A shielding cover for the upper structure of power transformers and reactors for high-voltage testing.

Abstract

The present invention relates to the technical field of shielding covers, and discloses an upper structural shielding cover for high-voltage tests of power transformers and reactors, comprising a supporting foot, two grounding components are arranged on the supporting foot, an annular hollow aluminum tube is arranged above the supporting foot, a first fixing rod, a second fixing rod and a third fixing rod are fixedly connected to the bottom of the annular hollow aluminum tube, and a first connecting rod is fixedly connected to the side where the first fixing rod and the second fixing rod are close to each other. The present invention has a simple structure and is easy to operate, solves the hidden dangers of corona and breakdown of external insulation of transformers and reactors during high-voltage tests, ensures the safety of power transformers and shunt reactors with voltage levels of kV and above, lightning impulse tests, induction withstand voltage, and induction withstand voltage tests with partial discharge measurement, and is safe and reliable for sampling, ensures the correctness of the test results, makes sampling work quick and convenient, and improves work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of shielding covers, in particular to an upper structural component shielding cover used for high voltage tests of power transformers and reactors. Background Art

[0002] A power transformer is a static electrical device that is used to convert an AC voltage (current) of a certain value into another or several voltages (currents) of different values ​​with the same frequency. A reactor is also called an inductor. When a conductor is energized, it will generate a magnetic field in the certain space it occupies, so all electrical conductors that can carry current have inductance in a general sense.

[0003] During the high-voltage test of power transformers and reactors, factors such as the tip of the external grounding component of the test product and the environmental humidity will cause the hidden danger of external insulation breakdown during the high-voltage test. In addition, it is unsafe to sample the test product and cannot prevent the insulating oil from being affected by the external environment, resulting in inaccurate test results. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an upper structural member shielding cover for high-voltage tests of power transformers and reactors, which solves the hidden dangers of external insulation corona and breakdown during high-voltage tests of transformers and reactors, ensures the safety of power transformers and shunt reactors with voltage levels of kV and above, lightning impulse tests, induced withstand voltage tests, and induced withstand voltage tests with partial discharge measurement, and has the advantages of safe and reliable sampling, ensuring the correctness of the test results, making sampling quick and convenient, and improving work efficiency. It solves the problem that during the high-voltage test of power transformers and reactors, factors such as the tip of the external grounding component of the test product and the environmental humidity will cause the hidden danger of external insulation breakdown in the high-voltage test, and the sampling of the test product is unsafe, and the insulating oil cannot be prevented from being affected by the external environment, resulting in inaccurate test results.

[0005] In order to achieve the above-mentioned solution to the hidden dangers of corona and breakdown of external insulation in high-voltage tests of transformers and reactors, ensure the safety of power transformers and shunt reactors with voltage levels of kV and above, lightning impulse tests, inductive withstand voltage tests, and inductive withstand voltage tests with partial discharge measurement, the sampling is safe and reliable, the correctness of the test results is guaranteed, the sampling work is quick and convenient, and the work efficiency is improved, the present invention provides the following technical solutions: a shielding cover for an upper structure for high-voltage tests of power transformers and reactors, comprising a supporting foot, two grounding components are arranged on the supporting foot, an annular hollow aluminum tube is arranged above the supporting foot, the bottom of the annular hollow aluminum tube is fixedly connected to a first fixing rod, a second fixing rod and a third fixing rod, the first fixing rod The rod and the second fixed rod are fixedly connected to the same first connecting rod on one side close to each other, and the second fixed rod and the third fixed rod are fixedly connected to the same second connecting rod on one side close to each other. The first fixed rod and the second fixed rod are both slidably connected with a telescopic mechanism, and the two telescopic mechanisms are both fixedly connected to the top of the supporting base. The bottom end of the third fixed rod is slidably connected to a limiting mechanism, and the limiting mechanism is fixedly connected to the top of the supporting base. The third fixed rod is slidably connected to an elastic fixing mechanism on a side away from the second fixed rod, and the elastic fixing mechanism is clamped with the limiting mechanism. The third fixed rod is slidably connected to a positioning mechanism on a side away from the second fixed rod, and an elastic stretching mechanism is fixedly connected to the positioning mechanism, and the elastic stretching mechanism is fixedly connected to the elastic fixing mechanism.

