A lightweight corrugated metal oil conservator shell structure for transformers.

Abstract

This utility model belongs to the technical field of corrugated metal oil conservator, specifically a lightweight corrugated metal oil conservator shell structure for transformers with internal oil. The movable top cover is bolted to the upper ends of enclosure A and enclosure B, respectively, and the lower ends of enclosure A and enclosure B are bolted to the cabinet base surface. This utility model simplifies the shell structure of the corrugated metal oil conservator, reduces manufacturing costs, and improves production efficiency. Compared with traditional corrugated metal oil conservator shell structures, the lightweight corrugated metal oil conservator shell structure of this utility model has advantages such as simplified structure, reduced weight, reduced costs, increased production efficiency, and improved product consistency and interchangeability.

Description

Technical Field

[0001] This utility model belongs to the technical field of metal corrugated oil tanks, specifically a lightweight metal corrugated oil tank shell structure for transformers with internal oil. Background Technology

[0002] Traditional transformers use internal oil-filled corrugated metal conservators, which are structurally divided into two main parts: the expansion core and the outer shell. For example... Figure 1 As shown, the outer casing structure generally consists of two parts: the cabinet cover 9 and the cabinet base 3. The cabinet cover 9 serves to protect the expansion core and is welded from metal plates and profiles for reinforcement. A window structure 10 for maintenance and heat dissipation is provided on the cabinet cover 9. The cabinet base 3 serves to support the expansion core and the cabinet cover 9 and connect to the transformer. The cabinet base 3 is typically welded from profiles, with a base plate and other structures, and is connected to the various parts using bolts.

[0003] The traditional internal oil-bearing corrugated metal tank has a complex outer shell structure designed to ensure load-bearing and protective functions, which to some extent limits the development of the metal corrugated oil tank industry. Its main drawbacks are as follows:

[0004] First, because the outer shell structure of traditional internal oil-filled corrugated metal tanks primarily employs welding for the base and cover, the selection of raw materials must consider their weldability, and the manufacturing process must limit welding deformation. Therefore, thicker plates and profiles are required to reduce welding deformation, often resulting in structural mechanical properties exceeding protective requirements. Furthermore, numerous connecting structures are needed to link the welded parts and reinforce the welds. Consequently, the outer shell structure of traditional internal oil-filled corrugated metal tanks is quite heavy, leading to high manufacturing costs.

[0005] Secondly, the outer shell structure of the traditional internal oil corrugated metal oil tank consists of a base and a cover. The internal expansion core auxiliary functional components need to be assembled and debugged before the cover is installed. Therefore, it requires more independent structures, which are difficult to integrate. It also requires the design of independent maintenance windows on the cover for daily maintenance. This independent structure also increases the product's weight and manufacturing cost.

[0006] Third, because the outer shell structure of traditional internal oil corrugated metal tanks mainly uses welding technology, the main outer shell components can only be painted after welding is completed. These components are often large in size, making it difficult to apply automated equipment and efficient pre-treatment processes. Therefore, there are often many painting defects and the painting cost is high.

[0007] Fourth, because the outer shell structure of traditional internal oil-filled corrugated metal tanks mainly uses welding technology, dimensional control is difficult, and welded products often have large errors. This results in poor consistency of the outer shell structure of the same model, making them difficult to use interchangeably and limiting the modular design of the outer shell structure of metal corrugated metal tanks. Furthermore, when a part of the outer shell structure of a traditional internal oil-filled corrugated metal tank is damaged, the entire structure often needs to be replaced, resulting in high maintenance costs.

[0008] Fifth, due to the market characteristics of corrugated metal oil tanks, their heights and connection dimensions vary, and they are usually custom-made. Traditional internal oil-sealing corrugated metal oil tanks, due to their integral welded outer shell structure, cannot be pre-stocked, resulting in a long production cycle. Therefore, a more rational outer shell structure for internal oil-sealing corrugated metal oil tanks has become a demand for oil tank manufacturers and can drive the development of the oil tank industry. Utility Model Content

[0009] In view of the above-mentioned problems with the shell structure of traditional internal oil-type corrugated metal oil conservator, the purpose of this utility model is to provide a lightweight internal oil-type corrugated metal oil conservator shell structure for transformers.

