CN117594343A - DC sleeve - Google Patents
DC sleeve Download PDFInfo
- Publication number
- CN117594343A CN117594343A CN202311648012.0A CN202311648012A CN117594343A CN 117594343 A CN117594343 A CN 117594343A CN 202311648012 A CN202311648012 A CN 202311648012A CN 117594343 A CN117594343 A CN 117594343A
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- China
- Prior art keywords
- outdoor
- indoor
- flange
- insulator
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 238000002347 injection Methods 0.000 claims abstract description 10
- 239000007924 injection Substances 0.000 claims abstract description 10
- 239000012212 insulator Substances 0.000 claims description 82
- 239000007789 gas Substances 0.000 claims description 73
- 230000007704 transition Effects 0.000 claims description 57
- 238000007789 sealing Methods 0.000 claims description 26
- 239000004593 Epoxy Substances 0.000 claims description 11
- 210000004907 gland Anatomy 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 229910018503 SF6 Inorganic materials 0.000 description 16
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 16
- 229960000909 sulfur hexafluoride Drugs 0.000 description 16
- 239000000126 substance Substances 0.000 description 15
- 238000004519 manufacturing process Methods 0.000 description 12
- 231100000252 nontoxic Toxicity 0.000 description 8
- 230000003000 nontoxic effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 231100000331 toxic Toxicity 0.000 description 6
- 230000002588 toxic effect Effects 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000005431 greenhouse gas Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- QHMQWEPBXSHHLH-UHFFFAOYSA-N sulfur tetrafluoride Chemical compound FS(F)(F)F QHMQWEPBXSHHLH-UHFFFAOYSA-N 0.000 description 2
- 239000002341 toxic gas Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/321—Insulating of coils, windings, or parts thereof using a fluid for insulating purposes only
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/56—Insulating bodies
- H01B17/58—Tubes, sleeves, beads, or bobbins through which the conductor passes
- H01B17/583—Grommets; Bushings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/085—Cooling by ambient air
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/20—Cooling by special gases or non-ambient air
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulators (AREA)
Abstract
The invention discloses a direct current sleeve, which relates to the technical field of transformers and comprises the following components: the casing body comprises an indoor casing and an outdoor casing, and the indoor casing is connected with the outdoor casing through an intermediate flange; the current-carrying core tube is arranged in the sleeve body and comprises a current-carrying guide tube and an insulating core body sleeved outside the current-carrying guide tube, environment-friendly insulating gas is filled between the current-carrying core tube and the sleeve body, and the environment-friendly insulating gas is injected into the sleeve body through a gas injection hole arranged in the middle flange. According to the direct current sleeve, the environment-friendly insulating gas is injected between the current-carrying core tube and the sleeve body through the gas injection hole arranged in the middle flange to serve as an auxiliary insulating medium, so that the insulativity of the direct current sleeve is ensured, and meanwhile, the harm to human bodies and the environment is reduced.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to a direct current sleeve.
Background
The direct current sleeve is used for power transmission connection of valve halls and external important equipment, and the direct current sleeve is required to bear system voltage and current of a direct current system. The safety and quality of the direct current sleeve directly influence whether the power transmission line can run safely and reliably.
In the prior art, the direct current sleeve uses sulfur hexafluoride gas as a main insulating medium or an auxiliary insulating medium, wherein the sulfur hexafluoride gas belongs to greenhouse gas, the single-molecule greenhouse effect of the sulfur hexafluoride gas is 2.2 ten thousand times of that of carbon dioxide, the sulfur hexafluoride gas can exist in the atmosphere for a long time under high chemical stability, and when equipment fails, the sulfur hexafluoride gas is electrolyzed to be toxic gas such as sulfur tetrafluoride, so that the sulfur hexafluoride gas is harmful to human bodies and the environment.
In addition, in the production and manufacturing process of the sleeve, sulfur hexafluoride gas needs to be recovered in time, so that the production process is complicated, and the production period is prolonged.
Therefore, how to reduce the harm to human body and environment while ensuring the insulation of the direct current bushing is a technical problem to be solved by the technicians in the field.
Disclosure of Invention
In view of the above, the present invention is directed to a dc bushing, which is capable of reducing the harm to human body and environment while ensuring the insulation of the dc bushing.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a dc bushing, comprising:
the sleeve body comprises an indoor sleeve and an outdoor sleeve, and the indoor sleeve and the outdoor sleeve are connected through an intermediate flange;
the current-carrying core pipe is arranged in the sleeve body, the current-carrying core pipe comprises a current-carrying guide pipe and an insulating core body sleeved outside the current-carrying guide pipe, environment-friendly insulating gas is filled between the current-carrying core pipe and the sleeve body, and the environment-friendly insulating gas is injected into the sleeve body through a gas injection hole arranged in the middle flange.
