Thermal insulation device and method for low-temperature hoisting construction of wind power concrete tower

Abstract

The invention relates to the technical field of wind power generation, in particular to a wind power concrete tower low-temperature hoisting construction heat preservation device and method.The wind power concrete tower low-temperature hoisting construction heat preservation device comprises a top frame, the top frame is used for covering the upper end face of a whole-ring barrel section, and a covering layer and an observation area are formed on the top frame; the covering layer is provided with a hoisting hole for the hoisting point to pass through; the top frame is further connected with a plurality of heat preservation enclosures which fall downwards, the adjacent heat preservation enclosures are connected to form a cylindrical enclosure structure, a heating cavity is formed in the enclosure structure, and the whole-ring shell ring is covered with the heating cavity. The heat preservation device further comprises a heating source used for maintaining the temperature in the heating cavity. By means of the heat preservation device and the construction method, the whole-ring shell ring can be wrapped and covered, a heating cavity is formed to heat the interior of the whole-ring shell ring, a proper temperature environment is provided for curing reaction of curing glue, and therefore assembly construction of the whole-ring shell ring is achieved, and concrete tower construction under the low-temperature condition is achieved.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, and in particular to a low-temperature hoisting and insulation device and method for wind power concrete towers. Background Technology

[0002] As a type of high-rise wind turbine, prefabricated concrete towers have seen increasing market share in recent years due to their cost advantages. However, prefabricated wind turbine concrete towers exceed 100 meters in height, and due to size and weight limitations, they can only be assembled after being hoisted onto the wind turbine sites within the wind farm. The joint filler between the annular sections is resin structural adhesive, which requires curing at a suitable temperature. However, in cold seasons or environments with sudden temperature drops, the splicing of the annular sections cannot continue; otherwise, the epoxy structural adhesive will not cure in time, causing abnormal loads on the tower structure and affecting the final structural stability and reliability.

[0003] Therefore, it is necessary to propose more reasonable technical solutions to address the technical problems existing in the current technology. Summary of the Invention

[0004] The main objective of this invention is to provide a thermal insulation device and method for low-temperature hoisting construction of wind power concrete towers. It utilizes easily detachable and detachable thermal insulation and heating fixtures in conjunction with annular cylindrical sections to achieve emergency hoisting operations at low temperatures. The thermal insulation and heating fixtures heat the joints of the annular cylindrical sections, meeting the curing temperature requirements of the resin structural adhesive at the joints during concrete tower hoisting. The solution provided by this invention features rapid heating and good personnel adaptability. It solves the previous problems of construction being impossible in low-temperature environments and the quality risks caused by forced construction leading to inadequate curing of the structural adhesive, significantly improving the feasibility of concrete tower hoisting in low-temperature environments.

[0005] To achieve the above objectives, the construction insulation device adopted in this invention is as follows: A thermal insulation device for low-temperature hoisting construction of a wind power concrete tower includes a top frame that covers the upper surface of the entire ring-shaped cylindrical section. A covering layer and an observation area are formed on the top frame. The covering layer has hoisting holes for the hoisting points to pass through. The top frame is also connected to several downward-hanging thermal insulation barriers. Adjacent thermal insulation barriers are connected to form a cylindrical barrier structure, within which a heating chamber is formed, enclosing the entire ring-shaped cylindrical section. The thermal insulation device also includes a heating source to maintain the temperature within the heating chamber.

[0006] The aforementioned insulation device is used to cover the entire ring section to be installed, forming an insulation and heating chamber. After the entire ring section is joined, insulation is applied to maintain the temperature inside the heating chamber within a suitable range for the curing of the structural adhesive, thereby achieving the connection and fixation of the entire ring section. Even in low-temperature seasons and environments with sudden temperature drops, the installation of the concrete tower can be carried out normally, providing convenience for construction.

