Lower-section oil tank oil sealing box, transformer oil tank and transformer
By designing a fully sealed lower fuel tank oil sealing box structure, the problem of residual welding slag and foreign matter after the transformer oil tank is difficult to clean, the high cleanliness of the transformer oil tank and the smooth oil circuit are achieved, and the service life of the transformer is extended.
Patent Information
- Application Number
- CN202421700489.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-18
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-18
AI Technical Summary
The residual welding slag and foreign matter left after welding of the transformer oil tank is difficult to completely clean, resulting in insufficient cleanliness of the oil tank and affecting the operation of the transformer.
A fully sealed oil sealing box structure of lower fuel saving tank is designed, including connecting the reinforcement to the lower fuel saving tank body to form a closed cavity, and an oil passage opening is provided at the oil guide pipe interface to avoid foreign matters entering and ensure the oil passage is unobstructed.
It realizes the fully sealed structure of the transformer oil tank, eliminates the entry of foreign objects, improves the cleanliness of the oil tank, ensures the smooth flow of the oil circuit, and extends the service life of the transformer.
Smart Images
Figure CN222867389U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of transformer manufacturing, in particular to a lower oil tank sealing box, a transformer oil tank and a transformer. Background Art
[0002] In recent years, the power industry has been developing rapidly. Among them, transformers, as an important part of the power system, have continued to grow in number and scale. As the overall skeleton of the oil-immersed transformer, the transformer oil tank bears the overall quality of the transformer winding and core on the one hand, and provides a sealed and clean space for the internal circulation of the transformer oil on the other hand.
[0003] Based on this, multiple slag cleaning holes are usually opened on the high and low voltage sides of the transformer lower oil tank to clean the welding slag and foreign matter remaining after the reinforced iron welding. However, due to the narrow operating space, operation, processing and painting are difficult, and the cleanliness of the inside of the oil tank is not fully guaranteed.
[0004] Therefore, how to provide a fully sealed oil box structure that can not only ensure the smooth flow of transformer oil circuits, but also effectively improve internal cleanliness and eliminate the risk of incomplete cleaning of welding slag and foreign matter is a problem that transformer designers need to solve. Utility Model Content
[0005] Based on this, it is necessary to provide a lower oil tank sealing box, a transformer oil tank and a transformer to address the risk of foreign matter remaining in the transformer oil tank welding and the problem of blocked oil circuits.
[0006] In a first aspect, the present application provides a lower oil tank sealing box, comprising:
[0007] The lower section oil tank body is provided with an oil guide pipe interface, and the oil guide pipe interface is used for oil in and out of the lower section oil tank body;
[0008] The reinforcement is connected with the lower oil tank body to form a closed cavity, and the reinforcement is provided with an oil passage opening corresponding to the oil guide pipe interface.
[0009] In one embodiment, the reinforcement member comprises:
[0010] A first sealing surface connected to a first surface of the lower oil tank body;
[0011] A second sealing surface is connected to a second surface of the lower oil tank body;
[0012] The third sealing surface is connected to the first sealing surface and the second sealing surface; the first sealing surface, the second sealing surface, the third sealing surface and the lower oil tank body form a closed cavity.
[0013] In one of the embodiments, the first sealing surface and the second sealing surface are provided with oil passage openings corresponding to the oil guide pipe interface, so as to form an oil passage in the lower oil tank body.
[0014] In one embodiment, the oil sealing box further comprises:
[0015] The sealing plate is connected to the reinforcement member and the lower oil tank body and is used to divide the closed cavity into a plurality of independent cavities, and an oil path is formed between the sealing plate and the third sealing surface.
[0016] In one of the embodiments, the cross-sectional dimensions of the sealing plate, the lower fuel tank body and the reinforcement in the second direction are the same.
[0017] In one embodiment, two ends of the third sealing surface are connected to two opposite surfaces of the lower oil tank body in the first direction.
[0018] In one embodiment, the oil sealing box further comprises:
[0019] The vent hole is arranged on the lower section fuel tank body and / or reinforcement and is used to connect the closed cavity with the external space.
