CN113096898A - F wire suspension insulator type voltage limiter of electrified railway traction power supply system contact net - Google Patents
F wire suspension insulator type voltage limiter of electrified railway traction power supply system contact net Download PDFInfo
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- CN113096898A CN113096898A CN202110399724.8A CN202110399724A CN113096898A CN 113096898 A CN113096898 A CN 113096898A CN 202110399724 A CN202110399724 A CN 202110399724A CN 113096898 A CN113096898 A CN 113096898A
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- voltage
- power supply
- supply system
- traction power
- core rod
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/02—Suspension insulators; Strain insulators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/005—Insulators structurally associated with built-in electrical equipment
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/42—Means for obtaining improved distribution of voltage; Protection against arc discharges
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/12—Overvoltage protection resistors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/12—Overvoltage protection resistors
- H01C7/123—Arrangements for improving potential distribution
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T4/00—Overvoltage arresters using spark gaps
- H01T4/16—Overvoltage arresters using spark gaps having a plurality of gaps arranged in series
Abstract
The invention relates to the field of external insulation and lightning protection of an electrified railway traction power supply system, in particular to an F-line suspension insulator type voltage limiter of a contact network of the electrified railway traction power supply system. The high-voltage end of the insulating core rod is connected with the upper end, the low-voltage end is connected with the lower end, a plurality of voltage limiting elements are mounted in the middle of the insulating core rod, one of the voltage limiting elements is connected with the upper end, the outer layer of the composite jacket is molded after the upper end, the lower end, the insulating core rod and the voltage limiting elements are integrally formed, the equalizing ring is mounted on the outer layer of the adjacent end of the composite jacket after the voltage limiting elements are molded, and the series air gap is formed between the adjacent equalizing rings or between the adjacent equalizing ring and the lower end. The invention provides an F-wire suspension insulator type voltage limiter for an electrified railway traction power supply system contact net, which has the advantages of simple structure, convenience in installation, capability of suspending a wire and lightning protection function.
Description
Technical Field
The invention relates to the field of external insulation and lightning protection of an electrified railway traction power supply system, in particular to an F-line suspension insulator type voltage limiter of a contact network of the electrified railway traction power supply system.
Background
Over a decade, the development of the electrified railways in China is very rapid, a large number of old lines are electrified and reformed, and the lines of the high-speed railways are increasingly dense. A traction power supply system is an important system in an electrified railway and functions to supply power to a vehicle. The reliability of the traction power supply system plays an important role in the reliable operation of the electrified railway. The columns of the traction power supply system of the electrified railway are mostly positioned on the viaduct and are higher, and generally, the shielding of tall buildings is not arranged around the columns, so that the columns are easy to be struck by lightning. And the insulation level of the contact net insulator of the traction power supply system is not enough to resist lightning overvoltage, so that lightning accidents occur in a plurality of lines, the contact net insulator or traction substation equipment is damaged, and even travelling is influenced. Among them, lightning stroke accidents caused by F-line suspension insulator lightning stroke flashover account for a large proportion. At present, the common device for lightning stroke protection of the F-line suspension insulator is a gap arrester, a protection gap or a lightning conductor. These devices can play a certain role in lightning protection, but have the following problems:
(1) the gapped arresters need to be installed in parallel with the insulators. Firstly, in order to ensure that the arrester and the insulator are in good insulation fit, the gap distance of the arrester needs to be determined through a lightning impulse discharge voltage test, and the test process is complicated. Secondly, the gap distance needs to be adjusted during installation, and the protection effect is poor due to inaccurate adjustment of the gap distance. Thirdly, the lightning arrester is an additional device on the line, and needs to be purchased and installed with the insulator respectively, which is not good in economy.
(2) The protection gap can only prevent the insulator or the wire from being damaged by lightning stroke, but cannot prevent the lightning stroke from tripping. And need adjust clearance distance during the installation, it is easy because clearance distance adjusts inaccurate and causes the protection bad effect.
(3) The overhead ground wire has better protection effect on direct lightning, but has no obvious protection effect on induction lightning.
Disclosure of Invention
The invention aims to solve the problems that a common F wire suspension insulator test process is complicated, the installation is complex, and the lightning protection effect is not obvious, and provides the F wire suspension insulator type voltage limiter for the overhead contact system of the traction power supply system of the electrified railway, which has the advantages of simple structure, convenience in installation, safety and reliability, can play a role in suspending a lead, and has a lightning protection function.
