Improved rotary drag chain

Abstract

The utility model discloses an improved rotary drag chain, which comprises a flexible connecting belt (1), an upper connecting plate (5) and a lower connecting plate (6), and is characterized in that a plurality of pipeline fixing blocks (2) are arranged and fixed on the flexible connecting belt (1), a plurality of threading holes (221) are distributed on threading hole plates (22) of the pipeline fixing blocks (2), and the apertures of the threading holes (221) are different. According to the improved rotary drag chain, the threading hole plate is arranged on the pipe fitting fixing block, so that a pipeline in the rotary drag chain is fixed, and the pipeline is prevented from being wound or falling off in the operation process of the rotary drag chain; the pipeline in the integrally designed rotary drag chain is connected with the pipeline of the equipment body through the quick-change plug or the aviation plug, quick disconnection and connection can be achieved, quick replacement of the rotary drag chain is achieved, part of the pipeline needing to be replaced is not independently replaced any more, and the rotary drag chain including the pipeline is integrally replaced; and the maintenance efficiency of equipment is improved.

Description

Technical Field

[0001] This utility model relates to the field of cable chain device technology, specifically an improved rotary cable chain. Background Technology

[0002] Rotary cable chains are typically used in conjunction with rotating components on mechanical equipment to accommodate and guide water, electricity, and gas pipelines that are wound around the rotating components. When the rotating components are running, the rotary cable chains also move with them. The function of the rotary cable chains is to protect the water, electricity, and gas pipelines in the cable chains so that they maintain a good connection as the rotating components rotate.

[0003] like Figure 4 As shown, the existing rotary cable chain is generally composed of an upper connecting plate 5, a lower connecting plate 6, and a flexible connecting belt 1, and is formed by assembling multiple components. Each component is a snap ring 7 with the same structure. Multiple snap rings 7 are combined to form a spiral disc-shaped rotary cable chain body, thereby forming a spiral disc-shaped channel space defined by the continuous snap rings 7, which is used to accommodate water, electricity and gas pipelines wrapped around the periphery of the rotating component.

[0004] Figure 4 The rotating cable chain shown has two common problems:

[0005] 1. Inserting and replacing pipelines in a rotary cable carrier is quite troublesome and time-consuming, especially when the rotary cable carrier is installed at a high position. Long-term high-altitude cable pulling operations also pose certain safety hazards.

[0006] Water, electricity, and gas pipelines interwoven in the rotary cable carrier are usually led out from the equipment body and then enter the rotary cable carrier from the inlet. Each pipeline is manually threaded by the assembly engineer, passing through the spiral coil channel space, and finally exiting from the outlet. This pipeline threading process is time-consuming. The number of pipelines threaded in a typical rotary cable carrier is around 10. Installing such a rotary cable carrier usually takes about 2 hours. If the rotary cable carrier is smaller or there are more pipelines, it will take even longer.

[0007] 2. During the rotation process, the tubing inside the cable chain is prone to slippage or tangling.

[0008] Cross-connection refers to the misalignment of inner and outer pipelines. Once cross-connection or entanglement is discovered, the machine needs to be stopped immediately for maintenance to prevent pipelines from falling off or being damaged. The maintenance method involves extracting the faulty pipeline separately and then re-inserting the newly replaced pipeline. This process is more time-consuming than directly inserting the pipeline and usually requires a longer downtime, resulting in lower equipment maintenance efficiency and consequently affecting production efficiency. Utility Model Content

[0009] The utility model discloses a purpose is to the prior art problem, provide an improved rotary tow chain, the improved rotary tow chain improves the stability of pipeline position in rotary tow chain through integrated design, can also realize quick replacement when pipeline failure, improve the maintenance efficiency of equipment.

[0010] The utility model discloses a purpose is solved through following technical scheme:

[0011] An improved rotary tow chain, including flexible connecting belt, upper connecting plate, and lower connecting plate, its characterized in that: flexible connecting belt is arranged fixed with a plurality of pipeline fixed blocks, and the threading hole plate of pipeline fixed block is distributed with a plurality of threading holes, and the aperture of threading hole is not identical.

[0012] Relative to any pipeline fixed block of improved rotary tow chain, the threading hole of small aperture is located at the inside of improved rotary tow chain, and the threading hole of big aperture is located at the outside of improved rotary tow chain.

