A cable and its processing device

Abstract

The present invention discloses a cable and its processing device, belonging to the technical field of cables. The cable includes a cable core, a sheath, and a filling material. The sheath is disposed on the outer surface of the cable core, and the filling material is disposed between the cable core and the sheath. The cable further includes a buffer mechanism, which includes: an outer airbag disposed inside the sheath; a buffer cylinder located inside the sheath and in contact with the surface of the cable core; fins fixed to the inner surface of the buffer cylinder; an inner airbag located inside the buffer cylinder and in contact with the surface of the fins; and a connecting pipe for communicating the outer airbag with the inner airbag. The present invention solves the problems that the existing cable has insufficient protection and cannot adapt well to thermal expansion and contraction.

Description

Technical Field

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

[0002] A cable is an electrical equipment used for transmitting electrical energy, electrical signals and realizing electromagnetic energy conversion, which is made of one or more mutually insulated conductors and an outer insulating protective layer. A cable usually consists of a conductor, an insulating layer, a shielding layer and a sheath layer. 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, and the materials include polyethylene, cross-linked polyethylene, etc.; the shielding layer can reduce electromagnetic interference and is made of metal foil or metal wire braiding; the sheath layer plays a protective role, and commonly used materials are polyvinyl chloride, polyethylene, etc.

[0003] To protect the cable, a sheath and an armor layer are generally provided on the outer surface of the cable. However, the cable may be subjected to external force impacts such as excavation, extrusion, and stretching during laying and use. Relying only on the sheath and the armor layer for protection, the protection performance is insufficient. In addition, when the cable is running, it will heat up and expand due to the current passing through, and contract when it stops running or the ambient temperature decreases. The existing cable has a simple structure and cannot adapt well to thermal expansion and contraction.

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

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a cable and its processing device, which solves the problems that the existing cable has insufficient protection performance and cannot adapt well to thermal expansion and contraction.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A cable, comprising 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, and further comprises a buffer mechanism, and the buffer mechanism comprises:

[0008] An outer airbag, which is arranged in the sheath;

[0009] A buffer cylinder, which is located in the sheath and contacts the surface of the cable core;

[0010] Fins, which are fixed to the inner surface of the buffer cylinder;

[0011] An inner airbag, which is located in the buffer cylinder and contacts the surface of the fins;

[0012] A connecting pipe, which is used to connect the outer airbag and the inner airbag.

[0013] More preferably, one side of the fin is fixed to the inner surface of the buffer cylinder, and the other side is obliquely arranged in the direction close to the inner airbag.

[0014] A plurality of fins are provided, and the plurality of fins are evenly distributed around the inner airbag.

[0015] More preferably, both the buffer cylinder and the fins are made of flexible materials; or

[0016] The buffer cylinder is made of flexible material, and the fin is a spring piece.

[0017] More preferably, the sheath includes an outer sheath, a steel tape armor layer, a honeycomb sleeve and a lining arranged in sequence from outside to inside;

[0018] A plurality of accommodation grooves are evenly distributed on the inner surface of the honeycomb sleeve, the outer airbag is accommodated in the accommodation grooves, and the outer surface of the outer airbag contacts the lining.

[0019] More preferably, a plurality of cable cores are provided, and the buffer cylinder is arranged between the plurality of cable cores.

[0020] A processing device for the cable is used to install the inner airbag into the buffer cylinder;

[0021] The processing device includes:

[0022] A bottom plate;

[0023] A feeding rod for feeding the uninflated inner airbag into one end of the buffer cylinder;

[0024] A receiving rod for extending into the other end of the buffer cylinder, receiving the inner airbag on the feeding rod and moving back until the inner airbag passes through the buffer cylinder from one end to the other;

[0025] A driving device, which is installed on the bottom plate and is used to drive the feeding rod and the receiving rod to move away from or close to each other.

[0026] More preferably, a guiding ring and a fixing ring are arranged on the feeding rod. The guiding 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 guiding ring and the fixing ring in sequence, and the end of the inner airbag is detachably connected to the fixing ring;

[0027] A positioning ring is fixed on the fixing ring and is used to sleeve on the feeding rod or the receiving rod.

[0028] Further preferably, the feeding rod and the material receiving rod are respectively located at two ends of the buffer cylinder. A sliding rod that can extend into the interior of the feeding rod is provided at one end of the feeding rod close to the material receiving rod. The positioning ring is sleeved on the sliding rod, and a notch is formed at the end of the feeding rod.

