CN111834892B - Sealing method based on lightning protection and arc extinguishing airflow channel interface - Google Patents
Sealing method based on lightning protection and arc extinguishing airflow channel interface Download PDFInfo
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- CN111834892B CN111834892B CN201910299958.8A CN201910299958A CN111834892B CN 111834892 B CN111834892 B CN 111834892B CN 201910299958 A CN201910299958 A CN 201910299958A CN 111834892 B CN111834892 B CN 111834892B
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- sealing
- arc extinguishing
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- air flow
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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
- H01T1/02—Means for extinguishing arc
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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
- H01T4/02—Details
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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
- H01T4/10—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel
- H01T4/12—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel hermetically sealed
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Gasket Seals (AREA)
Abstract
The invention discloses a sealing method based on a lightning protection arc extinguishing airflow channel interface, wherein the lightning protection arc extinguishing airflow channel interface comprises a sealing interface connecting component which is mutually communicated with a turntable and an arc extinguishing cylinder, the arc extinguishing cylinder and the turntable are sealed under the supporting pressure of the sealing interface connecting component, and the sealing method comprises the following steps: the gas generating assembly is arranged in the turntable, so that the gas generating assembly can generate strong airflow acting force under the triggering condition; the method comprises the steps of enabling strong air flow to act on a sealing interface connecting assembly, and enabling most of the strong air flow to enter an arc extinguishing cylinder through the sealing interface connecting assembly under the radial constraint condition of the sealing interface connecting assembly on the strong air flow; and judging whether the acting force of the strong air flow is larger than the supporting pressure of the sealing interface connecting assembly according to the radial constraint condition of the sealing interface connecting assembly on the strong air flow. The sealing method can enable most of strong air flow to enter arc extinction from the sealing interface connecting assembly, and can ensure that the generated strong air flow acts on an electric arc to the maximum extent.
Description
Technical Field
The invention belongs to the technical field of lightning protection and arc extinction, and particularly relates to a sealing method based on a lightning protection and arc extinction airflow channel interface.
Background
Lightning protection of a power transmission line is always an important content of lightning protection work of an electric power department, lightning faults are still one of important factors affecting the safety of a power grid, the lightning factors are the main reasons of power transmission line fault tripping, when the power transmission line is struck by lightning, insulator flashover on the power transmission line is caused, power frequency follow current is caused, insulator strings and hardware fittings are damaged, and the insulator strings are burnt out and lead wire is blown out, so that the electric power department generally adopts a power transmission line adding line lightning protection device to realize protection. The application number of the Chinese patent is: 201610747255.3, patent name: the utility model provides a lightning induced type solid-phase arc extinguishing lightning protection device, when the arc extinguishing gas ball is in the trigger position, trigger electrode is blocked by the locating stick, when the arc extinguishing gas ball is triggered, the arc extinguishing gas ball produces strong air current, make trigger electrode to recess department crooked, trigger electrode's tip indentation arc extinguishing carousel, the arc extinguishing carousel rotates under the effect of plane spiral spring, until the next gas subassembly gets into the trigger position, trigger electrode that matches is blocked by the locating stick, this solid-phase arc extinguishing lightning protection device of guide type is arc extinguishing capability is strong, job stabilization is reliable, it is swift convenient to change the arc extinguishing gas ball, but jet air current can produce the leakage in arc extinguishing carousel and arc extinguishing section of thick bamboo junction, consider that the effect of not concentrated air current is insufficient to the electric arc, thereby result in the arc extinguishing capability and the lightning protection effect of arc extinguishing device, for this reason, can hope jet air current maximize to act on the electric arc and can promote the intensity of arc extinguishing air current through improving the leakproofness of lightning extinguishing air current passageway interface, for this reason, therefore, a sealing method based on lightning extinguishing air current passageway interface has been proposed.
Disclosure of Invention
The invention aims to provide a sealing method based on a lightning protection and arc extinction airflow channel interface, which can enable most of strong airflows to enter arc extinction from a sealing interface connection assembly under the radial constraint condition of the strong airflows, well prevent the strong airflows from leaking, and ensure that the generated strong airflows act on an electric arc to the maximum. In order to achieve the above purpose, the present invention adopts the following technical effects:
according to one aspect of the present invention, there is provided a sealing method based on a lightning protection arc extinguishing gas flow channel interface including a sealing interface connection assembly communicating with a turntable and an arc extinguishing cylinder, the arc extinguishing cylinder and the turntable being sealed under a supporting pressure of the sealing interface connection assembly, the sealing method comprising the steps of:
step 1: the gas generating assembly is arranged in the turntable, so that the gas generating assembly can generate strong airflow acting force under the triggering condition; the setting of the gas generating assembly in the turntable comprises the following steps:
step 10, sealing the turntable, and arranging a plurality of grooves which are uniformly distributed on the surface of the turntable and along the circumferential direction, so that the depth of the grooves is more than or equal to twice the width;
step 11, forming air injection holes for injecting air flow at the bottom of each groove; the lower end of the sealing interface connecting component is connected with the top end of the arc extinguishing cylinder through upward axial supporting pressure, the upper end of the sealing interface connecting component is extruded with at least one air injection hole at the bottom of the groove through the axial supporting pressure, and the upper end of the sealing interface connecting component is caused to be in sealing contact communication with the air injection hole at the bottom of the groove;
step 12, sequentially sleeving an L-shaped annular sleeve, a metal pipe fitting and a supporting frame body outside the gas generating assembly (2), and sequentially wrapping the gas generating assembly from inside to outside;
step 2: the method comprises the steps of enabling strong air flow to act on a sealing interface connecting assembly, and enabling most of the strong air flow to enter an arc extinguishing cylinder through the sealing interface connecting assembly under the radial constraint condition of the sealing interface connecting assembly on the strong air flow;
step 3: judging whether the acting force of the strong air flow is larger than the supporting pressure of the sealing interface connecting assembly according to the radial constraint condition of the sealing interface connecting assembly on the strong air flow, if the acting force of the strong air flow is smaller than the supporting pressure of the sealing interface connecting assembly, enabling the supporting pressure of the sealing interface connecting assembly to restore to the original position, and if the acting force of the strong air flow is larger than the supporting pressure of the sealing interface connecting assembly, repeating the step 2 until the supporting pressure of the sealing interface connecting assembly restores to the original position.
