CN114088989B - Insulation platform suitable for power transformer burst short circuit test - Google Patents
Insulation platform suitable for power transformer burst short circuit test Download PDFInfo
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- CN114088989B CN114088989B CN202111208938.9A CN202111208938A CN114088989B CN 114088989 B CN114088989 B CN 114088989B CN 202111208938 A CN202111208938 A CN 202111208938A CN 114088989 B CN114088989 B CN 114088989B
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- 238000012360 testing method Methods 0.000 title claims abstract description 47
- 238000009413 insulation Methods 0.000 title claims description 24
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 101
- 239000010959 steel Substances 0.000 claims abstract description 101
- 239000012212 insulator Substances 0.000 claims abstract description 77
- 239000000725 suspension Substances 0.000 claims abstract description 33
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 230000003068 static effect Effects 0.000 description 6
- 230000006378 damage Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000009666 routine test Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Bridges Or Land Bridges (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses an insulating platform suitable for a sudden short circuit test of a power transformer, which is characterized in that a top steel structure frame and a bottom steel structure foundation of the insulating platform are fixedly connected through a plurality of side steel structure fixing rods, the bottom surface of an insulating platform body is parallel to the top surface of a concrete base, a plurality of supporting insulators are fixed between the bottom surface of the insulating platform body and the top surface of the concrete base, the concrete base is fixed on the bottom steel structure foundation, side pull suspension insulators are arranged between the periphery of the insulating platform body and the corresponding side steel structure fixing rods respectively, the side pull suspension insulators between the insulating platform body and the corresponding side steel structure fixing rods have preset prestress, a temporary bridge is erected between the front side of the insulating platform body and the corresponding surface of the top steel structure frame, and the top surface of the insulating platform body and the temporary bridge top surface are provided with mutually communicated tracks. The invention provides powerful guarantee for the implementation of the short circuit bearing capacity test of the power transformer.
Description
Technical Field
The invention relates to the technical field of high-voltage electrical appliance tests, in particular to an insulating platform suitable for a sudden short circuit test of a power transformer.
Background
According to the fifth part of the national standard GB1094.5-2008 power transformer: the ability to withstand short circuits provides that the power transformer and its components and accessories are designed to withstand thermal and dynamic stabilization effects without damage under the effect of excessive currents caused by external short circuits. External shorts include three-phase shorts, interphase shorts, two-phase ground and relative ground faults. The current induced in the windings by these faults is called overcurrent.
The above national standard requires that the heat resistance of the transformer to withstand short circuits should be verified by means of calculation, requiring that the average temperature at any tapping point should not exceed a specified maximum value after a specified duration of current is applied to each winding. The dynamic stability of the transformer against short-circuits is mainly verified by tests. The following conditions are satisfied to qualify the short-circuit withstand test of the transformer.
1) The results of the short-circuit test and the measurement and inspection during the short-circuit test did not find any signs of failure;
2) Repeated insulation tests (if any) and other routine tests are acceptable, and lightning impulse tests (if any) are acceptable;
3) The core inspection does not find defects such as displacement, core chip movement, winding and deformation of connecting wires and supporting structures, or the core inspection does not find defects but is not obvious, so that the safe operation of the transformer is not endangered;
4) No trace of internal discharge was found;
5) After the test is finished, the difference between the reactance value of each phase short circuit expressed by ohm and the original value is not more than a (the determination of the value a is required to refer to the fifth part of the power transformer of national standard GB 1094.5-2008: ability to withstand short circuits).
However, in the actual test process, since the insulation level of the transformer coil to the housing (connected to the ground) is low, the discharge breakdown of the coil connected to the high voltage terminal to the housing is easily caused, and the overcurrent is not easy to reach the prescribed value described in the national standard. If the test can be carried out according to national standard requirements, the overcurrent can smoothly reach a specified value, the transformer coil is required to be ensured not to discharge the shell, and the shell of the tested transformer is only required to be supported in a grounding insulation manner in consideration of the voltage level, manufacturing difficulty and economy of the tested transformer, so that the shell of the transformer is in a suspension potential in the pressurizing process, and the possibility of discharge of a high-voltage end to the shell in the test is avoided.
