CN210271949U - Anti-seismic high-voltage lightning arrester - Google Patents
Anti-seismic high-voltage lightning arrester Download PDFInfo
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- CN210271949U CN210271949U CN201822134345.2U CN201822134345U CN210271949U CN 210271949 U CN210271949 U CN 210271949U CN 201822134345 U CN201822134345 U CN 201822134345U CN 210271949 U CN210271949 U CN 210271949U
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- ring body
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- lightning protection
- protection element
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Abstract
The utility model discloses an anti-seismic high-voltage arrester, which belongs to the field of arresters and comprises a high-voltage wiring terminal, an arrester element and a grounding terminal, wherein the high-voltage wiring terminal is connected with one end of the arrester element; the damping ring comprises a ring body, a plurality of damping springs are uniformly arranged on the ring body, the damping springs are symmetrical about the axis of the ring body, the two ends of each damping spring are connected with the inner wall of the ring body, the axis of each damping spring coincides with the axis of the ring body, and nitrogen is filled in the ring body. The beneficial effects of the utility model are that: the earthquake resistance is high; the partial discharge resistance is strong.
Description
Technical Field
The utility model belongs to the arrester field relates to an antidetonation high voltage arrester.
Background
With the rapid development of economy in China, the demand of electric power and electrical equipment is rapidly increased, and the lightning arrester is an electric appliance for protecting the electrical equipment from being damaged by high transient overvoltage and limiting follow current time and constantly limiting follow current amplitude.
The existing lightning arrester is not high in anti-seismic performance, in the using process, the porcelain bushing is easy to generate vibration due to transient high voltage of lightning, so that the porcelain bushing of the lightning arrester is easy to crack, damage and leak discharge, the leakage discharge can cause great influence on the safe operation and power supply reliability of an electric appliance, the leakage discharge can also cause great potential safety hazard to maintenance personnel, and great economic loss is caused to users and the society. Therefore, attention should be paid to improvement of the anti-seismic performance of the lightning arrester.
Disclosure of Invention
The utility model aims to provide a: the anti-seismic high-voltage arrester solves the problem that the existing arrester is not high in anti-seismic performance.
The utility model adopts the technical scheme as follows:
an anti-seismic high-voltage arrester comprises a high-voltage wiring terminal, a lightning protection element and a grounding terminal, wherein the high-voltage wiring terminal is connected with one end of the lightning protection element, a first damping ring is sleeved at the joint of the high-voltage wiring terminal and the lightning protection element, the other end of the lightning protection element is connected with the grounding terminal, and a second damping ring is sleeved at the joint of the lightning protection element and the grounding terminal; the first damping ring comprises a ring body, a plurality of damping springs are uniformly arranged on the ring body, the damping springs are symmetrical about the axis of the ring body, two ends of each damping spring are connected with the inner wall of the ring body, the axis of each damping spring is overlapped with the axis of the ring body, and nitrogen is filled in the ring body; the second damping ring comprises a second ring body, a plurality of second damping springs are evenly arranged inside the second ring body, two ends of each second damping spring are connected with the inner wall of the second ring body, the axis of each second damping spring is perpendicular to the horizontal plane, and nitrogen is filled inside the second ring body.
