Bottom sealing device for threshold-free protective air-tight door

Abstract

The invention discloses a bottom sealing device for a threshold-free protective airtight door, and belongs to the technical field of civil defense door sealing, the bottom sealing device comprises a door frame and a door leaf hinged to one side of the door frame, a sealing plate is arranged on one side of the door leaf, and a sliding piece is arranged on the side, close to the sealing plate, of the door leaf; the sliding piece moves in the height direction of the door leaf, and a connecting rod is hinged between the sliding piece and the sealing plate. When the sealing plate is folded to be in the vertical state, the sealing piece assembled on the surface of the sealing plate can be reliably limited in the closed space between the sealing plate and the door leaf, on one hand, external dust and sundries can be effectively prevented from invading, and the sealing piece is prevented from being polluted; on the other hand, all-directional protection can be formed on the sealing piece, and collision caused by external force and erosion caused by environmental media are reduced; therefore, when the sealing plate is unfolded to a horizontal state and is attached to the ground, the sealing piece can fully exert stable and reliable sealing performance.

Description

Technical Field

[0001] This invention relates to the field of air defense door sealing technology, and in particular to a bottom sealing device for a thresholdless protective airtight door. Background Technology

[0002] Threshold-free protective airtight doors, as key equipment in civil defense projects, effectively solve the problem of obstructing the passage of people and vehicles caused by traditional threshold-type civil defense doors due to their structural advantage of having no fixed threshold. They have been widely used in places with high demand for barrier-free passage, such as hospitals, parking lots, shopping malls, and subways. They not only meet the requirements of convenient personnel evacuation and equipment transportation in peacetime, but also play a protective airtight function in wartime or emergency situations.

[0003] Chinese patent CN121088282A discloses a sealing structure for a thresholdless air-raid shelter door. When the limiting component moves down to the ground and is squeezed, the limiting component unlocks the slider from the connecting block and locks the slider to the door leaf. In this case, during the downward pushing of the sealing plate, the sealing plate can deflect downward and press against the door leaf and the ground, thereby achieving a seal between the door leaf and the ground.

[0004] The aforementioned sealing device employs a structural design where the sealing plate is deflected away from the door leaf and pressed against the ground to achieve a seal at the bottom of the door leaf. However, this approach has the following drawbacks: First, the seal needs to be installed on the side of the sealing plate away from the door leaf, causing the seal to be directly exposed to the external environment. This results in long-term exposure to dust and debris accumulation, external impacts, and erosion from humid and corrosive media, which accelerates the aging and deterioration of the seal, leading to a continuous decline in sealing performance. Second, damage and performance degradation of the seal directly affect the sealing effect at the bottom of the door leaf, reducing the reliability of the thresholdless protective airtight door.

[0005] Therefore, it is necessary to provide a bottom sealing device for a thresholdless protective airtight door to solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to provide a bottom sealing device for a thresholdless protective airtight door, so as to solve the technical problems mentioned in the background art.

[0007] Based on the above ideas, the present invention provides the following technical solution: a bottom sealing device for a thresholdless protective airtight door, including a door frame and a door leaf hinged to one side of the door frame, a sealing plate is provided on one side of the door leaf, a sliding member is provided on the side of the door leaf near the sealing plate, the sliding member moves along the height of the door leaf and a connecting rod is hinged between the sliding member and the sealing plate. The hinge position between the connecting rod and the sealing plate is located on the side of the sealing plate away from the door leaf. This allows the sliding member to slide downwards along the height direction of the door leaf, while the connecting rod drives the sealing plate to deflect towards the door leaf, so that the side of the sealing plate closer to the door leaf can be in contact with the ground.

[0008] As a further aspect of the present invention: the sealing element on the sealing plate is located between the sealing plate and the door leaf.

[0009] As a further aspect of the present invention: a protrusion is installed on the side of the sealing plate away from the door leaf, and a pin installed on the protrusion passes through the connecting rod and is rotatably connected to the connecting rod. The sealing plate is elastically engaged with the connecting rod along the circumferential direction of the pin, so that the sealing plate can deflect towards the side closer to the door leaf.

[0010] As a further aspect of the present invention: a positioning element is provided on the side of the door leaf near the sealing plate. Initially, the sealing plate remains vertical and is located between the positioning element and the door leaf. During the process of the connecting rod driving the sealing plate to move downward along the height direction of the door leaf so that the door leaf and the positioning element are misaligned, the sealing plate can deflect towards the side of the door leaf under the elastic force and finally adhere to the ground under the pressure of the connecting rod.

