CN210217309U - 220kV double-circuit overhead line straight steel pipe tower - Google Patents
220kV double-circuit overhead line straight steel pipe tower Download PDFInfo
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- CN210217309U CN210217309U CN201920730328.7U CN201920730328U CN210217309U CN 210217309 U CN210217309 U CN 210217309U CN 201920730328 U CN201920730328 U CN 201920730328U CN 210217309 U CN210217309 U CN 210217309U
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- wire
- cross arm
- ground wire
- steel pipe
- string hanging
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 57
- 239000010959 steel Substances 0.000 title claims abstract description 57
- 239000000725 suspension Substances 0.000 claims abstract description 52
- 239000004020 conductor Substances 0.000 description 11
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 230000003796 beauty Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000407 epitaxy Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The utility model relates to a two overhead line straight line steel pipe shaft towers that return of 220kV, include the steel-pipe pole and set gradually the three-layer cross arm on the steel-pipe pole. The three layers of cross arms are a common cross arm of the ground wire and the upper wire, a middle wire cross arm and a lower wire cross arm from top to bottom in sequence. And a ground wire suspension string hanging point is respectively arranged below two ends of the common cross arm of the ground wire and the upper wire. Two vertical rod pieces for the upper wire are symmetrically arranged below the middle section of the common cross arm of the ground wire and the upper wire, and an upper wire suspension string hanging point is arranged below each vertical rod piece for the upper wire. The distance between the ground wire suspension string hanging point and the mounting position of the vertical rod piece for the upper conducting wire on the common cross arm of the ground wire and the upper conducting wire is at least 1 m. And a middle wire suspension string hanging point is respectively arranged below two ends of the middle wire cross arm. And lower wire suspension and string hanging points are respectively arranged below two ends of the lower wire cross arm. The utility model discloses satisfying the atress requirement making shaft tower cross arm intensity, making lead the ground wire cooperation and satisfy icing and lightning protection designing requirement's basis on, realize three-layer cross arm structural design, greatly reduced shaft tower steel consumption and engineering cost.
Description
Technical Field
The utility model relates to an electric power system technical field, concretely relates to two return overhead line straight line steel pipe shaft towers of 220 kV.
Background
In the current 220kV ultrahigh voltage overhead line engineering, a double-circuit line steel pipe tower usually adopts a 4-layer cross arm arrangement mode, wherein the top layer cross arm is a ground wire cross arm, and the lower three layers of cross arms are all wire cross arms. The design mode needs to arrange the ground wire cross arm at the uppermost part of the tower, and the cross arm is longer due to the requirement of the protection angle. For a straight pole, the ground cross-arm is closely spaced to the upper conductor level, typically only about 1.5m, since the conductor overhang string already has a vertical length of about 3 m. Therefore, the longer ground wire cross arm which is close to the upper wire cross arm in vertical distance is only used for mounting two ground wires with smaller load, thereby not only influencing the beauty of the tower, but also increasing the steel consumption of the tower.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a two return overhead line straight line steel pipe shaft tower of 220kV, this steel pipe shaft tower can solve exist among the prior art not enough, satisfies the atress requirement making shaft tower cross arm intensity, makes the ground wire cooperation satisfy the basis of icing and lightning protection designing requirement, realizes three-layer cross arm structural design, greatly reduced shaft tower steel consumption and engineering cost.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a two overhead line straight line steel pipe shaft towers that return of 220kV, includes the steel-pipe pole and sets gradually the three-layer cross arm on the steel-pipe pole. The three layers of cross arms are a common cross arm of a ground wire and an upper wire, a middle wire cross arm and a lower wire cross arm from top to bottom in sequence.
Specifically, a ground wire suspension string hanging point is respectively arranged below two ends of the common cross arm of the ground wire and the upper lead; two vertical rod pieces for the upper conducting wire are symmetrically arranged below the middle section of the common cross arm of the ground wire and the upper conducting wire, and an upper conducting wire suspension string hanging point is arranged below each vertical rod piece for the upper conducting wire; the distance between the ground wire suspension string hanging point and the mounting position of the vertical rod piece for the upper lead on the common cross arm of the ground wire and the upper lead is at least 1 m; a middle wire suspension string hanging point is respectively arranged below two ends of the middle wire cross arm; and lower wire suspension and string hanging points are respectively arranged below two ends of the lower wire cross arm.
