Electric power protection tube machining forming machine

Abstract

The invention relates to the technical field of electric power protection pipe forming equipment, and discloses an electric power protection pipe machining forming machine which comprises a machine base, a plastic extruding machine and a cooling box are fixedly installed on the machine base, an overflow cooling device is fixedly installed in the cooling box, and the overflow cooling device comprises a transverse overflow pipe. A flow guide ring is installed in the middle of an inner cavity of the transverse overflow pipe, an annular groove is formed in the outer side of the flow guide ring, a water inlet pipe communicated with the annular groove is installed in the middle of the top end of the transverse overflow pipe, and a plurality of through holes are formed in the two sides of the flow guide ring respectively. Cooling water enters the annular groove through the water inlet pipe, impact force generated when the cooling water enters the annular groove is resisted by the inner side wall of the annular groove, and the cooling water is shunted to the two ends of the transverse overflow pipe through the through holes, overflows and flows into the cooling box to cool the power protection pipe, so that the surface of the power protection pipe is cooled more uniformly, and the cooling effect is better; and the electric power protection pipe is not easy to sink due to water flow impact, and has the advantage of low water consumption.

Description

Technical Field

[0001] The present application relates to the technical field of electric power protection tube forming equipment, and in particular to an electric power protection tube processing and forming machine. Background Art

[0002] The power protection tube is a pipeline device used to protect power cables, communication cables and other cables from external damage, chemical corrosion and electromagnetic interference. It is widely used in urban power grids, transportation facilities, industrial parks and other scenarios. The power protection tube processing and molding machine is a special equipment used to produce cable protection tubes made of materials such as MPP, CPVC, and BWFRP. Its core functions include raw material plasticization and extrusion, pipe shaping, cooling and cutting, and rapid clamping. Because the pipe is in a high-temperature softening state after extrusion, the key device for pipe molding includes the cooling system of the molding machine. Uniform cooling can prevent deformation and uneven shrinkage of the pipe. The existing cooling system of the power protection tube molding machine includes two cooling methods: spraying and immersion tank.

[0003] The Chinese utility model patent with application number 2022213973786 discloses a spray cooling device for cable protection tube extrusion molding, comprising a main body shell, a support seat, a limit frame, a conveying roller and a driving motor. The bottom end outer surface corners of the main body shell are provided with support seats, and the outer surfaces of both sides of the main body shell near the top are respectively provided with a feed port and a discharge port. The inside of both sides of the main body shell near the feed port and the discharge port are inclined with guide plates, and a limit frame is installed between the guide plate and the side of the guide plate near the top. The spray cooling device for cable protection tube extrusion molding is provided with a limit ring and a nozzle. During use, the device conveys the protective tube by the rotation of the conveying roller, and at the same time, the nozzles arranged at equal intervals on the inner wall of the limit ring can spray cooling on the protective tube in all directions, thereby ensuring the overall cooling effect. At the same time, the overall operation is automatic to ensure the overall work efficiency.

[0004] However, when the nozzles arranged around the inner wall of the limiting ring directly spray cooling water to cool the passing power protection tube, since the surface of the newly formed power protection tube is in a high-temperature softened state, the impact force of the cooling water will cause the surface of the power protection tube to concave and deform, affecting the forming quality of the power protection tube.

[0005] The utility model provides a kind of cable protection pipe extrusion injection molding machine for raw material drying, it is related to extrusion injection molding machine technical field, including: support apron, the top of support apron is equipped with heating injection module;The top of heating injection module is equipped with feed cover;The outside of feed cover is respectively equipped with servo motor and air heater, the output end of servo motor is equipped with gear, gear is rotatably installed in the side of feed cover;The inside of feed cover is equipped with annular structure's positioning guide pipe;The top of the inside of feed cover is equipped with positioning carrier plate;The inside of feed cover is also equipped with rotary sheet, and water content in raw material is dried by using connecting pipe to drive the hot air stream that jet pipe sprays, ensure the processing quality of PVC cable protection pipe, solve the problem that after raw material is melted extrusion injection molding, water is injected into the molding after raw material is melted, and bubble is generated in the inside of CPVC cable protection pipe.

