CN212867076U - Double-loop linear strain tower convenient for pi connection - Google Patents
Double-loop linear strain tower convenient for pi connection Download PDFInfo
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- CN212867076U CN212867076U CN202021425462.5U CN202021425462U CN212867076U CN 212867076 U CN212867076 U CN 212867076U CN 202021425462 U CN202021425462 U CN 202021425462U CN 212867076 U CN212867076 U CN 212867076U
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Abstract
The utility model relates to a double-loop linear strain tower convenient for pi connection, which relates to the field of power transmission lines and comprises a steel pipe pole, a lightning conductor cross arm group arranged on the steel pipe pole and a lead wire hanging cross arm group arranged on the steel pipe pole, wherein the lead wire hanging cross arm group is provided with three groups at intervals along the height direction of the steel pipe pole; the lightning conductor cross arm group and the wire hanging cross arm group all include three cross arms that set up along steel pipe pole circumference interval. The method has the advantages of small construction workload and low manufacturing cost during pi connection.
Description
Technical Field
The application relates to the field of power transmission lines, in particular to a double-loop linear strain tower convenient for pi connection.
Background
At present, from the perspective of power grid planning, by combining with distribution and construction timing sequences of transformer substations, an overhead power transmission line is often required to be looped in and disconnected at a certain point in the future so as to meet the requirement of accessing a system in planning.
As shown in figure 1, the construction, power failure and engineering investment of the later-stage pi joint are basically not considered in the current-stage design, and the original linear tension tower is dismantled to newly build two corner towers 7. Each corner tower 7 includes a steel pipe pole 3 and two cross arms 311 fixed to the circumferential direction of the steel pipe pole 3. One side that two corner towers kept away from mutually all cooperates and uses has a first shaft tower 1, and two corner towers 7 cooperate with one side and use and have a second shaft tower 2. First shaft tower 1 and second shaft tower 2 all include branch 11 and are fixed in two wire jumper cross arms 12 of branch 11 circumference. A cross arm 311 of the corner tower is connected with jumper cross arms 12 of a first tower 1 and a second tower 2 through a lead 4, the cross arms 311 of the two corner towers far away from the second tower 2 are connected through the lead 4, and the cross arms 311 of the two corner towers far away from the second tower 2 are respectively connected with the jumper cross arms 12 of the two first towers 1 through the lead 4. Wires 4 are insulated from cross arm 311 and jumper cross arm 12. In view of the above-mentioned related technologies, the inventor believes that the defects of large construction workload, long power failure time and large engineering investment exist.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems of large construction workload and long power failure time of a pi contact of a power transmission line, the application provides a double-loop linear strain tower convenient for pi connection.
The application provides a two return circuit straight line strain insulator towers convenient to pi connects adopts following technical scheme:
a double-loop linear tension tower convenient for pi connection comprises a steel pipe pole, a lightning conductor cross arm group arranged on the steel pipe pole and three lead wire hanging cross arm groups arranged on the steel pipe pole, wherein the three lead wire hanging cross arm groups are arranged at intervals along the height direction of the steel pipe pole; the lightning conductor cross arm group and the wire hanging cross arm group all include three cross arms that set up along steel pipe pole circumference interval.
By adopting the technical scheme, the lead of each loop is divided into three phases, one lead is hung for each phase, the requirement of the phase distance of the three-phase leads needs to be ensured, and three cross arms are arranged. When pi connection is needed, the original jumper can be directly removed, and the conducting wires on the adjacent towers are connected into the two cross arms of the linear tension tower. And current needs adopt two shaft towers just can realize pi and connect, and the design of this tower head can reduce the quantity of shaft tower, need not to demolish original sharp strain insulator tower, newly-built two corner towers again, and construction work load is little, and the power off time is short, practices thrift the cost.
Preferably, the end part of the cross arm is used for being connected with a lead matched with the linear tension tower head; and the lead is provided with an anti-vibration hammer.
Through adopting above-mentioned technical scheme, be provided with the damper on the wire with cross arm end connection, can reduce the vibration that pulls because of wind-force, reduce the cross arm and buckle to fatigue damage because of periodic vibration, improved the protection to the cross arm.
Preferably, the cross arm is connected with the steel pipe pole through a fixing part; the fixing part comprises a first sleeve fixed on the steel pipe rod and a first fixing ring formed on the circumferential direction of the first sleeve; the end part of the cross arm is placed on the first fixing ring and is fixedly connected with the first fixing ring.