[0011] As a further aspect of the present invention: a positioning element is provided on the side of the door leaf near the sealing plate. Initially, the sealing plate remains vertical and is located between the positioning element and the door leaf. During the process of the connecting rod driving the sealing plate to move downward along the height direction of the door leaf so that the door leaf and the positioning element are misaligned, the sealing plate can deflect towards the side of the door leaf under the elastic force and finally adhere to the ground under the pressure of the connecting rod.

[0012] As a further aspect of the present invention: the positioning component includes two vertical sections, specifically a guide section and a positioning section, and the guide section protrudes outward relative to the positioning section. During the process of the connecting rod driving the sealing plate to move upward, the outwardly protruding guide section can contact the side of the sealing plate away from the door leaf. The torque applied to the sealing plate by the guide section enables the sealing plate to rotate around the pin during the process of the connecting rod driving the sealing plate to move upward, thereby providing conditions for the door leaf to be inserted between the positioning section and the door leaf.

[0013] As a further aspect of the present invention: a U-shaped dust cover is fixedly installed on the side of the door leaf near the sealing plate, and when the sealing plate is in a vertical state, the sealing plate is located inside the dust cover.

[0014] As a further aspect of the present invention: the positioning element is fixed to the dust cover.

[0015] As a further aspect of the present invention: a collar is coaxially sleeved at the pin shaft, and the collar is fixed to the connecting rod; a torsion spring is sleeved at the pin shaft, and the two ends of the torsion spring are respectively connected to the pin shaft and the collar.

[0016] As a further aspect of the present invention: the door leaf is provided with a locking mechanism for locking the door leaf to the door frame, and the locking mechanism is arranged on one or both sides of the door leaf.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: when the sealing plate is folded to a vertical state, the sealing element mounted on its surface can be reliably confined within the closed space between the sealing plate and the door leaf. On the one hand, it can effectively isolate external dust and debris from intrusion and prevent the sealing element from being contaminated. On the other hand, it can provide all-round protection for the sealing element, reducing external impacts and environmental erosion. Thus, it ensures that when the sealing plate is unfolded to a horizontal state and in contact with the ground, the sealing element can fully exert its stable and reliable sealing performance. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the drive component structure of the present invention; Figure 3 This is a schematic diagram of the screw and sliding component of the present invention. Figure 4 This is a schematic diagram of the sealing plate of the present invention in its initial state; Figure 5 This is a three-dimensional structural diagram of the sealing plate deflecting and abutting against the stop member of the present invention; Figure 6 This is a schematic diagram of the planar structure of the sealing plate deflecting and abutting against the stop member according to the present invention; Figure 7 This is a schematic diagram of the sealing plate of the present invention being attached to the ground; Figure 8 This is a schematic diagram of the cooperation between the sliding member and the limiting member of the present invention.

[0020] In the diagram: 1. Door frame; 101. First side wall; 102. Second side wall; 103. Stop; 2. Door leaf; 3. Locking mechanism; 4. Handwheel; 5. Drive rod; 6. Screw; 7. Connecting rod; 8. Dust cover; 9. Sealing plate; 901. Protrusion; 902. Sealing element; 10. Positioning element; 1001. Guide part; 1002. Positioning part; 11. Pin; 12. Collar; 13. Limiting element; 14. Sliding element; 15. Elastic element; 16. Rotating shaft. Detailed Implementation

[0021] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0022] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0023] like Figures 1-8 As shown, a bottom sealing device for a thresholdless protective airtight door is mainly used in hospitals and parking lots. The sealing effect is achieved by the sealing strip around the door leaf 2 cooperating with the door frame 1. It is used for emergency protection during wartime or daily protection during peacetime.

[0024] Compared to traditional air-raid shelter doors, threshold-free air-raid shelter doors do not have fixed thresholds, thus facilitating the rapid passage of vehicles and personnel. Figure 1 As shown, in this solution, a sealing plate 9 is provided on the side of the door leaf 2 near the door frame 1 and near the bottom. The sealing plate 9 is used to seal the bottom of the door leaf 2.

[0025] Furthermore, a sliding member 14 is provided on the side of the door leaf 2 near the sealing plate 9, and the sliding member 14 can move along the height direction of the door leaf 2 (i.e. Figure 1 The sliding member 14 moves in the direction Z) and a connecting rod 7 is hinged between the sliding member 14 and the sealing plate 9, so that when the sliding member 14 slides along the height direction of the door leaf 2, it can drive the sealing plate 9 to deflect downward and fit against the ground, which is beneficial to sealing the bottom of the door leaf 2.

