Special device for replacing disc insulator of isolated-phase enclosed bus of nuclear power plant

Abstract

The utility model discloses a special device for replacing a disc insulator of a nuclear power plant isolated-phase enclosed bus, which comprises a plate-shaped main body, the plate-shaped main body is provided with a first surface and a second surface which are opposite to each other, and the plate-shaped main body is provided with a first long-strip hole, a second long-strip hole, a third long-strip hole and a fourth long-strip hole at intervals; the first long-strip-shaped hole and the third long-strip-shaped hole are oppositely arranged, and the connecting line of the first long-strip-shaped hole and the third long-strip-shaped hole is a first connecting line. The second long-strip-shaped hole and the fourth long-strip-shaped hole are oppositely arranged, and the connecting line of the second long-strip-shaped hole and the fourth long-strip-shaped hole is a second connecting line. The first connecting line is perpendicular to the second connecting line. By applying the special device for replacing the isolated-phase bus disc insulator of the nuclear power plant, the disc insulator can be supported in a narrow equipment gap, the disc insulator can be effectively prevented from colliding with a closed bus conductor, a generator outgoing line sleeve and the like, and the disc insulator, the closed bus conductor and other parts are effectively protected.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power, in particular to a special device for replacing isolated-phase enclosed busbar disc insulators in a nuclear power plant. Background Art

[0002] The isolated-phase enclosed busbars of nuclear power plants are equipped with disc insulators on the generator side, the export voltage transformer side, and the main plant transformer side. The disc insulators are used to seal the enclosed busbars and maintain the insulation between the enclosed busbar conductor and the shell. The enclosed busbar needs to be replaced if it is damaged. The enclosed busbar disc insulator is a concentric ring structure, with the inner side in contact with the enclosed busbar conductor and the outer side in contact with the enclosed busbar shell. If the enclosed busbar disc insulator is damaged, the insulation may be reduced, the enclosed busbar conductor may be grounded, and further cause the unit to trip. Therefore, the enclosed busbar disc insulators need to be inspected in each round of overhaul and replaced if necessary.

[0003] Three disc insulators are set at the generator outlet, located at the bottom of the three-phase outgoing line compartment of the generator, used to separate the compartment of the generator outgoing line compartment from the closed busbar. The disc insulator is sleeved on the closed busbar conductor, supported by the closed busbar conductor on the inside, and supported by the boss on the outer shell on the outside. Each disc insulator is fixed by 20 bolts on the inside and 32 bolts on the outside. The bolts are fixed on the closed busbar conductor and the shell respectively. The closed busbar conductor has bolt holes, and the disc insulator is fixed by the thread. The outer shell bolt holes have no threads and only play a positioning role for the disc insulator.

[0004] The space inside the generator outlet compartment is narrow. The inner diameter of the disc insulator is about 700mm and the outer diameter is about 1400mm. The width of the door of the generator outlet compartment is smaller than the outer diameter of the disc insulator. The disc insulator needs to be placed diagonally to pass through the compartment door. In addition, the height inside the outlet compartment is limited. When replacing the disc insulator, the outlet compartment soft connection needs to be removed, and the disc insulator needs to be taken out from the gap between the generator outlet bushing and the closed bus conductor. It is impossible to use large lifting tools to replace the disc insulator in such a narrow space. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a special device for replacing the phase-isolated enclosed busbar disc insulator of a nuclear power plant.

[0006] The utility model solves the technical problem by adopting a technical solution: constructing a special device for replacing a phase-isolated enclosed busbar disc insulator of a nuclear power plant, comprising a plate-shaped body, the plate-shaped body having a first surface and a second surface opposite to each other, the plate-shaped body being provided with a first elongated hole, a second elongated hole, a third elongated hole, and a fourth elongated hole at intervals; the first elongated hole and the third elongated hole are arranged opposite to each other, and the first elongated hole and the third elongated hole are both extended in a first direction, and a line connecting the first elongated hole and the third elongated hole is a first line; the second elongated hole and the fourth elongated hole are arranged opposite to each other, and the second elongated hole and the fourth elongated hole are both extended in a second direction, and a line connecting the second elongated hole and the fourth elongated hole is a second line;

[0007] The first connection line is arranged perpendicular to the second connection line.

