Cable protection sleeve

Abstract

The invention relates to the technical field of wind power generation equipment, in particular to a cable protection sleeve which comprises a cable fixing pipe, a flexible anti-abrasion protection sleeve and a rigid limiting protection sleeve, and the flexible anti-abrasion protection sleeve corresponds to the cable fixing pipe, wraps the outer surface of a cable needing to be protected and provides anti-abrasion protection for the surface layer of the cable needing to be protected. The rigid limiting protection sleeve is arranged in the cable fixing pipe so as to carry out grid-dividing limiting on the cable needing to be protected. Surface layer flexible protection is provided for the cable needing to be protected through the flexible anti-abrasion protection sleeve wrapping the outer surface of the cable needing to be protected, the rigid limiting protection sleeve is matched with the cable fixing pipe to form the rigid clamping groove to conduct grid division limiting on the cable needing to be protected, the freedom degree of the cable needing to be protected is restrained, the shaking amplitude of the cable is restrained, and the service life of the cable needing to be protected is prolonged. Therefore, the flexible anti-abrasion protection sleeve and the rigid limiting protection sleeve are cooperated to form rigid-flexible coupling protection design, and dynamic abrasion of a high-frequency friction point of a cable needing to be protected is inhibited.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind power generation equipment, in particular to a cable protection sleeve. BACKGROUND

[0002] With the progress of fan technology and the improvement of energy efficiency requirements, long blades and high towers have become the development direction of wind turbine generators. As the core component of power transmission in wind turbine generators, cables need to be exposed to complex dynamic environments for a long time, which is prone to wear and tear. Due to the frequent changes in wind direction in the wind field, the yaw system of the wind turbine generator needs to repeatedly adjust the direction of the nacelle to align with the wind direction, resulting in continuous friction, twisting and collision between the cables at the top of the tower and the accessories (such as ladders, bolts, etc.) around the fixed pipe. Under the same wind speed conditions, the cables at the yaw cable twisting position of the wind turbine generator are more prone to wear and tear due to friction and shaking during operation.

[0003] According to statistics, cable wear and tear accounts for more than 15% of unplanned shutdown events of wind turbine generators, and the maintenance cost of replacing the cable is as high as tens of thousands of yuan per time. Traditional solutions mainly rely on passive protection measures, such as wrapping rubber sleeves around the cable surface or adding hard plastic plates. Although this method can temporarily alleviate wear and tear, it has obvious defects, such as material aging, and rubber or plastic sleeves are prone to brittleness and cracking under the action of long-term temperature changes and mechanical stress, losing their protective effect. Secondly, it lacks dynamic restriction, and a simple rubber sleeve cannot effectively inhibit the multi-degree-of-freedom shaking of the cable in the fixed pipe, such as axial sliding and radial swinging, which can easily cause secondary friction between the sleeve and the cable, accelerating wear and tear, and making it difficult to effectively reduce cable wear and tear. SUMMARY

[0004] The present application provides a cable protection sleeve to solve the problem of traditional rubber protection sleeves being prone to brittleness, cracking, lacking dynamic restriction, and being difficult to effectively reduce cable wear and tear rate in the prior art.

[0005] The present application provides a cable protection sleeve, comprising: a cable fixing pipe;

[0006] A flexible anti-wear protection sleeve is provided corresponding to the cable fixing pipe and wrapped around the outer surface of the cable to be protected to provide anti-wear protection for the surface layer of the cable to be protected.

[0007] A rigid limiting protection sleeve is provided inside the cable fixing pipe to limit the grid of the cable to be protected.

[0008] Preferably, the length of the flexible anti-wear protection sleeve is greater than the length of the cable fixing pipe, and both ends of the flexible anti-wear protection sleeve need to exceed the protection range of the cable fixing pipe.

[0009] Preferably, the rigid limiting protective sleeve comprises:

[0010] The intermediate pipe;

[0011] The adjusting ring is provided with a plurality of adjusting rings, and the two groups of adjusting rings are symmetrically arranged on the upper and lower sides of the fixed pipe.

