A cable protection tube

Abstract

The application discloses a cable protection pipe and relates to the technical field of cable protection pipes, which comprises an outer cylinder assembly and a separation assembly arranged in the outer cylinder assembly, wherein the outer cylinder assembly comprises an outer pipe cylinder, and the end of the outer pipe cylinder is provided with a control assembly for controlling the separation assembly; the separation assembly comprises at least three separation units which are uniformly distributed along the circumference of the outer pipe cylinder; each separation unit comprises a main separation plate, a side separation plate and a positioning separation plate which are sequentially and circularly hinged; meanwhile, when the application is used, the three separation units which are uniformly distributed along the circumference are matched with the sequentially hinged structure of the main separation plate, the side separation plate and the positioning separation plate, so that the separation assembly can be switched between a folded storage state and an unfolded working state; when being folded, the pipe cavity is through; when being unfolded, three independent fan-shaped partitions are formed around the outer pipe cylinder, and an independent central accommodating cavity is formed in the center, so that the space limitation of the traditional fixed separation plate is broken.

Description

Technical Field

[0001] This invention relates to the field of cable protection pipe technology, specifically a cable protection pipe. Background Technology

[0002] In the fields of communication and power transmission, a single large-diameter protective conduit often needs to accommodate multiple cables to meet complex wiring requirements. Currently, the most common seven-core cable arrangement in the industry adopts a "2-3-2" honeycomb distribution, that is, one cable in the center surrounded by six cables. This traditional planar arrangement method has limitations in space utilization, and it is difficult to achieve rapid physical isolation when specific cables need to be inspected or replaced.

[0003] The following problems exist in the existing technology: 1. Existing cable protection pipes mostly use fixed partitions or simple pipe-in-pipe structures, which make it difficult to change the internal spatial shape once formed. This results in the pipe hole space often being statically allocated, making it impossible to dynamically adjust between "through-cavity" and "isolated-cavity" according to actual wiring needs, thus limiting the versatility of the protection pipes.

[0004] 2. Although some deployable partition structures have appeared in the existing technology, these structures do not have the ability to maintain their state after being deployed. They must be manually operated by locking pins, pressure rollers and other locking mechanisms to lock them point by point, which is cumbersome. Moreover, the locking mechanism has many parts and requires high precision. It is easy to loosen and fail in the long-term use environment of outdoor humidity and vibration, resulting in the partition state not being reliably maintained.

[0005] 3. When unfolding in situ with cables already installed inside the pipe, the partition plate is squeezed by the cables, resulting in high unfolding resistance. Existing unfoldable structures rely solely on external drive to complete the entire unfolding process, which can easily cause the partition plate to get stuck midway due to resistance and fail to reliably reach its final position. Furthermore, such structures lack any retention measures when retracted, and the partition components can easily pop out of the pipe wall during cable threading operations, scratching the cables.

[0006] 4. Existing partition plates typically have smooth surfaces or simple protrusions, which cannot effectively reduce friction between cables and partition plates, making long-distance cable laying difficult. At the same time, for independent cables in the center, existing structures cannot provide a stable, dedicated containment cavity with independent buffer space, making them susceptible to the stress of surrounding cables. Summary of the Invention

[0007] To address the shortcomings mentioned in the background section, the present invention aims to provide a cable protection pipe.