[0006] It is provided with cooling tank, and flow guide pipe and backflow pipe are arranged in the cooling tank, and the protection pipe is cooled, but the top of the flow guide pipe is provided with a plurality of water outlets located on one side of the power protection pipe, and water is sprayed to cool the power protection pipe, and the water flow sprayed from the plurality of water outlets at the top of the flow guide pipe not only impacts the power protection pipe, but also consumes a large amount of circulating water. SUMMARY

[0007] The present application provides a kind of power protection pipe processing forming machine, with when cooling power protection pipe, power protection pipe is not easily impacted by water flow and concave, and the consumption of circulating cooling water is lower, to solve the problem that existing spray cooling mode is prone to make power protection pipe impacted by water flow and concave, and conventional immersion cooling mode is prone to make the consumption of cooling water large.

[0008] To achieve the above object, the present application adopts the following technical scheme: a kind of power protection pipe processing forming machine, including base, fixedly installed with extruder on base, fixedly installed with feeding box on one end of the top of extruder, the top of base is also fixedly installed with cooling box at one side of extruder, fixedly installed with overflow cooling device in cooling box, overflow cooling device includes horizontal overflow pipe, the inside of horizontal overflow pipe is circular groove design, and the middle of the inner chamber of horizontal overflow pipe is installed with flow guide ring, the outside of flow guide ring is provided with annular groove, the middle of the top of horizontal overflow pipe is installed with water inlet pipe communicated with annular groove, the two sides of flow guide ring are provided with a plurality of through holes, a plurality of through holes are circumferentially arrayed on flow guide ring, and annular groove is communicated with through hole, cooling water enters annular groove by water inlet pipe, and the impact force of cooling water entering is resisted by the inner wall of annular groove, cooling water is shunted and overflowed to cooling tank by through hole to the two ends of horizontal overflow pipe, and the bottom of cooling tank is connected with drain pipe.

[0009] Further, two support plates are fixedly installed inside the cooling box, and the horizontal overflow pipe is fixedly installed on the two support plates. The horizontal overflow pipe is supported by the two support plates fixedly installed in the cooling box, so that the axis of the inside of the horizontal overflow pipe is on the same straight line as the axis of the power protection pipe extruded by the extruding machine, and the power protection pipe extruded by the extruding machine can pass through the horizontal overflow pipe horizontally, so that the power protection pipe is cooled by overflow in the horizontal overflow pipe.

[0010] Further, end covers are fixedly installed at two ends of the horizontal overflow pipe respectively, and the end covers are fixed to the horizontal overflow pipe by bolts. The inside of the end cover is fixedly installed with a flow limiting ring. The inside of the flow limiting ring is close to the outside of the power protection pipe after molding without contact, and the outside of the flow limiting ring is attached to the inside of the horizontal overflow pipe. The cooling water in the horizontal overflow pipe overflows from the gap between the inside of the flow limiting ring and the outside of the power protection pipe after molding, so that the flowing cooling water can fully act on the surface of the power protection pipe, improving the heat dissipation effect of the power protection pipe. At the same time, by setting the flow limiting ring, the water flow from the two ends of the horizontal overflow pipe is controlled. Compared with the existing immersion tank immersed by cooling water, the water consumption is small, and the phenomenon of temperature stratification of cooling water does not occur, improving the cooling effect of the power protection pipe.

[0011] Further, the inner edge of the outside of the flow limiting ring is provided with a sealing ring attached to the inside of the horizontal overflow pipe to prevent the cooling water in the horizontal overflow pipe from penetrating through the connection part of the flow limiting ring and the horizontal overflow pipe.

