A fireproof structure for building wall

Abstract

The present invention relates to the field of building technology, and in particular to a fireproof structure of a building wall, comprising a venetian blind arranged on the wall, the venetian blind comprising blades arranged in an array along a vertical direction and a transmission rod connecting the blades, a switch assembly for controlling the opening and closing of the venetian blind and a fireproof assembly connected to the output end of the switch assembly, the switch assembly comprising a thermal switch connected to the transmission rod, the thermal switch comprising a metal sheet, the metal sheet comprising a first metal layer, a second metal layer and a hot melt layer, the thermal expansion coefficient of the first metal layer is greater than the thermal expansion coefficient of the second metal layer, and the hot melt layer has an insulating property; the fireproof assembly comprises a fireproof board and a clamping component electrically connected to both sides of the metal sheet, and the clamping assembly is used to limit the sliding of the fireproof board. The present invention sets a thermal switch, and when the temperature exceeds the limit, the hot melt layer melts, prompting the fireproof assembly to start, so that a two-layer fireproof barrier is formed outside the window.

Description

Technical Field

[0001] The invention relates to the technical field of construction, and in particular to a fireproof structure for a building wall. Background Art

[0002] When an indoor fire occurs, in the initial stage of the fire, the burning area is small, the flame is not high, the burning intensity is weak, the fire scene temperature and radiant heat are low, the fire spreads slowly to the surrounding area, the amount of combustible materials is small, the temperature is low, etc., which may cause the fire to extinguish itself. When objective conditions such as combustible materials are sufficient, the fire reaches the full development stage. After entering the full development stage, the fire develops very quickly, the burning intensity increases, the temperature rises, the nearby combustible materials are heated, and flashover is prone to occur.

[0003] The critical temperature of flashover is generally between 400 and 600 degrees Celsius. At this temperature, combustibles such as plastic products are more easily decomposed into combustible gases, making the fire more intense. General fire-proof structures are divided by flame-retardant walls and closed by exterior walls, which slows down the internal air circulation. There is a period of rapid temperature rise between the initial stage and the fully developed stage. This time period is extremely short and requires timely reminders to external personnel for rescue. However, general fire-proofing settings are closed during this time period, resulting in unclear smoke columns and no obvious reminders of the internal situation, which can easily lead to misjudgment of the fire situation inside. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a building wall fire protection structure to solve the above-mentioned problems.

[0005] Based on the above purpose, the present invention provides a fireproof structure for a building wall, comprising a shutter arranged on the wall, the shutter comprising blades arranged in an array along a vertical direction and a transmission rod connecting the blades, the shutter is provided with a switch assembly and a fireproof assembly for controlling the opening and closing of the shutter, the switch assembly comprises a thermal switch connected to the transmission rod, wherein;

[0006] The thermal switch comprises a metal sheet, the metal sheet comprises a first metal layer, a second metal layer and a hot melt layer, the thermal expansion coefficient of the first metal layer is greater than the thermal expansion coefficient of the second metal layer, the hot melt layer is fixedly connected to a side of the first metal layer away from the second metal layer, and the hot melt layer has an insulating property;

[0007] The fireproof assembly includes a fireproof board and a clamping component electrically connected to both sides of the metal sheet, the fireproof board is vertically arranged at the eaves outside the wall surface and is slidably connected to the wall surface in the vertical direction, and the clamping component is used to limit the sliding of the fireproof board;

[0008] The temperature when the thermal deformation of the first metal layer and the hot melt layer is greater than the thermal deformation of the second metal layer is the first temperature, the melting point of the hot melt layer is the second temperature, the first temperature is lower than the second temperature, when the temperature of the air flow passing through the louver is lower than the first temperature, the louver is in a closed state, when the temperature of the air flow passing through the louver is greater than the first temperature and lower than the second temperature, the louver is in an open state, when the temperature of the air flow passing through the louver is greater than the second temperature, the louver is in a closed state, and the fireproof board slides from its highest position to its lowest position

[0009] Optionally, the linkage assembly includes an electric telescopic rod installed on the window frame, a sliding rod vertically fixedly connected to the output end of the electric telescopic rod, and a sliding rail fixedly connected to the transmission rod, the push rod is slidably connected in the sliding groove of the sliding rail, and the axial direction of the sliding rod is parallel to the rotation axis of the blade.

