Fireproof door of fire fighting access

Abstract

The utility model relates to the technical field of fireproof doors, in particular to a fire fighting access fireproof door which comprises a door frame, a door leaf, a protection plate and an inner framework, a through groove penetrating front and back is formed in the door leaf, the inner wall of the through groove protrudes outwards towards the center of the through groove to form a protruding part, and a fixing assembly used for fixing the protection plate is arranged on the protruding part; when the surface of the fireproof door is damaged, the damaged surface of the fireproof door can be replaced by removing fixation of the protection plate by the fixing assembly and disassembling and replacing the protection plate, so that the fireproof performance of the fireproof door can be guaranteed without disassembling and replacing the whole door leaf, the workload of workers is reduced, meanwhile, waste of resources is avoided, and the fireproof door is convenient to use. The protection plate can be conveniently positioned and installed through the protruding part, the shape of the protection plate is matched with that of the through groove, a fireproof sealing strip is installed on the outer edge of the protection plate, it is ensured that effective sealing can be achieved in the fire disaster, and smoke and flames are prevented from permeating into a fire fighting access.

Description

Technical Field

[0001] The utility model relates to the technical field of fireproof doors, in particular to a fireproof door for a fire-fighting passage. Background Art

[0002] A fire door is a door that can meet the requirements of fire resistance, stability, integrity and thermal insulation within a certain period of time. It can achieve fire separation in the event of a fire and is an indispensable fire protection configuration in modern buildings.

[0003] The door leaves of existing fire passage fire doors are mostly formed by bending a whole piece of steel plate. The fire doors are normally closed after installation. When transporting some larger objects that cannot be transported by elevators through the fire passage, the fire doors are easily damaged by collision with the objects, thereby reducing their fire resistance. When a part of the door leaf is damaged, the entire door leaf needs to be replaced, which requires a large workload and causes a waste of resources. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a fire door for a fire passage, so as to solve the technical problem that the door leaves of existing fire doors for fire passages in the prior art are mostly formed by bending a whole steel plate directly, and when a part of the door leaf is damaged, the entire door leaf needs to be replaced, the replacement workload is large and causes a waste of resources.

[0005] The utility model is realized by the following technical solutions:

[0006] A fireproof door for a fire passage, comprising a door frame and a door leaf hingedly mounted on the door frame, wherein the door leaf is provided with a through slot running through the front and rear, and openings at both ends of the through slot are detachably connected with protective plates;

[0007] A filling space is formed between the two protection plates and the door frame, and an inner frame is fixedly connected to the filling space;

[0008] The inner wall of the through slot protrudes outward toward the center of the through slot to form a raised portion, the outer shape of the protective plate matches the through slot, and a fixing component for fixing the protective plate is arranged on the raised portion.

[0009] Furthermore, the side surfaces of the protective plate facing the protruding portion are provided with fixing holes, and the end surfaces of the protruding portion facing the fixing holes are provided with through holes;

[0010] The fixing assembly comprises two latches which are slidably connected to the through holes at intervals, and the protruding portion is provided with a driving mechanism for simultaneously driving the two latches to slide and extend into the two fixing holes respectively.

[0011] Furthermore, the driving mechanism includes a screw rotatably connected to the through hole, both ends of the screw respectively extend into the latch and are threadedly connected to the latch; a worm gear is fixedly connected to the circumferential surface of the screw, a worm is rotatably connected to the door leaf, and the worm is meshed with the worm gear.

[0012] Furthermore, the driving mechanism also includes a knob fixedly connected to the end of the worm, and the knob is used to rotate the worm.

[0013] Furthermore, an end surface of the knob away from the worm is flush with the surface of the door leaf, and a groove is provided on the end surface of the knob.

[0014] Furthermore, a sleeve is sleeved on the circumferential surface of the latch, and a spring is arranged between the bottom wall of the sleeve and the latch.

[0015] Furthermore, an inclined surface is formed at one end of the sleeve away from the latch.

[0016] Furthermore, a limiting block is fixedly connected to the outer circumferential surface of the sleeve, and a limiting groove which is slidably matched with the limiting block is provided on the inner wall of the through hole.

[0017] The beneficial effects of the utility model are:

[0018] The fireproof door of the fire passage, when the surface of the fireproof door of the utility model is damaged, the fixing of the protective plate by the fixing assembly is released, and the protective plate is disassembled and replaced, so that the damaged surface of the fireproof door can be replaced, thereby ensuring the fireproof performance of the fireproof door without disassembling and replacing the entire door leaf, reducing the workload of the staff and avoiding the waste of resources, and the raised portion is conducive to the positioning and installation of the protective plate, the shape of the protective plate is consistent with the through groove, and a fireproof sealing strip is installed at the outer edge of the protective plate to ensure effective sealing in case of fire to prevent smoke and flames from penetrating into the fire passage.

