Sealing structure for threshold-free civil air defense door

Abstract

The invention discloses a sealing structure for a doorsill-free civil air defense door, and belongs to the technical field of civil air defense door sealing structures, the sealing structure comprises a sealing plate, the sealing plate is arranged on one side of a door leaf and can translate relative to the door leaf along the height direction of the door leaf or turn over relative to the door leaf around an axis parallel to the width direction of the door leaf; the connecting block is fixed on the sealing plate; the sliding block is arranged on one side of the door leaf and hinged to the connecting block, and the sliding block is configured to slide in the height direction of the door leaf relative to the door leaf; when the limiting assembly moves downwards to the ground and is extruded, the limiting assembly unlocks the sliding block and the connecting block and locks the sliding block and the door leaf, and under the condition, in the process of pushing the sealing plate downwards, the sealing plate can deflect downwards and be pressed between the door leaf and the ground, so that the door leaf is prevented from being damaged. Therefore, sealing between the door leaf and the ground is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air defense door sealing structure, and particularly relates to a sealing structure for a no-threshold air defense door. BACKGROUND

[0002] In order to realize sealing, a traditional air defense door sets a convex metal or concrete threshold on the ground, but this design has obvious defects: it hinders the passage of vehicles, wheelchair / mortar movement, and is particularly unsuitable for hospitals, garages, shopping malls and other places with high requirements for "barrier-free access". The no-threshold air defense door is born to solve this pain point: cancel the fixed threshold on the ground, and form a temporary sealing surface through the optimization of the door body structure when it is closed, thus retaining the protection ability of the air defense door and realizing barrier-free access at ordinary times.

[0003] The current no-threshold air defense door seals between the door leaf and the ground by configuring a lifting type sealing structure or a turnover type sealing structure. For the turnover type sealing structure, since the position of the sealing structure relative to the door leaf is relatively fixed, when there is an error in the installation height of the door leaf or the ground subsides, the sealing effect between the sealing structure and the ground after the sealing structure is turned over will be weakened.

[0004] Therefore, it is necessary to provide a sealing structure for a no-threshold air defense door to solve the above technical problems. SUMMARY

[0005] The purpose of the present application is to provide a sealing structure for a no-threshold air defense door to solve the problem that the existing turnover type sealing structure is relatively fixed in position relative to the door leaf, and when there is an error in the installation height of the door leaf or the ground subsides, the sealing effect between the sealing structure and the ground after the sealing structure is turned over will be weakened.

[0006] Based on the above idea, the present application provides the following technical scheme: a sealing structure for a no-threshold air defense door, comprising: a sealing plate, which is arranged on one side of the door leaf and can be translated along the height direction of the door leaf or turned over relative to the door leaf about an axis parallel to the width direction of the door leaf; a connecting block fixed to the sealing plate; a sliding block arranged on one side of the door leaf and hinged to the connecting block, the sliding block being configured to be able to slide along the height direction of the door leaf relative to the door leaf; a limiting assembly arranged on the sliding block, the limiting assembly being configured to be able to lock the sliding block with the door leaf or lock the sliding block with the connecting block, when the limiting assembly contacts the ground, the limiting assembly can lock the sliding block on one side of the door leaf to make the sealing plate turn over downward relative to the door leaf.

[0007] As a further solution of the present invention: The limiting component includes a positioning bar that penetrates through the slider and is elastically connected to the slider. The positioning bar is configured to be able to detect the distance between the sealing plate and the ground, so that after the sealing plate is turned down to a horizontal state, it can be pressed tightly on the ground. A clamping bar is provided on the slider for locking the slider to the door leaf, and a plug rod is provided for locking the slider to the connecting block.

[0008] As a further solution of the present invention: A clamping groove matching with the clamping bar is provided on the door leaf, and a slot matching with the plug rod is provided on the connecting block. When the positioning bar contacts the ground and is upwardly extruded so that the positioning bar moves relative to the slider, the clamping bar cooperates with the clamping groove and the plug rod disengages from the slot.

