Cable insulation layer extrusion coating device and coating method

Abstract

The present invention provides a cable insulation layer extrusion coating device and a coating method thereof, comprising an extruder, wherein the output end of the extruder is connected to a coating die, and further comprising a cooling pool, wherein a plurality of water spraying components are arranged inside the cooling pool, and the water spraying components include a tubular body, an annular rotating nozzle is arranged inside the tubular body, and a spiral component is arranged inside the rotating nozzle. According to the present invention, after water is passed into the water injection chamber, the water will be sprayed onto the coated cable surface through the annular rotating nozzle, and the sprayed water will converge into the annular rotating nozzle. The spiral component will drive the water in the annular rotating nozzle in a spiral manner under the drive of the annular rotating nozzle, so that the water can be spirally driven on the coated cable surface, making the flow direction of the water changeable, so that the water can evenly cover the surface of the cable, which is beneficial to avoid local overtemperature or cooling blind spots, and under the spiral drive of the spiral component, it is beneficial to increase the flow speed of the water.

Description

Technical Field

[0001] The invention belongs to the field of cable insulation layer production, and in particular relates to a cable insulation layer extrusion coating device and a coating method thereof. Background Art

[0002] The cable sheath can serve as insulation protection. During production, molten plastic is extruded and coated on the surface of the copper wire through an injection molding extruder. After the molten plastic cools and hardens, it forms the cable sheath.

[0003] After the cable is covered with the outer sheath, it needs to be water-cooled and formed. In the existing water-cooling pool, the cable is immersed in flowing water to cool the cable surface. However, during the cooling process, the water flow rate is limited and the flow direction is single. Summary of the Invention

[0004] In view of this, the present invention aims to propose a cable insulation layer extrusion coating device to solve the problem that in the existing water cooling pool, the cable is immersed in flowing water to cool the cable surface, and during the cooling process, the water flow rate is limited and the flow direction is single.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] A cable insulation layer extrusion coating device includes an extruder, the output end of the extruder is connected to a coating mold, and also includes a cooling pool. The cooling pool is located on the outlet side of the coating mold. A plurality of water spray components are arranged inside the cooling pool. The water spray component includes a tubular body, an annular rotating nozzle is arranged in the tubular body, and a water injection cavity is formed between the annular rotating nozzle and the tubular body. A spiral component is arranged in the annular rotating nozzle, and the spiral component is used to spirally drive the water sprayed from the annular rotating nozzle under the drive of the annular rotating nozzle.

[0007] Preferably, the tubular body includes two arc-shaped water injection bodies, which form a tube when combined. The side walls of the two arc-shaped water injection bodies are fixedly connected to a support frame, and a cylinder is fixedly installed between the support frame and the cooling pool. A water injection pipe is connected to the surface of one of the arc-shaped water injection bodies, and the water injection pipe includes a first pipe, a second pipe and a telescopic pipe. The first pipe is fixedly connected to the surface of one of the arc-shaped water injection bodies, and the second pipe passes through the cooling pool and extends to the outside of the cooling pool. The two ends of the telescopic pipe are respectively fixedly connected to the first pipe and the second pipe.

[0008] Preferably, the annular rotating sprinkler includes two arc-shaped plates, the two arc-shaped plates are respectively arranged inside the two arc-shaped water injection bodies, and the arc-shaped plates and the arc-shaped water injection bodies are connected by two arc-shaped slide rails, and an arc-shaped water injection cavity is formed between the two arc-shaped slide rails, the arc-shaped plates and the arc-shaped water injection bodies. The two arc-shaped plates are butted together to form an annular body under the support of the arc-shaped water injection bodies, and water spraying ports are provided at the upper and lower ends of the surfaces of the two arc-shaped plates, and the direction of the water spraying ports is aligned with the arc center of the arc trajectory of the arc-shaped plates;

[0009] A rotary drive assembly is provided at the end of the annular rotary sprinkler head, and the rotary drive assembly is used to drive the two arc-shaped plates to rotate between the two arc-shaped water injection bodies.

[0010] Preferably, the rotary drive assembly includes two arc-shaped racks and two motors, the two arc-shaped racks are respectively fixedly connected to the ends of the two arc-shaped plates, and the two arc-shaped racks are connected to form an annular rack. The two motors are respectively fixedly connected to the ends of the two support frames, and the output ends of the two motors are fixedly connected with gears, and the two gears are respectively engaged with the two arc-shaped racks.

