Water seal cooling fireproof door

Abstract

The fireproof door comprises a door frame installed on a wall body, a door leaf is hinged to the interior of the door frame, the door leaf comprises a door leaf body, the door frame comprises an upper frame body, a lower frame body and a frame body, communicated closed cavities are formed in the door frame and the door leaf body, the door frame is of a tubular frame structure, and the upper frame body is connected with the lower frame body. And a water distributor for simultaneously injecting water into the door frame and the door leaf is arranged in the upper cavity of the door frame. Two horizontal rows of water distribution openings which are distributed in a discontinuous and linear mode are formed in the door face of the outdoor side of the upper door frame, the water distribution openings are communicated with the water segregator, and the water distribution openings comprise upper water distribution openings and lower water distribution openings which are distributed in an up-down staggered mode. A water injection groove is formed in the top of the door leaf, a structure used for limiting the closing position of the door leaf is arranged on the door frame, and a sealing strip is fixed to the structure. The corresponding interface of the door frame and the door leaf limiting body and the sealing strip are enclosed to form an annular sealing cavity communicated with the water injection groove. The door body structure can be efficiently protected, and flame smoke can be effectively isolated.

Description

Technical Field

[0001] This invention relates to the field of fire door technology, specifically to a water-sealed cooling fire door. Background Technology

[0002] Most existing fire doors are constructed using a composite of fire-resistant and heat-insulating materials and steel structures. The gaps between the door frame and the door leaf are not completely sealed, and the sealing strips are mostly fire-resistant. When a fire occurs outside the door, the excessively high temperature will cause the door frame and door leaf to deform, allowing flames and smoke to enter the room through the gaps, resulting in injuries or fatalities and property damage.

[0003] How to effectively prevent fire from entering a room when there is no fire inside but an outdoor fire? The key lies in whether the fire door has good sealing and fire resistance. Ensuring that the door and door frame do not deform and that the door seal is airtight is crucial. Summary of the Invention

[0004] This invention proposes a water-sealed cooling fire door, the purpose of which is to solve the problems of existing products being prone to overheating and deformation during fires, and the door gaps not being properly sealed, which can easily lead to the entry of flames and smoke.

[0005] The technical solution of this invention is as follows: A water-sealed cooling fire door includes a door frame installed on a wall, a door leaf hinged within the door frame, and a door leaf including a door leaf body. The door frame includes an upper frame body located at the top of the door opening and a lower frame body located at the bottom of the door opening. A side frame body is fixed to each end of the upper and lower frame bodies. Both the door frame and the door leaf body have interconnected, sealed cavities with door frame vents. The door frame has a tubular frame structure. A water distributor is provided in the upper cavity of the door frame to simultaneously inject water into the door frame and the door leaf, and to distribute water to the outer side of the door frame. The door frame is located outside the wall. The side portion extends along the door opening towards the wall to form a shielding part that covers the gap in the door opening; the outdoor side of the shielding part is the door face, and multiple intermittent, linearly arranged water inlets are opened on the door face, and the water inlets are connected to the water distributor; the water inlets include upper water inlets and lower water inlets that are staggered vertically; a water injection groove is provided on the top of the door leaf body, and a limiting structure is formed on the door frame to restrict the closing position of the door leaf. A sealing strip is fixed on the limiting structure, and the corresponding interface between the door frame and the door leaf body and the sealing strip encloses to form a ring-shaped sealed chamber that is connected to the water injection groove.

[0006] As a further improvement of the present invention, the upper frame body, the side frame body, and the lower frame body are all sealed boxes with door frame vents; the water distributor is set in the inner cavity of the upper frame body, and the inner cavities of the upper frame body, the side frame body, and the lower frame body are interconnected through pre-drilled holes to achieve the connection of air and water passages in the inner cavity of the door frame; the lower frame body and the side frame body are provided with vents at the top to ensure that the fluid can be discharged from the overflow port at the top of the upper frame body when water is injected; the door leaf body includes an outer steel plate and an inner steel plate, and the outer steel plate and the inner steel plate are fixedly connected by a horizontal support plate; the water injection trough is opened on the support plate at the top of the door leaf body; when the door leaf is closed, the outlet of the door leaf water injection pipe is located in the range above the water injection trough to ensure that the water in the water injection pipe falls naturally into the water injection trough; the bottom of the water injection trough is provided with multiple water injection holes, and the water in the water injection trough is injected into the inner cavity of the door leaf body through the water injection holes.