[0006] Preferably, the telescopic mechanism includes a telescopic rod, and the bottom ends of the first fixed rod and the second fixed rod are both provided with telescopic grooves, and the two telescopic rods are respectively slidably connected to the corresponding telescopic grooves, and the bottom ends of the two telescopic rods extend to the bottom of the corresponding first fixed rod and the second fixed rod respectively and are fixedly connected to the top of the supporting base.

[0007] Preferably, the limiting mechanism includes a limiting plate and a sliding block, a limiting groove is provided at the bottom end of the third fixed rod, and the limiting plate is slidably connected to the limiting groove, the bottom end of the limiting plate extends to the bottom of the third fixed rod and is fixedly connected to the top of the supporting base, a sliding groove is provided on the inner wall of one side of the limiting groove, and the sliding block is slidably connected to the sliding groove, and one end of the sliding block extends into the limiting groove and is fixedly connected to the limiting plate.

[0008] Preferably, the elastic fixing mechanism includes a fixing column, an elastic block and an elastic spring, a fixing hole is provided on a side of the third fixing rod away from the second fixing rod, the fixing hole is communicated with the limiting groove, and the fixing column is slidably connected to the fixing hole, a clamping groove is provided on a side of the limiting plate away from the sliding block, and one end of the fixing column is clamped in the clamping groove, an elastic groove is provided on the top of the fixing column, and the elastic block is slidably connected to the elastic groove, the top end of the elastic block extends into the fixing hole and is fixedly connected to the top inner wall of the fixing hole, one end of the elastic spring is fixedly connected to the elastic block, and the end of the elastic spring away from the elastic block is fixedly connected to one side inner wall of the elastic groove.

[0009] Preferably, the positioning mechanism includes a positioning plate and two reset blocks, a positioning groove is provided on the side of the third fixing rod away from the second fixing rod, and the positioning plate is slidably connected to the positioning groove, reset grooves are provided on the top inner wall and the bottom inner wall of the positioning groove, and the two reset blocks are respectively slidably connected to the corresponding reset grooves, and the ends of the two reset blocks close to each other extend into the positioning groove and are fixedly connected to the top and bottom of the positioning plate.

[0010] Preferably, the elastic stretching mechanism includes a stretching plate and a positioning spring, wherein a side of the stretching plate close to the third fixed rod is fixedly connected to an end of the positioning plate extending to the outside of the third fixed rod, the other end of the fixing column extends to the outside of the third fixed rod and is fixedly connected to the stretching plate, the positioning spring is slidably sleeved on the outside of the positioning plate, one end of the positioning spring is fixedly connected to a side of the stretching plate close to the third fixed rod, and an end of the positioning spring away from the stretching plate is fixedly connected to the third fixed rod.

[0011] Preferably, there are multiple card slots, and the multiple card slots are distributed at equal distances in the vertical direction on a side of the limiting plate away from the sliding block.

[0012] Compared with the prior art, the present invention provides an upper structural member shielding cover for high voltage testing of power transformers and reactors, which has the following beneficial effects:

[0013] 1. The upper structural shielding cover for high-voltage testing of power transformers and reactors is used to adjust the height of the annular hollow aluminum tube by setting the supporting foot, the grounding component, the annular hollow aluminum tube, the first fixing rod, the second fixing rod, the third fixing rod, the first connecting rod, the second connecting rod, the telescopic groove, the telescopic rod, the limit groove, the limit plate, the slide groove and the slide block;

[0014] 2. The shielding cover of the upper structure used for high-voltage test of power transformers and reactors solves the hidden dangers of corona and breakdown of external insulation in high-voltage test of transformers and reactors through the setting of fixing holes, fixing columns, card slots, elastic slots, elastic blocks, elastic springs, positioning slots, positioning plates, reset slots, reset blocks, stretching plates and positioning springs, ensures the safety of power transformers and shunt reactors with voltage levels of kV and above, lightning impulse tests, induction withstand voltage, and induction withstand voltage tests with partial discharge measurement, and the sampling is safe and reliable, ensuring the correctness of the test results and making the sampling work quick and convenient;

[0015] The invention has a simple structure and is easy to operate, and solves the hidden dangers of corona and breakdown of external insulation in high-voltage tests of transformers and reactors, ensures the safety of power transformers and shunt reactors with voltage levels of 1000 kV and above, lightning impulse tests, induced withstand voltage, and induced withstand voltage tests with partial discharge measurement, and the sampling is safe and reliable, ensuring the correctness of the test results, making the sampling work quick and convenient, and improving the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The main structural diagram of the upper structural shielding cover for high voltage testing of power transformers and reactors proposed for the invention;

[0017] Figure 2 A schematic diagram of the structure of part B of an upper structural shielding cover for high voltage testing of power transformers and reactors proposed for the invention;

[0018] Figure 3 A schematic diagram of the structure of part A of an upper structural shielding cover for high voltage testing of power transformers and reactors proposed for the invention;

[0019] Figure 4 The invention is a partial structural schematic diagram of an upper structural member shielding cover for high voltage testing of power transformers and reactors.

