CN213742621U - 500kV single-loop cat-shaped tower iron tower with cross arm for opening and closing - Google Patents
500kV single-loop cat-shaped tower iron tower with cross arm for opening and closing Download PDFInfo
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- CN213742621U CN213742621U CN202022395807.3U CN202022395807U CN213742621U CN 213742621 U CN213742621 U CN 213742621U CN 202022395807 U CN202022395807 U CN 202022395807U CN 213742621 U CN213742621 U CN 213742621U
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Abstract
The utility model relates to a tower for power transmission line, in particular to a 500kV single-loop cat-shaped tower breaking iron tower with a cross-shaped cross arm, which comprises a tower body, a top layer ground wire frame, an upper layer wire cross arm, a middle layer wire cross arm and a lower layer wire cross arm, wherein the top layer ground wire frame and the lower layer wire cross arm are cross-shaped cross arms; the top-layer ground wire frame of the cross-shaped structure comprises a transverse ground wire frame and a longitudinal ground wire frame, the wire hanging point of the transverse ground wire frame is higher than that of the longitudinal ground wire frame, the lower-layer wire cross arm of the cross-shaped structure comprises a transverse lower-layer cross arm and a longitudinal lower-layer cross arm, and the wire hanging point of the longitudinal lower-layer cross arm is higher than that of the transverse lower-layer cross arm; the upper layer wire cross arm and the middle layer wire cross arm are transversely arranged. The utility model has the advantages that: effectively shortens the construction period, reduces the construction power-off time, and reduces the line investment and the construction difficulty.
Description
Technical Field
The utility model relates to a shaft tower for power transmission line, especially a take 500kV of cross arm single return cat shape tower iron tower for cut-off.
Background
With the continuous development and improvement of grid frames of power grids, line corridor resources are increasingly scarce, and in order to reduce the difficulty of creating a new line corridor, a newly-built substation usually adopts a mode that a built line is connected after being cut off nearby.
At present, as for a mode of accessing a transformer substation after a built single-circuit line is disconnected, referring to fig. 1, a two-base single-circuit corner tower (T1, T2) is generally newly built below the built line, the line of the built line located in the middle of the two-base corner tower is disconnected, then the two disconnected sides of the built line are respectively accessed to the newly-built double-circuit branch corner tower T3 through the two-base single-circuit corner tower, and a ground lead and a hardware between the two-base single-circuit corner towers are removed at the same time, so that the function of disconnecting the single-circuit line is realized. However, the above-mentioned techniques have disadvantages in that: 1) two single-loop angle towers (T1 and T2) for disconnection are required to be newly built below the original built line, the construction period is long, and the construction power failure time of the disconnected line is increased; 2) when two single-circuit angle towers for disconnection are respectively connected to a double-circuit branch tower, two path galleries need to be newly created, so that not only is the investment of the line increased, but also the expenses and the difficulty of the settlement of the tower foundation and the blue and green claims of the line galleries are increased, and the engineering construction period is possibly increased.
Disclosure of Invention
An object of the utility model is to provide a 500kV single-circuit cat-shaped tower of taking cross arm of effectively shortening construction period, reducing construction power off time, reducing the development of route corridor, reducing the line investment and the construction degree of difficulty and use iron tower for the cut-off according to prior art's weak point.
