Extra-high voltage direct current line pin refilling tool

Abstract

The application relates to an extra-high voltage direct-current wire pin filling tool, which comprises an insulating rod, a driving mechanism, a pin positioning mechanism, a screw positioning mechanism, a camera mechanism, a controller and a display. The driving mechanism is arranged at the distal end of the insulating rod. The pin positioning mechanism is arranged on the driving mechanism and is used for holding a pin. The screw positioning mechanism is connected with the pin positioning mechanism and is used for holding a screw. The camera mechanism is arranged on the driving mechanism and is used for acquiring the image of the screw held on the screw positioning mechanism. The controller is arranged at the proximal end of the insulating rod and is used for controlling the driving mechanism to drive the pin to separate from the pin positioning mechanism and to be inserted into the pin hole of the screw. The display is arranged at the proximal end of the insulating rod and is used for displaying the image acquired by the camera mechanism. The extra-high voltage direct-current wire pin filling tool can improve the safety of pin filling operation.

Description

Technical Field

[0001] This application relates to the technical field of power transmission line maintenance tools, and in particular to a tool for replacing pins on ultra-high voltage DC lines. Background Technology

[0002] V-shaped insulator strings refer to two strings of insulators forming a V-shape, with the conductor suspended at the lower end and the upper end attached to the tower. The main function of V-shaped insulator strings is to limit the swaying of the insulator strings under wind conditions, thereby reducing the tower head size and the width of the line corridor. The adjustment plates of the V-shaped insulator strings need to be fixed in place by bolts. To enhance the stability of the bolts, pins are also inserted into them.

[0003] However, V-shaped insulator strings are exposed to the natural environment for extended periods, bearing not only the full tension of the conductor but also external hazards such as pollution, lightning strikes, and strong winds. This can easily lead to loosening or detachment of the pins on the bolts. If not replaced in time, this can develop into various faults, threatening the safe and stable operation of the power system. Technical guidelines typically require workers to descend onto the adjusting plate and insert new pins into the bolts to be replaced. However, due to the long and narrow width of the adjusting plate, and its steep slope, it is difficult for workers to reach the work point to replace the pins. Furthermore, the V-shaped insulator strings have relatively low tension, making the adjusting plate prone to swaying. Workers who descend onto the adjusting plate often struggle to maintain balance, increasing the risk of falls and compromising their safety. Summary of the Invention

[0004] Therefore, it is necessary to provide a pin replacement tool for ultra-high voltage DC lines to address the safety issues of pin replacement operations.

[0005] This application provides a tool for replacing pins on ultra-high voltage DC lines, comprising:

[0006] An insulating rod having a distal end and a proximal end arranged opposite to each other.

[0007] A drive mechanism is disposed at the distal end of the insulating rod;

[0008] A pin positioning mechanism is provided on the drive mechanism and is used to hold a pin.

[0009] A screw positioning mechanism, which is connected to the pin positioning mechanism, is used to hold the screw.

[0010] A camera mechanism is mounted on the drive mechanism and is used to acquire an image of a screw that is fixed to the screw positioning mechanism.

[0011] A controller is disposed near the end of the insulating rod and is communicatively connected to the drive mechanism. The controller is used to control the drive mechanism so that the drive mechanism drives the pin to disengage from the pin positioning mechanism and insert it into the pin hole of the screw.

[0012] A display is disposed near the end of the insulating rod, the display is communicatively connected to the camera mechanism, and the display is used to display images acquired by the camera mechanism.

[0013] The technical solution will be further explained below:

[0014] In one embodiment, the drive mechanism is rotatably connected to the distal end of the insulating rod, and the drive mechanism is capable of rotating about an axial direction perpendicular to the insulating rod.

[0015] In one embodiment, the drive mechanism includes:

[0016] The housing is connected to the far end of the insulating rod, and both the pin positioning mechanism and the camera mechanism are mounted on the housing.

