Simulation platform device for external insulation discharge test of transformer bushing

Abstract

The invention relates to a simulation platform device for an external insulation discharge test of a transformer bushing. The simulation platform device comprises a discharge platform, an oil tank body and a lifting mechanism, the oil tank body is located on the lower portion of the discharge platform, the bottom end of the oil tank body is fixed to the ground, test oil is contained in the oil tank body, the bottom end of the transformer bushing penetrates through the discharge platform to be inserted into the oil tank body and immersed in the test oil, the bottom end of the lifting mechanism is fixed to the ground, and the top end of the lifting mechanism is detachably connected with the bottom face of the discharge platform. The discharging platform can move relative to the oil tank body; the lifting mechanism drives the discharging platform to move so as to adjust the height of the discharging platform relative to the ground. On one hand, by arranging the discharge platform and the oil tank body, a transformer oil tank is effectively simulated, and the authenticity and reliability of transformer bushing external insulation gap discharge test simulation are improved; and on the other hand, the height of the discharge platform can be adjusted through the lifting mechanism, so that discharge voltages under different dry arc distances can be conveniently obtained through tests.

Description

Technical Field

[0001] The invention relates to the technical field of high voltage gap discharge, and in particular to a simulation platform device for transformer bushing external insulation discharge test. Background Art

[0002] At present, transformers are crucial equipment in power systems, which undertake the functions of stepping up and down the voltage of electric energy to adapt to the transmission and distribution of power at different voltage levels. Transformer bushings are an important component, which are used to insulate and support the conductive parts to ensure safe operation. The insulation design of bushings is generally divided into internal insulation and external insulation design methods. The internal insulation of transformer or reactor bushings generally adopts oil-impregnated paper capacitor cores, and the external insulation adopts porcelain hollow insulators; the internal insulation of GIS bushings generally adopts SF6 gas insulation structure, and the external insulation adopts composite hollow insulators and porcelain hollow insulators. The external insulation of bushings mainly considers the air gap distance required by the switching impact and the creepage distance required by the dirty external insulation. In the test, the discharge characteristics of the gap between the bushing end grading ring and the ground are tested. According to the 50% discharge voltage obtained in the test, the dry arc distance of the bushing is checked to see if it meets the tolerance requirements of the switching impact.

[0003] The existing bushing external insulation gap discharge characteristic test is often to discharge the end grading ring to the air gap of the oil tank. The upper end area of ​​the oil tank is small and cannot effectively simulate the upper surface of the transformer box, resulting in poor test equivalence. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a simulation platform device for transformer bushing external insulation discharge test, which has the advantage of being able to effectively simulate the transformer oil tank and improve the authenticity and reliability of the high-voltage bushing external insulation gap discharge test simulation.

[0005] The above-mentioned invention object of the present invention is achieved through the following technical scheme: a simulation platform device for transformer bushing external insulation discharge test, comprising a discharge platform, an oil tank body and a lifting mechanism; the oil tank body is located at the lower part of the discharge platform, the bottom end of the oil tank body is fixed on the ground, the oil tank body contains test oil, the bottom end of the transformer bushing passes through the discharge platform and is inserted into the oil tank body and immersed in the test oil, the bottom end of the lifting mechanism is fixed on the ground, the top end of the lifting mechanism is detachably connected to the bottom surface of the discharge platform, and the discharge platform can move relative to the oil tank body; the lifting mechanism drives the discharge platform to move to adjust the height of the discharge platform relative to the ground.

[0006] Preferably, in the simulation platform device for transformer bushing external insulation discharge test provided by the present invention, the discharge platform is made of a metal plate.

[0007] Preferably, in the simulation platform device for transformer bushing external insulation discharge test provided by the present invention, the lifting mechanism includes multiple lifts, multiple lifts are arranged at the bottom of the discharge platform, multiple lifts are arranged at circumferential intervals around the discharge platform, the top ends of multiple lifts are detachably connected to the bottom surface of the discharge platform, and the bottom ends of multiple lifts are fixedly connected to the ground; multiple lifts simultaneously push the discharge platform to move to adjust the height of the discharge platform relative to the ground.

[0008] Preferably, in the simulation platform device for transformer bushing external insulation discharge test provided by the present invention, the lifter adopts a scissor-type hydraulic lift platform.

[0009] Preferably, in the simulation platform device for transformer bushing external insulation discharge test provided by the present invention, the top end of the elevator is detachably connected to the bottom surface of the discharge platform via a connecting assembly.