[0008] The objective of this invention can be achieved through the following technical solutions: A cable protection conduit includes an outer cylinder assembly and a partition assembly disposed within the outer cylinder assembly. The outer cylinder assembly includes an outer tube, and an operating component for controlling the partition assembly is installed at the end of the outer tube. The separation assembly includes at least three separation units, which are evenly distributed along the circumference of the outer tube. Each of the partition units includes a main partition plate, a side partition plate, and a positioning partition plate that are hinged together at the ends; The end of the positioning partition plate away from the side partition plate is hinged to the inner wall of the outer tube via a fixed hinge shaft. The main partition plate is hinged to a hinge pin at one end away from the side partition plate. The hinge pin can slide along the circumference of the outer tube and is connected to the control component for transmission. The outer tube has circumferentially circumferentially opened outer wall guide rails that correspond one-to-one with the partition unit, and each outer wall guide rail has a circumferential through hole. The control component includes a slider support that can slide along the outer wall guide rail. Each slider support corresponds to a partition unit. A hinge pin passes through a circumferential through hole and is fixedly connected to the slider support. The control component is also configured to drive all slider supports to slide synchronously along the outer wall guide rail. A bistable holding mechanism is provided between the inner wall of the outer tube and the positioning partition plate. The bistable holding mechanism acts on the position on the positioning partition plate that is off the axis of the fixed hinge, and is used to keep the partition assembly in a folded storage state or an unfolded working state. When the control component drives the hinge pin to move along the circumference of the outer tube, each partition unit swings through the hinge linkage of the main partition plate, side partition plate and positioning partition plate, so that the partition component switches between the folded storage state and the unfolded working state, so as to dynamically adjust the internal space shape of the outer tube. In the folded storage state, the main partition plate, side partition plate and positioning partition plate of all partition units are stacked and attached to each other and stored in the inner wall of the outer tube, so that the inside of the outer tube forms a through cavity, and the bistable holding mechanism keeps the partition components in the folded storage state. In the deployed working state, all partition units deploy synchronously, forming multiple independent sector-shaped partitions around the outer tube and enclosing an independent central receiving cavity in the center of the outer tube. The bistable holding mechanism keeps the partition components in the deployed working state.

[0009] Furthermore, the bistable holding mechanism is a bistable hinge assembly, which includes a hinge base, a bistable torsion spring, a torsion spring pressure plate, and a limiting block; The bottom end of the hinge seat is fixedly installed on the inner wall of the outer tube by fixing screws, and the fixed hinge shaft is installed on the hinge seat; one end of the bistable torsion spring is hooked to the hinge seat by a spring pin, and the torsion arm of the bistable torsion spring passes through the torsion spring pressure plate; the torsion spring pressure plate is connected to the positioning partition plate by a limiting block, and rotates synchronously with the positioning partition plate; when the positioning partition plate rotates, the torsion spring pressure plate drives the torsion arm of the bistable torsion spring to store or release energy, thereby realizing bistable switching.

[0010] Furthermore, in the deployed working state, the limit stop block swings with the positioning partition plate to the position where it abuts against the hinge seat. The torque of the bistable torsion spring acts on the limit stop block through the torsion spring pressure plate, pressing the positioning partition plate to maintain it in the deployed working state.

[0011] Furthermore, the bistable torsion springs are arranged in pairs, with the two bistable torsion springs symmetrically arranged on both sides of the positioning partition plate.

[0012] Furthermore, the bistable holding mechanism is configured such that during the transition of the partition component from the folded storage state to the unfolded working state, the line of action of the bistable holding mechanism crosses the axis of the fixed hinge in the middle of the sliding stroke of the slider support, and then releases the stored energy to drive the partition component to automatically unfold to the unfolded working state.

[0013] Furthermore, there are three dividing units, which are evenly distributed at 120° along the circumference of the outer tube. In the deployed working state, the three dividing units form three independent sector-shaped partitions on the periphery of the outer tube.

[0014] Furthermore, the inner wall of the outer tube is provided with a receiving groove for accommodating the dividing component in the folded state; when the dividing component is in the folded storage state, the side dividing plate and the positioning dividing plate are stacked and attached to each other, the outer surface of the main dividing plate is flush with the inner wall of the outer tube, and the entire dividing component is stored in the receiving groove.

[0015] Furthermore, a fixed gear ring is fixedly installed on the inner side of the end of the outer tube, and an outer wall guide rail is opened on the end side wall of the outer tube and evenly arranged along the circumference of the outer tube; a transmission gear is installed on the side of each slider support facing the fixed gear ring, and the transmission gear meshes with the fixed gear ring for transmission; the outer wall guide rail extends in a straight line along the circumference of the outer tube to limit the sliding trajectory of the slider support.

[0016] Furthermore, a first pulley plate is provided on the side of the main partition plate facing the inner space of the tube, and a second pulley plate is provided on the side of the side partition plate facing the inner space of the tube; the surfaces of the first pulley plate and the second pulley plate are arc-shaped, and a number of pulley balls arranged along the axial direction of the outer tube are embedded on the surface. The pulley balls rotate freely around their own axis to convert the sliding friction between the cable and the partition component into rolling friction.