[0020] In the figure: 1 supporting foot, 2 grounding component, 3 annular hollow aluminum tube, 4 first fixing rod, 5 second fixing rod, 6 third fixing rod, 7 first connecting rod, 8 second connecting rod, 9 telescopic slot, 10 telescopic rod, 11 limiting slot, 12 limiting plate, 13 sliding slot, 14 sliding block, 15 fixing hole, 16 fixing column, 17 card slot, 18 elastic slot, 19 elastic block, 20 elastic spring, 21 positioning slot, 22 positioning plate, 23 reset slot, 24 reset block, 25 stretching plate, 26 positioning spring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-4, a shielding cover for an upper structure for high-voltage testing of a power transformer and a reactor, comprising a supporting foot 1, two grounding components 2 are arranged on the supporting foot 1, an annular hollow aluminum tube 3 is arranged above the supporting foot 1, a first fixing rod 4, a second fixing rod 5 and a third fixing rod 6 are fixedly connected to the bottom of the annular hollow aluminum tube 3, a first connecting rod 7 is fixedly connected to the side where the first fixing rod 4 and the second fixing rod 5 are close to each other, a second connecting rod 8 is fixedly connected to the side where the second fixing rod 5 and the third fixing rod 6 are close to each other, a telescopic mechanism is slidably connected to the first fixing rod 4 and the second fixing rod 5, and both telescopic mechanisms are fixedly connected to the top of the supporting foot 1, a limiting mechanism is slidably connected to the bottom end of the third fixing rod 6, and the limiting mechanism is fixedly connected to the top of the supporting foot 1, a side of the third fixing rod 6 away from the second fixing rod 5 is slidably connected to an elastic fixing mechanism, and the elastic fixing mechanism is clamped with the limiting mechanism, a side of the third fixing rod 6 away from the second fixing rod 5 is slidably connected to a positioning mechanism, an elastic stretching mechanism is fixedly connected to the positioning mechanism, and the elastic stretching mechanism is fixedly connected to the elastic fixing mechanism.

[0023] In the present invention, the telescopic mechanism includes a telescopic rod 10, and the bottom ends of the first fixed rod 4 and the second fixed rod 5 are both provided with telescopic grooves 9, and the two telescopic rods 10 are respectively slidably connected to the corresponding telescopic grooves 9, and the bottom ends of the two telescopic rods 10 extend to the bottom of the corresponding first fixed rod 4 and the second fixed rod 5 respectively and are fixedly connected to the top of the supporting foot 1.

[0024] In the present invention, the limiting mechanism includes a limiting plate 12 and a sliding block 14. A limiting groove 11 is provided at the bottom end of the third fixed rod 6, and the limiting plate 12 is slidably connected to the limiting groove 11. The bottom end of the limiting plate 12 extends to the bottom of the third fixed rod 6 and is fixedly connected to the top of the supporting foot 1. A sliding groove 13 is provided on the inner wall of one side of the limiting groove 11, and the sliding block 14 is slidably connected to the sliding groove 13. One end of the sliding block 14 extends into the limiting groove 11 and is fixedly connected to the limiting plate 12.

[0025] In the present invention, the elastic fixing mechanism includes a fixing column 16, an elastic block 19 and an elastic spring 20. A fixing hole 15 is provided on the side of the third fixing rod 6 away from the second fixing rod 5. The fixing hole 15 is communicated with the limiting groove 11, and the fixing column 16 is slidably connected to the fixing hole 15. A clamping groove 17 is provided on the side of the limiting plate 12 away from the slider 14, and one end of the fixing column 16 is clamped with the clamping groove 17. An elastic groove 18 is provided on the top of the fixing column 16, and the elastic block 19 is slidably connected to the elastic groove 18. The top of the elastic block 19 extends into the fixing hole 15 and is fixedly connected to the top inner wall of the fixing hole 15. One end of the elastic spring 20 is fixedly connected to the elastic block 19, and the end of the elastic spring 20 away from the elastic block 19 is fixedly connected to one side inner wall of the elastic groove 18.