In order to realize the purpose, the following technical scheme is provided:
the utility model provides an electrified railway pulls F line suspension insulator formula voltage limiter of power supply system contact net, includes upper end, compound overcoat, insulating plug, series connection air gap, voltage limiting element, lower end, equalizer ring, and insulating plug high pressure end connects the upper end, and the lower end is connected to the low pressure end, installs a plurality of voltage limiting element in the middle of the insulating plug, one of a plurality of voltage limiting element with the upper end head is connected, outer layer mould pressing compound overcoat after upper end, lower end, insulating plug and the voltage limiting element integrated into one piece, adjacent one end skin installation equalizer ring behind the voltage limiting element mould pressing compound overcoat, form series connection air gap between adjacent equalizer ring or between adjacent equalizer ring and the lower end.
The composite outer sleeve has an insulation function, the high-voltage end of the insulation core rod is connected with the upper end and used for connecting a circuit cross arm, the low-voltage end of the insulation core rod is connected with the lower end and used for connecting a wire circuit, the upper end, the lower end and the insulation core rod are connected together to form an insulation mechanism capable of bearing larger mechanical force, the two ends are connected with the voltage limiting elements on the corresponding sides, the tail ends of the voltage limiting elements lead electric potentials to the equalizing rings, and series air gaps are formed among the equalizing rings, so that a discharge path is formed.
Preferably, the voltage limiting element comprises a connecting electrode, a valve plate column and a discharge electrode, and epoxy resin paint is smeared on the inner side and the outer side of the valve plate column.
Preferably, the voltage limiting element is sleeved on the insulating core rod, and a connecting electrode of the voltage limiting element is connected with the upper end or the lower end through threads.
Preferably, the outer layer of the discharge electrode coated composite outer sleeve is sleeved with a grading ring, and the grading ring is connected with the discharge electrode.
Preferably, the discharge electrode is completely wrapped on the inner side of the composite outer sleeve or partially exposed on the outer side of the composite outer sleeve or completely exposed on the outer side of the composite outer sleeve by 360 degrees.
Preferably, two voltage limiting elements are adopted, and are arranged in a two-body symmetrical structure and are respectively arranged at the high-voltage end and the low-voltage end of the insulating core rod.
Preferably, two pressure limiting elements are adopted, the two pressure limiting elements are connected together through a fixing device and are installed, and the upper pressure limiting element is connected with the upper end head.
Preferably, the number of the voltage limiting elements is three, and the three voltage limiting elements are respectively arranged at the high-voltage end of the insulating core rod, the middle of the insulating core rod and the low-voltage end of the insulating core rod; the pressure limiting element at the high-pressure end is connected with the upper end head, and the pressure limiting element at the low-pressure end is connected with the lower end head.
Compared with the prior art, the invention has the following beneficial effects:
the device not only can play the effect that suspension insulator hung the wire, still has the function of lightning protection, is a collection suspension support wire and lightning protection product in an organic whole. The series air gap distance of the device is fixed, the gap distance does not need to be adjusted during installation, and the device can be installed and formed at one time, is convenient to install, small in size, light in weight, simple in structure and low in cost.
Drawings
FIG. 1 is a schematic structural view of the present invention in example 1;
FIG. 2 is an integral structure of the integrated pressure limiter before molding in embodiment 1;
FIG. 3 is a structural view of a voltage limiting element;
FIG. 4 is a schematic view of a grading ring;
FIG. 5 is a schematic view of the installation;
wherein, 1, an upper end; 2. compounding the outer sleeve; 3. an insulating core rod 3; 4. a series air gap; 5. a voltage limiting element; 6. connecting the electrodes; 7. a discharge electrode; 8. a valve plate column; 9. a lower end head; 10. and (6) a grading ring.
Detailed Description
Example 1:
as shown in fig. 1-4, a suspension insulator type voltage limiter for an F wire of a contact network of an electrified railway traction power supply system comprises an upper end 1, a lower end 9, a composite outer sleeve 2, an insulating core rod 3, a series air gap 4, voltage limiting elements 5, a lower end 9 and a grading ring 10, wherein the high-voltage end of the insulating core rod 3 is connected with the upper end 1, the low-voltage end is connected with the lower end 9, two voltage limiting elements 5 are respectively arranged in the middle of the insulating core rod 3, one voltage limiting element 5 is connected with the upper end 1 and positioned at the high-voltage side, the other voltage limiting element 5 is connected with the lower end 9 and positioned at the low-voltage side, the outer layer of the upper end 1, the lower end 9, the insulating core rod 3 and the two voltage limiting elements 5 are integrally formed to form the outer layer of the die pressing composite jacket 2, the equalizing rings 10 are respectively arranged on the outer layers of the adjacent ends of the two voltage limiting elements 5 after the die pressing composite jacket 2, and the series air gaps 4 are formed between the two equalizing rings 10.