[0012] Further, a limiting ring sleeve between the flow guide ring and the flow limiting ring is movably sleeved in the horizontal overflow pipe, and the outside of the limiting ring sleeve is attached to the outside of the horizontal overflow pipe. The inside of the limiting ring sleeve is located on the outside of the flow guide ring, so that the limiting ring sleeve does not affect the horizontal flow of the cooling water in the annular groove through the through hole. The limiting ring sleeve is fixedly installed on both sides of the horizontal overflow pipe by the end cover, and the flow guide ring movably arranged in the horizontal overflow pipe is limited by the limiting ring sleeve, so that the flow guide ring remains in the middle of the inner cavity of the horizontal overflow pipe. It is not necessary to fix the flow guide ring additionally, which facilitates the installation and disassembly of the whole overflow cooling device.

[0013] Further, the inner diameter of the limiting ring sleeve increases uniformly from the side close to the flow guide ring to the side away from the flow guide ring, and the inner diameter of the through hole away from the through hole is greater than the inner diameter of the flow limiting ring. The cooling water flowing horizontally through the through hole overflows through the gap between the inside of the flow limiting ring and the outside of the power protection pipe under the guidance of the inside of the limiting ring sleeve, so that the flow of the cooling water overflowing from the inside of the horizontal overflow pipe to the outside is better, which can improve the cooling effect of the power protection pipe.

[0014] Further, the two ends of the transverse overflow pipe are respectively fixedly provided with end covers, the inner sides of the end covers are movably provided with two limiting ring plates, the limiting ring plate away from the end cover is movably connected with the limiting ring sleeve arranged on one side of the flow guide ring, the opposite sides of the two limiting ring plates are respectively fixedly provided with positioning ring sleeves, the air bag is fixedly sleeved between the two positioning ring sleeves, the top of the base is fixedly provided with two air inlet branch pipes, the two air inlet branch pipes are respectively communicated with the outer chamber of the air bag in the transverse overflow pipe, the air inlet branch pipes are used for injecting air into the outer chamber of the flow guide ring in the transverse overflow pipe to pressurize, so that the air bag is inflated inwards, and the air amount of the outer chamber of the air bag can be increased or reduced, so that the power protection pipe of different sizes can be adapted, the cooling water can overflow to both ends in the transverse overflow pipe to cool the power protection pipe, and the water flow is reduced as much as possible to reduce the consumption of the cooling water.

[0015] Further, the spring movably arranged between the two limiting ring plates is located in the inner side of the air bag, after the air bag is inflated inwards, the limiting effect of the spring is combined, so that the inflated part of the air bag can be close to the outer side of the power protection pipe, and the air bag is prevented from being attached to the outer side of the power protection pipe after being inflated by air injection and pressurization, so as to affect the outer surface of the power protection pipe.

[0016] Further, the outer side of the positioning ring sleeve is provided with a sealing ring, and the outer side of the sealing ring is attached to the inner wall of the transverse overflow pipe, the effective sealing is formed by arranging the sealing ring on the outer side of the two positioning ring sleeves, so as to guarantee the sealing performance of the outer chamber of the air bag in the transverse overflow pipe, and the air leakage problem is prevented when the outer chamber of the air bag is injected with air and pressurized.

[0017] Further, the inner side of the cooling box is fixedly provided with the flow guide plate located below the transverse overflow pipe, and the flow guide plate is inclined, the downward inclined end of the flow guide plate is not in contact with the inner side wall of one side of the cooling box, so as to reserve the gap for the cooling water to flow downwards from the top of the flow guide plate, the cooled water forms a flow in the cooling box, and the heat dissipation and cooling of the cooling water in the cooling box are facilitated, so as to be recycled.

[0018] The present application has the following advantages: 1. The power protection tube processing and forming machine provided by the application, through the structural arrangement of the overflow cooling device, the power protection tube extruded by the extruder passes through the transversely arranged overflow pipe in the overflow cooling device, a flow guide ring is arranged in the middle of the inner cavity of the transversely arranged overflow pipe, the cooling water enters the flow guide ring, the inner side wall of the annular groove resists the impact force of the cooling water entering, and the cooling water is divided and overflowed to both ends of the transversely arranged overflow pipe through the through holes, so that the power protection tube is cooled, compared with the existing spray cooling method, the cooling of the surface of the power protection tube is more uniform, the cooling effect is better, and the power protection tube is not easily dented by water flow, so that the final forming quality of the power protection tube is better, compared with the existing immersion tank cooling method, the water consumption is small, and the phenomenon of temperature stratification of the cooling water does not occur, so that the cooling effect of the power protection tube is good.