In the early stage, the capacity of a domestic high-voltage laboratory is limited, so that the short-circuit bearing capacity of a power transformer of 220kV and above is not forcedly checked. At present, special requirements are made on the test, and only the calculation, design and manufacture of the power transformer can be synchronously verified and checked under domestic conditions; or the power transformer is transported to a very few foreign large laboratories such as KAMA in the netherlands for the examination of the test. However, with the rapid development of the power industry in China, the requirements for the short-circuit bearing capacity test of the power transformer are also increasing. Aiming at the situation that a mature special insulating platform for the short circuit bearing capacity test of the power transformer is not available in China temporarily, the special insulating platform for the short circuit bearing capacity test of the power transformer is necessary to design a special insulating platform which has high pertinence and can bear the load of the tested transformer and insulate the relation between the neutral point of the tested power transformer and the ground, is suitable for the special insulating platform for the short circuit bearing capacity test of the power transformer, provides a test foundation for the implementation of the short circuit bearing capacity test of the power transformer, and further improves the comprehensive strength of the high-voltage electrical appliance test in China.
Disclosure of Invention
The invention aims to provide an insulation platform suitable for a sudden short circuit test of a power transformer, and provides powerful guarantee for implementation of the short circuit bearing capacity test of the power transformer.
The invention provides an insulation platform suitable for a sudden short circuit test of a power transformer, which comprises a basic steel structure frame, side pull suspension insulators, an insulation platform body, support insulators and a concrete base, wherein the basic steel structure frame comprises a top steel structure frame, side steel structure fixing rods and a bottom steel structure foundation, the top steel structure frame and the bottom steel structure foundation are fixedly connected through a plurality of side steel structure fixing rods, the bottom surface of the insulation platform body is parallel to the top surface of the concrete base, a plurality of support insulators are fixed between the bottom surface of the insulation platform body and the top surface of the concrete base, the concrete base is fixed on the bottom steel structure foundation, the side pull suspension insulators are arranged between the periphery of the insulation platform body and the corresponding side steel structure fixing rods, the side pull suspension insulators between the insulation platform body and the corresponding side steel structure fixing rods have preset prestress, a temporary bridge is erected between the front side of the insulation platform body and the corresponding surface of the top steel structure frame, the top surface of the insulation platform body and the temporary bridge are provided with mutually communicated tracks, and the temporary bridge top surface is grounded.
The invention has the beneficial effects that:
1. The invention only needs to use the steel structure, the supporting insulator, the temporary bridge mechanism and other common materials on the market for guaranteeing the voltage resistance, the bearing structural members and the like, and reasonably combines, constructs and installs, thereby not only achieving the purpose of potential suspension of the transformer shell required in the test, but also meeting the requirement of the whole platform for bearing more than 500T, and providing an effective test platform for the short circuit bearing capacity test of the power transformer.
2. The cost of the combined units such as the steel structure, the supporting insulator, the temporary bridge mechanism and the like adopted by the invention is low, but the combined insulating platform not only can generate larger economic income by receiving the short-circuit bearing capacity test of the power transformer, but also has the key point of improving the comprehensive capacity of the high-voltage electric appliance test in China.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a cross-sectional view taken along A-A of FIG. 2;
FIG. 4 is a schematic diagram showing the connection of the support insulator to the concrete base in the present invention;
FIG. 5 is a schematic diagram of a connection of a side-pull suspension insulator according to the present invention;
Fig. 6 is a schematic perspective view of a side-pull suspension insulator according to the present invention;
FIG. 7 is a schematic view of the connection of the rigid support rods of the present invention;
Fig. 8 is a schematic perspective view of the rigid support bar of the present invention.
The novel foundation pit comprises a 1-original foundation pit inlet, a 2-temporary bridge, a 3-basic steel structure frame, a 3.1-top steel structure frame, a 3.2-side steel structure fixing rod, a 3.3-bottom steel structure base, a 4-side pull suspension insulator, a 4.1-insulator ball head, a 4.2-ball head connecting fitting, a 4.3-connecting plate, a 4.4-insulator ball socket, a 4.5-ball socket connecting fitting, a 4.6-web plate, a 4.7-three-position connecting plate, a 4.8-screw rod, a 5-rigid supporting rod, a 6-insulating platform body, a 7-supporting insulator, an 8-concrete base, a 9-track, a 10-bolt, a 11-foundation pit, a 12-insulator fixing base, a 13-web plate reinforcing rib and a 14-transverse reinforcing rib.
