Offshore wind power dry-type transformer with outer insulating cylinder convenient to disassemble and assemble

Abstract

The utility model discloses an offshore wind power dry-type transformer with outer insulating cylinders convenient to disassemble and assemble, which comprises a base, at least three coils and a fixing seat, the lower ends of all the coils are arranged on the base, each base is sleeved with the outer insulating cylinder, and each coil is provided with an external boss; the fixed seat is positioned on the upper sides of the coils and is fixedly connected with all the coils; wherein in each outer insulating cylinder, the outer insulating cylinder comprises a first half cylinder piece and a second half cylinder piece, the opposite edges of the first half cylinder piece and the second half cylinder piece are detachably connected through a connecting piece, and a first avoiding groove is formed in the edge, opposite to the second half cylinder piece, of the first half cylinder piece; a second avoiding groove is formed in the edge, opposite to the first half cylinder part, of the second half cylinder part, the first avoiding groove and the second avoiding groove are in butt joint to form an avoiding hole, and the external boss penetrates through the corresponding avoiding hole. According to the offshore wind power dry-type transformer provided by the utility model, the outer insulating cylinder is more convenient to replace and maintain, the aerial operation is less, and the construction is safer.

Description

Technical Field

[0001] The utility model relates to an offshore wind power dry-type transformer, in particular to an offshore wind power dry-type transformer with an outer insulating cylinder that is convenient to assemble and disassemble. Background Art

[0002] To withstand the harsh offshore climate, offshore wind turbine dry-type transformers require their coils to be protected within a highly corrosion-resistant casing. During operation, the coils and core generate significant heat, which can be severely damaged if not dissipated promptly. To address this, a heat sink is installed on the casing, along with a deflector assembly inside. Furthermore, an outer insulation barrel is placed around each coil. This deflector assembly directs more cooling air into the coils, removing heat and improving heat dissipation efficiency. Conventional offshore wind turbine dry-type transformers feature a complete cylindrical outer insulation barrel that completely encloses the entire coil and its external bosses for connecting to the conductive rods. This results in a relatively large outer insulation barrel. Furthermore, during transformer assembly, multiple coils are typically mounted on a base, then the outer insulation barrel is hoisted and inserted into the coils from above. Finally, a top bracket is attached to the top of the coils to secure the coils together. This requires hoisting, making installation inconvenient. Furthermore, maintenance requires removing the brackets and other components on the coils' upper sides before the outer insulation barrel can be lifted out, making it difficult to repair. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an offshore wind power dry-type transformer with an easily disassembled outer insulation barrel, which makes replacement and maintenance of the outer insulation barrel more convenient.

[0004] According to an embodiment of the present invention, an offshore wind power dry-type transformer with an outer insulating cylinder that is easy to disassemble and assemble comprises a base, at least three coils and a fixing seat, the lower ends of all the coils are installed on the base, each of the bases is sleeved with an outer insulating cylinder, and the coils are provided with an external boss; the fixing seat is located on the upper side of the coil, and the fixing seat is fixedly connected to all the coils; wherein, in each of the outer insulating cylinders, the outer insulating cylinder comprises a first half-cylinder and a second half-cylinder, the first half-cylinder and the second half-cylinder are enclosed to form an accommodating hole for accommodating the corresponding coil, the opposite edges of the first half-cylinder and the second half-cylinder are detachably connected by a connecting piece, a first avoidance groove is provided on the edge of the first half-cylinder relative to the second half-cylinder, a second avoidance groove is provided on the edge of the second half-cylinder relative to the first half-cylinder, the first avoidance groove and the second avoidance groove are connected to form an avoidance hole, and the external boss is passed through the corresponding avoidance hole.

[0005] According to some embodiments of the present invention, in each of the outer insulating cylinders, upper and lower ends of the opposite edges of the first half-cylinder and the second half-cylinder are detachably connected via a connecting member.

[0006] According to some embodiments of the present invention, the connecting member is connected to the corresponding edge of the first semi-cylinder member through bolts, and the connecting member is connected to the corresponding edge of the second semi-cylinder member through bolts.

[0007] According to some embodiments of the present invention, a clamping portion is provided at one end of the connecting member, a first limiting groove is provided in the clamping portion, the first limiting groove is arc-shaped, and in each of the outer insulating cylinders, the first half-cylinder member and the second half-cylinder member are inserted into the first limiting groove.

