A large-span cable-stayed bridge tower drainage and dehumidification system

Abstract

This invention relates to a drainage and dehumidification system for a long-span cable-stayed bridge tower, belonging to the field of long-span bridge technology. It includes a main tower and a crossbeam. The main tower is vertically installed on the ground, and the crossbeam is connected to the main tower. A steel anchor box cavity is coaxially arranged inside the main tower, and a body cavity is provided inside the crossbeam. The system also includes a dehumidifier, an outlet pipe, and a first dehumidification duct. The dehumidifier is located inside the body cavity. One end of the outlet pipe is connected to the dehumidifier, and the other end is located outside the crossbeam. One end of the first dehumidification duct is connected to the dehumidifier, and the other end extends to the bottom of the steel anchor box cavity. By installing the dehumidifier, the humidity inside the steel anchor box cavity is reduced, preventing corrosion caused by humid weather. This solves the problem that existing cable-stayed bridges only have drainage channels, which leads to increased humidity inside the bridge's internal cavities during humid weather, making them prone to corrosion.

Description

Technical Field

[0001] This invention belongs to the field of bridge drainage and dehumidification technology, specifically relating to a drainage and dehumidification system for a long-span cable-stayed bridge tower. Background Technology

[0002] Cable-stayed bridges have become one of the most popular bridge types for long-span bridges due to their small main girder height, large span capacity, and beautiful design. During use, cable stays are prone to corrosion due to weather conditions, especially in areas with high humidity. Rainwater and various corrosive gases can easily cause corrosion of the upper and lower anchor heads of the cable stays. Therefore, existing cable-stayed bridges are equipped with drainage channels.

[0003] For example, the utility model patent with patent authorization announcement number CN 209162636 U relates to a bridge drainage channel. The bridge drainage channel includes a bridge body, with downwardly recessed drainage channels on both sides of the bridge body along its long axis. A guardrail is installed at the top of the drainage channel on the side furthest from the bridge body. An inclined rain grate is installed between the guardrail and the bridge body. The upper surface of the bridge body is covered with a bridge deck layer that is higher in the middle and lower on both sides. The beneficial effects of this utility model are: sewage on the bridge deck layer flows down the slope into the drainage channels on both sides of the bridge body, and then flows into the drain pipe from the joint; sewage that cannot be discharged from the joint in time can flow down the drainage channel from a higher to a lower position, preventing sewage from flowing down the bridge deck; the inclined rain grate prevents debris from falling into the drainage channel under gravity, preventing the drainage channel from being blocked.

[0004] Based on the search of the aforementioned patent grant announcement numbers, and considering their shortcomings, the following was found:

[0005] Existing cable-stayed bridges only have drainage channels and no dehumidification structure. This makes the internal cavities of the existing cable-stayed bridges prone to corrosion when encountering humid weather. Summary of the Invention

[0006] To address the aforementioned problems in the existing technology, this invention provides a drainage and dehumidification system for a long-span cable-stayed bridge tower, comprising a main tower and a crossbeam. The main tower is vertically positioned on the ground, and the crossbeam is connected to the main tower. A steel anchor box cavity is coaxially arranged inside the main tower, and a body cavity is provided inside the crossbeam. The system also includes a dehumidifier, an outlet pipe, and a first dehumidification duct. The dehumidifier is located inside the body cavity, with one end of the outlet pipe connected to the dehumidifier and the other end outside the crossbeam. One end of the first dehumidification duct is connected to the dehumidifier, and the other end extends to the bottom of the steel anchor box cavity. By incorporating the dehumidifier, the humidity inside the steel anchor box cavity is reduced, preventing corrosion caused by humid weather. This solves the problem that existing cable-stayed bridges only have drainage channels without dehumidification structures, leading to increased humidity inside the bridge's internal cavities during humid weather, which easily causes corrosion.

[0007] The objective of this invention can be achieved through the following technical solutions:

[0008] A drainage and dehumidification system for a long-span cable-stayed bridge tower includes two main towers and a crossbeam. The two main towers are vertically installed on the ground, and both ends of the crossbeam are connected to the two main towers respectively. A steel anchor box cavity is coaxially arranged inside the main tower. A body cavity is provided inside the crossbeam. The system also includes a dehumidifier, an outlet pipe, and a first dehumidification duct. The dehumidifier is installed inside the body cavity. One end of the outlet pipe is connected to the dehumidifier, and the other end is located outside the crossbeam. One end of the first dehumidification duct is connected to the dehumidifier, and the other end extends into the bottom of the steel anchor box cavity.

[0009] The crossbeam is horizontally arranged, and the two main towers are symmetrically arranged along the vertical centerline of the crossbeam;

[0010] The main tower also includes a tower cover plate, and the main tower is also provided with a drainage trough. The drainage trough is located at the top of the tower steel anchor box cavity, and the tower cover plate is located between the drainage trough and the tower steel anchor box cavity to isolate the drainage trough and the tower steel anchor box cavity.

[0011] The main tower also includes a connecting plate and a sealing door. The connecting plate is coaxially disposed on the top of the tower cover plate. Both the connecting plate and the tower cover plate are coaxially provided with through holes. The through hole size of the connecting plate is the same as the through hole size of the tower cover plate. The sealing door is disposed on the top of the through hole of the connecting plate.

[0012] The connecting plate, the tower cover plate, and the main tower sidewall together form an annular water trough. The top of the tower cover plate is provided with a waterproof layer, which is composed of a fiber mesh concrete protective layer. The main tower sidewall and the top of the connecting plate in the drainage trough are sealed with paint.

[0013] The main tower also includes two drainage pipes and two drainage channels. One end of the drainage channel is connected to the bottom of the boiling water channel, and the other end of the drainage channel is connected to the outside. The two drainage pipes and the two drainage channels are matched one-to-one. Each drainage pipe is set in the corresponding drainage channel. The connection between the opening of the drainage channel and the drainage pipe is coated with polyurethane paint, and waterproof membrane is laid to the connection between the opening of the drainage channel and the drainage pipe. The waterproof membrane has multiple triangular holes in the middle and is tightly attached to the side wall of the main tower.