[0011] Preferably, the spiral assembly includes a first spiral and a second spiral, the first spiral and the second spiral are respectively fixedly connected to the inner arc surfaces of the two arc plates, and the first spiral and the second spiral form a complete spiral leaf after being docked.

[0012] Preferably, it further comprises a water tank, which is arranged between the cooling tank and the coating mold.

[0013] Preferably, the bottom end of the water storage tank close to the cooling tank is fixedly connected to a first water pump, the water outlet end of the first water pump is connected to a pumping pipe, and the pumping pipe is fixedly connected to multiple second pipes.

[0014] Preferably, the pumping pipe includes a first section, a second section and a third section, the first section is connected to the water outlet of the first water pump, the third section is connected to multiple second pipes, and the second section is fixedly connected between the first section and the third section.

[0015] Preferably, a temperature sensor is fixedly installed on the first section, and the detection end of the temperature sensor is inserted into the interior of the first section. A first external pipe is fixedly connected to the surface of the second section, and an electromagnetic valve is installed on the first external pipe. A second water pump is also fixedly connected to the surface of the water tank, and the output end of the second water pump is fixedly connected to the second external pipe.

[0016] In a second aspect, a cable insulation layer extrusion coating device is provided, comprising the following steps:

[0017] Step 1: Installation: The cable passes through the coating mold, the annular rotating nozzle and then the cooling pool;

[0018] Step 2: Coating: The cable passes through the coating die, and the extruder injects the plastic fluid into the coating die, covering the cable surface with the plastic fluid;

[0019] Step 3: Cooling treatment: After water is passed into the water injection chamber, the water will be sprayed onto the surface of the coated cable through the annular rotating nozzle. The sprayed water will converge into the annular rotating nozzle. The spiral component will drive the water in the annular rotating nozzle in a spiral manner under the drive of the annular rotating nozzle, so that the water can be spirally driven on the surface of the coated cable, so that the water can evenly cover the surface of the cable.

[0020] Compared with the prior art, the cable insulation layer extrusion coating equipment described in the present invention has the following advantages:

[0021] (1) According to the present invention, after water is passed into the water injection chamber, the water will be sprayed onto the surface of the coated cable through the annular rotating nozzle, and the sprayed water will converge into the annular rotating nozzle. The spiral component will drive the water in the annular rotating nozzle in a spiral manner under the drive of the annular rotating nozzle, so that the water can be spirally driven on the surface of the coated cable, making the flow direction of the water changeable and the water can evenly cover the surface of the cable, which is beneficial to avoid local overtemperature or cooling blind spots, and under the spiral drive of the spiral component, it is beneficial to increase the flow speed of the water.

[0022] (2) When the annular rotating sprinkler head needs to be maintained, the two cylinders are first started, and the two cylinders pull the two support frames, and the two support frames simultaneously drive the two arc-shaped water injection bodies to move away from each other and open, so as to facilitate the maintenance of the annular rotating sprinkler head.

[0023] By starting the two motors, the two motors synchronously drive the two gears to rotate in the same direction, and then the two gears synchronously drive the annular rack, the annular rack drives the two arc-shaped plates to rotate, and the annular rotating sprinkler formed by the two arc-shaped plates rotates under the drive of the annular rack, thereby achieving the function of driving the annular rotating sprinkler to rotate. When the motor stops driving the rotation, the motor can brake, and then the output shaft of the motor supports the gears, the two gears support the two arc-shaped racks, and the two arc-shaped racks support the two arc-shaped plates. When the two arc-shaped water injection bodies are separated, the arc-shaped plates can maintain relative stability with the arc-shaped water injection bodies.

[0024] During the docking of the two arc-shaped water injection bodies, the two arc-shaped water injection bodies will drive the two arc plates to dock. During the docking of the two arc plates, the first spiral body and the second spiral body are docked. The first spiral body and the second spiral body are docked to form spiral leaves. During the rotation of the annular rotating nozzle, the water spiral gathered on the inner side of the annular rotating nozzle will be pushed, so that the water is evenly coated on the surface of the cable, which is beneficial to uniform contact with the cable surface. The swirling water can take away the bubbles generated on the cable surface, which is beneficial to avoid bubbles hindering the contact between water and the cable surface.

