A composite insulating pole

Abstract

The present invention discloses a composite insulating pole, comprising an insulating shell, an air duct structure and a drainage structure. The insulating shell comprises an inner insulating cylinder, an outer insulating cylinder and a top cover. The drainage structure comprises a drainage surface, a water collecting trough and a drainage channel. The air duct structure between the outer insulating cylinder and the inner insulating cylinder is utilized so that condensation condensed on the outer wall of the inner insulating cylinder is evaporated by heat, and then condenses on the drainage surface of the inner wall of the top cover as the hot air rises. The condensation on the drainage surface is then collected by the water collecting trough, and finally the condensation is discharged from top to bottom to the outside of the outer insulating cylinder through the drainage channel. The advantage of such a design is that when the fixed pole is working, the water vapor entering the insulating shell will be quickly discharged outside the insulating shell along with the air duct structure, or condensed on the drainage surface and quickly discharged outside the insulating shell along with the drainage structure, thereby avoiding the electrical components in the inner insulating cylinder from being affected by water vapor and causing creepage problems, thereby improving the safety and reliability of product use.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum circuit breakers, and in particular to a composite insulating pole. Background Art

[0002] A composite insulated pole is formed by embedding the vacuum interrupter and the conductive parts related to the circuit breaker into an easily curable solid insulating material such as epoxy resin. After the vacuum interrupter is embedded in the solid material, the impact of the external environment of the pole on the vacuum interrupter is reduced to a minimum, greatly improving the insulation strength of the vacuum switch.

[0003] Chinese patent document CN108257815A discloses a bidirectional insulating rod anti-condensation composite insulated pole for vacuum switchgear. It comprises an insulating cylinder with a vacuum interrupter sealed within its front section, a static contact disposed at the front of the vacuum interrupter and a moving contact disposed at the rear. An insulating pull rod connected to the moving contact of the vacuum interrupter is disposed within the rear cavity of the insulating cylinder, with the rear end of the insulating pull rod extending from an opening at the rear end of the insulating cylinder. The insulating pull rod comprises an insulator located in the middle section and connecting inserts at both ends of the insulator. An annular flexible sealing gasket is connected between the insulating pull rod and the insulating cylinder. The outer and inner rings of the flexible sealing gasket are respectively compressed and sealed to the rear end faces of the insulating cylinder and the insulator via a fixing flange and a gasket.

[0004] However, this composite insulated pole has the following problems in actual use:

[0005] 1. The anti-condensation function of the composite insulated pole is to shield the insulating cylinder and the rear end face of the insulator through a flexible sealing gasket, so that water vapor will not enter the interior of the insulating cylinder, thereby avoiding condensation inside the insulating cylinder. However, when this composite insulated pole is used for a long time or in a harsh environment or an environment with a large number of small animals, the flexible sealing gasket will age and crack, causing the sealing structure to fail. Once water vapor enters the insulating cylinder, it cannot be easily discharged, resulting in excessive condensation accumulating on the inner wall of the insulating cylinder, which is prone to creepage or even breakdown of the internal insulation. The risk resistance is poor and there are major safety hazards. Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the problem in the prior art that when water vapor enters the interior of a composite insulated pole, the water vapor cannot be quickly discharged, causing the water vapor to condense into condensation on the inner wall. When too much condensation accumulates, the composite insulated pole is prone to creepage problems, thereby providing a composite insulated pole that can quickly drain water vapor from the insulating shell, reduce condensation accumulation, and avoid creepage problems.

[0007] The present invention provides a composite insulating pole, comprising:

[0008] The insulating shell comprises an inner insulating cylinder, an outer insulating cylinder, and a top cover arranged on the top of the outer insulating cylinder;

[0009] An air duct structure is provided between the outer insulating cylinder and the inner insulating cylinder and extends axially along the insulating shell, and is radially penetrated on the top of the outer insulating cylinder or the side wall of the top cover. When the temperature inside the insulating shell rises, the water vapor inside the insulating shell moves upward along the air duct structure.

[0010] The drainage structure includes a drainage surface with a bowl-shaped opening facing the air duct structure and arranged on the inner side of the top cover, and a water collection groove arranged at the bottom edge of the drainage surface. The rising water vapor condenses into condensation on the drainage surface and flows into the water collection groove along the drainage surface. The drainage structure also includes a drainage channel that is arranged between the water collection groove and the outer insulating tube. The drainage channel extends to the bottom of the outer insulating tube and is used to discharge the condensation in the water collection groove from top to bottom to the outside of the outer insulating tube.