[0013] Pipeline fixed block is composed of the combination of integrally formed L-shaped plate and threading hole plate, the short side of L-shaped plate is vertically arranged to form the side of pipeline fixed block, the long side of L-shaped plate forms the bottom surface of pipeline fixed block, and the threading hole plate is arranged perpendicular to the short side and the long side of L-shaped plate, so that the threading hole plate is located in the space formed by the outer contour of L-shaped plate.

[0014] The upper side of the side of the pipeline fixed block is provided with a protruding part on both sides, and the two protruding parts on the same pipeline fixed block are symmetrically arranged, when the protruding parts of the adjacent two pipeline fixed blocks abut each other, a certain gap is formed between the side edges of the adjacent pipeline fixed blocks except the protruding parts, to meet the requirement of the moving space when the flexible connecting belt moves, so that the flexible connecting belt can form an arc.

[0015] The bottom surface of the pipeline fixed block is an isosceles trapezoid, the top end of the isosceles trapezoid is connected with the side bottom end of the pipeline fixed block and faces the inside of the rotary tow chain, and the bottom end of the isosceles trapezoid faces the outside of the rotary tow chain, when a plurality of pipeline fixed blocks are arranged on the flexible connecting belt, the two waist portions of the bottom surface of any pipeline fixed block are respectively adjacent to the bottom surface waist portions of the adjacent pipeline fixed blocks.

[0016] The two adjacent edges of the threading hole plate are respectively connected with the short side and the long side of the L-shaped plate, at this time, the threading hole with smaller aperture is arranged near the corner of the L-shaped plate, and the threading hole with larger aperture is arranged away from the L-shaped plate.

[0017] The pipeline fixed block is made of nylon material by 3D printing.

[0018] Each pipeline fixing block is equipped with a clamping plate and a limiting block. The clamping plate and the pipeline fixing block hold the flexible connecting strip in between and are fixedly connected by bolts. The limiting block located outside the clamping plate is directly fixed to the bottom surface of the pipeline fixing block.

[0019] The limiting block has inclined surfaces on both end faces, and the flexible connecting strip bends to its limit position when the inclined surfaces of two adjacent limiting blocks abut against each other.

[0020] The flexible connecting strip is spirally wound around the periphery of the DD motor. The upper end of the flexible connecting strip is connected to the mover end of the DD motor through the upper connecting plate, and the lower end is connected to the stator end of the DD motor through the lower connecting plate.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] The improved rotary cable carrier provided by this utility model fixes the pipeline in the rotary cable carrier by setting a through-hole plate on the pipe fixing block, which prevents the pipeline from getting tangled or falling off during the operation of the rotary cable carrier. At the same time, the setting of the limiting block prevents the rotary cable carrier from being excessively bent.

[0023] The improved rotary cable chain provided by this utility model realizes the integrated design of the rotary cable chain and pipeline. The pipeline in the rotary cable chain is connected to the pipeline of the equipment body through quick-connect plugs or aviation plugs, which can quickly disconnect and connect the pipeline, thereby realizing the rapid replacement of the rotary cable chain. If some pipelines in the rotary cable chain need to be replaced, they are no longer replaced individually, but the entire cable chain, including the pipelines, is replaced, which can improve the maintenance efficiency of the equipment. Attached Figure Description

[0024] Appendix Figure 1 The appearance drawing of the improved rotary cable chain provided by this utility model;

[0025] Appendix Figure 2 Exploded view and enlarged view of a portion of the improved rotary cable chain provided by this utility model;

[0026] Appendix Figure 3 This is a schematic diagram of the pipeline fixing block structure provided by this utility model;

[0027] Appendix Figure 4 This is a schematic diagram of a rotary cable chain structure in the prior art.

[0028] Wherein: 1—flexible connecting strip; 2—pipeline fixing block; 21—L-shaped plate; 211—protrusion; 22—threading hole plate; 221—threading hole; 3—limiting block; 31—sloping surface; 4—clamping plate; 5—upper connecting plate; 6—lower connecting plate; 7—buckle ring. Detailed Implementation

[0029] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0030] The terms “a,” “one,” “the,” and “the” are used to indicate the existence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended meaning of inclusion and that other elements / components / etc. may exist in addition to the listed elements / components / etc.

