A cable insulation extrusion apparatus

Abstract

The application discloses a cable insulation extrusion equipment and relates to the field of cable extruders, which comprises an extruder and an extrusion die, and one side of the extruder is provided with a cooling system, the cooling system comprises multiple groups of water tanks, multiple groups of coils and multiple groups of cooling components, one side of the first water tank is provided with a water inlet pipe, one side of the fifth water tank is provided with a water outlet pipe, a circulating system is connected between the water outlet pipe and the water inlet pipe, the water inlet pipe, the water outlet pipe and the multiple groups of coils are connected through the setting of water supply hoses, and the end portions of the water inlet pipe, the water outlet pipe and the multiple groups of coils are connected with the cooling components through the setting of shunt joints and water distribution hoses. The multiple groups of water tanks, the multiple groups of heat exchange coils and the multiple groups of cooling components are arranged, so that the temperature of circulating water is gradually increased in a gradient, the insulation layer of the cable is cooled by the circulating water with more uniform temperature difference distribution, and the emergence of internal stress of the cable insulation layer can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cable extruders, in particular to a cable insulation extrusion device. BACKGROUND

[0002] The cable extruder is the core equipment in the cable manufacturing process, mainly used for continuously and uniformly coating the conductor (copper wire, aluminum wire, etc.) or the outer layer of the cable core with high molecular polymers (such as polyethylene, polyvinyl chloride, cross-linked polyethylene, etc.) such as insulation materials and sheath materials through the "extrusion" process, forming the insulation layer, inner sheath or outer sheath of the cable, and finally giving the cable key properties such as electrical insulation, mechanical protection, and environmental corrosion resistance.

[0003] The insulation layer is in a high-temperature molten state when it is extruded from the extruder die, and if it is not cooled in time, it will directly affect the cable quality and production efficiency. Insulation layer cooling is mainly used to fix the geometric shape, ensure the dimensional accuracy, stabilize the material physical properties, ensure the insulation effect, avoid surface defects, and improve the appearance quality. After the cable is extruded from the die, it is directly introduced into a "cooling water tank" filled with circulating water. The water quickly absorbs heat by wrapping the insulation layer. The water tank is usually divided into a "front high-temperature zone" and a "rear low-temperature zone" to gradually reduce the temperature to avoid cracking of the insulation layer due to excessive temperature difference.

[0004] The insulation layer cooling temperature needs to be achieved through "segmented temperature control + precise monitoring". The core is to gradually reduce the temperature from the molten state to room temperature, and to avoid excessive temperature difference in order to prevent the insulation layer from cracking, deforming or internal stress remaining. When the cable insulation layer enters the cooling water tank, the low-temperature circulating water enters from the "cable outlet end" of the cooling tank and is discharged from the "cable inlet end". That is, the flow direction of the circulating water is opposite to the advancing direction of the cable. In this way, the water tank can be divided into a "front high-temperature zone" and a "rear low-temperature zone". However, when the circulating water flows in the water tank, the low-temperature circulating water and the high-temperature circulating water cannot completely blend in different areas of the cable. This makes the temperature distribution in different areas of the cable during the advancing process not uniform. When the temperature difference of the cable insulation layer is too large in a short time, internal stress of the material is likely to occur, thereby affecting the quality of the cable. SUMMARY

[0005] Therefore, the purpose of the present application is to provide a cable insulation extrusion device to solve the technical problems mentioned in the background.

[0006] To achieve the above object, the present application provides the following technical scheme: a cable insulation extrusion equipment, comprising an extruder and an extrusion die, one side of the extruder is provided with a cooling system, the cooling system comprises a plurality of water tanks, a plurality of coils and a plurality of cooling assemblies, the plurality of water tanks are respectively a first water tank, a second water tank, a third water tank, a fourth water tank and a fifth water tank, the plurality of coils are respectively a first coil arranged in the first water tank, a second coil arranged in the second water tank, a third coil arranged in the third water tank and a fourth coil arranged in the fourth water tank, and the plurality of cooling assemblies are respectively a first cooling assembly, a second cooling assembly, a third cooling assembly, a fourth cooling assembly and a fifth cooling assembly, the plurality of cooling assemblies are arranged above the plurality of water tanks, one side of the first water tank is provided with a water inlet pipe, one side of the fifth water tank is provided with a water outlet pipe, a circulating system is connected between the water outlet pipe and the water inlet pipe, the water inlet pipe, the water outlet pipe and the plurality of coils are connected by arranging water passing hoses, and the ends of the water inlet pipe, the water outlet pipe and the plurality of coils are connected with the cooling assemblies by arranging shunt joints and water distribution hoses.

