Steel structure wall for green building

Abstract

The invention relates to the field of steel structure walls, in particular to a steel structure wall for a green building. According to the steel structure wall body for the green building, rainwater can be collected, the collected rainwater can be stored in the wall plate, heat insulation and sound insulation can be conducted on the wall plate, and meanwhile the steel structure wall body can be used for fire fighting. A steel structure wall for a green building comprises a wall plate, a sound absorption plate, an auxiliary installation mechanism and the like, the sound absorption plate is connected to the rear side of the wall plate, and the auxiliary installation mechanism capable of being rapidly installed is arranged on the wall plate. Rainwater flows into the water injection pipe along the flow guide part and then flows into the storage tank from the water injection pipe, the storage tank is protected by the protection plate, when a fire disaster occurs indoors, the storage tank flows out from the water outlet pipe and then sprays water into the room through the fire-fighting spray head, and the purposes that the rainwater can be collected, the collected rainwater can be stored in the wall plate, and the environment is protected are achieved. And meanwhile, the wallboard can be used for fire fighting.

Description

Technical Field

[0001] The invention relates to the field of steel structure walls, and in particular to a steel structure wall for green buildings. Background Art

[0002] Steel structure is a structure made of steel materials. Steel structure is mainly composed of beam steel, steel column, steel truss and other components made of steel and steel plate. The components or parts are usually connected by welds, bolts or rivets. Steel structure wall is a protective structure composed of steel structure and concrete. It is widely used in large factories, venues, super high-rise buildings and other fields, and has the advantage of simple construction. The existing steel structure wall is isolated from external noise and high temperature by the sound-absorbing and heat-insulating layer on the wall panel. However, due to the limited effect of the sound-absorbing and heat-insulating layer, when a fire occurs in the factory, it cannot cope with the fire, and the cost of use is high.

[0003] Therefore, a green building steel structure wall has been developed which can collect rainwater and store the collected rainwater in wall panels, insulate the wall panels for heat and sound insulation, and can also be used for fire protection. Summary of the invention

[0004] In order to overcome the shortcomings of existing steel structure walls, which are unable to cope with fire situations when a fire occurs in a factory building and have high usage costs, the present invention provides a steel structure wall for green buildings that can collect rainwater and store the collected rainwater in wall panels, insulate the wall panels for heat and sound insulation, and can be used for fire fighting.

[0005] The technical solution is: a steel structure wall for green buildings, including wall panels, sound-absorbing panels, auxiliary installation mechanisms and enhanced protection mechanisms. The sound-absorbing panels are connected to the back side of the wall panels, and the wall panels are provided with auxiliary installation mechanisms that can be quickly installed. The wall panels are also provided with enhanced protection mechanisms that can improve protection performance.

[0006] Further explanation, the auxiliary installation mechanism includes a guide frame, a sliding member, a rotating member, an elastic sheet, a spring and a push plate. The left and right rear sides of the wall panel are connected to the guide frame, the upper and lower parts of the guide frame are slidably connected to the sliding member, the sliding member is rotatably connected to the rotating member, the front and rear parts of the rotating member are connected to the elastic sheet, the upper and lower parts of the guide frame are slidably connected to the push plate, and the sliding member is connected to the adjacent push plate with a spring. The wall panel is placed on the installation frame, and then the sliding member is released, the spring rebounds, so that the sliding members approach each other, driving the rotating members to approach each other and engage with the installation frame. The elastic sheet contacts the installation frame and deforms, further enhancing the stability between the rotating member and the installation frame.

[0007] It is further explained that the enhanced protection mechanism includes a storage box, a protective plate, a water injection pipe, a guide piece, a water outlet pipe and a fire sprinkler. The storage box is connected to the front side of the wall panel, and the protective plate is connected to the front side of the storage box. The upper sides of the left and right parts of the storage box are connected to water injection pipes, and the water injection pipes pass through the protective plate. The front sides of the left and right parts of the protective plate are connected to guide pieces, and the guide pieces are connected to adjacent water injection pipes. The lower sides of the left and right parts of the storage box are connected to water outlet pipes, and the water outlet pipes pass through the wall panel. The water outlet pipes are connected to fire sprinklers. After the wall panels are assembled, the guide pieces are located on the outside of the wall panels. When it rains, rainwater flows into the water injection pipe along the guide pieces, and then flows into the storage box from the water injection pipe. The protective plate protects the storage box. When a fire occurs indoors, water flows out of the storage box from the water outlet pipe and is sprayed into the room through the fire sprinkler.