[0017] Furthermore, the slider support is directly slidably mounted on the outer wall guide rail, and a friction-reducing pad or rollers are embedded between the contact surfaces of the slider support and the outer wall guide rail.

[0018] The beneficial effects of this invention are: 1. This invention uses three circumferentially evenly distributed partition units, in conjunction with the sequential hinged structure of the main partition plate, side partition plate and positioning partition plate, to enable the partition assembly to switch between a folded storage state and an unfolded working state: when folded, the cavity is unobstructed; when unfolded, three independent fan-shaped partitions are formed around the outer tube, and an independent central receiving cavity is formed in the center, thus breaking the spatial limitations of traditional fixed partitions and allowing the internal space shape to be dynamically adjusted according to the on-site wiring requirements.

[0019] 2. The present invention provides a bistable holding mechanism between the inner wall of the outer tube and the positioning partition plate. This mechanism acts on the eccentric position on the positioning partition plate that is off the axis of the fixed hinge shaft. It can maintain itself in both the folded storage state and the unfolded working state without any manual locking operation. Accordingly, locking mechanisms such as locking pins and eccentric pressure rollers are eliminated, reducing the number of parts, simplifying the operation steps, and eliminating the problem of loosening and failure of locking parts. The partition state can still remain stable in the long-term outdoor use environment.

[0020] 3. The bistable holding mechanism of the present invention is configured such that: during the process of the separator component switching from the folded storage state to the unfolded working state, its line of action crosses the axis of the fixed hinge shaft in the middle of the sliding stroke of the slider support. It stores energy in the first half of the stroke, releases energy after crossing the axis, and automatically drives the separator component to complete the final unfolding stroke. Even if the cable has been threaded in the tube and the unfolding resistance is large, the three separator units can be synchronously and reliably positioned under the drive of the holding mechanism to avoid jamming in the middle. At the same time, in the folded storage state, the bistable holding mechanism presses the separator component into the receiving groove to prevent it from popping out and scratching the cable during the threading operation.

[0021] 4. In this invention, a first pulley plate and a second pulley plate are respectively provided on the side of the main partition plate and the side partition plate facing the inner space of the tube. The sliding friction when the cable is pulled is converted into rolling friction by the pulley balls embedded in the plate surface, which greatly reduces the dragging resistance and reduces the wear of the cable sheath. At the same time, the independent central cavity formed by the central enclosure in the unfolded state can accommodate the core cable alone, providing an independent buffer space for the core cable, so that it is completely physically isolated from the outer cables, avoiding the force of the outer cables being transmitted to the core cable, and improving the protection reliability of the core cable. Attached Figure Description

[0022] The invention will now be further described with reference to the accompanying drawings.

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

[0024] Figure 2 yes Figure 1 Enlarged diagram of point A in the middle.

[0025] Figure 3 This is a schematic diagram of the outer cylinder assembly structure of the present invention.

[0026] Figure 4 yes Figure 3 Enlarged diagram of point B in the middle.

[0027] Figure 5 This is a schematic diagram of the control components of the present invention.

[0028] Figure 6 yes Figure 5 Enlarged diagram of point C in the middle.

[0029] Figure 7 This is a schematic diagram of the separator component structure of the present invention.

[0030] Figure 8 yes Figure 7 Enlarged diagram of point D in the middle.

[0031] Figure 9 This is a schematic diagram of the unfolded structure of the present invention.

[0032] Figure 10 This is a diagram showing the internal structure of the invention in its folded state.