[0008] According to some embodiments of the present invention, the cross-sectional shape of the first semi-cylindrical member and the cross-sectional shape of the second semi-cylindrical member are semicircular arc shapes.

[0009] According to some embodiments of the present invention, a first pad is provided between the base and each of the coils, the first pad is provided with a second limiting groove, the lower end of the outer insulating tube is inserted into the second limiting groove, and the second limiting groove is located on the side wall outside the outer insulating tube and is removable.

[0010] According to some embodiments of the present invention, a second pad is provided between the fixing seat and each of the coils, the second pad is provided with a third limiting groove, the upper end of the outer insulating tube is inserted into the third limiting groove, and the second limiting groove is located on the side wall outside the outer insulating tube and is removable.

[0011] According to some embodiments of the present invention, four first pads are arranged between the base and each of the coils, and the first pads are provided with second limiting grooves, wherein, in each of the outer insulating cylinders, the first half-cylinder part and the second half-cylinder part are elastic, and the front and rear ends of the lower edge of the first half-cylinder part and the front and rear ends of the lower edge of the second half-cylinder part are inserted into the corresponding second limiting grooves of the four first pads one by one.

[0012] According to some embodiments of the present invention, four second pads are arranged between the fixed seat and each of the coils, and the second pads are provided with a third limiting groove, wherein, in each of the outer insulating cylinders, the front and rear ends of the upper edge of the first semi-cylinder part and the front and rear ends of the upper edge of the second semi-cylinder part are inserted into the third limiting grooves of the corresponding four second pads one by one.

[0013] An offshore wind power dry-type transformer with an easily disassembled outer insulation cylinder according to an embodiment of the present invention has at least the following beneficial effects:

[0014] (1) In the offshore wind power dry-type transformer provided by the present invention, the outer insulating cylinder is divided into a first half cylinder and a second half cylinder, and the first half cylinder and the second half cylinder are detachably connected, and an avoidance hole for inserting the external boss of the coil is opened between the first half cylinder and the second half cylinder. Therefore, during assembly, the outer insulating cylinder can be assembled by manual transportation, and the first half cylinder and the second half cylinder are connected together by a connecting piece. After assembly, the external boss on the coil is inserted into the avoidance hole, which does not affect the connection between the external bosses of the two adjacent coils, thereby improving production efficiency and making the design more humane. When the outer insulating cylinder is subsequently replaced and repaired, the first half cylinder and the second half cylinder can be replaced and disassembled without disassembling the fixing seat, reducing the operation of hoisting the fixing seat and the outer insulating cylinder, making it more convenient to disassemble and repair the outer insulating cylinder, and reducing aerial work and making construction safer.

[0015] (2) Compared with the prior art solution in which the outer insulating tube integrally covers the coil and its external boss, the outer insulating tube in the present invention is provided with an avoidance hole for the external boss of the coil to pass through. As a result, the overall outer diameter of the outer insulating tube is smaller, which is conducive to reducing the distance between two adjacent coils, thereby reducing no-load loss, improving transformer efficiency, reducing transformer weight and size, and being suitable for installation in increasingly smaller towers, which is in line with industry development trends;

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of an offshore wind power dry-type transformer with an easily disassembled outer insulation cylinder according to an embodiment of the utility model;

[0019] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 for Figure 1 Enlarged view of point B in the middle;

[0021] Figure 4 for Figure 1 An exploded view of the outer insulation cylinder of an offshore wind power dry-type transformer with an easily disassembled outer insulation cylinder is shown;

[0022] Figure 5 for Figure 1 A schematic diagram of a connector for an offshore wind power dry-type transformer with an outer insulating cylinder that is easy to disassemble and assemble is shown.

[0023] Reference numerals:

[0024] Base 100, coil 200, external boss 210, fixing seat 300, outer insulating tube 400 first half-cylinder 400a, second half-cylinder 400b, accommodating hole 410, avoidance hole 420, first avoidance groove 421, second avoidance groove 422, connecting part 500, clamping part 510, first limiting groove 520, first pad 610, second limiting groove 611, second pad 620, third limiting groove 621, conductive rod 700. DETAILED DESCRIPTION

