Door leaf sealing structure and sealing method thereof

Abstract

The invention relates to the technical field of door leaf structures, in particular to a door leaf sealing structure and a sealing method thereof.The edge of the outer side of a door body is provided with an extending part, the outer side of a door frame is correspondingly provided with an avoiding step, the inner side end of the extending part is provided with a sealing strip, the outer ring of the door body is provided with a groove, and a first sealing block is slidably connected into the groove; a second sealing block is movably connected into the door frame, in the initial state, the second sealing block is located in the door frame and pushes the sliding block to slide outwards, when the door body is rotationally closed, the sliding block is pushed to slide inwards through the sealing strip, the second sealing block is pushed by the transmission rod to gradually and movably penetrate out along the through opening, and the door body is closed completely in place. One end of the second sealing block completely and movably penetrates out along the through opening, the second sealing block abuts against the first sealing block for sealing, when the door is opened again from the door closing state, the door lock is opened firstly, the spring bolt shrinks towards the interior of the door body, at the moment, the first sealing block slides inwards along the groove and is separated from the second sealing block, and therefore the door can be easily opened.

Description

Technical Field

[0001] The present invention relates to the technical field of door leaf structures, and in particular to a door leaf sealing structure and a sealing method thereof. Background Art

[0002] In scenarios where environmental noise is more prominent or there is a high requirement for environmental quietness, or there is a high requirement for environmental air quality, it is usually possible to close doors and windows to reduce the impact of noise, and obtain an indoor environment with good air quality through filtering and exchanging air through the indoor fresh air system. After closing the door, the gap between the door and the door frame or between the door and the ground becomes the main noise and ventilation path. Therefore, how to optimize the sealing degree of the door leaf becomes a key issue. The prior art often uses door body materials and structures with good sealing effects, as well as a passive sealing method in which a sealing strip is squeezed at the edge of the door frame when the door body is closed. However, the sealing strip has the problem of friction loss with the edge of the door frame. After long-term use, it is bound to cause a loss of sealing effect. Moreover, a single sealing strip setting still has the problem of poor sealing effect. In addition, a single sealing strip is bound to tightly compress and squeeze the edge of the door frame to form a good seal, which is bound to bring certain resistance when opening and closing the door, which is not conducive to smooth opening and closing of the door. Summary of the invention

[0003] In view of this, the purpose of the present invention is to propose a door leaf sealing structure and a sealing method thereof to solve the problems of the existing single sealing strip extrusion type passive sealing method, poor sealing effect, easy wear of the sealing strip, and certain resistance caused by opening and closing the door.

[0004] Based on the above purpose, the present invention provides a door leaf sealing structure, including a door frame, and a door body hinged in the door frame, a lock tongue is movably connected to one side of the door body, and a lock hole is correspondingly opened on the door frame:

[0005] An extension is provided on the outer edge of the door body, and an avoidance step is correspondingly provided on the outer side of the door frame. When the door body is in a closed state, the outer circle of the door body faces the inner circle of the door frame, and the outer circle of the extension faces the inner circle of the avoidance step;

[0006] A sealing strip is provided on the inner end of the extension portion, a groove is provided at the outer ring of the door body, a first sealing block is slidably connected in the groove, a first elastic member is connected between the inner end of the first sealing block and the inside of the groove, and is used to push the first sealing block outward, and when the lock tongue contracts toward the inside of the door body, the first sealing block is triggered to slide inward along the groove;

[0007] A second sealing block is movably connected in the door frame, and a through opening is opened on the inner ring of the door frame for the second sealing block to movably pass through. A slider is connected to the door frame for transverse sliding movement. One end of the slider is connected to a transmission rod, and the other end passes through the side end of the avoidance step to go out of the door frame. In the initial state, the second sealing block is located in the door frame and pushes the slider to slide outward. When the door body is rotated and closed, the sealing strip pushes the slider to slide inward, and the transmission rod pushes the second sealing block to gradually move out along the through opening until the second sealing block abuts and seals the first sealing block.

[0008] Preferably, the side end surface of the sealing strip is designed to be an outwardly convex arc-shaped end surface, and the outer end of the sliding block is provided with a sealing surface matching the arc-shaped end surface of the sealing strip.

[0009] Preferably, a protrusion is provided at the outer bottom end of the sliding block, and the protrusion abuts against the bottom end surface of the avoidance step.

