A type of earthquake-resistant and deformation-resistant fire door

Abstract

The present invention relates to the technical field of fire doors, and specifically to an earthquake-resistant and deformation-resistant fire door; it comprises a door frame and a door body hinged to the inner edge of the door frame by hinges; the door body is closed to the door frame by a door closer; an upper damping groove is arranged on the top surface of the door body; the number of the upper damping grooves is at least two; a plurality of the upper damping grooves are distributed along the width of the door body; the upper damping groove is movably connected to an upper damping block; the lower end of the upper damping block is connected to the bottom of the upper damping groove by a first spring; the present invention arranges an upper damping block and a first spring capable of unloading force on the top of the door body, so that the door body can be closed at a lower speed. Compared with the original method of directly closing the door with a door closer, the impact on the door body during closing is reduced, thereby reducing the degree of deformation of the fire door due to vibration, and improving the service life of the fire door.

Description

Technical Field

[0001] The invention relates to the technical field of fireproof doors, in particular to an earthquake-resistant and deformation-resistant fireproof door. Background Art

[0002] Fire doors refer to doors that can meet the requirements of fire resistance stability, integrity and thermal insulation within a certain period of time. Through the use of fire doors, the spread of fire can be blocked to a certain extent and for a certain period of time. When using existing fire doors, the shape of the fire doors will be deformed under the burning of flames or under strong vibrations, causing misalignment and abutment between fire doors, affecting their normal opening and closing. However, fire doors are usually pressed and have no internal support mechanism to prevent deformation. In order to solve the above problems, we have previously proposed a technology with a publication number of CN218542052U and a patent name of earthquake-resistant and anti-deformation fire doors. This technology supports the door body by setting a support structure inside the door body, thereby improving the strength of the fire door and reducing the deformation of the fire door during use.

[0003] Although this technology can improve the strength of fire doors to a certain extent, it is found through the actual use of fire doors that the main reason for the deformation of fire doors is strong vibration. Through actual visits and investigations, we found that normally closed fire doors are generally used in conjunction with door closers. Due to their own characteristics, fire doors are generally large in size and mass. Therefore, ordinary door closers have a small closing force and cannot drive the heavy fire doors to close. The existing closers generally have a large closing force, so that the fire doors can close and buckle themselves after opening. Because the closing force of the closer is large, the fire door will complete the closing action with a large force every time it is opened. The fire door will generate large noise and impact during the closing process. The source of deformation caused by vibration damage to the fire door generally comes from the impact generated during closing. The method of simply setting a buffer rubber on the door frame to buffer the door body has little effect; and the method of reducing the closing force of the door closer will make it difficult for the fire door to complete the closing action under a small closing force. If a fire occurs, it will lose the smoke isolation and fire prevention effects. Summary of the invention

[0004] In order to make up for the deficiencies of the prior art, the present invention proposes a shock-resistant and deformation-resistant fire door. The present invention arranges an upper damping block and a first spring capable of unloading force at the top of the door body, so that the door body can be closed at a lower speed. Compared with the original method of directly closing the door with a door closer, the impact on the door body during closing is reduced, thereby reducing the degree of deformation of the fire door due to vibration and improving the service life of the fire door.

[0005] The technical solution adopted by the present invention to solve its technical problems is: the earthquake-resistant and deformation-proof fire door described in the present invention includes a door frame and a door body hinged by hinges on the inner edge of the door frame; the door body is closed to the door frame by a door closer; an upper damping groove is arranged on the top surface of the door body; the number of the upper damping grooves is at least two; a plurality of the upper damping grooves are distributed along the width of the door body; the upper damping groove is movably connected to an upper damping block; the lower end of the upper damping block is connected to the bottom of the upper damping groove by a first spring; a guide surface is obliquely arranged on the upper end of the upper damping block; the guide surface can be squeezed by the door frame during the process of closing the door body around the hinge; the guide surface at the upper end of the upper damping block can be retracted into the upper damping groove by being squeezed by the door frame.

[0006] Preferably, the cross-sections of the upper damping groove and the upper damping block are both circular; the guide surface of the upper damping block close to the upper end can be retracted into the corresponding upper damping groove and rotated at the same time during the contact process with the door frame.

