Rapid cooling mechanism of containment

Abstract

The utility model relates to a rapid cooling mechanism of a containment vessel, which comprises an inner containment vessel, a cooling structure is arranged outside the inner containment vessel, a circulating structure is arranged outside the cooling structure, the cooling structure comprises two cooling pipes, and the two cooling pipes are arranged in the circulating structure. The opposite sides of the two cooling pipes are fixedly connected with the left side and the right side of an inner-layer containment correspondingly, concrete is fixedly installed at the bottom of the inner-layer containment, an outer-layer containment is fixedly installed at the top of the concrete, and a water tank is fixedly installed at the top of the outer-layer containment. A butt joint pipe with one end penetrating and extending into the water tank is fixedly mounted at the tops of the two cooling pipes. According to the rapid cooling mechanism of the containment vessel, the cooling structure is arranged, so that the purpose of rapidly cooling the inner containment vessel is achieved, the amount of steam released into the containment vessel is reduced, and the pressure and temperature in the containment vessel are at a relatively low level.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling equipment, in particular to a rapid cooling mechanism for a containment shell. Background Art

[0002] Water cooling equipment is a cooling water equipment that can provide constant temperature, constant flow and constant pressure. Water chillers are divided into air-cooled chillers and water-cooled chillers. The nuclear reactor containment is the outermost building of the pressurized water reactor. It refers to the outer shell building that contains most of the systems and equipment of the nuclear steam supply system. It is used to accommodate the reactor pressure vessel and some safety systems, completely isolating it from the external environment, hoping to achieve the function of a safety protection barrier. When a reactor loss of water accident or a main steam pipe rupture occurs, the containment needs to be cooled by water cooling equipment to ensure the integrity of the containment structure.

[0003] According to the patent with publication number CN107123448B, a containment cooling system capable of improving the utilization rate of coolant is proposed. In the containment cooling system capable of improving the utilization rate of coolant, a cooling water tank is arranged above the containment, and the cooling water can flow to the spray head through the first connecting pipe under the action of gravity, and then be sprayed out by the spray head to realize the passive cooling of the containment. In this scheme, the spray head is arranged in the said gap, so that the cooling water can be fully contacted with the outer wall of the containment as much as possible, so as to improve the cooling effect of the containment, and at the same time, it is convenient to collect the cooling water after participating in the heat exchange for recycling. However, the containment cooling system capable of improving the utilization rate of coolant cools the containment by spraying cooling water through the spray head, so that the cooling speed of the containment is slow, which is not conducive to the repair of the nuclear reactor. Therefore, a rapid cooling mechanism of the containment is proposed to solve the above problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a rapid cooling mechanism for a containment shell, which has the advantage of rapidly cooling the containment shell and solves the problem that the containment shell cooling system, which can improve the utilization rate of the coolant, cools the containment shell by spraying cooling water through a sprinkler head, so that the cooling speed of the containment shell is slow, which is not conducive to the repair of the nuclear reactor.

[0005] To achieve the above object, the utility model provides the following technical solutions: a rapid cooling mechanism for a containment shell, comprising an inner containment shell, a cooling structure is arranged outside the inner containment shell, and a circulation structure is arranged outside the cooling structure;

[0006] The cooling structure includes two cooling pipes, and the opposite sides of the two cooling pipes are fixedly connected to the left and right sides of the inner containment shell respectively. Concrete is fixedly installed on the bottom of the inner containment shell, and the outer containment shell is fixedly installed on the top of the concrete. A water tank is fixedly installed on the top of the outer containment shell, and a butt-joint pipe with one end penetrating and extending into the inside of the water tank is fixedly installed on the top of the two cooling pipes, and an electric valve is fixedly installed on the outer surface of the butt-joint pipe.

[0007] Furthermore, the circulation structure includes two water outlet pipes, one end of the two water outlet pipes penetrates and extends to the interior of the cooling pipe, water pumps are fixedly installed on opposite sides of the two water outlet pipes, connecting pipes are fixedly installed on opposite sides of the two water pumps, outer shells are fixedly installed on opposite sides of the two connecting pipes, radiators are fixedly installed on opposite side walls of the inner cavities of the two outer shells, fans are fixedly installed between the inner top walls and inner bottom walls of the two outer shells, and circulation pipes with one end penetrating and extending to the interior of the water tank are fixedly installed on opposite sides of the two outer shells.

