Aluminum-coated optical fiber composite overhead ground wire and extrusion molding equipment for outer-layer aluminum pipe of aluminum-coated optical fiber composite overhead ground wire

Abstract

The invention relates to the technical field of aluminum pipe extrusion, in particular to extrusion molding equipment for an aluminum-coated optical fiber composite overhead ground wire and an outer-layer aluminum pipe of the aluminum-coated optical fiber composite overhead ground wire, and the extrusion molding equipment comprises symmetrically arranged processing frames, a supporting rod and a fixed mold are fixed between the processing frames, a heating pipe communicated with the fixed mold is fixed on the supporting rod, and a piston cylinder is also fixed on each processing frame; the raw material transferring mechanism is arranged on the machining frame, a clamping assembly is arranged on the raw material transferring mechanism, a plurality of clamping plates which are circumferentially distributed at equal intervals are connected to the clamping assembly, and inclined plates are fixed to the clamping plates; the extrusion assembly is arranged on the supporting rod and used for pushing the raw materials between the clamping plates into the heating pipe; and the pumping mechanism is arranged on the piston cylinder and connected with the raw material transferring mechanism, a spray head is connected to the pumping mechanism, a follow-up translation assembly is arranged on the pumping mechanism, and the surface of the raw material can be coated with a lubricating agent before the raw material is pushed into the heating pipe, so that the raw material is prevented from being adhered to the inner wall of the heating pipe in the extrusion process.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum tube extrusion, in particular to an extrusion molding device for an aluminum-clad optical fiber composite overhead ground wire and an outer aluminum tube thereof. Background Art

[0002] Optical fiber composite overhead ground wire is a composite material that integrates the functions of optical fiber communication and overhead ground wire. It is mainly used in high-voltage transmission lines, such as overhead transmission systems with voltage levels of 110kV, 220kV, 500kV and 750kV, and has dual functions: one is to serve as a lightning protection line for transmission lines to provide protection against lightning strikes; the other is to transmit information through the optical fiber composited in the ground wire.

[0003] OPGW optical cable places optical fiber in the ground wire of overhead high-voltage transmission lines to form a fiber-optic communication network on the transmission lines. This structural form has both ground wire and communication functions. Since the ground wire is laid on the top frame of the ground wire of the high-voltage overhead transmission line with optical fiber on a stranded wire, it has the advantages of safety, reliability and no interference.

[0004] When producing this product, in order to increase the protective effect, it is usually coated with an aluminum tube on its surface. During the production process of the existing aluminum tube, the temperature of the aluminum material needs to be maintained to facilitate the extrusion of the aluminum tube. However, during the extrusion process of the aluminum tube, if the mold is not preheated and lubricated properly, uneven metal flow may occur, resulting in increased difficulty in extrusion, and an increased risk of aluminum raw materials sticking to the inner wall of the mold, thereby further increasing the difficulty of extrusion and causing an increase in the damage rate of the mold. Summary of the invention

[0005] The object of the present invention is to provide an aluminum-clad optical fiber composite overhead ground wire and an extrusion molding device for its outer aluminum tube to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: An aluminum-clad optical fiber composite overhead ground wire, comprising: An aluminum tube, and a telescopic protective structure arranged in the aluminum tube, wherein the telescopic protective structure encloses a plurality of optical fibers equidistantly distributed in a circumference, and a central reinforcing core is inserted between the optical fibers; Wherein, the telescopic protection structure comprises: A telescopic sleeve is placed in the aluminum tube and abuts against the inner wall of the aluminum tube, and a polyethylene outer protective tube is wrapped in the telescopic sleeve; A polyethylene inner protective tube is wrapped around the outer wall of the optical fiber, and a plurality of steel wire tubes are placed between the polyethylene inner protective tube and the polyethylene outer protective tube and are equidistantly distributed in a circle.

