Cable and processing device thereof

Abstract

The invention discloses a cable and a processing device thereof, and belongs to the technical field of cables, the cable comprises a cable core, a sheath and a filling material, the sheath is arranged on the outer surface of the cable core, the filling material is arranged between the cable core and the sheath, the cable further comprises a buffer mechanism, and the buffer mechanism comprises an outer air bag and an inner air bag, the outer air bag is arranged in the sheath; the buffer cylinder is positioned in the sheath and is in contact with the surface of the cable core; the fins are fixed with the inner surface of the buffer cylinder; the inner air bag is located in the buffer cylinder and makes contact with the surfaces of the fins; and the connecting pipe is used for communicating the outer air bag with the inner air bag. The problems that an existing cable is insufficient in protection performance and cannot well adapt to thermal expansion and cold contraction are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and more particularly to a cable and a processing device thereof. Background Art

[0002] Cable is an electrical device used to transmit electrical energy, electrical signals and realize electromagnetic energy conversion. It is made of one or more mutually insulated conductors and an outer insulating protective layer. Cables are usually composed of conductors, insulating layers, shielding layers and sheaths. The conductor is generally made of copper or aluminum with high electrical conductivity; the insulating layer is used to isolate the conductor from the outside world, and the materials include polyethylene, cross-linked polyethylene, etc.; the shielding layer can reduce electromagnetic interference and is woven from metal foil or metal wire; the sheath layer plays a protective role, and is commonly made of polyvinyl chloride, polyethylene and other materials.

[0003] In order to protect the cable, the outer surface of the cable is generally provided with a sheath and an armor layer. However, during the laying and use of the cable, it may be subjected to external impacts such as digging, squeezing, stretching, etc., and the protection provided by the sheath and armor layer alone is not enough. In addition, the cable will generate heat and expand when the current passes through it, and will shrink when it stops running or the ambient temperature drops. However, the existing cable has a simple structure and cannot adapt to thermal expansion and contraction well.

[0004] In view of this, the present invention provides a novel cable and a processing device thereof. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a cable and a processing device thereof, which solves the problem that the existing cables are not sufficiently protective and cannot adapt well to thermal expansion and contraction.

[0006] To achieve the above object, the present invention provides the following technical solutions: A cable comprises a cable core, a sheath and a filling material, wherein the sheath is arranged on the outer surface of the cable core, the filling material is arranged between the cable core and the sheath, and further comprises a buffer mechanism, wherein the buffer mechanism comprises: an outer air bag, the outer air bag being arranged in the sheath; A buffer tube, the buffer tube is located in the sheath and in contact with the surface of the cable core; A fin, wherein the fin is fixed to the inner surface of the buffer cylinder; An inner air bag, the inner air bag is located in the buffer tube and contacts the surface of the fin; A connecting tube is used to connect the outer airbag with the inner airbag.

[0007] It is further preferred that: one side of the fin is fixed to the inner surface of the buffer tube, and the other side is obliquely arranged in a direction close to the inner airbag; A plurality of fins are provided, and the plurality of fins are evenly distributed around the inner air bag.

[0008] It is further preferred that: the buffer tube and the fins are both made of flexible materials; or The buffer cylinder is made of a flexible material, and the fin is a spring.

[0009] It is further preferred that: the sheath comprises an outer sheath, a steel belt armor layer, a honeycomb sheath and an inner liner arranged in sequence from the outside to the inside; The inner surface of the honeycomb sleeve is evenly distributed with a plurality of receiving grooves, the outer airbag is received in the receiving grooves, and the outer surface of the outer airbag is in contact with the inner liner.

[0010] Further preferably, a plurality of the cable cores are provided, and the buffer tube is provided between the plurality of the cable cores.

