CN209358149U - The V string structure of more hanging points - Google Patents

Abstract

The utility model protects a kind of V string structure of more hanging points, its emphasis is to be connected to 1 insulator chain on power transmission tower at least through 2 or 2 or more V series windings, the hanging point of V string can be located at conducting wire cross-arm bottom, on the point of intersection cranked arm or both, the half that the angle of V string is all satisfied the angle, which is less than, designs maximum 5 ° -10 ° of angle of wind deflection, for 1 insulator chain, multiple V string hanging points are set, it is long by adjusting different V string angles and single limb string in the case where different loads and angle of wind deflection, reduce the single limb load of V string, reduce V string intensity, reduce the insulator and fitting tonnage of single limb carrying, the qualified relation of V string angle and angle of wind deflection under different situations can also be met, make the conductor spacing approximately fixed center in tower window of circle, to which the scope of application is bigger, utilization rate is higher.

Description

The V string structure of more hanging points

Technical field

It is outstanding applied to the insulator chain for having multiple V string hanging points on power transmission tower in transmission line of electricity that the utility model relates to a kind of Extension mode.

Background technique

The hanging wire scheme of tangent tower conducting wire is led to there are commonly two kinds of " I serial type formula " and " V serial type formula " in overhead transmission line, Wherein V insulator string can play the role of reduce its vertical length of width of corridor it is relatively short play save tower height, so With extensive in super, extra high voltage line.

The tower of V-type insulator chain is generallyd use to calculate most in the case where most strong wind first according to the use condition of planning Big horizontal loading combines down with vertical load calculates conducting wire maximum angle of oscillation, and according to one of angle between pendency two limb of V-type string As ~ 10 ° principles 5 ° small than maximum angle of wind deflection determine two limb angles.Determine V string angle after according to operation, thunder and lightning and livewire work Etc. operating conditions gap draw Clearance joints so that it is determined that tower head size.So steel tower usually only corresponds to a V string angle, the single limb of V string is strong Degree selects the tonnage for meeting safety coefficient requirement after calculating according to actual service conditions.And the single limb of V string under same conductor load Stress becomes larger with V string angle and is increased, and the corresponding V string angle of the same tower then will cause insulator chain ton in actual use Position it is excessive, so as to cause waste the case where.In addition, sometimes because conducting wire angle of wind deflection is more than 10 ° of angle half of V string of the tower or more When just need to select bigger tower, and conductor load and less for no other reason than that angle of wind deflection uses greatly when practical angle of wind deflection is big The bigger steel tower of steel quantity consumption, the case where increase so as to cause engineering construction cost.

Utility model content

The technical issues of the utility model is solved is providing a kind of V string structure of more hanging points.

Technological means used by the utility model is as described below.

A kind of V string structure of more hanging points, 1 insulator chain are connected to power transmission tower at least through 2 or 2 or more V series windings On.

The half that the angle of each V string is all satisfied the angle is less than maximum 5 ° -10 ° of angle of wind deflection.

Further, comprising the first V string, the 2nd V string, the 3rd V string, two limb outer end hanging points of the first V string are located at It cranks arm on tower body inside, the friendship that two limb outer end hanging points of the 2nd V string are located at tower body top conductor line cross-arm and above crank arm At point, hanging point is not located at conducting wire cross-arm lower plane for two limb outer ends of the 3rd V string.

The first V string, the 2nd V string, respective two hanging points of the 3rd V string are symmetrical arranged.

It is had the beneficial effect that caused by the utility model.

The utility model is the scheme that 1 insulator chain corresponds to that multiple V strings are hung, by tower body, cross-arm setting Many places hanging point can be applicable in a variety of angle V-type insulator chains in the same steel tower, guarantee conducting wire V string by adjusting V string limb is long Clearance joints are substantially motionless to meet the safe distance requirement of conducting wire and hardware fitting with electrical part to steel tower.Not due to hanging point position Together, lead location is motionless at tower window makes insulator V string have different V string angles, and different V-type insulator chain angles can Be applicable in different steel tower applicable elements, in the case where small for big vertical load conducting wire angle of wind deflection, using small V go here and there angle hanging point, Steel tower can be made to bear bigger conductor load, to reduce the single limb load of V string, reduce V string intensity, reduce insulator and fitting ton Position, can reduce construction investment in this case.It is then hung using big V string angle in the case of big for small vertical load conducting wire angle of wind deflection Point can make steel tower bear bigger conducting wire angle of oscillation, and avoiding in conducting wire angle of wind deflection is more than 10 ° of angle half of the V string of the tower Bigger tower is selected when above, thus the case where causing the investments such as steel tower, basis increase.

