CN106921136A - A kind of side phase conductor support meanss and installation method for electric power line pole tower - Google Patents

Abstract

The invention discloses a supporting device for side-phase wires used in transmission line poles and towers. It includes a rigid insulating support device, one end of the rigid insulating support device is connected to the inner side of the root of the cross arm, and the other end of the rigid insulating support device is connected to the bottom of the hanging insulator string. The beneficial effects achieved by the present invention: first, the effect of preventing the occurrence of windage accidents of the present invention is obvious, especially those lines whose conventional anti-windage measures are ineffective but cannot be transformed into "V"-shaped strings; secondly, The present invention is simple in structure, safe and reliable, and only needs to add a hanging hole at the root of the cross-arm during installation, which avoids major transformation of the iron tower during construction; Complete the work of installing the hanging hole under the running state.

Description

Side-phase wire support device and installation method for power transmission line tower

technical field

The invention relates to a support device and an installation method for side-phase wires used in power transmission line towers, and belongs to the technical field of power line maintenance.

Background technique

Trip accident is one of the main problems that endanger the safe operation of the line. According to the statistics of the State Grid Corporation of China in 2015, the main causes of line tripping are: lightning strikes (617 times, accounting for 40.6%), external damage (330 times, accounting for 21.7%), ice damage (201 times, accounting for 13.2%), Bird damage (170 times, accounting for 11.2%) and wind damage (152 times, accounting for 10%). The main causes of outages are: external damage (174, accounting for 31.6%), ice damage (156, accounting for 28.4%), wind damage (104, accounting for 18.9%) and lightning strikes (69, accounting for 12.5%) , and bird damage (19, accounting for 3.5%).

It can be seen from the above statistical results that the wind deflection trip is more harmful to the line. The probability of line failure and outage due to wind deflection tripping is relatively high, especially for important lines and power plant sending lines. Coupled with the frequent occurrence of strong winds and natural disasters in some areas, it is particularly important to prevent wind deviation in this area.

Contents of the invention

For new lines, "V" strings can be used to completely solve the problem of wind deflection. For lines that are already in operation, a weighted hammer and a double-string "character-eight" arrangement are generally used, but in this way the insulator strings will still swing towards the tower under the action of strong winds. For areas where strong winds and natural disasters occur frequently, wind deviation accidents may occur once there is an instantaneous extreme wind speed.

The side phase support device is to use a high-strength rigid insulating material to connect between the root of the cross arm and the side phase wire. In this way, the side-phase conductor is supported so that it will not deflect under the action of strong wind, and the problem of wind deflection of the side-phase conductor is completely solved.

According to the above analysis, if there is an insulating support device connected between the root of the cross arm and the conductor, it can prevent the deflection of the side-phase conductors, and completely solve the wind deflection problem of the side-phase conductors without large-scale reconstruction of the tower.

The technical problem to be solved by the present invention is to overcome the defects of the prior art, and provide a support device and installation method for side-phase wires used in power transmission line towers.

In order to solve the above-mentioned technical problems, the present invention provides a side-phase wire support device for transmission line poles and towers, including transmission line poles and towers, a cross arm is fixedly arranged on the power transmission line pole tower, and a number of cross arms are arranged at the end of the cross arm The suspension insulator string is characterized in that it also includes a rigid insulation support device, one end of the rigid insulation support device is connected to the inner side of the root of the cross arm, and the other end of the rigid insulation support device is connected to the suspension insulator string. connected at the bottom.

As a preferred embodiment, several hanging holes are provided on the inner side of the root of the cross arm, and one end of the rigid insulating support device is connected to the hanging holes.

As a preferred embodiment, the rigid insulation support device includes a support link, and the two ends of the support link are respectively connected to the inner side of the root of the cross arm and the bottom of the hanging insulator string.

As a preferred embodiment, a sheath is nested on the outer surface of the supporting link.

As a preferred embodiment, both ends of the supporting connecting rod are provided with steel sleeves to facilitate connection with steel components and fittings on the power transmission line tower.

As a preferred embodiment, a number of pressure equalizing rings 44 are installed on the side of the supporting connecting rod connected with the fittings on the power transmission line tower.

As a preferred embodiment, the supporting link is made of epoxy-based glass fiber reinforced composite material.

As a preferred embodiment, the sheath is made of silicon rubber.

