CN115059338A

CN115059338A - Power line single tower with central connection structure

Info

Publication number: CN115059338A
Application number: CN202210862117.5A
Authority: CN
Inventors: 朱鸿钧
Original assignee: Jiangsu Tianli Steel Structure Co ltd
Current assignee: Jiangsu Tianli Steel Structure Co ltd
Priority date: 2022-07-20
Filing date: 2022-07-20
Publication date: 2022-09-16
Anticipated expiration: 2042-07-20
Also published as: CN115059338B

Abstract

The invention discloses a power line single tower with a central connection structure, which comprises a lower tower and an upper tower, wherein the upper end of the lower tower is provided with a lower flange, and the lower end of the upper tower is provided with an upper flange matched with the lower flange: a lower core column which is coaxial with the lower pole tower is also arranged in the lower pole tower, and an inner ring groove is arranged at the upper end of the lower core column; an upper core column which is coaxial with the upper pole tower is arranged in the upper pole tower, and the lower end of the upper core column is provided with at least three axial grooves and a convex ring matched with the inner ring groove; an inner support block capable of axially sliding is arranged in the upper core column; when lower flange is in the dock state with last flange, the bulge loop card is gone into to the inner ring inslot inside, and interior support piece locks the bulge loop in the inner ring inslot. The invention improves the strength of the whole tower by arranging the core column in the tower. After the upper pole tower and the lower pole tower are butted, the upper core column and the lower core column can be connected, and the connection strength of the connection position of the pole towers is ensured.

Description

Power line single tower with central connection structure

Technical Field

The invention relates to the technical field of power line single-pole towers, in particular to a power line single-pole tower with a central connection structure.

Background

The single pole tower is the most commonly used cable support on the high-voltage transmission line. According to the position and the function of the tower in the line, the single-pole tower comprises a straight pole, branch poles, tension poles, crossing poles and the like.

With the lifting of the manufacturing process and the lifting of the line transmission requirement, the conventional cement towers are eliminated, and in practical application, most of the conventional cement towers are made of steel. For a conventional steel single tower, a rectangular steel plate is usually bent for multiple times and then welded in the manufacturing process, so that the section of the steel single tower is usually designed into a regular polygon, and the steel single tower is called as a hollow single tower. For some towers with higher bearing capacity requirements, the strength and the application range of the tower need to be improved by reinforcing the internal structure of the tower, for example, the publication number "CN 104047462B" discloses a high-strength steel transmission tower with a honeycomb structure, and obviously, the strength of the tower with the honeycomb structure in the section is far higher than that of the hollow single tower.

The tower is limited by a manufacturing process (the length of bending equipment is limited) and transportation and installation, the existing tower is usually designed in a sectional mode in the production process, namely the tower is designed into two ends or even three sections, and when the tower needs to be used, the tower is assembled in an assembling mode. If the strength of the tower joint cannot be guaranteed, it is meaningless to only improve the strength of the single-section tower, and the high-strength steel transmission tower with the honeycomb structure disclosed in the patent "CN 104047462B" is also connected by the existing flange, so that the inner honeycomb structure is not connected at the flange joint, and a dangerous section is possibly formed. On the other hand, when the shaft tower is installed, not assemble whole shaft tower earlier and erect the shaft tower again, but from the bottom up installs multistage shaft tower (two sections usually) in proper order, when the shaft tower of good bottom is installed, also be the difficult point of whole shaft tower installation to the butt joint process of upper end shaft tower and lower extreme shaft tower, if only adopt conventional flange joint, the problem of accurate butt joint needs to be considered on the one hand, on the other hand also need consider whether this kind of connected mode can satisfy the intensity requirement of whole shaft tower, especially have additional strengthening's single shaft tower of power line to pole core inside.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides the power line single tower with the central connection structure.