[0010] Preferably, in the simulation platform device for transformer bushing external insulation discharge test provided by the present invention, the connecting assembly includes a clamping piece and a clamping block, the top of the clamping piece is welded to the bottom surface of the discharge platform, a clamping groove is provided on the side of the clamping piece away from the discharge platform, the bottom end of the clamping block is connected to the top end of the elevator, and the end of the clamping block away from the elevator is clamped in the clamping groove to connect the bottom end of the discharge platform with the top end of the elevator.

[0011] Preferably, in the simulation platform device for transformer bushing external insulation discharge test provided by the present invention, the clamping block includes a block body and a threaded rod, the bottom surface of the block body is connected to the top end of the threaded rod, the block body is adapted to the clamping groove, the block body is clamped in the clamping groove, and the bottom end of the threaded rod passes through the first nut and is connected to the through hole opened at the top end of the elevator and the second nut in sequence.

[0012] Preferably, in the simulation platform device for transformer bushing external insulation discharge test provided by the present invention, the elevator and the discharge platform are effectively grounded through copper wires or copper busbars.

[0013] Preferably, in the simulation platform device for transformer bushing external insulation discharge test provided by the present invention, the discharge platform is arranged parallel to the horizontal plane.

[0014] Preferably, the simulation platform device for transformer bushing external insulation discharge test provided by the present invention adjusts the dry arc distance of the transformer bushing by adjusting the height of the discharge platform relative to the ground, and obtains the discharge voltage at different dry arc distances through the external insulation discharge test.

[0015] In summary, the beneficial technical effects of the present invention are as follows: the simulation platform device for transformer bushing external insulation discharge test provided by the present application comprises a discharge platform, an oil tank body and a lifting mechanism; the oil tank body is located at the lower part of the discharge platform, the bottom end of the oil tank body is fixed on the ground, the oil tank body contains test oil, the bottom end of the transformer bushing passes through the discharge platform and is inserted into the oil tank body and immersed in the test oil, the bottom end of the lifting mechanism is fixed on the ground, the top end of the lifting mechanism is detachably connected to the bottom surface of the discharge platform, and the discharge platform can move relative to the oil tank body; the lifting mechanism drives the discharge platform to move to adjust the height of the discharge platform relative to the ground; on the one hand, by setting the oil tank body, so as to filter the oil and control the parameters of the oil tank body, the transformer oil tank is effectively simulated together with the discharge platform, thereby improving the authenticity and reliability of the transformer bushing external insulation gap discharge test simulation; on the other hand, by setting the lifting mechanism, the height of the discharge platform can be adjusted, so as to facilitate the discharge voltage at different dry arc distances obtained through the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of a simulation platform device for transformer bushing external insulation discharge test provided by an embodiment of the present invention.

[0017] Figure 2 It is a top view of a simulation platform device for transformer bushing external insulation discharge test provided by an embodiment of the present invention.

[0018] Figure 3 It is a front view of a connection component in a simulation platform device for transformer bushing external insulation discharge test provided by an embodiment of the present invention.

[0019] Figure 4 It is a schematic diagram of the connection structure between a discharge platform and a connection component in a simulation platform device for transformer bushing external insulation discharge test provided by an embodiment of the present invention.

[0020] In the figure, 1. simulation platform device; 10. discharge platform; 20. oil tank body; 30. lifter; 40. connection assembly; 41. snap-fit ​​part; 411. snap-fit ​​groove; 42. snap-fit ​​block; 421. block body; 422. threaded rod; 423. first nut; 424. second nut; 2. transformer bushing. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0022] Reference Figure 1 and Figure 2, a simulation platform device 1 for external insulation discharge test of transformer bushing 2 disclosed in the present invention, comprising a discharge platform 10, an oil tank body 20 and a lifting mechanism; the oil tank body 20 is located at the lower part of the discharge platform 10, the bottom end of the oil tank body 20 is fixed on the ground, the oil tank body 20 contains test oil, the bottom end of the transformer bushing 2 passes through the discharge platform 10 and is inserted into the oil tank body 20 and immersed in the test oil, the bottom end of the lifting mechanism is fixed on the ground, the top end of the lifting mechanism is detachably connected to the bottom surface of the discharge platform 10, and the discharge platform 10 can move relative to the oil tank body 20; the lifting mechanism drives the discharge platform 10 to move to adjust the height of the discharge platform 10 relative to the ground; on the one hand, by setting the oil tank body 20, so as to filter oil and control parameters of the oil tank body 20, the oil tank of the transformer is effectively simulated together with the discharge platform, thereby improving the authenticity and reliability of the simulation of the external insulation gap discharge test of the transformer bushing 2; on the other hand, by setting the lifting mechanism, the height of the discharge platform 10 can be adjusted, so as to facilitate the discharge voltage under different dry arc distances obtained through the test.

