CN108133813B - Output-side-sleeve-free gas-insulated transformer - Google Patents
Output-side-sleeve-free gas-insulated transformer Download PDFInfo
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- CN108133813B CN108133813B CN201810018066.1A CN201810018066A CN108133813B CN 108133813 B CN108133813 B CN 108133813B CN 201810018066 A CN201810018066 A CN 201810018066A CN 108133813 B CN108133813 B CN 108133813B
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- insulating
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- 238000007789 sealing Methods 0.000 claims abstract description 46
- 238000009413 insulation Methods 0.000 claims description 28
- 230000002093 peripheral effect Effects 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 15
- 230000004224 protection Effects 0.000 claims description 13
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 239000004020 conductor Substances 0.000 claims description 7
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 239000004593 Epoxy Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000002826 coolant Substances 0.000 claims description 3
- 238000009422 external insulation Methods 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 229920002379 silicone rubber Polymers 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000004073 vulcanization Methods 0.000 claims description 3
- 229910018503 SF6 Inorganic materials 0.000 description 8
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 8
- 238000009434 installation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000006750 UV protection Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
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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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
- H01F27/325—Coil bobbins
-
- 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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
-
- 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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
- H01F2027/406—Temperature sensor or protection
Abstract
The invention provides a sleeve gas-insulated transformer without an output side, which comprises a shell, a lower connecting flange, a lower cover, a primary sleeve, a body, an upper connecting flange, an upper cover, an inflation valve and a grounding seat, wherein the lower connecting flange is arranged on the lower cover; the shell comprises an insulating cylinder and an insulating umbrella skirt; the upper cover comprises a first cover plate, a second cover plate, an insulating sealing piece, a secondary wiring terminal and an output interface; the shell, the lower connecting flange, the lower cover, the upper connecting flange and the upper cover form a sealed container together, the device body is fixedly arranged in the sealed container, and SF6 gas is filled in the sealed container; the primary sleeve is fixedly arranged on the lower cover in a sealing way; the output interface is arranged on the first cover plate and is electrically connected with a secondary coil outgoing line of the body through a secondary wiring terminal. Through the integral structure design, the invention does not need an output side sleeve communicated with the gas-insulated transformer in the prior art, so that the size and the weight of the transformer are greatly reduced, and the transformer can bear alternating current and direct current voltages when in use, and can effectively meet the requirements of the transformer with strict limits on the size and the weight.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to a gas-insulated transformer which can simultaneously withstand alternating current and direct current voltages and has no output side sleeve.
Background
The gas-insulated transformer has the advantages of incombustibility, explosion resistance, high safety, high voltage and large capacity, and is widely applied to alternating current power grids, particularly suitable for underground power substations, places with more concentrated population in large cities and high safety requirements. The structure of the gas-insulated transformer usually adopts SF6 (sulfur hexafluoride) gas as insulating and radiating medium, and the gas-insulated transformer generally comprises a shell, a body arranged in the shell, an input side sleeve arranged on the side part of the shell and a plurality of output side (secondary side and secondary side) sleeves arranged at the upper end of the shell, wherein the output side sleeve is generally used for meeting the high-potential insulation to ground and supporting wire outlet effect, the output side sleeve is generally large in size and weight, and the common gas-insulated transformer can only bear alternating voltage but not direct voltage.
At present, direct current transmission is rapidly developed in China, and a great deal of market demands exist for gas-insulated transformers which are required to bear alternating current and direct current voltages at the same time. The Chinese patent application document with the application number of 201710723157.0 and the name of gas-insulated transformer discloses an SF6 gas-insulated transformer which can bear alternating voltage and direct voltage during use, and better solves the technical problem that the common gas-insulated transformer can only bear alternating voltage and cannot bear direct voltage; although the output can be realized by only 1 bushing on the output side through the structural design of the secondary bushing, compared with the common gas-insulated transformer with a plurality of output bushings, the volume of the gas-insulated transformer is reduced, and the installation is convenient. However, this type of gas-insulated transformer is still provided with an output bushing, so that its overall size is still large, its dead weight is heavy, and it cannot be effectively applied to installation applications where the size and weight of the transformer are severely limited. Therefore, it is needed to develop a gas-insulated transformer capable of bearing both ac and dc voltages and effectively reducing the size and weight so as to meet the actual market demands.