[0010] Preferably, a door handle is rotatably connected to the door body, and the door handle is transmission-connected to the lock tongue through the main shaft body and the lock core, so as to drive the lock tongue to move and retract. A pull rope is connected to the inner end of the first sealing block, and one end of the pull rope penetrates into the door body along the groove and is connected to the main shaft body, so that when the lock tongue moves and retracts, the first sealing block is pulled inward along the groove by the pull rope.

[0011] Preferably, the side end of the second sealing block is rotatably connected to the door frame via a rotating shaft, and a second elastic member is provided at the rotating connection to drive the second sealing block to rotate in the door frame so that the outer end surface of the second sealing block is flush with the inner ring plane of the door frame. The side end of the rotating shaft is connected to a push rod along its radial direction. When the slider slides inward, the transmission rod pushes the push rod inward, driving the second sealing block to rotate so that the top end surface of the second sealing block rotates out along the through opening.

[0012] Preferably, the top end surface of the second sealing block is designed to be an outwardly convex arc-shaped end surface, which is used for abutting and sealing with the first sealing block.

[0013] Preferably, the slider and the protrusion are designed as a hollow structure that is internally connected. A plurality of air holes are opened on the inner circle of the door frame, a plurality of internal air holes are correspondingly opened on the top of the slider, and a plurality of external air holes are opened on the outer end of the protrusion. One end of the transmission rod passes through the slider and is connected to a connecting rod, and one end of the connecting rod is connected to a sealing plate. A limit rod is passed through the bottom end of the slider, and the limit rod is pressed against the transmission rod to prevent the transmission rod from moving toward the inside of the slider, so that the sealing plate is located at a position to close the internal air holes. An adjustment part is connected to the outside of the door frame, and one end of the adjustment part is connected to an adjustment rope, one end of the adjustment rope passes through the door frame and is connected to the limit rod. The adjustment rope is tightened through the adjustment part to drive the limit rod to move outward until it is disengaged from the transmission rod.

[0014] Preferably, one end of the transmission rod that penetrates into the slider is elastically connected to the inside of the slider, so as to push the transmission rod to slide outward and reset.

[0015] The present invention also provides a door leaf sealing method, comprising the following steps:

[0016] When the lock tongue of the door body is in the pop-up state, the first elastic member is used to push the first sealing block outward, and when the lock tongue is retracted toward the inside of the door body, the first sealing block is triggered to slide inward along the groove;

[0017] In the initial state, the second sealing block is located in the door frame and pushes the slider to slide outward. During the process of the door body rotating and closing, the sealing strip pushes the slider to slide inward, and the transmission rod pushes the second sealing block to gradually move out along the through opening. When the door is completely closed, one end of the second sealing block moves out along the through opening completely. As the lock tongue pops out toward the lock hole, the second sealing block abuts against the first sealing block for sealing.

[0018] When opening the door from a closed state, the door lock is first unlocked so that the lock tongue contracts toward the inside of the door body. At this time, the first sealing block slides inward along the groove and separates from the second sealing block, so that the door can be easily opened.

[0019] The beneficial effects of the present invention are as follows: an extension is provided on the outer edge of the door body, an avoidance step is correspondingly provided on the outer side of the door frame, a sealing strip is provided on the inner end of the extension, a groove is provided at the outer ring of the door body, a first sealing block is slidably connected in the groove, and a second sealing block is movably connected in the door frame. In the initial state, the second sealing block is located in the door frame and pushes the slider to slide outward. When the door body is rotated to close, the sealing strip pushes the slider to slide inward, and the transmission rod pushes the second sealing block to gradually move out along the through opening until the door is completely closed. At this time, one end of the second sealing block is completely moved out along the through opening, and the lock The tongue pops out toward the lock hole, that is, the first sealing block pops out outward. At this time, the second sealing block abuts against the first sealing block for sealing, thereby achieving a better sealing effect through the internal and external double sealing of the sealing block and the sealing strip. The movable active sealing method also does not have the problem of seal wear. When opening the door from a closed state, first open the door lock so that the lock tongue shrinks toward the inside of the door body. At this time, the first sealing block slides inward along the groove and separates from the second sealing block, so that the door can be opened easily, thereby avoiding wear of the seal and avoiding increased resistance to door opening and closing caused by tight squeezing of the seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the avoidance step and the extension part in the initial state of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the avoidance step and the extension part during the door body rotation and closing process of the present invention;