[0008] Furthermore, twelve cooling pipes are provided, and the twelve cooling pipes are evenly distributed when viewed from top to bottom.

[0009] Furthermore, the water tank is a rectangular parallelepiped with a hollow interior.

[0010] Furthermore, a movable hole is opened inside the outer containment shell, and the inner surface of the movable hole is fixedly connected to the outer surface of the water outlet pipe.

[0011] Furthermore, the radiator is a spiral plate heat exchanger.

[0012] Furthermore, a filter screen is fixedly installed between the inner top wall and the inner bottom wall of the shell.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0014] The rapid cooling mechanism of the containment shell achieves the purpose of rapidly cooling the inner containment shell by providing a cooling structure, thereby reducing the amount of steam released into the containment shell, making the pressure and temperature in the containment shell at a lower level. By providing a circulation structure, the cooling water is recycled, and there is no need to supplement cooling water, which is convenient for users. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a top view cross-sectional view of the inner containment shell of the utility model structure;

[0017] Figure 3It is a right side cross-sectional view of the structural shell of the utility model.

[0018] In the figure: 1. inner containment; 2. cooling structure; 201. cooling pipe; 202. concrete; 203. outer containment; 204. water tank; 205. docking pipe; 206. electric valve; 3. circulation structure; 301. water outlet pipe; 302. water pump; 303. connecting pipe; 304. outer shell; 305. radiator; 306. fan; 307. circulation pipe. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-3 A rapid cooling mechanism for a containment shell in this embodiment includes an inner containment shell 1, a cooling structure 2 is arranged outside the inner containment shell 1, a circulation structure 3 is arranged outside the cooling structure 2, the cooling structure 2 includes two cooling pipes 201, opposite sides of the two cooling pipes 201 are respectively fixedly connected to the left and right sides of the inner containment shell 1, concrete 202 is fixedly installed at the bottom of the inner containment shell 1, an outer containment shell 203 is fixedly installed on the top of the concrete 202, a water tank 204 is fixedly installed on the top of the outer containment shell 203, and a large amount of cooling water is stored inside, a butt pipe 205 with one end penetrating and extending into the water tank 204 is fixedly installed on the top of the two cooling pipes 201, and the cooling water flows into the cooling pipe 201 through the butt pipe 205, and an electric valve 206 is fixedly installed on the outer surface of the butt pipe 205 to control the switch of the butt pipe 205.

[0021] Among them, twelve cooling pipes 201 are provided, and the twelve cooling pipes 201 are evenly distributed when viewed from top to bottom, thereby improving the cooling efficiency of the containment.

[0022] The water tank 204 is a rectangular parallelepiped with a hollow interior, which is convenient for storing cooling water.

[0023] Specifically, the electric valve 206 is opened to allow the cooling water in the water tank 204 to flow into the cooling pipe 201 through the docking pipe 205, quickly cooling the inner containment 1, thereby reducing the amount of steam released into the containment, so that the pressure and temperature in the containment are at a lower level.

[0024] In this embodiment, the circulation structure 3 includes two water outlet pipes 301, one end of the two water outlet pipes 301 passes through and extends to the interior of the cooling pipe 201, water pumps 302 are fixedly installed on opposite sides of the two water outlet pipes 301, connecting pipes 303 are fixedly installed on opposite sides of the two water pumps 302, the water pumps 302 pump cooling water into the connecting pipes 303 through the water outlet pipes 301, shells 304 are fixedly installed on opposite sides of the two connecting pipes 303, radiators 305 are fixedly installed on opposite side walls of the inner cavities of the two shells 304, the radiators 305 cool the hot water, fans 306 are fixedly installed between the inner top wall and the inner bottom wall of the shell 304, the fans 306 cool the radiators 305, circulation pipes 307 with one end passing through and extending to the interior of the water tank 204 are fixedly installed on opposite sides of the two shells 304, and the cooled cooling water is discharged into the interior of the water tank 204 through the circulation pipes 307.