[0008] Further explanation: a plurality of protection strips are provided on the protection plate.

[0009] To further explain, the flow guides are all inclined structures.

[0010] Further description, it also includes a reinforcement mechanism, which includes a fixed seat, a bidirectional screw and a knob. The middle part of the guide frame is connected to a fixed seat, and the fixed seat is rotatably connected to a bidirectional screw. The push plates are threadedly connected to adjacent bidirectional screws, and the middle part of the bidirectional screw is connected to a knob. After the wall panel is installed on the mounting frame, the knob is turned to drive the bidirectional screw to rotate, so that the push plates are close to each other and the compression springs are made.

[0011] Further description, it also includes a cleaning mechanism, which includes a floating plate, a wire rope, a guide member, a movable frame, a scraper and a tension spring. A floating plate is placed inside the storage box, and the upper sides of the left and right parts of the floating plate are connected to the wire rope, the upper sides of the guide members are connected to the guide members, and the guide members are slidably connected to the movable frames. The upper parts of the wire ropes are connected to the adjacent movable frames, and the movable frames are slidably connected to the scrapers. The movable frames are connected to the connected guide members with tension springs. Initially, the tension springs are in a stretched state. When the water level in the storage box rises, the floating plate floats up, the wire rope relaxes, and then the tension spring rebounds, driving the movable frame to slide on the guide member. The scraper slides on the movable frame and always keeps in contact with the guide member, so that the scraper moves on the guide member.

[0012] Further description, it also includes a winding wheel, the outside of the guide member is rotatably connected to the winding wheel, the wire rope is in contact with the adjacent winding wheel, and the winding wheel guides the wire rope.

[0013] Further description, it also includes a docking mechanism, which includes a fixed frame and a docking strip. The fixed frame is connected to the outside of the protective plate, and the docking strips are clamped on the upper side and the left side of the fixed frame. After the wall panels are assembled into a wall, the protective plates are docked with each other, and then the docking strips on the fixed frame are pushed so that the docking strips are clamped between two adjacent fixed frames.

[0014] Further explanation, it also includes a cooling mechanism, which includes a nitrogen cylinder, a nozzle and a solenoid valve. Nitrogen cylinders are connected to the rear sides of the left and right parts of the protective plate. The nitrogen cylinders are connected to nozzles. The nozzles are connected to the wall panels. The nozzles are equipped with solenoid valves. When the temperature of the wall panels is high, the solenoid valve is controlled to open, so that the liquid nitrogen in the nitrogen cylinder is sprayed out from the nozzle.

[0015] The beneficial effects of the present invention are as follows: 1. According to the present invention, rainwater flows into the water injection pipe along the guide member, and then flows into the storage box from the water injection pipe. The protective plate protects the storage box. When a fire occurs indoors, water flows out of the storage box from the outlet pipe and is sprayed into the room through the fire sprinkler. The rainwater can be collected and stored in the wall panels, and the wall panels can be insulated and soundproofed, and can be used for fire fighting.

[0016] 2. The present invention releases the sliding parts and allows the springs to rebound, so that the sliding parts approach each other, drive the rotating parts to approach each other and engage with the installation frame, and the elastic sheet deforms when in contact with the installation frame, thereby further enhancing the stability between the rotating parts and the installation frame, thereby achieving the effect of being able to quickly and conveniently install the wall panels and cope with the thermal expansion and contraction of the installation frame.

[0017] 3. After the wall panel of the present invention is installed on the installation frame, the knob is turned to drive the bidirectional screw to rotate, so that the push plates are close to each other to compress the spring, thereby achieving the effect of limiting the sliding range of the sliding part and improving the stability of the wall panel.

[0018] 4. When the water level in the reserve tank of the present invention rises, the floating plate floats up accordingly, the wire rope relaxes, and then the tension spring rebounds, driving the movable frame to slide on the guide member. The scraper member slides on the movable frame and always keeps in contact with the guide member, so that the scraper member moves on the guide member, thereby achieving the effect of being able to clean the guide member and avoiding blockage of the guide member.

