CN218787076U

CN218787076U - Household fireproof door

Info

Publication number: CN218787076U
Application number: CN202221919262.4U
Authority: CN
Inventors: 叶强
Original assignee: Zhejiang Baihao Door Industry Co ltd
Current assignee: Zhejiang Baihao Door Industry Co ltd
Priority date: 2022-07-21
Filing date: 2022-07-21
Publication date: 2023-04-04
Anticipated expiration: 2032-07-21

Abstract

The utility model relates to a domestic fire door that prevents, include: the sealing cavity is positioned inside the door and is I-shaped; the cam is oval in shape and is rotationally connected into the sealing cavity; the hand wheel is fixedly connected with the cam and is positioned on the outer side of the door; the upper sealing plate is arranged in a T shape; the lower sealing plate is arranged in an inverted T shape; the connecting rod mechanism is connected with the cam, the upper sealing plate and the lower sealing plate; wherein, the upper sealing plate and the lower sealing plate are respectively arranged at the upper side and the lower side of the cam. The cavity of the middle vertical part of the sealed cavity is a sliding track used for limiting the movement track of the lifting plate, the shape of the cam determines the stroke of the lifting plate, the cam is used for realizing the lifting of the lifting plate of the driven part so as to drive the upper transverse plate and the lower transverse plate to reach a target designated position, and the connecting rod mechanism is used for connecting the cam and the sealing plate and mainly used for realizing the retraction of the lower transverse plate.

Description

Household fireproof door

Technical Field

The utility model relates to a prevent fire door technical field, in particular to family expenses prevent fire door.

Background

A fire door is a door that can meet the requirements of fire stability, integrity and thermal insulation for a certain period of time. It is a fire-proof partition with certain fire resistance, which is arranged in fire-proof subareas, evacuation staircases, vertical shafts, etc. Specially used in housing construction keeps apart the fire source, has huge effect to fire control work, in case the conflagration people can obtain the chance of fleing through preventing fire door, prevents that fire door has the effect of ordinary door in addition, more has the effect that prevents the intensity of a fire and spread with the flue gas diffusion, can prevent stretching of the intensity of a fire in a certain time, ensures personnel evacuation.

Among the prior art, the fire door is prevented in the family expenses of the majority, can't play fine leakproofness, separates the cigarette ability poor, and when the conflagration took place, even close the back, harmful gas still can be through the door gap of upper and lower both sides in the room of entering very fast, harm personnel's healthy easily, is difficult to provide sufficient rescue time.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a family expenses prevent fire door to solve above-mentioned technical problem.

The technical scheme of the utility model is realized like this: the sealing cavity is positioned inside the door, the sealing cavity is I-shaped, and the sealing cavity penetrates through the upper side and the lower side of the door; the cam is oval in shape and is rotationally connected in the sealing cavity; the hand wheel is fixedly connected with the cam and is positioned on the outer side of the door; the upper sealing plate is arranged in a T shape; the lower sealing plate is arranged in an inverted T shape; the connecting rod mechanism is connected with the cam, the upper sealing plate and the lower sealing plate; wherein, the upper sealing plate and the lower sealing plate are respectively arranged at the upper side and the lower side of the cam.

By adopting the technical scheme, the sealing cavity is designed into an I shape, the cavity of the middle vertical part is a sliding track used for limiting the motion track of the lifting plate, the motion track of the lifting plate is ensured to be vertical up and down, the sealing performance of the door can be mainly improved by the design in the sealing cavity, the sealing cavity belongs to the middle interlayer of the door, the rotation of the cam is controlled through the rotating hand wheel, the shape of the cam determines the stroke of the lifting plate, the cam is used for realizing the lifting of the lifting plate of the driven piece to drive the upper transverse plate and the lower transverse plate to reach the target designated position, the upper transverse plate and the lower transverse plate can block the door gap, the sealing performance is improved by isolating gas, and the connecting rod mechanism is mainly used for realizing the retraction of the lower transverse plate by connecting the cam and the two sealing plates.