Detailed Description
The invention is described in further detail below with reference to the attached drawings and specific examples:
The utility model provides an insulating platform that is adapted to sudden short circuit test of power transformer and uses that shown in fig. 1 ~ 8, it includes basic steel structure frame 3, side suspension insulator 4, insulating platform body 6, support insulator 7 and concrete base 8, wherein, basic steel structure frame 3 includes top steel structure frame 3.1, side steel structure dead lever 3.2 and bottom surface steel structure basis 3.3, through many side steel structure dead levers 3.2 fixed connection between top steel structure frame 3.1 and the bottom surface steel structure basis 3.3, the bottom surface of insulating platform body 6 is parallel with the top surface of concrete base 8, be fixed with many support insulators 7 between the bottom surface of insulating platform body 6 and the top surface of concrete base 8, realize insulating platform body 6 and the isolation of concrete base 8, concrete base 8 is fixed on bottom surface steel structure basis 3.3, set up side suspension insulator 4 between side steel structure dead lever 3.2 respectively around insulating platform body 6, side suspension insulator 4 between insulating platform body 6 and the corresponding side steel structure dead lever 3.2 has the pre-set bridge pre-set top surface of insulator 4, the bridge top surface that corresponds to the top surface of insulating platform body 6 and the top surface of concrete base 8, the bridge 2 is formed in-bridge top surface and the bridge of the mutual experimental process is formed, the top surface of the bridge 9 is formed in the bridge of the bridge is formed to the bridge of the top surface is convenient to be connected with the top surface of the bridge between the insulating platform body 6 and the top surface is formed. The temporary bridge 2 not only bears static pressure generated during transportation, but also bears horizontal impulse generated during starting and stopping of the electric carrier vehicle, and meanwhile, seamless butt joint of a ground track and a platform track is realized. Because the span of the transportation direction exceeds 3 meters, the strength of the temporary bridge 2 has higher requirements, so that the platform is insulated from the ground when the short circuit bearing capacity of the power transformer is tested, the power transformer can be safely and effectively transported to the insulating platform, and the temporary bridge structure provides precondition for the smooth implementation of the test of the short circuit bearing capacity of the power transformer.
In the above technical solution, the track 9 of the temporary bridge 2 is used to communicate with the track 9 of the original pit inlet 1.
In the above technical scheme, because the replacement and maintenance of the supporting insulator 7 are relatively troublesome, and the static pressure bearing load is far greater than the actual running static pressure load, in order to play a double-insurance role, in order to prevent the supporting insulator 7 from bearing the damage stress as much as possible, the side surface of the insulating platform body 6 is provided with the rigid supporting rod 5 and the side-pull suspension insulator 4.
Two side-pull suspension insulators 4 are uniformly arranged between the front side of the insulating platform body 6 and the side steel structure fixing rods 3.2 on the front side of the foundation steel structure frame 3;
two side-pull suspension insulators 4 are uniformly arranged between the rear side of the insulating platform body 6 and the side steel structure fixing rods 3.2 at the rear side of the foundation steel structure frame 3;
Three side-pull suspension insulators 4 are uniformly arranged between the left side of the insulating platform body 6 and the side steel structure fixing rods 3.2 on the left side of the foundation steel structure frame 3;
Three side-pull suspension insulators 4 are uniformly arranged between the right side of the insulating platform body 6 and the side steel structure fixing rods 3.2 on the right side of the foundation steel structure frame 3.
Most of stress during transportation is applied to the side-pull insulator string, and the horizontal stress of the insulating platform body 6 is buffered. The main insulating support of the platform is ensured not to be damaged.
In the technical scheme, a rigid supporting rod 5 is arranged between the left side of the insulating platform body 6 and the corresponding surface of the top steel structure frame 3.1;
a rigid supporting rod 5 is also arranged between the right side of the insulating platform body 6 and the corresponding surface of the top steel structure frame 3.1.
In the above technical scheme, one end of the rigid support rod 5 is hinged with the side surface of the insulating platform body 6, the other end of the rigid support rod 5 is provided with a pin hole, the corresponding surface of the top steel structure frame 3.1 is also provided with a pin hole, and the bolt 10 is used for positioning the pin hole of the rigid support rod 5 and the pin hole on the corresponding surface of the top steel structure frame 3.1.
