Multifunctional sealing device and sealing method for rigid hinge structure area

Abstract

The invention discloses a multifunctional sealing device for a rigid hinge structure area and a sealing method. The device comprises a sealing brush, a flexible cover, a sealing brush fixing mechanism and a flexible cover fixing mechanism, wherein the sealing brush is installed in a circumferential gap between a small box girder of a rigid hinge structure and a steel box girder in a segmented mode, the outer surface of the top of the small box girder of the rigid hinge structure is covered with the flexible cover, the sealing brush fixing mechanism is used for fixing the sealing brush to the steel box girder, and the flexible cover fixing mechanism is used for fixing the flexible cover to the steel box girder. Wherein the sealing brush comprises a brush plate and brush wires, the brush wires are densely arranged macromolecule filaments, the density of the outer side is lower than that of the inner side, the self-sealing effect is achieved, and the special support for the rigid hinge on the surface of the small box girder can be fully wrapped by the brush wires; the flexible cover can be freely stacked and stretched to adapt to dynamic deformation of the expansion joint. A series of problems of a rigid hinge structure area can be solved, the functions of steel box girder sealing, expansion joint pollution discharge and drainage and adaptation to rigid hinge expansion deformation are achieved, the reachable, detectable and repairable maintenance requirements are considered, and the service life of the rigid hinge is prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge engineering, and more specifically, relates to a multi-functional sealing device and a sealing method for a rigid hinge structure area. Background Art

[0002] In modern bridge engineering, the use of a rigid hinge structure at the expansion joint of a steel box girder is a unique functional structure. The rigid hinge can release the longitudinal relative deformation of the two sides of the steel box girder through the small box girder and the bearing group, while restricting the relative bending, torsion and shear deformation between the two sides of the steel box girder. This structure is particularly important in long-span bridges such as cable-stayed bridges and suspension bridges, because it not only ensures the structural safety of the bridge, but also improves the driving comfort. With the increase of the service time of the bridge, under the long-term action of external loads, various structural damages will occur and accumulate in many bridges, and their bearing capacity and safety will decline. Due to its structural characteristics, the rigid hinge structure becomes a more vulnerable and sensitive position. The complexity of the rigid hinge area also brings many problems. For example, a large gap is generated at the end of the steel box girder due to the rigid hinge structure, which weakens the structural seal and is not conducive to the internal anti-corrosion of the steel box girder. Corrosion will also endanger the safety of the rigid hinge structure. At the same time, the rigid hinge structure is exposed to the natural environment and is easily affected by various natural factors such as rainfall and pollutants, increasing the corrosion and damage to the rigid hinge structure. In the prior art, there are few sealing devices for the rigid hinge structure. For example, in the patent document with the publication number CN203361006U, this utility model proposes a rigid hinge for a bridge, which restricts the deformation of the main girder by arranging two groups of bearings (including vertical bearings and lateral bearings) outside the small box girder, and uses a viscous damper to buffer the damage of temperature deformation to the bearings. In addition, this invention also provides a sealing device between the small box girder and the fixed-end box girder. Through the sealing device, the surrounding of the small box girder can be sealed to prevent rainwater and the like from entering the expansion joint, so that the small box girder is corroded and damaged. An expansion joint sealing plate is covered on the expansion joint to seal off the expansion joint and prevent sundries from falling into the expansion joint and affecting the expansion of the small box girder. However, this sealing device is a conventional device, which cannot prevent the air flow from entering the structure interior, has insufficient sealing durability, may cause sealing failure or structural damage during the bridge expansion process, and does not consider the accessibility and convenience of maintenance, increasing the later maintenance cost. Summary of the Invention

[0003] Aiming at the above defects or improvement requirements of the prior art, the present invention provides a multi-functional sealing device and a sealing method for a rigid hinge structure area. By installing a fixed sealing brush and a flexible cover in the rigid hinge structure area, a series of problems in the rigid hinge structure area are solved, and at the same time, functions such as steel box girder sealing, expansion joint sewage drainage, and adaptation to the expansion and contraction deformation of the rigid hinge are realized, and the maintenance requirements of accessibility, inspectability, and repairability are taken into account, improving the internal environment of the rigid hinge and increasing the durability of the rigid hinge.