[0014] The main tower also includes a support plate, a pressurizing fan, a first dehumidifying duct, and an electrical control cabinet. The support plate is located at the top of the steel anchor box cavity of the tower. The pressurizing fan is located at the top of the support plate. The two ends of the second dehumidifying duct are respectively connected to the pressurizing fan and the cavity. The electrical control cabinet is located inside the cavity and is electrically connected to the pressurizing fan.

[0015] The main tower also includes an exhaust fan, which is located inside the body cavity. The exhaust fan has an air intake and an air outlet, with the air intake located inside the body cavity and the air outlet located to the outside.

[0016] As a preferred embodiment of the present invention, the sealing door includes a cover steel plate, an outer sealing groove plate, an inner sealing groove plate, and a sealing strip. The cover steel plate is disposed on the top of the connecting plate, and the outer sealing groove plate and the inner sealing groove plate are both disposed on the bottom of the connecting plate. The outer sealing groove plate and the inner sealing groove plate are arranged around the center of the cover steel plate, and the two groove plates, the side of the cover steel plate, and the through hole are arranged parallel to each other. A sealing space is formed between the two groove plates and the cover steel plate, and the sealing strip is embedded in the sealing space.

[0017] The spacing between the inner sealing groove plates is equal to the inner diameter of the through hole in the connecting plate, and the spacing between the outer sealing groove plates is equal to the inner diameter of the through hole in the connecting plate.

[0018] The inner sealing groove plate and the outer sealing groove plate are at the same height. The inner sealing groove plate is located at the top of the connecting plate and is 20-50mm away from the connecting plate.

[0019] The sealing door also includes an angle steel and a sealing ring plate. The angle steel is arranged around the central axis of the through hole at the top of the connecting plate. The sealing ring plate is arranged around the central axis of the through hole. One end of the sealing ring plate is welded to the angle steel, and the other end is sealed and abutted against the sealing strip.

[0020] The sealing door also includes a first embedded part, which is embedded in the connecting plate and welded to the angle steel.

[0021] The sealing door also includes two stiffening long ribs, two rotating shaft plates, a support anchor plate, and a second embedded part. The support anchor plate is disposed on the top of the connecting plate. The two rotating shaft plates are respectively disposed parallel to each other on the support anchor plate. The two stiffening long ribs are disposed parallel to each other on the top of the cover steel plate, and the ends of the two stiffening long ribs extend out of the cover steel plate. The two stiffening long ribs and the two rotating shaft plates are matched one-to-one. The end of any stiffening long rib is hinged to the corresponding rotating shaft plate.

[0022] The support anchor plate is connected to the second embedded part, and the second embedded part is embedded in the connecting plate;

[0023] The sealing door also includes a stiffening sealing connecting steel plate, a screw rod, a fixed support, and a handwheel. The stiffening sealing connecting steel plate is located parallel to the bottom of the first end of the stiffening long rib plate. The stiffening sealing connecting steel plate is horizontally connected to the angle steel. The fixed support is located at the bottom of the cover steel plate. One end of the screw rod is vertically connected to the fixed support, and the other end passes through the stiffening sealing connecting steel plate. The handwheel is threaded to the other end of the screw rod and is located at the bottom of the stiffening sealing connecting steel plate.

[0024] The sealing door also includes a handle, which is disposed on the top of the cover steel plate and located on the top of the fixed support.

[0025] As a preferred embodiment of the present invention, both drain pipes are disposed on the same side of the drainage trough, and the drainage trough is provided with a first drainage area, a second drainage area, a third drainage area and a fourth drainage area;

[0026] The first drainage zone is formed by connecting the two ends of the side wall of the connecting plate away from the drain pipe with the midpoint of the side wall of the drainage trough on the same side, forming an isosceles triangle. The slope from the top centerline to the two sides of the bottom is 2%.

[0027] The two drain pipes are connected to the inner apex of their respective nearest drainage channels to form a fourth drainage area of ​​a right triangle, with a downward slope of 2% from the opposite right-angled side of the drain pipe to the hypotenuse.

[0028] The third drainage zone, formed by connecting the two drain pipes to the midpoint of the connecting plate, is an isosceles triangle with a downward slope of 2% from the top centerline to both sides.

[0029] The other areas are designated as the second drainage zone, with a 2% downward slope from the sidewall of the drainage ditch away from the drain pipe towards the drain pipe.

[0030] As a preferred embodiment of the present invention, the drain pipe includes, in sequence along the water flow direction, a coaxially connected wide-mouth drain pipe section, a long straight pipe section, a reducing pipe section, and an interface pipe section;

[0031] The interior of both the wide-mouth drain pipe section and the long straight pipe section is cylindrical. The inner diameter of the wide-mouth drain pipe section is 30-60mm larger than that of the long straight pipe section. The reducing pipe section is frustum-shaped. The interface pipe section is cylindrical. The inner diameter of the interface pipe section is 20-40mm larger than that of the long straight pipe section.

[0032] The drainage wide-mouth pipe section includes, in sequence along the water flow direction, a wide-mouth thickened pipe wall, a wide-mouth transition pipe wall, and a wide-mouth thin pipe wall arranged coaxially. The wall thickness of the wide-mouth thickened pipe wall is 2-3 times the wall thickness of the wide-mouth thin pipe wall; the wall thickness of the wide-mouth transition pipe wall decreases uniformly along the water flow direction.

[0033] The drain pipe also includes a stepped thickening pipe section, which is coaxially connected to the drain wide-mouth pipe section and the long straight pipe section. The wall thickness of the stepped thickening pipe section gradually and uniformly decreases along the water flow direction. The length of the stepped thickening pipe wall is 20-40mm, and the wall thickness of the long straight pipe section is consistent throughout.

[0034] The inner diameter of the variable diameter pipe section increases sequentially along the water flow direction, and the wall thickness of the variable diameter pipe section is consistent everywhere, and the length of the variable diameter pipe section is 30-50mm.

[0035] The end of the interface pipe section is inclined, and the longer side of the end of the interface pipe section is 8-15mm longer than the shorter side.

