CN112885580A - Distribution network live working's voltage transformer termination - Google Patents
Distribution network live working's voltage transformer termination Download PDFInfo
- Publication number
- CN112885580A CN112885580A CN202110011140.9A CN202110011140A CN112885580A CN 112885580 A CN112885580 A CN 112885580A CN 202110011140 A CN202110011140 A CN 202110011140A CN 112885580 A CN112885580 A CN 112885580A
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- cross arm
- voltage transformer
- disconnecting link
- arc
- mounting
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Suspension Of Electric Lines Or Cables (AREA)
Abstract
The invention provides a voltage transformer wiring device for distribution network live working, which comprises an installation cross arm and a supporting structure, wherein the installation cross arm is fixedly connected with a telegraph pole through a cross arm fixing structure, one end of the installation cross arm is provided with a connecting rod, a voltage transformer installation position is arranged above the other end of the installation cross arm, two disconnecting link installation positions are arranged below the other end of the installation cross arm, and the voltage transformer installation position is positioned between the two disconnecting link installation positions; the shortest distance between the installation position of the voltage transformer at the installation position of the disconnecting link and the telegraph pole is more than or equal to 20cm, and the shortest distance between the two installation positions of the disconnecting link is more than or equal to 30 cm. The invention can ensure safe operation and improve the working efficiency.
Description
Technical Field
The invention relates to a voltage transformer wiring device for distribution network live working, and belongs to the technical field of electric power installation site construction.
Background
Distribution network uninterrupted operation is used as an important means for supporting distribution network engineering construction and transformation, and in order to ensure the power supply reliability of a company and reduce power failure, the large-batch pole top switch installation work needs to be implemented in an uninterrupted operation mode.
When live working changes, installation post switch, generally need install a set of circuit segmentation switch additional in step for carry out the divide-shut operation to voltage transformer, avoid live working directly to insert voltage transformer into high-tension line and produce the explosion, cause serious harm to the operation personnel.
One way to solve this problem is to use a drop switch fuse to control the current to be coupled to the voltage transformer together, as shown in fig. 1. The disadvantage of this method is that the drop switch fuse is installed obliquely and has a large volume, which results in a large occupied space and is not easy to install,
another way to solve this problem is to mount the knife switch on the cross arm above the pole, as shown in fig. 2. The disadvantage of this method is that the knife switch is connected to the main line, so that a large current can pass through, and the installation is inconvenient and dangerous.
Therefore, it is highly desirable to provide a voltage transformer access scheme that is convenient and safe to install.
Disclosure of Invention
In view of this, the embodiment of the present invention provides a voltage transformer wiring device for distribution network live working, which can facilitate installation of a disconnecting link when a pole-mounted switch is installed, and does not have potential hidden trouble.
The technical scheme adopted by the invention is as follows:
the embodiment of the invention provides a voltage transformer wiring device for distribution network live working, which comprises: the voltage transformer support frame comprises a mounting cross arm and a support structure, the mounting cross arm is fixedly connected with a telegraph pole through a cross arm fixing structure, one end of the mounting cross arm is provided with a connecting rod, a voltage transformer mounting position is arranged above the other end of the mounting cross arm, two disconnecting link mounting positions are arranged below the other end of the mounting cross arm, and the voltage transformer mounting position is positioned between the two disconnecting link mounting positions; the supporting structure is arranged below the mounting cross arm and comprises a fastener and a supporting rod, the fastener is fixedly connected with the telegraph pole, one end of the supporting rod is connected with the fastener, and the other end of the supporting rod hooks the connecting rod; two voltage transformer connecting plates are arranged at the voltage transformer mounting position, two disconnecting link connecting plates are arranged at the disconnecting link mounting position, the voltage transformer is connected with the voltage transformer connecting plates through bolts, and the disconnecting link is connected with the disconnecting link connecting plates through bolts; the shortest distance between the installation position of the voltage transformer at the installation position of the disconnecting link and the telegraph pole is more than or equal to 20cm, and the shortest distance between the two installation positions of the disconnecting link is more than or equal to 30 cm.
Optionally, the mounting cross arm comprises a first cross arm and a second cross arm with the same length; each voltage transformer connecting plate is welded above the first cross arm and the second cross arm respectively; and each knife switch connecting plate is welded below the first cross arm and the second cross arm respectively.
Optionally, the length of both ends of the mounting cross arm is the same.
Optionally, the mounting cross arm includes a first cross arm and a second cross arm which are different in length, wherein the length of the first cross arm is greater than that of the second cross arm;
the voltage transformer connecting plate is welded on the first cross arm and comprises a horizontal connecting plate and a vertical connecting plate which are vertically connected; the knife switch connecting plate is welded on the vertical connecting plate.