Disclosure of Invention
The purpose of the invention is that: aiming at the problems in the prior art, the gas-insulated transformer without the output side sleeve is provided, which has the advantages that the size and the weight are greatly reduced through the integral structural design, and the gas-insulated transformer without the output side sleeve can bear alternating current and direct current voltages when in use.
The technical scheme of the invention is as follows: the invention relates to a non-output side sleeve gas-insulated transformer, which comprises a shell, primary sleeves, a body, an inflation valve and SF6 gas, wherein the number of the primary sleeves is 2, the body comprises a primary coil and a secondary coil, and the primary coil is provided with a primary coil outgoing line; the secondary coil is provided with a secondary coil outgoing line, and the structure is characterized in that: the device also comprises a lower connecting flange, a lower cover, an upper connecting flange and a grounding seat;
the shell comprises an insulating cylinder and an insulating umbrella skirt fixedly arranged on the periphery of the insulating cylinder; the lower part of the shell is fixedly connected with the lower connecting flange in a sealing way; the lower cover is fixedly connected with the lower connecting flange in a sealing way and is arranged below the lower connecting flange;
the 2 primary sleeves are fixedly arranged on the lower cover in a sealing way; the 2 primary sleeves are electrically connected with the primary coil outgoing lines;
the upper cover comprises a first cover plate, a second cover plate, a cover plate sealing piece, a cover plate insulating plate, a secondary wiring terminal and an output interface; the first cover plate and the second cover plate are conductor pieces, the middle of the first cover plate is provided with an opening, the second cover plate is fixedly arranged above the opening of the first cover plate, and the sealing piece between the cover plates and the insulating plate between the cover plates are fixedly arranged between the first cover plate and the second cover plate; the secondary wiring terminals are conductor pieces, and 1 secondary wiring terminal is fixedly arranged on the lower end face of the first cover plate and the lower end face of the second cover plate respectively; the 2 secondary wiring terminals are electrically connected with the secondary coil outgoing lines; the output interfaces are respectively arranged on the first cover plate and the second cover plate; the upper cover is fixedly connected with the upper connecting flange in a sealing way through a first cover plate of the upper cover and is arranged above the upper connecting flange; the upper connecting flange is fixedly connected with the upper part of the shell in a sealing way;
the inflation valve is fixedly arranged on the lower cover in a sealing way; the grounding seat is fixedly arranged on the lower end face of the lower cover;
the shell, the lower connecting flange, the lower cover, the upper connecting flange and the upper cover form a sealed container together, the body is fixedly arranged in the sealed container, and the SF6 gas is used as an insulating and cooling medium to fill the sealed container.
The further scheme is as follows: the device also comprises a protection component; the protection component comprises a pressure sensor and a temperature sensor which are fixedly arranged on the first cover plate of the upper cover in a sealing manner, and a sensor protection cover which is fixedly arranged on the first cover plate of the upper cover and used for protecting the pressure sensor and the temperature sensor.
The further scheme is as follows: the device body also comprises a clamping piece, an iron core, a secondary coil insulation cylinder, an insulation support piece, a stay and a shielding piece;
the iron core is fixedly arranged in the insulating cylinder of the shell through the clamping piece; the clamping piece passes through the lower connecting flange and is fixedly arranged on the upper end surface of the lower cover; the primary coil is sleeved on the iron core, and the primary coil is arranged on the iron core to be of a U-shaped structure integrally; the secondary coil insulation cylinder is sleeved on the periphery of the primary coil, and is fixedly arranged on the clamping piece through the insulation supporting piece; a clearance interval forming a first air passage is arranged between the inner peripheral wall of the secondary coil insulating cylinder and the outer periphery of the primary coil; the first air passage is communicated with the inner space of the insulating cylinder of the shell; the stay is fixedly arranged on the outer peripheral wall of the secondary coil insulating cylinder; the secondary coil is wound on the stay, so that a second clearance interval is formed between the inner peripheral wall of the secondary coil and the outer peripheral wall of the secondary coil insulating cylinder, and the second clearance interval forms a second air passage communicated with the inner space of the insulating cylinder of the shell; the shielding piece is coated on the periphery of the secondary coil and enables the secondary coil to be totally closed; the secondary coil outgoing line is led out from the middle part of the secondary coil, passes through the middle part of the upper end of the shielding piece and is electrically connected with the secondary wiring terminal.
