CN112750584A - Fault indication and live-line disassembly and assembly method applied to fixed-gap lightning arrester - Google Patents
Fault indication and live-line disassembly and assembly method applied to fixed-gap lightning arrester Download PDFInfo
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- CN112750584A CN112750584A CN202011631968.6A CN202011631968A CN112750584A CN 112750584 A CN112750584 A CN 112750584A CN 202011631968 A CN202011631968 A CN 202011631968A CN 112750584 A CN112750584 A CN 112750584A
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- lightning arrester
- lightning
- arrester
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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
- H01C1/00—Details
- H01C1/01—Mounting; Supporting
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/04—Arrangements of distinguishing marks, e.g. colour coding
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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
- H01T1/00—Details of spark gaps
- H01T1/16—Series resistor structurally associated with spark gap
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Abstract
The invention relates to a fault indication and live disassembly and assembly method applied to a fixed-gap lightning arrester, which comprises a fixed-gap lightning arrester body, wherein a conductive end at the top of the lightning arrester body is sleeved and fixedly connected through a connecting cylinder, the other end of the connecting cylinder is inserted through a connecting rod and is fixed through a radially screwed hanging ring screw rod, the connecting rod is fixedly connected with an insulating support column, the top of the insulating support column is connected with a live installation wire clamp through a wire, the other end of the live installation wire clamp is tightly pressed and fixed on a high-voltage insulating wire, the lower end of the insulating support column is fixedly connected with a support plate, the lower end of the lightning arrester body is fixedly provided with a ball head electrode, and an air gap is reserved between the ball head electrode and the support plate.
Description
Technical Field
The invention relates to the technical field of power transmission and distribution equipment, in particular to a fault indication and live-line disassembly and assembly method applied to a fixed-gap lightning arrester.
Background
In the distribution lines technical field, the arrester is the important device of taking precautions against the thunder and lightning overvoltage all the time, to reducing the tripping operation of distribution lines, protection wire equipment avoids the thunder and lightning overvoltage to damage and has the important function, does not bear the overvoltage when the clearance arrester of protection circuit normally operates, has the characteristics such as dependable performance, the appearance is small and exquisite, light in weight, the installation is nimble. However, the gap arresters currently used in the market have the following problems: firstly, the clearance is easily influenced by factors such as wind vibration, thermal expansion and contraction of the lead, quality of constructors and the like, and the clearance is easily deviated to influence the lightning protection effect; secondly, the normal operation of the line cannot be influenced after the line arrester fails, so that the operator cannot know whether the arrester can be used continuously under the condition that no pole climbing inspection is carried out after the line is powered on; thirdly, the lightning arrester needs to be arranged for power failure replacement for many times after being frequently damaged, and the power supply reliability of the power system is greatly reduced.
Disclosure of Invention
In view of the defects of the prior art, the technical problem to be solved by the invention is to provide a fault indication and live-line disassembly and assembly method applied to a fixed-gap arrester, the traditional fixed-gap arrester is optimized, the installation structure of two electrodes of the arrester is improved, the arrester can be quickly installed under the live-line condition, the structure is reliable, the gap is fixed, and in addition, on the basis of the traditional hot-melting type and colored-belt type methods for the gapless arrester, a new fault indication method suitable for the fixed-gap arrester is provided, the insulation and support insulator of an overhead conductor is well protected, the lightning protection level of a distribution line is improved, and the lightning stroke fault rate is reduced; not only simple structure is reasonable, simple to operate moreover.
In order to solve the technical problems, the technical scheme of the invention is as follows: the fixed gap lightning arrester comprises a lightning arrester body, wherein a top conductive end of the lightning arrester body is arranged and fixedly connected through a connecting cylinder sleeve, the other end of the connecting cylinder is inserted into a connecting rod and fixed through a hanging ring screw rod of a radial screw in, the connecting rod is fixedly connected with an insulating strut, the top of the insulating strut is connected with an electrified installation wire clamp through a wire, the other end of the electrified installation wire clamp is tightly pressed and fixed on a high-voltage insulating wire, a supporting plate is fixedly connected with the lower end of the insulating strut, a ball head electrode is fixedly arranged at the lower end of the lightning arrester body, and an air gap is reserved between the ball head electrode and the supporting plate.
Furthermore, the connecting cylinder sleeve is in an inverted L shape, a vertical section of the connecting cylinder sleeve is fixedly connected with the lightning arrester body, and the end part of a horizontal section is inserted and conducted through a connecting rod and is screwed and fixed from the outside to the inside through a hanging ring screw rod.
Furthermore, the upper end of the insulating support is fixedly connected with the conducting wire and the metal bar through a bolt, a nut, a spring washer and a flat washer respectively, and the lower end of the insulating support is fixedly connected with the supporting plate through a bolt, a nut, a spring washer and a flat washer.