Furthermore, the ground wire and the upper conductor sharing cross arm, the middle conductor cross arm and the lower conductor cross arm respectively comprise a left half part and a right half part which are symmetrically arranged along the axial central line of the steel pipe pole and are respectively connected with the steel pipe pole through flanges.
Furthermore, the length of the common cross arm of the ground wire and the upper conducting wire is 10m, the length of the cross arm of the middle conducting wire is 10m, the length of the cross arm of the lower conducting wire is 8m, and the length of the vertical rod piece for the upper conducting wire is 1.6 m; the vertical distance between the upper lead suspension string hanging point and the middle lead suspension string hanging point and the vertical distance between the middle lead suspension string hanging point and the lower lead suspension string hanging point are both 6 m.
Furthermore, a connecting flange is respectively arranged below two sides of the middle section of the common cross arm for the ground wire and the upper lead, and a connecting bolt hole is formed in the connecting flange; the top of the vertical rod piece for the upper lead is connected with the connecting flange through a bolt; the upper wire suspension point comprises two steel plates which are parallel to each other and welded at the bottom of the vertical rod piece for the upper wire.
Furthermore, the ground wire suspension string hanging point comprises two semi-annular steel plates which are parallel to each other, and the ground wire suspension string hanging point is welded below the end part of the common cross arm of the ground wire and the upper lead; and the ground wire suspension string hanging point is provided with a through hole for passing through a tower-connecting hardware fitting for suspending a lead.
Furthermore, a through hole for the tower-connecting hardware fitting for hanging the lead to penetrate through is formed in the upper lead suspension point.
Furthermore, two parallel arrangement's steel sheet is all installed to the both ends below of well wire cross arm and lower wire cross arm, and offers the through-hole that is used for installing the wire gold utensil cluster on this steel sheet.
According to the technical scheme provided by the utility model, the utility model discloses a with ground wire cross arm and upper wire cross arm merging design to this ground wire of redesign and last wire sharing cross arm make shaft tower cross arm intensity satisfy the atress requirement, make the ground wire cooperation satisfy icing and lightning protection design requirement. The utility model discloses reduce shaft tower steel consumption volume, the cost is reduced.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a front view of the right half of the cross arm shared by the ground and upper conductors;
FIG. 3 is a bottom view of the right half of the cross arm shared by the ground wire and the upper conductor;
fig. 4 is a front view of the vertical bar for upper conductor.
Wherein:
1. the steel pipe pole, 2, ground wire and last wire sharing cross arm, 3, well wire cross arm, 4, lower wire cross arm, 5, the ground wire hangs the cluster and hangs the string and hang the point, 6, the perpendicular member bar for the last wire, 7, the last wire hangs the cluster and hang the point, 8, well wire hangs the cluster and hang the point, 9, the lower wire hangs the cluster and hang the point, 10, flange, 11, connecting bolt hole.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
the 220kV double-circuit overhead line straight steel pipe tower shown in the figures 1 to 4 comprises a steel pipe pole and three layers of cross arms sequentially arranged on the steel pipe pole. The three layers of cross arms are a common cross arm of a ground wire and an upper wire, a middle wire cross arm and a lower wire cross arm from top to bottom in sequence.