[0007] By adopting the above technical scheme, the temperature of the circulating water is gradually increased in gradient by arranging the plurality of water tanks, the plurality of heat exchange coils and the plurality of cooling assemblies, so that the cable insulation layer is cooled by the circulating water with more uniform temperature difference distribution, and the occurrence of stress in the cable insulation layer can be reduced.

[0008] The present application further provides that the bottoms of the first water tank, the second water tank, the third water tank, the fourth water tank and the fifth water tank are provided with drain ports, and the plurality of drain ports are connected by arranging pipes and a circulating system.

[0009] As a preferred, by arranging the drain ports at the bottoms of the first water tank, the second water tank, the third water tank, the fourth water tank and the fifth water tank, and then connecting the circulating system by the pipes, the circulating water in the water tanks can be collected and discharged into the circulating system for recooling and reuse.

[0010] The present application further provides that the first cooling assembly comprises two groups of symmetrically distributed semicircular sleeve pipes, the sides of the two groups of semicircular sleeve pipes are provided with a plurality of water inlet joints, the plurality of water inlet joints are used for connecting water distribution hoses, and the water passing hoses and the water distribution hoses are flexible materials with lengths matched with the moving distances of the cooling assemblies.

[0011] As a preferred, by arranging the water inlet joints, the water distribution hoses and the shunt joints, the circulating water can uniformly enter the inside of the cooling assemblies, so as to improve the heat exchange effect of the circulating water and the cable insulation layer.

[0012] The present application further provides that the insides of the two groups of semicircular sleeve pipes are respectively provided with arc-shaped sponges, and the insides of the arc-shaped sponges are provided with embedded grooves matched with the cables.

[0013] As preferred, by setting the arc-shaped sponge, more circulating water can be locked, and the loss of circulating water can be reduced, and the circulating water and the cable can be better contacted through the arc-shaped sponge.

[0014] The application further provides that the side surfaces of the two groups of semi-circular sleeve pipes are provided with sealing strips for sealing the two groups of semi-circular sleeve pipes, and the end portions of the two groups of semi-circular sleeve pipes are provided with holes matched with the cable.

[0015] As preferred, by setting the sealing strips, the two groups of semi-circular sleeve pipes can be separated from each other, and the sealing performance of the two groups of semi-circular sleeve pipes when closed can be improved.

[0016] The application further provides that the top of the water tank is provided with a bearing mechanism for bearing a plurality of cooling assemblies.

[0017] As preferred, by setting the bearing mechanism, the cooling assemblies can be installed, and the bearing mechanism can drive the plurality of cooling assemblies to separate and close.

[0018] The application further provides that the bearing mechanism comprises a bearing frame, the inside of the bearing frame is rotatably connected with a driving rod, the outside of the driving rod is symmetrically provided with screw grooves, the inside of the bearing frame is movably provided with two groups of movable frames, the two groups of movable frames are symmetrically arranged, and the two groups of movable frames are screw-connected with the driving rod.

[0019] As preferred, by setting the symmetrically distributed screw grooves, the two groups of movable frames can be driven to approach or move away from each other.

[0020] The application further provides that the bottom of the movable frame is movably provided with a plurality of connecting rods, the outside of the plurality of connecting rods is sleeved with springs, and the plurality of connecting rods are respectively fixedly connected with the plurality of cooling assemblies.

[0021] As preferred, by setting the plurality of connecting rods and the springs to install the cooling assemblies, the movable frame can drive the connecting rods to move, and the two groups of semi-circular sleeve pipes of the cooling assemblies can be closed.

