CN219371958U - Wall bushing of oil-gas structure - Google Patents
Wall bushing of oil-gas structure Download PDFInfo
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- CN219371958U CN219371958U CN202223112551.6U CN202223112551U CN219371958U CN 219371958 U CN219371958 U CN 219371958U CN 202223112551 U CN202223112551 U CN 202223112551U CN 219371958 U CN219371958 U CN 219371958U
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Abstract
The utility model discloses a wall bushing of an oil-gas structure, which comprises a wall-penetrating flange, two outer insulating sleeves, two inner insulating sleeves, a capacitor core and a current carrying pipe, wherein the wall-penetrating flange, the outer insulating sleeves and the outer seal form a closed accommodating space; the carrier tube is coaxially arranged in the accommodating space, and two ends of the carrier tube penetrate through the corresponding outer seals and extend to the outer side of the outer insulating sleeve; the capacitor core is arranged outside the current-carrying tube body and positioned in the accommodating space, and the two inner insulating sleeves are sleeved at the two ends of the capacitor core; an air chamber is formed between the outer insulating sleeve and the corresponding inner insulating sleeve, and insulating gas is filled in the air chamber; an oil chamber is formed between the inner insulating sleeve and the through-wall flange as well as between the inner insulating sleeve and the capacitor core, and insulating oil is filled in the oil chamber. The wall bushing with the oil-gas structure has the advantages of good electrical insulation level, excellent mechanical and sealing properties, high safety and reliability in product use, capability of ensuring safe and reliable operation of high-voltage alternating current and direct current systems, and good use value and application prospect.
Description
Technical Field
The utility model relates to a wall bushing with an oil-gas structure, and belongs to the technical field of wall bushings.
Background
Most of the existing wall bushings are porcelain bushing oil-filled structure wall bushings, and a structural schematic diagram of the wall bushings is shown in fig. 2.
At present, along with the requirement of large-capacity long-distance alternating current and direct current transmission, the voltage level of a transmission line is higher and higher, and the length (insulation distance) and related size of an outer insulation porcelain bushing of a wall bushing are also larger and larger, so that the weight moment of materials such as parts at two ends of a wall bushing flange and transformer oil thereof is also increased. According to the data of millions of volts porcelain bushing oil-filled structure wall bushing actually used by some units such as domestic electric power institute, the weight moment can reach 1.33kg/mm to the mechanical stress generated on the porcelain bushing end material 2 And the maximum allowable stress of the standard of the high-strength IV-class porcelain material is 5kg/mm 2 Calculating the mechanical stress margin of the steel sheet to be 3.76; for the electric porcelain brittle material, the safety and reliability of the mechanical stress are low.
When the wall bushing runs, besides the stress of the gravity moment of the parts and related materials on the material at the end part of the porcelain bushing, the wall bushing still needs to bear related mechanical and electric vibration force, the swinging force of the high-voltage transmission line to the bushing under the conditions of wind blowing, snow falling, icing and the like, and the wall bushing still can bear the 8-level earthquake intensity.
The oil-filled structure wall bushing of the porcelain bushing can often cause sealing leakage faults at the joint of the porcelain bushing and the flange and even porcelain bushing breakage and damage accidents in the using and running processes; and the wall bushing with the porcelain bushing oil-filled structure is not suitable for being used in a high-voltage direct current system due to the hydrophobicity and the like of the surface of the porcelain bushing material.
Disclosure of Invention
The utility model provides a wall bushing with an oil-gas structure, which solves the problems of mechanical and sealing reliability in the background art of the wall bushing with the porcelain bushing oil-filled structure and solves the problem that the porcelain bushing oil-filled wall bushing is not suitable for being used in a direct-current high-voltage system.