The further scheme is as follows: the sizes of the first air passage and the second air passage are determined according to the design according to the grades of the withstand AC/DC voltage when the transformer is used.
The further scheme is as follows: the insulating cylinder of the shell is an epoxy glass fiber cylinder; the insulating umbrella skirt is a silicon rubber umbrella skirt, and the size and the height of the insulating umbrella skirt are correspondingly determined according to the external insulation requirements of different voltage grades; the insulating cylinder is a hollow cylinder structural member; the insulating umbrella skirt is integrally and fixedly arranged on the peripheral wall of the insulating cylinder in a vulcanization mode with the insulating cylinder.
The further scheme is as follows: the lower connecting flange is integrally formed by a connecting ring, a connecting cylinder and a reinforcing rib; a circular sealing groove with a triangular or rectangular cross section which is concave upwards is arranged on the lower end surface of the connecting ring; the lower connecting flange is fixedly connected with the lower cover in a sealing way after a sealing element is arranged in a sealing groove of the connecting ring; after the lower connecting flange is sleeved with the lower periphery of the insulating cylinder of the shell through the connecting cylinder, epoxy resin is poured into a gap between the connecting cylinder of the lower connecting flange and the insulating cylinder of the shell for bonding; the structure of the upper connecting flange is the same as that of the lower connecting flange, and epoxy resin is poured into a gap between the connecting cylinder of the upper connecting flange and the insulating cylinder of the shell for bonding after the upper connecting flange is sleeved with the upper periphery of the insulating cylinder of the shell; the upper connecting flange is fixedly connected with the first cover plate in a sealing way after a sealing piece is arranged in a sealing groove of the connecting ring of the upper connecting flange, and is positioned below the first cover plate.
The further scheme is as follows: the lower cover is an aluminum or steel plate body piece, and is provided with 1 charging valve mounting hole which is penetrated up and down and 2 primary sleeve mounting holes which are penetrated up and down; the first cover plate and the second cover plate of the upper cover are made of aluminum; the lower connecting flange and the upper connecting flange are both cast aluminum flanges.
The further scheme is as follows: the output interface of the upper cover is a counter bore with threads or a socket of a conductor.
The invention has the positive effects that: the output side sleeve-free gas-insulated transformer has the advantages that through the integral structural design, the output side sleeve for meeting the high-potential ground insulation and supporting wire outlet effect is not required to be arranged on the output side, and when the transformer is effectively used, the transformer can bear the electric performance of alternating current and direct current voltages, compared with the prior art, the transformer is greatly reduced in size and weight due to the fact that the output side sleeve with larger size and weight is omitted, and therefore the transformer can effectively meet the requirements of the transformer with strict limitation on size and weight in actual production.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a top view of FIG. 1;
fig. 3 is a bottom view of fig. 1.
The reference numerals in the above figures are as follows:
a shell 1, an insulating cylinder 11 and an insulating umbrella skirt 12; a lower connecting flange 2; a lower cover 3; a primary sleeve 4;
the transformer body 5, the clamping piece 51, the iron core 52, the primary coil 53, the primary coil outgoing line 53-1, the secondary coil 54, the secondary coil outgoing line 54-1, the secondary coil insulation cylinder 55, the insulation support 56, the stay 57, the shielding piece 58 and the first air duct 59;
upper cover 6, first cover 61, second cover 62, inter-cover sealing member 63, inter-cover insulating plate 64, secondary line terminal 65, output interface 66;
an upper connecting flange 7; an inflation valve 8; a grounding seat 9;
protection assembly 10, pressure sensor 101, temperature sensor 102, sensor protection cover 103.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description.
