Power cable protection device

Abstract

The invention relates to the technical field of power cables, and discloses a power cable protection device which comprises a protection sleeve, two lock catch structures and a hoop assembly, the two lock catch structures are installed at the axial ends of the protection sleeve respectively, and the hoop assembly is arranged in the axial middle of the protection sleeve in a hooping mode; the protective sleeve is made of a flexible material and comprises two arc-shaped protective sheets which are connected in a buckling manner; the lock catch structure comprises a main shell, an upper cover plate and a locking block, the main shell is detachably connected with the upper cover plate, a through groove is formed between the main shell and the upper cover plate, and the main shell and the upper cover plate are matched with the two arc-shaped protection pieces in a radial buckling and pressing mode. The locking block is movably installed in the main shell, the locking block is arranged in an obliquely upward moving mode in the direction that the power cable retreats from the lock catch structure, and an elastic piece is further arranged between the locking block and the main shell. The locking block is provided with a first tooth part, the upper cover plate is provided with a second tooth part, and the first tooth part and the second tooth part are used for being in radial extrusion fit with an insulating layer of the power cable so as to play a retaining role on the power cable.

Description

Technical Field

[0001] The present invention relates to the technical field of power cables, and in particular to a power cable protection device. Background Art

[0002] With the rapid development of my country's economy, power safety is an important cornerstone for protecting people's lives and industrial production. Power cables are used to transmit and distribute electrical energy. Whether it is an overhead wire or an underground line, long-term operation will lead to aging and damage of the insulation layer.

[0003] For example, a Chinese utility model patent with authorization announcement number CN217406103U and authorization announcement date 2022.09.09 discloses a line protection structure for power transmission and distribution, which specifically includes an electric wire, and a protective device is provided on the arc surface of the electric wire. The protective device includes two arc plates, and the two arc plates are fixedly connected to the electric wire. The two arc plates are internally rotatably connected with a rotating roller, and the arc surface of the rotating roller is sleeved with a spring, and both ends of the spring are fixedly connected to the two arc plates, and one end of the two arc plates is fixedly connected with an additional block, and the internal thread of the additional block is connected with a first bolt, and one end of the first bolt is rotatably connected with an extrusion block, and the extrusion block is slidably connected to the additional block, and the additional block is internally slidably connected with an extrusion column.

[0004] The existing line protection structure for power transmission and distribution uses an extrusion column to drive the protection pad to squeeze the wire, fix the protection device to the wire, and thus protect the insulation layer of the wire. However, the force contact area between the extrusion column and the wire is small, and the protection device is prone to slippage and displacement, which cannot effectively strengthen the protection of the wire locally, and can be flexibly bent and deformed according to actual needs. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the force contact area between the extrusion column and the wire of the existing power transmission and distribution line protection structure is small, the protection device is prone to slippage and displacement, and it is impossible to effectively strengthen the protection of the local part of the wire, while being able to flexibly bend and deform according to actual needs.

[0006] In order to solve the above technical problems, the present invention provides a technical solution for a power cable protection device: The power cable protection device comprises a protection sleeve, two locking structures and a clamp assembly, wherein the two locking structures are respectively installed at the axial ends of the protection sleeve, and the clamp assembly is tightly arranged at the axial middle part of the protection sleeve; The protective sleeve is made of a flexible material, and includes two arc-shaped protective sheets, which are buckled and connected to form a protective channel for the power cable to pass through, and the arc-shaped protective sheets are used to wrap and cooperate with the insulation layer of the power cable; The lock structure comprises a main housing, an upper cover plate and a locking block, wherein the main housing is detachably connected to the upper cover plate, a through groove communicating with the protection channel is provided between the main housing and the upper cover plate, and the main housing, the upper cover plate and the two arc-shaped protection sheets are radially buckled and pressed together; The locking block is movably installed in the main housing, and the locking block is arranged to move obliquely upward along the direction in which the power cable exits the locking structure, and an elastic member is also provided between the locking block and the main housing; The locking block is provided with a first tooth portion on a side close to the upper cover plate, and the upper cover plate is provided with a second tooth portion on a side close to the main shell. The first tooth portion and the second tooth portion are used to radially squeeze and cooperate with the insulating layer of the power cable to produce a stopping effect on the power cable.

[0007] Furthermore, the first tooth portion has the same structure as the second tooth portion, and the first tooth portion includes a plurality of helical teeth arranged in sequence along the axial direction, and the helical teeth have a stop surface and a guide surface, the stop surface is parallel to the radial plane of the through groove, and the guide surface extends obliquely downward along the direction in which the power cable exits the locking structure, and the stop surface intersects with the guide surface to form an extrusion end.