Optionally, the lengths of the two ends of the first cross arm are different, and the length of one end provided with the voltage transformer connecting plate and the disconnecting link connecting plate is greater than that of the other end; one end of the second cross arm extends out of the telegraph pole by a distance smaller than the distance between the disconnecting link connecting plate closest to the telegraph pole and the telegraph pole, and the other end of the second cross arm is flush with the other end of the first cross arm.
Optionally, the other end of the mounting cross arm is 20cm from the utility pole.
Optionally, the cross arm fixing structure includes a first arc-shaped part and a second arc-shaped part respectively welded on the first cross arm and the second cross arm, and a bolt assembly; the first arc-shaped part and the second arc-shaped part are respectively provided with arc-shaped surfaces which are in fit contact with the telegraph pole, and the bolt assembly is used for penetrating through and fixedly connecting the first cross arm and the second cross arm.
Optionally, the arc length of the arc-shaped surface is equal to two fifths of the utility pole.
Optionally, the fixing piece comprises two arc-shaped hoops which are symmetrically arranged, and two ends of each arc-shaped hoop are connected through a first bolt assembly and a second bolt assembly respectively; one end of the supporting rod is connected with the first fixing piece through the first bolt assembly.
Optionally, the included angle between the support rod and the telegraph pole is 30-60 degrees.
According to the voltage transformer wiring device for distribution network live working provided by the embodiment of the invention, the voltage transformer and the disconnecting link are arranged under one cross arm, and the disconnecting link does not need to be additionally arranged on a main line, so that potential hidden trouble points of equipment operation can be avoided. In addition, the equipment of non-live working can be installed in advance, and the installation work load of the disconnecting link and the corresponding lead wire can be reduced in live working, so that the working efficiency can be improved.
Drawings
Fig. 1 and 2 are schematic diagrams of a conventional voltage transformer wiring device for live working of a distribution network;
fig. 3 is a front view of a voltage transformer wiring device for distribution network live working according to an embodiment of the present invention;
fig. 4 is a bottom view of the voltage transformer wiring device for distribution network live working according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of an arc member according to an embodiment of the present invention;
fig. 6 is a front view of a voltage transformer wiring device for distribution network live working according to another embodiment of the present invention;
fig. 7 is a bottom view of a voltage transformer wiring device for distribution network live working according to another embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
Fig. 3 is a front view of a voltage transformer wiring device for distribution network live working according to an embodiment of the present invention; fig. 4 is a bottom view of the voltage transformer wiring device for distribution network live working according to an embodiment of the present invention; FIG. 5 is a schematic structural view of an arc member according to an embodiment of the present invention; fig. 6 is a front view of a voltage transformer wiring device for distribution network live working according to another embodiment of the present invention; fig. 7 is a bottom view of a voltage transformer wiring device for distribution network live working according to another embodiment of the present invention.
As shown in fig. 3 and 4, the voltage transformer wiring device for distribution network live working according to the embodiment of the present invention includes a voltage transformer support frame 1, where the voltage transformer support frame 1 includes an installation cross arm and a support structure, the installation cross arm is fixedly connected to a telegraph pole 7 through a cross arm fixing structure, one end of the installation cross arm is provided with a connecting rod 11, a voltage transformer installation position is arranged above the other end, two disconnecting link installation positions are arranged below the other end, and the voltage transformer installation position is located between the two disconnecting link installation positions; the supporting structure is arranged below the mounting cross arm and comprises a fastener 3 and a supporting rod 2, the fastener 3 is fixedly connected with the telegraph pole 7, one end of the supporting rod 2 is connected with the fastener 3, and the other end of the supporting rod is hooked with the connecting rod 11; two voltage transformer connecting plates are arranged at the installation position of the voltage transformer, two disconnecting link connecting plates 15 are arranged at the installation position of the disconnecting link, the voltage transformer 5 is connected with the voltage transformer connecting plates through bolts, and the disconnecting link 4 is connected with the disconnecting link connecting plates 15 through bolts; the shortest distance between the knife switch installation positions and the telegraph pole is more than or equal to 20cm, the shortest distance between the two knife switch installation positions is more than or equal to 30cm, namely L1 is more than or equal to 20cm in fig. 4, and L2 is more than or equal to 30 cm.