Example 1
Referring to fig. 1 to 3, the output-side-sleeve-free gas-insulated transformer of the present embodiment mainly comprises a housing 1, a lower connection flange 2, a lower cover 3, a primary sleeve 4, a body 5, an upper cover 6, an upper connection flange 7, an inflation valve 8, a grounding seat 9, and SF6 gas.
The shell 1 consists of an insulating cylinder 11 and an insulating umbrella skirt 12 fixedly arranged on the periphery of the insulating cylinder 11, wherein the insulating cylinder 11 is a hollow cylinder structural member made of an insulating material capable of bearing high voltage and mechanical composite force (internal pressure, stretching, bending moment and torque), and in the embodiment, the insulating cylinder 11 is preferably an epoxy glass fiber cylinder; in the embodiment, the insulating umbrella skirt 12 is preferably a silicone rubber umbrella skirt, which is used for meeting the insulation of high potential to the ground and has excellent ultraviolet resistance and ageing resistance; the size and height of the insulating umbrella skirt 12 are determined according to the external insulation requirements of different voltage classes. In this embodiment, the insulating umbrella skirt 12 is preferably fixed to the outer peripheral wall of the insulating cylinder 11 by vulcanization and is integrated with the insulating cylinder 11.
The lower connecting flange 2 is integrally formed by a connecting ring, a connecting cylinder and a reinforcing rib, wherein the connecting ring is a circular plate body piece, the connecting cylinder is a hollow cylinder piece, and the reinforcing rib is arranged between the connecting cylinder and the connecting ring; a circular sealing groove (not shown in the figure) with a triangular or rectangular cross section which is concave upwards is arranged on the lower end surface of the connecting ring; the lower connection flange 2 is preferably a cast aluminium flange in this embodiment. The lower cover 3 is a plate body piece made of aluminum or steel, and the lower cover 3 is provided with 1 charging valve mounting hole which is penetrated up and down and 2 primary sleeve mounting holes which are penetrated up and down. The lower connecting flange 2 is fixedly connected with the lower cover 3 in a sealing way after a sealing element is arranged in a sealing groove of a connecting ring of the lower connecting flange; after the lower connecting flange 2 is sleeved with the lower periphery of the insulating cylinder 11 of the shell 1 by the connecting cylinder, epoxy resin is poured into a gap between the connecting cylinder of the lower connecting flange 2 and the insulating cylinder 11 of the shell 1 for bonding.
The primary sleeve 4 is provided with 2 primary sleeve 4, the 2 primary sleeve 4 and the 2 primary sleeve mounting holes of the lower cover 3 are matched, sealed and fixedly arranged on the lower cover 3, and the upper part of the primary sleeve 4 is communicated with the inner space of the insulating cylinder 11 of the shell 1 through the hollow part of the connecting flange 2. When in use, a power supply is externally connected through 2 primary sleeves 4.
The body 5 mainly comprises a clamping piece 51, an iron core 52, a primary coil 53, a secondary coil 54, a secondary coil insulation barrel 55, an insulation support 56, a stay 57 and a shielding piece 58; the primary coil 53 is provided with a primary coil lead-out wire 53-1; the secondary coil 54 is provided with a secondary coil lead-out wire 54-1.
The iron core 52 is fixedly installed by the clamping piece 51, and the iron core 52 is arranged in the insulating cylinder 11 of the shell 1; the clamping piece 51 is fixedly arranged on the upper end surface of the lower cover 3 after penetrating through the hollow part of the lower connecting flange 2; in this embodiment, the fixing connection manner of the iron core 52 and the clamping member 51 and the fixing connection manner of the clamping member 51 and the lower cover 3 are preferably all bolted.
The primary coil 53 is sleeved on the iron core 52, the primary coil 53 is integrally arranged on the iron core 52 to be of a U-shaped structure, and the outgoing lines 53-1 (incoming lines and outgoing lines) of the primary coil are led out from the same side of the primary coil 53 and then are electrically connected with 2 primary sleeves 4 fixedly arranged on the lower cover 3.