[0011] A cable processing device, used for the cable, the processing device is used to install the inner air bag in the buffer cylinder; The processing device comprises: Base plate; A feeding rod, used for feeding the uninflated inner air bag into the buffer cylinder from one end thereof; A receiving rod, used to extend from the other end of the buffer tube and receive the inner air bag on the feeding rod and then move back until the inner air bag passes from one end of the buffer tube to the other end; A driving device is mounted on the bottom plate and is used to drive the feeding rod and the receiving rod to move away from or closer to each other.

[0012] It is further preferred that: a guide ring and a fixing ring are provided on the feeding rod, the guide ring is fixed on the surface of the feeding rod and is used for the inner airbag to pass through, the inner airbag passes through the guide ring and the fixing ring in sequence, and the end of the inner airbag is detachably connected to the fixing ring; A positioning ring is fixed on the fixing ring, and the positioning ring is used to be sleeved on the feeding rod or the receiving rod.

[0013] Further preferably, the feeding rod and the receiving rod are respectively located at two ends of the buffer tube, a sliding rod which can be extended into the feeding rod is arranged at one end of the feeding rod close to the receiving rod, the positioning ring is sleeved on the sliding rod, and a notch is opened at the end of the feeding rod; An insert rod is fixed to one end of the receiving rod near the feeding rod, and the insert rod is used to pass through the positioning ring and push the sliding rod into the feeding rod. A limit block is fixed on the insert rod, which is used to pass through the positioning ring and insert into the notch. The limit block is arranged at one end of the insert rod and is used to limit the positioning ring from separating from the insert rod.

[0014] Further preferably, a plurality of convex strips are evenly distributed on the circumferential surface of the slide bar, and the convex strips are located between the inner surface of the positioning ring and the outer surface of the slide bar; A blind hole is formed at one end of the feeding rod close to the receiving rod, the sliding rod extends into the blind hole, a spring is arranged in the blind hole, one end of the spring is fixed to the sliding rod, and the other end is fixed to the bottom of the blind hole. It is further preferred that: the driving device comprises: A shell, the shell being fixed on the bottom plate; A motor, the motor is located at one end of the housing and mounted on the bottom plate; A bidirectional screw, the bidirectional screw being located in the housing and having one end connected to the motor output shaft; Two moving blocks are respectively sleeved on the bidirectional lead screw and respectively cooperate with two sections of threads of the bidirectional lead screw with opposite rotation directions. The two moving blocks are respectively slidably cooperated with the shell, and the feeding rod and the receiving rod are respectively fixed to the two moving blocks.

[0015] In summary, the present invention has the following beneficial effects: (1) The cable of the present invention has fins, an outer air bag and an inner air bag. The fins are mainly used to absorb external forces, and the outer air bag and the inner air bag are mainly used to transmit forces and absorb part of the external forces at the same time. Therefore, no matter whether the force transmission direction is from inside to outside or from outside to inside, it can play a good buffering role and has good protection. This solves the problem that the existing cables are not sufficiently protective and cannot adapt to thermal expansion and contraction well.

[0016] (2) The processing device of the present invention adopts a method of feeding at one end and taking out at the other end, which effectively reduces the length of the feeding rod and the stroke of the feeding rod, and is simple and convenient to operate. In addition, the feeding rod and the receiving rod have simple structures, and the feeding and receiving stability are relatively strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional schematic diagram in the embodiment, which is mainly used to illustrate the internal structure of the cable; Figure 2 It is a cross-sectional schematic diagram in the embodiment, which is mainly used to illustrate the internal structure of the buffer cylinder; Figure 3 It is a structural schematic diagram of the embodiment, which is mainly used to reflect the overall structure of the processing device; Figure 4 It is a top view schematic diagram in the embodiment, mainly used to illustrate the structure of the processing device; Figure 5 It is a cross-sectional schematic diagram in the embodiment, which is mainly used to illustrate the internal structure of the housing; Figure 6It is a structural schematic diagram of the embodiment, which is mainly used to reflect the structure of the bidirectional lead screw; Figure 7 It is a structural schematic diagram of the embodiment, which is mainly used to reflect the installation structure of the guide ring, the fixing ring and the positioning ring; Figure 8 It is a partial structural diagram of the embodiment, which is mainly used to reflect the matching structure of the feeding rod, the positioning ring and the sliding rod; Fig. 9 It is a partial structural diagram of the embodiment, which is mainly used to reflect the matching structure of the feeding rod and the sliding rod; Fig.10 It is a cross-sectional schematic diagram in the embodiment, which is mainly used to illustrate the connection structure between the feeding rod and the sliding rod; Fig.11 It is a partial structural schematic diagram in the embodiment, which is mainly used to illustrate the structure of the material receiving rod.