[0010] The objective of this utility model is achieved through the following technical solution:

[0011] This utility model includes a cabinet cover and a cabinet base. The cabinet cover has an observation window. The cabinet cover is a split structure, including a movable top cover manufactured using a cold-working process, cover body A, and cover body B. The cabinet base includes a cabinet base surface and cabinet legs manufactured using a cold-working process, with the cabinet legs connected to the cabinet base surface by bolts. The movable top cover is bolted to the upper ends of cover body A and cover body B, respectively, and the lower ends of cover body A and cover body B are bolted to the cabinet base surface, respectively. The movable top cover is divided into a main top cover A and a main top cover B, with two sections in the width direction of the main top cover A and main top cover B... Each side has multiple top cover side panels; the middle of the cover A is the main panel A, and each side of the main panel A has multiple cover rotating plates in the height direction; the middle of the cover B is the main panel B, and each side of the main panel B has multiple cover rotating plates in the height direction; the upper and lower ends of the main panel A are respectively connected to the main top cover A and the cabinet base surface by bolts; the upper and lower ends of the main panel B are respectively connected to the main top cover B and the cabinet base surface by bolts; the upper and lower ends of the cover rotating plates on one side of the main panel A and the main panel B are respectively connected to the top cover side panel and the cabinet base surface on the same side by bolts.

[0012] Wherein: the outer edges of the main board A, the main board B and each side plate of the top cover are all turned downwards, and bolt holes are provided on the turned edges.

[0013] Bolt holes are provided at both the top and bottom ends of the main panel A, main panel B, and each cover plate.

[0014] The edge of the cabinet base is turned down, and bolt holes are provided on the turned-down edge and the surface of the cabinet base.

[0015] Both the main top cover A and main top cover B are rectangular. Each side of the main top cover A and main top cover B in the width direction has three triangular top cover side plates, namely, top cover side plate A, top cover side plate B, and top cover side plate C, which are sequentially adjacent. One vertex of the three top cover side plates converges in the middle of the main top cover A and main top cover B. The outer edges of the three top cover side plates are all turned downwards. Both the main panel A and main panel B are rectangular. Each side of the main panel A in the height direction has two square cover rotating plates, namely, cover rotating plate A adjacent to the main panel A and cover rotating plate B adjacent to cover rotating plate A. The main panel B is high... Two square cover plates are provided on each side of the 10-degree direction, namely cover plate C adjacent to the main panel B and cover plate D adjacent to cover plate C; the edges of cover plate B and cover plate D in the height direction are both turned inward, and bolt holes are opened on the turned edges. The turned edges on cover plate B are connected to the turned edges on cover plate D by bolts; the upper end of cover plate A is connected to the top cover side plate A by bolts; cover plate B and cover plate D are connected by bolts, and the upper end is then connected to the top cover side plate B by bolts; the upper end of cover plate C is connected to the top cover side plate C by bolts.

[0016] The outer surfaces of both main panels A and B are machined with grooves to the inward side, thereby forming protrusions protruding from the inner surfaces of main panels A and B. The protrusions are used to make rolling contact with the rollers set on the top edge of the expansion core installed inside the cabinet.

[0017] The height direction of the groove and the boss is the same as the height direction of the main panel A and the main panel B.

[0018] At least one observation window is provided on the main panel A, main panel B, and each cover plate.

[0019] The advantages and positive effects of this utility model are as follows:

[0020] This utility model employs a cold-working process, primarily involving bending, to manufacture the outer shell structure of a corrugated metal oil storage tank. This makes the outer shell structure easier to produce, reduces manufacturing costs, shortens the manufacturing cycle, and promotes industry development. Specifically:

[0021] 1. Lightweight: This utility model adopts a split structure, which is formed by bolt connection to form the outer shell structure of the metal corrugated oil tank; the parts are manufactured by cold working process with bending as the main method. There is no heat input during the processing of the parts, so they are not easy to deform. There is no need to use materials with a thickness exceeding the actual requirements in order to reduce deformation; and high-strength materials with poor weldability are selected to further reduce the material thickness and significantly reduce the amount of material used.

[0022] 2. Integration: Due to its modular structure, the cabinet cover is divided into several parts, which can be installed in stages and disassembled individually. The support structure of the internal functional components of the oil storage tank can be integrated into the cabinet cover parts, eliminating the need for maintenance windows and other structures, further reducing material usage and manufacturing costs.

[0023] 3. Optimized coating process: The outer shell structure of the metal corrugated oil tank of this utility model is connected by bolts and other means. The external dimensions of each part are much smaller than those of the traditional integral structure. During the coating process, the smaller part size allows for flexible application of coating processes such as pickling and phosphating, electrophoretic primer, and powder coating. Furthermore, the application of automated production lines greatly improves coating efficiency and quality, and reduces coating costs.