The utility model discloses further set up to: the upper sealing plate comprises an upper transverse plate and an upper lifting plate perpendicular to the middle of the upper transverse plate, the lower sealing plate comprises a lower transverse plate and a lower lifting plate perpendicular to the middle of the lower transverse plate, and the cam is connected with the upper lifting plate and the lower lifting plate through a connecting rod mechanism respectively.

Through adopting above-mentioned technical scheme, two positions diaphragms and the lifter plate of closing plate are respectively for realizing different purposes, and the purpose of diaphragm is blockked up the crack of upper and lower door and is realized sealing, increases the leakproofness, and the purpose of lifter plate is to promote the diaphragm to the assigned position, and the diaphragm is as an organic whole with the lifter plate itself.

The utility model discloses further set up to: the water injection pipe is positioned on one side of the door and is provided with a sealing cover; the water storage cavity is positioned inside the lower transverse plate and communicated with the water injection pipe, and a through hole is formed in the bottom of the water storage cavity and used for draining water; the fireproof water absorption cloth is fixedly arranged on the lower side of the lower transverse plate; the leakage-proof plate is L-shaped and is positioned at the bottom side inside the water storage cavity, and two strip-shaped water drainage holes which are distributed in a bilateral symmetry manner are formed in the leakage-proof plate; the fixed plate is fixedly arranged in the door and is fixedly connected with the leakage-proof plate; the rectangular groove is formed at the junction of the lower lifting plate and the lower transverse plate, and the size and the shape of the rectangular groove correspond to the vertical part of the leakage-proof plate; the strip-shaped hole is communicated with the sealing cavity and one side of the door with the hand wheel, and the water injection pipe moves through the strip-shaped hole; the through holes at the bottom of the water storage cavity and the lower water holes in the leakage-proof plate are distributed in a staggered mode, and the lower transverse plate is provided with an opening through which the fixing plate extends into the water storage cavity and is connected with the vertical part of the leakage-proof plate.

By adopting the technical scheme, the water injection pipe is used for injecting water into the water storage cavity in the downward transverse plate, the water injection pipe is arranged on one side of the door and is used for directly injecting water from the outside of the door, the water injection pipe is also provided with a sealing cover so as to prevent dust from blocking the water injection pipe, and a strip-shaped hole is formed in one side of the door and is used for enabling the water injection pipe to slide in the door along with the lifting of the lifting plate; the water storage cavity plays a role of containing water and is arranged in the lower transverse plate; the center of the bottom in the water storage cavity is also provided with a through hole for leading water in the water storage cavity to flow out, the bottom in the water storage cavity is also provided with a leakage-proof plate, the leakage-proof plate is L-shaped and respectively comprises a vertical part and a horizontal part, the horizontal part is used for closing to the water storage cavity to block the water flow, when the sealing plate is not positioned at the position needing to seal a door gap, the water flow in the water storage cavity is blocked, the shape and the size of the leakage-proof plate are consistent with the size of the bottom of the water storage cavity, the bottom of the leakage-proof plate is also provided with a strip-shaped lower water hole, the position of the strip-shaped lower water hole is staggered with the through hole at the bottom of the water storage cavity, the staggered arrangement is also used for preventing the water in the water storage cavity from flowing out when fire does not occur, the top of the vertical part is connected with a fixing plate, one end of the fixing plate is fixedly arranged in the door, the other end of the leakage-proof plate is connected with the leakage-proof plate, when the lower lifting plate descends, the fixing plate is fixed plate, the position of the fixing plate is fixed plate is separated from the water storage cavity, the sealing plug is pulled out from the lower water hole, the vertical part, the water storage cavity, the fixing plate can enable the water storage cavity to flow in order to realize the relative movement of the water storage cavity, and the water storage cavity, so that the water storage cavity can hold the fixing plate can hold the vertical plate; the fireproof water absorption cloth is used for absorbing water flowing out of the water storage cavity, and the fireproof water absorption cloth soaked with the water can prevent air outside the door from entering the door and improve the sealing performance of the door.