In order to achieve the above purpose, the invention adopts the following technical scheme:

the utility model provides a take central connection structure's electric power circuit single tower, includes lower shaft tower, goes up the shaft tower, and the upper end of lower shaft tower is equipped with the lower flange, and the lower extreme of going up the shaft tower is equipped with and goes up the flange with lower flange assorted: a lower core column which is coaxial with the lower pole tower is also arranged in the lower pole tower, and an inner ring groove is formed in the upper end of the lower core column;

an upper core column which is coaxial with the upper pole tower is arranged in the upper pole tower, and the lower end of the upper core column is provided with at least three axial grooves and a convex ring matched with the inner ring groove;

an inner support block capable of axially sliding is arranged in the upper core column;

when lower flange is in the dock state with last flange, the bulge loop card is gone into to the inner ring inslot inside, and interior support piece locks the bulge loop in the inner ring inslot.

Preferably, the power line single tower with the central connection structure comprises: when lower shaft tower and last shaft tower are in the butt joint state, interior support piece locks in the upper end of bulge loop, and the bulge loop can extend to the state that breaks away from with inner ring groove to shaft tower central point.

Preferably, the power line single tower with the central connection structure comprises: the locking device also comprises a locking disc, wherein the side part of the inner supporting block is provided with a side bulge which can slide in the axial groove, and the side bulge extends out of the outer side surface of the upper core column in the radial direction;

the locking disc is provided with a fan-shaped notch capable of passing through the side bulge;

the locking disc can rotate at a certain angle by taking the axis of the upper tower as the center of a circle;

when the lower flange and the upper flange are in a butt joint state, the locking disc is connected between the lower flange and the upper flange.

Preferably, the power line single tower with the central connection structure comprises: the inner surface of the upper core column is also provided with an inner retainer ring, when the lower flange and the upper flange are in a butt joint state, the lower end of the inner supporting block is connected with the inner retainer ring, and the fan-shaped notch and the side bulge are in a staggered state;

when the lower flange and the upper flange are in an unmatched state, the inner support block is positioned above the locking disc, and the fan-shaped notch and the side bulge are in a staggered state.

Preferably, the power line single tower with the central connection structure comprises: the upper core column is connected with the upper core column through the inner cylinder, the upper core column can slide along the axial direction of the inner cylinder, and the upper part of the upper core column is also connected with a nut sleeve capable of driving the upper core column to slide along the axial direction of the inner cylinder through threads.

Preferably, the power line single tower with the central connection structure comprises: the upper core column comprises a first core column and a second core column which are sequentially arranged from top to bottom, the convex ring is located below the second core column, a threaded sleeve is further arranged above the locking disc, the threaded sleeve is rotatably connected with the second core column, and the threaded sleeve is connected with the first core column through threads.

Preferably, the power line single tower with the central connection structure comprises: an elastic clamping hook is arranged in the inner supporting block in the radial direction, the elastic clamping hook comprises two sliding parts penetrating through the inner supporting block, and a spring used for driving the end part of each sliding part to be connected with the upper core column is arranged between the two sliding parts; a clamping hook is arranged below each of the two sliding parts;

a sliding core rod is arranged at the center of the lower core column, and an inner annular groove matched with the clamping hook is arranged above the sliding core rod;

when the inner supporting block locks the convex ring in the inner annular groove, the clamping hook is combined with the inner annular groove, and the sliding core rod applies downward tension to the inner supporting block.

Preferably, the power line single-pole tower with the central connection structure comprises: the lower core column is connected with the sliding core rod through a sliding core rod fixing plate, a vertical spring for driving the sliding core rod to move downwards is arranged between the sliding core rod and the sliding core rod fixing plate, and the sliding core rod is provided with an elastic pin;

when the lower flange is not in butt joint with the upper flange, the elastic pin is positioned above the sliding core rod fixing plate;

when the lower flange is in a butt joint state with the upper flange, the elastic pin is positioned below the sliding core rod fixing plate.

Preferably, the power line single tower with the central connection structure comprises: the locking disk is provided with a plurality of fan-shaped through holes distributed annularly.

Preferably, the power line single tower with the central connection structure comprises: the locking disc is connected with the bolt through threads, and the upper flange is connected with the bolt through a fan-shaped bolt hole.

The invention achieves the following beneficial effects: compared with the prior art, the invention improves the strength of the whole tower in a mode of arranging the core column in the tower. After the upper pole tower and the lower pole tower are butted, the upper core column and the lower core column can be connected, and the connection strength of the connection position of the pole towers is ensured.

