An extrusion insulation die for extruding fire-resistant low-voltage cables

Abstract

This utility model discloses an extrusion insulation die for extruding insulated fire-resistant low-voltage cables, relating to the technical field of extrusion die cooling devices. The utility model includes an extrusion insulation die body, with a fixed base connected to one side of the die body, and an installation mechanism on the surface of the die body. Through the cooperation of the installation ring, installation plate, and installation bolts of the installation mechanism, the three cooling rings of the first cooling component can be independently disassembled and installed. During installation, the limiting groove and limiting rod ensure precise positioning, and the installation bolts form a stable connection after tightening. During maintenance, only the bolts need to be loosened to disassemble and clean or replace a single cooling ring. This design effectively solves the problem of traditional integrated dies requiring complete disassembly, while avoiding damage to the die's precision from frequent disassembly and assembly, significantly extending the die's service life. The split structure also facilitates quick replacement of suitable cooling components for different cable specifications, improving production line flexibility.

Description

Technical Field

[0001] This utility model belongs to the technical field of extrusion die cooling device, and in particular relates to an extrusion insulation die for extruding insulated fire-resistant low-voltage cables. Background Technology

[0002] Extrusion insulation dies for fire-resistant low-voltage cables are key pieces of equipment in cable production. They are mainly used to uniformly coat the conductor surface with an insulation layer. Their functions include: insulation layer forming, through high-temperature melt extrusion, to tightly coat the insulation material onto the cable conductor, ensuring uniform insulation layer thickness and electrical performance; fire resistance assurance, for the special requirements of fire-resistant cables, the die must be adapted to the extrusion of high-filling, high-viscosity fire-resistant materials to avoid material degradation or uneven flow; cooling and shaping, through an efficient cooling system to rapidly solidify the molten insulation material, preventing deformation or surface defects, and ensuring the mechanical strength and fire resistance stability of the cable.

[0003] Existing extrusion insulation dies still have some problems during use. For example, the cooling channels of most dies are integrated with the die body. After long-term use, minerals in the coolant are prone to deposit to form scale, which can block the flow channels, reduce heat exchange efficiency, and affect the uniformity of insulation layer cooling. Since the cooling system is not removable, cleaning the scale requires stopping the machine and disassembling the entire die, which is not only time-consuming but may also affect the die precision due to frequent disassembly and assembly.

[0004] To address these issues, we provide an extrusion insulation die for extruded fire-resistant low-voltage cables. Utility Model Content

[0005] The purpose of this utility model is to provide an extrusion insulation mold for extruded insulated fire-resistant low-voltage cables. Through the cooperation of the installation mechanism and the cooling mechanism, it solves the problem in the existing extrusion insulation molds where the cooling channel and the mold body are integrated, and after long-term use, minerals in the coolant are easily deposited to form scale, which blocks the flow channel and leads to a decrease in heat exchange efficiency.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0007] This utility model relates to an extrusion insulation die for extruded insulated fire-resistant low-voltage cables, comprising an extrusion insulation die body, a fixed base connected to one side of the extrusion insulation die body, an installation mechanism provided on the surface of the extrusion insulation die body, the installation mechanism including an installation ring fixedly connected to the surface of the extrusion insulation die body, and installation plates fixedly connected to both sides of the installation ring, and a cooling mechanism provided on the surface of the extrusion insulation die body, the cooling mechanism including a first cooling component provided on the surface of the extrusion insulation die body, a cooling pipe provided on one side of the extrusion insulation die body, and a second cooling component provided inside the cooling pipe.

[0008] The present invention is further configured such that the first cooling component includes a first cooling ring disposed on one side of the surface of the extrusion insulating mold body, a second cooling ring disposed on the other side of the surface of the extrusion insulating mold body, and a third cooling ring disposed on the surface of the extrusion insulating mold body.

[0009] The present invention is further configured such that cooling channels are provided inside the first cooling ring, the second cooling ring and the third cooling ring, an inlet pipe is connected to the front side of the first cooling ring, an outlet pipe is connected to one side of the second cooling ring, and connecting pipes are connected to both sides of the third cooling ring.