[0026] Specifically, the pin fixed to the sliding member 14 passes through the connecting rod 7 and rotates with the connecting rod 7. At least one protrusion 901 is fixedly installed on the outer side of the sealing plate 9. A pin 11 is fixedly provided on the protrusion 901. The pin 11 passes through the connecting rod 7 and rotates with the connecting rod 7.

[0027] Combination Figures 1-2As shown, the hinge position between the connecting rod 7 and the sealing plate 9 is located on the side of the sealing plate 9 away from the door leaf 2. This allows the sliding member 14 to slide downwards along the height direction of the door leaf 2, while the connecting rod 7 drives the sealing plate 9 to deflect towards the door leaf 2, so that the side of the sealing plate 9 closest to the door leaf 2 can be in contact with the ground. Through the above structural design, when the sealing plate 9 is folded to a vertical state, the sealing member 902 mounted on its surface can be reliably confined within the closed space between the sealing plate 9 and the door leaf 2. On the one hand, it can effectively isolate external dust and debris from intrusion, preventing the sealing member 902 from being contaminated; on the other hand, it can provide all-round protection for the sealing member 902, reducing external impacts and environmental erosion. Thus, it ensures that when the sealing plate 9 is unfolded to a horizontal state and in contact with the ground, the sealing member 902 can fully exert its stable and reliable sealing performance.

[0028] Combination Figures 2-3 As shown, the sealing plate 9 is elastically engaged with the connecting rod 7 along the circumferential direction of the pin 11, which facilitates the deflection of the sealing plate 9 toward the side closer to the door leaf 2.

[0029] A positioning element 10 is provided on the side of the door leaf 2 near the sealing plate 9, as shown in the figure. Figures 1-2 As shown, initially, the sealing plate 9 remains vertical and is positioned between the positioning member 10 and the door leaf 2. As the connecting rod 7 drives the sealing plate 9 to move downward along the height direction of the door leaf 2, causing the door leaf 2 to gradually shift away from the positioning member 10, the sealing plate 9 can deflect inward (i.e., towards the side closer to the door leaf 2) under elastic force, which helps the side of the sealing plate 9 closer to the door leaf 2 to adhere to the ground.

[0030] A plate-shaped stop 103 is fixed to the inner wall of the door frame 1 near the bottom. Figures 5-6 As shown, when the sealing plate 9 moves downward and is misaligned with the positioning member 10, the sealing plate 9 is tilted due to the elastic force, and the bottom side edge of the sealing plate 9 can abut against the inner area of ​​the stop member 103. At this time, as the connecting rod 7 continues to move downward, the sealing plate 9 can be gradually pushed towards the ground and eventually the bottom side edge of the sealing plate 9 contacts the ground. For details, please refer to... Figure 6 As shown; When the sealing plate 9 contacts the ground at an angle and the connecting rod 7 continuously applies downward pressure to the sealing plate 9, the sealing plate 9 can be gradually pressed between the stop member 103 and the door leaf 2, as detailed in the following figure. Figure 7 As shown, during this process, the side of the sealing plate 9 that was originally close to the door leaf 2 can be in close contact with the ground, while the top of the sealing plate 9 can be in close contact with the side of the door leaf 2, which is conducive to effectively sealing the bottom of the door leaf 2.

[0031] Compared to the conventional structure where the sealing plate 9 is deflected away from the door leaf 2 and lands on the ground, this design deflects the sealing plate 9 towards the door leaf 2, allowing the seal 902 located between the sealing plate 9 and the door leaf 2 to form a protective state isolated from the outside environment. This design effectively reduces the impact of external impacts, dust, and corrosive media on the seal 902, significantly improving its service life and reliability, and ensuring that the seal 902 can effectively seal the bottom of the door leaf 2 in the event of an emergency.

[0032] To drive the sealing plate 9 to move along the height of the door leaf 2, a drive assembly is provided on the side of the door leaf 2 near the door frame 1. Figures 1-5 As shown, the drive assembly includes a handwheel 4 and a drive rod 5 that is pulsatorically connected to the handwheel 4. The screw 6 that is threadedly connected to the sliding member 14 is pulsatorically connected to the drive rod 5, so that rotating the handwheel 4 can drive the screw 6 to rotate, thereby driving the sliding member 14 to slide along the height direction of the door leaf 2.

