A grout fire door

Abstract

The utility model relates to fireproof door technical field especially is publicized a kind of grouting fireproof door, including door leaf framework, the door leaf framework is formed by splicing two vertical keels and two horizontal keels, two reinforcing cross beams are fixed in the door leaf framework inside and are arranged in parallel with horizontal keel, at least one vertical keel is provided with several exhaust holes in length direction on side wall, the exhaust hole is the taper structure of inside big and outside small, the small end diameter of the exhaust hole does not exceed five millimeters, fireproof core plate is formed in the door leaf framework, the door leaf framework is wrapped with outer sleeve outside. Advantageous effect lies in: by setting up the taper exhaust hole of inside big and outside small in vertical keel side wall, and strictly control small end diameter, reliable passage is provided for air exhaust in pouring process, compared with pre-buried easily deformed vent pipe, the exhaust hole position fixed, not easy to shift, can ensure that gas is smoothly discharged, significantly reduce the bubble and cavity in the interior after fireproof slurry solidification.

Description

Technical Field

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

[0002] Fire doors are doors that can meet the requirements of fire resistance stability, integrity, and thermal insulation for a certain period of time. They are fire-resistant partitions with a certain degree of fire resistance, installed in fire-resistant compartments, evacuation stairwells, vertical shafts, and other similar locations. In addition to the functions of ordinary doors, fire doors also prevent the spread of fire and smoke, ensuring safe evacuation for a certain period. There are many types of fire doors, mainly classified by material as wooden fire doors, steel fire doors, steel-wood fire doors, and other types.

[0003] Wooden fire doors refer to doors with frames, leaf skeletons, and leaf panels made of fire-retardant wood or fire-retardant wood products. The frame and leaf are connected by double tenons. After the frame and leaf are assembled, fire-retardant and corrosion-resistant coatings are sprayed onto the wooden door to meet fire resistance requirements. Currently, many fire door leaves are made by directly casting fire-retardant materials. If air cannot be expelled during casting, it will cause hollow areas, affecting the quality of the fire door. Many manufacturers use vent pipes embedded in the door frame for ventilation during casting, but these vent pipes are prone to deformation and misalignment during casting, affecting usability. Utility Model Content

[0004] This utility model proposes a grouting fireproof door to solve the above-mentioned problems.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A grouting fireproof door includes a door frame. Wooden mounting protrusions are provided inside the door frame at positions corresponding to the lock and door closer installation locations. The thickness of the wooden mounting protrusions is the same as the thickness of the door frame. The door frame is composed of two vertical joists and two horizontal joists. Two reinforcing beams, parallel to the horizontal joists, are fixed inside the door frame. A through groove is formed on each reinforcing beam. One horizontal joist is not flush with the end of the vertical joist and has a grouting groove formed on its end face. The size of the grouting groove is smaller than the size of the through groove. An end cap is fastened to the outside of the horizontal joist with the grouting groove. One side of the end cap is flush with the ends of the two vertical joists. At least one vertical joist has several vent holes on its side wall along its extension direction. The vent holes are conical structures, larger inside and smaller outside, with the small end diameter not exceeding five millimeters. A fireproof core board is formed inside the door frame, and the door frame is wrapped with an outer sleeve.

[0007] Furthermore, at least one reinforcing connection groove is formed on the inner wall of the door frame, the depth of the reinforcing connection groove is one to two centimeters, and the wooden mounting boss is fixed to the door frame as a whole by means of mortise and tenon joints.

[0008] Furthermore, the fireproof core board is formed by casting, and the thickness of the fireproof core board is the same as the thickness of the door frame.

[0009] Furthermore, the outer casing can be either a thin sheet of iron or a decorative panel.

[0010] Furthermore, a sealing device is installed inside the exhaust port. The sealing device includes a plug cap, a spring is fixed to the side of the plug cap facing the small end of the exhaust port, and a limit ring is fixed to the side of the large end of the exhaust port. The inner diameter of the limit ring is larger than the outer diameter of the plug cap. When the spring naturally extends, one end of the plug cap is attached to the limit ring.

[0011] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0012] 1. By opening conical vent holes with a larger inner diameter and a smaller outer diameter on the side wall of the vertical keel, and strictly controlling the diameter of the smaller end, a reliable channel for air to be discharged during the pouring process is provided. Compared with pre-embedded vent pipes that are easily deformed, these vent holes, which are directly opened on the structural components, are fixed in position and not easy to move. This ensures that the gas can be discharged smoothly, significantly reduces the air bubbles and cavities inside the fireproof mortar after curing, improves the density and uniformity of the core board, and thus ensures the fire resistance performance of the fire door.

