CN110212478B - Pipeline bus and bus unit of pipeline bus - Google Patents
Pipeline bus and bus unit of pipeline bus Download PDFInfo
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- CN110212478B CN110212478B CN201910395444.2A CN201910395444A CN110212478B CN 110212478 B CN110212478 B CN 110212478B CN 201910395444 A CN201910395444 A CN 201910395444A CN 110212478 B CN110212478 B CN 110212478B
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- 239000012212 insulator Substances 0.000 claims abstract description 206
- 238000012423 maintenance Methods 0.000 claims abstract description 31
- 238000007789 sealing Methods 0.000 claims description 8
- 239000004020 conductor Substances 0.000 description 35
- 230000009286 beneficial effect Effects 0.000 description 14
- 238000003780 insertion Methods 0.000 description 14
- 230000037431 insertion Effects 0.000 description 14
- 230000005540 biological transmission Effects 0.000 description 7
- 239000003822 epoxy resin Substances 0.000 description 7
- 229920000647 polyepoxide Polymers 0.000 description 7
- 239000002184 metal Substances 0.000 description 5
- 230000008602 contraction Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000005684 electric field Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G5/00—Installations of bus-bars
- H02G5/06—Totally-enclosed installations, e.g. in metal casings
- H02G5/063—Totally-enclosed installations, e.g. in metal casings filled with oil or gas
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- Installation Of Bus-Bars (AREA)
Abstract
The invention relates to a pipeline bus and a bus unit of the pipeline bus. The bus unit of the pipeline bus comprises a cylinder, a conducting rod and insulators, wherein the insulators are divided into a fixed supporting insulator and a movable supporting insulator; the fixed support insulator is provided with a conductive insert, one side of the conductive insert is provided with a fixed structure, and the other side of the conductive insert is provided with an inserting structure; a conductive rod through hole is formed in the movable supporting insulator, the whole length of the conductive rod is smaller than that of the barrel, a detachable section is arranged at one end, close to the fixed supporting insulator, of the conductive rod, and one end, far away from the fixed supporting insulator, of the conductive rod extends out of the bus unit; the length of the detachable section is larger than the inserting matching length of the conductive rod and the conductive insert. The detachable section can be detached from the whole pipeline bus, and one section of the bus unit can be detached from the whole pipeline bus. The disassembly is more convenient, the disassembly efficiency is greatly improved, and the maintenance cost is correspondingly reduced.
Description
Technical Field
The invention relates to a pipeline bus and a bus unit of the pipeline bus.
Background
The gas insulated metal enclosed transmission line (GIL) has large transmission energy, small electric energy loss and high reliability, is widely applied to alternating current transmission under special conditions, and becomes a preferred scheme for replacing an overhead transmission line. The GIL generally requires long-term operation and high safety, and for the high-voltage GIL, if an insulating part of the GIL fails, regional power failure may be caused, and a significant economic loss is caused, so that the reliability of the high-voltage GIL is required to be higher, and a special insulating part must be adopted.
At present, an insulating part for a high-voltage GIL mainly comprises a basin-type insulator and a three-pillar insulator, wherein the basin-type insulator can only be used for supporting a high-voltage conductor and cannot realize sliding support, namely the basin-type insulator cannot meet the requirement of length change of the high-voltage conductor on installation due to expansion caused by heat and contraction caused by cold; the thin-wall metal inserts (namely the conductive inserts) are arranged at the ends, close to each other, of the pillars of the three-pillar insulator, although sliding support can be achieved, the three-pillar insulator is complex in structure and high in pouring difficulty, particularly the thin-wall metal inserts are poor in bonding effect with epoxy resin, the rate of failure of a resin metal interface is high, and potential safety hazards are buried in high-voltage GIL operation. In addition, the thin-wall insert needs to be connected with the conductive tube, the current connection mode mainly comprises press mounting and welding mounting, and no matter which mode is adopted, the thin-wall central insert can deform under stress, and meanwhile, the stress change of epoxy resin is caused, so that the bonding surface is degraded, and the service life of the insulator is shortened. There is also the GIL that adopts single-post insulator among the prior art, like the chinese utility model patent of the publication number CN204441840U, a GIL structure is disclosed, including conductor (being conducting rod), shell, supporting insulator one end is fixed on the shell, and the other end is opened there is the through-hole for support follows the conductor that penetrates in the through-hole. The GIL adopts the structure of a single-post insulator, so that the structure of the traditional post insulator is simplified, but when the GIL is used, a conductor penetrates through a through hole on the single-post supporting insulator, and two ends of the conductor usually extend into two adjacent bus units respectively.