[0019] 2. The power protection tube processing and forming machine provided by the application, through the detachable design of the flow limiting ring at both ends of the transversely arranged overflow pipe, the inner diameter of the flow limiting ring can be replaced according to the size of the protection forming pipe, so as to control the gap between the inner side of the flow limiting ring and the outer side of the power protection tube, and then control the flow of the cooling water overflowing from both ends of the transversely arranged overflow pipe, so as to save the consumption of the cooling water, thereby improving the application range of the power protection tube forming machine. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings: Figure 1 is a structural schematic diagram of the application; Figure 2 is Figure 1 is a schematic diagram of the internal structure of the cooling box; Figure 3 is a sectional view of the overflow cooling device in embodiment one; Figure 4 is Figure 3 is a front view of Figure 5 is a structural schematic diagram of the limiting ring sleeve in the transversely arranged overflow pipe in embodiment two; Figure 6 is a sectional view of the overflow cooling device in embodiment three; Figure 7 is Figure 6 is a front view of

[0021] In the figure: 1. machine base; 2. extruder; 3. feeding box; 4. cooling box; 5. water inlet pipe; 6. drain pipe; 7. support plate; 801. horizontal overflow pipe; 802. guide ring; 8021. annular groove; 8022. through hole; 803. end cover; 804. flow limiting ring; 805. limiting ring sleeve; 806. limiting ring plate; 807. positioning ring sleeve; 808. air bag; 809. spring; 9. guide plate; 10. intake branch pipe; 11. tee pipe; 12. intake main pipe. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0023] Example 1, as Figure 1 A power protection tube processing and molding machine includes a machine base 1, on which an extruder 2 is fixedly mounted, and a feeding box 3 is fixedly mounted at one end of the top of the extruder 2. The raw materials for the protection tube fall from the machine base 1 into the extruder 2 and are extruded and molded by the end of the extruder 2 away from the feeding box 3. A cooling box 4 is also fixedly mounted on the top of the machine base 1 and is located on one side of the extruder 2. Please refer to Figures 2-4 On both sides of the cooling box 4, there are respectively provided with through grooves for the formed power protection tube to pass through, and the through grooves are located in the upper half of the side of the cooling box 4. The back of the cooling box 4 is connected to a water inlet pipe 5, and the bottom of the cooling box 4 is connected to a drain pipe 6. Cooling water is continuously introduced through the water inlet pipe 5, and the cooling water is discharged from the drain pipe 6 to cool the formed power protection tube passing through the cooling box 4.

[0024] Two support plates 7 are fixedly installed inside the base 1, and an overflow cooling device is fixedly installed on the top of the two support plates 7. The overflow cooling device includes a horizontal overflow pipe 801 fixedly installed on the two support plates 7. The inner side of the horizontal overflow pipe 801 is designed as a circular groove. The middle part of the top of the horizontal overflow pipe 801 is fixedly connected to the cooling box 4, and the cooling box 4 is connected to the inner cavity of the horizontal overflow pipe 801. The middle part of the horizontal overflow pipe 801 is movably sleeved with a guide ring 802, and the outer side of the guide ring 802 is provided with a guide ring. The annular groove 8021 is connected to the water inlet pipe 5, and a plurality of through holes 8022 are respectively provided on both sides of the guide ring 802. The number of the through holes 8022 is not less than four, and the plurality of through holes 8022 are distributed in a circular array on the guide ring 802. The annular groove 8021 is connected to the through holes 8022. The cooling water enters the annular groove 8021 through the water inlet pipe 5. The inner side wall of the annular groove 8021 resists the impact force of the cooling water entering. The cooling water is diverted and overflowed to the two ends of the horizontal overflow pipe 801 through the through holes 8022.

