CN110211769B - Sulfur hexafluoride phase-shifting transformer - Google Patents
Sulfur hexafluoride phase-shifting transformer Download PDFInfo
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- CN110211769B CN110211769B CN201910528306.7A CN201910528306A CN110211769B CN 110211769 B CN110211769 B CN 110211769B CN 201910528306 A CN201910528306 A CN 201910528306A CN 110211769 B CN110211769 B CN 110211769B
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- 229910018503 SF6 Inorganic materials 0.000 title claims abstract description 38
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 229960000909 sulfur hexafluoride Drugs 0.000 title claims abstract description 38
- 238000007789 sealing Methods 0.000 claims abstract description 208
- 239000011324 bead Substances 0.000 claims abstract description 57
- 229920001971 elastomer Polymers 0.000 claims abstract description 15
- 230000006835 compression Effects 0.000 claims abstract description 6
- 238000007906 compression Methods 0.000 claims abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 113
- 239000003292 glue Substances 0.000 claims description 35
- 230000000712 assembly Effects 0.000 claims description 25
- 238000000429 assembly Methods 0.000 claims description 25
- 229910052742 iron Inorganic materials 0.000 claims description 25
- 230000007246 mechanism Effects 0.000 claims description 25
- 238000004804 winding Methods 0.000 claims description 25
- 238000001816 cooling Methods 0.000 claims description 11
- 210000001520 comb Anatomy 0.000 claims description 4
- 230000010363 phase shift Effects 0.000 claims 2
- 238000001179 sorption measurement Methods 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 description 18
- 239000010959 steel Substances 0.000 description 18
- 238000012423 maintenance Methods 0.000 description 11
- 238000009413 insulation Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- 239000000565 sealant Substances 0.000 description 6
- 239000003921 oil Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 229910001369 Brass Inorganic materials 0.000 description 3
- 229910000976 Electrical steel Inorganic materials 0.000 description 3
- 239000010951 brass Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000000274 adsorptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010073 coating (rubber) Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- 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
- H01F27/02—Casings
- H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements
-
- 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
- H01F27/22—Cooling by heat conduction through solid or powdered fillings
-
- 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
- H01F27/24—Magnetic cores
- H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
-
- 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
- H01F27/24—Magnetic cores
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/263—Fastening parts of the core together
-
- 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
- H01F27/33—Arrangements for noise damping
-
- 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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/341—Preventing or reducing no-load losses or reactive currents
-
- 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
- H01F27/24—Magnetic cores
- H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
- H01F27/2455—Magnetic cores made from sheets, e.g. grain-oriented using bent laminations
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformer Cooling (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention discloses a sulfur hexafluoride phase-shifting transformer, which comprises a gas tank with a sulfur hexafluoride filled in an inner cavity and a transformer component positioned in the gas tank, wherein a conducting rod and a sealing assembly are arranged on a tank cover of the gas tank, the sealing assembly comprises a sealing ring, a sealing rubber bead and a nut which are all sleeved on the conducting rod, and the nut is in threaded connection with the conducting rod; the sealing ring is positioned on one side of the nut, which is close to the box cover, a sealing groove is arranged on the sealing ring, the sealing groove is of an elliptic paraboloid structure, the sealing rubber beads are matched with the sealing groove, the plane ends of the sealing rubber beads are contacted with the box cover, and the sealing rubber beads are in an axial compression state. The invention utilizes the sealing surface with a specific shape, further increases the sealing force of the sealing part, improves the sealing performance of the sealing structure, and can completely meet the sealing between the gas tank adopting the pressure insulating gas and the conducting rod.
Description
Technical Field
The invention relates to the field of transformers, in particular to a sulfur hexafluoride phase-shifting transformer.
Background
The phase-shifting transformers used by the current three-phase high-power frequency converter are all H-level insulated dry air-cooled indoor transformers. The oil-immersed phase-shifting transformer has the defects of large size, more material consumption, high cost, dust fog pollution and insulation drop …, and can overcome the defects, such as small size, less material consumption, low cost, and no fear of dust fog pollution and rain pollution. However, the oil-immersed phase-shifting transformer is difficult to accept by many indoor users due to the inflammability of the transformer oil. The sulfur hexafluoride gas-insulated phase-shifting transformer is a novel transformer developed aiming at the defects of the dry-type and oil-immersed transformers.
Sulfur hexafluoride gas has the convective heat dissipation capability equivalent to that of transformer oil under two atmospheric pressures; at three atmospheres, its insulation properties are comparable to transformer oil. The density of sulfur hexafluoride gas at three atmospheres is 18.27kg/m3, one cubic meter of such sulfur hexafluoride gas has a price of up to about 1500 yuan, and one cubic meter of transformer oil has a weight of 900kg and a price of at least 15000 yuan. The material cost of the sulfur hexafluoride transformer is lower than that of the oil immersed transformer.
The prior art CN205248064U discloses a sulfur hexafluoride gas insulated transformer, which mainly comprises an iron core and a low-voltage coil wound on the iron core; a high-voltage coil sleeved outside the low-voltage coil; the fully-sealed gas tank is used for bearing the iron core, the low-voltage coil and the high-voltage coil, and is filled with sulfur hexafluoride gas serving as a cooling insulating medium. In this prior art, it is mentioned that a high-voltage insulating sleeve and a low-voltage insulating sleeve connected to the user terminal are also provided on the cover of the gas tank. The low-voltage insulating sleeve is also called as a silicone rubber catheter for a primary lead, and the number of the low-voltage insulating sleeve is small; the high-voltage insulating sleeve is also called a secondary winding lead pipe, and the number of the high-voltage insulating sleeve is large.
Typically, the 6 kV-level transformer is 15 groups of windings and corresponds to 45 secondary winding lead pipes; the 10 kV-level transformer is 24 groups of windings and corresponds to 72 secondary winding lead pipes. The lead wire guide pipe is a conductive rod with an insulating layer on the outer surface. Such a large number of conductor bars is distributed over the cover, which results in particularly high sealing performance requirements for the sealing arrangement between the individual conductor bars and the cover. In particular, such a transformer insulated by gas is more critical in terms of sealing performance, and the sealing between the gas tank and the conductive rod is required to maintain high sealing efficiency for a long period of time. Because the case cover needs to be distributed with a plurality of conducting rods, the arrangement of the conducting rods and the whole installation space need to be considered in the adoption of the sealing structure, and the sealing structure with large structure and complex installation is not suitable to be adopted. Therefore, the existing conductive rods are sealed by arranging a plurality of layers of conventional sealing rings.
In practical use, the sealing structure with simple structure and general sealing performance often has sealing failure, which leads to the increase of the later maintenance frequency and the increase of the maintenance cost, but is contrary to the original aims of improving the performance of the transformer and reducing the cost. For the gas tank with the pressure gas inside, the sealing performance of the conventional sealing structure cannot meet the high-efficiency sealing requirement of the sulfur hexafluoride gas insulation transformer.
