CN104376972A - 500kV transformer shock insulation structure and installation method - Google Patents
500kV transformer shock insulation structure and installation method Download PDFInfo
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- CN104376972A CN104376972A CN201410680061.7A CN201410680061A CN104376972A CN 104376972 A CN104376972 A CN 104376972A CN 201410680061 A CN201410680061 A CN 201410680061A CN 104376972 A CN104376972 A CN 104376972A
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Abstract
The invention provides a 500kV transformer shock insulation structure and an installation method. The shock insulation structure comprises a transformer, a foundation and a plurality of shock insulators, wherein the upper end and the lower end of each shock insulator are fixedly connected with a transformer base and the foundation respectively. The installation method of the shock insulation structure mainly includes the steps that firstly, a connecting component is installed on the foundation; secondly, the bottom of each shock insulator is fixedly connected with the connecting component; thirdly, the transformer is placed at the tops of the shock insulators, and the transformer base is fixedly connected with the shock insulators. By adoption of the 500kV transformer shock insulation structure and the installation method, a transformer body can be insulated from the foundation, the transformer can be separated from the earthquake ground movement possibly causing destruction, the earthquake energy spreading path is cut off, earthquake energy transmitted to damageable parts, such as high-tension bushings, oil conservators and low-tension bushings, at the top of the transformer is reduced as much as possible, the amplifying effect of an oil tank is offset, shock resistance of the transformer is greatly improved, and it is ensured that the transformer can still operate safely even in areas of eight to nine degrees of seismic intensity.
Description
Technical field
The present invention relates to power industry 500kY transformer technical field of isolation, especially relate to and be applicable to 8 degree of a kind of 500kY transformer isolation structures to 9 degree of high earthquake intensity areas and installation method.
Background technology
For being arranged on as 8 degree of transformers to 9 degree of high earthquake intensity areas, the earthquake of burst is catastrophic to the destruction that the electric power facilities such as transformer cause, except the huge loss that recovery, reconstruction expenses and power failure after high calamity cause, as the important component part of lifeline engineering, electric power system was once lose efficacy or destroyed, the power breakdown caused thus, not only has a strong impact on normal earthquake relief work work, and the likely secondary disaster such as initiation fire.
500kY transformer common is at present primarily of compositions such as fuel tank, iron core, winding coil, radiator, conservator, bushing, low-tension bushings, iron core wherein, winding coil are arranged in fuel tank, radiator is arranged on fuel tank sidewall, and bushing, low-tension bushing and conservator are often arranged on top of oil-tank.The fuel tank of high-power transformer is often high about about 4 meters, the traditional anti-shock methods of transformer is by transformer body and base solder or is bolted, namely transformer base adopts the fixed installation mode be connected with pre-embedded anchoring bolts usually, or transformer base adopts the fixed form of welding with pre-embedded steel slab.Although this mounting means can the displacement of limiting transformer when earthquake and Oscillation Amplitude to a certain extent, but seismic energy is inputted to apparatus body swimmingly from bottom to top, by basis, considerably increase seismic energy and geological process power that transformer body bears, increase the possibility that in transformer body, element destroys, thus reduce the fail safe of transformer device structure system.
Transformer, because its physical dimension is large, center of gravity is low, quality is large, based on detrusion under geological process, belongs to heavy dwarf forms equipment.Through simulation calculation, when an earthquake occurs, the fuel tank of transformer can have larger amplification to seismic wave, general amplification coefficient gets 2 times, such as, horizontal acceleration under 8 degree of earthquakes is 0.2g (g is wherein acceleration of gravity, lower same), then the horizontal acceleration produced at top of oil-tank can reach 0.4g.But the high pressure on current 500kY transformer, the low-tension bushing antidetonation level in upright situation is about 0.3g, and the shock resistance of conservator is also about 0.3g.
Therefore, existing 500kY transformer and mounting means thereof are when reply such as 8 degree is to strenuous vibrations such as 9 degree of high earthquake intensities, comparatively severe safety test is caused undoubtedly to being arranged on the high pressure of transformer oil box top, low-tension bushing and conservator, such as when Wenchuan earthquake, the Yaan earthquake of China, the problems such as strenuous vibration high pressure, low-tension bushing and the conservator that result on a lot of transformer of burst breaks, damages, leakage of oil, cause transformer to have to long-time interruption maintenance, each side loss caused thus cannot accurately calculate especially.Through investigation, for the difficult problem that current transformer seismic vulnerability analysis is high, Ge great transformer production company both domestic and external cannot continue to improve by changing high pressure, low-tension bushing and conservator self structure the overall antidetonation level of transformer.
