Transformer cooling fan replacement device and method

Abstract

The invention discloses a transformer cooling fan replacement device which comprises a support, a positioning assembly and a matching assembly, the support is provided with a first end and a second end and arranged below a transformer, the support can move relative to the transformer in the direction from the first end to the second end, the support is provided with a fan, and the fan is used for cooling the transformer. The positioning assembly is fixedly arranged below the transformer and comprises a first positioning piece and a second positioning piece, the first positioning piece is adjacent to the first end and is spaced from the first end, the second positioning piece is arranged on one side of the support and is adjacent to the second end, and the matching assembly is arranged on the support and comprises a first matching part and a second matching part; the first matching part is arranged at the first end and matched with the first positioning piece, and the second matching part is arranged at the second end and matched with the second positioning piece. The transformer cooling fan replacement device provided by the embodiment of the invention is high in replacement efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and in particular to a device and method for replacing a transformer cooling fan. Background Art

[0002] As part of the excitation system, the excitation transformer in a hydropower plant provides the DC power required by the generator and plays a vital role in its stable operation. Excitation transformer heating is a complex phenomenon that can be caused by a variety of factors. To effectively control the transformer's operating temperature, a cooling fan must be installed at the bottom of the excitation transformer to ensure stable and efficient operation.

[0003] In related technologies, the cooling fan is fixed to the bottom of the excitation transformer by bolts. When replacing the cooling fan, it is usually necessary to shut down the excitation transformer before replacing it. This not only affects the power supply of the excitation transformer, but may also cause equipment damage and safety risks due to improper operation. Summary of the Invention

[0004] As the domestic hydropower industry begins to systematically implement "benchmarking management," the operating indicators of benchmark units not only reflect technical capabilities, but also the increasing demand for reducing downtime and improving equipment reliability. This has driven the development and application of online replacement technology for excitation transformer cooling fans. To this end, embodiments of the present invention provide a transformer cooling fan replacement device.

[0005] The transformer cooling fan replacement device according to an embodiment of the present invention includes:

[0006] a bracket having a first end and a second end and being disposed below the transformer, the bracket being movable relative to the transformer in a direction from the first end to the second end, the bracket being provided with a fan for cooling the transformer;

[0007] a positioning assembly fixedly disposed below the transformer, the positioning assembly comprising a first positioning member and a second positioning member, the first positioning member being adjacent to and spaced from the first end, the second positioning member being disposed on one side of the bracket and adjacent to the second end;

[0008] A mating component is provided on the bracket, and the mating component includes a first mating portion and a second mating portion, the first mating portion is provided at the first end and mated with the first positioning member, the second mating portion is provided at the second end, and the second mating portion mated with the second positioning member.

[0009] The transformer cooling fan replacement device of the embodiment of the present invention can replace or repair the fan by directly pulling out the bracket from under the transformer when the fan is damaged and needs to be replaced or repaired. Compared with the prior art, the transformer is first powered off and then the fan is replaced. This reduces the impact of the transformer power outage and improves the reliability of equipment operation. Moreover, when the bracket is installed under the transformer, it is positioned by the matching assembly and the positioning assembly to ensure that the bracket and the fan are firmly installed under the transformer. The positioning assembly and the matching assembly have a simple structure and a simple matching method, which saves costs.

[0010] In some embodiments, there are two first positioning members, which are spaced apart along a first direction, the first direction being orthogonal to the extension direction of the bracket, and there are two first matching portions, which are spaced apart along the first direction at the first end, and the two first matching portions correspond one-to-one to the two first positioning members.

[0011] In some embodiments, there are two second positioning members, and the two second positioning members are respectively arranged on both sides of the bracket along the first direction. There are two second matching parts, and the two second matching parts are arranged at intervals at the second end along the first direction. The two second matching parts correspond one-to-one to the two second positioning members.

[0012] In some embodiments, the first positioning member includes a fixing frame and a positioning block, the fixing frame is fixed under the transformer, one end of the positioning block is provided on the fixing frame, the other end of the positioning block extends toward the first end and has a positioning hole, the inner circumference of the positioning hole is frustum-shaped, the cross-sectional area of ​​the positioning hole adjacent to the end of the bracket is larger than the cross-sectional area of ​​the positioning hole adjacent to the end of the fixing frame, and at least a portion of the first mating portion is mated in the positioning hole.