[0029] A plug rod is fixed at one end of the material receiving rod close to the feeding rod. The plug rod is used to pass through the positioning ring and push the sliding rod into the feeding rod. A limiting block for passing through the positioning ring and inserting into the notch is fixed on the plug rod. The limiting block is arranged at one end of the plug rod and is used to prevent the positioning ring from detaching from the plug rod.

[0030] Further preferably, a plurality of convex strips are evenly distributed on the circumferential surface of the sliding rod, and the convex strips are located between the inner surface of the positioning ring and the outer surface of the sliding rod.

[0031] A blind hole is formed at one end of the feeding rod close to the material 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.

[0032] Further preferably, the driving device includes:

[0033] A housing fixed to the bottom plate;

[0034] A motor located at one end of the housing and mounted on the bottom plate;

[0035] A bidirectional lead screw located inside the housing and having one end connected to the output shaft of the motor;

[0036] Two moving blocks respectively sleeved on the bidirectional lead screw and respectively engaged with two sections of threads with opposite helix directions of the bidirectional lead screw. The two moving blocks are respectively in sliding fit with the housing. The feeding rod and the material receiving rod are respectively fixed to the two moving blocks.

[0037] In summary, the present invention has the following beneficial effects:

[0038] (1) The cable in the present invention has fins, an outer airbag and an inner airbag. The fins are mainly used for absorbing external forces, and the outer airbag and the inner airbag are mainly used for force transmission and also absorb part of the external forces. Therefore, no matter whether the force transmission direction is from inside to outside or from outside to inside, a good buffering effect can be achieved and the protection performance is better. It solves the problems that the existing cable has insufficient protection performance and cannot well adapt to thermal expansion and contraction.

[0039] (2) The processing device in the present invention adopts the method of feeding at one end and taking materials at the other end, effectively reducing the length of the feeding rod, reducing the stroke of the feeding rod, and being simple and convenient to operate. In addition, the structures of the feeding rod and the material receiving rod are simple, and the stability of feeding and material receiving is relatively strong. Brief Description of the Drawings

[0040] Figure 1 is a cross-sectional schematic diagram in the embodiment, mainly used to show the internal structure of the cable;

[0041] Figure 2 is a cross-sectional schematic diagram in the embodiment, mainly used to show the internal structure of the buffer cylinder;

[0042] Figure 3 is a structural schematic diagram in the embodiment, mainly used to show the overall structure of the processing device;

[0043] Figure 4 is a top view schematic diagram in the embodiment, mainly used to show the structure of the processing device;

[0044] Figure 5 is a cross-sectional schematic diagram in the embodiment, mainly used to show the internal structure of the housing;

[0045] Figure 6 is a structural schematic diagram in the embodiment, mainly used to show the structure of the bidirectional lead screw;

[0046] Figure 7 is a structural schematic diagram in the embodiment, mainly used to show the installation structure of the guide ring, fixed ring and positioning ring;

[0047] Figure 8 is a partial structural schematic diagram in the embodiment, mainly used to show the cooperation structure of the feeding rod, positioning ring and sliding rod;

[0048] Figure 9 is a partial structural schematic diagram in the embodiment, mainly used to show the cooperation structure of the feeding rod and the sliding rod;

[0049] Figure 10 is a cross-sectional schematic diagram in the embodiment, mainly used to show the connection structure between the feeding rod and the sliding rod;

[0050] Figure 11 is a partial structural schematic diagram in the embodiment, mainly used to show the structure of the receiving rod.

[0051] In the figure, 101 is the outer sheath; 102 is the steel tape armor layer; 103 is the honeycomb sleeve; 104 is the inner lining; 2 is the filling material; 3 is the cable core; 41 is the outer airbag; 42 is the buffer cylinder; 43 is the fin; 44 is the inner airbag; 5 is the bottom plate; 6 is the base; 71 is the housing; 72 is the bidirectional lead screw; 73 is the motor; 741 is the first moving block; 742 is the second moving block; 75 is the connecting rod; 8 is the feeding rod; 9 is the receiving rod; 10 is the guiding ring; 11 is the fixing ring; 12 is the tightening screw; 13 is the positioning ring; 14 is the sliding rod; 15 is the rib; 16 is the notch; 17 is the blind hole; 18 is the spring; 19 is the slideway; 20 is the inserting rod; 21 is the limiting block. Detailed implementation mode

[0052] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0053] Embodiment 1: A cable and a processing device, as Figure 1-2 shown, the cable includes a cable core 3, a sheath, a filling material 2 and a buffer mechanism.