[0026] In the present invention, the positioning mechanism includes a positioning plate 22 and two reset blocks 24. A positioning groove 21 is provided on the side of the third fixing rod 6 away from the second fixing rod 5, and the positioning plate 22 is slidably connected to the positioning groove 21. Reset grooves 23 are provided on the top inner wall and the bottom inner wall of the positioning groove 21, and the two reset blocks 24 are respectively slidably connected to the corresponding reset grooves 23. The ends of the two reset blocks 24 that are close to each other extend into the positioning groove 21 and are fixedly connected to the top and bottom of the positioning plate 22.

[0027] In the present invention, the elastic stretching mechanism includes a stretching plate 25 and a positioning spring 26. The side of the stretching plate 25 close to the third fixed rod 6 is fixedly connected to one end of the positioning plate 22 extending to the outside of the third fixed rod 6. The other end of the fixing column 16 extends to the outside of the third fixed rod 6 and is fixedly connected to the stretching plate 25. The positioning spring 26 is slidably sleeved on the outside of the positioning plate 22. One end of the positioning spring 26 is fixedly connected to the side of the stretching plate 25 close to the third fixed rod 6, and the end of the positioning spring 26 away from the stretching plate 25 is fixedly connected to the third fixed rod 6.

[0028] In the present invention, there are a plurality of slots 17, and the plurality of slots 17 are distributed at equal distances in the vertical direction on a side of the limiting plate (12) away from the slider (14).

[0029] In summary, when the upper structural member shielding cover for high-voltage testing of power transformers and reactors is used, the supporting foot 1 is placed on the upper part of the high-voltage test piece, and then the stretching plate 25 is pulled, and the stretching plate 25 stretches the positioning spring 26, and absorbs energy through the positioning spring 26. At the same time, the stretching plate 25 drives the positioning plate 22 to slide in the positioning groove 21, and the positioning plate 22 limits the stretching plate 25. At the same time, the two reset blocks 24 limit the positioning plate 22. At the same time, the stretching plate 25 drives the fixed column 16 to move, and the elastic block 19 limits the fixed column 16. At the same time, the elastic groove 18 compresses the elastic spring 20, and absorbs energy through the elastic spring 20, so that the fixed column 16 moves out of the card slot 17, and then the annular hollow aluminum tube 3 is pulled, and the annular hollow aluminum tube 3 drives the first fixed rod 4 and the second fixed rod 5 to move upward, and the two telescopic rods 10 limit the first fixed rod 4 and the second fixed rod 5. At the same time, the annular The annular hollow aluminum tube 3 drives the third fixing rod 6 to move, the limiting plate 12 limits the third fixing rod 6, and the slider 14 limits the limiting plate 12. When the height of the annular hollow aluminum tube 3 is adjusted to a position suitable for the appearance of the test piece, the stretching plate 25 is then released, and the fixing column 16 is snapped into the card slot 17 under the spring rebound force of the positioning spring 26 and the elastic spring 20, and the third fixing rod 6 is fixed, and the annular hollow aluminum tube 3 is fixed, and then the annular hollow aluminum tube 3 is reliably grounded through the grounding component 2, thereby solving the hidden dangers of external insulation corona and breakdown in high-voltage tests of transformers and reactors, ensuring the safety of power transformers and shunt reactors with voltage levels of 220kV and above, lightning impulse tests, induced withstand voltage, and induced withstand voltage tests with partial discharge measurement, and sampling is safe and reliable, ensuring the correctness of the test results, making sampling work quick and convenient, and improving work efficiency.

