Protective fitting for power cable

Abstract

The application belongs to the technical field of line installation, and discloses a protective fitting for power cable, which comprises a lower hanging plate, a first split pin is fixedly installed on the top of the lower hanging plate, a wire clamp mechanism for fixing a conductor is installed in the lower hanging plate, a longitudinal limiting mechanism for fixing the wire clamp mechanism is fixedly installed in the lower hanging plate, a connecting part for connecting a power tower is installed on the top of the lower hanging plate, the connecting part is connected with the first split pin below, and the longitudinal limiting mechanism is connected with the connecting part above. Through the above mode, automatic detection and classified collection of the milling cutter are realized, the problems that the conductor is prone to wear and tear and slipping under the long-term wind force or snow extrusion in the prior art are solved, and the problem that automatic dust removal cannot be achieved is solved.

Description

Technical Field

[0001] This invention relates to the field of line installation technology, and specifically to a protective fitting for power cables. Background Technology

[0002] Suspension clamps are among the most widely used and distributed electrical fittings in overhead transmission lines. They are used to fix conductors to insulator strings on straight-line towers, or to suspend lightning protection wires on straight-line towers. They can also be used to support transposed conductors on transposed towers and to fix jumpers on tension angle towers. Suspension clamps are a critical support point for conductors, needing to bear the entire load transmitted by the conductor. Currently, commonly used suspension clamps mainly include two categories: traditional U-bolt type boat-type clamps and prestressed suspension clamps.

[0003] CN119695757A discloses a power line fitting. This power line fitting has a lubrication part and an oil storage part. The lubrication part can automatically adjust the use of lubricating oil, which not only reduces wear between components and extends the service life of the suspension clamp, but also reduces the waste of lubricating oil. The external oil storage box makes it convenient for technicians to add lubricating oil, extending the service life of the suspension clamp and reducing the cost of use.

[0004] However, the existing power line fittings still have the following defects: (1) Axial slippage of the conductor in the suspension clamp is an important cause of conductor wear and derailment accidents. In actual transmission lines, the forces on the conductor such as wind deflection, icing, and ice jumping may come from two opposite directions. The existing one-way self-locking structure not only fails when subjected to reverse force, but may even reduce the clamping force due to the reverse drive of the inclined plane, resulting in conductor slippage.

[0005] (2) Suspension clamps are exposed to the outdoor environment for a long time. Industrial dust, salt spray, sand and other pollutants in the air are easily attached to the surface of the clamp or seep into the structural gaps under the action of wind and gravity. Although the existing technology can dissipate heat by setting heat dissipation holes, use rainwater collection for cooling or add heat insulation coating for protection, it cannot use the working condition movement of the hardware itself to achieve active cleaning and auxiliary heat dissipation. Summary of the Invention

[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a protective fitting for power cables.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A protective fitting for power cables includes a lower mounting plate, wherein a first cotter pin is fixedly installed on the top of the lower mounting plate; The lower plate is equipped with a wire clamp mechanism for fixing the wires. A longitudinal limiting mechanism for fixing the wire clamp mechanism is fixedly installed inside the lower hanging plate; The top of the lower plate is equipped with a connecting part for connecting to the power pole tower. The lower part of the connecting part is connected to the first cotter pin, and the upper part of the longitudinal limiting mechanism is connected to the connecting part.

[0008] Furthermore, a mounting post and a fixing block are fixedly installed inside the lower hanging plate. The lower part of the wire clamp mechanism contacts the upper surface of the mounting post. An elastic limiting part is installed on the side of the lower hanging plate near the mounting post. The side of the wire clamp mechanism near the fixing block is connected to the elastic limiting part. The wire clamp mechanism includes an upper clamp body and a lower clamp body. The upper clamp body and the lower clamp body fit together vertically. A support frame is fixedly installed on both sides of the upper clamp body and the lower clamp body. The support frame of the lower clamp body overlaps the upper surface of the mounting post. The longitudinal limiting mechanism contacts the upper surface of the support frame of the upper clamp body. An elongated hole is opened on the surface of the support frame along the axial direction of the wire clamp mechanism. An adaptive clamping component for clamping the wire is installed above the upper clamp body and below the lower clamp body.