[0054] A plurality of cable cores 3 are provided. Specifically, three cable cores 3 are provided. The cable core 3 includes a copper conductor, an inner semiconductor shielding layer, an insulating layer, an outer shielding layer and a copper tape. 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 herein.

[0055] The sheath is coated on the outer surfaces of the three cable cores 3. Preferably, the sheath includes an outer sheath 101, a steel tape armor layer 102, a honeycomb sleeve 103 and an inner lining 104 which are sequentially arranged from the outside to the inside. The purpose of setting the honeycomb sleeve 103 is to absorb the external force applied to the cable, prevent the external force from directly acting on the internal structure of the cable, and avoid problems such as the deformation of the wire core and the damage of the insulating layer. For this reason, the honeycomb sleeve 103 is made of a flexible material such as rubber or silica gel so as to better absorb external forces such as excavation, extrusion and stretching. The materials of the outer sheath 101 and the inner lining 104 are not limited herein.

[0056] Furthermore, the compression strength of the honeycomb sleeve 103 is 10 - 20 kPa, the compression ratio is 15 - 30%, and the rebound ratio ≥ 90%.

[0057] 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, a flame retardant or other fillers with a certain flame retardant effect can also be added to the filling material 2 in this embodiment 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.

[0058] Refer to 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.

[0059] 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.

[0060] 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.

[0061] 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 .

[0062] 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%.

[0063] In the above technical solution, the purpose of the present invention is to solve the problems that the existing cable has insufficient protection and cannot adapt well to thermal expansion and contraction. When the cable is impacted by external force, the force transmission direction is from outside to inside. When the cable heats up and expands, the force transmission direction is from inside to outside. In order to play a two-way buffering role, the present invention provides a new type of buffering mechanism. When the cable is impacted by external force, the honeycomb sleeve 103 will offset part of the external force. During the process of the honeycomb sleeve 103 offsetting the external force, it will gradually contract, thus squeezing the outer airbag 41. Since the outer airbag 41 is connected to the inner airbag 44, when the outer airbag 41 is squeezed, it will gradually transport the gas to the inner airbag 44. At this time, the inner airbag 44 will gradually expand, thus pushing the fin 43 outwards. At this time, the fin 43 will deform to adapt to the expansion of the inner airbag 44, thus 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 cylinder 42 inwards. The fin 43 will offset part of the external force. During the process of the fin 43 offsetting the external force, it will 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, it will gradually transport the gas to the outer airbag 41. At this time, the outer airbag 41 will gradually expand, thus pushing the honeycomb sleeve 103 outwards. At this time, the honeycomb sleeve 103 will deform to adapt to the expansion of the outer airbag 41, thus offsetting the remaining external force. During this process, the honeycomb sleeve 103 and the fin 43 are mainly used for absorbing external force, and the outer airbag 41 and the inner airbag 44 are mainly used for force transmission and also absorb part of the external force. Therefore, no matter whether the force transmission direction is from inside to outside or from outside to inside, a good buffering effect can be achieved.

[0064] The built-in dual airbag system of the cable in the present invention needs to achieve two-way pressure buffering, that is, external extrusion and internal thermal expansion and contraction. Further, the number of the outer airbags 41 is dynamically adapted according to the outer diameter of the cable. Generally, six outer airbags 41 are provided for a 30 mm cable and are evenly distributed at 60°.

[0065] Preferably, the initial volume of a single outer airbag 41 is 3 - 5 mL, and the compression rate of a single outer airbag 41 ≤ 30%, that is, the volume after compression ≥ 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 airbags 41 to ensure sufficient buffering during pressure conduction. When all six outer airbags 41 are compressed by 30%, the expansion amount of the inner airbag 44 should be able to accommodate about 5 - 7 mL of gas.

[0066] 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.

[0067] A processing device, such as Figure 2-11As shown in the figure, the processing device is used to install the inner airbag 44 into 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 non-inflated and extruded inner airbag 44 into one end of the buffer cylinder 42. The receiving rod 9 is used to extend into the buffer cylinder 42 from the other end, take over the inner airbag 44 on the feeding rod 8 and then move back until the inner airbag 44 passes through the buffer cylinder 42 from one end to the other. 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.