Optionally, in the dc bushing, the indoor bushing includes an indoor head structure and an indoor insulator detachably connected to the indoor head structure; the outdoor sleeve comprises an outdoor head structure and an outdoor insulator detachably connected with the outdoor head structure; the indoor insulator is detachably connected with the outdoor insulator through the middle flange.
Optionally, in the dc bushing, the indoor head structure includes an indoor equalizing ring disposed outside the first end of the indoor insulator and an indoor terminal located in the indoor equalizing ring, the indoor terminal is connected to the first end of the current-carrying conduit, and the second end of the indoor insulator is connected to the middle flange through a bolt;
the outdoor head structure is including set up in outdoor equalizer ring in the first end outside of outdoor insulator with be located outdoor binding post in the outdoor equalizer ring, outdoor binding post with the second end of current-carrying pipe is connected, the second end of outdoor insulator with intermediate flange passes through bolted connection.
Optionally, in the dc bushing, a spring device is disposed between the indoor terminal and the first end of the indoor insulator, the spring device is sleeved on the outer side of the current-carrying conduit, and the spring device is located in the indoor insulator, and is connected with the indoor terminal through an indoor flange bolt, and is connected with the first end of the indoor insulator through an indoor transition flange bolt, and the indoor equalizing ring is connected to the indoor transition flange through a bolt; the outdoor wiring terminal is connected with the first end of the outdoor insulator through an outdoor flange assembly.
Optionally, in the dc bushing, the outdoor flange assembly includes an outdoor flange bolted to the outdoor connection terminal and an outdoor transition flange bolted to a first end of the outdoor insulator, the outdoor flange is bolted to the outdoor transition flange, an outdoor shielding ring is disposed on an outer side of a second end of the current-carrying conduit, and the outdoor shielding ring is fixed on an inner side of the outdoor transition flange, so that the outdoor shielding ring is located in the outdoor insulator, and the outdoor equalizing ring is connected to the outdoor transition flange through bolts; an indoor shielding ring is arranged on the outer side of the spring device, and the indoor shielding ring is fixed on the inner side of the indoor transition flange.
Optionally, in the dc bushing, an indoor pressure cover is disposed between the indoor terminal and the indoor flange, the indoor pressure cover is connected to the indoor flange in a sealing manner, the indoor terminal and the first end of the current-carrying conduit are in interference fit through an indoor current-carrying watchband, and an indoor clamping slot for fixing the indoor current-carrying watchband is disposed on an inner wall of the indoor terminal;
the outdoor flange with be provided with outdoor gland between the outdoor transition flange, outdoor gland sealing connection in on the outdoor transition flange, just outdoor binding post with the second end of current-carrying pipe is through outdoor current-carrying watchband interference fit, be provided with on the inner wall of outdoor binding post and be used for fixing outdoor joint groove of outdoor current-carrying watchband.
Optionally, in the dc bushing, the intermediate flange includes an intermediate transition flange and a connection sleeve connected to the intermediate transition flange, a first side of the intermediate transition flange is bolted to the second end of the indoor insulator, and the connection sleeve is bolted to the second end of the outdoor insulator;
the second side of the intermediate transition flange is connected with a clamping sleeve, the clamping sleeve is positioned on the inner side of the connecting sleeve, and the clamping sleeve is in interference fit with the insulating core body;
and the connecting sleeve is provided with a test tap device so that the insulating core body is grounded through the test tap device.
Optionally, in the above dc bushing, a plurality of outdoor ventilation holes are formed at a connection end of the connection sleeve and the outdoor insulator, the outdoor ventilation holes are used for communicating an inner cavity of the outdoor insulator with a cavity of the intermediate flange, and the outdoor ventilation holes are uniformly spaced along a circumferential direction of the connection sleeve; the inner wall of the intermediate transition flange is provided with a plurality of indoor vent holes, the indoor vent holes are used for communicating the inner cavity of the indoor insulator with the cavity of the intermediate flange, and the indoor vent holes are uniformly arranged at intervals along the circumferential direction of the intermediate transition flange; the outdoor vent hole and the indoor vent hole are mutually communicated through the cavity of the middle flange, so that the environment-friendly insulating gas is mutually communicated with the inner cavity of the outdoor insulator and the inner cavity of the indoor insulator.
Optionally, in the dc bushing, the insulating core includes a coiled pipe and an epoxy core sleeved outside the coiled pipe, the epoxy core is connected with the coiled pipe by a casting method, and the epoxy core is a fusiform cylinder, so as to increase rigidity of the insulating core.
Optionally, in the dc bushing, the environment-friendly insulating gas is nitrogen or air.
