Fire door construction

Abstract

The utility model discloses a fireproof door structure, including the door body and being located on the door body observation window, be equipped with the liquid injection cavity in the observation window, be provided with non - transparent liquid in the liquid injection cavity, the liquid injection cavity is connected with the flow pipe, be equipped with the valve pipe on the flow pipe, be provided with the valve rod transversely in the valve pipe, be equipped with the flow hole on the valve rod, be equipped with the electromagnetic switch on the door body, the electromagnetic switch is connected with the fireproof system electricity, the utility model discloses through in non - transparent liquid, liquid injection cavity, electromagnetic valve and fireproof system linkage control, realized the intelligent switching of observation window state. Under the daily state, fill non - transparent liquid in the liquid injection cavity, effectively guarantee the privacy and safety of the space behind the door, when the fire breaks out, the fire control center triggers the electromagnetic switch action, opens the flow channel, empties the liquid, makes the observation window restore transparent, and the personnel in the door observes the external condition, makes the correct judgement, greatly promotes the safety guarantee of personnel in the fire.

Description

Technical Field

[0001] This utility model relates to the field of fire door technology, and in particular to fire door structure. Background Technology

[0002] Fire doors, as an important fire protection facility, are widely used in fire-resistant partitions of various buildings, such as stairwells, passageways, equipment rooms, and warehouses. Their core function is to effectively block the spread of fire and smoke for a certain period of time, thus buying precious time for personnel evacuation and fire rescue.

[0003] Currently, the most common fire doors on the market are mainly divided into two types: one is an integral structure without any observation window; the other is a structure with a fixed transparent observation window.

[0004] Fire doors without observation windows offer advantages such as good fire resistance, high structural strength, lower cost, and effective protection of privacy and security in areas behind the door (e.g., equipment rooms, valuables warehouses, confidential areas). However, these fire doors have a significant drawback: during a fire, personnel inside cannot observe the external fire and smoke conditions through the door. This lack of information makes it difficult for personnel to make accurate risk assessments. If the door is opened hastily in a panic, it can easily lead to a "chimney effect," allowing fresh air to rush in and fuel the fire, while simultaneously allowing hot smoke to instantly penetrate the area where personnel are located, causing serious personal injury. This defeats the original purpose of fire doors: to ensure personnel safety.

[0005] While fire doors with traditional fixed transparent observation windows solve the problem of observing external fire conditions from inside, they sacrifice privacy and security. Utility Model Content

[0006] This utility model addresses the shortcomings of existing technologies by providing a fire door structure in which the observation window is opaque under normal conditions to protect privacy, but automatically switches to a transparent state in the event of a fire, facilitating internal personnel to observe the external fire situation and make safe decisions.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a fire door structure, including a door body and an observation window provided on the door body, characterized in that: the observation window is provided with a liquid injection chamber, and the liquid injection chamber is provided with a non-transparent liquid; The injection chamber is connected to a drain pipe, and a valve tube is provided on the drain pipe. A valve stem is arranged horizontally inside the valve tube, and a drain hole that cooperates with the drain pipe is provided on the valve stem. The door is equipped with an electromagnetic switch that drives the valve stem, and the electromagnetic switch is electrically connected to the fire protection system.

[0008] In the above scheme, preferably, the door body is provided with a liquid storage tank connected to the drain pipe.

[0009] In the above scheme, preferably, one end of the valve stem is engaged with an electromagnetic switch, and the other end is provided with a return spring between it and the valve tube.

[0010] In the above scheme, preferably, the bottom of the liquid storage tank is provided with a drain pipe, the drain pipe penetrates to any side of the door body to form a drain hole, and the drain hole is provided with a sealing plug.

[0011] In the above scheme, preferably, the electromagnetic switch includes a push rod, and the valve stem is provided with a top plate that cooperates with the push rod.

[0012] In the above scheme, preferably, the sealing plug is an elastic rubber plug.

[0013] In the above scheme, preferably, the valve stem is provided with a guide plate, and the valve tube is provided with a guide hole that cooperates with the guide plate.