[0025] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0026] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They 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 orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0027] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0028] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0029] Reference Figure 1According to an embodiment of the present invention, an offshore wind power dry-type transformer with an outer insulating cylinder that is easy to disassemble and assemble comprises a base 100, at least three coils 200 and a fixing seat 300. The lower ends of all coils 200 are mounted on the base 100. Each base 100 is sleeved with an outer insulating cylinder 400. The coil 200 is provided with an external boss 210. The fixing seat 300 is located on the upper side of the coil 200 and is fixedly connected to all coils 200. In each outer insulating cylinder 400, the outer insulating cylinder 400 comprises a first half-cylinder 400a and a second half-cylinder 400b. The first half-cylinder 400a is provided with a second half-cylinder 400b. 00a and the second half-cylinder 400b are enclosed to form an accommodating hole 410 for accommodating the corresponding coil 200. The opposite edges of the first half-cylinder 400a and the second half-cylinder 400b are detachably connected through a connecting piece 500. A first avoidance groove 421 is provided on the edge of the first half-cylinder 400a relative to the second half-cylinder 400b, and a second avoidance groove 422 is provided on the edge of the second half-cylinder 400b relative to the first half-cylinder 400a. The first avoidance groove 421 and the second avoidance groove 422 are connected to form an avoidance hole 420, and the external boss 210 is passed through the corresponding avoidance hole 420.

[0030] In the offshore wind power dry-type transformer provided by the present invention, the outer insulating cylinder 400 is divided into a first half cylinder 400a and a second half cylinder 400b, and the first half cylinder 400a and the second half cylinder 400b are detachably connected. A avoidance hole 420 for inserting the external boss 210 of the coil 200 is provided between the first half cylinder 400a and the second half cylinder 400b. Therefore, during assembly, the outer insulating cylinder 400 can be assembled by manual handling, and the first half cylinder 400a and the second half cylinder 400b are connected by the connecting piece 500. b are connected together. After the assembly is completed, the external boss 210 on the coil 200 is inserted into the avoidance hole 420, which does not affect the connection between the external bosses 210 of the two adjacent coils 200 and the conductive rod 700, thereby improving production efficiency and making the design more humane. When the outer insulating cylinder 400 is subsequently replaced and repaired, the first half-cylinder 400a and the second half-cylinder 400b can be replaced and disassembled without disassembling the fixing seat 300, reducing the operation of hoisting the fixing seat 300 and the outer insulating cylinder 400, making it more convenient to disassemble and repair the outer insulating cylinder 400, and less aerial work, and safer construction.

[0031] Compared with the solution in the prior art in which the outer insulating cylinder 400 integrally covers the coil 200 and its external boss 210, the outer insulating cylinder 400 in the utility model is provided with an avoidance hole 420 for the external boss 210 of the coil 200 to pass through. As a result, the overall outer diameter of the outer insulating cylinder 400 is smaller, which is conducive to reducing the distance between two adjacent coils 200, thereby reducing no-load loss, improving transformer efficiency, reducing transformer weight and size, and being suitable for installation in increasingly smaller towers, which is in line with industry development trends.

[0032] Reference Figures 1 to 4 According to some embodiments of the present invention, in each outer insulating tube 400, the upper and lower ends of the opposite edges of the first half-cylinder member 400a and the second half-cylinder member 400b are detachably connected by a connecting member 500 to firmly install the first half-cylinder member 400a and the second half-cylinder member 400b together to form the outer insulating tube 400.

[0033] Reference Figures 2 to 4 According to some embodiments of the present invention, the connecting member 500 is connected to the corresponding edge of the first half-cylinder member 400a by bolts, and the connecting member 500 is connected to the corresponding edge of the second half-cylinder member 400b by bolts. In this way, it can ensure that the connection between the first half-cylinder member 400a and the second half-cylinder member 400b is reliable, and the first half-cylinder member 400a and the second half-cylinder member 400b can be detachable.

[0034] It should be noted that the above-mentioned connecting member 500 can also be connected to the first half-cylinder member 400a or the second half-cylinder member 400b in other ways. For example, the connecting member 500 and the first half-cylinder member 400a can be connected together by snap fastening.

[0035] Reference Figure 2 、 Figure 3 and Figure 5 According to some embodiments of the present invention, a connector 500 is provided with a clamping portion 510 at one end, and a first limiting groove 520 is provided within the clamping portion 510. The first limiting groove 520 is arc-shaped. In each outer insulating tube 400, the first half-tube member 400a and the second half-tube member 400b are inserted into the first limiting groove 520. During the process of connecting the first half-tube member 400a and the second half-tube member 400b, the limiting groove can limit the position of the first half-tube member 400a and the second half-tube member 400b, allowing a worker to manually adjust and fix the position of the connector 500, making it easier to align the threaded holes on the connector 500 with the holes for mounting bolts on the first half-tube member 400a and the second half-tube member 400b, thereby facilitating bolt installation. The connector 500, located at the upper end of the outer insulating tube 400, can be hung on the outer insulating tube 400 via the limiting groove, preventing the connector 500 from falling during the process of removing and installing the bolts.