In view of the great significance of GIL equipment in the power grid, the problems in installation, maintenance and repair should be paid more attention, because GIL equipment is power transmission equipment with a closed shell and the laying line is generally long, the GIL bus section in the GIL equipment generally comprises a plurality of bus units, each bus unit is provided with a shell and a conducting rod (also called a central conductor) supported in the shell through an insulator, if a certain bus unit fails in operation, the bus unit is required to be detached from one bus unit to another from one end of the whole GIL bus section until the failed bus unit is detached and replaced, and the detachment efficiency of the detachment mode is very low. In the prior art, a fault bus unit is detached by arranging a detachable bus unit between two adjacent bus units, such as a detachable bus unit and a rigid gas insulated transmission line disclosed in the chinese patent application with application publication No. CN104538916A, but the detachable bus unit has a complex structure, many parts and inconvenient detachment, and more detachable bus units need to be arranged when a line is laid, so that the maintenance cost is greatly increased.
Disclosure of Invention
The invention aims to provide a pipeline bus, which aims to solve the technical problem that in the prior art, when a bus unit in the pipeline bus of a gas insulated metal enclosed transmission line fails, the bus unit is inconvenient to maintain; the invention also aims to provide a bus unit of the pipeline bus, so as to solve the technical problem that the bus unit in the prior art is inconvenient to maintain.
In order to achieve the purpose, the technical scheme of the bus unit of the pipeline bus is as follows: the bus unit of the pipeline bus comprises a cylinder body, a conducting rod arranged in the cylinder body and an insulator used for supporting the conducting rod in the cylinder body,
the insulator is a single-post insulator and is divided into a fixed supporting insulator and a movable supporting insulator; the fixed support insulator is provided with a conductive insert, one side of the conductive insert is provided with a fixed structure for fixing the conductive rod in the bus unit, and the other side of the conductive insert is provided with an inserting structure for inserting and matching the conductive rod in the adjacent bus unit;
the movable supporting insulator is provided with a conducting rod through hole for the conducting rod to axially and movably pass through along the bus unit so as to realize radial support of the conducting rod;
the whole length of the conductive rod is smaller than that of the barrel, the conductive rod comprises a conductive rod body and a detachable section, the detachable section is arranged at one end, close to the fixed supporting insulator, of the conductive rod, and one end, far away from the fixed supporting insulator, of the conductive rod extends out of the bus unit; two ends of the detachable section are detachably fixed with the conductive rod body and the conductive insert respectively so as to realize radial detachment along the cylinder body; the length of the detachable section is greater than the inserting fit length of the conductive rod and the conductive insert;
the single-post insulator is detachably fixed on the barrel, a maintenance port is formed in the barrel, a detachable sealing cover is arranged at the maintenance port, and a tool is inserted into the barrel through the maintenance port to detach the detachable section;
the barrel is internally provided with an avoidance space in the radial direction of the barrel, and the avoidance space is used for the conducting rod to axially enter along the bus unit so as to be integrally positioned in the barrel of the bus unit.
The bus unit of the pipeline bus has the beneficial effects that: one side of the conductive insert in the fixed support insulator is used for fixing the detachable section of the conductive rod in the bus unit, so that the conductive rod can be fixed in the cylinder, the other side of the conductive insert is provided with a plug-in structure for plug-in connection of the conductive rod in the adjacent bus unit, the length of the detachable section is greater than that of the conductive rod and the plug-in matching length of the conductive insert, the detachable section is detached from the conductive rod and the fixed support insulator, the fixed support insulator can be separated from the conductive rod and moved away, an axial movable space is provided for the conductive rod, the conductive rod is pulled out from the plug-in structure on the fixed support insulator in the adjacent bus unit, and the conductive rod and the movable support insulator are integrally located in the bus unit and do not extend to the outside of the bus unit by utilizing the avoiding space. And disassembling two adjacent sections of bus units according to the steps to change the state that the conducting rod of the two sections of bus units extends into the other bus unit into the state that the conducting rod is integrally positioned in the bus unit corresponding to the conducting rod. One of the two bus units is not affected by the conductive rods of the other bus units, and the bus unit can be detached from the whole pipeline bus. The disassembly is not needed to be started from one end of the whole bus or realized by disassembling the detachable bus unit like the prior art, the disassembly is more convenient, the disassembly efficiency is greatly improved, and the maintenance cost is correspondingly reduced.
Furthermore, the inserting structure is provided with an inserting section used for being in conductive inserting matching with the conducting rods in the adjacent bus units, and an accommodating section used for accommodating the inserting ends of the conducting rods in the adjacent bus units along the inserting direction, wherein the axial size of the accommodating section is larger than or equal to that of the inserting section.
The axial avoiding space has the advantages that when the fixed support insulator is disassembled, the axial avoiding space is larger, and the disassembly can be more convenient.
