Heat dissipation self-sealing structure for nuclear power station and fan module

Abstract

The utility model provides a heat dissipation self-sealing structure for a nuclear power station and a fan module, and belongs to the technical field of electrical equipment, the heat dissipation self-sealing structure comprises an outer frame body, a blade group and an elastic reset structure, the outer frame body is used for being installed at an air opening of a draught fan. The outer frame body is provided with an installation cavity penetrating in the airflow flowing direction. The blade group is arranged in the mounting cavity; the blade group comprises a plurality of blades which are distributed in parallel at intervals; the two ends of each blade are rotationally connected with the outer frame body. And the elastic reset structure is arranged between the blade group and the outer frame body. According to the heat dissipation self-sealing structure for the nuclear power station, when a draught fan fails and stops, the blade set is in a closed state under the action of the elastic reset structure, at the moment, each blade is in lap joint with the adjacent blade to block the installation cavity and prevent hot air from entering the interior of equipment through the installation cavity, and therefore hot air backflow is avoided, and the service life of the equipment is prolonged. And normal heat dissipation and operation of equipment are ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical equipment, and more specifically, relates to a heat dissipation self-enclosed structure and a fan module for a nuclear power station. Background Art

[0002] Electrical equipment that mainly uses air cooling will adopt a multi-fan exhaust cooling method to improve the equipment's heat dissipation efficiency, and if a single fan fails, it will not affect the normal operation of the equipment.

[0003] In the prior art, due to the installation position of the fan and the layout requirements of the internal parts of the electrical equipment, when a single fan fails, there will be wind resistance at the air outlet of the failed fan, and the hot air cannot be discharged immediately, causing the hot air to flow back from the blades and gaps of the failed fan and enter the interior of the equipment, affecting the heat dissipation and normal operation of the equipment. Utility Model Content

[0004] The utility model aims to provide a heat dissipation self-enclosed structure and a fan module for a nuclear power plant, aiming to solve the technical problem in the prior art that hot air flows back into the equipment after the fan fails.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a heat dissipation self-enclosed structure for a nuclear power plant, comprising:

[0006] The outer frame is used to be installed at the air outlet of the fan; the outer frame has an installation cavity that passes through along the air flow direction;

[0007] A blade group is arranged in the installation cavity; the blade group includes a plurality of parallel and spaced blades; both ends of each blade are rotatably connected to the outer frame; and

[0008] An elastic reset structure is arranged between the blade group and the outer frame;

[0009] Wherein, when the fan is working normally, the blade group is in an open state under the action of airflow, and there is a ventilation gap between each blade and the adjacent blade; when the fan is stopped, the blade group is in a closed state under the action of the elastic reset structure, and each blade overlaps with the adjacent blade to block the installation cavity.

[0010] In a possible implementation, in the closed state, each of the blades overlaps with the adjacent blades.

[0011] In a possible implementation, the blade includes:

[0012] A cylindrical portion, both ends of which are rotatably connected to the outer frame; and

[0013] A lapping part, which is connected to the cylindrical part; the lapping part has an arc-shaped lapping surface adapted to the outer peripheral surface of the cylindrical part; in the closed state, the arc-shaped lapping surface overlaps and laps with the outer peripheral surface of the cylindrical part.

[0014] In some embodiments, the blade further includes:

[0015] A middle straight plate part, which is connected between the cylindrical part and the lapping part.

[0016] In some embodiments, a notch is provided on the cylindrical part, and the notch penetrates along the rotation axis of the cylindrical part.

[0017] In some embodiments, the lapping part is an arc-shaped plate structure.

[0018] In a possible implementation manner, fixed shafts are respectively provided on the outer frame body corresponding to both ends of each blade, and the end part of the blade is rotatably sleeved on the fixed shaft.

[0019] In some embodiments, the elastic reset structure includes:

[0020] A plurality of torsional elastic members, which correspond to the plurality of fixed shafts one by one; each torsional elastic member is sleeved on the corresponding fixed shaft, and the end part is connected to the corresponding blade.

[0021] In a possible implementation manner, the outer frame body is fixedly arranged at the air inlet of the fan.

