A sealing structure for a no-threshold civil air defense door

Abstract

The application discloses a sealing structure for a no-threshold civil air defense door and belongs to the technical field of civil air defense door sealing structures. The sealing structure comprises a sealing plate, which is arranged on one side of a door leaf and can be translated along the height direction of the door leaf or be flipped relative to the door leaf along an axis parallel to the width direction of the door leaf; a connecting block, which is fixed to the sealing plate; and a sliding block, which is arranged on one side of the door leaf and is hinged to the connecting block. The sliding block is configured to be able to slide along the height direction of the door leaf relative to the door leaf. When a limiting assembly is lowered to the ground and is pressed, the limiting assembly realizes unlocking of the sliding block and the connecting block and locking of the sliding block and the door leaf. In this case, in the process of pushing the sealing plate downward, the sealing plate can be deflected downward and be pressed tightly between the door leaf and the ground, so that the sealing between the door leaf and the ground is realized.

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 vehicle passing, wheelchair / mortar moving, and is particularly not suitable 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, so as to retain the protection ability of the air defense door and realize barrier-free access in normal 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:

[0007] 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;

[0008] a connecting block fixed on the sealing plate;

[0009] 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;

[0010] The limiting component is arranged on the slider and is configured to lock the slider to the door leaf or lock the slider to the connecting block. After the limiting component contacts the ground, the limiting component can lock the slider on one side of the door leaf so that the sealing plate can be turned downwards relative to the door leaf.

[0011] As a further solution of the present invention: The limiting component includes a positioning bar penetrating through the slider and elastically connected to the slider. The positioning bar is configured to detect the distance between the sealing plate and the ground, so that after the sealing plate is turned down to the horizontal state, it can be pressed against the ground. A clamping bar is arranged on the slider for locking the slider to the door leaf, and a plug rod is used for locking the slider to the connecting block.

[0012] As a further solution of the present invention: A clamping groove cooperating with the clamping bar is arranged on the door leaf, and a slot cooperating with the plug rod is arranged 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.

[0013] 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 an extrusion part and a guiding part.

[0014] 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 top rod is fixedly arranged on the inner wall of the square plate, and the end of the top rod extends into the notch opening and cooperates with the inclined extrusion part.

[0015] As a further solution of the present invention: A screw rod is arranged on one side of the door leaf, and a screw sleeve is threadedly connected to the outer side of the screw rod. A support rod is hinged between the screw sleeve and the sealing plate.

[0016] 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.

[0017] As a further solution of the present invention: A guide rail slidably matched with the slider is fixedly arranged on the door leaf, and the clamping groove is opened at the bottom surface of the guide rail.

[0018] 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.

[0019] 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.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: Compared with traditional thresholdless air-raid shelter doors, during the installation process, if there is an error in the height of the door leaf from the ground or the ground sinks due to pressure, the distance between the sealing plate and the ground will change. As a result, the sealing plate cannot achieve the best sealing effect with the ground after it is flipped. In this solution, the sealing plate is not completely locked with the door leaf at the beginning, but the distance between the door leaf and the ground is adjusted to determine where the sealing plate is hinged to the door leaf to achieve the best sealing state between the sealing plate and the ground. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a three-dimensional structural schematic diagram of the present invention;

[0024] Figure 3 This is a schematic diagram of the connection structure between the sealing plate and the door leaf of the present invention;

[0025] Figure 4 This is a schematic diagram of the support rod pushing the sealing plate downwards according to the present invention;

[0026] Figure 5 This is a schematic diagram of the support rod of the present invention pushing the sealing plate to a horizontal state;

[0027] Figure 6 This is a cross-sectional view of the slider and connecting block of the present invention;

[0028] Figure 7 This is the present invention. Figure 3 A magnified structural diagram at point A;

[0029] Figure 8 This is the present invention. Figure 6 A magnified structural diagram at point B;

[0030] Figure 9 This is the present invention. Figure 6 A magnified structural diagram at point C;

[0031] Figure 10 This is a schematic diagram of the fit between the top rod and the positioning strip of the present invention;

[0032] Figure 11 This is a schematic diagram of the card slot structure of the present invention.

