Voltage-withstanding insulation protection structure for branch wire rod of generator stator winding

Abstract

The utility model relates to the technical field of insulation protection at the position of a generator stator winding, in particular to a voltage-withstanding insulation protection structure for a branch wire rod of the generator stator winding, which structurally comprises an upper plate, a middle plate and a lower plate which are mutually spliced to form an I-shaped structure, the stator winding branch wire rod comprises an A-phase wire rod and a B-phase wire rod which are arranged between the upper plate and the lower plate, and the middle plate passes through the space between the A-phase wire rod and the B-phase wire rod; the stator winding branch bar further comprises a C-phase bar located below the lower plate. The upper plate, the middle plate and the lower plate are arranged to form constraint cooperation on the A-phase bar, the B-phase bar and the C-phase bar, the voltage-resistant insulation requirements of the branch bars of the generator stator winding can be met, when the protection structure is arranged, the three-phase bars can keep the stability of the protection structure, the phenomenon that the upper plate, the middle plate and the lower plate fall off can be avoided, and the service life of the three-phase bar is prolonged. And the condition of insufficient insulation protection strength is also avoided, so that the safety and the reliability of the protection structure are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of insulation protection at the stator winding of a generator, and particularly relates to a stator winding branch wire rod voltage-withstanding insulation protection structure of a generator. BACKGROUND

[0002] In a power system, the DC voltage of the electrical test of the stator winding of a generator reaches 2 times the rated voltage, and the stator winding branch needs to disconnect the copper braid soft connection between the equipment and the branch wire rod and install insulation protection devices at the equipment fracture and the ABC three-phase branch separately supported by a copper ring lead to assemble the lead-out position, so as to meet the requirements of the electrical test insulation spacing. At present, the insulation voltage-withstanding performance of the ordinary insulation protection sleeve is poor, and generally does not meet the requirements of the insulation voltage-withstanding grade. The ordinary insulation protection partition plate has the problems of short distance between the branch and the equipment fracture, difficulty in placing the branch wire rod protection partition plate, and even the phenomenon that the branch wire rod protection partition plate cannot be placed. Since the ABC three-phase branch is arranged in a "pin" shape, the conventional insulation protection plate is not stable enough to be placed and is easy to fall from the placement position, which poses a safety hazard of falling from a high place and hitting the personnel and equipment. The conventional insulation protection plate also has the phenomenon of being punctured by high voltage.

[0003] It can be seen that the current insulation protection plate needs to be improved and optimized, and an insulation protection plate structure that can effectively insulate and safely and stably insulate the branch is proposed. Therefore, a more reasonable technical solution is needed to solve the technical problems in the prior art. CONTENT OF THE UTILITY MODEL

[0004] The utility model provides a stator winding branch wire rod voltage-withstanding insulation protection structure, which solves the problems of the insufficient insulation spacing of the ABC three-phase branch of the stator winding of a generator in the background art and the instability of the placement of the ordinary insulation protection, and ensures the safety and efficiency of the electrical test. The insulation protection device structure is simple, complete and easy to process, which is beneficial to reducing the manual operation time and greatly improving the work efficiency.

[0005] In order to achieve the above purpose, the protection structure disclosed by the utility model can adopt the following technical solutions:

[0006] A stator winding branch wire rod voltage-withstanding insulation protection structure of a generator, which comprises an upper plate, a middle plate and a lower plate that are spliced into an I-shaped structure, wherein the stator winding branch wire rod comprises A-phase wire rods and B-phase wire rods arranged between the upper plate and the lower plate, and the middle plate passes through between the A-phase wire rods and the B-phase wire rods; the stator winding branch wire rod further comprises C-phase wire rods located below the lower plate.

[0007] The above-mentioned disclosed generator stator winding branch line rod voltage withstand insulation protection structure is combined to form an I-shaped structure by the upper plate, the middle plate and the lower plate, corresponds to the A-phase line rod, the B-phase line rod and the C-phase line rod arranged in a "pin" shape, and the left and right two spaces in the I-shaped structure correspond to the A-phase line rod and the B-phase line rod, and the lower surface of the lower plate corresponds to the C-phase line rod. After the left and right two spaces in the I-shaped structure are matched with the A-phase line rod and the B-phase line rod, the I-shaped structure can be limited to avoid falling; or the lower plate can avoid the I-shaped structure from falling after contacting the C-phase line rod, thereby ensuring the stability of the I-shaped structure. Furthermore, the I-shaped structure isolates the A-phase line rod, the B-phase line rod and the C-phase line rod, and the upper plate, the middle plate and the lower plate all adopt hard epoxy plates with a thickness of 10 mm, which can ensure sufficient insulation gap.