[0008] Furthermore, a guide groove is provided on the inner side wall of the main shell, and the guide groove is extended obliquely upward along the direction in which the power cable exits the locking structure. Slide blocks are provided on both sides of the locking block, and the two slide blocks are respectively slidably matched with the corresponding guide grooves.

[0009] Furthermore, the locking structure also includes a sliding seat, which is movably installed in the main shell, the locking block is movably fitted with the sliding seat, and the elastic member is a cylindrical compression spring installed between the locking block and the sliding seat.

[0010] Furthermore, a lower ear plate is provided at the end of the main shell, and an upper ear plate is provided at the end of the upper cover plate. The upper ear plate and the lower ear plate are buckled together and wrapped and connected with the protective sleeve; a first protrusion is provided on the inner side of the lower ear plate and the inner side of the upper ear plate, and a first hole is opened at the end of the arc-shaped protective sheet, and the first protrusion is plugged into and matched with the first hole.

[0011] Further, the clamp assembly includes a first C-shaped clamp and a second C-shaped clamp, the first C-shaped clamp is installed on the outer side of the two arc-shaped protective sheets with its opening facing downward, and the second C-shaped clamp is installed on the outer side of the first C-shaped clamp with its opening facing upward; The inner sides of the first C-shaped clamp and the second C-shaped clamp are both provided with second convex parts, the arc-shaped protective sheet is provided with a second hole, and the second convex part is plug-fitted with the second hole.

[0012] Furthermore, a plurality of first ridges are provided on the outer side of the first C-shaped clamp, the length direction of the first ridges is parallel to the axial direction, and the protruding direction of the first ridges extends obliquely outwards away from the opening direction of the first C-shaped clamp; A plurality of second ridges are provided on the inner side of the second C-shaped clamp, the length direction of the second ridges is parallel to the axial arrangement, and the protruding direction of the second ridges extends inwardly along the opening direction away from the second C-shaped clamp, and the first ridges are engaged with the second ridges.

[0013] Furthermore, the arc-shaped protective sheet has a double-wall structure, and an interlayer cavity is formed inside the arc-shaped protective sheet. An axial edge of one arc-shaped protective sheet is provided with a hook, and an axial edge of the other arc-shaped protective sheet is provided with a slot, and the hook is plugged into the slot.

[0014] Furthermore, a stop portion is provided on the inner edge of the slot, and the stop portion cooperates with the hook. A third convex portion is also provided on the outer edge of the slot. A groove is provided on the side of the arc-shaped protective sheet close to the hook, and the third convex portion cooperates with the groove.

[0015] Furthermore, the arc-shaped protective sheet is made of a mixture of nylon, polyoxymethylene and flame retardant components.

[0016] Compared with the prior art, the power cable protection device of the present invention has the following beneficial effects: the power cable protection device adopts a design form of a protective sleeve, two locking structures and a clamp assembly, the two locking structures are respectively installed at the axial ends of the protective sleeve, the clamp assembly is tightly arranged in the axial middle of the protective sleeve, and the protective sleeve includes two arc-shaped protective sheets, which are buckled and assembled on the outside of the power cable when in use, and the arc-shaped protective sheets play a role of wrapping and protecting the insulation layer of the power cable. The two locking structures are fixed at the axial ends, and the clamp assembly is fixed in the axial middle, thereby playing a reliable fixing method for the two ends and the middle of the protective sleeve.

[0017] The lock structure includes a main housing, an upper cover plate and a locking block. The main housing is detachably connected to the upper cover plate, and a through groove connecting the protection channel is provided between the main housing and the upper cover plate. Since the through groove between the main housing and the upper cover plate is connected to the protection channel of the protective sleeve, and the main housing, the upper cover plate and the two arc-shaped protective sheets are radially pressed together. After the protective sleeve is installed in place, the upper cover plate and the main housing are buckled on the axial end of the protective sleeve to ensure continuous protection of the power cable.

[0018] The locking block is movably installed in the main housing, and is arranged to move obliquely upward along the direction in which the power cable exits the lock structure. An elastic member is also arranged between the locking block and the main housing, and the locking block is provided with a first tooth portion near the upper cover plate, and the upper cover plate is provided with a second tooth portion near the main housing. The power cable is in the channel, and the insulating layer of the power cable is radially squeezed by the first tooth portion and the second tooth portion, and the radial squeezing force can be converted into an axial friction force. When the power cable exits from the lock structure, the locking block can be driven to move obliquely upward along the exit direction, that is, the locking block generates a gradually increasing radial squeezing force on the power cable, thereby playing a more stable anti-retreat effect.