Furthermore, the backup pad level is extended, and its one end of keeping away from the arrester body is buckled and is the U type and link firmly on the cross arm, is close to the vertical bending downwards of arrester body one end.
Furthermore, a temperature-sensitive color-changing coating is coated on the ball head electrode.
Furthermore, the lightning arrester body is of a metal oxide lightning arrester structure and contains zinc oxide element materials.
A fault indication and live-line disassembly and assembly method applied to a fixed-gap arrester is carried out according to the following steps: when the lightning arrester operates, operation maintenance personnel can judge whether the lightning arrester breaks down or not according to the carbonization degree and color indication of the paint on the surface of the outer side of the ball electrode, which is in contact with air; after the lightning arrester is found to be in fault, the lightning arrester can be replaced in a live state; when the lightning arrester is replaced, the lifting bolt is loosened by using the hot-line operating rod, and then the lightning arrester body can be partially taken down; then, lifting a new lightning arrester body by using a live operating rod, sleeving a connecting cylinder at the upper end of the lightning arrester on a connecting rod, and enabling the lightning arrester to vertically downwards by means of the gravity of the lightning arrester; and finally, the top of the connecting cylinder is lifted to the bottom, and the lifting eye bolt is rotated to be screwed down to complete the installation.
Further, when the system normally operates, the air gap isolates the system voltage, and the lightning arrester body bears lower voltage; when the power line is struck by lightning, under the action of lightning overvoltage, the air gap between the support plate and the ball head electrode is broken down, the lightning arrester body presents low impedance, and the lightning flows through the lightning arrester body, the air gap, the support plate, the cross arm and the tower and is discharged to the ground; after the lightning impulse, power frequency voltage loads on the arrester, and the resistance of arrester body grow in the twinkling of an eye, and the electric current that passes through is arc current and is suppressed at lower numerical value, and air gap arc voltage drop increases, and air gap's insulation resumes rapidly, and electric arc extinguishes naturally in the very short time, and the power frequency afterflow is interrupted completely, resumes normal operating mode.
Compared with the prior art, the invention has the following beneficial effects: the device has the characteristics of good economy, convenience in installation, high reliability and the like, and the beneficial effects of concrete performances are as follows: (1) the gap distance is fixed, the installation is simple, and the bad protection effect caused by inaccurate adjustment of the gap distance in the installation time can be avoided; (2) the temperature-sensing color-changing coating is coated on the ball head electrode, so that inspection personnel can quickly find the damaged lightning arrester, and the operation and maintenance efficiency is improved; (3) power failure is not needed when the lightning arrester is replaced, so that the operation reliability of a power grid is improved; (4) the lightning arrester body can pass a whole 65kA high-current test and has excellent current-flowing performance.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Drawings
FIG. 1 is a schematic assembly diagram of an embodiment of the present invention;
FIG. 2 is a schematic configuration diagram of an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a support plate in an embodiment of the present invention.
In the figure: 1-lightning arrester body, 2-connecting cylinder, 3-connecting rod, 4-flying ring screw rod, 5-insulating support, 6-conducting wire, 7-live installation wire clamp, 8-supporting plate, 9-ball electrode, 10-air gap, 11-cross arm and 12-high-voltage insulating conducting wire.
Detailed Description
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
As shown in FIGS. 1 to 3, a method for fault indication and live disassembly and assembly of a fixed gap arrester, which comprises a fixed gap arrester integrating live disassembly and assembly and fault indication, comprising an arrester body 1, the top conductive end of the lightning arrester body is sleeved and fixedly connected through a connecting cylinder 2, the other end of the connecting cylinder is inserted through a connecting rod 3 and is fixed through a radially screwed hanging ring screw rod 4, the connecting rod is fixedly connected with an insulating support post 5, the top of the insulating support post is connected with an electrified installation wire clamp 7 through a lead 6, the other end of the live installation wire clamp is tightly pressed and fixed on the high-voltage insulated wire 12, the live installation wire clamp is provided with a puncture, the thickness is close to the insulating layer of the high-voltage insulated wire, can pierce the insulation layer and is conducted with the high-voltage insulation lead, the lower end of the insulation strut is fixedly connected with a supporting plate 8, the lower end of the lightning arrester body is fixedly provided with a ball electrode 9, and an air gap 10 with a fixed distance is reserved between the ball electrode and the supporting plate.
In the embodiment of the invention, the connecting cylinder sleeve is in an inverted L shape, the vertical section of the connecting cylinder sleeve is fixedly connected with the lightning arrester body, the end part of the horizontal section is inserted and conducted through the connecting rod and is screwed and fixed from the outside to the inside through the hanging ring screw rod, the lightning arrester body is fixed through the connecting cylinder and the connecting rod, the lightning arrester body is ensured to be vertically arranged on the side part of the insulating support, and when the lightning arrester body is damaged, live replacement can be realized. The installation mode of the connecting rod at the upper end of the insulating support and the connecting cylinder at the upper end of the lightning arrester main body is plug-in, and the connecting rod and the connecting cylinder are fastened through an eyebolt.
