Shock wave protection device

Abstract

The invention discloses a shock wave protection device which comprises a frame body installed on a building wall and a plurality of protection modules arranged in the frame body, the protection modules are distributed at intervals in the vertical direction, and each protection module comprises a first protection part. The first protection piece comprises a first grid and a second grid, one end of the second grid is connected to the first grid, the opposite side faces of the first grid and the second grid form an included angle a, and a ranges from 60 degrees to 120 degrees. According to the shock wave protection device, the protection module can reduce the pressure of shock waves layer by layer under the condition that ventilation is guaranteed, so that the shock wave protection device achieves a shock wave protection effect on safety-level equipment in a nuclear power plant room, and the shock wave protection device does not need to be provided with a movement element for movement of a valve blade structure; therefore, the cost of the shock wave protection device is reduced, and meanwhile, the problem of shock resistance failure of the shock wave protection device caused by motion failure of the valve blade structure is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear power, and in particular to a shock wave protection device. Background Art

[0002] The design of safety-level buildings or structures in nuclear power plants must take into account the impact of external explosion shock waves and ensure that they maintain integrity under the action of external explosion shock waves to ensure that the functions of important safety items inside are not affected. In order to cope with the impact of external explosion shock waves and protect the equipment in the nuclear island from external overpressure damage, nuclear power plants widely use anti-shock wave valve designs, which are composed of frames and valve cores. The anti-shock wave valve is installed at the boundary between the nuclear island ventilation system and the outside world. When an explosion shock wave occurs in the outside world and the pressure difference on both sides of the valve exceeds the operating pressure difference, the valve core moves to close the air flow channel and block the shock wave on the outside to avoid damage to the safety-level equipment in the plant. However, relying on the action of the valve core to achieve shock wave blocking is prone to malfunction and has low reliability. In addition, the valve core, the core component of the anti-shock wave valve, is an imported product with high procurement costs. Summary of the invention

[0003] The main purpose of the present invention is to provide a shock wave protection device, aiming to solve the technical problem of how to improve the effective protection of the shock wave protection device while reducing the cost of the shock wave protection device.

[0004] To achieve the above object, the present invention provides a shock wave protection device, comprising:

[0005] A frame body, adapted to be installed on a building wall, the building wall having a first side and a second side arranged opposite to each other along a first direction, the frame body being configured to be able to communicate with the first side and the second side;

[0006] A plurality of protection modules are located inside the frame, and each of the protection modules is spaced apart in the vertical direction, each of the protection modules comprises a first protection member, the first protection member comprises a first grille and a second grille connected to the first grille at one end, and the sides of the first grille and the second grille facing each other form an angle a, a=60°-120°.

[0007] In some embodiments, the first protective member has a first open end, and the first open end faces the vertical direction or the first direction.

[0008] In some embodiments, the protective module also includes a second protective member, which is distributed along a second direction with the first protective member, the second direction is perpendicular to the first direction, the second protective member includes a third grid and a fourth grid connected to the third grid at one end, and the sides of the third grid and the fourth grid facing each other form an angle b, b=60°-120°.

[0009] In some embodiments, the first protective member and the second protective member are spaced apart and distributed along the second direction, the first protective member has a first open end, the second protective member has a second open end, and the second open end faces opposite to the first open end;

[0010] Alternatively, the second opening end and the first opening end have the same orientation.

[0011] In some embodiments, the first protective member includes a first open end and a first closed end disposed opposite to the first open end, the second protective member includes a second open end and a second closed end disposed opposite to the second open end, the second closed end is connected to the first closed end, and the first open end faces away from the second open end.

[0012] In some embodiments, along the vertical direction, the first protective member and the second protective member have a distance δ1 at one end close to the first side, and the first protective member and the second protective member have a distance δ2 at one end close to the second side, wherein δ1≤150mm, δ2≤150mm.

[0013] In some embodiments, the first protective member includes a first open end and a first closed end opposite to the first open end, the opening of the first open end faces upward, the first closed end has a plurality of drainage holes, each of the drainage holes penetrates the first closed end, and each of the drainage holes is spaced apart in a direction perpendicular to the vertical direction and the first direction;

[0014] And / or, the second protective member includes a second open end and a second closed end arranged opposite to the second open end, the opening of the second open end faces upward, and the second closed end has a plurality of drainage holes, each of the drainage holes passes through the second closed end, and each of the drainage holes is arranged at intervals along a direction perpendicular to the vertical direction and the first direction.