The connection between two upper and lower stem columns need not destroy outside shaft tower lateral wall, has guaranteed the intensity and the integrality of shaft tower, and in practical application, can accomplish the butt joint of stem column one, stem column two automatically after flange and last flange butt joint down, does not need extra operation, has promoted the installation effectiveness.

Drawings

FIG. 1 is an external view of the junction of a lower tower and an upper tower according to the present invention;

FIG. 2 is a top view of the lower tower of the present invention;

FIG. 3 is a view of the sliding core rod of the present invention;

FIG. 4 is a cutaway view of an embodiment of the present invention;

FIG. 5 is a two-part view of an embodiment of the present invention;

FIG. 6 is a bottom structure diagram of a tower according to a third embodiment of the present invention;

FIG. 7 is a first three-section view of the embodiment of the present invention (the lower flange and the upper flange are in an unmated state);

FIG. 8 is an enlarged view of a portion of FIG. 7 at A;

FIG. 9 is a third sectional view of the embodiment of the present invention (the lower flange and the upper flange are in a butt joint state);

FIG. 10 is a first view of the locking disk and inner support block of the present invention (with the lower and upper flanges in an unmated condition);

FIG. 11 shows a second configuration of the locking disk and inner support block of the present invention (with the lower flange in abutting engagement with the upper flange);

the meaning of the reference numerals: 1-lower pole tower; 2, mounting on a tower; 11-a lower flange; 21-an upper flange; 211-sector bolt holes; 22-inner cylinder; 3-a locking disc; 31-a bolt; 32-sector notches; 33-sector-shaped through holes; 331-a thread ring groove; 34-a threaded sleeve; 341-axial web; 4-lower core column; 5-sliding the core rod; 41-radial ribs; 42-ring groove; 43-sliding mandrel fixing plate; 51-a resilient pin; 52-inner snap ring; 53-vertical springs; 6-upper core column; 61-convex ring; 62-axial grooves; 63-inner retainer ring; 64-nut sleeves; 65-core column one; 66-core column two; 7-elastic hook; 71-a slide; 72-an upper drive plate; 711-chute; 73-hook; 8-an inner support block; 81-side projection; 82-fixing hole.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby. For convenience of description, the "upper" and the "lower" in this embodiment refer to orientations of the cable tower in a normal installation state, and the axial direction and the radial direction in this embodiment are also described with respect to the whole tower.

As shown in fig. 1 to 4: the embodiment discloses a power line single tower with a central connection structure, which comprises a lower tower 1 and an upper tower 2, wherein a lower flange 11 is arranged at the upper end of the lower tower 1, and an upper flange 21 matched with the lower flange 11 is arranged at the lower end of the upper tower 2. The lower pole tower 1 is also internally provided with a lower core column 4 which is coaxial with the lower pole tower 1, and the lower core column 4 is welded on the inner wall of the lower pole tower 1 through at least three radial rib plates 41. The upper end of the lower core column 4 is provided with an inner ring groove 42.

An upper core column 6 which is coaxial with the upper pole tower 2 is arranged in the upper pole tower 2, and the two modes between the upper core column 6 and the upper pole tower 2 are the same as the connection mode between the lower core column 4 and the lower pole tower 1. From the above description, it can be seen that, unlike the existing hollow tower, the present embodiment enhances the strength of the whole tower by welding the core column and the plurality of radial ribs 41 inside the tower.

The lower end of the upper core column 6 is provided with at least three axial grooves 62 and a convex ring 61 matching with the inner ring groove 42. The plurality of axial grooves 62 divide the lower end of the upper stem 6 into a plurality of claws, which are bent inward or outward within a certain range, for allowing the male ring 61 to be snapped into the inside of the inner annular groove 42. The outer edge of the lower end of the upper core column 6 is designed to have an oblique angle, and the inner edge of the upper end of the lower core column 4 is designed to have an oblique angle, so that the lower end of the upper core column 6 can contract inwards through the matching of the upper oblique angle and the lower oblique angle, and finally, the effect that the convex ring 61 can be automatically clamped into the inner annular groove 42 is achieved.

