CN219606324U - Water collecting device for generator of nuclear power station - Google Patents

Abstract

The utility model discloses a water collecting device for a generator of a nuclear power station, which comprises a water collecting ring, wherein one end of the water collecting ring is connected with a water inlet pipeline, and the other end of the water collecting ring is connected with a water outlet pipeline; the connecting assembly comprises a first flange, a second flange and an insulating piece; a plurality of counter bores are formed in the side surface, facing the second flange, of the insulating part; the insulating assembly comprises an insulating sleeve and an insulating cushion block, the insulating sleeve penetrates through a flange hole of the second flange, and one end of the insulating sleeve stretches into the counter bore; the other end of the insulating sleeve is abutted against the insulating cushion block; the insulating piece and the insulating component are arranged at the water outlet pipeline, so that the insulating grade at the water outlet pipeline can be enhanced, the occurrence probability of safety accidents such as conduction and the like at the water outlet pipeline is reduced, and the personal safety of staff is ensured. One end of the insulating sleeve extends into the counter bore, so that the creepage distance can be increased, the insulating grade can be effectively improved, oil stains are blocked outside the insulating sleeve, and the anti-fouling performance is improved.

Description

Water collecting device for generator of nuclear power station

Technical Field

The utility model relates to the technical field of nuclear power, in particular to a water collecting device for a generator of a nuclear power station.

Background

Water cooling is a very popular cooling mode for a stator winding of a generator, and at present, a water collecting ring with an annular structure is often arranged on a cooling device of the generator of a nuclear power station so as to cool related equipment in the generator of the nuclear power station.

The water collecting ring is required to be insulated when the generator of the nuclear power station normally operates, and the water collecting ring is mainly used for guaranteeing the safety of personnel and equipment. The water collecting ring is close to the winding end of the generator, a plurality of temperature measuring elements are paved around the water collecting ring, if the insulation level is reduced, damage to the winding end of the stator or insulation breakdown of the insulation water conduit occurs to enable the water collecting ring to be electrified, and harm is caused to personnel and equipment on a temperature measuring loop. Therefore, an insulating structure is required to be connected to the flange of the catchment ring and the external water pipe in operation.

Disclosure of Invention

The utility model aims to provide a water collecting device for a generator of a nuclear power station.

The technical scheme adopted for solving the technical problems is as follows: a water catchment apparatus for a nuclear power plant generator is constructed, comprising:

the water collecting ring is characterized in that one end of the water collecting ring is connected with a water inlet pipeline, the other end of the water collecting ring is connected with a water outlet pipeline, and the water inlet pipeline and the water outlet pipeline are communicated with the inner cavity of the water collecting ring;

the connecting assembly comprises a first flange, a second flange and an insulating part, wherein the first flange is sleeved on one side, close to the water collecting ring, of the water outlet pipeline, the second flange is sleeved on one side, far away from the water collecting ring, of the water outlet pipeline, and the insulating part is sleeved on the water outlet pipeline and is abutted between the first flange and the second flange; a plurality of counter bores are formed in the side surface, facing the second flange, of the insulating part;

the insulation assembly comprises an insulation sleeve and an insulation cushion block, the insulation sleeve penetrates through a flange hole of the second flange, and one end of the insulation sleeve stretches into the counter bore; the other end of the insulating sleeve is abutted against the insulating cushion block;

the fastener comprises a plurality of bolts and a plurality of nuts, wherein the bolts sequentially penetrate through the insulating cushion block, the insulating sleeve, the insulating piece and the first flange, and the nuts are locked on the parts of the bolts protruding out of the first flange.

In some embodiments, the insulator is an annular block made of polytetrafluoroethylene material.

In some embodiments, the fastener further comprises a plurality of belleville washers disposed between the nut and the first flange.

In some embodiments, at least two dish-shaped washers are arranged between each nut and the first flange, and the two dish-shaped washers are spliced in opposite directions.

In some embodiments, the water collecting device for a nuclear power plant generator further comprises at least two sealing gaskets, wherein the at least two sealing gaskets are respectively embedded on the surfaces of the first flange and the second flange;

at least two sealing gaskets are abutted against the insulating piece, and at least two sealing gaskets are located on the inner side of the counter bore.

In some embodiments, the first flange and the second flange are stainless steel pieces, and the first flange is welded and fixed with the water outlet pipeline.

In some embodiments, a side of the insulating spacer facing the second flange is provided with a step wall, and one end of the insulating sleeve is abutted against the step wall.

