CN120280191A - Main water supply pipeline system of compartment of steam generator of nuclear power station and arrangement method of main water supply pipeline system - Google Patents
Main water supply pipeline system of compartment of steam generator of nuclear power station and arrangement method of main water supply pipeline system Download PDFInfo
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Abstract
本发明公开一种核电站蒸汽发生器隔间主给水管道系统及其布置方法，该方法包括：在主给水管道的出水端连接连续弯管，再通过连续弯管与蒸汽发生器的给水接口连接，使主给水管道与蒸汽发生器之间以连续弯管的形式形成补偿单元，以补偿管道热位移和蒸汽发生器的位移。本发明可大幅减少焊缝数量，降低焊接量和工程量，缩短安装周期。
The present invention discloses a main water supply pipe system for a steam generator compartment of a nuclear power plant and a layout method thereof, the method comprising: connecting a continuous elbow pipe at the water outlet end of the main water supply pipe, and then connecting the continuous elbow pipe to the water supply interface of the steam generator, so that a compensation unit is formed between the main water supply pipe and the steam generator in the form of a continuous elbow pipe to compensate for the thermal displacement of the pipe and the displacement of the steam generator. The present invention can greatly reduce the number of welds, reduce the welding amount and engineering amount, and shorten the installation period.
Description
Technical Field
The invention belongs to the technical field of nuclear engineering, and particularly relates to a compartment main water supply pipeline system of a steam generator of a nuclear power station and an arrangement method thereof.
Background
The main feed water pipe of the nuclear power plant is mainly used for providing feed water to the steam generator. At present, a typical nuclear power station main water supply pipeline is arranged in a mode that after entering a nuclear island, the main water supply pipeline is arranged along an annular space, finally enters a steam generator compartment and is welded with a water supply interface of the steam generator. The main water supply pipeline belongs to a high-energy pipeline and is directly connected with the steam generator, so that the heat displacement of the pipeline and the equipment displacement of the steam generator are required to be absorbed. The traditional main water supply pipeline is provided with a compensation bend through an elbow, a large number of welding seams exist, and a large number of supports are required to be arranged, so that the arrangement design of the main water supply pipeline in the evaporator compartment becomes complex, the installation quantity of the main water supply pipeline in the engineering site is large, the installation difficulty is high, and the installation period is long.
Disclosure of Invention
The invention aims to solve the technical problems of the prior art and provides a main water supply pipeline system of a compartment of a steam generator of a nuclear power station and an arrangement method thereof, which can greatly reduce the number of welding seams, reduce the welding quantity and the engineering quantity and shorten the installation period.
The technical scheme for solving the technical problems is as follows:
According to one aspect of the present invention there is provided a method of arranging a nuclear power plant steam generator compartment main feedwater piping system, comprising:
The water outlet end of the main water supply pipeline is connected with a continuous elbow, and then is connected with a water supply interface of the steam generator through the continuous elbow, so that a compensation unit is formed between the main water supply pipeline and the steam generator in a continuous elbow mode to compensate the thermal displacement of the pipeline and the displacement of the steam generator.
Optionally, the continuous elbow includes first pipeline section, second pipeline section, third pipeline section and fourth pipeline section, the one end of first pipeline section is connected with steam generator's water supply interface, the second pipeline section is connected with the other end of first pipeline section and forms first bending in the junction, the third pipeline section links to each other with the other end of second pipeline section and forms the second bending in the junction, the fourth pipeline section links to each other with the other end of third pipeline section and forms the third bending in the junction, the other end of fourth pipeline section with the play water end of main water supply pipeline passes through the check valve and is connected.
Optionally, the first pipe section and the second pipe section are on the same horizontal plane, the first bend bends along the horizontal direction, the second pipe section, the third pipe section and the fourth pipe section are all on the same vertical plane, the fourth pipe section is below the second pipe section, and the second bend and the third bend along the vertical plane direction.
Optionally, the water outlet end of the main water supply pipeline is bent along the horizontal direction to form a fourth bend, and the downstream pipe section of the fourth bend is positioned below the second pipe section, so that the extending direction of the upstream pipe section of the fourth bend is opposite to the extending direction of the first pipe section of the continuous bend.
Optionally, dampers are respectively arranged at the front pipe section, the rear pipe section and the third pipe section of the check valve.
Optionally, an elastic support is arranged outside the continuous bent pipe.
According to another aspect of the invention, there is provided a nuclear power plant steam generator compartment main feed water pipe system comprising a main feed water pipe and a continuous elbow, the water outlet end of the main feed water pipe being connected to one end of the continuous elbow, the other end of the continuous elbow being connected to a feed water interface of a steam generator, such that a compensation unit is formed between the main feed water pipe and the steam generator in the form of a continuous elbow to compensate for pipe thermal displacement and steam generator displacement.