As a preferred embodiment, several connection rings are provided on the suspension insulator strings, and insulators on adjacent suspension insulator strings are connected through the connection rings.

The present invention also proposes an installation method for the side-phase wire support device of the transmission line pole tower, which is characterized in that it specifically includes: when the transmission line is still in operation, construction personnel install a number of hanging holes at the root of the cross arm; After the installation of the hanging hole is completed and the power is cut off on the transmission line, remove the original suspension insulator string, and install the rigid insulation support device and the suspension insulator string with connecting rings on the root and end of the cross arm respectively; In an environment where the rigid insulating support device supports the wires to prevent them from shifting to the tower side of the transmission line tower.

Beneficial effects achieved by the present invention: First, the effect of preventing windage accidents of the present invention is obvious, especially those lines whose conventional anti-windage measures are ineffective but cannot be transformed into "V"-shaped strings; second, The present invention is simple in structure, safe and reliable, and only needs to add a hanging hole at the root of the cross-arm during installation, which avoids major transformation of the iron tower during construction; Complete the work of installing the hanging hole under the running state.

Description of drawings

Fig. 1 is a schematic diagram of the installation of a side-phase wire support device for a power transmission line tower according to the present invention.

Fig. 2 is a schematic diagram of the installation structure of the connecting ring and the pressure equalizing ring of the present invention.

Fig. 3 is a schematic diagram of the installation position of the hanging hole of the present invention.

Fig. 4 is a structural schematic diagram of the lower plane of the cross arm before the iron tower of the present invention is installed with hanging holes.

Fig. 5 is a schematic structural view of the lower plane of the cross arm after the hanging hole is installed on the iron tower of the present invention.

Fig. 6 is a structural schematic diagram of a support device for side-phase wires used in transmission line towers according to the present invention after installation.

The meaning of the marks in the figure: 1- transmission line tower, 2- cross arm, 3- suspension insulator string, 4- rigid insulation support device, 5- connecting ring, 6- hanging hole, 41- supporting connecting rod, 42- sheath , 43-steel sleeve, 44-pressure equalizing ring.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

Fig. 1 is a schematic diagram of the installation of a side-phase wire support device for a power transmission line tower according to the present invention. The present invention proposes a side-phase conductor support device for transmission line towers, which includes a transmission line tower 1, a cross arm 2 is fixedly arranged on the transmission line tower 1, and a plurality of hanging insulator strings 3 are arranged at the end of the cross arm 2. The feature is that it also includes a rigid insulating support device 4 , one end of the rigid insulating support device 4 is connected to the inner side of the root of the cross arm 2 , and the other end of the rigid insulating support device 4 is connected to the bottom of the hanging insulator string 3 .

As a preferred embodiment, the inner side of the root of the cross arm 2 is provided with several hanging holes 6, and one end of the rigid insulating support device 4 is connected to the hanging holes 6. Fig. 3 is a schematic diagram of the installation position of the hanging holes of the present invention. A place in the middle is the installation position of the hanging hole 6.

Fig. 6 is a structural schematic diagram of a support device for side-phase wires used in transmission line towers according to the present invention after installation. As a preferred embodiment, the rigid insulating support device 4 includes a supporting link 41 , and the two ends of the supporting link 41 are respectively connected to the inner side of the root of the cross arm 2 and the bottom of the hanging insulator string 3 .

As a preferred embodiment, a sheath 42 is nested on the outer surface of the supporting link 41 .

As a preferred embodiment, both ends of the supporting link 41 are provided with steel sleeves 43 for easy connection with steel components and fittings on the power transmission line tower 1 .

As a preferred embodiment, a number of pressure equalizing rings 44 are installed on the side of the supporting connecting rod 41 connected with the fittings on the power transmission line tower 1 .

As a preferred embodiment, the supporting link 41 is made of epoxy-based glass fiber reinforced composite material.

As a preferred embodiment, the sheath 42 is made of silicon rubber.

Considering that after the support of the side-phase conductors, the suspension insulator string will be lifted due to an upward force under the action of a large reverse wind. In order to prevent the insulator bayonet of the suspension insulator string from being damaged due to repeated lifting, the insulator will fall off , so the connection form of the ball-bowl head between ordinary insulators is replaced by the connection form between connecting rings, and the strength and insulation level should be the same as the original insulators. Fig. 2 is a schematic diagram of the installation structure of the connecting ring and the pressure equalizing ring of the present invention. As a preferred embodiment, several connection rings 5 are provided on the suspension insulator strings 3 , and insulators on adjacent suspension insulator strings 3 are connected through the connection rings 5 .