[0036] The beneficial effects of this invention are as follows:

[0037] This invention provides a drainage and dehumidification system for a long-span cable-stayed bridge tower, comprising a main tower and a crossbeam. The main tower is vertically positioned on the ground, and the crossbeam is connected to the main tower. A steel anchor box cavity is coaxially arranged inside the main tower, and a body cavity is provided inside the crossbeam. The system also includes a dehumidifier, an outlet pipe, and a first dehumidification duct. The dehumidifier is located inside the body cavity, and one end of the outlet pipe is connected to the dehumidifier, while the other end is located outside the crossbeam. One end of the first dehumidification duct is connected to the dehumidifier, and the other end extends to the bottom of the steel anchor box cavity. By incorporating the dehumidifier, the humidity inside the steel anchor box cavity is reduced, preventing corrosion caused by humid weather. This solves the problem that existing cable-stayed bridges only have drainage channels without dehumidification structures, which leads to increased humidity inside the cable-stayed bridge during humid weather, making the internal cavity prone to corrosion. Attached Figure Description

[0038] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0039] Figure 1 This is an internal diagram of a drainage and dehumidification system for a long-span cable-stayed bridge tower according to the present invention.

[0040] Figure 2 For the present invention Figure 1 Enlarged view of point A;

[0041] Figure 3 For the present invention Figure 1 Enlarged view of point B;

[0042] Figure 4 This is an internal view of the drainage channel of the present invention;

[0043] Figure 5 This is a top view of the sealing door of the present invention;

[0044] Figure 6 This is an internal view of the drain pipe of the present invention;

[0045] Figure 7 This is a top view of the sealing door of the present invention;

[0046] Figure 8 This is a cross-sectional view of the sealing door of the present invention;

[0047] Figure 9 This is a longitudinal sectional view of the sealing door of the present invention;

[0048] Figure 10 This is a top view of the interior of the beam of the present invention;

[0049] Explanation of main symbols

[0050] In the diagram: 1. Main tower; 101. Tower steel anchor box cavity; 2. Crossbeam; 201. Body cavity; 3. Dehumidifier; 4. Outlet pipe; 5. First dehumidification duct; 6. Tower cover plate; 7. Drainage trough; 8. Connecting plate; 9. Sealing door; 901. Cover steel plate; 902. Sealing outer groove plate; 903. Sealing inner groove plate; 904. Sealing strip; 905. Angle steel; 906. Sealing ring plate; 907. First embedded part; 908. Stiffening long rib plate; 909. Rotating shaft plate; 910. Support anchor plate; 911. Second embedded part; 912. Stiffening sealing connection steel plate; 913. Threaded bolt 914. Rod; 915. Fixed support; 916. Handwheel; 917. Handle; 10. Drain pipe; 1001. Wide-mouth drain pipe section; 1002. Thickened ladder-mouth pipe section; 1003. Long straight pipe section; 1004. Variable diameter pipe section; 1005. Interface pipe section; 1006. Wide-mouth thickened pipe wall; 1007. Wide-mouth transition pipe wall; 1008. Wide-mouth thin pipe wall; 11. Support plate; 12. Pressurized fan; 13. Electrical control cabinet; 14. Exhaust fan; 15. Second dehumidification duct; 16. First drainage zone; 17. Second drainage zone; 18. Third drainage zone; 19. Fourth drainage zone. Detailed Implementation

[0051] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0052] Please see Figure 1-10This embodiment provides a drainage and dehumidification system for a long-span cable-stayed bridge tower, including two main towers 1 and a crossbeam 2. The two main towers 1 are vertically installed on the ground, and both ends of the crossbeam 2 are connected to the two main towers 1 respectively. The crossbeam 2 is horizontally installed, and the two main towers 1 are symmetrically arranged along the vertical centerline of the crossbeam 2. A tower steel anchor box cavity 101 is coaxially installed inside the main tower 1, and a body cavity 201 is installed inside the crossbeam 2. The system also includes a dehumidifier 3, an outlet pipe 4, and a first dehumidification duct 5. The dehumidifier 3 is installed inside the body cavity 201. One end of the outlet pipe 4 is connected to the dehumidifier 3, and the other end is placed outside the crossbeam 2. One end of the first dehumidification duct 5 is connected to the dehumidifier 3, and the other end extends to the bottom of the tower steel anchor box cavity 101. The purpose of this arrangement is that when the weather is humid, the humidity inside the tower steel anchor box cavity 101 inside the main tower 1 will increase. Because water molecules in the air are heavier, this will cause the tower... The humidity inside the steel anchor box cavity 101 is concentrated at the bottom. Therefore, this solution incorporates a dehumidifier 3. One end of the first dehumidification duct 5 is connected to the dehumidifier 3, and the other end extends to the bottom of the steel anchor box cavity 101. Once the dehumidifier 3 starts working, it draws water molecules from the steel anchor box cavity 101 into the first dehumidification duct 5, which then transmits the water to the other end of the outlet pipe 4, expelling it from the main tower 1. This reduces the humidity inside the steel anchor box cavity 101, preventing corrosion caused by humid weather. This solution addresses the problem of existing cable-stayed bridges only having drainage channels 7 without dehumidification structures, which leads to increased humidity inside the cable-stayed bridge during humid weather, making it prone to corrosion.

[0053] It is worth noting that the height of the crossbeam 2 in this scheme is closer to the bottom of the steel anchor box cavity 101 inside the main tower 1. Therefore, when the dehumidifier 3 absorbs the water molecules at the bottom of the steel anchor box cavity 101, this scheme does not require the addition of a pressurizing device.