[0007] Furthermore, a covering layer is installed above the heating chamber to ensure its airtightness and heating effect. To facilitate construction and connection, the covering layer can be optimized. One feasible option is as follows: the covering layer includes a top cover made of transparent material, which is connected and fixed to the top frame, with the connection sealed. Using this solution, the transparent top layer allows for direct observation of the connection of the entire ring section from the outside, and also facilitates observation of the curing of the internal structural adhesive. In some practical designs, the covering layer can be made of transparent polyethylene material.

[0008] In some other solutions, an openable cover can be installed on the cover layer, allowing observation of the interior after opening the cover.

[0009] Furthermore, the insulated enclosure used to cover and wrap the entire cylindrical section is not limited to a single method. Here, we propose one feasible option: the upper edge of the insulated enclosure connects to the top frame, the lower edge hangs naturally, and adjacent insulated enclosures are connected by connectors to form an integral enclosure structure. Using this solution, after the insulated enclosure forms an integral enclosure structure, it can enclose one or multiple entire cylindrical sections. Therefore, multiple entire cylindrical sections can be covered by the integral enclosure and then heated and cured as a whole, thereby improving construction efficiency.

[0010] Furthermore, the insulated enclosure forms a heating chamber, maintaining the temperature within it to facilitate the curing of the adhesive and connect and fix adjacent cylindrical sections. The insulated enclosure can employ various structures; here, we optimize and propose one feasible option: the insulated enclosure comprises an outer layer and an inner layer. The outer layer is made of insulation material, and the inner layer is made of wear-resistant and heat-insulating material. With this design, the outer layer of the insulated enclosure organizes heat convection within and outside the heating chamber, preventing internal heat loss. The inner layer directly contacts the entire ring of cylindrical sections, providing wear resistance and reflecting heat from inside the heating chamber inwards.

[0011] Furthermore, to better encircle the cylindrical section with the insulation barrier and improve the heating and insulation effect, the structure of the insulation barrier needs to be optimized. One feasible option is proposed here: the lower edge of the insulation barrier is provided with a molded component. After adjacent insulation barriers are spliced ​​and connected, the molded components are joined together, causing the lower part of the barrier structure to fit snugly against the entire cylindrical section. Using this solution, the barrier structure can fit more tightly against the cylindrical section through the molded components, forming a stable covering and resulting in better heating effect within the heating chamber.

[0012] Furthermore, the molded component can be constructed in various forms and is not limited to a single one. Here, we optimize and propose one feasible option: the molded component has a thread-passing structure inside. When adjacent insulation barriers are spliced ​​and connected, a tightening line is set in the thread-passing structure to make the molded component fit tightly against the outer wall surface of the entire ring section. When the above solution is adopted, the lower edge of the insulation barrier can be tightly fitted to the cylinder section by means of the tightening line and the molded component, avoiding gaps.

[0013] Furthermore, the connection structure between adjacent insulated enclosures can adopt various schemes and is not limited to one. Here, we optimize and propose one feasible option: the connectors include at least zippers, Velcro, or fasteners provided on the side of the insulated enclosure.

[0014] Furthermore, the structure of the top frame can adopt various schemes and is not limited to one. Here, we optimize and propose one feasible option: the top frame includes a central fixed base, on which several support arms are arranged radially outward, and the outer ends of adjacent support arms are connected by hanging rods; the central fixed base has seat holes for the lifting points on the entire ring section to pass through. When adopting the above scheme, the lifting points of the entire ring section pass through the seat holes, while the top frame is attached to the upper end face of the entire ring section. The insulation device can be lifted simultaneously during the lifting of the entire ring section.

[0015] Furthermore, heating of the interior of the heating chamber can be achieved in various ways, and one feasible option is proposed here: the heating source includes an electric heater.

[0016] The above content discloses a construction insulation device, and the present invention also discloses a corresponding construction method.