[0007] Preferably, the upper damping block is movably sealed to the inner wall of the upper damping groove; a first air hole is provided at the bottom of the upper damping groove; the first air hole is connected to the outside air at the lower end; and air resistance can be formed in the process of the upper damping block being squeezed back into the upper damping groove by the door frame.

[0008] Preferably, a lower damping groove is provided on the bottom surface of the door body; the lower damping groove is slidingly sealed and connected to the lower damping block; the upper surface of the lower damping block and the upper groove wall of the lower damping groove are connected by a tension spring; the upper groove wall of the lower damping groove and the lower groove wall of the upper damping groove are connected by a first air hole.

[0009] Preferably, the lower damping block is provided with second air holes running through it from top to bottom; the aperture of the second air hole is smaller than the aperture of the first air hole; and the lower surface of the lower damping block is parallel to the ground.

[0010] Preferably, a one-way air outlet valve is provided in the second air hole; the bottom of the upper damping groove is connected to the outer wall of the door body through an L-shaped one-way air inlet hole; a plurality of the one-way air inlet holes pass through and are provided with a rotating groove at the corner; the length direction of the rotating groove is consistent with the width direction of the door body; the rotating groove disconnects the two ends of the plurality of one-way air inlet holes; the rotating seal in the rotating groove is connected to a rotating rod; a spiral groove is provided on the outer wall of the rotating rod; the number of spiral turns corresponding to the spiral groove is one turn; the spiral groove on the outer wall of the rotating rod can ensure that the two ends of at least one of the one-way air inlet holes are connected.

[0011] Preferably, a starting groove is provided on the top surface of the door body; the starting groove is slidably connected to the starting strip; the starting groove is exposed at the upper end of the starting strip and a first starting surface is obliquely provided; the lower end of the starting strip is connected to the bottom of the starting groove by a second spring; the middle position of the starting groove is connected to the end of the rotating groove; the end of the rotating rod is fixedly connected to the gear; the gear is meshed with the one-way teeth on the starting strip; a tooth groove is provided on the side of the starting strip close to the gear; the one-way teeth are slidably connected in the tooth groove; the one-way teeth are connected to the bottom of the tooth groove through a third spring; the one-way teeth are obliquely provided with a second starting surface upwardly; the second starting surface on the one-way teeth can be retracted into the tooth groove for avoidance under the pressure of the gear; the one-way teeth can mesh with the gear for transmission during the downward movement of the starting strip.

[0012] Preferably, a countersunk threaded hole is provided on one side of the door body away from the hinge; a bolt is connected to the inner thread of the threaded hole; the threaded hole is connected to the start groove; a lock hole is provided on one side of the start bar close to the threaded hole; the lock hole is aligned with the threaded hole after the start bar moves downward, and the bolt can enter the lock hole.

[0013] Preferably, the start slot is located on the top surface of the door body and is arranged away from the hinge direction; the start strip can extend from the start slot when the door body is moved out of the door frame.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. The present invention arranges an upper damping block and a first spring capable of unloading force at the top of the door body, so that the door body can be closed at a lower speed. Compared with the original method of directly closing the door using a door closer, the impact on the door body during closing is reduced, thereby reducing the degree of deformation of the fire door due to vibration and increasing the service life of the fire door.

[0016] 2. In the present invention, the lower damping block moves downward at its lower end and rests against the ground, and a friction resistance is formed between the lower end of the lower damping block and the ground. The lower damping block is located directly below the corresponding upper damping block, so that unloading force can be formed on the top and bottom of the door body, thereby improving the unloading effect of the door body during the closing process and avoiding deformation of the door body caused by buffering at a single position of the door body.

[0017] 3. In the present invention, since the activated upper damping block changes its position each time the door is closed, the position where the upper damping block on the door is activated is changed, thereby avoiding deformation of the door caused by impact at the same position, making the top or bottom of the door body more evenly stressed in the width direction of the door body, further reducing deformation of the door body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings and implementation modes.

[0019] Figure 1 is a stereogram of the present invention;

[0020] Figure 2 yes Figure 1 A three-dimensional image from another angle;

[0021] Figure 3 is a front cross-sectional view of the door body of the present invention;

[0022] Figure 4 yes Figure 3 The enlarged view of point A in the middle;

[0023] Figure 5 is a side sectional view of the door body of the present invention;

[0024] Figure 6 yes Figure 5 The enlarged view of point B in the middle;

[0025] Figure 7 It is a cross-sectional view of the position of the door body starting groove in the present invention;

[0026] Figure 8 yes Figure 7 Enlarged view of point C in the middle;

[0027] Fig. 9 It is a three-dimensional diagram of the cooperation between the one-way tooth and the gear in the present invention.