[0018] In the figure, 101, outer sheath; 102, steel belt armor layer; 103, honeycomb sleeve; 104, inner lining; 2, filling material; 3, cable core; 41, outer air bag; 42, buffer tube; 43, fin; 44, inner air bag; 5, bottom plate; 6, base; 71, shell; 72, bidirectional screw; 73, motor; 741, first moving block; 742, second moving block; 75, connecting rod; 8, feeding rod; 9, receiving rod; 10, guide ring; 11, fixing ring; 12, tightening screw; 13, positioning ring; 14, sliding rod; 15, convex strip; 16, notch; 17, blind hole; 18, spring; 19, slideway; 20, plug rod; 21, limit block. DETAILED DESCRIPTION

[0019] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments.

[0020] Embodiment 1: A cable and a processing device, such as Figure 1-2 As shown, the cable includes a cable core 3, a sheath, a filling material 2 and a buffer mechanism.

[0021] There are multiple cable cores 3, specifically, there are three cable cores 3. The cable core 3 includes a copper conductor, an inner semiconductor shielding layer, an insulating layer, an outer shielding layer and a copper tape, and the inner semiconductor shielding layer, the insulating layer, the outer shielding layer and the copper tape are sequentially coated on the outer surface of the copper conductor from the inside to the outside. The insulating layer is made of cross-linked polyethylene, and the materials of the inner semiconductor shielding layer and the outer shielding layer are not limited here.

[0022] The sheath is coated on the outer surface of the three cable cores 3. Preferably, the sheath includes an outer sheath 101, a steel belt armor layer 102, a honeycomb sheath 103 and an inner liner 104 arranged in sequence from the outside to the inside. The honeycomb sheath 103 is provided to absorb the external force on the cable, prevent the external force from directly acting on the internal structure of the cable, and avoid problems such as deformation of the wire core and damage to the insulation layer. To this end, the honeycomb sheath 103 is made of flexible materials such as rubber or silicone to better absorb external forces such as digging, extrusion, and stretching. The materials of the outer sheath 101 and the inner liner 104 are not limited here.

[0023] Furthermore, the honeycomb sleeve 103 has a compression strength of 10-20 kPa, a compression rate of 15-30%, and a rebound rate of ≥90%.

[0024] The filling material 2 is filled between the cable core 3 and the sheath. The filling material 2 is preferably a filling rope. In order to achieve a better flame retardant effect, in this embodiment, a flame retardant or other fillers with a certain flame retardant effect can also be added to the filling material 2, so that the cable has a certain flame retardancy. Similarly, other fillers with specific functions can also be added to the filling material 2 to improve the overall performance of the cable.