The technical scheme adopted by the utility model is as follows:
the wall bushing comprises a wall penetrating flange, two outer insulating sleeves, two inner insulating sleeves, a capacitor core and a current carrying pipe, wherein one end of each outer insulating sleeve is respectively fixed with the outer end parts of the two ends of the wall penetrating flange, the other ends of the two outer insulating sleeves are respectively provided with an outer seal, and the wall penetrating flange, the outer insulating sleeves and the outer seals form a closed accommodating space;
the current carrying pipes are coaxially arranged in the accommodating space, and two ends of each current carrying pipe penetrate through the corresponding outer seals and extend to the outer side of the outer insulating sleeve;
the capacitor core is arranged outside the current-carrying pipe body and is positioned in the accommodating space, the two inner insulating sleeves are sleeved at two ends of the capacitor core, one ends of the two inner insulating sleeves are respectively fixed with the inner end parts of the two ends of the through-wall flange, and the other ends of the two inner insulating sleeves are respectively provided with an inner seal for the current-carrying pipe to penetrate through;
an air chamber is formed between the outer insulating sleeve and the corresponding inner insulating sleeve, and insulating gas is filled in the air chamber;
an oil chamber is formed between the inner insulating sleeve and the through-wall flange as well as between the inner insulating sleeve and the capacitor core, and insulating oil is filled in the oil chamber.
Preferably, the through-wall flange is provided with a through hole communicated with the two air chambers, and an air charging seat communicated with the through hole is arranged on the through-wall flange, and insulating gas is charged into the air chambers through the air charging seat.
As one preferable mode of the utility model, the wall-penetrating flange is provided with an oil plug seat and an oil conservator connecting seat which are communicated with the inner cavity of the wall-penetrating flange, an oil plug is arranged in the oil plug seat, and the oil conservator connecting seat is also provided with an oil conservator which is communicated with the inner cavity of the wall-penetrating flange through the oil conservator connecting seat.
Preferably, the wall-through flange is further provided with a measuring terminal seat, and a terminal screen terminal connected with a terminal screen lead of the capacitor core is arranged on the measuring terminal seat.
As one preferable mode of the utility model, the inflation seat, the oil plug seat, the oil conservator connecting seat and the measuring terminal seat are all positioned at the outdoor end of the through-wall flange and positioned on the same ring surface.
As one preferable aspect of the present utility model, connection terminals are provided at both ends of the current-carrying tube.
In one preferred embodiment of the present utility model, sealing rubber rings are provided on the outer end abutting surface of the outer insulating sleeve and the through-wall flange, the inner end abutting surface of the inner insulating sleeve and the through-wall flange, the outer sealing abutting surface of the outer sealing sleeve and the outer insulating sleeve, and the inner sealing abutting surface of the inner sealing sleeve and the inner insulating sleeve.
Preferably, an explosion-proof sheet communicated with the corresponding air chamber is arranged at the outer end of the outer seal at the indoor end.
In one preferred aspect of the present utility model, a seal ring is fitted into a center hole of the outer seal and the inner seal through which the current carrying pipe is inserted.
As a preferable mode of the utility model, the outer insulating sleeve is made of composite silicon rubber, and after the air chamber is filled with insulating gas, the allowable stress value of the outer insulating sleeve is 15-17kg/mm 2 The margin value is 11-15.
The utility model has the beneficial effects that:
1. compared with the existing ceramic bushing oil-filled structure wall bushing, the air chamber is formed between the outer insulating bushing and the corresponding inner insulating bushing of the oil-air structure wall bushing, and insulating gas is filled in the air chamber, so that the original ceramic bushing and related transformer oil and other materials are replaced, the weight of a product is greatly reduced, and the stress margin of the product is improved. Taking a million volt oil-gas structure wall bushing as an example: the maximum allowable stress value of the insulation sleeve outside the oil-filled sleeve of the existing porcelain sleeve is 5kg/mm 2 While the allowable stress value in the utility model can reach 17kg/mm 2 The corresponding margin value is 13.93, which is far greater thanThe stress margin of the existing porcelain bushing oil-filled bushing is 3.76; and simulation calculation of professional software shows that the wall bushing of the oil-gas structure can withstand 8-level earthquake intensity and has a considerable margin.
2. The wall bushing with the oil-gas structure has the advantages of good electrical insulation level, excellent mechanical and sealing properties, high safety and reliability in product use, capability of ensuring safe and reliable operation of high-voltage alternating current and direct current systems, and good use value and application prospect.