[0030] It should be noted that the term "comprises" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article, or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A shielding cover for an upper structure used for a high voltage test of a power transformer or a reactor, comprising a supporting foot (1), characterized in that: The support foot (1) is provided with two grounding components (2); an annular hollow aluminum tube (3) is provided above the support foot (1); a first fixing rod (4), a second fixing rod (5) and a third fixing rod (6) are fixedly connected to the bottom of the annular hollow aluminum tube (3); a first connecting rod (7) is fixedly connected to the side where the first fixing rod (4) and the second fixing rod (5) are close to each other; a second connecting rod (8) is fixedly connected to the side where the second fixing rod (5) and the third fixing rod (6) are close to each other; and a sliding member (2) is provided on the first fixing rod (4) and the second fixing rod (5). A telescopic mechanism is movably connected, and both telescopic mechanisms are fixedly connected to the top of the support foot (1); the bottom end of the third fixed rod (6) is slidably connected to the limiting mechanism, and the limiting mechanism is fixedly connected to the top of the support foot (1); the side of the third fixed rod (6) away from the second fixed rod (5) is slidably connected to an elastic fixing mechanism, and the elastic fixing mechanism is clamped with the limiting mechanism; the side of the third fixed rod (6) away from the second fixed rod (5) is slidably connected to a positioning mechanism, and the positioning mechanism is fixedly connected to an elastic stretching mechanism, and the elastic stretching mechanism is fixedly connected to the elastic fixing mechanism; The limiting mechanism comprises a limiting plate (12) and a sliding block (14); a limiting groove (11) is provided at the bottom end of the third fixing rod (6), and the limiting plate (12) is slidably connected to the limiting groove (11); the bottom end of the limiting plate (12) extends to below the third fixing rod (6) and is fixedly connected to the top of the supporting foot (1); a sliding groove (13) is provided on an inner wall of one side of the limiting groove (11), and the sliding block (14) is slidably connected to the sliding groove (13); one end of the sliding block (14) extends into the limiting groove (11) and is fixedly connected to the limiting plate (12); The elastic fixing mechanism comprises a fixing column (16), an elastic block (19) and an elastic spring (20); a fixing hole (15) is provided on a side of the third fixing rod (6) away from the second fixing rod (5); the fixing hole (15) is communicated with the limiting groove (11), and the fixing column (16) is slidably connected to the fixing hole (15); a clamping groove (17) is provided on a side of the limiting plate (12) away from the sliding block (14), and one end of the fixing column (16) is clamped with the clamping groove (17); an elastic groove (18) is provided on the top of the fixing column (16), and the elastic block (19) is slidably connected to the elastic groove (18); a top end of the elastic block (19) extends into the fixing hole (15) and is fixedly connected to the inner wall of the top of the fixing hole (15); one end of the elastic spring (20) is fixedly connected to the elastic block (19), and one end of the elastic spring (20) away from the elastic block (19) is fixedly connected to the inner wall of one side of the elastic groove (18); The elastic stretching mechanism comprises a stretching plate (25) and a positioning spring (26); a side of the stretching plate (25) close to the third fixing rod (6) is fixedly connected to an end of the positioning plate (22) extending to the outside of the third fixing rod (6); the other end of the fixing column (16) extends to the outside of the third fixing rod (6) and is fixedly connected to the stretching plate (25); the positioning spring (26) is slidably sleeved on the outside of the positioning plate (22); one end of the positioning spring (26) is fixedly connected to a side of the stretching plate (25) close to the third fixing rod (6); and an end of the positioning spring (26) away from the stretching plate (25) is fixedly connected to the third fixing rod (6).

2. The upper structural member shielding cover for high voltage test of power transformer and reactor according to claim 1, characterized in that: The telescopic mechanism comprises a telescopic rod (10), the bottom ends of the first fixed rod (4) and the second fixed rod (5) are both provided with telescopic grooves (9), and the two telescopic rods (10) are respectively slidably connected to the corresponding telescopic grooves (9), and the bottom ends of the two telescopic rods (10) respectively extend to the bottom of the corresponding first fixed rod (4) and the second fixed rod (5) and are fixedly connected to the top of the supporting foot (1).

3. The upper structural shielding cover for high voltage testing of power transformers and reactors according to claim 1, characterized in that: The positioning mechanism comprises a positioning plate (22) and two reset blocks (24); a positioning groove (21) is formed on a side of the third fixing rod (6) away from the second fixing rod (5); the positioning plate (22) is slidably connected to the positioning groove (21); reset grooves (23) are formed on the top inner wall and the bottom inner wall of the positioning groove (21); the two reset blocks (24) are respectively slidably connected to the corresponding reset grooves (23); the ends of the two reset blocks (24) close to each other extend into the positioning groove (21) and are fixedly connected to the top and bottom of the positioning plate (22).

4. The upper structural member shielding cover for high voltage testing of power transformers and reactors according to claim 1, characterized in that: The number of the card slots (17) is multiple, and the multiple card slots (17) are distributed at equal distances in the vertical direction on a side of the limit plate (12) away from the slider (14).

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