[0015] In some embodiments, the frame body includes a plurality of frames, each of the frames is installed on the building wall along the first direction, and each of the frames is provided with a plurality of the protection modules spaced apart along the vertical direction.

[0016] In some embodiments, the first protective member includes a first open end and a first closed end disposed opposite to the first open end, the first open end faces the first direction, and along the first direction, the first open ends of adjacent first protective members face opposite directions, and adjacent first closed ends are disposed oppositely;

[0017] Alternatively, the first opening end faces the vertical direction, and along the first direction, the first opening ends of adjacent first protective members face opposite directions;

[0018] Alternatively, the first opening end of one of the first protective members adjacent to each other along the first direction faces the moving direction of the shock wave, and the first opening end of the other one faces the vertical direction.

[0019] In some embodiments, the first side is defined as a side of the building wall close to the shock wave, and the second side is defined as a side of the building wall away from the shock wave. In the protection module close to the second side, the first protection member includes a first open end and a first closed end arranged opposite to the first open end, and the first open end faces the first side; and an end of the first grille or the second grille away from the first closed end is located at a first position;

[0020] Among the multiple protection modules distributed along the vertical direction close to the first side, there is a spacing area along the vertical direction between adjacent protection modules and close to the second side, and the projection formed by the spacing area on the projection plane perpendicular to the first direction covers the projection formed by the first position on the projection plane.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] In the technical solution of the present invention, the shock wave protection device includes a frame that can be installed on the wall of a building and a plurality of protection modules arranged inside the frame. Since the protection modules are spaced apart in the vertical direction, the air can flow between the indoor and outdoor through the gaps between adjacent protection modules. When the outdoor shock wave acts on the shock wave protection device, since one end of the first grille is connected to the second grille and the sides of the first grille and the second grille facing each other form an angle a, a=60°-120°, most of the shock wave is attenuated under the obstruction of the first grille and the second grille, and since the angle a=60°-120°, it is ensured that there is always a gap between the first protection parts of adjacent protection modules to facilitate the circulation of indoor air and outdoor air. In the related art, a valve leaf structure that can move under the action of the shock wave is used, thereby blocking the path of the shock wave from the outdoor to the indoor to avoid the shock wave from affecting indoor safety matters. Compared with the related art, in the present application, the shock wave protection device does not need to be provided with a moving element for the movement of the valve leaf structure, thereby reducing the cost of the shock wave protection device and avoiding the problem of shock resistance failure of the shock wave protection device due to movement failure of the valve leaf structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 It is a schematic structural diagram of a shock wave protection device in one embodiment of the present invention;

[0025] Figure 2 The shock wave protection device according to the first embodiment of the present invention is Figure 1 Sectional view cut along the AA direction;

[0026] Figure 3 It is a schematic diagram of the principle of shock wave attenuation between adjacent protection modules spaced apart in the vertical direction in one embodiment of the present invention;

[0027] Figure 4 It is a top view of the first protective member in one embodiment of the present invention; wherein the first protective member is provided with a drainage hole;

[0028] Figure 5 The shock wave protection device according to the second embodiment of the present invention is Figure 1 A cross-sectional view cut along the AA direction; wherein there are a plurality of protective modules distributed at intervals along the first direction and the vertical direction;

[0029] Figure 6 The shock wave protection device according to the third embodiment of the present invention is Figure 1 A cross-sectional view cut along the AA direction; wherein, in adjacent protective modules along the first direction, the first opening end and the second opening end are oriented in the same or opposite directions;

[0030] Figure 7 The shock wave protection device according to the fourth embodiment of the present invention is Figure 1 A cross-sectional view cut along the AA direction; wherein, in adjacent protection modules along the first direction, at least some of the first protection elements correspond to the second protection elements one by one;

[0031] Figure 8 The shock wave protection device according to the fifth embodiment of the present invention is Figure 1 Sectional view cut along the AA direction;

[0032] Fig. 9 The shock wave protection device according to the sixth embodiment of the present invention is Figure 1 Sectional view cut along the AA direction;

[0033] Fig.10Schematic diagram of the principle of shock wave attenuation between adjacent protective modules spaced apart in the vertical direction and the first direction in another embodiment of the present invention; wherein, an end of the first grid close to the second side away from the first closed end is located at a first position, and a spacing area is provided between adjacent protective modules close to the first side, and a projection formed by the spacing area on the projection surface covers a projection formed by the first position on the projection surface;

[0034] Fig.11 This is a schematic diagram of the results of monitoring the explosion shock wave attenuation effect of the shock wave protection device of certain embodiments of the present invention using a shock wave tester.