[0009] Furthermore, the longitudinal limiting mechanism includes a longitudinal limiting plate, a pressure plate, and bolts. Pressure plates are fixedly installed on both sides of the longitudinal limiting plate. The pressure plates overlap the surface of the support frame of the upper clamping body. Bolts are threadedly connected to the surface of the pressure plates. The bolts pass through the elongated holes of the upper and lower clamping bodies and are threadedly connected to the mounting column.

[0010] Furthermore, the bottom of the lower hanging plate and the lower surface of the longitudinal limiting plate are respectively provided with a lower wedge groove and an upper wedge groove, and the cross-section of the lower wedge groove and the upper wedge groove is an isosceles trapezoid.

[0011] Furthermore, the adaptive clamping assembly includes a wedge block, a second spring, a movable rod, a clamping block, and anti-slip teeth. The movable rod is fixedly installed between the clamping block and the wedge block. The cross-section of the wedge block is an isosceles trapezoid. The upper and lower sets of movable rods respectively penetrate the upper clamping body and the lower clamping body. The bottom of the lower clamping body contacts the surface of the lower hanging plate. The second spring is fixedly installed between the upper clamping body and the wedge block, as well as between the wire clamping mechanism and the wedge block. Anti-slip teeth are fixedly installed on the side of the clamping block closest to the wire. The inner walls of the lower wedge groove and the upper wedge groove slide in contact with the side of the wedge block away from the clamping block.

[0012] Furthermore, the elastic limiting part includes a movable block, a movable pin, and a first spring. The movable pin is fixedly installed on the side of the movable block away from the support frame. Both the upper and lower support frames can contact the surface of the movable block. The movable pin is slidably connected to the fixed block. The first spring is fixedly installed between the fixed block and the movable block.

[0013] Furthermore, the longitudinal limiting plate has a groove on its upper surface, the groove has an I-shaped cross-section, a mesh is provided at the center of the groove surface, the upper clamp has a through hole at the position corresponding to the mesh, and the two ends of the groove are open structures for discharging foreign objects.

[0014] Furthermore, the connecting part includes an upper mounting plate, a second cotter pin, a connecting rod, a slider, and a felt strip. The upper mounting plate is fixedly installed with a second cotter pin for connecting to the power pole tower. The upper mounting plate is rotatably connected to the surface of the first cotter pin. The upper mounting plate is hinged with a connecting rod. The end of the connecting rod away from the upper mounting plate is hinged with a slider. The slider is slidably connected in a groove. A felt strip for cleaning foreign objects from the mesh surface is fixedly installed below the slider.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention, through the coordinated arrangement of the lower hanging plate, wire clamp mechanism, longitudinal limiting mechanism and connecting part, not only solves the problem that the wire is prone to wear and slippage under long-term wind or snow pressure in the prior art, but also solves the problem of not being able to automatically clean dust.

[0016] 2. Through the setting of the wire clamp mechanism, the wedge block will slide along the lower and upper wedge grooves of the isosceles trapezoid regardless of whether the wire moves axially to the left or right. This will cause the clamping force of the anti-slip teeth on the wire to increase sharply, forming a self-locking mechanism, preventing the wire from slipping out of control, and ensuring that the wire will not be pulled out.

[0017] 3. Through the design of the connecting part, this invention not only has the traditional suspension support function, but also automatically removes foreign objects by controlling the slider and felt strip through the linkage when the wire deflects in the clamp due to wind force. The entire maintenance process does not require additional energy input or manual intervention, realizing a fully automatic and zero-energy automatic maintenance function. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0019] Figure 1 This is a perspective view of a protective fitting for power cables according to the present invention.

[0020] Figure 2 This is an exploded view of a protective fitting for power cables according to the present invention.

[0021] Figure 3 This is a perspective view of the lower mounting plate of the present invention.

[0022] Figure 4 This is a split schematic diagram of the wire clamp mechanism of the present invention.

