BV wire and extrusion equipment for producing BV wire

Abstract

The invention relates to the technical field of BV wire production, and discloses a BV wire and extrusion equipment for producing the BV wire, the BV wire comprises a support frame, the middle part of the outer wall of the support frame is fixedly connected with a fixed frame, the inner wall of the fixed frame is provided with a mold, the mold is internally provided with a copper wire, the upper part of the outer wall of the support frame is fixedly connected with a heat dissipation frame, and the heat dissipation frame is fixedly connected with an extrusion die. An electric push rod is arranged in the heat dissipation frame, the output end of the electric push rod is fixedly connected to the outer wall of a PVC storage box, a discharging head is fixedly connected to the lower surface of the PVC storage box, a feeding port is fixedly connected to the outer wall of the mold, and a PE injection assembly is arranged on the outer wall of the feeding port. The surface of the copper wire is firstly coated with the PE material layer, then the surface of the PE material layer is coated with the PVC material layer, two layers of protection films are formed, the thickness of the whole insulation layer is not changed, the PE layer is good in insulation degree, moisture-proof and wear-resistant, BV is improved, static electricity leakage is not prone to being caused, the insulativity of the BV wire is improved, and short circuit is not prone to being caused.

Description

Technical Field

[0001] The invention relates to the technical field of BV line production, in particular to a BV line and extrusion equipment for producing the BV line. Background Art

[0002] In the wire and cable industry, BE wire is a new type of wire product that has gradually entered people's field of vision. BE wire is a copper core irradiated cross-linked low-smoke halogen-free polyolefin insulated wire. "B" stands for cloth wire and "E" reflects the characteristics of its insulation material.

[0003] As the scale of construction continues to expand and power facilities become increasingly complex, the demand and quality requirements for BV wires are increasing significantly. The traditional manual or simple production of BV wires is not only extremely inefficient and difficult to meet the supply needs of large-scale projects, but also extremely difficult to control quality. For example, it is difficult to ensure the uniform thickness of the insulation layer through manual operation, and it is easy for the insulation performance to not meet the standards, burying hidden dangers for power safety. The emergence of extrusion equipment for BV wires has effectively solved these problems. It can achieve uniform plasticization of plastic raw materials by precisely controlling parameters such as screw speed and temperature, ensure the stability of the quality of the insulation layer, and improve the insulation performance and safety of the BV wire. Its cooling system can also scientifically regulate the cooling speed, reduce stress concentration in the insulation layer, and extend the service life of the BV wire.

[0004] However, the conductor of traditional BV cables is usually made of copper, and the outer insulation layer is made of polyvinyl chloride (PVC). The single-layer PVC tube wrapped on the outside is prone to static leakage, low insulation and easy short circuit. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a BV line and an extrusion device for producing the BV line, which solves the problem that the single-layer PVC tube layer wrapped on the outside is prone to static leakage, low insulation and easy short circuit.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: An extrusion device for producing BV lines, comprising a support frame, a fixed frame is fixedly connected to the middle of the outer wall of the support frame, a mold is provided on the inner wall of the fixed frame, copper wire is provided inside the mold, a heat dissipation frame is fixedly connected to the upper part of the outer wall of the support frame, an electric push rod is provided inside the heat dissipation frame, the output end of the electric push rod is fixedly connected to the outer wall of a PVC storage box, a discharge head is fixedly connected to the lower surface of the PVC storage box, a feed port is fixedly connected to the outer wall of the mold, a PE injection assembly is provided on the outer wall of the feed port, the PE injection assembly is connected to the fixed frame by bolts, and a support assembly is provided at the lower part of the outer wall of the support frame, the support assembly is used to support other parts.

[0007] Preferably, the support assembly comprises a limiting bracket, an outer wall of the limiting bracket is fixedly connected to a lower portion of an outer wall of the support frame, and an L-shaped bracket is fixedly connected to the outer wall of the limiting bracket.

[0008] Preferably, the interior of the mold is designed with a T-shaped three-way structure, the feed port and the discharge head are staggered, and the feed port is close to the left side.

[0009] Preferably, the copper wire passes through the fixed frame and the mold from left to right.

