Pre-buried pipe structure of wind turbine tower foundation and construction method thereof

Abstract

The present invention discloses a pre-buried pipe structure of a wind turbine tower foundation and a construction method thereof, wherein the pre-buried pipe structure comprises a pre-buried pipe extending obliquely upward from the outside of the tower foundation through a casting area, a fireproof and waterproof material filled between the pre-buried pipe and the cable at both ends of the pre-buried pipe, and a plugging plate connected to the inner wall surface of the casting area and abutting against the inner port of the pre-buried pipe. This solution can effectively reduce the probability of groundwater backflow by arranging the pre-buried pipe in an inclined manner to form an inner and outer height difference; arranging fireproof and waterproof materials at both ends of the pre-buried pipe can prevent groundwater from flowing into the internal space of the tower foundation through the gap between the pre-buried pipe and the cable; and arranging a plugging plate at the inner port of the pre-buried pipe can further strengthen the sealing effect between the pre-buried pipe and the inner space of the tower foundation.

Description

Technical Field

[0001] The 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 and a construction method thereof. 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 of 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 and a construction method thereof.

[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 is formed into a hollow structure by a casting area and an internal space located in the center of the casting area, and the pre-buried pipe structure includes an embedded pipe extending obliquely upward from the outside of the tower foundation through the casting area, a fire-proof and waterproof material filled between the embedded pipe and the cable at both ends of the embedded pipe, and a sealing plate connected to the inner wall surface of the casting area and abutting against the inner port of the embedded pipe.

[0005] Furthermore, the embedded pipe structure also includes annular support members supported between the embedded pipe and the cable at both ends of the embedded pipe, wherein the inner end face of the inner support member is joined to the inner fireproof and waterproof material, and the outer end face of the outer support member is joined to the outer fireproof and waterproof material.

[0006] Furthermore, the outer end surface of the inner support member is coated with a fireproof and waterproof material, and the inner end surface of the outer support member is coated with a fireproof and waterproof material.

[0007] Furthermore, the outer circumferential surfaces at both ends of the embedded pipe are respectively sleeved with a plurality of evenly distributed expansion water stop strips.

[0008] Furthermore, the blocking plate is formed by splicing two steel plates, and each steel plate is provided with a threaded hole and a semicircular hole for passing the cable.

[0009] Furthermore, the fireproof and waterproof material is not less than 15 cm along the axial direction 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 upward from the outside to the inside to the inner space of the tower foundation;

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

[0013] S3. Install the cable so that it passes through the pre-buried pipe;

[0014] S4. Fill the inner and outer ends of the embedded pipe with fireproof and waterproof materials;

[0015] S5. Connect the blocking plate to the inner wall surface of the pouring area and apply sealant to the joint between the two.

[0016] Furthermore, before implementing step S1, the method further includes: bonding a plurality of expansion water stop strips to the outer circumferential surfaces of the inner and outer ends of the embedded pipe at intervals from each other.

[0017] Furthermore, the step S3 comprises:

[0018] S31, placing the inner support sleeve on the cable in the inner space;

[0019] S32, allowing the cable to enter from the inner port of the embedded pipe and pass through the outer port, and keeping the inner support member in the internal space;

[0020] S33, place the outer support sleeve on the cable passing through the outer port of the embedded pipe.

[0021] Furthermore, the step S4 comprises:

[0022] S41, coating the outer end surface of the inner support with a fireproof and waterproof material;

[0023] S42, push the inner support member into the pipe from the inner port of the embedded pipe so that the distance between the inner support member and the inner port of the embedded pipe is not less than 15 cm;

[0024] S43, filling the embedded pipe with fireproof and waterproof material until the inner end of the embedded pipe;

[0025] S44. Process the outer support members and fill them with fireproof and waterproof materials according to steps similar to the above steps S41-S43.