[0013] In some embodiments, at least a portion of the outer circumference of the first matching portion is in a frustum shape, and at least a portion of the first matching portion is adapted to the positioning hole.

[0014] In some embodiments, the transformer cooling fan replacement device further comprises:

[0015] Tracks, wherein there are two tracks, the two tracks are arranged below the bracket at intervals along a first direction and extend along an extension direction of the bracket, and the first direction is orthogonal to the extension direction of the bracket;

[0016] Wheels, there are multiple wheels, the multiple wheels are divided into two groups, the two groups of wheels are arranged at intervals along the first direction and are provided on the bottom surface of the bracket, each group of wheels includes at least two wheels, at least two wheels in each group are arranged at intervals along the extension direction of the bracket, and the wheels are provided in the track and are movable relative to the track.

[0017] In some embodiments, the transformer cooling fan replacement device also includes two fixing parts, which are detachably arranged on the ground and adjacent to the second end. The fixing parts are arranged corresponding to the second positioning parts, and the fixing parts are used to fix the bracket.

[0018] In some embodiments, a fastening bolt is provided on the fixing member, and the fastening bolt can be pressed against the second end of the bracket.

[0019] In some embodiments, the transformer cooling fan replacement device further includes a protective cover, which is fixed to the second end of the bracket.

[0020] The transformer cooling fan replacement method according to an embodiment of the present invention includes:

[0021] S1. Remove the fixings from the ground;

[0022] S2. Pull the second end of the bracket inside the protective cover to pull the bracket and the fan out from under the transformer;

[0023] S3. Replace the damaged fan;

[0024] S4. Push the second end of the protective cover to push the bracket and the replaced fan to the bottom of the transformer, and check whether the matching assembly and the positioning assembly are matched;

[0025] S5. Install the fixing parts to tighten the bracket.

[0026] The transformer cooling fan replacement method according to the embodiment of the present invention is simple in replacement manner and high in fan replacement efficiency, thereby reducing the impact of power outages on the transformer and improving the reliability of equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a side view of a transformer cooling fan replacement device according to an embodiment of the present invention.

[0028] Figure 2 It is a front view of the transformer cooling fan replacement device according to an embodiment of the present invention.

[0029] Figure markings: 1. bracket; 11. first end; 12. second end; 2. positioning assembly; 21. first positioning member; 211. fixing frame; 212. positioning block; 213. reinforcing rib; 22. second positioning member; 3. mating assembly; 31. first mating portion; 32. second mating portion; 4. fan; 51. track; 52. wheel; 6. fixing member; 61. fastening bolt; 62. reinforcing rib; 7. protective cover. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0031] like Figure 1 and Figure 2 As shown, the transformer cooling fan replacement device of the embodiment of the present invention includes a bracket 1, a positioning assembly 2 and a matching assembly 3. The bracket 1 has a first end 11 and a second end 12 and is arranged below the transformer. The bracket 1 can move from the first end 11 to the second end 12 relative to the transformer. The bracket 1 is provided with a fan 4, which is used to cool the transformer. The positioning assembly 2 is fixed below the transformer. The positioning assembly 2 includes a first positioning member 21 and a second positioning member 22. The first positioning member 21 is adjacent to the first end 11 and is spaced apart from the first end 11. The second positioning member 22 is provided on one side of the bracket 1 and adjacent to the second end 12. The matching assembly 3 is provided on the bracket 1. The matching assembly 3 includes a first matching portion 31 and a second matching portion 32. The first matching portion 31 is provided at the first end 11 and matches with the first positioning member 21. The second matching portion 32 is provided at the second end 12 and matches with the second positioning member 22.

[0032] The transformer cooling fan replacement device of the embodiment of the present invention, when the fan 4 is damaged and needs to be replaced or repaired, the bracket 1 is directly pulled out from under the transformer to replace or repair the fan 4. Compared with the prior art, the transformer is first powered off and then the fan 4 is replaced, which reduces the impact of the transformer power outage and improves the reliability of equipment operation. Moreover, when the bracket 1 is installed under the transformer, it is positioned by the matching component 3 and the positioning component 2 to ensure that the bracket 1 and the fan 4 are firmly installed under the transformer. The positioning component 2 and the matching component 3 have a simple structure and a simple matching method, which saves costs.

