Cable extrusion device
Through the internal and external coordinated cooling technology of the cable extrusion device, the problem of low cooling efficiency of thick-sheathed cables is solved, and an efficient and stable cooling effect is achieved, which avoids thermal stress unevenness and quality defects, and reduces energy consumption and land occupation demand.
Patent Information
- Application Number
- CN202510500375.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2025-07-11
AI Technical Summary
In the prior art, the cooling efficiency of thick sheathed cables is low, and external cooling methods are difficult to penetrate quickly into the cable, resulting in uneven thermal stress, quality defects, and serious energy consumption and space waste.
The cable extrusion device is adopted, combined with the temperature regulating mechanism, cooling device and vibration mechanism, and the wire core is pre-cooled and bidirectional cooling are realized, and the cooling efficiency is improved through internal and external coordinated cooling to avoid the problem of thermal stress unevenness.
It significantly improves the cooling efficiency and quality stability of thick-sheathed cables, reduces energy consumption and equipment footprint, and improves the appearance quality and performance stability of wires.
Smart Images
Figure CN120287547A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of cable production equipment, and more particularly, to a cable extrusion device. Background Art
[0002] Currently, the cooling process in the cable manufacturing field mainly adopts an external cooling method, that is, the outer surface of the cable is cooled by traditional methods such as soaking or spraying in a water tank. This single external cooling mode has obvious technical limitations:
[0003] Cooling efficiency bottleneck: For thick-sheathed cables (such as high-voltage cross-linked polyethylene insulated cables, submarine cables, etc.), due to the relatively thick insulation layer and protective layer, heat needs to conduct slowly from the inside to the outside. When relying solely on external cooling, the cooling medium is difficult to quickly penetrate into the cable interior, resulting in low overall cooling efficiency and severely restricting the improvement of the production line speed.
[0004] Problem of uneven thermal stress: External rapid cooling will cause the outer layer of the sheath to shrink sharply, while the inner layer remains in a high-temperature expansion state. This asynchronous cooling process is likely to generate residual thermal stress inside the material, leading to quality defects such as sheath delamination, deformation, and even microcracks.
[0005] Energy consumption and space waste: To achieve an ideal cooling effect, the traditional process has to extend the length of the cooling water tank (usually 20 - 30 meters) or increase the cooling intensity, which not only significantly increases the floor area of the equipment but also causes excessive consumption of water resources and energy.
[0006] Although the industry has tried to optimize by improving the water tank structure (such as adding a turbulence device) or adopting spray cooling, etc., these improvements have still not broken through the inherent "from outside to inside" one-way cooling mode and cannot fundamentally solve the cooling efficiency problem of thick-sheathed cables. Therefore, there is an urgent need to develop an innovative cooling technology that can achieve coordinated internal and external cooling of the cable and significantly improve the cooling efficiency and quality stability of thick-sheathed cables. Summary of the Invention
[0007] The purpose of the present invention is to provide a cable extrusion device that can enable the rapid cooling of the inner layer of the glue after the wire is coated with glue.
[0008] The embodiments of the present invention are realized through the following technical solutions:
[0009] A cable extrusion device includes a temperature adjustment mechanism and an extrusion mechanism; the temperature adjustment mechanism is arranged at the front end of the extrusion mechanism so that the wire enters the extrusion mechanism through the temperature adjustment mechanism; the temperature adjustment mechanism includes a box body and a temperature adjustment device connected to the inside of the box body to enable the temperature adjustment device to control the temperature inside the box body.
[0010] Further, two wire wheels are arranged inside the box body; the two wire wheels are arranged at intervals so that the wire material reciprocally winds between the two wire wheels.
[0011] Further, one group of the wire wheels is fixedly arranged at the top of the box body; the other group of wire wheels are all connected to a rotating shaft; one end of the rotating shaft is arranged on the inner wall of the box body in a liftable manner.
[0012] Further, the box body includes a fixed box and a cover plate; the fixed box is in the shape of a box with an opening on one side; the cover plate is fitted to the opening of the fixed box so that the cover plate can close the opening of the fixed box; the two wire wheels are both arranged on the cover plate.