In the embodiment of the invention, the upper end of the insulating support is fixedly connected with the conducting wire and the metal bar through the bolt, the nut, the spring washer and the flat washer respectively, the bolt is connected with the conducting wire to the live installation wire clamp through the wire nose, and the lower end of the insulating support is fixedly connected with the supporting plate through the bolt, the nut and the spring washer and the flat washer.
In the embodiment of the invention, the supporting plate extends horizontally, one end of the supporting plate, which is far away from the lightning arrester body, is bent into a U shape and is fixedly connected to the cross arm 11, one end of the supporting plate, which is close to the lightning arrester body, is bent downwards and vertically, the distance of air gaps is fixed by the relative positions of the side supporting plate and the ball head electrode, so that lightning stroke discharge is ensured to occur between the air gaps, in addition, the supporting plate is made of stainless steel or hot galvanizing materials, the corrosion prevention problem of common metal materials can be effectively solved, the corrosion prevention and ablation resistance of the electrode are improved, and the lower end of.
In the embodiment of the invention, the temperature sensing color-changing paint is coated on the ball head electrode, and when the lightning arrester is damaged, the temperature sensing material is changed from red to black, so that the fault indication effect is achieved.
In the embodiment of the invention, the lightning arrester body is of a metal oxide lightning arrester structure, zinc oxide element materials are contained, the requirement that the whole lightning arrester can pass a 65kA heavy current test can be met, the lower end of the lightning arrester body is connected with a ball electrode through a built-in screw, the upper part of the lightning arrester body is fixedly connected with a connecting cylinder through a bolt, the upper end and the lower end of an insulating support column are fixedly clasped with a connecting rod through a bolt, a nut and a spring washer, a lead wire connected from an electrified mounting wire clamp and a support plate are connected, and the lightning arrester body is ensured to have good conductive current-carrying performance through the connecting cylinder at the upper end, the insulating support column connected through the connecting rod and a power supply system.
A fault indication and live-line disassembly and assembly method applied to a fixed-gap arrester is carried out according to the following steps: when the lightning arrester operates, the operation maintenance personnel can judge whether the lightning arrester breaks down according to the carbonization degree and the color indication of the paint on the surface of the ball electrode, which is in contact with the air. And after the lightning arrester is found to be in fault, the lightning arrester can be replaced in an electrified way. When the lightning arrester is replaced, the body part of the lightning arrester can be taken down by loosening the lifting bolt through the hot-line operating rod. And then lifting a new lightning arrester body by using a live operating rod, sleeving a connecting cylinder at the upper end of the lightning arrester on the connecting rod, and enabling the lightning arrester to vertically face downwards by means of the gravity of the lightning arrester. And then, the top of the connecting cylinder is lifted to the bottom, and the lifting eye bolt is rotated to be screwed down to complete the installation.
The working principle of the embodiment of the invention is as follows: when the system normally operates, the air gap isolates the system voltage, the lightning arrester body bears lower voltage, the aging problem under the long-term operation voltage is not considered, the reliability is greatly improved, and the maintenance cost is reduced; when the power line is struck by lightning, under the action of lightning overvoltage, the air gap between the support plate and the ball head electrode is broken down, the lightning arrester body presents low impedance, and the lightning flows through the lightning arrester body, the air gap, the support plate, the cross arm and the tower and is discharged to the ground. After the lightning impulse, power frequency voltage loads on the arrester, and the resistance of arrester body grow in the twinkling of an eye, and the electric current that passes through is arc current and is suppressed at lower numerical value, and air gap arc voltage drop increases, and air gap's insulation resumes rapidly, and electric arc extinguishes naturally in the very short time, and the power frequency afterflow is interrupted completely, resumes normal operating mode.
The present invention is not limited to the above preferred embodiments, and any one can derive various other types of fault indication and live-line attachment/detachment methods applied to the fixed-gap arresters according to the teaching of the present invention. All equivalent changes and modifications made according to the claims of the present invention should be covered by the present invention.
Claims (8)
1. A fault indication and live-line disassembly and assembly method applied to a fixed-gap arrester is characterized in that: including fixed clearance's arrester, it contains the arrester body, the electrically conductive end in arrester body top is established and is linked firmly through the connecting cylinder cover, and the connecting cylinder other end passes through the connective bar and inserts and fixed through the rings screw rod of radial screw in, the connective bar links firmly with insulating pillar, insulating pillar top is connected with electrified installation fastener through the wire, and this electrified installation fastener other end compresses tightly to be fixed on high-voltage insulation conductor, and the insulating pillar lower extreme has linked firmly the backup pad, arrester body lower extreme has set firmly bulb electrode, leaves air gap between this bulb electrode and backup pad.