[0004] To achieve the above object, according to the first aspect of the present invention, a multi-functional sealing device for a rigid hinge structure area is provided, including:

[0005] A sealing brush, which is installed in segments in the circumferential gap between the small box girder and the steel box girder of the rigid hinge structure;

[0006] A flexible cover, which is installed to cover the outer surface of the top of the small box girder of the rigid hinge structure;

[0007] A sealing brush fixing mechanism for fixing the sealing brush on the steel box girder;

[0008] A flexible cover fixing mechanism for fixing the flexible cover on the steel box girder;

[0009] And an intelligent sensing feedback system, which is embedded inside the sealing brush (1) and the flexible cover (2), monitors the working state in real time and feeds it back to the monitoring center, and displays the specific damaged parts;

[0010] Wherein, the sealing brush includes a brush plate and brush filaments. The brush filaments are made of densely arranged polymer filaments, and the density on the outside is lower than that on the inside, forming a self-sealing effect; the flexible cover is made of a thermoplastic elastomer reinforced with a fiber skeleton, and can freely stack and stretch to adapt to the dynamic deformation of the expansion joint.

[0011] Further, when the special rigid hinge support of the rigid hinge structure moves to the position of the sealing brush, the sealing brush fully wraps the special rigid hinge support.

[0012] Further, threaded holes are formed on the brush plate of the sealing brush; the brush filaments of the sealing brush are made of water-absorbent filaments that isolate the penetration of air humidity.

[0013] Further, in cold regions below zero degrees, an electric heating element is integrated inside the flexible cover (2).

[0014] Further, the flexible cover adapts to the outer shape arc of the small box girder and extends to protect the edge of the small box girder, and a maintenance space is formed on its upper part.

[0015] Further, the sealing brush fixing mechanism includes a first U-shaped plate and a first fixing bolt, and bolt holes are formed on the web of the first U-shaped plate.

[0016] Further, the first U-shaped plate is fixed on the steel box girder by welding or bonding, and the first fixing bolt passes through the bolt hole on the first U-shaped plate and the threaded hole on the brush plate and is tightened to fix the sealing brush on the steel box girder.

[0017] Further, the flexible cover fixing mechanism includes a second U-shaped plate and a second fixing bolt, and a bolt hole is formed in one wing plate of the second U-shaped plate.

[0018] Further, the other wing plate of the second U-shaped plate is fixed to the steel box girder by welding or bonding, and the second fixing bolt passes through the bolt hole of one wing plate to press or clamp the flexible cover on the other wing plate, thereby fixing the flexible cover to the steel box girder.

[0019] According to the second aspect of the present invention, there is provided a sealing method for a rigid hinge structure area, which is implemented by using the above-mentioned multifunctional sealing device for a rigid hinge structure area, and includes:

[0020] S100: Clean the sundries and stains in the gap between the small box girder and the steel box girder in the rigid hinge structure area and on the upper surface of the small box girder to ensure cleanliness; at the same time, check the sealing brush and the flexible cover to ensure that they are not damaged or worn to ensure the sealing performance;

[0021] S200: Fix the sealing brush along the gap between the small box girder and the steel box girder on the steel box girder in sections, and ensure that the brush filaments are densely arranged and adapted to the gap between the small box girder and the steel box girder;

[0022] S300: According to the outer shape radian of the small box girder, weld the flexible cover in sections and blocks by hot melting or ultrasonic welding and then cover it on the outer surface of the top of the small box girder, and extend the protection to the edge of the small box girder. Use the flexible cover fixing mechanism to fix the flexible cover on the steel box girder to ensure that the flexible cover can freely stack and unfold when the expansion joint deforms;

[0023] S400: Check the fixing conditions of the sealing brush and the flexible cover to ensure that they can adapt to the deformation of the rigid hinge structure, and conduct an overall function test to ensure that the sealing device can operate normally, realizing the functions of sealing the steel box girder, discharging sewage and draining water from the expansion joint, and adapting to the expansion and contraction deformation of the rigid hinge.