Summary of the invention
The technical problem to be solved in the present invention is: for prior art Problems existing, a kind of 500kY transformer isolation structure and installation method are provided, significantly improve the anti-seismic performance of transformer, reduce the seismic vulnerability analysis of this kind of important electric power facility of transformer, ensure the fail safe of transformer device structure system.
The technical problem to be solved in the present invention realizes by the following technical solutions: a kind of 500kY transformer isolation structure, comprises transformer, basis and several isolators, and the upper and lower two ends of described isolator are connected and fixed with the base of transformer, basis respectively.
Preferably, described isolator is made up of lower connecting plate, shock resistant damping element and antidetonation flexible member and upper junction plate, described antidetonation flexible member runs through shock resistant damping element, and the upper and lower two ends of antidetonation flexible member are interconnected with upper junction plate, lower connecting plate respectively, described upper junction plate is connected with the base of transformer, and described lower connecting plate is connected with basis.
Preferably, the sandwich that described shock resistant damping element is made up of rubber and steel plate, internal layer is steel plate, and skin is rubber.
Preferably, described antidetonation flexible member is spring or lead for retractable pencil.
Preferably, described isolator arranges 6-12, and the distribution of the base of ring transformer.
An installation method for 500kY transformer isolation structure, comprises the steps:
1st step, connecting elements is installed on basis;
2nd step, is connected and fixed bottom isolator with connecting elements;
3rd step, is placed on isolator top by transformer, its base and isolator are connected and fixed.
Preferably, described connecting elements is fixedly connected with integral with long nut by pre-buried planar plate members, and long nut is positioned at basic internal.
Preferably, described connecting elements is anchor bolt, and the threaded portion of described anchor bolt exposes to basis.
Compared with prior art, the invention has the beneficial effects as follows: by installing some isolators between transformer and basis, transformer body and base isolation are come, when meeting with the sharp poundings such as earthquake when transformer, transformer can be made and the earthquake ground motion of destruction may be caused to separate, cut off the route of transmission of seismic energy, minimizing is delivered to transformer top easily worn part as bushing as far as possible, conservator, seismic energy on low-tension bushing etc., offset the amplification of fuel tank itself, therefore, drastically increase the shock resistance of transformer, even if ensure that transformer also can safe operation in 8 degree to 9 degree high earthquake intensity areas, and, under the extraneous load action such as wind load under normal circumstances, transformer also can keep normal usage function.
Accompanying drawing explanation
Fig. 1 is the front view of a kind of 500kY transformer of the present invention isolation structure.
Fig. 2 is the end view of a kind of 500kY transformer of the present invention isolation structure.
Fig. 3 is concrete structure figure and the mounting means schematic diagram of isolator in Fig. 1.
Fig. 4 is the mounting arrangement schematic diagram of isolator in Fig. 1.
Fig. 5 is the front view of pre-buried planar plate members in Fig. 3.
Fig. 6 be in Fig. 5 B-B to cutaway view.
Fig. 7 is the front view of lower connecting plate in Fig. 3.
Fig. 8 be in Fig. 7 A-A to cutaway view.
Fig. 9 is the front view of upper junction plate in Fig. 3.
Figure 10 is the vertical view of upper junction plate in Fig. 3.
Mark in figure: 1-transformer, 2-basis, 3-isolator, 4-oil sump, 5-connecting bolt, the pre-buried planar plate members of 6-, 7-anchor bolt, 8-long nut, 9-through hole, 11-base, 12-fuel tank, 13-raises seat, 14-bushing, 15-conservator, 16-radiator, 17-low-tension bushing, 31-lower connecting plate, 32-shock resistant damping element, 33-upper junction plate, 34-antidetonation flexible member.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with the drawings and specific embodiments, the present invention is described in detail.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
A kind of 500kY transformer isolation structure as shown in Figure 1 and Figure 2, comprise transformer 1, basis 2 and isolator 3, transformer 1 wherein forms primarily of base 11, fuel tank 12, iron core, winding coil, rising seat 13, bushing 14 and conservator 15, radiator 16 and low-tension bushing 17, described rising seat 13, bushing 14, conservator 15 and low-tension bushing 17 are all positioned at fuel tank 12 top, described iron core, winding coil are arranged in fuel tank 12, and radiator 16 is arranged on fuel tank 12 sidewall.Described base 11 is positioned at bottom fuel tank 12, isolator 3 top.Oil sump 4 is set in basic 2 surroundings, when transformer 1 breaking out of fire or interruption maintenance, the oil plant in fuel tank 12 can be discharged in oil sump 4, then be disposed to given place from oil sump 4.The two ends up and down of described isolator 3 are connected and fixed with the base 11, basic 2 of transformer 1 respectively, the quantity of isolator 3 is arranged between 6-12, usually even number is set, such as 6,8,10,12, the quantity of the isolator 3 in the present embodiment is 10, and with the center of base 11 for symmetrical centre ring base 11 is uniformly distributed, as shown in Figure 4.Be conducive to transformer 1 like this in strenuous vibration process, alleviate the seismic energy and geological process power that transformer 1 body bears, reduce the possibility that transformer 1 body interior element destroys, thus improve the fail safe of transformer seismic isolation structure system.