In the embodiment of the invention, the voltage transformers 5 are connected with the column switch 8 through wires, one voltage transformer corresponds to two disconnecting links, and the two disconnecting links are respectively connected with two phases of the voltage transformer through the wires to respectively control the opening and closing operations of the voltage transformer. The two sides of the pole-mounted switch 8 are connected with the voltage line in three phases, and the pole-mounted switch 8 is also connected with the lightning arrester 6 through an electric wire.
Hereinafter, with reference to the drawings, the voltage transformer wiring device according to the embodiment of the present invention will be further described.
In the embodiment of the present invention, the mounting cross arm is composed of two cross arms, i.e., a first cross arm 10 and a second cross arm 12.
(example 1)
In this embodiment, the first cross arm 10 and the second cross arm 12 are the same length. Each voltage transformer connecting plate can be respectively welded above the first cross arm 10 and the second cross arm 12, namely welded on the cross arms along the horizontal direction perpendicular to the cross arms; each knife gate connecting plate 15 is welded below the first cross arm 10 and the second cross arm 12, i.e. on the cross arms in a horizontal direction perpendicular to the cross arms. The voltage transformer connection plate may be a steel plate having a fixing hole, and the disconnecting link connection plate may be a porous steel plate, for example, a 5-hole steel plate.
In this embodiment, one voltage transformer may be mounted at the voltage transformer mounting position and two switches may be mounted at the switch mounting position.
Further, in this embodiment, the first cross arm 10 and the second cross arm 12 have the same length at both ends, i.e., the same distance from the utility pole.
Further, in the embodiment of the present invention, as shown in fig. 4 and 5, the cross arm fixing structure may include two arc pieces 13 welded to the first cross arm 10 and the second cross arm 12, respectively, and a bolt assembly 14; the two arc-shaped pieces 13 are respectively provided with arc-shaped surfaces which are in contact with the utility pole, the bolt assembly 14 is used for penetrating and fixedly connecting the first cross arm 10 and the second cross arm 12, namely, a screw of the bolt assembly 14 can penetrate through a fixing hole on the first cross arm 10 and the second cross arm 12 and then is fixedly connected through a nut, so that the first cross arm and the second cross arm are fixed on the utility pole 7. Preferably, the arc length of the arc-shaped surface may be equal to two fifths of the pole 7. The shortest distance and the longest distance between the arc-shaped part and the cross arm can be set according to actual needs. Thus, through the arc-shaped piece and the bolt assembly, the fastening connection of the installation cross arm and the telegraph pole can be realized.
Further, in the embodiment of the present invention, the fixing member 3 may include two arc-shaped hoops symmetrically arranged, and two ends of the two arc-shaped hoops are connected through the first bolt assembly and the second bolt assembly respectively; one end of the support rod 2 is connected with the first fixing piece through the first bolt assembly. Two of each arc staple bolt are provided with the fixed orifices respectively. One end of the support rod 2 is provided with a fixing hole, and the other end of the support rod 2 is formed with a hook. The screw rod of the first bolt assembly penetrates through the fixing holes in one ends of the two arc-shaped hoops and the supporting rod respectively, then the two ends of the screw rod are fixedly connected with the arc-shaped hoops through nuts respectively, the screw rod of the second bolt assembly penetrates through the fixing holes in the other ends of the two arc-shaped hoops respectively, and then the two ends of the screw rod are fixedly connected with the arc-shaped hoops through nuts respectively, so that the annular hoops are fixed on the telegraph pole. The hook of the support rod 2 can hook the middle position of the connecting rod 11.
Further, in the embodiment of the present invention, the installation position of the supporting rod 2 may be determined according to a mechanical analysis, that is, the tension of the supporting rod 2 on the connecting rod 11 can ensure that the weight of the voltage transformer and the disconnecting link installed on the other end of the voltage transformer supporting frame is balanced. In one example, the angle between the support bar 2 and the utility pole 7 may be 30 ° to 60 °.
(example 2)
In this embodiment, as shown in fig. 6 and 7, the mounting cross arms include a first cross arm 10 and a second cross arm 12 having different lengths, wherein the length of the first cross arm 10 is greater than the length of the second cross arm 12.
In this embodiment, two voltage transformer connection boards are welded on the first cross arm 10, that is, welded on the first cross arm 10 along a horizontal direction perpendicular to the cross arm, and include a horizontal connection board 16 and a vertical connection board 17 which are vertically connected; the knife gate connecting plate 15 is welded to the vertical connecting plate 17. The mounting direction of the knife gate connecting plate 15 may be set according to actual needs, and for example, the right end portion may be welded to the end portion of the vertical connecting plate 17, or the left end portion may be welded to the end portion of the vertical connecting plate 17. The voltage transformer connection plate may be a steel plate having a fixing hole (provided on the horizontal connection plate), and the disconnecting link connection plate may be a porous steel plate, for example, a 5-hole steel plate. The installation quantity of the voltage transformers can be determined according to actual needs.