[0008] Further, when the upper plate, the middle plate and the lower plate are butt-jointed and assembled, the alignment can be strengthened in various ways considering the accuracy and stability of the overall butt joint, and the structure is not uniquely limited. Here, one feasible option is optimized and proposed: one side of the upper plate facing downward is provided with an upper plate groove, one side of the lower plate facing upward is provided with a lower plate groove, and the upper edge of the middle plate is embedded in the upper plate groove and the lower edge of the middle plate is embedded in the lower plate groove. When the above scheme is adopted, the upper plate groove and the lower plate groove are both straight groove structures, and the middle plate is clamped in for alignment and positioning.

[0009] Further, the connection and fixing structure of the upper plate and the middle plate can adopt various schemes, and the structure is not uniquely limited. Here, one feasible option is optimized and proposed: the upper plate is provided with two rows of corresponding upper plate holes, the middle plate is correspondingly provided with upper middle plate holes, and the upper plate holes and the upper middle plate holes are fixed by connecting pieces. When the above scheme is adopted, the connecting pieces pass through the upper plate holes and the upper middle plate holes, thereby realizing the connection and fixation of the upper plate and the middle plate.

[0010] Further, the connection and fixing structure of the middle plate and the lower plate can adopt various schemes, and the structure is not uniquely limited. Here, one feasible option is optimized and proposed: the lower plate is provided with two rows of corresponding lower plate holes, the middle plate is correspondingly provided with lower middle plate holes, and the lower plate holes and the lower middle plate holes are fixed by connecting pieces. When the above scheme is adopted, the connecting pieces pass through the lower plate holes and the lower middle plate holes, thereby realizing the connection and fixation of the lower plate and the middle plate.

[0011] Further, the connecting pieces are used to connect and fix the upper plate, the middle plate and the lower plate, and the connecting pieces can adopt various schemes, and the structure is not uniquely limited. Here, one feasible option is optimized and proposed: the connecting pieces include an insulating connecting belt. When the above scheme is adopted, the insulating connecting belt can adopt a plastic belt or a rubber belt.

[0012] Further, in some schemes, the connection and fixation of the upper plate, the middle plate and the lower plate can also be implemented by other schemes, and one of the optional schemes is that the upper plate and the lower plate are provided with a plurality of connecting clamping holes, and the middle plate is provided with connecting feet corresponding to the connecting clamping holes. When the above scheme is adopted, the connecting clamping holes can be independently arranged at intervals, or can be arranged as continuous long holes, and the connecting feet can be arranged as a plurality of separate connecting feet, or can be arranged as an integral connecting foot corresponding to the long hole.

[0013] Further, in order to maintain the stability of the upper plate, the middle plate and the lower plate when matched, the structure of the connecting part can be optimized, and the structure is not uniquely limited, and one of the optional schemes is that the support rib structure is formed between the upper plate and the middle plate and between the middle plate and the lower plate. When the above scheme is adopted, the support rib structure can be fixed or integrally formed with the middle plate, or can be fixed and formed with the upper plate or the lower plate.

[0014] Further, when the A-phase rod, the B-phase rod and the C-phase rod are arranged, the structure of the fixed connection can adopt various schemes, and the structure is not uniquely limited, and one of the optional schemes is that the A-phase rod, the B-phase rod and the C-phase rod are provided with an insulating protective plate, the insulating protective plate is provided with a plurality of protective plate fixing holes, and the protective plate fixing holes are provided with a fixed insulating band. When the above scheme is adopted, the fixed insulating band is arranged in the protective plate fixing hole, and the corresponding insulating protective plate and the rod are tied and fixed.