The above solution further preferably provides that, in step 2, applying a strong air flow to the sealed interfacing assembly comprises the steps of:
step 20: the top of the arc extinguishing cylinder is provided with a supporting section, a rigid neck is fixedly connected to the supporting section, and the outer wall of the top end of the neck is provided with an annular clamping part which protrudes outwards vertically;
step 21: an elastic sleeve is sleeved on the outer wall of the neck between the annular clamping part and the supporting section, and the diameter of the neck is the same as the inner diameter of the arc extinguishing cylinder;
step 22: a rigid supporting shell is arranged above the elastic sleeve, the lower opening part of the supporting shell is fixedly connected with the top of the elastic sleeve, and the annular clamping part is sleeved in the supporting shell;
step 23: at least one skirt edge is arranged below the air injection holes, the diameter of the inlet of the skirt edge is larger than that of the air injection holes so as to prevent air flow from leaking out, and the outlet of the skirt edge is nested in the upper opening part of the support shell.
Step 24: and a U-shaped sealing ring is arranged between the upper opening part and the lower opening part of the support shell and is used for blocking a gap at the joint of the support shell and the skirt edge and a gap at the joint of the support shell and the annular clamping part, so that most of strong air flow enters the arc extinguishing cylinder from the sealing interface connection assembly under the radial constraint condition of strong air flow.
In the above aspect, preferably, the gas generating component is capable of generating a strong airflow force under a triggering condition, when the gas generating component is triggered to generate a high-temperature strong airflow, the high-temperature strong airflow force ejected from the gas ejecting hole is generated, and the gas generating component is triggered to generate the high-temperature strong airflow in the sealed groove.
The sealing method further comprises the step of sealing the turntable and the sealing interface connection assembly in the same cavity, and enabling the top end of the arc extinguishing cylinder to be in butt joint sealing communication with the air spraying holes at the bottom of the groove through the supporting frame body.
The sealing interface connection assembly comprises an elastic sleeve for providing axial supporting pressure and a supporting shell for providing a high-temperature airflow channel, wherein the elastic sleeve is sleeved at the top end of the arc extinguishing cylinder, the upper end and the lower end of the supporting shell are respectively provided with an upper opening part and a lower opening part, the air spraying holes at the bottom of the groove are communicated with the upper opening part of the supporting shell in a sealing contact manner, the lower opening part of the supporting shell is connected with the top end of the elastic sleeve, and the top end of the arc extinguishing cylinder is connected with the supporting shell through the supporting of the elastic sleeve, so that the upper opening part of the supporting shell is separated from or communicated with the air spraying holes at the bottom of the groove in a sealing contact manner under the action of the elastic sleeve.
The above scheme is further preferable that the U-shaped sealing ring is arranged in the supporting shell, a skirt edge is sleeved at the upper opening part of the supporting shell, the skirt edge is nested in a gap between the upper end of the U-shaped sealing ring and the upper opening part of the supporting shell, the upper end opening part of the skirt edge is communicated with the air spraying hole, and the top end of the arc extinguishing cylinder stretches into the lower opening part of the supporting shell and is in close contact with the U-shaped sealing ring, so that the top end of the arc extinguishing cylinder is communicated with the lower opening part of the supporting shell.
In the above scheme, it is further preferable that the top end of the arc extinguishing cylinder has a supporting section, a neck and an annular clamping part, the neck is on the supporting section and contracts towards the center of the arc extinguishing cylinder, the elastic sleeve is sleeved on the neck, the upper end of the elastic sleeve is connected with the outer wall of the lower end of the supporting shell, the lower end of the elastic sleeve is connected with the supporting section, so that the supporting shell is supported and connected with the elastic sleeve, and the upper end of the neck extends into the lower opening of the supporting shell and is in close contact with the U-shaped sealing ring; the annular clamping part is arranged on the outer wall of the top end of the neck and protrudes outwards perpendicularly along the outer wall of the top end of the neck, and extends into the lower opening part of the support shell and is in close contact with the U-shaped sealing ring.
In the above aspect, preferably, the annular clamping portion is clamped in a gap between the U-shaped sealing ring and the bottom of the support housing after extending into the lower opening of the support housing.