[0007] As a further improvement of the present invention, the lower part of the end face of the upper frame body is provided with an upper frame water inlet hole and the upper part is provided with an upper frame vent hole; the lower part of the end face of the lower frame body is provided with a lower frame water inlet hole and the upper part is provided with a lower frame vent hole; corresponding holes are provided on the side frame body.

[0008] As a further improvement of the present invention, the water distributor includes a water distributor tank and water distribution pipes connected to the bottom of the water tank; each water distribution pipe extends upward from the bottom of the water tank, and its outlet is higher than the inner wall of the bottom of the water tank; the water distribution pipe includes an upper water distribution pipe communicating with the upper water distribution trough, and a lower water distribution pipe communicating with the lower water distribution trough, and also includes a door frame water injection pipe communicating with the upper frame body cavity; and a door leaf water injection pipe extending downward through the bottom wall of the upper frame body and sealingly connected with the bottom wall; the upper water distribution outlet is connected to the upper water distribution trough disposed in the upper frame body cavity, and the lower water distribution outlet is connected to the lower water distribution trough disposed in the upper frame body cavity.

[0009] As a further improvement of the present invention, the limiting sealing structure includes an inner limiting sealing surface and an outer limiting sealing surface. A sealing strip is fixed on the outer limiting sealing surface and the inner limiting sealing surface, respectively, and surrounds the door leaf body. The sealing strip is connected end to end and is used to fill the gap between the door frame and the door leaf body. The sealing strip includes an outer door seal and an inner door seal. When the door is closed, the outer door seal, the inner door seal and the corresponding contact surfaces on the door leaf body enclose the sealing chamber.

[0010] As a further improvement of the present invention, the door body is provided with a limiting protrusion that cooperates with the outer limiting sealing surface. The limiting protrusion is a protrusion that extends outward and cooperates with the outer limiting sealing surface. The top of the door body is also provided with a door exhaust port, which is used to discharge fluid when water is started.

[0011] As a further improvement of the present invention, the sealing strip is made of a flame-retardant, fire-resistant, water-swellable material.

[0012] As a further improvement of the present invention, the door body is provided with an independent sealed chamber for accommodating the lock, so as to prevent fluid in the inner cavity of the door body from leaking out of the installation gap of the lock and affecting the sealing effect.

[0013] As a further improvement of the present invention, the door leaf body is provided with a water injection pipe that communicates with the water injection tank, and the water injection pipe has a plurality of water outlets that communicate with the inner cavity of the door leaf body.

[0014] As a further improvement of the present invention, the door panel body is provided with two interlayer partitions arranged parallel to the door surface, and a water injection interlayer is formed between the two interlayer partitions. Each interlayer partition is provided with several water drainage holes.

[0015] Compared with the prior art, the present invention has the following advantages: (1) The fire door described in this embodiment of the invention effectively achieves active sealing of the door gaps in the event of a fire by injecting water into the internal cavities of the door frame and door leaf, and by using an outer and inner door seal made of water-swellable material. After water injection, the sealing strip expands rapidly and tightly fills the gap between the door frame and door leaf, thereby reliably preventing the spread of flames and high-temperature smoke into the room. At the same time, the water inside the door, as a medium with high specific heat capacity, can absorb and store a large amount of heat, significantly delaying the temperature rise of the metal structure (door frame, door leaf) and greatly improving the heat insulation performance of the door. It can be automatically or manually activated when a fire starts outside the door.