In some embodiments, the difference between the distance between the bottom wall of the counterbore and the step wall and the length of the insulating sleeve is greater than 0 and less than or equal to 0.3 millimeters.

In some embodiments, a first groove is formed in the surface, abutting against the insulating piece, of the first flange, and the first groove is communicated to the outer circumferential surface of the first flange and the counter bore.

In some embodiments, a second groove is formed on the surface, abutting against the insulating piece, of the second flange, and the second groove is communicated to the outer circumferential surface of the second flange and the counter bore.

The implementation of the utility model has the following beneficial effects: this a catchment device for nuclear power station generator sets up insulating part and insulation component etc. in outlet conduit department, can strengthen the insulating grade of outlet conduit department, makes outlet conduit department reduce the probability that incident such as electric conduction takes place, ensures staff's personal safety, and can avoid influencing the steady operation of equipment such as electric current.

Wherein, insulating subassembly includes insulating sleeve, and this insulating sleeve passes the flange hole of second flange, and in this insulating sleeve's one end stretches into the counter bore, can improve creepage distance, and then effectively improve insulating grade, can keep off the greasy dirt in the insulating sleeve outside simultaneously, increase anti-soil property.

Drawings

In order to more clearly illustrate the technical solution of the present utility model, the following description will be given with reference to the accompanying drawings and examples, it being understood that the following drawings only illustrate some examples of the present utility model and should not be construed as limiting the scope, and that other related drawings can be obtained from these drawings by those skilled in the art without the inventive effort. In the accompanying drawings:

FIG. 1 is a schematic illustration of a water catchment apparatus for a nuclear power plant generator in some embodiments of the utility model;

FIG. 2 is a detailed view of the structure within the circle shown in FIG. 1;

FIG. 3 is a schematic view of the structure of an insulator in some embodiments of the utility model;

FIG. 4 is a cross-sectional view of the insulator of FIG. 3;

FIG. 5 is a schematic diagram of an insulating spacer according to some embodiments of the present utility model;

fig. 6 is a cross-sectional view of the insulating spacer of fig. 5.

Detailed Description

For a clearer understanding of technical features, objects and effects of the present utility model, a detailed description of embodiments of the present utility model will be made with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are configured and operated in specific directions based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model, and do not indicate that the apparatus or element to be referred to must have specific directions, and thus should not be construed as limiting the present utility model.

It should also be noted that unless explicitly stated or limited otherwise, terms such as "mounted," "connected," "secured," "disposed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or one or more intervening elements may also be present. The terms "first," "second," "third," and the like are used merely for convenience in describing the present utility model and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby features defining "first," "second," "third," etc. may explicitly or implicitly include one or more such features. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present utility model. It will be apparent, however, to one skilled in the art that the present utility model may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present utility model with unnecessary detail.

As shown in fig. 1 to 2, the present utility model discloses a water collecting device for a generator of a nuclear power station, which can be used for cooling water of a stator winding of the generator to pass through to form a cold water loop of the stator winding of the generator.

This a catchment device for nuclear power plant generator includes:

the water collecting ring 10, one end of the water collecting ring 10 is connected with a water inlet pipeline 11, the other end of the water collecting ring 10 is connected with a water outlet pipeline 12, and the water inlet pipeline 11 and the water outlet pipeline 12 are communicated with the inner cavity of the water collecting ring 10;

the connecting assembly 20 comprises a first flange 21, a second flange 22 and an insulating piece 23, wherein the first flange 21 is sleeved on one side of the water outlet pipeline 12 close to the water collecting ring 10, the second flange 22 is sleeved on one side of the water outlet pipeline 12 far away from the water collecting ring 10, and the insulating piece 23 is sleeved on the water outlet pipeline 12 and is abutted between the first flange 21 and the second flange 22; the side of the insulating member 23 facing the second flange 22 is formed with a plurality of counter bores 233;

the insulation assembly 30, the insulation assembly 30 includes an insulation sleeve 31 and an insulation cushion block 32, the insulation sleeve 31 is penetrated through a flange hole of the second flange 22, and one end of the insulation sleeve 31 extends into the counter bore 233, so that the creepage distance can be increased, the insulation grade can be further effectively improved, and meanwhile, oil stains can be blocked outside the insulation sleeve 31, and the anti-fouling performance is increased; the other end of the insulating sleeve 31 is abutted against the insulating cushion block 32;

the fastener 40 includes a plurality of bolts 41 and a plurality of nuts 42, the plurality of bolts 41 sequentially pass through the insulating spacer 32, the insulating bush 31, the insulating member 23 and the first flange 21, and the nuts 42 are locked to portions of the bolts 41 protruding from the first flange 21.