The above scheme is further preferable, after the annular clamping part stretches into the lower opening part of the supporting shell, the annular clamping part is clamped on the inner wall of the bottom end of the U-shaped sealing ring.
It is further preferable that the diameter of the groove is not more than 20mm, and the depth of the groove is 40-50mm.
In summary, the invention adopts the technical scheme, and has the following technical effects:
(1) The sealing method can enable most of the strong air flow to enter arc extinction from the sealing interface connection assembly under the radial constraint condition of the strong air flow, has a simple structure, well prevents the strong air flow from leaking, and can ensure that the generated strong air flow acts on the arc to the maximum extent.
(2) The invention skillfully integrates the switching mechanism and the sealing structure, has simple structure and uncomplicated connection relationship, and greatly enhances the lightning protection and arc extinction reliability. When the gas production assembly produces strong air current in the carousel for the sealed interface connection subassembly at arc extinguishing cylinder top can reciprocate (vibrate) under the elasticity effect and carry out sealing contact, and guarantee can not take place left and right sides skew, improved lightning protection arc extinguishing reliability, this sealing assembly structure has also improved the security of arc extinguishing lightning protection simultaneously.
Drawings
FIG. 1 is a flow chart of a sealing method based on a lightning protection and arc extinguishing airflow channel interface of the invention
FIG. 2 is a schematic structural diagram of an interface seal assembly based on a lightning protection and arc extinguishing airflow channel of the present invention;
fig. 3 is a schematic view of the connection structure between the turntable, the seal interface connection assembly and the arc chute of the present invention;
FIG. 4 is a schematic view of the structure of the U-shaped seal ring of the present invention;
fig. 5 is a schematic structural view of the connection between the support housing and the arc chute of the present invention;
in the drawing, a sealing interface connection assembly 1, a gas generating assembly 2, a supporting frame body 3, an L-shaped annular sleeve 4, a gas injection hole 5, a skirt edge 6, a U-shaped sealing ring 7, an elastic sleeve 8, an arc extinguishing cylinder 9, a supporting shell 10, a rotary disk 11, a groove 12, a metal pipe fitting 13, a trigger electrode 14, an upper opening part 10a, a lower opening part 10b, a U-shaped groove 70, a supporting section 90, a neck part 91, an annular clamping part 92, a sealing shell 100 and a rotary shaft 101
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below by referring to the accompanying drawings and by illustrating preferred embodiments. It should be noted, however, that many of the details set forth in the description are merely provided to provide a thorough understanding of one or more aspects of the invention, and that these aspects of the invention may be practiced without these specific details.
As shown in fig. 1, 2 and 3, according to an aspect of the present invention, there is provided a sealing method based on a lightning protection arc extinguishing gas flow channel interface including a sealing interface connection assembly 1 communicating with a turntable 11 and an arc extinguishing cylinder 9, the arc extinguishing cylinder 9 and the turntable 11 being sealed by a supporting pressure of the sealing interface connection assembly 1, the sealing method comprising the steps of:
step 1: the gas generating assembly 2 is arranged in the turntable 11, so that the gas generating assembly 2 can generate the acting force of strong gas flow under the triggering condition, when the gas generating assembly 2 can generate the strong gas flow under the triggering condition to generate high-temperature gas flow for triggering the gas generating assembly 2, the acting force of the high-temperature strong gas flow sprayed out from the gas spraying holes 5 is generated, and the gas generating assembly 2 is triggered to generate the high-temperature gas flow in the sealed groove 12; the arrangement of the gas generating assembly 2 in the turntable comprises the following steps:
step 10: sealing the turntable, and arranging a plurality of grooves 12 which are uniformly distributed on the surface of the turntable 11 along the circumferential direction, wherein the depth of the grooves 12 is more than or equal to twice the width; the diameter of the groove 12 is not more than 20mm, and the depth of the groove 12 is 40-50mm;
step 11: the bottom of each groove 12 is provided with an air jet hole 5 for jetting air flow; the lower end of the sealing interface connecting component 1 is connected with the top end of the arc extinguishing cylinder 9 through upward axial supporting pressure, the upper end of the sealing interface connecting component 1 is extruded with at least one air jet hole 5 at the bottom of the groove 12 through the axial supporting pressure, and the upper end of the sealing interface connecting component 1 is caused to be communicated with the air jet hole 5 at the bottom of the groove 12 in a sealing contact manner;
step 12: the gas production assembly 2 is sequentially sleeved with an L-shaped annular sleeve 4, a metal pipe fitting 13 and a supporting frame body 3, and the gas production assembly 2 is sequentially wrapped from inside to outside; the wrapping action of the components restrains the strong airflow, so that the generated strong airflow is more concentrated, the airflow is prevented from leaking out around, and the strong airflow is used as a high-temperature airflow channel communicated with the sealing interface connecting component 1 below the groove 12;
step 2: the strong air flow acts on the sealing interface connecting assembly 1, and most air flow enters the arc extinguishing cylinder 9 through the sealing interface connecting assembly 1 under the radial constraint condition of the sealing interface connecting assembly 1 on the strong air flow; applying a strong air flow to the sealed interfacing assembly 1 comprises the steps of:
step 20: a supporting section 90 is arranged at the top of the arc extinguishing cylinder 9, a rigid neck 91 is fixedly connected to the supporting section 90, and an annular clamping part 92 which protrudes outwards vertically is arranged on the outer wall of the top end of the neck 91;
step 21: an elastic sleeve 8 is sleeved on the outer wall of the neck 91 between the annular clamping part 92 and the supporting section 90, and the diameter of the neck 91 is the same as the inner diameter of the arc extinguishing cylinder 9;
step 22: a rigid supporting shell 10 is arranged above the elastic sleeve 8, the lower opening part of the supporting shell 10 is fixedly connected with the top of the elastic sleeve 8, and then the annular clamping part 92 is sleeved in the supporting shell 10;
step 23: at least one skirt 6 is arranged below the air injection holes 5, and the diameter of the inlet of the skirt 6 is larger than that of the air injection holes 5 so as to prevent air flow from leaking out, and the outlet of the skirt 6 is nested in the upper opening part of the support shell 10.