The structure of described isolator 3 as shown in Figure 3, forms primarily of lower connecting plate 31, shock resistant damping element 32 and antidetonation flexible member 34 and upper junction plate 33, and described lower connecting plate 31 is square plate, it offers several through holes 9, as shown in Figure 7, Figure 8.Described shock resistant damping element 32 is in corrugated laminated construction, and between upper junction plate 33 and lower connecting plate 31, the sandwich that shock resistant damping element 32 is normally made up of rubber and steel plate, internal layer is steel plate, and skin is rubber.Described antidetonation flexible member 34 is in cylindric, and be positioned at the center of isolator 3 and run through shock resistant damping element 32, its upper and lower two ends are interconnected with upper junction plate 33, lower connecting plate 31 respectively; Usually, described antidetonation flexible member 34 adopts spring or lead for retractable pencil.Described upper junction plate 33 is square plate, it is offered several through holes 9, as shown in Figure 9, Figure 10.
The installation method of 500kY transformer isolation structure of the present invention, specifically comprises following content:
First, connecting elements is installed on basis 2.As shown in Figure 5, Figure 6, described connecting elements is fixedly connected with integral by pre-buried planar plate members 6 with long nut 8, and pre-buried planar plate members 6 is offered several through holes 9, and described long nut 8 to be fixedly connected on bottom pre-buried planar plate members 6 and through with through hole 9.As shown in Figure 3, pre-buried planar plate members 6 needs to be embedded in basis 2, its upper surface is usually concordant with basic 2 upper surfaces, so that lower connecting plate 31 is installed with aliging of pre-buried planar plate members 6, simultaneously, pre-buried planar plate members 6 can also increase the contact area bottom isolator 3 and between basis 2, thus improves the installation stability of transformer 1.It is inner that described long nut 8 is positioned at basis 2, here long nut 8 why is used, because consider that 500kY transformer belongs to heavy dwarf forms equipment, its physical dimension is large, center of gravity is low, quality is large, based on detrusion under geological process, employing long nut 8 can increase the part that is threaded between its with anchor bolt 7, thus plays reinforcement effect to transformer 1, is conducive to the shock resistance strengthening 500kY transformer isolation structure.
Next, the lower connecting plate 31 bottom isolator 3 and pre-buried planar plate members 6 are connected and fixed by anchor bolt 7, the threaded portion of anchor bolt 7 with form screw thread between long nut 8 and be flexibly connected, be fixedly connected on basic 2 by isolator 3 like this.
Then, transformer 1 is placed on isolator 3 top, is connected and fixed by connecting bolt 5 between its base 11 and upper junction plate 33 of isolator 3, so just transformer 1, isolator 3, basis 2 are connected in one.
It is pointed out that basis 2 on connecting elements is installed time, described connecting elements also can be anchor bolt 7.Anchor bolt 7 is embedded on basis 2, and makes the threaded portion of anchor bolt 7 expose to basis 2.When installing isolator 3, the lower connecting plate 31 of isolator 3 lower end is connected and fixed by anchor bolt 7, nut and basis 2, and now, threaded portion and the nut of anchor bolt 7 form screw thread and be flexibly connected, and both all expose to basis 2.Although this connected mode convenient disassembly, because screw thread kinematic coupling portion exposes to basis 2, in transformer 1 course of work, because of the sustained vibration of transformer 1 self, easily cause the part that is threaded to loosen.
Transformer 1 body and basis 2 are kept apart by arranging some isolators 3 between the base 11 and basis 2 of 500kY transformer 1 by the present invention, to change or to adjust dynamic characteristics or the dynamic action of transformer 1, the dynamic response of transformer 1 under geological process (acceleration, displacement) is made to obtain conservative control, it is make transformer 1 and the earthquake ground motion of destruction may be caused to separate in essence, cut off the route of transmission of seismic energy, reduce the seismic energy being delivered to transformer 1 top as far as possible, thus reduce the active force passing to transformer 1.Under the extraneous load action such as wind load under normal circumstances, transformer 1 can keep normal usage function.When occurring as more than 8 degree earthquakes, by the damping of isolator 3, the horizontal acceleration of the bushing 14 of transformer 1 top rapid wear, conservator 15, low-tension bushing 17 can be made to reduce about 50%, offset the amplification of fuel tank 12 2 times itself, therefore the shock resistance of transformer 1 can be improved about 1 times, ensure the safe operation being applied to 8 degree to 9 degree high earthquake intensity area 500kY transformers.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, it should be pointed out that all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a 500kV transformer isolation structure, comprise transformer (1) and basis (2), it is characterized in that: also comprise several isolators (3), described isolator (3) up and down two ends is connected and fixed with the base (11) of transformer (1), basic (2) respectively.