[0025] Reference Figure 1-2 , the buffer mechanism includes an outer airbag 41, a buffer tube 42, fins 43, an inner airbag 44 and a connecting pipe (not shown in the figure). The outer airbag 41 is arranged in the sheath. Specifically, a plurality of receiving grooves are evenly distributed on the inner surface of the honeycomb sleeve 103. The outer airbag 41 is accommodated in the receiving groove, and the outer surface of the outer airbag 41 is in contact with the outer lining 104. In this way, the three cable cores 3 will be surrounded by the outer airbags 41. No matter from which direction the external force is applied, the outer airbag 41 and the honeycomb sleeve 103 can play a good buffering role. The buffer tube 42 is located inside the sheath and contacts the copper belt on the surface of the cable core 3. The length direction of the buffer tube 42 is consistent with the length direction of the cable. Preferably, the buffer tube 42 is arranged between the three cable cores 3, and the three cable cores 3 are evenly distributed around the surface of the buffer tube 42 along the circumferential direction of the buffer tube 42. The fin 43 is fixed to the inner surface of the buffer tube 42, and the inner airbag 44 is located in the buffer tube 42 and contacts the surface of the fin 43. Preferably, one side of the fin 43 is fixed to the inner surface of the buffer tube 42, and the other side is obliquely arranged in a direction close to the inner airbag 44. A plurality of fins 43 are provided, and the plurality of fins 43 are evenly distributed around the inner airbag 44. The connecting tube is used to connect the outer airbag 41 with the inner airbag 44, that is, one end of the connecting tube is connected to the outer airbag 41, and the other end is connected to the inner airbag 44.

[0026] In the specific implementation process, multiple outer airbags 41 can be connected in sequence through a connecting pipe, the connecting pipe is pre-buried between the honeycomb sleeve 103 and the inner liner 104, and then one of the outer airbags 41 is connected to the inner airbag 44 through a connecting pipe, that is, multiple outer airbags 41 are connected in series; or, each outer airbag 41 is connected to the inner airbag 44 through a connecting pipe, that is, multiple outer airbags 41 are connected in parallel. Preferably, each outer airbag 41 is independently formed into a cavity, and is interconnected through a connecting pipe, and one of the outer airbags 41 is connected to the inner airbag 44 through a connecting pipe.

[0027] It should be noted that, since the cable is very long, several outer airbags 41 and inner airbags 44 may be set along the length of the cable, and there are multiple connection methods. As long as the gas between the outer airbag 41 and the inner airbag 44 can be transmitted through the connecting pipe, the specific connection method is not limited in this embodiment.

[0028] Preferably, holes matching the connecting tube are provided on the inner liner 104 and the buffer tube 42 , one end of the connecting tube is connected to the outer airbag 41 , and the other end passes through the holes on the inner liner 104 and the buffer tube 42 in turn and is then connected to the inner airbag 44 .

[0029] In order to improve the service life of the buffer tube 42 and the fin 43 and to achieve a good buffering effect, preferably, the buffer tube 42 and the fin 43 are made of flexible material, and the buffer tube 42 and the fin 43 are integrally formed. Preferably, the deformation of the fin 43 is 15-25%.

[0030] In the above technical scheme, the purpose of the present invention is to solve the problem that the existing cables are not sufficiently protective and cannot adapt to thermal expansion and contraction well. When the cable is impacted by external force, the force is transmitted from the outside to the inside. When the cable heats up and expands, the force is transmitted from the inside to the outside. In order to play a two-way buffering role, the present invention provides a new buffer mechanism. When the cable is impacted by external force, the honeycomb sleeve 103 will offset part of the external force. The honeycomb sleeve 103 will gradually shrink in the process of offsetting the external force, thereby squeezing the outer airbag 41. Since the outer airbag 41 is connected to the inner airbag 44, when the outer airbag 41 is squeezed, the gas will be gradually transported to the inner airbag 44. At this time, the inner airbag 44 gradually expands, thereby pushing the fins 43 outward. At this time, the fins 43 will adapt to the expansion of the inner airbag 44 by deformation, thereby offsetting the remaining external force. On the contrary, when the cable core 3 heats up and expands, the three cable cores 3 squeeze the buffer tube 42 inward, and the fins 43 offset part of the external force. In the process of offsetting the external force, the fins 43 gradually squeeze the inner airbag 44. Since the outer airbag 41 is connected to the inner airbag 44, when the inner airbag 44 is squeezed, the gas will be gradually transported to the outer airbag 41. At this time, the outer airbag 41 gradually expands, thereby pushing the honeycomb sleeve 103 outward. At this time, the honeycomb sleeve 103 will adapt to the expansion of the outer airbag 41 by deformation, thereby offsetting the remaining external force. In this process, the honeycomb sleeve 103 and the fins 43 are mainly used for external force absorption, and the outer airbag 41 and the inner airbag 44 are mainly used for force transmission and absorb part of the external force. Therefore, no matter whether the force transmission direction is from inside to outside or from outside to inside, it can play a good buffering role.