According to the direct current sleeve provided by the invention, the current-carrying core pipe is arranged in the sleeve body, the sleeve body is connected with the outdoor sleeve through the middle flange, and meanwhile, the current-carrying core pipe consists of the current-carrying guide pipe bearing the current-carrying effect and the insulating core body sleeved outside the current-carrying guide pipe and playing an insulating effect. In addition, the environment-friendly insulating gas is injected between the current-carrying core tube and the sleeve body through the gas injection hole arranged in the middle flange to serve as an auxiliary insulating medium, the required insulating performance of the direct-current sleeve is realized by adjusting the pressure value of the environment-friendly insulating gas, the environment-friendly insulating gas is nontoxic and harmless, when equipment breaks down, the environment-friendly insulating gas cannot generate toxic and harmful substances after being electrolyzed, the chemical stability is good, meanwhile, the heat conducting performance of the environment-friendly insulating gas is good, and the temperature convection at the two ends of the indoor sleeve and the outdoor sleeve can be realized relatively quickly, so that the temperature balance of the direct-current sleeve is realized.
Compared with the prior art, the direct current bushing provided by the invention has the advantages that the environment-friendly insulating gas is injected between the current-carrying core tube and the bushing body through the gas injection hole arranged in the middle flange to serve as an auxiliary insulating medium, the required insulating performance of the direct current bushing can be realized by adjusting the pressure value of the environment-friendly insulating gas, compared with the traditional sulfur hexafluoride gas, the chemical property is more temperature, the environment-friendly insulating gas is nontoxic and harmless, toxic and harmful substances can not be generated after the environment-friendly insulating gas is electrolyzed when equipment breaks down, meanwhile, the heat conducting performance of the environment-friendly insulating gas is better, and the temperature convection of the two ends of the indoor bushing and the outdoor bushing can be realized relatively quickly, so that the temperature balance of the direct current bushing is realized, and the harm to human body and environment is reduced while the insulativity of the direct current bushing is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only embodiments of the present application, and other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a dc bushing according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an indoor sleeve according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an outdoor bushing according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an insulating core according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view of an intermediate flange provided in an embodiment of the present invention;
fig. 6 is a left side view of an intermediate flange provided by an embodiment of the present invention.
Wherein 100 is a sleeve body, 101 is an indoor sleeve, 1011 is an indoor head structure, 1012 is an indoor insulator, 1013 is an indoor equalizing ring, 1014 is an indoor terminal, 1015 is a spring device, 1016 is an indoor flange, 1017 is an indoor transition flange, 1018 is an indoor shielding ring, 1019 is an indoor pressure cover, 1020 is an indoor current carrying watchband, 102 is an outdoor sleeve, 1021 is an outdoor head structure, 1022 is an outdoor insulator, 1023 is an outdoor equalizing ring, 1024 is an outdoor connecting terminal, 1025 is an outdoor flange, 1026 is an outdoor transition flange, 1027 is an outdoor shielding ring, 1028 is an outdoor gland, 1029 is an outdoor current carrying watchband, 103 is an intermediate flange, 1032 is an intermediate transition flange, 1033 is a clamping sleeve, 1034 is a test tap device, 1035 is an outdoor vent hole, and 6 is an indoor vent hole;
200 is a current-carrying core tube, 201 is a current-carrying conduit, 202 is an insulating core, 2021 is a coiled tube, 2022 is an epoxy core;
300 is an environment-friendly insulating gas.
Detailed Description
The invention aims at providing a direct current sleeve so as to reduce harm to human bodies and environment while ensuring the insulativity of the direct current sleeve.
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
As shown in fig. 1, an embodiment of the present invention discloses a dc bushing, which includes a bushing body 100 and a current-carrying core tube 200. It should be noted that, in the prior art, the conventional dc bushing uses sulfur hexafluoride gas as a main insulating medium or an auxiliary insulating medium, wherein the sulfur hexafluoride gas belongs to a greenhouse gas, the greenhouse effect of a single molecule of the sulfur hexafluoride gas is 2.2 ten thousand times that of carbon dioxide, the sulfur hexafluoride gas can exist in the atmosphere for a long time under high chemical stability, and when the equipment fails, the sulfur hexafluoride gas is electrolyzed into toxic gases such as sulfur tetrafluoride, which causes harm to human body and environment. In addition, in the production and manufacturing process of the sleeve, sulfur hexafluoride gas needs to be recovered in time, so that the production process is complicated, and the production period is prolonged. According to the direct current bushing disclosed by the embodiment of the invention, the environment-friendly insulating gas 300 is injected between the current-carrying core tube 200 and the bushing body 100 through the gas injection hole arranged on the middle flange 103 to serve as an auxiliary insulating medium, the required insulating performance of the direct current bushing can be realized by adjusting the pressure value of the environment-friendly insulating gas 300, compared with the traditional sulfur hexafluoride gas, the chemical property is more temperature, the environment-friendly insulating gas 300 is nontoxic and harmless, when equipment fails, the environment-friendly insulating gas 300 is electrolyzed, no toxic and harmful substances are generated, meanwhile, the heat conducting property of the environment-friendly insulating gas 300 is better, and the temperature convection of the two ends of the indoor bushing 101 and the outdoor bushing 102 can be realized quickly, so that the temperature balance of the direct current bushing is realized, the insulativity of the direct current bushing is ensured, and the harm to human body and environment is reduced.