[0023] Figure 5 This is a perspective view of the longitudinal limiting mechanism of the present invention.

[0024] Figure 6 This is a perspective view of the connecting portion of the present invention.

[0025] Figure 7 This is a top view showing the cooperation of the lower hanging plate, longitudinal limiting mechanism, and connecting part of the present invention.

[0026] Figure 8 For the present invention Figure 7 A magnified view of a portion of point a.

[0027] Figure 9 This is a top view of a protective fitting for power cables according to the present invention.

[0028] Figure 10 This is a cross-sectional view of a protective fitting for power cables according to the present invention.

[0029] Figure 11 For the present invention Figure 10 A magnified view of a section at point b.

[0030] The labels in the diagram represent: 1. Lower hanging plate; 11. Lower wedge groove; 12. First cotter pin; 13. Mounting post; 14. Elastic limiting part; 141. Movable block; 142. Movable pin; 143. First spring; 15. Fixed block; 2. Wire clamp mechanism; 21. Upper clamp body; 22. Lower clamp body; 23. Bearing frame; 24. Oblong hole; 25. Adaptive clamping assembly; 251. Wedge block; 252. Second spring; 253. Movable rod; 254. Clamping block; 255. Anti-slip teeth; 26. Through hole; 3. Longitudinal limiting plate; 31. Pressure plate; 32. Bolt; 33. Slide groove; 34. Mesh; 35. Upper wedge groove; 4. Upper hanging plate; 41. Second cotter pin; 42. Connecting rod; 43. Slider; 44. Felt strip; 5. Wire. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] Example 1: Please refer to the accompanying drawings in the instruction manual. Figures 1-11 A protective fitting for power cables includes a lower mounting plate 1, wherein a first cotter pin 12 is fixedly installed on the top of the lower mounting plate 1; The lower hanging plate 1 is equipped with a wire clamp mechanism 2 for fixing the wire 5; The lower hanging plate 1 is fixedly installed with a longitudinal limiting mechanism for fixing the wire clamp mechanism 2; The top of the lower plate 1 is equipped with a connecting part for connecting to the power pole tower. The lower part of the connecting part is connected to the first cotter pin 12, and the upper part of the longitudinal limiting mechanism is connected to the connecting part.

[0033] In this embodiment, when a protective fitting for power cables is working normally, the lower hanging plate 1 is installed on the power pole through the connecting part. The connecting part, as the load-bearing suspension component of the entire fitting, can transfer the load of the conductor 5 to the power pole. The wire clamp mechanism 2 is used to fix the conductor 5. The longitudinal limiting mechanism can prevent the wire clamp mechanism 2 from moving longitudinally when the conductor 5 moves horizontally under the influence of wind or the gravity of snow. It ensures that the wire clamp mechanism 2 can move synchronously with the conductor 5. The connection between the connecting part and the upper part of the longitudinal limiting mechanism can be used to clean the area above the longitudinal limiting mechanism.

[0034] Example 2: Figures 1-11 As shown, in a preferred embodiment of the present invention, a mounting post 13 and a fixing block 15 are fixedly installed inside the lower hanging plate 1. The lower part of the wire clamp mechanism 2 is in contact with the upper surface of the mounting post 13. An elastic limiting part 14 is installed on the side of the lower hanging plate 1 near the mounting post 13. The side of the wire clamp mechanism 2 near the fixing block 15 is connected to the elastic limiting part 14.

[0035] The wire clamp mechanism 2 includes an upper clamp body 21 and a lower clamp body 22. The upper clamp body 21 and the lower clamp body 22 are fitted together vertically. A support frame 23 is fixedly installed on both sides of the upper clamp body 21 and the lower clamp body 22. The support frame 23 of the lower clamp body 22 overlaps on the upper surface of the mounting column 13. The longitudinal limiting mechanism is in contact with the upper surface of the support frame 23 of the upper clamp body 21. An elongated hole 24 is opened on the surface of the support frame 23 along the axial direction of the wire clamp mechanism 2. An adaptive clamping component 25 for clamping the wire 5 is installed above the upper clamp body 21 and below the lower clamp body 22.