[0028] In the figure: door frame 1, hinge 11, door closer 12, door body 2, upper damping groove 21, first air hole 22, lower damping groove 23, one-way air inlet hole 24, rotating groove 25, starting groove 26, threaded hole 27, bolt 28, upper damping block 3, first spring 31, guide surface 32, lower damping block 4, tension spring 41, second air hole 42, rotating rod 5, spiral groove 51, gear 52, starting strip 6, first starting surface 61, second spring 62, one-way tooth 63, second starting surface 631, tooth groove 64, third spring 65, lock hole 66. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0030] like Figures 1 to 9 As shown, the present invention includes the following embodiments:

[0031] Embodiment 1:

[0032] A seismic and deformation-proof fire door comprises a door frame 1 and a door body 2 hinged to the inner edge of the door frame 1 by a hinge 11; the door body 2 is closed with the door frame 1 by a door closer 12; an upper damping groove 21 is arranged on the top surface of the door body 2; the number of the upper damping grooves 21 is at least two; a plurality of the upper damping grooves 21 are distributed along the width of the door body 2; the upper damping grooves 21 are movably connected to an upper damping block 3; the lower end of the upper damping block 3 is connected to the bottom of the upper damping groove 21 by a first spring 31; a guide surface 32 is obliquely arranged on the upper end of the upper damping block 3; the guide surface 32 can be squeezed by the door frame 1 during the process of closing the door body 2 around the hinge 11; the guide surface 32 at the upper end of the upper damping block 3 can be retracted into the upper damping groove 21 by being squeezed by the door frame 1.

[0033] In this embodiment, the cross-sections of the upper damping groove 21 and the upper damping block 3 are both circular; the guide surface 32 of the upper damping block 3 at the upper end can retract to the corresponding upper damping groove 21 and rotate while in contact with the door frame 1.

[0034] Specifically, after the staff twists the handle on the door panel to unlock the door panel, they push or pull the door body 2 to rotate around the hinge 11, so that the door body 2 overcomes the resistance of the door closer 12 and opens. During the process of the door body 2 moving away from the inner side of the door frame 1, the upper damping block 3 is driven to move out from the inner side of the door frame 1. The first spring 31 gives the upper damping block 3 an elastic force away from the bottom of the upper damping groove 21, so that the upper damping block 3 extends out from the upper damping groove 21 under the action of the elastic force. After the door body 2 is opened, the staff will cross the inner side of the door frame 1 to reach the other side of the door body 2. When no one passes through the fire door, the door body 2 starts to close around the hinge 11 under the action of the door closer 12.

[0035] During the door closing process, the door body 2 will drive the upper damping block 3 at the top to move toward the door frame 1. The upper end of the upper damping block 3 is inclinedly provided with a guide surface 32, so that the upper damping block 3 will contact the door frame 1 through the guide surface 32 during the door closing process of the door body 2, and the door frame 1 will squeeze the guide surface 32 on the upper damping block 3. Since the lower end of the upper damping block 3 is fixedly connected to the bottom of the upper damping groove 21 through the first spring 31, the guide surface 32 on the upper damping block 3 can be restricted by the first spring 31 and face the door frame 1;

[0036] Since the first spring 31 itself can be twisted, when the guide surface 32 of the upper end of the upper damping block 3 is squeezed by the door frame 1, in order to make the guide surface 32 of the upper damping block 3 more fully contact with the door frame 1, the upper damping block 3 will overcome the torsion of the first spring 31 and slightly rotate in the upper damping groove 21. During the rotation of the upper damping block 3, the guide surface 32 can always ensure the most comprehensive contact with the door frame 1 as the door body 2 closes, thereby increasing the contact area between the guide surface 32 and the door frame 1, reducing the pressure of the door frame 1 on the guide surface 32 on the upper damping block 3, and reducing the damage to the upper damping block 3.