[0016] (2) The fire door described in this embodiment of the invention, through its structure of a water-filling groove at the top of the door leaf and multiple water-filling holes at the bottom, ensures that pressurized water is injected quickly, dispersedly, and evenly into the internal cavity of the door leaf. This avoids local water flow impact or uneven filling that may be caused by single-point water injection, significantly shortening the time it takes for the door leaf to be completely filled with water. This allows the door leaf to quickly establish a heat storage body in the early stages of a fire, efficiently absorb heat, and delay the temperature rise of the door leaf itself. The water-filling groove is located on the horizontal support plate at the top of the door leaf, avoiding large-area openings in the main load-bearing steel plates (outer steel plate and inner steel plate) of the door leaf. This design maximizes the overall structural strength and rigidity of the door leaf as a sealed box, ensuring that it is not easily deformed or failed when subjected to internal water pressure and possible external impacts.

[0017] (3) The fire door described in this embodiment of the invention, through the staggered and intermittently distributed upper and lower water outlets on the upper door surface of the door frame shielding part, can form a complete and uniformly flowing water curtain covering the outer surface of the door leaf and part of the door frame area. This can continuously remove the heat transferred from the door surface by fire radiation or convection, forming a synergistic cooling mechanism of "internal storage and external flushing" with the internal water storage cooling. Furthermore, when the internal water vaporizes and overflows, the overflow water flows down the door surface to form an additional cooling flow, constituting a third layer of cooling protection, significantly reducing the overall temperature of the door, and making the heat transfer blocking effect more thorough.

[0018] (4) The fire door described in this embodiment of the invention has a door frame composed of standardized sealed box modules such as an upper frame body, a side frame body, and a lower frame body connected by preset holes, which simplifies the overall structure and facilitates standardized production and on-site assembly. The drain outlet with threaded sealing parts (such as countersunk plugs) at the bottom of the door frame and door leaf provides convenience for regular maintenance, drainage, and cleaning of the system. The door frame is connected to the pre-embedded anchors through connecting through holes with stepped threads, ensuring stable installation and good sealing.

[0019] (5) The fire door described in this embodiment of the invention automatically completes the entire process from automatic detection, water injection, air venting, water curtain formation to sealing strip expansion, forming a complete active fire protection system. Its dynamic water replenishment mechanism can automatically adjust according to the fire temperature (affecting the vaporization rate), maintaining the system in the best working state, providing stable, reliable and adaptive multiple fire protections, greatly improving the initiative and effectiveness of building fire safety protection. It can also be manually opened, improving the flexibility of system use. Attached Figure Description

[0020] Figure 1 This is a front view of the door structure (including the door frame and door leaf) in an embodiment of the present invention. Figure 2 This is a top view of the door in an embodiment of the present invention; Figure 3 for Figure 1 Section I-I; Figure 4 for Figure 1 Section II-II; Figure 5 for Figure 1 Section III-III; Figure 6 This is a schematic diagram of the door frame structure in an embodiment of the present invention (this diagram is used to show the arrangement of the outer door seal and the inner door seal); Figure 7 for Figure 6 Sectional view of section IV-IV; Figure 8 This is a top view of the door leaf in an embodiment of the present invention.

[0021] Figure 9 for Figure 8 Sectional view of V-V.

[0022] Explanation of reference numerals in the attached figures: 1. Upper frame body; 101. Upper frame vent; 2. Upper water distribution trough; 3. Upper water distribution inlet; 4. Lower water distribution trough; 5. Lower water distribution inlet; 6. Door leaf vent; 7. Outer door seal; 8. Door leaf body; 801. Water inlet trough; 802. Water inlet hole; 9. Filling material; 10. Sealed chamber; 11. Lower frame body; 12. Lower frame water inlet hole; 13. Lower frame vent; 14. Frame body; 15. Inner door seal; 16. Upper frame water inlet hole; 17. Water inlet pipe; 18. Water distributor tank; 19. Door frame water inlet pipe; 20. Door leaf water inlet pipe; 21. Lower water distribution pipe; 22. Upper water distribution pipe; 23. Overflow outlet; 24. Temperature sensor; 25. Door frame fixing hole; 26. Air collection chamber; 27. Water inlet interlayer; 28. Interlayer partition; 29. ​​Drainage hole. Detailed Implementation

[0023] The technical solutions and effects of the present invention will be described in detail below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0024] like Figure 1 As shown, an embodiment of a water-sealed cooling fire door includes a door frame installed on a wall, with a door leaf hinged within the frame. Both the door frame and the door leaf are made of sheet metal. A temperature sensor 24, which is signal-connected to a control unit, is installed on the door frame.