[0068] Preferably, two bases 6 are fixed on the bottom plate 5. Both of the two bases 6 are 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.

[0069] Preferably, the driving device includes a housing 71, a motor 73, a bidirectional lead screw 72 and moving blocks. The housing 71 is located on one side of the buffer cylinder 42 and is fixed on the bottom plate 5. The motor 73 is located at one end of the housing 71 and is installed on the bottom plate 5. The bidirectional lead screw 72 is located inside the housing 71, one end of which 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 blocks include 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 are respectively engaged with two sections of threads with opposite helix directions of the bidirectional lead screw 72. That is, among the two moving blocks, one has a right-handed threaded hole and the other has a left-handed threaded hole. The specific helix directions of the threaded holes 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 engaged with the housing 71. Specifically, a chute is provided on the inner wall of the housing 71, and the length direction of the chute is consistent with the length direction of the bidirectional lead screw 72. Sliding strips adapted to the chute are provided on both the first moving block 741 and the second moving block 742, and the sliding strips are located in the chute. Connecting rods 75 are fixed on both the first moving block 741 and the second moving block 742. The connecting rods 75 are used to connect the first moving block 741 and the feeding rod 8, and the second moving block 742 and the receiving rod 9. An opening for the connecting rod 75 to extend outwards is provided on the side of the housing 71 close to the buffer cylinder 42.

[0070] In the above technical solution, when the motor 73 is started, the bidirectional lead screw 72 will rotate inside the housing 71. Since the first moving block 741 and the second moving block 742 are respectively sleeved on the bidirectional lead screw 72 and are respectively engaged with two sections of threads with opposite helix directions of the bidirectional lead screw 72, when the bidirectional lead 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 close to or away from each other.

[0071] Preferably, a guiding ring 10 and a fixing ring 11 are arranged on the feeding rod 8. The guiding 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 guiding ring 10 can be arranged on the upper surface of the feeding rod 8 or the lower surface, and no specific limitation is made. The inner airbag 44 passes through the guiding ring 10 and the fixing ring 11 in sequence. One end of the inner airbag 44 is detachably connected to the fixing ring 11. Specifically, a threaded mounting hole is formed in the fixing ring 11, a tightening screw 12 is installed in the threaded mounting hole, and an end (not shown in the figure) is fixed on the tightening screw 12. The end is located inside the fixing ring 11 and is used to press against the inner airbag 44. A positioning ring 13 is fixed on the fixing ring 11, and the positioning ring 13 is used to sleeve on the feeding rod 8 or the receiving rod 9.

[0072] In the above technical solution, the guiding ring 10 is mainly provided to guide the inner airbag 44 to extend into the buffer cylinder 42, and the fixing ring 11 is mainly provided to clamp the inner airbag 44 to prevent the inner airbag 44 from detaching from the positioning ring 13. During use, only the non-inflated and extruded inner airbag 44 needs to pass through the guiding ring 10 and the fixing ring 11 in sequence, and then the tightening screw 12 is rotated to make the end gradually approach the inner airbag 44, so as to clamp the inner airbag 44 inside the fixing ring 11. When disassembling, only the tightening screw 12 needs to be rotated in the reverse direction to take out the inner airbag 44 from the fixing ring 11, which is simple and convenient to use.

[0073] Refer to Figure 6-10 As shown, the feeding rod 8 and the receiving rod 9 are respectively located at both ends of the buffer cylinder 42, and the central axes of the feeding rod 8 and the receiving rod 9 coincide. A sliding rod 14 that can extend into the feeding rod 8 is arranged at one end of the feeding rod 8 close to the receiving rod 9. Preferably, 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. The sliding rod 14 is in sliding fit with the inner wall of the blind hole 17. Specifically, a sliding track 19 is arranged on the inner wall of the blind hole 17, the length direction of the sliding track 19 is consistent with the length direction of the feeding rod 8, and a sliding block adapted to the sliding track 19 is arranged at one end of the sliding rod 14 close to the spring 18, and the sliding block slides in the sliding track 19. The positioning ring 13 is sleeved on the sliding rod 14. To better insert the receiving rod 9 into the positioning ring 13 for receiving materials, preferably, the inner diameter of the positioning ring 13 is larger than the diameter of the sliding rod 14, and a plurality of convex strips 15 are evenly distributed on the circumferential surface of the sliding rod 14. The length direction of the convex strips 15 is consistent with the length direction of the sliding rod 14, and the convex strips 15 are located between the inner surface of the positioning ring 13 and the outer surface of the sliding rod 14. To enable the sliding rod 14 to drive the convex strips 15 to extend into the blind hole 17 synchronously, specifically, a groove adapted to the convex strips 15 is formed on the inner wall of the blind hole 17. Two notches 16 are formed at the end of the feeding rod 8, and the two notches 16 are respectively located on the upper and lower sides of the end of the feeding rod 8.