[0007] An extrusion molding device for an outer aluminum tube, used to produce the aluminum clad tube, comprises: The processing frames are symmetrically arranged, a receiving rod and a fixed mold are fixed between the processing frames, a heating tube connected to the fixed mold is fixed on the receiving rod, and a piston cylinder is also fixed on the processing frame; A raw material transfer mechanism is arranged on the processing frame, and a clamping assembly is arranged on the raw material transfer mechanism, and a plurality of clamping plates distributed equidistantly in a circle are connected to the clamping assembly, and an inclined plate is fixed on the clamping plate. The raw material transfer mechanism can transfer the raw material to a position matching the heating tube through the clamping assembly and the clamping plate; An extrusion assembly, arranged on the receiving rod, for pushing the raw material placed between the clamping plates into the heating tube; A pumping mechanism is arranged on the piston cylinder and connected to the raw material transfer mechanism. A nozzle is connected to the pumping mechanism. A follower translation assembly is arranged on the pumping mechanism. When the raw material transfer mechanism moves, the pumping mechanism can pump the solution in the piston cylinder into the nozzle. The pumping mechanism can drive the nozzle to reciprocate in the horizontal direction through the follower translation assembly.

[0008] As a further solution of the present invention: the raw material transfer mechanism includes a rotating rod rotatably mounted on the processing frame, a rotating plate is fixed on the rotating rod, a rotating guide rail is fixed on the rotating plate, a rotating ring is rotatably mounted in the rotating guide rail, and a gearing assembly connected to the rotating ring is provided on the piston cylinder.

[0009] As a further solution of the present invention: the meshing assembly includes a fixed sleeve fixedly installed on the end of the piston cylinder and sleeved on the rotating rod, a second gear is fixed on the fixed sleeve, and a first gear meshing with the second gear is fixed on the rotating ring.

[0010] As a further solution of the present invention: the clamping assembly includes a plurality of support sleeves fixedly mounted on the rotating ring and equidistantly distributed around the circumference, a support rod is slidably mounted in the support sleeve, the support rod is fixedly connected to the clamping plate, and a spring abutting against the clamping plate is sleeved on the support sleeve and the support rod; It also includes a sliding groove arranged on the outer wall of the supporting sleeve, and a protrusion which is slidably connected with the sliding groove is fixed on the supporting rod.

[0011] As a further solution of the present invention: the extrusion assembly includes a movable mold slidably mounted on the receiving rod, an extrusion rod cooperating with the heating tube is slidably mounted in the movable mold, and a conducting rod is slidably mounted in the extrusion rod.

[0012] As a further solution of the present invention: the pumping mechanism includes a discharge box rotatably mounted on the piston cylinder, a connecting rod fixedly connected to the rotating plate is fixed on the discharge box, a delivery pipe connected to the nozzle is fixed on the discharge box, and a guide assembly is arranged in the piston cylinder.

[0013] As a further solution of the present invention: the guide assembly includes a conveying hole opened on the piston cylinder and connected to the discharge box, symmetrically arranged guide columns are fixed in the piston cylinder, and a guiding structure connected to the guide columns is arranged in the piston cylinder.

[0014] As a further solution of the present invention: the guiding structure includes a first annular groove provided on the rotating rod, a piston disk slidably mounted on the guide column and slidably connected to the rotating rod, and a second limit block slidably connected to the first annular groove is fixed to the inner wall of the piston disk.

[0015] As a further solution of the present invention: the follower translation assembly includes a second annular groove opened on the outer wall of the fixed sleeve, a connecting plate slidably mounted on the fixed sleeve and slidably connected to the connecting rod, the connecting plate is fixedly connected to the conveying pipe, and a first limit block slidably connected to the second annular groove is fixed on the inner wall of the connecting plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present application can protect the optical fiber by multiple sleeves to ensure the normal use of the optical fiber. The telescopic sleeve can ensure that the overhead ground wire as a whole will not loosen when the external temperature changes. At the same time, under the action of the polyethylene protective tube, a double protection function is provided, and the steel wire tube and the central reinforcement core can increase the overall strength, thereby ensuring the normal use of the overhead ground wire.

[0017] 2. The present application can automatically apply lubricant to the surface of the raw material during the transfer of the raw material to prevent the problem of metal sticking in the mold due to improper lubrication during the extrusion process. During the transfer of the raw material, the raw material transfer mechanism works and clamps and fixes the raw material through the clamping assembly and the card plate. At the same time, the raw material transfer mechanism will also drive the pumping mechanism to move so that the lubricant in the piston cylinder is sprayed onto the surface of the raw material through the nozzle. Under the action of the follow-up translation assembly, the position of the nozzle can also be adjusted to ensure that the lubricant is evenly applied to the raw material. When the raw material is transported to the position cooperating with the heating tube, under the action of the extrusion assembly, the raw material is controlled to separate from the card plate and enter the heating tube to extrude the raw material. The coordination of material transportation and lubricant delivery can ensure that no adhesion occurs during the extrusion process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1The present invention is a schematic structural diagram of an embodiment of an aluminum-clad optical fiber composite overhead ground wire.