[0025] The door frame includes an upper frame body 1 located at the top of the doorway and a lower frame body 11 located at the bottom of the doorway. A side frame body 14 is fixed to each end of the upper frame body 1 and the lower frame body 11. The upper frame body 1, the side frame body 14, and the lower frame body 11 are all sealed boxes with side vents. Their internal cavities are interconnected through pre-drilled holes, forming a continuous water injection channel. Vents are provided at the top of the lower frame body 11 and the side frame body 14 to ensure that air can escape during water injection, ultimately discharging from the overflow port 23 at the top of the upper frame body 1.

[0026] Specifically, in combination Figure 4 and Figure 5 As shown, the upper frame body 1 has a water inlet 16 in the lower part of its end face and an upper frame vent 101 in the upper part; the side frame body 14 has a water inlet 12 in the lower part of its end face corresponding to the lower part of its end face and a vent 13 in the upper part. The side frame body 14 has corresponding holes to connect the air and water passages in the inner cavity of the door frame.

[0027] Combination Figure 2 and Figure 4As shown, the portions of the frame body 14 and the upper frame body 1 located on the outside of the wall extend along the door opening towards the wall to form a shielding portion that covers the gap in the door opening. The interior of the shielding portion is connected to the cavities of the corresponding door frame components, namely the upper frame body 1, the frame body 14, and the lower frame body 11. The outdoor side of the shielding portion is the door facade, which has two horizontal rows of intermittently arranged water inlets, including an upper water inlet 3 and a lower water inlet 5, which are staggered vertically. This intermittent staggered arrangement can form a complete water curtain to cover the entire door leaf and the door frame below the water inlets, and is beneficial to maintaining the structural strength of the upper frame body 1. The upper water inlet 3 is connected to the upper water distribution trough 2 located in the cavity of the upper frame body 1, and the lower water inlet 5 is connected to the lower water distribution trough 4 located in the cavity of the upper frame body 1.

[0028] Combination Figure 4 and Figure 6 As shown, the door frame is equipped with a limiting and sealing structure, which restricts the rotation angle of the door leaf and constrains its closed position. The limiting and sealing structure includes an outer limiting and sealing surface and an inner limiting and sealing surface. Sealing strips are fixed to both the outer and inner limiting and sealing surfaces, encircling the door leaf body 8. The sealing strips are connected end-to-end to form an outer door seal 7 and an inner door seal 15, used to fill the gap between the door frame and the door leaf body 8. The sealing strips are made of flame-retardant, fire-resistant, and water-swellable materials, such as water-swellable flame-retardant rubber, water-swellable flame-retardant polyurethane, bentonite-based water-swellable flame-retardant materials, or water glass-based water-swellable flame-retardant materials.

[0029] Combination Figure 3 and Figure 7 As shown, the frame body 14 has a sealing connection with a connecting through hole with stepped threads, which is used to fix and connect with the anchors embedded in the wall.

[0030] Combination Figure 3 and Figure 8 As shown, the door body 8 includes an outer steel plate and an inner steel plate, which are fixedly connected by a horizontal support plate to form a sealed box. Figure 4 The door leaf body 8 has a cavity inside, and a water inlet trough 801 is provided on the support plate at the top of the door leaf body 8. When the door is closed, the outlet of the door leaf water inlet pipe 20 is located above the water inlet trough 801 to ensure that the water in the water inlet pipe 20 falls naturally into the water inlet trough 801. The outer door seal 7 and the inner door seal 15, together with the corresponding contact surfaces on the door frame and the door leaf body 8, form an annular sealed chamber 10 that communicates with the water inlet trough 801. The bottom of the water inlet trough 801 is provided with multiple water inlet holes 802, and the water in the water inlet trough 801 is injected into the cavity of the door leaf body 8 through the water inlet holes 802.

[0031] The door body 8 is provided with a limiting protrusion that mates with the outer limiting sealing surface. The limiting protrusion is a protrusion that extends outward and mates with the outer limiting sealing surface. The top of the door body 8 is also provided with a door exhaust port 6, which can discharge incompletely vaporized water when water is started.