[0009] As a further solution of the present invention: Two notch openings are provided on one side surface of the positioning bar away from the connecting block, and the bottoms of the two notch openings are respectively marked as the extrusion part and the guiding part.

[0010] As a further solution of the present invention: One end of the clamping bar extends into the notch opening and cooperates with the inclined guiding part. The plug rod is fixed on one side of a square plate with a "return" - shaped structure. The square plate is elastically matched with the slider. A ejector rod is fixedly arranged on the inner wall of the square plate, and the end of the ejector rod extends into the notch opening and cooperates with the inclined extrusion part.

[0011] As a further solution of the present invention: A screw rod is provided on one side of the door leaf. A screw sleeve is threadedly connected to the outer side of the screw rod, and a support rod is hinged between the screw sleeve and the sealing plate.

[0012] As a further solution of the present invention: A boss is fixedly arranged at the position near the sealing plate and at the bottom of the door leaf, and a channel for the positioning bar to pass through is provided on the boss.

[0013] As a further solution of the present invention: A guide rail that slidably cooperates with the slider is fixedly arranged on the door leaf, and the clamping groove is opened at the bottom surface of the guide rail.

[0014] As a further solution of the present invention: A pin shaft is fixedly arranged on the connecting block, and the connecting block is rotationally matched with the slider through the pin shaft.

[0015] As a further solution of the present invention: One end of the connecting block close to the plug rod is an arc surface, and the slot is opened at the arc surface.

[0016] Compared with the prior art, the beneficial effect of the present application is that, compared with the traditional no-threshold civil air defense door, if there is an error in the height of the door leaf from the ground or the ground is pressed and sinks during installation, the distance between the sealing plate and the ground will change, so that the sealing plate cannot achieve the best sealing effect with the ground after being turned over. However, the sealing plate in the present application is not completely locked with the door leaf at the beginning, but adjusts where the sealing plate is hinged with the door leaf according to the distance between the door leaf and the ground to achieve the best sealing state between the sealing plate and the ground. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present application will be further described below in combination with the drawings and embodiments: Figure 1 is a schematic diagram of the overall structure of the present application; Figure 2 is a schematic diagram of the overall structure of the present application; Figure 3 is a schematic diagram of the connection structure of the sealing plate and the door leaf of the present application; Figure 4 is a schematic diagram of the present application in which the supporting rod pushes the sealing plate to translate downward; Figure 5 is a schematic diagram of the present application in which the supporting rod pushes the sealing plate to the horizontal state; Figure 6 is a sectional view of the sliding block and the connecting block of the present application; Figure 7 is an enlarged structural schematic diagram of A of the present application; Figure 3 is an enlarged structural schematic diagram of B of the present application; Figure 8 Figure 6 is an enlarged structural schematic diagram of C of the present application; Figure 9 is an enlarged structural schematic diagram of C of the present application; Figure 6 is a schematic diagram of the cooperation of the top rod and the positioning strip of the present application; Figure 10 is a schematic diagram of the clamping groove structure of the present application. Figure 11 In the drawings: 1, door leaf; 101, boss; 2, door frame; 3, sealing plate; 301, connecting block; 3011, insertion groove; 4, locking assembly; 5, guide rail; 501, clamping groove; 6, horizontal rod; 7, screw rod; 8, screw sleeve; 9, supporting rod; 10, driving bevel gear; 11, positioning strip; 1101, protruding block; 1102, extrusion part; 1103, guide part; 12, sliding block; 13, square plate; 1301, top rod; 1302, insertion rod; 14, clamping strip; 15, rotating wheel.