[0036] Reference Figure 4 According to some embodiments of the present invention, the cross-sectional shape of the first half-cylinder 400a and the cross-sectional shape of the second half-cylinder 400b are semicircular arcs, thereby forming a circular outer insulating tube 400, which is beneficial for controlling the volume of the outer insulating tube 400 and has a better appearance.

[0037] Of course, in other embodiments, the first half-cylinder member 400a and the second half-cylinder member 400b may also be configured to have other shapes, such as an elliptical shape.

[0038] Reference Figure 1 and Figure 2 According to some embodiments of the present invention, a first spacer 610 is disposed between the base 100 and each coil 200. The first spacer 610 defines a second limiting groove 611. The lower end of the outer insulating tube 400 is inserted into the second limiting groove 611. The second limiting groove 611 is located on the removable sidewall of the outer insulating tube 400. This arrangement allows the second limiting groove 611 to position and support the lower end of the first half-cylinder 400a and the lower end of the second half-cylinder 400b. To remove the outer insulating tube 400, the sidewall outside the second limiting groove 611 can be removed first. After removing the connector 500, the first and second half-cylinders 400a and 400b can then be easily removed.

[0039] Reference Figure 1 and Figure 3 According to some embodiments of the present invention, a second spacer 620 is disposed between the fixing base 300 and each coil 200. The second spacer 620 is provided with a third limiting groove 621. The upper end of the outer insulating tube 400 is inserted into the third limiting groove 621. The second limiting groove 611 is located on the outer side wall of the outer insulating tube 400 and is removable. With this arrangement, the upper end of the first half-cylinder 400a and the upper end of the second half-cylinder 400b can be positioned by the third limiting groove 621. When the outer insulating tube 400 needs to be removed, the outer side wall of the third limiting groove 621 and the outer side wall of the second limiting groove 611 can be removed first. Then, after removing the connector 500, the first half-cylinder 400a and the second half-cylinder 400b can be easily removed.

[0040] Reference Figure 1 and Figure 2According to some embodiments of the present invention, four first pads 610 are arranged between the base 100 and each coil 200, and the first pads 610 are provided with second limiting grooves 611. In each outer insulating tube 400, the first half-cylinder 400a and the second half-cylinder 400b are elastic, and the front and rear ends of the lower edge of the first half-cylinder 400a and the front and rear ends of the lower edge of the second half-cylinder 400b are inserted into the second limiting grooves 611 of the corresponding four first pads 610 one by one. Through the above arrangement, the lower end of the first half-cylinder 400a and the lower end of the second half-cylinder 400b can be positioned and supported by the second limiting groove 611. When the outer insulating tube 400 needs to be removed, since the first half-cylinder 400a and the second half-cylinder 400b are elastic, the connecting member 500 can be removed first, and then the first half-cylinder 400a and the second half-cylinder 400b can be directly pulled out with a certain amount of effort. When reinstalling the first half-cylinder 400a and the second half-cylinder 400b, the front and rear ends of the lower edges of the first half-cylinder 400a and the second half-cylinder 400b can be inserted into the corresponding second limiting grooves 611.

[0041] Reference Figure 1 and Figure 3 According to some embodiments of the present invention, four second spacers 620 are disposed between the fixing base 300 and each coil 200. The second spacers 620 are provided with third limiting slots 621. In each outer insulating tube 400, the front and rear ends of the upper edge of the first half-cylinder 400a and the front and rear ends of the upper edge of the second half-cylinder 400b are correspondingly inserted into the third limiting slots 621 of the four second spacers 620. This arrangement allows the upper ends of the first half-cylinder 400a and the second half-cylinder 400b to be positioned via the third limiting slots 621. Furthermore, because the first half-cylinder 400a and the second half-cylinder 400b are elastic, the second spacers 620 do not prevent the first half-cylinder 400a and the second half-cylinder 400b from being unable to be assembled or disassembled.

[0042] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0043] The embodiment is described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiment. Various changes can be made within the knowledge of ordinary technicians in the technical field without departing from the present invention.