[0024] Generally speaking, compared with the prior art by the above technical solutions conceived by the present invention, the following beneficial effects can be achieved:

[0025] 1. The multifunctional sealing device for a rigid hinge structure area of the present invention installs a sealing brush between the gaps of the small box girder and the steel box girder of the rigid hinge structure to isolate the entry of humid air into the interior of the steel box girder, and installs a flexible cover on the outer surface of the top of the small box girder in the rigid hinge structure area to block the entry of bridge deck garbage and rainwater into the interior of the small box girder. Both the sealing brush and the flexible cover can adapt to the deformation of the expansion joint, solve a series of problems in the rigid hinge structure area, and at the same time realize functions such as sealing the steel box girder, discharging sewage and draining water from the expansion joint, and adapting to the expansion and contraction deformation of the rigid hinge, thereby prolonging the service life of the rigid hinge structure.

[0026] 2. The sealing brush of a multi-functional sealing device for a rigid hinge structure area of the present invention uses polymer brush filaments arranged densely, with a lower density on the outer side than on the inner side, forming an uneven gap, which disrupts the air flow and generates a self-sealing effect. Moreover, the brush filaments are made of water-absorbing materials such as silica gel to further isolate the penetration of air humidity. The special design of the sealing brush can effectively block the penetration of air and humidity, significantly improving the sealing performance of the steel box girder.

[0027] 3. During the deformation process of the expansion joint of a multi-functional sealing device for a rigid hinge structure area of the present invention, the sealing brush can fully wrap the special support for the rigid hinge on the surface of the small box girder, and the flexible cover can freely stack and stretch to adapt to the dynamic deformation of the expansion joint, ensuring the continuity of the device function.

[0028] 4. A multi-functional sealing device for a rigid hinge structure area of the present invention is internally embedded with an intelligent sensing and feedback system (such as a micro pressure sensor and an environmental sensor), which can monitor the working status of the sealing brush and the flexible cover and the environmental conditions in real time. Once an abnormal situation (such as sealing failure or excessive wear) is detected, the system will automatically issue an alarm and send the data to the monitoring center through wireless transmission, displaying the specific damaged part, facilitating the timely replacement and repair of the sealing brush and the flexible cover.

[0029] 5. The fixing mechanism of the sealing brush and the fixing mechanism of the flexible cover of a multi-functional sealing device for a rigid hinge structure area of the present invention both adopt a combination of U-shaped plates and bolts to fix the sealing brush and the flexible cover on the steel box girder. The bolts can be quickly fixed or disassembled, thereby realizing the installation and disassembly of the device, facilitating the later inspection, maintenance, and replacement of the device, and reducing the maintenance cost.

[0030] 6. The flexible cover of a multi-functional sealing device for a rigid hinge structure area of the present invention covers the outer surface of the small box girder, with a compact structure. A relatively large maintenance space around the rigid hinge is reserved above the flexible cover, which can be stepped on by people to inspect and repair the device, realizing the maintenance requirements of accessibility, inspectability, and reparability, and solving the problem of uninterrupted traffic maintenance of the rigid hinge and the expansion joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of a rigid hinge at the expansion joint of a steel box girder according to an embodiment of the present invention;

[0032] Figure 2 is a schematic diagram of the contraction and elongation states of a multi-functional sealing device for a rigid hinge structure area according to an embodiment of the present invention;

[0033] Figure 3 is a schematic cross-sectional structural diagram of a multi-functional sealing device for a rigid hinge structure area applied to an expansion joint according to an embodiment of the present invention;

[0034] Figure 4 Schematic longitudinal sectional view of a multi-functional sealing device for a rigid hinge structure area applied to an expansion joint in an embodiment of the present invention;

[0035] Figure 5 Schematic diagram of the self-sealing principle formed by air flow passing through the sealing brush of a multi-functional sealing device for a rigid hinge structure area in an embodiment of the present invention;

[0036] Figure 6 Process of the sealing brush of a multi-functional sealing device for a rigid hinge structure area adapting to expansion and contraction deformation in an embodiment of the present invention;