[0031] like Figures 1-3 As shown: An improved rotary cable chain includes a flexible connecting belt 1, an upper connecting plate 5, and a lower connecting plate 6. The flexible connecting belt 1 is spirally wound around the periphery of a DD motor. The upper end of the flexible connecting belt 1 is connected to the mover end of the DD motor through the upper connecting plate 5, and the lower end is connected to the stator end of the DD motor through the lower connecting plate 6. The flexible connecting belt 1 is made of a composite material composed of rubber and PP, etc., and has good flexibility. When the DD motor is running, it drives the flexible connecting belt 1 to rotate through the upper connecting plate 5. Several pipeline fixing blocks 2 are arranged and fixed on the flexible connecting belt 1. The pipeline fixing blocks 2 are made of nylon material by 3D printing. Several through holes 221 are distributed on the through hole plate 22 of the pipeline fixing blocks 2, and the diameter of the through holes 221 is not uniform. Relative to any pipeline fixing block 2 on the improved rotary cable chain, the through holes 221 with smaller diameters are located on the inner side of the improved rotary cable chain, and the through holes 221 with larger diameters are located on the outer side of the improved rotary cable chain.

[0032] like Figure 2 , Figure 3As shown, the pipeline fixing block 2 is composed of an integrally formed L-shaped plate 21 and a threading hole plate 22, the short side of the L-shaped plate 21 is vertically arranged to form the side surface of the pipeline fixing block 2, the long side of the L-shaped plate 21 forms the bottom surface of the pipeline fixing block 2, the threading hole plate 22 is arranged vertically to the short side and the long side of the L-shaped plate 21, so that the threading hole plate 22 is located in the space formed by the outer contour of the L-shaped plate 21; on the upper side surface of the pipeline fixing block 2, two protruding parts 211 are arranged on both sides, and the two protruding parts 211 on the same pipeline fixing block 2 are symmetrically arranged, when the protruding parts 211 of the adjacent two pipeline fixing blocks 2 abut against each other, a certain gap is formed between the side surfaces of the adjacent pipeline fixing blocks 2 except the protruding parts 211, which meets the requirement of the moving space when the flexible connecting belt 1 moves, so that the flexible connecting belt 1 can form an arc; the bottom surface of the pipeline fixing block 2 is isosceles trapezoidal, the top end of the isosceles trapezoid is connected with the bottom end of the side surface of the pipeline fixing block 2 and faces the inner side of the rotating drag chain, and the bottom end of the isosceles trapezoid faces the outer side of the rotating drag chain; when a plurality of pipeline fixing blocks 2 are arranged on the flexible connecting belt 1, the two waist parts of the bottom surface of any pipeline fixing block 2 are respectively adjacent to the bottom surface waist parts of the adjacent pipeline fixing blocks 2.

[0033] When the pipeline fixing block 2 is assembled to the flexible connecting belt 1, the two adjacent edges of the threading hole plate 22 are vertically connected with the short side and the long side of the L-shaped plate 21 respectively, at this time, the threading hole 221 with a smaller hole diameter is arranged near the corner of the L-shaped plate 21, and the threading hole 221 with a larger hole diameter is arranged away from the L-shaped plate 21.

[0034] Specific to the assembly of the pipeline fixing block 2, as shown in the figure, Figure 2 As shown, any pipeline fixing block 2 is respectively provided with a clamping plate 4 and a limiting block 3, the clamping plate 4 and the pipeline fixing block 2 clamp the flexible connecting belt 1 therebetween and realize the fixed connection of the three through bolts, the limiting block 3 located on the outer side of the clamping plate 4 is directly fixed on the bottom surface of the pipeline fixing block 2, since the limiting block 3 is located on the outer side, the length of the limiting block 3 along the extension direction of the flexible connecting belt 1 is greater than the length of the clamping plate 4; the two end surfaces of the limiting block 3 are provided with inclined surfaces 31, when the inclined surfaces 31 of the adjacent two limiting blocks 3 abut against each other, the bending of the flexible connecting belt 1 reaches the limit position, that is, the minimum curvature radius that the flexible connecting belt 1 can reach in the movement process is controlled, so as to prevent the pipeline from being damaged due to excessive bending of the flexible connecting belt 1. Embodiment