[0019] Figure 2 The figure is a schematic diagram of a half-section structure of an aluminum-clad optical fiber composite overhead ground wire in one embodiment.

[0020] Figure 3 The present invention is a structural schematic diagram of an embodiment of an extrusion molding device for an outer aluminum tube.

[0021] Figure 4 This is a structural schematic diagram from another angle in an embodiment of an extrusion molding device for an outer aluminum tube.

[0022] Figure 5 The present invention is a schematic diagram of the connection relationship among a raw material transfer mechanism, a clamping assembly, a part of a pumping mechanism, and a follow-up translation assembly in one embodiment of an extrusion molding device for an outer aluminum tube.

[0023] Figure 6 for Figure 5 Schematic diagram of the structure from another angle.

[0024] Figure 7 This is a schematic diagram of a partial half-section structure of an embodiment of an extrusion molding device for an outer aluminum tube.

[0025] Figure 8 This is a schematic diagram of the structure of an extrusion assembly, a fixed die, and a heating tube in one embodiment of an extrusion molding device for an outer aluminum tube.

[0026] Fig. 9 This is a schematic structural diagram of a clamping assembly and part of a raw material transfer mechanism in an embodiment of an extrusion molding device for an outer aluminum tube.

[0027] Fig.10 for Fig. 9 A schematic diagram of the enlarged structure at point A in the middle.

[0028] Fig.11 This is a schematic diagram of the exploded structure of a clamping component and part of a raw material transfer mechanism in an embodiment of an extrusion molding device for an outer aluminum tube.

[0029] Fig.12 The figure is a schematic diagram of the exploded structure of part of the pumping mechanism in one embodiment of the extrusion molding equipment for the outer aluminum tube.

[0030] Fig.13 The diagram is a schematic diagram of the exploded structure of part of the pumping mechanism and the follower translation assembly in one embodiment of the extrusion molding equipment for the outer aluminum tube.

[0031] In the figure: 1, aluminum tube; 2, telescopic sleeve; 3, polyethylene outer protective tube; 4, steel wire tube; 5, polyethylene inner protective tube; 6, optical fiber; 7, center reinforcing core; 8, processing frame; 9, support rod; 10, fixed mold; 11, heating tube; 12, movable mold; 13, extrusion rod; 14, conduction rod; 15, rotating rod; 1501, first annular groove; 16, rotating plate; 17, rotating guide rail; 18, rotating ring; 19, support sleeve; 1901, slide groove; 20. Support rod; 2001. Protrusion; 21. Clamping plate; 2101. Inclined plate; 22. Spring; 23. First gear; 24. Piston cylinder; 2401. Delivery hole; 25. Fixed sleeve; 2501. Second annular groove; 26. Second gear; 27. Discharge box; 28. Connecting rod; 29. ​​Delivery pipe; 30. Spray nozzle; 31. Connecting plate; 3101. First limit block; 32. Guide column; 33. Piston disc; 3301. Second limit block. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0034] See also Figure 1~Figure 2 In an embodiment of the present invention, an aluminum-clad optical fiber composite overhead ground wire comprises: An aluminum tube 1, and a telescopic protective structure arranged in the aluminum tube 1, wherein the telescopic protective structure encloses a plurality of optical fibers 6 distributed equidistantly in a circumference, and a central reinforcing core 7 is inserted between the optical fibers 6; Wherein, the telescopic protection structure comprises: A telescopic sleeve 2 is placed in the aluminum tube 1 and abuts against the inner wall of the aluminum tube 1, and a polyethylene outer protective tube 3 is wrapped in the telescopic sleeve 2; The polyethylene inner protective tube 5 is wrapped around the outer wall of the optical fiber 6 , and a plurality of steel wire tubes 4 are placed between the polyethylene inner protective tube 5 and the polyethylene outer protective tube 3 and are equidistantly distributed in a circle.