[0023] Specifically, the discharge platform 10 is arranged parallel to the horizontal plane, a through hole is opened on the discharge platform 10, the center line of the through hole is arranged perpendicular to the discharge platform 10, and the through hole is arranged corresponding to the oil tank body 20. During use, the bottom end of the transformer bushing 2 passes through the through hole and is inserted into the oil tank body 20 and immersed in the test oil.

[0024] Among them, the lifting mechanism drives the discharge platform 10 to move upward or downward. By adjusting the height of the discharge platform 10 relative to the ground, the dry arc distance of the transformer bushing 2 is adjusted. The discharge voltage under different dry arc distances is obtained through the external insulation discharge test, which provides data support for the external insulation design of the transformer bushing 2.

[0025] It should be noted that the oil tank 20 is not connected to the discharge platform 10 .

[0026] The simulation platform device 1 can be adjusted according to different transformer bushing 2 sizes, dry arc distances and installation configurations. The adaptability of the simulation platform helps to seamlessly integrate into various bushing discharge tests to ensure the best test results.

[0027] The discharge platform 10 is made of a metal plate. With this arrangement, the test is simple and practical, and the effect is relatively obvious.

[0028] Furthermore, in the present embodiment, the lifting mechanism includes a plurality of lifts 30, which are all disposed at the bottom of the discharge platform 10, and are spaced circumferentially around the discharge platform 10. The top ends of the plurality of lifts 30 are detachably connected to the bottom surface of the discharge platform 10, and the bottom ends of the plurality of lifts 30 are fixedly connected to the ground; the plurality of lifts 30 simultaneously push the discharge platform 10 to move so as to adjust the height of the discharge platform 10 relative to the ground; by arranging a plurality of lifts 30, the stability of the movement of the discharge platform 10 is improved in the process of driving the discharge platform 10 to rise or fall.

[0029] like Figure 1 As shown, in this embodiment, the number of the elevators 30 is 4. Of course, the number of the elevators 30 can also be two or six. In the implementation mode where the number of the elevators 30 is 4, the four elevators 30 are respectively arranged at the four corners of the discharge platform 10, and are arranged in pairs. The top ends of the four elevators 30 are detachably connected to the bottom surface of the discharge platform 10, and the bottom ends of the four elevators 30 are in contact with the ground.

[0030] For example, the lift 30 may adopt a scissor-type hydraulic lift platform. Of course, the lift 30 may also adopt a cylinder. In the implementation mode in which the lift 30 adopts a scissor-type hydraulic lift platform, the scissor-type hydraulic lift platform has the characteristics of stable lifting and wide application range; at the same time, it reduces the production cost of the simulation platform device 1, reduces the volume and weight, saves transportation costs, and reduces the difficulty of assembly.

[0031] It should be noted that the structure of the scissor-type hydraulic lifting platform is well known to those skilled in the art, and the structure of the scissor-type hydraulic lifting platform will not be described in detail herein.

[0032] The top of the lift 30 is detachably connected to the bottom surface of the discharge platform 10 via a connecting assembly.

[0033] Reference Figure 3 and Figure 4 As shown, in this embodiment, the connecting assembly 40 includes a clamping member 41 and a clamping block 42. The top of the clamping member 41 is welded to the bottom surface of the discharge platform 10. A clamping groove 411 is provided on the side of the clamping member 41 away from the discharge platform 10. The bottom end of the clamping block 42 is connected to the top of the elevator 30. The end of the clamping block 42 away from the elevator 30 is clamped in the clamping groove 411 to connect the bottom end of the discharge platform 10 with the top of the elevator 30.

[0034] Furthermore, in this embodiment, the clamping block 42 includes a block body 421 and a threaded rod 422, the bottom surface of the block body 421 is connected to the top of the threaded rod 422, the block body 421 is adapted to the clamping groove 411, the block body 421 is clamped in the clamping groove 411, and the bottom end of the threaded rod 422 passes through the first nut 423 and is connected to the through hole opened at the top of the elevator 30 and the second nut 424 in sequence.

[0035] Specifically, the center line of the threaded rod 422 is arranged perpendicular to the discharge platform 10 .

[0036] In this embodiment, the lift 30 and the discharge platform 10 are effectively grounded through copper wires or copper bars.

[0037] The use process of the simulation platform device 1 for the external insulation discharge test of the transformer bushing 2 provided in this embodiment is: the discharge platform 10 is lifted to a preset position by a lifting mechanism to adjust the height of the discharge platform 10, and then the dry arc distance of the transformer bushing 2 is adjusted, and the discharge voltage under different dry arc distances can be obtained through the external insulation discharge test. The simulation platform device 1 simplifies the test preparation process under different dry arc distances, the structural design is intuitive and convenient, and the discharge test simulation method is direct and efficient. At the same time, the simulation platform device 1 is easy to repair, maintain and replace, reducing the time and effort required for maintenance.