[0022] The application further provides that the plurality of coil pipes are respectively immersed in corresponding water tanks, and the plurality of coil pipes are copper pipes.

[0023] As preferred, by setting the coil pipes made of copper, the heat exchange efficiency of the circulating water in the coil pipes and the circulating water in the water tank can be improved.

[0024] In summary, the application mainly has the following beneficial effects:

[0025] The application sets multiple groups of water tanks, multiple groups of heat exchange coils and multiple groups of cooling assemblies, so that the temperature of circulating water gradually increases in gradient, thereby using circulating water with more uniform temperature difference distribution to cool the insulating layer of the cable, which can reduce the occurrence of internal stress of the cable insulating layer, part of the low-temperature circulating water enters the first cooling assembly through the water inlet pipe to cool the deepest layer of the cable insulating layer, and the other part of the low-temperature circulating water enters the first coil, the first coil is immersed in the first water tank, and the water in the first water tank comes from the first cooling assembly, that is, the circulating water entering the first cooling assembly from the water inlet pipe is dropped in the first water tank after heat exchange with the cable insulating layer, so the temperature of the circulating water in the first water tank is higher than that in the first coil, the circulating water in the first water tank is used to heat the circulating water in the first coil, and then the circulating water in the first coil is heated and enters the second cooling assembly, the temperature difference between the circulating water in the second cooling assembly and the insulating layer of the cable is not too large, that is, the circulating water is gradually heated to cool the cable insulating layer in different stages, so that the temperature difference between the insulating layer in each temperature stage and the circulating water is in a safe range during the progress of the cable insulating layer, and the cooling effect of the cable insulating layer is improved.

[0026] The application is used for installing multiple groups of cooling assemblies by the bearing mechanism, so that the two groups of semicircular sleeves of the cooling assembly can be separated from each other, when the extruder needs to be manually led by the worker in the starting stage, the closed cooling assembly will affect the leading of the cable, therefore the driving bearing mechanism can separate the multiple groups of cooling assemblies to provide more operation space for the worker to lead the cable, and when the leading of the extruder is completed, the driving bearing mechanism makes the multiple groups of cooling assemblies closed to wrap and cool the cable. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the application;

[0028] Figure 2 It is a schematic diagram of the bearing mechanism structure of the application;

[0029] Figure 3 It is an enlarged view of A in the application; Figure 2

[0030] Figure 4 It is a schematic diagram of the distribution of the bearing mechanism and the first cooling assembly of the application;

[0031] Figure 5 It is a schematic diagram of the structure of the first cooling assembly of the application;

[0032] Figure 6 It is a schematic diagram of the distribution of the semicircular sleeve and the arc-shaped sponge of the application;

[0033] Figure 7 It is a schematic diagram of the structure of the cooling system of the application;​

[0034] Figure 8 is a zoomed-in view of B in Figure 4

[0035] Figure 9 is a zoomed-in view of C in Figure 7

[0036] BRIEF DESCRIPTION OF DRAWINGS

[0037] 1, extruder; 2, extrusion die; 3, first water tank; 4, second water tank; 5, third water tank; 6, fourth water tank; 7, fifth water tank; 8, water inlet pipe; 9, first coil pipe; 10, second coil pipe; 11, third coil pipe; 12, fourth coil pipe; 13, water outlet pipe; 14, water hose; 15, first cooling assembly; 1501, semicircular sleeve; 1502, water inlet connector; 1503, arc-shaped sponge; 1504, sealing strip; 16, second cooling assembly; 17, third cooling assembly; 18, fourth cooling assembly; 19, fifth cooling assembly; 20, flow dividing connector; 21, bearing mechanism; 2101, bearing frame; 2102, driving rod; 2103, movable frame; 2104, connecting rod; 2105, spring. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0039] The embodiments of the present application will be described below according to the overall structure of the present application.