Step 24: a U-shaped sealing ring 7 is arranged between the upper opening part and the lower opening part of the support shell 10, and the U-shaped sealing ring 7 is used for blocking a gap at the joint of the support shell 10 and the skirt 6 and a gap at the joint of the support shell 10 and the annular clamping part 92, so that most of strong air flow enters the arc extinguishing cylinder 9 from the sealing interface connecting assembly 1 under the radial constraint condition of strong air flow;
step 3: according to the radial constraint condition of the strong air flow by the sealing interface connecting assembly 1, when the high-temperature strong air flow passes through the sealing interface connecting assembly 1, the high-temperature strong air flow enables the U-shaped sealing ring 7 to be tightly clung to the inner wall of the rigid support shell 10 after being expanded, and the rigid support shell 10 is extruded after the U-shaped sealing ring 7 is expanded, so that the rigid support body 10 has a wrapping effect on the strong air flow at the interface, the support body 10 generates radial constraint on the strong air flow, at the moment, whether the acting force of the strong air flow is larger than the supporting pressure of the sealing interface connecting assembly 1 is judged, if the acting force of the strong air flow is smaller than the supporting pressure of the sealing interface connecting assembly 1, the supporting pressure of the sealing interface connecting assembly 1 is restored to the original position, and if the acting force of the strong air flow is larger than the supporting pressure of the sealing interface connecting assembly 1, the step 2 is repeated until the supporting pressure of the sealing interface connecting assembly 1 is restored to the original position.
In the present invention, as shown in fig. 2 and 3, since a gas generating assembly 2 is nested and sealed in each groove 12 on the turntable 11, a through hole communicating with the gas injection hole 5 is reserved on the outer wall of the gas generating assembly 2; when the gas generating assembly 2 is triggered to generate high-temperature air flow, the gas generating assembly 2 sprays high-temperature strong air flow into the sealing interface connecting assembly 1, and under the action force of the high-temperature strong air flow, the sprayed high-temperature air flow generates enough air flow pressure, and the strong air flow action force is applied to the sealing interface connecting assembly 1 through the gas generating assembly 2; when the acting force of the strong air flow is greater than the axial supporting pressure, the upper end (the upper end of the supporting shell 10) of the sealing interface connecting component 1 is separated from the air injection hole 5 at the bottom of the groove 12, after the air flow pressure disappears, the air flow pressure is smaller than the axial supporting pressure, and under the action of the axial supporting pressure, the upper end of the sealing interface connecting component 1 is communicated with the next groove 12 on the turntable 11 in a sealing way; under the action of axial supporting pressure, the upper end of the sealing interface connecting assembly 1 is in sealing communication with the next groove 12 on the turntable 11; and sealing the interface of the lightning protection arc extinguishing airflow channel.
In the invention, as shown in fig. 2 and 3, in the specific implementation, the sealing interface connection assembly 1, the gas generating assembly 2 and the turntable 11 are arranged in the sealing shell 100 in a sealing manner, a plurality of evenly distributed grooves 12, preferably 18 to 24 grooves, are arranged on the surface of the turntable 11 along the circumferential direction, the bottom center of each groove 12 is provided with a gas spraying hole 5, the gas generating assembly 2 is sealed and wrapped in the groove 12, the upper end of the sealing interface connection assembly 1 and the gas spraying holes 5 are tightly butted and communicated with each other, the top end of the arc extinguishing cylinder 9 penetrates into the bottom of the sealing shell 100 upwards, and the lower end of the sealing interface connection assembly 1 is sleeved on the top end of the arc extinguishing cylinder 9 for elastic connection, so that the upper end of the sealing interface connection assembly 1 and the gas spraying holes 5 are tightly butted and communicated through elastic contact; the gas generating assembly 2 is arranged on the periphery of the gas generating assembly 2, the gas generating assembly 2 is fixed in the groove 12 through the sealing support of the supporting frame 3, a through hole with the same size as the air hole 5 is formed in the bottom of the supporting frame 3, an L-shaped annular sleeve 4 is arranged on the inner wall of the bottom end of the gas generating assembly 2, the gas generating assembly 2 is supported and arranged on the inner wall of the bottom end of the supporting frame 3 through the L-shaped annular sleeve 4, a metal pipe fitting 13 is vertically arranged between the inner side wall of the supporting frame 3 and the L-shaped annular sleeve 4, the lower end of the metal pipe fitting 13 is arranged on the bottom of the supporting frame 3, the metal pipe fitting 13 is an aluminum pipe, an iron pipe or a steel pipe and other metal pipe, and the upper end of the metal pipe fitting 13 is close to the inner wall of the top end of the supporting frame 3. The gas generating assembly 2 is a gas pill, the trigger electrode 14 is led out from the gas generating assembly 2 to the supporting frame body 3, the supporting frame body 3 is wrapped outside the gas pill, when the gas pill is released, due to the effect of high-temperature strong air flow, the L-shaped annular sleeve 4 on the inner wall of the bottom of the supporting frame body 3 can be outwards expanded to be clung to the metal pipe fitting 13, the metal pipe fitting 13 is extruded between the inner side wall of the supporting frame body 3, so that the tightness of the gas generating assembly 2 in the groove 12 is enhanced, and most of high-temperature strong air flow enters the arc extinguishing cylinder 9 below through the air injection hole 5 and the sealing interface connecting assembly 1 to be released, so that the aim of arc extinguishing operation is achieved.