Understandably, the insulating piece 23, the insulating component 30 and the like are arranged at the water outlet pipeline 12, so that the insulating grade at the water outlet pipeline 12 can be enhanced, the probability of occurrence of safety accidents such as conduction and the like at the water outlet pipeline 12 is reduced, the personal safety of staff is ensured, and the influence of current and the like on the stable operation of equipment can be avoided.

In some embodiments, the bus ring 10 is substantially annular, and includes a first end and a second end opposite to each other, and a line connecting the first end and the second end passes through a center of the bus ring 10. The first end of the converging ring 10 is connected and communicated with the water inlet channel 11, and the second end of the converging ring 10 is connected and communicated with the water outlet channel 12, wherein cooling water enters the inner cavity of the converging ring 10 through the water inlet channel 11 and flows out through the water outlet channel 12 to cool the generator of the nuclear power station, such as a stator component for cooling the generator.

Preferably, the catchment ring 10 may be made of an insulating material. For example, the catchment ring 10 may be made of ultra-high molecular weight polyethylene, abbreviated as UHMWPE, which is also called high-strength high-modulus polyethylene, which is an unbranched linear polyethylene having a molecular weight of 150 ten thousand or more, and which has excellent mechanical properties, excellent impact resistance, excellent wear resistance, chemical resistance, and good optical resistance. Of course, the bus ring 10 may be made of other materials, which is not particularly limited herein.

Preferably, the water inlet pipe 11 may be made of an insulating material, for example, the water inlet pipe 11 may be made of ultra-high molecular weight polyethylene. Of course, the bus ring 10 may be made of other materials, which is not particularly limited herein.

Similarly, the water outlet pipe 12 may be made of an insulating material, for example, the water outlet pipe 11 may be made of ultra-high molecular weight polyethylene. Of course, the bus ring 10 may be made of other materials, which is not particularly limited herein.

Of course, the water collecting ring 10, the water inlet pipe 11 and the water outlet pipe 12 can be made of the same material. Preferably, the catchment ring 10, the water inlet pipe 11 and the water outlet pipe 12 are of an integral structure.

In some embodiments, the first flange 21 may be made of a metal material, such as stainless steel, and the first flange 21 may be welded and fixed on the water outlet pipe 12, the longitudinal section of the first flange 21 is generally T-shaped, the first flange 21 may include a first annular body and a first sleeve portion axially connected to the first annular body, the first annular body and the first sleeve portion are coaxially disposed, the first sleeve portion is disposed near one side of the bus ring 10, and preferably, an end of the first sleeve portion away from the first annular body may be welded and fixed with an outer surface of the bus ring 10.

The first flange 21 has a first through cavity, which axially penetrates through the first sleeve connection portion and the first annular body, and is sleeved on the periphery of the water outlet pipeline 12, and an inner wall surface of the first through cavity may be welded with an outer wall surface of the water outlet pipeline 12. The first annular body is provided with a plurality of first through holes, and the plurality of first through holes are arranged at intervals along the circumference of the axis of the first annular body. The first through hole may also be defined as a flange hole in some embodiments.

In some embodiments, a first groove a is provided on a surface of the first flange 21 abutting the insulator 23, and the first groove a communicates with the outer circumferential surface of the first flange 21 and the counterbore 233.

In some embodiments, the second flange 22 may be made of a metal material, such as stainless steel, and the second flange 22 may be disposed in mirror symmetry with the first flange 21.

The second flange 22 may be welded and fixed on the water outlet pipe 12, the longitudinal section of the second flange 21 is substantially T-shaped, the second flange 22 may include a second annular body and a second sleeve portion axially connected to the second annular body, the second annular body and the second sleeve portion are coaxially disposed, the second flange 22 has a second through cavity, the second through cavity axially penetrates through the second sleeve portion and the second annular body, the second through cavity is sleeved on the outer periphery of the water outlet pipe 12, and an inner wall surface of the second through cavity may be welded with an outer wall surface of the water outlet pipe 12. The second annular body is provided with a plurality of second through holes which are arranged at intervals along the circumference of the axle center of the second annular body, and the second through holes can be correspondingly arranged with the first through holes in the arrangement quantity and the arrangement positions. The second through hole may also be defined as a flange hole in some embodiments.

In some embodiments, a second groove B is provided on a face of the second flange 22 abutting the insulator 23, and the second groove B communicates with the outer peripheral face of the second flange 22 and the counterbore 233.