2. The method of claim 1, wherein the method comprises the following steps: the connecting cylinder sleeve is in an inverted L shape, a vertical section of the connecting cylinder sleeve is fixedly connected with the lightning arrester body, and the end part of a horizontal section is inserted and conducted through a connecting rod and is screwed and fixed from outside to inside through a hanging ring screw rod.
3. The method of claim 1, wherein the method comprises the following steps: the upper end of the insulating support column is fixedly connected with the conducting wire and the metal rod through the bolt, the nut, the spring washer and the flat washer respectively, and the lower end of the insulating support column is fixedly connected with the supporting plate through the bolt, the nut and the spring washer and the flat washer.
4. The method of claim 1, wherein the method comprises the following steps: the backup pad level is extended, and its one end of keeping away from the arrester body is buckled and is the U type and link firmly on the cross arm, is close to the vertical bending downwards of arrester body one end.
5. The method of claim 1, wherein the method comprises the following steps: the ball head electrode is coated with a thermochromic paint.
6. The method of claim 1, wherein the method comprises the following steps: the lightning arrester body is of a metal oxide lightning arrester structure and internally contains zinc oxide element materials.
7. A method for indicating faults and assembling and disassembling an electrified fixed gap arrester, which is characterized in that the method for indicating faults and assembling and disassembling an electrified fixed gap arrester according to any one of claims 1 to 6 is adopted and is carried out according to the following steps: when the lightning arrester operates, operation maintenance personnel can judge whether the lightning arrester breaks down or not according to the carbonization degree and color indication of the paint on the surface of the outer side of the ball electrode, which is in contact with air; after the lightning arrester is found to be in fault, the lightning arrester can be replaced in a live state; when the lightning arrester is replaced, the lifting bolt is loosened by using the hot-line operating rod, and then the lightning arrester body can be partially taken down; then, lifting a new lightning arrester body by using a live operating rod, sleeving a connecting cylinder at the upper end of the lightning arrester on a connecting rod, and enabling the lightning arrester to vertically downwards by means of the gravity of the lightning arrester; and finally, the top of the connecting cylinder is lifted to the bottom, and the lifting eye bolt is rotated to be screwed down to complete the installation.
8. The method of claim 7, wherein the method comprises the following steps: when the system normally operates, the air gap isolates the system voltage, and the lightning arrester body bears lower voltage; when the power line is struck by lightning, under the action of lightning overvoltage, the air gap between the support plate and the ball head electrode is broken down, the lightning arrester body presents low impedance, and the lightning flows through the lightning arrester body, the air gap, the support plate, the cross arm and the tower and is discharged to the ground; after the lightning impulse, power frequency voltage loads on the arrester, and the resistance of arrester body grow in the twinkling of an eye, and the electric current that passes through is arc current and is suppressed at lower numerical value, and air gap arc voltage drop increases, and air gap's insulation resumes rapidly, and electric arc extinguishes naturally in the very short time, and the power frequency afterflow is interrupted completely, resumes normal operating mode.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011324396 | 2020-11-24 | ||
| CN2020113243967 | 2020-11-24 |
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| CN112750584A true CN112750584A (en) | 2021-05-04 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113904261A (en) * | 2021-09-26 | 2022-01-07 | 国网福建省电力有限公司 | Circuit arrester does not have power failure installation and changes device |
| CN114023516A (en) * | 2021-11-10 | 2022-02-08 | 山东迅实电气有限公司 | Live-line dismounting lightning arrester capable of replacing insulator |
| CN114974766A (en) * | 2022-05-31 | 2022-08-30 | 国网福建省电力有限公司电力科学研究院 | Gapless lightning arrester capable of sensing fault and working method thereof |
-
2020
- 2020-12-31 CN CN202011631968.6A patent/CN112750584A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113904261A (en) * | 2021-09-26 | 2022-01-07 | 国网福建省电力有限公司 | Circuit arrester does not have power failure installation and changes device |
| CN114023516A (en) * | 2021-11-10 | 2022-02-08 | 山东迅实电气有限公司 | Live-line dismounting lightning arrester capable of replacing insulator |
| CN114974766A (en) * | 2022-05-31 | 2022-08-30 | 国网福建省电力有限公司电力科学研究院 | Gapless lightning arrester capable of sensing fault and working method thereof |
| CN114974766B (en) * | 2022-05-31 | 2024-01-23 | 国网福建省电力有限公司电力科学研究院 | Gapless lightning arrester capable of sensing faults and working method thereof |
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