[0032] The door body 8 has an independent sealed chamber to accommodate the lock, preventing water from leaking from the lock installation gap and affecting the sealing effect.

[0033] Furthermore, the door body 8 is provided with a water injection pipe that communicates with the water injection tank 801, and the water injection pipe has multiple water outlets that communicate with the inner cavity of the door body 8.

[0034] Optionally, to improve the water injection speed, the door body 8 is provided with two interlayer partitions 28 arranged parallel to the door surface, and a water injection interlayer 27 is formed between the two interlayer partitions 28. Each interlayer partition 28 has several water drainage holes 29. The top and bottom of the water injection interlayer 27 are connected to the internal cavity of the door body 8.

[0035] Furthermore, a drain outlet is provided at the bottom of the door frame and door leaf body 8, and a threaded seal is connected to the drain outlet. Specifically, the threaded seal is a countersunk plug.

[0036] The upper frame body 1 cavity is equipped with a water distributor connected to a water source via a water inlet pipe 17. The water distributor includes a water distributor tank 18 and water distribution pipes connected to the bottom of the tank. Each water distribution pipe extends upward from the bottom of the tank, with its outlet higher than the inner wall of the tank bottom. This design facilitates installation and positioning, ensures that when the water level in the tank reaches a set height, each water distribution pipe can start distributing water simultaneously, and effectively prevents sediment from clogging the pipe openings. The water distribution pipes include an upper water distribution pipe 22 communicating with the upper water distribution trough 2, a lower water distribution pipe 21 communicating with the lower water distribution trough 4, a door frame water injection pipe 19 communicating with the upper frame body 1 cavity, and a door leaf water injection pipe 20 extending downward through the bottom wall of the upper frame body 1 and sealingly connected to the bottom wall.

[0037] The door leaf body 8 is hinged to the door frame via a pressure-sealed hinge. Specifically, the pressure-sealed hinge can achieve a reliable dynamic seal at its rotating parts, thereby effectively preventing water leakage from the hinge installation gaps when the door leaf body 8 and the inner cavity of the door frame are filled with pressurized water.

[0038] Specifically, the pressure-sealed hinge includes an upper mounting base fixed to the top of the door frame and a lower mounting base fixed to the top of the door leaf body 8. The upper mounting base, bearing, and lower mounting base are connected in series via a hinge shaft, wherein the bearing is press-fitted into the bearing hole of the upper mounting base to support the hinge shaft. On the side of the bearing near the inner cavity of the door leaf body 8, a rotating ring is interference-fitted onto the hinge shaft, and correspondingly, a stationary ring is fixed on the upper mounting base. The ball-type axial end-face sealing assembly is disposed between the end faces of the rotating ring and the stationary ring. During assembly, an elastic preload force simultaneously and tightly presses all the balls against the two end faces, forming a multi-stage rolling contact sealing band.

[0039] When the hinge rotates, the balls primarily experience rolling friction on their end faces, thus significantly reducing rotational torque and long-term wear while ensuring a tight seal for high-pressure media. Combined with the static sealing structure at the installation interface, this achieves zero leakage and long-term reliable operation of the water-filled door frame and door leaf under pressure conditions.

[0040] Working principle: When a fire occurs and the ambient temperature reaches a set threshold, the temperature sensor 24 installed on the door frame sends a signal to the control unit, triggering the water supply system to start and continuously inject water into the cavity inside the door frame and door leaf.

[0041] Pressurized water enters the distributor tank 18 through the inlet pipe 17, simultaneously filling the door frame and door leaf. Water enters the cavity of the upper frame body 1 through the door frame water inlet pipe 19, continuously filling the cavity of the entire door frame through preset channels. Simultaneously, water is injected into the water inlet trough 801 at the top of the door leaf body 8 through the door leaf water inlet pipe 20, and then flows into the internal cavity of the door leaf through multiple water inlet holes 802 at the bottom of the water inlet trough 801. During the water injection process, the gas inside the door frame rises with the water level, flowing upwards through channels such as the lower frame body 11 and the upper frame vent 13 and upper frame vent 101 at the top of the side frame body 14, and finally exiting from the overflow port 23 at the top of the upper frame body 1. The gas inside the door leaf cavity is discharged through the door leaf vent 6 at the top of the door leaf, ensuring that the cavity is completely filled with water.