[0074] Refer to 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.

[0075] 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.

[0076] 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.

[0077] 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 .

[0078] 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.

[0079] The spring sheet has better elasticity, so the cable buffering performance of this embodiment is stronger.

[0080] 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 disposed on the outer surface of the cable core (3), and the filling material (2) is disposed between the cable core (3) and the sheath, and is characterized in that: It further includes a buffer mechanism, and the buffer mechanism includes: An outer airbag (41), and the outer airbag (41) is arranged in the sheath; A buffer cylinder (42), and the buffer cylinder (42) is located inside the sheath and contacts the surface of the cable core (3); Fins (43), and the fins (43) are fixed to the inner surface of the buffer cylinder (42); An inner airbag (44), and the inner airbag (44) is located inside the buffer cylinder (42) and contacts the surface of the fins (43); A connecting pipe, and the connecting pipe is used to communicate the outer airbag (41) with the inner airbag (44); Both the buffer cylinder (42) and the fins (43) are made of flexible materials; or The buffer cylinder (42) is made of flexible materials, and the fins (43) are elastic sheets.

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

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

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

5. A processing device for a cable, for the cable according to any one of claims 1-4, characterized in that: The processing device is used to install the inner airbag (44) inside the buffer cylinder (42); The processing device includes: A bottom plate (5); A feeding rod (8), which is used to feed the uninflated inner airbag (44) into one end of the buffer cylinder (42); A receiving rod (9), which is used to extend into the buffer cylinder (42) from the other end, take over the inner airbag (44) on the feeding rod (8) and move back until the inner airbag (44) passes through the buffer cylinder (42) from one end to the other end; A driving device, which 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.

6. The processing device for a cable according to claim 5, characterized in that: A guiding ring (10) and a fixing ring (11) are arranged on the feeding rod (8), the guiding ring (10) is fixed on 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 guiding 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 sleeve on the feeding rod (8) or the receiving rod (9).

7. The processing device for a cable according to claim 6, characterized in that: The feeding rod (8) and the receiving rod (9) are respectively located at two ends of the buffer cylinder (42), a sliding rod (14) that can extend into the inside of the feeding rod (8) is arranged 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 formed at the end of the feeding rod (8); One end of the material receiving rod (9) close to the material feeding rod (8) is fixed with an insertion rod (20). The insertion rod (20) is used to pass through the positioning ring (13) and push the sliding rod (14) into the material feeding rod (8). A limiting block (21) for passing through the positioning ring (13) and inserting into the notch (16) is fixed on the insertion rod (20). The limiting block (21) is arranged at one end of the insertion rod (20) and is used to limit the positioning ring (13) from detaching from the insertion rod (20).

8. The processing device for a cable according to claim 7, characterized in that: A plurality of convex strips (15) are evenly distributed on the circumferential surface of the sliding rod (14). The convex strips (15) are located between the inner surface of the positioning ring (13) and the outer surface of the sliding rod (14). One end of the material feeding rod (8) close to the material receiving rod (9) is provided with a blind hole (17). 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).

9. The processing device for a cable according to claim 5, characterized in that: The driving device includes: A housing (71) fixed to the bottom plate (5). A motor (73) located at one end of the housing (71) and mounted on the bottom plate (5). A bidirectional lead screw (72) located in the housing (71) and having one end connected to the output shaft of the motor (73). Two moving blocks are respectively sleeved on the bidirectional lead screw (72) and are respectively in threaded engagement with two sections of threads with opposite helix directions of the bidirectional lead screw (72). The two moving blocks are respectively in sliding engagement with the housing (71). The material feeding rod (8) and the material receiving rod (9) are respectively fixed to the two moving blocks.

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