[0040] Please refer to Figures 1-7 ​​The utility model provides a kind of cable insulation extrusion equipment, including extruder 1 and extrusion die 2, one side of extruder 1 is provided with cooling system, cooling system includes multiple groups of water tank, multiple groups of coil pipe and multiple groups of cooling components, multiple groups of water tank are respectively first water tank 3, second water tank 4, third water tank 5, fourth water tank 6 and fifth water tank 7, first water tank 3, second water tank 4, third water tank 5, fourth water tank 6 are all L type, wherein fourth water tank 6 and fifth water tank 7 can be separately arranged also can be combined arrangement, multiple groups of coil pipe are respectively first coil pipe 9 arranged in first water tank 3, second coil pipe 10 arranged in second water tank 4, third coil pipe 11 arranged in third water tank 5 and fourth coil pipe 12 arranged in fourth water tank 6, coil pipe is fixed using support, multiple groups of cooling components are respectively first cooling component 15, second cooling component 16, third cooling component 17, fourth cooling component 18 and fifth cooling component 19, multiple groups of cooling components are respectively arranged above multiple groups of water tank, and first cooling component 15, second cooling component 16, third cooling component 17, fourth cooling component 18 and fifth cooling component 19 are same structure, multiple groups of cooling components are installed using bearing mechanism 21, one side of first water tank 3 is provided with water inlet pipe 8, one side of fifth water tank 7 is provided with water outlet pipe 13, and circulation system is connected between water outlet pipe 13 and water inlet pipe 8, circulation system is used to promote cooling water circulation, and cooling water is cooled by refrigeration system, water inlet pipe 8, water outlet pipe 13 and multiple groups of coil pipe are connected by setting water hose 14, and the end of water inlet pipe 8, water outlet pipe 13 and multiple groups of coil pipe is connected with cooling component by setting shunt joint 20 and water distribution hose, and the water flow of shunt joint 20 is small.

[0041] In the above embodiment, specifically refer to Figure 7 , the bottom of first water tank 3, second water tank 4, third water tank 5, fourth water tank 6 and fifth water tank 7 is provided with drain, and multiple groups of drains are connected by setting pipeline and circulation system, by setting drain in the bottom of first water tank 3, second water tank 4, third water tank 5, fourth water tank 6 and fifth water tank 7, then connecting circulation system by pipeline, the circulating water in water tank can be collected and discharged to circulation system for recooling and reuse.

[0042] In the above embodiment, specifically refer to Figure 5 And Figure 6 , first cooling component 15 includes two groups of symmetrical distribution half-round sleeve 1501, the side of two groups of half-round sleeve 1501 is provided with multiple groups of water inlet joint 1502, multiple groups of water inlet joint 1502 are used for connecting water distribution hose, water hose 14 and water distribution hose are all flexible material, and length matches the moving distance of cooling component, by setting water inlet joint 1502, water distribution hose and shunt joint 20, circulating water can evenly enter the inside of cooling component, so as to improve the heat exchange effect of circulating water and cable insulation layer.

[0043] In the above embodiment, please refer to Figure 5 and Figure 6 , the inner side of the two groups of half-round sleeve pipes 1501 are provided with arc-shaped sponges 1503, and the inner side of the arc-shaped sponges 1503 is provided with a matching slot with the cable. By setting the arc-shaped sponge 1503, more circulating water can be locked, and the loss of circulating water can be reduced. The arc-shaped sponge 1503 can make the circulating water and the cable better contact.

[0044] In the above embodiment, please refer to Figure 5 and Figure 6 , the side of the two groups of half-round sleeve pipes 1501 are provided with sealing strips 1504, and the sealing strips 1504 are used to seal the two groups of half-round sleeve pipes 1501. The end of the two groups of half-round sleeve pipes 1501 is provided with a hole matching the cable. By setting the sealing strip 1504, the two groups of half-round sleeve pipes 1501 can be separated from each other. The sealing strip 1504 can improve the sealing performance of the two groups of half-round sleeve pipes 1501 when closed.

[0045] In the above embodiment, please refer to Figure 2 and Figure 3 , the top of the water tank is provided with a bearing mechanism 21, and the bearing mechanism 21 is used to bear a plurality of cooling assemblies. By setting the bearing mechanism 21, the cooling assembly can be installed, and the bearing mechanism 21 can drive the plurality of cooling assemblies to separate and close.

