CN220887692U - Auxiliary anode assembly of water system for nuclear power plant - Google Patents

Abstract

The utility model discloses an auxiliary anode component of a water system for a nuclear power plant, which comprises an auxiliary anode, a main pipe seat, a sub pipe seat, a rotary gland and a sealing sleeve; the auxiliary anode comprises a junction box, an anode main body, a sheath and a connecting body; the anode main body is provided with a mounting section, the rotating gland is sleeved on the mounting section and is in threaded connection with the mounting section, and the sealing sleeve is sleeved on the mounting section; the connector is arranged on the mounting section; the sub-tube seat is detachably connected with the connector and the mother tube seat respectively, and when the rotary gland presses towards the sealing sleeve, the sealing sleeve deforms to seal the through cavity of the sub-tube seat. The sealing sleeve is adopted for compression sealing, so that the sealing performance can be improved, and the problem that the sleeve of the auxiliary anode is blocked with the tube seat in the related art can be avoided. In addition, when this nuclear power plant water system auxiliary anode subassembly need dismantle, can dismantle whole sub-tube seat and auxiliary anode with sub-tube seat from the main tube seat, avoid auxiliary anode to be unable to dismantle the change because the card is dead.

Description

Auxiliary anode assembly of water system for nuclear power plant

Technical Field

The utility model relates to the technical field of nuclear power, in particular to an auxiliary anode component of a water system for a nuclear power plant.

Background

Cathodic protection is a common method for preventing and slowing down corrosion of protected objects, and is widely applied to production and life. Also in nuclear power plants, cathodic protection plays a very important role in some seawater systems with severe environmental conditions. Wherein impressed current cathodic protection is used in the main pipeline of the water system for the safety factory.

The impressed current cathodic protection generally consists of an auxiliary anode, a reference electrode and a direct current power supply. Currently in a nuclear power plant, as shown in fig. 1, an auxiliary anode 200 is mounted on a tube holder 100 welded to a main pipe, and the tube holder 100 and the auxiliary anode 200 are connected (typically, welded) by means of a flange 300. In the main pipeline of the water system for the safety factory, one auxiliary anode 200 is arranged at intervals, and the number of the auxiliary anodes 200 on the whole pipeline is large. These auxiliary anodes 200 provide good protection for the pipe at ordinary times, but with the increase of the service time, the reliability of the anode blocks of part of the auxiliary anodes 200 is reduced, and phenomena such as water leakage, damage and the like can occur, and the auxiliary anodes 200 are replaced at this time. Because of long-time service, the sleeve 400 of the auxiliary anode 200 and the corrosion product accumulated in the gap between the sleeve 400 and the tube seat 100 firmly clamp the sleeve 400 on the tube seat 100, and a large amount of sealant is used in the installation process, if the auxiliary anode 200 and the sleeve 400 thereof are pulled out in a hard pulling mode, the time and the labor are wasted, the risk of fracture exists, and the safe and stable operation of the system is influenced.

Disclosure of utility model

The utility model aims to solve the technical problem of providing an auxiliary anode component of a water system for a nuclear power plant.

The technical scheme adopted for solving the technical problems is as follows: an auxiliary anode component of a water system for a nuclear power plant is constructed, and the auxiliary anode component comprises an auxiliary anode, a main pipe seat, a sub pipe seat, a rotary gland and a sealing sleeve;

The auxiliary anode comprises a junction box, an anode main body, a sheath and a connecting body, wherein the junction box is connected with one end of the anode main body, the sheath is fixedly sleeved on one section of the anode main body, and the sheath and the junction box are arranged at intervals; the anode main body is positioned on a section from the sheath to the junction box to form a mounting section, an external thread is arranged on the mounting section, the rotary gland is sleeved on the mounting section, the wall surface of the inner cavity of the rotary gland is provided with an internal thread matched with the external thread, and the sealing sleeve is sleeved on the mounting section and positioned between the sheath and the rotary gland; the connector is arranged on the mounting section;

The main pipe seat is used for being installed on a pipeline, the sub pipe seats are detachably connected with the connecting body and the main pipe seat respectively, and when the rotary gland faces to the sealing sleeve for pressing, the sealing sleeve deforms to seal a through cavity of the sub pipe seat.

