Anti-icing device for stay cable

Abstract

The utility model discloses a stay cable anti-icing device which comprises a sleeve and a phase change material layer arranged in the wall of the sleeve, the sleeve sleeves and covers the periphery of a stay cable, the wall of the sleeve is of an annular wall structure, a sealed hollow space is formed between the annular wall structures, the hollow space is filled with the phase change material layer, and the phase change material layer is arranged in the phase change material layer. An opening penetrating through the hollow space is formed in the wall of the sleeve so that the phase change material layer can be filled, released or replaced. The characteristics of energy storage, temperature control and the like of the phase-change material are fully utilized, the problem that the stay cable is icy in winter can be solved, and the characteristics of cleanness, energy conservation and the like are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering and cable structure engineering, and more specifically, to an anti-icing device for a stay cable. Background Art

[0002] The problem of ice spikes on the cable-stayed cable in winter is an important issue in bridge operation. In winter, the cable-stayed cable is prone to ice. When the temperature rises during the day, the ice spikes will fall off, affecting passing vehicles and pedestrians. In order to solve this problem, heating, electric heating, chemical and mechanical deicing methods can be used. Among them, the heating method is a commonly used method. The surface temperature of the cable-stayed bridge can be increased by delivering heated air into the cable-stayed cable, thereby preventing the cable from freezing. The heated air delivered into the cable-stayed cable contains a large amount of water vapor, which can easily cause corrosion of the cable steel wire. The electric heating method will cause local high temperature of the HDPE sheath of the cable-stayed cable, greatly reducing the life of the cable sheath. The chemical and mechanical deicing methods are prone to damage the cable sheath during the deicing process. Therefore, some existing deicing methods have some technical problems.

[0003] Phase change materials refer to materials that change the state of matter and provide latent heat when the temperature remains unchanged. Phase change materials have three states, namely solid phase, liquid phase and gas phase, and phase change is the transition between phases. The process of changing physical properties is called phase change process, and at this time, the phase change material will absorb or release a large amount of latent heat. Phase change materials have the characteristics of high heat storage density, wide range of materials, and stable working temperature. At present, the main application is the transition between the solid phase and the liquid phase of the material. The most common is the phase change of ice and water. According to the transition between ice and water, we can find that ice and water can absorb and release a lot of heat during the transition process, and the temperature remains unchanged during the melting process. Therefore, phase change energy storage can not only store heat and cold, but also control temperature compared to other energy storage. In general, phase change energy storage has two major functions, namely energy storage and temperature control. If the characteristics of phase change materials can be used, the anti-icing of the inclined cable can be achieved, so that icing can be prevented in advance, and the inclined cable can be better protected. Utility Model Content

[0004] One purpose of the utility model is to provide an anti-icing device for inclined cables, which fully utilizes the energy storage and temperature control characteristics of phase change materials, can not only solve the problem of ice spikes on inclined cables in winter, but also has the characteristics of being clean and energy-saving, and has important practical significance and application value.

[0005] In order to solve the above technical problems, the utility model provides an anti-icing device for an inclined cable, comprising a sleeve and a phase change material layer arranged in the sleeve wall, the sleeve is sleeved and covers the outer periphery of the inclined cable, the sleeve wall is an annular wall structure, a sealed hollow space is formed between the annular wall structures, the phase change material layer is filled in the hollow space, and an opening penetrating the hollow space is provided on the sleeve wall to fill, release or replace the phase change material layer.

[0006] Preferably, the sleeve includes multiple tube units along the length direction of the inclined cable, which are sequentially sleeved on the outer circumference of the inclined cable and connected as a whole so that the hollow spaces of the multiple tube units are connected to form an integral hollow space for filling the phase change material layer.

[0007] Preferably, the pipe unit includes two semicircular structures which are connected as a whole and whose hollow spaces are connected.

[0008] Preferably, the multi-section pipe units and the two semicircular structures are connected as a whole by welding or bonding.

[0009] Preferably, the two ends of the sleeve are connected by a pair of annular plates to form the hollow space into a sealed space, and the pair of annular plates are each provided with an opening penetrating the hollow space, which is opened and closed by a switch.

[0010] Preferably, the switch is a sealing plug or a valve.

[0011] The utility model at least has the following beneficial effects:

[0012] 1. The device of the utility model is installed on the outer surface of the inclined cable, which will not affect the steel wire inside the inclined cable; it will not cause local high temperature of the HDPE sheath of the inclined cable, and will not cause chemical and physical damage to the sheath of the inclined cable; it can achieve anti-icing while also fully protecting the inclined cable.

[0013] 2. The device of the utility model makes full use of the energy storage and temperature control characteristics of phase change materials. It is a clean and energy-saving device. The phase change material is installed in a filling manner and is easy to replace. A variety of phase change materials with different parameters can be replaced within the service life to achieve full utilization of the device and adapt to the needs of different regions and climates. It can be installed in seasons when freezing is possible and removed for maintenance at other times.

[0014] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is an overall cross-sectional view of the utility model;

[0017] Figure 3 It is a cross-sectional view of the sleeve of the utility model;

[0018] Figure 4 It is an enlarged view of the sections of the utility model casing.