[0025] When the temperature sensor detects that the temperature of the water pumped by the first water pump is higher than the upper limit temperature value, the external controller is requested to control the first water pump to stop pumping, and control the electromagnetic valve to open and start the second water pump. The prepared water outside the first external pipe will flow into the second section for water supply to ensure that the water temperature is below the upper limit temperature value. The second water pump will pump out the water in the pumping chamber to maintain the stability of the water level inside the water storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 This is a flow chart of a method for extrusion coating equipment for cable insulation layers according to an embodiment of the present invention;

[0028] Figure 2 This is a first overall structural schematic diagram of a cable insulation layer extrusion coating device according to an embodiment of the present invention;

[0029] Figure 3 for Figure 2 Enlarged view of part A;

[0030] Figure 4 This is a first structural schematic diagram of a tubular body and an annular rotating nozzle of a cable insulation layer extrusion coating device according to an embodiment of the present invention;

[0031] Figure 5 This is a second structural schematic diagram of a tubular body and an annular rotating nozzle of a cable insulation layer extrusion coating device according to an embodiment of the present invention;

[0032] Figure 6 This is a partial structural schematic diagram of a water spray assembly of a cable insulation layer extrusion coating device according to an embodiment of the present invention;

[0033] Figure 7 This is a first structural schematic diagram of an annular rotary nozzle of a cable insulation layer extrusion coating device according to an embodiment of the present invention;

[0034] Figure 8 This is a second structural schematic diagram of an annular rotary nozzle of a cable insulation layer extrusion coating device according to an embodiment of the present invention;

[0035] Figure 9 This is a second overall structural schematic diagram of a cable insulation layer extrusion coating device according to an embodiment of the present invention;

[0036] Figure 10 for Figure 9 Enlarged view of part B;

[0037] Figure 11 A top view of a cooling pool of a cable insulation layer extrusion coating device according to an embodiment of the present invention;

[0038] Figure 12 for Figure 11 Enlarged view of part C in the middle;

[0039] Figure 13 This is a structural schematic diagram of a diverter plate and an arc-shaped water receiving plate of a cable insulation layer extrusion coating device according to an embodiment of the present invention.

[0040] Description of reference numerals:

[0041] 1-extruder; 2-coating die; 3-tubular body; 301-arc-shaped water injection body; 4-annular rotating nozzle; 401-arc-shaped plate; 402-water nozzle; 403-arc-shaped partition; 5-support frame; 6-cylinder; 7-arc-shaped water injection chamber; 8-water injection pipe; 801-first pipe; 802-second pipe; 803-telescopic pipe; 9-arc-shaped rack; 10-motor; 11-gear; 12-spiral blade; 1201-first spiral; 1202-second spiral; 13-water storage Pool; 14-first water pump; 15-pumping pipe; 1501-first section; 1502-second section; 1503-third section; 16-temperature sensor; 17-first external pipe; 18-solenoid valve; 19-second water pump; 20-second external pipe; 21-filter plate; 22-water receiving chamber; 23-pumping chamber; 24-diverter plate; 25-arc-shaped water receiving plate; 26-arc-shaped groove rail; 27-arc-shaped slider; 28-guide wheel; 29-cooling pool; 30-drainage bucket; 31-controller. DETAILED DESCRIPTION

[0042] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0044] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0045] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0046] like Figures 2 to 12 As shown, in one embodiment, a cable insulation layer extrusion coating device includes an extruder 1, the output end of the extruder 1 is connected to the coating mold 2, and also includes a cooling pool 29, the cooling pool 29 is located on the outlet side of the coating mold 2, and a plurality of water spray components are arranged inside the cooling pool 29, the water spray component includes a tubular body 3, an annular rotating nozzle 4 is arranged in the tubular body 3, a water injection cavity is formed between the annular rotating nozzle 4 and the tubular body 3, a spiral component is arranged in the rotating nozzle, and the spiral component is used to spirally drive the water sprayed from the annular rotating nozzle 4 under the drive of the annular rotating nozzle 4.

[0047] like Figure 1 As shown, under the implementation of the cable insulation layer extrusion coating equipment, the cable insulation layer extrusion coating method includes the following steps:

[0048] Step 1: Installation: The cable passes through the coating mold 2, the annular rotating nozzle 4 and then the cooling pool 29;

[0049] Step 2: Coating: The cable passes through the coating die 2. The extruder 1 injects the plastic fluid into the coating die 2, covering the cable surface with the plastic fluid.