Referring to fig. 3 and 4, in some embodiments, the insulating member 23 is disposed between the first flange 21 and the second flange 22 and abuts against opposite sides of the first flange 21 and the second flange 22, respectively, so as to insulate the first flange 21 from the second flange 22.

The insulator 23 may be an annular block made of polytetrafluoroethylene material. The polytetrafluoroethylene material has good shock resistance, high temperature resistance, deformation resistance and insulating property, and is well suitable for the working environment of the generator with pressurized water and strong shock.

The insulating member 23 may have a circular ring structure, and has a third through-hole 231 penetrating through both axial sides thereof, and a plurality of third through-holes 232 spaced apart from each other on an outer circumference of the third through-hole 231, wherein the third through-hole 231 is adapted to be sleeved on an outer circumference of the water outlet pipe 12. Wherein, the side of the insulating member 23 facing the second flange 22 is provided with the counter bore 233, the counter bore 233 may be a circular hole, the counter bore 233 is communicated with the third through hole 232, the inner diameter of the counter bore 233 is larger than the inner diameter of the third through hole 232, the inner diameter of the insulating sleeve 31 is larger than the inner diameter of the third through hole 232 and smaller than the inner diameter of the counter bore 233, so that the bolt 41 is inserted into the third through hole 232, and the insulating sleeve 31 does not insert into the third through hole 232. The insulating part 23 is provided with the counter bore 233, so that a section of length is reserved on the axial length of the insulating part 23 for lengthening the insulating sleeve 31, the creepage distance is effectively increased, the insulating grade is effectively improved, and the anti-fouling performance is improved.

The insulating sleeve 31 is preferably generally circular hollow tubular and may have one end that is a second through bore (flange bore) through the second flange and extends into the counterbore 233. The insulating sleeve 31 may be made of a hard insulating material such as a phenolic plastic, a polyurethane plastic, an epoxy plastic, an unsaturated polyester plastic, a furan plastic, a silicone resin, an acryl resin, etc., and modified resins thereof. Of course, the insulating sleeve 31 may be made of other insulating materials, which is not particularly limited herein.

Referring to fig. 5 and 6, the insulating spacer 32 is generally in a ring shape, such as a circular ring shape, and the insulating spacer 32 may be made of a rigid insulating material such as a phenolic plastic, a polyurethane plastic, an epoxy plastic, an unsaturated polyester plastic, a furan plastic, a silicone resin, an acryl resin, or the like, and modified resins thereof. Of course, the insulating spacer 32 may be made of other insulating materials, which is not limited herein.

The insulating spacer 32 has a stepped wall 323 on a side facing the second flange 22, and one end of the insulating bush 31 abuts against the stepped wall 323. Specifically, the center of the insulating spacer 32 is provided with a first hole 321 and a second hole 322 that are connected in an axial direction, the inner diameter of the first hole 321 is smaller than the inner diameter of the second hole 322, so that the step wall 323 is formed on the axial wall surface at the connection position of the first hole 321 and the second hole 322, and the outer diameter of the insulating sleeve 31 is larger than the inner diameter of the first hole 321 and smaller than the inner diameter of the second hole 322, so that one end of the insulating sleeve 31 can be located in the second hole 322 without extending into or passing through the first hole 321.

Preferably, the difference between the distance between the bottom wall of the counterbore 233 and the stepped wall 323 and the length of the insulating sleeve 31 is greater than 0 and less than or equal to 0.3 mm, so that the insulating sleeve 31 has a certain axial movement space and is not damaged by being squeezed after the fastener 40 is installed.

In some embodiments, the bolts 41 and nuts 42 are used for the fastening connection between the first flange 21, the insulator 23 and the second flange 22.

The bolt 41 has a bolt head and a threaded portion coaxially disposed, the threaded portion is disposed through the insulating spacer 32, the insulating sleeve 31, the insulating member 23 and the second flange 22, and the bolt head is left on a side of the second flange 22 facing away from the first flange 21, and the insulating spacer 32 may be disposed between the bolt head and the second flange 22. Preferably, the bolt 41 is a high strength bolt, and the nut 42 is a high strength nut.

Preferably, the fastener 40 further includes a plurality of belleville washers 43, the belleville washers 43 disposed between the nut 42 and the first flange 21. It will be appreciated that the dished washer 43 may increase the preload of the fastener 40, as well as increase the reliability and stability of the overall device during operation.

Further, at least two dish-shaped washers 43 are provided between each nut 42 and the first flange 21, and the two dish-shaped washers 43 are spliced in opposite directions.