In the present invention, as shown in fig. 2 and 3, the sealing interface connection assembly 1 includes an elastic sleeve 8 for providing axial supporting pressure and a supporting housing 10 for providing a high-temperature air flow channel, the turntable 11 and the sealing interface connection assembly 1 are sealed in the same cavity, and the top end of the arc extinguishing cylinder 9 is in butt joint sealing communication with the air injection hole 5 at the bottom of the groove 12 through the supporting frame 3, so that the sealing interface connection assembly 1 is effectively sealed in the communication state of the supporting housing 10, the elastic sleeve 8 is a telescopic tube or a spring, the arc extinguishing cylinder 9 is a cylindrical cylinder, the inside of the arc extinguishing cylinder is hollow, and the upper part of the arc extinguishing cylinder 9 is connected with the telescopic tube; the elastic sleeve 8 is sleeved at the top end of the arc extinguishing cylinder 9, the upper end and the lower end of the supporting shell 10 are respectively provided with an upper opening 10a and a lower opening 10b, the air jet hole 5 at the bottom of the groove 12 is in sealing contact communication with the upper opening 10a of the supporting shell 10, the lower opening 10b of the supporting shell 10 is connected at the top end of the elastic sleeve 8, the top end of the arc extinguishing cylinder 9 is supported and connected with the supporting shell 10 through the elastic sleeve 8, the upper opening 10a of the supporting shell 10 is separated from or in sealing contact communication with the air jet hole 5 at the bottom of the groove 12 under the action of the elastic sleeve 8, a U-shaped sealing ring 7 is arranged in the supporting shell 10, the center of the U-shaped sealing ring 7 is provided with a U-shaped groove 70, a skirt 6 is sleeved at the upper opening 10a of the supporting shell 10, the skirt 6 is nested in a gap between the upper end of the U-shaped sealing ring 7 and the upper opening 10a of the supporting shell 10, the upper end opening of the skirt 6 is communicated with the top end 5, the upper opening 10a of the supporting shell 9 is separated from or in sealing contact with the air jet hole 5 at the bottom of the supporting shell 10b, and the upper opening 10b of the supporting shell 10 is tightly communicated with the upper opening 10b of the supporting shell 10 b. In the invention, the air balls in the gas generating component 2 are wrapped by the supporting frame body 3 from four sides, so that leakage of high-temperature strong air flow from gaps is avoided, when the gas generating component 2 is triggered to generate a large amount of high-strength air, gaps between the gas generating component 2 and the supporting frame body 3 are blocked, most air flow enters the arc extinguishing cylinder 9 from the sealing interface connecting component 1, the sealing interface connecting component 1 is compressed under the action of the air flow, the air flow can recover after disappearing, the elasticity of the sealing interface connecting component 1 disappears until the time between the disappearance of the air flow and the generation of the high-strength air flow is reached, and the turntable 11 is provided with a prescribed action to rotate a lattice, so that sequential clamping of the gas generating component 2 in each groove 12 can be realized. When the gas generating assembly 2 is triggered, the rotating disc 11 can be specifically referred to as 201610747255.3, and the patent name is: the lightning-induced solid-phase arc extinguishing lightning protection device adopts the technical scheme of the rotary clamping position, not only ensures reliable rotation and reliable customization, but also ensures reliable dragging after triggering and prevents the rotating disc from rotating by mistake, therefore, when the gas generating component 2 on the rotating disc 11 is triggered, the ejected gas flow can not leak at the joint of the rotating disc 11 and the arc extinguishing cylinder 9 through the sealing interface connecting component 1, the ejected gas flow can act on the arc extinguishing cylinder to the maximum extent, and the gas generating component 2 and the supporting shell 10 are respectively sealed under the action of the elastic sleeve component 8 and the U-shaped sealing ring 7.