[0046] In the above embodiment, please refer to Figure 2 and Figure 3 , the bearing mechanism 21 comprises a bearing frame 2101, and the inside of the bearing frame 2101 is rotatably connected with a driving rod 2102. The outside of the driving rod 2102 is symmetrically provided with a threaded groove. The inside of the bearing frame 2101 movably installs two groups of movable frames 2103, and the two groups of movable frames 2103 are symmetrically arranged and threadedly connected with the driving rod 2102. By setting the symmetrically distributed threaded grooves, the two groups of movable frames 2103 can be driven to move closer to or farther away from each other.

[0047] In the above embodiment, please refer to Figure 2 and Figure 3 , the bottom of the movable frame 2103 movably installs a plurality of connecting rods 2104, and the outside of the plurality of connecting rods 2104 is sleeved with a spring 2105, and the plurality of connecting rods 2104 are respectively fixedly connected with a plurality of cooling assemblies. By setting the plurality of connecting rods 2104 and the spring 2105 to install the cooling assembly, moving the movable frame 2103 drives the connecting rod 2104 to move, which can drive the two groups of half-round sleeve pipes 1501 of the cooling assembly to close.

[0048] In the above embodiments, please refer to Figure 7 , the plurality of groups of coil pipes are respectively immersed in corresponding water tanks, and the plurality of groups of coil pipes are copper pipes, by setting the coil pipes made of copper, the heat exchange efficiency of the circulating water in the coil pipes and the circulating water in the water tanks can be improved.

[0049] In the specific work, first, the staff drives the driving rod 2102 to rotate, so that the two groups of movable frames 2103 are separated, so that the plurality of cooling assemblies are opened, then the staff starts the extruding machine 1, and the lead of the cable is connected to the traction device, the traction device is used to pull the cable, when the cable insulation layer extruded by the extruding die 2 is uniformly distributed, the staff rotates the driving rod 2102 again to close the plurality of cooling assemblies.

[0050] Then, the circulating system of cooling water is started, the circulating water enters from the water inlet pipe 8, part of the circulating water enters the semicircular sleeve 1501 of the first cooling assembly 15 through the shunt joint 20 and the water distribution hose, the circulating water soaks the two groups of arc-shaped sponges 1503 of the first cooling assembly 15, and then contacts the insulation layer of the cable, the circulating water and the insulation layer of the cable contact heat exchange, and then the circulating water overflows from the two end holes of the semicircular sleeve 1501 and enters the first water tank 3.

[0051] The circulating water entering the water inlet pipe 8, another part of the circulating water directly enters the first coil pipe 9 through the water passing hose 14, the first coil pipe 9 is immersed in the first water tank 3, and the circulating water in the first water tank 3 is the circulating water after being heated, and the temperature is higher than that of the circulating water in the first coil pipe 9, so the circulating water in the first water tank 3 can heat the circulating water in the first coil pipe 9.

[0052] Then, the circulating water in the first coil pipe 9 after being heated enters the second cooling assembly 16, the circulating water after being heated contacts the cable with higher temperature to exchange heat, that is, the temperature difference between the cable in the second cooling assembly 16 and the circulating water in the first coil pipe 9 is kept safe, so as to reduce the stress of the cable during cooling.

[0053] Similarly, the circulating water in the second water tank 4 also heats the circulating water in the second coil pipe 10, so that the temperature difference between the cable in the third cooling assembly 17 and the circulating water in the second coil pipe 10 is also kept safe, the temperature difference between the cable in the fourth cooling assembly 18 and the circulating water in the third coil pipe 11 is also kept safe, and the temperature difference between the cable in the fifth cooling assembly 19 and the circulating water in the fourth coil pipe 12 is also kept safe.

[0054] Finally, the circulating water enters the circulating system from the water outlet pipe 13, and the circulating water in each water tank also enters the circulating system to participate in cooling and recycling.