[0054] On the one hand, as the humidity of the weather increases, the humidity inside the steel anchor box cavity 101 of the main tower 1 will also increase. At this time, water molecules inside the steel anchor box cavity 101 will be dispersed throughout the cavity. Therefore, in order to more thoroughly reduce the humidity inside the steel anchor box cavity 101 of the main tower 1, this solution also includes a support plate 11, a pressurizing fan 12, a second dehumidifying duct 15, and an electrical control cabinet 13. The support plate 11 is located at the top of the steel anchor box cavity 101, the pressurizing fan 12 is located at the top of the support plate 11, the two ends of the second dehumidifying duct 15 are connected to the pressurizing fan 12 and the cavity 201 respectively, and the electrical control cabinet 13 is located inside the cavity 201. The electrical control cabinet 13 is electrically connected to the pressurizing fan 12. When the pressurizing fan 12 starts working, it will dehumidify the tower... Water molecules at the top of the steel anchor box cavity 101 are absorbed into the second dehumidification duct 15 and then transported to the body cavity 201 through the second dehumidification duct 15. Since the main tower 1 of this scheme also includes an exhaust fan 14, which is located inside the body cavity 201, the exhaust fan 14 is equipped with an air intake and an air outlet. The air intake is located inside the body cavity 201, and the air outlet is located to the outside. The water molecules located in the body cavity 201 will eventually be transported to the air outlet of the exhaust fan 14 through the air intake, thereby realizing the transfer of water molecules in the body cavity 201 to the outside. This achieves the absorption of water molecules at the top of the steel anchor box cavity 101, further reducing the humidity inside the steel anchor box cavity 101 and avoiding the situation where corrosion is likely to occur inside the steel anchor box cavity 101 due to humid weather.

[0055] On the other hand, the main tower 1 of this solution is also equipped with a drainage trough 7, which is located at the top of the steel anchor box cavity 101. The distance between the drainage trough 7 and the top of the steel anchor box cavity 101 is not far. Therefore, when the drainage trough 7 drains water from the main tower 1, it will also cause high humidity at the top of the steel anchor box cavity 101. Therefore, this solution reduces the humidity at the top of the steel anchor box cavity 101 by installing a pressurized fan 12 and a second dehumidification pipe at the top of the steel anchor box cavity 101, thus avoiding corrosion caused by dampness at the top of the steel anchor box cavity 101.

[0056] Specifically, the main tower 1 also includes a tower cover plate 6, which is disposed between the drainage trough 7 and the tower steel anchor box cavity 101 to isolate the drainage trough 7 and the tower steel anchor box cavity 101.

[0057] The main tower 1 also includes a connecting plate 8 and a sealing door 9. The connecting plate 8 is coaxially arranged on the top of the tower cover plate 6. Both the connecting plate 8 and the tower cover plate 6 are coaxially provided with through holes. The through hole size of the connecting plate 8 is the same as the through hole size of the tower cover plate 6. The sealing door 9 is located on the top of the through hole of the connecting plate 8. The sealing door 9 in this scheme is used to seal and isolate the drainage trough 7 and the tower steel anchor box cavity 101, so that the two spaces are not connected to each other, preventing water in the drainage trough 7 from seeping into the tower steel anchor box cavity 101 and causing corrosion inside the tower steel anchor box cavity 101.

[0058] In this design, the connecting plate 8, the tower cover plate 6, and the side wall of the main tower 1 together form an annular drainage channel. A waterproof layer, composed of a fiber mesh concrete protective layer, is installed on the top of the tower cover plate 6. The side wall of the main tower 1 and the top of the connecting plate 8 within the drainage channel 7 are sealed with paint. This arrangement aims to create an annular drainage channel formed by the connecting plate 8, the tower cover plate 6, and the side wall of the main tower 1. The main function of this drainage channel is to collect rainwater from the building surface and guide it to a specific location for discharge, thus preventing rainwater from stagnating on the building surface for extended periods, which could lead to leaks and corrosion. In this building structure, the waterproof layer, composed of a fiber mesh concrete protective layer, is located on top of the tower cover plate 6 to prevent rainwater from penetrating into the building's interior. Furthermore, to further enhance the sealing of the drainage channel, the side wall of the main tower 1 and the top of the connecting plate 8 are sealed with paint. This design effectively prevents rainwater from intruding into the building's interior, ensuring structural stability and extending its service life.

[0059] In addition, the main tower 1 of this scheme also includes two drainage pipes 10. The main tower 1 is equipped with two drainage channels, one end of which is connected to the bottom of the overflow channel, and the other end of which is connected to the outside. The two drainage pipes 10 and the two drainage channels are matched one-to-one. Each drainage pipe 10 is set in the corresponding drainage channel. The connection between the opening of the drainage channel and the drainage pipe 10 is coated with polyurethane paint, and waterproof membrane is laid to the connection between the opening of the drainage channel and the drainage pipe 10. The waterproof membrane has multiple triangular holes in the middle and is tightly attached to the side wall of the main tower 1. The main tower 1 in this scheme is designed with two drainage channels and corresponding drainage pipes 10. The function of these drainage channels is to collect water in the drainage channel 7 and guide it to the outside of the building for removal. One end of the drainage channel is connected to the bottom of the drainage channel 7, and the other end is connected to the outside.

[0060] To ensure a reliable seal at the connection between the drainage channel and the drainage pipe 10, a polyurethane coating is applied. Additionally, a waterproof membrane is used to cover the connection between the drainage channel opening and the drainage pipe 10. This waterproof membrane, with its waterproof properties, effectively prevents water leakage at the connection. Several triangular holes are formed in the center of the waterproof membrane, which is attached to the polyurethane coating surface. These holes increase the adhesion between the polyurethane coating and the waterproof membrane, preventing peeling due to external forces. During installation, the coating penetrates into the pores of the waterproof membrane, increasing their adhesion and effectively improving the sealing and waterproofing of the connection. This design effectively collects and drains rainwater from the building surface, preventing water accumulation inside the building and avoiding leaks and corrosion. Simultaneously, the use of polyurethane coating and waterproof membrane for sealing increases the reliability and sealing of the connection, ensuring that water does not leak into the building and protecting the structural integrity. This design helps improve the durability and lifespan of buildings.

[0061] It is worth noting that, in order to prevent the water in the drainage trough 7 from flowing to the outside through the drain pipe 10 and also seeping into the tower steel anchor box cavity 101 through the sealing door 9, the top height of the connecting plate 8 in this scheme is higher than the bottom height of the drainage trough 7. With this setting, the water flowing into the drainage trough 7 first falls to the bottom of the drainage trough 7 and is then discharged from the main tower 1 through the drain pipe 10, thus avoiding the situation where the water flowing into the drainage trough 7 also seeps into the tower steel anchor box cavity 101 through the sealing door 9.