[0017] A low-temperature hoisting construction method for wind turbine concrete towers, employing the aforementioned disclosed insulation device, includes: The entire ring section is obtained by assembling segments; A heat insulation device is installed on the entire ring section to cover the entire ring section; Structural adhesive is applied to the tower column, and then the entire ring section is hoisted to the tower column for installation, so that the structural adhesive fills the installation and bonding surface of the entire ring section. The entire ring section is wrapped and covered by a heat preservation device to form a heating chamber on the outside of the entire ring section. The temperature of the heating chamber is raised to a set temperature by the heat source of the heat preservation device to keep the entire ring section warm and maintain the warm state for a set time. After the insulation treatment is completed, remove the insulation device and repeat the above process.

[0018] Compared with the prior art, some of the beneficial effects of the technical solution disclosed in this invention include: Through insulation devices and construction methods, the entire ring section can be wrapped and covered, forming a heating chamber to heat the interior and provide a suitable temperature environment for the curing adhesive to cure, thereby realizing the assembly and construction of the entire ring section and enabling the construction of concrete towers under low-temperature conditions. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the components of the heat preservation device.

[0021] Figure 2 This is a schematic diagram of the hoisting of the entire ring cylinder section.

[0022] Figure 3 A schematic diagram showing the assembly of the entire ring cylinder section with the insulation device.

[0023] Figure 4 This is a schematic diagram showing the entire ring cylinder section covered by an insulation device.

[0024] The meanings of each component in the diagram are as follows: 1. Top frame; 101. Central fixing seat; 102. Support arm; 103. Hanging rod; 104. Covering layer; 2. Insulated enclosure; 3. Molded parts; 4. Heating source; 5. Connecting parts; 6. Lifting point; 7. Tightening line; 8. Tower column. Detailed Implementation

[0025] The following description, in conjunction with the accompanying drawings and specific embodiments, further illustrates this embodiment.

[0026] In view of the fact that low temperature environment affects the curing of adhesive during the construction of concrete towers, which is not conducive to the smooth construction of concrete towers, the following embodiments are optimized and overcome the defects of the existing technology.

[0027] Example 1 like Figures 1-4 As shown in the figure, this embodiment discloses a low-temperature hoisting construction insulation device for wind power concrete towers, including a top frame 1, which is used to cover the upper end face of the entire ring section. A covering layer 104 is formed on the top frame 1 and an observation area is provided. The covering layer 104 is provided with a hoisting hole for the hoisting point 6 to pass through. The top frame 1 is also connected to several downward-hanging insulation barriers 2. Adjacent insulation barriers 2 are connected to form a cylindrical barrier structure. A heating cavity is formed inside the barrier structure, and the entire ring section is covered in the heating cavity. The insulation device also includes a heating source 4 to maintain the temperature inside the heating cavity.

[0028] The insulation device disclosed in this embodiment is used to cover the entire ring section to be installed, forming an insulation and heating chamber. After the entire ring section is joined, insulation is performed to maintain the temperature inside the heating chamber within a suitable temperature range for the curing of the structural adhesive, thereby achieving the connection and fixation of the entire ring section. Even in low-temperature seasons and environments with sudden temperature drops, the installation of the concrete tower can be carried out normally, providing convenience for construction.

[0029] A cover layer 104 is provided above the heating chamber to ensure its airtightness and heating effect. To facilitate construction and connection, the cover layer 104 can be optimized. This embodiment adopts one feasible option: the cover layer 104 includes a top cover made of transparent material, which is connected and fixed to the top frame 1, and the connection is sealed. With this solution, the transparent top layer allows for direct observation of the connection of the entire ring section from the outside, and also facilitates observation of the curing of the internal structural adhesive. In some practical designs, the cover layer 104 can be made of transparent polyethylene material.

[0030] In some other solutions, an openable cover can be provided on the cover layer 104, allowing observation of the interior after opening the cover.

[0031] The insulated enclosure 2 is used to cover and wrap the entire ring section. Its installation method is not limited to a single method. This embodiment optimizes and adopts one feasible option: the upper edge of the insulated enclosure 2 is connected to the top frame 1, the lower edge of the insulated enclosure 2 hangs naturally, and adjacent insulated enclosures 2 are connected by connectors 5 to form an integral enclosure structure. When using the above scheme, after the insulated enclosure 2 forms an integral enclosure structure, it can cover one or multiple ring sections. Therefore, multiple ring sections can be covered by the integral enclosure and then heated and cured as a whole, thereby improving construction efficiency.