[0024] Figure 4 It is a structural schematic diagram of the avoidance step and the extension part when the door body of the present invention is fully closed;

[0025] Figure 5 It is a structural schematic diagram of the avoidance step and the extension part when the door body of the present invention is closed and then opened;

[0026] Figure 6 It is a structural schematic diagram of the present invention when the slider and the protrusion are designed to be a hollow structure that is internally connected;

[0027] Figure 7 For the present invention Figure 6 The enlarged schematic diagram of point A in the middle;

[0028] Figure 8 It is a structural schematic diagram of the push rod of the present invention when pushing the transmission rod backward;

[0029] Fig. 9 For the present invention Figure 8 A magnified schematic diagram of point B in the middle.

[0030] The markings in the figure are:

[0031] 100. Door frame; 101. Avoidance step; 102. Through hole; 200. Door body; 201. Extension part; 202. Recess; 203. Door handle; 1. Sealing strip; 2. First sealing block; 21. Pull rope; 3. First elastic member; 4. Second sealing block; 41. Rotating shaft; 42. Push rod; 5. Slider; 51. Bump; 6. Transmission rod; 7. Air vent; 8. Internal air vent; 9. External air vent; 10. Connecting rod; 11. Closing plate; 12. Limit rod; 13. Adjustment part; 14. Adjustment rope. DETAILED DESCRIPTION

[0032] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0033] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0034] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, a door leaf sealing structure includes a door frame 100, and a door body 200 hinged in the door frame 100, a lock tongue is movably connected to one side of the door body 200, a lock hole is correspondingly opened on the door frame 100, an extension portion 201 is provided on the outer edge of the door body 200, and an avoidance step 101 is correspondingly provided on the outer side of the door frame 100. When the door body 200 is in a closed state, the outer ring of the door body 200 faces the inner ring of the door frame 100, the outer ring of the extension portion 201 faces the inner ring of the avoidance step 101, a sealing strip 1 is provided on the inner end of the extension portion 201, a groove 202 is opened at the outer ring of the door body 200, a first sealing block 2 is slidably connected in the groove 202, and a first elastic member 3 is connected between the inner end of the first sealing block 2 and the inside of the groove 202, which is used to push the first sealing block 2 outward. When the sealing block 2 and the lock tongue retract toward the inside of the door body 200, the first sealing block 2 is triggered to slide inward along the groove 202, and the second sealing block 4 is movably connected in the door frame 100. The inner ring of the door frame 100 is provided with a through hole 102 for the second sealing block 4 to movably pass through. A slider 5 is lateral slidingly connected in the door frame 100, one end of the slider 5 is connected to a transmission rod 6, and the other end passes through the side end of the avoidance step 101 to go out of the door frame 100. In the initial state, the second sealing block 4 is located in the door frame 100 and pushes the slider 5 to slide outward. When the door body 200 is rotated and closed, the sealing strip 1 pushes the slider 5 to slide inward, and the transmission rod 6 pushes the second sealing block 4 to gradually move out along the through hole 102 until the second sealing block 4 is abutted and sealed against the first sealing block 2.

[0035] The present invention is based on the existing conventional door leaf structure, such as Figure 1As shown, it includes a door frame 100 and a door body 200 hinged in the door frame 100. Usually, a lock tongue is movably connected to one side of the door body 200, and a lock hole is correspondingly opened on the door frame 100. The other side of the door body 200 is hinged to the door frame 100 through a hinge or other structure. In particular, Figure 1 , Figure 2 As shown, the outer edge of the door body 200 is provided with an extension portion 201, and the outer side of the door frame 100 is correspondingly provided with an avoidance step 101. For example, the door body 200 is designed as an outward opening door structure. Figure 1 This is a front view of the door body 200 when standing indoors. Figure 1 The dotted line in the figure indicates the edge of the extension part 201. When the door body 200 is in a closed state, the outer circle of the door body 200 faces the inner circle of the door frame 100, and the outer circle of the extension part 201 faces the inner circle of the avoidance step 101. A sealing strip 1 is provided on the inner end of the extension part 201. A groove 202 is provided at the outer circle of the door body 200. The groove 202 is provided along the length direction of the outer side of the door body 200, and can be provided on the outer bottom edge or multiple outer sides of the door body 200. The corresponding sealing structure is also provided on the bottom edge or multiple outer sides of the gap between the door body 200 and the door frame 100.