As shown in fig. 3, the voltage limiting element 5 includes a connecting electrode 6, a valve sheet column 8 and a discharge electrode 7, and epoxy resin paint is coated on both the inner side and the outer side of the valve sheet column 8. The two voltage limiting elements 5 are arranged in a two-body symmetrical structure and are respectively arranged at the high-voltage end and the low-voltage end of the insulating core rod, the voltage limiting elements 5 are sleeved on the insulating core rod 3, and the connecting electrodes 6 of the voltage limiting elements 5 are connected with the upper end 1 or the lower end 9 through threads. The outer layer of the composite outer sleeve 2 is sleeved with a grading ring 10 after the discharge electrode 7 is coated, and the grading ring 10 is connected with the discharge electrode 7. The discharge electrode 7 is completely wrapped on the inner side of the composite outer sleeve 2 or partially exposed on the outer side of the composite outer sleeve 2 or completely exposed on the outer side of the composite outer sleeve 2 by 360 degrees.
As shown in fig. 5, the composite sheath 2 has an insulating function, the high-voltage end of the insulating core rod 3 is connected with the upper end head 1 for connecting a circuit cross arm, the low-voltage end is connected with the lower end head 9 for connecting a wire circuit, and the upper end head 1, the lower end head 9 and the insulating core rod 3 are connected together to form an insulating mechanism capable of bearing large mechanical force. When the system normally operates, the system voltage is isolated by the series air gap 4, the voltage limiting element 5 bears a very small part of the system operating voltage, under the action of the inductive lightning or direct lightning overvoltage with high enough amplitude, the voltage limiting element 5 presents low impedance, the discharge electrode 7 leads the potential to the equalizing rings 10, and the series air gaps between the equalizing rings 10 are broken down, so that the lightning energy can be released through a discharge path consisting of the upper end head 1, the lower end head 9, the voltage limiting element 5, the equalizing rings 10 and the series air gaps 4. After the lightning surge, the voltage applied to the two ends of the voltage limiting element 5 is reduced to the system operation voltage, the voltage limiting element 5 recovers to the high impedance state, the system follow current arc is naturally extinguished in a very short time, the air gap insulation is rapidly recovered, and the circuit returns to the normal operation state.
The discharge electrode 7 is connected with the equalizing ring 10 after being coated with the composite jacket 2 in various modes, and preferably connected by screws, so that the discharge electrode 7 can lead the potential to the equalizing ring 10 through the screws, the equalizing ring 10 can also be directly fixed at the end part of the voltage limiting element 5 by structural adhesive, and the discharge electrode 7 is connected with the equalizing ring 10 through a circuit formed by breaking down the composite jacket 2.
The invention not only can play a role of suspending the wire by the suspension insulator, but also has the function of lightning protection, and is a product integrating the suspension support wire and the lightning protection. The series gap 4 distance of the device is fixed, the gap distance does not need to be adjusted during installation, the device can be installed and formed at one time, and the device is convenient to install, small in size, light in weight, simple in structure and low in cost.
Example 2:
this example is the same as example 1, except that:
two voltage limiting elements are arranged in the middle of the insulating core rod and are connected together through a fixing device, the upper voltage limiting element is connected with the upper end head, the discharge electrode of the lower voltage limiting element is coated by the composite outer sleeve and then is provided with a grading ring, and a series air gap is formed between the grading ring and the lower end head.
During discharging, the series air gap between the grading ring and the lower end head is broken down, and the lightning energy is discharged through a discharging path formed by the upper end head, the voltage limiting element, the grading ring, the series air gap and the lower end head.
Example 3:
this example is the same as example 1, except that:
on the basis of the structure of the embodiment 1, a voltage limiting element is further installed in the middle of the insulating core rod, namely, between the two voltage limiting elements, two ends of the voltage limiting element are both provided with discharge electrodes, and equalizing rings are installed at two ends after the composite outer sleeve is integrally coated, so that a first series air gap is formed between the voltage limiting element at the high-voltage end and the equalizing rings at two opposite ends of the middle voltage limiting element, and similarly, a second series air gap is formed between the voltage limiting element at the low-voltage end and the equalizing rings at two opposite ends of the middle voltage limiting element.
When discharging, the two series air gaps are broken down, and the lightning energy is discharged through a discharge path formed by the upper end, the voltage limiting element at the high-voltage end, the first series air gap, the middle voltage limiting element, the second series air gap, the voltage limiting element at the low-voltage end and the lower end.