The purpose of the utility model is realized through the following ways:
a500 kV single-loop cat-shaped tower iron tower with a cross arm for breaking comprises a tower body, a top layer ground wire frame, an upper layer wire cross arm, a middle layer wire cross arm and a lower layer wire cross arm, wherein the top layer ground wire frame, the upper layer wire cross arm, the middle layer wire cross arm and the lower layer wire cross arm are arranged on the upper part of the tower body; the top-layer ground wire frame with the cross-shaped structure comprises a transverse ground wire frame and a longitudinal ground wire frame, the wire hanging point of the transverse ground wire frame is higher than that of the longitudinal ground wire frame, the two sides of the longitudinal ground wire frame are respectively connected with the ground wires of the I-loop circuit and the II-loop circuit, and the transverse ground wire frame is connected with the ground wires of the double-loop branch tangent tower in a hanging manner; the lower-layer wire cross arm with the cross-shaped structure comprises a transverse lower-layer cross arm and a longitudinal lower-layer cross arm, and the hanging line point of the longitudinal lower-layer cross arm is higher than that of the transverse lower-layer cross arm; the upper layer wire cross arm and the middle layer wire cross arm are transversely arranged;
single-loop A-phase wires of the I loop circuit and the II loop circuit are respectively hung on front side hanging points at the left end and the right end of an upper layer wire cross arm, double-loop A-phase wires connected with a double-loop branch tangent tower are respectively hung on rear side hanging points at the left end and the right end of the upper layer wire cross arm, the single-loop A-phase wires and the double-loop A-phase wires are vertically distributed, and two vertically distributed wires hung on the same left side and the same right side of the upper layer wire cross arm are connected through flexible jumper wires;
the single-circuit B-phase wires of the I circuit and the II circuit are respectively hung on the left hanging point and the right hanging point on the front side of the longitudinal lower layer cross arm, the double-circuit B-phase wires connected with the double-circuit branch tangent tower are respectively hung on the rear hanging points on the left end and the right end of the middle layer wire cross arm, the single-circuit B-phase wires and the double-circuit B-phase wires are vertically distributed, and the two vertically distributed wires corresponding to the same left side and the same right side of the middle layer wire cross arm are connected through a wind-proof bias jumper wire;
the single-circuit C-phase wires of the I-circuit line and the II-circuit line are respectively hung on the left hanging point and the right hanging point on the rear side of the longitudinal lower-layer cross arm, the double-circuit C-phase wires connected with the double-circuit branch tangent tower are respectively hung on the rear hanging points on the left end and the right end of the transverse lower-layer cross arm, the single-circuit C-phase wires and the double-circuit C-phase wires are vertically distributed, and the two vertically distributed wires corresponding to the same left side and the same right side of the transverse lower-layer cross arm are connected through flexible jumper wires.
"horizontal", "vertical", "front side", "rear side" are for stating relative position: the original direction of the line to be cut off is taken as the horizontal direction, and the vertical direction of the cross structure is taken as the longitudinal direction; the front side of the transverse wire cross arm or the longitudinal lower layer cross arm is the side far away from the double-loop branch tangent tower, and the rear side is the side close to the double-loop branch tangent tower. In addition, the three phases of the A, B, C-phase system are for convenience of describing the connection mode of the three-phase wires, and are not limited to the corresponding phase wire connection, and the corresponding connection can be performed according to the actual phase wires distributed from top to bottom.
Therefore, the utility model discloses the iron tower of cross arm is taken in the department of cutting off construction of having built the circuit, under the safe distance requirement of each wire regulation, set up the connection of each looks wire through the wire jumper, thereby realize being connected to two return circuit branch tangent towers from the I return circuit and the II return circuit of cutting off, the construction of 1 basic single circuit transfer tower has been reduced, reduce the development of a route corridor simultaneously, and need not to demolish old line, effectively shorten construction period, reduce the construction blackout time, and reduced the line investment and the construction degree of difficulty. Additionally, the utility model discloses after the iron tower of cross arm is taken in the adoption, because the equal sharp connection double circuit branch tower of two-circuit three-phase wire, consequently this double circuit branch tower only need according to conventional double circuit tangent tower construction can, need not to build into the corner tower, and the tangent tower weight is less than the corner tower, consequently can further reduce construction period in the aspect of the construction, practices thrift the steel consumptive material.
The utility model discloses can further specifically do:
in the top-layer ground wire frame with the cross-shaped structure, the length of the longitudinal ground wire frame is consistent with that of the ground wire frame of the tower on the built line, and the transverse ground wire frame and the longitudinal ground wire frame share the root of the cross arm on the tower body.