[0013] Further, a plurality of guide rails are arranged on the cover plate; a chute is arranged inside the fixed box to cooperate with the guide rails so that the guide rails can be received in the chute and can slide relative to the chute.
[0014] Further, rollers are also arranged at the bottom of the cover plate.
[0015] Further, a cooling device is also included; the cooling device includes a water tank and a water temperature controller for controlling the water temperature in the water tank; the water tank is arranged at the rear end of the extruder so that the cable extruded by the extruder enters the water tank.
[0016] Further, the cooling device also includes an air cooling mechanism; the air cooling mechanism is arranged at the rear end of the water tank; the air outlet of the air cooling mechanism faces the wire material.
[0017] Further, a vibration mechanism is also included; the vibration mechanism is arranged to cooperate with the air outlet so that the air outlet faces the vibration part of the wire material; the vibration mechanism includes a main wheel and a sub-wheel; the rotating shaft of the main wheel is connected to a bracket; the sub-wheel is rotatably connected to the bracket, and the main wheel and the sub-wheel are in the same plane; a driving device is arranged on the rotating shaft of the main wheel.
[0018] Further, a plurality of groups of the vibration mechanism are arranged; the plurality of vibration mechanisms are distributed along the extending direction of the wire material.
[0019] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects:
[0020] When the cable extruding device of the present invention is used, the wire core part twisted into one strand by a stranding machine enters a temperature regulating mechanism for cooling, so that the temperature of the core part is greatly reduced. Subsequently, the core part enters the extruder. The extruder evenly coats the molten glue on the outer wall of the core part. Since the temperature of the core part is relatively low, the glue can be quickly cooled and hardened after adhering to the outer wall of the core part. Subsequently, the glue attached to the outside of the core part follows the core part through the extruder and enters the water tank for cooling.
[0021] Pre-cooling the core enables the internal rapid cooling of the adhesive liquid, which then closely adheres to the outer wall of the core, ensuring that the cable protective layer tightly wraps around the internal core. This avoids the problem in the prior art where the outer layer hardens first due to external cooling, and then the inner layer cools and shrinks, resulting in the protective layer not tightly wrapping around the internal core. After the wire enters the water tank, the cold of the core continues to be released, cooling the adhesive liquid from the inside out. At the same time, the water in the water tank cools the adhesive liquid from the outside in. This enables the cooling of the adhesive liquid to occur simultaneously from two directions, greatly improving the cooling efficiency. This also causes the innermost and outermost layers to rapidly cool and harden, and only the adhesive liquid in the middle needs to cool slowly. This limits the direction of shrinkage during cooling to only the adhesive liquid in the middle, greatly reducing the amount of restricted shrinkage during cooling and avoiding obvious shrinkage marks. The appearance quality of the wire is better.
[0022] Two sets of wire guide wheels are arranged inside the box body, making the length of the wire wound between the two sets of guide wheels longer. This increases the residence time of the core inside the box body, thus better cooling the core. The lower set of wire guide wheels can be lifted and lowered, making the length of the core wound between the two sets of wire guide wheels adjustable, and thus the cooling time of the core can be adjusted. At the same time, the two sets of wire guide wheels can also play a buffering effect, avoiding sudden changes in production quality caused by fluctuations in the production speed of the entire system. The box body is provided with a cover plate and guide rails, enabling the cover plate to drive the two sets of wire guide wheels out of the fixed box, which is convenient for winding the core around the two sets of wire guide wheels. Then, the two sets of wire guide wheels and the wound core can be sent into the fixed box, which is convenient for operation.
[0023] A vibration mechanism is arranged behind the water tank, such that when the main wheel rotates, it drives the auxiliary wheel to rotate around it. When the auxiliary wheel rotates to the wire, it can push the wire to the side, causing the wire to vibrate, and thus the water droplets attached to the surface fall off under the vibration. Together with the air-cooling mechanism arranged behind the water tank, the water droplets attached to the surface of the wire can be further removed by wind. At the same time, it can also cool the wire. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.