The secondary coil insulation cylinder 55 is sleeved on the periphery of the primary coil 53, the end part of the secondary coil insulation cylinder 55 is fixedly connected with the insulation support piece 56, and the insulation support piece 56 is fixedly connected with the clamping piece 51, so that the secondary coil insulation cylinder 55 is fixedly installed on the clamping piece 51 through the insulation support piece 56; a clearance gap is arranged between the inner peripheral wall of the secondary coil insulating cylinder 55 and the outer periphery of the primary coil 53, and the size of the clearance gap can be correspondingly determined according to different withstand AC/DC voltage grades when the transformer is used; the clearance space constitutes a first air passage 59, and the first air passage 59 communicates with the inner space of the insulating cylinder 11 of the housing 1.
The stays 57 are fixedly provided on the outer peripheral wall of the secondary coil insulation tube 55, and the positions and the number of the stays 57 provided on the outer peripheral wall of the secondary coil insulation tube 55 are determined as needed. The secondary coil 54 is wound on the stay 57 such that a second clearance space is formed between the inner peripheral wall of the secondary coil 54 and the outer peripheral wall of the secondary coil insulation tube 55, the second clearance space forming a second air passage, the second air passage communicating with the inner space of the insulation tube 11 of the housing 1; the height of the stay 57, i.e. the size of the second air passage, can be determined according to the design according to the difference of the withstand ac/dc voltage level of the transformer in use.
The shielding piece 58 is a special-shaped piece made of metal, the shielding piece 58 is integrally formed by adopting a die, the surface is polished again, and paint is sprayed; the shield 58 wraps around the outer periphery of the secondary coil 54 and fully encloses the secondary coil 54; the shield 58 is effective to improve the ac and dc withstand voltage levels of the coil; the secondary coil outgoing line 54-1 (incoming line and outgoing line) is led out from the middle of the secondary coil 54, and the secondary coil outgoing line 54-1 is led out after passing through the middle of the upper end of the shield 58.
The upper cover 6 mainly comprises a first cover plate 61, a second cover plate 62, an inter-cover plate sealing member 63, an inter-cover plate insulating plate 64, a secondary wiring terminal 65 and an output interface 66.
The first cover plate 61 and the second cover plate 62 are both conductive members, and in this embodiment, aluminum is preferably used as the material of the first cover plate 61 and the second cover plate 62; the middle part of the first cover plate 61 is opened, the second cover plate 62 is fixedly arranged above the opening part of the first cover plate 61, and an inter-cover plate sealing element 63 and an inter-cover plate insulating plate 64 are arranged between the second cover plate 62 and the first cover plate 61; the inter-cap insulating plate 64 insulates the second cap plate 62 from the first cap plate 61; the lower end surfaces of the first cover plate 61 and the second cover plate 62 are respectively and fixedly provided with a secondary wiring terminal 65 made of 1 conductor material, and the secondary wiring terminals are correspondingly and electrically connected with the secondary coil outgoing lines 54-1 (incoming lines and outgoing lines); so that the first cover plate 61 and the second cover plate 62 are electrically connected to the aforementioned secondary coil outgoing lines 54-1 (incoming line and outgoing line) through 1 secondary connection terminals 65, respectively; the first cover plate 61 and the second cover plate 62 are respectively provided with 2 output interfaces 66, the output interfaces 66 can be threaded counter bores which are recessed downwards from the upper end surfaces of the first cover plate 61 and the second cover plate 62, and plug-in sockets which are fixedly arranged on the first cover plate 61 and the second cover plate 62 and are electrically connected with the first cover plate 61 and the second cover plate 62 can also be adopted, so that the requirements of users for outputting different wiring modes outwards can be met. In use, 1 output interface 66 on each of the first cover plate 61 and the second cover plate 62 forms one set of outputs, the other set being ready for use.
The structure and the material of the upper connecting flange 7 are the same as those of the lower connecting flange 2, and the installation directions are opposite in use. After the upper connecting flange 7 is sleeved with the upper periphery of the insulating cylinder 11 of the shell 1 by the connecting cylinder, epoxy resin is poured into a gap between the connecting cylinder of the upper connecting flange 7 and the insulating cylinder 11 of the shell 1 for bonding; the upper connecting flange 7 is fixedly connected with the first cover plate 61 in a sealing manner after a sealing element is arranged in a sealing groove of a connecting ring of the upper connecting flange and is positioned below the first cover plate 61.