[0033] In the diagram: 1. Door leaf; 101. Boss; 2. Door frame; 3. Sealing plate; 301. Connecting block; 3011. Slot; 4. Locking assembly; 5. Guide rail; 501. Slot; 6. Crossbar; 7. Screw; 8. Screw sleeve; 9. Support rod; 10. Drive bevel gear; 11. Positioning strip; 1101. Protrusion; 1102. Extrusion part; 1103. Guide part; 12. Slider; 13. Square plate; 1301. Top rod; 1302. Insert rod; 14. Locking strip; 15. Rotary wheel. Detailed Implementation

[0034] like Figures 1-11 As shown, a sealing structure for a thresholdless air-raid shelter door includes a door frame 2 and a door leaf 1 hinged to the door frame 2 or a wall. Sealing strips are arranged on the opposite sides of the door leaf 1 and the door frame 2 to achieve a high seal between the door frame 2 and the door leaf 1. When the air-raid shelter door has a threshold, the sealing strip can be a U-shaped structure to achieve a seal between the door leaf 1 and the door frame 2. However, for thresholdless air-raid shelter doors, the sealing strip is generally a U-shaped structure. In this case, a separate seal is needed between the door leaf 1 and the ground. This solution improves the sealing structure between the thresholdless air-raid shelter door and the ground. Specific embodiments are as follows:

[0035] A sealing plate 3 is provided on one side of the door leaf 1. The sealing plate 3 can be selectively slidably engaged or hingedly engaged with the door leaf 1, so that the sealing plate 3 can be flipped down to a horizontal state and tightly attached to the ground at any height above the ground, thereby achieving a high degree of sealing between the door leaf 1 and the ground.

[0036] A slider 12 is slidably mounted on the side of the door leaf 1 near the sealing plate 3, and a connecting block 301 is fixedly mounted on the side of the sealing plate 3 near the door leaf 1. The connecting block 301 is hinged to the slider 12. A limit component is provided on the slider 12. The limit component is configured to lock the slider 12 to the door leaf 1 or lock the slider 12 to the connecting block 301. Through different locking states of the limit component, the sealing plate 3 can maintain a specific angle and slide downward relative to the door leaf 1 or the sealing plate 3 can maintain a specific position relative to the door leaf 1 and flip downward.

[0037] Initially, the limiting component locks the slider 12 and the connecting block 301, so that the sealing plate 3 maintains its initial angle and moves downward relative to the door leaf 1. When the limiting component moves down to the ground and is squeezed, the limiting component unlocks the slider 12 and the connecting block 301 and locks the slider 12 and the door leaf 1. In this case, during the downward pushing of the sealing plate 3, the sealing plate 3 can deflect downward and press against the door leaf 1 and the ground, thereby achieving a seal between the door leaf 1 and the ground.

[0038] The limiting component includes a positioning strip 11 that passes through the slider 12. 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 pressed against the ground after it is flipped down to a horizontal state.

[0039] The slider 12 is provided with a locking strip 14 for locking the slider 12 to the door leaf 1, and a plug rod 1302 for locking the slider 12 to the connecting block 301;

[0040] Furthermore, the door leaf 1 is provided with a slot 501 that cooperates with the locking strip 14, and the connecting block 301 is provided with a slot 3011 that cooperates with the insert rod 1302. When the bottom end of the positioning strip 11 contacts the ground and is pressed upward, causing the positioning strip 11 to move relative to the slider 12, the locking strip 14 cooperates with the slot 501 and one end of the insert rod 1302 disengages from the slot 3011.

[0041] In summary, when it is necessary to seal the door leaf 1 with the ground using the sealing plate 3, the sealing plate 3 can be moved downwards. Initially, the locking strip 14 disengages from the door leaf 1, and one end of the insert rod 1302 is inserted into the slot 3011, allowing the connecting block 301 to lock with the slider 12. In this state, the sealing plate 3 moves downwards relative to the door leaf 1. When the positioning strip 11 contacts the ground and moves upwards relative to the slider 12, it can push the locking strip 14 towards the door leaf 1 to achieve the connection. Block 301 engages with the door leaf 1, and pushes the insertion rod 1302 away from the connecting block 301 to unlock the slider 12 from the connecting block 301. In this case, during the downward pushing of the sealing plate 3, the sealing plate 3, together with the connecting block 301, can flip downward relative to the slider 12. Specifically, when the sealing plate 3 flips to a horizontal state, the bottom of the sealing plate 3 can fit tightly against the ground, and the side of the sealing plate 3 can press against one side of the door leaf 1, thereby sealing the door leaf 1 with the ground. Therefore, compared with traditional thresholdless blast doors, if there is an error in the height of the door leaf 1 from the ground or the ground sinks due to pressure 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 flipping. In this solution, the sealing plate 3 is not completely locked with the door leaf 1 at the beginning, but the distance between the sealing plate 3 and the door leaf 1 is adjusted 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.