[0022] The beneficial effect of the heat dissipation self-enclosed structure for nuclear power plants provided by the present utility model is that: compared with the prior art, in the heat dissipation self-enclosed structure for nuclear power plants of the present utility model, the outer frame body is arranged at the air outlet of the fan, and a blade group composed of a plurality of blades is arranged in the installation cavity of the outer frame body. When the fan is working normally, the blade group is in an open state under the action of the airflow, and at this time, there is a ventilation gap between each blade and the adjacent blade, and the hot air is extracted by the fan; when the fan fails and stops running, the blade group is in a closed state under the action of the elastic reset structure, and at this time, each blade laps with the adjacent blade to block the installation cavity and prevent the hot air from entering the interior of the equipment through the installation cavity, thereby avoiding the hot air from flowing back and ensuring the normal heat dissipation and operation of the equipment.

[0023] The present utility model also provides a fan module, including:

[0024] A housing; and

[0025] At least two fans, which are arranged in the housing at intervals; wherein, the heat dissipation self-enclosed structure for nuclear power plants as described above is arranged at the air outlet of each fan.

[0026] For the fan module provided by the present utility model, since the above-mentioned heat dissipation self-sealing structure for nuclear power plants is installed at the air outlet of each fan, it can prevent hot air from flowing back into the equipment when the fan fails, ensuring normal heat dissipation and operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 It is a schematic structural diagram of the heat dissipation self-sealing structure for nuclear power plants provided by the embodiment of the present utility model;

[0029] Figure 2 It is a schematic structural diagram of the blade group of the heat dissipation self-sealing structure for nuclear power plants provided by the embodiment of the present utility model (the blade group in the figure is in the open state);

[0030] Figure 3 It is a schematic structural diagram of a single blade of the heat dissipation self-sealing structure for nuclear power plants provided by the embodiment of the present utility model;

[0031] Figure 4 It is a schematic structural diagram of the fan module provided by the embodiment of the present utility model;

[0032] Figure 5 It is a schematic cross-sectional structure of the fan module provided by the embodiment of the present utility model Figure 1 (the blade group in the figure is in the open state);

[0033] Figure 6 It is a schematic cross-sectional structure of the fan module provided by the embodiment of the present utility model Figure 1 (the blade group in the figure is in the closed state).

[0034] In the figure: 1. Outer frame; 2. Blade; 21. Cylindrical part; 211. Notch; 22. Lapping part; 221. Arc-shaped lapping surface; 23. Intermediate straight plate part; 3. Torsional elastic part; 4. Fixed shaft; 5. Fan; 6. Housing. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model more clear, the following further details the present utility model in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0036] Please refer to Figures 1 to 6 together. Now, an explanation will be given to the heat dissipation self - closing structure for nuclear power plants provided by the present utility model. The heat dissipation self - closing structure for nuclear power plants includes an outer frame body 1, a blade group, and an elastic reset structure. The outer frame body 1 is used to be installed at the air outlet of a fan 5; the outer frame body 1 has an installation cavity that penetrates along the air flow direction; the blade group is arranged in the installation cavity; the blade group includes a plurality of blades 2 that are parallel and spaced apart; both ends of each blade 2 are respectively rotatably connected to the outer frame body 1; the elastic reset structure is arranged between the blade group and the outer frame body 1.

[0037] Among them, when the fan 5 is operating normally, the blade group is in an open state under the action of the air flow. There is a ventilation gap between each blade 2 and the adjacent blade 2; when the fan 5 stops operating, the blade group is in a closed state under the action of the elastic reset structure, and each blade 2 overlaps with the adjacent blade 2 to block the installation cavity.

[0038] The structure of the outer frame body 1 is adapted to the structure at the air outlet of the fan 5, and is designed to completely wrap the air outlet so that hot air will not overflow from the edge of the outer frame body 1. The above - mentioned air outlet can be the air inlet of the fan 5 or the air outlet. That is to say, the outer frame body 1 can be installed at the air inlet of the fan 5 or at the air outlet of the fan 5.