Furthermore, the two axial ends of the detachable section are provided with connecting flanges, and the detachable fixing is realized through the connecting flanges and corresponding bolts.
The conductive rod has the beneficial effects that the conductive rod can be conveniently detached by adopting the scheme.
Furthermore, two contact fingers are arranged between the conductive insert on the fixed support insulator and the conductive rod, the two contact fingers are arranged at intervals along the axial direction of the cylinder body, and a guide ring for guiding the conductive rod is arranged between the two contact fingers.
The conductive rod has the beneficial effects that the contact fingers are mainly used for bearing rated current of a pipeline bus, the guide rings play a role in guiding the conductive rod when the conductive rod moves, and the guide rings are arranged between the two contact fingers to increase the angle of the insertion end of the conductive rod, which can deflect in the axial direction.
Furthermore, the movable supporting insulator comprises a conductive insert, at least two guide rings are arranged between the inner wall of the conductive insert on the movable supporting insulator and the conductive rod, and a contact finger for enabling the conductive rod and the conductive insert on the movable supporting insulator to have the same potential is arranged between the two guide rings.
The movable support insulator has the beneficial effects that the movable function of the movable support insulator can be realized through the contact finger, namely, when the length of the conducting rod is changed due to expansion caused by heat and contraction caused by cold or other deformation, the conducting rod overcomes the friction force of the contact finger and slides along the axial direction; in addition, the contact finger is also used for enabling the conducting rod to be equipotential with the conducting insert on the movable supporting insulator.
Furthermore, a maintenance port at the fixed supporting insulator and/or a maintenance port at the movable supporting insulator are/is an insulator take-out port, and the insulator take-out port corresponds to the single-post insulator along the radial direction of the cylinder body and is used for taking out the fixed supporting insulator or the movable supporting insulator at the corresponding position from the cylinder body.
The bus bar unit has the beneficial effects that the fixed supporting insulator and the movable supporting insulator can be taken out from the insulator taking-out position, so that the insulator and the conductive rod are conveniently dismounted, and the bus bar unit is more convenient to the condition that only the insulator needs to be taken out and the bus bar unit does not need to be dismounted.
The bus unit has the beneficial effects that the fixed supporting insulator is arranged at one end of the bus unit, and the movable supporting insulator is arranged in the middle of the bus unit.
The pipeline bus has the beneficial effects that firm support between the two insulators can be ensured by adopting the scheme, the two insulators are convenient to center, the using quantity of the insulators is saved, and the overall economy of the pipeline bus is ensured.
The technical scheme of the pipeline bus is as follows: the pipeline bus comprises bus units which are sequentially butted, the bus units of the pipeline bus comprise a cylinder body, a conducting rod arranged in the cylinder body and an insulator used for supporting the conducting rod in the cylinder body,
the insulator is a single-post insulator and is divided into a fixed supporting insulator and a movable supporting insulator; the fixed support insulator is provided with a conductive insert, one side of the conductive insert is provided with a fixed structure for fixing the conductive rod in the bus unit, and the other side of the conductive insert is provided with an inserting structure for inserting and matching the conductive rod in the adjacent bus unit;
the movable supporting insulator is provided with a conducting rod through hole for the conducting rod to axially and movably pass through along the bus unit so as to realize radial support of the conducting rod;
the whole length of the conductive rod is smaller than that of the barrel, a detachable section is arranged at one end, close to the fixed supporting insulator, of the conductive rod, and one end, far away from the fixed supporting insulator, of the conductive rod extends out of the bus unit; two ends of the detachable section are detachably fixed with the rest part of the conductive rod and the conductive insert respectively so as to realize the radial detachment along the cylinder body; the length of the detachable section is greater than the inserting fit length of the conductive rod and the conductive insert;
the single-post insulator is detachably fixed on the barrel, a maintenance port is formed in the barrel, a detachable sealing cover is arranged at the maintenance port, and a tool is inserted into the barrel through the maintenance port to detach the detachable section;
the barrel is internally provided with an avoidance space in the radial direction of the barrel, and the avoidance space is used for the conducting rod to axially enter along the bus unit so as to be integrally positioned in the barrel of the bus unit.