Wherein, an inner supporting block 8 which can axially slide is arranged in the upper core column 6; when the lower flange 11 and the upper flange 21 are in a butt joint state, the convex ring 61 is clamped into the inner annular groove 42, the inner support block 8 slides downwards to be filled into the bottom of the upper core column 6, the lower end of the upper core column 6 is supported, the clamping jaws are prevented from moving inwards, and the purpose of locking the convex ring 61 in the inner annular groove 42 is achieved.

When the lower tower 1 and the upper tower 2 are in an undocked state, the protruding ring 61 is ensured to move inward (in the axial direction of the tower), so that the protruding ring 61 can enter the inner annular groove 42. Therefore, in this state, the inner support block 8 is locked to the upper end of the male ring 61 and has a distance in the axial direction such that the male ring 61 can be extended toward the tower center position to a state of being disengaged from the inner ring groove 42.

As shown in fig. 10 and 11, the present embodiment further includes a locking disk 3, and a side protrusion 81 slidable in the axial groove 62 is provided on a side portion of the inner support block 8. The side projections 81 extend in the radial direction out of the outer side surface of the upper stem 6, i.e. the side surfaces of the side projections 81 are higher than the outer surface of the upper stem 6. The locking disk 3 is provided with a scalloped notch 32 that can pass through the side projection 81, and the width of the scalloped notch 32 is greater than the width of the side projection 81 to ensure that the side projection 81 can pass through the scalloped notch 32. The locking disc 3 can rotate at a certain angle by taking the axis of the upper tower 2 as the center of a circle. When the lower flange 11 is in a state of being butted against the upper flange 21, the locking disk 3 is connected between the lower flange 11 and the upper flange 21. Specifically, the locking plate 3 is connected with the bolt 31 through a screw thread, and the upper flange 21 is connected with the bolt 31 through a fan-shaped bolt hole 211. The radian of the fan-shaped bolt hole 211 is not easy to be overlarge, so that the strength of the upper flange 21 is prevented from being excessively reduced.

In order to avoid the separation of the inner support block 8 from the upper core column 6, the inner surface of the upper core column 6 of the present embodiment is further provided with an inner retaining ring 63, when the lower flange 11 and the upper flange 21 are in the butt joint state, the lower end of the inner support block 8 is connected with the inner retaining ring 63, and the sectorial notch 32 and the side protrusion 81 are in the staggered state (fig. 11), so that the inner support block 8 can be always in the support state through the blocking of the locking disk 3.

In some applications, in order to prevent the support block 8 from moving downward when the collar 61 is not engaged with the axial groove 62, the inner support block 8 may be positioned above the locking disk 3 by staggering the scalloped notches 32 and the side protrusions 81 when the lower flange 11 and the upper flange 21 are in an unmated state.

When the lifting device is used, after the lower tower 1 is fixed on a foundation, the upper tower 2 is lifted by the lifting equipment. When the inner supporting block 8 is located at a relatively higher position, the upper tower 2 is placed right above the lower tower 1, and the lower flange 11 and the upper flange 21 are ensured to be in a state of being opposite to each other, so that when the lower end of the upper core column 6 butts against the upper end of the lower core column 4, the convex ring 61 can contract inwards and can be automatically clamped into the inner annular groove 42. The inner support block 8 should then be moved downwards to support the lower end of the upper stem 6 and prevent the collar 61 from separating from the inner groove 42. As can be seen from the above description, in order to realize the connection between the upper core column and the lower core column, firstly, it is to ensure that the inner support block 8 is at a relatively high position when the convex ring 61 enters the inner annular groove 42; secondly, after the protruding ring 61 enters the inner annular groove 42, the inner support block 8 can move downwards to a certain position and support the lower end of the upper core column 6. In this embodiment, the fixing hole 82 is formed at the upper end of the inner support block 8, the inner support block 8 is pulled by a rope or a steel wire, and after the protruding ring 61 enters the inner annular groove 42, the rope or the steel wire is loosened, so that the inner support block 8 falls into the lower end of the upper core column 6 under the action of self weight. Then, the locking disk 3 is driven to rotate by a certain angle by the bolt 31, and when the inner support block 8 falls to a position, the side protrusion 81 can be staggered with the fan-shaped notch 32 in the axial direction, so that the side protrusion 81 does not affect the rotation of the locking disk 3. Therefore, the locking disk 3 has two functions, namely, the inner supporting block 8 is blocked before falling to ensure the normal combination of the convex ring 61 and the axial groove 62, and after the inner supporting block 8 falls, whether the inner supporting block 8 falls in place or not is tested by rotating the locking disk 3, and if the inner supporting block 8 falls in place, the inner supporting block can be locked by rotating the locking disk 3.