The utility model discloses further set up to: the pin holes are formed in one side of the cam and are respectively close to two ends of the cam, and the pin holes are formed in one ends, close to the cam, of the upper lifting plate and the lower lifting plate; the positioning pin is rotatably connected in the pin hole; a plurality of connecting rods; the positioning pin on the left side of the cam is connected with the positioning pin on the lower lifting plate through a connecting rod, and the positioning pin on the right side of the cam is connected with the positioning pin on the upper lifting plate through a connecting rod.

Through adopting above-mentioned technical scheme, the pinhole is used for installing the locating pin, and the locating pin can just can not fall out in pinhole internal rotation, and connecting rod and locating pin pass through fixed connection, connect the locating pin on cam and the lifter plate respectively, and its aim at can be the lifter plate from the position after the decline reset down.

The utility model discloses further set up to: the groove is positioned at the top of the door frame and corresponds to the upper transverse plate in shape.

Through adopting above-mentioned technical scheme, the recess that the door frame top set up mainly gets into when supplying the last horizontal plate in the sealed chamber to rise, can cut off the gas exchange of door both sides as far as after getting into the recess.

The utility model discloses further set up to: the sliding rail is fixedly arranged on the inner wall matched with the upper lifting plate and the lower lifting plate in the sealing cavity, and rollers are arranged on the inner side of the sliding rail and are in rolling connection with the upper lifting plate and the lower lifting plate; the ball clamping device is arranged on the outer wall of the lower lifting plate and used for limiting the lower sealing plate to automatically fall down due to gravity; and the limiting bulge is arranged in the sealing cavity and is connected with the bead clamping device on the lower lifting plate in a matching manner.

By adopting the technical scheme, the sliding track is arranged, the rollers are arranged on the track, the sliding fluency is increased, the positions of two sides of the lower lifting plate under the side wall of the sealed cavity are provided with the limiting bulges, the limiting bulges are arranged on the side wall of the sealed cavity, the ball clamping devices arranged on two sides of the lower lifting plate are matched with the limiting bulges, the ball clamping devices arranged on two sides of the lower lifting plate are close to the locking mechanism in the Chinese patent CN104691691B, and the technical means is conventional, so the specific structure of the ball clamping devices is not described in detail, the design purpose of the ball clamping devices is that when the lower lifting plate does not fall, the lower lifting plate can slide to the position of a door gap under the action of gravity, and the ball clamping devices can be matched with the limiting bulges to enable the lower lifting plate not to fall under the influence of gravity, so that the limiting effect is achieved.

The utility model discloses further set up to: and the platforms are positioned at two ends of the cam, which are farthest away from the circle center.

By adopting the technical scheme, the two sections of the oval cam, which are farthest away from the circle center, are set as the platforms, so that when the cam pushes the upper cross plate into the groove of the door frame, the upper cross plate cannot return to the lowest position for sealing because the contact surface of the cam and the lifting plate slips, and the contact surface of the upper lifting plate and the cam is a plane instead of a curved surface, so that the plane can enable the upper lifting plate to be in the lifted position more stably after being lifted.

The utility model discloses further set up to: the sealing plug is positioned at the bottom of the water storage cavity and vertically arranged upwards, and the shape, size and position of the sealing plug are distributed to correspond to the drainage hole in the leakage-proof plate.

Through adopting above-mentioned technical scheme, the bottom in water storage chamber still is equipped with the sealing plug, and the sealing plug cooperates with the rectangular form offal hole on the leak protection board, when need not draining, the sealing plug is during stuffing into the offal hole, can prevent the water seepage, has guaranteed the leakproofness in water storage chamber.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.

FIG. 1 is a schematic perspective view of a door according to an embodiment of the present invention;

FIG. 2 is a side cross-sectional view of a midpoint of a door according to an embodiment of the present invention;

FIG. 3 isbase:Sub>A cross-sectional view of an embodiment of the door of the present invention taken along line A-A;

FIG. 4 is a cross-sectional view of a door B-B according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view of a door C according to an embodiment of the present invention;

FIG. 6 is a cross-sectional view of a door and doorframe in accordance with an embodiment of the present invention;

FIG. 7 is a cross-sectional view of a door D-D according to an embodiment of the present invention;

FIG. 8 is a cross-sectional view of an embodiment of the present invention at E-E;

FIG. 9 is a sectional view of an embodiment of the door of the present invention taken along line F-F;

fig. 10 is a perspective partial structure sectional view of the lower cross plate according to the embodiment of the present invention.

