A double-circuit T-connected steel pipe pole

Abstract

The present invention discloses a double-circuit T-connected steel pipe pole, which belongs to the field of power transmission technology. The steel pipe pole comprises: an upright main pole; a T-connected cross arm installed on the main pole, which is multi-layer and double-sided; and a main line cross arm installed on the main pole, which is arranged on the same layer as the T-connected cross arm, and is distributed in a "T" shape with the T-connected cross arm on the same layer. The present invention is applied to the wiring of a single-break line, and the main line conductor hanging point and the T-connected line conductor hanging point are on the same plane, which reduces the overall height of the pole tower, saves steel, and reduces the project cost.

Description

Technical Field

[0001] The present invention belongs to the technical field of power transmission, and particularly relates to a double-circuit T-connected steel pipe pole. Background Art

[0002] For the power supply inlets of newly built 110 kV substations, most of them are achieved by single-opening or double-opening the nearby 110 kV lines. The conventional design uses a double-circuit double-T tower, and its structure and wiring can refer to the double-circuit double-T-connected steel pipe pole disclosed in the patent document CN105734731B. The tower head layout of the double-circuit double-T tower is complex, the number of conductor and ground wire cross-arms is large, and the tower head size is large. Therefore, it is urgent to develop a new pole type for single-opened lines to simplify the wiring method between the main line to be opened and the T-connected line. Summary of the Invention

[0003] The technical problem solved by the present invention is to provide a double-circuit T-connected steel pipe pole, which is used to simplify the wiring method between the main line to be opened and the T-connected line, so as to meet the electrical requirements of the tower head and reduce the overall height and steel consumption of the pole tower.

[0004] To solve the above technical problem, the present invention adopts the following technical solutions:

[0005] A double-circuit T-connected steel pipe pole, comprising:

[0006] A main pole erected vertically;

[0007] A T-connected cross-arm installed on the main pole, which is distributed in multiple layers on both sides;

[0008] And a main line cross-arm installed on the main pole, which is arranged on the same layer as the T-connected cross-arm and is distributed in a "T" shape with the T-connected cross-arm on the same layer.

[0009] As a further improvement of the above technical solution:

[0010] The end of the main line cross-arm is a hanging point for connecting the main line conductor; the end of the T-connected cross-arm is a hanging point for connecting the T-connected line conductor, and the two hanging points are connected in series through a jumper wire.

[0011] Jumper insulator seats are provided at the ends of the main line cross-arm and the T-connected cross-arm; the jumper insulator seat includes two wing hanging plates, two side hanging plates and two lower hanging plates all provided with through holes; the two wing hanging plates are respectively unfolded on both sides of the top of the cross-arm end; the two side hanging plates protrude laterally in parallel from the cross-arm end; the two lower hanging plates protrude downward in parallel from the bottom of the cross-arm end.

[0012] A ladder is provided on the outer side of the main pole from bottom to top for easy installation and maintenance. The ladder includes a vertically arranged connecting rod fixed to the side wall of the main pole, and tread rods horizontally fixed on both sides of the connecting rod in a staggered manner; the main pole is provided with a side boss, and the connecting rod is close to the side boss in a single or double-row side-by-side manner, and the connecting rod and the side boss are fixedly connected through a connecting piece.

[0013] The main pole is arranged in sections, and the sections of the main pole are connected by insertion.

[0014] The main pole is preferably a 12-sided steel pipe.

[0015] The bottom end of the main pole is fixed to the ground through a flange plate. Several fixing holes are arranged around the flange plate, and reinforcing ribs are arranged between the fixing holes.

[0016] Furthermore, the fixing holes are evenly distributed on the flange plate. The number of fixing holes is 20, and the hole diameter is 80mm.

[0017] The T-junction cross arm is arranged in four layers, and the main line cross arm is arranged in three layers. The main line cross arm is arranged in the same layer as the lower three layers of T-junction cross arms.

[0018] Furthermore, the height of the first layer of T-junction cross arm is 15m, the distance between the second layer of T-junction cross arm and the first layer of T-junction cross arm is 3.5m, the distance between the third layer of T-junction cross arm and the second layer of T-junction cross arm is 3.5m, and the distance between the fourth layer of T-junction cross arm and the third layer of T-junction cross arm is 2m.

[0019] Compared with the prior art, the advantages of the present invention are:

[0020] 1. The hanging points of the main line conductors and the hanging points of the T-junction line conductors are on the same plane, reducing the overall height of the tower, saving steel, and reducing the project cost.

[0021] 2. Compared with the conventional design, the loads of the conductors and ground wires are reduced, the load borne by the tower is reduced, the weight of the tower is reduced, and the steel consumption of the supporting foundation and the usage amount of concrete are also correspondingly reduced under the same geological conditions.