[0015] Further, when the protective structure is arranged, the relative positional relationship between the lower plate, the upper plate and the corresponding rod should be maintained, so that the relative position after arrangement is stable, and various schemes can be implemented, and one of the optional schemes is that the lower plate and the upper plate are provided with a deviation-preventing centering groove corresponding to the A-phase rod, the B-phase rod or the C-phase rod.

[0016] The above content discloses a pressure-resistant insulating protective structure, and the utility model also provides the corresponding insulating protection method, as follows:

[0017] A pressure-resistant insulating protection method for a generator stator winding branch rod adopts the pressure-resistant insulating protection device described above.

[0018] Compared with the prior art, some beneficial effects of the technical scheme of the utility model include:

[0019] The utility model discloses a set up upper plate, middle plate and lower plate form the constraint cooperation of A phase stick, B phase stick and C phase stick, can reach the withstand voltage insulation demand of generator stator winding branch stick, when setting up the stability of protection structure, three -phase stick is corresponding with upper plate, lower plate cooperation respectively, can keep the stability of protection structure, can avoid the phenomenon that upper plate, middle plate and lower board fall, also avoided the insufficient condition of insulation protection intensity, therefore improved the safety reliability of protection structure. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be briefly introduced to the drawing needed in the embodiment, it should be understood that the following drawings only shows some embodiments of the utility model, therefore should not be regarded as the limitation to the scope, for ordinary skilled person in the art, under the premise of not paying the creative labor, still can obtain other related drawings according to these drawings.

[0021] Figure 1 It is the overall schematic diagram of protection structure.

[0022] Figure 2 It is the structural schematic diagram of upper plate.

[0023] Figure 3 It is the structural schematic diagram of middle plate.

[0024] Figure 4 It is the structural schematic diagram of lower plate.

[0025] Figure 5 It is the structural schematic diagram of branch stick.

[0026] In the above drawing, the meaning of each mark is:

[0027] 1, upper plate;101, upper plate hole;102, upper plate groove;2, lower plate;201, lower plate hole;202, lower plate groove;3, middle plate;301, upper middle plate hole;302, lower middle plate hole;4, A phase stick;5, B phase stick;6, C phase stick;7, insulation protection plate;701, protection plate fixed hole;8, connecting piece;9, fixed insulation band. DETAILED DESCRIPTION

[0028] The embodiment will be further explained below in combination with the drawings and specific embodiments.

[0029] In view of the poor insulation protection effect of the generator stator winding stick in the prior art, and the instability of the protection plate structure and the safety hazard of falling, in the following embodiments, the branch stick includes A phase stick, B phase stick and C phase stick.

[0030] Embodiment 1

[0031] AsFigures 1-5 As shown in the drawings, the embodiment provides a kind of generator stator winding branch line rod pressure insulation protection structure, including the upper plate, middle plate and lower plate formed by splicing each other to form I-shaped structure, the stator winding branch line rod includes the A-phase line rod and B-phase line rod between the upper plate and lower plate, the middle plate passes between the A-phase line rod and B-phase line rod;Stator winding branch line rod also includes the C-phase line rod below lower plate.

[0032] The generator stator winding branch line rod pressure insulation protection structure disclosed in the embodiment, by the combination of upper plate, middle plate and lower plate to form I-shaped structure, corresponding to the A-phase line rod, B-phase line rod and C-phase line rod arranged in "pin" shape, the left and right two spaces in the I-shaped structure correspond to the A-phase line rod and B-phase line rod, and the lower surface of the lower plate corresponds to the C-phase line rod. Wherein, after the left and right two spaces in the I-shaped structure and the A-phase line rod and B-phase line rod are matched and contacted, the I-shaped structure can be limited to avoid falling; or the lower plate and the C-phase line rod can avoid the I-shaped structure from falling after being contacted, so as to ensure the stability of the I-shaped structure. Furthermore, the I-shaped structure isolates the A-phase line rod, B-phase line rod and C-phase line rod, and the upper plate, middle plate and lower plate are all made of hard epoxy plate with a thickness of 10 mm, which can ensure sufficient insulation gap.