[0019] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The utility model is a schematic diagram of the structure of the fire-proof door of the fire-fighting passage.

[0021] Figure 2 The utility model is a schematic diagram of the connection between the inner frame and the door leaf of the fire-proof door of the fire passage.

[0022] Figure 3 The utility model is a schematic diagram of the connection between the sleeve and the limit block of the fire door of the fire passage.

[0023] Figure 4 The utility model is a connection diagram of the sleeve, spring and latch of the fire-proof door of the fire passage.

[0024] In the figure: 1-door frame, 2-door leaf, 3-through groove, 4-protective plate, 5-filling space, 6-inner frame, 7-protrusion, 8-fixing hole, 9-through hole, 10-latch, 11-screw, 12-worm gear, 13-worm, 14-knob, 15-groove, 16-sleeve, 17-spring, 18-inclined surface, 19-limiting block, 20-limiting groove. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] In the above description of the utility model, it should be noted that the orientation or position relationship indicated by the terms "one side", "the other side", etc. is based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0029] In addition, the term "same" does not mean that the mechanisms must be absolutely identical, but slight differences are allowed. The term "vertical" simply means that the positional relationship between the mechanisms is more vertical than "parallel", and does not mean that the structure must be completely vertical, but can be slightly tilted.

[0030] See also Figures 1 to 3 The utility model provides a technical solution: a fireproof door for a fire passage, comprising a door frame 1 and a door leaf 2 hingedly installed in the door frame 1, the door leaf 2 is provided with a through slot 3 running through the front and back, and the openings at both ends of the through slot 3 are detachably connected with protective plates 4, and the protective plates 4 are steel plates;

[0031] A filling space 5 is formed between the two protection plates 4 and the door frame 1, and an inner frame 6 is fixedly connected to the filling space 5. A fireproof perlite board is installed on the inner frame 6 to ensure the fireproof and heat-insulating performance of the fireproof door.

[0032] The inner wall of the through slot 3 bulges outward toward the center of the through slot 3 to form a raised portion 7 . The outer shape of the protective plate 4 matches the through slot 3 , and a fixing component for fixing the protective plate 4 is disposed on the raised portion 7 .

[0033] When the surface of the fire door of the utility model is damaged, the fixing assembly to the protective plate 4 is released, and the protective plate 4 is disassembled and replaced, so that the damaged surface of the fire door can be replaced, thereby ensuring the fireproof performance of the fire door without disassembling and replacing the entire door leaf, reducing the workload of the staff and avoiding the waste of resources. The raised portion 7 is conducive to positioning and installing the protective plate 4, and the shape of the protective plate 4 is consistent with the through groove 3. A fireproof sealing strip is installed at the outer edge of the protective plate 4 to ensure effective sealing in case of fire to prevent smoke and flames from penetrating into the fire passage.

[0034] See also Figures 2 to 4 In this embodiment, the side of the protective plate 4 facing the protrusion 7 is provided with a fixing hole 8, and the end surface of the protrusion 7 facing the fixing hole 8 is provided with a through hole 9;

[0035] The fixing assembly includes two latch pins 10 slidably connected to the through holes 9 at intervals, and the protruding portion 7 is provided with a driving mechanism for simultaneously driving the two latch pins 10 to slide into the two fixing holes 8 respectively.

[0036] The driving mechanism includes a screw rod 11 rotatably connected to the through hole 9, the screw rod 11 is a bidirectional threaded rod, both ends of the screw rod 11 respectively extend into the latch pin 10 and are threadedly connected to the latch pin 10, the circumferential surface of the latch pin 10 is provided with a friction ring (not shown) for increasing the friction between the latch pin 10 and the through hole 9 to prevent the latch pin 10 from rotating circumferentially; a worm wheel 12 is fixedly connected to the circumferential surface of the screw rod 11, and a worm 13 is rotatably connected to the door leaf 2, and the worm 13 is meshed with the worm wheel 12.

[0037] In this solution, when the protective plate 4 is installed in the through groove 3, the rear surface of the protective plate 4 contacts the inner frame 6. At this time, rotating the worm 13 drives the worm wheel 12 to rotate, and the rotation of the worm wheel 12 drives the screw 11 to rotate. When the screw 11 rotates, it drives the two pins 10 to slide out from the two ends of the through hole 9 and extend into the fixing hole 8, so that the protective plate 4 can be quickly fixed in the through groove 3, and the worm wheel 12 and the worm 13 have a self-locking function, which can effectively prevent the protective plate 4 from loosening.

[0038] See also Figure 1 and Figure 2 In this embodiment, the driving mechanism further includes a knob 14 fixedly connected to the end of the worm 13 , and the knob 14 is used to rotate the worm 13 .