[0025] The two ends of the horizontal overflow pipe 801 are respectively fixed with end covers 803, which are fixed to the horizontal overflow pipe 801 by bolts. A limiting ring 804 is fixed on the inner side of the end cover 803. The inner side of the limiting ring 804 is close to the outer side of the formed power protection tube but not in contact with it. The outer side of the limiting ring 804 fits the inner side of the horizontal overflow pipe 801, and the inner edge of the outer side of the limiting ring 804 is provided with a sealing ring that fits the inner side of the horizontal overflow pipe 801 to prevent the cooling water in the horizontal overflow pipe 801 from penetrating through the connection between the limiting ring 804 and the horizontal overflow pipe 801. The horizontal overflow pipe 801 is also movably provided with a guide ring 802 and a limiting ring 804. 04, and the outer side of the limiting ring sleeve 805 is fitted with the outer side of the horizontal overflow pipe 801, and the inner side of the limiting ring sleeve 805 is located on the outer side of the guide ring 802, so that the limiting ring sleeve 805 will not affect the cooling water in the annular groove 8021 to flow out horizontally from the through hole 8022. It is fixedly installed on both sides of the horizontal overflow pipe 801 through the end cover 803. The setting of the limiting ring sleeve 805 is used to limit the guide ring 802 movably set in the horizontal overflow pipe 801, so that the guide ring 802 is kept in the middle of the inner cavity of the horizontal overflow pipe 801, and there is no need to fix the guide ring 802 additionally, which facilitates the installation and disassembly of the overflow cooling device as a whole.

[0026] A guide plate 9 located below the horizontal overflow pipe 801 is fixedly installed inside the cooling box 4, and the guide plate 9 is tilted. The downwardly tilted end of the guide plate 9 does not contact the inner wall of one side of the cooling box 4, thereby reserving a gap for cooling water to flow from the top of the guide plate 9 to the bottom. The drain pipe 6 is set close to the inner wall of the other side of the cooling box 4.

[0027] When in use, first fix the corresponding limiting ring 804 to the end cover 803 according to the size of the electric power protection tube to be processed, and fix the end cover 803 and the limiting ring 804 to the two ends of the horizontal overflow pipe 801 respectively, so that the inner diameter of the limiting ring 804 is close to the outer diameter of the electric power protection tube without touching, and an overflow gap is reserved for cooling water to flow through. Then, the protective tube processing material in the machine base 1 is extruded into the electric power protection tube by the extruder 2, and the formed electric power protection tube is passed through the through groove, end cover 803, limiting ring 804 and guide ring 802 on the cooling box 4. At the same time, cooling water is continuously introduced into the interior of the horizontal overflow pipe 801 through the water inlet pipe 5, and the cooling water first enters the ring outside the guide ring 802. In the annular groove 8021, the inner wall of the annular groove 8021 resists the impact force of the cooling water entering, and then the cooling water will be diverted to both sides through the through hole 8022, and the horizontal overflow pipe 801 is full of cooling water during the whole process, so as to cool the formed power protection tube. The cooling water in the horizontal overflow pipe 801 overflows from the gap between the inner side of the flow limiting ring 804 and the outer side of the formed power protection tube. The cooling water overflowing from both ends of the horizontal overflow pipe 801 falls on the guide plate 9 and flows downward along the inclined surface of the guide plate 9, and finally flows to the drain pipe 6 on the other side and is discharged, so that the cooled water forms a flow in the cooling box 4, which is beneficial to the heat dissipation and cooling of the cooling water in the cooling box 4.

[0028] Example 2, as Figure 5 On the basis of Example 1, the difference from Example 1 is that the inner diameter of the limiting ring sleeve 805 increases uniformly from the side close to the through hole 8022 to the side away from the through hole 8022, and the inner diameter of the through hole 8022 on the side away from the through hole 8022 is larger than the inner diameter of the flow limiting ring 804. The cooling water flowing out horizontally through the through hole 8022 overflows through the gap between the inner side of the flow limiting ring 804 and the outer side of the power protection tube under the guidance of the inner side of the limiting ring sleeve 805. Compared with Example 1, the cooling water overflowing from the inside of the horizontal overflow pipe 801 to the outside has better fluidity, which can improve the cooling effect of the power protection tube.

