spring to undergo elastic deformation. The protrusions move upward to the same height as the locking teeth on both sides of the groove, and the protrusions are just locked into the grooves of the locking teeth, forming a mechanical lock.

[0018] Preferably, the bottom of the surge arrester body is connected through the mounting bracket, and an outgoing line is fixedly connected to the end, the outgoing line passing through the inside of the crossarm.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] This invention integrates pressure sensing and mechanical locking into the same threaded feed stroke, achieving integrated control and anti-loosening locking of the clamping force threshold. Regardless of the cable diameter, when the pressure of the cross plate on the cable reaches the preset value of the disc spring, the protrusion and the locking teeth can accurately engage, and the locking mechanism automatically takes effect. When rotating in the reverse direction, the protrusion disengages from the locking teeth, and the disc spring rebounds, making it easy to unlock and disassemble. At the same time, the locking teeth and protrusion cooperate to provide a reliable anti-loosening effect, effectively avoiding the risk of connection loosening caused by long-term vibration.

[0021] This invention achieves adaptive centering and triangular stable clamping of cables of different diameters by setting up a combination of structures such as an inverted V-shaped clamping plate, a horizontal plate, an inclined sleeve plate, and a first sliding groove. The V-shaped groove structure of the inverted V-shaped clamping plate allows the cable, regardless of its thickness, to automatically slide to the lowest point of the groove for initial positioning. After the horizontal plate slides along the first and second sliding grooves, it is inserted into the inclined sleeve plate, forming a triangular clamping area around the cable together with the inverted V-shaped clamping plate. Compared with the shortcomings of traditional devices that require manual adjustment of the clamping gap and are difficult to align, this invention achieves instant centering and instant fixation of the cable with a single clamping and pushing, significantly improving installation efficiency and adaptability.

[0022] This invention achieves low-friction rotation and automatic locking during clamping by using a combination of ball bearings, a butterfly spring, a protrusion, and locking teeth. In the initial stage of the horizontal plate's ascent, the ball bearings roll within the grooves, reducing rotational resistance and making operation easier and less strenuous. When the horizontal plate contacts the cable, the butterfly spring is compressed, generating flexible pressure to prevent rigid impact from damaging the cable core. When the pressure reaches a preset threshold, the protrusion engages with the locking teeth to form a mechanical lock, completing the clamping process. Compared to traditional bolt clamping, which relies on experience to judge tightness and is prone to being too tight or too loose, this invention achieves smooth rotation and self-locking upon reaching the desired position, ensuring consistent and reliable clamping force. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the present invention from a bottom view;

[0025] Figure 3 This is a side view of the structure of the present invention;

[0026] Figure 4 This is a schematic diagram showing the structural fit between the horizontal plate and the inverted V-shaped clamping plate of the present invention;

[0027] Figure 5 For the present invention Figure 4 A magnified view of the structure at point A in the middle;

[0028] Figure 6 This is a schematic diagram showing the structural fit between the horizontal plate and the top plate of the present invention;

[0029] Figure 7 This is a schematic diagram showing the structural fit between the disc spring and the top plate of the present invention;

[0030] Figure 8 This is a schematic diagram showing the structural fit between the protrusion and the top plate of the present invention.

[0031] In the picture:

[0032] 100. Crossarm; 200. Mounting bracket; 300. Surge arrester body; 400. Inlet line; 500. Outlet line; 600. Multi-size mounting mechanism; 610. Inverted V-shaped clamping plate; 620. First slide groove; 630. Slanted sleeve plate; 640. Horizontal plate; 650. Groove; 660. Semi-threaded rod; 670. Handle; 680. Second slide groove; 690. Top plate; 700. Automatic locking mechanism; 710. Clamping tooth; 720. Protrusion; 730. Butterfly spring; 740. Ball bearing. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] like Figures 1 to 8 As shown, the present invention provides a surge arrester installation device for power distribution lines, including a crossarm 100, a mounting bracket 200 fixedly connected to the top of the crossarm 100, a surge arrester body 300 fixedly connected to the end of the mounting bracket 200, and an incoming line 400 fixedly connected to the top of the surge arrester body 300, and further including:

[0035] A multi-size mounting mechanism 600 is located at the end of the inlet line 400;

[0036] Automatic locking mechanism 700, which is connected to multi-size mounting mechanism 600;

[0037] The multi-size installation mechanism 600 includes an inverted V-shaped clamping plate 610 fixed to the end of the incoming line 400. The inverted V-shaped clamping plate 610 has a first sliding groove 620 and a second sliding groove 680 on both sides, and a horizontal plate 640 is movably connected inside the two. Anti-detachment blocks are fixed to both ends of the horizontal plate 640. The bottom of the surge arrester body 300 passes through the mounting bracket 200, and an outgoing line 500 is fixed to the end. The outgoing line 500 passes through the inside of the crossarm 100.

[0038] The above-mentioned scheme includes: a mounting bracket 200 fixedly connected to the top of the crossarm 100; a surge arrester body 300 fixedly connected to the end of the mounting bracket 200; an incoming line 400 fixedly connected to the top of the surge arrester body 300; and a multi-size mounting mechanism 600 located at the end of the incoming line 400, and an automatic locking mechanism 700 connected to the multi-size mounting mechanism 600. The multi-size mounting mechanism 600 includes an inverted V-shaped locking plate 610 fixedly connected to the end of the incoming line 400, with a first sliding groove 620 and a second sliding groove 620 respectively opened on both sides of the inverted V-shaped locking plate 610. 80, and both are internally connected by a horizontal plate 640. Anti-detachment blocks are fixed to both ends of the horizontal plate 640. The bottom of the surge arrester body 300 passes through the mounting bracket 200 and the end is fixedly connected to the outlet wire 500. The outlet wire 500 passes through the inside of the crossarm 100. When the cable is inserted into the inverted V-shaped clamping plate 610, the horizontal plate 640 can slide along the first slide groove 620 and the second slide groove 680 to the bottom of the cable, and the automatic locking mechanism 700 provides flexible clamping and locking in place, thereby realizing a stable connection between the surge arrester inlet wire 400 and the cable.

[0039] like Figures 2 to 5As shown, the multi-size installation mechanism 600 also includes a slanted sleeve plate 630 fixed to the outer wall of the inverted V-shaped clamping plate 610, and the inner cavity of the slanted sleeve plate 630 is connected to the second sliding groove 680; the edge of the horizontal plate 640 is inclined at the same angle as the slanted sleeve plate 630, and the horizontal plate 640 is slidably connected to the inner cavity of the slanted sleeve plate 630; a semi-threaded rod 660 is movably connected to the bottom of the inverted V-shaped clamping plate 610, and the threaded groove of the semi-threaded rod 660 is located in the lower half; a top plate 690 is fixed to the top of the semi-threaded rod 660, and a handle 670 is fixed to the bottom of the semi-threaded rod 660; a groove 650 is opened in the middle of the horizontal plate 640, and the size of the groove 650 is larger than that of the top plate 690.