[0019] It is precisely because the lock structure of the power cable protection device is designed with a locking block that can automatically stop retreating, and the first tooth part and the second tooth part can achieve a stable stop retreating effect by squeezing and rubbing against the power cable, which avoids the problem of the protection device being prone to slipping and displacement, and ensures that the power cable is effectively protected locally. In addition, the protective sleeve is made of flexible material, which can not only wrap and protect the power cable, but also bend and deform flexibly according to actual needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a front view schematic diagram of a power cable protection device in an embodiment of the present invention; Figure 2 is an axial cross-sectional view of a locking structure of a power cable protection device and a power cable in an embodiment of the present invention; Figure 3 is a partial stereoscopic diagram of a power cable protection device according to an embodiment of the present invention; Figure 4 is a radial cross-sectional view of the power cable protection device at the clamp assembly in an embodiment of the present invention; In the figure: 1-protective sleeve, 10-protective channel, 11-arc-shaped protective sheet, 111-first hole, 112-second hole, 12-hook, 13-slot, 14-stop portion, 15-third convex portion, 16-groove, 2-locking structure, 20-through slot, 21-main shell, 210-first tooth portion, 211-oblique tooth, 212-retractable surface, 213-guide surface, 214-guide groove, 22-upper cover, 220-second tooth portion, 23-locking block, 24-elastic member, 25-sliding seat, 26-lower ear plate, 260-first convex portion, 27-upper ear plate, 3-clamp assembly, 31-first C-shaped clamp, 32-second C-shaped clamp, 310-second convex portion, 311-first convex ridge, 321-second convex ridge, 4-power cable. DETAILED DESCRIPTION

[0021] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] like Figures 1 to 4 As shown, a power cable protection device of an embodiment of the present invention includes a protective sleeve 1, two locking structures 2 and a clamp assembly 3, the two locking structures 2 are respectively installed at the axial ends of the protective sleeve 1, and the clamp assembly 3 is tightly arranged in the axial middle part of the protective sleeve 1; the protective sleeve 1 is made of flexible material, and includes two arc-shaped protective sheets 11, the two arc-shaped protective sheets 11 are buckled and connected to form a protection channel 10 for the power cable 4 to pass through, and the arc-shaped protective sheets 11 are used to cooperate with the insulation layer of the power cable 4.

[0026] The locking structure 2 includes a main shell 21, an upper cover plate 22 and a locking block 23. The main shell 21 and the upper cover plate 22 are detachably connected. A through groove 20 connecting the protection channel 10 is provided between the main shell 21 and the upper cover plate 22, and the main shell 21, the upper cover plate 22 and the two arc-shaped protective sheets 11 are radially pressed together; the locking block 23 is movably installed in the main shell 21, and the locking block 23 is arranged to move obliquely upward along the direction in which the power cable 4 exits the locking structure 2, and an elastic member 24 is also provided between the locking block 23 and the main shell 21.

[0027] A first tooth portion 210 is provided on one side of the locking block 23 close to the upper cover plate 22 , and a second tooth portion 220 is provided on one side of the upper cover plate 22 close to the main shell 21 . The first tooth portion 210 and the second tooth portion 220 are used to radially extrude and cooperate with the insulating layer of the power cable 4 to prevent the power cable 4 from retreating.

[0028] The power cable protection device adopts the design form of a protective sleeve 1, two locking structures 2 and a clamp assembly 3. The two locking structures 2 are respectively installed at the axial ends of the protective sleeve 1, and the clamp assembly 3 is tightly set in the axial middle of the protective sleeve 1. In addition, the protective sleeve 1 includes two arc-shaped protective sheets 11. When in use, the two arc-shaped protective sheets 11 are buckled and assembled on the outside of the power cable 4, and the arc-shaped protective sheets 11 play a role of wrapping and protecting the insulation layer of the power cable 4. Combined with the two locking structures 2 fixed at the axial ends, the clamp assembly 3 is fixed in the axial middle, so that the two ends + middle of the protective sleeve 1 are reliably fixed.