[0037] Figure 7 Schematic connection diagram (front view and side view) of the sealing brush and the sealing brush fixing mechanism of a multi-functional sealing device for a rigid hinge structure area in an embodiment of the present invention;

[0038] Figure 8 Schematic overall layout structure diagram of the flexible cover of a multi-functional sealing device for a rigid hinge structure area in an embodiment of the present invention;

[0039] Figure 9 Schematic deformation diagram of the contraction and elongation states of the flexible cover of a multi-functional sealing device for a rigid hinge structure area in an embodiment of the present invention;

[0040] Figure 10 Schematic flow diagram of a sealing method for a rigid hinge structure area in an embodiment of the present invention.

[0041] In all the drawings, the same reference numerals represent the same technical features, specifically: 1 - sealing brush; 101 - brush plate; 102 - brush wire; 2 - flexible cover; 3 - sealing brush fixing mechanism; 301 - first U-shaped plate; 302 - first fixing bolt; 4 - flexible cover fixing mechanism; 401 - second U-shaped plate; 402 - second fixing bolt; 5 - small box girder; 6 - steel box girder; 7 - expansion joint; 8 - special rigid hinge support; 9 - maintenance space; 10 - air flow; 11 - low-density area; 12 - high-density area. Detailed implementation manners

[0042] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0043] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, then such directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture (as shown in the attached drawings). If this specific posture changes, then the directional indications will also change accordingly. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0044] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0045] In the present invention, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article or device. Without further limitation, the elements defined by the statement "including..." do not exclude the existence of additional identical elements in the process, method, article or device including the said elements.

[0046] As Figure 1 shown in the schematic diagram of the rigid hinge of the expansion joint of a long-span multi-tower cable-stayed bridge in an embodiment of the present invention, in this embodiment, two rigid hinges of the small box girder are configured. The rigid hinge structure includes the small box girder 5, the steel box girder 6, and the special rigid hinge support 8 installed outside the small box girder 5. One end of the small box girder 5 is fixed inside the fixed-end steel box girder 6, and the other end of the small box girder 5 is sleeved inside the sliding-end steel box girder 6 and can move freely along the axis direction of the sliding-end steel box girder 6 relative to the special rigid hinge support 8. As shown in the figure, there are gaps formed around the small box girder 5 and the steel box girder 6.

[0047] As Figures 2 - 4 shown, an embodiment of the present invention provides a multi-functional sealing device for the rigid hinge structure area, including a sealing brush 1, a flexible cover 2, a sealing brush fixing mechanism 3, a flexible cover fixing mechanism 4, and an intelligent induction feedback system.

[0048] The sealing brush 1 is installed in the gap between the small box girder 5 of the rigid hinge structure and the steel box girder 6, and is fixed on the steel box girder 1 through the sealing brush fixing mechanism 3; the flexible cover 2 is installed and covers the outer surface of the top of the small box girder 5, is fixed on the steel box girder 6 through the flexible cover fixing mechanism 4 and fits the contour arc of the small box girder 5, and a maintenance space 9 is formed above the flexible cover 2. In the embodiment of the present invention, by installing a sealing brush in the gap between the small box girder of the rigid hinge structure and the steel box girder to isolate the entry of humid air into the interior of the steel box girder, and by installing a flexible cover on the outer surface of the upper part of the small box girder in the expansion joint area to block bridge deck garbage and rainwater from entering the rigid hinge interior, while guiding the smooth discharge of water flow, reducing the impact of water accumulation on the structure, and both can adapt to the deformation of the expansion joint, simultaneously realizing functions such as the sealing of the steel box girder, the sewage discharge and drainage of the expansion joint, and the telescopic deformation of the rigid hinge, and taking into account the maintenance requirements of accessibility, inspectability, and repairability, improving the internal environment of the rigid hinge and increasing the durability of the rigid hinge.