[0012] Preferably, the outer surface of any one of the adjusting rings is fixedly connected with two limiting columns, and the two limiting columns are symmetrically arranged on the outer surface of the corresponding adjusting ring.

[0013] Any one of the adjusting ring and the side of the intermediate pipe is provided with a plurality of arc-shaped adjusting grooves, and the plurality of arc-shaped adjusting grooves are arranged in a ring array on the upper surface of the corresponding adjusting ring or intermediate pipe, and the plurality of arc-shaped adjusting grooves are all through the other side of the corresponding adjusting ring or intermediate pipe.

[0014] Preferably, the outer surface of the rigid limiting protective sleeve is further provided with a plurality of plug-in columns, and the plurality of plug-in columns are arranged in a ring array on the outer surface of the intermediate pipe.

[0015] Preferably, the rigid limiting protective sleeve is movably arranged in the cable fixed pipe.

[0016] Preferably, the inside of the cable fixed pipe is provided with a plurality of movable grooves, and the positions of the plurality of movable grooves correspond to the positions of the plurality of plug-in columns, respectively.

[0017] Preferably, the inside of the cable fixed pipe is provided with a plurality of spiral grooves, and the positions of the plurality of spiral grooves correspond to the positions of the plurality of plug-in columns.

[0018] Preferably, the rigid limiting protective sleeve is fixedly arranged in the cable fixed pipe.

[0019] Preferably, the inside of the cable fixed pipe is provided with a plurality of plug-in ports for plugging the plug-in columns, and the plurality of plug-in ports are arranged in a ring array on the inner wall of the fixed pipe.

[0020] The beneficial effects of the present application are as follows:

[0021] The cable protection sleeve of the present application provides surface flexibility protection for the cable to be protected by wrapping the flexible anti-abrasion protective sleeve on the outer surface of the cable to be protected, and limits the position of the cable to be protected by forming a rigid clamping groove with the cable fixing tube cooperating with the rigid limiting protective sleeve to constrain the freedom degree of the cable to be protected and inhibit the shaking amplitude of the cable, so that the flexible anti-abrasion protective sleeve and the rigid limiting protective sleeve cooperatively form a rigid-flexible coupling protection design to inhibit the dynamic abrasion at the high-frequency friction point of the cable to be protected, reduce the cable abrasion rate, prolong the service life of the cable, and reduce the risk of shutdown.

[0022] Further, by rotating the adjusting ring, the arrangement number and arrangement spacing between the limiting columns can be adjusted, so that the number and size of the space compartments formed thereby can be adaptively adjusted and matched according to the grouping number and thickness of the cable to be protected. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the description of the specific embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0024] Figure 1 The overall structure schematic diagram of the cable protection sleeve provided by the embodiment of the present application is shown in the figure.

[0025] Figure 2 The top view of the overall structure of the cable protection sleeve in the embodiment of the present application is shown in the figure.

[0026] Figure 3 The overall structure schematic diagram of the rigid limiting sleeve in the embodiment of the present application is shown in the figure.

[0027] Figure 4 The front view schematic diagram of the overall structure of the cable protection sleeve in the embodiment of the present application is shown in the figure.

[0028] Figure 5 The cross-sectional view schematic diagram of the overall structure of the cable protection sleeve in the embodiment of the present application is shown in the figure.

[0029] Figure 6 The side view schematic diagram of the spiral groove cable fixing tube in the embodiment of the present application is shown in the figure.

[0030] REFERENCE NUMERALS:

[0031] 1, cable fixing tube; 2, flexible anti-abrasion protective sleeve; 3, required protective cable; 4, rigid limiting protective sleeve; 410, middle tube; 411, plug-in column; 420, adjusting ring; 421, limiting column; 430, arc-shaped adjusting groove; 440, weight-reducing groove; 450, heat dissipation hole; 5, movable groove; 6, spiral groove. DETAILED DESCRIPTION

[0032] The technical solutions of the present application will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0033] The cable protective sleeve provided in the embodiments of the present application will be described below with reference to Figures 1-6 .

