Spring balanced quick opening and closing door for underground space flood prevention

Abstract

The application discloses a spring balance type quick opening and closing air-tight door for underground space flood prevention, which comprises a door leaf, a door frame, a hinge and a locking system, the door frame is fixedly arranged in a wall body, the door leaf is connected with the door frame through the hinge, and the locking system is arranged on the door leaf and connected with the door frame; the locking system comprises a locking structure and a floating locking structure, the locking structure is arranged on the door leaf and connected with the door frame, and the floating locking structure is arranged on the locking structure and connected with the door leaf, and the floating locking structure is used for controlling the distance between the door leaf and the door frame. The floating locking structure is arranged on the locking structure, the floating locking structure is used for automatically adjusting the elongation length when the door leaf is closed, the uneven door frame can be automatically pressed, the door leaf can be tightly pressed with the door frame at any position, and the defect of poor sealing caused by the uneven door leaf or door frame is solved.

Description

Technical Field

[0001] This invention relates to the field of airtight door technology, specifically to a spring-balanced quick-opening and closing airtight door for flood prevention in underground spaces. Background Technology

[0002] With urbanization, underground spaces such as subways, underground commercial buildings, and civil defense projects are increasing. These spaces are located in low-lying areas and are highly susceptible to flooding during extreme weather or emergencies. Therefore, it is crucial to install reliable flood-proof airtight doors at the entrances and exits of underground spaces.

[0003] Traditional underground space protective doors mainly consist of a door frame, a heavy-duty steel or reinforced concrete door leaf, ordinary hinges, and a surrounding bolt-locking or pin-locking mechanism. These airtight doors primarily rely on manual or electric operation for opening and closing, and locking requires tightening multiple bolts or inserting a lock. In practical use, they suffer from the following drawbacks: First, they are cumbersome to open and close: the door leaf is extremely heavy and lacks balancing assistance, requiring multiple people to operate it, resulting in extremely low efficiency in emergencies. Second, locking efficiency is low: the bolt-locking method is cumbersome and time-consuming, failing to meet the "every second counts" requirement of flood control and disaster relief. Third, sealing reliability is poor: construction errors or settlement deformation often exist at the entrances of underground engineering projects, resulting in uneven door frame surfaces. Existing rigid locking mechanisms cannot adapt to these errors, easily leading to localized leaks due to insufficient locking. These shortcomings are technical problems that traditional airtight doors urgently need to solve. Summary of the Invention

[0004] This invention provides a spring-balanced quick-opening and closing airtight door for flood prevention in underground spaces. It can achieve rapid opening and closing and solves the technical problem of poor sealing caused by uneven door frame and door leaf.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: A spring-balanced quick-opening and closing airtight door for flood prevention in underground spaces includes a door leaf, a door frame, hinges, and a locking system. The door frame is fixedly installed in the wall, the door leaf is connected to the door frame via hinges, and the locking system is installed on the door leaf and connected to the door frame. The locking system includes a locking structure and a floating locking structure. The locking structure is installed on the door leaf and connected to the door frame. The floating locking structure is installed on the locking structure and connected to the door leaf. The floating locking structure is used to control the distance between the door leaf and the door frame.

[0006] Furthermore, the locking structure includes a locking arm, a locking disc, a rotating shaft, and a handle. The rotating shaft is mounted on the door leaf, the locking disc and the handle are respectively mounted at both ends of the rotating shaft, and the inner end of the locking arm is movably connected to the locking disc.

[0007] Furthermore, the floating locking structure includes a fixed seat, a floating rod, and an elastic element. The fixed seat is disposed on the door leaf, the outer end of the floating rod is connected to the locking arm, and its inner end is located in the fixed seat. The elastic element is located in the fixed seat, and both ends of the elastic element are connected to the fixed seat and the floating rod, respectively.

[0008] Furthermore, the outer end of the floating rod is provided with a through hole, and the locking arm is movably disposed in the through hole of the floating rod.

[0009] Furthermore, when the door is open, the elastic element is in a free state, and when the door is closed, the elastic element is in a stretched state.

[0010] Furthermore, the locking arms are arranged in groups, and the groups of locking arms are symmetrically arranged on the locking turntable, with the floating locking structure correspondingly arranged on the locking arms.

[0011] Furthermore, the locking turntable is an eccentric cam turntable.

[0012] Furthermore, an adjusting sleeve is provided on the floating rod, the floating rod is movably disposed in the adjusting sleeve, and the adjusting sleeve is threadedly connected to the fixed seat.

[0013] Furthermore, a torsion spring is provided in the hinge.

[0014] Furthermore, the door leaf is provided with a mating groove, and a sealing strip is provided in the mating groove.