[0035] As shown in the figure, Figures 1-3As shown: an improved rotary drag chain, including flexible connecting belt 1, pipeline fixing block 2, limiting block 3, clamping plate 4, upper connecting plate 5 and lower connecting plate 6, the flexible connecting belt 1 is spirally arranged around the periphery of the DD motor, the upper end of the flexible connecting belt 1 is connected with the moving end of the DD motor through the upper connecting plate 5, and the lower end is connected with the stator end of the DD motor through the lower connecting plate 6; the pipeline fixing block 2 is arranged below the flexible connecting belt 1, and a plurality of pipeline fixing blocks 2 are arranged in sequence along the upper surface of the flexible connecting belt 1, a clamping plate 4 and a limiting block 3 are arranged above each pipeline fixing block 2, the clamping plate 4 is located on the inner side of the rotary drag chain, and the limiting block 3 is located on the outer side of the rotary drag chain, the clamping plate 4 and the pipeline fixing block 2 clamp the flexible connecting belt 1 therebetween, and the three are fixedly connected through bolts, and the limiting block 3 is fixedly connected with the bottom surface of the pipeline fixing block 2.

[0036] As shown: Figures 1-3 The pipeline fixing block 2 is integrally formed by an L-shaped plate 21 and a threading hole plate 22. The short side of the L-shaped plate 21 is vertically arranged to form the side surface of the pipeline fixing block 2, and the long side of the L-shaped plate 21 is horizontally arranged to form the bottom surface of the pipeline fixing block 2. There are two symmetrical protruding portions 211 on the upper two sides of the side surface of the pipeline fixing block 2, and the protruding portions 211 of the adjacent two pipeline fixing blocks 2 abut against each other, so that a certain gap is formed between the side edges of the adjacent pipeline fixing blocks 2 except the protruding portions 211, so as to meet the requirement of the movement space of the flexible connecting belt 1, and the flexible connecting belt 1 can form an arc. The bottom surface of the pipeline fixing block 2 is isosceles trapezoidal, the upper base end of the trapezoid is connected with the bottom end of the side surface of the pipeline fixing block 2, and faces the inner side of the rotary drag chain, the lower base end faces the outer side of the rotary drag chain, and the two waists of the trapezoid are adjacent to the bottom surfaces of the pipeline fixing blocks 2 on the sides. The inner side of the pipeline fixing block 2 is vertically provided with the threading hole plate 22, the outer contour of the threading hole plate 22 is rectangular, the adjacent two edges of the threading hole plate 22 are vertically connected with the short side and the long side of the L-shaped plate 21, and a plurality of threading holes 221 with different diameters are distributed on the threading hole plate 22. The threading holes 221 with smaller diameters are arranged as close to the corners of the L-shaped plate 21 as possible, and the threading holes 221 with larger diameters are arranged away from the L-shaped plate 21, because the threading holes 221 with smaller diameters are used for threading the pipelines with smaller diameters, and the threading holes 221 with larger diameters are used for threading the pipelines with larger diameters, because the pipelines with smaller diameters are usually more flexible than the pipelines with larger diameters, and can withstand smaller curvature radii, so the threading holes 221 with smaller diameters are arranged close to the corners of the L-shaped plate 21. The above-mentioned pipeline fixing block 2 can be made of nylon material by 3D printing.

[0037] As shown: Figure 2As shown: the two end faces of the limiting block 3 are inclined surfaces 31, and the cross section of the limiting block 3 when the pipeline fixing block 2 is inverted is trapezoidal, that is, gradually widened from top to bottom, slightly narrower at the bottom, and when the bottom sides of the adjacent two limiting blocks 3 abut, the middle and upper parts form an inverted isosceles triangle gap, providing the necessary space for the operation of the flexible connecting belt 1, and the inclination of the inclined surface 31 on the end face of the limiting block 3 controls the limit position that the flexible connecting belt 1 can reach when bent.