As shown in fig. 1, the casing body 100 includes an indoor casing 101 and an outdoor casing 102, and the indoor casing 101 and the outdoor casing 102 are connected by an intermediate flange 103. Specifically, the indoor pipe 101 includes an indoor head structure 1011 and an indoor insulator 1012 detachably connected to the indoor head structure 1011, the outdoor pipe 102 includes an outdoor head structure 1021 and an outdoor insulator 1022 detachably connected to the outdoor head structure 1021, and the indoor insulator 1012 and the outdoor insulator 1022 are detachably connected through an intermediate flange 103.
Meanwhile, the current-carrying core tube 200 is disposed in the sleeve body 100, and the current-carrying core tube 200 includes a current-carrying conduit 201 and an insulating core 202 sleeved outside the current-carrying conduit 201, an environment-friendly insulating gas 300 is filled between the current-carrying core tube 200 and the sleeve body 100, and the environment-friendly insulating gas 300 is injected into the sleeve body 100 through a gas injection hole disposed in the middle flange 103 to serve as an auxiliary insulating medium. At this time, the required insulating property of the direct current sleeve can be realized by adjusting the pressure value of the environment-friendly insulating gas 300, and the environment-friendly insulating gas 300 is nontoxic and harmless, when equipment fails, the environment-friendly insulating gas 300 is electrolyzed and can not generate toxic and harmful substances, the chemical property is stable, meanwhile, the heat conducting property of the environment-friendly insulating gas 300 is good, the temperature convection at the two ends of the indoor sleeve 101 and the outdoor sleeve 102 can be realized quickly, so that the temperature balance of the direct current sleeve is realized, the insulativity of the direct current sleeve is ensured, and meanwhile, the harm to human bodies and the environment is reduced. In this embodiment, the environment-friendly insulating gas 300 may be air or nitrogen, and the chemical properties of the environment-friendly insulating gas 300 are stable, and the environment-friendly insulating gas 300 is nontoxic and harmless, and even if leakage occurs, the environment cannot be damaged, so that the problem that in the sleeve production and manufacturing process, timely recovery is required is avoided, the production process is simplified, and the production period is shortened.
Further, as shown in fig. 1 and fig. 4, in a specific embodiment, the insulating core 202 includes a coiled pipe 2021 and an epoxy core 2022 sleeved outside the coiled pipe 2021, the epoxy core 2022 is connected with the coiled pipe 2021 by casting, and the epoxy core 2022 is a fusiform cylinder, so that the epoxy core 2022 has the characteristics of large middle diameter and small diameters at two ends, and the inner cavity space of the sleeve body 100 is increased, so that the temperature convection at two ends of the indoor sleeve 101 and the outdoor sleeve 102 is ensured, and the rigidity of the insulating core 202 is increased while the temperature balance of the direct current sleeve is realized, and the rigidity and strength of the whole current-carrying core pipe 200 are further increased. The indoor side of the insulating core 202 is in threaded connection with the current-carrying conduit 201 through the indoor special nut, and the outdoor side of the insulating core 202 is in pin connection with the current-carrying conduit 201 through the outdoor special nut, so that the connection reliability of the insulating core 202 and the current-carrying conduit 201 is guaranteed, the insulating core 202 has a better insulating effect, meanwhile, an inner cavity space formed between the insulating core 202 and the inner wall of the sleeve body 100 can ensure that the environment-friendly insulating gas 300 flows in the indoor sleeve 101 and the outdoor sleeve 102, temperature convection at two ends of the indoor sleeve 101 and the outdoor sleeve 102 is realized quickly, temperature balance of the direct-current sleeve is realized, and stable operation of the direct-current sleeve is guaranteed.
