A cooling device for an MPP cable protection pipe after extrusion

Abstract

The present invention relates to the technical field of MPP cable protection pipe processing, and particularly relates to a cooling device for an MPP cable protection pipe after extrusion, which includes a chassis. Inlet pipes and outlet pipes are respectively arranged at both ends of the chassis. A cooling mechanism is installed inside the chassis. A water removal mechanism is installed outside the outlet pipe of the chassis. A collection trough is arranged at the bottom side of the chassis, and the collection trough is connected to a drain pipe; the annular inner pipes of the first ring spraying assembly, the second ring spraying assembly, the third ring spraying assembly and the fourth ring spraying assembly are equally spaced, and as the annular inner pipes rotate, cooling water is rotated around the MPP cable protection pipe through the spray holes and evenly sprayed on the outer side of the MPP cable protection pipe, so as to simultaneously and evenly cool the outer wall of the MPP cable protection pipe, and ensure that the MPP cable protection pipe is in full and thorough contact with the cooling water instantaneously.

Description

Technical Field

[0001] The present invention relates to the technical field of MPP cable protection pipe processing, and in particular to a cooling device for MPP cable protection pipes after extrusion. Background Art

[0002] MPP pipes, also known as MPP power cable protection pipes, are divided into excavation type and non-excavation type. MPP non-excavation pipes are also called MPP jacking pipes or dragging pipes. MPP pipes use modified polypropylene as the main raw material, have the characteristics of high temperature resistance and external pressure resistance, and are suitable for medium and low voltage power transmission line cable duct pipes below 10KV.

[0003] After the MPP cable protection pipe is processed and formed by an extruder, at this time, the cooling device is used to cool down the MPP cable protection pipe. The existing cooling device directly cools the MPP cable protection pipe through a fixed annular pipe, resulting in the sprayed cooling water being unable to fully contact the outer wall of the MPP cable protection pipe in a very short time. At the same time, directly using cold water for cooling is likely to cause a large temperature difference, resulting in rapid cold shrinkage and uneven cooling of the MPP cable protection pipe. Moreover, before and after cooling, it is impossible to intuitively understand the cooling effect, and thus it is impossible to quickly adjust the temperature of the cooling water; a large amount of cooling water adheres to the surface of the cooled and shaped MPP cable protection pipe, and when transferred later, it drips onto the ground, affecting the processing environment. Summary of the Invention

[0004] The problem solved by the present invention is to provide a cooling device for MPP cable protection pipes after extrusion, which solves the technical problems that after the MPP cable protection pipe is processed and formed by an extruder, at this time, the cooling device is used to cool down the MPP cable protection pipe. The existing cooling device directly cools the MPP cable protection pipe through a fixed annular pipe, resulting in the sprayed cooling water being unable to fully contact the outer wall of the MPP cable protection pipe in a very short time. At the same time, directly using cold water for cooling is likely to cause a large temperature difference, resulting in rapid cold shrinkage and uneven cooling of the MPP cable protection pipe. Moreover, before and after cooling, it is impossible to intuitively understand the cooling effect, and thus it is impossible to quickly adjust the temperature of the cooling water; a large amount of cooling water adheres to the surface of the cooled and shaped MPP cable protection pipe, and when transferred later, it drips onto the ground, affecting the processing environment.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A cooling device for MPP cable protection pipes after extrusion, including a chassis, with an inlet pipe and an outlet pipe respectively opened at both ends of the chassis. A cooling mechanism is installed inside the chassis, a water removal mechanism is installed outside the outlet pipe of the chassis, a collection tank is arranged at the bottom side of the chassis, and the collection tank is connected to a drain pipe;

[0007] The water removal mechanism includes a first annular spray assembly, a second annular spray assembly, a third annular spray assembly, and a fourth annular spray assembly that are equidistantly arranged in the chassis and spray the MPP cable protection pipe. The cooling water temperatures sprayed by the first annular spray assembly, the second annular spray assembly, the third annular spray assembly, and the fourth annular spray assembly gradually decrease. The first annular spray assembly, the second annular spray assembly, the third annular spray assembly, and the fourth annular spray assembly each include an annular outer pipe cover fixedly connected to the top side of the inner wall of the chassis and an annular inner pipe that rotates around the MPP cable protection pipe. The annular inner pipe is installed inside the annular outer pipe cover through a sealing ring. An inlet water groove communicating with the annular outer pipe cover is opened on the outer side of the annular inner pipe, and a plurality of spray holes are equally angled and opened on the inner side of the annular inner pipe.