[0040] The above solution utilizes the following: The V-shaped structure of the inverted V-shaped clamp 610 has an adaptive centering function. The angle formed by its two inclined surfaces automatically adjusts the contact point according to the actual diameter of the cable. Regardless of the cable's thickness, the cable can automatically slide down to the lowest point of the V-shaped groove within the inverted V-shaped clamp 610 under gravity, achieving initial positioning. This V-shaped groove converts the cable diameter difference into a vertical offset of the contact position without requiring any moving parts or manual adjustment, solving the problem of adaptability of traditional connectors to different wire diameters. Simultaneously, the downward-facing opening of the inverted V-shaped clamp 610 makes the installation process ergonomic. Operators only need a single lifting motion to hang the cable, significantly reducing arm fatigue during high-altitude live-line work. The operator smoothly pushes the horizontal plate 640 inward, allowing it to slide along the first sliding groove 620. The anti-detachment blocks at both ends of the horizontal plate 640 remain engaged within the sliding groove, preventing accidental detachment due to misoperation or vibration. After the horizontal plate 640 is fully pushed in, its end is limited by the inner cavity end face of the inclined sleeve plate 630, forming a reliable axial stop. At this time, the horizontal plate 640 is located directly below the cable, forming a triangular clamping area around the cable together with the inverted V-shaped clamping plate 610. The two inclined surfaces of the inverted V-shaped clamping plate 610 contact the cable from the upper left and upper right directions, respectively, while the horizontal plate 640 provides upward support from directly below. The three points of force constitute a statically determinate support, which can maintain stable geometric constraints regardless of how the cable vibrates or is subjected to tension. Next, the operator slides the semi-threaded rod 660 upward, aligning the threaded groove of the lower half of the semi-threaded rod 660 with the threaded hole at the bottom of the inverted V-shaped clamping plate 610 and begins to screw it in. The upper half of the semi-threaded rod 660 is a smooth rod, and the thread is only set in the lower half. This design allows the semi-threaded rod 660 to move freely up and down without being constrained by the thread during the initial screwing stage, which is convenient for quick positioning; only after the thread enters the engagement does a precise feed motion occur. The top plate 690 at the top of the semi-threaded rod 660 drives the disc spring 730 and the ball bearing 740 into the groove 650 in the middle of the horizontal plate 640, where the ball bearing 740 abuts against the inner wall of the groove 650. The ball bearing 740 can rotate freely, converting sliding friction into rolling friction, significantly reducing frictional resistance during rotation, and allowing the operator to rotate it easily.

[0041] like Figures 4 to 8 As shown, the automatic locking mechanism 700 includes a butterfly spring 730 fixed to the top of the top plate 690. A ball bearing 740 is rotatably connected to the top of the butterfly spring 730 via a retainer. The outer wall of the ball bearing 740 abuts against the inner wall of the groove 650. A locking tooth 710 is fixed to both corners of the groove 650. The combined thickness of the ball bearing 740 and the butterfly spring 730 is greater than the height of the locking tooth 710. Several protrusions 720 are fixed at equal intervals to the side wall of the top plate 690. The outer side of the protrusions 720 extends to the position of the locking tooth 710.

[0042] Using the above scheme: The operator rotates the semi-threaded rod 660 via handle 670. The semi-threaded rod 660, under the action of the threaded pair, precisely advances upward, pushing the top plate 690 and the horizontal plate 640 upward together. Before the horizontal plate 640 contacts the cable, the disc spring 730 is in a free state and not compressed. The ball bearing 740 rolls within the groove 650, maximizing the mechanical efficiency of the entire transmission chain and making the rotation process easy and effortless. Simultaneously, the protrusion 720 on the side wall of the top plate 690 is located below the retaining teeth 710 on both sides of the groove 650, with a short axial gap between them, ensuring no contact and creating no obstruction. As the upper surface of the horizontal plate 640 gradually approaches and finally abuts against the lower surface of the cable, continued rotation of the semi-threaded rod 660 generates an upward clamping force. This clamping force acts on the disc spring 730 through the horizontal plate 640, causing the disc spring 730 to elastically deform. The disc spring 730 features high stiffness and minimal deformation, generating significant linear elastic force within a short compression stroke, thus creating a flexible pressure clamping mechanism. Unlike rigid threaded clamping, this flexible clamping allows the cable to undergo minute adaptive displacements during vibration or thermal expansion and contraction, while maintaining constant contact pressure. This effectively prevents rigid impacts from damaging the copper or aluminum wire structure of the cable core. Simultaneously, the top plate 690 continues to rise with the semi-threaded rod 660, and the protrusions 720 on its sidewalls move upwards to the same height as the locking teeth 710 on both sides of the groove 650. When the clamping force reaches a preset threshold value of the disc spring 730—a threshold determined by the combined thickness and material properties of the disc spring 730, typically set to an optimized value that ensures good electrical contact without damaging the cable core—the protrusions 720 precisely engage with the grooves of the locking teeth 710, forming a mechanical lock. The protrusion 720 is blocked by the vertical tooth surface of the locking tooth 710, preventing the semi-threaded rod 660 from rotating further. The operator's feel changes abruptly from smooth rotation to complete immobility; this abrupt change is clear and definite, requiring no visual inspection. Throughout the process, the low-friction characteristics of the ball bearing 740, the flexible pressure of the disc spring 730, and the locking action of the protrusion 720 and locking tooth 710 form a progressive mechanical logic of smooth rotation, flexible clamping, and rigid locking. Each step creates conditions for the next, ultimately achieving a convenient operating experience where the rod self-locks upon reaching the correct position. This greatly reduces the experience requirements for live-line work while ensuring a high degree of consistency in clamping force at each connection point.