The existing lightning arrester is not high in anti-seismic performance, in the using process, the porcelain bushing is easy to generate vibration due to transient high voltage of lightning, so that the porcelain bushing of the lightning arrester is easy to crack, damage and leak discharge, the leakage discharge can cause great influence on the safe operation and power supply reliability of an electric appliance, the leakage discharge can also cause great potential safety hazard to maintenance personnel, and great economic loss is caused to users and the society. Therefore, attention should be paid to improvement of the anti-seismic performance of the lightning arrester. The utility model relates to an antidetonation high voltage arrester, the arrester with by protective apparatus parallelly connected, the arrester limits the thunder and lightning overvoltage wave, divides the thunder and lightning to flow into ground. Under the condition of normal working voltage, the lightning arrester has higher resistance to the ground, which is equal to open circuit; when the lightning overvoltage occurs, no matter the frequency is high or low, the lightning arrester can be quickly connected to the ground, so that the lightning current is quickly discharged to the ground, the resistance of the lightning arrester becomes very small and approaches to short circuit, and the pulse current is returned to a high-resistance state after being connected to the ground. The first damping ring is arranged at the joint of the high-voltage wiring terminal and the lightning protection element, the vibration at the joint mainly comes from the vibration of the lightning arrester body caused by the instantaneous high voltage of the lightning, the damping spring axially arranged in the ring body of the first damping ring is used for buffering the vibration of the lightning arrester body, and nitrogen is filled for further buffering high-frequency vibration; the second damping ring is arranged at the connecting position of the lightning protection element and the grounding terminal, the vibration mainly comes from the ground and the upper part of the lightning arrester body, a damping spring with the axis vertical to the ground is arranged in the second ring body of the second damping ring and used for buffering the vibration in the vertical direction, and nitrogen is filled for further buffering the high-frequency vibration. Two stages of damping rings are arranged, and damping springs with axes in different directions can buffer vibration in different directions; through setting up second damping spring and nitrogen gas combination, can cushion the vibrations of different frequencies, reach the antidetonation effect.
Furthermore, the lightning protection element comprises a core body, an insulating cylinder and a porcelain bushing, wherein the insulating cylinder is positioned in the porcelain bushing, the core body is positioned in the insulating cylinder, the core body comprises a pressure spring, a metal shell, valve plates and an insulating rod, one end of the pressure spring is connected with a high-voltage wiring terminal, the other end of the pressure spring is connected with one end of the insulating rod, the other end of the insulating rod is connected with a grounding terminal, the insulating rod penetrates through a central axis of the metal shell, the insulating rod is provided with the valve plates, and adjacent valve plates are connected with each other; the top of the metal shell is connected with the insulating rod, and the bottom of the metal shell is connected with the grounding terminal. The lightning arrester is connected with the protected equipment in parallel, and has higher resistance to the ground under the condition of normal working voltage, which is equal to open circuit; when lightning overvoltage occurs, current flows in from the high-voltage wiring terminal, and impact current passes through the valve plate; the metal shell connected with the grounding terminal is arranged, the potential of the metal shell is zero, the insulating rod is connected with the metal shell, the suspension potential generated by bubbles, impurities and cracks generated in the manufacturing process of the insulator is reduced to zero, and the occurrence of partial discharge is avoided.
Furthermore, a buffer pad is arranged on the insulator piece of the porcelain bushing. The shock pad is arranged on the insulator piece, so that shock generated on the lightning protection element can be buffered, the porcelain bushing is protected, and the shock-resistant effect is further achieved.
Furthermore, the valve plate is a zinc oxide valve plate. The zinc oxide has ideal volt-ampere characteristics and excellent nonlinear performance. The good nonlinear volt-ampere characteristic of zinc oxide is utilized, so that microampere or milliampere current flowing through the lightning arrester is extremely small when the lightning arrester works at normal voltage; when overvoltage acts, the resistance drops sharply, and the energy of the overvoltage is released, so that the effect of protecting the protected equipment is achieved.
Further, the inner side of the insulating cylinder is covered with a water absorption layer. Under the action of operating voltage and ambient temperature, water in the valve plate is evaporated on the outer side of the valve plate and the inner wall of the porcelain sleeve to cause surface flashover, wherein flashover refers to the phenomenon that when gas or liquid dielectric medium around the solid insulator is broken down, the gas or liquid dielectric medium discharges along the surface of the solid insulator. The water absorbing layer is arranged to avoid bringing water in the process of poor sealing or lightning arrester assembling, and partial discharge is further avoided.
