Cable insulation extrusion equipment

Abstract

The invention discloses cable insulation extrusion equipment, and relates to the field of cable extruder application, the cable insulation extrusion equipment comprises an extruding machine and an extruding mold, one side of the extruding machine is provided with a cooling system, the cooling system comprises a plurality of groups of water tanks, a plurality of groups of coil pipes and a plurality of groups of cooling assemblies, one side of the first water tank is provided with a water inlet pipe, and the other side of the second water tank is provided with a water outlet pipe; a water outlet pipe is arranged on one side of the fifth water tank, 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 sets of coil pipes are connected through water passing hoses, and the ends of the water inlet pipe, the water outlet pipe and the multiple sets of coil pipes are connected with the cooling assembly through flow dividing connectors and water dividing hoses. According to the invention, by arranging the multiple groups of water tanks, the multiple groups of heat exchange coils and the multiple groups of cooling assemblies, the temperature of circulating water is gradually increased according to gradients, so that the insulating layer of the cable is cooled by the circulating water with more uniform temperature difference distribution, and the internal stress of the insulating layer of the cable 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 avoiding excessive temperature difference is 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 prone 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 sponge, more circulating water can be locked, and the loss of circulating water can be reduced, and the arc sponge can make the circulating water and the cable better contact.

[0014] The application further provides that the side surface of each of the two groups of semi-circular sleeve pipes is provided with a sealing strip, the sealing strip is used for sealing the two groups of semi-circular sleeve pipes, and the end portion of each of the two groups of semi-circular sleeve pipes is provided with a hole matched with the cable.

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

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

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

[0018] The application further provides that the bearing mechanism comprises a bearing frame, a driving rod is rotatably connected to the inside of the bearing frame, a plurality of screw grooves are symmetrically distributed on the outside of the driving rod, two groups of movable frames are movably mounted in the inside of the bearing frame, 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 move close to or away from each other.

[0020] The application further provides that a plurality of connecting rods are movably mounted at the bottom of each of the movable frames, springs are sleeved on the outside of each of the plurality of connecting rods, and each of the plurality of connecting rods is fixedly connected with a plurality of cooling assemblies.

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

[0022] The application further provides that each of the plurality of coil pipes is immersed in a corresponding water tank, and each of the plurality of coil pipes is a copper pipe.

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

[0024] In summary, the application mainly has the following beneficial effects: This invention utilizes multiple sets of water tanks, multiple sets of heat exchange coils, and multiple sets of cooling components to gradually increase the temperature of the circulating water. This allows for more uniform temperature distribution in the circulating water, cooling the cable insulation layer and reducing internal stress. A portion of the low-temperature circulating water enters the first cooling component through the inlet pipe for deepest cooling of the cable insulation layer, while the remaining portion enters the first coil, which is immersed in the first water tank. The water in the first water tank originates from the first cooling component, meaning the circulating water entering the first cooling component through the inlet pipe interacts with the cable. After the insulation layer undergoes heat exchange, it drips into the first water tank. Therefore, the temperature of the circulating water in the first water tank is higher than that of the circulating water in the first coil. The circulating water in the first water tank is used to heat and insulate the circulating water in the first coil. When the heated circulating water in the first coil enters the second cooling component, the temperature difference between the circulating water in the second cooling component and the cable insulation layer will not be too large. In other words, the circulating water will be gradually heated to cool the cable insulation layer at different stages. Thus, during the cable insulation layer's journey, the temperature difference between the insulation layer and the circulating water at each temperature stage is within a safe range, improving the cooling effect of the cable insulation layer.

[0025] This invention uses a support mechanism to install multiple sets of cooling components, allowing the two sets of semi-circular sleeves of the cooling components to be separated from each other. When the extruder is started, the operator needs to manually lead the cable. The closed cooling components will affect the cable lead-out. Therefore, driving the support mechanism can separate the multiple sets of cooling components to provide more operating space for the operator to lead the cable. After the extruder has finished leading the cable, driving the support mechanism will close the multiple sets of cooling components to wrap and cool the cable. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the supporting mechanism structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of point A in the image; Figure 4 This is a schematic diagram showing the distribution of the support mechanism and the first cooling component of the present invention; Figure 5 This is a schematic diagram of the first cooling component structure of the present invention; Figure 6 This is a schematic diagram showing the distribution of the semi-circular sleeve and the arc-shaped sponge in this invention; Figure 7 This is a schematic diagram of the cooling system structure of the present invention; Figure 8 For the present invention Figure 4 Enlarged view of point B in the image; Figure 9 For the present inventionFigure 7 Enlarged view of C in FIG. 1.

[0027] Explanation of reference numerals: 1, extruder; 2, extrusion mold; 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

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely 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.

[0029] The embodiments of the present application will be described below according to the overall structure of the present application.

[0030] Please refer to Figures 1-7The 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.

[0031] 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.