[0011] In the composite insulated pole described above, the air duct structure includes: an air guide channel arranged axially along the insulating shell between the outer insulating cylinder and the inner insulating cylinder, and an exhaust channel arranged radially through the insulating shell on the top of the outer insulating cylinder or the side wall of the top cover, the exhaust channel being connected to the upper end of the air guide channel.

[0012] In the composite insulated pole, the air guide channel has a ring-shaped cross section, a bottom plate is installed at the bottom of the outer insulating cylinder, and a plurality of air inlet holes communicating with the lower end of the air guide channel are provided on the bottom plate;

[0013] The exhaust passage includes a plurality of air outlet holes arranged at annular intervals on the top of the outer insulating cylinder or the side wall of the top cover.

[0014] In the above-mentioned composite insulated pole, the drainage channel includes a drainage pipe arranged on the outer insulating tube along the axial direction of the outer insulating tube, a guide pipe integrally formed at the bottom of the water collecting tank for insertion into the drainage pipe, and a first drain pipe arranged on the bottom plate corresponding to the drainage pipe.

[0015] In the above-mentioned composite insulated pole, a spiral drainage groove is provided on the inner wall of the outer insulating tube along the air guide channel, and multiple reinforcing ribs are arranged at intervals along the circumferential direction between the outer insulating tube and the inner insulating tube, and the drainage groove passes through multiple reinforcing ribs respectively.

[0016] In the above-mentioned composite insulated pole, a drainage structure is provided between the outer insulating tube and the bottom plate for draining condensation on the drainage groove out of the outer insulating tube. The drainage structure includes a drainage oblique block arranged below the drainage groove and inclined toward the bottom of the outer insulating tube, an annular water receiving groove arranged on the bottom plate and opposite to the edge of the drainage oblique block, and a second drainage pipe formed at the bottom of the water receiving groove.

[0017] In the above-mentioned composite insulated pole, the drainage oblique block is arc-shaped, the outer insulating tube is provided with a plurality of first sheds at intervals below the drainage oblique block, the bottom of the inner insulating tube is provided with second sheds staggered with the first sheds, and the edge of the drainage oblique block is located between the first sheds and the second sheds.

[0018] In the composite insulated pole, the bottom plate is provided with a corrugated heat dissipation groove inside the water receiving groove, and the air inlet holes are spaced apart at the crests of the corrugated heat dissipation groove and spaced around the outer ring of the water receiving groove.

[0019] In the above-mentioned composite insulated pole, the top cover also includes an inner convex ring extending from the bottom of the water collecting tank and fitting against the inner wall of the outer insulating tube, and an outer convex ring arranged concentrically with the inner convex ring and fitting against the outer wall of the outer insulating tube.

[0020] In the above-mentioned composite insulated pole, a clamping structure is provided between the outer convex ring and the outer insulating tube. The clamping structure includes a clamping groove provided on the outer convex ring and a clamping protrusion provided on the outer wall of the outer insulating tube corresponding to the clamping groove. When the top cover is fixed on the outer insulating tube, the clamping protrusion is clamped and fixed in the clamping groove.

[0021] The technical solution of the present invention has the following advantages over the prior art:

[0022] 1. The composite insulated pole provided by the present invention, by arranging inner and outer insulating tubes, ensures that the vacuum interrupter fixed by glue in the inner insulating tube will not be in direct contact with the air in the insulating shell, thereby preventing water vapor from condensing on the vacuum interrupter. At the same time, the air duct structure between the outer insulating tube and the inner insulating tube is utilized so that the condensation condensed on the outer wall of the inner insulating tube is evaporated by heat, and then condensed on the drainage surface of the inner wall of the top cover with the rising hot air, and then the condensation on the drainage surface is collected by the water collecting trough, and finally the condensation is discharged from top to bottom to the outside of the outer insulating tube through the drainage channel. The advantage of this design is that when the fixed pole is working, the water vapor entering the insulating shell will be quickly discharged outside the insulating shell along with the air duct structure, or condensed on the drainage surface and quickly discharged outside the insulating shell along with the drainage structure, thereby avoiding the electrical components in the inner insulating tube from being affected by water vapor and causing creepage problems, thereby improving the safety and reliability of product use.