In the present invention, as shown in fig. 2 and 5, the top end of the arc extinguishing cylinder 9 has a supporting section 90, a neck 91 and an annular clamping portion 92, the neck 91 is on the supporting section 90 and contracts toward the center of the arc extinguishing cylinder 9, the elastic sleeve member 8 is sleeved on the neck 91, the upper end of the elastic sleeve member 8 is connected with the outer wall of the lower end of the supporting housing 10, the lower end of the elastic sleeve member 8 is connected with the supporting section 90, so that the supporting housing 10 is supported and connected with the elastic sleeve member 8, and the neck 91 is abutted with the supporting housing 10 in the sealing housing 100 and kept sealed, so that the elastic sleeve member 8 is sleeved on the neck 91 and firmly supported on the supporting section 90, and the supporting housing 10 is ensured not to shift when being extruded on the elastic sleeve member 8 and slid up and down. The supporting shell 10 is a rigid supporting body, the inner U-shaped sealing ring 7 and the top end inner wall of the elastic sleeve 8 (telescopic pipe or spring) are mutually nested, so as to improve the tightness, and the upper end of the neck 91 extends into the lower opening 10b of the supporting shell 10 and is tightly contacted and sealed with the U-shaped sealing ring 7; the annular clamping portion 92 is arranged on the top end outer wall of the neck portion 91 and protrudes vertically outwards along the top end outer wall of the neck portion 91, and the annular clamping portion 92 extends into the lower opening portion 10b of the support housing 10 and is in close contact with the U-shaped sealing ring 7. The length of the neck 91 is between 1.2cm and 4cm, so that when the elastic sleeve 8 is compressed under the action of high-temperature strong air flow, the elastic sleeve 8 has enough compression distance on the neck 91, the supporting shell 10 and the air injection holes 5 can have enough separation time so as to enter the next sealing contact again when the turntable rotates, the diameter of the neck 91 is 2 mm-20 mm, the flow and the pressure of the high-temperature strong air flow are ensured when the high-temperature strong air flow is sprayed out, and enough impact force is applied to the supporting shell 10 and the elastic sleeve 8 is compressed; in the invention, the skirt 6 is nested in a gap between the upper end of the U-shaped sealing ring and the upper end of the supporting shell; the diameter of the inlet of the skirt edge 6 is larger than the diameter of the air outlet of the air generating assembly 2, so that most of air is ensured to enter the arc extinguishing cylinder; the U-shaped sealing ring material can be rubber, silica gel or other new materials, and needs to be high-temperature resistant, ageing resistant and high in elasticity. The function is as follows: under the action of high-temperature jet air flow, the U-shaped sealing ring is inflated upwards and downwards simultaneously, so that the skirt edge is clung to the upper end of the support shell 10, the lower end of the U-shaped sealing ring is clung to the lower end of the support shell 10, and a gap is blocked to improve the tightness; when the gas generating assembly 2 is triggered in the groove 12 through the trigger electrode 14 to generate strong air flow, the generated strong air flow is sprayed to the air spraying holes 5 under the sealed condition, the strong air flow sprayed from the air spraying holes 5 is sprayed into the supporting shell 10, the elastic sleeve member 8 is compressed and moves downwards under the action of high-temperature sprayed air flow, when the air flow disappears, the rotary table 11 rotates to the next gas generating pill along the rotary shaft 101, the elastic sleeve member 8 is restored to the original position and realizes clamping, and the air spraying holes 5 at the upper opening part 10a of the supporting shell 10 are restored to the sealed state again, so that the arc extinguishing operation is achieved.
In the present invention, as shown in fig. 2, 3 and 5, after the annular clamping portion 92 extends into the lower opening 10b of the support housing 10, the annular clamping portion 92 is clamped in a gap between the U-shaped sealing ring 7 and the bottom of the support housing 10, so that the annular clamping portion 92 is better sealed between the U-shaped sealing ring 7 and the bottom of the support housing 10, and it is ensured that the annular clamping portion 92 cannot slide from the bottom of the support housing 10 to be separated.
In the present invention, as shown in fig. 2, 3 and 5, after the annular clamping portion 92 extends into the lower opening 10b of the support housing 10, the annular clamping portion 92 is clamped on the inner wall of the bottom end of the U-shaped sealing ring 7, so that the annular clamping portion 92 is better sealed between the U-shaped sealing ring 7 and the bottom of the support housing 10, and the annular clamping portion 92 is ensured not to slide from the support housing 10 to be separated, and the annular clamping portion 92 is not in direct contact with the bottom of the support housing 10, so that the buffer effect is achieved, the frictional contact between the annular clamping portion 92 and the support housing 10 is reduced, and the service life of the air flow sealing assembly is improved.
