An internal gas collection device for the core material curing stage of a wind turbine blade

Abstract

The utility model discloses an internal gas collection device in the curing and molding stage of the core material of a wind turbine blade, comprising an air extraction cavity arranged in a mold; a partition plate is arranged in the mold to divide the mold cavity into an upper air extraction cavity and a lower molding cavity; the partition plate comprises a middle grid plate; a breathable sleeve wrapped around the outer periphery of the grid plate; a breathable film is arranged on the breathable sleeve on the upper surface of the grid plate; a cavity is arranged at the top of the air extraction cavity; a plurality of air extraction holes are arranged on the lower surface of the cavity; an air extraction interface is arranged at the top of the cavity; the air extraction interface is connected to an air extraction pump through an air pipe; and a filling port is arranged at the bottom of the molding cavity. The utility model enables the gas in the filling system to be quickly discharged and improves the uniformity of air extraction.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind power generation, and in particular relates to an internal gas collection device in the curing and molding stage of a blade core material of a wind power generator. Background Art

[0002] As a low-cost, clean and low-carbon form of power generation, wind power generation has become a new favorite in countries around the world. The rapid development of the global wind power industry has driven the rapid development of wind turbines. As one of the key components of wind turbines, the performance of blades directly affects whether the unit can operate stably and normally.

[0003] As a large composite material, the production cycle and basic performance of wind turbine blades are closely related to the curing process of the resin. Under the premise of determining the resin and curing agent system, it is particularly important to select appropriate curing process conditions to shorten the curing cycle and obtain composite materials with suitable mechanical properties to obtain low-cost and high-quality blade products.

[0004] During vacuum infusion, it is necessary to evacuate the air in the infusion system and the gas dissolved in the infusion resin, especially the gas in the resin. Due to the influence of the sandwich structure, the gas is not easy to be discharged. Utility Model Content

[0005] In order to solve the above problems, the utility model provides an internal gas collection device during the curing and molding stage of the core material of a wind turbine blade, so as to quickly discharge the gas in the injection system and improve the uniformity of gas extraction.

[0006] The technical solution of the utility model is: an internal gas collection device in the curing and molding stage of the core material of a wind turbine blade, comprising an air extraction cavity arranged in a mold; a partition plate is arranged in the mold to divide the mold cavity into an upper air extraction cavity and a lower molding cavity;

[0007] The partition plate includes a middle-layer grid plate; a breathable sleeve wrapped around the outer periphery of the grid plate; a breathable membrane is arranged on the breathable sleeve on the upper surface of the grid plate; a cavity is arranged at the top of the vacuum cavity; a plurality of vacuum holes are arranged on the lower surface of the cavity; a vacuum interface is arranged at the top of the cavity; the vacuum interface is connected to a vacuum pump through an air pipe; and a filling port is arranged at the bottom of the molding cavity.

[0008] Furthermore, the air-permeable sleeve has openings at both ends; the grille plate extends into the air-permeable sleeve, with both ends of the grille plate exposed at the outer end of the air-permeable sleeve, and the openings at both ends of the air-permeable sleeve are sealed and connected to the grille plate through sealing strips.

[0009] Furthermore, the four sides of the breathable membrane are connected to the breathable sleeve via sealing strips.

[0010] Furthermore, a sealing tank is provided on the air pipe; a resin collecting tank is installed in the sealing tank; a connection port 1 and a connection port 2 are provided on the sealing tank; the connection port 1 is connected to the air extraction interface through the air pipe; and the connection port 2 is connected to the air extraction pump through the air pipe.

[0011] Furthermore, the sealed can comprises a can body and a cover body detachably connected to the can body; the cover body is provided with a first connection port and a second connection port.

[0012] The beneficial effects of the utility model are:

[0013] The utility model is provided with an air extraction cavity and a molding cavity, wherein the air extraction cavity is located above the molding cavity, and negative pressure causes the gas in the perfusion system to flow toward the air extraction cavity, and the backflow effect of the partition plate improves the uniformity of air extraction, so that the gas in the perfusion system is quickly discharged.

[0014] The utility model can collect liquid resin discharged together with gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of Example 1.

[0017] Figure 2 Schematic diagram of the partition plate.

[0018] Figure 3 This is a schematic diagram of the structure of Example 2. DETAILED DESCRIPTION

[0019] The technical solution of the utility model will be clearly and completely described below through specific implementation methods. Example

[0020] refer to Figure 1 and 2 , is an internal gas collection device for the curing and molding stage of the core material of a wind turbine blade of the utility model, comprising an air extraction cavity 11 arranged in a mold 1; a partition plate 2 is arranged in the mold 1 to divide the mold cavity into an upper air extraction cavity 11 and a lower molding cavity 12;

[0021] The partition plate 2 of this embodiment comprises a middle grid plate 201; a breathable sleeve 202 wrapped around the outer periphery of the grid plate 201; the breathable sleeve 202 has openings at both ends; the grid plate 201 extends into the breathable sleeve 202, the two ends of the grid plate 201 are exposed at the outer ends of the breathable sleeve 202, and the two openings of the breathable sleeve 202 are sealed and connected to the grid plate 201 through sealing strips. A breathable membrane 23 is provided on the breathable sleeve on the upper surface of the grid plate 201; the breathable membrane 23 of this embodiment is connected to the breathable sleeve 202 through sealing strips around the periphery.