[0020] In one of the embodiments, the dimension of the oil passage opening in the first direction is not less than the dimension of the oil guide pipe interface in the first direction.
[0021] In a second aspect, the present application provides a transformer oil tank, including the lower oil tank sealing box in any embodiment of the first aspect;
[0022] In a third aspect, the present application provides a transformer, comprising the lower oil tank sealing box in any embodiment of the first aspect or the transformer oil tank in any embodiment of the second aspect.
[0023] The above-mentioned lower oil tank sealing box, transformer oil tank and transformer, the lower oil tank sealing box is a fully sealed structure, the reinforcement and the lower oil tank body form a closed cavity, there is no need to fill the closed cavity with transformer oil, foreign matter in the closed cavity is prevented from entering the lower oil tank body, thereby ensuring the overall cleanliness of the transformer; the reinforcement is provided with an oil passage at the oil guide pipe interface, forming a complete oil inlet and outlet path in the lower oil tank body, thereby avoiding affecting the smooth flow of the oil passage. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0025] Figure 1This is a structural schematic diagram of the oil sealing box of the lower oil tank in one embodiment of the utility model;
[0026] Figure 2 It is a top view of the oil sealing box of the lower oil tank in one embodiment of the utility model;
[0027] Figure 3 It is a cross-sectional view of the oil sealing box of the lower oil tank in one embodiment of the utility model;
[0028] Figure 4 This is a schematic diagram of a sealing plate in one embodiment of the utility model;
[0029] Figure 5 It is a schematic diagram of the connection between the oil guide pipe interface and the oil guide pipe in one embodiment of the utility model.
[0030] The reference numerals in the specific implementation manner are as follows:
[0031] The lower oil tank body 10, the oil pipe interface 102, the oil passage 104, the oil pipe 106, the vent hole 108, the reinforcement 20, the first sealing surface 202, the second sealing surface 204, the third sealing surface 206, the sealing plate 208, the first sealing cavity 210, the second sealing cavity 212, and the third sealing cavity 214. DETAILED DESCRIPTION
[0032] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.
[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.
[0034] 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 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, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0036] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0037] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0038] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.
[0039] In the present invention, unless otherwise clearly specified and limited, the first direction is the X direction, the second direction is the Y direction, and the first direction is perpendicular to the second direction.
[0040] The applicant noted that when the oil tank of the oil-immersed transformer is modified to save oil, a long strip of bent reinforcing iron is arranged on the high and low voltage sides of the non-transformer lower oil-saving tank to increase the overall strength of the tank; after welding, multiple slag cleaning holes are opened on the reinforcing iron to clean the welding slag and foreign matter left after welding the reinforcing iron, but due to the narrow operating space, the cleanliness of the oil tank cannot be guaranteed. During the operation of the transformer, the welding slag and foreign matter are not cleaned up, which will contaminate the transformer oil and affect the operation of the transformer.
[0041] See also Figure 1 , Figure 1 The structure diagram of the oil sealing box of the lower oil tank in one embodiment of the utility model is shown. The oil sealing box of the lower oil tank provided in one embodiment of the utility model comprises a lower oil tank body 10 and a reinforcement 20. The lower oil tank body 10 is provided with an oil guide pipe interface 102, which is used for oil in and out of the lower oil tank body 10; the reinforcement 20 is connected to the lower oil tank body 10 to form a closed cavity, and the reinforcement 20 is provided with an oil passage 104 corresponding to the oil guide pipe interface.
[0042] Among them, the lower oil tank is the lower part of the transformer oil tank. The lower oil tank is generally a trough-shaped box bottom or a flat box bottom, which is used to carry the transformer.
