CN216671309U - Device for preventing graphite bomb from being damaged - Google Patents
Device for preventing graphite bomb from being damaged Download PDFInfo
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- CN216671309U CN216671309U CN202121851616.1U CN202121851616U CN216671309U CN 216671309 U CN216671309 U CN 216671309U CN 202121851616 U CN202121851616 U CN 202121851616U CN 216671309 U CN216671309 U CN 216671309U
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Abstract
The utility model discloses a device for preventing graphite bomb from being damaged, which belongs to the technical field of lightning protection and arc extinction and comprises an insulator string body, wherein the interior of the insulator string body is of a hollow structure, an insulating tube is sleeved in the hollow structure, a protective sleeve is arranged on the outer side of the insulating tube, a skirt edge is arranged on the protective sleeve, fixing seats are arranged at two ends of the insulator string body and are arranged in a sealing mode, insulating liquid is arranged in the insulating tube, an electrode is arranged on each fixing seat, and the electrode penetrates through the fixing seats and extends into the insulating tube. The utility model has the advantages that the arc is cut off rapidly, the discharge of the arc in liquid generates the liquid-electric effect, the impact pressure wave is formed rapidly, the impact arc is cut off immediately when being formed, the carbon emission is reduced, the liquid medium replaces the original conductive metal, the liquid medium is safer and cleaner, the carbon emission is effectively reduced, the insulating property is recovered, and the strong air flow is sprayed during arc extinction, so that the graphite fiber is peeled off the outer surface of the insulator string, the insulating property of the insulator string is protected, and the damage of the graphite bomb is effectively prevented.
Description
Technical Field
The utility model relates to the technical field of lightning protection and arc extinction, in particular to a device for preventing graphite bomb from being damaged.
Background
Electricity is an indispensable resource in daily life of people, along with the development of science and technology and the improvement of technology, electric energy is closely related to the life of people, and power failure can cause the normal operation of power electronic equipment, thereby seriously affecting the life of people.
The electric energy is mainly transmitted by a power transmission line, and the power transmission line is a mainly damaged object in a war or a chaos period. The damage means is mainly that graphite bombs are thrown in the region of the power transmission line, and graphite fibers generated after the bombs explode are attached to the umbrella skirt of the insulator string, so that the insulation performance of the insulator string is greatly reduced; when lightning strikes occur, the power transmission line is prone to line faults. And the throwing of the graphite bomb is concealed and has a wide range, so that maintenance personnel of the power transmission line can hardly find problems in time, and the cost for replacing the insulator string is very high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a device for preventing graphite bomb from being damaged, which solves the technical problems mentioned in the background technology. The insulator string not only has strong arc extinguishing capability, but also can automatically strip off the graphite fibers attached to the surface of the insulator string and blow off the graphite fibers to ensure that the insulation performance of the insulator string ensures that the power transmission line can reliably, stably and safely transmit power.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:
the utility model provides a prevent device that graphite bomb destroyed, includes insulator chain body, and insulator chain body is inside to be set up to hollow structure, and the hollow structure endotheca is equipped with the insulating tube, and the outside of insulating tube is provided with protective case, is provided with the shirt rim on the protective case, and insulator chain body both ends are provided with the fixing base to sealed setting is provided with insulating liquid in the insulating tube, is provided with the electrode on the fixing base, and the electrode passes the fixing base, and stretches into in the insulating tube.
Furthermore, a seat disc is arranged on the fixed seat, a plurality of back-flushing pipes are arranged on the seat disc, one ends of the back-flushing pipes are connected with the electrodes, and the back-flushing pipes are arranged in a diverging structure by taking the electrodes as centers.
Furthermore, the backflushing pipe comprises a lightning receiving electrode, a backflushing pipe body and a nozzle lightning receiving electrode, the lightning receiving electrode is arranged at one end of the backflushing pipe body, a backflushing hole is formed in the backflushing pipe body, the nozzle lightning receiving electrode is arranged at the other end of the backflushing hole, and the lightning receiving electrode and the nozzle lightning receiving electrode are graphite electrodes.