[0038] Rotary drag chain assembly steps:

[0039] S1: Numbering of threading holes 221: each threading hole 221 on the threading hole plate 22 of the pipeline fixing block 2 is numbered, for example, there are 13 threading holes 221 on the threading hole plate 22 in the utility model, which can be numbered 1-13;

[0040] S2: Pipeline numbering: the water, electricity and gas pipelines to be inserted into the threading holes 221 are also numbered, the pipeline inserted into the No. 1 threading hole 221 is numbered 1, the pipeline inserted into the No. 2 threading hole 221 is numbered 2, and so on. It should be noted that in order to improve the compatibility of the rotary drag chain, the number of threading holes 221 on the pipeline fixing block 2 is designed according to the maximum demand, and the number of pipelines to be inserted in actual application is usually less than or equal to the number of threading holes 221, for example, the number of threading holes 221 is 13, and the number of pipelines may be only 10. The pipeline number can be 10 consecutive natural numbers from 1 to 10, or 10 not completely consecutive numbers from 1 to 13. This is determined by the electrical engineer when designing the pipeline connection diagram, and the pipeline number is marked on the pipeline connection diagram;

[0041] S3: Pipeline threading: the assembly engineer inserts the pipelines into the corresponding threading holes 221 on the threading hole plate 22 according to the number in the pipeline connection diagram, and the threading sequence is from inside to outside, that is, the pipelines close to the inside of the L-shaped plate 21 are threaded first, and then the outside pipelines are threaded in turn;

[0042] S4: Plug installation: after the pipeline threading is completed, quick change plugs or aviation plugs are installed at both ends of the pipeline. Generally, quick change plugs are installed at both ends of water and gas pipelines, and aviation plugs are installed at both ends of electric wires and cables.

[0043] Thus, a complete independent rotary drag chain module is assembled.

[0044] Rotary drag chain installation:

[0045] When installing the rotary drag chain on the equipment body, only the pipelines on the rotary drag chain and the pipelines on the equipment body are directly connected through quick change plugs or aviation plugs. The general installation time is about 15 minutes.

[0046] Rotary drag chain maintenance and replacement:

[0047] Disconnect the quick-change plug or aviation plug connecting the equipment body pipeline and the rotating drag chain pipeline, remove the original rotating drag chain, connect the pipeline of the new rotating drag chain with the equipment body pipeline, and the general replacement time is about 30 minutes.

[0048] Relevant explanation:

[0049] The assembly work of the rotating drag chain is usually completed at the production site of the supplier, the installation and replacement of the rotating drag chain are completed at the equipment installation site of the purchaser, and the improvement of the rotating drag chain can greatly improve the assembly efficiency of the equipment installation site, shorten the delivery cycle and maintenance cycle of the equipment, and reduce the operating cost.

[0050] The rotating drag chain assembled at the production site of the supplier is transported to the equipment installation site as an independent module together with other modules of the whole equipment, and an assembly engineer assembles the whole equipment, before the improvement of the rotating drag chain, the assembly engineer needs to thread the pipeline of the rotating drag chain at the installation site, and generally needs to spend about 2 hours, after the improvement, the rotating drag chain is a separate module with the pipeline threaded, and only needs to connect the pipeline of the rotating drag chain with the pipeline of the equipment body through the quick plug interface, so that the installation time is only about 15 minutes, 87.5% of the installation time is saved, and the work efficiency of the assembly engineer at the customer installation site is improved.

[0051] The improved rotating drag chain provided by the utility model realizes the fixing of the pipeline in the rotating drag chain through the threading hole plate 22 arranged on the pipe fixing block 2, prevents the pipeline from being wound or falling off in the running process of the rotating drag chain, and simultaneously prevents the overfolding of the rotating drag chain through the arrangement of the limiting block 3.

[0052] The improved rotating drag chain provided by the utility model realizes the integrated design of the rotating drag chain and the pipeline, each pipeline in the rotating drag chain is connected with the corresponding pipeline outside through a conversion joint, quick pipeline disconnection and connection can be realized, so that the pipeline replacement is realized, if part of the pipelines in the rotating drag chain need to be replaced, the rotating drag chain including the pipelines is replaced as a whole, so that the maintenance efficiency of the equipment can be improved.

[0053] In the embodiments of the utility model, the term "a plurality of" refers to two or more than two, unless otherwise explicitly limited. The terms "mounting", "connecting", "fixing" and the like should be understood in a broad sense, for example, "connecting" can be fixed connection, can also be detachable connection, or integrally connected. For ordinary skilled in the art, the specific meaning of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.

[0054] In the description of the embodiments of the utility model, it is understood that the orientation or position relationship indicated by the terms "upper", "lower" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the embodiments of the utility model and simplifying the description, and does not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the embodiments of the utility model.

[0055] In the description of the present specification, the description of the terms "one embodiment", "one preferred embodiment" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the utility model. In the present specification, the illustrative description of the above terms does 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.