[0029] Example 3, as Figures 1-2 、 Figures 6-7 A power protection tube processing and molding machine includes a machine base 1, on which an extruder 2 is fixedly mounted, and a feeding box 3 is fixedly mounted at one end of the top of the extruder 2. The raw materials for the protection tube fall from the machine base 1 into the extruder 2 and are extruded and molded by the end of the extruder 2 away from the feeding box 3. A cooling box 4 is also fixedly mounted on the top of the machine base 1 and is located on one side of the extruder 2. Please refer to Figures 2-4On both sides of the cooling box 4, there are respectively provided with through grooves for the formed power protection tube to pass through, and the through grooves are located in the upper half of the side of the cooling box 4. The back of the cooling box 4 is connected to a water inlet pipe 5, and the bottom of the cooling box 4 is connected to a drain pipe 6. Cooling water is continuously introduced through the water inlet pipe 5, and the cooling water is discharged from the drain pipe 6 to cool the formed power protection tube passing through the cooling box 4.

[0030] Two support plates 7 are fixedly installed inside the base 1, and an overflow cooling device is fixedly installed on the top of the two support plates 7. The overflow cooling device includes a horizontal overflow pipe 801 fixedly installed on the two support plates 7. The inner side of the horizontal overflow pipe 801 is designed as a circular groove. The middle part of the top of the horizontal overflow pipe 801 is fixedly connected to the cooling box 4, and the cooling box 4 is connected to the inner cavity of the horizontal overflow pipe 801. The middle part of the horizontal overflow pipe 801 is movably sleeved with a guide ring 802, and the outer side of the guide ring 802 is provided with a guide ring. The annular groove 8021 is connected to the water inlet pipe 5, and a plurality of through holes 8022 are respectively provided on both sides of the guide ring 802. The number of the through holes 8022 is not less than four, and the plurality of through holes 8022 are distributed in a circular array on the guide ring 802. The annular groove 8021 is connected to the through holes 8022. The cooling water enters the annular groove 8021 through the water inlet pipe 5. The inner side wall of the annular groove 8021 resists the impact force of the cooling water entering. The cooling water is diverted and overflowed to the two ends of the horizontal overflow pipe 801 through the through holes 8022.

[0031] The two ends of the horizontal overflow pipe 801 are fixedly installed with end covers 803, and two limiting ring plates 806 are movably installed on the inner side of the end cover 803. The limiting ring plate 806 on the side away from the end cover 803 is movably connected to the limiting ring sleeve 805 set on the side of the guide ring 802. The two limiting ring plates 806 are fixedly installed on the opposite sides of the two limiting ring plates 806. The outer side of the positioning ring sleeve 807 is provided with a sealing ring, and the outer side of the sealing ring is in contact with the inner wall of the horizontal overflow pipe 801. There is a seal between the two positioning ring sleeves 807. An airbag 808 is fixedly mounted on the sleeve, and a spring 809 located on the inner side of the airbag 808 is movably arranged between the two limiting ring plates 806. Two air intake branch pipes 10 are fixedly mounted on the top of the machine base 1. The two air intake branch pipes 10 are respectively connected to the outer chambers of the airbag 808 in the horizontal overflow pipe 801, and the two air intake branch pipes 10 are connected to a tee pipe 11 at one end away from the horizontal overflow pipe 801. The top of the tee pipe 11 is connected to an air intake main pipe 12, and the end of the air intake main pipe 12 away from the tee pipe 11 is connected to the air pump.

[0032] By injecting air and pressurizing at one end of the intake manifold 12, and utilizing the connecting function of the tee pipe 11 and the intake branch pipe 10, the air pressure outside the airbag 808 in the horizontal overflow pipe 801 is increased, thereby causing the airbag 808 to expand inward. Cooperating with the limiting function of the spring 809, the expanded part of the airbag 808 can be close to the outside of the power protection tube, and according to the size of the power protection tube, by increasing or decreasing the inflation amount of the outer chamber of the airbag 808, it can adapt to power protection tubes of different sizes. Compared with the first embodiment, there is no need to replace the limiting ring 804 according to the size of the power protection tube, and the limiting function of the spring 809 can also prevent the airbag 808 from sticking to the outside of the power protection tube after inflation and pressurization, causing problems on the outer surface of the power protection tube.