[0031] The cable built-in double airbag system of the present invention needs to achieve bidirectional pressure buffering, that is, external extrusion and internal thermal expansion and contraction. Further, the number of external airbags 41 is dynamically adapted according to the outer diameter of the cable. Generally, a 30 mm cable is provided with six external airbags 41, which are evenly distributed at 60°.

[0032] Preferably, the initial volume of a single outer airbag 41 is 3-5 mL, and the compression rate of a single outer airbag 41 is ≤30%, that is, the volume after compression is ≥2.1-3.5 mL; the initial volume of the inner airbag 44 is 20-25 mL, and the initial volume of the inner airbag 44 is not less than 80% of the total volume of the outer airbag 41 to ensure sufficient buffering during pressure transmission. When the six outer airbags 41 are compressed by 30%, the expansion volume of the inner airbag 44 should be able to accommodate about 5-7 mL of gas.

[0033] Preferably, the triggering pressure threshold of the outer airbag 41 is 8-12 kPa, and the triggering pressure threshold of the inner airbag 44 is 5-8 kPa.

[0034] A processing device, such as Figure 2-11As shown, the processing device is used to install the inner airbag 44 in the buffer cylinder 42. The processing device includes a bottom plate 5, a feeding rod 8, a receiving rod 9 and a driving device. The feeding rod 8 is used to feed the inner airbag 44 that is not inflated and squeezed into a strip from one end of the buffer cylinder 42, and the receiving rod 9 is used to extend from the other end of the buffer cylinder 42 and receive the inner airbag 44 on the feeding rod 8 and then move back until the inner airbag 44 passes from one end of the buffer cylinder 42 to the other end. The driving device is installed on the bottom plate 5 and is used to drive the feeding rod 8 and the receiving rod 9 to move away from or close to each other.

[0035] Preferably, two bases 6 are fixed on the bottom plate 5 , and the two bases 6 are both located between the feeding rod 8 and the receiving rod 9 and are used to support the buffer cylinder 42 . The buffer cylinder 42 is horizontally placed on the two bases 6 .

[0036] Preferably, the driving device includes a housing 71, a motor 73, a bidirectional lead screw 72 and a moving block. The housing 71 is located at one side of the buffer cylinder 42 and fixed on the base plate 5, and the motor 73 is located at one end of the housing 71 and mounted on the base plate 5. The bidirectional lead screw 72 is located in the housing 71 and one end is connected to the output shaft of the motor 73, and the other end is inserted into the inner wall of the housing 71. The length direction of the bidirectional lead screw 72 is consistent with the length direction of the buffer cylinder 42. There are two moving blocks, that is, the moving block includes a first moving block 741 and a second moving block 742. The first moving block 741 and the second moving block 742 are respectively sleeved on the bidirectional lead screw 72 and respectively cooperate with two sections of threads of opposite rotation directions of the bidirectional lead screw 72, that is, one of the two moving blocks has a right-handed threaded hole and the other has a left-handed threaded hole. The specific threaded hole rotation directions of the first moving block 741 and the second moving block 742 are not limited here. The first moving block 741 and the second moving block 742 are respectively slidably matched with the housing 71. Specifically, a slide groove is provided on the inner wall of the housing 71, and the length direction of the slide groove is consistent with the length direction of the bidirectional lead screw 72. The first moving block 741 and the second moving block 742 are both provided with a slide bar adapted to the slide groove, and the slide bar is located in the slide groove. The first moving block 741 and the second moving block 742 are both fixed with a connecting rod 75, and the connecting rod 75 is used to connect the first moving block 741 and the feeding rod 8, and the second moving block 742 and the receiving rod 9. The housing 71 is provided with an opening for the connecting rod 75 to extend outward on one side close to the buffer cylinder 42.

