Embedded pipe structure of wind turbine generator tower foundation, construction method and wind turbine generator

Abstract

The invention discloses an embedded pipe structure of a wind turbine generator tower foundation, a construction method and a wind turbine generator, the tower foundation comprises a pouring area with a hollow internal space and a cover plate arranged above the internal space, and the embedded pipe structure comprises an embedded pipe which obliquely extends upwards from outside to inside and penetrates through the pouring area into the internal space; the connecting pipe is located in the inner space and is of a bent structure, a lower port of the connecting pipe is detachably connected with an inner port, located in the inner space, of the embedded pipe, an upper port of the connecting pipe upwards extends out of the inner space through the cover plate, and an outer port, located outside the tower foundation, of the embedded pipe and the upper port of the connecting pipe are filled with fireproof sealants respectively. According to the scheme, on the basis that the embedded pipe is obliquely arranged in the mode, the connecting pipe which is communicated with the embedded pipe and adopts the bending design is additionally arranged in the internal space, so that a large height difference is formed at the two ends of the pipe fitting, and the probability of underground water backflow can be remarkably reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a pre-buried pipe structure of a wind turbine tower foundation, a construction method and a wind turbine. Background Art

[0002] At present, the cable pre-buried pipes of the steel-concrete tower hollow foundation of wind turbine generator sets are arranged in a straight line. At the same time, the waterproof materials used are flame-retardant polyurethane foaming agent and fire-proof mastic for sealing and waterproofing. See the attached Figure 1 . Flame-retardant polyurethane foaming agent and fireproof mortar can play a good fireproof effect, but the waterproof performance is poor, which leads to the backflow of groundwater through the embedded pipe into the hollow foundation and water seepage around the embedded pipe, affecting the durability and stability of the hollow foundation. At the same time, the water accumulation in the tower will produce water vapor and affect the normal operation of electrical equipment. Therefore, a new embedded pipe structure and construction method for the wind turbine tower foundation is urgently needed to solve the above problems. Summary of the invention

[0003] The purpose of the present invention is to solve the problems existing in the prior art and to provide a pre-buried pipe structure of a wind turbine tower foundation, a construction method and a wind turbine.

[0004] In order to achieve the above-mentioned purpose, the present invention proposes a pre-buried pipe structure for a wind turbine tower foundation, wherein the tower foundation includes a casting area with a hollow internal space and a cover plate arranged above the internal space, the pre-buried pipe structure includes a pre-buried pipe extending upward and obliquely from the outside to the inside, penetrating the casting area to the internal space, and a connecting pipe with a bending configuration located in the internal space, the lower port of the connecting pipe is detachably connected to the inner port of the pre-buried pipe located in the internal space, the upper port of the connecting pipe extends upward from the internal space via the cable hole of the cover plate, and the outer port of the pre-buried pipe located outside the tower foundation and the upper port of the connecting pipe are respectively filled with fire-proof sealant.

[0005] Furthermore, the embedded pipe structure also includes a half joint, and the lower port of the connecting pipe and the inner port of the embedded pipe are connected through the half joint.

[0006] Furthermore, the inner port of the embedded pipe and the lower port of the connecting pipe are respectively provided with flanges matching each other.

[0007] Furthermore, the outer circumferential surface of the section of the embedded pipe located in the casting area and close to the internal space is sheathed with a plurality of evenly distributed expansion water stop strips.

[0008] Furthermore, the embedded pipe structure also includes a bracket located in the internal space and gradually increasing in height along the direction of the connecting pipe.

[0009] Furthermore, the height difference between the upper and lower ports of the connecting pipe is greater than the height difference between the inner and outer ports of the embedded pipe.

[0010] The present invention also provides a method for constructing the embedded pipe structure of the wind turbine tower foundation, comprising the following steps:

[0011] S1. Arrange the embedded pipes so that they extend obliquely upward from the outside of the tower foundation, penetrate the casting area and reach the internal space;

[0012] S2. Cast and maintain the tower foundation;

[0013] S3. Make and arrange the connecting pipe according to the wiring method of the cable, and make the cable pass through the connecting pipe and the embedded pipe in sequence;

[0014] S4. Connect the lower port of the connecting pipe to the inner port of the embedded pipe, pass the upper port through the cover plate of the tower foundation, and fix the connecting pipe;

[0015] S5. Fill the outer port of the embedded pipe and the upper port of the connecting pipe with fireproof sealant respectively.

[0016] Furthermore, the step S4 includes: docking the lower port of the connecting pipe with the inner port of the embedded pipe and pasting a water stop strip at the joint, and completing the connection through a half joint.