[0050] Step 3, cooling treatment: After water is passed into the water injection chamber, the water will be sprayed onto the surface of the coated cable through the annular rotating nozzle 4, and the sprayed water will converge into the annular rotating nozzle 4. The spiral component will be driven by the annular rotating nozzle 4 to spirally drive the water in the annular rotating nozzle 4, so that the water can be spirally driven on the surface of the coated cable, so that the water can evenly cover the surface of the cable.

[0051] Specifically, a through groove for passing the cooled cable is opened at one end of the cooling pool 29 away from the coating mold 2, and a guide wheel 28 is fixedly installed at the other end of the cooling pool 29 away from the coating mold 2, and the top of the guide wheel 28 supports the bottom end of the cooled cable.

[0052] It should be understood that when the cable passes through the coating die 2, the extruder 1 injects the plastic fluid into the coating die 2, covering the surface of the cable with the plastic fluid. Then, the coated cable passes through the cooling pool 29 under the pull of the winding mechanism, and is cooled by the water spray assembly, thereby achieving cooling and molding of the coated cable.

[0053] After water is passed into the water injection chamber, the water will be sprayed onto the surface of the coated cable through the annular rotating nozzle 4. The sprayed water will converge into the annular rotating nozzle 4. Driven by the annular rotating nozzle 4, the spiral component will drive the water in the annular rotating nozzle 4 in a spiral manner, so that the water can be spirally driven on the surface of the coated cable, making the flow direction of the water changeable and evenly covering the surface of the cable, which is beneficial to avoid local overheating or cooling blind spots. In addition, the spiral drive of the spiral component is beneficial to increase the flow speed of the water.

[0054] The tubular body 3 includes two arc-shaped water injection bodies 301, which form a tube when the two arc-shaped water injection bodies 301 are merged. The side walls of the two arc-shaped water injection bodies 301 are fixedly connected to a support frame 5, and a cylinder 6 is fixedly installed between the support frame 5 and the cooling pool 29. A water injection pipe 8 is connected to the surface of one of the arc-shaped water injection bodies 301. The water injection pipe 8 includes a first pipe 801, a second pipe 802 and a telescopic pipe 803. The first pipe 801 is fixedly connected to the surface of one of the arc-shaped water injection bodies 301, and the second pipe 802 passes through the cooling pool 29 and extends to the outside of the cooling pool 29. The two ends of the telescopic pipe 803 are fixedly connected to the first pipe 801 and the second pipe 802 respectively.

[0055] It should be understood that when the annular rotating sprinkler 4 needs to be maintained, the two cylinders 6 are started first, and the two cylinders 6 pull the two support frames 5, and the two support frames 5 simultaneously drive the two arc-shaped water injection bodies 301 to open away from each other, making it convenient to maintain the annular rotating sprinkler 4.

[0056] By providing the telescopic tube 803 , the water injection pipe 8 is provided with the degree of freedom of deformation when the two arc-shaped water injection bodies 301 move, thereby avoiding the problem of hindering the movement of the arc-shaped water injection bodies 301 .

[0057] The water injection cavity is formed by connecting two arc-shaped water injection cavities 7.

[0058] The annular rotating sprinkler 4 includes two curved plates 401, which are respectively arranged on the inner sides of the two curved water injection bodies 301, and the curved plates 401 are connected to the curved water injection chamber 7 by two curved slide rails. The two curved slide rails, the curved plates and the curved water injection body 301 form an arc-shaped water injection chamber 7. The two curved plates 401 are butt-jointed to form an annular body under the support of the curved water injection body 301. Water spray outlets 402 are provided at the upper and lower ends of the surfaces of the two curved plates 401. The direction of the water spray outlets 402 is aligned with the arc center of the arc trajectory of the curved plates 401.

[0059] It should be understood that the annular rotating nozzle 4 is composed of two arc-shaped plates 401. When the two arc-shaped water injection bodies 301 are separated from each other, the two arc-shaped plates 401 can be synchronously driven to separate to form a space for the cable to pass through.

[0060] A rotary drive assembly is provided at the end of the annular rotary sprinkler 4 , and the rotary drive assembly is used to drive the two arc-shaped plates 401 to rotate between the two arc-shaped water injection bodies 301 .