[0008] In some embodiments, the plate-shaped body includes a main body portion, and the circumferential side surfaces of the main body portion respectively extend outwardly with a first plate-shaped portion, a second plate-shaped portion, a third plate-shaped portion, and a fourth plate-shaped portion;

[0009] The first plate-shaped portion is disposed opposite to the third plate-shaped portion and both extend along the first direction; the second plate-shaped portion is disposed opposite to the fourth plate-shaped portion and both extend along the second direction;

[0010] The first plate-shaped portion is provided with the first elongated hole, the second plate-shaped portion is provided with the second elongated hole, the third plate-shaped portion is provided with the third elongated hole, and the fourth plate-shaped portion is provided with the fourth elongated hole.

[0011] In some embodiments, the first elongated hole, the second elongated hole, the third elongated hole, and the fourth elongated hole have the same structure.

[0012] In some embodiments, the first elongated hole, the second elongated hole, the third elongated hole, and the fourth elongated hole all include rectangular hole portions, and semicircular hole portions are respectively provided at both ends of the length direction of the rectangular hole portion.

[0013] In some embodiments, the length of the rectangular hole portion is 100 mm, and the diameter of the semicircular hole portion is 11 mm.

[0014] In some embodiments, the distance from the center point of the rectangular hole portion to the center point of the main body portion is 400 mm.

[0015] In some embodiments, the main body is a circular structure, and the diameter of the main body is 400 mm.

[0016] In some embodiments, the structures of the first plate-shaped portion, the second plate-shaped portion, the third plate-shaped portion, and the fourth plate-shaped portion are all the same.

[0017] In some embodiments, the distance from the round point of the main body to the outermost sides of the first plate-shaped portion, the second plate-shaped portion, the third plate-shaped portion, and the fourth plate-shaped portion is 1000 mm.

[0018] In some embodiments, the special device for replacing the isolated-phase enclosed busbar disc insulator of a nuclear power plant also includes a plurality of screws used to penetrate the first long hole, the second long hole, the third long hole, and the fourth long hole to connect with the screw holes of the isolated-phase enclosed busbar disc insulator.

[0019] The implementation of the utility model has the following beneficial effects: the application of the special device for replacing the phase-isolated enclosed bus disc insulator of a nuclear power plant can support the disc insulator in a narrow equipment gap, effectively prevent the disc insulator from colliding with the enclosed bus conductor and the generator outlet bushing, and effectively protect the disc insulator, the enclosed bus conductor and other components. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the utility model, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show certain embodiments of the utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0021] Figure 1 It is a structural schematic diagram of a special device for replacing a phase-isolated enclosed busbar disc insulator in a nuclear power plant in some embodiments of the utility model;

[0022] Figure 2 It is a schematic diagram of the dimensions of a special device for replacing a phase-isolated enclosed busbar disc insulator in a nuclear power plant in some embodiments of the utility model;

[0023] Figure 3 It is a schematic diagram of the application of a special device for replacing isolated-phase enclosed busbar disc insulators in a nuclear power plant in some embodiments of the utility model. DETAILED DESCRIPTION

[0024] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0025] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0026] In the following description, specific details such as specific system structures and technologies are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details that hinder the description of the present invention.

[0027] See also Figures 1 to 3The utility model shows a special device for replacing isolated-phase enclosed busbar disc insulators in a nuclear power plant, comprising a plate-like main body 10, the plate-like main body 10 having a first surface and a second surface opposite to each other, the plate-like main body 10 being provided with a first elongated hole 121, a second elongated hole 122, a third elongated hole 123, and a fourth elongated hole 124 spaced apart; the first elongated hole 121 and the third elongated hole 123 are arranged opposite to each other and the first elongated hole 121 and the third elongated hole 123 are both extended in the first direction, and the line connecting the first elongated hole 121 and the third elongated hole 123 is the first line; the second elongated hole 122 and the fourth elongated hole 124 are arranged opposite to each other and the second elongated hole 122 and the fourth elongated hole 124 are both extended in the second direction, and the line connecting the second elongated hole 122 and the fourth elongated hole 124 is the second line; the first line and the second line are arranged perpendicularly. Figure 1 As shown, the direction of the first connecting line is the same as the first direction, and the direction of the second connecting line is the same as the second direction. Therefore, the first direction is also perpendicular to the second direction.