In some embodiments, the rotary gland has first and second axially connected covers having an outer diameter that matches the inner diameter of the through cavity of the sub-tube holder.

In some embodiments, the periphery of the first cover body is further provided with a plurality of anti-skid grooves.

In some embodiments, the number of connectors is at least two, each connector comprises a first connector, a second connector and a third connector, a first end of the first connector is connected with the mounting section, a second end of the first connector is connected with a first end of the second connector, a second end of the second connector is connected with a second end of the third connector, and the rotary gland is located between the first connector and the sealing sleeve;

the third connecting part is detachably connected with the sub-tube seat.

In some embodiments, the second connecting portion is provided with a plurality of through holes for a fastener to pass through to press against the rotary gland.

In some embodiments, the number of the connectors is three, and the three connectors are uniformly distributed at intervals along the axis of the anode main body.

In some embodiments, the third connection portion is threadably connected to the sub-tube holder.

In some embodiments, the sub-tube holder is threadably coupled to the parent tube holder.

In some embodiments, the sealing sleeve is a cylindrical corrugated structure.

In some embodiments, the sealing sleeve is made of a rubber material.

The implementation of the utility model has the following beneficial effects: the auxiliary anode component of the water system for the nuclear power plant is compressed and sealed by the sealing sleeve, so that the sealing performance can be improved, and the problem that the sleeve of the auxiliary anode is blocked with the tube seat in the related art can be avoided. In addition, when this nuclear power plant water system auxiliary anode subassembly need dismantle, can dismantle whole sub-tube seat and auxiliary anode with sub-tube seat from the main tube seat, avoid auxiliary anode to be unable to dismantle the change because the card is dead.

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 view of an auxiliary anode installation in the related art;

FIG. 2 is a schematic illustration of the structure of a nuclear power plant water system auxiliary anode assembly (uncompressed seal cartridge) in accordance with some embodiments of the present utility model;

FIG. 3 is a schematic illustration of the structure of a nuclear power plant water system auxiliary anode assembly (compression seal cartridge) in accordance with some embodiments of the present utility model;

FIG. 4 is a schematic illustration of the structure of a nuclear power plant water system auxiliary anode assembly (with the parent and child headers omitted) in some embodiments of the utility model;

FIG. 5 is a schematic view of the structure of an auxiliary anode in some embodiments of the utility model;

FIG. 6 is a schematic illustration of the structure of a rotary gland in some embodiments of the utility model;

Figure 7 is a cross-sectional view of a sealing boot in some embodiments of the utility model.

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.

Referring to fig. 1 to 7, the present utility model shows an auxiliary anode assembly for a water system for a nuclear power plant, which includes an auxiliary anode 10, a main pipe seat 20, a sub pipe seat 30, a rotary gland 40, and a sealing sleeve 50.

The auxiliary anode 10 comprises a junction box 11, an anode main body 12, a sheath 13 and a connecting body 14, wherein the junction box 11 is connected with one end of the anode main body 12, the sheath 13 is fixedly sleeved on one section of the anode main body 12, and the sheath 13 and the junction box 11 are arranged at intervals; the anode main body 12 is positioned on a section from the sheath 13 to the junction box 11 to form a mounting section 121, an external thread is arranged on the mounting section 121, the rotary gland 40 is sleeved on the mounting section 121, the wall surface of the inner cavity of the rotary gland 40 is provided with an internal thread matched with the external thread, and the sealing sleeve 50 is sleeved on the mounting section 121 and positioned between the sheath 13 and the rotary gland 40; the connector 14 is provided on the mounting section 121.

The auxiliary anode component of the water system for the nuclear power plant is compressed and sealed by the sealing sleeve 50, so that the sealing performance can be improved, and the problem of jamming between the sleeve of the auxiliary anode and the tube seat in the related art can be avoided. In addition, when the auxiliary anode component of the water system for the nuclear power plant needs to be disassembled, the whole sub-tube base 30 and the auxiliary anode 10 can be disassembled from the main tube base 20, so that the situation that the auxiliary anode 10 cannot be disassembled and replaced due to clamping is avoided.