[0034] Referring to FIGS. 1 to 6, wherein, Figure 1 FIG. 1 is a schematic diagram of the overall structure of the cable protective sleeve provided in the embodiments of the present application, Figure 2 FIG. 2 is a top view of the overall structure of the cable protective sleeve provided in the embodiments of the present application; Figure 1 Figure 2 The cable protective sleeve provided in the embodiments of the present application comprises a cable fixing tube 1, a flexible anti-abrasion protective sleeve 2 and a rigid limiting protective sleeve 4. The cable fixing tube 1 is arranged at a high-frequency friction point of a required protective cable 3, and provides external anti-collision protection for the cable while uniformly limiting the cable. The flexible anti-abrasion protective sleeve 2 is correspondingly arranged inside the cable fixing tube 1 and wrapped around the outer surface of the required protective cable 3 to provide anti-abrasion protection for the surface layer of the required protective cable 3. The rigid limiting protective sleeve 4 is arranged at a position inside and below the cable fixing tube 1 to limit the required protective cable 3 in sections.

[0035] The flexible anti-abrasion protective sleeve 2 is made of a high-abrasion-resistant composite material such as polyurethane-nylon composite material, and is wrapped around the outer surface of the required protective cable to provide flexible anti-abrasion protection through the flexible layer viscoelastic energy absorption.

[0036] The rigid limiting protective sleeve 4 cooperates with the limiting columns 421 arranged therein to form a rigid clamping groove for limiting the required protective cable 3 in sections, so as to constrain the freedom of the cable, reduce the swing space of the cable and reduce the dynamic abrasion of the cable. The rigid limiting protective sleeve 4 can be designed by using a lightweight rigid material such as aluminum alloy material or glass fiber nylon material or carbon fiber material, so as to reduce the weight of the rigid limiting protective sleeve 4 while ensuring the rigidity of the sleeve, thereby reducing the load applied to the cable or the cable fixing tube 1 by the sleeve.

[0037] The flexible anti-abrasion protective sleeve 2 is made of a high-abrasion-resistant composite material such as polyurethane-nylon composite material, and is wrapped around the outer surface of the required protective cable to provide flexible anti-abrasion protection through the flexible layer viscoelastic energy absorption.

[0038] ​The flexible anti-abrasion protective sleeve 2 wrapped on the outer surface of the required protective cable 3 provides surface flexible protection for the cable to be protected, and the rigid limiting protective sleeve 4 cooperates with the cable fixing pipe 1 to form a rigid clamping groove for limiting the required protective cable 3, so as to constrain the freedom and inhibit the cable shaking amplitude, so that the flexible anti-abrasion protective sleeve 2 and the rigid limiting protective sleeve 4 cooperatively form a rigid-flexible coupling protection design, which inhibits the dynamic abrasion at the high-frequency friction point of the required protective cable 3, reduces the cable abrasion rate, prolongs the cable life, and reduces the risk of shutdown.

[0039] In some embodiments, the length of the flexible anti-abrasion protective sleeve 2 is greater than the length of the cable fixing pipe 1, and the two ends of the flexible anti-abrasion protective sleeve need to exceed the protection range of the cable fixing pipe 1.