In this embodiment, the lengths of the two ends of the first cross arm 10 are different, and the length of one end provided with the voltage transformer connecting plate and the disconnecting link connecting plate is greater than that of the other end; one end of the second cross arm 12 extends out of the utility pole by a distance less than the distance between the nearest disconnecting link plate to the utility pole and the utility pole, i.e., one end of the second cross arm 12 is located between the nearest disconnecting link plate to the utility pole and the utility pole, in one example, the distance between the nearest disconnecting link plate to the utility pole and the utility pole of the second cross arm 12 can be equal to one third of the distance between the nearest disconnecting link plate to the utility pole and the utility pole. The other end of the second cross arm 12 is flush with the other end of the first cross arm.
In one example, the other end of the mounting cross arm may be 20cm from the utility pole. In this way, an effective support of the mounting cross arm by the support structure can be ensured.
The cross arm fixing structure and the supporting structure in this embodiment are the same as those in the previous embodiments, and detailed descriptions thereof will be omitted. Compared with the foregoing embodiment, since the voltage transformer and the disconnecting link are mounted on only one cross arm, the distance between the two cross arms is not affected, and two voltage transformers and corresponding 4 disconnecting links can be mounted according to actual needs. Specifically, when two voltage transformers need to be installed, the two voltage transformers can be installed on the left side and the right side of the first cross arm respectively, that is, two ends of each voltage transformer are connected with the two voltage transformer connecting plates respectively, and two disconnecting links can be installed on each disconnecting link connecting plate respectively.
Further, in the embodiment of the invention, the installation of the first cross arm and the second cross arm conforms to the engineering regulation of cross arm installation.
In summary, according to the voltage transformer wiring device for distribution network live working provided by the embodiment of the invention, since the voltage transformer and the disconnecting link are installed under one cross arm, the disconnecting link does not need to be additionally installed on the main line, and therefore, potential hidden trouble points of equipment operation can be avoided. In addition, the equipment of non-live working can be installed in advance, and the installation work load of the disconnecting link and the corresponding lead wire can be reduced in live working, so that the working efficiency can be improved.
The above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a join in marriage net live working's voltage transformer termination which characterized in that includes: the voltage transformer support frame comprises a mounting cross arm and a support structure, the mounting cross arm is fixedly connected with a telegraph pole through a cross arm fixing structure, one end of the mounting cross arm is provided with a connecting rod, a voltage transformer mounting position is arranged above the other end of the mounting cross arm, two disconnecting link mounting positions are arranged below the other end of the mounting cross arm, and the voltage transformer mounting position is positioned between the two disconnecting link mounting positions; the supporting structure is arranged below the mounting cross arm and comprises a fastener and a supporting rod, the fastener is fixedly connected with the telegraph pole, one end of the supporting rod is connected with the fastener, and the other end of the supporting rod hooks the connecting rod; two voltage transformer connecting plates are arranged at the voltage transformer mounting position, two disconnecting link connecting plates are arranged at the disconnecting link mounting position, the voltage transformer is connected with the voltage transformer connecting plates through bolts, and the disconnecting link is connected with the disconnecting link connecting plates through bolts; the shortest distance between the installation position of the voltage transformer at the installation position of the disconnecting link and the telegraph pole is more than or equal to 20cm, and the shortest distance between the two installation positions of the disconnecting link is more than or equal to 30 cm.
2. The voltage transformer wiring device for distribution network live working according to claim 1, wherein the mounting cross arm comprises a first cross arm and a second cross arm which are the same in length;
each voltage transformer connecting plate is welded above the first cross arm and the second cross arm respectively; and each knife switch connecting plate is welded below the first cross arm and the second cross arm respectively.
3. The voltage transformer wiring device for distribution network live working according to claim 2, wherein the lengths of the two ends of the mounting cross arm are the same.
4. The voltage transformer wiring device for distribution network live working according to claim 1, wherein the mounting cross arm comprises a first cross arm and a second cross arm which are different in length, wherein the length of the first cross arm is greater than that of the second cross arm;
the voltage transformer connecting plate is welded on the first cross arm and comprises a horizontal connecting plate and a vertical connecting plate which are vertically connected; the knife switch connecting plate is welded on the vertical connecting plate.