[0043] Working principle and usage process of this invention:

[0044] First, the operator strips the insulation from the end of the cable to be connected, exposing a sufficient length of the inner core. Then, the horizontal plate 640 is pulled outwards, sliding along the first groove 620 and the second groove 680 to its outer end. At this point, the semi-threaded rod 660 hangs naturally under gravity, and the inverted V-shaped clamping plate 610 is in the open state. The operator holds the inverted V-shaped clamping plate 610 and inserts it into the stripped cable through the lower opening, embedding the cable into the V-shaped groove of the clamping plate 610. Because the V-shaped structure of the inverted V-shaped clamping plate 610 has a self-aligning function, regardless of the cable's thickness, the cable can automatically slide to the lowest point of the V-shaped groove, achieving initial positioning.

[0045] Next, the horizontal plate 640 is pushed inward, allowing it to slide along the first slide groove 620, guiding it smoothly into the second slide groove 680 and engaging within the inclined sleeve plate 630. Anti-detachment blocks at both ends of the horizontal plate 640 prevent accidental disengagement, while the beveled edge of the horizontal plate 640 engages with the inner cavity of the inclined sleeve plate 630, limiting its position. At this point, the horizontal plate 640 is positioned below the cable, forming a triangular clamping area around the cable together with the inverted V-shaped clamping plate 610. Then, the operator slides the semi-threaded rod 660 upward, aligning the threaded groove of the lower half of the semi-threaded rod 660 with the threaded hole at the bottom of the inverted V-shaped clamping plate 610 and begins to screw it in. The top plate 690 at the top of the semi-threaded rod 660 drives the disc spring 730 and the ball 740 into the groove 650 in the middle of the horizontal plate 640. The ball 740 abuts against the inner wall of the groove 650, which can significantly reduce the frictional resistance during rotation.

[0046] Next, the operator rotates the semi-threaded rod 660 via handle 670, pushing the top plate 690 and the horizontal plate 640 upwards together. Before the horizontal plate 640 contacts the cable, the disc spring 730 is in a free state, and the ball bearing 740 rolls within the groove 650, making the rotation process easy and effortless. Simultaneously, the protrusion 720 on the side wall of the top plate 690 is located below the retaining teeth 710 on both sides of the groove 650, without creating any obstruction. As the upper surface of the horizontal plate 640 gradually approaches and finally abuts against the lower surface of the cable, continued rotation of the semi-threaded rod 660 generates an upward clamping force. This clamping force compresses the disc spring 730 through the horizontal plate 640, causing the disc spring 730 to elastically deform, thus forming a flexible pressure clamp and preventing rigid impact damage to the cable core. At the same time, the top plate 690 continues to rise with the semi-threaded rod 660, and the protrusion 720 on its side wall moves upward to the same height as the retaining teeth 710 on both sides of the groove 650. When the clamping force reaches the preset threshold of the disc spring 730, the protrusion 720 is precisely engaged in the groove of the locking tooth 710, forming a mechanical lock. The protrusion 720 is blocked by the locking tooth 710, and the semi-threaded rod 660 cannot continue to rotate. The operator's feeling changes abruptly from light rotation to being unable to turn, thus clearly indicating that the clamping is complete.