[0014] In the above scheme, preferably, the upper end of the drain pipe is connected to the storage tank, the lower end is provided with a through pipe, the drain holes are symmetrically arranged at both ends of the through pipe, and the through pipe is provided through the door body.

[0015] In the above scheme, preferably, the observation window is provided with an injection hole that communicates with the injection chamber.

[0016] In the above scheme, preferably, the non-transparent liquid is a dark-colored liquid and is a non-toxic and odorless liquid.

[0017] The beneficial effects of this utility model are: by linking and controlling the opaque liquid, the injection chamber, the solenoid valve and the fire protection system, this utility model realizes the intelligent switching of the observation window state.

[0018] Under normal conditions, the injection chamber is filled with a non-transparent liquid, effectively protecting the privacy and safety of the space behind the door. In the event of a fire, the fire control center triggers an electromagnetic switch to open the drainage channel, emptying the liquid and restoring the observation window to transparency. This allows personnel inside the door to observe the external situation and make correct judgments, greatly enhancing their safety during a fire. This ingenious and practical structure resolves the inherent contradiction of traditional fire doors in balancing daily privacy with visibility during a fire. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0021] Figure 3 This utility model Figure 2A magnified schematic diagram of the structure at point A in the middle. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments: See below Figures 1-3 .

[0023] A fire door structure includes a door body 1 and an observation window 2 fixedly embedded in the door body 1. The observation window 2 adopts a double-layer fireproof glass structure, and the sealed cavity between the layers forms a liquid injection chamber 201 for containing liquid. The liquid injection chamber 201 is filled with a dark-colored, non-transparent liquid, which is preferably a non-toxic, odorless liquid with good flame-retardant properties.

[0024] An injection hole connected to the injection chamber 201 can be opened on the top or side of the observation window 2 for initial filling or replenishment of liquid. The injection hole is sealed by a sealing plug during use.

[0025] The bottom of the injection chamber 201 is connected to a valve pipe 203 via a drain pipe 202; a valve stem 204 is transversely inserted inside the valve pipe 203; one or more drain holes 205 are provided on the valve stem 204; under normal conditions, the valve stem 204 is in a closed position under the action of the return spring 207, at which time the drain hole 205 is misaligned with the drain pipe 202, the drain channel is closed, the liquid in the injection chamber 201 is sealed and preserved, and the observation window 2 is opaque.

[0026] Valve pipe 203 is connected to a liquid storage tank 3 located inside the door body 1, for recovering the liquid discharged from the injection chamber 201.

[0027] An electromagnetic switch 206 is fixedly installed on the door body 1. This electromagnetic switch 206 is electrically connected to the building's automatic fire alarm system or fire control center. The top rod 208 of the electromagnetic switch 206 is directly opposite the top plate 209 located at one end of the valve stem 204. Figure 3 As shown, the top plate 209 is located at the left end of the valve stem 204, and a return spring 207 is installed between the right end of the valve stem 204 and the right end wall of the valve pipe 203. When the fire alarm is triggered, the electromagnetic switch 206 is energized, the top rod 208 extends, pushes the top plate 209 and causes the valve stem 204 to move axially against the elastic force of the return spring 207, that is, the valve stem 204 moves to the left. When the valve stem 204 moves to the predetermined position, its drain hole 205 aligns with the drain pipe 202, the drain channel is opened, and the liquid in the injection chamber 201 flows rapidly into the storage tank 3 under the action of gravity through the drain pipe 202. After the liquid is drained, the observation window 2 returns to a transparent state for easy observation.

[0028] To ensure the smooth movement and sealing of the valve stem 204, a guide plate 210 is fixedly installed on the valve stem 204, and a guide hole 211 that cooperates with the guide plate 210 is opened at the corresponding position on the inner wall of the valve tube 203 to prevent the valve stem 204 from rotating during movement.