The air charging valve 8 is fixedly arranged on the lower cover 3 in a sealing way, and an air inlet of the air charging valve 8 extends downwards out of the lower end surface of the lower cover 3; the upper port of the air charging valve 8 extends out of the hollow part of the lower connecting flange 2 and is communicated with the inner space of the insulating cylinder 11 of the shell 1.
The shell 1, the lower connecting flange 2, the lower cover 3, the upper connecting flange 7 and the upper cover 6 together form a sealed container meeting the standard of the pressure container, the body 5 is fixedly arranged in the sealed container, and SF6 gas which is used as an insulating and cooling medium and reaches the set pressure is filled in the sealed container through the charging valve 8.
The grounding seat 9 is fixedly arranged on the lower end surface of the lower cover 3 and is used for grounding when the output-side sleeve-free gas insulation transformer of the embodiment is used.
As a preferred mode, the output side bushing-free gas-insulated transformer of the present embodiment is further provided with a protection assembly 10, and the protection assembly 10 includes a pressure sensor 101, a temperature sensor 102 and a sensor protection cover 103; the pressure sensor 101 and the temperature sensor 102 are fixedly arranged on the first cover plate 61 of the upper cover 6 in a sealing manner; the sensor protection cover 103 is fixedly arranged on the first cover plate 61 of the upper cover 6, and covers the pressure sensor 101 and the temperature sensor 102 to protect the pressure sensor 101 and the temperature sensor 102; the sensor protection cover 103 is provided with a signal wire leading-out hole; the pressure sensor 101 and the temperature sensor 102 are used for monitoring the pressure and the temperature of SF6 gas in the sealed container respectively; when the pressure sensor 101 and the temperature sensor 102 are used, the signal output ends of the pressure sensor and the temperature sensor are in optical signal communication with corresponding monitoring chambers or control chambers through optical fibers, and the interference of electromagnetic fields on signals can be effectively avoided by adopting an optical signal communication mode, so that the problem that signals in the traditional electric signal transmission mode are easily interfered by electromagnetic fields is solved.
The above embodiments are illustrative of the specific embodiments of the present invention, and not restrictive, and various changes and modifications may be made by those skilled in the relevant art without departing from the spirit and scope of the invention, and all such equivalent technical solutions are intended to be included in the scope of the invention.
Claims (5)
1. The utility model provides a no output side sleeve pipe gas-insulated transformer, includes casing (1), primary sleeve pipe (4), body (5), inflation valve (8) and SF6 gas, primary sleeve pipe (4) are equipped with 2, and body (5) include primary coil (53) and secondary coil (54), and primary coil (53) are furnished with primary coil lead-out wire (53-1); the secondary coil (54) is provided with a secondary coil outgoing line (54-1), and is characterized in that: the device also comprises a lower connecting flange (2), a lower cover (3), an upper cover (6), an upper connecting flange (7) and a grounding seat (9);
the shell (1) comprises an insulating cylinder (11) and an insulating umbrella skirt (12) fixedly arranged on the periphery of the insulating cylinder (11); the lower part of the shell (1) is fixedly connected with the lower connecting flange (2) in a sealing way; the lower cover (3) is fixedly connected with the lower connecting flange (2) in a sealing way and is arranged below the lower connecting flange (2);
the 2 primary sleeves (4) are fixedly arranged on the lower cover (3) in a sealing way; the 2 primary sleeves (4) are electrically connected with the primary coil outgoing lines (53-1);