In the present invention, as shown in fig. 1, 2 and 5, when the gas generating assembly 2 is triggered one by one in the groove 12 on the rotary disk 11 to generate strong gas flow, the generated strong gas flow is sprayed under sealed condition to achieve arc extinguishing operation, so that the gas generating assembly 2 is sealed and covered on a rotary disk 11, the rotary disk 11 rotates a lattice and the upper opening 10a of the upper end of the support housing 10 is communicated with the gas spraying holes 5 again to form a sealed state; when the gas generating assembly 2 is triggered in the groove 12 to generate strong air flow, the arc extinguishing cylinder 9 is used for sealing the interface connecting assembly 1 and vibrating relatively up and down, when the vibrating elastic force disappears, the sealing interface connecting assembly 1 is in sealing communication with the air spraying holes 5 again to provide supporting elastic force, the strong air flow sprayed from the air spraying holes 5 enables the supporting shell 10 and the top cylinder opening of the arc extinguishing cylinder 9 to relatively move and separate under the action of the elastic force, and after the elastic force disappears, the upper opening 10a at the upper end of the supporting shell 10 is in communication sealing with the air spraying holes 5 again, so that the turntable 11 and the arc extinguishing cylinder 9 form a sealing state through the sealing interface connecting assembly 1; therefore, when the gas generating assembly 2 is sealed and coated on a rotatable turntable 11, the gas generating assembly 2 is triggered one by one in the grooves 30 on the turntable 11 to generate strong air flow, and the generated strong air flow is sprayed under the sealed condition to achieve the arc extinguishing operation.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (10)
1. A sealing method based on a lightning protection arc extinguishing airflow channel interface is characterized by comprising the following steps: the lightning protection arc extinguishing airflow channel interface comprises a sealing interface connecting component (1) which is mutually communicated with a rotary table (11) and an arc extinguishing cylinder (9), the arc extinguishing cylinder (9) and the rotary table (11) are sealed under the supporting pressure of the sealing interface connecting component (1), and the sealing method comprises the following steps:
step 1: the gas generating assembly (2) is arranged in the turntable (11), so that the gas generating assembly (2) can generate strong airflow acting force under the triggering condition; the setting of the gas generating component (2) in the turntable comprises the following steps:
step 10, sealing the turntable, and arranging a plurality of evenly distributed grooves (12) on the surface of the turntable (11) along the circumferential direction, so that the depth of the grooves (12) is more than or equal to twice the width;
step 11, forming an air jet hole (5) for jetting air flow at the bottom of each groove (12); the lower end of the sealing interface connecting component (1) is connected with the top end of the arc extinguishing cylinder (9) through upward axial supporting pressure, the upper end of the sealing interface connecting component (1) is extruded with at least one air spraying hole (5) at the bottom of the groove (12) through the axial supporting pressure, and the upper end of the sealing interface connecting component (1) is caused to be communicated with the air spraying hole (5) at the bottom of the groove (12) in a sealing contact manner;
step 12, sequentially sleeving an L-shaped annular sleeve (4), a metal pipe fitting (13) and a supporting frame body (3) outside the gas generating assembly (2), and sequentially wrapping the gas generating assembly (2) from inside to outside;
step 2: the strong air flow acts on the sealing interface connecting assembly (1), and most of the strong air flow enters the arc extinguishing cylinder (9) through the sealing interface connecting assembly (1) under the radial constraint condition of the sealing interface connecting assembly (1) on the strong air flow;
step 3: judging whether the acting force of the strong air flow is larger than the supporting pressure of the sealing interface connecting assembly (1) according to the radial constraint condition of the sealing interface connecting assembly (1) on the strong air flow, if the acting force of the strong air flow is smaller than the supporting pressure of the sealing interface connecting assembly (1), enabling the supporting pressure of the sealing interface connecting assembly (1) to restore to the original position, and if the acting force of the strong air flow is larger than the supporting pressure of the sealing interface connecting assembly (1), repeating the step (2) until the supporting pressure of the sealing interface connecting assembly (1) restores to the original position.
2. The sealing method based on the lightning protection and arc extinguishing airflow channel interface according to claim 1, wherein the sealing method comprises the following steps: in step 2, applying a strong air flow to the sealed interfacing assembly (1) comprises the steps of:
step 20: a supporting section (90) is arranged at the top of the arc extinguishing cylinder (9), a rigid neck (91) is fixedly connected to the supporting section (90), and an annular clamping part (92) which protrudes outwards vertically is arranged on the outer wall of the top end of the neck (91);
step 21: an elastic sleeve (8) is sleeved on the outer wall of the neck (91) between the annular clamping part (92) and the supporting section (90), and the diameter of the neck (91) is the same as the inner diameter of the arc extinguishing cylinder (9);
step 22: a rigid supporting shell (10) is arranged above the elastic sleeve (8), the lower opening part of the supporting shell (10) is fixedly connected with the top of the elastic sleeve (8), and then the annular clamping part (92) is sleeved in the supporting shell (10);
step 23: at least one skirt edge (6) is arranged below the air injection hole (5), the diameter of the inlet of the skirt edge (6) is larger than that of the air injection hole (5) so as to prevent air flow from leaking out, and the outlet of the skirt edge (6) is nested in the upper opening part of the support shell (10);
step 24: a U-shaped sealing ring (7) is arranged between the upper opening part and the lower opening part of the supporting shell (10), and the U-shaped sealing ring (7) is used for blocking a gap at the joint of the supporting shell (10) and the skirt edge (6) and a gap at the joint of the supporting shell (10) and the annular clamping part (92), so that most of strong air flow enters the arc extinguishing cylinder (9) from the sealing interface connecting assembly (1) under the radial constraint condition of strong air flow.
3. The sealing method based on the lightning protection and arc extinguishing airflow channel interface according to claim 1, wherein the sealing method comprises the following steps: when the gas generating component (2) can generate strong airflow acting force under the triggering condition and the gas generating component (2) is triggered to generate high-temperature strong airflow, the acting force of the high-temperature strong airflow sprayed out from the air spraying holes (5), and the gas generating component (2) is triggered to generate high-temperature strong airflow in the sealed groove (12).