[0037] At the same time, the guide surface 32 of the upper damping block 3 is squeezed by the door frame 1 to form a downward component force, so that the upper damping block 3 overcomes the first spring 31 under the squeezing and moves downward in the upper damping groove 21. The setting of the first spring 31 can absorb the impact force formed by the closing of the door body 2 to achieve the buffering purpose. As the upper damping block 3 contacts the door frame 1, the speed of the door body 2 closing the door by the door closer 12 is reduced. The upper damping block 3 is arranged in multiple numbers, so that the door body 2 can drive multiple upper damping blocks 3 to contact the door frame 1, and one On the one hand, the buffering effect of the door body 2 is improved. On the other hand, the corresponding upper damping block 3 can be provided at any opening and closing angle of the door body 2 to form a buffer for the closing of the door body 2. The upper damping block 3 is squeezed by the door body 2 and will overcome the first spring 31 and retract into the upper damping groove 21. After the closing speed of the door body 2 is reduced, the force of the door closer 12 to close the door body 2 remains unchanged. In this way, the door closer 12 will drive the door body 2 and the door frame 1 to form a smaller door gap. When the door body 2 is further moved to the inner side of the door frame 1, the closing process of the door body 2 is realized.

[0038] The present invention arranges an upper damping block 3 and a first spring 31 capable of unloading force on the top of the door body 2, so that the door body 2 can be closed at a lower speed. Compared with the original method of directly closing the door using the door closer 12, the impact on the door body 2 during the closing process is reduced, thereby reducing the degree of deformation of the fire door due to vibration, thereby increasing the service life of the fire door.

[0039] Embodiment 2:

[0040] The upper damping block 3 is movably sealed to the inner wall of the upper damping groove 21; a first air hole 22 is provided at the bottom of the upper damping groove 21; the first air hole 22 is connected to the outside air at the lower end; the upper damping block 3 can form air resistance when it is squeezed back into the upper damping groove 21 by the door frame 1.

[0041] A lower damping groove 23 is provided on the bottom surface of the door body 2; the lower damping groove 23 is slidingly sealed and connected to the lower damping block 4; the upper surface of the lower damping block 4 and the upper groove wall of the lower damping groove 23 are connected through a tension spring 41; the upper groove wall of the lower damping groove 23 and the lower groove wall of the upper damping groove 21 are connected through a first air hole 22.

[0042] The lower damping block 4 is provided with second air holes 42 running through the upper and lower parts; the aperture of the second air holes 42 is smaller than the aperture of the first air holes 22; and the lower surface of the lower damping block 4 is parallel to the ground.

[0043] When the door closer 12 drives the door body 2 to close, the door body 2 drives the upper damping block 3 on the top surface to contact the door frame 1, so that the upper damping block 3 is pressed to overcome the elastic force of the first spring 31 and moves downward in the upper damping groove 21. During the downward movement of the upper damping block 3, the gas in the upper damping groove 21 is squeezed, so that the gas in the upper damping groove 21 is squeezed and discharged along the first air hole 22. Since the speed at which the gas in the upper damping groove 21 is pressed and discharged along the first air hole 22 is limited, the downward movement of the upper damping block 3 can be damped, that is, gas damping is formed, which further buffers and unloads the door body 2.

[0044] The first air hole 22 will inject gas into the lower damping groove 23, and the lower damping block 4 is provided with a second air hole 42 running through the upper and lower parts. The aperture of the second air hole 42 is smaller than the first air hole 22, so the speed at which the gas enters the lower damping groove 23 along the second air hole 42 is smaller than the speed at which the gas in the lower damping groove 23 is discharged along the second air hole 42, so that the lower damping block 4 moves downward under the action of the air pressure in the lower damping groove 23, overcoming the tension spring 41, and the lower damping block 4 moves downward after the lower end moves downward against the ground, and the lower damping block 4 forms a friction resistance with the ground at the lower end, and the lower damping block 4 is located directly below the corresponding upper damping block 3, so that the top and bottom of the door body 2 can form a unloading force, thereby improving the unloading effect of the door body 2 during the closing process, and at the same time avoiding the deformation of the door body 2 caused by the buffering of a single position of the door body 2;