Reference numerals: 1. a door; 2. a door frame; 11. sealing the cavity; 12. a cam; 13. a hand wheel; 14. an upper transverse plate; 15. a lower transverse plate; 16. an upper lifting plate; 17. a lower lifting plate; 20. a through hole; 21. a water injection pipe; 22. a water storage cavity; 23. fireproof water-absorbing cloth; 24. a leak-proof plate; 25. a drain hole; 26. a fixing plate; 27. sealing the cover; 28. a rectangular groove; 29. a strip-shaped hole; 31. positioning pins; 32. a connecting rod; 41. a groove; 51. a sliding track; 52. a roller; 53. a bead clamping device; 54. a limiting bulge; 61. a platform; 71. a sealing plug;

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 to 10, the utility model discloses a fireproof door, include: the sealing cavity 11 is positioned inside the door 1, the sealing cavity 11 is I-shaped, and the sealing cavity 11 penetrates through the upper side and the lower side of the door 1; the cam 12 is oval in shape, and the cam 12 is rotationally connected into the sealed cavity 11; the hand wheel 13 is fixedly connected with the cam 12, and the hand wheel 13 is positioned on the outer side of the door 1; the upper sealing plate is arranged in a T shape; the lower sealing plate is arranged in an inverted T shape; a link 32 mechanism, the link 32 mechanism connecting the cam 12 with the upper and lower seal plates; wherein, the upper sealing plate and the lower sealing plate are respectively arranged at the upper side and the lower side of the cam 12. The sealing cavity 11 is designed to be I-shaped, a sliding track 51 is arranged in the middle vertical portion of the sealing cavity 11 and used for limiting the motion track of the lifting plate, the motion track of the lifting plate is ensured to be straight up and straight down, the sealing performance of the door 1 can be mainly improved through the design in the sealing cavity 11, the sealing cavity 11 belongs to a middle interlayer of the door 1, the rotation of a cam 12 is controlled through a rotating hand wheel 13, the shape of the cam 12 determines the stroke of the lifting plate, the cam 12 is used for achieving the lifting of a driven piece lifting plate to drive an upper transverse plate 14 and a lower transverse plate 15 to reach a target designated position, the gap between the door 1 can be blocked by the upper transverse plate 14 and the lower transverse plate 15, the sealing performance is improved through air isolation, and the connecting rod 32 mechanism connects the cam 12 and two sealing plates and is mainly used for achieving the withdrawing of the lower transverse plate 15.

In the embodiment of the present invention, the upper sealing plate includes an upper horizontal plate 14 and an upper lifting plate 16 perpendicular to the middle of the upper horizontal plate 14, the lower sealing plate includes a lower horizontal plate 15 and a lower lifting plate 17 perpendicular to the middle of the lower horizontal plate 15, and the cam 12 is connected to the upper lifting plate 16 and the lower lifting plate 17 through a link mechanism respectively; the transverse plates and the lifting plates are arranged at two parts of the sealing plate respectively for realizing different purposes, the transverse plates are used for blocking up upper and lower door seams to realize sealing, the lifting plates are used for pushing the transverse plates to an appointed position, and the transverse plates and the lifting plates are integrated.