[0017] A driving component, which is disposed in the housing and electrically connected to the controller;

[0018] A push rod, one end of which is connected to the output shaft of the drive component, and the other end of which is used to abut against the pin. The push rod is used to drive the pin away from the pin positioning mechanism and insert it into the pin hole of the screw under the drive of the drive component.

[0019] In one embodiment, the pin positioning mechanism includes:

[0020] The bracket is fixed to the housing;

[0021] The clamping member has a fixing hole for accommodating the pin. The fixing hole is disposed opposite to the push rod. The push rod can be driven by the driving member to pass through the fixing hole to push out the pin in the fixing hole.

[0022] In one embodiment, the fixing hole is an elongated hole, the clamping member is rotatably connected to the bracket, and the clamping member has a fixing position for fixing the pin and a clearance position for the pin to pass through.

[0023] The pin positioning mechanism also includes a linkage assembly, which is connected to the clamping member and cooperates with the push rod. The linkage assembly can drive the clamping member to rotate from a fixed position to an avoidance position under the drive of the push rod.

[0024] In one embodiment, the linkage assembly includes:

[0025] A pressure block, which is connected to the push rod and can move synchronously with the push rod, has an inclined surface;

[0026] A sliding rod, which is axially movable and passes through the bracket, with one end of the sliding rod contacting and engaging with the inclined surface;

[0027] A connecting rod, one end of which is fixedly connected to the sliding rod;

[0028] A swing arm, one end of which is rotatably connected to the connecting rod, and the other end of which is rotatably connected to the clamping member.

[0029] In one embodiment, the bracket is further provided with a positioning sensor, which is communicatively connected to the drive component. When the pressure block abuts against the positioning sensor, the positioning sensor controls the drive component to stop driving the push rod.

[0030] In one embodiment, the screw positioning mechanism includes the fixing clamp, one end of which is connected to the bracket. The fixing clamp has a fixing groove for the screw to pass through and for fixing the screw. The fixing groove has a relief groove on the side wall away from the bracket for avoiding the pin. The relief groove is disposed opposite to the fixing hole.

[0031] In one embodiment, the side wall of the insulating rod is provided with a hook for attaching to the conductor of the power transmission line.

[0032] In one embodiment, the insulating rod includes multiple sub-rods, which are detachably connected; and / or, the insulating rod is a telescopic rod.

[0033] The aforementioned UHVDC line pin replacement tool incorporates a drive mechanism, a pin positioning mechanism, a screw positioning mechanism, and a camera mechanism at the far end of the insulating rod, and a controller and display at the near end. By using the pin positioning mechanism to hold the pin and the screw positioning mechanism to hold the screw, workers can operate the drive mechanism from the tower or ground. This allows the drive mechanism to disengage the pin from the pin positioning mechanism and insert it into the pin hole of the screw, completing the pin replacement work. This reduces the risk of falls from heights, ensuring worker safety. Furthermore, during the replacement process, workers can observe the real-time relative position images of the pin and screw captured by the camera mechanism on the display, allowing for timely adjustments and improving the accuracy and efficiency of the replacement. Attached Figure Description

[0034] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0035] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the various components are shown as examples only and not necessarily to scale. In the accompanying drawings:

[0037] Figure 1 This is a schematic diagram of the structure of an ultra-high voltage DC line pin replacement tool according to one embodiment.

[0038] Figure 2 This is a front view of the remote mechanism of an ultra-high voltage DC line pin replacement tool according to an embodiment.

[0039] Figure 3 for Figure 2 The isometric view of the remote mechanism shown.

[0040] Figure 4 for Figure 2 The diagram shows the structure of the remote mechanism with the camera mechanism hidden from another viewpoint.

[0041] Figure 5 for Figure 4 The image shows a magnified view of part A.