[0008] Preferably, a plurality of first connecting arms are used to connect the adjacent annular outer pipe covers. The side wall of the annular inner pipe of the first annular spray assembly is connected to the ring seat through a plurality of second connecting arms. A plurality of first electromagnetic ultrasonic sensors are equally angled and installed on the outer side of the ring seat, and the ring seat is connected to the inner wall of the chassis through a bearing.

[0009] Preferably, the side wall of the annular inner pipe of the fourth annular spray assembly is connected to a gear ring through a plurality of third connecting arms. A plurality of second electromagnetic ultrasonic sensors are equally angled and installed on the outer side of the gear ring.

[0010] Preferably, a mounting plate is installed on the inner wall of the chassis. A motor is installed on the mounting plate. A rotating gear is installed at the output end of the motor, and the rotating gear meshes with the gear ring.

[0011] Preferably, the water removal mechanism includes a horn-shaped air hood. The inner wall of the air hood is connected to the gear ring through a plurality of fourth connecting arms. The air hood is connected to the outlet pipe through a bearing. An air cavity is opened inside the air hood, and a plurality of air holes inclined towards the outlet pipe are opened on the inner wall of the air hood.

[0012] Preferably, a sealing ring is installed on the outer side of the chassis through a support arm. The sealing ring is installed on the outer side of the air hood through a gasket. An air pipe communicating with the air cavity is installed on the sealing ring.

[0013] Preferably, water inlet pipes are installed on the side walls of a plurality of the annular outer pipe covers. The water inlet pipe of the first annular spray assembly is communicated with a first three-way valve, and the first three-way valve is connected to a hot water pipe.

[0014] Preferably, the water inlet pipe of the second annular spray assembly is communicated with a first mixing valve, and the first mixing valve is communicated with a second three-way valve. The second three-way valve is connected to the first three-way valve through a pipeline.

[0015] Preferably, the water inlet pipe of the third annular spray assembly is communicated with a second mixing valve, and the second mixing valve is connected to the first mixing valve through a pipeline.

[0016] Preferably, the water inlet pipe of the fourth ring spraying assembly is communicated with the third three-way valve, the third three-way valve is communicated with the cold water pipe, and the third three-way valve is respectively communicated with the second three-way valve and the second mixing valve through pipelines.

[0017] The beneficial effects of the present invention are as follows: the annular inner pipes, ring seats, toothed rings and the wind covers of the water removing mechanisms of the first ring spraying assembly, the second ring spraying assembly, the third ring spraying assembly and the fourth ring spraying assembly all realize synchronous rotation through motors;

[0018] The annular inner pipes of the first ring spraying assembly, the second ring spraying assembly, the third ring spraying assembly and the fourth ring spraying assembly are equally spaced, and as the annular inner pipes rotate, the cooling water is rotated around the MPP cable protection pipe through the spray holes and evenly sprayed on the outer side of the MPP cable protection pipe, realizing simultaneous and uniform cooling of the outer wall of the MPP cable protection pipe, and ensuring full and thorough instantaneous contact between the MPP cable protection pipe and the cooling water;

[0019] The rotation of the ring seat comprehensively monitors the wall thickness of the MPP cable protection pipe before cooling through the first electromagnetic ultrasonic sensor, and the rotation of the toothed ring comprehensively monitors the wall thickness of the MPP cable protection pipe after cooling through the second electromagnetic ultrasonic sensor. By monitoring and comparing the wall thickness of the MPP cable protection pipe before and after cooling, the water temperature of the cold and hot water entering the cooling mechanism is adjusted in time to avoid uneven wall thickness caused by too large temperature difference;

[0020] The rotation of the wind cover facilitates evenly spraying the wind on the outer wall of the MPP cable protection pipe through the wind holes, blowing the water on the outer wall of the MPP cable protection pipe down, and avoiding water leakage;