[0010] Preferably, both sides of the outer wall of the L-shaped bracket are fixedly connected to the shell, the interior of the shell is slidably connected to a sliding column, one end of the sliding column is fixedly connected to a pulling block, the other end of the sliding column is fixedly connected to a sliding block, the outer wall of the sliding block is slidably connected to the interior of the shell, the outer wall of the sliding column is fixedly connected to a tension spring, the outer wall of the sliding block is fixedly connected to an inner top column, the outer wall of the inner top column is fitted with a wiping cotton block, and the outer wall of the wiping cotton block is slidably connected to the interior of the shell.

[0011] Preferably, a first chamber is opened inside the shell, and the outer wall of the sliding block is slidably connected to the inner wall of the shell.

[0012] Preferably, a second chamber is provided inside a side of the housing close to the pulling block, and the outer wall of the tension spring is fixedly connected to the inner wall of the second chamber.

[0013] Preferably, the wiping soft cotton block is deformed by the force of the inner top column to fit the surface of the copper wire and will not fall off from the inside of the shell.

[0014] Preferably, the copper wire is located in the middle of the two side shells, and the gaps reserved in the two side shells and the positions where the copper wire passes through the fixed frame and the mold are in the same horizontal plane.

[0015] Preferably, a BV wire comprises a copper wire, a PE material layer, and a PVC material layer, wherein the PE material layer covers the surface of the copper wire, and the PVC material layer covers the surface of the PE material layer.

[0016] Working principle: When the equipment is needed, first pull the copper wire from the roller and pass it through the fixed frame and the mold and fix it on the winding mechanism on the other side. Then start the overall operation to drive the copper wire to move. At this time, first start the PE injection component to inject the molten PE material into the channel inside the mold through the feed port. At this time, the PE material will first cover the surface of the copper wire. As the copper wire is driven, the copper wire covered by the PE material will move to just below the discharge head. At this time, start the electric push rod inside the heat dissipation frame. Driven by the electric push rod, the molten PVC material inside the PVC storage box covers the surface of the PE material. After subsequent cooling and forming, two layers of protective film are formed, which are copper wire, PE layer, and PVC layer from the inside to the outside, and the combined thickness of the PE layer and the PVC layer is equal to the thickness of the PVC layer wrapped around the original copper wire. That is, the thickness of the overall insulation layer remains unchanged, the PE layer has good insulation, and is moisture-proof and wear-resistant, so that the improvement of BV is not easy to cause static electricity leakage, improve the insulation of the BV line and not easy to short-circuit.

[0017] Before the copper wire enters the fixed frame and the inside of the mold, the copper wire will first be wiped on the surface by the wiping cotton block pushed out by the inner ejector column. The wiping cotton block wipes the impurities or dust on the surface of the copper wire, making the subsequent PE insulation layer more uniform and dense, reducing the insulation resistance, improving the insulation reliability, and reducing the probability of safety accidents such as leakage and short circuit.

[0018] After the wiping cotton block has been used for a period of time, the worker pulls the pulling block, which drives the sliding column to move, and then drives the sliding block and the inner top column to move inside the first chamber, so that the wiping cotton block is no longer subjected to the thrust of the inner top column. The wiping cotton block is pulled upward to take out the wiping cotton block, and then it is turned over for assembly or replaced with a new one. The sliding column is released, and the sliding column is driven to move by the pulling of the tension spring installed inside the second chamber, and then the sliding block and the inner top column are driven to move, so that the inner top column pushes out the wiping cotton block again to wipe the surface of the copper wire, thereby facilitating the replacement of the wiping cotton block, reducing downtime, and improving work efficiency.

[0019] That is, this equipment can not only make it less likely for BV to cause static electricity leakage, improve the insulation of BV line and prevent short circuit, but also make the subsequent PE insulation layer more uniform and dense, reduce insulation resistance, improve insulation reliability, and reduce the probability of safety accidents such as leakage and short circuit. Finally, it can facilitate the replacement of wiping cotton blocks, reduce downtime and improve work efficiency.

[0020] The invention provides a BV line and an extrusion device for producing a BV line. It has the following beneficial effects: 1. The present invention forms two protective films by first coating a PE material layer on the surface of the copper wire, and then coating a PVC material layer on the surface of the PE material layer. From the inside to the outside, there are copper wire, PE layer, and PVC layer, and the thickness of the PE layer and the PVC layer added together is equal to the thickness of the PVC layer wrapped around the original copper wire, that is, the thickness of the overall insulating layer remains unchanged, the PE layer has good insulation, and is moisture-proof and wear-resistant, so that the BV is not easy to cause static electricity leakage, the insulation of the BV line is improved, and it is not easy to short-circuit.