[0056] The above embodiments only illustrate the technical idea of the utility model, and cannot limit the protection scope of the utility model, any modification made on the basis of the technical scheme according to the technical idea of the utility model falls within the protection scope of the utility model; the technologies not involved in the utility model can be realized by the prior art.

Claims

1. An improved rotary drag chain comprising a flexible connecting belt (1), an upper connecting plate (5), and a lower connecting plate (6), characterized in that: The flexible connection belt (1) is arranged with a plurality of pipeline fixing blocks (2), the threading hole plate (22) of the pipeline fixing block (2) is distributed with a plurality of threading holes (221), and the diameters of the threading holes (221) are inconsistent.

2. The improved rotary towed chain according to claim 1, characterized in that: Compared with any pipeline fixing block (2) on the improved rotary drag chain, the threading holes (221) with small diameters are located on the inner side of the improved rotary drag chain, and the threading holes (221) with large diameters are located on the outer side of the improved rotary drag chain.

3. The improved rotary towed chain according to claim 1, characterized in that: The pipeline fixing block (2) is composed of an integrally formed L-shaped plate (21) and a threading hole plate (22), the short side of the L-shaped plate (21) is vertically arranged to form the side of the pipeline fixing block (2), the long side of the L-shaped plate (21) forms the bottom surface of the pipeline fixing block (2), and the threading hole plate (22) is arranged perpendicular to the short side and the long side of the L-shaped plate (21) to be located in the space formed by the outer contour of the L-shaped plate (21).

4. The improved rotary towed chain according to claim 3, characterized in that: The upper two side edges of the side surface of the pipeline fixing block (2) are each provided with a protruding portion (211), and the two protruding portions (211) on the same pipeline fixing block (2) are symmetrically arranged; when the protruding portions (211) of adjacent two pipeline fixing blocks (2) abut against each other, a certain gap is formed between the side edges of the adjacent pipeline fixing blocks (2) except the protruding portions (211), so as to meet the requirement for the moving space when the flexible connection belt (1) moves, and the flexible connection belt (1) can form an arc.

5. The improved rotary towed chain according to claim 3, characterized in that: The bottom surface of the pipeline fixing block (2) is an isosceles trapezoid, the top end of the isosceles trapezoid is connected with the bottom end of the side surface of the pipeline fixing block (2) and faces the inner side of the rotary drag chain, and the bottom end of the isosceles trapezoid faces the outer side of the rotary drag chain; when a plurality of pipeline fixing blocks (2) are arranged on the flexible connection belt (1), the two waist portions of the bottom surface of any pipeline fixing block (2) are respectively adjacent to the waist portions of the bottom surfaces of the pipeline fixing blocks (2) on the sides.

6. The improved rotary towed chain according to claim 1, characterized in that: The two adjacent edges of the threading hole plate (22) are respectively connected with the short side and the long side of the L-shaped plate (21) perpendicularly, at this time, the threading holes (221) with smaller diameters are arranged near the corners of the L-shaped plate (21), and the threading holes (221) with larger diameters are arranged away from the L-shaped plate (21).

7. The improved rotary towed chain according to claim 1, characterized in that: The pipeline fixing block (2) is made of nylon material by 3D printing.

8. The improved rotary towed chain according to any one of claims 1-7, characterized in that: Any pipeline fixing block (2) is respectively provided with a clamping plate (4) and a limiting block (3), the clamping plate (4) and the pipeline fixing block (2) clamp the flexible connection belt (1) therebetween, and the three are fixedly connected through bolts, and the limiting block (3) located on the outer side of the clamping plate (4) is directly fixed on the bottom surface of the pipeline fixing block (2).

9. The improved rotary towed chain according to claim 8, characterized in that: The two end surfaces of the limiting block (3) are provided with inclined surfaces (31), and the bending of the flexible connection belt (1) reaches the limit position when the inclined surfaces (31) of adjacent two limiting blocks (3) abut against each other.

10. The improved rotary towed chain according to claim 1, characterized in that: The flexible connection belt (1) is spirally arranged around the periphery of a DD motor, the upper end of the flexible connection belt (1) is connected with the mover end of the DD motor through an upper connecting plate (5), and the lower end of the flexible connection belt (1) is connected with the stator end of the DD motor through a lower connecting plate (6).

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