[0035] Specifically, the optical fiber composite overhead ground wire is an overhead ground wire containing optical fiber, which has multiple functions such as overhead ground wire and optical communication, and is mainly used for communication lines of overhead high-voltage power transmission systems. It can also be used to replace the existing ground wire of the old overhead high-voltage transmission system, increase optical communication lines, conduct short-circuit current and provide protection against lightning strikes. Special structures can be customized according to user needs. Due to its special installation location and environment, it is also greatly affected by the external environment. In order to ensure the normal use of the optical fiber, it is necessary to strengthen the protection of the optical fiber. According to the wrapping order from outside to inside, the aluminum tube 1 is located in the outermost layer, and the inner layers are the telescopic sleeve 2, the polyethylene outer protective tube 3, the steel wire tube 4, the polyethylene inner protective tube 5, the optical fiber 6, and the central reinforcing core 7. The telescopic sleeve 2 can shrink or expand to a certain extent to ensure that when the external temperature changes, the two sides of the telescopic sleeve 2 are always tightly fitted with the aluminum tube 1 and the polyethylene outer protective tube 3. At the same time, the steel wire tube 4 is filled between the polyethylene outer protective tube 3 and the polyethylene inner protective tube 5, which further enhances the strength of the overall protection. The central reinforcing core 7 located in the innermost part can cooperate with the steel wire tube 4 to synchronously provide support force to the inner and outer sides of the optical fiber 6, thereby further ensuring the normal use of the optical fiber 6.

[0036] See also Figure 3~Figure 13 , an extrusion molding device for an outer layer aluminum tube, used to produce the aluminum clad tube, comprising: A processing frame 8 is symmetrically arranged, a receiving rod 9 and a fixed mold 10 are fixed between the processing frames 8, a heating tube 11 connected to the fixed mold 10 is fixed on the receiving rod 9, and a piston cylinder 24 is also fixed on the processing frame 8; Among them, the center of the fixed mold 10 is connected, and the heating tube 11 is used to heat and keep the raw materials to be formed warm. One of the processing racks 8 is provided with a through hole connected to the fixed mold 10 to provide a channel for aluminum tube extrusion. The other processing rack 8 is also provided with a through hole for conveying aluminum tube processing raw materials.

[0037] See also Figure 3-Figure 6 , Fig. 9 , Fig.11 , a raw material transfer mechanism is arranged on the processing frame 8, and the raw material transfer mechanism includes a rotating rod 15 rotatably installed on the processing frame 8, a rotating plate 16 is fixed on the rotating rod 15, a rotating guide rail 17 is fixed on the rotating plate 16, a rotating ring 18 is rotatably installed in the rotating guide rail 17, and a gearing assembly connected to the rotating ring 18 is provided on the piston cylinder 24, wherein the gearing assembly includes a fixed sleeve 25 fixedly installed on the end of the piston cylinder 24 and sleeved on the rotating rod 15, a second gear 26 is fixed on the fixed sleeve 25, and a first gear 23 meshing with the second gear 26 is fixed on the rotating ring 18.

[0038] In detail, aluminum tube extrusion molding is achieved by extruding aluminum materials, and the process includes steps such as raw material preparation, smelting, extrusion molding, stretching treatment, annealing, surface treatment, cutting and molding, and packaging. During the extrusion process, the temperature of the aluminum material needs to be maintained to facilitate the extrusion of the aluminum tube. However, during the extrusion process of the aluminum tube, improper preheating and lubrication of the mold may cause uneven metal flow, thereby increasing the risk of adhesion. Therefore, it is necessary to preheat the heating tube 11 to the required temperature when the raw material enters the heating tube 11, and spray lubricant on the surface of the raw material before extrusion to ensure that the aluminum tube can be extruded smoothly.