[0019] Description of reference numerals:

[0020] 1. Stay cable, 2. Casing, 3. Phase change material layer, 4. Annular plate, 5. Pipe unit. DETAILED DESCRIPTION

[0021] In order to better understand the purpose, structure and function of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement it according to the description.

[0022] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0023] like Figures 1 to 4 As shown, the utility model provides an anti-icing device for an inclined cable 1, comprising a sleeve 2 and a phase change material layer 3 arranged in the wall of the sleeve 2, the sleeve 2 is sleeved and covered on the outer periphery of the inclined cable 1, the wall of the sleeve 2 is an annular wall structure, and a sealed hollow space is formed between the annular wall structures, the phase change material layer 3 is filled in the hollow space, and an opening penetrating the hollow space is provided on the wall of the sleeve 2 to fill, release or replace the phase change material layer 3.

[0024] The present application utilizes the characteristics of phase change materials to solve the problem of freezing of the cable 1 at night in rainy and snowy weather. The cable 1 is prevented from freezing in rainy and snowy weather by using a specially designed phase change material sleeve 2. The sleeve 2 is a tubular structure with two layers of inner and outer phase change materials. The temperature of the phase change material layer 3 of the present application is customized to be above the freezing point (for example, > 0°C); when the temperature exceeds the freezing point, the device absorbs heat and stores energy; when the temperature is below the freezing point, the device releases heat to control the temperature, ensuring that the temperature of the device is above the freezing point, thus ensuring that the device does not freeze and does not produce ice ridges. The device of the present application is a composite structure, with HDPE (high-density polyethylene) or other polymers (PVC, etc.) as wall materials and phase change materials (organic, inorganic or composite, such as paraffin) as core materials, forming a composite tubular structure, which is arranged on the outer surface of the sheath of the cable 1. An opening penetrating the hollow space is provided on the wall of the sleeve 2 , and when the phase change material is liquid, it can be filled into the wall of the sleeve 2 or released to perform maintenance of the sleeve 2 or replace the phase change material.

[0025] In another embodiment, the sleeve 2 includes a plurality of tube units 5 along the length direction of the inclined cable 1, which are sequentially sleeved on the outer circumference of the inclined cable 1 and connected as a whole so that the hollow spaces of the plurality of tube units 5 are connected as a whole to fill the phase change material layer 3. The tube unit 5 includes two semicircular structures, which are connected as a whole and the hollow spaces are connected.

[0026] The casing 2 is a Haversian tube, which includes multiple sections of pipe units 5 spliced ​​together as a whole, and each section of the pipe unit 5 is spliced ​​together as a whole through two semicircular structures. During the splicing process, on the one hand, all structures are formed into a whole, and on the other hand, it is also necessary to ensure that the hollow spaces inside all structures are interconnected as a whole after the splicing is completed. The multiple structures included in the casing 2 can be shipped together with the inclined cable 1, or can be installed on the already built inclined cable 1 of the cable-stayed bridge.

[0027] In another embodiment, the multi-section pipe units 5 and the two semicircular structures are connected as a whole by welding or bonding.

[0028] In another embodiment, the two ends of the sleeve 2 are connected by a pair of annular plates 4 to form the hollow space into a sealed space, and the pair of annular plates 4 are each provided with an opening penetrating the hollow space, which is opened and closed by a switch. The switch is a sealing plug or a valve.

[0029] When the service life is reached, the phase change material inside the casing 2 that can prevent ice formation is installed by filling, which can be quickly installed and easily replaced. It can be installed in the season when ice formation is possible, and removed for maintenance at other times. The phase change material can choose a variety of parameters to meet the needs of different regions and climates. The liquid phase change material is mainly filled into the hollow space through the opening above the inclined cable 1, and the liquid phase change material is released from the hollow space through the opening below the inclined cable 1.

[0030] It can be understood that the present invention is described by some embodiments, and those skilled in the art know that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the present invention. Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation mode. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, other modifications can be easily realized. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to specific details and the illustrations shown and described here.

Claims

1. A stay cable anti-icing device, characterized in that: It includes a sleeve and a phase change material layer arranged in the sleeve wall, the sleeve is sleeved and covers the outer circumference of the inclined cable, the sleeve wall is an annular wall structure, a sealed hollow space is formed between the annular wall structures, the phase change material layer is filled in the hollow space, and the sleeve wall is provided with an opening that passes through the hollow space to fill, release or replace the phase change material layer.

2. The stay cable anti-icing device according to claim 1, characterized in that: The sleeve includes multiple tube units along the length direction of the inclined cable, which are sequentially sleeved on the outer circumference of the inclined cable and connected as a whole so that the hollow spaces of the multiple tube units are connected to form a whole hollow space for filling the phase change material layer.

3. The stay cable anti-icing device according to claim 2, characterized in that: The pipe unit includes two semicircular structures which are connected as a whole and whose hollow spaces are connected.

4. The stay cable anti-icing device according to claim 3, characterized in that: The multi-section pipe units and the two semicircular structures are connected as a whole by welding or bonding.

5. The stay cable anti-icing device according to claim 1, characterized in that: The two ends of the sleeve are connected by a pair of annular plates to form the hollow space into a sealed space. The pair of annular plates are each provided with an opening penetrating the hollow space, which is opened and closed by a switch.

6. The stay cable anti-icing device according to claim 5, characterized in that: The switch is a sealing plug or a valve.

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