Ventilated fire door

Abstract

The utility model discloses a kind of ventilation type normally closed fireproof door, belong to fire door technical field, the fireproof door includes fireproof door frame, fireproof door board, penetration slot, sliding chamber and sealing plate, sealing plate is fixed in the higher place of sliding chamber inside by hexagon nut grommet extrusion gasket, when fire occurs, gasket melts and causes to lose friction by heat, sealing plate falls by gravity, and then can be blocked to penetration slot when fire occurs, avoid fire and smoke spread outward, and then can be ventilated in the process of daily use, seal when fire occurs, the heat of fire can be transferred to gasket by heat radiation plate through heat-conducting plugboard and heat-conducting column, and then gasket can be accelerated to melting point, so as to accelerate the starting speed of sealing plate falling, the heat radiation plate can be fixed by the L-shaped connecting plate set and the heat radiation plate can be made to fall with sealing plate, so as to increase the heat insulation of penetration slot.

Description

Technical Field

[0001] This utility model belongs to the field of fire door technology, specifically, it relates to a ventilated normally closed fire door. Background Technology

[0002] Fire doors are doors that can meet the requirements of fire resistance stability, integrity, and thermal insulation within a certain period of time. They are fire-resistant partitions with a certain degree of fire resistance, installed in fire compartments, evacuation stairwells, vertical shafts, and other similar locations.

[0003] The opening and closing status of fire doors depends on their type: they are divided into normally closed and normally open types, both designed to effectively block fire and smoke during a fire.

[0004] Normally closed fire doors are those that need to be kept closed when not in use, and are only opened temporarily for passage. They are installed in areas with low traffic, such as residential stairwells and office floor corridors.

[0005] Chinese utility model patent CN221481781U discloses a fire door that, by setting a cooling component, electrically connects a water supply pump to a smoke detector. When a fire occurs, the sensor in the smoke detector transmits an electrical signal to the central controller, which can start the water supply pump to draw water from the water tank into the water pipe and then spray it out along the atomizing nozzle.

[0006] Although the fire door can reduce the temperature of the fire door and the door frame, the fact that the normally closed fire door is closed for a long time will prevent ventilation in the stairwell or passageway. The dark and damp environment will easily breed bacteria and produce a musty smell, affecting the physical safety of pedestrians. Utility Model Content

[0007] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0008] To address the problem mentioned in the background art that although the fire door can reduce the temperature of the fire door and the door frame, the normally closed fire door will not be able to be ventilated in the stairwell or passageway due to long-term closure, which will easily lead to bacteria growth and musty smell, affecting the physical safety of pedestrians, the present invention adopts the following technical solution.

[0009] A normally closed, ventilated fire door includes a fire door frame, a fire door panel hinged to one side of the fire door frame, door handles detachably connected to the outer walls on both sides of the fire door frame, a through groove on the outer wall of the fire door frame, a sliding chamber at the top of the inner side of the through groove, a sealing plate slidably connected inside the sliding chamber, the sealing plate retracting inside the sliding chamber in normal state, and falling to seal the through groove in the event of a fire.

[0010] Preferably, one outer wall of the fireproof door panel is provided with a through sliding groove that communicates with the interior of the sliding chamber, and one outer wall of the sealing plate is fixedly connected with a threaded post that passes through the through sliding groove. A gasket is fitted on the outer wall of the threaded post, and a hexagonal nut is threaded onto the threaded post. The hexagonal nut compresses the gasket to fit against the outer wall of the fireproof door panel to fix the position of the sealing plate. After the gasket reaches its melting point and melts, the sealing plate falls down by gravity.

[0011] Preferably, the outer wall of the fireproof door panel is provided with a heat radiation plate, which absorbs heat and transfers the heat to the gasket.

[0012] Preferably, a heat-conducting column is fixedly connected to the bottom of the gasket, and a heat-conducting insert is fixedly connected to the bottom of the heat-conducting column. The heat-conducting insert is inserted into the upper end of the heat radiation plate.

[0013] Preferably, the outer wall of the heat radiation plate is fixedly connected to the horizontal edge of an L-shaped connecting plate. The horizontal edge of the L-shaped connecting plate extends into the interior of the sliding groove, and the vertical edge is fixedly connected to the outer wall of the threaded column. The L-shaped connecting plate transfers heat to the threaded column, causing the threaded column to heat up.

