A seismically resistant filtration device for nuclear island ventilation units

Abstract

This utility model discloses a shock-resistant filter device for a nuclear island ventilation unit, comprising a left frame, a rear middle frame, an upper frame, a front middle frame, a right frame, a lower frame, an upper cover plate, a lower cover plate, and a partition plate, all manufactured using sheet metal processes, forming an integral frame structure. A filter is installed between the left and right frames and the partition plate. It also includes a clamping mechanism, which consists of a support, a handle, a connecting rod, a pressure column, bolts, nuts, and a pin. The support of the clamping mechanism is connected to the partition plate via bolt II, spring washer II, and nut II. A guide rod is provided on the partition plate. One end of the pressure plate is clamped and fixed by the bolts and nuts of the clamping mechanism, and the other end of the pressure plate is penetrated by the guide rod. A compression spring is provided on the guide rod, with both ends of the spring connected to the partition plate and the pressure plate, respectively. The clamping mechanism clamps the filter using the pressure plate. This utility model solves the problems of insufficient filtration area, limited airflow, and poor shock resistance caused by parallel arrangement in the prior art.

Description

Technical Field

[0001] The utility model belongs to the technical field of nuclear power plant ventilation and air conditioning systems, and relates to a filtering device for a nuclear island ventilation unit with seismic resistance. Background Technique

[0002] With the development of domestic and foreign nuclear power technologies, the change of national energy policies, and the increasing demand for localization, the R & D demand for filtering devices supporting nuclear power technologies such as the third-generation nuclear power technology, demonstration reactors, and Hualong One is growing day by day. These filtering devices are mainly used to meet the air conditioning requirements of each room in the nuclear island building and the main control room under normal operation and accident conditions (such as loss-of-coolant accident, loss of power, earthquake, etc.) of nuclear power plants. The filtering device installed in the HVAC (heating, ventilation, and air conditioning) system of a nuclear power plant filters the air entering the rooms with cleanliness requirements during the operation of the fan, ensuring that the air reaches a certain cleanliness standard, thereby guaranteeing the safe operation of process equipment and the safe entry and exit of personnel.

[0003] However, in practical applications, due to the large air volume of the HVAC system in nuclear power plants and the limitation of the installation space, the cross-sectional area of some ventilation ducts is small, and the filters arranged side by side result in a reduction in the filtering area, thereby affecting the air volume passing through and not meeting the usage requirements. In addition, considering that the filtering device is installed inside the nuclear power plant, higher requirements are put forward for its service life, operation stability, safety performance, and seismic performance. The prior art such as the patent with the publication number CN202442464U provides a solution with a two-stage filtering function. However, due to the side-by-side arrangement design of its filters, in a limited space or cross-section, the filtering area is relatively small, resulting in a limited air volume that can pass through and making it difficult to meet the needs of using a large air volume.

[0004] Therefore, there is an urgent need in the industry for a new design solution for filtering devices that can achieve large air volume circulation in a limited space while ensuring high filtering efficiency, extending the service life of the equipment, enhancing operation stability and safety, and having excellent seismic performance. This is not only the key to improving the safe operation level of nuclear power plants but also an important issue faced by current heat exchanger manufacturers. Summary of the Invention

[0005] In order to achieve the above object, the utility model provides a filtering device for a nuclear island ventilation unit with seismic resistance, which solves the problems of insufficient filtering area, limited air volume, and poor seismic performance caused by side-by-side arrangement in the prior art.

[0006] To solve the above technical problems, the technical solution adopted by the utility model is: a filtering device for a nuclear island ventilation unit with seismic resistance, including a left frame, a rear middle frame, an upper frame, a front middle frame, a right frame, a lower frame, an upper cover plate, a lower cover plate, and a partition plate made of sheet metal technology to form an overall frame structure.

[0007] Filters are installed between the left frame and the partition, and between the right frame and the partition.

[0008] Furthermore, the filtration device also includes a clamping mechanism, which consists of a support, a handle, a connecting rod, a pressure column, bolts, nuts, and pins.

[0009] The handle is connected to the support via a pin, and the handle is also connected to the connecting rod via another pin; the connecting rod is connected to the pressure column via a corresponding pin; the pressure column can slide along the axial direction of the support, and the pressure column is provided with a threaded hole that mates with a bolt. By screwing in the bolt and fitting a nut, the position of the pressure column can be adjusted and fixed.

[0010] Furthermore, the support of the clamping mechanism is connected to the partition plate via bolt II, spring washer II, and nut II, and a guide rod is provided on the partition plate.