The pipeline bus has the beneficial effects that: one side of the conductive insert in the fixed support insulator is used for fixing the detachable section of the conductive rod in the bus unit, so that the conductive rod can be fixed in the cylinder, the other side of the conductive insert is provided with a plug-in structure for plug-in connection of the conductive rod in the adjacent bus unit, the length of the detachable section is greater than that of the conductive rod and the plug-in matching length of the conductive insert, the detachable section is detached from the conductive rod and the fixed support insulator, the fixed support insulator can be separated from the conductive rod and moved away, an axial movable space is provided for the conductive rod, the conductive rod is pulled out from the plug-in structure on the fixed support insulator in the adjacent bus unit, and the conductive rod and the movable support insulator are integrally located in the bus unit and do not extend to the outside of the bus unit by utilizing the avoiding space. And disassembling two adjacent sections of bus units according to the steps to change the state that the conducting rod of the two sections of bus units extends into the other bus unit into the state that the conducting rod is integrally positioned in the bus unit corresponding to the conducting rod. One of the two bus units is not affected by the conductive rods of the other bus units, and the bus unit can be detached from the whole pipeline bus. The disassembly is not needed to be started from one end of the whole bus or realized by disassembling the detachable bus unit like the prior art, the disassembly is more convenient, the disassembly efficiency is greatly improved, and the maintenance cost is correspondingly reduced.
Furthermore, the inserting structure is provided with an inserting section used for being in conductive inserting matching with the conducting rods in the adjacent bus units, and an accommodating section used for accommodating the inserting ends of the conducting rods in the adjacent bus units along the inserting direction, wherein the axial size of the accommodating section is larger than or equal to that of the inserting section.
The axial avoiding space has the advantages that when the fixed support insulator is disassembled, the axial avoiding space is larger, and the disassembly can be more convenient.
Furthermore, the two axial ends of the detachable section are provided with connecting flanges, and the detachable fixing is realized through the connecting flanges and corresponding bolts.
The conductive rod has the beneficial effects that the conductive rod can be conveniently detached by adopting the scheme.
Furthermore, two contact fingers are arranged between the conductive insert on the fixed support insulator and the conductive rod, the two contact fingers are arranged at intervals along the axial direction of the cylinder body, and a guide ring for guiding the conductive rod is arranged between the two contact fingers.
The conductive rod has the beneficial effects that the contact fingers are mainly used for bearing rated current of a pipeline bus, the guide rings play a role in guiding the conductive rod when the conductive rod moves, and the guide rings are arranged between the two contact fingers to increase the angle of the insertion end of the conductive rod, which can deflect in the axial direction.
Furthermore, the movable supporting insulator comprises a conductive insert, at least two guide rings are arranged between the inner wall of the conductive insert on the movable supporting insulator and the conductive rod, and a contact finger for enabling the conductive rod and the conductive insert on the movable supporting insulator to have the same potential is arranged between the two guide rings.
The movable support insulator has the beneficial effects that the movable function of the movable support insulator can be realized through the contact finger, namely, when the length of the conducting rod is changed due to expansion caused by heat and contraction caused by cold or other deformation, the conducting rod overcomes the friction force of the contact finger and slides along the axial direction; in addition, the contact finger is also used for enabling the conducting rod to be equipotential with the conducting insert on the movable supporting insulator.
Furthermore, a maintenance port at the fixed supporting insulator and/or a maintenance port at the movable supporting insulator are/is an insulator take-out port, and the insulator take-out port corresponds to the single-post insulator along the radial direction of the cylinder body and is used for taking out the fixed supporting insulator or the movable supporting insulator at the corresponding position from the cylinder body.
The bus bar unit has the beneficial effects that the fixed supporting insulator and the movable supporting insulator can be taken out from the insulator taking-out position, so that the insulator and the conductive rod are conveniently dismounted, and the bus bar unit is more convenient to the condition that only the insulator needs to be taken out and the bus bar unit does not need to be dismounted.
The bus unit has the beneficial effects that the fixed supporting insulator is arranged at one end of the bus unit, and the movable supporting insulator is arranged in the middle of the bus unit.
The pipeline bus has the beneficial effects that firm support between the two insulators can be ensured by adopting the scheme, the two insulators are convenient to center, the using quantity of the insulators is saved, and the overall economy of the pipeline bus is ensured.
Drawings
FIG. 1 is a schematic structural diagram of a bus bar unit of a pipeline bus bar provided by the invention;
fig. 2 is a schematic structural view of a fixed support insulator of a bus bar unit of a pipeline bus bar provided by the present invention;
FIG. 3 is a schematic view of the structure of the movable support insulator of the bus bar unit of the pipeline bus bar provided by the present invention;
fig. 4 is a schematic structural diagram of a pipeline bus bar provided by the present invention (only three of which are shown).