[0045] The speed at which the lower damping block 4 extends out of the lower damping groove 23 is related to the speed of the gas discharged into the lower damping groove 23 by the first air hole 22 and the speed of the gas discharged from the second air hole 42. When the door body 2 is artificially opened to a greater extent, the door body 2 closes at a greater speed under the action of the door closer 12 and its own inertia. The faster the door body 2 closes, the faster the upper damping block 3 moves downward under pressure, and the faster the gas in the upper damping groove 21 enters the lower damping groove 23 along the first air hole 22. In this way, the lower damping block 4 extends out of the lower damping groove 23 faster, and the lower side of the lower damping block 4 is parallel to the ground. Therefore, when the lower damping block 4 moves downward and contacts the ground, the second air hole 42 is blocked, so that a temporary seal between the lower damping block 4 and the ground can be formed, making it difficult for the gas at the second air hole 42 to be discharged, thereby increasing the friction resistance between the lower damping block 4 and the ground, so that the speed of the door body 2 in the closing process is further reduced. After the door body 2 is closed, the gas at the second air hole 42 flows away along the gap between the lower side of the lower damping block 4 and the ground, and the tension spring 41 pulls the lower damping block 4 to move upward and break away from the contact with the ground, and the lower damping block 4 returns to the lower damping groove 23.

[0046] When the door body 2 is opened again and moved out from the inner side of the door frame 1, the first spring 31 will push the upper damping block 3 to extend out from the upper damping groove 21, and the outside gas will enter the upper damping groove 21 along the second air hole 42, the lower damping groove 23, and the first air hole 22, thereby replenishing the space gas in the upper damping groove 21.

[0047] Embodiment 3:

[0048] A one-way air outlet valve is arranged in the second air hole 42; the bottom of the upper damping groove 21 is connected to the outer wall of the door body 2 through an L-shaped one-way air inlet hole 24; a plurality of the one-way air inlet holes 24 pass through and are provided with a rotating groove 25 at the corners; the length direction of the rotating groove 25 is consistent with the width direction of the door body 2; the rotating groove 25 disconnects the two ends of the plurality of one-way air inlet holes 24; the rotating groove 25 is rotatingly sealed and connected to the rotating rod 5; a spiral groove 51 is arranged on the outer wall of the rotating rod 5; the number of spiral turns corresponding to the spiral groove 51 is one turn; the spiral groove 51 on the outer wall of the rotating rod 5 can ensure that the two ends of at least one of the one-way air inlet holes 24 are connected.

[0049] The top surface of the door body 2 is provided with a starting groove 26; the starting groove 26 is slidably connected to the starting strip 6; the starting strip 6 exposes the starting groove 26 at the upper end and is obliquely provided with a first starting surface 61; the lower end of the starting strip 6 is connected to the bottom of the starting groove 26 by a second spring 62; the middle section of the starting groove 26 is connected to the end of the rotating groove 25; the end of the rotating rod 5 is fixedly connected to the gear 52; the gear 52 is meshed with the one-way tooth 63 on the starting strip 6; the start strip 6 is provided with a tooth groove 64 on a side close to the gear 52; the one-way tooth 63 is slidably connected in the tooth groove 64; the one-way tooth 63 is connected to the bottom of the tooth groove 64 through a third spring 65; the one-way tooth 63 is obliquely provided with a second starting surface 631 upward; the second starting surface 631 on the one-way tooth 63 is squeezed by the gear 52 and can be retracted into the tooth groove 64 for avoidance; the one-way tooth 63 can mesh with the gear 52 for transmission during the downward movement of the start strip 6.

[0050] A countersunk threaded hole 27 is provided on one side of the door body 2 away from the hinge 11; a bolt 28 is connected to the inner thread of the threaded hole 27; the threaded hole 27 is connected to the start groove 26; a locking hole 66 is provided on one side of the start bar 6 close to the threaded hole 27; the locking hole 66 is aligned with the threaded hole 27 after the start bar 6 moves downward, and the bolt 28 can enter the locking hole 66.

[0051] The start slot 26 is located on the top surface of the door body 2 and is arranged away from the hinge 11 ; the start strip 6 can extend from the start slot 26 when the door body 2 is moved out of the door frame 1 .