[0035] Description of Figure Numbers:

[0036] Shock wave protection device 100;

[0037] Frame 110; Frame 111;

[0038] Protection module 120;

[0039] First protection member 121; first grille 1211; second grille 1212; first open end 1213;

[0040] first closed end 1214; first position 1215;

[0041] The second protection member 122; the third grille 1221; the fourth grille 1222; the second opening end 1223;

[0042] A second closed end 1224;

[0043] Drain hole 123;

[0044] spacing area 124;

[0045] first side 200;

[0046] Second side 300;

[0047] Shockwave 400;

[0048] First direction X; second direction Y; vertical direction Z.

[0049] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] The building walls of the safety-level buildings or structures of nuclear power plants are usually provided with vents to ensure the air circulation of the nuclear power plants. However, when the explosion source outside the nuclear power plant explodes and generates shock waves, the shock waves can easily enter the nuclear power plant through the vents, causing damage to the safety-level equipment in the plant. In order to ensure that the safety-level buildings or structures of nuclear power plants maintain integrity under the action of external explosion shock waves, so as to ensure that the functions of important safety items inside are not affected, in the relevant technology, nuclear power plants widely adopt the design of anti-shock wave valves (safety-level equipment), which are installed at the boundary between the nuclear island ventilation system and the outside world. The anti-shock wave valve adopts a self-powered mechanical drive mode, which consists of a frame and a valve core, etc. Multiple valve cores with the same performance are installed in parallel on a fixed frame. The frame is used to install and support the valve core and withstand the huge impact force transmitted by the valve core. The anti-shock wave valve is embedded in the concrete structure of the building wall through its frame. Anti-shock wave valves are widely used in the ventilation system of nuclear power plants, and are generally installed in the holes at the air inlet and exhaust of the ventilation system. In the normal ventilation state, the valve leaf is in the middle of the valve, and the airflow flows through the surrounding cavities to maintain normal ventilation in the room. When an explosion shock wave occurs outside, and the pressure difference on both sides of the valve exceeds the valve leaf action pressure difference, the valve leaf will move to the normal pressure side end face, fit with the inner side of the valve body, close the airflow channel, and block the shock wave on the outside to avoid damage to the safety-level equipment in the factory. When the pressure on both sides of the valve is lower than the action pressure difference, the valve leaf returns to the middle of the valve body to ensure normal ventilation function. However, the valve core design of the anti-shock wave valve in the related art is complex, resulting in high design and manufacturing costs and material costs of the anti-shock wave valve. In addition, if the shock wave is blocked by relying on the action of the valve core, the anti-shock wave valve is easily affected by foreign objects (such as flying objects generated during the explosion) and malfunctions, which may cause the anti-shock wave valve to fail and have low reliability. In addition, the valve core structure of the anti-shock wave valve in the related art is complex, usually relying on imported procurement, with a long procurement cycle and a high price for imported valve cores, which limits the production efficiency of the anti-shock wave valve. The valve leaf of the anti-shock wave valve will only move to close the valve when the pressure difference on both sides of the valve exceeds the operating pressure difference. Therefore, the anti-shock wave valve in the related technology cannot provide protection against explosion shock waves below the rated pressure difference.

[0052] In the related art, an anti-shock wave shutter valve is also used to protect the safety-level equipment in the factory. The anti-shock wave shutter valve includes a frame and a plurality of vertically arranged blades. The plurality of blades are arranged in parallel in the frame. The blades are provided with a rotating shaft. The blades are connected to the frame through the rotating shaft. The blades are provided with an elastic reset mechanism. Under normal circumstances, the airflow can pass between adjacent blades to achieve the purpose of ventilating the factory. When an explosion shock wave occurs in the outside world, the high-speed airflow hits the blades, causing the blades to rotate around the rotating shaft, closing the passages between adjacent blades, and achieving the purpose of resisting the shock wave. After the shock wave disappears, the blades can be restored under the action of the elastic reset mechanism. However, the anti-shock wave shutter valve has a complex structure, high manufacturing cost, great installation difficulty, and is not easy to operate and maintain. The blade elastic reset mechanism is complex in design, and as the service life of the anti-shock wave shutter valve increases, it is prone to failure and has low reliability. In addition, the blade will only act when the pressure difference on both sides of the blade exceeds the action pressure difference. Therefore, the anti-shock wave shutter valve cannot provide protection against explosion shock waves below the rated pressure difference.