[0010] Optionally, a protrusion is provided on one side of the transmission rod close to the rotation axis of the blade, a circular protrusion is fixedly connected to the blade, and the protrusion is rotationally connected to the circular protrusion.

[0011] Optionally, the fire protection assembly also includes a baffle plate arranged on the top outer side of the shutter, a receiving groove is provided on the baffle plate, the clamping component includes a micro electromagnet arranged in the receiving groove, an elastic member abutting the micro electromagnet, and a clamping block arranged on the side of the elastic member away from the micro electromagnet, the clamping block is a magnetic member, a corresponding clamping groove cooperating with the clamping block is provided on the bottom of the fire protection board, the clamping block is used to limit the descent of the fire protection board, and the micro electromagnet, the external power supply, the first terminal and the second terminal form a closed circuit.

[0012] Optionally, it also includes a curtain wall arranged on the wall surface, a cavity is formed between the curtain wall and the wall surface, and the fire protection component is arranged in the cavity.

[0013] Optionally, a thermal insulation board is provided between the curtain wall and the wall surface, and the thermal insulation board is provided around the shutter window.

[0014] Optionally, the first temperature is set to 300 degrees Celsius, and the second temperature is set to 350 degrees Celsius.

[0015] Beneficial effects of the present invention:

[0016] The present invention provides shutters to block the air out of the window and reduce the external wind inlet. The switch assembly and the fireproof assembly are provided. The switch assembly includes a thermal switch, so that the thermal switch adjusts the closed and open states of the shutters according to the temperature of the air passing through the window. The thermal switch is provided with two temperature thresholds. When the temperature is lower than the first temperature, the shutters are in a closed state to reduce the ventilation in the room, so as to prevent the rapid spread of the fire due to the large ventilation volume, resulting in the fire being too late for rescue. When the temperature is higher than the first temperature and lower than the second temperature, it indicates that the temperature in the fire scene rises rapidly and gradually develops toward the flashover temperature. At this time, the shutters are in an open state to quickly dissipate the internal smoke into the external cavity, so as to remind the external personnel to rescue in time and pay attention to their own situation. When the temperature exceeds the second temperature, the shutters are in a closed state to reduce the ventilation volume. At the same time, the fireproof assembly is in a working state, and the protective plate falls and blocks the entrance of the window, so that the shutter window achieves double-layer protection. At the same time, the operation of the fireproof plate reminds that the internal fire is in a flashover state and the internal situation is very dangerous. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or 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 in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0019] Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure of the middle A area;

[0020] Figure 3 This is a schematic diagram of the structure after the curtain wall is hidden in an embodiment of the present invention;

[0021] Figure 4 is a cross-sectional view of an embodiment of the present invention;

[0022] Figure 5 For the present invention Figure 4 Schematic diagram of the enlarged structure of the middle B area;

[0023] Figure 6 4 is a cross-sectional view of a thermal switch according to an embodiment of the present invention.

[0024] The markings in the figure are:

[0025] 1. Wall; 2. Venetian blinds; 3. Blades; 4. Transmission rod; 5. Thermal switch; 6. Metal sheet; 7. First metal layer; 8. Second metal layer; 9. Hot melt layer; 10. Fireproof board; 11. Shell; 12. Moving contact piece; 13. Static contact piece; 14. Conductive spring piece; 15. First terminal; 16. Second terminal; 17. Electric telescopic rod; 18. Sliding rod; 19. Sliding rail; 20. Protrusion; 21. Circular protrusion; 22. Baffle; 23. Receiving groove; 24. Micro electromagnet; 25. Elastic piece; 26. Block; 27. Slot; 28. Curtain wall; 29. ​​Insulation board. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments. Example