[0029] The locking structure 2 includes a main housing 21, an upper cover plate 22 and a locking block 23. The main housing 21 and the upper cover plate 22 are detachably connected, and a through groove 20 communicating with the protection channel 10 is provided between the main housing 21 and the upper cover plate 22. Since the through groove 20 between the main housing 21 and the upper cover plate 22 is connected with the protection channel 10 of the protective sleeve 1, and the main housing 21, the upper cover plate 22 and the two arc-shaped protective sheets 11 are radially buckled and fitted. After the protective sleeve 1 is installed in place, the upper cover plate 22 and the main housing 21 are buckled at the axial end of the protective sleeve 1 to ensure continuous protection of the power cable 4.

[0030] The locking block 23 is movably installed in the main housing 21. The locking block 23 is arranged to move obliquely upward along the direction in which the power cable 4 exits the locking structure 2. An elastic member 24 is also arranged between the locking block 23 and the main housing 21. The locking block 23 is provided with a first tooth portion 210 near the upper cover plate 22, and the upper cover plate 22 is provided with a second tooth portion 220 near the main housing 21. The power cable 4 is in the channel 20, and the insulating layer of the power cable 4 is radially squeezed by the first tooth portion 210 and the second tooth portion 220. The radial squeezing force can be converted into an axial friction force. When the power cable 4 exits from the locking structure 2, the locking block 23 can be driven to move obliquely upward along the exit direction, that is, the locking block 23 generates a gradually increasing radial squeezing force on the power cable 4, thereby playing a more stable anti-retreat effect.

[0031] It is precisely because the lock structure 2 of the power cable protection device is designed with a locking block 23 that can automatically stop retreating, and the first tooth portion 210 and the second tooth portion 220 respectively squeeze and rub against the power cable 4 to achieve a stable stop retreat effect, avoiding the problem of the protection device being prone to slippage and displacement, ensuring effective and enhanced protection of the power cable 4. In addition, the protective sleeve 1 is made of flexible material, which can not only wrap and protect the power cable 4, but also bend and deform flexibly according to actual needs.

[0032] In this embodiment, the first tooth portion 210 and the second tooth portion 220 have the same structure. The first tooth portion 210 includes a plurality of helical teeth 211 arranged in sequence along the axial direction. The helical teeth 211 have a stop surface 212 and a guide surface 213. The stop surface 212 is parallel to the radial plane of the through slot 20. The guide surface 213 extends obliquely downward along the direction in which the power cable 4 exits the lock structure 2. The stop surface 212 intersects with the guide surface 213 to form an extrusion end. When the power cable 4 enters the lock structure 2, the guide surface 213 of the helical teeth 211 can allow the power cable 4 to slide smoothly, making it convenient to accurately install the lock structure 2 in place; conversely, when the power cable 4 exits the lock structure 2, the stop surface 212 of the helical teeth 211 can block the power cable 4, increasing the difficulty of the power cable 4 slipping outward. Combined with the moving direction of the locking block 23, the purpose of one-way locking that becomes tighter and tighter is achieved.

[0033] Specifically, the inner wall of the main housing 21 is provided with a guide groove 214, which extends obliquely upward along the direction in which the power cable 4 exits the lock structure 2, and sliders are provided on both sides of the locking block 23, and the two sliders are respectively slidably matched with the corresponding guide grooves 214. The two sliders are slidably matched with the guide grooves 214 of the main housing 21, so that the moving path of the locking block 23 is accurate and reliable, thereby ensuring the anti-retraction effect of the power cable 4.

[0034] As a further preferred solution, the lock structure 2 further includes a sliding seat 25, which is movably installed in the main housing 21, the locking block 23 and the sliding seat 25 are movably fitted, and the elastic member 24 is a cylindrical compression spring installed between the locking block 23 and the sliding seat 25. The sliding seat 25 is axially movable and assembled in the main housing 21, and the locking block 23 can drive the sliding seat 25 and the elastic member 24 to move synchronously, and the elastic member 24 provides a stable radial extrusion force, so that the locking block 23 can always be effectively extruded and matched with the power cable 4.

[0035] It should be noted that a lower ear plate 26 is provided at the end of the main shell 21, and an upper ear plate 27 is provided at the end of the upper cover plate 22. The upper ear plate 27 and the lower ear plate 26 are buckled up and down and wrapped and connected with the protective sleeve 1; the inner side of the lower ear plate 26 and the inner side of the upper ear plate 27 are both provided with a first convex portion 260, and the end of the arc-shaped protective sheet 11 is provided with a first hole 111, and the first convex portion 260 is plugged and matched with the first hole 111. The lower ear plate 26 of the main shell 21 and the upper ear plate 27 of the upper cover plate 22 cooperate with each other, so that the axial end of the arc-shaped protective sheet 11 can be wrapped and fixed, and the first convex portion 260 of the lower ear plate 26 and the first convex portion 260 of the upper ear plate 27 are plugged and matched with the first hole 111 of the arc-shaped protective sheet 11, thereby playing the role of axial positioning connection.