[0053] For this reason, please see Figures 1 to 10 The present invention provides a shock wave protection device 100, which includes a frame 110 and a plurality of protection modules 120 located inside the frame 110, wherein the material used by the frame 110 includes but is not limited to carbon structural steel, low alloy structural steel, and austenitic stainless steel. The frame 110 can be installed on a building wall, and the installation method of the frame 110 on the building wall can be welding, anchor bolts, etc. The building wall has a first side 200 and a second side 300 arranged opposite to each other along a first direction X, and the frame 110 is configured to be able to connect the first side 200 and the second side 300. It should be noted that, in some embodiments, the first side 200 of the building wall can be located indoors, the second side 300 can also be located indoors, and the safety-level equipment in the nuclear power plant can be located indoors on the first side 200, or indoors on the second side 300. In other embodiments, the first side 200 of the building wall can be located outdoors, the second side 300 can be located indoors, and the safety-level equipment in the nuclear power plant can be located indoors on the second side 300. The setting of the frame 110 can fix the protection module 120 and decompose the pressure of the shock wave 400.

[0054] See also Figure 2 and Figure 3, each protective module 120 includes a first protective member 121, and the first protective member 121 can be connected to the frame 110 by welding. The first protective member 121 includes a first grille 1211 and a second grille 1212 connected to the first grille 1211 at one end. The connection between the first grille 1211 and the second grille 1212 can be welded, and the first grille 1211 and the second grille 1212 can also be integrally formed. The sides facing each other of the first grille 1211 and the second grille 1212 form an angle a, a=60°-120°, and the sides facing each other of the first grille 1211 and the second grille 1212 are not perpendicular to the vertical direction Z. It should be noted that the specific value of the angle a is mainly determined by comprehensively considering the reduction of the shock wave in the space defined by the first grille 1211 and the second grille 1212 and the ventilation requirements of the factory. For example, the angle a can be 60°, 75°, 90°, 105°, and 120°, etc. The thickness D1 of the first grid 1211 and the second grid 1212 is 3-15 mm, and the thickness of the second grid 1212 may be equal to or different from the thickness of the first grid 1211. The materials used by the first grid 1211 and the second grid 1212 may be the same as or different from the material of the frame 110. The direction perpendicular to the first direction X and the vertical direction Z is defined as the third direction, and the plane perpendicular to the third direction is defined as the projection plane. The length L1 of the projection shape formed by the first grid 1211 and the second grid 1212 on the projection plane is 100-300 mm, and the length of the projection shape of the second grid 1212 may be equal to or different from the length of the projection shape of the first grid 1211.

[0055] The protection modules 120 are spaced apart in the vertical direction Z, so that under normal circumstances (without explosion shock wave 400), air can flow from the first side 200 to the second side 300 or from the second side 300 to the first side 200 through the gaps between adjacent protection modules 120, thereby ensuring the air circulation in the nuclear power plant. Figure 3When the shock wave 400 acts on the shock wave protection device 100, before the shock wave 400 passes through the gap between the adjacent protection modules 120, the shock wave 400 is blocked and reduced by the first grid 1211 and the second grid 1212, so that the attenuated shock wave 400 enters the gap between the adjacent protection modules 120 and is reflected and offset by the sidewalls of the first grid 1211 or the second grid 1212, and then the attenuated shock wave 400 enters the spacious (relative to the narrow gap between the adjacent protection modules 120) nuclear power plant through the narrow gap between the adjacent protection modules 120, and the shock wave 400 is attenuated again and cannot cause damage to the safety-level equipment in the nuclear power plant. The shock wave protection device 100 of the present application does not need to be provided with a moving element for the movement of the valve leaf structure, thereby reducing the cost of the shock wave protection device 100, and avoiding the problem that the shock wave protection device 100 fails to protect the shock wave 400 due to the failure of the movement of the valve leaf structure.