[0062] Furthermore, the sealing door 9 includes a cover steel plate 901, a sealing outer groove plate 902, a sealing inner groove plate 903, and a sealing strip 904. The cover steel plate 901 is located at the top of the connecting plate 8, and the sealing outer groove plate 902 and the sealing inner groove plate 903 are both located at the bottom of the connecting plate 8. The sealing outer groove plate 902 and the sealing inner groove plate 903 are arranged around the center of the cover steel plate 901, and the two groove plates, the sides of the cover steel plate 901, and the through hole are arranged parallel to each other. A sealing space is formed between the two groove plates and the cover steel plate 901. The sealing strip 904 is fitted into the sealing space. The sealing door 9 is a device used to seal the gaps of the door 9 window, which improves the sound insulation effect of the sealing door 9 while preventing external air, dust, water and other substances from entering the room. In this design, the sealing door 9 consists of a cover steel plate 901, an outer sealing groove plate 902, an inner sealing groove plate 903, and a sealing strip 904. Specifically, the cover steel plate 901 is positioned at the top of the connecting plate 8, while the outer sealing groove plate 902 and the inner sealing groove plate 903 are both positioned at the bottom of the connecting plate 8, surrounding the center of the cover steel plate 901. The sides and through holes between the two groove plates and the cover steel plate 901 are parallel to each other, forming a sealed space. The sealing strip 904 is embedded within the sealed space, serving to seal the gaps. The main significance of this design is that by using the combination of the sealing door 9 and the sealing strip 904, the infiltration and leakage of rainwater inside the main tower 1 can be effectively prevented, improving the sealing performance of the sealing door 9. The material of the sealing door 9 is also very durable, allowing for long-term use, which is one of the key factors in maintaining the sealing door 9 in good working order.

[0063] Specifically, the spacing of the inner sealing groove plates 903 is equal to the inner diameter of the through hole in the connecting plate 8, and the spacing of the outer sealing groove plates 902 is also equal to the inner diameter of the through hole in the connecting plate 8. Furthermore, the inner and outer sealing groove plates 903 are at the same height, with the inner sealing groove plate 903 located at the top of the connecting plate 8, 20-50mm away from it. Additionally, the sealing door 9 in this design also includes an angle steel 905 and a sealing ring plate 906. The angle steel 905 is positioned around the central axis of the through hole at the top of the connecting plate 8. In this design, angle steel 905 is a closed ring that is fastened to the through hole of the connecting plate 8. Sealing ring plate 906 is arranged around the central axis of the through hole. Sealing ring plate 906 is also a closed ring. The bottom end of sealing ring plate 906 is welded to angle steel 905, and its top end is sealed and abutted against sealing strip 904. It is worth noting that when sealing ring plate 906 and sealing strip 904 are sealed and abutted against each other, sealing door 9 achieves the effect of sealing and fastening the through hole of connecting plate 8.

[0064] Specifically, the sealing door 9 also includes a first embedded part 907, which is embedded in the connecting plate 8 and welded to the angle steel 905. In this solution, the first embedded part 907 is embedded in the connecting plate 8, and the top surface of the first embedded part 907 is flush with the top surface of the connecting plate 8. The angle steel 905 is welded to the first embedded part 907, so that the angle steel 905 is fixed at the through hole of the connecting plate 8. It is worth noting that there are several first embedded parts 907 in this solution. Several first embedded parts 907 are evenly arranged at equal angles around the central axis of the angle steel 905. By setting several first embedded parts 907 and welding them to the angle steel 905, the angle steel 905 is stably set at the through hole of the connecting plate 8.

[0065] Specifically, the sealing door 9 also includes two stiffening long ribs 908, two pivot plates 909, a support anchor plate 910, and a second embedded part 911. The support anchor plate 910 is disposed on the top of the connecting plate 8. The two pivot plates 909 are respectively disposed parallel to each other on the support anchor plate 910. The two stiffening long ribs 908 are disposed parallel to each other on the top of the cover steel plate 901, and the ends of the two stiffening long ribs 908 extend out of the cover steel plate 901. The two stiffening long ribs 908 and the two pivot plates 909 are matched one-to-one. The end of any stiffening long rib 908 is hinged to the corresponding pivot plate 909. The support anchor plate 910 is connected to the second embedded part 911, and the second embedded part 911 is embedded in the connecting plate 8. In this scheme, the two stiffening long ribs 908 are disposed parallel to each other on the top of the cover steel plate 901, and the ends of the two stiffening long ribs 908 extend out of the cover steel plate 901. The stiffening rib 908 increases the rigidity and stability of the cover plate 901, provides structural strength support, and can withstand external stress and pressure. Two rotating shaft plates 909 are arranged parallel to each other on the support anchor plate 910 and correspond to the stiffening rib 908. The rotating shaft plates 909 support the opening and closing movement of the cover plate 901, allowing the cover plate 901 to rotate smoothly and flexibly with the help of the shafts. The support anchor plate 910 is located on the top of the connecting plate 8, providing fixation and support for the two rotating shaft plates 909. The function of the support anchor plate 910 is to ensure that the rotating shaft plate 909 can be stably fixed on the connecting plate 8, so that the cover steel plate 901 can work normally and maintain good sealing performance. The second embedded part 911 is embedded in the connecting plate 8, and the top surface of the second embedded part 911 is flush with the top surface of the connecting plate 8. The support anchor plate 910 is welded to the second embedded part 911, so that the support anchor plate 910 is fixed on the connecting plate 8. Through the arrangement of these components, the cover steel plate 901 can achieve stable opening and closing movement, provide sufficient structural support and rigidity, and maintain good sealing performance to meet the usage requirements.