In the technical scheme, an insulator ball 4.1 at one end of the side-pull suspension insulator 4 is fixedly connected with a ball connecting fitting 4.2, a connecting plate 4.3 is fixed on a side steel structure fixing rod 3.2, and the ball connecting fitting 4.2 is hinged with the connecting plate 4.3;
The insulator ball socket 4.4 at the other end of the side-pull suspension insulator 4 is fixedly connected with a ball socket connecting fitting 4.5, the upper part of the insulating platform body 6 is fixedly provided with a web plate 4.6, the web plate 4.6 is fixedly connected with a three-position connecting plate 4.7 through two screw rods 4.8, and the ball socket connecting fitting 4.5 is hinged with the three-position connecting plate 4.7.
Each side-pulling suspension insulator 4 is formed by connecting 10 insulators in series (the insulator ball heads of adjacent insulators are fixedly connected with the insulator ball socket), and the technical parameters of the single-piece insulator are as follows: nominal creepage distance 460mm, rated electromechanical destruction load 420kN, lightning full wave impulse flashover voltage 140kV, power frequency flashover wet voltage: 53kV. When the side-pulling suspension insulator is installed, each group of side-pulling suspension insulators 4 is tensioned by 10 tons of prestress through a pulley mechanism, so that most of stress during transportation is applied to the side-pulling insulator strings, and the horizontal stress of the whole platform is buffered. The main insulating support of the platform is guaranteed not to be damaged, and once the side-pull insulator is damaged, the side-pull insulator is easy to replace.
In the above technical scheme, the ball joint connecting fitting 4.2 is hinged with the connecting plate 4.3 in the vertical direction, and the ball joint connecting fitting 4.5 is hinged with the three connecting plates 4.7 in the horizontal direction.
In the above technical scheme, the non-bearing area of the insulating platform body 6 is paved with a bearing type steel plate net, and an oil discharge channel is arranged in the insulating platform body 6 below the bearing type steel plate net. The oil is discharged and the anti-skid function is achieved when an accident happens conveniently, so that the operation safety of experimental personnel is ensured. The oil discharge channel rapidly discharges the oil on the surface, so that the insulation oil flowing down can not pollute the supporting insulator. The insulating platform body 6 is a steel platform, and has the following dimensions: 12.4m (L). Times.7.6 m (W). Times.1.13 m (H).
The risk that the oil tank is torn and damaged, oil sprays and even fires possibly results in the fault of the transformer test, because the large-scale power transformer oil tank is internally provided with insulating oil with the weight of hundreds of tons, once the oil leakage phenomenon often accompanies the height Wen Zhaohuo, in order to reduce the accident influence range, the oil staying on the surface needs to be rapidly discharged, the surface of the steel platform is required to have a better oil discharge channel, and the insulating oil flowing down can not pollute the supporting insulator.
The design of the bearing type steel plate net is adopted on the surface of the platform, so that the passing conditions of tire type automobiles such as forklifts and the like are met, and the transportation of accessories is conveniently prepared in the early stage of the test.
In the above technical solution, the foundation steel structure frame 3 is fixed in the foundation pit 11. The foundation steel structure frame 3 reinforces the H steel structure frame around the foundation pit 11 and performs angle plate welding fixation with surrounding embedded parts, so that the fixation of the side-pull insulator and the installation of the rigid support can be simultaneously satisfied. The main structure of the foundation steel structure frame 3 adopts a structure form that 400b national standard H-shaped steel is effectively welded with a foundation pre-embedded steel plate, two layers of I-shaped steel are transversely and vertically crossed, and the base is welded and fixed with the four side face reinforcing steel structures to form an integral foundation frame.
In the above technical scheme, the concrete base 8 is pre-embedded with an insulator fixing base 12, the bottom of the supporting insulator 7 is fixedly connected with the insulator fixing base 12 through bolts, and a web rib 13 and a transverse rib 14 are arranged in the insulator fixing base 12. The structure has enough vertical rigidity to bear vertical load, and can reliably transmit the pressure of the upper structure to the abutment, a rubber pad with the thickness of 10mm is arranged between the insulator and the adjusting base, the structure has good elasticity to adapt to the steering force of the top, and has larger shearing deformation to meet the horizontal displacement of the upper structure; the support insulators 7 have 233 pieces, and each support insulator 7 is guaranteed to have a detachable and replaceable space. The device is convenient for workers to go in and out for maintenance and repair. The two ends (i.e. front and back) of the access passage of the transformer are densely arranged, so that the bearing strength of the total load passing through the temporary bridge is ensured. The rated voltage of the single support insulator 7 is: 170kV, power frequency dry withstand voltage: 350kV, weight: 140kg, rated tensile failure load: 120kN, lightning impulse withstand: 700kV, creepage distance: 4250mm, rated bending failure load: 12.5kN, rated torsional failure load: 4kn.m, rated static pressure resistance: 590kN, total bending load of 233 x 12.5 kn= 2912.5kN, 291.25T, up to approximately 2 times the technical requirement of 150T. The static pressure load was 233×590 kn= 137470kN, 13747T. The static pressure resistance is far greater than the technical requirement.