[0056] The first protection member 121 has a first open end 1213, and the first open end 1213 faces the vertical direction Z or the first direction X. In some embodiments, see Figure 6, the first open end 1213 of each first protective member 121 faces upward or downward, and each first protective member 121 is spaced apart along the vertical direction Z along each protective module 120. One of the first grid 1211 and the second grid 1212 is close to the first side 200, and the other is close to the second side 300. For ease of description, it is defined that the first grid 1211 is located on the side close to the first side 200, and the second grid 1212 is located on the side close to the second side 300. The thickness of the second grid 1212 can be greater than the thickness of the first grid 1211. When the shock wave 400 acts on the shock wave protection device 100, the side of the first grid 1211 close to the first side 200 can reflect the shock wave 400 to reduce the pressure of the shock wave 400. After a part of the shock wave 400 enters the gap between the adjacent protection modules 120, the shock wave 400 is blocked by the wall of the first grid 1211 and the second grid 1212 facing the gap and is reflected again and canceled out. Therefore, the pressure of the shock wave 400 entering the nuclear power plant through the gap between the adjacent protection modules 120 is attenuated, thereby realizing the protection of the safety-level equipment in the nuclear power plant from the shock wave 400. It should be noted that the smaller the angle a is, the smaller the space defined by the first grid 1211 and the second grid 1212 is. When the distance between the adjacent first protection elements 121 is uniquely determined, the better the attenuation effect of the shock wave 400 in the space is. However, the smaller the spacing between the adjacent first protection elements 121 for ventilation is, the smaller the air circulation area of ​​the corresponding nuclear power plant is. Therefore, considering the attenuation effect of the shock wave 400 and the air circulation requirements of the nuclear power plant, the angle a is not less than 60°. The larger the angle a is, the larger the space defined by the first grille 1211 and the second grille 1212 is, the weaker the resistance of the first grille 1211 and the second grille 1212 to the shock wave 400 is, and the weaker the attenuation effect of the shock wave 400 in the space is. The larger the spacing between adjacent first protective elements 121 for ventilation is, the larger the air circulation area of ​​the nuclear power plant is. Therefore, considering the attenuation effect of the shock wave 400 and the air circulation requirements of the nuclear power plant, the angle a is not greater than 120°.

[0057] In some further embodiments, see Figure 2 and Fig. 9 The first opening end 1213 of each first protective member 121 faces the first direction X and faces away from the moving direction of the shock wave 400 .

[0058] See also Figures 2 to 10, the protection module 120 also includes a second protection member 122, and the second protection member 122 and the first protection member 121 are distributed along the second direction Y, and the second direction Y is perpendicular to the first direction X. In some embodiments, the second direction Y is parallel to the vertical direction Z, and in other embodiments, the second direction Y is perpendicular to the vertical direction Z and the first direction X. The second protection member 122 includes a third grid 1221 and a fourth grid 1222 connected to the third grid 1221 at one end, and the sides of the third grid 1221 and the fourth grid 1222 facing each other form an angle b, b = 60°-120°. Exemplarily, the angle b can be 60°, 70°, 80°, 90°, 100°, 110°, and 120°, etc. In some embodiments, the angle b is equal to the angle a. In other embodiments, the angle b is not equal to the angle a. It should be noted that the material used for the third grid 1221 and the fourth grid 1222 can be the same as or different from the material used for the frame 110. Figure 2 The thickness D2 of the third grid 1221 and the fourth grid 1222 is 3-15 mm. The thickness of the third grid 1221 and the fourth grid 1222 may be equal to or different from the thickness of the first grid 1211 .

[0059] The length L2 of the projection shape formed by the third grid 1221 and the fourth grid 1222 on the projection plane is 100-300 mm.