the upper cover (6) comprises a first cover plate (61), a second cover plate (62), an inter-cover plate sealing piece (63), an inter-cover plate insulating plate (64), a secondary wiring terminal (65) and an output interface (66); the first cover plate (61) and the second cover plate (62) are conductor pieces, the middle of the first cover plate (61) is provided with an opening, the second cover plate (62) is fixedly arranged above the opening of the first cover plate (61), and the inter-cover plate sealing piece (63) and the inter-cover plate insulating plate (64) are fixedly arranged between the first cover plate (61) and the second cover plate (62); the secondary wiring terminals (65) are conductor pieces, and the number of the secondary wiring terminals (65) is 1 respectively and fixedly arranged on the lower end face of the first cover plate (61) and the lower end face of the second cover plate (62); 2 secondary connection terminals (65) are electrically connected with the secondary coil outgoing line (54-1); the output interfaces (66) are respectively arranged on the first cover plate (61) and the second cover plate (62); the upper cover (6) is fixedly connected with the upper connecting flange (7) in a sealing way by a first cover plate (61) and is arranged above the upper connecting flange (7); the upper connecting flange (7) is fixedly connected with the upper part of the shell (1) in a sealing way;
the inflation valve (8) is fixedly arranged on the lower cover (3) in a sealing way; the grounding seat (9) is fixedly arranged on the lower end face of the lower cover (3);
the SF6 gas is used as an insulating and cooling medium to fill the sealed container, and the shell (1), the lower connecting flange (2), the lower cover (3), the upper connecting flange (7) and the upper cover (6) form a sealed container together;
the body (5) further comprises a clamping piece (51), an iron core (52), a secondary coil insulation cylinder (55), an insulation support (56), a stay (57) and a shielding piece (58);
the iron core (52) is fixedly arranged in the insulating cylinder (11) of the shell (1) through the clamping piece (51); the clamping piece (51) passes through the lower connecting flange (2) and is fixedly arranged on the upper end surface of the lower cover (3); the primary coil (53) is sleeved on the iron core (52), and the primary coil (53) is arranged on the iron core (52) to be of a U-shaped structure integrally; the secondary coil insulation cylinder (55) is sleeved on the periphery of the primary coil (53), and the secondary coil insulation cylinder (55) is fixedly arranged on the clamping piece (51) through the insulation supporting piece (56); an empty space forming a first air passage (59) is arranged between the inner peripheral wall of the secondary coil insulating cylinder (55) and the outer periphery of the primary coil (53); the first air passage (59) is communicated with the inner space of the insulating cylinder (11) of the shell (1); the stay (57) is fixedly arranged on the outer peripheral wall of the secondary coil insulation cylinder (55); the secondary coil (54) is wound on the stay (57) so that a second clearance interval is formed between the inner peripheral wall of the secondary coil (54) and the outer peripheral wall of the secondary coil insulating cylinder (55), and the second clearance interval forms a second air passage communicated with the inner space of the insulating cylinder (11) of the shell (1); the shielding piece (58) is coated on the periphery of the secondary coil (54) and enables the secondary coil (54) to be fully closed; the secondary coil outgoing line (54-1) is led out from the middle part of the secondary coil (54), passes through the middle part of the upper end of the shielding piece (58) and is electrically connected with the secondary wiring terminal (65);
the sizes of the first air passage (59) and the second air passage are determined according to the design according to the level of the withstand AC/DC voltage when the transformer is used;
the insulating cylinder (11) of the shell (1) is an epoxy glass fiber cylinder; the insulating umbrella skirt (12) is a silicon rubber umbrella skirt, and the size and the height of the insulating umbrella skirt are correspondingly determined according to the external insulation requirements of different voltage grades; the insulating cylinder (11) is a hollow cylinder structural member; the insulating umbrella skirt (12) and the insulating cylinder (11) are integrally and fixedly arranged on the peripheral wall of the insulating cylinder (11) in a vulcanization mode.
2. The output-side bushing-less gas-insulated transformer of claim 1, wherein: also comprises a protection component (10); the protection assembly (10) comprises a pressure sensor (101) and a temperature sensor (102) which are fixedly arranged on the first cover plate (61) of the upper cover (6) in a sealing manner, and a sensor protection cover (103) which is fixedly arranged on the first cover plate (61) of the upper cover (6) and is used for protecting the pressure sensor (101) and the temperature sensor (102).