[0025] Figure 1 It is a schematic diagram of a cable extrusion device;
[0026] Figure 2 It is Figure 1 An enlarged view of part a in
[0027] Figure 3 Schematic diagram of the external shape of the temperature control mechanism;
[0028] Figure 4 Schematic diagram of the cover plate being opened;
[0029] Figure 5 Schematic diagram of the wire guide wheel cooperating with the cover plate.
[0030] Icons: 1 - Extrusion mechanism, 2 - Wire guide wheel, 3 - Core part, 4 - Fixed box, 5 - Cover plate, 6 - Guide rail, 7 - Roller, 8 - Water tank, 9 - Air cooling mechanism, 10 - Main wheel, 11 - Auxiliary wheel, 12 - Bracket, 13 - Cable. Specific implementation manners
[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.
[0032] Embodiment:
[0033] As Figures 1 - 5 shown, this embodiment provides a cable extrusion device, including a temperature control mechanism and an extrusion mechanism 1. The extrusion mechanism 1 is a common extruder, which can evenly wrap the molten plastic around the core part 3 of the cable 13 passing through it. The temperature control mechanism is arranged at the front end of the extrusion mechanism 1 so that the wire passes through the temperature control mechanism and enters the extrusion mechanism 1. The temperature control mechanism includes a box body and a temperature control device connected inside the box body, so that the temperature control device controls the temperature inside the box body. The box body is used to form a relatively enclosed space, so that the internal environment remains at a low temperature, avoiding a large impact on the internal environment of the box body from the external environment. Specifically, the temperature control device can be an air conditioning mechanism, or a combination of a liquid nitrogen injection device and an electric heating mechanism. As long as the temperature inside the box body can be controlled. Specifically, the temperature inside the box body can be set according to requirements. If it is necessary to pre-cool the core part 3, the temperature inside the box body can be adjusted to a lower state. For example, the temperature inside the box body can be adjusted to about 0 degrees, so that the glue can be quickly cooled and hardened after being wrapped around the outside of the core part 3. It is also possible to pre-heat the core part 3 so that the temperature of the core part 3 is close to the temperature of the glue, thereby avoiding cracking and the like under a large temperature difference when the glue is wrapped around the outside of the core part 3.
[0034] It also includes a cooling device. The cooling device includes a water tank 8 and a water temperature controller for controlling the water temperature in the water tank 8. The water tank 8 is arranged at the rear end of the extruder so that the cable 13 extruded by the extruder enters the water tank 8.
[0035] This embodiment mainly describes the pre-cooling of the core 3. When the cable extrusion device of this embodiment is in use, the wire core 3 stranded into one strand by a stranding machine enters the temperature adjustment mechanism for cooling, so that the temperature of the core 3 is greatly reduced. Subsequently, the core 3 enters the extruder. The extruder evenly coats the molten glue on the outer wall of the core 3. Since the temperature of the core 3 is relatively low, the glue can quickly cool and harden after adhering to the outer wall of the core 3. Subsequently, the glue attached to the outside of the core 3 follows the core 3 through the extruder and enters the water tank 8 for cooling.
[0036] Pre-cooling the core 3 enables the inside of the glue to cool quickly, and then tightly adhere to the outer wall of the core 3, making the cable 13 protective layer tightly wrap the inner core 3. This avoids the problem in the prior art that the outer layer hardens first and then the inner layer cools and shrinks, resulting in the protective layer not tightly wrapping the inner core 3. After the wire enters the water tank 8, the cold of the core 3 continues to be released, and then cools the glue from the inside out. At the same time, the water in the water tank 8 cools the glue from the outside in. This enables the cooling of the glue to be carried out simultaneously from two directions, greatly improving the cooling efficiency. This also enables the innermost and outermost layers to cool and harden quickly, and only the glue in the middle needs to be cooled slowly. The glue whose contraction direction is restricted during cooling is only the glue in the middle, greatly reducing the restricted contraction amount during cooling and avoiding obvious shrinkage marks, and the appearance quality of the wire is better. At the same time, less post-cooling of the glue also reduces the internal stress of the protective layer, and the performance is more stable. It should be noted that after part of the glue cools and hardens, it will restrict the contraction direction of the remaining unhardened glue, so that the glue can only shrink in the direction of the already hardened glue. The glue that hardens later is the glue whose contraction direction is restricted during cooling.