[0060] In some embodiments, the second protective member 122 and the first protective member 121 are spaced apart along the second direction Y, and the second protective member 122 has a second open end 1223, and the direction of the second open end 1223 is opposite to or the same as the direction of the first open end 1213. In other embodiments, the first protective member 121 includes a first open end 1213 and a first closed end 1214 arranged opposite to the first open end 1213, and the second protective member 122 includes a second open end 1223 and a second closed end 1224 arranged opposite to the second open end 1223, and the second closed end 1224 is connected to the first closed end 1214, and the first open end 1213 is away from the second open end 1223. The connection between the second closed end 1224 and the first closed end 1214 can be a welding connection. The first grid 1211, the second grid 1212, the third grid 1221 and the fourth grid 1222 can be prepared by an integral molding method, so that the first closed end 1214 and the second closed end 1224 are integrally molded. In some embodiments, see Figure 3, the first opening end 1213 and the second opening end 1223 face the vertical direction Z, and the first grid 1211 and the third grid 1221 are defined to be located on the side close to the first side 200, the second grid 1212 and the fourth grid 1222 are located on the side close to the second side 300, and the first side 200 is located on the side close to the shock wave 400. Among them, one end of the first grid 1211 is connected to one end of the second grid 1212, one end of the third grid 1221, and one end of the fourth grid 1222. When the shock wave 400 acts on the shock wave protection device 100, the shock wave 400 is first blocked and attenuated by the wall surface of the first grid 1211 and the third grid 1221 close to the first side 200. When the attenuated shock wave 400 enters the gap between adjacent protection modules 120, the shock wave 400 is reflected by the walls of the first grid 1211, the second grid 1212, the third grid 1221 and the fourth grid 1222 close to the gap, causing the shock wave 400 to cancel each other out, thereby attenuating the shock wave 400 again.

[0061] See also Figure 3 Along the vertical direction Z, the first protective member 121 and the second protective member 122 have a distance δ1 at one end close to the first side 200 , and the first protective member 121 and the second protective member 122 have a distance δ2 at one end close to the second side 300 , wherein δ1≤150mm, δ2≤150mm.

[0062] Exemplarily, computational fluid dynamics methods are used to analyze the explosion shock wave attenuation effect of the following four embodiments, where a=b=90°, D1=D2=3mm, L1=L2=200mm, the incident shock wave 400 has a peak value of 20kPa, and the positive pressure time is 300ms.

[0063] Embodiment 1: Along the vertical direction Z, the spacing between adjacent protection modules 120 is δ1=160 mm, δ2=160 mm;

[0064] Embodiment 2: Along the vertical direction Z, the spacing between adjacent protection modules 120 is δ1=150 mm, δ2=150 mm;

[0065] Embodiment 3: Along the vertical direction Z, the spacing between adjacent protection modules 120 is δ1=100 mm, δ2=100 mm;

[0066] Embodiment 4: Along the vertical direction Z, the spacing between adjacent protection modules 120 is δ1=50 mm, δ2=50 mm;

[0067] The incident shock wave 400 enters the second side 300 through the shock wave protection device 100 of the present application from the first side 200. The analysis results show that the shock wave protection devices 100 in the above four embodiments can attenuate the shock wave 400. For details, please refer to Fig.11 , the shock wave 400 attenuation effect decreases as the spacing between adjacent protection modules 120 decreases, and the shock wave 400 pressure peak and positive pressure time gradually decrease. The shock wave 400 attenuation effect is significantly weakened when the spacing between adjacent protection modules 120 is greater than 150mm. When the spacing is 160mm, there is a significant difference in the shock wave 400 pressure peak and positive pressure time compared to the spacing of 150mm and below. Therefore, the spacing between adjacent protection modules 120 should not be greater than 150mm. In addition, although the smaller the spacing between the protection modules 120, the better the attenuation effect of the explosion shock wave 400, the size of the spacing between the protection modules 120 is also related to the ventilation requirements of the environment in which they are located. The minimum spacing between the protection modules 120 must meet the minimum flow cross-sectional area requirements required for the ventilation requirements of the plant.

[0068] See also Figure 4 The first protective member 121 includes a first open end 1213 and a first closed end 1214 arranged opposite to the first open end 1213. The opening of the first open end 1213 faces upward. The first closed end 1214 has a plurality of drainage holes 123. Each drainage hole 123 penetrates the first closed end 1214, and each drainage hole 123 is arranged at intervals in a direction perpendicular to the vertical direction Z and the first direction X.

[0069] And / or, the second protective member 122 includes a second open end 1223 and a second closed end 1224 arranged opposite to the second open end 1223, the opening of the second open end 1223 faces upward, and the second closed end 1224 has a plurality of drainage holes 123, each drainage hole 123 passes through the second closed end 1224, and each drainage hole 123 is arranged at intervals along a direction perpendicular to the vertical direction Z and the first direction X. The arrangement of the drainage holes 123 is conducive to preventing rainwater from accumulating in the protective module 120, causing the protective module 120 to be corroded by rainwater for a long time, thereby causing the impact resistance to decrease. In some embodiments, the first open end 1213 of the first protective member 121 faces upward, the second open end 1223 of the second protective member 122 faces downward, and the first closed end 1214 is connected to the second closed end 1224. Thus, the drainage holes 123 pass through the first closed end 1214 and the second closed end 1224 along the vertical direction Z.