And the case where a variety of V string hanging points are set in the same steel tower, are on the one hand applicable to big vertical span big load, Also the case where applicable big horizontal span conducting wire big angle of oscillation, no matter which kind of situation all can produce better adaptability.Steel tower can V string hanging point quantity appropriate and position are selected according to practical usable condition, so that tower window arrangement is more economical, reasonable.

Detailed description of the invention

Fig. 1 is the tower window portion separation structure single line schematic diagram using an embodiment of the utility model.

Fig. 2 is the partial structurtes single line schematic diagram using another embodiment of the utility model.

Specific embodiment

The utility model protects a kind of V string structure of the insulator chain of multiple hanging points.

It is illustrated for wineglass tower embodiment comprising 3 V string as shown in Figure 1.Include 1 insulation among tower body Substring 1, the insulator chain 1 hang on the tower window center of tower body by 3 V strings.Specifically, V string point from outside to inside is defined Not Wei the first V go here and there the 21, the 2nd V and go here and there the 22, the 3rd V string 23, the first V string 21 is located on steel tower in the hanging point on tower body cranks arm on the inside of 6 (diagram 51), the 2nd V string 22 in the hanging point on tower body be located at conducting wire cross-arm 4 with above crank arm 6 point of intersection (illustrating 52), the 3rd V String 23 is located at 4 lower plane of conducting wire cross-arm (diagram 53) in the hanging point on tower body, and the first V string the 21, the 2nd V the 22, the 3rd V of string string 23 Respective two hanging points are symmetrical arranged.The length of above-mentioned 3 V string ensures that conductor spacing circle 3 is same generally within tower window center position When stress demand when meeting windage yaw and Clearance joints 3 meet clearance requirement distance, those skilled in the art can determine its position It sets.

Above-mentioned first V goes here and there the 21, the 2nd V, and to go here and there the angle that respective two limbs of the 22, the 3rd V string 23 are formed be respectively θ 1, θ 2, θ 3, The half of θ 1, θ 2, θ 3 are equally all satisfied less than maximum 5 ° -10 ° of angle of wind deflection.

Certainly, it is not limited in the tower using 3 V strings, 2 V strings or 3 can be selected according to the specification of practical steel tower The above V string, hanging point can be added at upper each node of cranking arm, at each node of conducting wire lower plane etc..

It can be applied to a variety of towers, embodiment as shown in Figure 2 using the mode of multiple V string hanging point, tower is dry Word tower, diagram local location are 4 lower section one side mounting, 1 insulator chain 1 of topping wire cross-arm, which passes through 2 V String 2 is connected to the lower surface of topping wire cross-arm 4, and two limbs of every group of V string 2 can be same long or make setting for different length according to the actual situation Meter.Above-mentioned hang can also be used in insulator chain on other cross-arms.

It hangs an insulator chain and is correspondingly arranged multiple V strings, can be hung over by actual conditions using different length V string fitting The different V string angle formed when different hanging points, using lesser V string angle in the case where big load small angle of wind deflection, in small lotus Biggish V string angle is used in the case where carrying big angle of wind deflection, meets bigger requirement, so that the scope of application is bigger, is used Rate is higher.

Claims (3)

1. a kind of V string structure of more hanging points, which is characterized in that 1 insulator chain is connected to defeated by 2 or 2 or more V series windings In pylon, the half that the angle of each V string is all satisfied the included angle is less than maximum 5 ° -10 ° of angle of wind deflection.

2. the V string structure of more hanging points as described in claim 1, which is characterized in that include the first V string (21), the 2nd V string (22), the 3rd V goes here and there (23), two limb outer end hanging points of the first V string (21) be located at tower body on crank arm (6) inside, it is described Two limb outer end hanging points of the 2nd V string (22) are located at tower body top conductor line cross-arm (4) and the point of intersection of (6) of above cranking arm, and described the Hanging point is not located at conducting wire cross-arm (4) lower plane for two limb outer ends of three V string (23).

3. the V string structure of more hanging points as claimed in claim 2, which is characterized in that the first V string (21), the 2nd V string (22), the 3rd V string (23) respective two hanging points are symmetrical arranged.