[0033] Specifically, there is a bracket 1 on each symmetrical side under each transformer, and there are at least four fans 4. Every two fans form a group of four. The two fans 4 in each group are arranged at intervals along the extension direction of the bracket 1. When the fans 4 are replaced, at least one group of fans 4 can be guaranteed to operate normally to cool the transformer.

[0034] Specifically, the first positioning member 21 is arranged adjacent to the first end 11 and can cooperate with the first matching portion 31 provided at the first end 11 to limit the bracket 1. The second positioning member 22 is provided on one side of the bracket 1 and can limit the bracket 1 in the first direction to ensure that the fan 4 does not vibrate during operation and ensure the cooling efficiency of the fan 4 on the transformer.

[0035] In some embodiments, there are two first positioning members 21, and the two first positioning members 21 are arranged at intervals along the first direction, and the first direction is orthogonal to the extension direction of the bracket 1. There are two first matching parts 31, and the two first matching parts 31 are arranged at intervals along the first direction at the first end 11. The two first matching parts 31 correspond one-to-one with the two first positioning members 21, so that the bracket 1 is installed firmly under the transformer and is not easily moved by external forces, thereby ensuring the cooling effect of the fan 4 on the transformer.

[0036] In some embodiments, there are two second positioning members 22, and the two second positioning members 22 are respectively arranged on both sides of the bracket 1 along the first direction. There are two second matching parts 32, and the two second matching parts 32 are arranged at intervals along the first direction at the second end 12. The two second matching parts 32 correspond one-to-one to the two second positioning members 22.

[0037] Specifically, when the bracket 1 moves under the transformer, the two positioning parts can limit the bracket 1 to ensure that the bracket 1 is not easily offset during the movement, thereby improving the installation efficiency and safety of the bracket 1 under the transformer, and further ensuring the stability of the bracket 1 moving under the transformer.

[0038] In some embodiments, the first positioning member 21 includes a fixing frame 211 and a positioning block 212. The fixing frame 211 is fixed under the transformer. One end of the positioning block 212 is provided on the fixing frame 211. The other end of the positioning block 212 extends toward the first end 11 and has a positioning hole (not shown). The inner circumference of the positioning hole is frustum-shaped. The cross-sectional area of ​​the end of the positioning hole adjacent to the bracket 1 is larger than the cross-sectional area of ​​the end of the positioning hole adjacent to the fixing frame 211. At least a portion of the first matching portion 31 is fitted in the positioning hole.

[0039] Specifically, the fixing bracket 211 is fixedly mounted on the ground. Support ribs 213 are provided on the side of the fixing bracket 211 facing away from the bracket 1 to enhance its structural strength and ensure its secure installation. When the bracket 1 is moved, at least a portion of the first engaging portion 31 engages with the positioning hole, which guides the bracket 1 and ensures efficient installation. The first positioning member 21 has a simple structure, reducing manufacturing costs.

[0040] It is understandable that the structure of the second positioning member 22 is the same as that of the first positioning member 21 , and the structure of the second positioning member 22 is not described in detail here.

[0041] In some embodiments, at least a portion of the outer circumference of the first matching portion 31 is in a frustum shape, and at least a portion of the first matching portion 31 is adapted to the positioning hole.

[0042] Specifically, the outer peripheral surface of one end of the first matching portion 31 adjacent to the positioning block 212 is frustum-shaped and fits into the positioning hole. The positioning hole can guide and fix the first matching portion 31, thereby ensuring the efficiency of the installation of the bracket 1 under the transformer, and further ensuring the cooling effect of the fan 4 on the bracket 1 on the transformer.

[0043] It is understandable that the structure of the second matching portion 32 is the same as that of the first matching portion 31 , and the structure of the second matching portion 32 is not described in detail here.

[0044] In some embodiments, the transformer cooling fan replacement device further includes rails 51 and wheels 52. Two rails 51 are provided, spaced apart along a first direction below the bracket 1 and extending along the extension direction of the bracket 1. The first direction is orthogonal to the extension direction of the bracket 1. Multiple wheels 52 are provided, divided into two groups. The two groups of wheels 52 are spaced apart along the first direction and disposed on the bottom surface of the bracket 1. Each group of wheels 52 includes at least two wheels 52. The at least two wheels 52 in each group are spaced apart along the extension direction of the bracket 1. The wheels 52 are disposed within the rails 51 and are movable relative to the rails 51.