[0042] Combination Figures 3-11As shown, a screw 7 is provided on the side of the door leaf 1 near the sealing plate 3. Specifically, the upper part of the screw 7 is a smooth rod structure, and the screw 7 and the sleeve fixed on one side of the door leaf 1 are rotatably engaged through a bearing. A threaded sleeve 8 is engaged at the thread of the screw 7, and the threaded sleeve 8 is slidably engaged with the door leaf 1. A support rod 9 is hinged between the threaded sleeve 8 and the sealing plate 3. Specifically, a hinge seat is fixedly installed on the bottom end face of the threaded sleeve 8 and the top surface of the sealing plate 3, and the two ends of the support rod 9 are respectively hinged to the hinge seat. With this structure, when the connecting block 301 and the slider 12 are locked, as the screw 7 rotates and drives the threaded sleeve 8 to move downward, the support rod 9 can push the sealing plate 3 to move downward on one side of the door leaf 1. When the slider 12 and the door leaf 1 are locked, as the threaded sleeve 8 drives the support rod 9 to move downward, the support rod 9 can cause the sealing plate 3 to flip downward.

[0043] To drive the screw 7 to rotate, a connecting shaft is rotatably installed on the door leaf 1. A rotating wheel 15 is fixedly installed at the end of the connecting shaft. A crossbar 6 is provided between the top of the screw 7 and the connecting shaft. Specifically, the crossbar 6 and the rod sleeve fixed on the side of the door leaf 1 are rotatably engaged by bearings. Both ends of the crossbar 6 are fixedly provided with bevel gears. A driving bevel gear 10 that meshes with the bevel gear at one end of the crossbar 6 is fixedly sleeved on the connecting shaft. A driven bevel gear that meshes with the bevel gear at the other end of the crossbar 6 is fixedly provided at the top of the screw 7. In actual use, rotating the rotating wheel 15 can drive the screws 7 on both sides to rotate, thereby causing the support rods 9 on both sides to move downward synchronously.

[0044] Combination Figure 2 As shown, the door leaf 1 is provided with a locking assembly 4 for locking the door leaf 1 to 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 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 to the door frame 2. Since it is a common structure in air defense doors, the specific structure of the locking assembly 4 will not be described in detail here.

[0045] Combination Figures 4-5 As shown, a boss 101 is fixedly provided on the side of the door leaf 1 near the sealing plate 3 and at the bottom, and the boss 101 is provided with a channel for the positioning strip 11 to pass through. Figure 4 This demonstrates the state where the sealing plate 3 is held at a specific angle while the support rod 9 pushes the sealing plate 3 downwards. Figure 5 This shows a schematic diagram of the support rod 9 pushing the sealing plate 3 downward to a horizontal state. At this time, the bottom of the sealing plate 3 is in contact with the ground, while the side of the sealing plate 3 is in close contact with the boss 101, thereby avoiding interference between the sealing plate 3 and the positioning strip 11. It should be noted that sealing strips or sealing gaskets are fixed at the positions where the sealing plate 3 contacts the ground, the sealing plate 3 contacts the boss 101, and the sealing plate 3 contacts the door frame 2.

[0046] Combined with Figures 6-11 As shown, in actual use, multiple groups of card slots 501 that cooperate with the card strip 14 can be provided 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 that slidably cooperates with the slider 12 is fixedly provided 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 detaching from the guide rail 5, and the card slot 501 is opened at the bottom surface of the inner cavity of the guide rail 5. A chute through which the positioning strip 11 passes is opened on the slider 12. On one side surface of the positioning strip 11 away from the connecting block 301, two slots are successively opened along the length direction of the positioning strip 11, and the bottoms of the two slots are respectively marked as the extrusion part 1102 and the guiding part 1103. A stepped groove for installing the card strip 14 is opened on the slider 12, and the stepped groove is communicated with the chute. Referring to Figure 8 As shown, a spring is fixedly provided between the baffle fixed on the card strip 14 and the end of the stepped groove, so as to realize the elastic cooperation between the card strip 14 and the slider 12. From Figure 8 It can be seen that one end of the card strip 14 extends into the slot and cooperates with the inclined guiding part 1103, and the other end of the card strip 14 cooperates with the card slot 501. When the positioning strip 11 moves upward relative to the slider 12, the pressure of the guiding part 1103 on the card strip 14 can drive one end of the card strip 14 to insert into the card slot 501. It should be noted that the cross-section of the card slot 501 can be triangular or rectangular, etc.;