[0039] Preferably, in the initial state, the rotating ring 18 is located at a position that cooperates with the through hole opened in the processing frame 8. At this time, the raw material can be transported between the rotating ring 18 through the through hole, and the raw material is positioned and clamped under the action of the clamping assembly and the card plate 21. When the clamping is completed, the rotating rod 15 rotates and drives the rotating plate 16 to move, thereby driving the rotating guide rail 17 to move. The rotating guide rail 17 will also drive the rotating ring 18 to move around the rotating rod 15 to transport the raw material to the position that cooperates with the heating tube 11 through the clamping assembly and the card plate 21. At the same time, when the rotating ring 18 moves, it will also drive the first gear 23 to move around the second gear 26. Since the first gear 23 and the second gear 26 are meshed with each other, and the second gear 26 will not rotate, the first gear 23 will also rotate when it moves around the rotating rod 15 to control the rotating ring 18 to move along the trajectory of the rotating guide rail 17. The rotating ring 18 will also control the rotation of the raw material itself through the clamping assembly and the card plate 21 to ensure that the pumping mechanism can evenly transport the lubricant in the piston cylinder 24 to the surface of the raw material.

[0040] See also Figure 3-Figure 6 , Figure 9-11 The raw material transfer mechanism is provided with a clamping assembly, and a plurality of card plates 21 equidistantly distributed around the circumference are connected to the clamping assembly, and an inclined plate 2101 is fixed on the card plate 21. The raw material transfer mechanism can transfer the raw materials to the position cooperating with the heating tube 11 through the clamping assembly and the card plate 21. The clamping assembly includes a plurality of support sleeves 19 fixedly mounted on the rotating ring 18 and equidistantly distributed around the circumference, a support rod 20 is slidably mounted in the support sleeve 19, the support rod 20 is fixedly connected to the card plate 21, and a spring 22 abutting against the card plate 21 is sleeved on the support sleeve 19 and the support rod 20; it also includes a slide groove 1901 opened on the outer wall of the support sleeve 19, and a protrusion 2001 slidably connected to the slide groove 1901 is fixed on the support rod 20.

[0041] It should be noted that, in the initial state, the spring 22 is in a compressed state, so that the support rod 20 is located at the end of the stroke away from the support sleeve 19, so that the protrusion 2001 is located at the end of the stroke on the side of the slide groove 1901, and the distance between the card plates 21 is the smallest. When the raw material needs to be transported, the raw material can be transported to between the card plates 21 through the through hole opened on the processing frame 8. When the raw material abuts against the inclined plate 2101, the inclined plate 2101 will give way, so that the card plates 21 move in the direction away from each other, so as to drive the support The rod 20 moves toward the support sleeve 19. At the same time, the support rod 20 will also drive the protrusion 2001 to move along the length direction of the slide groove 1901 to ensure that the card plate 21 will not deviate during movement. The support rod 20 will also compress the spring 22 during movement. When the raw material separates from the inclined plate 2101 and enters between the card plates 21, under the action of the spring 22, the card plates 21 will position and clamp the raw material, and continue to push the raw material until the raw material extends out of the farthest size of the rotating ring 18, thereby facilitating the subsequent coating of lubricant on the surface of the raw material.

[0042] Preferably, the purpose of setting the inclined plate 2101 is that when the sizes of the raw materials are different, the inclined plate 2101 can automatically give way when it abuts against the raw materials, so as to achieve the effect of the clamping plate 21 on the raw materials of different sizes, wherein the maximum size of the raw material will not be larger than the size of the heating tube 11, ensuring that the raw material can be smoothly pushed into the heating tube 11.

[0043] See also Figure 3 , Figure 4 , Figure 8 The extrusion assembly is arranged on the receiving rod 9 and is used to push the raw materials placed between the clamping plates 21 into the heating tube 11. The extrusion assembly includes a movable mold 12 slidably mounted on the receiving rod 9, and an extrusion rod 13 cooperating with the heating tube 11 is slidably mounted in the movable mold 12, and a conducting rod 14 is slidably mounted in the extrusion rod 13.

[0044] Furthermore, the movable die 12 can move along the length direction of the receiving rod 9 to a certain extent, and two cylinders are arranged on the processing frame 8, one of which is used to push the extrusion rod 13 to move, and the other cylinder is used to push the conducting rod 14 to move. When the aluminum tube is extruded, the raw material placed between the card plates 21 needs to be pushed into the heating tube 11 through the extrusion rod 13, and then the conducting rod 14 penetrates the raw material and is inserted into the fixed die 10. The size of the conducting rod 14 is the inner diameter size of the extruded aluminum tube. When the card plate 21 transports the raw material to the same axial position as the extrusion rod 13, at this time, under the action of the cylinder, the extrusion rod 13 is pushed toward The heating tube 11 moves in the direction of the raw material, so that the raw material enters the heating tube 11 and gradually separates from the card plate 21. When the raw material completely enters the heating tube 11, the heating tube 11 can keep the raw material in place. At this time, another cylinder pushes the conducting rod 14 to move until the raw material is penetrated and enters the fixed mold 10. At this time, the extrusion rod 13 continues to move and extrude the raw material. The extruded raw material will be extruded through the cylindrical channel formed by the conducting rod 14 and the fixed mold 10. When the raw material is extruded, the extrusion rod 13 and the conducting rod 14 are controlled to reset under the action of the cylinder, and the above steps are repeated to achieve continuous extrusion molding of the aluminum tube.