[0033] In the diagram: 1. Outer cylinder assembly; 11. Outer tube; 12. Fixed gear ring; 13. Receiving groove; 14. Outer wall guide rail; 15. Circumferential through hole; 2. Cable bundle; 3. Control assembly; 31. Handwheel; 32. Linkage rod; 33. Slider support; 34. Transmission gear; 4. Separation assembly; 41. Hinge pin; 42. Main partition plate; 43. First pulley plate; 44. Side partition plate; 45. Second pulley plate; 46. Positioning partition plate; 47. Fixed hinge shaft; 5. Bistable hinge shaft assembly; 51. Hinge seat; 52. Fixing screw; 53. Bistable torsion spring; 54. Torsion spring pressure plate; 55. Hanging spring pin; 56. Limit stop. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0036] A type of cable protection pipe, such as Figure 1 , Figure 3 and Figure 4 As shown, the main body of the outer cylinder assembly 1 is the outer tube 11, which is a cylindrical structure. A fixing gear ring 12 is fixedly installed on the inner side of the end of the outer tube 11 and is coaxially arranged therewith. An annular receiving groove 13 is opened on the inner side wall of the outer tube 11, and the depth of the receiving groove 13 matches the thickness of the partition assembly 4 after folding. Three sections of outer wall guide rail 14 are opened on the end side wall of the outer tube 11 in the circumferential direction. The three sections of outer wall guide rail 14 are evenly distributed in the circumferential direction, and each section of outer wall guide rail 14 has a circumferential through hole 15 that extends in the circumferential direction and penetrates the side wall of the outer tube 11.

[0037] like Figure 1 , Figure 7 , Figure 8 and Figure 9 As shown, the partition assembly 4 is disposed inside the outer cylinder assembly 1, and includes at least three partition units evenly distributed along the circumference of the outer tube 11. The number of partition units can be set to three, four or more according to the cable arrangement requirements. This embodiment is illustrated by taking three partition units evenly distributed along the circumference at 120° as an example. Each partition unit is composed of a main partition plate 42, a side partition plate 44 and a positioning partition plate 46, which are sequentially hinged end to end. All three partition plates are arc-shaped plates extending along the axial direction of the outer tube 11, and each hinge axis is arranged along the axial direction of the outer tube 11. The end of the positioning partition plate 46 away from the side partition plate 44 is hinged to the inner sidewall of the outer tube 11 through a fixed hinge shaft 47; the end of the main partition plate 42 away from the side partition plate 44 is hinged with a hinge pin 41, which is arranged along the axial direction of the outer tube 11 and passes through the circumferential through hole 15. A first pulley plate 43 is fixedly installed on the side of the main partition plate 42 facing the center of the tube, and a second pulley plate 45 is fixedly installed on the side of the side partition plate 44 facing the center of the tube. The surfaces of the first pulley plate 43 and the second pulley plate 45 are both arc-shaped to match the outer contour of the cable, and several pulley balls evenly arranged along the axial direction are embedded on the surface of the plate. The pulley balls can rotate freely around their own axis. Alternatively, an auxiliary torsion spring can be provided at the hinge point between the hinge pin 41 and the main partition plate 42 to provide the initial torque for determining the flipping direction.

[0038] like Figure 1 and Figure 2As shown, a bistable retaining mechanism is provided between the inner wall of the outer tube 11 and the positioning partition plate 46. In this embodiment, the bistable retaining mechanism is implemented by a bistable hinge assembly 5. The bistable hinge assembly 5 includes a hinge seat 51, a fixing screw 52, ​​a bistable torsion spring 53, a torsion spring pressure plate 54, a hanging spring pin 55, and a limiting stop 56. The bottom end of the hinge seat 51 is directly fixed to the inner wall of the outer tube 11 by fixing screws 52, and the fixed hinge shaft 47 is installed on the hinge seat 51; the bistable torsion springs 53 are arranged in pairs, and the two bistable torsion springs 53 are symmetrically arranged on both sides of the positioning partition plate 46 to avoid the plate from twisting and jamming when it is flipped due to unilateral load; one end of the bistable torsion spring 53 is hooked to the hinge seat 51 by a spring pin 55, and the torsion arm of the bistable torsion spring 53 passes through the torsion spring pressure plate 54; the torsion spring pressure plate 54 is connected to the positioning partition plate 46 by a limiting block 56 and flips synchronously with the positioning partition plate 46. When the positioning partition plate 46 is flipped, the torsion spring pressure plate 54 drives the torsion arm of the bistable torsion spring 53 to store or release energy: when the line of action of the bistable torsion spring 53 is located on one side of the axis of the fixed hinge shaft 47, its torque presses the partition unit into the receiving groove 13, forming a folded stable state; when the line of action crosses the axis of the fixed hinge shaft 47 during the flipping process, the torque reverses, and this position is an unstable equilibrium position; when the line of action crosses the other side of the axis, the torque drives the positioning partition plate 46 to continue flipping until the limit block 56 flips with the positioning partition plate 46 to the position of abutting the hinge seat 51. The torque of the bistable torsion spring 53 acts on the limit block 56 through the torsion spring pressure plate 54, pressing the positioning partition plate 46 to maintain it in the unfolded working state, realizing the mechanical limit and self-holding of the unfolded position. It should be noted that the bistable holding mechanism refers to a holding mechanism with two stable equilibrium positions and an unstable equilibrium position in the middle. In addition to the torsion spring over-dead-point structure mentioned above, as an alternative implementation, the bistable holding mechanism can also adopt other forms such as a magnetic bistable mechanism, which uses magnetic attraction to switch between the two stable positions and also acts on the position of the positioning partition plate 46 that is off the axis of the fixed hinge shaft 47, so as to realize the bistable holding of the partition component 4.