Drawings
FIG. 1 is a schematic view of a wall bushing of the present oil-gas construction;
FIG. 2 is a view of a prior art porcelain bushing oil filled construction wall bushing;
FIG. 3 is a schematic view of the construction of a through-wall flange;
FIG. 4 is a cross-sectional view of the through-wall flange after mounting the capacitive core;
FIG. 5 is a schematic view of the junction of the outer insulating sleeve, the inner insulating sleeve and the through-wall flange;
FIG. 6 is a schematic view of the structure of the junction between the inner seal and the inner insulating sleeve;
FIG. 7 is a schematic view of the structure of the junction between the outer seal and the outer insulating sleeve;
the main reference numerals in the figures have the following meanings:
1. the wall-penetrating flange, 2, an outer insulating sleeve, 3, an inner insulating sleeve, 4, a capacitor core, 5, a current-carrying pipe, 6, an outer seal, 7, an inner seal, 8, a sealing rubber ring, 9, a sealing ring, 10, a core clamping ring, 11, a through hole, 12, an inflatable seat, 13, insulating gas, 14, an explosion-proof piece, 15, insulating oil, 16, an oil plug seat, 17, an oil conservator connecting seat, 18, an oil conservator, 19, a measuring terminal seat, 20 and a wiring terminal.
Detailed Description
The utility model is described in detail below with reference to the drawings and examples.
As shown in fig. 1-7: the embodiment is a wall bushing of an oil-gas structure, which comprises a wall-penetrating flange 1 (grounded), two outer insulating sleeves 2, two inner insulating sleeves 3, a capacitor core 4, a carrier pipe 5, two outer seals 6, two inner seals 7, a plurality of sealing rubber rings 8 and a plurality of sealing rings 9.
The capacitor core 4 is coiled outside the tube body of the current-carrying tube 5, the capacitor core 4 passes through the central hole of the through-wall flange 1, 8-12 core clamping rings 10 are arranged between the outer circular surface of the capacitor core 4 and the inner circular wall of the through-wall flange 1 in a lining manner, and the core clamping rings 10 are assembled in the through-wall flange 1 by screws. The core clamping ring 10 has a gap of about 1mm with the outer circular surface of the capacitor core 4, so that the capacitor core 4 is convenient to assemble and position; and a space of more than 20mm is reserved between every two adjacent core clamping rings 10, and the space is used as an oil passage for communicating and flowing insulating oil 15 at two ends of the through-wall flange 1.
The two inner insulating sleeves 3 are respectively sleeved on the outer circular surfaces of the two ends of the capacitor core 4, the sealing rubber rings 8 are placed in the sealing grooves on the inner end surfaces of the through-wall flanges 1, the mounting holes on the adhesive flanges at the ends of the inner insulating sleeves 3 are aligned with the corresponding mounting screw holes on the inner ends of the through-wall flanges 1, and the sealing rubber rings 8 at the joint parts are tightly pressed by the adhesive flange surfaces at the ends of the inner insulating sleeves 3 by screwing screws so as to keep sealing.
The sealing ring 9 is placed in an inner ring groove in a central hole of the inner sealing 7, then the two inner sealing 7 are respectively sleeved on the current carrying pipes 5 at two ends of the capacitor core 4, so that the end face of the inner sealing 7 is pressed to a glue-binding flange face at the other end of the inner insulating sleeve 3, the sealing rubber ring 8 at the joint is pressed and kept sealed, and meanwhile, the sealing effect between the inner sealing 7 and the current carrying pipes 5 can be kept by the sealing ring 9.
The two outer insulating sleeves 2 respectively penetrate through the current carrying tubes 5 at the two ends of the capacitor core and are sleeved on the outer sides of the inner insulating sleeves 3, the sealing rubber rings 8 are placed in sealing grooves on the outer end faces of the through-wall flanges 1, mounting holes on the rubber binding flanges at the ends of the outer insulating sleeves 2 are aligned with corresponding mounting screw holes on the outer ends of the through-wall flanges 1, and the sealing rubber rings 8 at the joint parts are pressed by tightening screws so as to keep sealing.
The sealing ring 9 is placed in an inner ring groove in the central hole of the outer sealing 6, then the two outer sealing 6 are respectively sleeved on the current carrying pipes 5 at two ends of the capacitor core 4, so that the end face of the outer sealing 6 is pressed to the adhesive flange face at the other end of the outer insulating sleeve 2, the sealing rubber ring 8 at the joint is pressed and kept sealed, and meanwhile, the sealing effect between the outer sealing 6 and the current carrying pipes 5 can be kept by the sealing ring 9.