The direct current bushing disclosed by the embodiment of the invention is characterized in that the current-carrying core tube 200 is arranged in the bushing body 100, the bushing body 100 is connected with the outdoor bushing 102 through the middle flange 103 by the indoor bushing 101, and meanwhile, the current-carrying core tube 200 is composed of a current-carrying conduit 201 bearing a current-carrying function and an insulating core body 202 sleeved outside the current-carrying conduit 201 and playing an insulating function. In addition, the environment-friendly insulating gas 300 is injected between the current-carrying core pipe 200 and the sleeve body 100 through the gas injection hole arranged on the middle flange 103 to serve as an auxiliary insulating medium, the required insulating performance of the direct-current sleeve is realized by adjusting the pressure value of the environment-friendly insulating gas 300, the environment-friendly insulating gas 300 is nontoxic and harmless, when equipment fails, the environment-friendly insulating gas 300 cannot generate toxic and harmful substances after being electrolyzed, the chemical stability is good, and the environment-friendly insulating gas 300 is nontoxic and harmless per se, and even if leakage occurs, the environment cannot be damaged. Meanwhile, the environment-friendly insulating gas 300 has good heat conducting performance, and can realize temperature convection at two ends of the indoor sleeve 101 and the outdoor sleeve 102 faster, so that temperature balance of the direct current sleeve is realized.
Compared with the prior art, the direct current bushing disclosed by the embodiment of the invention has the advantages that the environment-friendly insulating gas 300 is injected between the current-carrying core tube 200 and the bushing body 100 through the gas injection hole arranged on the middle flange 103 to serve as an auxiliary insulating medium, the required insulating performance of the direct current bushing can be realized by adjusting the pressure value of the environment-friendly insulating gas 300, compared with the traditional sulfur hexafluoride gas, the chemical property is higher, the environment-friendly insulating gas 300 is nontoxic and harmless, when equipment fails, the environment-friendly insulating gas 300 can not generate toxic and harmful substances after being electrolyzed, meanwhile, the heat conducting performance of the environment-friendly insulating gas 300 is better, and the temperature convection of the two ends of the indoor bushing 101 and the outdoor bushing 102 can be realized quickly, so that the temperature balance of the direct current bushing is realized, the insulativity of the direct current bushing is ensured, and the harm to human body and the environment is reduced.
Further, as shown in FIG. 1, in one embodiment, the indoor sleeve 101 includes an indoor head structure 1011 and an indoor insulator 1012 removably connected to the indoor head structure 1011. The outdoor bushing 102 includes an outdoor head structure 1021 and an outdoor insulator 1022 detachably connected to the outdoor head structure 1021. Meanwhile, the indoor insulator 1012 and the outdoor insulator 1022 are detachably connected through the intermediate flange 103. Specifically, as shown in fig. 2, the indoor head structure 1011 includes an indoor grading ring 1013 disposed outside the first end of the indoor insulator 1012 and an indoor terminal 1014 disposed in the indoor grading ring 1013, an indoor clamping groove for fixing an indoor current carrying watchband 1020 is disposed on the inner wall of the indoor terminal 1014, and the indoor terminal 1014 and the first end of the current carrying conduit 201 are in interference fit through the indoor current carrying watchband 1020 fixed in the indoor clamping groove, so as to ensure that the indoor current carrying watchband 1020 contacts with the first end of the current carrying conduit 201, thereby realizing current flow, and high voltage can be uniformly distributed around the indoor terminal 1014 through the indoor grading ring 1013, ensuring that there is no potential difference between annular parts of the indoor grading ring 1013, and achieving the effect of voltage equalizing. As shown in fig. 1, the second end of the indoor insulator 1012 is provided with an indoor connection flange which is in sealing connection with the middle flange 103 through bolts, and the indoor connection flange is connected with the second end of the indoor insulator 1012 through pouring, and meanwhile, a sealing ring is arranged between the indoor connection flange and the middle flange 103, so that the second end of the indoor insulator 1012 is in sealing connection with the middle flange 103.
As shown in fig. 3, the outdoor head structure 1021 includes an outdoor equalizing ring 1023 disposed outside a first end of the outdoor insulator 1022 and an outdoor connecting terminal 1024 disposed in the outdoor equalizing ring 1023, an outdoor clamping groove for fixing an outdoor current-carrying watchband 1029 is disposed on an inner wall of the outdoor connecting terminal 1024, and the outdoor connecting terminal 1024 and a second end of the current-carrying conduit 201 are in interference fit with each other through the outdoor current-carrying watchband 1029 fixed in the outdoor clamping groove, so that the outdoor current-carrying watchband 1029 is ensured to be in contact with a second end of the current-carrying conduit 201, and thus current is realized, high-voltage electricity can be uniformly distributed around the outdoor connecting terminal 1024 through the outdoor equalizing ring 1023, and no potential difference is ensured between annular parts of the outdoor equalizing ring 1023, so as to achieve a voltage equalizing effect. As shown in fig. 1, the second end of the outdoor insulator 1022 is provided with an outdoor connection flange connected with the middle flange 103 through a bolt in a sealing manner, and the outdoor connection flange is connected with the second end of the outdoor insulator 1022 through a pouring manner, and meanwhile, a sealing ring is arranged between the outdoor connection flange and the middle flange 103, so that the second end of the outdoor insulator 1022 is connected with the middle flange 103 in a sealing manner.