By adopting the technical scheme, after the first sleeve is fixed on the steel pipe pole, the end part of the cross arm is placed on the first fixing ring, the end part of the cross arm is fixedly connected with the first fixing ring through the bolt, the cross arm is conveniently fixed on the steel pipe pole, and the angle between two adjacent cross arms in the horizontal direction can be adjusted according to the actual situation on site.
Preferably, the outer side of the first sleeve is in threaded connection with a second sleeve; a second fixing ring is formed on the second sleeve; the first fixing ring and the second fixing ring are arranged at intervals; the end of the cross arm is clamped between the first fixing ring and the second fixing ring.
Through adopting above-mentioned technical scheme, set up the second sleeve, with second sleeve threaded connection outside first sleeve for first solid fixed ring and the solid fixed ring of second can be fixed in the tip of cross arm between the two, can press from both sides tightly the tip of cross arm, thereby can further strengthen the fixed to the cross arm tip, the solid fixed ring of annular first and second, the angle of the adjustment cross arm of being convenient for is with the installation condition of adaptation scene, makes the application scope of straight line strain insulator tower wider.
Preferably, annular grooves are formed in the opposite sides of the first fixing ring and the second fixing ring; the end part of the cross arm is provided with a positioning block which is arranged in the annular groove in a sliding manner; and the two end faces of the positioning block are respectively and fixedly connected with the first fixing ring and the second fixing ring.
Through adopting above-mentioned technical scheme, set up the ring channel in first solid fixed ring and the solid fixed ring one side in opposite directions of second, can be restricted in the tip of cross arm between first solid fixed ring and the solid fixed ring of second, reduce the phenomenon that takes place to break away from between cross arm and the steel pipe pole, strengthened being connected between cross arm and the steel pipe pole. The cross arm can be stably connected with the steel pipe pole under the vibration of long-term use or wind power.
Preferably, fixing holes are formed in the sides, far away from the first fixing ring and the second fixing ring, of the first fixing ring and the second fixing ring; a plurality of fixed orificess have been seted up, and a plurality of fixed orificess along the solid fixed ring of first solid fixed ring and the solid fixed ring's of second a week annular array distributes.
Through adopting above-mentioned technical scheme, set up the fixed orifices that the annular array distributes on first solid fixed ring and the solid fixed ring of second, the bolt of being convenient for passes the fixed orifices and fixes the tip of cross arm.
Preferably, a fixed sleeve is formed on the lower end face of the first sleeve; the fixing sleeve is sleeved on the steel pipe rod and fixedly connected with the steel pipe rod through a bolt.
Through adopting above-mentioned technical scheme, set up fixed sleeve for first sleeve can be dismantled with the steel-pipe pole and be connected, realizes that the distance between two adjacent wire string cross arm groups is adjustable, can change the interval between the wire on two adjacent cross arms of vertical direction, makes two adjacent wires of vertical direction be difficult for taking place to twine and knot. The setting of fixed sleeve can also be convenient for adjust the extending direction of cross arm, and when the angle between two adjacent cross arms on the horizontal direction need not adjust, through loosening the bolt on the fixed sleeve for the fixed sleeve can rotate along the circumference of steel-pipe pole, thereby can be convenient for adjust the extending direction of cross arm, is convenient for be connected with other shaft towers.
Preferably, a connecting part for connecting a lead is arranged at the end part of the cross arm far away from the steel pipe pole; the two connecting parts are arranged and are respectively arranged on the upper end surface and the lower end surface of the cross arm; the connecting part comprises a connecting rod rotatably connected with the end part of the cross arm and a connecting ring formed at one end of the connecting rod, which is far away from the cross arm.
Through adopting above-mentioned technical scheme, set up connecting portion, make things convenient for the cross arm to be connected fixedly with the wire, and rotate the connecting rod of connecting, can adapt to the fixed angle of wire, under the vibration of wind-force, connecting portion can adapt to being connected of wire and cross arm for wire and cross arm are connected more stably, are difficult for tightening the damage. Two connecting portions are arranged at the end portion of the same cross arm and are respectively arranged on the upper end face and the lower end face of the cross arm, two wires connected on the same cross arm can be arranged in a staggered mode, and the possibility that the two wires are wound and knotted is reduced.