In the embodiment of the present invention, the water injection pipe 21 is located at one side of the door 1 and has a sealing cover 27; the water storage cavity 22 is positioned inside the lower transverse plate 15, the water storage cavity 22 is communicated with the water injection pipe 21, and the bottom of the water storage cavity 22 is provided with a through hole 20 for draining water; the fireproof water absorption cloth 23 is fixedly arranged on the lower side of the lower transverse plate 15; the leakage-proof plate 24 is L-shaped and is positioned at the bottom side inside the water storage cavity 22, and two strip-shaped water drainage holes 25 which are distributed in bilateral symmetry are arranged on the leakage-proof plate 24; the fixing plate 26 is fixedly arranged in the door 1 and fixedly connected with the leakage-proof plate 24; the rectangular groove 28 is formed at the junction of the lower lifting plate 17 and the lower transverse plate 15, and the size and the shape of the rectangular groove 28 correspond to the vertical part of the leakage-proof plate 24; the strip-shaped hole 29 is communicated with the sealing cavity 11 and one side of the door 1 with the hand wheel 13, and the strip-shaped hole 29 is used for the water injection pipe 21 to move; the through holes 20 at the bottom of the water storage cavity 22 and the lower water holes 25 in the leakage-proof plate 24 are distributed in a staggered manner, and the lower transverse plate 15 is provided with an opening for the fixing plate 26 to extend into the water storage cavity 22 and be connected with the vertical part of the leakage-proof plate 24. The water injection pipe 21 is used for injecting water into the water storage cavity 22 in the downward transverse plate 15, the water injection pipe 21 is arranged on one side of the door 1 and is used for directly injecting water from the outside of the door 1, the water injection pipe 21 is also provided with a sealing cover 27 for preventing dust from blocking the water injection pipe 21, and a strip-shaped hole 29 is formed in one side of the door 1 and is used for enabling the water injection pipe 21 to slide in the door 1 along with the lifting of the lifting plate; the water storage cavity 22 is used for containing water and is arranged in the lower transverse plate 15; the center of the bottom in the water storage cavity 22 is also provided with a through hole 20 for enabling water in the water storage cavity 22 to flow out, the bottom in the water storage cavity 22 is also provided with a leakage-proof plate 24, the leakage-proof plate 24 is L-shaped and respectively comprises a vertical part and a horizontal part, the horizontal part is used for closing to the water storage cavity 22 to block water flow, when the sealing plate is not positioned at the position needing the seam of the sealing door 1, the water flow in the sealing plate is blocked, the shape and the size of the sealing plate are consistent with the size of the bottom of the water storage cavity 22, the bottom of the leakage-proof plate 24 is also provided with a strip-shaped water outlet hole 25, the position of the strip-shaped water outlet hole 25 is staggered with the through hole 20 at the bottom of the water storage cavity 22, and the staggered arrangement is also used for preventing the water in the water storage cavity 22 from flowing out when fire does not occur, the top of the vertical part is connected with a fixed plate 26, one end of the fixed plate 26 is fixedly arranged in the door 1, and a rectangular groove 28 is arranged at the junction of the lower lifting plate 17 and the lower transverse plate 15 and is positioned above the fixed plate 26, so that the purpose is that as one end of the fixed plate 26 is fixedly arranged in the door 1, and the other end of the fixed plate is connected with a leakage-proof plate 24, when the lower lifting plate 17 descends, the position of the fixed plate 26 is fixed, the leakage-proof plate 24 is separated from the water storage cavity 22, and the sealing plug 71 is pulled out of the lower water hole 25, so that the water in the water storage cavity 22 flows, and in order to realize the relative movement of the water storage cavity 22 and the leakage-proof plate 24, a groove capable of accommodating the vertical part of the leakage-proof plate 24 and the fixed plate 26 is arranged on the surface of the lower lifting plate 17; the fireproof water absorption cloth 23 is used for absorbing water flowing out of the water storage cavity 22, and the fireproof water absorption cloth 23 soaked with the water can prevent air outside the door 1 from entering the door 1 and improve the sealing performance of the door 1.

In the embodiment of the present invention, the pin holes are provided at one side of the cam 12 and respectively near both ends, and the pin holes are provided at one end of the upper lifting plate 16 and the lower lifting plate 17 near the cam 12; the positioning pin 31 is rotatably connected in the pin hole; a plurality of links 32, the links 32 being provided; the positioning pin 31 on the left side of the cam 12 is connected with the positioning pin 31 on the lower lifting plate 17 through a connecting rod 32, and the positioning pin 31 on the right side of the cam 12 is connected with the positioning pin 31 on the upper lifting plate 16 through the connecting rod 32. The pin hole is used for installing the positioning pin 31, the positioning pin 31 can rotate in the pin hole and cannot fall out, the connecting rod 32 is fixedly connected with the positioning pin 31 and is respectively connected with the cam 12 and the positioning pin 31 on the lifting plate, and the aim is to reset the lower lifting plate 17 from the lowered position.