Furthermore, an equalizing ring is arranged between the high-voltage wiring terminal and the lightning protection element. Corona discharge refers to a local self-sustaining discharge of a gaseous medium in a non-uniform electric field, and is one of the most common forms of gas discharge. In the vicinity of the tip electrode having a small radius of curvature, the gas is ionized and excited due to the local electric field strength exceeding the ionization field strength of the gas, and thus corona discharge occurs. The grading ring is used for changing voltage distribution among insulator pieces of the porcelain bushing, so that the voltage of the insulator pieces of the porcelain bushing close to the wire side is reduced, and the purpose of avoiding corona under corona voltage is achieved.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. the utility model relates to an antidetonation high voltage arrester, through setting up two-stage damping ring, the not equidirectional vibrations can be cushioned to the damping spring of equidirectional axis.
2. The utility model relates to an antidetonation high voltage arrester combines through setting up damping spring and nitrogen gas, can cushion the vibrations of different frequencies, reaches the antidetonation effect.
3. The utility model relates to an antidetonation high voltage arrester, through setting up the metal casing of being connected with ground terminal, its electric potential is zero, and the insulating rod is connected with the metal casing, will fall to zero because the suspension electric potential that bubble, impurity, the crack that produces in the insulator manufacturing process produced, avoids partial discharge's emergence.
4. The utility model relates to an anti-seismic high-voltage arrester, which utilizes the good nonlinear volt-ampere characteristic of zinc oxide by arranging a zinc oxide valve plate, so that microampere or milliampere current flowing through the arrester is extremely small when the normal working voltage is applied; when overvoltage acts, the resistance drops sharply, and the energy of the overvoltage is released, so that the effect of protecting the protected equipment is achieved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and that for those skilled in the art, other relevant drawings can be obtained according to the drawings without inventive effort, wherein:
fig. 1 is a schematic view of the overall structure of an anti-seismic high-voltage arrester of the present invention;
fig. 2 is a schematic structural view of a core body of the anti-seismic high-voltage arrester of the utility model;
fig. 3 is a schematic structural view of a first damping ring of the anti-seismic high-voltage arrester of the present invention;
fig. 4 is the second damping ring structure diagram of the anti-seismic high-voltage arrester of the utility model.
The labels in the figure are: the lightning protection structure comprises a 1-high-voltage wiring terminal, a 2-lightning protection element, a 201-core body, a 202-insulating cylinder, a 203-porcelain bushing, a 204-pressure spring, a 205-metal shell, a 206-valve plate, a 207-insulating rod, a 208-water absorbing layer, a 3-grounding terminal, a 4-first damping ring, a 401-ring body, a 402-damping spring, a 5-second damping ring, a 501-second ring body, a 502-second damping spring, a 6-buffer cushion and a 7-equalizing ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention will be described in further detail with reference to the following examples.
Example one
The utility model provides an antidetonation high voltage arrester, includes high voltage binding post 1, lightning-arrest component 2, ground terminal 3, its characterized in that: the high-voltage wiring terminal 1 is connected with one end of a lightning protection element 2, a first damping ring 4 is sleeved at the joint of the high-voltage wiring terminal 1 and the lightning protection element 2, the other end of the lightning protection element 2 is connected with a grounding terminal 3, and a second damping ring 5 is sleeved at the joint of the lightning protection element 2 and the grounding terminal 3; the first damping ring 4 comprises a ring body 401, a plurality of damping springs 402 are uniformly arranged in the ring body 401, the damping springs 402 are symmetrical about the axis of the ring body 401, two ends of each damping spring 402 are connected with the inner wall of the ring body 401, the axis of each damping spring 402 is overlapped with the axis of the ring body 401, and nitrogen is filled in the ring body 401; the second damping ring 5 comprises a second ring body 501, a plurality of second damping springs 502 are uniformly arranged inside the second ring body 501, two ends of each second damping spring 502 are connected with the inner wall of the second ring body 501, the axis of each second damping spring 502 is perpendicular to the horizontal plane, and nitrogen is filled inside the second ring body 501.
The first damping spring 4 and the second damping spring 5 are both compression springs made of spring steel.