[0043] Specifically, the lower section oil tank body 10 is provided with an oil pipe interface 102, which is arranged on the long side of the lower section oil tank, and the oil pipe interface 102 is tightly connected to the oil pipe, and the reinforcement 20 is connected to the lower section oil tank body 1010 to form a closed cavity; the closed cavity is completely sealed and completely isolated from the lower section oil tank body 10. Exemplarily, the size of the reinforcement 20 in the first direction is the same as the size of the lower section oil tank body 10 in the first direction, and the reinforcement 20 is connected to the long side with the oil pipe interface, the reinforcement 20 and the lower section oil tank body 10 form a closed space, and an oil passage 104 is arranged at the position corresponding to the oil pipe interface, so that the oil pipe interface 102 can smoothly enter and exit the oil circuit.
[0044] Optionally, the reinforcement 20 is integrally formed and an oil passage 104 is opened corresponding to the oil pipe interface 102 , or the reinforcement 20 uses the oil pipe interface 102 as a dividing point to form a plurality of independent closed cavities with the lower oil tank body 10 .
[0045] In this embodiment, the oil sealing box of the lower oil tank is a fully sealed structure, and the reinforcement 20 and the lower oil tank body 10 form a closed cavity. There is no need to fill the closed cavity with transformer oil, which prevents foreign matter in the closed cavity from entering the lower oil tank body 10, thereby ensuring the overall cleanliness of the transformer; the reinforcement 20 is provided with an oil passage at the oil guide pipe interface, forming a complete oil inlet and outlet passage in the lower oil tank body 10, thereby avoiding affecting the smooth flow of the oil passage.
[0046] Please continue reading Figure 1 In some embodiments, the reinforcement member includes a first sealing surface, a second sealing surface, and a third sealing surface.
[0047] Specifically, the first sealing surface 202 is connected to the first surface of the lower oil tank body 10; the second sealing surface 204 is connected to the second surface of the lower oil tank body 10; the third sealing surface 206 is connected to the first sealing surface and the second sealing surface, and the first sealing surface 202, the second sealing surface 204, the third sealing surface 206 and the lower oil tank body 10 form a closed cavity. At the oil pipe interface 102, the first sealing surface 202 and the second sealing surface 204 are provided with an oil passage 104, and the size of the oil passage 104 in the first direction is not less than the size of the oil pipe interface 102 in the first direction. Optionally, the reinforcement 20 is an integrated component with a long strip shape, and the first sealing surface 202, the second sealing surface 204 and the third sealing surface 206 are formed by bending, and are welded to the lower oil tank body 10, and the oil passage 104 is formed at the oil pipe interface 102.
[0048] Exemplarily, the dimensions of the first sealing surface 202, the second sealing surface 204 and the third sealing surface 206 in the first direction are the same as the dimensions of the lower fuel tank body 10 in the first direction, the first sealing surface 202 is vertically connected to the bottom surface of the lower fuel tank body 10, and the second sealing surface 204 is vertically connected to the long side surface of the lower fuel tank body 10; the edges of the first sealing surface 202 and the second sealing surface 204 away from the lower fuel tank body 10 are respectively connected to the third sealing surface 206, so that the first sealing surface 202, the second sealing surface 204, the third sealing surface 206 and the lower fuel tank body 10 form a closed cavity. Optionally, the closed cavity formed by the reinforcement 20 and the lower fuel tank body 10 is a complete closed cavity or a plurality of independent cavities.
[0049] The diameter of the oil pipe interface 102 is slightly smaller than the height of the second surface of the lower oil tank body 10. The reinforcement 20 blocks part or all of the oil pipe interface 102. To ensure that the oil circuit at the oil pipe interface 102 is unobstructed, an oil circuit opening 104 is provided on the first sealing surface 202 and the second sealing surface 204 connected to the lower oil tank body 10. The size of the oil circuit opening 104 in the first direction is not less than the size of the oil pipe interface 102 in the first direction. The third sealing surface 206 is connected to the two opposite surfaces of the lower oil tank body 10 in the first direction, and the first sealing surface 202 and the second sealing surface 204 are connected to the third sealing surface 206 away from the edge of the lower oil tank body 10. The third sealing surface 206 remains intact as a whole and does not correspond to the oil circuit opening 104. Figure 2 and Figure 5 As shown, Figure 2 The top view of the oil sealing box of the lower oil tank in one embodiment of the utility model is shown. Figure 2The schematic diagram of the connection between the oil pipe interface and the oil pipe in an embodiment of the utility model is shown. The oil pipe interface is sequentially arranged on the lower oil tank body 10 along the first direction. The transformer oil flows into the lower oil tank body 10 through the oil pipe 106 interface and flows along the first direction.