[0055] The temperature of the circulating water for cooling the cable insulation layer in each cooling assembly is raised in a gradient, so that the circulating water can better cool the cable insulation layer, reduce the occurrence of internal stress and cracking of the cable insulation layer material, and improve the quality of cable extrusion.

[0056] Although the embodiments of the present application have been shown and described, the specific embodiments are merely illustrative of the present application, and are not intended to limit the present application, and the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner, and those skilled in the art can make modifications, replacements and variations of the embodiments without creative contribution after reading the specification, as long as they are within the scope of the claims of the present application.

Claims

1. A cable insulation extrusion apparatus, comprising an extruder (1) and an extrusion die (2), characterized in that: A cooling system is provided on one side of the extruder (1). The cooling system includes multiple sets of water tanks, multiple sets of coils, and multiple sets of cooling components. The multiple sets of coils are immersed in the corresponding water tanks, and all sets of coils are copper pipes. The multiple sets of water tanks are a first water tank (3), a second water tank (4), a third water tank (5), a fourth water tank (6), and a fifth water tank (7). The multiple sets of coils are a first coil (9) installed inside the first water tank (3), a second coil (10) installed inside the second water tank (4), a third coil (11) installed inside the third water tank (5), and a fourth coil (12) installed inside the fourth water tank (6). The multiple sets of cooling components are a first cooling component (15), a second cooling component (16), a third cooling component (17), a fourth cooling component (18), and a fifth cooling component (19). The multiple sets of cooling components are respectively installed above the multiple sets of water tanks. The first water tank (3) is provided with an inlet pipe (8) on one side, and an outlet pipe (13) is provided on one side of the fifth water tank (7). A circulation system is connected between the outlet pipe (13) and the inlet pipe (8). The inlet pipe (8), the outlet pipe (13) and the multiple sets of coils are connected by a water-passing hose (14). The ends of the inlet pipe (8), the outlet pipe (13) and the multiple sets of coils are connected to the cooling component by a diversion connector (20) and a water-diversion hose. The cooling component includes two sets of symmetrically distributed semi-circular sleeves. The sides of the two sets of semi-circular sleeves are provided with multiple sets of water inlet connectors. The multiple sets of water inlet connectors are used to connect the water-diversion hose. The inner sides of the two sets of semi-circular sleeves are provided with arc-shaped sponges. The inner sides of the arc-shaped sponges are provided with fitting grooves that match the cables. The sides of the two sets of semi-circular sleeves are provided with sealing strips. The sealing strips are used to seal the two sets of semi-circular sleeves. The ends of the two sets of semi-circular sleeves are provided with holes that match the cables.

2. The cable insulation extrusion equipment according to claim 1, characterized in that: The bottom of the first water tank (3), the second water tank (4), the third water tank (5), the fourth water tank (6) and the fifth water tank (7) are all provided with drain outlets, and multiple sets of drain outlets are connected by pipes and circulation systems.

3. The cable insulation extrusion equipment according to claim 2, characterized in that: The top of the water tank is equipped with a support mechanism (21), which is used to support multiple sets of cooling components.

4. The cable insulation extrusion equipment according to claim 3, characterized in that: The bearing mechanism (21) includes a bearing frame (2101), and a drive rod (2102) is rotatably connected inside the bearing frame (2101). Threaded grooves are symmetrically distributed on the outside of the drive rod (2102). Two sets of movable frames (2103) are movably installed inside the bearing frame (2101), and the two sets of movable frames (2103) are symmetrically arranged. The two sets of movable frames (2103) are threadedly connected to the drive rod (2102).

5. The cable insulation extrusion equipment according to claim 4, characterized in that: The bottom of the movable frame (2103) is movably installed with multiple sets of connecting rods (2104), and each set of connecting rods (2104) is fitted with a spring (2105), and the multiple sets of connecting rods (2104) are fixedly connected to multiple sets of cooling components respectively.

6. The cable insulation extrusion equipment according to claim 5, characterized in that: Both the water inlet hose (14) and the water outlet hose are made of flexible material, and their lengths are matched to the moving distance of the cooling components.

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