Optionally, the continuous elbow includes first pipeline section, second pipeline section, third pipeline section and fourth pipeline section, the one end of first pipeline section is connected with steam generator's water supply interface, the second pipeline section is connected with the other end of first pipeline section and forms first bending in the junction, the third pipeline section links to each other with the other end of second pipeline section and forms the second bending in the junction, the fourth pipeline section links to each other with the other end of third pipeline section and forms the third bending in the junction, the other end of fourth pipeline section with the play water end of main water supply pipeline passes through the check valve and is connected.
Optionally, the first pipe section and the second pipe section are on the same horizontal plane, the first bend bends along the horizontal direction, the second pipe section, the third pipe section and the fourth pipe section are all on the same vertical plane, the fourth pipe section is below the second pipe section, and the second bend and the third bend along the vertical plane direction.
Optionally, the water outlet end of the main water supply pipeline is provided with a fourth bend bent along the horizontal direction, the downstream pipe section of the fourth bend is positioned below the second pipe section, and the extending direction of the upstream pipe section of the fourth bend is opposite to the extending direction of the first pipe section of the continuous bent pipe.
Optionally, dampers are respectively arranged outside the front pipe section, the rear pipe section and the third pipe section of the check valve.
Optionally, an elastic support is arranged outside the continuous bent pipe.
The beneficial effects are that:
Compared with the prior art, the invention can greatly reduce the number of welding seams in the steam generator compartment, reduce the welding quantity and the engineering quantity, shorten the installation period, reduce the occurrence probability of pipeline system fracture, avoid internal disasters caused by high-energy pipeline fracture and the evacuation of the steam generator caused by pipeline fracture, improve the safety of pipelines in the steam generator compartment, and has the advantages of universality and strong applicability, and is suitable for the arrangement of the main water supply pipelines in the nuclear power station evaporator compartment under different scenes by adjusting the lengths of all pipe sections in the continuous bent pipes and the bending radius of all the bends.
Drawings
Fig. 1 is a schematic view of a nuclear power plant steam generator compartment main feedwater piping system and a method of arranging the same according to an embodiment of the present invention.
In the figure, the water supply port of the 1-steam generator, the 2-continuous bent pipe, the 21-first pipe section, the 22-second pipe section, the 23-third pipe section, the 24-fourth pipe section, the 3-spring bracket, the 4-damper, the 5-check valve and the 6-main water supply pipeline are shown.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, a clear and complete description of the technical solutions of the present invention will be provided below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
In the description of the present invention, it should be noted that, the terms "upper" and the like indicate an orientation or a positional relationship based on the orientation or the positional relationship shown in the drawings, and are merely for convenience and simplicity of description, and do not indicate or imply that the apparatus or element in question must be provided with a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The compensation bending device aims at the problems that in the prior art, a large number of welding lines, complex design, large installation quantity, high installation difficulty, long installation period and the like exist in a main water supply pipeline of a compartment of a nuclear power station steam generator through an elbow. The invention discloses a method for arranging a main water supply pipeline system of a compartment of a steam generator of a nuclear power station, which comprises the following steps: the water outlet end of the main water supply pipeline is connected with a continuous elbow, and then is connected with a water supply interface of the steam generator through the continuous elbow, so that a compensation unit is formed between the main water supply pipeline and the steam generator in a continuous elbow mode to compensate the thermal displacement of the pipeline and the displacement of the steam generator.
Correspondingly, the invention also discloses a compartment main water supply pipeline system of the steam generator of the nuclear power station, which comprises a main water supply pipeline and a continuous bent pipe, wherein the water outlet end of the main water supply pipeline is connected with one end of the continuous bent pipe, and the other end of the continuous bent pipe is connected with a water supply interface of the steam generator, so that a compensation unit is formed between the main water supply pipeline and the steam generator in the form of the continuous bent pipe so as to compensate the thermal displacement of the pipeline and the displacement of the steam generator.
Example 1
As shown in fig. 1, the embodiment discloses a method for arranging a compartment main water supply pipeline system of a steam generator of a nuclear power station, which comprises the steps of connecting a continuous elbow pipe 2 at the water outlet end of a main water supply pipeline 6, and directly connecting the main water supply pipeline and the steam generator through the continuous elbow pipe 2 with a water supply interface 1 of the steam generator, so that a compensation unit is formed between the main water supply pipeline and the steam generator in the form of the continuous elbow pipe to compensate the pipeline thermal displacement and the displacement of the steam generator.