[0038] The present application provides a simulation platform device 1 for the transformer bushing 2 external insulation discharge test, comprising a discharge platform 10, an oil tank body 20 and a lifting mechanism; the oil tank body 20 is located at the lower part of the discharge platform 10, the bottom end of the oil tank body 20 is fixed on the ground, the oil tank body 20 contains test oil, the bottom end of the transformer bushing 2 passes through the discharge platform 10 and is inserted into the oil tank body 20 and immersed in the test oil, the bottom end of the lifting mechanism is fixed on the ground, the top end of the lifting mechanism is detachably connected to the bottom surface of the discharge platform 10, and the discharge platform 10 can move relative to the oil tank body 20; the lifting mechanism drives the discharge platform 10 to move to adjust the height of the discharge platform 10 relative to the ground; on the one hand, by setting the oil tank body 20, so as to filter the oil and control the parameters of the oil tank body 20, the transformer oil tank is effectively simulated together with the discharge platform, thereby improving the authenticity and reliability of the simulation of the transformer bushing 2 external insulation gap discharge test; on the other hand, by setting the lifting mechanism, the height of the discharge platform 10 can be adjusted, so as to facilitate the discharge voltage under different dry arc distances obtained through the test.

[0039] The simulation platform device 1 for the transformer bushing 2 external insulation discharge test provided by the present invention has the following advantages: the device has a simple structure, is easy to manufacture, is convenient to install, and has a low manufacturing cost.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0041] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A simulation platform device for transformer bushing external insulation discharge test, characterized in that: It includes a discharge platform, an oil tank body and a lifting mechanism; The oil tank is located at the lower part of the discharge platform, the bottom end of the oil tank is fixed on the ground, the oil tank contains test oil, the bottom end of the transformer bushing passes through the discharge platform and is inserted into the oil tank and immersed in the test oil, the bottom end of the lifting mechanism is fixed on the ground, the top end of the lifting mechanism is detachably connected to the bottom surface of the discharge platform, and the discharge platform can move relative to the oil tank; The lifting mechanism drives the discharge platform to move so as to adjust the height of the discharge platform relative to the ground.

2. The simulation platform device for transformer bushing external insulation discharge test according to claim 1, characterized in that: The discharge platform is made of a metal plate.

3. The simulation platform device for transformer bushing external insulation discharge test according to claim 1, characterized in that: The lifting mechanism includes a plurality of lifts, each of which is disposed at the bottom of the discharge platform, and each of which is spaced around the circumference of the discharge platform. The top ends of each of the lifts are detachably connected to the bottom surface of the discharge platform, and the bottom ends of each of the lifts are fixedly connected to the ground. A plurality of the elevators simultaneously push the discharge platform to move so as to adjust the height of the discharge platform relative to the ground.

4. The simulation platform device for transformer bushing external insulation discharge test according to claim 3 is characterized in that: The lift adopts a scissor-type hydraulic lift platform.

5. The simulation platform device for transformer bushing external insulation discharge test according to any one of claims 3-4, characterized in that: The top end of the lift is detachably connected to the bottom surface of the discharge platform via a connecting assembly.

6. The simulation platform device for transformer bushing external insulation discharge test according to claim 5, characterized in that: The connecting assembly includes a clamping piece and a clamping block. The top of the clamping piece is welded to the bottom surface of the discharge platform. A clamping groove is provided on the side of the clamping piece away from the discharge platform. The bottom end of the clamping block is connected to the top end of the elevator. One end of the clamping block away from the elevator is clamped in the clamping groove to connect the bottom end of the discharge platform with the top end of the elevator.

7. The simulation platform device for transformer bushing external insulation discharge test according to claim 6, characterized in that: The clamping block includes a block body and a threaded rod, the bottom surface of the block body is connected to the top end of the threaded rod, the block body is adapted to the clamping groove, the block body is clamped in the clamping groove, and the bottom end of the threaded rod passes through the first nut and is connected to the through hole opened at the top end of the elevator and the second nut in sequence.

8. The simulation platform device for transformer bushing external insulation discharge test according to claim 3, characterized in that: The elevator and the discharge platform are both effectively grounded through copper wires or copper bars.

9. The simulation platform device for transformer bushing external insulation discharge test according to claim 1, characterized in that: The discharge platform is arranged parallel to the horizontal plane.

10. The simulation platform device for transformer bushing external insulation discharge test according to claim 1, characterized in that: The dry arc distance of the transformer bushing is adjusted by adjusting the height of the discharge platform relative to the ground, and the discharge voltage under different dry arc distances is obtained through an external insulation discharge test.

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