Disclosure of Invention
The invention aims at: the sulfur hexafluoride phase-shifting transformer solves the technical problem that a sealing structure at a conducting rod of a transformer insulated by gas is not suitable for a transformer filled with pressure gas, and sealing performance of the transformer does not meet sealing requirements of a gas tank of the transformer. The sulfur hexafluoride phase-shifting transformer changes the traditional simple structure of sealing by arranging one or more layers of sealing rings, further increases the sealing force of sealing parts by utilizing the sealing rings with specific shapes, improves the sealing performance of the sealing structure, can completely meet the sealing between a gas tank adopting pressure insulating gas and a conductive rod, reduces the maintenance frequency and the maintenance cost of the transformer, and is consistent with the purpose of improving the performance of the transformer and reducing the cost by adopting the sulfur hexafluoride phase-shifting transformer.
The technical scheme adopted by the invention is as follows:
the sulfur hexafluoride phase-shifting transformer comprises a gas tank with a sulfur hexafluoride filled in an inner cavity and a transformer component positioned in the gas tank, wherein a plurality of conducting rod assemblies are arranged on a tank cover of the gas tank, each conducting rod assembly comprises a conducting rod with one end penetrating through the tank cover and a sealing assembly for sealing a matching part between the tank cover and the conducting rod, each sealing assembly comprises a sealing ring, a sealing rubber bead and a nut which are sleeved on the conducting rod, and the nuts are in threaded connection with the conducting rod;
The sealing ring is positioned at one side of the nut close to the box cover, one end of the sealing ring close to the box cover is provided with a sealing groove, the sealing groove is of an elliptic paraboloid structure, and the central line of the sealing groove is coincident with the axis of the conducting rod;
The appearance structure of the sealing glue bead consists of an elliptic paraboloid which is consistent with the shape and the size of the sealing groove and a plane which covers the port of the elliptic paraboloid, the sealing glue bead is matched with the sealing groove, preferably in interference fit, the plane end of the sealing glue bead is contacted with the case cover, the sealing glue bead is provided with a through hole A for the conductive rod to pass through, the through hole A is in interference fit with the conductive rod, and the sealing glue bead is in an axial compression state.
The conducting rod is provided with a sealing ring, the sealing ring is preferably formed by turning round steel, and an inner sealing groove is a sealing surface designed by the invention and is a groove body for gathering sealing force, namely a force gathering groove because the sealing ring is an elliptic paraboloid. The outer surface of the sealing glue bead matched with the sealing groove is also an elliptic paraboloid. The sealant beads are in interference fit with the sealing grooves, namely, the sealant beads are in a radial compression state in the sealing grooves. The purpose of adopting oval paraboloid is to turn a part of axial pressure of the nut to the sealing ring into radial pressure of the sealing rubber bead to the conducting rod after the nut is screwed down, so that the sealing between the sealing rubber bead and the conducting rod is tighter.
The sealing groove is of an elliptic paraboloid structure, and the longitudinal section of the sealing groove is an ellipse which comprises half of a complete focus. When the nut presses down the sealing ring, the sealing ring presses down the sealing rubber beads, and part of the axial pressure of the nut to the sealing ring is converted into the radial pressure of the sealing rubber beads to the conducting rod, so that the sealing rubber beads are compressed axially and radially. The original sealing glue beads are in interference fit with the conductive rods through the through holes A, and then the sealing glue beads are radially stressed by extrusion of the sealing grooves of the specially-designed elliptic paraboloid structures, so that the sealing force between the sealing glue beads and the conductive rods is further increased, the sealing performance between the sealing glue beads and the conductive rods is improved, sealing pretightening force is generated between the sealing glue beads and the conductive rods, the effectiveness of sealing parts between the sealing glue beads and the conductive rods is guaranteed, and the sealing parts are prevented from failing. Here, the axial pressure generated when the nut is screwed on the conducting rod can be focused on the force gathering groove on the conducting rod through the elliptic paraboloid on the sealing cover, so that the extremely high pressure is generated, the sealing glue beads and the conducting rod are pressed more tightly, and leakage of sulfur hexafluoride gas is avoided.
In summary, the invention cancels the traditional simple structure of sealing by arranging one or more layers of sealing rings, utilizes the sealing surface with a specific shape, further increases the sealing force of the sealing part, improves the sealing performance of the sealing structure, ensures that the sealing between the gas tank adopting pressure insulating gas and the conducting rod can be completely satisfied, reduces the maintenance frequency and the maintenance cost of the transformer, and is consistent with the original purpose of improving the performance and reducing the cost of the transformer by adopting the sulfur hexafluoride phase-shifting transformer.
Due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. The invention discloses a sulfur hexafluoride phase-shifting transformer, which cancels the traditional simple structure of sealing by arranging one or more layers of sealing rings, utilizes the sealing surface with a specific shape, further increases the sealing force of a sealing part, improves the sealing performance of the sealing structure, can completely meet the sealing between a gas tank adopting pressure insulating gas and a conducting rod, reduces the maintenance frequency and the maintenance cost of the transformer, and is consistent with the original purpose of improving the performance and reducing the cost of the transformer by adopting the sulfur hexafluoride phase-shifting transformer;
2. according to the sulfur hexafluoride phase-shifting transformer, the air guide sleeve and the exhaust fan are arranged, so that the transformer can be forcedly cooled, and the working environment of the transformer is improved;
3. According to the sulfur hexafluoride phase-shifting transformer, after the iron core column is assembled, gaps exist among the vertical frames, noise can be generated, and no-load current is increased; therefore, the middle part of each rectangular frame is preferably bent to enable the parts at the core column to be in plane contact in turn, thereby eliminating the gap of each vertical frame, reducing noise and no-load current
Drawings
For a clearer description of the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and should not be considered as limiting the scope, for those skilled in the art, without performing creative efforts, other related drawings may be obtained according to the drawings, where the proportional relationships of the components in the drawings in the present specification do not represent the proportional relationships in actual material selection design, and are merely schematic diagrams of structures or positions, where:
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the invention in a bottom view;
FIG. 3 is a schematic view of the longitudinal cross-sectional structure of the present invention;
FIG. 4 is a schematic view of the structure of the air box;
FIG. 5 is a schematic illustration of the mating of the seal assembly with the conductive rod;
FIG. 6 is a schematic structural view of a seal ring;
FIG. 7 is a schematic structural view of a sealant bead;
FIG. 8 is a schematic structural view of a transformer component;
Fig. 9 is a front view of a transformer component;
FIG. 10 is a cross-sectional view of A-A of FIG. 9;
FIG. 11 is a schematic structural view of the core mated with the core clamping assembly;
Fig. 12 is a schematic structural view of the core clamping assembly;
FIG. 13 is a top view of FIG. 12;
fig. 14 is a schematic structural view of the iron core;
fig. 15 is a top view of the core;
fig. 16 is a schematic structural view of embodiment 7;
fig. 17 is a top view of an iron core stack;
FIG. 18 is a tooling for stacking core legs;
fig. 19 is a schematic view of the structure in the direction a in fig. 18.