[0026] This scheme can effectively reduce the probability of groundwater backflow by arranging the embedded pipes in an inclined manner to form a height difference between the inside and outside. Fire-proof and waterproof materials are arranged at both ends of the embedded pipes to prevent groundwater from flowing into the internal space of the tower foundation through the gap between the embedded pipes and the cables. A plugging plate is arranged at the port of the embedded pipe to further enhance the sealing effect between the embedded pipe and the internal space of the tower foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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,

[0028] Figure 1 It is a structural schematic diagram of a tower foundation pre-buried pipe structure of the prior art;

[0029] Figure 2 It is a schematic plan view of a pre-buried pipe structure for a tower foundation according to an embodiment of the present invention;

[0030] Figure 3 for Figure 2 A partial enlarged view of part Ⅰ in FIG.

[0031] Figure 4 for Figure 2 A partial enlarged view of part II in FIG.

[0032] Figure 5 It is a three-dimensional schematic diagram of the pre-buried pipe structure of the tower foundation according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] 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.

[0034] 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.

[0035] 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.

[0036] The present invention provides a pre-buried pipe structure for a wind turbine tower foundation of a wind turbine, such as Figure 2-5As shown, the tower foundation is formed of a hollow structure by a casting area and an internal space located in the center of the casting area. The embedded pipe structure includes an embedded pipe 1 extending obliquely upward from the outside of the tower foundation through the casting area, fireproof and waterproof materials 2a, 3a filled between the embedded pipe 1 and the cable 9 at both ends of the embedded pipe 1, and a plugging plate 4 connected to the inner wall surface of the casting area and abutting against the inner port of the embedded pipe 1. The embedded pipe is arranged obliquely in the above manner to form an internal and external height difference to reduce the probability of groundwater backflow; the fireproof and waterproof materials are arranged at both ends of the embedded pipe to prevent groundwater from flowing into the internal space of the tower foundation through the gap between the embedded pipe and the cable; the plugging plate is arranged at the inner port of the embedded pipe to further enhance the sealing effect between the embedded pipe and the internal space of the tower foundation.

[0037] According to an embodiment of the present invention, the embedded pipe structure further includes annular support members 5 and 6 supported between the embedded pipe 1 and the cable 9 at both ends of the embedded pipe 1, wherein the inner end face of the inner support member 5 is engaged with the inner fireproof and waterproof material 2a, and the outer end face of the outer support member 6 is engaged with the outer fireproof and waterproof material 3a. In addition, the outer end face of the inner support member 5 is coated with a fireproof and waterproof material 2b, and the inner end face of the outer support member 6 is coated with a fireproof and waterproof material 3b. The annular support members provided at both ends of the embedded pipe can form a uniform annular gap between the embedded pipe and the cable, which is conducive to forming a uniform fireproof and waterproof material section. The support member can be a fireproof gypsum board or a flame-retardant rubber gasket; the fireproof and waterproof material can be a sealant or coating with fireproof and waterproof properties. On the basis of the above scheme, in order to prevent water seepage around the embedded pipe, the outer peripheral surfaces of the inner and outer ends of the embedded pipe 1 can be respectively provided with a plurality of uniformly distributed expansion water stop strips 7. In addition, the blocking plate 4 can be formed by splicing two steel plates, each of which is provided with a threaded hole 41 and a semicircular hole 42. After the two steel plates are spliced ​​together, the two semicircular holes 42 are combined to form a circular hole for the cable 9 to pass through.

[0038] The present invention also provides a method for constructing a pre-buried pipe structure, comprising the following steps:

[0039] S1, arranging the embedded pipe 1 so that it extends obliquely upward from the outside of the tower foundation through the casting area;

[0040] S2. Cast and maintain the tower foundation;

[0041] S3, installing the cable 9 so that it passes through the embedded pipe 1;

[0042] S4, filling fireproof and waterproof materials 2a and 3a at both ends of the embedded pipe 1;

[0043] S5. Connect the blocking plate 4 to the inner wall surface of the casting area by means of screws 8 and apply sealant 10 to the joints, including the joints between the blocking plate and the side wall of the inner space, the joints between the blocking plate and the cable, and the screw joints.

[0044] In order to prevent groundwater from infiltrating, before implementing step S1, a plurality of expansion water stop strips 7 may be bonded to the outer circumferential surfaces of the inner and outer ends of the embedded pipe 1 at intervals from each other.