Further, as shown in fig. 2, in one embodiment, a spring device 1015 is disposed between the indoor terminal 1014 and the first end of the indoor insulator 1012, the spring device 1015 is sleeved outside the current-carrying conduit 201, and the spring device 1015 is located in the indoor insulator 1012. The spring device 1015 is in bolt sealing connection with the indoor terminal 1014 through the indoor flange 1016, the spring device 1015 is in bolt sealing connection with the first end of the indoor insulator 1012 through the indoor transition flange 1017, and the indoor grading ring 1013 is in bolt sealing connection with the indoor transition flange 1017. Specifically, the first end of the indoor insulator 1012 is connected with an indoor connection flange in a pouring manner, and a sealing ring is arranged between the indoor connection flange at the first end of the indoor insulator 1012 and the indoor transition flange 1017 so as to ensure the sealing connection between the first end of the indoor insulator 1012 and the indoor transition flange 1017. The indoor head structure 1011 and the outdoor head structure 1021 are respectively and tightly connected with the corresponding indoor insulator 1012 and the outdoor insulator 1022 by the compression spring device 1015 to apply the pretightening force to the indoor head structure 1011, thereby ensuring the reliable connection of the direct current bushing. Meanwhile, an indoor shielding ring 1018 is disposed on the outer side of the spring device 1015, and the indoor shielding ring 1018 is fixed on the inner side of the indoor transition flange 1017 by bolts, so that the electric field distribution at the first end of the current carrying conduit 201 is more uniform. In addition, in order to ensure the tightness of the connection between the indoor connection terminal 1014 and the indoor flange 1016, an indoor pressure cover 1019 is disposed between the indoor connection terminal 1014 and the indoor flange 1016, the indoor pressure cover 1019 is connected to the indoor flange 1016 by a bolt in a sealing manner, and the indoor pressure cover 1019 may be specifically disposed in a groove of the indoor flange 1016 and connected to the indoor flange 1016 by a sealing ring in a sealing manner.
As shown in fig. 3, the outdoor terminal 1024 is connected to the first end of the outdoor insulator 1022 through an outdoor flange 1025 assembly. Specifically, the outdoor flange 1025 assembly includes an outdoor flange 1025 in bolted sealing connection with the outdoor terminal 1024 and an outdoor transition flange 1026 in bolted sealing connection with the first end of the outdoor insulator 1022. Wherein, outdoor insulator 1022 first end is connected with outdoor flange through pouring mode, is provided with the sealing washer between outdoor flange and the outdoor transition flange 1026 of outdoor insulator 1022 first end to guarantee sealing connection between outdoor insulator 1022 first end and the outdoor transition flange 1026. The outdoor flange 1025 is in sealing connection with the outdoor transition flange 1026 through bolts, and an outdoor shielding ring 1027 is arranged on the outer side of the second end of the current carrying conduit 201, so that the electric field distribution of the second end of the current carrying conduit 201 is more uniform. And, outdoor shield ring 1027 is bolted to the inside of outdoor transition flange 1026 such that outdoor shield ring 1027 is located within outdoor insulator 1022 and outdoor grading ring 1023 is bolted to outdoor transition flange 1026. In addition, in order to guarantee the leakproofness that outdoor flange 1025 and outdoor transition flange 1026 are connected, be provided with outdoor gland 1028 between outdoor flange 1025 and outdoor transition flange 1026, outdoor gland 1028 passes through bolt sealing connection on outdoor transition flange 1026, and outdoor gland 1028 can specifically set up in the recess of outdoor transition flange 1026 to through sealing washer and outdoor transition flange 1026 sealing connection.
Further, as shown in fig. 5, in one embodiment, the intermediate flange 103 includes an intermediate transition flange 1031 and a connection sleeve 1032 coupled to the intermediate transition flange 1031, the first side of the intermediate transition flange 1031 is sealingly coupled to the indoor connection flange at the second end of the indoor insulator 1012 by bolts, and the connection sleeve 1032 is sealingly coupled to the outdoor connection flange at the second end of the outdoor insulator 1022 by bolts. Meanwhile, a clamping sleeve 1033 is connected to the second side of the intermediate transition flange 1031, the clamping sleeve 1033 is located at the inner side of the connecting sleeve 1032, and the clamping sleeve 1033 is in interference fit with the insulating core 202 to fix the current-carrying core tube 200, so that the current-carrying core tube 200 is prevented from shaking. A test tap arrangement 1034 is provided on the connection sleeve 1032 to allow the insulating core 202 to be grounded via the test tap arrangement 1034 to meet the grounding requirements of the insulating core 202.
