Dehumidification system

Abstract

The invention discloses a dehumidification system, relates to the field of bridge maintenance devices, and aims to improve the protection effect on a main cable and reduce the installation difficulty. The dehumidification system in the scheme comprises a main machine, air supply pipes and air inlet sealing covers, the main machine is communicated with the multiple air inlet sealing covers through the multiple air supply pipes, the main machine is used for being installed on a cross beam at the top of a bridge tower, and a cooler capable of generating dry air, a dehumidifier and a filter are arranged in the main machine. The air inlet sealing cover used for partially wrapping the main cable comprises two semicircular cylinders, and the two semicircular cylinders are in a circular tube shape after being encircled. According to the protection and dehumidification system for the main cable of the suspension bridge, the main cable is effectively protected, long-term stable operation of the system is ensured through a series of elaborately-designed key components and technical means, the safety of the bridge is improved, and the service life of the bridge is prolonged.

Description

Technical Field

[0001] The invention relates to a bridge maintenance device. Background Art

[0002] As a common large-scale bridge structure, the main cable of a suspension bridge is one of the key load-bearing components of the entire bridge. Since the main cable of a suspension bridge is usually exposed to the natural environment, it is affected by harsh conditions such as wind, rain, direct sunlight, and salt spray for a long time. In particular, the humid environment is prone to metal corrosion, which not only affects the aesthetics of the bridge, but more importantly, it will weaken the mechanical strength of the main cable, shorten the service life of the bridge, and may bring safety hazards. Therefore, how to effectively protect the main cable from corrosion has become an important issue in the design and maintenance of suspension bridges.

[0003] Traditional protection methods mainly include physical barrier measures such as applying anti-corrosion coatings, using anti-rust paint or installing sunshades, but these methods are difficult to fundamentally solve the corrosion problem caused by humidity, and over time, the coating may age and peel off, losing its protective effect. In addition, some bridges use ventilation systems to reduce the humidity inside the main cable, but due to the lack of an effective drying mechanism, the effect is limited, especially in high humidity areas, where it is difficult to maintain an ideal low-humidity environment.

[0004] In recent years, with the development of materials science and technology, people have begun to explore more advanced dehumidification systems to protect the main cables of suspension bridges. These systems are designed to delay or even prevent the occurrence of corrosion by delivering dry air into the main cables to maintain a low relative humidity. The Chinese patent with patent publication number CN107366228A discloses an air drying method, system and air supply pipeline for the main cables of suspension bridges, wherein the air drying method includes the following steps: fixing the air supply pipeline at the internal position of the main cable cross section to replace the original cable strand; setting air inlets at the two anchoring sections of the main cable to deliver dry air into the air supply pipeline; setting air outlet valves at intervals in the length direction of the main cable to discharge moisture in the main cable. The structure of the drying system is: anchoring devices are provided at both ends of the main cable, and air inlet devices are also provided at both ends of the main cable. The air inlet device is connected to the air supply pipeline in the main cable, and air outlet valves are provided at intervals on the main cable. The air inlet device, air supply pipeline and air outlet valve form a continuous gas passage. The present invention does not forcibly require the absolute airtightness of the main cable, and the implementation effect and scope of action are greatly improved compared with the original method.

[0005] However, the existing dehumidification system still has the following shortcomings:

[0006] Limited coverage: Some systems can only dehumidify local areas and cannot effectively protect the entire main cable.

[0007] High installation complexity: Some equipment is bulky and has limited installation locations, which increases construction difficulty and cost.

[0008] Any discussion of the background technology throughout the specification does not mean that the background technology is necessarily the prior art known to technicians in the relevant field; any discussion of the prior art throughout the specification does not mean that the prior art is necessarily widely known. Summary of the invention

[0009] The present invention aims to provide a dehumidification system to improve the protection effect on the main cable and reduce the difficulty of installation.

[0010] The dehumidification system in this scheme includes a main unit, an air supply pipe and an air inlet sealing cover. The main unit is connected to multiple air inlet sealing covers through multiple air supply pipes. The main unit is used to be installed on the beam at the top of the bridge tower. The main unit is equipped with a cooler, a dehumidifier and a filter that can generate dry air. The air inlet sealing cover used to partially wrap the main cable includes two semi-cylinders, which are in the shape of a circular tube when the two semi-cylinders are embraced.