[0023] 2. The composite insulated pole provided by the present invention has air inlet holes provided on the bottom and on the side walls of the top cover, so that water vapor enters the air guide channel through the air inlet holes, rises along the air guide channel and is discharged from the air outlet holes. At the same time, the air inlet holes and the air outlet holes are small holes arranged in a certain regular pattern, which can effectively prevent small animals from entering the interior of the insulating shell through the air inlet holes and the air outlet holes, thereby improving the safety of the product when used outdoors.

[0024] 3. The composite insulated pole provided by the present invention utilizes the cooperation of the guide tube and the drainage tube to ensure that the condensation in the water collecting tank can flow into the drainage tube and will not flow back into the insulating shell. The condensation in the drainage tube is then discharged outside the insulating shell through the first drain pipe to avoid condensation accumulation in the drainage tube.

[0025] 4. In the composite insulated pole provided by the present invention, a spiral drainage groove is provided on the inner wall of the outer insulating tube along the air guide channel. Rising water vapor preferentially condenses into condensation at the drainage groove on the outer insulating tube. The inclined characteristics of the drainage groove thread enable the condensation in the drainage groove to be discharged from top to bottom to a designated location.

[0026] 5. In the composite insulated pole provided by the present invention, a plurality of reinforcing ribs are arranged at intervals along the circumferential direction between the outer insulating tube and the inner insulating tube. The reinforcing ribs and the drainage grooves cooperate to divide the inner wall of the outer insulating tube into multiple insulating blocks, thereby extending the insulation distance and avoiding creepage problems. At the same time, the reinforcing ribs can also transfer the heat dissipated by the inner insulating tube to the outer insulating tube, thereby increasing the heat dissipation area and achieving better heat dissipation effect.

[0027] 6. The composite insulated pole provided by the present invention has a drainage bevel block and a water receiving trough arranged relative to each other in the upper and lower directions, so that the drainage bevel block directly drips the condensation flowing out of the drainage trough into the water receiving trough, and then uses the second drainage pipe of the water receiving trough to discharge it to the outside of the insulating shell, thereby avoiding condensation accumulation and improving the insulation performance of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] Figure 1 A schematic diagram of the structure of the composite insulated pole provided by the present invention;

[0030] Figure 2 A cross-sectional view of the composite insulated pole provided by the present invention;

[0031] Figure 3 for Figure 2 An enlarged schematic diagram of the upper half of the composite insulated pole is shown;

[0032] Figure 4 for Figure 2 An enlarged schematic diagram of the lower half of the composite insulated pole is shown;

[0033] Figure 5 This is a schematic diagram of the structure of the composite insulated pole provided by the present invention with the bottom plate hidden;

[0034] Figure 6 This is a schematic diagram of the structure of the composite insulated pole provided by the present invention with the top cover hidden;

[0035] Figure 7 for Figure 1 A schematic structural diagram of the top cover shown;

[0036] Figure 8 for Figure 1 A schematic structural diagram of the bottom plate shown;

[0037] Description of the accompanying drawings:

[0038] 1-insulating shell; 11-inner insulating tube; 12-outer insulating tube; 13-drainage groove; 14-reinforcement rib; 15-drainage block; 16-first shed; 17-second shed; 18-clamping protrusion;

[0039] 2-top cover; 21-inner convex ring; 22-outer convex ring; 23-clip groove;

[0040] 3- air duct structure; 31- air guide channel; 32- exhaust channel;

[0041] 4-drainage structure; 41-drainage surface; 42-water collecting trough; 43-drainage channel; 44-drainage pipe; 45-diversion pipe; 46-first drain pipe;

[0042] 5- bottom plate; 51- air inlet; 52- water receiving trough; 53- second drain pipe; 54- corrugated heat dissipation trough. DETAILED DESCRIPTION

[0043] The following will clearly and completely describe the technical solutions of the present invention with reference to the accompanying drawings. Obviously, the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be noted that terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicate positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate and simplify the description of the present invention and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific manner. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] 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 broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0046] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0047] Example 1

[0048] The present embodiment will be described in detail below with reference to the accompanying drawings:

[0049] The present invention provides Figure 1-8 A composite insulated pole is shown, comprising:

[0050] The insulating shell 1 includes an inner insulating cylinder 11 and an outer insulating cylinder 12, and a top cover 2 arranged on the top of the outer insulating cylinder 12;

[0051] An air duct structure 3 extends axially along the insulating housing 1 and is disposed between the outer insulating cylinder 12 and the inner insulating cylinder 11, and radially penetrates the top of the outer insulating cylinder 12 or the side wall of the top cover 2. When the temperature inside the insulating housing 1 rises, the water vapor inside the insulating housing 1 will rise along the air duct structure 3.