[0015] The beneficial effects of this invention are as follows: A floating locking structure is set on the locking structure. When the door is closed, the extension length is adaptively adjusted by the floating locking structure to automatically press against the uneven door frame. This ensures that the door can be tightly pressed against the door frame at any position, thus solving the defect of poor sealing caused by uneven door or door frame. A torsion spring is installed in the hinge. When the door is closed, the torsion spring stores energy, and when the door is opened, the torsion spring releases the stored energy to assist the door in opening, thereby achieving rapid opening of the door and effectively improving the opening efficiency of the door. Attached Figure Description

[0016] Figure 1 This is a schematic cross-sectional view of the overall structure of the present invention; Figure 2 This is a schematic front view of the overall structure of the present invention; Figure 3 This is a cross-sectional schematic diagram of the floating locking structure of the present invention; Figure 4 This is a schematic diagram showing the torsion spring of the present invention in its configured state.

[0017] Reference numerals: 1. Door leaf; 2. Door frame; 3. Hinge; 31. Torsion spring; 4. Locking system; 41. Locking structure; 411. Locking arm; 412. Locking turntable; 413. Rotating shaft; 414. Handle; 42. Floating locking structure; 421. Fixed base; 422. Floating rod; 423. Elastic element; 424. Adjusting sleeve. Detailed Implementation

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0020] like Figure 1 , 2 As shown, a spring-balanced quick-opening and closing airtight door for flood prevention in underground spaces is horizontally installed at the entrance of the underground space. It includes a door leaf 1, a door frame 2, a hinge 3, and a locking system 4. The door frame 2 is fixedly installed in the wall, and the door leaf 1 is connected to the door frame 2 through the hinge 3. The locking system 4 is installed on the door leaf 1 and connected to the door frame 2.

[0021] like Figure 1 , 2 As shown, the locking system 4 includes a locking structure 41 and a floating locking structure 42. The locking structure 41 is installed on the door leaf 1 and connected to the door frame 2 to lock the door leaf 1 and the door frame 2. The floating locking structure 42 is installed on the locking structure 41 and connected to the door leaf 1. The floating locking structure 42 is located between the locking structure 41 and the door leaf 1 to adjust the distance between the locking structure 41 and the door leaf 1, thereby controlling the door leaf 1 and the door frame 2 to fit tightly together and achieve a reliable seal.

[0022] The principle of this invention is as follows: A torsion spring 31 is provided in the hinge 3. The torsion spring 31 stores energy during the closing process and releases the stored energy when the door is opened, reducing the difficulty of opening the door and improving the opening efficiency. A floating locking structure 42 is provided on the locking structure 41. When the door is open, the distance between the locking arm 411 and the door 1 is the height of the floating locking structure 42. When the door is closed, since the height of the door frame 2 is higher than the height of the floating locking structure 42, the floating locking structure 42 will be stretched under the support of the door frame 2 when the door is closed. When there is a misalignment between the door 1 and the door frame 2, the floating locking structure 42 will be stretched to different degrees, thereby floatingly compensating for the distance between the door 1 and the locking arm 411, and automatically adapting to different distances between the door 1 and the door frame 2, so that the door 1 and the door frame 2 keep tightly fitted, thereby achieving full fit and full seal between the door 1 and the door frame 2.

[0023] like Figure 1 , 2 As shown, the locking structure 41 further includes a locking arm 411, a locking turntable 412, a rotating shaft 413, and a handle 414. The rotating shaft 413 is fixedly mounted on the door leaf 1 and is perpendicular to the door leaf 1. The locking turntable 412 and the handle 414 are respectively located at the inner and outer ends of the rotating shaft 413. The inner end of the locking arm 411 is movably connected to the locking turntable 412, allowing it to swing in a plane and perpendicular to the plane. In use, rotating the handle 414 will drive the rotating shaft 413 to rotate, which in turn drives the locking turntable 412 to rotate. The locking arm 411, movably connected to the locking turntable 412, will swing and extend / retract, thereby achieving locking and unlocking of the locking arm 411.

[0024] Specifically, since the position of the floating locking structure 42 does not change, it acts as the fulcrum for the movement of the locking arm 411, restricting the movement trajectory of the locking arm 411. This results in the locking arm 411 being driven by the locking turntable 412, and its movement trajectory being a composite trajectory of axial extension and in-plane displacement. When the locking arm 411 extends axially, it will extend and retract through the through hole at the outer end of the floating rod 422. When the locking arm 411 moves in the plane, it will also drive the floating rod 422 to rotate on the fixed seat 421, thereby adapting to the change in the position of the locking arm 411.