[0027] One or more embodiments of this specification provide a building wall fire protection structure, such as Figures 1 to 6As shown, it includes a venetian blind 2 arranged on a wall 1, the venetian blind 2 includes blades 3 distributed in an array along the vertical direction and a transmission rod 4 connecting the blades 3, and is characterized in that a switch component and a fireproof component for controlling the opening and closing of the venetian blind 2 are arranged, the switch component includes a thermal switch 5 transmission-connected to the transmission rod 4, the thermal switch 5 includes a metal sheet 6, the metal sheet 6 includes a first metal layer 7, a second metal layer 8 and a hot melt layer 9, the thermal expansion coefficient of the first metal layer 7 is greater than the thermal expansion coefficient of the second metal layer 8, the hot melt layer 9 is fixedly connected to the side of the first metal layer 7 away from the second metal layer 8, and the hot melt layer 9 has insulating properties; the fireproof component includes a fireproof board 10 and a clamping component electrically connected to both sides of the metal sheet 6, the fireproof board 10 is vertically arranged at the eaves outside the wall 1 and is slidably connected to the wall 1 along the vertical direction, and the clamping component is used to limit the sliding of the fireproof board 10;The temperature when the thermal deformation of the first metal layer 7 and the hot melt layer 9 is greater than the thermal deformation of the second metal layer 8 is the first temperature, the melting point of the hot melt layer 9 is the second temperature, the first temperature is lower than the second temperature, when the temperature of the air flow passing through the shutter 2 is lower than the first temperature, the shutter 2 is in a closed state, when the temperature of the air flow passing through the shutter 2 is greater than the first temperature and lower than the second temperature, the shutter 2 is in an open state, when the temperature of the air flow passing through the shutter 2 is greater than the second temperature, the shutter 2 is in a closed state, the fireproof board 10 slides from its highest position to its lowest position, the first temperature is set to 300 degrees Celsius, the second temperature is set to 350 degrees Celsius, and the working When the indoor smoke passes through the top gap of the shutter 2, the heat acts on the thermal switch 5. When the temperature of the indoor smoke is lower than the first temperature, since the initial state of the thermal switch 5 is the disconnected state, at this time, the switch assembly is in the disconnected state, so that the shutter 2 is in the closed state. When the indoor temperature along the gap is greater than the first temperature and less than the second temperature, the first metal layer 7 and the hot melt layer 9 are both thermally deformed. Since the thermal expansion coefficients of the first metal layer 7 and the hot melt layer 9 are greater than the thermal expansion coefficient of the second metal layer 8, the first metal layer 7 and the hot melt layer 9 press the second metal layer 8, so that the second metal layer 8 pushes the thermal switch 5. The push rod pushes the moving contact piece 12 to contact the static contact piece 13, so that the thermal switch 5 is in a closed state, so that the linkage component is connected and controls the shutter 2 to be in an open state, so that the smoke accumulated in the early stage of the fire escapes from the window to form a smoke column, thereby enhancing its warning function and reminding external personnel that the internal fire is changing rapidly and urgently needs support. When the dimension passing through the window is greater than the second temperature, the hot melt layer 9 inside the thermal switch 5 gradually melts under the action of high temperature. Since the clamping component is electrically connected to the upper and lower sides of the metal sheet 6, when the hot melt layer 9 melts, the clamping component is in a connected state, so that the clamping component is opened, and the fireproof board 10 loses its restriction. Fall down, slide to the entrance of the window, complete the window blocking, further restrict the ventilation conditions, and prevent the internal flame from escaping the window. At the same time, the falling of the fireproof board indicates that the internal temperature has reached the flashover temperature. The internal fire is very dangerous and extreme caution is required during rescue. The flashover temperature is generally 400 degrees Celsius to 600 degrees Celsius. The second temperature is set to 350 degrees Celsius to reduce the impact of temperature loss during smoke propagation and ensure that it has a reminder effect before the flashover. The first temperature is 300 degrees Celsius to ensure that the temperature difference between the first temperature and the second temperature is small, reducing the time the shutter 2 is opened to prevent the opening time from being too long, which will increase the internal fire. ;

[0028] In some optional specific embodiments, such as Figure 6As shown, the thermal switch 5 also includes a housing 11, a moving contact piece 12, a stationary contact piece 13, a conductive spring piece 14 installed on the housing 11, a push rod abutting against one side of the metal sheet 6, a first terminal 15 electrically connected to the conductive spring piece 14, and a second terminal 16 electrically connected to the first metal layer 7. The hot melt layer 9 is arranged on the top of the first metal layer 7, one side of the conductive spring piece 14 abuts against the hot melt layer 9, the first terminal 15 is electrically connected to the power supply, and the second terminal 16 is electrically connected to the fireproof component. When the thermal switch 5 is initially opened, there is a gap between the moving contact piece 12 and the stationary contact piece 13, and the stationary contact piece 13 is in a closed position. 13 is arranged on the side of the moving contact piece 12 away from the push rod. When working, the first terminal 15 and the second terminal 16 are conveniently used for electrical connection with the clamping component. When the thermal switch 5 is initially on, there is a gap between the moving contact piece 12 and the static contact piece 13, so that the thermal switch 5 is initially in an off state. When the hot melt layer 9 melts, one side of the conductive spring sheet 14 contacts the hot melt layer 9, causing the conductive spring sheet 14 to directly contact the first metal element, so that the first terminal 15 is electrically connected to the second terminal 16, so that the clamping component forms a closed circuit, so that the clamping component is in a working state.