Furthermore, the electrodes comprise an upper layer graphite electrode, a middle metal electrode and a lower layer graphite electrode, the middle metal electrode is fixed on the fixing seat, the upper layer graphite electrode is arranged on the upper layer of the middle metal electrode, and the lower layer graphite electrode is arranged at the bottom of the middle metal electrode and is arranged in the insulating tube.
Further, the length of the electrode extending into the insulating tube is less than one fifth of the length of the insulating tube.
Further, the specific working process of the device is,
step 1: before lightning is formed, a large lightning field is formed between thundercloud and the ground, and induced charges generate coulomb force in the sealed insulating tube;
step 2: when the tower pole or the power transmission line is struck by lightning and arc discharge is caused in the insulating tube filled with insulating liquid, the liquid-electric effect generates shock waves towards the side edges;
and 3, step 3: the Pascal effect enhances the liquid electric effect, when electric arcs act on the insulating liquid, when a certain part of the static insulating liquid generates pressure intensity change, the electric arcs constantly transmit the pressure intensity to all directions of the inner side of the insulating liquid;
and 4, step 4: and the shock waves of the liquid-electricity effect and the Pascal effect impact to the side edge and then return to impact, so that the arc channel is intensively subjected to impact arc extinction.
Further, the specific working process of the step 1 is that charges with polarity opposite to that of thundercloud are induced in the insulating tube due to electrostatic induction and accumulated in the sealed insulating tube, the charges cannot move freely because the liquid is incompressible fluid, an arc chain is finally formed in the insulating tube, mutually repulsive coulomb force is generated between the charges with the same polarity, and the coulomb force acts on the tube wall to form reaction force due to the sealing of the insulating tube, so that the induced charge chain is cut off.
Further, the specific working process of step 1 is that arc discharge is initiated in the ceramic tube filled with insulating oil, part of the insulating oil in the discharge channel is instantly vaporized, decomposed and ionized into high-temperature plasma and suddenly expanded to form a mechanical pressure wave which rapidly propagates outwards, but since the liquid can be regarded as a shock wave transmission medium which is not compressed, a mechanical effect of power is shown to the outside when liquid-phase discharge is performed in the discharge channel, an acting force which impacts the wall of the ceramic tube is formed in the ceramic tube, and the wall of the ceramic tube generates a shock wave in the insulating oil medium due to the interaction of the forces.
Further, the specific working process of step 3 is that when the impact arc acts on the metal electrode to apply pressure to the insulating oil in the ceramic tube, according to the pascal principle, a certain part of the static fluid in the closed container generates pressure variation and constantly transmits the pressure variation to all directions, and then the insulating oil medium around is impacted by a larger acting force from the discharge channel in the ceramic tube, and the acting force rebounds after contacting the wall of the ceramic tube.
Further, the specific working process in the step 4 is that the pressure and the temperature in the ceramic tube are increased by the liquid-electric effect and the pascal effect, so that an acting force pointing to the center from the ceramic tube wall is generated, under the acting force, and under the blowing of the insulating oil to the electric arc, the temperature of the electric arc is reduced, so that the electric arc is extinguished more quickly, the longer the electric arc formed in the ceramic tube is, the greater the acting force is on the ceramic tube wall, and conversely, the greater the impact force for cutting off the electric arc is, so that the action force rebounds after acting on the outer shell, and the acting force pointing to the center of the insulating tube is formed, and the medium generates a polarization current in an impact pre-breakdown stage, so that the breakdown voltage is reduced, the breakdown voltage value corresponding to a short time period is reduced, and the corresponding breakdown volt-second characteristic of the medium is gentle.
Controlling the arc in a fixed arc extinguishing path: the insulator string for preventing the graphite bomb from being damaged preferentially attracts, controls and changes the development track of the lightning impulse arc through the triggering of the lightning pulse, the arc is controlled in a fixed arc extinguishing path, meanwhile, high-speed airflow is generated in an arc extinguishing pipe to be sprayed out, graphite fibers are peeled off the surface of an insulator, the insulating property of equipment is protected, and the power supply reliability is ensured.