[0045] See also Figure 3-Figure 7 , Fig.12 , Fig.13 , a pumping mechanism is arranged on the piston cylinder 24 and connected to the raw material transfer mechanism, a nozzle 30 is connected to the pumping mechanism, the pumping mechanism includes a discharge box 27 rotatably mounted on the piston cylinder 24, a connecting rod 28 fixedly connected to the rotating plate 16 is fixed on the discharge box 27, a delivery pipe 29 connected to the nozzle 30 is fixed on the discharge box 27, a guide assembly is arranged in the piston cylinder 24, wherein the guide assembly includes a delivery hole 2401 opened on the piston cylinder 24 and connected to the discharge box 27, a symmetrically arranged guide column 32 is fixed in the piston cylinder 24, a guide structure connected to the guide column 32 is arranged in the piston cylinder 24, the above-mentioned guide structure includes a first annular groove 1501 opened on the rotating rod 15, a piston disc 33 slidably connected to the rotating rod 15 is slidably mounted on the guide column 32, and a second limit block 3301 slidably connected to the first annular groove 1501 is fixed on the inner wall of the piston disc 33.

[0046] Furthermore, a plurality of one-way valves are arranged on the piston cylinder 24, one of which is connected to a tank body filled with lubricant through a conduit, and another one-way valve is arranged at the position of the delivery hole 2401. The first annular groove 1501 and the second annular groove 2501 are formed by a combination of two symmetrical spiral grooves, and the number of spiral turns of the spiral groove is half a turn. In the initial state, the clamping plate 21 is located in a position cooperating with the through hole opened in the processing frame 8. Under the action of the first annular groove 1501 and the second limit block 3301, the piston disc 33 is located away from the discharge port. At the end of the stroke in the direction of the box 27, under the action of the piston disk 33, the piston cylinder 24 is filled with lubricant. At the same time, under the action of the follow-up translation assembly, the nozzle 30 is controlled by the delivery pipe 29 to be located at the end of the stroke in the direction of the rotating plate 16. When the raw material is inserted between the card plates 21, the rotating rod 15 rotates, and under the action of the gear, the raw material is controlled to rotate around the rotating rod 15 while rotating. At the same time, the rotating rod 15 also drives the first annular groove 1501 to move, and under the action of the second limit block 3301, the piston disk 3 3 movement, the piston plate 33 will move along the length direction of the guide column 32, the guide column 32 has a guiding function, ensuring that the piston plate 33 will not rotate with the rotating rod 15 when moving, and the piston plate 33 will also squeeze the lubricant in the piston cylinder 24, so that the lubricant enters the discharge box 27 through the delivery hole 2401, and is then delivered to the delivery pipe 29 through the discharge box 27, and the lubricant is sprayed onto the surface of the raw material through the nozzle 30. When the rotating rod 15 rotates, it will also drive the connecting rod 28 to move through the rotating plate 16, thereby driving The discharge box 27 rotates synchronously. At the same time, under the action of the follow-up translation assembly, the nozzle 30 synchronously follows the movement of the raw material to ensure that the lubricant sprayed by the nozzle 30 can always be delivered to the surface of the raw material. The follow-up translation assembly will also drive the nozzle 30 to move along the length direction of the rotating rod 15 through the delivery pipe 29 to ensure that the nozzle 30 can fully spray the lubricant on the surface of the raw material. When the rotating rod 15 rotates half a circle, the second limit block 3301 moves to the end of the stroke on one side of the first annular groove 1501, and the lubricant in the piston cylinder 24 is extruded.