In the technical scheme, the bottom surface steel structure foundation 3.3 is used for guaranteeing reliable connection and force transmission of the foundation bearing platform and the post insulator, the main structure of the bottom surface steel structure foundation 3.3 is integrally connected by adopting 400b national standard H-shaped steel, the bottom surface steel structure foundation 3.3 is effectively welded with the foundation embedded steel plate, and the bottom surface steel structure foundation 3.3 adopts a transverse and vertical crossed structure form of two layers of I-shaped steel. The bottom steel structure foundation 3.3 has the functions that: firstly, the insulator can be fixed through the bottom steel structure foundation 3.3; secondly, the integral height of the insulating platform can be adjusted according to the requirements through the bottom steel structure foundation 3.3; thirdly, the whole plane can be leveled during the processing technology of the bottom steel structure foundation 3.3, thereby ensuring the flatness of the insulating platform body 6.
Before the transformer short-circuit experiment is carried out by utilizing the invention, the transformer is transported to the insulating platform body 6 from the outside of the inlet of the original foundation pit through the temporary bridge 2 by the transport vehicle, when the transformer short-circuit experiment is prepared to be carried out, the temporary bridge 2 is removed, the rigid support rods 5 are retracted, the rigid support rods 5 are not connected with the top steel structure frame 3.1, and the sudden short-circuit experiment can be carried out on the transformer on the insulating platform body 6.
What is not described in detail in this specification is prior art known to those skilled in the art.
Claims (10)
1. The utility model provides an insulating platform that is adapted to power transformer burst short circuit test usefulness which characterized in that: the side-pulling suspension type concrete bridge comprises a foundation steel structure frame (3), a side-pulling suspension type insulator (4), an insulating platform body (6), a supporting insulator (7) and a concrete base (8), wherein the foundation steel structure frame (3) comprises a top steel structure frame (3.1), side steel structure fixing rods (3.2) and a bottom steel structure foundation (3.3), the top steel structure frame (3.1) and the bottom steel structure foundation (3.3) are fixedly connected through a plurality of side steel structure fixing rods (3.2), the bottom surface of the insulating platform body (6) is parallel to the top surface of the concrete base (8), a plurality of supporting insulators (7) are fixed between the bottom surface of the insulating platform body (6) and the top surface of the concrete base (8), the concrete base (8) is fixed on the bottom steel structure foundation (3.3), the side-pulling suspension type insulator (4) is arranged between the periphery of the insulating platform body (6) and the corresponding side steel structure fixing rods (3.2), the side-pulling suspension type insulator (4) between the insulating platform body (6) and the corresponding side steel structure fixing rods (3.2) is provided with a pre-set pre-stressed bridge body (4) between the insulating platform body (6) and the corresponding to the top surface of the corresponding steel structure (3.2), the insulating platform body (6) is provided with a pre-stressed bridge top surface (2), the temporary bridge (2) is grounded.
2. The insulation platform adapted for power transformer burst short circuit testing according to claim 1, wherein: the track (9) of the temporary bridge (2) is used for being communicated with the track (9) of the original foundation pit inlet (1).
3. The insulation platform adapted for power transformer burst short circuit testing according to claim 1, wherein: two side-pull suspension insulators (4) are uniformly arranged between the front side of the insulating platform body (6) and a side-surface steel structure fixing rod (3.2) at the front side of the foundation steel structure frame (3);
Two side-pull suspension insulators (4) are uniformly arranged between the rear side of the insulating platform body (6) and a side-surface steel structure fixing rod (3.2) at the rear side of the basic steel structure frame (3);
Three side-pull suspension insulators (4) are uniformly arranged between the left side of the insulating platform body (6) and a side-surface steel structure fixing rod (3.2) at the left side of the basic steel structure frame (3);
Three side-pull suspension insulators (4) are uniformly arranged between the right side of the insulating platform body (6) and the side steel structure fixing rods (3.2) on the right side of the foundation steel structure frame (3).