[0040] In this embodiment, in order to conveniently limit the flexible anti-abrasion protective sleeve 2, the two ends of the flexible anti-abrasion protective sleeve need to be exposed from the two ends of the cable fixing pipe 1 to be installed, so as to facilitate the later binding or fastening, and therefore the length of the flexible anti-abrasion protective sleeve 2 needs to be greater than the length of the cable fixing pipe 1 at the corresponding position, for example, the length of the common cable fixing pipe 1 is usually 40-45 cm, at this time, in order to increase the protection range of the cable and reduce the abrasion of the cable and the corresponding cable fixing pipe 1 inside and edge, the length of the flexible anti-abrasion protective sleeve 2 can be selected as 60 cm, and during the setting process, when the flexible anti-abrasion protective sleeve 2 is wrapped on the outer surface of the required protective cable 3, the distance of the flexible anti-abrasion protective sleeve 2 exposed from the upper and lower ends of the cable fixing pipe 1 is consistent, which is convenient for subsequent binding and fastening;

[0041] Further, the required flexible anti-abrasion protective sleeve 2 can also be separately arranged at the remaining easy-abrasion positions of the required protective cable 3, such as the ladder connection position and the bolt setting position, to modularly and separately protect the same.

[0042] The anti-abrasion protective sleeve shown in the figure and the required protective cable 3 are a schematic diagram of the installation length and installation position, and the required protective cable 3 shown is a cable group completed after grouping according to the power cable, and in the specific use process, the single cable in each cable group still needs to be wrapped according to the actual number to reduce the dynamic friction between the cables in each group.

[0043] Please continue to refer to Figure 3 As Figure 3 shown, it is a whole structure schematic diagram of the rigid limiting sleeve in the embodiment of the application;

[0044] In some embodiments, the rigid limiting protective sleeve 4 comprises:

[0045] The intermediate pipe 410;

[0046] The adjusting ring 420 is provided with a plurality of adjusting rings 420, which are divided into two groups, and the two groups of adjusting rings 420 are symmetrically arranged on the upper and lower sides of the fixed pipe.

[0047] The upper and lower sides of the adjusting ring 420 and the intermediate pipe 410 are provided with a plurality of weight reduction grooves 440 to reduce the overall weight and reduce the load applied to the cable and the cable fixing pipe 1.

[0048] The outer surfaces of the adjusting ring 420 and the intermediate pipe 410 are provided with a plurality of heat dissipation holes 450, and the plurality of heat dissipation holes 450 penetrate to the inner surfaces of the corresponding adjusting ring 420 and the intermediate pipe 410 to enhance the heat dissipation function and avoid affecting the normal heat dissipation of the cable.

[0049] In some embodiments, the outer surface of any one of the adjusting ring 420 is fixedly connected with two limiting columns 421, and the two limiting columns 421 are symmetrically arranged on the outer surface of the corresponding adjusting ring 420.

[0050] One side of any one of the adjusting ring 420 and the intermediate pipe 410 is provided with a plurality of arc-shaped adjusting grooves 430, and the plurality of arc-shaped adjusting grooves 430 are arranged in a ring array on the upper surface of the corresponding adjusting ring 420 or the intermediate pipe 410, and the plurality of arc-shaped adjusting grooves 430 penetrate to the other side of the corresponding adjusting ring 420 or the intermediate pipe 410.

[0051] When the arc-shaped adjusting groove 430 is set, two ways of setting a plurality of small-arc adjusting grooves 430 or a small number of large-arc adjusting grooves 430 can be used to expand the movable range of the fastener on the surface of the adjusting ring 420, thereby expanding the adjustable range of each limiting column 421, and the arc-shaped adjusting groove 430 is set to be not less than two, which is convenient for subsequent adjustment and installation. In this embodiment, a small number of large-arc adjusting grooves 430 are used.

[0052] In this embodiment, the adjusting ring 420 and the intermediate pipe 410 can be fastened by a bolt group. When the adjusting ring 420 and the intermediate pipe 410 are assembled, the arc-shaped adjusting grooves 430 provided on the adjusting ring 420 and the arc-shaped adjusting grooves 430 provided on the intermediate pipe 410 are in a vertical state, so that the bolts are inserted thereinto and fastened. At the same time, soft gaskets can be added in the bolt group to further enhance the fastening degree without damaging the adjusting ring 420.