In the embodiment of the present invention, the groove 41 is located at the top of the door 1 frame, and the shape of the groove 41 corresponds to the upper horizontal plate 14. The groove 41 arranged on the top of the door 1 frame is mainly used for the upper transverse plate 14 in the sealing cavity 11 to enter when ascending, and the gas exchange on the two sides of the door 1 can be blocked as much as possible after entering the groove 41.

In the embodiment of the present invention, the sliding rail 51 is fixedly disposed on the inner wall of the sealed cavity 11, which is matched with the upper lifting plate 16 and the lower lifting plate 17, and the inner side of the sliding rail 51 is provided with a roller 52 and is in rolling connection with the upper lifting plate 16 and the lower lifting plate 17; the bead clamping device 53 is arranged on the outer wall of the lower lifting plate 17 and used for limiting the lower sealing plate to automatically fall due to gravity; and the limiting protrusion 54 is arranged in the sealing cavity 11, and is in fit connection with the bead clamping device 53 on the lower lifting plate 17. The sliding rail 51 is provided with the roller 52, so as to increase the smoothness of sliding, the limiting protrusions 54 are provided at the positions of two sides of the lower lifting plate 17 on the side wall of the sealed cavity 11, the limiting protrusions 54 are provided on the side wall of the sealed cavity 11, and the ball clamping devices 53 and the limiting protrusions 54 are provided on two sides of the lower lifting plate 17 to be matched with each other, the ball clamping devices 53 at two sides of the lower lifting plate 17 are close to the locking mechanism in the chinese patent CN104691691B and belong to the conventional technical means, so the specific structure of the ball clamping devices 53 is not described in detail, the ball clamping devices 53 are designed to aim at that when the lower lifting plate 17 does not descend, the lower lifting plate 17 may slide to the position of the door 1 seam due to the effect of gravity, and when the lower lifting plate 17 does not descend, the ball clamping devices 53 and the limiting protrusions 54 are matched to enable the lower lifting plate 17 to not to fall due to the effect of gravity.

In the embodiment of the present invention, the platform 61 is located at the two ends of the cam 12 farthest from the center of the circle. The two sections of the elliptical cam 12 farthest from the center of circle are set as the platforms 61, so that when the cam 12 pushes the horizontal plate 14 into the groove 41 of the door 1, the horizontal plate will not return to the lowest position and cannot perform a sealing function because the contact surface between the cam 12 and the lifting plate 16 slips, and because the contact surface between the lifting plate 16 and the cam 12 is a plane rather than a curved surface, the plane can make the lifting plate 16 in a lifted position more stable after being lifted.

In the embodiment of the present invention, the sealing plug 71 is located at the bottom of the water storage cavity 22 and is vertically disposed upward, and the shape, size and position distribution of the sealing plug 71 correspond to the lower water hole 25 on the leakage-proof plate 24. The bottom of the water storage cavity 22 is also provided with a sealing plug 71, the sealing plug 71 is matched with the strip-shaped water drainage hole 25 on the leakage-proof plate 24, when water does not need to be drained, the sealing plug 71 is plugged into the water drainage hole 25, water leakage can be prevented, and the sealing performance of the water storage cavity 22 is guaranteed.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A fire door for domestic use, comprising a door (1) and a frame (2), characterized in that said door (1) comprises:

the sealing cavity (11) is positioned inside the door (1), the sealing cavity (11) is I-shaped, and the sealing cavity (11) penetrates through the upper side and the lower side of the door (1);

a cam (12), the cam (12) being oval in shape, the cam (12) being rotatably connected in the sealed chamber (11);

the hand wheel (13), the said hand wheel (13) is fixedly connected with cam (12), the said hand wheel (13) locates at the outside of the door (1);

the upper sealing plate is arranged in a T shape;

the lower sealing plate is arranged in an inverted T shape;

a link mechanism connecting the cam (12) with the upper and lower seal plates;

wherein, the upper sealing plate and the lower sealing plate are respectively arranged at the upper side and the lower side of the cam (12).