After the locking of stem post about realizing through above-mentioned structure, still need guarantee to possess certain pulling force between the stem post about, otherwise, the effect that whole root shaft tower can not also not strengthened to stem post about, for solving this problem, still possess following structure between stem post 6 and the last shaft tower 2 on this embodiment: the upper pole tower 2 is internally connected with an upper core column 6 through an inner cylinder 22, the upper core column 6 can axially slide along the inner cylinder 22, and a nut sleeve 64 which can drive the upper core column 6 to axially slide along the inner cylinder 22 is further connected above the upper core column 6 through a screw thread. When the mountain stems are joined, the tensile force between the two stems can be increased by tightening the nut sleeve 64. After the stem is locked, the lower flange 11 and the upper flange 21 are finally fixed through bolts.

Example two

As shown in fig. 5: the difference between this embodiment and the first embodiment is that the tightening manner between the upper core column and the lower core column is different, the upper core column 6 of this embodiment adopts a sectional design, specifically includes a first core column 65 and a second core column 66 arranged in sequence from top to bottom, and the convex ring 61 is located below the second core column 66. A threaded sleeve 34 is also arranged above the locking disk 3 and is connected with the locking disk by an axial connecting plate 341. The lower end of the threaded sleeve 34 is rotatably connected with the second core column 66 through a threaded sleeve groove 331, and the upper end of the threaded sleeve is connected with the first core column 65 through threads. After the two core columns are clamped, the first core column 65 and the second core column 66 can be fastened by rotating the locking disc 3. However, due to the limited angle of rotation of the locking disc 3, the pitch of the thread between the threaded sleeve 34 and the first core column 65 should be relatively large, or the machining accuracy, in particular the axial machining accuracy, between the core column and the upper tower 2 should be reduced as much as possible. In the present embodiment, the locking disk 3 is provided with a plurality of circular sector-shaped through holes 33, and the circular sector-shaped through holes 33 divide the locking disk 3 into a plurality of webs, which has the advantage that a certain amount of axial elasticity can be provided between the central position (at the sector-shaped notches 32) and the outer edge position (at the lower flange 11 and the upper flange 21) of the locking disk 3, so as to compensate for manufacturing errors and axial displacement of the threaded sleeve 34 when the locking disk 3 rotates.

EXAMPLE III

With reference to fig. 6 to 9: the two embodiments have a great problem, that is, after the lower tower 1 and the upper tower 2 are butted, and after the convex ring 61 is clamped with the axial groove 62, the inner support block 8 is difficult to solve if the inner support block cannot fall normally due to clamping stagnation, in this state, the inner support block 8 is usually required to be driven downwards from the upper part of the upper tower 2, and in the actual installation, because the height of the tower is higher, the actual operation is difficult, and in order to avoid reducing the strength of the tower, the holes are not formed in the side part of the tower in the embodiment.