[0021] 2. The present invention wipes the surface of the copper wire by the wiping cotton block pushed out by the inner top column, so that impurities or dust on the surface of the copper wire are cleaned, making the subsequent PE insulation layer more uniform and dense, reducing the insulation resistance, improving the insulation reliability, and reducing the probability of safety accidents such as leakage and short circuit.

[0022] 3. The present invention drives the sliding column to move by pulling the pulling block outward, thereby driving the sliding block and the inner top column to move, and then pulling the wiping soft cotton block upward to take it out for flipping and assembling it or assembling a new one, which makes it easy to replace the wiping soft cotton block, reduces downtime, and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A perspective view of the present invention; Figure 2 It is a schematic diagram of the local structure of the limiting bracket of the present invention; Figure 3 It is a schematic diagram of the local structure of the fixed frame of the present invention; Figure 4 It is a cross-sectional schematic diagram of the internal structure of the heat dissipation frame of the present invention; Figure 5 It is a schematic diagram of the local structure of the L-shaped bracket of the present invention; Figure 6 It is a schematic cross-sectional view of the internal structure of the housing of the present invention; Figure 7 It is a schematic diagram of the local structure of the inner top column of the present invention.

[0024] Among them, 1. support frame; 2. fixed frame; 3. mold; 4. copper wire; 5. heat dissipation frame; 6. electric push rod; 7. PVC storage box; 8. discharge head; 9. feed port; 10. PE injection assembly; 11. limit bracket; 12. L-shaped bracket; 13. outer shell; 14. sliding column; 15. pulling block; 16. sliding block; 17. first chamber; 18. second chamber; 19. tension spring; 20. inner top column; 21. wiping cotton block. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Please see attached Figure 1 - Attachment Figure 4 The embodiment of the present invention provides an extrusion device for producing BV line, including a support frame 1, a fixed frame 2 is fixedly connected to the middle of the outer wall of the support frame 1, a mold 3 is arranged on the inner wall of the fixed frame 2, a copper wire 4 is arranged inside the mold 3, a heat dissipation frame 5 is fixedly connected to the upper part of the outer wall of the support frame 1, an electric push rod 6 is arranged inside the heat dissipation frame 5, the output end of the electric push rod 6 is fixedly connected to the outer wall of a PVC storage box 7, a discharge head 8 is fixedly connected to the lower surface of the PVC storage box 7, a feed port 9 is fixedly connected to the outer wall of the mold 3, a PE injection assembly 10 is arranged on the outer wall of the feed port 9, the PE injection assembly 10 is connected to the fixed frame 2 by bolts, and a support assembly is arranged at the lower part of the outer wall of the support frame 1, and the support assembly is used to support the remaining parts.

[0027] Specifically, after the copper wire 4 passes through the fixed frame 2 and the mold 3, the PE injection component 10 is first started. The PE injection component 10 injects the internal molten PE material into the channel inside the mold 3 through the feed port 9, so that the outer wall of the copper wire 4 is first covered with a layer of PE material, and then the molten PVC material inside the PVC storage box 7 is pushed into the internal channel of the mold 3 through the discharge head 8 by the electric push rod 6, so that the PVC material is coated on the outer wall of the PE layer material to form two layers of protective film, which are the copper wire 4, the PE layer, and the PVC layer from the inside to the outside, and the combined thickness of the PE layer and the PVC layer is equal to the thickness of the PVC layer wrapped around the original copper wire 4, that is, the thickness of the overall insulating layer remains unchanged, the PE layer has good insulation, and is moisture-proof and wear-resistant, so that the improved BV is not prone to static leakage, the insulation of the BV line is improved, and it is not prone to short circuit.

[0028] Please see attached Figure 1 , Attachment Figure 2 and attached Figure 5 The support assembly includes a limiting bracket 11, the outer wall of the limiting bracket 11 is fixedly connected to the lower part of the outer wall of the support frame 1, and the outer wall of the limiting bracket 11 is fixedly connected to an L-shaped bracket 12.

[0029] Specifically, the limiting bracket 11 is fixed to the outer wall of the supporting frame 1 to support the L-shaped bracket 12 , thereby providing effective support for the subsequent wiping of the copper wire 4 .