[0052] When the door body 2 is closed under the action of the door closer 12, the upper damping block 3 is compressed to squeeze the gas in the upper damping groove 21, so that the gas in the upper damping groove 21 is discharged along the first air hole 22, the lower damping groove 23 and the second air hole 42. When the door body 2 is closed, the first guide surface 32 of the upper end of the starter strip 6 is driven to contact the door frame 1, so that the first starter surface 61 of the upper end of the starter strip 6 is squeezed, which drives the starter strip 6 to move downward in the starter groove 26. During the downward movement of the starter strip 6, the elastic force of the second spring 62 is overcome and the multiple one-way teeth 63 are driven to move downward. During the downward movement of the multiple one-way teeth 63, they are meshed with the gear 52, thereby driving the gear 52 to rotate. During the rotation of the gear 52, the rotating rod 5 is driven to rotate in the rotating groove 25.

[0053] The rotating rod 5 will drive the spiral groove 51 on the outer wall to rotate during the rotation process. The spiral groove 51 will change its position in the rotating groove 25 as the rotating rod 5 rotates, so that the corner position of the one-way air inlet hole 24 originally connected by the spiral groove 51 is disconnected as the rotating rod 5 rotates, so that one of the one-way air inlet holes 24 at other positions is opened under the action of the spiral groove 51. The disconnected one-way air inlet hole 24 will prevent the gas from entering the upper damping groove 21 for replenishment, while the opened one-way air inlet hole 24 will allow the gas to enter the upper damping groove 21 for replenishment, and the Since the number of spiral turns of the spiral groove 51 is one, no matter what the angle of the spiral groove 51 is when the rotating rod 5 rotates, a part of the spiral groove 51 can connect to the corner of one of the one-way air inlet holes 24, and the opened one-way air inlet hole 24 will prepare for the activated upper damping block 3. When the door body 2 is moved out from the inner side of the door frame 1 and opened by human action next time, the activated upper damping block 3 will move upward under the elastic force of the first spring 31, and the external air will enter the corresponding upper damping groove 21 along the opened one-way air inlet hole 24, so that the activated upper damping block 3 can extend;

[0054] The inactivated upper damping block 3 cannot extend out of the corresponding upper damping groove 21 and remains retracted in the corresponding upper damping groove 21. In addition, since the starter strip 6 is arranged on the top surface of the door body 2 away from the hinge 11, the door body 2 can also move out from the inner side of the door frame 1 when it is slightly opened, ensuring that the starter strip 6 is activated once each time the door body 2 is opened. In the process of the starter strip 6 moving out of the door frame 1 along with the door body 2, the second spring 62 will push the starter strip 6 to move upward, and the starter strip 6 will drive a plurality of evenly distributed one-way teeth 63 to move upward. Since the one-way tooth 63 is provided with a second starter surface 631 inclined upward, when the one-way tooth 63 contacts the gear 52 through the second starter surface 631, the second starter surface 631 overcomes the third spring 65 under the pressure of the gear 52 and retracts into the tooth groove 64 for avoidance.

[0055] In this way, the gear 52 cannot be driven to rotate by the one-way tooth 63 during the upward movement of the start bar 6, thereby preventing the rotating rod 5 from returning to its original position as the start bar 6 returns after driving the spiral groove 51 to rotate, thereby ensuring that the rotating rod 5 can drive the spiral groove 51 to cyclically contact with the multiple one-way air inlet holes 24; when the door body 2 is closed again, the activated upper damping block 3 forms a buffer unloading force for the closing of the door body 2, because the activated upper damping block 3 will be replaced once during each closing process of the door body 2, so that the position of the upper damping block 3 on the door body 2 is changed, thereby avoiding the deformation of the door body 2 caused by the impact at the same position, making the top or bottom of the door body 2 more evenly stressed in the width direction of the door body 2, further reducing the deformation of the door body 2;

[0056] In addition, when the door body 2 is open, the rotating rod 5 can be driven to rotate in the rotating groove 25 by repeatedly pressing the starting bar 6, and when the upper damping block 3 at the corresponding position is enabled, the bolt 28 is rotated so that the bolt 28 passes through the threaded hole 27 and is inserted into the lock hole 66, so that the starting bar 6 cannot move up, so that the starting bar 6 remains retracted into the starting groove 26, and the unactivated upper damping block 3 cannot be reset when pressed, and the enabled upper damping block 3 can be reset when pressed, so that the position of the upper damping block 3 at the top of the door body 2 can be fixed to meet different usage requirements. It is specifically determined according to the angle at which the door body 2 is frequently opened and closed or the closing force of the door closer 12, and adjusted according to actual needs. For example, when the opening and closing angle of the door body 2 is large, the upper damping block 3 close to the hinge 11 can be selected, so that the force can be unloaded in time.