[0017] Furthermore, the step S4 includes: gluing rubber pads to the connection surfaces of the flange of the embedded pipe inner port and the flange of the lower port of the connecting pipe, respectively, and connecting the two flanges to each other by bolts.

[0018] The present invention also provides a wind turbine generator set, which comprises the above-mentioned embedded pipe structure.

[0019] This solution, on the basis of arranging the embedded pipe in an inclined manner as described above, adds a connecting pipe in the internal space that is connected to the embedded pipe and adopts a bending design, thereby forming a large height difference at both ends of the pipe, which can significantly reduce the probability of groundwater backflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following drawings of the present invention are used as part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the device and principle of the present invention. In the drawings,

[0021] Figure 1 It is a structural schematic diagram of a tower foundation pre-buried pipe structure of the prior art;

[0022] Figure 2 It is a structural schematic diagram of a pre-buried pipe structure for a tower foundation according to an embodiment of the present invention;

[0023] Figure 3 for Figure 2 The first form of the three-dimensional structure diagram of Part I;

[0024] Figure 4 for Figure 2 The second form of the three-dimensional structure diagram of part I in . DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. The described embodiments are only preferred embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] It should be understood that, unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The purpose of the terms used herein is only to describe specific embodiments and is not intended to limit the present invention. Terms such as "parts" and "pieces" that appear in this article can represent both single parts and combinations of multiple parts. The singular forms of "one", "an" and "said / the" are also intended to include plural forms unless the context clearly indicates otherwise. Ordinal numbers such as "first" and "second" are merely identifiers and do not have any other meaning, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of a "second component", and the term "second component" itself does not imply the existence of a "first component". When the terms "comprising" and / or "including" are used in this specification, it indicates the presence of the features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof. The terms "upper", "lower", "front", "back", "left", "right", "inside", "outside", "center", "vertical", "horizontal" and similar expressions are for illustrative purposes only and are not limiting. The terms "connect", "install", "connected", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The features described in this document in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0027] Hereinafter, specific embodiments of the present invention will be described in more detail with reference to the accompanying drawings. These drawings show representative embodiments of the present invention and do not limit the present invention.

[0028] The present invention provides a pre-buried pipe structure for a wind turbine tower foundation of a wind turbine. Figure 2-4 As shown, the tower foundation includes a casting area with a hollow internal space and a cover plate arranged above the internal space, and the embedded pipe structure includes an embedded pipe 1 extending upward from the outside to the inside and passing through the casting area to the internal space, and a connecting pipe 2 with a bent configuration located in the internal space, the lower port of the connecting pipe 2 is detachably connected to the inner port of the embedded pipe 1 located in the internal space, the upper port of the connecting pipe 2 extends upward from the internal space through the cable hole of the cover plate, and the outer port of the embedded pipe 1 located outside the tower foundation and the upper port of the connecting pipe 2 are respectively filled with fireproof sealant 3. On the basis of arranging the embedded pipe in an inclined manner in the above manner, a connecting pipe connected to the embedded pipe and with a bent design is added in the internal space, thereby forming a large height difference at both ends of the pipe fitting, which can significantly reduce the probability of groundwater backflow. Preferably, the height difference between the upper and lower ports of the connecting pipe 2 is greater than the height difference between the inner and outer ports of the embedded pipe 1. Due to the position of the inner and outer ports and the embedded depth of the embedded pipe 1, the inclination angle should not exceed 5°. Therefore, the height difference between the upper and lower ports of the connecting pipe 2 is increased as much as possible to increase the overall height difference of the pipe fitting. The lower port of the connecting pipe 2 is located near the bottom of the internal space, and the upper port is located above the cover plate. Therefore, the height difference between the upper and lower ports is close to the height of the entire internal space. A bracket 9 that gradually increases along the direction of the connecting pipe 2 is provided in the internal space to support the connecting pipe 2.

[0029] According to an embodiment of the present invention, the lower port of the connecting pipe 2 and the inner port of the embedded pipe 1 can be directly connected through the half joint 4; or, the inner port of the embedded pipe 1 and the lower port of the connecting pipe 2 can be respectively provided with mutually matching flanges 5 and 6, and connected by flanges. In addition, in order to prevent water seepage around the embedded pipe, the outer peripheral surface of the section of the embedded pipe 1 located in the casting area and close to the internal space is provided with a plurality of evenly distributed expansion water stop strips 7.