[0033] When the upper plate, middle plate and lower plate are butt-jointed and assembled, considering the accuracy and stability of overall butt-joint, the alignment can be strengthened in various ways, and the structure is not uniquely limited. The embodiment is optimized and one of the feasible options is adopted: as shown in the drawings, Figure 2 As shown in the drawings, the upper plate is provided with an upper plate groove on the side facing downward, the lower plate is provided with a lower plate groove on the side facing upward, and the upper edge of the middle plate is embedded in the upper plate groove and the lower edge of the middle plate is embedded in the lower plate groove. When the above scheme is adopted, the upper plate groove and the lower plate groove are straight groove structures, and the middle plate is clamped in for alignment and positioning.

[0034] The connection and fixing structure of the upper plate and the middle plate can adopt various schemes, and the structure is not uniquely limited. The embodiment is optimized and one of the feasible options is adopted: as shown in the drawings, Figure 2 As shown in the drawings, the upper plate is provided with two rows of corresponding upper plate holes, and the middle plate is provided with upper middle plate holes on the upper side, and the upper plate holes and the upper middle plate holes are fixed by connecting pieces. When the above scheme is adopted, the connecting pieces pass through the upper plate holes and the upper middle plate holes, so as to realize the connection and fixation of the upper plate and the middle plate.

[0035] The connection and fixing structure of the middle plate and the lower plate can adopt various schemes, and the structure is not uniquely limited. The embodiment is optimized and one of the feasible options is adopted: as shown in the drawings, Figure 4As shown, the lower plate is provided with two rows of corresponding lower plate holes, and the middle plate is provided with lower middle plate holes corresponding to the lower plate holes, and the lower plate holes are fixed with the lower middle plate holes through connecting pieces. When the above scheme is adopted, the connecting pieces pass through the lower plate holes and the lower middle plate holes, thereby realizing the connection and fixation of the lower plate and the middle plate.

[0036] The connecting pieces are used to connect and fix the upper plate, the middle plate and the lower plate, and the connecting pieces can adopt various schemes, and the structure is not uniquely limited. The embodiment is optimized and one of the feasible options is adopted: as shown in the figure, Figure 1 As shown, the connecting pieces include an insulating connecting belt. When the above scheme is adopted, the insulating connecting belt can be a plastic belt or a rubber belt.

[0037] When the A-phase rod, the B-phase rod and the C-phase rod are arranged, the structure of the fixed connection can adopt various schemes, and the structure is not uniquely limited. The embodiment is optimized and one of the feasible options is adopted: the A-phase rod, the B-phase rod and the C-phase rod are provided with an insulating protective plate, the insulating protective plate is provided with a plurality of protective plate fixing holes, and the protective plate fixing holes are provided with a fixed insulating belt. When the above scheme is adopted, the fixed insulating belt is arranged in the protective plate fixing hole to tightly fix the corresponding insulating protective plate and the rod.

[0038] When the protective structure is arranged, the relative position relationship between the lower plate, the upper plate and the corresponding rod should be maintained, so as to maintain the relative position stability after arrangement. Various schemes can be used to achieve this, and the embodiment adopts one of the feasible options: the lower plate and the upper plate are provided with a deviation-preventing centering groove, and the deviation-preventing centering groove is correspondingly matched with the A-phase rod, the B-phase rod or the C-phase rod.

[0039] Embodiment 2

[0040] The embodiment provides a generator stator winding branch rod pressure-resistant insulating protective structure, which is different from that in the embodiment 1 in that the connection and matching structure of the upper plate, the middle plate and the lower plate.

[0041] Specifically, in the embodiment, the connection and fixation of the upper plate, the middle plate and the lower plate can be realized by other schemes, and the embodiment adopts one of the options: the upper plate and the lower plate are provided with a plurality of connecting clamping holes, and the middle plate is provided with connecting feet (not shown in the figure) corresponding to the connecting clamping holes. When the above scheme is adopted, the connecting clamping holes can be independently arranged at intervals, or can be arranged as continuous long holes, and the connecting feet scheme can be provided with a plurality of separate connecting feet, or can be provided with an integral connecting foot corresponding to the long hole.

[0042] Embodiment 3

[0043] The embodiment provides a voltage-withstanding insulation protection structure of a branch line rod of a generator stator winding, which is different from that in the embodiment 1 in that a reinforcing and stabilizing structure is arranged at the connecting and fitting position of the upper plate, the middle plate and the lower plate.