[0039] like Figure 5 and Figure 6As shown, the control component 3 is installed at the end of the outer tube 11 and is used to drive the partition component 4 to switch between a folded storage state and an unfolded working state. The control component 3 includes a handwheel 31, a linkage rod 32, and three slider supports 33 corresponding to the partition units. The handwheel 31 is coaxially and rotatably installed at the end of the outer tube 11 and is fixedly connected to the three slider supports 33 respectively through three linkage rods 32 evenly distributed along the circumference. The three slider supports 33 are slidably mounted on three sections of outer wall guide rails 14. The outer wall guide rails 14 extend in a straight line along the circumference of the outer tube 11 to limit the sliding trajectory of the slider supports 33. The outer end of the hinge pin 41 passes through the circumferential through hole 15 and is fixedly connected to the corresponding slider support 33, so that the circumferential sliding of the slider support 33 can pull the main partition plate 42 to move through the hinge pin 41. Each slider support 33 is equipped with a transmission gear 34 on the side facing the fixed gear ring 12. The transmission gear 34 meshes with the fixed gear ring 12. When the slider support 33 slides, the transmission gear 34 rolls along the fixed gear ring 12, ensuring the accuracy and stability of the synchronous movement of the three slider supports 33. As an alternative implementation, the transmission gear 34 and the fixed gear ring 12 can be omitted, allowing the slider support 33 to be directly slidably mounted on the outer wall guide rail 14. Anti-friction pads or rollers can be embedded between the contact surfaces of the slider support 33 and the outer wall guide rail 14 to reduce sliding resistance. In addition, besides the handwheel 31 and the connecting rod 32 mentioned above, conventional drive methods such as lead screws and nuts, cams, or electric push rods can also be used to drive all slider supports 33 to slide synchronously.