[0029] The bottom of the liquid storage tank 3 is equipped with a drain pipe 301, which extends downward and connects to a through pipe 304 that penetrates the width of the door body 1. Drain holes 302 are formed on the two sides of the door body 1 at both ends of the through pipe 304. The drain holes 302 are sealed by elastic rubber plugs 303. When maintenance or liquid replacement is required, either plug 303 can be opened to drain the waste liquid. Simultaneously, in an emergency, the liquid can be drained by removing the plug 203, and the liquid can be absorbed by clothing or other materials used to make emergency smoke filter strips, thereby increasing the probability of escape.

[0030] The method of using the fire door structure described above: Under normal conditions, the liquid injection chamber 201 of the observation window 2 is filled with non-transparent liquid, making it opaque and effectively blocking the view, protecting privacy and safety inside the door; the entire system is in a closed standby state. When a fire occurs, the building fire alarm system is activated and sends an electrical signal to the electromagnetic switch 206. At this time, the electromagnetic switch 206 is energized and drives its push rod 208 to move. The push rod 208 pushes the top plate 209 on the valve stem 204, overcoming the resistance of the return spring 207, and causing the valve stem 204 to move. The movement of valve stem 204 aligns its drain hole 205 with the drain pipe 202, opening the drain channel. Under the action of gravity, the non-transparent liquid in injection chamber 201 flows rapidly into storage tank 3 through drain pipe 202 for storage; After the liquid is drained, observation window 2 becomes transparent, allowing personnel inside to observe the fire and smoke outside, providing a basis for safety decisions.

[0031] When maintenance or fluid replacement is required, the plug 303 on the drain hole 302 on the side of the door can be manually pulled out, and the waste liquid in the storage tank 3 will be discharged from the drain hole 302 through the drain pipe 301 and the through pipe 304.

[0032] When refilling the injection chamber 201, non-transparent liquid is refilled into the injection chamber 201 through the injection hole on the observation window 2, which can restore the fire door to its normal privacy state.

[0033] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A fire door structure, comprising a door body (1) and an observation window (2) disposed on the door body (1), characterized in that: The observation window (2) is provided with a liquid injection chamber (201), and the liquid injection chamber (201) is filled with a non-transparent liquid; The injection chamber (201) is connected to a drain pipe (202), and a valve pipe (203) is provided on the drain pipe (202). A valve stem (204) is arranged horizontally inside the valve pipe (203), and a drain hole (205) is provided on the valve stem (204) to cooperate with the drain pipe (202). The door body (1) is equipped with an electromagnetic switch (206) that drives the valve stem (204) to move. The electromagnetic switch (206) is electrically connected to the fire protection system.

2. The fire door structure according to claim 1, characterized in that: The door body (1) is equipped with a liquid storage tank (3) connected to the drain pipe (202).

3. The fire door structure according to claim 1, characterized in that: One end of the valve stem (204) is engaged with the electromagnetic switch (206), and the other end is provided with a return spring (207) between it and the valve tube (203).

4. The fire door structure according to claim 2, characterized in that: The bottom of the liquid storage tank (3) is provided with a drain pipe (301), and the drain pipe (301) extends through any side end face of the door body (1) to form a drain hole (302). The drain hole (302) is provided with a sealing plug (303).

5. The fire door structure according to claim 1, characterized in that: The electromagnetic switch (206) includes a push rod (208), and the valve stem (204) is provided with a top plate (209) that cooperates with the push rod (208).

6. The fire door structure according to claim 4, characterized in that: The sealing plug (303) is an elastic rubber plug.

7. The fire door structure according to claim 1, characterized in that: The valve stem (204) is provided with a guide plate (210), and the valve tube (203) is provided with a guide hole (211) that cooperates with the guide plate (210).

8. The fire door structure according to claim 4, characterized in that: The upper end of the drain pipe (301) is connected to the storage tank (3), and the lower end is provided with a through pipe (304). The drain holes (302) are symmetrically arranged at both ends of the through pipe (304), and the through pipe (304) passes through the door body (1).

9. The fire door structure according to claim 1, characterized in that: The observation window (2) is provided with an injection hole that communicates with the injection chamber (201).

10. The fire door structure according to claim 1, characterized in that: The non-transparent liquid is a dark-colored liquid and is non-toxic and odorless.

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