The reference numerals in the drawings indicate:
1-air box, 2-box cover, 3-conducting rod, 4-sealing ring, 5-sealing bead, 6-nut, 7-sealing groove, 8-through hole A, 9-annular groove, 10-flange, 11-cooling fin, 12-air guide cover, 13-fan, 14-through hole B, 15-access opening, 16-access door, 17 a-upper frame edge, 17-B lower frame edge, 17C-vertical frame edge 17, 18-foot-supporting channel, 19-fixed support lug, 20-rotating support lug, 21-hanging shaft, 22-outer plate, 23-inner plate, 24-screw A, 25-nut A, 26-screw B, 27-nut B, 28-U-shaped plate, 29-circular plate, 30-end plate, 31-screw C, 32-nut C, 33-center screw, 34-center nut, 35-fixed plate, 36-support plate, 37-positioning through hole, 38-long support block, 39-winding rubber coating pad, 40-connecting arm, 41-iron core, 42-inner insulation cylinder, 43-inner and 44-high-voltage comb, 45-high-voltage outer cylinder, 48-secondary winding, high-voltage comb, outer cylinder, high-voltage insulation comb, 48-outer coil, secondary winding, high-voltage comb, outer coil, and outer coil winding;
the lower iron yoke is 1 a-insulated, the clamping piece 2 a-insulated, the clamping piece 3 a-arched, the screw rod of the iron yoke 4 a-drawn tape 5 a-and the iron core pad 6 a-;
1 b-upright clamps, 2 b-uprights, 3 b-movable jaws, 4 b-iron core columns, 5 b-uprights, 6 b-iron yokes, 8 b-iron core foot pads and 9 b-stacking platforms.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the invention, i.e., the embodiments described are merely some, but not all, of the embodiments of the invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
All of the features disclosed in this specification, or all of the steps in a method or process disclosed, may be combined in any combination, except for mutually exclusive features and/or steps.
The present invention will be described in detail with reference to fig. 1 to 16.
Example 1
As shown in fig. 1-7, the sulfur hexafluoride phase shifting transformer comprises a gas tank 1 with a sulfur hexafluoride filled in an inner cavity and a transformer component positioned in the gas tank 1, wherein a plurality of conducting rod assemblies are arranged on a tank cover 2 of the gas tank 1, each conducting rod assembly comprises a conducting rod 3 with one end penetrating through the tank cover 2 and a sealing assembly for sealing a matching part between the tank cover 2 and the conducting rod 3, each sealing assembly comprises a sealing ring 4, a sealing glue bead 5 and a nut 6 which are sleeved on the conducting rod 3, and the nut 6 is in threaded connection with the conducting rod 3;
The sealing ring 4 is positioned at one side of the nut 6 close to the box cover 2, a sealing groove 7 is formed in one end of the sealing ring 4 close to the box cover 2, the sealing groove 7 is of an elliptic paraboloid structure, and the central line of the sealing groove is coincident with the axis of the conducting rod 3;
the appearance structure of the sealing glue bead 5 comprises an elliptic paraboloid which is consistent with the shape and the size of the sealing groove 7 and a plane which covers the port of the elliptic paraboloid, the sealing glue bead 5 is matched with the sealing groove 7, preferably in interference fit, the plane end of the sealing glue bead 5 is contacted with the box cover 2, the sealing glue bead 5 is provided with a through hole A8 for the conducting rod 3 to pass through, the through hole A8 is in interference fit with the conducting rod 3, and the sealing glue bead 5 is in an axial compression state.
The conductive rod is preferably brass, which allows for both electrical conductivity and mechanical strength and ease of machining. Preferably, a transformer conducting rod with a capacity of 4000kVA or less is usedIs processed with brass rods having a capacity of 4000kVA or more, preferably/>The brass rod is processed.
The conducting rod 3 is provided with a sealing ring 4, the sealing ring 4 is preferably formed by turning round steel, and an inner sealing groove 7 is a sealing surface designed by the invention and is a groove body for concentrating sealing force, namely a force concentrating groove, because the sealing groove is an elliptic paraboloid. The outer surface of the sealing glue bead 5 matched with the sealing groove 7 is also an elliptic paraboloid. The sealant bead 5 is in interference fit with the sealing groove 7, namely, the sealant bead 5 is in a radial compression state in the sealing groove 7. The purpose of adopting the elliptic paraboloid is to convert a part of axial pressure of the nut 6 to the sealing ring 4 into radial pressure of the sealing rubber beads 5 to the conducting rod after the nut 6 is screwed down, so that the sealing between the sealing rubber beads 5 and the conducting rod 3 is tighter.
The sealing groove 7 has an elliptic paraboloid structure, and the longitudinal section of the sealing groove is an ellipse which comprises half of a complete focus. When the nut 6 presses down the sealing ring 4, the sealing ring 4 presses down the sealing bead 5, and a part of the axial pressure of the nut 6 to the sealing ring 4 is converted into the radial pressure of the sealing bead 5 to the conducting rod, which results in that the sealing bead 5 is compressed axially and radially. Originally, the sealing glue beads 5 are in interference fit with the conductive rods 3 through the through holes A8, and then the sealing glue beads 5 are radially stressed by extrusion of the sealing grooves 7 of the specially-designed elliptic paraboloid structure, so that the sealing force between the sealing glue beads 5 and the conductive rods 3 is further increased, the sealing performance between the sealing glue beads 5 and the conductive rods 3 is improved, sealing pretightening force is generated between the sealing glue beads 5 and the conductive rods 3, the effectiveness of sealing parts between the sealing glue beads 5 and the conductive rods 3 is guaranteed, and the sealing parts are prevented from losing efficacy. Here, the axial pressure generated when the nut is screwed on the conducting rod can be focused on the force gathering groove on the conducting rod through the elliptic paraboloid on the sealing cover, so that the extremely high pressure is generated, the sealing glue beads and the conducting rod are pressed more tightly, and leakage of sulfur hexafluoride gas is avoided.
In summary, the invention cancels the traditional simple structure of sealing by arranging one or more layers of sealing rings, utilizes the sealing surface with a specific shape, further increases the sealing force of the sealing part, improves the sealing performance of the sealing structure, ensures that the sealing between the gas tank adopting pressure insulating gas and the conducting rod can be completely satisfied, reduces the maintenance frequency and the maintenance cost of the transformer, and is consistent with the original purpose of improving the performance and reducing the cost of the transformer by adopting the sulfur hexafluoride phase-shifting transformer.
The gas tank adopted in the invention is a reinforced sealed gas tank. The walls of the box are preferably rolled into a cylinder by steel plates with the thickness of 6mm or more; the bottom of the case is preferably made of steel plate having a thickness of 12mm and above. The case cover is preferably processed by a high-density epoxy cloth plate with the thickness of 50mm or more; the case lid is fixed on the case wall through the case flange seal, and the case flange is preferably processed with the steel sheet of thickness 25mm and above to processing seal groove is convenient for the sealing member embedding, in order to realize the sealing connection between case lid and the case wall. All the welding parts designed in the invention are welded with a welding surface which is required to be beveled and welded on two sides.
Example 2
This embodiment is further described with respect to the cooperation between the conductive rod 3 and the sealant bead 5 based on embodiment 1.