An air chamber is formed between the outer insulating sleeve 2 and the corresponding inner insulating sleeve 3, a through hole 11 for communicating the two air chambers is formed in the wall penetrating flange 1, an inflatable seat 12 (with an inflatable plug) communicated with the through hole 11 is arranged on the wall penetrating flange 1, insulating gas 13 (SF 6 gas) is filled into the air chamber through the inflatable seat 12, the outer insulating sleeve 2 is made of composite silicon rubber, and after the insulating gas 13 is filled into the air chamber, the allowable stress value of the outer insulating sleeve 2 is 15-17kg/mm 2 The margin value is 11-15; the outer end of the outer seal 6 at the indoor end is also provided with a bursting disc 14 communicated with the corresponding air chamber, and when SF6 gas in the air chamber exceeds the upper limit of working pressure, the bursting disc 14 is ruptured to rapidly release fault gas in the sleeve.
An oil chamber is formed between the inner insulating sleeve 3 and the through-wall flange 1 as well as between the capacitor core 4, and insulating oil 15 is filled in the oil chamber; the wall-penetrating flange 1 is provided with an oil plug seat 16 and an oil conservator connecting seat 17 which are communicated with the inner cavity of the wall-penetrating flange 1, and an oil plug (not shown in the figure) is arranged in the oil plug seat 16 and can be pulled out or plugged in again; the oil conservator 18 which is communicated with the inner cavity of the through-wall flange 1 through the oil conservator connecting seat 17 is arranged on the oil conservator connecting seat 17, when in actual use, the oil conservator 18 is arranged above the through-wall sleeve, about 2/3 volume of the oil conservator 18 is insulating oil 15 (transformer oil), about 1/3 volume of the oil conservator 18 is a cavity, and a pipeline is used for connecting the oil conservator 18 to the oil conservator connecting seat 17 on the through-wall flange 1, so that oil in the oil conservator 18 is communicated with oil in the inner insulating sleeve 3, and the expansion and contraction volume change of transformer oil in the sleeve is regulated.
The wall-through flange 1 is further provided with a measuring terminal block 19, and a terminal (not shown) connected with a terminal lead of the capacitor core 4 is mounted on the measuring terminal block 19.
The inflation seat 12, the oil plug seat 16, the oil conservator connecting seat 17 and the measurement terminal seat 19 are all arranged at the outdoor end of the through-wall flange 1 and are positioned on the same ring surface of the through-wall flange 1.
The ends of the current carrying pipes 5 positioned at the outer sides of the two ends of the outer insulating sleeve 2 are respectively provided with a wiring terminal 20, one end of each wiring terminal 20 is connected with an indoor high-voltage transmission line, and indoor high-voltage transmission current is transmitted to the high-voltage transmission line at the other end of the outdoor through a wall bushing.
The wall bushing with the oil-gas structure provided by the utility model has reasonable structural distribution and excellent sealing performance; the composite silicone rubber umbrella cover is adopted, and compared with the porcelain outer insulating cover, the material density ratio of the composite silicone rubber umbrella cover to the porcelain outer insulating cover is about 1.9:2.5, so that the weight is reduced, and the moment stress is reduced; the surface of the silicone rubber umbrella cover has strong hydrophobicity, and is suitable for being used in a high-voltage direct-current system; SF6 gas is filled between the outer insulating sleeve and the inner insulating sleeve, and replaces the parts of the porcelain sleeve oil-filled structure wall bushing in the region, transformer oil and other materials; the ratio of SF6 gas to oil density is about 6:880, the weight of the product is further greatly reduced, the transportation, the installation and the use are convenient, the moment stress of the material is reduced, and the mechanical strength performance level of the sleeve is greatly improved.
The weight of the oil-filled structure wall bushing of the million-volt porcelain bushing is 10000kg, and the weight of the oil-gas structure wall bushing of the million-volt porcelain bushing is 6000kg. The maximum allowable stress value of the insulation sleeve outside the oil-filled sleeve of the existing megavolt porcelain sleeve is 5kg/mm 2 While the allowable stress value in the utility model can reach 17kg/mm 2 The corresponding margin value is 13.93, which is far greater than the stress margin of the existing porcelain bushing oil-filled sleeve by 3.76; and simulation calculation of professional software shows that the wall bushing of the oil-gas structure can withstand 8-level earthquake intensity and has a considerable margin.
