CN205265207U - Two return circuit compact [type] tower combine two insulator chain devices of L type - Google Patents

Abstract

The utility model discloses a two return circuit compact [type] tower combine two insulator chain devices of L type, the device includes: stick type suspension type composite insulator, yoke plate, cross arm formula composite insulator and suspension clamp, stick type suspension type composite insulator cross arm formula composite insulator with suspension clamp respectively with the yoke plate is connected, connects on the yoke plate stick type suspension type composite insulator with suspension clamp is the I cluster, composite insulator is perpendicular for the cross arm formula it arranges to be the L type behind the I cluster. The utility model discloses a biggest restriction cross arm length reduces and removes, dwindles corridor width.

Description

Double-circuit compact tower combined with L-shaped double insulator string device

technical field

The utility model relates to the field of power transmission overhead lines, in particular to a double-circuit compact tower combined with an L-shaped double insulator string device.

Background technique

The arrangement of insulators on straight towers of empty transmission lines usually adopts I-string and V-string arrangements. For areas with crowded line passages, the length of the crossarm is relatively large due to the influence of wind deflection, which in turn leads to large demolition. Therefore, the existing related devices have poor wind resistance. question.

Utility model content

The purpose of the utility model is to provide a double-circuit compact tower combined with an L-shaped double insulator string device, so as to solve the aforementioned problems existing in the prior art.

In order to achieve the above purpose, the dual-circuit compact tower combined with the L-type double insulator string device of the utility model includes: rod-type suspension composite insulators, connecting plates, cross-arm composite insulators and suspension clamps; type suspension composite insulator, the cross-arm type composite insulator and the suspension clamp are respectively connected to the connecting plate, and the rod-type suspension composite insulator connected to the connecting plate is in the form of the suspension clamp For an I-type string, the cross-arm composite insulators are arranged vertically in an L-shape behind the I-type string.

Preferably, the upper end of the rod-type suspension composite insulator is connected to the cross-arm end of the double-circuit compact tower through a UB hanging plate and a ball-end hanging ring, and the lower end of the rod-type suspension composite insulator is connected through a bowl-end hanging plate connected to the connecting plate.

Preferably, the suspension clamp is connected to the connecting plate through a UB hanging plate.

Preferably, through holes respectively connected to the rod-type suspension composite insulator, the cross-arm composite insulator and the suspension clamp are provided on the connecting plate.

Preferably, the connecting plate and the cross-arm composite insulator are connected through a through hole I, and a sleeve is arranged to pass through the through hole I, and on the upper and lower surfaces of the connecting plate where the through hole I is located Steel rings are respectively provided, and the steel rings are fixedly fitted on the outer wall of the casing.

More preferably, the connection among the steel ring, the sleeve and the connecting plate is a welding connection.

More preferably, the outer diameter of the casing is the same as the inner diameter of the steel ring, the inner diameter of the steel ring is the same as the inner diameter of the through hole I, and the height of the through hole I plus two of the steel The ring thickness is equal to the height of the casing.

Preferably, one end of the cross-arm composite insulator connected to the tower body of the double-circuit compact tower is provided with a first groove matching a fixing plate protruding from the tower body, and the fixing plate is inserted into the first groove. In a groove, fastening bolts vertically pass through the fixing plate and the first groove to connect the cross-arm composite insulator with the tower body; the cross-arm composite insulator connected to the connecting plate One end is provided with a second groove matching the connecting plate, the connecting plate is inserted into the second groove, and the fastening bolt vertically passes through the second groove and the passage I on the connecting plate, and the The cross-arm composite insulator is connected with the connecting plate.

More preferably, the second groove is perpendicular to the groove direction of the first groove.

Preferably, one end of the suspension clamp is connected to the connecting plate, and the other end is connected to a wire.

The beneficial effects of the utility model are:

The utility model starts from limiting the wind deflection of the wires, and limits the length of the cross arm to the greatest possible extent. The 220kV compact double-circuit iron tower involved in this application uses L-shaped insulator strings to limit the wind deflection swing angle of the wire suspension strings to shorten the cross arms. The L-shaped insulator string consists of conventional composite insulators and special cross-arm composite insulators. The device can reduce demolition and reduce the width of corridors, and the line width is about 35% smaller than that of conventional 220kV double-circuit towers. It has good social and economic benefits for new lines and technical transformation of urban power transmission channels.