Specifically, a ground wire suspension string hanging point is respectively arranged below two ends of the common cross arm of the ground wire and the upper lead; two vertical rod pieces for the upper wire are symmetrically arranged below the middle section of the common cross arm of the ground wire and the upper wire, and an upper wire suspension string hanging point is arranged below each vertical rod piece for the upper wire. The distance between the ground wire suspension string hanging point and the mounting position of the vertical rod piece for the upper conducting wire on the common cross arm of the ground wire and the upper conducting wire is at least 1 m. The distance is set to prevent the wire suspension string from drooping downwards when the ice is covered, and if the distance is staggered by 1m, the wire suspension string does not touch the lower wire even if the ice skate of the upper hardware string droops, because the horizontal distance is 1 m. A middle wire suspension string hanging point is respectively arranged below two ends of the middle wire cross arm; and lower wire suspension and string hanging points are respectively arranged below two ends of the lower wire cross arm. The steel pipe pole is used for supporting the cross arm connected with the steel pipe pole and ensuring the relative distance of the cross arm. And the middle wire cross arm and the lower wire cross arm are used for hanging wires. The ground wire and the upper conducting wire share a cross arm and are used for hanging the ground wire and the conducting wire. The vertical rod piece for the upper conducting wire is used for hanging the upper conducting wire. And a proper hole is reserved on the wire suspension serial hanging point and is used for passing through a tower connecting hardware fitting for suspending a wire. And appropriate holes are reserved on the ground wire suspension serial hanging points and used for penetrating through the tower-connecting hardware fitting for suspending the ground wire.
Furthermore, the ground wire and the upper conductor sharing cross arm, the middle conductor cross arm and the lower conductor cross arm respectively comprise a left half part and a right half part which are symmetrically arranged along the axial central line of the steel pipe pole and are respectively connected with the steel pipe pole through flanges. The inner end of the cross arm of each half part is provided with a flange, and the side walls of the left side and the right side of the steel pipe pole are respectively provided with a flange. The flanges on the cross arms are connected with the flanges on the steel pipe pole through bolts, so that each half cross arm is installed on the steel pipe pole.
Furthermore, the length of the common cross arm of the ground wire and the upper conducting wire is 10m, the length of the cross arm of the middle conducting wire is 10m, the length of the cross arm of the lower conducting wire is 8m, and the length of the vertical rod piece for the upper conducting wire is 1.6 m. That is, as shown in fig. 1, the left half and the right half of the ground wire and the upper wire sharing cross arm are both 5m in length, the left half and the right half of the middle wire cross arm are both 5m in length, and the left half and the right half of the lower wire cross arm are both 4m in length. The length of the vertical rod piece for the upper conducting wire is 1.6m, and the vertical distance between the upper conducting wire suspension string hanging point and the middle conducting wire suspension string hanging point and the vertical distance between the middle conducting wire suspension string hanging point and the lower conducting wire suspension string hanging point are both 6 m.
Furthermore, a connecting flange is respectively arranged below two sides of the middle section of the common cross arm for the ground wire and the upper lead, and a connecting bolt hole is formed in the connecting flange; the top of the vertical rod piece for the upper lead is connected with the connecting flange through a bolt; the upper wire suspension point comprises two steel plates which are parallel to each other and welded at the bottom of the vertical rod piece for the upper wire. The ground wire and the upper wire share the cross arm and are connected with the vertical rod piece for the upper wire by a flange. Because the load of the lead on the linear tower is mainly horizontal wind load, vertical dead weight and ice-coated load, the stress state of the vertical rod piece for the upper lead is in tension and bending, and the vertical rod piece can not be stressed, so that the characteristic of good tension performance of steel can be fully exerted. When the flanges are connected, the bolts are loose-proof by adopting double caps, and the nuts are placed on the upper parts of the connecting flanges to prevent the threads from falling off.
Furthermore, the ground wire suspension string hanging point comprises two semi-annular steel plates which are parallel to each other, and the ground wire suspension string hanging point is welded below the end part of the common cross arm of the ground wire and the upper lead; and the ground wire suspension string hanging point is provided with a through hole for passing through a tower-connecting hardware fitting for suspending a lead.
Furthermore, a through hole for the tower-connecting hardware fitting for hanging the lead to penetrate through is formed in the upper lead suspension point.
Furthermore, two parallel arrangement's steel sheet is all installed to the both ends below of well wire cross arm and lower wire cross arm, and offers the through-hole that is used for installing the wire gold utensil cluster on this steel sheet.