[0024] 4. High Consistency: This utility model adopts a cold working process mainly based on bending, resulting in high processing precision. Products of the same model exhibit high consistency and strong interchangeability, facilitating the modular design of the metal corrugated oil tank shell structure. When part of the shell structure of this utility model is damaged, only the damaged part can be replaced, significantly reducing maintenance costs.

[0025] 5. Production mode optimization: The outer shell structure of the metal corrugated oil storage tank of this utility model adopts a split structure. According to the market characteristics of different heights and connection dimensions of metal corrugated oil storage tanks, the overall structure can be divided into customized and non-customized parts. The non-customized parts can be stocked in batches, while the customized parts can be produced on a temporary basis according to actual needs, which can greatly shorten the production cycle. Attached Figure Description

[0026] Figure 1 A schematic diagram of the outer shell structure of a traditional welded internal oil-bearing corrugated metal oil tanker;

[0027] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0028] Figure 3 This is an exploded view of the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of the cabinet base of this utility model;

[0030] Wherein: 1 is the movable top cover, 101 is the top cover main board A, 102 is the top cover main board B, 103 is the top cover side panel A, 104 is the top cover side panel B, 105 is the top cover side panel C, 2 is the cover body A, 201 is the main panel A, 202 is the cover body rotating plate A, 203 is the cover body rotating plate B, 204 is the main panel B, 205 is the cover body rotating plate C, 206 is the cover body rotating plate D, 207 is the groove, 208 is the boss, 3 is the cabinet base, 4 is the cover body B, 5 is the expansion core, 6 is the cabinet base surface, 7 is the cabinet foot, 8 is the observation window, 9 is the cabinet cover, and 10 is the window structure. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings.

[0032] like Figures 2-4 As shown, this utility model includes a cabinet cover and a cabinet base 3, with an observation window 8 on the cabinet cover. The cabinet cover in this embodiment is a split structure, including a movable top cover 1, a cover body A2, and a cover body B4 manufactured using cold working processes (bending or stamping). The cabinet base 3 includes a cabinet base surface 6 and cabinet legs 7 manufactured using cold working processes (bending or stamping). The cabinet legs 7 are bolted to the cabinet base surface 6. In this embodiment, the movable top cover 1, cover body A2, cover body B4, and cabinet base surface 6 are all made of high-strength alloy steel (alloy steel with a yield strength of 345 MPa or higher), and are processed into the designed shape using cold working processes such as bending or stamping. This design offers advantages such as high strength, low weight, and high consistency. Furthermore, it eliminates the need to consider welding deformation and use thicker materials, thus reducing the overall weight and weight of the components. Figure 1 The traditional welded shell structure shown reduces its weight by more than 30%. Based on the stress characteristics, each component is designed with an irregular shape to improve the local mechanical properties of the parts, achieving a low-weight, high-strength effect.

[0033] In this embodiment, the movable top cover 1 is bolted to the upper ends of the cover body A2 and the cover body B4, respectively, and the lower ends of the cover body A2 and the cover body B4 are bolted to the cabinet base surface 6, respectively. The movable top cover 1 is divided into a top cover main board A101 and a top cover main board B102, and each of the top cover main board A101 and the top cover main board B102 has multiple top cover side plates on both sides in the width direction. The middle of the cover body A2 is the main panel A201, and each of the main panel A201 has multiple cover rotating plates on both sides in the height direction. The main panel B204 is located in the middle of body B4. There are multiple cover rotating plates on both sides of the main panel B204 in the height direction. The upper and lower ends of the main panel A201 are connected to the main board A101 of the top cover and the cabinet base surface 6 by bolts. The upper and lower ends of the main panel B204 are connected to the main board B102 of the top cover and the cabinet base surface 6 by bolts. The upper and lower ends of the cover rotating plates on one side of the main panel A201 and the main panel B204 are connected to the side plate of the top cover and the cabinet base surface 6 on the same side by bolts.

[0034] In this embodiment, both the top cover main board A101 and the top cover main board B102 are rectangular with the same size, and their inner long sides are adjacent. Each side of the width direction of the top cover main board A101 and the top cover main board B102 is provided with three triangular top cover side plates, namely the top cover side plate A103, the top cover side plate B104 and the top cover side plate C105, which are adjacent in sequence. One vertex of the three top cover side plates converges at the middle of the width direction of the top cover main board A101 and the top cover main board B102. The outer long sides of the top cover main board A101 and the top cover main board B102 and the outer edges of the three top cover side plates are all turned down, and bolt holes are opened on the turned edges.