[0033] Specifically, the handwheel 4 is rotatably connected to the door leaf 2 via a rotating shaft 16, and the drive rod 5 is located between the rotating shaft 16 and the screw 6. Both ends of the drive rod 5 are fixedly equipped with first bevel gears. Correspondingly, a second bevel gear meshing with the first bevel gear is fixedly sleeved on the rotating shaft 16, while a third bevel gear meshing with the first bevel gear is fixedly installed at the top of the screw 6. Through the transmission of the gear set, the handwheel 4 can drive the screw 6 to rotate during rotation, thereby controlling the movement of the sealing plate 9.

[0034] Multiple sets of support members are arranged on one side of the door leaf 2, at the drive rod 5 and the screw 6. The drive rod 5 and the screw 6 can be rotatably engaged with the support members through bearings. It should be noted that the part of the screw 6 that engages with the support member is set as a smooth rod structure, which is conducive to the rotational engagement between the screw 6 and the support member.

[0035] Combination Figures 2-3 , Figure 8 As shown, a U-shaped limiting member 13 is fixedly installed on one side of the door leaf 2, and one end of the sliding member 14 slides within the limiting member 13, from... Figure 2 As can be seen, the bottom of the limiting member 13 is provided with a protrusion, and the bottom end of the screw 6 is rotatably engaged with the protrusion, which helps the screw 6 to stably drive the sliding member 14 to move along the height direction of the door leaf 2.

[0036] Reference Figures 1-2 , Figure 5 , Figure 8As shown, except for the bottom surface and the side facing away from the door leaf 2, the sealing plate 9 is provided with sealing elements 902 on all other surfaces. A U-shaped dust cover 8 is fixedly installed on the side of the door leaf 2 near the sealing plate 9. When the sealing plate 9 is in the initial state, the sealing plate 9 is located inside the dust cover 8, so that the sealing element 902 can contact the dust cover 8 and the door leaf 2, thereby helping to isolate the sealing element 902 from the external environment.

[0037] Furthermore, the aforementioned positioning element 10 can be fixed to the dust cover 8. (Combined) Figures 1-2 As shown, the positioning member 10 includes two vertical sections, specifically a guide section 1001 and a positioning section 1002, with the guide section 1001 protruding outward relative to the positioning section 1002. With this structure, when the connecting rod 7 drives the sealing plate 9 to move upward along the height direction of the door leaf 2, the outwardly protruding guide section 1001 can contact the area of ​​the sealing plate 9 away from the door leaf 2 and located outside the protrusion 901. The directional torque applied to the sealing plate 9 by the guide section 1001 causes the sealing plate 9 to rotate around the pin 11, thereby forming a tendency to fit against the door leaf 2. When the sealing plate 9 moves between the positioning section 1002 and the door leaf 2 and completes the fitting, the sealing plate 9 can fit against the door leaf 2, thus helping to keep the sealing plate 9 in a vertical state.

[0038] The inner wall of the door frame 1 in the vertical direction is denoted as follows: Figure 1 The diagram shows a first sidewall 101 and a second sidewall 102, with the second sidewall 102 protruding outward relative to the first sidewall 101. Initially, the sealing plate 9 is vertical and aligned with the first sidewall 101. It should be noted that the length of the dust cover 8 is less than the width of the door frame 1 at the first sidewall 101, allowing the dust cover 8 to enter the door frame 1 when the door leaf 2 is closed. It is understood that as the sealing plate 9 moves downward and adheres to the ground, it enters the area of ​​the second sidewall 102 on the door frame 1, and the sealing element 902 on the sealing plate 9 can contact the second sidewall 102 on the door frame 1, thereby further sealing the bottom of the door leaf 2.

[0039] Combination Figures 2-3 As shown, a collar 12 is coaxially sleeved at the pin 11, and the collar 12 is fixed to the connecting rod 7. Further, an elastic element 15 is sleeved at the pin 11. The elastic element 15 can be a torsion spring, and the two ends of the torsion spring are respectively connected to the pin 11 and the collar 12, so that the sealing plate 9 and the connecting rod 7 are elastically fitted along the circumferential direction of the pin 11.

[0040] like Figure 1As shown, a locking mechanism 3 for locking the door leaf 2 to the door frame 1 is provided at the door leaf 2. The locking mechanism 3 is arranged on one or both sides of the door leaf 2. A multi-link mechanism is used to drive the lock head in the locking mechanism 3 to move to lock the door leaf 2 to the door frame 1. Since this is a commonly used technical means in air defense doors, the specific structure of the locking mechanism 3 will not be described in detail here.