[0018] DETAILED DESCRIPTION As

[0019] Figures 1-11 ​​As shown, a sealing structure for a no-threshold civil air defense door, comprising a door frame 2 and a door leaf 1 hinged to the door frame 2 or the wall surface, and a sealing strip arranged on the opposite side of the door leaf 1 and the door frame 2 to achieve high sealing between the door leaf 1 and the door frame 2. When the civil air defense door has a threshold, the sealing strip can be a "hui" type structure to achieve sealing between the door leaf 1 and the door frame 2. For the no-threshold civil air defense door, the sealing strip is generally in a U-shaped structure, and the sealing between the door leaf 1 and the ground needs to be separately sealed. The present scheme improves the sealing structure between the no-threshold civil air defense door and the ground, and the specific implementation is as follows: A sealing plate 3 is arranged on one side of the door leaf 1, and the sealing plate 3 can be selectively slidably matched or hingedly matched with the door leaf 1, so that the sealing plate 3 can be tightly attached to the ground after being turned down to the horizontal state at any height above the ground, thereby achieving high sealing between the door leaf 1 and the ground.

[0020] A sliding block 12 is slidably assembled on the side of the door leaf 1 close to the sealing plate 3, and a connecting block 301 is fixedly installed on the side of the sealing plate 3 close to the door leaf 1, the connecting block 301 is hinged with the sliding block 12, and a limiting assembly is arranged on the sliding block 12, the limiting assembly is configured to lock the sliding block 12 with the door leaf 1 or lock the sliding block 12 with the connecting block 301, and through different locking states of the limiting assembly, the sealing plate 3 can be kept at a specific angle relative to the door leaf 1 and slide downward or the sealing plate 3 is kept at a specific position relative to the door leaf 1 and turn downward; Initially, the limiting assembly locks the sliding block 12 with the connecting block 301, so that the sealing plate 3 keeps the initial angle relative to the door leaf 1 and moves downward, when the limiting assembly is pressed and moves to the ground, the limiting assembly unlocks the sliding block 12 with the connecting block 301 and locks the sliding block 12 with the door leaf 1, in this case, during the process of pushing the sealing plate 3 downward, the sealing plate 3 can be deflected downward and tightly pressed between the door leaf 1 and the ground, thereby achieving sealing between the door leaf 1 and the ground.

[0021] The limiting assembly comprises a positioning strip 11 penetrating through the sliding block 12, and the positioning strip 11 is configured to sense the distance between the sealing plate 3 and the ground, so that the sealing plate 3 can be tightly pressed on the ground after being turned down to the horizontal state; A clamping strip 14 is arranged on the sliding block 12 to lock the sliding block 12 with the door leaf 1, and a plug rod 1302 is arranged on the sliding block 12 to lock the sliding block 12 with the connecting block 301; Further, the door leaf 1 is provided with a clamping groove 501 matched with the clamping strip 14, and the connecting block 301 is provided with an insertion groove 3011 matched with the insertion rod 1302. When the bottom end of the positioning strip 11 is in contact with the ground and is pressed upward to move the positioning strip 11 relative to the sliding block 12, the clamping strip 14 is matched with the clamping groove 501, and one end of the insertion rod 1302 is separated from the insertion groove 3011.

[0022] In summary, when it is necessary to seal the space between the door leaf 1 and the ground by the sealing plate 3, the sealing plate 3 can be driven to move downward. Initially, the clamping strip 14 is disengaged from the door leaf 1, and one end of the insertion rod 1302 is inserted into the insertion groove 3011, so that the connecting block 301 can be locked with the sliding block 12. In this state, the sealing plate 3 is translated downward relative to the door leaf 1. When the positioning strip 11 contacts the ground and moves upward relative to the sliding block 12, the clamping strip 14 can be pushed to move toward the door leaf 1 to enable the connecting block 301 to be clamped with the door leaf 1, and the insertion rod 1302 can be pushed to move away from the connecting block 301 to unlock the sliding block 12 from the connecting block 301. In this case, the sealing plate 3 can be flipped downward together with the connecting block 301 relative to the sliding block 12 during the process of pushing the sealing plate 3 downward. Specifically, when the sealing plate 3 is flipped to a horizontal state, the bottom of the sealing plate 3 can be tightly attached to the ground, and the side of the sealing plate 3 can be pressed against one side of the door leaf 1, so as to seal the space between the door leaf 1 and the ground. Therefore, compared with the conventional civil defense door without a threshold, if there is an error in the height of the door leaf 1 from the ground or the ground is depressed and sinks during installation, the distance between the sealing plate 3 and the ground will change, so that the sealing plate 3 cannot achieve the best sealing effect with the ground after being flipped. However, in the present scheme, the sealing plate 3 is not completely locked with the door leaf 1 initially, but adjusts where the sealing plate 3 is hinged with the door leaf 1 according to the distance between the door leaf 1 and the ground to achieve the best sealing state between the sealing plate 3 and the ground.