[0050] In this embodiment, the third sealing surface 206 remains intact as a whole, does not correspond to the oil passage opening 104, and is connected to the two opposite surfaces of the lower oil tank body 10, thereby improving the overall strength of the lower oil tank body; the first sealing surface 202 and the second sealing surface 204 of the reinforcement 20 are provided with the oil passage opening 104 relative to the oil guide pipe interface 102, thereby ensuring smooth oil circulation.
[0051] Please continue reading Figure 3 and Figure 4 , Figure 3 The cross-sectional view of the oil sealing box of the lower oil tank in one embodiment of the utility model is shown. Figure 4 A schematic diagram of a sealing plate in an embodiment of the utility model is shown. In some embodiments, the lower section oil tank sealing box further includes a sealing plate 208, the sealing plate 208 has the same cross-sectional dimensions as the lower section oil tank body 10 and the reinforcement 20 in the second direction, the sealing plate 208 is connected to the reinforcement 20 and the lower section oil tank body 10, and is used to divide the closed cavity into a plurality of independent cavities, and an oil path is formed between the sealing plate 208 and the third sealing surface 206.
[0052] Specifically, the first sealing surface 202 and the second sealing surface 204 of the reinforcement 20 are provided with an oil passage 104 at the oil pipe interface 102, and the size of the oil passage 104 in the first direction is the same as the size of the oil pipe interface 102 in the first direction; the closed cavity formed by the reinforcement 20 and the lower section oil tank body 10 is connected to the outside at the oil passage 104. The edges of the sealing plate 208 are respectively connected to the first sealing surface 202, the second sealing surface 204, the third sealing surface 206 and the lower section oil tank body 10, so that the closed cavity remains in a closed state; at this time, the sealing plate 208, the reinforcement 20 and the lower section oil tank body 10 form a closed cavity.
[0053] Exemplary, combined Figure 2As shown, there are multiple oil pipe interfaces 102, and multiple oil passage openings 104 are correspondingly arranged on the reinforcement 20, and the first sealing surface 202 and the second sealing surface 204 are sequentially provided with oil passage openings 104; the sealing cavity is divided into a first sealing cavity 210, a second sealing cavity 212 and a third sealing cavity 214. The first sealing cavity and the third sealing cavity are respectively formed by connecting the first sealing surface 202, the second sealing surface 204, the third sealing surface 206 and the lower section oil tank body 10; the second sealing cavity 212 is located between the oil pipe interfaces 102, and is formed by connecting the first sealing surface 202, the second sealing surface 204, the third sealing surface 206, two sealing plates 208 and the lower section oil tank body 10.
[0054] Optionally, the sealing plate 20, the reinforcement member 20 and the lower fuel tank body 10 are connected by welding, and the multiple sealed cavities formed are not conductive to the external environment.
[0055] In this embodiment, a plurality of sealed cavities are divided by the sealing plate 208, and each sealed cavity does not interact with the external environment. Moreover, the sealed cavity does not need to be filled with transformer oil, and thus there is no need to open a cleaning hole to clean the sealed cavity, thereby preventing welding foreign matter from entering the lower oil tank along with the transformer oil; and saving the corresponding volume of transformer oil in the sealing box cavity of the lower oil tank.
[0056] Please continue reading Figure 1 and Figure 2 In some embodiments, the oil sealing box of the lower section oil tank further includes a vent hole 108, which is disposed in the lower section oil tank body 10 and / or the reinforcement 20, and is used to connect the closed cavity with the external space.