Claims

1. An offshore wind power dry-type transformer with an easily disassembled outer insulation tube, characterized in that: include: Base (100); At least three coils (200), the lower ends of all the coils (200) are mounted on the base (100), each base (100) is sleeved with an outer insulating tube (400), and the coils (200) are provided with an external boss (210); A fixing seat (300) is located on the upper side of the coil (200), and the fixing seat (300) is fixedly connected to all the coils (200); Wherein, in each of the outer insulating cylinders (400), the outer insulating cylinder (400) comprises a first half-cylinder (400a) and a second half-cylinder (400b), the first half-cylinder (400a) and the second half-cylinder (400b) enclose forming a receiving hole (410) for receiving the corresponding coil (200), and the opposite edges of the first half-cylinder (400a) and the second half-cylinder (400b) are detachably connected via a connecting piece (500). A first avoidance groove (421) is provided on the edge of the first semi-cylinder (400a) relative to the second semi-cylinder (400b), and a second avoidance groove (422) is provided on the edge of the second semi-cylinder (400b) relative to the first semi-cylinder (400a). The first avoidance groove (421) and the second avoidance groove (422) are connected to form an avoidance hole (420), and the external boss (210) is passed through the corresponding avoidance hole (420).

2. The offshore wind power dry-type transformer with an easily disassembled outer insulation tube according to claim 1, characterized in that: In each of the outer insulating cylinders (400), the upper and lower ends of the opposite edges of the first half cylinder (400a) and the second half cylinder (400b) are detachably connected via a connecting piece (500).

3. The offshore wind power dry-type transformer with an easily disassembled outer insulation tube according to claim 2, characterized in that: The connecting member (500) is connected to the corresponding edge of the first half-cylinder member (400a) through bolts, and the connecting member (500) is connected to the corresponding edge of the second half-cylinder member (400b) through bolts.

4. The offshore wind power dry-type transformer with an easily disassembled outer insulation tube according to claim 3 is characterized in that: A clamping portion (510) is provided at one end of the connecting member (500), a first limiting groove (520) is provided in the clamping portion (510), and the first limiting groove (520) is arc-shaped. In each of the outer insulating cylinders (400), the first half-cylinder member (400a) and the second half-cylinder member (400b) are inserted into the first limiting groove (520).

5. The offshore wind power dry-type transformer with an easily disassembled outer insulation tube according to claim 1, characterized in that: The cross-sectional shape of the first semi-cylindrical member (400a) and the cross-sectional shape of the second semi-cylindrical member (400b) are semicircular arc shapes.

6. The offshore wind power dry-type transformer with an easily disassembled outer insulation tube according to claim 1, characterized in that: A first cushion block (610) is provided between the base (100) and each coil (200), the first cushion block (610) being provided with a second limiting groove (611), the lower end of the outer insulating tube (400) being inserted into the second limiting groove (611), and the second limiting groove (611) being located on a detachable side wall outside the outer insulating tube (400).

7. The offshore wind power dry-type transformer with an easily disassembled outer insulation tube according to claim 6, characterized in that: A second spacer (620) is provided between the fixing seat (300) and each of the coils (200), the second spacer (620) is provided with a third limiting groove (621), the upper end of the outer insulating tube (400) is inserted into the third limiting groove (621), and the second limiting groove (611) is located on a detachable side wall outside the outer insulating tube (400).

8. The offshore wind power dry-type transformer with an easily disassembled outer insulation tube according to claim 1, characterized in that: Four first pads (610) are provided between the base (100) and each of the coils (200), and the first pads (610) are provided with second limiting grooves (611), wherein, in each of the outer insulating cylinders (400), the first half-cylinder (400a) and the second half-cylinder (400b) are elastic, and the front and rear ends of the lower edge of the first half-cylinder (400a) and the front and rear ends of the lower edge of the second half-cylinder (400b) are correspondingly inserted into the second limiting grooves (611) of the corresponding four first pads (610).

9. The offshore wind power dry-type transformer with an easily disassembled outer insulation tube according to claim 8, characterized in that: Four second pads (620) are provided between the fixing seat (300) and each of the coils (200), and the second pads (620) are provided with third limiting grooves (621), wherein, in each of the outer insulating cylinders (400), the front and rear ends of the upper edge of the first half-cylinder (400a) and the front and rear ends of the upper edge of the second half-cylinder (400b) are correspondingly inserted into the third limiting grooves (621) of the corresponding four second pads (620).

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