[0032] The thermal insulation enclosure 2 forms a heating chamber, maintaining the temperature within it to facilitate the curing of the adhesive and connect and fix adjacent cylindrical sections. The thermal insulation enclosure 2 can employ various structures; this embodiment optimizes and uses one feasible option: the thermal insulation enclosure 2 includes an outer layer and an inner layer. The outer layer is made of thermal insulation material, and the inner layer is made of wear-resistant and heat-insulating material. With this design, the outer layer of the thermal insulation enclosure 2 organizes heat convection between the inside and outside of the heating chamber, preventing internal heat loss. The inner layer directly contacts the entire ring of cylindrical sections, providing wear resistance and reflecting heat from inside the heating chamber inwards.

[0033] To better encircle the cylindrical section and improve the heating and insulation effect, the structure of the insulation barrier 2 needs to be optimized. This embodiment adopts one feasible option: a molded component 3 is provided along the lower edge of the insulation barrier 2. After adjacent insulation barriers 2 are spliced ​​together, the molded components 3 are joined together, ensuring the lower part of the barrier structure fits snugly against the entire cylindrical section. With this solution, the barrier structure can fit more tightly against the cylindrical section through the molded components 3, forming a stable covering and improving the heating effect within the heating chamber.

[0034] The molded component 3 can be constructed in various forms and is not limited to a single one. This embodiment optimizes and adopts one feasible option: a thread-passing structure is formed inside the molded component 3. When adjacent insulation barriers 2 are spliced ​​and connected, a tightening line 7 is set in the thread-passing structure to make the molded component 3 fit tightly against the outer wall surface of the entire ring section. When the above solution is adopted, the lower edge of the insulation barrier 2 can be tightly fitted to the cylinder section by the tightening line 7 and the molded component 3, avoiding gaps.

[0035] The connection structure of adjacent thermal insulation barriers 2 can adopt multiple schemes and is not limited to one. This embodiment optimizes and adopts one of the feasible options: the connector 5 includes at least a zipper, Velcro or connecting buckle provided on the side of the thermal insulation barrier 2.

[0036] The structure of the top frame 1 can adopt various schemes and is not limited to one. This embodiment optimizes and adopts one feasible option: the top frame 1 includes a central fixed seat 101, on which several support arms 102 are arranged radially outward, and the outer ends of adjacent support arms 102 are connected by hanging rods 103; a seat hole is formed on the central fixed seat 101, which is used to pass through the lifting point 6 on the entire ring section. When the above scheme is adopted, the lifting point 6 of the entire ring section passes through the seat hole, and the top frame 1 is attached to the upper end face of the entire ring section. The heat preservation device can be lifted simultaneously during the lifting of the entire ring section.

[0037] Heating inside the heating chamber can be achieved in various ways. In this embodiment, one feasible option is adopted: the heating source 4 includes an electric heater.

[0038] Example 2 The above content discloses the construction insulation device, and this embodiment discloses the corresponding construction method.

[0039] A low-temperature hoisting construction method for wind turbine concrete towers, employing the aforementioned disclosed insulation device, includes: S01. The entire ring section is obtained by assembling segments; S02. Install a heat insulation device on the entire ring section to cover the entire ring section; S03. Apply structural adhesive to tower column 8, and then hoist the entire ring section to tower column 8 for installation, so that the structural adhesive fills the installation and bonding surface of the entire ring section. S04. The entire ring section is wrapped and covered by the heat preservation device to form a heating chamber outside the entire ring section. The temperature of the heating chamber is raised to the set temperature through the heat source 4 of the heat preservation device to keep the entire ring section warm and maintain the heat preservation state for the set heat preservation time. S05. After completing the insulation treatment, remove the insulation device and repeat the above process.