[0029] In some optional specific embodiments, such as Figure 1 and Figure 2 As shown, a linkage assembly is arranged between the transmission rod 4 and the thermal switch 5, and the linkage assembly comprises an electric telescopic rod 17 mounted on the window frame, a sliding rod 18 vertically fixedly connected to the output end of the electric telescopic rod 17, and a sliding rail 19 fixedly connected to the transmission rod 4, the sliding rod 18 is slidably connected in the sliding groove of the sliding rail 19, the axial direction of the sliding rod 18 is parallel to the rotation axis of the blade 3, a protrusion 20 is provided on the side of the transmission rod 4 close to the rotation axis of the blade 3, a circular protrusion 21 is fixedly connected to the blade 3, and the protrusion 20 is rotationally connected to the circular protrusion 21. When working, the electric telescopic rod 17 is in a working state, and its output end extends out and acts on the sliding rod 18, so that the sliding rod pushes the sliding rail 19, driving the transmission rod 4 fixedly connected to the sliding rail 19 to rotate, so that the transmission rod 4 pushes the circular protrusion 21 rotatably connected thereto, so that the blade 3 rotates along its rotation axis, thereby completing the closing and opening of the blade 3, and by providing the protrusion 20, it is convenient for the axial direction of the circular protrusion 21 to be located directly below the rotation axis of the blade 3, thereby reducing the displacement of the transmission rod 4.

[0030] In some optional specific embodiments, such as Figure 3 , Figure 4 and Figure 5As shown, it also includes a curtain wall 28 arranged on the wall surface 1, a cavity is formed between the curtain wall 28 and the wall surface 1, and the fireproof component is arranged in the cavity. The fireproof component also includes a baffle 22 arranged on the top of the outer side of the shutter 2, and a receiving groove 23 is opened on the baffle 22. The clamping component includes a micro electromagnet 24 arranged in the receiving groove 23, an elastic member 25 abutting against the micro electromagnet 24, and a clamping block 26 arranged on the side of the elastic member 25 away from the micro electromagnet 24. The clamping block 26 is a magnetic member. A clamping groove 27 cooperating with the clamping block 26 is correspondingly opened at the bottom of the fireproof board 10. The clamping block 26 is used to limit the descent of the fireproof board 10. The micro electromagnet 24, the external power supply, the first terminal 15 and the second terminal 16 form A closed circuit is provided, and a thermal insulation board 29 is arranged between the curtain wall 28 and the wall surface 1. The thermal insulation board 29 is arranged around the window of the shutter 2. When working, the cavity formed by the curtain wall 28 is more conducive to the preservation of the fireproof components and avoids interference caused by external alignment. The baffle 22 and the thermal insulation board 29 can prevent smoke from directly entering the cavity of the curtain wall 28, and prevent the curtain wall 28 from being heated and causing its fixed structure to deform, affecting the installation strength. When the card-connecting components are connected, the micro electromagnet 24 is in a working state, forming an adsorption magnetic force, so that the card block 26 and the elastic member 25 are close to the micro electromagnet 24, so that the card block 26 is separated from the card slot 27. At this time, the fireproof board 10 loses its restriction and moves to the window under the action of gravity to form protection and reminder.