[0025] like Figure 1 , 3As shown, the floating locking structure 42 further includes a fixed base 421, a floating rod 422, and an elastic element 423. The fixed base 421 is fixedly mounted on the door leaf 1. The outer end of the floating rod 422 is connected to the locking arm 411, and its inner end is located in the fixed base 421. The floating rod 422 can extend and retract and rotate around an axis in the fixed base 421. The elastic element 423 is located in the fixed base 421. The two ends of the elastic element 423 are fixedly connected to the fixed base 421 and the floating rod 422, respectively. Under the action of the elastic element 423, the floating rod 422 will extend different lengths in the fixed base 421 according to different pressures. When the door leaf 1 is opened, the elastic element 423 is in a normal state, i.e., a free state, and pulls the floating rod 422 to make it stably located in the fixed seat 421. When the door leaf 1 is closed and locked, as the outer end of the locking arm 411 gradually gets into the locking seat on the door frame 2, the locking arm 411 will pull the floating rod 422 to move outward from the fixed seat 421, so that the elastic element 423 is stretched and in a stretched state. When the height of the four sides of the door frame 2 is different due to the torsional deformation of the door frame 2, the extension length of the floating rod 422 is also different, thereby achieving compensation for the unevenness of the door frame.

[0026] Specifically, when the door is open, the locking arm 411 and the locking turntable 412 are movably connected. The floating locking structure 42 pulls the locking arm 411 to maintain a stable distance between it and the door 1. When the door is closed and the locking structure 41 begins to contact the door frame 2, the locking arm 411 and the door frame 2 are in hard contact. Since the outer end of the locking arm 411 is a bevel, as the locking arm 411 gradually locks, the distance between the locking arm 411 and the door 1 will gradually increase, thereby causing the floating locking structure 42 to extend. When the door frame 2 is deformed and becomes taller, the floating locking structure 42 in the corresponding area will be stretched longer. When the height of the door frame 2 is normal, the floating locking structure 42 in the corresponding area will be stretched normally. Therefore, by extending the floating locking structure 42 by different lengths, the door 1 and the door frame 2 are kept in close contact.

[0027] Furthermore, the outer end of the floating rod 422 is provided with a through hole, and the locking arm 411 is movably disposed in the through hole of the floating rod 422, and the locking arm 411 can extend and retract axially in the through hole of the floating rod 422.

[0028] Furthermore, when the door is open, the elastic element 423 is in a free state, and its length is 100mm. When the door is closed, the elastic element 423 is in a stretched state, with a preset maximum stretch of 20mm. The floating locking structure 42 can compensate for the flatness error of the door frame 2 within ±5mm. Within this error range, the door 1 and the door frame 2 can be tightly fitted by the floating of the floating locking structure 42. When the door frame 2 is normal, the elastic element 423 is stretched by 10mm. When the door frame 2 is torsional due to unevenness, the elastic element 423 can be stretched up to 15mm when the door frame 2 protrudes, and stretched down to 5mm when the door frame 2 is concave. The stretch of the elastic element 423 is not less than 5mm to meet the sealing requirements of the door 1 and the door frame 2.

[0029] Furthermore, the locking arms 411 are arranged in groups, with a total of four groups. The four groups of locking arms 411 are evenly arranged on the four sides of the door leaf 1. The groups of locking arms 411 are symmetrically arranged on the locking turntable 412. The floating locking structure 42 is correspondingly arranged on the locking arms 411.

[0030] Furthermore, the locking turntable 412 is an eccentric cam disc. When the locking turntable 412 rotates, it will drive the locking arm 411 located on it to swing and extend.

[0031] Furthermore, an adjusting sleeve 424 is provided on the floating rod 422. The floating rod 422 is movably disposed in the adjusting sleeve 424. The floating rod 422 can only rotate in the adjusting sleeve 424 and cannot move axially. The adjusting sleeve 424 is threadedly connected to the fixed seat 421. The installation depth of the adjusting sleeve 424 in the fixed seat 421 can be adjusted by rotating the adjusting sleeve 424.

[0032] Furthermore, a sealing ring is provided on the floating rod 422. The sealing ring is sleeved on the floating rod 422 and contacts the fixed seat 421. The sealing ring is used to seal the gap between the floating rod 422 and the fixed seat 421.