[0036] In this embodiment, the clamp assembly 3 includes a first C-shaped clamp 31 and a second C-shaped clamp 32. The first C-shaped clamp 31 is installed on the outer side of the two arc-shaped protective sheets 11 with its opening facing downward, and the second C-shaped clamp 32 is installed on the outer side of the first C-shaped clamp 31 with its opening facing upward. The inner side of the first C-shaped clamp 31 and the inner side of the second C-shaped clamp 32 are both provided with a second convex portion 310. The arc-shaped protective sheet 11 is provided with a second hole 112, and the second convex portion 310 is plugged into the second hole 112. The first C-shaped clamp 31 and the second C-shaped clamp 32 are buckled up and down to ensure that the two arc-shaped protective sheets 11 can be tightened and fixed with a double layer. As a further preferred solution, a plurality of first ridges 311 are provided on the outer side of the first C-shaped clamp 31, the length direction of the first ridges 311 is arranged parallel to the axial direction, and the protruding direction of the first ridges 311 extends outwardly in an oblique direction away from the opening direction of the first C-shaped clamp 31; a plurality of second ridges 321 are provided on the inner side of the second C-shaped clamp 32, the length direction of the second ridges 321 is arranged parallel to the axial direction, and the protruding direction of the second ridges 321 extends inwardly in an oblique direction away from the opening direction of the second C-shaped clamp 32, and the first ridges 311 and the second ridges 321 are locked and matched. The second C-shaped clamp 32 is buckled on the outer side of the first C-shaped clamp 31, and the first ridges 311 and the second ridges 321 are locked and matched to prevent the two C-shaped clamps from being separated and falling off, ensuring a reliable radial tightening effect on the protective sleeve 1, and the assembly operation of the clamp assembly 3 is more convenient.

[0037] In addition, the arc-shaped protective sheet 11 is a double-wall structure, and an interlayer cavity is formed inside the arc-shaped protective sheet 11. A hook 12 is provided on the axial edge of one arc-shaped protective sheet 11, and a slot 13 is provided on the axial edge of the other arc-shaped protective sheet 11. The hook 12 is plugged into the slot 13. A stopper 14 is provided on the inner edge of the slot 13, and the stopper 14 is plugged into the hook 12. A third convex portion 15 is also provided on the outer edge of the slot 13. A groove 16 is provided on the side of the arc-shaped protective sheet 11 close to the hook 12, and the third convex portion 15 is concavely matched with the groove 16. By plugging and matching the hook 12 with the slot 13, the stopper 14 is plugged into the hook 12, and the third convex portion 15 is plugged into the groove 16, three matching relationships are formed in the axial joint of the two arc-shaped protective sheets 11, thereby improving the reliability of the buckled connection of the two arc-shaped protective sheets 11.

[0038] It should be noted that the arc-shaped protective sheet 11 is made of a mixture of nylon, polyformaldehyde and flame retardant components. It is light and strong, has good insulation properties, flame retardant properties and weather resistance. It can not only adapt to complex wiring environments such as cable bends, but also effectively prevent the occurrence and spread of fire along the power cable 4.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A power cable protection device, characterized in that: It comprises a protective sleeve (1), two locking structures (2) and a clamp assembly (3), wherein the two locking structures (2) are respectively mounted on the axial ends of the protective sleeve (1), and the clamp assembly (3) is clamped and arranged at the axial middle part of the protective sleeve (1); The protective sleeve (1) is made of a flexible material and comprises two arc-shaped protective sheets (11). The two arc-shaped protective sheets (11) are buckled and connected to form a protective channel (10) through which the power cable (4) passes, and the arc-shaped protective sheets (11) are used to wrap and cooperate with the insulating layer of the power cable (4); The locking structure (2) comprises a main shell (21), an upper cover plate (22) and a locking block (23); the main shell (21) and the upper cover plate (22) are detachably connected; a through groove (20) communicating with the protection channel (10) is provided between the main shell (21) and the upper cover plate (22); and the main shell (21), the upper cover plate (22) and the two arc-shaped protection sheets (11) are radially buckled and pressed together; The locking block (23) is movably installed in the main housing (21), and the locking block (23) is arranged to move obliquely upward along the direction in which the power cable (4) exits the locking structure (2), and an elastic member (24) is further provided between the locking block (23) and the main housing (21); A first tooth portion (210) is provided on a side of the locking block (23) close to the upper cover plate (22), and a second tooth portion (220) is provided on a side of the upper cover plate (22) close to the main housing (21), wherein the first tooth portion (210) and the second tooth portion (220) are used to radially press fit with an insulating layer of the power cable (4) to produce a stop effect on the power cable (4).