The induced charge generates coulomb force in the sealed insulating tube: before the thunder and lightning forms, a large thunder and lightning field is formed between the thundercloud and the ground. Due to electrostatic induction, charges with polarity opposite to that of thundercloud are induced in the insulating tube and accumulated in the sealed insulating tube; because the liquid is non-compressible fluid, the charges can not move freely, and finally an arc chain is formed in the insulating tube; mutually repulsive coulomb force is generated among the charges with the same polarity, and the coulomb force acts on the pipe wall to form reaction force due to the sealing of the insulating pipe, so that the induced charge chain is cut off.
Lightning arrester causes pascal effect: when the lightning rod is struck by lightning, the lightning arc is poured into an insulating tube in the lightning rod, and the insulating tube is filled with liquid media (insulating oil, water-oil mixture and the like); the pascal effect indicates: at incompressible restAfter any point in the fluid is subjected to pressure increment generated by external force, the pressure increment is instantaneously transmitted to each point of the static fluid. Since the pressure in the liquid does not vary, i.e. P1＝P2Then, then
The force of the electric arc acting on the upper surface of the insulating tube is transferred to the insulating tube wall with larger area, so that the pressure in the insulating tube is further increased, and each point on the inner wall of the insulating tube impacts the electric arc with larger acting force at the same time, thereby achieving the purpose of cutting off the electric arc.
The liquid-electric effect after pre-breakdown further enhances the Pascal effect: after pre-breakdown occurs, electric arc discharges in the insulating tube containing liquid, and part of liquid in the discharge channel is instantly vaporized, decomposed and ionized into high-temperature plasma and suddenly expands to form a mechanical pressure wave which rapidly spreads outwards. However, since the liquid can be regarded as a shock wave transmission medium which cannot be compressed, when the discharge channel discharges in a liquid phase, an ultrahigh-power mechanical effect is presented to the outside, an impact acting force is formed in the insulating tube and acts on the discharge channel in an impulse or impact pressure mode to impact the electric arc and cut off the electric arc.
Due to the adoption of the technical scheme, the utility model has the following beneficial effects:
the utility model has the advantages that the arc is cut off rapidly, the discharge of the arc in liquid generates the liquid-electric effect, the impact pressure wave is formed rapidly, the impact arc is cut off immediately when being formed, the carbon emission is reduced, the liquid medium replaces the original conductive metal, the liquid medium is safer and cleaner, the carbon emission can be effectively reduced, the insulating property is recovered, and the strong air flow is sprayed during arc extinction, so that the graphite fiber can be peeled off from the outer surface of the insulator string, the insulating property of the insulator string is protected, and the damage of the graphite bomb is effectively prevented.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention;
FIG. 2 is a top view of the apparatus of the present invention.
In the attached drawing, 1-an insulating tube, 2-a protective sleeve, 3-insulating liquid, 4-a recoil nozzle, 5-an electrode, 6-a fixed seat, 7-a seat disc and 8-a recoil tube.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings by way of examples of preferred embodiments. It should be noted, however, that the numerous details set forth in the description are merely for the purpose of providing the reader with a thorough understanding of one or more aspects of the present invention, which may be practiced without these specific details.
As shown in fig. 1-2, a device for preventing graphite bomb from being damaged comprises an insulator string body, wherein the insulator string body is internally provided with a hollow structure, an insulating tube 1 is sleeved in the hollow structure, a protective sleeve 2 is arranged on the outer side of the insulating tube 1, a skirt edge is arranged on the protective sleeve 2, fixing seats 6 are arranged at two ends of the insulator string body and are arranged in a sealing manner, insulating liquid 3 is arranged in the insulating tube 1, electrodes 5 are arranged on the fixing seats 6, and the electrodes 5 penetrate through the fixing seats 6 and stretch into the insulating tube 1.
The insulating tube is made of high-hardness, high-temperature-resistant and high-pressure-resistant inorganic non-metallic materials and is cylindrical; a closed space inside the insulating tube is filled with liquid (insulating oil and the like); the upper end and the lower end of the cylindrical insulating tube are sealed by adopting bases; the spraying pipeline is composed of a plurality of arc extinguishing pipes which are connected in series in sequence. The metal electrode passes through the injection pipe into the insulating pipe.