Claims (8)
1. The utility model provides an electrified railway traction power supply system contact net F line suspension insulator formula voltage limiter which characterized in that: comprises an upper end (1), a composite outer sleeve (2), an insulating core rod (3), a series air gap (4), a voltage limiting element (5), a lower end (9) and a grading ring (10), wherein the high-voltage end of the insulating core rod (3) is connected with the upper end (1), the low-voltage end is connected with the lower end (9), a plurality of voltage limiting elements (5) are arranged in the middle of the insulating core rod (3), one of the voltage limiting elements (5) is connected with the upper end (1), go up end (1), lower end (9), insulating plug (3) and voltage limiting component (5) integrated into one piece back outer mould pressing composite cover (2), voltage limiting component (5) mould pressing composite cover (2) back adjacent one end skin installation equalizer ring (10), form series connection air gap (4) between adjacent equalizer ring (10) or between adjacent equalizer ring (10) and lower end (9).
2. The electrified railway traction power supply system contact net F wire suspension insulator type voltage limiter of claim 1, characterized in that: the voltage limiting element (5) comprises a connecting electrode (6), a valve plate column (8) and a discharge electrode (7), and epoxy resin paint is smeared on the inner side and the outer side of the valve plate column (8).
3. The electrified railway traction power supply system contact net F wire suspension insulator type voltage limiter of claim 2, characterized in that: the voltage limiting element (5) is sleeved on the insulating core rod (3), and a connecting electrode (6) of the voltage limiting element (5) is connected with the upper end (1) or the lower end (9) through threads.
4. The electrified railway traction power supply system contact net F wire suspension insulator type voltage limiter of claim 2, characterized in that: the discharge electrode (7) is coated on the composite outer sleeve (2), the outer layer is sleeved with the grading ring (10), and the grading ring (10) is connected with the discharge electrode (7).
5. The electrified railway traction power supply system contact net F wire suspension insulator type voltage limiter of claim 2, characterized in that: the discharge electrode (7) is completely wrapped on the inner side of the composite outer sleeve (2) or partially exposed on the outer side of the composite outer sleeve (2) or completely exposed on the outer side of the composite outer sleeve (2) by 360 degrees.
6. The electrified railway traction power supply system contact net F wire suspension insulator type voltage limiter of claim 1, characterized in that: the two voltage limiting elements (5) are arranged in a two-body symmetrical structure and are respectively arranged at the high-voltage end and the low-voltage end of the insulating core rod (3).
7. The electrified railway traction power supply system contact net F wire suspension insulator type voltage limiter of claim 1, characterized in that: the two pressure limiting elements (5) are connected together through a fixing device and are mounted, and the upper pressure limiting element (5) is connected with the upper end head (1).
8. The electrified railway traction power supply system contact net F wire suspension insulator type voltage limiter of claim 1, characterized in that: the three voltage limiting elements (5) are respectively arranged at the high-voltage end of the insulating core rod, the middle of the insulating core rod and the low-voltage end of the insulating core rod; the pressure limiting element (5) at the high-pressure end is connected with the upper end (1), and the pressure limiting element (5) at the low-pressure end is connected with the lower end (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110399724.8A CN113096898A (en) | 2021-04-14 | 2021-04-14 | F wire suspension insulator type voltage limiter of electrified railway traction power supply system contact net |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110399724.8A CN113096898A (en) | 2021-04-14 | 2021-04-14 | F wire suspension insulator type voltage limiter of electrified railway traction power supply system contact net |
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| Publication Number | Publication Date |
|---|---|
| CN113096898A true CN113096898A (en) | 2021-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110399724.8A Pending CN113096898A (en) | 2021-04-14 | 2021-04-14 | F wire suspension insulator type voltage limiter of electrified railway traction power supply system contact net |
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| CN (1) | CN113096898A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110102960A1 (en) * | 2008-03-27 | 2011-05-05 | Otkrytoe Aktsionernoe Obschestvo "NPO STREAMER" | High-voltage insulator and a high-voltage electric power line using said insulator |
| CN104022443A (en) * | 2014-06-16 | 2014-09-03 | 山东迅实电气有限公司 | Cantilever supporting voltage limiter for traction power supply electric railway |
| CN104022444A (en) * | 2014-06-16 | 2014-09-03 | 山东迅实电气有限公司 | Rod-shaped suspended voltage limiter for overhead line |
-
2021
- 2021-04-14 CN CN202110399724.8A patent/CN113096898A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110102960A1 (en) * | 2008-03-27 | 2011-05-05 | Otkrytoe Aktsionernoe Obschestvo "NPO STREAMER" | High-voltage insulator and a high-voltage electric power line using said insulator |
| CN104022443A (en) * | 2014-06-16 | 2014-09-03 | 山东迅实电气有限公司 | Cantilever supporting voltage limiter for traction power supply electric railway |
| CN104022444A (en) * | 2014-06-16 | 2014-09-03 | 山东迅实电气有限公司 | Rod-shaped suspended voltage limiter for overhead line |
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Application publication date: 20210709 |
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| RJ01 | Rejection of invention patent application after publication |