[0047] Preferably, after the lubricant is sprayed and the raw material is extruded, it is necessary to control the clamping plate 21 to reset. At this time, the rotating rod 15 rotates again, and controls the first annular groove 1501 to move again, and under the action of the second limit block 3301, the piston disk 33 moves away from the discharge box 27 to suck the lubricant in the tank body into the piston cylinder 24, ensuring that the raw material can be coated with lubricant again when the raw material is transported again.

[0048] See also Figure 3-Figure 7 , Fig.13The pumping mechanism is provided with a follower translation assembly, and the pumping mechanism can pump the solution in the piston cylinder 24 into the nozzle 30 when the raw material transfer mechanism moves. The pumping mechanism can drive the nozzle 30 to reciprocate in the horizontal direction through the follower translation assembly. The follower translation assembly includes a second annular groove 2501 opened on the outer wall of the fixed sleeve 25, and a connecting plate 31 slidably connected to the connecting rod 28 is slidably installed on the fixed sleeve 25. The connecting plate 31 is fixedly connected to the delivery pipe 29, and a first limit block 3101 slidably connected to the second annular groove 2501 is fixed on the inner wall of the connecting plate 31.

[0049] Specifically, in order to ensure that the surface of the raw material is fully coated with lubricant, it is necessary to control the nozzle 30 to move along the length direction of the raw material when the nozzle 30 sprays the lubricant. In the initial state, the clamping plate 21 is located at a position that cooperates with the through hole opened in the processing frame 8, and the first limit block 3101 is located at the end of the stroke of the second annular groove 2501 toward the rotating plate 16, so that the distance between the connecting plate 31 and the rotating plate 16 is minimized. The connecting plate 31 also controls the nozzle 30 to be located at the end of the stroke toward the rotating ring 18 side through the delivery pipe 29. When the rotating rod 15 rotates, the first annular groove 1501 and the second limit block 3101 are located at the end of the stroke of the second annular groove 2501. Under the action of 301, the lubricant in the piston cylinder 24 is transported to the nozzle 30 through the piston disk 33. At the same time, the rotating rod 15 will control the movement of the connecting rod 28 through the rotating plate 16, thereby driving the connecting plate 31 to move. The connecting plate 31 will also drive the first limit block 3101 to move. Under the action of the second annular groove 2501, the connecting plate 31 moves in a direction away from the rotating plate 16. Under the action of the connecting plate 31, the nozzle 30 is controlled to move along the length direction of the raw material through the delivery pipe 29. Since the raw material itself is always rotating, the nozzle 30 can fully transport the lubricant to the surface of the raw material.

[0050] Preferably, when the first limit block 3101 moves to the end of the stroke on the other side of the second annular groove 2501, the lubricant coating on the surface of the raw material is completed. At this time, the raw material can be extruded. After the extrusion is completed, the rotating rod 15 rotates again, and under the action of the second annular groove 2501 and the first limit block 3101, the connecting plate 31 is reset to reset the nozzle 30.

[0051] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0052] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An aluminum-clad optical fiber composite overhead ground wire, characterized in that: include: An aluminum tube (1), and a telescopic protective structure arranged in the aluminum tube (1), wherein a plurality of optical fibers (6) distributed equidistantly in a circumference are enclosed in the telescopic protective structure, and a central reinforcing core (7) is inserted between the optical fibers (6); Wherein, the telescopic protection structure comprises: A telescopic sleeve (2) is placed inside the aluminum tube (1) and abuts against the inner wall of the aluminum tube (1), and a polyethylene outer protective tube (3) is wrapped inside the telescopic sleeve (2); A polyethylene inner protective tube (5) is wrapped around the outer wall of the optical fiber (6), and a plurality of steel wire tubes (4) are placed between the polyethylene inner protective tube (5) and the polyethylene outer protective tube (3) and are equidistantly distributed around the circumference.