[0052] The drainage structure 4 includes a drainage surface 41 with a bowl-shaped opening facing the air duct structure 3 and arranged on the inner side of the top cover 2, and a water collecting trough 42 arranged at the bottom edge of the drainage surface 41. The rising water vapor condenses into condensation on the drainage surface 41 and flows into the water collecting trough 42 along the drainage surface 41. It also includes a drainage channel 43 that is arranged between the water collecting trough 42 and the outer insulating tube 12. The drainage channel 43 extends to the bottom of the outer insulating tube 12 and is used to discharge the condensation in the water collecting trough 42 from top to bottom to the outside of the outer insulating tube 12.

[0053] The above-mentioned implementation mode is the core technical solution of this embodiment. By providing inner and outer insulating tubes 12, the vacuum interrupter fixed by glue in the inner insulating tube 11 will not be in direct contact with the air in the insulating shell 1, thereby preventing water vapor from condensing on the vacuum interrupter. At the same time, the air duct structure 3 between the outer insulating tube 12 and the inner insulating tube 11 is used to evaporate the condensation on the outer wall of the inner insulating tube 11 due to heat, and then condense on the drainage surface 41 of the inner wall of the top cover 2 as the hot air rises. The condensation on the drainage surface 41 is then collected by the water collecting trough 42, and finally the condensation is discharged from top to bottom to the outside of the outer insulating tube 12 through the drainage channel 43. The advantage of this design is that when the fixed pole is working, the water vapor entering the insulating shell 1 will be quickly discharged to the outside of the insulating shell 1 along with the air duct structure 3, or condensed on the drainage surface 41 and quickly discharged to the outside of the insulating shell 1 along with the drainage structure 4, thereby preventing the electrical components in the inner insulating tube 11 from being affected by water vapor and causing creepage problems, thereby improving the safety and reliability of product use.

[0054] The following combination Figure 3-5 The setting of the air duct structure 3 is described in detail:

[0055] The air duct structure 3 includes: an air guide channel 31 axially arranged between the outer insulating tube 12 and the inner insulating tube 11 along the insulating shell 1, and an exhaust channel 32 radially penetrating the insulating shell 1 and arranged on the top of the outer insulating tube 12 or the side wall of the top cover 2, the exhaust channel 32 is connected to the upper end of the air guide channel 31, and according to the principle of upper and lower air convection, hot air will rise with the air guide channel 31 and be discharged to the outside of the insulating shell 1 from the exhaust channel 32, so that most of the water vapor is directly discharged from the outside of the insulating shell 1, and only a small part will remain on the top cover 2. It is further provided that the air guide channel 31 is The cross section is ring-shaped, and a bottom plate 5 is installed at the bottom of the outer insulating tube 12. The bottom plate 5 is provided with a plurality of air inlet holes 51 connected to the lower end of the air guide channel 31; the exhaust channel 32 includes a plurality of air outlet holes arranged at annular intervals on the top of the outer insulating tube 12 or the side wall of the top cover 2. Water vapor enters the air guide channel 31 from the air inlet holes 51, rises along the air guide channel 31 and is discharged from the air outlet holes. At the same time, the air inlet holes 51 and the air outlet holes are small holes arranged in a certain regular pattern, which can effectively prevent small animals from entering the interior of the insulating shell 1 through the air inlet holes 51 and the air outlet holes, thereby improving the safety of the product when used outdoors.

[0056] As a specific structural setting, the drainage channel 43 includes a drainage pipe 44 arranged on the outer insulating tube 12 along the axial direction of the outer insulating tube 12, and a drainage pipe 45 integrally formed at the bottom of the water collecting tank 42 for inserting into the drainage pipe 44, and a first drain pipe 46 corresponding to the drainage pipe 44 and arranged on the bottom plate 5. The cooperation between the drainage pipe 45 and the drainage pipe 44 ensures that the condensation in the water collecting tank 42 can flow into the drainage pipe 44 and will not flow back into the insulating shell 1. The condensation in the drainage pipe 44 is then discharged outside the insulating shell 1 through the first drain pipe 46 to avoid condensation accumulation in the drainage pipe 44.

