Sacrificial anode assembly for nuclear power plant condenser

Abstract

The utility model discloses a sacrificial anode assembly for a nuclear power plant condenser. The sacrificial anode assembly comprises a fastening bolt, a sacrificial anode, a fastening nut and a protective cover, the protective cover comprises a cover body and a cover body, the cover body is cylindrical, a plurality of first through holes are formed in the cover body, and a plurality of second through holes are formed in the cover body; the first end of the fastening bolt is arranged on the inner wall of the water chamber of the nuclear power plant condenser, the cover body sleeves the fastening bolt, the sacrificial anode sleeves the fastening bolt and is located in the cover body, the fastening nut is installed on the part, protruding out of the second end of the sacrificial anode, of the fastening bolt, and the cover body is detachably installed on the opening side of the cover body. The protective cover can protect the sacrificial anode, prevents the sacrificial anode from crushing parts in the condenser after the sacrificial anode is broken and falls off in the operation process, and ensures safe and stable operation of the condenser.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power, in particular to a sacrificial anode component for a condenser in a nuclear power plant. Background Art

[0002] like Figure 1 As shown, the condenser is one of the important equipment inside the nuclear power plant. Its main function is to cool the spent steam of the turbine and provide a suitable back pressure for the turbine. The amount of seawater required by the nuclear power plant is large, and the refueling cycle of the nuclear power plant is long. During daily operation, there is no window to inspect and repair the part of the condenser that contacts the seawater. Therefore, high requirements are placed on the corrosion protection of the parts of the nuclear power plant condenser that contact the seawater. At present, the main method for corrosion protection of the condenser water chamber of the nuclear power plant is the rubber lining 200 on the wall of the condenser water chamber 100, and the installation of the sacrificial anode 400 by the bolts 300 welded on the inner wall of the condenser water chamber 100, and the locking by the nut 500.

[0003] During the operation of the condenser, it was found that the sacrificial anode 400 was broken and fell off, posing a risk of damaging parts inside the condenser and affecting the safe and stable operation of the condenser. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a sacrificial anode component for a condenser of a nuclear power plant.

[0005] The utility model solves the technical problem by adopting the following technical solution: constructing a sacrificial anode assembly for a condenser of a nuclear power plant, comprising a fastening bolt, a sacrificial anode, a fastening nut and a protective cover; the protective cover comprises a cover body and a cover body, the cover body is cylindrical, and a plurality of first through holes are arranged on the cover body, and a plurality of second through holes are arranged on the cover body;

[0006] The first end of the fastening bolt is arranged on the inner wall of the condenser water chamber of the nuclear power plant, the cover body is sleeved on the fastening bolt, the sacrificial anode is sleeved on the fastening bolt, and the sacrificial anode is located in the cover body, the fastening nut is installed on the part of the fastening bolt protruding from the second end of the sacrificial anode, and the cover body is detachably installed on the opening side of the cover body.

[0007] In some embodiments, the cover body includes a bottom wall and a surrounding wall extending from the periphery of the bottom wall; and a plurality of the first through holes are provided on the bottom wall and / or the surrounding wall.

[0008] In some embodiments, the fastening bolt is provided with a step portion;

[0009] The bottom wall is provided with a first through cavity, the first through cavity is sleeved on the fastening bolt, and the bottom of the first through cavity abuts against the step portion.

[0010] In some embodiments, the cover body is in a plate shape, and a second through cavity is provided on the cover body, and the second through cavity is sleeved on the fastening bolt.

[0011] In some embodiments, the surrounding wall is provided with fastening holes penetrating through the inner and outer side walls thereof, and the circumferential side wall of the cover body is provided with a connecting groove;

[0012] The protective cover also includes a fastener, which passes through the fastening hole and is screwed into the connecting groove to connect and fix the cover body and the cover body.