[0022] 3. The number of opened lines is reduced, the construction workload is greatly reduced, and the power outage time is reduced at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the front view of the preferred embodiment of the present invention.

[0024] Figure 2 is Figure 1 the side view of the embodiment.

[0025] Figure 3 is Figure 1 the wiring three-dimensional view of the main line cross arm and the T-junction cross arm of the embodiment.

[0026] Figure 4 For Figure 1 Schematic wiring diagram of the main cross arm and the T-joint cross arm of the embodiment.

[0027] Figure 5 For Figure 1 Front view of the jumper insulator seat of the embodiment.

[0028] Figure 6 For Figure 1 Top view of the jumper insulator seat of the embodiment.

[0029] Figure 7 For Figure 1 Schematic structural diagram of the climbing ladder of the embodiment.

[0030] Figure 8 For Figure 1 Schematic connection diagram of the climbing ladder and the main pole of the embodiment.

[0031] Figure 9 For Figure 1 Schematic structural diagram of the flange of the embodiment.

[0032] The reference numerals in the figure are: 1, flange; 11, fixing hole; 12, reinforcing rib; 2, main pole; 3, climbing ladder; 31, connecting rod; 32, tread bar; 33, side boss; 34, connecting piece; 4, jumper insulator seat; 41, wing hanging plate; 42, side hanging plate; 43, lower hanging plate; 5, T-joint cross arm; 6, main cross arm; 7, main line conductor; 8, T-joint line conductor; 9, jumper; 10, insulator string. Detailed implementation manners

[0033] The present invention will be described below with reference to the accompanying drawings. The specific implementation manners described herein are only for explaining and understanding the present invention, and are not used to limit the present invention.

[0034] As Figure 1 shown, the double-circuit T-joint steel pipe pole of this embodiment includes a vertically arranged main pole 2. A flange 1 is provided at the bottom end of the main pole 2, and a T-joint cross arm 5, a main cross arm 6 and a climbing ladder 3 are provided on the main pole. The main pole 2 is a 12-sided steel pipe divided into three sections, and the sections of the main pole 2 are connected by insertion. Among them, the width of the main pole 2 from side to side at the bottom end is 1 m, and the width from side to side at the top end is 0.5 m.

[0035] The T-junction crossarm 5 is distributed in multiple layers and on both sides; the main line crossarm 6 is arranged on the same layer as the T-junction crossarm 5, and is distributed in a "T" shape with the T-junction crossarm 5 on the same layer. Among them, the T-junction crossarm 5 is set to four layers, the main line crossarm 6 is set to three layers, and the main line crossarm 6 is arranged on the same layer as the lower three layers of the T-junction crossarm 5. The height of the first layer of the T-junction crossarm 5 is 15m, the distance between the second layer of the T-junction crossarm 5 and the first layer of the T-junction crossarm 5 is 3.5m, the distance between the third layer of the T-junction crossarm 5 and the second layer of the T-junction crossarm 5 is 3.5m, and the distance between the fourth layer of the T-junction crossarm 5 and the third layer of the T-junction crossarm 5 is 2m.

[0036] Reference Figure 3 and Figure 4 , the end of the main line crossarm 6 is the hanging point for connecting the main line conductor 7. The end of the T-junction crossarm 5 is the hanging point for connecting the T-junction line conductor 8. A jumper 9 is connected in series between the two hanging points; an insulator string 10 is provided at the hanging point.

[0037] More specifically, for the power supply inlet of a newly built 110 kV substation, it is achieved by single-opening the nearby 110 kV line. Only one loop of the double-loop line that needs to be connected to the substation is opened. A double-loop T-junction steel pipe pole of this embodiment is newly erected outside the opened line. The opened line (i.e., the main line conductor 7) is connected to the main line crossarm 6, and then the substation incoming line section conductor (i.e., the T-junction line conductor 8) is connected in series through the suspension jumper 9 hanging under the T-junction crossarm 5 in the substation direction, thereby forming the line connection between the newly built 110 kV substation and the upper and lower level 220 kV substations. This embodiment simplifies the wiring method, greatly saves the construction workload, reduces the steel consumption of the pole tower, and reduces the cost.

[0038] Reference Figure 5 and Figure 6 , jumper insulator seats 4 are provided at the ends of the main line crossarm 6 and the T-junction crossarm 5. The jumper insulator seat 4 is used to install the insulator string 10. The jumper insulator seat 4 includes two wing hanging plates 41, two side hanging plates 42, and two lower hanging plates 43. The two wing hanging plates 41 are respectively unfolded on both sides of the top of the end of the crossarm (i.e., the main line crossarm 6 and the T-junction crossarm 5), and are provided with a through hole. The two side hanging plates 42 protrude laterally in parallel at the end of the crossarm and are provided with two through holes. The two lower hanging plates 43 protrude downward in parallel at the bottom of the end of the crossarm and are provided with a through hole. The above through holes are selected as the connection holes for the insulator string 10 according to the incoming and outgoing directions of the line.