After lightning striking a metal electrode of the power transmission line or the insulator string, the electric arc enters the jet pipeline and the insulating pipe through the metal electrode; when the electric arc enters the injection pipeline, high-speed airflow is generated in the arc extinguishing pipe to be sprayed out, so that the graphite fiber is stripped off the surface of the insulator, and the insulating property of the equipment is protected. When the electric arc is poured into the insulating tube in the lightning rod, a liquid-electric effect can be generated, a strong shock wave is formed, and the shock wave acts on a discharge channel in an impulse or shock pressure mode to cut off the electric arc. The umbrella skirt prevents electric arcs from leaking into the ground through the surface of the insulating tube, and an electric arc channel is limited in the liquid arc extinguishing unit; when the electric arc enters the insulating tube, a certain pressure is applied to the liquid in the insulating tube, and according to the Pascal principle, the pressure change of a certain part of the static fluid in the closed container is constantly transmitted to all directions, so that a larger acting force is inevitably generated on the inner wall of the insulating tube. The action force rebounds after acting on the shell to form an action force with the direction pointing to the center of the insulating tube, so that the aims of cutting off the electric arc and reducing the current amplitude are fulfilled.
In this embodiment, the fixed seat 6 is provided with a seat disk 7, the seat disk 7 is provided with a plurality of back-flushing pipes 8, one end of each back-flushing pipe 8 is connected with the electrode 5, and the plurality of back-flushing pipes 8 are arranged in a divergent structure taking the electrode 5 as a center.
In this embodiment, the recoil pipe 8 includes that the lightning electrode, recoil body and spout lightning electrode, and the lightning electrode setting is in the one end of recoil body, and the recoil body is inside to be set up to the recoil hole, and the other end of recoil hole is provided with the spout lightning electrode, lightning electrode and spout lightning electrode are graphite electrode. The electrode 5 comprises an upper layer graphite electrode, a middle metal electrode and a lower layer graphite electrode, the middle metal electrode is fixed on the fixing seat 6, the upper layer graphite electrode is arranged on the upper layer of the middle metal electrode, and the lower layer graphite electrode is arranged at the bottom of the middle metal electrode and is arranged in the insulating tube 1. The length of the electrode 5 extending into the insulating tube 1 is less than one fifth of the length of the insulating tube 1.
The specific working process of the device is that,
step 1: before lightning is formed, a large lightning field is formed between the thundercloud and the ground, and the induced charges generate coulomb force in the sealed insulating tube 1. Due to electrostatic induction, charges with polarity opposite to that of thundercloud are induced in the insulating tube and accumulated in the sealed insulating tube, and because the liquid is incompressible fluid, the charges cannot move freely and finally form an arc chain in the insulating tube, mutually repulsive coulomb force is generated among the charges with the same polarity, and due to the sealing of the insulating tube, the coulomb force acts on the tube wall to form reaction force to cut off the induced charge chain.
Step 2: when the tower pole or the power transmission line is struck by lightning and arc discharge is generated in the insulating tube 1 filled with the insulating liquid 3, the liquid-electricity effect generates shock waves which impact to the side edges. Arc discharge is initiated in the ceramic tube filled with insulating oil, part of the insulating oil in the discharge channel is instantly vaporized, decomposed and ionized into high-temperature plasma and suddenly expands to form a mechanical pressure wave which rapidly propagates outwards, but the liquid can be regarded as a shock wave transmission medium which can not be compressed, so that when the discharge channel is subjected to liquid-phase discharge, the mechanical effect of power is shown to the outside, an acting force which impacts the wall of the ceramic tube is formed in the ceramic tube, and the wall of the ceramic tube generates shock waves in the insulating oil medium due to the interaction of the forces.