The left side and the right side of the longitudinal ground wire frame are respectively used for connecting the ground wires of the loop I and the loop II of the broken line, and the hanging points are used for ensuring that the ground wires of the broken line are straight, so that the length of the ground wire frame is consistent with that of the ground wire frame of the tower on the broken established line. The height difference between the transverse ground wire frame and the longitudinal ground wire frame ensures that the ground wires in different directions touch each other, thereby meeting the safety requirement between the lines. The cross arm root on common body of the tower is the cross arm connecting part that the same position set up on the body of the tower, and the cross arm is connected for both sides to general shaft tower, the cross arm then is four sides connection cross arms.
In the lower-layer wire cross arm with the cross-shaped structure, the length of the longitudinal lower-layer cross arm is consistent with that of the cross arm of the tower on the built line, and the transverse lower-layer cross arm and the longitudinal lower-layer cross arm share the root of the cross arm on the tower body.
The length of the longitudinal lower cross arm is also set to ensure the straightness of the broken wires of each phase because the longitudinal lower cross arm is respectively connected with the broken wires of the two phases of the I loop and the II loop.
In the lower layer wire cross arm with the cross-shaped structure, the longitudinal lower layer cross arm is of an inverted trapezoid structure, and the transverse lower layer cross arm is of a regular trapezoid structure.
The positive trapezoid is short on the upper side and long on the lower side, and the reverse trapezoid is opposite, but the heights of the trapezoid structures of the positive trapezoid and the reverse trapezoid are consistent, so that the height difference between the transverse lower layer cross arm and the longitudinal lower layer cross arm is the trapezoid height, and the wires in different directions are effectively prevented from touching.
And two ends of the middle-layer wire cross arm are provided with wind deflection prevention jumper wire insulation strings, one end of the wind deflection prevention jumper wire is connected with the disconnected single-circuit B-phase wire, and the other end of the wind deflection prevention jumper wire is connected to a corresponding side wire in the newly-built double-circuit B-phase wire through the wind deflection prevention jumper wire insulation strings.
The B-phase conductor adopts a connection mode of jumping to the middle-layer cross arm through the lower-layer cross arm, so that the enough safety distance can be kept for both the access of a cut-off line and the access of a newly-built line. In addition, the tension string of the established line and the tension string of the newly-built line are vertically arranged in space, so that the two loops of conducting wires after the established line is disconnected are connected to the newly-built line.
To sum up, the utility model provides a take 500kV single return cat shape tower of cross arm iron tower for cut-off is through top layer earth-line frame and the lower floor's wire cross arm that sets up the cross structure on the shaft tower for cut-off line can carry out the circuit switching through the cross arm on ensureing safe distance and construction requirement basis, so that single straight-line connection is to the two-circuit branch tangent tower in the newly-built circuit. From this the utility model discloses with newly-built 2 basic single circuit corner towers and 1 basic two return circuit branch corner towers of needs, need newly open two circuit galleries and demolish the engineering volume of leading ground wire and gold utensil between the two single circuit break-off towers simultaneously, optimize for the corner tower and the 1 basic two circuit tangent towers that only need newly-built 1 baseband cross arm, newly-open a circuit corridor, need not to demolish old line, effectively shorten construction period, reduce the construction blackout time, reduce the development of route gallery, reduce the line investment and the construction degree of difficulty.