[0023] In combination Figures 3-11As shown, the door leaf 1 is provided with a screw rod 7 on the side close to the sealing plate 3, specifically, the upper half of the screw rod 7 is in a light rod structure and the screw rod 7 is rotatably connected with the sleeve fixed on one side of the door leaf 1 through a bearing, the screw thread of the screw rod 7 is engaged with a screw sleeve 8, the screw sleeve 8 is slidably connected with the door leaf 1, a supporting rod 9 is hingedly connected between the screw sleeve 8 and the sealing plate 3, specifically, the bottom end surface of the screw sleeve 8 and the top surface of the sealing plate 3 are both fixedly provided with a hinged seat, and the two ends of the supporting rod 9 are respectively hingedly connected with the hinged seats, through this structure, when the connecting block 301 is locked with the sliding block 12, in the process of rotating the screw rod 7 and moving the screw sleeve 8 downward, the sealing plate 3 can be pushed to move downward on one side of the door leaf 1 through the supporting rod 9, and when the sliding block 12 is locked with the door leaf 1, in the process of moving the screw sleeve 8 and the supporting rod 9 downward, the sealing plate 3 can be turned downward through the supporting rod 9.

[0024] In order to drive the screw rod 7 to rotate, a connecting shaft is rotatably installed on the door leaf 1, a rotating wheel 15 is fixedly installed on the end of the connecting shaft, a cross rod 6 is arranged between the top end of the screw rod 7 and the connecting shaft, specifically, the cross rod 6 is rotatably connected with the rod sleeve fixed on the side of the door leaf 1 through a bearing, and the two ends of the cross rod 6 are both fixedly provided with bevel gears, a driving bevel gear 10 is fixedly arranged on the connecting shaft and engaged with the bevel gear on one end of the cross rod 6, and the top end of the screw rod 7 is fixedly provided with a driven bevel gear engaged with the bevel gear on the other end of the cross rod 6, in actual use, rotating the rotating wheel 15 can drive the screw rods 7 on both sides to rotate, so as to synchronously move the supporting rods 9 on both sides downward.

[0025] In combination Figure 2 As shown, the door leaf 1 is provided with a locking assembly 4 for locking the door leaf 1 with the door frame 2, the locking assembly 4 can be arranged on the side of the door leaf 1 or on the top and bottom positions of the door leaf 1, a multi-link mechanism is used to drive the lock head in the locking assembly 4 to move to lock the door leaf 1 with the door frame 2, since it is a common structure in civil air defense doors, the specific structure of the locking assembly 4 will not be described here.

[0026] In combination Figures 4-5 As shown, a boss 101 is fixedly arranged on the side of the door leaf 1 close to the sealing plate 3 and at the bottom position, and the boss 101 is provided with a passage for the positioning strip 11 to pass through, Figure 4 It shows the state that the sealing plate 3 keeps a certain angle and the supporting rod 9 pushes the sealing plate 3 to move downward, Figure 5 It shows the schematic view that the supporting rod 9 pushes the sealing plate 3 to turn downward to the horizontal state, at this time, the bottom of the sealing plate 3 is in contact with the ground, and the side of the sealing plate 3 is in close contact with the boss 101, so as to avoid the interference between the sealing plate 3 and the positioning strip 11, it should be noted that the positions where the sealing plate 3 contacts with the ground, the boss 101 and the door frame 2 are all fixedly provided with sealing strips or sealing pads.