4. The sealing method based on the lightning protection and arc extinguishing airflow channel interface according to claim 1, wherein the sealing method comprises the following steps: the arc extinguishing cylinder is characterized by further comprising the step of sealing the turntable (11) and the sealing interface connecting assembly (1) in the same cavity, and enabling the top end of the arc extinguishing cylinder (9) to be in butt joint sealing communication with the air spraying hole (5) at the bottom of the groove (12) through the supporting frame body (3).
5. A method of sealing a lightning protection arc chute based interface according to claim 1 or 2 or 4, characterized by: the sealing interface connection assembly (1) comprises an elastic sleeve (8) for providing axial supporting pressure and a supporting shell (10) for providing a high-temperature airflow channel, the elastic sleeve (8) is sleeved on the top end of the arc extinguishing cylinder (9), an upper opening (10 a) and a lower opening (10 b) are respectively arranged at the upper end and the lower end of the supporting shell (10), the air injection hole (5) at the bottom of the groove (12) is in sealing contact communication with the upper opening (10 a) of the supporting shell (10), the lower opening (10 b) of the supporting shell (10) is connected to the top end of the elastic sleeve (8), and the top end of the arc extinguishing cylinder (9) is connected with the supporting shell (10) through the supporting of the elastic sleeve (8), so that the upper opening (10 a) of the supporting shell (10) is separated from or in sealing contact communication with the air injection hole (5) at the bottom of the groove (12) under the action of the elastic sleeve (8).
6. The sealing method based on the lightning protection and arc extinguishing airflow channel interface according to claim 5, wherein the sealing method comprises the following steps: be provided with U type sealing washer (7) in support casing (10), the department cover at the upper shed portion (10 a) of support casing (10) is equipped with shirt rim (6), and this shirt rim (6) nest in the space between the upper end of U type sealing washer (7) and the upper shed portion (10 a) of support casing (10), the upper shed portion of shirt rim (6) with fumarole (5) intercommunication, arc extinguishing cylinder (9) top stretches into lower shed portion (10 b) of support casing (10) and with U type sealing washer (7) in close contact with, makes the top of arc extinguishing cylinder (9) communicate with lower shed portion (10 b) of support casing (10).
7. The sealing method based on the lightning protection and arc extinguishing airflow channel interface according to claim 6, wherein the sealing method comprises the following steps: the top end of the arc extinguishing cylinder (9) is provided with a supporting section (90), a neck (91) and an annular clamping part (92), the neck (91) is arranged on the supporting section (90) and contracts towards the center of the arc extinguishing cylinder (9), the elastic sleeve (8) is sleeved on the neck (91), the upper end of the elastic sleeve (8) is connected with the outer wall of the lower end of the supporting shell (10), the lower end of the elastic sleeve (8) is connected with the supporting section (90), so that the supporting shell (10) is supported and connected on the elastic sleeve (8), and the upper end of the neck (91) extends into the lower opening part (10 b) of the supporting shell (10) and is in tight contact with the U-shaped sealing ring (7); the annular clamping part (92) is arranged on the outer wall of the top end of the neck part (91) and protrudes outwards and perpendicularly along the outer wall of the top end of the neck part (91), and the annular clamping part (92) stretches into the lower opening part (10 b) of the support shell (10) and is in close contact with the U-shaped sealing ring (7).
8. The sealing method based on the lightning protection and arc extinguishing airflow channel interface according to claim 7, wherein the sealing method comprises the following steps: after the annular clamping part (92) stretches into the lower opening part (10 b) of the support shell (10), the annular clamping part (92) is clamped in a gap between the U-shaped sealing ring (7) and the bottom of the support shell (10).
9. The sealing method based on the lightning protection and arc extinguishing airflow channel interface according to claim 8, wherein the sealing method comprises the following steps: after the annular clamping part (92) stretches into the lower opening part (10 b) of the supporting shell (10), the annular clamping part (92) is clamped on the inner wall of the bottom end of the U-shaped sealing ring (7).
10. The sealing method based on the lightning protection and arc extinguishing airflow channel interface according to claim 1, wherein the sealing method comprises the following steps: the diameter of the groove (12) is not more than 20mm, and the depth of the groove (12) is 40-50mm.
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| CN201910299958.8A CN111834892B (en) | 2019-04-15 | 2019-04-15 | Sealing method based on lightning protection and arc extinguishing airflow channel interface |
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| CN109360697A (en) * | 2018-11-07 | 2019-02-19 | 南宁超伏电气科技有限公司 | The jet-stream wind arc extinguishing lightning protection device of dual triggering |
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| CN102737795A (en) * | 2011-04-12 | 2012-10-17 | 王巨丰 | 10-35kV overhead transmission line constraint space injection gas arc extinguishing lightning protection gap apparatus |
| CN102856021A (en) * | 2012-09-27 | 2013-01-02 | 王巨丰 | Follow current-free arc lightening-protection gap protection device |
| CN203787766U (en) * | 2014-03-26 | 2014-08-20 | 王嬿蕾 | Composite jet stream lightning protection and arc extinguishing gap device |
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| CN111834892A (en) | 2020-10-27 |
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