[0039] The plurality of blades 2 are respectively rotatably connected to the outer frame body 1, and the rotation direction is perpendicular to the air flow direction. The rotation method can adopt the shaft rotation commonly used in the prior art.

[0040] The elastic reset structure is arranged between the blade group and the outer frame body 1. When there is no air flow, the elastic reset structure is used to make each blade 2 rotate back. The elastic reset structure can be at least one of many elastic members such as a linear spring, a torsion spring, a spring sheet, etc. The specific form of the elastic reset structure is not limited in this embodiment.

[0041] When the fan 5 is operating normally, the hot air after heat dissipation will impact each blade 2 under the suction of the fan 5, causing the blade 2 to rotate and overcoming the elastic force of the elastic reset structure to keep each blade 2 in an open state. At this time, the elastic reset structure stores energy, and the hot air passes through the ventilation gap and is discharged from the equipment, as Figure 5 shown.

[0042] When the fan 5 stops operating, the air flow no longer flows, the blade group is no longer impacted by the air flow, the elastic reset structure releases energy, causing each blade 2 to rotate back, and each blade 2 can overlap with the adjacent blade 2. As Figure 6 shown, there is no gap between every two adjacent blades 2, and the two blades 2 on both sides can also overlap with the inner wall of the outer frame body 1, thus completely blocking the installation cavity to prevent air flow from passing through.

[0043] In the prior art, in order to improve the heat dissipation effect, multiple fans 5 are installed on the equipment. For the airflow mode of bottom air inlet and top air outlet, due to the limitation of the installation position of the fan 5, there is a certain distance between the fan 5 and the top wall of the equipment housing 6. When a single fan 5 fails, wind resistance will be formed on the upper part of the fan 5, and the hot air cannot be discharged immediately. In a short period of time, a large amount of hot air will accumulate between the fan 5 and the top wall of the equipment housing 6, and the hot air extracted by the normally working fan 5 will also gather there, causing the hot air to flow back from the blades 2 and gaps of the failed fan 5 and enter the interior of the equipment.

[0044] In order to solve the above technical problems, the utility model provides a self-sealing heat dissipation structure for a nuclear power plant. When the fan 5 is working normally, the blade group is in an open state under the action of the airflow. At this time, there is a ventilation gap between each blade 2 and the blade 2 adjacent to it, and the hot air is drawn out by the fan 5; when the fan 5 fails to stop, the blade group is in a closed state under the action of the elastic reset structure. At this time, each blade 2 is overlapped with the blade 2 adjacent to it to seal the installation cavity, preventing the hot air from passing through the installation cavity into the interior of the equipment, thereby avoiding hot air backflow and ensuring normal heat dissipation and operation of the equipment.

[0045] In some embodiments, the blade assembly may be configured as follows: Figure 6 The structure shown, see Figure 6 In the closed state, each blade 2 overlaps with the adjacent blade 2. The overlapping overlap allows an overlapping portion between the two blades 2, ensuring that there is no gap between the two blades 2 in the closed state, and airflow cannot pass through.

[0046] See also Figure 2 and Figure 3 On the basis of the above embodiment, the blade 2 includes a cylindrical portion 21 and a lap portion 22. Both ends of the cylindrical portion 21 are rotatably connected to the outer frame 1 respectively; the lap portion 22 is connected to the cylindrical portion 21; the lap portion 22 has an arcuate lap surface 221 adapted to the outer circumference of the cylindrical portion 21; in the closed state, the arcuate lap surface 221 overlaps and laps the outer circumference of the cylindrical portion 21.

[0047] The cylindrical portion 21 is used for rotational connection with the two side walls of the outer frame 1. The overlapping portion 22 is designed as an arc structure, which is used to adapt to the outer surface of the cylindrical portion 21. In the closed state, the arc-shaped overlapping surface 221 overlaps with the outer peripheral surface of the cylindrical portion 21. On the one hand, the overlapping overlap area can be increased to ensure the tightness of the sealing. On the other hand, when the blade group switches from the open state to the closed state, it can ensure that the two blades 2 overlap smoothly to avoid hard collision.