[0027] Combined Figures 6-11 As shown, in actual use, multiple groups of clamping grooves 501 matching with the clamping strip 14 can be arranged on the side of the door leaf 1. However, considering the stability of the overall structure of the door leaf 1, in this solution, a guide rail 5 slidably matched with the slider 12 is fixedly arranged on the door leaf 1. Specifically, the slider 12 is of a T-shaped structure as a whole, so that the slider 12 can stably slide in the T-shaped groove on the guide rail 5, thereby preventing the slider 12 from separating from the guide rail 5, and the clamping groove 501 is opened at the bottom surface of the inner cavity of the guide rail 5. A chute for the positioning strip 11 to pass through is opened on the slider 12. On the side surface of the positioning strip 11 away from the connecting block 301, two slots are sequentially opened along the length direction of the positioning strip 11, and the bottoms of the two slots are respectively marked as the pressing part 1102 and the guiding part 1103. A stepped groove for installing the clamping strip 14 is opened on the slider 12, and the stepped groove is communicated with the chute. Refer to Figure 8 As shown, a spring is fixedly arranged between the baffle fixed on the clamping strip 14 and the end of the stepped groove, so as to realize the elastic cooperation between the clamping strip 14 and the slider 12. From Figure 8 it can be seen that one end of the clamping strip 14 extends into the slot and cooperates with the inclined guiding part 1103, and the other end of the clamping strip 14 cooperates with the clamping groove 501. When the positioning strip 11 moves upward relative to the slider 12, the pressure of the guiding part 1103 on the clamping strip 14 can drive one end of the clamping strip 14 to insert into the clamping groove 501. It should be noted that the cross section of the clamping groove 501 can be triangular or rectangular, etc.; The inserting rod 1302 is fixed on one side of the square plate 13 of the "return" - shaped structure, and a receiving groove for installing the square plate 13 and communicated with the chute is opened on the slider 12. The inserting rod 1302 is slidably matched with the receiving groove, and a limiting spring is fixedly arranged between the square plate 13 and the end of the receiving groove to realize the elastic cooperation between the square plate 13 and the slider 12. Refer to Figure 9 As shown, a ejector rod 1301 is fixedly arranged on the inner wall of the square plate 13. The end of the ejector rod 1301 extends into the slot and cooperates with the inclined pressing part 1102. A pin shaft is fixedly arranged on the connecting block 301, and the connecting block 301 is rotationally matched with the slider 12 through the pin shaft. The end of the connecting block 301 close to the inserting rod 1302 is an arc surface, and the inserting slot 3011 is opened on the arc surface. When the positioning strip 11 moves upward relative to the slider 12, the pressure of the pressing part 1102 on the ejector rod 1301 can drive the square plate 13 to move away from the connecting block 301, so as to promote the separation of the inserting rod 1302 from the inserting slot 3011.

[0028] When the positioning strip 11 is in contact with the ground and moves upward so that the guide portion 1103 is matched with the insertion strip and the extrusion portion 1102 is matched with the top rod 1301, the sliding block 12 can be locked with the door leaf 1 and disengaged from the connecting block 301, so that the supporting rod 9 can push the sealing plate 3 to deflect downward. Through the structure, the distance between the door leaf 1 and the ground can be sensed. Only when the positioning strip 11 is in contact with the ground, the sealing plate 3 can be turned downward, so that the sealing plate 3 can be closely attached to the ground to improve the sealing effect between the door leaf 1 and the ground.

[0029] In combination Figures 6-7 As shown, the outer side of the positioning strip 11 is fixedly provided with a protrusion 1101, and the sliding block 12 is provided with a guide groove in communication with the sliding groove. The protrusion 1101 slides in the guide groove, and the top fixed vertical shaft of the protrusion 1101 penetrates through the sliding block 12 and is in sliding cooperation with the sliding block 12. An elastic member is arranged between the protrusion 1101 and the top wall of the guide groove. The elastic member can be a spring to realize the elastic cooperation between the positioning strip 11 and the sliding block 12.

[0030] The above only discloses the preferred examples of the present application, which is convenient for those skilled in the art to understand and implement, but cannot limit the scope of the present application. Therefore, equivalent changes within the scope of the present application are still covered by the present application.