[0013] 2. The unique vent sealing device is ingeniously designed and pre-installed before grouting. During grouting, the gas pressure pushes open the cap to release the gas. After the grout is filled in place, the spring pushes the cap to automatically reset and seal the small hole. This eliminates the cumbersome steps of traditional pre-embedded pipe positioning, fixing and post-processing, avoids the failure risk caused by deformation and misalignment of the vent pipe, simplifies the production process and improves process stability and efficiency. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a perspective view of the present invention;

[0016] Figure 2 This is a cross-sectional view of the present invention;

[0017] Figure 3 This is a structural diagram of the door frame of this utility model;

[0018] Figure 4 This is a schematic diagram of the installation of the sealing device of this utility model.

[0019] The annotations in the attached figures are explained as follows:

[0020] 1. Door frame; 2. Wooden mounting boss; 3. Reinforcing beam; 4. Vent hole; 5. Fireproof core board; 6. Outer sleeve; 7. Grouting groove; 8. Through groove; 9. Reinforcing connection groove; 10. End sealing plate; 11. Sealing device; 12. Spring; 13. Plug cap; 14. Limiting ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figures 1-3As shown, a grouted fireproof door includes a door frame 1. Wooden mounting bosses 2 are provided inside the door frame 1 at positions corresponding to the lock and door closer installation. These wooden mounting bosses 2 provide a stable, easy-to-drill, and screw-fixed mounting base for the lock and door closer, overcoming the problems of loosening or insufficient strength when directly installed on fireproof grout or metal frames. The thickness of the wooden mounting bosses 2 is the same as the thickness of the door frame 1, ensuring a flat installation surface and facilitating subsequent overall covering and surface treatment of the door. The door frame 1 is composed of two vertical joists and two horizontal joists, forming a basic rectangular frame structure, providing structural support and space to accommodate the fireproof core board 5. Two reinforcing beams 3 are fixed inside the door frame 1, parallel to the horizontal joists. The reinforcing beams 3 enhance the overall rigidity and deformation resistance of the door frame 1, providing additional support, especially in the middle area of ​​the door height direction. The reinforcing beams 3 have fully penetrating through grooves 8 formed on them. The through-groove 8 allows the fireproof grout to flow smoothly during the grouting process, connecting the spaces on both sides of the reinforced beam 3. This ensures that the fireproof core board 5 forms a continuous, void-free integral structure within the door frame 1, improving the uniformity of fireproofing and heat insulation. One of the horizontal and vertical keels has a non-flush end with a grouting groove 7 formed on its end face. The grouting groove 7 serves as the main grouting inlet, and its location is designed on the non-flush end face of the horizontal keel to facilitate grouting operations and subsequent sealing. The size of the grouting groove 7 is smaller than that of the through-groove 8. This design ensures sufficient grout flow to meet grouting efficiency while preventing grout from being trapped during the initial grouting process. Excessive splashing or poor backflow due to excessive pressure can be mitigated by dimensional differences, which help control the grouting process. An end sealing plate 10 is snapped onto the outer side of the horizontal keel with grouting grooves 7. One side of the end sealing plate 10 is flush with the ends of the two vertical keels. The main function of the end sealing plate 10 is to seal the grouting grooves 7, preventing the cured fireproof grout from being exposed. Simultaneously, its flush side with the vertical keels ensures a smooth and aesthetically pleasing door leaf end face. The snap-fit ​​fixing method facilitates installation and disassembly. At least one vertical keel has several vent holes 4 on its side wall along its extension direction. These vent holes 4 are used to discharge grout from the door leaf frame 1 cavity during the grouting process. The air inside is prevented from forming cavities or voids, ensuring that the fireproof core board 5 is filled tightly. The vent hole 4 has a conical structure with a larger inner diameter and a smaller outer diameter. The diameter of the small end of the vent hole 4 does not exceed five millimeters, and the diameter of the large end is 3-4 cm. The conical structure (larger inner diameter and smaller outer diameter) combined with the design of limiting the diameter of the small end (≤5 mm) can ensure that the gas can be discharged smoothly and effectively prevent the liquid slurry from leaking out in large quantities under the injection pressure. The impact of the small diameter on the fireproof performance is also minimized. At the same time, it is easy to seal the outside to reduce the leakage of fireproof slurry. The fireproof core board 5 is formed inside the door frame 1, and the door frame 1 is wrapped with an outer sleeve 6.