[0035] In this embodiment, both the main panel A201 and the main panel B204 are rectangular. Each side of the main panel A201 along its height direction has two square cover plates: cover plate A202 adjacent to the main panel A201 and cover plate B203 adjacent to cover plate A202. Cover plate B203 is perpendicular to the main panel A201. Each side of the main panel B204 along its height direction has two square cover plates: cover plate C205 adjacent to the main panel B204 and cover plate D206 adjacent to cover plate C205. Cover plate D206 is perpendicular to the main panel B204. The edges of cover plate B203 and cover plate D206 along their height direction are both turned inwards, and bolt holes are provided on these turned edges. The turned edges on cover plate B203 are connected to the turned edges on cover plate D206 via bolts. Bolt holes are provided at both the top and bottom ends of the main panel A201, main panel B204, and each cover rotating plate. The upper end of the main panel A201 is connected to the flange on the main board A101 of the top cover by bolts. The upper end of the cover rotating plate A202 is connected to the flange on the side plate A103 of the top cover by bolts. The flange on the cover rotating plate B203 is connected to the flange on the cover rotating plate D206 by bolts, and then the upper end is connected to the flange on the side plate B104 of the top cover by bolts. The upper end of the cover rotating plate C205 is connected to the flange on the side plate C105 of the top cover by bolts.

[0036] In this embodiment, the edge of the cabinet base surface 6 is turned down, and bolt holes are provided on the turned-up edge and the surface of the cabinet base surface 6. The lower ends of the main panel A201, the main panel B204, and each cover plate are located outside the turned-up edge on the cabinet base surface 6, and are respectively connected to the turned-up edge on the cabinet base surface 6 by bolts.

[0037] In this embodiment, the outer surfaces of both the main panel A201 and the main panel B204 are machined with two grooves 207 on the inward side, thereby forming bosses 208 protruding from the inner surfaces of the main panel A201 and the main panel B204. The height direction of the grooves 207 and the bosses 208 is the same as the height direction of the main panel A201 and the main panel B204. The bosses 208 are used to roll in contact with the rollers 501 set on the top edge of the expansion core 5 installed inside the cabinet.

[0038] At least one observation window 8 is provided on the main panel A201, the main panel B204 and each cover plate. In this embodiment, an observation window 8 is provided on the main panel A201, and the observation window 8 is located in the middle of the two grooves 207 on the main panel A201.

[0039] In this embodiment, the movable top cover 1, the cover A2, the cabinet base 3, and the cover B4 are all painted before assembly, and their three-dimensional dimensions during painting are much smaller than those shown below. Figure 1 The traditional welded shell structure shown is more suitable for space-constrained processes such as pickling, phosphating, and electrophoretic primer coating; and because it is an open structure, compared to... Figure 1 The traditional welded shell structure shown has no enclosed space and is more suitable for automated painting or electrostatic spraying processes.

[0040] In this embodiment, the movable top cover 1, cover A2, cabinet base 3, and cover B4 are all designed with bolt holes for bolt connections, allowing for step-by-step installation. This enables the installation and debugging of the expansion core 5 to be carried out even before the outer shell structure is fully assembled. Therefore, cover A2 and cover B4 in the outer shell structure are designed with numerous additional installation structures besides the necessary connection structures for installing other hydraulic and electrical auxiliary structures of the expansion core 5. When the product requires maintenance, the movable top cover 1 can be removed for repair.

[0041] In this embodiment, the movable top cover 1, cover A2, cabinet base 3, and cover B4 are all detachable. Because the movable top cover 1, cover A2, cabinet base 3, and cover B4 are all manufactured using high-precision cold-working processes such as bending or stamping, they exhibit extremely high consistency. Therefore, when a portion of the outer shell structure is damaged, only the damaged part can be removed and replaced, unlike traditional oil tank outer shell structures that require complete replacement, significantly reducing maintenance costs. Furthermore, the installation positions of cover A2 and cover B4 are interchangeable; the observation window 8 can be located on the front of cover A2 and / or cover B4, or on the four corner rotating plates of the cover.