[0040] Combination Figure 1 , Figure 9 and Figure 10As shown, the usage process of this cable protection tube is as follows: In the initial state, the separator assembly 4 is in a folded storage state. The main separator plate 42, side separator plate 44 and positioning separator plate 46 of all separator units are stacked and stored in the receiving groove 13. The outer surface of the main separator plate 42 is flush with the inner wall of the outer tube 11. A through cavity is formed inside the outer tube 11. The seven-core cable of the cable bundle 2 can be arranged in a "2-3-2" honeycomb pattern and passed through the cavity. At this time, the line of action of the bistable torsion spring 53 is located on one side of the axis of the fixed hinge shaft 47, which presses the separator assembly 4 into place in the receiving groove 13. It will not pop out on its own during transportation and cable threading. When cables need to be separated and arranged, the operator turns the handwheel 31. The handwheel 31 drives three sliding blocks 33 to slide synchronously circumferentially along the outer wall guide rail 14 via three connecting rods 32. The hinge pin 41 pulls the outer end of the main partition plate 42 to move circumferentially. Each partition unit swings dynamically through the hinge linkage of the three partition plates, adjusting the internal space shape of the outer tube 11. In the first half of the sliding stroke of the sliding block 33, the torsion spring pressure plate 54 drives the torsion arm of the bistable torsion spring 53 to gradually store energy, and the torque applied by the operator increases steadily. When the sliding block 33 slides to the middle of the stroke, the bistable torsion spring 53... The line of action of the torsion spring 53 crosses the axis of the fixed hinge shaft 47, the torque reverses, and the bistable torsion spring 53 releases its elastic potential energy, automatically driving the separator assembly 4 to complete the final deployment. Even if cables are already threaded inside the tube and the deployment resistance is high, the three separator units can be synchronously and reliably positioned under the drive of the torsion spring. The limit stop 56 flips with the positioning separator plate 46 to the position abutting against the hinge seat 51 and is pressed by the torque of the torsion spring. The three separator units surround the center of the outer tube 11 to form an independent central receiving cavity, and divide the periphery into three independent fan-shaped partitions. The entire process requires no manual locking operation. The central receiving cavity can accommodate the core cable alone, completely physically isolating it from the peripheral cables and preventing the peripheral cables from affecting the core cable due to force. When the cable is threaded or pulled for maintenance, the cable surface contacts the roller balls on the first pulley plate 43 and the second pulley plate 45, converting sliding friction into rolling friction, which greatly reduces the pulling resistance and reduces cable sheath wear. When the partition component 4 needs to be stored, simply turn the handwheel 31 in the opposite direction: in the first half of the stroke, the holding torque of the bistable torsion spring 53 is overcome, and after the line of action crosses the axis of the fixed hinge shaft 47 again, the torsion spring reverses direction and automatically retracts and presses the partition component 4 back into the receiving groove 13, and the outer tube 11 returns to a through-tube structure, without the need to unlock any parts throughout the process.

[0041] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A cable protection pipe, comprising an outer cylinder assembly (1) and a partition assembly (4) disposed within the outer cylinder assembly (1), characterized in that: The outer cylinder assembly (1) includes an outer tube (11), and an operating component (3) for controlling the partition assembly (4) is installed at the end of the outer tube (11). The partition assembly (4) includes at least three partition units, which are evenly distributed along the circumference of the outer tube (11); Each of the partition units includes a main partition plate (42), a side partition plate (44), and a positioning partition plate (46) that are hinged together at the ends. The end of the positioning partition plate (46) away from the side partition plate (44) is hinged to the inner wall of the outer tube (11) through a fixed hinge shaft (47); The main partition plate (42) is hinged to a hinge pin (41) at one end away from the side partition plate (44). The hinge pin (41) can slide along the circumference of the outer tube (11) and is connected to the control component (3) in a transmission manner. The outer tube (11) has an outer wall guide rail (14) that corresponds to the partition unit in the circumferential direction on the side wall, and each outer wall guide rail (14) has a circumferential through hole (15). The control component (3) includes a slider support (33) that can slide along the outer wall guide rail (14). The slider support (33) corresponds to the partition unit one by one. The hinge pin (41) passes through the circumferential through hole (15) and is fixedly connected to the slider support (33). The control component (3) is also configured to drive all slider supports (33) to slide synchronously along the outer wall guide rail (14). A bistable holding mechanism is provided between the inner wall of the outer tube (11) and the positioning partition plate (46). The bistable holding mechanism acts on the positioning partition plate (46) at a position that deviates from the axis of the fixed hinge (47) to keep the partition assembly (4) in a folded storage state or an unfolded working state. When the control component (3) drives the hinge pin (41) to move circumferentially along the outer tube (11), each partition unit swings through the hinge linkage of the main partition plate (42), the side partition plate (44) and the positioning partition plate (46), so that the partition component (4) switches between the folded storage state and the unfolded working state, so as to dynamically adjust the internal space shape of the outer tube (11). In the folded storage state, the main partition plate (42), side partition plate (44) and positioning partition plate (46) of all partition units are stacked and stored on the inner wall of the outer tube (11), so that a through cavity is formed inside the outer tube (11), and the bistable holding mechanism keeps the partition assembly (4) in the folded storage state. In the deployed working state, all the partition units are deployed synchronously, forming multiple independent fan-shaped partitions around the outer tube (11), and forming an independent central receiving cavity in the center of the outer tube (11), and the bistable holding mechanism keeps the partition components (4) in the deployed working state.