[0042] Explanation of reference numerals in the attached figures:

[0043] 10. Insulating rod; 11. Hook; 20. Drive mechanism; 21. Housing; 22. Drive component; 23. Push rod; 30. Pin positioning mechanism; 31. Bracket; 32. Clamping component; 321. Fixing hole; 33. Linkage assembly; 331. Pressure block; 332. Slide rod; 333. Connecting rod; 334. Swing rod; 34. Position sensor; 40. Screw positioning mechanism; 41. Fixing clamp; 411. Fixing groove; 412. Clearance groove; 50. Camera mechanism; 60. Controller; 70. Display; 80. Pin; 90. Screw. Detailed Implementation

[0044] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0045] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0046] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0048] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0049] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0050] One embodiment of this application provides a pin replacement tool for ultra-high voltage direct current (UHVDC) transmission lines, used for replacing pins on screws in transmission lines. It is understood that this UHVDC pin replacement tool can also be used in other applications to replace pins on screws. Furthermore, the type of pin to be replaced can be a cylindrical pin or a cotter pin, etc., and is not limited thereto.

[0051] Specifically, see Figure 1 , Figure 1A schematic diagram of a UHVDC line pin replacement tool according to an embodiment of this application is shown. Specifically, the UHVDC line pin replacement tool includes an insulating rod 10, a drive mechanism 20, a pin positioning mechanism 30, a screw positioning mechanism 40, a camera mechanism 50, a controller 60, and a display 70. The insulating rod 10 has a distal end and a proximal end arranged opposite to each other. The drive mechanism 20 is disposed at the distal end of the insulating rod 10. The pin positioning mechanism 30 is disposed on the drive mechanism 20 and is used to hold a pin 80. The screw positioning mechanism 40 is connected to the pin positioning mechanism 30 and is used to hold a screw 90. The camera mechanism 50 is disposed on the drive mechanism 20 and is used to acquire an image of the screw 90 held on the screw positioning mechanism 40. A controller 60 is located near the insulating rod 10 and is communicatively connected to the drive mechanism 20. The controller 60 is used to operate the drive mechanism 20 so that the drive mechanism 20 drives the pin 80 to disengage from the pin positioning mechanism 30 and insert it into the pin hole of the screw 90. A display 70 is located near the insulating rod 10 and is communicatively connected to the camera mechanism 50. The display 70 is used to display the images acquired by the camera mechanism 50.

[0052] Specifically, when a replacement pin 80 is needed, the worker can stand on the pole or the ground, first fix the pin 80 to be replaced onto the pin positioning mechanism 30, then hold the near end of the insulating rod 10 and extend the far end of the insulating rod 10 toward the screw 90 where the pin 80 needs to be replaced. Simultaneously, the worker observes the image acquired by the camera mechanism 50 through the display 70, using the image to guide the screw 90 into the screw positioning mechanism 40, aligning the pin hole of the screw 90 with the pin 80. Then, the operator 60 controls the drive mechanism 20 to drive the pin 80 out of the pin positioning mechanism 30 and into the pin hole of the screw 90. During this process, the worker observes the insertion of the pin 80 into the pin hole of the screw 90 in real time. Once the pin 80 is fully inserted, the screw 90 can be removed from the screw positioning mechanism 40, thus completing the replacement of the pin 80.

[0053] In the aforementioned UHVDC line pin replacement tool, a drive mechanism 20, a pin positioning mechanism 30, a screw positioning mechanism 40, and a camera mechanism 50 are installed at the far end of the insulating rod 10, while a controller 60 and a display 70 are installed at the near end of the insulating rod 10. By using the pin positioning mechanism 30 to hold the pin 80 and the screw positioning mechanism 40 to hold the screw 90, workers can stand on the tower or the ground and operate the drive mechanism 20 via the controller 60. This allows the drive mechanism 20 to drive the pin 80 out of the pin positioning mechanism 30 and insert it into the pin hole of the screw 90, completing the pin replacement work. This reduces the risk of falls from heights and ensures the safety of workers. Furthermore, during the replacement process, workers can observe the real-time relative position images of the pin 80 and screw 90 acquired by the camera mechanism 50 on the display 70, allowing for timely adjustments, improving the accuracy of pin replacement, and increasing work efficiency.