[0061] The rotary drive assembly includes two arc-shaped racks 9 and two motors 10. The two arc-shaped racks 9 are respectively fixedly connected to the ends of the two arc-shaped plates 401. The two arc-shaped racks 9 form an annular rack after being docked. The two motors 10 are respectively fixedly connected to the ends of the two support frames 5. The output ends of the two motors 10 are fixedly connected to gears 11, and the two gears 11 are respectively engaged with the two arc-shaped racks 9.

[0062] It should be understood that during the cooling process, the water injected into the water injection cavity will be ejected through the water injection port 402 and injected toward the cable surface. The water will gather on the cable surface and cool the injection molded layer covering the cable surface.

[0063] By starting the two motors 10, the two motors 10 synchronously drive the two gears 11 to rotate in the same direction, and then the two gears 11 synchronously drive the annular rack, and the annular rack drives the two arc plates 401 to rotate. The annular rotating nozzle 4 formed by the two arc plates 401 rotates under the drive of the annular rack, thereby achieving the effect of driving the annular rotating nozzle 4 to rotate.

[0064] When the motor 10 stops driving the rotation, the motor 10 can brake, and then the output shaft of the motor 10 supports the gear 11, the two gears 11 support the two arc-shaped racks 9, and the two arc-shaped racks 9 support the two arc-shaped plates 401. When the two arc-shaped water injection bodies 301 are separated, the arc-shaped plates 401 can maintain relative stability with the arc-shaped water injection bodies 301.

[0065] Specifically, the arc track includes an arc groove rail 26, an arc slider 27 is slidably provided in the arc groove rail 26, the arc groove rail 26 is fixedly connected to the outer arc surface of the arc plate 401, and the arc slider 27 is fixedly connected to the inner surface of the arc water injection body 301;

[0066] like Figure 7 and Figure 8 As shown, in one embodiment, the spiral assembly includes a first spiral body 1201 and a second spiral body 1202, and the first spiral body 1201 and the second spiral body 1202 are respectively fixedly connected to the inner arc surfaces of the two arc plates 401, and the first spiral body 1201 and the second spiral body 1202 are connected to form a complete spiral leaf 12.

[0067] Specifically, one end of the two arc plates 401 close to the arc rack 9 is fixedly connected with an arc partition 403. The two arc partitions 403 are connected to form a water-isolating ring. After the water is sprayed into the inside of the annular rotating nozzle 4, the water-isolating ring blocks the water, reducing the water from flowing directly out of the end of the annular rotating nozzle 4 close to the arc rack 9, so that the water is driven by the spiral component to flow toward the first end a of the annular rotating nozzle 4.

[0068] It should be understood that during the docking process of the two arc-shaped water injection bodies 301, the two arc-shaped water injection bodies 301 will drive the two arc-shaped plates 401 to dock. During the docking process of the two arc-shaped plates 401, the first spiral 1201 and the second spiral 1202 are docked. The first spiral 1201 and the second spiral 1202 are docked to form spiral leaves 12. During the rotation of the annular rotating nozzle 4, the water gathered on the inner side of the annular rotating nozzle 4 will be spirally pushed, so that the water is evenly coated on the surface of the cable, which is beneficial to uniform contact with the cable surface, and the swirling water can take away the bubbles generated on the cable surface, which is beneficial to avoid bubbles hindering the contact between water and the cable surface.

[0069] The water spray port 402 is located inside the spiral cavity of the spiral blade 12 and inside the spiral channel of the spiral blade 12 , which is conducive to evenly injecting water into the inner side of the annular rotating nozzle 4 .

[0070] like Figure 2 、 Figure 3 、 Figure 9 and Figure 10As shown, in one embodiment, a water reservoir 13 is further included, and the water reservoir 13 is arranged between the cooling pool 29 and the coating mold 2;

[0071] The bottom end of the water storage tank 13 near the cooling tank 29 is fixedly connected to a first water pump 14 , and the water outlet of the first water pump 14 is connected to a pumping pipe 15 , which is fixedly connected to the plurality of second pipes 802 .

[0072] Specifically, the tail end of the cooling pool 29 is fixedly installed with a drainage bucket 30 to drain the water flowing out of the cooling pool 29 into the water storage tank 13.

[0073] It should be understood that during the cooling process, the water in the cooling pool 29 will fall into the water storage pool 13 after the outlet. In the process of falling from the cooling pool 29 to the water storage pool 13, the water can come into contact with the air to achieve cooling.