[0045] Specifically, the bracket 1 moves within the track 51 via the wheels 52 , thereby increasing the moving speed of the bracket 1 and ensuring the replacement efficiency of the fan 4 .

[0046] In some embodiments, the transformer cooling fan replacement device further includes two fixing members 6, which are detachably mounted on the ground adjacent to the second end 12. The fixing members 6 are disposed correspondingly to the second positioning members 22 and are used to secure the bracket 1. The fixing members 6 are provided with fastening bolts 61, which can be tightened against the second end 12 of the bracket 1.

[0047] Specifically, one end of the fixing member 6 is detachably mounted to the ground via a bolt. The other end of the fixing member 6 is provided with a fastening bolt 61. Fastening bolt 61 can be tightly abutted against second end 12 of bracket 1, ensuring a tight fit between first mating portion 31 and first positioning member 21, and between second mating portion 32 and second positioning member 22. This ensures that bracket 1 is securely mounted and that fan 4 does not vibrate during operation. Fastening bolt 61 is preferably an M16 x 80 mm bolt.

[0048] Specifically, there are two fasteners 6 , which are spaced apart along the first direction, and the two rails 51 are located between the two fasteners 6 .

[0049] In some embodiments, the transformer cooling fan replacement device also includes a protective cover 7, which is fixed to the second end 12 of the bracket 1. The staff can put their hands into the protective cover 7 to operate, so as to achieve safe disassembly and assembly of the fixing part 6 and the plugging and unplugging of the fan power aviation plug. The protective cover 7 plays a role of safety isolation.

[0050] Specifically, the protective cover 7 is larger than the bracket 1 in the first direction and is roughly flush with the top surface of the fan 4 in the height direction. The protective cover 7 is made of acrylic sheet, which saves costs. The fixing member 6 and the fan power supply aviation plug are located within the protective cover 7. When removing and installing the fixing member 6, plugging and unplugging the fan power supply aviation plug, and moving the bracket 1, personnel can operate within the protective cover 7 for safety protection.

[0051] The transformer cooling fan replacement method according to an embodiment of the present invention includes:

[0052] S1. Remove the fixing member 6 from the ground.

[0053] Specifically, a protective cover (not shown) is provided outside the transformer to protect the transformer, and a movable door (not shown) is provided at the bottom end of the protective cover. The bracket 1 can be moved to the outside of the protective cover through the movable door to facilitate the replacement of the fan 4.

[0054] When replacing the fan 4, first unplug the power supply aviation plug of the fan 4 in the protective cover through the movable door, completely loosen the fastening bolt 61 from the fixing part 6, and then remove the fixing part 6 to make the bracket 1 movable.

[0055] S2. Pull the second end 12 of the bracket 1 through the inside of the protective cover 7 to pull the bracket 1 and the fan 4 out from under the transformer. Specifically, pull the bracket 1 from the movable door to the outside of the excitation transformer cover so that the fan 4 can be replaced.

[0056] S3. Replace the damaged fan 4.

[0057] S4. Push the second end 12 to move the bracket 1 and the replaced fan 4 under the transformer and check whether the mating assembly 3 is mated with the positioning assembly 2. Specifically, after replacing the fan 4, move the bracket 1 through the movable door to under the transformer. During the pushing process, ensure that the first mating portion 31 is mated with the first positioning member 21 and the second mating portion 32 is mated with the second positioning member 22.

[0058] S5. Install the fixing member 6 to fix the bracket 1.

[0059] Specifically, the fixing member 6 is installed on the ground by means of bolts, and the second end 12 of the bracket 1 is pressed tightly by means of the fixing bolts 61 to ensure that the bracket 1 is firmly installed.

[0060] S6. Plug in the power plug of the fan 4 and close the movable door.

[0061] The transformer cooling fan replacement method of the embodiment of the present invention is simple in replacement mode and high in replacement efficiency of the fan 4 , thereby reducing the impact of power outages on the transformer and improving the reliability of equipment operation.

[0062] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0063] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0064] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0065] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0066] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0067] Although the above embodiments have been shown and described, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those skilled in the art are all within the scope of protection of the present invention.