Specifically, the continuous elbow 2 is disposed in the steam generator compartment, the continuous elbow 2 may include a first pipe section 21, a second pipe section 22, a third pipe section 23, and a fourth pipe section 24, one end of the first pipe section 21 is connected to the water supply port 1 of the steam generator, one end of the second pipe section 22 is connected to the other end of the first pipe section 21 and forms a first bend at the junction, one end of the third pipe section 23 is connected to the other end of the second pipe section 22 and forms a second bend at the junction, one end of the fourth pipe section 24 is connected to the other end of the third pipe section 23 and forms a third bend at the junction, and the other end of the fourth pipe section 24 is connected to the water outlet end of the main water supply pipe 6 through the check valve 5. The length of each tube section of the continuous bent tube 2 and the bending radius of each bend are specifically selected according to the space size of the steam generating compartment, for example, the bending radius of each bend of the continuous bent tube may be 2D, which has good adaptability to stress calculation and space requirement, but is not limited thereto.
Furthermore, the respective bends of the continuous bent pipe 2 are arranged as close as possible to the middle of the compartment of the steam generator, for example, the distance between the respective bends and the partition wall of the compartment can be controlled to be more than 1 meter, so as to ensure the arrangement of the same line of people and other objects.
Compared with the prior art, the welding seam does not exist in the pipeline (namely the continuous bent pipe 2) between the check valve and the steam generator, and only four girth welds are needed at most from the water outlet end of the main water supply pipeline to the water supply interface of the steam generator, so that the number of the welding seams can be greatly reduced, the welding quantity and the engineering quantity can be reduced, the installation period can be shortened, the occurrence probability of the breakage of a pipeline system can be reduced, the occurrence of internal disasters caused by the breakage of the high-energy pipeline and the evacuation of the steam generator caused by the breakage of the pipeline at the position can be avoided.
In some embodiments, as shown in fig. 1, the first pipe section 21 and the second pipe section 22 are on the same horizontal plane, the first bend bends along the horizontal direction, the second pipe section 22, the third pipe section 23 and the fourth pipe section 24 are all on the same vertical plane, and the fourth pipe section 24 is below the second pipe section 22, and the second bend and the third bend along the vertical plane direction, so that the arrangement is compact in structure and small in occupied space, and the steam generator main water supply pipeline system has a certain degree of capability of compensating the thermal displacement of the pipeline and the displacement of the steam generator in multiple directions such as up, down, left, right and the like.
In some embodiments, the water outlet end of the main water supply pipeline 6 is bent in the horizontal direction to form a fourth bend, the downstream pipe section of the fourth bend is positioned below the second pipe section 22, and the extending direction of the upstream pipe section of the fourth bend is opposite to the extending direction of the first pipe section 21 of the continuous bend, so that the arrangement is compact in structure and small in occupied space, and the main water supply pipeline system of the steam generator can also have a certain degree of capability of compensating the thermal displacement of the pipeline and the displacement of the steam generator in the front and rear directions.
The bending radius of the fourth bend and the length of the downstream pipe section of the fourth bend are specifically selected according to the space size of the steam generating compartment, for example, the bending radius of the fourth bend may be 2D, which has good adaptability to stress calculation and space requirements, but is not limited thereto. In addition, the fourth bend is arranged at a position close to the middle of the compartment of the steam generator as much as possible, for example, the distance between the fourth bend and the partition wall of the compartment is controlled to be more than 1 meter, so that the arrangement of the same person and other objects is ensured.
In some embodiments, dampers 4 are respectively arranged outside the front pipe section, the rear pipe section and the vertical pipe (namely, the third pipe section 23) in the continuous bent pipe 2 of the check valve 5, so that the displacement exceeding of the high-mass check valve under the earthquake working condition can be avoided, the earthquake load is limited, the earthquake resistance of the main water supply pipeline is improved, and the integrity is ensured under the earthquake working condition.
It should be noted that the damper may be omitted when the space of the steam generator compartment is insufficient, for example, the arrangement position and the size of the stand pipe (i.e., the third pipe section 23) of the continuous bent pipe 2 are insufficient.
In some embodiments, the elastic support 3 is arranged outside the continuous elbow pipe, specifically, the elastic support 3 is preferably arranged outside the upper pipe section (such as the second pipe section 22) of the continuous elbow pipe 2, and the elastic support can support the main water supply pipe and absorb displacement in the vertical direction under different working conditions.