[0011] The following are the main benefits of this system:

[0012] Efficient anti-corrosion protection: Through the combined use of coolers, dehumidifiers and filters, the main engine can produce extremely dry and pure air, effectively preventing corrosion problems caused by moisture on the main cable and significantly extending the service life of the main cable.

[0013] Uniform coverage and precise control: The main unit is connected to multiple air inlet sealed covers through multiple air supply pipes to ensure that dry air can be evenly distributed to different positions of the main cable, achieving comprehensive control of the humidity of the main cable environment. Each sealed cover operates independently and can adjust the air flow according to the needs of the specific location to ensure the best dehumidification effect.

[0014] Stable structure and easy installation and maintenance: The air inlet sealing cover adopts two semi-cylinders, which form a tight round tube structure after embracing, which is easy to install and ensures good sealing. This design not only adapts to main cables of different diameters, but also allows quick disassembly for inspection or maintenance, reducing maintenance time and cost.

[0015] Optimize space utilization: The main unit is installed on the beam at the top of the bridge tower, making full use of the space of the existing structure, avoiding additional occupation of the bridge deck or other important areas, and maintaining the overall aesthetics and traffic efficiency of the bridge.

[0016] In summary, the main cable protection and dehumidification system for suspension bridges provided by the present invention not only realizes effective protection of the main cables, but also ensures the long-term stable operation of the system through a series of carefully designed key components and technical means, thereby improving the safety and service life of the bridge.

[0017] Furthermore, a muffler is provided in the main unit, and a controller connected to the main unit is also provided.

[0018] Furthermore, an air outlet is provided between two adjacent air inlet sealing covers of the main cable, and air outlets are also provided at the head and tail ends of the main cable.

[0019] Furthermore, the semi-cylinders are respectively equipped with matching flange edges and bolt holes.

[0020] Furthermore, a flow meter is provided on the air supply pipe.

[0021] Furthermore, the air inlet sealing cover is connected to an exhaust valve via a flange.

[0022] Furthermore, a thermometer, a resin observation window and a drain pipe are provided on the air inlet sealing cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the structure of the host part in an embodiment of the present invention.

[0024] Figure 2 Schematic diagram of the structure of the air supply pipe part in an embodiment of the present invention.

[0025] Figure 3 Schematic diagram of the structure of the air inlet sealing cover part in an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below through specific embodiments:

[0027] The figure marks in the drawings of the specification include: main unit 1, cooler 11, muffler 12, dehumidifier 13, filter 14, air supply pipe 2, winding steel wire 21, elbow pipe 22, metal hose 23, flow meter 24, air inlet sealing cover 3, pressure gauge 31, exhaust valve 32, air supply pipe flange 33, resin observation window 34, thermometer 35, drain pipe 36, cable clamp 4.

[0028] The dehumidification system in this embodiment includes two main units, which are installed on the beams at the top of the two bridge towers. This position is near the highest point of the main cable, which allows the output low-temperature gas to pass through the main cable more easily. Figure 1As shown in the figure, the host integrates a cooler, a muffler, a dehumidifier, and a filter box. The cooler is connected to the outside atmosphere through a ventilation pipe to inhale the air to be processed; the dehumidifier is connected to the atmosphere through an exhaust pipe to discharge the moisture generated during the processing. The cooler, muffler, dehumidifier and filter box are connected in series in sequence. The cooler can reduce the temperature of the air entering the system, making it easier for moisture to condense and be removed, thereby improving the subsequent dehumidification efficiency. The filter box can remove tiny particles, dust and harmful gases in the air to ensure the purity of the air quality sent to the main cable. The air becomes dry and pure after being processed in sequence by these components. There are also matching distribution boxes and control boxes next to the host, which evenly distribute the gas to each air supply pipeline under the control of the distribution box and the control box. The control box integrates the data acquisition and control system of all sensors, which can realize the automatic management of the entire dehumidification process.

[0029] The air outlet of the cooler sends the gas to the air inlet sealing cover through the air supply pipe. The air supply pipe is made of stainless steel. The use of stainless steel not only provides good corrosion resistance, but also ensures long-term stable working conditions. The multi-channel air supply pipes corresponding to a host are simultaneously connected to different nodes on the main cable. Each node is equipped with an air inlet sealing cover. The gas enters the main cable through the air inlet sealing cover and flows from the node along the front and rear directions of the main cable at the same time, fully affecting the environmental state of the main cable. An air outlet can be set between the two nodes for gas to flow out, and an air outlet can also be set at the head and tail ends of the main cable.