[0047] The insertion 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 insertion rod 1302 is slidably fitted with the receiving groove, and a limiting spring is fixedly provided 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. Referring to Figure 9 As shown, a ejector rod 1301 is fixedly provided 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 extrusion part 1102. A pin shaft is fixedly provided on the connecting block 301. The connecting block 301 is rotationally fitted with the slider 12 through the pin shaft, and one end of the connecting block 301 close to the insertion rod 1302 is an arc surface, and the insertion slot 3011 is opened on the arc surface. When the positioning strip 11 moves upward relative to the slider 12, the pressure of the extrusion part 1102 on the ejector rod 1301 can drive the square plate 13 to move away from the connecting block 301, so as to cause the insertion rod 1302 to separate from the insertion slot 3011.

[0048] In summary, when the positioning strip 11 contacts the ground and moves upward, causing the guide part 1103 to engage with the insert strip and the pressing part 1102 to engage with the top rod 1301, the slider 12 can lock with the door leaf 1 and disengage from the connecting block 301. As a result, the support rod 9 can push the sealing plate 3 to deflect downward. This structure allows the distance between the door leaf 1 and the ground to be sensed. Only when the positioning strip 11 contacts the ground can the sealing plate 3 be flipped downward, so that the sealing plate 3 can be tightly attached to the ground to improve the sealing effect between the door leaf 1 and the ground.

[0049] Combination Figures 6-7 As shown, a protrusion 1101 is fixedly provided on the outer side of the positioning strip 11, and a guide groove communicating with the slide groove is provided on the slider 12. The protrusion 1101 slides in the guide groove, and the vertical shaft fixed at the top of the protrusion 1101 passes through the slider 12 and slides with it. An elastic element is provided between the protrusion 1101 and the top wall of the guide groove. The elastic element can be a spring to realize the elastic cooperation between the positioning strip 11 and the slider 12.

[0050] The above-disclosed examples are merely preferred embodiments of this application, intended to facilitate understanding and implementation by those skilled in the art. However, they cannot be used to limit the scope of this application. Therefore, equivalent variations made within the scope of this application are still within the scope of this 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). The sealing plate (3) can translate relative to the door leaf (1) along the height direction of the door leaf (1) and can 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). 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 limiting component, which is arranged on the slider (12). The limiting component is configured to be able to lock the slider (12) to the door leaf (1) or lock the slider (12) to the connecting block (301). After the limiting component contacts the ground, the limiting 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); The limiting 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) to the door leaf (1), and a plug rod (1302) is used for locking the slider (12) to the connecting block (301); A clamping groove (501) that is matched with the clamping strip (14) is arranged on the door leaf (1), and a slot (3011) that is matched with the plug rod (1302) is arranged on the connecting block (301). When the positioning strip (11) contacts the ground and is upwardly squeezed so that the positioning strip (11) moves relative to the slider (12), the clamping strip (14) cooperates with the clamping groove (501) and the plug rod (1302) is disengaged from the slot (3011).

2. The sealing structure for a thresholdless air-raid shelter door according to claim 1, characterized in that: Two notch openings are provided on one side surface of the positioning strip (11) away 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).

3. A sealing structure for a thresholdless air-raid shelter door according to claim 2, 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). The end of the ejector rod (1301) extends into the notch opening and cooperates with the inclined extrusion part (1102).

4. The 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). A screw sleeve (8) is threadedly connected to the outer side of the screw rod (7), and a support rod (9) is hinged between the screw sleeve (8) and the sealing plate (3).

5. A sealing structure for a thresholdless air-raid shelter door according to claim 1, 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 (11) to pass through is provided on the boss (101).

6. A sealing structure for a thresholdless air-raid shelter door according to claim 1, 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).

7. 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.

8. A sealing structure for a thresholdless air-raid shelter door according to claim 1, 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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