[0037] In the above technical solution, when the motor 73 is started, the bidirectional screw 72 will rotate in the shell 71. Since the first moving block 741 and the second moving block 742 are respectively mounted on the bidirectional screw 72 and respectively cooperate with the two sections of threads of the bidirectional screw 72 with opposite rotation directions, when the bidirectional screw 72 rotates, the first moving block 741 and the second moving block will drive the feeding rod 8 and the receiving rod 9 to move closer to or away from each other.

[0038] Preferably, a guide ring 10 and a fixing ring 11 are provided on the feeding rod 8. The guide ring 10 is fixed on the surface of the feeding rod 8 and is used for the inner airbag 44 to pass through. Specifically, the guide ring 10 can be provided on the upper surface of the feeding rod 8 or on the lower surface, and the specific details are not limited. The inner airbag 44 passes through the guide ring 10 and the fixing ring 11 in sequence, and one end of the inner airbag 44 is detachably connected to the fixing ring 11. Specifically, a threaded mounting hole is provided on the fixing ring 11, and a tightening screw 12 is installed in the threaded mounting hole. An end (not shown in the figure) is fixed on the tightening screw 12, and the end is located in the fixing ring 11 and is used to tighten the inner airbag 44. A positioning ring 13 is fixed on the fixing ring 11, and the positioning ring 13 is used to be sleeved on the feeding rod 8 or the receiving rod 9.

[0039] In the above technical solution, the guide ring 10 is mainly provided to guide the inner airbag 44 to extend into the buffer tube 42, and the fixing ring 11 is mainly provided to clamp the inner airbag 44 to prevent the inner airbag 44 from being separated from the positioning ring 13. During use, the inner airbag 44 that is not inflated and squeezed into a strip only needs to be passed through the guide ring 10 and the fixing ring 11 in sequence, and then the screw 12 is rotated to make the end gradually approach the inner airbag 44, so as to clamp the inner airbag 44 in the fixing ring 11. When disassembling, the inner airbag 44 can be taken out from the fixing ring 11 by simply rotating the screw 12 in the opposite direction, which is simple and convenient to use.

[0040] Reference Figure 6-10 The feeding rod 8 and the receiving rod 9 are respectively located at the two ends of the buffer tube 42, and the central axis of the feeding rod 8 coincides with the central axis of the receiving rod 9. The feeding rod 8 is provided with a slide bar 14 that can extend into the feeding rod 8 at one end close to the receiving rod 9. Preferably, a blind hole 17 is provided at one end of the feeding rod 8 close to the receiving rod 9, and the slide bar 14 extends into the blind hole 17. A spring 18 is provided in the blind hole 17, and one end of the spring 18 is fixed to the slide bar 14, and the other end is fixed to the bottom of the blind hole 17. The slide bar 14 is slidably matched with the inner wall of the blind hole 17. Specifically, a slideway 19 is provided on the inner wall of the blind hole 17, and the length direction of the slideway 19 is consistent with the length direction of the feeding rod 8. A slider matched with the slideway 19 is provided at one end of the slide bar 14 close to the spring 18, and the slider slides in the slideway 19. The positioning ring 13 is sleeved on the slide bar 14. In order to better insert the material receiving rod 9 into the positioning ring 13 for receiving the material, preferably, the inner diameter of the positioning ring 13 is larger than the diameter of the slide bar 14, and the circumferential surface of the slide bar 14 is evenly distributed with a plurality of ridges 15. The length direction of the ridges 15 is consistent with the length direction of the slide bar 14, and the ridges 15 are located between the inner surface of the positioning ring 13 and the outer surface of the slide bar 14. In order to enable the slide bar 14 to drive the ridges 15 to synchronously extend into the blind hole 17, specifically, the inner wall of the blind hole 17 is provided with a groove adapted to the ridges 15. A notch 16 is provided at the end of the feeding rod 8, and two notches 16 are provided, and the two notches 16 are respectively located at the upper and lower sides of the end of the feeding rod 8.