[0030] like Figure 2 As shown in the figure, the air supply pipe is connected to the air inlet sealing cover fixed on the main cable at each node. The air inlet sealing cover consists of two semi-cylinders, which are respectively equipped with matching flange edges and holes so that they can be fastened with high-strength stainless steel bolts to form a closed and stable cylindrical sealing environment to wrap the main cable. Dry air enters the gap of the main cable here and flows out along the direction of the main cable. This design not only facilitates installation and disassembly, but also ensures good sealing performance to prevent external humid air from infiltrating. The air supply pipe is connected to the air inlet sealing cover through a series of components: first, the end of the air supply pipe changes direction through an elbow pipe so that it can adjust its direction to connect to the sealing cover; then, the elbow pipe is connected to the flowmeter through a section of metal hose to adapt to possible slight position deviations and reduce vibration transmission; finally, the flowmeter is directly connected to the air inlet flange on the air inlet sealing cover. The selection of the metal hose takes into account its flexibility and corrosion resistance, which not only ensures the sealing of the connection, but also allows a certain degree of displacement to avoid stress damage caused by bridge vibration or thermal expansion and contraction. The flow meter is used to monitor and adjust the flow of dry air entering the sealed cover in real time to ensure the best dehumidification effect. There is an inspection road above the main cable and handrails on both sides.

[0031] like Figure 3As shown in the figure, the air inlet sealing cover is provided with an outlet flange, which is connected to the exhaust valve by flange connection. The exhaust valve can be selected with a model with automatic pressure relief function, which can automatically open when the internal pressure of the system exceeds the safe range to release excess gas and protect the system from high pressure damage. In addition, the pressure gauge installed on the outlet flange can intuitively display the air pressure condition in the system, helping operators to understand and adjust the system operation status in time. An electronic thermometer for monitoring the air temperature entering the sealing cover is also installed on the upper part of the air inlet sealing cover, which can transmit temperature data to the control system as an important basis for adjusting the working parameters of the cooler. The transparent resin observation window is located in the middle of the sealing cover and is made of high-strength transparent resin material. It can withstand the internal and external pressure difference and provide a clear line of sight, which is convenient for operators to observe the internal situation of the sealing cover and check whether there is abnormal water accumulation or other problems. The drain pipe is installed at the bottom of the sealing cover to remove possible condensed water. The drain pipe is designed with an anti-backflow mechanism to prevent external water from flowing back into the sealing cover. The outlet of the drain pipe can be selectively connected to the water collecting tank or directly discharged outside the bridge deck, depending on the specific application scenario.

[0032] The above is only an embodiment of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the scheme of the present invention. For example, the cooler can output air higher than the ambient temperature, that is, the high-temperature gas outlet of the cooler is connected to the air supply pipe. Originally, the cooler outputs hot air at one end and cold air at the other end to ensure energy conservation. In this way, the system outputs hot air instead of cold air. This function is mainly used for bridge deicing in cold weather, because the inclined cables and main cables may also accumulate snow or ice due to low temperatures, affecting their performance and life. Appropriate heating measures can help remove snow and prevent stress concentration caused by freezing. These should also be regarded as the scope of protection of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection claimed by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. Dehumidification system, characterized by: It includes a main unit, an air supply pipe and an air inlet sealing cover. The main unit is connected to multiple air inlet sealing covers through multi-way air supply pipes. The main unit is used to be installed on the beam on the top of the bridge tower. The main unit is equipped with a cooler, a dehumidifier and a filter that can generate dry air. The air inlet sealing cover used to partially wrap the main cable includes two semi-cylinders, which are in the shape of a circular tube when the two semi-cylinders are embraced.

2. The dehumidification system according to claim 1, characterized in that: A silencer is also arranged in the main machine, and a controller connected with the main machine is also arranged.

3. The dehumidification system according to claim 2, characterized in that: An air outlet is arranged between two adjacent air inlet sealing covers of the main cable, and air outlets are also arranged at the head and tail ends of the main cable.

4. The dehumidification system according to claim 3, characterized in that: The half cylinders are equipped with matching flange edges and bolt holes.

5. The dehumidification system according to claim 4, characterized in that: A flow meter is provided on the air supply pipe.

6. The dehumidification system according to claim 5, characterized in that: The air inlet sealing cover is connected with an exhaust valve via a flange.

7. The dehumidification system according to claim 6, characterized in that: The air inlet sealing cover is provided with a thermometer, a resin observation window and a drain pipe.

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