In the figure: 1-bus bar unit, 2-fixed supporting insulator, 3-movable supporting insulator, 4-conducting rod, 41-conducting rod body, 42-detachable section, 5-first central conductor, 6-second central conductor, 7-cylinder, 8-screw, 9-maintenance port, 10-supporting bent plate, 11-cylinder, 12-shielding cover, 13-sealing cover, 14-epoxy resin, 15-contact finger, 16-first guide ring, 17-insert, 18-plug hole, 19-plug end, 20-fixed end, 21-first bus bar unit, 22-second bus bar unit, 23-third bus bar unit and 24-second guide ring.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1, 2 and 3, the bus bar unit 1 includes a cylindrical body 7, a conductive rod 4 disposed in the cylindrical body 7, and an insulator for supporting the conductive rod 4 in the cylindrical body 7. The insulator includes fixed stay insulator 2 and activity support insulator 3, and both are single-column insulator, have a landing leg promptly, the bottom of insulator for be used for with the fixed stiff end of barrel, the top for be used for with the conducting rod cooperation end of conducting rod adaptation. The conducting rod 4 comprises a conducting rod body 41 and a detachable section 42, the extending direction of the axis of the cylinder body is the left-right direction, the fixed supporting insulator is arranged on the left side of the movable supporting insulator, the right end of the conducting rod body 41 along the extending direction is the inserting end 19, and the left end is the fixed end 20.
The fixed supporting insulator 2 and the movable supporting insulator 3 are both molded by casting epoxy resin 14, and the lower ends of the fixed supporting insulator and the movable supporting insulator are both provided with inserts 17. The fixed supporting insulator 2 is arranged at the left end of the whole bus unit 1, and the movable supporting insulator 3 is arranged in the middle of the whole bus unit 1. The fixed support insulator 2 comprises an insulating main body which is formed by pouring epoxy resin 14 and a first central conductor 5 which is arranged in the insulating main body and extends along the axial direction of the conducting rod 4, the first central conductor 5 is a conducting insert on the fixed support insulator 2 and is in conducting connection with the conducting rod 4, the thickness of the conducting insert exceeds 10mm, the fixed support insulator is convenient to manufacture, and when the fixed support insulator is connected with the conducting rod 4, the process of press fitting or welding is omitted, and the bonding effect of the first central conductor 5 and the epoxy resin cannot be influenced. Detachable section 42 all is equipped with flange along axial both ends, all correspond on first center conductor 5 with stiff end 20 and be equipped with fixed knot structure, specifically, fixed knot structure is respectively for setting up at the screw hole of 5 tip of first center conductor and setting up the screw hole at stiff end 20, be located the left flange of detachable section 42 and pass through screw 8 to be fixed on the right side of first center conductor 5, the flange that is located detachable section 42 right side passes through screw 8 to be fixed in the left side of conducting rod body 41, the installation and the dismantlement of detachable section 42 have been made things convenient for. The left side of the first central conductor 5 is provided with a plug structure for plug-in matching with the plug end 19 of the conducting rod in the adjacent left bus bar unit, and the plug structure is a plug hole 18 arranged on the first central conductor 5 along the axial direction of the conducting rod 4 in the embodiment. The plug hole 18 has a plug section for electrically conducting and plugging the conductive rod 4 and a containing section for containing the conductive rod 4 along the plugging direction, the diameter of the containing section is larger than that of the plug section, and the axial size of the containing section is equal to that of the plug section, so that the axial size of the plug hole 18 is equal to twice the actual insertion depth of the conductive rod 4 in the adjacent bus unit, namely, after the plug end 19 of the conductive rod 4 and the plug hole 18 realize plugging and conduction, a certain stroke of axial movement along the plug hole 18 still exists. The large avoiding space is provided when the fixed support insulator 2 is detached, and the fixed support insulator 2 is convenient to detach. Of course, in other embodiments, the axial dimension of the receiving section can also be greater than the axial dimension of the plug section, i.e. the plug-in depth of the conductor rod is increased. In other embodiments, the axial dimension of the receiving section may be smaller than the axial dimension of the plug section, or the plug structure may not have a receiving section.
Two contact fingers 15 are arranged between the first central conductor 5 and the insertion end 19 of the conducting rod 4, the contact fingers 15 in the embodiment are spring contact fingers and are mainly used for bearing rated current of the tube body bus, of course, in other embodiments, contact fingers of different materials, cross-sectional areas and numbers can be selected according to the rated current of the tube body bus, for example, watchband contact fingers or annular contact fingers in other forms are adopted, and the number of the contact fingers can be one or more than two; in other embodiments, the contact fingers may be disposed on the conductive rod 4.
A first guide ring 16 for guiding the insertion end 19 of the conducting rod 4 when moving in the insertion hole 18 is arranged between the two contact fingers 15, and the first guide ring 16 is arranged to increase the angle of the insertion end 19 of the conducting rod 4 which can deflect in the axial direction, in this embodiment, the maximum axial deflection angle of the insertion end 19 of the conducting rod can reach 2.5 °.