[0013] In some embodiments, the sacrificial anode assembly for a condenser in a nuclear power plant further comprises a sleeve; the sleeve is sleeved on the fastening bolt and located at the inner periphery of the cover; the sacrificial anode is sleeved on the outer periphery of the sleeve.

[0014] In some embodiments, the sacrificial anode assembly for a condenser of a nuclear power plant further includes a first gasket and a second gasket; the first gasket is sleeved on the fastening bolt and is located between the sacrificial anode and the inner side of the bottom wall of the cover;

[0015] The second washer is sleeved on the fastening bolt and is located between the sacrificial anode and the fastening nut.

[0016] In some embodiments, the number of the fastening nuts is at least two.

[0017] In some embodiments, the sacrificial anode is a zinc-aluminum alloy.

[0018] In some embodiments, the cover body and the lid body are both insulating members.

[0019] The implementation of the utility model has the following beneficial effects: the sacrificial anode assembly for the condenser of a nuclear power plant includes a fastening bolt, a sacrificial anode, a fastening nut and a protective cover; the protective cover includes a cover body and a cover body, the cover body is cylindrical, and a plurality of first through holes are provided on the cover body, and a plurality of second through holes are provided on the cover body; the first end of the fastening bolt is arranged on the inner wall of the water chamber of the condenser of the nuclear power plant, the cover body is sleeved on the fastening bolt, the sacrificial anode is sleeved on the fastening bolt, and the sacrificial anode is located in the cover body, the fastening nut is installed on the part of the fastening bolt protruding from the second end of the sacrificial anode, and the cover body is detachably installed on the opening side of the cover body. The protective cover can protect the sacrificial anode, prevent the sacrificial anode from breaking and falling off during operation and damaging the parts in the condenser, and ensure the safe and stable operation of the condenser. 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 schematic diagram of sacrificial anode installation in the related art;

[0022] Figure 2 It is a schematic diagram of the structure of a sacrificial anode assembly for a condenser in a nuclear power plant in some embodiments of the utility model;

[0023] Figure 3 yes Figure 2 An exploded view of a sacrificial anode assembly for a nuclear power plant condenser;

[0024] Figure 4 is a cross-sectional view of a sacrificial anode assembly for a condenser in a nuclear power plant in some embodiments of the utility model;

[0025] Figure 5 It is a sectional exploded view of a sacrificial anode assembly for a condenser in a nuclear power plant in some embodiments of the utility model. DETAILED DESCRIPTION

[0026] 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.

[0027] 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.

[0028] 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.

[0029] See also Figures 2 to 5 The utility model shows a sacrificial anode assembly for a condenser in a nuclear power plant, comprising a fastening bolt 1, a sacrificial anode 2, a fastening nut 3 and a protective cover 4; the protective cover 4 comprises a cover body 41 and a cover body 42, the cover body 41 is cylindrical, and a plurality of first through holes 41a are provided on the cover body 41, and a plurality of second through holes 42a are provided on the cover body 42.

[0030] The first end of the fastening bolt 1 is arranged on the inner wall 10 of the condenser water chamber of the nuclear power plant, the cover body 41 is sleeved on the fastening bolt 1, the sacrificial anode 2 is sleeved on the fastening bolt 1, and the sacrificial anode 2 is located in the cover body 41, the fastening nut 3 is installed on the part of the fastening bolt 1 protruding from the second end of the sacrificial anode 2, and the cover body 42 is detachably installed on the opening side of the cover body 41.

[0031] In this embodiment, a protective cover 4 is mounted on the outer periphery of the sacrificial anode 2 to protect the sacrificial anode 2, thereby preventing the sacrificial anode 2 from breaking and falling off during operation and damaging the components in the condenser, thereby ensuring the safe and stable operation of the condenser.