[0057] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0058] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An earthquake-resistant and anti-deformation fireproof door, comprising a door frame and a door body whose inner edge is hinged by hinges; the door body is closed to the door frame by a door closer; Features: The top surface of the door body is provided with an upper damping groove; the number of the upper damping grooves is at least two; the plurality of the upper damping grooves are distributed along the width of the door body; the upper damping groove is movably connected to the upper damping block; the lower end of the upper damping block is connected to the bottom of the upper damping groove by a first spring; the upper end of the upper damping block is obliquely provided with a guide surface; the guide surface can be squeezed by the door frame during the process of the door body closing around the hinge; the guide surface of the upper end of the upper damping block can be retracted into the upper damping groove by being squeezed by the door frame; The bottom of the upper damping groove is provided with a first air hole; the first air hole is connected to the outside air at the lower end, and the bottom surface of the door body is provided with a lower damping groove; the lower damping groove is slidingly sealed and connected to the lower damping block, and the upper groove wall of the lower damping groove is connected with the lower groove wall of the upper damping groove through the first air hole; the lower damping block is penetrated by a second air hole from top to bottom; A one-way air outlet valve is arranged in the second air hole; the bottom of the upper damping groove is connected to the outer wall of the door body through an L-shaped one-way air inlet hole; a plurality of the one-way air inlet holes pass through and are provided with a rotation groove at the corner; the length direction of the rotation groove is consistent with the width direction of the door body; the rotation groove disconnects the two ends of the plurality of one-way air inlet holes; the rotating seal in the rotation groove is connected to the rotating rod; a spiral groove is arranged on the outer wall of the rotating rod; the number of spiral turns corresponding to the spiral groove is one turn; the spiral groove on the outer wall of the rotating rod can ensure that the two ends of at least one of the one-way air inlet holes are connected; A starting groove is provided on the top surface of the door body; the starting groove is slidably connected to the starting strip; the starting groove is exposed at the upper end of the starting strip and a first starting surface is obliquely provided; the lower end of the starting strip is connected to the bottom of the starting groove by a second spring; the middle position of the starting groove is connected to the end of the rotating groove; the end of the rotating rod is fixedly connected to the gear; the gear is meshed with the one-way tooth on the starting strip; a tooth groove is provided on the side of the starting strip close to the gear; the one-way tooth is slidably connected in the tooth groove; the one-way tooth is connected to the bottom of the tooth groove through a third spring; the one-way tooth is obliquely provided with a second starting surface upwardly; the second starting surface on the one-way tooth can be retracted into the tooth groove for avoidance under the pressure of the gear; the one-way tooth can mesh with the gear for transmission during the downward movement of the starting strip.

2. A seismic and deformation-resistant fire door according to claim 1, Features: The cross sections of the upper damping groove and the upper damping block are both circular; the guide surface of the upper damping block close to the upper end can be retracted to the corresponding upper damping groove and rotate at the same time during the contact process with the door frame.

3. A seismic and deformation-resistant fire door according to claim 2, Features: The upper damping block is movably and hermetically connected to the inner wall of the upper damping groove; and air resistance can be formed in the process of the upper damping block being squeezed back into the upper damping groove by the door frame.

4. A seismic and deformation-resistant fire door according to claim 3, Features: The upper surface of the lower damping block is connected to the upper groove wall of the lower damping groove through a tension spring.

5. A seismic and deformation-resistant fire door according to claim 4, Features: The aperture of the second air hole is smaller than the aperture of the first air hole; and the lower surface of the lower damping block is parallel to the ground.

6. A seismic and deformation-resistant fire door according to claim 5, Features: A countersunk threaded hole is provided on one side of the door body away from the hinge; a bolt is connected to the inner thread of the threaded hole; the threaded hole is connected to the start slot; a lock hole is provided on one side of the start bar close to the threaded hole; the lock hole is aligned with the threaded hole after the start bar moves downward, and the bolt can enter the lock hole.

7. A seismic and deformation-resistant fire door according to claim 6, Features: The start slot is located on the top surface of the door body and is arranged away from the hinge direction; the start strip can extend from the start slot during the process of the door body moving out of the door frame.

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