[0019] 5. After the wall panels are assembled into a wall, the protective panels are butted against each other, and then the butt joint strips on the fixed frames are pushed so that the butt joint strips are clamped between two adjacent fixed frames, thereby achieving the effect of being able to splice the protective panels and improving the stability of the protective panels.

[0020] 6. When the temperature of the wall panel is high, the present invention controls the electromagnetic valve to open, so that the liquid nitrogen in the nitrogen cylinder is sprayed out from the nozzle, thereby achieving the effect of cooling the inner side of the wall panel and avoiding fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the first three-dimensional structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the second three-dimensional structure of the present invention.

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the auxiliary installation mechanism of the present invention.

[0024] Figure 4 It is a schematic diagram of the first three-dimensional structure of the strengthening protection mechanism of the present invention.

[0025] Figure 5 It is a schematic diagram of the second three-dimensional structure of the strengthening protection mechanism of the present invention.

[0026] Figure 6 It is a schematic diagram of the third three-dimensional structure of the enhanced protection mechanism of the present invention.

[0027] Figure 7 It is a schematic diagram of the three-dimensional structure of the reinforcement mechanism of the present invention.

[0028] Figure 8 It is a schematic diagram of the first three-dimensional structure of the cleaning mechanism of the present invention.

[0029] Fig. 9 It is a schematic diagram of a second partial three-dimensional structure of the cleaning mechanism of the present invention.

[0030] Fig.10 It is a partial three-dimensional structural diagram of the cleaning mechanism of the present invention.

[0031] Fig.11 It is a partial enlarged view of the three-dimensional structure of the cleaning mechanism of the present invention.

[0032] Fig.12 It is a schematic diagram of the first three-dimensional structure of the docking mechanism of the present invention.

[0033] Fig.13 It is a schematic diagram of the second three-dimensional structure of the docking mechanism of the present invention.

[0034] Fig.14 It is a schematic diagram of the first three-dimensional structure of the cooling mechanism of the present invention.

[0035] Fig.15 It is a schematic diagram of the second three-dimensional structure of the cooling mechanism of the present invention.

[0036] In the above drawings: 1: wall panel, 2: sound absorbing panel, 3: auxiliary installation mechanism, 30: guide frame, 31: sliding member, 32: rotating member, 33: elastic sheet, 34: spring, 35: pushing plate, 4: strengthening protection mechanism, 40: storage box, 41: protective plate, 42: water injection pipe, 43: guide member, 44: water outlet pipe, 45: fire sprinkler, 5: reinforcement mechanism, 50: fixed seat, 51: two-way screw rod, 52: knob, 6: cleaning mechanism, 60: floating plate, 61: wire rope, 62: guide member, 63: movable frame, 64: scraper, 65: winding wheel, 66: tension spring, 7: docking mechanism, 70: fixed frame, 71: docking strip, 8: cooling mechanism, 80: nitrogen cylinder, 81: nozzle, 82: solenoid valve. DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0038] A steel structure wall for green building, such as Figure 1 and Figure 2 As shown, it includes a wall panel 1, a sound absorbing panel 2, an auxiliary installation mechanism 3 and a strengthening protection mechanism 4. The sound absorbing panel 2 is connected to the rear side of the wall panel 1, the auxiliary installation mechanism 3 is provided on the wall panel 1, and the strengthening protection mechanism 4 is also provided on the wall panel 1.

[0039] like Figure 1-Figure 3 As shown, the auxiliary installation mechanism 3 includes a guide frame 30, a sliding member 31, a rotating member 32, an elastic sheet 33, a spring 34 and a pushing plate 35. The left and right rear sides of the wall panel 1 are connected to the guide frame 30, the upper and lower parts of the guide frame 30 are slidably connected to the sliding member 31, the sliding member 31 is rotatably connected to the rotating member 32, the front and rear parts of the rotating member 32 are connected to the elastic sheet 33, the upper and lower parts of the guide frame 30 are slidably connected to the pushing plate 35, and the sliding member 31 is connected to the adjacent pushing plate 35 with a spring 34.