In some embodiments, the water collection device for a nuclear power plant generator further comprises at least two sealing gaskets 50, the at least two sealing gaskets 50 being respectively embedded on the faces of the first flange 21 opposite to the second flange 22; at least two sealing washers 50 each abut the insulator 23, and at least two sealing washers 50 each are located inside the counterbore 233.

Preferably, the sealing gasket 50 may be an annular structure, which may be a silicone gasket.

It will be appreciated that at least two sealing gaskets 50 may be used to strengthen the connection of the upper and lower axial sides of the insulator 23 to the first flange 21 and the second flange 22, increasing the overall sealing performance of the water ring 10.

It is to be understood that the above examples only represent preferred embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the utility model; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims (10)

1. A water catchment apparatus for a nuclear power plant generator, comprising:

the water collecting device comprises a water collecting ring (10), wherein one end of the water collecting ring (10) is connected with a water inlet pipeline (11), the other end of the water collecting ring (10) is connected with a water outlet pipeline (12), and the water inlet pipeline (11) and the water outlet pipeline (12) are communicated with an inner cavity of the water collecting ring (10);

the connecting assembly (20), the connecting assembly (20) comprises a first flange (21), a second flange (22) and an insulating piece (23), the first flange (21) is sleeved on one side, close to the water collecting ring (10), of the water outlet pipeline (12), the second flange (22) is sleeved on one side, far away from the water collecting ring (10), of the water outlet pipeline (12), and the insulating piece (23) is sleeved on the water outlet pipeline (12) and is abutted between the first flange (21) and the second flange (22); a plurality of counter bores (233) are formed on one side of the insulating piece (23) facing the second flange (22);

the insulation assembly (30), the insulation assembly (30) comprises an insulation sleeve (31) and an insulation cushion block (32), the insulation sleeve (31) penetrates through a flange hole of the second flange (22), and one end of the insulation sleeve (31) stretches into the counter bore (233); the other end of the insulating sleeve (31) is abutted against the insulating cushion block (32);

the fastener (40) comprises a plurality of bolts (41) and a plurality of nuts (42), wherein a plurality of bolts (41) sequentially penetrate through the insulating cushion block (32), the insulating sleeve (31), the insulating piece (23) and the first flange (21), and the nuts (42) are locked on the parts, protruding out of the first flange (21), of the bolts (41).

2. A water collection device for a generator of a nuclear power plant according to claim 1, characterized in that the insulation (23) is an annular block made of polytetrafluoroethylene material.

3. The water collection device for a nuclear power plant generator of claim 1, wherein the fastener (40) further comprises a plurality of dish washers (43), the dish washers (43) being disposed between the nut (42) and the first flange (21).

4. A water collection device for a generator of a nuclear power plant according to claim 3, characterized in that at least two dish-shaped gaskets (43) are provided between each nut (42) and the first flange (21), and in that the two dish-shaped gaskets (43) are spliced in opposite directions.

5. The water collecting device for a nuclear power plant generator according to claim 1, further comprising at least two sealing gaskets (50), at least two sealing gaskets (50) being respectively embedded on the faces of the first flange (21) opposite to the second flange (22);

at least two sealing washers (50) are abutted against the insulating member (23), and at least two sealing washers (50) are located inside the counter bore (233).

6. A water collecting device for a generator of a nuclear power plant according to claim 3, characterized in that the first flange (21) and the second flange (22) are stainless steel pieces, and the first flange (21) is welded and fixed with the water outlet pipe (12).

7. The water collecting device for a nuclear power plant generator according to any one of claims 1 to 6, characterized in that the side of the insulating spacer (32) facing the second flange (22) has a stepped wall, on which one end of the insulating sleeve (31) abuts.

8. The water collecting device for a nuclear power plant generator according to claim 7, wherein a difference between a distance between a bottom wall of the counterbore (233) and the step wall and a length of the insulating sleeve (31) is greater than 0 and equal to or less than 0.3 mm.

9. The water collecting device for a nuclear power plant generator according to any one of claims 1 to 6, wherein a first groove (a) is provided on a face of the first flange (21) abutting against the insulator (23), the first groove (a) communicating to an outer peripheral face of the first flange (21) and the counter bore (233).

10. The water collecting device for a nuclear power plant generator according to any one of claims 1 to 6, wherein a second groove (B) is provided on a face of the second flange (22) abutting against the insulator (23), the second groove (B) communicating to an outer peripheral face of the second flange (22) and the counter bore (233).