Drawings
Fig. 1 is a schematic diagram of a wiring structure after a built circuit is disconnected in the background art of the present invention;
fig. 2 is a schematic three-dimensional structure diagram of a 500kV single-circuit cat-shaped tower breaking iron tower with a cross arm of the present invention;
fig. 3 is a schematic front view (transverse) structural diagram of the iron tower for breaking with a cross-shaped cross arm of the present invention;
fig. 4 is a schematic front view (longitudinal) structural diagram of the iron tower for breaking with a cross arm of the present invention;
FIG. 5 is a schematic plan view of the cross-shaped top floor rack of the present invention;
fig. 6 is a schematic view of a ground wire connection structure of a top-layer ground wire frame with a cross-shaped structure according to the present invention;
fig. 7 is a schematic plan view of the lower layer wire cross arm of the cross-shaped structure of the present invention;
fig. 8 is a schematic diagram of a plane wiring structure for hanging a phase a wire on the upper layer wire cross arm of the present invention;
fig. 9 is a schematic plan wiring structure diagram of the present invention for hanging the B-phase wires on the middle layer wire cross arm and the lower layer wire cross arm;
fig. 10 is a schematic view of a vertical-surface wiring structure for hanging a B-phase wire on a middle-layer wire cross arm and a lower-layer wire cross arm according to the present invention;
fig. 11 is a schematic view of a planar wiring structure for hanging a C-phase wire on a lower-layer wire cross arm according to the present invention;
fig. 12 is a schematic view of a vertical-surface wiring structure for hanging a C-phase wire on a lower-layer wire cross arm according to the present invention;
fig. 13 is the utility model discloses a take 500kV single time cat shape tower for the cut-off iron tower of cross arm to use the wiring structure sketch map of the circuit of cutting off and newly-built circuit down.
The present invention will be further described with reference to the following examples.
Detailed Description
The best embodiment is as follows:
referring to the attached figures 2-5 and 7, the 500kV single-loop cat-shaped tower breaking iron tower with the cross arms comprises a tower body, and a top layer ground wire frame 1, an upper layer wire cross arm 2, a middle layer wire cross arm 3 and a lower layer wire cross arm 4 which are arranged on the upper portion of the tower body, wherein a built circuit is broken into a circuit I and a circuit II, and the top layer ground wire frame 1 and the lower layer wire cross arm 4 are both cross arms with cross structures. The top-layer ground wire frame 1 with the cross-shaped structure comprises a transverse ground wire frame 11 and a longitudinal ground wire frame 12, the wire hanging point of the transverse ground wire frame 11 is higher than that of the longitudinal ground wire frame 12, and the transverse ground wire frame 11 and the longitudinal ground wire frame 12 share the cross arm root on the tower body. The lower-layer wire cross arm 4 with the cross-shaped structure comprises a transverse lower-layer cross arm 41 and a longitudinal lower-layer cross arm 42, the longitudinal lower-layer cross arm 42 is of an inverted trapezoid structure, the transverse lower-layer cross arm 41 is of a regular trapezoid structure, and the transverse lower-layer cross arm 41 and the longitudinal lower-layer cross arm 42 share the cross arm root on the tower body. The length of the longitudinal lower-layer cross arm 42 is parallel to that of the cross arm of the tower on the built line and is consistent with that of the cross arm, and the length of the transverse lower-layer cross arm 41 is parallel to that of the double-loop branch tangent tower on the newly-built line and is equal to that of the cross arm. The upper layer wire cross arm 2 and the middle layer wire cross arm 3 are transversely arranged.
As shown in fig. 6, in the top-level ground frame with the cross-shaped structure, the length of the longitudinal ground frame 12 is parallel to and consistent with that of the ground frame of the tower on the built line, and the length of the transverse ground frame 11 is equal to that of the ground frame of the double-loop (I-loop/II-loop) branch tangent tower on the newly-built line. The two sides of the longitudinal ground wire frame 12 are respectively connected with the ground wires of the circuit breaking I loop and the circuit breaking II loop, and the transverse ground wire frame 11 is connected with the newly built I loop and the newly built II loop ground wires of the double-loop branch tangent tower in a hanging mode.
As shown in fig. 8, the single-circuit a-phase wires of the open I-circuit and the open II-circuit are respectively hooked to the front side hanging points 21 at the left and right ends of the upper-layer wire cross arm 2, the newly-built I-circuit and the newly-built II-circuit a-phase wires connected to the dual-circuit branched tangent tower are respectively hooked to the rear side hanging points 22 at the left and right ends of the upper-layer wire cross arm, the open two-circuit a-phase wires and the newly-built dual-circuit a-phase wires are vertically distributed, and the two vertically-distributed wires hooked on the same left side and the same right side of the upper-layer wire cross arm 2 are connected in a straight-jump manner (without a suspended jumper string in the middle) through the flexible jumper 23.