[0041] Reference Figure 6 ,9 , 11, an insert rod 20 is fixed to one end of the receiving rod 9 close to the feeding rod 8, and the insert rod 20 is used to pass through the positioning ring 13 and push the sliding rod 14 into the feeding rod 8. Preferably, the diameter of the insert rod 20 is smaller than the diameter of the sliding rod 14, and the central axis of the insert rod 20 coincides with the central axis of the sliding rod 14. A limit block 21 is fixed on the insert rod 20 for passing through the positioning ring 13 and inserting into the notch 16. The limit block 21 is arranged on the upper and lower sides of the end of the insert rod 20 close to the feeding rod 8, and the limit block 21 is used to limit the positioning ring 13 from being separated from the insert rod 20. Preferably, the limit block 21 is an annular block and its outer diameter is less than or equal to the inner diameter of the positioning ring 13, so that the limit block 21 passes through the positioning ring 13 and enters the notch 16.

[0042] In the above technical solution, when the feeding rod 8 and the receiving rod 9 are close to each other, the insertion rod 20 and the stopper 21 on the receiving rod 9 will pass through the positioning ring 13 and push the slide bar 14 into the feeding rod 8. When the stopper 21 passes through the positioning ring 13 and is inserted into the notch 16, the positioning ring 13 will fall onto the insertion rod 20 under its own gravity. At this time, the positioning ring 13 is sleeved on the insertion rod 20. As the feeding rod 8 and the receiving rod 9 move away from each other, the slide bar 14 is reset under the action of the spring 18, and the fixing ring 11 with the inner air bag 44 will continue to extend to the other end of the buffer tube 42 under the drive of the receiving rod 9 until the inner air bag 44 enters the buffer tube 42 completely.

[0043] Since the buffer tube 42 is a slender structure, it is difficult to manually insert the inner air bag 44 into the buffer tube 42. Therefore, the present invention provides a processing device, which can effectively insert the inner air bag 44 into the buffer tube 42. In addition, the processing device adopts a method of feeding at one end and taking out at the other end. The feeding rod 8 does not need to pass through the buffer tube 42, which effectively reduces the length of the feeding rod 8 and makes the operation more controllable.

[0044] After the inner airbag 44 is inserted into the buffer tube 42 , the inner airbag 44 needs to be inflated so that the inner airbag 44 contacts the fins 43 on the buffer tube 42 .

[0045] Embodiment 2: A cable and a processing device thereof, which is different from Embodiment 1 in that the fin 43 is a spring and is fixed in the buffer tube 42 through a subsequent processing process.

[0046] The spring sheet has better elasticity, so the cable buffering performance of this embodiment is stronger.

[0047] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A cable, comprising a cable core (3), a sheath and a filling material (2), wherein the sheath is arranged on the outer surface of the cable core (3), and the filling material (2) is arranged between the cable core (3) and the sheath, characterized in that: Also included is a buffer mechanism, the buffer mechanism comprising: An outer air bag (41), the outer air bag (41) being arranged in the sheath; A buffer tube (42), the buffer tube (42) being located inside the sheath and in contact with the surface of the cable core (3); A fin (43), wherein the fin (43) is fixed to the inner surface of the buffer cylinder (42); An inner air bag (44), the inner air bag (44) being located in the buffer cylinder (42) and in contact with the surface of the fin (43); A connecting pipe, the connecting pipe is used to connect the outer air bag (41) with the inner air bag (44).

2. A cable according to claim 1, characterized in that: One side of the fin (43) is fixed to the inner surface of the buffer tube (42), and the other side is arranged obliquely in a direction close to the inner air bag (44); A plurality of fins (43) are provided, and the plurality of fins (43) are evenly distributed around the inner air bag (44).

3. A cable according to claim 1, characterized in that: The buffer cylinder (42) and the fins (43) are both made of flexible materials; or The buffer cylinder (42) is made of a flexible material, and the fin (43) is a spring.