In the invention, as shown in fig. 5-7, an annular groove 9 is arranged on the side wall of the conductive rod 3 in the through hole A8, the axis of the annular groove 9 coincides with the axis of the conductive rod 3, the part of the sealing glue bead 5 opposite to the annular groove 9 is outwards protruded to form an annular flange 10, and the flange 10 is in interference fit with the annular groove 9.
Example 3
The embodiment is described with respect to forced diversion cooling of a transformer.
As shown in fig. 1 to 3, in the present invention, a forced air guide device is provided on the air tank 1, the forced air guide device includes a guide hood 12 and an exhaust fan 13, the guide hood 12 is a cylindrical structure with an open bottom and a closed top, the top end of the air tank 1 is inserted into the guide hood 12 from the bottom end of the guide hood 12, a through hole B14 is provided at the closed end of the guide hood 12, the exhaust fan 13 is installed in the through hole B14, and the exhaust fan 13 draws air from the bottom end of the guide hood 12 upward.
Further, a plurality of cooling fins 11 are uniformly arranged on the side wall of the air box 1 at intervals in sequence along the circumferential direction of the air box 1, and the cooling fins 11 are positioned in the air guide sleeve 12.
Preferably, the heat sink 11 is a corrugated plate. The radiating fin can be a planar radiating fin and can be a corrugated plate. When corrugated board is used, it is preferred that the corrugated board extends along an axis corrugated perpendicular to the ground.
The air guide sleeve 12 is preferably formed by rolling a 3mm steel plate into a cylinder to wrap the radiating fins 11, welding a flange on the upper part, and covering the flange with a 4mm steel plate. A through hole B14 is formed in the middle of the steel plate, and a powerful exhaust fan 13 is arranged in the through hole B14 to form a forced guiding air cooling effect. The arrangement of the air guide sleeve 12 and the exhaust fan 13 can forcedly cool down the transformer and improve the working environment of the transformer.
Example 4
The structure of the pod is further described in this embodiment.
As shown in fig. 1-2, in the present invention, an access opening 15 is provided on a side wall of the air guide sleeve 12, an access door 16 is hinged on an outer wall of the air guide sleeve 12 and located on one side of the access opening 15, and rotation of the access door 16 about a hinged axis enables the access door 16 to cover the access opening 15, and the access door is in adsorptive connection with the air guide sleeve 12 through a magnetic sealing rubber strip.
In order to facilitate the wiring of the transformer by the staff, an access opening 15 is provided in the upper part of the side wall of the nacelle 12. Two access openings 15 are preferably provided for wiring the primary and secondary terminals, respectively. Magnetic sealing rubber strips are arranged around the access hole 15, and are covered by an access door 16. Meanwhile, the door lock is provided, so that non-maintenance personnel can be prevented from entering the door lock by mistake.
The settings for the door lock are as follows: a fixed lug 19 is arranged on the side wall of the air guide sleeve 12 and positioned at one side of the access opening 15 and away from the hinge part, one end of the fixed lug 19 is welded on the side wall of the air guide sleeve 12, and the other end of the fixed lug extends around the axis of the hinge; a fixing through hole is arranged on the fixing support lug 19, and the axis of the fixing through hole is perpendicular to the ground; a rotating lug 20 is welded at the end of the access door 16 far away from the hinge, and a strip-shaped through hole for the fixed lug 19 to pass through is arranged on the rotating lug 20. When the access door 16 is locked, the access door 16 covers the access hole 15, the fixing lugs 19 are provided with strip-shaped through holes through which one ends of the fixing through holes pass, and then the lock beams of the padlock pass through the fixing through holes and are locked with the locked catches.
Example 5
The embodiment is to explain the iron core structure of the transformer in the invention.
As shown in fig. 14-15, in the present invention, the transformer component includes a triangular three-dimensional wound iron core, windings wound on three core columns, and an iron core clamping assembly, the iron core includes three rectangular frame units, the rectangular frame units are symmetrically distributed around the center of the axis of the air box 1, the rectangular frame units include a plurality of rectangular frames stacked along an axis orthogonal to the axis of the air box 1, the rectangular frames are all parallel to the axis of the air box 1, the cross section of the iron core is triangular, and each rectangular frame unit is located on one side of the triangle; the rectangular frame comprises an upper frame edge 17a, a lower frame edge 17b and two vertical frame edges 17c, wherein two ends of the vertical frame edges 17c are respectively contacted with the upper frame edge 17a and the lower frame edge 17 b;
The upper frame edge 17a forms an upper iron yoke, the lower frame edge 17b forms a lower iron yoke of the iron core, and the vertical frame edges 17c on two sides of one rectangular frame unit form core columns with the vertical frame edges 17c adjacent to the other two rectangular frame units respectively;
The iron core tightening assembly tightens and fixes each rectangular frame;
The bottom of the iron core is provided with a foot pad, and the iron core is fixed in the air box 1 through the foot pad.
When the winding core of the three-dimensional structure is adopted, the core column part and the yoke part are preferably detached for facilitating the winding to be sleeved on the core.
Example 6
This embodiment further describes the iron core of embodiment 5.
As shown in fig. 14 to 15, in each rectangular frame unit, as the rectangular frames are far from the axis of the air box 1, the first frame, the second frame … … N frame and the n+1th frame … … X frame are sequentially arranged, the widths of the rectangular frames are sequentially increased from the first frame to the N frame, the widths of the vertical frame sides 17c are sequentially increased, the upper frame side 17a, the lower frame side 17b and the vertical frame side 17c of each rectangular frame are respectively contacted with the upper frame side 17a, the lower frame side 17b and the vertical frame side 17c of the adjacent rectangular frame unit, a circle is drawn on the cross section of the core column of the iron core, and the contact parts of each rectangular frame in one rectangular frame unit and the other rectangular frame unit are arranged along one diameter of the circle, which is orthogonal with the axis center of the air box 1;
The width of the rectangular frames is sequentially reduced from the Nth frame to the X frame, the width dimension of the vertical frame edge 17c is sequentially reduced, and the outer sides of the vertical frame edges 17c are all positioned on the circumference of the circle;
Of the respective stile sides constituting the same stem, the inner side of the stile side 17c is located on the circumference of the circle. N, X is a natural number, X > N.
The iron core is formed by superposing various sheet-shaped materials, so that the core column is non-circular, and the winding is inconvenient to assemble; the cross section of the limb is preferably as close to circular as possible by the definition of the dimensions of the individual sheet-like materials, to facilitate the nesting of the windings.
Example 7
This embodiment further describes the iron core designed in embodiment 6.
As shown in fig. 16, in the present invention, the middle parts of the rectangular frames are protruded toward the axis of the air box 1, so that the parts between the two vertical frame sides 17c contacting with the upper frame side 17a and the lower frame side 17b are arc-shaped, and the vertical frame sides 17c positioned on the same circle and the parts contacting with the vertical frame sides 17c on the upper frame side 17a and the lower frame side 17b are parallel to the diameter of the circle which is intersected with the center of the axis of the air box 1.
When the iron core column is assembled, gaps exist among the vertical frames, noise can be generated, and no-load current is increased. Therefore, in the technical scheme, the middle parts of the rectangular frames are preferably bent so that the parts at the core columns are sequentially contacted in a plane mode, so that gaps of the vertical frames are eliminated, noise is reduced, and no-load current is reduced.