[0037] In practice, the preheating and pre-cooling of the core 3 are selected according to needs. The preheating or pre-cooling temperature is set according to parameters such as the material of the glue. As long as the processing quality can be guaranteed.
[0038] In this embodiment, two sets of wire guide wheels 2 are arranged inside the box body. As Figure 4 and Figure 5 shown, the two sets of wire guide wheels 2 are arranged at intervals so that the wire reciprocally winds between the two sets of wire guide wheels 2. Several wire guide wheels 2 in each group are connected to the same rotating shaft and can rotate independently relative to the rotating shaft. After the core 3 enters the inside of the box body, it enters the first wire guide wheel 2 on the upper inner side, then bypasses this wire guide wheel 2 and enters the first wire guide wheel 2 on the lower inner side. After that, it enters the second wire guide wheel 2 on the upper inner side through the first wire guide wheel 2 on the lower inner side, and then enters the second wire guide wheel 2 on the lower inner side. And so on, the core 3 reciprocally winds between the two sets of wire guide wheels 2.
[0039] Two sets of wire guide wheels 2 are arranged inside the box body, so that the length of the wire wound between the two sets of guide wheels is longer. As a result, the residence time of the core 3 inside the box body is increased, and thus the core 3 can be cooled better.
[0040] In this embodiment, one set of wire guide wheels 2 is fixedly arranged at the top of the box body. The other set of wire guide wheels 2 are all connected to a rotating shaft, and one end of the rotating shaft is arranged on the inner wall of the box body in a liftable manner. The lower set of wire guide wheels 2 can be lifted and lowered so that the length of the core 3 wound between the two sets of wire guide wheels 2 is adjustable, and thus the cooling time of the core 3 can be adjusted. At the same time, the two sets of wire guide wheels 2 can also play a buffering effect. To avoid sudden changes in production quality caused by fluctuations in the production speed of the entire system. For example, when the stranding machine replaces the wire wheel and stops for a short time and cannot continue to output the wire core 3 stranded into one strand, the two sets of wire guide wheels 2 gradually approach, and thus the core 3 stored between the two sets of wire guide wheels 2 is released, so that the rear extruder can continue to produce. In order to facilitate the control of the lifting of the lower wire guide wheel 2, a driving mechanism can be added. Commonly, a combination of a motor and a lead screw can be used to drive the rotation shaft of the lower wire guide wheel 2 to lift and lower. This structure belongs to a common mechanical structure and will not be elaborated in this embodiment.
[0041] In this embodiment, the box body includes a fixed box 4 and a cover plate 5. As Figure 3 and Figure 4 shown, the fixed box 4 is in the shape of a box with one side open. The cover plate 5 is arranged in cooperation with the opening of the fixed box 4 so that the cover plate 5 can close the opening of the fixed box 4. The two sets of wire guide wheels 2 are both arranged on the cover plate 5. So that the cover plate 5 can open one side of the fixed box 4 and can also close it. The cover plate 5 is provided with a plurality of guide rails 6. Inside the fixed box 4, a chute is arranged in cooperation with the guide rails 6 so that the guide rails 6 can be accommodated in the chute and can slide relative to the chute.
[0042] The box body is provided with the cover plate 5 and the guide rails 6 so that the cover plate 5 can drive the two sets of wire guide wheels 2 out of the fixed box 4, and thus it is convenient to wind the core 3 around the two sets of wire guide wheels 2. Then, the two sets of wire guide wheels 2 and the wound core 3 can be sent into the fixed box 4, which is convenient for operation.
[0043] In this embodiment, rollers 7 are further arranged at the bottom of the cover plate 5. As Figure 4 shown, the rollers 7 support the cover plate 5 when it is moved out through the rollers 7, and thus better ensure stability.
[0044] In this embodiment, the cooling device further includes an air-cooling mechanism 9. The air-cooling mechanism 9 is arranged at the rear end of the water tank 8. The air outlet of the air-cooling mechanism 9 faces the wire. So that the cable 13 is cooled further after flowing out of the water tank 8 through the air-cooling mechanism, and at the same time, the water droplets attached to the surface of the cable 13 are also blown away.