[0023] In another preferred embodiment of the present invention, at least one reinforcing connecting groove 9 is formed on the inner wall of the door frame 1. The depth of the reinforcing connecting groove 9 is one to two centimeters. The wooden mounting boss 2 is engaged in the reinforcing connecting groove 9 and fixed to the door frame 1 as a whole by means of a mortise and tenon structure. This mortise and tenon connection design provides a very strong and reliable mechanical connection, ensuring that the wooden mounting boss 2 will not loosen or fall off during the use of the door (such as frequent opening and closing of the door, or the force exerted by the lock operation). The 1-2 cm deep reinforcing connecting groove 9 provides sufficient interlocking area to withstand the large load generated when installing locks and door closers. At the same time, this non-metallic connection method avoids the metal thermal bridge effect, which is conducive to maintaining the overall fire resistance performance of the door.

[0024] In another preferred embodiment of the present invention, the fireproof core board 5 is formed by casting, that is, by pouring fireproof slurry and curing it. The thickness of the fireproof core board 5 is the same as the thickness of the door frame 1. This design ensures that the fireproof core board 5 completely fills the internal space of the door frame 1, so that the door leaf obtains the maximum effective fireproof and heat insulation layer thickness. The consistency with the frame thickness also ensures the uniformity of the overall structural strength of the door leaf, avoiding insufficient local strength due to the core board being too thin or stress concentration in the frame due to the core board being too thick.

[0025] In another preferred embodiment of the present invention, the outer sheath 6 can be either a thin sheet metal or a decorative panel. The thin sheet metal outer sheath 6 provides a robust surface protection layer, enhancing the impact resistance and durability of the door leaf; the decorative panel (such as fireproof board, wood veneer, etc.) mainly provides an aesthetically pleasing surface decoration effect, meeting different usage scenarios and aesthetic needs. Both types of outer sheaths 6 wrap around the outer surface (six sides) of the door leaf frame 1, forming the final door leaf appearance and providing an additional physical protection layer.

[0026] As another preferred embodiment of the present invention, such as Figure 4As shown, a sealing device 11 is installed inside the vent hole 4 to automatically or passively seal the vent hole 4 after grouting, reducing grout leakage during pouring and preventing external moisture, smoke, or flames from entering the door leaf through the vent hole during use, while maintaining the integrity of the door leaf's appearance. The sealing device 11 includes a cap 13, with a spring 12 fixed to the cap 13 facing the small end of the vent hole 4, and a limiting ring 14 fixed to the large end of the vent hole 4. The inner diameter of the limiting ring 14 is larger than the outer diameter of the cap 13. When the spring 12 naturally extends, one end of the cap 13 fits against the limiting ring 13. During grouting, grout pressure or airflow can overcome the elastic force of the spring 12 and push the cap 13 towards the small end of the vent hole 4 (compressing the spring), opening the venting channel; when the grout begins to contact the cap, the grout overcomes the elastic force of the spring 12 and pushes the cap 13 tightly against the inner wall of the conical small end of the vent hole 4, achieving automatic sealing. The function of the limiting ring 14 is to limit the travel of the plug cap 13 in the large end cavity of the exhaust port 4 and prevent it from falling out. The design of the inner diameter of the limiting ring 14 being larger than the outer diameter of the plug cap 13 ensures that the plug cap 13 has enough room to move in the large end cavity of the exhaust port 4 and will not obstruct the gas discharge path.