Referring to the attached fig. 9-10, the two ends of the middle layer wire cross arm are provided with windage yaw jumper wire insulation strings 31, the single-circuit B-phase wires of the cut-off I circuit and the cut-off II circuit are respectively hung on the left and right hanging points on the front side of the longitudinal lower layer cross arm 42, the newly-built I circuit and the newly-built II circuit B-phase wires connected with the double-circuit branch tangent tower are respectively hung on the rear hanging points on the left and right ends of the middle layer wire cross arm 3, the cut-off single-circuit B-phase wires and the newly-built B-phase wires are vertically distributed, the two vertically distributed break-new wires corresponding to the same left side and the same right side of the middle layer wire cross arm 3 are connected by a wind deflection preventing jumper wire 32, one end of the windage yaw jumper 32 is connected with the disconnected B-phase conductor at the longitudinal lower layer cross arm 42, and the other end is connected to the middle layer conductor cross arm 3 through the windage yaw jumper insulation string 31 in a winding way so as to be connected to the corresponding return conductor in the newly-built B-phase conductor.
Referring to fig. 11-12, in the lower wire cross arm of the cross-shaped structure, the hanging wire point of the longitudinal lower cross arm 42 is higher than that of the transverse lower cross arm 41, and the height difference is the height of the trapezoidal structure and is arranged in an upper layer and a lower layer. The single-circuit C-phase wires for cutting off the I-circuit line and the II-circuit line are respectively hung on the left hanging point and the right hanging point on the rear side of the longitudinal lower layer cross arm 42, the newly-built I-circuit and the newly-built II-circuit C-phase wires for connecting the double-circuit branch linear tower are respectively hung on the rear hanging points on the left end and the right end of the transverse lower layer cross arm 41, the cut-off I/II-circuit C-phase wires and the cut-off I/II-circuit C-phase wires are vertically distributed, and the two wires which are vertically distributed on the same left side and the same right side of the transverse lower layer cross arm are correspondingly connected through a T-shaped wire clamp and a jumper 43.
To sum up, take 500kV single time cat shape tower for cut-off of cross arm to use the wiring of cutting off the circuit and newly-built circuit under the iron tower is used as shown in figure 13, need newly-built branch corner tower T4 and 1 base double circuit tangent tower T5 of 1 base band cross arm, effectively reduced the time and the harmonious degree of difficulty of column foot expropriation ground, the blue or green claim in corridor, construction power failure, also reduced the influence to the environment. The utility model discloses take iron tower side (vertical one side) of cross arm just to being cut off single circuit line, its vertical lower floor's cross arm/ground wire frame be on a parallel with by the cross arm of the shaft tower on the circuit of cutting off, can avoid taking place alternately on the circuit three-phase conductor space of cutting off, simultaneously because the shaft tower side is unanimous with by the circuit arrangement mode of cutting off, can effectively avoid taking place the problem that electric rocking angle is not enough by the tangent tower that the circuit is close to of cutting off. Additionally, the embodiment of the utility model provides an all adopt the strain insulator-string mode of articulating in the wire connection, the thick line of hanging point department of each looks wire shows for the insulating cluster of strain insulator in the attached drawing.
The part of the utility model which is not described is the same as the prior art.