The existing lightning arrester is not high in anti-seismic performance, in the using process, the porcelain bushing is easy to generate vibration due to transient high voltage of lightning, so that the porcelain bushing of the lightning arrester is easy to crack, damage and leak discharge, the leakage discharge can cause great influence on the safe operation and power supply reliability of an electric appliance, the leakage discharge can also cause great potential safety hazard to maintenance personnel, and great economic loss is caused to users and the society. Therefore, attention should be paid to improvement of the anti-seismic performance of the lightning arrester. The utility model relates to an antidetonation high voltage arrester, the arrester with by protective apparatus parallelly connected, the arrester limits the thunder and lightning overvoltage wave, divides the thunder and lightning to flow into ground. Under the condition of normal working voltage, the lightning arrester has higher resistance to the ground, which is equal to open circuit; when the lightning overvoltage occurs, no matter the frequency is high or low, the lightning arrester can be quickly connected to the ground, so that the lightning current is quickly discharged to the ground, the resistance of the lightning arrester becomes very small and approaches to short circuit, and the pulse current is returned to a high-resistance state after being connected to the ground. The first damping ring 4 is arranged at the joint of the high-voltage wiring terminal 1 and the lightning protection element, the vibration mainly comes from the vibration of the lightning arrester body caused by the instantaneous high voltage of the lightning, a damping spring 402 axially arranged along the inner part of a ring body 401 of the first damping ring 4 is used for buffering the vibration of the lightning arrester body, and nitrogen is filled for further buffering high-frequency vibration; the second damping ring 5 is arranged at the connection part of the lightning protection element 2 and the grounding terminal 3, the vibration mainly comes from the ground and the upper part of the lightning arrester body, a second damping spring 502 with the axis vertical to the ground is arranged in a second ring body 501 of the second damping ring 5 and is used for damping the vibration in the vertical direction, and nitrogen is filled for further damping the high-frequency vibration. Two stages of damping rings are arranged, and damping springs with axes in different directions can buffer vibration in different directions; through setting up damping spring and nitrogen gas combination, can cushion the vibrations of different frequencies, reach the antidetonation effect.
Example two
In this embodiment, on the basis of the first embodiment, the lightning protection element 2 includes a core 201, an insulating cylinder 202, and a porcelain bushing 203, the insulating cylinder 202 is located in the porcelain bushing 203, the core 201 is located in the insulating cylinder 202, the core 201 includes a pressure spring 204, a metal shell 205, a valve plate 206, and an insulating rod 207, one end of the pressure spring 204 is connected to the high-voltage connection terminal 1, the other end of the pressure spring 204 is connected to one end of the insulating rod 207, the other end of the insulating rod 207 is connected to the ground terminal 3, the insulating rod 207 is disposed on a central axis of the metal shell 205 in a penetrating manner, the insulating rod 207 is provided with a plurality of valve plates 206, and adjacent valve plates 206 are connected to each other; the top of the metal shell 205 is connected to the insulating rod, and the bottom of the metal shell 205 is connected to the ground terminal 3.
The valve plate 206 is a zinc oxide valve plate, and the metal shell 205 is made of brass.