[0049] Among them, the sealing brush 1 is circumferentially fixed on the steel box girder 6 in sections through the sealing brush fixing mechanism 3 in the gap between the small box girder 5 and the steel box girder 6, and it includes a brush plate 101 and brush filaments 102. Threaded holes are provided on the brush plate 101. The brush filaments 102 are made of densely arranged high-molecular filaments, and the density of the outer side is lower than that of the inner side, so as to produce a self-sealing effect. As Figure 5 It is a schematic diagram of the self-sealing principle formed by air flow passing through the sealing brush. The brush filament bundle is divided into a low-density area 11 and a high-density area 12. Due to the non-uniformity of the gaps between the brush filaments 102, and the inner side of the brush filament bundle is the high-density area and the outer side is the low-density area, the air flow 10 becomes disordered when entering the brush filament bundle, the air flow 10 is disrupted, forming a transverse flow, causing resistance to the air flow, generating a self-sealing effect, increasing the total pressure drop across the sealing brush 1, and thus reducing the air leakage amount. Therefore, by using a sealing brush 1 made of densely arranged high-molecular filaments with a lower density on the outer side than on the inner side, the air flow on both sides of the sealing brush 1 can be effectively blocked, and a certain pressure difference can be borne to realize the air isolation on both sides of the sealing brush 1. And the brush filaments 102 of the sealing brush 1 are made of water-absorbing filaments such as silica gel, which can play a role in isolating the humidity penetration of the air on both sides of the sealing brush 1. At the same time, the sealing brush 1 can also adapt to the special rigid hinge support 8 on the surface of the small box girder 5 of the rigid hinge structure. When the expansion joint deforms, when the special rigid hinge support 8 moves to the position of the sealing brush 1, the sealing brush 1 can fully wrap the special rigid hinge support 8, so that during the deformation process of the expansion joint, on the one hand, it does not affect the movement of the small box girder 5 of the rigid hinge, and on the other hand, it can ensure the air isolation inside and outside during the deformation process of the expansion joint 7. As Figure 6 shown, it is a schematic diagram of the sealing brush adapting to the deformation process of the expansion joint. Through the above special design of the sealing brush, the sealing of the steel box girder 6 is realized during the deformation process of the expansion joint.

[0050] As Figure 7As shown, the sealing brush fixing mechanism 3 includes a first U-shaped plate 301 and a first fixing bolt 302, whose material is the same as that of the bridge, ensuring the same service life as the bridge. The first U-shaped plate 301 is fixed on the steel box girder 6 by welding or bonding. There are bolt holes on its web. After the first fixing bolt 302 passes through the bolt holes on the first U-shaped plate 301 and the threaded holes on the brush plate 101 and is tightened, the sealing brush 1 is fixed on the steel box girder 6. Loosen the first fixing bolt 302, and the sealing brush 1 can be disassembled, thus realizing the installation and disassembly of the sealing brush, which is convenient for the later maintenance, repair and replacement of the device.

[0051] As Figure 2 , Figure 3 and Figure 8 shown, the flexible cover 2 is installed and covers the outer surface of the top of the small box girder 5, adapting to the arc of the small box girder 5 and extending to protect the edge of the small box girder 5. Its two end parts in the longitudinal direction of the bridge deck are fixed on the steel box girder 6 by the flexible cover fixing mechanism 4, and a maintenance space 9 is formed above the flexible cover 2.

[0052] The flexible cover 2 is a multi-layer structure, made of a thermoplastic elastomer reinforced with a fiber skeleton, having good weather resistance, corrosion resistance, flame retardancy, wear resistance and mechanical properties, which is convenient for the flexible cover fixing mechanism 4 to clamp or press. For cold regions below zero degrees, electric heating elements can be integrated inside the flexible cover 2. This heating system can be automatically started and stopped according to the ambient temperature, saving energy, quickly melting the ice and snow accumulated on the upper part, and preventing the ice and snow accumulation from affecting its telescopic performance.

[0053] The flexible cover 3 receives the dirt and rainwater falling from the expansion joint 7, protects the small box girder 5 from damage, and a maintenance space 9 is formed at the upper end of the flexible cover 3, which can be stepped on by people, facilitating the maintenance, cleaning and loading and unloading of the flexible cover 3. The flexible cover 3 can also be freely stacked and unfolded. It can be freely stacked in the contracted state of the expansion joint and has good self-standing property. When the expansion joint extends, it can be freely unfolded and has good followability. As Figure 9 is a schematic diagram of the deformation of the flexible cover when the expansion joint is shortened and extended.