[0040] like Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6As shown, the enhanced protection mechanism 4 includes a storage box 40, a protective plate 41, a water injection pipe 42, a guide member 43, a water outlet pipe 44 and a fire sprinkler 45. The front side of the wall panel 1 is connected to the storage box 40, and the front side of the storage box 40 is connected to the protective plate 41. Fourteen protection strips are provided on the protective plate 41 to improve the protection performance. The upper sides of the left and right parts of the storage box 40 are connected to water injection pipes 42, and the water injection pipes 42 pass through the protective plate 41. The front sides of the left and right parts of the protective plate 41 are connected to guide members 43. The guide members 43 are all inclined structures to facilitate the diversion of rainwater. The guide members 43 are connected to adjacent water injection pipes 42. The lower sides of the left and right parts of the storage box 40 are connected to water outlet pipes 44, and the water outlet pipes 44 pass through the wall panel 1. Fire sprinklers 45 are connected to the water outlet pipes 44.

[0041] When using the present invention, first pull the sliding member 31 on the guide frame 30 to move away from each other, the spring 34 is squeezed and contracted, then the wall panel 1 is placed on the installation frame, and then the sliding member 31 is released, the spring 34 rebounds, so that the sliding members 31 are close to each other, driving the rotating members 32 to approach each other and engage with the installation frame, the elastic sheet 33 contacts the installation frame and deforms, further enhancing the stability between the rotating member 32 and the installation frame, thereby achieving a quick and convenient installation of the wall panel 1 and being able to cope with the thermal expansion and contraction of the installation frame, and then repeating the above operation to splice the wall panel 1 on the installation frame to form a complete wall, and the sound-absorbing panel 2 absorbs the noise. By using the enhanced protection mechanism 4 of the present device, the wall panel 1 can be enhanced and protected. After the wall panel 1 is assembled, the guide member 43 is located on the outside of the wall panel 1. When it rains, rainwater flows into the water injection pipe 42 along the guide member 43, and then flows into the reserve box 40 from the water injection pipe 42. The protective plate 41 protects the reserve box 40. When a fire occurs indoors, the reserve box 40 flows out from the outlet pipe 44 and is sprayed into the room through the fire sprinkler 45, thereby collecting rainwater and storing the collected rainwater in the wall panel 1, thereby heat-insulating and sound-isolating the wall panel 1 and being used for firefighting.

[0042] like Figure 1 and Figure 7 As shown, a reinforcement mechanism 5 is also included, which includes a fixed seat 50, a bidirectional screw rod 51 and a knob 52. The middle part of the guide frame 30 is connected to the fixed seat 50, and the fixed seat 50 is rotatably connected to the bidirectional screw rod 51. The push plate 35 is threadedly connected to the adjacent bidirectional screw rod 51, and the middle part of the bidirectional screw rod 51 is connected to the knob 52.

[0043] By using the reinforcement mechanism 5 of the device, the stability of the wall panel 1 can be enhanced. After the wall panel 1 is installed on the mounting frame, the knob 52 is turned to drive the bidirectional screw rod 51 to rotate, so that the push plates 35 are close to each other and the compression springs 34 are compressed, thereby limiting the sliding range of the sliding member 31 and improving the stability of the wall panel 1.

[0044] like Figure 1 , Figure 2 , Figure 8 , Fig. 9 , Fig.10 and Fig.11 As shown, a cleaning mechanism 6 is also included, and the cleaning mechanism 6 includes a floating plate 60, a wire rope 61, a guide member 62, a movable frame 63, a scraper 64, a winding wheel 65 and a tension spring 66. The floating plate 60 is placed inside the storage box 40, and the upper sides of the left and right parts of the floating plate 60 are connected to the wire rope 61, the upper sides of the guide members 43 are connected to the guide members 62, and the guide members 62 are slidably connected to the movable frames 63. The upper parts of the wire ropes 61 are connected to the adjacent movable frames 63, and the movable frames 63 are slidably connected to the scrapers 64. The outsides of the guide members 43 are rotatably connected to the winding wheels 65, and the wire ropes 61 are in contact with the adjacent winding wheels 65. The movable frames 63 are connected to the connected guide members 62 with tension springs 66, and the tension springs 66 are initially in a stretched state.