In order to solve the problems of the two embodiments, in the present embodiment, the inner supporting block 8 is provided with a radially arranged elastic hook 7, the elastic hook 7 includes two sliding parts 71 penetrating through the inner supporting block 8, a spring for driving the end of the sliding part 71 to connect the inner surface of the upper core column 6 is arranged between the two sliding parts 71, and the elasticity of the spring enables the end of the sliding part 71 to abut against the inner surface of the upper core column 6, so that the inner supporting block 8 can stay at a certain height in the upper core column 6. A clamping hook 73 is arranged below each sliding piece 71; the hooks 73 are arranged opposite to each other. A sliding core rod 5 is arranged at the center of the lower core column 4, and an inner annular groove 42 (fig. 3) matched with the clamping hook 73 is arranged above the sliding core rod 5; when the inner support block 8 locks the male ring 61 to the inner annular groove 42, the hook 73 engages with the inner annular groove 42, and the sliding mandrel 5 applies a downward pulling force to the inner support block 8. The lower end of the hook 73 is a slope that allows the hook 73 to enter the inside of the inner annular groove 42.

Specifically, the method comprises the following steps: the lower core column 4 is connected with a sliding core rod 5 through a sliding core rod fixing plate 43, a vertical spring 53 for driving the sliding core rod 5 to move downwards is arranged between the sliding core rod 5 and the sliding core rod fixing plate 43, and the sliding core rod 5 is provided with an elastic pin 51; when the lower flange 11 is not abutted to the upper flange 21, the elastic pin 51 is located above the sliding core fixing plate 43, and the elastic pin 51 prevents the vertical spring 53 from driving the sliding core 5 to move downward by an elastic force, so that the sliding core 5 is in a state of being capable of being combined with the hook 73.

When the lower flange 11 is about to be butted against the upper flange 21, the hook 73 is caught inside the inner annular groove 42, and since the inner annular groove 42 reduces the distance between the two sliding members 71, the end of the sliding member 71 is disengaged from the inner surface of the upper stem 6 or the pressure is reduced. When the distance between the lower flange 11 and the upper flange 21 is further reduced, the hook 73 pushes the sliding core rod 5 downwards and compresses the elastic pin 51, and when the elastic pin 51 passes through the sliding core rod fixing plate 43, the vertical spring 53 pulls the inner supporting block 8 to move downwards through the elastic hook 7, so that the inner supporting block 8 can be ensured to move downwards to a corresponding position to a certain extent.

In practical application, the inner support block 8 and the upper core column 6 should be as smooth as possible, have no burrs, edges and corners, and the like, and preferably have a clearance fit relationship with the upper core column 6, so as to ensure the normal falling of the inner support block 8 in the upper core column 6.

Because the difficulty of the hook 73 entering the inner ring groove 42 is high (the hook and the inner ring groove are small in size and not easy to align) during actual assembly, the lower flange 11 and the upper flange 21 can be guided and aligned through an external guide structure in the prior art.

Compared with the prior art, the invention improves the strength of the whole tower in a mode of arranging the core column in the tower. After the upper pole tower and the lower pole tower are butted, the upper core column and the lower core column can be connected, and the connection strength of the connection position of the pole towers is ensured.

The connection between two upper and lower stem columns need not destroy outside shaft tower lateral wall, has guaranteed the intensity and the integrality of shaft tower, and in practical application, can accomplish the butt joint of stem column one 65, two 66 of stem column automatically after lower flange 11 docks with last flange 21, does not need extra operation (interior supporting shoe 8 does not take place the jamming).

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a take central connection structure's single shaft tower of power line, includes lower shaft tower (1), goes up shaft tower (2), the upper end of lower shaft tower (1) is equipped with lower flange (11), the lower extreme of going up shaft tower (2) be equipped with lower flange (11) assorted upper flange (21), its characterized in that: a lower core column (4) which is coaxial with the lower tower (1) is further arranged inside the lower tower (1), and an inner annular groove (42) is formed in the upper end of the lower core column (4);

an upper core column (6) which is coaxial with the upper tower (2) is arranged in the upper tower (2), and the lower end of the upper core column (6) is provided with at least three axial grooves (62) and a convex ring (61) matched with the inner ring groove (42);

an inner support block (8) capable of axially sliding is arranged in the upper core column (6);

when the lower flange (11) and the upper flange (21) are in a butt joint state, the convex ring (61) is clamped into the inner ring groove (42), and the inner support block (8) locks the convex ring (61) in the inner ring groove (42).