In order to realize convection of the environment-friendly insulating gas 300 inside the sleeve body 100, the temperature balance inside the sleeve body 100 is ensured, a plurality of outdoor vent holes 1035 are formed in the connecting ends of the connecting sleeve 1032 and the outdoor insulators 1022, the inner cavities of the outdoor insulators 1022 and the cavity of the intermediate flange 103 are communicated through the outdoor vent holes 1035, and the outdoor vent holes 1035 are uniformly arranged at intervals along the circumferential direction of the connecting sleeve 1032. Specifically, the connection sleeve 1032 has a sleeve extension portion at a connection end connected to the outdoor insulator 1022 toward the inner side of the connection sleeve 1032, and the inner wall of the sleeve extension portion abuts against the insulating core 202, and the outdoor vent 1035 is a groove formed in the inner wall of the sleeve extension portion, so that the environment-friendly insulating gas 300 can flow into the cavity of the intermediate flange 103 through the groove formed in the inner wall of the sleeve extension portion, as shown in fig. 6. The inner wall of the intermediate transition flange 1031 is provided with a plurality of indoor vent holes 1036, the inner cavity of the indoor insulator 1012 and the cavity of the intermediate flange 103 can be communicated through the indoor vent holes 1036, and the indoor vent holes 1036 are uniformly distributed at intervals along the circumferential direction of the intermediate transition flange 1031. Specifically, the inner wall of the intermediate transition flange 1031 extends toward the inner side of the intermediate transition flange 1031 to form a flange extension portion, and the inner wall of the flange extension portion abuts against the insulating core 202, and the indoor ventilation holes 1036 are grooves formed in the inner wall of the flange extension portion, so that the environment-friendly insulating gas 300 can flow into the cavity of the intermediate flange 103 through the grooves formed in the inner wall of the flange extension portion, as shown in fig. 5. The outdoor vent 1035 and the indoor vent 1036 are mutually communicated through the cavity of the intermediate flange 103, so that the environment-friendly insulating gas 300 flows through the inner cavity of the outdoor insulator 1022 and the inner cavity of the indoor insulator 1012, and the temperature balance inside the sleeve body 100 can be quickly realized when the indoor and outdoor environment temperature difference of the direct-current sleeve is large, so that the reliable and stable operation of the direct-current sleeve is ensured.
The terms first and second and the like in the description and in the claims and in the above-described figures are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to the listed steps or elements but may include steps or elements not expressly listed.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A dc bushing, comprising:
the casing body (100), the casing body (100) comprises an indoor casing (101) and an outdoor casing (102), and the indoor casing (101) and the outdoor casing (102) are connected through an intermediate flange (103);
the current-carrying core tube (200) is arranged in the sleeve body (100), the current-carrying core tube (200) comprises a current-carrying guide tube (201) and an insulating core body (202) sleeved outside the current-carrying guide tube (201), environment-friendly insulating gas (300) is filled between the current-carrying core tube (200) and the sleeve body (100), and the environment-friendly insulating gas (300) is injected into the sleeve body (100) through a gas injection hole arranged in the middle flange (103).
2. The direct current bushing according to claim 1, characterized in that the indoor bushing (101) comprises an indoor header structure (1011) and an indoor insulator (1012) detachably connected to the indoor header structure (1011); the outdoor bushing (102) comprises an outdoor head structure (1021) and an outdoor insulator (1022) detachably connected to the outdoor head structure (1021); the indoor insulator (1012) and the outdoor insulator (1022) are detachably connected through the middle flange (103).
3. The dc bushing of claim 2, wherein the indoor header structure (1011) comprises an indoor grading ring (1013) disposed outside a first end of the indoor insulator (1012) and an indoor connection terminal (1014) located within the indoor grading ring (1013), the indoor connection terminal (1014) being connected to the first end of the current carrying conduit (201), a second end of the indoor insulator (1012) being bolted to the intermediate flange (103);
outdoor head structure (1021) including set up in outdoor equalizer ring (1023) in the first end outside of outdoor insulator (1022) and be located outdoor binding post (1024) in outdoor equalizer ring (1023), outdoor binding post (1024) with the second end of current-carrying pipe (201) is connected, the second end of outdoor insulator (1022) with intermediate flange (103) pass through bolted connection.
4. A dc bushing according to claim 3, characterized in that a spring means (1015) is arranged between the indoor connection terminal (1014) and the first end of the indoor insulator (1012), the spring means (1015) is sleeved outside the current carrying conduit (201), the spring means (1015) is located in the indoor insulator (1012), the spring means (1015) and the indoor connection terminal (1014) are bolted by an indoor flange (1016), the spring means (1015) and the first end of the indoor insulator (1012) are bolted by an indoor transition flange (1017), and the indoor equalizing ring (1013) is bolted to the indoor transition flange (1017); the outdoor wiring terminal (1024) is connected with the first end of the outdoor insulator (1022) through an outdoor flange (1025) component.