[0048] See also Figure 2 and Figure 3, on the basis of the above embodiments, the blade 2 further includes an intermediate straight plate portion 23. The intermediate straight plate portion 23 is connected between the cylindrical portion 21 and the overlapping portion 22.

[0049] The intermediate straight plate portion 23 serves to increase the width of the blade 2, so that the number of blades 2 in the blade group can be correspondingly reduced, and the distance between two adjacent blades 2 can be increased. On the one hand, it can avoid interference between the two cylindrical portions 21 and the overlapping portion 22 in the closed state. On the other hand, in the open state, it can also increase the width of the ventilation gap.

[0050] In addition, adding the intermediate straight plate portion 23 also makes the blade 2 easy to be manufactured and formed, and simplifies the manufacturing mold.

[0051] In some embodiments, the above cylindrical portion 21 can adopt the structure as Figure 3 shown, see Figure 3 , a notch 211 is provided on the cylindrical portion 21, and the notch 211 penetrates along the rotation axis direction of the cylindrical portion 21.

[0052] Providing the notch 211 on the cylindrical portion 21 enables the cylindrical portion 21 to undergo slight deformation, so as to facilitate rotational assembly with the two side walls of the outer frame body 1. Moreover, it can also simplify the structure of the blade 2 and make it easy to be formed.

[0053] Preferably, the overlapping portion 22 is an arc-shaped plate structure. Therefore, the entire blade 2 is a thin plate structure, and the blade 2 is made of aluminum alloy material, so that the blade 2 is light in weight and can be pushed to rotate and open under the flow of air.

[0054] In some embodiments, the above blade 2 and the outer frame body 1 can adopt the structure as shown in 2 and Figure 3 shown, see Figure 2 and Figure 3 , fixed shafts 4 are respectively provided on the outer frame body 1 corresponding to both ends of each blade 2, and the ends of the blade 2 are rotatably sleeved on the fixed shafts 4.

[0055] The fixed shafts 4 are fixedly arranged on the side walls of the outer frame body 1, and the cylindrical portions 21 are sleeved on the fixed shafts 4 and rotate by means of the fixed shafts 4, so as to simplify the assembly manner between the blade 2 and the outer frame body 1 and the structure of the outer frame body 1.

[0056] In some embodiments, the above elastic reset structure can adopt the structure as shown in 2 and Figure 3 shown, see Figure 2 and Figure 3 , the elastic reset structure includes a plurality of torsional elastic members 3, and the plurality of torsional elastic members 3 correspond to the plurality of fixed shafts 4 one by one; each torsional elastic member 3 is sleeved on the corresponding fixed shaft 4, and the end is connected to the corresponding blade 2.

[0057] The elastic reset structure adopts a torsional elastic member 3, and the torsional elastic member 3 can be fixed by means of a fixed shaft 4. Compared with a linear spring or a shrapnel, the torsional elastic member 3 does not need to be directly connected to the outer frame body 1. It is sleeved on the fixed shaft 4, does not occupy extra space, and is convenient for assembly. Moreover, the torsional elastic member 3 can make the rotation of the blade 2 more stable.

[0058] In some embodiments, the above-mentioned outer frame body 1 can adopt a structure as shown in Figure 4 See Figure 4 , and the outer frame body 1 is fixedly arranged at the air inlet of the fan 5.

[0059] The outer frame body 1 is fixedly arranged at the air inlet of the fan 5. That is to say, the outer frame body 1 is arranged inside the equipment housing 6 and is far from the top wall of the housing 6. Although there is a distance between the air outlet of the fan 5 and the top wall of the housing 6, this distance may cause interference for installing the outer frame body 1 and is not convenient for assembly operations. Therefore, in this embodiment, the outer frame body 1 is installed at the air inlet of the fan 5. Moreover, the wind speed is high and the air volume is large at the air inlet, which can ensure the stable open state of the blade 2 under the airflow.

[0060] Please refer to Figures 4 to 6 , based on the same inventive concept, the embodiment of the present application also provides a fan module, which includes a housing 6 and at least two fans 5. The at least two fans 5 are arranged at intervals inside the housing 6; wherein, the above-mentioned heat dissipation self-enclosed structure for nuclear power plants is arranged at the air outlet of each fan 5.