[0027] The working principle of this utility model is as follows: When manufacturing the door panel, first insert the plug cap 13 with spring 12 into the large end of the exhaust hole 4, then insert the limiting ring 14 into the exhaust hole 4. By striking or impacting with external force, the limiting ring 14 is firmly locked into the inner wall of the exhaust hole 4, thereby limiting the position of the plug cap 13 and ensuring that the sealing device 11 is assembled in place and functions reliably. Using mortise and tenon joints, install the two reinforcing beams 3 and the two horizontal keels between the two vertical keels. Then, install the wooden mounting boss 2 into the reinforcing connecting groove 9 and fix it. After installing the wooden mounting boss 2... Mold plates are fixed on both the front and back sides of the door frame 1. Then, magnesium sulfate, magnesium oxide, magnesium chloride, and silica gel are mixed evenly. Plant fiber powder mixture is added, and stirring continues. Tourmaline and diatomaceous earth can be added as needed. Finally, an appropriate amount of water is added and stirred evenly to form a slurry. The slurry is injected into the interior of the door frame 1 through the injection groove 7, compacted, cured, demolded, dried, and cut to form a magnesium sulfate-oxygenate foamed fireproof core board 5. The magnesium sulfate-oxygenate-based material (magnesium sulfate, magnesium oxide, and magnesium chloride) serves as the main matrix, providing excellent fire resistance, heat insulation, and lightweight properties. Silica gel enhances the material's adhesion and water resistance. The plant fiber powder mixture, as a lightweight filler and reinforcing material, improves toughness, reduces density, and helps form a porous structure to improve heat insulation performance. Tourmaline and diatomaceous earth serve as functional fillers; tourmaline releases negative ions and may improve fire resistance, while diatomaceous earth enhances adsorption properties and provides some humidity control and auxiliary fireproofing effects. During grouting, the internal air is discharged through the vent 4 and its internal sealing device 11 (at this time, the plug cap 13 is pushed open by air pressure or grout) until the grout reaches 2-3cm inside the grouting tank 7 and then stops. This liquid level indicates that the inside is basically filled. A small amount of space is reserved to prevent the grout from solidifying and expanding and overflowing. Then wait for the grout to solidify to form the fireproof core board 5. After the fireproof core board 5 is formed, install the end sealing plate 10 at the end of the door frame 1 to seal the grouting tank 7 and completely seal the grouting inlet. Then attach the outer sleeve 6 to the outer surface of the door frame 1 (six sides: front, back, left, right, top, and bottom) to form the fireproof door panel. Store it in the warehouse for use. The outer sleeve 6 provides the final protective layer and decorative surface, and further enhances the overall sealing and structural integrity of the door panel.

[0028] The fire-retardant mortar comprises the following components by weight percentage: plant fiber powder mixture (20–65%), magnesium sulfate preparation (5–15%), magnesium oxide (5–15%), magnesium chloride (5–10%), silica gel (5–10%), tourmaline (10–20%), and diatomaceous earth (5–10%). This formulation range optimizes the balance of fire resistance, heat insulation, lightweight, strength, and processability.

[0029] Components not described in detail in this article are existing technologies.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A grouting fireproof door, characterized in that: The system includes a door frame (1), inside which a wooden mounting boss (2) is provided at the position corresponding to the lock head and door closer installation. The thickness of the wooden mounting boss (2) is the same as the thickness of the door frame (1). The door frame (1) is spliced ​​from two vertical joists and two horizontal joists. Inside the door frame (1), two reinforcing beams (3) are fixed parallel to the horizontal joists. The reinforcing beams (3) have fully penetrating through grooves (8). One of the horizontal joists is not flush with the end of the vertical joist and has a grouting groove (7) formed on its end face. The size of the grouting groove (7) is smaller than that of the through groove (8). The horizontal keel with the grouting groove (7) is fastened with an end sealing plate (10) on the outside. One side of the end sealing plate (10) is flush with the ends of the two vertical keels. At least one vertical keel has several exhaust holes (4) on its side wall in the direction of extension. The exhaust holes (4) are tapered structures with a larger inner diameter and a smaller outer diameter. The diameter of the small end of the exhaust holes (4) does not exceed five millimeters. The door frame (1) has a fireproof core board (5) formed inside. The door frame (1) is wrapped with an outer sleeve (6).

2. The grouting fireproof door according to claim 1, characterized in that: The inner wall of the door frame (1) is formed with at least one reinforcing connection groove (9), the depth of the reinforcing connection groove (9) is one to two centimeters, and the wooden mounting boss (2) is fixed to the door frame (1) by means of mortise and tenon structure in the reinforcing connection groove (9).

3. A grouting fireproof door according to claim 1, characterized in that: The fireproof core board (5) is formed by casting, and the thickness of the fireproof core board (5) is the same as the thickness of the door frame (1).

4. A grouting fireproof door according to claim 1, characterized in that: The outer casing (6) can be either thin sheet metal or decorative panel.

5. A grouting fireproof door according to claim 1, characterized in that: A sealing device (11) is installed inside the exhaust hole (4). The sealing device (11) includes a plug cap (13). A spring (12) is fixed to the side of the plug cap (13) facing the small end of the exhaust hole (4). A limit ring (14) is fixed to the side of the large end of the exhaust hole (4). The inner diameter of the limit ring (14) is larger than the outer diameter of the plug cap (13). When the spring (12) naturally extends, one end of the plug cap (13) is attached to the limit ring (14).

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