4. A cable according to claim 1, characterized in that: The sheath comprises an outer sheath (101), a steel belt armor layer (102), a honeycomb sheath (103) and an inner lining (104) which are arranged in sequence from the outside to the inside; The inner surface of the honeycomb sleeve (103) is evenly distributed with a plurality of receiving grooves, the outer airbag (41) is received in the receiving grooves, and the outer surface of the outer airbag (41) is in contact with the inner liner (104).

5. A cable according to claim 4, characterized in that: A plurality of the cable cores (3) are provided, and the buffer tube (42) is provided between the plurality of the cable cores (3).

6. A cable processing device, used for the cable according to any one of claims 1 to 5, characterized in that: The processing device is used to install the inner air bag (44) in the buffer cylinder (42); The processing device comprises: Bottom plate (5); A feeding rod (8) for feeding the uninflated inner air bag (44) into the buffer cylinder (42) from one end thereof; A receiving rod (9) is used to extend from the other end of the buffer tube (42) and receive the inner air bag (44) on the feeding rod (8) and then move back until the inner air bag (44) passes from one end of the buffer tube (42) to the other end; A driving device, the driving device is mounted on the bottom plate (5) and is used to drive the feeding rod (8) and the receiving rod (9) to move away from or towards each other.

7. A cable processing device according to claim 6, characterized in that: The feeding rod (8) is provided with a guide ring (10) and a fixing ring (11); the guide ring (10) is fixed to the surface of the feeding rod (8) and is used for the inner airbag (44) to pass through; the inner airbag (44) passes through the guide ring (10) and the fixing ring (11) in sequence; and the end of the inner airbag (44) is detachably connected to the fixing ring (11); A positioning ring (13) is fixed on the fixing ring (11), and the positioning ring (13) is used to be sleeved on the feeding rod (8) or the receiving rod (9).

8. A cable processing device according to claim 7, characterized in that: The feeding rod (8) and the receiving rod (9) are respectively located at two ends of the buffer tube (42); a sliding rod (14) which can extend into the interior of the feeding rod (8) is provided at one end of the feeding rod (8) close to the receiving rod (9); the positioning ring (13) is sleeved on the sliding rod (14); and a notch (16) is provided at the end of the feeding rod (8); An insert rod (20) is fixed to one end of the receiving rod (9) close to the feeding rod (8), and the insert rod (20) is used to pass through the positioning ring (13) and push the sliding rod (14) into the feeding rod (8). A limit block (21) is fixed to the insert rod (20) and is used to pass through the positioning ring (13) and insert into the notch (16). The limit block (21) is arranged at one end of the insert rod (20) and is used to limit the positioning ring (13) from being separated from the insert rod (20).

9. A cable processing device according to claim 8, characterized in that: A plurality of convex strips (15) are evenly distributed on the circumferential surface of the slide rod (14), and the convex strips (15) are located between the inner surface of the positioning ring (13) and the outer surface of the slide rod (14); A blind hole (17) is formed at one end of the feeding rod (8) close to the receiving rod (9), the sliding rod (14) extends into the blind hole (17), a spring (18) is arranged in the blind hole (17), one end of the spring (18) is fixed to the sliding rod (14), and the other end is fixed to the bottom of the blind hole (17).

10. A cable processing device according to claim 6, characterized in that: The driving device comprises: A shell (71), the shell (71) being fixed on the bottom plate (5); A motor (73), the motor (73) being located at one end of the housing (71) and mounted on the bottom plate (5); a bidirectional lead screw (72), the bidirectional lead screw (72) being located in the housing (71) and having one end connected to an output shaft of the motor (73); Two moving blocks, the two moving blocks are respectively sleeved on the bidirectional lead screw (72) and respectively cooperate with two sections of threads of the bidirectional lead screw (72) with opposite rotation directions, the two moving blocks are respectively slidably cooperated with the housing (71), and the feeding rod (8) and the receiving rod (9) are respectively fixed to the two moving blocks.

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