[0042] Meanwhile, water is delivered to the upper water distribution trough 2 and the lower water distribution trough 4 through the upper water distribution pipe 22 and the lower water distribution pipe 21 respectively. The water flows out through the upper water distribution outlets 3 and the lower water distribution outlets 5 that are staggered and intermittently distributed on the door surface and is washed downward under the action of gravity. The water flows out and forms a flowing water curtain that completely covers the outer surface of the door leaf and the door frame area below the water distribution outlets. This removes the heat from the surface of the door and significantly reduces the temperature of the door's metal structure, thereby effectively preventing heat from being transferred into the door.

[0043] After the door is filled, the water overflowing from the water tank 801 flows downward into the sealing chamber 10, and then, under pressure, fills the entire sealing chamber 10. The sealing strip expands when it comes into contact with water, thus achieving an active seal of the door gap and preventing flames and smoke from entering the room.

[0044] Under continuous heating conditions during a fire, the system enters a dynamic equilibrium phase. Water that has not fully vaporized inside the door leaf body 8 and the door frame cavity is discharged through exhaust channels such as the door leaf exhaust port 6 and the overflow port 23 on the upper frame body 1. The system maintains its water level through continuous water replenishment.

[0045] When the water replenishment rate exceeds the vaporization rate, liquid water overflows from the door exhaust port 6 and the overflow port 23 on the upper frame body 1. The overflowing water flows down along the top of the door and the surface of the door frame, forming an additional cooling water flow, which can further enhance the cooling effect and form multiple cooling protections.

[0046] Throughout operation, the pressure-sealed hinges, through their unique ball-bearing axial end-face sealing structure combined with a static seal, ensure zero leakage in the rotating parts of the door under internal water pressure. Simultaneously, an independent lock chamber within the door effectively prevents water leakage from the lock mounting holes. The reliable sealing of these key components guarantees long-term, stable operation of the system even when filled with pressurized water.

[0047] The water-sealed cooling fire door described in this embodiment achieves efficient protection of the door structure and isolation of flames and smoke through the synergistic effect of water injection energy storage cooling, door surface water curtain cooling and water expansion sealing, with the help of a reliable dynamic sealing and continuous water replenishment mechanism, which helps to increase escape opportunities and reduce property losses.

[0048] It should be noted that, as will be apparent to those skilled in the art, the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics thereof. The scope of the present invention is defined by the claims rather than the foregoing description.

Claims

1. A water-sealed cooling fire door, comprising a door frame installed on a wall, a door leaf hinged within the door frame, the door leaf comprising a door leaf body (8), the door frame comprising an upper frame body (1) located at the top of the door opening, a lower frame body (11) located at the bottom of the door opening, and a side frame body (14) fixed to each end of the upper frame body (1) and the lower frame body (11), characterized in that: The door frame and the door body (8) are provided with airtight cavities which are communicated and provided with door frame exhaust ports. The door frame is a tubular frame structure. A water distributor is arranged in the upper cavity of the door frame to simultaneously inject water into the door frame and the door body and to distribute water to the outer side of the door frame. The part of the door frame which is located outside the wall extends along the door opening to the wall to form a shielding part which shields the gap of the door opening. The outer side of the shielding part is a door surface. Horizontal two rows of water distribution ports are arranged on the door surface in an intermittent linear arrangement. The water distribution ports are communicated with the water distributor. The water distribution ports include upper water distribution ports (3) and lower water distribution ports (5) which are arranged in an upper and lower staggered manner. The door body (8) is provided with a water injection groove (801) at the top. A limiting structure is formed on the door frame to limit the closing position of the door. A sealing strip is fixed on the limiting structure. The corresponding interface between the door frame and the door body (8) and the sealing strip form a sealing chamber (10) which is communicated with the water injection groove (801) and is annular.