[0032] In some embodiments, the cover body 41 is generally cylindrical in structure and has an opening. Further, the cover body 41 may include a bottom wall 411 and a surrounding wall 412 extending from the periphery of the bottom wall 411; a plurality of first through holes 41a are provided on the bottom wall 411 and / or the surrounding wall 412. Preferably, a plurality of first through holes 41a may be provided on the bottom wall 411, and the plurality of first through holes 41a are arranged at intervals. In addition, a plurality of first through holes 41a are also provided on the surrounding wall 412, and the plurality of first through holes 41a are arranged at intervals along the circumferential direction of the surrounding wall 412. The first through holes 41a may be circular holes.

[0033] In some embodiments, a step portion 13 is provided on the fastening bolt 1; for example, the fastening bolt 1 may include a head 11 and a threaded portion 12 connected to the head 11, the head 11 may be coaxially arranged with the threaded portion 12, and the cross-sectional dimension of the head 11 is larger than the cross-sectional dimension of the threaded portion 12, so as to form a step portion 13 at the connection between the head 11 and the threaded portion 12.

[0034] Furthermore, a first through cavity 4111 is formed on the bottom wall 411 . The first through cavity 4111 is sleeved on the fastening bolt 1 , and the bottom of the first through cavity 4111 abuts against the step portion 13 .

[0035] Furthermore, the cover 42 is plate-shaped, and a second through cavity 421 is provided on the cover 42 , and the second through cavity 421 is sleeved on the fastening bolt 1 . That is, the threaded portion 12 of the fastening bolt 1 can be inserted into the first through cavity 4111 and the second through cavity 421 .

[0036] Preferably, the diameter of the cover body 42 may be smaller than or equal to the inner diameter of the cover body 41 .

[0037] Furthermore, the surrounding wall 412 is provided with a fastening hole 4121 passing through its inner and outer side walls, and the circumferential side wall of the cover body 42 is provided with a connecting groove 422; the protective cover 4 also includes a fastener 43, which passes through the fastening hole 4121 and is screwed into the connecting groove 422 to connect and fix the cover body 42 and the cover body 41.

[0038] The fastening hole 4121 and the connecting groove 422 may be arranged in a plurality corresponding to each other, and the fastener 43 may include a bolt, a screw or a pin.

[0039] In some embodiments, the sacrificial anode assembly for a condenser in a nuclear power plant further comprises a sleeve 5; the sleeve 5 may be a substantially tubular structure, and the sleeve 5 may be sleeved on the fastening bolt 1 and located on the inner periphery of the cover 41; the sacrificial anode 2 is sleeved on the outer periphery of the sleeve 5. The sleeve 5 may be made of stainless steel 316L.

[0040] In some embodiments, the sacrificial anode assembly for a condenser in a nuclear power plant further includes a first gasket 6 and a second gasket 7 ; the first gasket 6 is sleeved on the fastening bolt 1 and is located between the sacrificial anode 2 and the inner side of the bottom wall 411 of the cover body 41 .

[0041] The second washer 7 is sleeved on the fastening bolt 1 and is located between the sacrificial anode 2 and the fastening nut 3. Preferably, the first washer 6 and the second washer 7 can be made of stainless steel 316L.

[0042] In some embodiments, the upper portion of the sacrificial anode 2 may be provided with a groove, and the fastening nut 3 may be arranged in the portion in the groove. The number of the fastening nuts 3 is at least two, and if the fastening nuts 3 can be arranged in two, the locking ability of the two fastening nuts 3 is better, and a fastening nut 3 can be prevented from coming out of the fastening bolt 1. Preferably, the fastening bolt 1 and the fastening nut 3 can be made of stainless steel 316L.

[0043] In some embodiments, the sacrificial anode 2 is a substantially cylindrical structure, which may be a zinc-aluminum alloy.

[0044] In some embodiments, the cover 41 and the cover 42 are both insulating members. For example, the cover 41 and the cover 42 are both made of polyamide material, and the aforementioned fastener 43 can also be made of polyamide material. Polyamide material has the effect of resisting seawater corrosion. Of course, the protective cover 4 can also be made of other insulating materials, which is not specifically limited here.