[0036] A first sealing block 2 is slidably connected in the groove 202, and a first elastic member 3 is connected between the inner end of the first sealing block 2 and the inside of the groove 202. The first elastic member 3 can be an existing conventional elastic member such as a spring. More preferably, a plurality of first elastic members 3 are spaced apart along the length direction of the first sealing block 2. When the lock tongue is in the pop-up state, the first elastic member 3 is used to push the first sealing block 2 outward. When the lock tongue contracts toward the inside of the door body 200, the first sealing block 2 is triggered to slide inward along the groove 202. A second sealing block 4 is movably connected in the door frame 100, and a through hole 102 is provided on the inner ring of the door frame 100 for the second sealing block 4 to movably pass through. A slider 5 is slidably connected in the door frame 100, and one end of the slider 5 is connected to a transmission rod 6, and the other end passes through the outside of the door frame 100 along the side end of the avoidance step 101. In the initial state, Figure 2 As shown, the second sealing block 4 is located in the door frame 100 and pushes the slider 5 to slide outward. When the door body 200 rotates to close, as shown in FIG. Figure 3 As shown, the sealing strip 1 pushes the slider 5 to slide inward, and the transmission rod 6 pushes the second sealing block 4 to gradually move out along the through opening 102 until the door is completely closed. At this time, Figure 4As shown, one end of the second sealing block 4 is completely movable and extended along the through opening 102, and the lock tongue pops out toward the lock hole, that is, the first sealing block 2 pops out outward. At this time, the second sealing block 4 is in contact with the first sealing block 2 for sealing, so that the inner and outer double sealing of the sealing block and the sealing strip 1 can achieve a better sealing effect. The movable active sealing method also does not have the problem of wear of the sealing component. When opening the door from the closed state, the door lock is first opened to make the lock tongue shrink toward the inside of the door body 200. At this time, as shown in FIG. Figure 5 As shown, the first sealing block 2 slides inward along the groove 202 and disengages from the second sealing block 4, so that the door can be opened easily, thereby avoiding wear of the sealing member and increasing the door opening and closing resistance caused by tight squeezing of the sealing member.

[0037] In an embodiment of the present invention, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the side end face of the sealing strip 1 is designed to be an outwardly convex arc end face, and the outer end of the slider 5 is provided with a sealing surface matching the arc end face of the sealing strip 1, which is conducive to a better sealing effect.

[0038] In an embodiment of the present invention, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the outer bottom end of the slider 5 is provided with a protrusion 51, and the protrusion 51 abuts against the bottom end surface of the avoidance step 101, as shown in FIG. Figure 2 As shown, on the one hand, it is conducive to the stable sliding of the slider 5. On the other hand, when the slider 5 is fully extended outward, the protrusion 51 is used to firmly support the slider 5. The top surface of the slider 5 is close to the inner ring plane of the door frame 100, and the outer end surfaces of the slider 5 and the protrusion 51 are close to the outer plane of the door frame 100, which is conducive to the slider 5, the protrusion 51 and the door frame 100 forming a relatively regular rectangular shape.

[0039] Preferably, an elastic component such as a spring may be provided between the inner end of the slider 5 and the interior of the door frame 100 , or between the interior of the door frame 100 and the inner end of the protrusion 51 , to assist in pushing out the slider 5 .

[0040] As an optional embodiment of the present invention, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, a door handle 203 is rotatably connected to the door body 200, and the door handle 203 is transmission-connected to the lock tongue through the main shaft body and the lock core, so as to drive the lock tongue to move and retract. A pull rope 21 is connected to the inner end of the first sealing block 2, and one end of the pull rope 21 passes through the door body 200 along the groove 202 and is connected to the main shaft body. Specifically, one end of the pull rope 21 can be wrapped around the end of the main shaft body extending into the door, so as to rotate the door handle 203, so that when the lock tongue moves and retracts, the first sealing block 2 is pulled inward along the groove 202 by the pull rope 21. Of course, a rotating rope drum can also be provided in the door lock, which can be used to trigger the rotation of the rope drum and pull the pull rope 21 by detecting different door lock states.