[0040] The above are the embodiments listed in this example; however, this example is not limited to the optional embodiments described above; those skilled in the art can arbitrarily combine the above methods to obtain other various embodiments; anyone can derive other various forms of embodiments under the guidance of this example. The above specific embodiments should not be construed as limiting the scope of protection of this example; the scope of protection of this example should be determined by the claims.

Claims

1. A low-temperature hoisting and insulation device for wind power concrete towers, characterized in that: The device includes a top frame (1) for covering the upper surface of the entire ring section. A covering layer (104) is formed on the top frame (1) and an observation area is provided. A lifting hole is provided on the covering layer (104) for the lifting point (6) to pass through. The top frame (1) is also connected to several downward-hanging heat-insulating barriers (2). Adjacent heat-insulating barriers (2) are connected to form a cylindrical barrier structure. A heating cavity is formed inside the barrier structure, and the entire ring section is covered in the heating cavity. The heat-insulating device also includes a heating source (4) for maintaining the temperature inside the heating cavity.

2. The low-temperature hoisting and insulation device for wind power concrete towers according to claim 1, characterized in that: The cover (104) includes a top cover made of transparent material, which is connected and fixed to the top frame (1) and the connection is sealed.

3. The low-temperature hoisting and insulation device for wind power concrete towers according to claim 1, characterized in that: The upper edge of the insulated enclosure (2) is connected to the top frame (1), the lower edge of the insulated enclosure (2) hangs down naturally, and adjacent insulated enclosures (2) are connected by connectors (5) to form an overall enclosure structure.

4. The low-temperature hoisting and insulation device for wind power concrete towers according to claim 1 or 3, characterized in that: The insulated enclosure (2) includes an outer layer and an inner layer. The outer layer is made of thermal insulation material, and the inner layer is made of wear-resistant and heat-insulating material.

5. The low-temperature hoisting and insulation device for wind power concrete towers according to claim 1 or 3, characterized in that: The lower edge of the insulated enclosure (2) is provided with a molding part (3). After adjacent insulated enclosures (2) are spliced ​​and connected, the molding parts (3) are connected to each other and the lower part of the enclosure structure fits into the whole ring cylinder.

6. The low-temperature hoisting and insulation device for wind power concrete towers according to claim 5, characterized in that: The molded part (3) has a wire-passing structure inside. When the adjacent heat-insulating barriers (2) are spliced ​​and connected, a tightening line (7) is set in the wire-passing structure so that the molded part (3) is tightly attached to the outer wall surface of the entire ring section.

7. The low-temperature hoisting and insulation device for wind power concrete towers according to claim 3, characterized in that: The connector (5) includes at least a zipper, Velcro or fastener provided on the side of the insulation enclosure (2).

8. The low-temperature hoisting and insulation device for wind power concrete towers according to claim 1, characterized in that: The top frame (1) includes a central fixed seat (101), on which several support arms (102) are arranged radially outward, and the outer ends of adjacent support arms (102) are connected by hanging rods (103); a seat hole is formed on the central fixed seat (101), which is used to pass through the lifting point (6) on the whole ring cylinder section.

9. The low-temperature hoisting and insulation device for wind power concrete towers according to claim 1, characterized in that: The heating source (4) includes an electric heater.

10. A method for low-temperature hoisting construction of a wind power concrete tower, employing the insulation device as described in any one of claims 1 to 9, characterized in that, include: The entire ring section is obtained by assembling segments; A heat insulation device is installed on the entire ring section to cover the entire ring section; Structural adhesive is applied to the tower column (8), and then the entire ring section is hoisted to the tower column (8) for installation, so that the structural adhesive fills the installation and bonding surface of the entire ring section; The entire ring section is wrapped and covered by a heat preservation device to form a heating chamber outside the entire ring section. The temperature of the heating chamber is raised to the set temperature by the heat source (4) of the heat preservation device to keep the entire ring section warm and maintain the heat preservation state to achieve the set heat preservation time. After the insulation treatment is completed, remove the insulation device and repeat the above process.

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