The existing lightning arrester is poor in manufacturing process, bubbles, impurities, cracks and the like can be left in the insulator, and periodic partial discharge can occur in the insulator under the action of a high-voltage alternating electric field, so that the performance of the insulator is reduced, and even the voltage resistance is lost. Over time, the partial discharge can cause the whole insulating layer to be broken down and explode, which greatly influences the safe operation and the power supply reliability of the electric appliance and causes great economic loss for users and society. The utility model relates to a direct current polar line arrester limits the thunder and lightning overvoltage ripples, divides the thunder and lightning to flow into ground. The lightning arrester is connected with the protected equipment in parallel, and has higher resistance to the ground under the condition of normal working voltage, which is equal to open circuit; when lightning overvoltage occurs, current flows in from the high-voltage wiring terminal 1, and impact current passes through the valve plate 206, and due to the nonlinear characteristic of the valve plate 206, the voltage drop on the valve plate 206 is limited, so that the voltage drop is lower than the impact withstand voltage of protected equipment, the equipment is protected, and the impact current flows to the ground through the grounding terminal 3; the metal shell 205 connected to the ground terminal 3 is set to have a zero potential, and the insulating rod 207 is connected to the metal shell 205 to reduce the floating potential generated by bubbles, impurities, and cracks generated in the manufacturing process of the insulator to zero, thereby preventing the occurrence of partial discharge.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, and any modifications, equivalents and improvements made by those skilled in the art within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. An antidetonation high voltage arrester which characterized in that: the lightning protection device comprises a high-voltage wiring terminal (1), a lightning protection element (2) and a grounding terminal (3), wherein the high-voltage wiring terminal (1) is connected with one end of the lightning protection element (2), a first damping ring (4) is sleeved at the joint of the high-voltage wiring terminal (1) and the lightning protection element (2), the other end of the lightning protection element (2) is connected with the grounding terminal (3), and a second damping ring (5) is sleeved at the joint of the lightning protection element (2) and the grounding terminal (3); the first damping ring (4) comprises a ring body (401), a plurality of damping springs (402) are uniformly arranged in the ring body (401), the damping springs (402) are symmetrical about the axis of the ring body (401), two ends of each damping spring (402) are connected with the inner wall of the ring body (401), the axis of each damping spring (402) is overlapped with the axis of the ring body (401), and nitrogen is filled in the ring body (401); the second damping ring (5) comprises a ring body (501), a plurality of damping springs (502) are evenly arranged inside the ring body (501), two ends of each damping spring (502) are connected with the inner wall of the ring body (501), the axis of each damping spring (502) is perpendicular to the horizontal plane, and nitrogen is filled inside the ring body (501).
2. An anti-seismic high voltage arrester according to claim 1, characterized in that: the lightning protection element (2) comprises a core body (201), an insulating cylinder (202) and a porcelain bushing (203), wherein the insulating cylinder (202) is located in the porcelain bushing (203), the core body (201) is located in the insulating cylinder (202), the core body (201) comprises a pressure spring (204), a metal shell (205), valve plates (206) and an insulating rod (207), one end of the pressure spring (204) is connected with a high-voltage wiring terminal (1), the other end of the pressure spring (204) is connected with one end of the insulating rod (207), the other end of the insulating rod (207) is connected with a grounding terminal (3), the insulating rod (207) penetrates through a central axis of the metal shell (205), the insulating rod (207) is provided with the plurality of valve plates (206), and adjacent valve plates (206) are connected with each other; the top of the metal shell (205) is connected with the insulating rod, and the bottom of the metal shell (205) is connected with the grounding terminal (3).
3. An anti-seismic high voltage arrester according to claim 2, characterized in that: and a buffer pad (6) is arranged on the insulator piece of the porcelain bushing (203).
4. An anti-seismic high voltage arrester according to claim 2, characterized in that: the valve plate (206) is a zinc oxide valve plate.
5. An anti-seismic high voltage arrester according to claim 2, characterized in that: the inner side of the insulating cylinder (202) is covered with a water absorption layer (208).
6. An anti-seismic high voltage arrester according to claim 2, characterized in that: and a grading ring (7) is arranged between the high-voltage wiring terminal (1) and the lightning protection element (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822134345.2U CN210271949U (en) | 2018-12-18 | 2018-12-18 | Anti-seismic high-voltage lightning arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822134345.2U CN210271949U (en) | 2018-12-18 | 2018-12-18 | Anti-seismic high-voltage lightning arrester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210271949U true CN210271949U (en) | 2020-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822134345.2U Active CN210271949U (en) | 2018-12-18 | 2018-12-18 | Anti-seismic high-voltage lightning arrester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210271949U (en) |
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- 2018-12-18 CN CN201822134345.2U patent/CN210271949U/en active Active
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