[0041] In an embodiment of the present invention, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the side end of the second sealing block 4 is rotatably connected to the door frame 100 via a rotating shaft 41, and a second elastic member is provided at the rotating connection. The second elastic member can be a conventional elastic member such as a torsion spring, which is used to drive the second sealing block 4 to rotate in the door frame 100. Figure 2 As shown, the outer end face of the second sealing block 4 is flush with the inner ring plane of the door frame 100, and the side end of the rotating shaft 41 is connected to the push rod 42 along its radial direction. When the slider 5 slides inward, the transmission rod 6 pushes the push rod 42 inward, driving the second sealing block 4 to rotate, so that the top end face of the second sealing block 4 is rotated out along the through opening 102.

[0042] In an embodiment of the present invention, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the top end surface of the second sealing block 4 is designed to be a convex arc-shaped end surface, which is used to abut and seal with the first sealing block 2. Specifically, the bottom end of the first sealing block 2 can be made of the same conventional rubber sealing material as the sealing strip 1, which is conducive to a better extrusion sealing effect. The side end surface of the door frame 100 located on the side of the through opening 102 can be designed to be an arc-shaped end surface shape matching the top end surface of the second sealing block 4. When the top end surface of the second sealing block 4 is turned into the through opening 102, it can be abutted against the door frame 10 The inner wall of the second sealing block 4 is scraped to remove the dirt on the top surface of the second sealing block 4, so as to prevent large particles of dirt from adhering to the top surface of the second sealing block 4 and generating a gap to reduce the sealing effect when the second sealing block 2 is abutted and sealed. The opening size of the through hole 102 is matched with the outer end surface size of the second sealing block 4, which is also conducive to preventing dirt from falling into the door frame 100. The door frame 100 can also be designed as a hollow chamber structure. Even if a small amount of dirt falls into the door frame 100, it will not affect the movement and use of the overall sealing block slider.

[0043] As an optional embodiment of the present invention, Figure 6 , Figure 7 , Figure 8 , Fig. 9 As shown, the slider 5 and the protrusion 51 are designed as a hollow structure with the interior communicating with each other. A plurality of air holes 7 are provided on the inner ring of the door frame 100, a plurality of internal air holes 8 are correspondingly provided on the top of the slider 5, a plurality of external air holes 9 are provided on the outer end of the protrusion 51, one end of the transmission rod 6 penetrates into the slider 5 and is connected to a connecting rod 10, one end of the connecting rod 10 is connected to a sealing plate 11, and a limiting rod 12 is provided at the bottom end of the slider 5, as shown in FIG. Figure 6 , Figure 7 As shown, the limiting rod 12 is pressed against the transmission rod 6 so that the transmission rod 6 cannot move toward the inside of the slider 5, so that the sealing plate 11 is located at the position of closing the inner vent 8. At this time, the gap between the door frame 100 and the door body 200 is sealed, and the transmission rod 6 in a fixed position is used to push the push rod 42. At the same time, an adjusting portion 13 can be connected to the outside of the door frame 100, and one end of the adjusting portion 13 is connected to an adjusting rope 14. Specifically, the adjusting portion 13 can be configured to be rotatably connected to an adjusting knob on the door frame 100, and the adjusting rope 14 is wound around the adjusting knob. One end of the adjusting rope 14 passes through the door frame 100 and is connected to the limiting rod 12. By rotating the adjusting portion 13, the adjusting rope 14 is used to tighten the adjusting rope 14 and drive the corresponding limiting rod 12 at the same side position to move outward until the limiting rod 12 is separated from the transmission rod 6. Figure 8 , Fig. 9 As shown, at this time, the push rod 42 is able to push the transmission rod 6 in reverse, and the second sealing block 4 rotates axially along the rotating shaft 41, thereby releasing the seal on one side. At the same time, the transmission rod 6 drives the sealing plate 11 to move, so that the air vent 7, the inner air vent 8, and the outer air vent 9 are connected. Therefore, when closing the door, the user can control the gap between the door body 200 and the door frame 100 to be in a sealed state or a ventilated state through the adjustment part 13 according to the influence of the outdoor environment's noise, air quality, etc. or their own needs, which is more convenient and user-friendly to use.