The fixed support insulator 2 is fixed with a shielding case 12 at one side of the contact finger 15 through a screw, and the shielding case 12 can greatly reduce the electric field intensity near the fixed support insulator. In order to achieve a more optimal electric field, the length of R in fig. 2 is greater than or equal to 50 mm. In order to ensure the mechanical strength of the fixed supporting insulator 2, the dimension H in fig. 2 is greater than or equal to 7 mm.
The movable supporting insulator 3 is provided with a second central conductor 6 which is coaxial with the first central conductor 5 and is in conductive connection with the conductive rod 4, the second central conductor 6 is a conductive insert on the movable supporting insulator 3, the thickness of the conductive insert is also more than 10mm, the manufacture is convenient, and when the movable supporting insulator is connected with the conductive rod 4, the process of press fitting or welding is omitted, and the bonding effect of the second central conductor 6 and epoxy resin cannot be influenced. A contact finger is arranged between the second central conductor 6 and the conducting rod 4, and is arranged on one side of the movable supporting insulator 3 without being arranged in the center of the movable supporting insulator 3 in order to facilitate the processing of a contact finger groove. The contact finger is made of the same material as the contact finger 15, and is a spring contact finger, but the sectional area of the contact finger is larger than that of the contact finger 15, and the spring contact finger is mainly used for realizing the moving function of the movable supporting insulator 3 and realizing the equipotential between the conductive rod 4 and the second central conductor 6. When the length of the conducting rod 4 changes due to thermal expansion and cold contraction or other deformation, the conducting rod 4 overcomes the friction force of the contact finger to move axially, that is, the conducting rod 4 can move relative to the second central conductor 6.
The movable supporting insulator 3 is provided with second guide rings 24 on both sides between the conductive rod 4 and the second central conductor 6, respectively, for guiding the conductive rod 4 when it moves relative to the second central conductor 6.
The movable supporting insulator 3 is fixed with shielding covers at two sides of the second central conductor 6 through screws, so that the electric field intensity near the movable supporting insulator is reduced, metal particles generated by friction of the contact fingers can be effectively collected, and the reliability is enhanced. In order to facilitate the disassembly and assembly of the shielding cover, the wall of the shielding cover is provided with a slot or a hole corresponding to the head of the screw along the axial direction of the screw, so that a corresponding operating tool can pass through the slot or the hole to disassemble and assemble the screw. The size of the shield case is larger than the size of the shield case 12. In order to obtain a more optimal electric field, the length of R1 in fig. 3 is greater than or equal to 50mm, and in order to guarantee the mechanical strength of the mobile support insulator 3, the dimension of H1 in fig. 3 is greater than or equal to 7 mm.
In this embodiment, the barrel 7 has a maintenance opening 9 below the fixed support insulator 2 and the movable support insulator 3, and in other embodiments, the maintenance opening and the single-post insulator may be arranged in a staggered manner. An operation opening used for disassembling the movable supporting insulator 3 is also arranged on the cylinder body 7, and the operation opening is a flange opening arranged on the cylinder body 7. In this embodiment, the maintenance port is an insulator removal port through which the fixed support insulator 2 and the movable support insulator 3 can be removed. Of course, in other embodiments, a hand hole may be provided near the movable support insulator for removing the fixed support insulator and the movable support insulator. The bottom of the cylinder 7 is connected with a supporting cylinder 11 corresponding to each maintenance opening 9, the lower ends of the fixed supporting insulator 2 and the movable supporting insulator 3 are fixed with supporting bent plates 10 which respectively support the two insulators through screws, the supporting bent plates 10 are of a revolving body structure, have flange edges and are fastened on the supporting cylinder 11 through screws penetrating through the flange edges. The lower part of the supporting cylinder body 11 is connected with a sealing cover 13 for sealing the lower part of the maintenance opening through long bolts, namely the supporting bent plate 10, the fixed supporting insulator 2 and the movable supporting insulator 3, the supporting bent plate 10 and the supporting cylinder body 11 and the sealing cover 13 are detachably connected.
The specific embodiment of the pipeline bus provided by the invention is suitable for both the GIL bus and the GIS bus, and comprises a plurality of bus units which are sequentially butted, wherein in the embodiment, the structure of the pipeline bus is described by taking three bus units which are sequentially butted as an example. The pipeline bus comprises a first bus unit 21, a second bus unit 22, and a third bus unit 23 in fig. 4, and further comprises a bus unit (not shown in the figure) adjacent to the first bus unit and the third bus unit, and the structures of the first bus unit 21, the second bus unit 22, and the third bus unit 23 are the same as those of the bus units in the above embodiments, and are not described again.