[0045] In this embodiment, a vibration mechanism is further included. The vibration mechanism is arranged in cooperation with the air outlet so that the air outlet is directly opposite to the vibrating part of the wire. As Figure 2 shown, the vibration mechanism includes a main wheel 10 and a sub-wheel 11. A bracket 12 is connected to the rotating shaft of the main wheel 10. The sub-wheel 11 is rotatably connected to the bracket 12, and the main wheel 10 and the sub-wheel 11 are located in the same plane. A driving device is arranged on the rotating shaft of the main wheel 10. The driving device can be a motor, which can be directly connected to the rotating shaft of the main wheel 10 or connected to the rotating shaft of the main wheel 10 through a transmission belt.
[0046] The vibration mechanism is arranged behind the water tank 8, so that when the main wheel 10 rotates, it drives the sub-wheel 11 to rotate around it. When the sub-wheel 11 rotates to the wire, it can push the wire to the side, thereby causing the wire to vibrate, and further causing the water droplets attached to the surface to fall off under the vibration. Cooperating with the air-cooling mechanism 9 arranged behind the water tank 8 can further remove the water droplets attached to the surface of the wire by wind. At the same time, it can also cool the wire.
[0047] In this embodiment, several groups of vibration mechanisms are provided. The several vibration mechanisms are distributed along the extension direction of the wire. The continuous vibration of the cable 13 can be achieved through multiple groups of vibration mechanisms, thereby better cleaning the water droplets attached to the surface.
[0048] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A cable extrusion device, characterized in that, It includes a temperature regulating mechanism and an extrusion mechanism; the temperature regulating mechanism is arranged at the front end of the extrusion mechanism so that the wire passes through the temperature regulating mechanism and enters the extrusion mechanism; the temperature regulating mechanism includes a box body and a temperature regulating device connected inside the box body to enable the temperature regulating device to control the temperature inside the box body.
2. The cable extrusion device according to claim 1, characterized in that, There are two groups of wire guide wheels arranged inside the box body; the two groups of wire guide wheels are arranged at intervals so that the wire reciprocally winds between the two groups of wire guide wheels.
3. The cable extrusion device according to claim 2, characterized in that, One group of wire guide wheels is fixedly arranged at the top of the box body; the other group of wire guide wheels are all connected to a rotating shaft and one end of the rotating shaft is arranged on the inner wall of the box body in a liftable manner.
4. The cable extrusion device according to claim 3, characterized in that, The box body includes a fixed box and a cover plate; the fixed box is in the shape of a box with one side open; the cover plate is arranged to cooperate with the opening of the fixed box so that the cover plate can close the opening of the fixed box; the two groups of wire guide wheels are both arranged on the cover plate.
5. The cable extrusion device according to claim 4, wherein, The cover plate is provided with a plurality of guide rails; a sliding groove is arranged inside the fixed box to cooperate with the guide rails so that the guide rails can be received in the sliding groove and can slide relative to the sliding groove.
6. The cable extrusion device according to claim 5, characterized in that, The bottom of the cover plate is further provided with rollers.
7. The cable extrusion device according to claim 6, characterized in that, It further includes a cooling device; the cooling device includes a water tank and a water temperature controller for controlling the water temperature in the water tank; the water tank is arranged at the rear end of the extruder so that the cable extruded by the extruder enters the water tank.
8. The cable extrusion device according to claim 7, characterized in that, The cooling device further includes an air cooling mechanism; the air cooling mechanism is arranged at the rear end of the water tank; the air outlet of the air cooling mechanism faces the wire.
9. The cable extrusion device according to claim 8, characterized in that It further includes a vibration mechanism; the vibration mechanism is arranged to cooperate with the air outlet so that the air outlet faces the vibration part of the wire; the vibration mechanism includes a main wheel and a sub-wheel; the rotating shaft of the main wheel is connected to a bracket; the sub-wheel is rotatably connected to the bracket, and the main wheel and the sub-wheel are in the same plane; a driving device is arranged on the rotating shaft of the main wheel.
10. The cable extrusion device according to claim 9, characterized in that, There are several groups of the vibration mechanisms; several vibration mechanisms are distributed along the extending direction of the wire.