2. The water sealed cooling fireproof door according to claim 1, characterized in that: The upper frame body (1), the side frame body (14) and the lower frame body (11) are airtight boxes provided with door frame exhaust ports. The water distributor is arranged in the inner cavity of the upper frame body (1). The inner cavities of the upper frame body (1), the side frame body (14) and the lower frame body (11) are communicated with each other through pre-formed holes to realize the communication of the air path and the water path in the inner cavities of the door frame. The upper part of the lower frame body (11) and the side frame body (14) is provided with exhaust holes to ensure that the fluid can be finally discharged from the overflow port (23) at the top of the upper frame body (1) during water injection. The door body (8) includes an outer steel plate and an inner steel plate which are fixedly connected by a horizontal support plate. The water injection groove (801) is arranged on the support plate at the top of the door body (8). When the door is closed, the water outlet of the door water injection pipe (20) is located in the range above the water injection groove (801) to ensure that the water in the water injection pipe naturally falls into the water injection groove (801). The water injection groove (801) is provided with a plurality of water injection holes (802) at the bottom. The water in the water injection groove (801) is injected into the inner cavity of the door body (8) through the water injection holes (802).

3. The water sealed cooling fireproof door according to claim 1, characterized in that: The end surface of the upper frame body (1) is provided with an upper frame water inlet hole (16) at the lower part and an upper frame exhaust hole (101) at the upper part. The end surface of the lower frame body (11) is provided with a lower frame water inlet hole (12) at the lower part and a lower frame exhaust hole (13) at the upper part. The side frame body (14) is provided with corresponding holes.

4. The water sealed fire protection door of claim 1, wherein: The water distributor comprises a water distributor water tank (18) and a water distributor pipe connected at the bottom of the water tank; each water distributor pipe extends upward from the bottom of the water tank, and the water outlet thereof is higher than the inner wall of the bottom of the water tank; the water distributor pipe comprises an upper water distribution pipe (22) in communication with an upper water distribution groove (2), a lower water distribution pipe (21) in communication with a lower water distribution groove (4), a door frame water injection pipe (19) in communication with a cavity of an upper frame body (1), and a door leaf water injection pipe (20) extending downward and penetrating through the bottom wall of the upper frame body (1) and being in sealing connection with the bottom wall; an upper water distribution outlet (3) is in communication with the upper water distribution groove (2) arranged in the cavity of the upper frame body (1), and a lower water distribution outlet (5) is in communication with the lower water distribution groove (4) arranged in the cavity of the upper frame body (1).

5. The water sealed fire protection door of claim 1, wherein: The limiting and sealing structure comprises an inner limiting and sealing surface and an outer limiting and sealing surface, and a sealing strip is fixed on the outer limiting and sealing surface and the inner limiting and sealing surface and arranged around the door leaf body (8); the sealing strips are connected at the head and tail and used for filling the gap between the door frame and the door leaf body (8); the sealing strips comprise an outer door seal (7) and an inner door seal (15); when the door is closed, the outer door seal (7), the inner door seal (15) and the corresponding contact surfaces on the door leaf body (8) enclose the sealing chamber (10).

6. The water sealed fire door of claim 5, wherein: The door leaf body (8) is provided with a limiting protrusion matched with the outer limiting and sealing surface; the limiting protrusion is a protrusion extending outward and matched with the outer limiting and sealing surface; the top of the door leaf body (8) is further provided with a door leaf exhaust port (6) used for discharging fluid when water injection is started.

7. The water sealed fire protection door of claim 1, wherein: The sealing strip is made of a fire-retardant, fireproof, water-swelling material.

8. The water sealed fire protection door of claim 1, wherein: The door leaf body (8) is provided with an independently sealed chamber used for accommodating a lock, so as to prevent fluid in the inner cavity of the door leaf body (8) from leaking from the mounting gap of the lock and affecting the sealing effect.

9. The water sealed fire protection door of claim 1, wherein: The door leaf body (8) is provided with a water injection pipe in communication with the water injection groove (801); a plurality of water outlets in communication with the inner cavity of the door leaf body (8) are arranged on the water injection pipe.

10. The water sealed fire protection door of claim 1, wherein: The door leaf body (8) is provided with two interlayer partitions (28) arranged in parallel with the door surface; an interlayer (27) is arranged between the two interlayer partitions (28); a plurality of water dispersing holes (29) are arranged on each interlayer partition (28).

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