5. The voltage transformer wiring device for distribution network live working according to claim 4, wherein the lengths of the two ends of the first cross arm are different, and the length of one end provided with the voltage transformer connecting plate and the disconnecting link connecting plate is larger than that of the other end; one end of the second cross arm extends out of the telegraph pole by a distance smaller than the distance between the disconnecting link connecting plate closest to the telegraph pole and the telegraph pole, and the other end of the second cross arm is flush with the other end of the first cross arm.
6. The distribution network live working voltage transformer wiring device according to claim 5, wherein the other end of the mounting cross arm is at a distance of 20cm from the utility pole.
7. The voltage transformer wiring device for distribution network live working according to claim 2 or 4,
the cross arm fixing structure comprises a first arc-shaped part, a second arc-shaped part and a bolt assembly, wherein the first arc-shaped part and the second arc-shaped part are respectively welded on the first cross arm and the second cross arm; the first arc-shaped part and the second arc-shaped part are respectively provided with arc-shaped surfaces which are in fit contact with the telegraph pole, and the bolt assembly is used for penetrating through and fixedly connecting the first cross arm and the second cross arm.
8. The distribution network hot-line work voltage transformer wiring device of claim 7, wherein the arc length of the arc-shaped surface is equal to two-fifths of the utility pole.
9. The voltage transformer wiring device for distribution network live working according to any one of claims 1 to 8, wherein the fixing member comprises two arc-shaped hoops which are symmetrically arranged, and two ends of the two arc-shaped hoops are respectively connected through a first bolt component and a second bolt component; one end of the supporting rod is connected with the first fixing piece through the first bolt assembly.
10. The voltage transformer junction device for distribution network live working according to any one of claims 1 to 8, wherein an included angle between the support rod and the telegraph pole is 30-60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110011140.9A CN112885580B (en) | 2021-01-06 | 2021-01-06 | Distribution network live working's voltage transformer termination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110011140.9A CN112885580B (en) | 2021-01-06 | 2021-01-06 | Distribution network live working's voltage transformer termination |
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| Publication Number | Publication Date |
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| CN112885580A true CN112885580A (en) | 2021-06-01 |
| CN112885580B CN112885580B (en) | 2022-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110011140.9A Active CN112885580B (en) | 2021-01-06 | 2021-01-06 | Distribution network live working's voltage transformer termination |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202488040U (en) * | 2012-03-23 | 2012-10-10 | 河南电力工业学校 | Live working temporary fixator for 10kV isolation switch |
| CN203821940U (en) * | 2014-03-15 | 2014-09-10 | 国网山东省电力公司潍坊供电公司 | Intelligent equipment installation rack capable of being quickly assembled |
| CN204258230U (en) * | 2014-12-20 | 2015-04-08 | 浙江巨力电气有限公司 | With the overhead transmission line of reclosing breaker |
| CN105350818A (en) * | 2015-10-28 | 2016-02-24 | 国家电网公司 | Single pole seat support |
| CN105429083A (en) * | 2015-12-31 | 2016-03-23 | 国网浙江奉化市供电公司 | Double-eccentric cross arm |
| CN105870785A (en) * | 2015-01-21 | 2016-08-17 | 江苏扬开电力设备股份有限公司 | Integrated boundary circuit breaker and voltage transformer installing structure |
| CN206992487U (en) * | 2017-07-01 | 2018-02-09 | 江苏蓝虹电力设备有限公司 | A kind of modular breaker erection scaffolding |
-
2021
- 2021-01-06 CN CN202110011140.9A patent/CN112885580B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202488040U (en) * | 2012-03-23 | 2012-10-10 | 河南电力工业学校 | Live working temporary fixator for 10kV isolation switch |
| CN203821940U (en) * | 2014-03-15 | 2014-09-10 | 国网山东省电力公司潍坊供电公司 | Intelligent equipment installation rack capable of being quickly assembled |
| CN204258230U (en) * | 2014-12-20 | 2015-04-08 | 浙江巨力电气有限公司 | With the overhead transmission line of reclosing breaker |
| CN105870785A (en) * | 2015-01-21 | 2016-08-17 | 江苏扬开电力设备股份有限公司 | Integrated boundary circuit breaker and voltage transformer installing structure |
| CN105350818A (en) * | 2015-10-28 | 2016-02-24 | 国家电网公司 | Single pole seat support |
| CN105429083A (en) * | 2015-12-31 | 2016-03-23 | 国网浙江奉化市供电公司 | Double-eccentric cross arm |
| CN206992487U (en) * | 2017-07-01 | 2018-02-09 | 江苏蓝虹电力设备有限公司 | A kind of modular breaker erection scaffolding |
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| Publication number | Publication date |
|---|---|
| CN112885580B (en) | 2022-04-29 |
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