Claims

1. A sealing structure for a thresholdless air-raid shelter door, characterized in that, Comprising: A sealing plate (3), which is arranged on one side of the door leaf (1) and can translate relative to the door leaf (1) along the height direction of the door leaf (1) or flip relative to the door leaf (1) about an axis parallel to the width direction of the door leaf (1); A connecting block (301), which is fixed on the sealing plate (3); A slider (12), which is arranged on one side of the door leaf (1) and is hinged to the connecting block (301), and the slider (12) is configured to be able to slide relative to the door leaf (1) along the height direction of the door leaf (1); A limit component, which is arranged on the slider (12), and the limit component is configured to be able to lock the slider (12) with the door leaf (1) or lock the slider (12) with the connecting block (301). After the limit component contacts the ground, the limit component can lock the slider (12) on one side of the door leaf (1) so that the sealing plate (3) flips downward relative to the door leaf (1).

2. The sealing structure for a thresholdless air-raid shelter door according to claim 1, characterized in that: The limit component includes a positioning strip (11) that penetrates through the slider (12) and is elastically connected to the slider (12). The positioning strip (11) is configured to be able to detect the distance between the sealing plate (3) and the ground, so that after the sealing plate (3) flips down to a horizontal state, it can be pressed tightly on the ground. A clamping strip (14) is arranged on the slider (12) for locking the slider (12) with the door leaf (1), and a plug rod (1302) is used for locking the slider (12) with the connecting block (301).

3. A sealing structure for a thresholdless air-raid shelter door according to claim 2, characterized in that: A card slot (501) matching with the clamping strip (14) is arranged on the door leaf (1), and a slot (3011) matching with the plug rod (1302) is arranged on the connecting block (301). When the positioning strip (11) contacts the ground and is upwardly extruded, causing the positioning strip (11) to move relative to the slider (12), the clamping strip (14) cooperates with the card slot (501) and the plug rod (1302) is disengaged from the slot (3011).

4. A sealing structure for a thresholdless air-raid shelter door according to claim 3, characterized in that: Two notch openings are provided on one side surface of the positioning strip (11) far from the connecting block (301), and the bottoms of the two notch openings are respectively marked as an extrusion part (1102) and a guiding part (1103).

5. A sealing structure for a thresholdless air-raid shelter door according to claim 4, characterized in that: One end of the clamping strip (14) extends into the notch opening and cooperates with the inclined guiding part (1103). The plug rod (1302) is fixed on one side of a square plate (13) with a "return" - shaped structure. The square plate (13) is elastically matched with the slider (12). A ejector rod (1301) is fixedly arranged at the inner wall of the square plate (13), and the end of the ejector rod (1301) extends into the notch opening and cooperates with the inclined extrusion part (1102).

6. A sealing structure for a thresholdless air-raid shelter door according to claim 1, characterized in that: A screw rod (7) is arranged on one side of the door leaf (1), and a screw sleeve (8) is threadedly connected to the outer side of the screw rod (7). A support rod (9) is hinged between the screw sleeve (8) and the sealing plate (3).

7. A sealing structure for a thresholdless air-raid shelter door according to claim 2, characterized in that: A boss (101) is fixedly arranged at a position near the sealing plate (3) and at the bottom of the door leaf (1), and a channel for the positioning strip (1) to pass through is arranged on the boss (101).

8. A sealing structure for a thresholdless air-raid shelter door according to claim 3, characterized in that: The door leaf (1) is fixedly provided with a guide rail (5) that slides with the slider (12), and the slot (501) is opened at the bottom surface of the guide rail (5).

9. A sealing structure for a thresholdless air-raid shelter door according to claim 1, characterized in that: A pin is fixedly provided on the connecting block (301), and the connecting block (301) rotates with the slider (12) through the pin.

10. A sealing structure for a thresholdless air-raid shelter door according to claim 3, characterized in that: The end of the connecting block (301) near the insert rod (1302) is an arc surface, and the slot (3011) is opened at the arc surface.

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