2. The power cable protection device according to claim 1, characterized in that: The first tooth portion (210) and the second tooth portion (220) have the same structure. The first tooth portion (210) comprises a plurality of oblique teeth (211) arranged in sequence along the axial direction. The oblique teeth (211) have a stop surface (212) and a guide surface (213). The stop surface (212) is parallel to a radial plane of the through slot (20). The guide surface (213) extends obliquely downward in a direction in which the power cable (4) exits the locking structure (2). The stop surface (212) and the guide surface (213) intersect to form an extrusion end.

3. The power cable protection device according to claim 2, characterized in that: A guide groove (214) is provided on the inner side wall of the main housing (21), and the guide groove (214) is arranged to extend obliquely upward along the direction in which the power cable (4) exits the locking structure (2). Slide blocks are provided on both sides of the locking block (23), and the two slide blocks are respectively slidably matched with the corresponding guide grooves (214).

4. The power cable protection device according to claim 3, characterized in that: The locking structure (2) further comprises a sliding seat (25), wherein the sliding seat (25) is movably mounted in the main housing (21), the locking block (23) and the sliding seat (25) are movably fitted together, and the elastic member (24) is a cylindrical compression spring mounted between the locking block (23) and the sliding seat (25).

5. The power cable protection device according to claim 1, characterized in that: A lower ear plate (26) is provided at the end of the main shell (21), and an upper ear plate (27) is provided at the end of the upper cover plate (22); the upper ear plate (27) and the lower ear plate (26) are buckled up and down and are wrapped and connected with the protective sleeve (1); The inner sides of the lower ear plate (26) and the upper ear plate (27) are both provided with a first convex portion (260), the end of the arc-shaped protective sheet (11) is provided with a first hole (111), and the first convex portion (260) is plugged into and matched with the first hole (111).

6. The power cable protection device according to claim 1, characterized in that: The clamp assembly (3) comprises a first C-shaped clamp (31) and a second C-shaped clamp (32); the first C-shaped clamp (31) is installed on the outer sides of the two arc-shaped protective sheets (11) with its opening facing downward, and the second C-shaped clamp (32) is installed on the outer sides of the first C-shaped clamp (31) with its opening facing upward; A second convex portion (310) is provided on the inner side of the first C-shaped clamp (31) and the inner side of the second C-shaped clamp (32), a second hole (112) is provided on the arc-shaped protective sheet (11), and the second convex portion (310) is plug-fitted into the second hole (112).

7. The power cable protection device according to claim 6, characterized in that: A plurality of first ridges (311) are provided on the outer side of the first C-shaped clamp (31), the length direction of the first ridges (311) being arranged parallel to the axial direction, and the protruding direction of the first ridges (311) extending obliquely outwards in a direction away from the opening of the first C-shaped clamp (31); A plurality of second ridges (321) are provided on the inner side of the second C-shaped clamp (32); the length direction of the second ridges (321) is arranged parallel to the axial direction, and the protruding direction of the second ridges (321) extends obliquely inwardly away from the opening direction of the second C-shaped clamp (32); the first ridges (311) and the second ridges (321) are locked and matched.

8. The power cable protection device according to claim 1, characterized in that: The arc-shaped protective sheet (11) is of a double-wall structure, an interlayer cavity is formed inside the arc-shaped protective sheet (11), a hook (12) is provided on the axial edge of one arc-shaped protective sheet (11), and a slot (13) is provided on the axial edge of the other arc-shaped protective sheet (11), the hook (12) and the slot (13) being plugged into each other.

9. The power cable protection device according to claim 8, characterized in that: The inner edge of the card slot (13) is provided with a stop portion (14), the stop portion (14) and the hook (12) being stop-matched, the outer edge of the card slot (13) is also provided with a third convex portion (15), the arc-shaped protective sheet (11) is provided with a groove (16) on one side close to the hook (12), the third convex portion (15) and the groove (16) being concave-convexly matched.

10. The power cable protection device according to claim 1, characterized in that: The arc-shaped protective sheet (11) is made of a mixture of nylon, polyoxymethylene and flame retardant components.

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