[0070] In some embodiments, see Figures 5 to 9The frame body 110 includes a plurality of frames 111, each frame 111 is installed on a building wall along a first direction X, and a plurality of protective modules 120 spaced apart along a vertical direction Z are arranged in each frame 111. The plurality of protective modules 120 arranged along the first direction X can improve the attenuation degree of the shock wave 400 pressure of the shock wave protection device 100, thereby improving the shock resistance of the shock wave protection device 100. In some embodiments, the first protective member 121 includes a first open end 1213 and a first closed end 1214 arranged opposite to the first open end 1213, and the first open end 1213 faces the first direction X, wherein the direction of the second open end 1223 is opposite to or the same as that of the first open end 1213, and the second closed end 1224 is spaced apart from the first closed end 1214. Along the first direction X, the first open ends 1213 of adjacent first protective members 121 face oppositely, and adjacent first closed ends 1214 are arranged oppositely. In other embodiments, please refer to Figure 7 and Figure 8 , the first open end 1213 faces the vertical direction Z, the second open end 1223 faces the same direction as or opposite to the first open end 1213, and the first closed end 1214 and the second closed end 1224 are spaced apart, and the first open ends 1213 of adjacent first protective members 121 face opposite directions along the first direction X. In some other embodiments, see Fig. 9 , the first open end 1213 of one of the first protective members 121 adjacent to each other along the first direction X faces the moving direction of the shock wave 400, and the first open end 1213 of the other one faces the vertical direction Z, the direction of the second open end 1223 may be the same as or different from the direction of the first open end 1213, and when the direction of the second open end 1223 is opposite to the direction of the first open end 1213, the first closed end 1214 and the second closed end 1224 may be spaced apart or connected to each other. It should be noted that, please refer to Figure 5 and Figure 6 , or see Figure 5 and Figure 7 , or see Figure 5 and Figure 8 , or see Figure 5 and Fig. 9 , the combination forms of the first protective member 121 and the second protective member 122 in the protective modules 120 adjacently arranged along the first direction X may be the same or different. Exemplarily, one of the protective modules 120 adjacently arranged along the first direction X includes a first protective member 121 and a second protective member 122 arranged at intervals, and the other of the protective modules 120 adjacently arranged along the first direction X includes a first protective member 121 and a second protective member 122 connected, that is, a first closed end 1214 and a second closed end 1224 connected.

[0071] The first side 200 is defined as the side of the building wall close to the shock wave 400, and the second side 300 is defined as the side of the building wall away from the shock wave 400. In the protection module 120 close to the second side 300, the first protection member 121 includes a first open end 1213 and a first closed end 1214 arranged opposite to the first open end 1213, and the first open end 1213 faces the first side 200; and the end of the first grid 1211 or the second grid 1212 away from the first closed end 1214 is located at a first position 1215. Among the plurality of protection modules 120 spaced apart along the vertical direction Z close to the first side 200, there is a spacing area 124 between adjacent protection modules 120 and close to the second side 300 along the vertical direction Z, see Fig.10 , the projection formed by the spacing area 124 on the projection plane perpendicular to the first direction X covers the projection formed by the first position 1215 on the projection plane. In some embodiments, the second open end 1223 faces the first side 200, and the end of the third grid 1221 or the fourth grid 1222 away from the second closed end 1224 is located at the second position. The projection formed by the spacing area 124 on the projection plane perpendicular to the first direction X covers the projection formed by the second position on the projection plane.

[0072] For ease of description, the first grid 1211 is defined as being located at a first position 1215. When the shock wave 400 is attenuated by the protection module 120 near the first side 200, while the shock wave 400 flows from the spacing area 124 to the protection module 120 near the second side 300, since the projection of the first position 1215 is within the projection of the spacing area 124, the end of the first grid 1211 near the first side 200 can divert the shock wave 400 located in the spacing area 124, thereby further weakening the pressure of the shock wave 400. That is, a part of the diverted shock wave 400 is reflected and offset between the protective modules 120 arranged adjacent to each other along the first direction X, and another part of the shock wave 400 enters the gap between the adjacent protective modules 120 spaced apart along the vertical direction Z near the second side 300, and is reflected and offset under the obstruction of the first grid 1211, the second grid 1212, the third grid 1221 and the fourth grid 1222. Therefore, the pressure of the shock wave 400 entering the second side 300 can no longer cause harm to the safety-level equipment in the nuclear power plant.