[0021] The first ring spraying assembly located at the water inlet directly cools the MPP cable protection pipe with hot water, the fourth ring spraying assembly located at the water outlet directly cools the MPP cable protection pipe with cold water, the second ring spraying assembly mixes cold and hot water through the first mixing valve to obtain primary mixed water for cooling the MPP cable protection pipe, and the third ring spraying assembly mixes the primary mixed water with cold water through the second mixing valve to obtain secondary mixed water for cooling the MPP cable protection pipe. Furthermore, the water temperature for cooling in the first ring spraying assembly, the second ring spraying assembly, the third ring spraying assembly and the fourth ring spraying assembly is gradually reduced, realizing step-by-step cooling of the MPP cable protection pipe, and avoiding rapid cold shrinkage and uneven cooling of the MPP cable protection pipe caused by too large temperature difference. Description of the Drawings

[0022] Figure 1 It is the first overall structural schematic diagram of the present invention;

[0023] Figure 2 It is the second overall structural schematic diagram of the present invention;

[0024] Figure 3 It is the overall cross-sectional view of the present invention;

[0025] Figure 4 This is the first structural schematic diagram of the cooling mechanism of the present invention;

[0026] Figure 5 This is the cross-sectional view of the annular spray assembly of the present invention;

[0027] Figure 6 This is the second structural schematic diagram of the cooling mechanism of the present invention.

[0028] Legend:

[0029] 1. Chassis; 2. Inlet pipe; 3. Outlet pipe; 4. Collection tank; 5. Drain pipe; 6. Cooling mechanism; 7. Water removal mechanism; 8. First annular spray assembly; 9. Second annular spray assembly; 10. Third annular spray assembly; 11. Fourth annular spray assembly; 12. Annular outer pipe cover; 13. Annular inner pipe; 14. Water inlet tank; 15. Spray holes; 16. First connecting arm; 17. Second connecting arm; 18. Ring seat; 19. First electromagnetic ultrasonic sensor; 20. Third connecting arm; 21. Tooth ring; 22. Second electromagnetic ultrasonic sensor; 23. Mounting plate; 24. Motor; 25. Rotating teeth; 26. Fourth connecting arm; 27. Wind hood; 28. Wind cavity; 29. Wind holes; 30. Support arm; 31. Sealing ring; 32. Air duct; 33. Water inlet pipe; 34. First three-way valve; 35. Second three-way valve; 36. First mixing valve; 37. Second mixing valve; 38. Third three-way valve; 39. Hot water pipe; 40. Cold water pipe. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0031] The following gives specific embodiments.

[0032] Refer to Figures 1 to 6 , a cooling device for an MPP cable protection pipe after extrusion, including a chassis 1, an inlet pipe 2 and an outlet pipe 3 are respectively provided at both ends of the chassis 1, a cooling mechanism 6 is installed inside the chassis 1, a water removal mechanism 7 is installed outside the outlet pipe 3 of the chassis 1, a collection tank 4 is arranged at the bottom side of the chassis 1, the collection tank 4 is connected to a drain pipe 5, the cooling water sprayed by the cooling mechanism 6 is collected through the collection tank 4 and finally collected through the drain pipe 5 into a heating device, and is heated and transported into a hot water pipe 39 for recycling, saving resources;