[0045] According to a preferred embodiment of the present invention, step S3 comprises:

[0046] S31, sleeve the inner support member 5 onto the cable 9 in the inner space;

[0047] S32, allowing the cable 9 to enter from the inner port of the embedded pipe 1 and pass through the outer port, and keeping the inner support member 5 in the internal space;

[0048] S33, the outer support member 6 is placed on the cable 9 passing through the outer port of the embedded pipe 1.

[0049] Further, step S4 includes:

[0050] S41, coating the outer end surface of the inner support member 5 with a fireproof and waterproof material 2b having a thickness of 2-3 mm;

[0051] S42, push the inner support member 5 into the pipe from the inner end of the embedded pipe 1, so that the distance between the inner support member 5 and the inner end of the embedded pipe 1 is not less than 15 cm;

[0052] S43, filling the embedded pipe 1 with fireproof and waterproof material 2a until the inner end of the embedded pipe 1;

[0053] S44. Process the outer support member 6 and fill it with fireproof and waterproof material 3a according to steps similar to the above steps S41-S43.

[0054] 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 for a wind turbine tower foundation, wherein the tower foundation is a hollow structure formed by a casting area and an internal space located in the center of the casting area, characterized in that: The embedded pipe structure comprises an embedded pipe (1) extending obliquely upward from the outside of the tower foundation and penetrating the casting area, fireproof and waterproof materials (2a, 3a) filled between the embedded pipe (1) and the cable (9) at both ends of the embedded pipe (1), and a sealing plate (4) connected to the inner wall surface of the casting area and abutting against the inner port of the embedded pipe (1).

2. The embedded pipe structure according to claim 1, characterized in that: The embedded pipe structure also includes annular support members (5, 6) supported between the embedded pipe (1) and the cable (9) at both ends of the embedded pipe (1), wherein the inner end surface of the inner support member (5) is connected to the inner fireproof and waterproof material (2a), and the outer end surface of the outer support member (6) is connected to the outer fireproof and waterproof material (3a).

3. The embedded pipe structure according to claim 2, characterized in that: The outer end surface of the inner support member (5) is coated with a fireproof and waterproof material (2b), and the inner end surface of the outer support member (6) is coated with a fireproof and waterproof material (3b).

4. The embedded pipe structure according to claim 1, characterized in that: The outer circumferential surfaces of the inner and outer ends of the embedded pipe (1) are respectively sleeved with a plurality of evenly distributed expansion water stop strips (7).

5. The embedded pipe structure according to claim 1, characterized in that: The blocking plate (4) is formed by splicing two steel plates, and each steel plate is provided with a threaded hole and a semicircular hole for the cable (9) to pass through.

6. The embedded pipe structure according to any one of claims 1 to 5, characterized in that: The fireproof and waterproof material (2a, 3a) is not less than 15 cm along the axial direction of the embedded pipe.

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 and penetrates the casting area; S2. Cast and maintain the tower foundation; S3, installing the cable (9) so that it passes through the pre-buried pipe (1); S4, filling fireproof and waterproof materials (2a, 3a) at both inner and outer ends of the embedded pipe (1); S5. Connect the blocking plate (4) to the inner wall surface of the pouring area and apply sealant (10) to the joint between the two.

8. The method according to claim 7, characterized in that Before implementing step S1, the method further includes: bonding a plurality of expansion water stop strips (7) to the outer circumferential surfaces of the inner and outer ends of the embedded pipe (1) at intervals from each other.

9. The method according to claim 7, characterized in that: The step S3 comprises: S31, placing the inner support member (5) on the cable (9) in the inner space; S32, allowing the cable (9) to enter from the inner port of the embedded pipe (1) and pass through the outer port, and keeping the inner support member (5) in the internal space; S33, the outer support member (6) is placed on the cable (9) passing through the outer port of the embedded pipe (1).

10. The method according to claim 9, characterized in that The step S4 comprises: S41, coating the outer end surface of the inner support member (5) with a fireproof and waterproof material (2b); S42, push the inner support member (5) into the inner end of the pre-buried pipe (1) so that the distance between the inner support member (5) and the inner end of the pre-buried pipe (1) is not less than 15 cm; S43, filling the fireproof and waterproof material (2a) into the embedded pipe (1) until the inner end of the embedded pipe (1); S44. Process the outer support member (6) and fill it with fireproof and waterproof material (3a) according to steps similar to the above steps S41-S43.

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