[0011] One end of the pressure plate is clamped and fixed by bolts and nuts of the clamping mechanism, and the other end of the pressure plate is inserted by a guide rod; a compression spring is provided on the guide rod, and the two ends of the compression spring are respectively connected to the partition plate and the pressure plate; the clamping mechanism clamps the filter through the pressure plate.

[0012] Furthermore, the left and right frames of the filter device are respectively installed with the outer frame profile via corresponding sealing gaskets, bolts I, spring washers I, and nuts I.

[0013] The beneficial effects of this utility model are:

[0014] 1. This utility model adopts a W-shaped layout in the same space or frame / wall cross-section, and without changing the wind resistance, which can arrange more filters, achieve large air volume filtration, and meet the air cleanliness requirements.

[0015] 2. This utility model designs a clamping mechanism with a self-locking structure. Depending on the fluid medium, the components can be made of carbon steel or stainless steel. The mechanism is lightweight, easy to operate, easy to install and adjust in position. It can also meet the seismic requirements of nuclear power plants and has high reliability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a front view of the utility model.

[0018] Figure 2 This is the isometric drawing of this utility model.

[0019] Figure 3 This is a cross-sectional view of the present invention along the CC direction.

[0020] Figure 4 This is a cross-sectional view of the present invention along the AA direction.

[0021] Figure 5 This is a magnified view of a portion of the partition structure, shown in Figure U.

[0022] Figure 6 This is a magnified view (V) of the front middle frame structure.

[0023] Figure 7 This is a magnified view of the left frame structure, shown as W.

[0024] Figure 8 This is a schematic diagram of the clamping mechanism.

[0025] Figure 9 This is a top-view sectional view of the present invention in the pressed / open state.

[0026] Figure 10 This is a side sectional view of the present invention in the pressed / open state.

[0027] In the diagram, 1. Left frame, 2. Rear middle frame, 3. Top frame, 4. Front middle frame, 5. Right frame, 6. Bottom frame, 7. Top cover plate, 8. Bottom cover plate, 9. Partition plate, 10. Filter, 11. Clamping mechanism, 11-1. Support, 11-2. Handle, 11-3. Connecting rod, 11-4. Pressure column, 11-5. Bolt, 11-6. Nut, 11-7. Pin, 12. Pressure plate, 13. Compression spring, 14. Guide rod, 15. Outer frame profile, 16. Sealing gasket, 17. Bolt I, 18. Spring washer I, 19. Nut I, 20. Bolt II, 21. Spring washer II, 22. Nut II. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] This utility model provides a shock-resistant filter device for a nuclear island ventilation unit, hereinafter referred to as the filter device. The structure of the filter device is as follows: Figure 1-8As shown, the filter includes a left frame 1, a rear middle frame 2, an upper frame 3, a front middle frame 4, a right frame 5, a lower frame 6, an upper cover plate 7, a lower cover plate 8, and a partition plate 9. All of the above components are sheet metal parts. The frame of the filter device is assembled from the left frame 1, the rear middle frame 2, the upper frame 3, the front middle frame 4, the right frame 5, the lower frame 6, the upper cover plate 7, the lower cover plate 8, and the partition plate 9 through splicing and welding processes to form an integral frame structure. The filter 10 is installed between the left frame 1 and the partition plate 9, and between the right frame 5 and the partition plate 9.

[0030] The filtration device also includes a pressing mechanism 11, which consists of a support 11-1, a handle 11-2, a connecting rod 11-3, a pressure column 11-4, a bolt 11-5, a nut 11-6, and a pin 11-7. The handle 11-2 is connected to the support 11-1 via the pin 11-7, and the handle 11-2 is also connected to the connecting rod 11-3 via another pin 11-7. The connecting rod 11-3 is connected to the pressure column 11-4 via corresponding pins 11-7. The pressure column 11-4 can slide axially along the support 11-1. The pressure column 11-4 is provided with a threaded hole that mates with the bolt 11-5. By screwing in the bolt 11-5 and fitting the nut 11-6, the position of the pressure column 11-4 can be adjusted and fixed.