[0033] The water removal mechanism 7 includes a first ring spray assembly 8, a second ring spray assembly 9, a third ring spray assembly 10, and a fourth ring spray assembly 11 that are equidistantly arranged in the chassis 1 and spray the MPP cable protection pipe. The water temperature of the cooling water sprayed by the first ring spray assembly 8, the second ring spray assembly 9, the third ring spray assembly 10, and the fourth ring spray assembly 11 gradually decreases. The first ring spray assembly 8, the second ring spray assembly 9, the third ring spray assembly 10, and the fourth ring spray assembly 11 each include an annular outer pipe cover 12 fixedly connected to the top side of the inner wall of the chassis 1 and an annular inner pipe 13 that rotates around the MPP cable protection pipe. The annular inner pipe 13 is installed inside the annular outer pipe cover 12 through a sealing ring. An inlet groove 14 communicating with the annular outer pipe cover 12 is provided on the outer side of the annular inner pipe 13, facilitating the continuous connection between the water inlet pipe 33 and the annular outer pipe cover 12 when the annular inner pipe 13 rotates, providing cooling water for the spray holes 15 to spray water. A number of spray holes 15 are equiangularly provided on the inner side of the annular inner pipe 13. The adjacent annular outer pipe covers 12 are connected by a number of first connecting arms 16. The side wall of the annular inner pipe 13 of the first ring spray assembly 8 is connected to the ring seat 18 through a number of second connecting arms 17. A number of first electromagnetic ultrasonic sensors 19 are equiangularly installed on the outer side of the ring seat 18, and the ring seat 18 is connected to the inner wall of the chassis 1 through a bearing. The side wall of the annular inner pipe 13 of the fourth ring spray assembly 11 is connected to the gear ring 21 through a number of third connecting arms 20. A number of second electromagnetic ultrasonic sensors 22 are equiangularly installed on the outer side of the gear ring 21. An installation plate 23 is installed on the inner wall of the chassis 1, and a motor 24 is installed on the installation plate 23. A rotating gear 25 is installed at the output end of the motor 24, and the rotating gear 25 meshes with the gear ring 21. By the operation of the motor 24, the rotating gear 25 rotates, driving the meshing gear ring 21 to rotate, realizing the synchronous rotation of the annular inner pipes 13, the ring seats 18, the gear rings 21, and the wind hood 27 of the water removal mechanism 7 of the first ring spray assembly 8, the second ring spray assembly 9, the third ring spray assembly 10, and the fourth ring spray assembly 11;

[0034] The annular inner pipes 13 of the first ring spray assembly 8, the second ring spray assembly 9, the third ring spray assembly 10, and the fourth ring spray assembly 11 are equidistantly distributed. As the annular inner pipes 13 rotate, the cooling water passes through the spray holes 15 and rotates around the MPP cable protection pipe, evenly spraying on the outer side of the MPP cable protection pipe, realizing the simultaneous and uniform cooling of the outer wall of the MPP cable protection pipe, ensuring that the MPP cable protection pipe is in full and thorough contact with the cooling water instantaneously. The rotation of the ring seat 18 comprehensively monitors the wall thickness of the MPP cable protection pipe before cooling through the first electromagnetic ultrasonic sensor 19. The rotation of the gear ring 21 comprehensively monitors the wall thickness of the MPP cable protection pipe after cooling through the second electromagnetic ultrasonic sensor 22. By monitoring and comparing the wall thickness of the MPP cable protection pipe before and after cooling, the water temperature of the cold and hot water entering the cooling mechanism 6 is adjusted in a timely manner to avoid uneven wall thickness caused by excessive temperature difference.

[0035] The water removal mechanism 7 includes a horn-shaped air hood 27. The inner wall of the air hood 27 is connected to the toothed ring 21 through a plurality of fourth connecting arms 26. The air hood 27 is connected to the outlet pipe 3 through a bearing. An air cavity 28 is provided inside the air hood 27. A plurality of air holes 29 inclined towards the outlet pipe 3 are provided on the inner wall of the air hood 27. A sealing ring 31 is installed outside the chassis 1 through a support arm 30. The sealing ring 31 is installed on the outside of the air hood 27 through a gasket. An air pipe 32 communicating with the air cavity 28 is installed on the sealing ring 31. The rotation of the air hood 27 facilitates evenly spraying the air through the air holes 29 on the outer wall of the MPP cable protection pipe, blowing off the water on the outer wall of the MPP cable protection pipe, and preventing water from leaking. When the air hood 27 rotates, the sealing ring 31 remains stationary, ensuring that the air cavity 28 and the air pipe 32 are in a communicating state.