[0039] Reference Figure 7 and Figure 8 , a ladder 3 is provided on the outside of the main pole 2 from bottom to top. The ladder 3 includes a vertically arranged connecting rod 31 fixed to the side wall of the main pole 2, and tread rods 32 horizontally fixed on both sides of the connecting rod 31 in a staggered manner. The main pole 2 is provided with a side convex platform 33. The connecting rod 31 approaches the side convex platform 33 in a single or double-row side-by-side manner, and the connecting rod 31 and the side convex platform 33 are fixedly connected through a connecting piece 34.

[0040] Reference Figure 9 , the bottom end of the main rod 2 is fixed to the ground through the flange 1. Twenty fixing holes 11 with a pore diameter of 80 mm are evenly surrounded on the flange 1. Reinforcing ribs 12 are arranged between the fixing holes 11. The flange 1 is fixedly connected to the bottom end of the main rod 2 and is installed on the ground treated by concrete curing by passing bolts through the fixing holes 11.

Claims

1. A double-circuit T-connected steel pipe pole, characterized in that, it includes: A main pole (2) erected vertically; A T-connected cross arm (5) installed on the main pole (2), which is distributed in multiple layers on both sides; A main line cross arm (6) installed on the main pole (2), which is arranged on the same layer as the T-connected cross arm (5) and is distributed in a "T" shape with the T-connected cross arm (5) on the same layer; The end of the main line cross arm (6) is a hanging point for connecting the main line conductor (7); The end of the T-connected cross arm (5) is a hanging point for connecting the T-connected line conductor (8), and the two hanging points are connected in series through a jumper wire (9); For the double-circuit line, only one circuit that needs to be connected to the substation is opened. A double-circuit T-connected steel pipe pole is newly erected outside the opened line. The main line conductor (7) is connected to the main line cross arm (6), and then the T-connected line conductor (8) is connected in series through the suspension jumper wire (9) hanging under the T-connected cross arm (5) in the direction of the substation to simplify the wiring method; Jumper insulator seats (4) are provided at the ends of the main line cross arm (6) and the T-connected cross arm (5); The jumper insulator seat (4) includes two wing hanging plates (41) both provided with through holes, two side hanging plates (42) and two lower hanging plates (43); the two wing hanging plates (41) are respectively unfolded on both sides of the top of the cross arm end; the two side hanging plates (42) protrude laterally in parallel at the cross arm end; the two lower hanging plates (43) protrude downward in parallel at the bottom of the cross arm end.

2. The double-circuit T-connected steel pipe pole according to claim 1, characterized in that: A ladder (3) is provided on the outside of the main pole (2) from bottom to top; the ladder (3) includes a vertically arranged connecting rod (31) fixed to the side wall of the main pole (2), and step rods (32) horizontally fixed on both sides of the connecting rod (31) in a staggered manner; the main pole (2) is provided with a side boss (33), the connecting rod (31) approaches the side boss (33) in a single or double-row side-by-side manner, and the connecting rod (31) and the side boss (33) are fixedly connected through a connecting piece (34).

3. The double-circuit T-connected steel pipe pole according to claim 1, characterized in that: The main pole (2) is arranged in sections, and the sections of the main pole (2) are connected by insertion.

4. The double-circuit T-connected steel pipe pole according to claim 1 or 3, characterized in that: The main pole (2) is a 12-sided steel pipe.

5. The double-circuit T-connected steel pipe pole according to claim 1, characterized in that: The bottom end of the main pole (2) is fixed to the ground through a flange (1), and several fixing holes (11) are arranged around the flange (1), and reinforcing ribs (12) are arranged between the fixing holes (11).

6. The double-circuit T-connected steel pipe pole according to claim 5, characterized in that: The fixing holes (11) are evenly distributed on the flange (1), the number of the fixing holes (11) is 20, and the hole diameter is 80 mm.

7. The double-circuit T-connected steel pipe pole according to claim 1, characterized in that: The T-connected cross arm (5) is provided with four layers, and the main line cross arm (6) is provided with three layers, and the main line cross arm (6) is arranged on the same layer as the lower three layers of the T-connected cross arm (5).

8. The double-circuit T-connected steel pipe pole according to claim 7, characterized in that: The height of the first-layer T-junction cross arm (5) is 15 m, the distance between the second-layer T-junction cross arm (5) and the first-layer T-junction cross arm (5) is 3.5 m, the distance between the third-layer T-junction cross arm (5) and the second-layer T-junction cross arm (5) is 3.5 m, and the distance between the fourth-layer T-junction cross arm (5) and the third-layer T-junction cross arm (5) is 2 m.

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