[0014] Preferably, a heat-conducting ring is embedded inside the gasket, and multiple heat-conducting wires extending outward are fixedly connected to the outer wall of the heat-conducting ring. The heat-conducting ring is connected to the heat radiation plate.

[0015] Preferably, a limiting head is fixedly connected to the bottom of the sealing plate, and insertion slots are provided on both sides of the bottom of the penetration groove. Insertion plates are fixedly connected to both sides of the bottom of the limiting head, and the insertion plates are inserted into the insertion slots when they fall.

[0016] Preferably, multiple grid columns are fixedly connected to the top inner side of the sliding chamber, and the bottom of each grid column is fixedly connected to the bottom inner side of the through groove. Multiple through holes are provided on the sealing plate and the limiting head, and the grid columns pass through the through holes.

[0017] Preferably, the gasket is made of polyoxymethylene.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. The sealing plate is fixed to the upper part of the sliding chamber by squeezing the gasket with a hexagonal nut. In the event of a fire, the gasket melts due to heat and loses its friction. The sealing plate falls due to gravity, thus sealing the penetration groove in the event of a fire, preventing the fire and smoke from spreading outward. This allows for ventilation during normal use and sealing in the event of a fire.

[0020] 2. The heat radiation plate can transfer the heat of the fire to the gasket through the heat-conducting plate and heat-conducting column, which can accelerate the gasket to reach the melting point, thereby speeding up the starting speed of the sealing plate falling.

[0021] 3. The L-shaped connecting plate can fix the heat radiation plate and allow it to fall with the sealing plate, thereby increasing the heat insulation at the penetration groove. On the other hand, the L-shaped connecting plate can also transfer heat to the threaded column, thus helping the gasket reach the melting point more quickly.

[0022] 4. The heat-conducting ring can transfer the heat from the heat radiation plate to each heat-conducting wire. The heat generated by multiple heat-conducting wires further accelerates the heating of the gasket, making the melting speed faster.

[0023] 5. The plug plate is inserted into the plug groove after the sealing plate, which makes the sealing plate better sealing the penetration groove after it falls, and prevents smoke from spreading outward. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a normally closed, ventilated fire door structure according to the present invention.

[0025] Figure 2 This is a schematic diagram of the fireproof door panel structure in this utility model;

[0026] Figure 3 This is a schematic diagram of the sealing plate structure in this utility model;

[0027] Figure 4 In this utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0028] Figure 5 This is a schematic diagram of the top part of the sealing plate in this utility model;

[0029] Figure 6 This is a schematic diagram of the thermal radiation plate part of this utility model.

[0030] The correspondence between the labels and component names in the attached figures is as follows:

[0031] 100. Fireproof door frame; 101. Fireproof door panel; 102. Door handle; 103. Penetrating groove; 104. Insertion groove; 105. Sliding chamber; 106. Grille column; 107. Through sliding groove;

[0032] 200. Limiting head; 201. Sealing plate; 202. Through hole; 203. Heat radiation plate; 204. Threaded post; 205. Gasket; 206. Hexagonal nut; 207. Heat-conducting post; 208. L-shaped connecting plate; 209. Heat-conducting ring; 210. Heat-conducting wire; 211. Insert plate; 212. Heat-conducting insert plate. Detailed Implementation

[0033] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0034] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0035] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments. The present invention provides the following embodiments.

[0036] like Figure 1 As shown, this is a schematic diagram of a ventilated normally closed fire door according to a preferred embodiment of the present invention. The ventilated normally closed fire door of this embodiment includes a fire door frame 100, a fire door panel 101 hinged to one side of the fire door frame 100, door handles 102 detachably connected to the outer walls on both sides of the fire door frame 100, and a through groove 103 provided on the outer wall of the fire door frame 100. In this embodiment, the through groove 103 can exchange the air in the flexible channel or stairwell blocked by the fire door panel 101 with the outside air, thereby avoiding the generation of odors and the growth of bacteria.