[0066] Specifically, the sealing door 9 also includes a reinforcing sealing connecting steel plate 912, a screw rod 913, a fixed support 914, and a handwheel 915. The reinforcing sealing connecting steel plate 912 is located parallel to the bottom of the first end of the reinforcing long rib plate 908, and is horizontally connected to the angle steel 905. The fixed support 914 is located at the bottom of the cover steel plate 901, and one end of the screw rod 913 is vertically connected to the fixed support 914, while the other end passes through the reinforcing sealing connecting steel plate 912. The handwheel 915 is threaded to the other end of the screw rod 913, and the handwheel 915 is positioned... At the bottom of the reinforcing sealing connecting steel plate 912, this solution includes a handwheel 915, which is threaded to the other end of the screw rod 913. When the handwheel 915 abuts against the reinforcing sealing connecting steel plate 912, the screw rod 913 cannot move freely. Since the other end of the screw rod 913 is welded to the fixed support 914, which is welded to the bottom of the cover steel plate 901, the cover steel plate 901 connected to the screw rod 913 also cannot move, thus fixing the cover steel plate 901 to the through hole of the sealing connecting plate 8.

[0067] Specifically, the sealing door 9 also includes a handle 916, which is located on the top of the cover steel plate 901 and on the top of the fixed support 914. The handle 916 is designed to better open and close the cover steel plate 901.

[0068] Furthermore, in order to ensure that there is no water accumulation in the drainage trough 7 of this solution, and in order to improve the drainage speed and efficiency of the drainage trough 7, the drainage trough 7 of this solution is provided with a first drainage zone 16, a second drainage zone 17, a third drainage zone 18 and a fourth drainage zone 19.

[0069] The first drainage area 16 is formed by connecting the two ends of the side wall of the connecting plate 8 away from the drain pipe 10 with the midpoint of the side wall of the drainage trough 7 on the same side, forming an isosceles triangle. It is worth noting that the two bottom ends of the first drainage area 16 in this scheme are the two ends of the top side wall of the connecting plate 8, and the top end of the first drainage area 16 is the midpoint of the top side wall of the drainage trough 7. A center line is formed by connecting the vertex of the first drainage area 16 to the midpoint of the bottom edge of the first drainage area 16. The downward slope of the center line towards both sides of the first drainage area 16 is 2%. It should be noted that the shape of the connecting plate 8 in this scheme is a hollow cuboid, and the side wall of the connecting plate 8 is parallel to the side wall of the drainage trough 7. With this setting, the water in the first drainage area 16 will flow quickly towards both sides of the first drainage area 16, avoiding the water in the first drainage area 16 from remaining in the first drainage area 16.

[0070] This design includes two drain pipes 10, which are symmetrically arranged on the same side of the drainage trough 7. Each drain pipe 10 corresponds to one of the two vertices at the top of the drainage trough 7. Since each drain pipe 10 and one of the vertices at the top of the drainage trough 7 are located on the same side wall, the two drain pipes 10 are actually connected to the inner vertices of their respective nearest drainage troughs 7 to form a fourth drainage area 19. The surface of the fourth drainage area 19 is a right triangle, and furthermore, the slope from the opposite right-angled side of the drain pipe 10 to the hypotenuse is 2%. With this arrangement, the water in the fourth drainage area 19 will flow quickly toward the hypotenuse of the fourth drainage area 19, preventing the water in the fourth drainage area 19 from remaining in the fourth drainage area 19.

[0071] Furthermore, in this scheme, the two drain pipes 10 are connected to the midpoint of the connecting plate 8 to form an isosceles triangle third drainage area 18. It is worth noting that the third drainage area 18 is formed by connecting the drain pipe 10 to the midpoint of the top edge of the side wall closest to the connecting plate 8. The line connecting the vertex of the third drainage area 18 to the midpoint of the bottom edge of the third drainage area 18 forms a center line. The downward slope of the center line towards both sides of the third drainage area 18 is 2%. With this setting, the water in the third drainage area 18 will quickly flow towards both sides of the third drainage area 18, avoiding the water in the third drainage area 18 from remaining in the third drainage area 18.

[0072] The other area is the second drainage zone 17. The slope from the side wall of the drainage trough 7 away from the drain pipe 10 to the drain pipe 10 is 2%. With this setting, the water in the second drainage zone 17 will flow quickly towards the drain pipe 10, avoiding the water in the second drainage zone 17 from staying in the second drainage zone 17.

[0073] This solution, by setting up a first drainage zone 16, a second drainage zone 17, a third drainage zone 18, and a fourth drainage zone 19, and by setting a slope in each drainage zone, ensures that the water in each drainage zone will not remain in the corresponding drainage zone, that is, the water in the drainage trough 7 will not remain in the drainage trough 7, thus solving the problem of water accumulation in the drainage trough 7 of the existing bridge collapse.

[0074] Furthermore, a first guide angle is formed at the junction of the second drainage zone 17 and the fourth drainage zone 19 in this scheme. The two ends of the first guide angle are connected to the top corner of the drainage trough 7 and the drain pipe 10, respectively. The height of the first guide angle from the top of the drainage trough 7 to the drain pipe 10 gradually decreases. With this setting, the water in the second drainage zone 17 and the fourth drainage zone 19 will flow quickly into the first guide angle, and finally the water will flow through the first guide angle into the corresponding drain pipe 10, thus completing the rapid drainage of the water.

[0075] Similarly, a second guide angle is formed at the junction of the second drainage zone 17 and the third drainage zone 18. The two ends of the second guide angle are connected to the top of the connecting plate 8 and the drain pipe 10, respectively. The height of the second guide angle from the top of the connecting plate 8 to the drain pipe 10 decreases sequentially. With this setting, the water in the second drainage zone 17 and the third drainage zone 18 will flow quickly into the second guide angle, and finally the water will flow through the second guide angle into the corresponding drain pipe 10, completing the rapid drainage of the water.

[0076] Specifically, the top of the drainage trough 7 in this design is inclined from the outside to the inside, so that the water accumulated in the main tower 1 can smoothly enter the drainage trough 7 and accelerate the drainage of the water accumulated in the main tower 1.