[0036] A water inlet pipe 33 is installed on the side wall of each of the plurality of annular outer pipe covers 12. The water inlet pipe 33 of the first ring spraying assembly 8 is communicated with a first three-way valve 34, and the first three-way valve 34 is connected to a hot water pipe 39. The water inlet pipe 33 of the second ring spraying assembly 9 is communicated with a first mixing valve 36, and the first mixing valve 36 is communicated with a second three-way valve 35. The second three-way valve 35 is communicated with the first three-way valve 34 through a pipeline. The water inlet pipe 33 of the third ring spraying assembly 10 is communicated with a second mixing valve 37, and the second mixing valve 37 is communicated with the first mixing valve 36 through a pipeline. The water inlet pipe 33 of the fourth ring spraying assembly 11 is connected to a third three-way valve 38. The third three-way valve 38 is communicated with a cold water pipe 40, and the third three-way valve 38 is communicated with the second three-way valve 35 and the second mixing valve 37 respectively through pipelines. The first ring spraying assembly 8 located at the inlet pipe 2 directly cools the MPP cable protection pipe with hot water. The fourth ring spraying assembly 11 located at the outlet pipe 3 directly cools the MPP cable protection pipe with cold water. The second ring spraying assembly 9 mixes cold and hot water through the first mixing valve 36 to obtain primary mixed water for cooling the MPP cable protection pipe. The third ring spraying assembly 10 mixes the primary mixed water with cold water through the second mixing valve 37 to obtain secondary mixed water for cooling the MPP cable protection pipe. Thus, the water temperature for cooling in the first ring spraying assembly 8, the second ring spraying assembly 9, the third ring spraying assembly 10, and the fourth ring spraying assembly 11 gradually decreases, realizing the step-by-step cooling of the MPP cable protection pipe and avoiding the situation of rapid cold shrinkage and uneven cooling of the MPP cable protection pipe caused by too large a temperature difference.

[0037] Working principle: The MPP cable protection pipe enters the chassis 1 through the inlet pipe 2, is cooled and its wall thickness is detected in the cooling mechanism 6, then enters the water removal mechanism 7 through the outlet pipe 3, and the water on the outer wall of the MPP cable protection pipe is removed by the water removal mechanism 7;

[0038] The first ring spray assembly 8, the second ring spray assembly 9, the third ring spray assembly 10, and the fourth ring spray assembly 11 are sleeved outside the MPP cable protection pipe, and the water inlet grooves 14 of the annular inner pipe 13 are circularly distributed facing the MPP cable protection pipe. The motor 24 works to drive the rotating gear 25 to rotate, driving the meshing gear ring 21 to rotate. At this time, the annular inner pipe 13 rotates within the annular outer pipe cover 12, and the ring seat 18 and the wind cover 27 also rotate synchronously. The rotation of the annular inner pipe 13 facilitates the uniform spraying of cooling water through the spray holes 15 on the outside of the MPP cable protection pipe, achieving uniform cooling of the MPP cable protection pipe. The rotation of the ring seat 18 comprehensively monitors the wall thickness of the MPP cable protection pipe before cooling through the first electromagnetic ultrasonic sensor 19. The rotation of the gear ring 21 comprehensively monitors the wall thickness of the MPP cable protection pipe after cooling through the second electromagnetic ultrasonic sensor 22. The rotation of the wind cover 27 facilitates the uniform spraying of wind through the wind holes 29 on the outer wall of the MPP cable protection pipe, blowing off the water on the outer wall of the MPP cable protection pipe;

[0039] Hot water enters the first three-way valve 34 through the hot water pipe 39. At this time, a part of the hot water enters the first ring spray assembly 8, and another part of the hot water enters the second three-way valve 35. At the same time, cold water enters the fourth ring spray assembly 11, the second three-way valve 35, and the second mixing valve 37 respectively through the cold water pipe 40 and the third three-way valve 38. The cold and hot water is subjected to primary mixing and cooling in the second three-way valve 35 and then enters the second ring spray assembly 9 and the second mixing valve 37 through the first mixing valve 36. After secondary mixing and cooling with cold water in the second mixing valve 37, it enters the third ring spray assembly 10. At this time, the water temperature entering the first ring spray assembly 8, the second ring spray assembly 9, the third ring spray assembly 10, and the fourth ring spray assembly 11 gradually decreases, achieving gradual cooling of the MPP cable protection pipe.