3. The output-side bushing-less gas-insulated transformer according to claim 1 or 2, characterized in that: the lower connecting flange (2) is integrally formed by a connecting ring, a connecting cylinder and a reinforcing rib; a circular sealing groove with a triangular or rectangular cross section which is concave upwards is arranged on the lower end surface of the connecting ring; the lower connecting flange (2) is fixedly connected with the lower cover (3) in a sealing way after a sealing piece is arranged in a sealing groove of a connecting ring of the lower connecting flange; after the lower connecting flange (2) is sleeved with the lower periphery of the insulating cylinder (11) of the shell (1) through the connecting cylinder, epoxy resin is poured into a gap between the connecting cylinder of the lower connecting flange (2) and the insulating cylinder (11) of the shell (1) for bonding; the structure of the upper connecting flange (7) is the same as that of the lower connecting flange (2), and after the upper connecting flange (7) is sleeved with the upper periphery of the insulating cylinder (11) of the shell (1) through the connecting cylinder, epoxy resin is poured into a gap between the connecting cylinder of the upper connecting flange (7) and the insulating cylinder (11) of the shell (1) for bonding; the upper connecting flange (7) is fixedly connected with the first cover plate (61) in a sealing way after a sealing piece is arranged in a sealing groove of the connecting ring, and is positioned below the first cover plate (61).
4. The output-side bushing-less gas-insulated transformer according to claim 1 or 2, characterized in that: the lower cover (3) is a plate body piece made of aluminum or steel, and the lower cover (3) is provided with 1 charging valve mounting hole which is vertically communicated and 2 primary sleeve mounting holes which are vertically communicated; the first cover plate (61) and the second cover plate (62) of the upper cover (6) are made of aluminum; the lower connecting flange (2) and the upper connecting flange (7) are both cast aluminum flanges.
5. The output-side bushing-less gas-insulated transformer according to claim 1 or 2, characterized in that: the output interface (66) of the upper cover (6) is a threaded counter bore or a socket of a conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810018066.1A CN108133813B (en) | 2018-01-09 | 2018-01-09 | Output-side-sleeve-free gas-insulated transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810018066.1A CN108133813B (en) | 2018-01-09 | 2018-01-09 | Output-side-sleeve-free gas-insulated transformer |
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| Publication Number | Publication Date |
|---|---|
| CN108133813A CN108133813A (en) | 2018-06-08 |
| CN108133813B true CN108133813B (en) | 2023-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810018066.1A Active CN108133813B (en) | 2018-01-09 | 2018-01-09 | Output-side-sleeve-free gas-insulated transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110707541A (en) * | 2019-11-05 | 2020-01-17 | 湖南城市学院 | Cabinet body sealing structure of high-low voltage switch cabinet |
| CN112858395B (en) * | 2021-01-08 | 2022-12-27 | 中国工程物理研究院激光聚变研究中心 | Radioactive material container with real-time detection function |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05234773A (en) * | 1992-02-21 | 1993-09-10 | Mitsubishi Electric Corp | Transformer unit |
| JPH10116736A (en) * | 1996-10-08 | 1998-05-06 | Hitachi Ltd | Electric unit |
| CN107424799A (en) * | 2017-08-22 | 2017-12-01 | 常州东芝变压器有限公司 | gas-insulated transformer |
| CN207909691U (en) * | 2018-01-09 | 2018-09-25 | 常州东芝变压器有限公司 | A kind of no outlet side sheath gas insulating transformer |
-
2018
- 2018-01-09 CN CN201810018066.1A patent/CN108133813B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05234773A (en) * | 1992-02-21 | 1993-09-10 | Mitsubishi Electric Corp | Transformer unit |
| JPH10116736A (en) * | 1996-10-08 | 1998-05-06 | Hitachi Ltd | Electric unit |
| CN107424799A (en) * | 2017-08-22 | 2017-12-01 | 常州东芝变压器有限公司 | gas-insulated transformer |
| CN207909691U (en) * | 2018-01-09 | 2018-09-25 | 常州东芝变压器有限公司 | A kind of no outlet side sheath gas insulating transformer |
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| CN108133813A (en) | 2018-06-08 |
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