[0033] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power protection tube processing and molding machine, comprising a machine base, an extruder fixedly mounted on the machine base, a feeding box fixedly mounted on one end of the top of the extruder, and a cooling box fixedly mounted on the top of the machine base on one side of the extruder, characterized in that: An overflow cooling device is fixedly installed in the cooling box, and the overflow cooling device includes a horizontal overflow pipe. The inner side of the horizontal overflow pipe is designed as a circular groove, and a guide ring is installed in the middle of the inner cavity of the horizontal overflow pipe. An annular groove is provided on the outer side of the guide ring. A water inlet pipe connected to the annular groove is installed in the middle of the top of the horizontal overflow pipe. A plurality of through holes are respectively provided on both sides of the guide ring. The plurality of through holes are distributed in a circular array on the guide ring, and the annular groove is connected to the through holes. The cooling water enters the annular groove through the water inlet pipe, and the inner side wall of the annular groove resists the impact force of the cooling water entering. The cooling water overflows through the through holes to the two ends of the horizontal overflow pipe and flows into the cooling box. The bottom of the cooling box is connected to a drain pipe.

2. The electric power protection tube forming machine according to claim 1, characterized in that: Two support plates are fixedly installed inside the cooling box, and the transverse overflow pipe is fixedly installed on the two support plates.

3. The electric power protection tube forming machine according to claim 1, characterized in that: End covers are fixedly installed at both ends of the horizontal overflow pipe, and the end covers are fixed to the horizontal overflow pipe by bolts. A limiting ring is fixedly installed on the inner side of the end cover. The inner side of the limiting ring is close to the outer side of the formed power protection tube but not in contact with it, and the outer side of the limiting ring is in contact with the inner side of the horizontal overflow pipe.

4. The electric power protection tube forming machine according to claim 3, characterized in that: The inner edge of the outer side of the flow limiting ring is provided with a sealing ring which fits with the inner side of the horizontal overflow pipe.

5. The electric power protection tube forming machine according to claim 3, characterized in that: The horizontal overflow pipe is also movably provided with a limiting ring sleeve located between the guide ring and the limiting ring, and the outer side of the limiting ring sleeve is in contact with the outer side of the horizontal overflow pipe, and the inner side of the limiting ring sleeve is located outside the guide ring.

6. The power protection tube forming machine according to claim 5, characterized in that: The inner diameter of the limiting ring sleeve increases evenly from the side close to the guide ring to the side away from the guide ring, and the inner diameter of the through hole away from the through hole is larger than the inner diameter of the limiting ring.

7. The power protection tube forming machine according to claim 1, characterized in that: End covers are fixedly installed at both ends of the horizontal overflow pipe, and two limiting ring plates are movably installed on the inner side of the end cover, wherein the limiting ring plate away from the end cover is movably connected to the limiting ring sleeve provided on the side of the guide ring, and positioning ring sleeves are fixedly installed on the opposite sides of the two limiting ring plates, and an air bag is fixedly installed between the two positioning ring sleeves. Two air intake branches are fixedly installed on the top of the machine base, and the two air intake branches are respectively connected to the outer chamber of the air bag in the horizontal overflow pipe.

8. The electric power protection tube forming machine according to claim 7, characterized in that: A spring located inside the airbag is movably arranged between the two limiting ring plates.

9. The electric power protection tube forming machine according to claim 7, characterized in that: A sealing ring is provided on the outer side of the positioning ring sleeve, and the outer side of the sealing ring is in contact with the inner wall of the horizontal overflow pipe.

10. The electric power protection tube forming machine according to claim 1, characterized in that: A guide plate located below the horizontal overflow pipe is fixedly installed inside the cooling box, and the guide plate is arranged obliquely, and the downwardly inclined end of the guide plate does not contact the inner side wall of one side of the cooling box.

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