[0010] The present invention is further configured such that both the first cooling component and the mounting plate have mounting through holes, and mounting bolts are threaded into the mounting through holes.

[0011] The present invention is further configured such that the second cooling component includes a nozzle fixedly connected inside the cooling pipe, a nozzle communicating with the surface of the nozzle, and a delivery pipe communicating with the nozzle.

[0012] The present invention is further configured such that the nozzle is annular in shape and the number of nozzles is four.

[0013] The present invention is further configured such that a limiting groove is formed inside the first cooling ring, the second cooling ring and the third cooling ring, and a limiting rod is inserted into the limiting groove.

[0014] The present invention has the following beneficial effects.

[0015] 1. This utility model allows for the independent disassembly and assembly of the three cooling rings of the first cooling component through the cooperation of the mounting ring, mounting plate, and mounting bolts of the mounting mechanism. During installation, the limiting groove and limiting rod ensure precise positioning, and the mounting bolts form a stable connection after tightening. During maintenance, only the bolts need to be loosened to disassemble a single cooling ring for cleaning or replacement. This design effectively solves the problem of traditional integrated molds requiring overall disassembly, while avoiding damage to the mold's precision caused by frequent disassembly and assembly, significantly extending the mold's service life. The split structure also facilitates the quick replacement of suitable cooling components for different cable specifications, improving the flexibility of the production line.

[0016] 2. In this invention, the cooling liquid enters the first cooling ring through the inlet pipe, flows through the cooling channels of the second and third cooling rings in sequence via the connecting pipe to absorb heat from the mold, forming a closed-loop primary cooling. The heated liquid is then introduced from the outlet pipe through the delivery pipe into the annular spray nozzle, atomized by the nozzle and evenly sprayed onto the cable surface to complete the secondary cooling. This design, through staged cooling and coolant recycling, avoids the inefficiency of traditional single-stage cooling and prevents cable surface cracks caused by direct low-temperature spraying.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a perspective view of an extrusion insulation die for extruded fire-resistant low-voltage cables.

[0020] Figure 2 This is a split-state diagram of the first cooling component in an extrusion insulation die for an extruded insulated fire-resistant low-voltage cable.

[0021] Figure 3 This is a front view of a limiting rod in an extrusion insulation die for extruded fire-resistant low-voltage cables.

[0022] Figure 4 This is a cross-sectional view of a cooling tube in an extrusion insulation die for an extruded insulated fire-resistant low-voltage cable.

[0023] Figure 5 This is a structural diagram of the second cooling component in an extrusion insulation die for extruded insulated fire-resistant low-voltage cables.

[0024] In the attached diagram: 1. Extrusion insulation mold body; 2. Fixing base; 3. Mounting mechanism; 301. Mounting ring; 302. Mounting plate; 4. Cooling mechanism; 401. First cooling component; 4011. First cooling ring; 4012. Second cooling ring; 4013. Third cooling ring; 402. Cooling pipe; 403. Second cooling component; 4031. Spray pipe; 4032. Nozzle; 4033. Conveying pipe; 5. Water inlet pipe; 6. Water outlet pipe; 7. Connecting pipe; 8. Limiting groove; 9. Limiting rod. Detailed Implementation

[0025] The technical solutions of the present invention will be described below with reference to the accompanying drawings of the embodiments of the present invention. The described embodiments are only some embodiments of the present invention, and not all embodiments. Example

[0026] Please see Figures 1-5 This utility model is an extrusion insulation mold for extruded insulated fire-resistant low-voltage cables, including an extrusion insulation mold body 1, a fixed base 2 connected to one side of the extrusion insulation mold body 1, an installation mechanism 3 provided on the surface of the extrusion insulation mold body 1, the installation mechanism 3 including an installation ring 301 fixedly connected to the surface of the extrusion insulation mold body 1, and installation plates 302 fixedly connected to both sides of the installation ring 301, and a cooling mechanism 4 provided on the surface of the extrusion insulation mold body 1, the cooling mechanism 4 including a first cooling component 401 provided on the surface of the extrusion insulation mold body 1, a cooling pipe 402 provided on one side of the extrusion insulation mold body 1, and a second cooling component 403 provided inside the cooling pipe 402.