[0032] 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, and 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 to connect water distribution hose, water hose 14 and water distribution hose are all flexible material, and the length matches the moving distance of cooling component, and circulation water can be evenly entered into cooling component by setting water inlet joint 1502, water distribution hose and shunt joint 20, so as to improve the heat exchange effect of circulation water and cable insulation layer.

[0033] 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 arranging the arc-shaped sponges 1503, more circulating water can be locked, and the loss of circulating water can be reduced. The arc-shaped sponges 1503 can make the circulating water and the cable better contact.

[0034] 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 arranging 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.

[0035] 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 arranging 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.

[0036] 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 arranging 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.

[0037] 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. The plurality of connecting rods 2104 are respectively fixedly connected with a plurality of cooling assemblies. By arranging the plurality of connecting rods 2104 and the spring 2105 to install the cooling assembly, the movement of 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.

[0038] 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.

[0039] In the specific work, first, the staff drives the driving rod 2102 to rotate, so that the two groups of movable racks 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.

[0040] 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.

[0041] 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.

[0042] Then, the circulating water in the first coil pipe 9 enters the second cooling assembly 16 after being heated, 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.

[0043] 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 of the cable in the third cooling assembly 17 and the temperature of the circulating water in the second coil pipe 10 also keep a safe temperature difference, the temperature of the cable in the fourth cooling assembly 18 and the temperature of the circulating water in the third coil pipe 11 also keep a safe temperature difference, and the temperature of the cable in the fifth cooling assembly 19 and the temperature of the circulating water in the fourth coil pipe 12 also keep a safe temperature difference.

[0044] Finally, the circulating water enters the circulating system from the water outlet pipe 13, and the circulating water in each water tank also concentrates into the circulating system to participate in cooling and recycling.

[0045] 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.

[0046] 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), characterised in that: The side of the extruder (1) is provided with a cooling system, the cooling system includes a plurality of water tanks, a plurality of coils and a plurality of cooling components, the plurality of water tanks are respectively first water tank (3), second water tank (4), third water tank (5), fourth water tank (6) and fifth water tank (7), the plurality of coils are respectively first coil (9) arranged in the first water tank (3), second coil (10) arranged in the second water tank (4), third coil (11) arranged in the third water tank (5) and fourth coil (12) arranged in the fourth water tank (6), the plurality 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), the plurality of cooling components are arranged above the plurality of water tanks, the side of the first water tank (3) is provided with water inlet pipe (8), the side of the fifth water tank (7) is provided with water outlet pipe (13), the water outlet pipe (13) and the water inlet pipe (8) are connected with a circulating system, the water inlet pipe (8), the water outlet pipe (13) and the plurality of coils are connected through the water hose (14), and the ends of the water inlet pipe (8), the water outlet pipe (13) and the plurality of coils are connected with the cooling components through the shunt joint (20) and the water distribution hose.

2. A cable insulation extrusion apparatus according to claim 1, characterised 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) is provided with a drain, and the plurality of drains are connected through the pipeline and the circulating system.

3. A cable insulation extrusion apparatus according to claim 2, characterised in that: The first cooling component (15) includes two groups of symmetrical half-round sleeve pipes (1501), the side of the two groups of half-round sleeve pipes (1501) is provided with a plurality of water inlet joints (1502), and the plurality of water inlet joints (1502) are used for connecting the water distribution hose.

4. A cable insulation extrusion apparatus according to claim 3, characterised in that: The inner side of the two groups of half-round sleeve pipes (1501) is provided with an arc-shaped sponge (1503), and the inner side of the arc-shaped sponge (1503) is provided with a matching slot.

5. A cable insulation extrusion apparatus according to claim 4, characterised in that: The side of the two groups of half-round sleeve pipes (1501) is provided with a sealing strip (1504), the sealing strip (1504) is used for sealing the two groups of half-round sleeve pipes (1501), and the ends of the two groups of half-round sleeve pipes (1501) are provided with holes matched with the cable.

6. A cable insulation extrusion apparatus according to claim 5, characterised in that: The top of the water tank is provided with a bearing mechanism (21), and the bearing mechanism (21) is used for bearing a plurality of cooling components.

7. A cable insulation extrusion apparatus according to claim 6, characterised in that: The bearing mechanism (21) includes 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) is movably provided with two groups of movable frames (2103), the two groups of movable frames (2103) are symmetrically arranged, and the two groups of movable frames (2103) and the driving rod (2102) are threadedly connected.

8. A cable insulation extrusion apparatus according to claim 7, characterised in that: The bottom of the movable frame (2103) is movably provided with a plurality of connecting rods (2104), 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 the plurality of cooling components.

9. A cable insulation extrusion apparatus according to claim 8, characterised in that: The multiple groups of the coil pipes are respectively immersed in corresponding water tanks, and the multiple groups of the coil pipes are copper pipes.

10. A cable insulation extrusion apparatus according to claim 9, characterised in that: The water supply hose (14) and the water distribution hose are both made of flexible material, and their lengths are matched with the moving distance of the cooling assembly.

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