[0036] The longitudinal limiting mechanism includes a longitudinal limiting plate 3, a pressure plate 31, and bolts 32. Pressure plates 31 are fixedly installed on both sides of the longitudinal limiting plate 3. The pressure plates 31 overlap the surface of the support frame 23 of the upper clamping body 21. Bolts 32 are threadedly connected to the surface of the pressure plate 31. The bolts 32 pass through the elongated holes 24 of the upper clamping body 21 and the lower clamping body 22 and are threadedly connected to the mounting column 13.

[0037] The bottom of the lower hanging plate 1 and the lower surface of the longitudinal limiting plate 3 are respectively provided with a lower wedge groove 11 and an upper wedge groove 35, and the cross sections of the lower wedge groove 11 and the upper wedge groove 35 are both isosceles trapezoids.

[0038] The adaptive clamping assembly 25 includes a wedge block 251, a second spring 252, a movable rod 253, a clamping block 254, and anti-slip teeth 255. The movable rod 253 is fixedly installed between the clamping block 254 and the wedge block 251. The cross-section of the wedge block 251 is an isosceles trapezoid. The upper and lower sets of movable rods 253 respectively pass through the upper clamping body 21 and the lower clamping body 22. The bottom of the lower clamping body 22 contacts the surface of the lower hanging plate 1. The second spring 252 is fixedly installed between the upper clamping body 21 and the wedge block 251, and between the wire clamping mechanism 2 and the wedge block 251. The anti-slip teeth 255 are fixedly installed on the side of the clamping block 254 near the wire 5. The inner walls of the lower wedge groove 11 and the upper wedge groove 35 slide in contact with the side of the wedge block 251 away from the clamping block 254.

[0039] The elastic limiting part 14 includes a movable block 141, a movable pin 142, and a first spring 143. The movable pin 142 is fixedly installed on the side of the movable block 141 away from the support frame 23. Both the upper and lower support frames 23 can contact the surface of the movable block 141. The movable pin 142 is slidably connected to the fixed block 15. The first spring 143 is fixedly installed between the fixed block 15 and the movable block 141.

[0040] In this embodiment, by setting up the wire clamp mechanism 2, the worker first puts the wire 5 into the lower clamp 22 and attaches the support frame 23 of the lower clamp 22 to the mounting post 13. Then, the upper clamp 21 is installed above the lower clamp 22. Next, the longitudinal limiting plate 3 is installed above the upper clamp 21. Then, the bolt 32 is installed in the mounting post 13. The pressure plate 31 is attached to the support frame 23 of the upper clamp 21. The first spring 143 limits the support frame 23 horizontally through the movable block 141, so that the bolt 32 is distributed near the geometric center of the elongated hole 24. The purpose is to ensure that the wire clamp mechanism 2 can move back and forth or left and right in the horizontal direction.

[0041] In the initial state, the wire 5 located in the wire clamp mechanism 2 has wedge blocks 251 in several sets of adaptive clamping components 25 distributed in the middle position of the lower wedge groove 11 and the upper wedge groove 35. The adaptive clamping components 25 are pressed and fixed by anti-slip teeth 255.

[0042] When the conductor 5 tends to move horizontally under the influence of wind or the gravity of snow, this tendency can be transmitted to the clamp mechanism 2 via the wedge block 251. This causes the wedge block 251 to tend to move along the wedge surface on one side of the lower wedge groove 11 and the upper wedge groove 35. When the clamp mechanism 2 experiences horizontal displacement due to excessive wind or snow gravity, the first spring 143 and the movable block 141 act as elastic buffers, thereby reducing the impact force of the bearing frame 23 on the bolt 32. When the wedge block 251 moves along the wedge surface on either side of the lower wedge groove 11 and the upper wedge groove 35, the anti-slip teeth 255 on both sides will apply a greater clamping force to the conductor 5, thereby improving the firmness of the conductor 5 within the clamp mechanism 2. At this time, the second spring 252 and the first spring 143 are in a compressed state. When the wind or snow gravity disappears, the elastic deformation of the second spring 252 and the first spring 143 drives the clamp mechanism 2 and the anti-slip teeth 255 to reset.