In summary, the present application includes at least one of the following beneficial technical effects:
the design of the tower head can reduce the number of towers, the original linear tension tower does not need to be dismantled, two corner towers are newly built, the construction workload is small, the power failure time is short, and the manufacturing cost is saved;
the second sleeve is arranged and connected to the outside of the first sleeve in a threaded mode, so that the end portion of the cross arm can be fixed between the first fixing ring and the second fixing ring, the end portion of the cross arm can be clamped, the fixing of the end portion of the cross arm can be further enhanced, the angle of the cross arm can be conveniently adjusted through the annular first fixing ring and the annular second fixing ring to adapt to the field installation situation, and the application range of the linear tension tower is wider;
the connecting portion are arranged, the cross arm and the wire are conveniently connected and fixed, the connecting rod connected with the cross arm is rotated, and the connecting rod can adapt to the fixed angle of the wire.
Drawings
FIG. 1 is a schematic diagram of a prior art pi-junction circuit structure.
Fig. 2 is a schematic structural diagram of the whole linear tension tower according to the embodiment of the present application.
Fig. 3 is a schematic diagram of a pi-junction circuit structure according to an embodiment of the present application.
Fig. 4 is a schematic structural diagram of a fixing portion according to an embodiment of the present application.
Fig. 5 is an enlarged schematic view of a portion a in fig. 2.
Description of reference numerals: 1. a first tower; 11. a strut; 12. a jumper cross arm; 2. a second tower; 3. a steel pipe pole; 31. a lightning conductor cross arm group; 311. a cross arm; 312. positioning blocks; 32. a wire hanging cross arm group; 4. a wire; 41. connecting a hardware fitting; 42. strain insulator-string; 43. strain clamp; 44. a damper; 5. a fixed part; 51. fixing the sleeve; 52. a first sleeve; 53. a first retaining ring; 531. an annular groove; 532. a fixing hole; 54. a second sleeve; 55. a second retaining ring; 6. a connecting portion; 61. a connecting rod; 62. a connecting ring; 7. a corner tower.
Detailed Description
The present application is described in further detail below with reference to figures 2-5.
The embodiment of the application discloses two return circuit straight line strain insulator towers convenient to pi connects. Referring to fig. 2 and 3, the double-loop linear tension tower convenient for pi connection comprises a steel pipe pole 3, a lightning conductor cross arm group 31 and a lead hanging wire cross arm group 32. The lightning conductor cross arm group 31 is close to the top end of the steel pipe pole 3, and the wire hanging cross arm group 32 is close to the lower end of the lightning conductor cross arm group 31. Three groups of the wire hanging cross arm groups 32 are arranged at intervals along the height direction of the steel pipe pole 3. Lightning conductor cross arm group 31 and wire string cross arm group 32 all include three cross arm 311, and three cross arm 311 sets up along 3 circumference intervals of steel pipe pole.
Referring to fig. 3, in pi wiring way structure, the relative both sides that set up of sharp strain insulator tower of this application all cooperate to use and have a first shaft tower 1, and the one side that is provided with first shaft tower 1 adjacent with sharp strain insulator tower respectively cooperates to use and has a second shaft tower 2, and first shaft tower 1 and second shaft tower 2 all include branch 11 and are fixed in two wire jumper cross arms 12 of branch 11 circumference. The cross arm 311 of the linear tension tower far away from one side of the second tower 2 is connected with the jumper cross arm 12 on the first tower 1 positioned at two sides of the linear tension tower through a wire 4, and the cross arm 311 of the linear tension tower near one side of the second tower 2 is connected with the other jumper cross arm 12 of the first tower 1 through a wire 4. Wires 4 are insulated from cross arm 311 and jumper cross arm 12. The end of the wire 4 is connected to the cross arm 311 or the jumper cross arm 12 through the connection fitting 41, and a tension string 42, a tension clamp 43 and a damper 44 are sequentially fixed on the wire 4 and at the end of the connection fitting 41 far from the cross arm 311 or the jumper cross arm 12. The tension string 42 can effectively isolate the live wire 4 from the ground. The strain clamp 43 is used to fix the wire 4 to bear the tension of the wire 4 and hang the wire 4 on the strain insulator-string 42. The damper 44 can reduce vibration caused by wind, reduce fatigue damage of the cross arm 311 caused by bending due to periodic vibration, and improve protection of the cross arm 311.