Example 2
As shown in fig. 1, this embodiment discloses a main water supply pipeline system for a compartment of a steam generator of a nuclear power plant, which is configured by adopting the method described in embodiment 1, and includes a main water supply pipeline 6 and a continuous elbow pipe 2, wherein a water outlet end of the main water supply pipeline 6 is connected with one end of the continuous elbow pipe 2, and the other end of the continuous elbow pipe 2 is connected with a water supply interface 1 of the steam generator, so that a compensation unit is formed between the main water supply pipeline and the steam generator in a form of continuous elbow pipe to compensate for pipeline thermal displacement and displacement of the steam generator.
Specifically, the continuous elbow 2 is disposed in the steam generator compartment, the continuous elbow 2 includes a first pipe section 21, a second pipe section 22, a third pipe section 23 and a fourth pipe section 24, one end of the first pipe section 21 is connected to the water supply port 1 of the steam generator, the second pipe section 22 is connected to the other end of the first pipe section 21 and forms a first bend at the junction, the third pipe section 23 is connected to the other end of the second pipe section 22 and forms a second bend at the junction, the fourth pipe section 24 is connected to the other end of the third pipe section 23 and forms a third bend at the junction, and the other end of the fourth pipe section 24 is connected to the water outlet end of the main water supply pipe 6 through the check valve 5. The length of each tube section of the continuous bent tube 2 and the bending radius of each bend are specifically selected according to the space size of the steam generating compartment, for example, the bending radius of each bend of the continuous bent tube 2 may be 2D, which has good adaptability to stress calculation and space requirement, but is not limited thereto.
Compared with the prior art, the pipeline (namely the continuous bent pipe 2) between the check valve and the steam generator in the system is free of welding seams, and only four girth welding seams are needed at most from the water outlet end of the main water supply pipeline to the water supply interface of the steam generator, so that the number of welding seams can be greatly reduced, the welding quantity and the engineering quantity are reduced, the installation period is shortened, the cracking occurrence probability of a pipeline system is reduced, the occurrence of internal disasters caused by high-energy pipeline cracking is avoided, and the evacuation of the steam generator caused by pipeline cracking at the position is avoided.
In some embodiments, each bend of the continuous bent pipe 2 is arranged as close to the middle of the compartment of the steam generator as possible, for example, the distance between the first bend, the second bend and the third bend and the partition wall of the compartment is controlled to be more than 1 meter, so as to ensure the arrangement of the same line of people and other objects.
In some embodiments, as shown in fig. 1, the first pipe section 21 and the second pipe section 22 are on the same horizontal plane, the first bend bends along the horizontal direction, the second pipe section 22, the third pipe section 23 and the fourth pipe section 24 are all on the same vertical plane, and the fourth pipe section 24 is below the second pipe section, and the second bend and the third bend along the vertical plane direction, so that the arrangement is compact in structure and small in occupied space, and the steam generator main water supply pipeline system has a certain degree of capability of compensating the thermal displacement of the pipeline and the displacement of the steam generator in multiple directions such as up, down, left, right and the like.
In some embodiments, the water outlet end of the main water supply pipeline 6 is provided with a fourth bend bent along the horizontal direction, the downstream pipe section of the fourth bend is positioned below the second pipe section 22, and the extending direction of the upstream pipe section of the fourth bend is opposite to the extending direction of the first pipe section 21 of the continuous bent pipe, so that the arrangement is compact in structure and small in occupied space, and the main water supply pipeline system of the steam generator can also have a certain degree of capability of compensating the thermal displacement of the pipeline and the displacement of the steam generator in the front and back directions.
In some embodiments, the front and rear pipe sections of the check valve 5 and the vertical pipe (i.e. the third pipe section 23) in the continuous elbow pipe 2 are respectively provided with a damper 4, so that the displacement of the high-mass check valve under the earthquake working condition can be prevented from exceeding the standard, the earthquake load is limited, the earthquake resistance of the main water supply pipeline is improved, and the integrity is ensured under the earthquake working condition.
In some embodiments, the elastic support 3 is arranged outside the continuous elbow pipe 2, specifically, the elastic support 3 is preferably arranged outside the upper pipe section (such as the second pipe section 22) of the continuous elbow pipe 2, and the elastic support can support the main water supply pipeline and absorb displacement in the vertical direction under different working conditions.
It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present invention, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the invention, and are also considered to be within the scope of the invention.
Claims (12)
1. A method of arranging a nuclear power plant steam generator compartment main feedwater piping system, comprising:
The water outlet end of the main water supply pipeline (6) is connected with the continuous elbow pipe (2), and then the water supply port of the steam generator is connected with the continuous elbow pipe, so that a compensation unit is formed between the main water supply pipeline and the steam generator in the form of the continuous elbow pipe to compensate the thermal displacement of the pipeline and the displacement of the steam generator.