[0054] Optionally, in one embodiment, the drive mechanism 20 is rotatably connected to the distal end of the insulating rod 10, and the drive mechanism 20 is capable of rotating about an axial direction perpendicular to the insulating rod 10. Exemplarily, the drive mechanism 20 can be rotatably connected to the distal end of the insulating rod 10 via a pivot or hinge. By rotating the drive mechanism 20, the angle between the pin positioning mechanism 30 and the screw positioning mechanism 40 can be adjusted, thereby ensuring that the screw positioning mechanism 40 can be accurately fixed onto the screw 90 that requires the replacement pin 80, and also ensuring that the pin 80 on the pin positioning mechanism 30 can be aligned with the pin hole on the screw 90.

[0055] See Figure 2 as well as Figure 3 Optionally, in one embodiment, the drive mechanism 20 includes a housing 21, a drive member 22, and a push rod 23. The housing 21 is connected to the distal end of the insulating rod 10, and the pin positioning mechanism 30 and the camera mechanism 50 are both mounted on the housing 21. The drive member 22 is disposed in the housing 21 and is electrically connected to the controller 60. One end of the push rod 23 is connected to the output shaft of the drive member 22, and the other end of the push rod 23 is used to abut against the pin 80. The push rod 23 is used to drive the pin 80 to disengage from the pin positioning mechanism 30 and insert it into the pin hole of the screw 90 under the drive of the drive member 22. Thus, by controlling the drive member 22 to extend the push rod 23 through the controller 60, the push rod 23 can push the pin 80 to disengage from the pin positioning mechanism 30 and insert it into the pin hole of the screw 90. For example, the drive member 22 can be a telescopic cylinder or an electric pusher.

[0056] See Figure 4 as well as Figure 5In one embodiment, the pin positioning mechanism 30 includes a bracket 31 and a clamping member 32, with the bracket 31 fixed to the housing 21. The clamping member 32 has a fixing hole 321 for accommodating the pin 80. The fixing hole 321 is disposed opposite to the push rod 23, which can be driven by the driving member 22 to pass into the fixing hole 321 to push out the pin 80 in the fixing hole 321.

[0057] For example, the bracket 31 includes a column and a crossbar, the column and the crossbar being connected in an L-shape. The crossbar has a through mounting groove, and the clamping member 32 is disposed in the mounting groove. Further, the clamping member 32 has a disc structure, with a fixing hole 321 through-hole formed in the center of the disc-shaped clamping member 32. Before re-installation, the pin 80 is inserted into the fixing hole 321 to initially fix the pin 80. During re-installation, the push rod 23 is driven by the driving member 22 to pass through the fixing hole 321, thereby pushing the pin 80 out of the fixing hole 321 and into the pin hole of the screw 90.

[0058] See Figure 5 In one embodiment, the fixing hole 321 is an elongated hole, the clamping member 32 is rotatably connected to the bracket 31, the clamping member 32 has a fixed position for fixing the pin 80 and a clearance position for the pin 80 to pass through; the pin positioning mechanism 30 also includes a connecting rod assembly 33, the connecting rod assembly 33 is connected to the clamping member 32 and cooperates with the push rod 23, the connecting rod assembly 33 can drive the clamping member 32 to rotate from the fixed position to the clearance position under the drive of the push rod 23.

[0059] Specifically, in this embodiment, the pin 80 is a cotter pin, comprising a body and a tail end. The width of the tail end is greater than the width of the body. When the clamping member 32 fixes the pin 80, the body is inserted into the fixing hole 321, and the width of the tail end is greater than the width of the fixing hole 321 but less than the length of the fixing hole 321. When the clamping member 32 is in the fixed position, the length direction of the fixing hole 321 intersects with the width direction of the tail end of the pin 80, for example, perpendicularly. At this time, the tail end of the pin 80 cannot pass through the fixing hole 321, and the pin 80 is limited in the fixing hole 321, thereby preventing the pin 80 from falling off during the process of the distal end of the insulating rod 10 extending towards the screw 90. After the screw positioning mechanism 40 holds the screw 90, the push rod 23, driven by the drive member 22, pushes the pin 80 into the pin hole of the screw 90. During this process, the push rod 23 drives the connecting rod assembly 33, which in turn drives the clamping member 32 to rotate to the clearance position, so that the length direction of the elongated hole is consistent with the width direction of the tail end of the pin 80. At this time, the tail end of the pin 80 can pass smoothly through the fixing hole 321, ensuring that the pin 80 can be disengaged from the clamping member 32 and inserted into the pin hole of the screw 90.