[0077] Furthermore, the drain pipe 10 of this scheme includes, along the water flow direction, a coaxially connected wide-mouth drain pipe section 1001, a long straight pipe section 1003, a reducing pipe section 1004, and an interface pipe section 1005; the interiors of the wide-mouth drain pipe section 1001 and the long straight pipe section 1003 are both cylindrical, the inner diameter of the wide-mouth drain pipe section 1001 is 30-60mm larger than the inner diameter of the long straight pipe section 1003, and the reducing pipe section 1004 is frustum-shaped. The interface pipe section 1005 is cylindrical, and its inner diameter is 20-40 mm larger than that of the long straight pipe section 1003. The drain wide-mouth pipe section 1001, along the water flow direction, includes, in sequence, a wide-mouth thickened pipe wall 1006, a wide-mouth transition pipe wall 1007, and a wide-mouth thin pipe wall 1008, all arranged coaxially. The wall thickness of the wide-mouth thickened pipe wall 1006 is 2-3 times that of the wide-mouth thin pipe wall 1008. The wide-mouth transition pipe wall... The wall thickness of section 1007 decreases uniformly along the water flow direction; the drain pipe 10 also includes a stepped thickening section 1002, which is coaxially connected to the drain wide-mouth section 1001 and the long straight section 1003. The wall thickness of the stepped thickening section 1002 gradually and uniformly decreases along the water flow direction, and the length of the stepped thickening pipe wall is 20-40mm. The wall thickness of the long straight section 1003 is consistent throughout; the inner diameter of the reducing section 1004... The dimensions increase sequentially along the water flow direction, and the wall thickness of the reducing pipe section 1004 is consistent throughout, with a length of 30-50mm. The end of the interface pipe section 1005 is inclined, with the longer side of the end of the interface pipe section 1005 being 8-15mm longer than the shorter side. The drainage wide-mouth pipe section 1001 in this design consists of a wide-mouth thickened pipe wall 1006, a wide-mouth transition pipe wall 1007, and a wide-mouth thin pipe wall 1008. The wide-mouth thickened pipe wall 1006 has a larger wall thickness, which can increase the strength and pressure resistance of the pipe. The wall thickness of the wide-mouth transition pipe wall 1007 gradually decreases along the water flow direction, allowing for a smooth transition to the wide-mouth thin pipe wall 1008, reducing water flow resistance and improving fluid discharge efficiency. The long straight pipe section 1003 is part of the drainage pipe 10, and its interior is cylindrical with a consistent wall thickness throughout. The long straight pipe section 1003 is mainly used to transmit water flow, maintain stable fluid flow, and connect other pipe sections. The reducing pipe section 1004 connects the drain wide-mouth pipe section 1001 and the long straight pipe section 1003. Its inner diameter gradually increases along the water flow direction, while the wall thickness remains consistent throughout. The design of the reducing pipe section 1004 smoothly guides the water flow from the wider-mouth pipe section with a larger inner diameter to the longer straight pipe section 1003 with a smaller inner diameter, reducing drastic changes in water flow and pressure loss. The interface pipe section 1005 connects to the end of the long straight pipe section 1003, and its end is inclined, with one side longer than the other.This design alters the direction of water flow, allowing it to flow smoothly out of the drain pipe 10 and reducing water flow impact and eddy current generation. The stepped-thickening pipe section 1002 connects the wide-mouth drain pipe section 1001 and the long straight pipe section 1003, with its wall thickness gradually decreasing along the water flow direction and a length of 20-40mm. The stepped-thickening pipe section 1002 smoothly transitions the changes in inner diameter and wall thickness between the wide-mouth pipe section and the long straight pipe section 1003, reducing water flow turbulence and resistance. Through the above structural design, the drain pipe 10 can achieve smooth and efficient water discharge, reducing pressure loss and water flow instability, and improving system performance and efficiency. The characteristics and functions of each part contribute to optimizing water flow conditions, ensuring the normal operation and safety performance of the drain pipe 10.

[0078] It is worth noting that this plan was actually applied to the TJ-3 section of the Wudang (Yangchang) to Changshun Expressway in Guiyang City, Guizhou Province, and the theory of this plan has been tested by the actual project.

[0079] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A drainage and dehumidification system for a long-span cable-stayed bridge tower, comprising two main towers and a crossbeam, wherein the two main towers are vertically installed on the ground, and both ends of the crossbeam are respectively connected to the two main towers; a tower steel anchor box cavity is coaxially arranged inside the main towers, and a body cavity is arranged inside the crossbeam, characterized in that: It also includes a dehumidifier, an outlet pipe, and a first dehumidification duct. The dehumidifier is located inside the body cavity. One end of the outlet pipe is connected to the dehumidifier, and the other end is located outside the crossbeam. One end of the first dehumidification duct is connected to the dehumidifier, and the other end extends into the bottom of the tower steel anchor box cavity. The crossbeam is horizontally arranged, and the two main towers are symmetrically arranged along the vertical centerline of the crossbeam. The main tower also includes a tower cover plate and a drainage trough. The drainage trough is located at the top of the tower steel anchor box cavity, and the tower cover plate is located between the drainage trough and the tower steel anchor box cavity to isolate the drainage trough from the tower steel anchor box cavity. The main tower also includes a connecting plate and a sealing door. The connecting plate is coaxially disposed on the top of the tower cover plate. Both the connecting plate and the tower cover plate are coaxially provided with through holes. The through hole size of the connecting plate is the same as the through hole size of the tower cover plate. The sealing door is disposed on the top of the through hole of the connecting plate. The connecting plate, the tower cover plate, and the main tower sidewall together form an annular water trough. The top of the tower cover plate is provided with a waterproof layer, which is composed of a fiber mesh concrete protective layer. The main tower sidewall and the top of the connecting plate in the drainage trough are sealed with paint. The main tower also includes two drainage pipes and two drainage channels. One end of the drainage channel is connected to the bottom of the boiling water channel, and the other end of the drainage channel is connected to the outside. The two drainage pipes and the two drainage channels are matched one-to-one. Each drainage pipe is set in the corresponding drainage channel. The connection between the opening of the drainage channel and the drainage pipe is coated with polyurethane paint, and waterproof membrane is laid to the connection between the opening of the drainage channel and the drainage pipe. The waterproof membrane has multiple triangular holes in the middle and is tightly attached to the side wall of the main tower. The main tower also includes a support plate, a pressurizing fan, a second dehumidifying duct, and an electrical control cabinet. The support plate is located at the top of the steel anchor box cavity of the tower. The pressurizing fan is located at the top of the support plate. The two ends of the second dehumidifying duct are respectively connected to the pressurizing fan and the cavity. The electrical control cabinet is located inside the cavity and is electrically connected to the pressurizing fan. The main tower also includes an exhaust fan, which is located inside the body cavity. The exhaust fan has an air intake and an air outlet, with the air intake located inside the body cavity and the air outlet located to the outside.