2. Method for arranging a nuclear power plant steam generator compartment main feedwater piping system according to claim 1, characterized in that the continuous elbow comprises a first pipe section (21), a second pipe section (22), a third pipe section (23) and a fourth pipe section (24),
One end of the first pipe section is connected with a water supply interface of the steam generator, the second pipe section is connected with the other end of the first pipe section and forms a first bend at the connecting position,
The third pipe section is connected with the other end of the second pipe section and forms a second bend at the connecting position,
The fourth pipe section is connected with the other end of the third pipe section and forms a third bend at the joint, and the other end of the fourth pipe section is connected with the water outlet end of the main water supply pipeline through a check valve (5).
3. The method of arranging a nuclear power plant steam generator compartment main feedwater piping system of claim 2, wherein said first pipe section and said second pipe section are on the same horizontal plane, said first bend being bent in a horizontal direction;
The second pipe section, the third pipe section and the fourth pipe section are all positioned on the same vertical plane, the fourth pipe section is positioned below the second pipe section, and the second bend and the third bend are bent along the vertical plane direction.
4. A method of arranging a nuclear power plant steam generator compartment main feedwater piping system according to claim 3, wherein the water outlet end of the main feedwater piping is bent in a horizontal direction to form a fourth bend, and the downstream pipe section of the fourth bend is positioned below the second pipe section, with the upstream pipe section of the fourth bend extending in a direction opposite to the direction of extension of the first pipe section of the continuous bend.
5. A method of arranging a main feedwater piping system in a nuclear power plant steam generator compartment according to any of claims 2-4, characterized in that dampers (4) are provided in the front and rear pipe sections and the third pipe section of the check valve, respectively.
6. A method of arranging a main feedwater piping system of a nuclear power plant steam generator compartment according to any of the claims 2-4, characterized in that a resilient support (3) is provided outside the continuous bend.
7. A compartment main water supply pipeline system of a nuclear power station steam generator is characterized by comprising a main water supply pipeline (6) and a continuous elbow pipe (2),
The water outlet end of the main water supply pipeline is connected with one end of the continuous bent pipe, and the other end of the continuous bent pipe is connected with a water supply interface of the steam generator, so that a compensation unit is formed between the main water supply pipeline and the steam generator in a continuous bent pipe mode to compensate the pipeline thermal displacement and the displacement of the steam generator.
8. The nuclear power plant steam generator compartment main feedwater piping system of claim 7, wherein said continuous elbow includes a first pipe segment (), a second pipe segment (), a third pipe segment (), and a fourth pipe segment (),
One end of the first pipe section is connected with a water supply interface of the steam generator, the second pipe section is connected with the other end of the first pipe section and forms a first bend at the connecting position,
The third pipe section is connected with the other end of the second pipe section and forms a second bend at the connecting position,
The fourth pipe section is connected with the other end of the third pipe section and forms a third bend at the joint, and the other end of the fourth pipe section is connected with the water outlet end of the main water supply pipeline through a check valve (5).
9. The nuclear power plant steam generator compartment main feedwater piping system of claim 8, wherein said first pipe section is on the same horizontal plane as said second pipe section, said first bend being bent in a horizontal direction;
The second pipe section, the third pipe section and the fourth pipe section are all positioned on the same vertical plane, the fourth pipe section is positioned below the second pipe section, and the second bend and the third bend are bent along the vertical plane direction.
10. The nuclear power plant steam generator compartment main feedwater piping system of claim 9, wherein the water outlet end of the main feedwater piping is provided with a fourth bend that bends in a horizontal direction, and a downstream pipe section of the fourth bend is located below the second pipe section, and an upstream pipe section of the fourth bend extends in a direction opposite to that of the first pipe section of the continuous bend.
11. A nuclear power plant steam generator compartment main feedwater piping system according to any of claims 8-10, wherein dampers (4) are provided outside the front and rear pipe sections and outside the third pipe section of the check valve, respectively.
12. A nuclear power plant steam generator compartment main feedwater piping system according to any of the claims 8-10, characterised in that the continuous bend is provided with a resilient support (3) outside.
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| CN202510472689.6A CN120280191A (en) | 2025-04-15 | 2025-04-15 | Main water supply pipeline system of compartment of steam generator of nuclear power station and arrangement method of main water supply pipeline system |
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| CN202510472689.6A CN120280191A (en) | 2025-04-15 | 2025-04-15 | Main water supply pipeline system of compartment of steam generator of nuclear power station and arrangement method of main water supply pipeline system |
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