[0030] Please see attached Figure 3The interior of the mold 3 is designed with a T-shaped three-way structure, and the feed port 9 and the discharge head 8 are staggered, and the feed port 9 is close to the left side.

[0031] Specifically, a T-shaped three-way structure is provided inside the mold 3, so that the copper wire 4 can be added with PE material and PVC material while passing through the fixed frame 2 and the mold 3, and the PE material is arranged in the front and the PVC material is arranged in the back.

[0032] Please see attached Figure 1 - Attachment Figure 3 , the copper wire 4 passes through the fixed frame 2 and the mold 3 from left to right.

[0033] Specifically, the copper wire 4 passes through the fixed frame 2 and the mold 3 from left to right to facilitate the PE material and the PVC material to be coated on the surface of the copper wire 4.

[0034] Please see attached Figure 5 - Attachment Figure 7 The outer wall of the L-shaped bracket 12 is fixedly connected to the outer shell 13 on both sides, and the inner part of the outer shell 13 is slidably connected to a sliding column 14, one end of the sliding column 14 is fixedly connected to a pulling block 15, and the other end of the sliding column 14 is fixedly connected to a sliding block 16, and the outer wall of the sliding block 16 is slidably connected to the inner part of the outer shell 13, and the outer wall of the sliding column 14 is fixedly connected to a tension spring 19, and the outer wall of the sliding block 16 is fixedly connected to an inner top column 20, and the outer wall of the inner top column 20 is fitted with a wiping soft cotton block 21, and the outer wall of the wiping soft cotton block 21 is slidably connected to the inner part of the outer shell 13.

[0035] Specifically, the pulling block 15 is pulled to drive the sliding block 16 and the inner top column 20 to move, so that the wiping soft cotton block 21 is no longer deformed by the thrust of the inner top column 20, the wiping soft cotton block 21 is taken out and turned over or a new one is assembled, and then the pulling block 15 is released, and the sliding block 16 and the inner top column 20 are reset by the pulling force of the tension spring 19, so that the wiping soft cotton block 21 wipes the surface of the copper wire 4, which makes it convenient to replace the copper wire 4, reduces downtime, and improves work efficiency.

[0036] Please see attached Figure 6 A first chamber 17 is defined inside the housing 13 , and an outer wall of the sliding block 16 is slidably connected to an inner wall of the housing 13 .

[0037] Specifically, the first chamber 17 is used to limit the direction and position of the sliding block 16 and fix the wiping soft cotton block 21, thereby preventing the wiping soft cotton block 21 from escaping from the inside of the housing 13 and preventing the sliding block 16 from changing its moving position and causing the whole to get stuck.

[0038] Please see attached Figure 6A second chamber 18 is provided inside the housing 13 on one side close to the pulling block 15 , and the outer wall of the tension spring 19 is fixedly connected to the inner wall of the second chamber 18 .

[0039] Specifically, the second chamber 18 is used to install the tension spring 19, so that one end of the tension spring 19 is connected to the sliding block 16, and the other end is connected to the inner wall of the second chamber 18, so that the tension spring 19 has space to be stretched and can limit the position of the tension spring 19.

[0040] Please see attached Figure 6 and attached Figure 7 The wiping soft cotton block 21 is deformed by the force of the inner top column 20 to fit the surface of the copper wire 4 and will not fall off from the inside of the shell 13.

[0041] Specifically, the wiping cotton block 21 is deformed by the thrust of the inner top column 20, and the middle part protrudes outward and contacts the surface of the copper wire 4. Since a card groove is provided inside the outer shell 13, and the sliding block 16 exerts a clamping force on the wiping cotton block 21, the wiping cotton block 21 will not separate from the inner part of the outer shell 13, and the impurities or dust on the surface of the copper wire 4 will be intercepted and processed, so that the subsequent PE insulation layer is more uniform and dense, the insulation resistance is reduced, the insulation reliability is improved, and the probability of safety accidents such as leakage and short circuit is reduced.

[0042] Please see attached Figure 1 and attached Figure 2 The copper wire 4 is located in the middle of the two side shells 13, and the reserved seams of the two side shells 13 and the position where the copper wire 4 passes through the fixed frame 2 and the mold 3 are in the same horizontal plane.