[0074] The first water pump 14 can pump the water in the water tank 13 to the pumping pipe 15, and the pumping pipe 15 injects the water into the water injection pipe 8. The water injection pipe 8 diverts the water into the water injection cavity. The water is gathered into the annular rotating nozzle 4 through the water nozzle 402 to cool the coated cable.

[0075] like Figure 1 and Figure 2 As shown, in one embodiment, the pumping pipe 15 includes a first section 1501, a second section 1502 and a third section 1503, the first section 1501 is connected to the water outlet of the first water pump 14, the third section 1503 is connected to multiple second pipes 802, and the second section 1502 is fixedly connected between the first section 1501 and the third section 1503.

[0076] A temperature sensor 16 is fixedly installed on the first section 1501, and the detection end of the temperature sensor 16 is inserted into the interior of the first section 1501. A first external pipe 17 is fixedly connected to the surface of the second section 1502, and an electromagnetic valve 18 is installed on the first external pipe 17. A second water pump 19 is also fixedly connected to the surface of the water tank 13, and the output end of the second water pump 19 is fixedly connected to the second external pipe 20.

[0077] Specifically, a filter plate 21 is fixedly connected to the inner wall of the water tank 13 , and the filter plate 21 divides the water tank 13 into a water receiving chamber 22 and a pumping chamber 23 . The first water pump 14 and the second water pump 19 are both connected to the pumping chamber 23 .

[0078] When the temperature sensor 16 detects that the temperature of the water pumped by the first water pump 14 is higher than the upper limit temperature value, the external controller 31 is requested to control the first water pump 14 to stop pumping, and control the electromagnetic valve 18 to open and start the second water pump 19. The prepared water connected to the first external pipe 17 will be passed into the second section 1502 for water supply to ensure that the water temperature is below the upper limit temperature value. The second water pump 19 will pump out the water in the pumping chamber 23 to maintain the stability of the water level inside the water storage tank 13.

[0079] like Figure 9 As shown, specifically, the controller 31 can be installed on the surface of the cooling pool 29 .

[0080] like Figures 11 to 13 As shown, specifically, two inclined diverter plates 24 are fixedly connected to the bottom of the cooling pool 29. The two diverter plates 24 are symmetrically arranged, and a curved water receiving plate 25 is fixedly connected to the top of the two diverter plates 24. The curved water receiving plate 25 is a mesh plate with mesh. Water passing through the annular rotating nozzle 4 will fall onto the curved water receiving plate 25. Part of the water will pass through the filter plate 21 and fall to the bottom of the cooling pool 29. The other part of the water will overflow the curved water receiving plate 25 and flow along the diverter plates 24 to the two sides of the bottom of the cooling pool 29. The water is divided into three flows, which facilitates the contact between water and air and helps to dissipate heat from the water.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cable insulation layer extrusion coating device, comprising an extruder (1), wherein the output end of the extruder (1) is connected to a coating die (2), characterized in that: It also includes a cooling pool (29), the cooling pool (29) is located on the outlet side of the coating mold (2), and a plurality of water spray components are arranged inside the cooling pool (29), the water spray components include a tubular body (3), an annular rotating nozzle (4) is arranged inside the tubular body (3), a water injection cavity is formed between the annular rotating nozzle (4) and the tubular body (3), a spiral component is arranged inside the annular rotating nozzle (4), and the spiral component is used to spirally drive the water sprayed by the annular rotating nozzle (4) under the drive of the annular rotating nozzle (4); The tubular body (3) comprises two arc-shaped water injection bodies (301), which form a tubular shape when the two arc-shaped water injection bodies (301) are combined, and the side walls of the two arc-shaped water injection bodies (301) are fixedly connected to a support frame (5), and a cylinder (6) is fixedly installed between the support frame (5) and the cooling pool (29), and a water injection pipe (8) is connected to the surface of one of the arc-shaped water injection bodies (301); The annular rotating nozzle (4) comprises two arc-shaped plates (401), the two arc-shaped plates (401) are respectively arranged on the inner sides of the two arc-shaped water injection bodies (301), and the arc-shaped plates (401) and the arc-shaped water injection bodies (301) are connected via two arc-shaped slide rails, and an arc-shaped water injection cavity (7) is formed between the two arc-shaped slide rails, the arc-shaped plates and the arc-shaped water injection bodies (301). The two arc-shaped plates (401) are butted together to form an annular body under the support of the arc-shaped water injection bodies (301). Water spraying ports (402) are provided at the upper and lower ends of the surface of the arc-shaped plate (401), and a rotary drive assembly is provided at the end of the annular rotary nozzle (4), and the rotary drive assembly is used to drive the two arc-shaped plates (401) to rotate between the two arc-shaped water injection bodies (301); the spiral assembly includes a first spiral body (1201) and a second spiral body (1202), and the first spiral body (1201) and the second spiral body (1202) are respectively fixedly connected to the inner arc-shaped surfaces of the two arc-shaped plates (401).