[0041] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A bottom sealing device for a thresholdless protective airtight door, comprising a door frame (1) and a door leaf (2) hinged to one side of the door frame (1), wherein a sealing plate (9) is provided on one side of the door leaf (2), characterized in that: The door leaf (2) is provided with a sliding member (14) on the side near the sealing plate (9). The sliding member (14) moves along the height of the door leaf (2) and a connecting rod (7) is hinged between the sliding member (14) and the sealing plate (9). The hinge position of the connecting rod (7) and the sealing plate (9) is located on the side of the sealing plate (9) away from the door leaf (2), so that when the sliding member (14) slides down along the height direction of the door leaf (2), the connecting rod (7) can drive the sealing plate (9) to deflect towards the door leaf (2), so that the side of the sealing plate (9) close to the door leaf (2) can be in contact with the ground.

2. The bottom sealing device for a thresholdless protective airtight door according to claim 1, characterized in that: The sealing element (902) on the sealing plate (9) is located between the sealing plate (9) and the door leaf (2).

3. The bottom sealing device for a thresholdless protective airtight door according to claim 1, characterized in that: The sealing plate (9) has a protrusion (901) installed on the side away from the door leaf (2). The pin (11) installed on the protrusion (901) passes through the connecting rod (7) and is rotatably connected to the connecting rod (7). The sealing plate (9) is elastically engaged with the connecting rod (7) along the circumferential direction of the pin (11), so that the sealing plate (9) can deflect towards the side closer to the door leaf (2).

4. The bottom sealing device for a thresholdless protective airtight door according to claim 3, characterized in that: The door leaf (2) is provided with a positioning element (10) on the side near the sealing plate (9). Initially, the sealing plate (9) is kept vertical and is located between the positioning element (10) and the door leaf (2). During the process of the connecting rod (7) driving the sealing plate (9) to move downward along the height direction of the door leaf (2) so that the door leaf (2) and the positioning element (10) are misaligned, the sealing plate (9) can deflect towards the side of the door leaf (2) under the elastic force and finally stick to the ground under the pressure of the connecting rod (7).

5. The bottom sealing device for a thresholdless protective airtight door according to claim 4, characterized in that: A plate-shaped stop (103) is fixed to the inner wall of the door frame (1). When the sealing plate (9) moves downward and is misaligned with the positioning member (10), the sealing plate (9) is tilted due to the influence of elastic force and the bottom side edge of the sealing plate (9) can abut against the inner area of ​​the stop (103).

6. The bottom sealing device for a thresholdless protective airtight door according to claim 4, characterized in that: The positioning component (10) includes two vertical sections, specifically a guide section (1001) and a positioning section (1002). The guide section (1001) protrudes outward relative to the positioning section (1002). During the process of the connecting rod (7) driving the sealing plate (9) to move upward, the outwardly protruding guide section (1001) can contact the side of the sealing plate (9) away from the door leaf (2). The torque applied to the sealing plate (9) by the guide section (1001) allows the sealing plate (9) to rotate around the pin (11) during the process of the connecting rod (7) driving the sealing plate (9) to move upward, thereby providing conditions for the door leaf (2) to be inserted between the positioning section (1002) and the door leaf (2).

7. The bottom sealing device for a thresholdless protective airtight door according to claim 4, characterized in that: A U-shaped dust cover (8) is fixedly installed on the side of the door leaf (2) near the sealing plate (9). When the sealing plate (9) is in a vertical state, the sealing plate (9) is located inside the dust cover (8).

8. The bottom sealing device for a thresholdless protective airtight door according to claim 7, characterized in that: The positioning element (10) is fixed to the dust cover (8).

9. A bottom sealing device for a thresholdless protective airtight door according to claim 3, characterized in that: A collar (12) is coaxially sleeved at the pin (11), and the collar (12) is fixed to the connecting rod (7). A torsion spring is sleeved at the pin (11), and the two ends of the torsion spring are respectively connected to the pin (11) and the collar (12).

10. A bottom sealing device for a thresholdless protective airtight door according to claim 1, characterized in that: The door leaf (2) is provided with a locking mechanism (3) for locking the door leaf (2) to the door frame (1). The locking mechanism (3) is arranged on one or both sides of the door leaf (2).

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