[0053] By screwing or unscrewing the bolt set, the corresponding adjusting ring 420 arranged on the upper and lower sides of the intermediate pipe 410 is adjusted or fixed, thereby adjusting the spacing between the limiting columns 421, so that different spacing sizes of the space compartments can be formed according to the thickness of the required protective cable, thereby limiting the cable in the compartments and restricting the freedom of the cable in the corresponding cable fixing pipe 1, so as to reduce the dynamic wear between the cables.

[0054] In the embodiment, by rotating and adjusting the adjusting ring 420, the arrangement and spacing between the limiting columns 421 are adjusted, so that the number and size of the compartments can be adaptively adjusted and matched according to the grouping number and grouping size of the required protective cable 3. For example, when three groups of cables of the same phase are divided into one group and finally divided into six groups of power cables, if the four adjusting rings 420 are arranged on the upper and lower sides of the intermediate pipe 410, by rotating three of the adjusting rings 420, six space compartments can be formed between the corresponding six limiting columns 421, and the positions of the two limiting columns 421 of the last adjusting ring 420 correspond to the positions of the two limiting columns 421 on any one adjusting ring 420. At this time, without destroying the six space compartments formed before, six space compartments can be formed between the four adjusting rings 420 to limit the six groups of power cables, and the flexible anti-wear protective sleeve 2 wrapped around the outer surface of the corresponding cable forms a rigid-flexible coupling design, thereby cooperatively suppressing the dynamic wear of the cable.

[0055] In some embodiments, the outer surface of the rigid limiting protective sleeve 4 is further provided with a plurality of plug-in columns 411, which are arranged in a ring array on the outer surface of the intermediate pipe 410, and the number of plug-in columns 411 should be not less than two to maintain its stability. For the convenience of subsequent adjustment of the adjusting ring 420 and the limiting column 421 on it according to the grouping of the required protective cable 3, the number of plug-in columns 411 can be directly the same as the number of limiting columns 421.

[0056] In some embodiments, the rigid limiting protective sleeve 4 can be movably arranged in the cable fixing pipe 1.

[0057] Please continue to refer to Figure 4 and Figure 5 as shown in Figure 4 and Figure 5 , wherein, Figure 4 is a front view of the cable protective sleeve as a whole in the embodiment of the application, Figure 5 is a cross-sectional view of the cable protective sleeve as a whole in the embodiment of the application.

[0058] In some embodiments, the cable fixing tube 1 is internally provided with a plurality of movable slots 5, and the positions of the plurality of movable slots 5 correspond to the positions of the plurality of plug-in columns 411.

[0059] In the embodiment, the plurality of movable slots 5 are provided at the same horizontal plane, the length of the movable slots 5 is greater than the diameter of the column of the plug-in column 411, and the width of the movable slots 5 is the same as the diameter of the plug-in column 411, so as to avoid the plug-in column 411 from being separated from the movable slots 5 during movement. By providing the movable slots 5 with a length greater than the diameter of the column of the plug-in column 411, the corresponding plug-in column 411 can move inside the corresponding movable slot 5, so that it can rotate at the same horizontal plane, thereby cooperating with the power cable to move to a certain extent.

[0060] Further, the plurality of movable slots 5 can be replaced by a complete annular slot, so that the rigid limiting protective sleeve 4 can cooperate with the power cable to twist the cable while maintaining the compartmental limiting of the required protected cable 3.

[0061] Please continue to refer to Figure 6 As shown in Figure 6 which is a side cross-sectional view of the cable fixing tube 1 with a spiral slot 6 in the embodiment of the application.

[0062] In some embodiments, the cable fixing tube 1 is internally provided with a plurality of spiral slots 6, and the positions of the plurality of spiral slots 6 correspond to the positions of the plurality of plug-in columns 411.

[0063] By providing the cable fixing tube 1 with the spiral slots 6 that are adapted to the plug-in columns 411, the rigid limiting protective sleeve 4 can rotate inside the cable fixing tube 1 under the cooperation of the plug-in columns 411 and the spiral slots 6, so as to cooperate with the power cable to twist the cable, and the pitch of the spiral threads of the spiral slots 6 should not be too large, so as to limit the rising or falling amplitude of the rigid limiting protective sleeve 4 inside the cable fixing tube 1.