[0044] In an embodiment of the present invention, Figure 6 , Figure 7 , Figure 8 , Fig. 9 As shown, one end of the transmission rod 6 that passes through the slider 5 is elastically connected to the inside of the slider 5, and the limiting rod 12 is elastically connected to the inside of the door frame 100. Specifically, the elastic connection can be achieved by using existing conventional elastic components such as springs. Therefore, when the sealing mode is switched again, the side end of the second sealing block 4 can be manually pushed inward to rotate it to a state where the top end passes through the through opening 102. At this time, the transmission rod 6 slides outward to reset, and then the adjustment rope 14 is loosened by reversing the adjustment part 13 on the same side, so that the limiting rod 12 can be reset to one side of the transmission rod 6 again.

[0045] The present invention also provides a door leaf sealing method, comprising the following steps:

[0046] When the lock tongue of the door body 200 is in the pop-up state, the first elastic member 3 is used to push the first sealing block 2 outward, and when the lock tongue contracts toward the inside of the door body 200, the first sealing block 2 is triggered to slide inward along the groove 202;

[0047] In the initial state, if Figure 2 As shown, the second sealing block 4 is located in the door frame 100 and pushes the slider 5 to slide outward. When the door body 200 rotates and closes, Figure 3 As shown, the sealing strip 1 pushes the slider 5 to slide inward, and the transmission rod 6 pushes the second sealing block 4 to gradually move out along the through opening 102 until the door is completely closed. Figure 4 As shown, one end of the second sealing block 4 is completely movable and passes through the through opening 102, and because the lock tongue pops out toward the lock hole, the second sealing block 4 abuts against the first sealing block 2 to seal;

[0048] When opening the door from the closed state, first unlock the door lock so that the lock tongue retracts toward the inside of the door body 200. Figure 5 As shown, the first sealing block 2 slides inward along the groove 202 and disengages from the second sealing block 4, so that the door can be opened easily, thereby avoiding wear of the sealing member and increasing the door opening and closing resistance caused by tight squeezing of the sealing member.

[0049] In addition, optionally, a dust filter can be provided at the air vent 7, and a micro air pump for increasing air circulation can be added in the hollow slider 5. The transmission rod 6 can also adopt existing conventional electric telescopic rod and other structures. The adjustment part 13 can control the transmission rods 6 on each side to extend or retract through electric control, so as to control the gap between the door body 200 and the door frame 100 to be in a sealed state or a ventilated state. More preferably, the adjustment part 13 can also be provided with existing conventional devices such as smoke sensors, temperature transmitters, etc. When high-temperature smoke is detected, it triggers the switching of the sealed state or the ventilated state to achieve an additional automatic fire protection function.

[0050] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

Claims

1. A door leaf sealing structure, comprising a door frame (100), and a door body (200) hinged in the door frame (100), a lock tongue being movably connected to one side of the door body (200), and a lock hole being correspondingly provided on the door frame (100), characterized in that: An extension portion (201) is provided on the outer edge of the door body (200), and an avoidance step (101) is correspondingly provided on the outer side of the door frame (100); when the door body (200) is in a closed state, the outer circle of the door body (200) faces the inner circle of the door frame (100), and the outer circle of the extension portion (201) faces the inner circle of the avoidance step (101); A sealing strip (1) is provided on the inner end of the extension portion (201); a groove (202) is provided at the outer ring of the door body (200); a first sealing block (2) is slidably connected in the groove (202); a first elastic member (3) is connected between the inner end of the first sealing block (2) and the inside of the groove (202) for pushing the first sealing block (2) outwards; when the lock tongue contracts toward the inside of the door body (200), the first sealing block (2) is triggered to slide inwards along the groove (202); A second sealing block (4) is movably connected inside the door frame (100), and a through hole (102) is provided on the inner ring of the door frame (100) for the second sealing block (4) to movably pass through. A slider (5) is lateraly slidably connected inside the door frame (100), and one end of the slider (5) is connected to a transmission rod (6), and the other end passes through the side end of the avoidance step (101) to the outside of the door frame (100). In an initial state, the second sealing block (4) is located inside the door frame (100) and pushes the slider (5) to slide outward. When the door body (200) is rotated to close, the sealing strip (1) pushes the slider (5) to slide inward, and the transmission rod (6) pushes the second sealing block (4) to gradually move out along the through hole (102) until the second sealing block (4) abuts against the first sealing block (2) to seal.