Example 8
The present embodiment is further described for the sealing structure between the conductive rod 3 and the cover 2 designed in the present invention.
In the invention, two sealing assemblies are sleeved on each conducting rod 3, and the two sealing assemblies sleeved on the same conducting rod 3 are respectively positioned on the upper side and the lower side of the box cover 2. And each seal assembly includes two nuts.
Sealing components are arranged on the conducting rod 3 and at the upper end and the lower end of the box cover 2, so that the sealing performance is improved in multiple times, and the excellent sealing performance of the invention is further ensured.
Example 9
The embodiment is to make an implementation description for the hoisting use of the invention.
In the present invention, as shown in fig. 2, two foot-supporting channel steels 18 are disposed at the bottom of the air box 1, the axes of the foot-supporting channel steels 18 are parallel to each other and are symmetrical along the center of the axis of the air box 1, and the top of the foot-supporting channel steels is connected with the bottom of the air box 1. The two ends of the foot-pad channel steel 18 are respectively provided with a telescopic hanging shaft 21 for integrally hanging the transformer.
Example 10
The present embodiment is an illustration of an iron core clamping assembly for an iron core according to the present invention.
The core clamping assembly may be an existing clamping assembly or a clamping assembly designed in this embodiment.
The clamping assembly comprises a plane clamping mechanism and a vertical clamping mechanism, the plane clamping mechanism comprises three side clamping mechanisms, three corner connecting assemblies and a plurality of face connecting assemblies, the side clamping mechanisms and the corner connecting assemblies are sequentially arranged in a staggered mode and are ring-shaped, the side clamping mechanisms respectively correspond to one rectangular frame unit, the side clamping mechanisms respectively comprise an outer plate 22 and an inner plate 23 which are parallel to the axis of the air box 1, the inner plate 22 is located at one side, close to the axis of the air box 1, of the corresponding rectangular frame unit, the outer plate 22 is located at one side, far away from the axis of the air box 1, of the rectangular frame unit, a plurality of face connecting assemblies are arranged at the upper end and the lower end of the side clamping assemblies, the face connecting assemblies comprise screw rods A24 and two nuts A25, two ends of each screw rod A24 respectively penetrate through lugs on the outer plate 22 and lugs on the inner plate 23 and then are in threaded connection with the nuts A25, and the opposite faces of the outer plate 22 and the inner plate 23 respectively contact with a first rectangular frame and an X-th rectangular frame.
The angle connecting assembly is used for connecting and fixing the side clamping mechanisms on two sides of the angle connecting assembly, the angle connecting assembly comprises two angle connecting units, each angle connecting unit comprises a screw rod B26 and two nuts B27, and two ends of each screw rod B26 respectively penetrate through one outer plate 22 and then are in threaded connection with the nuts B27.
The angle connection unit further comprises two U-shaped plates 28, inclined planes are milled at the two end parts of the U-shaped plates, so that rectangular plates are arranged at the end parts of the U-shaped plates and are changed into right-angle triangular plates, the U-shaped plates 28 are respectively connected with one side, far away from the axis of the air box 1, of one outer plate 22, the U-shaped plates 28 are welded on the outer plate 22 through the inclined planes, meanwhile, the middle plate of the U-shaped plates is perpendicular to the axis of the screw rod B26, and the nuts B27 are in surface-to-surface contact with the outer convex surfaces of the middle plate.
The two plane clamping mechanisms are respectively positioned at the upper end and the lower end of the iron core.
The vertical clamping mechanism comprises two end face assemblies, three vertical connecting assemblies and a central connecting assembly, wherein the end face assemblies comprise a circular plate 29 and three end plates 30 which are uniformly distributed along the circumferential direction of the circular plate 29, the axis of the circular plate 29 coincides with the axis of the air box 1, the end plates 30 are perpendicular to the axis of the air box 1, one end of each end plate 30 is connected with the side wall of the circular plate 29, and the other end of each end plate is positioned outside the iron core; the upper and lower sides of the end face assembly core are respectively in contact with a planar clamping mechanism, preferably the lower surface of the end plate 30 is in contact with the upper end of the outer plate 22. The vertical connecting assembly comprises a screw rod C31 and two nuts C32, the axis of the screw rod C31 is parallel to the axis of the air box 1, and two ends of the screw rod C31 respectively penetrate through one end plate 30 and are in threaded connection with the nuts C32. The central connecting assembly comprises a central screw rod 33 and two central nuts 34, wherein two ends of the central screw rod 33 respectively penetrate through a circular plate 29 and are in threaded connection with the central nuts 34.
The bottom of the end face assembly positioned at the bottom of the iron core is provided with a foot pad, the foot pad comprises a central plate and three fixing plates 35, one end of each fixing plate 35 is connected with the central plate, the other end of each fixing plate 35 extends to one side far away from the axis of the air box 1, the fixing plates 35 are respectively positioned right below one end plate 30, the fixing plates 35 are connected with the end plates 30 through a plurality of supporting plates 36, and positioning through holes 37 are formed in the fixing plates 30.
Three groups of coil cushion block groups are respectively arranged on opposite sides of the upper side clamping mechanism and the lower side clamping mechanism, the coil cushion block groups respectively correspond to one core column, and the coil cushion block groups are provided with four coil cushion blocks which are sequentially and uniformly distributed at intervals along the outer sides of the core columns. The coil cushion block comprises a long cushion block 38 and a connecting arm 40, the connecting arm 40 is welded on the outer plate 22, the long cushion block 38 is fixed on the connecting arm 40 through screws, a coil cushion 39 is arranged on one side, close to the winding, of the long cushion block 38, and the coil cushion 39 is in contact with the winding end.
When the rectangular frame is not bent, the iron core separator 41 is provided at a portion where two axially adjacent rectangular frame units are in contact with each other.
Example 11
This embodiment is an explanation of the winding of the present invention.
An inner insulating cylinder 42 is sleeved on the core column, an upper inner gasket 43 is sleeved at the upper end and the lower end of the inner insulating cylinder, a plurality of inner high-voltage combs 44 are uniformly distributed along the axial direction of the gasket and are arranged between the upper inner gasket and the lower inner gasket, and the two ends of each inner high-voltage comb are respectively connected with one inner gasket; a plurality of groups of primary windings 45 are sleeved on the inner high-voltage comb, so that two axially adjacent wires in the coil are separated by comb teeth on the inner high-voltage comb. An outer insulating cylinder 46 is sleeved outside the primary winding, an upper outer gasket 47 is sleeved at the upper end and the lower end of the outer insulating sleeve, a plurality of outer high-voltage combs 48 are uniformly distributed along the axial direction of the gasket and are arranged between the upper outer gasket and the lower outer gasket, and the two ends of each outer high-voltage comb are respectively connected with one outer gasket; a plurality of groups of secondary windings 49 are sleeved on the outer high-voltage comb, so that two axially adjacent wires in the coil are separated by comb teeth on the outer high-voltage comb.
Example 12
This embodiment describes the main assembly steps of the core designed in embodiment 7.