2. The electric power line single-pole tower with the central connection structure as claimed in claim 1, wherein: when the lower tower (1) and the upper tower (2) are in an undocked state, the inner supporting block (8) is locked at the upper end of the convex ring (61), and the convex ring (61) can extend to a state of being separated from the inner ring groove (42) towards the center position of the tower.

3. The electric power line single tower with the central connection structure as claimed in claim 1 or 2, wherein: the locking device further comprises a locking disc (3), a side part of the inner supporting block (8) is provided with a side protrusion (81) capable of sliding in the axial groove (62), and the side protrusion (81) extends out of the outer side surface of the upper core column (6) in the radial direction;

the locking disc (3) is provided with a fan-shaped notch (32) which can pass through the side protrusion (81);

the locking disc (3) can rotate at a certain angle by taking the axis of the upper tower (2) as the center of a circle;

when the lower flange (11) and the upper flange (21) are in a butt joint state, the locking disc (3) is connected between the lower flange (11) and the upper flange (21).

4. The electric power line single-pole tower with the central connection structure as claimed in claim 3, wherein: the inner surface of the upper core column (6) is also provided with an inner retainer ring (63), when the lower flange (11) and the upper flange (21) are in a butt joint state, the lower end of the inner supporting block (8) is connected with the inner retainer ring (63), and the fan-shaped notch (32) and the side protrusion (81) are in a staggered state;

when the lower flange (11) and the upper flange (21) are in an unmated state, the inner supporting block (8) is located above the locking disc (3), and the sector-shaped notch (32) and the side protrusion (81) are in a staggered state.

5. The electric power line single-pole tower with the central connection structure as claimed in claim 4, wherein: go up in shaft tower (2) and connect upper core post (6) through inner tube (22), upper core post (6) can be followed inner tube (22) axial slip, the top of upper core post (6) still can drive upper core post (6) along nut cover (64) of inner tube (22) axial slip through threaded connection.

6. The electric power line single-pole tower with the central connection structure as claimed in claim 4, wherein: go up stem (6) including stem one (65), the second (66) of stem that from the top down arranged in proper order, bulge loop (61) are located the below of stem two (66), the top of locking dish (3) still is equipped with thread bush (34), but thread bush (34) swivelling joint stem two (66), and thread bush (34) are through threaded connection stem one (65).

7. The electric power line single-pole tower with the central connection structure as claimed in claim 4, wherein: an elastic clamping hook (7) arranged in the radial direction is arranged in the inner supporting block (8), the elastic clamping hook (7) comprises two sliding parts (71) penetrating through the inner supporting block (8), and a spring used for driving the end part of each sliding part (71) to be connected with the upper core column (6) is arranged between the two sliding parts (71); a clamping hook (73) is arranged below each sliding piece (71);

a sliding core rod (5) is arranged at the center of the lower core column (4), and an inner annular groove (42) matched with the clamping hook (73) is arranged above the sliding core rod (5);

when the inner supporting block (8) locks the convex ring (61) on the inner annular groove (42), the clamping hook (73) is combined with the inner annular groove (42), and the sliding core rod (5) applies downward pulling force to the inner supporting block (8).

8. The electric power line single-pole tower with the central connection structure as claimed in claim 7, wherein: the lower core column (4) is connected with a sliding core rod (5) through a sliding core rod fixing plate (43), a vertical spring (53) for driving the sliding core rod (5) to move downwards is arranged between the sliding core rod (5) and the sliding core rod fixing plate (43), and the sliding core rod (5) is provided with an elastic pin (51);

when the lower flange (11) is not in butt joint with the upper flange (21), the elastic pin (51) is positioned above the sliding core rod fixing plate (43);

when the lower flange (11) is in butt joint with the upper flange (21), the elastic pin (51) is positioned below the sliding core rod fixing plate (43).

9. The electric power line single tower with the central connection structure as claimed in any one of claims 4 to 8, wherein: the locking disc (3) is provided with a plurality of annularly distributed fan-shaped through holes (33).

10. The electric power line single tower with the central connection structure as claimed in any one of claims 4 to 8, wherein: the locking disc (3) is connected with the bolts (31) through threads, and the upper flange (21) is connected with the bolts (31) through fan-shaped bolt holes (211).