[0060] See also Figures 2 to 5In one embodiment, the linkage assembly 33 includes a pressure block 331, a slide rod 332, a connecting rod 333, and a swing rod 334. The pressure block 331 is connected to the push rod 23 and can move synchronously with the push rod 23. The pressure block 331 has an inclined surface. The slide rod 332 is axially movable and passes through the bracket 31. One end of the slide rod 332 contacts and engages with the inclined surface. One end of the connecting rod 333 is fixedly connected to the slide rod 332. One end of the swing rod 334 is rotatably connected to the connecting rod 333, and the other end of the swing rod 334 is rotatably connected to the clamping member 32.

[0061] Specifically, when the push rod 23 pushes the pin 80 toward the pin hole of the screw 90 under the drive of the drive member 22, the pressure block 331 moves synchronously, so that the inclined surface of the pressure block 331 presses the slide rod 332. The slide rod 332 moves laterally away from the push rod 23 and drives the connecting rod 333 to move synchronously. When the connecting rod 333 moves laterally away from the push rod 23, it will drive the swing rod 334 to swing, which in turn drives the clamping member 32 to rotate. Finally, the clamping member 32 rotates to the avoidance position as the push rod 23 moves, so as to ensure that the tail end of the pin 80 passes smoothly out of the fixing hole 321.

[0062] See Figure 2 In one embodiment, a positioning sensor 34 is also provided on the bracket 31. The positioning sensor 34 is communicatively connected to the drive component 22. The pressure block 331 abuts against the positioning sensor 34, and the positioning sensor 34 controls the drive component 22 to stop driving the push rod 23. Specifically, the position of the positioning sensor 34 is reasonably arranged according to the required insertion depth of the push rod 23 into the pin hole, so as to ensure that when the push rod 23 pushes the pin 80 to the preset position under the drive of the drive component 22, the pressure block 331 can touch the positioning sensor 34, thereby controlling the drive component 22 to stop driving the push rod 23, thus preventing the push rod 23 from extending beyond its travel range and ensuring that the pin 80 is accurately inserted into the position.

[0063] See Figure 3 The screw positioning mechanism 40 includes a fixing clamp 41, one end of which is connected to the bracket 31. The fixing clamp 41 has a fixing groove 411 for the screw 90 to pass through and for fixing the screw 90. The fixing groove 411 has a relief groove 412 on the side wall away from the bracket 31 for avoiding the pin 80. The relief groove 412 is arranged opposite to the fixing hole 321.

[0064] For example, the fixing clip 41 has an overall U-shaped structure. The fixing clip 41 includes an open end and a closed end that are arranged opposite to each other. The open end of the fixing clip 41 is fixed to the bracket 31. When the pin 80 is installed, the screw 90 is inserted into the fixing groove 411 and abuts against the groove wall of the fixing groove 411 near the fixing end, thereby fixing the screw 90 and preventing the screw 90 from shaking during the process of the pin 80 being inserted into the pin hole of the screw 90. Furthermore, by providing a relief groove 412 on the groove wall of the fixing groove 411 away from the bracket 31, when one end of the pin 80 passes through the pin hole, it can enter the relief groove 412, avoiding being blocked by the groove wall of the fixing groove 411, ensuring that the pin 80 can be inserted into place.

[0065] See Figure 1 In one embodiment, the side wall of the insulating rod 10 is provided with a hook 11, which is used to attach to the conductor of the transmission line. Specifically, during the replacement of the pin 80, the UHVDC pin replacement tool can be attached to the conductor by using the hook 11, thereby making the operation more labor-saving.