Referring to fig. 4, cross arm 311 and steel pipe pole 3 are connected by fixing section 5. The fixing portion 5 includes a fixing sleeve 51, a first sleeve 52, a first fixing ring 53, a second sleeve 54, and a second fixing ring 55. The fixing sleeve 51 is fitted over the steel pipe rod 3, and the fixing sleeve 51 and the steel pipe rod 3 are fixedly connected by bolts. The first sleeve 52 is formed at the upper end of the fixed sleeve 51 and is fitted over the steel pipe pole 3. The inner side wall of the first fixing ring 53 is fixedly connected with the outer side wall of the first sleeve 52, and the first fixing ring 53 is located at a position of the first sleeve 52 close to the fixing sleeve 51. The second sleeve 54 is threadedly coupled to the outer sidewall of the first sleeve 52. The inner side wall of the second fixing ring 55 is fixedly connected with the outer side wall of the second sleeve 54, and the second fixing ring 55 is located at a position of the second sleeve 54 far away from the first sleeve 52. Annular grooves 531 are formed in the opposite sides of the first fixing ring 53 and the second fixing ring 55, and the centers of the annular grooves 531 coincide with the center of the steel pipe rod 3. Two positioning blocks 312 are fixed to the end of the cross arm 311, and the two positioning blocks 312 are respectively slidably disposed in the annular groove 531 of the first fixing ring 53 and the annular groove 531 of the second fixing ring 55. The fixed ring hole 532 has all been seted up to the one side that first solid fixed ring 53 and the solid fixed ring 55 kept away from mutually, and fixed hole 532 has seted up a plurality ofly, and a plurality of fixed holes 532 distribute along the first a week annular array of solid fixed ring 53 and the solid fixed ring 55 of second. The end of the cross arm 311 is placed between the first fixing ring 53 and the second fixing ring 55, and is fixed to the fixing portion 5 by passing a bolt through the fixing hole 532 and fixedly connecting the end of the cross arm 311 to the positioning block 312.
Referring to fig. 5, to facilitate connection between lead wire 4 (shown in fig. 3) and cross arm 311, connecting portion 6 is attached to an end of cross arm 311 remote from steel pipe pole 3. The number of the connecting portions 6 is two, and the two connecting portions 6 are respectively mounted on the upper end surface and the lower end surface of the cross arm 311. The connecting portion 6 includes a connecting rod 61 and a connecting ring 62. The connecting rod 61 is vertically arranged on the cross arm 311 and is rotatably connected with the end part of the cross arm 311, and the connecting ring 62 is formed at one end of the connecting rod 61 far away from the cross arm 311.
The implementation principle of the double-loop linear strain tower convenient for pi connection in the embodiment of the application is as follows: when the cable is used, the position of the fixing sleeve 51 is adjusted according to the installation positions of the first tower 1 and the second tower 2, so that the distance between the wire hanging cross arms 311 of different wires 4 is adjusted, and the possibility of winding and knotting among different wires 4 is reduced. Then, the positioning block 312 fixed on the lower end surface of the cross arm 311 is inserted into the annular groove 531 of the first fixing ring 53, by screwing the second sleeve 54 outside the first sleeve 52, so that the second fixing ring 55 presses the end of the cross arm 311 between the first fixing ring 53 and the second fixing ring 55, the positioning block 312 fixed to the upper end surface of the cross arm 311 is inserted into the annular groove 531 of the second fixing ring 55, by moving the cross arm 311, the cross arm 311 is rotated along the center line of the steel pipe pole 3, and after the cross arm 311 is adjusted to a proper position, then a bolt passes through the fixing hole 532 on the first fixing ring 53 and fixes the positioning block 312 on the lower end surface of the cross arm 311 and the first fixing ring 53, by passing another bolt through the fixing hole 532 of the second fixing ring 55 and fixing the upper end positioning block 312 of the cross arm 311 and the second fixing ring 55, the distribution of the cross arm 311 is more reasonable, and the arrangement of the lead 4 connecting the linear tension tower with the first tower 1 and the second tower 2 is more reasonable.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a two return circuit straight line strain insulator tower convenient to pi connects, includes steel-pipe pole (3), locates lightning-arrest line cross arm group (31) on steel-pipe pole (3) and locates wire string cross arm group (32) on steel-pipe pole (3), its characterized in that: three groups of wire hanging cross arm groups (32) are arranged at intervals along the height direction of the steel pipe pole (3); lightning-arrest line cross arm group (31) and wire string line cross arm group (32) all include along three cross arm (311) that steel pipe pole (3) circumference interval set up.