[0028] In some embodiments, the plate-like body 10 includes a main body 11, and the circumferential side surfaces of the main body 11 respectively extend outwardly with a first plate-like portion 12, a second plate-like portion 13, a third plate-like portion 14, and a fourth plate-like portion 15, and the first plate-like portion 12, the second plate-like portion 13, the third plate-like portion 14, and the fourth plate-like portion 15 can all be long strip plate structures. The first plate-like portion 12 and the third plate-like portion 14 are arranged opposite to each other, and the first plate-like portion 12 and the third plate-like portion 14 are both extended along the first direction; the second plate-like portion 13 and the fourth plate-like portion 15 are arranged opposite to each other, and the second plate-like portion 13 and the fourth plate-like portion 15 are both extended along the second direction. The first plate-like portion 12 is provided with a first long strip hole 121, the second plate-like portion 13 is provided with a second long strip hole 122, the third plate-like portion 14 is provided with a third long strip hole 123, and the fourth plate-like portion 15 is provided with a fourth long strip hole 124. By adopting the structure of the plate-shaped main body 10, the dedicated device for replacing isolated-phase enclosed busbar disc insulators in a nuclear power plant can have a certain structural strength while having a relatively small structural weight, so as to facilitate transportation.

[0029] In some embodiments, the first elongated hole 121 , the second elongated hole 122 , the third elongated hole 123 , and the fourth elongated hole 124 have the same structure.

[0030] The first elongated hole 121 , the second elongated hole 122 , the third elongated hole 123 , and the fourth elongated hole 124 all include a rectangular hole portion 12 a , and semicircular hole portions 12 b are respectively disposed at both ends of the rectangular hole portion 12 a in the length direction.

[0031] In some embodiments, the length of the rectangular hole portion 12a is 100 mm, and the diameter of the semicircular hole portion 12b is 11 mm, which is the same as the width of the rectangular hole portion 12a. The diameter of the semicircular hole portion 12b is consistent with the diameter of the screw hole of the outer bolt of the disc insulator. When the disc insulator is replaced, the special device for replacing the phase-isolated closed busbar disc insulator of the nuclear power plant is installed above the disc insulator, the fixing bolts of the disc insulator are removed, and the screw rod 20 (or the top screw, the screw rod) is installed at the position of the rectangular hole portion 12a. The screw rod 20 (or the top screw, the screw rod) is inserted into the screw hole of the outer bolt of the disc insulator, and the disc insulator is supported by four screw rods 20 (or the top screw, the screw rod).

[0032] In some embodiments, the distance from the center point of the rectangular hole 12 a to the center point of the main body 11 is 400 mm.

[0033] In some embodiments, the main body 11 is a circular structure, and the diameter of the main body 11 is 400 mm.

[0034] In some embodiments, the structures of the first plate-shaped portion 12, the second plate-shaped portion 13, the third plate-shaped portion 14, and the fourth plate-shaped portion 15 are all the same, and the distance from the dot of the main body 11 to the outermost sides of the first plate-shaped portion 12, the second plate-shaped portion 13, the third plate-shaped portion 14, and the fourth plate-shaped portion 15 is 1000 mm. The width of the first plate-shaped portion 12, the second plate-shaped portion 13, the third plate-shaped portion 14, and the fourth plate-shaped portion 15 can all be 200 mm.

[0035] In some embodiments, the thickness of the plate-shaped body 10 is 10 mm.

[0036] In some embodiments, the plate-shaped body 10 is an integrated structure, and the plate-shaped body 10 may be made of a metal material, for example, the plate-shaped body 10 may be made of stainless steel to ensure that it has a certain rigidity.

[0037] The device for replacing isolated-phase enclosed busbar disc insulators in a nuclear power plant also includes a plurality of screws 20 for penetrating first, second, third and fourth elongated holes 121, 122, 123 and 124 to connect with the screw holes of the isolated-phase enclosed busbar disc insulators.

[0038] The application of the special device for replacing the phase-isolated enclosed busbar disc insulator of the nuclear power plant is as follows:

[0039] The fixing bolts on the disc insulator are loosened, and the special device for replacing the phase-separated closed bus disc insulator of the nuclear power plant is supported on the closed bus conductor 200. One end of the screw rod 20 (or the top screw, the lead screw) is inserted into the screw hole of the disc insulator. By rotating the screw rod 20, the screw rod 20 and the screw hole of the disc insulator 300 generate a force, and the disc insulator is propped up from the closed bus conductor 200 and the shell 100, so as to prevent the disc insulator 300 from colliding with the closed bus conductor 200.

[0040] After the disc insulator 300 is supported by the screw 20 (or the jackscrew, the lead screw) on site, a gap appears between the disc insulator 300 and the platform of the inner closed bus conductor 200 and the outer shell 100. A lifting tool can be installed in this gap to further lift the disc insulator 300 and then replace the disc insulator 300.

[0041] It can be understood that the special device for replacing the phase-isolated closed bus disc insulator of a nuclear power plant can support the disc insulator 300 in the narrow equipment gap, and can effectively prevent the disc insulator 300 from colliding with the closed bus conductor 200 and the generator outlet bushing, thereby effectively protecting the disc insulator 300, the closed bus conductor 200 and other components.