1. One of the methods for forming the three-dimensional transformer core is as follows: the iron yoke is firstly overlapped, and then the iron core column is inserted.
1) Cutting the specified sheet wide silicon steel sheet strip into 45-degree isosceles trapezoid column sheets and isosceles trapezoid yoke sheets with certain lengths. And spraying quick-drying insulating paint at the position of the 45-degree shear part. Note that the calculation of the central length of the yoke,
The formula: lo=pi Mo/3-n pi δ
Wherein: lo … yoke piece center length mm
Pi … circumference ratio 3.1416
Mo … column core distance mm
N … lamination layers 0,1,2,3 … …
The thickness of the delta … silicon steel sheet is 0.3mm
The above formula is simplified as: lo=1.047×mo-n×0.942, and shearing of the yoke length should be done on a numerically controlled machine tool.
2) On the core stacking platform, core foot pads 6a and foot pad insulation are placed. And then, the isosceles trapezoid yokes are regularly stacked on a stacking platform to form a Y-shaped iron yoke, a clamp insulator 2a and an arc clamp 3a are installed, and an iron yoke screw 4a and a drawstring 5a are screwed down to complete the assembly of the lower iron yoke 1 a.
3) And placing the stacked lower iron yoke on an iron core stacking platform, so that the center of the triangular space of the iron yoke is opposite to the upright post hole on the stacking platform. The upright posts are inserted into the upright post holes, upright post clamps for positioning the iron core columns are fastened on the upright posts, the movable jaws of the upright post clamps the inserted and stacked iron core columns so as to prevent the iron core from tilting, and then the inserted and stacked iron core columns are bound by the weft-free glass fiber ribbon according to the interval of 100-120 mm.
2. A second method for forming the three-dimensional transformer core: the iron core column is firstly overlapped, and then the iron yoke is inserted.
1. Lamination forming of iron core column
1) Cutting the specified sheet wide silicon steel sheet strip into 45-degree isosceles trapezoid sheets and isosceles trapezoid yokes with certain lengths. And spraying quick-drying insulating paint at the position of the 45-degree shear part.
2) The isosceles trapezoid column sheets are regularly stacked on a stacking platform to form Cheng Tiexin columns 4b, and the sections of the Cheng Tiexin columns are in a stepped shape which is externally connected with a circle.
3) And (3) binding the stacked iron core columns with weft-free glass fiber belts according to the interval of 100-120 mm.
4) And 2) stacking two iron core columns according to the steps 2) and 3).
2. Iron yoke insert sheet forming three-dimensional iron core and transformer assembly
1) Three iron core columns are vertically clamped by clamping pieces on the upright posts on the three-dimensional iron core stacking table, and the core distance of the columns is kept to be equilateral triangle.
2) The isosceles trapezoid yokes are sequentially inserted into the core columns, and the yokes are kept to be bent into circular arcs. The inserted three-phase iron yoke is Y-shaped.
3) The three-phase iron yoke is clamped by using an arched clamping piece, a clamping piece insulator and an iron yoke screw rod, and the middle part is tensioned by using a pull belt.
4) The iron core pad foot is installed and insulated, the clamping piece is connected with the iron core pad foot through bolts, and nuts are screwed down.
5) And connecting three upright posts of the iron core stacking table by using channel steel, and installing a rotating shaft on the channel steel. And (3) dismantling three upright post connecting bolts of the stacking table, and hoisting the rotating shaft by using a crane to enable the iron core to be wholly lifted off the ground. Rotating the rotating shaft turns the iron core 180 degrees to enable the iron core foot pad to fall to the ground. And (3) removing the three upright posts and the iron core post clamping pieces of the stacking table, so that the three-dimensional iron core without the upper iron yoke is left.
6) Placing a three-dimensional iron core without an upper iron yoke on a platform, then performing body insulation assembly, sleeving a primary coil and a secondary coil of a phase-shifting transformer, positioning and fastening in a radial direction, then inserting and stacking the upper iron yoke according to the steps 2) and 3), mounting a clamping piece for insulation, clamping the three-phase iron yoke by using an iron yoke screw rod to clamp an arched upper clamping piece, and tensioning the middle part by using a weft-free glass fiber ribbon.
7) The upper clamping piece and the lower clamping piece are tensioned by a pull screw rod, and meanwhile, the coil is tightly pressed by an upper iron yoke cushion block, a lower iron yoke cushion block and a pressing nail.
8) Connecting primary leads, and sequentially connecting the heads on a primary side sleeve of the box cover; and connecting the secondary leads, and sequentially connecting the heads to the secondary-side wiring terminals of the box cover. The core-coil assembly that completes the above core, coil, insulation and lead assembly is referred to as a body.
9) The body is hoisted in a sealed air box.
10 And (3) placing a flange sealing element, screwing up a nut, and finally installing a guide cover with an exhaust fan, thereby completing the assembly of the transformer.
Example 13
The present embodiment is described with respect to an air box.
The gas tank needs to bear 5 kg of pressure for a long time without leakage, so the wall of the gas tank is rolled into a cylinder by a steel plate with the thickness of 6mm or more, the bottom of the gas tank is welded by a steel plate with the thickness of 12mm or more, the tank cover is provided with a 50mm epoxy cloth plate, the tank cover is drilled with holes, and a high-voltage sleeve, a tapping switch and a low-voltage outlet conduit are arranged; in order to carry out the heat emitted by the transformer, the outer surface of the box body is required to be spot welded with corrugated cooling fins. And rolling the corrugated cooling fin into a cylinder by using a 2mm steel plate, welding a 4mm steel plate on the upper part, forming a hole in the middle, and installing a powerful exhaust fan to form a powerful guiding air cooling effect.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not creatively contemplated by those skilled in the art within the technical scope of the present invention should be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.