[0037] like Figure 2As shown, this is a schematic diagram of the fireproof door panel structure in this embodiment. A sliding chamber 105 is provided on the inner top of the penetration groove 103. Multiple grid posts 106 are fixedly connected to the inner top of the sliding chamber 105. The bottom of each grid post 106 is fixedly connected to the inner bottom of the penetration groove 103. In this embodiment, by setting the grid posts 106, it is possible to prevent people from jumping over the fireproof door panel 101 from inside the penetration groove 103 after the door is locked and passage is prohibited.

[0038] like Figure 3 As shown, this is a schematic diagram of the sealing plate structure in this embodiment. A sealing plate 201 is slidably connected inside the sliding chamber 105. A limiting head 200 is fixedly connected to the bottom of the sealing plate 201. Multiple through holes 202 are provided on the sealing plate 201 and the limiting head 200. The grid column 106 passes through the through holes 202. In this embodiment, during daily use, the limiting head 200 retracts inside the sliding chamber 105. At this time, air circulation can be achieved through the through groove 103. In the event of a fire, the sealing plate 201 falls down, thereby sealing the through groove 103 and preventing smoke and high temperature from spreading outward in the event of a fire. The setting of the limiting head 200 can limit the sealing plate 201 when it retracts inside the sliding chamber 105, and can also increase the counterweight of the sealing plate 201, making its sealing performance better after falling.

[0039] like Figure 3 as well as Figure 4 As shown, this is a schematic diagram of the automatic sealing assembly structure in this embodiment. A through-sliding groove 107 communicating with the interior of the sliding chamber 105 is provided on one outer wall of the fireproof door panel 101. A threaded post 204 extending through the through-sliding groove 107 is fixedly connected to one outer wall of the sealing plate 201. A gasket 205 is fitted onto the outer wall of the threaded post 204. A hexagonal nut 206 is threaded onto the threaded post 204. The hexagonal nut 206 compresses the gasket 205 to fit against the outer wall of the fireproof door panel 101, fixing the position of the sealing plate 201. In this embodiment, by tightening the hexagonal nut 206, the gasket 205 is compressed and fixed to a higher position inside the sliding chamber 105. In the event of a fire, the gasket 205 melts due to heat, losing its friction. The sealing plate 201 falls due to gravity, thus sealing the through-groove 103 in the event of a fire, preventing the fire and smoke from spreading outwards.

[0040] It is worth noting that the gasket 205 is made of polyoxymethylene, with a melting point of around 100℃ and a heat distortion temperature of 70℃. It has high strength, high hardness, high wear resistance and excellent mechanical properties.

[0041] like Figure 3 as well as Figure 4As shown, the outer wall of the fireproof door panel 101 is provided with a heat radiation plate 203, and a heat-conducting column 207 is fixedly connected to the bottom of the gasket 205. A heat-conducting insert plate 212 is fixedly connected to the bottom of the heat-conducting column 207. The heat-conducting insert plate 212 is inserted into the upper end of the heat radiation plate 203. In this embodiment, the heat of the fire can be transferred to the gasket 205 through the heat-conducting insert plate 212 and the heat-conducting column 207 via the heat radiation plate 203, thereby enabling the gasket 205 to reach its melting point more quickly, which in turn accelerates the starting speed of the sealing plate 201 falling.

[0042] like Figure 5 As shown, this is a schematic diagram of the top part of the sealing plate in this embodiment. The outer wall of the heat radiation plate 203 is fixedly connected to the horizontal side of the L-shaped connecting plate 208. The horizontal side of the L-shaped connecting plate 208 extends into the interior of the penetrating sliding groove 107 and the vertical side is fixedly connected to the outer wall of the threaded column 204. In this embodiment, the L-shaped connecting plate 208 can fix the heat radiation plate 203 and make the heat radiation plate 203 fall with the sealing plate 201, thereby increasing the heat insulation at the penetrating groove 103. On the other hand, the L-shaped connecting plate 208 can also transfer heat to the threaded column 204, thereby helping the gasket 205 reach the melting point more quickly.

[0043] like Figure 6 As shown, this is a schematic diagram of the structure of the heat radiation plate in this embodiment. A heat-conducting ring 209 is embedded inside the gasket 205. Multiple heat-conducting wires 210 extending outward are fixedly connected to the outer wall of the heat-conducting ring 209. The heat-conducting ring 209 is connected to the heat radiation plate 203. In this embodiment, the heat transferred by the heat radiation plate 203 can be transferred to each heat-conducting wire 210 through the setting of the heat-conducting ring 209. The heat generated by the multiple heat-conducting wires 210 further accelerates the heating of the gasket 205, making the melting speed faster.