[0022] In this embodiment, a cavity 13 is arranged at the top of the vacuum cavity 11; a plurality of vacuum holes 14 are arranged on the lower surface of the cavity 13; a vacuum interface 15 is arranged at the top of the cavity 13; the vacuum interface 15 is connected to a vacuum pump 16 via an air pipe 18; and a filling port 17 is arranged at the bottom of the molding cavity 12.

[0023] When the core material of the wind turbine blade of this embodiment is cured and formed, the core material is placed in a mold, glue is poured into the mold, and the vacuum pump is operated to evacuate the air, and the gas in the resin enters the vacuum chamber 11 and is then discharged.

[0024] The breathable sleeve of this embodiment is a sleeve body made of polyester fiber. The breathable membrane is a polypropylene membrane. Preferably, a breathable membrane 23 is also provided on the breathable sleeve on the lower surface of the grid plate 201.

[0025] This embodiment adopts the configuration of a breathable sleeve and a breathable membrane, which can generally prevent the resin from entering the air extraction cavity. Example

[0026] In this embodiment, a sealed tank 19 is provided on the air pipe 18; a resin collecting tank 20 is installed in the sealed tank 19; a connection port 1 21 and a connection port 2 22 are provided on the sealed tank 19; a guide pipe connected to the connection port 1 21 is provided in the sealed tank 19, and the guide pipe is located above the resin collecting tank 20. The connection port 1 21 is connected to the air extraction interface 15 through the air pipe 18; and the connection port 22 is connected to the air extraction pump 16 through the air pipe 18.

[0027] The sealed tank 19 comprises a tank body and a cover body detachably connected to the tank body; the cover body and the tank body are sealed and connected via a flange. A connection port 1 21 and a connection port 22 are provided on the cover body.

[0028] In this embodiment, a sealed tank 19 is provided, and a resin collecting tank 20 is provided in the sealed tank. When the air permeable membrane is damaged and fails, and the resin enters the air extraction cavity, the liquid resin extracted together with the gas can be effectively collected.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions should also be deemed to fall within the protection scope of the technical solution of the present invention.

Claims

1. A device for collecting internal gas during the curing and forming stage of the core material of a wind turbine blade, characterized in that: The invention comprises an air extraction cavity (11) arranged in a mold (1); a partition plate (2) is arranged in the mold (1) to divide the mold cavity into an upper air extraction cavity (11) and a lower molding cavity (12); the partition plate (2) comprises a middle grid plate (201); a breathable sleeve (202) wrapped around the outer periphery of the grid plate (201); a breathable film (23) is arranged on the breathable sleeve (202) on the upper surface of the grid plate (201); a cavity body (13) is arranged at the top of the air extraction cavity (11); a plurality of air extraction holes (14) are arranged on the lower surface of the cavity body (13); an air extraction interface (15) is arranged at the top of the cavity (13); the air extraction interface (15) is connected to an air extraction pump (16) via an air pipe (18); and a filling port (17) is arranged at the bottom of the molding cavity (12).

2. The internal gas collection device for the core material curing stage of a wind turbine blade according to claim 1, characterized in that: The air permeable sleeve (202) has openings at both ends; the grid plate (201) extends into the air permeable sleeve (202), and both ends of the grid plate (201) are exposed outside the air permeable sleeve (202); the openings at both ends of the air permeable sleeve (202) are sealed and connected to the grid plate (201) via sealing strips.

3. The internal gas collection device for the core material curing stage of a wind turbine blade according to claim 1, characterized in that: The four sides of the breathable membrane (23) are connected to the breathable sleeve (202) via sealing strips.

4. The internal gas collection device for the core material curing stage of a wind turbine blade according to claim 1, characterized in that: The air pipe (18) is provided with a sealing tank (19); a resin collecting tank (20) is installed in the sealing tank (19); a connection port 1 (21) and a connection port 2 (22) are provided on the sealing tank (19); the connection port 1 (21) is connected to the air extraction interface (15) through the air pipe (18); and the connection port 2 (22) is connected to the air extraction pump (16) through the air pipe (18).

5. The internal gas collection device for the core material curing stage of a wind turbine blade according to claim 4, characterized in that: The sealed can (19) comprises a can body and a cover body detachably connected to the can body; the cover body is provided with a first connection port (21) and a second connection port (22).

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