2. An extrusion molding device for an outer layer aluminum tube, used to produce the aluminum clad tube as claimed in claim 1, characterized in that: include: A processing frame (8) is symmetrically arranged, a receiving rod (9) and a fixed mold (10) are fixed between the processing frames (8), a heating tube (11) connected to the fixed mold (10) is fixed on the receiving rod (9), and a piston cylinder (24) is also fixed on the processing frame (8); A raw material transfer mechanism is arranged on the processing frame (8), the raw material transfer mechanism is provided with a clamping assembly, the clamping assembly is connected to a plurality of clamping plates (21) distributed equidistantly in a circle, an inclined plate (2101) is fixed to the clamping plate (21), and the raw material transfer mechanism can transfer the raw material to a position cooperating with the heating tube (11) through the clamping assembly and the clamping plate (21); An extrusion assembly, arranged on the receiving rod (9), and used for pushing the raw material placed between the clamping plates (21) into the heating tube (11); A pumping mechanism is arranged on the piston cylinder (24) and connected to the raw material transfer mechanism. A nozzle (30) is connected to the pumping mechanism. A follower translation assembly is arranged on the pumping mechanism. When the raw material transfer mechanism moves, the pumping mechanism can pump the solution in the piston cylinder (24) into the nozzle (30). The pumping mechanism can drive the nozzle (30) to reciprocate in the horizontal direction through the follower translation assembly.

3. The outer aluminum tube extrusion molding equipment according to claim 2 is characterized in that: The material transfer mechanism comprises a rotating rod (15) rotatably mounted on the processing frame (8), a rotating plate (16) being fixed on the rotating rod (15), a rotating guide rail (17) being fixed on the rotating plate (16), a rotating ring (18) being rotatably mounted in the rotating guide rail (17), and a gear assembly connected to the rotating ring (18) being provided on the piston cylinder (24).

4. The outer aluminum tube extrusion molding equipment according to claim 3 is characterized in that: The gearing assembly comprises a fixed sleeve (25) fixedly mounted on the end of the piston cylinder (24) and sleeved on the rotating rod (15), a second gear (26) being fixed on the fixed sleeve (25), and a first gear (23) meshing with the second gear (26) being fixed on the rotating ring (18).

5. The outer aluminum tube extrusion molding equipment according to claim 4, characterized in that: The clamping assembly comprises a plurality of support sleeves (19) fixedly mounted on the rotating ring (18) and equidistantly distributed around the circumference, a support rod (20) being slidably mounted in the support sleeve (19), the support rod (20) being fixedly connected to the clamping plate (21), and a spring (22) being sleeved on the support sleeve (19) and the support rod (20) and abutting against the clamping plate (21); It also includes a sliding groove (1901) provided on the outer wall of the support sleeve (19), and a protrusion (2001) slidably connected to the sliding groove (1901) is fixed on the support rod (20).

6. The outer aluminum tube extrusion molding equipment according to claim 4, characterized in that: The extrusion assembly comprises a movable die (12) slidably mounted on the receiving rod (9), an extrusion rod (13) cooperating with the heating tube (11) being slidably mounted in the movable die (12), and a conducting rod (14) being slidably mounted in the extrusion rod (13).

7. The extrusion molding equipment for outer aluminum tube according to claim 6, characterized in that: The pumping mechanism comprises a discharge box (27) rotatably mounted on the piston cylinder (24), a connecting rod (28) fixedly connected to the rotating plate (16) being fixed to the discharge box (27), a delivery pipe (29) connected to the nozzle (30) being fixed to the discharge box (27), and a guide assembly being arranged in the piston cylinder (24).

8. The outer aluminum tube extrusion molding equipment according to claim 7, characterized in that: The guide assembly comprises a conveying hole (2401) formed on the piston cylinder (24) and connected to the discharge box (27); symmetrically arranged guide columns (32) are fixed in the piston cylinder (24); and a guide structure connected to the guide columns (32) is arranged in the piston cylinder (24).

9. The outer aluminum tube extrusion molding equipment according to claim 8, characterized in that: The guide structure comprises a first annular groove (1501) formed on the rotating rod (15); a piston disc (33) slidably connected to the rotating rod (15) is slidably mounted on the guide column (32); and a second limit block (3301) slidably connected to the first annular groove (1501) is fixed to the inner wall of the piston disc (33).

10. The outer aluminum tube extrusion molding equipment according to claim 7, characterized in that: The follow-up translation assembly comprises a second annular groove (2501) formed on the outer wall of the fixed sleeve (25); a connecting plate (31) slidably connected to the connecting rod (28) is slidably mounted on the fixed sleeve (25); the connecting plate (31) is fixedly connected to the conveying pipe (29); and a first limit block (3101) slidably connected to the second annular groove (2501) is fixedly mounted on the inner wall of the connecting plate (31).

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