Claims

1. A lightweight corrugated metal oil conservator shell structure for transformers, comprising a cover and a base, wherein the cover is provided with an observation window; characterized in that: The cabinet cover is a split structure, including a movable top cover (1), cover body A (2) and cover body B (4) manufactured using a cold working process. The cabinet base (3) includes a cabinet base surface (6) and cabinet legs (7) manufactured using a cold working process. The cabinet legs (7) are connected to the cabinet base surface (6) by bolts. The movable top cover (1) is connected to the upper ends of cover body A (2) and cover body B (4) by bolts. The lower ends of cover body A (2) and cover body B (4) are connected to the cabinet base surface (6) by bolts. The movable top cover (1) is divided into a top cover main board A (101) and a top cover main board B (102). The top cover main board A (101) and the top cover main board B (102) each have multiple top cover side plates on both sides in the width direction. The middle part of the cover A (2) is the main panel A (201), and there are multiple cover rotating plates on both sides of the main panel A (201) in the height direction. The middle part of the cover B (4) is the main panel B (204), and there are multiple cover rotating plates on both sides of the main panel B (204) in the height direction. The upper and lower ends of the main panel A (201) are respectively connected to the main board A (101) of the top cover and the cabinet base surface (6) by bolts. The upper and lower ends of the main panel B (204) are respectively connected to the main board B (102) of the top cover and the cabinet base surface (6) by bolts. The upper and lower ends of the cover rotating plates on one side of the main panel A (201) and the main panel B (204) are respectively connected to the top cover side plate and the cabinet base surface (6) on the same side by bolts.

2. The lightweight metal corrugated oil conservator shell structure for transformers according to claim 1, characterized in that: The outer edges of the main board A (101), main board B (102), and each side plate of the top cover are all turned downwards, and bolt holes are provided on the turned edges.

3. The lightweight metal corrugated oil conservator shell structure for transformers according to claim 1, characterized in that: Bolt holes are provided at both the upper and lower ends of the main panel A (201), main panel B (204), and each cover plate.

4. The transformer internal oil-type lightweight metal corrugated oil conservator shell structure according to claim 1, characterized in that: The edge of the cabinet base (6) is turned down, and bolt holes are provided on the turned-down edge and the surface of the cabinet base (6).

5. The lightweight metal corrugated oil conservator shell structure for transformers according to claim 1, characterized in that: Both the main top cover A (101) and the main top cover B (102) are rectangular. Each side of the main top cover A (101) and the main top cover B (102) in the width direction has three triangular top cover side plates, namely, adjacent top cover side plates A (103), B (104), and C (105). One vertex of each of the three top cover side plates converges in the middle of the main top cover A (101) and the main top cover B (102). The outer edges of all three top cover side plates are turned downwards. Both the main panel A (201) and the main panel B (204) are rectangular. Each side of the main panel A (201) in the height direction has two square cover rotating plates, namely, cover rotating plate A (202) adjacent to the main panel A (201) and cover rotating plate B (203) adjacent to cover rotating plate A (202). The main panel B ( 204) Two square cover plates are provided on each side of the height direction, namely cover plate C (205) adjacent to the main panel B (204) and cover plate D (206) adjacent to cover plate C (205); the edges of cover plate B (203) and cover plate D (206) in the height direction are both turned inward, and bolt holes are opened on the turned edges. The flange on the cover is connected to the flange on the cover rotating plate D (206) by bolts; the upper end of the cover rotating plate A (202) is connected to the top cover side plate A (103) by bolts; the cover rotating plate B (203) is connected to the cover rotating plate D (206) by bolts, and then the upper end is connected to the top cover side plate B (104) by bolts; the upper end of the cover rotating plate C (205) is connected to the top cover side plate C (105) by bolts.

6. The lightweight metal corrugated oil conservator shell structure for transformers according to claim 1, characterized in that: The outer surfaces of the main panel A (201) and the main panel B (204) are both machined with grooves (207) on the inward side, thereby forming bosses (208) protruding from the inner surfaces of the main panel A (201) and the main panel B (204). The bosses (208) are used to roll into contact with the rollers (501) set on the top edge of the expansion core (5) installed inside the cabinet.

7. The lightweight metal corrugated oil conservator shell structure for transformers according to claim 6, characterized in that: The height direction of the groove (207) and the boss (208) is the same as the height direction of the main panel A (201) and the main panel B (204).

8. The lightweight metal corrugated oil conservator shell structure for transformers according to claim 1, characterized in that: At least one observation window (8) is provided on the main panel A (201), the main panel B (204) and each cover plate.

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