[0057] In order to reduce the water vapor inside the insulating shell 1, a spiral drainage groove 13 is provided on the inner wall of the outer insulating tube 12 along the air guide channel 31. The rising water vapor preferentially condenses into condensation at the drainage groove 13 on the outer insulating tube 12. The spiral downward inclination of the drainage groove 13 is utilized to discharge the condensation in the drainage groove 13 from top to bottom to a designated position. A plurality of reinforcing ribs 14 are arranged between the outer insulating tube 12 and the inner insulating tube 11 at intervals along the circumferential direction. The drainage groove 13 passes through a plurality of the reinforcing ribs 14 respectively. The reinforcing ribs 14 and the drainage groove 13 cooperate to divide the inner wall of the outer insulating tube 12 into a plurality of insulating small blocks, thereby extending the insulation distance and avoiding creepage problems. At the same time, the reinforcing ribs 14 can also transfer the heat emitted by the inner insulating tube 11 to the outer insulating tube 12, thereby increasing the heat dissipation area and achieving better heat dissipation effect.

[0058] As a specific structural setting, a drainage structure for discharging condensation on the drainage groove 13 to the outside of the outer insulating tube 12 is provided between the outer insulating tube 12 and the bottom plate 5. The drainage structure includes a drainage oblique block 15 arranged below the drainage groove 13 and inclined toward the bottom of the outer insulating tube 12, and an annular water receiving groove 52 arranged on the bottom plate 5 and opposite to the edge of the drainage oblique block 15, and a second drainage pipe 53 formed at the bottom of the water receiving groove 52. The condensation flowing out of the drainage groove 13 is directly dripped into the water receiving groove 52 through the drainage oblique block 15, and then discharged to the outside of the insulating shell 1 through the second drainage pipe 53 of the water receiving groove 52, avoiding condensation accumulation, thereby improving the insulation performance of the product. It is further provided that the drainage oblique block 15 is arc-shaped, and the outer insulating tube 12 is provided with a plurality of first umbrella skirts 16 at intervals below the drainage oblique block 15, and the bottom of the inner insulating tube 11 is provided with second umbrella skirts 17 staggered with the first umbrella skirts 16. The first shed 16 and the second shed 17 are provided to increase the creepage distance within the insulating housing 1. The edge of the drainage slant block 15 is located between the first shed 16 and the second shed 17, thereby preventing condensation from dripping from the drainage slant block 15 onto the first shed 16 or the second shed 17, thereby improving the safety of the product during use.

[0059] like Figure 8 As shown, the bottom plate 5 is provided with a corrugated heat dissipation groove 54 on the inner ring of the water receiving groove 52, and the air inlet holes 51 are spaced apart at the crests of the corrugated heat dissipation groove 54 and spaced around the outer ring of the water receiving groove 52, so that the splashed condensation is preferentially accumulated in the troughs, thereby reducing the damage of the condensation to the bottom components.

[0060] As a specific structural setting, the top cover 2 also includes an inner convex ring 21 extending from the bottom of the water collecting tank 42 and fitting with the inner wall of the outer insulating tube 12, and an outer convex ring 22 arranged concentrically with the inner convex ring 21 and fitting with the outer wall of the outer insulating tube 12. When the top cover 2 is installed on the outer insulating tube 12, the inner convex ring 21 and the outer convex ring 22 are used to clamp the outer insulating tube 12, which plays a role in rapid installation and positioning. It is further provided that a clamping structure is provided between the outer convex ring 22 and the outer insulating tube 12, and the clamping structure includes a clamping groove 23 arranged on the outer convex ring 22, and a clamping protrusion 18 corresponding to the clamping groove 23 and provided on the outer wall of the outer insulating tube 12. When the top cover 2 is fixed on the outer insulating tube 12, the clamping protrusion 18 is clamped and fixed in the clamping groove 23. The structure is simple and the clamping is convenient.

[0061] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A composite insulated pole, characterized in that ,include: An insulating housing (1) comprises an inner insulating cylinder (11), an outer insulating cylinder (12), and a top cover (2) arranged on top of the outer insulating cylinder (12); An air duct structure (3) is provided between the outer insulating cylinder (12) and the inner insulating cylinder (11) and is axially extended along the insulating shell (1), and is radially penetrated and provided on the top of the outer insulating cylinder (12) or the side wall of the top cover (2). When the internal temperature of the insulating shell (1) rises, water vapor inside the insulating shell (1) moves upward along the air duct structure (3); The drainage structure (4) comprises a drainage surface (41) with a bowl-shaped opening facing the air duct structure (3) and arranged on the inner side of the top cover (2), and a water collecting groove (42) arranged at the bottom edge of the drainage surface (41), wherein rising water vapor condenses into condensation on the drainage surface (41) and flows along the drainage surface (41) into the water collecting groove (42), and further comprises a drainage channel (43) extending between the water collecting groove (42) and the outer insulating tube (12), wherein the drainage channel (43) extends to the bottom of the outer insulating tube (12) and is used to discharge the condensation in the water collecting groove (42) from top to bottom to the outside of the outer insulating tube (12).