[0045] The cleaning mechanism 6 of the device can be used to clean the guide member 43. When the water level in the reserve tank 40 rises, the floating plate 60 floats up, the wire rope 61 relaxes, and then the tension spring 66 rebounds, driving the movable frame 63 to slide on the guide member 62. The scraper 64 slides on the movable frame 63 and always keeps in contact with the guide member 43, so that the scraper 64 moves on the guide member 43, thereby cleaning the guide member 43 and avoiding blockage of the guide member 43. The winding wheel 65 guides the wire rope 61.

[0046] like Figure 1 , Figure 2 , Fig.12 and Fig.13 As shown, a docking mechanism 7 is also included, which includes a fixing frame 70 and a docking strip 71. The fixing frame 70 is connected to the outer side of the protective plate 41, and the docking strip 71 is clamped on the upper side and the left side of the fixing frame 70.

[0047] By using the docking mechanism 7 of the present device, the protective panels 41 can be spliced. After the wall panels 1 are assembled into a wall, the protective panels 41 are docked with each other, and then the docking strips 71 on the fixed frames 70 are pushed so that the docking strips 71 are clamped between two adjacent fixed frames 70, thereby achieving the effect of splicing the protective panels 41 and improving the stability of the protective panels 41.

[0048] like Figure 2 , Fig.14 and Fig.15As shown, a cooling mechanism 8 is also included, and the cooling mechanism 8 includes a nitrogen cylinder 80, a nozzle 81 and a solenoid valve 82. The left and right rear sides of the protective plate 41 are connected to the nitrogen cylinder 80, and the nitrogen cylinder 80 is connected to the nozzle 81. The nozzle 81 is connected to the wall panel 1, and the nozzle 81 is provided with a solenoid valve 82.

[0049] The cooling mechanism 8 of the device can be used to cool the inner side of the wall panel 1. When the temperature of the wall panel 1 is high, the solenoid valve 82 is controlled to open, so that the liquid nitrogen in the nitrogen cylinder 80 is sprayed out from the nozzle 81, thereby cooling the inner side of the wall panel 1 and avoiding fire.

[0050] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A steel structure wall for green building, characterized in that: The invention comprises a wall panel (1), a sound absorbing panel (2), an auxiliary installation mechanism (3) and a strengthening protection mechanism (4); the wall panel (1) is connected to the sound absorbing panel (2) at the rear side; the wall panel (1) is provided with an auxiliary installation mechanism (3) capable of rapid installation; and the wall panel (1) is also provided with a strengthening protection mechanism (4) capable of improving protection performance.

2. A green building steel structure wall according to claim 1, characterized in that: The auxiliary installation mechanism (3) comprises a guide frame (30), a sliding member (31), a rotating member (32), an elastic sheet (33), a spring (34) and a pushing plate (35). The left and right rear sides of the wall panel (1) are both connected to the guide frame (30). The upper and lower parts of the guide frame (30) are both slidably connected to the sliding member (31). The sliding member (31) is rotatably connected to the rotating member (32). The front and rear parts of the rotating member (32) are both connected to the elastic sheet (33). The two lower parts are both slidably connected with a push plate (35), and a spring (34) is connected between the sliding member (31) and the adjacent pushing plate (35). When the wall panel (1) is placed on the installation frame and the sliding member (31) is released, the spring (34) rebounds, so that the sliding members (31) are moved closer to each other, driving the rotating members (32) to move closer to each other and engage with the installation frame. The elastic sheet (33) is deformed when in contact with the installation frame, and the stability between the rotating member (32) and the installation frame is further enhanced.

3. A green building steel structure wall according to claim 2, characterized in that: The strengthening protection mechanism (4) comprises a storage box (40), a protective plate (41), a water injection pipe (42), a flow guide (43), a water outlet pipe (44) and a fire sprinkler (45). The front side of the wall panel (1) is connected to the storage box (40), the front side of the storage box (40) is connected to the protective plate (41), the upper sides of the left and right parts of the storage box (40) are connected to the water injection pipe (42), the water injection pipe (42) passes through the protective plate (41), the front sides of the left and right parts of the protective plate (41) are connected to the flow guide (43), the flow guide (43) is connected to the adjacent water injection pipe (42), and the storage box (40) is connected to the protective plate (41). 0) are connected to the lower sides of the left and right parts, the water outlet pipes (44) are connected to the wall panels (1), and the water outlet pipes (44) are connected to the fire sprinklers (45). After the wall panels (1) are assembled, the guide member (43) is located outside the wall panels (1). When it rains, rainwater flows into the water injection pipe (42) along the guide member (43), and then flows into the reserve box (40) from the water injection pipe (42). The protective plate (41) protects the reserve box (40). When a fire occurs indoors, the reserve box (40) flows out from the water outlet pipe (44) and is then sprayed into the room through the fire sprinklers (45).