[0044] Specifically, in the embodiment, in order to maintain the stability of the upper plate, the middle plate and the lower plate when being fitted, the structure of the connecting position is optimized, and the structure is not uniquely limited. The embodiment is optimized and one of feasible options is adopted, that is, support rib structures (not shown in the drawings) are formed between the upper plate and the middle plate and between the middle plate and the lower plate. When the above scheme is adopted, the support rib structure can be fixed with or integrally formed with the middle plate, or can be fixed and formed with the upper plate or the lower plate respectively.

[0045] Embodiment 4

[0046] The content of the above embodiments 1-3 discloses the voltage-withstanding insulation protection structure, and the embodiment provides the corresponding insulation protection method, as follows:

[0047] A voltage-withstanding insulation protection method of a branch line rod of a generator stator winding, which adopts the voltage-withstanding insulation protection structure in any one of the embodiments 1-3.

[0048] The above is the embodiment listed in the embodiment, but the embodiment is not limited to the above optional embodiment, and a person skilled in the art can obtain other various embodiments by arbitrarily combining the above modes. Any person can obtain other various forms of embodiments under the inspiration of the embodiment. The above specific embodiments should not be understood as the limitation of the protection scope of the embodiment, and the protection scope of the embodiment should be defined by the claims.

Claims

1. A withstand voltage insulation protection structure for branch bars of generator stator windings, characterized in that: The stator winding branch bars include an upper plate (1), a middle plate (3), and a lower plate (2) that are spliced ​​together to form an I-shaped structure. The stator winding branch bars include an A-phase bar (4) and a B-phase bar (5) disposed between the upper plate (1) and the lower plate (2). The middle plate (3) passes between the A-phase bar (4) and the B-phase bar (5). The stator winding branch bars also include a C-phase bar (6) located below the lower plate (2).

2. The generator stator winding branch bar withstand voltage insulation protection structure according to claim 1, characterized in that: The upper plate (1) has an upper plate groove (102) on the side facing downwards, the lower plate (2) has a lower plate groove (202) on the side facing upwards, the upper edge of the middle plate (3) is embedded in the upper plate groove (102), and the lower edge of the middle plate (3) is embedded in the lower plate groove (202).

3. The generator stator winding branch bar withstand voltage insulation protection structure according to claim 1, characterized in that: The upper plate (1) is provided with two rows of corresponding upper plate holes (101), and the middle plate (3) is provided with corresponding upper middle plate holes (301). The upper plate holes (101) and the upper middle plate holes (301) are fixed by connectors (8).

4. The generator stator winding branch bar withstand voltage insulation protection structure according to claim 1, characterized in that: The lower plate (2) is provided with two rows of corresponding lower plate holes (201), and the middle plate (3) is provided with corresponding lower middle plate holes (302). The lower plate holes (201) and the lower middle plate (3) are fixed by connectors (8).

5. The generator stator winding branch bar withstand voltage insulation protection structure according to claim 3 or 4, characterized in that: The connector (8) includes an insulating connecting strip.

6. The generator stator winding branch bar withstand voltage insulation protection structure according to claim 1, characterized in that: The upper plate (1) and the lower plate (2) are each provided with a number of connecting holes, and the middle plate (3) is provided with connecting feet that correspond to the connecting holes.

7. The generator stator winding branch bar withstand voltage insulation protection structure according to any one of claims 1 to 5, characterized in that: A supporting rib structure is formed between the upper plate (1) and the middle plate (3), and between the middle plate (3) and the lower plate (2).

8. The generator stator winding branch bar withstand voltage insulation protection structure according to claim 1, characterized in that: Insulating protective plates (7) are provided on the A-phase rod (4), B-phase rod (5) and C-phase rod (6). The insulating protective plates (7) are provided with a number of protective plate fixing holes (701), and a fixing insulating strip (9) is provided at the protective plate fixing holes (701).

9. The generator stator winding branch bar withstand voltage insulation protection structure according to claim 1, characterized in that: Both the lower plate (2) and the upper plate (1) are provided with anti-deviation centering grooves, which are matched with phase A rod (4), phase B rod (5) or phase C rod (6).

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