4. The insulation platform adapted for power transformer burst short circuit testing according to claim 1, wherein: a rigid supporting rod (5) is arranged between the left side of the insulating platform body (6) and the corresponding surface of the top steel structure frame (3.1);
A rigid supporting rod (5) is also arranged between the right side of the insulating platform body (6) and the corresponding surface of the top steel structure frame (3.1).
5. The insulation platform for power transformer burst short circuit test according to claim 4, wherein: one end of the rigid support rod (5) is hinged with the side face of the insulating platform body (6), a pin hole is formed in the other end of the rigid support rod (5), a pin hole is formed in the corresponding face of the top steel structure frame (3.1), and the bolt (10) is used for positioning the pin hole of the rigid support rod (5) and the pin hole in the corresponding face of the top steel structure frame (3.1).
6. The insulation platform adapted for power transformer burst short circuit testing according to claim 1, wherein: an insulator ball head (4.1) at one end of the side-pull suspension insulator (4) is fixedly connected with a ball head connecting fitting (4.2), a connecting plate (4.3) is fixed on a side steel structure fixing rod (3.2), and the ball head connecting fitting (4.2) is hinged with the connecting plate (4.3);
The insulator ball socket (4.4) at the other end of the side-pull suspension insulator (4) is fixedly connected with a ball socket connecting fitting (4.5), the upper part of the insulating platform body (6) is fixedly provided with a web plate (4.6), the web plate (4.6) is fixedly connected with a three-position connecting plate (4.7) through two screw rods (4.8), and the ball socket connecting fitting (4.5) is hinged with the three-position connecting plate (4.7).
7. The insulation platform for power transformer burst short circuit test of claim 6, wherein: the ball joint connecting fitting (4.2) is hinged with the connecting plate (4.3) in the vertical direction, and the ball joint connecting fitting (4.5) is hinged with the three connecting plates (4.7) in the horizontal direction.
8. The insulation platform for power transformer burst short circuit test of claim 6, wherein: the insulating platform body (6) is characterized in that a bearing type steel plate net is paved in a non-bearing area of the insulating platform body (6), and an oil discharge channel is arranged in the insulating platform body (6) below the bearing type steel plate net.
9. The insulation platform adapted for power transformer burst short circuit testing according to claim 1, wherein: the foundation steel structure frame (3) is fixed in the foundation pit (11).
10. The insulation platform adapted for power transformer burst short circuit testing according to claim 1, wherein: an insulator fixing base (12) is embedded in the concrete base (8), the bottom of the supporting insulator (7) is fixedly connected with the insulator fixing base (12) through bolts, and web reinforcing ribs (13) and transverse reinforcing ribs (14) are arranged in the insulator fixing base (12).
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CN204374235U (en) * | 2014-07-07 | 2015-06-03 | 苏州电器科学研究院股份有限公司 | Superhigh tension power transformer bears short-circuit capacity test insulated platform |
WO2017088307A1 (en) * | 2015-11-27 | 2017-06-01 | 国家电网公司 | High-voltage dc support insulator test apparatus, test system and test method |
CN206863164U (en) * | 2017-05-26 | 2018-01-09 | 江西省送变电建设公司 | A kind of suspension insulator pressure test frame |
CN207780162U (en) * | 2017-07-05 | 2018-08-28 | 国网甘肃省电力公司电力科学研究院 | A kind of insulator pressure test auxiliary device |
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2021
- 2021-10-18 CN CN202111208938.9A patent/CN114088989B/en active Active
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CN204374235U (en) * | 2014-07-07 | 2015-06-03 | 苏州电器科学研究院股份有限公司 | Superhigh tension power transformer bears short-circuit capacity test insulated platform |
WO2017088307A1 (en) * | 2015-11-27 | 2017-06-01 | 国家电网公司 | High-voltage dc support insulator test apparatus, test system and test method |
CN206863164U (en) * | 2017-05-26 | 2018-01-09 | 江西省送变电建设公司 | A kind of suspension insulator pressure test frame |
CN207780162U (en) * | 2017-07-05 | 2018-08-28 | 国网甘肃省电力公司电力科学研究院 | A kind of insulator pressure test auxiliary device |
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