Fig. 4 is a structural schematic diagram of the lower plane of the cross arm before the iron tower of the present invention is installed with hanging holes. Fig. 5 is a schematic structural view of the lower plane of the cross arm after the hanging hole is installed on the iron tower of the present invention. The present invention also proposes an installation method for the side-phase wire support device of the transmission line pole tower, which specifically includes: when the transmission line is still in operation, the construction personnel install a number of hanging holes 6 at the root of the cross arm 2; 6 After the installation is completed and the transmission line is powered off, remove the original suspension insulator string, and install the rigid insulating support device 4 and the suspension insulator string 3 with the connecting ring 5 on the root and end of the cross arm 2 respectively; In a windy environment, the rigid insulating support device 4 supports the wires to prevent them from shifting to the side of the transmission line tower 1 .

Beneficial effects achieved by the present invention: First, the effect of preventing windage accidents of the present invention is obvious, especially those lines whose conventional anti-windage measures are ineffective but cannot be transformed into "V"-shaped strings; second, The present invention is simple in structure, safe and reliable, and only needs to add a hanging hole at the root of the cross-arm during installation, which avoids major transformation of the iron tower during construction; Complete the work of installing the hanging hole under the running state.

The above is only a preferred embodiment of the present invention, and it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, some improvements and modifications can also be made. It should also be regarded as the protection scope of the present invention.

Claims (10)

1. a kind of side phase conductor support meanss for electric power line pole tower, including electric power line pole tower（1）, the transmission line of electricity Shaft tower（1）On be fixedly installed cross-arm（2）, the cross-arm（2）End be provided with some suspension insulators（3）, its feature It is, also including rigid insulation support device（4）, the rigid insulation support device（4）One end and the cross-arm（2）Root Portion inner side is connected, the rigid insulation support device（4）The other end and the suspension insulator（3）Bottom be connected Connect.

2. a kind of side phase conductor support meanss for electric power line pole tower according to claim 1, it is characterised in that institute State cross-arm（2）Root inner side be provided with some hanging holes（6）, the rigid insulation support device（4）One end and the hanging hole （6）It is connected.

3. a kind of side phase conductor support meanss for electric power line pole tower according to claim 1, it is characterised in that institute State rigid insulation support device（4）Including support link（41）, the support link（41）Two ends respectively with the cross-arm（2） Root inner side, the suspension insulator（3）Bottom be connected.

4. a kind of side phase conductor support meanss for electric power line pole tower according to claim 3, it is characterised in that institute State support link（41）Outer surface nesting be provided with sheath（42）.

5. a kind of side phase conductor support meanss for electric power line pole tower according to claim 3, it is characterised in that institute State support link（41）Two ends be provided with steel bushing（43）, it is easy to and electric power line pole tower（1）On steel member and gold utensil connect Connect.

6. a kind of side phase conductor support meanss for electric power line pole tower according to claim 3, it is characterised in that institute State support link（41）On with the electric power line pole tower（1）On gold utensil connection side some grading rings are installed（44）.

7. a kind of side phase conductor support meanss for electric power line pole tower according to claim 3, it is characterised in that institute State support link（41）Material for epoxy base fiberglass strengthen composite.

8. a kind of side phase conductor support meanss for electric power line pole tower according to claim 4, it is characterised in that institute State sheath（42）Material be silicon rubber.

9. a kind of side phase conductor support meanss for electric power line pole tower according to claim 1, it is characterised in that institute State suspension insulator（3）On be provided with some connection rings（5）, the adjacent suspension insulator（3）On insulator pass through The connection ring（5）It is connected.

10. a kind of installation method based on the side phase conductor support meanss for being used for electric power line pole tower described in claim 1, it is special Levy and be, specifically include：In transmission line of electricity still in the case of operation, workmen is in the cross-arm（2）If root install Cladding hole（6）；The hanging hole（6）Installation removes former suspension insulator after after transmission line of electricity power failure, and will be described firm Property insulation support device（4）With install the connection ring additional（5）The suspension insulator（3）It is separately mounted to cross-arm（2）'s Root and end；Finally when transmission line of electricity is in the environment of having wind, the rigid insulation support device（4）Supporting wire prevents To the electric power line pole tower（1）Tower body side skew.