Claims (9)
1. The utility model provides a sulfur hexafluoride phase shift transformer, includes gas tank (1) that is filled with sulfur hexafluoride in the inner chamber and is arranged in the transformer part of gas tank (1), is provided with a plurality of conducting rod subassemblies on case lid (2) of gas tank (1), the conducting rod subassembly includes conducting rod (3) that one end runs through case lid (2) and with the sealed sealing component of cooperation position between case lid (2) and conducting rod (3), its characterized in that: the sealing component comprises a sealing ring (4), a sealing glue bead (5) and a nut (6) which are all sleeved on the conducting rod (3), wherein,
The nut (6) is in threaded connection with the conductive rod (3);
The sealing ring (4) is positioned at one side of the nut (6) close to the box cover (2), one end of the sealing ring (4) close to the box cover (2) is provided with a sealing groove (7), the sealing groove (7) is of an elliptic paraboloid structure, and the center line of the sealing groove is coincident with the axis of the conducting rod (3);
The appearance structure of the sealing glue bead (5) consists of an elliptic paraboloid which is consistent with the shape and the size of the sealing groove (7) and a plane which covers the port of the elliptic paraboloid, the sealing glue bead (5) is in interference fit with the sealing groove (7), the plane end of the sealing glue bead (5) is in contact with the box cover (2), a through hole A (8) for the conducting rod (3) to pass through is arranged on the sealing glue bead (5), the through hole A (8) is in interference fit with the conducting rod (3), and the sealing glue bead (5) is in an axial compression state;
The transformer component comprises a triangular three-dimensional coiled iron core, windings and an iron core clamping assembly, wherein the windings and the iron core clamping assembly are wound on three core columns, the iron core comprises three rectangular frame units, the rectangular frame units are symmetrically distributed around the center of the axis of the air box (1), each rectangular frame unit comprises a plurality of rectangular frames which are overlapped along an axis which is positively intersected with the axis of the air box (1), the rectangular frames are parallel to the axis of the air box (1), the cross section of the iron core is triangular, and each rectangular frame unit is respectively positioned on one side of the triangle; the rectangular frame comprises an upper frame edge (17 a), a lower frame edge (17 b) and two vertical frame edges (17 c), wherein two ends of the vertical frame edge (17 c) are respectively contacted with the upper frame edge (17 a) and the lower frame edge (17 b);
The upper frame edges (17 a) form an upper iron yoke, the lower frame edges (17 b) form a lower iron yoke of the iron core, and the vertical frame edges (17 c) on two sides of one rectangular frame unit respectively form core columns with the vertical frame edges (17 c) adjacent to the two other rectangular frame units;
The iron core clamping assembly clamps and fixes each rectangular frame;
The bottom of the iron core is provided with a foot pad, and the iron core is fixed in the air box (1) through the foot pad;
An inner insulating cylinder (42) is sleeved on the core column, an upper inner gasket (43) is sleeved at the upper end and the lower end of the inner insulating cylinder (42), a plurality of inner high-pressure combs (44) are uniformly distributed along the axial direction of the inner gasket (43) between the upper inner gasket and the lower inner gasket (43), and the two ends of each inner high-pressure comb (44) are respectively connected with one inner gasket (43); a plurality of groups of primary windings (45) are sleeved on the inner high-voltage comb (44), so that two axially adjacent wires in the coil are separated by comb teeth on the inner high-voltage comb (44); an outer insulating cylinder (46) is sleeved outside the primary winding, an upper outer gasket (47) is sleeved at the upper end and the lower end of the outer insulating cylinder (46), a plurality of outer high-voltage combs (48) are uniformly distributed along the axial direction of the outer gasket (47) between the upper outer gasket (47) and the lower outer gasket (47), and the two ends of each outer high-voltage comb (48) are respectively connected with one outer gasket (47); a plurality of groups of secondary windings (49) are sleeved on the outer high-voltage comb (48), so that two axially adjacent wires in the coil are separated by comb teeth on the outer high-voltage comb;
The iron core clamping assembly comprises a plane clamping mechanism and a vertical clamping mechanism, the plane clamping mechanism comprises three side clamping mechanisms, three corner connecting assemblies and a plurality of surface connecting assemblies, the side clamping mechanisms and the corner connecting assemblies are sequentially arranged in a staggered mode and encircle to form a ring shape, the side clamping mechanisms respectively correspond to one rectangular frame unit, the side clamping mechanisms comprise an outer plate (22) and an inner plate (23) which are parallel to the axis of the air box (1), the inner plate (23) is positioned on one side, close to the axis of the air box (1), of the corresponding rectangular frame unit, the outer plate (22) is positioned on one side, far away from the axis of the air box (1), of the rectangular frame unit, the surface connecting assemblies are respectively arranged at the upper end and the lower end of the side clamping mechanisms, the surface connecting assemblies comprise screw rods A (24) and two nuts A (25), two ends of each screw rod A (24) respectively penetrate through lugs on the outer plate (22) and lugs on the inner plate (23) and then are in threaded connection with the nuts A (25), and the opposite surfaces of the outer plate (22) are respectively contacted with the inner side and the rectangular frame unit;
the angle connecting assembly comprises two angle connecting units, the angle connecting units comprise a screw rod B (26) and two nuts B (27), two ends of the screw rod B (26) respectively penetrate through one outer plate (22) and are in threaded connection with the nuts B (27), and the angle connecting assembly is used for connecting and fixing side clamping mechanisms positioned on two sides of the angle connecting assembly;
The angle connecting unit further comprises two U-shaped plates (28), inclined surfaces are milled at the two end parts of the U-shaped plates, so that rectangular plates are arranged at the end parts of the U-shaped plates and are changed into right-angle triangular plates, the U-shaped plates (28) are respectively connected with one side, far away from the axis of the air box (1), of one outer plate (22), the U-shaped plates (28) are welded on the outer plate (22) through the inclined surfaces, meanwhile, the middle plate of the U-shaped plates is perpendicular to the axis of the screw rod B (26), and the nuts B (27) are in surface-to-surface contact with the outer convex surfaces of the middle plate;
The two plane clamping mechanisms are respectively positioned at the upper end and the lower end of the iron core;
the vertical clamping mechanism comprises two end face assemblies, three vertical connecting assemblies and a central connecting assembly, wherein the end face assemblies comprise a circular plate (29) and three end plates (30) which are uniformly distributed along the circumferential direction of the circular plate (29), the axis of the circular plate (29) coincides with the axis of the air box (1), the end plates (30) are perpendicular to the axis of the air box (1), one end of each end plate (30) is connected with the side wall of the circular plate (29), and the other end of each end plate is positioned at the outer side of the iron core; the two end face assemblies are respectively arranged on the upper side and the lower side of the iron core, and the opposite faces of the two end face assemblies are respectively contacted with a plane clamping mechanism;
The vertical connecting assembly comprises a screw rod C (31) and two nuts C (32), the axis of the screw rod C (31) is parallel to the axis of the air box (1), and two ends of the screw rod C respectively penetrate through one end plate (30) and are in threaded connection with the nuts C (32); the center connecting assembly comprises a center screw rod (33) and two center nuts (34), and two ends of the center screw rod (33) respectively penetrate through a circular plate (29) and are in threaded connection with the center nuts (34).
2. The sulfur hexafluoride phase shifting transformer of claim 1, wherein: an annular groove (9) is formed in the side wall, located in the through hole A (8), of the conducting rod (3), the axis of the annular groove (9) coincides with the axis of the conducting rod (3), a circular flange (10) is outwards protruded at the position, opposite to the annular groove (9), of the sealing glue bead (5), and the flange (10) is in interference fit with the annular groove (9).
3. The sulfur hexafluoride phase shifting transformer of claim 1, wherein: the forced flow guiding device is arranged on the air box (1), the forced flow guiding device comprises a flow guiding cover (12) and an exhaust fan (13), the flow guiding cover (12) is of a cylindrical structure with an opening at the bottom and a closed top, the top end of the air box (1) is inserted into the flow guiding cover (12) from the bottom end of the flow guiding cover (12), a through hole B (14) is formed in the closed end of the flow guiding cover (12), the exhaust fan (13) is arranged in the through hole B (14), and the exhaust fan (13) is used for exhausting gas from the bottom end of the flow guiding cover (12) upwards.
4. A sulfur hexafluoride phase shifting transformer as defined in claim 3 wherein: a plurality of cooling fins (11) are uniformly arranged on the side wall of the air box (1) at intervals in sequence along the circumferential direction of the air box (1), and the cooling fins (11) are positioned in the air guide sleeve (12).