[0061] For the fan module provided by the present utility model, the above-mentioned heat dissipation self-enclosed structure for nuclear power plants is arranged at the air outlet of each fan 5. When the fan 5 is working normally, the blade group is in an open state under the action of the airflow. At this time, there is a ventilation gap between each blade 2 and the adjacent blade 2, and the hot air is extracted by the fan 5; when the fan 5 fails and stops running, the blade group is in a closed state under the action of the elastic reset structure. At this time, each blade 2 overlaps with the adjacent blade 2 to block the installation cavity and prevent the hot air from entering the interior of the equipment through the installation cavity, thereby avoiding the hot air from flowing back and ensuring the normal heat dissipation and operation of the equipment.

[0062] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A heat dissipation self - enclosed structure for a nuclear power plant, characterized in that, include: The outer frame (1) is used to be installed at the air outlet of the fan (5); the outer frame (1) has an installation cavity that passes through along the airflow direction; A blade group is arranged in the installation cavity; the blade group comprises a plurality of blades (2) arranged in parallel and spaced apart; both ends of each blade (2) are rotatably connected to the outer frame (1); as well as An elastic reset structure, arranged between the blade assembly and the outer frame (1); Wherein, when the fan (5) is working normally, the blade group is in an open state under the action of airflow, and a ventilation gap exists between each blade (2) and the blade (2) adjacent thereto; when the fan (5) is stopped, the blade group is in a closed state under the action of the elastic reset structure, and each blade (2) overlaps with the blade (2) adjacent thereto to seal the installation cavity.

2. The heat dissipation self-sealing structure for a nuclear power plant according to claim 1, characterized in that, In the closed state, each blade (2) overlaps with the adjacent blade (2).

3. The heat dissipation self-enclosed structure for a nuclear power plant according to claim 1 or 2, characterized in that, The blade (2) comprises: A cylindrical portion (21), both ends of which are rotatably connected to the outer frame (1); and The overlapping portion (22) is connected to the cylindrical portion (21); the overlapping portion (22) has an arc-shaped overlapping surface (221) adapted to the outer peripheral surface of the cylindrical portion (21); in the closed state, the arc-shaped overlapping surface (221) overlaps with the outer peripheral surface of the cylindrical portion (21).

4. The heat dissipation self - closed structure for a nuclear power plant according to claim 3, characterized in that, The blade (2) further comprises: The middle straight plate portion (23) is connected between the cylindrical portion (21) and the overlapping portion (22).

5. The heat dissipation self-closed structure for a nuclear power plant according to claim 3, characterized in that, The cylindrical portion (21) is provided with a notch (211), and the notch (211) penetrates the cylindrical portion (21) along the rotation axis.

6. The heat dissipation self-sealing structure for a nuclear power plant according to claim 3, wherein, The overlapping portion (22) is an arc-shaped plate structure.

7. The heat dissipation self-sealing structure for a nuclear power plant according to claim 1, characterized in that, The outer frame (1) is provided with fixed shafts (4) at both ends corresponding to each of the blades (2), and the ends of the blades (2) are rotatably sleeved on the fixed shafts (4).

8. The heat dissipation self-sealing structure for a nuclear power plant according to claim 7, characterized in that, The elastic reset structure comprises: The plurality of torsion elastic members (3) correspond one-to-one to the plurality of fixed shafts (4); each of the torsion elastic members (3) is sleeved on the corresponding fixed shaft (4), and an end portion is connected to the corresponding blade (2).

9. The heat dissipation self-sealing structure for a nuclear power plant according to claim 1, characterized in that, The outer frame (1) is fixedly arranged at the air inlet of the fan (5).

10. A fan module, characterized in that, include: Housing (6); as well as At least two fans (5) are arranged at intervals inside the housing (6); wherein the air outlet of each fan (5) is provided with a heat dissipation self-enclosed structure for a nuclear power plant according to any one of claims 1 to 9.

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