[0030] The present invention also provides a method for constructing a pre-buried pipe structure, comprising the following steps:

[0031] S1, arrange the embedded pipe 1 so that it extends obliquely upward from the outside of the tower foundation, penetrates the casting area and reaches the internal space;

[0032] S2. Cast and maintain the tower foundation;

[0033] S3, making and arranging the connecting pipe 2 according to the wiring mode of the cable 9, and making the cable 9 pass through the connecting pipe 2 and the embedded pipe 1 in sequence;

[0034] S4, connect the lower port of the connecting pipe 2 to the inner port of the embedded pipe 1, pass the upper port through the cover plate of the tower foundation, and fix the connecting pipe 2;

[0035] S5. Fill the outer port of the embedded pipe 1 and the upper port of the connecting pipe 2 with fireproof sealant 3 respectively.

[0036] The above-mentioned step S4 may include: docking the lower port of the connecting pipe 2 with the inner port of the embedded pipe 1 and pasting a water stop strip at the joint, setting a rubber pad at the connecting plate of the two half joint bodies, and connecting the two half joint bodies by bolts; or, pasting rubber pads on the connecting surfaces of the flange 5 of the inner port of the embedded pipe 1 and the flange 6 of the lower port of the connecting pipe 2, and connecting the flange 5 and the flange 6 to each other by bolts.

[0037] In addition, before implementing step S1, an expansion water stop strip 7 can be pasted near the inner port of the embedded pipe 1 so that the expansion water stop strip 7 is located in the casting area of ​​the tower foundation after the embedded pipe 1 is arranged to prevent groundwater infiltration.

[0038] The present invention has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and description, and are not intended to limit the present invention to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the present invention is not limited to the above-mentioned embodiments, and more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of the protection claimed by the present invention. The protection scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A pre-buried pipe structure of a wind turbine tower foundation, the tower foundation comprising a casting area with a hollow internal space and a cover plate arranged above the internal space, characterized in that: The embedded pipe structure comprises an embedded pipe (1) extending upwardly and obliquely from the outside to the inside, penetrating the casting area to the internal space, and a connecting pipe (2) located in the internal space and having a bent configuration, wherein the lower port of the connecting pipe (2) is detachably connected to the inner port of the embedded pipe (1) located in the internal space, and the upper port of the connecting pipe (2) extends upwardly out of the internal space via the cable hole of the cover plate, and the outer port of the embedded pipe (1) located outside the tower foundation and the upper port of the connecting pipe (2) are respectively filled with fireproof sealant (3).

2. The embedded pipe structure according to claim 1, characterized in that: The embedded pipe structure further comprises a half joint (4), and the lower port of the connecting pipe (2) and the inner port of the embedded pipe (1) are connected via the half joint (4).

3. The embedded pipe structure according to claim 1, characterized in that: The inner port of the embedded pipe (1) and the lower port of the connecting pipe (2) are respectively provided with flanges (5, 6) that match each other.

4. The embedded pipe structure according to claim 1, characterized in that: The outer circumferential surface of the section of the embedded pipe (1) located in the casting area and close to the internal space is sheathed with a plurality of evenly distributed expansion water stop strips (7).

5. The embedded pipe structure according to claim 1, characterized in that: The embedded pipe structure also includes a bracket (8) located in the internal space and gradually increasing in height along the direction of the connecting pipe (2).

6. The embedded pipe structure according to any one of claims 1 to 5, characterized in that: The height difference between the upper and lower ports of the connecting pipe (2) is greater than the height difference between the inner and outer ports of the embedded pipe (1).

7. A method for constructing a pre-buried pipe structure of a wind turbine tower foundation according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1, arranging the embedded pipe (1) so that it extends obliquely upward from the outside of the tower foundation, penetrates the casting area and reaches the internal space; S2. Cast and maintain the tower foundation; S3, manufacturing and arranging the connecting pipe (2) according to the wiring method of the cable (9), and making the cable (9) pass through the connecting pipe (2) and the embedded pipe (1) in sequence; S4, connecting the lower port of the connecting pipe (2) to the inner port of the embedded pipe (1), passing the upper port through the cover plate of the tower foundation, and fixing the connecting pipe (2); S5. Fill the outer port of the embedded pipe (1) and the upper port of the connecting pipe (2) with fireproof sealant (3) respectively.

8. The method according to claim 7, characterized in that The step S4 comprises: docking the lower port of the connecting pipe (2) and the inner port of the embedded pipe (1) and pasting a water stop strip at the joint, and completing the connection through a half joint (4).

9. The method according to claim 7, characterized in that: The step S4 comprises: gluing rubber pads to the connection surfaces of the flange (5) at the inner port of the embedded pipe (1) and the flange (6) at the lower port of the connecting pipe (2), and connecting the flange (5) and the flange (6) to each other by bolts.

10. A wind turbine generator set, characterized in that: The wind turbine generator set comprises the embedded pipe structure as described in any one of claims 1-6.

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