Description of drawings

Fig. 1 is the schematic diagram of the front view of the double-circuit compact tower combined with the L-type double insulator string device;

Fig. 2 is the structural representation of connecting plate described in Fig. 1;

Fig. 3 is a schematic cross-sectional view of the through hole I on the joint plate described in Fig. 1;

Fig. 4 is a schematic structural view of the steel ring described in Fig. 3;

Fig. 5 is a partial schematic diagram of installing the device described in Fig. 1 on a dual-circuit compact tower;

Among them, 1 means rod-type suspension composite insulator, 2 means cross-arm type composite insulator, 3 means connecting plate, 4 means suspension clamp, 5 means UB hanging plate, 6 means ball head hanging ring, 7 means UB hanging plate, 8 Represent the bowl head hanging plate, 9 represents the first groove, 31 represents the through hole I, 311 represents the steel ring, and 312 represents the casing.

detailed description

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present utility model, and are not intended to limit the present utility model.

Example

Referring to Figures 1-5, the double-circuit compact tower combined with L-shaped double insulator string device described in this embodiment includes: rod-type suspension composite insulators, connecting plates, cross-arm composite insulators and suspension clamps; The rod-type suspension composite insulator, the cross-arm composite insulator and the suspension clamp are respectively connected to the connecting plate, and the rod-type suspension composite insulator connected to the connecting plate is connected to the suspension wire The clips are in the form of an I-type string, and the cross-arm composite insulators are arranged vertically in an L-shape behind the I-type string.

A more detailed explanation:

(1) The upper end of the rod-type suspension composite insulator is connected to the cross-arm end of the double-circuit compact tower through the UB hanging plate and the ball-end hanging ring, and the lower end of the rod-type suspension composite insulator is connected through the bowl-head hanging plate connected to the connecting plate. One end of the suspension clamp is connected to the connecting plate through the UB hanging plate, and the other end is connected to the wire.

(2) Through holes connected to the rod-type suspension composite insulator, the cross-arm type composite insulator and the suspension clamp are provided on the connecting plate. The connecting plate and the cross-arm type composite insulator are connected through the through hole I, a bushing is set to pass through the through hole I, and steel pipes are respectively arranged on the upper and lower surfaces of the connecting plate where the through hole I is located. ring, and the steel ring is fixedly fitted on the outer wall of the casing. The connection among the steel ring, the sleeve and the connecting plate is welded connection. The outer diameter of the casing is the same as the inner diameter of the steel ring, the inner diameter of the steel ring is the same as the inner diameter of the through hole I, and the height of the through hole I plus the thickness of the two steel rings is equal to the the height of the casing.

(3) One end of the cross-arm composite insulator connected to the tower body of the double-circuit compact tower is provided with a first groove matching the fixing plate protruding from the tower body, and the fixing plate is inserted into the first groove In a groove, fastening bolts vertically pass through the fixing plate and the first groove to connect the cross-arm composite insulator with the tower body; the cross-arm composite insulator connected to the connecting plate One end is provided with a second groove matching the connecting plate, the connecting plate is inserted into the second groove, and the fastening bolt vertically passes through the second groove and the passage I on the connecting plate, and the The cross-arm composite insulator is connected with the connecting plate. The second groove is perpendicular to the groove direction of the first groove.

The cross-arm type composite insulator is used to fix the I-string, one end is fixed to the iron tower, and the connection with the iron tower is connected with a U-shaped connection, which can be rotated forward and backward, and one end is connected to the I-string through a special connecting plate, which can be rotated up and down. After adopting the cross-arm type composite insulator, the I-string is restricted from swinging left and right by the wind, and the length of the cross-arm is reduced. The through hole of the connecting plate is connected with the sleeve and the U-ring to avoid the concentration of U-ring rotational stress.