The design principle of the utility model is that:
a conventional double-loop linear steel pipe pole usually adopts four layers of cross arms, the vertical distance between a ground wire cross arm and an upper lead cross arm is very short, the ground wire cross arm is only additionally hung with two ground wires, the load bearing capacity of the ground wire cross arm is relatively small, the protection range of the ground wires to the leads needs to meet the lightning protection requirement of a 0-degree protection angle, the ground wire cross arm in an ice-covered area needs to be consistent with the longest 1 lead cross arm, and the ground wire cross arm is very long. The utility model discloses merge sharing one deck cross arm with ground wire and last wire to save the one deck cross arm, still need satisfy following several points when this shaft tower design simultaneously in order to satisfy the requirement of rule standard to lightning protection and anti-icing sudden strain of a muscle:
(1) the protection angle of the ground wire to the lead wire is not more than 0 degree.
(2) In the ice-covered area, the horizontal offset between the ground wire and the upper lead is not less than 1 m.
(3) The distance between two ground wires on the tower is not more than 5 times of the vertical distance between the ground wire and the lead.
(4) In the center of the span of a general span, the distance between the conducting wire and the ground should be not less than S ≧ 0.012L +1m (L represents the span).
(5) The wires must be within the lightning overvoltage protection range of two parallel grounds.
Taking a 2E2-2 type linear steel pipe pole as an example, the steel pipe pole is used for mounting 2 XJLG 1A-400/35 conducting wires, an I-shaped conducting wire suspension string is adopted, the ice coating thickness is 10mm, the wind speed is 25m/s, the representative span is 250m, and the maximum using span is 250 m. After the improvement, the common cross arm of the ground wire and the upper wire on one side is 5m, in order to meet the requirement that the horizontal deviation of the ground wire and the upper wire is not less than 1m in an ice-covered area, a vertical rod piece for the wire is additionally arranged at the position, close to the end part 1m, of the common cross arm of the ground wire and the upper wire, a wire hanging point is arranged at the lower end of the common cross arm of the ground wire and the upper wire, the lengths of the middle wire cross arm and the lower wire cross arm are respectively 5m and 4m, and the horizontal distance between the ground wires of adjacent layers is. The length of the vertical rod piece for the wire is adjusted to 1.6m, the vertical distance between the hanging point of the upper wire and the hanging point of the ground wire is 1.6m, and after the length of the insulator string is about 2.4m, the vertical distance between the upper wire and the ground wire is ensured to be 4m, so that the distance between the central wire of the span and the ground wire under the maximum use span of 250m is not less than S which is not less than 0.012L +1m (L represents the span). In addition, the vertical distance of the wire hanging points of adjacent layers is still 6 m. After calculation and the adoption of the design scheme, the lightning protection requirement that the lead is required to be within the lightning overvoltage protection range of two parallel ground wires can be ensured. Furthermore, the utility model discloses can be seen as having increased two perpendicular members for the wire on original place line cross arm basis, every quality is about 15kg, simultaneously because this support needs to be strengthened, every quality increases about 100kg, increases about 230kg of steel altogether. But reduces a layer of two wire cross arms, each wire has the mass of about 315kg, and the steel is saved by about 630 kg. Therefore, the steel material is directly saved by about 400kg per base pole tower, and the main pole and the base size of the steel pipe pole can be correspondingly reduced due to the reduction of the weight of the cross arm. The utility model discloses not only the shaft tower design is more pleasing to the eye, has reduced engineering cost moreover remarkably. The ground wire cross arm and the upper wire cross arm are concentrated on the same cross arm, the distance requirement of the specification of the Achate is considered, and great technical difficulty is brought. The distance between the three layers of cross arms in the vertical direction has strict requirements, for a 220kV tower epitaxy, after a wire hardware string and a wire are hung, the distance between the wire and any point of a tower is not less than 2.3m in a static state, the distance between the wire and any point of the tower is not less than 1.45m under blowing at a wind speed of 10m/s, and the distance between the wire and any point of the tower is not less than 0.55m at the maximum wind speed.
The above-mentioned embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.