2. The composite insulated pole according to claim 1, characterized in that The air duct structure (3) comprises: an air guide channel (31) arranged between the outer insulating cylinder (12) and the inner insulating cylinder (11) along the axial direction of the insulating shell (1), and an air exhaust channel (32) arranged on the top of the outer insulating cylinder (12) or the side wall of the top cover (2) and passing through the insulating shell (1) in a radial direction, wherein the air exhaust channel (32) is connected to the upper end of the air guide channel (31).

3. The composite insulated pole according to claim 2, characterized in that The air guide channel (31) has a ring-shaped cross section, a bottom plate (5) is mounted on the bottom of the outer insulating cylinder (12), and a plurality of air inlet holes (51) communicating with the lower end of the air guide channel (31) are provided on the bottom plate (5); The exhaust passage (32) comprises a plurality of air outlet holes arranged at annular intervals on the top of the outer insulating cylinder (12) or the side wall of the top cover (2).

4. The composite insulated pole according to claim 3, characterized in that The drainage channel (43) comprises a drainage pipe (44) arranged on the outer insulating tube (12) along the axial direction of the outer insulating tube (12), a guide pipe (45) integrally formed at the bottom of the water collecting tank (42) for insertion into the drainage pipe (44), and a first drainage pipe (46) arranged on the bottom plate (5) corresponding to the drainage pipe (44).

5. The composite insulated pole according to claim 3 is characterized in that The inner wall of the outer insulating cylinder (12) is provided with a spiral drainage groove (13) along the air guide channel (31); a plurality of reinforcing ribs (14) are provided at intervals along the circumferential direction between the outer insulating cylinder (12) and the inner insulating cylinder (11); and the drainage groove (13) passes through the plurality of reinforcing ribs (14).

6. The composite insulated pole according to claim 5, characterized in that A drainage structure for draining condensation on the drainage groove (13) out of the outer insulating cylinder (12) is provided between the outer insulating cylinder (12) and the bottom plate (5), the drainage structure comprising a drainage inclined block (15) arranged below the drainage groove (13) and inclined toward the bottom of the outer insulating cylinder (12), an annular water receiving groove (52) arranged on the bottom plate (5) and opposed to the edge of the drainage inclined block (15) in the upper and lower directions, and a second drainage pipe (53) formed at the bottom of the water receiving groove (52).

7. The composite insulated pole according to claim 6, characterized in that The drainage oblique block (15) is in an arc shape; the outer insulating tube (12) is provided with a plurality of first sheds (16) at intervals below the drainage oblique block (15); the bottom of the inner insulating tube (11) is provided with second sheds (17) staggered from the first sheds (16); and the edge of the drainage oblique block (15) is located between the first sheds (16) and the second sheds (17).

8. The composite insulated pole according to claim 6, characterized in that The bottom plate (5) is provided with a corrugated heat dissipation groove (54) on the inner ring of the water receiving groove (52), and the air inlet holes (51) are distributed at intervals at the crests of the corrugated heat dissipation groove (54) and are arranged at intervals around the outer ring of the water receiving groove (52).

9. The composite insulated pole according to any one of claims 1 to 8, characterized in that The top cover (2) further comprises an inner convex ring (21) extending from the bottom of the water collecting tank (42) and abutting against the inner wall of the outer insulating tube (12), and an outer convex ring (22) arranged concentrically with the inner convex ring (21) and abutting against the outer wall of the outer insulating tube (12).

10. The composite insulated pole according to claim 9, characterized in that A clamping structure is provided between the outer convex ring (22) and the outer insulating tube (12), the clamping structure comprising a clamping groove (23) provided on the outer convex ring (22), and a clamping protrusion (18) provided on the outer wall of the outer insulating tube (12) corresponding to the clamping groove (23); when the top cover (2) is fixed on the outer insulating tube (12), the clamping protrusion (18) is clamped and fixed in the clamping groove (23).

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