2. A door leaf sealing structure according to claim 1, characterized in that: The side end surface of the sealing strip (1) is designed to be an outwardly convex arc-shaped end surface, and the outer end of the sliding block (5) is provided with a sealing surface matching the arc-shaped end surface of the sealing strip (1).

3. A door leaf sealing structure according to claim 1, characterized in that: A convex block (51) is provided at the outer bottom end of the sliding block (5), and the convex block (51) abuts against the bottom end surface of the avoidance step (101).

4. A door leaf sealing structure according to claim 1, characterized in that: A door handle (203) is rotatably connected to the door body (200), and the door handle (203) is transmission-connected to the lock tongue through the main shaft body and the lock core, and is used to drive the lock tongue to move and retract. A pull rope (21) is connected to the inner end of the first sealing block (2), and one end of the pull rope (21) penetrates into the door body (200) along the groove (202) and is connected to the main shaft body, so that when the lock tongue moves and retracts, the first sealing block (2) is pulled by the pull rope (21) to slide inward along the groove (202).

5. A door leaf sealing structure according to claim 1, characterized in that: The side end of the second sealing block (4) is rotatably connected to the door frame (100) via a rotating shaft (41), and a second elastic member is provided at the rotating connection for driving the second sealing block (4) to rotate in the door frame (100) so that the outer end surface of the second sealing block (4) is flush with the inner ring plane of the door frame (100). The side end of the rotating shaft (41) is connected to a push rod (42) along its radial direction. When the slider (5) slides inward, the transmission rod (6) pushes the push rod (42) inward, driving the second sealing block (4) to rotate, so that the top end surface of the second sealing block (4) rotates out along the through opening (102).

6. A door leaf sealing structure according to claim 5, characterized in that: The top end surface of the second sealing block (4) is designed as an outwardly convex arc-shaped end surface, which is used for abutting and sealing with the first sealing block (2).

7. A door leaf sealing structure according to claim 3, characterized in that: The slider (5) and the protrusion (51) are designed as a hollow structure with the interior communicating with each other. A plurality of air holes (7) are provided on the inner ring of the door frame (100). A plurality of internal air holes (8) are correspondingly provided on the top of the slider (5). A plurality of external air holes (9) are provided on the outer end of the protrusion (51). One end of the transmission rod (6) penetrates into the slider (5) and is connected to a connecting rod (10). One end of the connecting rod (10) is connected to a sealing plate (11). A limiting rod (12) is provided at the bottom end of the slider (5). (12) abuts against the transmission rod (6) so that the transmission rod (6) cannot move toward the inside of the slider (5), so that the sealing plate (11) is located at a position to close the inner vent hole (8); the door frame (100) is externally connected with an adjusting portion (13), one end of the adjusting portion (13) is connected with an adjusting rope (14), one end of the adjusting rope (14) passes through the door frame (100) and is connected to the limiting rod (12); the adjusting rope (14) is tightened through the adjusting portion (13) to drive the limiting rod (12) to move outward until it is separated from the transmission rod (6).

8. A door leaf sealing structure according to claim 7, characterized in that: One end of the transmission rod (6) that penetrates into the slider (5) is elastically connected to the inside of the slider (5) and is used to push the transmission rod (6) to slide outward and reset.

9. A door leaf sealing method, the method adopting the door leaf sealing structure according to any one of claims 1 to 8 for sealing, characterized in that: The following steps are involved: When the lock tongue of the door body (200) is in a pop-up state, the first elastic member (3) is used to push the first sealing block (2) outward, and when the lock tongue contracts toward the inside of the door body (200), the first sealing block (2) is triggered to slide inward along the groove (202); In the initial state, the second sealing block (4) is located in the door frame (100) and pushes the slider (5) to slide outward. During the process of the door body (200) rotating and closing, the sealing strip (1) pushes the slider (5) to slide inward, and the transmission rod (6) pushes the second sealing block (4) to gradually move out along the through opening (102). When the door is completely closed, one end of the second sealing block (4) moves out along the through opening (102). As the lock tongue pops out toward the lock hole, the second sealing block (4) contacts and seals the first sealing block (2). When opening the door from a closed state, the door lock is first unlocked so that the lock tongue contracts toward the inside of the door body (200). At this time, the first sealing block (2) slides inward along the groove (202) and disengages from the second sealing block (4), so that the door can be easily opened.

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