[0039] The end surface of the knob 14 away from the worm 13 is flush with the surface of the door leaf 2 , and a groove 15 is formed on the end surface of the knob 14 .

[0040] In the present solution, the knob 14 facilitates the smooth rotation of the worm 13, and the knob 14 is hidden in the door leaf 2 to make the appearance of the door leaf 2 more beautiful. The groove 15 is hexagonal and a tool is used to cooperate with the knob 14, so that the worm 13 can be rotated more conveniently to drive the worm wheel 12 to rotate and fix the protective plate 4.

[0041] See also Figure 3 and Figure 4 In this embodiment, a sleeve 16 is mounted on the circumferential surface of the latch 10 , and a spring 17 is provided between the bottom wall of the sleeve 16 and the latch 10 .

[0042] The end of the sleeve 16 away from the latch 10 is provided with a bevel 18 , and the end of the sleeve 16 away from the latch 10 is similar to a flat-blade sharpener.

[0043] In this solution, in the initial state, one end of the sleeve 16 away from the latch 10 extends out of the through hole 9, so that the inclined surface 18 is exposed. When the protective plate 4 is installed in the through groove 3, the protective plate 4 first contacts the inclined surface 18, and then the sleeve 16 is squeezed by the inclined surface 18. The sleeve 16 is pressed to slide relative to the latch 10 and squeeze the spring 17. When the fixing hole 8 is aligned with the through hole 9, the sleeve 16 is pushed into the fixing hole 8 under the force generated by the deformation of the spring 17 to restore its original shape, thereby pre-fixing the protective plate 4, which is conducive to the rapid installation of the protective plate 4. Then, the worm 13 is rotated to drive the latch 10 to extend into the fixing hole 8 to further fix the protective plate 4.

[0044] See also Figure 3 and Figure 4 In this embodiment, a limiting block 19 is fixedly connected to the outer circumferential surface of the sleeve 16 , and a limiting groove 20 that slidably cooperates with the limiting block 19 is opened on the inner wall of the through hole 9 .

[0045] In the present solution, the circumferential position of the sleeve 16 can be limited by the cooperation between the limit block 19 and the limit groove 20 to prevent the sleeve 16 from rotating, which is beneficial for the protective plate 4 to be fixed or released by squeezing the sleeve 16 through the inclined surface 18 during installation or disassembly, and can further limit the circumferential rotation of the latch 10, which is beneficial for smoothly driving the screw 11 to extend into the fixing hole 8 for fixation when the screw 11 is rotated.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A fireproof door for a fire escape passage, comprising a door frame (1) and a door leaf (2) hingedly mounted in the door frame (1), characterized in that: The door leaf (2) is provided with a through slot (3) penetrating from front to back, and openings at both ends of the through slot (3) are respectively detachably connected with protective plates (4); A filling space (5) is formed between the two protection plates (4) and the door frame (1), and an inner frame (6) is fixedly connected to the filling space (5); The inner wall of the through groove (3) protrudes outwards toward the center of the through groove (3) to form a raised portion (7); the outer shape of the protective plate (4) matches the through groove (3), and a fixing component for fixing the protective plate (4) is provided on the raised portion (7); The side surfaces of the protective plate (4) facing the protruding portion (7) are provided with fixing holes (8), and the end surfaces of the protruding portion (7) facing the fixing holes (8) are provided with through holes (9); The fixing assembly comprises two latch pins (10) which are slidably connected to the through holes (9) at intervals, and the protruding portion (7) is provided with a driving mechanism for simultaneously driving the two latch pins (10) to slide and extend into the two fixing holes (8) respectively; The driving mechanism comprises a screw (11) rotatably connected to the through hole (9), the two ends of the screw (11) respectively extending into the latch (10) and being threadedly connected to the latch (10); a worm wheel (12) is fixedly connected to the circumferential surface of the screw (11), a worm (13) is rotatably connected to the door leaf (2), and the worm (13) is meshed with the worm wheel (12); A sleeve (16) is sleeved on the circumferential surface of the latch (10), and a spring (17) is arranged between the bottom wall of the sleeve (16) and the latch (10); An inclined surface (18) is formed at one end of the sleeve (16) away from the latch (10).

2. The fire door for fire escape according to claim 1, characterized in that: The driving mechanism further comprises a knob (14) fixedly connected to the end of the worm (13), and the knob (14) is used to rotate the worm (13).

3. The fire door for fire escape according to claim 2, characterized in that: An end surface of the knob (14) away from the worm (13) is flush with the surface of the door leaf (2), and a groove (15) is provided on the end surface of the knob (14).

4. The fire door for fire escape according to claim 1, characterized in that: A limiting block (19) is fixedly connected to the outer circumferential surface of the sleeve (16), and a limiting groove (20) which is slidably matched with the limiting block (19) is provided on the inner wall of the through hole.

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