2. A fire door for homes according to claim 1, characterized in that the upper sealing plate comprises an upper cross plate (14) and an upper lifting plate (16) perpendicular to the middle of the upper cross plate (14), the lower sealing plate comprises a lower cross plate (15) and a lower lifting plate (17) perpendicular to the middle of the lower cross plate (15), the cam (12) is connected to the upper lifting plate (16) and the lower lifting plate (17) respectively by a link mechanism.

3. A fire rated door for home use as claimed in claim 2, wherein said lower sealing plate comprises:

the water injection pipe (21), the said water injection pipe (21) locates at one side of the door (1) and has closing caps (27);

the water storage cavity (22) is positioned inside the lower transverse plate (15), the water storage cavity (22) is communicated with the water injection pipe (21), and the bottom of the water storage cavity is provided with a through hole (20) for water to enter;

the fireproof water absorption cloth (23) is fixedly arranged on the lower side of the lower transverse plate (15);

the anti-leakage plate (24) is L-shaped and is positioned at the bottom side inside the water storage cavity (22), and two strip-shaped water drainage holes (25) which are distributed in a bilateral symmetry mode are formed in the horizontal part of the anti-leakage plate (24);

the fixing plate (26), the said fixing plate (26) is fixed in door (1) and fixedly connected with leak-proof plate (24);

the rectangular groove (28) is formed in the junction of the lower lifting plate (17) and the lower transverse plate (15), and the size and the shape of the rectangular groove (28) correspond to the vertical part of the leakage-proof plate (24);

the strip-shaped hole (29) is communicated with the sealing cavity (11) and one side of the door (1) with the hand wheel (13), and the strip-shaped hole (29) is used for the water injection pipe (21) to move;

the through holes (20) at the bottom of the water storage cavity (22) and the lower water holes (25) in the leakage-proof plate (24) are distributed in a staggered mode, and the lower transverse plate (15) is provided with an opening through which the fixing plate (26) extends into the water storage cavity (22) and is connected with the vertical part of the leakage-proof plate (24).

4. A fire rated home door as claimed in claim 2, wherein the linkage further comprises:

the pin holes are formed in one side of the cam (12) and are respectively close to two ends of the cam, and the pin holes are formed in one ends, close to the cam (12), of the upper lifting plate (16) and the lower lifting plate (17);

the positioning pin (31), the positioning pin (31) is rotatably connected in the pin hole;

a plurality of links (32), the links (32) being provided;

the positioning pin (31) on the left side of the cam (12) is connected with the positioning pin (31) on the lower lifting plate (17) through a connecting rod (32), and the positioning pin (31) on the right side of the cam (12) is connected with the positioning pin (31) on the upper lifting plate (16) through the connecting rod (32).

5. A fire door for domestic use according to claim 2, characterised in that said frame (2) further comprises:

the groove (41), the groove (41) is located on the top of the door frame (2), and the shape of the groove (41) corresponds to that of the upper transverse plate (14).

6. A fire rated home door as claimed in claim 1, further comprising:

the sliding rail (51) is fixedly arranged on the inner wall, matched with the upper lifting plate (16) and the lower lifting plate (17), in the sealed cavity (11), and rollers (52) are arranged on the inner side of the sliding rail (51) and are in rolling connection with the upper lifting plate (16) and the lower lifting plate (17);

the bead clamping device (53) is arranged on the outer wall of the lower lifting plate (17) and used for limiting the lower sealing plate to automatically fall down due to gravity;

and the limiting protrusion (54) is arranged in the sealing cavity (11) and is connected with the bead clamping device (53) on the lower lifting plate (17) in a matching manner.

7. A fire door for domestic use according to claim 1, characterised in that said cam (12) further comprises:

the platform (61), platform (61) are located cam (12) and are apart from the both ends of centre of a circle farthest away.

8. A fire rated home door according to claim 2, characterized in that the down-board (15) further comprises:

the sealing plug (71) is positioned at the bottom of the water storage cavity (22) and vertically arranged upwards, and the shape, size and position distribution of the sealing plug (71) correspond to the water drainage holes (25) in the leakage-proof plate (24).