[0043] Example 3: Figures 1-11 As shown, in a preferred embodiment of the present invention, the upper surface of the longitudinal limiting plate 3 is provided with a sliding groove 33, the cross section of the sliding groove 33 is I-shaped, a mesh 34 is provided at the center of the surface of the sliding groove 33, and a through hole 26 is provided at the position corresponding to the mesh 34 on the upper clamp 21. The two ends of the sliding groove 33 are open structures for discharging foreign objects.

[0044] The connecting part includes an upper hanging plate 4, a second cotter pin 41, a connecting rod 42, a slider 43, and a felt strip 44. The upper hanging plate 4 is fixedly installed with the second cotter pin 41 for connecting to the power pole tower. The upper hanging plate 4 serves as a suspension support. The upper hanging plate 4 is rotatably connected to the surface of the first cotter pin 12 below. The connecting rod 42 is hinged to the lower part of the upper hanging plate 4. The slider 43 is hinged to the end of the connecting rod 42 away from the upper hanging plate 4. The slider 43 is slidably connected in the slide groove 33. The felt strip 44 for cleaning foreign objects on the surface of the mesh 34 is fixedly installed below the slider 43. The cooperation structure between the slider 43 and the slide groove 33 is a dovetail groove and dovetail block structure, which guides the slider 43 to move linearly along the slide groove 33.

[0045] In this embodiment, part of the heat generated by the wire 5 is transferred to the wire clamp mechanism 2 indirectly through the adaptive clamping assembly 25, and another part is transferred directly to the air through the through hole 26. During rainy weather, rainwater directly enters the wire clamp mechanism 2 through the mesh 34 and the through hole 26, and is eventually discharged outwards from both ends of the wire clamp mechanism 2. The rainwater mainly serves to clean the dust inside the wire clamp mechanism 2, while the mesh 34 filters dust and other foreign matter from the air and rainwater. Under wind force, the wire clamp mechanism 2 and the lower hanging plate 1 are clamped together by the first cotter pin. When the axis of 12 deflects, the change in the angle of the connecting rod 42 drives the slider 43 to move horizontally back and forth along the slide groove 33. The reciprocating slider 43 cleans foreign objects from the surface of the mesh 34 through the felt strip 44. Small particles of foreign objects that are cleaned off directly enter the wire clamp mechanism 2, while large particles of foreign objects are cleaned to both ends of the slide groove 33. Since the two ends of the slide groove 33 are open drainage channels, the large particles of foreign objects that are cleaned here can easily fall off under the washing of wind and rain, thereby ensuring the sustainability of cleaning the dust inside the wire clamp mechanism 2 with rainwater.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A protective fitting for power cables, comprising a lower mounting plate (1), wherein a first cotter pin (12) is fixedly installed on the top of the lower mounting plate (1), characterized in that: The lower plate (1) is equipped with a wire clamp mechanism (2) for fixing the wire (5); The lower hanging plate (1) is fixedly installed with a longitudinal limiting mechanism for fixing the wire clamp mechanism (2); The top of the lower plate (1) is equipped with a connecting part for connecting to the power pole tower. The lower part of the connecting part is connected to the first cotter pin (12), and the upper part of the longitudinal limiting mechanism is connected to the connecting part.

2. The protective fittings for power cables according to claim 1, characterized in that, The lower hanging plate (1) is fixedly installed with a mounting post (13) and a fixing block (15). The lower part of the wire clamp mechanism (2) is in contact with the upper surface of the mounting post (13). An elastic limiting part (14) is installed on the side of the lower hanging plate (1) near the mounting post (13). The side of the wire clamp mechanism (2) near the fixing block (15) is connected to the elastic limiting part (14).

