Nuclear grade air handling unit casing opening seal structure

Abstract

The present application relates to the technical field of sealing structure, especially to a nuclear grade air conditioning unit shell opening sealing structure, which comprises: a circular hole is opened on the air conditioning unit shell, and a metal cylinder is passed through the circular hole; the outer end of the metal cylinder is flush with the outer surface of the air conditioning unit shell, and the opening of the inner end is higher than the inner surface of the air conditioning unit shell; a first metal sheet has a central opening, is sleeved on the metal cylinder, and the contact surface of the metal cylinder and the first metal sheet is welded; the first metal sheet is sealingly connected with the inner surface of the air conditioning unit shell; a second metal sheet has a central circular hole, and is sealingly connected with the outer surface of the air conditioning unit shell; a third metal sheet covers the central circular hole of the second metal sheet, and is sealingly connected with the second metal sheet. The present application can guarantee the overall sealing performance of the air conditioning unit after the shell opening. Meanwhile, it is convenient to disassemble, measure and ensure that the heat preservation cotton and other substances in the air conditioning unit shell interlayer will not be brought into the whole plant by the fan.

Description

Technical Field

[0001] This invention relates to the field of sealing structure technology, and in particular to a sealing structure for the opening of the outer casing of a nuclear-grade air conditioning unit. Background Technology

[0002] Important ventilation systems in nuclear power plants, such as the main control room ventilation system, are nuclear-grade ventilation systems responsible for ensuring ventilation in the main control room. The corresponding system boundaries have strict sealing requirements.

[0003] Because routine testing and maintenance are required, measurement holes need to be drilled in the air conditioning unit's casing. This necessitates a sealing and plugging structure that can effectively seal the holes when not in use and allow for easy disassembly when needed. Furthermore, since the air conditioning unit's casing contains insulating materials such as cotton wool, the sealing device must ensure that these materials are not blown into the system by the fan, thus preventing environmental impact. Summary of the Invention

[0004] The technical problem this invention aims to solve is to provide a perforated sealing structure for the outer casing of a nuclear-grade air conditioning unit, which ensures the overall airtightness of the unit after the perforation. It also facilitates disassembly, allows for easy measurement of internal airflow, temperature, humidity, and other parameters, and prevents insulation materials such as the insulating cotton within the outer casing from being carried into the entire factory building by the fan.

[0005] This invention provides a sealing structure for the opening of a nuclear-grade air conditioning unit casing, comprising: a metal cylinder, a first metal sheet, a second metal sheet, a third metal sheet, and an air conditioning unit casing;

[0006] The air conditioning unit has a circular hole in its outer casing, through which a metal cylinder passes.

[0007] The outer end of the metal cylinder is flush with the outer surface of the air conditioning unit casing, and the opening at its inner end protrudes from the inner surface of the air conditioning unit casing.

[0008] The first metal sheet has a central hole and is fitted onto a metal cylinder, with the contact surfaces of the metal cylinder and the first metal sheet being welded together.

[0009] The first metal sheet is sealed to the inner surface of the air conditioning unit casing;

[0010] The second metal sheet has a circular hole in the center and is sealed to the outer surface of the air conditioning unit casing.

[0011] The third metal sheet covers the circular hole in the center of the second metal sheet and is sealed to the second metal sheet.

[0012] Preferably, there is no gap between the metal cylinder and the inner wall of the circular hole in the outer casing of the air conditioning unit.

[0013] Preferably, the first metal sheet is connected to the inner surface of the air conditioning unit housing by rivets, and a first sealing gasket is provided between the first metal sheet and the inner surface of the air conditioning unit housing.

[0014] Preferably, the rivets are evenly distributed along the outer edge of the first metal sheet.

[0015] Preferably, the diameter of the circular hole at the center of the second metal sheet is equal to the outer diameter of the metal cylinder.

[0016] Preferably, the second metal sheet is connected to the outer surface of the air conditioning unit housing by rivets, and a second sealing gasket is provided between the second metal sheet and the inner surface of the air conditioning unit housing.

[0017] Preferably, the third metal sheet is connected to the second metal sheet by bolts, and a third sealing gasket is provided between the third metal sheet and the second metal sheet.