[0064] In some embodiments, the rigid limiting protective sleeve 4 is fixedly arranged inside the cable fixing tube 1.

[0065] In some embodiments, the cable fixing tube 1 is internally provided with a plurality of plug-in ports for the plug-in columns 411, and the plurality of plug-in ports are arranged in an annular array on the inner wall of the fixing tube, and the opening size and the opening shape of the plurality of plug-in ports correspond to the shape, size and position of the corresponding plug-in column 411, so that the rigid limiting protective sleeve 4 can be fixedly arranged inside the cable fixing tube 1 through the plug-in column 411.

[0066] As another embodiment of the present application, the rigid limiting protective sleeve 4 is fixedly connected with the cable fixing tube 1, thereby further increasing the constraint ability of the freedom of the required protective cable 3, and the limiting protection can be adaptively arranged at the cable without twisting or away from the position requiring twisting.

[0067] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0068] In addition, the terms "first", "second", "third", etc. are only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0069] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection or communication with each other; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0070] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0071] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and that changes, modifications, substitutions and variations can be made by those skilled in the art without departing from the scope of the present application.

Claims

1. A cable protective sleeve, characterized in that, include: Cable fixing pipe; A flexible anti-wear protective sleeve is provided in correspondence with the cable fixing tube and is wrapped around the outer surface of the cable to be protected, providing anti-wear protection for the surface of the cable to be protected. A rigid limiting protective sleeve is disposed inside the cable fixing tube to limit the required protection of the cable by dividing it into sections.

2. The cable protective sleeve according to claim 1, characterized in that, The length of the flexible anti-wear protective sleeve must be greater than the length of the cable fixing pipe, and both ends of the flexible anti-wear protective sleeve must extend beyond the protection range of the cable fixing pipe.

3. The cable protective sleeve according to claim 2, characterized in that, The rigid limiting protective sleeve includes: Intermediate pipe; Multiple adjustment rings are provided, and each adjustment ring is divided into two groups, with the two groups of adjustment rings symmetrically arranged on the upper and lower sides of the fixed tube.

4. The cable protective sleeve according to claim 3, characterized in that, Two limiting posts are fixedly connected to the outer surface of each of the adjustment rings, and the two limiting posts are symmetrically arranged on the outer surface of the corresponding adjustment rings. Each of the adjusting rings and the intermediate tubes has several arc-shaped adjusting grooves on one side. These arc-shaped adjusting grooves are arranged in a circular array on the upper surface of the corresponding adjusting ring or intermediate tube, and each arc-shaped adjusting groove extends to the other side of the corresponding adjusting ring or intermediate tube.

5. The cable protective sleeve according to claim 4, characterized in that, The outer surface of the rigid limiting protective sleeve is also provided with a number of plug-in posts, which are arranged in a ring array on the outer surface of the intermediate tube.

6. The cable protective sleeve according to claim 5, characterized in that, The rigid limiting protective sleeve is movably disposed inside the cable fixing tube.

7. The cable protective sleeve according to claim 6, characterized in that, The cable fixing tube has several movable grooves inside, and the positions of the movable grooves correspond to the positions of the plug-in pins.

8. The cable protective sleeve according to claim 6, characterized in that, The cable fixing tube has several spiral grooves inside, and the positions of the spiral grooves correspond to the positions of the plug-in posts.

9. The cable protective sleeve according to claim 5, characterized in that, The rigid limiting protective sleeve is fixedly installed inside the cable fixing pipe.

10. The cable protective sleeve according to claim 9, characterized in that, The cable fixing tube has several insertion interfaces inside for inserting the insertion post, and the insertion interfaces are arranged in a ring array on the inner wall of the fixing tube.

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