[0054] The flexible cover fixing mechanism 4 includes a second U-shaped plate 401 and a second fixing bolt 402, the materials of which are the same as those of the bridge, so as to maintain the same service life as the bridge. One side wing plate of the second U-shaped plate 401 is fixed on the steel box girder 6 by welding or bonding, and bolt holes are provided on the other side wing plate. The second fixing bolt 402 passes through the bolt holes on one side wing plate to press or clamp the flexible cover 2 on the other side wing plate, and fixes the flexible cover 3 on the steel box girder 6. When the second fixing bolt 402 is loosened, the flexible cover 3 can be disassembled, so as to realize the installation and disassembly of the flexible cover, which is convenient for the later maintenance, repair and replacement of the device.

[0055] An intelligent sensing and feedback system (such as a micro pressure sensor and an environmental sensor) is embedded in the sealing brush 1 and the flexible cover 2 to monitor the working state and environmental conditions of the sealing brush 1 and the flexible cover 2 in real time. Once an abnormal situation (such as seal failure or excessive wear) is detected, the system will automatically issue an alarm and send the data to the monitoring center through wireless transmission, and display the specific damaged part through the human-computer interaction interface, which is convenient for timely replacement and repair of the sealing brush 1 and the flexible cover 2.

[0056] The device of the present invention solves a series of problems in the rigid hinge structure area through the sealing brush and the flexible cover, and improves the durability of the rigid hinge.

[0057] As Figure 10 shown, in another embodiment of the present invention, a sealing method for the rigid hinge structure area is provided, which is realized by applying the above-mentioned multifunctional sealing device for the rigid hinge structure area, and includes:

[0058] S100: Clean the sundries, stains, etc. in the rigid hinge structure area, especially the gaps between the small box girder and the steel box girder and the upper surface of the small box girder, to ensure the cleanliness. At the same time, check the sealing brush and the flexible cover to ensure that they are not damaged or worn to ensure the sealing performance.

[0059] S200: Fix the sealing brush on the steel box girder in sections along the gap between the small box girder and the steel box girder, ensure that the brush filaments are densely arranged and adapt to the gap between the small box girder and the steel box girder. At the same time, the brush filaments of the sealing brush adopt high molecular filaments with a lower density on the outer side than on the inner side to produce a self-sealing effect, effectively blocking air flow and humidity penetration.

[0060] S300: According to the shape radian of the small box girder, the flexible cover is welded in sections and blocks by hot melting or ultrasonic welding and then covered on the outer surface of the top of the small box girder, and extends to protect the edge of the small box girder. The flexible cover fixing mechanism is used to fix the flexible cover on the steel box girder to ensure that the flexible cover can freely stack and stretch when the expansion joint deforms.

[0061] S400: Inspect the sealing device, check the fixation of the sealing brush and the flexible cover to ensure that they can adapt to the deformation of the rigid hinge structure, and conduct an overall function test to ensure that the sealing device can operate normally, realizing functions such as the sealing of the steel box girder, sewage drainage of the expansion joint, and telescopic deformation of the rigid hinge, and meeting the maintenance requirements of accessibility, inspectability, and repairability.

[0062] Those skilled in the art can easily understand that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A multifunctional sealing device for a rigid hinge structure area, characterized in that: include: Sealing brushes (1) are installed in sections in the circumferential gap between the small box beam (5) and the steel box beam (6) of the rigid hinge structure; A flexible cover (2) is installed to cover the top outer surface of the small box beam (5) of the rigid hinge structure; A sealing brush fixing mechanism (3) used for fixing the sealing brush (1) on the steel box girder (6); A flexible cover fixing mechanism (4) used for fixing the flexible cover (2) on the steel box girder (6); and an intelligent sensing feedback system, which is embedded in the sealing brush (1) and the flexible cover (2), monitors the working status in real time, feeds back to the monitoring center, and displays the specific damaged parts; The sealing brush (1) comprises a brush plate (101) and brush filaments (102); the brush filaments (102) are made of densely arranged polymer filaments, with the outer side having a lower density than the inner side, thereby forming a self-sealing effect; the flexible cover (2) is made of a thermoplastic elastomer reinforced with a fiber skeleton, which can be freely stacked and stretched to adapt to the dynamic deformation of the expansion joint (7).