[0018] Preferably, the bolts are evenly distributed on a circumference.

[0019] Preferably, there are 8 to 12 rivets.

[0020] Preferably, there are 6 to 10 bolts.

[0021] Compared with the prior art, the nuclear-grade air conditioning unit outer shell opening sealing structure of the present invention can effectively seal the opening of the air conditioning unit outer shell, effectively ensuring the airtightness of the air conditioning unit and ventilation system, and is easy to disassemble when it is necessary to measure relevant parameters inside the air conditioning unit; at the same time, it can ensure that the insulation material in the outer shell layer of the air conditioning unit will not be blown into the factory building when the air conditioning unit is running. Attached Figure Description

[0022] Figure 1 A schematic diagram showing the sealing structure of the outer casing of a nuclear-grade air conditioning unit;

[0023] Figure 2 This represents the view from direction B.

[0024] Figure 3 Indicates the view from direction A;

[0025] In the picture,

[0026] 1-Metal cylinder, 2-First metal sheet, 3-Second metal sheet, 4-Third metal sheet, 5-Air conditioner unit casing, 6-First sealing gasket, 7-Second sealing gasket, 8-Third sealing gasket, 9-Rivet, 10-Bolt. Detailed Implementation

[0027] To further understand the present invention, embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, and not for limiting the present invention.

[0028] An embodiment of the present invention discloses a sealing structure for the opening of the outer casing of a nuclear-grade air conditioning unit, such as... Figure 1 As shown, it includes: a metal cylinder 1, a first metal sheet 2, a second metal sheet 3, a third metal sheet 4, and an air conditioning unit casing 5;

[0029] The air conditioning unit casing 5 has a round hole, through which the metal cylinder 1 passes;

[0030] The outer end of the metal cylinder 1 is flush with the outer surface of the air conditioning unit housing 5, and the opening at its inner end protrudes from the inner surface of the air conditioning unit housing 5.

[0031] The outer diameter of the metal cylinder 1 is preferably 30-40 mm.

[0032] The first metal sheet 2 has a central hole and is fitted onto the metal cylinder 1. The contact surfaces of the metal cylinder 1 and the first metal sheet 2 are welded together.

[0033] The first metal sheet 2 is sealed to the inner surface of the air conditioning unit casing 5;

[0034] The second metal sheet 3 has a round hole in the center, and the second metal sheet 3 is sealed to the outer surface of the air conditioning unit housing 5;

[0035] The third metal sheet 4 covers the circular hole in the center of the second metal sheet 3 and is sealed to the second metal sheet 3.

[0036] The following is a detailed description of the opening and sealing structure of the outer casing of a nuclear-grade air conditioning unit.

[0037] The metal cylinder 1 passes through the circular hole opened on the air conditioner unit housing 5. During installation, it is inserted from the inner surface of the air conditioner unit housing 3 towards the outer surface until the metal cylinder 1 contacts the outer surface of the air conditioner unit housing 5.

[0038] The outer end of the metal cylinder 1 is flush with the outer surface of the air conditioning unit housing 5, and the opening at its inner end protrudes from the inner surface of the air conditioning unit housing 5.

[0039] The opening at the inner end of the metal cylinder 1 is higher than the inner surface of the air conditioning unit outer shell 5, which can prevent the insulation material in the interlayer of the air conditioning unit outer shell from being blown into the factory.

[0040] To ensure a tight seal, there is no gap between the metal cylinder 1 and the inner wall of the circular hole in the air conditioning unit housing 5, ensuring close contact.

[0041] The first metal sheet 2 has a central hole and is fitted onto the metal cylinder 1. The contact surfaces of the metal cylinder 1 and the first metal sheet 2 are welded together.

[0042] The first metal sheet 2 is sealed to the inner surface of the air conditioning unit housing 5; specifically, the first metal sheet is connected to the inner surface of the air conditioning unit housing 5 by rivets 9, and a first sealing gasket 6 is provided between the first metal sheet 2 and the inner surface of the air conditioning unit housing 5.

[0043] like Figure 2 As shown, the rivets 9 are evenly distributed along the outer edge of the first metal sheet 2. Preferably, there are 8 to 12 rivets 9.