4. A green building steel structure wall according to claim 3, characterized in that: A plurality of protection strips are arranged on the protection plate (41).

5. The green building steel structure wall according to claim 3, characterized in that: The flow guides (43) are all inclined structures.

6. The green building steel structure wall according to claim 3, characterized in that: The invention also comprises a reinforcing mechanism (5), the reinforcing mechanism (5) comprising a fixing seat (50), a bidirectional screw rod (51) and a knob (52). The middle of the guide frame (30) is connected to the fixing seat (50), the fixing seat (50) is rotatably connected to the bidirectional screw rod (51), the pushing plates (35) are threadedly connected to the adjacent bidirectional screw rods (51), the middle of the bidirectional screw rods (51) are connected to the knob (52), after the wall panel (1) is installed on the installation frame, the knob (52) is rotated to drive the bidirectional screw rod (51) to rotate, so that the pushing plates (35) are close to each other and the compression spring (34).

7. A green building steel structure wall according to claim 6, characterized in that: The cleaning mechanism (6) also includes a floating plate (60), a steel wire rope (61), a guide member (62), a movable frame (63), a scraper member (64) and a tension spring (66). The floating plate (60) is placed inside the storage box (40). The upper sides of the left and right parts of the floating plate (60) are connected to the steel wire rope (61). The steel wire rope (61) passes through the storage box (40). The upper sides of the guide members (43) are connected to the guide members (62). The movable frame (63) is slidably connected to the guide members (62). The upper parts of the steel wire ropes (61) are connected to the adjacent movable frames (63). The movable frame (63) is connected with a scraper (64) in a sliding manner. The movable frame (63) is connected with a tension spring (66) between the movable frame (63) and the connected guide member (62). Initially, the tension spring (66) is in a stretched state. When the water level in the storage tank (40) rises, the floating plate (60) floats up, the wire rope (61) relaxes, and then the tension spring (66) rebounds, driving the movable frame (63) to slide on the guide member (62). The scraper (64) slides on the movable frame (63) and always keeps in contact with the guide member (43), so that the scraper (64) moves on the guide member (43).

8. The green building steel structure wall according to claim 7, characterized in that: The invention also comprises a winding wheel (65), the outside of the flow guide (43) is rotatably connected with the winding wheel (65), the steel wire rope (61) is in contact with the adjacent winding wheel (65), and the winding wheel (65) guides the steel wire rope (61).

9. The green building steel structure wall according to claim 8, characterized in that: The invention also comprises a docking mechanism (7), the docking mechanism (7) comprising a fixing frame (70) and a docking strip (71), the fixing frame (70) being connected to the outside of the protective plate (41), the fixing frame (70) being clamped on the upper side and the left side of the fixing frame (70), after the wall panels (1) are assembled into a wall, the protective plates (41) are docked with each other, and then the docking strip (71) on the fixing frame (70) is pushed so that the docking strip (71) is clamped between two adjacent fixing frames (70).

10. The green building steel structure wall according to claim 9, characterized in that: The cooling device (8) further comprises a cooling mechanism (8), which comprises a nitrogen cylinder (80), a nozzle (81) and a solenoid valve (82). The rear sides of the left and right parts of the protective plate (41) are both connected to the nitrogen cylinder (80), and the nitrogen cylinder (80) is connected to the nozzle (81). The nozzle (81) is connected to the wallboard (1), and the nozzle (81) is provided with a solenoid valve (82). When the temperature of the wallboard (1) is high, the solenoid valve (82) is controlled to open, so that the liquid nitrogen in the nitrogen cylinder (80) is sprayed out from the nozzle (81).

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