[0033] like Figure 1 , 2As shown in Figure 4, furthermore, a torsion spring 31 is provided in the hinge 3. The torsion spring 31 can store the energy when closing the door and release it when opening the door, improving the opening efficiency. Since the airtight door is set horizontally and opens upwards, when the door leaf 1 is closed, it is relatively easy to close the door under its own weight. However, because the door leaf is heavy, when it is closed directly, the door leaf 1 will fall directly due to its own weight, which is not only prone to accidents but also to structural damage. Moreover, when opening the door, people need to overcome the weight of the door leaf 1, which is quite strenuous. However, after setting the torsion spring 31, the door leaf 1 is lowered slowly when closing the door, avoiding accidents. At the same time, the torsion spring 31 can store energy, and the stored energy can offset 60%-80% of the weight of the door leaf when opening the door, making it easier to open the door.

[0034] Furthermore, the door leaf 1 is provided with a mating groove, and a sealing strip is provided in the mating groove. When the door leaf 1 is closed, the door frame 2 is located in the mating groove and squeezes the sealing strip to achieve a seal.

[0035] Furthermore, door leaf 1 is made of Q235 steel plate, with dimensions of 1000×2000mm and a thickness of 6mm. It is filled with fireproof and heat-insulating material, and the sealing strip is a closed sponge rubber strip that is pasted into the sealing groove.

[0036] Furthermore, the pivot 413 is a solid steel shaft with a diameter of 40mm, the locking arm 411 is made of No. 45 steel and has undergone heat treatment, the elastic element 423 is a steel spring with a free length of 100mm, a stiffness of 10N / mm, and a preset maximum elongation of 20mm.

[0037] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A spring-balanced, quick-opening and closing airtight door for flood prevention in underground spaces, characterized in that: It includes a door leaf (1), a door frame (2), a hinge (3) and a locking system (4). The door frame (2) is fixedly installed in the wall. The door leaf (1) is connected to the door frame (2) through the hinge (3). The locking system (4) is installed on the door leaf (1) and connected to the door frame (2). The locking system (4) includes a locking structure (41) and a floating locking structure (42). The locking structure (41) is installed on the door leaf (1) and connected to the door frame (2). The floating locking structure (42) is installed on the locking structure (41) and connected to the door leaf (1). The floating locking structure (42) is used to control the distance between the door leaf (1) and the door frame (2).

2. A spring-balanced quick-opening and closing airtight door for flood prevention in underground spaces according to claim 1, characterized in that: The locking structure (41) includes a locking arm (411), a locking turntable (412), a rotating shaft (413), and a handle (414). The rotating shaft (413) is mounted on the door leaf (1). The locking turntable (412) and the handle (414) are respectively mounted on both ends of the rotating shaft (413). The inner end of the locking arm (411) is movably connected to the locking turntable (412).

3. A spring-balanced quick-opening and closing airtight door for flood prevention in underground spaces according to claim 2, characterized in that: The floating locking structure (42) includes a fixed seat (421), a floating rod (422), and an elastic element (423). The fixed seat (421) is installed on the door leaf (1). The outer end of the floating rod (422) is connected to the locking arm (411), and its inner end is located in the fixed seat (421). The elastic element (423) is located in the fixed seat (421), and both ends of the elastic element (423) are connected to the fixed seat (421) and the floating rod (422) respectively.

4. A spring-balanced quick-opening and closing airtight door for flood prevention in underground spaces according to claim 3, characterized in that: The outer end of the floating rod (422) is provided with a through hole, and the locking arm (411) is movably disposed in the through hole of the floating rod (422).

5. A spring-balanced quick-opening and closing airtight door for flood prevention in underground spaces according to claim 3, characterized in that: When the door is open, the elastic element (423) is in a free state; when the door is closed, the elastic element (423) is in a stretched state.

6. A spring-balanced quick-opening and closing airtight door for flood prevention in underground spaces according to claim 2, characterized in that: The locking arms (411) are arranged in groups, and the groups of locking arms (411) are symmetrically arranged on the locking turntable (412). The floating locking structure (42) is correspondingly arranged on the locking arms (411).

7. A spring-balanced quick-opening and closing airtight door for flood prevention in underground spaces according to claim 2, characterized in that: The locking turntable (412) is an eccentric cam disc.

8. A spring-balanced quick-opening and closing airtight door for flood prevention in underground spaces according to claim 3, characterized in that: An adjusting sleeve (424) is provided on the floating rod (422), the floating rod (422) is movably disposed in the adjusting sleeve (424), and the adjusting sleeve (424) is threadedly connected to the fixed seat (421).

9. A spring-balanced quick-opening and closing airtight door for flood prevention in underground spaces according to claim 1, characterized in that: A torsion spring (31) is provided in the hinge (3).

10. A spring-balanced quick-opening and closing airtight door for flood prevention in underground spaces according to claim 1, characterized in that: The door leaf (1) is provided with a mating groove, and a sealing strip is provided in the mating groove.

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