[0040] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, should be covered within the protection scope of the present invention.

Claims

1. A cooling device for MPP cable protection tube after extrusion, characterized in that: The machine comprises a chassis (1), wherein two ends of the chassis (1) are respectively provided with a pipe inlet (2) and a pipe outlet (3), a cooling mechanism (6) is installed inside the chassis (1), a drainage mechanism (7) is installed outside the pipe outlet (3) of the chassis (1), and a collecting trough (4) is provided on the bottom side of the chassis (1), and the collecting trough (4) is connected to a drainage pipe (5); The dewatering mechanism (7) comprises a first annular spray assembly (8), a second annular spray assembly (9), a third annular spray assembly (10) and a fourth annular spray assembly (11) which are arranged at equal intervals in the chassis (1) and spray the MPP cable protection tube. The temperature of cooling water sprayed by the first annular spray assembly (8), the second annular spray assembly (9), the third annular spray assembly (10) and the fourth annular spray assembly (11) decreases step by step. The first annular spray assembly (8), the second annular spray assembly (9), the third annular spray assembly (10) and the fourth annular spray assembly (11) all comprise an annular outer pipe cover (12) fixedly connected to the top side of the inner wall of the chassis (1) and an annular inner pipe (13) rotating around the MPP cable protection tube. The annular inner pipe (13) is installed inside the annular outer pipe cover (12) via a sealing ring. A water inlet groove (14) communicating with the annular outer pipe cover (12) is provided on the outer side of the annular inner pipe (13). A plurality of spray holes (15) are provided on the inner side of the annular inner pipe (13) at equal angles. Adjacent annular outer tube covers (12) are connected via a plurality of first connecting arms (16); the side wall of the annular inner tube (13) of the first annular spray assembly (8) is connected to an annular seat (18) via a plurality of second connecting arms (17); a plurality of first electromagnetic ultrasonic sensors (19) are mounted at equal angles on the outer side of the annular seat (18); and the annular seat (18) is connected to the inner wall of the chassis (1) via a bearing; The side wall of the annular inner tube (13) of the fourth annular spray assembly (11) is connected to the gear ring (21) via a plurality of third connecting arms (20), and a plurality of second electromagnetic ultrasonic sensors (22) are installed at equal angles on the outer side of the gear ring (21); A mounting plate (23) is mounted on the inner wall of the chassis (1), a motor (24) is mounted on the mounting plate (23), a rotating tooth (25) is mounted on the output end of the motor (24), and the rotating tooth (25) is meshed with the gear ring (21); The dewatering mechanism (7) comprises a trumpet-shaped wind shield (27), and the inner wall of the wind shield (27) is connected to the gear ring (21) via a plurality of fourth connecting arms (26), the wind shield (27) is connected to the pipe outlet (3) via a bearing, an air cavity (28) is provided inside the wind shield (27), and a plurality of air holes (29) inclined toward the pipe outlet (3) are provided on the inner wall of the wind shield (27); A sealing ring (31) is installed on the outside of the chassis (1) via a support arm (30); the sealing ring (31) is installed on the outside of the wind cover (27) via a sealing pad; and an air duct (32) connected to the air cavity (28) is installed on the sealing ring (31); A water inlet pipe (33) is installed on the side walls of the plurality of annular outer pipe covers (12); the water inlet pipe (33) of the first annular spray assembly (8) is connected to a first three-way valve (34), and the first three-way valve (34) is connected to a hot water pipe (39); The water inlet pipe (33) of the second ring spray assembly (9) is in communication with the first water mixing valve (36), and the first water mixing valve (36) is in communication with the second three-way valve (35), and the second three-way valve (35) is in communication with the first three-way valve (34) via a pipeline; The water inlet pipe (33) of the third ring spray assembly (10) is connected to the second water mixing valve (37), and the second water mixing valve (37) is connected to the first water mixing valve (36) through a pipeline; The water inlet pipe (33) of the fourth ring spray assembly (11) is connected to the third three-way valve (38), the third three-way valve (38) is connected to the cold water pipe (40), and the third three-way valve (38) is connected to the second three-way valve (35) and the second water mixing valve (37) through pipelines.

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