5. The direct current bushing of claim 4, wherein the outdoor flange (1025) assembly comprises an outdoor flange (1025) bolted to the outdoor connection terminal (1024) and an outdoor transition flange (1026) bolted to a first end of the outdoor insulator (1022), the outdoor flange (1025) being bolted to the outdoor transition flange (1026), an outdoor shield ring (1027) being provided outside a second end of the current carrying conduit (201), the outdoor shield ring (1027) being secured inside the outdoor transition flange (1026) such that the outdoor shield ring (1027) is located within the outdoor insulator (1022), the outdoor equalizing ring (1023) being bolted to the outdoor transition flange (1026); an indoor shielding ring (1018) is arranged outside the spring device (1015), and the indoor shielding ring (1018) is fixed on the inner side of the indoor transition flange (1017).
6. The direct current bushing according to claim 5, characterized in that an indoor gland (1019) is arranged between the indoor wiring terminal (1014) and the indoor flange (1016), the indoor gland (1019) is connected to the indoor flange (1016) in a sealing manner, the indoor wiring terminal (1014) and the first end of the current carrying conduit (201) are in interference fit through an indoor current carrying watchband (1020), and an indoor clamping groove for fixing the indoor current carrying watchband (1020) is arranged on the inner wall of the indoor wiring terminal (1014);
an outdoor gland (1028) is arranged between the outdoor flange (1025) and the outdoor transition flange (1026), the outdoor gland (1028) is connected to the outdoor transition flange (1026) in a sealing mode, and the outdoor wiring terminal (1024) and the second end of the current carrying conduit (201) are in interference fit through an outdoor current carrying watchband (1029), and an outdoor clamping groove for fixing the outdoor current carrying watchband (1029) is formed in the inner wall of the outdoor wiring terminal (1024).
7. The direct current bushing according to claim 5, characterized in that the intermediate flange (103) comprises an intermediate transition flange (1031) and a connection sleeve (1032) connected to the intermediate transition flange (1031), a first side of the intermediate transition flange (1031) being bolted to the second end of the indoor insulator (1012), the connection sleeve (1032) being bolted to the second end of the outdoor insulator (1022);
a clamping sleeve (1033) is connected to the second side of the intermediate transition flange (1031), the clamping sleeve (1033) is located on the inner side of the connecting sleeve (1032), and the clamping sleeve (1033) is in interference fit with the insulating core body (202);
a test tap device (1034) is arranged on the connecting sleeve (1032) so that the insulating core (202) is grounded through the test tap device (1034).
8. The direct current bushing according to claim 7, wherein a plurality of outdoor vent holes (1035) are formed in the connecting end of the connecting sleeve (1032) and the outdoor insulator (1022), the outdoor vent holes (1035) are used for communicating the inner cavity of the outdoor insulator (1022) with the cavity of the intermediate flange (103), and the outdoor vent holes (1035) are uniformly arranged at intervals along the circumferential direction of the connecting sleeve (1032); a plurality of indoor vent holes (1036) are formed in the inner wall of the intermediate transition flange (1031), the indoor vent holes (1036) are used for communicating the inner cavity of the indoor insulator (1012) with the cavity of the intermediate flange (103), and the indoor vent holes (1036) are uniformly arranged at intervals along the circumferential direction of the intermediate transition flange (1031); the outdoor vent hole (1035) and the indoor vent hole (1036) are communicated with each other through the cavity of the middle flange (103), so that the environment-friendly insulating gas (300) is communicated with the inner cavity of the outdoor insulator (1022) and the inner cavity of the indoor insulator (1012).
9. The dc bushing according to claim 1, characterized in that the insulating core (202) comprises a coiled tube (2021) and an epoxy core (2022) sleeved outside the coiled tube (2021), the epoxy core (2022) is connected with the coiled tube (2021) by casting, and the epoxy core (2022) is a fusiform cylinder to increase the rigidity of the insulating core (202).
10. The direct current bushing according to any of claims 1-9, characterized in that the environmentally friendly insulating gas (300) is nitrogen or air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311648012.0A CN117594343A (en) | 2023-12-04 | 2023-12-04 | DC sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311648012.0A CN117594343A (en) | 2023-12-04 | 2023-12-04 | DC sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117594343A true CN117594343A (en) | 2024-02-23 |
Family
ID=89916533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311648012.0A Pending CN117594343A (en) | 2023-12-04 | 2023-12-04 | DC sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117594343A (en) |
-
2023
- 2023-12-04 CN CN202311648012.0A patent/CN117594343A/en active Pending
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