When a certain bus unit of the pipeline bus fails, if the fixed supporting insulator 2 fails, the fixed supporting insulator 2 needs to be disassembled, taking the second bus unit 22 as an example, the cover and the supporting bent plate at the maintenance opening below the fixed supporting insulator 2 of the second bus unit 22 are firstly disassembled, then the shielding cover of the fixed supporting insulator 2 in the second bus unit 22 is disassembled, and further the screw 8 between the detachable section 42 in the second bus unit 22 and the end part of the fixed supporting insulator 2 in the second bus unit 22 is disassembled; the screw 8 between the detachable section 42 and the conductor bar body 41, and then the detachable section 42 is removed, and at this time, the fixed support insulator 2 can be directly moved axially to the right to be separated from the conductor bar in the first busbar unit 21, and then the fixed support insulator 2 in the second busbar unit 22 can be directly taken out from the maintenance opening.
If the sliding single-post insulator in the second bus unit 22 fails, the sliding single-post insulator needs to be disassembled, the disassembling process is to move the conductive rod in the second bus unit 22 to the left on the basis of the disassembling of the fixed support insulator, so that the conductive rod is pulled out from the plugging structure of the fixed support insulator in the third bus unit 23, the movable support insulator slides out from the plugging end of the conductive rod by using the radial avoiding space between the cylinder and the conductive rod, then the shielding cover connected to the sliding single-post insulator is disassembled, and finally the conductive rod in the second bus unit 22 is taken out from the maintenance opening below the sliding single-post insulator, at this time, the whole conductive rod in the second bus unit 22 is located in the cylinder of the second bus unit 22.
If the second bus bar unit 22 fails and the barrel needs to be removed due to other reasons, the conductive rod in the first bus bar unit 21 needs to be entirely placed in the barrel of the first bus bar unit 21, and the step is to disassemble the sliding single-post insulator in the first bus bar unit 21 according to the step of disassembling the sliding single-post insulator in the second bus bar unit 22, and finally to place the conductive rod in the first bus bar unit 21 entirely in the barrel of the first bus bar unit 21. At this time, the conductive rod in the second bus bar unit 22 is entirely located in the cylinder of the second bus bar unit 22, so that the second bus bar unit 22 can be radially separated from the first and third bus bar units by directly disassembling the connecting flange between the second bus bar unit 22 and the first bus bar unit 21 and the connecting flange between the second bus bar unit 22 and the third bus bar unit 23, and the second bus bar unit 22 can be entirely removed. In other embodiments, the fixing support insulator may not be removed when the second bus bar unit is removed as a whole, and the maintenance opening is only used for maintenance.
In the embodiment of the bus unit of the pipeline bus and the pipeline bus, the fixing structure is a threaded hole formed in the end face of the fixed support insulator, and in other embodiments, the fixing structure can also adopt a set screw to directly fixedly connect the left end of the detachable section with the right end of the fixed support insulator.
In the embodiment of the above pipeline bus and the bus unit of the pipeline bus, the fixed support insulator has the insertion structure for being inserted and matched with the conductive rod, and in other embodiments, the insertion structure may also be disposed on the conductive rod, that is, the conductive rod has the insertion hole, and the fixed support insulator has the insertion end, and at this time, the insertion end on the first central conductor in the fixed support insulator is matched with the insertion hole of the conductive rod to realize conductive connection.
In the above embodiments of the bus unit of the pipeline bus and the pipeline bus, the fixed support insulator and the movable support insulator are fixed on the support cylinder through the support bent plate, and the support cylinder is connected with the sealing cover.
In the embodiment of the bus unit of the pipeline bus and the pipeline bus, the right end of the conducting rod penetrates through the movable supporting insulator, and the left end of the conducting rod is fixed on the fixed supporting insulator, namely, the two insulators support the conducting rod in a bearing manner; in other embodiments, the support of the conductive rod by the two insulators can also be a hanging support.
In the above embodiments of the bus unit of the pipeline bus and the pipeline bus, one side of the fixed support insulator is provided with the shielding cover, and two sides of the movable support insulator are provided with the shielding cover.
In the above-mentioned embodiment of the bus unit of pipeline bus and pipeline bus, the left end of removable section and the right-hand member butt joint of first central conductor, the right-hand member of removable section and the left end butt joint of conducting rod body, removable section through set up the flange realization at axial both ends with the radial removable fixed of conducting rod body and first central conductor. In other embodiments, the conductive rod body and the first central conductor are respectively provided with a clamping groove, two axial ends of the detachable section are respectively placed into the clamping grooves along the radial direction, and the detachable section is detachably fixed by fastening screws which are arranged at the positions of the clamping grooves corresponding to the detachable section along the radial direction.