[0044] The first metal sheet 1 can be of various shapes, preferably square.

[0045] The second metal sheet 3 has a round hole in the center, and the second metal sheet 3 is sealed to the outer surface of the air conditioning unit housing 5.

[0046] Preferably, the diameter of the circular hole at the center of the second metal sheet 3 is equal to the outer diameter of the metal cylinder 1.

[0047] The second metal sheet 3 is connected to the outer surface of the air conditioning unit housing 5 by rivets 9, and a second sealing gasket 7 is provided between the second metal sheet 3 and the inner surface of the air conditioning unit housing 5.

[0048] like Figure 3 As shown, the rivets 9 are evenly distributed along the outer edge of the second metal sheet 3. Preferably, there are 8 to 12 rivets 9.

[0049] The second metal sheet 3 can be of various shapes, preferably square. The second metal sheet 3 provides a fixing point for the third metal sheet 4, preventing the third metal sheet 4 from frequently opening and closing and damaging the air conditioning unit casing 5.

[0050] The third metal sheet 4 covers the circular hole in the center of the second metal sheet 3 and is sealed to the second metal sheet 3.

[0051] Specifically, the third metal sheet 4 and the second metal sheet 3 are connected by bolts, and a third sealing gasket 8 is provided between the third metal sheet 4 and the second metal sheet 3.

[0052] like Figure 3 As shown, the bolts 10 are evenly distributed on a circumference.

[0053] The bolts 10 are preferably provided in numbers of 6 to 10.

[0054] Whenever it is necessary to measure the internal parameters of the air conditioning unit, simply remove the third metal plate 4, and insert the measuring instrument probe through the inside of the metal cylinder 1 to measure the parameters from the outside of the unit.

[0055] After the parameters are measured, the third metal sheet 4 can be reinstalled onto the second metal sheet 4. However, the third sealing gasket 8 between the two needs to be replaced in time to ensure the airtightness of the air conditioning unit and ventilation system.

[0056] The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0057] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sealing structure for the opening of a nuclear-grade air conditioning unit casing, characterized in that, include: Metal cylinder, first metal sheet, second metal sheet, third metal sheet, air conditioner unit casing; The air conditioning unit has a circular hole in its outer casing, through which a metal cylinder passes. The outer end of the metal cylinder is flush with the outer surface of the air conditioning unit casing, and the opening at its inner end protrudes from the inner surface of the air conditioning unit casing. The first metal sheet has a central hole and is fitted onto a metal cylinder, with the contact surfaces of the metal cylinder and the first metal sheet being welded together. The first metal sheet is sealed to the inner surface of the air conditioning unit casing; The second metal sheet has a circular hole in the center and is sealed to the outer surface of the air conditioning unit casing. The third metal sheet covers the circular hole in the center of the second metal sheet and is sealed to the second metal sheet. There is no gap between the metal cylinder and the inner wall of the circular hole in the outer casing of the air conditioning unit; The first metal sheet is connected to the inner surface of the air conditioning unit housing by rivets, and a first sealing gasket is provided between the first metal sheet and the inner surface of the air conditioning unit housing. The second metal sheet is connected to the outer surface of the air conditioning unit housing by rivets, and a second sealing gasket is provided between the second metal sheet and the inner surface of the air conditioning unit housing; The third metal sheet is connected to the second metal sheet by bolts, and a third sealing gasket is provided between the third metal sheet and the second metal sheet.

2. The nuclear-grade air conditioning unit casing opening sealing structure according to claim 1, characterized in that, The rivets are evenly distributed along the outer edge of the first metal sheet.

3. The nuclear-grade air conditioning unit casing opening sealing structure according to claim 1, characterized in that, The diameter of the circular hole at the center of the second metal sheet is equal to the outer diameter of the metal cylinder.

4. The nuclear-grade air conditioning unit casing opening sealing structure according to claim 1, characterized in that, The bolts are evenly distributed on a circumference.

5. The nuclear-grade air conditioning unit casing opening sealing structure according to claim 1, characterized in that, The number of rivets is 8 to 12.

6. The nuclear-grade air conditioning unit casing opening sealing structure according to claim 1, characterized in that, The number of bolts is 6 to 10.

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