[0045] In some embodiments, the surface of the inner wall 10 of the condenser water chamber of the nuclear power plant may also be provided with a rubber lining 20, and the rubber lining 20 may be rubber.

[0046] 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 sacrificial anode assembly for a condenser in a nuclear power plant, characterized in that: The invention comprises a fastening bolt (1), a sacrificial anode (2), a fastening nut (3) and a protective cover (4); the protective cover (4) comprises a cover body (41) and a cover body (42); the cover body (41) is cylindrical, and the cover body (41) is provided with a plurality of first through holes (41a); and the cover body (42) is provided with a plurality of second through holes (42a); The first end of the fastening bolt (1) is arranged on the inner wall (10) of the condenser water chamber of the nuclear power plant, the cover body (41) is sleeved on the fastening bolt (1), the sacrificial anode (2) is sleeved on the fastening bolt (1), and the sacrificial anode (2) is located in the cover body (41), the fastening nut (3) is installed on the part of the fastening bolt (1) protruding from the second end of the sacrificial anode (2), and the cover body (42) is detachably installed on the opening side of the cover body (41).

2. The sacrificial anode assembly for a condenser in a nuclear power plant according to claim 1, characterized in that: The cover body (41) comprises a bottom wall (411) and a surrounding wall (412) extending from the periphery of the bottom wall (411); a plurality of the first through holes (41a) are provided on the bottom wall (411) and / or the surrounding wall (412).

3. The sacrificial anode assembly for a condenser in a nuclear power plant according to claim 2, characterized in that: The fastening bolt (1) is provided with a step portion; A first through cavity (4111) is provided on the bottom wall (411), the first through cavity (4111) is sleeved on the fastening bolt (1), and the bottom of the first through cavity (4111) abuts against the step portion.

4. The sacrificial anode assembly for a condenser in a nuclear power plant according to claim 3, characterized in that: The cover body (42) is plate-shaped, and a second through cavity (421) is provided on the cover body (42), and the second through cavity (421) is sleeved on the fastening bolt (1).

5. The sacrificial anode assembly for a condenser in a nuclear power plant according to claim 4, characterized in that: The surrounding wall (412) is provided with a fastening hole (4121) penetrating through the inner and outer side walls thereof, and the circumferential side wall of the cover body (42) is provided with a connecting groove (422); The protective cover (4) further comprises a fastener (43), wherein the fastener (43) passes through the fastening hole (4121) and is screwed into the connecting groove (422) to connect and fix the cover body (42) and the cover body (41).

6. The sacrificial anode assembly for a condenser in a nuclear power plant according to any one of claims 1 to 5, characterized in that: The sacrificial anode assembly for a condenser of a nuclear power plant further comprises a sleeve (5); the sleeve (5) is sleeved on the fastening bolt (1) and is located on the inner periphery of the cover body (41); and the sacrificial anode (2) is sleeved on the outer periphery of the sleeve (5).

7. The sacrificial anode assembly for a condenser in a nuclear power plant according to any one of claims 1 to 5, characterized in that: The sacrificial anode assembly for a condenser in a nuclear power plant further comprises a first gasket (6) and a second gasket (7); the first gasket (6) is sleeved on the fastening bolt (1) and is located between the sacrificial anode (2) and the inner side of the bottom wall (411) of the cover body (41); The second washer (7) is sleeved on the fastening bolt (1) and is located between the sacrificial anode (2) and the fastening nut (3).

8. The sacrificial anode assembly for a condenser in a nuclear power plant according to any one of claims 1 to 5, characterized in that: The number of the fastening nuts (3) is at least two.

9. The sacrificial anode assembly for a condenser in a nuclear power plant according to any one of claims 1 to 5, characterized in that: The sacrificial anode (2) is a zinc-aluminum alloy.

10. The sacrificial anode assembly for a condenser in a nuclear power plant according to any one of claims 1 to 5, characterized in that: The cover body (41) and the lid body (42) are both insulating parts.

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