Referring specifically to fig. 2 and 3, the female pipe holder 20 is configured to be mounted on a pipe, the sub-pipe holder 30 is detachably connected to the connector 14 and the female pipe holder 20, and when the rotary gland 40 presses against the sealing sleeve 50, the sealing sleeve 50 deforms to seal the through cavity of the sub-pipe holder 30.

Referring to fig. 4 and 5, in some embodiments, the anode body 12 is generally cylindrical, may be made of titanium material, and may be provided with a precious metal oxide (MMO) coating on its surface. The sheath 13 is generally tubular and is fixed to a section of the anode body 12, and the outer diameter of the sheath 13 is larger than the diameter of the anode body 12, so as to form a limiting surface at one axial end of the sheath 13 for abutting against one axial end of the sealing sleeve 50. The sheath 13 may be made of an insulating material.

In some embodiments, the number of the connectors 14 is at least two, each connector 14 has a zigzag structure, each connector 14 may include a first connecting portion 141, a second connecting portion 142 and a third connecting portion 143, a first end of the first connecting portion 141 is connected to the mounting section 121, a second end of the first connecting portion 141 is connected to a first end of the second connecting portion 142, a second end of the second connecting portion 142 is connected to a second end of the third connecting portion 143, and the rotary gland 40 is located between the first connecting portion 141 and the sealing sleeve 50.

The third connection portion 143 is detachably connected to the sub-tube holder 30, and preferably, the third connection portion 143 is screw-connected to the sub-tube holder 30, and as shown in fig. 2, the third connection portion 143 is fixed to the sub-tube holder 30 by using a bolt 60.

In some embodiments, the second connecting portion 142 has a plurality of through holes 1421 for the fasteners to pass therethrough to abut against the rotary gland 40. The fastener may be a bolt or a bolt. The number of the through holes 1421 may be one or more, and when the number of the through holes 1421 is plural, the plurality of through holes 1421 are disposed at intervals along the length direction of the second connection portion 142, and may be matched with a fastener to fix the rotary gland 40 at multiple angles.

In some embodiments, the number of connectors 14 is three, and three connectors 14 are spaced along the axis of the anode body 12, and the space between two adjacent connectors 14 facilitates the rotational operation of the rotary gland 40.

Referring to fig. 2, 3, 4 and 6, in some embodiments, the rotary gland 40 has a first cover 41 and a second cover 42 axially connected, the first cover 41 and the second cover 42 are both substantially cylindrical, the outer diameter of the first cover 41 is larger than the outer diameter of the second cover 42, the outer diameter of the second cover 42 is matched with the inner diameter of the through cavity of the sub-tube seat 30, for example, the outer diameter of the second cover 42 is equal to the inner diameter of the through cavity of the sub-tube seat 30, when the rotary gland 40 rotates downward to compress the sealing sleeve 50, the second cover 42 can enter the through cavity of the sub-tube seat 30, and sealing performance can be further improved.

In some embodiments, the outer periphery of the first cover 41 is further provided with a plurality of anti-slip grooves 411, or may be provided with a plurality of concave-convex structures or grains to improve friction force, the first cover 41 is further provided with a through groove 412 penetrating through the peripheral wall thereof radially, and the through groove 412 is used for inserting an operating member such as a screwdriver to assist in rotating the rotary gland 40. Or the through slot 412 may be inserted through a rigid rod-like article to rotate or secure the rotary gland 40. Alternatively, the aforementioned fasteners may pass through the through holes 1421 and through slots 412 to limit the rotation of the gland 40. Of course, the through groove 412 may be a non-through groove structure.

In some embodiments, the outer surface of the second cover 42 is a smooth surface with a low roughness to avoid friction with the inner wall of the cavity of the sub-tube holder 30.