2. The dual-loop linear tension tower convenient for pi connection of claim 1, wherein: the end part of the cross arm (311) is used for being connected with a lead (4) matched with the linear tension tower head; and the lead (4) is provided with an anti-vibration hammer (44).
3. The dual-loop linear tension tower convenient for pi connection of claim 1, wherein: the cross arm (311) is connected with the steel pipe pole (3) through a fixing part (5); the fixing part (5) comprises a first sleeve (52) fixed on the steel pipe rod (3) and a first fixing ring (53) formed on the circumferential direction of the first sleeve (52); the end part of the cross arm (311) is placed on the first fixing ring (53) and is fixedly connected with the first fixing ring (53).
4. The dual-loop linear tension tower convenient for pi connection of claim 3, wherein: a second sleeve (54) is connected to the outer side of the first sleeve (52) in a threaded mode; a second fixing ring (55) is formed on the second sleeve (54); the first fixing ring (53) and the second fixing ring (55) are arranged at intervals; the end part of the cross arm (311) is clamped between the first fixing ring (53) and the second fixing ring (55).
5. The dual-loop linear tension tower convenient for pi connection of claim 4, wherein: annular grooves (531) are formed in the opposite sides of the first fixing ring (53) and the second fixing ring (55); a positioning block (312) which is arranged in the annular groove (531) in a sliding manner is arranged at the end part of the cross arm (311); and two end faces of the positioning block (312) are respectively and fixedly connected with the first fixing ring (53) and the second fixing ring (55).
6. The dual-loop linear tension tower convenient for pi connection of claim 4, wherein: fixing holes (532) are formed in the sides, far away from the first fixing ring (53) and the second fixing ring (55); the fixing holes (532) are provided in a plurality, and the fixing holes (532) are distributed along a circle of the first fixing ring (53) and the second fixing ring (55) in an annular array manner.
7. The dual-loop linear tension tower convenient for pi connection of claim 3, wherein: a fixed sleeve (51) is formed on the lower end face of the first sleeve (52); the fixing sleeve (51) is sleeved on the steel pipe rod (3) and fixedly connected with the steel pipe rod (3) through a bolt.
8. The dual-loop linear tension tower convenient for pi connection of claim 1, wherein: a connecting part (6) for connecting a lead (4) is arranged at the end part of the cross arm (311) far away from the steel pipe pole (3); the number of the connecting parts (6) is two, and the two connecting parts (6) are respectively arranged on the upper end surface and the lower end surface of the cross arm (311); the connecting part (6) comprises a connecting rod (61) rotatably connected with the end part of the cross arm (311) and a connecting ring (62) formed at one end of the connecting rod (61) far away from the cross arm (311).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021425462.5U CN212867076U (en) | 2020-07-17 | 2020-07-17 | Double-loop linear strain tower convenient for pi connection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021425462.5U CN212867076U (en) | 2020-07-17 | 2020-07-17 | Double-loop linear strain tower convenient for pi connection |
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| CN212867076U true CN212867076U (en) | 2021-04-02 |
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| CN202021425462.5U Active CN212867076U (en) | 2020-07-17 | 2020-07-17 | Double-loop linear strain tower convenient for pi connection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113363921A (en) * | 2021-06-07 | 2021-09-07 | 国核电力规划设计研究院有限公司 | Connecting structure and connecting method for single-side pi connection of same-tower multi-circuit overhead transmission line |
-
2020
- 2020-07-17 CN CN202021425462.5U patent/CN212867076U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113363921A (en) * | 2021-06-07 | 2021-09-07 | 国核电力规划设计研究院有限公司 | Connecting structure and connecting method for single-side pi connection of same-tower multi-circuit overhead transmission line |
| CN113363921B (en) * | 2021-06-07 | 2022-10-28 | 国核电力规划设计研究院有限公司 | Connecting structure and connecting method for single-side pi connection of same-tower multi-circuit overhead transmission line |
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