[0047] Finally, since the locking mechanism relies entirely on mechanical travel and spring force, regardless of the cable thickness, the horizontal plate 640 has a larger upward travel for thinner cables and a smaller upward travel for thicker cables. When the pressure of the horizontal plate 640 on the cable reaches the preset value determined by the disc spring 730, the protrusion 720 and the locking teeth 710 can accurately engage, achieving the effect of automatic locking upon reaching the pressure. At this time, the cable is securely clamped from three directions by the inverted V-shaped locking plate 610 and the horizontal plate 640, ensuring a reliable connection. For disassembly, simply rotate the semi-threaded rod 660 in the reverse direction to disengage the protrusion 720 from the locking teeth 710, and the disc spring 730 will rebound, easily releasing the clamp. Throughout the installation process, the ball bearing 740 effectively reduces the frictional resistance during the initial rise of the horizontal plate 640, while the engagement of the locking teeth 710 and the protrusion 720 provides clear and identifiable positioning feedback and reliable anti-loosening locking. Compared to traditional bolt clamping, which requires experience to judge tightness and is prone to damage to cables due to excessive tightness or poor contact due to excessive looseness, this invention achieves smooth rotation and self-locking mechanical linkage, significantly improving the convenience, consistency and safety of the 400-terminal connection of the surge arrester in power distribution lines.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A surge arrester installation device for a power distribution line, comprising a crossarm (100), a mounting bracket (200) fixedly connected to the top of the crossarm (100), a surge arrester body (300) fixedly connected to the end of the mounting bracket (200), and an incoming line (400) fixedly connected to the top of the surge arrester body (300), characterized in that: Also includes: A multi-size mounting mechanism (600) is located at the end of the inlet line (400); An automatic locking mechanism (700) is connected to a multi-size mounting mechanism (600); The multi-size installation mechanism (600) includes an inverted V-shaped clamping plate (610) fixed to the end of the inlet line (400). The inverted V-shaped clamping plate (610) has a first sliding groove (620) and a second sliding groove (680) on both sides, and a horizontal plate (640) is movably connected inside both of them. Anti-detachment blocks are fixed to both ends of the horizontal plate (640).

2. The surge arrester installation device for power distribution lines according to claim 1, characterized in that: The multi-size installation mechanism (600) further includes a slanted sleeve plate (630) fixed to the outer wall of the inverted V-shaped clamping plate (610), and the inner cavity of the slanted sleeve plate (630) is connected to the second slide groove (680).

3. The surge arrester installation device for power distribution lines according to claim 2, characterized in that: The edge of the horizontal plate (640) is tilted at the same angle as the inclined sleeve plate (630), and the horizontal plate (640) is slidably connected to the inner cavity of the inclined sleeve plate (630).

4. The surge arrester installation device for power distribution lines according to claim 3, characterized in that: The bottom of the inverted V-shaped plate (610) is movably connected to a semi-threaded rod (660), and the threaded groove of the semi-threaded rod (660) is located in the lower half.

5. The surge arrester installation device for power distribution lines according to claim 4, characterized in that: A top plate (690) is fixed to the top of the semi-threaded rod (660), and a handle (670) is fixed to the bottom of the semi-threaded rod (660).

6. The surge arrester installation device for power distribution lines according to claim 5, characterized in that: A groove (650) is provided in the middle of the horizontal plate (640), and the size of the groove (650) is larger than that of the top plate (690).

7. The surge arrester installation device for power distribution lines according to claim 6, characterized in that: The automatic locking mechanism (700) includes a butterfly spring (730) fixed to the top of the top plate (690), and a ball (740) is rotatably connected to the top of the butterfly spring (730) via a sleeve. The outer wall of the ball (740) abuts against the inner wall of the groove (650).

8. The surge arrester installation device for power distribution lines according to claim 7, characterized in that: Both corners of the groove (650) are fixed with retaining teeth (710), and the combined thickness of the ball (740) and the butterfly spring (730) is greater than the height of the retaining teeth (710).

9. The surge arrester installation device for power distribution lines according to claim 8, characterized in that: The top plate (690) has several protrusions (720) fixed at equal intervals on its sidewalls, and the outer side of the protrusions (720) extends to the position of the locking teeth (710).

10. The surge arrester installation device for power distribution lines according to claim 1, characterized in that: The bottom of the surge arrester body (300) passes through the mounting bracket (200), and the end is fixedly connected to the outgoing line (500), which passes through the inside of the crossarm (100).

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