[0073] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0074] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or", "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0075] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A shock wave protection device, characterized in that: include: A frame body, adapted to be installed on a building wall, the building wall having a first side and a second side arranged opposite to each other along a first direction, the frame body being configured to be able to communicate with the first side and the second side; A plurality of protection modules are located inside the frame, and each of the protection modules is spaced apart in the vertical direction, each of the protection modules comprises a first protection member, the first protection member comprises a first grille and a second grille connected to the first grille at one end, and the sides of the first grille and the second grille facing each other form an angle a, a=60°-120°.

2. The shock wave protection device according to claim 1, characterized in that: The first protection member has a first open end, and the first open end faces the vertical direction or the first direction.

3. The shock wave protection device according to claim 1, characterized in that: The protection module also includes a second protection member, which is distributed along a second direction with the first protection member, and the second direction is perpendicular to the first direction. The second protection member includes a third grid and a fourth grid connected to the third grid at one end, and the sides of the third grid and the fourth grid facing each other form an angle b, b=60°-120°.

4. The shock wave protection device according to claim 3, characterized in that: The first protection member and the second protection member are spaced apart from each other along the second direction, the first protection member has a first opening end, the second protection member has a second opening end, and the second opening end faces opposite to the first opening end; Alternatively, the second opening end and the first opening end have the same orientation.

5. The shock wave protection device according to claim 3, characterized in that: The first protective member includes a first open end and a first closed end opposite to the first open end, the second protective member includes a second open end and a second closed end opposite to the second open end, the second closed end is connected to the first closed end, and the first open end faces away from the second open end.

6. The shock wave protection device according to claim 3, characterized in that: Along the vertical direction, a distance δ1 is formed between the first protective member and the second protective member at one end close to the first side, and a distance δ2 is formed between the first protective member and the second protective member at one end close to the second side, wherein δ1≤150 mm, and δ2≤150 mm.

7. The shock wave protection device according to claim 3, characterized in that: The first protective member includes a first open end and a first closed end opposite to the first open end, the opening of the first open end faces upward, the first closed end has a plurality of drainage holes, each of the drainage holes penetrates the first closed end, and each of the drainage holes is arranged at intervals in a direction perpendicular to the vertical direction and the first direction; And / or, the second protective member includes a second open end and a second closed end arranged opposite to the second open end, the opening of the second open end faces upward, and the second closed end has a plurality of drainage holes, each of the drainage holes passes through the second closed end, and each of the drainage holes is arranged at intervals along a direction perpendicular to the vertical direction and the first direction.

8. The shock wave protection device according to claim 3, characterized in that: The frame body includes a plurality of frames, each of which is installed on the building wall along the first direction, and each of the frames is provided with a plurality of the protection modules spaced apart along the vertical direction.

9. The shock wave protection device according to claim 8, characterized in that: The first protective member comprises a first open end and a first closed end arranged opposite to the first open end, the first open end faces the first direction, and along the first direction, the first open ends of adjacent first protective members face opposite directions, and adjacent first closed ends are arranged opposite to each other; Alternatively, the first opening end faces the vertical direction, and along the first direction, the first opening ends of adjacent first protective members face opposite directions; Alternatively, the first opening end of one of the first protective members adjacent to each other along the first direction faces the moving direction of the shock wave, and the first opening end of the other one faces the vertical direction.

10. The shock wave protection device according to claim 8, characterized in that: The first side is defined as a side of the building wall close to the shock wave, and the second side is defined as a side of the building wall away from the shock wave. In the protection module close to the second side, the first protection member includes a first open end and a first closed end arranged opposite to the first open end, and the first open end faces the first side; and an end of the first grille or the second grille facing away from the first closed end is located at a first position; Among the multiple protection modules distributed along the vertical direction close to the first side, there is a spacing area along the vertical direction between adjacent protection modules and close to the second side, and the projection formed by the spacing area on the projection plane perpendicular to the first direction covers the projection formed by the first position on the projection plane.

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