Preferably, the inner cavity of the first cover 41 is provided with an internal thread, while the inner cavity of the second cover 42 is not provided with an internal thread. Or the inner cavities of the first cover 41 and the second cover 42 are respectively provided with internal threads.

In some embodiments, the inner surface of the cavity of the sub-tube holder 30 is smooth and flat and has the same diameter as the outer diameter of the sealing sleeve 50 in the uncompressed condition.

In some embodiments, the sub-mount 30 is threadably coupled to the parent mount 20. The main tube seat 20 and the sub tube seat 30 may have flange structures, the inner diameter of the through cavity of the main tube seat 20 is larger than the inner diameter of the through cavity of the sub tube seat 30, preferably, the inner diameter of the through cavity of the main tube seat 20 may be twice or three times the inner diameter of the through cavity of the sub tube seat 30, and the inner diameter of the through cavity of the main tube seat 20 is also larger than the outer diameter (or diameter) of the anode main body 12 or the sheath 13, thereby avoiding the occurrence of jamming between the anode main body 12 or the sheath 13 and the main tube seat 20.

Referring to fig. 7, the sealing sleeve 50 has a cylindrical corrugated structure, which is compressed to be close to each other, and the overall outer diameter is increased and the inner diameter is decreased. The sealing sleeve 50 is made of rubber material. The seal cartridge 50 is constructed like an expansion joint, a telescopic joint.

The auxiliary anode assembly of the water system for the nuclear power plant is applied as follows, referring to fig. 2 and 3, when the auxiliary anode 10 works normally, the connecting body 14 is fixedly connected with the sub-tube seat 30, the sub-tube seat 30 is fixedly connected with the main tube seat 20, the rotary gland 40 is unscrewed to compress the sealing sleeve 50, the axial distance of the sealing sleeve 50 is shortened after being compressed, and the sealing sleeve radially expands, so that the through cavity on the sub-tube seat 30 is firmly sealed. When the tightening is completed, fasteners, such as stop screws, are screwed into the through holes 1421 against the rotary gland 40 to prevent loosening during long-term operation. If the auxiliary anode 10 is required to be disassembled, the sub-tube holder 30 and the main tube holder 20 can be disassembled, and then the sub-tube holder 30 and the auxiliary anode 10 are taken out entirely.

The auxiliary anode component of the water system for the nuclear power plant has the following beneficial effects: 1. in contrast to conventional flange face seals, which have only one layer of seal, the gland 50 of the present utility model is compressed to form a multi-seal. Meanwhile, compared with the traditional sealing mode, the sealing is carried out from the outer side, and the sealing sleeve 50 of the utility model is equivalent to the sealing started from the inner side of a pipeline, so that a better sealing effect can be achieved. Under the condition of good sealing effect, the use of sealant can be omitted, the installation procedure is simplified, the cost of consumable products is saved, and the auxiliary anode 10 can be installed and taken out more easily.

2. The auxiliary anode (such as reference numeral 200 of fig. 1) used in the current safety factory water system has a gap of about 1mm between the sleeve (such as reference numeral 400 of fig. 1) and the tube seat (such as reference numeral 100 of fig. 1), and is easy to accumulate dirt and corrosion products, so that the sleeve (such as reference numeral 400 of fig. 1) is blocked and jammed when being taken out. The utility model fills the gap between the two by directly utilizing the sealing structure (sealing sleeve 50) from the structural design, thereby fundamentally solving the problems of corrosion products and dirt accumulation in the gap, and avoiding the situation of jamming and jamming.

3. The original auxiliary anode tube seat is directly welded on a main pipeline of the water system for the safety factory, and once the tube seat is rusted, screwed and the like, the operations such as fire cutting, welding and the like are required to be carried out on site, so that the time of a working window is greatly prolonged, and the usability of the water system for the safety factory is affected. The utility model adopts the design of the primary and secondary tube seats, and solves the pain point. When any unexpected extreme condition occurs on the sub-tube holder 30, the sub-tube holder can be directly removed from the position of the main tube holder 20 and replaced integrally. The maintenance time is saved, and the unit operation is more reliable.