[0057] Specifically, the reinforcement 20 and the lower fuel tank body 10 are welded to form a closed cavity, and a switchable vent 108 is provided on the closed cavity. Optionally, the vent 108 can be provided on the lower fuel tank body 10 or on the reinforcement 20. Exemplarily, when the lower fuel tank body 10 has only one oil pipe interface 102, the reinforcement 20 is provided with an oil passage 104, which is combined with the sealing plate 208 to form two sealed cavities, and the two sealed cavities are both composed of the lower fuel tank body 10, the reinforcement 20 and the sealing plate 208. At this time, the vent 108 is connected to the lower fuel tank body 10. Optionally, when the lower fuel tank body 10 has at least two oil pipe interfaces 102, three or more sealed cavities are formed. Figure 2 For example, the vent holes 108 of the first sealed cavity 210 and the third sealed cavity 214 are arranged on the lower fuel tank body 10, and the vent holes 108 of the second sealed cavity 212 are arranged on the first sealing surface 202 or the second sealing surface 204 of the reinforcement 20. The vent holes 108 on the lower fuel tank body 10 are arranged on two opposite surfaces along the first direction.
[0058] After the reinforcement 20, the sealing plate 108 and the lower section of the fuel tank body 10 are welded, the impurities and residues generated by the welding are cleaned, foaming water is applied to the welding joints, the sealing cavity is inflated through the vent 108, and it is observed whether bubbles appear; if bubbles appear at the weld, there is a leak there, the sealing cavity is not completely sealed, and the welding and sealing are performed again; if no bubbles appear at the weld, it indicates that the sealing effect of the sealing cavity is good, and the vent is closed to ensure the sealing of the sealing cavity.
[0059] In this embodiment, a vent hole 108 is provided for each sealed cavity, and the airtightness of the sealed cavity is checked through the vent hole 108, thereby preventing welding slag and foreign matter from entering the cavity of the lower oil tank along with the transformer oil, thereby avoiding affecting the quality of the transformer.
[0060] In some optional embodiments, the reinforcement 20 of the lower oil tank body sealing box includes components connected to two opposite sides of the lower oil tank body 10 in the first direction; the lower oil tank body sealing box also includes a plurality of sealing boxes, the sealing boxes match the bottom edge of the lower oil tank body 10; the sealing boxes are fixedly connected to the lower oil tank body 10 and the reinforcement 20. Optionally, the sealing boxes are connected to the lower oil tank body 10 and the reinforcement 20 by welding. The diameter of the oil guide pipe interface 102 is slightly smaller than the height of the second side of the lower oil tank body 10, the sealing boxes are arranged along the first direction, and a spacing space is reserved at the oil guide pipe interface 102, and the transformer oil enters the lower oil tank body 10 through the oil guide pipe interface 102 and the spacing between the sealing boxes.
[0061] The oil sealing box of the lower oil tank body is provided with a vent hole 108, and the vent hole 108 is arranged on the lower oil tank body 10 or the sealed box body, and is used to connect the sealed box body with the external space. When the lower oil tank body 10 has and only has one oil pipe interface 102, two sealed box bodies are fixedly connected, and the two sealed box bodies are fixedly connected to the lower oil tank body 10 and the reinforcement 20, and the vent hole runs through the lower oil tank body 10 and the sealed box body. Optionally, when the lower oil tank body 10 has at least two oil pipe interfaces 102, three or more sealed box bodies are set, wherein the vent holes 108 of the sealed box bodies at both ends run through the lower oil tank body 10 and the sealed box body, and the vent holes 108 of the middle sealed box body are set on the sealed box body. Among them, the vent holes on the lower oil tank body 10 are set on two opposite sides along the first direction.
[0062] In this embodiment, by providing a sealed box body that matches the lower oil tank body 10, transformer oil cannot enter the sealed box body, thereby preventing welding slag and foreign matter from entering the transformer coil during the welding process, thereby reducing the hidden danger of low cleanliness inside the oil tank.