[0025] Among them, a movable hole is opened inside the outer containment shell 203, and the inner surface of the movable hole is fixedly connected to the outer surface of the water outlet pipe 301, so as to facilitate the installation of the water outlet pipe 301.

[0026] The radiator 305 is a spiral plate heat exchanger, which improves the heat dissipation effect of the radiator 305 .

[0027] A filter is fixedly installed between the inner top wall and the inner bottom wall of the outer shell 304 to prevent dust from entering the outer shell 304 .

[0028] Specifically, start the water pump 302, so that the hot water flows into the radiator 305 through the water outlet pipe 301 and the connecting pipe 303, and the radiator 305 cools the hot water. The radiator 305 is cooled by the fan 306, and the cooled cooling water is discharged into the water tank 204 through the circulation pipe 307, so that the cooling water can be recycled without the need for additional cooling water, which is convenient for users.

[0029] The working principle of the above embodiment is:

[0030] (1) After a reactor loss of coolant accident or a main steam pipe rupture occurs, the electric valve 206 is opened to allow the cooling water in the water tank 204 to flow into the cooling pipe 201 through the docking pipe 205, thereby rapidly cooling the inner containment 1.

[0031] (2) Start the water pump 302, so that the hot water flows into the radiator 305 through the outlet pipe 301 and the connecting pipe 303. The radiator 305 cools the hot water. The radiator 305 is cooled by the fan 306. The cooled cooling water is discharged into the water tank 204 through the circulation pipe 307, so that the cooling water can be recycled.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rapid cooling mechanism for a containment shell, comprising an inner containment shell (1), characterized in that: A cooling structure (2) is arranged outside the inner containment shell (1), and a circulation structure (3) is arranged outside the cooling structure (2); The cooling structure (2) comprises two cooling pipes (201), the opposite sides of the two cooling pipes (201) are respectively fixedly connected to the left and right sides of the inner containment shell (1), the bottom of the inner containment shell (1) is fixedly installed with concrete (202), the top of the concrete (202) is fixedly installed with an outer containment shell (203), the top of the outer containment shell (203) is fixedly installed with a water tank (204), and the top of the two cooling pipes (201) is fixedly installed with a butt-joint pipe (205) with one end penetrating through and extending into the inside of the water tank (204), and the outer surface of the butt-joint pipe (205) is fixedly installed with an electric valve (206).

2. A rapid cooling mechanism for a containment shell according to claim 1, characterized in that: The circulation structure (3) comprises two water outlet pipes (301), one end of the two water outlet pipes (301) penetrates and extends into the interior of the cooling pipe (201), a water pump (302) is fixedly installed on the opposite sides of the two water outlet pipes (301), a connecting pipe (303) is fixedly installed on the opposite sides of the two water pumps (302), a shell (304) is fixedly installed on the opposite sides of the two connecting pipes (303), a radiator (305) is fixedly installed on the opposite side walls of the inner cavities of the two shells (304), a fan (306) is fixedly installed between the inner top wall and the inner bottom wall of the two shells (304), and a circulation pipe (307) with one end penetrating and extending into the interior of the water tank (204) is fixedly installed on the opposite sides of the two shells (304).

3. A rapid cooling mechanism for a containment shell according to claim 1, characterized in that: Twelve cooling pipes (201) are provided, and the twelve cooling pipes (201) are evenly distributed when viewed from top to bottom.

4. A rapid cooling mechanism for a containment shell according to claim 1, characterized in that: The water tank (204) is a rectangular parallelepiped with a hollow interior.

5. A rapid cooling mechanism for a containment vessel according to claim 2, characterized in that: A movable hole is provided inside the outer containment shell (203), and the inner surface of the movable hole is fixedly connected to the outer surface of the water outlet pipe (301).

6. A rapid cooling mechanism for a containment vessel according to claim 2, characterized in that: The radiator (305) is a spiral plate heat exchanger.

7. A rapid cooling mechanism for a containment vessel according to claim 2, characterized in that: A filter screen is fixedly installed between the inner top wall and the inner bottom wall of the outer shell (304).

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