[0031] The support 11-1 of the clamping mechanism 11 is connected to the partition 9 by bolt II20, spring washer II21, and nut II22. A guide rod 14 is welded on the partition 9. One end of the pressure plate 12 is clamped and fixed by bolt 11-5 and nut 11-6 of the clamping mechanism 11, and the other end of the pressure plate 12 is inserted by the guide rod 14. A compression spring 13 is provided on the guide rod 14, and the two ends of the compression spring 13 are connected to the partition 9 and the pressure plate 12 respectively. The clamping mechanism 11 clamps the filter 10 through the pressure plate 12. The overall structure of the filter device is installed with the outer frame profile 15 by sealing gasket 16, bolt I17, spring washer I18, and nut I19.

[0032] The installation instructions for the filter device are as follows: Figure 9-10 As shown, when in the released state, first install the filter 10 into the corresponding position. Rotate handle 11-2 to make the pressure plate 12 contact the filter 10 and begin to deform, forming an isosceles trapezoid. Continue rotating handle 11-2, and the pressure plate 12 moves forward under the guidance of the pressure column 11-4 and guide rod 14. As handle 11-2 rotates, connecting rod 11-3 and pressure column 11-4 eventually align, at which point the device enters a self-locking state and exhibits excellent shock resistance. In the self-locking state, the pressure plate 12 effectively presses the filters 10 on both sides, ensuring the system's airtightness. Disassembly is the opposite: first, rotate handle 11-2 clockwise, and simultaneously, with the help of the spring 13's rebound force, move the pressure plate 12 backward, thereby releasing the filter 10.

[0033] The working principle of this utility model: the air flow direction is as follows Figure 4 As shown, air flows from one side through filter 10 to the opposite side, achieving a filtration effect and purifying the air. Over time, dust and impurities accumulate on filter 10, requiring periodic replacement to maintain a clean airflow.

[0034] This invention, without altering the installation space or the cross-sectional area of ​​the frame / wall, and while maintaining constant air resistance, adopts a W-shaped layout structure, making the filter 10 more compact and accommodating more filters within the same space. This effectively increases the filtration airflow and meets air cleanliness requirements. Simultaneously, a self-locking clamping mechanism 11 is designed, with components made of carbon steel or stainless steel selected according to the characteristics of the fluid medium. The overall structure is lightweight, easy to operate, and readily installable and positionable, possessing excellent seismic resistance and meeting the high standards of safety and reliability required by nuclear power plants.

[0035] The various embodiments in this specification are described in a related manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0036] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. A filtration device for a nuclear island ventilation unit with seismic resistance, comprising a left frame (1), a rear middle frame (2), an upper frame (3), a front middle frame (4), a right frame (5), a lower frame (6), an upper cover plate (7), a lower cover plate (8), and a partition plate (9) manufactured by sheet metal processing, forming an integral frame structure; characterized in that: A filter (10) is installed between the left frame (1) and the partition (9) and between the right frame (5) and the partition (9).

2. The filter device with anti-vibration for a nuclear island fan unit according to claim 1, characterized in that, The filter device also includes a pressing mechanism (11), which is composed of a support (11-1), a handle (11-2), a connecting rod (11-3), a pressure column (11-4), a bolt (11-5), a nut (11-6), and a pin (11-7); The handle (11-2) is connected to the support (11-1) via a pin (11-7), and the handle (11-2) is connected to the connecting rod (11-3) via another pin (11-7); the connecting rod (11-3) is connected to the pressure column (11-4) via a corresponding pin (11-7); the pressure column (11-4) can slide along the axial direction of the support (11-1), and the pressure column (11-4) is provided with a threaded hole that mates with the bolt (11-5). By screwing in the bolt (11-5) and fitting the nut (11-6), the position of the pressure column (11-4) can be adjusted and fixed.

3. The filter device with anti-vibration for a nuclear island fan unit according to claim 2, characterized in that, The support (11-1) of the clamping mechanism (11) is connected to the partition (9) by bolt II (20), spring washer II (21) and nut II (22), and a guide rod (14) is provided on the partition (9). One end of the pressure plate (12) is clamped and fixed by the bolts (11-5) and nuts (11-6) of the clamping mechanism (11), and the other end of the pressure plate (12) is inserted by the guide rod (14); the guide rod (14) is provided with a compression spring (13), and the two ends of the compression spring (13) are respectively connected to the partition plate (9) and the pressure plate (12); the clamping mechanism (11) clamps the filter (10) through the pressure plate (12).

4. A filtration device for a nuclear island ventilation unit with seismic resistance according to any one of claims 1-3, characterized in that, The left frame (1) and right frame (5) of the filter device are respectively installed with the outer frame profile (15) by corresponding sealing gaskets (16), bolts I (17), spring washers I (18), and nuts I (19).

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