[0066] Optionally, in one embodiment, the insulating rod 10 includes multiple sub-rods, which are detachably connected. This allows the number of sub-rods to be inserted to be adjusted according to the distance of the screws 90 requiring additional pins 80, thereby adjusting the length of the insulating rod 10 for ease of operation. In another embodiment, the insulating rod 10 can also be a telescopic rod, allowing its length to be flexibly adjusted through telescopic operation to accommodate screws 90 requiring additional pins 80 at different distances.

[0067] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A tool for replacing pins in ultra-high voltage direct current lines, characterized in that, include: An insulating rod having a distal end and a proximal end arranged opposite to each other. A drive mechanism is disposed at the distal end of the insulating rod; A pin positioning mechanism is provided on the drive mechanism and is used to hold a pin. A screw positioning mechanism, which is connected to the pin positioning mechanism, is used to hold the screw. A camera mechanism is mounted on the drive mechanism and is used to acquire an image of a screw that is fixed to the screw positioning mechanism. A controller is disposed near the end of the insulating rod and is communicatively connected to the drive mechanism. The controller is used to control the drive mechanism so that the drive mechanism drives the pin to disengage from the pin positioning mechanism and insert it into the pin hole of the screw. A display is disposed near the end of the insulating rod, the display is communicatively connected to the camera mechanism, and the display is used to display images acquired by the camera mechanism; The drive mechanism includes: The housing is connected to the far end of the insulating rod, and both the pin positioning mechanism and the camera mechanism are mounted on the housing. A driving component, which is disposed in the housing and electrically connected to the controller; A push rod, one end of which is connected to the output shaft of the drive component, and the other end of which is used to engage with the pin. The push rod is used to drive the pin away from the pin positioning mechanism and insert it into the pin hole of the screw under the drive of the drive component. The pin positioning mechanism includes: A bracket, which is fixed to the housing; A clamping member is provided with a fixing hole for accommodating the pin. The fixing hole is disposed opposite to the push rod. The push rod can be driven by the driving member to pass through the fixing hole to push out the pin in the fixing hole. The fixing hole is an elongated hole, the clamping member is rotatably connected to the bracket, and the clamping member has a fixing position for fixing the pin and a clearance position for the pin to pass through. The pin positioning mechanism also includes a linkage assembly, which is connected to the clamping member and cooperates with the push rod. The linkage assembly can drive the clamping member to rotate from a fixed position to an avoidance position under the drive of the push rod. The linkage assembly includes: A pressure block, which is connected to the push rod and can move synchronously with the push rod, has an inclined surface; A sliding rod, which is axially movable and passes through the bracket, with one end of the sliding rod contacting and engaging with the inclined surface; A connecting rod, one end of which is fixedly connected to the sliding rod; A swing arm, one end of which is rotatably connected to the connecting rod, and the other end of which is rotatably connected to the clamping member.

2. The UHVDC line pin replacement tool according to claim 1, characterized in that, The drive mechanism is rotatably connected to the distal end of the insulating rod, and the drive mechanism is capable of rotating about an axial direction perpendicular to the insulating rod.

3. The UHVDC line pin replacement tool according to claim 1, characterized in that, The bracket is also equipped with a positioning sensor, which is communicatively connected to the drive component. When the pressure block abuts against the positioning sensor, the positioning sensor controls the drive component to stop driving the push rod.

4. The UHVDC line pin replacement tool according to claim 1, characterized in that, The screw positioning mechanism includes a fixing clamp, one end of which is connected to the bracket. The fixing clamp has a fixing groove for the screw to pass through and for fixing the screw. The fixing groove has a relief groove on the side wall away from the bracket for avoiding the pin. The relief groove is arranged opposite to the fixing hole.

5. The UHVDC line pin replacement tool according to claim 1, characterized in that, The insulating rod is provided with hooks on its side wall, which are used to attach to the conductors of the power transmission line.

6. The UHVDC line pin replacement tool according to claim 1, characterized in that, The insulating rod comprises multiple sub-rods, which are detachably connected to each other.

7. The UHVDC line pin replacement tool according to claim 1, characterized in that, The insulating rod is a telescopic rod.

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