[0043] Specifically, the gap reserved in the middle of the shell 13 allows the copper wire 4 to pass through the fixed frame 2 and the mold 3 without contacting the inner walls of the fixed frame 2 and the mold 3, thereby preventing the PE layer or the PVC layer from being scratched, resulting in poor effect.

[0044] A BV wire comprises a copper wire 4, a PE material layer and a PVC material layer. The PE material layer covers the surface of the copper wire 4, and the PVC material layer covers the surface of the PE material layer.

[0045] Specifically, the PE material layer has good insulation and is moisture-proof and wear-resistant, and the PVC material layer is evenly extruded and wrapped around the copper wire to form an insulating layer.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An extrusion device for producing a BV line, comprising a support frame (1), characterized in that: A fixed frame (2) is fixedly connected to the middle of the outer wall of the support frame (1), a mold (3) is provided on the inner wall of the fixed frame (2), a copper wire (4) is provided inside the mold (3), a heat dissipation frame (5) is fixedly connected to the upper part of the outer wall of the support frame (1), an electric push rod (6) is provided inside the heat dissipation frame (5), an output end of the electric push rod (6) is fixedly connected to the outer wall of the PVC storage box (7), a discharge head (8) is fixedly connected to the lower surface of the PVC storage box (7), a feed port (9) is fixedly connected to the outer wall of the mold (3), a PE injection assembly (10) is provided on the outer wall of the feed port (9), the PE injection assembly (10) is connected to the fixed frame (2) by bolts, and a support assembly is provided at the lower part of the outer wall of the support frame (1), the support assembly is used to support the remaining parts.

2. The extrusion equipment for producing a BV line according to claim 1, characterized in that: The support assembly comprises a limiting bracket (11), the outer wall of the limiting bracket (11) being fixedly connected to the lower part of the outer wall of the support frame (1), and the outer wall of the limiting bracket (11) being fixedly connected to an L-shaped bracket (12).

3. The extrusion equipment for producing a BV line according to claim 1, characterized in that: The interior of the mold (3) is designed with a T-shaped three-way structure, the feed port (9) and the discharge head (8) are arranged in a staggered manner, and the feed port (9) is close to the left side.

4. The extrusion equipment for producing a BV line according to claim 1, characterized in that: The copper wire (4) passes through the fixed frame (2) and the mold (3) from left to right.

5. The extrusion equipment for producing a BV line according to claim 2, characterized in that: Both sides of the outer wall of the L-shaped bracket (12) are fixedly connected to the outer shell (13), the inner part of the outer shell (13) is slidably connected to a sliding column (14), one end of the sliding column (14) is fixedly connected to a pulling block (15), the other end of the sliding column (14) is fixedly connected to a sliding block (16), the outer wall of the sliding block (16) is slidably connected to the inner part of the outer shell (13), the outer wall of the sliding column (14) is fixedly connected to a tension spring (19), the outer wall of the sliding block (16) is fixedly connected to an inner top column (20), the outer wall of the inner top column (20) is fitted with a wiping soft cotton block (21), and the outer wall of the wiping soft cotton block (21) is slidably connected to the inner part of the outer shell (13).

6. The extrusion equipment for producing a BV line according to claim 5, characterized in that: A first chamber (17) is provided inside the outer shell (13), and an outer wall of the sliding block (16) is slidably connected to an inner wall of the outer shell (13).

7. The extrusion equipment for producing a BV line according to claim 5, characterized in that: A second chamber (18) is provided inside the housing (13) on a side close to the pulling block (15), and the outer wall of the tension spring (19) is fixedly connected to the inner wall of the second chamber (18).

8. The extrusion equipment for producing a BV line according to claim 5, characterized in that: The wiping soft cotton block (21) is deformed by the force of the inner top column (20) to fit the surface of the copper wire (4) and will not fall off from the inside of the outer shell (13).

9. The extrusion equipment for producing a BV line according to claim 5, characterized in that: The copper wire (4) is located in the middle of the two side shells (13), and the seams reserved in the two side shells (13) are in the same horizontal plane as the position where the copper wire (4) penetrates the fixed frame (2) and the mold (3).

10. A BV line, characterized in that: An extrusion device for producing a BV wire as described in any one of claims 1 to 9, wherein the BV wire comprises a copper wire (4), a PE material layer, and a PVC material layer, wherein the PE material layer covers the surface of the copper wire (4), and the PVC material layer covers the surface of the PE material layer.

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