Functional explanation of each structure in the utility model:

(1) Double-circuit compact iron tower: support wire;

(2) Cross-arm composite insulator: limit the wind deflection of the wire, and also have the function of insulation. It is connected with the conventional I-type insulation string with a special connecting plate.

(3) Rod-type suspension composite insulator: insulation function.

(4) Connectors: Used between the insulator string and the pole tower, between the clamp and the insulator string, such as the UB hanging plate, the ball hanging ring, the bowl hanging plate, and the connecting plate shown in Figure 1.

(5) Connecting plate: Connect the cross-arm composite insulator to the I string.

(6) Suspension clamp: used to fix the wire on the suspension insulator string of the straight tower.

By adopting the above-mentioned technical solution disclosed in the utility model, the following beneficial effects are obtained: the utility model starts from limiting the wind deflection of the conductor, and limits the length of the cross-arm to the greatest possible extent. The 220kV compact double-circuit iron tower involved in the application adopts L-shaped insulators The string limits the windage sway angle of the wire suspension string to shorten the crossarm. The L-shaped insulator string consists of conventional composite insulators and special cross-arm composite insulators. The device can reduce demolition and reduce the width of corridors, and the line width is about 35% smaller than that of conventional 220kV double-circuit towers. It has good social and economic benefits for new lines and technical transformation of urban power transmission channels.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made, these improvements and Retouching should also be considered within the protection scope of the present utility model.

Claims (10)

1. A dual-circuit compact tower combined L-shaped double insulator string device, characterized in that the device includes: rod-type suspension composite insulators, connecting plates, cross-arm composite insulators and suspension clamps; The rod-type suspension composite insulator, the cross-arm composite insulator and the suspension clamp are respectively connected to the connecting plate, and the rod-type suspension composite insulator connected to the connecting plate is connected to the suspension The clamps are in an I-shaped string, and the cross-arm composite insulators are arranged vertically in an L-shape behind the I-shaped string. 2. The device according to claim 1, characterized in that, the upper end of the rod-type suspension composite insulator is connected to the cross-arm end of the double-circuit compact tower through a UB hanging plate and a ball-end hanging ring, and the rod-type The lower end of the suspension composite insulator is connected to the connecting plate through the bowl hanging plate. 3. The device according to claim 1, wherein the suspension clamp is connected to the connecting plate through a UB hanging plate. 4 . The device according to claim 1 , wherein through holes connected to the rod-type suspension composite insulator, the cross-arm composite insulator and the suspension clamp are respectively provided on the connecting plate. 5. The device according to claim 1, characterized in that, the connecting plate and the cross-arm composite insulator are connected through a through hole I, a bushing is set through the through hole I, and in the through hole I Steel rings are respectively arranged on the upper and lower surfaces of the connecting plate, and the steel rings are fixedly fitted on the outer wall of the casing. 6. The device according to claim 5, characterized in that the connection among the steel ring, the sleeve and the connecting plate is a welding connection. 7. The device according to claim 5, wherein the outer diameter of the casing is the same as the inner diameter of the steel ring, the inner diameter of the steel ring is the same as the inner diameter of the through hole I, and the through hole The height of I plus the thickness of the two steel rings is equal to the height of the casing. 8. The device of claim 1, wherein: One end of the cross-arm composite insulator connected to the tower body of the double-circuit compact tower is provided with a first groove matching the fixing plate protruding from the tower body, and the fixing plate is inserted into the first groove wherein, fastening bolts vertically penetrate through the fixing plate and the first groove, and connect the cross-arm composite insulator with the tower body; One end of the cross-arm type composite insulator connected with the connecting plate is provided with a second groove matching the connecting plate, the connecting plate is inserted into the second groove, and the fastening bolts vertically pass through the The second groove and the passage I on the connecting plate connect the cross-arm composite insulator to the connecting plate. 9 . The device according to claim 8 , wherein the second groove is perpendicular to the groove direction of the first groove. 10 . The device according to claim 1 , wherein one end of the suspension clamp is connected to the connecting plate, and the other end is connected to a wire. 11 .