The foregoing is merely illustrative of the preferred embodiments of this utility model, and it will be appreciated by those skilled in the art that variations and modifications may be made without departing from the principles of this utility model, and such variations and modifications are to be regarded as being within the scope of this utility model.
Claims (10)
1. The wall bushing with the oil-gas structure is characterized by comprising a wall penetrating flange, two outer insulating sleeves, two inner insulating sleeves, a capacitor core and a current carrying pipe, wherein one end of each of the two outer insulating sleeves is respectively fixed with the outer end parts of the two ends of the wall penetrating flange, the other ends of the two outer insulating sleeves are respectively provided with an outer seal, and the wall penetrating flange, the outer insulating sleeves and the outer seals form a closed accommodating space;
the current carrying pipes are coaxially arranged in the accommodating space, and two ends of each current carrying pipe penetrate through the corresponding outer seals and extend to the outer side of the outer insulating sleeve;
the capacitor core is arranged outside the current-carrying pipe body and is positioned in the accommodating space, the two inner insulating sleeves are sleeved at two ends of the capacitor core, one ends of the two inner insulating sleeves are respectively fixed with the inner end parts of the two ends of the through-wall flange, and the other ends of the two inner insulating sleeves are respectively provided with an inner seal for the current-carrying pipe to penetrate through;
an air chamber is formed between the outer insulating sleeve and the corresponding inner insulating sleeve, and insulating gas is filled in the air chamber;
an oil chamber is formed between the inner insulating sleeve and the through-wall flange as well as between the inner insulating sleeve and the capacitor core, and insulating oil is filled in the oil chamber.
2. The wall bushing of claim 1, wherein the wall-through flange has a through hole therein for connecting the two air chambers, and an air-filling seat is provided on the wall-through flange for connecting the through hole, and insulating gas is filled into the air chambers through the air-filling seat.
3. The wall bushing of claim 2, wherein the wall-through flange is provided with a plug seat and a neck rest connecting seat which are communicated with the inner cavity of the wall-through flange, the plug seat is internally provided with a plug, and the neck rest connecting seat is also provided with a neck rest which is communicated with the inner cavity of the wall-through flange through the neck rest connecting seat.
4. A wall bushing according to claim 3, wherein the wall flange is further provided with a measurement terminal block, and a terminal block connected to a terminal lead of the capacitor core is mounted on the measurement terminal block.
5. The wall bushing of claim 4, wherein the air-filled seat, the oil plug seat, the oil conservator connection seat and the measurement terminal seat are all located at the outdoor end of the wall-through flange and on the same annular surface.
6. The wall bushing of claim 1, wherein terminals are provided at both ends of the carrier tube.
7. The wall bushing of claim 1, wherein sealing rubber rings are arranged on the contact surface of the outer insulating sleeve and the outer end part of the wall penetrating flange, the contact surface of the inner insulating sleeve and the inner end part of the wall penetrating flange, the contact surface of the outer seal and the outer insulating sleeve and the contact surface of the inner seal and the inner insulating sleeve.
8. The wall bushing of claim 1, wherein the outer end of the outer seal at the indoor end is provided with a rupture disc extending through the corresponding air chamber.
9. The wall bushing of claim 1, wherein a seal ring is embedded in a central bore of the outer seal and the inner seal through which the current carrying tube is inserted.
10. The wall bushing of claim 1, wherein the outer insulating sleeve is made of composite silicone rubber, and the allowable stress value of the outer insulating sleeve is 15-18kg/mm after the air chamber is filled with insulating gas 2 The margin value is 11-15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223112551.6U CN219371958U (en) | 2022-11-21 | 2022-11-21 | Wall bushing of oil-gas structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223112551.6U CN219371958U (en) | 2022-11-21 | 2022-11-21 | Wall bushing of oil-gas structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219371958U true CN219371958U (en) | 2023-07-18 |
Family
ID=87144203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223112551.6U Active CN219371958U (en) | 2022-11-21 | 2022-11-21 | Wall bushing of oil-gas structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219371958U (en) |
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2022
- 2022-11-21 CN CN202223112551.6U patent/CN219371958U/en active Active
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