2. a kind of 500kV transformer isolation structure according to claim 1, it is characterized in that: described isolator (3) is by lower connecting plate (31), shock resistant damping element (32) and antidetonation flexible member (34) and upper junction plate (33) composition, described antidetonation flexible member (34) runs through shock resistant damping element (32), and antidetonation flexible member (34) up and down two ends respectively with upper junction plate (33), lower connecting plate (31) is interconnected, described upper junction plate (33) is connected with the base (11) of transformer (1), described lower connecting plate (31) is connected with basis (2).
3. a kind of 500kV transformer isolation structure according to claim 2, it is characterized in that: the sandwich that described shock resistant damping element (32) is made up of rubber and steel plate, internal layer is steel plate, and skin is rubber.
4. a kind of 500kV transformer isolation structure according to claim 2 or 3, is characterized in that: described antidetonation flexible member (34) is spring or lead for retractable pencil.
5. a kind of 500kV transformer isolation structure according to any one of claim 1-3, is characterized in that: described isolator (3) arranges 6-12, and the distribution of the base (11) of ring transformer (1).
6. an installation method for 500kV transformer isolation structure, is characterized in that: comprise the steps:
1st step, connecting elements is installed on basis (2);
2nd step, is connected and fixed isolator (3) bottom with connecting elements;
3rd step, is placed on isolator (3) top by transformer (1), and its base (11) and isolator (3) are connected and fixed.
7. the installation method of a kind of 500kV transformer isolation structure according to claim 6, it is characterized in that: described connecting elements is fixedly connected with integral by pre-buried planar plate members (6) with long nut (8), and long nut (8) is positioned at inside, basis (2).
8. the installation method of a kind of 500kV transformer isolation structure according to claim 6, it is characterized in that: described connecting elements is anchor bolt (7), the threaded portion of described anchor bolt (7) exposes to basis (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410680061.7A CN104376972A (en) | 2014-11-24 | 2014-11-24 | 500kV transformer shock insulation structure and installation method |
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| CN201410680061.7A CN104376972A (en) | 2014-11-24 | 2014-11-24 | 500kV transformer shock insulation structure and installation method |
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| CN104376972A true CN104376972A (en) | 2015-02-25 |
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Cited By (5)
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| CN105299132A (en) * | 2015-10-15 | 2016-02-03 | 中国电子工程设计院 | Mounting connecting part of micro-vibration active vibration isolating device and mounting method of mounting connecting part |
| CN105839974A (en) * | 2016-06-12 | 2016-08-10 | 东北电力大学 | Shock insulation device for high-voltage electrical equipment of transformer substation |
| CN106451146A (en) * | 2016-09-28 | 2017-02-22 | 中国电力科学研究院 | Installation method of shock isolation device for electrical equipment |
| CN106704471A (en) * | 2015-07-20 | 2017-05-24 | 贵阳供电局 | Vibration-isolating and energy-dissipating damping method and device for transformer |
| CN110688780A (en) * | 2019-10-17 | 2020-01-14 | 中国运载火箭技术研究院 | Novel buffer structure based on bionic principle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106704471A (en) * | 2015-07-20 | 2017-05-24 | 贵阳供电局 | Vibration-isolating and energy-dissipating damping method and device for transformer |
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| CN110688780A (en) * | 2019-10-17 | 2020-01-14 | 中国运载火箭技术研究院 | Novel buffer structure based on bionic principle |
| CN110688780B (en) * | 2019-10-17 | 2023-11-10 | 中国运载火箭技术研究院 | Novel buffer structure based on bionic principle |
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Address after: 610021 Dongfeng Road, Chengdu, Sichuan, No. 18, No. Applicant after: China Power Engineering Consulting Group Southwest Electric Power Design Institute Co., Ltd. Address before: 610021 Dongfeng Road, Chengdu, Sichuan, No. 18, No. Applicant before: Southwest Electric Power Design Institute of China Power Engineering Consulting Group Corporation |
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Free format text: CORRECT: APPLICANT; FROM: SOUTHWEST ELECTRIC POWER DESIGN INSTITUTE OF CHINA POWER ENGINEERING CONSULTING GROUP CORPORATION TO: CHINA POWER ENGINEERING CONSULTING GROUP SOUTHWEST ELECTRIC POWER DESIGN INSTITUTE CO., LTD. |
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Application publication date: 20150225 |