2. The long-span cable-stayed bridge tower drainage and dehumidification system according to claim 1, characterized in that: The sealing door includes a cover steel plate, an outer sealing groove plate, an inner sealing groove plate, and a sealing strip. The cover steel plate is disposed on the top of the connecting plate. The outer sealing groove plate and the inner sealing groove plate are both disposed on the top of the connecting plate. The outer sealing groove plate and the inner sealing groove plate are arranged around the center of the cover steel plate, and the two groove plates, the side of the cover steel plate, and the through hole are arranged parallel to each other. A sealing space is formed between the two groove plates and the cover steel plate, and the sealing strip is embedded in the sealing space. The spacing between the inner sealing groove plates is equal to the inner diameter of the through hole of the connecting plate, and the spacing between the outer sealing groove plates is greater than the inner diameter of the through hole of the connecting plate. The inner sealing groove plate and the outer sealing groove plate are at the same height. The inner sealing groove plate is located at the top of the connecting plate and is 20-50mm away from the connecting plate. The sealing door also includes an angle steel and a sealing ring plate. The angle steel is arranged around the central axis of the through hole at the top of the connecting plate. The sealing ring plate is arranged around the central axis of the through hole. One end of the sealing ring plate is welded to the angle steel, and the other end is sealed and abutted against the sealing strip. The sealing door also includes a first embedded part, which is embedded in the connecting plate and welded to the angle steel. The sealing door also includes two stiffening long ribs, two rotating shaft plates, a support anchor plate, and a second embedded part. The support anchor plate is disposed on the top of the connecting plate. The two rotating shaft plates are respectively disposed parallel to each other on the support anchor plate. The two stiffening long ribs are disposed parallel to each other on the top of the cover steel plate, and the ends of the two stiffening long ribs extend out of the cover steel plate. The two stiffening long ribs and the two rotating shaft plates are matched one-to-one. The end of any stiffening long rib is hinged to the corresponding rotating shaft plate. The support anchor plate is connected to the second embedded part, and the second embedded part is embedded in the connecting plate; The sealing door also includes a stiffening sealing connecting steel plate, a screw rod, a fixed support, and a handwheel. The stiffening sealing connecting steel plate is located parallel to the bottom of the first end of the stiffening long rib plate. The stiffening sealing connecting steel plate is horizontally connected to the angle steel. The fixed support is located at the bottom of the cover steel plate. One end of the screw rod is vertically connected to the fixed support, and the other end passes through the stiffening sealing connecting steel plate. The handwheel is threaded to the other end of the screw rod and is located at the bottom of the stiffening sealing connecting steel plate. The sealing door also includes a handle, which is disposed on the top of the cover steel plate and located on the top of the fixed support.

3. The drainage and dehumidification system for a long-span cable-stayed bridge tower according to claim 1, characterized in that: Both drain pipes are located on the same side of the drainage trough, which is provided with a first drainage area, a second drainage area, a third drainage area, and a fourth drainage area. The first drainage zone is formed by connecting the two ends of the side wall of the connecting plate away from the drain pipe with the midpoint of the side wall of the drainage trough on the same side, forming an isosceles triangle. The slope from the top centerline to the two sides of the bottom is 2%. The two drain pipes are connected to the inner apex of their respective nearest drainage channels to form a fourth drainage area of ​​a right triangle, with a downward slope of 2% from the opposite right-angled side of the drain pipe to the hypotenuse. The third drainage zone, formed by connecting the two drain pipes to the midpoint of the connecting plate, is an isosceles triangle with a downward slope of 2% from the top centerline to both sides. The other areas are designated as the second drainage zone, with a 2% downward slope from the sidewall of the drainage ditch away from the drain pipe towards the drain pipe.

4. The long-span cable-stayed bridge tower drainage dehumidification system according to claim 1, characterized in that: The drain pipe includes, in sequence along the water flow direction, a coaxially connected wide-mouth drain pipe section, a long straight pipe section, a reducing pipe section, and an interface pipe section; The interior of both the wide-mouth drain pipe section and the long straight pipe section is cylindrical. The inner diameter of the wide-mouth drain pipe section is 30-60mm larger than that of the long straight pipe section. The reducing pipe section is frustum-shaped. The interface pipe section is cylindrical. The inner diameter of the interface pipe section is 20-40mm larger than that of the long straight pipe section. The drainage wide-mouth pipe section includes, in sequence along the water flow direction, a wide-mouth thickened pipe wall, a wide-mouth transition pipe wall, and a wide-mouth thin pipe wall arranged coaxially. The wall thickness of the wide-mouth thickened pipe wall is 2-3 times the wall thickness of the wide-mouth thin pipe wall; the wall thickness of the wide-mouth transition pipe wall decreases uniformly along the water flow direction. The drain pipe also includes a stepped thickening pipe section, which is coaxially connected to the drain wide-mouth pipe section and the long straight pipe section. The wall thickness of the stepped thickening pipe section gradually and uniformly decreases along the water flow direction. The length of the stepped thickening pipe section is 20-40mm, and the wall thickness of the long straight pipe section is consistent throughout. The inner diameter of the variable diameter pipe section increases sequentially along the water flow direction, and the wall thickness of the variable diameter pipe section is consistent everywhere, and the length of the variable diameter pipe section is 30-50mm. The end of the interface pipe section is inclined, and the longer side of the end of the interface pipe section is 8-15mm longer than the shorter side.

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