Claims (8)
1. The bus unit of pipeline bus includes barrel, the conducting rod of setting in the barrel and is used for supporting the insulator of conducting rod in the barrel, its characterized in that: the insulator is a single-post insulator and is divided into a fixed supporting insulator and a movable supporting insulator; the fixed support insulator is provided with a conductive insert, one side of the conductive insert is provided with a fixed structure for fixing the conductive rod in the bus unit, and the other side of the conductive insert is provided with an inserting structure for inserting and matching the conductive rod in the adjacent bus unit; the movable supporting insulator is provided with a conducting rod through hole for the conducting rod to axially and movably pass through along the bus unit so as to realize radial support of the conducting rod; the whole length of the conductive rod is smaller than that of the barrel, the conductive rod comprises a conductive rod body and a detachable section, the detachable section is arranged at one end, close to the fixed supporting insulator, of the conductive rod, and one end, far away from the fixed supporting insulator, of the conductive rod extends out of the bus unit; two ends of the detachable section are detachably fixed with the conductive rod body and the conductive insert respectively so as to realize radial detachment along the cylinder body; the length of the detachable section is greater than the inserting fit length of the conductive rod and the conductive insert; the single-post insulator is detachably fixed on the barrel, a maintenance port is formed in the barrel, a detachable sealing cover is arranged at the maintenance port, and a tool is inserted into the barrel through the maintenance port to detach the detachable section; the barrel is internally provided with an avoidance space in the radial direction of the barrel, and the avoidance space is used for the conducting rod to axially enter along the bus unit so as to be integrally positioned in the barrel of the bus unit.
2. The busbar unit for a conduit busbar according to claim 1, wherein: the inserting structure is provided with an inserting section used for being in conductive inserting matching with the conductive rods in the adjacent bus units, and an accommodating section used for accommodating the inserting ends of the conductive rods in the adjacent bus units along the inserting direction, wherein the axial size of the accommodating section is larger than or equal to that of the inserting section.
3. The busbar unit for a pipe busbar according to claim 1 or 2, wherein: and connecting flanges are arranged at two axial ends of the detachable section, and the detachable fixing is realized through the connecting flanges and corresponding bolts.
4. The busbar unit for a pipe busbar according to claim 1 or 2, wherein: the conductive insert on the fixed support insulator and the conductive rod are provided with two contact fingers which are arranged at intervals along the axial direction of the cylinder body, and a guide ring for guiding the conductive rod is arranged between the two contact fingers.
5. The busbar unit for a pipe busbar according to claim 1 or 2, wherein: the movable supporting insulator comprises a conductive insert, at least two guide rings are arranged between the inner wall of the conductive insert on the movable supporting insulator and the conductive rod, and a contact finger which is used for enabling the conductive rod and the conductive insert on the movable supporting insulator to be equipotential is arranged between the two guide rings.
6. The busbar unit for a pipe busbar according to claim 1 or 2, wherein: the maintenance port at the fixed supporting insulator and/or the maintenance port at the movable supporting insulator are/is an insulator take-out port, and the insulator take-out port corresponds to the single-post insulator along the radial direction of the cylinder body and is used for taking out the fixed supporting insulator or the movable supporting insulator at the corresponding position from the cylinder body.
7. The busbar unit for a pipe busbar according to claim 1 or 2, wherein: the fixed supporting insulator is arranged at one end of the bus unit, and the movable supporting insulator is arranged in the middle of the bus unit.
8. Pipeline generating line, including the generating line unit who docks in proper order, its characterized in that: the bus bar unit is the bus bar unit of the pipe bus bar according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910395444.2A CN110212478B (en) | 2019-05-13 | 2019-05-13 | Pipeline bus and bus unit of pipeline bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910395444.2A CN110212478B (en) | 2019-05-13 | 2019-05-13 | Pipeline bus and bus unit of pipeline bus |
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| CN110212478A CN110212478A (en) | 2019-09-06 |
| CN110212478B true CN110212478B (en) | 2020-10-30 |
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| CN201910395444.2A Active CN110212478B (en) | 2019-05-13 | 2019-05-13 | Pipeline bus and bus unit of pipeline bus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111509658B (en) * | 2020-03-20 | 2022-05-17 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | GIL equipment standard unit based on novel internal structure and implementation method |
| CN114765358B (en) * | 2021-01-13 | 2024-05-17 | 河南平高电气股份有限公司 | GIL (gas insulated switchgear) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2004027932A2 (en) * | 2002-09-17 | 2004-04-01 | Saudi Arabian Oil Company | Fire safety fusible link electrical terminal block |
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| CN104143801A (en) * | 2013-09-26 | 2014-11-12 | 国家电网公司 | Conducting rod supporting structure and pipeline bus using same |
| CN104538916A (en) * | 2014-11-14 | 2015-04-22 | 北京电力设备总厂有限公司 | Detachable bus unit and rigid gas insulation electric transmission line |
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| CN110212478A (en) | 2019-09-06 |
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