And step 3: the pascal effect enhances the liquid-electric effect, and when the electric arc acts on the insulating liquid 3 and the pressure of a certain part of the static insulating liquid 3 changes, the electric arc is constantly transmitted to all directions inside the insulating liquid 3. When an impact electric arc acts on the metal electrode to apply pressure to the insulating oil in the ceramic tube, according to the Pascal principle, a certain part of static fluid in the closed container generates pressure change, the pressure is constantly transmitted to all directions, and then the insulating oil medium around is impacted by a larger acting force from a discharge channel in the ceramic tube, and the acting force rebounds after contacting the wall of the ceramic tube.
And 4, step 4: and the shock waves of the liquid-electricity effect and the Pascal effect impact to the side edge and then return to impact, so that the arc channel is intensively subjected to impact arc extinction. The hydro-electric effect and the Pascal effect enable the pressure in the ceramic tube to be increased and the temperature to be increased, acting force pointing to the center from the ceramic tube wall is generated, under the acting force, the temperature of the electric arc is reduced under the condition that insulating oil blows the electric arc, the electric arc is rapidly extinguished, the longer the electric arc formed in the ceramic tube is, the larger the acting force is on the ceramic tube wall, the larger the impact force for cutting off the electric arc in reverse is, the rebound occurs after the acting force acts on the shell, the acting force pointing to the center of the insulating tube is formed, the polarization current is generated by the medium in the impact pre-breakdown stage, the breakdown voltage is reduced, the breakdown voltage value corresponding to a short time period is reduced, and the breakdown volt-second characteristic corresponding to the medium is enabled to be smooth.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (5)
1. The utility model provides a prevent device that graphite bomb destroyed, includes insulator chain body, its characterized in that: the insulator string is characterized in that a hollow structure is arranged inside the insulator string body, an insulating tube (1) is sleeved in the hollow structure, a protective sleeve (2) is arranged on the outer side of the insulating tube (1), a skirt edge is arranged on the protective sleeve (2), fixing seats (6) are arranged at two ends of the insulator string body and are arranged in a sealing mode, insulating liquid (3) is arranged in the insulating tube (1), electrodes (5) are arranged on the fixing seats (6), and the electrodes (5) penetrate through the fixing seats (6) and stretch into the insulating tube (1).
2. A graphite bomb destruction resistant unit as claimed in claim 1, in which: a seat disc (7) is arranged on the fixed seat (6), a plurality of back-flushing pipes (8) are arranged on the seat disc (7), one end of each back-flushing pipe (8) is connected with the electrode (5), and the plurality of back-flushing pipes (8) are arranged in a diverging structure by taking the electrode (5) as the center.
3. A graphite bomb destruction resistant unit as claimed in claim 2, in which: the backflushing pipe (8) comprises a lightning receiving electrode, a backflushing pipe body and a nozzle lightning receiving electrode, the lightning receiving electrode is arranged at one end of the backflushing pipe body, a backflushing hole is formed in the backflushing pipe body, the nozzle lightning receiving electrode is arranged at the other end of the backflushing hole, and the lightning receiving electrode and the nozzle lightning receiving electrode are graphite electrodes.
4. A graphite bomb destruction resistant unit as claimed in claim 1, in which: the electrode (5) comprises an upper layer graphite electrode, a middle metal electrode and a lower layer graphite electrode, the middle metal electrode is fixed on the fixing seat (6), the upper layer graphite electrode is arranged on the upper layer of the middle metal electrode, and the lower layer graphite electrode is arranged at the bottom of the middle metal electrode and is arranged in the insulating tube (1).
5. The device of claim 4, wherein the device is adapted to prevent damage from a graphite bomb: the length of the electrode (5) extending into the insulating tube (1) is less than one fifth of the length of the insulating tube (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121851616.1U CN216671309U (en) | 2021-08-09 | 2021-08-09 | Device for preventing graphite bomb from being damaged |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121851616.1U CN216671309U (en) | 2021-08-09 | 2021-08-09 | Device for preventing graphite bomb from being damaged |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216671309U true CN216671309U (en) | 2022-06-03 |
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ID=81759204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121851616.1U Active CN216671309U (en) | 2021-08-09 | 2021-08-09 | Device for preventing graphite bomb from being damaged |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216671309U (en) |
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2021
- 2021-08-09 CN CN202121851616.1U patent/CN216671309U/en active Active
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