3. The protective fittings for power cables according to claim 2, characterized in that, The wire clamp mechanism (2) includes an upper clamp body (21) and a lower clamp body (22). The upper clamp body (21) and the lower clamp body (22) are fitted together vertically. A support frame (23) is fixedly installed on both sides of the upper clamp body (21) and the lower clamp body (22). The support frame (23) of the lower clamp body (22) overlaps on the upper surface of the mounting column (13). The longitudinal limiting mechanism is in contact with the upper surface of the support frame (23) of the upper clamp body (21). An elongated hole (24) is opened on the surface of the support frame (23) along the axial direction of the wire clamp mechanism (2). An adaptive clamping component (25) for clamping the wire (5) is installed above the upper clamp body (21) and below the lower clamp body (22).

4. The protective fittings for power cables according to claim 3, characterized in that, The longitudinal limiting mechanism includes a longitudinal limiting plate (3), a pressure plate (31), and bolts (32). Pressure plates (31) are fixedly installed on both sides of the longitudinal limiting plate (3). The pressure plates (31) overlap the upper surface of the support frame (23) of the upper clamping body (21). Bolts (32) are threadedly connected to the surface of the pressure plates (31). The bolts (32) pass through the elongated holes (24) of the upper clamping body (21) and the lower clamping body (22) and are threadedly connected to the mounting column (13).

5. The protective fitting for power cables according to claim 4, characterized in that, The bottom of the lower hanging plate (1) and the lower surface of the longitudinal limiting plate (3) are respectively provided with a lower wedge groove (11) and an upper wedge groove (35), and the cross sections of the lower wedge groove (11) and the upper wedge groove (35) are both isosceles trapezoids.

6. The protective fittings for power cables according to claim 5, characterized in that, The adaptive clamping assembly (25) includes a wedge block (251), a second spring (252), a movable rod (253), a clamping block (254), and anti-slip teeth (255). The movable rod (253) is fixedly installed between the clamping block (254) and the wedge block (251). The cross-section of the wedge block (251) is an isosceles trapezoid. The upper and lower sets of the movable rods (253) respectively penetrate the upper clamping body (21) and the lower clamping body (22). 22) The bottom contacts the surface of the lower hanging plate (1). A second spring (252) is fixedly installed between the upper clamp (21) and the wedge block (251) and between the wire clamp mechanism (2) and the wedge block (251). Anti-slip teeth (255) are fixedly installed on the side of the clamping block (254) near the wire (5). The inner walls of the lower wedge groove (11) and the upper wedge groove (35) slide in contact with the side of the wedge block (251) away from the clamping block (254).

7. The protective fitting for power cables according to claim 6, characterized in that, The elastic limiting part (14) includes a movable block (141), a movable pin (142), and a first spring (143). The movable pin (142) is fixedly installed on the side of the movable block (141) away from the support frame (23). Both the upper and lower support frames (23) can contact the surface of the movable block (141). The movable pin (142) is slidably connected to the fixed block (15). The first spring (143) is fixedly installed between the fixed block (15) and the movable block (141).

8. The protective fitting for power cables according to claim 7, characterized in that, The upper surface of the longitudinal limiting plate (3) is provided with a sliding groove (33), the cross section of the sliding groove (33) is I-shaped, a mesh hole (34) is provided at the center of the surface of the sliding groove (33), and a through hole (26) is provided at the position corresponding to the mesh hole (34) of the upper clamp (21). The two ends of the sliding groove (33) are open structures for discharging foreign objects.

9. The protective fittings for power cables according to claim 8, characterized in that, The connecting part includes an upper hanging plate (4), a second cotter pin (41), a connecting rod (42), a slider (43), and a felt strip (44). The upper hanging plate (4) is fixedly installed with a second cotter pin (41) for connecting power poles. The upper hanging plate (4) is rotatably connected to the surface of the first cotter pin (12) below. The upper hanging plate (4) is hinged with a connecting rod (42) below. The end of the connecting rod (42) away from the upper hanging plate (4) is hinged with a slider (43). The slider (43) is slidably connected in a groove (33). The slider (43) is fixedly installed with a felt strip (44) for cleaning foreign objects on the surface of the mesh (34) below.

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