2. The cable insulation layer extrusion coating device according to claim 1, characterized in that: The water injection pipe (8) comprises a first pipe (801), a second pipe (802) and a telescopic pipe (803), wherein the first pipe (801) is fixedly connected to the surface of one of the arc-shaped water injection bodies (301), and the second pipe (802) passes through the cooling pool (29) and extends to the outside of the cooling pool (29), and the two ends of the telescopic pipe (803) are fixedly connected to the first pipe (801) and the second pipe (802), respectively.

3. The cable insulation layer extrusion coating device according to claim 2, characterized in that: The water spray port (402) is directed toward the center of the arc trajectory of the arc plate (401).

4. The cable insulation layer extrusion coating device according to claim 3, characterized in that: The rotary drive assembly comprises two arc-shaped racks (9) and two motors (10), the two arc-shaped racks (9) are respectively fixedly connected to the ends of the two arc-shaped plates (401), and the two arc-shaped racks (9) are connected to form an annular rack, the two motors (10) are respectively fixedly connected to the ends of the two support frames (5), and the output ends of the two motors (10) are fixedly connected to gears (11), and the two gears (11) are respectively engaged with the two arc-shaped racks (9).

5. The cable insulation layer extrusion coating device according to claim 1, characterized in that: The first helix (1201) and the second helix (1202) are docked to form a complete helical leaf (12).

6. The cable insulation layer extrusion coating device according to any one of claims 2 to 4, characterized in that: It also includes a water storage tank (13), which is arranged between the cooling tank (29) and the coating mold (2).

7. The cable insulation layer extrusion coating device according to claim 6, characterized in that: The bottom end of the water storage tank (13) on the side close to the cooling tank (29) is fixedly connected to a first water pump (14), the water outlet end of the first water pump (14) is connected to a pumping pipe (15), and the pumping pipe (15) is fixedly connected to the plurality of second pipes (802).

8. The cable insulation layer extrusion coating device according to claim 7, characterized in that: The pumping pipe (15) comprises a first section (1501), a second section (1502) and a third section (1503), wherein the first section (1501) is connected to the water outlet of the first water pump (14), the third section (1503) is connected to a plurality of second pipes (802), and the second section (1502) is fixedly connected between the first section (1501) and the third section (1503).

9. The cable insulation layer extrusion coating device according to claim 8, characterized in that: A temperature sensor (16) is fixedly mounted on the first section (1501), and a detection end of the temperature sensor (16) is inserted into the interior of the first section (1501). A first external pipe (17) is fixedly connected to the surface of the second section (1502), and an electromagnetic valve (18) is mounted on the first external pipe (17). A second water pump (19) is also fixedly connected to the surface of the water tank (13), and an output end of the second water pump (19) is fixedly connected to the second external pipe (20).

10. A cable insulation layer coating method, comprising the cable insulation layer extrusion coating device according to claim 1, characterized in that: The following steps are involved: Step 1: Installation: The cable is passed through the coating mold (2), the annular rotating nozzle (4) and then the cooling pool (29); Step 2: Coating: The cable is passed through the coating mold (2), and the extruder (1) injects the plastic fluid into the coating mold (2), covering the surface of the cable with the plastic fluid; Step 3, cooling treatment: After water is passed into the water injection chamber, the water will be sprayed onto the surface of the coated cable through the annular rotating nozzle (4), and the sprayed water will converge into the annular rotating nozzle (4). The spiral assembly will drive the water in the annular rotating nozzle (4) in a spiral manner under the drive of the annular rotating nozzle (4), so that the water can be spirally driven on the surface of the coated cable, so that the water can evenly cover the surface of the cable.

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