[0027] Specifically: The installation mechanism 3 is designed to enable modular fixing and quick assembly / disassembly of the cooling components. The mounting ring 301 is fixed to the surface of the extrusion insulation mold body 1. The mounting plates 302 on both sides are fixedly connected to the first cooling component 401 via mounting bolts. During installation, the limiting grooves 8 of the first cooling ring 4011, the second cooling ring 4012, and the third cooling ring 4013 are aligned with the limiting rods 9 on the extrusion insulation mold body 1 to ensure precise positioning. After loosening the mounting bolts, any cooling ring can be individually disassembled for cleaning or replacement, avoiding the need for complete disassembly of traditional integrated molds and reducing... Minimal downtime is achieved by using the cooling mechanism 4 to cool the extrusion insulation mold body 1 and the cable in stages. The cooling liquid enters the first cooling ring 4011 from the water inlet pipe 5, flows through the cooling channels of the second cooling ring 4012 and the third cooling ring 4013 in sequence via the connecting pipe 7, forming a circulation path to remove heat from the mold, and finally exits from the water outlet pipe 6. The discharged cooling liquid enters the annular spray pipe 4031 through the delivery pipe 4033, and is atomized by multiple nozzles 4032 and sprayed onto the surface of the cable to achieve rapid shaping. The entire process avoids scale buildup through the split design, while improving cooling uniformity. Example

[0028] Please see Figures 1-5 Based on Embodiment 1, the first cooling component 401 includes a first cooling ring 4011 disposed on one side of the surface of the extrusion insulating mold body 1, a second cooling ring 4012 disposed on the other side of the surface of the extrusion insulating mold body 1, and a third cooling ring 4013 disposed on the surface of the extrusion insulating mold body 1. The third cooling ring 4013 is located between the first cooling ring 4011 and the second cooling ring 4012. A cooling pipe 402 is fixedly connected to one side of the second cooling ring 4012. Cooling grooves are provided inside the first cooling ring 4011, the second cooling ring 4012, and the third cooling ring 4013. A water inlet pipe 5 is connected to the front of the first cooling ring 4011, a water outlet pipe 6 is connected to one side of the second cooling ring 4012, and connecting pipes 7 are connected to both sides of the third cooling ring 4013. The external cooling liquid enters the first cooling component 401 through the water inlet pipe 5. The first cooling component 401 and the mounting plate 302 are both provided with mounting through holes, and mounting bolts are threaded into the mounting through holes. The second cooling component 403 includes a spray pipe 4031 fixedly connected inside the cooling pipe 402, a nozzle 4032 connected to the surface of the spray pipe 4031, and a delivery pipe 4033 connected to the spray pipe 4031. The delivery pipe 4033 is connected to the water outlet pipe 6. The spray pipe 4031 is annular in shape, and there are four spray pipes 4031. The first cooling ring 4011, the second cooling ring 4012 and the third cooling ring 4013 are all provided with limiting grooves 8. Limiting rods 9 are inserted into the limiting grooves 8 and are fixedly connected to the surface of the extrusion insulating mold body 1.

[0029] Specifically: The first cooling component 401 rapidly cools the extrusion insulation mold body 1 using cooling liquid. External cooling liquid enters the first cooling component 401 through the inlet pipe 5. The connecting pipe 7 connects the first cooling ring 4011, the second cooling ring 4012, and the third cooling ring 4013, creating a continuous flow for the cooling liquid. The outlet pipe 6 transports the used cooling liquid to the second cooling component 403. The through holes and mounting bolts are used to fix the first cooling component 401 inside the mounting plate 302, facilitating quick replacement of the first cooling component 401. The second cooling component 403 is used to spray the applied cooling liquid onto the surface of the extruded cable through atomization, thereby cooling the cable again. The limiting groove 8 and the limiting rod 9 limit the first cooling ring 4011, the second cooling ring 4012, and the third cooling ring 4013 to prevent displacement after installation.