The auxiliary anode component of the water system for the nuclear power plant can be applied to a safe water system for the power plant, and particularly, the position of the auxiliary anode is increased by new technology improvement. Through the multi-aspect optimization design, the replacement and maintenance of the auxiliary anode at the later stage become simple and efficient. The time required for replacing the auxiliary anode is greatly shortened, the replacement and maintenance cost is reduced, the risk that the anode breaks into foreign matters is reduced, the usability and the reliability of a water system of a safety factory are ensured, and the productivity of a unit is improved.

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. An auxiliary anode assembly of a water system for a nuclear power plant is characterized by comprising an auxiliary anode (10), a main pipe seat (20), a sub pipe seat (30), a rotary gland (40) and a sealing sleeve (50);

the auxiliary anode (10) comprises a junction box (11), an anode main body (12), a sheath (13) and a connecting body (14), wherein the junction box (11) is connected with one end of the anode main body (12), the sheath (13) is fixedly sleeved on one section of the anode main body (12), and the sheath (13) and the junction box (11) are arranged at intervals; the anode main body (12) is positioned on a section from the sheath (13) to the junction box (11) to form a mounting section (121), an external thread is arranged on the mounting section (121), the rotating gland (40) is sleeved on the mounting section (121), the wall surface of the inner cavity of the rotating gland (40) is provided with an internal thread matched with the external thread, and the sealing sleeve (50) is sleeved on the mounting section (121) and positioned between the sheath (13) and the rotating gland (40); the connecting body (14) is arranged on the mounting section (121);

The main pipe seat (20) is used for being installed on a pipeline, the sub pipe seat (30) is detachably connected with the connecting body (14) and the main pipe seat (20) respectively, and when the rotary gland (40) faces to the sealing sleeve (50) for pressing, the sealing sleeve (50) deforms to seal a through cavity of the sub pipe seat (30).

2. The auxiliary anode assembly for a water system for a nuclear power plant according to claim 1, wherein the rotary gland (40) has a first cover body (41) and a second cover body (42) which are axially connected, and an outer diameter of the second cover body (42) is matched with an inner diameter of a through cavity of the sub-tube seat (30).

3. The auxiliary anode assembly for a water system for a nuclear power plant according to claim 2, wherein the outer circumference of the first cover body (41) is further provided with a plurality of anti-slip grooves (411).

4. The auxiliary anode assembly for a water system for a nuclear power plant according to claim 2, wherein the number of the connection bodies (14) is at least two, each connection body (14) comprises a first connection portion (141), a second connection portion (142) and a third connection portion (143), a first end of the first connection portion (141) is connected with the mounting section (121), a second end of the first connection portion (141) is connected with a first end of the second connection portion (142), a second end of the second connection portion (142) is connected with a second end of the third connection portion (143), and the rotary gland (40) is located between the first connection portion (141) and the sealing sleeve (50);

the third connecting portion (143) is detachably connected to the sub-tube holder (30).

5. The auxiliary anode assembly for a water system for a nuclear power plant according to claim 4, wherein the second connecting portion (142) is provided with a plurality of through holes (1421) for fasteners to pass therethrough to abut against the rotary gland (40).

6. The auxiliary anode assembly for a water system for a nuclear power plant according to claim 5, wherein the number of the connectors (14) is three, and the three connectors (14) are uniformly distributed at intervals along the axis of the anode main body (12).

7. The auxiliary anode assembly for a water system for a nuclear power plant according to claim 6, wherein the third connection portion (143) is screw-coupled with the sub-tube holder (30).

8. The auxiliary anode assembly for a water system for a nuclear power plant according to any one of claims 1 to 7, wherein the sub-pipe holder (30) is screw-coupled with the main pipe holder (20).

9. The auxiliary anode assembly for a water system for a nuclear power plant according to any one of claims 1 to 7, wherein the sealing sleeve (50) is a cylindrical corrugated structure.

10. The auxiliary anode assembly for a water system for a nuclear power plant according to claim 9, wherein the sealing sleeve (50) is made of a rubber material.