Claims

1. A transformer cooling fan replacement device, characterized in that: include: A bracket (1), the bracket (1) having a first end (11) and a second end (12) and being arranged below a transformer, the bracket (1) being movable relative to the transformer in a direction from the first end (11) to the second end (12), the bracket (1) being provided with a fan (4), the fan (4) being used to cool the transformer; A positioning assembly (2), the positioning assembly (2) being fixedly arranged below the transformer, the positioning assembly (2) comprising a first positioning member (21) and a second positioning member (22), the first positioning member (21) being adjacent to the first end (11) and spaced apart from the first end (11), and the second positioning member (22) being arranged on one side of the bracket (1) and adjacent to the second end (12); A mating component (3), the mating component (3) being arranged on the bracket (1), the mating component (3) comprising a first mating portion (31) and a second mating portion (32), the first mating portion (31) being arranged at the first end (11) and mating with the first positioning member (21), the second mating portion (32) being arranged at the second end (12), and mating with the second positioning member (22).

2. The transformer cooling fan replacement device according to claim 1, characterized in that: There are two first positioning members (21), and the two first positioning members (21) are arranged at intervals along a first direction, and the first direction is orthogonal to the extension direction of the bracket (1); there are two first matching parts (31), and the two first matching parts (31) are arranged at intervals along the first direction at the first end (11), and the two first matching parts (31) correspond one-to-one to the two first positioning members (21).

3. The transformer cooling fan replacement device according to claim 2, characterized in that: There are two second positioning members (22), and the two second positioning members (22) are respectively arranged on both sides of the bracket (1) along the first direction; there are two second matching parts (32), and the two second matching parts (32) are arranged at the second end (12) at intervals along the first direction; the two second matching parts (32) correspond one-to-one to the two second positioning members (22).

4. The transformer cooling fan replacement device according to claim 1, characterized in that: The first positioning member (21) comprises a fixing frame (211) and a positioning block (212); the fixing frame (211) is fixedly arranged below the transformer; one end of the positioning block (212) is arranged on the fixing frame (211); the other end of the positioning block (212) extends toward the first end (11) and has a positioning hole; the inner circumference of the positioning hole is truncated cone-shaped; the cross-sectional area of ​​the end of the positioning hole adjacent to the bracket (1) is larger than the cross-sectional area of ​​the end of the positioning hole adjacent to the fixing frame (211); and at least a portion of the first matching portion (31) is matched in the positioning hole.

5. The transformer cooling fan replacement device according to claim 4, characterized in that: At least a portion of the outer peripheral surface of the first matching portion (31) is in a truncated cone shape, and at least a portion of the first matching portion (31) is adapted to the positioning hole.

6. The transformer cooling fan replacement device according to claim 1, characterized in that: Also includes: Tracks (51), there are two tracks (51), the two tracks (51) are arranged below the bracket (1) at intervals along a first direction and extend along the extension direction of the bracket (1), the first direction being orthogonal to the extension direction of the bracket (1); Wheels (52), wherein the wheels (52) are multiple, and the multiple wheels (52) are divided into two groups, the two groups of wheels (52) are arranged at intervals along the first direction and are provided on the bottom surface of the bracket (1), each group of wheels (52) includes at least two wheels (52), and at least two wheels (52) in each group are arranged at intervals along the extension direction of the bracket (1), and the wheels (52) are provided in the track (51) and are movable relative to the track (51).

7. The transformer cooling fan replacement device according to claim 6, characterized in that: It also includes two fixing members (6), which are detachably arranged on the ground and adjacent to the second end (12). The fixing members (6) are arranged corresponding to the second positioning member (22), and the fixing members (6) are used to fix the bracket (1).

8. The transformer cooling fan replacement device according to claim 7, characterized in that: The fixing member (6) is provided with a fastening bolt (61), and the fastening bolt (61) can be pressed against the second end (12) of the bracket (1).

9. The transformer cooling fan replacement device according to claim 1, characterized in that: It also includes a protective cover (7), which is fixed to the second end (12) of the bracket (1).

10. A method for replacing a transformer cooling fan, characterized in that: include: S1. Remove the fixing member (6) from the ground; S2. Pull the second end (12) of the bracket (1) inside the protective cover (7) to pull the bracket (1) together with the fan (4) out from under the transformer; S3, replace the damaged fan (4); S4. Push the second end (12) inside the protective cover (7) to push the bracket (1) and the replaced fan (4) to the bottom of the transformer, and check whether the matching component (3) and the positioning component (2) are matched; S5. Install the fixing member (6) to fasten the bracket (1).

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