[0044] like Figure 3 As shown, both sides of the bottom of the penetration groove 103 are provided with insertion grooves 104. The bottom sides of the limiting head 200 are fixedly connected with insertion plates 211. When the insertion plates 211 fall, they are inserted into the interior of the insertion grooves 104. In this embodiment, by inserting the insertion plates 211 into the interior of the insertion grooves 104, the sealing performance of the sealing plate 201 on the penetration groove 103 is better after it falls, thus preventing the smoke from spreading outward.

[0045] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. A normally closed, ventilated fire door, comprising a fire door frame (100), a fire door panel (101) hinged to one inner side of the fire door frame (100), and door handles (102) detachably connected to the outer walls on both sides of the fire door frame (100), characterized in that, The outer wall of the fireproof door frame (100) is provided with a through groove (103). A sliding chamber (105) is provided on the top inner side of the through groove (103). A sealing plate (201) is slidably connected inside the sliding chamber (105). The sealing plate (201) is normally retracted inside the sliding chamber (105). In the event of a fire, the sealing plate (201) falls and blocks the through groove (103).

2. The normally closed, ventilated fire door according to claim 1, characterized in that, A through sliding groove (107) communicating with the interior of the sliding chamber (105) is provided on one side of the outer wall of the fireproof door panel (101). A threaded post (204) passing through the through sliding groove (107) is fixedly connected to one side of the outer wall of the sealing plate (201). A gasket (205) is fitted on the outer wall of the threaded post (204). A hexagonal nut (206) is threaded on the threaded post (204). The hexagonal nut (206) squeezes the gasket (205) to fit against the outer wall of the fireproof door panel (101) and fixes the position of the sealing plate (201). After the gasket (205) reaches its melting point and melts, the sealing plate (201) falls down by gravity.

3. The normally closed ventilated fire door according to claim 2, characterized in that, The outer wall of the fireproof door panel (101) is provided with a heat radiation plate (203), which absorbs heat and transfers the heat to the gasket (205).

4. The normally closed ventilated fire door according to claim 3, characterized in that, A heat-conducting column (207) is fixedly connected to the bottom of the gasket (205), and a heat-conducting insert (212) is fixedly connected to the bottom of the heat-conducting column (207). The heat-conducting insert (212) is inserted into the upper end of the heat radiation plate (203).

5. The normally closed, ventilated fire door according to claim 3 or 4, characterized in that, The outer wall of the heat radiation plate (203) is fixedly connected to the horizontal side of the L-shaped connecting plate (208). The horizontal side of the L-shaped connecting plate (208) extends into the interior of the sliding groove (107) and the vertical side is fixedly connected to the outer wall of the threaded column (204). The L-shaped connecting plate (208) transfers heat to the threaded column (204), causing the threaded column (204) to heat up.

6. The normally closed ventilated fire door according to claim 4, characterized in that, A heat-conducting ring (209) is embedded inside the gasket (205). Multiple heat-conducting wires (210) extending outward are fixedly connected to the outer wall of the heat-conducting ring (209). The heat-conducting ring (209) is connected to the heat radiation plate (203).

7. The normally closed ventilated fire door according to claim 1, characterized in that, The bottom of the sealing plate (201) is fixedly connected to the limiting head (200), and the bottom of the through groove (103) is provided with insertion grooves (104) on both sides. The bottom of the limiting head (200) is fixedly connected to the insertion plate (211), and the insertion plate (211) is inserted into the insertion groove (104) when it falls.

8. The normally closed ventilated fire door according to claim 7, characterized in that, Multiple grid columns (106) are fixedly connected to the top of the inner side of the sliding chamber (105). The bottom of each grid column (106) is fixedly connected to the bottom of the inner side of the through groove (103). Multiple through holes (202) are provided on the sealing plate (201) and the limiting head (200). The grid column (106) passes through the through hole (202).

9. The normally closed, ventilated fire door according to claim 2, characterized in that, The gasket (205) is made of polyoxymethylene.

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