5. The sulfur hexafluoride phase shifting transformer of claim 4, wherein: the radiating fins (11) are corrugated plates.
6. A sulfur hexafluoride phase shifting transformer as defined in claim 3 wherein: an access opening (15) is formed in the side wall of the air guide sleeve (12), an access door (16) is hinged to the outer wall of the air guide sleeve (12) and located on one side of the access opening (15), the access door (16) can be rotated around the hinged axis, the access door (16) can cover the access opening (15), and the access door is in adsorption connection with the air guide sleeve (12) through a magnetic sealing rubber strip.
7. The sulfur hexafluoride phase shifting transformer of claim 1, wherein: in each rectangular frame unit, along with the direction away from the axis of the air box (1), the rectangular frames are sequentially a first frame, a second frame … … th frame and an n+1th frame … … th frame, the widths of the rectangular frames are sequentially increased from the first frame to the nth frame, meanwhile, the width sizes of the vertical frame sides (17 c) are sequentially increased, the upper frame side (17 a), the lower frame side (17 b) and the vertical frame side (17 c) of each rectangular frame are respectively contacted with the upper frame side (17 a), the lower frame side (17 b) and the vertical frame side (17 c) in the adjacent rectangular frame units, a circle is drawn on the cross section of a core column of the iron core, and the contact parts of each rectangular frame in one rectangular frame unit and the other rectangular frame unit are arrayed along the diameter of one circle which is directly intersected with the axis center of the air box (1);
The width of the rectangular frames is sequentially reduced from the Nth frame to the X frame, the width dimension of the vertical frame edge (17 c) is sequentially reduced, and the outer sides of the vertical frame edges (17 c) are all positioned on the circumference of the circle;
of the individual stiles that make up the same stem, the inner sides of the stiles (17 c) are all located on the circumference of the circle.
8. The sulfur hexafluoride phase shifting transformer of claim 1, wherein: in each rectangular frame unit, along with the direction away from the axis of the air box (1), the rectangular frames are a first frame and a second frame … … X frame in sequence, the widths of the rectangular frames are reduced in sequence from the first frame to the X frame, the width sizes of the vertical frame sides (17 c) are reduced in sequence, the upper frame side (17 a), the lower frame side (17 b) and the vertical frame side (17 c) of the first frame of the rectangular frame are respectively contacted with the upper frame side (17 a), the lower frame side (17 b) and the vertical frame side (17 c) of the first frame of the adjacent rectangular frame units, and the two adjacent rectangular frame units draw a circle on the cross section of the core column of the iron core;
of the respective stile sides constituting the same stem, the outside and inside of the stile side (17 c) are both located on the circumference of the circle;
The middle parts of the rectangular frames are protruded outwards towards the axis of the air box (1), so that the parts between the two vertical frame sides (17 c) contacted with the upper frame side (17 a) and the lower frame side (17 b) on the upper frame side (17 a) and the lower frame side (17 b) are arc-shaped, and the parts contacted with the vertical frame sides (17 a) on the same circle as the vertical frame sides (17 c) on the upper frame side and the lower frame side (17 b) are parallel to the diameter of the circle, which is orthogonal to the axis center of the air box (1).
9. A sulfur hexafluoride phase shift transformer in accordance with any one of claims 1-8 wherein: two sealing assemblies are sleeved on each conducting rod (3), and the two sealing assemblies sleeved on the same conducting rod (3) are respectively located on the upper side and the lower side of the box cover (2).
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| CN201910528306.7A CN110211769B (en) | 2019-06-18 | 2019-06-18 | Sulfur hexafluoride phase-shifting transformer |
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| CN201910528306.7A CN110211769B (en) | 2019-06-18 | 2019-06-18 | Sulfur hexafluoride phase-shifting transformer |
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| CN103413659A (en) * | 2013-09-02 | 2013-11-27 | 丹阳市金诺电器有限公司 | Combined type 1-KV level transformer bushing |
| CN203882783U (en) * | 2014-05-26 | 2014-10-15 | 李振平 | Sleeve insulation part |
| JP2017073517A (en) * | 2015-10-09 | 2017-04-13 | 富士電機株式会社 | Iron core support structure and iron core support method of transformer |
| CN106935375A (en) * | 2015-12-29 | 2017-07-07 | 保定保菱变压器有限公司 | A kind of SF6 gas-insulated transformer |
| CN206412182U (en) * | 2016-12-26 | 2017-08-15 | 伊戈尔电气股份有限公司 | A kind of antidetonation dry-type transformer |
| CN107369534A (en) * | 2017-07-14 | 2017-11-21 | 合肥天威众元电气有限公司 | A kind of three-phase solid laminated core transformer |
| CN108899161A (en) * | 2018-07-02 | 2018-11-27 | 张家港鑫峰机电有限公司 | A kind of step-up transformer with protection shock-absorbing function |
| CN109066447A (en) * | 2018-10-12 | 2018-12-21 | 山东彼岸电力科技有限公司 | A kind of gas insulated bushing end seal structure |
| CN109193417A (en) * | 2018-07-22 | 2019-01-11 | 国网新疆电力有限公司和田供电公司 | A kind of outdoor box device for transformer |
| CN209766185U (en) * | 2019-06-18 | 2019-12-10 | 四川智翔电器有限公司 | Sulfur hexafluoride phase-shifting transformer |
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| CN201717083U (en) * | 2010-07-16 | 2011-01-19 | 许�鹏 | Novel phase-electricity recognition cover-free double-sealing transformer porcelain sleeve |
| CN103413659A (en) * | 2013-09-02 | 2013-11-27 | 丹阳市金诺电器有限公司 | Combined type 1-KV level transformer bushing |
| CN203882783U (en) * | 2014-05-26 | 2014-10-15 | 李振平 | Sleeve insulation part |
| JP2017073517A (en) * | 2015-10-09 | 2017-04-13 | 富士電機株式会社 | Iron core support structure and iron core support method of transformer |
| CN106935375A (en) * | 2015-12-29 | 2017-07-07 | 保定保菱变压器有限公司 | A kind of SF6 gas-insulated transformer |
| CN206412182U (en) * | 2016-12-26 | 2017-08-15 | 伊戈尔电气股份有限公司 | A kind of antidetonation dry-type transformer |
| CN107369534A (en) * | 2017-07-14 | 2017-11-21 | 合肥天威众元电气有限公司 | A kind of three-phase solid laminated core transformer |
| CN108899161A (en) * | 2018-07-02 | 2018-11-27 | 张家港鑫峰机电有限公司 | A kind of step-up transformer with protection shock-absorbing function |
| CN109193417A (en) * | 2018-07-22 | 2019-01-11 | 国网新疆电力有限公司和田供电公司 | A kind of outdoor box device for transformer |
| CN109066447A (en) * | 2018-10-12 | 2018-12-21 | 山东彼岸电力科技有限公司 | A kind of gas insulated bushing end seal structure |
| CN209766185U (en) * | 2019-06-18 | 2019-12-10 | 四川智翔电器有限公司 | Sulfur hexafluoride phase-shifting transformer |
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