[0042] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the utility model. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.

Claims

1. A special device for replacing phase-isolated enclosed busbar disc insulators in a nuclear power plant, characterized in that: The invention comprises a plate-shaped body (10), wherein the plate-shaped body (10) has a first surface and a second surface opposite to each other, and the plate-shaped body (10) is provided with a first elongated hole (121), a second elongated hole (122), a third elongated hole (123), and a fourth elongated hole (124) arranged at intervals; the first elongated hole (121) and the third elongated hole (123) are arranged opposite to each other, and the first elongated hole (121) and the third elongated hole (123) are both extended in a first direction, and a line connecting the first elongated hole (121) and the third elongated hole (123) is a first line; the second elongated hole (122) and the fourth elongated hole (124) are arranged opposite to each other, and the second elongated hole (122) and the fourth elongated hole (124) are both extended in a second direction, and a line connecting the second elongated hole (122) and the fourth elongated hole (124) is a second line; The first connection line is arranged perpendicular to the second connection line.

2. The device for replacing isolated-phase enclosed busbar disc insulators in a nuclear power plant according to claim 1 is characterized in that: The plate-shaped body (10) comprises a main body portion (11), and the circumferential side surfaces of the main body portion (11) respectively extend outwardly to form a first plate-shaped portion (12), a second plate-shaped portion (13), a third plate-shaped portion (14), and a fourth plate-shaped portion (15); The first plate-shaped portion (12) and the third plate-shaped portion (14) are arranged opposite to each other, and the first plate-shaped portion (12) and the third plate-shaped portion (14) are both extended along the first direction; the second plate-shaped portion (13) and the fourth plate-shaped portion (15) are arranged opposite to each other, and the second plate-shaped portion (13) and the fourth plate-shaped portion (15) are both extended along the second direction; The first plate-shaped portion (12) is provided with the first elongated hole (121), the second plate-shaped portion (13) is provided with the second elongated hole (122), the third plate-shaped portion (14) is provided with the third elongated hole (123), and the fourth plate-shaped portion (15) is provided with the fourth elongated hole (124).

3. The device for replacing isolated-phase enclosed busbar disc insulators in a nuclear power plant according to claim 2 is characterized in that: The first elongated hole (121), the second elongated hole (122), the third elongated hole (123), and the fourth elongated hole (124) have the same structure.

4. The device for replacing isolated-phase enclosed busbar disc insulators in a nuclear power plant according to claim 3 is characterized in that: The first elongated hole (121), the second elongated hole (122), the third elongated hole (123), and the fourth elongated hole (124) all comprise a rectangular hole portion (12a), and semicircular hole portions (12b) are respectively provided at both ends of the rectangular hole portion (12a) in the length direction.

5. The device for replacing isolated-phase enclosed busbar disc insulators in a nuclear power plant according to claim 4 is characterized in that: The length of the rectangular hole portion (12a) is 100 mm, and the diameter of the semicircular hole portion (12b) is 11 mm.

6. The device for replacing isolated-phase enclosed busbar disc insulators in a nuclear power plant according to claim 5 is characterized in that: The distance from the center point of the rectangular hole portion (12a) to the center point of the main body portion (11) is 400 mm.

7. The device for replacing isolated-phase enclosed busbar disc insulators in a nuclear power plant according to claim 6 is characterized in that: The main body (11) is a circular structure, and the diameter of the main body (11) is 400 mm.

8. The device for replacing isolated-phase enclosed busbar disc insulators in a nuclear power plant according to any one of claims 2 to 7, characterized in that: The structures of the first plate-shaped portion (12), the second plate-shaped portion (13), the third plate-shaped portion (14), and the fourth plate-shaped portion (15) are all the same.

9. The device for replacing isolated-phase enclosed busbar disc insulators in a nuclear power plant according to any one of claims 2 to 7, characterized in that: The distances from the point of the main body (11) to the outermost sides of the first plate-shaped portion (12), the second plate-shaped portion (13), the third plate-shaped portion (14), and the fourth plate-shaped portion (15) are all 1000 mm.

10. The device for replacing isolated-phase enclosed busbar disc insulators in a nuclear power plant according to any one of claims 2 to 7, characterized in that: The nuclear power plant phase-isolated enclosed busbar disc insulator replacement device also includes a plurality of screw rods used to penetrate the first long hole (121), the second long hole (122), the third long hole (123), and the fourth long hole (124) to connect with the screw holes of the phase-isolated enclosed busbar disc insulator.

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