2. A multifunctional sealing device for a rigid hinge structure area according to claim 1, characterized in that: When the rigid hinge dedicated support (8) of the rigid hinge structure moves to the position of the sealing brush (1), the sealing brush (1) fully wraps the rigid hinge dedicated support (8).

3. A multifunctional sealing device for a rigid hinge structure area according to claim 2, characterized in that: The brush plate (101) of the sealing brush (1) is provided with a threaded hole; the brush filaments (102) of the sealing brush (1) are water-absorbent filaments that isolate air humidity from penetrating.

4. A multifunctional sealing device for a rigid hinge structure area according to any one of claims 1 to 3, characterized in that: In cold areas below zero degrees, an electric heating element is integrated inside the flexible cover (2).

5. A multifunctional sealing device for a rigid hinge structure area according to claim 4, characterized in that: The flexible cover (2) adapts to the curvature of the outer shape of the small box beam (5) and extends to protect the edge of the small box beam (5), and an inspection space (9) is formed on the upper part thereof.

6. A multifunctional sealing device for a rigid hinge structure area according to any one of claims 1 to 3, characterized in that: The sealing brush fixing mechanism (3) comprises a first U-shaped plate (301) and a first fixing bolt (302), wherein a bolt hole is provided on the web of the first U-shaped plate (301).

7. A multifunctional sealing device for a rigid hinge structure area according to claim 6, characterized in that: The first U-shaped plate (301) is fixed to the steel box girder (6) by welding or bonding, and the first fixing bolt (302) is passed through the bolt hole on the first U-shaped plate (301) and the threaded hole on the brush plate (101) and then tightened to fix the sealing brush (1) on the steel box girder (6).

8. A multifunctional sealing device for a rigid hinge structure area according to any one of claims 1 to 3, characterized in that: The flexible cover fixing mechanism (4) comprises a second U-shaped plate (401) and a second fixing bolt (402).

9. A multifunctional sealing device for a rigid hinge structure area according to claim 8, characterized in that: A bolt hole is provided on one side wing plate of the second U-shaped plate (401), and the other side wing plate is fixed to the steel box girder (6) by welding or bonding. The second fixing bolt (402) passes through the bolt hole of one side wing plate to press or clamp the flexible cover (2) on the other side wing plate, thereby fixing the flexible cover (2) on the steel box girder (6).

10. A sealing method for a rigid hinge structure area, characterized in that: The method is implemented by using a multifunctional sealing device for a rigid hinge structure area according to any one of claims 1 to 9, comprising: S100: Clean the gap between the small box girder and the steel box girder in the rigid hinge structure area and the debris and stains on the upper surface of the small box girder to ensure cleanliness; at the same time, check the sealing brush and flexible cover to ensure that they are not damaged or worn to ensure the sealing performance; S200: Fix the sealing brushes on the steel box girder in sections along the gap between the small box girder and the steel box girder, ensuring that the brush wires are densely arranged and fit into the gap between the small box girder and the steel box girder; S300: According to the curvature of the small box girder, the flexible cover is welded in sections and blocks by heat welding or ultrasonic welding, and then covered on the outer surface of the top of the small box girder, and extended to the edge of the small box girder for protection. The flexible cover fixing mechanism is used to fix the flexible cover on the steel box girder to ensure that the flexible cover can be freely stacked and stretched when the expansion joint is deformed; S400: Check the fixing of the sealing brush and the flexible cover to ensure that they can adapt to the deformation of the rigid hinge structure, and conduct an overall functional test to ensure that the sealing device can operate normally to achieve the functions of steel box girder sealing, expansion joint sewage drainage, and rigid hinge expansion and deformation.

Images