[0031] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0032] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fireproof structure for a building wall, comprising a shutter (2) arranged on a wall (1), wherein the shutter (2) comprises blades (3) arranged in an array in a vertical direction and a transmission rod (4) connecting the blades (3), characterized in that: The shutter (2) is provided with a switch assembly and a fire protection assembly for controlling the opening and closing of the shutter, wherein the switch assembly comprises a thermal switch (5) connected to the transmission rod (4) in a transmission manner, wherein; The thermal switch (5) comprises a metal sheet (6), the metal sheet (6) comprising a first metal layer (7), a second metal layer (8) and a hot melt layer (9), the thermal expansion coefficient of the first metal layer (7) being greater than the thermal expansion coefficient of the second metal layer (8), the hot melt layer (9) being fixedly connected to a side of the first metal layer (7) away from the second metal layer (8), and the hot melt layer (9) having an insulating property; The fireproof assembly comprises a fireproof board (10) and a clamping component electrically connected to two sides of the metal sheet (6), the fireproof board (10) is vertically arranged at the eaves outside the wall surface (1) and is slidably connected to the wall surface (1) in the vertical direction, and the clamping component is used to limit the sliding of the fireproof board (10); The temperature at which the thermal deformation of the first metal layer (7) and the hot-melt layer (9) is greater than the thermal deformation of the second metal layer (8) is the first temperature, the melting point of the hot-melt layer (9) is the second temperature, the first temperature is lower than the second temperature, when the temperature of the airflow passing through the louver (2) is lower than the first temperature, the louver (2) is in a closed state, when the temperature of the airflow passing through the louver (2) is greater than the first temperature and lower than the second temperature, the louver (2) is in an open state, when the temperature of the airflow passing through the louver (2) is greater than the second temperature, the louver (2) is in a closed state, and the fireproof board (10) slides from its highest position to its lowest position; The thermal switch (5) further comprises a housing (11), a moving contact piece (12), a stationary contact piece (13), a conductive spring piece (14) mounted on the housing (11), a first terminal (15) electrically connected to the conductive spring piece (14), and a second terminal (16) electrically connected to the first metal layer (7); the hot melt layer (9) is arranged on the top of the first metal layer (7); one side of the conductive spring piece (14) abuts against the hot melt layer (9); the first terminal (15) is electrically connected to an external power source; the second terminal (16) is electrically connected to a fire protection component; and when the thermal switch (5) is initially in operation, a gap exists between the moving contact piece (12) and the stationary contact piece (13).

2. The building wall fire protection structure according to claim 1, characterized in that: A linkage assembly is provided between the transmission rod (4) and the thermal switch (5), the linkage assembly comprising an electric telescopic rod (17) mounted on the window frame, a slide rod (18) vertically fixedly connected to the output end of the electric telescopic rod (17), and a slide rail (19) fixedly connected to the transmission rod (4), the slide rod (18) being slidably connected in a slide groove of the slide rail (19), and the axial direction of the slide rod (18) being parallel to the rotational axis of the blade (3).

3. The building wall fire protection structure according to claim 2, characterized in that: A protrusion (20) is provided on one side of the transmission rod (4) close to the rotation axis of the blade (3), a circular protrusion (21) is fixedly connected to the blade (3), and the protrusion (20) is rotationally connected to the circular protrusion (21).

4. The building wall fire protection structure according to claim 1, characterized in that: The fireproof assembly also includes a baffle (22) arranged on the top of the outer side of the shutter (2), and a receiving groove (23) is provided on the baffle (22). The clamping component includes a micro electromagnet (24) arranged in the receiving groove (23), an elastic member (25) abutting against the micro electromagnet (24), and a clamping block (26) arranged on the side of the elastic member (25) away from the micro electromagnet (24). The clamping block (26) is a magnetic member. A corresponding clamping groove (27) cooperating with the clamping block (26) is provided at the bottom of the fireproof board (10). The clamping block (26) is used to limit the descent of the fireproof board (10). The micro electromagnet (24), the external power supply, the first terminal (15) and the second terminal (16) form a closed circuit.

5. The building wall fire protection structure according to claim 4, characterized in that: It also comprises a curtain wall (28) arranged on the wall surface (1), a cavity is formed between the curtain wall (28) and the wall surface (1), and the fireproof component is arranged in the cavity.

6. The building wall fire protection structure according to claim 5, characterized in that: A thermal insulation board (29) is provided between the curtain wall (28) and the wall surface (1), and the thermal insulation board (29) is provided around the window of the shutter (2).

7. The building wall fire protection structure according to claim 1, characterized in that: The first temperature is set to 300 degrees Celsius, and the second temperature is set to 350 degrees Celsius.

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