Claims (7)
1. The utility model provides a two overhead line straight line steel pipe shaft towers that return of 220kV which characterized in that: the steel pipe comprises a steel pipe rod and three layers of cross arms which are sequentially arranged on the steel pipe rod; the three layers of cross arms are sequentially a common cross arm of a ground wire and an upper wire, a middle wire cross arm and a lower wire cross arm from top to bottom;
a ground wire suspension string hanging point is respectively arranged below two ends of the common cross arm of the ground wire and the upper conducting wire; two vertical rod pieces for the upper conducting wire are symmetrically arranged below the middle section of the common cross arm of the ground wire and the upper conducting wire, and an upper conducting wire suspension string hanging point is arranged below each vertical rod piece for the upper conducting wire; the distance between the ground wire suspension string hanging point and the mounting position of the vertical rod piece for the upper lead on the common cross arm of the ground wire and the upper lead is at least 1 m; a middle wire suspension string hanging point is respectively arranged below two ends of the middle wire cross arm; and lower wire suspension and string hanging points are respectively arranged below two ends of the lower wire cross arm.
2. The 220kV double-circuit overhead line straight steel pipe tower of claim 1, which is characterized in that: the ground wire and the upper lead sharing cross arm, the middle lead cross arm and the lower lead cross arm respectively comprise a left half part and a right half part which are symmetrically arranged along the axial central line of the steel pipe rod and are respectively connected with the steel pipe rod through flanges.
3. The 220kV double-circuit overhead line straight steel pipe tower of claim 1, which is characterized in that: the length of the common cross arm of the ground wire and the upper conducting wire is 10m, the length of the cross arm of the middle conducting wire is 10m, the length of the cross arm of the lower conducting wire is 8m, and the length of the vertical rod piece for the upper conducting wire is 1.6 m; the vertical distance between the upper lead suspension string hanging point and the middle lead suspension string hanging point and the vertical distance between the middle lead suspension string hanging point and the lower lead suspension string hanging point are both 6 m.
4. The 220kV double-circuit overhead line straight steel pipe tower of claim 1, which is characterized in that: a connecting flange is respectively arranged below two sides of the middle section of the common cross arm for the ground wire and the upper lead, and a connecting bolt hole is formed in the connecting flange; the top of the vertical rod piece for the upper lead is connected with the connecting flange through a bolt; the upper wire suspension point comprises two steel plates which are parallel to each other and welded at the bottom of the vertical rod piece for the upper wire.
5. The 220kV double-circuit overhead line straight steel pipe tower of claim 1, which is characterized in that: the ground wire suspension string hanging point comprises two semi-annular steel plates which are parallel to each other, and the ground wire suspension string hanging point is welded below the end part of the common cross arm of the ground wire and the upper lead; and the ground wire suspension string hanging point is provided with a through hole for passing through a tower-connecting hardware fitting for suspending a lead.
6. The 220kV double-circuit overhead line straight steel pipe tower of claim 1, which is characterized in that: and the upper wire suspension point is provided with a through hole for the tower-connecting hardware fitting for suspending the wire to pass through.
7. The 220kV double-circuit overhead line straight steel pipe tower of claim 1, which is characterized in that: two steel plates which are arranged in parallel are arranged below two ends of the middle wire cross arm and the lower wire cross arm, and through holes used for installing wire hardware fitting strings are formed in the steel plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920730328.7U CN210217309U (en) | 2019-05-21 | 2019-05-21 | 220kV double-circuit overhead line straight steel pipe tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920730328.7U CN210217309U (en) | 2019-05-21 | 2019-05-21 | 220kV double-circuit overhead line straight steel pipe tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210217309U true CN210217309U (en) | 2020-03-31 |
Family
ID=69927597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920730328.7U Expired - Fee Related CN210217309U (en) | 2019-05-21 | 2019-05-21 | 220kV double-circuit overhead line straight steel pipe tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210217309U (en) |
-
2019
- 2019-05-21 CN CN201920730328.7U patent/CN210217309U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200331 |
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| CF01 | Termination of patent right due to non-payment of annual fee |