[0063] In some embodiments, an embodiment of the utility model provides a transformer oil tank, including an upper oil tank sealing box and a lower oil tank sealing box as in other embodiments. The upper oil tank sealing box is similar in structure to the lower oil tank sealing box, including an upper oil tank body and a reinforcement 20.
[0064] Optionally, the upper oil tank body is provided with an oil guide pipe interface, which is arranged on the long side of the upper oil tank, the oil guide pipe interface is tightly connected to the oil guide pipe, and the reinforcement 20 is connected to the upper oil tank body to form a closed cavity; the closed cavity is completely sealed and completely isolated from the upper oil tank body. Exemplarily, the size of the reinforcement 20 in the first direction is the same as the size of the upper oil tank body in the first direction, and the reinforcement 20 is connected to the long side with the oil guide pipe interface, the reinforcement 20 forms a closed space with the upper oil tank body, and an oil passage is arranged at the position corresponding to the oil guide pipe interface, so that the oil guide pipe interface can smoothly enter and exit the oil circuit. Among them, the upper oil tank sealing box is detachably connected to the lower oil tank sealing box, and the transformer oil can only enter and exit through the oil guide pipe interface of the upper oil tank sealing box or the lower oil tank sealing box.
[0065] In this embodiment, the transformer oil tank reduces the amount of transformer oil in the transformer oil tank and improves the structural strength of the transformer oil tank through the oil-saving box sealing box and the lower oil-saving box sealing box. The transformer oil tank is a fully sealed structure, including multiple closed cavities. The closed cavities do not need to be filled with transformer oil, which prevents foreign matter in the closed cavities from entering the transformer oil tank, ensuring the overall cleanliness of the transformer.
[0066] In some embodiments, an embodiment of the utility model provides a transformer, including the lower oil tank sealing box or transformer oil tank in other embodiments.
[0067] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.
[0068] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.
Claims
1. A lower oil tank sealing box, characterized in that: The oil sealing box comprises: The lower section oil tank body is provided with an oil guide pipe interface, and the oil guide pipe interface is used for oil in and out of the lower section oil tank body; A reinforcement piece is connected to the lower oil tank body to form a closed cavity, and an oil passage opening is provided on the reinforcement piece corresponding to the oil guide pipe interface.
2. The oil sealing box according to claim 1, characterized in that: The reinforcement member comprises: A first sealing surface connected to a first surface of the lower oil tank body; A second sealing surface connected to the second surface of the lower oil tank body; The third sealing surface is connected to the first sealing surface and the second sealing surface; the first sealing surface, the second sealing surface, the third sealing surface and the lower oil tank body form a closed cavity.
3. The oil sealing box according to claim 2, characterized in that: The first sealing surface and the second sealing surface are provided with oil passage openings corresponding to the oil guide pipe interface, so as to form an oil passage in the lower oil tank body.
4. The oil sealing box according to claim 3, characterized in that: Also includes: A sealing plate is connected to the reinforcement member and the lower oil tank body and is used to divide the closed cavity into a plurality of independent cavities. An oil path is formed between the sealing plate and the third sealing surface.
5. The oil sealing box according to claim 4, characterized in that: The sealing plate has the same cross-sectional dimensions as the lower fuel tank body and the reinforcement in the second direction.
6. The oil sealing box according to claim 2, characterized in that: Both ends of the third sealing surface are connected to two opposite surfaces of the lower oil tank body in the first direction.
7. The oil sealing box according to claim 1, characterized in that: Also includes: A vent hole is provided on the lower section fuel tank body and / or the reinforcement member, and is used to connect the enclosed cavity with the external space.
8. The oil sealing box according to claim 1, characterized in that: The dimension of the oil passage opening in the first direction is not less than the dimension of the oil guide pipe interface in the first direction.
9. A transformer oil tank, characterized in that: It comprises the oil sealing box of the lower oil tank as described in any one of claims 1-8.
10. A transformer, characterized in that: It comprises the lower oil tank sealing box as described in any one of claims 1 to 8, or the transformer oil tank as described in claim 9.