2. The cable protection pipe according to claim 1, characterized in that, The bistable holding mechanism is a bistable hinge assembly (5), which includes a hinge base (51), a bistable torsion spring (53), a torsion spring pressure plate (54), and a limiting block (56). The bottom end of the hinge seat (51) is fixedly installed on the inner wall of the outer tube (11) by a fixing screw (52), and the fixing hinge shaft (47) is installed on the hinge seat (51); one end of the bistable torsion spring (53) is hooked to the hinge seat (51) by a spring pin (55), and the torsion arm of the bistable torsion spring (53) passes through the torsion spring pressure plate (54); the torsion spring pressure plate (54) is connected to the positioning partition plate (46) by a limiting block (56), and rotates synchronously with the positioning partition plate (46); when the positioning partition plate (46) rotates, the torsion spring pressure plate (54) drives the torsion arm of the bistable torsion spring (53) to store or release energy, thereby realizing bistable switching.

3. A cable protection pipe according to claim 2, characterized in that, In the unfolded working state, the limit block (56) flips with the positioning partition plate (46) to the position abutting against the hinge seat (51), and the torque of the bistable torsion spring (53) is applied to the limit block (56) through the torsion spring pressure plate (54), pressing the positioning partition plate (46) to maintain it in the unfolded working state.

4. A cable protection pipe according to claim 2, characterized in that, The bistable torsion springs (53) are arranged in pairs, with the two bistable torsion springs (53) symmetrically arranged on both sides of the positioning partition plate (46).

5. A cable protection pipe according to claim 1, characterized in that, The bistable holding mechanism is configured such that during the transition of the partition component (4) from the folded storage state to the unfolded working state, the line of action of the bistable holding mechanism crosses the axis of the fixed hinge (47) in the middle of the sliding stroke of the slider support (33), and then releases the stored energy to drive the partition component (4) to automatically unfold to the unfolded working state.

6. A cable protection pipe according to claim 1, characterized in that, The three dividing units are evenly distributed at 120° along the circumference of the outer tube (11); in the deployed working state, the three dividing units form three independent sector-shaped partitions on the periphery of the outer tube (11).

7. A cable protection pipe according to claim 1, characterized in that, The inner wall of the outer tube (11) is provided with a receiving groove (13) for accommodating the partition component (4) in the folded state; when the partition component (4) is in the folded storage state, the side partition plate (44) and the positioning partition plate (46) are stacked and attached to each other, the outer surface of the main partition plate (42) is flush with the inner wall of the outer tube (11), and the entire partition component (4) is stored in the receiving groove (13).

8. A cable protection pipe according to claim 1, characterized in that, A fixed gear ring (12) is fixedly installed on the inner side of the end of the outer tube (11). The outer wall guide rail (14) is opened on the end side wall of the outer tube (11) and is evenly arranged along the circumference of the outer tube (11). A transmission gear (34) is installed on the side of each slider support (33) facing the fixed gear ring (12). The transmission gear (34) meshes with the fixed gear ring (12) for transmission. The outer wall guide rail (14) extends in a straight line along the circumference of the outer tube (11) to limit the sliding trajectory of the slider support (33).

9. A cable protection pipe according to claim 1, characterized in that, The main partition plate (42) is provided with a first pulley plate (43) on the side facing the inner space of the tube, and the side partition plate (44) is provided with a second pulley plate (45) on the side facing the inner space of the tube. The surfaces of the first pulley plate (43) and the second pulley plate (45) are arc-shaped, and a number of pulley balls arranged along the axial direction of the outer tube (11) are embedded on the surface. The pulley balls rotate freely around their own axis to convert the sliding friction between the cable and the partition assembly (4) into rolling friction.

10. A cable protection pipe according to claim 1, characterized in that, The slider support (33) is directly slidably mounted on the outer wall guide rail (14), and a friction-reducing pad or rollers are embedded between the contact surfaces of the slider support (33) and the outer wall guide rail (14).

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