[0030] The working principle of this utility model is as follows: The installation mechanism 3 realizes the quick installation and removal of the first cooling component 401 through the installation ring 301 and the installation plate 302. During installation, the first cooling ring 4011, the second cooling ring 4012 and the third cooling ring 4013 are precisely aligned with the limiting rod 9 on the extrusion insulation mold body 1 through the limiting groove 8, ensuring that the cooling channel is completely in contact with the hot zone of the extrusion insulation mold body 1. The installation bolt passes through the installation through hole of the installation plate 302 and the first cooling component 401 and is locked to form a stable connection. When maintenance is required, any cooling ring can be removed individually by simply loosening the bolt, avoiding the disassembly of the entire mold.

[0031] The cooling fluid enters the first cooling ring 4011 through the inlet pipe 5, and flows sequentially through the cooling channels of the second cooling ring 4012 and the third cooling ring 4013 via the connecting pipe 7, forming a closed-loop passage to absorb heat from the mold. The cooling fluid is discharged from the outlet pipe 6 and introduced into the annular spray nozzle 4031 of the second cooling component 403 through the delivery pipe 4033. After being atomized by the nozzle 4032, it is evenly sprayed onto the cable surface to cool the cable. Since the cooling fluid has already been heated after flowing through the first cooling component 401, it can cool the cable to a certain extent after being sprayed onto the cable surface, while avoiding the coolant temperature being too low, which could cause the cable to crack due to sudden cooling. The split design not only avoids scale buildup but also realizes the recycling of coolant, significantly improving cooling efficiency.

[0032] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An extrusion insulation die for extruding insulated fire-resistant low-voltage cables, comprising an extrusion insulation die body (1), characterized in that: The extrusion insulating mold body (1) has a fixed base (2) connected to one side; The surface of the extrusion insulation mold body (1) is provided with an installation mechanism (3), the installation mechanism (3) includes an installation ring (301) fixedly connected to the surface of the extrusion insulation mold body (1), and an installation plate (302) fixedly connected to both sides of the installation ring (301). The surface of the extrusion insulation mold body (1) is provided with a cooling mechanism (4). The cooling mechanism (4) includes a first cooling component (401) disposed on the surface of the extrusion insulation mold body (1), a cooling tube (402) disposed on one side of the extrusion insulation mold body (1), and a second cooling component (403) disposed inside the cooling tube (402).

2. The extrusion insulation die for extruded fire-resistant low-voltage cables according to claim 1, characterized in that: The first cooling component (401) includes a first cooling ring (4011) disposed on one side of the surface of the extrusion insulation mold body (1), a second cooling ring (4012) disposed on the other side of the surface of the extrusion insulation mold body (1), and a third cooling ring (4013) disposed on the surface of the extrusion insulation mold body (1).

3. The extrusion insulation die for extruded fire-resistant low-voltage cables according to claim 2, characterized in that: The first cooling ring (4011), the second cooling ring (4012) and the third cooling ring (4013) are all provided with cooling channels. The front side of the first cooling ring (4011) is connected to a water inlet pipe (5), the side of the second cooling ring (4012) is connected to a water outlet pipe (6), and both sides of the third cooling ring (4013) are connected to connecting pipes (7).

4. The extrusion insulation die for extruded fire-resistant low-voltage cables according to claim 1, characterized in that: Both the first cooling component (401) and the mounting plate (302) have mounting through holes, and mounting bolts are threaded into the mounting through holes.

5. The extrusion insulation die for extruded fire-resistant low-voltage cables according to claim 1, characterized in that: The second cooling component (403) includes a nozzle (4031) fixedly connected inside the cooling pipe (402), a nozzle (4032) connected to the surface of the nozzle (4031), and a delivery pipe (4033) connected to the nozzle (4031).

6. The extrusion insulation die for extruded fire-resistant low-voltage cables according to claim 5, characterized in that: The nozzle (4031) is annular in shape, and there are four nozzles (4031).

7. The extrusion insulation die for extruded fire-resistant low-voltage cables according to claim 2, characterized in that: The first cooling ring (4011), the second cooling ring (4012) and the third cooling ring (4013) all have a limiting groove (8) inside, and a limiting rod (9) is inserted inside the limiting groove (8).

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