Claims (5)
1. A500 kV single-loop cat-shaped tower iron tower with a cross arm for breaking comprises a tower body, a top layer ground wire frame, an upper layer wire cross arm, a middle layer wire cross arm and a lower layer wire cross arm, wherein the top layer ground wire frame, the upper layer wire cross arm, the middle layer wire cross arm and the lower layer wire cross arm are arranged on the upper part of the tower body; the top-layer ground wire frame with the cross-shaped structure comprises a transverse ground wire frame and a longitudinal ground wire frame, the wire hanging point of the transverse ground wire frame is higher than that of the longitudinal ground wire frame, the two sides of the longitudinal ground wire frame are respectively connected with the ground wires of the I-loop circuit and the II-loop circuit, and the transverse ground wire frame is connected with the ground wires of the double-loop branch tangent tower in a hanging manner; the lower-layer wire cross arm with the cross-shaped structure comprises a transverse lower-layer cross arm and a longitudinal lower-layer cross arm, and the hanging line point of the longitudinal lower-layer cross arm is higher than that of the transverse lower-layer cross arm; the upper layer wire cross arm and the middle layer wire cross arm are transversely arranged;
single-loop A-phase wires of the I loop circuit and the II loop circuit are respectively hung on front side hanging points at the left end and the right end of an upper layer wire cross arm, double-loop A-phase wires connected with a double-loop branch tangent tower are respectively hung on rear side hanging points at the left end and the right end of the upper layer wire cross arm, the single-loop A-phase wires and the double-loop A-phase wires are vertically distributed, and two vertically distributed wires hung on the same left side and the same right side of the upper layer wire cross arm are connected through flexible jumper wires;
the single-circuit B-phase wires of the I circuit and the II circuit are respectively hung on the left hanging point and the right hanging point on the front side of the longitudinal lower layer cross arm, the double-circuit B-phase wires connected with the double-circuit branch tangent tower are respectively hung on the rear hanging points on the left end and the right end of the middle layer wire cross arm, the single-circuit B-phase wires and the double-circuit B-phase wires are vertically distributed, and the two vertically distributed wires corresponding to the same left side and the same right side of the middle layer wire cross arm are connected through a wind-proof bias jumper wire;
the single-circuit C-phase wires of the I-circuit line and the II-circuit line are respectively hung on the left hanging point and the right hanging point on the rear side of the longitudinal lower-layer cross arm, the double-circuit C-phase wires connected with the double-circuit branch tangent tower are respectively hung on the rear hanging points on the left end and the right end of the transverse lower-layer cross arm, the single-circuit C-phase wires and the double-circuit C-phase wires are vertically distributed, and the two vertically distributed wires corresponding to the same left side and the same right side of the transverse lower-layer cross arm are connected through flexible jumper wires.
2. The tower with cross arms for disconnecting the 500kV single-loop cat-shaped tower as claimed in claim 1, wherein the length of the longitudinal ground wire frame in the top ground wire frame of the cross-shaped structure is the same as that of the ground wire frame of the tower on the built line, and the transverse ground wire frame and the longitudinal ground wire frame share the root of the cross arm on the tower body.
3. The tower with cross-shaped cross arms for disconnecting the 500kV single-loop cat-shaped tower as claimed in claim 1, wherein the length of the longitudinal lower cross arm in the lower wire cross arm with the cross-shaped structure is the same as that of the cross arm of the tower on the built line, and the transverse lower cross arm and the longitudinal lower cross arm share the root of the cross arm on the tower body.
4. The tower of claim 1, wherein the lower cross-shaped wire cross-arm has an inverted trapezoid-shaped longitudinal cross-arm and a regular trapezoid-shaped transverse cross-arm.
5. The tower for breaking 500kV single-circuit cat-shaped towers with cross arms as claimed in claim 1, wherein wind-bias-proof jumper wire insulation strings are arranged at two ends of the middle layer wire cross arm, one end of the wind-bias-proof jumper wire is connected with a single-circuit B-phase wire, and the other end of the wind-bias-proof jumper wire is connected to a corresponding side wire of a double-circuit B-phase wire through the wind-bias-proof jumper wire insulation strings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022395807.3U CN213742621U (en) | 2020-10-26 | 2020-10-26 | 500kV single-loop cat-shaped tower iron tower with cross arm for opening and closing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022395807.3U CN213742621U (en) | 2020-10-26 | 2020-10-26 | 500kV single-loop cat-shaped tower iron tower with cross arm for opening and closing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213742621U true CN213742621U (en) | 2021-07-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022395807.3U Active CN213742621U (en) | 2020-10-26 | 2020-10-26 | 500kV single-loop cat-shaped tower iron tower with cross arm for opening and closing |
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| Country | Link |
|---|---|
| CN (1) | CN213742621U (en) |
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2020
- 2020-10-26 CN CN202022395807.3U patent/CN213742621U/en active Active
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